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); |
0856f939 WY |
239 | if (!skb_kill_datagram(sk, skb, flags)) { |
240 | if (is_udp4) | |
241 | UDP_INC_STATS_USER(sock_net(sk), | |
242 | UDP_MIB_INERRORS, is_udplite); | |
243 | else | |
244 | UDP6_INC_STATS_USER(sock_net(sk), | |
245 | UDP_MIB_INERRORS, is_udplite); | |
246 | } | |
95766fff | 247 | release_sock(sk); |
1da177e4 | 248 | |
7a0ff716 | 249 | if (flags & MSG_DONTWAIT) |
1da177e4 | 250 | return -EAGAIN; |
1da177e4 LT |
251 | goto try_again; |
252 | } | |
253 | ||
ba4e58ec GR |
254 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
255 | int type, int code, int offset, __be32 info, | |
256 | struct hlist_head udptable[] ) | |
1da177e4 LT |
257 | { |
258 | struct ipv6_pinfo *np; | |
259 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
260 | struct in6_addr *saddr = &hdr->saddr; |
261 | struct in6_addr *daddr = &hdr->daddr; | |
262 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
263 | struct sock *sk; | |
264 | int err; | |
265 | ||
c346dca1 | 266 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 267 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
268 | if (sk == NULL) |
269 | return; | |
270 | ||
271 | np = inet6_sk(sk); | |
272 | ||
273 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
274 | goto out; | |
275 | ||
276 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
277 | goto out; | |
278 | ||
279 | if (np->recverr) | |
280 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
281 | ||
282 | sk->sk_err = err; | |
283 | sk->sk_error_report(sk); | |
284 | out: | |
285 | sock_put(sk); | |
286 | } | |
287 | ||
ba4e58ec GR |
288 | static __inline__ void udpv6_err(struct sk_buff *skb, |
289 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 290 | int code, int offset, __be32 info ) |
ba4e58ec | 291 | { |
77d0d350 | 292 | __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash); |
ba4e58ec GR |
293 | } |
294 | ||
295 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 296 | { |
ba4e58ec | 297 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 298 | int rc; |
b2bf1e26 | 299 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 300 | |
ba4e58ec GR |
301 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
302 | goto drop; | |
1da177e4 | 303 | |
ba4e58ec GR |
304 | /* |
305 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
306 | */ | |
b2bf1e26 | 307 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
308 | |
309 | if (up->pcrlen == 0) { /* full coverage was set */ | |
310 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
311 | " %d while full coverage %d requested\n", | |
312 | UDP_SKB_CB(skb)->cscov, skb->len); | |
313 | goto drop; | |
314 | } | |
315 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
316 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
317 | "too small, need min %d\n", | |
318 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
319 | goto drop; | |
320 | } | |
1da177e4 LT |
321 | } |
322 | ||
1ab6eb62 HX |
323 | if (sk->sk_filter) { |
324 | if (udp_lib_checksum_complete(skb)) | |
325 | goto drop; | |
326 | } | |
ba4e58ec | 327 | |
a18135eb DM |
328 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
329 | /* Note that an ENOMEM error is charged twice */ | |
cb61cb9b | 330 | if (rc == -ENOMEM) { |
ef28d1a2 PE |
331 | UDP6_INC_STATS_BH(sock_net(sk), |
332 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
cb61cb9b ED |
333 | atomic_inc(&sk->sk_drops); |
334 | } | |
ba4e58ec | 335 | goto drop; |
1da177e4 | 336 | } |
cb75994e | 337 | |
1da177e4 | 338 | return 0; |
ba4e58ec | 339 | drop: |
ef28d1a2 | 340 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
341 | kfree_skb(skb); |
342 | return -1; | |
1da177e4 LT |
343 | } |
344 | ||
920a4611 | 345 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
