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> | |
72289b96 | 48 | #include <net/inet6_hashtables.h> |
076bb0c8 | 49 | #include <net/busy_poll.h> |
1da177e4 LT |
50 | |
51 | #include <linux/proc_fs.h> | |
52 | #include <linux/seq_file.h> | |
22911fc5 | 53 | #include <trace/events/skb.h> |
ba4e58ec | 54 | #include "udp_impl.h" |
1da177e4 | 55 | |
b2f5e7cd VY |
56 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
57 | { | |
58 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
59 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); | |
68835aba ED |
60 | __be32 sk1_rcv_saddr = sk_rcv_saddr(sk); |
61 | __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2); | |
b2f5e7cd VY |
62 | int sk_ipv6only = ipv6_only_sock(sk); |
63 | int sk2_ipv6only = inet_v6_ipv6only(sk2); | |
64 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); | |
65 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
66 | ||
67 | /* if both are mapped, treat as IPv4 */ | |
68 | if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) | |
499923c7 | 69 | return (!sk2_ipv6only && |
c720c7e8 ED |
70 | (!sk1_rcv_saddr || !sk2_rcv_saddr || |
71 | sk1_rcv_saddr == sk2_rcv_saddr)); | |
b2f5e7cd VY |
72 | |
73 | if (addr_type2 == IPV6_ADDR_ANY && | |
74 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
75 | return 1; | |
76 | ||
77 | if (addr_type == IPV6_ADDR_ANY && | |
78 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
79 | return 1; | |
80 | ||
81 | if (sk2_rcv_saddr6 && | |
82 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
83 | return 1; | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
d4cada4a ED |
88 | static unsigned int udp6_portaddr_hash(struct net *net, |
89 | const struct in6_addr *addr6, | |
90 | unsigned int port) | |
91 | { | |
92 | unsigned int hash, mix = net_hash_mix(net); | |
93 | ||
94 | if (ipv6_addr_any(addr6)) | |
95 | hash = jhash_1word(0, mix); | |
856540ee | 96 | else if (ipv6_addr_v4mapped(addr6)) |
0eae88f3 | 97 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
d4cada4a | 98 | else |
0eae88f3 | 99 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
d4cada4a ED |
100 | |
101 | return hash ^ port; | |
102 | } | |
103 | ||
104 | ||
6ba5a3c5 | 105 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 106 | { |
30fff923 ED |
107 | unsigned int hash2_nulladdr = |
108 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); | |
9a52e97e | 109 | unsigned int hash2_partial = |
30fff923 ED |
110 | udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); |
111 | ||
d4cada4a | 112 | /* precompute partial secondary hash */ |
30fff923 ED |
113 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
114 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); | |
1da177e4 LT |
115 | } |
116 | ||
719f8358 ED |
117 | static void udp_v6_rehash(struct sock *sk) |
118 | { | |
119 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), | |
120 | &inet6_sk(sk)->rcv_saddr, | |
121 | inet_sk(sk)->inet_num); | |
122 | ||
123 | udp_lib_rehash(sk, new_hash); | |
124 | } | |
125 | ||
645ca708 ED |
126 | static inline int compute_score(struct sock *sk, struct net *net, |
127 | unsigned short hnum, | |
88440ae7 BS |
128 | const struct in6_addr *saddr, __be16 sport, |
129 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 ED |
130 | int dif) |
131 | { | |
132 | int score = -1; | |
133 | ||
d4cada4a | 134 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
645ca708 ED |
135 | sk->sk_family == PF_INET6) { |
136 | struct ipv6_pinfo *np = inet6_sk(sk); | |
137 | struct inet_sock *inet = inet_sk(sk); | |
138 | ||
139 | score = 0; | |
c720c7e8 ED |
140 | if (inet->inet_dport) { |
141 | if (inet->inet_dport != sport) | |
645ca708 ED |
142 | return -1; |
143 | score++; | |
144 | } | |
145 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
146 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
147 | return -1; | |
148 | score++; | |
149 | } | |
150 | if (!ipv6_addr_any(&np->daddr)) { | |
151 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
152 | return -1; | |
153 | score++; | |
154 | } | |
155 | if (sk->sk_bound_dev_if) { | |
156 | if (sk->sk_bound_dev_if != dif) | |
157 | return -1; | |
158 | score++; | |
159 | } | |
160 | } | |
161 | return score; | |
162 | } | |
163 | ||
fddc17de ED |
164 | #define SCORE2_MAX (1 + 1 + 1) |
165 | static inline int compute_score2(struct sock *sk, struct net *net, | |
166 | const struct in6_addr *saddr, __be16 sport, | |
167 | const struct in6_addr *daddr, unsigned short hnum, | |
168 | int dif) | |
169 | { | |
170 | int score = -1; | |
171 | ||
172 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && | |
173 | sk->sk_family == PF_INET6) { | |
174 | struct ipv6_pinfo *np = inet6_sk(sk); | |
175 | struct inet_sock *inet = inet_sk(sk); | |
176 | ||
177 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
178 | return -1; | |
179 | score = 0; | |
180 | if (inet->inet_dport) { | |
181 | if (inet->inet_dport != sport) | |
182 | return -1; | |
183 | score++; | |
184 | } | |
185 | if (!ipv6_addr_any(&np->daddr)) { | |
186 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
187 | return -1; | |
188 | score++; | |
189 | } | |
190 | if (sk->sk_bound_dev_if) { | |
191 | if (sk->sk_bound_dev_if != dif) | |
192 | return -1; | |
193 | score++; | |
194 | } | |
195 | } | |
196 | return score; | |
197 | } | |
198 | ||
fddc17de ED |
199 | |
200 | /* called with read_rcu_lock() */ | |
201 | static struct sock *udp6_lib_lookup2(struct net *net, | |
202 | const struct in6_addr *saddr, __be16 sport, | |
203 | const struct in6_addr *daddr, unsigned int hnum, int dif, | |
204 | struct udp_hslot *hslot2, unsigned int slot2) | |
205 | { | |
206 | struct sock *sk, *result; | |
207 | struct hlist_nulls_node *node; | |
72289b96 TH |
208 | int score, badness, matches = 0, reuseport = 0; |
209 | u32 hash = 0; | |
fddc17de ED |
210 | |
211 | begin: | |
212 | result = NULL; | |
213 | badness = -1; | |
214 | udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { | |
215 | score = compute_score2(sk, net, saddr, sport, | |
216 | daddr, hnum, dif); | |
217 | if (score > badness) { | |
218 | result = sk; | |
219 | badness = score; | |
72289b96 TH |
220 | reuseport = sk->sk_reuseport; |
221 | if (reuseport) { | |
222 | hash = inet6_ehashfn(net, daddr, hnum, | |
223 | saddr, sport); | |
224 | matches = 1; | |
225 | } else if (score == SCORE2_MAX) | |
fddc17de | 226 | goto exact_match; |
72289b96 TH |
227 | } else if (score == badness && reuseport) { |
228 | matches++; | |
229 | if (((u64)hash * matches) >> 32 == 0) | |
