^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _NDISC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _NDISC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <net/ipv6_stubs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * ICMP codes for neighbour discovery messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define NDISC_ROUTER_SOLICITATION 133
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define NDISC_ROUTER_ADVERTISEMENT 134
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define NDISC_NEIGHBOUR_SOLICITATION 135
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define NDISC_NEIGHBOUR_ADVERTISEMENT 136
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define NDISC_REDIRECT 137
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Router type: cross-layer information from link-layer to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * IPv6 layer reported by certain link types (e.g., RFC4214).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define NDISC_NODETYPE_UNSPEC 0 /* unspecified (default) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define NDISC_NODETYPE_HOST 1 /* host or unauthorized router */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define NDISC_NODETYPE_NODEFAULT 2 /* non-default router */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define NDISC_NODETYPE_DEFAULT 3 /* default router */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * ndisc options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) __ND_OPT_PREFIX_INFO_END = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) ND_OPT_SOURCE_LL_ADDR = 1, /* RFC2461 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) ND_OPT_TARGET_LL_ADDR = 2, /* RFC2461 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) ND_OPT_PREFIX_INFO = 3, /* RFC2461 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) ND_OPT_REDIRECT_HDR = 4, /* RFC2461 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) ND_OPT_MTU = 5, /* RFC2461 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ND_OPT_NONCE = 14, /* RFC7527 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) __ND_OPT_ARRAY_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) ND_OPT_ROUTE_INFO = 24, /* RFC4191 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) ND_OPT_RDNSS = 25, /* RFC5006 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) ND_OPT_DNSSL = 31, /* RFC6106 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) ND_OPT_6CO = 34, /* RFC6775 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ND_OPT_CAPTIVE_PORTAL = 37, /* RFC7710 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) ND_OPT_PREF64 = 38, /* RFC8781 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) __ND_OPT_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define MAX_RTR_SOLICITATION_DELAY HZ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define ND_REACHABLE_TIME (30*HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define ND_RETRANS_TIMER HZ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <linux/icmpv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <linux/in6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <linux/if_arp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #include <linux/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #include <net/neighbour.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* Set to 3 to get tracing... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define ND_DEBUG 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define ND_PRINTK(val, level, fmt, ...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (val <= ND_DEBUG) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) net_##level##_ratelimited(fmt, ##__VA_ARGS__); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct ctl_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct inet6_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct net_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct net_proto_family;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct sk_buff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct prefix_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) extern struct neigh_table nd_tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct nd_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct icmp6hdr icmph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct in6_addr target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) __u8 opt[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct rs_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct icmp6hdr icmph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) __u8 opt[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct ra_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct icmp6hdr icmph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) __be32 reachable_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) __be32 retrans_timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct rd_msg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct icmp6hdr icmph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct in6_addr target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct in6_addr dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) __u8 opt[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct nd_opt_hdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) __u8 nd_opt_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) __u8 nd_opt_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* ND options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct ndisc_options {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct nd_opt_hdr *nd_opt_array[__ND_OPT_ARRAY_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #ifdef CONFIG_IPV6_ROUTE_INFO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct nd_opt_hdr *nd_opts_ri;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct nd_opt_hdr *nd_opts_ri_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct nd_opt_hdr *nd_useropts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct nd_opt_hdr *nd_useropts_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct nd_opt_hdr *nd_802154_opt_array[ND_OPT_TARGET_LL_ADDR + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define nd_opts_src_lladdr nd_opt_array[ND_OPT_SOURCE_LL_ADDR]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #define nd_opts_tgt_lladdr nd_opt_array[ND_OPT_TARGET_LL_ADDR]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define nd_opts_pi nd_opt_array[ND_OPT_PREFIX_INFO]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #define nd_opts_pi_end nd_opt_array[__ND_OPT_PREFIX_INFO_END]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #define nd_opts_rh nd_opt_array[ND_OPT_REDIRECT_HDR]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #define nd_opts_mtu nd_opt_array[ND_OPT_MTU]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #define nd_opts_nonce nd_opt_array[ND_OPT_NONCE]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #define nd_802154_opts_src_lladdr nd_802154_opt_array[ND_OPT_SOURCE_LL_ADDR]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #define nd_802154_opts_tgt_lladdr nd_802154_opt_array[ND_OPT_TARGET_LL_ADDR]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define NDISC_OPT_SPACE(len) (((len)+2+7)&~7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct ndisc_options *ndisc_parse_options(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) u8 *opt, int opt_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct ndisc_options *ndopts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) void __ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) int data_len, int pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #define NDISC_OPS_REDIRECT_DATA_SPACE 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * This structure defines the hooks for IPv6 neighbour discovery.