Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * UDP over IPv6 |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3 | * Linux INET6 implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * Based on linux/ipv4/udp.c |
| 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * Fixes: |
| 11 | * Hideaki YOSHIFUJI : sin6_scope_id support |
| 12 | * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which |
| 13 | * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind |
| 14 | * a single port at the same time. |
| 15 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data |
| 16 | * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or |
| 19 | * modify it under the terms of the GNU General Public License |
| 20 | * as published by the Free Software Foundation; either version |
| 21 | * 2 of the License, or (at your option) any later version. |
| 22 | */ |
| 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/errno.h> |
| 25 | #include <linux/types.h> |
| 26 | #include <linux/socket.h> |
| 27 | #include <linux/sockios.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/net.h> |
| 29 | #include <linux/in6.h> |
| 30 | #include <linux/netdevice.h> |
| 31 | #include <linux/if_arp.h> |
| 32 | #include <linux/ipv6.h> |
| 33 | #include <linux/icmpv6.h> |
| 34 | #include <linux/init.h> |
Herbert Xu | 1781f7f | 2007-12-11 11:30:32 -0800 | [diff] [blame] | 35 | #include <linux/module.h> |
Herbert Xu | 3305b80 | 2005-12-13 23:16:37 -0800 | [diff] [blame] | 36 | #include <linux/skbuff.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <asm/uaccess.h> |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <net/ndisc.h> |
| 41 | #include <net/protocol.h> |
| 42 | #include <net/transp_v6.h> |
| 43 | #include <net/ip6_route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <net/raw.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 45 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <net/ip6_checksum.h> |
| 47 | #include <net/xfrm.h> |
Tom Herbert | 72289b9 | 2013-01-22 09:50:44 +0000 | [diff] [blame] | 48 | #include <net/inet6_hashtables.h> |
Eliezer Tamir | 076bb0c | 2013-07-10 17:13:17 +0300 | [diff] [blame] | 49 | #include <net/busy_poll.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | #include <linux/proc_fs.h> |
| 52 | #include <linux/seq_file.h> |
Eric Dumazet | 22911fc | 2012-06-27 00:23:44 +0000 | [diff] [blame] | 53 | #include <trace/events/skb.h> |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 54 | #include "udp_impl.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Hannes Frederic Sowa | b50026b | 2013-10-19 21:48:52 +0200 | [diff] [blame^] | 56 | static unsigned int udp6_ehashfn(struct net *net, |
| 57 | const struct in6_addr *laddr, |
| 58 | const u16 lport, |
| 59 | const struct in6_addr *faddr, |
| 60 | const __be16 fport) |
| 61 | { |
| 62 | const u32 lhash = (__force u32)laddr->s6_addr32[3]; |
| 63 | const u32 fhash = __ipv6_addr_jhash(faddr, ipv6_hash_secret); |
| 64 | return __inet6_ehashfn(lhash, lport, fhash, fport, |
| 65 | inet_ehash_secret + net_hash_mix(net)); |
| 66 | } |
| 67 | |
Vlad Yasevich | b2f5e7c | 2009-03-24 16:24:51 +0000 | [diff] [blame] | 68 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
| 69 | { |
Vlad Yasevich | b2f5e7c | 2009-03-24 16:24:51 +0000 | [diff] [blame] | 70 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
| 71 | int sk_ipv6only = ipv6_only_sock(sk); |
| 72 | int sk2_ipv6only = inet_v6_ipv6only(sk2); |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 73 | int addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr); |
Vlad Yasevich | b2f5e7c | 2009-03-24 16:24:51 +0000 | [diff] [blame] | 74 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; |
| 75 | |
| 76 | /* if both are mapped, treat as IPv4 */ |
| 77 | if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) |
Vlad Yasevich | 499923c | 2009-04-09 17:37:33 +0000 | [diff] [blame] | 78 | return (!sk2_ipv6only && |
Eric Dumazet | 5080546 | 2013-10-02 04:29:50 -0700 | [diff] [blame] | 79 | (!sk->sk_rcv_saddr || !sk2->sk_rcv_saddr || |
| 80 | sk->sk_rcv_saddr == sk2->sk_rcv_saddr)); |
Vlad Yasevich | b2f5e7c | 2009-03-24 16:24:51 +0000 | [diff] [blame] | 81 | |
| 82 | if (addr_type2 == IPV6_ADDR_ANY && |
| 83 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) |
| 84 | return 1; |
| 85 | |
| 86 | if (addr_type == IPV6_ADDR_ANY && |
| 87 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) |
| 88 | return 1; |
| 89 | |
| 90 | if (sk2_rcv_saddr6 && |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 91 | ipv6_addr_equal(&sk->sk_v6_rcv_saddr, sk2_rcv_saddr6)) |
Vlad Yasevich | b2f5e7c | 2009-03-24 16:24:51 +0000 | [diff] [blame] | 92 | return 1; |
| 93 | |
| 94 | return 0; |
| 95 | } |
| 96 | |
Eric Dumazet | d4cada4 | 2009-11-08 10:17:30 +0000 | [diff] [blame] | 97 | static unsigned int udp6_portaddr_hash(struct net *net, |
| 98 | const struct in6_addr *addr6, |
| 99 | unsigned int port) |
| 100 | { |
| 101 | unsigned int hash, mix = net_hash_mix(net); |
| 102 | |
| 103 | if (ipv6_addr_any(addr6)) |
| 104 | hash = jhash_1word(0, mix); |
Brian Haley | 856540e | 2009-11-09 12:05:53 +0000 | [diff] [blame] | 105 | else if (ipv6_addr_v4mapped(addr6)) |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 106 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
Eric Dumazet | d4cada4 | 2009-11-08 10:17:30 +0000 | [diff] [blame] | 107 | else |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 108 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
Eric Dumazet | d4cada4 | 2009-11-08 10:17:30 +0000 | [diff] [blame] | 109 | |
| 110 | return hash ^ port; |
| 111 | } |
| 112 | |
| 113 | |
Pavel Emelyanov | 6ba5a3c | 2008-03-22 16:51:21 -0700 | [diff] [blame] | 114 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
Eric Dumazet | 30fff92 | 2009-11-09 05:26:33 +0000 | [diff] [blame] | 116 | unsigned int hash2_nulladdr = |
| 117 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); |
Jeffrin Jose | 9a52e97 | 2012-05-19 01:45:21 +0000 | [diff] [blame] | 118 | unsigned int hash2_partial = |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 119 | udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0); |
Eric Dumazet | 30fff92 | 2009-11-09 05:26:33 +0000 | [diff] [blame] | 120 | |
Eric Dumazet | d4cada4 | 2009-11-08 10:17:30 +0000 | [diff] [blame] | 121 | /* precompute partial secondary hash */ |
Eric Dumazet | 30fff92 | 2009-11-09 05:26:33 +0000 | [diff] [blame] | 122 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
| 123 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | |
Eric Dumazet | 719f835 | 2010-09-08 05:08:44 +0000 | [diff] [blame] | 126 | static void udp_v6_rehash(struct sock *sk) |
| 127 | { |
| 128 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 129 | &sk->sk_v6_rcv_saddr, |
Eric Dumazet | 719f835 | 2010-09-08 05:08:44 +0000 | [diff] [blame] | 130 | inet_sk(sk)->inet_num); |
| 131 | |
| 132 | udp_lib_rehash(sk, new_hash); |
| 133 | } |
| 134 | |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 135 | static inline int compute_score(struct sock *sk, struct net *net, |
| 136 | unsigned short hnum, |
Balazs Scheidler | 88440ae | 2010-10-21 16:04:33 +0200 | [diff] [blame] | 137 | const struct in6_addr *saddr, __be16 sport, |
| 138 | const struct in6_addr *daddr, __be16 dport, |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 139 | int dif) |
| 140 | { |
| 141 | int score = -1; |
| 142 | |
Eric Dumazet | d4cada4 | 2009-11-08 10:17:30 +0000 | [diff] [blame] | 143 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 144 | sk->sk_family == PF_INET6) { |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 145 | struct inet_sock *inet = inet_sk(sk); |
| 146 | |
| 147 | score = 0; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 148 | if (inet->inet_dport) { |
| 149 | if (inet->inet_dport != sport) |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 150 | return -1; |
| 151 | score++; |
| 152 | } |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 153 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
| 154 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 155 | return -1; |
| 156 | score++; |
| 157 | } |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 158 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
| 159 | if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 160 | return -1; |
| 161 | score++; |
| 162 | } |
| 163 | if (sk->sk_bound_dev_if) { |
| 164 | if (sk->sk_bound_dev_if != dif) |
| 165 | return -1; |
| 166 | score++; |
| 167 | } |
| 168 | } |
| 169 | return score; |
| 170 | } |
| 171 | |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 172 | #define SCORE2_MAX (1 + 1 + 1) |
| 173 | static inline int compute_score2(struct sock *sk, struct net *net, |
| 174 | const struct in6_addr *saddr, __be16 sport, |
| 175 | const struct in6_addr *daddr, unsigned short hnum, |
| 176 | int dif) |
| 177 | { |
| 178 | int score = -1; |
| 179 | |
| 180 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
| 181 | sk->sk_family == PF_INET6) { |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 182 | struct inet_sock *inet = inet_sk(sk); |
| 183 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 184 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 185 | return -1; |
| 186 | score = 0; |
| 187 | if (inet->inet_dport) { |
| 188 | if (inet->inet_dport != sport) |
| 189 | return -1; |
| 190 | score++; |
| 191 | } |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 192 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
| 193 | if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 194 | return -1; |
| 195 | score++; |
| 196 | } |
| 197 | if (sk->sk_bound_dev_if) { |
| 198 | if (sk->sk_bound_dev_if != dif) |
