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> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | ||
1da177e4 LT |
39 | #include <net/ndisc.h> |
40 | #include <net/protocol.h> | |
41 | #include <net/transp_v6.h> | |
42 | #include <net/ip6_route.h> | |
1da177e4 | 43 | #include <net/raw.h> |
c752f073 | 44 | #include <net/tcp_states.h> |
1da177e4 LT |
45 | #include <net/ip6_checksum.h> |
46 | #include <net/xfrm.h> | |
47 | ||
48 | #include <linux/proc_fs.h> | |
49 | #include <linux/seq_file.h> | |
ba4e58ec | 50 | #include "udp_impl.h" |
1da177e4 | 51 | |
b2f5e7cd VY |
52 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
53 | { | |
54 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
55 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); | |
56 | int sk_ipv6only = ipv6_only_sock(sk); | |
57 | int sk2_ipv6only = inet_v6_ipv6only(sk2); | |
58 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); | |
59 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
60 | ||
61 | /* if both are mapped, treat as IPv4 */ | |
62 | if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) | |
63 | return ipv4_rcv_saddr_equal(sk, sk2); | |
64 | ||
65 | if (addr_type2 == IPV6_ADDR_ANY && | |
66 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
67 | return 1; | |
68 | ||
69 | if (addr_type == IPV6_ADDR_ANY && | |
70 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
71 | return 1; | |
72 | ||
73 | if (sk2_rcv_saddr6 && | |
74 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
75 | return 1; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
6ba5a3c5 | 80 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 81 | { |
6ba5a3c5 | 82 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal); |
1da177e4 LT |
83 | } |
84 | ||
645ca708 ED |
85 | static inline int compute_score(struct sock *sk, struct net *net, |
86 | unsigned short hnum, | |
87 | struct in6_addr *saddr, __be16 sport, | |
88 | struct in6_addr *daddr, __be16 dport, | |
89 | int dif) | |
90 | { | |
91 | int score = -1; | |
92 | ||
93 | if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum && | |
94 | sk->sk_family == PF_INET6) { | |
95 | struct ipv6_pinfo *np = inet6_sk(sk); | |
96 | struct inet_sock *inet = inet_sk(sk); | |
97 | ||
98 | score = 0; | |
99 | if (inet->dport) { | |
100 | if (inet->dport != sport) | |
101 | return -1; | |
102 | score++; | |
103 | } | |
104 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
105 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
106 | return -1; | |
107 | score++; | |
108 | } | |
109 | if (!ipv6_addr_any(&np->daddr)) { | |
110 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
111 | return -1; | |
112 | score++; | |
113 | } | |
114 | if (sk->sk_bound_dev_if) { | |
115 | if (sk->sk_bound_dev_if != dif) | |
116 | return -1; | |
117 | score++; | |
118 | } | |
119 | } | |
120 | return score; | |
121 | } | |
122 | ||
fa4d3c62 PE |
123 | static struct sock *__udp6_lib_lookup(struct net *net, |
124 | struct in6_addr *saddr, __be16 sport, | |
ba4e58ec | 125 | struct in6_addr *daddr, __be16 dport, |
645ca708 | 126 | int dif, struct udp_table *udptable) |
1da177e4 | 127 | { |
271b72c7 | 128 | struct sock *sk, *result; |
88ab1932 | 129 | struct hlist_nulls_node *node; |
1da177e4 | 130 | unsigned short hnum = ntohs(dport); |
645ca708 ED |
131 | unsigned int hash = udp_hashfn(net, hnum); |
132 | struct udp_hslot *hslot = &udptable->hash[hash]; | |
271b72c7 | 133 | int score, badness; |
645ca708 | 134 | |
271b72c7 ED |
135 | rcu_read_lock(); |
136 | begin: | |
137 | result = NULL; | |
138 | badness = -1; | |
88ab1932 | 139 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
140 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
141 | if (score > badness) { | |
142 | result = sk; | |
143 | badness = score; | |
1da177e4 LT |
144 | } |
145 | } | |
88ab1932 ED |
146 | /* |
147 | * if the nulls value we got at the end of this lookup is | |
148 | * not the expected one, we must restart lookup. | |
149 | * We probably met an item that was moved to another chain. | |
150 | */ | |
151 | if (get_nulls_value(node) != hash) | |
152 | goto begin; | |
153 | ||
271b72c7 ED |
154 | if (result) { |
155 | if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) | |
156 | result = NULL; | |
157 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
158 | daddr, dport, dif) < badness)) { | |
159 | sock_put(result); | |
160 | goto begin; | |
161 | } | |
162 | } | |
163 | rcu_read_unlock(); | |
1da177e4 LT |
164 | return result; |
165 | } | |
166 | ||
607c4aaf KK |
167 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
168 | __be16 sport, __be16 dport, | |
645ca708 | 169 | struct udp_table *udptable) |
607c4aaf | 170 | { |
23542618 | 171 | struct sock *sk; |
607c4aaf KK |
172 | struct ipv6hdr *iph = ipv6_hdr(skb); |
173 | ||
23542618 KK |
174 | if (unlikely(sk = skb_steal_sock(skb))) |
175 | return sk; | |
176 | else | |
177 | return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport, | |
