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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * UDP over IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Based on linux/ipv4/udp.c | |
9 | * | |
1da177e4 LT |
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 | ||
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/sockios.h> | |
1da177e4 LT |
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> | |
1781f7f5 | 35 | #include <linux/module.h> |
3305b80c | 36 | #include <linux/skbuff.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
7c0f6ba6 | 38 | #include <linux/uaccess.h> |
1da177e4 | 39 | |
496611d7 | 40 | #include <net/addrconf.h> |
1da177e4 LT |
41 | #include <net/ndisc.h> |
42 | #include <net/protocol.h> | |
43 | #include <net/transp_v6.h> | |
44 | #include <net/ip6_route.h> | |
1da177e4 | 45 | #include <net/raw.h> |
c752f073 | 46 | #include <net/tcp_states.h> |
1da177e4 LT |
47 | #include <net/ip6_checksum.h> |
48 | #include <net/xfrm.h> | |
72289b96 | 49 | #include <net/inet6_hashtables.h> |
076bb0c8 | 50 | #include <net/busy_poll.h> |
e32ea7e7 | 51 | #include <net/sock_reuseport.h> |
1da177e4 LT |
52 | |
53 | #include <linux/proc_fs.h> | |
54 | #include <linux/seq_file.h> | |
22911fc5 | 55 | #include <trace/events/skb.h> |
ba4e58ec | 56 | #include "udp_impl.h" |
1da177e4 | 57 | |
63a6fff3 RS |
58 | static bool udp6_lib_exact_dif_match(struct net *net, struct sk_buff *skb) |
59 | { | |
60 | #if defined(CONFIG_NET_L3_MASTER_DEV) | |
61 | if (!net->ipv4.sysctl_udp_l3mdev_accept && | |
62 | skb && ipv6_l3mdev_skb(IP6CB(skb)->flags)) | |
63 | return true; | |
64 | #endif | |
65 | return false; | |
66 | } | |
67 | ||
6eada011 ED |
68 | static u32 udp6_ehashfn(const struct net *net, |
69 | const struct in6_addr *laddr, | |
70 | const u16 lport, | |
71 | const struct in6_addr *faddr, | |
72 | const __be16 fport) | |
b50026b5 | 73 | { |
1bbdceef HFS |
74 | static u32 udp6_ehash_secret __read_mostly; |
75 | static u32 udp_ipv6_hash_secret __read_mostly; | |
76 | ||
77 | u32 lhash, fhash; | |
78 | ||
79 | net_get_random_once(&udp6_ehash_secret, | |
80 | sizeof(udp6_ehash_secret)); | |
81 | net_get_random_once(&udp_ipv6_hash_secret, | |
82 | sizeof(udp_ipv6_hash_secret)); | |
83 | ||
84 | lhash = (__force u32)laddr->s6_addr32[3]; | |
85 | fhash = __ipv6_addr_jhash(faddr, udp_ipv6_hash_secret); | |
86 | ||
b50026b5 | 87 | return __inet6_ehashfn(lhash, lport, fhash, fport, |
1bbdceef | 88 | udp_ipv6_hash_secret + net_hash_mix(net)); |
b50026b5 HFS |
89 | } |
90 | ||
6eada011 ED |
91 | static u32 udp6_portaddr_hash(const struct net *net, |
92 | const struct in6_addr *addr6, | |
93 | unsigned int port) | |
d4cada4a ED |
94 | { |
95 | unsigned int hash, mix = net_hash_mix(net); | |
96 | ||
97 | if (ipv6_addr_any(addr6)) | |
98 | hash = jhash_1word(0, mix); | |
856540ee | 99 | else if (ipv6_addr_v4mapped(addr6)) |
0eae88f3 | 100 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
d4cada4a | 101 | else |
0eae88f3 | 102 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
d4cada4a ED |
103 | |
104 | return hash ^ port; | |
105 | } | |
106 | ||
6ba5a3c5 | 107 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 108 | { |
30fff923 ED |
109 | unsigned int hash2_nulladdr = |
110 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); | |
9a52e97e | 111 | unsigned int hash2_partial = |
efe4208f | 112 | udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0); |
30fff923 | 113 | |
d4cada4a | 114 | /* precompute partial secondary hash */ |
30fff923 | 115 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
fe38d2a1 | 116 | return udp_lib_get_port(sk, snum, hash2_nulladdr); |
1da177e4 LT |
117 | } |
118 | ||
719f8358 ED |
119 | static void udp_v6_rehash(struct sock *sk) |
120 | { | |
121 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), | |
efe4208f | 122 | &sk->sk_v6_rcv_saddr, |
719f8358 ED |
123 | inet_sk(sk)->inet_num); |
124 | ||
125 | udp_lib_rehash(sk, new_hash); | |
126 | } | |
127 | ||
d1e37288 SX |
128 | static int compute_score(struct sock *sk, struct net *net, |
129 | const struct in6_addr *saddr, __be16 sport, | |
130 | const struct in6_addr *daddr, unsigned short hnum, | |
63a6fff3 | 131 | int dif, bool exact_dif) |
645ca708 | 132 | { |
60c04aec JP |
133 | int score; |
134 | struct inet_sock *inet; | |
135 | ||
136 | if (!net_eq(sock_net(sk), net) || | |
137 | udp_sk(sk)->udp_port_hash != hnum || | |
138 | sk->sk_family != PF_INET6) | |
139 | return -1; | |
140 | ||
141 | score = 0; | |
142 | inet = inet_sk(sk); | |
143 | ||
144 | if (inet->inet_dport) { | |
145 | if (inet->inet_dport != sport) | |
146 | return -1; | |
147 | score++; | |
148 | } | |
149 | ||
150 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { | |
151 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) | |
152 | return -1; | |
153 | score++; | |
154 | } | |
155 | ||
156 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { | |
157 | if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) | |
158 | return -1; | |
159 | score++; | |
160 | } | |
161 | ||
63a6fff3 | 162 | if (sk->sk_bound_dev_if || exact_dif) { |
60c04aec JP |
163 | if (sk->sk_bound_dev_if != dif) |
164 | return -1; | |
165 | score++; | |
645ca708 | 166 | } |
60c04aec | 167 | |
70da268b ED |
168 | if (sk->sk_incoming_cpu == raw_smp_processor_id()) |
169 | score++; | |
170 | ||
645ca708 ED |
171 | return score; |
172 | } | |
173 | ||
d1e37288 | 174 | /* called with rcu_read_lock() */ |
fddc17de ED |
175 | static struct sock *udp6_lib_lookup2(struct net *net, |
176 | const struct in6_addr *saddr, __be16 sport, | |
177 | const struct in6_addr *daddr, unsigned int hnum, int dif, | |
63a6fff3 | 178 | bool exact_dif, struct udp_hslot *hslot2, |
1134158b | 179 | struct sk_buff *skb) |
fddc17de ED |
180 | { |
181 | struct sock *sk, *result; | |
72289b96 TH |
182 | int score, badness, matches = 0, reuseport = 0; |
183 | u32 hash = 0; | |
fddc17de | 184 | |
fddc17de ED |
185 | result = NULL; |
186 | badness = -1; | |
ca065d0c | 187 | udp_portaddr_for_each_entry_rcu(sk, &hslot2->head) { |
d1e37288 | 188 | score = compute_score(sk, net, saddr, sport, |
63a6fff3 | 189 | daddr, hnum, dif, exact_dif); |
fddc17de | 190 | if (score > badness) { |
72289b96 TH |
191 | reuseport = sk->sk_reuseport; |
192 | if (reuseport) { | |
b50026b5 HFS |
193 | hash = udp6_ehashfn(net, daddr, hnum, |
194 | saddr, sport); | |
ed0dfffd | 195 | |
ca065d0c | 196 | result = reuseport_select_sock(sk, hash, skb, |
ed0dfffd | 197 | sizeof(struct udphdr)); |
ca065d0c ED |
198 | if (result) |
199 | return result; | |
72289b96 | 200 | matches = 1; |
70da268b | 201 | } |
ca065d0c ED |
202 | result = sk; |
203 | badness = score; | |
72289b96 TH |
204 | } else if (score == badness && reuseport) { |
205 | matches++; | |
8fc54f68 | 206 | if (reciprocal_scale(hash, matches) == 0) |
72289b96 TH |
207 | result = sk; |
208 | hash = next_pseudo_random32(hash); | |
fddc17de ED |
209 | } |
210 | } | |
fddc17de ED |
211 | return result; |
212 | } | |
213 | ||
