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 | |
ba89966c | 54 | DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly; |
1781f7f5 | 55 | EXPORT_SYMBOL(udp_stats_in6); |
1da177e4 | 56 | |
25030a7f | 57 | static inline int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 58 | { |
df2bc459 | 59 | return udp_get_port(sk, snum, ipv6_rcv_saddr_equal); |
1da177e4 LT |
60 | } |
61 | ||
ba4e58ec GR |
62 | static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport, |
63 | struct in6_addr *daddr, __be16 dport, | |
64 | int dif, struct hlist_head udptable[]) | |
1da177e4 LT |
65 | { |
66 | struct sock *sk, *result = NULL; | |
67 | struct hlist_node *node; | |
68 | unsigned short hnum = ntohs(dport); | |
69 | int badness = -1; | |
70 | ||
1ab1457c | 71 | read_lock(&udp_hash_lock); |
ba4e58ec | 72 | sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) { |
1da177e4 LT |
73 | struct inet_sock *inet = inet_sk(sk); |
74 | ||
95f30b33 | 75 | if (sk->sk_hash == hnum && sk->sk_family == PF_INET6) { |
1da177e4 LT |
76 | struct ipv6_pinfo *np = inet6_sk(sk); |
77 | int score = 0; | |
78 | if (inet->dport) { | |
79 | if (inet->dport != sport) | |
80 | continue; | |
81 | score++; | |
82 | } | |
83 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
84 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
85 | continue; | |
86 | score++; | |
87 | } | |
88 | if (!ipv6_addr_any(&np->daddr)) { | |
89 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
90 | continue; | |
91 | score++; | |
92 | } | |
93 | if (sk->sk_bound_dev_if) { | |
94 | if (sk->sk_bound_dev_if != dif) | |
95 | continue; | |
96 | score++; | |
97 | } | |
add459aa | 98 | if (score == 4) { |
1da177e4 LT |
99 | result = sk; |
100 | break; | |
add459aa | 101 | } else if (score > badness) { |
1da177e4 LT |
102 | result = sk; |
103 | badness = score; | |
104 | } | |
105 | } | |
106 | } | |
107 | if (result) | |
108 | sock_hold(result); | |
1ab1457c | 109 | read_unlock(&udp_hash_lock); |
1da177e4 LT |
110 | return result; |
111 | } | |
112 | ||
1da177e4 LT |
113 | /* |
114 | * This should be easy, if there is something there we | |
115 | * return it, otherwise we block. | |
116 | */ | |
117 | ||
ba4e58ec | 118 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
119 | struct msghdr *msg, size_t len, |
120 | int noblock, int flags, int *addr_len) | |
121 | { | |
122 | struct ipv6_pinfo *np = inet6_sk(sk); | |
123 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 124 | struct sk_buff *skb; |
759e5d00 HX |
125 | unsigned int ulen, copied; |
126 | int err; | |
127 | int is_udplite = IS_UDPLITE(sk); | |
1da177e4 | 128 | |
1ab1457c YH |
129 | if (addr_len) |
130 | *addr_len=sizeof(struct sockaddr_in6); | |
131 | ||
1da177e4 LT |
132 | if (flags & MSG_ERRQUEUE) |
133 | return ipv6_recv_error(sk, msg, len); | |
134 | ||
135 | try_again: | |
136 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
137 | if (!skb) | |
138 | goto out; | |
139 | ||
759e5d00 HX |
140 | ulen = skb->len - sizeof(struct udphdr); |
141 | copied = len; | |
142 | if (copied > ulen) | |
143 | copied = ulen; | |
144 | else if (copied < ulen) | |
1ab1457c | 145 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 146 | |
ba4e58ec | 147 | /* |
759e5d00 HX |
148 | * If checksum is needed at all, try to do it while copying the |
149 | * data. If the data is truncated, or if we only want a partial | |
150 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 151 | */ |
ba4e58ec | 152 | |
759e5d00 HX |
153 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
154 | if (udp_lib_checksum_complete(skb)) | |
1da177e4 | 155 | goto csum_copy_err; |
ba4e58ec GR |
156 | } |
157 | ||
60476372 | 158 | if (skb_csum_unnecessary(skb)) |
ba4e58ec GR |
159 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
160 | msg->msg_iov, copied ); | |
161 | else { | |
1da177e4 LT |
162 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
163 | if (err == -EINVAL) | |
164 | goto csum_copy_err; | |
165 | } | |
166 | if (err) | |
167 | goto out_free; | |
168 | ||
cb75994e WC |
