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 | ||
719f8358 ED |
114 | static void udp_v6_rehash(struct sock *sk) |
115 | { | |
116 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), | |
117 | &inet6_sk(sk)->rcv_saddr, | |
118 | inet_sk(sk)->inet_num); | |
119 | ||
120 | udp_lib_rehash(sk, new_hash); | |
121 | } | |
122 | ||
645ca708 ED |
123 | static inline int compute_score(struct sock *sk, struct net *net, |
124 | unsigned short hnum, | |
125 | struct in6_addr *saddr, __be16 sport, | |
126 | struct in6_addr *daddr, __be16 dport, | |
127 | int dif) | |
128 | { | |
129 | int score = -1; | |
130 | ||
d4cada4a | 131 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
645ca708 ED |
132 | sk->sk_family == PF_INET6) { |
133 | struct ipv6_pinfo *np = inet6_sk(sk); | |
134 | struct inet_sock *inet = inet_sk(sk); | |
135 | ||
136 | score = 0; | |
c720c7e8 ED |
137 | if (inet->inet_dport) { |
138 | if (inet->inet_dport != sport) | |
645ca708 ED |
139 | return -1; |
140 | score++; | |
141 | } | |
142 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
143 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
144 | return -1; | |
145 | score++; | |
146 | } | |
147 | if (!ipv6_addr_any(&np->daddr)) { | |
148 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
149 | return -1; | |
150 | score++; | |
151 | } | |
152 | if (sk->sk_bound_dev_if) { | |
153 | if (sk->sk_bound_dev_if != dif) | |
154 | return -1; | |
155 | score++; | |
156 | } | |
157 | } | |
158 | return score; | |
159 | } | |
160 | ||
fddc17de ED |
161 | #define SCORE2_MAX (1 + 1 + 1) |
162 | static inline int compute_score2(struct sock *sk, struct net *net, | |
163 | const struct in6_addr *saddr, __be16 sport, | |
164 | const struct in6_addr *daddr, unsigned short hnum, | |
165 | int dif) | |
166 | { | |
167 | int score = -1; | |
168 | ||
169 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && | |
170 | sk->sk_family == PF_INET6) { | |
171 | struct ipv6_pinfo *np = inet6_sk(sk); | |
172 | struct inet_sock *inet = inet_sk(sk); | |
173 | ||
174 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
175 | return -1; | |
176 | score = 0; | |
177 | if (inet->inet_dport) { | |
178 | if (inet->inet_dport != sport) | |
179 | return -1; | |
180 | score++; | |
181 | } | |
182 | if (!ipv6_addr_any(&np->daddr)) { | |
183 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
184 | return -1; | |
185 | score++; | |
186 | } | |
187 | if (sk->sk_bound_dev_if) { | |
188 | if (sk->sk_bound_dev_if != dif) | |
189 | return -1; | |
190 | score++; | |
191 | } | |
192 | } | |
193 | return score; | |
194 | } | |
195 | ||
fddc17de ED |
196 | |
197 | /* called with read_rcu_lock() */ | |
198 | static struct sock *udp6_lib_lookup2(struct net *net, | |
199 | const struct in6_addr *saddr, __be16 sport, | |
200 | const struct in6_addr *daddr, unsigned int hnum, int dif, | |
201 | struct udp_hslot *hslot2, unsigned int slot2) | |
202 | { | |
203 | struct sock *sk, *result; | |
204 | struct hlist_nulls_node *node; | |
205 | int score, badness; | |
206 | ||
207 | begin: | |
208 | result = NULL; | |
209 | badness = -1; | |
210 | udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { | |
211 | score = compute_score2(sk, net, saddr, sport, | |
212 | daddr, hnum, dif); | |
213 | if (score > badness) { | |
214 | result = sk; | |
215 | badness = score; | |
216 | if (score == SCORE2_MAX) | |
217 | goto exact_match; | |
218 | } | |
219 | } | |
220 | /* | |
221 | * if the nulls value we got at the end of this lookup is | |
222 | * not the expected one, we must restart lookup. | |
223 | * We probably met an item that was moved to another chain. | |
224 | */ | |
225 | if (get_nulls_value(node) != slot2) | |
226 | goto begin; | |
227 | ||
228 | if (result) { | |
229 | exact_match: | |
230 | if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) | |
231 | result = NULL; | |
232 | else if (unlikely(compute_score2(result, net, saddr, sport, | |
233 | daddr, hnum, dif) < badness)) { | |
234 | sock_put(result); | |
235 | goto begin; | |
236 | } | |
237 | } | |
238 | return result; | |
239 | } | |
240 | ||
fa4d3c62 PE |
241 | static struct sock *__udp6_lib_lookup(struct net *net, |
242 | struct in6_addr *saddr, __be16 sport, | |
ba4e58ec | 243 | struct in6_addr *daddr, __be16 dport, |
645ca708 | 244 | int dif, struct udp_table *udptable) |
1da177e4 | 245 | { |
271b72c7 | 246 | struct sock *sk, *result; |
88ab1932 | 247 | struct hlist_nulls_node *node; |
1da177e4 | 248 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
249 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
250 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
271b72c7 | 251 | int score, badness; |
645ca708 | 252 | |
271b72c7 | 253 | rcu_read_lock(); |
fddc17de ED |
254 | if (hslot->count > 10) { |
255 | hash2 = udp6_portaddr_hash(net, daddr, hnum); | |
256 | slot2 = hash2 & udptable->mask; | |
257 | hslot2 = &udptable->hash2[slot2]; | |
258 | if (hslot->count < hslot2->count) | |
259 | goto begin; | |
260 | ||
261 | result = udp6_lib_lookup2(net, saddr, sport, | |
262 | daddr, hnum, dif, | |
263 | hslot2, slot2); | |
264 | if (!result) { | |
265 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); | |
266 | slot2 = hash2 & udptable->mask; | |
267 | hslot2 = &udptable->hash2[slot2]; | |
268 | if (hslot->count < hslot2->count) | |
269 | goto begin; | |
270 | ||
1223c67c JBD |
271 | result = udp6_lib_lookup2(net, saddr, sport, |
272 | &in6addr_any, hnum, dif, | |
fddc17de ED |
273 | hslot2, slot2); |
274 | } | |
275 | rcu_read_unlock(); | |
276 | return result; | |
277 | } | |
271b72c7 ED |
278 | begin: |
279 | result = NULL; | |
280 | badness = -1; | |
88ab1932 | 281 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
282 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
283 | if (score > badness) { | |
284 | result = sk; | |
285 | badness = score; | |
1da177e4 LT |
286 | } |
287 | } | |
88ab1932 ED |
288 | /* |
289 | * if the nulls value we got at the end of this lookup is | |
290 | * not the expected one, we must restart lookup. | |
291 | * We probably met an item that was moved to another chain. | |