ca065d0c | 214 | /* rcu_read_lock() must be held */ |
fce82338 | 215 | struct sock *__udp6_lib_lookup(struct net *net, |
88440ae7 BS |
216 | const struct in6_addr *saddr, __be16 sport, |
217 | const struct in6_addr *daddr, __be16 dport, | |
538950a1 CG |
218 | int dif, struct udp_table *udptable, |
219 | struct sk_buff *skb) | |
1da177e4 | 220 | { |
271b72c7 | 221 | struct sock *sk, *result; |
1da177e4 | 222 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
223 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
224 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
63a6fff3 | 225 | bool exact_dif = udp6_lib_exact_dif_match(net, skb); |
72289b96 TH |
226 | int score, badness, matches = 0, reuseport = 0; |
227 | u32 hash = 0; | |
645ca708 | 228 | |
fddc17de ED |
229 | if (hslot->count > 10) { |
230 | hash2 = udp6_portaddr_hash(net, daddr, hnum); | |
231 | slot2 = hash2 & udptable->mask; | |
232 | hslot2 = &udptable->hash2[slot2]; | |
233 | if (hslot->count < hslot2->count) | |
234 | goto begin; | |
235 | ||
236 | result = udp6_lib_lookup2(net, saddr, sport, | |
63a6fff3 | 237 | daddr, hnum, dif, exact_dif, |
d1e37288 | 238 | hslot2, skb); |
fddc17de | 239 | if (!result) { |
d1e37288 | 240 | unsigned int old_slot2 = slot2; |
fddc17de ED |
241 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); |
242 | slot2 = hash2 & udptable->mask; | |
d1e37288 SX |
243 | /* avoid searching the same slot again. */ |
244 | if (unlikely(slot2 == old_slot2)) | |
245 | return result; | |
246 | ||
fddc17de ED |
247 | hslot2 = &udptable->hash2[slot2]; |
248 | if (hslot->count < hslot2->count) | |
249 | goto begin; | |
250 | ||
1223c67c | 251 | result = udp6_lib_lookup2(net, saddr, sport, |
d1e37288 | 252 | daddr, hnum, dif, |
63a6fff3 RS |
253 | exact_dif, hslot2, |
254 | skb); | |
fddc17de | 255 | } |
fddc17de ED |
256 | return result; |
257 | } | |
271b72c7 ED |
258 | begin: |
259 | result = NULL; | |
260 | badness = -1; | |
ca065d0c | 261 | sk_for_each_rcu(sk, &hslot->head) { |
63a6fff3 RS |
262 | score = compute_score(sk, net, saddr, sport, daddr, hnum, dif, |
263 | exact_dif); | |
645ca708 | 264 | if (score > badness) { |
72289b96 TH |
265 | reuseport = sk->sk_reuseport; |
266 | if (reuseport) { | |
b50026b5 HFS |
267 | hash = udp6_ehashfn(net, daddr, hnum, |
268 | saddr, sport); | |
ca065d0c | 269 | result = reuseport_select_sock(sk, hash, skb, |
538950a1 | 270 | sizeof(struct udphdr)); |
ca065d0c ED |
271 | if (result) |
272 | return result; | |
72289b96 TH |
273 | matches = 1; |
274 | } | |
ca065d0c ED |
275 | result = sk; |
276 | badness = score; | |
72289b96 TH |
277 | } else if (score == badness && reuseport) { |
278 | matches++; | |
8fc54f68 | 279 | if (reciprocal_scale(hash, matches) == 0) |
72289b96 TH |
280 | result = sk; |
281 | hash = next_pseudo_random32(hash); | |
1da177e4 LT |
282 | } |
283 | } | |
1da177e4 LT |
284 | return result; |
285 | } | |
fce82338 | 286 | EXPORT_SYMBOL_GPL(__udp6_lib_lookup); |
1da177e4 | 287 | |
607c4aaf KK |
288 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
289 | __be16 sport, __be16 dport, | |
645ca708 | 290 | struct udp_table *udptable) |
607c4aaf | 291 | { |
b71d1d42 | 292 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
ed7cbbce | 293 | struct sock *sk; |
607c4aaf | 294 | |
e5d08d71 IM |
295 | sk = skb_steal_sock(skb); |
296 | if (unlikely(sk)) | |
23542618 | 297 | return sk; |
ed7cbbce | 298 | return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport, |
adf30907 | 299 | &iph->daddr, dport, inet6_iif(skb), |
538950a1 | 300 | udptable, skb); |
607c4aaf KK |
301 | } |
302 | ||
63058308 TH |
303 | struct sock *udp6_lib_lookup_skb(struct sk_buff *skb, |
304 | __be16 sport, __be16 dport) | |
305 | { | |
306 | const struct ipv6hdr *iph = ipv6_hdr(skb); | |
63058308 | 307 | |
ed7cbbce | 308 | return __udp6_lib_lookup(dev_net(skb->dev), &iph->saddr, sport, |
63058308 TH |
309 | &iph->daddr, dport, inet6_iif(skb), |
310 | &udp_table, skb); | |
311 | } | |
312 | EXPORT_SYMBOL_GPL(udp6_lib_lookup_skb); | |
313 | ||
ca065d0c ED |
314 | /* Must be called under rcu_read_lock(). |
315 | * Does increment socket refcount. | |
316 | */ | |
317 | #if IS_ENABLED(CONFIG_NETFILTER_XT_MATCH_SOCKET) || \ | |
30f58158 AB |
318 | IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TPROXY) || \ |
319 | IS_ENABLED(CONFIG_NF_SOCKET_IPV6) | |
aa976fc0 BS |
320 | struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, |
321 | const struct in6_addr *daddr, __be16 dport, int dif) | |
322 | { | |
ca065d0c ED |
323 | struct sock *sk; |
324 | ||
325 | sk = __udp6_lib_lookup(net, saddr, sport, daddr, dport, | |
326 | dif, &udp_table, NULL); | |
327 | if (sk && !atomic_inc_not_zero(&sk->sk_refcnt)) | |
328 | sk = NULL; | |
329 | return sk; | |
aa976fc0 BS |
330 | } |
331 | EXPORT_SYMBOL_GPL(udp6_lib_lookup); | |
ca065d0c | 332 | #endif |
aa976fc0 | 333 | |
1da177e4 | 334 | /* |
67ba4152 IM |
335 | * This should be easy, if there is something there we |
336 | * return it, otherwise we block. | |
1da177e4 LT |
337 | */ |
338 | ||
1b784140 | 339 | int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, |
1da177e4 LT |
340 | int noblock, int flags, int *addr_len) |
341 | { | |
342 | struct ipv6_pinfo *np = inet6_sk(sk); | |
343 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 344 | struct sk_buff *skb; |
59c2cdae | 345 | unsigned int ulen, copied; |
627d2d6b | 346 | int peeked, peeking, off; |
759e5d00 HX |
347 | int err; |
348 | int is_udplite = IS_UDPLITE(sk); | |
197c949e | 349 | bool checksum_valid = false; |
f26ba175 | 350 | int is_udp4; |
1da177e4 | 351 | |
1da177e4 | 352 | if (flags & MSG_ERRQUEUE) |
85fbaa75 | 353 | return ipv6_recv_error(sk, msg, len, addr_len); |
1da177e4 | 354 | |
4b340ae2 | 355 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
85fbaa75 | 356 | return ipv6_recv_rxpmtu(sk, msg, len, addr_len); |
4b340ae2 | 357 | |
1da177e4 | 358 | try_again: |
627d2d6b | 359 | peeking = off = sk_peek_offset(sk, flags); |
7c13f97f | 360 | skb = __skb_recv_udp(sk, flags, noblock, &peeked, &off, &err); |
1da177e4 | 361 | if (!skb) |
627d2d6b | 362 | return err; |
1da177e4 | 363 | |
e6afc8ac | 364 | ulen = skb->len; |
59c2cdae | 365 | copied = len; |
627d2d6b | 366 | if (copied > ulen - off) |
367 | copied = ulen - off; | |
59c2cdae | 368 | else if (copied < ulen) |
1ab1457c | 369 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 370 | |
f26ba175 WY |
371 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
372 | ||
ba4e58ec | 373 | /* |
759e5d00 HX |
374 | * If checksum is needed at all, try to do it while copying the |
375 | * data. If the data is truncated, or if we only want a partial | |
376 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 377 | */ |
ba4e58ec | 378 | |
d21dbdfe ED |
379 | if (copied < ulen || peeking || |
380 | (is_udplite && UDP_SKB_CB(skb)->partial_cov)) { | |
197c949e ED |
381 | checksum_valid = !udp_lib_checksum_complete(skb); |
382 | if (!checksum_valid) | |
1da177e4 | 383 | goto csum_copy_err; |
