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 | * | |
10 | * $Id: udp.c,v 1.65 2002/02/01 22:01:04 davem Exp $ | |
11 | * | |
12 | * Fixes: | |
13 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
14 | * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which | |
15 | * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind | |
16 | * a single port at the same time. | |
17 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data | |
18 | * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. | |
19 | * | |
20 | * This program is free software; you can redistribute it and/or | |
21 | * modify it under the terms of the GNU General Public License | |
22 | * as published by the Free Software Foundation; either version | |
23 | * 2 of the License, or (at your option) any later version. | |
24 | */ | |
25 | ||
1da177e4 LT |
26 | #include <linux/errno.h> |
27 | #include <linux/types.h> | |
28 | #include <linux/socket.h> | |
29 | #include <linux/sockios.h> | |
1da177e4 LT |
30 | #include <linux/net.h> |
31 | #include <linux/in6.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/if_arp.h> | |
34 | #include <linux/ipv6.h> | |
35 | #include <linux/icmpv6.h> | |
36 | #include <linux/init.h> | |
1781f7f5 | 37 | #include <linux/module.h> |
3305b80c | 38 | #include <linux/skbuff.h> |
1da177e4 LT |
39 | #include <asm/uaccess.h> |
40 | ||
1da177e4 LT |
41 | #include <net/ndisc.h> |
42 | #include <net/protocol.h> | |
43 | #include <net/transp_v6.h> | |
44 | #include <net/ip6_route.h> | |
1da177e4 | 45 | #include <net/raw.h> |
c752f073 | 46 | #include <net/tcp_states.h> |
1da177e4 LT |
47 | #include <net/ip6_checksum.h> |
48 | #include <net/xfrm.h> | |
49 | ||
50 | #include <linux/proc_fs.h> | |
51 | #include <linux/seq_file.h> | |
ba4e58ec | 52 | #include "udp_impl.h" |
1da177e4 | 53 | |
25030a7f | 54 | static inline int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 55 | { |
df2bc459 | 56 | return udp_get_port(sk, snum, ipv6_rcv_saddr_equal); |
1da177e4 LT |
57 | } |
58 | ||
ba4e58ec GR |
59 | static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport, |
60 | struct in6_addr *daddr, __be16 dport, | |
61 | int dif, struct hlist_head udptable[]) | |
1da177e4 LT |
62 | { |
63 | struct sock *sk, *result = NULL; | |
64 | struct hlist_node *node; | |
65 | unsigned short hnum = ntohs(dport); | |
66 | int badness = -1; | |
67 | ||
1ab1457c | 68 | read_lock(&udp_hash_lock); |
ba4e58ec | 69 | sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) { |
1da177e4 LT |
70 | struct inet_sock *inet = inet_sk(sk); |
71 | ||
95f30b33 | 72 | if (sk->sk_hash == hnum && 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 | ||
1da177e4 LT |
110 | /* |
111 | * This should be easy, if there is something there we | |
112 | * return it, otherwise we block. | |
113 | */ | |
114 | ||
ba4e58ec | 115 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
116 | struct msghdr *msg, size_t len, |
117 | int noblock, int flags, int *addr_len) | |
118 | { | |
119 | struct ipv6_pinfo *np = inet6_sk(sk); | |
120 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 121 | struct sk_buff *skb; |
759e5d00 | 122 | unsigned int ulen, copied; |
a59322be | 123 | int peeked; |
759e5d00 HX |
124 | int err; |
125 | int is_udplite = IS_UDPLITE(sk); | |
1da177e4 | 126 | |
1ab1457c YH |
127 | if (addr_len) |
128 | *addr_len=sizeof(struct sockaddr_in6); | |
129 | ||
1da177e4 LT |
130 | if (flags & MSG_ERRQUEUE) |
131 | return ipv6_recv_error(sk, msg, len); | |
132 | ||
133 | try_again: | |
a59322be HX |
134 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
135 | &peeked, &err); | |
1da177e4 LT |
136 | if (!skb) |
137 | goto out; | |
138 | ||
759e5d00 HX |
139 | ulen = skb->len - sizeof(struct udphdr); |
140 | copied = len; | |
141 | if (copied > ulen) | |
142 | copied = ulen; | |
143 | else if (copied < ulen) | |
1ab1457c | 144 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 145 | |
ba4e58ec | 146 | /* |
759e5d00 HX |
147 | * If checksum is needed at all, try to do it while copying the |
148 | * data. If the data is truncated, or if we only want a partial | |
149 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 150 | */ |
ba4e58ec | 151 | |
759e5d00 HX |
152 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
153 | if (udp_lib_checksum_complete(skb)) | |
1da177e4 | 154 | goto csum_copy_err; |
ba4e58ec GR |
155 | } |
156 | ||
60476372 | 157 | if (skb_csum_unnecessary(skb)) |
ba4e58ec GR |
158 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
