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 | |
6ba5a3c5 | 52 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 53 | { |
6ba5a3c5 | 54 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal); |
1da177e4 LT |
55 | } |
56 | ||
645ca708 ED |
57 | static inline int compute_score(struct sock *sk, struct net *net, |
58 | unsigned short hnum, | |
59 | struct in6_addr *saddr, __be16 sport, | |
60 | struct in6_addr *daddr, __be16 dport, | |
61 | int dif) | |
62 | { | |
63 | int score = -1; | |
64 | ||
65 | if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum && | |
66 | sk->sk_family == PF_INET6) { | |
67 | struct ipv6_pinfo *np = inet6_sk(sk); | |
68 | struct inet_sock *inet = inet_sk(sk); | |
69 | ||
70 | score = 0; | |
71 | if (inet->dport) { | |
72 | if (inet->dport != sport) | |
73 | return -1; | |
74 | score++; | |
75 | } | |
76 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
77 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
78 | return -1; | |
79 | score++; | |
80 | } | |
81 | if (!ipv6_addr_any(&np->daddr)) { | |
82 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
83 | return -1; | |
84 | score++; | |
85 | } | |
86 | if (sk->sk_bound_dev_if) { | |
87 | if (sk->sk_bound_dev_if != dif) | |
88 | return -1; | |
89 | score++; | |
90 | } | |
91 | } | |
92 | return score; | |
93 | } | |
94 | ||
fa4d3c62 PE |
95 | static struct sock *__udp6_lib_lookup(struct net *net, |
96 | struct in6_addr *saddr, __be16 sport, | |
ba4e58ec | 97 | struct in6_addr *daddr, __be16 dport, |
645ca708 | 98 | int dif, struct udp_table *udptable) |
1da177e4 | 99 | { |
271b72c7 | 100 | struct sock *sk, *result; |
96631ed1 | 101 | struct hlist_node *node, *next; |
1da177e4 | 102 | unsigned short hnum = ntohs(dport); |
645ca708 ED |
103 | unsigned int hash = udp_hashfn(net, hnum); |
104 | struct udp_hslot *hslot = &udptable->hash[hash]; | |
271b72c7 | 105 | int score, badness; |
645ca708 | 106 | |
271b72c7 ED |
107 | rcu_read_lock(); |
108 | begin: | |
109 | result = NULL; | |
110 | badness = -1; | |
96631ed1 | 111 | sk_for_each_rcu_safenext(sk, node, &hslot->head, next) { |
271b72c7 ED |
112 | /* |
113 | * lockless reader, and SLAB_DESTROY_BY_RCU items: | |
114 | * We must check this item was not moved to another chain | |
115 | */ | |
116 | if (udp_hashfn(net, sk->sk_hash) != hash) | |
117 | goto begin; | |
645ca708 ED |
118 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
119 | if (score > badness) { | |
120 | result = sk; | |
121 | badness = score; | |
1da177e4 LT |
122 | } |
123 | } | |
271b72c7 ED |
124 | if (result) { |
125 | if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) | |
126 | result = NULL; | |
127 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
128 | daddr, dport, dif) < badness)) { | |
129 | sock_put(result); | |
130 | goto begin; | |
131 | } | |
132 | } | |
133 | rcu_read_unlock(); | |
1da177e4 LT |
134 | return result; |
135 | } | |
136 | ||
607c4aaf KK |
137 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
138 | __be16 sport, __be16 dport, | |
645ca708 | 139 | struct udp_table *udptable) |
607c4aaf | 140 | { |
23542618 | 141 | struct sock *sk; |
607c4aaf KK |
142 | struct ipv6hdr *iph = ipv6_hdr(skb); |
143 | ||
23542618 KK |
144 | if (unlikely(sk = skb_steal_sock(skb))) |
145 | return sk; | |
146 | else | |
147 | return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport, | |
148 | &iph->daddr, dport, inet6_iif(skb), | |
149 | udptable); | |
607c4aaf KK |
150 | } |
151 | ||
1da177e4 LT |
152 | /* |
153 | * This should be easy, if there is something there we | |
154 | * return it, otherwise we block. | |
155 | */ | |
156 | ||
ba4e58ec | 157 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
158 | struct msghdr *msg, size_t len, |
159 | int noblock, int flags, int *addr_len) | |
160 | { | |
161 | struct ipv6_pinfo *np = inet6_sk(sk); | |
162 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 163 | struct sk_buff *skb; |
759e5d00 | 164 | unsigned int ulen, copied; |
a59322be | 165 | int peeked; |
759e5d00 HX |
166 | int err; |
167 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 168 | int is_udp4; |
1da177e4 | 169 | |
1ab1457c YH |
170 | if (addr_len) |
171 | *addr_len=sizeof(struct sockaddr_in6); | |
172 | ||
1da177e4 LT |
173 | if (flags & MSG_ERRQUEUE) |
174 | return ipv6_recv_error(sk, msg, len); | |
175 | ||
176 | try_again: | |
a59322be HX |
177 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
178 | &peeked, &err); | |
1da177e4 LT |
179 | if (!skb) |
180 | goto out; | |
181 | ||
759e5d00 HX |
182 | ulen = skb->len - sizeof(struct udphdr); |
183 | copied = len; | |
184 | if (copied > ulen) | |
185 | copied = ulen; | |
186 | else if (copied < ulen) | |
1ab1457c | 187 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 188 | |
