^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) /** -*- linux-c -*- ***********************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Linux PPP over Ethernet (PPPoX/PPPoE) Sockets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * PPPoX --- Generic PPP encapsulation socket family
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * PPPoE --- PPP over Ethernet (RFC 2516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Version: 0.7.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * 070228 : Fix to allow multiple sessions with same remote MAC and same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * session id by including the local device ifindex in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * tuple identifying a session. This also ensures packets can't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * be injected into a session from interfaces other than the one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * specified by userspace. Florian Zumbiehl <florz@florz.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * (Oh, BTW, this one is YYMMDD, in case you were wondering ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * 220102 : Fix module use count on failure in pppoe_create, pppox_sk -acme
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * 030700 : Fixed connect logic to allow for disconnect.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * 270700 : Fixed potential SMP problems; we must protect against
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * simultaneous invocation of ppp_input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * and ppp_unregister_channel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * 040800 : Respect reference count mechanisms on net-devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * 200800 : fix kfree(skb) in pppoe_rcv (acme)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Module reference count is decremented in the right spot now,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * guards against sock_put not actually freeing the sk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * in pppoe_release.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * 051000 : Initialization cleanup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * 111100 : Fix recvmsg.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * 050101 : Fix PADT procesing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * 140501 : Use pppoe_rcv_core to handle all backlog. (Alexey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * 170701 : Do not lock_sock with rwlock held. (DaveM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Ignore discovery frames if user has socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * locked. (DaveM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Ignore return value of dev_queue_xmit in __pppoe_xmit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * or else we may kfree an SKB twice. (DaveM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * 190701 : When doing copies of skb's in __pppoe_xmit, always delete
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * the original skb that was passed in on success, never on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * failure. Delete the copy of the skb on failure to avoid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * a memory leak.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * 081001 : Misc. cleanup (licence string, non-blocking, prevent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * reference of device on close).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * 121301 : New ppp channels interface; cannot unregister a channel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * from interrupts. Thus, we mark the socket as a ZOMBIE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * and do the unregistration later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * 081002 : seq_file support for proc stuff -acme
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * 111602 : Merge all 2.4 fixes into 2.5/2.6 tree. Label 2.5/2.6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * as version 0.7. Spacing cleanup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * Author: Michal Ostrowski <mostrows@speakeasy.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * Contributors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * David S. Miller (davem@redhat.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * License:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #include <linux/net.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #include <linux/inetdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #include <linux/if_ether.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #include <linux/if_pppox.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #include <linux/ppp_channel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #include <linux/ppp_defs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #include <linux/ppp-ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #include <linux/notifier.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #include <linux/nsproxy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #include <net/netns/generic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #define PPPOE_HASH_BITS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define PPPOE_HASH_SIZE (1 << PPPOE_HASH_BITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define PPPOE_HASH_MASK (PPPOE_HASH_SIZE - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static const struct proto_ops pppoe_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static const struct ppp_channel_ops pppoe_chan_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /* per-net private data for this module */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static unsigned int pppoe_net_id __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct pppoe_net {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * we could use _single_ hash table for all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * nets by injecting net id into the hash but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * it would increase hash chains and add
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * a few additional math comparations messy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * as well, moreover in case of SMP less locking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * controversy here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct pppox_sock *hash_table[PPPOE_HASH_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) rwlock_t hash_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * PPPoE could be in the following stages:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * 1) Discovery stage (to obtain remote MAC and Session ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * 2) Session stage (MAC and SID are known)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * Ethernet frames have a special tag for this but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * we use simpler approach based on session id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static inline bool stage_session(__be16 sid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return sid != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static inline struct pppoe_net *pppoe_pernet(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return net_generic(net, pppoe_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static inline int cmp_2_addr(struct pppoe_addr *a, struct pppoe_addr *b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return a->sid == b->sid && ether_addr_equal(a->remote, b->remote);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static inline int cmp_addr(struct pppoe_addr *a, __be16 sid, char *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return a->sid == sid && ether_addr_equal(a->remote, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #if 8 % PPPOE_HASH_BITS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #error 8 must be a multiple of PPPOE_HASH_BITS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static int hash_item(__be16 sid, unsigned char *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) unsigned char hash = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) for (i = 0; i < ETH_ALEN; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) hash ^= addr[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) for (i = 0; i < sizeof(sid_t) * 8; i += 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) hash ^= (__force __u32)sid >> i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) for (i = 8; (i >>= 1) >= PPPOE_HASH_BITS;)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) hash ^= hash >> i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return hash & PPPOE_HASH_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^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) * Set/get/delete/rehash items (internal versions)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) **********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static struct pppox_sock *__get_item(struct pppoe_net *pn, __be16 sid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) unsigned char *addr, int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) int hash = hash_item(sid, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct pppox_sock *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) ret = pn->hash_table[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) while (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (cmp_addr(&ret->pppoe_pa, sid, addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) ret->pppoe_ifindex == ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) ret = ret->next;
