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1 | /* |
2 | * TCP over IPv6 |
3 | * Linux INET6 implementation |
4 | * |
5 | * Authors: |
6 | * Pedro Roque <roque@di.fc.ul.pt> |
7 | * |
8 | * Based on: |
9 | * linux/net/ipv4/tcp.c |
10 | * linux/net/ipv4/tcp_input.c |
11 | * linux/net/ipv4/tcp_output.c |
12 | * |
13 | * Fixes: |
14 | * Hideaki YOSHIFUJI : sin6_scope_id support |
15 | * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which |
16 | * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind |
17 | * a single port at the same time. |
18 | * YOSHIFUJI Hideaki @USAGI: convert /proc/net/tcp6 to seq_file. |
19 | * |
20 | * This program is free software; you can redistribute it and/or |
21 | * modify it under the terms of the GNU General Public License |
22 | * as published by the Free Software Foundation; either version |
23 | * 2 of the License, or (at your option) any later version. |
24 | */ |
25 | |
26 | #include <linux/bottom_half.h> |
27 | #include <linux/module.h> |
28 | #include <linux/errno.h> |
29 | #include <linux/types.h> |
30 | #include <linux/socket.h> |
31 | #include <linux/sockios.h> |
32 | #include <linux/net.h> |
33 | #include <linux/jiffies.h> |
34 | #include <linux/in.h> |
35 | #include <linux/in6.h> |
36 | #include <linux/netdevice.h> |
37 | #include <linux/init.h> |
38 | #include <linux/jhash.h> |
39 | #include <linux/ipsec.h> |
40 | #include <linux/times.h> |
41 | |
42 | #include <linux/ipv6.h> |
43 | #include <linux/icmpv6.h> |
44 | #include <linux/random.h> |
45 | |
46 | #include <net/tcp.h> |
47 | #include <net/ndisc.h> |
48 | #include <net/inet6_hashtables.h> |
49 | #include <net/inet6_connection_sock.h> |
50 | #include <net/ipv6.h> |
51 | #include <net/transp_v6.h> |
52 | #include <net/addrconf.h> |
53 | #include <net/ip6_route.h> |
54 | #include <net/ip6_checksum.h> |
55 | #include <net/inet_ecn.h> |
56 | #include <net/protocol.h> |
57 | #include <net/xfrm.h> |
58 | #include <net/snmp.h> |
59 | #include <net/dsfield.h> |
60 | #include <net/timewait_sock.h> |
61 | #include <net/netdma.h> |
62 | #include <net/inet_common.h> |
63 | |
64 | #include <asm/uaccess.h> |
65 | |
66 | #include <linux/proc_fs.h> |
67 | #include <linux/seq_file.h> |
68 | |
69 | #include <linux/crypto.h> |
70 | #include <linux/scatterlist.h> |
71 | |
72 | static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb); |
73 | static void tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb, |
74 | struct request_sock *req); |
75 | |
76 | static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb); |
77 | |
78 | static const struct inet_connection_sock_af_ops ipv6_mapped; |
79 | static const struct inet_connection_sock_af_ops ipv6_specific; |
80 | #ifdef CONFIG_TCP_MD5SIG |
81 | static const struct tcp_sock_af_ops tcp_sock_ipv6_specific; |
82 | static const struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific; |
83 | #else |
84 | static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(struct sock *sk, |
85 | struct in6_addr *addr) |
86 | { |
87 | return NULL; |
88 | } |
89 | #endif |
90 | |
91 | static void tcp_v6_hash(struct sock *sk) |
92 | { |
93 | if (sk->sk_state != TCP_CLOSE) { |
94 | if (inet_csk(sk)->icsk_af_ops == &ipv6_mapped) { |
95 | tcp_prot.hash(sk); |
96 | return; |
97 | } |
98 | local_bh_disable(); |
99 | __inet6_hash(sk); |
100 | local_bh_enable(); |
101 | } |
102 | } |
103 | |
104 | static __inline__ __sum16 tcp_v6_check(int len, |
105 | struct in6_addr *saddr, |
106 | struct in6_addr *daddr, |
107 | __wsum base) |
108 | { |
109 | return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base); |
110 | } |
111 | |
112 | static __u32 tcp_v6_init_sequence(struct sk_buff *skb) |
113 | { |
114 | return secure_tcpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32, |
115 | ipv6_hdr(skb)->saddr.s6_addr32, |
116 | tcp_hdr(skb)->dest, |
117 | tcp_hdr(skb)->source); |
118 | } |
119 | |
120 | static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr, |
121 | int addr_len) |
122 | { |
123 | struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr; |
124 | struct inet_sock *inet = inet_sk(sk); |
125 | struct inet_connection_sock *icsk = inet_csk(sk); |
126 | struct ipv6_pinfo *np = inet6_sk(sk); |
127 | struct tcp_sock *tp = tcp_sk(sk); |
128 | struct in6_addr *saddr = NULL, *final_p = NULL, final; |
129 | struct flowi fl; |
130 | struct dst_entry *dst; |
131 | int addr_type; |
132 | int err; |
133 | |
134 | if (addr_len < SIN6_LEN_RFC2133) |
135 | return -EINVAL; |
136 | |
137 | if (usin->sin6_family != AF_INET6) |
138 | return(-EAFNOSUPPORT); |
139 | |
140 | memset(&fl, 0, sizeof(fl)); |
141 | |
142 | if (np->sndflow) { |
143 | fl.fl6_flowlabel = usin->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
144 | IP6_ECN_flow_init(fl.fl6_flowlabel); |
145 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { |
146 | struct ip6_flowlabel *flowlabel; |
147 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); |
148 | if (flowlabel == NULL) |
149 | return -EINVAL; |
150 | ipv6_addr_copy(&usin->sin6_addr, &flowlabel->dst); |
151 | fl6_sock_release(flowlabel); |
152 | } |
153 | } |
154 | |
155 | /* |
156 | * connect() to INADDR_ANY means loopback (BSD'ism). |
157 | */ |
158 | |
159 | if(ipv6_addr_any(&usin->sin6_addr)) |
160 | usin->sin6_addr.s6_addr[15] = 0x1; |
161 | |
162 | addr_type = ipv6_addr_type(&usin->sin6_addr); |
163 | |
164 | if(addr_type & IPV6_ADDR_MULTICAST) |
165 | return -ENETUNREACH; |
166 | |
167 | if (addr_type&IPV6_ADDR_LINKLOCAL) { |
168 | if (addr_len >= sizeof(struct sockaddr_in6) && |
169 | usin->sin6_scope_id) { |
170 | /* If interface is set while binding, indices |
171 | * must coincide. |
172 | */ |
173 | if (sk->sk_bound_dev_if && |
174 | sk->sk_bound_dev_if != usin->sin6_scope_id) |
175 | return -EINVAL; |
176 | |
177 | sk->sk_bound_dev_if = usin->sin6_scope_id; |
178 | } |
179 | |
180 | /* Connect to link-local address requires an interface */ |
181 | if (!sk->sk_bound_dev_if) |
182 | return -EINVAL; |
183 | } |
184 | |
185 | if (tp->rx_opt.ts_recent_stamp && |
186 | !ipv6_addr_equal(&np->daddr, &usin->sin6_addr)) { |
187 | tp->rx_opt.ts_recent = 0; |
188 | tp->rx_opt.ts_recent_stamp = 0; |
189 | tp->write_seq = 0; |
190 | } |
191 | |
192 | ipv6_addr_copy(&np->daddr, &usin->sin6_addr); |
193 | np->flow_label = fl.fl6_flowlabel; |
194 | |
195 | /* |
196 | * TCP over IPv4 |
197 | */ |
198 | |
199 | if (addr_type == IPV6_ADDR_MAPPED) { |
200 | u32 exthdrlen = icsk->icsk_ext_hdr_len; |
201 | struct sockaddr_in sin; |
202 | |
203 | SOCK_DEBUG(sk, "connect: ipv4 mapped\n"); |
204 | |
205 | if (__ipv6_only_sock(sk)) |
206 | return -ENETUNREACH; |
207 | |
208 | sin.sin_family = AF_INET; |
209 | sin.sin_port = usin->sin6_port; |
210 | sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3]; |
211 | |
212 | icsk->icsk_af_ops = &ipv6_mapped; |
213 | sk->sk_backlog_rcv = tcp_v4_do_rcv; |
214 | #ifdef CONFIG_TCP_MD5SIG |
215 | tp->af_specific = &tcp_sock_ipv6_mapped_specific; |
216 | #endif |
217 | |
218 | err = tcp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin)); |
219 | |
220 | if (err) { |
221 | icsk->icsk_ext_hdr_len = exthdrlen; |
222 | icsk->icsk_af_ops = &ipv6_specific; |
223 | sk->sk_backlog_rcv = tcp_v6_do_rcv; |
224 | #ifdef CONFIG_TCP_MD5SIG |
225 | tp->af_specific = &tcp_sock_ipv6_specific; |
226 | #endif |
227 | goto failure; |
228 | } else { |
229 | ipv6_addr_set(&np->saddr, 0, 0, htonl(0x0000FFFF), |
230 | inet->saddr); |
231 | ipv6_addr_set(&np->rcv_saddr, 0, 0, htonl(0x0000FFFF), |
232 | inet->rcv_saddr); |
233 | } |
234 | |
235 | return err; |
236 | } |
237 | |
238 | if (!ipv6_addr_any(&np->rcv_saddr)) |
239 | saddr = &np->rcv_saddr; |
240 | |
241 | fl.proto = IPPROTO_TCP; |
242 | ipv6_addr_copy(&fl.fl6_dst, &np->daddr); |
243 | ipv6_addr_copy(&fl.fl6_src, |
244 | (saddr ? saddr : &np->saddr)); |
245 | fl.oif = sk->sk_bound_dev_if; |
246 | fl.fl_ip_dport = usin->sin6_port; |
247 | fl.fl_ip_sport = inet->sport; |
248 | |
249 | if (np->opt && np->opt->srcrt) { |
250 | struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt; |
251 | ipv6_addr_copy(&final, &fl.fl6_dst); |
252 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); |
253 | final_p = &final; |
254 | } |
255 | |
256 | security_sk_classify_flow(sk, &fl); |
257 | |
258 | err = ip6_dst_lookup(sk, &dst, &fl); |
259 | if (err) |
260 | goto failure; |
261 | if (final_p) |
262 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
263 | |
264 | err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT); |
265 | if (err < 0) { |
266 | if (err == -EREMOTE) |
267 | err = ip6_dst_blackhole(sk, &dst, &fl); |
268 | if (err < 0) |
269 | goto failure; |
270 | } |
271 | |
272 | if (saddr == NULL) { |
273 | saddr = &fl.fl6_src; |