292 | */ | |
fddc17de | 293 | if (get_nulls_value(node) != slot) |
88ab1932 ED |
294 | goto begin; |
295 | ||
271b72c7 ED |
296 | if (result) { |
297 | if (unlikely(!atomic_inc_not_zero(&result->sk_refcnt))) | |
298 | result = NULL; | |
299 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
300 | daddr, dport, dif) < badness)) { | |
301 | sock_put(result); | |
302 | goto begin; | |
303 | } | |
304 | } | |
305 | rcu_read_unlock(); | |
1da177e4 LT |
306 | return result; |
307 | } | |
308 | ||
607c4aaf KK |
309 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
310 | __be16 sport, __be16 dport, | |
645ca708 | 311 | struct udp_table *udptable) |
607c4aaf | 312 | { |
23542618 | 313 | struct sock *sk; |
607c4aaf KK |
314 | struct ipv6hdr *iph = ipv6_hdr(skb); |
315 | ||
23542618 KK |
316 | if (unlikely(sk = skb_steal_sock(skb))) |
317 | return sk; | |
adf30907 ED |
318 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
319 | &iph->daddr, dport, inet6_iif(skb), | |
320 | udptable); | |
607c4aaf KK |
321 | } |
322 | ||
1da177e4 LT |
323 | /* |
324 | * This should be easy, if there is something there we | |
325 | * return it, otherwise we block. | |
326 | */ | |
327 | ||
ba4e58ec | 328 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
329 | struct msghdr *msg, size_t len, |
330 | int noblock, int flags, int *addr_len) | |
331 | { | |
332 | struct ipv6_pinfo *np = inet6_sk(sk); | |
333 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 334 | struct sk_buff *skb; |
81d54ec8 | 335 | unsigned int ulen; |
a59322be | 336 | int peeked; |
759e5d00 HX |
337 | int err; |
338 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 339 | int is_udp4; |
8a74ad60 | 340 | bool slow; |
1da177e4 | 341 | |
1ab1457c YH |
342 | if (addr_len) |
343 | *addr_len=sizeof(struct sockaddr_in6); | |
344 | ||
1da177e4 LT |
345 | if (flags & MSG_ERRQUEUE) |
346 | return ipv6_recv_error(sk, msg, len); | |
347 | ||
4b340ae2 BH |
348 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
349 | return ipv6_recv_rxpmtu(sk, msg, len); | |
350 | ||
1da177e4 | 351 | try_again: |
a59322be HX |
352 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
353 | &peeked, &err); | |
1da177e4 LT |
354 | if (!skb) |
355 | goto out; | |
356 | ||
759e5d00 | 357 | ulen = skb->len - sizeof(struct udphdr); |
81d54ec8 GR |
358 | if (len > ulen) |
359 | len = ulen; | |
360 | else if (len < ulen) | |
1ab1457c | 361 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 362 | |
f26ba175 WY |
363 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
364 | ||
ba4e58ec | 365 | /* |
759e5d00 HX |
366 | * If checksum is needed at all, try to do it while copying the |
367 | * data. If the data is truncated, or if we only want a partial | |
368 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 369 | */ |
ba4e58ec | 370 | |
81d54ec8 | 371 | if (len < ulen || UDP_SKB_CB(skb)->partial_cov) { |
759e5d00 | 372 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 373 | goto csum_copy_err; |
ba4e58ec GR |
374 | } |
375 | ||
60476372 | 376 | if (skb_csum_unnecessary(skb)) |
ba4e58ec | 377 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
81d54ec8 | 378 | msg->msg_iov,len); |
ba4e58ec | 379 | else { |
1da177e4 LT |
380 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
381 | if (err == -EINVAL) | |
382 | goto csum_copy_err; | |
383 | } | |
384 | if (err) | |
385 | goto out_free; | |
386 | ||
f26ba175 WY |
387 | if (!peeked) { |
388 | if (is_udp4) | |
389 | UDP_INC_STATS_USER(sock_net(sk), | |
390 | UDP_MIB_INDATAGRAMS, is_udplite); | |
391 | else | |
392 | UDP6_INC_STATS_USER(sock_net(sk), | |
393 | UDP_MIB_INDATAGRAMS, is_udplite); | |
394 | } | |
cb75994e | 395 | |
3b885787 | 396 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
397 | |
398 | /* Copy the address. */ | |
399 | if (msg->msg_name) { | |
400 | struct sockaddr_in6 *sin6; | |
1ab1457c | 401 | |
1da177e4 LT |
402 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
403 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 404 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
405 | sin6->sin6_flowinfo = 0; |
406 | sin6->sin6_scope_id = 0; | |
407 | ||
f26ba175 | 408 | if (is_udp4) |
b301e82c BH |
409 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
410 | &sin6->sin6_addr); | |
1da177e4 | 411 | else { |
0660e03f ACM |
412 | ipv6_addr_copy(&sin6->sin6_addr, |
413 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
414 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
415 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
416 | } | |
417 | ||
418 | } | |
f26ba175 | 419 | if (is_udp4) { |
1da177e4 LT |
420 | if (inet->cmsg_flags) |
421 | ip_cmsg_recv(msg, skb); | |
422 | } else { | |
423 | if (np->rxopt.all) | |
424 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 425 | } |
1da177e4 | 426 | |
81d54ec8 | 427 | err = len; |
1da177e4 | 428 | if (flags & MSG_TRUNC) |
759e5d00 | 429 | err = ulen; |
1da177e4 LT |
430 | |
431 | out_free: | |
9d410c79 | 432 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
433 | out: |
434 | return err; | |
435 | ||
436 | csum_copy_err: | |
8a74ad60 | 437 | slow = lock_sock_fast(sk); |
0856f939 WY |
438 | if (!skb_kill_datagram(sk, skb, flags)) { |
439 | if (is_udp4) | |
440 | UDP_INC_STATS_USER(sock_net(sk), | |
441 | UDP_MIB_INERRORS, is_udplite); | |
442 | else | |
443 | UDP6_INC_STATS_USER(sock_net(sk), | |
444 | UDP_MIB_INERRORS, is_udplite); | |
445 | } | |
8a74ad60 | 446 | unlock_sock_fast(sk, slow); |
1da177e4 | 447 | |
7a0ff716 | 448 | if (flags & MSG_DONTWAIT) |
1da177e4 | 449 | return -EAGAIN; |
1da177e4 LT |
450 | goto try_again; |
451 | } | |
452 | ||
ba4e58ec | 453 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 454 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 455 | struct udp_table *udptable) |
1da177e4 LT |
456 | { |
457 | struct ipv6_pinfo *np; | |
458 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
459 | struct in6_addr *saddr = &hdr->saddr; |
460 | struct in6_addr *daddr = &hdr->daddr; | |
461 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
462 | struct sock *sk; | |
463 | int err; | |
464 | ||
c346dca1 | 465 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 466 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
467 | if (sk == NULL) |
468 | return; | |
469 | ||
470 | np = inet6_sk(sk); | |
471 | ||
472 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
473 | goto out; | |
474 | ||
475 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
476 | goto out; | |
477 | ||
b1faf566 | 478 | if (np->recverr) |
1da177e4 | 479 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
b1faf566 | 480 | |
1da177e4 LT |
481 | sk->sk_err = err; |
482 | sk->sk_error_report(sk); | |
483 | out: | |
484 | sock_put(sk); | |
485 | } | |
486 | ||
ba4e58ec | 487 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
488 | struct inet6_skb_parm *opt, u8 type, |
489 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 490 | { |
645ca708 | 491 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
492 | } |
493 | ||
494 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 495 | { |
ba4e58ec | 496 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 497 | int rc; |
b2bf1e26 | 498 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 499 | |
ba4e58ec GR |
500 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
501 | goto drop; | |
1da177e4 | 502 | |
ba4e58ec GR |
503 | /* |
504 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
505 | */ | |
b2bf1e26 | 506 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
507 | |
508 | if (up->pcrlen == 0) { /* full coverage was set */ | |
509 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
510 | " %d while full coverage %d requested\n", | |
511 | UDP_SKB_CB(skb)->cscov, skb->len); | |
512 | goto drop; | |
513 | } | |
514 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
515 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
516 | "too small, need min %d\n", | |
517 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
518 | goto drop; | |
519 | } | |
1da177e4 LT |
520 | } |
521 | ||
1ab6eb62 HX |
522 | if (sk->sk_filter) { |
523 | if (udp_lib_checksum_complete(skb)) | |
524 | goto drop; | |
525 | } | |
ba4e58ec | 526 | |
f84af32c | 527 | if ((rc = ip_queue_rcv_skb(sk, skb)) < 0) { |
a18135eb | 528 | /* Note that an ENOMEM error is charged twice */ |
766e9037 | 529 | if (rc == -ENOMEM) |
ef28d1a2 PE |
530 | UDP6_INC_STATS_BH(sock_net(sk), |
531 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
8edf19c2 | 532 | goto drop_no_sk_drops_inc; |
1da177e4 | 533 | } |
cb75994e | 534 | |
1da177e4 | 535 | return 0; |
ba4e58ec | 536 | drop: |
8edf19c2 ED |
537 | atomic_inc(&sk->sk_drops); |
538 | drop_no_sk_drops_inc: | |
ef28d1a2 | 539 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
540 | kfree_skb(skb); |
541 | return -1; | |
1da177e4 LT |
542 | } |
543 | ||
920a4611 | 544 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
545 | __be16 loc_port, struct in6_addr *loc_addr, |
546 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
547 | int dif) |
548 | { | |
88ab1932 | 549 | struct hlist_nulls_node *node; |
1da177e4 LT |
550 | struct sock *s = sk; |
551 | unsigned short num = ntohs(loc_port); | |
552 | ||
88ab1932 | 553 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
554 | struct inet_sock *inet = inet_sk(s); |
555 | ||
920a4611 | 556 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
557 | continue; |
558 | ||
d4cada4a ED |
559 | if (udp_sk(s)->udp_port_hash == num && |
560 | s->sk_family == PF_INET6) { | |
1da177e4 | 561 | struct ipv6_pinfo *np = inet6_sk(s); |
c720c7e8 ED |
562 | if (inet->inet_dport) { |
563 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
564 | continue; |
565 | } | |
566 | if (!ipv6_addr_any(&np->daddr) && | |
567 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
568 | continue; | |
569 | ||
570 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
571 | continue; | |
572 | ||
573 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
574 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
575 | continue; | |
1da177e4 | 576 | } |
add459aa | 577 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
578 | continue; |
579 | return s; | |
580 | } | |
581 | } | |
582 | return NULL; | |
583 | } | |
584 | ||
a1ab77f9 ED |
585 | static void flush_stack(struct sock **stack, unsigned int count, |
586 | struct sk_buff *skb, unsigned int final) | |
587 | { | |
588 | unsigned int i; | |
589 | struct sock *sk; | |
590 | struct sk_buff *skb1; | |
591 | ||
592 | for (i = 0; i < count; i++) { | |
593 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
594 | ||
f6b8f32c | 595 | sk = stack[i]; |
a1ab77f9 | 596 | if (skb1) { |
c377411f ED |
597 | if (sk_rcvqueues_full(sk, skb)) { |
598 | kfree_skb(skb1); | |
599 | goto drop; | |
600 | } | |
a1ab77f9 ED |
601 | bh_lock_sock(sk); |
602 | if (!sock_owned_by_user(sk)) | |
603 | udpv6_queue_rcv_skb(sk, skb1); | |
a3a858ff | 604 | else if (sk_add_backlog(sk, skb1)) { |
55349790 ZY |
605 | kfree_skb(skb1); |
606 | bh_unlock_sock(sk); | |
607 | goto drop; | |
608 | } | |
a1ab77f9 | 609 | bh_unlock_sock(sk); |
55349790 | 610 | continue; |
a1ab77f9 | 611 | } |
55349790 ZY |
612 | drop: |
613 | atomic_inc(&sk->sk_drops); | |
614 | UDP6_INC_STATS_BH(sock_net(sk), | |
615 | UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); | |
616 | UDP6_INC_STATS_BH(sock_net(sk), | |
617 | UDP_MIB_INERRORS, IS_UDPLITE(sk)); | |
a1ab77f9 ED |
618 | } |
619 | } | |
1da177e4 LT |
620 | /* |
621 | * Note: called only from the BH handler context, | |
622 | * so we don't need to lock the hashes. | |
623 | */ | |
e3163493 PE |
624 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
625 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 626 | struct udp_table *udptable) |
1da177e4 | 627 | { |
a1ab77f9 | 628 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 629 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 630 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 631 | int dif; |
a1ab77f9 | 632 | unsigned int i, count = 0; |
1da177e4 | 633 | |
645ca708 | 634 | spin_lock(&hslot->lock); |
88ab1932 | 635 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 636 | dif = inet6_iif(skb); |
920a4611 | 637 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
