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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * UDP over IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 LT |
7 | * |
8 | * Based on linux/ipv4/udp.c | |
9 | * | |
1da177e4 LT |
10 | * Fixes: |
11 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
12 | * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which | |
13 | * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind | |
14 | * a single port at the same time. | |
15 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data | |
16 | * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | */ | |
23 | ||
1da177e4 LT |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> | |
26 | #include <linux/socket.h> | |
27 | #include <linux/sockios.h> | |
1da177e4 LT |
28 | #include <linux/net.h> |
29 | #include <linux/in6.h> | |
30 | #include <linux/netdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/ipv6.h> | |
33 | #include <linux/icmpv6.h> | |
34 | #include <linux/init.h> | |
1781f7f5 | 35 | #include <linux/module.h> |
3305b80c | 36 | #include <linux/skbuff.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
1da177e4 LT |
38 | #include <asm/uaccess.h> |
39 | ||
1da177e4 LT |
40 | #include <net/ndisc.h> |
41 | #include <net/protocol.h> | |
42 | #include <net/transp_v6.h> | |
43 | #include <net/ip6_route.h> | |
1da177e4 | 44 | #include <net/raw.h> |
c752f073 | 45 | #include <net/tcp_states.h> |
1da177e4 LT |
46 | #include <net/ip6_checksum.h> |
47 | #include <net/xfrm.h> | |
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 | |
b50026b5 HFS |
56 | static unsigned int udp6_ehashfn(struct net *net, |
57 | const struct in6_addr *laddr, | |
58 | const u16 lport, | |
59 | const struct in6_addr *faddr, | |
60 | const __be16 fport) | |
61 | { | |
1bbdceef HFS |
62 | static u32 udp6_ehash_secret __read_mostly; |
63 | static u32 udp_ipv6_hash_secret __read_mostly; | |
64 | ||
65 | u32 lhash, fhash; | |
66 | ||
67 | net_get_random_once(&udp6_ehash_secret, | |
68 | sizeof(udp6_ehash_secret)); | |
69 | net_get_random_once(&udp_ipv6_hash_secret, | |
70 | sizeof(udp_ipv6_hash_secret)); | |
71 | ||
72 | lhash = (__force u32)laddr->s6_addr32[3]; | |
73 | fhash = __ipv6_addr_jhash(faddr, udp_ipv6_hash_secret); | |
74 | ||
b50026b5 | 75 | return __inet6_ehashfn(lhash, lport, fhash, fport, |
1bbdceef | 76 | udp_ipv6_hash_secret + net_hash_mix(net)); |
b50026b5 HFS |
77 | } |
78 | ||
b2f5e7cd VY |
79 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
80 | { | |
b2f5e7cd VY |
81 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); |
82 | int sk_ipv6only = ipv6_only_sock(sk); | |
83 | int sk2_ipv6only = inet_v6_ipv6only(sk2); | |
efe4208f | 84 | int addr_type = ipv6_addr_type(&sk->sk_v6_rcv_saddr); |
b2f5e7cd VY |
85 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; |
86 | ||
87 | /* if both are mapped, treat as IPv4 */ | |
88 | if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) | |
499923c7 | 89 | return (!sk2_ipv6only && |
50805466 ED |
90 | (!sk->sk_rcv_saddr || !sk2->sk_rcv_saddr || |
91 | sk->sk_rcv_saddr == sk2->sk_rcv_saddr)); | |
b2f5e7cd VY |
92 | |
93 | if (addr_type2 == IPV6_ADDR_ANY && | |
94 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
95 | return 1; | |
96 | ||
97 | if (addr_type == IPV6_ADDR_ANY && | |
98 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
99 | return 1; | |
100 | ||
101 | if (sk2_rcv_saddr6 && | |
efe4208f | 102 | ipv6_addr_equal(&sk->sk_v6_rcv_saddr, sk2_rcv_saddr6)) |
b2f5e7cd VY |
103 | return 1; |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
d4cada4a ED |
108 | static unsigned int udp6_portaddr_hash(struct net *net, |
109 | const struct in6_addr *addr6, | |
110 | unsigned int port) | |
111 | { | |
112 | unsigned int hash, mix = net_hash_mix(net); | |
113 | ||
114 | if (ipv6_addr_any(addr6)) | |
115 | hash = jhash_1word(0, mix); | |
856540ee | 116 | else if (ipv6_addr_v4mapped(addr6)) |
0eae88f3 | 117 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
d4cada4a | 118 | else |
0eae88f3 | 119 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
d4cada4a ED |
120 | |
121 | return hash ^ port; | |
122 | } | |
123 | ||
124 | ||
6ba5a3c5 | 125 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 126 | { |
30fff923 ED |
127 | unsigned int hash2_nulladdr = |
128 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); | |
9a52e97e | 129 | unsigned int hash2_partial = |
efe4208f | 130 | udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0); |
30fff923 | 131 | |
d4cada4a | 132 | /* precompute partial secondary hash */ |
30fff923 ED |
133 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
134 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); | |
1da177e4 LT |
135 | } |
136 | ||
719f8358 ED |
137 | static void udp_v6_rehash(struct sock *sk) |
138 | { | |
139 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), | |
efe4208f | 140 | &sk->sk_v6_rcv_saddr, |
719f8358 ED |
141 | inet_sk(sk)->inet_num); |
142 | ||
143 | udp_lib_rehash(sk, new_hash); | |
144 | } | |
145 | ||
645ca708 ED |
146 | static inline int compute_score(struct sock *sk, struct net *net, |
147 | unsigned short hnum, | |
88440ae7 BS |
148 | const struct in6_addr *saddr, __be16 sport, |
149 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 ED |
150 | int dif) |
151 | { | |
152 | int score = -1; | |
153 | ||
d4cada4a | 154 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
645ca708 | 155 | sk->sk_family == PF_INET6) { |
645ca708 ED |
156 | struct inet_sock *inet = inet_sk(sk); |
157 | ||
158 | score = 0; | |
c720c7e8 ED |
159 | if (inet->inet_dport) { |
160 | if (inet->inet_dport != sport) | |
645ca708 ED |
161 | return -1; |
162 | score++; | |
163 | } | |
efe4208f ED |
164 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
165 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) | |
645ca708 ED |
166 | return -1; |
167 | score++; | |
168 | } | |
efe4208f ED |
169 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
170 | if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) | |
645ca708 ED |
171 | return -1; |
172 | score++; | |
173 | } | |
174 | if (sk->sk_bound_dev_if) { | |
175 | if (sk->sk_bound_dev_if != dif) | |
176 | return -1; | |
177 | score++; | |
178 | } | |
179 | } | |
180 | return score; | |
181 | } | |
182 | ||
fddc17de ED |
183 | #define SCORE2_MAX (1 + 1 + 1) |
184 | static inline int compute_score2(struct sock *sk, struct net *net, | |
185 | const struct in6_addr *saddr, __be16 sport, | |
186 | const struct in6_addr *daddr, unsigned short hnum, | |
187 | int dif) | |
188 | { | |
189 | int score = -1; | |
190 | ||
191 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && | |
192 | sk->sk_family == PF_INET6) { | |
fddc17de ED |
193 | struct inet_sock *inet = inet_sk(sk); |
194 | ||
efe4208f | 195 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) |