169 | UDP6_INC_STATS_USER(UDP_MIB_INDATAGRAMS, is_udplite); |
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: | |
207 | skb_free_datagram(sk, skb); | |
208 | out: | |
209 | return err; | |
210 | ||
211 | csum_copy_err: | |
27ab2568 HX |
212 | if (!skb_kill_datagram(sk, skb, flags)) |
213 | UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite); | |
1da177e4 | 214 | |
7a0ff716 | 215 | if (flags & MSG_DONTWAIT) |
1da177e4 | 216 | return -EAGAIN; |
1da177e4 LT |
217 | goto try_again; |
218 | } | |
219 | ||
ba4e58ec GR |
220 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
221 | int type, int code, int offset, __be32 info, | |
222 | struct hlist_head udptable[] ) | |
1da177e4 LT |
223 | { |
224 | struct ipv6_pinfo *np; | |
225 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
226 | struct in6_addr *saddr = &hdr->saddr; |
227 | struct in6_addr *daddr = &hdr->daddr; | |
228 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
229 | struct sock *sk; | |
230 | int err; | |
231 | ||
ba4e58ec GR |
232 | sk = __udp6_lib_lookup(daddr, uh->dest, |
233 | saddr, uh->source, inet6_iif(skb), udptable); | |
1da177e4 LT |
234 | if (sk == NULL) |
235 | return; | |
236 | ||
237 | np = inet6_sk(sk); | |
238 | ||
239 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
240 | goto out; | |
241 | ||
242 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
243 | goto out; | |
244 | ||
245 | if (np->recverr) | |
246 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
247 | ||
248 | sk->sk_err = err; | |
249 | sk->sk_error_report(sk); | |
250 | out: | |
251 | sock_put(sk); | |
252 | } | |
253 | ||
ba4e58ec GR |
254 | static __inline__ void udpv6_err(struct sk_buff *skb, |
255 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 256 | int code, int offset, __be32 info ) |
ba4e58ec GR |
257 | { |
258 | return __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash); | |
259 | } | |
260 | ||
261 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 262 | { |
ba4e58ec | 263 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 264 | int rc; |
b2bf1e26 | 265 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 266 | |
ba4e58ec GR |
267 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
268 | goto drop; | |
1da177e4 | 269 | |
ba4e58ec GR |
270 | /* |
271 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
272 | */ | |
b2bf1e26 | 273 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
274 | |
275 | if (up->pcrlen == 0) { /* full coverage was set */ | |
276 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
277 | " %d while full coverage %d requested\n", | |
278 | UDP_SKB_CB(skb)->cscov, skb->len); | |
279 | goto drop; | |
280 | } | |
281 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
282 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
283 | "too small, need min %d\n", | |
284 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
285 | goto drop; | |
286 | } | |
1da177e4 LT |
287 | } |
288 | ||
1ab6eb62 HX |
289 | if (sk->sk_filter) { |
290 | if (udp_lib_checksum_complete(skb)) | |
291 | goto drop; | |
292 | } | |
ba4e58ec | 293 | |
a18135eb DM |
294 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
295 | /* Note that an ENOMEM error is charged twice */ | |
296 | if (rc == -ENOMEM) | |
b2bf1e26 | 297 | UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, is_udplite); |
ba4e58ec | 298 | goto drop; |
1da177e4 | 299 | } |
cb75994e | 300 | |
1da177e4 | 301 | return 0; |
ba4e58ec | 302 | drop: |
b2bf1e26 | 303 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
304 | kfree_skb(skb); |
305 | return -1; | |
1da177e4 LT |
306 | } |
307 | ||
308 | static struct sock *udp_v6_mcast_next(struct sock *sk, | |
e69a4adc AV |
309 | __be16 loc_port, struct in6_addr *loc_addr, |
310 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
311 | int dif) |
312 | { | |
313 | struct hlist_node *node; | |
314 | struct sock *s = sk; | |
315 | unsigned short num = ntohs(loc_port); | |
316 | ||
317 | sk_for_each_from(s, node) { | |
318 | struct inet_sock *inet = inet_sk(s); | |
319 | ||
95f30b33 | 320 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
