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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; |
8a74ad60 | 331 | bool slow; |
1da177e4 | 332 | |
1ab1457c YH |
333 | if (addr_len) |
334 | *addr_len=sizeof(struct sockaddr_in6); | |
335 | ||
1da177e4 LT |
336 | if (flags & MSG_ERRQUEUE) |
337 | return ipv6_recv_error(sk, msg, len); | |
338 | ||
4b340ae2 BH |
339 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
340 | return ipv6_recv_rxpmtu(sk, msg, len); | |
341 | ||
1da177e4 | 342 | try_again: |
a59322be HX |
343 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
344 | &peeked, &err); | |
1da177e4 LT |
345 | if (!skb) |
346 | goto out; | |
347 | ||
759e5d00 | 348 | ulen = skb->len - sizeof(struct udphdr); |
81d54ec8 GR |
349 | if (len > ulen) |
350 | len = ulen; | |
351 | else if (len < ulen) | |
1ab1457c | 352 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 353 | |
f26ba175 WY |
354 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
355 | ||
ba4e58ec | 356 | /* |
759e5d00 HX |
357 | * If checksum is needed at all, try to do it while copying the |
358 | * data. If the data is truncated, or if we only want a partial | |
359 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 360 | */ |
ba4e58ec | 361 | |
81d54ec8 | 362 | if (len < ulen || UDP_SKB_CB(skb)->partial_cov) { |
759e5d00 | 363 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 364 | goto csum_copy_err; |
ba4e58ec GR |
365 | } |
366 | ||
60476372 | 367 | if (skb_csum_unnecessary(skb)) |
ba4e58ec | 368 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
81d54ec8 | 369 | msg->msg_iov,len); |
ba4e58ec | 370 | else { |
1da177e4 LT |
371 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
372 | if (err == -EINVAL) | |
373 | goto csum_copy_err; | |
374 | } | |
375 | if (err) | |
376 | goto out_free; | |
377 | ||
f26ba175 WY |
378 | if (!peeked) { |
379 | if (is_udp4) | |
380 | UDP_INC_STATS_USER(sock_net(sk), | |
381 | UDP_MIB_INDATAGRAMS, is_udplite); | |
382 | else | |
383 | UDP6_INC_STATS_USER(sock_net(sk), | |
384 | UDP_MIB_INDATAGRAMS, is_udplite); | |
385 | } | |
cb75994e | 386 | |
3b885787 | 387 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
388 | |
389 | /* Copy the address. */ | |
390 | if (msg->msg_name) { | |
391 | struct sockaddr_in6 *sin6; | |
1ab1457c | 392 | |
1da177e4 LT |
393 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
394 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 395 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
396 | sin6->sin6_flowinfo = 0; |
397 | sin6->sin6_scope_id = 0; | |
398 | ||
f26ba175 | 399 | if (is_udp4) |
b301e82c BH |
400 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
401 | &sin6->sin6_addr); | |
1da177e4 | 402 | else { |
0660e03f ACM |
403 | ipv6_addr_copy(&sin6->sin6_addr, |
404 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
405 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
406 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
407 | } | |
408 | ||
409 | } | |
f26ba175 | 410 | if (is_udp4) { |
1da177e4 LT |
411 | if (inet->cmsg_flags) |
412 | ip_cmsg_recv(msg, skb); | |
413 | } else { | |
414 | if (np->rxopt.all) | |
415 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 416 | } |
1da177e4 | 417 | |
81d54ec8 | 418 | err = len; |
1da177e4 | 419 | if (flags & MSG_TRUNC) |
759e5d00 | 420 | err = ulen; |
1da177e4 LT |
421 | |
422 | out_free: | |
9d410c79 | 423 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
424 | out: |
425 | return err; | |
426 | ||
427 | csum_copy_err: | |
8a74ad60 | 428 | slow = lock_sock_fast(sk); |
0856f939 WY |
429 | if (!skb_kill_datagram(sk, skb, flags)) { |
430 | if (is_udp4) | |
431 | UDP_INC_STATS_USER(sock_net(sk), | |
432 | UDP_MIB_INERRORS, is_udplite); | |
433 | else | |
434 | UDP6_INC_STATS_USER(sock_net(sk), | |
435 | UDP_MIB_INERRORS, is_udplite); | |
436 | } | |
8a74ad60 | 437 | unlock_sock_fast(sk, slow); |
1da177e4 | 438 | |
7a0ff716 | 439 | if (flags & MSG_DONTWAIT) |
1da177e4 | 440 | return -EAGAIN; |
1da177e4 LT |
441 | goto try_again; |
442 | } | |
443 | ||
ba4e58ec | 444 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 445 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 446 | struct udp_table *udptable) |
1da177e4 LT |
447 | { |
448 | struct ipv6_pinfo *np; | |
449 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; | |
1da177e4 LT |
450 | struct in6_addr *saddr = &hdr->saddr; |
451 | struct in6_addr *daddr = &hdr->daddr; | |
452 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); | |
453 | struct sock *sk; | |
454 | int err; | |
455 | ||
c346dca1 | 456 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 457 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
458 | if (sk == NULL) |
459 | return; | |
460 | ||
461 | np = inet6_sk(sk); | |
462 | ||
463 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
464 | goto out; | |
465 | ||
466 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
467 | goto out; | |
468 | ||
b1faf566 | 469 | if (np->recverr) |
1da177e4 | 470 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
b1faf566 | 471 | |
1da177e4 LT |
472 | sk->sk_err = err; |
473 | sk->sk_error_report(sk); | |
474 | out: | |