^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) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static int __set_item(struct pppoe_net *pn, struct pppox_sock *po)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct pppox_sock *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) ret = pn->hash_table[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) while (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (cmp_2_addr(&ret->pppoe_pa, &po->pppoe_pa) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) ret->pppoe_ifindex == po->pppoe_ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) ret = ret->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) po->next = pn->hash_table[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) pn->hash_table[hash] = po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static void __delete_item(struct pppoe_net *pn, __be16 sid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) char *addr, int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) int hash = hash_item(sid, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct pppox_sock *ret, **src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) ret = pn->hash_table[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) src = &pn->hash_table[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) while (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (cmp_addr(&ret->pppoe_pa, sid, addr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) ret->pppoe_ifindex == ifindex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) *src = ret->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) break;
^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) src = &ret->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) ret = ret->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /**********************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * Set/get/delete/rehash items
^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 inline struct pppox_sock *get_item(struct pppoe_net *pn, __be16 sid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) unsigned char *addr, int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct pppox_sock *po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) read_lock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) po = __get_item(pn, sid, addr, ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (po)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) sock_hold(sk_pppox(po));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) read_unlock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return po;
^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 inline struct pppox_sock *get_item_by_addr(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct sockaddr_pppox *sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct pppoe_net *pn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct pppox_sock *pppox_sock = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) int ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) dev = dev_get_by_name_rcu(net, sp->sa_addr.pppoe.dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) ifindex = dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) pn = pppoe_pernet(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) pppox_sock = get_item(pn, sp->sa_addr.pppoe.sid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) sp->sa_addr.pppoe.remote, ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return pppox_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static inline void delete_item(struct pppoe_net *pn, __be16 sid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) char *addr, int ifindex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) write_lock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) __delete_item(pn, sid, addr, ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) write_unlock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^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) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * Handler for device events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * Certain device events require that sockets be unconnected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) **************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static void pppoe_flush_dev(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct pppoe_net *pn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) pn = pppoe_pernet(dev_net(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) write_lock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) for (i = 0; i < PPPOE_HASH_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) struct pppox_sock *po = pn->hash_table[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) while (po) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) while (po && po->pppoe_dev != dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) po = po->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (!po)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) sk = sk_pppox(po);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) /* We always grab the socket lock, followed by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) * hash_lock, in that order. Since we should hold the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * sock lock while doing any unbinding, we need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * release the lock we're holding. Hold a reference to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * the sock so it doesn't disappear as we're jumping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * between locks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) sock_hold(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) write_unlock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (po->pppoe_dev == dev &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) pppox_unbind_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) po->pppoe_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) dev_put(dev);
^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) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) sock_put(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /* Restart the process from the start of the current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * hash chain. We dropped locks so the world may have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * change from underneath us.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) BUG_ON(pppoe_pernet(dev_net(dev)) == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) write_lock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) po = pn->hash_table[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) write_unlock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) static int pppoe_device_event(struct notifier_block *this,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) unsigned long event, void *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) struct net_device *dev = netdev_notifier_info_to_dev(ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /* Only look at sockets that are using this specific device. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) case NETDEV_CHANGEADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) case NETDEV_CHANGEMTU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /* A change in mtu or address is a bad thing, requiring
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * LCP re-negotiation.