346 | __be16 loc_port, struct in6_addr *loc_addr, |
347 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
348 | int dif) |
349 | { | |
350 | struct hlist_node *node; | |
351 | struct sock *s = sk; | |
352 | unsigned short num = ntohs(loc_port); | |
353 | ||
354 | sk_for_each_from(s, node) { | |
355 | struct inet_sock *inet = inet_sk(s); | |
356 | ||
920a4611 | 357 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
358 | continue; |
359 | ||
95f30b33 | 360 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
361 | struct ipv6_pinfo *np = inet6_sk(s); |
362 | if (inet->dport) { | |
363 | if (inet->dport != rmt_port) | |
364 | continue; | |
365 | } | |
366 | if (!ipv6_addr_any(&np->daddr) && | |
367 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
368 | continue; | |
369 | ||
370 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
371 | continue; | |
372 | ||
373 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
374 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
375 | continue; | |
1da177e4 | 376 | } |
add459aa | 377 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
378 | continue; |
379 | return s; | |
380 | } | |
381 | } | |
382 | return NULL; | |
383 | } | |
384 | ||
385 | /* | |
386 | * Note: called only from the BH handler context, | |
387 | * so we don't need to lock the hashes. | |
388 | */ | |
e3163493 PE |
389 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
390 | struct in6_addr *saddr, struct in6_addr *daddr, | |
391 | struct hlist_head udptable[]) | |
1da177e4 LT |
392 | { |
393 | struct sock *sk, *sk2; | |
4bedb452 | 394 | const struct udphdr *uh = udp_hdr(skb); |
1da177e4 LT |
395 | int dif; |
396 | ||
397 | read_lock(&udp_hash_lock); | |
19c7578f | 398 | sk = sk_head(&udptable[udp_hashfn(net, ntohs(uh->dest))]); |
f2776ff0 | 399 | dif = inet6_iif(skb); |
920a4611 | 400 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
1da177e4 LT |
401 | if (!sk) { |
402 | kfree_skb(skb); | |
403 | goto out; | |
404 | } | |
405 | ||
406 | sk2 = sk; | |
920a4611 | 407 | while ((sk2 = udp_v6_mcast_next(net, sk_next(sk2), uh->dest, daddr, |
1da177e4 LT |
408 | uh->source, saddr, dif))) { |
409 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
95766fff | 410 | if (buff) { |
d97106ea | 411 | bh_lock_sock(sk2); |
95766fff HA |
412 | if (!sock_owned_by_user(sk2)) |
413 | udpv6_queue_rcv_skb(sk2, buff); | |
414 | else | |
415 | sk_add_backlog(sk2, buff); | |
416 | bh_unlock_sock(sk2); | |
417 | } | |
1da177e4 | 418 | } |
d97106ea | 419 | bh_lock_sock(sk); |
95766fff HA |
420 | if (!sock_owned_by_user(sk)) |
421 | udpv6_queue_rcv_skb(sk, skb); | |
422 | else | |
423 | sk_add_backlog(sk, skb); | |
424 | bh_unlock_sock(sk); | |
1da177e4 LT |
425 | out: |
426 | read_unlock(&udp_hash_lock); | |
ba4e58ec | 427 | return 0; |
1da177e4 LT |
428 | } |
429 | ||
759e5d00 HX |
430 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
431 | int proto) | |
ba4e58ec | 432 | { |
759e5d00 HX |
433 | int err; |
434 | ||
435 | UDP_SKB_CB(skb)->partial_cov = 0; | |
436 | UDP_SKB_CB(skb)->cscov = skb->len; | |
437 | ||
db8dac20 | 438 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
439 | err = udplite_checksum_init(skb, uh); |
440 | if (err) | |
441 | return err; | |
442 | } | |
443 | ||
ba4e58ec GR |
444 | if (uh->check == 0) { |
445 | /* RFC 2460 section 8.1 says that we SHOULD log | |
446 | this error. Well, it is reasonable. | |
447 | */ | |
448 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
449 | return 1; | |
450 | } | |
451 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 452 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 453 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
454 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
455 | ||
60476372 | 456 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