475 | sock_put(sk); | |
476 | } | |
477 | ||
ba4e58ec | 478 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
479 | struct inet6_skb_parm *opt, u8 type, |
480 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 481 | { |
645ca708 | 482 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
483 | } |
484 | ||
485 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 486 | { |
ba4e58ec | 487 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 488 | int rc; |
b2bf1e26 | 489 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 490 | |
ba4e58ec GR |
491 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
492 | goto drop; | |
1da177e4 | 493 | |
ba4e58ec GR |
494 | /* |
495 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
496 | */ | |
b2bf1e26 | 497 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
498 | |
499 | if (up->pcrlen == 0) { /* full coverage was set */ | |
500 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
501 | " %d while full coverage %d requested\n", | |
502 | UDP_SKB_CB(skb)->cscov, skb->len); | |
503 | goto drop; | |
504 | } | |
505 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
506 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
507 | "too small, need min %d\n", | |
508 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
509 | goto drop; | |
510 | } | |
1da177e4 LT |
511 | } |
512 | ||
1ab6eb62 HX |
513 | if (sk->sk_filter) { |
514 | if (udp_lib_checksum_complete(skb)) | |
515 | goto drop; | |
516 | } | |
ba4e58ec | 517 | |
f84af32c | 518 | if ((rc = ip_queue_rcv_skb(sk, skb)) < 0) { |
a18135eb | 519 | /* Note that an ENOMEM error is charged twice */ |
766e9037 | 520 | if (rc == -ENOMEM) |
ef28d1a2 PE |
521 | UDP6_INC_STATS_BH(sock_net(sk), |
522 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
8edf19c2 | 523 | goto drop_no_sk_drops_inc; |
1da177e4 | 524 | } |
cb75994e | 525 | |
1da177e4 | 526 | return 0; |
ba4e58ec | 527 | drop: |
8edf19c2 ED |
528 | atomic_inc(&sk->sk_drops); |
529 | drop_no_sk_drops_inc: | |
ef28d1a2 | 530 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
531 | kfree_skb(skb); |
532 | return -1; | |
1da177e4 LT |
533 | } |
534 | ||
920a4611 | 535 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
536 | __be16 loc_port, struct in6_addr *loc_addr, |
537 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
538 | int dif) |
539 | { | |
88ab1932 | 540 | struct hlist_nulls_node *node; |
1da177e4 LT |
541 | struct sock *s = sk; |
542 | unsigned short num = ntohs(loc_port); | |
543 | ||
88ab1932 | 544 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
545 | struct inet_sock *inet = inet_sk(s); |
546 | ||
920a4611 | 547 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
548 | continue; |
549 | ||
d4cada4a ED |
550 | if (udp_sk(s)->udp_port_hash == num && |
551 | s->sk_family == PF_INET6) { | |
1da177e4 | 552 | struct ipv6_pinfo *np = inet6_sk(s); |
c720c7e8 ED |
553 | if (inet->inet_dport) { |
554 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
555 | continue; |
556 | } | |
557 | if (!ipv6_addr_any(&np->daddr) && | |
558 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
559 | continue; | |
560 | ||
561 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
562 | continue; | |
563 | ||
564 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
565 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
566 | continue; | |
1da177e4 | 567 | } |
add459aa | 568 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
569 | continue; |
570 | return s; | |
571 | } | |
572 | } | |
573 | return NULL; | |
574 | } | |
575 | ||
a1ab77f9 ED |
576 | static void flush_stack(struct sock **stack, unsigned int count, |
577 | struct sk_buff *skb, unsigned int final) | |
578 | { | |
579 | unsigned int i; | |
580 | struct sock *sk; | |
581 | struct sk_buff *skb1; | |
582 | ||
583 | for (i = 0; i < count; i++) { | |
584 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
585 | ||
f6b8f32c | 586 | sk = stack[i]; |
a1ab77f9 | 587 | if (skb1) { |
c377411f ED |
588 | if (sk_rcvqueues_full(sk, skb)) { |
589 | kfree_skb(skb1); | |
590 | goto drop; | |
591 | } | |
a1ab77f9 ED |
592 | bh_lock_sock(sk); |
593 | if (!sock_owned_by_user(sk)) | |
594 | udpv6_queue_rcv_skb(sk, skb1); | |
a3a858ff | 595 | else if (sk_add_backlog(sk, skb1)) { |
55349790 ZY |
596 | kfree_skb(skb1); |
597 | bh_unlock_sock(sk); | |
598 | goto drop; | |
599 | } | |
a1ab77f9 | 600 | bh_unlock_sock(sk); |
55349790 | 601 | continue; |
a1ab77f9 | 602 | } |
55349790 ZY |
603 | drop: |
604 | atomic_inc(&sk->sk_drops); | |
605 | UDP6_INC_STATS_BH(sock_net(sk), | |
606 | UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); | |
607 | UDP6_INC_STATS_BH(sock_net(sk), | |
608 | UDP_MIB_INERRORS, IS_UDPLITE(sk)); | |
a1ab77f9 ED |
609 | } |
610 | } | |
1da177e4 LT |
611 | /* |
612 | * Note: called only from the BH handler context, | |
613 | * so we don't need to lock the hashes. | |
614 | */ | |
e3163493 PE |
615 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
616 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 617 | struct udp_table *udptable) |
1da177e4 | 618 | { |
