Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * UDP over IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Based on linux/ipv4/udp.c | |
9 | * | |
1da177e4 LT |
10 | * Fixes: |
11 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
12 | * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which | |
13 | * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind | |
14 | * a single port at the same time. | |
15 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data | |
16 | * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | */ | |
23 | ||
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/sockios.h> | |
1da177e4 LT |
28 | #include <linux/net.h> |
29 | #include <linux/in6.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/ipv6.h> | |
33 | #include <linux/icmpv6.h> | |
34 | #include <linux/init.h> | |
1781f7f5 | 35 | #include <linux/module.h> |
3305b80c | 36 | #include <linux/skbuff.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
1da177e4 LT |
38 | #include <asm/uaccess.h> |
39 | ||
1da177e4 LT |
40 | #include <net/ndisc.h> |
41 | #include <net/protocol.h> | |
42 | #include <net/transp_v6.h> | |
43 | #include <net/ip6_route.h> | |
1da177e4 | 44 | #include <net/raw.h> |
c752f073 | 45 | #include <net/tcp_states.h> |
1da177e4 LT |
46 | #include <net/ip6_checksum.h> |
47 | #include <net/xfrm.h> | |
48 | ||
49 | #include <linux/proc_fs.h> | |
50 | #include <linux/seq_file.h> | |
ba4e58ec | 51 | #include "udp_impl.h" |
1da177e4 | 52 | |
b2f5e7cd VY |
53 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
54 | { | |
55 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
56 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); | |
68835aba ED |
57 | __be32 sk1_rcv_saddr = sk_rcv_saddr(sk); |
58 | __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2); | |
b2f5e7cd VY |
59 | int sk_ipv6only = ipv6_only_sock(sk); |
60 | int sk2_ipv6only = inet_v6_ipv6only(sk2); | |
61 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); | |
62 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
63 | ||
64 | /* if both are mapped, treat as IPv4 */ | |
65 | if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) | |
499923c7 | 66 | return (!sk2_ipv6only && |
c720c7e8 ED |
67 | (!sk1_rcv_saddr || !sk2_rcv_saddr || |
68 | sk1_rcv_saddr == sk2_rcv_saddr)); | |
b2f5e7cd VY |
69 | |
70 | if (addr_type2 == IPV6_ADDR_ANY && | |
71 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
72 | return 1; | |
73 | ||
74 | if (addr_type == IPV6_ADDR_ANY && | |
75 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
76 | return 1; | |
77 | ||
78 | if (sk2_rcv_saddr6 && | |
79 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
80 | return 1; | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
d4cada4a ED |
85 | static unsigned int udp6_portaddr_hash(struct net *net, |
86 | const struct in6_addr *addr6, | |
87 | unsigned int port) | |
88 | { | |
89 | unsigned int hash, mix = net_hash_mix(net); | |
90 | ||
91 | if (ipv6_addr_any(addr6)) | |
92 | hash = jhash_1word(0, mix); | |
856540ee | 93 | else if (ipv6_addr_v4mapped(addr6)) |
0eae88f3 | 94 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
d4cada4a | 95 | else |
0eae88f3 | 96 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
d4cada4a ED |
97 | |
98 | return hash ^ port; | |
99 | } | |
100 | ||
101 | ||
6ba5a3c5 | 102 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 103 | { |
30fff923 ED |
104 | unsigned int hash2_nulladdr = |
105 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); | |
106 | unsigned int hash2_partial = | |
107 | udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); | |
108 | ||
d4cada4a | 109 | /* precompute partial secondary hash */ |
30fff923 ED |
110 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
111 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); | |
1da177e4 LT |
112 | } |
113 | ||
719f8358 ED |
114 | static void udp_v6_rehash(struct sock *sk) |
115 | { | |
116 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), | |
117 | &inet6_sk(sk)->rcv_saddr, | |
118 | inet_sk(sk)->inet_num); | |
119 | ||
120 | udp_lib_rehash(sk, new_hash); | |
121 | } | |
122 | ||
645ca708 ED |
123 | static inline int compute_score(struct sock *sk, struct net *net, |
124 | unsigned short hnum, | |
88440ae7 BS |
125 | const struct in6_addr *saddr, __be16 sport, |
126 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 ED |
127 | int dif) |
128 | { | |
129 | int score = -1; | |
130 | ||
d4cada4a | 131 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
645ca708 ED |
132 | sk->sk_family == PF_INET6) { |
133 | struct ipv6_pinfo *np = inet6_sk(sk); | |
134 | struct inet_sock *inet = inet_sk(sk); | |
135 | ||
136 | score = 0; | |
c720c7e8 ED |
137 | if (inet->inet_dport) { |
138 | if (inet->inet_dport != sport) | |
645ca708 ED |
139 | return -1; |
140 | score++; | |
141 | } | |
142 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
143 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
144 | return -1; | |
145 | score++; | |
146 | } | |
147 | if (!ipv6_addr_any(&np->daddr)) { | |
148 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
149 | return -1; | |
150 | score++; | |
151 | } | |
152 | if (sk->sk_bound_dev_if) { | |
153 | if (sk->sk_bound_dev_if != dif) | |
154 | return -1; | |
155 | score++; | |
156 | } | |
157 | } | |
158 | return score; | |
159 | } | |
160 | ||
fddc17de ED |
161 | #define SCORE2_MAX (1 + 1 + 1) |
162 | static inline int compute_score2(struct sock *sk, struct net *net, | |
163 | const struct in6_addr *saddr, __be16 sport, | |
164 | const struct in6_addr *daddr, unsigned short hnum, | |
165 | int dif) | |
166 | { | |
167 | int score = -1; | |
168 | ||
169 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && | |
170 | sk->sk_family == PF_INET6) { | |
171 | struct ipv6_pinfo *np = inet6_sk(sk); | |
172 | struct inet_sock *inet = inet_sk(sk); | |
173 | ||
174 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
175 | return -1; | |
176 | score = 0; | |
177 | if (inet->inet_dport) { | |
178 | if (inet->inet_dport != sport) | |
179 | return -1; | |
180 | score++; | |
181 | } | |
182 | if (!ipv6_addr_any(&np->daddr)) { | |
183 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
184 | return -1; | |
185 | score++; | |
186 | } | |
187 | if (sk->sk_bound_dev_if) { | |
188 | if (sk->sk_bound_dev_if != dif) | |
189 | return -1; | |
190 | score++; | |
191 | } | |
192 | } | |
193 | return score; | |
194 | } | |
195 | ||
fddc17de ED |
196 | |
197 | /* called with read_rcu_lock() */ | |
198 | static struct sock *udp6_lib_lookup2(struct net *net, | |
199 | const struct in6_addr *saddr, __be16 sport, | |
200 | const struct in6_addr *daddr, unsigned int hnum, int dif, | |
201 | struct udp_hslot *hslot2, unsigned int slot2) | |
202 | { | |
203 | struct sock *sk, *result; | |