| 199 | return -1; |
| 200 | score++; |
| 201 | } |
| 202 | } |
| 203 | return score; |
| 204 | } |
| 205 | |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 206 | |
| 207 | /* called with read_rcu_lock() */ |
| 208 | static struct sock *udp6_lib_lookup2(struct net *net, |
| 209 | const struct in6_addr *saddr, __be16 sport, |
| 210 | const struct in6_addr *daddr, unsigned int hnum, int dif, |
| 211 | struct udp_hslot *hslot2, unsigned int slot2) |
| 212 | { |
| 213 | struct sock *sk, *result; |
| 214 | struct hlist_nulls_node *node; |
Tom Herbert | 72289b9 | 2013-01-22 09:50:44 +0000 | [diff] [blame] | 215 | int score, badness, matches = 0, reuseport = 0; |
| 216 | u32 hash = 0; |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 217 | |
| 218 | begin: |
| 219 | result = NULL; |
| 220 | badness = -1; |
| 221 | udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { |
| 222 | score = compute_score2(sk, net, saddr, sport, |
| 223 | daddr, hnum, dif); |
| 224 | if (score > badness) { |
| 225 | result = sk; |
| 226 | badness = score; |
Tom Herbert | 72289b9 | 2013-01-22 09:50:44 +0000 | [diff] [blame] | 227 | reuseport = sk->sk_reuseport; |
| 228 | if (reuseport) { |
Hannes Frederic Sowa | b50026b | 2013-10-19 21:48:52 +0200 | [diff] [blame^] | 229 | hash = udp6_ehashfn(net, daddr, hnum, |
| 230 | saddr, sport); |
Tom Herbert | 72289b9 | 2013-01-22 09:50:44 +0000 | [diff] [blame] | 231 | matches = 1; |
| 232 | } else if (score == SCORE2_MAX) |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 233 | goto exact_match; |
Tom Herbert | 72289b9 | 2013-01-22 09:50:44 +0000 | [diff] [blame] | 234 | } else if (score == badness && reuseport) { |
| 235 | matches++; |
| 236 | if (((u64)hash * matches) >> 32 == 0) |
| 237 | result = sk; |
| 238 | hash = next_pseudo_random32(hash); |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 239 | } |
| 240 | } |
| 241 | /* |
| 242 | * if the nulls value we got at the end of this lookup is |
| 243 | * not the expected one, we must restart lookup. |
| 244 | * We probably met an item that was moved to another chain. |
| 245 | */ |
| 246 | if (get_nulls_value(node) != slot2) |
| 247 | goto begin; |
| 248 | |
| 249 | if (result) { |
| 250 | exact_match: |
Eric Dumazet | c31504d | 2010-11-15 19:58:26 +0000 | [diff] [blame] | 251 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 252 | result = NULL; |
| 253 | else if (unlikely(compute_score2(result, net, saddr, sport, |
| 254 | daddr, hnum, dif) < badness)) { |
| 255 | sock_put(result); |
| 256 | goto begin; |
| 257 | } |
| 258 | } |
| 259 | return result; |
| 260 | } |
| 261 | |
Pavel Emelyanov | fce8233 | 2011-12-09 06:23:34 +0000 | [diff] [blame] | 262 | struct sock *__udp6_lib_lookup(struct net *net, |
Balazs Scheidler | 88440ae | 2010-10-21 16:04:33 +0200 | [diff] [blame] | 263 | const struct in6_addr *saddr, __be16 sport, |
| 264 | const struct in6_addr *daddr, __be16 dport, |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 265 | int dif, struct udp_table *udptable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | { |
Eric Dumazet | 271b72c | 2008-10-29 02:11:14 -0700 | [diff] [blame] | 267 | struct sock *sk, *result; |
Eric Dumazet | 88ab193 | 2008-11-16 19:39:21 -0800 | [diff] [blame] | 268 | struct hlist_nulls_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | unsigned short hnum = ntohs(dport); |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 270 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
| 271 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; |
Tom Herbert | 72289b9 | 2013-01-22 09:50:44 +0000 | [diff] [blame] | 272 | int score, badness, matches = 0, reuseport = 0; |
| 273 | u32 hash = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Eric Dumazet | 271b72c | 2008-10-29 02:11:14 -0700 | [diff] [blame] | 275 | rcu_read_lock(); |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 276 | if (hslot->count > 10) { |
| 277 | hash2 = udp6_portaddr_hash(net, daddr, hnum); |
| 278 | slot2 = hash2 & udptable->mask; |
| 279 | hslot2 = &udptable->hash2[slot2]; |
| 280 | if (hslot->count < hslot2->count) |
| 281 | goto begin; |
| 282 | |
| 283 | result = udp6_lib_lookup2(net, saddr, sport, |
| 284 | daddr, hnum, dif, |
| 285 | hslot2, slot2); |
| 286 | if (!result) { |
| 287 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); |
| 288 | slot2 = hash2 & udptable->mask; |
| 289 | hslot2 = &udptable->hash2[slot2]; |
| 290 | if (hslot->count < hslot2->count) |
| 291 | goto begin; |
| 292 | |
Jorge Boncompte [DTI2] | 1223c67 | 2010-04-08 04:56:48 +0000 | [diff] [blame] | 293 | result = udp6_lib_lookup2(net, saddr, sport, |
| 294 | &in6addr_any, hnum, dif, |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 295 | hslot2, slot2); |
| 296 | } |
| 297 | rcu_read_unlock(); |
| 298 | return result; |
| 299 | } |
Eric Dumazet | 271b72c | 2008-10-29 02:11:14 -0700 | [diff] [blame] | 300 | begin: |
| 301 | result = NULL; |
| 302 | badness = -1; |
Eric Dumazet | 88ab193 | 2008-11-16 19:39:21 -0800 | [diff] [blame] | 303 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 304 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
| 305 | if (score > badness) { |
| 306 | result = sk; |
| 307 | badness = score; |
Tom Herbert | 72289b9 | 2013-01-22 09:50:44 +0000 | [diff] [blame] | 308 | reuseport = sk->sk_reuseport; |
| 309 | if (reuseport) { |
Hannes Frederic Sowa | b50026b | 2013-10-19 21:48:52 +0200 | [diff] [blame^] | 310 | hash = udp6_ehashfn(net, daddr, hnum, |
| 311 | saddr, sport); |
Tom Herbert | 72289b9 | 2013-01-22 09:50:44 +0000 | [diff] [blame] | 312 | matches = 1; |
| 313 | } |
| 314 | } else if (score == badness && reuseport) { |
| 315 | matches++; |
| 316 | if (((u64)hash * matches) >> 32 == 0) |
| 317 | result = sk; |
| 318 | hash = next_pseudo_random32(hash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | } |
| 320 | } |
Eric Dumazet | 88ab193 | 2008-11-16 19:39:21 -0800 | [diff] [blame] | 321 | /* |
| 322 | * if the nulls value we got at the end of this lookup is |
| 323 | * not the expected one, we must restart lookup. |
| 324 | * We probably met an item that was moved to another chain. |
| 325 | */ |
Eric Dumazet | fddc17d | 2009-11-08 10:18:30 +0000 | [diff] [blame] | 326 | if (get_nulls_value(node) != slot) |
Eric Dumazet | 88ab193 | 2008-11-16 19:39:21 -0800 | [diff] [blame] | 327 | goto begin; |
| 328 | |
Eric Dumazet | 271b72c | 2008-10-29 02:11:14 -0700 | [diff] [blame] | 329 | if (result) { |
Eric Dumazet | c31504d | 2010-11-15 19:58:26 +0000 | [diff] [blame] | 330 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
Eric Dumazet | 271b72c | 2008-10-29 02:11:14 -0700 | [diff] [blame] | 331 | result = NULL; |
| 332 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, |
| 333 | daddr, dport, dif) < badness)) { |
| 334 | sock_put(result); |
| 335 | goto begin; |
| 336 | } |
| 337 | } |
| 338 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | return result; |
| 340 | } |
Pavel Emelyanov | fce8233 | 2011-12-09 06:23:34 +0000 | [diff] [blame] | 341 | EXPORT_SYMBOL_GPL(__udp6_lib_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
KOVACS Krisztian | 607c4aa | 2008-10-07 12:38:32 -0700 | [diff] [blame] | 343 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
| 344 | __be16 sport, __be16 dport, |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 345 | struct udp_table *udptable) |
KOVACS Krisztian | 607c4aa | 2008-10-07 12:38:32 -0700 | [diff] [blame] | 346 | { |
KOVACS Krisztian | 2354261 | 2008-10-07 12:41:01 -0700 | [diff] [blame] | 347 | struct sock *sk; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 348 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
KOVACS Krisztian | 607c4aa | 2008-10-07 12:38:32 -0700 | [diff] [blame] | 349 | |
KOVACS Krisztian | 2354261 | 2008-10-07 12:41:01 -0700 | [diff] [blame] | 350 | if (unlikely(sk = skb_steal_sock(skb))) |
| 351 | return sk; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 352 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
| 353 | &iph->daddr, dport, inet6_iif(skb), |
| 354 | udptable); |
KOVACS Krisztian | 607c4aa | 2008-10-07 12:38:32 -0700 | [diff] [blame] | 355 | } |
| 356 | |
Balazs Scheidler | aa976fc | 2010-10-21 16:05:41 +0200 | [diff] [blame] | 357 | struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, |
| 358 | const struct in6_addr *daddr, __be16 dport, int dif) |
| 359 | { |
| 360 | return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); |
| 361 | } |
| 362 | EXPORT_SYMBOL_GPL(udp6_lib_lookup); |
| 363 | |
| 364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | * This should be easy, if there is something there we |
| 367 | * return it, otherwise we block. |
| 368 | */ |
| 369 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 370 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | struct msghdr *msg, size_t len, |
| 372 | int noblock, int flags, int *addr_len) |
| 373 | { |
| 374 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 375 | struct inet_sock *inet = inet_sk(sk); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 376 | struct sk_buff *skb; |
David S. Miller | 59c2cda | 2011-12-01 14:12:55 -0500 | [diff] [blame] | 377 | unsigned int ulen, copied; |
Pavel Emelyanov | 3f518bf | 2012-02-21 07:30:58 +0000 | [diff] [blame] | 378 | int peeked, off = 0; |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 379 | int err; |
| 380 | int is_udplite = IS_UDPLITE(sk); |
Wei Yongjun | f26ba17 | 2008-11-02 16:11:01 +0000 | [diff] [blame] | 381 | int is_udp4; |
Eric Dumazet | 8a74ad6 | 2010-05-26 19:20:18 +0000 | [diff] [blame] | 382 | bool slow; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 384 | if (addr_len) |
