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> |
1da177e4 LT |
49 | |
50 | #include <linux/proc_fs.h> | |
51 | #include <linux/seq_file.h> | |
22911fc5 | 52 | #include <trace/events/skb.h> |
ba4e58ec | 53 | #include "udp_impl.h" |
1da177e4 | 54 | |
b2f5e7cd VY |
55 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) |
56 | { | |
57 | const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; | |
58 | const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); | |
68835aba ED |
59 | __be32 sk1_rcv_saddr = sk_rcv_saddr(sk); |
60 | __be32 sk2_rcv_saddr = sk_rcv_saddr(sk2); | |
b2f5e7cd VY |
61 | int sk_ipv6only = ipv6_only_sock(sk); |
62 | int sk2_ipv6only = inet_v6_ipv6only(sk2); | |
63 | int addr_type = ipv6_addr_type(sk_rcv_saddr6); | |
64 | int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; | |
65 | ||
66 | /* if both are mapped, treat as IPv4 */ | |
67 | if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) | |
499923c7 | 68 | return (!sk2_ipv6only && |
c720c7e8 ED |
69 | (!sk1_rcv_saddr || !sk2_rcv_saddr || |
70 | sk1_rcv_saddr == sk2_rcv_saddr)); | |
b2f5e7cd VY |
71 | |
72 | if (addr_type2 == IPV6_ADDR_ANY && | |
73 | !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) | |
74 | return 1; | |
75 | ||
76 | if (addr_type == IPV6_ADDR_ANY && | |
77 | !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) | |
78 | return 1; | |
79 | ||
80 | if (sk2_rcv_saddr6 && | |
81 | ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) | |
82 | return 1; | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
d4cada4a ED |
87 | static unsigned int udp6_portaddr_hash(struct net *net, |
88 | const struct in6_addr *addr6, | |
89 | unsigned int port) | |
90 | { | |
91 | unsigned int hash, mix = net_hash_mix(net); | |
92 | ||
93 | if (ipv6_addr_any(addr6)) | |
94 | hash = jhash_1word(0, mix); | |
856540ee | 95 | else if (ipv6_addr_v4mapped(addr6)) |
0eae88f3 | 96 | hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); |
d4cada4a | 97 | else |
0eae88f3 | 98 | hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); |
d4cada4a ED |
99 | |
100 | return hash ^ port; | |
101 | } | |
102 | ||
103 | ||
6ba5a3c5 | 104 | int udp_v6_get_port(struct sock *sk, unsigned short snum) |
1da177e4 | 105 | { |
30fff923 ED |
106 | unsigned int hash2_nulladdr = |
107 | udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum); | |
9a52e97e | 108 | unsigned int hash2_partial = |
30fff923 ED |
109 | udp6_portaddr_hash(sock_net(sk), &inet6_sk(sk)->rcv_saddr, 0); |
110 | ||
d4cada4a | 111 | /* precompute partial secondary hash */ |
30fff923 ED |
112 | udp_sk(sk)->udp_portaddr_hash = hash2_partial; |
113 | return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal, hash2_nulladdr); | |
1da177e4 LT |
114 | } |
115 | ||
719f8358 ED |
116 | static void udp_v6_rehash(struct sock *sk) |
117 | { | |
118 | u16 new_hash = udp6_portaddr_hash(sock_net(sk), | |
119 | &inet6_sk(sk)->rcv_saddr, | |
120 | inet_sk(sk)->inet_num); | |
121 | ||
122 | udp_lib_rehash(sk, new_hash); | |
123 | } | |
124 | ||
645ca708 ED |
125 | static inline int compute_score(struct sock *sk, struct net *net, |
126 | unsigned short hnum, | |
88440ae7 BS |
127 | const struct in6_addr *saddr, __be16 sport, |
128 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 ED |
129 | int dif) |
130 | { | |
131 | int score = -1; | |
132 | ||
d4cada4a | 133 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && |
645ca708 ED |
134 | sk->sk_family == PF_INET6) { |
135 | struct ipv6_pinfo *np = inet6_sk(sk); | |
136 | struct inet_sock *inet = inet_sk(sk); | |
137 | ||
138 | score = 0; | |
c720c7e8 ED |
139 | if (inet->inet_dport) { |
140 | if (inet->inet_dport != sport) | |
645ca708 ED |
141 | return -1; |
142 | score++; | |
143 | } | |
144 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
145 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
146 | return -1; | |
147 | score++; | |
148 | } | |
149 | if (!ipv6_addr_any(&np->daddr)) { | |
150 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
151 | return -1; | |
152 | score++; | |
153 | } | |
154 | if (sk->sk_bound_dev_if) { | |
155 | if (sk->sk_bound_dev_if != dif) | |
156 | return -1; | |
157 | score++; | |
158 | } | |
159 | } | |
160 | return score; | |
161 | } | |
162 | ||
fddc17de ED |
163 | #define SCORE2_MAX (1 + 1 + 1) |
164 | static inline int compute_score2(struct sock *sk, struct net *net, | |
165 | const struct in6_addr *saddr, __be16 sport, | |
166 | const struct in6_addr *daddr, unsigned short hnum, | |
167 | int dif) | |
168 | { | |
169 | int score = -1; | |
170 | ||
171 | if (net_eq(sock_net(sk), net) && udp_sk(sk)->udp_port_hash == hnum && | |
172 | sk->sk_family == PF_INET6) { | |
173 | struct ipv6_pinfo *np = inet6_sk(sk); | |
174 | struct inet_sock *inet = inet_sk(sk); | |
175 | ||
176 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
177 | return -1; | |
178 | score = 0; | |
179 | if (inet->inet_dport) { | |
180 | if (inet->inet_dport != sport) | |
181 | return -1; | |
182 | score++; | |
183 | } | |
184 | if (!ipv6_addr_any(&np->daddr)) { | |
185 | if (!ipv6_addr_equal(&np->daddr, saddr)) | |
186 | return -1; | |
187 | score++; | |
188 | } | |
189 | if (sk->sk_bound_dev_if) { | |
190 | if (sk->sk_bound_dev_if != dif) | |
191 | return -1; | |
192 | score++; | |
193 | } | |
194 | } | |
195 | return score; | |
196 | } | |
197 | ||
fddc17de ED |
198 | |
199 | /* called with read_rcu_lock() */ | |
200 | static struct sock *udp6_lib_lookup2(struct net *net, | |
201 | const struct in6_addr *saddr, __be16 sport, | |
202 | const struct in6_addr *daddr, unsigned int hnum, int dif, | |
203 | struct udp_hslot *hslot2, unsigned int slot2) | |
204 | { | |
205 | struct sock *sk, *result; | |
206 | struct hlist_nulls_node *node; | |
72289b96 TH |
207 | int score, badness, matches = 0, reuseport = 0; |
208 | u32 hash = 0; | |
fddc17de ED |
209 | |
210 | begin: | |
211 | result = NULL; | |
212 | badness = -1; | |
213 | udp_portaddr_for_each_entry_rcu(sk, node, &hslot2->head) { | |
214 | score = compute_score2(sk, net, saddr, sport, | |
215 | daddr, hnum, dif); | |
216 | if (score > badness) { | |
217 | result = sk; | |
218 | badness = score; | |
72289b96 TH |
219 | reuseport = sk->sk_reuseport; |
220 | if (reuseport) { | |
221 | hash = inet6_ehashfn(net, daddr, hnum, | |
222 | saddr, sport); | |
223 | matches = 1; | |
224 | } else if (score == SCORE2_MAX) | |
fddc17de | 225 | goto exact_match; |
72289b96 TH |
226 | } else if (score == badness && reuseport) { |
227 | matches++; | |
228 | if (((u64)hash * matches) >> 32 == 0) | |
229 | result = sk; | |
230 | hash = next_pseudo_random32(hash); | |
fddc17de ED |
231 | } |
232 | } | |
233 | /* | |
234 | * if the nulls value we got at the end of this lookup is | |
235 | * not the expected one, we must restart lookup. | |
236 | * We probably met an item that was moved to another chain. | |
