Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * UDP over IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Based on linux/ipv4/udp.c | |
9 | * | |
1da177e4 LT |
10 | * Fixes: |
11 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
12 | * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which | |
13 | * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind | |
14 | * a single port at the same time. | |
15 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data | |
16 | * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | */ | |
23 | ||
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/sockios.h> | |
1da177e4 LT |
28 | #include <linux/net.h> |
29 | #include <linux/in6.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/ipv6.h> | |
33 | #include <linux/icmpv6.h> | |
34 | #include <linux/init.h> | |
1781f7f5 | 35 | #include <linux/module.h> |
3305b80c | 36 | #include <linux/skbuff.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | ||
1da177e4 LT |
39 | #include <net/ndisc.h> |
40 | #include <net/protocol.h> | |
41 | #include <net/transp_v6.h> | |
42 | #include <net/ip6_route.h> | |
1da177e4 | 43 | #include <net/raw.h> |
c752f073 | 44 | #include <net/tcp_states.h> |
1da177e4 LT |
45 | #include <net/ip6_checksum.h> |
46 | #include <net/xfrm.h> | |
47 | ||
48 | #include <linux/proc_fs.h> | |
49 | #include <linux/seq_file.h> | |
ba4e58ec | 50 | #include "udp_impl.h" |
1da177e4 | 51 | |
6ba5a3c5 | 52 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 53 | { |
6ba5a3c5 | 54 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal); |
1da177e4 LT |
55 | } |
56 | ||
fa4d3c62 PE |
57 | static struct sock *__udp6_lib_lookup(struct net *net, |
58 | struct in6_addr *saddr, __be16 sport, | |
ba4e58ec GR |
59 | struct in6_addr *daddr, __be16 dport, |
60 | int dif, struct hlist_head udptable[]) | |
1da177e4 LT |
61 | { |
62 | struct sock *sk, *result = NULL; | |
63 | struct hlist_node *node; | |
64 | unsigned short hnum = ntohs(dport); | |
65 | int badness = -1; | |
66 | ||
1ab1457c | 67 | read_lock(&udp_hash_lock); |
19c7578f | 68 | sk_for_each(sk, node, &udptable[udp_hashfn(net, hnum)]) { |
1da177e4 LT |
69 | struct inet_sock *inet = inet_sk(sk); |
70 | ||
878628fb | 71 | if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum && |
fa4d3c62 | 72 | sk->sk_family == PF_INET6) { |
1da177e4 LT |
73 | struct ipv6_pinfo *np = inet6_sk(sk); |
74 | int score = 0; | |
75 | if (inet->dport) { | |
76 | if (inet->dport != sport) | |
77 | continue; | |
78 | score++; | |
79 | } | |
80 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
81 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
82 | continue; | |
83 | score++; | |
84 | } | |
85 | if (!ipv6_addr_any(&np->daddr)) { | |
86 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
87 | continue; | |
88 | score++; | |
89 | } | |
90 | if (sk->sk_bound_dev_if) { | |
91 | if (sk->sk_bound_dev_if != dif) | |
92 | continue; | |
93 | score++; | |
94 | } | |
add459aa | 95 | if (score == 4) { |
1da177e4 LT |
96 | result = sk; |
97 | break; | |
add459aa | 98 | } else if (score > badness) { |
1da177e4 LT |
99 | result = sk; |
100 | badness = score; | |
101 | } | |
102 | } | |
103 | } | |
104 | if (result) | |
105 | sock_hold(result); | |
1ab1457c | 106 | read_unlock(&udp_hash_lock); |
1da177e4 LT |
107 | return result; |
108 | } | |
109 | ||
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 | 168 | if (!peeked) |
235b9f7a PE |
169 | UDP6_INC_STATS_USER(sock_net(sk), |
170 | UDP_MIB_INDATAGRAMS, is_udplite); | |
cb75994e | 171 | |
1da177e4 LT |
172 | sock_recv_timestamp(msg, sk, skb); |
173 | ||
174 | /* Copy the address. */ | |
175 | if (msg->msg_name) { | |
176 | struct sockaddr_in6 *sin6; | |
1ab1457c | 177 | |
1da177e4 LT |
178 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
179 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 180 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
181 | sin6->sin6_flowinfo = 0; |
182 | sin6->sin6_scope_id = 0; | |
183 | ||
184 | if (skb->protocol == htons(ETH_P_IP)) | |
185 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, | |
eddc9ec5 | 186 | htonl(0xffff), ip_hdr(skb)->saddr); |
1da177e4 | 187 | else { |
0660e03f ACM |
188 | ipv6_addr_copy(&sin6->sin6_addr, |
189 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
190 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
191 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