274 | ipv6_addr_copy(&np->rcv_saddr, saddr); |
275 | } |
276 | |
277 | /* set the source address */ |
278 | ipv6_addr_copy(&np->saddr, saddr); |
279 | inet->rcv_saddr = LOOPBACK4_IPV6; |
280 | |
281 | sk->sk_gso_type = SKB_GSO_TCPV6; |
282 | __ip6_dst_store(sk, dst, NULL, NULL); |
283 | |
284 | icsk->icsk_ext_hdr_len = 0; |
285 | if (np->opt) |
286 | icsk->icsk_ext_hdr_len = (np->opt->opt_flen + |
287 | np->opt->opt_nflen); |
288 | |
289 | tp->rx_opt.mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr); |
290 | |
291 | inet->dport = usin->sin6_port; |
292 | |
293 | tcp_set_state(sk, TCP_SYN_SENT); |
294 | err = inet6_hash_connect(&tcp_death_row, sk); |
295 | if (err) |
296 | goto late_failure; |
297 | |
298 | if (!tp->write_seq) |
299 | tp->write_seq = secure_tcpv6_sequence_number(np->saddr.s6_addr32, |
300 | np->daddr.s6_addr32, |
301 | inet->sport, |
302 | inet->dport); |
303 | |
304 | err = tcp_connect(sk); |
305 | if (err) |
306 | goto late_failure; |
307 | |
308 | return 0; |
309 | |
310 | late_failure: |
311 | tcp_set_state(sk, TCP_CLOSE); |
312 | __sk_dst_reset(sk); |
313 | failure: |
314 | inet->dport = 0; |
315 | sk->sk_route_caps = 0; |
316 | return err; |
317 | } |
318 | |
319 | static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
320 | u8 type, u8 code, int offset, __be32 info) |
321 | { |
322 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; |
323 | const struct tcphdr *th = (struct tcphdr *)(skb->data+offset); |
324 | struct ipv6_pinfo *np; |
325 | struct sock *sk; |
326 | int err; |
327 | struct tcp_sock *tp; |
328 | __u32 seq; |
329 | struct net *net = dev_net(skb->dev); |
330 | |
331 | sk = inet6_lookup(net, &tcp_hashinfo, &hdr->daddr, |
332 | th->dest, &hdr->saddr, th->source, skb->dev->ifindex); |
333 | |
334 | if (sk == NULL) { |
335 | ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), |
336 | ICMP6_MIB_INERRORS); |
337 | return; |
338 | } |
339 | |
340 | if (sk->sk_state == TCP_TIME_WAIT) { |
341 | inet_twsk_put(inet_twsk(sk)); |
342 | return; |
343 | } |
344 | |
345 | bh_lock_sock(sk); |
346 | if (sock_owned_by_user(sk)) |
347 | NET_INC_STATS_BH(net, LINUX_MIB_LOCKDROPPEDICMPS); |
348 | |
349 | if (sk->sk_state == TCP_CLOSE) |
350 | goto out; |
351 | |
352 | tp = tcp_sk(sk); |
353 | seq = ntohl(th->seq); |
354 | if (sk->sk_state != TCP_LISTEN && |
355 | !between(seq, tp->snd_una, tp->snd_nxt)) { |
356 | NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS); |
357 | goto out; |
358 | } |
359 | |
360 | np = inet6_sk(sk); |
361 | |
362 | if (type == ICMPV6_PKT_TOOBIG) { |
363 | struct dst_entry *dst = NULL; |
364 | |
365 | if (sock_owned_by_user(sk)) |
366 | goto out; |
367 | if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) |
368 | goto out; |
369 | |
370 | /* icmp should have updated the destination cache entry */ |
371 | dst = __sk_dst_check(sk, np->dst_cookie); |
372 | |
373 | if (dst == NULL) { |
374 | struct inet_sock *inet = inet_sk(sk); |
375 | struct flowi fl; |
376 | |
377 | /* BUGGG_FUTURE: Again, it is not clear how |
378 | to handle rthdr case. Ignore this complexity |
379 | for now. |
380 | */ |
381 | memset(&fl, 0, sizeof(fl)); |
382 | fl.proto = IPPROTO_TCP; |
383 | ipv6_addr_copy(&fl.fl6_dst, &np->daddr); |
384 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); |
385 | fl.oif = sk->sk_bound_dev_if; |
386 | fl.fl_ip_dport = inet->dport; |
387 | fl.fl_ip_sport = inet->sport; |
388 | security_skb_classify_flow(skb, &fl); |
389 | |
390 | if ((err = ip6_dst_lookup(sk, &dst, &fl))) { |
391 | sk->sk_err_soft = -err; |
392 | goto out; |
393 | } |
394 | |
395 | if ((err = xfrm_lookup(net, &dst, &fl, sk, 0)) < 0) { |
396 | sk->sk_err_soft = -err; |
397 | goto out; |
398 | } |
399 | |
400 | } else |
401 | dst_hold(dst); |
402 | |
403 | if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) { |
404 | tcp_sync_mss(sk, dst_mtu(dst)); |
405 | tcp_simple_retransmit(sk); |
406 | } /* else let the usual retransmit timer handle it */ |
407 | dst_release(dst); |
408 | goto out; |
409 | } |
410 | |
411 | icmpv6_err_convert(type, code, &err); |
412 | |
413 | /* Might be for an request_sock */ |
414 | switch (sk->sk_state) { |
415 | struct request_sock *req, **prev; |
416 | case TCP_LISTEN: |
417 | if (sock_owned_by_user(sk)) |
418 | goto out; |
419 | |
420 | req = inet6_csk_search_req(sk, &prev, th->dest, &hdr->daddr, |
421 | &hdr->saddr, inet6_iif(skb)); |
422 | if (!req) |
423 | goto out; |
424 | |
425 | /* ICMPs are not backlogged, hence we cannot get |
426 | * an established socket here. |
427 | */ |
428 | WARN_ON(req->sk != NULL); |
429 | |
430 | if (seq != tcp_rsk(req)->snt_isn) { |
431 | NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS); |
432 | goto out; |
433 | } |
434 | |
435 | inet_csk_reqsk_queue_drop(sk, req, prev); |
436 | goto out; |
437 | |
438 | case TCP_SYN_SENT: |
439 | case TCP_SYN_RECV: /* Cannot happen. |
440 | It can, it SYNs are crossed. --ANK */ |
441 | if (!sock_owned_by_user(sk)) { |
442 | sk->sk_err = err; |
443 | sk->sk_error_report(sk); /* Wake people up to see the error (see connect in sock.c) */ |
444 | |
445 | tcp_done(sk); |
446 | } else |
447 | sk->sk_err_soft = err; |
448 | goto out; |
449 | } |
450 | |
451 | if (!sock_owned_by_user(sk) && np->recverr) { |
452 | sk->sk_err = err; |
453 | sk->sk_error_report(sk); |
454 | } else |
455 | sk->sk_err_soft = err; |
456 | |
457 | out: |
458 | bh_unlock_sock(sk); |
459 | sock_put(sk); |
460 | } |
461 | |
462 | |
463 | static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req) |
464 | { |
465 | struct inet6_request_sock *treq = inet6_rsk(req); |
466 | struct ipv6_pinfo *np = inet6_sk(sk); |
467 | struct sk_buff * skb; |
468 | struct ipv6_txoptions *opt = NULL; |
469 | struct in6_addr * final_p = NULL, final; |
470 | struct flowi fl; |
471 | struct dst_entry *dst; |
472 | int err = -1; |
473 | |
474 | memset(&fl, 0, sizeof(fl)); |
475 | fl.proto = IPPROTO_TCP; |
476 | ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr); |
477 | ipv6_addr_copy(&fl.fl6_src, &treq->loc_addr); |
478 | fl.fl6_flowlabel = 0; |
479 | fl.oif = treq->iif; |
480 | fl.fl_ip_dport = inet_rsk(req)->rmt_port; |
481 | fl.fl_ip_sport = inet_rsk(req)->loc_port; |
482 | security_req_classify_flow(req, &fl); |
483 | |
484 | opt = np->opt; |
485 | if (opt && opt->srcrt) { |
486 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; |
487 | ipv6_addr_copy(&final, &fl.fl6_dst); |
488 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); |
489 | final_p = &final; |
490 | } |
491 | |
492 | err = ip6_dst_lookup(sk, &dst, &fl); |
493 | if (err) |
494 | goto done; |
495 | if (final_p) |
496 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
497 | if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) |
498 | goto done; |
499 | |
500 | skb = tcp_make_synack(sk, dst, req); |
501 | if (skb) { |
502 | struct tcphdr *th = tcp_hdr(skb); |
503 | |
504 | th->check = tcp_v6_check(skb->len, |
505 | &treq->loc_addr, &treq->rmt_addr, |
506 | csum_partial(th, skb->len, skb->csum)); |
507 | |
508 | ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr); |
509 | err = ip6_xmit(sk, skb, &fl, opt, 0); |
510 | err = net_xmit_eval(err); |
511 | } |
512 | |
513 | done: |
514 | if (opt && opt != np->opt) |
515 | sock_kfree_s(sk, opt, opt->tot_len); |
516 | dst_release(dst); |
517 | return err; |
518 | } |
519 | |
520 | static inline void syn_flood_warning(struct sk_buff *skb) |
521 | { |
522 | #ifdef CONFIG_SYN_COOKIES |
523 | if (sysctl_tcp_syncookies) |
524 | printk(KERN_INFO |
525 | "TCPv6: Possible SYN flooding on port %d. " |
526 | "Sending cookies.\n", ntohs(tcp_hdr(skb)->dest)); |
527 | else |
528 | #endif |
529 | printk(KERN_INFO |
530 | "TCPv6: Possible SYN flooding on port %d. " |
531 | "Dropping request.\n", ntohs(tcp_hdr(skb)->dest)); |
532 | } |
533 | |
534 | static void tcp_v6_reqsk_destructor(struct request_sock *req) |
535 | { |
536 | kfree_skb(inet6_rsk(req)->pktopts); |
537 | } |
538 | |
539 | #ifdef CONFIG_TCP_MD5SIG |
540 | static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(struct sock *sk, |
541 | struct in6_addr *addr) |
542 | { |
543 | struct tcp_sock *tp = tcp_sk(sk); |
544 | int i; |
545 | |
546 | BUG_ON(tp == NULL); |
547 | |
548 | if (!tp->md5sig_info || !tp->md5sig_info->entries6) |
549 | return NULL; |
550 | |
551 | for (i = 0; i < tp->md5sig_info->entries6; i++) { |
552 | if (ipv6_addr_equal(&tp->md5sig_info->keys6[i].addr, addr)) |
553 | return &tp->md5sig_info->keys6[i].base; |
554 | } |
555 | return NULL; |
556 | } |
557 | |
558 | static struct tcp_md5sig_key *tcp_v6_md5_lookup(struct sock *sk, |
559 | struct sock *addr_sk) |
560 | { |
561 | return tcp_v6_md5_do_lookup(sk, &inet6_sk(addr_sk)->daddr); |
562 | } |
563 | |