fddc17de ED |
196 | return -1; |
197 | score = 0; | |
198 | if (inet->inet_dport) { | |
199 | if (inet->inet_dport != sport) | |
200 | return -1; | |
201 | score++; | |
202 | } | |
efe4208f ED |
203 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
204 | if (!ipv6_addr_equal(&sk->sk_v6_daddr, saddr)) | |
fddc17de ED |
205 | return -1; |
206 | score++; | |
207 | } | |
208 | if (sk->sk_bound_dev_if) { | |
209 | if (sk->sk_bound_dev_if != dif) | |
210 | return -1; | |
211 | score++; | |
212 | } | |
213 | } | |
214 | return score; | |
215 | } | |
216 | ||
fddc17de ED |
217 | |
218 | /* called with read_rcu_lock() */ | |
219 | static struct sock *udp6_lib_lookup2(struct net *net, | |
220 | const struct in6_addr *saddr, __be16 sport, | |
221 | const struct in6_addr *daddr, unsigned int hnum, int dif, | |
222 | struct udp_hslot *hslot2, unsigned int slot2) | |
223 | { | |
224 | struct sock *sk, *result; | |
225 | struct hlist_nulls_node *node; | |
72289b96 TH |
226 | int score, badness, matches = 0, reuseport = 0; |
227 | u32 hash = 0; | |
fddc17de ED |
228 | |
229 | begin: | |
230 | result = NULL; | |
231 | badness = -1; | |
232 | udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { | |
233 | score = compute_score2(sk, net, saddr, sport, | |
234 | daddr, hnum, dif); | |
235 | if (score > badness) { | |
236 | result = sk; | |
237 | badness = score; | |
72289b96 TH |
238 | reuseport = sk->sk_reuseport; |
239 | if (reuseport) { | |
b50026b5 HFS |
240 | hash = udp6_ehashfn(net, daddr, hnum, |
241 | saddr, sport); | |
72289b96 TH |
242 | matches = 1; |
243 | } else if (score == SCORE2_MAX) | |
fddc17de | 244 | goto exact_match; |
72289b96 TH |
245 | } else if (score == badness && reuseport) { |
246 | matches++; | |
247 | if (((u64)hash * matches) >> 32 == 0) | |
248 | result = sk; | |
249 | hash = next_pseudo_random32(hash); | |
fddc17de ED |
250 | } |
251 | } | |
252 | /* | |
253 | * if the nulls value we got at the end of this lookup is | |
254 | * not the expected one, we must restart lookup. | |
255 | * We probably met an item that was moved to another chain. | |
256 | */ | |
257 | if (get_nulls_value(node) != slot2) | |
258 | goto begin; | |
259 | ||
260 | if (result) { | |
261 | exact_match: | |
c31504dc | 262 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
fddc17de ED |
263 | result = NULL; |
264 | else if (unlikely(compute_score2(result, net, saddr, sport, | |
265 | daddr, hnum, dif) < badness)) { | |
266 | sock_put(result); | |
267 | goto begin; | |
268 | } | |
269 | } | |
270 | return result; | |
271 | } | |
272 | ||
fce82338 | 273 | struct sock *__udp6_lib_lookup(struct net *net, |
88440ae7 BS |
274 | const struct in6_addr *saddr, __be16 sport, |
275 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 | 276 | int dif, struct udp_table *udptable) |
1da177e4 | 277 | { |
271b72c7 | 278 | struct sock *sk, *result; |
88ab1932 | 279 | struct hlist_nulls_node *node; |
1da177e4 | 280 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
281 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
282 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
72289b96 TH |
283 | int score, badness, matches = 0, reuseport = 0; |
284 | u32 hash = 0; | |
645ca708 | 285 | |
271b72c7 | 286 | rcu_read_lock(); |
fddc17de ED |
287 | if (hslot->count > 10) { |
288 | hash2 = udp6_portaddr_hash(net, daddr, hnum); | |
289 | slot2 = hash2 & udptable->mask; | |
290 | hslot2 = &udptable->hash2[slot2]; | |
291 | if (hslot->count < hslot2->count) | |
292 | goto begin; | |
293 | ||
294 | result = udp6_lib_lookup2(net, saddr, sport, | |
295 | daddr, hnum, dif, | |
296 | hslot2, slot2); | |
297 | if (!result) { | |
298 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); | |
299 | slot2 = hash2 & udptable->mask; | |
300 | hslot2 = &udptable->hash2[slot2]; | |
301 | if (hslot->count < hslot2->count) | |
302 | goto begin; | |
303 | ||
1223c67c JBD |
304 | result = udp6_lib_lookup2(net, saddr, sport, |
305 | &in6addr_any, hnum, dif, | |
fddc17de ED |
306 | hslot2, slot2); |
307 | } | |
308 | rcu_read_unlock(); | |
309 | return result; | |
310 | } | |
271b72c7 ED |
311 | begin: |
312 | result = NULL; | |
313 | badness = -1; | |
88ab1932 | 314 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
315 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
316 | if (score > badness) { | |
317 | result = sk; | |
318 | badness = score; | |
72289b96 TH |
319 | reuseport = sk->sk_reuseport; |
320 | if (reuseport) { | |
b50026b5 HFS |
321 | hash = udp6_ehashfn(net, daddr, hnum, |
322 | saddr, sport); | |
72289b96 TH |
323 | matches = 1; |
324 | } | |
325 | } else if (score == badness && reuseport) { | |
326 | matches++; | |
327 | if (((u64)hash * matches) >> 32 == 0) | |
328 | result = sk; | |
329 | hash = next_pseudo_random32(hash); | |
1da177e4 LT |
330 | } |
331 | } | |
88ab1932 ED |
332 | /* |
333 | * if the nulls value we got at the end of this lookup is | |
334 | * not the expected one, we must restart lookup. | |
335 | * We probably met an item that was moved to another chain. | |
336 | */ | |
fddc17de | 337 | if (get_nulls_value(node) != slot) |
88ab1932 ED |
338 | goto begin; |
339 | ||
271b72c7 | 340 | if (result) { |
c31504dc | 341 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
271b72c7 ED |
342 | result = NULL; |
343 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
344 | daddr, dport, dif) < badness)) { | |
345 | sock_put(result); | |
346 | goto begin; | |
347 | } | |
348 | } | |
349 | rcu_read_unlock(); | |
1da177e4 LT |
350 | return result; |
351 | } | |
fce82338 | 352 | EXPORT_SYMBOL_GPL(__udp6_lib_lookup); |
1da177e4 | 353 | |
607c4aaf KK |
354 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
355 | __be16 sport, __be16 dport, | |
645ca708 | 356 | struct udp_table *udptable) |
607c4aaf | 357 | { |
23542618 | 358 | struct sock *sk; |
b71d1d42 | 359 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
607c4aaf | 360 | |
23542618 KK |
361 | if (unlikely(sk = skb_steal_sock(skb))) |
362 | return sk; | |
adf30907 ED |
363 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
364 | &iph->daddr, dport, inet6_iif(skb), | |
365 | udptable); | |
607c4aaf KK |
366 | } |
367 | ||
aa976fc0 BS |
368 | struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, |
369 | const struct in6_addr *daddr, __be16 dport, int dif) | |
370 | { | |
371 | return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); | |
372 | } | |
373 | EXPORT_SYMBOL_GPL(udp6_lib_lookup); | |
374 | ||
375 | ||
1da177e4 LT |
376 | /* |
377 | * This should be easy, if there is something there we | |
378 | * return it, otherwise we block. | |
379 | */ | |
380 | ||
ba4e58ec | 381 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
382 | struct msghdr *msg, size_t len, |
383 | int noblock, int flags, int *addr_len) | |
384 | { | |