192 | } | |
193 | ||
194 | } | |
195 | if (skb->protocol == htons(ETH_P_IP)) { | |
196 | if (inet->cmsg_flags) | |
197 | ip_cmsg_recv(msg, skb); | |
198 | } else { | |
199 | if (np->rxopt.all) | |
200 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 201 | } |
1da177e4 LT |
202 | |
203 | err = copied; | |
204 | if (flags & MSG_TRUNC) | |
759e5d00 | 205 | err = ulen; |
1da177e4 LT |
206 | |
207 | out_free: | |
95766fff | 208 | lock_sock(sk); |
1da177e4 | 209 | skb_free_datagram(sk, skb); |
95766fff | 210 | release_sock(sk); |
1da177e4 LT |
211 | out: |
212 | return err; | |
213 | ||
214 | csum_copy_err: | |
95766fff | 215 | lock_sock(sk); |
27ab2568 | 216 | if (!skb_kill_datagram(sk, skb, flags)) |
235b9f7a | 217 | UDP6_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
95766fff | 218 | release_sock(sk); |
1da177e4 | 219 | |
7a0ff716 | 220 | if (flags & MSG_DONTWAIT) |
1da177e4 | 221 | return -EAGAIN; |
1da177e4 LT |
222 | goto try_again; |
223 | } | |
224 | ||
ba4e58ec GR |
225 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
226 | int type, int code, int offset, __be32 info, | |
227 | struct hlist_head udptable[] ) | |
1da177e4 LT |
228 | { |
229 | struct ipv6_pinfo *np; | |
230 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
231 | struct in6_addr *saddr = &hdr->saddr; |
232 | struct in6_addr *daddr = &hdr->daddr; | |
233 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
234 | struct sock *sk; | |
235 | int err; | |
236 | ||
c346dca1 | 237 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 238 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
239 | if (sk == NULL) |
240 | return; | |
241 | ||
242 | np = inet6_sk(sk); | |
243 | ||
244 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
245 | goto out; | |
246 | ||
247 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
248 | goto out; | |
249 | ||
250 | if (np->recverr) | |
251 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
252 | ||
253 | sk->sk_err = err; | |
254 | sk->sk_error_report(sk); | |
255 | out: | |
256 | sock_put(sk); | |
257 | } | |
258 | ||
ba4e58ec GR |
259 | static __inline__ void udpv6_err(struct sk_buff *skb, |
260 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 261 | int code, int offset, __be32 info ) |
ba4e58ec | 262 | { |
77d0d350 | 263 | __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash); |
ba4e58ec GR |
264 | } |
265 | ||
266 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 267 | { |
ba4e58ec | 268 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 269 | int rc; |
b2bf1e26 | 270 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 271 | |
ba4e58ec GR |
272 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
273 | goto drop; | |
1da177e4 | 274 | |
ba4e58ec GR |
275 | /* |
276 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
277 | */ | |
b2bf1e26 | 278 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
279 | |
280 | if (up->pcrlen == 0) { /* full coverage was set */ | |
281 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
282 | " %d while full coverage %d requested\n", | |
283 | UDP_SKB_CB(skb)->cscov, skb->len); | |
284 | goto drop; | |
285 | } | |
286 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
287 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
288 | "too small, need min %d\n", | |
289 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
290 | goto drop; | |
291 | } | |
1da177e4 LT |
292 | } |
293 | ||
1ab6eb62 HX |
294 | if (sk->sk_filter) { |
295 | if (udp_lib_checksum_complete(skb)) | |
296 | goto drop; | |
297 | } | |
ba4e58ec | 298 | |
a18135eb DM |
299 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
300 | /* Note that an ENOMEM error is charged twice */ | |
cb61cb9b | 301 | if (rc == -ENOMEM) { |
ef28d1a2 PE |
302 | UDP6_INC_STATS_BH(sock_net(sk), |
303 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
cb61cb9b ED |
304 | atomic_inc(&sk->sk_drops); |
305 | } | |
ba4e58ec | 306 | goto drop; |
1da177e4 | 307 | } |
cb75994e | 308 | |
1da177e4 | 309 | return 0; |
ba4e58ec | 310 | drop: |
ef28d1a2 | 311 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
312 | kfree_skb(skb); |
313 | return -1; | |
1da177e4 LT |
314 | } |
315 | ||
316 | static struct sock *udp_v6_mcast_next(struct sock *sk, | |
e69a4adc AV |
317 | __be16 loc_port, struct in6_addr *loc_addr, |
318 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
319 | int dif) |
320 | { | |
