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 | ||
fa4d3c62 PE |
57 | static struct sock *__udp6_lib_lookup(struct net *net, |
58 | struct in6_addr *saddr, __be16 sport, | |
ba4e58ec GR |
59 | struct in6_addr *daddr, __be16 dport, |
60 | int dif, struct hlist_head udptable[]) | |
1da177e4 LT |
61 | { |
62 | struct sock *sk, *result = NULL; | |
63 | struct hlist_node *node; | |
64 | unsigned short hnum = ntohs(dport); | |
65 | int badness = -1; | |
66 | ||
1ab1457c | 67 | read_lock(&udp_hash_lock); |
19c7578f | 68 | sk_for_each(sk, node, &udptable[udp_hashfn(net, hnum)]) { |
1da177e4 LT |
69 | struct inet_sock *inet = inet_sk(sk); |
70 | ||
878628fb | 71 | if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum && |
fa4d3c62 | 72 | sk->sk_family == PF_INET6) { |
1da177e4 LT |
73 | struct ipv6_pinfo *np = inet6_sk(sk); |
74 | int score = 0; | |
75 | if (inet->dport) { | |
76 | if (inet->dport != sport) | |
77 | continue; | |
78 | score++; | |
79 | } | |
80 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
81 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
82 | continue; | |
83 | score++; | |
84 | } | |
85 | if (!ipv6_addr_any(&np->daddr)) { | |
86 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
87 | continue; | |
88 | score++; | |
89 | } | |
90 | if (sk->sk_bound_dev_if) { | |
91 | if (sk->sk_bound_dev_if != dif) | |
92 | continue; | |
93 | score++; | |
94 | } | |
add459aa | 95 | if (score == 4) { |
1da177e4 LT |
96 | result = sk; |
97 | break; | |
add459aa | 98 | } else if (score > badness) { |
1da177e4 LT |
99 | result = sk; |
100 | badness = score; | |
101 | } | |
102 | } | |
103 | } | |
104 | if (result) | |
105 | sock_hold(result); | |
1ab1457c | 106 | read_unlock(&udp_hash_lock); |
1da177e4 LT |
107 | return result; |
108 | } | |
109 | ||
607c4aaf KK |
110 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
111 | __be16 sport, __be16 dport, | |
112 | struct hlist_head udptable[]) | |
113 | { | |
23542618 | 114 | struct sock *sk; |
607c4aaf KK |
115 | struct ipv6hdr *iph = ipv6_hdr(skb); |
116 | ||
23542618 KK |
117 | if (unlikely(sk = skb_steal_sock(skb))) |
118 | return sk; | |
119 | else | |
120 | return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport, | |
121 | &iph->daddr, dport, inet6_iif(skb), | |
122 | udptable); | |
607c4aaf KK |
123 | } |
124 | ||
1da177e4 LT |
125 | /* |
126 | * This should be easy, if there is something there we | |
127 | * return it, otherwise we block. | |
128 | */ | |
129 | ||
ba4e58ec | 130 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
131 | struct msghdr *msg, size_t len, |
132 | int noblock, int flags, int *addr_len) | |
133 | { | |
134 | struct ipv6_pinfo *np = inet6_sk(sk); | |
135 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 136 | struct sk_buff *skb; |
759e5d00 | 137 | unsigned int ulen, copied; |
a59322be | 138 | int peeked; |
759e5d00 HX |
139 | int err; |
140 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 141 | int is_udp4; |
1da177e4 | 142 | |
1ab1457c YH |
143 | if (addr_len) |
144 | *addr_len=sizeof(struct sockaddr_in6); | |
145 | ||
1da177e4 LT |
146 | if (flags & MSG_ERRQUEUE) |
147 | return ipv6_recv_error(sk, msg, len); | |
148 | ||
149 | try_again: | |
a59322be HX |
150 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
151 | &peeked, &err); | |
1da177e4 LT |
152 | if (!skb) |
153 | goto out; | |
154 | ||
759e5d00 HX |
155 | ulen = skb->len - sizeof(struct udphdr); |
156 | copied = len; | |
157 | if (copied > ulen) | |
158 | copied = ulen; | |
159 | else if (copied < ulen) | |
1ab1457c | 160 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 161 | |
f26ba175 WY |
162 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
163 | ||
ba4e58ec | 164 | /* |
759e5d00 HX |
165 | * If checksum is needed at all, try to do it while copying the |
166 | * data. If the data is truncated, or if we only want a partial | |
167 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 168 | */ |
ba4e58ec | 169 | |
759e5d00 HX |
170 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
171 | if (udp_lib_checksum_complete(skb)) | |
1da177e4 | 172 | goto csum_copy_err; |
ba4e58ec GR |
173 | } |
174 | ||
60476372 | 175 | if (skb_csum_unnecessary(skb)) |
ba4e58ec GR |
176 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
177 | msg->msg_iov, copied ); | |
178 | else { | |
1da177e4 LT |
179 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
180 | if (err == -EINVAL) | |
181 | goto csum_copy_err; | |
182 | } | |
183 | if (err) | |
184 | goto out_free; | |
185 | ||
f26ba175 WY |
186 | if (!peeked) { |
