3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * $Id: tcp_ipv6.c,v 1.144 2002/02/01 22:01:04 davem Exp $
11 * linux/net/ipv4/tcp.c
12 * linux/net/ipv4/tcp_input.c
13 * linux/net/ipv4/tcp_output.c
16 * Hideaki YOSHIFUJI : sin6_scope_id support
17 * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which
18 * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind
19 * a single port at the same time.
20 * YOSHIFUJI Hideaki @USAGI: convert /proc/net/tcp6 to seq_file.
22 * This program is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU General Public License
24 * as published by the Free Software Foundation; either version
25 * 2 of the License, or (at your option) any later version.
28 #include <linux/module.h>
29 #include <linux/errno.h>
30 #include <linux/types.h>
31 #include <linux/socket.h>
32 #include <linux/sockios.h>
33 #include <linux/net.h>
34 #include <linux/jiffies.h>
36 #include <linux/in6.h>
37 #include <linux/netdevice.h>
38 #include <linux/init.h>
39 #include <linux/jhash.h>
40 #include <linux/ipsec.h>
41 #include <linux/times.h>
43 #include <linux/ipv6.h>
44 #include <linux/icmpv6.h>
45 #include <linux/random.h>
48 #include <net/ndisc.h>
49 #include <net/inet6_hashtables.h>
50 #include <net/inet6_connection_sock.h>
52 #include <net/transp_v6.h>
53 #include <net/addrconf.h>
54 #include <net/ip6_route.h>
55 #include <net/ip6_checksum.h>
56 #include <net/inet_ecn.h>
57 #include <net/protocol.h>
59 #include <net/addrconf.h>
61 #include <net/dsfield.h>
62 #include <net/timewait_sock.h>
64 #include <asm/uaccess.h>
66 #include <linux/proc_fs.h>
67 #include <linux/seq_file.h>
69 #include <linux/crypto.h>
70 #include <linux/scatterlist.h>
72 /* Socket used for sending RSTs and ACKs */
73 static struct socket
*tcp6_socket
;
75 static void tcp_v6_send_reset(struct sock
*sk
, struct sk_buff
*skb
);
76 static void tcp_v6_reqsk_send_ack(struct sk_buff
*skb
, struct request_sock
*req
);
77 static void tcp_v6_send_check(struct sock
*sk
, int len
,
80 static int tcp_v6_do_rcv(struct sock
*sk
, struct sk_buff
*skb
);
82 static struct inet_connection_sock_af_ops ipv6_mapped
;
83 static struct inet_connection_sock_af_ops ipv6_specific
;
84 #ifdef CONFIG_TCP_MD5SIG
85 static struct tcp_sock_af_ops tcp_sock_ipv6_specific
;
86 static struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific
;
89 static int tcp_v6_get_port(struct sock
*sk
, unsigned short snum
)
91 return inet_csk_get_port(&tcp_hashinfo
, sk
, snum
,
92 inet6_csk_bind_conflict
);
95 static void tcp_v6_hash(struct sock
*sk
)
97 if (sk
->sk_state
!= TCP_CLOSE
) {
98 if (inet_csk(sk
)->icsk_af_ops
== &ipv6_mapped
) {
103 __inet6_hash(&tcp_hashinfo
, sk
);
108 static __inline__ __sum16
tcp_v6_check(struct tcphdr
*th
, int len
,
109 struct in6_addr
*saddr
,
110 struct in6_addr
*daddr
,
113 return csum_ipv6_magic(saddr
, daddr
, len
, IPPROTO_TCP
, base
);
116 static __u32
tcp_v6_init_sequence(struct sk_buff
*skb
)
118 return secure_tcpv6_sequence_number(ipv6_hdr(skb
)->daddr
.s6_addr32
,
119 ipv6_hdr(skb
)->saddr
.s6_addr32
,
124 static int tcp_v6_connect(struct sock
*sk
, struct sockaddr
*uaddr
,
127 struct sockaddr_in6
*usin
= (struct sockaddr_in6
*) uaddr
;
128 struct inet_sock
*inet
= inet_sk(sk
);
129 struct inet_connection_sock
*icsk
= inet_csk(sk
);
130 struct ipv6_pinfo
*np
= inet6_sk(sk
);
131 struct tcp_sock
*tp
= tcp_sk(sk
);
132 struct in6_addr
*saddr
= NULL
, *final_p
= NULL
, final
;
134 struct dst_entry
*dst
;
138 if (addr_len
< SIN6_LEN_RFC2133
)
141 if (usin
->sin6_family
!= AF_INET6
)
142 return(-EAFNOSUPPORT
);
144 memset(&fl
, 0, sizeof(fl
));
147 fl
.fl6_flowlabel
= usin
->sin6_flowinfo
&IPV6_FLOWINFO_MASK
;
148 IP6_ECN_flow_init(fl
.fl6_flowlabel
);
149 if (fl
.fl6_flowlabel
&IPV6_FLOWLABEL_MASK
) {
150 struct ip6_flowlabel
*flowlabel
;
151 flowlabel
= fl6_sock_lookup(sk
, fl
.fl6_flowlabel
);
152 if (flowlabel
== NULL
)
154 ipv6_addr_copy(&usin
->sin6_addr
, &flowlabel
->dst
);
155 fl6_sock_release(flowlabel
);
160 * connect() to INADDR_ANY means loopback (BSD'ism).