321 | struct hlist_node *node; | |
322 | struct sock *s = sk; | |
323 | unsigned short num = ntohs(loc_port); | |
324 | ||
325 | sk_for_each_from(s, node) { | |
326 | struct inet_sock *inet = inet_sk(s); | |
327 | ||
3b1e0a65 | 328 | if (sock_net(s) != sock_net(sk)) |
b8ad0cbc DL |
329 | continue; |
330 | ||
95f30b33 | 331 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
332 | struct ipv6_pinfo *np = inet6_sk(s); |
333 | if (inet->dport) { | |
334 | if (inet->dport != rmt_port) | |
335 | continue; | |
336 | } | |
337 | if (!ipv6_addr_any(&np->daddr) && | |
338 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
339 | continue; | |
340 | ||
341 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
342 | continue; | |
343 | ||
344 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
345 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
346 | continue; | |
1da177e4 | 347 | } |
add459aa | 348 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
349 | continue; |
350 | return s; | |
351 | } | |
352 | } | |
353 | return NULL; | |
354 | } | |
355 | ||
356 | /* | |
357 | * Note: called only from the BH handler context, | |
358 | * so we don't need to lock the hashes. | |
359 | */ | |
e3163493 PE |
360 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
361 | struct in6_addr *saddr, struct in6_addr *daddr, | |
362 | struct hlist_head udptable[]) | |
1da177e4 LT |
363 | { |
364 | struct sock *sk, *sk2; | |
4bedb452 | 365 | const struct udphdr *uh = udp_hdr(skb); |
1da177e4 LT |
366 | int dif; |
367 | ||
368 | read_lock(&udp_hash_lock); | |
19c7578f | 369 | sk = sk_head(&udptable[udp_hashfn(net, ntohs(uh->dest))]); |
f2776ff0 | 370 | dif = inet6_iif(skb); |
1da177e4 LT |
371 | sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif); |
372 | if (!sk) { | |
373 | kfree_skb(skb); | |
374 | goto out; | |
375 | } | |
376 | ||
377 | sk2 = sk; | |
378 | while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr, | |
379 | uh->source, saddr, dif))) { | |
380 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
95766fff | 381 | if (buff) { |
d97106ea | 382 | bh_lock_sock(sk2); |
95766fff HA |
383 | if (!sock_owned_by_user(sk2)) |
384 | udpv6_queue_rcv_skb(sk2, buff); | |
385 | else | |
386 | sk_add_backlog(sk2, buff); | |
387 | bh_unlock_sock(sk2); | |
388 | } | |
1da177e4 | 389 | } |
d97106ea | 390 | bh_lock_sock(sk); |
95766fff HA |
391 | if (!sock_owned_by_user(sk)) |
392 | udpv6_queue_rcv_skb(sk, skb); | |
393 | else | |
394 | sk_add_backlog(sk, skb); | |
395 | bh_unlock_sock(sk); | |
1da177e4 LT |
396 | out: |
397 | read_unlock(&udp_hash_lock); | |
ba4e58ec | 398 | return 0; |
1da177e4 LT |
399 | } |
400 | ||
759e5d00 HX |
401 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
402 | int proto) | |
ba4e58ec | 403 | { |
759e5d00 HX |
404 | int err; |
405 | ||
406 | UDP_SKB_CB(skb)->partial_cov = 0; | |
407 | UDP_SKB_CB(skb)->cscov = skb->len; | |
408 | ||
db8dac20 | 409 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
410 | err = udplite_checksum_init(skb, uh); |
411 | if (err) | |
412 | return err; | |
413 | } | |
414 | ||
ba4e58ec GR |
415 | if (uh->check == 0) { |
416 | /* RFC 2460 section 8.1 says that we SHOULD log | |
417 | this error. Well, it is reasonable. | |
418 | */ | |
419 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
420 | return 1; | |
421 | } | |
422 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 423 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 424 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
425 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
426 | ||
60476372 | 427 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
428 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
429 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 430 | skb->len, proto, 0)); |
ba4e58ec | 431 | |
759e5d00 | 432 | return 0; |
ba4e58ec GR |
433 | } |
434 | ||
e5bbef20 | 435 | int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[], |
759e5d00 | 436 | int proto) |
1da177e4 | 437 | { |
1da177e4 | 438 | struct sock *sk; |
1ab1457c | 439 | struct udphdr *uh; |
1da177e4 LT |
440 | struct net_device *dev = skb->dev; |
441 | struct in6_addr *saddr, *daddr; | |
442 | u32 ulen = 0; | |
ef28d1a2 | 443 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
444 | |
445 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
446 | goto short_packet; | |
447 | ||
0660e03f ACM |
448 | saddr = &ipv6_hdr(skb)->saddr; |