321 | struct ipv6_pinfo *np = inet6_sk(s); |
322 | if (inet->dport) { | |
323 | if (inet->dport != rmt_port) | |
324 | continue; | |
325 | } | |
326 | if (!ipv6_addr_any(&np->daddr) && | |
327 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
328 | continue; | |
329 | ||
330 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
331 | continue; | |
332 | ||
333 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
334 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
335 | continue; | |
1da177e4 | 336 | } |
add459aa | 337 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
338 | continue; |
339 | return s; | |
340 | } | |
341 | } | |
342 | return NULL; | |
343 | } | |
344 | ||
345 | /* | |
346 | * Note: called only from the BH handler context, | |
347 | * so we don't need to lock the hashes. | |
348 | */ | |
ba4e58ec | 349 | static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr, |
1ab1457c | 350 | struct in6_addr *daddr, struct hlist_head udptable[]) |
1da177e4 LT |
351 | { |
352 | struct sock *sk, *sk2; | |
4bedb452 | 353 | const struct udphdr *uh = udp_hdr(skb); |
1da177e4 LT |
354 | int dif; |
355 | ||
356 | read_lock(&udp_hash_lock); | |
ba4e58ec | 357 | sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]); |
f2776ff0 | 358 | dif = inet6_iif(skb); |
1da177e4 LT |
359 | sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif); |
360 | if (!sk) { | |
361 | kfree_skb(skb); | |
362 | goto out; | |
363 | } | |
364 | ||
365 | sk2 = sk; | |
366 | while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr, | |
367 | uh->source, saddr, dif))) { | |
368 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
369 | if (buff) | |
370 | udpv6_queue_rcv_skb(sk2, buff); | |
371 | } | |
372 | udpv6_queue_rcv_skb(sk, skb); | |
373 | out: | |
374 | read_unlock(&udp_hash_lock); | |
ba4e58ec | 375 | return 0; |
1da177e4 LT |
376 | } |
377 | ||
759e5d00 HX |
378 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
379 | int proto) | |
ba4e58ec | 380 | { |
759e5d00 HX |
381 | int err; |
382 | ||
383 | UDP_SKB_CB(skb)->partial_cov = 0; | |
384 | UDP_SKB_CB(skb)->cscov = skb->len; | |
385 | ||
386 | if (proto == IPPROTO_UDPLITE) { | |
387 | err = udplite_checksum_init(skb, uh); | |
388 | if (err) | |
389 | return err; | |
390 | } | |
391 | ||
ba4e58ec GR |
392 | if (uh->check == 0) { |
393 | /* RFC 2460 section 8.1 says that we SHOULD log | |
394 | this error. Well, it is reasonable. | |
395 | */ | |
396 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
397 | return 1; | |
398 | } | |
399 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 400 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 401 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
402 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
403 | ||
60476372 | 404 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
405 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
406 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 407 | skb->len, proto, 0)); |
ba4e58ec | 408 | |
759e5d00 | 409 | return 0; |
ba4e58ec GR |
410 | } |
411 | ||
e5bbef20 | 412 | int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[], |
759e5d00 | 413 | int proto) |
1da177e4 | 414 | { |
1da177e4 | 415 | struct sock *sk; |
1ab1457c | 416 | struct udphdr *uh; |
1da177e4 LT |
417 | struct net_device *dev = skb->dev; |
418 | struct in6_addr *saddr, *daddr; | |
419 | u32 ulen = 0; | |
420 | ||
421 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
422 | goto short_packet; | |
423 | ||
0660e03f ACM |
424 | saddr = &ipv6_hdr(skb)->saddr; |
425 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 426 | uh = udp_hdr(skb); |
1da177e4 LT |
427 | |
428 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
429 | if (ulen > skb->len) |
430 | goto short_packet; | |
1da177e4 | 431 | |
759e5d00 HX |
432 | if (proto == IPPROTO_UDP) { |
433 | /* UDP validates ulen. */ | |
1da177e4 | 434 | |
ba4e58ec GR |
435 | /* Check for jumbo payload */ |
436 | if (ulen == 0) | |
437 | ulen = skb->len; | |
1da177e4 | 438 | |
ba4e58ec GR |