457 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
458 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 459 | skb->len, proto, 0)); |
ba4e58ec | 460 | |
759e5d00 | 461 | return 0; |
ba4e58ec GR |
462 | } |
463 | ||
e5bbef20 | 464 | int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[], |
759e5d00 | 465 | int proto) |
1da177e4 | 466 | { |
1da177e4 | 467 | struct sock *sk; |
1ab1457c | 468 | struct udphdr *uh; |
1da177e4 LT |
469 | struct net_device *dev = skb->dev; |
470 | struct in6_addr *saddr, *daddr; | |
471 | u32 ulen = 0; | |
ef28d1a2 | 472 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
473 | |
474 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
475 | goto short_packet; | |
476 | ||
0660e03f ACM |
477 | saddr = &ipv6_hdr(skb)->saddr; |
478 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 479 | uh = udp_hdr(skb); |
1da177e4 LT |
480 | |
481 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
482 | if (ulen > skb->len) |
483 | goto short_packet; | |
1da177e4 | 484 | |
759e5d00 HX |
485 | if (proto == IPPROTO_UDP) { |
486 | /* UDP validates ulen. */ | |
1da177e4 | 487 | |
ba4e58ec GR |
488 | /* Check for jumbo payload */ |
489 | if (ulen == 0) | |
490 | ulen = skb->len; | |
1da177e4 | 491 | |
ba4e58ec GR |
492 | if (ulen < sizeof(*uh)) |
493 | goto short_packet; | |
1da177e4 | 494 | |
ba4e58ec GR |
495 | if (ulen < skb->len) { |
496 | if (pskb_trim_rcsum(skb, ulen)) | |
497 | goto short_packet; | |
0660e03f ACM |
498 | saddr = &ipv6_hdr(skb)->saddr; |
499 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 500 | uh = udp_hdr(skb); |
ba4e58ec | 501 | } |
ba4e58ec | 502 | } |
1da177e4 | 503 | |
759e5d00 HX |
504 | if (udp6_csum_init(skb, uh, proto)) |
505 | goto discard; | |
506 | ||
1ab1457c YH |
507 | /* |
508 | * Multicast receive code | |
1da177e4 | 509 | */ |
ba4e58ec | 510 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
511 | return __udp6_lib_mcast_deliver(net, skb, |
512 | saddr, daddr, udptable); | |
1da177e4 LT |
513 | |
514 | /* Unicast */ | |
515 | ||
1ab1457c | 516 | /* |
1da177e4 LT |
517 | * check socket cache ... must talk to Alan about his plans |
518 | * for sock caches... i'll skip this for now. | |
519 | */ | |
607c4aaf | 520 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
521 | |
522 | if (sk == NULL) { | |
523 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
524 | goto discard; | |
525 | ||
ba4e58ec | 526 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 527 | goto discard; |
ef28d1a2 PE |
528 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
529 | proto == IPPROTO_UDPLITE); | |
1da177e4 LT |
530 | |
531 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
532 | ||
533 | kfree_skb(skb); | |
add459aa | 534 | return 0; |
1da177e4 | 535 | } |
1ab1457c | 536 | |
1da177e4 | 537 | /* deliver */ |
1ab1457c | 538 | |
d97106ea | 539 | bh_lock_sock(sk); |
95766fff HA |
540 | if (!sock_owned_by_user(sk)) |
541 | udpv6_queue_rcv_skb(sk, skb); | |
542 | else | |
543 | sk_add_backlog(sk, skb); | |
544 | bh_unlock_sock(sk); | |
1da177e4 | 545 | sock_put(sk); |
add459aa | 546 | return 0; |
1da177e4 | 547 | |
1ab1457c | 548 | short_packet: |
ba4e58ec | 549 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 550 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 551 | ulen, skb->len); |
1da177e4 LT |
552 | |
553 | discard: | |
ef28d1a2 | 554 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 555 | kfree_skb(skb); |
add459aa | 556 | return 0; |
1da177e4 | 557 | } |
ba4e58ec | 558 | |
e5bbef20 | 559 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 560 | { |
e5bbef20 | 561 | return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP); |
ba4e58ec GR |
562 | } |
563 | ||
1da177e4 LT |
564 | /* |
565 | * Throw away all pending data and cancel the corking. Socket is locked. | |