159 | msg->msg_iov, copied ); | |
160 | else { | |
1da177e4 LT |
161 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
162 | if (err == -EINVAL) | |
163 | goto csum_copy_err; | |
164 | } | |
165 | if (err) | |
166 | goto out_free; | |
167 | ||
a59322be HX |
168 | if (!peeked) |
169 | UDP6_INC_STATS_USER(UDP_MIB_INDATAGRAMS, is_udplite); | |
cb75994e | 170 | |
1da177e4 LT |
171 | sock_recv_timestamp(msg, sk, skb); |
172 | ||
173 | /* Copy the address. */ | |
174 | if (msg->msg_name) { | |
175 | struct sockaddr_in6 *sin6; | |
1ab1457c | 176 | |
1da177e4 LT |
177 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
178 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 179 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
180 | sin6->sin6_flowinfo = 0; |
181 | sin6->sin6_scope_id = 0; | |
182 | ||
183 | if (skb->protocol == htons(ETH_P_IP)) | |
184 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, | |
eddc9ec5 | 185 | htonl(0xffff), ip_hdr(skb)->saddr); |
1da177e4 | 186 | else { |
0660e03f ACM |
187 | ipv6_addr_copy(&sin6->sin6_addr, |
188 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
189 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
190 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
191 | } | |
192 | ||
193 | } | |
194 | if (skb->protocol == htons(ETH_P_IP)) { | |
195 | if (inet->cmsg_flags) | |
196 | ip_cmsg_recv(msg, skb); | |
197 | } else { | |
198 | if (np->rxopt.all) | |
199 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 200 | } |
1da177e4 LT |
201 | |
202 | err = copied; | |
203 | if (flags & MSG_TRUNC) | |
759e5d00 | 204 | err = ulen; |
1da177e4 LT |
205 | |
206 | out_free: | |
95766fff | 207 | lock_sock(sk); |
1da177e4 | 208 | skb_free_datagram(sk, skb); |
95766fff | 209 | release_sock(sk); |
1da177e4 LT |
210 | out: |
211 | return err; | |
212 | ||
213 | csum_copy_err: | |
95766fff | 214 | lock_sock(sk); |
27ab2568 HX |
215 | if (!skb_kill_datagram(sk, skb, flags)) |
216 | UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite); | |
95766fff | 217 | release_sock(sk); |
1da177e4 | 218 | |
7a0ff716 | 219 | if (flags & MSG_DONTWAIT) |
1da177e4 | 220 | return -EAGAIN; |
1da177e4 LT |
221 | goto try_again; |
222 | } | |
223 | ||
ba4e58ec GR |
224 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
225 | int type, int code, int offset, __be32 info, | |
226 | struct hlist_head udptable[] ) | |
1da177e4 LT |
227 | { |
228 | struct ipv6_pinfo *np; | |
229 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
230 | struct in6_addr *saddr = &hdr->saddr; |
231 | struct in6_addr *daddr = &hdr->daddr; | |
232 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
233 | struct sock *sk; | |
234 | int err; | |
235 | ||
ba4e58ec GR |
236 | sk = __udp6_lib_lookup(daddr, uh->dest, |
237 | saddr, uh->source, inet6_iif(skb), udptable); | |
1da177e4 LT |
238 | if (sk == NULL) |
239 | return; | |
240 | ||
241 | np = inet6_sk(sk); | |
242 | ||
243 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
244 | goto out; | |
245 | ||
246 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
247 | goto out; | |
248 | ||
249 | if (np->recverr) | |
250 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
251 | ||
252 | sk->sk_err = err; | |
253 | sk->sk_error_report(sk); | |
254 | out: | |
255 | sock_put(sk); | |
256 | } | |
257 | ||
ba4e58ec GR |
258 | static __inline__ void udpv6_err(struct sk_buff *skb, |
259 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 260 | int code, int offset, __be32 info ) |
ba4e58ec | 261 | { |
77d0d350 | 262 | __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash); |
ba4e58ec GR |
263 | } |
264 | ||
265 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 266 | { |
ba4e58ec | 267 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 268 | int rc; |
b2bf1e26 | 269 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 270 | |
ba4e58ec GR |
271 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
272 | goto drop; | |
1da177e4 | 273 | |
ba4e58ec GR |
274 | /* |
275 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
276 | */ | |
b2bf1e26 | 277 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
278 | |
279 | if (up->pcrlen == 0) { /* full coverage was set */ | |
280 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
281 | " %d while full coverage %d requested\n", | |
282 | UDP_SKB_CB(skb)->cscov, skb->len); | |
283 | goto drop; | |
284 | } | |
285 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
286 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