^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) case NETDEV_GOING_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) case NETDEV_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) /* Find every socket on this device and kill it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) pppoe_flush_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) static struct notifier_block pppoe_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) .notifier_call = pppoe_device_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * Do the real work of receiving a PPPoE Session frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) ***********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct pppox_sock *po = pppox_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) struct pppox_sock *relay_po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) /* Backlog receive. Semantics of backlog rcv preclude any code from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * executing in lock_sock()/release_sock() bounds; meaning sk->sk_state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * can't change.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (skb->pkt_type == PACKET_OTHERHOST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) goto abort_kfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (sk->sk_state & PPPOX_BOUND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) ppp_input(&po->chan, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) } else if (sk->sk_state & PPPOX_RELAY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) relay_po = get_item_by_addr(sock_net(sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) &po->pppoe_relay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (relay_po == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) goto abort_kfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) if ((sk_pppox(relay_po)->sk_state & PPPOX_CONNECTED) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) goto abort_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (!__pppoe_xmit(sk_pppox(relay_po), skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) goto abort_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) sock_put(sk_pppox(relay_po));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) if (sock_queue_rcv_skb(sk, skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) goto abort_kfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return NET_RX_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) abort_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) sock_put(sk_pppox(relay_po));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) abort_kfree:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return NET_RX_DROP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) /************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * Receive wrapper called in BH context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ***********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) static int pppoe_rcv(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) struct packet_type *pt, struct net_device *orig_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct pppoe_hdr *ph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct pppox_sock *po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) struct pppoe_net *pn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) skb = skb_share_check(skb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (skb_mac_header_len(skb) < ETH_HLEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) ph = pppoe_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) len = ntohs(ph->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) skb_pull_rcsum(skb, sizeof(*ph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (skb->len < len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (pskb_trim_rcsum(skb, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) ph = pppoe_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) pn = pppoe_pernet(dev_net(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /* Note that get_item does a sock_hold(), so sk_pppox(po)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * is known to be safe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) po = get_item(pn, ph->sid, eth_hdr(skb)->h_source, dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (!po)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) goto drop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return sk_receive_skb(sk_pppox(po), skb, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) drop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return NET_RX_DROP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) static void pppoe_unbind_sock_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) struct pppox_sock *po = container_of(work, struct pppox_sock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) proto.pppoe.padt_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct sock *sk = sk_pppox(po);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) if (po->pppoe_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) dev_put(po->pppoe_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) po->pppoe_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) pppox_unbind_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) sock_put(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) /************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) * Receive a PPPoE Discovery frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) * This is solely for detection of PADT frames
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ***********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static int pppoe_disc_rcv(struct sk_buff *skb, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) struct packet_type *pt, struct net_device *orig_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) struct pppoe_hdr *ph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) struct pppox_sock *po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) struct pppoe_net *pn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) skb = skb_share_check(skb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (skb->pkt_type != PACKET_HOST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ph = pppoe_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (ph->code != PADT_CODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) pn = pppoe_pernet(dev_net(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) po = get_item(pn, ph->sid, eth_hdr(skb)->h_source, dev->ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (po)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) if (!schedule_work(&po->proto.pppoe.padt_work))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) sock_put(sk_pppox(po));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) abort:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) return NET_RX_SUCCESS; /* Lies... :-) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) static struct packet_type pppoes_ptype __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) .type = cpu_to_be16(ETH_P_PPP_SES),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) .func = pppoe_rcv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) static struct packet_type pppoed_ptype __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) .type = cpu_to_be16(ETH_P_PPP_DISC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) .func = pppoe_disc_rcv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) static struct proto pppoe_sk_proto __read_mostly = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) .name = "PPPOE",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) .obj_size = sizeof(struct pppox_sock),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) /***********************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * Initialize a new struct sock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) **********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) static int pppoe_create(struct net *net, struct socket *sock, int kern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) sk = sk_alloc(net, PF_PPPOX, GFP_KERNEL, &pppoe_sk_proto, kern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) if (!sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) sock_init_data(sock, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) sock->state = SS_UNCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) sock->ops = &pppoe_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) sk->sk_backlog_rcv = pppoe_rcv_core;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) sk->sk_state = PPPOX_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) sk->sk_type = SOCK_STREAM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) sk->sk_family = PF_PPPOX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) sk->sk_protocol = PX_PROTO_OE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) INIT_WORK(&pppox_sk(sk)->proto.pppoe.padt_work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) pppoe_unbind_sock_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) static int pppoe_release(struct socket *sock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) struct pppox_sock *po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) struct pppoe_net *pn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) struct net *net = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) if (!sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (sock_flag(sk, SOCK_DEAD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) return -EBADF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) po = pppox_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (po->pppoe_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) dev_put(po->pppoe_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) po->pppoe_dev = NULL;