237 | */ | |
238 | if (get_nulls_value(node) != slot2) | |
239 | goto begin; | |
240 | ||
241 | if (result) { | |
242 | exact_match: | |
c31504dc | 243 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
fddc17de ED |
244 | result = NULL; |
245 | else if (unlikely(compute_score2(result, net, saddr, sport, | |
246 | daddr, hnum, dif) < badness)) { | |
247 | sock_put(result); | |
248 | goto begin; | |
249 | } | |
250 | } | |
251 | return result; | |
252 | } | |
253 | ||
fce82338 | 254 | struct sock *__udp6_lib_lookup(struct net *net, |
88440ae7 BS |
255 | const struct in6_addr *saddr, __be16 sport, |
256 | const struct in6_addr *daddr, __be16 dport, | |
645ca708 | 257 | int dif, struct udp_table *udptable) |
1da177e4 | 258 | { |
271b72c7 | 259 | struct sock *sk, *result; |
88ab1932 | 260 | struct hlist_nulls_node *node; |
1da177e4 | 261 | unsigned short hnum = ntohs(dport); |
fddc17de ED |
262 | unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); |
263 | struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; | |
72289b96 TH |
264 | int score, badness, matches = 0, reuseport = 0; |
265 | u32 hash = 0; | |
645ca708 | 266 | |
271b72c7 | 267 | rcu_read_lock(); |
fddc17de ED |
268 | if (hslot->count > 10) { |
269 | hash2 = udp6_portaddr_hash(net, daddr, hnum); | |
270 | slot2 = hash2 & udptable->mask; | |
271 | hslot2 = &udptable->hash2[slot2]; | |
272 | if (hslot->count < hslot2->count) | |
273 | goto begin; | |
274 | ||
275 | result = udp6_lib_lookup2(net, saddr, sport, | |
276 | daddr, hnum, dif, | |
277 | hslot2, slot2); | |
278 | if (!result) { | |
279 | hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum); | |
280 | slot2 = hash2 & udptable->mask; | |
281 | hslot2 = &udptable->hash2[slot2]; | |
282 | if (hslot->count < hslot2->count) | |
283 | goto begin; | |
284 | ||
1223c67c JBD |
285 | result = udp6_lib_lookup2(net, saddr, sport, |
286 | &in6addr_any, hnum, dif, | |
fddc17de ED |
287 | hslot2, slot2); |
288 | } | |
289 | rcu_read_unlock(); | |
290 | return result; | |
291 | } | |
271b72c7 ED |
292 | begin: |
293 | result = NULL; | |
294 | badness = -1; | |
88ab1932 | 295 | sk_nulls_for_each_rcu(sk, node, &hslot->head) { |
645ca708 ED |
296 | score = compute_score(sk, net, hnum, saddr, sport, daddr, dport, dif); |
297 | if (score > badness) { | |
298 | result = sk; | |
299 | badness = score; | |
72289b96 TH |
300 | reuseport = sk->sk_reuseport; |
301 | if (reuseport) { | |
302 | hash = inet6_ehashfn(net, daddr, hnum, | |
303 | saddr, sport); | |
304 | matches = 1; | |
305 | } | |
306 | } else if (score == badness && reuseport) { | |
307 | matches++; | |
308 | if (((u64)hash * matches) >> 32 == 0) | |
309 | result = sk; | |
310 | hash = next_pseudo_random32(hash); | |
1da177e4 LT |
311 | } |
312 | } | |
88ab1932 ED |
313 | /* |
314 | * if the nulls value we got at the end of this lookup is | |
315 | * not the expected one, we must restart lookup. | |
316 | * We probably met an item that was moved to another chain. | |
317 | */ | |
fddc17de | 318 | if (get_nulls_value(node) != slot) |
88ab1932 ED |
319 | goto begin; |
320 | ||
271b72c7 | 321 | if (result) { |
c31504dc | 322 | if (unlikely(!atomic_inc_not_zero_hint(&result->sk_refcnt, 2))) |
271b72c7 ED |
323 | result = NULL; |
324 | else if (unlikely(compute_score(result, net, hnum, saddr, sport, | |
325 | daddr, dport, dif) < badness)) { | |
326 | sock_put(result); | |
327 | goto begin; | |
328 | } | |
329 | } | |
330 | rcu_read_unlock(); | |
1da177e4 LT |
331 | return result; |
332 | } | |
fce82338 | 333 | EXPORT_SYMBOL_GPL(__udp6_lib_lookup); |
1da177e4 | 334 | |
607c4aaf KK |
335 | static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb, |
336 | __be16 sport, __be16 dport, | |
645ca708 | 337 | struct udp_table *udptable) |
607c4aaf | 338 | { |
23542618 | 339 | struct sock *sk; |
b71d1d42 | 340 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
607c4aaf | 341 | |
23542618 KK |
342 | if (unlikely(sk = skb_steal_sock(skb))) |
343 | return sk; | |
adf30907 ED |
344 | return __udp6_lib_lookup(dev_net(skb_dst(skb)->dev), &iph->saddr, sport, |
345 | &iph->daddr, dport, inet6_iif(skb), | |
346 | udptable); | |
607c4aaf KK |
347 | } |
348 | ||
aa976fc0 BS |
349 | struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, |
350 | const struct in6_addr *daddr, __be16 dport, int dif) | |
351 | { | |
352 | return __udp6_lib_lookup(net, saddr, sport, daddr, dport, dif, &udp_table); | |
353 | } | |
354 | EXPORT_SYMBOL_GPL(udp6_lib_lookup); | |
355 | ||
356 | ||
1da177e4 LT |
357 | /* |
358 | * This should be easy, if there is something there we | |
359 | * return it, otherwise we block. | |
360 | */ | |
361 | ||
ba4e58ec | 362 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
363 | struct msghdr *msg, size_t len, |
364 | int noblock, int flags, int *addr_len) | |
365 | { | |
366 | struct ipv6_pinfo *np = inet6_sk(sk); | |
367 | struct inet_sock *inet = inet_sk(sk); | |
1ab1457c | 368 | struct sk_buff *skb; |
59c2cdae | 369 | unsigned int ulen, copied; |
3f518bf7 | 370 | int peeked, off = 0; |
759e5d00 HX |
371 | int err; |
372 | int is_udplite = IS_UDPLITE(sk); | |
4b9e9796 | 373 | bool checksum_valid = false; |
f26ba175 | 374 | int is_udp4; |
8a74ad60 | 375 | bool slow; |
1da177e4 | 376 | |
1da177e4 | 377 | if (flags & MSG_ERRQUEUE) |
08c62a10 | 378 | return ipv6_recv_error(sk, msg, len, addr_len); |
1da177e4 | 379 | |
4b340ae2 | 380 | if (np->rxpmtu && np->rxopt.bits.rxpmtu) |
08c62a10 | 381 | return ipv6_recv_rxpmtu(sk, msg, len, addr_len); |
4b340ae2 | 382 | |
1da177e4 | 383 | try_again: |
a59322be | 384 | skb = __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), |
3f518bf7 | 385 | &peeked, &off, &err); |
1da177e4 LT |
386 | if (!skb) |
387 | goto out; | |
388 | ||
759e5d00 | 389 | ulen = skb->len - sizeof(struct udphdr); |
59c2cdae DM |
390 | copied = len; |
391 | if (copied > ulen) | |
392 | copied = ulen; | |
393 | else if (copied < ulen) | |
1ab1457c | 394 | msg->msg_flags |= MSG_TRUNC; |
1da177e4 | 395 | |
f26ba175 WY |
396 | is_udp4 = (skb->protocol == htons(ETH_P_IP)); |
397 | ||
ba4e58ec | 398 | /* |
759e5d00 HX |
399 | * If checksum is needed at all, try to do it while copying the |
400 | * data. If the data is truncated, or if we only want a partial | |
401 | * coverage checksum (UDP-Lite), do it before the copy. | |
ba4e58ec | 402 | */ |
ba4e58ec | 403 | |
59c2cdae | 404 | if (copied < ulen || UDP_SKB_CB(skb)->partial_cov) { |
4b9e9796 S |
405 | checksum_valid = !udp_lib_checksum_complete(skb); |
406 | if (!checksum_valid) | |
1da177e4 | 407 | goto csum_copy_err; |
ba4e58ec GR |
408 | } |
409 | ||
4b9e9796 | 410 | if (checksum_valid || skb_csum_unnecessary(skb)) |
ba4e58ec | 411 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
22911fc5 | 412 | msg->msg_iov, copied); |
ba4e58ec | 413 | else { |