287 | "too small, need min %d\n", | |
288 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
289 | goto drop; | |
290 | } | |
1da177e4 LT |
291 | } |
292 | ||
1ab6eb62 HX |
293 | if (sk->sk_filter) { |
294 | if (udp_lib_checksum_complete(skb)) | |
295 | goto drop; | |
296 | } | |
ba4e58ec | 297 | |
a18135eb DM |
298 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
299 | /* Note that an ENOMEM error is charged twice */ | |
300 | if (rc == -ENOMEM) | |
b2bf1e26 | 301 | UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, is_udplite); |
ba4e58ec | 302 | goto drop; |
1da177e4 | 303 | } |
cb75994e | 304 | |
1da177e4 | 305 | return 0; |
ba4e58ec | 306 | drop: |
b2bf1e26 | 307 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
308 | kfree_skb(skb); |
309 | return -1; | |
1da177e4 LT |
310 | } |
311 | ||
312 | static struct sock *udp_v6_mcast_next(struct sock *sk, | |
e69a4adc AV |
313 | __be16 loc_port, struct in6_addr *loc_addr, |
314 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
315 | int dif) |
316 | { | |
317 | struct hlist_node *node; | |
318 | struct sock *s = sk; | |
319 | unsigned short num = ntohs(loc_port); | |
320 | ||
321 | sk_for_each_from(s, node) { | |
322 | struct inet_sock *inet = inet_sk(s); | |
323 | ||
95f30b33 | 324 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
325 | struct ipv6_pinfo *np = inet6_sk(s); |
326 | if (inet->dport) { | |
327 | if (inet->dport != rmt_port) | |
328 | continue; | |
329 | } | |
330 | if (!ipv6_addr_any(&np->daddr) && | |
331 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
332 | continue; | |
333 | ||
334 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
335 | continue; | |
336 | ||
337 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
338 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
339 | continue; | |
1da177e4 | 340 | } |
add459aa | 341 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
342 | continue; |
343 | return s; | |
344 | } | |
345 | } | |
346 | return NULL; | |
347 | } | |
348 | ||
349 | /* | |
350 | * Note: called only from the BH handler context, | |
351 | * so we don't need to lock the hashes. | |
352 | */ | |
ba4e58ec | 353 | static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr, |
1ab1457c | 354 | struct in6_addr *daddr, struct hlist_head udptable[]) |
1da177e4 LT |
355 | { |
356 | struct sock *sk, *sk2; | |
4bedb452 | 357 | const struct udphdr *uh = udp_hdr(skb); |
1da177e4 LT |
358 | int dif; |
359 | ||
360 | read_lock(&udp_hash_lock); | |
ba4e58ec | 361 | sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]); |
f2776ff0 | 362 | dif = inet6_iif(skb); |
1da177e4 LT |
363 | sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif); |
364 | if (!sk) { | |
365 | kfree_skb(skb); | |
366 | goto out; | |
367 | } | |
368 | ||
369 | sk2 = sk; | |
370 | while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr, | |
371 | uh->source, saddr, dif))) { | |
372 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
95766fff HA |
373 | if (buff) { |
374 | bh_lock_sock_nested(sk2); | |
375 | if (!sock_owned_by_user(sk2)) | |
376 | udpv6_queue_rcv_skb(sk2, buff); | |
377 | else | |
378 | sk_add_backlog(sk2, buff); | |
379 | bh_unlock_sock(sk2); | |
380 | } | |
1da177e4 | 381 | } |
95766fff HA |
382 | bh_lock_sock_nested(sk); |
383 | if (!sock_owned_by_user(sk)) | |
384 | udpv6_queue_rcv_skb(sk, skb); | |
385 | else | |
386 | sk_add_backlog(sk, skb); | |
387 | bh_unlock_sock(sk); | |
1da177e4 LT |
388 | out: |
389 | read_unlock(&udp_hash_lock); | |
ba4e58ec | 390 | return 0; |
1da177e4 LT |
391 | } |
392 | ||
759e5d00 HX |
393 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
394 | int proto) | |
ba4e58ec | 395 | { |
759e5d00 HX |
396 | int err; |
397 | ||
398 | UDP_SKB_CB(skb)->partial_cov = 0; | |
399 | UDP_SKB_CB(skb)->cscov = skb->len; | |
400 | ||
401 | if (proto == IPPROTO_UDPLITE) { | |
402 | err = udplite_checksum_init(skb, uh); | |
403 | if (err) | |
404 | return err; | |
405 | } | |
406 | ||
ba4e58ec GR |
407 | if (uh->check == 0) { |
408 | /* RFC 2460 section 8.1 says that we SHOULD log | |
409 | this error. Well, it is reasonable. | |
410 | */ | |
411 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
412 | return 1; | |
413 | } | |
414 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 415 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 416 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
417 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
418 | ||