f26ba175 WY |
189 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
190 | ||
ba4e58ec | 191 | /* |
759e5d00 HX |
192 | * If checksum is needed at all, try to do it while copying the |
193 | * data. If the data is truncated, or if we only want a partial | |
194 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 195 | */ |
ba4e58ec | 196 | |
759e5d00 HX |
197 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
198 | if (udp_lib_checksum_complete(skb)) | |
1da177e4 | 199 | goto csum_copy_err; |
ba4e58ec GR |
200 | } |
201 | ||
60476372 | 202 | if (skb_csum_unnecessary(skb)) |
ba4e58ec GR |
203 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
204 | msg->msg_iov, copied ); | |
205 | else { | |
1da177e4 LT |
206 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
207 | if (err == -EINVAL) | |
208 | goto csum_copy_err; | |
209 | } | |
210 | if (err) | |
211 | goto out_free; | |
212 | ||
f26ba175 WY |
213 | if (!peeked) { |
214 | if (is_udp4) | |
215 | UDP_INC_STATS_USER(sock_net(sk), | |
216 | UDP_MIB_INDATAGRAMS, is_udplite); | |
217 | else | |
218 | UDP6_INC_STATS_USER(sock_net(sk), | |
219 | UDP_MIB_INDATAGRAMS, is_udplite); | |
220 | } | |
cb75994e | 221 | |
1da177e4 LT |
222 | sock_recv_timestamp(msg, sk, skb); |
223 | ||
224 | /* Copy the address. */ | |
225 | if (msg->msg_name) { | |
226 | struct sockaddr_in6 *sin6; | |
1ab1457c | 227 | |
1da177e4 LT |
228 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
229 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 230 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
231 | sin6->sin6_flowinfo = 0; |
232 | sin6->sin6_scope_id = 0; | |
233 | ||
f26ba175 | 234 | if (is_udp4) |
1da177e4 | 235 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, |
eddc9ec5 | 236 | htonl(0xffff), ip_hdr(skb)->saddr); |
1da177e4 | 237 | else { |
0660e03f ACM |
238 | ipv6_addr_copy(&sin6->sin6_addr, |
239 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
240 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
241 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
242 | } | |
243 | ||
244 | } | |
f26ba175 | 245 | if (is_udp4) { |
1da177e4 LT |
246 | if (inet->cmsg_flags) |
247 | ip_cmsg_recv(msg, skb); | |
248 | } else { | |
249 | if (np->rxopt.all) | |
250 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 251 | } |
1da177e4 LT |
252 | |
253 | err = copied; | |
254 | if (flags & MSG_TRUNC) | |
759e5d00 | 255 | err = ulen; |
1da177e4 LT |
256 | |
257 | out_free: | |
95766fff | 258 | lock_sock(sk); |
1da177e4 | 259 | skb_free_datagram(sk, skb); |
95766fff | 260 | release_sock(sk); |
1da177e4 LT |
261 | out: |
262 | return err; | |
263 | ||
264 | csum_copy_err: | |
95766fff | 265 | lock_sock(sk); |
0856f939 WY |
266 | if (!skb_kill_datagram(sk, skb, flags)) { |
267 | if (is_udp4) | |
268 | UDP_INC_STATS_USER(sock_net(sk), | |
269 | UDP_MIB_INERRORS, is_udplite); | |
270 | else | |
271 | UDP6_INC_STATS_USER(sock_net(sk), | |
272 | UDP_MIB_INERRORS, is_udplite); | |
273 | } | |
95766fff | 274 | release_sock(sk); |
1da177e4 | 275 | |
7a0ff716 | 276 | if (flags & MSG_DONTWAIT) |
1da177e4 | 277 | return -EAGAIN; |
1da177e4 LT |
278 | goto try_again; |
279 | } | |
280 | ||
ba4e58ec GR |
281 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
282 | int type, int code, int offset, __be32 info, | |
645ca708 | 283 | struct udp_table *udptable) |
1da177e4 LT |
284 | { |
285 | struct ipv6_pinfo *np; | |
286 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
287 | struct in6_addr *saddr = &hdr->saddr; |
288 | struct in6_addr *daddr = &hdr->daddr; | |
289 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
290 | struct sock *sk; | |
291 | int err; | |
292 | ||
c346dca1 | 293 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 294 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
295 | if (sk == NULL) |
296 | return; | |
297 | ||
298 | np = inet6_sk(sk); | |
299 | ||
300 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
301 | goto out; | |
302 | ||
303 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
304 | goto out; | |
305 | ||
306 | if (np->recverr) | |
307 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
308 | ||
309 | sk->sk_err = err; | |
310 | sk->sk_error_report(sk); | |
311 | out: | |
312 | sock_put(sk); | |
313 | } | |
314 | ||
ba4e58ec GR |
315 | static __inline__ void udpv6_err(struct sk_buff *skb, |
316 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 317 | int code, int offset, __be32 info ) |
ba4e58ec | 318 | { |
645ca708 | 319 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
320 | } |
321 | ||
322 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 323 | { |
ba4e58ec | 324 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 325 | int rc; |
