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 | 99 | { |
271b72c7 | 100 | struct sock *sk, *result; |
88ab1932 | 101 | struct hlist_nulls_node *node; |
1da177e4 | 102 | unsigned short hnum = ntohs(dport); |
645ca708 ED |
103 | unsigned int hash = udp_hashfn(net, hnum); |
104 | struct udp_hslot *hslot = &udptable->hash[hash]; | |
271b72c7 | 105 | int score, badness; |
645ca708 | 106 | |
271b72c7 ED |
107 | rcu_read_lock(); |
108 | begin: | |
109 | result = NULL; | |
110 | badness = -1; | |
88ab1932 | 111 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
112 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
113 | if (score > badness) { | |
114 | result = sk; | |
115 | badness = score; | |
1da177e4 LT |
116 | } |
117 | } | |
88ab1932 ED |
118 | /* |
119 | * if the nulls value we got at the end of this lookup is | |
120 | * not the expected one, we must restart lookup. | |
121 | * We probably met an item that was moved to another chain. | |
122 | */ | |
123 | if (get_nulls_value(node) != hash) | |
124 | goto begin; | |
125 | ||
271b72c7 ED |
126 | if (result) { |
127 | if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) | |
128 | result = NULL; | |
129 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
130 | daddr, dport, dif) < badness)) { | |
131 | sock_put(result); | |
132 | goto begin; | |
133 | } | |
134 | } | |
135 | rcu_read_unlock(); | |
1da177e4 LT |
136 | return result; |
137 | } | |
138 | ||
607c4aaf KK |
139 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
140 | __be16 sport, __be16 dport, | |
645ca708 | 141 | struct udp_table *udptable) |
607c4aaf | 142 | { |
23542618 | 143 | struct sock *sk; |
607c4aaf KK |
144 | struct ipv6hdr *iph = ipv6_hdr(skb); |
145 | ||
23542618 KK |
146 | if (unlikely(sk = skb_steal_sock(skb))) |
147 | return sk; | |
148 | else | |
149 | return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport, | |
150 | &iph->daddr, dport, inet6_iif(skb), | |
151 | udptable); | |
607c4aaf KK |
152 | } |
153 | ||
1da177e4 LT |
154 | /* |
155 | * This should be easy, if there is something there we | |
156 | * return it, otherwise we block. | |
157 | */ | |
158 | ||
ba4e58ec | 159 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
160 | struct msghdr *msg, size_t len, |
161 | int noblock, int flags, int *addr_len) | |
162 | { | |
163 | struct ipv6_pinfo *np = inet6_sk(sk); | |
164 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 165 | struct sk_buff *skb; |
759e5d00 | 166 | unsigned int ulen, copied; |
a59322be | 167 | int peeked; |
759e5d00 HX |
168 | int err; |
169 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 170 | int is_udp4; |
1da177e4 | 171 | |
1ab1457c YH |
172 | if (addr_len) |
173 | *addr_len=sizeof(struct sockaddr_in6); | |
174 | ||
1da177e4 LT |
175 | if (flags & MSG_ERRQUEUE) |
176 | return ipv6_recv_error(sk, msg, len); | |
177 | ||
178 | try_again: | |
a59322be HX |
179 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
180 | &peeked, &err); | |
1da177e4 LT |
181 | if (!skb) |
182 | goto out; | |
183 | ||
759e5d00 HX |
184 | ulen = skb->len - sizeof(struct udphdr); |
185 | copied = len; | |
186 | if (copied > ulen) | |
187 | copied = ulen; | |
188 | else if (copied < ulen) | |
1ab1457c | 189 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 190 | |
f26ba175 WY |
191 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
192 | ||
ba4e58ec | 193 | /* |
759e5d00 HX |
194 | * If checksum is needed at all, try to do it while copying the |
195 | * data. If the data is truncated, or if we only want a partial | |
196 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 197 | */ |
ba4e58ec | 198 | |
759e5d00 HX |
199 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
200 | if (udp_lib_checksum_complete(skb)) | |
1da177e4 | 201 | goto csum_copy_err; |
ba4e58ec GR |
202 | } |
203 | ||
60476372 | 204 | if (skb_csum_unnecessary(skb)) |
ba4e58ec GR |
205 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
206 | msg->msg_iov, copied ); | |
207 | else { | |
1da177e4 LT |
208 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
209 | if (err == -EINVAL) | |
210 | goto csum_copy_err; | |
211 | } | |
212 | if (err) | |
213 | goto out_free; | |
214 | ||
f26ba175 WY |
215 | if (!peeked) { |
216 | if (is_udp4) | |
217 | UDP_INC_STATS_USER(sock_net(sk), | |
218 | UDP_MIB_INDATAGRAMS, is_udplite); | |
219 | else | |
220 | UDP6_INC_STATS_USER(sock_net(sk), | |
221 | UDP_MIB_INDATAGRAMS, is_udplite); | |
222 | } | |
cb75994e | 223 | |
1da177e4 LT |
224 | sock_recv_timestamp(msg, sk, skb); |
225 | ||
226 | /* Copy the address. */ | |