439 | if (ulen < sizeof(*uh)) |
440 | goto short_packet; | |
1da177e4 | 441 | |
ba4e58ec GR |
442 | if (ulen < skb->len) { |
443 | if (pskb_trim_rcsum(skb, ulen)) | |
444 | goto short_packet; | |
0660e03f ACM |
445 | saddr = &ipv6_hdr(skb)->saddr; |
446 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 447 | uh = udp_hdr(skb); |
ba4e58ec | 448 | } |
ba4e58ec | 449 | } |
1da177e4 | 450 | |
759e5d00 HX |
451 | if (udp6_csum_init(skb, uh, proto)) |
452 | goto discard; | |
453 | ||
1ab1457c YH |
454 | /* |
455 | * Multicast receive code | |
1da177e4 | 456 | */ |
ba4e58ec GR |
457 | if (ipv6_addr_is_multicast(daddr)) |
458 | return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable); | |
1da177e4 LT |
459 | |
460 | /* Unicast */ | |
461 | ||
1ab1457c | 462 | /* |
1da177e4 LT |
463 | * check socket cache ... must talk to Alan about his plans |
464 | * for sock caches... i'll skip this for now. | |
465 | */ | |
ba4e58ec GR |
466 | sk = __udp6_lib_lookup(saddr, uh->source, |
467 | daddr, uh->dest, inet6_iif(skb), udptable); | |
1da177e4 LT |
468 | |
469 | if (sk == NULL) { | |
470 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
471 | goto discard; | |
472 | ||
ba4e58ec | 473 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 474 | goto discard; |
759e5d00 | 475 | UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); |
1da177e4 LT |
476 | |
477 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
478 | ||
479 | kfree_skb(skb); | |
add459aa | 480 | return 0; |
1da177e4 | 481 | } |
1ab1457c | 482 | |
1da177e4 | 483 | /* deliver */ |
1ab1457c | 484 | |
1da177e4 LT |
485 | udpv6_queue_rcv_skb(sk, skb); |
486 | sock_put(sk); | |
add459aa | 487 | return 0; |
1da177e4 | 488 | |
1ab1457c | 489 | short_packet: |
ba4e58ec | 490 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
759e5d00 HX |
491 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
492 | ulen, skb->len); | |
1da177e4 LT |
493 | |
494 | discard: | |
759e5d00 | 495 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 496 | kfree_skb(skb); |
add459aa | 497 | return 0; |
1da177e4 | 498 | } |
ba4e58ec | 499 | |
e5bbef20 | 500 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 501 | { |
e5bbef20 | 502 | return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP); |
ba4e58ec GR |
503 | } |
504 | ||
1da177e4 LT |
505 | /* |
506 | * Throw away all pending data and cancel the corking. Socket is locked. | |
507 | */ | |
508 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
509 | { | |
510 | struct udp_sock *up = udp_sk(sk); | |
511 | ||
512 | if (up->pending) { | |
513 | up->len = 0; | |
514 | up->pending = 0; | |
515 | ip6_flush_pending_frames(sk); | |
1ab1457c | 516 | } |
1da177e4 LT |
517 | } |
518 | ||
519 | /* | |
520 | * Sending | |
521 | */ | |
522 | ||
4c0a6cb0 | 523 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
524 | { |
525 | struct sk_buff *skb; | |
526 | struct udphdr *uh; | |
4c0a6cb0 | 527 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
528 | struct inet_sock *inet = inet_sk(sk); |
529 | struct flowi *fl = &inet->cork.fl; | |
530 | int err = 0; | |
b2bf1e26 | 531 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 532 | __wsum csum = 0; |
1da177e4 LT |
533 | |
534 | /* Grab the skbuff where UDP header space exists. */ | |
535 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
536 | goto out; | |
537 | ||
538 | /* | |
539 | * Create a UDP header | |
540 | */ | |
4bedb452 | 541 | uh = udp_hdr(skb); |
1da177e4 LT |
542 | uh->source = fl->fl_ip_sport; |
543 | uh->dest = fl->fl_ip_dport; | |
544 | uh->len = htons(up->len); | |
545 | uh->check = 0; | |
546 | ||
b2bf1e26 | 547 | if (is_udplite) |
ba4e58ec GR |
548 | csum = udplite_csum_outgoing(sk, skb); |
549 | else | |
550 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 551 | |
ba4e58ec GR |
552 | /* add protocol-dependent pseudo-header */ |
553 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
554 | up->len, fl->proto, csum ); | |
1da177e4 | 555 | if (uh->check == 0) |
f6ab0288 | 556 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 557 | |