187 | if (is_udp4) | |
188 | UDP_INC_STATS_USER(sock_net(sk), | |
189 | UDP_MIB_INDATAGRAMS, is_udplite); | |
190 | else | |
191 | UDP6_INC_STATS_USER(sock_net(sk), | |
192 | UDP_MIB_INDATAGRAMS, is_udplite); | |
193 | } | |
cb75994e | 194 | |
1da177e4 LT |
195 | sock_recv_timestamp(msg, sk, skb); |
196 | ||
197 | /* Copy the address. */ | |
198 | if (msg->msg_name) { | |
199 | struct sockaddr_in6 *sin6; | |
1ab1457c | 200 | |
1da177e4 LT |
201 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
202 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 203 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
204 | sin6->sin6_flowinfo = 0; |
205 | sin6->sin6_scope_id = 0; | |
206 | ||
f26ba175 | 207 | if (is_udp4) |
1da177e4 | 208 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, |
eddc9ec5 | 209 | htonl(0xffff), ip_hdr(skb)->saddr); |
1da177e4 | 210 | else { |
0660e03f ACM |
211 | ipv6_addr_copy(&sin6->sin6_addr, |
212 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
213 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
214 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
215 | } | |
216 | ||
217 | } | |
f26ba175 | 218 | if (is_udp4) { |
1da177e4 LT |
219 | if (inet->cmsg_flags) |
220 | ip_cmsg_recv(msg, skb); | |
221 | } else { | |
222 | if (np->rxopt.all) | |
223 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 224 | } |
1da177e4 LT |
225 | |
226 | err = copied; | |
227 | if (flags & MSG_TRUNC) | |
759e5d00 | 228 | err = ulen; |
1da177e4 LT |
229 | |
230 | out_free: | |
95766fff | 231 | lock_sock(sk); |
1da177e4 | 232 | skb_free_datagram(sk, skb); |
95766fff | 233 | release_sock(sk); |
1da177e4 LT |
234 | out: |
235 | return err; | |
236 | ||
237 | csum_copy_err: | |
95766fff | 238 | lock_sock(sk); |
27ab2568 | 239 | if (!skb_kill_datagram(sk, skb, flags)) |
235b9f7a | 240 | UDP6_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
95766fff | 241 | release_sock(sk); |
1da177e4 | 242 | |
7a0ff716 | 243 | if (flags & MSG_DONTWAIT) |
1da177e4 | 244 | return -EAGAIN; |
1da177e4 LT |
245 | goto try_again; |
246 | } | |
247 | ||
ba4e58ec GR |
248 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
249 | int type, int code, int offset, __be32 info, | |
250 | struct hlist_head udptable[] ) | |
1da177e4 LT |
251 | { |
252 | struct ipv6_pinfo *np; | |
253 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
254 | struct in6_addr *saddr = &hdr->saddr; |
255 | struct in6_addr *daddr = &hdr->daddr; | |
256 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
257 | struct sock *sk; | |
258 | int err; | |
259 | ||
c346dca1 | 260 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 261 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
262 | if (sk == NULL) |
263 | return; | |
264 | ||
265 | np = inet6_sk(sk); | |
266 | ||
267 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
268 | goto out; | |
269 | ||
270 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
271 | goto out; | |
272 | ||
273 | if (np->recverr) | |
274 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
275 | ||
276 | sk->sk_err = err; | |
277 | sk->sk_error_report(sk); | |
278 | out: | |
279 | sock_put(sk); | |
280 | } | |
281 | ||
ba4e58ec GR |
282 | static __inline__ void udpv6_err(struct sk_buff *skb, |
283 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 284 | int code, int offset, __be32 info ) |
ba4e58ec | 285 | { |
77d0d350 | 286 | __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash); |
ba4e58ec GR |
287 | } |
288 | ||
289 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 290 | { |
ba4e58ec | 291 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 292 | int rc; |
b2bf1e26 | 293 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 294 | |
ba4e58ec GR |
295 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
296 | goto drop; | |
1da177e4 | 297 | |
ba4e58ec GR |
298 | /* |
299 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
300 | */ | |
b2bf1e26 | 301 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
302 | |
303 | if (up->pcrlen == 0) { /* full coverage was set */ | |
304 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
305 | " %d while full coverage %d requested\n", | |
306 | UDP_SKB_CB(skb)->cscov, skb->len); | |
307 | goto drop; | |
308 | } | |
309 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
310 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
311 | "too small, need min %d\n", | |
312 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
313 | goto drop; | |
314 | } | |
1da177e4 LT |
315 | } |
316 | ||
1ab6eb62 HX |