638 | while (sk) { |
639 | stack[count++] = sk; | |
640 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
641 | uh->source, saddr, dif); | |
642 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
643 | if (!sk) | |
644 | break; | |
645 | flush_stack(stack, count, skb, ~0); | |
646 | count = 0; | |
95766fff | 647 | } |
1da177e4 | 648 | } |
a1ab77f9 ED |
649 | /* |
650 | * before releasing the lock, we must take reference on sockets | |
651 | */ | |
652 | for (i = 0; i < count; i++) | |
653 | sock_hold(stack[i]); | |
654 | ||
645ca708 | 655 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
656 | |
657 | if (count) { | |
658 | flush_stack(stack, count, skb, count - 1); | |
659 | ||
660 | for (i = 0; i < count; i++) | |
661 | sock_put(stack[i]); | |
662 | } else { | |
663 | kfree_skb(skb); | |
664 | } | |
ba4e58ec | 665 | return 0; |
1da177e4 LT |
666 | } |
667 | ||
759e5d00 HX |
668 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
669 | int proto) | |
ba4e58ec | 670 | { |
759e5d00 HX |
671 | int err; |
672 | ||
673 | UDP_SKB_CB(skb)->partial_cov = 0; | |
674 | UDP_SKB_CB(skb)->cscov = skb->len; | |
675 | ||
db8dac20 | 676 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
677 | err = udplite_checksum_init(skb, uh); |
678 | if (err) | |
679 | return err; | |
680 | } | |
681 | ||
ba4e58ec GR |
682 | if (uh->check == 0) { |
683 | /* RFC 2460 section 8.1 says that we SHOULD log | |
684 | this error. Well, it is reasonable. | |
685 | */ | |
686 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
687 | return 1; | |
688 | } | |
689 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 690 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 691 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
692 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
693 | ||
60476372 | 694 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
695 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
696 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 697 | skb->len, proto, 0)); |
ba4e58ec | 698 | |
759e5d00 | 699 | return 0; |
ba4e58ec GR |
700 | } |
701 | ||
645ca708 | 702 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 703 | int proto) |
1da177e4 | 704 | { |
3ffe533c | 705 | struct net *net = dev_net(skb->dev); |
1da177e4 | 706 | struct sock *sk; |
1ab1457c | 707 | struct udphdr *uh; |
1da177e4 LT |
708 | struct in6_addr *saddr, *daddr; |
709 | u32 ulen = 0; | |
710 | ||
711 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 712 | goto discard; |
1da177e4 | 713 | |
0660e03f ACM |
714 | saddr = &ipv6_hdr(skb)->saddr; |
715 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 716 | uh = udp_hdr(skb); |
1da177e4 LT |
717 | |
718 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
719 | if (ulen > skb->len) |
720 | goto short_packet; | |
1da177e4 | 721 | |
759e5d00 HX |
722 | if (proto == IPPROTO_UDP) { |
723 | /* UDP validates ulen. */ | |
1da177e4 | 724 | |
ba4e58ec GR |
725 | /* Check for jumbo payload */ |
726 | if (ulen == 0) | |
727 | ulen = skb->len; | |
1da177e4 | 728 | |
ba4e58ec GR |
729 | if (ulen < sizeof(*uh)) |
730 | goto short_packet; | |
1da177e4 | 731 | |
ba4e58ec GR |
732 | if (ulen < skb->len) { |
733 | if (pskb_trim_rcsum(skb, ulen)) | |
734 | goto short_packet; | |
0660e03f ACM |
735 | saddr = &ipv6_hdr(skb)->saddr; |
736 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 737 | uh = udp_hdr(skb); |
ba4e58ec | 738 | } |
ba4e58ec | 739 | } |
1da177e4 | 740 | |
759e5d00 HX |
741 | if (udp6_csum_init(skb, uh, proto)) |
742 | goto discard; | |
743 | ||
1ab1457c YH |
744 | /* |
745 | * Multicast receive code | |
1da177e4 | 746 | */ |
ba4e58ec | 747 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
748 | return __udp6_lib_mcast_deliver(net, skb, |
749 | saddr, daddr, udptable); | |
1da177e4 LT |
750 | |
751 | /* Unicast */ | |
752 | ||
1ab1457c | 753 | /* |
1da177e4 LT |
754 | * check socket cache ... must talk to Alan about his plans |
755 | * for sock caches... i'll skip this for now. | |
756 | */ | |
607c4aaf | 757 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
758 | |
759 | if (sk == NULL) { | |
760 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
761 | goto discard; | |
762 | ||
ba4e58ec | 763 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 764 | goto discard; |
ef28d1a2 PE |
765 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
766 | proto == IPPROTO_UDPLITE); | |
1da177e4 | 767 | |
3ffe533c | 768 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
1da177e4 LT |
769 | |
770 | kfree_skb(skb); | |
add459aa | 771 | return 0; |
1da177e4 | 772 | } |
1ab1457c | 773 | |
1da177e4 | 774 | /* deliver */ |
1ab1457c | 775 | |
c377411f ED |
776 | if (sk_rcvqueues_full(sk, skb)) { |
777 | sock_put(sk); | |
778 | goto discard; | |
779 | } | |
d97106ea | 780 | bh_lock_sock(sk); |
95766fff HA |
781 | if (!sock_owned_by_user(sk)) |
782 | udpv6_queue_rcv_skb(sk, skb); | |
a3a858ff | 783 | else if (sk_add_backlog(sk, skb)) { |
55349790 ZY |
784 | atomic_inc(&sk->sk_drops); |
785 | bh_unlock_sock(sk); | |
786 | sock_put(sk); | |
787 | goto discard; | |
788 | } | |
95766fff | 789 | bh_unlock_sock(sk); |
1da177e4 | 790 | sock_put(sk); |
add459aa | 791 | return 0; |
1da177e4 | 792 | |
1ab1457c | 793 | short_packet: |
d6bc0149 | 794 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 795 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
796 | saddr, |
797 | ntohs(uh->source), | |
798 | ulen, | |
799 | skb->len, | |
800 | daddr, | |
801 | ntohs(uh->dest)); | |
1da177e4 LT |
802 | |
803 | discard: | |
ef28d1a2 | 804 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 805 | kfree_skb(skb); |
add459aa | 806 | return 0; |
1da177e4 | 807 | } |
ba4e58ec | 808 | |
e5bbef20 | 809 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 810 | { |
645ca708 | 811 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
812 | } |
813 | ||
1da177e4 LT |
814 | /* |
815 | * Throw away all pending data and cancel the corking. Socket is locked. | |
816 | */ | |
817 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
818 | { | |
819 | struct udp_sock *up = udp_sk(sk); | |
820 | ||
36d926b9 DL |
821 | if (up->pending == AF_INET) |
822 | udp_flush_pending_frames(sk); | |
823 | else if (up->pending) { | |
1da177e4 LT |
824 | up->len = 0; |
825 | up->pending = 0; | |
826 | ip6_flush_pending_frames(sk); | |
1ab1457c | 827 | } |
1da177e4 LT |
828 | } |
829 | ||
493c6be3 SS |
830 | /** |
831 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
832 | * @sk: socket we are sending on | |
833 | * @skb: sk_buff containing the filled-in UDP header | |
834 | * (checksum field must be zeroed out) | |
835 | */ | |
836 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
837 | const struct in6_addr *saddr, | |
838 | const struct in6_addr *daddr, int len) | |
839 | { | |
840 | unsigned int offset; | |
841 | struct udphdr *uh = udp_hdr(skb); | |
842 | __wsum csum = 0; | |
843 | ||
844 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
845 | /* Only one fragment on the socket. */ | |
846 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
847 | skb->csum_offset = offsetof(struct udphdr, check); | |
848 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
849 | } else { | |
850 | /* | |
851 | * HW-checksum won't work as there are two or more | |
852 | * fragments on the socket so that all csums of sk_buffs | |
853 | * should be together | |
854 | */ | |
855 | offset = skb_transport_offset(skb); | |
856 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
857 | ||
858 | skb->ip_summed = CHECKSUM_NONE; | |
859 | ||
860 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
861 | csum = csum_add(csum, skb->csum); | |
862 | } | |
863 | ||
864 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
865 | csum); | |
866 | if (uh->check == 0) | |
867 | uh->check = CSUM_MANGLED_0; | |
868 | } | |
869 | } | |
870 | ||
1da177e4 LT |
871 | /* |
872 | * Sending | |
873 | */ | |
874 | ||
4c0a6cb0 | 875 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
876 | { |
877 | struct sk_buff *skb; | |
878 | struct udphdr *uh; | |
4c0a6cb0 | 879 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
880 | struct inet_sock *inet = inet_sk(sk); |
881 | struct flowi *fl = &inet->cork.fl; | |
882 | int err = 0; | |
b2bf1e26 | 883 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 884 | __wsum csum = 0; |
1da177e4 LT |
885 | |
886 | /* Grab the skbuff where UDP header space exists. */ | |
887 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
888 | goto out; | |
889 | ||
890 | /* | |
891 | * Create a UDP header | |
892 | */ | |
4bedb452 | 893 | uh = udp_hdr(skb); |
1da177e4 LT |
894 | uh->source = fl->fl_ip_sport; |
895 | uh->dest = fl->fl_ip_dport; | |
896 | uh->len = htons(up->len); | |
897 | uh->check = 0; | |
898 | ||
b2bf1e26 | 899 | if (is_udplite) |
ba4e58ec | 900 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 SS |
901 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
902 | udp6_hwcsum_outgoing(sk, skb, &fl->fl6_src, &fl->fl6_dst, | |
903 | up->len); | |
904 | goto send; | |
905 | } else | |
ba4e58ec | 906 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 907 | |
ba4e58ec GR |
908 | /* add protocol-dependent pseudo-header */ |
909 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
910 | up->len, fl->proto, csum ); | |
1da177e4 | 911 | if (uh->check == 0) |
f6ab0288 | 912 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 913 | |
493c6be3 | 914 | send: |
1da177e4 | 915 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
916 | if (err) { |
917 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
918 | UDP6_INC_STATS_USER(sock_net(sk), | |
919 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
920 | err = 0; | |
921 | } | |
922 | } else | |
923 | UDP6_INC_STATS_USER(sock_net(sk), | |
924 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
925 | out: |
926 | up->len = 0; | |
927 | up->pending = 0; | |
928 | return err; | |
929 | } | |
930 | ||
ba4e58ec | 931 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
932 | struct msghdr *msg, size_t len) |
933 | { | |
934 | struct ipv6_txoptions opt_space; | |
935 | struct udp_sock *up = udp_sk(sk); | |
936 | struct inet_sock *inet = inet_sk(sk); | |
937 | struct ipv6_pinfo *np = inet6_sk(sk); | |
938 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 939 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
940 | struct ipv6_txoptions *opt = NULL; |
941 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 942 | struct flowi fl; |
1da177e4 LT |
943 | struct dst_entry *dst; |
944 | int addr_len = msg->msg_namelen; | |
945 | int ulen = len; | |
946 | int hlimit = -1; | |
41a1f8ea | 947 | int tclass = -1; |
13b52cd4 | 948 | int dontfrag = -1; |
1da177e4 LT |
949 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
950 | int err; | |
987905de | 951 | int connected = 0; |
b2bf1e26 | 952 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 953 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
954 | |
955 | /* destination address check */ | |
956 | if (sin6) { | |
957 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
958 | return -EINVAL; | |
959 | ||
960 | switch (sin6->sin6_family) { | |
961 | case AF_INET6: | |
962 | if (addr_len < SIN6_LEN_RFC2133) | |
963 | return -EINVAL; | |
964 | daddr = &sin6->sin6_addr; | |
965 | break; | |
966 | case AF_INET: | |
967 | goto do_udp_sendmsg; | |
968 | case AF_UNSPEC: | |
969 | msg->msg_name = sin6 = NULL; | |
970 | msg->msg_namelen = addr_len = 0; | |
971 | daddr = NULL; | |
972 | break; | |
973 | default: | |
974 | return -EINVAL; | |
975 | } | |
976 | } else if (!up->pending) { | |
977 | if (sk->sk_state != TCP_ESTABLISHED) | |
978 | return -EDESTADDRREQ; | |
979 | daddr = &np->daddr; | |
1ab1457c | 980 | } else |
1da177e4 LT |
981 | daddr = NULL; |
982 | ||
983 | if (daddr) { | |
e773e4fa | 984 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
985 | struct sockaddr_in sin; |
986 | sin.sin_family = AF_INET; | |
c720c7e8 | 987 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
988 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
989 | msg->msg_name = &sin; | |
990 | msg->msg_namelen = sizeof(sin); | |
991 | do_udp_sendmsg: | |
992 | if (__ipv6_only_sock(sk)) | |
993 | return -ENETUNREACH; | |
994 | return udp_sendmsg(iocb, sk, msg, len); | |
995 | } | |
996 | } | |
997 | ||
998 | if (up->pending == AF_INET) | |
999 | return udp_sendmsg(iocb, sk, msg, len); | |
1000 | ||
1001 | /* Rough check on arithmetic overflow, | |
b59e139b | 1002 | better check is made in ip6_append_data(). |
1da177e4 LT |
1003 | */ |
1004 | if (len > INT_MAX - sizeof(struct udphdr)) | |
1005 | return -EMSGSIZE; | |
1ab1457c | 1006 | |
1da177e4 LT |
1007 | if (up->pending) { |
1008 | /* | |
1009 | * There are pending frames. | |
1010 | * The socket lock must be held while it's corked. | |
1011 | */ | |
1012 | lock_sock(sk); | |
1013 | if (likely(up->pending)) { | |
1014 | if (unlikely(up->pending != AF_INET6)) { | |
1015 | release_sock(sk); | |
1016 | return -EAFNOSUPPORT; | |
1017 | } | |
1018 | dst = NULL; | |
1019 | goto do_append_data; | |
1020 | } | |
1021 | release_sock(sk); | |
1022 | } | |
1023 | ulen += sizeof(struct udphdr); | |
1024 | ||
132a55f3 | 1025 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
1026 | |
1027 | if (sin6) { | |
1028 | if (sin6->sin6_port == 0) | |
1029 | return -EINVAL; | |
1030 | ||
132a55f3 | 1031 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
1032 | daddr = &sin6->sin6_addr; |
1033 | ||
1034 | if (np->sndflow) { | |
132a55f3 HX |
1035 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1036 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
1037 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1038 | if (flowlabel == NULL) |
1039 | return -EINVAL; | |
1040 | daddr = &flowlabel->dst; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Otherwise it will be difficult to maintain | |
1046 | * sk->sk_dst_cache. | |
1047 | */ | |
1048 | if (sk->sk_state == TCP_ESTABLISHED && | |
1049 | ipv6_addr_equal(daddr, &np->daddr)) | |
1050 | daddr = &np->daddr; | |
1051 | ||
1052 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1053 | sin6->sin6_scope_id && | |
1054 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 1055 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
1056 | } else { |
1057 | if (sk->sk_state != TCP_ESTABLISHED) | |
1058 | return -EDESTADDRREQ; | |
1059 | ||
c720c7e8 | 1060 | fl.fl_ip_dport = inet->inet_dport; |
1da177e4 | 1061 | daddr = &np->daddr; |
132a55f3 | 1062 | fl.fl6_flowlabel = np->flow_label; |
987905de | 1063 | connected = 1; |
1da177e4 LT |
1064 | } |
1065 | ||
132a55f3 HX |
1066 | if (!fl.oif) |
1067 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 | 1068 | |
9f690db7 YH |
1069 | if (!fl.oif) |
1070 | fl.oif = np->sticky_pktinfo.ipi6_ifindex; | |
1071 | ||
51953d5b BH |
1072 | fl.mark = sk->sk_mark; |
1073 | ||
1da177e4 LT |
1074 | if (msg->msg_controllen) { |
1075 | opt = &opt_space; | |
1076 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1077 | opt->tot_len = sizeof(*opt); | |
1078 | ||
13b52cd4 BH |
1079 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, |
1080 | &tclass, &dontfrag); | |
1da177e4 LT |
1081 | if (err < 0) { |
1082 | fl6_sock_release(flowlabel); | |
1083 | return err; | |
1084 | } | |
132a55f3 HX |
1085 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1086 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1087 | if (flowlabel == NULL) |
1088 | return -EINVAL; | |
1089 | } | |
1090 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1091 | opt = NULL; | |
987905de | 1092 | connected = 0; |
1da177e4 LT |
1093 | } |
1094 | if (opt == NULL) | |
1095 | opt = np->opt; | |
df9890c3 YH |
1096 | if (flowlabel) |
1097 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1098 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1099 | |
ba4e58ec | 1100 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
1101 | if (!ipv6_addr_any(daddr)) |
1102 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
1103 | else | |
1104 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
1105 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
1106 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
c720c7e8 | 1107 | fl.fl_ip_sport = inet->inet_sport; |
1ab1457c | 1108 | |
20c59de2 AE |
1109 | final_p = fl6_update_dst(&fl, opt, &final); |
1110 | if (final_p) | |
987905de | 1111 | connected = 0; |
1da177e4 | 1112 | |
132a55f3 HX |
1113 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
1114 | fl.oif = np->mcast_oif; | |
987905de MK |
1115 | connected = 0; |
1116 | } | |
1da177e4 | 1117 | |
132a55f3 | 1118 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 1119 | |
132a55f3 | 1120 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
1121 | if (err) |
1122 | goto out; | |
1123 | if (final_p) | |
132a55f3 | 1124 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 1125 | |
52479b62 AD |
1126 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
1127 | if (err < 0) { | |
14e50e57 DM |
1128 | if (err == -EREMOTE) |
1129 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
1130 | if (err < 0) | |
1131 | goto out; | |
1132 | } | |
1da177e4 LT |
1133 | |
1134 | if (hlimit < 0) { | |
132a55f3 | 1135 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
1136 | hlimit = np->mcast_hops; |
1137 | else | |
1138 | hlimit = np->hop_limit; | |
1139 | if (hlimit < 0) | |
6b75d090 | 1140 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1141 | } |
1142 | ||
e651f03a | 1143 | if (tclass < 0) |
41a1f8ea | 1144 | tclass = np->tclass; |
41a1f8ea | 1145 | |
13b52cd4 BH |
1146 | if (dontfrag < 0) |
1147 | dontfrag = np->dontfrag; | |
1148 | ||
1da177e4 LT |
1149 | if (msg->msg_flags&MSG_CONFIRM) |
1150 | goto do_confirm; | |
1151 | back_from_confirm: | |
1152 | ||
1153 | lock_sock(sk); | |
1154 | if (unlikely(up->pending)) { | |
1155 | /* The socket is already corked while preparing it. */ | |
1156 | /* ... which is an evident application bug. --ANK */ | |
1157 | release_sock(sk); | |
1158 | ||
64ce2073 | 1159 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1160 | err = -EINVAL; |
1161 | goto out; | |
1162 | } | |
1163 | ||
1164 | up->pending = AF_INET6; | |
1165 | ||
1166 | do_append_data: | |
1167 | up->len += ulen; | |
ba4e58ec GR |
1168 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1169 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 1170 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea | 1171 | (struct rt6_info*)dst, |
13b52cd4 | 1172 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1173 | if (err) |
1174 | udp_v6_flush_pending_frames(sk); | |
1175 | else if (!corkreq) | |
4c0a6cb0 | 1176 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1177 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1178 | up->pending = 0; | |
1da177e4 | 1179 | |
a5e7c210 DM |
1180 | if (dst) { |
1181 | if (connected) { | |
1182 | ip6_dst_store(sk, dst, | |
132a55f3 | 1183 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
1184 | &np->daddr : NULL, |
1185 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 1186 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
1187 | &np->saddr : |
1188 | #endif | |
1189 | NULL); | |
a5e7c210 DM |
1190 | } else { |
1191 | dst_release(dst); | |
1192 | } | |
a3c96089 | 1193 | dst = NULL; |
a5e7c210 DM |
1194 | } |
1195 | ||
1da177e4 LT |
1196 | if (err > 0) |
1197 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1198 | release_sock(sk); | |
1199 | out: | |
a3c96089 | 1200 | dst_release(dst); |
1da177e4 | 1201 | fl6_sock_release(flowlabel); |
cd562c98 | 1202 | if (!err) |
1da177e4 | 1203 | return len; |
a18135eb DM |
1204 | /* |
1205 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1206 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1207 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1208 | * things). We could add another new stat but at least for now that | |
1209 | * seems like overkill. | |
1210 | */ | |
1211 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1212 | UDP6_INC_STATS_USER(sock_net(sk), |
1213 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1214 | } |
1da177e4 LT |
1215 | return err; |
1216 | ||
1217 | do_confirm: | |
1218 | dst_confirm(dst); | |
1219 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1220 | goto back_from_confirm; | |
1221 | err = 0; | |
1222 | goto out; | |
1223 | } | |
1224 | ||
7d06b2e0 | 1225 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
1226 | { |
1227 | lock_sock(sk); | |
1228 | udp_v6_flush_pending_frames(sk); | |
1229 | release_sock(sk); | |
1230 | ||
1231 | inet6_destroy_sock(sk); | |
1da177e4 LT |
1232 | } |
1233 | ||
1234 | /* | |
1235 | * Socket option code for UDP | |
1236 | */ | |
ba4e58ec | 1237 | int 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 ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1244 | } |
1245 | ||
1246 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1247 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1248 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1249 | { |
db8dac20 | 1250 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1251 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1252 | udp_v6_push_pending_frames); | |
ba4e58ec | 1253 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1254 | } |
1255 | #endif | |
1256 | ||
ba4e58ec GR |
1257 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1258 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1259 | { |
db8dac20 | 1260 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1261 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1262 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1263 | } |
1264 | ||
1265 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1266 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1267 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1268 | { |
db8dac20 | 1269 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1270 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1271 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1272 | } |
1273 | #endif | |
1274 | ||
ba735425 SS |
1275 | static int udp6_ufo_send_check(struct sk_buff *skb) |
1276 | { | |
1277 | struct ipv6hdr *ipv6h; | |
1278 | struct udphdr *uh; | |
1279 | ||
1280 | if (!pskb_may_pull(skb, sizeof(*uh))) | |
1281 | return -EINVAL; | |
1282 | ||
1283 | ipv6h = ipv6_hdr(skb); | |
1284 | uh = udp_hdr(skb); | |
1285 | ||
1286 | uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, | |
1287 | IPPROTO_UDP, 0); | |
1288 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
1289 | skb->csum_offset = offsetof(struct udphdr, check); | |
1290 | skb->ip_summed = CHECKSUM_PARTIAL; | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features) | |
1295 | { | |
1296 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
1297 | unsigned int mss; | |
1298 | unsigned int unfrag_ip6hlen, unfrag_len; | |
1299 | struct frag_hdr *fptr; | |
1300 | u8 *mac_start, *prevhdr; | |
1301 | u8 nexthdr; | |
1302 | u8 frag_hdr_sz = sizeof(struct frag_hdr); | |
1303 | int offset; | |
1304 | __wsum csum; | |
1305 | ||
1306 | mss = skb_shinfo(skb)->gso_size; | |
1307 | if (unlikely(skb->len <= mss)) | |
1308 | goto out; | |
1309 | ||
1310 | if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { | |
1311 | /* Packet is from an untrusted source, reset gso_segs. */ | |
1312 | int type = skb_shinfo(skb)->gso_type; | |
1313 | ||
1314 | if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || | |
1315 | !(type & (SKB_GSO_UDP)))) | |
1316 | goto out; | |
1317 | ||
1318 | skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); | |
1319 | ||
1320 | segs = NULL; | |
1321 | goto out; | |
1322 | } | |
1323 | ||
1324 | /* Do software UFO. Complete and fill in the UDP checksum as HW cannot | |
1325 | * do checksum of UDP packets sent as multiple IP fragments. | |
1326 | */ | |
1327 | offset = skb->csum_start - skb_headroom(skb); | |
1328 | csum = skb_checksum(skb, offset, skb->len- offset, 0); | |
1329 | offset += skb->csum_offset; | |
1330 | *(__sum16 *)(skb->data + offset) = csum_fold(csum); | |
1331 | skb->ip_summed = CHECKSUM_NONE; | |
1332 | ||
1333 | /* Check if there is enough headroom to insert fragment header. */ | |
1334 | if ((skb_headroom(skb) < frag_hdr_sz) && | |
1335 | pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) | |
1336 | goto out; | |
1337 | ||
1338 | /* Find the unfragmentable header and shift it left by frag_hdr_sz | |
1339 | * bytes to insert fragment header. | |
1340 | */ | |