a1ab77f9 | 619 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 620 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 621 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 622 | int dif; |
a1ab77f9 | 623 | unsigned int i, count = 0; |
1da177e4 | 624 | |
645ca708 | 625 | spin_lock(&hslot->lock); |
88ab1932 | 626 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 627 | dif = inet6_iif(skb); |
920a4611 | 628 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
629 | while (sk) { |
630 | stack[count++] = sk; | |
631 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
632 | uh->source, saddr, dif); | |
633 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
634 | if (!sk) | |
635 | break; | |
636 | flush_stack(stack, count, skb, ~0); | |
637 | count = 0; | |
95766fff | 638 | } |
1da177e4 | 639 | } |
a1ab77f9 ED |
640 | /* |
641 | * before releasing the lock, we must take reference on sockets | |
642 | */ | |
643 | for (i = 0; i < count; i++) | |
644 | sock_hold(stack[i]); | |
645 | ||
645ca708 | 646 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
647 | |
648 | if (count) { | |
649 | flush_stack(stack, count, skb, count - 1); | |
650 | ||
651 | for (i = 0; i < count; i++) | |
652 | sock_put(stack[i]); | |
653 | } else { | |
654 | kfree_skb(skb); | |
655 | } | |
ba4e58ec | 656 | return 0; |
1da177e4 LT |
657 | } |
658 | ||
759e5d00 HX |
659 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
660 | int proto) | |
ba4e58ec | 661 | { |
759e5d00 HX |
662 | int err; |
663 | ||
664 | UDP_SKB_CB(skb)->partial_cov = 0; | |
665 | UDP_SKB_CB(skb)->cscov = skb->len; | |
666 | ||
db8dac20 | 667 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
668 | err = udplite_checksum_init(skb, uh); |
669 | if (err) | |
670 | return err; | |
671 | } | |
672 | ||
ba4e58ec GR |
673 | if (uh->check == 0) { |
674 | /* RFC 2460 section 8.1 says that we SHOULD log | |
675 | this error. Well, it is reasonable. | |
676 | */ | |
677 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
678 | return 1; | |
679 | } | |
680 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 681 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 682 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
683 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
684 | ||
60476372 | 685 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
686 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
687 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 688 | skb->len, proto, 0)); |
ba4e58ec | 689 | |
759e5d00 | 690 | return 0; |
ba4e58ec GR |
691 | } |
692 | ||
645ca708 | 693 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 694 | int proto) |
1da177e4 | 695 | { |
3ffe533c | 696 | struct net *net = dev_net(skb->dev); |
1da177e4 | 697 | struct sock *sk; |
1ab1457c | 698 | struct udphdr *uh; |
1da177e4 LT |
699 | struct in6_addr *saddr, *daddr; |
700 | u32 ulen = 0; | |
701 | ||
702 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 703 | goto discard; |
1da177e4 | 704 | |
0660e03f ACM |
705 | saddr = &ipv6_hdr(skb)->saddr; |
706 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 707 | uh = udp_hdr(skb); |
1da177e4 LT |
708 | |
709 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
710 | if (ulen > skb->len) |
711 | goto short_packet; | |
1da177e4 | 712 | |
759e5d00 HX |
713 | if (proto == IPPROTO_UDP) { |
714 | /* UDP validates ulen. */ | |
1da177e4 | 715 | |
ba4e58ec GR |
716 | /* Check for jumbo payload */ |
717 | if (ulen == 0) | |
718 | ulen = skb->len; | |
1da177e4 | 719 | |
ba4e58ec GR |
720 | if (ulen < sizeof(*uh)) |
721 | goto short_packet; | |
1da177e4 | 722 | |
ba4e58ec GR |
723 | if (ulen < skb->len) { |
724 | if (pskb_trim_rcsum(skb, ulen)) | |
725 | goto short_packet; | |
0660e03f ACM |
726 | saddr = &ipv6_hdr(skb)->saddr; |
727 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 728 | uh = udp_hdr(skb); |
ba4e58ec | 729 | } |
ba4e58ec | 730 | } |
1da177e4 | 731 | |
759e5d00 HX |
732 | if (udp6_csum_init(skb, uh, proto)) |
733 | goto discard; | |
734 | ||
1ab1457c YH |
735 | /* |
736 | * Multicast receive code | |
1da177e4 | 737 | */ |
ba4e58ec | 738 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
739 | return __udp6_lib_mcast_deliver(net, skb, |
740 | saddr, daddr, udptable); | |
1da177e4 LT |
741 | |
742 | /* Unicast */ | |
743 | ||
1ab1457c | 744 | /* |
1da177e4 LT |
745 | * check socket cache ... must talk to Alan about his plans |
746 | * for sock caches... i'll skip this for now. | |
747 | */ | |
607c4aaf | 748 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
749 | |
750 | if (sk == NULL) { | |
751 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
752 | goto discard; | |
753 | ||
ba4e58ec | 754 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 755 | goto discard; |
ef28d1a2 PE |
756 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
757 | proto == IPPROTO_UDPLITE); | |
1da177e4 | 758 | |
3ffe533c | 759 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
1da177e4 LT |
760 | |
761 | kfree_skb(skb); | |
add459aa | 762 | return 0; |
1da177e4 | 763 | } |
1ab1457c | 764 | |
1da177e4 | 765 | /* deliver */ |
1ab1457c | 766 | |
c377411f ED |
767 | if (sk_rcvqueues_full(sk, skb)) { |
768 | sock_put(sk); | |
769 | goto discard; | |
770 | } | |