317 | if (sk->sk_filter) { |
318 | if (udp_lib_checksum_complete(skb)) | |
319 | goto drop; | |
320 | } | |
ba4e58ec | 321 | |
a18135eb DM |
322 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
323 | /* Note that an ENOMEM error is charged twice */ | |
cb61cb9b | 324 | if (rc == -ENOMEM) { |
ef28d1a2 PE |
325 | UDP6_INC_STATS_BH(sock_net(sk), |
326 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
cb61cb9b ED |
327 | atomic_inc(&sk->sk_drops); |
328 | } | |
ba4e58ec | 329 | goto drop; |
1da177e4 | 330 | } |
cb75994e | 331 | |
1da177e4 | 332 | return 0; |
ba4e58ec | 333 | drop: |
ef28d1a2 | 334 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
335 | kfree_skb(skb); |
336 | return -1; | |
1da177e4 LT |
337 | } |
338 | ||
920a4611 | 339 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
340 | __be16 loc_port, struct in6_addr *loc_addr, |
341 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
342 | int dif) |
343 | { | |
344 | struct hlist_node *node; | |
345 | struct sock *s = sk; | |
346 | unsigned short num = ntohs(loc_port); | |
347 | ||
348 | sk_for_each_from(s, node) { | |
349 | struct inet_sock *inet = inet_sk(s); | |
350 | ||
920a4611 | 351 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
352 | continue; |
353 | ||
95f30b33 | 354 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
355 | struct ipv6_pinfo *np = inet6_sk(s); |
356 | if (inet->dport) { | |
357 | if (inet->dport != rmt_port) | |
358 | continue; | |
359 | } | |
360 | if (!ipv6_addr_any(&np->daddr) && | |
361 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
362 | continue; | |
363 | ||
364 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
365 | continue; | |
366 | ||
367 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
368 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
369 | continue; | |
1da177e4 | 370 | } |
add459aa | 371 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
372 | continue; |
373 | return s; | |
374 | } | |
375 | } | |
376 | return NULL; | |
377 | } | |
378 | ||
379 | /* | |
380 | * Note: called only from the BH handler context, | |
381 | * so we don't need to lock the hashes. | |
382 | */ | |
e3163493 PE |
383 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
384 | struct in6_addr *saddr, struct in6_addr *daddr, | |
385 | struct hlist_head udptable[]) | |
1da177e4 LT |
386 | { |
387 | struct sock *sk, *sk2; | |
4bedb452 | 388 | const struct udphdr *uh = udp_hdr(skb); |
1da177e4 LT |
389 | int dif; |
390 | ||
391 | read_lock(&udp_hash_lock); | |
19c7578f | 392 | sk = sk_head(&udptable[udp_hashfn(net, ntohs(uh->dest))]); |
f2776ff0 | 393 | dif = inet6_iif(skb); |
920a4611 | 394 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
1da177e4 LT |
395 | if (!sk) { |
396 | kfree_skb(skb); | |
397 | goto out; | |
398 | } | |
399 | ||
400 | sk2 = sk; | |
920a4611 | 401 | while ((sk2 = udp_v6_mcast_next(net, sk_next(sk2), uh->dest, daddr, |
1da177e4 LT |
402 | uh->source, saddr, dif))) { |
403 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
95766fff | 404 | if (buff) { |
d97106ea | 405 | bh_lock_sock(sk2); |
95766fff HA |
406 | if (!sock_owned_by_user(sk2)) |
407 | udpv6_queue_rcv_skb(sk2, buff); | |
408 | else | |
409 | sk_add_backlog(sk2, buff); | |
410 | bh_unlock_sock(sk2); | |
411 | } | |
1da177e4 | 412 | } |
d97106ea | 413 | bh_lock_sock(sk); |
95766fff HA |
414 | if (!sock_owned_by_user(sk)) |
415 | udpv6_queue_rcv_skb(sk, skb); | |
416 | else | |
417 | sk_add_backlog(sk, skb); | |
418 | bh_unlock_sock(sk); | |
1da177e4 LT |
419 | out: |
420 | read_unlock(&udp_hash_lock); | |
ba4e58ec | 421 | return 0; |
1da177e4 LT |
422 | } |
423 | ||
759e5d00 HX |
424 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
425 | int proto) | |
ba4e58ec | 426 | { |
759e5d00 HX |
427 | int err; |
428 | ||
429 | UDP_SKB_CB(skb)->partial_cov = 0; | |
430 | UDP_SKB_CB(skb)->cscov = skb->len; | |
431 | ||
db8dac20 | 432 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
433 | err = udplite_checksum_init(skb, uh); |
434 | if (err) | |
435 | return err; | |
436 | } | |
437 | ||
ba4e58ec GR |
438 | if (uh->check == 0) { |
439 | /* RFC 2460 section 8.1 says that we SHOULD log | |
440 | this error. Well, it is reasonable. | |
441 | */ | |
442 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
443 | return 1; | |
444 | } | |
445 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 446 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 447 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
448 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
449 | ||