227 | if (msg->msg_name) { | |
228 | struct sockaddr_in6 *sin6; | |
1ab1457c | 229 | |
1da177e4 LT |
230 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
231 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 232 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
233 | sin6->sin6_flowinfo = 0; |
234 | sin6->sin6_scope_id = 0; | |
235 | ||
f26ba175 | 236 | if (is_udp4) |
1da177e4 | 237 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, |
eddc9ec5 | 238 | htonl(0xffff), ip_hdr(skb)->saddr); |
1da177e4 | 239 | else { |
0660e03f ACM |
240 | ipv6_addr_copy(&sin6->sin6_addr, |
241 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
242 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
243 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
244 | } | |
245 | ||
246 | } | |
f26ba175 | 247 | if (is_udp4) { |
1da177e4 LT |
248 | if (inet->cmsg_flags) |
249 | ip_cmsg_recv(msg, skb); | |
250 | } else { | |
251 | if (np->rxopt.all) | |
252 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 253 | } |
1da177e4 LT |
254 | |
255 | err = copied; | |
256 | if (flags & MSG_TRUNC) | |
759e5d00 | 257 | err = ulen; |
1da177e4 LT |
258 | |
259 | out_free: | |
95766fff | 260 | lock_sock(sk); |
1da177e4 | 261 | skb_free_datagram(sk, skb); |
95766fff | 262 | release_sock(sk); |
1da177e4 LT |
263 | out: |
264 | return err; | |
265 | ||
266 | csum_copy_err: | |
95766fff | 267 | lock_sock(sk); |
0856f939 WY |
268 | if (!skb_kill_datagram(sk, skb, flags)) { |
269 | if (is_udp4) | |
270 | UDP_INC_STATS_USER(sock_net(sk), | |
271 | UDP_MIB_INERRORS, is_udplite); | |
272 | else | |
273 | UDP6_INC_STATS_USER(sock_net(sk), | |
274 | UDP_MIB_INERRORS, is_udplite); | |
275 | } | |
95766fff | 276 | release_sock(sk); |
1da177e4 | 277 | |
7a0ff716 | 278 | if (flags & MSG_DONTWAIT) |
1da177e4 | 279 | return -EAGAIN; |
1da177e4 LT |
280 | goto try_again; |
281 | } | |
282 | ||
ba4e58ec GR |
283 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
284 | int type, int code, int offset, __be32 info, | |
645ca708 | 285 | struct udp_table *udptable) |
1da177e4 LT |
286 | { |
287 | struct ipv6_pinfo *np; | |
288 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
289 | struct in6_addr *saddr = &hdr->saddr; |
290 | struct in6_addr *daddr = &hdr->daddr; | |
291 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
292 | struct sock *sk; | |
293 | int err; | |
294 | ||
c346dca1 | 295 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 296 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
297 | if (sk == NULL) |
298 | return; | |
299 | ||
300 | np = inet6_sk(sk); | |
301 | ||
302 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
303 | goto out; | |
304 | ||
305 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
306 | goto out; | |
307 | ||
308 | if (np->recverr) | |
309 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
310 | ||
311 | sk->sk_err = err; | |
312 | sk->sk_error_report(sk); | |
313 | out: | |
314 | sock_put(sk); | |
315 | } | |
316 | ||
ba4e58ec GR |
317 | static __inline__ void udpv6_err(struct sk_buff *skb, |
318 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 319 | int code, int offset, __be32 info ) |
ba4e58ec | 320 | { |
645ca708 | 321 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
322 | } |
323 | ||
324 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 325 | { |
ba4e58ec | 326 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 327 | int rc; |
b2bf1e26 | 328 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 329 | |
ba4e58ec GR |
330 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
331 | goto drop; | |
1da177e4 | 332 | |
ba4e58ec GR |
333 | /* |
334 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
335 | */ | |
b2bf1e26 | 336 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
337 | |
338 | if (up->pcrlen == 0) { /* full coverage was set */ | |
339 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
340 | " %d while full coverage %d requested\n", | |
341 | UDP_SKB_CB(skb)->cscov, skb->len); | |
342 | goto drop; | |
343 | } | |
344 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
345 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
346 | "too small, need min %d\n", | |
347 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
348 | goto drop; | |
349 | } | |
1da177e4 LT |
350 | } |
351 | ||
1ab6eb62 HX |
352 | if (sk->sk_filter) { |
353 | if (udp_lib_checksum_complete(skb)) | |
354 | goto drop; | |
355 | } | |
ba4e58ec | 356 | |
a18135eb DM |
357 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
358 | /* Note that an ENOMEM error is charged twice */ | |
