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> |
5a0e3ad6 | 37 | #include <linux/slab.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 | |
b2f5e7cd VY |
53 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
54 | { | |
55 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
56 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); | |
c720c7e8 | 57 | __be32 sk1_rcv_saddr = inet_sk(sk)->inet_rcv_saddr; |
499923c7 | 58 | __be32 sk2_rcv_saddr = inet_rcv_saddr(sk2); |
b2f5e7cd VY |
59 | int sk_ipv6only = ipv6_only_sock(sk); |
60 | int sk2_ipv6only = inet_v6_ipv6only(sk2); | |
61 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); | |
62 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
63 | ||
64 | /* if both are mapped, treat as IPv4 */ | |
65 | if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) | |
499923c7 | 66 | return (!sk2_ipv6only && |
c720c7e8 ED |
67 | (!sk1_rcv_saddr || !sk2_rcv_saddr || |
68 | sk1_rcv_saddr == sk2_rcv_saddr)); | |
b2f5e7cd VY |
69 | |
70 | if (addr_type2 == IPV6_ADDR_ANY && | |
71 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
72 | return 1; | |
73 | ||
74 | if (addr_type == IPV6_ADDR_ANY && | |
75 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
76 | return 1; | |
77 | ||
78 | if (sk2_rcv_saddr6 && | |
79 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
80 | return 1; | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
d4cada4a ED |
85 | static unsigned int udp6_portaddr_hash(struct net *net, |
86 | const struct in6_addr *addr6, | |
87 | unsigned int port) | |
88 | { | |
89 | unsigned int hash, mix = net_hash_mix(net); | |
90 | ||
91 | if (ipv6_addr_any(addr6)) | |
92 | hash = jhash_1word(0, mix); | |
856540ee | 93 | else if (ipv6_addr_v4mapped(addr6)) |
0eae88f3 | 94 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
d4cada4a | 95 | else |
0eae88f3 | 96 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
d4cada4a ED |
97 | |
98 | return hash ^ port; | |
99 | } | |
100 | ||
101 | ||
6ba5a3c5 | 102 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 103 | { |
30fff923 ED |
104 | unsigned int hash2_nulladdr = |
105 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); | |
106 | unsigned int hash2_partial = | |
107 | udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); | |
108 | ||
d4cada4a | 109 | /* precompute partial secondary hash */ |
30fff923 ED |
110 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
111 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); | |
1da177e4 LT |
112 | } |
113 | ||
645ca708 ED |
114 | static inline int compute_score(struct sock *sk, struct net *net, |
115 | unsigned short hnum, | |
116 | struct in6_addr *saddr, __be16 sport, | |
117 | struct in6_addr *daddr, __be16 dport, | |
118 | int dif) | |
119 | { | |
120 | int score = -1; | |
121 | ||
d4cada4a | 122 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
645ca708 ED |
123 | sk->sk_family == PF_INET6) { |
124 | struct ipv6_pinfo *np = inet6_sk(sk); | |
125 | struct inet_sock *inet = inet_sk(sk); | |
126 | ||
127 | score = 0; | |
c720c7e8 ED |
128 | if (inet->inet_dport) { |
129 | if (inet->inet_dport != sport) | |
645ca708 ED |
130 | return -1; |
131 | score++; | |
132 | } | |
133 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
134 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
135 | return -1; | |
136 | score++; | |
137 | } | |
138 | if (!ipv6_addr_any(&np->daddr)) { | |
139 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
140 | return -1; | |
141 | score++; | |
142 | } | |
143 | if (sk->sk_bound_dev_if) { | |
144 | if (sk->sk_bound_dev_if != dif) | |
145 | return -1; | |
146 | score++; | |
147 | } | |
148 | } | |
149 | return score; | |
150 | } | |
151 | ||
fddc17de ED |
152 | #define SCORE2_MAX (1 + 1 + 1) |
153 | static inline int compute_score2(struct sock *sk, struct net *net, | |
154 | const struct in6_addr *saddr, __be16 sport, | |
155 | const struct in6_addr *daddr, unsigned short hnum, | |
156 | int dif) | |
157 | { | |
158 | int score = -1; | |
159 | ||
160 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && | |
161 | sk->sk_family == PF_INET6) { | |
162 | struct ipv6_pinfo *np = inet6_sk(sk); | |
163 | struct inet_sock *inet = inet_sk(sk); | |
164 | ||
165 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
166 | return -1; | |
167 | score = 0; | |
168 | if (inet->inet_dport) { | |
169 | if (inet->inet_dport != sport) | |
170 | return -1; | |
171 | score++; | |
172 | } | |
173 | if (!ipv6_addr_any(&np->daddr)) { | |
174 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
175 | return -1; | |
176 | score++; | |
177 | } | |
178 | if (sk->sk_bound_dev_if) { | |
179 | if (sk->sk_bound_dev_if != dif) | |
180 | return -1; | |
181 | score++; | |
182 | } | |
183 | } | |
184 | return score; | |
185 | } | |
186 | ||
fddc17de ED |
187 | |
188 | /* called with read_rcu_lock() */ | |
189 | static struct sock *udp6_lib_lookup2(struct net *net, | |
190 | const struct in6_addr *saddr, __be16 sport, | |
191 | const struct in6_addr *daddr, unsigned int hnum, int dif, | |
192 | struct udp_hslot *hslot2, unsigned int slot2) | |
193 | { | |
194 | struct sock *sk, *result; | |
195 | struct hlist_nulls_node *node; | |
196 | int score, badness; | |
197 | ||
198 | begin: | |
199 | result = NULL; | |
200 | badness = -1; | |
201 | udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { | |
202 | score = compute_score2(sk, net, saddr, sport, | |
203 | daddr, hnum, dif); | |
204 | if (score > badness) { | |
205 | result = sk; | |
206 | badness = score; | |
207 | if (score == SCORE2_MAX) | |
208 | goto exact_match; | |
209 | } | |
210 | } | |
211 | /* | |
212 | * if the nulls value we got at the end of this lookup is | |
213 | * not the expected one, we must restart lookup. | |
214 | * We probably met an item that was moved to another chain. | |
215 | */ | |
216 | if (get_nulls_value(node) != slot2) | |
217 | goto begin; | |
218 | ||
219 | if (result) { | |
220 | exact_match: | |
221 | if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) | |
222 | result = NULL; | |
223 | else if (unlikely(compute_score2(result, net, saddr, sport, | |
224 | daddr, hnum, dif) < badness)) { | |
225 | sock_put(result); | |
226 | goto begin; | |
227 | } | |
228 | } | |
229 | return result; | |
230 | } | |
231 | ||
fa4d3c62 PE |
232 | static struct sock *__udp6_lib_lookup(struct net *net, |
233 | struct in6_addr *saddr, __be16 sport, | |