385 | struct ipv6_pinfo *np = inet6_sk(sk); | |
386 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 387 | struct sk_buff *skb; |
59c2cdae | 388 | unsigned int ulen, copied; |
3f518bf7 | 389 | int peeked, off = 0; |
759e5d00 HX |
390 | int err; |
391 | int is_udplite = IS_UDPLITE(sk); | |
f26ba175 | 392 | int is_udp4; |
8a74ad60 | 393 | bool slow; |
1da177e4 | 394 | |
1da177e4 | 395 | if (flags & MSG_ERRQUEUE) |
85fbaa75 | 396 | return ipv6_recv_error(sk, msg, len, addr_len); |
1da177e4 | 397 | |
4b340ae2 | 398 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
85fbaa75 | 399 | return ipv6_recv_rxpmtu(sk, msg, len, addr_len); |
4b340ae2 | 400 | |
1da177e4 | 401 | try_again: |
a59322be | 402 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
3f518bf7 | 403 | &peeked, &off, &err); |
1da177e4 LT |
404 | if (!skb) |
405 | goto out; | |
406 | ||
759e5d00 | 407 | ulen = skb->len - sizeof(struct udphdr); |
59c2cdae DM |
408 | copied = len; |
409 | if (copied > ulen) | |
410 | copied = ulen; | |
411 | else if (copied < ulen) | |
1ab1457c | 412 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 413 | |
f26ba175 WY |
414 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
415 | ||
ba4e58ec | 416 | /* |
759e5d00 HX |
417 | * If checksum is needed at all, try to do it while copying the |
418 | * data. If the data is truncated, or if we only want a partial | |
419 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 420 | */ |
ba4e58ec | 421 | |
59c2cdae | 422 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
759e5d00 | 423 | if (udp_lib_checksum_complete(skb)) |
1da177e4 | 424 | goto csum_copy_err; |
ba4e58ec GR |
425 | } |
426 | ||
60476372 | 427 | if (skb_csum_unnecessary(skb)) |
ba4e58ec | 428 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
22911fc5 | 429 | msg->msg_iov, copied); |
ba4e58ec | 430 | else { |
1da177e4 LT |
431 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
432 | if (err == -EINVAL) | |
433 | goto csum_copy_err; | |
434 | } | |
22911fc5 ED |
435 | if (unlikely(err)) { |
436 | trace_kfree_skb(skb, udpv6_recvmsg); | |
979402b1 ED |
437 | if (!peeked) { |
438 | atomic_inc(&sk->sk_drops); | |
439 | if (is_udp4) | |
440 | UDP_INC_STATS_USER(sock_net(sk), | |
441 | UDP_MIB_INERRORS, | |
442 | is_udplite); | |
443 | else | |
444 | UDP6_INC_STATS_USER(sock_net(sk), | |
445 | UDP_MIB_INERRORS, | |
446 | is_udplite); | |
447 | } | |
1da177e4 | 448 | goto out_free; |
22911fc5 | 449 | } |
f26ba175 WY |
450 | if (!peeked) { |
451 | if (is_udp4) | |
452 | UDP_INC_STATS_USER(sock_net(sk), | |
453 | UDP_MIB_INDATAGRAMS, is_udplite); | |
454 | else | |
455 | UDP6_INC_STATS_USER(sock_net(sk), | |
456 | UDP_MIB_INDATAGRAMS, is_udplite); | |
457 | } | |
cb75994e | 458 | |
3b885787 | 459 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
460 | |
461 | /* Copy the address. */ | |
462 | if (msg->msg_name) { | |
463 | struct sockaddr_in6 *sin6; | |
1ab1457c | 464 | |
1da177e4 LT |
465 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
466 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 467 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 | 468 | sin6->sin6_flowinfo = 0; |
1da177e4 | 469 | |
842df073 | 470 | if (is_udp4) { |
b301e82c BH |
471 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
472 | &sin6->sin6_addr); | |
842df073 HFS |
473 | sin6->sin6_scope_id = 0; |
474 | } else { | |
4e3fd7a0 | 475 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
842df073 HFS |
476 | sin6->sin6_scope_id = |
477 | ipv6_iface_scope_id(&sin6->sin6_addr, | |
478 | IP6CB(skb)->iif); | |
1da177e4 | 479 | } |
bceaa902 | 480 | *addr_len = sizeof(*sin6); |
1da177e4 | 481 | } |
f26ba175 | 482 | if (is_udp4) { |
1da177e4 LT |
483 | if (inet->cmsg_flags) |
484 | ip_cmsg_recv(msg, skb); | |
485 | } else { | |
486 | if (np->rxopt.all) | |
73df66f8 | 487 | ip6_datagram_recv_ctl(sk, msg, skb); |
1ab1457c | 488 | } |
1da177e4 | 489 | |
59c2cdae | 490 | err = copied; |
1da177e4 | 491 | if (flags & MSG_TRUNC) |
759e5d00 | 492 | err = ulen; |
1da177e4 LT |
493 | |
494 | out_free: | |
9d410c79 | 495 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
496 | out: |
497 | return err; | |
498 | ||
499 | csum_copy_err: | |
8a74ad60 | 500 | slow = lock_sock_fast(sk); |
0856f939 | 501 | if (!skb_kill_datagram(sk, skb, flags)) { |
6a5dc9e5 ED |
502 | if (is_udp4) { |
503 | UDP_INC_STATS_USER(sock_net(sk), | |
504 | UDP_MIB_CSUMERRORS, is_udplite); | |
0856f939 WY |
505 | UDP_INC_STATS_USER(sock_net(sk), |
506 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 ED |
507 | } else { |
508 | UDP6_INC_STATS_USER(sock_net(sk), | |
509 | UDP_MIB_CSUMERRORS, is_udplite); | |
0856f939 WY |
510 | UDP6_INC_STATS_USER(sock_net(sk), |
511 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 | 512 | } |
0856f939 | 513 | } |
8a74ad60 | 514 | unlock_sock_fast(sk, slow); |
1da177e4 | 515 | |
32c90254 | 516 | if (noblock) |
1da177e4 | 517 | return -EAGAIN; |
9cfaa8de XZ |
518 | |
519 | /* starting over for a new packet */ | |
520 | msg->msg_flags &= ~MSG_TRUNC; | |
1da177e4 LT |
521 | goto try_again; |
522 | } | |
523 | ||
ba4e58ec | 524 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 525 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 526 | struct udp_table *udptable) |
1da177e4 LT |
527 | { |
528 | struct ipv6_pinfo *np; | |
b71d1d42 ED |
529 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
530 | const struct in6_addr *saddr = &hdr->saddr; | |
531 | const struct in6_addr *daddr = &hdr->daddr; | |
1da177e4 LT |
532 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); |
533 | struct sock *sk; | |
534 | int err; | |
535 | ||
c346dca1 | 536 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 537 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
538 | if (sk == NULL) |
539 | return; | |
540 | ||
81aded24 DM |
541 | if (type == ICMPV6_PKT_TOOBIG) |
542 | ip6_sk_update_pmtu(skb, sk, info); | |
1a462d18 | 543 | if (type == NDISC_REDIRECT) { |
ec18d9a2 | 544 | ip6_sk_redirect(skb, sk); |
1a462d18 DJ |
545 | goto out; |
546 | } | |
81aded24 | 547 | |
1da177e4 LT |
548 | np = inet6_sk(sk); |
549 | ||
550 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
551 | goto out; | |
552 | ||
553 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
554 | goto out; | |
555 | ||
b1faf566 | 556 | if (np->recverr) |
1da177e4 | 557 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
b1faf566 | 558 | |
1da177e4 LT |
559 | sk->sk_err = err; |
560 | sk->sk_error_report(sk); | |
561 | out: | |
562 | sock_put(sk); | |
563 | } | |
564 | ||
f7ad74fe BL |
565 | static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
566 | { | |
567 | int rc; | |
568 | ||
efe4208f | 569 | if (!ipv6_addr_any(&sk->sk_v6_daddr)) { |
f7ad74fe | 570 | sock_rps_save_rxhash(sk, skb); |
005ec974 SB |
571 | sk_mark_napi_id(sk, skb); |
572 | } | |
f7ad74fe BL |
573 | |