1da177e4 LT |
414 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
415 | if (err == -EINVAL) | |
416 | goto csum_copy_err; | |
417 | } | |
22911fc5 ED |
418 | if (unlikely(err)) { |
419 | trace_kfree_skb(skb, udpv6_recvmsg); | |
979402b1 ED |
420 | if (!peeked) { |
421 | atomic_inc(&sk->sk_drops); | |
422 | if (is_udp4) | |
423 | UDP_INC_STATS_USER(sock_net(sk), | |
424 | UDP_MIB_INERRORS, | |
425 | is_udplite); | |
426 | else | |
427 | UDP6_INC_STATS_USER(sock_net(sk), | |
428 | UDP_MIB_INERRORS, | |
429 | is_udplite); | |
430 | } | |
1da177e4 | 431 | goto out_free; |
22911fc5 | 432 | } |
f26ba175 WY |
433 | if (!peeked) { |
434 | if (is_udp4) | |
435 | UDP_INC_STATS_USER(sock_net(sk), | |
436 | UDP_MIB_INDATAGRAMS, is_udplite); | |
437 | else | |
438 | UDP6_INC_STATS_USER(sock_net(sk), | |
439 | UDP_MIB_INDATAGRAMS, is_udplite); | |
440 | } | |
cb75994e | 441 | |
3b885787 | 442 | sock_recv_ts_and_drops(msg, sk, skb); |
1da177e4 LT |
443 | |
444 | /* Copy the address. */ | |
445 | if (msg->msg_name) { | |
446 | struct sockaddr_in6 *sin6; | |
1ab1457c | 447 | |
1da177e4 LT |
448 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
449 | sin6->sin6_family = AF_INET6; | |
4bedb452 | 450 | sin6->sin6_port = udp_hdr(skb)->source; |
1da177e4 | 451 | sin6->sin6_flowinfo = 0; |
1da177e4 | 452 | |
842df073 | 453 | if (is_udp4) { |
b301e82c BH |
454 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
455 | &sin6->sin6_addr); | |
842df073 HFS |
456 | sin6->sin6_scope_id = 0; |
457 | } else { | |
4e3fd7a0 | 458 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
842df073 HFS |
459 | sin6->sin6_scope_id = |
460 | ipv6_iface_scope_id(&sin6->sin6_addr, | |
461 | IP6CB(skb)->iif); | |
1da177e4 | 462 | } |
a2214488 | 463 | *addr_len = sizeof(*sin6); |
1da177e4 | 464 | } |
f26ba175 | 465 | if (is_udp4) { |
1da177e4 LT |
466 | if (inet->cmsg_flags) |
467 | ip_cmsg_recv(msg, skb); | |
468 | } else { | |
469 | if (np->rxopt.all) | |
73df66f8 | 470 | ip6_datagram_recv_ctl(sk, msg, skb); |
1ab1457c | 471 | } |
1da177e4 | 472 | |
59c2cdae | 473 | err = copied; |
1da177e4 | 474 | if (flags & MSG_TRUNC) |
759e5d00 | 475 | err = ulen; |
1da177e4 LT |
476 | |
477 | out_free: | |
9d410c79 | 478 | skb_free_datagram_locked(sk, skb); |
1da177e4 LT |
479 | out: |
480 | return err; | |
481 | ||
482 | csum_copy_err: | |
8a74ad60 | 483 | slow = lock_sock_fast(sk); |
0856f939 | 484 | if (!skb_kill_datagram(sk, skb, flags)) { |
6a5dc9e5 ED |
485 | if (is_udp4) { |
486 | UDP_INC_STATS_USER(sock_net(sk), | |
487 | UDP_MIB_CSUMERRORS, is_udplite); | |
0856f939 WY |
488 | UDP_INC_STATS_USER(sock_net(sk), |
489 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 ED |
490 | } else { |
491 | UDP6_INC_STATS_USER(sock_net(sk), | |
492 | UDP_MIB_CSUMERRORS, is_udplite); | |
0856f939 WY |
493 | UDP6_INC_STATS_USER(sock_net(sk), |
494 | UDP_MIB_INERRORS, is_udplite); | |
6a5dc9e5 | 495 | } |
0856f939 | 496 | } |
8a74ad60 | 497 | unlock_sock_fast(sk, slow); |
1da177e4 | 498 | |
4b9e9796 S |
499 | /* starting over for a new packet, but check if we need to yield */ |
500 | cond_resched(); | |
9cfaa8de | 501 | msg->msg_flags &= ~MSG_TRUNC; |
1da177e4 LT |
502 | goto try_again; |
503 | } | |
504 | ||
ba4e58ec | 505 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
d5fdd6ba | 506 | u8 type, u8 code, int offset, __be32 info, |
645ca708 | 507 | struct udp_table *udptable) |
1da177e4 LT |
508 | { |
509 | struct ipv6_pinfo *np; | |
b71d1d42 ED |
510 | const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data; |
511 | const struct in6_addr *saddr = &hdr->saddr; | |
512 | const struct in6_addr *daddr = &hdr->daddr; | |
1da177e4 LT |
513 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); |
514 | struct sock *sk; | |
515 | int err; | |
516 | ||
c346dca1 | 517 | sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest, |
ba4e58ec | 518 | saddr, uh->source, inet6_iif(skb), udptable); |
1da177e4 LT |
519 | if (sk == NULL) |
520 | return; | |
521 | ||
81aded24 DM |
522 | if (type == ICMPV6_PKT_TOOBIG) |
523 | ip6_sk_update_pmtu(skb, sk, info); | |
ec18d9a2 DM |
524 | if (type == NDISC_REDIRECT) |
525 | ip6_sk_redirect(skb, sk); | |
81aded24 | 526 | |
1da177e4 LT |
527 | np = inet6_sk(sk); |
528 | ||
529 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) | |
530 | goto out; | |
531 | ||
532 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) | |
533 | goto out; | |
534 | ||
b1faf566 | 535 | if (np->recverr) |
1da177e4 | 536 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
b1faf566 | 537 | |
1da177e4 LT |
538 | sk->sk_err = err; |
539 | sk->sk_error_report(sk); | |
540 | out: | |
541 | sock_put(sk); | |
542 | } | |
543 | ||
f7ad74fe BL |
544 | static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
545 | { | |
546 | int rc; | |
547 | ||
548 | if (!ipv6_addr_any(&inet6_sk(sk)->daddr)) | |
549 | sock_rps_save_rxhash(sk, skb); | |
550 | ||
551 | rc = sock_queue_rcv_skb(sk, skb); | |
552 | if (rc < 0) { | |
553 | int is_udplite = IS_UDPLITE(sk); | |
554 | ||
555 | /* Note that an ENOMEM error is charged twice */ | |
556 | if (rc == -ENOMEM) | |
557 | UDP6_INC_STATS_BH(sock_net(sk), | |
558 | UDP_MIB_RCVBUFERRORS, is_udplite); | |
559 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); | |
560 | kfree_skb(skb); | |
561 | return -1; | |
562 | } | |
563 | return 0; | |
564 | } | |
565 | ||
ba4e58ec | 566 | static __inline__ void udpv6_err(struct sk_buff *skb, |
d5fdd6ba BH |
567 | struct inet6_skb_parm *opt, u8 type, |
568 | u8 code, int offset, __be32 info ) | |
ba4e58ec | 569 | { |
645ca708 | 570 | __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); |
ba4e58ec GR |
571 | } |
572 | ||
d7f3f621 BL |
573 | static struct static_key udpv6_encap_needed __read_mostly; |
574 | void udpv6_encap_enable(void) | |
575 | { | |
576 | if (!static_key_enabled(&udpv6_encap_needed)) | |
577 | static_key_slow_inc(&udpv6_encap_needed); | |
578 | } | |
579 | EXPORT_SYMBOL(udpv6_encap_enable); | |
580 | ||
f7ad74fe | 581 | int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
1da177e4 | 582 | { |
ba4e58ec | 583 | struct udp_sock *up = udp_sk(sk); |
a18135eb | 584 | int rc; |
b2bf1e26 | 585 | int is_udplite = IS_UDPLITE(sk); |
a18135eb | 586 | |
ba4e58ec GR |
587 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
588 | goto drop; | |
1da177e4 | 589 | |
d7f3f621 BL |
590 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
591 | int (*encap_rcv)(struct sock *sk, struct sk_buff *skb); | |
592 | ||
593 | /* | |
594 | * This is an encapsulation socket so pass the skb to | |
595 | * the socket's udp_encap_rcv() hook. Otherwise, just | |
596 | * fall through and pass this up the UDP socket. | |
597 | * up->encap_rcv() returns the following value: | |
598 | * =0 if skb was successfully passed to the encap | |
599 | * handler or was discarded by it. | |