204 | struct hlist_nulls_node *node; | |
205 | int score, badness; | |
206 | ||
207 | begin: | |
208 | result = NULL; | |
209 | badness = -1; | |
210 | udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { | |
211 | score = compute_score2(sk, net, saddr, sport, | |
212 | daddr, hnum, dif); | |
213 | if (score > badness) { | |
214 | result = sk; | |
215 | badness = score; | |
216 | if (score == SCORE2_MAX) | |
217 | goto exact_match; | |
218 | } | |
219 | } | |
220 | /* | |
221 | * if the nulls value we got at the end of this lookup is | |
222 | * not the expected one, we must restart lookup. | |
223 | * We probably met an item that was moved to another chain. | |
224 | */ | |
225 | if (get_nulls_value(node) != slot2) | |
226 | goto begin; | |
227 | ||
228 | if (result) { | |
229 | exact_match: | |
c31504dc | 230 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
fddc17de ED |
231 | result = NULL; |
232 | else if (unlikely(compute_score2(result, net, saddr, sport, | |
233 | daddr, hnum, dif) < badness)) { | |
234 | sock_put(result); | |
235 | goto begin; | |
236 | } | |
237 | } | |
238 | return result; | |
239 | } | |
240 | ||
fa4d3c62 | 241 | static struct sock *__udp6_lib_lookup(struct net *net, |
88440ae7 BS |
242 | const struct in6_addr *saddr, __be16 sport, |
243 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 | 244 | int dif, struct udp_table *udptable) |
1da177e4 | 245 | { |
271b72c7 | 246 | struct sock *sk, *result; |
88ab1932 | 247 | struct hlist_nulls_node *node; |
1da177e4 | 248 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
249 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
250 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
271b72c7 | 251 | int score, badness; |
645ca708 | 252 | |
271b72c7 | 253 | rcu_read_lock(); |
fddc17de ED |
254 | if (hslot->count > 10) { |
255 | hash2 = udp6_portaddr_hash(net, daddr, hnum); | |
256 | slot2 = hash2 & udptable->mask; | |
257 | hslot2 = &udptable->hash2[slot2]; | |
258 | if (hslot->count < hslot2->count) | |
259 | goto begin; | |
260 | ||
261 | result = udp6_lib_lookup2(net, saddr, sport, | |
262 | daddr, hnum, dif, | |
263 | hslot2, slot2); | |
264 | if (!result) { | |
265 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); | |
266 | slot2 = hash2 & udptable->mask; | |
267 | hslot2 = &udptable->hash2[slot2]; | |
268 | if (hslot->count < hslot2->count) | |
269 | goto begin; | |
270 | ||
1223c67c JBD |
271 | result = udp6_lib_lookup2(net, saddr, sport, |
272 | &in6addr_any, hnum, dif, | |
fddc17de ED |
273 | hslot2, slot2); |
274 | } | |
275 | rcu_read_unlock(); | |
276 | return result; | |
277 | } | |
271b72c7 ED |
278 | begin: |
279 | result = NULL; | |
280 | badness = -1; | |
88ab1932 | 281 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
282 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
283 | if (score > badness) { | |
284 | result = sk; | |
285 | badness = score; | |
1da177e4 LT |
286 | } |
287 | } | |
88ab1932 ED |
288 | /* |
289 | * if the nulls value we got at the end of this lookup is | |
290 | * not the expected one, we must restart lookup. | |
291 | * We probably met an item that was moved to another chain. | |
292 | */ | |
fddc17de | 293 | if (get_nulls_value(node) != slot) |
88ab1932 ED |
294 | goto begin; |
295 | ||
271b72c7 | 296 | if (result) { |
c31504dc | 297 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
271b72c7 ED |
298 | result = NULL; |
299 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
300 | daddr, dport, dif) < badness)) { | |
301 | sock_put(result); | |
302 | goto begin; | |
303 | } | |
304 | } | |
305 | rcu_read_unlock(); | |
1da177e4 LT |
306 | return result; |
307 | } | |
308 | ||
607c4aaf KK |
309 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
310 | __be16 sport, __be16 dport, | |
645ca708 | 311 | struct udp_table *udptable) |
607c4aaf | 312 | { |
23542618 | 313 | struct sock *sk; |
b71d1d42 | 314 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
607c4aaf | 315 | |
23542618 KK |
316 | if (unlikely(sk = skb_steal_sock(skb))) |
317 | return sk; | |
adf30907 ED |
318 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
319 | &iph->daddr, dport, inet6_iif(skb), | |
320 | udptable); | |
607c4aaf KK |
321 | } |
322 | ||
aa976fc0 BS |
323 | struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, |
324 | const struct in6_addr *daddr, __be16 dport, int dif) | |
325 | { | |
326 | return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); | |
327 | } | |
328 | EXPORT_SYMBOL_GPL(udp6_lib_lookup); | |
329 | ||
330 | ||
1da177e4 LT |
331 | /* |
332 | * This should be easy, if there is something there we | |
333 | * return it, otherwise we block. | |
334 | */ | |
335 | ||
ba4e58ec | 336 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
337 | struct msghdr *msg, size_t len, |
338 | int noblock, int flags, int *addr_len) | |
339 | { | |
340 | struct ipv6_pinfo *np = inet6_sk(sk); | |
341 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 342 | struct sk_buff *skb; |
81d54ec8 | 343 | unsigned int ulen; |
a59322be | 344 | int peeked; |
759e5d00 HX |
345 | int err; |
346 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 347 | int is_udp4; |
8a74ad60 | 348 | bool slow; |
1da177e4 | 349 | |
1ab1457c YH |
350 | if (addr_len) |
351 | *addr_len=sizeof(struct sockaddr_in6); | |
352 | ||
1da177e4 LT |
353 | if (flags & MSG_ERRQUEUE) |
354 | return ipv6_recv_error(sk, msg, len); | |
355 | ||
4b340ae2 BH |
356 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
357 | return ipv6_recv_rxpmtu(sk, msg, len); | |
358 | ||
1da177e4 | 359 | try_again: |
a59322be HX |
360 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
361 | &peeked, &err); | |
1da177e4 LT |
362 | if (!skb) |
363 | goto out; | |
364 | ||
759e5d00 | 365 | ulen = skb->len - sizeof(struct udphdr); |
81d54ec8 GR |
366 | if (len > ulen) |
367 | len = ulen; | |
368 | else if (len < ulen) | |
1ab1457c | 369 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 370 | |
f26ba175 WY |
371 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
372 | ||
ba4e58ec | 373 | /* |
759e5d00 HX |
374 | * If checksum is needed at all, try to do it while copying the |
375 | * data. If the data is truncated, or if we only want a partial | |
376 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 377 | */ |
ba4e58ec | 378 | |
81d54ec8 | 379 | if (len < ulen || UDP_SKB_CB(skb)->partial_cov) { |
759e5d00 | 380 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 381 | goto csum_copy_err; |
ba4e58ec GR |
382 | } |
383 | ||
60476372 | 384 | if (skb_csum_unnecessary(skb)) |
ba4e58ec | 385 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
81d54ec8 | 386 | msg->msg_iov,len); |
ba4e58ec | 387 | else { |
1da177e4 LT |
388 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
389 | if (err == -EINVAL) | |
390 | goto csum_copy_err; | |