566 | */ | |
567 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
568 | { | |
569 | struct udp_sock *up = udp_sk(sk); | |
570 | ||
36d926b9 DL |
571 | if (up->pending == AF_INET) |
572 | udp_flush_pending_frames(sk); | |
573 | else if (up->pending) { | |
1da177e4 LT |
574 | up->len = 0; |
575 | up->pending = 0; | |
576 | ip6_flush_pending_frames(sk); | |
1ab1457c | 577 | } |
1da177e4 LT |
578 | } |
579 | ||
580 | /* | |
581 | * Sending | |
582 | */ | |
583 | ||
4c0a6cb0 | 584 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
585 | { |
586 | struct sk_buff *skb; | |
587 | struct udphdr *uh; | |
4c0a6cb0 | 588 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
589 | struct inet_sock *inet = inet_sk(sk); |
590 | struct flowi *fl = &inet->cork.fl; | |
591 | int err = 0; | |
b2bf1e26 | 592 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 593 | __wsum csum = 0; |
1da177e4 LT |
594 | |
595 | /* Grab the skbuff where UDP header space exists. */ | |
596 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
597 | goto out; | |
598 | ||
599 | /* | |
600 | * Create a UDP header | |
601 | */ | |
4bedb452 | 602 | uh = udp_hdr(skb); |
1da177e4 LT |
603 | uh->source = fl->fl_ip_sport; |
604 | uh->dest = fl->fl_ip_dport; | |
605 | uh->len = htons(up->len); | |
606 | uh->check = 0; | |
607 | ||
b2bf1e26 | 608 | if (is_udplite) |
ba4e58ec GR |
609 | csum = udplite_csum_outgoing(sk, skb); |
610 | else | |
611 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 612 | |
ba4e58ec GR |
613 | /* add protocol-dependent pseudo-header */ |
614 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
615 | up->len, fl->proto, csum ); | |
1da177e4 | 616 | if (uh->check == 0) |
f6ab0288 | 617 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 618 | |
1da177e4 LT |
619 | err = ip6_push_pending_frames(sk); |
620 | out: | |
621 | up->len = 0; | |
622 | up->pending = 0; | |
cd562c98 | 623 | if (!err) |
235b9f7a PE |
624 | UDP6_INC_STATS_USER(sock_net(sk), |
625 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
626 | return err; |
627 | } | |
628 | ||
ba4e58ec | 629 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
630 | struct msghdr *msg, size_t len) |
631 | { | |
632 | struct ipv6_txoptions opt_space; | |
633 | struct udp_sock *up = udp_sk(sk); | |
634 | struct inet_sock *inet = inet_sk(sk); | |
635 | struct ipv6_pinfo *np = inet6_sk(sk); | |
636 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
637 | struct in6_addr *daddr, *final_p = NULL, final; | |
638 | struct ipv6_txoptions *opt = NULL; | |
639 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 640 | struct flowi fl; |
1da177e4 LT |
641 | struct dst_entry *dst; |
642 | int addr_len = msg->msg_namelen; | |
643 | int ulen = len; | |
644 | int hlimit = -1; | |
41a1f8ea | 645 | int tclass = -1; |
1da177e4 LT |
646 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
647 | int err; | |
987905de | 648 | int connected = 0; |
b2bf1e26 | 649 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 650 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
651 | |
652 | /* destination address check */ | |
653 | if (sin6) { | |
654 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
655 | return -EINVAL; | |
656 | ||
657 | switch (sin6->sin6_family) { | |
658 | case AF_INET6: | |
659 | if (addr_len < SIN6_LEN_RFC2133) | |
660 | return -EINVAL; | |
661 | daddr = &sin6->sin6_addr; | |
662 | break; | |
663 | case AF_INET: | |
664 | goto do_udp_sendmsg; | |
665 | case AF_UNSPEC: | |
666 | msg->msg_name = sin6 = NULL; | |
667 | msg->msg_namelen = addr_len = 0; | |
668 | daddr = NULL; | |
669 | break; | |
670 | default: | |
671 | return -EINVAL; | |
672 | } | |
673 | } else if (!up->pending) { | |
674 | if (sk->sk_state != TCP_ESTABLISHED) | |
675 | return -EDESTADDRREQ; | |
676 | daddr = &np->daddr; | |
1ab1457c | 677 | } else |
1da177e4 LT |
678 | daddr = NULL; |
679 | ||
680 | if (daddr) { | |
e773e4fa | 681 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
682 | struct sockaddr_in sin; |
683 | sin.sin_family = AF_INET; | |
684 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
685 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
686 | msg->msg_name = &sin; | |
687 | msg->msg_namelen = sizeof(sin); | |
688 | do_udp_sendmsg: | |
689 | if (__ipv6_only_sock(sk)) | |
690 | return -ENETUNREACH; | |
691 | return udp_sendmsg(iocb, sk, msg, len); | |
692 | } | |
693 | } | |
694 | ||
695 | if (up->pending == AF_INET) | |
696 | return udp_sendmsg(iocb, sk, msg, len); | |
697 | ||
698 | /* Rough check on arithmetic overflow, | |
b59e139b | 699 | better check is made in ip6_append_data(). |
1da177e4 LT |
700 | */ |
701 | if (len > INT_MAX - sizeof(struct udphdr)) | |
702 | return -EMSGSIZE; | |
1ab1457c | 703 | |
1da177e4 LT |
704 | if (up->pending) { |
705 | /* | |
706 | * There are pending frames. | |
707 | * The socket lock must be held while it's corked. | |
708 | */ | |
709 | lock_sock(sk); | |
710 | if (likely(up->pending)) { | |
711 | if (unlikely(up->pending != AF_INET6)) { | |
712 | release_sock(sk); | |
713 | return -EAFNOSUPPORT; | |
714 | } | |
715 | dst = NULL; | |
716 | goto do_append_data; | |
717 | } | |
718 | release_sock(sk); | |
719 | } | |
720 | ulen += sizeof(struct udphdr); | |
721 | ||
132a55f3 | 722 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
723 | |
724 | if (sin6) { | |
725 | if (sin6->sin6_port == 0) | |
726 | return -EINVAL; | |
727 | ||
132a55f3 | 728 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
729 | daddr = &sin6->sin6_addr; |
730 | ||
731 | if (np->sndflow) { | |
132a55f3 HX |
732 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
733 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
734 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
735 | if (flowlabel == NULL) |
736 | return -EINVAL; | |
737 | daddr = &flowlabel->dst; | |
738 | } | |
739 | } | |
740 | ||
741 | /* | |
742 | * Otherwise it will be difficult to maintain | |
743 | * sk->sk_dst_cache. | |
744 | */ | |
745 | if (sk->sk_state == TCP_ESTABLISHED && | |
746 | ipv6_addr_equal(daddr, &np->daddr)) | |
747 | daddr = &np->daddr; | |
748 | ||
749 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
750 | sin6->sin6_scope_id && | |
751 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 752 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
753 | } else { |
754 | if (sk->sk_state != TCP_ESTABLISHED) | |
755 | return -EDESTADDRREQ; | |
756 | ||
132a55f3 | 757 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 758 | daddr = &np->daddr; |
132a55f3 | 759 | fl.fl6_flowlabel = np->flow_label; |
987905de | 760 | connected = 1; |
1da177e4 LT |
761 | } |
762 | ||
132a55f3 HX |
763 | if (!fl.oif) |
764 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
765 | |
766 | if (msg->msg_controllen) { | |
767 | opt = &opt_space; | |
768 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
769 | opt->tot_len = sizeof(*opt); | |
770 | ||
91e1908f | 771 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
772 | if (err < 0) { |
773 | fl6_sock_release(flowlabel); | |
774 | return err; | |
775 | } | |
132a55f3 HX |
776 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
777 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
778 | if (flowlabel == NULL) |
779 | return -EINVAL; | |
780 | } | |
781 | if (!(opt->opt_nflen|opt->opt_flen)) | |
782 | opt = NULL; | |
987905de | 783 | connected = 0; |
1da177e4 LT |
784 | } |
785 | if (opt == NULL) | |
786 | opt = np->opt; | |
df9890c3 YH |
787 | if (flowlabel) |
788 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