163 if(ipv6_addr_any(&usin
->sin6_addr
))
164 usin
->sin6_addr
.s6_addr
[15] = 0x1;
166 addr_type
= ipv6_addr_type(&usin
->sin6_addr
);
168 if(addr_type
& IPV6_ADDR_MULTICAST
)
171 if (addr_type
&IPV6_ADDR_LINKLOCAL
) {
172 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
173 usin
->sin6_scope_id
) {
174 /* If interface is set while binding, indices
177 if (sk
->sk_bound_dev_if
&&
178 sk
->sk_bound_dev_if
!= usin
->sin6_scope_id
)
181 sk
->sk_bound_dev_if
= usin
->sin6_scope_id
;
184 /* Connect to link-local address requires an interface */
185 if (!sk
->sk_bound_dev_if
)
189 if (tp
->rx_opt
.ts_recent_stamp
&&
190 !ipv6_addr_equal(&np
->daddr
, &usin
->sin6_addr
)) {
191 tp
->rx_opt
.ts_recent
= 0;
192 tp
->rx_opt
.ts_recent_stamp
= 0;
196 ipv6_addr_copy(&np
->daddr
, &usin
->sin6_addr
);
197 np
->flow_label
= fl
.fl6_flowlabel
;
203 if (addr_type
== IPV6_ADDR_MAPPED
) {
204 u32 exthdrlen
= icsk
->icsk_ext_hdr_len
;
205 struct sockaddr_in sin
;
207 SOCK_DEBUG(sk
, "connect: ipv4 mapped\n");
209 if (__ipv6_only_sock(sk
))
212 sin
.sin_family
= AF_INET
;
213 sin
.sin_port
= usin
->sin6_port
;
214 sin
.sin_addr
.s_addr
= usin
->sin6_addr
.s6_addr32
[3];
216 icsk
->icsk_af_ops
= &ipv6_mapped
;
217 sk
->sk_backlog_rcv
= tcp_v4_do_rcv
;
218 #ifdef CONFIG_TCP_MD5SIG
219 tp
->af_specific
= &tcp_sock_ipv6_mapped_specific
;
222 err
= tcp_v4_connect(sk
, (struct sockaddr
*)&sin
, sizeof(sin
));
225 icsk
->icsk_ext_hdr_len
= exthdrlen
;
226 icsk
->icsk_af_ops
= &ipv6_specific
;
227 sk
->sk_backlog_rcv
= tcp_v6_do_rcv
;
228 #ifdef CONFIG_TCP_MD5SIG
229 tp
->af_specific
= &tcp_sock_ipv6_specific
;
233 ipv6_addr_set(&np
->saddr
, 0, 0, htonl(0x0000FFFF),
235 ipv6_addr_set(&np
->rcv_saddr
, 0, 0, htonl(0x0000FFFF),
242 if (!ipv6_addr_any(&np
->rcv_saddr
))
243 saddr
= &np
->rcv_saddr
;
245 fl
.proto
= IPPROTO_TCP
;
246 ipv6_addr_copy(&fl
.fl6_dst
, &np
->daddr
);
247 ipv6_addr_copy(&fl
.fl6_src
,
248 (saddr
? saddr
: &np
->saddr
));
249 fl
.oif
= sk
->sk_bound_dev_if
;
250 fl
.fl_ip_dport
= usin
->sin6_port
;
251 fl
.fl_ip_sport
= inet
->sport
;
253 if (np
->opt
&& np
->opt
->srcrt
) {
254 struct rt0_hdr
*rt0
= (struct rt0_hdr
*)np
->opt
->srcrt
;
255 ipv6_addr_copy(&final
, &fl
.fl6_dst
);
256 ipv6_addr_copy(&fl
.fl6_dst
, rt0
->addr
);
260 security_sk_classify_flow(sk
, &fl
);
262 err
= ip6_dst_lookup(sk
, &dst
, &fl
);
266 ipv6_addr_copy(&fl
.fl6_dst
, final_p
);
268 if ((err
= xfrm_lookup(&dst
, &fl
, sk
, 1)) < 0)
273 ipv6_addr_copy(&np
->rcv_saddr
, saddr
);
276 /* set the source address */
277 ipv6_addr_copy(&np
->saddr
, saddr
);
278 inet
->rcv_saddr
= LOOPBACK4_IPV6
;
280 sk
->sk_gso_type
= SKB_GSO_TCPV6
;
281 __ip6_dst_store(sk
, dst
, NULL
, NULL
);
283 icsk
->icsk_ext_hdr_len
= 0;
285 icsk
->icsk_ext_hdr_len
= (np
->opt
->opt_flen
+
288 tp
->rx_opt
.mss_clamp
= IPV6_MIN_MTU
- sizeof(struct tcphdr
) - sizeof(struct ipv6hdr
);
290 inet
->dport
= usin
->sin6_port
;
292 tcp_set_state(sk
, TCP_SYN_SENT
);
293 err