564 | static struct tcp_md5sig_key *tcp_v6_reqsk_md5_lookup(struct sock *sk, |
565 | struct request_sock *req) |
566 | { |
567 | return tcp_v6_md5_do_lookup(sk, &inet6_rsk(req)->rmt_addr); |
568 | } |
569 | |
570 | static int tcp_v6_md5_do_add(struct sock *sk, struct in6_addr *peer, |
571 | char *newkey, u8 newkeylen) |
572 | { |
573 | /* Add key to the list */ |
574 | struct tcp_md5sig_key *key; |
575 | struct tcp_sock *tp = tcp_sk(sk); |
576 | struct tcp6_md5sig_key *keys; |
577 | |
578 | key = tcp_v6_md5_do_lookup(sk, peer); |
579 | if (key) { |
580 | /* modify existing entry - just update that one */ |
581 | kfree(key->key); |
582 | key->key = newkey; |
583 | key->keylen = newkeylen; |
584 | } else { |
585 | /* reallocate new list if current one is full. */ |
586 | if (!tp->md5sig_info) { |
587 | tp->md5sig_info = kzalloc(sizeof(*tp->md5sig_info), GFP_ATOMIC); |
588 | if (!tp->md5sig_info) { |
589 | kfree(newkey); |
590 | return -ENOMEM; |
591 | } |
592 | sk->sk_route_caps &= ~NETIF_F_GSO_MASK; |
593 | } |
594 | if (tcp_alloc_md5sig_pool(sk) == NULL) { |
595 | kfree(newkey); |
596 | return -ENOMEM; |
597 | } |
598 | if (tp->md5sig_info->alloced6 == tp->md5sig_info->entries6) { |
599 | keys = kmalloc((sizeof (tp->md5sig_info->keys6[0]) * |
600 | (tp->md5sig_info->entries6 + 1)), GFP_ATOMIC); |
601 | |
602 | if (!keys) { |
603 | tcp_free_md5sig_pool(); |
604 | kfree(newkey); |
605 | return -ENOMEM; |
606 | } |
607 | |
608 | if (tp->md5sig_info->entries6) |
609 | memmove(keys, tp->md5sig_info->keys6, |
610 | (sizeof (tp->md5sig_info->keys6[0]) * |
611 | tp->md5sig_info->entries6)); |
612 | |
613 | kfree(tp->md5sig_info->keys6); |
614 | tp->md5sig_info->keys6 = keys; |
615 | tp->md5sig_info->alloced6++; |
616 | } |
617 | |
618 | ipv6_addr_copy(&tp->md5sig_info->keys6[tp->md5sig_info->entries6].addr, |
619 | peer); |
620 | tp->md5sig_info->keys6[tp->md5sig_info->entries6].base.key = newkey; |
621 | tp->md5sig_info->keys6[tp->md5sig_info->entries6].base.keylen = newkeylen; |
622 | |
623 | tp->md5sig_info->entries6++; |
624 | } |
625 | return 0; |
626 | } |
627 | |
628 | static int tcp_v6_md5_add_func(struct sock *sk, struct sock *addr_sk, |
629 | u8 *newkey, __u8 newkeylen) |
630 | { |
631 | return tcp_v6_md5_do_add(sk, &inet6_sk(addr_sk)->daddr, |
632 | newkey, newkeylen); |
633 | } |
634 | |
635 | static int tcp_v6_md5_do_del(struct sock *sk, struct in6_addr *peer) |
636 | { |
637 | struct tcp_sock *tp = tcp_sk(sk); |
638 | int i; |
639 | |
640 | for (i = 0; i < tp->md5sig_info->entries6; i++) { |
641 | if (ipv6_addr_equal(&tp->md5sig_info->keys6[i].addr, peer)) { |
642 | /* Free the key */ |
643 | kfree(tp->md5sig_info->keys6[i].base.key); |
644 | tp->md5sig_info->entries6--; |
645 | |
646 | if (tp->md5sig_info->entries6 == 0) { |
647 | kfree(tp->md5sig_info->keys6); |
648 | tp->md5sig_info->keys6 = NULL; |
649 | tp->md5sig_info->alloced6 = 0; |
650 | } else { |
651 | /* shrink the database */ |
652 | if (tp->md5sig_info->entries6 != i) |
653 | memmove(&tp->md5sig_info->keys6[i], |
654 | &tp->md5sig_info->keys6[i+1], |
655 | (tp->md5sig_info->entries6 - i) |
656 | * sizeof (tp->md5sig_info->keys6[0])); |
657 | } |
658 | tcp_free_md5sig_pool(); |
659 | return 0; |
660 | } |
661 | } |
662 | return -ENOENT; |
663 | } |
664 | |
665 | static void tcp_v6_clear_md5_list (struct sock *sk) |
666 | { |
667 | struct tcp_sock *tp = tcp_sk(sk); |
668 | int i; |
669 | |
670 | if (tp->md5sig_info->entries6) { |
671 | for (i = 0; i < tp->md5sig_info->entries6; i++) |
672 | kfree(tp->md5sig_info->keys6[i].base.key); |
673 | tp->md5sig_info->entries6 = 0; |
674 | tcp_free_md5sig_pool(); |
675 | } |
676 | |
677 | kfree(tp->md5sig_info->keys6); |
678 | tp->md5sig_info->keys6 = NULL; |
679 | tp->md5sig_info->alloced6 = 0; |
680 | |
681 | if (tp->md5sig_info->entries4) { |
682 | for (i = 0; i < tp->md5sig_info->entries4; i++) |
683 | kfree(tp->md5sig_info->keys4[i].base.key); |
684 | tp->md5sig_info->entries4 = 0; |
685 | tcp_free_md5sig_pool(); |
686 | } |
687 | |
688 | kfree(tp->md5sig_info->keys4); |
689 | tp->md5sig_info->keys4 = NULL; |
690 | tp->md5sig_info->alloced4 = 0; |
691 | } |
692 | |
693 | static int tcp_v6_parse_md5_keys (struct sock *sk, char __user *optval, |
694 | int optlen) |
695 | { |
696 | struct tcp_md5sig cmd; |
697 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&cmd.tcpm_addr; |
698 | u8 *newkey; |
699 | |
700 | if (optlen < sizeof(cmd)) |
701 | return -EINVAL; |
702 | |
703 | if (copy_from_user(&cmd, optval, sizeof(cmd))) |
704 | return -EFAULT; |
705 | |
706 | if (sin6->sin6_family != AF_INET6) |
707 | return -EINVAL; |
708 | |
709 | if (!cmd.tcpm_keylen) { |
710 | if (!tcp_sk(sk)->md5sig_info) |
711 | return -ENOENT; |
712 | if (ipv6_addr_v4mapped(&sin6->sin6_addr)) |
713 | return tcp_v4_md5_do_del(sk, sin6->sin6_addr.s6_addr32[3]); |
714 | return tcp_v6_md5_do_del(sk, &sin6->sin6_addr); |
715 | } |
716 | |
717 | if (cmd.tcpm_keylen > TCP_MD5SIG_MAXKEYLEN) |
718 | return -EINVAL; |
719 | |
720 | if (!tcp_sk(sk)->md5sig_info) { |
721 | struct tcp_sock *tp = tcp_sk(sk); |
722 | struct tcp_md5sig_info *p; |
723 | |
724 | p = kzalloc(sizeof(struct tcp_md5sig_info), GFP_KERNEL); |
725 | if (!p) |
726 | return -ENOMEM; |
727 | |
728 | tp->md5sig_info = p; |
729 | sk->sk_route_caps &= ~NETIF_F_GSO_MASK; |
730 | } |
731 | |
732 | newkey = kmemdup(cmd.tcpm_key, cmd.tcpm_keylen, GFP_KERNEL); |
733 | if (!newkey) |
734 | return -ENOMEM; |
735 | if (ipv6_addr_v4mapped(&sin6->sin6_addr)) { |
736 | return tcp_v4_md5_do_add(sk, sin6->sin6_addr.s6_addr32[3], |
737 | newkey, cmd.tcpm_keylen); |
738 | } |
739 | return tcp_v6_md5_do_add(sk, &sin6->sin6_addr, newkey, cmd.tcpm_keylen); |
740 | } |
741 | |
742 | static int tcp_v6_md5_hash_pseudoheader(struct tcp_md5sig_pool *hp, |
743 | struct in6_addr *daddr, |
744 | struct in6_addr *saddr, int nbytes) |
745 | { |
746 | struct tcp6_pseudohdr *bp; |
747 | struct scatterlist sg; |
748 | |
749 | bp = &hp->md5_blk.ip6; |
750 | /* 1. TCP pseudo-header (RFC2460) */ |
751 | ipv6_addr_copy(&bp->saddr, saddr); |
752 | ipv6_addr_copy(&bp->daddr, daddr); |
753 | bp->protocol = cpu_to_be32(IPPROTO_TCP); |
754 | bp->len = cpu_to_be32(nbytes); |
755 | |
756 | sg_init_one(&sg, bp, sizeof(*bp)); |
757 | return crypto_hash_update(&hp->md5_desc, &sg, sizeof(*bp)); |
758 | } |
759 | |
760 | static int tcp_v6_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key, |
761 | struct in6_addr *daddr, struct in6_addr *saddr, |
762 | struct tcphdr *th) |
763 | { |
764 | struct tcp_md5sig_pool *hp; |
765 | struct hash_desc *desc; |
766 | |
767 | hp = tcp_get_md5sig_pool(); |
768 | if (!hp) |
769 | goto clear_hash_noput; |
770 | desc = &hp->md5_desc; |
771 | |
772 | if (crypto_hash_init(desc)) |
773 | goto clear_hash; |
774 | if (tcp_v6_md5_hash_pseudoheader(hp, daddr, saddr, th->doff << 2)) |
775 | goto clear_hash; |
776 | if (tcp_md5_hash_header(hp, th)) |
777 | goto clear_hash; |
778 | if (tcp_md5_hash_key(hp, key)) |
779 | goto clear_hash; |
780 | if (crypto_hash_final(desc, md5_hash)) |
781 | goto clear_hash; |
782 | |
783 | tcp_put_md5sig_pool(); |
784 | return 0; |
785 | |
786 | clear_hash: |
787 | tcp_put_md5sig_pool(); |
788 | clear_hash_noput: |
789 | memset(md5_hash, 0, 16); |
790 | return 1; |
791 | } |
792 | |
793 | static int tcp_v6_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key, |
794 | struct sock *sk, struct request_sock *req, |
795 | struct sk_buff *skb) |
796 | { |
797 | struct in6_addr *saddr, *daddr; |
798 | struct tcp_md5sig_pool *hp; |
799 | struct hash_desc *desc; |
800 | struct tcphdr *th = tcp_hdr(skb); |
801 | |
802 | if (sk) { |
803 | saddr = &inet6_sk(sk)->saddr; |
804 | daddr = &inet6_sk(sk)->daddr; |
805 | } else if (req) { |
806 | saddr = &inet6_rsk(req)->loc_addr; |
807 | daddr = &inet6_rsk(req)->rmt_addr; |
808 | } else { |
809 | struct ipv6hdr *ip6h = ipv6_hdr(skb); |
810 | saddr = &ip6h->saddr; |
811 | daddr = &ip6h->daddr; |
812 | } |
813 | |
814 | hp = tcp_get_md5sig_pool(); |
815 | if (!hp) |
816 | goto clear_hash_noput; |
817 | desc = &hp->md5_desc; |
818 | |
819 | if (crypto_hash_init(desc)) |
820 | goto clear_hash; |
821 | |
822 | if (tcp_v6_md5_hash_pseudoheader(hp, daddr, saddr, skb->len)) |
823 | goto clear_hash; |
824 | if (tcp_md5_hash_header(hp, th)) |
825 | goto clear_hash; |
826 | if (tcp_md5_hash_skb_data(hp, skb, th->doff << 2)) |
827 | goto clear_hash; |
828 | if (tcp_md5_hash_key(hp, key)) |
829 | goto clear_hash; |
830 | if (crypto_hash_final(desc, md5_hash)) |
831 | goto clear_hash; |
832 | |
833 | tcp_put_md5sig_pool(); |
834 | return 0; |
835 | |
836 | clear_hash: |
837 | tcp_put_md5sig_pool(); |
838 | clear_hash_noput: |
839 | memset(md5_hash, 0, 16); |
840 | return 1; |
841 | } |
842 | |
