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Commit | Line | Data |
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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: | |
4b0b72f7 | 427 | lock_sock_bh(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 | } | |
4b0b72f7 | 436 | unlock_sock_bh(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 | |
f84af32c | 517 | if ((rc = ip_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) { |
c377411f ED |
587 | if (sk_rcvqueues_full(sk, skb)) { |
588 | kfree_skb(skb1); | |
589 | goto drop; | |
590 | } | |
a1ab77f9 ED |
591 | bh_lock_sock(sk); |
592 | if (!sock_owned_by_user(sk)) | |
593 | udpv6_queue_rcv_skb(sk, skb1); | |
a3a858ff | 594 | else if (sk_add_backlog(sk, skb1)) { |
55349790 ZY |
595 | kfree_skb(skb1); |
596 | bh_unlock_sock(sk); | |
597 | goto drop; | |
598 | } | |
a1ab77f9 | 599 | bh_unlock_sock(sk); |
55349790 | 600 | continue; |
a1ab77f9 | 601 | } |
55349790 ZY |
602 | drop: |
603 | atomic_inc(&sk->sk_drops); | |
604 | UDP6_INC_STATS_BH(sock_net(sk), | |
605 | UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); | |
606 | UDP6_INC_STATS_BH(sock_net(sk), | |
607 | UDP_MIB_INERRORS, IS_UDPLITE(sk)); | |
a1ab77f9 ED |
608 | } |
609 | } | |
1da177e4 LT |
610 | /* |
611 | * Note: called only from the BH handler context, | |
612 | * so we don't need to lock the hashes. | |
613 | */ | |
e3163493 PE |
614 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
615 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 616 | struct udp_table *udptable) |
1da177e4 | 617 | { |
a1ab77f9 | 618 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 619 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 620 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 621 | int dif; |
a1ab77f9 | 622 | unsigned int i, count = 0; |
1da177e4 | 623 | |
645ca708 | 624 | spin_lock(&hslot->lock); |
88ab1932 | 625 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 626 | dif = inet6_iif(skb); |
920a4611 | 627 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
628 | while (sk) { |
629 | stack[count++] = sk; | |
630 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
631 | uh->source, saddr, dif); | |
632 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
633 | if (!sk) | |
634 | break; | |
635 | flush_stack(stack, count, skb, ~0); | |
636 | count = 0; | |
95766fff | 637 | } |
1da177e4 | 638 | } |
a1ab77f9 ED |
639 | /* |
640 | * before releasing the lock, we must take reference on sockets | |
641 | */ | |
642 | for (i = 0; i < count; i++) | |
643 | sock_hold(stack[i]); | |
644 | ||
645ca708 | 645 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
646 | |
647 | if (count) { | |
648 | flush_stack(stack, count, skb, count - 1); | |
649 | ||
650 | for (i = 0; i < count; i++) | |
651 | sock_put(stack[i]); | |
652 | } else { | |
653 | kfree_skb(skb); | |
654 | } | |
ba4e58ec | 655 | return 0; |
1da177e4 LT |
656 | } |
657 | ||
759e5d00 HX |
658 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
659 | int proto) | |
ba4e58ec | 660 | { |
759e5d00 HX |
661 | int err; |
662 | ||
663 | UDP_SKB_CB(skb)->partial_cov = 0; | |
664 | UDP_SKB_CB(skb)->cscov = skb->len; | |
665 | ||
db8dac20 | 666 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
667 | err = udplite_checksum_init(skb, uh); |
668 | if (err) | |
669 | return err; | |
670 | } | |
671 | ||
ba4e58ec GR |
672 | if (uh->check == 0) { |
673 | /* RFC 2460 section 8.1 says that we SHOULD log | |
674 | this error. Well, it is reasonable. | |
675 | */ | |
676 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
677 | return 1; | |
678 | } | |
679 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 680 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 681 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
682 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
683 | ||
60476372 | 684 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
685 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
686 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 687 | skb->len, proto, 0)); |
ba4e58ec | 688 | |
759e5d00 | 689 | return 0; |
ba4e58ec GR |