ba4e58ec | 234 | struct in6_addr *daddr, __be16 dport, |
645ca708 | 235 | int dif, struct udp_table *udptable) |
1da177e4 | 236 | { |
271b72c7 | 237 | struct sock *sk, *result; |
88ab1932 | 238 | struct hlist_nulls_node *node; |
1da177e4 | 239 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
240 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
241 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
271b72c7 | 242 | int score, badness; |
645ca708 | 243 | |
271b72c7 | 244 | rcu_read_lock(); |
fddc17de ED |
245 | if (hslot->count > 10) { |
246 | hash2 = udp6_portaddr_hash(net, daddr, hnum); | |
247 | slot2 = hash2 & udptable->mask; | |
248 | hslot2 = &udptable->hash2[slot2]; | |
249 | if (hslot->count < hslot2->count) | |
250 | goto begin; | |
251 | ||
252 | result = udp6_lib_lookup2(net, saddr, sport, | |
253 | daddr, hnum, dif, | |
254 | hslot2, slot2); | |
255 | if (!result) { | |
256 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); | |
257 | slot2 = hash2 & udptable->mask; | |
258 | hslot2 = &udptable->hash2[slot2]; | |
259 | if (hslot->count < hslot2->count) | |
260 | goto begin; | |
261 | ||
1223c67c JBD |
262 | result = udp6_lib_lookup2(net, saddr, sport, |
263 | &in6addr_any, hnum, dif, | |
fddc17de ED |
264 | hslot2, slot2); |
265 | } | |
266 | rcu_read_unlock(); | |
267 | return result; | |
268 | } | |
271b72c7 ED |
269 | begin: |
270 | result = NULL; | |
271 | badness = -1; | |
88ab1932 | 272 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
273 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
274 | if (score > badness) { | |
275 | result = sk; | |
276 | badness = score; | |
1da177e4 LT |
277 | } |
278 | } | |
88ab1932 ED |
279 | /* |
280 | * if the nulls value we got at the end of this lookup is | |
281 | * not the expected one, we must restart lookup. | |
282 | * We probably met an item that was moved to another chain. | |
283 | */ | |
fddc17de | 284 | if (get_nulls_value(node) != slot) |
88ab1932 ED |
285 | goto begin; |
286 | ||
271b72c7 ED |
287 | if (result) { |
288 | if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) | |
289 | result = NULL; | |
290 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
291 | daddr, dport, dif) < badness)) { | |
292 | sock_put(result); | |
293 | goto begin; | |
294 | } | |
295 | } | |
296 | rcu_read_unlock(); | |
1da177e4 LT |
297 | return result; |
298 | } | |
299 | ||
607c4aaf KK |
300 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
301 | __be16 sport, __be16 dport, | |
645ca708 | 302 | struct udp_table *udptable) |
607c4aaf | 303 | { |
23542618 | 304 | struct sock *sk; |
607c4aaf KK |
305 | struct ipv6hdr *iph = ipv6_hdr(skb); |
306 | ||
23542618 KK |
307 | if (unlikely(sk = skb_steal_sock(skb))) |
308 | return sk; | |
adf30907 ED |
309 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
310 | &iph->daddr, dport, inet6_iif(skb), | |
311 | udptable); | |
607c4aaf KK |
312 | } |
313 | ||
1da177e4 LT |
314 | /* |
315 | * This should be easy, if there is something there we | |
316 | * return it, otherwise we block. | |
317 | */ | |
318 | ||
ba4e58ec | 319 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
320 | struct msghdr *msg, size_t len, |
321 | int noblock, int flags, int *addr_len) | |
322 | { | |
323 | struct ipv6_pinfo *np = inet6_sk(sk); | |
324 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 325 | struct sk_buff *skb; |
81d54ec8 | 326 | unsigned int ulen; |
a59322be | 327 | int peeked; |
759e5d00 HX |
328 | int err; |
329 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 330 | int is_udp4; |
1da177e4 | 331 | |
1ab1457c YH |
332 | if (addr_len) |
333 | *addr_len=sizeof(struct sockaddr_in6); | |
334 | ||
1da177e4 LT |
335 | if (flags & MSG_ERRQUEUE) |
336 | return ipv6_recv_error(sk, msg, len); | |
337 | ||
4b340ae2 BH |
338 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
339 | return ipv6_recv_rxpmtu(sk, msg, len); | |
340 | ||
1da177e4 | 341 | try_again: |
a59322be HX |
342 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
343 | &peeked, &err); | |
1da177e4 LT |
344 | if (!skb) |
345 | goto out; | |
346 | ||
759e5d00 | 347 | ulen = skb->len - sizeof(struct udphdr); |
81d54ec8 GR |
348 | if (len > ulen) |
349 | len = ulen; | |
350 | else if (len < ulen) | |
1ab1457c | 351 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 352 | |
f26ba175 WY |
353 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
354 | ||
ba4e58ec | 355 | /* |
759e5d00 HX |
356 | * If checksum is needed at all, try to do it while copying the |
357 | * data. If the data is truncated, or if we only want a partial | |
358 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 359 | */ |
ba4e58ec | 360 | |
81d54ec8 | 361 | if (len < ulen || UDP_SKB_CB(skb)->partial_cov) { |
759e5d00 | 362 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 363 | goto csum_copy_err; |
ba4e58ec GR |
364 | } |
365 | ||
60476372 | 366 | if (skb_csum_unnecessary(skb)) |
ba4e58ec | 367 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
81d54ec8 | 368 | msg->msg_iov,len); |
ba4e58ec | 369 | else { |
1da177e4 LT |
370 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
371 | if (err == -EINVAL) | |
372 | goto csum_copy_err; | |
373 | } | |
374 | if (err) | |
375 | goto out_free; | |
376 | ||
f26ba175 WY |
377 | if (!peeked) { |
378 | if (is_udp4) | |
379 | UDP_INC_STATS_USER(sock_net(sk), | |
380 | UDP_MIB_INDATAGRAMS, is_udplite); | |
381 | else | |
382 | UDP6_INC_STATS_USER(sock_net(sk), | |
383 | UDP_MIB_INDATAGRAMS, is_udplite); | |
384 | } | |
cb75994e | 385 | |
3b885787 | 386 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
387 | |
388 | /* Copy the address. */ | |
389 | if (msg->msg_name) { | |
390 | struct sockaddr_in6 *sin6; | |
1ab1457c | 391 | |
1da177e4 LT |
392 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
393 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 394 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
395 | sin6->sin6_flowinfo = 0; |
396 | sin6->sin6_scope_id = 0; | |
397 | ||
f26ba175 | 398 | if (is_udp4) |
b301e82c BH |
399 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
400 | &sin6->sin6_addr); | |
1da177e4 | 401 | else { |
0660e03f ACM |
402 | ipv6_addr_copy(&sin6->sin6_addr, |
403 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
404 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
405 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