843 | static int tcp_v6_inbound_md5_hash (struct sock *sk, struct sk_buff *skb) |
844 | { |
845 | __u8 *hash_location = NULL; |
846 | struct tcp_md5sig_key *hash_expected; |
847 | struct ipv6hdr *ip6h = ipv6_hdr(skb); |
848 | struct tcphdr *th = tcp_hdr(skb); |
849 | int genhash; |
850 | u8 newhash[16]; |
851 | |
852 | hash_expected = tcp_v6_md5_do_lookup(sk, &ip6h->saddr); |
853 | hash_location = tcp_parse_md5sig_option(th); |
854 | |
855 | /* We've parsed the options - do we have a hash? */ |
856 | if (!hash_expected && !hash_location) |
857 | return 0; |
858 | |
859 | if (hash_expected && !hash_location) { |
860 | NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND); |
861 | return 1; |
862 | } |
863 | |
864 | if (!hash_expected && hash_location) { |
865 | NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED); |
866 | return 1; |
867 | } |
868 | |
869 | /* check the signature */ |
870 | genhash = tcp_v6_md5_hash_skb(newhash, |
871 | hash_expected, |
872 | NULL, NULL, skb); |
873 | |
874 | if (genhash || memcmp(hash_location, newhash, 16) != 0) { |
875 | if (net_ratelimit()) { |
876 | printk(KERN_INFO "MD5 Hash %s for (%pI6, %u)->(%pI6, %u)\n", |
877 | genhash ? "failed" : "mismatch", |
878 | &ip6h->saddr, ntohs(th->source), |
879 | &ip6h->daddr, ntohs(th->dest)); |
880 | } |
881 | return 1; |
882 | } |
883 | return 0; |
884 | } |
885 | #endif |
886 | |
887 | struct request_sock_ops tcp6_request_sock_ops __read_mostly = { |
888 | .family = AF_INET6, |
889 | .obj_size = sizeof(struct tcp6_request_sock), |
890 | .rtx_syn_ack = tcp_v6_send_synack, |
891 | .send_ack = tcp_v6_reqsk_send_ack, |
892 | .destructor = tcp_v6_reqsk_destructor, |
893 | .send_reset = tcp_v6_send_reset |
894 | }; |
895 | |
896 | #ifdef CONFIG_TCP_MD5SIG |
897 | static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = { |
898 | .md5_lookup = tcp_v6_reqsk_md5_lookup, |
899 | .calc_md5_hash = tcp_v6_md5_hash_skb, |
900 | }; |
901 | #endif |
902 | |
903 | static struct timewait_sock_ops tcp6_timewait_sock_ops = { |
904 | .twsk_obj_size = sizeof(struct tcp6_timewait_sock), |
905 | .twsk_unique = tcp_twsk_unique, |
906 | .twsk_destructor= tcp_twsk_destructor, |
907 | }; |
908 | |
909 | static void tcp_v6_send_check(struct sock *sk, int len, struct sk_buff *skb) |
910 | { |
911 | struct ipv6_pinfo *np = inet6_sk(sk); |
912 | struct tcphdr *th = tcp_hdr(skb); |
913 | |
914 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
915 | th->check = ~csum_ipv6_magic(&np->saddr, &np->daddr, len, IPPROTO_TCP, 0); |
916 | skb->csum_start = skb_transport_header(skb) - skb->head; |
917 | skb->csum_offset = offsetof(struct tcphdr, check); |
918 | } else { |
919 | th->check = csum_ipv6_magic(&np->saddr, &np->daddr, len, IPPROTO_TCP, |
920 | csum_partial(th, th->doff<<2, |
921 | skb->csum)); |
922 | } |
923 | } |
924 | |
925 | static int tcp_v6_gso_send_check(struct sk_buff *skb) |
926 | { |
927 | struct ipv6hdr *ipv6h; |
928 | struct tcphdr *th; |
929 | |
930 | if (!pskb_may_pull(skb, sizeof(*th))) |
931 | return -EINVAL; |
932 | |
933 | ipv6h = ipv6_hdr(skb); |
934 | th = tcp_hdr(skb); |
935 | |
936 | th->check = 0; |
937 | th->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len, |
938 | IPPROTO_TCP, 0); |
939 | skb->csum_start = skb_transport_header(skb) - skb->head; |
940 | skb->csum_offset = offsetof(struct tcphdr, check); |
941 | skb->ip_summed = CHECKSUM_PARTIAL; |
942 | return 0; |
943 | } |
944 | |
945 | static struct sk_buff **tcp6_gro_receive(struct sk_buff **head, |
946 | struct sk_buff *skb) |
947 | { |
948 | struct ipv6hdr *iph = skb_gro_network_header(skb); |
949 | |
950 | switch (skb->ip_summed) { |
951 | case CHECKSUM_COMPLETE: |
952 | if (!tcp_v6_check(skb_gro_len(skb), &iph->saddr, &iph->daddr, |
953 | skb->csum)) { |
954 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
955 | break; |
956 | } |
957 | |
958 | /* fall through */ |
959 | case CHECKSUM_NONE: |
960 | NAPI_GRO_CB(skb)->flush = 1; |
961 | return NULL; |
962 | } |
963 | |
964 | return tcp_gro_receive(head, skb); |
965 | } |
966 | |
967 | static int tcp6_gro_complete(struct sk_buff *skb) |
968 | { |
969 | struct ipv6hdr *iph = ipv6_hdr(skb); |
970 | struct tcphdr *th = tcp_hdr(skb); |
971 | |
972 | th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb), |
973 | &iph->saddr, &iph->daddr, 0); |
974 | skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6; |
975 | |
976 | return tcp_gro_complete(skb); |
977 | } |
978 | |
979 | static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win, |
980 | u32 ts, struct tcp_md5sig_key *key, int rst) |
981 | { |
982 | struct tcphdr *th = tcp_hdr(skb), *t1; |
983 | struct sk_buff *buff; |
984 | struct flowi fl; |
985 | struct net *net = dev_net(skb_dst(skb)->dev); |
986 | struct sock *ctl_sk = net->ipv6.tcp_sk; |
987 | unsigned int tot_len = sizeof(struct tcphdr); |
988 | struct dst_entry *dst; |
989 | __be32 *topt; |
990 | |
991 | if (ts) |
992 | tot_len += TCPOLEN_TSTAMP_ALIGNED; |
993 | #ifdef CONFIG_TCP_MD5SIG |
994 | if (key) |
995 | tot_len += TCPOLEN_MD5SIG_ALIGNED; |
996 | #endif |
997 | |
998 | buff = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) + tot_len, |
999 | GFP_ATOMIC); |
1000 | if (buff == NULL) |
1001 | return; |
1002 | |
1003 | skb_reserve(buff, MAX_HEADER + sizeof(struct ipv6hdr) + tot_len); |
1004 | |
1005 | t1 = (struct tcphdr *) skb_push(buff, tot_len); |
1006 | skb_reset_transport_header(skb); |
1007 | |
1008 | /* Swap the send and the receive. */ |
1009 | memset(t1, 0, sizeof(*t1)); |
1010 | t1->dest = th->source; |
1011 | t1->source = th->dest; |
1012 | t1->doff = tot_len / 4; |
1013 | t1->seq = htonl(seq); |
1014 | t1->ack_seq = htonl(ack); |
1015 | t1->ack = !rst || !th->ack; |
1016 | t1->rst = rst; |
1017 | t1->window = htons(win); |
1018 | |
1019 | topt = (__be32 *)(t1 + 1); |
1020 | |
1021 | if (ts) { |
1022 | *topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | |
1023 | (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP); |
1024 | *topt++ = htonl(tcp_time_stamp); |
1025 | *topt++ = htonl(ts); |
1026 | } |
1027 | |
1028 | #ifdef CONFIG_TCP_MD5SIG |
1029 | if (key) { |
1030 | *topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | |
1031 | (TCPOPT_MD5SIG << 8) | TCPOLEN_MD5SIG); |
1032 | tcp_v6_md5_hash_hdr((__u8 *)topt, key, |
1033 | &ipv6_hdr(skb)->saddr, |
1034 | &ipv6_hdr(skb)->daddr, t1); |
1035 | } |
1036 | #endif |
1037 | |
1038 | buff->csum = csum_partial(t1, tot_len, 0); |
1039 | |
1040 | memset(&fl, 0, sizeof(fl)); |
1041 | ipv6_addr_copy(&fl.fl6_dst, &ipv6_hdr(skb)->saddr); |
1042 | ipv6_addr_copy(&fl.fl6_src, &ipv6_hdr(skb)->daddr); |
1043 | |
1044 | t1->check = csum_ipv6_magic(&fl.fl6_src, &fl.fl6_dst, |
1045 | tot_len, IPPROTO_TCP, |
1046 | buff->csum); |
1047 | |
1048 | fl.proto = IPPROTO_TCP; |
1049 | fl.oif = inet6_iif(skb); |
1050 | fl.fl_ip_dport = t1->dest; |
1051 | fl.fl_ip_sport = t1->source; |
1052 | security_skb_classify_flow(skb, &fl); |
1053 | |
1054 | /* Pass a socket to ip6_dst_lookup either it is for RST |
1055 | * Underlying function will use this to retrieve the network |
1056 | * namespace |
1057 | */ |
1058 | if (!ip6_dst_lookup(ctl_sk, &dst, &fl)) { |
1059 | if (xfrm_lookup(net, &dst, &fl, NULL, 0) >= 0) { |
1060 | skb_dst_set(buff, dst); |
1061 | ip6_xmit(ctl_sk, buff, &fl, NULL, 0); |
1062 | TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); |
1063 | if (rst) |
1064 | TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS); |
1065 | return; |
1066 | } |
1067 | } |
1068 | |
1069 | kfree_skb(buff); |
1070 | } |
1071 | |
1072 | static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb) |
1073 | { |
1074 | struct tcphdr *th = tcp_hdr(skb); |
1075 | u32 seq = 0, ack_seq = 0; |
1076 | struct tcp_md5sig_key *key = NULL; |
1077 | |
1078 | if (th->rst) |
1079 | return; |
1080 | |
1081 | if (!ipv6_unicast_destination(skb)) |
1082 | return; |
1083 | |
1084 | #ifdef CONFIG_TCP_MD5SIG |
1085 | if (sk) |
1086 | key = tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr); |
1087 | #endif |
1088 | |
1089 | if (th->ack) |
1090 | seq = ntohl(th->ack_seq); |
1091 | else |
1092 | ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len - |
1093 | (th->doff << 2); |
1094 | |
1095 | tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1); |
1096 | } |
1097 | |
1098 | static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts, |
1099 | struct tcp_md5sig_key *key) |
1100 | { |
1101 | tcp_v6_send_response(skb, seq, ack, win, ts, key, 0); |
1102 | } |
1103 | |
1104 | static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb) |
1105 | { |
1106 | struct inet_timewait_sock *tw = inet_twsk(sk); |
1107 | struct tcp_timewait_sock *tcptw = tcp_twsk(sk); |
1108 | |
1109 | tcp_v6_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt, |