391 | } | |
392 | if (err) | |
393 | goto out_free; | |
394 | ||
f26ba175 WY |
395 | if (!peeked) { |
396 | if (is_udp4) | |
397 | UDP_INC_STATS_USER(sock_net(sk), | |
398 | UDP_MIB_INDATAGRAMS, is_udplite); | |
399 | else | |
400 | UDP6_INC_STATS_USER(sock_net(sk), | |
401 | UDP_MIB_INDATAGRAMS, is_udplite); | |
402 | } | |
cb75994e | 403 | |
3b885787 | 404 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
405 | |
406 | /* Copy the address. */ | |
407 | if (msg->msg_name) { | |
408 | struct sockaddr_in6 *sin6; | |
1ab1457c | 409 | |
1da177e4 LT |
410 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
411 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 412 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 LT |
413 | sin6->sin6_flowinfo = 0; |
414 | sin6->sin6_scope_id = 0; | |
415 | ||
f26ba175 | 416 | if (is_udp4) |
b301e82c BH |
417 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
418 | &sin6->sin6_addr); | |
1da177e4 | 419 | else { |
0660e03f ACM |
420 | ipv6_addr_copy(&sin6->sin6_addr, |
421 | &ipv6_hdr(skb)->saddr); | |
1da177e4 LT |
422 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
423 | sin6->sin6_scope_id = IP6CB(skb)->iif; | |
424 | } | |
425 | ||
426 | } | |
f26ba175 | 427 | if (is_udp4) { |
1da177e4 LT |
428 | if (inet->cmsg_flags) |
429 | ip_cmsg_recv(msg, skb); | |
430 | } else { | |
431 | if (np->rxopt.all) | |
432 | datagram_recv_ctl(sk, msg, skb); | |
1ab1457c | 433 | } |
1da177e4 | 434 | |
81d54ec8 | 435 | err = len; |
1da177e4 | 436 | if (flags & MSG_TRUNC) |
759e5d00 | 437 | err = ulen; |
1da177e4 LT |
438 | |
439 | out_free: | |
9d410c79 | 440 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
441 | out: |
442 | return err; | |
443 | ||
444 | csum_copy_err: | |
8a74ad60 | 445 | slow = lock_sock_fast(sk); |
0856f939 WY |
446 | if (!skb_kill_datagram(sk, skb, flags)) { |
447 | if (is_udp4) | |
448 | UDP_INC_STATS_USER(sock_net(sk), | |
449 | UDP_MIB_INERRORS, is_udplite); | |
450 | else | |
451 | UDP6_INC_STATS_USER(sock_net(sk), | |
452 | UDP_MIB_INERRORS, is_udplite); | |
453 | } | |
8a74ad60 | 454 | unlock_sock_fast(sk, slow); |
1da177e4 | 455 | |
32c90254 | 456 | if (noblock) |
1da177e4 | 457 | return -EAGAIN; |
9cfaa8de XZ |
458 | |
459 | /* starting over for a new packet */ | |
460 | msg->msg_flags &= ~MSG_TRUNC; | |
1da177e4 LT |
461 | goto try_again; |
462 | } | |
463 | ||
ba4e58ec | 464 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 465 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 466 | struct udp_table *udptable) |
1da177e4 LT |
467 | { |
468 | struct ipv6_pinfo *np; | |
b71d1d42 ED |
469 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
470 | const struct in6_addr *saddr = &hdr->saddr; | |
471 | const struct in6_addr *daddr = &hdr->daddr; | |
1da177e4 LT |
472 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); |
473 | struct sock *sk; | |
474 | int err; | |
475 | ||
c346dca1 | 476 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 477 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
478 | if (sk == NULL) |
479 | return; | |
480 | ||
481 | np = inet6_sk(sk); | |
482 | ||
483 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
484 | goto out; | |
485 | ||
486 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
487 | goto out; | |
488 | ||
b1faf566 | 489 | if (np->recverr) |
1da177e4 | 490 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
b1faf566 | 491 | |
1da177e4 LT |
492 | sk->sk_err = err; |
493 | sk->sk_error_report(sk); | |
494 | out: | |
495 | sock_put(sk); | |
496 | } | |
497 | ||
ba4e58ec | 498 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
499 | struct inet6_skb_parm *opt, u8 type, |
500 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 501 | { |
645ca708 | 502 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
503 | } |
504 | ||
505 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) | |
1da177e4 | 506 | { |
ba4e58ec | 507 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 508 | int rc; |
b2bf1e26 | 509 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 510 | |
47482f13 | 511 | if (!ipv6_addr_any(&inet6_sk(sk)->daddr)) |
bdeab991 | 512 | sock_rps_save_rxhash(sk, skb); |
47482f13 | 513 | |
ba4e58ec GR |
514 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
515 | goto drop; | |
1da177e4 | 516 | |
ba4e58ec GR |
517 | /* |
518 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
519 | */ | |
b2bf1e26 | 520 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
521 | |
522 | if (up->pcrlen == 0) { /* full coverage was set */ | |
523 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
524 | " %d while full coverage %d requested\n", | |
525 | UDP_SKB_CB(skb)->cscov, skb->len); | |
526 | goto drop; | |
527 | } | |
528 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
529 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
530 | "too small, need min %d\n", | |
531 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
532 | goto drop; | |
533 | } | |
1da177e4 LT |
534 | } |
535 | ||
33d480ce | 536 | if (rcu_access_pointer(sk->sk_filter)) { |
1ab6eb62 HX |
537 | if (udp_lib_checksum_complete(skb)) |
538 | goto drop; | |
539 | } | |
ba4e58ec | 540 | |
d826eb14 ED |
541 | skb_dst_drop(skb); |
542 | rc = sock_queue_rcv_skb(sk, skb); | |
543 | if (rc < 0) { | |
a18135eb | 544 | /* Note that an ENOMEM error is charged twice */ |
766e9037 | 545 | if (rc == -ENOMEM) |
ef28d1a2 PE |
546 | UDP6_INC_STATS_BH(sock_net(sk), |
547 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
8edf19c2 | 548 | goto drop_no_sk_drops_inc; |
1da177e4 | 549 | } |
cb75994e | 550 | |
1da177e4 | 551 | return 0; |
ba4e58ec | 552 | drop: |
8edf19c2 ED |
553 | atomic_inc(&sk->sk_drops); |
554 | drop_no_sk_drops_inc: | |
ef28d1a2 | 555 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
ba4e58ec GR |
556 | kfree_skb(skb); |
557 | return -1; | |
1da177e4 LT |
558 | } |
559 | ||
920a4611 | 560 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
b71d1d42 ED |
561 | __be16 loc_port, const struct in6_addr *loc_addr, |
562 | __be16 rmt_port, const struct in6_addr *rmt_addr, | |
1da177e4 LT |
563 | int dif) |
564 | { | |
88ab1932 | 565 | struct hlist_nulls_node *node; |
1da177e4 LT |
566 | struct sock *s = sk; |
567 | unsigned short num = ntohs(loc_port); | |
568 | ||
88ab1932 | 569 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
570 | struct inet_sock *inet = inet_sk(s); |
571 | ||
920a4611 | 572 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
573 | continue; |
574 | ||
d4cada4a ED |
575 | if (udp_sk(s)->udp_port_hash == num && |
576 | s->sk_family == PF_INET6) { | |
1da177e4 | 577 | struct ipv6_pinfo *np = inet6_sk(s); |
c720c7e8 ED |
578 | if (inet->inet_dport) { |
579 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
580 | continue; |
581 | } | |
582 | if (!ipv6_addr_any(&np->daddr) && | |
