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> | |
3305b80c | 37 | #include <linux/skbuff.h> |
1da177e4 LT |
38 | #include <asm/uaccess.h> |
39 | ||
1da177e4 LT |
40 | #include <net/ndisc.h> |
41 | #include <net/protocol.h> | |
42 | #include <net/transp_v6.h> | |
43 | #include <net/ip6_route.h> | |
1da177e4 | 44 | #include <net/raw.h> |
c752f073 | 45 | #include <net/tcp_states.h> |
1da177e4 LT |
46 | #include <net/ip6_checksum.h> |
47 | #include <net/xfrm.h> | |
48 | ||
49 | #include <linux/proc_fs.h> | |
50 | #include <linux/seq_file.h> | |
ba4e58ec | 51 | #include "udp_impl.h" |
1da177e4 | 52 | |
ba89966c | 53 | DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly; |
1da177e4 | 54 | |
fc038410 DM |
55 | static int ipv6_rcv_saddr_any(const struct sock *sk) |
56 | { | |
57 | struct ipv6_pinfo *np = inet6_sk(sk); | |
58 | ||
59 | return ipv6_addr_any(&np->rcv_saddr); | |
60 | } | |
61 | ||
62 | static unsigned int ipv6_hash_port_and_rcv_saddr(__u16 port, | |
63 | const struct sock *sk) | |
64 | { | |
65 | return port; | |
66 | } | |
67 | ||
68 | const struct udp_get_port_ops udp_ipv6_ops = { | |
69 | .saddr_cmp = ipv6_rcv_saddr_equal, | |
70 | .saddr_any = ipv6_rcv_saddr_any, | |
71 | .hash_port_and_rcv_saddr = ipv6_hash_port_and_rcv_saddr, | |
72 | }; | |
73 | ||
25030a7f | 74 | static inline int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 75 | { |
fc038410 | 76 | return udp_get_port(sk, snum, &udp_ipv6_ops); |
1da177e4 LT |
77 | } |
78 | ||
ba4e58ec GR |
79 | static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport, |
80 | struct in6_addr *daddr, __be16 dport, | |
81 | int dif, struct hlist_head udptable[]) | |
1da177e4 LT |
82 | { |
83 | struct sock *sk, *result = NULL; | |
84 | struct hlist_node *node; | |
85 | unsigned short hnum = ntohs(dport); | |
86 | int badness = -1; | |
87 | ||
1ab1457c | 88 | read_lock(&udp_hash_lock); |
ba4e58ec | 89 | sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) { |
1da177e4 LT |
90 | struct inet_sock *inet = inet_sk(sk); |
91 | ||
95f30b33 | 92 | if (sk->sk_hash == hnum && sk->sk_family == PF_INET6) { |
1da177e4 LT |
93 | struct ipv6_pinfo *np = inet6_sk(sk); |
94 | int score = 0; | |
95 | if (inet->dport) { | |
96 | if (inet->dport != sport) | |
97 | continue; | |
98 | score++; | |
99 | } | |
100 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
101 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
102 | continue; | |
103 | score++; | |
104 | } | |
105 | if (!ipv6_addr_any(&np->daddr)) { | |
106 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
107 | continue; | |
108 | score++; | |
109 | } | |
110 | if (sk->sk_bound_dev_if) { | |
111 | if (sk->sk_bound_dev_if != dif) | |
112 | continue; | |
113 | score++; | |
114 | } | |
add459aa | 115 | if (score == 4) { |
1da177e4 LT |
116 | result = sk; |
117 | break; | |
add459aa | 118 | } else if (score > badness) { |
1da177e4 LT |
119 | result = sk; |
120 | badness = score; | |
121 | } | |
122 | } | |
123 | } | |
124 | if (result) | |
125 | sock_hold(result); | |
1ab1457c | 126 | read_unlock(&udp_hash_lock); |
1da177e4 LT |
127 | return result; |
128 | } | |
129 | ||
1da177e4 LT |
130 | /* |
131 | * This should be easy, if there is something there we | |
132 | * return it, otherwise we block. | |
133 | */ | |
134 | ||
ba4e58ec | 135 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
136 | struct msghdr *msg, size_t len, |
137 | int noblock, int flags, int *addr_len) | |
138 | { | |
139 | struct ipv6_pinfo *np = inet6_sk(sk); | |
140 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 141 | struct sk_buff *skb; |
759e5d00 HX |
142 | unsigned int ulen, copied; |
143 | int err; | |
144 | int is_udplite = IS_UDPLITE(sk); | |
1da177e4 | 145 | |
1ab1457c YH |
146 | if (addr_len) |
147 | *addr_len=sizeof(struct sockaddr_in6); | |
148 | ||
1da177e4 LT |
149 | if (flags & MSG_ERRQUEUE) |
150 | return ipv6_recv_error(sk, msg, len); | |
151 | ||
152 | try_again: | |
153 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
154 | if (!skb) | |
155 | goto out; | |
156 | ||
759e5d00 HX |
157 | ulen = skb->len - sizeof(struct udphdr); |
158 | copied = len; | |
159 | if (copied > ulen) | |
160 | copied = ulen; | |
161 | else if (copied < ulen) | |
1ab1457c | 162 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 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 | ||
186 | sock_recv_timestamp(msg, sk, skb); | |
187 | ||
188 | /* Copy the address. */ | |
189 | if (msg->msg_name) { | |
190 | struct sockaddr_in6 *sin6; | |
1ab1457c | 191 | |
1da177e4 LT |
192 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
193 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 194 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
195 | sin6->sin6_flowinfo = 0; |
196 | sin6->sin6_scope_id = 0; | |
197 | ||
198 | if (skb->protocol == htons(ETH_P_IP)) | |
199 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, | |
eddc9ec5 | 200 | htonl(0xffff), ip_hdr(skb)->saddr); |
1da177e4 | 201 | else { |
0660e03f ACM |
202 | ipv6_addr_copy(&sin6->sin6_addr, |
203 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
204 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
205 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
206 | } | |
207 | ||
208 | } | |
209 | if (skb->protocol == htons(ETH_P_IP)) { | |
210 | if (inet->cmsg_flags) | |
211 | ip_cmsg_recv(msg, skb); | |
212 | } else { | |
213 | if (np->rxopt.all) | |
214 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 215 | } |
1da177e4 LT |
216 | |
217 | err = copied; | |
218 | if (flags & MSG_TRUNC) | |
759e5d00 | 219 | err = ulen; |
1da177e4 LT |
220 | |
221 | out_free: | |
222 | skb_free_datagram(sk, skb); | |
223 | out: | |
224 | return err; | |
225 | ||
226 | csum_copy_err: | |
3305b80c | 227 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
228 | |
229 | if (flags & MSG_DONTWAIT) { | |
ba4e58ec | 230 | UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite); |
1da177e4 LT |
231 | return -EAGAIN; |
232 | } | |
233 | goto try_again; | |
234 | } | |
235 | ||
ba4e58ec GR |
236 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
237 | int type, int code, int offset, __be32 info, | |
238 | struct hlist_head udptable[] ) | |
1da177e4 LT |
239 | { |
240 | struct ipv6_pinfo *np; | |
241 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
242 | struct in6_addr *saddr = &hdr->saddr; |
243 | struct in6_addr *daddr = &hdr->daddr; | |
244 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
245 | struct sock *sk; | |
246 | int err; | |
247 | ||
ba4e58ec GR |
248 | sk = __udp6_lib_lookup(daddr, uh->dest, |
249 | saddr, uh->source, inet6_iif(skb), udptable); | |
1da177e4 LT |
250 | if (sk == NULL) |
251 | return; | |
252 | ||
253 | np = inet6_sk(sk); | |
254 | ||
255 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
256 | goto out; | |
257 | ||
258 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
259 | goto out; | |
260 | ||
261 | if (np->recverr) | |
262 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
263 | ||
264 | sk->sk_err = err; | |
265 | sk->sk_error_report(sk); | |
266 | out: | |
267 | sock_put(sk); | |
268 | } | |
269 | ||
ba4e58ec GR |
270 | static __inline__ void udpv6_err(struct sk_buff *skb, |
271 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 272 | int code, int offset, __be32 info ) |
ba4e58ec GR |
273 | { |
274 | return __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash); | |
275 | } | |
276 | ||
277 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 278 | { |
ba4e58ec | 279 | struct udp_sock *up = udp_sk(sk); |
a18135eb DM |
280 | int rc; |
281 | ||
ba4e58ec GR |
282 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
283 | goto drop; | |
1da177e4 | 284 | |
ba4e58ec GR |
285 | /* |
286 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
287 | */ | |
288 | if ((up->pcflag & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { | |
289 | ||
290 | if (up->pcrlen == 0) { /* full coverage was set */ | |
291 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
292 | " %d while full coverage %d requested\n", | |
293 | UDP_SKB_CB(skb)->cscov, skb->len); | |
294 | goto drop; | |
295 | } | |
296 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
297 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
298 | "too small, need min %d\n", | |
299 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
300 | goto drop; | |
301 | } | |
1da177e4 LT |
302 | } |
303 | ||
1ab6eb62 HX |
304 | if (sk->sk_filter) { |
305 | if (udp_lib_checksum_complete(skb)) | |
306 | goto drop; | |
307 | } | |
ba4e58ec | 308 | |
a18135eb DM |
309 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
310 | /* Note that an ENOMEM error is charged twice */ | |
311 | if (rc == -ENOMEM) | |
ba4e58ec GR |
312 | UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, up->pcflag); |
313 | goto drop; | |
1da177e4 | 314 | } |
ba4e58ec | 315 | UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag); |
1da177e4 | 316 | return 0; |
ba4e58ec GR |
317 | drop: |
318 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag); | |
319 | kfree_skb(skb); | |
320 | return -1; | |
1da177e4 LT |
321 | } |
322 | ||
323 | static struct sock *udp_v6_mcast_next(struct sock *sk, | |
e69a4adc AV |
324 | __be16 loc_port, struct in6_addr *loc_addr, |
325 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
326 | int dif) |
327 | { | |
328 | struct hlist_node *node; | |
329 | struct sock *s = sk; | |
330 | unsigned short num = ntohs(loc_port); | |
331 | ||
332 | sk_for_each_from(s, node) { | |
333 | struct inet_sock *inet = inet_sk(s); | |
334 | ||
95f30b33 | 335 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
336 | struct ipv6_pinfo *np = inet6_sk(s); |
337 | if (inet->dport) { | |
338 | if (inet->dport != rmt_port) | |
339 | continue; | |
340 | } | |
341 | if (!ipv6_addr_any(&np->daddr) && | |
342 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
343 | continue; | |
344 | ||
345 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
346 | continue; | |
347 | ||
348 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
349 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
350 | continue; | |
1da177e4 | 351 | } |
add459aa | 352 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
353 | continue; |
354 | return s; | |
355 | } | |
356 | } | |
357 | return NULL; | |
358 | } | |
359 | ||
360 | /* | |
361 | * Note: called only from the BH handler context, | |
362 | * so we don't need to lock the hashes. | |
363 | */ | |
ba4e58ec | 364 | static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr, |
1ab1457c | 365 | struct in6_addr *daddr, struct hlist_head udptable[]) |
1da177e4 LT |
366 | { |
367 | struct sock *sk, *sk2; | |
4bedb452 | 368 | const struct udphdr *uh = udp_hdr(skb); |
1da177e4 LT |
369 | int dif; |
370 | ||
371 | read_lock(&udp_hash_lock); | |
ba4e58ec | 372 | sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]); |
f2776ff0 | 373 | dif = inet6_iif(skb); |
1da177e4 LT |
374 | sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif); |
375 | if (!sk) { | |
376 | kfree_skb(skb); | |
377 | goto out; | |
378 | } | |
379 | ||
380 | sk2 = sk; | |
381 | while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr, | |
382 | uh->source, saddr, dif))) { | |
383 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
384 | if (buff) | |
385 | udpv6_queue_rcv_skb(sk2, buff); | |
386 | } | |
387 | udpv6_queue_rcv_skb(sk, skb); | |
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 | ||
427 | int __udp6_lib_rcv(struct sk_buff **pskb, struct hlist_head udptable[], | |
759e5d00 | 428 | int proto) |
1da177e4 LT |
429 | { |
430 | struct sk_buff *skb = *pskb; | |
431 | struct sock *sk; | |
1ab1457c | 432 | struct udphdr *uh; |
1da177e4 LT |
433 | struct net_device *dev = skb->dev; |
434 | struct in6_addr *saddr, *daddr; | |
435 | u32 ulen = 0; | |
436 | ||
437 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
438 | goto short_packet; | |
439 | ||
0660e03f ACM |
440 | saddr = &ipv6_hdr(skb)->saddr; |
441 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 442 | uh = udp_hdr(skb); |
1da177e4 LT |
443 | |
444 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
445 | if (ulen > skb->len) |
446 | goto short_packet; | |
1da177e4 | 447 | |
759e5d00 HX |
448 | if (proto == IPPROTO_UDP) { |
449 | /* UDP validates ulen. */ | |
1da177e4 | 450 | |
ba4e58ec GR |
451 | /* Check for jumbo payload */ |
452 | if (ulen == 0) | |
453 | ulen = skb->len; | |
1da177e4 | 454 | |
ba4e58ec GR |
455 | if (ulen < sizeof(*uh)) |
456 | goto short_packet; | |
1da177e4 | 457 | |
ba4e58ec GR |
458 | if (ulen < skb->len) { |
459 | if (pskb_trim_rcsum(skb, ulen)) | |
460 | goto short_packet; | |
0660e03f ACM |
461 | saddr = &ipv6_hdr(skb)->saddr; |
462 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 463 | uh = udp_hdr(skb); |
ba4e58ec | 464 | } |
ba4e58ec | 465 | } |
1da177e4 | 466 | |
759e5d00 HX |
467 | if (udp6_csum_init(skb, uh, proto)) |
468 | goto discard; | |
469 | ||
1ab1457c YH |
470 | /* |
471 | * Multicast receive code | |
1da177e4 | 472 | */ |
ba4e58ec GR |
473 | if (ipv6_addr_is_multicast(daddr)) |
474 | return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable); | |
1da177e4 LT |
475 | |
476 | /* Unicast */ | |
477 | ||
1ab1457c | 478 | /* |
1da177e4 LT |
479 | * check socket cache ... must talk to Alan about his plans |
480 | * for sock caches... i'll skip this for now. | |
481 | */ | |
ba4e58ec GR |
482 | sk = __udp6_lib_lookup(saddr, uh->source, |
483 | daddr, uh->dest, inet6_iif(skb), udptable); | |
1da177e4 LT |
484 | |
485 | if (sk == NULL) { | |
486 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
487 | goto discard; | |
488 | ||
ba4e58ec | 489 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 490 | goto discard; |
759e5d00 | 491 | UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); |
1da177e4 LT |
492 | |
493 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
494 | ||
495 | kfree_skb(skb); | |
add459aa | 496 | return 0; |
1da177e4 | 497 | } |
1ab1457c | 498 | |
1da177e4 | 499 | /* deliver */ |
1ab1457c | 500 | |
1da177e4 LT |
501 | udpv6_queue_rcv_skb(sk, skb); |
502 | sock_put(sk); | |
add459aa | 503 | return 0; |
1da177e4 | 504 | |
1ab1457c | 505 | short_packet: |
ba4e58ec | 506 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
759e5d00 HX |
507 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
508 | ulen, skb->len); | |
1da177e4 LT |
509 | |
510 | discard: | |
759e5d00 | 511 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 512 | kfree_skb(skb); |
add459aa | 513 | return 0; |
1da177e4 | 514 | } |
ba4e58ec GR |
515 | |
516 | static __inline__ int udpv6_rcv(struct sk_buff **pskb) | |
517 | { | |
759e5d00 | 518 | return __udp6_lib_rcv(pskb, udp_hash, IPPROTO_UDP); |
ba4e58ec GR |
519 | } |
520 | ||
1da177e4 LT |
521 | /* |
522 | * Throw away all pending data and cancel the corking. Socket is locked. | |
523 | */ | |
524 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
525 | { | |
526 | struct udp_sock *up = udp_sk(sk); | |
527 | ||
528 | if (up->pending) { | |
529 | up->len = 0; | |
530 | up->pending = 0; | |
531 | ip6_flush_pending_frames(sk); | |
1ab1457c | 532 | } |
1da177e4 LT |
533 | } |
534 | ||
535 | /* | |
536 | * Sending | |
537 | */ | |
538 | ||
4c0a6cb0 | 539 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
540 | { |
541 | struct sk_buff *skb; | |
542 | struct udphdr *uh; | |
4c0a6cb0 | 543 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
544 | struct inet_sock *inet = inet_sk(sk); |
545 | struct flowi *fl = &inet->cork.fl; | |
546 | int err = 0; | |
868c86bc | 547 | __wsum csum = 0; |
1da177e4 LT |
548 | |
549 | /* Grab the skbuff where UDP header space exists. */ | |
550 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
551 | goto out; | |
552 | ||
553 | /* | |
554 | * Create a UDP header | |
555 | */ | |
4bedb452 | 556 | uh = udp_hdr(skb); |
1da177e4 LT |
557 | uh->source = fl->fl_ip_sport; |
558 | uh->dest = fl->fl_ip_dport; | |
559 | uh->len = htons(up->len); | |
560 | uh->check = 0; | |
561 | ||
ba4e58ec GR |
562 | if (up->pcflag) |
563 | csum = udplite_csum_outgoing(sk, skb); | |
564 | else | |
565 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 566 | |
ba4e58ec GR |
567 | /* add protocol-dependent pseudo-header */ |
568 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
569 | up->len, fl->proto, csum ); | |
1da177e4 | 570 | if (uh->check == 0) |
f6ab0288 | 571 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 572 | |
1da177e4 LT |
573 | err = ip6_push_pending_frames(sk); |
574 | out: | |
575 | up->len = 0; | |
576 | up->pending = 0; | |
577 | return err; | |
578 | } | |
579 | ||
ba4e58ec | 580 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
581 | struct msghdr *msg, size_t len) |
582 | { | |
583 | struct ipv6_txoptions opt_space; | |
584 | struct udp_sock *up = udp_sk(sk); | |
585 | struct inet_sock *inet = inet_sk(sk); | |
586 | struct ipv6_pinfo *np = inet6_sk(sk); | |
587 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
588 | struct in6_addr *daddr, *final_p = NULL, final; | |
589 | struct ipv6_txoptions *opt = NULL; | |
590 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 591 | struct flowi fl; |
1da177e4 LT |
592 | struct dst_entry *dst; |
593 | int addr_len = msg->msg_namelen; | |
594 | int ulen = len; | |
595 | int hlimit = -1; | |
41a1f8ea | 596 | int tclass = -1; |
1da177e4 LT |
597 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
598 | int err; | |
987905de | 599 | int connected = 0; |
ba4e58ec GR |
600 | int is_udplite = up->pcflag; |
601 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); | |
1da177e4 LT |
602 | |
603 | /* destination address check */ | |
604 | if (sin6) { | |
605 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
606 | return -EINVAL; | |
607 | ||
608 | switch (sin6->sin6_family) { | |
609 | case AF_INET6: | |
610 | if (addr_len < SIN6_LEN_RFC2133) | |
611 | return -EINVAL; | |
612 | daddr = &sin6->sin6_addr; | |
613 | break; | |
614 | case AF_INET: | |
615 | goto do_udp_sendmsg; | |
616 | case AF_UNSPEC: | |
617 | msg->msg_name = sin6 = NULL; | |
618 | msg->msg_namelen = addr_len = 0; | |
619 | daddr = NULL; | |
620 | break; | |
621 | default: | |
622 | return -EINVAL; | |
623 | } | |
624 | } else if (!up->pending) { | |
625 | if (sk->sk_state != TCP_ESTABLISHED) | |
626 | return -EDESTADDRREQ; | |
627 | daddr = &np->daddr; | |
1ab1457c | 628 | } else |
1da177e4 LT |
629 | daddr = NULL; |
630 | ||
631 | if (daddr) { | |
632 | if (ipv6_addr_type(daddr) == IPV6_ADDR_MAPPED) { | |
633 | struct sockaddr_in sin; | |
634 | sin.sin_family = AF_INET; | |
635 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
636 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
637 | msg->msg_name = &sin; | |
638 | msg->msg_namelen = sizeof(sin); | |
639 | do_udp_sendmsg: | |
640 | if (__ipv6_only_sock(sk)) | |
641 | return -ENETUNREACH; | |
642 | return udp_sendmsg(iocb, sk, msg, len); | |
643 | } | |
644 | } | |
645 | ||
646 | if (up->pending == AF_INET) | |
647 | return udp_sendmsg(iocb, sk, msg, len); | |
648 | ||
649 | /* Rough check on arithmetic overflow, | |
b59e139b | 650 | better check is made in ip6_append_data(). |
1da177e4 LT |
651 | */ |
652 | if (len > INT_MAX - sizeof(struct udphdr)) | |
653 | return -EMSGSIZE; | |
1ab1457c | 654 | |
1da177e4 LT |
655 | if (up->pending) { |
656 | /* | |
657 | * There are pending frames. | |
658 | * The socket lock must be held while it's corked. | |
659 | */ | |
660 | lock_sock(sk); | |
661 | if (likely(up->pending)) { | |
662 | if (unlikely(up->pending != AF_INET6)) { | |
663 | release_sock(sk); | |
664 | return -EAFNOSUPPORT; | |
665 | } | |
666 | dst = NULL; | |
667 | goto do_append_data; | |
668 | } | |
669 | release_sock(sk); | |
670 | } | |
671 | ulen += sizeof(struct udphdr); | |
672 | ||
132a55f3 | 673 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
674 | |
675 | if (sin6) { | |
676 | if (sin6->sin6_port == 0) | |
677 | return -EINVAL; | |
678 | ||
132a55f3 | 679 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
680 | daddr = &sin6->sin6_addr; |
681 | ||
682 | if (np->sndflow) { | |
132a55f3 HX |
683 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
684 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
685 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
686 | if (flowlabel == NULL) |
687 | return -EINVAL; | |
688 | daddr = &flowlabel->dst; | |
689 | } | |
690 | } | |
691 | ||
692 | /* | |
693 | * Otherwise it will be difficult to maintain | |
694 | * sk->sk_dst_cache. | |
695 | */ | |
696 | if (sk->sk_state == TCP_ESTABLISHED && | |
697 | ipv6_addr_equal(daddr, &np->daddr)) | |
698 | daddr = &np->daddr; | |
699 | ||
700 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
701 | sin6->sin6_scope_id && | |
702 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 703 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
704 | } else { |
705 | if (sk->sk_state != TCP_ESTABLISHED) | |
706 | return -EDESTADDRREQ; | |
707 | ||
132a55f3 | 708 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 709 | daddr = &np->daddr; |
132a55f3 | 710 | fl.fl6_flowlabel = np->flow_label; |
987905de | 711 | connected = 1; |
1da177e4 LT |
712 | } |
713 | ||
132a55f3 HX |
714 | if (!fl.oif) |
715 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
716 | |
717 | if (msg->msg_controllen) { | |
718 | opt = &opt_space; | |
719 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
720 | opt->tot_len = sizeof(*opt); | |
721 | ||
132a55f3 | 722 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
723 | if (err < 0) { |
724 | fl6_sock_release(flowlabel); | |
725 | return err; | |
726 | } | |
132a55f3 HX |
727 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
728 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
729 | if (flowlabel == NULL) |
730 | return -EINVAL; | |
731 | } | |
732 | if (!(opt->opt_nflen|opt->opt_flen)) | |
733 | opt = NULL; | |
987905de | 734 | connected = 0; |
1da177e4 LT |
735 | } |
736 | if (opt == NULL) | |
737 | opt = np->opt; | |
df9890c3 YH |
738 | if (flowlabel) |
739 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
740 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 741 | |
ba4e58ec | 742 | fl.proto = sk->sk_protocol; |
132a55f3 HX |
743 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
744 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
745 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
746 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 747 | |
1da177e4 LT |
748 | /* merge ip6_build_xmit from ip6_output */ |
749 | if (opt && opt->srcrt) { | |
750 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
751 | ipv6_addr_copy(&final, &fl.fl6_dst); |
752 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 753 | final_p = &final; |
987905de | 754 | connected = 0; |
1da177e4 LT |
755 | } |
756 | ||
132a55f3 HX |
757 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
758 | fl.oif = np->mcast_oif; | |
987905de MK |
759 | connected = 0; |
760 | } | |
1da177e4 | 761 | |
132a55f3 | 762 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 763 | |
132a55f3 | 764 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
765 | if (err) |
766 | goto out; | |
767 | if (final_p) | |
132a55f3 | 768 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 769 | |
14e50e57 DM |
770 | if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) { |
771 | if (err == -EREMOTE) | |
772 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
773 | if (err < 0) | |
774 | goto out; | |
775 | } | |
1da177e4 LT |
776 | |
777 | if (hlimit < 0) { | |
132a55f3 | 778 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
779 | hlimit = np->mcast_hops; |
780 | else | |
781 | hlimit = np->hop_limit; | |
782 | if (hlimit < 0) | |
783 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
784 | if (hlimit < 0) | |
785 | hlimit = ipv6_get_hoplimit(dst->dev); | |
786 | } | |
787 | ||
41a1f8ea YH |
788 | if (tclass < 0) { |
789 | tclass = np->tclass; | |
790 | if (tclass < 0) | |
791 | tclass = 0; | |
792 | } | |
793 | ||
1da177e4 LT |
794 | if (msg->msg_flags&MSG_CONFIRM) |
795 | goto do_confirm; | |
796 | back_from_confirm: | |
797 | ||
798 | lock_sock(sk); | |
799 | if (unlikely(up->pending)) { | |
800 | /* The socket is already corked while preparing it. */ | |
801 | /* ... which is an evident application bug. --ANK */ | |
802 | release_sock(sk); | |
803 | ||
64ce2073 | 804 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
805 | err = -EINVAL; |