1110 | tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale, |
1111 | tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw)); |
1112 | |
1113 | inet_twsk_put(tw); |
1114 | } |
1115 | |
1116 | static void tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb, |
1117 | struct request_sock *req) |
1118 | { |
1119 | tcp_v6_send_ack(skb, tcp_rsk(req)->snt_isn + 1, tcp_rsk(req)->rcv_isn + 1, req->rcv_wnd, req->ts_recent, |
1120 | tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr)); |
1121 | } |
1122 | |
1123 | |
1124 | static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb) |
1125 | { |
1126 | struct request_sock *req, **prev; |
1127 | const struct tcphdr *th = tcp_hdr(skb); |
1128 | struct sock *nsk; |
1129 | |
1130 | /* Find possible connection requests. */ |
1131 | req = inet6_csk_search_req(sk, &prev, th->source, |
1132 | &ipv6_hdr(skb)->saddr, |
1133 | &ipv6_hdr(skb)->daddr, inet6_iif(skb)); |
1134 | if (req) |
1135 | return tcp_check_req(sk, skb, req, prev); |
1136 | |
1137 | nsk = __inet6_lookup_established(sock_net(sk), &tcp_hashinfo, |
1138 | &ipv6_hdr(skb)->saddr, th->source, |
1139 | &ipv6_hdr(skb)->daddr, ntohs(th->dest), inet6_iif(skb)); |
1140 | |
1141 | if (nsk) { |
1142 | if (nsk->sk_state != TCP_TIME_WAIT) { |
1143 | bh_lock_sock(nsk); |
1144 | return nsk; |
1145 | } |
1146 | inet_twsk_put(inet_twsk(nsk)); |
1147 | return NULL; |
1148 | } |
1149 | |
1150 | #ifdef CONFIG_SYN_COOKIES |
1151 | if (!th->rst && !th->syn && th->ack) |
1152 | sk = cookie_v6_check(sk, skb); |
1153 | #endif |
1154 | return sk; |
1155 | } |
1156 | |
1157 | /* FIXME: this is substantially similar to the ipv4 code. |
1158 | * Can some kind of merge be done? -- erics |
1159 | */ |
1160 | static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb) |
1161 | { |
1162 | struct inet6_request_sock *treq; |
1163 | struct ipv6_pinfo *np = inet6_sk(sk); |
1164 | struct tcp_options_received tmp_opt; |
1165 | struct tcp_sock *tp = tcp_sk(sk); |
1166 | struct request_sock *req = NULL; |
1167 | __u32 isn = TCP_SKB_CB(skb)->when; |
1168 | #ifdef CONFIG_SYN_COOKIES |
1169 | int want_cookie = 0; |
1170 | #else |
1171 | #define want_cookie 0 |
1172 | #endif |
1173 | |
1174 | if (skb->protocol == htons(ETH_P_IP)) |
1175 | return tcp_v4_conn_request(sk, skb); |
1176 | |
1177 | if (!ipv6_unicast_destination(skb)) |
1178 | goto drop; |
1179 | |
1180 | if (inet_csk_reqsk_queue_is_full(sk) && !isn) { |
1181 | if (net_ratelimit()) |
1182 | syn_flood_warning(skb); |
1183 | #ifdef CONFIG_SYN_COOKIES |
1184 | if (sysctl_tcp_syncookies) |
1185 | want_cookie = 1; |
1186 | else |
1187 | #endif |
1188 | goto drop; |
1189 | } |
1190 | |
1191 | if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) |
1192 | goto drop; |
1193 | |
1194 | req = inet6_reqsk_alloc(&tcp6_request_sock_ops); |
1195 | if (req == NULL) |
1196 | goto drop; |
1197 | |
1198 | #ifdef CONFIG_TCP_MD5SIG |
1199 | tcp_rsk(req)->af_specific = &tcp_request_sock_ipv6_ops; |
1200 | #endif |
1201 | |
1202 | tcp_clear_options(&tmp_opt); |
1203 | tmp_opt.mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr); |
1204 | tmp_opt.user_mss = tp->rx_opt.user_mss; |
1205 | |
1206 | tcp_parse_options(skb, &tmp_opt, 0); |
1207 | |
1208 | if (want_cookie && !tmp_opt.saw_tstamp) |
1209 | tcp_clear_options(&tmp_opt); |
1210 | |
1211 | tmp_opt.tstamp_ok = tmp_opt.saw_tstamp; |
1212 | tcp_openreq_init(req, &tmp_opt, skb); |
1213 | |
1214 | treq = inet6_rsk(req); |
1215 | ipv6_addr_copy(&treq->rmt_addr, &ipv6_hdr(skb)->saddr); |
1216 | ipv6_addr_copy(&treq->loc_addr, &ipv6_hdr(skb)->daddr); |
1217 | if (!want_cookie) |
1218 | TCP_ECN_create_request(req, tcp_hdr(skb)); |
1219 | |
1220 | if (want_cookie) { |
1221 | isn = cookie_v6_init_sequence(sk, skb, &req->mss); |
1222 | req->cookie_ts = tmp_opt.tstamp_ok; |
1223 | } else if (!isn) { |
1224 | if (ipv6_opt_accepted(sk, skb) || |
1225 | np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo || |
1226 | np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) { |
1227 | atomic_inc(&skb->users); |
1228 | treq->pktopts = skb; |
1229 | } |
1230 | treq->iif = sk->sk_bound_dev_if; |
1231 | |
1232 | /* So that link locals have meaning */ |
1233 | if (!sk->sk_bound_dev_if && |
1234 | ipv6_addr_type(&treq->rmt_addr) & IPV6_ADDR_LINKLOCAL) |
1235 | treq->iif = inet6_iif(skb); |
1236 | |
1237 | isn = tcp_v6_init_sequence(skb); |
1238 | } |
1239 | |
1240 | tcp_rsk(req)->snt_isn = isn; |
1241 | |
1242 | security_inet_conn_request(sk, skb, req); |
1243 | |
1244 | if (tcp_v6_send_synack(sk, req)) |
1245 | goto drop; |
1246 | |
1247 | if (!want_cookie) { |
1248 | inet6_csk_reqsk_queue_hash_add(sk, req, TCP_TIMEOUT_INIT); |
1249 | return 0; |
1250 | } |
1251 | |
1252 | drop: |
1253 | if (req) |
1254 | reqsk_free(req); |
1255 | |
1256 | return 0; /* don't send reset */ |
1257 | } |
1258 | |
1259 | static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, |
1260 | struct request_sock *req, |
1261 | struct dst_entry *dst) |
1262 | { |
1263 | struct inet6_request_sock *treq; |
1264 | struct ipv6_pinfo *newnp, *np = inet6_sk(sk); |
1265 | struct tcp6_sock *newtcp6sk; |
1266 | struct inet_sock *newinet; |
1267 | struct tcp_sock *newtp; |
1268 | struct sock *newsk; |
1269 | struct ipv6_txoptions *opt; |
1270 | #ifdef CONFIG_TCP_MD5SIG |
1271 | struct tcp_md5sig_key *key; |
1272 | #endif |
1273 | |
1274 | if (skb->protocol == htons(ETH_P_IP)) { |
1275 | /* |
1276 | * v6 mapped |
1277 | */ |
1278 | |
1279 | newsk = tcp_v4_syn_recv_sock(sk, skb, req, dst); |
1280 | |
1281 | if (newsk == NULL) |
1282 | return NULL; |
1283 | |
1284 | newtcp6sk = (struct tcp6_sock *)newsk; |
1285 | inet_sk(newsk)->pinet6 = &newtcp6sk->inet6; |
1286 | |
1287 | newinet = inet_sk(newsk); |
1288 | newnp = inet6_sk(newsk); |
1289 | newtp = tcp_sk(newsk); |
1290 | |
1291 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); |
1292 | |
1293 | ipv6_addr_set(&newnp->daddr, 0, 0, htonl(0x0000FFFF), |
1294 | newinet->daddr); |
1295 | |
1296 | ipv6_addr_set(&newnp->saddr, 0, 0, htonl(0x0000FFFF), |
1297 | newinet->saddr); |
1298 | |
1299 | ipv6_addr_copy(&newnp->rcv_saddr, &newnp->saddr); |
1300 | |
1301 | inet_csk(newsk)->icsk_af_ops = &ipv6_mapped; |
1302 | newsk->sk_backlog_rcv = tcp_v4_do_rcv; |
1303 | #ifdef CONFIG_TCP_MD5SIG |
1304 | newtp->af_specific = &tcp_sock_ipv6_mapped_specific; |
1305 | #endif |
1306 | |
1307 | newnp->pktoptions = NULL; |
1308 | newnp->opt = NULL; |
1309 | newnp->mcast_oif = inet6_iif(skb); |
1310 | newnp->mcast_hops = ipv6_hdr(skb)->hop_limit; |
1311 | |
1312 | /* |
1313 | * No need to charge this sock to the relevant IPv6 refcnt debug socks count |
1314 | * here, tcp_create_openreq_child now does this for us, see the comment in |
1315 | * that function for the gory details. -acme |
1316 | */ |
1317 | |
1318 | /* It is tricky place. Until this moment IPv4 tcp |
1319 | worked with IPv6 icsk.icsk_af_ops. |
1320 | Sync it now. |
1321 | */ |
1322 | tcp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie); |
1323 | |
1324 | return newsk; |
1325 | } |
1326 | |
1327 | treq = inet6_rsk(req); |
1328 | opt = np->opt; |
1329 | |
1330 | if (sk_acceptq_is_full(sk)) |
1331 | goto out_overflow; |
1332 | |
1333 | if (dst == NULL) { |
1334 | struct in6_addr *final_p = NULL, final; |
1335 | struct flowi fl; |
1336 | |
1337 | memset(&fl, 0, sizeof(fl)); |
1338 | fl.proto = IPPROTO_TCP; |
1339 | ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr); |
1340 | if (opt && opt->srcrt) { |
1341 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; |
1342 | ipv6_addr_copy(&final, &fl.fl6_dst); |
1343 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); |
1344 | final_p = &final; |
1345 | } |
1346 | ipv6_addr_copy(&fl.fl6_src, &treq->loc_addr); |
1347 | fl.oif = sk->sk_bound_dev_if; |
1348 | fl.fl_ip_dport = inet_rsk(req)->rmt_port; |
1349 | fl.fl_ip_sport = inet_rsk(req)->loc_port; |
1350 | security_req_classify_flow(req, &fl); |
1351 | |
1352 | if (ip6_dst_lookup(sk, &dst, &fl)) |
1353 | goto out; |
1354 | |
1355 | if (final_p) |
1356 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
1357 | |
1358 | if ((xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) |
1359 | goto out; |
1360 | } |
1361 | |
1362 | newsk = tcp_create_openreq_child(sk, req, skb); |
1363 | if (newsk == NULL) |
1364 | goto out; |
1365 | |
1366 | /* |
1367 | * No need to charge this sock to the relevant IPv6 refcnt debug socks |
1368 | * count here, tcp_create_openreq_child now does this for us, see the |
1369 | * comment in that function for the gory details. -acme |
1370 | */ |
1371 | |
1372 | newsk->sk_gso_type = SKB_GSO_TCPV6; |
1373 | __ip6_dst_store(newsk, dst, NULL, NULL); |
1374 | |
1375 | newtcp6sk = (struct tcp6_sock *)newsk; |
