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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 | ||
29030374 ED |
469 | if (np->recverr) { |
470 | bh_lock_sock(sk); | |
1da177e4 | 471 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
29030374 ED |
472 | bh_unlock_sock(sk); |
473 | } | |
1da177e4 LT |
474 | sk->sk_err = err; |
475 | sk->sk_error_report(sk); | |
476 | out: | |
477 | sock_put(sk); | |
478 | } | |
479 | ||
ba4e58ec | 480 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
481 | struct inet6_skb_parm *opt, u8 type, |
482 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 483 | { |
645ca708 | 484 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
485 | } |
486 | ||
487 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 488 | { |
ba4e58ec | 489 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 490 | int rc; |
b2bf1e26 | 491 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 492 | |
ba4e58ec GR |
493 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
494 | goto drop; | |
1da177e4 | 495 | |
ba4e58ec GR |
496 | /* |
497 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
498 | */ | |
b2bf1e26 | 499 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
500 | |
501 | if (up->pcrlen == 0) { /* full coverage was set */ | |
502 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
503 | " %d while full coverage %d requested\n", | |
504 | UDP_SKB_CB(skb)->cscov, skb->len); | |
505 | goto drop; | |
506 | } | |
507 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
508 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
509 | "too small, need min %d\n", | |
510 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
511 | goto drop; | |
512 | } | |
1da177e4 LT |
513 | } |
514 | ||
1ab6eb62 HX |
515 | if (sk->sk_filter) { |
516 | if (udp_lib_checksum_complete(skb)) | |
517 | goto drop; | |
518 | } | |
ba4e58ec | 519 | |
f84af32c | 520 | if ((rc = ip_queue_rcv_skb(sk, skb)) < 0) { |
a18135eb | 521 | /* Note that an ENOMEM error is charged twice */ |
766e9037 | 522 | if (rc == -ENOMEM) |
ef28d1a2 PE |
523 | UDP6_INC_STATS_BH(sock_net(sk), |
524 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
8edf19c2 | 525 | goto drop_no_sk_drops_inc; |
1da177e4 | 526 | } |
cb75994e | 527 | |
1da177e4 | 528 | return 0; |
ba4e58ec | 529 | drop: |
8edf19c2 ED |
530 | atomic_inc(&sk->sk_drops); |
531 | drop_no_sk_drops_inc: | |
ef28d1a2 | 532 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
533 | kfree_skb(skb); |
534 | return -1; | |
1da177e4 LT |
535 | } |
536 | ||
920a4611 | 537 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
e69a4adc AV |
538 | __be16 loc_port, struct in6_addr *loc_addr, |
539 | __be16 rmt_port, struct in6_addr *rmt_addr, | |
1da177e4 LT |
540 | int dif) |
541 | { | |
88ab1932 | 542 | struct hlist_nulls_node *node; |
1da177e4 LT |
543 | struct sock *s = sk; |
544 | unsigned short num = ntohs(loc_port); | |
545 | ||
88ab1932 | 546 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
547 | struct inet_sock *inet = inet_sk(s); |
548 | ||
920a4611 | 549 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
550 | continue; |
551 | ||
d4cada4a ED |
552 | if (udp_sk(s)->udp_port_hash == num && |
553 | s->sk_family == PF_INET6) { | |
1da177e4 | 554 | struct ipv6_pinfo *np = inet6_sk(s); |
c720c7e8 ED |
555 | if (inet->inet_dport) { |
556 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
557 | continue; |
558 | } | |
559 | if (!ipv6_addr_any(&np->daddr) && | |
560 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
561 | continue; | |
562 | ||
563 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
564 | continue; | |
565 | ||
566 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
567 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
568 | continue; | |
1da177e4 | 569 | } |
add459aa | 570 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
571 | continue; |
572 | return s; | |
573 | } | |
574 | } | |
575 | return NULL; | |
576 | } | |
577 | ||
a1ab77f9 ED |
578 | static void flush_stack(struct sock **stack, unsigned int count, |
579 | struct sk_buff *skb, unsigned int final) | |
580 | { | |
581 | unsigned int i; | |
582 | struct sock *sk; | |
583 | struct sk_buff *skb1; | |
584 | ||
585 | for (i = 0; i < count; i++) { | |
586 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
587 | ||
f6b8f32c | 588 | sk = stack[i]; |
a1ab77f9 | 589 | if (skb1) { |
c377411f ED |
590 | if (sk_rcvqueues_full(sk, skb)) { |
591 | kfree_skb(skb1); | |
592 | goto drop; | |
593 | } | |
a1ab77f9 ED |
594 | bh_lock_sock(sk); |
595 | if (!sock_owned_by_user(sk)) | |
596 | udpv6_queue_rcv_skb(sk, skb1); | |