230 | result = sk; | |
231 | hash = next_pseudo_random32(hash); | |
fddc17de ED |
232 | } |
233 | } | |
234 | /* | |
235 | * if the nulls value we got at the end of this lookup is | |
236 | * not the expected one, we must restart lookup. | |
237 | * We probably met an item that was moved to another chain. | |
238 | */ | |
239 | if (get_nulls_value(node) != slot2) | |
240 | goto begin; | |
241 | ||
242 | if (result) { | |
243 | exact_match: | |
c31504dc | 244 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
fddc17de ED |
245 | result = NULL; |
246 | else if (unlikely(compute_score2(result, net, saddr, sport, | |
247 | daddr, hnum, dif) < badness)) { | |
248 | sock_put(result); | |
249 | goto begin; | |
250 | } | |
251 | } | |
252 | return result; | |
253 | } | |
254 | ||
fce82338 | 255 | struct sock *__udp6_lib_lookup(struct net *net, |
88440ae7 BS |
256 | const struct in6_addr *saddr, __be16 sport, |
257 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 | 258 | int dif, struct udp_table *udptable) |
1da177e4 | 259 | { |
271b72c7 | 260 | struct sock *sk, *result; |
88ab1932 | 261 | struct hlist_nulls_node *node; |
1da177e4 | 262 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
263 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
264 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
72289b96 TH |
265 | int score, badness, matches = 0, reuseport = 0; |
266 | u32 hash = 0; | |
645ca708 | 267 | |
271b72c7 | 268 | rcu_read_lock(); |
fddc17de ED |
269 | if (hslot->count > 10) { |
270 | hash2 = udp6_portaddr_hash(net, daddr, hnum); | |
271 | slot2 = hash2 & udptable->mask; | |
272 | hslot2 = &udptable->hash2[slot2]; | |
273 | if (hslot->count < hslot2->count) | |
274 | goto begin; | |
275 | ||
276 | result = udp6_lib_lookup2(net, saddr, sport, | |
277 | daddr, hnum, dif, | |
278 | hslot2, slot2); | |
279 | if (!result) { | |
280 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); | |
281 | slot2 = hash2 & udptable->mask; | |
282 | hslot2 = &udptable->hash2[slot2]; | |
283 | if (hslot->count < hslot2->count) | |
284 | goto begin; | |
285 | ||
1223c67c JBD |
286 | result = udp6_lib_lookup2(net, saddr, sport, |
287 | &in6addr_any, hnum, dif, | |
fddc17de ED |
288 | hslot2, slot2); |
289 | } | |
290 | rcu_read_unlock(); | |
291 | return result; | |
292 | } | |
271b72c7 ED |
293 | begin: |
294 | result = NULL; | |
295 | badness = -1; | |
88ab1932 | 296 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
297 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
298 | if (score > badness) { | |
299 | result = sk; | |
300 | badness = score; | |
72289b96 TH |
301 | reuseport = sk->sk_reuseport; |
302 | if (reuseport) { | |
303 | hash = inet6_ehashfn(net, daddr, hnum, | |
304 | saddr, sport); | |
305 | matches = 1; | |
306 | } | |
307 | } else if (score == badness && reuseport) { | |
308 | matches++; | |
309 | if (((u64)hash * matches) >> 32 == 0) | |
310 | result = sk; | |
311 | hash = next_pseudo_random32(hash); | |
1da177e4 LT |
312 | } |
313 | } | |
88ab1932 ED |
314 | /* |
315 | * if the nulls value we got at the end of this lookup is | |
316 | * not the expected one, we must restart lookup. | |
317 | * We probably met an item that was moved to another chain. | |
318 | */ | |
fddc17de | 319 | if (get_nulls_value(node) != slot) |
88ab1932 ED |
320 | goto begin; |
321 | ||
271b72c7 | 322 | if (result) { |
c31504dc | 323 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
271b72c7 ED |
324 | result = NULL; |
325 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
326 | daddr, dport, dif) < badness)) { | |
327 | sock_put(result); | |
328 | goto begin; | |
329 | } | |
330 | } | |
331 | rcu_read_unlock(); | |
1da177e4 LT |
332 | return result; |
333 | } | |
fce82338 | 334 | EXPORT_SYMBOL_GPL(__udp6_lib_lookup); |
1da177e4 | 335 | |
607c4aaf KK |
336 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
337 | __be16 sport, __be16 dport, | |
645ca708 | 338 | struct udp_table *udptable) |
607c4aaf | 339 | { |
23542618 | 340 | struct sock *sk; |
b71d1d42 | 341 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
607c4aaf | 342 | |
23542618 KK |
343 | if (unlikely(sk = skb_steal_sock(skb))) |
344 | return sk; | |
adf30907 ED |
345 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
346 | &iph->daddr, dport, inet6_iif(skb), | |
347 | udptable); | |
607c4aaf KK |
348 | } |
349 | ||
aa976fc0 BS |
350 | struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, |
351 | const struct in6_addr *daddr, __be16 dport, int dif) | |
352 | { | |
353 | return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); | |
354 | } | |
355 | EXPORT_SYMBOL_GPL(udp6_lib_lookup); | |
356 | ||
357 | ||
1da177e4 LT |
358 | /* |
359 | * This should be easy, if there is something there we | |
360 | * return it, otherwise we block. | |
361 | */ | |
362 | ||
ba4e58ec | 363 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
364 | struct msghdr *msg, size_t len, |
365 | int noblock, int flags, int *addr_len) | |
366 | { | |
367 | struct ipv6_pinfo *np = inet6_sk(sk); | |
368 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 369 | struct sk_buff *skb; |
59c2cdae | 370 | unsigned int ulen, copied; |
3f518bf7 | 371 | int peeked, off = 0; |
759e5d00 HX |
372 | int err; |
373 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 374 | int is_udp4; |
8a74ad60 | 375 | bool slow; |
1da177e4 | 376 | |
1ab1457c | 377 | if (addr_len) |
3dde2598 | 378 | *addr_len = sizeof(struct sockaddr_in6); |
1ab1457c | 379 | |
1da177e4 LT |
380 | if (flags & MSG_ERRQUEUE) |
381 | return ipv6_recv_error(sk, msg, len); | |
382 | ||
4b340ae2 BH |
383 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
384 | return ipv6_recv_rxpmtu(sk, msg, len); | |
385 | ||
1da177e4 | 386 | try_again: |
a59322be | 387 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
3f518bf7 | 388 | &peeked, &off, &err); |
1da177e4 LT |
389 | if (!skb) |
390 | goto out; | |
391 | ||
759e5d00 | 392 | ulen = skb->len - sizeof(struct udphdr); |
59c2cdae DM |
393 | copied = len; |
394 | if (copied > ulen) | |
395 | copied = ulen; | |
396 | else if (copied < ulen) | |
1ab1457c | 397 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 398 | |
f26ba175 WY |
399 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
400 | ||
ba4e58ec | 401 | /* |
759e5d00 HX |
402 | * If checksum is needed at all, try to do it while copying the |
403 | * data. If the data is truncated, or if we only want a partial | |
404 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 405 | */ |
ba4e58ec | 406 | |