1da177e4 LT |
558 | err = ip6_push_pending_frames(sk); |
559 | out: | |
560 | up->len = 0; | |
561 | up->pending = 0; | |
cd562c98 | 562 | if (!err) |
b2bf1e26 | 563 | UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite); |
1da177e4 LT |
564 | return err; |
565 | } | |
566 | ||
ba4e58ec | 567 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
568 | struct msghdr *msg, size_t len) |
569 | { | |
570 | struct ipv6_txoptions opt_space; | |
571 | struct udp_sock *up = udp_sk(sk); | |
572 | struct inet_sock *inet = inet_sk(sk); | |
573 | struct ipv6_pinfo *np = inet6_sk(sk); | |
574 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
575 | struct in6_addr *daddr, *final_p = NULL, final; | |
576 | struct ipv6_txoptions *opt = NULL; | |
577 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 578 | struct flowi fl; |
1da177e4 LT |
579 | struct dst_entry *dst; |
580 | int addr_len = msg->msg_namelen; | |
581 | int ulen = len; | |
582 | int hlimit = -1; | |
41a1f8ea | 583 | int tclass = -1; |
1da177e4 LT |
584 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
585 | int err; | |
987905de | 586 | int connected = 0; |
b2bf1e26 | 587 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 588 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
589 | |
590 | /* destination address check */ | |
591 | if (sin6) { | |
592 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
593 | return -EINVAL; | |
594 | ||
595 | switch (sin6->sin6_family) { | |
596 | case AF_INET6: | |
597 | if (addr_len < SIN6_LEN_RFC2133) | |
598 | return -EINVAL; | |
599 | daddr = &sin6->sin6_addr; | |
600 | break; | |
601 | case AF_INET: | |
602 | goto do_udp_sendmsg; | |
603 | case AF_UNSPEC: | |
604 | msg->msg_name = sin6 = NULL; | |
605 | msg->msg_namelen = addr_len = 0; | |
606 | daddr = NULL; | |
607 | break; | |
608 | default: | |
609 | return -EINVAL; | |
610 | } | |
611 | } else if (!up->pending) { | |
612 | if (sk->sk_state != TCP_ESTABLISHED) | |
613 | return -EDESTADDRREQ; | |
614 | daddr = &np->daddr; | |
1ab1457c | 615 | } else |
1da177e4 LT |
616 | daddr = NULL; |
617 | ||
618 | if (daddr) { | |
e773e4fa | 619 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
620 | struct sockaddr_in sin; |
621 | sin.sin_family = AF_INET; | |
622 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
623 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
624 | msg->msg_name = &sin; | |
625 | msg->msg_namelen = sizeof(sin); | |
626 | do_udp_sendmsg: | |
627 | if (__ipv6_only_sock(sk)) | |
628 | return -ENETUNREACH; | |
629 | return udp_sendmsg(iocb, sk, msg, len); | |
630 | } | |
631 | } | |
632 | ||
633 | if (up->pending == AF_INET) | |
634 | return udp_sendmsg(iocb, sk, msg, len); | |
635 | ||
636 | /* Rough check on arithmetic overflow, | |
b59e139b | 637 | better check is made in ip6_append_data(). |
1da177e4 LT |
638 | */ |
639 | if (len > INT_MAX - sizeof(struct udphdr)) | |
640 | return -EMSGSIZE; | |
1ab1457c | 641 | |
1da177e4 LT |
642 | if (up->pending) { |
643 | /* | |
644 | * There are pending frames. | |
645 | * The socket lock must be held while it's corked. | |
646 | */ | |
647 | lock_sock(sk); | |
648 | if (likely(up->pending)) { | |
649 | if (unlikely(up->pending != AF_INET6)) { | |
650 | release_sock(sk); | |
651 | return -EAFNOSUPPORT; | |
652 | } | |
653 | dst = NULL; | |
654 | goto do_append_data; | |
655 | } | |
656 | release_sock(sk); | |
657 | } | |
658 | ulen += sizeof(struct udphdr); | |
659 | ||
132a55f3 | 660 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
661 | |
662 | if (sin6) { | |
663 | if (sin6->sin6_port == 0) | |
664 | return -EINVAL; | |
665 | ||
132a55f3 | 666 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
667 | daddr = &sin6->sin6_addr; |
668 | ||
669 | if (np->sndflow) { | |
132a55f3 HX |
670 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
671 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
672 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
673 | if (flowlabel == NULL) |
674 | return -EINVAL; | |
675 | daddr = &flowlabel->dst; | |
676 | } | |
677 | } | |
678 | ||