Jeffrin Jose | 3dde259 | 2012-05-19 01:59:04 +0000 | [diff] [blame] | 385 | *addr_len = sizeof(struct sockaddr_in6); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | if (flags & MSG_ERRQUEUE) |
| 388 | return ipv6_recv_error(sk, msg, len); |
| 389 | |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 390 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
| 391 | return ipv6_recv_rxpmtu(sk, msg, len); |
| 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | try_again: |
Herbert Xu | a59322b | 2007-12-05 01:53:40 -0800 | [diff] [blame] | 394 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
Pavel Emelyanov | 3f518bf | 2012-02-21 07:30:58 +0000 | [diff] [blame] | 395 | &peeked, &off, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | if (!skb) |
| 397 | goto out; |
| 398 | |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 399 | ulen = skb->len - sizeof(struct udphdr); |
David S. Miller | 59c2cda | 2011-12-01 14:12:55 -0500 | [diff] [blame] | 400 | copied = len; |
| 401 | if (copied > ulen) |
| 402 | copied = ulen; |
| 403 | else if (copied < ulen) |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 404 | msg->msg_flags |= MSG_TRUNC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Wei Yongjun | f26ba17 | 2008-11-02 16:11:01 +0000 | [diff] [blame] | 406 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
| 407 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 408 | /* |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 409 | * If checksum is needed at all, try to do it while copying the |
| 410 | * data. If the data is truncated, or if we only want a partial |
| 411 | * coverage checksum (UDP-Lite), do it before the copy. |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 412 | */ |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 413 | |
David S. Miller | 59c2cda | 2011-12-01 14:12:55 -0500 | [diff] [blame] | 414 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 415 | if (udp_lib_checksum_complete(skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | goto csum_copy_err; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 417 | } |
| 418 | |
Herbert Xu | 6047637 | 2007-04-09 11:59:39 -0700 | [diff] [blame] | 419 | if (skb_csum_unnecessary(skb)) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 420 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
Eric Dumazet | 22911fc | 2012-06-27 00:23:44 +0000 | [diff] [blame] | 421 | msg->msg_iov, copied); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 422 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
| 424 | if (err == -EINVAL) |
| 425 | goto csum_copy_err; |
| 426 | } |
Eric Dumazet | 22911fc | 2012-06-27 00:23:44 +0000 | [diff] [blame] | 427 | if (unlikely(err)) { |
| 428 | trace_kfree_skb(skb, udpv6_recvmsg); |
Eric Dumazet | 979402b | 2012-09-05 23:34:44 +0000 | [diff] [blame] | 429 | if (!peeked) { |
| 430 | atomic_inc(&sk->sk_drops); |
| 431 | if (is_udp4) |
| 432 | UDP_INC_STATS_USER(sock_net(sk), |
| 433 | UDP_MIB_INERRORS, |
| 434 | is_udplite); |
| 435 | else |
| 436 | UDP6_INC_STATS_USER(sock_net(sk), |
| 437 | UDP_MIB_INERRORS, |
| 438 | is_udplite); |
| 439 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | goto out_free; |
Eric Dumazet | 22911fc | 2012-06-27 00:23:44 +0000 | [diff] [blame] | 441 | } |
Wei Yongjun | f26ba17 | 2008-11-02 16:11:01 +0000 | [diff] [blame] | 442 | if (!peeked) { |
| 443 | if (is_udp4) |
| 444 | UDP_INC_STATS_USER(sock_net(sk), |
| 445 | UDP_MIB_INDATAGRAMS, is_udplite); |
| 446 | else |
| 447 | UDP6_INC_STATS_USER(sock_net(sk), |
| 448 | UDP_MIB_INDATAGRAMS, is_udplite); |
| 449 | } |
Wang Chen | cb75994 | 2007-12-03 22:33:28 +1100 | [diff] [blame] | 450 | |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 451 | sock_recv_ts_and_drops(msg, sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
| 453 | /* Copy the address. */ |
| 454 | if (msg->msg_name) { |
| 455 | struct sockaddr_in6 *sin6; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
| 458 | sin6->sin6_family = AF_INET6; |
Arnaldo Carvalho de Melo | 4bedb45 | 2007-03-13 14:28:48 -0300 | [diff] [blame] | 459 | sin6->sin6_port = udp_hdr(skb)->source; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | sin6->sin6_flowinfo = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
Hannes Frederic Sowa | 842df07 | 2013-03-08 02:07:19 +0000 | [diff] [blame] | 462 | if (is_udp4) { |
Brian Haley | b301e82 | 2009-10-07 13:58:25 -0700 | [diff] [blame] | 463 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
| 464 | &sin6->sin6_addr); |
Hannes Frederic Sowa | 842df07 | 2013-03-08 02:07:19 +0000 | [diff] [blame] | 465 | sin6->sin6_scope_id = 0; |
| 466 | } else { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 467 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
Hannes Frederic Sowa | 842df07 | 2013-03-08 02:07:19 +0000 | [diff] [blame] | 468 | sin6->sin6_scope_id = |
| 469 | ipv6_iface_scope_id(&sin6->sin6_addr, |
| 470 | IP6CB(skb)->iif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | } |
Wei Yongjun | f26ba17 | 2008-11-02 16:11:01 +0000 | [diff] [blame] | 474 | if (is_udp4) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | if (inet->cmsg_flags) |
| 476 | ip_cmsg_recv(msg, skb); |
| 477 | } else { |
| 478 | if (np->rxopt.all) |
Tom Parkin | 73df66f | 2013-01-31 01:02:24 +0000 | [diff] [blame] | 479 | ip6_datagram_recv_ctl(sk, msg, skb); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 480 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
David S. Miller | 59c2cda | 2011-12-01 14:12:55 -0500 | [diff] [blame] | 482 | err = copied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | if (flags & MSG_TRUNC) |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 484 | err = ulen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
| 486 | out_free: |
Eric Dumazet | 9d410c7 | 2009-10-30 05:03:53 +0000 | [diff] [blame] | 487 | skb_free_datagram_locked(sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | out: |
| 489 | return err; |
| 490 | |
| 491 | csum_copy_err: |
Eric Dumazet | 8a74ad6 | 2010-05-26 19:20:18 +0000 | [diff] [blame] | 492 | slow = lock_sock_fast(sk); |
Wei Yongjun | 0856f93 | 2008-11-02 16:14:27 +0000 | [diff] [blame] | 493 | if (!skb_kill_datagram(sk, skb, flags)) { |
Eric Dumazet | 6a5dc9e | 2013-04-29 08:39:56 +0000 | [diff] [blame] | 494 | if (is_udp4) { |
| 495 | UDP_INC_STATS_USER(sock_net(sk), |
| 496 | UDP_MIB_CSUMERRORS, is_udplite); |
Wei Yongjun | 0856f93 | 2008-11-02 16:14:27 +0000 | [diff] [blame] | 497 | UDP_INC_STATS_USER(sock_net(sk), |
| 498 | UDP_MIB_INERRORS, is_udplite); |
Eric Dumazet | 6a5dc9e | 2013-04-29 08:39:56 +0000 | [diff] [blame] | 499 | } else { |
| 500 | UDP6_INC_STATS_USER(sock_net(sk), |
| 501 | UDP_MIB_CSUMERRORS, is_udplite); |
Wei Yongjun | 0856f93 | 2008-11-02 16:14:27 +0000 | [diff] [blame] | 502 | UDP6_INC_STATS_USER(sock_net(sk), |
| 503 | UDP_MIB_INERRORS, is_udplite); |
Eric Dumazet | 6a5dc9e | 2013-04-29 08:39:56 +0000 | [diff] [blame] | 504 | } |
Wei Yongjun | 0856f93 | 2008-11-02 16:14:27 +0000 | [diff] [blame] | 505 | } |
Eric Dumazet | 8a74ad6 | 2010-05-26 19:20:18 +0000 | [diff] [blame] | 506 | unlock_sock_fast(sk, slow); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
Xufeng Zhang | 32c9025 | 2011-06-21 10:43:39 +0000 | [diff] [blame] | 508 | if (noblock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | return -EAGAIN; |
Xufeng Zhang | 9cfaa8d | 2011-06-21 10:43:40 +0000 | [diff] [blame] | 510 | |
| 511 | /* starting over for a new packet */ |
| 512 | msg->msg_flags &= ~MSG_TRUNC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | goto try_again; |
| 514 | } |
| 515 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 516 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 517 | u8 type, u8 code, int offset, __be32 info, |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 518 | struct udp_table *udptable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | { |
| 520 | struct ipv6_pinfo *np; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 521 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
| 522 | const struct in6_addr *saddr = &hdr->saddr; |
| 523 | const struct in6_addr *daddr = &hdr->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); |
| 525 | struct sock *sk; |
| 526 | int err; |
| 527 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 528 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 529 | saddr, uh->source, inet6_iif(skb), udptable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | if (sk == NULL) |
| 531 | return; |
| 532 | |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 533 | if (type == ICMPV6_PKT_TOOBIG) |
| 534 | ip6_sk_update_pmtu(skb, sk, info); |
Duan Jiong | 1a462d1 | 2013-09-20 18:20:28 +0800 | [diff] [blame] | 535 | if (type == NDISC_REDIRECT) { |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 536 | ip6_sk_redirect(skb, sk); |
Duan Jiong | 1a462d1 | 2013-09-20 18:20:28 +0800 | [diff] [blame] | 537 | goto out; |
| 538 | } |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | np = inet6_sk(sk); |
| 541 | |
| 542 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) |
| 543 | goto out; |
| 544 | |
| 545 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) |
| 546 | goto out; |
| 547 | |
Eric Dumazet | b1faf56 | 2010-05-31 23:44:05 -0700 | [diff] [blame] | 548 | if (np->recverr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
Eric Dumazet | b1faf56 | 2010-05-31 23:44:05 -0700 | [diff] [blame] | 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | sk->sk_err = err; |
| 552 | sk->sk_error_report(sk); |
| 553 | out: |
| 554 | sock_put(sk); |
| 555 | } |
| 556 | |
Benjamin LaHaise | f7ad74f | 2012-04-27 08:23:21 +0000 | [diff] [blame] | 557 | static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
| 558 | { |