806 | goto out; | |
807 | } | |
808 | ||
809 | up->pending = AF_INET6; | |
810 | ||
811 | do_append_data: | |
812 | up->len += ulen; | |
ba4e58ec GR |
813 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
814 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 815 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
816 | (struct rt6_info*)dst, |
817 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
818 | if (err) |
819 | udp_v6_flush_pending_frames(sk); | |
820 | else if (!corkreq) | |
4c0a6cb0 | 821 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
822 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
823 | up->pending = 0; | |
1da177e4 | 824 | |
a5e7c210 DM |
825 | if (dst) { |
826 | if (connected) { | |
827 | ip6_dst_store(sk, dst, | |
132a55f3 | 828 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
829 | &np->daddr : NULL, |
830 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 831 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
832 | &np->saddr : |
833 | #endif | |
834 | NULL); | |
a5e7c210 DM |
835 | } else { |
836 | dst_release(dst); | |
837 | } | |
838 | } | |
839 | ||
1da177e4 LT |
840 | if (err > 0) |
841 | err = np->recverr ? net_xmit_errno(err) : 0; | |
842 | release_sock(sk); | |
843 | out: | |
844 | fl6_sock_release(flowlabel); | |
845 | if (!err) { | |
ba4e58ec | 846 | UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite); |
1da177e4 LT |
847 | return len; |
848 | } | |
a18135eb DM |
849 | /* |
850 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
851 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
852 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
853 | * things). We could add another new stat but at least for now that | |
854 | * seems like overkill. | |
855 | */ | |
856 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
ba4e58ec | 857 | UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite); |
a18135eb | 858 | } |
1da177e4 LT |
859 | return err; |
860 | ||
861 | do_confirm: | |
862 | dst_confirm(dst); | |
863 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
864 | goto back_from_confirm; | |
865 | err = 0; | |
866 | goto out; | |
867 | } | |
868 | ||
ba4e58ec | 869 | int udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
870 | { |
871 | lock_sock(sk); | |
872 | udp_v6_flush_pending_frames(sk); | |
873 | release_sock(sk); | |
874 | ||
875 | inet6_destroy_sock(sk); | |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
880 | /* | |
881 | * Socket option code for UDP | |
882 | */ | |
ba4e58ec GR |
883 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
884 | char __user *optval, int optlen) | |
3fdadf7d | 885 | { |
ba4e58ec | 886 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
887 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
888 | udp_v6_push_pending_frames); | |
ba4e58ec | 889 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
890 | } |
891 | ||
892 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
893 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
894 | char __user *optval, int optlen) | |
3fdadf7d | 895 | { |
ba4e58ec | 896 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
897 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
898 | udp_v6_push_pending_frames); | |
ba4e58ec | 899 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
900 | } |
901 | #endif | |
902 | ||
ba4e58ec GR |
903 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
904 | char __user *optval, int __user *optlen) | |
3fdadf7d | 905 | { |
ba4e58ec | 906 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 907 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 908 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
909 | } |
910 | ||
911 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
912 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
913 | char __user *optval, int __user *optlen) | |
3fdadf7d | 914 | { |
ba4e58ec | 915 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 916 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 917 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
918 | } |