600 | * >0 if skb should be passed on to UDP. | |
601 | * <0 if skb should be resubmitted as proto -N | |
602 | */ | |
603 | ||
604 | /* if we're overly short, let UDP handle it */ | |
605 | encap_rcv = ACCESS_ONCE(up->encap_rcv); | |
606 | if (skb->len > sizeof(struct udphdr) && encap_rcv != NULL) { | |
607 | int ret; | |
608 | ||
609 | ret = encap_rcv(sk, skb); | |
610 | if (ret <= 0) { | |
611 | UDP_INC_STATS_BH(sock_net(sk), | |
612 | UDP_MIB_INDATAGRAMS, | |
613 | is_udplite); | |
614 | return -ret; | |
615 | } | |
616 | } | |
617 | ||
618 | /* FALLTHROUGH -- it's a UDP Packet */ | |
619 | } | |
620 | ||
ba4e58ec GR |
621 | /* |
622 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). | |
623 | */ | |
b2bf1e26 | 624 | if ((is_udplite & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
ba4e58ec GR |
625 | |
626 | if (up->pcrlen == 0) { /* full coverage was set */ | |
627 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" | |
628 | " %d while full coverage %d requested\n", | |
629 | UDP_SKB_CB(skb)->cscov, skb->len); | |
630 | goto drop; | |
631 | } | |
632 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { | |
633 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " | |
634 | "too small, need min %d\n", | |
635 | UDP_SKB_CB(skb)->cscov, up->pcrlen); | |
636 | goto drop; | |
637 | } | |
1da177e4 LT |
638 | } |
639 | ||
33d480ce | 640 | if (rcu_access_pointer(sk->sk_filter)) { |
1ab6eb62 | 641 | if (udp_lib_checksum_complete(skb)) |
6a5dc9e5 | 642 | goto csum_error; |
1ab6eb62 | 643 | } |
ba4e58ec | 644 | |
cb80ef46 BL |
645 | if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) |
646 | goto drop; | |
647 | ||
d826eb14 | 648 | skb_dst_drop(skb); |
cb75994e | 649 | |
cb80ef46 BL |
650 | bh_lock_sock(sk); |
651 | rc = 0; | |
652 | if (!sock_owned_by_user(sk)) | |
653 | rc = __udpv6_queue_rcv_skb(sk, skb); | |
654 | else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) { | |
655 | bh_unlock_sock(sk); | |
656 | goto drop; | |
657 | } | |
658 | bh_unlock_sock(sk); | |
f7ad74fe BL |
659 | |
660 | return rc; | |
6a5dc9e5 ED |
661 | csum_error: |
662 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); | |
ba4e58ec | 663 | drop: |
ef28d1a2 | 664 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); |
cb80ef46 | 665 | atomic_inc(&sk->sk_drops); |
ba4e58ec GR |
666 | kfree_skb(skb); |
667 | return -1; | |
1da177e4 LT |
668 | } |
669 | ||
920a4611 | 670 | static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk, |
b71d1d42 ED |
671 | __be16 loc_port, const struct in6_addr *loc_addr, |
672 | __be16 rmt_port, const struct in6_addr *rmt_addr, | |
1da177e4 LT |
673 | int dif) |
674 | { | |
88ab1932 | 675 | struct hlist_nulls_node *node; |
1da177e4 LT |
676 | struct sock *s = sk; |
677 | unsigned short num = ntohs(loc_port); | |
678 | ||
88ab1932 | 679 | sk_nulls_for_each_from(s, node) { |
1da177e4 LT |
680 | struct inet_sock *inet = inet_sk(s); |
681 | ||
920a4611 | 682 | if (!net_eq(sock_net(s), net)) |
b8ad0cbc DL |
683 | continue; |
684 | ||
d4cada4a ED |
685 | if (udp_sk(s)->udp_port_hash == num && |
686 | s->sk_family == PF_INET6) { | |
1da177e4 | 687 | struct ipv6_pinfo *np = inet6_sk(s); |
c720c7e8 ED |
688 | if (inet->inet_dport) { |
689 | if (inet->inet_dport != rmt_port) | |
1da177e4 LT |
690 | continue; |
691 | } | |
692 | if (!ipv6_addr_any(&np->daddr) && | |
693 | !ipv6_addr_equal(&np->daddr, rmt_addr)) | |
694 | continue; | |
695 | ||
696 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) | |
697 | continue; | |
698 | ||
699 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40796c5e DS |
700 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
701 | continue; | |
1da177e4 | 702 | } |
add459aa | 703 | if (!inet6_mc_check(s, loc_addr, rmt_addr)) |
1da177e4 LT |
704 | continue; |
705 | return s; | |
706 | } | |
707 | } | |
708 | return NULL; | |
709 | } | |
710 | ||
a1ab77f9 ED |
711 | static void flush_stack(struct sock **stack, unsigned int count, |
712 | struct sk_buff *skb, unsigned int final) | |
713 | { | |
cb80ef46 | 714 | struct sk_buff *skb1 = NULL; |
a1ab77f9 | 715 | struct sock *sk; |
cb80ef46 | 716 | unsigned int i; |
a1ab77f9 ED |
717 | |
718 | for (i = 0; i < count; i++) { | |
f6b8f32c | 719 | sk = stack[i]; |
cb80ef46 BL |
720 | if (likely(skb1 == NULL)) |
721 | skb1 = (i == final) ? skb : skb_clone(skb, GFP_ATOMIC); | |
722 | if (!skb1) { | |
723 | atomic_inc(&sk->sk_drops); | |
724 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS, | |
725 | IS_UDPLITE(sk)); | |
726 | UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, | |
727 | IS_UDPLITE(sk)); | |
a1ab77f9 | 728 | } |
cb80ef46 BL |
729 | |
730 | if (skb1 && udpv6_queue_rcv_skb(sk, skb1) <= 0) | |
731 | skb1 = NULL; | |
a1ab77f9 | 732 | } |
cb80ef46 BL |
733 | if (unlikely(skb1)) |
734 | kfree_skb(skb1); | |
a1ab77f9 | 735 | } |
1da177e4 LT |
736 | /* |
737 | * Note: called only from the BH handler context, | |
738 | * so we don't need to lock the hashes. | |
739 | */ | |
e3163493 | 740 | static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb, |
b71d1d42 | 741 | const struct in6_addr *saddr, const struct in6_addr *daddr, |
645ca708 | 742 | struct udp_table *udptable) |
1da177e4 | 743 | { |
a1ab77f9 | 744 | struct sock *sk, *stack[256 / sizeof(struct sock *)]; |
4bedb452 | 745 | const struct udphdr *uh = udp_hdr(skb); |
f86dcc5a | 746 | struct udp_hslot *hslot = udp_hashslot(udptable, net, ntohs(uh->dest)); |
1da177e4 | 747 | int dif; |
a1ab77f9 | 748 | unsigned int i, count = 0; |
1da177e4 | 749 | |
645ca708 | 750 | spin_lock(&hslot->lock); |
88ab1932 | 751 | sk = sk_nulls_head(&hslot->head); |
f2776ff0 | 752 | dif = inet6_iif(skb); |
920a4611 | 753 | sk = udp_v6_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif); |
a1ab77f9 ED |
754 | while (sk) { |
755 | stack[count++] = sk; | |
756 | sk = udp_v6_mcast_next(net, sk_nulls_next(sk), uh->dest, daddr, | |
757 | uh->source, saddr, dif); | |
758 | if (unlikely(count == ARRAY_SIZE(stack))) { | |
759 | if (!sk) | |
760 | break; | |
761 | flush_stack(stack, count, skb, ~0); | |
762 | count = 0; | |
95766fff | 763 | } |
1da177e4 | 764 | } |
a1ab77f9 ED |
765 | /* |
766 | * before releasing the lock, we must take reference on sockets | |
767 | */ | |
768 | for (i = 0; i < count; i++) | |
769 | sock_hold(stack[i]); | |
770 | ||
645ca708 | 771 | spin_unlock(&hslot->lock); |
a1ab77f9 ED |
772 | |
773 | if (count) { | |
774 | flush_stack(stack, count, skb, count - 1); | |
775 | ||
776 | for (i = 0; i < count; i++) | |
777 | sock_put(stack[i]); | |
778 | } else { | |
779 | kfree_skb(skb); | |
780 | } | |
ba4e58ec | 781 | return 0; |
1da177e4 LT |
782 | } |
783 | ||
645ca708 | 784 | int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, |
759e5d00 | 785 | int proto) |
1da177e4 | 786 | { |
3ffe533c | 787 | struct net *net = dev_net(skb->dev); |