| 559 | int rc; |
| 560 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 561 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
Benjamin LaHaise | f7ad74f | 2012-04-27 08:23:21 +0000 | [diff] [blame] | 562 | sock_rps_save_rxhash(sk, skb); |
Shawn Bohrer | 005ec97 | 2013-10-07 11:01:38 -0500 | [diff] [blame] | 563 | sk_mark_napi_id(sk, skb); |
| 564 | } |
Benjamin LaHaise | f7ad74f | 2012-04-27 08:23:21 +0000 | [diff] [blame] | 565 | |
| 566 | rc = sock_queue_rcv_skb(sk, skb); |
| 567 | if (rc < 0) { |
| 568 | int is_udplite = IS_UDPLITE(sk); |
| 569 | |
| 570 | /* Note that an ENOMEM error is charged twice */ |
| 571 | if (rc == -ENOMEM) |
| 572 | UDP6_INC_STATS_BH(sock_net(sk), |
| 573 | UDP_MIB_RCVBUFERRORS, is_udplite); |
| 574 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
| 575 | kfree_skb(skb); |
| 576 | return -1; |
| 577 | } |
| 578 | return 0; |
| 579 | } |
| 580 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 581 | static __inline__ void udpv6_err(struct sk_buff *skb, |
Brian Haley | d5fdd6b | 2009-06-23 04:31:07 -0700 | [diff] [blame] | 582 | struct inet6_skb_parm *opt, u8 type, |
| 583 | u8 code, int offset, __be32 info ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | { |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 585 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 586 | } |
| 587 | |
Benjamin LaHaise | d7f3f62 | 2012-04-27 08:24:08 +0000 | [diff] [blame] | 588 | static struct static_key udpv6_encap_needed __read_mostly; |
| 589 | void udpv6_encap_enable(void) |
| 590 | { |
| 591 | if (!static_key_enabled(&udpv6_encap_needed)) |
| 592 | static_key_slow_inc(&udpv6_encap_needed); |
| 593 | } |
| 594 | EXPORT_SYMBOL(udpv6_encap_enable); |
| 595 | |
Benjamin LaHaise | f7ad74f | 2012-04-27 08:23:21 +0000 | [diff] [blame] | 596 | int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 597 | { |
| 598 | struct udp_sock *up = udp_sk(sk); |
David S. Miller | a18135e | 2006-08-15 00:00:09 -0700 | [diff] [blame] | 599 | int rc; |
Wang Chen | b2bf1e2 | 2007-12-03 22:34:16 +1100 | [diff] [blame] | 600 | int is_udplite = IS_UDPLITE(sk); |
David S. Miller | a18135e | 2006-08-15 00:00:09 -0700 | [diff] [blame] | 601 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 602 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
| 603 | goto drop; |
| 604 | |
Benjamin LaHaise | d7f3f62 | 2012-04-27 08:24:08 +0000 | [diff] [blame] | 605 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
| 606 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); |
| 607 | |
| 608 | /* |
| 609 | * This is an encapsulation socket so pass the skb to |
| 610 | * the socket's udp_encap_rcv() hook. Otherwise, just |
| 611 | * fall through and pass this up the UDP socket. |
| 612 | * up->encap_rcv() returns the following value: |
| 613 | * =0 if skb was successfully passed to the encap |
| 614 | * handler or was discarded by it. |
| 615 | * >0 if skb should be passed on to UDP. |
| 616 | * <0 if skb should be resubmitted as proto -N |
| 617 | */ |
| 618 | |
| 619 | /* if we're overly short, let UDP handle it */ |
| 620 | encap_rcv = ACCESS_ONCE(up->encap_rcv); |
| 621 | if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) { |
| 622 | int ret; |
| 623 | |
| 624 | ret = encap_rcv(sk, skb); |
| 625 | if (ret <= 0) { |
| 626 | UDP_INC_STATS_BH(sock_net(sk), |
| 627 | UDP_MIB_INDATAGRAMS, |
| 628 | is_udplite); |
| 629 | return -ret; |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | /* FALLTHROUGH -- it's a UDP Packet */ |
| 634 | } |
| 635 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 636 | /* |
| 637 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). |
| 638 | */ |
Wang Chen | b2bf1e2 | 2007-12-03 22:34:16 +1100 | [diff] [blame] | 639 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 640 | |
| 641 | if (up->pcrlen == 0) { /* full coverage was set */ |
| 642 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" |
| 643 | " %d while full coverage %d requested\n", |
| 644 | UDP_SKB_CB(skb)->cscov, skb->len); |
| 645 | goto drop; |
| 646 | } |
| 647 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { |
| 648 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " |
| 649 | "too small, need min %d\n", |
| 650 | UDP_SKB_CB(skb)->cscov, up->pcrlen); |
| 651 | goto drop; |
| 652 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | } |
| 654 | |
Eric Dumazet | 33d480c | 2011-08-11 19:30:52 +0000 | [diff] [blame] | 655 | if (rcu_access_pointer(sk->sk_filter)) { |
Herbert Xu | 1ab6eb6 | 2007-03-06 20:29:58 -0800 | [diff] [blame] | 656 | if (udp_lib_checksum_complete(skb)) |
Eric Dumazet | 6a5dc9e | 2013-04-29 08:39:56 +0000 | [diff] [blame] | 657 | goto csum_error; |
Herbert Xu | 1ab6eb6 | 2007-03-06 20:29:58 -0800 | [diff] [blame] | 658 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 660 | if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) |
| 661 | goto drop; |
| 662 | |
Eric Dumazet | d826eb1 | 2011-11-09 07:24:35 +0000 | [diff] [blame] | 663 | skb_dst_drop(skb); |
Wang Chen | cb75994 | 2007-12-03 22:33:28 +1100 | [diff] [blame] | 664 | |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 665 | bh_lock_sock(sk); |
| 666 | rc = 0; |
| 667 | if (!sock_owned_by_user(sk)) |
| 668 | rc = __udpv6_queue_rcv_skb(sk, skb); |
| 669 | else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { |
| 670 | bh_unlock_sock(sk); |
| 671 | goto drop; |
| 672 | } |
| 673 | bh_unlock_sock(sk); |
Benjamin LaHaise | f7ad74f | 2012-04-27 08:23:21 +0000 | [diff] [blame] | 674 | |
| 675 | return rc; |
Eric Dumazet | 6a5dc9e | 2013-04-29 08:39:56 +0000 | [diff] [blame] | 676 | csum_error: |
| 677 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 678 | drop: |
Pavel Emelyanov | ef28d1a | 2008-07-05 21:19:40 -0700 | [diff] [blame] | 679 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 680 | atomic_inc(&sk->sk_drops); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 681 | kfree_skb(skb); |
| 682 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | } |
| 684 | |
Eric Dumazet | 920a461 | 2008-11-01 21:22:23 -0700 | [diff] [blame] | 685 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 686 | __be16 loc_port, const struct in6_addr *loc_addr, |
| 687 | __be16 rmt_port, const struct in6_addr *rmt_addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | int dif) |
| 689 | { |
Eric Dumazet | 88ab193 | 2008-11-16 19:39:21 -0800 | [diff] [blame] | 690 | struct hlist_nulls_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | struct sock *s = sk; |
| 692 | unsigned short num = ntohs(loc_port); |
| 693 | |
Eric Dumazet | 88ab193 | 2008-11-16 19:39:21 -0800 | [diff] [blame] | 694 | sk_nulls_for_each_from(s, node) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | struct inet_sock *inet = inet_sk(s); |
| 696 | |
Eric Dumazet | 920a461 | 2008-11-01 21:22:23 -0700 | [diff] [blame] | 697 | if (!net_eq(sock_net(s), net)) |
Daniel Lezcano | b8ad0cb | 2008-03-07 11:16:55 -0800 | [diff] [blame] | 698 | continue; |
| 699 | |
Eric Dumazet | d4cada4 | 2009-11-08 10:17:30 +0000 | [diff] [blame] | 700 | if (udp_sk(s)->udp_port_hash == num && |
| 701 | s->sk_family == PF_INET6) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 702 | if (inet->inet_dport) { |
| 703 | if (inet->inet_dport != rmt_port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | continue; |
| 705 | } |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 706 | if (!ipv6_addr_any(&sk->sk_v6_daddr) && |
| 707 | !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | continue; |
| 709 | |
| 710 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) |
| 711 | continue; |
| 712 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 713 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
| 714 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)) |
David L Stevens | 40796c5 | 2005-09-14 21:10:20 -0700 | [diff] [blame] | 715 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | } |
Stephen Hemminger | add459a | 2007-03-08 20:42:35 -0800 | [diff] [blame] | 717 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | continue; |
| 719 | return s; |
| 720 | } |
| 721 | } |
| 722 | return NULL; |
| 723 | } |
| 724 | |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 725 | static void flush_stack(struct sock **stack, unsigned int count, |
| 726 | struct sk_buff *skb, unsigned int final) |
| 727 | { |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 728 | struct sk_buff *skb1 = NULL; |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 729 | struct sock *sk; |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 730 | unsigned int i; |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 731 | |
| 732 | for (i = 0; i < count; i++) { |
Eric Dumazet | f6b8f32 | 2009-11-08 10:20:19 +0000 | [diff] [blame] | 733 | sk = stack[i]; |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 734 | if (likely(skb1 == NULL)) |
| 735 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); |
| 736 | if (!skb1) { |
| 737 | atomic_inc(&sk->sk_drops); |
| 738 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS, |
| 739 | IS_UDPLITE(sk)); |
| 740 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, |
| 741 | IS_UDPLITE(sk)); |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 742 | } |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 743 | |
| 744 | if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) |
| 745 | skb1 = NULL; |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 746 | } |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 747 | if (unlikely(skb1)) |
| 748 | kfree_skb(skb1); |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 749 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | /* |
| 751 | * Note: called only from the BH handler context, |