ba4e58ec GR |
384 | } |
385 | ||
197c949e | 386 | if (checksum_valid || skb_csum_unnecessary(skb)) |
627d2d6b | 387 | err = skb_copy_datagram_msg(skb, off, msg, copied); |
ba4e58ec | 388 | else { |
627d2d6b | 389 | err = skb_copy_and_csum_datagram_msg(skb, off, msg); |
1da177e4 LT |
390 | if (err == -EINVAL) |
391 | goto csum_copy_err; | |
392 | } | |
22911fc5 | 393 | if (unlikely(err)) { |
979402b1 ED |
394 | if (!peeked) { |
395 | atomic_inc(&sk->sk_drops); | |
396 | if (is_udp4) | |
6aef70a8 ED |
397 | UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, |
398 | is_udplite); | |
979402b1 | 399 | else |
6aef70a8 ED |
400 | UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, |
401 | is_udplite); | |
979402b1 | 402 | } |
850cbadd | 403 | kfree_skb(skb); |
627d2d6b | 404 | return err; |
22911fc5 | 405 | } |
f26ba175 WY |
406 | if (!peeked) { |
407 | if (is_udp4) | |
6aef70a8 ED |
408 | UDP_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, |
409 | is_udplite); | |
f26ba175 | 410 | else |
6aef70a8 ED |
411 | UDP6_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS, |
412 | is_udplite); | |
f26ba175 | 413 | } |
cb75994e | 414 | |
3b885787 | 415 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
416 | |
417 | /* Copy the address. */ | |
418 | if (msg->msg_name) { | |
342dfc30 | 419 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); |
1da177e4 | 420 | sin6->sin6_family = AF_INET6; |
4bedb452 | 421 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 | 422 | sin6->sin6_flowinfo = 0; |
1da177e4 | 423 | |
842df073 | 424 | if (is_udp4) { |
b301e82c BH |
425 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
426 | &sin6->sin6_addr); | |
842df073 HFS |
427 | sin6->sin6_scope_id = 0; |
428 | } else { | |
4e3fd7a0 | 429 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
842df073 HFS |
430 | sin6->sin6_scope_id = |
431 | ipv6_iface_scope_id(&sin6->sin6_addr, | |
4330487a | 432 | inet6_iif(skb)); |
1da177e4 | 433 | } |
bceaa902 | 434 | *addr_len = sizeof(*sin6); |
1da177e4 | 435 | } |
4b261c75 HFS |
436 | |
437 | if (np->rxopt.all) | |
438 | ip6_datagram_recv_common_ctl(sk, msg, skb); | |
439 | ||
f26ba175 | 440 | if (is_udp4) { |
1da177e4 | 441 | if (inet->cmsg_flags) |
ad959036 | 442 | ip_cmsg_recv_offset(msg, sk, skb, |
10df8e61 | 443 | sizeof(struct udphdr), off); |
1da177e4 LT |
444 | } else { |
445 | if (np->rxopt.all) | |
4b261c75 | 446 | ip6_datagram_recv_specific_ctl(sk, msg, skb); |
1ab1457c | 447 | } |
1da177e4 | 448 | |
59c2cdae | 449 | err = copied; |
1da177e4 | 450 | if (flags & MSG_TRUNC) |
759e5d00 | 451 | err = ulen; |
1da177e4 | 452 | |
850cbadd | 453 | skb_consume_udp(sk, skb, peeking ? -err : err); |
1da177e4 LT |
454 | return err; |
455 | ||
456 | csum_copy_err: | |
69629464 | 457 | if (!__sk_queue_drop_skb(sk, skb, flags, udp_skb_destructor)) { |
6a5dc9e5 | 458 | if (is_udp4) { |
6aef70a8 ED |
459 | UDP_INC_STATS(sock_net(sk), |
460 | UDP_MIB_CSUMERRORS, is_udplite); | |
461 | UDP_INC_STATS(sock_net(sk), | |
462 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 | 463 | } else { |
6aef70a8 ED |
464 | UDP6_INC_STATS(sock_net(sk), |
465 | UDP_MIB_CSUMERRORS, is_udplite); | |
466 | UDP6_INC_STATS(sock_net(sk), | |
467 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 | 468 | } |
0856f939 | 469 | } |
850cbadd | 470 | kfree_skb(skb); |
1da177e4 | 471 | |
beb39db5 ED |
472 | /* starting over for a new packet, but check if we need to yield */ |
473 | cond_resched(); | |
9cfaa8de | 474 | msg->msg_flags &= ~MSG_TRUNC; |
1da177e4 LT |
475 | goto try_again; |
476 | } | |
477 | ||
ba4e58ec | 478 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 479 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 480 | struct udp_table *udptable) |
1da177e4 LT |
481 | { |
482 | struct ipv6_pinfo *np; | |
b71d1d42 ED |
483 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
484 | const struct in6_addr *saddr = &hdr->saddr; | |
485 | const struct in6_addr *daddr = &hdr->daddr; | |
67ba4152 | 486 | struct udphdr *uh = (struct udphdr *)(skb->data+offset); |
1da177e4 | 487 | struct sock *sk; |
e0d8c1b7 | 488 | int harderr; |
1da177e4 | 489 | int err; |
7304fe46 | 490 | struct net *net = dev_net(skb->dev); |
1da177e4 | 491 | |
e32ea7e7 | 492 | sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source, |
538950a1 | 493 | inet6_iif(skb), udptable, skb); |
63159f29 | 494 | if (!sk) { |
a16292a0 ED |
495 | __ICMP6_INC_STATS(net, __in6_dev_get(skb->dev), |
496 | ICMP6_MIB_INERRORS); | |
1da177e4 | 497 | return; |
7304fe46 | 498 | } |
1da177e4 | 499 | |
e0d8c1b7 WW |
500 | harderr = icmpv6_err_convert(type, code, &err); |
501 | np = inet6_sk(sk); | |
502 | ||
93b36cf3 HFS |
503 | if (type == ICMPV6_PKT_TOOBIG) { |
504 | if (!ip6_sk_accept_pmtu(sk)) | |
505 | goto out; | |
81aded24 | 506 | ip6_sk_update_pmtu(skb, sk, info); |
e0d8c1b7 WW |
507 | if (np->pmtudisc != IPV6_PMTUDISC_DONT) |
508 | harderr = 1; | |
93b36cf3 | 509 | } |
1a462d18 | 510 | if (type == NDISC_REDIRECT) { |
ec18d9a2 | 511 | ip6_sk_redirect(skb, sk); |
1a462d18 DJ |
512 | goto out; |
513 | } | |
81aded24 | 514 | |
e0d8c1b7 WW |
515 | if (!np->recverr) { |
516 | if (!harderr || sk->sk_state != TCP_ESTABLISHED) | |
517 | goto out; | |
518 | } else { | |
1da177e4 | 519 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
e0d8c1b7 | 520 | } |
b1faf566 | 521 | |
1da177e4 LT |
522 | sk->sk_err = err; |
523 | sk->sk_error_report(sk); | |
524 | out: | |
ca065d0c | 525 | return; |
1da177e4 LT |
526 | } |
527 | ||
30c7be26 | 528 | int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
f7ad74fe BL |
529 | { |
530 | int rc; | |
531 | ||
efe4208f | 532 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
f7ad74fe | 533 | sock_rps_save_rxhash(sk, skb); |
005ec974 | 534 | sk_mark_napi_id(sk, skb); |
2c8c56e1 | 535 | sk_incoming_cpu_update(sk); |
e68b6e50 ED |
536 | } else { |
537 | sk_mark_napi_id_once(sk, skb); | |
005ec974 | 538 | } |
f7ad74fe | 539 | |
850cbadd | 540 | rc = __udp_enqueue_schedule_skb(sk, skb); |
f7ad74fe BL |
541 | if (rc < 0) { |
542 | int is_udplite = IS_UDPLITE(sk); | |
543 | ||
544 | /* Note that an ENOMEM error is charged twice */ | |
545 | if (rc == -ENOMEM) | |
e61da9e2 | 546 | UDP6_INC_STATS(sock_net(sk), |
02c22347 | 547 | UDP_MIB_RCVBUFERRORS, is_udplite); |
e61da9e2 | 548 | UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
f7ad74fe BL |
549 | kfree_skb(skb); |
550 | return -1; | |
551 | } | |
850cbadd | 552 | |
f7ad74fe BL |
553 | return 0; |
554 | } | |
555 | ||
ba4e58ec | 556 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba | 557 | struct inet6_skb_parm *opt, u8 type, |
67ba4152 | 558 | u8 code, int offset, __be32 info) |
ba4e58ec | 559 | { |
645ca708 | 560 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
561 | } |
562 | ||
d7f3f621 BL |
563 | static struct static_key udpv6_encap_needed __read_mostly; |
564 | void udpv6_encap_enable(void) | |
565 | { | |
566 | if (!static_key_enabled(&udpv6_encap_needed)) | |
567 | static_key_slow_inc(&udpv6_encap_needed); | |
