]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * UDP over IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Based on linux/ipv4/udp.c | |
9 | * | |
10 | * $Id: udp.c,v 1.65 2002/02/01 22:01:04 davem Exp $ | |
11 | * | |
12 | * Fixes: | |
13 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
14 | * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which | |
15 | * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind | |
16 | * a single port at the same time. | |
17 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data | |
18 | * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. | |
19 | * | |
20 | * This program is free software; you can redistribute it and/or | |
21 | * modify it under the terms of the GNU General Public License | |
22 | * as published by the Free Software Foundation; either version | |
23 | * 2 of the License, or (at your option) any later version. | |
24 | */ | |
25 | ||
1da177e4 LT |
26 | #include <linux/errno.h> |
27 | #include <linux/types.h> | |
28 | #include <linux/socket.h> | |
29 | #include <linux/sockios.h> | |
1da177e4 LT |
30 | #include <linux/net.h> |
31 | #include <linux/in6.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/if_arp.h> | |
34 | #include <linux/ipv6.h> | |
35 | #include <linux/icmpv6.h> | |
36 | #include <linux/init.h> | |
3305b80c | 37 | #include <linux/skbuff.h> |
1da177e4 LT |
38 | #include <asm/uaccess.h> |
39 | ||
1da177e4 LT |
40 | #include <net/ndisc.h> |
41 | #include <net/protocol.h> | |
42 | #include <net/transp_v6.h> | |
43 | #include <net/ip6_route.h> | |
1da177e4 | 44 | #include <net/raw.h> |
c752f073 | 45 | #include <net/tcp_states.h> |
1da177e4 LT |
46 | #include <net/ip6_checksum.h> |
47 | #include <net/xfrm.h> | |
48 | ||
49 | #include <linux/proc_fs.h> | |
50 | #include <linux/seq_file.h> | |
ba4e58ec | 51 | #include "udp_impl.h" |
1da177e4 | 52 | |
ba89966c | 53 | DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly; |
1da177e4 | 54 | |
25030a7f | 55 | static inline int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 56 | { |
25030a7f | 57 | return udp_get_port(sk, snum, ipv6_rcv_saddr_equal); |
1da177e4 LT |
58 | } |
59 | ||
ba4e58ec GR |
60 | static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport, |
61 | struct in6_addr *daddr, __be16 dport, | |
62 | int dif, struct hlist_head udptable[]) | |
1da177e4 LT |
63 | { |
64 | struct sock *sk, *result = NULL; | |
65 | struct hlist_node *node; | |
66 | unsigned short hnum = ntohs(dport); | |
67 | int badness = -1; | |
68 | ||
1ab1457c | 69 | read_lock(&udp_hash_lock); |
ba4e58ec | 70 | sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) { |
1da177e4 LT |
71 | struct inet_sock *inet = inet_sk(sk); |
72 | ||
95f30b33 | 73 | if (sk->sk_hash == hnum && sk->sk_family == PF_INET6) { |
1da177e4 LT |
74 | struct ipv6_pinfo *np = inet6_sk(sk); |
75 | int score = 0; | |
76 | if (inet->dport) { | |
77 | if (inet->dport != sport) | |
78 | continue; | |
79 | score++; | |
80 | } | |
81 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
82 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
83 | continue; | |
84 | score++; | |
85 | } | |
86 | if (!ipv6_addr_any(&np->daddr)) { | |
87 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
88 | continue; | |
89 | score++; | |
90 | } | |
91 | if (sk->sk_bound_dev_if) { | |
92 | if (sk->sk_bound_dev_if != dif) | |
93 | continue; | |
94 | score++; | |
95 | } | |
96 | if(score == 4) { | |
97 | result = sk; | |
98 | break; | |
99 | } else if(score > badness) { | |
100 | result = sk; | |
101 | badness = score; | |
102 | } | |
103 | } | |
104 | } | |
105 | if (result) | |
106 | sock_hold(result); | |
1ab1457c | 107 | read_unlock(&udp_hash_lock); |
1da177e4 LT |
108 | return result; |
109 | } | |
110 | ||
1da177e4 LT |
111 | /* |
112 | * This should be easy, if there is something there we | |
113 | * return it, otherwise we block. | |
114 | */ | |
115 | ||
ba4e58ec | 116 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
117 | struct msghdr *msg, size_t len, |
118 | int noblock, int flags, int *addr_len) | |
119 | { | |
120 | struct ipv6_pinfo *np = inet6_sk(sk); | |
121 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 122 | struct sk_buff *skb; |
1da177e4 | 123 | size_t copied; |
ba4e58ec | 124 | int err, copy_only, is_udplite = IS_UDPLITE(sk); |