| 752 | * so we don't need to lock the hashes. |
| 753 | */ |
Pavel Emelyanov | e316349 | 2008-06-16 17:12:11 -0700 | [diff] [blame] | 754 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 755 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 756 | struct udp_table *udptable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | { |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 758 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
Arnaldo Carvalho de Melo | 4bedb45 | 2007-03-13 14:28:48 -0300 | [diff] [blame] | 759 | const struct udphdr *uh = udp_hdr(skb); |
Eric Dumazet | f86dcc5 | 2009-10-07 00:37:59 +0000 | [diff] [blame] | 760 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | int dif; |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 762 | unsigned int i, count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 764 | spin_lock(&hslot->lock); |
Eric Dumazet | 88ab193 | 2008-11-16 19:39:21 -0800 | [diff] [blame] | 765 | sk = sk_nulls_head(&hslot->head); |
YOSHIFUJI Hideaki | f2776ff | 2006-11-21 17:41:56 -0800 | [diff] [blame] | 766 | dif = inet6_iif(skb); |
Eric Dumazet | 920a461 | 2008-11-01 21:22:23 -0700 | [diff] [blame] | 767 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 768 | while (sk) { |
| 769 | stack[count++] = sk; |
| 770 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, |
| 771 | uh->source, saddr, dif); |
| 772 | if (unlikely(count == ARRAY_SIZE(stack))) { |
| 773 | if (!sk) |
| 774 | break; |
| 775 | flush_stack(stack, count, skb, ~0); |
| 776 | count = 0; |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 777 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | } |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 779 | /* |
| 780 | * before releasing the lock, we must take reference on sockets |
| 781 | */ |
| 782 | for (i = 0; i < count; i++) |
| 783 | sock_hold(stack[i]); |
| 784 | |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 785 | spin_unlock(&hslot->lock); |
Eric Dumazet | a1ab77f | 2009-11-08 10:18:52 +0000 | [diff] [blame] | 786 | |
| 787 | if (count) { |
| 788 | flush_stack(stack, count, skb, count - 1); |
| 789 | |
| 790 | for (i = 0; i < count; i++) |
| 791 | sock_put(stack[i]); |
| 792 | } else { |
| 793 | kfree_skb(skb); |
| 794 | } |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 795 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | } |
| 797 | |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 798 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 799 | int proto) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | { |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 801 | struct net *net = dev_net(skb->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | struct sock *sk; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 803 | struct udphdr *uh; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 804 | const struct in6_addr *saddr, *daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | u32 ulen = 0; |
| 806 | |
| 807 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) |
Bjørn Mork | d6bc014 | 2010-05-06 03:44:35 +0000 | [diff] [blame] | 808 | goto discard; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 810 | saddr = &ipv6_hdr(skb)->saddr; |
| 811 | daddr = &ipv6_hdr(skb)->daddr; |
Arnaldo Carvalho de Melo | 4bedb45 | 2007-03-13 14:28:48 -0300 | [diff] [blame] | 812 | uh = udp_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
| 814 | ulen = ntohs(uh->len); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 815 | if (ulen > skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | goto short_packet; |
| 817 | |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 818 | if (proto == IPPROTO_UDP) { |
| 819 | /* UDP validates ulen. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 821 | /* Check for jumbo payload */ |
| 822 | if (ulen == 0) |
| 823 | ulen = skb->len; |
| 824 | |
| 825 | if (ulen < sizeof(*uh)) |
| 826 | goto short_packet; |
| 827 | |
| 828 | if (ulen < skb->len) { |
| 829 | if (pskb_trim_rcsum(skb, ulen)) |
| 830 | goto short_packet; |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 831 | saddr = &ipv6_hdr(skb)->saddr; |
| 832 | daddr = &ipv6_hdr(skb)->daddr; |
Arnaldo Carvalho de Melo | 4bedb45 | 2007-03-13 14:28:48 -0300 | [diff] [blame] | 833 | uh = udp_hdr(skb); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 834 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | } |
| 836 | |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 837 | if (udp6_csum_init(skb, uh, proto)) |
Eric Dumazet | 6a5dc9e | 2013-04-29 08:39:56 +0000 | [diff] [blame] | 838 | goto csum_error; |
Herbert Xu | 759e5d0 | 2007-03-25 20:10:56 -0700 | [diff] [blame] | 839 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 840 | /* |
| 841 | * Multicast receive code |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | */ |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 843 | if (ipv6_addr_is_multicast(daddr)) |
Pavel Emelyanov | e316349 | 2008-06-16 17:12:11 -0700 | [diff] [blame] | 844 | return __udp6_lib_mcast_deliver(net, skb, |
| 845 | saddr, daddr, udptable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | |
| 847 | /* Unicast */ |
| 848 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 849 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | * check socket cache ... must talk to Alan about his plans |
| 851 | * for sock caches... i'll skip this for now. |
| 852 | */ |
KOVACS Krisztian | 607c4aa | 2008-10-07 12:38:32 -0700 | [diff] [blame] | 853 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 854 | if (sk != NULL) { |
Eliezer Tamir | a5b5047 | 2013-06-10 11:40:00 +0300 | [diff] [blame] | 855 | int ret; |
| 856 | |
Eliezer Tamir | a5b5047 | 2013-06-10 11:40:00 +0300 | [diff] [blame] | 857 | ret = udpv6_queue_rcv_skb(sk, skb); |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 858 | sock_put(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 860 | /* a return value > 0 means to resubmit the input, but |
| 861 | * it wants the return to be -protocol, or 0 |
| 862 | */ |
| 863 | if (ret > 0) |
| 864 | return -ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
Stephen Hemminger | add459a | 2007-03-08 20:42:35 -0800 | [diff] [blame] | 866 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 868 | |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 869 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
| 870 | goto discard; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 871 | |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 872 | if (udp_lib_checksum_complete(skb)) |
Eric Dumazet | 6a5dc9e | 2013-04-29 08:39:56 +0000 | [diff] [blame] | 873 | goto csum_error; |
Benjamin LaHaise | cb80ef4 | 2012-04-27 08:23:59 +0000 | [diff] [blame] | 874 | |
| 875 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); |
| 876 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
| 877 | |
| 878 | kfree_skb(skb); |
Stephen Hemminger | add459a | 2007-03-08 20:42:35 -0800 | [diff] [blame] | 879 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 881 | short_packet: |
Bjørn Mork | d6bc014 | 2010-05-06 03:44:35 +0000 | [diff] [blame] | 882 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
David S. Miller | db8dac2 | 2008-03-06 16:22:02 -0800 | [diff] [blame] | 883 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
Bjørn Mork | d6bc014 | 2010-05-06 03:44:35 +0000 | [diff] [blame] | 884 | saddr, |
| 885 | ntohs(uh->source), |
| 886 | ulen, |
| 887 | skb->len, |
| 888 | daddr, |
| 889 | ntohs(uh->dest)); |
Eric Dumazet | 6a5dc9e | 2013-04-29 08:39:56 +0000 | [diff] [blame] | 890 | goto discard; |
| 891 | csum_error: |
| 892 | UDP6_INC_STATS_BH(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | discard: |
Pavel Emelyanov | ef28d1a | 2008-07-05 21:19:40 -0700 | [diff] [blame] | 894 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | kfree_skb(skb); |
Stephen Hemminger | add459a | 2007-03-08 20:42:35 -0800 | [diff] [blame] | 896 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | } |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 898 | |
Herbert Xu | e5bbef2 | 2007-10-15 12:50:28 -0700 | [diff] [blame] | 899 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 900 | { |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 901 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 902 | } |
| 903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | /* |
| 905 | * Throw away all pending data and cancel the corking. Socket is locked. |
| 906 | */ |
| 907 | static void udp_v6_flush_pending_frames(struct sock *sk) |
| 908 | { |
| 909 | struct udp_sock *up = udp_sk(sk); |
| 910 | |
Denis V. Lunev | 36d926b | 2008-06-04 15:49:07 +0400 | [diff] [blame] | 911 | if (up->pending == AF_INET) |
| 912 | udp_flush_pending_frames(sk); |
| 913 | else if (up->pending) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | up->len = 0; |
| 915 | up->pending = 0; |
| 916 | ip6_flush_pending_frames(sk); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 917 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | } |
| 919 | |
Sridhar Samudrala | 493c6be | 2009-07-09 08:09:54 +0000 | [diff] [blame] | 920 | /** |
| 921 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming |
| 922 | * @sk: socket we are sending on |
| 923 | * @skb: sk_buff containing the filled-in UDP header |
| 924 | * (checksum field must be zeroed out) |
| 925 | */ |
| 926 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, |
| 927 | const struct in6_addr *saddr, |
| 928 | const struct in6_addr *daddr, int len) |
| 929 | { |
| 930 | unsigned int offset; |
| 931 | struct udphdr *uh = udp_hdr(skb); |
| 932 | __wsum csum = 0; |
| 933 | |
| 934 | if (skb_queue_len(&sk->sk_write_queue) == 1) { |