59c2cdae | 407 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
759e5d00 | 408 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 409 | goto csum_copy_err; |
ba4e58ec GR |
410 | } |
411 | ||
60476372 | 412 | if (skb_csum_unnecessary(skb)) |
ba4e58ec | 413 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
22911fc5 | 414 | msg->msg_iov, copied); |
ba4e58ec | 415 | else { |
1da177e4 LT |
416 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
417 | if (err == -EINVAL) | |
418 | goto csum_copy_err; | |
419 | } | |
22911fc5 ED |
420 | if (unlikely(err)) { |
421 | trace_kfree_skb(skb, udpv6_recvmsg); | |
979402b1 ED |
422 | if (!peeked) { |
423 | atomic_inc(&sk->sk_drops); | |
424 | if (is_udp4) | |
425 | UDP_INC_STATS_USER(sock_net(sk), | |
426 | UDP_MIB_INERRORS, | |
427 | is_udplite); | |
428 | else | |
429 | UDP6_INC_STATS_USER(sock_net(sk), | |
430 | UDP_MIB_INERRORS, | |
431 | is_udplite); | |
432 | } | |
1da177e4 | 433 | goto out_free; |
22911fc5 | 434 | } |
f26ba175 WY |
435 | if (!peeked) { |
436 | if (is_udp4) | |
437 | UDP_INC_STATS_USER(sock_net(sk), | |
438 | UDP_MIB_INDATAGRAMS, is_udplite); | |
439 | else | |
440 | UDP6_INC_STATS_USER(sock_net(sk), | |
441 | UDP_MIB_INDATAGRAMS, is_udplite); | |
442 | } | |
cb75994e | 443 | |
3b885787 | 444 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
445 | |
446 | /* Copy the address. */ | |
447 | if (msg->msg_name) { | |
448 | struct sockaddr_in6 *sin6; | |
1ab1457c | 449 | |
1da177e4 LT |
450 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
451 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 452 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 | 453 | sin6->sin6_flowinfo = 0; |
1da177e4 | 454 | |
842df073 | 455 | if (is_udp4) { |
b301e82c BH |
456 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
457 | &sin6->sin6_addr); | |
842df073 HFS |
458 | sin6->sin6_scope_id = 0; |
459 | } else { | |
4e3fd7a0 | 460 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
842df073 HFS |
461 | sin6->sin6_scope_id = |
462 | ipv6_iface_scope_id(&sin6->sin6_addr, | |
463 | IP6CB(skb)->iif); | |
1da177e4 LT |
464 | } |
465 | ||
466 | } | |
f26ba175 | 467 | if (is_udp4) { |
1da177e4 LT |
468 | if (inet->cmsg_flags) |
469 | ip_cmsg_recv(msg, skb); | |
470 | } else { | |
471 | if (np->rxopt.all) | |
73df66f8 | 472 | ip6_datagram_recv_ctl(sk, msg, skb); |
1ab1457c | 473 | } |
1da177e4 | 474 | |
59c2cdae | 475 | err = copied; |
1da177e4 | 476 | if (flags & MSG_TRUNC) |
759e5d00 | 477 | err = ulen; |
1da177e4 LT |
478 | |
479 | out_free: | |
9d410c79 | 480 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
481 | out: |
482 | return err; | |
483 | ||
484 | csum_copy_err: | |
8a74ad60 | 485 | slow = lock_sock_fast(sk); |
0856f939 | 486 | if (!skb_kill_datagram(sk, skb, flags)) { |
6a5dc9e5 ED |
487 | if (is_udp4) { |
488 | UDP_INC_STATS_USER(sock_net(sk), | |
489 | UDP_MIB_CSUMERRORS, is_udplite); | |
0856f939 WY |
490 | UDP_INC_STATS_USER(sock_net(sk), |
491 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 ED |
492 | } else { |
493 | UDP6_INC_STATS_USER(sock_net(sk), | |
494 | UDP_MIB_CSUMERRORS, is_udplite); | |
0856f939 WY |
495 | UDP6_INC_STATS_USER(sock_net(sk), |
496 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 | 497 | } |
0856f939 | 498 | } |
8a74ad60 | 499 | unlock_sock_fast(sk, slow); |
1da177e4 | 500 | |
32c90254 | 501 | if (noblock) |
1da177e4 | 502 | return -EAGAIN; |
9cfaa8de XZ |
503 | |
504 | /* starting over for a new packet */ | |
505 | msg->msg_flags &= ~MSG_TRUNC; | |
1da177e4 LT |
506 | goto try_again; |
507 | } | |
508 | ||
ba4e58ec | 509 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 510 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 511 | struct udp_table *udptable) |
1da177e4 LT |
512 | { |
513 | struct ipv6_pinfo *np; | |
b71d1d42 ED |
514 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
515 | const struct in6_addr *saddr = &hdr->saddr; | |
516 | const struct in6_addr *daddr = &hdr->daddr; | |
1da177e4 LT |
517 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); |
518 | struct sock *sk; | |
519 | int err; | |
520 | ||
c346dca1 | 521 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 522 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
523 | if (sk == NULL) |
524 | return; | |
525 | ||
81aded24 DM |
526 | if (type == ICMPV6_PKT_TOOBIG) |
527 | ip6_sk_update_pmtu(skb, sk, info); | |
ec18d9a2 DM |
528 | if (type == NDISC_REDIRECT) |
529 | ip6_sk_redirect(skb, sk); | |
81aded24 | 530 | |
1da177e4 LT |
531 | np = inet6_sk(sk); |
532 | ||
533 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
534 | goto out; | |
535 | ||
536 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
537 | goto out; | |
538 | ||
b1faf566 | 539 | if (np->recverr) |
1da177e4 | 540 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
b1faf566 | 541 | |
1da177e4 LT |
542 | sk->sk_err = err; |
543 | sk->sk_error_report(sk); | |
544 | out: | |
545 | sock_put(sk); | |
546 | } | |
547 | ||
f7ad74fe BL |
548 | static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
549 | { | |
550 | int rc; | |
551 | ||
552 | if (!ipv6_addr_any(&inet6_sk(sk)->daddr)) | |
553 | sock_rps_save_rxhash(sk, skb); | |
554 | ||
555 | rc = sock_queue_rcv_skb(sk, skb); | |
556 | if (rc < 0) { | |
557 | int is_udplite = IS_UDPLITE(sk); | |
558 | ||
559 | /* Note that an ENOMEM error is charged twice */ | |
560 | if (rc == -ENOMEM) | |
561 | UDP6_INC_STATS_BH(sock_net(sk), | |
562 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
563 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); | |
564 | kfree_skb(skb); | |
565 | return -1; | |
566 | } | |
567 | return 0; | |
568 | } | |
569 | ||
ba4e58ec | 570 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
571 | struct inet6_skb_parm *opt, u8 type, |
572 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 573 | { |
645ca708 | 574 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
575 | } |
576 | ||
d7f3f621 BL |
577 | static struct static_key udpv6_encap_needed __read_mostly; |
578 | void udpv6_encap_enable(void) | |
579 | { | |
580 | if (!static_key_enabled(&udpv6_encap_needed)) | |
581 | static_key_slow_inc(&udpv6_encap_needed); | |
582 | } | |
583 | EXPORT_SYMBOL(udpv6_encap_enable); | |
584 | ||
f7ad74fe | 585 | int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 586 | { |
ba4e58ec | 587 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 588 | int rc; |
b2bf1e26 | 589 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 590 | |
ba4e58ec GR |
591 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