690 | } |
691 | ||
645ca708 | 692 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 693 | int proto) |
1da177e4 | 694 | { |
3ffe533c | 695 | struct net *net = dev_net(skb->dev); |
1da177e4 | 696 | struct sock *sk; |
1ab1457c | 697 | struct udphdr *uh; |
1da177e4 LT |
698 | struct in6_addr *saddr, *daddr; |
699 | u32 ulen = 0; | |
700 | ||
701 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
702 | goto short_packet; | |
703 | ||
0660e03f ACM |
704 | saddr = &ipv6_hdr(skb)->saddr; |
705 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 706 | uh = udp_hdr(skb); |
1da177e4 LT |
707 | |
708 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
709 | if (ulen > skb->len) |
710 | goto short_packet; | |
1da177e4 | 711 | |
759e5d00 HX |
712 | if (proto == IPPROTO_UDP) { |
713 | /* UDP validates ulen. */ | |
1da177e4 | 714 | |
ba4e58ec GR |
715 | /* Check for jumbo payload */ |
716 | if (ulen == 0) | |
717 | ulen = skb->len; | |
1da177e4 | 718 | |
ba4e58ec GR |
719 | if (ulen < sizeof(*uh)) |
720 | goto short_packet; | |
1da177e4 | 721 | |
ba4e58ec GR |
722 | if (ulen < skb->len) { |
723 | if (pskb_trim_rcsum(skb, ulen)) | |
724 | goto short_packet; | |
0660e03f ACM |
725 | saddr = &ipv6_hdr(skb)->saddr; |
726 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 727 | uh = udp_hdr(skb); |
ba4e58ec | 728 | } |
ba4e58ec | 729 | } |
1da177e4 | 730 | |
759e5d00 HX |
731 | if (udp6_csum_init(skb, uh, proto)) |
732 | goto discard; | |
733 | ||
1ab1457c YH |
734 | /* |
735 | * Multicast receive code | |
1da177e4 | 736 | */ |
ba4e58ec | 737 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
738 | return __udp6_lib_mcast_deliver(net, skb, |
739 | saddr, daddr, udptable); | |
1da177e4 LT |
740 | |
741 | /* Unicast */ | |
742 | ||
1ab1457c | 743 | /* |
1da177e4 LT |
744 | * check socket cache ... must talk to Alan about his plans |
745 | * for sock caches... i'll skip this for now. | |
746 | */ | |
607c4aaf | 747 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
748 | |
749 | if (sk == NULL) { | |
750 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
751 | goto discard; | |
752 | ||
ba4e58ec | 753 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 754 | goto discard; |
ef28d1a2 PE |
755 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
756 | proto == IPPROTO_UDPLITE); | |
1da177e4 | 757 | |
3ffe533c | 758 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
1da177e4 LT |
759 | |
760 | kfree_skb(skb); | |
add459aa | 761 | return 0; |
1da177e4 | 762 | } |
1ab1457c | 763 | |
1da177e4 | 764 | /* deliver */ |
1ab1457c | 765 | |
c377411f ED |
766 | if (sk_rcvqueues_full(sk, skb)) { |
767 | sock_put(sk); | |
768 | goto discard; | |
769 | } | |
d97106ea | 770 | bh_lock_sock(sk); |
95766fff HA |
771 | if (!sock_owned_by_user(sk)) |
772 | udpv6_queue_rcv_skb(sk, skb); | |
a3a858ff | 773 | else if (sk_add_backlog(sk, skb)) { |
55349790 ZY |
774 | atomic_inc(&sk->sk_drops); |
775 | bh_unlock_sock(sk); | |
776 | sock_put(sk); | |
777 | goto discard; | |
778 | } | |
95766fff | 779 | bh_unlock_sock(sk); |
1da177e4 | 780 | sock_put(sk); |
add459aa | 781 | return 0; |
1da177e4 | 782 | |
1ab1457c | 783 | short_packet: |
ba4e58ec | 784 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
db8dac20 | 785 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
759e5d00 | 786 | ulen, skb->len); |
1da177e4 LT |
787 | |
788 | discard: | |
ef28d1a2 | 789 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 790 | kfree_skb(skb); |
add459aa | 791 | return 0; |
1da177e4 | 792 | } |
ba4e58ec | 793 | |
e5bbef20 | 794 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 795 | { |
645ca708 | 796 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
797 | } |
798 | ||
1da177e4 LT |
799 | /* |
800 | * Throw away all pending data and cancel the corking. Socket is locked. | |
801 | */ | |
802 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
803 | { | |
804 | struct udp_sock *up = udp_sk(sk); | |
805 | ||
36d926b9 DL |
806 | if (up->pending == AF_INET) |
807 | udp_flush_pending_frames(sk); | |
808 | else if (up->pending) { | |
1da177e4 LT |
809 | up->len = 0; |