a3a858ff | 597 | else if (sk_add_backlog(sk, skb1)) { |
55349790 ZY |
598 | kfree_skb(skb1); |
599 | bh_unlock_sock(sk); | |
600 | goto drop; | |
601 | } | |
a1ab77f9 | 602 | bh_unlock_sock(sk); |
55349790 | 603 | continue; |
a1ab77f9 | 604 | } |
55349790 ZY |
605 | drop: |
606 | atomic_inc(&sk->sk_drops); | |
607 | UDP6_INC_STATS_BH(sock_net(sk), | |
608 | UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); | |
609 | UDP6_INC_STATS_BH(sock_net(sk), | |
610 | UDP_MIB_INERRORS, IS_UDPLITE(sk)); | |
a1ab77f9 ED |
611 | } |
612 | } | |
1da177e4 LT |
613 | /* |
614 | * Note: called only from the BH handler context, | |
615 | * so we don't need to lock the hashes. | |
616 | */ | |
e3163493 PE |
617 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
618 | struct in6_addr *saddr, struct in6_addr *daddr, | |
645ca708 | 619 | struct udp_table *udptable) |
1da177e4 | 620 | { |
a1ab77f9 | 621 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 622 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 623 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 624 | int dif; |
a1ab77f9 | 625 | unsigned int i, count = 0; |
1da177e4 | 626 | |
645ca708 | 627 | spin_lock(&hslot->lock); |
88ab1932 | 628 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 629 | dif = inet6_iif(skb); |
920a4611 | 630 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
631 | while (sk) { |
632 | stack[count++] = sk; | |
633 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
634 | uh->source, saddr, dif); | |
635 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
636 | if (!sk) | |
637 | break; | |
638 | flush_stack(stack, count, skb, ~0); | |
639 | count = 0; | |
95766fff | 640 | } |
1da177e4 | 641 | } |
a1ab77f9 ED |
642 | /* |
643 | * before releasing the lock, we must take reference on sockets | |
644 | */ | |
645 | for (i = 0; i < count; i++) | |
646 | sock_hold(stack[i]); | |
647 | ||
645ca708 | 648 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
649 | |
650 | if (count) { | |
651 | flush_stack(stack, count, skb, count - 1); | |
652 | ||
653 | for (i = 0; i < count; i++) | |
654 | sock_put(stack[i]); | |
655 | } else { | |
656 | kfree_skb(skb); | |
657 | } | |
ba4e58ec | 658 | return 0; |
1da177e4 LT |
659 | } |
660 | ||
759e5d00 HX |
661 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
662 | int proto) | |
ba4e58ec | 663 | { |
759e5d00 HX |
664 | int err; |
665 | ||
666 | UDP_SKB_CB(skb)->partial_cov = 0; | |
667 | UDP_SKB_CB(skb)->cscov = skb->len; | |
668 | ||
db8dac20 | 669 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
670 | err = udplite_checksum_init(skb, uh); |
671 | if (err) | |
672 | return err; | |
673 | } | |
674 | ||
ba4e58ec GR |
675 | if (uh->check == 0) { |
676 | /* RFC 2460 section 8.1 says that we SHOULD log | |
677 | this error. Well, it is reasonable. | |
678 | */ | |
679 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
680 | return 1; | |
681 | } | |
682 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 683 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 684 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
685 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
686 | ||
60476372 | 687 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
688 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
689 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 690 | skb->len, proto, 0)); |
ba4e58ec | 691 | |
759e5d00 | 692 | return 0; |
ba4e58ec GR |
693 | } |
694 | ||
645ca708 | 695 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 696 | int proto) |
1da177e4 | 697 | { |
3ffe533c | 698 | struct net *net = dev_net(skb->dev); |
1da177e4 | 699 | struct sock *sk; |
1ab1457c | 700 | struct udphdr *uh; |
1da177e4 LT |
701 | struct in6_addr *saddr, *daddr; |
702 | u32 ulen = 0; | |
703 | ||
704 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 705 | goto discard; |
1da177e4 | 706 | |
0660e03f ACM |
707 | saddr = &ipv6_hdr(skb)->saddr; |
708 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 709 | uh = udp_hdr(skb); |
1da177e4 LT |
710 | |
711 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
712 | if (ulen > skb->len) |
713 | goto short_packet; | |
1da177e4 | 714 | |
759e5d00 HX |
715 | if (proto == IPPROTO_UDP) { |
716 | /* UDP validates ulen. */ | |
1da177e4 | 717 | |
ba4e58ec GR |
718 | /* Check for jumbo payload */ |
719 | if (ulen == 0) | |
720 | ulen = skb->len; | |
1da177e4 | 721 | |
ba4e58ec GR |
722 | if (ulen < sizeof(*uh)) |
723 | goto short_packet; | |
1da177e4 | 724 | |
ba4e58ec GR |
725 | if (ulen < skb->len) { |
726 | if (pskb_trim_rcsum(skb, ulen)) | |
727 | goto short_packet; | |
0660e03f ACM |
728 | saddr = &ipv6_hdr(skb)->saddr; |
729 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 730 | uh = udp_hdr(skb); |
ba4e58ec | 731 | } |
ba4e58ec | 732 | } |
1da177e4 | 733 | |
759e5d00 HX |
734 | if (udp6_csum_init(skb, uh, proto)) |
735 | goto discard; | |
736 | ||
1ab1457c YH |
737 | /* |
738 | * Multicast receive code | |
1da177e4 | 739 | */ |
ba4e58ec | 740 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
741 | return __udp6_lib_mcast_deliver(net, skb, |
742 | saddr, daddr, udptable); | |
1da177e4 LT |
743 | |
744 | /* Unicast */ | |
745 | ||
1ab1457c | 746 | /* |
1da177e4 LT |
747 | * check socket cache ... must talk to Alan about his plans |
748 | * for sock caches... i'll skip this for now. | |
749 | */ | |
607c4aaf | 750 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
751 | |
752 | if (sk == NULL) { | |
753 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
754 | goto discard; | |
755 | ||
ba4e58ec | 756 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 757 | goto discard; |
ef28d1a2 PE |
758 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
759 | proto == IPPROTO_UDPLITE); | |
1da177e4 | 760 | |
3ffe533c | 761 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
1da177e4 LT |
762 | |
763 | kfree_skb(skb); | |
add459aa | 764 | return 0; |
1da177e4 | 765 | } |
1ab1457c | 766 | |
1da177e4 | 767 | /* deliver */ |
1ab1457c | 768 | |
c377411f ED |
769 | if (sk_rcvqueues_full(sk, skb)) { |
770 | sock_put(sk); | |
771 | goto discard; | |
772 | } | |
d97106ea | 773 | bh_lock_sock(sk); |
95766fff HA |
774 | if (!sock_owned_by_user(sk)) |
775 | udpv6_queue_rcv_skb(sk, skb); | |
a3a858ff | 776 | else if (sk_add_backlog(sk, skb)) { |
55349790 ZY |
777 | atomic_inc(&sk->sk_drops); |
778 | bh_unlock_sock(sk); | |
779 | sock_put(sk); | |
780 | goto discard; | |
781 | } | |
95766fff | 782 | bh_unlock_sock(sk); |
1da177e4 | 783 | sock_put(sk); |
add459aa | 784 | return 0; |
1da177e4 | 785 | |
1ab1457c | 786 | short_packet: |
d6bc0149 | 787 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 788 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
789 | saddr, |
790 | ntohs(uh->source), | |
791 | ulen, | |
792 | skb->len, | |
793 | daddr, | |
794 | ntohs(uh->dest)); | |
1da177e4 LT |
795 | |
796 | discard: | |
ef28d1a2 | 797 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 798 | kfree_skb(skb); |
add459aa | 799 | return 0; |
1da177e4 | 800 | } |
ba4e58ec | 801 | |
e5bbef20 | 802 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 803 | { |
645ca708 | 804 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
805 | } |
806 | ||
1da177e4 LT |
807 | /* |
808 | * Throw away all pending data and cancel the corking. Socket is locked. | |
809 | */ | |
810 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
811 | { | |
812 | struct udp_sock *up = udp_sk(sk); | |
813 | ||
36d926b9 DL |
814 | if (up->pending == AF_INET) |
815 | udp_flush_pending_frames(sk); | |
816 | else if (up->pending) { | |
1da177e4 LT |
817 | up->len = 0; |
818 | up->pending = 0; | |
819 | ip6_flush_pending_frames(sk); | |
1ab1457c | 820 | } |
1da177e4 LT |
821 | } |
822 | ||
493c6be3 SS |
823 | /** |
824 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
825 | * @sk: socket we are sending on | |
826 | * @skb: sk_buff containing the filled-in UDP header | |
827 | * (checksum field must be zeroed out) | |
828 | */ | |
829 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
830 | const struct in6_addr *saddr, | |
831 | const struct in6_addr *daddr, int len) | |
832 | { | |
833 | unsigned int offset; | |
834 | struct udphdr *uh = udp_hdr(skb); | |
835 | __wsum csum = 0; | |
836 | ||
837 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
838 | /* Only one fragment on the socket. */ | |
839 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
840 | skb->csum_offset = offsetof(struct udphdr, check); | |
841 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
842 | } else { | |
843 | /* | |
844 | * HW-checksum won't work as there are two or more | |
845 | * fragments on the socket so that all csums of sk_buffs | |
846 | * should be together | |
847 | */ | |
848 | offset = skb_transport_offset(skb); | |
849 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
850 | ||
851 | skb->ip_summed = CHECKSUM_NONE; | |
852 | ||
853 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
854 | csum = csum_add(csum, skb->csum); | |
855 | } | |
856 | ||
857 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
858 | csum); | |
859 | if (uh->check == 0) | |
860 | uh->check = CSUM_MANGLED_0; | |
861 | } | |
862 | } | |
863 | ||
1da177e4 LT |
864 | /* |
865 | * Sending | |
866 | */ | |
867 | ||
4c0a6cb0 | 868 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
869 | { |
870 | struct sk_buff *skb; | |
871 | struct udphdr *uh; | |
4c0a6cb0 | 872 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
873 | struct inet_sock *inet = inet_sk(sk); |
874 | struct flowi *fl = &inet->cork.fl; | |
875 | int err = 0; | |
b2bf1e26 | 876 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 877 | __wsum csum = 0; |
1da177e4 LT |
878 | |
879 | /* Grab the skbuff where UDP header space exists. */ | |
880 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
881 | goto out; | |
882 | ||
883 | /* | |
884 | * Create a UDP header | |
885 | */ | |
4bedb452 | 886 | uh = udp_hdr(skb); |
1da177e4 LT |
887 | uh->source = fl->fl_ip_sport; |
888 | uh->dest = fl->fl_ip_dport; | |
889 | uh->len = htons(up->len); | |
890 | uh->check = 0; | |
891 | ||
b2bf1e26 | 892 | if (is_udplite) |
ba4e58ec | 893 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 SS |
894 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
895 | udp6_hwcsum_outgoing(sk, skb, &fl->fl6_src, &fl->fl6_dst, | |
896 | up->len); | |
897 | goto send; | |
898 | } else | |
ba4e58ec | 899 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 900 | |
ba4e58ec GR |
901 | /* add protocol-dependent pseudo-header */ |
902 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, | |
903 | up->len, fl->proto, csum ); | |
1da177e4 | 904 | if (uh->check == 0) |
f6ab0288 | 905 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 906 | |
493c6be3 | 907 | send: |
1da177e4 | 908 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
909 | if (err) { |
910 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
911 | UDP6_INC_STATS_USER(sock_net(sk), | |
912 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
913 | err = 0; | |
914 | } | |
915 | } else | |
916 | UDP6_INC_STATS_USER(sock_net(sk), | |
917 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
918 | out: |
919 | up->len = 0; | |
920 | up->pending = 0; | |
921 | return err; | |
922 | } | |
923 | ||
ba4e58ec | 924 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
925 | struct msghdr *msg, size_t len) |
926 | { | |
927 | struct ipv6_txoptions opt_space; | |
928 | struct udp_sock *up = udp_sk(sk); | |
929 | struct inet_sock *inet = inet_sk(sk); | |
930 | struct ipv6_pinfo *np = inet6_sk(sk); | |
931 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
932 | struct in6_addr *daddr, *final_p = NULL, final; | |
933 | struct ipv6_txoptions *opt = NULL; | |
934 | struct ip6_flowlabel *flowlabel = NULL; | |
132a55f3 | 935 | struct flowi fl; |
1da177e4 LT |
936 | struct dst_entry *dst; |
937 | int addr_len = msg->msg_namelen; | |
938 | int ulen = len; | |
939 | int hlimit = -1; | |
41a1f8ea | 940 | int tclass = -1; |
13b52cd4 | 941 | int dontfrag = -1; |
1da177e4 LT |
942 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
943 | int err; | |
987905de | 944 | int connected = 0; |
b2bf1e26 | 945 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 946 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
947 | |
948 | /* destination address check */ | |
949 | if (sin6) { | |
950 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
951 | return -EINVAL; | |
952 | ||
953 | switch (sin6->sin6_family) { | |
954 | case AF_INET6: | |
955 | if (addr_len < SIN6_LEN_RFC2133) | |
956 | return -EINVAL; | |
957 | daddr = &sin6->sin6_addr; | |
958 | break; | |
959 | case AF_INET: | |
960 | goto do_udp_sendmsg; | |
961 | case AF_UNSPEC: | |
962 | msg->msg_name = sin6 = NULL; | |
963 | msg->msg_namelen = addr_len = 0; | |
964 | daddr = NULL; | |
965 | break; | |
966 | default: | |
967 | return -EINVAL; | |
968 | } | |
969 | } else if (!up->pending) { | |
970 | if (sk->sk_state != TCP_ESTABLISHED) | |
971 | return -EDESTADDRREQ; | |
972 | daddr = &np->daddr; | |
1ab1457c | 973 | } else |
1da177e4 LT |
974 | daddr = NULL; |
975 | ||
976 | if (daddr) { | |
e773e4fa | 977 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
978 | struct sockaddr_in sin; |
979 | sin.sin_family = AF_INET; | |
c720c7e8 | 980 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
981 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
982 | msg->msg_name = &sin; | |
983 | msg->msg_namelen = sizeof(sin); | |
984 | do_udp_sendmsg: | |
985 | if (__ipv6_only_sock(sk)) | |
986 | return -ENETUNREACH; | |
987 | return udp_sendmsg(iocb, sk, msg, len); | |
988 | } | |
989 | } | |
990 | ||
991 | if (up->pending == AF_INET) | |
992 | return udp_sendmsg(iocb, sk, msg, len); | |
993 | ||
994 | /* Rough check on arithmetic overflow, | |
b59e139b | 995 | better check is made in ip6_append_data(). |
1da177e4 LT |
996 | */ |
997 | if (len > INT_MAX - sizeof(struct udphdr)) | |
998 | return -EMSGSIZE; | |
1ab1457c | 999 | |
1da177e4 LT |
1000 | if (up->pending) { |
1001 | /* | |
1002 | * There are pending frames. | |
1003 | * The socket lock must be held while it's corked. | |
1004 | */ | |
1005 | lock_sock(sk); | |
1006 | if (likely(up->pending)) { | |
1007 | if (unlikely(up->pending != AF_INET6)) { | |
1008 | release_sock(sk); | |
1009 | return -EAFNOSUPPORT; | |
1010 | } | |
1011 | dst = NULL; | |
1012 | goto do_append_data; | |
1013 | } | |
1014 | release_sock(sk); | |
1015 | } | |
1016 | ulen += sizeof(struct udphdr); | |
1017 | ||
132a55f3 | 1018 | memset(&fl, 0, sizeof(fl)); |
1da177e4 LT |
1019 | |
1020 | if (sin6) { | |
1021 | if (sin6->sin6_port == 0) | |
1022 | return -EINVAL; | |
1023 | ||
132a55f3 | 1024 | fl.fl_ip_dport = sin6->sin6_port; |
1da177e4 LT |
1025 | daddr = &sin6->sin6_addr; |
1026 | ||
1027 | if (np->sndflow) { | |
132a55f3 HX |
1028 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1029 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { | |
1030 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1031 | if (flowlabel == NULL) |
1032 | return -EINVAL; | |
1033 | daddr = &flowlabel->dst; | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * Otherwise it will be difficult to maintain | |
1039 | * sk->sk_dst_cache. | |
1040 | */ | |
1041 | if (sk->sk_state == TCP_ESTABLISHED && | |
1042 | ipv6_addr_equal(daddr, &np->daddr)) | |
1043 | daddr = &np->daddr; | |
1044 | ||
1045 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1046 | sin6->sin6_scope_id && | |
1047 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
132a55f3 | 1048 | fl.oif = sin6->sin6_scope_id; |
1da177e4 LT |
1049 | } else { |
1050 | if (sk->sk_state != TCP_ESTABLISHED) | |
1051 | return -EDESTADDRREQ; | |
1052 | ||
c720c7e8 | 1053 | fl.fl_ip_dport = inet->inet_dport; |
1da177e4 | 1054 | daddr = &np->daddr; |
132a55f3 | 1055 | fl.fl6_flowlabel = np->flow_label; |
987905de | 1056 | connected = 1; |
1da177e4 LT |
1057 | } |
1058 | ||
132a55f3 HX |
1059 | if (!fl.oif) |
1060 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 | 1061 | |
9f690db7 YH |
1062 | if (!fl.oif) |
1063 | fl.oif = np->sticky_pktinfo.ipi6_ifindex; | |
1064 | ||
51953d5b BH |
1065 | fl.mark = sk->sk_mark; |
1066 | ||
1da177e4 LT |
1067 | if (msg->msg_controllen) { |
1068 | opt = &opt_space; | |
1069 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1070 | opt->tot_len = sizeof(*opt); | |
1071 | ||
13b52cd4 BH |
1072 | err = datagram_send_ctl(sock_net(sk), msg, &fl, opt, &hlimit, |
1073 | &tclass, &dontfrag); | |
1da177e4 LT |
1074 | if (err < 0) { |
1075 | fl6_sock_release(flowlabel); | |
1076 | return err; | |
1077 | } | |
132a55f3 HX |
1078 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1079 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); | |
1da177e4 LT |
1080 | if (flowlabel == NULL) |
1081 | return -EINVAL; | |
1082 | } | |
1083 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1084 | opt = NULL; | |
987905de | 1085 | connected = 0; |
1da177e4 LT |
1086 | } |
1087 | if (opt == NULL) | |
1088 | opt = np->opt; | |
df9890c3 YH |
1089 | if (flowlabel) |
1090 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1091 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1092 | |
ba4e58ec | 1093 | fl.proto = sk->sk_protocol; |
876c7f41 BH |
1094 | if (!ipv6_addr_any(daddr)) |
1095 | ipv6_addr_copy(&fl.fl6_dst, daddr); | |
1096 | else | |
1097 | fl.fl6_dst.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ | |
132a55f3 HX |
1098 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
1099 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
c720c7e8 | 1100 | fl.fl_ip_sport = inet->inet_sport; |
1ab1457c | 1101 | |
1da177e4 LT |
1102 | /* merge ip6_build_xmit from ip6_output */ |
1103 | if (opt && opt->srcrt) { | |
1104 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; | |
132a55f3 HX |
1105 | ipv6_addr_copy(&final, &fl.fl6_dst); |
1106 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
1da177e4 | 1107 | final_p = &final; |
987905de | 1108 | connected = 0; |
1da177e4 LT |
1109 | } |
1110 | ||
132a55f3 HX |
1111 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
1112 | fl.oif = np->mcast_oif; | |
987905de MK |
1113 | connected = 0; |
1114 | } | |
1da177e4 | 1115 | |
132a55f3 | 1116 | security_sk_classify_flow(sk, &fl); |
beb8d13b | 1117 | |
132a55f3 | 1118 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
1da177e4 LT |
1119 | if (err) |
1120 | goto out; | |
1121 | if (final_p) | |
132a55f3 | 1122 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1da177e4 | 1123 | |
52479b62 AD |
1124 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
1125 | if (err < 0) { | |
14e50e57 DM |
1126 | if (err == -EREMOTE) |
1127 | err = ip6_dst_blackhole(sk, &dst, &fl); | |
1128 | if (err < 0) | |
1129 | goto out; | |
1130 | } | |
1da177e4 LT |
1131 | |
1132 | if (hlimit < 0) { | |
132a55f3 | 1133 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
1da177e4 LT |
1134 | hlimit = np->mcast_hops; |
1135 | else | |
1136 | hlimit = np->hop_limit; | |
1137 | if (hlimit < 0) | |
6b75d090 | 1138 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1139 | } |
1140 | ||
e651f03a | 1141 | if (tclass < 0) |
41a1f8ea | 1142 | tclass = np->tclass; |
41a1f8ea | 1143 | |
13b52cd4 BH |
1144 | if (dontfrag < 0) |
1145 | dontfrag = np->dontfrag; | |
1146 | ||
1da177e4 LT |
1147 | if (msg->msg_flags&MSG_CONFIRM) |
1148 | goto do_confirm; | |
1149 | back_from_confirm: | |
1150 | ||
1151 | lock_sock(sk); | |
1152 | if (unlikely(up->pending)) { | |
1153 | /* The socket is already corked while preparing it. */ | |
1154 | /* ... which is an evident application bug. --ANK */ | |
1155 | release_sock(sk); | |
1156 | ||
64ce2073 | 1157 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1158 | err = -EINVAL; |
1159 | goto out; | |
1160 | } | |
1161 | ||
1162 | up->pending = AF_INET6; | |
1163 | ||
1164 | do_append_data: | |
1165 | up->len += ulen; | |
ba4e58ec GR |
1166 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1167 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
132a55f3 | 1168 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
41a1f8ea | 1169 | (struct rt6_info*)dst, |
13b52cd4 | 1170 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1171 | if (err) |
1172 | udp_v6_flush_pending_frames(sk); | |
1173 | else if (!corkreq) | |
4c0a6cb0 | 1174 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1175 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1176 | up->pending = 0; | |
1da177e4 | 1177 | |
a5e7c210 DM |
1178 | if (dst) { |
1179 | if (connected) { | |
1180 | ip6_dst_store(sk, dst, | |
132a55f3 | 1181 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
8e1ef0a9 YH |
1182 | &np->daddr : NULL, |
1183 | #ifdef CONFIG_IPV6_SUBTREES | |
132a55f3 | 1184 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
8e1ef0a9 YH |
1185 | &np->saddr : |
1186 | #endif | |
1187 | NULL); | |
a5e7c210 DM |
1188 | } else { |
1189 | dst_release(dst); | |
1190 | } | |
a3c96089 | 1191 | dst = NULL; |
a5e7c210 DM |
1192 | } |
1193 | ||
1da177e4 LT |
1194 | if (err > 0) |
1195 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1196 | release_sock(sk); | |
1197 | out: | |
a3c96089 | 1198 | dst_release(dst); |
1da177e4 | 1199 | fl6_sock_release(flowlabel); |
cd562c98 | 1200 | if (!err) |
1da177e4 | 1201 | return len; |
a18135eb DM |
1202 | /* |
1203 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1204 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1205 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1206 | * things). We could add another new stat but at least for now that | |
1207 | * seems like overkill. | |
1208 | */ | |
1209 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1210 | UDP6_INC_STATS_USER(sock_net(sk), |
1211 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1212 | } |
1da177e4 LT |
1213 | return err; |
1214 | ||
1215 | do_confirm: | |
1216 | dst_confirm(dst); | |
1217 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1218 | goto back_from_confirm; | |
1219 | err = 0; | |
1220 | goto out; | |
1221 | } | |
1222 | ||
7d06b2e0 | 1223 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
1224 | { |
1225 | lock_sock(sk); | |
1226 | udp_v6_flush_pending_frames(sk); | |
1227 | release_sock(sk); | |
1228 | ||
1229 | inet6_destroy_sock(sk); | |
1da177e4 LT |
1230 | } |
1231 | ||
1232 | /* | |
1233 | * Socket option code for UDP | |
1234 | */ | |
ba4e58ec | 1235 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1236 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1237 | { |
db8dac20 | 1238 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1239 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1240 | udp_v6_push_pending_frames); | |
ba4e58ec | 1241 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1242 | } |
1243 | ||
1244 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1245 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1246 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1247 | { |
db8dac20 | 1248 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1249 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1250 | udp_v6_push_pending_frames); | |
ba4e58ec | 1251 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1252 | } |