b2bf1e26 | 326 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 327 | |
ba4e58ec GR |
328 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
329 | goto drop; | |
1da177e4 | 330 | |
ba4e58ec GR |
331 | /* |
332 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
333 | */ | |
b2bf1e26 | 334 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
335 | |
336 | if (up->pcrlen == 0) { /* full coverage was set */ | |
337 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
338 | " %d while full coverage %d requested\n", | |
339 | UDP_SKB_CB(skb)->cscov, skb->len); | |
340 | goto drop; | |
341 | } | |
342 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
343 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
344 | "too small, need min %d\n", | |
345 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
346 | goto drop; | |
347 | } | |
1da177e4 LT |
348 | } |
349 | ||
1ab6eb62 HX |
350 | if (sk->sk_filter) { |
351 | if (udp_lib_checksum_complete(skb)) | |
352 | goto drop; | |
353 | } | |
ba4e58ec | 354 | |
a18135eb DM |
355 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
356 | /* Note that an ENOMEM error is charged twice */ | |
cb61cb9b | 357 | if (rc == -ENOMEM) { |
ef28d1a2 PE |
358 | UDP6_INC_STATS_BH(sock_net(sk), |
359 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
cb61cb9b ED |
360 | atomic_inc(&sk->sk_drops); |
361 | } | |
ba4e58ec | 362 | goto drop; |
1da177e4 | 363 | } |
cb75994e | 364 | |
1da177e4 | 365 | return 0; |
ba4e58ec | 366 | drop: |
ef28d1a2 | 367 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
368 | kfree_skb(skb); |
369 | return -1; | |
1da177e4 LT |
370 | } |
371 | ||
920a4611 | 372 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
373 | __be16 loc_port, struct in6_addr *loc_addr, |
374 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
375 | int dif) |
376 | { | |
377 | struct hlist_node *node; | |
378 | struct sock *s = sk; | |
379 | unsigned short num = ntohs(loc_port); | |
380 | ||
381 | sk_for_each_from(s, node) { | |
382 | struct inet_sock *inet = inet_sk(s); | |
383 | ||
920a4611 | 384 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
385 | continue; |
386 | ||
95f30b33 | 387 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
388 | struct ipv6_pinfo *np = inet6_sk(s); |
389 | if (inet->dport) { | |
390 | if (inet->dport != rmt_port) | |
391 | continue; | |
392 | } | |
393 | if (!ipv6_addr_any(&np->daddr) && | |
394 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
395 | continue; | |
396 | ||
397 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
398 | continue; | |
399 | ||
400 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
401 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
402 | continue; | |
1da177e4 | 403 | } |
add459aa | 404 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
405 | continue; |
406 | return s; | |
407 | } | |
408 | } | |
409 | return NULL; | |
410 | } | |
411 | ||
412 | /* | |
413 | * Note: called only from the BH handler context, | |
414 | * so we don't need to lock the hashes. | |
415 | */ | |
e3163493 PE |
416 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
417 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 418 | struct udp_table *udptable) |
1da177e4 LT |
419 | { |
420 | struct sock *sk, *sk2; | |
4bedb452 | 421 | const struct udphdr *uh = udp_hdr(skb); |
645ca708 | 422 | struct udp_hslot *hslot = &udptable->hash[udp_hashfn(net, ntohs(uh->dest))]; |
1da177e4 LT |
423 | int dif; |
424 | ||
645ca708 ED |
425 | spin_lock(&hslot->lock); |
426 | sk = sk_head(&hslot->head); | |
f2776ff0 | 427 | dif = inet6_iif(skb); |
920a4611 | 428 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
1da177e4 LT |
429 | if (!sk) { |
430 | kfree_skb(skb); | |
431 | goto out; | |
432 | } | |
433 | ||
434 | sk2 = sk; | |
920a4611 | 435 | while ((sk2 = udp_v6_mcast_next(net, sk_next(sk2), uh->dest, daddr, |
1da177e4 LT |
436 | uh->source, saddr, dif))) { |
437 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
95766fff | 438 | if (buff) { |
d97106ea | 439 | bh_lock_sock(sk2); |
95766fff HA |
440 | if (!sock_owned_by_user(sk2)) |
441 | udpv6_queue_rcv_skb(sk2, buff); | |
442 | else | |
443 | sk_add_backlog(sk2, buff); | |
444 | bh_unlock_sock(sk2); | |
445 | } | |
1da177e4 | 446 | } |
d97106ea | 447 | bh_lock_sock(sk); |
95766fff HA |
448 | if (!sock_owned_by_user(sk)) |
449 | udpv6_queue_rcv_skb(sk, skb); | |
450 | else | |
451 | sk_add_backlog(sk, skb); | |
452 | bh_unlock_sock(sk); | |
1da177e4 | 453 | out: |
645ca708 | 454 | spin_unlock(&hslot->lock); |
ba4e58ec | 455 | return 0; |
1da177e4 LT |
456 | } |
457 | ||
759e5d00 HX |
458 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
459 | int proto) | |
ba4e58ec | 460 | { |
759e5d00 HX |
