Commit | Line | Data |
---|---|---|
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> |
1da177e4 LT |
38 | #include <asm/uaccess.h> |
39 | ||
1da177e4 LT |
40 | #include <net/ndisc.h> |
41 | #include <net/protocol.h> | |
42 | #include <net/transp_v6.h> | |
43 | #include <net/ip6_route.h> | |
1da177e4 | 44 | #include <net/raw.h> |
c752f073 | 45 | #include <net/tcp_states.h> |
1da177e4 LT |
46 | #include <net/ip6_checksum.h> |
47 | #include <net/xfrm.h> | |
72289b96 | 48 | #include <net/inet6_hashtables.h> |
076bb0c8 | 49 | #include <net/busy_poll.h> |
1da177e4 LT |
50 | |
51 | #include <linux/proc_fs.h> | |
52 | #include <linux/seq_file.h> | |
22911fc5 | 53 | #include <trace/events/skb.h> |
ba4e58ec | 54 | #include "udp_impl.h" |
1da177e4 | 55 | |
b50026b5 HFS |
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 | ||
b2f5e7cd VY |
68 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
69 | { | |
b2f5e7cd VY |
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); | |
efe4208f | 73 | int addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr); |
b2f5e7cd VY |
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) | |
499923c7 | 78 | return (!sk2_ipv6only && |
50805466 ED |
79 | (!sk->sk_rcv_saddr || !sk2->sk_rcv_saddr || |
80 | sk->sk_rcv_saddr == sk2->sk_rcv_saddr)); | |
b2f5e7cd VY |
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 && | |
efe4208f | 91 | ipv6_addr_equal(&sk->sk_v6_rcv_saddr, sk2_rcv_saddr6)) |
b2f5e7cd VY |
92 | return 1; |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
d4cada4a ED |
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); | |
856540ee | 105 | else if (ipv6_addr_v4mapped(addr6)) |
0eae88f3 | 106 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
d4cada4a | 107 | else |
0eae88f3 | 108 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
d4cada4a ED |
109 | |
110 | return hash ^ port; | |
111 | } | |
112 | ||
113 | ||
6ba5a3c5 | 114 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 115 | { |
30fff923 ED |
116 | unsigned int hash2_nulladdr = |
117 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); | |
9a52e97e | 118 | unsigned int hash2_partial = |
efe4208f | 119 | udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0); |
30fff923 | 120 | |
d4cada4a | 121 | /* precompute partial secondary hash */ |
30fff923 ED |
122 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
123 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); | |
1da177e4 LT |
124 | } |
125 | ||
719f8358 ED |
126 | static void udp_v6_rehash(struct sock *sk) |
127 | { | |
128 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), | |
efe4208f | 129 | &sk->sk_v6_rcv_saddr, |
719f8358 ED |
130 | inet_sk(sk)->inet_num); |
131 | ||
132 | udp_lib_rehash(sk, new_hash); | |
133 | } | |
134 | ||
645ca708 ED |
135 | static inline int compute_score(struct sock *sk, struct net *net, |
136 | unsigned short hnum, | |
88440ae7 BS |
137 | const struct in6_addr *saddr, __be16 sport, |
138 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 ED |
139 | int dif) |
140 | { | |
141 | int score = -1; | |
142 | ||
d4cada4a | 143 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
645ca708 | 144 | sk->sk_family == PF_INET6) { |
645ca708 ED |
145 | struct inet_sock *inet = inet_sk(sk); |
146 | ||
147 | score = 0; | |
c720c7e8 ED |
148 | if (inet->inet_dport) { |
149 | if (inet->inet_dport != sport) | |
645ca708 ED |
150 | return -1; |
151 | score++; | |
152 | } | |
efe4208f ED |
153 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
154 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) | |
645ca708 ED |
155 | return -1; |
156 | score++; | |
157 | } | |
efe4208f ED |
158 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
159 | if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) | |
645ca708 ED |
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 | ||
fddc17de ED |
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) { | |
fddc17de ED |
182 | struct inet_sock *inet = inet_sk(sk); |
183 | ||
efe4208f | 184 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) |
fddc17de ED |
185 | return -1; |
186 | score = 0; | |
187 | if (inet->inet_dport) { | |
188 | if (inet->inet_dport != sport) | |
189 | return -1; | |
190 | score++; | |
191 | } | |
efe4208f ED |
192 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
193 | if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) | |
fddc17de ED |
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 | ||
fddc17de ED |
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; | |
72289b96 TH |
215 | int score, badness, matches = 0, reuseport = 0; |
216 | u32 hash = 0; | |
fddc17de ED |
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; | |
72289b96 TH |