^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) pppox_unbind_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) /* Signal the death of the socket. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) sk->sk_state = PPPOX_DEAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) pn = pppoe_pernet(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * protect "po" from concurrent updates
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * on pppoe_flush_dev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) delete_item(pn, po->pppoe_pa.sid, po->pppoe_pa.remote,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) po->pppoe_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) sock_orphan(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) sock->sk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) skb_queue_purge(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) sock_put(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) int sockaddr_len, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) struct sockaddr_pppox *sp = (struct sockaddr_pppox *)uservaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) struct pppox_sock *po = pppox_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) struct net_device *dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) struct pppoe_net *pn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) struct net *net = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) error = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) if (sockaddr_len != sizeof(struct sockaddr_pppox))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (sp->sa_protocol != PX_PROTO_OE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) /* Check for already bound sockets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) error = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if ((sk->sk_state & PPPOX_CONNECTED) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) stage_session(sp->sa_addr.pppoe.sid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) /* Check for already disconnected sockets, on attempts to disconnect */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) error = -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if ((sk->sk_state & PPPOX_DEAD) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) !stage_session(sp->sa_addr.pppoe.sid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) /* Delete the old binding */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if (stage_session(po->pppoe_pa.sid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) pppox_unbind_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) pn = pppoe_pernet(sock_net(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) delete_item(pn, po->pppoe_pa.sid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) po->pppoe_pa.remote, po->pppoe_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (po->pppoe_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) dev_put(po->pppoe_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) po->pppoe_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) po->pppoe_ifindex = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) memset(&po->pppoe_pa, 0, sizeof(po->pppoe_pa));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) memset(&po->pppoe_relay, 0, sizeof(po->pppoe_relay));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) memset(&po->chan, 0, sizeof(po->chan));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) po->next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) po->num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) sk->sk_state = PPPOX_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) /* Re-bind in session stage only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) if (stage_session(sp->sa_addr.pppoe.sid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) error = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) dev = dev_get_by_name(net, sp->sa_addr.pppoe.dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) goto err_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) po->pppoe_dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) po->pppoe_ifindex = dev->ifindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) pn = pppoe_pernet(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) if (!(dev->flags & IFF_UP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) goto err_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) memcpy(&po->pppoe_pa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) &sp->sa_addr.pppoe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) sizeof(struct pppoe_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) write_lock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) error = __set_item(pn, po);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) write_unlock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) if (error < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) goto err_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) po->chan.hdrlen = (sizeof(struct pppoe_hdr) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) dev->hard_header_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr) - 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) po->chan.private = sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) po->chan.ops = &pppoe_chan_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) error = ppp_register_net_channel(dev_net(dev), &po->chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) delete_item(pn, po->pppoe_pa.sid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) po->pppoe_pa.remote, po->pppoe_ifindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) goto err_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) sk->sk_state = PPPOX_CONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) po->num = sp->sa_addr.pppoe.sid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) err_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) if (po->pppoe_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) dev_put(po->pppoe_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) po->pppoe_dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) static int pppoe_getname(struct socket *sock, struct sockaddr *uaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) int peer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) int len = sizeof(struct sockaddr_pppox);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) struct sockaddr_pppox sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) sp.sa_family = AF_PPPOX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) sp.sa_protocol = PX_PROTO_OE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) memcpy(&sp.sa_addr.pppoe, &pppox_sk(sock->sk)->pppoe_pa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) sizeof(struct pppoe_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) memcpy(uaddr, &sp, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) static int pppoe_ioctl(struct socket *sock, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) struct pppox_sock *po = pppox_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) case PPPIOCGMRU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) err = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (!(sk->sk_state & PPPOX_CONNECTED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) if (put_user(po->pppoe_dev->mtu -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) sizeof(struct pppoe_hdr) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) PPP_HDRLEN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) (int __user *)arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) case PPPIOCSMRU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) err = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) if (!(sk->sk_state & PPPOX_CONNECTED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) if (get_user(val, (int __user *)arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) if (val < (po->pppoe_dev->mtu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) - sizeof(struct pppoe_hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) - PPP_HDRLEN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) case PPPIOCSFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (get_user(val, (int __user *)arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) case PPPOEIOCSFWD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) struct pppox_sock *relay_po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) err = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if (sk->sk_state & (PPPOX_BOUND | PPPOX_DEAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) err = -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) if (!(sk->sk_state & PPPOX_CONNECTED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) /* PPPoE address from the user specifies an outbound
