^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Linux NET3: Internet Group Management Protocol [IGMP]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This code implements the IGMP protocol as defined in RFC1112. There has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * been a further revision of this protocol since which is now supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * If you have trouble with this module be careful what gcc you have used,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * the older version didn't come out right using gcc 2.5.8, the newer one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * seems to fall out with gcc 2.6.2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Alan Cox <alan@lxorguk.ukuu.org.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Fixes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Alan Cox : Added lots of __inline__ to optimise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * the memory usage of all the tiny little
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Alan Cox : Dumped the header building experiment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Alan Cox : Minor tweaks ready for multicast routing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * and extended IGMP protocol.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Alan Cox : Removed a load of inline directives. Gcc 2.5.8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * writes utterly bogus code otherwise (sigh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * fixed IGMP loopback to behave in the manner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * desired by mrouted, fixed the fact it has been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * broken since 1.3.6 and cleaned up a few minor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * points.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Chih-Jen Chang : Tried to revise IGMP to Version 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Tsu-Sheng Tsao E-mail: chihjenc@scf.usc.edu and tsusheng@scf.usc.edu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * The enhancements are mainly based on Steve Deering's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * ipmulti-3.5 source code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * Chih-Jen Chang : Added the igmp_get_mrouter_info and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Tsu-Sheng Tsao igmp_set_mrouter_info to keep track of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * the mrouted version on that device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * Chih-Jen Chang : Added the max_resp_time parameter to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Tsu-Sheng Tsao igmp_heard_query(). Using this parameter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * to identify the multicast router version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * and do what the IGMP version 2 specified.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * Chih-Jen Chang : Added a timer to revert to IGMP V2 router
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * Tsu-Sheng Tsao if the specified time expired.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * Alan Cox : Stop IGMP from 0.0.0.0 being accepted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * Alan Cox : Use GFP_ATOMIC in the right places.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * Christian Daudt : igmp timer wasn't set for local group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * memberships but was being deleted,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * which caused a "del_timer() called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * from %p with timer not initialized\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * message (960131).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * Christian Daudt : removed del_timer from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * igmp_timer_expire function (960205).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Christian Daudt : igmp_heard_report now only calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * igmp_timer_expire if tm->running is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * true (960216).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * Malcolm Beattie : ttl comparison wrong in igmp_rcv made
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * igmp_heard_query never trigger. Expiry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * miscalculation fixed in igmp_heard_query
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * and random() made to return unsigned to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * prevent negative expiry times.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * Alexey Kuznetsov: Wrong group leaving behaviour, backport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * fix from pending 2.1.x patches.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Alan Cox: Forget to enable FDDI support earlier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * Alexey Kuznetsov: Fixed leaving groups on device down.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Alexey Kuznetsov: Accordance to igmp-v2-06 draft.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * David L Stevens: IGMPv3 support, with help from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * Vinay Kulkarni
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #include <linux/socket.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #include <linux/sockios.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #include <linux/inet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #include <linux/inetdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #include <linux/igmp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #include <linux/times.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #include <linux/pkt_sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #include <linux/byteorder/generic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #include <net/arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #include <net/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #include <net/protocol.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #include <net/route.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #include <net/checksum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #include <net/inet_common.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #include <linux/netfilter_ipv4.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #ifdef CONFIG_IP_MROUTE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #include <linux/mroute.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /* Parameter names and values are taken from igmp-v2-06 draft */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define IGMP_QUERY_INTERVAL (125*HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define IGMP_QUERY_RESPONSE_INTERVAL (10*HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define IGMP_INITIAL_REPORT_DELAY (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* IGMP_INITIAL_REPORT_DELAY is not from IGMP specs!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * IGMP specs require to report membership immediately after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * joining a group, but we delay the first report by a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * small interval. It seems more natural and still does not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * contradict to specs provided this delay is small enough.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define IGMP_V1_SEEN(in_dev) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), FORCE_IGMP_VERSION) == 1 || \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) IN_DEV_CONF_GET((in_dev), FORCE_IGMP_VERSION) == 1 || \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) ((in_dev)->mr_v1_seen && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) time_before(jiffies, (in_dev)->mr_v1_seen)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #define IGMP_V2_SEEN(in_dev) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), FORCE_IGMP_VERSION) == 2 || \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) IN_DEV_CONF_GET((in_dev), FORCE_IGMP_VERSION) == 2 || \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) ((in_dev)->mr_v2_seen && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) time_before(jiffies, (in_dev)->mr_v2_seen)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int unsolicited_report_interval(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) int interval_ms, interval_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) interval_ms = IN_DEV_CONF_GET(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) IGMPV2_UNSOLICITED_REPORT_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) else /* v3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) interval_ms = IN_DEV_CONF_GET(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) IGMPV3_UNSOLICITED_REPORT_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) interval_jiffies = msecs_to_jiffies(interval_ms);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* _timer functions can't handle a delay of 0 jiffies so ensure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * we always return a positive value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (interval_jiffies <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) interval_jiffies = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return interval_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) gfp_t gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static void igmpv3_clear_delrec(struct in_device *in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static int sf_setstate(struct ip_mc_list *pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static void sf_markstate(struct ip_mc_list *pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static void ip_mc_clear_src(struct ip_mc_list *pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) int sfcount, __be32 *psfsrc, int delta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static void ip_ma_put(struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (refcount_dec_and_test(&im->refcnt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) in_dev_put(im->interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) kfree_rcu(im, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #define for_each_pmc_rcu(in_dev, pmc) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) for (pmc = rcu_dereference(in_dev->mc_list); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) pmc != NULL; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) pmc = rcu_dereference(pmc->next_rcu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) #define for_each_pmc_rtnl(in_dev, pmc) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) for (pmc = rtnl_dereference(in_dev->mc_list); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) pmc != NULL; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) pmc = rtnl_dereference(pmc->next_rcu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static void ip_sf_list_clear_all(struct ip_sf_list *psf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct ip_sf_list *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) while (psf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) next = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) kfree(psf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) psf = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * Timer management
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static void igmp_stop_timer(struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) spin_lock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (del_timer(&im->timer))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) refcount_dec(&im->refcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) im->tm_running = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) im->reporter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) im->unsolicit_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* It must be called with locked im->lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static void igmp_start_timer(struct ip_mc_list *im, int max_delay)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int tv = prandom_u32() % max_delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) im->tm_running = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!mod_timer(&im->timer, jiffies+tv+2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) refcount_inc(&im->refcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static void igmp_gq_start_timer(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) int tv = prandom_u32() % in_dev->mr_maxdelay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) unsigned long exp = jiffies + tv + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (in_dev->mr_gq_running &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) time_after_eq(exp, (in_dev->mr_gq_timer).expires))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) in_dev->mr_gq_running = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (!mod_timer(&in_dev->mr_gq_timer, exp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) in_dev_hold(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static void igmp_ifc_start_timer(struct in_device *in_dev, int delay)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int tv = prandom_u32() % delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (!mod_timer(&in_dev->mr_ifc_timer, jiffies+tv+2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) in_dev_hold(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static void igmp_mod_timer(struct ip_mc_list *im, int max_delay)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) spin_lock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) im->unsolicit_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (del_timer(&im->timer)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if ((long)(im->timer.expires-jiffies) < max_delay) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) add_timer(&im->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) im->tm_running = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) refcount_dec(&im->refcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) igmp_start_timer(im, max_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * Send an IGMP report.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) #define IGMP_SIZE (sizeof(struct igmphdr)+sizeof(struct iphdr)+4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) static int is_in(struct ip_mc_list *pmc, struct ip_sf_list *psf, int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) int gdeleted, int sdeleted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) case IGMPV3_MODE_IS_INCLUDE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) case IGMPV3_MODE_IS_EXCLUDE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (gdeleted || sdeleted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (!(pmc->gsquery && !psf->sf_gsresp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (pmc->sfmode == MCAST_INCLUDE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) /* don't include if this source is excluded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * in all filters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (psf->sf_count[MCAST_INCLUDE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return type == IGMPV3_MODE_IS_INCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return pmc->sfcount[MCAST_EXCLUDE] ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) psf->sf_count[MCAST_EXCLUDE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) case IGMPV3_CHANGE_TO_INCLUDE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (gdeleted || sdeleted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return psf->sf_count[MCAST_INCLUDE] != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) case IGMPV3_CHANGE_TO_EXCLUDE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if (gdeleted || sdeleted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (pmc->sfcount[MCAST_EXCLUDE] == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) psf->sf_count[MCAST_INCLUDE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return pmc->sfcount[MCAST_EXCLUDE] ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) psf->sf_count[MCAST_EXCLUDE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) case IGMPV3_ALLOW_NEW_SOURCES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (gdeleted || !psf->sf_crcount)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return (pmc->sfmode == MCAST_INCLUDE) ^ sdeleted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) case IGMPV3_BLOCK_OLD_SOURCES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (pmc->sfmode == MCAST_INCLUDE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) return gdeleted || (psf->sf_crcount && sdeleted);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return psf->sf_crcount && !gdeleted && !sdeleted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) igmp_scount(struct ip_mc_list *pmc, int type, int gdeleted, int sdeleted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) int scount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) for (psf = pmc->sources; psf; psf = psf->sf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (!is_in(pmc, psf, type, gdeleted, sdeleted))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) scount++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) return scount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) /* source address selection per RFC 3376 section 4.2.13 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) static __be32 igmpv3_get_srcaddr(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) const struct flowi4 *fl4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) struct in_device *in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) const struct in_ifaddr *ifa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return htonl(INADDR_ANY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) in_dev_for_each_ifa_rcu(ifa, in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (fl4->saddr == ifa->ifa_local)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) return fl4->saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return htonl(INADDR_ANY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static struct sk_buff *igmpv3_newpack(struct net_device *dev, unsigned int mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) struct rtable *rt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct iphdr *pip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) struct igmpv3_report *pig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct net *net = dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) struct flowi4 fl4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) int hlen = LL_RESERVED_SPACE(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) int tlen = dev->needed_tailroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) unsigned int size = mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) skb = alloc_skb(size + hlen + tlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) GFP_ATOMIC | __GFP_NOWARN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) size >>= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) if (size < 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) skb->priority = TC_PRIO_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) rt = ip_route_output_ports(net, &fl4, NULL, IGMPV3_ALL_MCR, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) IPPROTO_IGMP, 0, dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (IS_ERR(rt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) skb_dst_set(skb, &rt->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) skb_reserve(skb, hlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) skb_tailroom_reserve(skb, mtu, tlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) pip = ip_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) skb_put(skb, sizeof(struct iphdr) + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) pip->version = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) pip->ihl = (sizeof(struct iphdr)+4)>>2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) pip->tos = 0xc0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) pip->frag_off = htons(IP_DF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) pip->ttl = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) pip->daddr = fl4.daddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) pip->saddr = igmpv3_get_srcaddr(dev, &fl4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) pip->protocol = IPPROTO_IGMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) pip->tot_len = 0; /* filled in later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) ip_select_ident(net, skb, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) ((u8 *)&pip[1])[0] = IPOPT_RA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) ((u8 *)&pip[1])[1] = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) ((u8 *)&pip[1])[2] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) ((u8 *)&pip[1])[3] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) skb->transport_header = skb->network_header + sizeof(struct iphdr) + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) skb_put(skb, sizeof(*pig));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) pig = igmpv3_report_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) pig->type = IGMPV3_HOST_MEMBERSHIP_REPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) pig->resv1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) pig->csum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) pig->resv2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) pig->ngrec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) static int igmpv3_sendpack(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) struct igmphdr *pig = igmp_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) const int igmplen = skb_tail_pointer(skb) - skb_transport_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) pig->csum = ip_compute_csum(igmp_hdr(skb), igmplen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) return ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) static int grec_size(struct ip_mc_list *pmc, int type, int gdel, int sdel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return sizeof(struct igmpv3_grec) + 4*igmp_scount(pmc, type, gdel, sdel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) static struct sk_buff *add_grhead(struct sk_buff *skb, struct ip_mc_list *pmc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) int type, struct igmpv3_grec **ppgr, unsigned int mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct net_device *dev = pmc->interface->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct igmpv3_report *pih;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct igmpv3_grec *pgr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) skb = igmpv3_newpack(dev, mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) pgr = skb_put(skb, sizeof(struct igmpv3_grec));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) pgr->grec_type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) pgr->grec_auxwords = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) pgr->grec_nsrcs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) pgr->grec_mca = pmc->multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) pih = igmpv3_report_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) pih->ngrec = htons(ntohs(pih->ngrec)+1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) *ppgr = pgr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) int type, int gdeleted, int sdeleted)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) struct net_device *dev = pmc->interface->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) struct net *net = dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) struct igmpv3_report *pih;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct igmpv3_grec *pgr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) struct ip_sf_list *psf, *psf_next, *psf_prev, **psf_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) int scount, stotal, first, isquery, truncate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) unsigned int mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) if (pmc->multiaddr == IGMP_ALL_HOSTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (ipv4_is_local_multicast(pmc->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) mtu = READ_ONCE(dev->mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (mtu < IPV4_MIN_MTU)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) isquery = type == IGMPV3_MODE_IS_INCLUDE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) type == IGMPV3_MODE_IS_EXCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) truncate = type == IGMPV3_MODE_IS_EXCLUDE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) type == IGMPV3_CHANGE_TO_EXCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) stotal = scount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) psf_list = sdeleted ? &pmc->tomb : &pmc->sources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (!*psf_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) goto empty_source;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) pih = skb ? igmpv3_report_hdr(skb) : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) /* EX and TO_EX get a fresh packet, if needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (truncate) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (pih && pih->ngrec &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) igmpv3_sendpack(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) skb = igmpv3_newpack(dev, mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) first = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) psf_prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) for (psf = *psf_list; psf; psf = psf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) __be32 *psrc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) psf_next = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) psf_prev = psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) /* Based on RFC3376 5.1. Should not send source-list change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * records when there is a filter mode change.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (((gdeleted && pmc->sfmode == MCAST_EXCLUDE) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) (!gdeleted && pmc->crcount)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) (type == IGMPV3_ALLOW_NEW_SOURCES ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) goto decrease_sf_crcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) /* clear marks on query responses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (isquery)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) psf->sf_gsresp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if (AVAILABLE(skb) < sizeof(__be32) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) first*sizeof(struct igmpv3_grec)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) if (truncate && !first)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) break; /* truncate these */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (pgr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) pgr->grec_nsrcs = htons(scount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) igmpv3_sendpack(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) skb = igmpv3_newpack(dev, mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) first = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) scount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if (first) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) skb = add_grhead(skb, pmc, type, &pgr, mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) first = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) psrc = skb_put(skb, sizeof(__be32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) *psrc = psf->sf_inaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) scount++; stotal++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if ((type == IGMPV3_ALLOW_NEW_SOURCES ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) decrease_sf_crcount:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) psf->sf_crcount--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) if (psf_prev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) psf_prev->sf_next = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) *psf_list = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) kfree(psf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) psf_prev = psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) empty_source:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) if (!stotal) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) if (type == IGMPV3_ALLOW_NEW_SOURCES ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) type == IGMPV3_BLOCK_OLD_SOURCES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (pmc->crcount || isquery) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) /* make sure we have room for group header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if (skb && AVAILABLE(skb) < sizeof(struct igmpv3_grec)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) igmpv3_sendpack(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) skb = NULL; /* add_grhead will get a new one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) skb = add_grhead(skb, pmc, type, &pgr, mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (pgr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) pgr->grec_nsrcs = htons(scount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (isquery)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) pmc->gsquery = 0; /* clear query state on report */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) static int igmpv3_send_report(struct in_device *in_dev, struct ip_mc_list *pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) struct sk_buff *skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) int type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (!pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) for_each_pmc_rcu(in_dev, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) if (pmc->multiaddr == IGMP_ALL_HOSTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (ipv4_is_local_multicast(pmc->multiaddr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) !net->ipv4.sysctl_igmp_llm_reports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) spin_lock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (pmc->sfcount[MCAST_EXCLUDE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) type = IGMPV3_MODE_IS_EXCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) type = IGMPV3_MODE_IS_INCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) skb = add_grec(skb, pmc, type, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) spin_unlock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) spin_lock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) if (pmc->sfcount[MCAST_EXCLUDE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) type = IGMPV3_MODE_IS_EXCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) type = IGMPV3_MODE_IS_INCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) skb = add_grec(skb, pmc, type, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) spin_unlock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) return igmpv3_sendpack(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) * remove zero-count source records from a source filter list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) static void igmpv3_clear_zeros(struct ip_sf_list **ppsf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) struct ip_sf_list *psf_prev, *psf_next, *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) psf_prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) for (psf = *ppsf; psf; psf = psf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) psf_next = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if (psf->sf_crcount == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (psf_prev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) psf_prev->sf_next = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) *ppsf = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) kfree(psf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) psf_prev = psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) static void kfree_pmc(struct ip_mc_list *pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) ip_sf_list_clear_all(pmc->sources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) ip_sf_list_clear_all(pmc->tomb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) kfree(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) static void igmpv3_send_cr(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) struct ip_mc_list *pmc, *pmc_prev, *pmc_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct sk_buff *skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) int type, dtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) spin_lock_bh(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) /* deleted MCA's */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) pmc_prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) for (pmc = in_dev->mc_tomb; pmc; pmc = pmc_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) pmc_next = pmc->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (pmc->sfmode == MCAST_INCLUDE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) type = IGMPV3_BLOCK_OLD_SOURCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) dtype = IGMPV3_BLOCK_OLD_SOURCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) skb = add_grec(skb, pmc, type, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) skb = add_grec(skb, pmc, dtype, 1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) if (pmc->crcount) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) if (pmc->sfmode == MCAST_EXCLUDE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) type = IGMPV3_CHANGE_TO_INCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) skb = add_grec(skb, pmc, type, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) pmc->crcount--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (pmc->crcount == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) igmpv3_clear_zeros(&pmc->tomb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) igmpv3_clear_zeros(&pmc->sources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (pmc->crcount == 0 && !pmc->tomb && !pmc->sources) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) if (pmc_prev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) pmc_prev->next = pmc_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) in_dev->mc_tomb = pmc_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) in_dev_put(pmc->interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) kfree_pmc(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) pmc_prev = pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) spin_unlock_bh(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) /* change recs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) for_each_pmc_rcu(in_dev, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) spin_lock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) if (pmc->sfcount[MCAST_EXCLUDE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) type = IGMPV3_BLOCK_OLD_SOURCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) dtype = IGMPV3_ALLOW_NEW_SOURCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) type = IGMPV3_ALLOW_NEW_SOURCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) dtype = IGMPV3_BLOCK_OLD_SOURCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) skb = add_grec(skb, pmc, type, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) /* filter mode changes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) if (pmc->crcount) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) if (pmc->sfmode == MCAST_EXCLUDE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) type = IGMPV3_CHANGE_TO_EXCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) type = IGMPV3_CHANGE_TO_INCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) skb = add_grec(skb, pmc, type, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) pmc->crcount--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) spin_unlock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) (void) igmpv3_sendpack(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) struct iphdr *iph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) struct igmphdr *ih;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) struct rtable *rt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) struct net_device *dev = in_dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) struct net *net = dev_net(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) __be32 group = pmc ? pmc->multiaddr : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) struct flowi4 fl4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) __be32 dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) int hlen, tlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) if (type == IGMPV3_HOST_MEMBERSHIP_REPORT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) return igmpv3_send_report(in_dev, pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) if (ipv4_is_local_multicast(group) && !net->ipv4.sysctl_igmp_llm_reports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) if (type == IGMP_HOST_LEAVE_MESSAGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) dst = IGMP_ALL_ROUTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) dst = group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) rt = ip_route_output_ports(net, &fl4, NULL, dst, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) 0, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) IPPROTO_IGMP, 0, dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) if (IS_ERR(rt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) hlen = LL_RESERVED_SPACE(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) tlen = dev->needed_tailroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) skb = alloc_skb(IGMP_SIZE + hlen + tlen, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) ip_rt_put(rt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) skb->priority = TC_PRIO_CONTROL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) skb_dst_set(skb, &rt->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) skb_reserve(skb, hlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) iph = ip_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) skb_put(skb, sizeof(struct iphdr) + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) iph->version = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) iph->ihl = (sizeof(struct iphdr)+4)>>2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) iph->tos = 0xc0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) iph->frag_off = htons(IP_DF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) iph->ttl = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) iph->daddr = dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) iph->saddr = fl4.saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) iph->protocol = IPPROTO_IGMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) ip_select_ident(net, skb, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) ((u8 *)&iph[1])[0] = IPOPT_RA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) ((u8 *)&iph[1])[1] = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) ((u8 *)&iph[1])[2] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) ((u8 *)&iph[1])[3] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) ih = skb_put(skb, sizeof(struct igmphdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) ih->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) ih->code = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) ih->csum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) ih->group = group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) ih->csum = ip_compute_csum((void *)ih, sizeof(struct igmphdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) return ip_local_out(net, skb->sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) static void igmp_gq_timer_expire(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) struct in_device *in_dev = from_timer(in_dev, t, mr_gq_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) in_dev->mr_gq_running = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) igmpv3_send_report(in_dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) in_dev_put(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) static void igmp_ifc_timer_expire(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) struct in_device *in_dev = from_timer(in_dev, t, mr_ifc_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) igmpv3_send_cr(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) if (in_dev->mr_ifc_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) in_dev->mr_ifc_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) igmp_ifc_start_timer(in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) unsolicited_report_interval(in_dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) in_dev_put(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) static void igmp_ifc_event(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) in_dev->mr_ifc_count = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) igmp_ifc_start_timer(in_dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) static void igmp_timer_expire(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct ip_mc_list *im = from_timer(im, t, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct in_device *in_dev = im->interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) spin_lock(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) im->tm_running = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) if (im->unsolicit_count && --im->unsolicit_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) igmp_start_timer(im, unsolicited_report_interval(in_dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) im->reporter = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) spin_unlock(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) if (IGMP_V1_SEEN(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) else if (IGMP_V2_SEEN(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) ip_ma_put(im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) /* mark EXCLUDE-mode sources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) static int igmp_xmarksources(struct ip_mc_list *pmc, int nsrcs, __be32 *srcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) int i, scount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) scount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) for (psf = pmc->sources; psf; psf = psf->sf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) if (scount == nsrcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) for (i = 0; i < nsrcs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) /* skip inactive filters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) if (psf->sf_count[MCAST_INCLUDE] ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) pmc->sfcount[MCAST_EXCLUDE] !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) psf->sf_count[MCAST_EXCLUDE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) if (srcs[i] == psf->sf_inaddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) scount++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) pmc->gsquery = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) if (scount == nsrcs) /* all sources excluded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) static int igmp_marksources(struct ip_mc_list *pmc, int nsrcs, __be32 *srcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) int i, scount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) if (pmc->sfmode == MCAST_EXCLUDE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) return igmp_xmarksources(pmc, nsrcs, srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) /* mark INCLUDE-mode sources */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) scount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) for (psf = pmc->sources; psf; psf = psf->sf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) if (scount == nsrcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) for (i = 0; i < nsrcs; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (srcs[i] == psf->sf_inaddr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) psf->sf_gsresp = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) scount++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) if (!scount) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) pmc->gsquery = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) pmc->gsquery = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) /* return true if packet was dropped */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) static bool igmp_heard_report(struct in_device *in_dev, __be32 group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) struct ip_mc_list *im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) /* Timers are only set for non-local groups */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) if (group == IGMP_ALL_HOSTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) if (ipv4_is_local_multicast(group) && !net->ipv4.sysctl_igmp_llm_reports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) for_each_pmc_rcu(in_dev, im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) if (im->multiaddr == group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) igmp_stop_timer(im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) /* return true if packet was dropped */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) static bool igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) struct igmphdr *ih = igmp_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) struct igmpv3_query *ih3 = igmpv3_query_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) struct ip_mc_list *im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) __be32 group = ih->group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) int max_delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) int mark = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) if (len == 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) if (ih->code == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) /* Alas, old v1 router presents here. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) max_delay = IGMP_QUERY_RESPONSE_INTERVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) in_dev->mr_v1_seen = jiffies +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) (in_dev->mr_qrv * in_dev->mr_qi) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) in_dev->mr_qri;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) group = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) /* v2 router present */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) max_delay = ih->code*(HZ/IGMP_TIMER_SCALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) in_dev->mr_v2_seen = jiffies +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) (in_dev->mr_qrv * in_dev->mr_qi) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) in_dev->mr_qri;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) /* cancel the interface change timer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) in_dev->mr_ifc_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) if (del_timer(&in_dev->mr_ifc_timer))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) __in_dev_put(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) /* clear deleted report items */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) igmpv3_clear_delrec(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) } else if (len < 12) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) return true; /* ignore bogus packet; freed by caller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) } else if (IGMP_V1_SEEN(in_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) /* This is a v3 query with v1 queriers present */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) max_delay = IGMP_QUERY_RESPONSE_INTERVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) group = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) } else if (IGMP_V2_SEEN(in_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) /* this is a v3 query with v2 queriers present;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) * Interpretation of the max_delay code is problematic here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) * A real v2 host would use ih_code directly, while v3 has a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) * different encoding. We use the v3 encoding as more likely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) * to be intended in a v3 query.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) max_delay = IGMPV3_MRC(ih3->code)*(HZ/IGMP_TIMER_SCALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) if (!max_delay)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) max_delay = 1; /* can't mod w/ 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) } else { /* v3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) if (!pskb_may_pull(skb, sizeof(struct igmpv3_query)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) ih3 = igmpv3_query_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) if (ih3->nsrcs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) if (!pskb_may_pull(skb, sizeof(struct igmpv3_query)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) + ntohs(ih3->nsrcs)*sizeof(__be32)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) ih3 = igmpv3_query_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) max_delay = IGMPV3_MRC(ih3->code)*(HZ/IGMP_TIMER_SCALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) if (!max_delay)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) max_delay = 1; /* can't mod w/ 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) in_dev->mr_maxdelay = max_delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) /* RFC3376, 4.1.6. QRV and 4.1.7. QQIC, when the most recently
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) * received value was zero, use the default or statically
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) * configured value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) in_dev->mr_qrv = ih3->qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) in_dev->mr_qi = IGMPV3_QQIC(ih3->qqic)*HZ ?: IGMP_QUERY_INTERVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) /* RFC3376, 8.3. Query Response Interval:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) * The number of seconds represented by the [Query Response
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) * Interval] must be less than the [Query Interval].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) if (in_dev->mr_qri >= in_dev->mr_qi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) in_dev->mr_qri = (in_dev->mr_qi/HZ - 1)*HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) if (!group) { /* general query */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) if (ih3->nsrcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) return true; /* no sources allowed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) igmp_gq_start_timer(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) /* mark sources to include, if group & source-specific */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) mark = ih3->nsrcs != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) * - Start the timers in all of our membership records
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) * that the query applies to for the interface on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) * which the query arrived excl. those that belong
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) * to a "local" group (224.0.0.X)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) * - For timers already running check if they need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) * be reset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) * - Use the igmp->igmp_code field as the maximum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) * delay possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) for_each_pmc_rcu(in_dev, im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) int changed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) if (group && group != im->multiaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) if (im->multiaddr == IGMP_ALL_HOSTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) if (ipv4_is_local_multicast(im->multiaddr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) !net->ipv4.sysctl_igmp_llm_reports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) spin_lock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) if (im->tm_running)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) im->gsquery = im->gsquery && mark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) im->gsquery = mark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) changed = !im->gsquery ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) if (changed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) igmp_mod_timer(im, max_delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) /* called in rcu_read_lock() section */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) int igmp_rcv(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) /* This basically follows the spec line by line -- see RFC1112 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) struct igmphdr *ih;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) struct net_device *dev = skb->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) int len = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) bool dropped = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) if (netif_is_l3_master(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) dev = dev_get_by_index_rcu(dev_net(dev), IPCB(skb)->iif);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) in_dev = __in_dev_get_rcu(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) if (!pskb_may_pull(skb, sizeof(struct igmphdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) if (skb_checksum_simple_validate(skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) ih = igmp_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) switch (ih->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) case IGMP_HOST_MEMBERSHIP_QUERY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) dropped = igmp_heard_query(in_dev, skb, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) case IGMP_HOST_MEMBERSHIP_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) case IGMPV2_HOST_MEMBERSHIP_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) /* Is it our report looped back? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) if (rt_is_output_route(skb_rtable(skb)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) /* don't rely on MC router hearing unicast reports */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) if (skb->pkt_type == PACKET_MULTICAST ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) skb->pkt_type == PACKET_BROADCAST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) dropped = igmp_heard_report(in_dev, ih->group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) case IGMP_PIM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) #ifdef CONFIG_IP_PIMSM_V1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) return pim_rcv_v1(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) case IGMPV3_HOST_MEMBERSHIP_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) case IGMP_DVMRP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) case IGMP_TRACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) case IGMP_HOST_LEAVE_MESSAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) case IGMP_MTRACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) case IGMP_MTRACE_RESP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) if (dropped)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) consume_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) * Add a filter to a device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) static void ip_mc_filter_add(struct in_device *in_dev, __be32 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) char buf[MAX_ADDR_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) struct net_device *dev = in_dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) /* Checking for IFF_MULTICAST here is WRONG-WRONG-WRONG.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) We will get multicast token leakage, when IFF_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) is changed. This check should be done in ndo_set_rx_mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) routine. Something sort of:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) if (dev->mc_list && dev->flags&IFF_MULTICAST) { do it; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) --ANK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) if (arp_mc_map(addr, buf, dev, 0) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) dev_mc_add(dev, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) * Remove a filter from a device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) static void ip_mc_filter_del(struct in_device *in_dev, __be32 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) char buf[MAX_ADDR_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) struct net_device *dev = in_dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) if (arp_mc_map(addr, buf, dev, 0) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) dev_mc_del(dev, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) * deleted ip_mc_list manipulation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) struct ip_mc_list *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) /* this is an "ip_mc_list" for convenience; only the fields below