574 | rc = sock_queue_rcv_skb(sk, skb); | |
575 | if (rc < 0) { | |
576 | int is_udplite = IS_UDPLITE(sk); | |
577 | ||
578 | /* Note that an ENOMEM error is charged twice */ | |
579 | if (rc == -ENOMEM) | |
580 | UDP6_INC_STATS_BH(sock_net(sk), | |
581 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
582 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); | |
583 | kfree_skb(skb); | |
584 | return -1; | |
585 | } | |
586 | return 0; | |
587 | } | |
588 | ||
ba4e58ec | 589 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
590 | struct inet6_skb_parm *opt, u8 type, |
591 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 592 | { |
645ca708 | 593 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
594 | } |
595 | ||
d7f3f621 BL |
596 | static struct static_key udpv6_encap_needed __read_mostly; |
597 | void udpv6_encap_enable(void) | |
598 | { | |
599 | if (!static_key_enabled(&udpv6_encap_needed)) | |
600 | static_key_slow_inc(&udpv6_encap_needed); | |
601 | } | |
602 | EXPORT_SYMBOL(udpv6_encap_enable); | |
603 | ||
f7ad74fe | 604 | int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 605 | { |
ba4e58ec | 606 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 607 | int rc; |
b2bf1e26 | 608 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 609 | |
ba4e58ec GR |
610 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
611 | goto drop; | |
1da177e4 | 612 | |
d7f3f621 BL |
613 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
614 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
615 | ||
616 | /* | |
617 | * This is an encapsulation socket so pass the skb to | |
618 | * the socket's udp_encap_rcv() hook. Otherwise, just | |
619 | * fall through and pass this up the UDP socket. | |
620 | * up->encap_rcv() returns the following value: | |
621 | * =0 if skb was successfully passed to the encap | |
622 | * handler or was discarded by it. | |
623 | * >0 if skb should be passed on to UDP. | |
624 | * <0 if skb should be resubmitted as proto -N | |
625 | */ | |
626 | ||
627 | /* if we're overly short, let UDP handle it */ | |
628 | encap_rcv = ACCESS_ONCE(up->encap_rcv); | |
629 | if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) { | |
630 | int ret; | |
631 | ||
632 | ret = encap_rcv(sk, skb); | |
633 | if (ret <= 0) { | |
634 | UDP_INC_STATS_BH(sock_net(sk), | |
635 | UDP_MIB_INDATAGRAMS, | |
636 | is_udplite); | |
637 | return -ret; | |
638 | } | |
639 | } | |
640 | ||
641 | /* FALLTHROUGH -- it's a UDP Packet */ | |
642 | } | |
643 | ||
ba4e58ec GR |
644 | /* |
645 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
646 | */ | |
b2bf1e26 | 647 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
648 | |
649 | if (up->pcrlen == 0) { /* full coverage was set */ | |
650 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
651 | " %d while full coverage %d requested\n", | |
652 | UDP_SKB_CB(skb)->cscov, skb->len); | |
653 | goto drop; | |
654 | } | |
655 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
656 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
657 | "too small, need min %d\n", | |
658 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
659 | goto drop; | |
660 | } | |
1da177e4 LT |
661 | } |
662 | ||
33d480ce | 663 | if (rcu_access_pointer(sk->sk_filter)) { |
1ab6eb62 | 664 | if (udp_lib_checksum_complete(skb)) |
6a5dc9e5 | 665 | goto csum_error; |
1ab6eb62 | 666 | } |
ba4e58ec | 667 | |
cb80ef46 BL |
668 | if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) |
669 | goto drop; | |
670 | ||
d826eb14 | 671 | skb_dst_drop(skb); |
cb75994e | 672 | |
cb80ef46 BL |
673 | bh_lock_sock(sk); |
674 | rc = 0; | |
675 | if (!sock_owned_by_user(sk)) | |
676 | rc = __udpv6_queue_rcv_skb(sk, skb); | |
677 | else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { | |
678 | bh_unlock_sock(sk); | |
679 | goto drop; | |
680 | } | |
681 | bh_unlock_sock(sk); | |
f7ad74fe BL |
682 | |
683 | return rc; | |
6a5dc9e5 ED |
684 | csum_error: |
685 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); | |
ba4e58ec | 686 | drop: |
ef28d1a2 | 687 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
cb80ef46 | 688 | atomic_inc(&sk->sk_drops); |
ba4e58ec GR |
689 | kfree_skb(skb); |
690 | return -1; | |
1da177e4 LT |
691 | } |
692 | ||
920a4611 | 693 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
b71d1d42 ED |
694 | __be16 loc_port, const struct in6_addr *loc_addr, |
695 | __be16 rmt_port, const struct in6_addr *rmt_addr, | |
1da177e4 LT |
696 | int dif) |
697 | { | |
88ab1932 | 698 | struct hlist_nulls_node *node; |
1da177e4 LT |
699 | struct sock *s = sk; |
700 | unsigned short num = ntohs(loc_port); | |
701 | ||
88ab1932 | 702 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
703 | struct inet_sock *inet = inet_sk(s); |
704 | ||
920a4611 | 705 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
706 | continue; |
707 | ||
d4cada4a ED |
708 | if (udp_sk(s)->udp_port_hash == num && |
709 | s->sk_family == PF_INET6) { | |
c720c7e8 ED |
710 | if (inet->inet_dport) { |
711 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
712 | continue; |
713 | } | |
efe4208f ED |
714 | if (!ipv6_addr_any(&sk->sk_v6_daddr) && |
715 | !ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) | |
1da177e4 LT |
716 | continue; |
717 | ||
718 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
719 | continue; | |
720 | ||
efe4208f ED |
721 | if (!ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
722 | if (!ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)) | |
40796c5e | 723 | continue; |
1da177e4 | 724 | } |
add459aa | 725 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
726 | continue; |
727 | return s; | |
728 | } | |
729 | } | |
730 | return NULL; | |
731 | } | |
732 | ||
a1ab77f9 ED |
733 | static void flush_stack(struct sock **stack, unsigned int count, |
734 | struct sk_buff *skb, unsigned int final) | |
735 | { | |
cb80ef46 | 736 | struct sk_buff *skb1 = NULL; |
a1ab77f9 | 737 | struct sock *sk; |
cb80ef46 | 738 | unsigned int i; |
a1ab77f9 ED |
739 | |
740 | for (i = 0; i < count; i++) { | |
f6b8f32c | 741 | sk = stack[i]; |
cb80ef46 BL |
742 | if (likely(skb1 == NULL)) |
743 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
744 | if (!skb1) { | |
745 | atomic_inc(&sk->sk_drops); | |
746 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS, | |
747 | IS_UDPLITE(sk)); | |
748 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, | |
749 | IS_UDPLITE(sk)); | |
a1ab77f9 | 750 | } |
cb80ef46 BL |
751 | |
752 | if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) | |
753 | skb1 = NULL; | |
a1ab77f9 | 754 | } |
cb80ef46 BL |
755 | if (unlikely(skb1)) |
756 | kfree_skb(skb1); | |
a1ab77f9 | 757 | } |
1da177e4 LT |
758 | /* |
759 | * Note: called only from the BH handler context, | |
760 | * so we don't need to lock the hashes. | |
761 | */ | |
e3163493 | 762 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
b71d1d42 | 763 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
645ca708 | 764 | struct udp_table *udptable) |
1da177e4 | 765 | { |
a1ab77f9 | 766 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 767 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 768 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 769 | int dif; |
a1ab77f9 | 770 | unsigned int i, count = 0; |
1da177e4 | 771 | |
645ca708 | 772 | spin_lock(&hslot->lock); |
88ab1932 | 773 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 774 | dif = inet6_iif(skb); |
920a4611 | 775 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
776 | while (sk) { |
777 | stack[count++] = sk; | |
778 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
779 | uh->source, saddr, dif); | |
780 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
781 | if (!sk) | |
782 | break; | |
783 | flush_stack(stack, count, skb, ~0); | |
784 | count = 0; | |
95766fff | 785 | } |
1da177e4 | 786 | } |
a1ab77f9 ED |
787 | /* |
788 | * before releasing the lock, we must take reference on sockets | |
789 | */ | |
790 | for (i = 0; i < count; i++) | |
791 | sock_hold(stack[i]); | |
792 | ||
645ca708 | 793 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
794 | |
795 | if (count) { | |
796 | flush_stack(stack, count, skb, count - 1); | |
797 | ||
798 | for (i = 0; i < count; i++) | |
799 | sock_put(stack[i]); | |
800 | } else { | |
801 | kfree_skb(skb); | |
802 | } | |
ba4e58ec | 803 | return 0; |
1da177e4 LT |
804 | } |
805 | ||
645ca708 | 806 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 807 | int proto) |
1da177e4 | 808 | { |
3ffe533c | 809 | struct net *net = dev_net(skb->dev); |
1da177e4 | 810 | struct sock *sk; |
1ab1457c | 811 | struct udphdr *uh; |
b71d1d42 | 812 | const struct in6_addr *saddr, *daddr; |
1da177e4 LT |
813 | u32 ulen = 0; |
814 | ||
815 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 816 | goto discard; |
1da177e4 | 817 | |
0660e03f ACM |
818 | saddr = &ipv6_hdr(skb)->saddr; |
819 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 820 | uh = udp_hdr(skb); |
1da177e4 LT |
821 | |
822 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
823 | if (ulen > skb->len) |
824 | goto short_packet; | |
1da177e4 | 825 | |
759e5d00 HX |
826 | if (proto == IPPROTO_UDP) { |
827 | /* UDP validates ulen. */ | |
1da177e4 | 828 | |
ba4e58ec GR |
829 | /* Check for jumbo payload */ |
830 | if (ulen == 0) | |
831 | ulen = skb->len; | |
1da177e4 | 832 | |
ba4e58ec GR |
833 | if (ulen < sizeof(*uh)) |
834 | goto short_packet; | |
1da177e4 | 835 | |
ba4e58ec GR |
836 | if (ulen < skb->len) { |
837 | if (pskb_trim_rcsum(skb, ulen)) | |
838 | goto short_packet; | |
0660e03f ACM |
839 | saddr = &ipv6_hdr(skb)->saddr; |
840 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 841 | uh = udp_hdr(skb); |
ba4e58ec | 842 | } |
ba4e58ec | 843 | } |
1da177e4 | 844 | |
759e5d00 | 845 | if (udp6_csum_init(skb, uh, proto)) |
6a5dc9e5 | 846 | goto csum_error; |
759e5d00 | 847 | |
1ab1457c YH |
848 | /* |
849 | * Multicast receive code | |
1da177e4 | 850 | */ |
ba4e58ec | 851 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
852 | return __udp6_lib_mcast_deliver(net, skb, |
853 | saddr, daddr, udptable); | |
1da177e4 LT |
854 | |
855 | /* Unicast */ | |
856 | ||
1ab1457c | 857 | /* |
1da177e4 LT |
858 | * check socket cache ... must talk to Alan about his plans |
859 | * for sock caches... i'll skip this for now. | |
860 | */ | |
607c4aaf | 861 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
cb80ef46 | 862 | if (sk != NULL) { |
a5b50476 ET |
863 | int ret; |
864 | ||
a5b50476 | 865 | ret = udpv6_queue_rcv_skb(sk, skb); |
cb80ef46 | 866 | sock_put(sk); |
1da177e4 | 867 | |
cb80ef46 BL |
868 | /* a return value > 0 means to resubmit the input, but |
869 | * it wants the return to be -protocol, or 0 | |
870 | */ | |
871 | if (ret > 0) | |
872 | return -ret; | |
1da177e4 | 873 | |
add459aa | 874 | return 0; |
1da177e4 | 875 | } |
1ab1457c | 876 | |
cb80ef46 | 877 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
c377411f | 878 | goto discard; |
cb80ef46 BL |
879 | |
880 | if (udp_lib_checksum_complete(skb)) | |
6a5dc9e5 | 881 | goto csum_error; |
cb80ef46 BL |
882 | |
883 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); | |
884 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); | |
885 | ||
886 | kfree_skb(skb); | |
add459aa | 887 | return 0; |
1da177e4 | 888 | |
1ab1457c | 889 | short_packet: |
d6bc0149 | 890 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 891 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
892 | saddr, |
893 | ntohs(uh->source), | |
894 | ulen, | |
895 | skb->len, | |
896 | daddr, | |
897 | ntohs(uh->dest)); | |
6a5dc9e5 ED |
898 | goto discard; |
899 | csum_error: | |
900 | UDP6_INC_STATS_BH(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); | |
1da177e4 | 901 | discard: |
ef28d1a2 | 902 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 903 | kfree_skb(skb); |
add459aa | 904 | return 0; |
1da177e4 | 905 | } |
ba4e58ec | 906 | |
e5bbef20 | 907 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 908 | { |
645ca708 | 909 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
910 | } |
911 | ||
1da177e4 LT |
912 | /* |
913 | * Throw away all pending data and cancel the corking. Socket is locked. | |
914 | */ | |
915 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
916 | { | |
917 | struct udp_sock *up = udp_sk(sk); | |
918 | ||
36d926b9 DL |
919 | if (up->pending == AF_INET) |
920 | udp_flush_pending_frames(sk); | |
921 | else if (up->pending) { | |
1da177e4 LT |
922 | up->len = 0; |
923 | up->pending = 0; | |
924 | ip6_flush_pending_frames(sk); | |
1ab1457c | 925 | } |
1da177e4 LT |
926 | } |
927 | ||
493c6be3 SS |
928 | /** |
929 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
930 | * @sk: socket we are sending on | |
931 | * @skb: sk_buff containing the filled-in UDP header | |
932 | * (checksum field must be zeroed out) | |
933 | */ | |
934 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
935 | const struct in6_addr *saddr, | |
936 | const struct in6_addr *daddr, int len) | |
937 | { | |
938 | unsigned int offset; | |
939 | struct udphdr *uh = udp_hdr(skb); | |
940 | __wsum csum = 0; | |
941 | ||
942 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
943 | /* Only one fragment on the socket. */ | |
944 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
945 | skb->csum_offset = offsetof(struct udphdr, check); | |
946 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
947 | } else { | |
948 | /* | |
949 | * HW-checksum won't work as there are two or more | |
950 | * fragments on the socket so that all csums of sk_buffs | |
951 | * should be together | |
952 | */ | |
953 | offset = skb_transport_offset(skb); | |