406 | } | |
407 | ||
408 | } | |
f26ba175 | 409 | if (is_udp4) { |
1da177e4 LT |
410 | if (inet->cmsg_flags) |
411 | ip_cmsg_recv(msg, skb); | |
412 | } else { | |
413 | if (np->rxopt.all) | |
414 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 415 | } |
1da177e4 | 416 | |
81d54ec8 | 417 | err = len; |
1da177e4 | 418 | if (flags & MSG_TRUNC) |
759e5d00 | 419 | err = ulen; |
1da177e4 LT |
420 | |
421 | out_free: | |
9d410c79 | 422 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
423 | out: |
424 | return err; | |
425 | ||
426 | csum_copy_err: | |
95766fff | 427 | lock_sock(sk); |
0856f939 WY |
428 | if (!skb_kill_datagram(sk, skb, flags)) { |
429 | if (is_udp4) | |
430 | UDP_INC_STATS_USER(sock_net(sk), | |
431 | UDP_MIB_INERRORS, is_udplite); | |
432 | else | |
433 | UDP6_INC_STATS_USER(sock_net(sk), | |
434 | UDP_MIB_INERRORS, is_udplite); | |
435 | } | |
95766fff | 436 | release_sock(sk); |
1da177e4 | 437 | |
7a0ff716 | 438 | if (flags & MSG_DONTWAIT) |
1da177e4 | 439 | return -EAGAIN; |
1da177e4 LT |
440 | goto try_again; |
441 | } | |
442 | ||
ba4e58ec | 443 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 444 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 445 | struct udp_table *udptable) |
1da177e4 LT |
446 | { |
447 | struct ipv6_pinfo *np; | |
448 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
449 | struct in6_addr *saddr = &hdr->saddr; |
450 | struct in6_addr *daddr = &hdr->daddr; | |
451 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
452 | struct sock *sk; | |
453 | int err; | |
454 | ||
c346dca1 | 455 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 456 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
457 | if (sk == NULL) |
458 | return; | |
459 | ||
460 | np = inet6_sk(sk); | |
461 | ||
462 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
463 | goto out; | |
464 | ||
465 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
466 | goto out; | |
467 | ||
468 | if (np->recverr) | |
469 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); | |
470 | ||
471 | sk->sk_err = err; | |
472 | sk->sk_error_report(sk); | |
473 | out: | |
474 | sock_put(sk); | |
475 | } | |
476 | ||
ba4e58ec | 477 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
478 | struct inet6_skb_parm *opt, u8 type, |
479 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 480 | { |
645ca708 | 481 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
482 | } |
483 | ||
484 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 485 | { |
ba4e58ec | 486 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 487 | int rc; |
b2bf1e26 | 488 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 489 | |
ba4e58ec GR |
490 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
491 | goto drop; | |
1da177e4 | 492 | |
ba4e58ec GR |
493 | /* |
494 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
495 | */ | |
b2bf1e26 | 496 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
497 | |
498 | if (up->pcrlen == 0) { /* full coverage was set */ | |
499 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
500 | " %d while full coverage %d requested\n", | |
501 | UDP_SKB_CB(skb)->cscov, skb->len); | |
502 | goto drop; | |
503 | } | |
504 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
505 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
506 | "too small, need min %d\n", | |
507 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
508 | goto drop; | |
509 | } | |
1da177e4 LT |
510 | } |
511 | ||
1ab6eb62 HX |
512 | if (sk->sk_filter) { |
513 | if (udp_lib_checksum_complete(skb)) | |
514 | goto drop; | |
515 | } | |
ba4e58ec | 516 | |
766e9037 | 517 | if ((rc = sock_queue_rcv_skb(sk, skb)) < 0) { |
a18135eb | 518 | /* Note that an ENOMEM error is charged twice */ |
766e9037 | 519 | if (rc == -ENOMEM) |
ef28d1a2 PE |
520 | UDP6_INC_STATS_BH(sock_net(sk), |
521 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
8edf19c2 | 522 | goto drop_no_sk_drops_inc; |
1da177e4 | 523 | } |
cb75994e | 524 | |
1da177e4 | 525 | return 0; |
ba4e58ec | 526 | drop: |
8edf19c2 ED |
527 | atomic_inc(&sk->sk_drops); |
528 | drop_no_sk_drops_inc: | |
ef28d1a2 | 529 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
530 | kfree_skb(skb); |
531 | return -1; | |
1da177e4 LT |
532 | } |
533 | ||
920a4611 | 534 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
535 | __be16 loc_port, struct in6_addr *loc_addr, |
536 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
537 | int dif) |
538 | { | |
88ab1932 | 539 | struct hlist_nulls_node *node; |
1da177e4 LT |
540 | struct sock *s = sk; |
541 | unsigned short num = ntohs(loc_port); | |
542 | ||
88ab1932 | 543 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
544 | struct inet_sock *inet = inet_sk(s); |
545 | ||
920a4611 | 546 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
547 | continue; |
548 | ||
d4cada4a ED |
549 | if (udp_sk(s)->udp_port_hash == num && |
550 | s->sk_family == PF_INET6) { | |
1da177e4 | 551 | struct ipv6_pinfo *np = inet6_sk(s); |
c720c7e8 ED |
552 | if (inet->inet_dport) { |
553 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
554 | continue; |
555 | } | |
556 | if (!ipv6_addr_any(&np->daddr) && | |
557 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
558 | continue; | |
559 | ||
560 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
561 | continue; | |
562 | ||
563 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
564 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
565 | continue; | |
1da177e4 | 566 | } |
add459aa | 567 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
568 | continue; |
569 | return s; | |
570 | } | |
571 | } | |
572 | return NULL; | |
573 | } | |
574 | ||
a1ab77f9 ED |
575 | static void flush_stack(struct sock **stack, unsigned int count, |
576 | struct sk_buff *skb, unsigned int final) | |
577 | { | |
578 | unsigned int i; | |
579 | struct sock *sk; | |
580 | struct sk_buff *skb1; | |
581 | ||
582 | for (i = 0; i < count; i++) { | |
583 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
584 | ||
f6b8f32c | 585 | sk = stack[i]; |
a1ab77f9 | 586 | if (skb1) { |
a1ab77f9 ED |
587 | bh_lock_sock(sk); |
588 | if (!sock_owned_by_user(sk)) | |
589 | udpv6_queue_rcv_skb(sk, skb1); | |
a3a858ff | 590 | else if (sk_add_backlog(sk, skb1)) { |
55349790 ZY |
591 | kfree_skb(skb1); |
592 | bh_unlock_sock(sk); | |
593 | goto drop; | |
594 | } | |