461 | int err; |
462 | ||
463 | UDP_SKB_CB(skb)->partial_cov = 0; | |
464 | UDP_SKB_CB(skb)->cscov = skb->len; | |
465 | ||
db8dac20 | 466 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
467 | err = udplite_checksum_init(skb, uh); |
468 | if (err) | |
469 | return err; | |
470 | } | |
471 | ||
ba4e58ec GR |
472 | if (uh->check == 0) { |
473 | /* RFC 2460 section 8.1 says that we SHOULD log | |
474 | this error. Well, it is reasonable. | |
475 | */ | |
476 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
477 | return 1; | |
478 | } | |
479 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 480 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 481 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
482 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
483 | ||
60476372 | 484 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
485 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
486 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 487 | skb->len, proto, 0)); |
ba4e58ec | 488 | |
759e5d00 | 489 | return 0; |
ba4e58ec GR |
490 | } |
491 | ||
645ca708 | 492 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 493 | int proto) |
1da177e4 | 494 | { |
1da177e4 | 495 | struct sock *sk; |
1ab1457c | 496 | struct udphdr *uh; |
1da177e4 LT |
497 | struct net_device *dev = skb->dev; |
498 | struct in6_addr *saddr, *daddr; | |
499 | u32 ulen = 0; | |
ef28d1a2 | 500 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
501 | |
502 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
503 | goto short_packet; | |
504 | ||
0660e03f ACM |
505 | saddr = &ipv6_hdr(skb)->saddr; |
506 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 507 | uh = udp_hdr(skb); |
1da177e4 LT |
508 | |
509 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
510 | if (ulen > skb->len) |
511 | goto short_packet; | |
1da177e4 | 512 | |
759e5d00 HX |
513 | if (proto == IPPROTO_UDP) { |
514 | /* UDP validates ulen. */ | |
1da177e4 | 515 | |
ba4e58ec GR |
516 | /* Check for jumbo payload */ |
517 | if (ulen == 0) | |
518 | ulen = skb->len; | |
1da177e4 | 519 | |
ba4e58ec GR |
520 | if (ulen < sizeof(*uh)) |
521 | goto short_packet; | |
1da177e4 | 522 | |
ba4e58ec GR |
523 | if (ulen < skb->len) { |
524 | if (pskb_trim_rcsum(skb, ulen)) | |
525 | goto short_packet; | |
0660e03f ACM |
526 | saddr = &ipv6_hdr(skb)->saddr; |
527 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 528 | uh = udp_hdr(skb); |
ba4e58ec | 529 | } |
ba4e58ec | 530 | } |
1da177e4 | 531 | |
759e5d00 HX |
532 | if (udp6_csum_init(skb, uh, proto)) |
533 | goto discard; | |
534 | ||
1ab1457c YH |
535 | /* |
536 | * Multicast receive code | |
1da177e4 | 537 | */ |
ba4e58ec | 538 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
539 | return __udp6_lib_mcast_deliver(net, skb, |
540 | saddr, daddr, udptable); | |
1da177e4 LT |
541 | |
542 | /* Unicast */ | |
543 | ||
1ab1457c | 544 | /* |
1da177e4 LT |
545 | * check socket cache ... must talk to Alan about his plans |
546 | * for sock caches... i'll skip this for now. | |
547 | */ | |
607c4aaf | 548 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
549 | |
550 | if (sk == NULL) { | |
551 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
552 | goto discard; | |
553 | ||
ba4e58ec | 554 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 555 | goto discard; |
ef28d1a2 PE |
556 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
557 | proto == IPPROTO_UDPLITE); | |
1da177e4 LT |
558 | |
559 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
560 | ||
561 | kfree_skb(skb); | |
add459aa | 562 | return 0; |
1da177e4 | 563 | } |
1ab1457c | 564 | |
1da177e4 | 565 | /* deliver */ |
1ab1457c | 566 | |
d97106ea | 567 | bh_lock_sock(sk); |
95766fff HA |
568 | if (!sock_owned_by_user(sk)) |
569 | udpv6_queue_rcv_skb(sk, skb); | |
570 | else | |
571 | sk_add_backlog(sk, skb); | |
572 | bh_unlock_sock(sk); | |
1da177e4 | 573 | sock_put(sk); |
add459aa | 574 | return 0; |
1da177e4 | 575 | |
1ab1457c | 576 | short_packet: |
ba4e58ec | 577 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 578 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 579 | ulen, skb->len); |
1da177e4 LT |
580 | |
581 | discard: | |
ef28d1a2 | 582 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 583 | kfree_skb(skb); |
add459aa | 584 | return 0; |
1da177e4 | 585 | } |
ba4e58ec | 586 | |
e5bbef20 | 587 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 588 | { |
645ca708 | 589 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
590 | } |
591 | ||
1da177e4 LT |
592 | /* |
593 | * Throw away all pending data and cancel the corking. Socket is locked. | |
594 | */ | |
595 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
596 | { | |