60476372 | 419 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
420 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
421 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 422 | skb->len, proto, 0)); |
ba4e58ec | 423 | |
759e5d00 | 424 | return 0; |
ba4e58ec GR |
425 | } |
426 | ||
e5bbef20 | 427 | int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[], |
759e5d00 | 428 | int proto) |
1da177e4 | 429 | { |
1da177e4 | 430 | struct sock *sk; |
1ab1457c | 431 | struct udphdr *uh; |
1da177e4 LT |
432 | struct net_device *dev = skb->dev; |
433 | struct in6_addr *saddr, *daddr; | |
434 | u32 ulen = 0; | |
435 | ||
436 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
437 | goto short_packet; | |
438 | ||
0660e03f ACM |
439 | saddr = &ipv6_hdr(skb)->saddr; |
440 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 441 | uh = udp_hdr(skb); |
1da177e4 LT |
442 | |
443 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
444 | if (ulen > skb->len) |
445 | goto short_packet; | |
1da177e4 | 446 | |
759e5d00 HX |
447 | if (proto == IPPROTO_UDP) { |
448 | /* UDP validates ulen. */ | |
1da177e4 | 449 | |
ba4e58ec GR |
450 | /* Check for jumbo payload */ |
451 | if (ulen == 0) | |
452 | ulen = skb->len; | |
1da177e4 | 453 | |
ba4e58ec GR |
454 | if (ulen < sizeof(*uh)) |
455 | goto short_packet; | |
1da177e4 | 456 | |
ba4e58ec GR |
457 | if (ulen < skb->len) { |
458 | if (pskb_trim_rcsum(skb, ulen)) | |
459 | goto short_packet; | |
0660e03f ACM |
460 | saddr = &ipv6_hdr(skb)->saddr; |
461 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 462 | uh = udp_hdr(skb); |
ba4e58ec | 463 | } |
ba4e58ec | 464 | } |
1da177e4 | 465 | |
759e5d00 HX |
466 | if (udp6_csum_init(skb, uh, proto)) |
467 | goto discard; | |
468 | ||
1ab1457c YH |
469 | /* |
470 | * Multicast receive code | |
1da177e4 | 471 | */ |
ba4e58ec GR |
472 | if (ipv6_addr_is_multicast(daddr)) |
473 | return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable); | |
1da177e4 LT |
474 | |
475 | /* Unicast */ | |
476 | ||
1ab1457c | 477 | /* |
1da177e4 LT |
478 | * check socket cache ... must talk to Alan about his plans |
479 | * for sock caches... i'll skip this for now. | |
480 | */ | |
ba4e58ec GR |
481 | sk = __udp6_lib_lookup(saddr, uh->source, |
482 | daddr, uh->dest, inet6_iif(skb), udptable); | |
1da177e4 LT |
483 | |
484 | if (sk == NULL) { | |
485 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
486 | goto discard; | |
487 | ||
ba4e58ec | 488 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 489 | goto discard; |
759e5d00 | 490 | UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); |
1da177e4 LT |
491 | |
492 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
493 | ||
494 | kfree_skb(skb); | |
add459aa | 495 | return 0; |
1da177e4 | 496 | } |
1ab1457c | 497 | |
1da177e4 | 498 | /* deliver */ |
1ab1457c | 499 | |
95766fff HA |
500 | bh_lock_sock_nested(sk); |
501 | if (!sock_owned_by_user(sk)) | |
502 | udpv6_queue_rcv_skb(sk, skb); | |
503 | else | |
504 | sk_add_backlog(sk, skb); | |
505 | bh_unlock_sock(sk); | |
1da177e4 | 506 | sock_put(sk); |
add459aa | 507 | return 0; |
1da177e4 | 508 | |
1ab1457c | 509 | short_packet: |
ba4e58ec | 510 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
759e5d00 HX |
511 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
512 | ulen, skb->len); | |
1da177e4 LT |
513 | |
514 | discard: | |
759e5d00 | 515 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 516 | kfree_skb(skb); |
add459aa | 517 | return 0; |
1da177e4 | 518 | } |
ba4e58ec | 519 | |
e5bbef20 | 520 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 521 | { |
e5bbef20 | 522 | return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP); |
ba4e58ec GR |
523 | } |
524 | ||
1da177e4 LT |
525 | /* |
526 | * Throw away all pending data and cancel the corking. Socket is locked. | |
527 | */ | |
528 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
529 | { | |
530 | struct udp_sock *up = udp_sk(sk); | |
531 | ||
532 | if (up->pending) { | |
533 | up->len = 0; | |
534 | up->pending = 0; | |
535 | ip6_flush_pending_frames(sk); | |
1ab1457c | 536 | } |
1da177e4 LT |
537 | } |
538 | ||
539 | /* | |
540 | * Sending | |
541 | */ | |
542 | ||
4c0a6cb0 | 543 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
544 | { |
545 | struct sk_buff *skb; | |
546 | struct udphdr *uh; | |
4c0a6cb0 | 547 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
548 | struct inet_sock *inet = inet_sk(sk); |
549 | struct flowi *fl = &inet->cork.fl; | |