810 | up->pending = 0; | |
811 | ip6_flush_pending_frames(sk); | |
1ab1457c | 812 | } |
1da177e4 LT |
813 | } |
814 | ||
493c6be3 SS |
815 | /** |
816 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
817 | * @sk: socket we are sending on | |
818 | * @skb: sk_buff containing the filled-in UDP header | |
819 | * (checksum field must be zeroed out) | |
820 | */ | |
821 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
822 | const struct in6_addr *saddr, | |
823 | const struct in6_addr *daddr, int len) | |
824 | { | |
825 | unsigned int offset; | |
826 | struct udphdr *uh = udp_hdr(skb); | |
827 | __wsum csum = 0; | |
828 | ||
829 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
830 | /* Only one fragment on the socket. */ | |
831 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
832 | skb->csum_offset = offsetof(struct udphdr, check); | |
833 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
834 | } else { | |
835 | /* | |
836 | * HW-checksum won't work as there are two or more | |
837 | * fragments on the socket so that all csums of sk_buffs | |
838 | * should be together | |
839 | */ | |
840 | offset = skb_transport_offset(skb); | |
841 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
842 | ||
843 | skb->ip_summed = CHECKSUM_NONE; | |
844 | ||
845 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
846 | csum = csum_add(csum, skb->csum); | |
847 | } | |
848 | ||
849 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
850 | csum); | |
851 | if (uh->check == 0) | |
852 | uh->check = CSUM_MANGLED_0; | |
853 | } | |
854 | } | |
855 | ||
1da177e4 LT |
856 | /* |
857 | * Sending | |
858 | */ | |
859 | ||
4c0a6cb0 | 860 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
861 | { |
862 | struct sk_buff *skb; | |
863 | struct udphdr *uh; | |
4c0a6cb0 | 864 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
865 | struct inet_sock *inet = inet_sk(sk); |
866 | struct flowi *fl = &inet->cork.fl; | |
867 | int err = 0; | |
b2bf1e26 | 868 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 869 | __wsum csum = 0; |
1da177e4 LT |
870 | |
871 | /* Grab the skbuff where UDP header space exists. */ | |
872 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
873 | goto out; | |
874 | ||
875 | /* | |
876 | * Create a UDP header | |
877 | */ | |
4bedb452 | 878 | uh = udp_hdr(skb); |
1da177e4 LT |
879 | uh->source = fl->fl_ip_sport; |
880 | uh->dest = fl->fl_ip_dport; | |
881 | uh->len = htons(up->len); | |
882 | uh->check = 0; | |
883 | ||
b2bf1e26 | 884 | if (is_udplite) |
ba4e58ec | 885 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 SS |
886 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
887 | udp6_hwcsum_outgoing(sk, skb, &fl->fl6_src, &fl->fl6_dst, | |
888 | up->len); | |
889 | goto send; | |
890 | } else | |
ba4e58ec | 891 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 892 | |
ba4e58ec GR |
893 | /* add protocol-dependent pseudo-header */ |
894 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
895 | up->len, fl->proto, csum ); | |
1da177e4 | 896 | if (uh->check == 0) |
f6ab0288 | 897 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 898 | |
493c6be3 | 899 | send: |
1da177e4 | 900 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
901 | if (err) { |
902 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
903 | UDP6_INC_STATS_USER(sock_net(sk), | |
904 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
905 | err = 0; | |
906 | } | |
907 | } else | |
908 | UDP6_INC_STATS_USER(sock_net(sk), | |
909 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
910 | out: |
911 | up->len = 0; | |
912 | up->pending = 0; | |
913 | return err; | |
914 | } | |
915 | ||
ba4e58ec | 916 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
917 | struct msghdr *msg, size_t len) |
918 | { | |
919 | struct ipv6_txoptions opt_space; | |
920 | struct udp_sock *up = udp_sk(sk); | |
921 | struct inet_sock *inet = inet_sk(sk); | |
922 | struct ipv6_pinfo *np = inet6_sk(sk); | |
923 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
924 | struct in6_addr *daddr, *final_p = NULL, final; | |
925 | struct ipv6_txoptions *opt = NULL; | |