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * The following hooks can be defined; unless noted otherwise, they are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * optional and can be filled with a null pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * int (*is_useropt)(u8 nd_opt_type):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * This function is called when IPv6 decide RA userspace options. if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * this function returns 1 then the option given by nd_opt_type will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * be handled as userspace option additional to the IPv6 options.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * int (*parse_options)(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * struct nd_opt_hdr *nd_opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * struct ndisc_options *ndopts):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * This function is called while parsing ndisc ops and put each position
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * as pointer into ndopts. If this function return unequal 0, then this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * function took care about the ndisc option, if 0 then the IPv6 ndisc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * option parser will take care about that option.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * void (*update)(const struct net_device *dev, struct neighbour *n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * u32 flags, u8 icmp6_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * const struct ndisc_options *ndopts):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * This function is called when IPv6 ndisc updates the neighbour cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * entry. Additional options which can be updated may be previously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * parsed by parse_opts callback and accessible over ndopts parameter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * int (*opt_addr_space)(const struct net_device *dev, u8 icmp6_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * struct neighbour *neigh, u8 *ha_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * u8 **ha):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * This function is called when the necessary option space will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * calculated before allocating a skb. The parameters neigh, ha_buf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * abd ha are available on NDISC_REDIRECT messages only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * void (*fill_addr_option)(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * struct sk_buff *skb, u8 icmp6_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * const u8 *ha):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * This function is called when the skb will finally fill the option
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * fields inside skb. NOTE: this callback should fill the option
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) * fields to the skb which are previously indicated by opt_space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * parameter. That means the decision to add such option should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * not lost between these two callbacks, e.g. protected by interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * up state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * void (*prefix_rcv_add_addr)(struct net *net, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * const struct prefix_info *pinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) * struct inet6_dev *in6_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * struct in6_addr *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * int addr_type, u32 addr_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * bool sllao, bool tokenized,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * __u32 valid_lft, u32 prefered_lft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * bool dev_addr_generated):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * This function is called when a RA messages is received with valid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * PIO option fields and an IPv6 address will be added to the interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * for autoconfiguration. The parameter dev_addr_generated reports about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * if the address was based on dev->dev_addr or not. This can be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * to add a second address if link-layer operates with two link layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * addresses. E.g. 802.15.4 6LoWPAN.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct ndisc_ops {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) int (*is_useropt)(u8 nd_opt_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int (*parse_options)(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) struct nd_opt_hdr *nd_opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct ndisc_options *ndopts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) void (*update)(const struct net_device *dev, struct neighbour *n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) u32 flags, u8 icmp6_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) const struct ndisc_options *ndopts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) int (*opt_addr_space)(const struct net_device *dev, u8 icmp6_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct neighbour *neigh, u8 *ha_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) u8 **ha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) void (*fill_addr_option)(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct sk_buff *skb, u8 icmp6_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) const u8 *ha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) void (*prefix_rcv_add_addr)(struct net *net, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) const struct prefix_info *pinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct inet6_dev *in6_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct in6_addr *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) int addr_type, u32 