550 | int err = 0; | |
b2bf1e26 | 551 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 552 | __wsum csum = 0; |
1da177e4 LT |
553 | |
554 | /* Grab the skbuff where UDP header space exists. */ | |
555 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
556 | goto out; | |
557 | ||
558 | /* | |
559 | * Create a UDP header | |
560 | */ | |
4bedb452 | 561 | uh = udp_hdr(skb); |
1da177e4 LT |
562 | uh->source = fl->fl_ip_sport; |
563 | uh->dest = fl->fl_ip_dport; | |
564 | uh->len = htons(up->len); | |
565 | uh->check = 0; | |
566 | ||
b2bf1e26 | 567 | if (is_udplite) |
ba4e58ec GR |
568 | csum = udplite_csum_outgoing(sk, skb); |
569 | else | |
570 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 571 | |
ba4e58ec GR |
572 | /* add protocol-dependent pseudo-header */ |
573 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
574 | up->len, fl->proto, csum ); | |
1da177e4 | 575 | if (uh->check == 0) |
f6ab0288 | 576 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 577 | |
1da177e4 LT |
578 | err = ip6_push_pending_frames(sk); |
579 | out: | |
580 | up->len = 0; | |
581 | up->pending = 0; | |
cd562c98 | 582 | if (!err) |
b2bf1e26 | 583 | UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite); |
1da177e4 LT |
584 | return err; |
585 | } | |
586 | ||
ba4e58ec | 587 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
588 | struct msghdr *msg, size_t len) |
589 | { | |
590 | struct ipv6_txoptions opt_space; | |
591 | struct udp_sock *up = udp_sk(sk); | |
592 | struct inet_sock *inet = inet_sk(sk); | |
593 | struct ipv6_pinfo *np = inet6_sk(sk); | |
594 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
595 | struct in6_addr *daddr, *final_p = NULL, final; | |
596 | struct ipv6_txoptions *opt = NULL; | |
597 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 598 | struct flowi fl; |
1da177e4 LT |
599 | struct dst_entry *dst; |
600 | int addr_len = msg->msg_namelen; | |
601 | int ulen = len; | |
602 | int hlimit = -1; | |
41a1f8ea | 603 | int tclass = -1; |
1da177e4 LT |
604 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
605 | int err; | |
987905de | 606 | int connected = 0; |
b2bf1e26 | 607 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 608 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
609 | |
610 | /* destination address check */ | |
611 | if (sin6) { | |
612 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
613 | return -EINVAL; | |
614 | ||
615 | switch (sin6->sin6_family) { | |
616 | case AF_INET6: | |
617 | if (addr_len < SIN6_LEN_RFC2133) | |
618 | return -EINVAL; | |
619 | daddr = &sin6->sin6_addr; | |
620 | break; | |
621 | case AF_INET: | |
622 | goto do_udp_sendmsg; | |
623 | case AF_UNSPEC: | |
624 | msg->msg_name = sin6 = NULL; | |
625 | msg->msg_namelen = addr_len = 0; | |
626 | daddr = NULL; | |
627 | break; | |
628 | default: | |
629 | return -EINVAL; | |
630 | } | |
631 | } else if (!up->pending) { | |
632 | if (sk->sk_state != TCP_ESTABLISHED) | |
633 | return -EDESTADDRREQ; | |
634 | daddr = &np->daddr; | |
1ab1457c | 635 | } else |
1da177e4 LT |
636 | daddr = NULL; |
637 | ||
638 | if (daddr) { | |
e773e4fa | 639 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
640 | struct sockaddr_in sin; |
641 | sin.sin_family = AF_INET; | |
642 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
643 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
644 | msg->msg_name = &sin; | |
645 | msg->msg_namelen = sizeof(sin); | |
646 | do_udp_sendmsg: | |
647 | if (__ipv6_only_sock(sk)) | |
648 | return -ENETUNREACH; | |
649 | return udp_sendmsg(iocb, sk, msg, len); | |
650 | } | |
651 | } | |
652 | ||
653 | if (up->pending == AF_INET) | |
654 | return udp_sendmsg(iocb, sk, msg, len); | |
655 | ||
656 | /* Rough check on arithmetic overflow, | |
b59e139b | 657 | better check is made in ip6_append_data(). |
1da177e4 LT |
658 | */ |
659 | if (len > INT_MAX - sizeof(struct udphdr)) | |
660 | return -EMSGSIZE; | |
1ab1457c | 661 | |
1da177e4 LT |
662 | if (up->pending) { |
663 | /* | |
664 | * There are pending frames. | |
665 | * The socket lock must be held while it's corked. | |
666 | */ | |
667 | lock_sock(sk); | |
668 | if (likely(up->pending)) { | |
669 | if (unlikely(up->pending != AF_INET6)) { | |
670 | release_sock(sk); | |
671 | return -EAFNOSUPPORT; | |
672 | } | |
673 | dst = NULL; | |
674 | goto do_append_data; | |
675 | } | |
676 | release_sock(sk); | |
677 | } | |
678 | ulen += sizeof(struct udphdr); | |
679 | ||
132a55f3 | 680 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
681 | |
682 | if (sin6) { | |
683 | if (sin6->sin6_port == 0) | |
684 | return -EINVAL; | |
685 | ||
132a55f3 | 686 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
687 | daddr = &sin6->sin6_addr; |
688 | ||
689 | if (np->sndflow) { | |
132a55f3 HX |
690 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
691 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
692 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
693 | if (flowlabel == NULL) |
694 | return -EINVAL; | |
695 | daddr = &flowlabel->dst; | |
696 | } | |
697 | } | |
698 | ||
699 | /* | |
700 | * Otherwise it will be difficult to maintain | |
701 | * sk->sk_dst_cache. | |
702 | */ | |
703 | if (sk->sk_state == TCP_ESTABLISHED && | |
704 | ipv6_addr_equal(daddr, &np->daddr)) | |
705 | daddr = &np->daddr; | |
706 | ||
707 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
708 | sin6->sin6_scope_id && | |
709 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 710 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
711 | } else { |
712 | if (sk->sk_state != TCP_ESTABLISHED) | |
713 | return -EDESTADDRREQ; | |
714 | ||
132a55f3 | 715 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 716 | daddr = &np->daddr; |
132a55f3 | 717 | fl.fl6_flowlabel = np->flow_label; |
987905de | 718 | connected = 1; |
1da177e4 LT |
719 | } |
720 | ||
132a55f3 HX |
721 | if (!fl.oif) |
722 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
723 | |
724 | if (msg->msg_controllen) { | |
725 | opt = &opt_space; | |
726 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
727 | opt->tot_len = sizeof(*opt); | |
728 | ||
132a55f3 | 729 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
730 | if (err < 0) { |
731 | fl6_sock_release(flowlabel); | |
732 | return err; | |
733 | } | |
132a55f3 HX |
734 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
735 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
736 | if (flowlabel == NULL) |
737 | return -EINVAL; | |
738 | } | |
739 | if (!(opt->opt_nflen|opt->opt_flen)) | |
740 | opt = NULL; | |
987905de | 741 | connected = 0; |
1da177e4 LT |
742 | } |
743 | if (opt == NULL) | |
744 | opt = np->opt; | |
df9890c3 YH |
745 | if (flowlabel) |
746 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
747 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 748 | |
ba4e58ec | 749 | fl.proto = sk->sk_protocol; |
132a55f3 HX |
750 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
751 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
752 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
753 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 754 | |
1da177e4 LT |
755 | /* merge ip6_build_xmit from ip6_output */ |
756 | if (opt && opt->srcrt) { | |
757 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
758 | ipv6_addr_copy(&final, &fl.fl6_dst); |
759 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 760 | final_p = &final; |
987905de | 761 | connected = 0; |
1da177e4 LT |
762 | } |
763 | ||
132a55f3 HX |
764 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
765 | fl.oif = np->mcast_oif; | |
987905de MK |
766 | connected = 0; |
767 | } | |
1da177e4 | 768 | |
132a55f3 | 769 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 770 | |
132a55f3 | 771 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
772 | if (err) |
773 | goto out; | |
774 | if (final_p) | |
132a55f3 | 775 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 776 | |
bb72845e | 777 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
778 | if (err == -EREMOTE) |
779 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
780 | if (err < 0) | |
781 | goto out; | |
782 | } | |
1da177e4 LT |
783 | |
784 | if (hlimit < 0) { | |
132a55f3 | 785 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
786 | hlimit = np->mcast_hops; |
787 | else | |
788 | hlimit = np->hop_limit; | |
789 | if (hlimit < 0) | |
790 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
791 | if (hlimit < 0) | |
792 | hlimit = ipv6_get_hoplimit(dst->dev); | |
793 | } | |
794 | ||
41a1f8ea YH |
795 | if (tclass < 0) { |
796 | tclass = np->tclass; | |
797 | if (tclass < 0) | |
798 | tclass = 0; | |
799 | } | |
800 | ||
1da177e4 LT |
801 | if (msg->msg_flags&MSG_CONFIRM) |
802 | goto do_confirm; | |
803 | back_from_confirm: | |
804 | ||
805 | lock_sock(sk); | |
806 | if (unlikely(up->pending)) { | |
807 | /* The socket is already corked while preparing it. */ | |
808 | /* ... which is an evident application bug. --ANK */ | |