1da177e4 | 125 | |
1ab1457c YH |
126 | if (addr_len) |
127 | *addr_len=sizeof(struct sockaddr_in6); | |
128 | ||
1da177e4 LT |
129 | if (flags & MSG_ERRQUEUE) |
130 | return ipv6_recv_error(sk, msg, len); | |
131 | ||
132 | try_again: | |
133 | skb = skb_recv_datagram(sk, flags, noblock, &err); | |
134 | if (!skb) | |
135 | goto out; | |
136 | ||
1ab1457c YH |
137 | copied = skb->len - sizeof(struct udphdr); |
138 | if (copied > len) { | |
139 | copied = len; | |
140 | msg->msg_flags |= MSG_TRUNC; | |
141 | } | |
1da177e4 | 142 | |
ba4e58ec GR |
143 | /* |
144 | * Decide whether to checksum and/or copy data. | |
145 | */ | |
146 | copy_only = (skb->ip_summed==CHECKSUM_UNNECESSARY); | |
147 | ||
148 | if (is_udplite || (!copy_only && msg->msg_flags&MSG_TRUNC)) { | |
149 | if (__udp_lib_checksum_complete(skb)) | |
1da177e4 | 150 | goto csum_copy_err; |
ba4e58ec GR |
151 | copy_only = 1; |
152 | } | |
153 | ||
154 | if (copy_only) | |
155 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), | |
156 | msg->msg_iov, copied ); | |
157 | else { | |
1da177e4 LT |
158 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
159 | if (err == -EINVAL) | |
160 | goto csum_copy_err; | |
161 | } | |
162 | if (err) | |
163 | goto out_free; | |
164 | ||
165 | sock_recv_timestamp(msg, sk, skb); | |
166 | ||
167 | /* Copy the address. */ | |
168 | if (msg->msg_name) { | |
169 | struct sockaddr_in6 *sin6; | |
1ab1457c | 170 | |
1da177e4 LT |
171 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
172 | sin6->sin6_family = AF_INET6; | |
173 | sin6->sin6_port = skb->h.uh->source; | |
174 | sin6->sin6_flowinfo = 0; | |
175 | sin6->sin6_scope_id = 0; | |
176 | ||
177 | if (skb->protocol == htons(ETH_P_IP)) | |
178 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, | |
179 | htonl(0xffff), skb->nh.iph->saddr); | |
180 | else { | |
181 | ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); | |
182 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
183 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
184 | } | |
185 | ||
186 | } | |
187 | if (skb->protocol == htons(ETH_P_IP)) { | |
188 | if (inet->cmsg_flags) | |
189 | ip_cmsg_recv(msg, skb); | |
190 | } else { | |
191 | if (np->rxopt.all) | |
192 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 193 | } |
1da177e4 LT |
194 | |
195 | err = copied; | |
196 | if (flags & MSG_TRUNC) | |
197 | err = skb->len - sizeof(struct udphdr); | |
198 | ||
199 | out_free: | |
200 | skb_free_datagram(sk, skb); | |
201 | out: | |
202 | return err; | |
203 | ||
204 | csum_copy_err: | |
3305b80c | 205 | skb_kill_datagram(sk, skb, flags); |
1da177e4 LT |
206 | |
207 | if (flags & MSG_DONTWAIT) { | |
ba4e58ec | 208 | UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite); |
1da177e4 LT |
209 | return -EAGAIN; |
210 | } | |
211 | goto try_again; | |
212 | } | |
213 | ||
ba4e58ec GR |
214 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
215 | int type, int code, int offset, __be32 info, | |
216 | struct hlist_head udptable[] ) | |
1da177e4 LT |
217 | { |
218 | struct ipv6_pinfo *np; | |
219 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
220 | struct in6_addr *saddr = &hdr->saddr; |
221 | struct in6_addr *daddr = &hdr->daddr; | |
222 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
223 | struct sock *sk; | |
224 | int err; | |
225 | ||
ba4e58ec GR |
226 | sk = __udp6_lib_lookup(daddr, uh->dest, |
227 | saddr, uh->source, inet6_iif(skb), udptable); | |
1da177e4 LT |
228 | if (sk == NULL) |
229 | return; | |
230 | ||
231 | np = inet6_sk(sk); | |
232 | ||
233 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
234 | goto out; | |
235 | ||
236 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
237 | goto out; | |
238 | ||
239 | if (np->recverr) | |
240 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
241 | ||
242 | sk->sk_err = err; | |
243 | sk->sk_error_report(sk); | |
244 | out: | |
245 | sock_put(sk); | |
246 | } | |
247 | ||
ba4e58ec GR |
248 | static __inline__ void udpv6_err(struct sk_buff *skb, |
249 | struct inet6_skb_parm *opt, int type, | |
8e5200f5 | 250 | int code, int offset, __be32 info ) |
ba4e58ec GR |
251 | { |
252 | return __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash); | |
253 | } | |
254 | ||
255 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 256 | { |
ba4e58ec | 257 | struct udp_sock *up = udp_sk(sk); |
a18135eb DM |
258 | int rc; |
259 | ||
ba4e58ec GR |
260 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
261 | goto drop; | |
1da177e4 | 262 | |
ba4e58ec GR |
263 | /* |
264 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
265 | */ | |
266 | if ((up->pcflag & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { | |
267 | ||
268 | if (up->pcrlen == 0) { /* full coverage was set */ | |
269 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
270 | " %d while full coverage %d requested\n", | |
271 | UDP_SKB_CB(skb)->cscov, skb->len); | |
272 | goto drop; | |
273 | } | |
274 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
275 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
276 | "too small, need min %d\n", | |
277 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
278 | goto drop; | |
279 | } | |
1da177e4 LT |
280 | } |
281 | ||
ba4e58ec GR |
282 | if (udp_lib_checksum_complete(skb)) |
283 | goto drop; | |
284 | ||
a18135eb DM |
285 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
286 | /* Note that an ENOMEM error is charged twice */ | |
287 | if (rc == -ENOMEM) | |
ba4e58ec GR |
288 | UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, up->pcflag); |
289 | goto drop; | |
1da177e4 | 290 | } |
ba4e58ec | 291 | UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag); |
1da177e4 | 292 | return 0; |
ba4e58ec GR |
293 | drop: |
294 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag); | |
295 | kfree_skb(skb); | |
296 | return -1; | |
1da177e4 LT |
297 | } |
298 | ||
299 | static struct sock *udp_v6_mcast_next(struct sock *sk, | |
e69a4adc AV |
300 | __be16 loc_port, struct in6_addr *loc_addr, |
301 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
302 | int dif) |
303 | { | |
304 | struct hlist_node *node; | |
305 | struct sock *s = sk; | |
306 | unsigned short num = ntohs(loc_port); | |
307 | ||
308 | sk_for_each_from(s, node) { | |
309 | struct inet_sock *inet = inet_sk(s); | |
310 | ||
95f30b33 | 311 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
1da177e4 LT |
312 | struct ipv6_pinfo *np = inet6_sk(s); |
313 | if (inet->dport) { | |
314 | if (inet->dport != rmt_port) | |
315 | continue; | |
316 | } | |
317 | if (!ipv6_addr_any(&np->daddr) && | |
318 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
319 | continue; | |
320 | ||
321 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
322 | continue; | |
323 | ||
324 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
325 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
326 | continue; | |
1da177e4 LT |
327 | } |
328 | if(!inet6_mc_check(s, loc_addr, rmt_addr)) | |
329 | continue; | |
330 | return s; | |
331 | } | |
332 | } | |
333 | return NULL; | |
334 | } | |
335 | ||
336 | /* | |
337 | * Note: called only from the BH handler context, | |
338 | * so we don't need to lock the hashes. | |
339 | */ | |
ba4e58ec | 340 | static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr, |
1ab1457c | 341 | struct in6_addr *daddr, struct hlist_head udptable[]) |
1da177e4 LT |
342 | { |
343 | struct sock *sk, *sk2; | |
ba4e58ec | 344 | const struct udphdr *uh = skb->h.uh; |
1da177e4 LT |
345 | int dif; |
346 | ||
347 | read_lock(&udp_hash_lock); | |
ba4e58ec | 348 | sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]); |
f2776ff0 | 349 | dif = inet6_iif(skb); |
1da177e4 LT |
350 | sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif); |
351 | if (!sk) { | |
352 | kfree_skb(skb); | |
353 | goto out; | |
354 | } | |
355 | ||
356 | sk2 = sk; | |
357 | while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr, | |
358 | uh->source, saddr, dif))) { | |
359 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); | |
360 | if (buff) | |
361 | udpv6_queue_rcv_skb(sk2, buff); | |
362 | } | |
363 | udpv6_queue_rcv_skb(sk, skb); | |
364 | out: | |
365 | read_unlock(&udp_hash_lock); | |
ba4e58ec | 366 | return 0; |
1da177e4 LT |
367 | } |
368 | ||
ba4e58ec GR |
369 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh) |
370 | ||
371 | { | |
372 | if (uh->check == 0) { | |
373 | /* RFC 2460 section 8.1 says that we SHOULD log | |
374 | this error. Well, it is reasonable. | |
375 | */ | |
376 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
377 | return 1; | |
378 | } | |
379 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
380 | !csum_ipv6_magic(&skb->nh.ipv6h->saddr, &skb->nh.ipv6h->daddr, | |
1ab1457c | 381 | skb->len, IPPROTO_UDP, skb->csum )) |
ba4e58ec GR |
382 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
383 | ||
384 | if (skb->ip_summed != CHECKSUM_UNNECESSARY) | |
868c86bc AV |
385 | skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr, |
386 | &skb->nh.ipv6h->daddr, | |
7d9e9b3d | 387 | skb->len, IPPROTO_UDP, |
868c86bc | 388 | 0)); |
ba4e58ec GR |
389 | |
390 | return (UDP_SKB_CB(skb)->partial_cov = 0); | |
391 | } | |
392 | ||
393 | int __udp6_lib_rcv(struct sk_buff **pskb, struct hlist_head udptable[], | |
394 | int is_udplite) | |
1da177e4 LT |
395 | { |
396 | struct sk_buff *skb = *pskb; | |
397 | struct sock *sk; | |
1ab1457c | 398 | struct udphdr *uh; |
1da177e4 LT |
399 | struct net_device *dev = skb->dev; |
400 | struct in6_addr *saddr, *daddr; | |
401 | u32 ulen = 0; | |
402 | ||
403 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
404 | goto short_packet; | |
405 | ||
406 | saddr = &skb->nh.ipv6h->saddr; | |
407 | daddr = &skb->nh.ipv6h->daddr; | |
408 | uh = skb->h.uh; | |
409 | ||
410 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
411 | if (ulen > skb->len) |
412 | goto short_packet; | |
1da177e4 | 413 | |
ba4e58ec | 414 | if(! is_udplite ) { /* UDP validates ulen. */ |
1da177e4 | 415 | |
ba4e58ec GR |
416 | /* Check for jumbo payload */ |
417 | if (ulen == 0) | |
418 | ulen = skb->len; | |
1da177e4 | 419 | |
ba4e58ec GR |
420 | if (ulen < sizeof(*uh)) |
421 | goto short_packet; | |
1da177e4 | 422 | |
ba4e58ec GR |
423 | if (ulen < skb->len) { |
424 | if (pskb_trim_rcsum(skb, ulen)) | |
425 | goto short_packet; | |
426 | saddr = &skb->nh.ipv6h->saddr; | |
427 | daddr = &skb->nh.ipv6h->daddr; | |
428 | uh = skb->h.uh; | |
429 | } | |
1da177e4 | 430 | |
ba4e58ec GR |
431 | if (udp6_csum_init(skb, uh)) |
432 | goto discard; | |
fb286bb2 | 433 | |
ba4e58ec GR |
434 | } else { /* UDP-Lite validates cscov. */ |
435 | if (udplite6_csum_init(skb, uh)) | |
436 | goto discard; | |
437 | } | |
1da177e4 | 438 | |
1ab1457c YH |
439 | /* |
440 | * Multicast receive code | |
1da177e4 | 441 | */ |
ba4e58ec GR |
442 | if (ipv6_addr_is_multicast(daddr)) |
443 | return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable); | |
1da177e4 LT |
444 | |
445 | /* Unicast */ | |
446 | ||
1ab1457c | 447 | /* |
1da177e4 LT |
448 | * check socket cache ... must talk to Alan about his plans |
449 | * for sock caches... i'll skip this for now. | |
450 | */ | |
ba4e58ec GR |
451 | sk = __udp6_lib_lookup(saddr, uh->source, |
452 | daddr, uh->dest, inet6_iif(skb), udptable); | |
1da177e4 LT |
453 | |
454 | if (sk == NULL) { | |
455 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
456 | goto discard; | |
457 | ||
ba4e58ec | 458 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 459 | goto discard; |
ba4e58ec | 460 | UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, is_udplite); |
1da177e4 LT |
461 | |
462 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); | |
463 | ||
464 | kfree_skb(skb); | |
465 | return(0); | |
466 | } | |
1ab1457c | 467 | |
1da177e4 | 468 | /* deliver */ |
1ab1457c | 469 | |
1da177e4 LT |
470 | udpv6_queue_rcv_skb(sk, skb); |
471 | sock_put(sk); | |
472 | return(0); | |
473 | ||
1ab1457c | 474 | short_packet: |
ba4e58ec GR |
475 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
476 | is_udplite? "-Lite" : "", ulen, skb->len); | |
1da177e4 LT |
477 | |
478 | discard: | |
ba4e58ec | 479 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite); |
1da177e4 | 480 | kfree_skb(skb); |
1ab1457c | 481 | return(0); |
1da177e4 | 482 | } |
ba4e58ec GR |
483 | |
484 | static __inline__ int udpv6_rcv(struct sk_buff **pskb) | |
485 | { | |
486 | return __udp6_lib_rcv(pskb, udp_hash, 0); | |
487 | } | |
488 | ||
1da177e4 LT |
489 | /* |
490 | * Throw away all pending data and cancel the corking. Socket is locked. | |
491 | */ | |
492 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
493 | { | |
494 | struct udp_sock *up = udp_sk(sk); | |
495 | ||
496 | if (up->pending) { | |
497 | up->len = 0; | |
498 | up->pending = 0; | |
499 | ip6_flush_pending_frames(sk); | |
1ab1457c | 500 | } |
1da177e4 LT |
501 | } |
502 | ||
503 | /* | |
504 | * Sending | |
505 | */ | |
506 | ||
4c0a6cb0 | 507 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
508 | { |
509 | struct sk_buff *skb; | |
510 | struct udphdr *uh; | |
4c0a6cb0 | 511 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
512 | struct inet_sock *inet = inet_sk(sk); |
513 | struct flowi *fl = &inet->cork.fl; | |
514 | int err = 0; | |
868c86bc | 515 | __wsum csum = 0; |
1da177e4 LT |
516 | |
517 | /* Grab the skbuff where UDP header space exists. */ | |
518 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
519 | goto out; | |
520 | ||
521 | /* | |
522 | * Create a UDP header | |
523 | */ | |
524 | uh = skb->h.uh; | |
525 | uh->source = fl->fl_ip_sport; | |
526 | uh->dest = fl->fl_ip_dport; | |
527 | uh->len = htons(up->len); | |
528 | uh->check = 0; | |
529 | ||
ba4e58ec GR |
530 | if (up->pcflag) |
531 | csum = udplite_csum_outgoing(sk, skb); | |
532 | else | |
533 | csum = udp_csum_outgoing(sk, skb); | |
1da177e4 | 534 | |
ba4e58ec GR |
535 | /* add protocol-dependent pseudo-header */ |
536 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
537 | up->len, fl->proto, csum ); | |
1da177e4 | 538 | if (uh->check == 0) |
f6ab0288 | 539 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 540 | |
1da177e4 LT |
541 | err = ip6_push_pending_frames(sk); |
542 | out: | |
543 | up->len = 0; | |
544 | up->pending = 0; | |
545 | return err; | |
546 | } | |
547 | ||
ba4e58ec | 548 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
549 | struct msghdr *msg, size_t len) |
550 | { | |
551 | struct ipv6_txoptions opt_space; | |
552 | struct udp_sock *up = udp_sk(sk); | |
553 | struct inet_sock *inet = inet_sk(sk); | |
554 | struct ipv6_pinfo *np = inet6_sk(sk); | |
555 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
556 | struct in6_addr *daddr, *final_p = NULL, final; | |
557 | struct ipv6_txoptions *opt = NULL; | |
558 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 559 | struct flowi fl; |
1da177e4 LT |
560 | struct dst_entry *dst; |
561 | int addr_len = msg->msg_namelen; | |
562 | int ulen = len; | |
563 | int hlimit = -1; | |
41a1f8ea | 564 | int tclass = -1; |
1da177e4 LT |
565 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
566 | int err; | |
987905de | 567 | int connected = 0; |
ba4e58ec GR |
568 | int is_udplite = up->pcflag; |
569 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); | |
1da177e4 LT |
570 | |
571 | /* destination address check */ | |
572 | if (sin6) { | |
573 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
574 | return -EINVAL; | |
575 | ||
576 | switch (sin6->sin6_family) { | |
577 | case AF_INET6: | |
578 | if (addr_len < SIN6_LEN_RFC2133) | |
579 | return -EINVAL; | |
580 | daddr = &sin6->sin6_addr; | |
581 | break; | |
582 | case AF_INET: | |
583 | goto do_udp_sendmsg; | |
584 | case AF_UNSPEC: | |
585 | msg->msg_name = sin6 = NULL; | |
586 | msg->msg_namelen = addr_len = 0; | |
587 | daddr = NULL; | |
588 | break; | |
589 | default: | |
590 | return -EINVAL; | |
591 | } | |
592 | } else if (!up->pending) { | |
593 | if (sk->sk_state != TCP_ESTABLISHED) | |
594 | return -EDESTADDRREQ; | |
595 | daddr = &np->daddr; | |
1ab1457c | 596 | } else |
1da177e4 LT |
597 | daddr = NULL; |
598 | ||
599 | if (daddr) { | |
600 | if (ipv6_addr_type(daddr) == IPV6_ADDR_MAPPED) { | |
601 | struct sockaddr_in sin; | |
602 | sin.sin_family = AF_INET; | |
603 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; | |
604 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; | |
605 | msg->msg_name = &sin; | |
606 | msg->msg_namelen = sizeof(sin); | |
607 | do_udp_sendmsg: | |
608 | if (__ipv6_only_sock(sk)) | |
609 | return -ENETUNREACH; | |
610 | return udp_sendmsg(iocb, sk, msg, len); | |
611 | } | |
612 | } | |
613 | ||
614 | if (up->pending == AF_INET) | |
615 | return udp_sendmsg(iocb, sk, msg, len); | |
616 | ||
617 | /* Rough check on arithmetic overflow, | |
b59e139b | 618 | better check is made in ip6_append_data(). |
1da177e4 LT |
619 | */ |
620 | if (len > INT_MAX - sizeof(struct udphdr)) | |
621 | return -EMSGSIZE; | |
1ab1457c | 622 | |
1da177e4 LT |
623 | if (up->pending) { |
624 | /* | |
625 | * There are pending frames. | |
626 | * The socket lock must be held while it's corked. | |
627 | */ | |
628 | lock_sock(sk); | |
629 | if (likely(up->pending)) { | |
630 | if (unlikely(up->pending != AF_INET6)) { | |