568 | } | |
569 | EXPORT_SYMBOL(udpv6_encap_enable); | |
570 | ||
f7ad74fe | 571 | int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 572 | { |
ba4e58ec | 573 | struct udp_sock *up = udp_sk(sk); |
b2bf1e26 | 574 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 575 | |
ba4e58ec GR |
576 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
577 | goto drop; | |
1da177e4 | 578 | |
d7f3f621 BL |
579 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
580 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
581 | ||
582 | /* | |
583 | * This is an encapsulation socket so pass the skb to | |
584 | * the socket's udp_encap_rcv() hook. Otherwise, just | |
585 | * fall through and pass this up the UDP socket. | |
586 | * up->encap_rcv() returns the following value: | |
587 | * =0 if skb was successfully passed to the encap | |
588 | * handler or was discarded by it. | |
589 | * >0 if skb should be passed on to UDP. | |
590 | * <0 if skb should be resubmitted as proto -N | |
591 | */ | |
592 | ||
593 | /* if we're overly short, let UDP handle it */ | |
594 | encap_rcv = ACCESS_ONCE(up->encap_rcv); | |
e5aed006 | 595 | if (encap_rcv) { |
d7f3f621 BL |
596 | int ret; |
597 | ||
0a80966b TH |
598 | /* Verify checksum before giving to encap */ |
599 | if (udp_lib_checksum_complete(skb)) | |
600 | goto csum_error; | |
601 | ||
d7f3f621 BL |
602 | ret = encap_rcv(sk, skb); |
603 | if (ret <= 0) { | |
02c22347 ED |
604 | __UDP_INC_STATS(sock_net(sk), |
605 | UDP_MIB_INDATAGRAMS, | |
606 | is_udplite); | |
d7f3f621 BL |
607 | return -ret; |
608 | } | |
609 | } | |
610 | ||
611 | /* FALLTHROUGH -- it's a UDP Packet */ | |
612 | } | |
613 | ||
ba4e58ec GR |
614 | /* |
615 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
616 | */ | |
b2bf1e26 | 617 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
618 | |
619 | if (up->pcrlen == 0) { /* full coverage was set */ | |
ba7a46f1 JP |
620 | net_dbg_ratelimited("UDPLITE6: partial coverage %d while full coverage %d requested\n", |
621 | UDP_SKB_CB(skb)->cscov, skb->len); | |
ba4e58ec GR |
622 | goto drop; |
623 | } | |
624 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
ba7a46f1 JP |
625 | net_dbg_ratelimited("UDPLITE6: coverage %d too small, need min %d\n", |
626 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
ba4e58ec GR |
627 | goto drop; |
628 | } | |
1da177e4 LT |
629 | } |
630 | ||
ce25d66a ED |
631 | if (rcu_access_pointer(sk->sk_filter) && |
632 | udp_lib_checksum_complete(skb)) | |
633 | goto csum_error; | |
634 | ||
ba66bbe5 | 635 | if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr))) |
a6127697 | 636 | goto drop; |
ba4e58ec | 637 | |
e6afc8ac | 638 | udp_csum_pull_header(skb); |
cb80ef46 | 639 | |
d826eb14 | 640 | skb_dst_drop(skb); |
cb75994e | 641 | |
850cbadd | 642 | return __udpv6_queue_rcv_skb(sk, skb); |
3e215c8d | 643 | |
6a5dc9e5 | 644 | csum_error: |
02c22347 | 645 | __UDP6_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); |
ba4e58ec | 646 | drop: |
02c22347 | 647 | __UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
cb80ef46 | 648 | atomic_inc(&sk->sk_drops); |
ba4e58ec GR |
649 | kfree_skb(skb); |
650 | return -1; | |
1da177e4 LT |
651 | } |
652 | ||
5cf3d461 DH |
653 | static bool __udp_v6_is_mcast_sock(struct net *net, struct sock *sk, |
654 | __be16 loc_port, const struct in6_addr *loc_addr, | |
655 | __be16 rmt_port, const struct in6_addr *rmt_addr, | |
656 | int dif, unsigned short hnum) | |
1da177e4 | 657 | { |
5cf3d461 | 658 | struct inet_sock *inet = inet_sk(sk); |
1da177e4 | 659 | |
5cf3d461 DH |
660 | if (!net_eq(sock_net(sk), net)) |
661 | return false; | |
662 | ||
663 | if (udp_sk(sk)->udp_port_hash != hnum || | |
664 | sk->sk_family != PF_INET6 || | |
665 | (inet->inet_dport && inet->inet_dport != rmt_port) || | |
666 | (!ipv6_addr_any(&sk->sk_v6_daddr) && | |
667 | !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) || | |
33b4b015 HR |
668 | (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) || |
669 | (!ipv6_addr_any(&sk->sk_v6_rcv_saddr) && | |
670 | !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr))) | |
5cf3d461 DH |
671 | return false; |
672 | if (!inet6_mc_check(sk, loc_addr, rmt_addr)) | |
673 | return false; | |
674 | return true; | |
1da177e4 LT |
675 | } |
676 | ||
4068579e TH |
677 | static void udp6_csum_zero_error(struct sk_buff *skb) |
678 | { | |
679 | /* RFC 2460 section 8.1 says that we SHOULD log | |
680 | * this error. Well, it is reasonable. | |
681 | */ | |
ba7a46f1 JP |
682 | net_dbg_ratelimited("IPv6: udp checksum is 0 for [%pI6c]:%u->[%pI6c]:%u\n", |
683 | &ipv6_hdr(skb)->saddr, ntohs(udp_hdr(skb)->source), | |
684 | &ipv6_hdr(skb)->daddr, ntohs(udp_hdr(skb)->dest)); | |
4068579e TH |
685 | } |
686 | ||
1da177e4 LT |
687 | /* |
688 | * Note: called only from the BH handler context, | |
689 | * so we don't need to lock the hashes. | |
690 | */ | |
e3163493 | 691 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
b71d1d42 | 692 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
36cbb245 | 693 | struct udp_table *udptable, int proto) |
1da177e4 | 694 | { |
ca065d0c | 695 | struct sock *sk, *first = NULL; |
4bedb452 | 696 | const struct udphdr *uh = udp_hdr(skb); |
5cf3d461 DH |
697 | unsigned short hnum = ntohs(uh->dest); |
698 | struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum); | |
ca065d0c | 699 | unsigned int offset = offsetof(typeof(*sk), sk_node); |
2dc41cff | 700 | unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10); |
ca065d0c ED |
701 | int dif = inet6_iif(skb); |
702 | struct hlist_node *node; | |
703 | struct sk_buff *nskb; | |
2dc41cff DH |
704 | |
705 | if (use_hash2) { | |
706 | hash2_any = udp6_portaddr_hash(net, &in6addr_any, hnum) & | |
73e2d5e3 PN |
707 | udptable->mask; |
708 | hash2 = udp6_portaddr_hash(net, daddr, hnum) & udptable->mask; | |
2dc41cff | 709 | start_lookup: |
73e2d5e3 | 710 | hslot = &udptable->hash2[hash2]; |
2dc41cff DH |
711 | offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node); |
712 | } | |
1da177e4 | 713 | |
ca065d0c ED |
714 | sk_for_each_entry_offset_rcu(sk, node, &hslot->head, offset) { |
715 | if (!__udp_v6_is_mcast_sock(net, sk, uh->dest, daddr, | |
716 | uh->source, saddr, dif, hnum)) | |
717 | continue; | |
718 | /* If zero checksum and no_check is not on for | |
719 | * the socket then skip it. | |
720 | */ | |
721 | if (!uh->check && !udp_sk(sk)->no_check6_rx) | |
722 | continue; | |
723 | if (!first) { | |
724 | first = sk; | |
725 | continue; | |
726 | } | |
727 | nskb = skb_clone(skb, GFP_ATOMIC); | |
728 | if (unlikely(!nskb)) { | |
729 | atomic_inc(&sk->sk_drops); | |
02c22347 ED |
730 | __UDP6_INC_STATS(net, UDP_MIB_RCVBUFERRORS, |
731 | IS_UDPLITE(sk)); | |
732 | __UDP6_INC_STATS(net, UDP_MIB_INERRORS, | |
733 | IS_UDPLITE(sk)); | |
ca065d0c | 734 | continue; |
95766fff | 735 | } |
a1ab77f9 | 736 | |
ca065d0c ED |
737 | if (udpv6_queue_rcv_skb(sk, nskb) > 0) |
738 | consume_skb(nskb); | |
739 | } | |
a1ab77f9 | 740 | |