679 | /* | |
680 | * Otherwise it will be difficult to maintain | |
681 | * sk->sk_dst_cache. | |
682 | */ | |
683 | if (sk->sk_state == TCP_ESTABLISHED && | |
684 | ipv6_addr_equal(daddr, &np->daddr)) | |
685 | daddr = &np->daddr; | |
686 | ||
687 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
688 | sin6->sin6_scope_id && | |
689 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 690 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
691 | } else { |
692 | if (sk->sk_state != TCP_ESTABLISHED) | |
693 | return -EDESTADDRREQ; | |
694 | ||
132a55f3 | 695 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 696 | daddr = &np->daddr; |
132a55f3 | 697 | fl.fl6_flowlabel = np->flow_label; |
987905de | 698 | connected = 1; |
1da177e4 LT |
699 | } |
700 | ||
132a55f3 HX |
701 | if (!fl.oif) |
702 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
703 | |
704 | if (msg->msg_controllen) { | |
705 | opt = &opt_space; | |
706 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
707 | opt->tot_len = sizeof(*opt); | |
708 | ||
132a55f3 | 709 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
710 | if (err < 0) { |
711 | fl6_sock_release(flowlabel); | |
712 | return err; | |
713 | } | |
132a55f3 HX |
714 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
715 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
716 | if (flowlabel == NULL) |
717 | return -EINVAL; | |
718 | } | |
719 | if (!(opt->opt_nflen|opt->opt_flen)) | |
720 | opt = NULL; | |
987905de | 721 | connected = 0; |
1da177e4 LT |
722 | } |
723 | if (opt == NULL) | |
724 | opt = np->opt; | |
df9890c3 YH |
725 | if (flowlabel) |
726 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
727 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 728 | |
ba4e58ec | 729 | fl.proto = sk->sk_protocol; |
132a55f3 HX |
730 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
731 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
732 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
733 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 734 | |
1da177e4 LT |
735 | /* merge ip6_build_xmit from ip6_output */ |
736 | if (opt && opt->srcrt) { | |
737 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
738 | ipv6_addr_copy(&final, &fl.fl6_dst); |
739 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 740 | final_p = &final; |
987905de | 741 | connected = 0; |
1da177e4 LT |
742 | } |
743 | ||
132a55f3 HX |
744 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
745 | fl.oif = np->mcast_oif; | |
987905de MK |
746 | connected = 0; |
747 | } | |
1da177e4 | 748 | |
132a55f3 | 749 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 750 | |
132a55f3 | 751 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
752 | if (err) |
753 | goto out; | |
754 | if (final_p) | |
132a55f3 | 755 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 756 | |
14e50e57 DM |
757 | if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) { |
758 | if (err == -EREMOTE) | |
759 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
760 | if (err < 0) | |
761 | goto out; | |
762 | } | |
1da177e4 LT |
763 | |
764 | if (hlimit < 0) { | |
132a55f3 | 765 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
766 | hlimit = np->mcast_hops; |
767 | else | |
768 | hlimit = np->hop_limit; | |
769 | if (hlimit < 0) | |
770 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
771 | if (hlimit < 0) | |
772 | hlimit = ipv6_get_hoplimit(dst->dev); | |
773 | } | |
774 | ||
41a1f8ea YH |
775 | if (tclass < 0) { |
776 | tclass = np->tclass; | |
777 | if (tclass < 0) | |
778 | tclass = 0; | |
779 | } | |
780 | ||
1da177e4 LT |
781 | if (msg->msg_flags&MSG_CONFIRM) |
782 | goto do_confirm; | |
783 | back_from_confirm: | |
784 | ||
785 | lock_sock(sk); | |
786 | if (unlikely(up->pending)) { | |
787 | /* The socket is already corked while preparing it. */ | |
788 | /* ... which is an evident application bug. --ANK */ | |
789 | release_sock(sk); | |
790 | ||
64ce2073 | 791 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
792 | err = -EINVAL; |
793 | goto out; | |
794 | } | |
