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> |
1da177e4 LT |
49 | |
50 | #include <linux/proc_fs.h> | |
51 | #include <linux/seq_file.h> | |
22911fc5 | 52 | #include <trace/events/skb.h> |
ba4e58ec | 53 | #include "udp_impl.h" |
1da177e4 | 54 | |
b2f5e7cd VY |
55 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
56 | { | |
57 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
58 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); | |
68835aba ED |
59 | __be32 sk1_rcv_saddr = sk_rcv_saddr(sk); |
60 | __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2); | |
b2f5e7cd VY |
61 | int sk_ipv6only = ipv6_only_sock(sk); |
62 | int sk2_ipv6only = inet_v6_ipv6only(sk2); | |
63 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); | |
64 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
65 | ||
66 | /* if both are mapped, treat as IPv4 */ | |
67 | if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) | |
499923c7 | 68 | return (!sk2_ipv6only && |
c720c7e8 ED |
69 | (!sk1_rcv_saddr || !sk2_rcv_saddr || |
70 | sk1_rcv_saddr == sk2_rcv_saddr)); | |
b2f5e7cd VY |
71 | |
72 | if (addr_type2 == IPV6_ADDR_ANY && | |
73 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
74 | return 1; | |
75 | ||
76 | if (addr_type == IPV6_ADDR_ANY && | |
77 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
78 | return 1; | |
79 | ||
80 | if (sk2_rcv_saddr6 && | |
81 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
82 | return 1; | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
d4cada4a ED |
87 | static unsigned int udp6_portaddr_hash(struct net *net, |
88 | const struct in6_addr *addr6, | |
89 | unsigned int port) | |
90 | { | |
91 | unsigned int hash, mix = net_hash_mix(net); | |
92 | ||
93 | if (ipv6_addr_any(addr6)) | |
94 | hash = jhash_1word(0, mix); | |
856540ee | 95 | else if (ipv6_addr_v4mapped(addr6)) |
0eae88f3 | 96 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
d4cada4a | 97 | else |
0eae88f3 | 98 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
d4cada4a ED |
99 | |
100 | return hash ^ port; | |
101 | } | |
102 | ||
103 | ||
6ba5a3c5 | 104 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 105 | { |
30fff923 ED |
106 | unsigned int hash2_nulladdr = |
107 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); | |
9a52e97e | 108 | unsigned int hash2_partial = |
30fff923 ED |
109 | udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); |
110 | ||
d4cada4a | 111 | /* precompute partial secondary hash */ |
30fff923 ED |
112 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
113 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); | |
1da177e4 LT |
114 | } |
115 | ||
719f8358 ED |
116 | static void udp_v6_rehash(struct sock *sk) |
117 | { | |
118 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), | |
119 | &inet6_sk(sk)->rcv_saddr, | |
120 | inet_sk(sk)->inet_num); | |
121 | ||
122 | udp_lib_rehash(sk, new_hash); | |
123 | } | |
124 | ||
645ca708 ED |
125 | static inline int compute_score(struct sock *sk, struct net *net, |
126 | unsigned short hnum, | |
88440ae7 BS |
127 | const struct in6_addr *saddr, __be16 sport, |
128 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 ED |
129 | int dif) |
130 | { | |
131 | int score = -1; | |
132 | ||
d4cada4a | 133 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
645ca708 ED |
134 | sk->sk_family == PF_INET6) { |
135 | struct ipv6_pinfo *np = inet6_sk(sk); | |
136 | struct inet_sock *inet = inet_sk(sk); | |
137 | ||
138 | score = 0; | |
c720c7e8 ED |
139 | if (inet->inet_dport) { |
140 | if (inet->inet_dport != sport) | |
645ca708 ED |
141 | return -1; |
142 | score++; | |
143 | } | |
144 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
145 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
146 | return -1; | |
147 | score++; | |
148 | } | |
149 | if (!ipv6_addr_any(&np->daddr)) { | |
150 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
151 | return -1; | |
152 | score++; | |
153 | } | |
154 | if (sk->sk_bound_dev_if) { | |
155 | if (sk->sk_bound_dev_if != dif) | |
156 | return -1; | |
157 | score++; | |
158 | } | |
159 | } | |
160 | return score; | |
161 | } | |
162 | ||
fddc17de ED |
163 | #define SCORE2_MAX (1 + 1 + 1) |
164 | static inline int compute_score2(struct sock *sk, struct net *net, | |
165 | const struct in6_addr *saddr, __be16 sport, | |
166 | const struct in6_addr *daddr, unsigned short hnum, | |
167 | int dif) | |
168 | { | |
169 | int score = -1; | |
170 | ||
171 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && | |
172 | sk->sk_family == PF_INET6) { | |
173 | struct ipv6_pinfo *np = inet6_sk(sk); | |
174 | struct inet_sock *inet = inet_sk(sk); | |
175 | ||
176 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
177 | return -1; | |
178 | score = 0; | |
179 | if (inet->inet_dport) { | |
180 | if (inet->inet_dport != sport) | |
181 | return -1; | |
182 | score++; | |
183 | } | |
184 | if (!ipv6_addr_any(&np->daddr)) { | |
185 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
186 | return -1; | |
187 | score++; | |
188 | } | |
189 | if (sk->sk_bound_dev_if) { | |
190 | if (sk->sk_bound_dev_if != dif) | |
191 | return -1; | |
192 | score++; | |
193 | } | |
194 | } | |
195 | return score; | |
196 | } | |
197 | ||
fddc17de ED |
198 | |
199 | /* called with read_rcu_lock() */ | |
200 | static struct sock *udp6_lib_lookup2(struct net *net, | |
201 | const struct in6_addr *saddr, __be16 sport, | |
202 | const struct in6_addr *daddr, unsigned int hnum, int dif, | |
203 | struct udp_hslot *hslot2, unsigned int slot2) | |
204 | { | |
205 | struct sock *sk, *result; | |
206 | struct hlist_nulls_node *node; | |
72289b96 TH |
207 | int score, badness, matches = 0, reuseport = 0; |
208 | u32 hash = 0; | |
fddc17de ED |
209 | |
210 | begin: | |
211 | result = NULL; | |
212 | badness = -1; | |
213 | udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { | |
214 | score = compute_score2(sk, net, saddr, sport, | |
215 | daddr, hnum, dif); | |
216 | if (score > badness) { | |
217 | result = sk; | |
218 | badness = score; | |
72289b96 TH |
219 | reuseport = sk->sk_reuseport; |
220 | if (reuseport) { | |
221 | hash = inet6_ehashfn(net, daddr, hnum, | |
222 | saddr, sport); | |
223 | matches = 1; | |
224 | } else if (score == SCORE2_MAX) | |
fddc17de | 225 | goto exact_match; |
72289b96 TH |
226 | } else if (score == badness && reuseport) { |
227 | matches++; | |
228 | if (((u64)hash * matches) >> 32 == 0) | |
229 | result = sk; | |