addr_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) bool sllao, bool tokenized,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) __u32 valid_lft, u32 prefered_lft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) bool dev_addr_generated);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static inline int ndisc_ops_is_useropt(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) u8 nd_opt_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (dev->ndisc_ops && dev->ndisc_ops->is_useropt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return dev->ndisc_ops->is_useropt(nd_opt_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static inline int ndisc_ops_parse_options(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) struct nd_opt_hdr *nd_opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct ndisc_options *ndopts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (dev->ndisc_ops && dev->ndisc_ops->parse_options)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return dev->ndisc_ops->parse_options(dev, nd_opt, ndopts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static inline void ndisc_ops_update(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct neighbour *n, u32 flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) u8 icmp6_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) const struct ndisc_options *ndopts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (dev->ndisc_ops && dev->ndisc_ops->update)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) dev->ndisc_ops->update(dev, n, flags, icmp6_type, ndopts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static inline int ndisc_ops_opt_addr_space(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) u8 icmp6_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (dev->ndisc_ops && dev->ndisc_ops->opt_addr_space &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) icmp6_type != NDISC_REDIRECT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) return dev->ndisc_ops->opt_addr_space(dev, icmp6_type, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) return 0;
^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) static inline int ndisc_ops_redirect_opt_addr_space(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct neighbour *neigh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) u8 *ha_buf, u8 **ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (dev->ndisc_ops && dev->ndisc_ops->opt_addr_space)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return dev->ndisc_ops->opt_addr_space(dev, NDISC_REDIRECT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) neigh, ha_buf, ha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static inline void ndisc_ops_fill_addr_option(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) u8 icmp6_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (dev->ndisc_ops && dev->ndisc_ops->fill_addr_option &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) icmp6_type != NDISC_REDIRECT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) dev->ndisc_ops->fill_addr_option(dev, skb, icmp6_type, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static inline void ndisc_ops_fill_redirect_addr_option(const struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) const u8 *ha)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (dev->ndisc_ops && dev->ndisc_ops->fill_addr_option)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) dev->ndisc_ops->fill_addr_option(dev, skb, NDISC_REDIRECT, ha);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static inline void ndisc_ops_prefix_rcv_add_addr(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) const struct prefix_info *pinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct inet6_dev *in6_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct in6_addr *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) int addr_type, u32 addr_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) bool sllao, bool tokenized,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) __u32 valid_lft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) u32 prefered_lft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) bool dev_addr_generated)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (dev->ndisc_ops && dev->ndisc_ops->prefix_rcv_add_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) dev->ndisc_ops->prefix_rcv_add_addr(net, dev, pinfo, in6_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) addr, addr_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) addr_flags, sllao,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) tokenized, valid_lft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) prefered_lft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) dev_addr_generated);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * Return the padding between the option length and the start of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) * link addr. Currently only IP-over-InfiniBand needs this, although
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * if RFC 3831 IPv6-over-Fibre Channel is ever implemented it may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * also need a pad of 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) static inline int ndisc_addr_option_pad(unsigned short type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) case ARPHRD_INFINIBAND: return 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) default: return 0;
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) static inline int __ndisc_opt_addr_space(unsigned char addr_len, int pad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return NDISC_OPT_SPACE(addr_len + pad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) static inline int ndisc_opt_addr_space(struct net_device *dev, u8 icmp6_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) return __ndisc_opt_addr_space(dev->addr_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) ndisc_addr_option_pad(dev->type)) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) ndisc_ops_opt_addr_space(dev, icmp6_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static inline int ndisc_redirect_opt_addr_space(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct neighbour *neigh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) u8 *ops_data_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) u8 **ops_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return __ndisc_opt_addr_space(dev->addr_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) ndisc_addr_option_pad(dev->type)) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) ndisc_ops_redirect_opt_addr_space(dev, neigh, ops_data_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) ops_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static inline u8 *__ndisc_opt_addr_data(struct nd_opt_hdr *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) unsigned char addr_len, int prepad)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) u8 *lladdr = (u8 *)(p + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) int lladdrlen = p->nd_opt_len << 