926 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 927 | struct flowi fl; |
1da177e4 LT |
928 | struct dst_entry *dst; |
929 | int addr_len = msg->msg_namelen; | |
930 | int ulen = len; | |
931 | int hlimit = -1; | |
41a1f8ea | 932 | int tclass = -1; |
13b52cd4 | 933 | int dontfrag = -1; |
1da177e4 LT |
934 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
935 | int err; | |
987905de | 936 | int connected = 0; |
b2bf1e26 | 937 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 938 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
939 | |
940 | /* destination address check */ | |
941 | if (sin6) { | |
942 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
943 | return -EINVAL; | |
944 | ||
945 | switch (sin6->sin6_family) { | |
946 | case AF_INET6: | |
947 | if (addr_len < SIN6_LEN_RFC2133) | |
948 | return -EINVAL; | |
949 | daddr = &sin6->sin6_addr; | |
950 | break; | |
951 | case AF_INET: | |
952 | goto do_udp_sendmsg; | |
953 | case AF_UNSPEC: | |
954 | msg->msg_name = sin6 = NULL; | |
955 | msg->msg_namelen = addr_len = 0; | |
956 | daddr = NULL; | |
957 | break; | |
958 | default: | |
959 | return -EINVAL; | |
960 | } | |
961 | } else if (!up->pending) { | |
962 | if (sk->sk_state != TCP_ESTABLISHED) | |
963 | return -EDESTADDRREQ; | |
964 | daddr = &np->daddr; | |
1ab1457c | 965 | } else |
1da177e4 LT |
966 | daddr = NULL; |
967 | ||
968 | if (daddr) { | |
e773e4fa | 969 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
970 | struct sockaddr_in sin; |
971 | sin.sin_family = AF_INET; | |
c720c7e8 | 972 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
973 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
974 | msg->msg_name = &sin; | |
975 | msg->msg_namelen = sizeof(sin); | |
976 | do_udp_sendmsg: | |
977 | if (__ipv6_only_sock(sk)) | |
978 | return -ENETUNREACH; | |
979 | return udp_sendmsg(iocb, sk, msg, len); | |
980 | } | |
981 | } | |
982 | ||
983 | if (up->pending == AF_INET) | |
984 | return udp_sendmsg(iocb, sk, msg, len); | |
985 | ||
986 | /* Rough check on arithmetic overflow, | |
b59e139b | 987 | better check is made in ip6_append_data(). |
1da177e4 LT |
988 | */ |
989 | if (len > INT_MAX - sizeof(struct udphdr)) | |
990 | return -EMSGSIZE; | |
1ab1457c | 991 | |
1da177e4 LT |
992 | if (up->pending) { |
993 | /* | |
994 | * There are pending frames. | |
995 | * The socket lock must be held while it's corked. | |
996 | */ | |
997 | lock_sock(sk); | |
998 | if (likely(up->pending)) { | |
999 | if (unlikely(up->pending != AF_INET6)) { | |
1000 | release_sock(sk); | |
1001 | return -EAFNOSUPPORT; | |
1002 | } | |
1003 | dst = NULL; | |
1004 | goto do_append_data; | |
1005 | } | |
1006 | release_sock(sk); | |
1007 | } | |
1008 | ulen += sizeof(struct udphdr); | |
1009 | ||
132a55f3 | 1010 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
1011 | |
1012 | if (sin6) { | |
1013 | if (sin6->sin6_port == 0) | |
1014 | return -EINVAL; | |
1015 | ||
132a55f3 | 1016 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
1017 | daddr = &sin6->sin6_addr; |
1018 | ||
1019 | if (np->sndflow) { | |
132a55f3 HX |
1020 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1021 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
1022 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1023 | if (flowlabel == NULL) |
1024 | return -EINVAL; | |
1025 | daddr = &flowlabel->dst; | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Otherwise it will be difficult to maintain | |
1031 | * sk->sk_dst_cache. | |
1032 | */ | |
1033 | if (sk->sk_state == TCP_ESTABLISHED && | |
1034 | ipv6_addr_equal(daddr, &np->daddr)) | |
1035 | daddr = &np->daddr; | |
1036 | ||
1037 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1038 | sin6->sin6_scope_id && | |
1039 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 1040 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
1041 | } else { |
1042 | if (sk->sk_state != TCP_ESTABLISHED) | |
1043 | return -EDESTADDRREQ; | |
1044 | ||
c720c7e8 | 1045 | fl.fl_ip_dport = inet->inet_dport; |
1da177e4 | 1046 | daddr = &np->daddr; |
132a55f3 | 1047 | fl.fl6_flowlabel = np->flow_label; |