1341 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
1342 | nexthdr = *prevhdr; | |
1343 | *prevhdr = NEXTHDR_FRAGMENT; | |
1344 | unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + | |
1345 | unfrag_ip6hlen; | |
1346 | mac_start = skb_mac_header(skb); | |
1347 | memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); | |
1348 | ||
1349 | skb->mac_header -= frag_hdr_sz; | |
1350 | skb->network_header -= frag_hdr_sz; | |
1351 | ||
1352 | fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); | |
1353 | fptr->nexthdr = nexthdr; | |
1354 | fptr->reserved = 0; | |
1355 | ipv6_select_ident(fptr); | |
1356 | ||
1357 | /* Fragment the skb. ipv6 header and the remaining fields of the | |
1358 | * fragment header are updated in ipv6_gso_segment() | |
1359 | */ | |
1360 | segs = skb_segment(skb, features); | |
1361 | ||
1362 | out: | |
1363 | return segs; | |
1364 | } | |
1365 | ||
41135cc8 | 1366 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1367 | .handler = udpv6_rcv, |
1368 | .err_handler = udpv6_err, | |
ba735425 SS |
1369 | .gso_send_check = udp6_ufo_send_check, |
1370 | .gso_segment = udp6_ufo_fragment, | |
1da177e4 LT |
1371 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
1372 | }; | |
1373 | ||
1374 | /* ------------------------------------------------------------------------ */ | |
1375 | #ifdef CONFIG_PROC_FS | |
1376 | ||
1377 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1378 | { | |
1379 | struct inet_sock *inet = inet_sk(sp); | |
1380 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1381 | struct in6_addr *dest, *src; | |
1382 | __u16 destp, srcp; | |
1383 | ||
1384 | dest = &np->daddr; | |
1385 | src = &np->rcv_saddr; | |
c720c7e8 ED |
1386 | destp = ntohs(inet->inet_dport); |
1387 | srcp = ntohs(inet->inet_sport); | |
1da177e4 | 1388 | seq_printf(seq, |
f86dcc5a | 1389 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
cb61cb9b | 1390 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1391 | bucket, |
1392 | src->s6_addr32[0], src->s6_addr32[1], | |
1393 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1394 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1395 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1396 | sp->sk_state, |
31e6d363 ED |
1397 | sk_wmem_alloc_get(sp), |
1398 | sk_rmem_alloc_get(sp), | |
1da177e4 LT |
1399 | 0, 0L, 0, |
1400 | sock_i_uid(sp), 0, | |
1401 | sock_i_ino(sp), | |
cb61cb9b ED |
1402 | atomic_read(&sp->sk_refcnt), sp, |
1403 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1404 | } |
1405 | ||
ba4e58ec | 1406 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1407 | { |
1408 | if (v == SEQ_START_TOKEN) | |
1409 | seq_printf(seq, | |
1410 | " sl " | |
1411 | "local_address " | |
1412 | "remote_address " | |
1413 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1414 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1415 | else |
1416 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1da177e4 | 1420 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1421 | .name = "udp6", |
1422 | .family = AF_INET6, | |
645ca708 | 1423 | .udp_table = &udp_table, |
4ad96d39 DL |
1424 | .seq_fops = { |
1425 | .owner = THIS_MODULE, | |
1426 | }, | |
dda61925 DL |
1427 | .seq_ops = { |
1428 | .show = udp6_seq_show, | |
1429 | }, | |
1da177e4 LT |
1430 | }; |
1431 | ||
2c8c1e72 | 1432 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1433 | { |
0c96d8c5 | 1434 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1435 | } |
1436 | ||
0c96d8c5 DL |
1437 | void udp6_proc_exit(struct net *net) { |
1438 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1439 | } |
1440 | #endif /* CONFIG_PROC_FS */ | |
1441 | ||
1442 | /* ------------------------------------------------------------------------ */ | |
1443 | ||
1444 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1445 | .name = "UDPv6", |
1446 | .owner = THIS_MODULE, | |
ba4e58ec | 1447 | .close = udp_lib_close, |
543d9cfe ACM |
1448 | .connect = ip6_datagram_connect, |
1449 | .disconnect = udp_disconnect, | |
1450 | .ioctl = udp_ioctl, | |
1451 | .destroy = udpv6_destroy_sock, | |
1452 | .setsockopt = udpv6_setsockopt, | |
1453 | .getsockopt = udpv6_getsockopt, | |
1454 | .sendmsg = udpv6_sendmsg, | |
1455 | .recvmsg = udpv6_recvmsg, | |
1456 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1457 | .hash = udp_lib_hash, |
1458 | .unhash = udp_lib_unhash, | |
719f8358 | 1459 | .rehash = udp_v6_rehash, |
543d9cfe | 1460 | .get_port = udp_v6_get_port, |
95766fff HA |
1461 | .memory_allocated = &udp_memory_allocated, |
1462 | .sysctl_mem = sysctl_udp_mem, | |
1463 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1464 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1465 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1466 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1467 | .h.udp_table = &udp_table, |
3fdadf7d | 1468 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1469 | .compat_setsockopt = compat_udpv6_setsockopt, |
1470 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1471 | #endif |
1da177e4 LT |
1472 | }; |
1473 | ||
1da177e4 LT |
1474 | static struct inet_protosw udpv6_protosw = { |
1475 | .type = SOCK_DGRAM, | |
1476 | .protocol = IPPROTO_UDP, | |
1477 | .prot = &udpv6_prot, | |
1478 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1479 | .no_check = UDP_CSUM_DEFAULT, |
1480 | .flags = INET_PROTOSW_PERMANENT, | |
1481 | }; | |
1482 | ||
1483 | ||
7f4e4868 | 1484 | int __init udpv6_init(void) |
1da177e4 | 1485 | { |
7f4e4868 DL |
1486 | int ret; |
1487 | ||
1488 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1489 | if (ret) | |
1490 | goto out; | |
1491 | ||
1492 | ret = inet6_register_protosw(&udpv6_protosw); | |
1493 | if (ret) | |
1494 | goto out_udpv6_protocol; | |
1495 | out: | |
1496 | return ret; | |
1497 | ||
1498 | out_udpv6_protocol: | |
1499 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1500 | goto out; | |
1501 | } | |
1502 | ||
09f7709f | 1503 | void udpv6_exit(void) |
7f4e4868 DL |
1504 | { |
1505 | inet6_unregister_protosw(&udpv6_protosw); | |
1506 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1507 | } |