1da177e4 | 788 | struct sock *sk; |
1ab1457c | 789 | struct udphdr *uh; |
b71d1d42 | 790 | const struct in6_addr *saddr, *daddr; |
1da177e4 LT |
791 | u32 ulen = 0; |
792 | ||
793 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) | |
d6bc0149 | 794 | goto discard; |
1da177e4 | 795 | |
0660e03f ACM |
796 | saddr = &ipv6_hdr(skb)->saddr; |
797 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 798 | uh = udp_hdr(skb); |
1da177e4 LT |
799 | |
800 | ulen = ntohs(uh->len); | |
ba4e58ec GR |
801 | if (ulen > skb->len) |
802 | goto short_packet; | |
1da177e4 | 803 | |
759e5d00 HX |
804 | if (proto == IPPROTO_UDP) { |
805 | /* UDP validates ulen. */ | |
1da177e4 | 806 | |
ba4e58ec GR |
807 | /* Check for jumbo payload */ |
808 | if (ulen == 0) | |
809 | ulen = skb->len; | |
1da177e4 | 810 | |
ba4e58ec GR |
811 | if (ulen < sizeof(*uh)) |
812 | goto short_packet; | |
1da177e4 | 813 | |
ba4e58ec GR |
814 | if (ulen < skb->len) { |
815 | if (pskb_trim_rcsum(skb, ulen)) | |
816 | goto short_packet; | |
0660e03f ACM |
817 | saddr = &ipv6_hdr(skb)->saddr; |
818 | daddr = &ipv6_hdr(skb)->daddr; | |
4bedb452 | 819 | uh = udp_hdr(skb); |
ba4e58ec | 820 | } |
ba4e58ec | 821 | } |
1da177e4 | 822 | |
759e5d00 | 823 | if (udp6_csum_init(skb, uh, proto)) |
6a5dc9e5 | 824 | goto csum_error; |
759e5d00 | 825 | |
1ab1457c YH |
826 | /* |
827 | * Multicast receive code | |
1da177e4 | 828 | */ |
ba4e58ec | 829 | if (ipv6_addr_is_multicast(daddr)) |
e3163493 PE |
830 | return __udp6_lib_mcast_deliver(net, skb, |
831 | saddr, daddr, udptable); | |
1da177e4 LT |
832 | |
833 | /* Unicast */ | |
834 | ||
1ab1457c | 835 | /* |
1da177e4 LT |
836 | * check socket cache ... must talk to Alan about his plans |
837 | * for sock caches... i'll skip this for now. | |
838 | */ | |
607c4aaf | 839 | sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable); |
cb80ef46 BL |
840 | if (sk != NULL) { |
841 | int ret = udpv6_queue_rcv_skb(sk, skb); | |
842 | sock_put(sk); | |
1da177e4 | 843 | |
952bca89 | 844 | /* a return value > 0 means to resubmit the input */ |
cb80ef46 | 845 | if (ret > 0) |
952bca89 | 846 | return ret; |
1da177e4 | 847 | |
add459aa | 848 | return 0; |
1da177e4 | 849 | } |
1ab1457c | 850 | |
cb80ef46 | 851 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
c377411f | 852 | goto discard; |
cb80ef46 BL |
853 | |
854 | if (udp_lib_checksum_complete(skb)) | |
6a5dc9e5 | 855 | goto csum_error; |
cb80ef46 BL |
856 | |
857 | UDP6_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); | |
858 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); | |
859 | ||
860 | kfree_skb(skb); | |
add459aa | 861 | return 0; |
1da177e4 | 862 | |
1ab1457c | 863 | short_packet: |
d6bc0149 | 864 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", |
db8dac20 | 865 | proto == IPPROTO_UDPLITE ? "-Lite" : "", |
d6bc0149 BM |
866 | saddr, |
867 | ntohs(uh->source), | |
868 | ulen, | |
869 | skb->len, | |
870 | daddr, | |
871 | ntohs(uh->dest)); | |
6a5dc9e5 ED |
872 | goto discard; |
873 | csum_error: | |
874 | UDP6_INC_STATS_BH(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); | |
1da177e4 | 875 | discard: |
ef28d1a2 | 876 | UDP6_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); |
1da177e4 | 877 | kfree_skb(skb); |
add459aa | 878 | return 0; |
1da177e4 | 879 | } |
ba4e58ec | 880 | |
e5bbef20 | 881 | static __inline__ int udpv6_rcv(struct sk_buff *skb) |
ba4e58ec | 882 | { |
645ca708 | 883 | return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); |
ba4e58ec GR |
884 | } |
885 | ||
1da177e4 LT |
886 | /* |
887 | * Throw away all pending data and cancel the corking. Socket is locked. | |
888 | */ | |
889 | static void udp_v6_flush_pending_frames(struct sock *sk) | |
890 | { | |
891 | struct udp_sock *up = udp_sk(sk); | |
892 | ||
36d926b9 DL |
893 | if (up->pending == AF_INET) |
894 | udp_flush_pending_frames(sk); | |
895 | else if (up->pending) { | |
1da177e4 LT |
896 | up->len = 0; |
897 | up->pending = 0; | |
898 | ip6_flush_pending_frames(sk); | |
1ab1457c | 899 | } |
1da177e4 LT |
900 | } |
901 | ||
493c6be3 SS |
902 | /** |
903 | * udp6_hwcsum_outgoing - handle outgoing HW checksumming | |
904 | * @sk: socket we are sending on | |
905 | * @skb: sk_buff containing the filled-in UDP header | |
906 | * (checksum field must be zeroed out) | |
907 | */ | |
908 | static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb, | |
909 | const struct in6_addr *saddr, | |
910 | const struct in6_addr *daddr, int len) | |
911 | { | |
912 | unsigned int offset; | |
913 | struct udphdr *uh = udp_hdr(skb); | |
914 | __wsum csum = 0; | |
915 | ||
916 | if (skb_queue_len(&sk->sk_write_queue) == 1) { | |
917 | /* Only one fragment on the socket. */ | |
918 | skb->csum_start = skb_transport_header(skb) - skb->head; | |
919 | skb->csum_offset = offsetof(struct udphdr, check); | |
920 | uh->check = ~csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, 0); | |
921 | } else { | |
922 | /* | |
923 | * HW-checksum won't work as there are two or more | |
924 | * fragments on the socket so that all csums of sk_buffs | |
925 | * should be together | |
926 | */ | |
927 | offset = skb_transport_offset(skb); | |
928 | skb->csum = skb_checksum(skb, offset, skb->len - offset, 0); | |
929 | ||
930 | skb->ip_summed = CHECKSUM_NONE; | |
931 | ||
932 | skb_queue_walk(&sk->sk_write_queue, skb) { | |
933 | csum = csum_add(csum, skb->csum); | |
934 | } | |
935 | ||
936 | uh->check = csum_ipv6_magic(saddr, daddr, len, IPPROTO_UDP, | |
937 | csum); | |
938 | if (uh->check == 0) | |
939 | uh->check = CSUM_MANGLED_0; | |
940 | } | |
941 | } | |
942 | ||
1da177e4 LT |
943 | /* |
944 | * Sending | |
945 | */ | |
946 | ||
4c0a6cb0 | 947 | static int udp_v6_push_pending_frames(struct sock *sk) |
1da177e4 LT |
948 | { |
949 | struct sk_buff *skb; | |
950 | struct udphdr *uh; | |
4c0a6cb0 | 951 | struct udp_sock *up = udp_sk(sk); |
1da177e4 | 952 | struct inet_sock *inet = inet_sk(sk); |
07243c3d | 953 | struct flowi6 *fl6; |
1da177e4 | 954 | int err = 0; |
b2bf1e26 | 955 | int is_udplite = IS_UDPLITE(sk); |
868c86bc | 956 | __wsum csum = 0; |
1da177e4 | 957 | |
07243c3d HFS |
958 | if (up->pending == AF_INET) |
959 | return udp_push_pending_frames(sk); | |
960 | ||
961 | fl6 = &inet->cork.fl.u.ip6; | |
962 | ||
1da177e4 LT |
963 | /* Grab the skbuff where UDP header space exists. */ |
964 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) | |
965 | goto out; | |
966 | ||
967 | /* | |
968 | * Create a UDP header | |
969 | */ | |
4bedb452 | 970 | uh = udp_hdr(skb); |
1958b856 DM |
971 | uh->source = fl6->fl6_sport; |
972 | uh->dest = fl6->fl6_dport; | |
1da177e4 LT |
973 | uh->len = htons(up->len); |
974 | uh->check = 0; | |
975 | ||
b2bf1e26 | 976 | if (is_udplite) |
ba4e58ec | 977 | csum = udplite_csum_outgoing(sk, skb); |
493c6be3 | 978 | else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */ |
4c9483b2 | 979 | udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr, |
493c6be3 SS |
980 | up->len); |
981 | goto send; | |
982 | } else | |
ba4e58ec | 983 | csum = udp_csum_outgoing(sk, skb); |
1da177e4 | 984 | |
ba4e58ec | 985 | /* add protocol-dependent pseudo-header */ |
4c9483b2 DM |
986 | uh->check = csum_ipv6_magic(&fl6->saddr, &fl6->daddr, |
987 | up->len, fl6->flowi6_proto, csum); | |
1da177e4 | 988 | if (uh->check == 0) |
f6ab0288 | 989 | uh->check = CSUM_MANGLED_0; |
1da177e4 | 990 | |
493c6be3 | 991 | send: |
1da177e4 | 992 | err = ip6_push_pending_frames(sk); |
6ce9e7b5 ED |
993 | if (err) { |
994 | if (err == -ENOBUFS && !inet6_sk(sk)->recverr) { | |
995 | UDP6_INC_STATS_USER(sock_net(sk), | |
996 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
997 | err = 0; | |
998 | } | |
999 | } else | |
1000 | UDP6_INC_STATS_USER(sock_net(sk), | |
1001 | UDP_MIB_OUTDATAGRAMS, is_udplite); | |
1da177e4 LT |
1002 | out: |
1003 | up->len = 0; | |
1004 | up->pending = 0; | |
1005 | return err; | |
1006 | } | |
1007 | ||
ba4e58ec | 1008 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
1da177e4 LT |
1009 | struct msghdr *msg, size_t len) |
1010 | { | |
1011 | struct ipv6_txoptions opt_space; | |
1012 | struct udp_sock *up = udp_sk(sk); | |
1013 | struct inet_sock *inet = inet_sk(sk); | |
1014 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1015 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; | |
20c59de2 | 1016 | struct in6_addr *daddr, *final_p, final; |
1da177e4 LT |
1017 | struct ipv6_txoptions *opt = NULL; |
1018 | struct ip6_flowlabel *flowlabel = NULL; | |
4c9483b2 | 1019 | struct flowi6 fl6; |
1da177e4 LT |
1020 | struct dst_entry *dst; |
1021 | int addr_len = msg->msg_namelen; | |
1022 | int ulen = len; | |
1023 | int hlimit = -1; | |
41a1f8ea | 1024 | int tclass = -1; |
13b52cd4 | 1025 | int dontfrag = -1; |
1da177e4 LT |
1026 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
1027 | int err; | |
987905de | 1028 | int connected = 0; |
b2bf1e26 | 1029 | int is_udplite = IS_UDPLITE(sk); |
ba4e58ec | 1030 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
1da177e4 LT |
1031 | |
1032 | /* destination address check */ | |
1033 | if (sin6) { | |
1034 | if (addr_len < offsetof(struct sockaddr, sa_data)) | |
1035 | return -EINVAL; | |
1036 | ||
1037 | switch (sin6->sin6_family) { | |
1038 | case AF_INET6: | |
1039 | if (addr_len < SIN6_LEN_RFC2133) | |
1040 | return -EINVAL; | |
1041 | daddr = &sin6->sin6_addr; | |
1042 | break; | |
1043 | case AF_INET: | |
1044 | goto do_udp_sendmsg; | |
1045 | case AF_UNSPEC: | |
1046 | msg->msg_name = sin6 = NULL; | |
1047 | msg->msg_namelen = addr_len = 0; | |
1048 | daddr = NULL; | |
1049 | break; | |
1050 | default: | |
1051 | return -EINVAL; | |
1052 | } | |
1053 | } else if (!up->pending) { | |
1054 | if (sk->sk_state != TCP_ESTABLISHED) | |
1055 | return -EDESTADDRREQ; | |
1056 | daddr = &np->daddr; | |
1ab1457c | 1057 | } else |
1da177e4 LT |
1058 | daddr = NULL; |
1059 | ||
1060 | if (daddr) { | |
e773e4fa | 1061 | if (ipv6_addr_v4mapped(daddr)) { |
1da177e4 LT |
1062 | struct sockaddr_in sin; |
1063 | sin.sin_family = AF_INET; | |
c720c7e8 | 1064 | sin.sin_port = sin6 ? sin6->sin6_port : inet->inet_dport; |
1da177e4 LT |
1065 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
1066 | msg->msg_name = &sin; | |
1067 | msg->msg_namelen = sizeof(sin); | |
1068 | do_udp_sendmsg: | |
1069 | if (__ipv6_only_sock(sk)) | |
1070 | return -ENETUNREACH; | |
1071 | return udp_sendmsg(iocb, sk, msg, len); | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | if (up->pending == AF_INET) | |
1076 | return udp_sendmsg(iocb, sk, msg, len); | |
1077 | ||
1078 | /* Rough check on arithmetic overflow, | |
b59e139b | 1079 | better check is made in ip6_append_data(). |
1da177e4 LT |
1080 | */ |
1081 | if (len > INT_MAX - sizeof(struct udphdr)) | |
1082 | return -EMSGSIZE; | |
1ab1457c | 1083 | |
1da177e4 LT |
1084 | if (up->pending) { |
1085 | /* | |
1086 | * There are pending frames. | |
1087 | * The socket lock must be held while it's corked. | |
1088 | */ | |
1089 | lock_sock(sk); | |
1090 | if (likely(up->pending)) { | |
1091 | if (unlikely(up->pending != AF_INET6)) { | |
1092 | release_sock(sk); | |
1093 | return -EAFNOSUPPORT; | |
1094 | } | |
1095 | dst = NULL; | |
1096 | goto do_append_data; | |
1097 | } | |
1098 | release_sock(sk); | |
1099 | } | |
1100 | ulen += sizeof(struct udphdr); | |
1101 | ||
4c9483b2 | 1102 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 LT |
1103 | |
1104 | if (sin6) { | |
1105 | if (sin6->sin6_port == 0) | |
1106 | return -EINVAL; | |
1107 | ||
1958b856 | 1108 | fl6.fl6_dport = sin6->sin6_port; |
1da177e4 LT |
1109 | daddr = &sin6->sin6_addr; |
1110 | ||
1111 | if (np->sndflow) { | |
4c9483b2 DM |
1112 | fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
1113 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { | |
1114 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1115 | if (flowlabel == NULL) |
1116 | return -EINVAL; | |
1117 | daddr = &flowlabel->dst; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | * Otherwise it will be difficult to maintain | |
1123 | * sk->sk_dst_cache. | |
1124 | */ | |
1125 | if (sk->sk_state == TCP_ESTABLISHED && | |
1126 | ipv6_addr_equal(daddr, &np->daddr)) | |
1127 | daddr = &np->daddr; | |
1128 | ||
1129 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
1130 | sin6->sin6_scope_id && | |
842df073 | 1131 | __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr))) |
4c9483b2 | 1132 | fl6.flowi6_oif = sin6->sin6_scope_id; |
1da177e4 LT |
1133 | } else { |
1134 | if (sk->sk_state != TCP_ESTABLISHED) | |
1135 | return -EDESTADDRREQ; | |
1136 | ||
1958b856 | 1137 | fl6.fl6_dport = inet->inet_dport; |
1da177e4 | 1138 | daddr = &np->daddr; |
4c9483b2 | 1139 | fl6.flowlabel = np->flow_label; |
987905de | 1140 | connected = 1; |
1da177e4 LT |
1141 | } |
1142 | ||
4c9483b2 DM |
1143 | if (!fl6.flowi6_oif) |
1144 | fl6.flowi6_oif = sk->sk_bound_dev_if; | |
1da177e4 | 1145 | |
4c9483b2 DM |
1146 | if (!fl6.flowi6_oif) |
1147 | fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; | |
9f690db7 | 1148 | |
4c9483b2 | 1149 | fl6.flowi6_mark = sk->sk_mark; |
6fa3eb70 | 1150 | fl6.flowi6_uid = sock_i_uid(sk); |
51953d5b | 1151 | |
1da177e4 LT |
1152 | if (msg->msg_controllen) { |
1153 | opt = &opt_space; | |
1154 | memset(opt, 0, sizeof(struct ipv6_txoptions)); | |
1155 | opt->tot_len = sizeof(*opt); | |
1156 | ||
73df66f8 TP |
1157 | err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, opt, |
1158 | &hlimit, &tclass, &dontfrag); | |
1da177e4 LT |
1159 | if (err < 0) { |
1160 | fl6_sock_release(flowlabel); | |
1161 | return err; | |
1162 | } | |
4c9483b2 DM |
1163 | if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