449 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 450 | uh = udp_hdr(skb); |
1da177e4 LT |
451 | |
452 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
453 | if (ulen > skb->len) |
454 | goto short_packet; | |
1da177e4 | 455 | |
759e5d00 HX |
456 | if (proto == IPPROTO_UDP) { |
457 | /* UDP validates ulen. */ | |
1da177e4 | 458 | |
ba4e58ec GR |
459 | /* Check for jumbo payload */ |
460 | if (ulen == 0) | |
461 | ulen = skb->len; | |
1da177e4 | 462 | |
ba4e58ec GR |
463 | if (ulen < sizeof(*uh)) |
464 | goto short_packet; | |
1da177e4 | 465 | |
ba4e58ec GR |
466 | if (ulen < skb->len) { |
467 | if (pskb_trim_rcsum(skb, ulen)) | |
468 | goto short_packet; | |
0660e03f ACM |
469 | saddr = &ipv6_hdr(skb)->saddr; |
470 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 471 | uh = udp_hdr(skb); |
ba4e58ec | 472 | } |
ba4e58ec | 473 | } |
1da177e4 | 474 | |
759e5d00 HX |
475 | if (udp6_csum_init(skb, uh, proto)) |
476 | goto discard; | |
477 | ||
1ab1457c YH |
478 | /* |
479 | * Multicast receive code | |
1da177e4 | 480 | */ |
ba4e58ec | 481 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
482 | return __udp6_lib_mcast_deliver(net, skb, |
483 | saddr, daddr, udptable); | |
1da177e4 LT |
484 | |
485 | /* Unicast */ | |
486 | ||
1ab1457c | 487 | /* |
1da177e4 LT |
488 | * check socket cache ... must talk to Alan about his plans |
489 | * for sock caches... i'll skip this for now. | |
490 | */ | |
e3163493 | 491 | sk = __udp6_lib_lookup(net, saddr, uh->source, |
ba4e58ec | 492 | daddr, uh->dest, inet6_iif(skb), udptable); |
1da177e4 LT |
493 | |
494 | if (sk == NULL) { | |
495 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
496 | goto discard; | |
497 | ||
ba4e58ec | 498 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 499 | goto discard; |
ef28d1a2 PE |
500 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
501 | proto == IPPROTO_UDPLITE); | |
1da177e4 LT |
502 | |
503 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
504 | ||
505 | kfree_skb(skb); | |
add459aa | 506 | return 0; |
1da177e4 | 507 | } |
1ab1457c | 508 | |
1da177e4 | 509 | /* deliver */ |
1ab1457c | 510 | |
d97106ea | 511 | bh_lock_sock(sk); |
95766fff HA |
512 | if (!sock_owned_by_user(sk)) |
513 | udpv6_queue_rcv_skb(sk, skb); | |
514 | else | |
515 | sk_add_backlog(sk, skb); | |
516 | bh_unlock_sock(sk); | |
1da177e4 | 517 | sock_put(sk); |
add459aa | 518 | return 0; |
1da177e4 | 519 | |
1ab1457c | 520 | short_packet: |
ba4e58ec | 521 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 522 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 523 | ulen, skb->len); |
1da177e4 LT |
524 | |
525 | discard: | |
ef28d1a2 | 526 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 527 | kfree_skb(skb); |
add459aa | 528 | return 0; |
1da177e4 | 529 | } |
ba4e58ec | 530 | |
e5bbef20 | 531 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 532 | { |
e5bbef20 | 533 | return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP); |
ba4e58ec GR |
534 | } |
535 | ||
1da177e4 LT |
536 | /* |
537 | * Throw away all pending data and cancel the corking. Socket is locked. | |
538 | */ | |
539 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
540 | { | |
541 | struct udp_sock *up = udp_sk(sk); | |
542 | ||
36d926b9 DL |
543 | if (up->pending == AF_INET) |
544 | udp_flush_pending_frames(sk); | |
545 | else if (up->pending) { | |
1da177e4 LT |
546 | up->len = 0; |
547 | up->pending = 0; | |
548 | ip6_flush_pending_frames(sk); | |
1ab1457c | 549 | } |
1da177e4 LT |
550 | } |
551 | ||
552 | /* | |
553 | * Sending | |
554 | */ | |
555 | ||
4c0a6cb0 | 556 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
557 | { |
558 | struct sk_buff *skb; | |
559 | struct udphdr *uh; | |
4c0a6cb0 | 560 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
561 | struct inet_sock *inet = inet_sk(sk); |
562 | struct flowi *fl = &inet->cork.fl; | |
563 | int err = 0; | |
b2bf1e26 | 564 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 565 | __wsum csum = 0; |
1da177e4 LT |
566 | |
567 | /* Grab the skbuff where UDP header space exists. */ | |
568 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
569 | goto out; | |
570 | ||
571 | /* | |
572 | * Create a UDP header | |
573 | */ | |
4bedb452 | 574 | uh = udp_hdr(skb); |
1da177e4 LT |
575 | uh->source = fl->fl_ip_sport; |
576 | uh->dest = fl->fl_ip_dport; | |
577 | uh->len = htons(up->len); | |
578 | uh->check = 0; | |
579 | ||
b2bf1e26 | 580 | if (is_udplite) |
ba4e58ec GR |
581 | csum = udplite_csum_outgoing(sk, skb); |
582 | else | |
583 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 584 | |
ba4e58ec GR |
585 | /* add protocol-dependent pseudo-header */ |
586 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
587 | up->len, fl->proto, csum ); | |
1da177e4 | 588 | if (uh->check == 0) |
f6ab0288 | 589 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 590 | |
1da177e4 LT |
591 | err = ip6_push_pending_frames(sk); |
592 | out: | |
593 | up->len = 0; | |
594 | up->pending = 0; | |
cd562c98 | 595 | if (!err) |
235b9f7a PE |
596 | UDP6_INC_STATS_USER(sock_net(sk), |
597 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
598 | return err; |
599 | } | |
600 | ||
ba4e58ec | 601 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
602 | struct msghdr *msg, size_t len) |
603 | { | |
604 | struct ipv6_txoptions opt_space; | |
605 | struct udp_sock *up = udp_sk(sk); | |
606 | struct inet_sock *inet = inet_sk(sk); | |
607 | struct ipv6_pinfo *np = inet6_sk(sk); | |
608 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
609 | struct in6_addr *daddr, *final_p = NULL, final; | |
610 | struct ipv6_txoptions *opt = NULL; | |
611 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 612 | struct flowi fl; |
1da177e4 LT |
613 | struct dst_entry *dst; |
614 | int addr_len = msg->msg_namelen; | |
615 | int ulen = len; | |
616 | int hlimit = -1; | |
41a1f8ea | 617 | int tclass = -1; |
1da177e4 LT |
618 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
619 | int err; | |
987905de | 620 | int connected = 0; |
b2bf1e26 | 621 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 622 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
623 | |
624 | /* destination address check */ | |
625 | if (sin6) { | |
626 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
627 | return -EINVAL; | |
628 | ||
629 | switch (sin6->sin6_family) { | |
630 | case AF_INET6: | |
631 | if (addr_len < SIN6_LEN_RFC2133) | |
632 | return -EINVAL; | |
633 | daddr = &sin6->sin6_addr; | |
634 | break; | |
635 | case AF_INET: | |
636 | goto do_udp_sendmsg; | |
637 | case AF_UNSPEC: | |
638 | msg->msg_name = sin6 = NULL; | |
639 | msg->msg_namelen = addr_len = 0; | |
640 | daddr = NULL; | |
641 | break; | |
642 | default: | |
643 | return -EINVAL; | |
644 | } | |
645 | } else if (!up->pending) { | |
646 | if (sk->sk_state != TCP_ESTABLISHED) | |
647 | return -EDESTADDRREQ; | |
648 | daddr = &np->daddr; | |
1ab1457c | 649 | } else |
1da177e4 LT |
650 | daddr = NULL; |
651 | ||
652 | if (daddr) { | |
e773e4fa | 653 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
654 | struct sockaddr_in sin; |
655 | sin.sin_family = AF_INET; | |
656 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
657 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
658 | msg->msg_name = &sin; | |
659 | msg->msg_namelen = sizeof(sin); | |
660 | do_udp_sendmsg: | |
661 | if (__ipv6_only_sock(sk)) | |
662 | return -ENETUNREACH; | |
663 | return udp_sendmsg(iocb, sk, msg, len); | |
664 | } | |
665 | } | |
666 | ||
667 | if (up->pending == AF_INET) | |
668 | return udp_sendmsg(iocb, sk, msg, len); | |
669 | ||
670 | /* Rough check on arithmetic overflow, | |
b59e139b | 671 | better check is made in ip6_append_data(). |
1da177e4 LT |
672 | */ |
673 | if (len > INT_MAX - sizeof(struct udphdr)) | |
674 | return -EMSGSIZE; | |
1ab1457c | 675 | |
1da177e4 LT |
676 | if (up->pending) { |
677 | /* | |
678 | * There are pending frames. | |
679 | * The socket lock must be held while it's corked. | |
680 | */ | |
681 | lock_sock(sk); | |
682 | if (likely(up->pending)) { | |
683 | if (unlikely(up->pending != AF_INET6)) { | |
684 | release_sock(sk); | |
685 | return -EAFNOSUPPORT; | |
686 | } | |
687 | dst = NULL; | |
688 | goto do_append_data; | |
689 | } | |
690 | release_sock(sk); | |
691 | } | |
692 | ulen += sizeof(struct udphdr); | |
693 | ||
132a55f3 | 694 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
695 | |
696 | if (sin6) { | |
697 | if (sin6->sin6_port == 0) | |
698 | return -EINVAL; | |
699 | ||
132a55f3 | 700 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
701 | daddr = &sin6->sin6_addr; |
702 | ||
703 | if (np->sndflow) { | |
132a55f3 HX |
704 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
705 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
706 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
707 | if (flowlabel == NULL) |
708 | return -EINVAL; | |
709 | daddr = &flowlabel->dst; | |
710 | } | |
711 | } | |
712 | ||
713 | /* | |
714 | * Otherwise it will be difficult to maintain | |
715 | * sk->sk_dst_cache. | |
716 | */ | |
717 | if (sk->sk_state == TCP_ESTABLISHED && | |
718 | ipv6_addr_equal(daddr, &np->daddr)) | |
719 | daddr = &np->daddr; | |
720 | ||
721 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
722 | sin6->sin6_scope_id && | |
723 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 724 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
725 | } else { |
726 | if (sk->sk_state != TCP_ESTABLISHED) | |
727 | return -EDESTADDRREQ; | |
728 | ||
132a55f3 | 729 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 730 | daddr = &np->daddr; |
132a55f3 | 731 | fl.fl6_flowlabel = np->flow_label; |
987905de | 732 | connected = 1; |
1da177e4 LT |
733 | } |
734 | ||
132a55f3 HX |
735 | if (!fl.oif) |
736 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
737 | |
738 | if (msg->msg_controllen) { | |
739 | opt = &opt_space; | |
740 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
741 | opt->tot_len = sizeof(*opt); | |
742 | ||
91e1908f | 743 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
744 | if (err < 0) { |
745 | fl6_sock_release(flowlabel); | |
746 | return err; | |
747 | } | |
132a55f3 HX |
748 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
749 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
750 | if (flowlabel == NULL) |
751 | return -EINVAL; | |
752 | } | |
753 | if (!(opt->opt_nflen|opt->opt_flen)) | |
754 | opt = NULL; | |
987905de | 755 | connected = 0; |
1da177e4 LT |
756 | } |
757 | if (opt == NULL) | |
758 | opt = np->opt; | |
df9890c3 YH |
759 | if (flowlabel) |
760 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
761 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 762 | |
ba4e58ec | 763 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
764 | if (!ipv6_addr_any(daddr)) |
765 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
766 | else | |
767 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
768 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
769 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
770 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 771 | |
1da177e4 LT |
772 | /* merge ip6_build_xmit from ip6_output */ |
773 | if (opt && opt->srcrt) { | |
774 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
775 | ipv6_addr_copy(&final, &fl.fl6_dst); |
776 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 777 | final_p = &final; |
987905de | 778 | connected = 0; |
1da177e4 LT |
779 | } |
780 | ||
132a55f3 HX |
781 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
782 | fl.oif = np->mcast_oif; | |
987905de MK |
783 | connected = 0; |
784 | } | |
1da177e4 | 785 | |
132a55f3 | 786 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 787 | |
132a55f3 | 788 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
789 | if (err) |
790 | goto out; | |
791 | if (final_p) | |
132a55f3 | 792 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 793 | |
bb72845e | 794 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
795 | if (err == -EREMOTE) |
796 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
797 | if (err < 0) | |
798 | goto out; | |
799 | } | |
1da177e4 LT |
800 | |
801 | if (hlimit < 0) { | |
132a55f3 | 802 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
803 | hlimit = np->mcast_hops; |
804 | else | |
805 | hlimit = np->hop_limit; | |
806 | if (hlimit < 0) | |
6b75d090 | 807 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
808 | } |
809 | ||
41a1f8ea YH |
810 | if (tclass < 0) { |
811 | tclass = np->tclass; | |
812 | if (tclass < 0) | |
813 | tclass = 0; | |
814 | } | |
815 | ||
1da177e4 LT |
816 | if (msg->msg_flags&MSG_CONFIRM) |
817 | goto do_confirm; | |
818 | back_from_confirm: | |
819 | ||
820 | lock_sock(sk); | |
821 | if (unlikely(up->pending)) { | |
822 | /* The socket is already corked while preparing it. */ | |
823 | /* ... which is an evident application bug. --ANK */ | |
824 | release_sock(sk); | |
825 | ||
64ce2073 | 826 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
827 | err = -EINVAL; |
828 | goto out; | |
829 | } | |
830 | ||
831 | up->pending = AF_INET6; | |
832 | ||
833 | do_append_data: | |
834 | up->len += ulen; | |
ba4e58ec GR |
835 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