178 | &iph->daddr, dport, inet6_iif(skb), | |
179 | udptable); | |
607c4aaf KK |
180 | } |
181 | ||
1da177e4 LT |
182 | /* |
183 | * This should be easy, if there is something there we | |
184 | * return it, otherwise we block. | |
185 | */ | |
186 | ||
ba4e58ec | 187 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
188 | struct msghdr *msg, size_t len, |
189 | int noblock, int flags, int *addr_len) | |
190 | { | |
191 | struct ipv6_pinfo *np = inet6_sk(sk); | |
192 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 193 | struct sk_buff *skb; |
759e5d00 | 194 | unsigned int ulen, copied; |
a59322be | 195 | int peeked; |
759e5d00 HX |
196 | int err; |
197 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 198 | int is_udp4; |
1da177e4 | 199 | |
1ab1457c YH |
200 | if (addr_len) |
201 | *addr_len=sizeof(struct sockaddr_in6); | |
202 | ||
1da177e4 LT |
203 | if (flags & MSG_ERRQUEUE) |
204 | return ipv6_recv_error(sk, msg, len); | |
205 | ||
206 | try_again: | |
a59322be HX |
207 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
208 | &peeked, &err); | |
1da177e4 LT |
209 | if (!skb) |
210 | goto out; | |
211 | ||
759e5d00 HX |
212 | ulen = skb->len - sizeof(struct udphdr); |
213 | copied = len; | |
214 | if (copied > ulen) | |
215 | copied = ulen; | |
216 | else if (copied < ulen) | |
1ab1457c | 217 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 218 | |
f26ba175 WY |
219 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
220 | ||
ba4e58ec | 221 | /* |
759e5d00 HX |
222 | * If checksum is needed at all, try to do it while copying the |
223 | * data. If the data is truncated, or if we only want a partial | |
224 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 225 | */ |
ba4e58ec | 226 | |
759e5d00 HX |
227 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
228 | if (udp_lib_checksum_complete(skb)) | |
1da177e4 | 229 | goto csum_copy_err; |
ba4e58ec GR |
230 | } |
231 | ||
60476372 | 232 | if (skb_csum_unnecessary(skb)) |
ba4e58ec GR |
233 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
234 | msg->msg_iov, copied ); | |
235 | else { | |
1da177e4 LT |
236 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
237 | if (err == -EINVAL) | |
238 | goto csum_copy_err; | |
239 | } | |
240 | if (err) | |
241 | goto out_free; | |
242 | ||
f26ba175 WY |
243 | if (!peeked) { |
244 | if (is_udp4) | |
245 | UDP_INC_STATS_USER(sock_net(sk), | |
246 | UDP_MIB_INDATAGRAMS, is_udplite); | |
247 | else | |
248 | UDP6_INC_STATS_USER(sock_net(sk), | |
249 | UDP_MIB_INDATAGRAMS, is_udplite); | |
250 | } | |
cb75994e | 251 | |
1da177e4 LT |
252 | sock_recv_timestamp(msg, sk, skb); |
253 | ||
254 | /* Copy the address. */ | |
255 | if (msg->msg_name) { | |
256 | struct sockaddr_in6 *sin6; | |
1ab1457c | 257 | |
1da177e4 LT |
258 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
259 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 260 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
261 | sin6->sin6_flowinfo = 0; |
262 | sin6->sin6_scope_id = 0; | |
263 | ||
f26ba175 | 264 | if (is_udp4) |
1da177e4 | 265 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, |
eddc9ec5 | 266 | htonl(0xffff), ip_hdr(skb)->saddr); |
1da177e4 | 267 | else { |
0660e03f ACM |
268 | ipv6_addr_copy(&sin6->sin6_addr, |
269 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
270 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
271 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
272 | } | |
273 | ||
274 | } | |
f26ba175 | 275 | if (is_udp4) { |
1da177e4 LT |
276 | if (inet->cmsg_flags) |
277 | ip_cmsg_recv(msg, skb); | |
278 | } else { | |
279 | if (np->rxopt.all) | |
280 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 281 | } |
1da177e4 LT |
282 | |
283 | err = copied; | |
284 | if (flags & MSG_TRUNC) | |
759e5d00 | 285 | err = ulen; |
1da177e4 LT |
286 | |
287 | out_free: | |
95766fff | 288 | lock_sock(sk); |
1da177e4 | 289 | skb_free_datagram(sk, skb); |
95766fff | 290 | release_sock(sk); |
1da177e4 LT |
291 | out: |
292 | return err; | |
293 | ||
294 | csum_copy_err: | |
95766fff | 295 | lock_sock(sk); |
0856f939 WY |
296 | if (!skb_kill_datagram(sk, skb, flags)) { |
297 | if (is_udp4) | |
298 | UDP_INC_STATS_USER(sock_net(sk), | |
299 | UDP_MIB_INERRORS, is_udplite); | |
300 | else | |
301 | UDP6_INC_STATS_USER(sock_net(sk), | |
302 | UDP_MIB_INERRORS, is_udplite); | |
303 | } | |
95766fff | 304 | release_sock(sk); |
1da177e4 | 305 | |
7a0ff716 | 306 | if (flags & MSG_DONTWAIT) |
1da177e4 | 307 | return -EAGAIN; |
1da177e4 LT |
308 | goto try_again; |
309 | } | |
310 | ||
ba4e58ec GR |
311 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
312 | int type, int code, int offset, __be32 info, | |
645ca708 | 313 | struct udp_table *udptable) |
1da177e4 LT |
314 | { |
315 | struct ipv6_pinfo *np; | |
316 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
317 | struct in6_addr *saddr = &hdr->saddr; |
318 | struct in6_addr *daddr = &hdr->daddr; | |
319 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
320 | struct sock *sk; | |
321 | int err; | |
322 | ||
c346dca1 | 323 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 324 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
325 | if (sk == NULL) |
326 | return; | |
327 | ||
328 | np = inet6_sk(sk); | |
329 | ||
330 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
331 | goto out; | |
332 | ||
333 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
334 | goto out; | |
335 | ||
336 | if (np->recverr) | |
337 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
338 | ||
339 | sk->sk_err = err; | |
340 | sk->sk_error_report(sk); | |
341 | out: | |
342 | sock_put(sk); | |
343 | } | |
344 | ||
ba4e58ec GR |
345 | static __inline__ void udpv6_err(struct sk_buff *skb, |
346 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 347 | int code, int offset, __be32 info ) |
ba4e58ec | 348 | { |
645ca708 | 349 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
350 | } |
351 | ||
352 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 353 | { |
ba4e58ec | 354 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 355 | int rc; |
b2bf1e26 | 356 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 357 | |
ba4e58ec GR |
358 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
359 | goto drop; | |
1da177e4 | 360 | |
ba4e58ec GR |
361 | /* |
362 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
363 | */ | |
b2bf1e26 | 364 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
365 | |
366 | if (up->pcrlen == 0) { /* full coverage was set */ | |
367 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
368 | " %d while full coverage %d requested\n", | |
369 | UDP_SKB_CB(skb)->cscov, skb->len); | |
370 | goto drop; | |
371 | } | |
372 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
373 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
374 | "too small, need min %d\n", | |
375 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
376 | goto drop; | |
377 | } | |
1da177e4 LT |
378 | } |
379 | ||
1ab6eb62 HX |
380 | if (sk->sk_filter) { |
381 | if (udp_lib_checksum_complete(skb)) | |
382 | goto drop; | |
383 | } | |
ba4e58ec | 384 | |
a18135eb DM |
385 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
386 | /* Note that an ENOMEM error is charged twice */ | |
cb61cb9b | 387 | if (rc == -ENOMEM) { |
ef28d1a2 PE |
388 | UDP6_INC_STATS_BH(sock_net(sk), |
389 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
cb61cb9b ED |
390 | atomic_inc(&sk->sk_drops); |
391 | } | |
ba4e58ec | 392 | goto drop; |
1da177e4 | 393 | } |
cb75994e | 394 | |
1da177e4 | 395 | return 0; |
ba4e58ec | 396 | drop: |
ef28d1a2 | 397 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
398 | kfree_skb(skb); |
399 | return -1; | |
1da177e4 LT |
400 | } |
401 | ||
920a4611 | 402 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
403 | __be16 loc_port, struct in6_addr *loc_addr, |
404 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
405 | int dif) |
406 | { | |
88ab1932 | 407 | struct hlist_nulls_node *node; |
1da177e4 LT |
408 | struct sock *s = sk; |
409 | unsigned short num = ntohs(loc_port); | |
410 | ||
88ab1932 | 411 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
412 | struct inet_sock *inet = inet_sk(s); |
413 | ||
920a4611 | 414 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
415 | continue; |
416 | ||
95f30b33 | 417 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
418 | struct ipv6_pinfo *np = inet6_sk(s); |
419 | if (inet->dport) { | |
420 | if (inet->dport != rmt_port) | |
421 | continue; | |
422 | } | |
423 | if (!ipv6_addr_any(&np->daddr) && | |
424 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
425 | continue; | |
426 | ||
427 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
428 | continue; | |
429 | ||
430 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
431 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
432 | continue; | |
1da177e4 | 433 | } |
add459aa | 434 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
435 | continue; |
436 | return s; | |
437 | } | |
438 | } | |
439 | return NULL; | |
440 | } | |
441 | ||
442 | /* | |
443 | * Note: called only from the BH handler context, | |
444 | * so we don't need to lock the hashes. | |
445 | */ | |
e3163493 PE |
446 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
447 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 448 | struct udp_table *udptable) |
1da177e4 LT |
449 | { |
450 | struct sock *sk, *sk2; | |
4bedb452 | 451 | const struct udphdr *uh = udp_hdr(skb); |
645ca708 | 452 | struct udp_hslot *hslot = &udptable->hash[udp_hashfn(net, ntohs(uh->dest))]; |
1da177e4 LT |
453 | int dif; |
454 | ||
645ca708 | 455 | spin_lock(&hslot->lock); |
88ab1932 | 456 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 457 | dif = inet6_iif(skb); |
920a4611 | 458 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
1da177e4 LT |
459 | if (!sk) { |
460 | kfree_skb(skb); | |
461 | goto out; | |
462 | } | |