227 | reuseport = sk->sk_reuseport; |
228 | if (reuseport) { | |
b50026b5 HFS |
229 | hash = udp6_ehashfn(net, daddr, hnum, |
230 | saddr, sport); | |
72289b96 TH |
231 | matches = 1; |
232 | } else if (score == SCORE2_MAX) | |
fddc17de | 233 | goto exact_match; |
72289b96 TH |
234 | } else if (score == badness && reuseport) { |
235 | matches++; | |
236 | if (((u64)hash * matches) >> 32 == 0) | |
237 | result = sk; | |
238 | hash = next_pseudo_random32(hash); | |
fddc17de ED |
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: | |
c31504dc | 251 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
fddc17de ED |
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 | ||
fce82338 | 262 | struct sock *__udp6_lib_lookup(struct net *net, |
88440ae7 BS |
263 | const struct in6_addr *saddr, __be16 sport, |
264 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 | 265 | int dif, struct udp_table *udptable) |
1da177e4 | 266 | { |
271b72c7 | 267 | struct sock *sk, *result; |
88ab1932 | 268 | struct hlist_nulls_node *node; |
1da177e4 | 269 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
270 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
271 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
72289b96 TH |
272 | int score, badness, matches = 0, reuseport = 0; |
273 | u32 hash = 0; | |
645ca708 | 274 | |
271b72c7 | 275 | rcu_read_lock(); |
fddc17de ED |
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 | ||
1223c67c JBD |
293 | result = udp6_lib_lookup2(net, saddr, sport, |
294 | &in6addr_any, hnum, dif, | |
fddc17de ED |
295 | hslot2, slot2); |
296 | } | |
297 | rcu_read_unlock(); | |
298 | return result; | |
299 | } | |
271b72c7 ED |
300 | begin: |
301 | result = NULL; | |
302 | badness = -1; | |
88ab1932 | 303 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
304 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
305 | if (score > badness) { | |
306 | result = sk; | |
307 | badness = score; | |
72289b96 TH |
308 | reuseport = sk->sk_reuseport; |
309 | if (reuseport) { | |
b50026b5 HFS |
310 | hash = udp6_ehashfn(net, daddr, hnum, |
311 | saddr, sport); | |
72289b96 TH |
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); | |
1da177e4 LT |
319 | } |
320 | } | |
88ab1932 ED |
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 | */ | |
fddc17de | 326 | if (get_nulls_value(node) != slot) |
88ab1932 ED |
327 | goto begin; |
328 | ||
271b72c7 | 329 | if (result) { |
c31504dc | 330 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
271b72c7 ED |
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(); | |
1da177e4 LT |
339 | return result; |
340 | } | |
fce82338 | 341 | EXPORT_SYMBOL_GPL(__udp6_lib_lookup); |
1da177e4 | 342 | |
607c4aaf KK |
343 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
344 | __be16 sport, __be16 dport, | |
645ca708 | 345 | struct udp_table *udptable) |
607c4aaf | 346 | { |
23542618 | 347 | struct sock *sk; |
b71d1d42 | 348 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
607c4aaf | 349 | |
23542618 KK |
350 | if (unlikely(sk = skb_steal_sock(skb))) |
351 | return sk; | |
adf30907 ED |
352 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
353 | &iph->daddr, dport, inet6_iif(skb), | |
354 | udptable); | |
607c4aaf KK |
355 | } |
356 | ||
aa976fc0 BS |
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 | ||
1da177e4 LT |
365 | /* |
366 | * This should be easy, if there is something there we | |
367 | * return it, otherwise we block. | |
368 | */ | |
369 | ||
ba4e58ec | 370 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
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); | |
1ab1457c | 376 | struct sk_buff *skb; |
59c2cdae | 377 | unsigned int ulen, copied; |
3f518bf7 | 378 | int peeked, off = 0; |
759e5d00 HX |
379 | int err; |
380 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 381 | int is_udp4; |
8a74ad60 | 382 | bool slow; |
1da177e4 | 383 | |
1ab1457c | 384 | if (addr_len) |
3dde2598 | 385 | *addr_len = sizeof(struct sockaddr_in6); |
1ab1457c | 386 | |
1da177e4 LT |
387 | if (flags & MSG_ERRQUEUE) |
388 | return ipv6_recv_error(sk, msg, len); | |
389 | ||
4b340ae2 BH |
390 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
391 | return ipv6_recv_rxpmtu(sk, msg, len); | |
392 | ||
1da177e4 | 393 | try_again: |
a59322be | 394 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
3f518bf7 | 395 | &peeked, &off, &err); |
1da177e4 LT |
396 | if (!skb) |
397 | goto out; | |
398 | ||
759e5d00 | 399 | ulen = skb->len - sizeof(struct udphdr); |
59c2cdae DM |
400 | copied = len; |
401 | if (copied > ulen) | |
402 | copied = ulen; | |
403 | else if (copied < ulen) | |
1ab1457c | 404 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 405 | |
f26ba175 WY |
406 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