d97106ea | 771 | bh_lock_sock(sk); |
95766fff HA |
772 | if (!sock_owned_by_user(sk)) |
773 | udpv6_queue_rcv_skb(sk, skb); | |
a3a858ff | 774 | else if (sk_add_backlog(sk, skb)) { |
55349790 ZY |
775 | atomic_inc(&sk->sk_drops); |
776 | bh_unlock_sock(sk); | |
777 | sock_put(sk); | |
778 | goto discard; | |
779 | } | |
95766fff | 780 | bh_unlock_sock(sk); |
1da177e4 | 781 | sock_put(sk); |
add459aa | 782 | return 0; |
1da177e4 | 783 | |
1ab1457c | 784 | short_packet: |
d6bc0149 | 785 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 786 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
787 | saddr, |
788 | ntohs(uh->source), | |
789 | ulen, | |
790 | skb->len, | |
791 | daddr, | |
792 | ntohs(uh->dest)); | |
1da177e4 LT |
793 | |
794 | discard: | |
ef28d1a2 | 795 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 796 | kfree_skb(skb); |
add459aa | 797 | return 0; |
1da177e4 | 798 | } |
ba4e58ec | 799 | |
e5bbef20 | 800 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 801 | { |
645ca708 | 802 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
803 | } |
804 | ||
1da177e4 LT |
805 | /* |
806 | * Throw away all pending data and cancel the corking. Socket is locked. | |
807 | */ | |
808 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
809 | { | |
810 | struct udp_sock *up = udp_sk(sk); | |
811 | ||
36d926b9 DL |
812 | if (up->pending == AF_INET) |
813 | udp_flush_pending_frames(sk); | |
814 | else if (up->pending) { | |
1da177e4 LT |
815 | up->len = 0; |
816 | up->pending = 0; | |
817 | ip6_flush_pending_frames(sk); | |
1ab1457c | 818 | } |
1da177e4 LT |
819 | } |
820 | ||
493c6be3 SS |
821 | /** |
822 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
823 | * @sk: socket we are sending on | |
824 | * @skb: sk_buff containing the filled-in UDP header | |
825 | * (checksum field must be zeroed out) | |
826 | */ | |
827 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
828 | const struct in6_addr *saddr, | |
829 | const struct in6_addr *daddr, int len) | |
830 | { | |
831 | unsigned int offset; | |
832 | struct udphdr *uh = udp_hdr(skb); | |
833 | __wsum csum = 0; | |
834 | ||
835 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
836 | /* Only one fragment on the socket. */ | |
837 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
838 | skb->csum_offset = offsetof(struct udphdr, check); | |
839 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
840 | } else { | |
841 | /* | |
842 | * HW-checksum won't work as there are two or more | |
843 | * fragments on the socket so that all csums of sk_buffs | |
844 | * should be together | |
845 | */ | |
846 | offset = skb_transport_offset(skb); | |
847 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
848 | ||
849 | skb->ip_summed = CHECKSUM_NONE; | |
850 | ||
851 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
852 | csum = csum_add(csum, skb->csum); | |
853 | } | |
854 | ||
855 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
856 | csum); | |
857 | if (uh->check == 0) | |
858 | uh->check = CSUM_MANGLED_0; | |
859 | } | |
860 | } | |
861 | ||
1da177e4 LT |
862 | /* |
863 | * Sending | |
864 | */ | |
865 | ||
4c0a6cb0 | 866 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
867 | { |
868 | struct sk_buff *skb; | |
869 | struct udphdr *uh; | |
4c0a6cb0 | 870 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
871 | struct inet_sock *inet = inet_sk(sk); |
872 | struct flowi *fl = &inet->cork.fl; | |
873 | int err = 0; | |
b2bf1e26 | 874 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 875 | __wsum csum = 0; |
1da177e4 LT |
876 | |
877 | /* Grab the skbuff where UDP header space exists. */ | |
878 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
879 | goto out; | |
880 | ||
881 | /* | |
882 | * Create a UDP header | |
883 | */ | |
4bedb452 | 884 | uh = udp_hdr(skb); |
1da177e4 LT |
885 | uh->source = fl->fl_ip_sport; |
886 | uh->dest = fl->fl_ip_dport; | |
887 | uh->len = htons(up->len); | |
888 | uh->check = 0; | |
889 | ||
b2bf1e26 | 890 | if (is_udplite) |
ba4e58ec | 891 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 SS |
892 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
893 | udp6_hwcsum_outgoing(sk, skb, &fl->fl6_src, &fl->fl6_dst, | |
894 | up->len); | |
895 | goto send; | |
896 | } else | |
ba4e58ec | 897 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 898 | |
ba4e58ec GR |
899 | /* add protocol-dependent pseudo-header */ |
900 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
901 | up->len, fl->proto, csum ); | |
1da177e4 | 902 | if (uh->check == 0) |
f6ab0288 | 903 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 904 | |
493c6be3 | 905 | send: |
1da177e4 | 906 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
907 | if (err) { |
908 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
909 | UDP6_INC_STATS_USER(sock_net(sk), | |
910 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
911 | err = 0; | |
912 | } | |
913 | } else | |
914 | UDP6_INC_STATS_USER(sock_net(sk), | |
915 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
916 | out: |
917 | up->len = 0; | |
918 | up->pending = 0; | |
919 | return err; | |
920 | } | |
921 | ||