583 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
584 | continue; | |
585 | ||
586 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
587 | continue; | |
588 | ||
589 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
590 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
591 | continue; | |
1da177e4 | 592 | } |
add459aa | 593 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
594 | continue; |
595 | return s; | |
596 | } | |
597 | } | |
598 | return NULL; | |
599 | } | |
600 | ||
a1ab77f9 ED |
601 | static void flush_stack(struct sock **stack, unsigned int count, |
602 | struct sk_buff *skb, unsigned int final) | |
603 | { | |
604 | unsigned int i; | |
605 | struct sock *sk; | |
606 | struct sk_buff *skb1; | |
607 | ||
608 | for (i = 0; i < count; i++) { | |
609 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
610 | ||
f6b8f32c | 611 | sk = stack[i]; |
a1ab77f9 | 612 | if (skb1) { |
c0722400 | 613 | if (sk_rcvqueues_full(sk, skb1)) { |
c377411f ED |
614 | kfree_skb(skb1); |
615 | goto drop; | |
616 | } | |
a1ab77f9 ED |
617 | bh_lock_sock(sk); |
618 | if (!sock_owned_by_user(sk)) | |
619 | udpv6_queue_rcv_skb(sk, skb1); | |
a3a858ff | 620 | else if (sk_add_backlog(sk, skb1)) { |
55349790 ZY |
621 | kfree_skb(skb1); |
622 | bh_unlock_sock(sk); | |
623 | goto drop; | |
624 | } | |
a1ab77f9 | 625 | bh_unlock_sock(sk); |
55349790 | 626 | continue; |
a1ab77f9 | 627 | } |
55349790 ZY |
628 | drop: |
629 | atomic_inc(&sk->sk_drops); | |
630 | UDP6_INC_STATS_BH(sock_net(sk), | |
631 | UDP_MIB_RCVBUFERRORS, IS_UDPLITE(sk)); | |
632 | UDP6_INC_STATS_BH(sock_net(sk), | |
633 | UDP_MIB_INERRORS, IS_UDPLITE(sk)); | |
a1ab77f9 ED |
634 | } |
635 | } | |
1da177e4 LT |
636 | /* |
637 | * Note: called only from the BH handler context, | |
638 | * so we don't need to lock the hashes. | |
639 | */ | |
e3163493 | 640 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
b71d1d42 | 641 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
645ca708 | 642 | struct udp_table *udptable) |
1da177e4 | 643 | { |
a1ab77f9 | 644 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 645 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 646 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 647 | int dif; |
a1ab77f9 | 648 | unsigned int i, count = 0; |
1da177e4 | 649 | |
645ca708 | 650 | spin_lock(&hslot->lock); |
88ab1932 | 651 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 652 | dif = inet6_iif(skb); |
920a4611 | 653 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
654 | while (sk) { |
655 | stack[count++] = sk; | |
656 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
657 | uh->source, saddr, dif); | |
658 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
659 | if (!sk) | |
660 | break; | |
661 | flush_stack(stack, count, skb, ~0); | |
662 | count = 0; | |
95766fff | 663 | } |
1da177e4 | 664 | } |
a1ab77f9 ED |
665 | /* |
666 | * before releasing the lock, we must take reference on sockets | |
667 | */ | |
668 | for (i = 0; i < count; i++) | |
669 | sock_hold(stack[i]); | |
670 | ||
645ca708 | 671 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
672 | |
673 | if (count) { | |
674 | flush_stack(stack, count, skb, count - 1); | |
675 | ||
676 | for (i = 0; i < count; i++) | |
677 | sock_put(stack[i]); | |
678 | } else { | |
679 | kfree_skb(skb); | |
680 | } | |
ba4e58ec | 681 | return 0; |
1da177e4 LT |
682 | } |
683 | ||
759e5d00 HX |
684 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh, |
685 | int proto) | |
ba4e58ec | 686 | { |
759e5d00 HX |
687 | int err; |
688 | ||
689 | UDP_SKB_CB(skb)->partial_cov = 0; | |
690 | UDP_SKB_CB(skb)->cscov = skb->len; | |
691 | ||
db8dac20 | 692 | if (proto == IPPROTO_UDPLITE) { |
759e5d00 HX |
693 | err = udplite_checksum_init(skb, uh); |
694 | if (err) | |
695 | return err; | |
696 | } | |
697 | ||
ba4e58ec GR |
698 | if (uh->check == 0) { |
699 | /* RFC 2460 section 8.1 says that we SHOULD log | |
700 | this error. Well, it is reasonable. | |
701 | */ | |
702 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); | |
703 | return 1; | |
704 | } | |
705 | if (skb->ip_summed == CHECKSUM_COMPLETE && | |
0660e03f | 706 | !csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
759e5d00 | 707 | skb->len, proto, skb->csum)) |
ba4e58ec GR |
708 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
709 | ||
60476372 | 710 | if (!skb_csum_unnecessary(skb)) |
0660e03f ACM |
711 | skb->csum = ~csum_unfold(csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
712 | &ipv6_hdr(skb)->daddr, | |
759e5d00 | 713 | skb->len, proto, 0)); |
ba4e58ec | 714 | |
759e5d00 | 715 | return 0; |
ba4e58ec GR |
716 | } |
717 | ||
645ca708 | 718 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 719 | int proto) |
1da177e4 | 720 | { |
3ffe533c | 721 | struct net *net = dev_net(skb->dev); |
1da177e4 | 722 | struct sock *sk; |
1ab1457c | 723 | struct udphdr *uh; |
b71d1d42 | 724 | const struct in6_addr *saddr, *daddr; |
1da177e4 LT |
725 | u32 ulen = 0; |
726 | ||
727 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 728 | goto discard; |
1da177e4 | 729 | |
0660e03f ACM |
730 | saddr = &ipv6_hdr(skb)->saddr; |
731 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 732 | uh = udp_hdr(skb); |
1da177e4 LT |
733 | |
734 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
735 | if (ulen > skb->len) |
736 | goto short_packet; | |
1da177e4 | 737 | |
759e5d00 HX |
738 | if (proto == IPPROTO_UDP) { |
739 | /* UDP validates ulen. */ | |
1da177e4 | 740 | |
ba4e58ec GR |
741 | /* Check for jumbo payload */ |
742 | if (ulen == 0) | |
743 | ulen = skb->len; | |
1da177e4 | 744 | |
ba4e58ec GR |
745 | if (ulen < sizeof(*uh)) |
746 | goto short_packet; | |
1da177e4 | 747 | |
ba4e58ec GR |
748 | if (ulen < skb->len) { |
749 | if (pskb_trim_rcsum(skb, ulen)) | |
750 | goto short_packet; | |
0660e03f ACM |
751 | saddr = &ipv6_hdr(skb)->saddr; |
752 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 753 | uh = udp_hdr(skb); |
ba4e58ec | 754 | } |
ba4e58ec | 755 | } |
1da177e4 | 756 | |
759e5d00 HX |
757 | if (udp6_csum_init(skb, uh, proto)) |
758 | goto discard; | |
759 | ||
1ab1457c YH |
760 | /* |
761 | * Multicast receive code | |
1da177e4 | 762 | */ |
ba4e58ec | 763 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
764 | return __udp6_lib_mcast_deliver(net, skb, |
765 | saddr, daddr, udptable); | |
1da177e4 LT |
766 | |
767 | /* Unicast */ | |
768 | ||
1ab1457c | 769 | /* |
1da177e4 LT |
770 | * check socket cache ... must talk to Alan about his plans |
771 | * for sock caches... i'll skip this for now. | |
772 | */ | |
607c4aaf | 773 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
1da177e4 LT |
774 | |
775 | if (sk == NULL) { | |
776 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) | |
777 | goto discard; | |
778 | ||