1164 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); | |
1da177e4 LT |
1165 | if (flowlabel == NULL) |
1166 | return -EINVAL; | |
1167 | } | |
1168 | if (!(opt->opt_nflen|opt->opt_flen)) | |
1169 | opt = NULL; | |
987905de | 1170 | connected = 0; |
1da177e4 LT |
1171 | } |
1172 | if (opt == NULL) | |
1173 | opt = np->opt; | |
df9890c3 YH |
1174 | if (flowlabel) |
1175 | opt = fl6_merge_options(&opt_space, flowlabel, opt); | |
1176 | opt = ipv6_fixup_options(&opt_space, opt); | |
1da177e4 | 1177 | |
4c9483b2 | 1178 | fl6.flowi6_proto = sk->sk_protocol; |
876c7f41 | 1179 | if (!ipv6_addr_any(daddr)) |
4e3fd7a0 | 1180 | fl6.daddr = *daddr; |
876c7f41 | 1181 | else |
4c9483b2 DM |
1182 | fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */ |
1183 | if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr)) | |
4e3fd7a0 | 1184 | fl6.saddr = np->saddr; |
1958b856 | 1185 | fl6.fl6_sport = inet->inet_sport; |
1ab1457c | 1186 | |
4c9483b2 | 1187 | final_p = fl6_update_dst(&fl6, opt, &final); |
20c59de2 | 1188 | if (final_p) |
987905de | 1189 | connected = 0; |
1da177e4 | 1190 | |
4c9483b2 DM |
1191 | if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { |
1192 | fl6.flowi6_oif = np->mcast_oif; | |
987905de | 1193 | connected = 0; |
c4062dfc EH |
1194 | } else if (!fl6.flowi6_oif) |
1195 | fl6.flowi6_oif = np->ucast_oif; | |
1da177e4 | 1196 | |
4c9483b2 | 1197 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
beb8d13b | 1198 | |
4c9483b2 | 1199 | dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, true); |
68d0c6d3 DM |
1200 | if (IS_ERR(dst)) { |
1201 | err = PTR_ERR(dst); | |
1202 | dst = NULL; | |
1da177e4 | 1203 | goto out; |
14e50e57 | 1204 | } |
1da177e4 LT |
1205 | |
1206 | if (hlimit < 0) { | |
4c9483b2 | 1207 | if (ipv6_addr_is_multicast(&fl6.daddr)) |
1da177e4 LT |
1208 | hlimit = np->mcast_hops; |
1209 | else | |
1210 | hlimit = np->hop_limit; | |
1211 | if (hlimit < 0) | |
6b75d090 | 1212 | hlimit = ip6_dst_hoplimit(dst); |
1da177e4 LT |
1213 | } |
1214 | ||
e651f03a | 1215 | if (tclass < 0) |
41a1f8ea | 1216 | tclass = np->tclass; |
41a1f8ea | 1217 | |
13b52cd4 BH |
1218 | if (dontfrag < 0) |
1219 | dontfrag = np->dontfrag; | |
1220 | ||
1da177e4 LT |
1221 | if (msg->msg_flags&MSG_CONFIRM) |
1222 | goto do_confirm; | |
1223 | back_from_confirm: | |
1224 | ||
1225 | lock_sock(sk); | |
1226 | if (unlikely(up->pending)) { | |
1227 | /* The socket is already corked while preparing it. */ | |
1228 | /* ... which is an evident application bug. --ANK */ | |
1229 | release_sock(sk); | |
1230 | ||
64ce2073 | 1231 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
1da177e4 LT |
1232 | err = -EINVAL; |
1233 | goto out; | |
1234 | } | |
1235 | ||
1236 | up->pending = AF_INET6; | |
1237 | ||
1238 | do_append_data: | |
1239 | up->len += ulen; | |
ba4e58ec GR |
1240 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
1241 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, | |
4c9483b2 | 1242 | sizeof(struct udphdr), hlimit, tclass, opt, &fl6, |
41a1f8ea | 1243 | (struct rt6_info*)dst, |
13b52cd4 | 1244 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags, dontfrag); |
1da177e4 LT |
1245 | if (err) |
1246 | udp_v6_flush_pending_frames(sk); | |
1247 | else if (!corkreq) | |
4c0a6cb0 | 1248 | err = udp_v6_push_pending_frames(sk); |
1e0c14f4 HX |
1249 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
1250 | up->pending = 0; | |
1da177e4 | 1251 | |
a5e7c210 DM |
1252 | if (dst) { |
1253 | if (connected) { | |
1254 | ip6_dst_store(sk, dst, | |
4c9483b2 | 1255 | ipv6_addr_equal(&fl6.daddr, &np->daddr) ? |
8e1ef0a9 YH |
1256 | &np->daddr : NULL, |
1257 | #ifdef CONFIG_IPV6_SUBTREES | |
4c9483b2 | 1258 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
8e1ef0a9 YH |
1259 | &np->saddr : |
1260 | #endif | |
1261 | NULL); | |
a5e7c210 DM |
1262 | } else { |
1263 | dst_release(dst); | |
1264 | } | |
a3c96089 | 1265 | dst = NULL; |
a5e7c210 DM |
1266 | } |
1267 | ||
1da177e4 LT |
1268 | if (err > 0) |
1269 | err = np->recverr ? net_xmit_errno(err) : 0; | |
1270 | release_sock(sk); | |
1271 | out: | |
a3c96089 | 1272 | dst_release(dst); |
1da177e4 | 1273 | fl6_sock_release(flowlabel); |
cd562c98 | 1274 | if (!err) |
1da177e4 | 1275 | return len; |
a18135eb DM |
1276 | /* |
1277 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting | |
1278 | * ENOBUFS might not be good (it's not tunable per se), but otherwise | |
1279 | * we don't have a good statistic (IpOutDiscards but it can be too many | |
1280 | * things). We could add another new stat but at least for now that | |
1281 | * seems like overkill. | |
1282 | */ | |
6fa3eb70 S |
1283 | /* MTK_NET */ |
1284 | if (err == -ENOBUFS || (sk->sk_socket && test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) ) { | |
235b9f7a PE |
1285 | UDP6_INC_STATS_USER(sock_net(sk), |
1286 | UDP_MIB_SNDBUFERRORS, is_udplite); | |
a18135eb | 1287 | } |
1da177e4 LT |
1288 | return err; |
1289 | ||
1290 | do_confirm: | |
1291 | dst_confirm(dst); | |
1292 | if (!(msg->msg_flags&MSG_PROBE) || len) | |
1293 | goto back_from_confirm; | |
1294 | err = 0; | |
1295 | goto out; | |
1296 | } | |
1297 | ||
7d06b2e0 | 1298 | void udpv6_destroy_sock(struct sock *sk) |
1da177e4 | 1299 | { |
44046a59 | 1300 | struct udp_sock *up = udp_sk(sk); |
1da177e4 LT |
1301 | lock_sock(sk); |
1302 | udp_v6_flush_pending_frames(sk); | |
1303 | release_sock(sk); | |
1304 | ||
44046a59 TP |
1305 | if (static_key_false(&udpv6_encap_needed) && up->encap_type) { |
1306 | void (*encap_destroy)(struct sock *sk); | |
1307 | encap_destroy = ACCESS_ONCE(up->encap_destroy); | |
1308 | if (encap_destroy) | |
1309 | encap_destroy(sk); | |
1310 | } | |
1311 | ||
1da177e4 | 1312 | inet6_destroy_sock(sk); |
1da177e4 LT |
1313 | } |
1314 | ||
1315 | /* | |
1316 | * Socket option code for UDP | |
1317 | */ | |
ba4e58ec | 1318 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1319 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1320 | { |
db8dac20 | 1321 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1322 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1323 | udp_v6_push_pending_frames); | |
ba4e58ec | 1324 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1325 | } |
1326 | ||
1327 | #ifdef CONFIG_COMPAT | |
ba4e58ec | 1328 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
b7058842 | 1329 | char __user *optval, unsigned int optlen) |
3fdadf7d | 1330 | { |
db8dac20 | 1331 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 GR |
1332 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
1333 | udp_v6_push_pending_frames); | |
ba4e58ec | 1334 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1335 | } |
1336 | #endif | |
1337 | ||
ba4e58ec GR |
1338 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
1339 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1340 | { |