2dc41cff DH |
741 | /* Also lookup *:port if we are using hash2 and haven't done so yet. */ |
742 | if (use_hash2 && hash2 != hash2_any) { | |
743 | hash2 = hash2_any; | |
744 | goto start_lookup; | |
745 | } | |
746 | ||
ca065d0c ED |
747 | if (first) { |
748 | if (udpv6_queue_rcv_skb(first, skb) > 0) | |
749 | consume_skb(skb); | |
a1ab77f9 | 750 | } else { |
ca065d0c | 751 | kfree_skb(skb); |
02c22347 ED |
752 | __UDP6_INC_STATS(net, UDP_MIB_IGNOREDMULTI, |
753 | proto == IPPROTO_UDPLITE); | |
a1ab77f9 | 754 | } |
ba4e58ec | 755 | return 0; |
1da177e4 LT |
756 | } |
757 | ||
645ca708 | 758 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 759 | int proto) |
1da177e4 | 760 | { |
ca065d0c | 761 | const struct in6_addr *saddr, *daddr; |
3ffe533c | 762 | struct net *net = dev_net(skb->dev); |
1ab1457c | 763 | struct udphdr *uh; |
ca065d0c | 764 | struct sock *sk; |
1da177e4 LT |
765 | u32 ulen = 0; |
766 | ||
767 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 768 | goto discard; |
1da177e4 | 769 | |
0660e03f ACM |
770 | saddr = &ipv6_hdr(skb)->saddr; |
771 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 772 | uh = udp_hdr(skb); |
1da177e4 LT |
773 | |
774 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
775 | if (ulen > skb->len) |
776 | goto short_packet; | |
1da177e4 | 777 | |
759e5d00 HX |
778 | if (proto == IPPROTO_UDP) { |
779 | /* UDP validates ulen. */ | |
1da177e4 | 780 | |
ba4e58ec GR |
781 | /* Check for jumbo payload */ |
782 | if (ulen == 0) | |
783 | ulen = skb->len; | |
1da177e4 | 784 | |
ba4e58ec GR |
785 | if (ulen < sizeof(*uh)) |
786 | goto short_packet; | |
1da177e4 | 787 | |
ba4e58ec GR |
788 | if (ulen < skb->len) { |
789 | if (pskb_trim_rcsum(skb, ulen)) | |
790 | goto short_packet; | |
0660e03f ACM |
791 | saddr = &ipv6_hdr(skb)->saddr; |
792 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 793 | uh = udp_hdr(skb); |
ba4e58ec | 794 | } |
ba4e58ec | 795 | } |
1da177e4 | 796 | |
759e5d00 | 797 | if (udp6_csum_init(skb, uh, proto)) |
6a5dc9e5 | 798 | goto csum_error; |
759e5d00 | 799 | |
1ab1457c YH |
800 | /* |
801 | * Multicast receive code | |
1da177e4 | 802 | */ |
ba4e58ec | 803 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 | 804 | return __udp6_lib_mcast_deliver(net, skb, |
36cbb245 | 805 | saddr, daddr, udptable, proto); |
1da177e4 LT |
806 | |
807 | /* Unicast */ | |
808 | ||
1ab1457c | 809 | /* |
1da177e4 LT |
810 | * check socket cache ... must talk to Alan about his plans |
811 | * for sock caches... i'll skip this for now. | |
812 | */ | |
607c4aaf | 813 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
53b24b8f | 814 | if (sk) { |
a5b50476 ET |
815 | int ret; |
816 | ||
1c19448c | 817 | if (!uh->check && !udp_sk(sk)->no_check6_rx) { |
4068579e TH |
818 | udp6_csum_zero_error(skb); |
819 | goto csum_error; | |
820 | } | |
821 | ||
224d019c | 822 | if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk)) |
2abb7cdc TH |
823 | skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check, |
824 | ip6_compute_pseudo); | |
825 | ||
a5b50476 | 826 | ret = udpv6_queue_rcv_skb(sk, skb); |
1da177e4 | 827 | |
59dca1d8 | 828 | /* a return value > 0 means to resubmit the input */ |
cb80ef46 | 829 | if (ret > 0) |
59dca1d8 | 830 | return ret; |
1da177e4 | 831 | |
add459aa | 832 | return 0; |
1da177e4 | 833 | } |
1ab1457c | 834 | |
4068579e TH |
835 | if (!uh->check) { |
836 | udp6_csum_zero_error(skb); | |
837 | goto csum_error; | |
838 | } | |
839 | ||
cb80ef46 | 840 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
c377411f | 841 | goto discard; |
cb80ef46 BL |
842 | |
843 | if (udp_lib_checksum_complete(skb)) | |
6a5dc9e5 | 844 | goto csum_error; |
cb80ef46 | 845 | |
02c22347 | 846 | __UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); |
cb80ef46 BL |
847 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
848 | ||
849 | kfree_skb(skb); | |
add459aa | 850 | return 0; |
1da177e4 | 851 | |
1ab1457c | 852 | short_packet: |
ba7a46f1 JP |
853 | net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
854 | proto == IPPROTO_UDPLITE ? "-Lite" : "", | |
855 | saddr, ntohs(uh->source), | |
856 | ulen, skb->len, | |
857 | daddr, ntohs(uh->dest)); | |
6a5dc9e5 ED |
858 | goto discard; |
859 | csum_error: | |
02c22347 | 860 | __UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 861 | discard: |
02c22347 | 862 | __UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 863 | kfree_skb(skb); |
add459aa | 864 | return 0; |
1da177e4 | 865 | } |
ba4e58ec | 866 | |
e5bbef20 | 867 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 868 | { |
645ca708 | 869 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
870 | } |
871 | ||
1da177e4 LT |
872 | /* |
873 | * Throw away all pending data and cancel the corking. Socket is locked. | |
874 | */ | |
875 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
876 | { | |
877 | struct udp_sock *up = udp_sk(sk); | |
878 | ||
36d926b9 DL |
879 | if (up->pending == AF_INET) |
880 | udp_flush_pending_frames(sk); | |
881 | else if (up->pending) { | |
1da177e4 LT |
882 | up->len = 0; |
883 | up->pending = 0; | |
884 | ip6_flush_pending_frames(sk); | |
1ab1457c | 885 | } |
1da177e4 LT |
886 | } |
887 | ||
493c6be3 | 888 | /** |
67ba4152 IM |
889 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming |
890 | * @sk: socket we are sending on | |
891 | * @skb: sk_buff containing the filled-in UDP header | |
892 | * (checksum field must be zeroed out) | |
493c6be3 SS |
893 | */ |
894 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
895 | const struct in6_addr *saddr, | |
896 | const struct in6_addr *daddr, int len) | |
897 | { | |
898 | unsigned int offset; | |
899 | struct udphdr *uh = udp_hdr(skb); | |
d39d938c | 900 | struct sk_buff *frags = skb_shinfo(skb)->frag_list; |
493c6be3 SS |
901 | __wsum csum = 0; |
902 | ||
d39d938c | 903 | if (!frags) { |
493c6be3 SS |
904 | /* Only one fragment on the socket. */ |
905 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
906 | skb->csum_offset = offsetof(struct udphdr, check); | |
907 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
908 | } else { | |
909 | /* | |
910 | * HW-checksum won't work as there are two or more | |
911 | * fragments on the socket so that all csums of sk_buffs | |
912 | * should be together | |
913 | */ | |
914 | offset = skb_transport_offset(skb); | |
915 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
916 | ||
917 | skb->ip_summed = CHECKSUM_NONE; | |
918 | ||
d39d938c VY |
919 | do { |
920 | csum = csum_add(csum, frags->csum); | |
921 | } while ((frags = frags->next)); | |
493c6be3 SS |
922 | |
923 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
924 | csum); | |
925 | if (uh->check == 0) | |
926 | uh->check = CSUM_MANGLED_0; | |
927 | } | |
928 | } | |
929 | ||
1da177e4 LT |
930 | /* |
931 | * Sending | |
932 | */ | |
933 | ||
d39d938c | 934 | static int udp_v6_send_skb(struct sk_buff *skb, struct flowi6 *fl6) |
1da177e4 | 935 | { |
d39d938c | 936 | struct sock *sk = skb->sk; |