| 935 | /* Only one fragment on the socket. */ |
| 936 | skb->csum_start = skb_transport_header(skb) - skb->head; |
| 937 | skb->csum_offset = offsetof(struct udphdr, check); |
| 938 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); |
| 939 | } else { |
| 940 | /* |
| 941 | * HW-checksum won't work as there are two or more |
| 942 | * fragments on the socket so that all csums of sk_buffs |
| 943 | * should be together |
| 944 | */ |
| 945 | offset = skb_transport_offset(skb); |
| 946 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); |
| 947 | |
| 948 | skb->ip_summed = CHECKSUM_NONE; |
| 949 | |
| 950 | skb_queue_walk(&sk->sk_write_queue, skb) { |
| 951 | csum = csum_add(csum, skb->csum); |
| 952 | } |
| 953 | |
| 954 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, |
| 955 | csum); |
| 956 | if (uh->check == 0) |
| 957 | uh->check = CSUM_MANGLED_0; |
| 958 | } |
| 959 | } |
| 960 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | /* |
| 962 | * Sending |
| 963 | */ |
| 964 | |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 965 | static int udp_v6_push_pending_frames(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | { |
| 967 | struct sk_buff *skb; |
| 968 | struct udphdr *uh; |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 969 | struct udp_sock *up = udp_sk(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | struct inet_sock *inet = inet_sk(sk); |
Hannes Frederic Sowa | 8822b64 | 2013-07-01 20:21:30 +0200 | [diff] [blame] | 971 | struct flowi6 *fl6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | int err = 0; |
Wang Chen | b2bf1e2 | 2007-12-03 22:34:16 +1100 | [diff] [blame] | 973 | int is_udplite = IS_UDPLITE(sk); |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 974 | __wsum csum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
Hannes Frederic Sowa | 8822b64 | 2013-07-01 20:21:30 +0200 | [diff] [blame] | 976 | if (up->pending == AF_INET) |
| 977 | return udp_push_pending_frames(sk); |
| 978 | |
| 979 | fl6 = &inet->cork.fl.u.ip6; |
| 980 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | /* Grab the skbuff where UDP header space exists. */ |
| 982 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) |
| 983 | goto out; |
| 984 | |
| 985 | /* |
| 986 | * Create a UDP header |
| 987 | */ |
Arnaldo Carvalho de Melo | 4bedb45 | 2007-03-13 14:28:48 -0300 | [diff] [blame] | 988 | uh = udp_hdr(skb); |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 989 | uh->source = fl6->fl6_sport; |
| 990 | uh->dest = fl6->fl6_dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | uh->len = htons(up->len); |
| 992 | uh->check = 0; |
| 993 | |
Wang Chen | b2bf1e2 | 2007-12-03 22:34:16 +1100 | [diff] [blame] | 994 | if (is_udplite) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 995 | csum = udplite_csum_outgoing(sk, skb); |
Sridhar Samudrala | 493c6be | 2009-07-09 08:09:54 +0000 | [diff] [blame] | 996 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 997 | udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, |
Sridhar Samudrala | 493c6be | 2009-07-09 08:09:54 +0000 | [diff] [blame] | 998 | up->len); |
| 999 | goto send; |
| 1000 | } else |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1001 | csum = udp_csum_outgoing(sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1003 | /* add protocol-dependent pseudo-header */ |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1004 | uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
| 1005 | up->len, fl6->flowi6_proto, csum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | if (uh->check == 0) |
Al Viro | f6ab028 | 2006-11-16 02:36:50 -0800 | [diff] [blame] | 1007 | uh->check = CSUM_MANGLED_0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | |
Sridhar Samudrala | 493c6be | 2009-07-09 08:09:54 +0000 | [diff] [blame] | 1009 | send: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | err = ip6_push_pending_frames(sk); |
Eric Dumazet | 6ce9e7b | 2009-09-02 18:05:33 -0700 | [diff] [blame] | 1011 | if (err) { |
| 1012 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { |
| 1013 | UDP6_INC_STATS_USER(sock_net(sk), |
| 1014 | UDP_MIB_SNDBUFERRORS, is_udplite); |
| 1015 | err = 0; |
| 1016 | } |
| 1017 | } else |
| 1018 | UDP6_INC_STATS_USER(sock_net(sk), |
| 1019 | UDP_MIB_OUTDATAGRAMS, is_udplite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | out: |
| 1021 | up->len = 0; |
| 1022 | up->pending = 0; |
| 1023 | return err; |
| 1024 | } |
| 1025 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1026 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | struct msghdr *msg, size_t len) |
| 1028 | { |
| 1029 | struct ipv6_txoptions opt_space; |
| 1030 | struct udp_sock *up = udp_sk(sk); |
| 1031 | struct inet_sock *inet = inet_sk(sk); |
| 1032 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 1033 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 1034 | struct in6_addr *daddr, *final_p, final; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | struct ipv6_txoptions *opt = NULL; |
| 1036 | struct ip6_flowlabel *flowlabel = NULL; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1037 | struct flowi6 fl6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | struct dst_entry *dst; |
| 1039 | int addr_len = msg->msg_namelen; |
| 1040 | int ulen = len; |
| 1041 | int hlimit = -1; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 1042 | int tclass = -1; |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 1043 | int dontfrag = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
| 1045 | int err; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 1046 | int connected = 0; |
Wang Chen | b2bf1e2 | 2007-12-03 22:34:16 +1100 | [diff] [blame] | 1047 | int is_udplite = IS_UDPLITE(sk); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1048 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | |
| 1050 | /* destination address check */ |
| 1051 | if (sin6) { |
| 1052 | if (addr_len < offsetof(struct sockaddr, sa_data)) |
| 1053 | return -EINVAL; |
| 1054 | |
| 1055 | switch (sin6->sin6_family) { |
| 1056 | case AF_INET6: |
| 1057 | if (addr_len < SIN6_LEN_RFC2133) |
| 1058 | return -EINVAL; |
| 1059 | daddr = &sin6->sin6_addr; |
| 1060 | break; |
| 1061 | case AF_INET: |
| 1062 | goto do_udp_sendmsg; |
| 1063 | case AF_UNSPEC: |
| 1064 | msg->msg_name = sin6 = NULL; |
| 1065 | msg->msg_namelen = addr_len = 0; |
| 1066 | daddr = NULL; |
| 1067 | break; |
| 1068 | default: |
| 1069 | return -EINVAL; |
| 1070 | } |
| 1071 | } else if (!up->pending) { |
| 1072 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1073 | return -EDESTADDRREQ; |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 1074 | daddr = &sk->sk_v6_daddr; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1075 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | daddr = NULL; |
| 1077 | |
| 1078 | if (daddr) { |
Brian Haley | e773e4f | 2007-08-24 23:16:08 -0700 | [diff] [blame] | 1079 | if (ipv6_addr_v4mapped(daddr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | struct sockaddr_in sin; |
| 1081 | sin.sin_family = AF_INET; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1082 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
| 1084 | msg->msg_name = &sin; |
| 1085 | msg->msg_namelen = sizeof(sin); |
| 1086 | do_udp_sendmsg: |
| 1087 | if (__ipv6_only_sock(sk)) |
| 1088 | return -ENETUNREACH; |
| 1089 | return udp_sendmsg(iocb, sk, msg, len); |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | if (up->pending == AF_INET) |
| 1094 | return udp_sendmsg(iocb, sk, msg, len); |
| 1095 | |
| 1096 | /* Rough check on arithmetic overflow, |
YOSHIFUJI Hideaki | b59e139 | 2007-03-30 14:45:35 -0700 | [diff] [blame] | 1097 | better check is made in ip6_append_data(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | */ |
| 1099 | if (len > INT_MAX - sizeof(struct udphdr)) |
| 1100 | return -EMSGSIZE; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | if (up->pending) { |
| 1103 | /* |
| 1104 | * There are pending frames. |
| 1105 | * The socket lock must be held while it's corked. |
| 1106 | */ |
| 1107 | lock_sock(sk); |
| 1108 | if (likely(up->pending)) { |
| 1109 | if (unlikely(up->pending != AF_INET6)) { |
| 1110 | release_sock(sk); |
| 1111 | return -EAFNOSUPPORT; |
| 1112 | } |
| 1113 | dst = NULL; |
| 1114 | goto do_append_data; |
| 1115 | } |
| 1116 | release_sock(sk); |
| 1117 | } |
| 1118 | ulen += sizeof(struct udphdr); |
| 1119 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1120 | memset(&fl6, 0, sizeof(fl6)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
| 1122 | if (sin6) { |
| 1123 | if (sin6->sin6_port == 0) |
| 1124 | return -EINVAL; |
| 1125 | |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 1126 | fl6.fl6_dport = sin6->sin6_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | daddr = &sin6->sin6_addr; |
| 1128 | |
| 1129 | if (np->sndflow) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1130 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
| 1131 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { |
| 1132 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | if (flowlabel == NULL) |
| 1134 | return -EINVAL; |
| 1135 | daddr = &flowlabel->dst; |
| 1136 | } |
| 1137 | } |
| 1138 | |
| 1139 | /* |
| 1140 | * Otherwise it will be difficult to maintain |
| 1141 | * sk->sk_dst_cache. |
| 1142 | */ |
| 1143 | if (sk->sk_state == TCP_ESTABLISHED && |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 1144 | ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) |
| 1145 | daddr = &sk->sk_v6_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | if (addr_len >= sizeof(struct sockaddr_in6) && |
| 1148 | sin6->sin6_scope_id && |