230 | hash = next_pseudo_random32(hash); | |
fddc17de ED |
231 | } |
232 | } | |
233 | /* | |
234 | * if the nulls value we got at the end of this lookup is | |
235 | * not the expected one, we must restart lookup. | |
236 | * We probably met an item that was moved to another chain. | |
237 | */ | |
238 | if (get_nulls_value(node) != slot2) | |
239 | goto begin; | |
240 | ||
241 | if (result) { | |
242 | exact_match: | |
c31504dc | 243 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
fddc17de ED |
244 | result = NULL; |
245 | else if (unlikely(compute_score2(result, net, saddr, sport, | |
246 | daddr, hnum, dif) < badness)) { | |
247 | sock_put(result); | |
248 | goto begin; | |
249 | } | |
250 | } | |
251 | return result; | |
252 | } | |
253 | ||
fce82338 | 254 | struct sock *__udp6_lib_lookup(struct net *net, |
88440ae7 BS |
255 | const struct in6_addr *saddr, __be16 sport, |
256 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 | 257 | int dif, struct udp_table *udptable) |
1da177e4 | 258 | { |
271b72c7 | 259 | struct sock *sk, *result; |
88ab1932 | 260 | struct hlist_nulls_node *node; |
1da177e4 | 261 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
262 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
263 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
72289b96 TH |
264 | int score, badness, matches = 0, reuseport = 0; |
265 | u32 hash = 0; | |
645ca708 | 266 | |
271b72c7 | 267 | rcu_read_lock(); |
fddc17de ED |
268 | if (hslot->count > 10) { |
269 | hash2 = udp6_portaddr_hash(net, daddr, hnum); | |
270 | slot2 = hash2 & udptable->mask; | |
271 | hslot2 = &udptable->hash2[slot2]; | |
272 | if (hslot->count < hslot2->count) | |
273 | goto begin; | |
274 | ||
275 | result = udp6_lib_lookup2(net, saddr, sport, | |
276 | daddr, hnum, dif, | |
277 | hslot2, slot2); | |
278 | if (!result) { | |
279 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); | |
280 | slot2 = hash2 & udptable->mask; | |
281 | hslot2 = &udptable->hash2[slot2]; | |
282 | if (hslot->count < hslot2->count) | |
283 | goto begin; | |
284 | ||
1223c67c JBD |
285 | result = udp6_lib_lookup2(net, saddr, sport, |
286 | &in6addr_any, hnum, dif, | |
fddc17de ED |
287 | hslot2, slot2); |
288 | } | |
289 | rcu_read_unlock(); | |
290 | return result; | |
291 | } | |
271b72c7 ED |
292 | begin: |
293 | result = NULL; | |
294 | badness = -1; | |
88ab1932 | 295 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
296 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
297 | if (score > badness) { | |
298 | result = sk; | |
299 | badness = score; | |
72289b96 TH |
300 | reuseport = sk->sk_reuseport; |
301 | if (reuseport) { | |
302 | hash = inet6_ehashfn(net, daddr, hnum, | |
303 | saddr, sport); | |
304 | matches = 1; | |
305 | } | |
306 | } else if (score == badness && reuseport) { | |
307 | matches++; | |
308 | if (((u64)hash * matches) >> 32 == 0) | |
309 | result = sk; | |
310 | hash = next_pseudo_random32(hash); | |
1da177e4 LT |
311 | } |
312 | } | |
88ab1932 ED |
313 | /* |
314 | * if the nulls value we got at the end of this lookup is | |
315 | * not the expected one, we must restart lookup. | |
316 | * We probably met an item that was moved to another chain. | |
317 | */ | |
fddc17de | 318 | if (get_nulls_value(node) != slot) |
88ab1932 ED |
319 | goto begin; |
320 | ||
271b72c7 | 321 | if (result) { |
c31504dc | 322 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
271b72c7 ED |
323 | result = NULL; |
324 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
325 | daddr, dport, dif) < badness)) { | |
326 | sock_put(result); | |
327 | goto begin; | |
328 | } | |
329 | } | |
330 | rcu_read_unlock(); | |
1da177e4 LT |
331 | return result; |
332 | } | |
fce82338 | 333 | EXPORT_SYMBOL_GPL(__udp6_lib_lookup); |
1da177e4 | 334 | |
607c4aaf KK |
335 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
336 | __be16 sport, __be16 dport, | |
645ca708 | 337 | struct udp_table *udptable) |
607c4aaf | 338 | { |
23542618 | 339 | struct sock *sk; |
b71d1d42 | 340 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
607c4aaf | 341 | |
23542618 KK |
342 | if (unlikely(sk = skb_steal_sock(skb))) |
343 | return sk; | |
adf30907 ED |
344 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
345 | &iph->daddr, dport, inet6_iif(skb), | |
346 | udptable); | |
607c4aaf KK |
347 | } |
348 | ||
aa976fc0 BS |
349 | struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, |
350 | const struct in6_addr *daddr, __be16 dport, int dif) | |
351 | { | |
352 | return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); | |
353 | } | |
354 | EXPORT_SYMBOL_GPL(udp6_lib_lookup); | |
355 | ||
356 | ||
1da177e4 LT |
357 | /* |
358 | * This should be easy, if there is something there we | |
359 | * return it, otherwise we block. | |
360 | */ | |
361 | ||
ba4e58ec | 362 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
363 | struct msghdr *msg, size_t len, |
364 | int noblock, int flags, int *addr_len) | |
365 | { | |
366 | struct ipv6_pinfo *np = inet6_sk(sk); | |
367 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 368 | struct sk_buff *skb; |
59c2cdae | 369 | unsigned int ulen, copied; |
3f518bf7 | 370 | int peeked, off = 0; |
759e5d00 HX |
371 | int err; |
372 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 373 | int is_udp4; |
8a74ad60 | 374 | bool slow; |
1da177e4 | 375 | |
1ab1457c | 376 | if (addr_len) |
3dde2598 | 377 | *addr_len = sizeof(struct sockaddr_in6); |
1ab1457c | 378 | |
1da177e4 LT |
379 | if (flags & MSG_ERRQUEUE) |
380 | return ipv6_recv_error(sk, msg, len); | |
381 | ||
4b340ae2 BH |
382 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
383 | return ipv6_recv_rxpmtu(sk, msg, len); | |
384 | ||
1da177e4 | 385 | try_again: |
a59322be | 386 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
3f518bf7 | 387 | &peeked, &off, &err); |
1da177e4 LT |
388 | if (!skb) |
389 | goto out; | |
390 | ||
759e5d00 | 391 | ulen = skb->len - sizeof(struct udphdr); |
59c2cdae DM |
392 | copied = len; |
393 | if (copied > ulen) | |
394 | copied = ulen; | |
395 | else if (copied < ulen) | |
1ab1457c | 396 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 397 | |
f26ba175 WY |
398 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
399 | ||
ba4e58ec | 400 | /* |
759e5d00 HX |
401 | * If checksum is needed at all, try to do it while copying the |
402 | * data. If the data is truncated, or if we only want a partial | |
403 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 404 | */ |
ba4e58ec | 405 | |
59c2cdae | 406 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
759e5d00 | 407 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 408 | goto csum_copy_err; |
ba4e58ec GR |
409 | } |
410 | ||
60476372 | 411 | if (skb_csum_unnecessary(skb)) |
ba4e58ec | 412 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
22911fc5 | 413 | msg->msg_iov, copied); |
ba4e58ec | 414 | else { |
1da177e4 LT |
415 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
416 | if (err == -EINVAL) | |
417 | goto csum_copy_err; | |
418 | } | |
22911fc5 ED |
419 | if (unlikely(err)) { |
420 | trace_kfree_skb(skb, udpv6_recvmsg); | |
979402b1 ED |
421 | if (!peeked) { |
422 | atomic_inc(&sk->sk_drops); | |
423 | if (is_udp4) | |
424 | UDP_INC_STATS_USER(sock_net(sk), | |
425 | UDP_MIB_INERRORS, | |
426 | is_udplite); | |
427 | else | |
428 | UDP6_INC_STATS_USER(sock_net(sk), | |
429 | UDP_MIB_INERRORS, | |
430 | is_udplite); | |
431 | } | |
1da177e4 | 432 | goto out_free; |
22911fc5 | 433 | } |
f26ba175 WY |
434 | if (!peeked) { |
435 | if (is_udp4) | |
436 | UDP_INC_STATS_USER(sock_net(sk), | |
437 | UDP_MIB_INDATAGRAMS, is_udplite); | |
438 | else | |
439 | UDP6_INC_STATS_USER(sock_net(sk), | |
440 | UDP_MIB_INDATAGRAMS, is_udplite); | |
441 | } | |
cb75994e | 442 | |
3b885787 | 443 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
444 | |
445 | /* Copy the address. */ | |
446 | if (msg->msg_name) { | |
447 | struct sockaddr_in6 *sin6; | |
1ab1457c | 448 | |
1da177e4 LT |
449 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
450 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 451 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
452 | sin6->sin6_flowinfo = 0; |
453 | sin6->sin6_scope_id = 0; | |
454 | ||
f26ba175 | 455 | if (is_udp4) |
b301e82c BH |
456 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
457 | &sin6->sin6_addr); | |
1da177e4 | 458 | else { |
4e3fd7a0 | 459 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 LT |
460 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
461 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
462 | } | |
463 | ||
464 | } | |
f26ba175 | 465 | if (is_udp4) { |
1da177e4 LT |
466 | if (inet->cmsg_flags) |
467 | ip_cmsg_recv(msg, skb); | |
468 | } else { | |
469 | if (np->rxopt.all) | |
73df66f8 | 470 | ip6_datagram_recv_ctl(sk, msg, skb); |
1ab1457c | 471 | } |
1da177e4 | 472 | |
59c2cdae | 473 | err = copied; |
1da177e4 | 474 | if (flags & MSG_TRUNC) |
759e5d00 | 475 | err = ulen; |
1da177e4 LT |
476 | |
477 | out_free: | |
9d410c79 | 478 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
479 | out: |
480 | return err; | |
481 | ||
482 | csum_copy_err: | |
8a74ad60 | 483 | slow = lock_sock_fast(sk); |
0856f939 WY |
484 | if (!skb_kill_datagram(sk, skb, flags)) { |
485 | if (is_udp4) | |
486 | UDP_INC_STATS_USER(sock_net(sk), | |
487 | UDP_MIB_INERRORS, is_udplite); | |
488 | else | |
489 | UDP6_INC_STATS_USER(sock_net(sk), | |
490 | UDP_MIB_INERRORS, is_udplite); | |
491 | } | |
8a74ad60 | 492 | unlock_sock_fast(sk, slow); |
1da177e4 | 493 | |
32c90254 | 494 | if (noblock) |
1da177e4 | 495 | return -EAGAIN; |
9cfaa8de XZ |
496 | |
497 | /* starting over for a new packet */ | |
498 | msg->msg_flags &= ~MSG_TRUNC; | |
1da177e4 LT |
499 | goto try_again; |
500 | } | |
501 | ||
ba4e58ec | 502 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 503 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 504 | struct udp_table *udptable) |
1da177e4 LT |
505 | { |
506 | struct ipv6_pinfo *np; | |
b71d1d42 ED |
507 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
508 | const struct in6_addr *saddr = &hdr->saddr; | |
509 | const struct in6_addr *daddr = &hdr->daddr; | |
1da177e4 LT |
510 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); |
511 | struct sock *sk; | |
512 | int err; | |
513 | ||
c346dca1 | 514 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 515 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
516 | if (sk == NULL) |
517 | return; | |
518 | ||
81aded24 DM |
519 | if (type == ICMPV6_PKT_TOOBIG) |
520 | ip6_sk_update_pmtu(skb, sk, info); | |
ec18d9a2 DM |
521 | if (type == NDISC_REDIRECT) |
522 | ip6_sk_redirect(skb, sk); | |
81aded24 | 523 | |
1da177e4 LT |
524 | np = inet6_sk(sk); |
525 | ||
526 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
527 | goto out; | |
528 | ||
529 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
530 | goto out; | |
531 | ||
b1faf566 | 532 | if (np->recverr) |
1da177e4 | 533 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
b1faf566 | 534 | |
1da177e4 LT |
535 | sk->sk_err = err; |
536 | sk->sk_error_report(sk); | |
537 | out: | |
538 | sock_put(sk); | |
539 | } | |
540 | ||
f7ad74fe BL |
541 | static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
542 | { | |
543 | int rc; | |
544 | ||
545 | if (!ipv6_addr_any(&inet6_sk(sk)->daddr)) | |
546 | sock_rps_save_rxhash(sk, skb); | |
547 | ||
548 | rc = sock_queue_rcv_skb(sk, skb); | |
549 | if (rc < 0) { | |
550 | int is_udplite = IS_UDPLITE(sk); | |
551 | ||
552 | /* Note that an ENOMEM error is charged twice */ | |
553 | if (rc == -ENOMEM) | |
554 | UDP6_INC_STATS_BH(sock_net(sk), | |
555 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
556 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); | |
557 | kfree_skb(skb); | |
558 | return -1; | |
559 | } | |
560 | return 0; | |
561 | } | |
562 | ||
ba4e58ec | 563 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
564 | struct inet6_skb_parm *opt, u8 type, |
565 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 566 | { |
645ca708 | 567 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
568 | } |
569 | ||
d7f3f621 BL |
570 | static struct static_key udpv6_encap_needed __read_mostly; |
571 | void udpv6_encap_enable(void) | |
572 | { | |
573 | if (!static_key_enabled(&udpv6_encap_needed)) | |
574 | static_key_slow_inc(&udpv6_encap_needed); | |
575 | } | |
576 | EXPORT_SYMBOL(udpv6_encap_enable); | |
577 | ||
f7ad74fe | 578 | int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 579 | { |
ba4e58ec | 580 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 581 | int rc; |
b2bf1e26 | 582 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 583 | |
ba4e58ec GR |
584 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
585 | goto drop; | |
1da177e4 | 586 | |
d7f3f621 BL |
587 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
588 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
589 | ||
590 | /* | |
591 | * This is an encapsulation socket so pass the skb to | |
592 | * the socket's udp_encap_rcv() hook. Otherwise, just | |
593 | * fall through and pass this up the UDP socket. | |
594 | * up->encap_rcv() returns the following value: | |
595 | * =0 if skb was successfully passed to the encap | |
596 | * handler or was discarded by it. | |
597 | * >0 if skb should be passed on to UDP. | |
598 | * <0 if skb should be resubmitted as proto -N | |
599 | */ | |
600 | ||
601 | /* if we're overly short, let UDP handle it */ | |
602 | encap_rcv = ACCESS_ONCE(up->encap_rcv); | |
603 | if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) { | |
604 | int ret; | |
605 | ||
606 | ret = encap_rcv(sk, skb); | |
607 | if (ret <= 0) { | |
608 | UDP_INC_STATS_BH(sock_net(sk), | |
609 | UDP_MIB_INDATAGRAMS, | |
610 | is_udplite); | |
611 | return -ret; | |
612 | } | |
613 | } | |
614 | ||
615 | /* FALLTHROUGH -- it's a UDP Packet */ | |
616 | } | |
617 | ||
ba4e58ec GR |
618 | /* |
619 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
620 | */ | |
b2bf1e26 | 621 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
622 | |
623 | if (up->pcrlen == 0) { /* full coverage was set */ | |
624 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
625 | " %d while full coverage %d requested\n", | |
626 | UDP_SKB_CB(skb)->cscov, skb->len); | |
627 | goto drop; | |
628 | } | |
629 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
630 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
631 | "too small, need min %d\n", | |
632 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
633 | goto drop; | |
634 | } | |
1da177e4 LT |
635 | } |
636 | ||
33d480ce | 637 | if (rcu_access_pointer(sk->sk_filter)) { |
1ab6eb62 HX |
638 | if (udp_lib_checksum_complete(skb)) |
639 | goto drop; | |
640 | } | |
ba4e58ec | 641 | |
cb80ef46 BL |
642 | if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) |
643 | goto drop; | |
644 | ||
d826eb14 | 645 | skb_dst_drop(skb); |
cb75994e | 646 | |
cb80ef46 BL |
647 | bh_lock_sock(sk); |
648 | rc = 0; | |
649 | if (!sock_owned_by_user(sk)) | |
650 | rc = __udpv6_queue_rcv_skb(sk, skb); | |
651 | else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { | |
652 | bh_unlock_sock(sk); | |
653 | goto drop; | |
654 | } | |
655 | bh_unlock_sock(sk); | |
f7ad74fe BL |
656 | |
657 | return rc; | |
ba4e58ec | 658 | drop: |
ef28d1a2 | 659 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
cb80ef46 | 660 | atomic_inc(&sk->sk_drops); |
ba4e58ec GR |
661 | kfree_skb(skb); |
662 | return -1; | |
1da177e4 LT |
663 | } |
664 | ||
920a4611 | 665 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
b71d1d42 ED |
666 | __be16 loc_port, const struct in6_addr *loc_addr, |
667 | __be16 rmt_port, const struct in6_addr *rmt_addr, | |
1da177e4 LT |
668 | int dif) |
669 | { | |
88ab1932 | 670 | struct hlist_nulls_node *node; |
1da177e4 LT |
671 | struct sock *s = sk; |
672 | unsigned short num = ntohs(loc_port); | |
673 | ||
88ab1932 | 674 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
675 | struct inet_sock *inet = inet_sk(s); |
676 | ||
920a4611 | 677 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
678 | continue; |
679 | ||
d4cada4a ED |
680 | if (udp_sk(s)->udp_port_hash == num && |
681 | s->sk_family == PF_INET6) { | |
1da177e4 | 682 | struct ipv6_pinfo *np = inet6_sk(s); |
c720c7e8 ED |
683 | if (inet->inet_dport) { |
684 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
685 | continue; |
686 | } | |
687 | if (!ipv6_addr_any(&np->daddr) && | |
688 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
689 | continue; | |
690 | ||
691 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
692 | continue; | |
693 | ||
694 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
695 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
696 | continue; | |
1da177e4 | 697 | } |
add459aa | 698 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
699 | continue; |
700 | return s; | |
701 | } | |
702 | } | |
703 | return NULL; | |
704 | } | |
705 | ||
a1ab77f9 ED |
706 | static void flush_stack(struct sock **stack, unsigned int count, |
707 | struct sk_buff *skb, unsigned int final) | |
708 | { | |
cb80ef46 | 709 | struct sk_buff *skb1 = NULL; |
a1ab77f9 | 710 | struct sock *sk; |
cb80ef46 | 711 | unsigned int i; |
a1ab77f9 ED |
712 | |
713 | for (i = 0; i < count; i++) { | |
f6b8f32c | 714 | sk = stack[i]; |
cb80ef46 BL |
715 | if (likely(skb1 == NULL)) |
716 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
717 | if (!skb1) { | |
718 | atomic_inc(&sk->sk_drops); | |
719 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS, | |
720 | IS_UDPLITE(sk)); | |
721 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, | |
722 | IS_UDPLITE(sk)); | |
a1ab77f9 | 723 | } |
cb80ef46 BL |
724 | |
725 | if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) | |
726 | skb1 = NULL; | |
a1ab77f9 | 727 | } |
cb80ef46 BL |
728 | if (unlikely(skb1)) |
729 | kfree_skb(skb1); | |
a1ab77f9 | 730 | } |
1da177e4 LT |
731 | /* |
732 | * Note: called only from the BH handler context, | |
733 | * so we don't need to lock the hashes. | |
734 | */ | |
e3163493 | 735 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
b71d1d42 | 736 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
645ca708 | 737 | struct udp_table *udptable) |
1da177e4 | 738 | { |
a1ab77f9 | 739 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 740 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 741 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 742 | int dif; |
a1ab77f9 | 743 | unsigned int i, count = 0; |
1da177e4 | 744 | |
645ca708 | 745 | spin_lock(&hslot->lock); |
88ab1932 | 746 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 747 | dif = inet6_iif(skb); |
920a4611 | 748 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
749 | while (sk) { |
750 | stack[count++] = sk; | |
751 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
752 | uh->source, saddr, dif); | |
753 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
754 | if (!sk) | |
755 | break; | |
756 | flush_stack(stack, count, skb, ~0); | |
757 | count = 0; | |
95766fff | 758 | } |
1da177e4 | 759 | } |
a1ab77f9 ED |
760 | /* |
761 | * before releasing the lock, we must take reference on sockets | |
762 | */ | |
763 | for (i = 0; i < count; i++) | |
764 | sock_hold(stack[i]); | |
765 | ||
645ca708 | 766 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
767 | |
768 | if (count) { | |
769 | flush_stack(stack, count, skb, count - 1); | |
770 | ||
771 | for (i = 0; i < count; i++) | |
772 | sock_put(stack[i]); | |
773 | } else { | |
774 | kfree_skb(skb); | |
775 | } | |
ba4e58ec | 776 | return 0; |
1da177e4 LT |
777 | } |
778 | ||
645ca708 | 779 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 780 | int proto) |
1da177e4 | 781 | { |
3ffe533c | 782 | struct net *net = dev_net(skb->dev); |
1da177e4 | 783 | struct sock *sk; |
1ab1457c | 784 | struct udphdr *uh; |
b71d1d42 | 785 | const struct in6_addr *saddr, *daddr; |
1da177e4 LT |
786 | u32 ulen = 0; |
787 | ||
788 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 789 | goto discard; |
1da177e4 | 790 | |
0660e03f ACM |
791 | saddr = &ipv6_hdr(skb)->saddr; |
792 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 793 | uh = udp_hdr(skb); |
1da177e4 LT |
794 | |
795 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
796 | if (ulen > skb->len) |
797 | goto short_packet; | |
1da177e4 | 798 | |
759e5d00 HX |
799 | if (proto == IPPROTO_UDP) { |
800 | /* UDP validates ulen. */ | |
1da177e4 | 801 | |
ba4e58ec GR |
802 | /* Check for jumbo payload */ |
803 | if (ulen == 0) | |
804 | ulen = skb->len; | |
1da177e4 | 805 | |
ba4e58ec GR |
806 | if (ulen < sizeof(*uh)) |
807 | goto short_packet; | |
1da177e4 | 808 | |
ba4e58ec GR |
809 | if (ulen < skb->len) { |
810 | if (pskb_trim_rcsum(skb, ulen)) | |
811 | goto short_packet; | |
0660e03f ACM |
812 | saddr = &ipv6_hdr(skb)->saddr; |
813 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 814 | uh = udp_hdr(skb); |
ba4e58ec | 815 | } |
ba4e58ec | 816 | } |
1da177e4 | 817 | |
759e5d00 HX |
818 | if (udp6_csum_init(skb, uh, proto)) |
819 | goto discard; | |
820 | ||
1ab1457c YH |
821 | /* |
822 | * Multicast receive code | |
1da177e4 | 823 | */ |
ba4e58ec | 824 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
825 | return __udp6_lib_mcast_deliver(net, skb, |
826 | saddr, daddr, udptable); | |
1da177e4 LT |
827 | |
828 | /* Unicast */ | |
829 | ||
1ab1457c | 830 | /* |
1da177e4 LT |
831 | * check socket cache ... must talk to Alan about his plans |
832 | * for sock caches... i'll skip this for now. | |
833 | */ | |
607c4aaf | 834 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
cb80ef46 BL |
835 | if (sk != NULL) { |
836 | int ret = udpv6_queue_rcv_skb(sk, skb); | |
837 | sock_put(sk); | |
1da177e4 | 838 | |
cb80ef46 BL |
839 | /* a return value > 0 means to resubmit the input, but |
840 | * it wants the return to be -protocol, or 0 | |
841 | */ | |
842 | if (ret > 0) | |
843 | return -ret; | |
1da177e4 | 844 | |
add459aa | 845 | return 0; |
1da177e4 | 846 | } |
1ab1457c | 847 | |
cb80ef46 | 848 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
c377411f | 849 | goto discard; |
cb80ef46 BL |
850 | |
851 | if (udp_lib_checksum_complete(skb)) | |
55349790 | 852 | goto discard; |
cb80ef46 BL |
853 | |
854 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); | |
855 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); | |
856 | ||
857 | kfree_skb(skb); | |
add459aa | 858 | return 0; |
1da177e4 | 859 | |
1ab1457c | 860 | short_packet: |
d6bc0149 | 861 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 862 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
863 | saddr, |
864 | ntohs(uh->source), | |
865 | ulen, | |
866 | skb->len, | |
867 | daddr, | |
868 | ntohs(uh->dest)); | |
1da177e4 LT |
869 | |
870 | discard: | |
ef28d1a2 | 871 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 872 | kfree_skb(skb); |
add459aa | 873 | return 0; |
1da177e4 | 874 | } |
ba4e58ec | 875 | |
e5bbef20 | 876 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 877 | { |
645ca708 | 878 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
879 | } |
880 | ||
1da177e4 LT |
881 | /* |
882 | * Throw away all pending data and cancel the corking. Socket is locked. | |
883 | */ | |
884 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
885 | { | |
886 | struct udp_sock *up = udp_sk(sk); | |
887 | ||
36d926b9 DL |
888 | if (up->pending == AF_INET) |
889 | udp_flush_pending_frames(sk); | |
890 | else if (up->pending) { | |
1da177e4 LT |
891 | up->len = 0; |
892 | up->pending = 0; | |
893 | ip6_flush_pending_frames(sk); | |
1ab1457c | 894 | } |
1da177e4 LT |
895 | } |
896 | ||
493c6be3 SS |
897 | /** |
898 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
899 | * @sk: socket we are sending on | |
900 | * @skb: sk_buff containing the filled-in UDP header | |
901 | * (checksum field must be zeroed out) | |
902 | */ | |
903 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
904 | const struct in6_addr *saddr, | |
905 | const struct in6_addr *daddr, int len) | |
906 | { | |
907 | unsigned int offset; | |
908 | struct udphdr *uh = udp_hdr(skb); | |
909 | __wsum csum = 0; | |
910 | ||
911 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
912 | /* Only one fragment on the socket. */ | |
913 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
914 | skb->csum_offset = offsetof(struct udphdr, check); | |
915 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
916 | } else { | |
917 | /* | |
918 | * HW-checksum won't work as there are two or more | |
919 | * fragments on the socket so that all csums of sk_buffs | |
920 | * should be together | |
921 | */ | |
922 | offset = skb_transport_offset(skb); | |
923 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
924 | ||
925 | skb->ip_summed = CHECKSUM_NONE; | |
926 | ||
927 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
928 | csum = csum_add(csum, skb->csum); | |
929 | } | |
930 | ||
931 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
932 | csum); | |
933 | if (uh->check == 0) | |
934 | uh->check = CSUM_MANGLED_0; | |
935 | } | |
936 | } | |
937 | ||
1da177e4 LT |
938 | /* |
939 | * Sending | |
940 | */ | |
941 | ||
4c0a6cb0 | 942 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
943 | { |
944 | struct sk_buff *skb; | |
945 | struct udphdr *uh; | |
4c0a6cb0 | 946 | struct udp_sock *up = udp_sk(sk); |
1da177e4 | 947 | struct inet_sock *inet = inet_sk(sk); |
4c9483b2 | 948 | struct flowi6 *fl6 = &inet->cork.fl.u.ip6; |
1da177e4 | 949 | int err = 0; |
b2bf1e26 | 950 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 951 | __wsum csum = 0; |
1da177e4 LT |
952 | |
953 | /* Grab the skbuff where UDP header space exists. */ | |
954 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
955 | goto out; | |
956 | ||
957 | /* | |
958 | * Create a UDP header | |
959 | */ | |
4bedb452 | 960 | uh = udp_hdr(skb); |
1958b856 DM |
961 | uh->source = fl6->fl6_sport; |
962 | uh->dest = fl6->fl6_dport; | |
1da177e4 LT |
963 | uh->len = htons(up->len); |
964 | uh->check = 0; | |
965 | ||
b2bf1e26 | 966 | if (is_udplite) |
ba4e58ec | 967 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 | 968 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
4c9483b2 | 969 | udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, |
493c6be3 SS |
970 | up->len); |
971 | goto send; | |
972 | } else | |
ba4e58ec | 973 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 974 | |
ba4e58ec | 975 | /* add protocol-dependent pseudo-header */ |
4c9483b2 DM |
976 | uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
977 | up->len, fl6->flowi6_proto, csum); | |
1da177e4 | 978 | if (uh->check == 0) |
f6ab0288 | 979 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 980 | |
493c6be3 | 981 | send: |
1da177e4 | 982 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
983 | if (err) { |
984 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
985 | UDP6_INC_STATS_USER(sock_net(sk), | |
986 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
987 | err = 0; | |
988 | } | |
989 | } else | |
990 | UDP6_INC_STATS_USER(sock_net(sk), | |
991 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
992 | out: |
993 | up->len = 0; | |
994 | up->pending = 0; | |
995 | return err; | |
996 | } | |
997 | ||
ba4e58ec | 998 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
999 | struct msghdr *msg, size_t len) |
1000 | { | |
1001 | struct ipv6_txoptions opt_space; | |
1002 | struct udp_sock *up = udp_sk(sk); | |
1003 | struct inet_sock *inet = inet_sk(sk); | |
1004 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1005 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 1006 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
1007 | struct ipv6_txoptions *opt = NULL; |
1008 | struct ip6_flowlabel *flowlabel = NULL; | |
4c9483b2 | 1009 | struct flowi6 fl6; |
1da177e4 LT |
1010 | struct dst_entry *dst; |
1011 | int addr_len = msg->msg_namelen; | |
1012 | int ulen = len; | |
1013 | int hlimit = -1; | |
41a1f8ea | 1014 | int tclass = -1; |
13b52cd4 | 1015 | int dontfrag = -1; |
1da177e4 LT |
1016 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
1017 | int err; | |
987905de | 1018 | int connected = 0; |
b2bf1e26 | 1019 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 1020 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
1021 | |
1022 | /* destination address check */ | |
1023 | if (sin6) { | |
1024 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | switch (sin6->sin6_family) { | |
1028 | case AF_INET6: | |
1029 | if (addr_len < SIN6_LEN_RFC2133) | |
1030 | return -EINVAL; | |
1031 | daddr = &sin6->sin6_addr; | |
1032 | break; | |
1033 | case AF_INET: | |
1034 | goto do_udp_sendmsg; | |
1035 | case AF_UNSPEC: | |
1036 | msg->msg_name = sin6 = NULL; | |
1037 | msg->msg_namelen = addr_len = 0; | |
1038 | daddr = NULL; | |
1039 | break; | |
1040 | default: | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | } else if (!up->pending) { | |
1044 | if (sk->sk_state != TCP_ESTABLISHED) | |
1045 | return -EDESTADDRREQ; | |
1046 | daddr = &np->daddr; | |
1ab1457c | 1047 | } else |
1da177e4 LT |
1048 | daddr = NULL; |
1049 | ||
1050 | if (daddr) { | |
e773e4fa | 1051 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
1052 | struct sockaddr_in sin; |
1053 | sin.sin_family = AF_INET; | |
c720c7e8 | 1054 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
1055 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
1056 | msg->msg_name = &sin; | |
1057 | msg->msg_namelen = sizeof(sin); | |
1058 | do_udp_sendmsg: | |
1059 | if (__ipv6_only_sock(sk)) | |
1060 | return -ENETUNREACH; | |
1061 | return udp_sendmsg(iocb, sk, msg, len); | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | if (up->pending == AF_INET) | |
1066 | return udp_sendmsg(iocb, sk, msg, len); | |
1067 | ||
1068 | /* Rough check on arithmetic overflow, | |
b59e139b | 1069 | better check is made in ip6_append_data(). |
1da177e4 LT |
1070 | */ |
1071 | if (len > INT_MAX - sizeof(struct udphdr)) | |
1072 | return -EMSGSIZE; | |
1ab1457c | 1073 | |
1da177e4 LT |
1074 | if (up->pending) { |
1075 | /* | |
1076 | * There are pending frames. | |
1077 | * The socket lock must be held while it's corked. | |
1078 | */ | |
1079 | lock_sock(sk); | |
1080 | if (likely(up->pending)) { | |
1081 | if (unlikely(up->pending != AF_INET6)) { | |
1082 | release_sock(sk); | |
1083 | return -EAFNOSUPPORT; | |
1084 | } | |
1085 | dst = NULL; | |
1086 | goto do_append_data; | |
1087 | } | |
1088 | release_sock(sk); | |
1089 | } | |
1090 | ulen += sizeof(struct udphdr); | |
1091 | ||
4c9483b2 | 1092 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 LT |
1093 | |
1094 | if (sin6) { | |
1095 | if (sin6->sin6_port == 0) | |
1096 | return -EINVAL; | |
1097 | ||
1958b856 | 1098 | fl6.fl6_dport = sin6->sin6_port; |
1da177e4 LT |
1099 | daddr = &sin6->sin6_addr; |
1100 | ||
1101 | if (np->sndflow) { | |
4c9483b2 DM |
1102 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1103 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
1104 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1105 | if (flowlabel == NULL) |
1106 | return -EINVAL; | |
1107 | daddr = &flowlabel->dst; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * Otherwise it will be difficult to maintain | |
1113 | * sk->sk_dst_cache. | |
1114 | */ | |
1115 | if (sk->sk_state == TCP_ESTABLISHED && | |
1116 | ipv6_addr_equal(daddr, &np->daddr)) | |
1117 | daddr = &np->daddr; | |
1118 | ||
1119 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1120 | sin6->sin6_scope_id && | |
1121 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
4c9483b2 | 1122 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 LT |
1123 | } else { |
1124 | if (sk->sk_state != TCP_ESTABLISHED) | |
1125 | return -EDESTADDRREQ; | |
1126 | ||
1958b856 | 1127 | fl6.fl6_dport = inet->inet_dport; |
1da177e4 | 1128 | daddr = &np->daddr; |
4c9483b2 | 1129 | fl6.flowlabel = np->flow_label; |
987905de | 1130 | connected = 1; |
1da177e4 LT |
1131 | } |
1132 | ||
4c9483b2 DM |
1133 | if (!fl6.flowi6_oif) |
1134 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 | 1135 | |
4c9483b2 DM |
1136 | if (!fl6.flowi6_oif) |
1137 | fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; | |
9f690db7 | 1138 | |
4c9483b2 | 1139 | fl6.flowi6_mark = sk->sk_mark; |
51953d5b | 1140 | |
1da177e4 LT |
1141 | if (msg->msg_controllen) { |
1142 | opt = &opt_space; | |
1143 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1144 | opt->tot_len = sizeof(*opt); | |
1145 | ||
73df66f8 TP |
1146 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
1147 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
1148 | if (err < 0) { |
1149 | fl6_sock_release(flowlabel); | |
1150 | return err; | |
1151 | } | |
4c9483b2 DM |
1152 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1153 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1154 | if (flowlabel == NULL) |
1155 | return -EINVAL; | |
1156 | } | |
1157 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1158 | opt = NULL; | |
987905de | 1159 | connected = 0; |
1da177e4 LT |
1160 | } |
1161 | if (opt == NULL) | |
1162 | opt = np->opt; | |
df9890c3 YH |
1163 | if (flowlabel) |
1164 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1165 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1166 | |
4c9483b2 | 1167 | fl6.flowi6_proto = sk->sk_protocol; |
876c7f41 | 1168 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 1169 | fl6.daddr = *daddr; |
876c7f41 | 1170 | else |
4c9483b2 DM |
1171 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
1172 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 1173 | fl6.saddr = np->saddr; |
1958b856 | 1174 | fl6.fl6_sport = inet->inet_sport; |
1ab1457c | 1175 | |
4c9483b2 | 1176 | final_p = fl6_update_dst(&fl6, opt, &final); |
20c59de2 | 1177 | if (final_p) |
987905de | 1178 | connected = 0; |
1da177e4 | 1179 | |
4c9483b2 DM |
1180 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { |
1181 | fl6.flowi6_oif = np->mcast_oif; | |
987905de | 1182 | connected = 0; |
c4062dfc EH |
1183 | } else if (!fl6.flowi6_oif) |
1184 | fl6.flowi6_oif = np->ucast_oif; | |
1da177e4 | 1185 | |
4c9483b2 | 1186 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
beb8d13b | 1187 | |
4c9483b2 | 1188 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); |
68d0c6d3 DM |
1189 | if (IS_ERR(dst)) { |
1190 | err = PTR_ERR(dst); | |
1191 | dst = NULL; | |
1da177e4 | 1192 | goto out; |
14e50e57 | 1193 | } |
1da177e4 LT |
1194 | |
1195 | if (hlimit < 0) { | |
4c9483b2 | 1196 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
1da177e4 LT |
1197 | hlimit = np->mcast_hops; |
1198 | else | |
1199 | hlimit = np->hop_limit; | |
1200 | if (hlimit < 0) | |
6b75d090 | 1201 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1202 | } |
1203 | ||
e651f03a | 1204 | if (tclass < 0) |
41a1f8ea | 1205 | tclass = np->tclass; |
41a1f8ea | 1206 | |
13b52cd4 BH |
1207 | if (dontfrag < 0) |
1208 | dontfrag = np->dontfrag; | |
1209 | ||
1da177e4 LT |
1210 | if (msg->msg_flags&MSG_CONFIRM) |
1211 | goto do_confirm; | |
1212 | back_from_confirm: | |
1213 | ||
1214 | lock_sock(sk); | |
1215 | if (unlikely(up->pending)) { | |
1216 | /* The socket is already corked while preparing it. */ | |
1217 | /* ... which is an evident application bug. --ANK */ | |
1218 | release_sock(sk); | |
1219 | ||
64ce2073 | 1220 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1221 | err = -EINVAL; |
1222 | goto out; | |
1223 | } | |
1224 | ||
1225 | up->pending = AF_INET6; | |
1226 | ||
1227 | do_append_data: | |
1228 | up->len += ulen; | |
ba4e58ec GR |
1229 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1230 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
4c9483b2 | 1231 | sizeof(struct udphdr), hlimit, tclass, opt, &fl6, |
41a1f8ea | 1232 | (struct rt6_info*)dst, |
13b52cd4 | 1233 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1234 | if (err) |
1235 | udp_v6_flush_pending_frames(sk); | |
1236 | else if (!corkreq) | |
4c0a6cb0 | 1237 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1238 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1239 | up->pending = 0; | |
1da177e4 | 1240 | |
a5e7c210 DM |
1241 | if (dst) { |
1242 | if (connected) { | |
1243 | ip6_dst_store(sk, dst, | |
4c9483b2 | 1244 | ipv6_addr_equal(&fl6.daddr, &np->daddr) ? |
8e1ef0a9 YH |
1245 | &np->daddr : NULL, |
1246 | #ifdef CONFIG_IPV6_SUBTREES | |
4c9483b2 | 1247 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
8e1ef0a9 YH |
1248 | &np->saddr : |
1249 | #endif | |
1250 | NULL); | |
a5e7c210 DM |
1251 | } else { |
1252 | dst_release(dst); | |
1253 | } | |
a3c96089 | 1254 | dst = NULL; |
a5e7c210 DM |
1255 | } |
1256 | ||
1da177e4 LT |
1257 | if (err > 0) |
1258 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1259 | release_sock(sk); | |
1260 | out: | |
a3c96089 | 1261 | dst_release(dst); |
1da177e4 | 1262 | fl6_sock_release(flowlabel); |
cd562c98 | 1263 | if (!err) |
1da177e4 | 1264 | return len; |
a18135eb DM |
1265 | /* |
1266 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1267 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1268 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1269 | * things). We could add another new stat but at least for now that | |
1270 | * seems like overkill. | |
1271 | */ | |
1272 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1273 | UDP6_INC_STATS_USER(sock_net(sk), |
1274 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1275 | } |
1da177e4 LT |
1276 | return err; |
1277 | ||
1278 | do_confirm: | |
1279 | dst_confirm(dst); | |
1280 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1281 | goto back_from_confirm; | |
1282 | err = 0; | |
1283 | goto out; | |
1284 | } | |
1285 | ||
7d06b2e0 | 1286 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
1287 | { |
1288 | lock_sock(sk); | |
1289 | udp_v6_flush_pending_frames(sk); | |
1290 | release_sock(sk); | |
1291 | ||
1292 | inet6_destroy_sock(sk); | |
1da177e4 LT |
1293 | } |
1294 | ||
1295 | /* | |
1296 | * Socket option code for UDP | |
1297 | */ | |
ba4e58ec | 1298 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1299 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1300 | { |
db8dac20 | 1301 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1302 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1303 | udp_v6_push_pending_frames); | |
ba4e58ec | 1304 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1305 | } |
1306 | ||
1307 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1308 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1309 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1310 | { |
db8dac20 | 1311 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1312 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1313 | udp_v6_push_pending_frames); | |
ba4e58ec | 1314 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1315 | } |
1316 | #endif | |
1317 | ||
ba4e58ec GR |
1318 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1319 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1320 | { |
db8dac20 | 1321 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1322 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1323 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1324 | } |
1325 | ||
1326 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1327 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1328 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1329 | { |
db8dac20 | 1330 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1331 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1332 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1333 | } |
1334 | #endif | |
1335 | ||
41135cc8 | 1336 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1337 | .handler = udpv6_rcv, |
1338 | .err_handler = udpv6_err, | |
1339 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1340 | }; | |
1341 | ||
1342 | /* ------------------------------------------------------------------------ */ | |
1343 | #ifdef CONFIG_PROC_FS | |
1344 | ||
1345 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1346 | { | |
1347 | struct inet_sock *inet = inet_sk(sp); | |
1348 | struct ipv6_pinfo *np = inet6_sk(sp); | |
b71d1d42 | 1349 | const struct in6_addr *dest, *src; |
1da177e4 LT |
1350 | __u16 destp, srcp; |
1351 | ||
1352 | dest = &np->daddr; | |
1353 | src = &np->rcv_saddr; | |
c720c7e8 ED |
1354 | destp = ntohs(inet->inet_dport); |
1355 | srcp = ntohs(inet->inet_sport); | |
1da177e4 | 1356 | seq_printf(seq, |
f86dcc5a | 1357 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
71338aa7 | 1358 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", |
1da177e4 LT |
1359 | bucket, |
1360 | src->s6_addr32[0], src->s6_addr32[1], | |
1361 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1362 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1363 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1364 | sp->sk_state, |
31e6d363 ED |
1365 | sk_wmem_alloc_get(sp), |
1366 | sk_rmem_alloc_get(sp), | |
1da177e4 | 1367 | 0, 0L, 0, |
a7cb5a49 EB |
1368 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), |
1369 | 0, | |
1da177e4 | 1370 | sock_i_ino(sp), |
cb61cb9b ED |
1371 | atomic_read(&sp->sk_refcnt), sp, |
1372 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1373 | } |
1374 | ||
ba4e58ec | 1375 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1376 | { |
1377 | if (v == SEQ_START_TOKEN) | |
1378 | seq_printf(seq, | |
1379 | " sl " | |
1380 | "local_address " | |
1381 | "remote_address " | |
1382 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1383 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1384 | else |
1385 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1386 | return 0; | |
1387 | } | |
1388 | ||
73cb88ec AV |
1389 | static const struct file_operations udp6_afinfo_seq_fops = { |
1390 | .owner = THIS_MODULE, | |
1391 | .open = udp_seq_open, | |
1392 | .read = seq_read, | |
1393 | .llseek = seq_lseek, | |
1394 | .release = seq_release_net | |
1395 | }; | |
1396 | ||
1da177e4 | 1397 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1398 | .name = "udp6", |
1399 | .family = AF_INET6, | |
645ca708 | 1400 | .udp_table = &udp_table, |
73cb88ec | 1401 | .seq_fops = &udp6_afinfo_seq_fops, |
dda61925 DL |
1402 | .seq_ops = { |
1403 | .show = udp6_seq_show, | |
1404 | }, | |
1da177e4 LT |
1405 | }; |
1406 | ||
2c8c1e72 | 1407 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1408 | { |
0c96d8c5 | 1409 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1410 | } |
1411 | ||
0c96d8c5 DL |
1412 | void udp6_proc_exit(struct net *net) { |
1413 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1414 | } |
1415 | #endif /* CONFIG_PROC_FS */ | |
1416 | ||
1417 | /* ------------------------------------------------------------------------ */ | |
1418 | ||
1419 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1420 | .name = "UDPv6", |
1421 | .owner = THIS_MODULE, | |
ba4e58ec | 1422 | .close = udp_lib_close, |
543d9cfe ACM |
1423 | .connect = ip6_datagram_connect, |
1424 | .disconnect = udp_disconnect, | |
1425 | .ioctl = udp_ioctl, | |
1426 | .destroy = udpv6_destroy_sock, | |
1427 | .setsockopt = udpv6_setsockopt, | |
1428 | .getsockopt = udpv6_getsockopt, | |
1429 | .sendmsg = udpv6_sendmsg, | |
1430 | .recvmsg = udpv6_recvmsg, | |
f7ad74fe | 1431 | .backlog_rcv = __udpv6_queue_rcv_skb, |
ba4e58ec GR |
1432 | .hash = udp_lib_hash, |
1433 | .unhash = udp_lib_unhash, | |
719f8358 | 1434 | .rehash = udp_v6_rehash, |
543d9cfe | 1435 | .get_port = udp_v6_get_port, |
95766fff HA |
1436 | .memory_allocated = &udp_memory_allocated, |
1437 | .sysctl_mem = sysctl_udp_mem, | |
1438 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1439 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1440 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1441 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1442 | .h.udp_table = &udp_table, |
3fdadf7d | 1443 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1444 | .compat_setsockopt = compat_udpv6_setsockopt, |
1445 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1446 | #endif |
fcbdf09d | 1447 | .clear_sk = sk_prot_clear_portaddr_nulls, |
1da177e4 LT |
1448 | }; |
1449 | ||
1da177e4 LT |
1450 | static struct inet_protosw udpv6_protosw = { |
1451 | .type = SOCK_DGRAM, | |
1452 | .protocol = IPPROTO_UDP, | |
1453 | .prot = &udpv6_prot, | |
1454 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1455 | .no_check = UDP_CSUM_DEFAULT, |
1456 | .flags = INET_PROTOSW_PERMANENT, | |
1457 | }; | |
1458 | ||
1459 | ||
7f4e4868 | 1460 | int __init udpv6_init(void) |
1da177e4 | 1461 | { |
7f4e4868 DL |
1462 | int ret; |
1463 | ||
3336288a VY |
1464 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); |
1465 | if (ret) | |
c6b641a4 | 1466 | goto out; |
3336288a | 1467 | |
7f4e4868 DL |
1468 | ret = inet6_register_protosw(&udpv6_protosw); |
1469 | if (ret) | |
1470 | goto out_udpv6_protocol; | |
1471 | out: | |
1472 | return ret; | |
1473 | ||
1474 | out_udpv6_protocol: | |
1475 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1476 | goto out; | |
1477 | } | |
1478 | ||
09f7709f | 1479 | void udpv6_exit(void) |
7f4e4868 DL |
1480 | { |
1481 | inet6_unregister_protosw(&udpv6_protosw); | |
1482 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1483 | } |