407 | ||
ba4e58ec | 408 | /* |
759e5d00 HX |
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. | |
ba4e58ec | 412 | */ |
ba4e58ec | 413 | |
59c2cdae | 414 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
759e5d00 | 415 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 416 | goto csum_copy_err; |
ba4e58ec GR |
417 | } |
418 | ||
60476372 | 419 | if (skb_csum_unnecessary(skb)) |
ba4e58ec | 420 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
22911fc5 | 421 | msg->msg_iov, copied); |
ba4e58ec | 422 | else { |
1da177e4 LT |
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 | } | |
22911fc5 ED |
427 | if (unlikely(err)) { |
428 | trace_kfree_skb(skb, udpv6_recvmsg); | |
979402b1 ED |
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 | } | |
1da177e4 | 440 | goto out_free; |
22911fc5 | 441 | } |
f26ba175 WY |
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 | } | |
cb75994e | 450 | |
3b885787 | 451 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
452 | |
453 | /* Copy the address. */ | |
454 | if (msg->msg_name) { | |
455 | struct sockaddr_in6 *sin6; | |
1ab1457c | 456 | |
1da177e4 LT |
457 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
458 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 459 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 | 460 | sin6->sin6_flowinfo = 0; |
1da177e4 | 461 | |
842df073 | 462 | if (is_udp4) { |
b301e82c BH |
463 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
464 | &sin6->sin6_addr); | |
842df073 HFS |
465 | sin6->sin6_scope_id = 0; |
466 | } else { | |
4e3fd7a0 | 467 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
842df073 HFS |
468 | sin6->sin6_scope_id = |
469 | ipv6_iface_scope_id(&sin6->sin6_addr, | |
470 | IP6CB(skb)->iif); | |
1da177e4 LT |
471 | } |
472 | ||
473 | } | |
f26ba175 | 474 | if (is_udp4) { |
1da177e4 LT |
475 | if (inet->cmsg_flags) |
476 | ip_cmsg_recv(msg, skb); | |
477 | } else { | |
478 | if (np->rxopt.all) | |
73df66f8 | 479 | ip6_datagram_recv_ctl(sk, msg, skb); |
1ab1457c | 480 | } |
1da177e4 | 481 | |
59c2cdae | 482 | err = copied; |
1da177e4 | 483 | if (flags & MSG_TRUNC) |
759e5d00 | 484 | err = ulen; |
1da177e4 LT |
485 | |
486 | out_free: | |
9d410c79 | 487 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
488 | out: |
489 | return err; | |
490 | ||
491 | csum_copy_err: | |
8a74ad60 | 492 | slow = lock_sock_fast(sk); |
0856f939 | 493 | if (!skb_kill_datagram(sk, skb, flags)) { |
6a5dc9e5 ED |
494 | if (is_udp4) { |
495 | UDP_INC_STATS_USER(sock_net(sk), | |
496 | UDP_MIB_CSUMERRORS, is_udplite); | |
0856f939 WY |
497 | UDP_INC_STATS_USER(sock_net(sk), |
498 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 ED |
499 | } else { |
500 | UDP6_INC_STATS_USER(sock_net(sk), | |
501 | UDP_MIB_CSUMERRORS, is_udplite); | |
0856f939 WY |
502 | UDP6_INC_STATS_USER(sock_net(sk), |
503 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 | 504 | } |
0856f939 | 505 | } |
8a74ad60 | 506 | unlock_sock_fast(sk, slow); |
1da177e4 | 507 | |
32c90254 | 508 | if (noblock) |
1da177e4 | 509 | return -EAGAIN; |
9cfaa8de XZ |
510 | |
511 | /* starting over for a new packet */ | |
512 | msg->msg_flags &= ~MSG_TRUNC; | |
1da177e4 LT |
513 | goto try_again; |
514 | } | |
515 | ||
ba4e58ec | 516 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 517 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 518 | struct udp_table *udptable) |
1da177e4 LT |
519 | { |
520 | struct ipv6_pinfo *np; | |
b71d1d42 ED |
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; | |
1da177e4 LT |
524 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); |
525 | struct sock *sk; | |
526 | int err; | |
527 | ||
c346dca1 | 528 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 529 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
530 | if (sk == NULL) |
531 | return; | |
532 | ||
81aded24 DM |
533 | if (type == ICMPV6_PKT_TOOBIG) |
534 | ip6_sk_update_pmtu(skb, sk, info); | |
1a462d18 | 535 | if (type == NDISC_REDIRECT) { |
ec18d9a2 | 536 | ip6_sk_redirect(skb, sk); |
1a462d18 DJ |
537 | goto out; |
538 | } | |
81aded24 | 539 | |
1da177e4 LT |
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 | ||
b1faf566 | 548 | if (np->recverr) |
1da177e4 | 549 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
b1faf566 | 550 | |
1da177e4 LT |
551 | sk->sk_err = err; |
552 | sk->sk_error_report(sk); | |
553 | out: | |
554 | sock_put(sk); | |
555 | } | |
556 | ||
f7ad74fe BL |
557 | static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
558 | { | |
559 | int rc; | |
560 | ||
efe4208f | 561 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
f7ad74fe | 562 | sock_rps_save_rxhash(sk, skb); |
005ec974 SB |
563 | sk_mark_napi_id(sk, skb); |