a1ab77f9 | 595 | bh_unlock_sock(sk); |
55349790 | 596 | continue; |
a1ab77f9 | 597 | } |
55349790 ZY |
598 | drop: |
599 | atomic_inc(&sk->sk_drops); | |
600 | UDP6_INC_STATS_BH(sock_net(sk), | |
601 | UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); | |
602 | UDP6_INC_STATS_BH(sock_net(sk), | |
603 | UDP_MIB_INERRORS, IS_UDPLITE(sk)); | |
a1ab77f9 ED |
604 | } |
605 | } | |
1da177e4 LT |
606 | /* |
607 | * Note: called only from the BH handler context, | |
608 | * so we don't need to lock the hashes. | |
609 | */ | |
e3163493 PE |
610 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
611 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 612 | struct udp_table *udptable) |
1da177e4 | 613 | { |
a1ab77f9 | 614 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 615 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 616 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 617 | int dif; |
a1ab77f9 | 618 | unsigned int i, count = 0; |
1da177e4 | 619 | |
645ca708 | 620 | spin_lock(&hslot->lock); |
88ab1932 | 621 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 622 | dif = inet6_iif(skb); |
920a4611 | 623 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
624 | while (sk) { |
625 | stack[count++] = sk; | |
626 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
627 | uh->source, saddr, dif); | |
628 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
629 | if (!sk) | |
630 | break; | |
631 | flush_stack(stack, count, skb, ~0); | |
632 | count = 0; | |
95766fff | 633 | } |
1da177e4 | 634 | } |
a1ab77f9 ED |
635 | /* |
636 | * before releasing the lock, we must take reference on sockets | |
637 | */ | |
638 | for (i = 0; i < count; i++) | |
639 | sock_hold(stack[i]); | |
640 | ||
645ca708 | 641 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
642 | |
643 | if (count) { | |
644 | flush_stack(stack, count, skb, count - 1); | |
645 | ||
646 | for (i = 0; i < count; i++) | |
647 | sock_put(stack[i]); | |
648 | } else { | |
649 | kfree_skb(skb); | |
650 | } | |
ba4e58ec | 651 | return 0; |
1da177e4 LT |
652 | } |
653 | ||
759e5d00 HX |
654 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
655 | int proto) | |
ba4e58ec | 656 | { |
759e5d00 HX |
657 | int err; |
658 | ||
659 | UDP_SKB_CB(skb)->partial_cov = 0; | |
660 | UDP_SKB_CB(skb)->cscov = skb->len; | |
661 | ||
db8dac20 | 662 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
663 | err = udplite_checksum_init(skb, uh); |
664 | if (err) | |
665 | return err; | |
666 | } | |
667 | ||
ba4e58ec GR |
668 | if (uh->check == 0) { |
669 | /* RFC 2460 section 8.1 says that we SHOULD log | |
670 | this error. Well, it is reasonable. | |
671 | */ | |
672 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
673 | return 1; | |
674 | } | |
675 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 676 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 677 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
678 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
679 | ||
60476372 | 680 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
681 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
682 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 683 | skb->len, proto, 0)); |
ba4e58ec | 684 | |
759e5d00 | 685 | return 0; |
ba4e58ec GR |
686 | } |
687 | ||
645ca708 | 688 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 689 | int proto) |
1da177e4 | 690 | { |
3ffe533c | 691 | struct net *net = dev_net(skb->dev); |
1da177e4 | 692 | struct sock *sk; |
1ab1457c | 693 | struct udphdr *uh; |
1da177e4 LT |
694 | struct in6_addr *saddr, *daddr; |
695 | u32 ulen = 0; | |
696 | ||
697 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
698 | goto short_packet; | |
699 | ||
0660e03f ACM |
700 | saddr = &ipv6_hdr(skb)->saddr; |
701 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 702 | uh = udp_hdr(skb); |
1da177e4 LT |
703 | |
704 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
705 | if (ulen > skb->len) |
706 | goto short_packet; | |
1da177e4 | 707 | |
759e5d00 HX |
708 | if (proto == IPPROTO_UDP) { |
709 | /* UDP validates ulen. */ | |
1da177e4 | 710 | |
ba4e58ec GR |
711 | /* Check for jumbo payload */ |
712 | if (ulen == 0) | |
713 | ulen = skb->len; | |
1da177e4 | 714 | |
ba4e58ec GR |
715 | if (ulen < sizeof(*uh)) |
716 | goto short_packet; | |
1da177e4 | 717 | |
ba4e58ec GR |
718 | if (ulen < skb->len) { |
719 | if (pskb_trim_rcsum(skb, ulen)) | |
720 | goto short_packet; | |
0660e03f ACM |
721 | saddr = &ipv6_hdr(skb)->saddr; |
722 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 723 | uh = udp_hdr(skb); |
ba4e58ec | 724 | } |
ba4e58ec | 725 | } |
1da177e4 | 726 | |
759e5d00 HX |
727 | if (udp6_csum_init(skb, uh, proto)) |
728 | goto discard; | |
729 | ||
1ab1457c YH |
730 | /* |
731 | * Multicast receive code | |
1da177e4 | 732 | */ |
ba4e58ec | 733 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
734 | return __udp6_lib_mcast_deliver(net, skb, |
735 | saddr, daddr, udptable); | |
1da177e4 LT |
736 | |
737 | /* Unicast */ | |
738 | ||
1ab1457c | 739 | /* |
1da177e4 LT |
740 | * check socket cache ... must talk to Alan about his plans |
741 | * for sock caches... i'll skip this for now. | |
742 | */ | |
607c4aaf | 743 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
744 | |
745 | if (sk == NULL) { | |
746 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
747 | goto discard; | |
748 | ||
ba4e58ec | 749 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 750 | goto discard; |
ef28d1a2 PE |
751 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
752 | proto == IPPROTO_UDPLITE); | |
1da177e4 | 753 | |
3ffe533c | 754 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
1da177e4 LT |
755 | |
756 | kfree_skb(skb); | |
add459aa | 757 | return 0; |
1da177e4 | 758 | } |
1ab1457c | 759 | |
1da177e4 | 760 | /* deliver */ |
1ab1457c | 761 | |
d97106ea | 762 | bh_lock_sock(sk); |
95766fff HA |
763 | if (!sock_owned_by_user(sk)) |
764 | udpv6_queue_rcv_skb(sk, skb); | |
a3a858ff | 765 | else if (sk_add_backlog(sk, skb)) { |
55349790 ZY |
766 | atomic_inc(&sk->sk_drops); |
767 | bh_unlock_sock(sk); | |
768 | sock_put(sk); | |
769 | goto discard; | |
770 | } | |
95766fff | 771 | bh_unlock_sock(sk); |
1da177e4 | 772 | sock_put(sk); |
add459aa | 773 | return 0; |
1da177e4 | 774 | |
1ab1457c | 775 | short_packet: |
ba4e58ec | 776 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 777 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 778 | ulen, skb->len); |