ba4e58ec | 922 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
923 | struct msghdr *msg, size_t len) |
924 | { | |
925 | struct ipv6_txoptions opt_space; | |
926 | struct udp_sock *up = udp_sk(sk); | |
927 | struct inet_sock *inet = inet_sk(sk); | |
928 | struct ipv6_pinfo *np = inet6_sk(sk); | |
929 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 930 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
931 | struct ipv6_txoptions *opt = NULL; |
932 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 933 | struct flowi fl; |
1da177e4 LT |
934 | struct dst_entry *dst; |
935 | int addr_len = msg->msg_namelen; | |
936 | int ulen = len; | |
937 | int hlimit = -1; | |
41a1f8ea | 938 | int tclass = -1; |
13b52cd4 | 939 | int dontfrag = -1; |
1da177e4 LT |
940 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
941 | int err; | |
987905de | 942 | int connected = 0; |
b2bf1e26 | 943 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 944 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
945 | |
946 | /* destination address check */ | |
947 | if (sin6) { | |
948 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
949 | return -EINVAL; | |
950 | ||
951 | switch (sin6->sin6_family) { | |
952 | case AF_INET6: | |
953 | if (addr_len < SIN6_LEN_RFC2133) | |
954 | return -EINVAL; | |
955 | daddr = &sin6->sin6_addr; | |
956 | break; | |
957 | case AF_INET: | |
958 | goto do_udp_sendmsg; | |
959 | case AF_UNSPEC: | |
960 | msg->msg_name = sin6 = NULL; | |
961 | msg->msg_namelen = addr_len = 0; | |
962 | daddr = NULL; | |
963 | break; | |
964 | default: | |
965 | return -EINVAL; | |
966 | } | |
967 | } else if (!up->pending) { | |
968 | if (sk->sk_state != TCP_ESTABLISHED) | |
969 | return -EDESTADDRREQ; | |
970 | daddr = &np->daddr; | |
1ab1457c | 971 | } else |
1da177e4 LT |
972 | daddr = NULL; |
973 | ||
974 | if (daddr) { | |
e773e4fa | 975 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
976 | struct sockaddr_in sin; |
977 | sin.sin_family = AF_INET; | |
c720c7e8 | 978 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
979 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
980 | msg->msg_name = &sin; | |
981 | msg->msg_namelen = sizeof(sin); | |
982 | do_udp_sendmsg: | |
983 | if (__ipv6_only_sock(sk)) | |
984 | return -ENETUNREACH; | |
985 | return udp_sendmsg(iocb, sk, msg, len); | |
986 | } | |
987 | } | |
988 | ||
989 | if (up->pending == AF_INET) | |
990 | return udp_sendmsg(iocb, sk, msg, len); | |
991 | ||
992 | /* Rough check on arithmetic overflow, | |
b59e139b | 993 | better check is made in ip6_append_data(). |
1da177e4 LT |
994 | */ |
995 | if (len > INT_MAX - sizeof(struct udphdr)) | |
996 | return -EMSGSIZE; | |
1ab1457c | 997 | |
1da177e4 LT |
998 | if (up->pending) { |
999 | /* | |
1000 | * There are pending frames. | |
1001 | * The socket lock must be held while it's corked. | |
1002 | */ | |
1003 | lock_sock(sk); | |
1004 | if (likely(up->pending)) { | |
1005 | if (unlikely(up->pending != AF_INET6)) { | |
1006 | release_sock(sk); | |
1007 | return -EAFNOSUPPORT; | |
1008 | } | |
1009 | dst = NULL; | |
1010 | goto do_append_data; | |
1011 | } | |
1012 | release_sock(sk); | |
1013 | } | |
1014 | ulen += sizeof(struct udphdr); | |
1015 | ||
132a55f3 | 1016 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
1017 | |
1018 | if (sin6) { | |
1019 | if (sin6->sin6_port == 0) | |
1020 | return -EINVAL; | |
1021 | ||
132a55f3 | 1022 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
1023 | daddr = &sin6->sin6_addr; |
1024 | ||
1025 | if (np->sndflow) { | |
132a55f3 HX |
1026 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1027 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
1028 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1029 | if (flowlabel == NULL) |
1030 | return -EINVAL; | |
1031 | daddr = &flowlabel->dst; | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Otherwise it will be difficult to maintain | |
1037 | * sk->sk_dst_cache. | |
1038 | */ | |
1039 | if (sk->sk_state == TCP_ESTABLISHED && | |
1040 | ipv6_addr_equal(daddr, &np->daddr)) | |
1041 | daddr = &np->daddr; | |
1042 | ||
1043 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1044 | sin6->sin6_scope_id && | |
1045 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 1046 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
1047 | } else { |
1048 | if (sk->sk_state != TCP_ESTABLISHED) | |
1049 | return -EDESTADDRREQ; | |
1050 | ||
c720c7e8 | 1051 | fl.fl_ip_dport = inet->inet_dport; |
1da177e4 | 1052 | daddr = &np->daddr; |
132a55f3 | 1053 | fl.fl6_flowlabel = np->flow_label; |
987905de | 1054 | connected = 1; |
1da177e4 LT |
1055 | } |
1056 | ||
132a55f3 HX |
1057 | if (!fl.oif) |
1058 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 | 1059 | |
9f690db7 YH |
1060 | if (!fl.oif) |
1061 | fl.oif = np->sticky_pktinfo.ipi6_ifindex; | |
1062 | ||
51953d5b BH |
1063 | fl.mark = sk->sk_mark; |
1064 | ||
1da177e4 LT |
1065 | if (msg->msg_controllen) { |
1066 | opt = &opt_space; | |
1067 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1068 | opt->tot_len = sizeof(*opt); | |
1069 | ||
13b52cd4 BH |
1070 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, |