564 | } | |
f7ad74fe BL |
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 | ||
ba4e58ec | 581 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
582 | struct inet6_skb_parm *opt, u8 type, |
583 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 584 | { |
645ca708 | 585 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
586 | } |
587 | ||
d7f3f621 BL |
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 | ||
f7ad74fe | 596 | int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 597 | { |
ba4e58ec | 598 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 599 | int rc; |
b2bf1e26 | 600 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 601 | |
ba4e58ec GR |
602 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
603 | goto drop; | |
1da177e4 | 604 | |
d7f3f621 BL |
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 | ||
ba4e58ec GR |
636 | /* |
637 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
638 | */ | |
b2bf1e26 | 639 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
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 | } | |
1da177e4 LT |
653 | } |
654 | ||
33d480ce | 655 | if (rcu_access_pointer(sk->sk_filter)) { |
1ab6eb62 | 656 | if (udp_lib_checksum_complete(skb)) |
6a5dc9e5 | 657 | goto csum_error; |
1ab6eb62 | 658 | } |
ba4e58ec | 659 | |
cb80ef46 BL |
660 | if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) |
661 | goto drop; | |
662 | ||
d826eb14 | 663 | skb_dst_drop(skb); |
cb75994e | 664 | |
cb80ef46 BL |
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); | |
f7ad74fe BL |
674 | |
675 | return rc; | |
6a5dc9e5 ED |
676 | csum_error: |
677 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); | |
ba4e58ec | 678 | drop: |
ef28d1a2 | 679 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
cb80ef46 | 680 | atomic_inc(&sk->sk_drops); |
ba4e58ec GR |
681 | kfree_skb(skb); |
682 | return -1; | |
1da177e4 LT |
683 | } |
684 | ||
920a4611 | 685 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
b71d1d42 ED |
686 | __be16 loc_port, const struct in6_addr *loc_addr, |
687 | __be16 rmt_port, const struct in6_addr *rmt_addr, | |
1da177e4 LT |
688 | int dif) |
689 | { | |
88ab1932 | 690 | struct hlist_nulls_node *node; |
1da177e4 LT |
691 | struct sock *s = sk; |
692 | unsigned short num = ntohs(loc_port); | |
693 | ||
88ab1932 | 694 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
695 | struct inet_sock *inet = inet_sk(s); |
696 | ||
920a4611 | 697 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
698 | continue; |
699 | ||
d4cada4a ED |
700 | if (udp_sk(s)->udp_port_hash == num && |
701 | s->sk_family == PF_INET6) { | |
c720c7e8 ED |
702 | if (inet->inet_dport) { |
703 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
704 | continue; |
705 | } | |
efe4208f ED |
706 | if (!ipv6_addr_any(&sk->sk_v6_daddr) && |
707 | !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) | |
1da177e4 LT |
708 | continue; |
709 | ||
710 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
711 | continue; | |
712 | ||
efe4208f ED |
713 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
714 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)) | |
40796c5e | 715 | continue; |
1da177e4 | 716 | } |
add459aa | 717 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
718 | continue; |
719 | return s; | |
720 | } | |
721 | } | |
722 | return NULL; | |
723 | } | |
724 | ||
a1ab77f9 ED |
725 | static void flush_stack(struct sock **stack, unsigned int count, |
726 | struct sk_buff *skb, unsigned int final) | |
727 | { | |
cb80ef46 | 728 | struct sk_buff *skb1 = NULL; |
a1ab77f9 | 729 | struct sock *sk; |
cb80ef46 | 730 | unsigned int i; |
a1ab77f9 ED |
731 | |
732 | for (i = 0; i < count; i++) { | |
f6b8f32c | 733 | sk = stack[i]; |
cb80ef46 BL |
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)); | |
a1ab77f9 | 742 | } |
cb80ef46 BL |
743 | |
744 | if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) | |
745 | skb1 = NULL; | |
a1ab77f9 | 746 | } |
cb80ef46 BL |
747 | if (unlikely(skb1)) |
748 | kfree_skb(skb1); | |
a1ab77f9 | 749 | } |
1da177e4 LT |
750 | /* |
751 | * Note: called only from the BH handler context, | |
752 | * so we don't need to lock the hashes. | |
753 | */ | |
e3163493 | 754 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
b71d1d42 | 755 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
645ca708 | 756 | struct udp_table *udptable) |
1da177e4 | 757 | { |
a1ab77f9 | 758 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 759 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 760 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 761 | int dif; |
a1ab77f9 | 762 | unsigned int i, count = 0; |
1da177e4 | 763 | |
645ca708 | 764 | spin_lock(&hslot->lock); |
88ab1932 | 765 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 766 | dif = inet6_iif(skb); |
920a4611 | 767 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
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; | |
95766fff | 777 | } |
1da177e4 | 778 | } |
a1ab77f9 ED |
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 | ||
645ca708 | 785 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
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 | } | |
ba4e58ec | 795 | return 0; |
1da177e4 LT |
796 | } |
797 | ||
645ca708 | 798 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 799 | int proto) |
1da177e4 | 800 | { |
3ffe533c | 801 | struct net *net = dev_net(skb->dev); |
1da177e4 | 802 | struct sock *sk; |
1ab1457c | 803 | struct udphdr *uh; |
b71d1d42 | 804 | const struct in6_addr *saddr, *daddr; |
1da177e4 LT |
805 | u32 ulen = 0; |
806 | ||
807 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 808 | goto discard; |
1da177e4 | 809 | |
0660e03f ACM |
810 | saddr = &ipv6_hdr(skb)->saddr; |
811 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 812 | uh = udp_hdr(skb); |
1da177e4 LT |
813 | |
814 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
815 | if (ulen > skb->len) |
816 | goto short_packet; | |
1da177e4 | 817 | |
759e5d00 HX |
818 | if (proto == IPPROTO_UDP) { |
819 | /* UDP validates ulen. */ | |
1da177e4 | 820 | |
ba4e58ec GR |
821 | /* Check for jumbo payload */ |
822 | if (ulen == 0) | |
823 | ulen = skb->len; | |
1da177e4 | 824 | |
ba4e58ec GR |
825 | if (ulen < sizeof(*uh)) |
826 | goto short_packet; | |
1da177e4 | 827 | |
ba4e58ec GR |
828 | if (ulen < skb->len) { |
829 | if (pskb_trim_rcsum(skb, ulen)) | |
830 | goto short_packet; | |
0660e03f ACM |
831 | saddr = &ipv6_hdr(skb)->saddr; |
832 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 833 | uh = udp_hdr(skb); |
ba4e58ec | 834 | } |
ba4e58ec | 835 | } |
1da177e4 | 836 | |
759e5d00 | 837 | if (udp6_csum_init(skb, uh, proto)) |
6a5dc9e5 | 838 | goto csum_error; |
759e5d00 | 839 | |
1ab1457c YH |
840 | /* |
841 | * Multicast receive code | |
1da177e4 | 842 | */ |
ba4e58ec | 843 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
844 | return __udp6_lib_mcast_deliver(net, skb, |
845 | saddr, daddr, udptable); | |
1da177e4 LT |
846 | |
847 | /* Unicast */ | |
848 | ||
1ab1457c | 849 | /* |
1da177e4 LT |
850 | * check socket cache ... must talk to Alan about his plans |
851 | * for sock caches... i'll skip this for now. | |
852 | */ | |
607c4aaf | 853 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
cb80ef46 | 854 | if (sk != NULL) { |
a5b50476 ET |
855 | int ret; |
856 | ||
a5b50476 | 857 | ret = udpv6_queue_rcv_skb(sk, skb); |
cb80ef46 | 858 | sock_put(sk); |
1da177e4 | 859 | |
cb80ef46 BL |
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; | |
1da177e4 | 865 | |
add459aa | 866 | return 0; |
1da177e4 | 867 | } |
1ab1457c | 868 | |
cb80ef46 | 869 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
c377411f | 870 | goto discard; |
cb80ef46 BL |
871 | |
872 | if (udp_lib_checksum_complete(skb)) | |
6a5dc9e5 | 873 | goto csum_error; |
cb80ef46 BL |
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); | |
add459aa | 879 | return 0; |
1da177e4 | 880 | |
1ab1457c | 881 | short_packet: |
d6bc0149 | 882 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 883 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
884 | saddr, |
885 | ntohs(uh->source), | |
886 | ulen, | |
887 | skb->len, | |
888 | daddr, | |
889 | ntohs(uh->dest)); | |
6a5dc9e5 ED |
890 | goto discard; |
891 | csum_error: | |
892 | UDP6_INC_STATS_BH(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); | |
1da177e4 | 893 | discard: |
ef28d1a2 | 894 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 895 | kfree_skb(skb); |
add459aa | 896 | return 0; |
1da177e4 | 897 | } |
ba4e58ec | 898 | |
e5bbef20 | 899 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 900 | { |
645ca708 | 901 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
902 | } |
903 | ||
1da177e4 LT |
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 | ||
36d926b9 DL |
911 | if (up->pending == AF_INET) |
912 | udp_flush_pending_frames(sk); | |
913 | else if (up->pending) { | |
1da177e4 LT |
914 | up->len = 0; |
915 | up->pending = 0; | |
916 | ip6_flush_pending_frames(sk); | |
1ab1457c | 917 | } |
1da177e4 LT |
918 | } |
919 | ||
493c6be3 SS |
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 | ||
1da177e4 LT |
961 | /* |
962 | * Sending | |
963 | */ | |
964 | ||
4c0a6cb0 | 965 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
966 | { |
967 | struct sk_buff *skb; | |
968 | struct udphdr *uh; | |
4c0a6cb0 | 969 | struct udp_sock *up = udp_sk(sk); |
1da177e4 | 970 | struct inet_sock *inet = inet_sk(sk); |
8822b64a | 971 | struct flowi6 *fl6; |
1da177e4 | 972 | int err = 0; |
b2bf1e26 | 973 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 974 | __wsum csum = 0; |
1da177e4 | 975 | |
8822b64a HFS |
976 | if (up->pending == AF_INET) |
977 | return udp_push_pending_frames(sk); | |
978 | ||
979 | fl6 = &inet->cork.fl.u.ip6; | |
980 | ||
1da177e4 LT |
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 | */ | |
4bedb452 | 988 | uh = udp_hdr(skb); |
1958b856 DM |
989 | uh->source = fl6->fl6_sport; |
990 | uh->dest = fl6->fl6_dport; | |
1da177e4 LT |
991 | uh->len = htons(up->len); |
992 | uh->check = 0; | |
993 | ||
b2bf1e26 | 994 | if (is_udplite) |
ba4e58ec | 995 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 | 996 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
4c9483b2 | 997 | udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, |
493c6be3 SS |
998 | up->len); |
999 | goto send; | |
1000 | } else | |
ba4e58ec | 1001 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 1002 | |
ba4e58ec | 1003 | /* add protocol-dependent pseudo-header */ |
4c9483b2 DM |
1004 | uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
1005 | up->len, fl6->flowi6_proto, csum); | |
1da177e4 | 1006 | if (uh->check == 0) |
f6ab0288 | 1007 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 1008 | |
493c6be3 | 1009 | send: |
1da177e4 | 1010 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
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); | |
1da177e4 LT |
1020 | out: |
1021 | up->len = 0; | |
1022 | up->pending = 0; | |
1023 | return err; | |
1024 | } | |
1025 | ||
ba4e58ec | 1026 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
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; | |
20c59de2 | 1034 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
1035 | struct ipv6_txoptions *opt = NULL; |
1036 | struct ip6_flowlabel *flowlabel = NULL; | |
4c9483b2 | 1037 | struct flowi6 fl6; |
1da177e4 LT |
1038 | struct dst_entry *dst; |
1039 | int addr_len = msg->msg_namelen; | |
1040 | int ulen = len; | |
1041 | int hlimit = -1; | |
41a1f8ea | 1042 | int tclass = -1; |
13b52cd4 | 1043 | int dontfrag = -1; |
1da177e4 LT |
1044 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
1045 | int err; | |
987905de | 1046 | int connected = 0; |
b2bf1e26 | 1047 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 1048 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
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; | |
efe4208f | 1074 | daddr = &sk->sk_v6_daddr; |
1ab1457c | 1075 | } else |
1da177e4 LT |
1076 | daddr = NULL; |
1077 | ||
1078 | if (daddr) { | |
e773e4fa | 1079 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
1080 | struct sockaddr_in sin; |
1081 | sin.sin_family = AF_INET; | |
c720c7e8 | 1082 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
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, | |
b59e139b | 1097 | better check is made in ip6_append_data(). |
1da177e4 LT |
1098 | */ |
1099 | if (len > INT_MAX - sizeof(struct udphdr)) | |
1100 | return -EMSGSIZE; | |
1ab1457c | 1101 | |
1da177e4 LT |
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 | ||
4c9483b2 | 1120 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 LT |
1121 | |
1122 | if (sin6) { | |
1123 | if (sin6->sin6_port == 0) | |
1124 | return -EINVAL; | |
1125 | ||
1958b856 | 1126 | fl6.fl6_dport = sin6->sin6_port; |
1da177e4 LT |
1127 | daddr = &sin6->sin6_addr; |
1128 | ||
1129 | if (np->sndflow) { | |
4c9483b2 DM |
1130 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1131 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
1132 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
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 && | |
efe4208f ED |
1144 | ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) |
1145 | daddr = &sk->sk_v6_daddr; | |
1da177e4 LT |
1146 | |
1147 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1148 | sin6->sin6_scope_id && | |
842df073 | 1149 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
4c9483b2 | 1150 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 LT |
1151 | } else { |
1152 | if (sk->sk_state != TCP_ESTABLISHED) | |
1153 | return -EDESTADDRREQ; | |
1154 | ||
1958b856 | 1155 | fl6.fl6_dport = inet->inet_dport; |
efe4208f | 1156 | daddr = &sk->sk_v6_daddr; |
4c9483b2 | 1157 | fl6.flowlabel = np->flow_label; |
987905de | 1158 | connected = 1; |
1da177e4 LT |
1159 | } |
1160 | ||
4c9483b2 DM |
1161 | if (!fl6.flowi6_oif) |
1162 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 | 1163 | |
4c9483b2 DM |
1164 | if (!fl6.flowi6_oif) |
1165 | fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; | |
9f690db7 | 1166 | |
4c9483b2 | 1167 | fl6.flowi6_mark = sk->sk_mark; |