60476372 | 450 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
451 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
452 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 453 | skb->len, proto, 0)); |
ba4e58ec | 454 | |
759e5d00 | 455 | return 0; |
ba4e58ec GR |
456 | } |
457 | ||
e5bbef20 | 458 | int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[], |
759e5d00 | 459 | int proto) |
1da177e4 | 460 | { |
1da177e4 | 461 | struct sock *sk; |
1ab1457c | 462 | struct udphdr *uh; |
1da177e4 LT |
463 | struct net_device *dev = skb->dev; |
464 | struct in6_addr *saddr, *daddr; | |
465 | u32 ulen = 0; | |
ef28d1a2 | 466 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
467 | |
468 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
469 | goto short_packet; | |
470 | ||
0660e03f ACM |
471 | saddr = &ipv6_hdr(skb)->saddr; |
472 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 473 | uh = udp_hdr(skb); |
1da177e4 LT |
474 | |
475 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
476 | if (ulen > skb->len) |
477 | goto short_packet; | |
1da177e4 | 478 | |
759e5d00 HX |
479 | if (proto == IPPROTO_UDP) { |
480 | /* UDP validates ulen. */ | |
1da177e4 | 481 | |
ba4e58ec GR |
482 | /* Check for jumbo payload */ |
483 | if (ulen == 0) | |
484 | ulen = skb->len; | |
1da177e4 | 485 | |
ba4e58ec GR |
486 | if (ulen < sizeof(*uh)) |
487 | goto short_packet; | |
1da177e4 | 488 | |
ba4e58ec GR |
489 | if (ulen < skb->len) { |
490 | if (pskb_trim_rcsum(skb, ulen)) | |
491 | goto short_packet; | |
0660e03f ACM |
492 | saddr = &ipv6_hdr(skb)->saddr; |
493 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 494 | uh = udp_hdr(skb); |
ba4e58ec | 495 | } |
ba4e58ec | 496 | } |
1da177e4 | 497 | |
759e5d00 HX |
498 | if (udp6_csum_init(skb, uh, proto)) |
499 | goto discard; | |
500 | ||
1ab1457c YH |
501 | /* |
502 | * Multicast receive code | |
1da177e4 | 503 | */ |
ba4e58ec | 504 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
505 | return __udp6_lib_mcast_deliver(net, skb, |
506 | saddr, daddr, udptable); | |
1da177e4 LT |
507 | |
508 | /* Unicast */ | |
509 | ||
1ab1457c | 510 | /* |
1da177e4 LT |
511 | * check socket cache ... must talk to Alan about his plans |
512 | * for sock caches... i'll skip this for now. | |
513 | */ | |
607c4aaf | 514 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
515 | |
516 | if (sk == NULL) { | |
517 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
518 | goto discard; | |
519 | ||
ba4e58ec | 520 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 521 | goto discard; |
ef28d1a2 PE |
522 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
523 | proto == IPPROTO_UDPLITE); | |
1da177e4 LT |
524 | |
525 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
526 | ||
527 | kfree_skb(skb); | |
add459aa | 528 | return 0; |
1da177e4 | 529 | } |
1ab1457c | 530 | |
1da177e4 | 531 | /* deliver */ |
1ab1457c | 532 | |
d97106ea | 533 | bh_lock_sock(sk); |
95766fff HA |
534 | if (!sock_owned_by_user(sk)) |
535 | udpv6_queue_rcv_skb(sk, skb); | |
536 | else | |
537 | sk_add_backlog(sk, skb); | |
538 | bh_unlock_sock(sk); | |
1da177e4 | 539 | sock_put(sk); |
add459aa | 540 | return 0; |
1da177e4 | 541 | |
1ab1457c | 542 | short_packet: |
ba4e58ec | 543 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 544 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 545 | ulen, skb->len); |
1da177e4 LT |
546 | |
547 | discard: | |
ef28d1a2 | 548 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 549 | kfree_skb(skb); |
add459aa | 550 | return 0; |
1da177e4 | 551 | } |
ba4e58ec | 552 | |
e5bbef20 | 553 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 554 | { |
e5bbef20 | 555 | return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP); |
ba4e58ec GR |
556 | } |
557 | ||
1da177e4 LT |
558 | /* |
559 | * Throw away all pending data and cancel the corking. Socket is locked. | |
560 | */ | |
561 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
562 | { | |
563 | struct udp_sock *up = udp_sk(sk); | |
564 | ||
36d926b9 DL |
565 | if (up->pending == AF_INET) |
566 | udp_flush_pending_frames(sk); | |
567 | else if (up->pending) { | |
1da177e4 LT |
568 | up->len = 0; |
569 | up->pending = 0; | |
570 | ip6_flush_pending_frames(sk); | |
1ab1457c | 571 | } |
1da177e4 LT |
572 | } |
573 | ||
574 | /* | |
575 | * Sending | |
576 | */ | |
577 | ||
4c0a6cb0 | 578 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
579 | { |
580 | struct sk_buff *skb; | |
581 | struct udphdr *uh; | |
4c0a6cb0 | 582 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