987905de | 1048 | connected = 1; |
1da177e4 LT |
1049 | } |
1050 | ||
132a55f3 HX |
1051 | if (!fl.oif) |
1052 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 | 1053 | |
9f690db7 YH |
1054 | if (!fl.oif) |
1055 | fl.oif = np->sticky_pktinfo.ipi6_ifindex; | |
1056 | ||
51953d5b BH |
1057 | fl.mark = sk->sk_mark; |
1058 | ||
1da177e4 LT |
1059 | if (msg->msg_controllen) { |
1060 | opt = &opt_space; | |
1061 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1062 | opt->tot_len = sizeof(*opt); | |
1063 | ||
13b52cd4 BH |
1064 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, |
1065 | &tclass, &dontfrag); | |
1da177e4 LT |
1066 | if (err < 0) { |
1067 | fl6_sock_release(flowlabel); | |
1068 | return err; | |
1069 | } | |
132a55f3 HX |
1070 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1071 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1072 | if (flowlabel == NULL) |
1073 | return -EINVAL; | |
1074 | } | |
1075 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1076 | opt = NULL; | |
987905de | 1077 | connected = 0; |
1da177e4 LT |
1078 | } |
1079 | if (opt == NULL) | |
1080 | opt = np->opt; | |
df9890c3 YH |
1081 | if (flowlabel) |
1082 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1083 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1084 | |
ba4e58ec | 1085 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
1086 | if (!ipv6_addr_any(daddr)) |
1087 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
1088 | else | |
1089 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
1090 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
1091 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
c720c7e8 | 1092 | fl.fl_ip_sport = inet->inet_sport; |
1ab1457c | 1093 | |
1da177e4 LT |
1094 | /* merge ip6_build_xmit from ip6_output */ |
1095 | if (opt && opt->srcrt) { | |
1096 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
1097 | ipv6_addr_copy(&final, &fl.fl6_dst); |
1098 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 1099 | final_p = &final; |
987905de | 1100 | connected = 0; |
1da177e4 LT |
1101 | } |
1102 | ||
132a55f3 HX |
1103 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
1104 | fl.oif = np->mcast_oif; | |
987905de MK |
1105 | connected = 0; |
1106 | } | |
1da177e4 | 1107 | |
132a55f3 | 1108 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 1109 | |
132a55f3 | 1110 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
1111 | if (err) |
1112 | goto out; | |
1113 | if (final_p) | |
132a55f3 | 1114 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 1115 | |
52479b62 AD |
1116 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
1117 | if (err < 0) { | |
14e50e57 DM |
1118 | if (err == -EREMOTE) |
1119 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
1120 | if (err < 0) | |
1121 | goto out; | |
1122 | } | |
1da177e4 LT |
1123 | |
1124 | if (hlimit < 0) { | |
132a55f3 | 1125 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
1126 | hlimit = np->mcast_hops; |
1127 | else | |
1128 | hlimit = np->hop_limit; | |
1129 | if (hlimit < 0) | |
6b75d090 | 1130 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1131 | } |
1132 | ||
e651f03a | 1133 | if (tclass < 0) |
41a1f8ea | 1134 | tclass = np->tclass; |
41a1f8ea | 1135 | |
13b52cd4 BH |
1136 | if (dontfrag < 0) |
1137 | dontfrag = np->dontfrag; | |
1138 | ||
1da177e4 LT |
1139 | if (msg->msg_flags&MSG_CONFIRM) |
1140 | goto do_confirm; | |
1141 | back_from_confirm: | |
1142 | ||
1143 | lock_sock(sk); | |
1144 | if (unlikely(up->pending)) { | |
1145 | /* The socket is already corked while preparing it. */ | |
1146 | /* ... which is an evident application bug. --ANK */ | |
1147 | release_sock(sk); | |
1148 | ||
64ce2073 | 1149 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1150 | err = -EINVAL; |
1151 | goto out; | |
1152 | } | |
1153 | ||
1154 | up->pending = AF_INET6; | |
1155 | ||
1156 | do_append_data: | |
1157 | up->len += ulen; | |
ba4e58ec GR |
1158 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1159 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 1160 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea | 1161 | (struct rt6_info*)dst, |