51953d5b | 1168 | |
1da177e4 LT |
1169 | if (msg->msg_controllen) { |
1170 | opt = &opt_space; | |
1171 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1172 | opt->tot_len = sizeof(*opt); | |
1173 | ||
73df66f8 TP |
1174 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
1175 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
1176 | if (err < 0) { |
1177 | fl6_sock_release(flowlabel); | |
1178 | return err; | |
1179 | } | |
4c9483b2 DM |
1180 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1181 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1182 | if (flowlabel == NULL) |
1183 | return -EINVAL; | |
1184 | } | |
1185 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1186 | opt = NULL; | |
987905de | 1187 | connected = 0; |
1da177e4 LT |
1188 | } |
1189 | if (opt == NULL) | |
1190 | opt = np->opt; | |
df9890c3 YH |
1191 | if (flowlabel) |
1192 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1193 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1194 | |
4c9483b2 | 1195 | fl6.flowi6_proto = sk->sk_protocol; |
876c7f41 | 1196 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 1197 | fl6.daddr = *daddr; |
876c7f41 | 1198 | else |
4c9483b2 DM |
1199 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
1200 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 1201 | fl6.saddr = np->saddr; |
1958b856 | 1202 | fl6.fl6_sport = inet->inet_sport; |
1ab1457c | 1203 | |
4c9483b2 | 1204 | final_p = fl6_update_dst(&fl6, opt, &final); |
20c59de2 | 1205 | if (final_p) |
987905de | 1206 | connected = 0; |
1da177e4 | 1207 | |
4c9483b2 DM |
1208 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { |
1209 | fl6.flowi6_oif = np->mcast_oif; | |
987905de | 1210 | connected = 0; |
c4062dfc EH |
1211 | } else if (!fl6.flowi6_oif) |
1212 | fl6.flowi6_oif = np->ucast_oif; | |
1da177e4 | 1213 | |
4c9483b2 | 1214 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
beb8d13b | 1215 | |
4c9483b2 | 1216 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); |
68d0c6d3 DM |
1217 | if (IS_ERR(dst)) { |
1218 | err = PTR_ERR(dst); | |
1219 | dst = NULL; | |
1da177e4 | 1220 | goto out; |
14e50e57 | 1221 | } |
1da177e4 LT |
1222 | |
1223 | if (hlimit < 0) { | |
4c9483b2 | 1224 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
1da177e4 LT |
1225 | hlimit = np->mcast_hops; |
1226 | else | |
1227 | hlimit = np->hop_limit; | |
1228 | if (hlimit < 0) | |
6b75d090 | 1229 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1230 | } |
1231 | ||
e651f03a | 1232 | if (tclass < 0) |
41a1f8ea | 1233 | tclass = np->tclass; |
41a1f8ea | 1234 | |
13b52cd4 BH |
1235 | if (dontfrag < 0) |
1236 | dontfrag = np->dontfrag; | |
1237 | ||
1da177e4 LT |
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 | ||
64ce2073 | 1248 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1249 | err = -EINVAL; |
1250 | goto out; | |
1251 | } | |
1252 | ||
1253 | up->pending = AF_INET6; | |
1254 | ||
1255 | do_append_data: | |
1256 | up->len += ulen; | |
ba4e58ec GR |
1257 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1258 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
4c9483b2 | 1259 | sizeof(struct udphdr), hlimit, tclass, opt, &fl6, |
41a1f8ea | 1260 | (struct rt6_info*)dst, |
13b52cd4 | 1261 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1262 | if (err) |
1263 | udp_v6_flush_pending_frames(sk); | |
1264 | else if (!corkreq) | |
4c0a6cb0 | 1265 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1266 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1267 | up->pending = 0; | |
1da177e4 | 1268 | |
a5e7c210 DM |
1269 | if (dst) { |
1270 | if (connected) { | |
1271 | ip6_dst_store(sk, dst, | |
efe4208f ED |
1272 | ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? |
1273 | &sk->sk_v6_daddr : NULL, | |
8e1ef0a9 | 1274 | #ifdef CONFIG_IPV6_SUBTREES |
4c9483b2 | 1275 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
8e1ef0a9 YH |
1276 | &np->saddr : |
1277 | #endif | |
1278 | NULL); | |
a5e7c210 DM |
1279 | } else { |
1280 | dst_release(dst); | |
1281 | } | |
a3c96089 | 1282 | dst = NULL; |
a5e7c210 DM |
1283 | } |
1284 | ||
1da177e4 LT |
1285 | if (err > 0) |
1286 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1287 | release_sock(sk); | |
1288 | out: | |
a3c96089 | 1289 | dst_release(dst); |
1da177e4 | 1290 | fl6_sock_release(flowlabel); |
cd562c98 | 1291 | if (!err) |
1da177e4 | 1292 | return len; |
a18135eb DM |
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)) { | |
235b9f7a PE |
1301 | UDP6_INC_STATS_USER(sock_net(sk), |
1302 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1303 | } |
1da177e4 LT |
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 | ||
7d06b2e0 | 1314 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 | 1315 | { |