795 | ||
796 | up->pending = AF_INET6; | |
797 | ||
798 | do_append_data: | |
799 | up->len += ulen; | |
ba4e58ec GR |
800 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
801 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 802 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
803 | (struct rt6_info*)dst, |
804 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
805 | if (err) |
806 | udp_v6_flush_pending_frames(sk); | |
807 | else if (!corkreq) | |
4c0a6cb0 | 808 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
809 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
810 | up->pending = 0; | |
1da177e4 | 811 | |
a5e7c210 DM |
812 | if (dst) { |
813 | if (connected) { | |
814 | ip6_dst_store(sk, dst, | |
132a55f3 | 815 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
816 | &np->daddr : NULL, |
817 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 818 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
819 | &np->saddr : |
820 | #endif | |
821 | NULL); | |
a5e7c210 DM |
822 | } else { |
823 | dst_release(dst); | |
824 | } | |
825 | } | |
826 | ||
1da177e4 LT |
827 | if (err > 0) |
828 | err = np->recverr ? net_xmit_errno(err) : 0; | |
829 | release_sock(sk); | |
830 | out: | |
831 | fl6_sock_release(flowlabel); | |
cd562c98 | 832 | if (!err) |
1da177e4 | 833 | return len; |
a18135eb DM |
834 | /* |
835 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
836 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
837 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
838 | * things). We could add another new stat but at least for now that | |
839 | * seems like overkill. | |
840 | */ | |
841 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
ba4e58ec | 842 | UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite); |
a18135eb | 843 | } |
1da177e4 LT |
844 | return err; |
845 | ||
846 | do_confirm: | |
847 | dst_confirm(dst); | |
848 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
849 | goto back_from_confirm; | |
850 | err = 0; | |
851 | goto out; | |
852 | } | |
853 | ||
ba4e58ec | 854 | int udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
855 | { |
856 | lock_sock(sk); | |
857 | udp_v6_flush_pending_frames(sk); | |
858 | release_sock(sk); | |
859 | ||
860 | inet6_destroy_sock(sk); | |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
865 | /* | |
866 | * Socket option code for UDP | |
867 | */ | |
ba4e58ec GR |
868 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
869 | char __user *optval, int optlen) | |
3fdadf7d | 870 | { |
ba4e58ec | 871 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
872 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
873 | udp_v6_push_pending_frames); | |
ba4e58ec | 874 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
875 | } |
876 | ||
877 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
878 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
879 | char __user *optval, int optlen) | |
3fdadf7d | 880 | { |
ba4e58ec | 881 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
882 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
883 | udp_v6_push_pending_frames); | |
ba4e58ec | 884 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
885 | } |
886 | #endif | |
887 | ||
ba4e58ec GR |
888 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
889 | char __user *optval, int __user *optlen) | |
3fdadf7d | 890 | { |
ba4e58ec | 891 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 892 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 893 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
894 | } |
895 | ||
896 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
897 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
898 | char __user *optval, int __user *optlen) | |
3fdadf7d | 899 | { |
ba4e58ec | 900 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 901 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 902 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
903 | } |
904 | #endif | |
905 | ||
1da177e4 LT |
906 | static struct inet6_protocol udpv6_protocol = { |