ba4e58ec | 779 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 780 | goto discard; |
ef28d1a2 PE |
781 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, |
782 | proto == IPPROTO_UDPLITE); | |
1da177e4 | 783 | |
3ffe533c | 784 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); |
1da177e4 LT |
785 | |
786 | kfree_skb(skb); | |
add459aa | 787 | return 0; |
1da177e4 | 788 | } |
1ab1457c | 789 | |
1da177e4 | 790 | /* deliver */ |
1ab1457c | 791 | |
c377411f ED |
792 | if (sk_rcvqueues_full(sk, skb)) { |
793 | sock_put(sk); | |
794 | goto discard; | |
795 | } | |
d97106ea | 796 | bh_lock_sock(sk); |
95766fff HA |
797 | if (!sock_owned_by_user(sk)) |
798 | udpv6_queue_rcv_skb(sk, skb); | |
a3a858ff | 799 | else if (sk_add_backlog(sk, skb)) { |
55349790 ZY |
800 | atomic_inc(&sk->sk_drops); |
801 | bh_unlock_sock(sk); | |
802 | sock_put(sk); | |
803 | goto discard; | |
804 | } | |
95766fff | 805 | bh_unlock_sock(sk); |
1da177e4 | 806 | sock_put(sk); |
add459aa | 807 | return 0; |
1da177e4 | 808 | |
1ab1457c | 809 | short_packet: |
d6bc0149 | 810 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 811 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
812 | saddr, |
813 | ntohs(uh->source), | |
814 | ulen, | |
815 | skb->len, | |
816 | daddr, | |
817 | ntohs(uh->dest)); | |
1da177e4 LT |
818 | |
819 | discard: | |
ef28d1a2 | 820 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 821 | kfree_skb(skb); |
add459aa | 822 | return 0; |
1da177e4 | 823 | } |
ba4e58ec | 824 | |
e5bbef20 | 825 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 826 | { |
645ca708 | 827 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
828 | } |
829 | ||
1da177e4 LT |
830 | /* |
831 | * Throw away all pending data and cancel the corking. Socket is locked. | |
832 | */ | |
833 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
834 | { | |
835 | struct udp_sock *up = udp_sk(sk); | |
836 | ||
36d926b9 DL |
837 | if (up->pending == AF_INET) |
838 | udp_flush_pending_frames(sk); | |
839 | else if (up->pending) { | |
1da177e4 LT |
840 | up->len = 0; |
841 | up->pending = 0; | |
842 | ip6_flush_pending_frames(sk); | |
1ab1457c | 843 | } |
1da177e4 LT |
844 | } |
845 | ||
493c6be3 SS |
846 | /** |
847 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
848 | * @sk: socket we are sending on | |
849 | * @skb: sk_buff containing the filled-in UDP header | |
850 | * (checksum field must be zeroed out) | |
851 | */ | |
852 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
853 | const struct in6_addr *saddr, | |
854 | const struct in6_addr *daddr, int len) | |
855 | { | |
856 | unsigned int offset; | |
857 | struct udphdr *uh = udp_hdr(skb); | |
858 | __wsum csum = 0; | |
859 | ||
860 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
861 | /* Only one fragment on the socket. */ | |
862 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
863 | skb->csum_offset = offsetof(struct udphdr, check); | |
864 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
865 | } else { | |
866 | /* | |
867 | * HW-checksum won't work as there are two or more | |
868 | * fragments on the socket so that all csums of sk_buffs | |
869 | * should be together | |
870 | */ | |
871 | offset = skb_transport_offset(skb); | |
872 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
873 | ||
874 | skb->ip_summed = CHECKSUM_NONE; | |
875 | ||
876 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
877 | csum = csum_add(csum, skb->csum); | |
878 | } | |
879 | ||
880 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
881 | csum); | |
882 | if (uh->check == 0) | |
883 | uh->check = CSUM_MANGLED_0; | |
884 | } | |
885 | } | |
886 | ||
1da177e4 LT |
887 | /* |
888 | * Sending | |
889 | */ | |
890 | ||
4c0a6cb0 | 891 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
892 | { |
893 | struct sk_buff *skb; | |
894 | struct udphdr *uh; | |
4c0a6cb0 | 895 | struct udp_sock *up = udp_sk(sk); |
1da177e4 | 896 | struct inet_sock *inet = inet_sk(sk); |
4c9483b2 | 897 | struct flowi6 *fl6 = &inet->cork.fl.u.ip6; |
1da177e4 | 898 | int err = 0; |
b2bf1e26 | 899 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 900 | __wsum csum = 0; |
1da177e4 LT |
901 | |
902 | /* Grab the skbuff where UDP header space exists. */ | |
903 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
904 | goto out; | |
905 | ||
906 | /* | |
907 | * Create a UDP header | |
908 | */ | |
4bedb452 | 909 | uh = udp_hdr(skb); |
1958b856 DM |
910 | uh->source = fl6->fl6_sport; |
911 | uh->dest = fl6->fl6_dport; | |
1da177e4 LT |
912 | uh->len = htons(up->len); |
913 | uh->check = 0; | |
914 | ||
b2bf1e26 | 915 | if (is_udplite) |
ba4e58ec | 916 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 | 917 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
4c9483b2 | 918 | udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, |
493c6be3 SS |
919 | up->len); |
920 | goto send; | |
921 | } else | |
ba4e58ec | 922 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 923 | |
ba4e58ec | 924 | /* add protocol-dependent pseudo-header */ |
4c9483b2 DM |
925 | uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
926 | up->len, fl6->flowi6_proto, csum); | |
1da177e4 | 927 | if (uh->check == 0) |
f6ab0288 | 928 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 929 | |
493c6be3 | 930 | send: |
1da177e4 | 931 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
932 | if (err) { |
933 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
934 | UDP6_INC_STATS_USER(sock_net(sk), | |
935 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
936 | err = 0; | |
937 | } | |
938 | } else | |
939 | UDP6_INC_STATS_USER(sock_net(sk), | |
940 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
941 | out: |
942 | up->len = 0; | |
943 | up->pending = 0; | |
944 | return err; | |
945 | } | |
946 | ||
ba4e58ec | 947 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
948 | struct msghdr *msg, size_t len) |
949 | { | |
950 | struct ipv6_txoptions opt_space; | |
951 | struct udp_sock *up = udp_sk(sk); | |
952 | struct inet_sock *inet = inet_sk(sk); | |
953 | struct ipv6_pinfo *np = inet6_sk(sk); | |
954 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 955 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
956 | struct ipv6_txoptions *opt = NULL; |
957 | struct ip6_flowlabel *flowlabel = NULL; | |
4c9483b2 | 958 | struct flowi6 fl6; |
1da177e4 LT |
959 | struct dst_entry *dst; |
960 | int addr_len = msg->msg_namelen; | |
961 | int ulen = len; | |
962 | int hlimit = -1; | |
41a1f8ea | 963 | int tclass = -1; |
13b52cd4 | 964 | int dontfrag = -1; |
1da177e4 LT |
965 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
966 | int err; | |
987905de | 967 | int connected = 0; |
b2bf1e26 | 968 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 969 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
970 | |