1da177e4 | 937 | struct udphdr *uh; |
1da177e4 | 938 | int err = 0; |
b2bf1e26 | 939 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 940 | __wsum csum = 0; |
d39d938c VY |
941 | int offset = skb_transport_offset(skb); |
942 | int len = skb->len - offset; | |
1da177e4 LT |
943 | |
944 | /* | |
945 | * Create a UDP header | |
946 | */ | |
4bedb452 | 947 | uh = udp_hdr(skb); |
1958b856 DM |
948 | uh->source = fl6->fl6_sport; |
949 | uh->dest = fl6->fl6_dport; | |
d39d938c | 950 | uh->len = htons(len); |
1da177e4 LT |
951 | uh->check = 0; |
952 | ||
b2bf1e26 | 953 | if (is_udplite) |
d39d938c VY |
954 | csum = udplite_csum(skb); |
955 | else if (udp_sk(sk)->no_check6_tx) { /* UDP csum disabled */ | |
4068579e TH |
956 | skb->ip_summed = CHECKSUM_NONE; |
957 | goto send; | |
958 | } else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ | |
d39d938c | 959 | udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, len); |
493c6be3 SS |
960 | goto send; |
961 | } else | |
d39d938c | 962 | csum = udp_csum(skb); |
1da177e4 | 963 | |
ba4e58ec | 964 | /* add protocol-dependent pseudo-header */ |
4c9483b2 | 965 | uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
d39d938c | 966 | len, fl6->flowi6_proto, csum); |
1da177e4 | 967 | if (uh->check == 0) |
f6ab0288 | 968 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 969 | |
493c6be3 | 970 | send: |
d39d938c | 971 | err = ip6_send_skb(skb); |
6ce9e7b5 ED |
972 | if (err) { |
973 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
6aef70a8 ED |
974 | UDP6_INC_STATS(sock_net(sk), |
975 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
6ce9e7b5 ED |
976 | err = 0; |
977 | } | |
6aef70a8 ED |
978 | } else { |
979 | UDP6_INC_STATS(sock_net(sk), | |
980 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
981 | } | |
d39d938c VY |
982 | return err; |
983 | } | |
984 | ||
985 | static int udp_v6_push_pending_frames(struct sock *sk) | |
986 | { | |
987 | struct sk_buff *skb; | |
988 | struct udp_sock *up = udp_sk(sk); | |
989 | struct flowi6 fl6; | |
990 | int err = 0; | |
991 | ||
992 | if (up->pending == AF_INET) | |
993 | return udp_push_pending_frames(sk); | |
994 | ||
995 | /* ip6_finish_skb will release the cork, so make a copy of | |
996 | * fl6 here. | |
997 | */ | |
998 | fl6 = inet_sk(sk)->cork.fl.u.ip6; | |
999 | ||
1000 | skb = ip6_finish_skb(sk); | |
1001 | if (!skb) | |
1002 | goto out; | |
1003 | ||
1004 | err = udp_v6_send_skb(skb, &fl6); | |
1005 | ||
1da177e4 LT |
1006 | out: |
1007 | up->len = 0; | |
1008 | up->pending = 0; | |
1009 | return err; | |
1010 | } | |
1011 | ||
1b784140 | 1012 | int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) |
1da177e4 LT |
1013 | { |
1014 | struct ipv6_txoptions opt_space; | |
1015 | struct udp_sock *up = udp_sk(sk); | |
1016 | struct inet_sock *inet = inet_sk(sk); | |
1017 | struct ipv6_pinfo *np = inet6_sk(sk); | |
342dfc30 | 1018 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, msg->msg_name); |
20c59de2 | 1019 | struct in6_addr *daddr, *final_p, final; |
1da177e4 | 1020 | struct ipv6_txoptions *opt = NULL; |
45f6fad8 | 1021 | struct ipv6_txoptions *opt_to_free = NULL; |
1da177e4 | 1022 | struct ip6_flowlabel *flowlabel = NULL; |
4c9483b2 | 1023 | struct flowi6 fl6; |
1da177e4 | 1024 | struct dst_entry *dst; |
26879da5 | 1025 | struct ipcm6_cookie ipc6; |
1da177e4 LT |
1026 | int addr_len = msg->msg_namelen; |
1027 | int ulen = len; | |
1da177e4 LT |
1028 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
1029 | int err; | |
987905de | 1030 | int connected = 0; |
b2bf1e26 | 1031 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 1032 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
ad1e46a8 | 1033 | struct sockcm_cookie sockc; |
1da177e4 | 1034 | |
26879da5 WW |
1035 | ipc6.hlimit = -1; |
1036 | ipc6.tclass = -1; | |
1037 | ipc6.dontfrag = -1; | |
d515684d | 1038 | sockc.tsflags = sk->sk_tsflags; |
26879da5 | 1039 | |
1da177e4 LT |
1040 | /* destination address check */ |
1041 | if (sin6) { | |
1042 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
1043 | return -EINVAL; | |
1044 | ||
1045 | switch (sin6->sin6_family) { | |
1046 | case AF_INET6: | |
1047 | if (addr_len < SIN6_LEN_RFC2133) | |
1048 | return -EINVAL; | |
1049 | daddr = &sin6->sin6_addr; | |
052d2369 JL |
1050 | if (ipv6_addr_any(daddr) && |
1051 | ipv6_addr_v4mapped(&np->saddr)) | |
1052 | ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), | |
1053 | daddr); | |
1da177e4 LT |
1054 | break; |
1055 | case AF_INET: | |
1056 | goto do_udp_sendmsg; | |
1057 | case AF_UNSPEC: | |
1058 | msg->msg_name = sin6 = NULL; | |
1059 | msg->msg_namelen = addr_len = 0; | |
1060 | daddr = NULL; | |
1061 | break; | |
1062 | default: | |
1063 | return -EINVAL; | |
1064 | } | |
1065 | } else if (!up->pending) { | |
1066 | if (sk->sk_state != TCP_ESTABLISHED) | |
1067 | return -EDESTADDRREQ; | |
efe4208f | 1068 | daddr = &sk->sk_v6_daddr; |
1ab1457c | 1069 | } else |
1da177e4 LT |
1070 | daddr = NULL; |
1071 | ||
1072 | if (daddr) { | |
e773e4fa | 1073 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
1074 | struct sockaddr_in sin; |
1075 | sin.sin_family = AF_INET; | |
c720c7e8 | 1076 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
1077 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
1078 | msg->msg_name = &sin; | |
1079 | msg->msg_namelen = sizeof(sin); | |
1080 | do_udp_sendmsg: | |
1081 | if (__ipv6_only_sock(sk)) | |
1082 | return -ENETUNREACH; | |
1b784140 | 1083 | return udp_sendmsg(sk, msg, len); |
1da177e4 LT |
1084 | } |
1085 | } | |
1086 | ||
1087 | if (up->pending == AF_INET) | |
1b784140 | 1088 | return udp_sendmsg(sk, msg, len); |
1da177e4 LT |
1089 | |
1090 | /* Rough check on arithmetic overflow, | |
b59e139b | 1091 | better check is made in ip6_append_data(). |
1da177e4 LT |
1092 | */ |
1093 | if (len > INT_MAX - sizeof(struct udphdr)) | |
1094 | return -EMSGSIZE; | |
1ab1457c | 1095 | |
03485f2a | 1096 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1da177e4 LT |
1097 | if (up->pending) { |
1098 | /* | |
1099 | * There are pending frames. | |
1100 | * The socket lock must be held while it's corked. | |
1101 | */ | |
1102 | lock_sock(sk); | |
1103 | if (likely(up->pending)) { | |
1104 | if (unlikely(up->pending != AF_INET6)) { | |
1105 | release_sock(sk); | |
1106 | return -EAFNOSUPPORT; | |
1107 | } | |
1108 | dst = NULL; | |
1109 | goto do_append_data; | |
1110 | } | |
1111 | release_sock(sk); | |
1112 | } | |
1113 | ulen += sizeof(struct udphdr); | |
1114 | ||
4c9483b2 | 1115 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 LT |
1116 | |
1117 | if (sin6) { | |
1118 | if (sin6->sin6_port == 0) | |
1119 | return -EINVAL; | |
1120 | ||
1958b856 | 1121 | fl6.fl6_dport = sin6->sin6_port; |
1da177e4 LT |
1122 | daddr = &sin6->sin6_addr; |
1123 | ||
1124 | if (np->sndflow) { | |
4c9483b2 DM |
1125 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1126 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
1127 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