592 | goto drop; | |
1da177e4 | 593 | |
d7f3f621 BL |
594 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
595 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
596 | ||
597 | /* | |
598 | * This is an encapsulation socket so pass the skb to | |
599 | * the socket's udp_encap_rcv() hook. Otherwise, just | |
600 | * fall through and pass this up the UDP socket. | |
601 | * up->encap_rcv() returns the following value: | |
602 | * =0 if skb was successfully passed to the encap | |
603 | * handler or was discarded by it. | |
604 | * >0 if skb should be passed on to UDP. | |
605 | * <0 if skb should be resubmitted as proto -N | |
606 | */ | |
607 | ||
608 | /* if we're overly short, let UDP handle it */ | |
609 | encap_rcv = ACCESS_ONCE(up->encap_rcv); | |
610 | if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) { | |
611 | int ret; | |
612 | ||
613 | ret = encap_rcv(sk, skb); | |
614 | if (ret <= 0) { | |
615 | UDP_INC_STATS_BH(sock_net(sk), | |
616 | UDP_MIB_INDATAGRAMS, | |
617 | is_udplite); | |
618 | return -ret; | |
619 | } | |
620 | } | |
621 | ||
622 | /* FALLTHROUGH -- it's a UDP Packet */ | |
623 | } | |
624 | ||
ba4e58ec GR |
625 | /* |
626 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
627 | */ | |
b2bf1e26 | 628 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
629 | |
630 | if (up->pcrlen == 0) { /* full coverage was set */ | |
631 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
632 | " %d while full coverage %d requested\n", | |
633 | UDP_SKB_CB(skb)->cscov, skb->len); | |
634 | goto drop; | |
635 | } | |
636 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
637 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
638 | "too small, need min %d\n", | |
639 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
640 | goto drop; | |
641 | } | |
1da177e4 LT |
642 | } |
643 | ||
33d480ce | 644 | if (rcu_access_pointer(sk->sk_filter)) { |
1ab6eb62 | 645 | if (udp_lib_checksum_complete(skb)) |
6a5dc9e5 | 646 | goto csum_error; |
1ab6eb62 | 647 | } |
ba4e58ec | 648 | |
cb80ef46 BL |
649 | if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) |
650 | goto drop; | |
651 | ||
d826eb14 | 652 | skb_dst_drop(skb); |
cb75994e | 653 | |
cb80ef46 BL |
654 | bh_lock_sock(sk); |
655 | rc = 0; | |
656 | if (!sock_owned_by_user(sk)) | |
657 | rc = __udpv6_queue_rcv_skb(sk, skb); | |
658 | else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { | |
659 | bh_unlock_sock(sk); | |
660 | goto drop; | |
661 | } | |
662 | bh_unlock_sock(sk); | |
f7ad74fe BL |
663 | |
664 | return rc; | |
6a5dc9e5 ED |
665 | csum_error: |
666 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); | |
ba4e58ec | 667 | drop: |
ef28d1a2 | 668 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
cb80ef46 | 669 | atomic_inc(&sk->sk_drops); |
ba4e58ec GR |
670 | kfree_skb(skb); |
671 | return -1; | |
1da177e4 LT |
672 | } |
673 | ||
920a4611 | 674 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
b71d1d42 ED |
675 | __be16 loc_port, const struct in6_addr *loc_addr, |
676 | __be16 rmt_port, const struct in6_addr *rmt_addr, | |
1da177e4 LT |
677 | int dif) |
678 | { | |
88ab1932 | 679 | struct hlist_nulls_node *node; |
1da177e4 LT |
680 | struct sock *s = sk; |
681 | unsigned short num = ntohs(loc_port); | |
682 | ||
88ab1932 | 683 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
684 | struct inet_sock *inet = inet_sk(s); |
685 | ||
920a4611 | 686 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
687 | continue; |
688 | ||
d4cada4a ED |
689 | if (udp_sk(s)->udp_port_hash == num && |
690 | s->sk_family == PF_INET6) { | |
1da177e4 | 691 | struct ipv6_pinfo *np = inet6_sk(s); |
c720c7e8 ED |
692 | if (inet->inet_dport) { |
693 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
694 | continue; |
695 | } | |
696 | if (!ipv6_addr_any(&np->daddr) && | |
697 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
698 | continue; | |
699 | ||
700 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
701 | continue; | |
702 | ||
703 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
704 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
705 | continue; | |
1da177e4 | 706 | } |
add459aa | 707 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
708 | continue; |
709 | return s; | |
710 | } | |
711 | } | |
712 | return NULL; | |
713 | } | |
714 | ||
a1ab77f9 ED |
715 | static void flush_stack(struct sock **stack, unsigned int count, |
716 | struct sk_buff *skb, unsigned int final) | |
717 | { | |
cb80ef46 | 718 | struct sk_buff *skb1 = NULL; |
a1ab77f9 | 719 | struct sock *sk; |
cb80ef46 | 720 | unsigned int i; |
a1ab77f9 ED |
721 | |
722 | for (i = 0; i < count; i++) { | |
f6b8f32c | 723 | sk = stack[i]; |
cb80ef46 BL |
724 | if (likely(skb1 == NULL)) |
725 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
726 | if (!skb1) { | |
727 | atomic_inc(&sk->sk_drops); | |
728 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS, | |
729 | IS_UDPLITE(sk)); | |
730 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, | |
731 | IS_UDPLITE(sk)); | |
a1ab77f9 | 732 | } |
cb80ef46 BL |
733 | |
734 | if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) | |
735 | skb1 = NULL; | |
a1ab77f9 | 736 | } |
cb80ef46 BL |
737 | if (unlikely(skb1)) |
738 | kfree_skb(skb1); | |
a1ab77f9 | 739 | } |
1da177e4 LT |
740 | /* |
741 | * Note: called only from the BH handler context, | |
742 | * so we don't need to lock the hashes. | |
743 | */ | |
e3163493 | 744 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
b71d1d42 | 745 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
645ca708 | 746 | struct udp_table *udptable) |
1da177e4 | 747 | { |
a1ab77f9 | 748 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 749 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 750 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 751 | int dif; |
a1ab77f9 | 752 | unsigned int i, count = 0; |
1da177e4 | 753 | |
645ca708 | 754 | spin_lock(&hslot->lock); |
88ab1932 | 755 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 756 | dif = inet6_iif(skb); |
920a4611 | 757 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
758 | while (sk) { |
759 | stack[count++] = sk; | |
760 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
761 | uh->source, saddr, dif); | |
762 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
763 | if (!sk) | |
764 | break; | |
765 | flush_stack(stack, count, skb, ~0); | |
766 | count = 0; | |
95766fff | 767 | } |
1da177e4 | 768 | } |
a1ab77f9 ED |
769 | /* |
770 | * before releasing the lock, we must take reference on sockets | |
771 | */ | |
772 | for (i = 0; i < count; i++) | |
773 | sock_hold(stack[i]); | |
774 | ||
645ca708 | 775 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
776 | |
777 | if (count) { | |
778 | flush_stack(stack, count, skb, count - 1); | |
779 | ||
780 | for (i = 0; i < count; i++) | |
781 | sock_put(stack[i]); | |
782 | } else { | |
783 | kfree_skb(skb); | |
784 | } | |
ba4e58ec | 785 | return 0; |
1da177e4 LT |
786 | } |
787 | ||
645ca708 | 788 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 789 | int proto) |
1da177e4 | 790 | { |
3ffe533c | 791 | struct net *net = dev_net(skb->dev); |
1da177e4 | 792 | struct sock *sk; |
1ab1457c | 793 | struct udphdr *uh; |
b71d1d42 | 794 | const struct in6_addr *saddr, *daddr; |
1da177e4 LT |
795 | u32 ulen = 0; |
796 | ||
797 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 798 | goto discard; |
1da177e4 | 799 | |
0660e03f ACM |
800 | saddr = &ipv6_hdr(skb)->saddr; |
801 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 802 | uh = udp_hdr(skb); |
1da177e4 LT |
803 | |
804 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
805 | if (ulen > skb->len) |
806 | goto short_packet; | |
1da177e4 | 807 | |
759e5d00 HX |
808 | if (proto == IPPROTO_UDP) { |
809 | /* UDP validates ulen. */ | |
1da177e4 | 810 | |
ba4e58ec GR |
811 | /* Check for jumbo payload */ |
812 | if (ulen == 0) | |
813 | ulen = skb->len; | |
1da177e4 | 814 | |
ba4e58ec GR |
815 | if (ulen < sizeof(*uh)) |
816 | goto short_packet; | |
1da177e4 | 817 | |
ba4e58ec GR |
818 | if (ulen < skb->len) { |
819 | if (pskb_trim_rcsum(skb, ulen)) | |
820 | goto short_packet; | |
0660e03f ACM |
821 | saddr = &ipv6_hdr(skb)->saddr; |
822 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 823 | uh = udp_hdr(skb); |
ba4e58ec | 824 | } |
ba4e58ec | 825 | } |
1da177e4 | 826 | |
759e5d00 | 827 | if (udp6_csum_init(skb, uh, proto)) |
6a5dc9e5 | 828 | goto csum_error; |
759e5d00 | 829 | |
1ab1457c YH |
830 | /* |
831 | * Multicast receive code | |
1da177e4 | 832 | */ |
ba4e58ec | 833 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
834 | return __udp6_lib_mcast_deliver(net, skb, |
835 | saddr, daddr, udptable); | |
1da177e4 LT |
836 | |
837 | /* Unicast */ | |
838 | ||
1ab1457c | 839 | /* |
1da177e4 LT |
840 | * check socket cache ... must talk to Alan about his plans |
841 | * for sock caches... i'll skip this for now. | |
842 | */ | |
607c4aaf | 843 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
cb80ef46 | 844 | if (sk != NULL) { |
a5b50476 ET |
845 | int ret; |
846 | ||
8b80cda5 | 847 | sk_mark_napi_id(sk, skb); |
a5b50476 | 848 | ret = udpv6_queue_rcv_skb(sk, skb); |
cb80ef46 | 849 | sock_put(sk); |
1da177e4 | 850 | |
cb80ef46 BL |
851 | /* a return value > 0 means to resubmit the input, but |
852 | * it wants the return to be -protocol, or 0 | |
853 | */ | |
854 | if (ret > 0) | |
855 | return -ret; | |
1da177e4 | 856 | |
add459aa | 857 | return 0; |
1da177e4 | 858 | } |
1ab1457c | 859 | |
cb80ef46 | 860 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
c377411f | 861 | goto discard; |
cb80ef46 BL |
862 | |
863 | if (udp_lib_checksum_complete(skb)) | |
6a5dc9e5 | 864 | goto csum_error; |
cb80ef46 BL |
865 | |
866 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); | |
867 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); | |
868 | ||
869 | kfree_skb(skb); | |
add459aa | 870 | return 0; |
1da177e4 | 871 | |
1ab1457c | 872 | short_packet: |
d6bc0149 | 873 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 874 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
875 | saddr, |
876 | ntohs(uh->source), | |
877 | ulen, | |
878 | skb->len, | |
879 | daddr, | |
880 | ntohs(uh->dest)); | |
6a5dc9e5 ED |
881 | goto discard; |
882 | csum_error: | |
883 | UDP6_INC_STATS_BH(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); | |
1da177e4 | 884 | discard: |
ef28d1a2 | 885 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 886 | kfree_skb(skb); |
add459aa | 887 | return 0; |
1da177e4 | 888 | } |
ba4e58ec | 889 | |
e5bbef20 | 890 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 891 | { |
645ca708 | 892 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
893 | } |
894 | ||
1da177e4 LT |
895 | /* |
896 | * Throw away all pending data and cancel the corking. Socket is locked. | |
897 | */ | |
898 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
899 | { | |
900 | struct udp_sock *up = udp_sk(sk); | |
901 | ||
36d926b9 DL |
902 | if (up->pending == AF_INET) |
903 | udp_flush_pending_frames(sk); | |
904 | else if (up->pending) { | |
1da177e4 LT |
905 | up->len = 0; |
906 | up->pending = 0; | |
907 | ip6_flush_pending_frames(sk); | |
1ab1457c | 908 | } |
1da177e4 LT |
909 | } |
910 | ||
493c6be3 SS |
911 | /** |
912 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
913 | * @sk: socket we are sending on | |
914 | * @skb: sk_buff containing the filled-in UDP header | |
915 | * (checksum field must be zeroed out) | |
916 | */ | |
917 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
918 | const struct in6_addr *saddr, | |
919 | const struct in6_addr *daddr, int len) | |
920 | { | |
921 | unsigned int offset; | |
922 | struct udphdr *uh = udp_hdr(skb); | |
923 | __wsum csum = 0; | |
924 | ||
925 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
926 | /* Only one fragment on the socket. */ | |
927 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
928 | skb->csum_offset = offsetof(struct udphdr, check); | |
929 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
930 | } else { | |
931 | /* | |
932 | * HW-checksum won't work as there are two or more | |
933 | * fragments on the socket so that all csums of sk_buffs | |
934 | * should be together | |
935 | */ | |
936 | offset = skb_transport_offset(skb); | |
937 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
938 | ||
939 | skb->ip_summed = CHECKSUM_NONE; | |
940 | ||
941 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
942 | csum = csum_add(csum, skb->csum); | |
943 | } | |
944 | ||
945 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
946 | csum); | |
947 | if (uh->check == 0) | |
948 | uh->check = CSUM_MANGLED_0; | |
949 | } | |
950 | } | |
951 | ||
1da177e4 LT |
952 | /* |
953 | * Sending | |
954 | */ | |
955 | ||
4c0a6cb0 | 956 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
957 | { |
958 | struct sk_buff *skb; | |
959 | struct udphdr *uh; | |
4c0a6cb0 | 960 | struct udp_sock *up = udp_sk(sk); |
1da177e4 | 961 | struct inet_sock *inet = inet_sk(sk); |
8822b64a | 962 | struct flowi6 *fl6; |