cb61cb9b | 359 | if (rc == -ENOMEM) { |
ef28d1a2 PE |
360 | UDP6_INC_STATS_BH(sock_net(sk), |
361 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
cb61cb9b ED |
362 | atomic_inc(&sk->sk_drops); |
363 | } | |
ba4e58ec | 364 | goto drop; |
1da177e4 | 365 | } |
cb75994e | 366 | |
1da177e4 | 367 | return 0; |
ba4e58ec | 368 | drop: |
ef28d1a2 | 369 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
370 | kfree_skb(skb); |
371 | return -1; | |
1da177e4 LT |
372 | } |
373 | ||
920a4611 | 374 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
375 | __be16 loc_port, struct in6_addr *loc_addr, |
376 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
377 | int dif) |
378 | { | |
88ab1932 | 379 | struct hlist_nulls_node *node; |
1da177e4 LT |
380 | struct sock *s = sk; |
381 | unsigned short num = ntohs(loc_port); | |
382 | ||
88ab1932 | 383 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
384 | struct inet_sock *inet = inet_sk(s); |
385 | ||
920a4611 | 386 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
387 | continue; |
388 | ||
95f30b33 | 389 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
390 | struct ipv6_pinfo *np = inet6_sk(s); |
391 | if (inet->dport) { | |
392 | if (inet->dport != rmt_port) | |
393 | continue; | |
394 | } | |
395 | if (!ipv6_addr_any(&np->daddr) && | |
396 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
397 | continue; | |
398 | ||
399 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
400 | continue; | |
401 | ||
402 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
403 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
404 | continue; | |
1da177e4 | 405 | } |
add459aa | 406 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
407 | continue; |
408 | return s; | |
409 | } | |
410 | } | |
411 | return NULL; | |
412 | } | |
413 | ||
414 | /* | |
415 | * Note: called only from the BH handler context, | |
416 | * so we don't need to lock the hashes. | |
417 | */ | |
e3163493 PE |
418 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
419 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 420 | struct udp_table *udptable) |
1da177e4 LT |
421 | { |
422 | struct sock *sk, *sk2; | |
4bedb452 | 423 | const struct udphdr *uh = udp_hdr(skb); |
645ca708 | 424 | struct udp_hslot *hslot = &udptable->hash[udp_hashfn(net, ntohs(uh->dest))]; |
1da177e4 LT |
425 | int dif; |
426 | ||
645ca708 | 427 | spin_lock(&hslot->lock); |
88ab1932 | 428 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 429 | dif = inet6_iif(skb); |
920a4611 | 430 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
1da177e4 LT |
431 | if (!sk) { |
432 | kfree_skb(skb); | |
433 | goto out; | |
434 | } | |
435 | ||
436 | sk2 = sk; | |
88ab1932 | 437 | while ((sk2 = udp_v6_mcast_next(net, sk_nulls_next(sk2), uh->dest, daddr, |
1da177e4 LT |
438 | uh->source, saddr, dif))) { |
439 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
95766fff | 440 | if (buff) { |
d97106ea | 441 | bh_lock_sock(sk2); |
95766fff HA |
442 | if (!sock_owned_by_user(sk2)) |
443 | udpv6_queue_rcv_skb(sk2, buff); | |
444 | else | |
445 | sk_add_backlog(sk2, buff); | |
446 | bh_unlock_sock(sk2); | |
447 | } | |
1da177e4 | 448 | } |
d97106ea | 449 | bh_lock_sock(sk); |
95766fff HA |
450 | if (!sock_owned_by_user(sk)) |
451 | udpv6_queue_rcv_skb(sk, skb); | |
452 | else | |
453 | sk_add_backlog(sk, skb); | |
454 | bh_unlock_sock(sk); | |
1da177e4 | 455 | out: |
645ca708 | 456 | spin_unlock(&hslot->lock); |
ba4e58ec | 457 | return 0; |
1da177e4 LT |
458 | } |
459 | ||
759e5d00 HX |
460 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
461 | int proto) | |
ba4e58ec | 462 | { |
759e5d00 HX |
463 | int err; |
464 | ||
465 | UDP_SKB_CB(skb)->partial_cov = 0; | |
466 | UDP_SKB_CB(skb)->cscov = skb->len; | |
467 | ||
db8dac20 | 468 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
469 | err = udplite_checksum_init(skb, uh); |
470 | if (err) | |
471 | return err; | |
472 | } | |
473 | ||
ba4e58ec GR |
474 | if (uh->check == 0) { |
475 | /* RFC 2460 section 8.1 says that we SHOULD log | |
476 | this error. Well, it is reasonable. | |
477 | */ | |
478 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
479 | return 1; | |
480 | } | |
481 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 482 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 483 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
484 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
485 | ||
60476372 | 486 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
487 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
488 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 489 | skb->len, proto, 0)); |
ba4e58ec | 490 | |
759e5d00 | 491 | return 0; |
ba4e58ec GR |
492 | } |
493 | ||
645ca708 | 494 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 495 | int proto) |
1da177e4 | 496 | { |
1da177e4 | 497 | struct sock *sk; |
1ab1457c | 498 | struct udphdr *uh; |
1da177e4 LT |
499 | struct net_device *dev = skb->dev; |
500 | struct in6_addr *saddr, *daddr; | |
501 | u32 ulen = 0; | |
ef28d1a2 | 502 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
503 | |
504 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
505 | goto short_packet; | |
506 | ||
0660e03f ACM |
507 | saddr = &ipv6_hdr(skb)->saddr; |
508 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 509 | uh = udp_hdr(skb); |
1da177e4 LT |
510 | |
511 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
512 | if (ulen > skb->len) |
513 | goto short_packet; | |
1da177e4 | 514 | |
759e5d00 HX |
515 | if (proto == IPPROTO_UDP) { |
516 | /* UDP validates ulen. */ | |
1da177e4 | 517 | |
ba4e58ec GR |
518 | /* Check for jumbo payload */ |
519 | if (ulen == 0) | |
520 | ulen = skb->len; | |
1da177e4 | 521 | |
ba4e58ec GR |
522 | if (ulen < sizeof(*uh)) |
523 | goto short_packet; | |
1da177e4 | 524 | |
ba4e58ec GR |
525 | if (ulen < skb->len) { |
526 | if (pskb_trim_rcsum(skb, ulen)) | |
527 | goto short_packet; | |
0660e03f ACM |
528 | saddr = &ipv6_hdr(skb)->saddr; |
529 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 530 | uh = udp_hdr(skb); |
ba4e58ec | 531 | } |
ba4e58ec | 532 | } |
1da177e4 | 533 | |
759e5d00 HX |
534 | if (udp6_csum_init(skb, uh, proto)) |
535 | goto discard; | |
536 | ||
1ab1457c YH |
537 | /* |
538 | * Multicast receive code | |
1da177e4 | 539 | */ |
ba4e58ec | 540 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
541 | return __udp6_lib_mcast_deliver(net, skb, |
542 | saddr, daddr, udptable); | |
1da177e4 LT |
543 | |
544 | /* Unicast */ | |
545 | ||
1ab1457c | 546 | /* |
1da177e4 LT |
547 | * check socket cache ... must talk to Alan about his plans |
548 | * for sock caches... i'll skip this for now. | |
549 | */ | |
607c4aaf | 550 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
551 | |
552 | if (sk == NULL) { | |
553 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
554 | goto discard; | |
555 | ||
ba4e58ec | 556 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 557 | goto discard; |
ef28d1a2 PE |
558 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
559 | proto == IPPROTO_UDPLITE); | |
1da177e4 LT |
560 | |
561 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
562 | ||
563 | kfree_skb(skb); | |
add459aa | 564 | return 0; |
1da177e4 | 565 | } |
1ab1457c | 566 | |
1da177e4 | 567 | /* deliver */ |
1ab1457c | 568 | |
d97106ea | 569 | bh_lock_sock(sk); |
95766fff HA |
570 | if (!sock_owned_by_user(sk)) |
571 | udpv6_queue_rcv_skb(sk, skb); | |
572 | else | |
573 | sk_add_backlog(sk, skb); | |
574 | bh_unlock_sock(sk); | |
1da177e4 | 575 | sock_put(sk); |
add459aa | 576 | return 0; |
1da177e4 | 577 | |
1ab1457c | 578 | short_packet: |
ba4e58ec | 579 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 580 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 581 | ulen, skb->len); |
1da177e4 LT |
582 | |
583 | discard: | |
ef28d1a2 | 584 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 585 | kfree_skb(skb); |
add459aa | 586 | return 0; |
1da177e4 | 587 | } |
ba4e58ec | 588 | |
e5bbef20 | 589 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 590 | { |
645ca708 | 591 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
592 | } |
593 | ||
1da177e4 LT |
594 | /* |
595 | * Throw away all pending data and cancel the corking. Socket is locked. | |
596 | */ | |
597 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
598 | { | |
599 | struct udp_sock *up = udp_sk(sk); | |
600 | ||
36d926b9 DL |
601 | if (up->pending == AF_INET) |
602 | udp_flush_pending_frames(sk); | |
603 | else if (up->pending) { | |
1da177e4 LT |
604 | up->len = 0; |
605 | up->pending = 0; | |
606 | ip6_flush_pending_frames(sk); | |
1ab1457c | 607 | } |
1da177e4 LT |
608 | } |
609 | ||
610 | /* | |
611 | * Sending | |
612 | */ | |
613 | ||
4c0a6cb0 | 614 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
615 | { |
616 | struct sk_buff *skb; | |
617 | struct udphdr *uh; | |
4c0a6cb0 | 618 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
619 | struct inet_sock *inet = inet_sk(sk); |
620 | struct flowi *fl = &inet->cork.fl; | |
621 | int err = 0; | |
b2bf1e26 | 622 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 623 | __wsum csum = 0; |
1da177e4 LT |
624 | |
625 | /* Grab the skbuff where UDP header space exists. */ | |
626 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
627 | goto out; | |
628 | ||
629 | /* | |
630 | * Create a UDP header | |
631 | */ | |
4bedb452 | 632 | uh = udp_hdr(skb); |
1da177e4 LT |
633 | uh->source = fl->fl_ip_sport; |
634 | uh->dest = fl->fl_ip_dport; | |
635 | uh->len = htons(up->len); | |
636 | uh->check = 0; | |
637 | ||
b2bf1e26 | 638 | if (is_udplite) |
ba4e58ec GR |
639 | csum = udplite_csum_outgoing(sk, skb); |
640 | else | |
641 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 642 | |
ba4e58ec GR |
643 | /* add protocol-dependent pseudo-header */ |
644 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
645 | up->len, fl->proto, csum ); | |
1da177e4 | 646 | if (uh->check == 0) |
f6ab0288 | 647 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 648 | |
1da177e4 LT |
649 | err = ip6_push_pending_frames(sk); |
650 | out: | |
651 | up->len = 0; | |
652 | up->pending = 0; | |
cd562c98 | 653 | if (!err) |
235b9f7a PE |
654 | UDP6_INC_STATS_USER(sock_net(sk), |
655 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
656 | return err; |
657 | } | |
658 | ||
ba4e58ec | 659 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
660 | struct msghdr *msg, size_t len) |
661 | { | |
662 | struct ipv6_txoptions opt_space; | |
663 | struct udp_sock *up = udp_sk(sk); | |
664 | struct inet_sock *inet = inet_sk(sk); | |
665 | struct ipv6_pinfo *np = inet6_sk(sk); | |
666 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
667 | struct in6_addr *daddr, *final_p = NULL, final; | |
668 | struct ipv6_txoptions *opt = NULL; | |
669 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 670 | struct flowi fl; |
1da177e4 LT |
671 | struct dst_entry *dst; |
672 | int addr_len = msg->msg_namelen; | |
673 | int ulen = len; | |
674 | int hlimit = -1; | |
41a1f8ea | 675 | int tclass = -1; |
1da177e4 LT |
676 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
677 | int err; | |
987905de | 678 | int connected = 0; |
b2bf1e26 | 679 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 680 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
681 | |
682 | /* destination address check */ | |
683 | if (sin6) { | |
684 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
685 | return -EINVAL; | |
686 | ||
687 | switch (sin6->sin6_family) { | |
688 | case AF_INET6: | |
689 | if (addr_len < SIN6_LEN_RFC2133) | |
690 | return -EINVAL; | |
691 | daddr = &sin6->sin6_addr; | |
692 | break; | |
693 | case AF_INET: | |
694 | goto do_udp_sendmsg; | |
695 | case AF_UNSPEC: | |
696 | msg->msg_name = sin6 = NULL; | |
697 | msg->msg_namelen = addr_len = 0; | |
698 | daddr = NULL; | |
699 | break; | |
700 | default: | |
701 | return -EINVAL; | |
702 | } | |
703 | } else if (!up->pending) { | |
704 | if (sk->sk_state != TCP_ESTABLISHED) | |
705 | return -EDESTADDRREQ; | |
706 | daddr = &np->daddr; | |
1ab1457c | 707 | } else |
1da177e4 LT |
708 | daddr = NULL; |
709 | ||
710 | if (daddr) { | |
e773e4fa | 711 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
712 | struct sockaddr_in sin; |
713 | sin.sin_family = AF_INET; | |
714 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
715 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
716 | msg->msg_name = &sin; | |
717 | msg->msg_namelen = sizeof(sin); | |
718 | do_udp_sendmsg: | |
719 | if (__ipv6_only_sock(sk)) | |
720 | return -ENETUNREACH; | |
721 | return udp_sendmsg(iocb, sk, msg, len); | |
722 | } | |
723 | } | |
724 | ||
725 | if (up->pending == AF_INET) | |
726 | return udp_sendmsg(iocb, sk, msg, len); | |
727 | ||
728 | /* Rough check on arithmetic overflow, | |
b59e139b | 729 | better check is made in ip6_append_data(). |
1da177e4 LT |
730 | */ |
731 | if (len > INT_MAX - sizeof(struct udphdr)) | |
732 | return -EMSGSIZE; | |
1ab1457c | 733 | |
1da177e4 LT |
734 | if (up->pending) { |
735 | /* | |
736 | * There are pending frames. | |
737 | * The socket lock must be held while it's corked. | |
738 | */ | |
739 | lock_sock(sk); | |
740 | if (likely(up->pending)) { | |
741 | if (unlikely(up->pending != AF_INET6)) { | |
742 | release_sock(sk); | |
743 | return -EAFNOSUPPORT; | |
744 | } | |
745 | dst = NULL; | |
746 | goto do_append_data; | |
747 | } | |
748 | release_sock(sk); | |
749 | } | |
750 | ulen += sizeof(struct udphdr); | |
751 | ||
132a55f3 | 752 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
753 | |
754 | if (sin6) { | |
755 | if (sin6->sin6_port == 0) | |
756 | return -EINVAL; | |
757 | ||
132a55f3 | 758 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
759 | daddr = &sin6->sin6_addr; |
760 | ||
761 | if (np->sndflow) { | |
132a55f3 HX |
762 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
763 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
764 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
765 | if (flowlabel == NULL) |
766 | return -EINVAL; | |
767 | daddr = &flowlabel->dst; | |
768 | } | |
769 | } | |
770 | ||
771 | /* | |
772 | * Otherwise it will be difficult to maintain | |
773 | * sk->sk_dst_cache. | |
774 | */ | |
775 | if (sk->sk_state == TCP_ESTABLISHED && | |
776 | ipv6_addr_equal(daddr, &np->daddr)) | |
777 | daddr = &np->daddr; | |
778 | ||
779 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
780 | sin6->sin6_scope_id && | |
781 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 782 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
783 | } else { |
784 | if (sk->sk_state != TCP_ESTABLISHED) | |
785 | return -EDESTADDRREQ; | |
786 | ||
132a55f3 | 787 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 788 | daddr = &np->daddr; |
132a55f3 | 789 | fl.fl6_flowlabel = np->flow_label; |
987905de | 790 | connected = 1; |
1da177e4 LT |
791 | } |
792 | ||
132a55f3 HX |
793 | if (!fl.oif) |
794 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 | 795 | |
9f690db7 YH |
796 | if (!fl.oif) |
797 | fl.oif = np->sticky_pktinfo.ipi6_ifindex; | |
798 | ||
1da177e4 LT |
799 | if (msg->msg_controllen) { |
800 | opt = &opt_space; | |
801 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
802 | opt->tot_len = sizeof(*opt); | |
803 | ||
91e1908f | 804 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
805 | if (err < 0) { |
806 | fl6_sock_release(flowlabel); | |
807 | return err; | |
808 | } | |
132a55f3 HX |
809 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
810 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
811 | if (flowlabel == NULL) |
812 | return -EINVAL; | |
813 | } | |
814 | if (!(opt->opt_nflen|opt->opt_flen)) | |
815 | opt = NULL; | |
987905de | 816 | connected = 0; |
1da177e4 LT |
817 | } |
818 | if (opt == NULL) | |
819 | opt = np->opt; | |
df9890c3 YH |
820 | if (flowlabel) |
821 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
822 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 823 | |
ba4e58ec | 824 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
825 | if (!ipv6_addr_any(daddr)) |
826 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
827 | else | |
828 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
829 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
830 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
831 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 832 | |
1da177e4 LT |
833 | /* merge ip6_build_xmit from ip6_output */ |
834 | if (opt && opt->srcrt) { | |
835 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
836 | ipv6_addr_copy(&final, &fl.fl6_dst); |
837 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 838 | final_p = &final; |
987905de | 839 | connected = 0; |
1da177e4 LT |
840 | } |
841 | ||
132a55f3 HX |
842 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
843 | fl.oif = np->mcast_oif; | |
987905de MK |
844 | connected = 0; |
845 | } | |
1da177e4 | 846 | |
132a55f3 | 847 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 848 | |
132a55f3 | 849 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
850 | if (err) |
851 | goto out; | |
852 | if (final_p) | |
132a55f3 | 853 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 854 | |
52479b62 AD |
855 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
856 | if (err < 0) { | |
14e50e57 DM |
857 | if (err == -EREMOTE) |
858 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
859 | if (err < 0) | |
860 | goto out; | |
861 | } | |
1da177e4 LT |
862 | |
863 | if (hlimit < 0) { | |
132a55f3 | 864 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
865 | hlimit = np->mcast_hops; |
866 | else | |
867 | hlimit = np->hop_limit; | |
868 | if (hlimit < 0) | |
6b75d090 | 869 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
870 | } |
871 | ||
41a1f8ea YH |
872 | if (tclass < 0) { |
873 | tclass = np->tclass; | |
874 | if (tclass < 0) | |
875 | tclass = 0; | |
876 | } | |
877 | ||
1da177e4 LT |
878 | if (msg->msg_flags&MSG_CONFIRM) |
879 | goto do_confirm; | |
880 | back_from_confirm: | |
881 | ||
882 | lock_sock(sk); | |
883 | if (unlikely(up->pending)) { | |
884 | /* The socket is already corked while preparing it. */ | |
885 | /* ... which is an evident application bug. --ANK */ | |
886 | release_sock(sk); | |
887 | ||
64ce2073 | 888 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