907 | .handler = udpv6_rcv, | |
908 | .err_handler = udpv6_err, | |
909 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
910 | }; | |
911 | ||
912 | /* ------------------------------------------------------------------------ */ | |
913 | #ifdef CONFIG_PROC_FS | |
914 | ||
915 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
916 | { | |
917 | struct inet_sock *inet = inet_sk(sp); | |
918 | struct ipv6_pinfo *np = inet6_sk(sp); | |
919 | struct in6_addr *dest, *src; | |
920 | __u16 destp, srcp; | |
921 | ||
922 | dest = &np->daddr; | |
923 | src = &np->rcv_saddr; | |
924 | destp = ntohs(inet->dport); | |
925 | srcp = ntohs(inet->sport); | |
926 | seq_printf(seq, | |
927 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
928 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
929 | bucket, | |
930 | src->s6_addr32[0], src->s6_addr32[1], | |
931 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
932 | dest->s6_addr32[0], dest->s6_addr32[1], | |
933 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 934 | sp->sk_state, |
1da177e4 LT |
935 | atomic_read(&sp->sk_wmem_alloc), |
936 | atomic_read(&sp->sk_rmem_alloc), | |
937 | 0, 0L, 0, | |
938 | sock_i_uid(sp), 0, | |
939 | sock_i_ino(sp), | |
940 | atomic_read(&sp->sk_refcnt), sp); | |
941 | } | |
942 | ||
ba4e58ec | 943 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
944 | { |
945 | if (v == SEQ_START_TOKEN) | |
946 | seq_printf(seq, | |
947 | " sl " | |
948 | "local_address " | |
949 | "remote_address " | |
950 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
951 | " uid timeout inode\n"); | |
952 | else | |
953 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
954 | return 0; | |
955 | } | |
956 | ||
957 | static struct file_operations udp6_seq_fops; | |
958 | static struct udp_seq_afinfo udp6_seq_afinfo = { | |
959 | .owner = THIS_MODULE, | |
960 | .name = "udp6", | |
961 | .family = AF_INET6, | |
ba4e58ec | 962 | .hashtable = udp_hash, |
1da177e4 LT |
963 | .seq_show = udp6_seq_show, |
964 | .seq_fops = &udp6_seq_fops, | |
965 | }; | |
966 | ||
967 | int __init udp6_proc_init(void) | |
968 | { | |
969 | return udp_proc_register(&udp6_seq_afinfo); | |
970 | } | |
971 | ||
972 | void udp6_proc_exit(void) { | |
973 | udp_proc_unregister(&udp6_seq_afinfo); | |
974 | } | |
975 | #endif /* CONFIG_PROC_FS */ | |
976 | ||
977 | /* ------------------------------------------------------------------------ */ | |
978 | ||
c5a432f1 ED |
979 | DEFINE_PROTO_INUSE(udpv6) |
980 | ||
1da177e4 | 981 | struct proto udpv6_prot = { |
543d9cfe ACM |
982 | .name = "UDPv6", |
983 | .owner = THIS_MODULE, | |
ba4e58ec | 984 | .close = udp_lib_close, |
543d9cfe ACM |
985 | .connect = ip6_datagram_connect, |
986 | .disconnect = udp_disconnect, | |
987 | .ioctl = udp_ioctl, | |
988 | .destroy = udpv6_destroy_sock, | |
989 | .setsockopt = udpv6_setsockopt, | |
990 | .getsockopt = udpv6_getsockopt, | |
991 | .sendmsg = udpv6_sendmsg, | |
992 | .recvmsg = udpv6_recvmsg, | |
993 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
994 | .hash = udp_lib_hash, |
995 | .unhash = udp_lib_unhash, | |
543d9cfe ACM |
996 | .get_port = udp_v6_get_port, |
997 | .obj_size = sizeof(struct udp6_sock), | |
3fdadf7d | 998 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
999 | .compat_setsockopt = compat_udpv6_setsockopt, |
1000 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1001 | #endif |
c5a432f1 | 1002 | REF_PROTO_INUSE(udpv6) |
1da177e4 LT |
1003 | }; |
1004 | ||
1da177e4 LT |
1005 | static struct inet_protosw udpv6_protosw = { |
1006 | .type = SOCK_DGRAM, | |
1007 | .protocol = IPPROTO_UDP, | |
1008 | .prot = &udpv6_prot, | |
1009 | .ops = &inet6_dgram_ops, | |
1010 | .capability =-1, | |
1011 | .no_check = UDP_CSUM_DEFAULT, | |
1012 | .flags = INET_PROTOSW_PERMANENT, | |
1013 | }; | |
1014 | ||
1015 | ||
1016 | void __init udpv6_init(void) | |
1017 | { | |
1018 | if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0) | |
1019 | printk(KERN_ERR "udpv6_init: Could not register protocol\n"); | |
1020 | inet6_register_protosw(&udpv6_protosw); | |
1021 | } |