Hannes Frederic Sowa | 842df07 | 2013-03-08 02:07:19 +0000 | [diff] [blame] | 1149 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1150 | fl6.flowi6_oif = sin6->sin6_scope_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | } else { |
| 1152 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1153 | return -EDESTADDRREQ; |
| 1154 | |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 1155 | fl6.fl6_dport = inet->inet_dport; |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 1156 | daddr = &sk->sk_v6_daddr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1157 | fl6.flowlabel = np->flow_label; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 1158 | connected = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | } |
| 1160 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1161 | if (!fl6.flowi6_oif) |
| 1162 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1164 | if (!fl6.flowi6_oif) |
| 1165 | fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; |
Yang Hongyang | 9f690db | 2008-12-16 02:08:29 -0800 | [diff] [blame] | 1166 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1167 | fl6.flowi6_mark = sk->sk_mark; |
Brian Haley | 51953d5 | 2009-10-05 08:24:16 +0000 | [diff] [blame] | 1168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | if (msg->msg_controllen) { |
| 1170 | opt = &opt_space; |
| 1171 | memset(opt, 0, sizeof(struct ipv6_txoptions)); |
| 1172 | opt->tot_len = sizeof(*opt); |
| 1173 | |
Tom Parkin | 73df66f | 2013-01-31 01:02:24 +0000 | [diff] [blame] | 1174 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
| 1175 | &hlimit, &tclass, &dontfrag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | if (err < 0) { |
| 1177 | fl6_sock_release(flowlabel); |
| 1178 | return err; |
| 1179 | } |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1180 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
| 1181 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | if (flowlabel == NULL) |
| 1183 | return -EINVAL; |
| 1184 | } |
| 1185 | if (!(opt->opt_nflen|opt->opt_flen)) |
| 1186 | opt = NULL; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 1187 | connected = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | } |
| 1189 | if (opt == NULL) |
| 1190 | opt = np->opt; |
YOSHIFUJI Hideaki | df9890c | 2005-11-20 12:23:18 +0900 | [diff] [blame] | 1191 | if (flowlabel) |
| 1192 | opt = fl6_merge_options(&opt_space, flowlabel, opt); |
| 1193 | opt = ipv6_fixup_options(&opt_space, opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1195 | fl6.flowi6_proto = sk->sk_protocol; |
Brian Haley | 876c7f4 | 2008-04-11 00:38:24 -0400 | [diff] [blame] | 1196 | if (!ipv6_addr_any(daddr)) |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1197 | fl6.daddr = *daddr; |
Brian Haley | 876c7f4 | 2008-04-11 00:38:24 -0400 | [diff] [blame] | 1198 | else |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1199 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
| 1200 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1201 | fl6.saddr = np->saddr; |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 1202 | fl6.fl6_sport = inet->inet_sport; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 1203 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1204 | final_p = fl6_update_dst(&fl6, opt, &final); |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 1205 | if (final_p) |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 1206 | connected = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1208 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { |
| 1209 | fl6.flowi6_oif = np->mcast_oif; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 1210 | connected = 0; |
Erich E. Hoover | c4062df | 2012-02-08 09:11:08 +0000 | [diff] [blame] | 1211 | } else if (!fl6.flowi6_oif) |
| 1212 | fl6.flowi6_oif = np->ucast_oif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1214 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
Venkat Yekkirala | beb8d13 | 2006-08-04 23:12:42 -0700 | [diff] [blame] | 1215 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1216 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 1217 | if (IS_ERR(dst)) { |
| 1218 | err = PTR_ERR(dst); |
| 1219 | dst = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | goto out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 1221 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | |
| 1223 | if (hlimit < 0) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1224 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | hlimit = np->mcast_hops; |
| 1226 | else |
| 1227 | hlimit = np->hop_limit; |
| 1228 | if (hlimit < 0) |
YOSHIFUJI Hideaki | 6b75d09 | 2008-03-10 06:00:30 -0400 | [diff] [blame] | 1229 | hlimit = ip6_dst_hoplimit(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | } |
| 1231 | |
Gerrit Renker | e651f03 | 2009-08-09 08:12:48 +0000 | [diff] [blame] | 1232 | if (tclass < 0) |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 1233 | tclass = np->tclass; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 1234 | |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 1235 | if (dontfrag < 0) |
| 1236 | dontfrag = np->dontfrag; |
| 1237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | if (msg->msg_flags&MSG_CONFIRM) |
| 1239 | goto do_confirm; |
| 1240 | back_from_confirm: |
| 1241 | |
| 1242 | lock_sock(sk); |
| 1243 | if (unlikely(up->pending)) { |
| 1244 | /* The socket is already corked while preparing it. */ |
| 1245 | /* ... which is an evident application bug. --ANK */ |
| 1246 | release_sock(sk); |
| 1247 | |
Patrick McHardy | 64ce207 | 2005-08-09 20:50:53 -0700 | [diff] [blame] | 1248 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | err = -EINVAL; |
| 1250 | goto out; |
| 1251 | } |
| 1252 | |
| 1253 | up->pending = AF_INET6; |
| 1254 | |
| 1255 | do_append_data: |
| 1256 | up->len += ulen; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1257 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
| 1258 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1259 | sizeof(struct udphdr), hlimit, tclass, opt, &fl6, |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 1260 | (struct rt6_info*)dst, |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 1261 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | if (err) |
| 1263 | udp_v6_flush_pending_frames(sk); |
| 1264 | else if (!corkreq) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 1265 | err = udp_v6_push_pending_frames(sk); |
Herbert Xu | 1e0c14f | 2006-10-03 14:35:49 -0700 | [diff] [blame] | 1266 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
| 1267 | up->pending = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | |
David S. Miller | a5e7c21 | 2005-10-03 14:21:58 -0700 | [diff] [blame] | 1269 | if (dst) { |
| 1270 | if (connected) { |
| 1271 | ip6_dst_store(sk, dst, |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 1272 | ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? |
| 1273 | &sk->sk_v6_daddr : NULL, |
YOSHIFUJI Hideaki | 8e1ef0a | 2006-08-29 17:15:09 -0700 | [diff] [blame] | 1274 | #ifdef CONFIG_IPV6_SUBTREES |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 1275 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
YOSHIFUJI Hideaki | 8e1ef0a | 2006-08-29 17:15:09 -0700 | [diff] [blame] | 1276 | &np->saddr : |
| 1277 | #endif |
| 1278 | NULL); |
David S. Miller | a5e7c21 | 2005-10-03 14:21:58 -0700 | [diff] [blame] | 1279 | } else { |
| 1280 | dst_release(dst); |
| 1281 | } |
YOSHIFUJI Hideaki | a3c9608 | 2008-06-04 01:30:25 +0900 | [diff] [blame] | 1282 | dst = NULL; |
David S. Miller | a5e7c21 | 2005-10-03 14:21:58 -0700 | [diff] [blame] | 1283 | } |
| 1284 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | if (err > 0) |
| 1286 | err = np->recverr ? net_xmit_errno(err) : 0; |
| 1287 | release_sock(sk); |
| 1288 | out: |
YOSHIFUJI Hideaki | a3c9608 | 2008-06-04 01:30:25 +0900 | [diff] [blame] | 1289 | dst_release(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | fl6_sock_release(flowlabel); |
YOSHIFUJI Hideaki | cd562c9 | 2007-09-14 17:15:01 -0700 | [diff] [blame] | 1291 | if (!err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | return len; |
David S. Miller | a18135e | 2006-08-15 00:00:09 -0700 | [diff] [blame] | 1293 | /* |
| 1294 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting |
| 1295 | * ENOBUFS might not be good (it's not tunable per se), but otherwise |
| 1296 | * we don't have a good statistic (IpOutDiscards but it can be too many |
| 1297 | * things). We could add another new stat but at least for now that |
| 1298 | * seems like overkill. |
| 1299 | */ |
| 1300 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { |
Pavel Emelyanov | 235b9f7 | 2008-07-05 21:19:20 -0700 | [diff] [blame] | 1301 | UDP6_INC_STATS_USER(sock_net(sk), |
| 1302 | UDP_MIB_SNDBUFERRORS, is_udplite); |
David S. Miller | a18135e | 2006-08-15 00:00:09 -0700 | [diff] [blame] | 1303 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | return err; |
| 1305 | |
| 1306 | do_confirm: |
| 1307 | dst_confirm(dst); |
| 1308 | if (!(msg->msg_flags&MSG_PROBE) || len) |
| 1309 | goto back_from_confirm; |
| 1310 | err = 0; |
| 1311 | goto out; |
| 1312 | } |
| 1313 | |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 1314 | void udpv6_destroy_sock(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | { |
Tom Parkin | 44046a5 | 2013-03-19 06:11:12 +0000 | [diff] [blame] | 1316 | struct udp_sock *up = udp_sk(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | lock_sock(sk); |
| 1318 | udp_v6_flush_pending_frames(sk); |
| 1319 | release_sock(sk); |
| 1320 | |
Tom Parkin | 44046a5 | 2013-03-19 06:11:12 +0000 | [diff] [blame] | 1321 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