597 | struct udp_sock *up = udp_sk(sk); | |
598 | ||
36d926b9 DL |
599 | if (up->pending == AF_INET) |
600 | udp_flush_pending_frames(sk); | |
601 | else if (up->pending) { | |
1da177e4 LT |
602 | up->len = 0; |
603 | up->pending = 0; | |
604 | ip6_flush_pending_frames(sk); | |
1ab1457c | 605 | } |
1da177e4 LT |
606 | } |
607 | ||
608 | /* | |
609 | * Sending | |
610 | */ | |
611 | ||
4c0a6cb0 | 612 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
613 | { |
614 | struct sk_buff *skb; | |
615 | struct udphdr *uh; | |
4c0a6cb0 | 616 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
617 | struct inet_sock *inet = inet_sk(sk); |
618 | struct flowi *fl = &inet->cork.fl; | |
619 | int err = 0; | |
b2bf1e26 | 620 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 621 | __wsum csum = 0; |
1da177e4 LT |
622 | |
623 | /* Grab the skbuff where UDP header space exists. */ | |
624 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
625 | goto out; | |
626 | ||
627 | /* | |
628 | * Create a UDP header | |
629 | */ | |
4bedb452 | 630 | uh = udp_hdr(skb); |
1da177e4 LT |
631 | uh->source = fl->fl_ip_sport; |
632 | uh->dest = fl->fl_ip_dport; | |
633 | uh->len = htons(up->len); | |
634 | uh->check = 0; | |
635 | ||
b2bf1e26 | 636 | if (is_udplite) |
ba4e58ec GR |
637 | csum = udplite_csum_outgoing(sk, skb); |
638 | else | |
639 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 640 | |
ba4e58ec GR |
641 | /* add protocol-dependent pseudo-header */ |
642 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
643 | up->len, fl->proto, csum ); | |
1da177e4 | 644 | if (uh->check == 0) |
f6ab0288 | 645 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 646 | |
1da177e4 LT |
647 | err = ip6_push_pending_frames(sk); |
648 | out: | |
649 | up->len = 0; | |
650 | up->pending = 0; | |
cd562c98 | 651 | if (!err) |
235b9f7a PE |
652 | UDP6_INC_STATS_USER(sock_net(sk), |
653 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
654 | return err; |
655 | } | |
656 | ||
ba4e58ec | 657 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
658 | struct msghdr *msg, size_t len) |
659 | { | |
660 | struct ipv6_txoptions opt_space; | |
661 | struct udp_sock *up = udp_sk(sk); | |
662 | struct inet_sock *inet = inet_sk(sk); | |
663 | struct ipv6_pinfo *np = inet6_sk(sk); | |
664 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
665 | struct in6_addr *daddr, *final_p = NULL, final; | |
666 | struct ipv6_txoptions *opt = NULL; | |
667 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 668 | struct flowi fl; |
1da177e4 LT |
669 | struct dst_entry *dst; |
670 | int addr_len = msg->msg_namelen; | |
671 | int ulen = len; | |
672 | int hlimit = -1; | |
41a1f8ea | 673 | int tclass = -1; |
1da177e4 LT |
674 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
675 | int err; | |
987905de | 676 | int connected = 0; |
b2bf1e26 | 677 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 678 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
679 | |
680 | /* destination address check */ | |
681 | if (sin6) { | |
682 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
683 | return -EINVAL; | |
684 | ||
685 | switch (sin6->sin6_family) { | |
686 | case AF_INET6: | |
687 | if (addr_len < SIN6_LEN_RFC2133) | |
688 | return -EINVAL; | |
689 | daddr = &sin6->sin6_addr; | |
690 | break; | |
691 | case AF_INET: | |
692 | goto do_udp_sendmsg; | |
693 | case AF_UNSPEC: | |
694 | msg->msg_name = sin6 = NULL; | |
695 | msg->msg_namelen = addr_len = 0; | |
696 | daddr = NULL; | |
697 | break; | |
698 | default: | |
699 | return -EINVAL; | |
700 | } | |
701 | } else if (!up->pending) { | |
702 | if (sk->sk_state != TCP_ESTABLISHED) | |
703 | return -EDESTADDRREQ; | |
704 | daddr = &np->daddr; | |
1ab1457c | 705 | } else |
1da177e4 LT |
706 | daddr = NULL; |
707 | ||
708 | if (daddr) { | |
e773e4fa | 709 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
710 | struct sockaddr_in sin; |
711 | sin.sin_family = AF_INET; | |
712 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
713 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
714 | msg->msg_name = &sin; | |
715 | msg->msg_namelen = sizeof(sin); | |
716 | do_udp_sendmsg: | |
717 | if (__ipv6_only_sock(sk)) | |
718 | return -ENETUNREACH; | |
719 | return udp_sendmsg(iocb, sk, msg, len); | |
720 | } | |
721 | } | |
722 | ||
723 | if (up->pending == AF_INET) | |
724 | return udp_sendmsg(iocb, sk, msg, len); | |
725 | ||
726 | /* Rough check on arithmetic overflow, | |
b59e139b | 727 | better check is made in ip6_append_data(). |
1da177e4 LT |
728 | */ |
729 | if (len > INT_MAX - sizeof(struct udphdr)) | |
730 | return -EMSGSIZE; | |
1ab1457c | 731 | |
1da177e4 LT |
732 | if (up->pending) { |
733 | /* | |
734 | * There are pending frames. | |