463 | ||
464 | sk2 = sk; | |
88ab1932 | 465 | while ((sk2 = udp_v6_mcast_next(net, sk_nulls_next(sk2), uh->dest, daddr, |
1da177e4 LT |
466 | uh->source, saddr, dif))) { |
467 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
95766fff | 468 | if (buff) { |
d97106ea | 469 | bh_lock_sock(sk2); |
95766fff HA |
470 | if (!sock_owned_by_user(sk2)) |
471 | udpv6_queue_rcv_skb(sk2, buff); | |
472 | else | |
473 | sk_add_backlog(sk2, buff); | |
474 | bh_unlock_sock(sk2); | |
475 | } | |
1da177e4 | 476 | } |
d97106ea | 477 | bh_lock_sock(sk); |
95766fff HA |
478 | if (!sock_owned_by_user(sk)) |
479 | udpv6_queue_rcv_skb(sk, skb); | |
480 | else | |
481 | sk_add_backlog(sk, skb); | |
482 | bh_unlock_sock(sk); | |
1da177e4 | 483 | out: |
645ca708 | 484 | spin_unlock(&hslot->lock); |
ba4e58ec | 485 | return 0; |
1da177e4 LT |
486 | } |
487 | ||
759e5d00 HX |
488 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
489 | int proto) | |
ba4e58ec | 490 | { |
759e5d00 HX |
491 | int err; |
492 | ||
493 | UDP_SKB_CB(skb)->partial_cov = 0; | |
494 | UDP_SKB_CB(skb)->cscov = skb->len; | |
495 | ||
db8dac20 | 496 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
497 | err = udplite_checksum_init(skb, uh); |
498 | if (err) | |
499 | return err; | |
500 | } | |
501 | ||
ba4e58ec GR |
502 | if (uh->check == 0) { |
503 | /* RFC 2460 section 8.1 says that we SHOULD log | |
504 | this error. Well, it is reasonable. | |
505 | */ | |
506 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
507 | return 1; | |
508 | } | |
509 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 510 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 511 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
512 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
513 | ||
60476372 | 514 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
515 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
516 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 517 | skb->len, proto, 0)); |
ba4e58ec | 518 | |
759e5d00 | 519 | return 0; |
ba4e58ec GR |
520 | } |
521 | ||
645ca708 | 522 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 523 | int proto) |
1da177e4 | 524 | { |
1da177e4 | 525 | struct sock *sk; |
1ab1457c | 526 | struct udphdr *uh; |
1da177e4 LT |
527 | struct net_device *dev = skb->dev; |
528 | struct in6_addr *saddr, *daddr; | |
529 | u32 ulen = 0; | |
ef28d1a2 | 530 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
531 | |
532 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
533 | goto short_packet; | |
534 | ||
0660e03f ACM |
535 | saddr = &ipv6_hdr(skb)->saddr; |
536 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 537 | uh = udp_hdr(skb); |
1da177e4 LT |
538 | |
539 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
540 | if (ulen > skb->len) |
541 | goto short_packet; | |
1da177e4 | 542 | |
759e5d00 HX |
543 | if (proto == IPPROTO_UDP) { |
544 | /* UDP validates ulen. */ | |
1da177e4 | 545 | |
ba4e58ec GR |
546 | /* Check for jumbo payload */ |
547 | if (ulen == 0) | |
548 | ulen = skb->len; | |
1da177e4 | 549 | |
ba4e58ec GR |
550 | if (ulen < sizeof(*uh)) |
551 | goto short_packet; | |
1da177e4 | 552 | |
ba4e58ec GR |
553 | if (ulen < skb->len) { |
554 | if (pskb_trim_rcsum(skb, ulen)) | |
555 | goto short_packet; | |
0660e03f ACM |
556 | saddr = &ipv6_hdr(skb)->saddr; |
557 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 558 | uh = udp_hdr(skb); |
ba4e58ec | 559 | } |
ba4e58ec | 560 | } |
1da177e4 | 561 | |
759e5d00 HX |
562 | if (udp6_csum_init(skb, uh, proto)) |
563 | goto discard; | |
564 | ||
1ab1457c YH |
565 | /* |
566 | * Multicast receive code | |
1da177e4 | 567 | */ |
ba4e58ec | 568 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
569 | return __udp6_lib_mcast_deliver(net, skb, |
570 | saddr, daddr, udptable); | |
1da177e4 LT |
571 | |
572 | /* Unicast */ | |
573 | ||
1ab1457c | 574 | /* |
1da177e4 LT |
575 | * check socket cache ... must talk to Alan about his plans |
576 | * for sock caches... i'll skip this for now. | |
577 | */ | |
607c4aaf | 578 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
579 | |
580 | if (sk == NULL) { | |
581 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
582 | goto discard; | |
583 | ||
ba4e58ec | 584 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 585 | goto discard; |
ef28d1a2 PE |
586 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
587 | proto == IPPROTO_UDPLITE); | |
1da177e4 LT |
588 | |
589 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
590 | ||
591 | kfree_skb(skb); | |
add459aa | 592 | return 0; |
1da177e4 | 593 | } |
1ab1457c | 594 | |
1da177e4 | 595 | /* deliver */ |
1ab1457c | 596 | |
d97106ea | 597 | bh_lock_sock(sk); |
95766fff HA |
598 | if (!sock_owned_by_user(sk)) |
599 | udpv6_queue_rcv_skb(sk, skb); | |
600 | else | |
601 | sk_add_backlog(sk, skb); | |
602 | bh_unlock_sock(sk); | |
1da177e4 | 603 | sock_put(sk); |
add459aa | 604 | return 0; |
1da177e4 | 605 | |
1ab1457c | 606 | short_packet: |
ba4e58ec | 607 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 608 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 609 | ulen, skb->len); |
1da177e4 LT |
610 | |
611 | discard: | |
ef28d1a2 | 612 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 613 | kfree_skb(skb); |
add459aa | 614 | return 0; |
1da177e4 | 615 | } |
ba4e58ec | 616 | |
e5bbef20 | 617 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 618 | { |
645ca708 | 619 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
620 | } |
621 | ||
1da177e4 LT |
622 | /* |
623 | * Throw away all pending data and cancel the corking. Socket is locked. | |
624 | */ | |
625 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
626 | { | |
627 | struct udp_sock *up = udp_sk(sk); | |
628 | ||
36d926b9 DL |
629 | if (up->pending == AF_INET) |
630 | udp_flush_pending_frames(sk); | |
631 | else if (up->pending) { | |
1da177e4 LT |
632 | up->len = 0; |
633 | up->pending = 0; | |
634 | ip6_flush_pending_frames(sk); | |
1ab1457c | 635 | } |
1da177e4 LT |
636 | } |
637 | ||
638 | /* | |
639 | * Sending | |
640 | */ | |
641 | ||
4c0a6cb0 | 642 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
643 | { |
644 | struct sk_buff *skb; | |
645 | struct udphdr *uh; | |
4c0a6cb0 | 646 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
647 | struct inet_sock *inet = inet_sk(sk); |
648 | struct flowi *fl = &inet->cork.fl; | |
649 | int err = 0; | |
b2bf1e26 | 650 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 651 | __wsum csum = 0; |
1da177e4 LT |
652 | |
653 | /* Grab the skbuff where UDP header space exists. */ | |
654 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
655 | goto out; | |
656 | ||
657 | /* | |
658 | * Create a UDP header | |
659 | */ | |
4bedb452 | 660 | uh = udp_hdr(skb); |
1da177e4 LT |
661 | uh->source = fl->fl_ip_sport; |
662 | uh->dest = fl->fl_ip_dport; | |
663 | uh->len = htons(up->len); | |
664 | uh->check = 0; | |
665 | ||
b2bf1e26 | 666 | if (is_udplite) |
ba4e58ec GR |
667 | csum = udplite_csum_outgoing(sk, skb); |
668 | else | |
669 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 670 | |
ba4e58ec GR |
671 | /* add protocol-dependent pseudo-header */ |
672 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
673 | up->len, fl->proto, csum ); | |
1da177e4 | 674 | if (uh->check == 0) |
f6ab0288 | 675 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 676 | |
1da177e4 LT |
677 | err = ip6_push_pending_frames(sk); |
678 | out: | |
679 | up->len = 0; | |
680 | up->pending = 0; | |
cd562c98 | 681 | if (!err) |
235b9f7a PE |
682 | UDP6_INC_STATS_USER(sock_net(sk), |
683 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
684 | return err; |
685 | } | |
686 | ||
ba4e58ec | 687 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
688 | struct msghdr *msg, size_t len) |
689 | { | |
690 | struct ipv6_txoptions opt_space; | |
691 | struct udp_sock *up = udp_sk(sk); | |
692 | struct inet_sock *inet = inet_sk(sk); | |
693 | struct ipv6_pinfo *np = inet6_sk(sk); | |
694 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
695 | struct in6_addr *daddr, *final_p = NULL, final; | |
696 | struct ipv6_txoptions *opt = NULL; | |
697 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 698 | struct flowi fl; |
1da177e4 LT |
699 | struct dst_entry *dst; |
700 | int addr_len = msg->msg_namelen; | |
701 | int ulen = len; | |
702 | int hlimit = -1; | |
41a1f8ea | 703 | int tclass = -1; |
1da177e4 LT |
704 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
705 | int err; | |
987905de | 706 | int connected = 0; |
b2bf1e26 | 707 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 708 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
709 | |
710 | /* destination address check */ | |
711 | if (sin6) { | |
712 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
713 | return -EINVAL; | |
714 | ||
715 | switch (sin6->sin6_family) { | |
716 | case AF_INET6: | |
717 | if (addr_len < SIN6_LEN_RFC2133) | |
718 | return -EINVAL; | |
719 | daddr = &sin6->sin6_addr; | |
720 | break; | |
721 | case AF_INET: | |
722 | goto do_udp_sendmsg; | |
723 | case AF_UNSPEC: | |
724 | msg->msg_name = sin6 = NULL; | |
725 | msg->msg_namelen = addr_len = 0; | |
726 | daddr = NULL; | |
727 | break; | |
728 | default: | |
729 | return -EINVAL; | |
730 | } | |
731 | } else if (!up->pending) { | |
732 | if (sk->sk_state != TCP_ESTABLISHED) | |
733 | return -EDESTADDRREQ; | |
734 | daddr = &np->daddr; | |
1ab1457c | 735 | } else |
1da177e4 LT |
736 | daddr = NULL; |
737 | ||
738 | if (daddr) { | |
e773e4fa | 739 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
740 | struct sockaddr_in sin; |
741 | sin.sin_family = AF_INET; | |
742 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
743 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
744 | msg->msg_name = &sin; | |
745 | msg->msg_namelen = sizeof(sin); | |
746 | do_udp_sendmsg: | |
747 | if (__ipv6_only_sock(sk)) | |
748 | return -ENETUNREACH; | |
749 | return udp_sendmsg(iocb, sk, msg, len); | |