| 1322 | void (*encap_destroy)(struct sock *sk); |
| 1323 | encap_destroy = ACCESS_ONCE(up->encap_destroy); |
| 1324 | if (encap_destroy) |
| 1325 | encap_destroy(sk); |
| 1326 | } |
| 1327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | inet6_destroy_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | } |
| 1330 | |
| 1331 | /* |
| 1332 | * Socket option code for UDP |
| 1333 | */ |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1334 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1335 | char __user *optval, unsigned int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1336 | { |
David S. Miller | db8dac2 | 2008-03-06 16:22:02 -0800 | [diff] [blame] | 1337 | if (level == SOL_UDP || level == SOL_UDPLITE) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 1338 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
| 1339 | udp_v6_push_pending_frames); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1340 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1341 | } |
| 1342 | |
| 1343 | #ifdef CONFIG_COMPAT |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1344 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1345 | char __user *optval, unsigned int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1346 | { |
David S. Miller | db8dac2 | 2008-03-06 16:22:02 -0800 | [diff] [blame] | 1347 | if (level == SOL_UDP || level == SOL_UDPLITE) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 1348 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
| 1349 | udp_v6_push_pending_frames); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1350 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1351 | } |
| 1352 | #endif |
| 1353 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1354 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
| 1355 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1356 | { |
David S. Miller | db8dac2 | 2008-03-06 16:22:02 -0800 | [diff] [blame] | 1357 | if (level == SOL_UDP || level == SOL_UDPLITE) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 1358 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1359 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1360 | } |
| 1361 | |
| 1362 | #ifdef CONFIG_COMPAT |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1363 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
| 1364 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1365 | { |
David S. Miller | db8dac2 | 2008-03-06 16:22:02 -0800 | [diff] [blame] | 1366 | if (level == SOL_UDP || level == SOL_UDPLITE) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 1367 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1368 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1369 | } |
| 1370 | #endif |
| 1371 | |
Alexey Dobriyan | 41135cc | 2009-09-14 12:22:28 +0000 | [diff] [blame] | 1372 | static const struct inet6_protocol udpv6_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | .handler = udpv6_rcv, |
| 1374 | .err_handler = udpv6_err, |
| 1375 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
| 1376 | }; |
| 1377 | |
| 1378 | /* ------------------------------------------------------------------------ */ |
| 1379 | #ifdef CONFIG_PROC_FS |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1380 | int udp6_seq_show(struct seq_file *seq, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | { |
Lorenzo Colitti | 17ef66af | 2013-05-31 15:05:48 +0000 | [diff] [blame] | 1382 | if (v == SEQ_START_TOKEN) { |
| 1383 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); |
| 1384 | } else { |
| 1385 | int bucket = ((struct udp_iter_state *)seq->private)->bucket; |
| 1386 | struct inet_sock *inet = inet_sk(v); |
| 1387 | __u16 srcp = ntohs(inet->inet_sport); |
| 1388 | __u16 destp = ntohs(inet->inet_dport); |
| 1389 | ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); |
| 1390 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | return 0; |
| 1392 | } |
| 1393 | |
Arjan van de Ven | 73cb88e | 2011-10-30 06:46:30 +0000 | [diff] [blame] | 1394 | static const struct file_operations udp6_afinfo_seq_fops = { |
| 1395 | .owner = THIS_MODULE, |
| 1396 | .open = udp_seq_open, |
| 1397 | .read = seq_read, |
| 1398 | .llseek = seq_lseek, |
| 1399 | .release = seq_release_net |
| 1400 | }; |
| 1401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | .name = "udp6", |
| 1404 | .family = AF_INET6, |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 1405 | .udp_table = &udp_table, |
Arjan van de Ven | 73cb88e | 2011-10-30 06:46:30 +0000 | [diff] [blame] | 1406 | .seq_fops = &udp6_afinfo_seq_fops, |
Denis V. Lunev | dda6192 | 2008-03-28 18:24:26 -0700 | [diff] [blame] | 1407 | .seq_ops = { |
| 1408 | .show = udp6_seq_show, |
| 1409 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | }; |
| 1411 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1412 | int __net_init udp6_proc_init(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | { |
Daniel Lezcano | 0c96d8c | 2008-03-21 04:14:17 -0700 | [diff] [blame] | 1414 | return udp_proc_register(net, &udp6_seq_afinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | } |
| 1416 | |
Daniel Lezcano | 0c96d8c | 2008-03-21 04:14:17 -0700 | [diff] [blame] | 1417 | void udp6_proc_exit(struct net *net) { |
| 1418 | udp_proc_unregister(net, &udp6_seq_afinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | } |
| 1420 | #endif /* CONFIG_PROC_FS */ |
| 1421 | |
Eric Dumazet | f77d602 | 2013-05-09 10:28:16 +0000 | [diff] [blame] | 1422 | void udp_v6_clear_sk(struct sock *sk, int size) |
| 1423 | { |
| 1424 | struct inet_sock *inet = inet_sk(sk); |
| 1425 | |
| 1426 | /* we do not want to clear pinet6 field, because of RCU lookups */ |
| 1427 | sk_prot_clear_portaddr_nulls(sk, offsetof(struct inet_sock, pinet6)); |
| 1428 | |
| 1429 | size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6); |
| 1430 | memset(&inet->pinet6 + 1, 0, size); |
| 1431 | } |
| 1432 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | /* ------------------------------------------------------------------------ */ |
| 1434 | |
| 1435 | struct proto udpv6_prot = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1436 | .name = "UDPv6", |
| 1437 | .owner = THIS_MODULE, |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1438 | .close = udp_lib_close, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1439 | .connect = ip6_datagram_connect, |
| 1440 | .disconnect = udp_disconnect, |
| 1441 | .ioctl = udp_ioctl, |
| 1442 | .destroy = udpv6_destroy_sock, |
| 1443 | .setsockopt = udpv6_setsockopt, |
| 1444 | .getsockopt = udpv6_getsockopt, |
| 1445 | .sendmsg = udpv6_sendmsg, |
| 1446 | .recvmsg = udpv6_recvmsg, |
Benjamin LaHaise | f7ad74f | 2012-04-27 08:23:21 +0000 | [diff] [blame] | 1447 | .backlog_rcv = __udpv6_queue_rcv_skb, |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1448 | .hash = udp_lib_hash, |
| 1449 | .unhash = udp_lib_unhash, |
Eric Dumazet | 719f835 | 2010-09-08 05:08:44 +0000 | [diff] [blame] | 1450 | .rehash = udp_v6_rehash, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1451 | .get_port = udp_v6_get_port, |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 1452 | .memory_allocated = &udp_memory_allocated, |
| 1453 | .sysctl_mem = sysctl_udp_mem, |
| 1454 | .sysctl_wmem = &sysctl_udp_wmem_min, |
| 1455 | .sysctl_rmem = &sysctl_udp_rmem_min, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1456 | .obj_size = sizeof(struct udp6_sock), |
Eric Dumazet | 271b72c | 2008-10-29 02:11:14 -0700 | [diff] [blame] | 1457 | .slab_flags = SLAB_DESTROY_BY_RCU, |
Eric Dumazet | 645ca70 | 2008-10-29 01:41:45 -0700 | [diff] [blame] | 1458 | .h.udp_table = &udp_table, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1459 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1460 | .compat_setsockopt = compat_udpv6_setsockopt, |
| 1461 | .compat_getsockopt = compat_udpv6_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1462 | #endif |
Eric Dumazet | f77d602 | 2013-05-09 10:28:16 +0000 | [diff] [blame] | 1463 | .clear_sk = udp_v6_clear_sk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | }; |
| 1465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | static struct inet_protosw udpv6_protosw = { |
| 1467 | .type = SOCK_DGRAM, |
| 1468 | .protocol = IPPROTO_UDP, |
| 1469 | .prot = &udpv6_prot, |
| 1470 | .ops = &inet6_dgram_ops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | .no_check = UDP_CSUM_DEFAULT, |
| 1472 | .flags = INET_PROTOSW_PERMANENT, |
| 1473 | }; |
| 1474 | |
| 1475 | |
Daniel Lezcano | 7f4e486 | 2007-12-11 02:25:35 -0800 | [diff] [blame] | 1476 | int __init udpv6_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | { |
Daniel Lezcano | 7f4e486 | 2007-12-11 02:25:35 -0800 | [diff] [blame] | 1478 | int ret; |
| 1479 | |
Vlad Yasevich | 3336288 | 2012-11-15 08:49:15 +0000 | [diff] [blame] | 1480 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); |
| 1481 | if (ret) |
Vlad Yasevich | c6b641a | 2012-11-15 08:49:22 +0000 | [diff] [blame] | 1482 | goto out; |
Vlad Yasevich | 3336288 | 2012-11-15 08:49:15 +0000 | [diff] [blame] | 1483 | |
Daniel Lezcano | 7f4e486 | 2007-12-11 02:25:35 -0800 | [diff] [blame] | 1484 | ret = inet6_register_protosw(&udpv6_protosw); |
| 1485 | if (ret) |
| 1486 | goto out_udpv6_protocol; |
| 1487 | out: |
| 1488 | return ret; |
| 1489 | |
| 1490 | out_udpv6_protocol: |
| 1491 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); |
| 1492 | goto out; |
| 1493 | } |
| 1494 | |
Daniel Lezcano | 09f7709 | 2007-12-13 05:34:58 -0800 | [diff] [blame] | 1495 | void udpv6_exit(void) |
Daniel Lezcano | 7f4e486 | 2007-12-11 02:25:35 -0800 | [diff] [blame] | 1496 | { |
| 1497 | inet6_unregister_protosw(&udpv6_protosw); |
| 1498 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | } |