]>
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 | ||
645ca708 ED |
57 | static inline int compute_score(struct sock *sk, struct net *net, |
58 | unsigned short hnum, | |
59 | struct in6_addr *saddr, __be16 sport, | |
60 | struct in6_addr *daddr, __be16 dport, | |
61 | int dif) | |
62 | { | |
63 | int score = -1; | |
64 | ||
65 | if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum && | |
66 | sk->sk_family == PF_INET6) { | |
67 | struct ipv6_pinfo *np = inet6_sk(sk); | |
68 | struct inet_sock *inet = inet_sk(sk); | |
69 | ||
70 | score = 0; | |
71 | if (inet->dport) { | |
72 | if (inet->dport != sport) | |
73 | return -1; | |
74 | score++; | |
75 | } | |
76 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
77 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
78 | return -1; | |
79 | score++; | |
80 | } | |
81 | if (!ipv6_addr_any(&np->daddr)) { | |
82 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
83 | return -1; | |
84 | score++; | |
85 | } | |
86 | if (sk->sk_bound_dev_if) { | |
87 | if (sk->sk_bound_dev_if != dif) | |
88 | return -1; | |
89 | score++; | |
90 | } | |
91 | } | |
92 | return score; | |
93 | } | |
94 | ||
fa4d3c62 PE |
95 | static struct sock *__udp6_lib_lookup(struct net *net, |
96 | struct in6_addr *saddr, __be16 sport, | |
ba4e58ec | 97 | struct in6_addr *daddr, __be16 dport, |
645ca708 | 98 | int dif, struct udp_table *udptable) |
1da177e4 LT |
99 | { |
100 | struct sock *sk, *result = NULL; | |
101 | struct hlist_node *node; | |
102 | unsigned short hnum = ntohs(dport); | |
645ca708 ED |
103 | unsigned int hash = udp_hashfn(net, hnum); |
104 | struct udp_hslot *hslot = &udptable->hash[hash]; | |
105 | int score, badness = -1; | |
106 | ||
107 | spin_lock(&hslot->lock); | |
108 | sk_for_each(sk, node, &hslot->head) { | |
109 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); | |
110 | if (score > badness) { | |
111 | result = sk; | |
112 | badness = score; | |
1da177e4 LT |
113 | } |
114 | } | |
115 | if (result) | |
116 | sock_hold(result); | |
645ca708 | 117 | spin_unlock(&hslot->lock); |
1da177e4 LT |
118 | return result; |
119 | } | |
120 | ||
607c4aaf KK |
121 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
122 | __be16 sport, __be16 dport, | |
645ca708 | 123 | struct udp_table *udptable) |
607c4aaf | 124 | { |
23542618 | 125 | struct sock *sk; |
607c4aaf KK |
126 | struct ipv6hdr *iph = ipv6_hdr(skb); |
127 | ||
23542618 KK |
128 | if (unlikely(sk = skb_steal_sock(skb))) |
129 | return sk; | |
130 | else | |
131 | return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport, | |
132 | &iph->daddr, dport, inet6_iif(skb), | |
133 | udptable); | |
607c4aaf KK |
134 | } |
135 | ||
1da177e4 LT |
136 | /* |
137 | * This should be easy, if there is something there we | |
138 | * return it, otherwise we block. | |
139 | */ | |
140 | ||
ba4e58ec | 141 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
142 | struct msghdr *msg, size_t len, |
143 | int noblock, int flags, int *addr_len) | |
144 | { | |
145 | struct ipv6_pinfo *np = inet6_sk(sk); | |
146 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 147 | struct sk_buff *skb; |
759e5d00 | 148 | unsigned int ulen, copied; |
a59322be | 149 | int peeked; |
759e5d00 HX |
150 | int err; |
151 | int is_udplite = IS_UDPLITE(sk); | |
1da177e4 | 152 | |
1ab1457c YH |
153 | if (addr_len) |
154 | *addr_len=sizeof(struct sockaddr_in6); | |
155 | ||
1da177e4 LT |
156 | if (flags & MSG_ERRQUEUE) |
157 | return ipv6_recv_error(sk, msg, len); | |
158 | ||
159 | try_again: | |
a59322be HX |
160 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
161 | &peeked, &err); | |
1da177e4 LT |
162 | if (!skb) |
163 | goto out; | |
164 | ||
759e5d00 HX |
165 | ulen = skb->len - sizeof(struct udphdr); |
166 | copied = len; | |
167 | if (copied > ulen) | |
168 | copied = ulen; | |
169 | else if (copied < ulen) | |
1ab1457c | 170 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 171 | |
ba4e58ec | 172 | /* |
759e5d00 HX |
173 | * If checksum is needed at all, try to do it while copying the |
174 | * data. If the data is truncated, or if we only want a partial | |
175 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 176 | */ |
ba4e58ec | 177 | |
759e5d00 HX |
178 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
179 | if (udp_lib_checksum_complete(skb)) | |
1da177e4 | 180 | goto csum_copy_err; |
ba4e58ec GR |
181 | } |
182 | ||
60476372 | 183 | if (skb_csum_unnecessary(skb)) |
ba4e58ec GR |
184 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
185 | msg->msg_iov, copied ); | |
186 | else { | |
1da177e4 LT |