789 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 790 | |
ba4e58ec | 791 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
792 | if (!ipv6_addr_any(daddr)) |
793 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
794 | else | |
795 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
796 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
797 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
798 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 799 | |
1da177e4 LT |
800 | /* merge ip6_build_xmit from ip6_output */ |
801 | if (opt && opt->srcrt) { | |
802 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
803 | ipv6_addr_copy(&final, &fl.fl6_dst); |
804 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 805 | final_p = &final; |
987905de | 806 | connected = 0; |
1da177e4 LT |
807 | } |
808 | ||
132a55f3 HX |
809 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
810 | fl.oif = np->mcast_oif; | |
987905de MK |
811 | connected = 0; |
812 | } | |
1da177e4 | 813 | |
132a55f3 | 814 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 815 | |
132a55f3 | 816 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
817 | if (err) |
818 | goto out; | |
819 | if (final_p) | |
132a55f3 | 820 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 821 | |
bb72845e | 822 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
823 | if (err == -EREMOTE) |
824 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
825 | if (err < 0) | |
826 | goto out; | |
827 | } | |
1da177e4 LT |
828 | |
829 | if (hlimit < 0) { | |
132a55f3 | 830 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
831 | hlimit = np->mcast_hops; |
832 | else | |
833 | hlimit = np->hop_limit; | |
834 | if (hlimit < 0) | |
6b75d090 | 835 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
836 | } |
837 | ||
41a1f8ea YH |
838 | if (tclass < 0) { |
839 | tclass = np->tclass; | |
840 | if (tclass < 0) | |
841 | tclass = 0; | |
842 | } | |
843 | ||
1da177e4 LT |
844 | if (msg->msg_flags&MSG_CONFIRM) |
845 | goto do_confirm; | |
846 | back_from_confirm: | |
847 | ||
848 | lock_sock(sk); | |
849 | if (unlikely(up->pending)) { | |
850 | /* The socket is already corked while preparing it. */ | |
851 | /* ... which is an evident application bug. --ANK */ | |
852 | release_sock(sk); | |
853 | ||
64ce2073 | 854 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
855 | err = -EINVAL; |
856 | goto out; | |
857 | } | |
858 | ||
859 | up->pending = AF_INET6; | |
860 | ||
861 | do_append_data: | |
862 | up->len += ulen; | |
ba4e58ec GR |
863 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
864 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 865 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
866 | (struct rt6_info*)dst, |
867 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
868 | if (err) |
869 | udp_v6_flush_pending_frames(sk); | |
870 | else if (!corkreq) | |
4c0a6cb0 | 871 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
872 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
873 | up->pending = 0; | |
1da177e4 | 874 | |
a5e7c210 DM |
875 | if (dst) { |
876 | if (connected) { | |
877 | ip6_dst_store(sk, dst, | |
132a55f3 | 878 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
879 | &np->daddr : NULL, |
880 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 881 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
882 | &np->saddr : |
883 | #endif | |
884 | NULL); | |
a5e7c210 DM |
885 | } else { |
886 | dst_release(dst); | |
887 | } | |
a3c96089 | 888 | dst = NULL; |
a5e7c210 DM |
889 | } |
890 | ||
1da177e4 LT |
891 | if (err > 0) |
892 | err = np->recverr ? net_xmit_errno(err) : 0; | |
893 | release_sock(sk); | |
894 | out: | |
a3c96089 | 895 | dst_release(dst); |
1da177e4 | 896 | fl6_sock_release(flowlabel); |
cd562c98 | 897 | if (!err) |