583 | struct inet_sock *inet = inet_sk(sk); |
584 | struct flowi *fl = &inet->cork.fl; | |
585 | int err = 0; | |
b2bf1e26 | 586 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 587 | __wsum csum = 0; |
1da177e4 LT |
588 | |
589 | /* Grab the skbuff where UDP header space exists. */ | |
590 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
591 | goto out; | |
592 | ||
593 | /* | |
594 | * Create a UDP header | |
595 | */ | |
4bedb452 | 596 | uh = udp_hdr(skb); |
1da177e4 LT |
597 | uh->source = fl->fl_ip_sport; |
598 | uh->dest = fl->fl_ip_dport; | |
599 | uh->len = htons(up->len); | |
600 | uh->check = 0; | |
601 | ||
b2bf1e26 | 602 | if (is_udplite) |
ba4e58ec GR |
603 | csum = udplite_csum_outgoing(sk, skb); |
604 | else | |
605 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 606 | |
ba4e58ec GR |
607 | /* add protocol-dependent pseudo-header */ |
608 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
609 | up->len, fl->proto, csum ); | |
1da177e4 | 610 | if (uh->check == 0) |
f6ab0288 | 611 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 612 | |
1da177e4 LT |
613 | err = ip6_push_pending_frames(sk); |
614 | out: | |
615 | up->len = 0; | |
616 | up->pending = 0; | |
cd562c98 | 617 | if (!err) |
235b9f7a PE |
618 | UDP6_INC_STATS_USER(sock_net(sk), |
619 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
620 | return err; |
621 | } | |
622 | ||
ba4e58ec | 623 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
624 | struct msghdr *msg, size_t len) |
625 | { | |
626 | struct ipv6_txoptions opt_space; | |
627 | struct udp_sock *up = udp_sk(sk); | |
628 | struct inet_sock *inet = inet_sk(sk); | |
629 | struct ipv6_pinfo *np = inet6_sk(sk); | |
630 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
631 | struct in6_addr *daddr, *final_p = NULL, final; | |
632 | struct ipv6_txoptions *opt = NULL; | |
633 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 634 | struct flowi fl; |
1da177e4 LT |
635 | struct dst_entry *dst; |
636 | int addr_len = msg->msg_namelen; | |
637 | int ulen = len; | |
638 | int hlimit = -1; | |
41a1f8ea | 639 | int tclass = -1; |
1da177e4 LT |
640 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
641 | int err; | |
987905de | 642 | int connected = 0; |
b2bf1e26 | 643 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 644 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
645 | |
646 | /* destination address check */ | |
647 | if (sin6) { | |
648 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
649 | return -EINVAL; | |
650 | ||
651 | switch (sin6->sin6_family) { | |
652 | case AF_INET6: | |
653 | if (addr_len < SIN6_LEN_RFC2133) | |
654 | return -EINVAL; | |
655 | daddr = &sin6->sin6_addr; | |
656 | break; | |
657 | case AF_INET: | |
658 | goto do_udp_sendmsg; | |
659 | case AF_UNSPEC: | |
660 | msg->msg_name = sin6 = NULL; | |
661 | msg->msg_namelen = addr_len = 0; | |
662 | daddr = NULL; | |
663 | break; | |
664 | default: | |
665 | return -EINVAL; | |
666 | } | |
667 | } else if (!up->pending) { | |
668 | if (sk->sk_state != TCP_ESTABLISHED) | |
669 | return -EDESTADDRREQ; | |
670 | daddr = &np->daddr; | |
1ab1457c | 671 | } else |
1da177e4 LT |
672 | daddr = NULL; |
673 | ||
674 | if (daddr) { | |
e773e4fa | 675 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
676 | struct sockaddr_in sin; |
677 | sin.sin_family = AF_INET; | |
678 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
679 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
680 | msg->msg_name = &sin; | |
681 | msg->msg_namelen = sizeof(sin); | |
682 | do_udp_sendmsg: | |
683 | if (__ipv6_only_sock(sk)) | |
684 | return -ENETUNREACH; | |
685 | return udp_sendmsg(iocb, sk, msg, len); | |
686 | } | |
687 | } | |
688 | ||
689 | if (up->pending == AF_INET) | |
690 | return udp_sendmsg(iocb, sk, msg, len); | |
691 | ||
692 | /* Rough check on arithmetic overflow, | |
b59e139b | 693 | better check is made in ip6_append_data(). |
1da177e4 LT |
694 | */ |
695 | if (len > INT_MAX - sizeof(struct udphdr)) | |
696 | return -EMSGSIZE; | |
1ab1457c | 697 | |
1da177e4 LT |
698 | if (up->pending) { |
699 | /* | |
700 | * There are pending frames. | |
701 | * The socket lock must be held while it's corked. | |
702 | */ | |
703 | lock_sock(sk); | |
704 | if (likely(up->pending)) { | |
705 | if (unlikely(up->pending != AF_INET6)) { | |
706 | release_sock(sk); | |
707 | return -EAFNOSUPPORT; | |
708 | } | |
709 | dst = NULL; | |
710 | goto do_append_data; | |
711 | } | |
712 | release_sock(sk); | |
713 | } | |
714 | ulen += sizeof(struct udphdr); | |
715 | ||