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) * are actually used. In particular, the refcnt and users are not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) * used for management of the delete list. Using the same structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) * for deleted items allows change reports to use common code with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) * non-deleted or query-response MCA's.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) pmc = kzalloc(sizeof(*pmc), gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) if (!pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) spin_lock_init(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) spin_lock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) pmc->interface = im->interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) in_dev_hold(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) pmc->multiaddr = im->multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) pmc->sfmode = im->sfmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) if (pmc->sfmode == MCAST_INCLUDE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) pmc->tomb = im->tomb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) pmc->sources = im->sources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) im->tomb = im->sources = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) for (psf = pmc->sources; psf; psf = psf->sf_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) psf->sf_crcount = pmc->crcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) spin_lock_bh(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) pmc->next = in_dev->mc_tomb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) in_dev->mc_tomb = pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) spin_unlock_bh(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) * restore ip_mc_list deleted records
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) struct ip_mc_list *pmc, *pmc_prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) __be32 multiaddr = im->multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) spin_lock_bh(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) pmc_prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) for (pmc = in_dev->mc_tomb; pmc; pmc = pmc->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) if (pmc->multiaddr == multiaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) pmc_prev = pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) if (pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) if (pmc_prev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) pmc_prev->next = pmc->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) in_dev->mc_tomb = pmc->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) spin_unlock_bh(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) spin_lock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) if (pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) im->interface = pmc->interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) if (im->sfmode == MCAST_INCLUDE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) swap(im->tomb, pmc->tomb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) swap(im->sources, pmc->sources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) for (psf = im->sources; psf; psf = psf->sf_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) psf->sf_crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) in_dev_put(pmc->interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) kfree_pmc(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) * flush ip_mc_list deleted records
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) static void igmpv3_clear_delrec(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) struct ip_mc_list *pmc, *nextpmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) spin_lock_bh(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) pmc = in_dev->mc_tomb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) in_dev->mc_tomb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) spin_unlock_bh(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) for (; pmc; pmc = nextpmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) nextpmc = pmc->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) ip_mc_clear_src(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) in_dev_put(pmc->interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) kfree_pmc(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) /* clear dead sources, too */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) for_each_pmc_rcu(in_dev, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) spin_lock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) psf = pmc->tomb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) pmc->tomb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) spin_unlock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) ip_sf_list_clear_all(psf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) static void __igmp_group_dropped(struct ip_mc_list *im, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) struct in_device *in_dev = im->interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) int reporter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) if (im->loaded) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) im->loaded = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) ip_mc_filter_del(in_dev, im->multiaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) if (im->multiaddr == IGMP_ALL_HOSTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) reporter = im->reporter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) igmp_stop_timer(im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) if (!in_dev->dead) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) if (IGMP_V1_SEEN(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) if (IGMP_V2_SEEN(in_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) if (reporter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) /* IGMPv3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) igmpv3_add_delrec(in_dev, im, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) igmp_ifc_event(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) static void igmp_group_dropped(struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) __igmp_group_dropped(im, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) static void igmp_group_added(struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) struct in_device *in_dev = im->interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) if (im->loaded == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) im->loaded = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) ip_mc_filter_add(in_dev, im->multiaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) if (im->multiaddr == IGMP_ALL_HOSTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) if (in_dev->dead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) im->unsolicit_count = net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) spin_lock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) igmp_start_timer(im, IGMP_INITIAL_REPORT_DELAY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) /* else, v3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) /* Based on RFC3376 5.1, for newly added INCLUDE SSM, we should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) * not send filter-mode change record as the mode should be from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) * IN() to IN(A).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) if (im->sfmode == MCAST_EXCLUDE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) igmp_ifc_event(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) * Multicast list managers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) static u32 ip_mc_hash(const struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) return hash_32((__force u32)im->multiaddr, MC_HASH_SZ_LOG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) static void ip_mc_hash_add(struct in_device *in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) struct ip_mc_list __rcu **mc_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) u32 hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) mc_hash = rtnl_dereference(in_dev->mc_hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) if (mc_hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) hash = ip_mc_hash(im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) im->next_hash = mc_hash[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) rcu_assign_pointer(mc_hash[hash], im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) /* do not use a hash table for small number of items */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) if (in_dev->mc_count < 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) mc_hash = kzalloc(sizeof(struct ip_mc_list *) << MC_HASH_SZ_LOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) if (!mc_hash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) for_each_pmc_rtnl(in_dev, im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) hash = ip_mc_hash(im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) im->next_hash = mc_hash[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) RCU_INIT_POINTER(mc_hash[hash], im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) rcu_assign_pointer(in_dev->mc_hash, mc_hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) static void ip_mc_hash_remove(struct in_device *in_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) struct ip_mc_list __rcu **mc_hash = rtnl_dereference(in_dev->mc_hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) struct ip_mc_list *aux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) if (!mc_hash)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) mc_hash += ip_mc_hash(im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) while ((aux = rtnl_dereference(*mc_hash)) != im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) mc_hash = &aux->next_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) *mc_hash = im->next_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) * A socket has joined a multicast group on device dev.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) static void ____ip_mc_inc_group(struct in_device *in_dev, __be32 addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) unsigned int mode, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) struct ip_mc_list *im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) for_each_pmc_rtnl(in_dev, im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) if (im->multiaddr == addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) im->users++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) ip_mc_add_src(in_dev, &addr, mode, 0, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) im = kzalloc(sizeof(*im), gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) if (!im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) im->users = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) im->interface = in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) in_dev_hold(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) im->multiaddr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) /* initial mode is (EX, empty) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) im->sfmode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) im->sfcount[mode] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) refcount_set(&im->refcnt, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) spin_lock_init(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) timer_setup(&im->timer, igmp_timer_expire, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) im->next_rcu = in_dev->mc_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) in_dev->mc_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) rcu_assign_pointer(in_dev->mc_list, im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) ip_mc_hash_add(in_dev, im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) igmpv3_del_delrec(in_dev, im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) igmp_group_added(im);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) if (!in_dev->dead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) ip_rt_multicast_event(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) void __ip_mc_inc_group(struct in_device *in_dev, __be32 addr, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) ____ip_mc_inc_group(in_dev, addr, MCAST_EXCLUDE, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) EXPORT_SYMBOL(__ip_mc_inc_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) void ip_mc_inc_group(struct in_device *in_dev, __be32 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) __ip_mc_inc_group(in_dev, addr, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) EXPORT_SYMBOL(ip_mc_inc_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) static int ip_mc_check_iphdr(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) const struct iphdr *iph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) unsigned int offset = skb_network_offset(skb) + sizeof(*iph);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) if (!pskb_may_pull(skb, offset))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) iph = ip_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) if (iph->version != 4 || ip_hdrlen(skb) < sizeof(*iph))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) offset += ip_hdrlen(skb) - sizeof(*iph);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) if (!pskb_may_pull(skb, offset))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) iph = ip_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) len = skb_network_offset(skb) + ntohs(iph->tot_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) if (skb->len < len || len < offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) skb_set_transport_header(skb, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) static int ip_mc_check_igmp_reportv3(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) unsigned int len = skb_transport_offset(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) len += sizeof(struct igmpv3_report);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) return ip_mc_may_pull(skb, len) ? 0 : -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) static int ip_mc_check_igmp_query(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) unsigned int transport_len = ip_transport_len(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) /* IGMPv{1,2}? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) if (transport_len != sizeof(struct igmphdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) /* or IGMPv3? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) if (transport_len < sizeof(struct igmpv3_query))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) len = skb_transport_offset(skb) + sizeof(struct igmpv3_query);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) if (!ip_mc_may_pull(skb, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) /* RFC2236+RFC3376 (IGMPv2+IGMPv3) require the multicast link layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) * all-systems destination addresses (224.0.0.1) for general queries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) if (!igmp_hdr(skb)->group &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) ip_hdr(skb)->daddr != htonl(INADDR_ALLHOSTS_GROUP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) static int ip_mc_check_igmp_msg(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) switch (igmp_hdr(skb)->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) case IGMP_HOST_LEAVE_MESSAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) case IGMP_HOST_MEMBERSHIP_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) case IGMPV2_HOST_MEMBERSHIP_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) case IGMPV3_HOST_MEMBERSHIP_REPORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) return ip_mc_check_igmp_reportv3(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) case IGMP_HOST_MEMBERSHIP_QUERY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) return ip_mc_check_igmp_query(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) return -ENOMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) static __sum16 ip_mc_validate_checksum(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) return skb_checksum_simple_validate(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) static int ip_mc_check_igmp_csum(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) unsigned int len = skb_transport_offset(skb) + sizeof(struct igmphdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) unsigned int transport_len = ip_transport_len(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) struct sk_buff *skb_chk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) if (!ip_mc_may_pull(skb, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) skb_chk = skb_checksum_trimmed(skb, transport_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) ip_mc_validate_checksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) if (!skb_chk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) if (skb_chk != skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) kfree_skb(skb_chk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) * ip_mc_check_igmp - checks whether this is a sane IGMP packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) * @skb: the skb to validate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) * Checks whether an IPv4 packet is a valid IGMP packet. If so sets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) * skb transport header accordingly and returns zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) * -EINVAL: A broken packet was detected, i.e. it violates some internet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) * standard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) * -ENOMSG: IP header validation succeeded but it is not an IGMP packet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) * -ENOMEM: A memory allocation failure happened.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) * Caller needs to set the skb network header and free any returned skb if it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) * differs from the provided skb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) int ip_mc_check_igmp(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) int ret = ip_mc_check_iphdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) if (ip_hdr(skb)->protocol != IPPROTO_IGMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) return -ENOMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) ret = ip_mc_check_igmp_csum(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) return ip_mc_check_igmp_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) EXPORT_SYMBOL(ip_mc_check_igmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) * Resend IGMP JOIN report; used by netdev notifier.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) static void ip_mc_rejoin_groups(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) struct ip_mc_list *im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) int type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) for_each_pmc_rtnl(in_dev, im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) if (im->multiaddr == IGMP_ALL_HOSTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) if (ipv4_is_local_multicast(im->multiaddr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) !net->ipv4.sysctl_igmp_llm_reports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) /* a failover is happening and switches