187 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
188 | if (err == -EINVAL) | |
189 | goto csum_copy_err; | |
190 | } | |
191 | if (err) | |
192 | goto out_free; | |
193 | ||
a59322be | 194 | if (!peeked) |
235b9f7a PE |
195 | UDP6_INC_STATS_USER(sock_net(sk), |
196 | UDP_MIB_INDATAGRAMS, is_udplite); | |
cb75994e | 197 | |
1da177e4 LT |
198 | sock_recv_timestamp(msg, sk, skb); |
199 | ||
200 | /* Copy the address. */ | |
201 | if (msg->msg_name) { | |
202 | struct sockaddr_in6 *sin6; | |
1ab1457c | 203 | |
1da177e4 LT |
204 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
205 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 206 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
207 | sin6->sin6_flowinfo = 0; |
208 | sin6->sin6_scope_id = 0; | |
209 | ||
210 | if (skb->protocol == htons(ETH_P_IP)) | |
211 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, | |
eddc9ec5 | 212 | htonl(0xffff), ip_hdr(skb)->saddr); |
1da177e4 | 213 | else { |
0660e03f ACM |
214 | ipv6_addr_copy(&sin6->sin6_addr, |
215 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
216 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
217 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
218 | } | |
219 | ||
220 | } | |
221 | if (skb->protocol == htons(ETH_P_IP)) { | |
222 | if (inet->cmsg_flags) | |
223 | ip_cmsg_recv(msg, skb); | |
224 | } else { | |
225 | if (np->rxopt.all) | |
226 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 227 | } |
1da177e4 LT |
228 | |
229 | err = copied; | |
230 | if (flags & MSG_TRUNC) | |
759e5d00 | 231 | err = ulen; |
1da177e4 LT |
232 | |
233 | out_free: | |
95766fff | 234 | lock_sock(sk); |
1da177e4 | 235 | skb_free_datagram(sk, skb); |
95766fff | 236 | release_sock(sk); |
1da177e4 LT |
237 | out: |
238 | return err; | |
239 | ||
240 | csum_copy_err: | |
95766fff | 241 | lock_sock(sk); |
27ab2568 | 242 | if (!skb_kill_datagram(sk, skb, flags)) |
235b9f7a | 243 | UDP6_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
95766fff | 244 | release_sock(sk); |
1da177e4 | 245 | |
7a0ff716 | 246 | if (flags & MSG_DONTWAIT) |
1da177e4 | 247 | return -EAGAIN; |
1da177e4 LT |
248 | goto try_again; |
249 | } | |
250 | ||
ba4e58ec GR |
251 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
252 | int type, int code, int offset, __be32 info, | |
645ca708 | 253 | struct udp_table *udptable) |
1da177e4 LT |
254 | { |
255 | struct ipv6_pinfo *np; | |
256 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
257 | struct in6_addr *saddr = &hdr->saddr; |
258 | struct in6_addr *daddr = &hdr->daddr; | |
259 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
260 | struct sock *sk; | |
261 | int err; | |
262 | ||
c346dca1 | 263 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 264 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
265 | if (sk == NULL) |
266 | return; | |
267 | ||
268 | np = inet6_sk(sk); | |
269 | ||
270 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
271 | goto out; | |
272 | ||
273 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
274 | goto out; | |
275 | ||
276 | if (np->recverr) | |
277 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
278 | ||
279 | sk->sk_err = err; | |
280 | sk->sk_error_report(sk); | |
281 | out: | |
282 | sock_put(sk); | |
283 | } | |
284 | ||
ba4e58ec GR |
285 | static __inline__ void udpv6_err(struct sk_buff *skb, |
286 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 287 | int code, int offset, __be32 info ) |
ba4e58ec | 288 | { |
645ca708 | 289 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
290 | } |
291 | ||
292 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 293 | { |
ba4e58ec | 294 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 295 | int rc; |
b2bf1e26 | 296 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 297 | |
ba4e58ec GR |
298 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
299 | goto drop; | |
1da177e4 | 300 | |
ba4e58ec GR |
301 | /* |
302 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
303 | */ | |
b2bf1e26 | 304 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
305 | |
306 | if (up->pcrlen == 0) { /* full coverage was set */ | |
307 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
308 | " %d while full coverage %d requested\n", | |
309 | UDP_SKB_CB(skb)->cscov, skb->len); | |
310 | goto drop; | |
311 | } | |
312 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
313 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
314 | "too small, need min %d\n", | |
315 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
316 | goto drop; | |
317 | } | |
1da177e4 LT |
318 | } |
319 | ||
1ab6eb62 HX |
320 | if (sk->sk_filter) { |
321 | if (udp_lib_checksum_complete(skb)) | |
322 | goto drop; | |
323 | } | |
ba4e58ec | 324 | |
a18135eb DM |
325 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
326 | /* Note that an ENOMEM error is charged twice */ | |
cb61cb9b | 327 | if (rc == -ENOMEM) { |
ef28d1a2 PE |
328 | UDP6_INC_STATS_BH(sock_net(sk), |
329 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
cb61cb9b ED |
330 | atomic_inc(&sk->sk_drops); |
331 | } | |
ba4e58ec | 332 | goto drop; |
1da177e4 | 333 | } |
cb75994e | 334 | |
1da177e4 | 335 | return 0; |
ba4e58ec | 336 | drop: |
ef28d1a2 | 337 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
338 | kfree_skb(skb); |
339 | return -1; | |
1da177e4 LT |
340 | } |
341 | ||
342 | static struct sock *udp_v6_mcast_next(struct sock *sk, | |
e69a4adc AV |
343 | __be16 loc_port, struct in6_addr *loc_addr, |
344 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
345 | int dif) |
346 | { | |
347 | struct hlist_node *node; | |
348 | struct sock *s = sk; | |
349 | unsigned short num = ntohs(loc_port); | |
350 | ||
351 | sk_for_each_from(s, node) { | |
352 | struct inet_sock *inet = inet_sk(s); | |
353 | ||
3b1e0a65 | 354 | if (sock_net(s) != sock_net(sk)) |
b8ad0cbc DL |
355 | continue; |
356 | ||
95f30b33 | 357 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
358 | struct ipv6_pinfo *np = inet6_sk(s); |
359 | if (inet->dport) { | |
360 | if (inet->dport != rmt_port) | |
361 | continue; | |
362 | } | |
363 | if (!ipv6_addr_any(&np->daddr) && | |
364 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
365 | continue; | |
366 | ||
367 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
368 | continue; | |
369 | ||
370 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
371 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
372 | continue; | |
1da177e4 | 373 | } |
add459aa | 374 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
375 | continue; |
376 | return s; | |
377 | } | |
378 | } | |
379 | return NULL; | |
380 | } | |
381 | ||
382 | /* | |
383 | * Note: called only from the BH handler context, | |
384 | * so we don't need to lock the hashes. | |
385 | */ | |
e3163493 PE |
386 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
387 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 388 | struct udp_table *udptable) |
1da177e4 LT |
389 | { |
390 | struct sock *sk, *sk2; | |
4bedb452 | 391 | const struct udphdr *uh = udp_hdr(skb); |
645ca708 | 392 | struct udp_hslot *hslot = &udptable->hash[udp_hashfn(net, ntohs(uh->dest))]; |
1da177e4 LT |
393 | int dif; |
394 | ||
645ca708 ED |
395 | spin_lock(&hslot->lock); |
396 | sk = sk_head(&hslot->head); | |
f2776ff0 | 397 | dif = inet6_iif(skb); |
1da177e4 LT |
398 | sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif); |
399 | if (!sk) { | |
400 | kfree_skb(skb); | |
401 | goto out; | |
402 | } | |
403 | ||
404 | sk2 = sk; | |
405 | while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr, | |
406 | uh->source, saddr, dif))) { | |
407 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
95766fff | 408 | if (buff) { |
d97106ea | 409 | bh_lock_sock(sk2); |
95766fff HA |
410 | if (!sock_owned_by_user(sk2)) |
411 | udpv6_queue_rcv_skb(sk2, buff); | |
412 | else | |
413 | sk_add_backlog(sk2, buff); | |
414 | bh_unlock_sock(sk2); | |
415 | } | |
1da177e4 | 416 | } |
d97106ea | 417 | bh_lock_sock(sk); |
95766fff HA |
418 | if (!sock_owned_by_user(sk)) |
419 | udpv6_queue_rcv_skb(sk, skb); | |
420 | else | |
421 | sk_add_backlog(sk, skb); | |
422 | bh_unlock_sock(sk); | |
1da177e4 | 423 | out: |
645ca708 | 424 | spin_unlock(&hslot->lock); |
ba4e58ec | 425 | return 0; |
1da177e4 LT |
426 | } |
427 | ||
759e5d00 HX |
428 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
429 | int proto) | |
ba4e58ec | 430 | { |
759e5d00 HX |
431 | int err; |
432 | ||
433 | UDP_SKB_CB(skb)->partial_cov = 0; | |
434 | UDP_SKB_CB(skb)->cscov = skb->len; | |
435 | ||
db8dac20 | 436 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
437 | err = udplite_checksum_init(skb, uh); |
438 | if (err) | |
439 | return err; | |
440 | } | |
441 | ||
ba4e58ec GR |
442 | if (uh->check == 0) { |
443 | /* RFC 2460 section 8.1 says that we SHOULD log | |
444 | this error. Well, it is reasonable. | |
445 | */ | |
446 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
447 | return 1; | |
448 | } | |
449 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 450 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 451 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
452 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
453 | ||
60476372 | 454 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
455 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
456 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 457 | skb->len, proto, 0)); |
ba4e58ec | 458 | |
759e5d00 | 459 | return 0; |
ba4e58ec GR |
460 | } |
461 | ||
645ca708 | 462 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 463 | int proto) |
1da177e4 | 464 | { |
1da177e4 | 465 | struct sock *sk; |
1ab1457c | 466 | struct udphdr *uh; |
1da177e4 LT |
467 | struct net_device *dev = skb->dev; |
468 | struct in6_addr *saddr, *daddr; | |
469 | u32 ulen = 0; | |
ef28d1a2 | 470 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
471 | |
472 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
473 | goto short_packet; | |
474 | ||
0660e03f ACM |
475 | saddr = &ipv6_hdr(skb)->saddr; |
476 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 477 | uh = udp_hdr(skb); |
1da177e4 LT |
478 | |
479 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
480 | if (ulen > skb->len) |
481 | goto short_packet; | |
1da177e4 | 482 | |
759e5d00 HX |
483 | if (proto == IPPROTO_UDP) { |
484 | /* UDP validates ulen. */ | |
1da177e4 | 485 | |
ba4e58ec GR |
486 | /* Check for jumbo payload */ |
487 | if (ulen == 0) | |
488 | ulen = skb->len; | |
1da177e4 | 489 | |
ba4e58ec GR |
490 | if (ulen < sizeof(*uh)) |
491 | goto short_packet; | |
1da177e4 | 492 | |
ba4e58ec GR |
493 | if (ulen < skb->len) { |
494 | if (pskb_trim_rcsum(skb, ulen)) | |
495 | goto short_packet; | |
0660e03f ACM |
496 | saddr = &ipv6_hdr(skb)->saddr; |
497 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 498 | uh = udp_hdr(skb); |
ba4e58ec | 499 | } |
ba4e58ec | 500 | } |
1da177e4 | 501 | |
759e5d00 HX |
502 | if (udp6_csum_init(skb, uh, proto)) |
503 | goto discard; | |
504 | ||
1ab1457c YH |
505 | /* |
506 | * Multicast receive code | |
1da177e4 | 507 | */ |
ba4e58ec | 508 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
509 | return __udp6_lib_mcast_deliver(net, skb, |
510 | saddr, daddr, udptable); | |
1da177e4 LT |
511 | |
512 | /* Unicast */ | |
513 | ||
1ab1457c | 514 | /* |
1da177e4 LT |
515 | * check socket cache ... must talk to Alan about his plans |
516 | * for sock caches... i'll skip this for now. | |
517 | */ | |
607c4aaf | 518 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
519 | |
520 | if (sk == NULL) { | |
521 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
522 | goto discard; | |
523 | ||
ba4e58ec | 524 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 525 | goto discard; |
ef28d1a2 PE |
526 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
527 | proto == IPPROTO_UDPLITE); | |
1da177e4 LT |
528 | |
529 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
530 | ||
531 | kfree_skb(skb); | |
add459aa | 532 | return 0; |
1da177e4 | 533 | } |
1ab1457c | 534 | |
1da177e4 | 535 | /* deliver */ |
1ab1457c | 536 | |
d97106ea | 537 | bh_lock_sock(sk); |
95766fff HA |
538 | if (!sock_owned_by_user(sk)) |
539 | udpv6_queue_rcv_skb(sk, skb); | |
540 | else | |
541 | sk_add_backlog(sk, skb); | |
542 | bh_unlock_sock(sk); | |
1da177e4 | 543 | sock_put(sk); |
add459aa | 544 | return 0; |
1da177e4 | 545 | |
1ab1457c | 546 | short_packet: |
ba4e58ec | 547 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 548 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 549 | ulen, skb->len); |
1da177e4 LT |
550 | |
551 | discard: | |
ef28d1a2 | 552 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 553 | kfree_skb(skb); |
add459aa | 554 | return 0; |
1da177e4 | 555 | } |
ba4e58ec | 556 | |
e5bbef20 | 557 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 558 | { |
645ca708 | 559 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
560 | } |
561 | ||
1da177e4 LT |
562 | /* |
563 | * Throw away all pending data and cancel the corking. Socket is locked. | |
564 | */ | |
565 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
566 | { | |
567 | struct udp_sock *up = udp_sk(sk); | |
568 | ||
36d926b9 DL |
569 | if (up->pending == AF_INET) |
570 | udp_flush_pending_frames(sk); | |
571 | else if (up->pending) { | |
1da177e4 LT |
572 | up->len = 0; |
573 | up->pending = 0; | |
574 | ip6_flush_pending_frames(sk); | |
1ab1457c | 575 | } |
1da177e4 LT |
576 | } |
577 | ||
578 | /* | |
579 | * Sending | |
580 | */ | |
581 | ||
4c0a6cb0 | 582 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
583 | { |
584 | struct sk_buff *skb; | |
585 | struct udphdr *uh; | |
4c0a6cb0 | 586 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
587 | struct inet_sock *inet = inet_sk(sk); |
588 | struct flowi *fl = &inet->cork.fl; | |
589 | int err = 0; | |
b2bf1e26 | 590 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 591 | __wsum csum = 0; |
1da177e4 LT |
592 | |
593 | /* Grab the skbuff where UDP header space exists. */ | |
594 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
595 | goto out; | |
596 | ||
597 | /* | |
598 | * Create a UDP header | |
599 | */ | |
4bedb452 | 600 | uh = udp_hdr(skb); |
1da177e4 LT |
601 | uh->source = fl->fl_ip_sport; |
602 | uh->dest = fl->fl_ip_dport; | |
603 | uh->len = htons(up->len); | |
604 | uh->check = 0; | |
605 | ||
b2bf1e26 | 606 | if (is_udplite) |
ba4e58ec GR |
607 | csum = udplite_csum_outgoing(sk, skb); |
608 | else | |
609 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 610 | |
ba4e58ec GR |
611 | /* add protocol-dependent pseudo-header */ |
612 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
613 | up->len, fl->proto, csum ); | |
1da177e4 | 614 | if (uh->check == 0) |
f6ab0288 | 615 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 616 | |
1da177e4 LT |
617 | err = ip6_push_pending_frames(sk); |
618 | out: | |
619 | up->len = 0; | |
620 | up->pending = 0; | |
cd562c98 | 621 | if (!err) |
235b9f7a PE |
622 | UDP6_INC_STATS_USER(sock_net(sk), |
623 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
624 | return err; |
625 | } | |
626 | ||
ba4e58ec | 627 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
628 | struct msghdr *msg, size_t len) |
629 | { | |
630 | struct ipv6_txoptions opt_space; | |
631 | struct udp_sock *up = udp_sk(sk); | |
632 | struct inet_sock *inet = inet_sk(sk); | |
633 | struct ipv6_pinfo *np = inet6_sk(sk); | |
634 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
635 | struct in6_addr *daddr, *final_p = NULL, final; | |
636 | struct ipv6_txoptions *opt = NULL; | |
637 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 638 | struct flowi fl; |
1da177e4 LT |
639 | struct dst_entry *dst; |
640 | int addr_len = msg->msg_namelen; | |
641 | int ulen = len; | |
642 | int hlimit = -1; | |
41a1f8ea | 643 | int tclass = -1; |
1da177e4 LT |
644 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
645 | int err; | |
987905de | 646 | int connected = 0; |
b2bf1e26 | 647 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 648 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
649 | |
650 | /* destination address check */ | |
651 | if (sin6) { | |
652 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
653 | return -EINVAL; | |
654 | ||
655 | switch (sin6->sin6_family) { | |
656 | case AF_INET6: | |
657 | if (addr_len < SIN6_LEN_RFC2133) | |
658 | return -EINVAL; | |
659 | daddr = &sin6->sin6_addr; | |
660 | break; | |
661 | case AF_INET: | |
662 | goto do_udp_sendmsg; | |
663 | case AF_UNSPEC: | |
664 | msg->msg_name = sin6 = NULL; | |
665 | msg->msg_namelen = addr_len = 0; | |
666 | daddr = NULL; | |
667 | break; | |
668 | default: | |
669 | return -EINVAL; | |
670 | } | |
671 | } else if (!up->pending) { | |
672 | if (sk->sk_state != TCP_ESTABLISHED) | |
673 | return -EDESTADDRREQ; | |
674 | daddr = &np->daddr; | |
1ab1457c | 675 | } else |
1da177e4 LT |
676 | daddr = NULL; |
677 | ||
678 | if (daddr) { | |
e773e4fa | 679 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
680 | struct sockaddr_in sin; |
681 | sin.sin_family = AF_INET; | |
682 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
683 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
684 | msg->msg_name = &sin; | |
685 | msg->msg_namelen = sizeof(sin); | |
686 | do_udp_sendmsg: | |
687 | if (__ipv6_only_sock(sk)) | |
688 | return -ENETUNREACH; | |
689 | return udp_sendmsg(iocb, sk, msg, len); | |
690 | } | |
691 | } | |
692 | ||
693 | if (up->pending == AF_INET) | |
694 | return udp_sendmsg(iocb, sk, msg, len); | |
695 | ||
696 | /* Rough check on arithmetic overflow, | |
b59e139b | 697 | better check is made in ip6_append_data(). |
1da177e4 LT |
698 | */ |
699 | if (len > INT_MAX - sizeof(struct udphdr)) | |
700 | return -EMSGSIZE; | |
1ab1457c | 701 | |
1da177e4 LT |
702 | if (up->pending) { |
703 | /* | |
704 | * There are pending frames. | |
705 | * The socket lock must be held while it's corked. | |
706 | */ | |
707 | lock_sock(sk); | |
708 | if (likely(up->pending)) { | |
709 | if (unlikely(up->pending != AF_INET6)) { | |
710 | release_sock(sk); | |
711 | return -EAFNOSUPPORT; | |
712 | } | |
713 | dst = NULL; | |
714 | goto do_append_data; | |
715 | } | |
716 | release_sock(sk); | |
717 | } | |
718 | ulen += sizeof(struct udphdr); | |
719 | ||
132a55f3 | 720 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
721 | |
722 | if (sin6) { | |
723 | if (sin6->sin6_port == 0) | |
724 | return -EINVAL; | |
725 | ||
132a55f3 | 726 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
727 | daddr = &sin6->sin6_addr; |
728 | ||
729 | if (np->sndflow) { | |
132a55f3 HX |
730 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
731 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
732 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
733 | if (flowlabel == NULL) |
734 | return -EINVAL; | |
735 | daddr = &flowlabel->dst; | |
736 | } | |
737 | } | |
738 | ||
739 | /* | |
740 | * Otherwise it will be difficult to maintain | |
741 | * sk->sk_dst_cache. | |
742 | */ | |
743 | if (sk->sk_state == TCP_ESTABLISHED && | |
744 | ipv6_addr_equal(daddr, &np->daddr)) | |
745 | daddr = &np->daddr; | |
746 | ||
747 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
748 | sin6->sin6_scope_id && | |
749 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 750 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
751 | } else { |
752 | if (sk->sk_state != TCP_ESTABLISHED) | |
753 | return -EDESTADDRREQ; | |
754 | ||
132a55f3 | 755 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 756 | daddr = &np->daddr; |
132a55f3 | 757 | fl.fl6_flowlabel = np->flow_label; |
987905de | 758 | connected = 1; |
1da177e4 LT |
759 | } |
760 | ||
132a55f3 HX |
761 | if (!fl.oif) |
762 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
763 | |
764 | if (msg->msg_controllen) { | |
765 | opt = &opt_space; | |
766 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
767 | opt->tot_len = sizeof(*opt); | |
768 | ||
91e1908f | 769 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
770 | if (err < 0) { |
771 | fl6_sock_release(flowlabel); | |
772 | return err; | |
773 | } | |
132a55f3 HX |
774 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
775 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
776 | if (flowlabel == NULL) |
777 | return -EINVAL; | |
778 | } | |
779 | if (!(opt->opt_nflen|opt->opt_flen)) | |
780 | opt = NULL; | |
987905de | 781 | connected = 0; |
1da177e4 LT |
782 | } |
783 | if (opt == NULL) | |
784 | opt = np->opt; | |
df9890c3 YH |
785 | if (flowlabel) |
786 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
787 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 788 | |
ba4e58ec | 789 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
790 | if (!ipv6_addr_any(daddr)) |
791 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
792 | else | |
793 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
794 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
795 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
796 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 797 | |
1da177e4 LT |
798 | /* merge ip6_build_xmit from ip6_output */ |
799 | if (opt && opt->srcrt) { | |
800 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
801 | ipv6_addr_copy(&final, &fl.fl6_dst); |
802 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 803 | final_p = &final; |
987905de | 804 | connected = 0; |
1da177e4 LT |
805 | } |
806 | ||
132a55f3 HX |
807 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
808 | fl.oif = np->mcast_oif; | |
987905de MK |
809 | connected = 0; |
810 | } | |
1da177e4 | 811 | |
132a55f3 | 812 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 813 | |
132a55f3 | 814 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
815 | if (err) |
816 | goto out; | |
817 | if (final_p) | |
132a55f3 | 818 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 819 | |
bb72845e | 820 | if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) { |
14e50e57 DM |
821 | if (err == -EREMOTE) |
822 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
823 | if (err < 0) | |
824 | goto out; | |
825 | } | |
1da177e4 LT |
826 | |
827 | if (hlimit < 0) { | |
132a55f3 | 828 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
829 | hlimit = np->mcast_hops; |
830 | else | |
831 | hlimit = np->hop_limit; | |
832 | if (hlimit < 0) | |
6b75d090 | 833 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
834 | } |
835 | ||
41a1f8ea YH |
836 | if (tclass < 0) { |
837 | tclass = np->tclass; | |
838 | if (tclass < 0) | |
839 | tclass = 0; | |
840 | } | |
841 | ||
1da177e4 LT |
842 | if (msg->msg_flags&MSG_CONFIRM) |
843 | goto do_confirm; | |
844 | back_from_confirm: | |
845 | ||
846 | lock_sock(sk); | |
847 | if (unlikely(up->pending)) { | |
848 | /* The socket is already corked while preparing it. */ | |
849 | /* ... which is an evident application bug. --ANK */ | |
850 | release_sock(sk); | |
851 | ||
64ce2073 | 852 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
853 | err = -EINVAL; |
854 | goto out; | |
855 | } | |
856 | ||
857 | up->pending = AF_INET6; | |
858 | ||
859 | do_append_data: | |
860 | up->len += ulen; | |
ba4e58ec GR |
861 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
862 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 863 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
864 | (struct rt6_info*)dst, |
865 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
866 | if (err) |
867 | udp_v6_flush_pending_frames(sk); | |
868 | else if (!corkreq) | |
4c0a6cb0 | 869 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
870 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
871 | up->pending = 0; | |
1da177e4 | 872 | |
a5e7c210 DM |
873 | if (dst) { |
874 | if (connected) { | |
875 | ip6_dst_store(sk, dst, | |
132a55f3 | 876 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
877 | &np->daddr : NULL, |
878 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 879 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
880 | &np->saddr : |
881 | #endif | |
882 | NULL); | |
a5e7c210 DM |
883 | } else { |
884 | dst_release(dst); | |
885 | } | |
a3c96089 | 886 | dst = NULL; |
a5e7c210 DM |
887 | } |
888 | ||
1da177e4 LT |
889 | if (err > 0) |
890 | err = np->recverr ? net_xmit_errno(err) : 0; | |
891 | release_sock(sk); | |
892 | out: | |
a3c96089 | 893 | dst_release(dst); |
1da177e4 | 894 | fl6_sock_release(flowlabel); |
cd562c98 | 895 | if (!err) |
1da177e4 | 896 | return len; |
a18135eb DM |
897 | /* |
898 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
899 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
900 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
901 | * things). We could add another new stat but at least for now that | |
902 | * seems like overkill. | |
903 | */ | |
904 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
905 | UDP6_INC_STATS_USER(sock_net(sk), |
906 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 907 | } |
1da177e4 LT |
908 | return err; |
909 | ||
910 | do_confirm: | |
911 | dst_confirm(dst); | |
912 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
913 | goto back_from_confirm; | |
914 | err = 0; | |
915 | goto out; | |
916 | } | |
917 | ||
7d06b2e0 | 918 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
919 | { |
920 | lock_sock(sk); | |
921 | udp_v6_flush_pending_frames(sk); | |
922 | release_sock(sk); | |
923 | ||
924 | inet6_destroy_sock(sk); | |
1da177e4 LT |
925 | } |
926 | ||
927 | /* | |
928 | * Socket option code for UDP | |
929 | */ | |
ba4e58ec GR |
930 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
931 | char __user *optval, int optlen) | |
3fdadf7d | 932 | { |
db8dac20 | 933 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
934 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
935 | udp_v6_push_pending_frames); | |
ba4e58ec | 936 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
937 | } |
938 | ||
939 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
940 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
941 | char __user *optval, int optlen) | |
3fdadf7d | 942 | { |
db8dac20 | 943 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
944 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
945 | udp_v6_push_pending_frames); | |
ba4e58ec | 946 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
947 | } |
948 | #endif | |
949 | ||
ba4e58ec GR |
950 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
951 | char __user *optval, int __user *optlen) | |
3fdadf7d | 952 | { |
db8dac20 | 953 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 954 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 955 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
956 | } |
957 | ||
958 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
959 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
960 | char __user *optval, int __user *optlen) | |
3fdadf7d | 961 | { |
db8dac20 | 962 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 963 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 964 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
965 | } |
966 | #endif | |
967 | ||
1da177e4 LT |
968 | static struct inet6_protocol udpv6_protocol = { |
969 | .handler = udpv6_rcv, | |
970 | .err_handler = udpv6_err, | |
971 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
972 | }; | |
973 | ||
974 | /* ------------------------------------------------------------------------ */ | |
975 | #ifdef CONFIG_PROC_FS | |
976 | ||
977 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