1253 | #endif | |
1254 | ||
ba4e58ec GR |
1255 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1256 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1257 | { |
db8dac20 | 1258 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1259 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1260 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1261 | } |
1262 | ||
1263 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1264 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1265 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1266 | { |
db8dac20 | 1267 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1268 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1269 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1270 | } |
1271 | #endif | |
1272 | ||
ba735425 SS |
1273 | static int udp6_ufo_send_check(struct sk_buff *skb) |
1274 | { | |
1275 | struct ipv6hdr *ipv6h; | |
1276 | struct udphdr *uh; | |
1277 | ||
1278 | if (!pskb_may_pull(skb, sizeof(*uh))) | |
1279 | return -EINVAL; | |
1280 | ||
1281 | ipv6h = ipv6_hdr(skb); | |
1282 | uh = udp_hdr(skb); | |
1283 | ||
1284 | uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, | |
1285 | IPPROTO_UDP, 0); | |
1286 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
1287 | skb->csum_offset = offsetof(struct udphdr, check); | |
1288 | skb->ip_summed = CHECKSUM_PARTIAL; | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features) | |
1293 | { | |
1294 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
1295 | unsigned int mss; | |
1296 | unsigned int unfrag_ip6hlen, unfrag_len; | |
1297 | struct frag_hdr *fptr; | |
1298 | u8 *mac_start, *prevhdr; | |
1299 | u8 nexthdr; | |
1300 | u8 frag_hdr_sz = sizeof(struct frag_hdr); | |
1301 | int offset; | |
1302 | __wsum csum; | |
1303 | ||
1304 | mss = skb_shinfo(skb)->gso_size; | |
1305 | if (unlikely(skb->len <= mss)) | |
1306 | goto out; | |
1307 | ||
1308 | if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { | |
1309 | /* Packet is from an untrusted source, reset gso_segs. */ | |
1310 | int type = skb_shinfo(skb)->gso_type; | |
1311 | ||
1312 | if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || | |
1313 | !(type & (SKB_GSO_UDP)))) | |
1314 | goto out; | |
1315 | ||
1316 | skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); | |
1317 | ||
1318 | segs = NULL; | |
1319 | goto out; | |
1320 | } | |
1321 | ||
1322 | /* Do software UFO. Complete and fill in the UDP checksum as HW cannot | |
1323 | * do checksum of UDP packets sent as multiple IP fragments. | |
1324 | */ | |
1325 | offset = skb->csum_start - skb_headroom(skb); | |
1326 | csum = skb_checksum(skb, offset, skb->len- offset, 0); | |
1327 | offset += skb->csum_offset; | |
1328 | *(__sum16 *)(skb->data + offset) = csum_fold(csum); | |
1329 | skb->ip_summed = CHECKSUM_NONE; | |
1330 | ||
1331 | /* Check if there is enough headroom to insert fragment header. */ | |
1332 | if ((skb_headroom(skb) < frag_hdr_sz) && | |
1333 | pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) | |
1334 | goto out; | |
1335 | ||
1336 | /* Find the unfragmentable header and shift it left by frag_hdr_sz | |
1337 | * bytes to insert fragment header. | |
1338 | */ | |
1339 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
1340 | nexthdr = *prevhdr; | |
1341 | *prevhdr = NEXTHDR_FRAGMENT; | |
1342 | unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + | |
1343 | unfrag_ip6hlen; | |
1344 | mac_start = skb_mac_header(skb); | |
1345 | memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); | |
1346 | ||
1347 | skb->mac_header -= frag_hdr_sz; | |
1348 | skb->network_header -= frag_hdr_sz; | |
1349 | ||
1350 | fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); | |
1351 | fptr->nexthdr = nexthdr; | |
1352 | fptr->reserved = 0; | |
1353 | ipv6_select_ident(fptr); | |
1354 | ||
1355 | /* Fragment the skb. ipv6 header and the remaining fields of the | |
1356 | * fragment header are updated in ipv6_gso_segment() | |
1357 | */ | |
1358 | segs = skb_segment(skb, features); | |
1359 | ||
1360 | out: | |
1361 | return segs; | |
1362 | } | |
1363 | ||
41135cc8 | 1364 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1365 | .handler = udpv6_rcv, |
1366 | .err_handler = udpv6_err, | |
ba735425 SS |
1367 | .gso_send_check = udp6_ufo_send_check, |
1368 | .gso_segment = udp6_ufo_fragment, | |
1da177e4 LT |
1369 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
1370 | }; | |
1371 | ||
1372 | /* ------------------------------------------------------------------------ */ | |
1373 | #ifdef CONFIG_PROC_FS | |
1374 | ||
1375 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1376 | { | |