13b52cd4 | 1162 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1163 | if (err) |
1164 | udp_v6_flush_pending_frames(sk); | |
1165 | else if (!corkreq) | |
4c0a6cb0 | 1166 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1167 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1168 | up->pending = 0; | |
1da177e4 | 1169 | |
a5e7c210 DM |
1170 | if (dst) { |
1171 | if (connected) { | |
1172 | ip6_dst_store(sk, dst, | |
132a55f3 | 1173 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
1174 | &np->daddr : NULL, |
1175 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 1176 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
1177 | &np->saddr : |
1178 | #endif | |
1179 | NULL); | |
a5e7c210 DM |
1180 | } else { |
1181 | dst_release(dst); | |
1182 | } | |
a3c96089 | 1183 | dst = NULL; |
a5e7c210 DM |
1184 | } |
1185 | ||
1da177e4 LT |
1186 | if (err > 0) |
1187 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1188 | release_sock(sk); | |
1189 | out: | |
a3c96089 | 1190 | dst_release(dst); |
1da177e4 | 1191 | fl6_sock_release(flowlabel); |
cd562c98 | 1192 | if (!err) |
1da177e4 | 1193 | return len; |
a18135eb DM |
1194 | /* |
1195 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1196 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1197 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1198 | * things). We could add another new stat but at least for now that | |
1199 | * seems like overkill. | |
1200 | */ | |
1201 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1202 | UDP6_INC_STATS_USER(sock_net(sk), |
1203 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1204 | } |
1da177e4 LT |
1205 | return err; |
1206 | ||
1207 | do_confirm: | |
1208 | dst_confirm(dst); | |
1209 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1210 | goto back_from_confirm; | |
1211 | err = 0; | |
1212 | goto out; | |
1213 | } | |
1214 | ||
7d06b2e0 | 1215 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
1216 | { |
1217 | lock_sock(sk); | |
1218 | udp_v6_flush_pending_frames(sk); | |
1219 | release_sock(sk); | |
1220 | ||
1221 | inet6_destroy_sock(sk); | |
1da177e4 LT |
1222 | } |
1223 | ||
1224 | /* | |
1225 | * Socket option code for UDP | |
1226 | */ | |
ba4e58ec | 1227 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1228 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1229 | { |
db8dac20 | 1230 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1231 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1232 | udp_v6_push_pending_frames); | |
ba4e58ec | 1233 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1234 | } |
1235 | ||
1236 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1237 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1238 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1239 | { |
db8dac20 | 1240 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1241 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1242 | udp_v6_push_pending_frames); | |
ba4e58ec | 1243 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1244 | } |
1245 | #endif | |
1246 | ||
ba4e58ec GR |
1247 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1248 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1249 | { |
db8dac20 | 1250 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1251 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1252 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1253 | } |
1254 | ||
1255 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1256 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1257 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1258 | { |
db8dac20 | 1259 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1260 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1261 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1262 | } |
1263 | #endif | |
1264 | ||
ba735425 SS |
1265 | static int udp6_ufo_send_check(struct sk_buff *skb) |
1266 | { | |
1267 | struct ipv6hdr *ipv6h; | |
1268 | struct udphdr *uh; | |
1269 | ||
1270 | if (!pskb_may_pull(skb, sizeof(*uh))) | |
1271 | return -EINVAL; | |
1272 | ||
1273 | ipv6h = ipv6_hdr(skb); | |