631 | release_sock(sk); | |
632 | return -EAFNOSUPPORT; | |
633 | } | |
634 | dst = NULL; | |
635 | goto do_append_data; | |
636 | } | |
637 | release_sock(sk); | |
638 | } | |
639 | ulen += sizeof(struct udphdr); | |
640 | ||
132a55f3 | 641 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
642 | |
643 | if (sin6) { | |
644 | if (sin6->sin6_port == 0) | |
645 | return -EINVAL; | |
646 | ||
132a55f3 | 647 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
648 | daddr = &sin6->sin6_addr; |
649 | ||
650 | if (np->sndflow) { | |
132a55f3 HX |
651 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
652 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
653 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
654 | if (flowlabel == NULL) |
655 | return -EINVAL; | |
656 | daddr = &flowlabel->dst; | |
657 | } | |
658 | } | |
659 | ||
660 | /* | |
661 | * Otherwise it will be difficult to maintain | |
662 | * sk->sk_dst_cache. | |
663 | */ | |
664 | if (sk->sk_state == TCP_ESTABLISHED && | |
665 | ipv6_addr_equal(daddr, &np->daddr)) | |
666 | daddr = &np->daddr; | |
667 | ||
668 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
669 | sin6->sin6_scope_id && | |
670 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 671 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
672 | } else { |
673 | if (sk->sk_state != TCP_ESTABLISHED) | |
674 | return -EDESTADDRREQ; | |
675 | ||
132a55f3 | 676 | fl.fl_ip_dport = inet->dport; |
1da177e4 | 677 | daddr = &np->daddr; |
132a55f3 | 678 | fl.fl6_flowlabel = np->flow_label; |
987905de | 679 | connected = 1; |
1da177e4 LT |
680 | } |
681 | ||
132a55f3 HX |
682 | if (!fl.oif) |
683 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
684 | |
685 | if (msg->msg_controllen) { | |
686 | opt = &opt_space; | |
687 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
688 | opt->tot_len = sizeof(*opt); | |
689 | ||
132a55f3 | 690 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
1da177e4 LT |
691 | if (err < 0) { |
692 | fl6_sock_release(flowlabel); | |
693 | return err; | |
694 | } | |
132a55f3 HX |
695 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
696 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
697 | if (flowlabel == NULL) |
698 | return -EINVAL; | |
699 | } | |
700 | if (!(opt->opt_nflen|opt->opt_flen)) | |
701 | opt = NULL; | |
987905de | 702 | connected = 0; |
1da177e4 LT |
703 | } |
704 | if (opt == NULL) | |
705 | opt = np->opt; | |
df9890c3 YH |
706 | if (flowlabel) |
707 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
708 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 709 | |
ba4e58ec | 710 | fl.proto = sk->sk_protocol; |
132a55f3 HX |
711 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
712 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) | |
713 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
714 | fl.fl_ip_sport = inet->sport; | |
1ab1457c | 715 | |
1da177e4 LT |
716 | /* merge ip6_build_xmit from ip6_output */ |
717 | if (opt && opt->srcrt) { | |
718 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
719 | ipv6_addr_copy(&final, &fl.fl6_dst); |
720 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 721 | final_p = &final; |
987905de | 722 | connected = 0; |
1da177e4 LT |
723 | } |
724 | ||
132a55f3 HX |
725 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
726 | fl.oif = np->mcast_oif; | |
987905de MK |
727 | connected = 0; |
728 | } | |
1da177e4 | 729 | |
132a55f3 | 730 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 731 | |
132a55f3 | 732 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
733 | if (err) |
734 | goto out; | |
735 | if (final_p) | |
132a55f3 | 736 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 737 | |
8eb9086f | 738 | if ((err = xfrm_lookup(&dst, &fl, sk, 1)) < 0) |
1da177e4 | 739 | goto out; |
1da177e4 LT |
740 | |
741 | if (hlimit < 0) { | |
132a55f3 | 742 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
743 | hlimit = np->mcast_hops; |
744 | else | |
745 | hlimit = np->hop_limit; | |
746 | if (hlimit < 0) | |
747 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); | |
748 | if (hlimit < 0) | |
749 | hlimit = ipv6_get_hoplimit(dst->dev); | |
750 | } | |
751 | ||
41a1f8ea YH |
752 | if (tclass < 0) { |
753 | tclass = np->tclass; | |
754 | if (tclass < 0) | |
755 | tclass = 0; | |