1377 | struct inet_sock *inet = inet_sk(sp); | |
1378 | struct ipv6_pinfo *np = inet6_sk(sp); | |
1379 | struct in6_addr *dest, *src; | |
1380 | __u16 destp, srcp; | |
1381 | ||
1382 | dest = &np->daddr; | |
1383 | src = &np->rcv_saddr; | |
c720c7e8 ED |
1384 | destp = ntohs(inet->inet_dport); |
1385 | srcp = ntohs(inet->inet_sport); | |
1da177e4 | 1386 | seq_printf(seq, |
f86dcc5a | 1387 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
cb61cb9b | 1388 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d\n", |
1da177e4 LT |
1389 | bucket, |
1390 | src->s6_addr32[0], src->s6_addr32[1], | |
1391 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1392 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1393 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1394 | sp->sk_state, |
31e6d363 ED |
1395 | sk_wmem_alloc_get(sp), |
1396 | sk_rmem_alloc_get(sp), | |
1da177e4 LT |
1397 | 0, 0L, 0, |
1398 | sock_i_uid(sp), 0, | |
1399 | sock_i_ino(sp), | |
cb61cb9b ED |
1400 | atomic_read(&sp->sk_refcnt), sp, |
1401 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1402 | } |
1403 | ||
ba4e58ec | 1404 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1405 | { |
1406 | if (v == SEQ_START_TOKEN) | |
1407 | seq_printf(seq, | |
1408 | " sl " | |
1409 | "local_address " | |
1410 | "remote_address " | |
1411 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1412 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1413 | else |
1414 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1da177e4 | 1418 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1419 | .name = "udp6", |
1420 | .family = AF_INET6, | |
645ca708 | 1421 | .udp_table = &udp_table, |
4ad96d39 DL |
1422 | .seq_fops = { |
1423 | .owner = THIS_MODULE, | |
1424 | }, | |
dda61925 DL |
1425 | .seq_ops = { |
1426 | .show = udp6_seq_show, | |
1427 | }, | |
1da177e4 LT |
1428 | }; |
1429 | ||
2c8c1e72 | 1430 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1431 | { |
0c96d8c5 | 1432 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1433 | } |
1434 | ||
0c96d8c5 DL |
1435 | void udp6_proc_exit(struct net *net) { |
1436 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1437 | } |
1438 | #endif /* CONFIG_PROC_FS */ | |
1439 | ||
1440 | /* ------------------------------------------------------------------------ */ | |
1441 | ||
1442 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1443 | .name = "UDPv6", |
1444 | .owner = THIS_MODULE, | |
ba4e58ec | 1445 | .close = udp_lib_close, |
543d9cfe ACM |
1446 | .connect = ip6_datagram_connect, |
1447 | .disconnect = udp_disconnect, | |
1448 | .ioctl = udp_ioctl, | |
1449 | .destroy = udpv6_destroy_sock, | |
1450 | .setsockopt = udpv6_setsockopt, | |
1451 | .getsockopt = udpv6_getsockopt, | |
1452 | .sendmsg = udpv6_sendmsg, | |
1453 | .recvmsg = udpv6_recvmsg, | |
1454 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1455 | .hash = udp_lib_hash, |
1456 | .unhash = udp_lib_unhash, | |
543d9cfe | 1457 | .get_port = udp_v6_get_port, |
95766fff HA |
1458 | .memory_allocated = &udp_memory_allocated, |
1459 | .sysctl_mem = sysctl_udp_mem, | |
1460 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1461 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1462 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1463 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1464 | .h.udp_table = &udp_table, |
3fdadf7d | 1465 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1466 | .compat_setsockopt = compat_udpv6_setsockopt, |
1467 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1468 | #endif |
1da177e4 LT |
1469 | }; |
1470 | ||
1da177e4 LT |
1471 | static struct inet_protosw udpv6_protosw = { |
1472 | .type = SOCK_DGRAM, | |
1473 | .protocol = IPPROTO_UDP, | |
1474 | .prot = &udpv6_prot, | |
1475 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1476 | .no_check = UDP_CSUM_DEFAULT, |
1477 | .flags = INET_PROTOSW_PERMANENT, | |
1478 | }; | |
1479 | ||
1480 | ||
7f4e4868 | 1481 | int __init udpv6_init(void) |
1da177e4 | 1482 | { |
7f4e4868 DL |
1483 | int ret; |
1484 | ||
1485 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1486 | if (ret) | |
1487 | goto out; | |
1488 | ||
1489 | ret = inet6_register_protosw(&udpv6_protosw); | |
1490 | if (ret) | |
1491 | goto out_udpv6_protocol; | |
1492 | out: | |
1493 | return ret; | |
1494 | ||
1495 | out_udpv6_protocol: | |
1496 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1497 | goto out; | |
1498 | } | |
1499 | ||
09f7709f | 1500 | void udpv6_exit(void) |
7f4e4868 DL |
1501 | { |
1502 | inet6_unregister_protosw(&udpv6_protosw); | |
1503 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1504 | } |