1274 | uh = udp_hdr(skb); | |
1275 | ||
1276 | uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, | |
1277 | IPPROTO_UDP, 0); | |
1278 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
1279 | skb->csum_offset = offsetof(struct udphdr, check); | |
1280 | skb->ip_summed = CHECKSUM_PARTIAL; | |
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features) | |
1285 | { | |
1286 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
1287 | unsigned int mss; | |
1288 | unsigned int unfrag_ip6hlen, unfrag_len; | |
1289 | struct frag_hdr *fptr; | |
1290 | u8 *mac_start, *prevhdr; | |
1291 | u8 nexthdr; | |
1292 | u8 frag_hdr_sz = sizeof(struct frag_hdr); | |
1293 | int offset; | |
1294 | __wsum csum; | |
1295 | ||
1296 | mss = skb_shinfo(skb)->gso_size; | |
1297 | if (unlikely(skb->len <= mss)) | |
1298 | goto out; | |
1299 | ||
1300 | if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { | |
1301 | /* Packet is from an untrusted source, reset gso_segs. */ | |
1302 | int type = skb_shinfo(skb)->gso_type; | |
1303 | ||
1304 | if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || | |
1305 | !(type & (SKB_GSO_UDP)))) | |
1306 | goto out; | |
1307 | ||
1308 | skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); | |
1309 | ||
1310 | segs = NULL; | |
1311 | goto out; | |
1312 | } | |
1313 | ||
1314 | /* Do software UFO. Complete and fill in the UDP checksum as HW cannot | |
1315 | * do checksum of UDP packets sent as multiple IP fragments. | |
1316 | */ | |
1317 | offset = skb->csum_start - skb_headroom(skb); | |
1318 | csum = skb_checksum(skb, offset, skb->len- offset, 0); | |
1319 | offset += skb->csum_offset; | |
1320 | *(__sum16 *)(skb->data + offset) = csum_fold(csum); | |
1321 | skb->ip_summed = CHECKSUM_NONE; | |
1322 | ||
1323 | /* Check if there is enough headroom to insert fragment header. */ | |
1324 | if ((skb_headroom(skb) < frag_hdr_sz) && | |
1325 | pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) | |
1326 | goto out; | |
1327 | ||
1328 | /* Find the unfragmentable header and shift it left by frag_hdr_sz | |
1329 | * bytes to insert fragment header. | |
1330 | */ | |
1331 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
1332 | nexthdr = *prevhdr; | |
1333 | *prevhdr = NEXTHDR_FRAGMENT; | |
1334 | unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + | |
1335 | unfrag_ip6hlen; | |
1336 | mac_start = skb_mac_header(skb); | |
1337 | memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); | |
1338 | ||
1339 | skb->mac_header -= frag_hdr_sz; | |
1340 | skb->network_header -= frag_hdr_sz; | |
1341 | ||
1342 | fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); | |
1343 | fptr->nexthdr = nexthdr; | |
1344 | fptr->reserved = 0; | |
1345 | ipv6_select_ident(fptr); | |
1346 | ||
1347 | /* Fragment the skb. ipv6 header and the remaining fields of the | |
1348 | * fragment header are updated in ipv6_gso_segment() | |
1349 | */ | |
1350 | segs = skb_segment(skb, features); | |
1351 | ||
1352 | out: | |
1353 | return segs; | |
1354 | } | |
1355 | ||
41135cc8 | 1356 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1357 | .handler = udpv6_rcv, |
1358 | .err_handler = udpv6_err, | |
ba735425 SS |
1359 | .gso_send_check = udp6_ufo_send_check, |
1360 | .gso_segment = udp6_ufo_fragment, | |
1da177e4 LT |
1361 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
1362 | }; | |
1363 | ||
1364 | /* ------------------------------------------------------------------------ */ | |
1365 | #ifdef CONFIG_PROC_FS | |
1366 | ||
1367 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1368 | { | |
1369 | struct inet_sock *inet = inet_sk(sp); | |
1370 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1371 | struct in6_addr *dest, *src; | |
1372 | __u16 destp, srcp; | |
1373 | ||
1374 | dest = &np->daddr; | |
1375 | src = &np->rcv_saddr; | |
c720c7e8 ED |
1376 | destp = ntohs(inet->inet_dport); |
1377 | srcp = ntohs(inet->inet_sport); | |
1da177e4 | 1378 | seq_printf(seq, |
f86dcc5a | 1379 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
cb61cb9b | 1380 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1381 | bucket, |