978 | { | |
979 | struct inet_sock *inet = inet_sk(sp); | |
980 | struct ipv6_pinfo *np = inet6_sk(sp); | |
981 | struct in6_addr *dest, *src; | |
982 | __u16 destp, srcp; | |
983 | ||
984 | dest = &np->daddr; | |
985 | src = &np->rcv_saddr; | |
986 | destp = ntohs(inet->dport); | |
987 | srcp = ntohs(inet->sport); | |
988 | seq_printf(seq, | |
989 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
cb61cb9b | 990 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
991 | bucket, |
992 | src->s6_addr32[0], src->s6_addr32[1], | |
993 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
994 | dest->s6_addr32[0], dest->s6_addr32[1], | |
995 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 996 | sp->sk_state, |
1da177e4 LT |
997 | atomic_read(&sp->sk_wmem_alloc), |
998 | atomic_read(&sp->sk_rmem_alloc), | |
999 | 0, 0L, 0, | |
1000 | sock_i_uid(sp), 0, | |
1001 | sock_i_ino(sp), | |
cb61cb9b ED |
1002 | atomic_read(&sp->sk_refcnt), sp, |
1003 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1004 | } |
1005 | ||
ba4e58ec | 1006 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1007 | { |
1008 | if (v == SEQ_START_TOKEN) | |
1009 | seq_printf(seq, | |
1010 | " sl " | |
1011 | "local_address " | |
1012 | "remote_address " | |
1013 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1014 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1015 | else |
1016 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1017 | return 0; | |
1018 | } | |
1019 | ||
1da177e4 | 1020 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1021 | .name = "udp6", |
1022 | .family = AF_INET6, | |
645ca708 | 1023 | .udp_table = &udp_table, |
4ad96d39 DL |
1024 | .seq_fops = { |
1025 | .owner = THIS_MODULE, | |
1026 | }, | |
dda61925 DL |
1027 | .seq_ops = { |
1028 | .show = udp6_seq_show, | |
1029 | }, | |
1da177e4 LT |
1030 | }; |
1031 | ||
0c96d8c5 | 1032 | int udp6_proc_init(struct net *net) |
1da177e4 | 1033 | { |
0c96d8c5 | 1034 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1035 | } |
1036 | ||
0c96d8c5 DL |
1037 | void udp6_proc_exit(struct net *net) { |
1038 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1039 | } |
1040 | #endif /* CONFIG_PROC_FS */ | |
1041 | ||
1042 | /* ------------------------------------------------------------------------ */ | |
1043 | ||
1044 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1045 | .name = "UDPv6", |
1046 | .owner = THIS_MODULE, | |
ba4e58ec | 1047 | .close = udp_lib_close, |
543d9cfe ACM |
1048 | .connect = ip6_datagram_connect, |
1049 | .disconnect = udp_disconnect, | |
1050 | .ioctl = udp_ioctl, | |
1051 | .destroy = udpv6_destroy_sock, | |
1052 | .setsockopt = udpv6_setsockopt, | |
1053 | .getsockopt = udpv6_getsockopt, | |
1054 | .sendmsg = udpv6_sendmsg, | |
1055 | .recvmsg = udpv6_recvmsg, | |
1056 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1057 | .hash = udp_lib_hash, |
1058 | .unhash = udp_lib_unhash, | |
543d9cfe | 1059 | .get_port = udp_v6_get_port, |
95766fff HA |
1060 | .memory_allocated = &udp_memory_allocated, |
1061 | .sysctl_mem = sysctl_udp_mem, | |
1062 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1063 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1064 | .obj_size = sizeof(struct udp6_sock), |
645ca708 | 1065 | .h.udp_table = &udp_table, |
3fdadf7d | 1066 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1067 | .compat_setsockopt = compat_udpv6_setsockopt, |
1068 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1069 | #endif |
1da177e4 LT |
1070 | }; |
1071 | ||
1da177e4 LT |
1072 | static struct inet_protosw udpv6_protosw = { |
1073 | .type = SOCK_DGRAM, | |
1074 | .protocol = IPPROTO_UDP, | |
1075 | .prot = &udpv6_prot, | |
1076 | .ops = &inet6_dgram_ops, | |
1077 | .capability =-1, | |
1078 | .no_check = UDP_CSUM_DEFAULT, | |
1079 | .flags = INET_PROTOSW_PERMANENT, | |
1080 | }; | |
1081 | ||
1082 | ||
7f4e4868 | 1083 | int __init udpv6_init(void) |
1da177e4 | 1084 | { |
7f4e4868 DL |
1085 | int ret; |
1086 | ||
1087 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1088 | if (ret) | |
1089 | goto out; | |
1090 | ||
1091 | ret = inet6_register_protosw(&udpv6_protosw); | |
1092 | if (ret) | |
1093 | goto out_udpv6_protocol; | |
1094 | out: | |
1095 | return ret; | |
1096 | ||
1097 | out_udpv6_protocol: | |
1098 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1099 | goto out; | |
1100 | } | |
1101 | ||
09f7709f | 1102 | void udpv6_exit(void) |
7f4e4868 DL |
1103 | { |
1104 | inet6_unregister_protosw(&udpv6_protosw); | |
1105 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1106 | } |