889 | err = -EINVAL; |
890 | goto out; | |
891 | } | |
892 | ||
893 | up->pending = AF_INET6; | |
894 | ||
895 | do_append_data: | |
896 | up->len += ulen; | |
ba4e58ec GR |
897 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
898 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 899 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
900 | (struct rt6_info*)dst, |
901 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
902 | if (err) |
903 | udp_v6_flush_pending_frames(sk); | |
904 | else if (!corkreq) | |
4c0a6cb0 | 905 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
906 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
907 | up->pending = 0; | |
1da177e4 | 908 | |
a5e7c210 DM |
909 | if (dst) { |
910 | if (connected) { | |
911 | ip6_dst_store(sk, dst, | |
132a55f3 | 912 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
913 | &np->daddr : NULL, |
914 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 915 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
916 | &np->saddr : |
917 | #endif | |
918 | NULL); | |
a5e7c210 DM |
919 | } else { |
920 | dst_release(dst); | |
921 | } | |
a3c96089 | 922 | dst = NULL; |
a5e7c210 DM |
923 | } |
924 | ||
1da177e4 LT |
925 | if (err > 0) |
926 | err = np->recverr ? net_xmit_errno(err) : 0; | |
927 | release_sock(sk); | |
928 | out: | |
a3c96089 | 929 | dst_release(dst); |
1da177e4 | 930 | fl6_sock_release(flowlabel); |
cd562c98 | 931 | if (!err) |
1da177e4 | 932 | return len; |
a18135eb DM |
933 | /* |
934 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
935 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
936 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
937 | * things). We could add another new stat but at least for now that | |
938 | * seems like overkill. | |
939 | */ | |
940 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
941 | UDP6_INC_STATS_USER(sock_net(sk), |
942 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 943 | } |
1da177e4 LT |
944 | return err; |
945 | ||
946 | do_confirm: | |
947 | dst_confirm(dst); | |
948 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
949 | goto back_from_confirm; | |
950 | err = 0; | |
951 | goto out; | |
952 | } | |
953 | ||
7d06b2e0 | 954 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
955 | { |
956 | lock_sock(sk); | |
957 | udp_v6_flush_pending_frames(sk); | |
958 | release_sock(sk); | |
959 | ||
960 | inet6_destroy_sock(sk); | |
1da177e4 LT |
961 | } |
962 | ||
963 | /* | |
964 | * Socket option code for UDP | |
965 | */ | |
ba4e58ec GR |
966 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
967 | char __user *optval, int optlen) | |
3fdadf7d | 968 | { |
db8dac20 | 969 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
970 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
971 | udp_v6_push_pending_frames); | |
ba4e58ec | 972 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
973 | } |
974 | ||
975 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
976 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
977 | char __user *optval, int optlen) | |
3fdadf7d | 978 | { |
db8dac20 | 979 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
980 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
981 | udp_v6_push_pending_frames); | |
ba4e58ec | 982 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
983 | } |
984 | #endif | |
985 | ||
ba4e58ec GR |
986 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
987 | char __user *optval, int __user *optlen) | |
3fdadf7d | 988 | { |
db8dac20 | 989 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 990 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 991 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
992 | } |
993 | ||
994 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
995 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
996 | char __user *optval, int __user *optlen) | |
3fdadf7d | 997 | { |
db8dac20 | 998 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 999 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1000 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1001 | } |
1002 | #endif | |
1003 | ||
1da177e4 LT |
1004 | static struct inet6_protocol udpv6_protocol = { |
1005 | .handler = udpv6_rcv, | |
1006 | .err_handler = udpv6_err, | |
1007 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1008 | }; | |
1009 | ||
1010 | /* ------------------------------------------------------------------------ */ | |
1011 | #ifdef CONFIG_PROC_FS | |
1012 | ||
1013 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1014 | { | |
1015 | struct inet_sock *inet = inet_sk(sp); | |