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) * must be notified immediately
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) if (IGMP_V1_SEEN(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) type = IGMP_HOST_MEMBERSHIP_REPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) else if (IGMP_V2_SEEN(in_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) type = IGMPV2_HOST_MEMBERSHIP_REPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) type = IGMPV3_HOST_MEMBERSHIP_REPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) igmp_send_report(in_dev, im, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) * A socket has left a multicast group on device dev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) void __ip_mc_dec_group(struct in_device *in_dev, __be32 addr, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) struct ip_mc_list *i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) struct ip_mc_list __rcu **ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) for (ip = &in_dev->mc_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) (i = rtnl_dereference(*ip)) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) ip = &i->next_rcu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) if (i->multiaddr == addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) if (--i->users == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) ip_mc_hash_remove(in_dev, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) *ip = i->next_rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) in_dev->mc_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) __igmp_group_dropped(i, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) ip_mc_clear_src(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) if (!in_dev->dead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) ip_rt_multicast_event(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) ip_ma_put(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) EXPORT_SYMBOL(__ip_mc_dec_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) /* Device changing type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) void ip_mc_unmap(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) struct ip_mc_list *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) for_each_pmc_rtnl(in_dev, pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) igmp_group_dropped(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) void ip_mc_remap(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) struct ip_mc_list *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) for_each_pmc_rtnl(in_dev, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) igmpv3_del_delrec(in_dev, pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) igmp_group_added(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) /* Device going down */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) void ip_mc_down(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) struct ip_mc_list *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) for_each_pmc_rtnl(in_dev, pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) igmp_group_dropped(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) in_dev->mr_ifc_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) if (del_timer(&in_dev->mr_ifc_timer))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) __in_dev_put(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) in_dev->mr_gq_running = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) if (del_timer(&in_dev->mr_gq_timer))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) __in_dev_put(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) ip_mc_dec_group(in_dev, IGMP_ALL_HOSTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) static void ip_mc_reset(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) in_dev->mr_qi = IGMP_QUERY_INTERVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) in_dev->mr_qri = IGMP_QUERY_RESPONSE_INTERVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) in_dev->mr_qrv = net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) static void ip_mc_reset(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) void ip_mc_init_dev(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) timer_setup(&in_dev->mr_gq_timer, igmp_gq_timer_expire, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) timer_setup(&in_dev->mr_ifc_timer, igmp_ifc_timer_expire, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) ip_mc_reset(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) spin_lock_init(&in_dev->mc_tomb_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) /* Device going up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) void ip_mc_up(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) struct ip_mc_list *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) ip_mc_reset(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) ip_mc_inc_group(in_dev, IGMP_ALL_HOSTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) for_each_pmc_rtnl(in_dev, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) igmpv3_del_delrec(in_dev, pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) igmp_group_added(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) * Device is about to be destroyed: clean up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) void ip_mc_destroy_dev(struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) struct ip_mc_list *i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) /* Deactivate timers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) ip_mc_down(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) igmpv3_clear_delrec(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) while ((i = rtnl_dereference(in_dev->mc_list)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) in_dev->mc_list = i->next_rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) in_dev->mc_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) ip_mc_clear_src(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) ip_ma_put(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) /* RTNL is locked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) struct net_device *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) struct in_device *idev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) if (imr->imr_ifindex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) idev = inetdev_by_index(net, imr->imr_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) return idev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) if (imr->imr_address.s_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) dev = __ip_dev_find(net, imr->imr_address.s_addr, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) if (!dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) struct rtable *rt = ip_route_output(net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) imr->imr_multiaddr.s_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) 0, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) if (!IS_ERR(rt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) dev = rt->dst.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) ip_rt_put(rt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) imr->imr_ifindex = dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) idev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) return idev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) * Join a socket to a group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) __be32 *psfsrc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) struct ip_sf_list *psf, *psf_prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) int rv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) psf_prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) for (psf = pmc->sources; psf; psf = psf->sf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) if (psf->sf_inaddr == *psfsrc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) psf_prev = psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) if (!psf || psf->sf_count[sfmode] == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) /* source filter not found, or count wrong => bug */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) return -ESRCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) psf->sf_count[sfmode]--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) if (psf->sf_count[sfmode] == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) ip_rt_multicast_event(pmc->interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) struct in_device *in_dev = pmc->interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) /* no more filters for this source */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) if (psf_prev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) psf_prev->sf_next = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) pmc->sources = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) if (psf->sf_oldin &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) !IGMP_V1_SEEN(in_dev) && !IGMP_V2_SEEN(in_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) psf->sf_crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) psf->sf_next = pmc->tomb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) pmc->tomb = psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) rv = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) kfree(psf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) #ifndef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) #define igmp_ifc_event(x) do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) static int ip_mc_del_src(struct in_device *in_dev, __be32 *pmca, int sfmode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) int sfcount, __be32 *psfsrc, int delta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) struct ip_mc_list *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) int changerec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) int i, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) for_each_pmc_rcu(in_dev, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) if (*pmca == pmc->multiaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) if (!pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) /* MCA not found?? bug */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) return -ESRCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) spin_lock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) sf_markstate(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) if (!delta) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) if (!pmc->sfcount[sfmode])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) pmc->sfcount[sfmode]--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) for (i = 0; i < sfcount; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) int rv = ip_mc_del1_src(pmc, sfmode, &psfsrc[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) changerec |= rv > 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) if (!err && rv < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) err = rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) if (pmc->sfmode == MCAST_EXCLUDE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) pmc->sfcount[MCAST_EXCLUDE] == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) pmc->sfcount[MCAST_INCLUDE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) struct net *net = dev_net(in_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) /* filter mode change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) pmc->sfmode = MCAST_INCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) in_dev->mr_ifc_count = pmc->crcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) for (psf = pmc->sources; psf; psf = psf->sf_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) psf->sf_crcount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) igmp_ifc_event(pmc->interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) } else if (sf_setstate(pmc) || changerec) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) igmp_ifc_event(pmc->interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) spin_unlock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) * Add multicast single-source filter to the interface list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) static int ip_mc_add1_src(struct ip_mc_list *pmc, int sfmode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) __be32 *psfsrc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) struct ip_sf_list *psf, *psf_prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) psf_prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) for (psf = pmc->sources; psf; psf = psf->sf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) if (psf->sf_inaddr == *psfsrc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) psf_prev = psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) if (!psf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) if (!psf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) return -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) psf->sf_inaddr = *psfsrc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) if (psf_prev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) psf_prev->sf_next = psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) pmc->sources = psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) psf->sf_count[sfmode]++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) if (psf->sf_count[sfmode] == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) ip_rt_multicast_event(pmc->interface);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) static void sf_markstate(struct ip_mc_list *pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) int mca_xcount = pmc->sfcount[MCAST_EXCLUDE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) for (psf = pmc->sources; psf; psf = psf->sf_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) if (pmc->sfcount[MCAST_EXCLUDE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) psf->sf_oldin = mca_xcount ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) psf->sf_count[MCAST_EXCLUDE] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) !psf->sf_count[MCAST_INCLUDE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) static int sf_setstate(struct ip_mc_list *pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) struct ip_sf_list *psf, *dpsf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) int mca_xcount = pmc->sfcount[MCAST_EXCLUDE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) int qrv = pmc->interface->mr_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) int new_in, rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) rv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) for (psf = pmc->sources; psf; psf = psf->sf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) if (pmc->sfcount[MCAST_EXCLUDE]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) !psf->sf_count[MCAST_INCLUDE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) new_in = psf->sf_count[MCAST_INCLUDE] != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) if (new_in) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) if (!psf->sf_oldin) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) struct ip_sf_list *prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) for (dpsf = pmc->tomb; dpsf; dpsf = dpsf->sf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) if (dpsf->sf_inaddr == psf->sf_inaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) prev = dpsf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) if (dpsf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) if (prev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) prev->sf_next = dpsf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) pmc->tomb = dpsf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) kfree(dpsf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) psf->sf_crcount = qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) rv++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) } else if (psf->sf_oldin) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) psf->sf_crcount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) * add or update "delete" records if an active filter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) * is now inactive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) for (dpsf = pmc->tomb; dpsf; dpsf = dpsf->sf_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) if (dpsf->sf_inaddr == psf->sf_inaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) if (!dpsf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) if (!dpsf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) *dpsf = *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) /* pmc->lock held by callers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) dpsf->sf_next = pmc->tomb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) pmc->tomb = dpsf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) dpsf->sf_crcount = qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) rv++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) * Add multicast source filter list to the interface list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) int sfcount, __be32 *psfsrc, int delta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) struct ip_mc_list *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) int isexclude;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) int i, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) for_each_pmc_rcu(in_dev, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) if (*pmca == pmc->multiaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) if (!pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) /* MCA not found?? bug */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) return -ESRCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) spin_lock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) sf_markstate(pmc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) isexclude = pmc->sfmode == MCAST_EXCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) if (!delta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) pmc->sfcount[sfmode]++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) for (i = 0; i < sfcount; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) err = ip_mc_add1_src(pmc, sfmode, &psfsrc[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) int j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) if (!delta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) pmc->sfcount[sfmode]--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) for (j = 0; j < i; j++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) (void) ip_mc_del1_src(pmc, sfmode, &psfsrc[j]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) } else if (isexclude != (pmc->sfcount[MCAST_EXCLUDE] != 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) struct net *net = dev_net(pmc->interface->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) in_dev = pmc->interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) /* filter mode change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) if (pmc->sfcount[MCAST_EXCLUDE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) pmc->sfmode = MCAST_EXCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) else if (pmc->sfcount[MCAST_INCLUDE])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) pmc->sfmode = MCAST_INCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) /* else no filters; keep old mode for reports */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) pmc->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) in_dev->mr_ifc_count = pmc->crcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) for (psf = pmc->sources; psf; psf = psf->sf_next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) psf->sf_crcount = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) igmp_ifc_event(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) } else if (sf_setstate(pmc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) igmp_ifc_event(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) spin_unlock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) static void ip_mc_clear_src(struct ip_mc_list *pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) struct ip_sf_list *tomb, *sources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) spin_lock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) tomb = pmc->tomb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) pmc->tomb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) sources = pmc->sources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) pmc->sources = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) pmc->sfmode = MCAST_EXCLUDE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) pmc->sfcount[MCAST_INCLUDE] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) pmc->sfcount[MCAST_EXCLUDE] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) spin_unlock_bh(&pmc->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) ip_sf_list_clear_all(tomb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) ip_sf_list_clear_all(sources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) /* Join a multicast group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) static int __ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) unsigned int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) __be32 addr = imr->imr_multiaddr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) struct ip_mc_socklist *iml, *i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) struct inet_sock *inet = inet_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) int ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) if (!ipv4_is_multicast(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) in_dev = ip_mc_find_dev(net, imr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) err = -EADDRINUSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) ifindex = imr->imr_ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) for_each_pmc_rtnl(inet, i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) if (i->multi.imr_multiaddr.s_addr == addr &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) i->multi.imr_ifindex == ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187) err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) if (count >= net->ipv4.sysctl_igmp_max_memberships)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) iml = sock_kmalloc(sk, sizeof(*iml), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) if (!iml)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) memcpy(&iml->multi, imr, sizeof(*imr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) iml->next_rcu = inet->mc_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) iml->sflist = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197) iml->sfmode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) rcu_assign_pointer(inet->mc_list, iml);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) ____ip_mc_inc_group(in_dev, addr, mode, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) /* Join ASM (Any-Source Multicast) group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207) int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) return __ip_mc_join_group(sk, imr, MCAST_EXCLUDE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211) EXPORT_SYMBOL(ip_mc_join_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) /* Join SSM (Source-Specific Multicast) group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) int ip_mc_join_group_ssm(struct sock *sk, struct ip_mreqn *imr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216) unsigned int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) return __ip_mc_join_group(sk, imr, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) static int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222) struct in_device *in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) struct ip_sf_socklist *psf = rtnl_dereference(iml->sflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) if (!psf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) /* any-source empty exclude case */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229) return ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230) iml->sfmode, 0, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232) err = ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) iml->sfmode, psf->sl_count, psf->sl_addr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234) RCU_INIT_POINTER(iml->sflist, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235) /* decrease mem now to avoid the memleak warning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) atomic_sub(IP_SFLSIZE(psf->sl_max), &sk->sk_omem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) kfree_rcu(psf, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243) struct inet_sock *inet = inet_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) struct ip_mc_socklist *iml;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245) struct ip_mc_socklist __rcu **imlp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) __be32 group = imr->imr_multiaddr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) u32 ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250) int ret = -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) in_dev = ip_mc_find_dev(net, imr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) if (!imr->imr_ifindex && !imr->imr_address.s_addr && !in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) ifindex = imr->imr_ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) for (imlp = &inet->mc_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261) (iml = rtnl_dereference(*imlp)) != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) imlp = &iml->next_rcu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) if (iml->multi.imr_multiaddr.s_addr != group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265) if (ifindex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) if (iml->multi.imr_ifindex != ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268) } else if (imr->imr_address.s_addr && imr->imr_address.s_addr !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) iml->multi.imr_address.s_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) (void) ip_mc_leave_src(sk, iml, in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) *imlp = iml->next_rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276) if (in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) ip_mc_dec_group(in_dev, group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) /* decrease mem now to avoid the memleak warning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) atomic_sub(sizeof(*iml), &sk->sk_omem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281) kfree_rcu(iml, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) EXPORT_SYMBOL(ip_mc_leave_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) int ip_mc_source(int add, int omode, struct sock *sk, struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) ip_mreq_source *mreqs, int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) struct ip_mreqn imr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) __be32 addr = mreqs->imr_multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295) struct ip_mc_socklist *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) struct in_device *in_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) struct inet_sock *inet = inet_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) struct ip_sf_socklist *psl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) int leavegroup = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) int i, j, rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) if (!ipv4_is_multicast(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308) imr.imr_multiaddr.s_addr = mreqs->imr_multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) imr.imr_address.s_addr = mreqs->imr_interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) imr.imr_ifindex = ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311) in_dev = ip_mc_find_dev(net, &imr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) err = -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319) for_each_pmc_rtnl(inet, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320) if ((pmc->multi.imr_multiaddr.s_addr ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321) imr.imr_multiaddr.s_addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322) (pmc->multi.imr_ifindex == imr.imr_ifindex))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) if (!pmc) { /* must have a prior join */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329) /* if a source filter was set, must be the same mode as before */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2330) if (pmc->sflist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2331) if (pmc->sfmode != omode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2332) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2333) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2335) } else if (pmc->sfmode != omode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2336) /* allow mode switches for empty-set filters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2337) ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 0, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2338) ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, pmc->sfmode, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2339) NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2340) pmc->sfmode = omode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2343) psl = rtnl_dereference(pmc->sflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2344) if (!add) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2345) if (!psl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2346) goto done; /* err = -EADDRNOTAVAIL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2347) rv = !0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2348) for (i = 0; i < psl->sl_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2349) rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2350) sizeof(__be32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2351) if (rv == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2352) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2354) if (rv) /* source not found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2355) goto done; /* err = -EADDRNOTAVAIL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2357) /* special case - (INCLUDE, empty) == LEAVE_GROUP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2358) if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2359) leavegroup = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2360) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2363) /* update the interface filter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2364) ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, omode, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2365) &mreqs->imr_sourceaddr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2367) for (j = i+1; j < psl->sl_count; j++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2368) psl->sl_addr[j-1] = psl->sl_addr[j];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2369) psl->sl_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2370) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2371) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2373) /* else, add a new source to the filter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2375) if (psl && psl->sl_count >= net->ipv4.sysctl_igmp_max_msf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2376) err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2377) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2379) if (!psl || psl->sl_count == psl->sl_max) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2380) struct ip_sf_socklist *newpsl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2381) int count = IP_SFBLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2383) if (psl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2384) count += psl->sl_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2385) newpsl = sock_kmalloc(sk, IP_SFLSIZE(count), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2386) if (!newpsl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2387) err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2388) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2390) newpsl->sl_max = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2391) newpsl->sl_count = count - IP_SFBLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2392) if (psl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2393) for (i = 0; i < psl->sl_count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2394) newpsl->sl_addr[i] = psl->sl_addr[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2395) /* decrease mem now to avoid the memleak warning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2396) atomic_sub(IP_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2397) kfree_rcu(psl, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2399) rcu_assign_pointer(pmc->sflist, newpsl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2400) psl = newpsl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2402) rv = 1; /* > 0 for insert logic below if sl_count is 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2403) for (i = 0; i < psl->sl_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2404) rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2405) sizeof(__be32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2406) if (rv == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2407) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2409) if (rv == 0) /* address already there is an error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2410) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2411) for (j = psl->sl_count-1; j >= i; j--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2412) psl->sl_addr[j+1] = psl->sl_addr[j];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2413) psl->sl_addr[i] = mreqs->imr_sourceaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2414) psl->sl_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2415) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2416) /* update the interface list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2417) ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2418) &mreqs->imr_sourceaddr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2419) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2420) if (leavegroup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2421) err = ip_mc_leave_group(sk, &imr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2422) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2425) int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2427) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2428) struct ip_mreqn imr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2429) __be32 addr = msf->imsf_multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2430) struct ip_mc_socklist *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2431) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2432) struct inet_sock *inet = inet_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2433) struct ip_sf_socklist *newpsl, *psl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2434) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2435) int leavegroup = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2437) if (!ipv4_is_multicast(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2438) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2439) if (msf->imsf_fmode != MCAST_INCLUDE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2440) msf->imsf_fmode != MCAST_EXCLUDE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2441) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2443) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2445) imr.imr_multiaddr.s_addr = msf->imsf_multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2446) imr.imr_address.s_addr = msf->imsf_interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2447) imr.imr_ifindex = ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2448) in_dev = ip_mc_find_dev(net, &imr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2450) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2451) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2452) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2455) /* special case - (INCLUDE, empty) == LEAVE_GROUP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2456) if (msf->imsf_fmode == MCAST_INCLUDE && msf->imsf_numsrc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2457) leavegroup = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2458) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2461) for_each_pmc_rtnl(inet, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2462) if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2463) pmc->multi.imr_ifindex == imr.imr_ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2464) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2466) if (!pmc) { /* must have a prior join */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2467) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2468) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2470) if (msf->imsf_numsrc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2471) newpsl = sock_kmalloc(sk, IP_SFLSIZE(msf->imsf_numsrc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2472) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2473) if (!newpsl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2474) err = -ENOBUFS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2475) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2477) newpsl->sl_max = newpsl->sl_count = msf->imsf_numsrc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2478) memcpy(newpsl->sl_addr, msf->imsf_slist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2479) msf->imsf_numsrc * sizeof(msf->imsf_slist[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2480) err = ip_mc_add_src(in_dev, &msf->imsf_multiaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2481) msf->imsf_fmode, newpsl->sl_count, newpsl->sl_addr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2482) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2483) sock_kfree_s(sk, newpsl, IP_SFLSIZE(newpsl->sl_max));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2484) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2486) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2487) newpsl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2488) (void) ip_mc_add_src(in_dev, &msf->imsf_multiaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2489) msf->imsf_fmode, 0, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2491) psl = rtnl_dereference(pmc->sflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2492) if (psl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2493) (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2494) psl->sl_count, psl->sl_addr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2495) /* decrease mem now to avoid the memleak warning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2496) atomic_sub(IP_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2497) kfree_rcu(psl, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2498) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2499) (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2500) 0, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2501) rcu_assign_pointer(pmc->sflist, newpsl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2502) pmc->sfmode = msf->imsf_fmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2503) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2504) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2505) if (leavegroup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2506) err = ip_mc_leave_group(sk, &imr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2507) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2510) int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2511) struct ip_msfilter __user *optval, int __user *optlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2512) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2513) int err, len, count, copycount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2514) struct ip_mreqn imr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2515) __be32 addr = msf->imsf_multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2516) struct ip_mc_socklist *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2517) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2518) struct inet_sock *inet = inet_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2519) struct ip_sf_socklist *psl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2520) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2522) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2524) if (!ipv4_is_multicast(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2525) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2527) imr.imr_multiaddr.s_addr = msf->imsf_multiaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2528) imr.imr_address.s_addr = msf->imsf_interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2529) imr.imr_ifindex = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2530) in_dev = ip_mc_find_dev(net, &imr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2532) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2533) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2534) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2536) err = -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2538) for_each_pmc_rtnl(inet, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2539) if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2540) pmc->multi.imr_ifindex == imr.imr_ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2541) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2543) if (!pmc) /* must have a prior join */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2544) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2545) msf->imsf_fmode = pmc->sfmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2546) psl = rtnl_dereference(pmc->sflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2547) if (!psl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2548) len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2549) count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2550) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2551) count = psl->sl_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2553) copycount = count < msf->imsf_numsrc ? count : msf->imsf_numsrc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2554) len = copycount * sizeof(psl->sl_addr[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2555) msf->imsf_numsrc = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2556) if (put_user(IP_MSFILTER_SIZE(copycount), optlen) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2557) copy_to_user(optval, msf, IP_MSFILTER_SIZE(0))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2558) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2560) if (len &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2561) copy_to_user(&optval->imsf_slist[0], psl->sl_addr, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2562) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2563) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2564) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2565) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2566) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2568) int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2569) struct sockaddr_storage __user *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2570) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2571) int i, count, copycount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2572) struct sockaddr_in *psin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2573) __be32 addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2574) struct ip_mc_socklist *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2575) struct inet_sock *inet = inet_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2576) struct ip_sf_socklist *psl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2578) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2580) psin = (struct sockaddr_in *)&gsf->gf_group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2581) if (psin->sin_family != AF_INET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2582) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2583) addr = psin->sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2584) if (!ipv4_is_multicast(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2585) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2587) for_each_pmc_rtnl(inet, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2588) if (pmc->multi.imr_multiaddr.s_addr == addr &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2589) pmc->multi.imr_ifindex == gsf->gf_interface)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2590) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2592) if (!pmc) /* must have a prior join */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2593) return -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2594) gsf->gf_fmode = pmc->sfmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2595) psl = rtnl_dereference(pmc->sflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2596) count = psl ? psl->sl_count : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2597) copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2598) gsf->gf_numsrc = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2599) for (i = 0; i < copycount; i++, p++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2600) struct sockaddr_storage ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2602) psin = (struct sockaddr_in *)&ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2603) memset(&ss, 0, sizeof(ss));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2604) psin->sin_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2605) psin->sin_addr.s_addr = psl->sl_addr[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2606) if (copy_to_user(p, &ss, sizeof(ss)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2607) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2608) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2609) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2612) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2613) * check if a multicast source filter allows delivery for a given <src,dst,intf>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2614) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2615) int ip_mc_sf_allow(struct sock *sk, __be32 loc_addr, __be32 rmt_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2616) int dif, int sdif)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2617) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2618) struct inet_sock *inet = inet_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2619) struct ip_mc_socklist *pmc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2620) struct ip_sf_socklist *psl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2621) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2622) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2624) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2625) if (!ipv4_is_multicast(loc_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2626) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2628) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2629) for_each_pmc_rcu(inet, pmc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2630) if (pmc->multi.imr_multiaddr.s_addr == loc_addr &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2631) (pmc->multi.imr_ifindex == dif ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2632) (sdif && pmc->multi.imr_ifindex == sdif)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2633) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2635) ret = inet->mc_all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2636) if (!pmc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2637) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2638) psl = rcu_dereference(pmc->sflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2639) ret = (pmc->sfmode == MCAST_EXCLUDE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2640) if (!psl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2641) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2643) for (i = 0; i < psl->sl_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2644) if (psl->sl_addr[i] == rmt_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2645) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2647) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2648) if (pmc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2649) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2650) if (pmc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2651) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2652) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2653) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2654) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2655) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2656) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2659) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2660) * A socket is closing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2661) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2663) void ip_mc_drop_socket(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2664) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2665) struct inet_sock *inet = inet_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2666) struct ip_mc_socklist *iml;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2667) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2669) if (!inet->mc_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2670) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2672) rtnl_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2673) while ((iml = rtnl_dereference(inet->mc_list)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2674) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2676) inet->mc_list = iml->next_rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2677) in_dev = inetdev_by_index(net, iml->multi.imr_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2678) (void) ip_mc_leave_src(sk, iml, in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2679) if (in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2680) ip_mc_dec_group(in_dev, iml->multi.imr_multiaddr.s_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2681) /* decrease mem now to avoid the memleak warning */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2682) atomic_sub(sizeof(*iml), &sk->sk_omem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2683) kfree_rcu(iml, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2685) rtnl_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2688) /* called with rcu_read_lock() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2689) int ip_check_mc_rcu(struct in_device *in_dev, __be32 mc_addr, __be32 src_addr, u8 proto)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2690) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2691) struct ip_mc_list *im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2692) struct ip_mc_list __rcu **mc_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2693) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2694) int rv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2696) mc_hash = rcu_dereference(in_dev->mc_hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2697) if (mc_hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2698) u32 hash = hash_32((__force u32)mc_addr, MC_HASH_SZ_LOG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2700) for (im = rcu_dereference(mc_hash[hash]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2701) im != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2702) im = rcu_dereference(im->next_hash)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2703) if (im->multiaddr == mc_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2704) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2705) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2706) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2707) for_each_pmc_rcu(in_dev, im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2708) if (im->multiaddr == mc_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2709) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2710) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2711) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2712) if (im && proto == IPPROTO_IGMP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2713) rv = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2714) } else if (im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2715) if (src_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2716) spin_lock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2717) for (psf = im->sources; psf; psf = psf->sf_next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2718) if (psf->sf_inaddr == src_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2719) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2721) if (psf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2722) rv = psf->sf_count[MCAST_INCLUDE] ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2723) psf->sf_count[MCAST_EXCLUDE] !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2724) im->sfcount[MCAST_EXCLUDE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2725) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2726) rv = im->sfcount[MCAST_EXCLUDE] != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2727) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2728) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2729) rv = 1; /* unspecified source; tentatively allow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2730) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2731) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2732) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2734) #if defined(CONFIG_PROC_FS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2735) struct igmp_mc_iter_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2736) struct seq_net_private p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2737) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2738) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2739) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2741) #define igmp_mc_seq_private(seq) ((struct igmp_mc_iter_state *)(seq)->private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2743) static inline struct ip_mc_list *igmp_mc_get_first(struct seq_file *seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2744) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2745) struct net *net = seq_file_net(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2746) struct ip_mc_list *im = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2747) struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2749) state->in_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2750) for_each_netdev_rcu(net, state->dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2751) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2753) in_dev = __in_dev_get_rcu(state->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2754) if (!in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2755) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2756) im = rcu_dereference(in_dev->mc_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2757) if (im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2758) state->in_dev = in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2759) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2760) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2761) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2762) return im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2765) static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2766) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2767) struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2769) im = rcu_dereference(im->next_rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2770) while (!im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2771) state->dev = next_net_device_rcu(state->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2772) if (!state->dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2773) state->in_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2774) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2775) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2776) state->in_dev = __in_dev_get_rcu(state->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2777) if (!state->in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2778) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2779) im = rcu_dereference(state->in_dev->mc_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2780) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2781) return im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2784) static struct ip_mc_list *igmp_mc_get_idx(struct seq_file *seq, loff_t pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2785) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2786) struct ip_mc_list *im = igmp_mc_get_first(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2787) if (im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2788) while (pos && (im = igmp_mc_get_next(seq, im)) != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2789) --pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2790) return pos ? NULL : im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2791) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2793) static void *igmp_mc_seq_start(struct seq_file *seq, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2794) __acquires(rcu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2795) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2796) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2797) return *pos ? igmp_mc_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2800) static void *igmp_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2801) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2802) struct ip_mc_list *im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2803) if (v == SEQ_START_TOKEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2804) im = igmp_mc_get_first(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2805) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2806) im = igmp_mc_get_next(seq, v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2807) ++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2808) return im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2809) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2811) static void igmp_mc_seq_stop(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2812) __releases(rcu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2813) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2814) struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2816) state->in_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2817) state->dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2818) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2819) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2821) static int igmp_mc_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2822) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2823) if (v == SEQ_START_TOKEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2824) seq_puts(seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2825) "Idx\tDevice : Count Querier\tGroup Users Timer\tReporter\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2826) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2827) struct ip_mc_list *im = (struct ip_mc_list *)v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2828) struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2829) char *querier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2830) long delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2832) #ifdef CONFIG_IP_MULTICAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2833) querier = IGMP_V1_SEEN(state->in_dev) ? "V1" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2834) IGMP_V2_SEEN(state->in_dev) ? "V2" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2835) "V3";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2836) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2837) querier = "NONE";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2838) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2840) if (rcu_access_pointer(state->in_dev->mc_list) == im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2841) seq_printf(seq, "%d\t%-10s: %5d %7s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2842) state->dev->ifindex, state->dev->name, state->in_dev->mc_count, querier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2843) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2845) delta = im->timer.expires - jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2846) seq_printf(seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2847) "\t\t\t\t%08X %5d %d:%08lX\t\t%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2848) im->multiaddr, im->users,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2849) im->tm_running,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2850) im->tm_running ? jiffies_delta_to_clock_t(delta) : 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2851) im->reporter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2853) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2854) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2856) static const struct seq_operations igmp_mc_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2857) .start = igmp_mc_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2858) .next = igmp_mc_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2859) .stop = igmp_mc_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2860) .show = igmp_mc_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2861) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2863) struct igmp_mcf_iter_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2864) struct seq_net_private p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2865) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2866) struct in_device *idev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2867) struct ip_mc_list *im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2868) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2870) #define igmp_mcf_seq_private(seq) ((struct igmp_mcf_iter_state *)(seq)->private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2872) static inline struct ip_sf_list *igmp_mcf_get_first(struct seq_file *seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2873) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2874) struct net *net = seq_file_net(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2875) struct ip_sf_list *psf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2876) struct ip_mc_list *im = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2877) struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2879) state->idev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2880) state->im = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2881) for_each_netdev_rcu(net, state->dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2882) struct in_device *idev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2883) idev = __in_dev_get_rcu(state->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2884) if (unlikely(!idev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2885) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2886) im = rcu_dereference(idev->mc_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2887) if (likely(im)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2888) spin_lock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2889) psf = im->sources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2890) if (likely(psf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2891) state->im = im;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2892) state->idev = idev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2893) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2895) spin_unlock_bh(&im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2896) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2898) return psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2901) static struct ip_sf_list *igmp_mcf_get_next(struct seq_file *seq, struct ip_sf_list *psf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2902) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2903) struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2905) psf = psf->sf_next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2906) while (!psf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2907) spin_unlock_bh(&state->im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2908) state->im = state->im->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2909) while (!state->im) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2910) state->dev = next_net_device_rcu(state->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2911) if (!state->dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2912) state->idev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2913) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2914) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2915) state->idev = __in_dev_get_rcu(state->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2916) if (!state->idev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2917) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2918) state->im = rcu_dereference(state->idev->mc_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2919) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2920) if (!state->im)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2921) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2922) spin_lock_bh(&state->im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2923) psf = state->im->sources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2924) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2925) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2926) return psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2929) static struct ip_sf_list *igmp_mcf_get_idx(struct seq_file *seq, loff_t pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2930) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2931) struct ip_sf_list *psf = igmp_mcf_get_first(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2932) if (psf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2933) while (pos && (psf = igmp_mcf_get_next(seq, psf)) != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2934) --pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2935) return pos ? NULL : psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2936) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2938) static void *igmp_mcf_seq_start(struct seq_file *seq, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2939) __acquires(rcu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2940) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2941) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2942) return *pos ? igmp_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2945) static void *igmp_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2946) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2947) struct ip_sf_list *psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2948) if (v == SEQ_START_TOKEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2949) psf = igmp_mcf_get_first(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2950) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2951) psf = igmp_mcf_get_next(seq, v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2952) ++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2953) return psf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2954) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2955)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2956) static void igmp_mcf_seq_stop(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2957) __releases(rcu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2958) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2959) struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2960) if (likely(state->im)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2961) spin_unlock_bh(&state->im->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2962) state->im = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2964) state->idev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2965) state->dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2966) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2967) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2969) static int igmp_mcf_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2970) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2971) struct ip_sf_list *psf = (struct ip_sf_list *)v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2972) struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2974) if (v == SEQ_START_TOKEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2975) seq_puts(seq, "Idx Device MCA SRC INC EXC\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2976) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2977) seq_printf(seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2978) "%3d %6.6s 0x%08x "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2979) "0x%08x %6lu %6lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2980) state->dev->ifindex, state->dev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2981) ntohl(state->im->multiaddr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2982) ntohl(psf->sf_inaddr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2983) psf->sf_count[MCAST_INCLUDE],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2984) psf->sf_count[MCAST_EXCLUDE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2985) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2986) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2987) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2989) static const struct seq_operations igmp_mcf_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2990) .start = igmp_mcf_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2991) .next = igmp_mcf_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2992) .stop = igmp_mcf_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2993) .show = igmp_mcf_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2994) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2996) static int __net_init igmp_net_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2997) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2998) struct proc_dir_entry *pde;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2999) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3001) pde = proc_create_net("igmp", 0444, net->proc_net, &igmp_mc_seq_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3002) sizeof(struct igmp_mc_iter_state));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3003) if (!pde)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3004) goto out_igmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3005) pde = proc_create_net("mcfilter", 0444, net->proc_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3006) &igmp_mcf_seq_ops, sizeof(struct igmp_mcf_iter_state));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3007) if (!pde)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3008) goto out_mcfilter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3009) err = inet_ctl_sock_create(&net->ipv4.mc_autojoin_sk, AF_INET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3010) SOCK_DGRAM, 0, net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3011) if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3012) pr_err("Failed to initialize the IGMP autojoin socket (err %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3013) err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3014) goto out_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3015) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3017) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3019) out_sock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3020) remove_proc_entry("mcfilter", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3021) out_mcfilter:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3022) remove_proc_entry("igmp", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3023) out_igmp:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3024) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3025) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3027) static void __net_exit igmp_net_exit(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3028) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3029) remove_proc_entry("mcfilter", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3030) remove_proc_entry("igmp", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3031) inet_ctl_sock_destroy(net->ipv4.mc_autojoin_sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3032) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3034) static struct pernet_operations igmp_net_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3035) .init = igmp_net_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3036) .exit = igmp_net_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3037) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3038) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3040) static int igmp_netdev_event(struct notifier_block *this,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3041) unsigned long event, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3042) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3043) struct net_device *dev = netdev_notifier_info_to_dev(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3044) struct in_device *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3046) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3047) case NETDEV_RESEND_IGMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3048) in_dev = __in_dev_get_rtnl(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3049) if (in_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3050) ip_mc_rejoin_groups(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3051) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3052) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3053) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3054) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3055) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3056) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3058) static struct notifier_block igmp_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3059) .notifier_call = igmp_netdev_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3060) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3062) int __init igmp_mc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3063) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3064) #if defined(CONFIG_PROC_FS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3065) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3067) err = register_pernet_subsys(&igmp_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3068) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3069) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3070) err = register_netdevice_notifier(&igmp_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3071) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3072) goto reg_notif_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3073) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3075) reg_notif_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3076) unregister_pernet_subsys(&igmp_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3077) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3078) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3079) return register_netdevice_notifier(&igmp_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3080) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3081) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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