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) PPPoE address which frames are forwarded to */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) if (copy_from_user(&po->pppoe_relay,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) (void __user *)arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) sizeof(struct sockaddr_pppox)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) if (po->pppoe_relay.sa_family != AF_PPPOX ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) po->pppoe_relay.sa_protocol != PX_PROTO_OE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) /* Check that the socket referenced by the address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) actually exists. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) relay_po = get_item_by_addr(sock_net(sk), &po->pppoe_relay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) if (!relay_po)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) sock_put(sk_pppox(relay_po));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) sk->sk_state |= PPPOX_RELAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) case PPPOEIOCDFWD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) err = -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) if (!(sk->sk_state & PPPOX_RELAY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) sk->sk_state &= ~PPPOX_RELAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) err = -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) static int pppoe_sendmsg(struct socket *sock, struct msghdr *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) size_t total_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) struct pppox_sock *po = pppox_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) struct pppoe_hdr hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) struct pppoe_hdr *ph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) struct net_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) char *start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) int hlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) error = -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) hdr.ver = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) hdr.type = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) hdr.code = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) hdr.sid = po->num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) dev = po->pppoe_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) error = -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (total_len > (dev->mtu + dev->hard_header_len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) hlen = LL_RESERVED_SPACE(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) skb = sock_wmalloc(sk, hlen + sizeof(*ph) + total_len +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) dev->needed_tailroom, 0, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) /* Reserve space for headers. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) skb_reserve(skb, hlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) skb->priority = sk->sk_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) skb->protocol = cpu_to_be16(ETH_P_PPP_SES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) ph = skb_put(skb, total_len + sizeof(struct pppoe_hdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) start = (char *)&ph->tag[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) error = memcpy_from_msg(start, m, total_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) error = total_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) dev_hard_header(skb, dev, ETH_P_PPP_SES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) po->pppoe_pa.remote, NULL, total_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) memcpy(ph, &hdr, sizeof(struct pppoe_hdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) ph->length = htons(total_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) dev_queue_xmit(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) /************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) * xmit function for internal use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) ***********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) struct pppox_sock *po = pppox_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) struct net_device *dev = po->pppoe_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) struct pppoe_hdr *ph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) int data_len = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) /* The higher-level PPP code (ppp_unregister_channel()) ensures the PPP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) * xmit operations conclude prior to an unregistration call. Thus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) * sk->sk_state cannot change, so we don't need to do lock_sock().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) * But, we also can't do a lock_sock since that introduces a potential
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) * deadlock as we'd reverse the lock ordering used when calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) * ppp_unregister_channel().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) /* Copy the data if there is no space for the header or if it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) * read-only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) if (skb_cow_head(skb, LL_RESERVED_SPACE(dev) + sizeof(*ph)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) goto abort;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) __skb_push(skb, sizeof(*ph));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) ph = pppoe_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) ph->ver = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) ph->type = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) ph->code = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) ph->sid = po->num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) ph->length = htons(data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) skb->protocol = cpu_to_be16(ETH_P_PPP_SES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) dev_hard_header(skb, dev, ETH_P_PPP_SES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) po->pppoe_pa.remote, NULL, data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) dev_queue_xmit(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) abort:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) /************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) * xmit function called by generic PPP driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) * sends PPP frame over PPPoE socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) ***********************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) struct sock *sk = (struct sock *)chan->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) return __pppoe_xmit(sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) static const struct ppp_channel_ops pppoe_chan_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) .start_xmit = pppoe_xmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) static int pppoe_recvmsg(struct socket *sock, struct msghdr *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) size_t total_len, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) if (sk->sk_state & PPPOX_BOUND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) error = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) flags & MSG_DONTWAIT, &error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) if (error < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) goto end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) if (skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) total_len = min_t(size_t, total_len, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) error = skb_copy_datagram_msg(skb, 0, m, total_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) if (error == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) consume_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) return total_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) end:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) static int pppoe_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) struct pppox_sock *po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) char *dev_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) if (v == SEQ_START_TOKEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) seq_puts(seq, "Id Address Device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) po = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) dev_name = po->pppoe_pa.