809 | release_sock(sk); | |
810 | ||
64ce2073 | 811 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
812 | err = -EINVAL; |
813 | goto out; | |
814 | } | |
815 | ||
816 | up->pending = AF_INET6; | |
817 | ||
818 | do_append_data: | |
819 | up->len += ulen; | |
ba4e58ec GR |
820 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
821 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 822 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
823 | (struct rt6_info*)dst, |
824 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
825 | if (err) |
826 | udp_v6_flush_pending_frames(sk); | |
827 | else if (!corkreq) | |
4c0a6cb0 | 828 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
829 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
830 | up->pending = 0; | |
1da177e4 | 831 | |
a5e7c210 DM |
832 | if (dst) { |
833 | if (connected) { | |
834 | ip6_dst_store(sk, dst, | |
132a55f3 | 835 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
836 | &np->daddr : NULL, |
837 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 838 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
839 | &np->saddr : |
840 | #endif | |
841 | NULL); | |
a5e7c210 DM |
842 | } else { |
843 | dst_release(dst); | |
844 | } | |
845 | } | |
846 | ||
1da177e4 LT |
847 | if (err > 0) |
848 | err = np->recverr ? net_xmit_errno(err) : 0; | |
849 | release_sock(sk); | |
850 | out: | |
851 | fl6_sock_release(flowlabel); | |
cd562c98 | 852 | if (!err) |
1da177e4 | 853 | return len; |
a18135eb DM |
854 | /* |
855 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
856 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
857 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
858 | * things). We could add another new stat but at least for now that | |
859 | * seems like overkill. | |
860 | */ | |
861 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
ba4e58ec | 862 | UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite); |
a18135eb | 863 | } |
1da177e4 LT |
864 | return err; |
865 | ||
866 | do_confirm: | |
867 | dst_confirm(dst); | |
868 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
869 | goto back_from_confirm; | |
870 | err = 0; | |
871 | goto out; | |
872 | } | |
873 | ||
ba4e58ec | 874 | int udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
875 | { |
876 | lock_sock(sk); | |
877 | udp_v6_flush_pending_frames(sk); | |
878 | release_sock(sk); | |
879 | ||
880 | inet6_destroy_sock(sk); | |
881 | ||
882 | return 0; | |
883 | } | |
884 | ||
885 | /* | |
886 | * Socket option code for UDP | |
887 | */ | |
ba4e58ec GR |
888 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
889 | char __user *optval, int optlen) | |
3fdadf7d | 890 | { |
ba4e58ec | 891 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
892 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
893 | udp_v6_push_pending_frames); | |
ba4e58ec | 894 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
895 | } |
896 | ||
897 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
898 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
899 | char __user *optval, int optlen) | |
3fdadf7d | 900 | { |
ba4e58ec | 901 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
902 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
903 | udp_v6_push_pending_frames); | |
ba4e58ec | 904 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
905 | } |
906 | #endif | |
907 | ||
ba4e58ec GR |
908 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
909 | char __user *optval, int __user *optlen) | |
3fdadf7d | 910 | { |
ba4e58ec | 911 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 912 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 913 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
914 | } |
915 | ||
916 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
917 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
918 | char __user *optval, int __user *optlen) | |
3fdadf7d | 919 | { |
ba4e58ec | 920 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 921 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 922 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
923 | } |
924 | #endif | |
925 | ||
1da177e4 LT |
926 | static struct inet6_protocol udpv6_protocol = { |
927 | .handler = udpv6_rcv, | |
928 | .err_handler = udpv6_err, | |
929 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
930 | }; | |
931 | ||
932 | /* ------------------------------------------------------------------------ */ | |
933 | #ifdef CONFIG_PROC_FS | |