1016 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1017 | struct in6_addr *dest, *src; | |
1018 | __u16 destp, srcp; | |
1019 | ||
1020 | dest = &np->daddr; | |
1021 | src = &np->rcv_saddr; | |
1022 | destp = ntohs(inet->dport); | |
1023 | srcp = ntohs(inet->sport); | |
1024 | seq_printf(seq, | |
1025 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
cb61cb9b | 1026 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1027 | bucket, |
1028 | src->s6_addr32[0], src->s6_addr32[1], | |
1029 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1030 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1031 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1032 | sp->sk_state, |
1da177e4 LT |
1033 | atomic_read(&sp->sk_wmem_alloc), |
1034 | atomic_read(&sp->sk_rmem_alloc), | |
1035 | 0, 0L, 0, | |
1036 | sock_i_uid(sp), 0, | |
1037 | sock_i_ino(sp), | |
cb61cb9b ED |
1038 | atomic_read(&sp->sk_refcnt), sp, |
1039 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1040 | } |
1041 | ||
ba4e58ec | 1042 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1043 | { |
1044 | if (v == SEQ_START_TOKEN) | |
1045 | seq_printf(seq, | |
1046 | " sl " | |
1047 | "local_address " | |
1048 | "remote_address " | |
1049 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1050 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1051 | else |
1052 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1da177e4 | 1056 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1057 | .name = "udp6", |
1058 | .family = AF_INET6, | |
645ca708 | 1059 | .udp_table = &udp_table, |
4ad96d39 DL |
1060 | .seq_fops = { |
1061 | .owner = THIS_MODULE, | |
1062 | }, | |
dda61925 DL |
1063 | .seq_ops = { |
1064 | .show = udp6_seq_show, | |
1065 | }, | |
1da177e4 LT |
1066 | }; |
1067 | ||
0c96d8c5 | 1068 | int udp6_proc_init(struct net *net) |
1da177e4 | 1069 | { |
0c96d8c5 | 1070 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1071 | } |
1072 | ||
0c96d8c5 DL |
1073 | void udp6_proc_exit(struct net *net) { |
1074 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1075 | } |
1076 | #endif /* CONFIG_PROC_FS */ | |
1077 | ||
1078 | /* ------------------------------------------------------------------------ */ | |
1079 | ||
1080 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1081 | .name = "UDPv6", |
1082 | .owner = THIS_MODULE, | |
ba4e58ec | 1083 | .close = udp_lib_close, |
543d9cfe ACM |
1084 | .connect = ip6_datagram_connect, |
1085 | .disconnect = udp_disconnect, | |
1086 | .ioctl = udp_ioctl, | |
1087 | .destroy = udpv6_destroy_sock, | |
1088 | .setsockopt = udpv6_setsockopt, | |
1089 | .getsockopt = udpv6_getsockopt, | |
1090 | .sendmsg = udpv6_sendmsg, | |
1091 | .recvmsg = udpv6_recvmsg, | |
1092 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1093 | .hash = udp_lib_hash, |
1094 | .unhash = udp_lib_unhash, | |
543d9cfe | 1095 | .get_port = udp_v6_get_port, |
95766fff HA |
1096 | .memory_allocated = &udp_memory_allocated, |
1097 | .sysctl_mem = sysctl_udp_mem, | |
1098 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1099 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1100 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1101 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1102 | .h.udp_table = &udp_table, |
3fdadf7d | 1103 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1104 | .compat_setsockopt = compat_udpv6_setsockopt, |
1105 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1106 | #endif |
1da177e4 LT |
1107 | }; |
1108 | ||
1da177e4 LT |
1109 | static struct inet_protosw udpv6_protosw = { |
1110 | .type = SOCK_DGRAM, | |
1111 | .protocol = IPPROTO_UDP, | |
1112 | .prot = &udpv6_prot, | |
1113 | .ops = &inet6_dgram_ops, | |
1114 | .capability =-1, | |
1115 | .no_check = UDP_CSUM_DEFAULT, | |
1116 | .flags = INET_PROTOSW_PERMANENT, | |
1117 | }; | |
1118 | ||
1119 | ||
7f4e4868 | 1120 | int __init udpv6_init(void) |
1da177e4 | 1121 | { |
7f4e4868 DL |
1122 | int ret; |
1123 | ||
1124 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1125 | if (ret) | |
1126 | goto out; | |
1127 | ||
1128 | ret = inet6_register_protosw(&udpv6_protosw); | |
1129 | if (ret) | |
1130 | goto out_udpv6_protocol; | |
1131 | out: | |
1132 | return ret; | |
1133 | ||
1134 | out_udpv6_protocol: | |
1135 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1136 | goto out; | |
1137 | } | |
1138 | ||
09f7709f | 1139 | void udpv6_exit(void) |
7f4e4868 DL |
1140 | { |
1141 | inet6_unregister_protosw(&udpv6_protosw); | |
1142 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1143 | } |