756 | } | |
757 | ||
1da177e4 LT |
758 | if (msg->msg_flags&MSG_CONFIRM) |
759 | goto do_confirm; | |
760 | back_from_confirm: | |
761 | ||
762 | lock_sock(sk); | |
763 | if (unlikely(up->pending)) { | |
764 | /* The socket is already corked while preparing it. */ | |
765 | /* ... which is an evident application bug. --ANK */ | |
766 | release_sock(sk); | |
767 | ||
64ce2073 | 768 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
769 | err = -EINVAL; |
770 | goto out; | |
771 | } | |
772 | ||
773 | up->pending = AF_INET6; | |
774 | ||
775 | do_append_data: | |
776 | up->len += ulen; | |
ba4e58ec GR |
777 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
778 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 779 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea YH |
780 | (struct rt6_info*)dst, |
781 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); | |
1da177e4 LT |
782 | if (err) |
783 | udp_v6_flush_pending_frames(sk); | |
784 | else if (!corkreq) | |
4c0a6cb0 | 785 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
786 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
787 | up->pending = 0; | |
1da177e4 | 788 | |
a5e7c210 DM |
789 | if (dst) { |
790 | if (connected) { | |
791 | ip6_dst_store(sk, dst, | |
132a55f3 | 792 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
793 | &np->daddr : NULL, |
794 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 795 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
796 | &np->saddr : |
797 | #endif | |
798 | NULL); | |
a5e7c210 DM |
799 | } else { |
800 | dst_release(dst); | |
801 | } | |
802 | } | |
803 | ||
1da177e4 LT |
804 | if (err > 0) |
805 | err = np->recverr ? net_xmit_errno(err) : 0; | |
806 | release_sock(sk); | |
807 | out: | |
808 | fl6_sock_release(flowlabel); | |
809 | if (!err) { | |
ba4e58ec | 810 | UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite); |
1da177e4 LT |
811 | return len; |
812 | } | |
a18135eb DM |
813 | /* |
814 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
815 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
816 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
817 | * things). We could add another new stat but at least for now that | |
818 | * seems like overkill. | |
819 | */ | |
820 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
ba4e58ec | 821 | UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite); |
a18135eb | 822 | } |
1da177e4 LT |
823 | return err; |
824 | ||
825 | do_confirm: | |
826 | dst_confirm(dst); | |
827 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
828 | goto back_from_confirm; | |
829 | err = 0; | |
830 | goto out; | |
831 | } | |
832 | ||
ba4e58ec | 833 | int udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
834 | { |
835 | lock_sock(sk); | |
836 | udp_v6_flush_pending_frames(sk); | |
837 | release_sock(sk); | |
838 | ||
839 | inet6_destroy_sock(sk); | |
840 | ||
841 | return 0; | |
842 | } | |
843 | ||
844 | /* | |
845 | * Socket option code for UDP | |
846 | */ | |
ba4e58ec GR |
847 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
848 | char __user *optval, int optlen) | |
3fdadf7d | 849 | { |
ba4e58ec | 850 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
851 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
852 | udp_v6_push_pending_frames); | |
ba4e58ec | 853 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
854 | } |
855 | ||
856 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
857 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
858 | char __user *optval, int optlen) | |
3fdadf7d | 859 | { |
ba4e58ec | 860 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
861 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
862 | udp_v6_push_pending_frames); | |
ba4e58ec | 863 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
864 | } |
865 | #endif | |
866 | ||
ba4e58ec GR |
867 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
868 | char __user *optval, int __user *optlen) | |
3fdadf7d | 869 | { |
ba4e58ec | 870 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 871 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 872 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
873 | } |
874 | ||
875 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
876 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