735 | * The socket lock must be held while it's corked. | |
736 | */ | |
737 | lock_sock(sk); | |
738 | if (likely(up->pending)) { | |
739 | if (unlikely(up->pending != AF_INET6)) { | |
740 | release_sock(sk); | |
741 | return -EAFNOSUPPORT; | |
742 | } | |
743 | dst = NULL; | |
744 | goto do_append_data; | |
745 | } | |
746 | release_sock(sk); | |
747 | } | |
748 | ulen += sizeof(struct udphdr); | |
749 | ||
132a55f3 | 750 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
751 | |
752 | if (sin6) { | |
753 | if (sin6->sin6_port == 0) | |
754 | return -EINVAL; | |
755 | ||
132a55f3 | 756 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
757 | daddr = &sin6->sin6_addr; |
758 | ||
759 | if (np->sndflow) { | |
132a55f3 HX |
760 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
761 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
762 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
763 | if (flowlabel == NULL) |
764 | return -EINVAL; | |
765 | daddr = &flowlabel->dst; | |
766 | } | |
767 | } | |
768 | ||
769 | /* | |
770 | * Otherwise it will be difficult to maintain | |
771 | * sk->sk_dst_cache. | |
772 | */ | |
773 | if (sk->sk_state == TCP_ESTABLISHED && | |
774 | ipv6_addr_equal(daddr, &np->daddr)) | |
775 | daddr = &np->daddr; | |
776 | ||
777 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
778 | sin6->sin6_scope_id && | |
779 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 780 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
781 | } else { |
782 | if (sk->sk_state != TCP_ESTABLISHED) | |
783 | return -EDESTADDRREQ; | |
784 | ||
132a55f3 | 785 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 786 | daddr = &np->daddr; |
132a55f3 | 787 | fl.fl6_flowlabel = np->flow_label; |
987905de | 788 | connected = 1; |
1da177e4 LT |
789 | } |
790 | ||
132a55f3 HX |
791 | if (!fl.oif) |
792 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
793 | |
794 | if (msg->msg_controllen) { | |
795 | opt = &opt_space; | |
796 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
797 | opt->tot_len = sizeof(*opt); | |
798 | ||
91e1908f | 799 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
800 | if (err < 0) { |
801 | fl6_sock_release(flowlabel); | |
802 | return err; | |
803 | } | |
132a55f3 HX |
804 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
805 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
806 | if (flowlabel == NULL) |
807 | return -EINVAL; | |
808 | } | |
809 | if (!(opt->opt_nflen|opt->opt_flen)) | |
810 | opt = NULL; | |
987905de | 811 | connected = 0; |
1da177e4 LT |
812 | } |
813 | if (opt == NULL) | |
814 | opt = np->opt; | |
df9890c3 YH |
815 | if (flowlabel) |
816 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
817 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 818 | |
ba4e58ec | 819 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
820 | if (!ipv6_addr_any(daddr)) |
821 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
822 | else | |
823 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
824 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
825 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
826 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 827 | |
1da177e4 LT |
828 | /* merge ip6_build_xmit from ip6_output */ |
829 | if (opt && opt->srcrt) { | |
830 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
831 | ipv6_addr_copy(&final, &fl.fl6_dst); |
832 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 833 | final_p = &final; |
987905de | 834 | connected = 0; |
1da177e4 LT |
835 | } |
836 | ||
132a55f3 HX |
837 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
838 | fl.oif = np->mcast_oif; | |
987905de MK |
839 | connected = 0; |
840 | } | |
1da177e4 | 841 | |
132a55f3 | 842 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 843 | |
132a55f3 | 844 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
845 | if (err) |
846 | goto out; | |
847 | if (final_p) | |
132a55f3 | 848 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 849 | |
bb72845e | 850 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
851 | if (err == -EREMOTE) |
852 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
853 | if (err < 0) | |
854 | goto out; | |
855 | } | |
1da177e4 LT |
856 | |
857 | if (hlimit < 0) { | |
132a55f3 | 858 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
859 | hlimit = np->mcast_hops; |
860 | else | |
861 | hlimit = np->hop_limit; | |
862 | if (hlimit < 0) | |
6b75d090 | 863 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
864 | } |
865 | ||
41a1f8ea YH |
866 | if (tclass < 0) { |
867 | tclass = np->tclass; | |
868 | if (tclass < 0) | |
869 | tclass = 0; | |
870 | } | |
871 | ||
1da177e4 LT |
872 | if (msg->msg_flags&MSG_CONFIRM) |
873 | goto do_confirm; | |