750 | } | |
751 | } | |
752 | ||
753 | if (up->pending == AF_INET) | |
754 | return udp_sendmsg(iocb, sk, msg, len); | |
755 | ||
756 | /* Rough check on arithmetic overflow, | |
b59e139b | 757 | better check is made in ip6_append_data(). |
1da177e4 LT |
758 | */ |
759 | if (len > INT_MAX - sizeof(struct udphdr)) | |
760 | return -EMSGSIZE; | |
1ab1457c | 761 | |
1da177e4 LT |
762 | if (up->pending) { |
763 | /* | |
764 | * There are pending frames. | |
765 | * The socket lock must be held while it's corked. | |
766 | */ | |
767 | lock_sock(sk); | |
768 | if (likely(up->pending)) { | |
769 | if (unlikely(up->pending != AF_INET6)) { | |
770 | release_sock(sk); | |
771 | return -EAFNOSUPPORT; | |
772 | } | |
773 | dst = NULL; | |
774 | goto do_append_data; | |
775 | } | |
776 | release_sock(sk); | |
777 | } | |
778 | ulen += sizeof(struct udphdr); | |
779 | ||
132a55f3 | 780 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
781 | |
782 | if (sin6) { | |
783 | if (sin6->sin6_port == 0) | |
784 | return -EINVAL; | |
785 | ||
132a55f3 | 786 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
787 | daddr = &sin6->sin6_addr; |
788 | ||
789 | if (np->sndflow) { | |
132a55f3 HX |
790 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
791 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
792 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
793 | if (flowlabel == NULL) |
794 | return -EINVAL; | |
795 | daddr = &flowlabel->dst; | |
796 | } | |
797 | } | |
798 | ||
799 | /* | |
800 | * Otherwise it will be difficult to maintain | |
801 | * sk->sk_dst_cache. | |
802 | */ | |
803 | if (sk->sk_state == TCP_ESTABLISHED && | |
804 | ipv6_addr_equal(daddr, &np->daddr)) | |
805 | daddr = &np->daddr; | |
806 | ||
807 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
808 | sin6->sin6_scope_id && | |
809 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 810 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
811 | } else { |
812 | if (sk->sk_state != TCP_ESTABLISHED) | |
813 | return -EDESTADDRREQ; | |
814 | ||
132a55f3 | 815 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 816 | daddr = &np->daddr; |
132a55f3 | 817 | fl.fl6_flowlabel = np->flow_label; |
987905de | 818 | connected = 1; |
1da177e4 LT |
819 | } |
820 | ||
132a55f3 HX |
821 | if (!fl.oif) |
822 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 | 823 | |
9f690db7 YH |
824 | if (!fl.oif) |
825 | fl.oif = np->sticky_pktinfo.ipi6_ifindex; | |
826 | ||
1da177e4 LT |
827 | if (msg->msg_controllen) { |
828 | opt = &opt_space; | |
829 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
830 | opt->tot_len = sizeof(*opt); | |
831 | ||
91e1908f | 832 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
833 | if (err < 0) { |
834 | fl6_sock_release(flowlabel); | |
835 | return err; | |
836 | } | |
132a55f3 HX |
837 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
838 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
839 | if (flowlabel == NULL) |
840 | return -EINVAL; | |
841 | } | |
842 | if (!(opt->opt_nflen|opt->opt_flen)) | |
843 | opt = NULL; | |
987905de | 844 | connected = 0; |
1da177e4 LT |
845 | } |
846 | if (opt == NULL) | |
847 | opt = np->opt; | |
df9890c3 YH |
848 | if (flowlabel) |
849 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
850 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 851 | |
ba4e58ec | 852 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
853 | if (!ipv6_addr_any(daddr)) |
854 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
855 | else | |
856 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
857 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
858 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
859 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 860 | |
1da177e4 LT |
861 | /* merge ip6_build_xmit from ip6_output */ |
862 | if (opt && opt->srcrt) { | |
863 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
864 | ipv6_addr_copy(&final, &fl.fl6_dst); |
865 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 866 | final_p = &final; |
987905de | 867 | connected = 0; |
1da177e4 LT |
868 | } |
869 | ||
132a55f3 HX |
870 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
871 | fl.oif = np->mcast_oif; | |
987905de MK |
872 | connected = 0; |
873 | } | |
1da177e4 | 874 | |
132a55f3 | 875 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 876 | |
132a55f3 | 877 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
878 | if (err) |
879 | goto out; | |
880 | if (final_p) | |
132a55f3 | 881 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 882 | |
52479b62 AD |
883 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
884 | if (err < 0) { | |
14e50e57 DM |
885 | if (err == -EREMOTE) |
886 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
887 | if (err < 0) | |
888 | goto out; | |
889 | } | |
1da177e4 LT |
890 | |
891 | if (hlimit < 0) { | |
132a55f3 | 892 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