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (lladdrlen != __ndisc_opt_addr_space(addr_len, prepad))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return lladdr + prepad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) return __ndisc_opt_addr_data(p, dev->addr_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) ndisc_addr_option_pad(dev->type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) static inline u32 ndisc_hashfn(const void *pkey, const struct net_device *dev, __u32 *hash_rnd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) const u32 *p32 = pkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return (((p32[0] ^ hash32_ptr(dev)) * hash_rnd[0]) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) (p32[1] * hash_rnd[1]) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) (p32[2] * hash_rnd[2]) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) (p32[3] * hash_rnd[3]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) static inline struct neighbour *__ipv6_neigh_lookup_noref(struct net_device *dev, const void *pkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) return ___neigh_lookup_noref(&nd_tbl, neigh_key_eq128, ndisc_hashfn, pkey, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct neighbour *__ipv6_neigh_lookup_noref_stub(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) const void *pkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return ___neigh_lookup_noref(ipv6_stub->nd_tbl, neigh_key_eq128,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) ndisc_hashfn, pkey, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) static inline struct neighbour *__ipv6_neigh_lookup(struct net_device *dev, const void *pkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) struct neighbour *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) rcu_read_lock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) n = __ipv6_neigh_lookup_noref(dev, pkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) if (n && !refcount_inc_not_zero(&n->refcnt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) n = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) rcu_read_unlock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) return n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static inline void __ipv6_confirm_neigh(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) const void *pkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) struct neighbour *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) rcu_read_lock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) n = __ipv6_neigh_lookup_noref(dev, pkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) if (n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) unsigned long now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) /* avoid dirtying neighbour */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (READ_ONCE(n->confirmed) != now)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) WRITE_ONCE(n->confirmed, now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) rcu_read_unlock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) static inline void __ipv6_confirm_neigh_stub(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) const void *pkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct neighbour *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) rcu_read_lock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) n = __ipv6_neigh_lookup_noref_stub(dev, pkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) unsigned long now = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) /* avoid dirtying neighbour */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (READ_ONCE(n->confirmed) != now)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) WRITE_ONCE(n->confirmed, now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) rcu_read_unlock_bh();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) /* uses ipv6_stub and is meant for use outside of IPv6 core */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) static inline struct neighbour *ip_neigh_gw6(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) const void *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) struct neighbour *neigh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) neigh = __ipv6_neigh_lookup_noref_stub(dev, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (unlikely(!neigh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) neigh = __neigh_create(ipv6_stub->nd_tbl, addr, dev, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return neigh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) int ndisc_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) int ndisc_late_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) void ndisc_late_cleanup(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) void ndisc_cleanup(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) int ndisc_rcv(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) const struct in6_addr *daddr, const struct in6_addr *saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) u64 nonce);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) void ndisc_send_rs(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) const struct in6_addr *saddr, const struct in6_addr *daddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) void ndisc_send_na(struct net_device *dev, const struct in6_addr *daddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) const struct in6_addr *solicited_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) bool router, bool solicited, bool override, bool inc_opt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) int dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) void ndisc_update(const struct net_device *dev, struct neighbour *neigh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) const u8 *lladdr, u8 new, u32 flags, u8 icmp6_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) struct ndisc_options *ndopts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) * IGMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) int igmp6_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) int igmp6_late_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) void igmp6_cleanup(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) void igmp6_late_cleanup(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) int igmp6_event_query(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) int igmp6_event_report(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) #ifdef CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) void *buffer, size_t *lenp, loff_t *ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) int ndisc_ifinfo_sysctl_strategy(struct ctl_table *ctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) void __user *oldval, size_t __user *oldlenp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) void __user *newval, size_t newlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) void inet6_ifinfo_notify(int event, struct inet6_dev *idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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