877 | char __user *optval, int __user *optlen) | |
3fdadf7d | 878 | { |
ba4e58ec | 879 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 880 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 881 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
882 | } |
883 | #endif | |
884 | ||
1da177e4 LT |
885 | static struct inet6_protocol udpv6_protocol = { |
886 | .handler = udpv6_rcv, | |
887 | .err_handler = udpv6_err, | |
888 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
889 | }; | |
890 | ||
891 | /* ------------------------------------------------------------------------ */ | |
892 | #ifdef CONFIG_PROC_FS | |
893 | ||
894 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
895 | { | |
896 | struct inet_sock *inet = inet_sk(sp); | |
897 | struct ipv6_pinfo *np = inet6_sk(sp); | |
898 | struct in6_addr *dest, *src; | |
899 | __u16 destp, srcp; | |
900 | ||
901 | dest = &np->daddr; | |
902 | src = &np->rcv_saddr; | |
903 | destp = ntohs(inet->dport); | |
904 | srcp = ntohs(inet->sport); | |
905 | seq_printf(seq, | |
906 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " | |
907 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", | |
908 | bucket, | |
909 | src->s6_addr32[0], src->s6_addr32[1], | |
910 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
911 | dest->s6_addr32[0], dest->s6_addr32[1], | |
912 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 913 | sp->sk_state, |
1da177e4 LT |
914 | atomic_read(&sp->sk_wmem_alloc), |
915 | atomic_read(&sp->sk_rmem_alloc), | |
916 | 0, 0L, 0, | |
917 | sock_i_uid(sp), 0, | |
918 | sock_i_ino(sp), | |
919 | atomic_read(&sp->sk_refcnt), sp); | |
920 | } | |
921 | ||
ba4e58ec | 922 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
923 | { |
924 | if (v == SEQ_START_TOKEN) | |
925 | seq_printf(seq, | |
926 | " sl " | |
927 | "local_address " | |
928 | "remote_address " | |
929 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
930 | " uid timeout inode\n"); | |
931 | else | |
932 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
933 | return 0; | |
934 | } | |
935 | ||
936 | static struct file_operations udp6_seq_fops; | |
937 | static struct udp_seq_afinfo udp6_seq_afinfo = { | |
938 | .owner = THIS_MODULE, | |
939 | .name = "udp6", | |
940 | .family = AF_INET6, | |
ba4e58ec | 941 | .hashtable = udp_hash, |
1da177e4 LT |
942 | .seq_show = udp6_seq_show, |
943 | .seq_fops = &udp6_seq_fops, | |
944 | }; | |
945 | ||
946 | int __init udp6_proc_init(void) | |
947 | { | |
948 | return udp_proc_register(&udp6_seq_afinfo); | |
949 | } | |
950 | ||
951 | void udp6_proc_exit(void) { | |
952 | udp_proc_unregister(&udp6_seq_afinfo); | |
953 | } | |
954 | #endif /* CONFIG_PROC_FS */ | |
955 | ||
956 | /* ------------------------------------------------------------------------ */ | |
957 | ||
958 | struct proto udpv6_prot = { | |
543d9cfe ACM |
959 | .name = "UDPv6", |
960 | .owner = THIS_MODULE, | |
ba4e58ec | 961 | .close = udp_lib_close, |
543d9cfe ACM |
962 | .connect = ip6_datagram_connect, |
963 | .disconnect = udp_disconnect, | |
964 | .ioctl = udp_ioctl, | |
965 | .destroy = udpv6_destroy_sock, | |
966 | .setsockopt = udpv6_setsockopt, | |
967 | .getsockopt = udpv6_getsockopt, | |
968 | .sendmsg = udpv6_sendmsg, | |
969 | .recvmsg = udpv6_recvmsg, | |
970 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
971 | .hash = udp_lib_hash, |
972 | .unhash = udp_lib_unhash, | |
543d9cfe ACM |
973 | .get_port = udp_v6_get_port, |
974 | .obj_size = sizeof(struct udp6_sock), | |
3fdadf7d | 975 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
976 | .compat_setsockopt = compat_udpv6_setsockopt, |
977 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 978 | #endif |
1da177e4 LT |
979 | }; |
980 | ||
1da177e4 LT |
981 | static struct inet_protosw udpv6_protosw = { |
982 | .type = SOCK_DGRAM, | |
983 | .protocol = IPPROTO_UDP, | |
984 | .prot = &udpv6_prot, | |
985 | .ops = &inet6_dgram_ops, | |
986 | .capability =-1, | |
987 | .no_check = UDP_CSUM_DEFAULT, | |
988 | .flags = INET_PROTOSW_PERMANENT, | |
989 | }; | |
990 | ||
991 | ||
992 | void __init udpv6_init(void) | |
993 | { | |
994 | if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0) | |
995 | printk(KERN_ERR "udpv6_init: Could not register protocol\n"); | |
996 | inet6_register_protosw(&udpv6_protosw); | |
997 | } |