1376 | inet_sk(newsk)->pinet6 = &newtcp6sk->inet6; |
1377 | |
1378 | newtp = tcp_sk(newsk); |
1379 | newinet = inet_sk(newsk); |
1380 | newnp = inet6_sk(newsk); |
1381 | |
1382 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); |
1383 | |
1384 | ipv6_addr_copy(&newnp->daddr, &treq->rmt_addr); |
1385 | ipv6_addr_copy(&newnp->saddr, &treq->loc_addr); |
1386 | ipv6_addr_copy(&newnp->rcv_saddr, &treq->loc_addr); |
1387 | newsk->sk_bound_dev_if = treq->iif; |
1388 | |
1389 | /* Now IPv6 options... |
1390 | |
1391 | First: no IPv4 options. |
1392 | */ |
1393 | newinet->opt = NULL; |
1394 | newnp->ipv6_fl_list = NULL; |
1395 | |
1396 | /* Clone RX bits */ |
1397 | newnp->rxopt.all = np->rxopt.all; |
1398 | |
1399 | /* Clone pktoptions received with SYN */ |
1400 | newnp->pktoptions = NULL; |
1401 | if (treq->pktopts != NULL) { |
1402 | newnp->pktoptions = skb_clone(treq->pktopts, GFP_ATOMIC); |
1403 | kfree_skb(treq->pktopts); |
1404 | treq->pktopts = NULL; |
1405 | if (newnp->pktoptions) |
1406 | skb_set_owner_r(newnp->pktoptions, newsk); |
1407 | } |
1408 | newnp->opt = NULL; |
1409 | newnp->mcast_oif = inet6_iif(skb); |
1410 | newnp->mcast_hops = ipv6_hdr(skb)->hop_limit; |
1411 | |
1412 | /* Clone native IPv6 options from listening socket (if any) |
1413 | |
1414 | Yes, keeping reference count would be much more clever, |
1415 | but we make one more one thing there: reattach optmem |
1416 | to newsk. |
1417 | */ |
1418 | if (opt) { |
1419 | newnp->opt = ipv6_dup_options(newsk, opt); |
1420 | if (opt != np->opt) |
1421 | sock_kfree_s(sk, opt, opt->tot_len); |
1422 | } |
1423 | |
1424 | inet_csk(newsk)->icsk_ext_hdr_len = 0; |
1425 | if (newnp->opt) |
1426 | inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen + |
1427 | newnp->opt->opt_flen); |
1428 | |
1429 | tcp_mtup_init(newsk); |
1430 | tcp_sync_mss(newsk, dst_mtu(dst)); |
1431 | newtp->advmss = dst_metric(dst, RTAX_ADVMSS); |
1432 | tcp_initialize_rcv_mss(newsk); |
1433 | |
1434 | newinet->daddr = newinet->saddr = newinet->rcv_saddr = LOOPBACK4_IPV6; |
1435 | |
1436 | #ifdef CONFIG_TCP_MD5SIG |
1437 | /* Copy over the MD5 key from the original socket */ |
1438 | if ((key = tcp_v6_md5_do_lookup(sk, &newnp->daddr)) != NULL) { |
1439 | /* We're using one, so create a matching key |
1440 | * on the newsk structure. If we fail to get |
1441 | * memory, then we end up not copying the key |
1442 | * across. Shucks. |
1443 | */ |
1444 | char *newkey = kmemdup(key->key, key->keylen, GFP_ATOMIC); |
1445 | if (newkey != NULL) |
1446 | tcp_v6_md5_do_add(newsk, &newnp->daddr, |
1447 | newkey, key->keylen); |
1448 | } |
1449 | #endif |
1450 | |
1451 | __inet6_hash(newsk); |
1452 | __inet_inherit_port(sk, newsk); |
1453 | |
1454 | return newsk; |
1455 | |
1456 | out_overflow: |
1457 | NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS); |
1458 | out: |
1459 | NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS); |
1460 | if (opt && opt != np->opt) |
1461 | sock_kfree_s(sk, opt, opt->tot_len); |
1462 | dst_release(dst); |
1463 | return NULL; |
1464 | } |
1465 | |
1466 | static __sum16 tcp_v6_checksum_init(struct sk_buff *skb) |
1467 | { |
1468 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
1469 | if (!tcp_v6_check(skb->len, &ipv6_hdr(skb)->saddr, |
1470 | &ipv6_hdr(skb)->daddr, skb->csum)) { |
1471 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1472 | return 0; |
1473 | } |
1474 | } |
1475 | |
1476 | skb->csum = ~csum_unfold(tcp_v6_check(skb->len, |
1477 | &ipv6_hdr(skb)->saddr, |
1478 | &ipv6_hdr(skb)->daddr, 0)); |
1479 | |
1480 | if (skb->len <= 76) { |
1481 | return __skb_checksum_complete(skb); |
1482 | } |
1483 | return 0; |
1484 | } |
1485 | |
1486 | /* The socket must have it's spinlock held when we get |
1487 | * here. |
1488 | * |
1489 | * We have a potential double-lock case here, so even when |
1490 | * doing backlog processing we use the BH locking scheme. |
1491 | * This is because we cannot sleep with the original spinlock |
1492 | * held. |
1493 | */ |
1494 | static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) |
1495 | { |
1496 | struct ipv6_pinfo *np = inet6_sk(sk); |
1497 | struct tcp_sock *tp; |
1498 | struct sk_buff *opt_skb = NULL; |
1499 | |
1500 | /* Imagine: socket is IPv6. IPv4 packet arrives, |
1501 | goes to IPv4 receive handler and backlogged. |
1502 | From backlog it always goes here. Kerboom... |
1503 | Fortunately, tcp_rcv_established and rcv_established |
1504 | handle them correctly, but it is not case with |
1505 | tcp_v6_hnd_req and tcp_v6_send_reset(). --ANK |
1506 | */ |
1507 | |
1508 | if (skb->protocol == htons(ETH_P_IP)) |
1509 | return tcp_v4_do_rcv(sk, skb); |
1510 | |
1511 | #ifdef CONFIG_TCP_MD5SIG |
1512 | if (tcp_v6_inbound_md5_hash (sk, skb)) |
1513 | goto discard; |
1514 | #endif |
1515 | |
1516 | if (sk_filter(sk, skb)) |
1517 | goto discard; |
1518 | |
1519 | /* |
1520 | * socket locking is here for SMP purposes as backlog rcv |
1521 | * is currently called with bh processing disabled. |
1522 | */ |
1523 | |
1524 | /* Do Stevens' IPV6_PKTOPTIONS. |
1525 | |
1526 | Yes, guys, it is the only place in our code, where we |
1527 | may make it not affecting IPv4. |
1528 | The rest of code is protocol independent, |
1529 | and I do not like idea to uglify IPv4. |
1530 | |
1531 | Actually, all the idea behind IPV6_PKTOPTIONS |
1532 | looks not very well thought. For now we latch |
1533 | options, received in the last packet, enqueued |
1534 | by tcp. Feel free to propose better solution. |
1535 | --ANK (980728) |
1536 | */ |
1537 | if (np->rxopt.all) |
1538 | opt_skb = skb_clone(skb, GFP_ATOMIC); |
1539 | |
1540 | if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */ |
1541 | TCP_CHECK_TIMER(sk); |
1542 | if (tcp_rcv_established(sk, skb, tcp_hdr(skb), skb->len)) |
1543 | goto reset; |
1544 | TCP_CHECK_TIMER(sk); |
1545 | if (opt_skb) |
1546 | goto ipv6_pktoptions; |
1547 | return 0; |
1548 | } |
1549 | |
1550 | if (skb->len < tcp_hdrlen(skb) || tcp_checksum_complete(skb)) |
1551 | goto csum_err; |
1552 | |
1553 | if (sk->sk_state == TCP_LISTEN) { |
1554 | struct sock *nsk = tcp_v6_hnd_req(sk, skb); |
1555 | if (!nsk) |
1556 | goto discard; |
1557 | |
1558 | /* |
1559 | * Queue it on the new socket if the new socket is active, |
1560 | * otherwise we just shortcircuit this and continue with |
1561 | * the new socket.. |
1562 | */ |
1563 | if(nsk != sk) { |
1564 | if (tcp_child_process(sk, nsk, skb)) |
1565 | goto reset; |
1566 | if (opt_skb) |
1567 | __kfree_skb(opt_skb); |
1568 | return 0; |
1569 | } |
1570 | } |
1571 | |
1572 | TCP_CHECK_TIMER(sk); |
1573 | if (tcp_rcv_state_process(sk, skb, tcp_hdr(skb), skb->len)) |
1574 | goto reset; |
1575 | TCP_CHECK_TIMER(sk); |
1576 | if (opt_skb) |
1577 | goto ipv6_pktoptions; |
1578 | return 0; |
1579 | |
1580 | reset: |
1581 | tcp_v6_send_reset(sk, skb); |
1582 | discard: |
1583 | if (opt_skb) |
1584 | __kfree_skb(opt_skb); |
1585 | kfree_skb(skb); |
1586 | return 0; |
1587 | csum_err: |
1588 | TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_INERRS); |
1589 | goto discard; |
1590 | |
1591 | |
1592 | ipv6_pktoptions: |
1593 | /* Do you ask, what is it? |
1594 | |
1595 | 1. skb was enqueued by tcp. |
1596 | 2. skb is added to tail of read queue, rather than out of order. |
1597 | 3. socket is not in passive state. |
1598 | 4. Finally, it really contains options, which user wants to receive. |
1599 | */ |
1600 | tp = tcp_sk(sk); |
1601 | if (TCP_SKB_CB(opt_skb)->end_seq == tp->rcv_nxt && |
1602 | !((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) { |
1603 | if (np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo) |
1604 | np->mcast_oif = inet6_iif(opt_skb); |
1605 | if (np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) |
1606 | np->mcast_hops = ipv6_hdr(opt_skb)->hop_limit; |
1607 | if (ipv6_opt_accepted(sk, opt_skb)) { |
1608 | skb_set_owner_r(opt_skb, sk); |
1609 | opt_skb = xchg(&np->pktoptions, opt_skb); |
1610 | } else { |
1611 | __kfree_skb(opt_skb); |
1612 | opt_skb = xchg(&np->pktoptions, NULL); |
1613 | } |
1614 | } |
1615 | |
1616 | kfree_skb(opt_skb); |
1617 | return 0; |
1618 | } |
1619 | |
1620 | static int tcp_v6_rcv(struct sk_buff *skb) |
1621 | { |
1622 | struct tcphdr *th; |
1623 | struct sock *sk; |
1624 | int ret; |
1625 | struct net *net = dev_net(skb->dev); |
1626 | |
1627 | if (skb->pkt_type != PACKET_HOST) |
1628 | goto discard_it; |
1629 | |
1630 | /* |
1631 | * Count it even if it's bad. |
1632 | */ |
1633 | TCP_INC_STATS_BH(net, TCP_MIB_INSEGS); |
1634 | |
1635 | if (!pskb_may_pull(skb, sizeof(struct tcphdr))) |
1636 | goto discard_it; |
1637 | |
1638 | th = tcp_hdr(skb); |
1639 | |
1640 | if (th->doff < sizeof(struct tcphdr)/4) |