934 | ||
935 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
936 | { | |
937 | struct inet_sock *inet = inet_sk(sp); | |
938 | struct ipv6_pinfo *np = inet6_sk(sp); | |
939 | struct in6_addr *dest, *src; | |
940 | __u16 destp, srcp; | |
941 | ||
942 | dest = &np->daddr; | |
943 | src = &np->rcv_saddr; | |
944 | destp = ntohs(inet->dport); | |
945 | srcp = ntohs(inet->sport); | |
946 | seq_printf(seq, | |
947 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
948 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
949 | bucket, | |
950 | src->s6_addr32[0], src->s6_addr32[1], | |
951 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
952 | dest->s6_addr32[0], dest->s6_addr32[1], | |
953 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 954 | sp->sk_state, |
1da177e4 LT |
955 | atomic_read(&sp->sk_wmem_alloc), |
956 | atomic_read(&sp->sk_rmem_alloc), | |
957 | 0, 0L, 0, | |
958 | sock_i_uid(sp), 0, | |
959 | sock_i_ino(sp), | |
960 | atomic_read(&sp->sk_refcnt), sp); | |
961 | } | |
962 | ||
ba4e58ec | 963 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
964 | { |
965 | if (v == SEQ_START_TOKEN) | |
966 | seq_printf(seq, | |
967 | " sl " | |
968 | "local_address " | |
969 | "remote_address " | |
970 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
971 | " uid timeout inode\n"); | |
972 | else | |
973 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
974 | return 0; | |
975 | } | |
976 | ||
977 | static struct file_operations udp6_seq_fops; | |
978 | static struct udp_seq_afinfo udp6_seq_afinfo = { | |
979 | .owner = THIS_MODULE, | |
980 | .name = "udp6", | |
981 | .family = AF_INET6, | |
ba4e58ec | 982 | .hashtable = udp_hash, |
1da177e4 LT |
983 | .seq_show = udp6_seq_show, |
984 | .seq_fops = &udp6_seq_fops, | |
985 | }; | |
986 | ||
987 | int __init udp6_proc_init(void) | |
988 | { | |
989 | return udp_proc_register(&udp6_seq_afinfo); | |
990 | } | |
991 | ||
992 | void udp6_proc_exit(void) { | |
993 | udp_proc_unregister(&udp6_seq_afinfo); | |
994 | } | |
995 | #endif /* CONFIG_PROC_FS */ | |
996 | ||
997 | /* ------------------------------------------------------------------------ */ | |
998 | ||
c5a432f1 ED |
999 | DEFINE_PROTO_INUSE(udpv6) |
1000 | ||
1da177e4 | 1001 | struct proto udpv6_prot = { |
543d9cfe ACM |
1002 | .name = "UDPv6", |
1003 | .owner = THIS_MODULE, | |
ba4e58ec | 1004 | .close = udp_lib_close, |
543d9cfe ACM |
1005 | .connect = ip6_datagram_connect, |
1006 | .disconnect = udp_disconnect, | |
1007 | .ioctl = udp_ioctl, | |
1008 | .destroy = udpv6_destroy_sock, | |
1009 | .setsockopt = udpv6_setsockopt, | |
1010 | .getsockopt = udpv6_getsockopt, | |
1011 | .sendmsg = udpv6_sendmsg, | |
1012 | .recvmsg = udpv6_recvmsg, | |
1013 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1014 | .hash = udp_lib_hash, |
1015 | .unhash = udp_lib_unhash, | |
543d9cfe | 1016 | .get_port = udp_v6_get_port, |
95766fff HA |
1017 | .memory_allocated = &udp_memory_allocated, |
1018 | .sysctl_mem = sysctl_udp_mem, | |
1019 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1020 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1021 | .obj_size = sizeof(struct udp6_sock), |
3fdadf7d | 1022 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1023 | .compat_setsockopt = compat_udpv6_setsockopt, |
1024 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1025 | #endif |
c5a432f1 | 1026 | REF_PROTO_INUSE(udpv6) |
1da177e4 LT |
1027 | }; |
1028 | ||
1da177e4 LT |
1029 | static struct inet_protosw udpv6_protosw = { |
1030 | .type = SOCK_DGRAM, | |
1031 | .protocol = IPPROTO_UDP, | |
1032 | .prot = &udpv6_prot, | |
1033 | .ops = &inet6_dgram_ops, | |
1034 | .capability =-1, | |
1035 | .no_check = UDP_CSUM_DEFAULT, | |
1036 | .flags = INET_PROTOSW_PERMANENT, | |
1037 | }; | |
1038 | ||
1039 | ||
7f4e4868 | 1040 | int __init udpv6_init(void) |
1da177e4 | 1041 | { |
7f4e4868 DL |
1042 | int ret; |
1043 | ||
1044 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1045 | if (ret) | |
1046 | goto out; | |
1047 | ||
1048 | ret = inet6_register_protosw(&udpv6_protosw); | |
1049 | if (ret) | |
1050 | goto out_udpv6_protocol; | |
1051 | out: | |
1052 | return ret; | |
1053 | ||
1054 | out_udpv6_protocol: | |
1055 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1056 | goto out; | |
1057 | } | |
1058 | ||
09f7709f | 1059 | void udpv6_exit(void) |
7f4e4868 DL |
1060 | { |
1061 | inet6_unregister_protosw(&udpv6_protosw); | |
1062 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1063 | } |