971 | /* destination address check */ | |
972 | if (sin6) { | |
973 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
974 | return -EINVAL; | |
975 | ||
976 | switch (sin6->sin6_family) { | |
977 | case AF_INET6: | |
978 | if (addr_len < SIN6_LEN_RFC2133) | |
979 | return -EINVAL; | |
980 | daddr = &sin6->sin6_addr; | |
981 | break; | |
982 | case AF_INET: | |
983 | goto do_udp_sendmsg; | |
984 | case AF_UNSPEC: | |
985 | msg->msg_name = sin6 = NULL; | |
986 | msg->msg_namelen = addr_len = 0; | |
987 | daddr = NULL; | |
988 | break; | |
989 | default: | |
990 | return -EINVAL; | |
991 | } | |
992 | } else if (!up->pending) { | |
993 | if (sk->sk_state != TCP_ESTABLISHED) | |
994 | return -EDESTADDRREQ; | |
995 | daddr = &np->daddr; | |
1ab1457c | 996 | } else |
1da177e4 LT |
997 | daddr = NULL; |
998 | ||
999 | if (daddr) { | |
e773e4fa | 1000 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
1001 | struct sockaddr_in sin; |
1002 | sin.sin_family = AF_INET; | |
c720c7e8 | 1003 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
1004 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
1005 | msg->msg_name = &sin; | |
1006 | msg->msg_namelen = sizeof(sin); | |
1007 | do_udp_sendmsg: | |
1008 | if (__ipv6_only_sock(sk)) | |
1009 | return -ENETUNREACH; | |
1010 | return udp_sendmsg(iocb, sk, msg, len); | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | if (up->pending == AF_INET) | |
1015 | return udp_sendmsg(iocb, sk, msg, len); | |
1016 | ||
1017 | /* Rough check on arithmetic overflow, | |
b59e139b | 1018 | better check is made in ip6_append_data(). |
1da177e4 LT |
1019 | */ |
1020 | if (len > INT_MAX - sizeof(struct udphdr)) | |
1021 | return -EMSGSIZE; | |
1ab1457c | 1022 | |
1da177e4 LT |
1023 | if (up->pending) { |
1024 | /* | |
1025 | * There are pending frames. | |
1026 | * The socket lock must be held while it's corked. | |
1027 | */ | |
1028 | lock_sock(sk); | |
1029 | if (likely(up->pending)) { | |
1030 | if (unlikely(up->pending != AF_INET6)) { | |
1031 | release_sock(sk); | |
1032 | return -EAFNOSUPPORT; | |
1033 | } | |
1034 | dst = NULL; | |
1035 | goto do_append_data; | |
1036 | } | |
1037 | release_sock(sk); | |
1038 | } | |
1039 | ulen += sizeof(struct udphdr); | |
1040 | ||
4c9483b2 | 1041 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 LT |
1042 | |
1043 | if (sin6) { | |
1044 | if (sin6->sin6_port == 0) | |
1045 | return -EINVAL; | |
1046 | ||
1958b856 | 1047 | fl6.fl6_dport = sin6->sin6_port; |
1da177e4 LT |
1048 | daddr = &sin6->sin6_addr; |
1049 | ||
1050 | if (np->sndflow) { | |
4c9483b2 DM |
1051 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1052 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
1053 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1054 | if (flowlabel == NULL) |
1055 | return -EINVAL; | |
1056 | daddr = &flowlabel->dst; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | /* | |
1061 | * Otherwise it will be difficult to maintain | |
1062 | * sk->sk_dst_cache. | |
1063 | */ | |
1064 | if (sk->sk_state == TCP_ESTABLISHED && | |
1065 | ipv6_addr_equal(daddr, &np->daddr)) | |
1066 | daddr = &np->daddr; | |
1067 | ||
1068 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1069 | sin6->sin6_scope_id && | |
1070 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) | |
4c9483b2 | 1071 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 LT |
1072 | } else { |
1073 | if (sk->sk_state != TCP_ESTABLISHED) | |
1074 | return -EDESTADDRREQ; | |
1075 | ||
1958b856 | 1076 | fl6.fl6_dport = inet->inet_dport; |
1da177e4 | 1077 | daddr = &np->daddr; |
4c9483b2 | 1078 | fl6.flowlabel = np->flow_label; |
987905de | 1079 | connected = 1; |
1da177e4 LT |
1080 | } |
1081 | ||
4c9483b2 DM |
1082 | if (!fl6.flowi6_oif) |
1083 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 | 1084 | |
4c9483b2 DM |
1085 | if (!fl6.flowi6_oif) |
1086 | fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; | |
9f690db7 | 1087 | |
4c9483b2 | 1088 | fl6.flowi6_mark = sk->sk_mark; |
51953d5b | 1089 | |
1da177e4 LT |
1090 | if (msg->msg_controllen) { |
1091 | opt = &opt_space; | |
1092 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1093 | opt->tot_len = sizeof(*opt); | |
1094 | ||
ec0506db MÅ» |
1095 | err = datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
1096 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
1097 | if (err < 0) { |
1098 | fl6_sock_release(flowlabel); | |
1099 | return err; | |
1100 | } | |
4c9483b2 DM |
1101 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1102 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1103 | if (flowlabel == NULL) |
1104 | return -EINVAL; | |
1105 | } | |
1106 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1107 | opt = NULL; | |
987905de | 1108 | connected = 0; |
1da177e4 LT |
1109 | } |
1110 | if (opt == NULL) | |
1111 | opt = np->opt; | |
df9890c3 YH |
1112 | if (flowlabel) |
1113 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1114 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1115 | |
4c9483b2 | 1116 | fl6.flowi6_proto = sk->sk_protocol; |
876c7f41 | 1117 | if (!ipv6_addr_any(daddr)) |
4c9483b2 | 1118 | ipv6_addr_copy(&fl6.daddr, daddr); |
876c7f41 | 1119 | else |
4c9483b2 DM |
1120 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
1121 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
1122 | ipv6_addr_copy(&fl6.saddr, &np->saddr); | |
1958b856 | 1123 | fl6.fl6_sport = inet->inet_sport; |
1ab1457c | 1124 | |
4c9483b2 | 1125 | final_p = fl6_update_dst(&fl6, opt, &final); |
20c59de2 | 1126 | if (final_p) |
987905de | 1127 | connected = 0; |
1da177e4 | 1128 | |
4c9483b2 DM |
1129 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { |
1130 | fl6.flowi6_oif = np->mcast_oif; | |
987905de MK |
1131 | connected = 0; |
1132 | } | |
1da177e4 | 1133 | |
4c9483b2 | 1134 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
beb8d13b | 1135 | |
4c9483b2 | 1136 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); |
68d0c6d3 DM |
1137 | if (IS_ERR(dst)) { |
1138 | err = PTR_ERR(dst); | |
1139 | dst = NULL; | |
1da177e4 | 1140 | goto out; |
14e50e57 | 1141 | } |
1da177e4 LT |
1142 | |
1143 | if (hlimit < 0) { | |
4c9483b2 | 1144 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
1da177e4 LT |
1145 | hlimit = np->mcast_hops; |
1146 | else | |
1147 | hlimit = np->hop_limit; | |
1148 | if (hlimit < 0) | |
6b75d090 | 1149 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1150 | } |
1151 | ||
e651f03a | 1152 | if (tclass < 0) |
41a1f8ea | 1153 | tclass = np->tclass; |
41a1f8ea | 1154 | |
13b52cd4 BH |
1155 | if (dontfrag < 0) |
1156 | dontfrag = np->dontfrag; | |
1157 | ||
1da177e4 LT |
1158 | if (msg->msg_flags&MSG_CONFIRM) |
1159 | goto do_confirm; | |
1160 | back_from_confirm: | |
1161 | ||
1162 | lock_sock(sk); | |
1163 | if (unlikely(up->pending)) { | |