1641 | goto bad_packet; |
1642 | if (!pskb_may_pull(skb, th->doff*4)) |
1643 | goto discard_it; |
1644 | |
1645 | if (!skb_csum_unnecessary(skb) && tcp_v6_checksum_init(skb)) |
1646 | goto bad_packet; |
1647 | |
1648 | th = tcp_hdr(skb); |
1649 | TCP_SKB_CB(skb)->seq = ntohl(th->seq); |
1650 | TCP_SKB_CB(skb)->end_seq = (TCP_SKB_CB(skb)->seq + th->syn + th->fin + |
1651 | skb->len - th->doff*4); |
1652 | TCP_SKB_CB(skb)->ack_seq = ntohl(th->ack_seq); |
1653 | TCP_SKB_CB(skb)->when = 0; |
1654 | TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(ipv6_hdr(skb)); |
1655 | TCP_SKB_CB(skb)->sacked = 0; |
1656 | |
1657 | sk = __inet6_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest); |
1658 | if (!sk) |
1659 | goto no_tcp_socket; |
1660 | |
1661 | process: |
1662 | if (sk->sk_state == TCP_TIME_WAIT) |
1663 | goto do_time_wait; |
1664 | |
1665 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
1666 | goto discard_and_relse; |
1667 | |
1668 | if (sk_filter(sk, skb)) |
1669 | goto discard_and_relse; |
1670 | |
1671 | skb->dev = NULL; |
1672 | |
1673 | bh_lock_sock_nested(sk); |
1674 | ret = 0; |
1675 | if (!sock_owned_by_user(sk)) { |
1676 | #ifdef CONFIG_NET_DMA |
1677 | struct tcp_sock *tp = tcp_sk(sk); |
1678 | if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list) |
1679 | tp->ucopy.dma_chan = dma_find_channel(DMA_MEMCPY); |
1680 | if (tp->ucopy.dma_chan) |
1681 | ret = tcp_v6_do_rcv(sk, skb); |
1682 | else |
1683 | #endif |
1684 | { |
1685 | if (!tcp_prequeue(sk, skb)) |
1686 | ret = tcp_v6_do_rcv(sk, skb); |
1687 | } |
1688 | } else |
1689 | sk_add_backlog(sk, skb); |
1690 | bh_unlock_sock(sk); |
1691 | |
1692 | sock_put(sk); |
1693 | return ret ? -1 : 0; |
1694 | |
1695 | no_tcp_socket: |
1696 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
1697 | goto discard_it; |
1698 | |
1699 | if (skb->len < (th->doff<<2) || tcp_checksum_complete(skb)) { |
1700 | bad_packet: |
1701 | TCP_INC_STATS_BH(net, TCP_MIB_INERRS); |
1702 | } else { |
1703 | tcp_v6_send_reset(NULL, skb); |
1704 | } |
1705 | |
1706 | discard_it: |
1707 | |
1708 | /* |
1709 | * Discard frame |
1710 | */ |
1711 | |
1712 | kfree_skb(skb); |
1713 | return 0; |
1714 | |
1715 | discard_and_relse: |
1716 | sock_put(sk); |
1717 | goto discard_it; |
1718 | |
1719 | do_time_wait: |
1720 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) { |
1721 | inet_twsk_put(inet_twsk(sk)); |
1722 | goto discard_it; |
1723 | } |
1724 | |
1725 | if (skb->len < (th->doff<<2) || tcp_checksum_complete(skb)) { |
1726 | TCP_INC_STATS_BH(net, TCP_MIB_INERRS); |
1727 | inet_twsk_put(inet_twsk(sk)); |
1728 | goto discard_it; |
1729 | } |
1730 | |
1731 | switch (tcp_timewait_state_process(inet_twsk(sk), skb, th)) { |
1732 | case TCP_TW_SYN: |
1733 | { |
1734 | struct sock *sk2; |
1735 | |
1736 | sk2 = inet6_lookup_listener(dev_net(skb->dev), &tcp_hashinfo, |
1737 | &ipv6_hdr(skb)->daddr, |
1738 | ntohs(th->dest), inet6_iif(skb)); |
1739 | if (sk2 != NULL) { |
1740 | struct inet_timewait_sock *tw = inet_twsk(sk); |
1741 | inet_twsk_deschedule(tw, &tcp_death_row); |
1742 | inet_twsk_put(tw); |
1743 | sk = sk2; |
1744 | goto process; |
1745 | } |
1746 | /* Fall through to ACK */ |
1747 | } |
1748 | case TCP_TW_ACK: |
1749 | tcp_v6_timewait_ack(sk, skb); |
1750 | break; |
1751 | case TCP_TW_RST: |
1752 | goto no_tcp_socket; |
1753 | case TCP_TW_SUCCESS:; |
1754 | } |
1755 | goto discard_it; |
1756 | } |
1757 | |
1758 | static int tcp_v6_remember_stamp(struct sock *sk) |
1759 | { |
1760 | /* Alas, not yet... */ |
1761 | return 0; |
1762 | } |
1763 | |
1764 | static const struct inet_connection_sock_af_ops ipv6_specific = { |
1765 | .queue_xmit = inet6_csk_xmit, |
1766 | .send_check = tcp_v6_send_check, |
1767 | .rebuild_header = inet6_sk_rebuild_header, |
1768 | .conn_request = tcp_v6_conn_request, |
1769 | .syn_recv_sock = tcp_v6_syn_recv_sock, |
1770 | .remember_stamp = tcp_v6_remember_stamp, |
1771 | .net_header_len = sizeof(struct ipv6hdr), |
1772 | .setsockopt = ipv6_setsockopt, |
1773 | .getsockopt = ipv6_getsockopt, |
1774 | .addr2sockaddr = inet6_csk_addr2sockaddr, |
1775 | .sockaddr_len = sizeof(struct sockaddr_in6), |
1776 | .bind_conflict = inet6_csk_bind_conflict, |
1777 | #ifdef CONFIG_COMPAT |
1778 | .compat_setsockopt = compat_ipv6_setsockopt, |
1779 | .compat_getsockopt = compat_ipv6_getsockopt, |
1780 | #endif |
1781 | }; |
1782 | |
1783 | #ifdef CONFIG_TCP_MD5SIG |
1784 | static const struct tcp_sock_af_ops tcp_sock_ipv6_specific = { |
1785 | .md5_lookup = tcp_v6_md5_lookup, |
1786 | .calc_md5_hash = tcp_v6_md5_hash_skb, |
1787 | .md5_add = tcp_v6_md5_add_func, |
1788 | .md5_parse = tcp_v6_parse_md5_keys, |
1789 | }; |
1790 | #endif |
1791 | |
1792 | /* |
1793 | * TCP over IPv4 via INET6 API |
1794 | */ |
1795 | |
1796 | static const struct inet_connection_sock_af_ops ipv6_mapped = { |
1797 | .queue_xmit = ip_queue_xmit, |
1798 | .send_check = tcp_v4_send_check, |
1799 | .rebuild_header = inet_sk_rebuild_header, |
1800 | .conn_request = tcp_v6_conn_request, |
1801 | .syn_recv_sock = tcp_v6_syn_recv_sock, |
1802 | .remember_stamp = tcp_v4_remember_stamp, |
1803 | .net_header_len = sizeof(struct iphdr), |
1804 | .setsockopt = ipv6_setsockopt, |
1805 | .getsockopt = ipv6_getsockopt, |
1806 | .addr2sockaddr = inet6_csk_addr2sockaddr, |
1807 | .sockaddr_len = sizeof(struct sockaddr_in6), |
1808 | .bind_conflict = inet6_csk_bind_conflict, |
1809 | #ifdef CONFIG_COMPAT |
1810 | .compat_setsockopt = compat_ipv6_setsockopt, |
1811 | .compat_getsockopt = compat_ipv6_getsockopt, |
1812 | #endif |
1813 | }; |
1814 | |
1815 | #ifdef CONFIG_TCP_MD5SIG |
1816 | static const struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific = { |
1817 | .md5_lookup = tcp_v4_md5_lookup, |
1818 | .calc_md5_hash = tcp_v4_md5_hash_skb, |
1819 | .md5_add = tcp_v6_md5_add_func, |
1820 | .md5_parse = tcp_v6_parse_md5_keys, |
1821 | }; |
1822 | #endif |
1823 | |
1824 | /* NOTE: A lot of things set to zero explicitly by call to |
1825 | * sk_alloc() so need not be done here. |
1826 | */ |
1827 | static int tcp_v6_init_sock(struct sock *sk) |
1828 | { |
1829 | struct inet_connection_sock *icsk = inet_csk(sk); |
1830 | struct tcp_sock *tp = tcp_sk(sk); |
1831 | |
1832 | skb_queue_head_init(&tp->out_of_order_queue); |
1833 | tcp_init_xmit_timers(sk); |
1834 | tcp_prequeue_init(tp); |
1835 | |
1836 | icsk->icsk_rto = TCP_TIMEOUT_INIT; |
1837 | tp->mdev = TCP_TIMEOUT_INIT; |
1838 | |
1839 | /* So many TCP implementations out there (incorrectly) count the |
1840 | * initial SYN frame in their delayed-ACK and congestion control |
1841 | * algorithms that we must have the following bandaid to talk |
1842 | * efficiently to them. -DaveM |
1843 | */ |
1844 | tp->snd_cwnd = 2; |
1845 | |
1846 | /* See draft-stevens-tcpca-spec-01 for discussion of the |
1847 | * initialization of these values. |
1848 | */ |
1849 | tp->snd_ssthresh = TCP_INFINITE_SSTHRESH; |
1850 | tp->snd_cwnd_clamp = ~0; |
1851 | tp->mss_cache = 536; |
1852 | |
1853 | tp->reordering = sysctl_tcp_reordering; |
1854 | |
1855 | sk->sk_state = TCP_CLOSE; |
1856 | |
1857 | icsk->icsk_af_ops = &ipv6_specific; |
1858 | icsk->icsk_ca_ops = &tcp_init_congestion_ops; |
1859 | icsk->icsk_sync_mss = tcp_sync_mss; |
1860 | sk->sk_write_space = sk_stream_write_space; |
1861 | sock_set_flag(sk, SOCK_USE_WRITE_QUEUE); |
1862 | |
1863 | #ifdef CONFIG_TCP_MD5SIG |
1864 | tp->af_specific = &tcp_sock_ipv6_specific; |
1865 | #endif |
1866 | |
1867 | sk->sk_sndbuf = sysctl_tcp_wmem[1]; |
1868 | sk->sk_rcvbuf = sysctl_tcp_rmem[1]; |
1869 | |
1870 | local_bh_disable(); |
1871 | percpu_counter_inc(&tcp_sockets_allocated); |
1872 | local_bh_enable(); |
1873 | |
1874 | return 0; |
1875 | } |
1876 | |
1877 | static void tcp_v6_destroy_sock(struct sock *sk) |
1878 | { |
1879 | #ifdef CONFIG_TCP_MD5SIG |
1880 | /* Clean up the MD5 key list */ |
1881 | if (tcp_sk(sk)->md5sig_info) |
1882 | tcp_v6_clear_md5_list(sk); |
1883 | #endif |
1884 | tcp_v4_destroy_sock(sk); |
1885 | inet6_destroy_sock(sk); |
1886 | } |
1887 | |
1888 | #ifdef CONFIG_PROC_FS |
1889 | /* Proc filesystem TCPv6 sock list dumping. */ |
1890 | static void get_openreq6(struct seq_file *seq, |
1891 | struct sock *sk, struct request_sock *req, int i, int uid) |
1892 | { |
1893 | int ttd = req->expires - jiffies; |
1894 | struct in6_addr *src = &inet6_rsk(req)->loc_addr; |
1895 | struct in6_addr *dest = &inet6_rsk(req)->rmt_addr; |
1896 | |
1897 | if (ttd < 0) |
1898 | ttd = 0; |
1899 | |
1900 | seq_printf(seq, |
1901 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
1902 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %p\n", |
1903 | i, |
1904 | src->s6_addr32[0], src->s6_addr32[1], |
1905 | src->s6_addr32[2], src->s6_addr32[3], |