1da177e4 LT |
779 | |
780 | discard: | |
ef28d1a2 | 781 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 782 | kfree_skb(skb); |
add459aa | 783 | return 0; |
1da177e4 | 784 | } |
ba4e58ec | 785 | |
e5bbef20 | 786 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 787 | { |
645ca708 | 788 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
789 | } |
790 | ||
1da177e4 LT |
791 | /* |
792 | * Throw away all pending data and cancel the corking. Socket is locked. | |
793 | */ | |
794 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
795 | { | |
796 | struct udp_sock *up = udp_sk(sk); | |
797 | ||
36d926b9 DL |
798 | if (up->pending == AF_INET) |
799 | udp_flush_pending_frames(sk); | |
800 | else if (up->pending) { | |
1da177e4 LT |
801 | up->len = 0; |
802 | up->pending = 0; | |
803 | ip6_flush_pending_frames(sk); | |
1ab1457c | 804 | } |
1da177e4 LT |
805 | } |
806 | ||
493c6be3 SS |
807 | /** |
808 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
809 | * @sk: socket we are sending on | |
810 | * @skb: sk_buff containing the filled-in UDP header | |
811 | * (checksum field must be zeroed out) | |
812 | */ | |
813 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
814 | const struct in6_addr *saddr, | |
815 | const struct in6_addr *daddr, int len) | |
816 | { | |
817 | unsigned int offset; | |
818 | struct udphdr *uh = udp_hdr(skb); | |
819 | __wsum csum = 0; | |
820 | ||
821 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
822 | /* Only one fragment on the socket. */ | |
823 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
824 | skb->csum_offset = offsetof(struct udphdr, check); | |
825 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
826 | } else { | |
827 | /* | |
828 | * HW-checksum won't work as there are two or more | |
829 | * fragments on the socket so that all csums of sk_buffs | |
830 | * should be together | |
831 | */ | |
832 | offset = skb_transport_offset(skb); | |
833 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
834 | ||
835 | skb->ip_summed = CHECKSUM_NONE; | |
836 | ||
837 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
838 | csum = csum_add(csum, skb->csum); | |
839 | } | |
840 | ||
841 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
842 | csum); | |
843 | if (uh->check == 0) | |
844 | uh->check = CSUM_MANGLED_0; | |
845 | } | |
846 | } | |
847 | ||
1da177e4 LT |
848 | /* |
849 | * Sending | |
850 | */ | |
851 | ||
4c0a6cb0 | 852 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
853 | { |
854 | struct sk_buff *skb; | |
855 | struct udphdr *uh; | |
4c0a6cb0 | 856 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
857 | struct inet_sock *inet = inet_sk(sk); |
858 | struct flowi *fl = &inet->cork.fl; | |
859 | int err = 0; | |
b2bf1e26 | 860 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 861 | __wsum csum = 0; |
1da177e4 LT |
862 | |
863 | /* Grab the skbuff where UDP header space exists. */ | |
864 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
865 | goto out; | |
866 | ||
867 | /* | |
868 | * Create a UDP header | |
869 | */ | |
4bedb452 | 870 | uh = udp_hdr(skb); |
1da177e4 LT |
871 | uh->source = fl->fl_ip_sport; |
872 | uh->dest = fl->fl_ip_dport; | |
873 | uh->len = htons(up->len); | |
874 | uh->check = 0; | |
875 | ||
b2bf1e26 | 876 | if (is_udplite) |
ba4e58ec | 877 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 SS |
878 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
879 | udp6_hwcsum_outgoing(sk, skb, &fl->fl6_src, &fl->fl6_dst, | |
880 | up->len); | |
881 | goto send; | |
882 | } else | |
ba4e58ec | 883 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 884 | |
ba4e58ec GR |
885 | /* add protocol-dependent pseudo-header */ |
886 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
887 | up->len, fl->proto, csum ); | |
1da177e4 | 888 | if (uh->check == 0) |
f6ab0288 | 889 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 890 | |
493c6be3 | 891 | send: |
1da177e4 | 892 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
893 | if (err) { |
894 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
895 | UDP6_INC_STATS_USER(sock_net(sk), | |
896 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
897 | err = 0; | |
898 | } | |
899 | } else | |
900 | UDP6_INC_STATS_USER(sock_net(sk), | |
901 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
902 | out: |
903 | up->len = 0; | |
904 | up->pending = 0; | |
905 | return err; | |
906 | } | |
907 | ||
ba4e58ec | 908 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
909 | struct msghdr *msg, size_t len) |
910 | { | |
911 | struct ipv6_txoptions opt_space; | |
912 | struct udp_sock *up = udp_sk(sk); | |
913 | struct inet_sock *inet = inet_sk(sk); | |
914 | struct ipv6_pinfo *np = inet6_sk(sk); | |
915 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
916 | struct in6_addr *daddr, *final_p = NULL, final; | |
917 | struct ipv6_txoptions *opt = NULL; | |
918 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 919 | struct flowi fl; |
1da177e4 LT |
920 | struct dst_entry *dst; |
921 | int addr_len = msg->msg_namelen; | |
922 | int ulen = len; | |
923 | int hlimit = -1; | |
41a1f8ea | 924 | int tclass = -1; |
13b52cd4 | 925 | int dontfrag = -1; |
1da177e4 LT |
926 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
927 | int err; | |
987905de | 928 | int connected = 0; |
b2bf1e26 | 929 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 930 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
931 | |
932 | /* destination address check */ | |
933 | if (sin6) { | |
934 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
935 | return -EINVAL; | |
936 | ||
937 | switch (sin6->sin6_family) { | |
938 | case AF_INET6: | |
939 | if (addr_len < SIN6_LEN_RFC2133) | |
940 | return -EINVAL; | |
941 | daddr = &sin6->sin6_addr; | |
942 | break; | |
943 | case AF_INET: | |
944 | goto do_udp_sendmsg; | |
945 | case AF_UNSPEC: | |
946 | msg->msg_name = sin6 = NULL; | |
947 | msg->msg_namelen = addr_len = 0; | |
948 | daddr = NULL; | |
949 | break; | |
950 | default: | |
951 | return -EINVAL; | |
952 | } | |
953 | } else if (!up->pending) { | |
954 | if (sk->sk_state != TCP_ESTABLISHED) | |
955 | return -EDESTADDRREQ; | |
956 | daddr = &np->daddr; | |
1ab1457c | 957 | } else |
1da177e4 LT |
958 | daddr = NULL; |
959 | ||
960 | if (daddr) { | |