893 | hlimit = np->mcast_hops; |
894 | else | |
895 | hlimit = np->hop_limit; | |
896 | if (hlimit < 0) | |
6b75d090 | 897 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
898 | } |
899 | ||
41a1f8ea YH |
900 | if (tclass < 0) { |
901 | tclass = np->tclass; | |
902 | if (tclass < 0) | |
903 | tclass = 0; | |
904 | } | |
905 | ||
1da177e4 LT |
906 | if (msg->msg_flags&MSG_CONFIRM) |
907 | goto do_confirm; | |
908 | back_from_confirm: | |
909 | ||
910 | lock_sock(sk); | |
911 | if (unlikely(up->pending)) { | |
912 | /* The socket is already corked while preparing it. */ | |
913 | /* ... which is an evident application bug. --ANK */ | |
914 | release_sock(sk); | |
915 | ||
64ce2073 | 916 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
917 | err = -EINVAL; |
918 | goto out; | |
919 | } | |
920 | ||
921 | up->pending = AF_INET6; | |
922 | ||
923 | do_append_data: | |
924 | up->len += ulen; | |
ba4e58ec GR |
925 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
926 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 927 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
928 | (struct rt6_info*)dst, |
929 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
930 | if (err) |
931 | udp_v6_flush_pending_frames(sk); | |
932 | else if (!corkreq) | |
4c0a6cb0 | 933 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
934 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
935 | up->pending = 0; | |
1da177e4 | 936 | |
a5e7c210 DM |
937 | if (dst) { |
938 | if (connected) { | |
939 | ip6_dst_store(sk, dst, | |
132a55f3 | 940 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
941 | &np->daddr : NULL, |
942 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 943 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
944 | &np->saddr : |
945 | #endif | |
946 | NULL); | |
a5e7c210 DM |
947 | } else { |
948 | dst_release(dst); | |
949 | } | |
a3c96089 | 950 | dst = NULL; |
a5e7c210 DM |
951 | } |
952 | ||
1da177e4 LT |
953 | if (err > 0) |
954 | err = np->recverr ? net_xmit_errno(err) : 0; | |
955 | release_sock(sk); | |
956 | out: | |
a3c96089 | 957 | dst_release(dst); |
1da177e4 | 958 | fl6_sock_release(flowlabel); |
cd562c98 | 959 | if (!err) |
1da177e4 | 960 | return len; |
a18135eb DM |
961 | /* |
962 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
963 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
964 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
965 | * things). We could add another new stat but at least for now that | |
966 | * seems like overkill. | |
967 | */ | |
968 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
969 | UDP6_INC_STATS_USER(sock_net(sk), |
970 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 971 | } |
1da177e4 LT |
972 | return err; |
973 | ||
974 | do_confirm: | |
975 | dst_confirm(dst); | |
976 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
977 | goto back_from_confirm; | |
978 | err = 0; | |
979 | goto out; | |
980 | } | |
981 | ||
7d06b2e0 | 982 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
983 | { |
984 | lock_sock(sk); | |
985 | udp_v6_flush_pending_frames(sk); | |
986 | release_sock(sk); | |
987 | ||
988 | inet6_destroy_sock(sk); | |
1da177e4 LT |
989 | } |
990 | ||
991 | /* | |
992 | * Socket option code for UDP | |
993 | */ | |
ba4e58ec GR |
994 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
995 | char __user *optval, int optlen) | |
3fdadf7d | 996 | { |
db8dac20 | 997 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
998 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
999 | udp_v6_push_pending_frames); | |
ba4e58ec | 1000 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1001 | } |
1002 | ||
1003 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1004 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
1005 | char __user *optval, int optlen) | |
3fdadf7d | 1006 | { |
db8dac20 | 1007 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1008 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1009 | udp_v6_push_pending_frames); | |
ba4e58ec | 1010 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1011 | } |
1012 | #endif | |
1013 | ||
ba4e58ec GR |
1014 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1015 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1016 | { |
db8dac20 | 1017 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1018 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1019 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1020 | } |
1021 | ||
1022 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1023 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1024 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1025 | { |
db8dac20 | 1026 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1027 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1028 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1029 | } |
1030 | #endif | |
1031 | ||
1da177e4 LT |
1032 | static struct inet6_protocol udpv6_protocol = { |
1033 | .handler = udpv6_rcv, | |