1906 | ntohs(inet_rsk(req)->loc_port), |
1907 | dest->s6_addr32[0], dest->s6_addr32[1], |
1908 | dest->s6_addr32[2], dest->s6_addr32[3], |
1909 | ntohs(inet_rsk(req)->rmt_port), |
1910 | TCP_SYN_RECV, |
1911 | 0,0, /* could print option size, but that is af dependent. */ |
1912 | 1, /* timers active (only the expire timer) */ |
1913 | jiffies_to_clock_t(ttd), |
1914 | req->retrans, |
1915 | uid, |
1916 | 0, /* non standard timer */ |
1917 | 0, /* open_requests have no inode */ |
1918 | 0, req); |
1919 | } |
1920 | |
1921 | static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i) |
1922 | { |
1923 | struct in6_addr *dest, *src; |
1924 | __u16 destp, srcp; |
1925 | int timer_active; |
1926 | unsigned long timer_expires; |
1927 | struct inet_sock *inet = inet_sk(sp); |
1928 | struct tcp_sock *tp = tcp_sk(sp); |
1929 | const struct inet_connection_sock *icsk = inet_csk(sp); |
1930 | struct ipv6_pinfo *np = inet6_sk(sp); |
1931 | |
1932 | dest = &np->daddr; |
1933 | src = &np->rcv_saddr; |
1934 | destp = ntohs(inet->dport); |
1935 | srcp = ntohs(inet->sport); |
1936 | |
1937 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
1938 | timer_active = 1; |
1939 | timer_expires = icsk->icsk_timeout; |
1940 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
1941 | timer_active = 4; |
1942 | timer_expires = icsk->icsk_timeout; |
1943 | } else if (timer_pending(&sp->sk_timer)) { |
1944 | timer_active = 2; |
1945 | timer_expires = sp->sk_timer.expires; |
1946 | } else { |
1947 | timer_active = 0; |
1948 | timer_expires = jiffies; |
1949 | } |
1950 | |
1951 | seq_printf(seq, |
1952 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
1953 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %lu %lu %u %u %d\n", |
1954 | i, |
1955 | src->s6_addr32[0], src->s6_addr32[1], |
1956 | src->s6_addr32[2], src->s6_addr32[3], srcp, |
1957 | dest->s6_addr32[0], dest->s6_addr32[1], |
1958 | dest->s6_addr32[2], dest->s6_addr32[3], destp, |
1959 | sp->sk_state, |
1960 | tp->write_seq-tp->snd_una, |
1961 | (sp->sk_state == TCP_LISTEN) ? sp->sk_ack_backlog : (tp->rcv_nxt - tp->copied_seq), |
1962 | timer_active, |
1963 | jiffies_to_clock_t(timer_expires - jiffies), |
1964 | icsk->icsk_retransmits, |
1965 | sock_i_uid(sp), |
1966 | icsk->icsk_probes_out, |
1967 | sock_i_ino(sp), |
1968 | atomic_read(&sp->sk_refcnt), sp, |
1969 | jiffies_to_clock_t(icsk->icsk_rto), |
1970 | jiffies_to_clock_t(icsk->icsk_ack.ato), |
1971 | (icsk->icsk_ack.quick << 1 ) | icsk->icsk_ack.pingpong, |
1972 | tp->snd_cwnd, |
1973 | tcp_in_initial_slowstart(tp) ? -1 : tp->snd_ssthresh |
1974 | ); |
1975 | } |
1976 | |
1977 | static void get_timewait6_sock(struct seq_file *seq, |
1978 | struct inet_timewait_sock *tw, int i) |
1979 | { |
1980 | struct in6_addr *dest, *src; |
1981 | __u16 destp, srcp; |
1982 | struct inet6_timewait_sock *tw6 = inet6_twsk((struct sock *)tw); |
1983 | int ttd = tw->tw_ttd - jiffies; |
1984 | |
1985 | if (ttd < 0) |
1986 | ttd = 0; |
1987 | |
1988 | dest = &tw6->tw_v6_daddr; |
1989 | src = &tw6->tw_v6_rcv_saddr; |
1990 | destp = ntohs(tw->tw_dport); |
1991 | srcp = ntohs(tw->tw_sport); |
1992 | |
1993 | seq_printf(seq, |
1994 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
1995 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %p\n", |
1996 | i, |
1997 | src->s6_addr32[0], src->s6_addr32[1], |
1998 | src->s6_addr32[2], src->s6_addr32[3], srcp, |
1999 | dest->s6_addr32[0], dest->s6_addr32[1], |
2000 | dest->s6_addr32[2], dest->s6_addr32[3], destp, |
2001 | tw->tw_substate, 0, 0, |
2002 | 3, jiffies_to_clock_t(ttd), 0, 0, 0, 0, |
2003 | atomic_read(&tw->tw_refcnt), tw); |
2004 | } |
2005 | |
2006 | static int tcp6_seq_show(struct seq_file *seq, void *v) |
2007 | { |
2008 | struct tcp_iter_state *st; |
2009 | |
2010 | if (v == SEQ_START_TOKEN) { |
2011 | seq_puts(seq, |
2012 | " sl " |
2013 | "local_address " |
2014 | "remote_address " |
2015 | "st tx_queue rx_queue tr tm->when retrnsmt" |
2016 | " uid timeout inode\n"); |
2017 | goto out; |
2018 | } |
2019 | st = seq->private; |
2020 | |
2021 | switch (st->state) { |
2022 | case TCP_SEQ_STATE_LISTENING: |
2023 | case TCP_SEQ_STATE_ESTABLISHED: |
2024 | get_tcp6_sock(seq, v, st->num); |
2025 | break; |
2026 | case TCP_SEQ_STATE_OPENREQ: |
2027 | get_openreq6(seq, st->syn_wait_sk, v, st->num, st->uid); |
2028 | break; |
2029 | case TCP_SEQ_STATE_TIME_WAIT: |
2030 | get_timewait6_sock(seq, v, st->num); |
2031 | break; |
2032 | } |
2033 | out: |
2034 | return 0; |
2035 | } |
2036 | |
2037 | static struct tcp_seq_afinfo tcp6_seq_afinfo = { |
2038 | .name = "tcp6", |
2039 | .family = AF_INET6, |
2040 | .seq_fops = { |
2041 | .owner = THIS_MODULE, |
2042 | }, |
2043 | .seq_ops = { |
2044 | .show = tcp6_seq_show, |
2045 | }, |
2046 | }; |
2047 | |
2048 | int tcp6_proc_init(struct net *net) |
2049 | { |
2050 | return tcp_proc_register(net, &tcp6_seq_afinfo); |
2051 | } |
2052 | |
2053 | void tcp6_proc_exit(struct net *net) |
2054 | { |
2055 | tcp_proc_unregister(net, &tcp6_seq_afinfo); |
2056 | } |
2057 | #endif |
2058 | |
2059 | struct proto tcpv6_prot = { |
2060 | .name = "TCPv6", |
2061 | .owner = THIS_MODULE, |
2062 | .close = tcp_close, |
2063 | .connect = tcp_v6_connect, |
2064 | .disconnect = tcp_disconnect, |
2065 | .accept = inet_csk_accept, |
2066 | .ioctl = tcp_ioctl, |
2067 | .init = tcp_v6_init_sock, |
2068 | .destroy = tcp_v6_destroy_sock, |
2069 | .shutdown = tcp_shutdown, |
2070 | .setsockopt = tcp_setsockopt, |
2071 | .getsockopt = tcp_getsockopt, |
2072 | .recvmsg = tcp_recvmsg, |
2073 | .backlog_rcv = tcp_v6_do_rcv, |
2074 | .hash = tcp_v6_hash, |
2075 | .unhash = inet_unhash, |
2076 | .get_port = inet_csk_get_port, |
2077 | .enter_memory_pressure = tcp_enter_memory_pressure, |
2078 | .sockets_allocated = &tcp_sockets_allocated, |
2079 | .memory_allocated = &tcp_memory_allocated, |
2080 | .memory_pressure = &tcp_memory_pressure, |
2081 | .orphan_count = &tcp_orphan_count, |
2082 | .sysctl_mem = sysctl_tcp_mem, |
2083 | .sysctl_wmem = sysctl_tcp_wmem, |
2084 | .sysctl_rmem = sysctl_tcp_rmem, |
2085 | .max_header = MAX_TCP_HEADER, |
2086 | .obj_size = sizeof(struct tcp6_sock), |
2087 | .slab_flags = SLAB_DESTROY_BY_RCU, |
2088 | .twsk_prot = &tcp6_timewait_sock_ops, |
2089 | .rsk_prot = &tcp6_request_sock_ops, |
2090 | .h.hashinfo = &tcp_hashinfo, |
2091 | #ifdef CONFIG_COMPAT |
2092 | .compat_setsockopt = compat_tcp_setsockopt, |
2093 | .compat_getsockopt = compat_tcp_getsockopt, |
2094 | #endif |
2095 | }; |
2096 | |
2097 | static const struct inet6_protocol tcpv6_protocol = { |
2098 | .handler = tcp_v6_rcv, |
2099 | .err_handler = tcp_v6_err, |
2100 | .gso_send_check = tcp_v6_gso_send_check, |
2101 | .gso_segment = tcp_tso_segment, |
2102 | .gro_receive = tcp6_gro_receive, |
2103 | .gro_complete = tcp6_gro_complete, |
2104 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
2105 | }; |
2106 | |
2107 | static struct inet_protosw tcpv6_protosw = { |
2108 | .type = SOCK_STREAM, |
2109 | .protocol = IPPROTO_TCP, |
2110 | .prot = &tcpv6_prot, |
2111 | .ops = &inet6_stream_ops, |
2112 | .capability = -1, |
2113 | .no_check = 0, |
2114 | .flags = INET_PROTOSW_PERMANENT | |
2115 | INET_PROTOSW_ICSK, |
2116 | }; |
2117 | |
2118 | static int tcpv6_net_init(struct net *net) |
2119 | { |
2120 | return inet_ctl_sock_create(&net->ipv6.tcp_sk, PF_INET6, |
2121 | SOCK_RAW, IPPROTO_TCP, net); |
2122 | } |
2123 | |
2124 | static void tcpv6_net_exit(struct net *net) |
2125 | { |
2126 | inet_ctl_sock_destroy(net->ipv6.tcp_sk); |
2127 | inet_twsk_purge(net, &tcp_hashinfo, &tcp_death_row, AF_INET6); |
2128 | } |
2129 | |
2130 | static struct pernet_operations tcpv6_net_ops = { |
2131 | .init = tcpv6_net_init, |
2132 | .exit = tcpv6_net_exit, |
2133 | }; |
2134 | |
2135 | int __init tcpv6_init(void) |
2136 | { |
2137 | int ret; |
2138 | |
2139 | ret = inet6_add_protocol(&tcpv6_protocol, IPPROTO_TCP); |
2140 | if (ret) |
2141 | goto out; |
2142 | |
2143 | /* register inet6 protocol */ |
2144 | ret = inet6_register_protosw(&tcpv6_protosw); |
2145 | if (ret) |
2146 | goto out_tcpv6_protocol; |
2147 | |
2148 | ret = register_pernet_subsys(&tcpv6_net_ops); |
2149 | if (ret) |
2150 | goto out_tcpv6_protosw; |
2151 | out: |
2152 | return ret; |
2153 | |
2154 | out_tcpv6_protocol: |
2155 | inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP); |
2156 | out_tcpv6_protosw: |
2157 | inet6_unregister_protosw(&tcpv6_protosw); |
2158 | goto out; |
2159 | } |
2160 | |
2161 | void tcpv6_exit(void) |
2162 | { |
2163 | unregister_pernet_subsys(&tcpv6_net_ops); |
2164 | inet6_unregister_protosw(&tcpv6_protosw); |
2165 | inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP); |
2166 | } |
2167 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9