1da177e4 | 963 | int err = 0; |
b2bf1e26 | 964 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 965 | __wsum csum = 0; |
1da177e4 | 966 | |
8822b64a HFS |
967 | if (up->pending == AF_INET) |
968 | return udp_push_pending_frames(sk); | |
969 | ||
970 | fl6 = &inet->cork.fl.u.ip6; | |
971 | ||
1da177e4 LT |
972 | /* Grab the skbuff where UDP header space exists. */ |
973 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
974 | goto out; | |
975 | ||
976 | /* | |
977 | * Create a UDP header | |
978 | */ | |
4bedb452 | 979 | uh = udp_hdr(skb); |
1958b856 DM |
980 | uh->source = fl6->fl6_sport; |
981 | uh->dest = fl6->fl6_dport; | |
1da177e4 LT |
982 | uh->len = htons(up->len); |
983 | uh->check = 0; | |
984 | ||
b2bf1e26 | 985 | if (is_udplite) |
ba4e58ec | 986 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 | 987 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
4c9483b2 | 988 | udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, |
493c6be3 SS |
989 | up->len); |
990 | goto send; | |
991 | } else | |
ba4e58ec | 992 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 993 | |
ba4e58ec | 994 | /* add protocol-dependent pseudo-header */ |
4c9483b2 DM |
995 | uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
996 | up->len, fl6->flowi6_proto, csum); | |
1da177e4 | 997 | if (uh->check == 0) |
f6ab0288 | 998 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 999 | |
493c6be3 | 1000 | send: |
1da177e4 | 1001 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
1002 | if (err) { |
1003 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
1004 | UDP6_INC_STATS_USER(sock_net(sk), | |
1005 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
1006 | err = 0; | |
1007 | } | |
1008 | } else | |
1009 | UDP6_INC_STATS_USER(sock_net(sk), | |
1010 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
1011 | out: |
1012 | up->len = 0; | |
1013 | up->pending = 0; | |
1014 | return err; | |
1015 | } | |
1016 | ||
ba4e58ec | 1017 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
1018 | struct msghdr *msg, size_t len) |
1019 | { | |
1020 | struct ipv6_txoptions opt_space; | |
1021 | struct udp_sock *up = udp_sk(sk); | |
1022 | struct inet_sock *inet = inet_sk(sk); | |
1023 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1024 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 1025 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
1026 | struct ipv6_txoptions *opt = NULL; |
1027 | struct ip6_flowlabel *flowlabel = NULL; | |
4c9483b2 | 1028 | struct flowi6 fl6; |
1da177e4 LT |
1029 | struct dst_entry *dst; |
1030 | int addr_len = msg->msg_namelen; | |
1031 | int ulen = len; | |
1032 | int hlimit = -1; | |
41a1f8ea | 1033 | int tclass = -1; |
13b52cd4 | 1034 | int dontfrag = -1; |
1da177e4 LT |
1035 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
1036 | int err; | |
987905de | 1037 | int connected = 0; |
b2bf1e26 | 1038 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 1039 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
1040 | |
1041 | /* destination address check */ | |
1042 | if (sin6) { | |
1043 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
1044 | return -EINVAL; | |
1045 | ||
1046 | switch (sin6->sin6_family) { | |
1047 | case AF_INET6: | |
1048 | if (addr_len < SIN6_LEN_RFC2133) | |
1049 | return -EINVAL; | |
1050 | daddr = &sin6->sin6_addr; | |
1051 | break; | |
1052 | case AF_INET: | |
1053 | goto do_udp_sendmsg; | |
1054 | case AF_UNSPEC: | |
1055 | msg->msg_name = sin6 = NULL; | |
1056 | msg->msg_namelen = addr_len = 0; | |
1057 | daddr = NULL; | |
1058 | break; | |
1059 | default: | |
1060 | return -EINVAL; | |
1061 | } | |
1062 | } else if (!up->pending) { | |
1063 | if (sk->sk_state != TCP_ESTABLISHED) | |
1064 | return -EDESTADDRREQ; | |
1065 | daddr = &np->daddr; | |
1ab1457c | 1066 | } else |
1da177e4 LT |
1067 | daddr = NULL; |
1068 | ||
1069 | if (daddr) { | |
e773e4fa | 1070 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
1071 | struct sockaddr_in sin; |
1072 | sin.sin_family = AF_INET; | |
c720c7e8 | 1073 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
1074 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
1075 | msg->msg_name = &sin; | |
1076 | msg->msg_namelen = sizeof(sin); | |
1077 | do_udp_sendmsg: | |
1078 | if (__ipv6_only_sock(sk)) | |
1079 | return -ENETUNREACH; | |
1080 | return udp_sendmsg(iocb, sk, msg, len); | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | if (up->pending == AF_INET) | |
1085 | return udp_sendmsg(iocb, sk, msg, len); | |
1086 | ||
1087 | /* Rough check on arithmetic overflow, | |
b59e139b | 1088 | better check is made in ip6_append_data(). |
1da177e4 LT |
1089 | */ |
1090 | if (len > INT_MAX - sizeof(struct udphdr)) | |
1091 | return -EMSGSIZE; | |
1ab1457c | 1092 | |
1da177e4 LT |
1093 | if (up->pending) { |
1094 | /* | |
1095 | * There are pending frames. | |
1096 | * The socket lock must be held while it's corked. | |
1097 | */ | |
1098 | lock_sock(sk); | |
1099 | if (likely(up->pending)) { | |
1100 | if (unlikely(up->pending != AF_INET6)) { | |
1101 | release_sock(sk); | |
1102 | return -EAFNOSUPPORT; | |
1103 | } | |
1104 | dst = NULL; | |
1105 | goto do_append_data; | |
1106 | } | |
1107 | release_sock(sk); | |
1108 | } | |
1109 | ulen += sizeof(struct udphdr); | |
1110 | ||
4c9483b2 | 1111 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 LT |
1112 | |
1113 | if (sin6) { | |
1114 | if (sin6->sin6_port == 0) | |
1115 | return -EINVAL; | |
1116 | ||
1958b856 | 1117 | fl6.fl6_dport = sin6->sin6_port; |
1da177e4 LT |
1118 | daddr = &sin6->sin6_addr; |
1119 | ||
1120 | if (np->sndflow) { | |
4c9483b2 DM |
1121 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1122 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
1123 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1124 | if (flowlabel == NULL) |
1125 | return -EINVAL; | |
1126 | daddr = &flowlabel->dst; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * Otherwise it will be difficult to maintain | |
1132 | * sk->sk_dst_cache. | |
1133 | */ | |
1134 | if (sk->sk_state == TCP_ESTABLISHED && | |
1135 | ipv6_addr_equal(daddr, &np->daddr)) | |
1136 | daddr = &np->daddr; | |
1137 | ||
1138 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1139 | sin6->sin6_scope_id && | |
842df073 | 1140 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
4c9483b2 | 1141 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 LT |
1142 | } else { |
1143 | if (sk->sk_state != TCP_ESTABLISHED) | |
1144 | return -EDESTADDRREQ; | |
1145 | ||
1958b856 | 1146 | fl6.fl6_dport = inet->inet_dport; |