836 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 837 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
838 | (struct rt6_info*)dst, |
839 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
840 | if (err) |
841 | udp_v6_flush_pending_frames(sk); | |
842 | else if (!corkreq) | |
4c0a6cb0 | 843 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
844 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
845 | up->pending = 0; | |
1da177e4 | 846 | |
a5e7c210 DM |
847 | if (dst) { |
848 | if (connected) { | |
849 | ip6_dst_store(sk, dst, | |
132a55f3 | 850 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
851 | &np->daddr : NULL, |
852 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 853 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
854 | &np->saddr : |
855 | #endif | |
856 | NULL); | |
a5e7c210 DM |
857 | } else { |
858 | dst_release(dst); | |
859 | } | |
a3c96089 | 860 | dst = NULL; |
a5e7c210 DM |
861 | } |
862 | ||
1da177e4 LT |
863 | if (err > 0) |
864 | err = np->recverr ? net_xmit_errno(err) : 0; | |
865 | release_sock(sk); | |
866 | out: | |
a3c96089 | 867 | dst_release(dst); |
1da177e4 | 868 | fl6_sock_release(flowlabel); |
cd562c98 | 869 | if (!err) |
1da177e4 | 870 | return len; |
a18135eb DM |
871 | /* |
872 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
873 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
874 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
875 | * things). We could add another new stat but at least for now that | |
876 | * seems like overkill. | |
877 | */ | |
878 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
879 | UDP6_INC_STATS_USER(sock_net(sk), |
880 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 881 | } |
1da177e4 LT |
882 | return err; |
883 | ||
884 | do_confirm: | |
885 | dst_confirm(dst); | |
886 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
887 | goto back_from_confirm; | |
888 | err = 0; | |
889 | goto out; | |
890 | } | |
891 | ||
7d06b2e0 | 892 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
893 | { |
894 | lock_sock(sk); | |
895 | udp_v6_flush_pending_frames(sk); | |
896 | release_sock(sk); | |
897 | ||
898 | inet6_destroy_sock(sk); | |
1da177e4 LT |
899 | } |
900 | ||
901 | /* | |
902 | * Socket option code for UDP | |
903 | */ | |
ba4e58ec GR |
904 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
905 | char __user *optval, int optlen) | |
3fdadf7d | 906 | { |
db8dac20 | 907 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
908 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
909 | udp_v6_push_pending_frames); | |
ba4e58ec | 910 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
911 | } |
912 | ||
913 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
914 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
915 | char __user *optval, int optlen) | |
3fdadf7d | 916 | { |
db8dac20 | 917 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
918 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
919 | udp_v6_push_pending_frames); | |
ba4e58ec | 920 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
921 | } |
922 | #endif | |
923 | ||
ba4e58ec GR |
924 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
925 | char __user *optval, int __user *optlen) | |
3fdadf7d | 926 | { |
db8dac20 | 927 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 928 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 929 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
930 | } |
931 | ||
932 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
933 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
934 | char __user *optval, int __user *optlen) | |
3fdadf7d | 935 | { |
db8dac20 | 936 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 937 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 938 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
939 | } |
940 | #endif | |
941 | ||
1da177e4 LT |
942 | static struct inet6_protocol udpv6_protocol = { |
943 | .handler = udpv6_rcv, | |
944 | .err_handler = udpv6_err, | |
945 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
946 | }; | |
947 | ||
948 | /* ------------------------------------------------------------------------ */ | |
949 | #ifdef CONFIG_PROC_FS | |
950 | ||
951 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
952 | { | |
953 | struct inet_sock *inet = inet_sk(sp); | |
954 | struct ipv6_pinfo *np = inet6_sk(sp); | |
955 | struct in6_addr *dest, *src; | |