44046a59 | 1316 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
1317 | lock_sock(sk); |
1318 | udp_v6_flush_pending_frames(sk); | |
1319 | release_sock(sk); | |
1320 | ||
44046a59 TP |
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 | ||
1da177e4 | 1328 | inet6_destroy_sock(sk); |
1da177e4 LT |
1329 | } |
1330 | ||
1331 | /* | |
1332 | * Socket option code for UDP | |
1333 | */ | |
ba4e58ec | 1334 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1335 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1336 | { |
db8dac20 | 1337 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1338 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1339 | udp_v6_push_pending_frames); | |
ba4e58ec | 1340 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1341 | } |
1342 | ||
1343 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1344 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1345 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1346 | { |
db8dac20 | 1347 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1348 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1349 | udp_v6_push_pending_frames); | |
ba4e58ec | 1350 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1351 | } |
1352 | #endif | |
1353 | ||
ba4e58ec GR |
1354 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1355 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1356 | { |
db8dac20 | 1357 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1358 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1359 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1360 | } |
1361 | ||
1362 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1363 | int compat_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 compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1369 | } |
1370 | #endif | |
1371 | ||
41135cc8 | 1372 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
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 | |
ba4e58ec | 1380 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 | 1381 | { |
17ef66af LC |
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 | } | |
1da177e4 LT |
1391 | return 0; |
1392 | } | |
1393 | ||
73cb88ec AV |
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 | ||
1da177e4 | 1402 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1403 | .name = "udp6", |
1404 | .family = AF_INET6, | |
645ca708 | 1405 | .udp_table = &udp_table, |
73cb88ec | 1406 | .seq_fops = &udp6_afinfo_seq_fops, |
dda61925 DL |
1407 | .seq_ops = { |
1408 | .show = udp6_seq_show, | |
1409 | }, | |
1da177e4 LT |
1410 | }; |
1411 | ||
2c8c1e72 | 1412 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1413 | { |
0c96d8c5 | 1414 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1415 | } |
1416 | ||
0c96d8c5 DL |
1417 | void udp6_proc_exit(struct net *net) { |
1418 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1419 | } |
1420 | #endif /* CONFIG_PROC_FS */ | |
1421 | ||
f77d6021 ED |
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 | ||
1da177e4 LT |
1433 | /* ------------------------------------------------------------------------ */ |
1434 | ||
1435 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1436 | .name = "UDPv6", |
1437 | .owner = THIS_MODULE, | |
ba4e58ec | 1438 | .close = udp_lib_close, |
543d9cfe ACM |
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, | |
f7ad74fe | 1447 | .backlog_rcv = __udpv6_queue_rcv_skb, |
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), |
271b72c7 | 1457 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1458 | .h.udp_table = &udp_table, |
3fdadf7d | 1459 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1460 | .compat_setsockopt = compat_udpv6_setsockopt, |
1461 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1462 | #endif |
f77d6021 | 1463 | .clear_sk = udp_v6_clear_sk, |
1da177e4 LT |
1464 | }; |
1465 | ||
1da177e4 LT |
1466 | static struct inet_protosw udpv6_protosw = { |
1467 | .type = SOCK_DGRAM, | |
1468 | .protocol = IPPROTO_UDP, | |
1469 | .prot = &udpv6_prot, | |
1470 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1471 | .no_check = UDP_CSUM_DEFAULT, |
1472 | .flags = INET_PROTOSW_PERMANENT, | |
1473 | }; | |
1474 | ||
1475 | ||
7f4e4868 | 1476 | int __init udpv6_init(void) |
1da177e4 | 1477 | { |
7f4e4868 DL |
1478 | int ret; |
1479 | ||
3336288a VY |
1480 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); |
1481 | if (ret) | |
c6b641a4 | 1482 | goto out; |
3336288a | 1483 | |
7f4e4868 DL |
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 | ||
09f7709f | 1495 | void udpv6_exit(void) |
7f4e4868 DL |
1496 | { |
1497 | inet6_unregister_protosw(&udpv6_protosw); | |
1498 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1499 | } |