874 | back_from_confirm: | |
875 | ||
876 | lock_sock(sk); | |
877 | if (unlikely(up->pending)) { | |
878 | /* The socket is already corked while preparing it. */ | |
879 | /* ... which is an evident application bug. --ANK */ | |
880 | release_sock(sk); | |
881 | ||
64ce2073 | 882 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
883 | err = -EINVAL; |
884 | goto out; | |
885 | } | |
886 | ||
887 | up->pending = AF_INET6; | |
888 | ||
889 | do_append_data: | |
890 | up->len += ulen; | |
ba4e58ec GR |
891 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
892 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 893 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
894 | (struct rt6_info*)dst, |
895 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
896 | if (err) |
897 | udp_v6_flush_pending_frames(sk); | |
898 | else if (!corkreq) | |
4c0a6cb0 | 899 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
900 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
901 | up->pending = 0; | |
1da177e4 | 902 | |
a5e7c210 DM |
903 | if (dst) { |
904 | if (connected) { | |
905 | ip6_dst_store(sk, dst, | |
132a55f3 | 906 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
907 | &np->daddr : NULL, |
908 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 909 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
910 | &np->saddr : |
911 | #endif | |
912 | NULL); | |
a5e7c210 DM |
913 | } else { |
914 | dst_release(dst); | |
915 | } | |
a3c96089 | 916 | dst = NULL; |
a5e7c210 DM |
917 | } |
918 | ||
1da177e4 LT |
919 | if (err > 0) |
920 | err = np->recverr ? net_xmit_errno(err) : 0; | |
921 | release_sock(sk); | |
922 | out: | |
a3c96089 | 923 | dst_release(dst); |
1da177e4 | 924 | fl6_sock_release(flowlabel); |
cd562c98 | 925 | if (!err) |
1da177e4 | 926 | return len; |
a18135eb DM |
927 | /* |
928 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
929 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
930 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
931 | * things). We could add another new stat but at least for now that | |
932 | * seems like overkill. | |
933 | */ | |
934 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
935 | UDP6_INC_STATS_USER(sock_net(sk), |
936 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 937 | } |
1da177e4 LT |
938 | return err; |
939 | ||
940 | do_confirm: | |
941 | dst_confirm(dst); | |
942 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
943 | goto back_from_confirm; | |
944 | err = 0; | |
945 | goto out; | |
946 | } | |
947 | ||
7d06b2e0 | 948 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
949 | { |
950 | lock_sock(sk); | |
951 | udp_v6_flush_pending_frames(sk); | |
952 | release_sock(sk); | |
953 | ||
954 | inet6_destroy_sock(sk); | |
1da177e4 LT |
955 | } |
956 | ||
957 | /* | |
958 | * Socket option code for UDP | |
959 | */ | |
ba4e58ec GR |
960 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
961 | char __user *optval, int optlen) | |
3fdadf7d | 962 | { |
db8dac20 | 963 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
964 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
965 | udp_v6_push_pending_frames); | |
ba4e58ec | 966 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
967 | } |
968 | ||
969 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
970 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
971 | char __user *optval, int optlen) | |
3fdadf7d | 972 | { |
db8dac20 | 973 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
974 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
975 | udp_v6_push_pending_frames); | |
ba4e58ec | 976 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
977 | } |
978 | #endif | |
979 | ||
ba4e58ec GR |
980 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
981 | char __user *optval, int __user *optlen) | |
3fdadf7d | 982 | { |
db8dac20 | 983 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 984 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 985 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
986 | } |
987 | ||
988 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
989 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
990 | char __user *optval, int __user *optlen) | |
3fdadf7d | 991 | { |
db8dac20 | 992 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 993 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 994 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
995 | } |
996 | #endif | |
997 | ||
1da177e4 LT |
998 | static struct inet6_protocol udpv6_protocol = { |
999 | .handler = udpv6_rcv, | |
1000 | .err_handler = udpv6_err, | |
1001 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1002 | }; | |
1003 | ||
1004 | /* ------------------------------------------------------------------------ */ | |