63159f29 | 1128 | if (!flowlabel) |
1da177e4 | 1129 | return -EINVAL; |
1da177e4 LT |
1130 | } |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | * Otherwise it will be difficult to maintain | |
1135 | * sk->sk_dst_cache. | |
1136 | */ | |
1137 | if (sk->sk_state == TCP_ESTABLISHED && | |
efe4208f ED |
1138 | ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) |
1139 | daddr = &sk->sk_v6_daddr; | |
1da177e4 LT |
1140 | |
1141 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1142 | sin6->sin6_scope_id && | |
842df073 | 1143 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
4c9483b2 | 1144 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 LT |
1145 | } else { |
1146 | if (sk->sk_state != TCP_ESTABLISHED) | |
1147 | return -EDESTADDRREQ; | |
1148 | ||
1958b856 | 1149 | fl6.fl6_dport = inet->inet_dport; |
efe4208f | 1150 | daddr = &sk->sk_v6_daddr; |
4c9483b2 | 1151 | fl6.flowlabel = np->flow_label; |
987905de | 1152 | connected = 1; |
1da177e4 LT |
1153 | } |
1154 | ||
4c9483b2 DM |
1155 | if (!fl6.flowi6_oif) |
1156 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 | 1157 | |
4c9483b2 DM |
1158 | if (!fl6.flowi6_oif) |
1159 | fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; | |
9f690db7 | 1160 | |
4c9483b2 | 1161 | fl6.flowi6_mark = sk->sk_mark; |
e2d118a1 | 1162 | fl6.flowi6_uid = sk->sk_uid; |
51953d5b | 1163 | |
1da177e4 LT |
1164 | if (msg->msg_controllen) { |
1165 | opt = &opt_space; | |
1166 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1167 | opt->tot_len = sizeof(*opt); | |
26879da5 | 1168 | ipc6.opt = opt; |
1da177e4 | 1169 | |
26879da5 | 1170 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6, &sockc); |
1da177e4 LT |
1171 | if (err < 0) { |
1172 | fl6_sock_release(flowlabel); | |
1173 | return err; | |
1174 | } | |
4c9483b2 DM |
1175 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1176 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
63159f29 | 1177 | if (!flowlabel) |
1da177e4 LT |
1178 | return -EINVAL; |
1179 | } | |
1180 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1181 | opt = NULL; | |
987905de | 1182 | connected = 0; |
1da177e4 | 1183 | } |
45f6fad8 ED |
1184 | if (!opt) { |
1185 | opt = txopt_get(np); | |
1186 | opt_to_free = opt; | |
1187 | } | |
df9890c3 YH |
1188 | if (flowlabel) |
1189 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1190 | opt = ipv6_fixup_options(&opt_space, opt); | |
26879da5 | 1191 | ipc6.opt = opt; |
1da177e4 | 1192 | |
4c9483b2 | 1193 | fl6.flowi6_proto = sk->sk_protocol; |
876c7f41 | 1194 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 1195 | fl6.daddr = *daddr; |
876c7f41 | 1196 | else |
4c9483b2 DM |
1197 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
1198 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 1199 | fl6.saddr = np->saddr; |
1958b856 | 1200 | fl6.fl6_sport = inet->inet_sport; |
1ab1457c | 1201 | |
4c9483b2 | 1202 | final_p = fl6_update_dst(&fl6, opt, &final); |
20c59de2 | 1203 | if (final_p) |
987905de | 1204 | connected = 0; |
1da177e4 | 1205 | |
4c9483b2 DM |
1206 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { |
1207 | fl6.flowi6_oif = np->mcast_oif; | |
987905de | 1208 | connected = 0; |
c4062dfc EH |
1209 | } else if (!fl6.flowi6_oif) |
1210 | fl6.flowi6_oif = np->ucast_oif; | |
1da177e4 | 1211 | |
4c9483b2 | 1212 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
beb8d13b | 1213 | |
38b7097b HFS |
1214 | if (ipc6.tclass < 0) |
1215 | ipc6.tclass = np->tclass; | |
1216 | ||
1217 | fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel); | |
1218 | ||
0e0d44ab | 1219 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p); |
68d0c6d3 DM |
1220 | if (IS_ERR(dst)) { |
1221 | err = PTR_ERR(dst); | |
1222 | dst = NULL; | |
1da177e4 | 1223 | goto out; |
14e50e57 | 1224 | } |
1da177e4 | 1225 | |
26879da5 WW |
1226 | if (ipc6.hlimit < 0) |
1227 | ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst); | |
1da177e4 LT |
1228 | |
1229 | if (msg->msg_flags&MSG_CONFIRM) | |
1230 | goto do_confirm; | |
1231 | back_from_confirm: | |
1232 | ||
03485f2a VY |
1233 | /* Lockless fast path for the non-corking case */ |
1234 | if (!corkreq) { | |
1235 | struct sk_buff *skb; | |
1236 | ||
1237 | skb = ip6_make_skb(sk, getfrag, msg, ulen, | |
26879da5 | 1238 | sizeof(struct udphdr), &ipc6, |
03485f2a | 1239 | &fl6, (struct rt6_info *)dst, |
26879da5 | 1240 | msg->msg_flags, &sockc); |
03485f2a VY |
1241 | err = PTR_ERR(skb); |
1242 | if (!IS_ERR_OR_NULL(skb)) | |
1243 | err = udp_v6_send_skb(skb, &fl6); | |
1244 | goto release_dst; | |
1245 | } | |
1246 | ||
1da177e4 LT |
1247 | lock_sock(sk); |
1248 | if (unlikely(up->pending)) { | |
1249 | /* The socket is already corked while preparing it. */ | |
1250 | /* ... which is an evident application bug. --ANK */ | |
1251 | release_sock(sk); | |
1252 | ||
ba7a46f1 | 1253 | net_dbg_ratelimited("udp cork app bug 2\n"); |
1da177e4 LT |
1254 | err = -EINVAL; |
1255 | goto out; | |
1256 | } | |
1257 | ||
1258 | up->pending = AF_INET6; | |
1259 | ||
1260 | do_append_data: | |
26879da5 WW |
1261 | if (ipc6.dontfrag < 0) |
1262 | ipc6.dontfrag = np->dontfrag; | |
1da177e4 | 1263 | up->len += ulen; |
26879da5 WW |
1264 | err = ip6_append_data(sk, getfrag, msg, ulen, sizeof(struct udphdr), |
1265 | &ipc6, &fl6, (struct rt6_info *)dst, | |
1266 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, &sockc); | |
1da177e4 LT |
1267 | if (err) |
1268 | udp_v6_flush_pending_frames(sk); | |
1269 | else if (!corkreq) | |
4c0a6cb0 | 1270 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1271 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1272 | up->pending = 0; | |
1da177e4 | 1273 | |
03485f2a VY |
1274 | if (err > 0) |
1275 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1276 | release_sock(sk); | |
1277 | ||
1278 | release_dst: | |
a5e7c210 DM |
1279 | if (dst) { |
1280 | if (connected) { | |
1281 | ip6_dst_store(sk, dst, | |
efe4208f ED |
1282 | ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? |
1283 | &sk->sk_v6_daddr : NULL, | |
8e1ef0a9 | 1284 | #ifdef CONFIG_IPV6_SUBTREES |
4c9483b2 | 1285 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
8e1ef0a9 YH |
1286 | &np->saddr : |
1287 | #endif | |
1288 | NULL); | |
a5e7c210 DM |
1289 | } else { |
1290 | dst_release(dst); | |
1291 | } | |
a3c96089 | 1292 | dst = NULL; |
a5e7c210 DM |
1293 | } |
1294 | ||
1da177e4 | 1295 | out: |
a3c96089 | 1296 | dst_release(dst); |
1da177e4 | 1297 | fl6_sock_release(flowlabel); |
45f6fad8 | 1298 | txopt_put(opt_to_free); |
cd562c98 | 1299 | if (!err) |
1da177e4 | 1300 | return len; |
a18135eb DM |
1301 | /* |
1302 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1303 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1304 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1305 | * things). We could add another new stat but at least for now that | |
1306 | * seems like overkill. | |
1307 | */ | |
1308 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
6aef70a8 ED |
1309 | UDP6_INC_STATS(sock_net(sk), |