1da177e4 | 1147 | daddr = &np->daddr; |
4c9483b2 | 1148 | fl6.flowlabel = np->flow_label; |
987905de | 1149 | connected = 1; |
1da177e4 LT |
1150 | } |
1151 | ||
4c9483b2 DM |
1152 | if (!fl6.flowi6_oif) |
1153 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 | 1154 | |
4c9483b2 DM |
1155 | if (!fl6.flowi6_oif) |
1156 | fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; | |
9f690db7 | 1157 | |
4c9483b2 | 1158 | fl6.flowi6_mark = sk->sk_mark; |
51953d5b | 1159 | |
1da177e4 LT |
1160 | if (msg->msg_controllen) { |
1161 | opt = &opt_space; | |
1162 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1163 | opt->tot_len = sizeof(*opt); | |
1164 | ||
73df66f8 TP |
1165 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
1166 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
1167 | if (err < 0) { |
1168 | fl6_sock_release(flowlabel); | |
1169 | return err; | |
1170 | } | |
4c9483b2 DM |
1171 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1172 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1173 | if (flowlabel == NULL) |
1174 | return -EINVAL; | |
1175 | } | |
1176 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1177 | opt = NULL; | |
987905de | 1178 | connected = 0; |
1da177e4 LT |
1179 | } |
1180 | if (opt == NULL) | |
1181 | opt = np->opt; | |
df9890c3 YH |
1182 | if (flowlabel) |
1183 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1184 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1185 | |
4c9483b2 | 1186 | fl6.flowi6_proto = sk->sk_protocol; |
876c7f41 | 1187 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 1188 | fl6.daddr = *daddr; |
876c7f41 | 1189 | else |
4c9483b2 DM |
1190 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
1191 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 1192 | fl6.saddr = np->saddr; |
1958b856 | 1193 | fl6.fl6_sport = inet->inet_sport; |
1ab1457c | 1194 | |
4c9483b2 | 1195 | final_p = fl6_update_dst(&fl6, opt, &final); |
20c59de2 | 1196 | if (final_p) |
987905de | 1197 | connected = 0; |
1da177e4 | 1198 | |
4c9483b2 DM |
1199 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { |
1200 | fl6.flowi6_oif = np->mcast_oif; | |
987905de | 1201 | connected = 0; |
c4062dfc EH |
1202 | } else if (!fl6.flowi6_oif) |
1203 | fl6.flowi6_oif = np->ucast_oif; | |
1da177e4 | 1204 | |
4c9483b2 | 1205 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
beb8d13b | 1206 | |
4c9483b2 | 1207 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); |
68d0c6d3 DM |
1208 | if (IS_ERR(dst)) { |
1209 | err = PTR_ERR(dst); | |
1210 | dst = NULL; | |
1da177e4 | 1211 | goto out; |
14e50e57 | 1212 | } |
1da177e4 LT |
1213 | |
1214 | if (hlimit < 0) { | |
4c9483b2 | 1215 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
1da177e4 LT |
1216 | hlimit = np->mcast_hops; |
1217 | else | |
1218 | hlimit = np->hop_limit; | |
1219 | if (hlimit < 0) | |
6b75d090 | 1220 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1221 | } |
1222 | ||
e651f03a | 1223 | if (tclass < 0) |
41a1f8ea | 1224 | tclass = np->tclass; |
41a1f8ea | 1225 | |
13b52cd4 BH |
1226 | if (dontfrag < 0) |
1227 | dontfrag = np->dontfrag; | |
1228 | ||
1da177e4 LT |
1229 | if (msg->msg_flags&MSG_CONFIRM) |
1230 | goto do_confirm; | |
1231 | back_from_confirm: | |
1232 | ||
1233 | lock_sock(sk); | |
1234 | if (unlikely(up->pending)) { | |
1235 | /* The socket is already corked while preparing it. */ | |
1236 | /* ... which is an evident application bug. --ANK */ | |
1237 | release_sock(sk); | |
1238 | ||
64ce2073 | 1239 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1240 | err = -EINVAL; |
1241 | goto out; | |
1242 | } | |
1243 | ||
1244 | up->pending = AF_INET6; | |
1245 | ||
1246 | do_append_data: | |
1247 | up->len += ulen; | |
ba4e58ec GR |
1248 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1249 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
4c9483b2 | 1250 | sizeof(struct udphdr), hlimit, tclass, opt, &fl6, |
41a1f8ea | 1251 | (struct rt6_info*)dst, |
13b52cd4 | 1252 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1253 | if (err) |
1254 | udp_v6_flush_pending_frames(sk); | |
1255 | else if (!corkreq) | |
4c0a6cb0 | 1256 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1257 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1258 | up->pending = 0; | |
1da177e4 | 1259 | |
a5e7c210 DM |
1260 | if (dst) { |
1261 | if (connected) { | |
1262 | ip6_dst_store(sk, dst, | |
4c9483b2 | 1263 | ipv6_addr_equal(&fl6.daddr, &np->daddr) ? |
8e1ef0a9 YH |
1264 | &np->daddr : NULL, |
1265 | #ifdef CONFIG_IPV6_SUBTREES | |
4c9483b2 | 1266 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
8e1ef0a9 YH |
1267 | &np->saddr : |
1268 | #endif | |
1269 | NULL); | |
a5e7c210 DM |
1270 | } else { |
1271 | dst_release(dst); | |
1272 | } | |
a3c96089 | 1273 | dst = NULL; |
a5e7c210 DM |
1274 | } |
1275 | ||
1da177e4 LT |
1276 | if (err > 0) |
1277 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1278 | release_sock(sk); | |
1279 | out: | |
a3c96089 | 1280 | dst_release(dst); |
1da177e4 | 1281 | fl6_sock_release(flowlabel); |
cd562c98 | 1282 | if (!err) |
1da177e4 | 1283 | return len; |
a18135eb DM |
1284 | /* |
1285 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1286 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1287 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1288 | * things). We could add another new stat but at least for now that | |
1289 | * seems like overkill. | |
1290 | */ | |
1291 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1292 | UDP6_INC_STATS_USER(sock_net(sk), |
1293 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1294 | } |
1da177e4 LT |
1295 | return err; |
1296 | ||
1297 | do_confirm: | |
1298 | dst_confirm(dst); | |
1299 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1300 | goto back_from_confirm; | |
1301 | err = 0; | |
1302 | goto out; | |
1303 | } | |
1304 | ||
7d06b2e0 | 1305 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 | 1306 | { |
44046a59 | 1307 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
1308 | lock_sock(sk); |
1309 | udp_v6_flush_pending_frames(sk); | |
1310 | release_sock(sk); | |
1311 | ||
44046a59 TP |
1312 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
1313 | void (*encap_destroy)(struct sock *sk); | |
1314 | encap_destroy = ACCESS_ONCE(up->encap_destroy); | |
1315 | if (encap_destroy) | |
1316 | encap_destroy(sk); | |
1317 | } | |
1318 | ||
1da177e4 | 1319 | inet6_destroy_sock(sk); |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | /* | |
1323 | * Socket option code for UDP | |