1071 | &tclass, &dontfrag); | |
1da177e4 LT |
1072 | if (err < 0) { |
1073 | fl6_sock_release(flowlabel); | |
1074 | return err; | |
1075 | } | |
132a55f3 HX |
1076 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1077 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1078 | if (flowlabel == NULL) |
1079 | return -EINVAL; | |
1080 | } | |
1081 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1082 | opt = NULL; | |
987905de | 1083 | connected = 0; |
1da177e4 LT |
1084 | } |
1085 | if (opt == NULL) | |
1086 | opt = np->opt; | |
df9890c3 YH |
1087 | if (flowlabel) |
1088 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1089 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1090 | |
ba4e58ec | 1091 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
1092 | if (!ipv6_addr_any(daddr)) |
1093 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
1094 | else | |
1095 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
1096 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
1097 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
c720c7e8 | 1098 | fl.fl_ip_sport = inet->inet_sport; |
1ab1457c | 1099 | |
20c59de2 AE |
1100 | final_p = fl6_update_dst(&fl, opt, &final); |
1101 | if (final_p) | |
987905de | 1102 | connected = 0; |
1da177e4 | 1103 | |
132a55f3 HX |
1104 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
1105 | fl.oif = np->mcast_oif; | |
987905de MK |
1106 | connected = 0; |
1107 | } | |
1da177e4 | 1108 | |
132a55f3 | 1109 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 1110 | |
132a55f3 | 1111 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
1112 | if (err) |
1113 | goto out; | |
1114 | if (final_p) | |
132a55f3 | 1115 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 1116 | |
52479b62 AD |
1117 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
1118 | if (err < 0) { | |
14e50e57 DM |
1119 | if (err == -EREMOTE) |
1120 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
1121 | if (err < 0) | |
1122 | goto out; | |
1123 | } | |
1da177e4 LT |
1124 | |
1125 | if (hlimit < 0) { | |
132a55f3 | 1126 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
1127 | hlimit = np->mcast_hops; |
1128 | else | |
1129 | hlimit = np->hop_limit; | |
1130 | if (hlimit < 0) | |
6b75d090 | 1131 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1132 | } |
1133 | ||
e651f03a | 1134 | if (tclass < 0) |
41a1f8ea | 1135 | tclass = np->tclass; |
41a1f8ea | 1136 | |
13b52cd4 BH |
1137 | if (dontfrag < 0) |
1138 | dontfrag = np->dontfrag; | |
1139 | ||
1da177e4 LT |
1140 | if (msg->msg_flags&MSG_CONFIRM) |
1141 | goto do_confirm; | |
1142 | back_from_confirm: | |
1143 | ||
1144 | lock_sock(sk); | |
1145 | if (unlikely(up->pending)) { | |
1146 | /* The socket is already corked while preparing it. */ | |
1147 | /* ... which is an evident application bug. --ANK */ | |
1148 | release_sock(sk); | |
1149 | ||
64ce2073 | 1150 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1151 | err = -EINVAL; |
1152 | goto out; | |
1153 | } | |
1154 | ||
1155 | up->pending = AF_INET6; | |
1156 | ||
1157 | do_append_data: | |
1158 | up->len += ulen; | |
ba4e58ec GR |
1159 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1160 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 1161 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea | 1162 | (struct rt6_info*)dst, |
13b52cd4 | 1163 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1164 | if (err) |
1165 | udp_v6_flush_pending_frames(sk); | |
1166 | else if (!corkreq) | |
4c0a6cb0 | 1167 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1168 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1169 | up->pending = 0; | |
1da177e4 | 1170 | |
a5e7c210 DM |
1171 | if (dst) { |
1172 | if (connected) { | |
1173 | ip6_dst_store(sk, dst, | |
132a55f3 | 1174 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
1175 | &np->daddr : NULL, |
1176 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 1177 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
1178 | &np->saddr : |
1179 | #endif | |
1180 | NULL); | |
a5e7c210 DM |
1181 | } else { |
1182 | dst_release(dst); | |
1183 | } | |
a3c96089 | 1184 | dst = NULL; |
a5e7c210 DM |
1185 | } |
1186 | ||
1da177e4 LT |
1187 | if (err > 0) |
1188 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1189 | release_sock(sk); | |
1190 | out: | |
a3c96089 | 1191 | dst_release(dst); |
1da177e4 | 1192 | fl6_sock_release(flowlabel); |
cd562c98 | 1193 | if (!err) |
1da177e4 | 1194 | return len; |
a18135eb DM |
1195 | /* |
1196 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1197 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1198 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1199 | * things). We could add another new stat but at least for now that | |
1200 | * seems like overkill. | |
1201 | */ | |
1202 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1203 | UDP6_INC_STATS_USER(sock_net(sk), |
1204 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1205 | } |
1da177e4 LT |
1206 | return err; |
1207 | ||
1208 | do_confirm: | |
1209 | dst_confirm(dst); | |
1210 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1211 | goto back_from_confirm; | |
1212 | err = 0; | |