1034 | .err_handler = udpv6_err, | |
1035 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1036 | }; | |
1037 | ||
1038 | /* ------------------------------------------------------------------------ */ | |
1039 | #ifdef CONFIG_PROC_FS | |
1040 | ||
1041 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1042 | { | |
1043 | struct inet_sock *inet = inet_sk(sp); | |
1044 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1045 | struct in6_addr *dest, *src; | |
1046 | __u16 destp, srcp; | |
1047 | ||
1048 | dest = &np->daddr; | |
1049 | src = &np->rcv_saddr; | |
1050 | destp = ntohs(inet->dport); | |
1051 | srcp = ntohs(inet->sport); | |
1052 | seq_printf(seq, | |
1053 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
cb61cb9b | 1054 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1055 | bucket, |
1056 | src->s6_addr32[0], src->s6_addr32[1], | |
1057 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1058 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1059 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1060 | sp->sk_state, |
1da177e4 LT |
1061 | atomic_read(&sp->sk_wmem_alloc), |
1062 | atomic_read(&sp->sk_rmem_alloc), | |
1063 | 0, 0L, 0, | |
1064 | sock_i_uid(sp), 0, | |
1065 | sock_i_ino(sp), | |
cb61cb9b ED |
1066 | atomic_read(&sp->sk_refcnt), sp, |
1067 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1068 | } |
1069 | ||
ba4e58ec | 1070 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1071 | { |
1072 | if (v == SEQ_START_TOKEN) | |
1073 | seq_printf(seq, | |
1074 | " sl " | |
1075 | "local_address " | |
1076 | "remote_address " | |
1077 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1078 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1079 | else |
1080 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1081 | return 0; | |
1082 | } | |
1083 | ||
1da177e4 | 1084 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1085 | .name = "udp6", |
1086 | .family = AF_INET6, | |
645ca708 | 1087 | .udp_table = &udp_table, |
4ad96d39 DL |
1088 | .seq_fops = { |
1089 | .owner = THIS_MODULE, | |
1090 | }, | |
dda61925 DL |
1091 | .seq_ops = { |
1092 | .show = udp6_seq_show, | |
1093 | }, | |
1da177e4 LT |
1094 | }; |
1095 | ||
0c96d8c5 | 1096 | int udp6_proc_init(struct net *net) |
1da177e4 | 1097 | { |
0c96d8c5 | 1098 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1099 | } |
1100 | ||
0c96d8c5 DL |
1101 | void udp6_proc_exit(struct net *net) { |
1102 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1103 | } |
1104 | #endif /* CONFIG_PROC_FS */ | |
1105 | ||
1106 | /* ------------------------------------------------------------------------ */ | |
1107 | ||
1108 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1109 | .name = "UDPv6", |
1110 | .owner = THIS_MODULE, | |
ba4e58ec | 1111 | .close = udp_lib_close, |
543d9cfe ACM |
1112 | .connect = ip6_datagram_connect, |
1113 | .disconnect = udp_disconnect, | |
1114 | .ioctl = udp_ioctl, | |
1115 | .destroy = udpv6_destroy_sock, | |
1116 | .setsockopt = udpv6_setsockopt, | |
1117 | .getsockopt = udpv6_getsockopt, | |
1118 | .sendmsg = udpv6_sendmsg, | |
1119 | .recvmsg = udpv6_recvmsg, | |
1120 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1121 | .hash = udp_lib_hash, |
1122 | .unhash = udp_lib_unhash, | |
543d9cfe | 1123 | .get_port = udp_v6_get_port, |
95766fff HA |
1124 | .memory_allocated = &udp_memory_allocated, |
1125 | .sysctl_mem = sysctl_udp_mem, | |
1126 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1127 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1128 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1129 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1130 | .h.udp_table = &udp_table, |
3fdadf7d | 1131 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1132 | .compat_setsockopt = compat_udpv6_setsockopt, |
1133 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1134 | #endif |
1da177e4 LT |
1135 | }; |
1136 | ||
1da177e4 LT |
1137 | static struct inet_protosw udpv6_protosw = { |
1138 | .type = SOCK_DGRAM, | |
1139 | .protocol = IPPROTO_UDP, | |
1140 | .prot = &udpv6_prot, | |
1141 | .ops = &inet6_dgram_ops, | |
1142 | .capability =-1, | |
1143 | .no_check = UDP_CSUM_DEFAULT, | |
1144 | .flags = INET_PROTOSW_PERMANENT, | |
1145 | }; | |
1146 | ||
1147 | ||
7f4e4868 | 1148 | int __init udpv6_init(void) |
1da177e4 | 1149 | { |
7f4e4868 DL |
1150 | int ret; |
1151 | ||
1152 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1153 | if (ret) | |
1154 | goto out; | |
1155 | ||
1156 | ret = inet6_register_protosw(&udpv6_protosw); | |
1157 | if (ret) | |
1158 | goto out_udpv6_protocol; | |
1159 | out: | |
1160 | return ret; | |
1161 | ||
1162 | out_udpv6_protocol: | |
1163 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1164 | goto out; | |
1165 | } | |
1166 | ||
09f7709f | 1167 | void udpv6_exit(void) |
7f4e4868 DL |
1168 | { |
1169 | inet6_unregister_protosw(&udpv6_protosw); | |
1170 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1171 | } |