e773e4fa | 961 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
962 | struct sockaddr_in sin; |
963 | sin.sin_family = AF_INET; | |
c720c7e8 | 964 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
965 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
966 | msg->msg_name = &sin; | |
967 | msg->msg_namelen = sizeof(sin); | |
968 | do_udp_sendmsg: | |
969 | if (__ipv6_only_sock(sk)) | |
970 | return -ENETUNREACH; | |
971 | return udp_sendmsg(iocb, sk, msg, len); | |
972 | } | |
973 | } | |
974 | ||
975 | if (up->pending == AF_INET) | |
976 | return udp_sendmsg(iocb, sk, msg, len); | |
977 | ||
978 | /* Rough check on arithmetic overflow, | |
b59e139b | 979 | better check is made in ip6_append_data(). |
1da177e4 LT |
980 | */ |
981 | if (len > INT_MAX - sizeof(struct udphdr)) | |
982 | return -EMSGSIZE; | |
1ab1457c | 983 | |
1da177e4 LT |
984 | if (up->pending) { |
985 | /* | |
986 | * There are pending frames. | |
987 | * The socket lock must be held while it's corked. | |
988 | */ | |
989 | lock_sock(sk); | |
990 | if (likely(up->pending)) { | |
991 | if (unlikely(up->pending != AF_INET6)) { | |
992 | release_sock(sk); | |
993 | return -EAFNOSUPPORT; | |
994 | } | |
995 | dst = NULL; | |
996 | goto do_append_data; | |
997 | } | |
998 | release_sock(sk); | |
999 | } | |
1000 | ulen += sizeof(struct udphdr); | |
1001 | ||
132a55f3 | 1002 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
1003 | |
1004 | if (sin6) { | |
1005 | if (sin6->sin6_port == 0) | |
1006 | return -EINVAL; | |
1007 | ||
132a55f3 | 1008 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
1009 | daddr = &sin6->sin6_addr; |
1010 | ||
1011 | if (np->sndflow) { | |
132a55f3 HX |
1012 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1013 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
1014 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1015 | if (flowlabel == NULL) |
1016 | return -EINVAL; | |
1017 | daddr = &flowlabel->dst; | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * Otherwise it will be difficult to maintain | |
1023 | * sk->sk_dst_cache. | |
1024 | */ | |
1025 | if (sk->sk_state == TCP_ESTABLISHED && | |
1026 | ipv6_addr_equal(daddr, &np->daddr)) | |
1027 | daddr = &np->daddr; | |
1028 | ||
1029 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1030 | sin6->sin6_scope_id && | |
1031 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 1032 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
1033 | } else { |
1034 | if (sk->sk_state != TCP_ESTABLISHED) | |
1035 | return -EDESTADDRREQ; | |
1036 | ||
c720c7e8 | 1037 | fl.fl_ip_dport = inet->inet_dport; |
1da177e4 | 1038 | daddr = &np->daddr; |
132a55f3 | 1039 | fl.fl6_flowlabel = np->flow_label; |
987905de | 1040 | connected = 1; |
1da177e4 LT |
1041 | } |
1042 | ||
132a55f3 HX |
1043 | if (!fl.oif) |
1044 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 | 1045 | |
9f690db7 YH |
1046 | if (!fl.oif) |
1047 | fl.oif = np->sticky_pktinfo.ipi6_ifindex; | |
1048 | ||
51953d5b BH |
1049 | fl.mark = sk->sk_mark; |
1050 | ||
1da177e4 LT |
1051 | if (msg->msg_controllen) { |
1052 | opt = &opt_space; | |
1053 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1054 | opt->tot_len = sizeof(*opt); | |
1055 | ||
13b52cd4 BH |
1056 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, |
1057 | &tclass, &dontfrag); | |
1da177e4 LT |
1058 | if (err < 0) { |
1059 | fl6_sock_release(flowlabel); | |
1060 | return err; | |
1061 | } | |
132a55f3 HX |
1062 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1063 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1064 | if (flowlabel == NULL) |
1065 | return -EINVAL; | |
1066 | } | |
1067 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1068 | opt = NULL; | |
987905de | 1069 | connected = 0; |
1da177e4 LT |
1070 | } |
1071 | if (opt == NULL) | |
1072 | opt = np->opt; | |
df9890c3 YH |
1073 | if (flowlabel) |
1074 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1075 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1076 | |
ba4e58ec | 1077 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
1078 | if (!ipv6_addr_any(daddr)) |
1079 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
1080 | else | |
1081 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
1082 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
1083 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
c720c7e8 | 1084 | fl.fl_ip_sport = inet->inet_sport; |
1ab1457c | 1085 | |
1da177e4 LT |
1086 | /* merge ip6_build_xmit from ip6_output */ |
1087 | if (opt && opt->srcrt) { | |
1088 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
1089 | ipv6_addr_copy(&final, &fl.fl6_dst); |
1090 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 1091 | final_p = &final; |
987905de | 1092 | connected = 0; |
1da177e4 LT |
1093 | } |
1094 | ||
132a55f3 HX |
1095 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
1096 | fl.oif = np->mcast_oif; | |
987905de MK |
1097 | connected = 0; |
1098 | } | |
1da177e4 | 1099 | |
132a55f3 | 1100 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 1101 | |
132a55f3 | 1102 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
1103 | if (err) |
1104 | goto out; | |
1105 | if (final_p) | |
132a55f3 | 1106 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 1107 | |
52479b62 AD |
1108 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
1109 | if (err < 0) { | |
14e50e57 DM |
1110 | if (err == -EREMOTE) |
1111 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
1112 | if (err < 0) | |
1113 | goto out; | |
1114 | } | |
1da177e4 LT |
1115 | |
1116 | if (hlimit < 0) { | |
132a55f3 | 1117 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
1118 | hlimit = np->mcast_hops; |
1119 | else | |
1120 | hlimit = np->hop_limit; | |
1121 | if (hlimit < 0) | |
6b75d090 | 1122 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1123 | } |
1124 | ||
e651f03a | 1125 | if (tclass < 0) |
41a1f8ea | 1126 | tclass = np->tclass; |
41a1f8ea | 1127 | |
13b52cd4 BH |
1128 | if (dontfrag < 0) |
1129 | dontfrag = np->dontfrag; | |
1130 | ||
1da177e4 LT |
1131 | if (msg->msg_flags&MSG_CONFIRM) |
1132 | goto do_confirm; | |
1133 | back_from_confirm: | |
1134 | ||
1135 | lock_sock(sk); | |
1136 | if (unlikely(up->pending)) { | |
1137 | /* The socket is already corked while preparing it. */ | |
1138 | /* ... which is an evident application bug. --ANK */ | |
1139 | release_sock(sk); | |
1140 | ||