1213 | goto out; | |
1214 | } | |
1215 | ||
7d06b2e0 | 1216 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
1217 | { |
1218 | lock_sock(sk); | |
1219 | udp_v6_flush_pending_frames(sk); | |
1220 | release_sock(sk); | |
1221 | ||
1222 | inet6_destroy_sock(sk); | |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | /* | |
1226 | * Socket option code for UDP | |
1227 | */ | |
ba4e58ec | 1228 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1229 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1230 | { |
db8dac20 | 1231 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1232 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1233 | udp_v6_push_pending_frames); | |
ba4e58ec | 1234 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1235 | } |
1236 | ||
1237 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1238 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1239 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1240 | { |
db8dac20 | 1241 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1242 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1243 | udp_v6_push_pending_frames); | |
ba4e58ec | 1244 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1245 | } |
1246 | #endif | |
1247 | ||
ba4e58ec GR |
1248 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1249 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1250 | { |
db8dac20 | 1251 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1252 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1253 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1254 | } |
1255 | ||
1256 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1257 | int compat_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 compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1263 | } |
1264 | #endif | |
1265 | ||
ba735425 SS |
1266 | static int udp6_ufo_send_check(struct sk_buff *skb) |
1267 | { | |
1268 | struct ipv6hdr *ipv6h; | |
1269 | struct udphdr *uh; | |
1270 | ||
1271 | if (!pskb_may_pull(skb, sizeof(*uh))) | |
1272 | return -EINVAL; | |
1273 | ||
1274 | ipv6h = ipv6_hdr(skb); | |
1275 | uh = udp_hdr(skb); | |
1276 | ||
1277 | uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, | |
1278 | IPPROTO_UDP, 0); | |
1279 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
1280 | skb->csum_offset = offsetof(struct udphdr, check); | |
1281 | skb->ip_summed = CHECKSUM_PARTIAL; | |
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features) | |
1286 | { | |
1287 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
1288 | unsigned int mss; | |
1289 | unsigned int unfrag_ip6hlen, unfrag_len; | |
1290 | struct frag_hdr *fptr; | |
1291 | u8 *mac_start, *prevhdr; | |
1292 | u8 nexthdr; | |
1293 | u8 frag_hdr_sz = sizeof(struct frag_hdr); | |
1294 | int offset; | |
1295 | __wsum csum; | |
1296 | ||
1297 | mss = skb_shinfo(skb)->gso_size; | |
1298 | if (unlikely(skb->len <= mss)) | |
1299 | goto out; | |
1300 | ||
1301 | if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { | |
1302 | /* Packet is from an untrusted source, reset gso_segs. */ | |
1303 | int type = skb_shinfo(skb)->gso_type; | |
1304 | ||
1305 | if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || | |
1306 | !(type & (SKB_GSO_UDP)))) | |
1307 | goto out; | |
1308 | ||
1309 | skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); | |
1310 | ||
1311 | segs = NULL; | |
1312 | goto out; | |
1313 | } | |
1314 | ||
1315 | /* Do software UFO. Complete and fill in the UDP checksum as HW cannot | |
1316 | * do checksum of UDP packets sent as multiple IP fragments. | |
1317 | */ | |
1318 | offset = skb->csum_start - skb_headroom(skb); | |
1319 | csum = skb_checksum(skb, offset, skb->len- offset, 0); | |
1320 | offset += skb->csum_offset; | |
1321 | *(__sum16 *)(skb->data + offset) = csum_fold(csum); | |
1322 | skb->ip_summed = CHECKSUM_NONE; | |
1323 | ||
1324 | /* Check if there is enough headroom to insert fragment header. */ | |
1325 | if ((skb_headroom(skb) < frag_hdr_sz) && | |
1326 | pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) | |
1327 | goto out; | |
1328 | ||
1329 | /* Find the unfragmentable header and shift it left by frag_hdr_sz | |
1330 | * bytes to insert fragment header. | |
1331 | */ | |
1332 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
1333 | nexthdr = *prevhdr; | |
1334 | *prevhdr = NEXTHDR_FRAGMENT; | |
1335 | unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + | |
1336 | unfrag_ip6hlen; | |
1337 | mac_start = skb_mac_header(skb); | |
1338 | memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); | |
1339 | ||
1340 | skb->mac_header -= frag_hdr_sz; | |
1341 | skb->network_header -= frag_hdr_sz; | |
1342 | ||
1343 | fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); | |
1344 | fptr->nexthdr = nexthdr; | |
1345 | fptr->reserved = 0; | |
1346 | ipv6_select_ident(fptr); | |
1347 | ||
1348 | /* Fragment the skb. ipv6 header and the remaining fields of the | |
1349 | * fragment header are updated in ipv6_gso_segment() | |
1350 | */ | |
1351 | segs = skb_segment(skb, features); | |
1352 | ||
1353 | out: | |
1354 | return segs; | |
1355 | } | |
1356 | ||
41135cc8 | 1357 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1358 | .handler = udpv6_rcv, |