132a55f3 | 716 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
717 | |
718 | if (sin6) { | |
719 | if (sin6->sin6_port == 0) | |
720 | return -EINVAL; | |
721 | ||
132a55f3 | 722 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
723 | daddr = &sin6->sin6_addr; |
724 | ||
725 | if (np->sndflow) { | |
132a55f3 HX |
726 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
727 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
728 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
729 | if (flowlabel == NULL) |
730 | return -EINVAL; | |
731 | daddr = &flowlabel->dst; | |
732 | } | |
733 | } | |
734 | ||
735 | /* | |
736 | * Otherwise it will be difficult to maintain | |
737 | * sk->sk_dst_cache. | |
738 | */ | |
739 | if (sk->sk_state == TCP_ESTABLISHED && | |
740 | ipv6_addr_equal(daddr, &np->daddr)) | |
741 | daddr = &np->daddr; | |
742 | ||
743 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
744 | sin6->sin6_scope_id && | |
745 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 746 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
747 | } else { |
748 | if (sk->sk_state != TCP_ESTABLISHED) | |
749 | return -EDESTADDRREQ; | |
750 | ||
132a55f3 | 751 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 752 | daddr = &np->daddr; |
132a55f3 | 753 | fl.fl6_flowlabel = np->flow_label; |
987905de | 754 | connected = 1; |
1da177e4 LT |
755 | } |
756 | ||
132a55f3 HX |
757 | if (!fl.oif) |
758 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
759 | |
760 | if (msg->msg_controllen) { | |
761 | opt = &opt_space; | |
762 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
763 | opt->tot_len = sizeof(*opt); | |
764 | ||
91e1908f | 765 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
766 | if (err < 0) { |
767 | fl6_sock_release(flowlabel); | |
768 | return err; | |
769 | } | |
132a55f3 HX |
770 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
771 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
772 | if (flowlabel == NULL) |
773 | return -EINVAL; | |
774 | } | |
775 | if (!(opt->opt_nflen|opt->opt_flen)) | |
776 | opt = NULL; | |
987905de | 777 | connected = 0; |
1da177e4 LT |
778 | } |
779 | if (opt == NULL) | |
780 | opt = np->opt; | |
df9890c3 YH |
781 | if (flowlabel) |
782 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
783 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 784 | |
ba4e58ec | 785 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
786 | if (!ipv6_addr_any(daddr)) |
787 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
788 | else | |
789 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
790 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
791 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
792 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 793 | |
1da177e4 LT |
794 | /* merge ip6_build_xmit from ip6_output */ |
795 | if (opt && opt->srcrt) { | |
796 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
797 | ipv6_addr_copy(&final, &fl.fl6_dst); |
798 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 799 | final_p = &final; |
987905de | 800 | connected = 0; |
1da177e4 LT |
801 | } |
802 | ||
132a55f3 HX |
803 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
804 | fl.oif = np->mcast_oif; | |
987905de MK |
805 | connected = 0; |
806 | } | |
1da177e4 | 807 | |
132a55f3 | 808 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 809 | |
132a55f3 | 810 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
811 | if (err) |
812 | goto out; | |
813 | if (final_p) | |
132a55f3 | 814 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 815 | |
bb72845e | 816 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
817 | if (err == -EREMOTE) |
818 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
819 | if (err < 0) | |
820 | goto out; | |
821 | } | |
1da177e4 LT |
822 | |
823 | if (hlimit < 0) { | |
132a55f3 | 824 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
825 | hlimit = np->mcast_hops; |
826 | else | |
827 | hlimit = np->hop_limit; | |
828 | if (hlimit < 0) | |
6b75d090 | 829 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
830 | } |
831 | ||
41a1f8ea YH |
832 | if (tclass < 0) { |
833 | tclass = np->tclass; | |
834 | if (tclass < 0) | |
835 | tclass = 0; | |
836 | } | |
837 | ||
1da177e4 LT |
838 | if (msg->msg_flags&MSG_CONFIRM) |
839 | goto do_confirm; | |
840 | back_from_confirm: | |
841 | ||
842 | lock_sock(sk); | |
843 | if (unlikely(up->pending)) { | |
844 | /* The socket is already corked while preparing it. */ | |
845 | /* ... which is an evident application bug. --ANK */ | |
846 | release_sock(sk); | |