1005 | #ifdef CONFIG_PROC_FS | |
1006 | ||
1007 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1008 | { | |
1009 | struct inet_sock *inet = inet_sk(sp); | |
1010 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1011 | struct in6_addr *dest, *src; | |
1012 | __u16 destp, srcp; | |
1013 | ||
1014 | dest = &np->daddr; | |
1015 | src = &np->rcv_saddr; | |
1016 | destp = ntohs(inet->dport); | |
1017 | srcp = ntohs(inet->sport); | |
1018 | seq_printf(seq, | |
1019 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
cb61cb9b | 1020 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1021 | bucket, |
1022 | src->s6_addr32[0], src->s6_addr32[1], | |
1023 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1024 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1025 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1026 | sp->sk_state, |
1da177e4 LT |
1027 | atomic_read(&sp->sk_wmem_alloc), |
1028 | atomic_read(&sp->sk_rmem_alloc), | |
1029 | 0, 0L, 0, | |
1030 | sock_i_uid(sp), 0, | |
1031 | sock_i_ino(sp), | |
cb61cb9b ED |
1032 | atomic_read(&sp->sk_refcnt), sp, |
1033 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1034 | } |
1035 | ||
ba4e58ec | 1036 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1037 | { |
1038 | if (v == SEQ_START_TOKEN) | |
1039 | seq_printf(seq, | |
1040 | " sl " | |
1041 | "local_address " | |
1042 | "remote_address " | |
1043 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1044 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1045 | else |
1046 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1da177e4 | 1050 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1051 | .name = "udp6", |
1052 | .family = AF_INET6, | |
645ca708 | 1053 | .udp_table = &udp_table, |
4ad96d39 DL |
1054 | .seq_fops = { |
1055 | .owner = THIS_MODULE, | |
1056 | }, | |
dda61925 DL |
1057 | .seq_ops = { |
1058 | .show = udp6_seq_show, | |
1059 | }, | |
1da177e4 LT |
1060 | }; |
1061 | ||
0c96d8c5 | 1062 | int udp6_proc_init(struct net *net) |
1da177e4 | 1063 | { |
0c96d8c5 | 1064 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1065 | } |
1066 | ||
0c96d8c5 DL |
1067 | void udp6_proc_exit(struct net *net) { |
1068 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1069 | } |
1070 | #endif /* CONFIG_PROC_FS */ | |
1071 | ||
1072 | /* ------------------------------------------------------------------------ */ | |
1073 | ||
1074 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1075 | .name = "UDPv6", |
1076 | .owner = THIS_MODULE, | |
ba4e58ec | 1077 | .close = udp_lib_close, |
543d9cfe ACM |
1078 | .connect = ip6_datagram_connect, |
1079 | .disconnect = udp_disconnect, | |
1080 | .ioctl = udp_ioctl, | |
1081 | .destroy = udpv6_destroy_sock, | |
1082 | .setsockopt = udpv6_setsockopt, | |
1083 | .getsockopt = udpv6_getsockopt, | |
1084 | .sendmsg = udpv6_sendmsg, | |
1085 | .recvmsg = udpv6_recvmsg, | |
1086 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1087 | .hash = udp_lib_hash, |
1088 | .unhash = udp_lib_unhash, | |
543d9cfe | 1089 | .get_port = udp_v6_get_port, |
95766fff HA |
1090 | .memory_allocated = &udp_memory_allocated, |
1091 | .sysctl_mem = sysctl_udp_mem, | |
1092 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1093 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1094 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1095 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1096 | .h.udp_table = &udp_table, |
3fdadf7d | 1097 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1098 | .compat_setsockopt = compat_udpv6_setsockopt, |
1099 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1100 | #endif |
1da177e4 LT |
1101 | }; |
1102 | ||
1da177e4 LT |
1103 | static struct inet_protosw udpv6_protosw = { |
1104 | .type = SOCK_DGRAM, | |
1105 | .protocol = IPPROTO_UDP, | |
1106 | .prot = &udpv6_prot, | |
1107 | .ops = &inet6_dgram_ops, | |
1108 | .capability =-1, | |
1109 | .no_check = UDP_CSUM_DEFAULT, | |
1110 | .flags = INET_PROTOSW_PERMANENT, | |
1111 | }; | |
1112 | ||
1113 | ||
7f4e4868 | 1114 | int __init udpv6_init(void) |
1da177e4 | 1115 | { |
7f4e4868 DL |
1116 | int ret; |
1117 | ||
1118 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1119 | if (ret) | |
1120 | goto out; | |
1121 | ||
1122 | ret = inet6_register_protosw(&udpv6_protosw); | |
1123 | if (ret) | |
1124 | goto out_udpv6_protocol; | |
1125 | out: | |
1126 | return ret; | |
1127 | ||
1128 | out_udpv6_protocol: | |
1129 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1130 | goto out; | |
1131 | } | |
1132 | ||
09f7709f | 1133 | void udpv6_exit(void) |
7f4e4868 DL |
1134 | { |
1135 | inet6_unregister_protosw(&udpv6_protosw); | |
1136 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1137 | } |