1da177e4 | 898 | return len; |
a18135eb DM |
899 | /* |
900 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
901 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
902 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
903 | * things). We could add another new stat but at least for now that | |
904 | * seems like overkill. | |
905 | */ | |
906 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
907 | UDP6_INC_STATS_USER(sock_net(sk), |
908 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 909 | } |
1da177e4 LT |
910 | return err; |
911 | ||
912 | do_confirm: | |
913 | dst_confirm(dst); | |
914 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
915 | goto back_from_confirm; | |
916 | err = 0; | |
917 | goto out; | |
918 | } | |
919 | ||
7d06b2e0 | 920 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
921 | { |
922 | lock_sock(sk); | |
923 | udp_v6_flush_pending_frames(sk); | |
924 | release_sock(sk); | |
925 | ||
926 | inet6_destroy_sock(sk); | |
1da177e4 LT |
927 | } |
928 | ||
929 | /* | |
930 | * Socket option code for UDP | |
931 | */ | |
ba4e58ec GR |
932 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
933 | char __user *optval, int optlen) | |
3fdadf7d | 934 | { |
db8dac20 | 935 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
936 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
937 | udp_v6_push_pending_frames); | |
ba4e58ec | 938 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
939 | } |
940 | ||
941 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
942 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
943 | char __user *optval, int optlen) | |
3fdadf7d | 944 | { |
db8dac20 | 945 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
946 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
947 | udp_v6_push_pending_frames); | |
ba4e58ec | 948 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
949 | } |
950 | #endif | |
951 | ||
ba4e58ec GR |
952 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
953 | char __user *optval, int __user *optlen) | |
3fdadf7d | 954 | { |
db8dac20 | 955 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 956 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 957 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
958 | } |
959 | ||
960 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
961 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
962 | char __user *optval, int __user *optlen) | |
3fdadf7d | 963 | { |
db8dac20 | 964 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 965 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 966 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
967 | } |
968 | #endif | |
969 | ||
1da177e4 LT |
970 | static struct inet6_protocol udpv6_protocol = { |
971 | .handler = udpv6_rcv, | |
972 | .err_handler = udpv6_err, | |
973 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
974 | }; | |
975 | ||
976 | /* ------------------------------------------------------------------------ */ | |
977 | #ifdef CONFIG_PROC_FS | |
978 | ||
979 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
980 | { | |
981 | struct inet_sock *inet = inet_sk(sp); | |
982 | struct ipv6_pinfo *np = inet6_sk(sp); | |
983 | struct in6_addr *dest, *src; | |
984 | __u16 destp, srcp; | |
985 | ||
986 | dest = &np->daddr; | |
987 | src = &np->rcv_saddr; | |
988 | destp = ntohs(inet->dport); | |
989 | srcp = ntohs(inet->sport); | |
990 | seq_printf(seq, | |
991 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
cb61cb9b | 992 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
993 | bucket, |
994 | src->s6_addr32[0], src->s6_addr32[1], | |
995 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
996 | dest->s6_addr32[0], dest->s6_addr32[1], | |
997 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 998 | sp->sk_state, |