954 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
955 | ||
956 | skb->ip_summed = CHECKSUM_NONE; | |
957 | ||
958 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
959 | csum = csum_add(csum, skb->csum); | |
960 | } | |
961 | ||
962 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
963 | csum); | |
964 | if (uh->check == 0) | |
965 | uh->check = CSUM_MANGLED_0; | |
966 | } | |
967 | } | |
968 | ||
1da177e4 LT |
969 | /* |
970 | * Sending | |
971 | */ | |
972 | ||
4c0a6cb0 | 973 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
974 | { |
975 | struct sk_buff *skb; | |
976 | struct udphdr *uh; | |
4c0a6cb0 | 977 | struct udp_sock *up = udp_sk(sk); |
1da177e4 | 978 | struct inet_sock *inet = inet_sk(sk); |
8822b64a | 979 | struct flowi6 *fl6; |
1da177e4 | 980 | int err = 0; |
b2bf1e26 | 981 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 982 | __wsum csum = 0; |
1da177e4 | 983 | |
8822b64a HFS |
984 | if (up->pending == AF_INET) |
985 | return udp_push_pending_frames(sk); | |
986 | ||
987 | fl6 = &inet->cork.fl.u.ip6; | |
988 | ||
1da177e4 LT |
989 | /* Grab the skbuff where UDP header space exists. */ |
990 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
991 | goto out; | |
992 | ||
993 | /* | |
994 | * Create a UDP header | |
995 | */ | |
4bedb452 | 996 | uh = udp_hdr(skb); |
1958b856 DM |
997 | uh->source = fl6->fl6_sport; |
998 | uh->dest = fl6->fl6_dport; | |
1da177e4 LT |
999 | uh->len = htons(up->len); |
1000 | uh->check = 0; | |
1001 | ||
b2bf1e26 | 1002 | if (is_udplite) |
ba4e58ec | 1003 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 | 1004 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
4c9483b2 | 1005 | udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, |
493c6be3 SS |
1006 | up->len); |
1007 | goto send; | |
1008 | } else | |
ba4e58ec | 1009 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 1010 | |
ba4e58ec | 1011 | /* add protocol-dependent pseudo-header */ |
4c9483b2 DM |
1012 | uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
1013 | up->len, fl6->flowi6_proto, csum); | |
1da177e4 | 1014 | if (uh->check == 0) |
f6ab0288 | 1015 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 1016 | |
493c6be3 | 1017 | send: |
1da177e4 | 1018 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
1019 | if (err) { |
1020 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
1021 | UDP6_INC_STATS_USER(sock_net(sk), | |
1022 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
1023 | err = 0; | |
1024 | } | |
1025 | } else | |
1026 | UDP6_INC_STATS_USER(sock_net(sk), | |
1027 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
1028 | out: |
1029 | up->len = 0; | |
1030 | up->pending = 0; | |
1031 | return err; | |
1032 | } | |
1033 | ||
ba4e58ec | 1034 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
1035 | struct msghdr *msg, size_t len) |
1036 | { | |
1037 | struct ipv6_txoptions opt_space; | |
1038 | struct udp_sock *up = udp_sk(sk); | |
1039 | struct inet_sock *inet = inet_sk(sk); | |
1040 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1041 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 1042 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
1043 | struct ipv6_txoptions *opt = NULL; |
1044 | struct ip6_flowlabel *flowlabel = NULL; | |
4c9483b2 | 1045 | struct flowi6 fl6; |
1da177e4 LT |
1046 | struct dst_entry *dst; |
1047 | int addr_len = msg->msg_namelen; | |
1048 | int ulen = len; | |
1049 | int hlimit = -1; | |
41a1f8ea | 1050 | int tclass = -1; |
13b52cd4 | 1051 | int dontfrag = -1; |
1da177e4 LT |
1052 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
1053 | int err; | |
987905de | 1054 | int connected = 0; |
b2bf1e26 | 1055 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 1056 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
1057 | |
1058 | /* destination address check */ | |
1059 | if (sin6) { | |
1060 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
1061 | return -EINVAL; | |
1062 | ||
1063 | switch (sin6->sin6_family) { | |
1064 | case AF_INET6: | |
1065 | if (addr_len < SIN6_LEN_RFC2133) | |
1066 | return -EINVAL; | |
1067 | daddr = &sin6->sin6_addr; | |
1068 | break; | |
1069 | case AF_INET: | |
1070 | goto do_udp_sendmsg; | |
1071 | case AF_UNSPEC: | |
1072 | msg->msg_name = sin6 = NULL; | |
1073 | msg->msg_namelen = addr_len = 0; | |
1074 | daddr = NULL; | |
1075 | break; | |
1076 | default: | |
1077 | return -EINVAL; | |
1078 | } | |
1079 | } else if (!up->pending) { | |
1080 | if (sk->sk_state != TCP_ESTABLISHED) | |
1081 | return -EDESTADDRREQ; | |
efe4208f | 1082 | daddr = &sk->sk_v6_daddr; |
1ab1457c | 1083 | } else |
1da177e4 LT |
1084 | daddr = NULL; |
1085 | ||
1086 | if (daddr) { | |
e773e4fa | 1087 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
1088 | struct sockaddr_in sin; |
1089 | sin.sin_family = AF_INET; | |
c720c7e8 | 1090 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
1091 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
1092 | msg->msg_name = &sin; | |
1093 | msg->msg_namelen = sizeof(sin); | |
1094 | do_udp_sendmsg: | |
1095 | if (__ipv6_only_sock(sk)) | |
1096 | return -ENETUNREACH; | |
1097 | return udp_sendmsg(iocb, sk, msg, len); | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | if (up->pending == AF_INET) | |
1102 | return udp_sendmsg(iocb, sk, msg, len); | |
1103 | ||
1104 | /* Rough check on arithmetic overflow, | |
b59e139b | 1105 | better check is made in ip6_append_data(). |
1da177e4 LT |
1106 | */ |
1107 | if (len > INT_MAX - sizeof(struct udphdr)) | |
1108 | return -EMSGSIZE; | |
1ab1457c | 1109 | |
1da177e4 LT |
1110 | if (up->pending) { |
1111 | /* | |
1112 | * There are pending frames. | |
1113 | * The socket lock must be held while it's corked. | |
1114 | */ | |
1115 | lock_sock(sk); | |
1116 | if (likely(up->pending)) { | |
1117 | if (unlikely(up->pending != AF_INET6)) { | |
1118 | release_sock(sk); | |
1119 | return -EAFNOSUPPORT; | |
1120 | } | |
1121 | dst = NULL; | |
1122 | goto do_append_data; | |
1123 | } | |
1124 | release_sock(sk); | |
1125 | } | |
1126 | ulen += sizeof(struct udphdr); | |
1127 | ||
4c9483b2 | 1128 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 LT |
1129 | |
1130 | if (sin6) { | |
1131 | if (sin6->sin6_port == 0) | |
1132 | return -EINVAL; | |
1133 | ||
1958b856 | 1134 | fl6.fl6_dport = sin6->sin6_port; |
1da177e4 LT |
1135 | daddr = &sin6->sin6_addr; |
1136 | ||
1137 | if (np->sndflow) { | |
4c9483b2 DM |
1138 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1139 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
1140 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1141 | if (flowlabel == NULL) |
1142 | return -EINVAL; | |
1143 | daddr = &flowlabel->dst; | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | /* | |
1148 | * Otherwise it will be difficult to maintain | |
1149 | * sk->sk_dst_cache. | |
1150 | */ | |
1151 | if (sk->sk_state == TCP_ESTABLISHED && | |
efe4208f ED |
1152 | ipv6_addr_equal(daddr, &sk->sk_v6_daddr)) |
1153 | daddr = &sk->sk_v6_daddr; | |
1da177e4 LT |
1154 | |
1155 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1156 | sin6->sin6_scope_id && | |
842df073 | 1157 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
4c9483b2 | 1158 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 LT |
1159 | } else { |
1160 | if (sk->sk_state != TCP_ESTABLISHED) | |
1161 | return -EDESTADDRREQ; | |
1162 | ||
1958b856 | 1163 | fl6.fl6_dport = inet->inet_dport; |
efe4208f | 1164 | daddr = &sk->sk_v6_daddr; |
4c9483b2 | 1165 | fl6.flowlabel = np->flow_label; |
987905de | 1166 | connected = 1; |
1da177e4 LT |
1167 | } |
1168 | ||
4c9483b2 DM |
1169 | if (!fl6.flowi6_oif) |
1170 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 | 1171 | |
4c9483b2 DM |
1172 | if (!fl6.flowi6_oif) |
1173 | fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; | |
9f690db7 | 1174 | |
4c9483b2 | 1175 | fl6.flowi6_mark = sk->sk_mark; |
51953d5b | 1176 | |
1da177e4 LT |
1177 | if (msg->msg_controllen) { |
1178 | opt = &opt_space; | |
1179 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1180 | opt->tot_len = sizeof(*opt); | |
1181 | ||
73df66f8 TP |
1182 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
1183 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
1184 | if (err < 0) { |
1185 | fl6_sock_release(flowlabel); | |
1186 | return err; | |
1187 | } | |
4c9483b2 DM |
1188 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1189 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1190 | if (flowlabel == NULL) |
1191 | return -EINVAL; | |
1192 | } | |
1193 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1194 | opt = NULL; | |
987905de | 1195 | connected = 0; |
1da177e4 LT |
1196 | } |
1197 | if (opt == NULL) | |
1198 | opt = np->opt; | |
df9890c3 YH |
1199 | if (flowlabel) |
1200 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1201 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1202 | |
4c9483b2 | 1203 | fl6.flowi6_proto = sk->sk_protocol; |
876c7f41 | 1204 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 1205 | fl6.daddr = *daddr; |
876c7f41 | 1206 | else |
4c9483b2 DM |
1207 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
1208 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 1209 | fl6.saddr = np->saddr; |
1958b856 | 1210 | fl6.fl6_sport = inet->inet_sport; |
1ab1457c | 1211 | |
4c9483b2 | 1212 | final_p = fl6_update_dst(&fl6, opt, &final); |
20c59de2 | 1213 | if (final_p) |
987905de | 1214 | connected = 0; |
1da177e4 | 1215 | |
4c9483b2 DM |
1216 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { |
1217 | fl6.flowi6_oif = np->mcast_oif; | |
987905de | 1218 | connected = 0; |
c4062dfc EH |
1219 | } else if (!fl6.flowi6_oif) |
1220 | fl6.flowi6_oif = np->ucast_oif; | |
1da177e4 | 1221 | |
4c9483b2 | 1222 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
beb8d13b | 1223 | |
4c9483b2 | 1224 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); |
68d0c6d3 DM |
1225 | if (IS_ERR(dst)) { |
1226 | err = PTR_ERR(dst); | |
1227 | dst = NULL; | |
1da177e4 | 1228 | goto out; |
14e50e57 | 1229 | } |
1da177e4 LT |
1230 | |
1231 | if (hlimit < 0) { | |
4c9483b2 | 1232 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
1da177e4 LT |
1233 | hlimit = np->mcast_hops; |
1234 | else | |
1235 | hlimit = np->hop_limit; | |
1236 | if (hlimit < 0) | |
6b75d090 | 1237 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1238 | } |
1239 | ||
e651f03a | 1240 | if (tclass < 0) |
41a1f8ea | 1241 | tclass = np->tclass; |
41a1f8ea | 1242 | |
1da177e4 LT |
1243 | if (msg->msg_flags&MSG_CONFIRM) |
1244 | goto do_confirm; | |
1245 | back_from_confirm: | |
1246 | ||
1247 | lock_sock(sk); | |
1248 | if (unlikely(up->pending)) { | |
1249 | /* The socket is already corked while preparing it. */ | |
1250 | /* ... which is an evident application bug. --ANK */ | |
1251 | release_sock(sk); | |
1252 | ||
64ce2073 | 1253 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1254 | err = -EINVAL; |
1255 | goto out; | |
1256 | } | |
1257 | ||
1258 | up->pending = AF_INET6; | |
1259 | ||
1260 | do_append_data: | |
e36d3ff9 JP |
1261 | if (dontfrag < 0) |
1262 | dontfrag = np->dontfrag; | |
1da177e4 | 1263 | up->len += ulen; |
ba4e58ec GR |
1264 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1265 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
4c9483b2 | 1266 | sizeof(struct udphdr), hlimit, tclass, opt, &fl6, |
41a1f8ea | 1267 | (struct rt6_info*)dst, |
13b52cd4 | 1268 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1269 | if (err) |
1270 | udp_v6_flush_pending_frames(sk); | |
1271 | else if (!corkreq) | |
4c0a6cb0 | 1272 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1273 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1274 | up->pending = 0; | |
1da177e4 | 1275 | |
a5e7c210 DM |
1276 | if (dst) { |
1277 | if (connected) { | |
1278 | ip6_dst_store(sk, dst, | |
efe4208f ED |
1279 | ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ? |
1280 | &sk->sk_v6_daddr : NULL, | |
8e1ef0a9 | 1281 | #ifdef CONFIG_IPV6_SUBTREES |
4c9483b2 | 1282 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
8e1ef0a9 YH |
1283 | &np->saddr : |
1284 | #endif | |
1285 | NULL); | |
a5e7c210 DM |
1286 | } else { |
1287 | dst_release(dst); | |
1288 | } | |
a3c96089 | 1289 | dst = NULL; |
a5e7c210 DM |
1290 | } |
1291 | ||
1da177e4 LT |
1292 | if (err > 0) |
1293 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1294 | release_sock(sk); | |
1295 | out: | |
a3c96089 | 1296 | dst_release(dst); |
1da177e4 | 1297 | fl6_sock_release(flowlabel); |
cd562c98 | 1298 | if (!err) |
1da177e4 | 1299 | return len; |
a18135eb DM |
1300 | /* |
1301 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1302 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1303 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1304 | * things). We could add another new stat but at least for now that | |
1305 | * seems like overkill. | |
1306 | */ | |
1307 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { | |
235b9f7a PE |
1308 | UDP6_INC_STATS_USER(sock_net(sk), |
1309 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1310 | } |
1da177e4 LT |
1311 | return err; |
1312 | ||
1313 | do_confirm: | |
1314 | dst_confirm(dst); | |
1315 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1316 | goto back_from_confirm; | |
1317 | err = 0; | |
1318 | goto out; | |
1319 | } | |
1320 | ||
7d06b2e0 | 1321 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 | 1322 | { |
44046a59 | 1323 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
1324 | lock_sock(sk); |
1325 | udp_v6_flush_pending_frames(sk); | |
1326 | release_sock(sk); | |
1327 | ||
44046a59 TP |
1328 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