1382 | src->s6_addr32[0], src->s6_addr32[1], | |
1383 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1384 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1385 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1386 | sp->sk_state, |
31e6d363 ED |
1387 | sk_wmem_alloc_get(sp), |
1388 | sk_rmem_alloc_get(sp), | |
1da177e4 LT |
1389 | 0, 0L, 0, |
1390 | sock_i_uid(sp), 0, | |
1391 | sock_i_ino(sp), | |
cb61cb9b ED |
1392 | atomic_read(&sp->sk_refcnt), sp, |
1393 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1394 | } |
1395 | ||
ba4e58ec | 1396 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1397 | { |
1398 | if (v == SEQ_START_TOKEN) | |
1399 | seq_printf(seq, | |
1400 | " sl " | |
1401 | "local_address " | |
1402 | "remote_address " | |
1403 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1404 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1405 | else |
1406 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1407 | return 0; | |
1408 | } | |
1409 | ||
1da177e4 | 1410 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1411 | .name = "udp6", |
1412 | .family = AF_INET6, | |
645ca708 | 1413 | .udp_table = &udp_table, |
4ad96d39 DL |
1414 | .seq_fops = { |
1415 | .owner = THIS_MODULE, | |
1416 | }, | |
dda61925 DL |
1417 | .seq_ops = { |
1418 | .show = udp6_seq_show, | |
1419 | }, | |
1da177e4 LT |
1420 | }; |
1421 | ||
2c8c1e72 | 1422 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1423 | { |
0c96d8c5 | 1424 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1425 | } |
1426 | ||
0c96d8c5 DL |
1427 | void udp6_proc_exit(struct net *net) { |
1428 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1429 | } |
1430 | #endif /* CONFIG_PROC_FS */ | |
1431 | ||
1432 | /* ------------------------------------------------------------------------ */ | |
1433 | ||
1434 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1435 | .name = "UDPv6", |
1436 | .owner = THIS_MODULE, | |
ba4e58ec | 1437 | .close = udp_lib_close, |
543d9cfe ACM |
1438 | .connect = ip6_datagram_connect, |
1439 | .disconnect = udp_disconnect, | |
1440 | .ioctl = udp_ioctl, | |
1441 | .destroy = udpv6_destroy_sock, | |
1442 | .setsockopt = udpv6_setsockopt, | |
1443 | .getsockopt = udpv6_getsockopt, | |
1444 | .sendmsg = udpv6_sendmsg, | |
1445 | .recvmsg = udpv6_recvmsg, | |
1446 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1447 | .hash = udp_lib_hash, |
1448 | .unhash = udp_lib_unhash, | |
543d9cfe | 1449 | .get_port = udp_v6_get_port, |
95766fff HA |
1450 | .memory_allocated = &udp_memory_allocated, |
1451 | .sysctl_mem = sysctl_udp_mem, | |
1452 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1453 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1454 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1455 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1456 | .h.udp_table = &udp_table, |
3fdadf7d | 1457 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1458 | .compat_setsockopt = compat_udpv6_setsockopt, |
1459 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1460 | #endif |
1da177e4 LT |
1461 | }; |
1462 | ||
1da177e4 LT |
1463 | static struct inet_protosw udpv6_protosw = { |
1464 | .type = SOCK_DGRAM, | |
1465 | .protocol = IPPROTO_UDP, | |
1466 | .prot = &udpv6_prot, | |
1467 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1468 | .no_check = UDP_CSUM_DEFAULT, |
1469 | .flags = INET_PROTOSW_PERMANENT, | |
1470 | }; | |
1471 | ||
1472 | ||
7f4e4868 | 1473 | int __init udpv6_init(void) |
1da177e4 | 1474 | { |
7f4e4868 DL |
1475 | int ret; |
1476 | ||
1477 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1478 | if (ret) | |
1479 | goto out; | |
1480 | ||
1481 | ret = inet6_register_protosw(&udpv6_protosw); | |
1482 | if (ret) | |
1483 | goto out_udpv6_protocol; | |
1484 | out: | |
1485 | return ret; | |
1486 | ||
1487 | out_udpv6_protocol: | |
1488 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1489 | goto out; | |
1490 | } | |
1491 | ||
09f7709f | 1492 | void udpv6_exit(void) |
7f4e4868 DL |
1493 | { |
1494 | inet6_unregister_protosw(&udpv6_protosw); | |
1495 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1496 | } |