956 | __u16 destp, srcp; | |
957 | ||
958 | dest = &np->daddr; | |
959 | src = &np->rcv_saddr; | |
960 | destp = ntohs(inet->dport); | |
961 | srcp = ntohs(inet->sport); | |
962 | seq_printf(seq, | |
963 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
cb61cb9b | 964 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
965 | bucket, |
966 | src->s6_addr32[0], src->s6_addr32[1], | |
967 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
968 | dest->s6_addr32[0], dest->s6_addr32[1], | |
969 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 970 | sp->sk_state, |
1da177e4 LT |
971 | atomic_read(&sp->sk_wmem_alloc), |
972 | atomic_read(&sp->sk_rmem_alloc), | |
973 | 0, 0L, 0, | |
974 | sock_i_uid(sp), 0, | |
975 | sock_i_ino(sp), | |
cb61cb9b ED |
976 | atomic_read(&sp->sk_refcnt), sp, |
977 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
978 | } |
979 | ||
ba4e58ec | 980 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
981 | { |
982 | if (v == SEQ_START_TOKEN) | |
983 | seq_printf(seq, | |
984 | " sl " | |
985 | "local_address " | |
986 | "remote_address " | |
987 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 988 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
989 | else |
990 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
991 | return 0; | |
992 | } | |
993 | ||
1da177e4 | 994 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
995 | .name = "udp6", |
996 | .family = AF_INET6, | |
ba4e58ec | 997 | .hashtable = udp_hash, |
4ad96d39 DL |
998 | .seq_fops = { |
999 | .owner = THIS_MODULE, | |
1000 | }, | |
dda61925 DL |
1001 | .seq_ops = { |
1002 | .show = udp6_seq_show, | |
1003 | }, | |
1da177e4 LT |
1004 | }; |
1005 | ||
0c96d8c5 | 1006 | int udp6_proc_init(struct net *net) |
1da177e4 | 1007 | { |
0c96d8c5 | 1008 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1009 | } |
1010 | ||
0c96d8c5 DL |
1011 | void udp6_proc_exit(struct net *net) { |
1012 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1013 | } |
1014 | #endif /* CONFIG_PROC_FS */ | |
1015 | ||
1016 | /* ------------------------------------------------------------------------ */ | |
1017 | ||
1018 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1019 | .name = "UDPv6", |
1020 | .owner = THIS_MODULE, | |
ba4e58ec | 1021 | .close = udp_lib_close, |
543d9cfe ACM |
1022 | .connect = ip6_datagram_connect, |
1023 | .disconnect = udp_disconnect, | |
1024 | .ioctl = udp_ioctl, | |
1025 | .destroy = udpv6_destroy_sock, | |
1026 | .setsockopt = udpv6_setsockopt, | |
1027 | .getsockopt = udpv6_getsockopt, | |
1028 | .sendmsg = udpv6_sendmsg, | |
1029 | .recvmsg = udpv6_recvmsg, | |
1030 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1031 | .hash = udp_lib_hash, |
1032 | .unhash = udp_lib_unhash, | |
543d9cfe | 1033 | .get_port = udp_v6_get_port, |
95766fff HA |
1034 | .memory_allocated = &udp_memory_allocated, |
1035 | .sysctl_mem = sysctl_udp_mem, | |
1036 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1037 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1038 | .obj_size = sizeof(struct udp6_sock), |
6ba5a3c5 | 1039 | .h.udp_hash = udp_hash, |
3fdadf7d | 1040 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1041 | .compat_setsockopt = compat_udpv6_setsockopt, |
1042 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1043 | #endif |
1da177e4 LT |
1044 | }; |
1045 | ||
1da177e4 LT |
1046 | static struct inet_protosw udpv6_protosw = { |
1047 | .type = SOCK_DGRAM, | |
1048 | .protocol = IPPROTO_UDP, | |
1049 | .prot = &udpv6_prot, | |
1050 | .ops = &inet6_dgram_ops, | |
1051 | .capability =-1, | |
1052 | .no_check = UDP_CSUM_DEFAULT, | |
1053 | .flags = INET_PROTOSW_PERMANENT, | |
1054 | }; | |
1055 | ||
1056 | ||
7f4e4868 | 1057 | int __init udpv6_init(void) |
1da177e4 | 1058 | { |
7f4e4868 DL |
1059 | int ret; |
1060 | ||
1061 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1062 | if (ret) | |
1063 | goto out; | |
1064 | ||
1065 | ret = inet6_register_protosw(&udpv6_protosw); | |
1066 | if (ret) | |
1067 | goto out_udpv6_protocol; | |
1068 | out: | |
1069 | return ret; | |
1070 | ||
1071 | out_udpv6_protocol: | |
1072 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1073 | goto out; | |
1074 | } | |
1075 | ||
09f7709f | 1076 | void udpv6_exit(void) |
7f4e4868 DL |
1077 | { |
1078 | inet6_unregister_protosw(&udpv6_protosw); | |
1079 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1080 | } |