64ce2073 | 1141 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1142 | err = -EINVAL; |
1143 | goto out; | |
1144 | } | |
1145 | ||
1146 | up->pending = AF_INET6; | |
1147 | ||
1148 | do_append_data: | |
1149 | up->len += ulen; | |
ba4e58ec GR |
1150 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1151 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 1152 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea | 1153 | (struct rt6_info*)dst, |
13b52cd4 | 1154 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1155 | if (err) |
1156 | udp_v6_flush_pending_frames(sk); | |
1157 | else if (!corkreq) | |
4c0a6cb0 | 1158 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1159 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1160 | up->pending = 0; | |
1da177e4 | 1161 | |
a5e7c210 DM |
1162 | if (dst) { |
1163 | if (connected) { | |
1164 | ip6_dst_store(sk, dst, | |
132a55f3 | 1165 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
1166 | &np->daddr : NULL, |
1167 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 1168 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
1169 | &np->saddr : |
1170 | #endif | |
1171 | NULL); | |
a5e7c210 DM |
1172 | } else { |
1173 | dst_release(dst); | |
1174 | } | |
a3c96089 | 1175 | dst = NULL; |
a5e7c210 DM |
1176 | } |
1177 | ||
1da177e4 LT |
1178 | if (err > 0) |
1179 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1180 | release_sock(sk); | |
1181 | out: | |
a3c96089 | 1182 | dst_release(dst); |
1da177e4 | 1183 | fl6_sock_release(flowlabel); |
cd562c98 | 1184 | if (!err) |
1da177e4 | 1185 | return len; |
a18135eb DM |
1186 | /* |
1187 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1188 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1189 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1190 | * things). We could add another new stat but at least for now that | |
1191 | * seems like overkill. | |
1192 | */ | |
1193 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1194 | UDP6_INC_STATS_USER(sock_net(sk), |
1195 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1196 | } |
1da177e4 LT |
1197 | return err; |
1198 | ||
1199 | do_confirm: | |
1200 | dst_confirm(dst); | |
1201 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1202 | goto back_from_confirm; | |
1203 | err = 0; | |
1204 | goto out; | |
1205 | } | |
1206 | ||
7d06b2e0 | 1207 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
1208 | { |
1209 | lock_sock(sk); | |
1210 | udp_v6_flush_pending_frames(sk); | |
1211 | release_sock(sk); | |
1212 | ||
1213 | inet6_destroy_sock(sk); | |
1da177e4 LT |
1214 | } |
1215 | ||
1216 | /* | |
1217 | * Socket option code for UDP | |
1218 | */ | |
ba4e58ec | 1219 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1220 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1221 | { |
db8dac20 | 1222 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1223 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1224 | udp_v6_push_pending_frames); | |
ba4e58ec | 1225 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1226 | } |
1227 | ||
1228 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1229 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1230 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1231 | { |
db8dac20 | 1232 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1233 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1234 | udp_v6_push_pending_frames); | |
ba4e58ec | 1235 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1236 | } |
1237 | #endif | |
1238 | ||
ba4e58ec GR |
1239 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1240 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1241 | { |
db8dac20 | 1242 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1243 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1244 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1245 | } |
1246 | ||
1247 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1248 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1249 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1250 | { |
db8dac20 | 1251 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1252 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1253 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1254 | } |
1255 | #endif | |
1256 | ||
ba735425 SS |
1257 | static int udp6_ufo_send_check(struct sk_buff *skb) |
1258 | { | |
1259 | struct ipv6hdr *ipv6h; | |
1260 | struct udphdr *uh; | |
1261 | ||
1262 | if (!pskb_may_pull(skb, sizeof(*uh))) | |
1263 | return -EINVAL; | |
1264 | ||
1265 | ipv6h = ipv6_hdr(skb); | |
1266 | uh = udp_hdr(skb); | |
1267 | ||
1268 | uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, | |
1269 | IPPROTO_UDP, 0); | |
1270 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
1271 | skb->csum_offset = offsetof(struct udphdr, check); | |
1272 | skb->ip_summed = CHECKSUM_PARTIAL; | |
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features) | |
1277 | { | |
1278 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
1279 | unsigned int mss; | |
1280 | unsigned int unfrag_ip6hlen, unfrag_len; | |
1281 | struct frag_hdr *fptr; | |
1282 | u8 *mac_start, *prevhdr; | |
1283 | u8 nexthdr; | |
1284 | u8 frag_hdr_sz = sizeof(struct frag_hdr); | |
1285 | int offset; | |
1286 | __wsum csum; | |
1287 | ||
1288 | mss = skb_shinfo(skb)->gso_size; | |
1289 | if (unlikely(skb->len <= mss)) | |
1290 | goto out; | |
1291 | ||
1292 | if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { | |
1293 | /* Packet is from an untrusted source, reset gso_segs. */ | |
1294 | int type = skb_shinfo(skb)->gso_type; | |
1295 | ||
1296 | if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || | |
1297 | !(type & (SKB_GSO_UDP)))) | |
1298 | goto out; | |
1299 | ||
1300 | skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); | |
1301 | ||
1302 | segs = NULL; | |
1303 | goto out; | |
1304 | } | |
1305 | ||
1306 | /* Do software UFO. Complete and fill in the UDP checksum as HW cannot | |
1307 | * do checksum of UDP packets sent as multiple IP fragments. | |
1308 | */ | |
1309 | offset = skb->csum_start - skb_headroom(skb); | |
1310 | csum = skb_checksum(skb, offset, skb->len- offset, 0); | |
1311 | offset += skb->csum_offset; | |
1312 | *(__sum16 *)(skb->data + offset) = csum_fold(csum); | |
1313 | skb->ip_summed = CHECKSUM_NONE; | |
1314 | ||
1315 | /* Check if there is enough headroom to insert fragment header. */ | |