847 | ||
64ce2073 | 848 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
849 | err = -EINVAL; |
850 | goto out; | |
851 | } | |
852 | ||
853 | up->pending = AF_INET6; | |
854 | ||
855 | do_append_data: | |
856 | up->len += ulen; | |
ba4e58ec GR |
857 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
858 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 859 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
860 | (struct rt6_info*)dst, |
861 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
862 | if (err) |
863 | udp_v6_flush_pending_frames(sk); | |
864 | else if (!corkreq) | |
4c0a6cb0 | 865 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
866 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
867 | up->pending = 0; | |
1da177e4 | 868 | |
a5e7c210 DM |
869 | if (dst) { |
870 | if (connected) { | |
871 | ip6_dst_store(sk, dst, | |
132a55f3 | 872 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
873 | &np->daddr : NULL, |
874 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 875 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
876 | &np->saddr : |
877 | #endif | |
878 | NULL); | |
a5e7c210 DM |
879 | } else { |
880 | dst_release(dst); | |
881 | } | |
a3c96089 | 882 | dst = NULL; |
a5e7c210 DM |
883 | } |
884 | ||
1da177e4 LT |
885 | if (err > 0) |
886 | err = np->recverr ? net_xmit_errno(err) : 0; | |
887 | release_sock(sk); | |
888 | out: | |
a3c96089 | 889 | dst_release(dst); |
1da177e4 | 890 | fl6_sock_release(flowlabel); |
cd562c98 | 891 | if (!err) |
1da177e4 | 892 | return len; |
a18135eb DM |
893 | /* |
894 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
895 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
896 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
897 | * things). We could add another new stat but at least for now that | |
898 | * seems like overkill. | |
899 | */ | |
900 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
901 | UDP6_INC_STATS_USER(sock_net(sk), |
902 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 903 | } |
1da177e4 LT |
904 | return err; |
905 | ||
906 | do_confirm: | |
907 | dst_confirm(dst); | |
908 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
909 | goto back_from_confirm; | |
910 | err = 0; | |
911 | goto out; | |
912 | } | |
913 | ||
7d06b2e0 | 914 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
915 | { |
916 | lock_sock(sk); | |
917 | udp_v6_flush_pending_frames(sk); | |
918 | release_sock(sk); | |
919 | ||
920 | inet6_destroy_sock(sk); | |
1da177e4 LT |
921 | } |
922 | ||
923 | /* | |
924 | * Socket option code for UDP | |
925 | */ | |
ba4e58ec GR |
926 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
927 | char __user *optval, int optlen) | |
3fdadf7d | 928 | { |
db8dac20 | 929 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
930 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
931 | udp_v6_push_pending_frames); | |
ba4e58ec | 932 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
933 | } |
934 | ||
935 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
936 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
937 | char __user *optval, int optlen) | |
3fdadf7d | 938 | { |
db8dac20 | 939 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
940 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
941 | udp_v6_push_pending_frames); | |
ba4e58ec | 942 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
943 | } |
944 | #endif | |
945 | ||
ba4e58ec GR |
946 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
947 | char __user *optval, int __user *optlen) | |
3fdadf7d | 948 | { |
db8dac20 | 949 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 950 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 951 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
952 | } |
953 | ||
954 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
955 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
956 | char __user *optval, int __user *optlen) | |
3fdadf7d | 957 | { |
db8dac20 | 958 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 959 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 960 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
961 | } |
962 | #endif | |
963 | ||
1da177e4 LT |
964 | static struct inet6_protocol udpv6_protocol = { |
965 | .handler = udpv6_rcv, | |
966 | .err_handler = udpv6_err, | |
967 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
968 | }; | |
969 | ||
970 | /* ------------------------------------------------------------------------ */ | |
971 | #ifdef CONFIG_PROC_FS | |
972 | ||