1164 | /* The socket is already corked while preparing it. */ | |
1165 | /* ... which is an evident application bug. --ANK */ | |
1166 | release_sock(sk); | |
1167 | ||
64ce2073 | 1168 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1169 | err = -EINVAL; |
1170 | goto out; | |
1171 | } | |
1172 | ||
1173 | up->pending = AF_INET6; | |
1174 | ||
1175 | do_append_data: | |
1176 | up->len += ulen; | |
ba4e58ec GR |
1177 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1178 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
4c9483b2 | 1179 | sizeof(struct udphdr), hlimit, tclass, opt, &fl6, |
41a1f8ea | 1180 | (struct rt6_info*)dst, |
13b52cd4 | 1181 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1182 | if (err) |
1183 | udp_v6_flush_pending_frames(sk); | |
1184 | else if (!corkreq) | |
4c0a6cb0 | 1185 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1186 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1187 | up->pending = 0; | |
1da177e4 | 1188 | |
a5e7c210 DM |
1189 | if (dst) { |
1190 | if (connected) { | |
1191 | ip6_dst_store(sk, dst, | |
4c9483b2 | 1192 | ipv6_addr_equal(&fl6.daddr, &np->daddr) ? |
8e1ef0a9 YH |
1193 | &np->daddr : NULL, |
1194 | #ifdef CONFIG_IPV6_SUBTREES | |
4c9483b2 | 1195 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
8e1ef0a9 YH |
1196 | &np->saddr : |
1197 | #endif | |
1198 | NULL); | |
a5e7c210 DM |
1199 | } else { |
1200 | dst_release(dst); | |
1201 | } | |
a3c96089 | 1202 | dst = NULL; |
a5e7c210 DM |
1203 | } |
1204 | ||
1da177e4 LT |
1205 | if (err > 0) |
1206 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1207 | release_sock(sk); | |
1208 | out: | |
a3c96089 | 1209 | dst_release(dst); |
1da177e4 | 1210 | fl6_sock_release(flowlabel); |
cd562c98 | 1211 | if (!err) |
1da177e4 | 1212 | return len; |
a18135eb DM |
1213 | /* |
1214 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1215 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1216 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1217 | * things). We could add another new stat but at least for now that | |
1218 | * seems like overkill. | |
1219 | */ | |
1220 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1221 | UDP6_INC_STATS_USER(sock_net(sk), |
1222 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1223 | } |
1da177e4 LT |
1224 | return err; |
1225 | ||
1226 | do_confirm: | |
1227 | dst_confirm(dst); | |
1228 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1229 | goto back_from_confirm; | |
1230 | err = 0; | |
1231 | goto out; | |
1232 | } | |
1233 | ||
7d06b2e0 | 1234 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 LT |
1235 | { |
1236 | lock_sock(sk); | |
1237 | udp_v6_flush_pending_frames(sk); | |
1238 | release_sock(sk); | |
1239 | ||
1240 | inet6_destroy_sock(sk); | |
1da177e4 LT |
1241 | } |
1242 | ||
1243 | /* | |
1244 | * Socket option code for UDP | |
1245 | */ | |
ba4e58ec | 1246 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1247 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1248 | { |
db8dac20 | 1249 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1250 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1251 | udp_v6_push_pending_frames); | |
ba4e58ec | 1252 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1253 | } |
1254 | ||
1255 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1256 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1257 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1258 | { |
db8dac20 | 1259 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1260 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1261 | udp_v6_push_pending_frames); | |
ba4e58ec | 1262 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1263 | } |
1264 | #endif | |
1265 | ||
ba4e58ec GR |
1266 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1267 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1268 | { |
db8dac20 | 1269 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1270 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1271 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1272 | } |
1273 | ||
1274 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1275 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1276 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1277 | { |
db8dac20 | 1278 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1279 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1280 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1281 | } |
1282 | #endif | |
1283 | ||
ba735425 SS |
1284 | static int udp6_ufo_send_check(struct sk_buff *skb) |
1285 | { | |
b71d1d42 | 1286 | const struct ipv6hdr *ipv6h; |
ba735425 SS |
1287 | struct udphdr *uh; |
1288 | ||
1289 | if (!pskb_may_pull(skb, sizeof(*uh))) | |
1290 | return -EINVAL; | |
1291 | ||
1292 | ipv6h = ipv6_hdr(skb); | |
1293 | uh = udp_hdr(skb); | |
1294 | ||
1295 | uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, | |
1296 | IPPROTO_UDP, 0); | |
1297 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
1298 | skb->csum_offset = offsetof(struct udphdr, check); | |
1299 | skb->ip_summed = CHECKSUM_PARTIAL; | |
1300 | return 0; | |
1301 | } | |
1302 | ||
c8f44aff MM |
1303 | static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, |
1304 | netdev_features_t features) | |
ba735425 SS |
1305 | { |
1306 | struct sk_buff *segs = ERR_PTR(-EINVAL); | |
1307 | unsigned int mss; | |
1308 | unsigned int unfrag_ip6hlen, unfrag_len; | |
1309 | struct frag_hdr *fptr; | |
1310 | u8 *mac_start, *prevhdr; | |
1311 | u8 nexthdr; | |
1312 | u8 frag_hdr_sz = sizeof(struct frag_hdr); | |
1313 | int offset; | |
1314 | __wsum csum; | |
1315 | ||
1316 | mss = skb_shinfo(skb)->gso_size; | |
1317 | if (unlikely(skb->len <= mss)) | |
1318 | goto out; | |
1319 | ||
1320 | if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) { | |
1321 | /* Packet is from an untrusted source, reset gso_segs. */ | |
1322 | int type = skb_shinfo(skb)->gso_type; | |
1323 | ||
1324 | if (unlikely(type & ~(SKB_GSO_UDP | SKB_GSO_DODGY) || | |
1325 | !(type & (SKB_GSO_UDP)))) | |
1326 | goto out; | |
1327 | ||
1328 | skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss); | |
1329 | ||
1330 | segs = NULL; | |
1331 | goto out; | |
1332 | } | |
1333 | ||
1334 | /* Do software UFO. Complete and fill in the UDP checksum as HW cannot | |
1335 | * do checksum of UDP packets sent as multiple IP fragments. | |
1336 | */ | |
96339d6c | 1337 | offset = skb_checksum_start_offset(skb); |
ba735425 SS |
1338 | csum = skb_checksum(skb, offset, skb->len- offset, 0); |
1339 | offset += skb->csum_offset; | |
1340 | *(__sum16 *)(skb->data + offset) = csum_fold(csum); | |
1341 | skb->ip_summed = CHECKSUM_NONE; | |
1342 | ||
1343 | /* Check if there is enough headroom to insert fragment header. */ | |
a9cf73ea | 1344 | if ((skb_mac_header(skb) < skb->head + frag_hdr_sz) && |