1316 | if ((skb_headroom(skb) < frag_hdr_sz) && | |
1317 | pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) | |
1318 | goto out; | |
1319 | ||
1320 | /* Find the unfragmentable header and shift it left by frag_hdr_sz | |
1321 | * bytes to insert fragment header. | |
1322 | */ | |
1323 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
1324 | nexthdr = *prevhdr; | |
1325 | *prevhdr = NEXTHDR_FRAGMENT; | |
1326 | unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + | |
1327 | unfrag_ip6hlen; | |
1328 | mac_start = skb_mac_header(skb); | |
1329 | memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); | |
1330 | ||
1331 | skb->mac_header -= frag_hdr_sz; | |
1332 | skb->network_header -= frag_hdr_sz; | |
1333 | ||
1334 | fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); | |
1335 | fptr->nexthdr = nexthdr; | |
1336 | fptr->reserved = 0; | |
1337 | ipv6_select_ident(fptr); | |
1338 | ||
1339 | /* Fragment the skb. ipv6 header and the remaining fields of the | |
1340 | * fragment header are updated in ipv6_gso_segment() | |
1341 | */ | |
1342 | segs = skb_segment(skb, features); | |
1343 | ||
1344 | out: | |
1345 | return segs; | |
1346 | } | |
1347 | ||
41135cc8 | 1348 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1349 | .handler = udpv6_rcv, |
1350 | .err_handler = udpv6_err, | |
ba735425 SS |
1351 | .gso_send_check = udp6_ufo_send_check, |
1352 | .gso_segment = udp6_ufo_fragment, | |
1da177e4 LT |
1353 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
1354 | }; | |
1355 | ||
1356 | /* ------------------------------------------------------------------------ */ | |
1357 | #ifdef CONFIG_PROC_FS | |
1358 | ||
1359 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1360 | { | |
1361 | struct inet_sock *inet = inet_sk(sp); | |
1362 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1363 | struct in6_addr *dest, *src; | |
1364 | __u16 destp, srcp; | |
1365 | ||
1366 | dest = &np->daddr; | |
1367 | src = &np->rcv_saddr; | |
c720c7e8 ED |
1368 | destp = ntohs(inet->inet_dport); |
1369 | srcp = ntohs(inet->inet_sport); | |
1da177e4 | 1370 | seq_printf(seq, |
f86dcc5a | 1371 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
cb61cb9b | 1372 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1373 | bucket, |
1374 | src->s6_addr32[0], src->s6_addr32[1], | |
1375 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1376 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1377 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1378 | sp->sk_state, |
31e6d363 ED |
1379 | sk_wmem_alloc_get(sp), |
1380 | sk_rmem_alloc_get(sp), | |
1da177e4 LT |
1381 | 0, 0L, 0, |
1382 | sock_i_uid(sp), 0, | |
1383 | sock_i_ino(sp), | |
cb61cb9b ED |
1384 | atomic_read(&sp->sk_refcnt), sp, |
1385 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1386 | } |
1387 | ||
ba4e58ec | 1388 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1389 | { |
1390 | if (v == SEQ_START_TOKEN) | |
1391 | seq_printf(seq, | |
1392 | " sl " | |
1393 | "local_address " | |
1394 | "remote_address " | |
1395 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1396 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1397 | else |
1398 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1399 | return 0; | |
1400 | } | |
1401 | ||
1da177e4 | 1402 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1403 | .name = "udp6", |
1404 | .family = AF_INET6, | |
645ca708 | 1405 | .udp_table = &udp_table, |
4ad96d39 DL |
1406 | .seq_fops = { |
1407 | .owner = THIS_MODULE, | |
1408 | }, | |
dda61925 DL |
1409 | .seq_ops = { |
1410 | .show = udp6_seq_show, | |
1411 | }, | |
1da177e4 LT |
1412 | }; |
1413 | ||
2c8c1e72 | 1414 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1415 | { |
0c96d8c5 | 1416 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1417 | } |
1418 | ||
0c96d8c5 DL |
1419 | void udp6_proc_exit(struct net *net) { |
1420 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1421 | } |
1422 | #endif /* CONFIG_PROC_FS */ | |
1423 | ||
1424 | /* ------------------------------------------------------------------------ */ | |
1425 | ||
1426 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1427 | .name = "UDPv6", |
1428 | .owner = THIS_MODULE, | |
ba4e58ec | 1429 | .close = udp_lib_close, |
543d9cfe ACM |
1430 | .connect = ip6_datagram_connect, |
1431 | .disconnect = udp_disconnect, | |
1432 | .ioctl = udp_ioctl, | |
1433 | .destroy = udpv6_destroy_sock, | |
1434 | .setsockopt = udpv6_setsockopt, | |
1435 | .getsockopt = udpv6_getsockopt, | |
1436 | .sendmsg = udpv6_sendmsg, | |
1437 | .recvmsg = udpv6_recvmsg, | |
1438 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1439 | .hash = udp_lib_hash, |
1440 | .unhash = udp_lib_unhash, | |
543d9cfe | 1441 | .get_port = udp_v6_get_port, |
95766fff HA |
1442 | .memory_allocated = &udp_memory_allocated, |
1443 | .sysctl_mem = sysctl_udp_mem, | |
1444 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1445 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1446 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1447 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1448 | .h.udp_table = &udp_table, |
3fdadf7d | 1449 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1450 | .compat_setsockopt = compat_udpv6_setsockopt, |
1451 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1452 | #endif |
1da177e4 LT |
1453 | }; |
1454 | ||
1da177e4 LT |
1455 | static struct inet_protosw udpv6_protosw = { |
1456 | .type = SOCK_DGRAM, | |
1457 | .protocol = IPPROTO_UDP, | |
1458 | .prot = &udpv6_prot, | |
1459 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1460 | .no_check = UDP_CSUM_DEFAULT, |
1461 | .flags = INET_PROTOSW_PERMANENT, | |
1462 | }; | |
1463 | ||
1464 | ||
7f4e4868 | 1465 | int __init udpv6_init(void) |
1da177e4 | 1466 | { |
7f4e4868 DL |
1467 | int ret; |
1468 | ||
1469 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1470 | if (ret) | |
1471 | goto out; | |
1472 | ||
1473 | ret = inet6_register_protosw(&udpv6_protosw); | |
1474 | if (ret) | |
1475 | goto out_udpv6_protocol; | |
1476 | out: | |
1477 | return ret; | |
1478 | ||
1479 | out_udpv6_protocol: | |
1480 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1481 | goto out; | |
1482 | } | |
1483 | ||
09f7709f | 1484 | void udpv6_exit(void) |
7f4e4868 DL |
1485 | { |
1486 | inet6_unregister_protosw(&udpv6_protosw); | |
1487 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1488 | } |