973 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
974 | { | |
975 | struct inet_sock *inet = inet_sk(sp); | |
976 | struct ipv6_pinfo *np = inet6_sk(sp); | |
977 | struct in6_addr *dest, *src; | |
978 | __u16 destp, srcp; | |
979 | ||
980 | dest = &np->daddr; | |
981 | src = &np->rcv_saddr; | |
982 | destp = ntohs(inet->dport); | |
983 | srcp = ntohs(inet->sport); | |
984 | seq_printf(seq, | |
985 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
cb61cb9b | 986 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
987 | bucket, |
988 | src->s6_addr32[0], src->s6_addr32[1], | |
989 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
990 | dest->s6_addr32[0], dest->s6_addr32[1], | |
991 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 992 | sp->sk_state, |
1da177e4 LT |
993 | atomic_read(&sp->sk_wmem_alloc), |
994 | atomic_read(&sp->sk_rmem_alloc), | |
995 | 0, 0L, 0, | |
996 | sock_i_uid(sp), 0, | |
997 | sock_i_ino(sp), | |
cb61cb9b ED |
998 | atomic_read(&sp->sk_refcnt), sp, |
999 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1000 | } |
1001 | ||
ba4e58ec | 1002 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1003 | { |
1004 | if (v == SEQ_START_TOKEN) | |
1005 | seq_printf(seq, | |
1006 | " sl " | |
1007 | "local_address " | |
1008 | "remote_address " | |
1009 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1010 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1011 | else |
1012 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1da177e4 | 1016 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1017 | .name = "udp6", |
1018 | .family = AF_INET6, | |
ba4e58ec | 1019 | .hashtable = udp_hash, |
4ad96d39 DL |
1020 | .seq_fops = { |
1021 | .owner = THIS_MODULE, | |
1022 | }, | |
dda61925 DL |
1023 | .seq_ops = { |
1024 | .show = udp6_seq_show, | |
1025 | }, | |
1da177e4 LT |
1026 | }; |
1027 | ||
0c96d8c5 | 1028 | int udp6_proc_init(struct net *net) |
1da177e4 | 1029 | { |
0c96d8c5 | 1030 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1031 | } |
1032 | ||
0c96d8c5 DL |
1033 | void udp6_proc_exit(struct net *net) { |
1034 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1035 | } |
1036 | #endif /* CONFIG_PROC_FS */ | |
1037 | ||
1038 | /* ------------------------------------------------------------------------ */ | |
1039 | ||
1040 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1041 | .name = "UDPv6", |
1042 | .owner = THIS_MODULE, | |
ba4e58ec | 1043 | .close = udp_lib_close, |
543d9cfe ACM |
1044 | .connect = ip6_datagram_connect, |
1045 | .disconnect = udp_disconnect, | |
1046 | .ioctl = udp_ioctl, | |
1047 | .destroy = udpv6_destroy_sock, | |
1048 | .setsockopt = udpv6_setsockopt, | |
1049 | .getsockopt = udpv6_getsockopt, | |
1050 | .sendmsg = udpv6_sendmsg, | |
1051 | .recvmsg = udpv6_recvmsg, | |
1052 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1053 | .hash = udp_lib_hash, |
1054 | .unhash = udp_lib_unhash, | |
543d9cfe | 1055 | .get_port = udp_v6_get_port, |
95766fff HA |
1056 | .memory_allocated = &udp_memory_allocated, |
1057 | .sysctl_mem = sysctl_udp_mem, | |
1058 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1059 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1060 | .obj_size = sizeof(struct udp6_sock), |
6ba5a3c5 | 1061 | .h.udp_hash = udp_hash, |
3fdadf7d | 1062 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1063 | .compat_setsockopt = compat_udpv6_setsockopt, |
1064 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1065 | #endif |
1da177e4 LT |
1066 | }; |
1067 | ||
1da177e4 LT |
1068 | static struct inet_protosw udpv6_protosw = { |
1069 | .type = SOCK_DGRAM, | |
1070 | .protocol = IPPROTO_UDP, | |
1071 | .prot = &udpv6_prot, | |
1072 | .ops = &inet6_dgram_ops, | |
1073 | .capability =-1, | |
1074 | .no_check = UDP_CSUM_DEFAULT, | |
1075 | .flags = INET_PROTOSW_PERMANENT, | |
1076 | }; | |
1077 | ||
1078 | ||
7f4e4868 | 1079 | int __init udpv6_init(void) |
1da177e4 | 1080 | { |
7f4e4868 DL |
1081 | int ret; |
1082 | ||
1083 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1084 | if (ret) | |
1085 | goto out; | |
1086 | ||
1087 | ret = inet6_register_protosw(&udpv6_protosw); | |
1088 | if (ret) | |
1089 | goto out_udpv6_protocol; | |
1090 | out: | |
1091 | return ret; | |
1092 | ||
1093 | out_udpv6_protocol: | |
1094 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1095 | goto out; | |
1096 | } | |
1097 | ||
09f7709f | 1098 | void udpv6_exit(void) |
7f4e4868 DL |
1099 | { |
1100 | inet6_unregister_protosw(&udpv6_protosw); | |
1101 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1102 | } |