1310 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1311 | } |
1da177e4 LT |
1312 | return err; |
1313 | ||
1314 | do_confirm: | |
0dec879f JA |
1315 | if (msg->msg_flags & MSG_PROBE) |
1316 | dst_confirm_neigh(dst, &fl6.daddr); | |
1da177e4 LT |
1317 | if (!(msg->msg_flags&MSG_PROBE) || len) |
1318 | goto back_from_confirm; | |
1319 | err = 0; | |
1320 | goto out; | |
1321 | } | |
1322 | ||
7d06b2e0 | 1323 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 | 1324 | { |
44046a59 | 1325 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
1326 | lock_sock(sk); |
1327 | udp_v6_flush_pending_frames(sk); | |
1328 | release_sock(sk); | |
1329 | ||
44046a59 TP |
1330 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
1331 | void (*encap_destroy)(struct sock *sk); | |
1332 | encap_destroy = ACCESS_ONCE(up->encap_destroy); | |
1333 | if (encap_destroy) | |
1334 | encap_destroy(sk); | |
1335 | } | |
1336 | ||
1da177e4 | 1337 | inet6_destroy_sock(sk); |
1da177e4 LT |
1338 | } |
1339 | ||
1340 | /* | |
1341 | * Socket option code for UDP | |
1342 | */ | |
ba4e58ec | 1343 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1344 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1345 | { |
db8dac20 | 1346 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1347 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1348 | udp_v6_push_pending_frames); | |
ba4e58ec | 1349 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1350 | } |
1351 | ||
1352 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1353 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1354 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1355 | { |
db8dac20 | 1356 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1357 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1358 | udp_v6_push_pending_frames); | |
ba4e58ec | 1359 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1360 | } |
1361 | #endif | |
1362 | ||
ba4e58ec GR |
1363 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1364 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1365 | { |
db8dac20 | 1366 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1367 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1368 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1369 | } |
1370 | ||
1371 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1372 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1373 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1374 | { |
db8dac20 | 1375 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1376 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1377 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1378 | } |
1379 | #endif | |
1380 | ||
41135cc8 | 1381 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1382 | .handler = udpv6_rcv, |
1383 | .err_handler = udpv6_err, | |
1384 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1385 | }; | |
1386 | ||
1387 | /* ------------------------------------------------------------------------ */ | |
1388 | #ifdef CONFIG_PROC_FS | |
ba4e58ec | 1389 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 | 1390 | { |
17ef66af LC |
1391 | if (v == SEQ_START_TOKEN) { |
1392 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); | |
1393 | } else { | |
1394 | int bucket = ((struct udp_iter_state *)seq->private)->bucket; | |
1395 | struct inet_sock *inet = inet_sk(v); | |
1396 | __u16 srcp = ntohs(inet->inet_sport); | |
1397 | __u16 destp = ntohs(inet->inet_dport); | |
1398 | ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); | |
1399 | } | |
1da177e4 LT |
1400 | return 0; |
1401 | } | |
1402 | ||
73cb88ec AV |
1403 | static const struct file_operations udp6_afinfo_seq_fops = { |
1404 | .owner = THIS_MODULE, | |
1405 | .open = udp_seq_open, | |
1406 | .read = seq_read, | |
1407 | .llseek = seq_lseek, | |
1408 | .release = seq_release_net | |
1409 | }; | |
1410 | ||
1da177e4 | 1411 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1412 | .name = "udp6", |
1413 | .family = AF_INET6, | |
645ca708 | 1414 | .udp_table = &udp_table, |
73cb88ec | 1415 | .seq_fops = &udp6_afinfo_seq_fops, |
dda61925 DL |
1416 | .seq_ops = { |
1417 | .show = udp6_seq_show, | |
1418 | }, | |
1da177e4 LT |
1419 | }; |
1420 | ||
2c8c1e72 | 1421 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1422 | { |
0c96d8c5 | 1423 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1424 | } |
1425 | ||
ec120da6 IM |
1426 | void udp6_proc_exit(struct net *net) |
1427 | { | |
0c96d8c5 | 1428 | udp_proc_unregister(net, &udp6_seq_afinfo); |
1da177e4 LT |
1429 | } |
1430 | #endif /* CONFIG_PROC_FS */ | |
1431 | ||
1432 | /* ------------------------------------------------------------------------ */ | |
1433 | ||
1434 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1435 | .name = "UDPv6", |
1436 | .owner = THIS_MODULE, | |
ba4e58ec | 1437 | .close = udp_lib_close, |
543d9cfe ACM |
1438 | .connect = ip6_datagram_connect, |
1439 | .disconnect = udp_disconnect, | |
1440 | .ioctl = udp_ioctl, | |
850cbadd | 1441 | .init = udp_init_sock, |
543d9cfe ACM |
1442 | .destroy = udpv6_destroy_sock, |
1443 | .setsockopt = udpv6_setsockopt, | |
1444 | .getsockopt = udpv6_getsockopt, | |
1445 | .sendmsg = udpv6_sendmsg, | |
1446 | .recvmsg = udpv6_recvmsg, | |
e646b657 | 1447 | .release_cb = ip6_datagram_release_cb, |
ba4e58ec GR |
1448 | .hash = udp_lib_hash, |
1449 | .unhash = udp_lib_unhash, | |
719f8358 | 1450 | .rehash = udp_v6_rehash, |
543d9cfe | 1451 | .get_port = udp_v6_get_port, |
95766fff HA |
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, | |
543d9cfe | 1456 | .obj_size = sizeof(struct udp6_sock), |
645ca708 | 1457 | .h.udp_table = &udp_table, |
3fdadf7d | 1458 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1459 | .compat_setsockopt = compat_udpv6_setsockopt, |
1460 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1461 | #endif |
5d77dca8 | 1462 | .diag_destroy = udp_abort, |
1da177e4 LT |
1463 | }; |
1464 | ||
1da177e4 LT |
1465 | static struct inet_protosw udpv6_protosw = { |
1466 | .type = SOCK_DGRAM, | |
1467 | .protocol = IPPROTO_UDP, | |
1468 | .prot = &udpv6_prot, | |
1469 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1470 | .flags = INET_PROTOSW_PERMANENT, |
1471 | }; | |
1472 | ||
7f4e4868 | 1473 | int __init udpv6_init(void) |
1da177e4 | 1474 | { |
7f4e4868 DL |
1475 | int ret; |
1476 | ||
3336288a VY |
1477 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); |
1478 | if (ret) | |
c6b641a4 | 1479 | goto out; |
3336288a | 1480 | |
7f4e4868 DL |
1481 | ret = inet6_register_protosw(&udpv6_protosw); |
1482 | if (ret) | |
1483 | goto out_udpv6_protocol; | |
1484 | out: | |
1485 | return ret; | |
1486 | ||
1487 | out_udpv6_protocol: | |
1488 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1489 | goto out; | |
1490 | } | |
1491 | ||
09f7709f | 1492 | void udpv6_exit(void) |
7f4e4868 DL |
1493 | { |
1494 | inet6_unregister_protosw(&udpv6_protosw); | |
1495 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1496 | } |