db8dac20 | 1341 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1342 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1343 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1344 | } |
1345 | ||
1346 | #ifdef CONFIG_COMPAT | |
ba4e58ec GR |
1347 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
1348 | char __user *optval, int __user *optlen) | |
3fdadf7d | 1349 | { |
db8dac20 | 1350 | if (level == SOL_UDP || level == SOL_UDPLITE) |
4c0a6cb0 | 1351 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
ba4e58ec | 1352 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
3fdadf7d DM |
1353 | } |
1354 | #endif | |
1355 | ||
41135cc8 | 1356 | static const struct inet6_protocol udpv6_protocol = { |
1da177e4 LT |
1357 | .handler = udpv6_rcv, |
1358 | .err_handler = udpv6_err, | |
1359 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, | |
1360 | }; | |
1361 | ||
1362 | /* ------------------------------------------------------------------------ */ | |
1363 | #ifdef CONFIG_PROC_FS | |
1364 | ||
1365 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) | |
1366 | { | |
1367 | struct inet_sock *inet = inet_sk(sp); | |
1368 | struct ipv6_pinfo *np = inet6_sk(sp); | |
b71d1d42 | 1369 | const struct in6_addr *dest, *src; |
1da177e4 LT |
1370 | __u16 destp, srcp; |
1371 | ||
1372 | dest = &np->daddr; | |
1373 | src = &np->rcv_saddr; | |
c720c7e8 ED |
1374 | destp = ntohs(inet->inet_dport); |
1375 | srcp = ntohs(inet->inet_sport); | |
1da177e4 | 1376 | seq_printf(seq, |
f86dcc5a | 1377 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
71338aa7 | 1378 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %d\n", |
1da177e4 LT |
1379 | bucket, |
1380 | src->s6_addr32[0], src->s6_addr32[1], | |
1381 | src->s6_addr32[2], src->s6_addr32[3], srcp, | |
1382 | dest->s6_addr32[0], dest->s6_addr32[1], | |
1383 | dest->s6_addr32[2], dest->s6_addr32[3], destp, | |
1ab1457c | 1384 | sp->sk_state, |
31e6d363 ED |
1385 | sk_wmem_alloc_get(sp), |
1386 | sk_rmem_alloc_get(sp), | |
1da177e4 | 1387 | 0, 0L, 0, |
a7cb5a49 EB |
1388 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), |
1389 | 0, | |
1da177e4 | 1390 | sock_i_ino(sp), |
cb61cb9b ED |
1391 | atomic_read(&sp->sk_refcnt), sp, |
1392 | atomic_read(&sp->sk_drops)); | |
1da177e4 LT |
1393 | } |
1394 | ||
ba4e58ec | 1395 | int udp6_seq_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1396 | { |
1397 | if (v == SEQ_START_TOKEN) | |
1398 | seq_printf(seq, | |
1399 | " sl " | |
1400 | "local_address " | |
1401 | "remote_address " | |
1402 | "st tx_queue rx_queue tr tm->when retrnsmt" | |
cb61cb9b | 1403 | " uid timeout inode ref pointer drops\n"); |
1da177e4 LT |
1404 | else |
1405 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); | |
1406 | return 0; | |
1407 | } | |
1408 | ||
73cb88ec AV |
1409 | static const struct file_operations udp6_afinfo_seq_fops = { |
1410 | .owner = THIS_MODULE, | |
1411 | .open = udp_seq_open, | |
1412 | .read = seq_read, | |
1413 | .llseek = seq_lseek, | |
1414 | .release = seq_release_net | |
1415 | }; | |
1416 | ||
1da177e4 | 1417 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
1da177e4 LT |
1418 | .name = "udp6", |
1419 | .family = AF_INET6, | |
645ca708 | 1420 | .udp_table = &udp_table, |
73cb88ec | 1421 | .seq_fops = &udp6_afinfo_seq_fops, |
dda61925 DL |
1422 | .seq_ops = { |
1423 | .show = udp6_seq_show, | |
1424 | }, | |
1da177e4 LT |
1425 | }; |
1426 | ||
2c8c1e72 | 1427 | int __net_init udp6_proc_init(struct net *net) |
1da177e4 | 1428 | { |
0c96d8c5 | 1429 | return udp_proc_register(net, &udp6_seq_afinfo); |
1da177e4 LT |
1430 | } |
1431 | ||
0c96d8c5 DL |
1432 | void udp6_proc_exit(struct net *net) { |
1433 | udp_proc_unregister(net, &udp6_seq_afinfo); | |
1da177e4 LT |
1434 | } |
1435 | #endif /* CONFIG_PROC_FS */ | |
1436 | ||
f77d6021 ED |
1437 | void udp_v6_clear_sk(struct sock *sk, int size) |
1438 | { | |
1439 | struct inet_sock *inet = inet_sk(sk); | |
1440 | ||
1441 | /* we do not want to clear pinet6 field, because of RCU lookups */ | |
1442 | sk_prot_clear_portaddr_nulls(sk, offsetof(struct inet_sock, pinet6)); | |
1443 | ||
1444 | size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6); | |
1445 | memset(&inet->pinet6 + 1, 0, size); | |
1446 | } | |
1447 | ||
1da177e4 LT |
1448 | /* ------------------------------------------------------------------------ */ |
1449 | ||
1450 | struct proto udpv6_prot = { | |
543d9cfe ACM |
1451 | .name = "UDPv6", |
1452 | .owner = THIS_MODULE, | |
ba4e58ec | 1453 | .close = udp_lib_close, |
543d9cfe ACM |
1454 | .connect = ip6_datagram_connect, |
1455 | .disconnect = udp_disconnect, | |
1456 | .ioctl = udp_ioctl, | |
1457 | .destroy = udpv6_destroy_sock, | |
1458 | .setsockopt = udpv6_setsockopt, | |
1459 | .getsockopt = udpv6_getsockopt, | |
1460 | .sendmsg = udpv6_sendmsg, | |
1461 | .recvmsg = udpv6_recvmsg, | |
f7ad74fe | 1462 | .backlog_rcv = __udpv6_queue_rcv_skb, |
ba4e58ec GR |
1463 | .hash = udp_lib_hash, |
1464 | .unhash = udp_lib_unhash, | |
719f8358 | 1465 | .rehash = udp_v6_rehash, |
543d9cfe | 1466 | .get_port = udp_v6_get_port, |
95766fff HA |
1467 | .memory_allocated = &udp_memory_allocated, |
1468 | .sysctl_mem = sysctl_udp_mem, | |
1469 | .sysctl_wmem = &sysctl_udp_wmem_min, | |
1470 | .sysctl_rmem = &sysctl_udp_rmem_min, | |
543d9cfe | 1471 | .obj_size = sizeof(struct udp6_sock), |
271b72c7 | 1472 | .slab_flags = SLAB_DESTROY_BY_RCU, |
645ca708 | 1473 | .h.udp_table = &udp_table, |
3fdadf7d | 1474 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1475 | .compat_setsockopt = compat_udpv6_setsockopt, |
1476 | .compat_getsockopt = compat_udpv6_getsockopt, | |
3fdadf7d | 1477 | #endif |
f77d6021 | 1478 | .clear_sk = udp_v6_clear_sk, |
1da177e4 LT |
1479 | }; |
1480 | ||
1da177e4 LT |
1481 | static struct inet_protosw udpv6_protosw = { |
1482 | .type = SOCK_DGRAM, | |
1483 | .protocol = IPPROTO_UDP, | |
1484 | .prot = &udpv6_prot, | |
1485 | .ops = &inet6_dgram_ops, | |
1da177e4 LT |
1486 | .no_check = UDP_CSUM_DEFAULT, |
1487 | .flags = INET_PROTOSW_PERMANENT, | |
1488 | }; | |
1489 | ||
1490 | ||
7f4e4868 | 1491 | int __init udpv6_init(void) |
1da177e4 | 1492 | { |
7f4e4868 DL |
1493 | int ret; |
1494 | ||
3336288a VY |
1495 | ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP); |
1496 | if (ret) | |
c6b641a4 | 1497 | goto out; |
3336288a | 1498 | |
7f4e4868 DL |
1499 | ret = inet6_register_protosw(&udpv6_protosw); |
1500 | if (ret) | |
1501 | goto out_udpv6_protocol; | |
1502 | out: | |
1503 | return ret; | |
1504 | ||
1505 | out_udpv6_protocol: | |
1506 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1507 | goto out; | |
1508 | } | |
1509 | ||
09f7709f | 1510 | void udpv6_exit(void) |
7f4e4868 DL |
1511 | { |
1512 | inet6_unregister_protosw(&udpv6_protosw); | |
1513 | inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP); | |
1da177e4 | 1514 | } |