1324 | */ | |
ba4e58ec | 1325 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1326 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1327 | { |
db8dac20 | 1328 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1329 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1330 | udp_v6_push_pending_frames); | |
ba4e58ec | 1331 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1332 | } |
1333 | ||
1334 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1335 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1336 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1337 | { |
db8dac20 | 1338 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1339 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1340 | udp_v6_push_pending_frames); | |
ba4e58ec | 1341 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1342 | } |
1343 | #endif | |
1344 | ||
ba4e58ec GR |
1345 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1346 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1347 | { |
db8dac20 | 1348 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1349 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1350 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1351 | } |
1352 | ||
1353 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1354 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1355 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1356 | { |
db8dac20 | 1357 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1358 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1359 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1360 | } |
1361 | #endif | |
1362 | ||
41135cc8 | 1363 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1364 | .handler = udpv6_rcv, |
1365 | .err_handler = udpv6_err, | |
1366 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1367 | }; | |
1368 | ||
1369 | /* ------------------------------------------------------------------------ */ | |
1370 | #ifdef CONFIG_PROC_FS | |
ba4e58ec | 1371 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 | 1372 | { |
17ef66af LC |
1373 | if (v == SEQ_START_TOKEN) { |
1374 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); | |
1375 | } else { | |
1376 | int bucket = ((struct udp_iter_state *)seq->private)->bucket; | |
1377 | struct inet_sock *inet = inet_sk(v); | |
1378 | __u16 srcp = ntohs(inet->inet_sport); | |
1379 | __u16 destp = ntohs(inet->inet_dport); | |
1380 | ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); | |
1381 | } | |
1da177e4 LT |
1382 | return 0; |
1383 | } | |
1384 | ||
73cb88ec AV |
1385 | static const struct file_operations udp6_afinfo_seq_fops = { |
1386 | .owner = THIS_MODULE, | |
1387 | .open = udp_seq_open, | |
1388 | .read = seq_read, | |
1389 | .llseek = seq_lseek, | |
1390 | .release = seq_release_net | |
1391 | }; | |
1392 | ||
1da177e4 | 1393 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1394 | .name = "udp6", |
1395 | .family = AF_INET6, | |
645ca708 | 1396 | .udp_table = &udp_table, |
73cb88ec | 1397 | .seq_fops = &udp6_afinfo_seq_fops, |
dda61925 DL |
1398 | .seq_ops = { |
1399 | .show = udp6_seq_show, | |
1400 | }, | |
1da177e4 LT |
1401 | }; |
1402 | ||
2c8c1e72 | 1403 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1404 | { |
0c96d8c5 | 1405 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1406 | } |
1407 | ||
0c96d8c5 DL |
1408 | void udp6_proc_exit(struct net *net) { |
1409 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1410 | } |
1411 | #endif /* CONFIG_PROC_FS */ | |
1412 | ||
f77d6021 ED |
1413 | void udp_v6_clear_sk(struct sock *sk, int size) |
1414 | { | |
1415 | struct inet_sock *inet = inet_sk(sk); | |
1416 | ||
1417 | /* we do not want to clear pinet6 field, because of RCU lookups */ | |
1418 | sk_prot_clear_portaddr_nulls(sk, offsetof(struct inet_sock, pinet6)); | |
1419 | ||
1420 | size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6); | |
1421 | memset(&inet->pinet6 + 1, 0, size); | |
1422 | } | |
1423 | ||
1da177e4 LT |
1424 | /* ------------------------------------------------------------------------ */ |
1425 | ||
1426 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1427 | .name = "UDPv6", |
1428 | .owner = THIS_MODULE, | |
ba4e58ec | 1429 | .close = udp_lib_close, |
543d9cfe ACM |
1430 | .connect = ip6_datagram_connect, |
1431 | .disconnect = udp_disconnect, | |
1432 | .ioctl = udp_ioctl, | |
1433 | .destroy = udpv6_destroy_sock, | |
1434 | .setsockopt = udpv6_setsockopt, | |
1435 | .getsockopt = udpv6_getsockopt, | |
1436 | .sendmsg = udpv6_sendmsg, | |
1437 | .recvmsg = udpv6_recvmsg, | |
f7ad74fe | 1438 | .backlog_rcv = __udpv6_queue_rcv_skb, |
ba4e58ec GR |
1439 | .hash = udp_lib_hash, |
1440 | .unhash = udp_lib_unhash, | |
719f8358 | 1441 | .rehash = udp_v6_rehash, |
543d9cfe | 1442 | .get_port = udp_v6_get_port, |
95766fff HA |
1443 | .memory_allocated = &udp_memory_allocated, |
1444 | .sysctl_mem = sysctl_udp_mem, | |
1445 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1446 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1447 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1448 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1449 | .h.udp_table = &udp_table, |
3fdadf7d | 1450 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1451 | .compat_setsockopt = compat_udpv6_setsockopt, |
1452 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1453 | #endif |
f77d6021 | 1454 | .clear_sk = udp_v6_clear_sk, |
1da177e4 LT |
1455 | }; |
1456 | ||
1da177e4 LT |
1457 | static struct inet_protosw udpv6_protosw = { |
1458 | .type = SOCK_DGRAM, | |
1459 | .protocol = IPPROTO_UDP, | |
1460 | .prot = &udpv6_prot, | |
1461 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1462 | .no_check = UDP_CSUM_DEFAULT, |
1463 | .flags = INET_PROTOSW_PERMANENT, | |
1464 | }; | |
1465 | ||
1466 | ||
7f4e4868 | 1467 | int __init udpv6_init(void) |
1da177e4 | 1468 | { |
7f4e4868 DL |
1469 | int ret; |
1470 | ||
3336288a VY |
1471 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); |
1472 | if (ret) | |
c6b641a4 | 1473 | goto out; |
3336288a | 1474 | |
7f4e4868 DL |
1475 | ret = inet6_register_protosw(&udpv6_protosw); |
1476 | if (ret) | |
1477 | goto out_udpv6_protocol; | |
1478 | out: | |
1479 | return ret; | |
1480 | ||
1481 | out_udpv6_protocol: | |
1482 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1483 | goto out; | |
1484 | } | |
1485 | ||
09f7709f | 1486 | void udpv6_exit(void) |
7f4e4868 DL |
1487 | { |
1488 | inet6_unregister_protosw(&udpv6_protosw); | |
1489 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1490 | } |