1da177e4 LT |
999 | atomic_read(&sp->sk_wmem_alloc), |
1000 | atomic_read(&sp->sk_rmem_alloc), | |
1001 | 0, 0L, 0, | |
1002 | sock_i_uid(sp), 0, | |
1003 | sock_i_ino(sp), | |
cb61cb9b ED |
1004 | atomic_read(&sp->sk_refcnt), sp, |
1005 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1006 | } |
1007 | ||
ba4e58ec | 1008 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1009 | { |
1010 | if (v == SEQ_START_TOKEN) | |
1011 | seq_printf(seq, | |
1012 | " sl " | |
1013 | "local_address " | |
1014 | "remote_address " | |
1015 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1016 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1017 | else |
1018 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1da177e4 | 1022 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1023 | .name = "udp6", |
1024 | .family = AF_INET6, | |
ba4e58ec | 1025 | .hashtable = udp_hash, |
4ad96d39 DL |
1026 | .seq_fops = { |
1027 | .owner = THIS_MODULE, | |
1028 | }, | |
dda61925 DL |
1029 | .seq_ops = { |
1030 | .show = udp6_seq_show, | |
1031 | }, | |
1da177e4 LT |
1032 | }; |
1033 | ||
0c96d8c5 | 1034 | int udp6_proc_init(struct net *net) |
1da177e4 | 1035 | { |
0c96d8c5 | 1036 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1037 | } |
1038 | ||
0c96d8c5 DL |
1039 | void udp6_proc_exit(struct net *net) { |
1040 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1041 | } |
1042 | #endif /* CONFIG_PROC_FS */ | |
1043 | ||
1044 | /* ------------------------------------------------------------------------ */ | |
1045 | ||
1046 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1047 | .name = "UDPv6", |
1048 | .owner = THIS_MODULE, | |
ba4e58ec | 1049 | .close = udp_lib_close, |
543d9cfe ACM |
1050 | .connect = ip6_datagram_connect, |
1051 | .disconnect = udp_disconnect, | |
1052 | .ioctl = udp_ioctl, | |
1053 | .destroy = udpv6_destroy_sock, | |
1054 | .setsockopt = udpv6_setsockopt, | |
1055 | .getsockopt = udpv6_getsockopt, | |
1056 | .sendmsg = udpv6_sendmsg, | |
1057 | .recvmsg = udpv6_recvmsg, | |
1058 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1059 | .hash = udp_lib_hash, |
1060 | .unhash = udp_lib_unhash, | |
543d9cfe | 1061 | .get_port = udp_v6_get_port, |
95766fff HA |
1062 | .memory_allocated = &udp_memory_allocated, |
1063 | .sysctl_mem = sysctl_udp_mem, | |
1064 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1065 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1066 | .obj_size = sizeof(struct udp6_sock), |
6ba5a3c5 | 1067 | .h.udp_hash = udp_hash, |
3fdadf7d | 1068 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1069 | .compat_setsockopt = compat_udpv6_setsockopt, |
1070 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1071 | #endif |
1da177e4 LT |
1072 | }; |
1073 | ||
1da177e4 LT |
1074 | static struct inet_protosw udpv6_protosw = { |
1075 | .type = SOCK_DGRAM, | |
1076 | .protocol = IPPROTO_UDP, | |
1077 | .prot = &udpv6_prot, | |
1078 | .ops = &inet6_dgram_ops, | |
1079 | .capability =-1, | |
1080 | .no_check = UDP_CSUM_DEFAULT, | |
1081 | .flags = INET_PROTOSW_PERMANENT, | |
1082 | }; | |
1083 | ||
1084 | ||
7f4e4868 | 1085 | int __init udpv6_init(void) |
1da177e4 | 1086 | { |
7f4e4868 DL |
1087 | int ret; |
1088 | ||
1089 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1090 | if (ret) | |
1091 | goto out; | |
1092 | ||
1093 | ret = inet6_register_protosw(&udpv6_protosw); | |
1094 | if (ret) | |
1095 | goto out_udpv6_protocol; | |
1096 | out: | |
1097 | return ret; | |
1098 | ||
1099 | out_udpv6_protocol: | |
1100 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1101 | goto out; | |
1102 | } | |
1103 | ||
09f7709f | 1104 | void udpv6_exit(void) |
7f4e4868 DL |
1105 | { |
1106 | inet6_unregister_protosw(&udpv6_protosw); | |
1107 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1108 | } |