ba735425 SS |
1345 | pskb_expand_head(skb, frag_hdr_sz, 0, GFP_ATOMIC)) |
1346 | goto out; | |
1347 | ||
1348 | /* Find the unfragmentable header and shift it left by frag_hdr_sz | |
1349 | * bytes to insert fragment header. | |
1350 | */ | |
1351 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); | |
1352 | nexthdr = *prevhdr; | |
1353 | *prevhdr = NEXTHDR_FRAGMENT; | |
1354 | unfrag_len = skb_network_header(skb) - skb_mac_header(skb) + | |
1355 | unfrag_ip6hlen; | |
1356 | mac_start = skb_mac_header(skb); | |
1357 | memmove(mac_start-frag_hdr_sz, mac_start, unfrag_len); | |
1358 | ||
1359 | skb->mac_header -= frag_hdr_sz; | |
1360 | skb->network_header -= frag_hdr_sz; | |
1361 | ||
1362 | fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen); | |
1363 | fptr->nexthdr = nexthdr; | |
1364 | fptr->reserved = 0; | |
87c48fa3 | 1365 | ipv6_select_ident(fptr, (struct rt6_info *)skb_dst(skb)); |
ba735425 SS |
1366 | |
1367 | /* Fragment the skb. ipv6 header and the remaining fields of the | |
1368 | * fragment header are updated in ipv6_gso_segment() | |
1369 | */ | |
1370 | segs = skb_segment(skb, features); | |
1371 | ||
1372 | out: | |
1373 | return segs; | |
1374 | } | |
1375 | ||
41135cc8 | 1376 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1377 | .handler = udpv6_rcv, |
1378 | .err_handler = udpv6_err, | |
ba735425 SS |
1379 | .gso_send_check = udp6_ufo_send_check, |
1380 | .gso_segment = udp6_ufo_fragment, | |
1da177e4 LT |
1381 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
1382 | }; | |
1383 | ||
1384 | /* ------------------------------------------------------------------------ */ | |
1385 | #ifdef CONFIG_PROC_FS | |
1386 | ||
1387 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1388 | { | |
1389 | struct inet_sock *inet = inet_sk(sp); | |
1390 | struct ipv6_pinfo *np = inet6_sk(sp); | |
b71d1d42 | 1391 | const struct in6_addr *dest, *src; |
1da177e4 LT |
1392 | __u16 destp, srcp; |
1393 | ||
1394 | dest = &np->daddr; | |
1395 | src = &np->rcv_saddr; | |
c720c7e8 ED |
1396 | destp = ntohs(inet->inet_dport); |
1397 | srcp = ntohs(inet->inet_sport); | |
1da177e4 | 1398 | seq_printf(seq, |
f86dcc5a | 1399 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
71338aa7 | 1400 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", |
1da177e4 LT |
1401 | bucket, |
1402 | src->s6_addr32[0], src->s6_addr32[1], | |
1403 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1404 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1405 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1406 | sp->sk_state, |
31e6d363 ED |
1407 | sk_wmem_alloc_get(sp), |
1408 | sk_rmem_alloc_get(sp), | |
1da177e4 LT |
1409 | 0, 0L, 0, |
1410 | sock_i_uid(sp), 0, | |
1411 | sock_i_ino(sp), | |
cb61cb9b ED |
1412 | atomic_read(&sp->sk_refcnt), sp, |
1413 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1414 | } |
1415 | ||
ba4e58ec | 1416 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1417 | { |
1418 | if (v == SEQ_START_TOKEN) | |
1419 | seq_printf(seq, | |
1420 | " sl " | |
1421 | "local_address " | |
1422 | "remote_address " | |
1423 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1424 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1425 | else |
1426 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1427 | return 0; | |
1428 | } | |
1429 | ||
73cb88ec AV |
1430 | static const struct file_operations udp6_afinfo_seq_fops = { |
1431 | .owner = THIS_MODULE, | |
1432 | .open = udp_seq_open, | |
1433 | .read = seq_read, | |
1434 | .llseek = seq_lseek, | |
1435 | .release = seq_release_net | |
1436 | }; | |
1437 | ||
1da177e4 | 1438 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1439 | .name = "udp6", |
1440 | .family = AF_INET6, | |
645ca708 | 1441 | .udp_table = &udp_table, |
73cb88ec | 1442 | .seq_fops = &udp6_afinfo_seq_fops, |
dda61925 DL |
1443 | .seq_ops = { |
1444 | .show = udp6_seq_show, | |
1445 | }, | |
1da177e4 LT |
1446 | }; |
1447 | ||
2c8c1e72 | 1448 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1449 | { |
0c96d8c5 | 1450 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1451 | } |
1452 | ||
0c96d8c5 DL |
1453 | void udp6_proc_exit(struct net *net) { |
1454 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1455 | } |
1456 | #endif /* CONFIG_PROC_FS */ | |
1457 | ||
1458 | /* ------------------------------------------------------------------------ */ | |
1459 | ||
1460 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1461 | .name = "UDPv6", |
1462 | .owner = THIS_MODULE, | |
ba4e58ec | 1463 | .close = udp_lib_close, |
543d9cfe ACM |
1464 | .connect = ip6_datagram_connect, |
1465 | .disconnect = udp_disconnect, | |
1466 | .ioctl = udp_ioctl, | |
1467 | .destroy = udpv6_destroy_sock, | |
1468 | .setsockopt = udpv6_setsockopt, | |
1469 | .getsockopt = udpv6_getsockopt, | |
1470 | .sendmsg = udpv6_sendmsg, | |
1471 | .recvmsg = udpv6_recvmsg, | |
1472 | .backlog_rcv = udpv6_queue_rcv_skb, | |
ba4e58ec GR |
1473 | .hash = udp_lib_hash, |
1474 | .unhash = udp_lib_unhash, | |
719f8358 | 1475 | .rehash = udp_v6_rehash, |
543d9cfe | 1476 | .get_port = udp_v6_get_port, |
95766fff HA |
1477 | .memory_allocated = &udp_memory_allocated, |
1478 | .sysctl_mem = sysctl_udp_mem, | |
1479 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1480 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1481 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1482 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1483 | .h.udp_table = &udp_table, |
3fdadf7d | 1484 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1485 | .compat_setsockopt = compat_udpv6_setsockopt, |
1486 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1487 | #endif |
fcbdf09d | 1488 | .clear_sk = sk_prot_clear_portaddr_nulls, |
1da177e4 LT |
1489 | }; |
1490 | ||
1da177e4 LT |
1491 | static struct inet_protosw udpv6_protosw = { |
1492 | .type = SOCK_DGRAM, | |
1493 | .protocol = IPPROTO_UDP, | |
1494 | .prot = &udpv6_prot, | |
1495 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1496 | .no_check = UDP_CSUM_DEFAULT, |
1497 | .flags = INET_PROTOSW_PERMANENT, | |
1498 | }; | |
1499 | ||
1500 | ||
7f4e4868 | 1501 | int __init udpv6_init(void) |
1da177e4 | 1502 | { |
7f4e4868 DL |
1503 | int ret; |
1504 | ||
1505 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1506 | if (ret) | |
1507 | goto out; | |
1508 | ||
1509 | ret = inet6_register_protosw(&udpv6_protosw); | |
1510 | if (ret) | |
1511 | goto out_udpv6_protocol; | |
1512 | out: | |
1513 | return ret; | |
1514 | ||
1515 | out_udpv6_protocol: | |
1516 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1517 | goto out; | |
1518 | } | |
1519 | ||
09f7709f | 1520 | void udpv6_exit(void) |
7f4e4868 DL |
1521 | { |
1522 | inet6_unregister_protosw(&udpv6_protosw); | |
1523 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1524 | } |