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) seq_printf(seq, "%08X %pM %8s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) po->pppoe_pa.sid, po->pppoe_pa.remote, dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) static inline struct pppox_sock *pppoe_get_idx(struct pppoe_net *pn, loff_t pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) struct pppox_sock *po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) for (i = 0; i < PPPOE_HASH_SIZE; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) po = pn->hash_table[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) while (po) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) if (!pos--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) po = po->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) return po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) static void *pppoe_seq_start(struct seq_file *seq, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) __acquires(pn->hash_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) struct pppoe_net *pn = pppoe_pernet(seq_file_net(seq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) loff_t l = *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) read_lock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) return l ? pppoe_get_idx(pn, --l) : SEQ_START_TOKEN;
^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) static void *pppoe_seq_next(struct seq_file *seq, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) struct pppoe_net *pn = pppoe_pernet(seq_file_net(seq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) struct pppox_sock *po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) ++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) if (v == SEQ_START_TOKEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) po = pppoe_get_idx(pn, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) po = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) if (po->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) po = po->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) po = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) while (++hash < PPPOE_HASH_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) po = pn->hash_table[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) if (po)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) return po;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) static void pppoe_seq_stop(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) __releases(pn->hash_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) struct pppoe_net *pn = pppoe_pernet(seq_file_net(seq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) read_unlock_bh(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) static const struct seq_operations pppoe_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) .start = pppoe_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) .next = pppoe_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) .stop = pppoe_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) .show = pppoe_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) #endif /* CONFIG_PROC_FS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) static const struct proto_ops pppoe_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) .family = AF_PPPOX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) .release = pppoe_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) .bind = sock_no_bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) .connect = pppoe_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) .socketpair = sock_no_socketpair,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) .accept = sock_no_accept,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) .getname = pppoe_getname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) .poll = datagram_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) .listen = sock_no_listen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) .shutdown = sock_no_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) .sendmsg = pppoe_sendmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) .recvmsg = pppoe_recvmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) .mmap = sock_no_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) .ioctl = pppox_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) .compat_ioctl = pppox_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) #endif
^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) static const struct pppox_proto pppoe_proto = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) .create = pppoe_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) .ioctl = pppoe_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) static __net_init int pppoe_init_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) struct pppoe_net *pn = pppoe_pernet(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) struct proc_dir_entry *pde;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) rwlock_init(&pn->hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) pde = proc_create_net("pppoe", 0444, net->proc_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) &pppoe_seq_ops, sizeof(struct seq_net_private));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) if (!pde)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) return 0;
^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) static __net_exit void pppoe_exit_net(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) remove_proc_entry("pppoe", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) static struct pernet_operations pppoe_net_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) .init = pppoe_init_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) .exit = pppoe_exit_net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) .id = &pppoe_net_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) .size = sizeof(struct pppoe_net),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) static int __init pppoe_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) err = register_pernet_device(&pppoe_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) err = proto_register(&pppoe_sk_proto, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) goto out_unregister_net_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) err = register_pppox_proto(PX_PROTO_OE, &pppoe_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) goto out_unregister_pppoe_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) dev_add_pack(&pppoes_ptype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) dev_add_pack(&pppoed_ptype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) register_netdevice_notifier(&pppoe_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) out_unregister_pppoe_proto:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) proto_unregister(&pppoe_sk_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) out_unregister_net_ops:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) unregister_pernet_device(&pppoe_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) static void __exit pppoe_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) unregister_netdevice_notifier(&pppoe_notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) dev_remove_pack(&pppoed_ptype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) dev_remove_pack(&pppoes_ptype);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) unregister_pppox_proto(PX_PROTO_OE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) proto_unregister(&pppoe_sk_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) unregister_pernet_device(&pppoe_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) module_init(pppoe_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) module_exit(pppoe_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) MODULE_AUTHOR("Michal Ostrowski <mostrows@speakeasy.net>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) MODULE_DESCRIPTION("PPP over Ethernet driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) MODULE_ALIAS_NET_PF_PROTO(PF_PPPOX, PX_PROTO_OE);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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