919 | #endif | |
920 | ||
1da177e4 LT |
921 | static struct inet6_protocol udpv6_protocol = { |
922 | .handler = udpv6_rcv, | |
923 | .err_handler = udpv6_err, | |
924 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
925 | }; | |
926 | ||
927 | /* ------------------------------------------------------------------------ */ | |
928 | #ifdef CONFIG_PROC_FS | |
929 | ||
930 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
931 | { | |
932 | struct inet_sock *inet = inet_sk(sp); | |
933 | struct ipv6_pinfo *np = inet6_sk(sp); | |
934 | struct in6_addr *dest, *src; | |
935 | __u16 destp, srcp; | |
936 | ||
937 | dest = &np->daddr; | |
938 | src = &np->rcv_saddr; | |
939 | destp = ntohs(inet->dport); | |
940 | srcp = ntohs(inet->sport); | |
941 | seq_printf(seq, | |
942 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
943 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
944 | bucket, | |
945 | src->s6_addr32[0], src->s6_addr32[1], | |
946 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
947 | dest->s6_addr32[0], dest->s6_addr32[1], | |
948 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 949 | sp->sk_state, |
1da177e4 LT |
950 | atomic_read(&sp->sk_wmem_alloc), |
951 | atomic_read(&sp->sk_rmem_alloc), | |
952 | 0, 0L, 0, | |
953 | sock_i_uid(sp), 0, | |
954 | sock_i_ino(sp), | |
955 | atomic_read(&sp->sk_refcnt), sp); | |
956 | } | |
957 | ||
ba4e58ec | 958 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
959 | { |
960 | if (v == SEQ_START_TOKEN) | |
961 | seq_printf(seq, | |
962 | " sl " | |
963 | "local_address " | |
964 | "remote_address " | |
965 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
966 | " uid timeout inode\n"); | |
967 | else | |
968 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
969 | return 0; | |
970 | } | |
971 | ||
972 | static struct file_operations udp6_seq_fops; | |
973 | static struct udp_seq_afinfo udp6_seq_afinfo = { | |
974 | .owner = THIS_MODULE, | |
975 | .name = "udp6", | |
976 | .family = AF_INET6, | |
ba4e58ec | 977 | .hashtable = udp_hash, |
1da177e4 LT |
978 | .seq_show = udp6_seq_show, |
979 | .seq_fops = &udp6_seq_fops, | |
980 | }; | |
981 | ||
982 | int __init udp6_proc_init(void) | |
983 | { | |
984 | return udp_proc_register(&udp6_seq_afinfo); | |
985 | } | |
986 | ||
987 | void udp6_proc_exit(void) { | |
988 | udp_proc_unregister(&udp6_seq_afinfo); | |
989 | } | |
990 | #endif /* CONFIG_PROC_FS */ | |
991 | ||
992 | /* ------------------------------------------------------------------------ */ | |
993 | ||
994 | struct proto udpv6_prot = { | |
543d9cfe ACM |
995 | .name = "UDPv6", |
996 | .owner = THIS_MODULE, | |
ba4e58ec | 997 | .close = udp_lib_close, |
543d9cfe ACM |
998 | .connect = ip6_datagram_connect, |
999 | .disconnect = udp_disconnect, | |
1000 | .ioctl = udp_ioctl, | |
1001 | .destroy = udpv6_destroy_sock, | |
1002 | .setsockopt = udpv6_setsockopt, | |
1003 | .getsockopt = udpv6_getsockopt, | |
1004 | .sendmsg = udpv6_sendmsg, | |
1005 | .recvmsg = udpv6_recvmsg, | |
1006 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1007 | .hash = udp_lib_hash, |
1008 | .unhash = udp_lib_unhash, | |
543d9cfe ACM |
1009 | .get_port = udp_v6_get_port, |
1010 | .obj_size = sizeof(struct udp6_sock), | |
3fdadf7d | 1011 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1012 | .compat_setsockopt = compat_udpv6_setsockopt, |
1013 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1014 | #endif |
1da177e4 LT |
1015 | }; |
1016 | ||
1da177e4 LT |
1017 | static struct inet_protosw udpv6_protosw = { |
1018 | .type = SOCK_DGRAM, | |
1019 | .protocol = IPPROTO_UDP, | |
1020 | .prot = &udpv6_prot, | |
1021 | .ops = &inet6_dgram_ops, | |
1022 | .capability =-1, | |
1023 | .no_check = UDP_CSUM_DEFAULT, | |
1024 | .flags = INET_PROTOSW_PERMANENT, | |
1025 | }; | |
1026 | ||
1027 | ||
1028 | void __init udpv6_init(void) | |
1029 | { | |
1030 | if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0) | |
1031 | printk(KERN_ERR "udpv6_init: Could not register protocol\n"); | |
1032 | inet6_register_protosw(&udpv6_protosw); | |
1033 | } |