1329 | void (*encap_destroy)(struct sock *sk); | |
1330 | encap_destroy = ACCESS_ONCE(up->encap_destroy); | |
1331 | if (encap_destroy) | |
1332 | encap_destroy(sk); | |
1333 | } | |
1334 | ||
1da177e4 | 1335 | inet6_destroy_sock(sk); |
1da177e4 LT |
1336 | } |
1337 | ||
1338 | /* | |
1339 | * Socket option code for UDP | |
1340 | */ | |
ba4e58ec | 1341 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1342 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1343 | { |
db8dac20 | 1344 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1345 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1346 | udp_v6_push_pending_frames); | |
ba4e58ec | 1347 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1348 | } |
1349 | ||
1350 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1351 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1352 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1353 | { |
db8dac20 | 1354 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1355 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1356 | udp_v6_push_pending_frames); | |
ba4e58ec | 1357 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1358 | } |
1359 | #endif | |
1360 | ||
ba4e58ec GR |
1361 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1362 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1363 | { |
db8dac20 | 1364 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1365 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1366 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1367 | } |
1368 | ||
1369 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1370 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1371 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1372 | { |
db8dac20 | 1373 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1374 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1375 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1376 | } |
1377 | #endif | |
1378 | ||
41135cc8 | 1379 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1380 | .handler = udpv6_rcv, |
1381 | .err_handler = udpv6_err, | |
1382 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1383 | }; | |
1384 | ||
1385 | /* ------------------------------------------------------------------------ */ | |
1386 | #ifdef CONFIG_PROC_FS | |
ba4e58ec | 1387 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 | 1388 | { |
17ef66af LC |
1389 | if (v == SEQ_START_TOKEN) { |
1390 | seq_puts(seq, IPV6_SEQ_DGRAM_HEADER); | |
1391 | } else { | |
1392 | int bucket = ((struct udp_iter_state *)seq->private)->bucket; | |
1393 | struct inet_sock *inet = inet_sk(v); | |
1394 | __u16 srcp = ntohs(inet->inet_sport); | |
1395 | __u16 destp = ntohs(inet->inet_dport); | |
1396 | ip6_dgram_sock_seq_show(seq, v, srcp, destp, bucket); | |
1397 | } | |
1da177e4 LT |
1398 | return 0; |
1399 | } | |
1400 | ||
73cb88ec AV |
1401 | static const struct file_operations udp6_afinfo_seq_fops = { |
1402 | .owner = THIS_MODULE, | |
1403 | .open = udp_seq_open, | |
1404 | .read = seq_read, | |
1405 | .llseek = seq_lseek, | |
1406 | .release = seq_release_net | |
1407 | }; | |
1408 | ||
1da177e4 | 1409 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1410 | .name = "udp6", |
1411 | .family = AF_INET6, | |
645ca708 | 1412 | .udp_table = &udp_table, |
73cb88ec | 1413 | .seq_fops = &udp6_afinfo_seq_fops, |
dda61925 DL |
1414 | .seq_ops = { |
1415 | .show = udp6_seq_show, | |
1416 | }, | |
1da177e4 LT |
1417 | }; |
1418 | ||
2c8c1e72 | 1419 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1420 | { |
0c96d8c5 | 1421 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1422 | } |
1423 | ||
0c96d8c5 DL |
1424 | void udp6_proc_exit(struct net *net) { |
1425 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1426 | } |
1427 | #endif /* CONFIG_PROC_FS */ | |
1428 | ||
f77d6021 ED |
1429 | void udp_v6_clear_sk(struct sock *sk, int size) |
1430 | { | |
1431 | struct inet_sock *inet = inet_sk(sk); | |
1432 | ||
1433 | /* we do not want to clear pinet6 field, because of RCU lookups */ | |
1434 | sk_prot_clear_portaddr_nulls(sk, offsetof(struct inet_sock, pinet6)); | |
1435 | ||
1436 | size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6); | |
1437 | memset(&inet->pinet6 + 1, 0, size); | |
1438 | } | |
1439 | ||
1da177e4 LT |
1440 | /* ------------------------------------------------------------------------ */ |
1441 | ||
1442 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1443 | .name = "UDPv6", |
1444 | .owner = THIS_MODULE, | |
ba4e58ec | 1445 | .close = udp_lib_close, |
543d9cfe ACM |
1446 | .connect = ip6_datagram_connect, |
1447 | .disconnect = udp_disconnect, | |
1448 | .ioctl = udp_ioctl, | |
1449 | .destroy = udpv6_destroy_sock, | |
1450 | .setsockopt = udpv6_setsockopt, | |
1451 | .getsockopt = udpv6_getsockopt, | |
1452 | .sendmsg = udpv6_sendmsg, | |
1453 | .recvmsg = udpv6_recvmsg, | |
f7ad74fe | 1454 | .backlog_rcv = __udpv6_queue_rcv_skb, |
ba4e58ec GR |
1455 | .hash = udp_lib_hash, |
1456 | .unhash = udp_lib_unhash, | |
719f8358 | 1457 | .rehash = udp_v6_rehash, |
543d9cfe | 1458 | .get_port = udp_v6_get_port, |
95766fff HA |
1459 | .memory_allocated = &udp_memory_allocated, |
1460 | .sysctl_mem = sysctl_udp_mem, | |
1461 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1462 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1463 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1464 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1465 | .h.udp_table = &udp_table, |
3fdadf7d | 1466 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1467 | .compat_setsockopt = compat_udpv6_setsockopt, |
1468 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1469 | #endif |
f77d6021 | 1470 | .clear_sk = udp_v6_clear_sk, |
1da177e4 LT |
1471 | }; |
1472 | ||
1da177e4 LT |
1473 | static struct inet_protosw udpv6_protosw = { |
1474 | .type = SOCK_DGRAM, | |
1475 | .protocol = IPPROTO_UDP, | |
1476 | .prot = &udpv6_prot, | |
1477 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1478 | .no_check = UDP_CSUM_DEFAULT, |
1479 | .flags = INET_PROTOSW_PERMANENT, | |
1480 | }; | |
1481 | ||
1482 | ||
7f4e4868 | 1483 | int __init udpv6_init(void) |
1da177e4 | 1484 | { |
7f4e4868 DL |
1485 | int ret; |
1486 | ||
3336288a VY |
1487 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); |
1488 | if (ret) | |
c6b641a4 | 1489 | goto out; |
3336288a | 1490 | |
7f4e4868 DL |
1491 | ret = inet6_register_protosw(&udpv6_protosw); |
1492 | if (ret) | |
1493 | goto out_udpv6_protocol; | |
1494 | out: | |
1495 | return ret; | |
1496 | ||
1497 | out_udpv6_protocol: | |
1498 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1499 | goto out; | |
1500 | } | |
1501 | ||
09f7709f | 1502 | void udpv6_exit(void) |
7f4e4868 DL |
1503 | { |
1504 | inet6_unregister_protosw(&udpv6_protosw); | |
1505 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1506 | } |