1359 | .err_handler = udpv6_err, | |
ba735425 SS |
1360 | .gso_send_check = udp6_ufo_send_check, |
1361 | .gso_segment = udp6_ufo_fragment, | |
1da177e4 LT |
1362 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
1363 | }; | |
1364 | ||
1365 | /* ------------------------------------------------------------------------ */ | |
1366 | #ifdef CONFIG_PROC_FS | |
1367 | ||
1368 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1369 | { | |
1370 | struct inet_sock *inet = inet_sk(sp); | |
1371 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1372 | struct in6_addr *dest, *src; | |
1373 | __u16 destp, srcp; | |
1374 | ||
1375 | dest = &np->daddr; | |
1376 | src = &np->rcv_saddr; | |
c720c7e8 ED |
1377 | destp = ntohs(inet->inet_dport); |
1378 | srcp = ntohs(inet->inet_sport); | |
1da177e4 | 1379 | seq_printf(seq, |
f86dcc5a | 1380 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
cb61cb9b | 1381 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1382 | bucket, |
1383 | src->s6_addr32[0], src->s6_addr32[1], | |
1384 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1385 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1386 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1387 | sp->sk_state, |
31e6d363 ED |
1388 | sk_wmem_alloc_get(sp), |
1389 | sk_rmem_alloc_get(sp), | |
1da177e4 LT |
1390 | 0, 0L, 0, |
1391 | sock_i_uid(sp), 0, | |
1392 | sock_i_ino(sp), | |
cb61cb9b ED |
1393 | atomic_read(&sp->sk_refcnt), sp, |
1394 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1395 | } |
1396 | ||
ba4e58ec | 1397 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1398 | { |
1399 | if (v == SEQ_START_TOKEN) | |
1400 | seq_printf(seq, | |
1401 | " sl " | |
1402 | "local_address " | |
1403 | "remote_address " | |
1404 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1405 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1406 | else |
1407 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1408 | return 0; | |
1409 | } | |
1410 | ||
1da177e4 | 1411 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1412 | .name = "udp6", |
1413 | .family = AF_INET6, | |
645ca708 | 1414 | .udp_table = &udp_table, |
4ad96d39 DL |
1415 | .seq_fops = { |
1416 | .owner = THIS_MODULE, | |
1417 | }, | |
dda61925 DL |
1418 | .seq_ops = { |
1419 | .show = udp6_seq_show, | |
1420 | }, | |
1da177e4 LT |
1421 | }; |
1422 | ||
2c8c1e72 | 1423 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1424 | { |
0c96d8c5 | 1425 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1426 | } |
1427 | ||
0c96d8c5 DL |
1428 | void udp6_proc_exit(struct net *net) { |
1429 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1430 | } |
1431 | #endif /* CONFIG_PROC_FS */ | |
1432 | ||
1433 | /* ------------------------------------------------------------------------ */ | |
1434 | ||
1435 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1436 | .name = "UDPv6", |
1437 | .owner = THIS_MODULE, | |
ba4e58ec | 1438 | .close = udp_lib_close, |
543d9cfe ACM |
1439 | .connect = ip6_datagram_connect, |
1440 | .disconnect = udp_disconnect, | |
1441 | .ioctl = udp_ioctl, | |
1442 | .destroy = udpv6_destroy_sock, | |
1443 | .setsockopt = udpv6_setsockopt, | |
1444 | .getsockopt = udpv6_getsockopt, | |
1445 | .sendmsg = udpv6_sendmsg, | |
1446 | .recvmsg = udpv6_recvmsg, | |
1447 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1448 | .hash = udp_lib_hash, |
1449 | .unhash = udp_lib_unhash, | |
543d9cfe | 1450 | .get_port = udp_v6_get_port, |
95766fff HA |
1451 | .memory_allocated = &udp_memory_allocated, |
1452 | .sysctl_mem = sysctl_udp_mem, | |
1453 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1454 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1455 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1456 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1457 | .h.udp_table = &udp_table, |
3fdadf7d | 1458 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1459 | .compat_setsockopt = compat_udpv6_setsockopt, |
1460 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1461 | #endif |
1da177e4 LT |
1462 | }; |
1463 | ||
1da177e4 LT |
1464 | static struct inet_protosw udpv6_protosw = { |
1465 | .type = SOCK_DGRAM, | |
1466 | .protocol = IPPROTO_UDP, | |
1467 | .prot = &udpv6_prot, | |
1468 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1469 | .no_check = UDP_CSUM_DEFAULT, |
1470 | .flags = INET_PROTOSW_PERMANENT, | |
1471 | }; | |
1472 | ||
1473 | ||
7f4e4868 | 1474 | int __init udpv6_init(void) |
1da177e4 | 1475 | { |
7f4e4868 DL |
1476 | int ret; |
1477 | ||
1478 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1479 | if (ret) | |
1480 | goto out; | |
1481 | ||
1482 | ret = inet6_register_protosw(&udpv6_protosw); | |
1483 | if (ret) | |
1484 | goto out_udpv6_protocol; | |
1485 | out: | |
1486 | return ret; | |
1487 | ||
1488 | out_udpv6_protocol: | |
1489 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1490 | goto out; | |
1491 | } | |
1492 | ||
09f7709f | 1493 | void udpv6_exit(void) |
7f4e4868 DL |
1494 | { |
1495 | inet6_unregister_protosw(&udpv6_protosw); | |
1496 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1497 | } |