= inet6_hash_connect(&tcp_death_row
, sk
);
298 tp
->write_seq
= secure_tcpv6_sequence_number(np
->saddr
.s6_addr32
,
303 err
= tcp_connect(sk
);
310 tcp_set_state(sk
, TCP_CLOSE
);
314 sk
->sk_route_caps
= 0;
318 static void tcp_v6_err(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
319 int type
, int code
, int offset
, __be32 info
)
321 struct ipv6hdr
*hdr
= (struct ipv6hdr
*)skb
->data
;
322 const struct tcphdr
*th
= (struct tcphdr
*)(skb
->data
+offset
);
323 struct ipv6_pinfo
*np
;
329 sk
= inet6_lookup(&tcp_hashinfo
, &hdr
->daddr
, th
->dest
, &hdr
->saddr
,
330 th
->source
, skb
->dev
->ifindex
);
333 ICMP6_INC_STATS_BH(__in6_dev_get(skb
->dev
), ICMP6_MIB_INERRORS
);
337 if (sk
->sk_state
== TCP_TIME_WAIT
) {
338 inet_twsk_put(inet_twsk(sk
));
343 if (sock_owned_by_user(sk
))
344 NET_INC_STATS_BH(LINUX_MIB_LOCKDROPPEDICMPS
);
346 if (sk
->sk_state
== TCP_CLOSE
)
350 seq
= ntohl(th
->seq
);
351 if (sk
->sk_state
!= TCP_LISTEN
&&
352 !between(seq
, tp
->snd_una
, tp
->snd_nxt
)) {
353 NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS
);
359 if (type
== ICMPV6_PKT_TOOBIG
) {
360 struct dst_entry
*dst
= NULL
;
362 if (sock_owned_by_user(sk
))
364 if ((1 << sk
->sk_state
) & (TCPF_LISTEN
| TCPF_CLOSE
))
367 /* icmp should have updated the destination cache entry */
368 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
371 struct inet_sock
*inet
= inet_sk(sk
);
374 /* BUGGG_FUTURE: Again, it is not clear how
375 to handle rthdr case. Ignore this complexity
378 memset(&fl
, 0, sizeof(fl
));
379 fl
.proto
= IPPROTO_TCP
;
380 ipv6_addr_copy(&fl
.fl6_dst
, &np
->daddr
);
381 ipv6_addr_copy(&fl
.fl6_src
, &np
->saddr
);
382 fl
.oif
= sk
->sk_bound_dev_if
;
383 fl
.fl_ip_dport
= inet
->dport
;
384 fl
.fl_ip_sport
= inet
->sport
;
385 security_skb_classify_flow(skb
, &fl
);
387 if ((err
= ip6_dst_lookup(sk
, &dst
, &fl
))) {
388 sk
->sk_err_soft
= -err
;
392 if ((err
= xfrm_lookup(&dst
, &fl
, sk
, 0)) < 0) {
393 sk
->sk_err_soft
= -err
;
400 if (inet_csk(sk
)->icsk_pmtu_cookie
> dst_mtu(dst
)) {
401 tcp_sync_mss(sk
, dst_mtu(dst
));
402 tcp_simple_retransmit(sk
);
403 } /* else let the usual retransmit timer handle it */
408 icmpv6_err_convert(type
, code
, &err
);
410 /* Might be for an request_sock */
411 switch (sk
->sk_state
) {
412 struct request_sock
*req
, **prev
;
414 if (sock_owned_by_user(sk
))
417 req
= inet6_csk_search_req(sk
, &prev
, th
->dest
, &hdr
->daddr
,
418 &hdr
->saddr
, inet6_iif(skb
));
422 /* ICMPs are not backlogged, hence we cannot get
423 * an established socket here.
425 BUG_TRAP(req
->sk
== NULL
);
427 if (seq
!= tcp_rsk(req
)->snt_isn
) {
428 NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS
);
432 inet_csk_reqsk_queue_drop(sk
, req
, prev
);
436 case TCP_SYN_RECV
: /* Cannot happen.
437 It can, it SYNs are crossed. --ANK */
438 if (!sock_owned_by_user(sk
)) {
440 sk
->sk_error_report(sk
); /* Wake people up to see the error (see connect in sock.c) */
444 sk
->sk_err_soft
= err
;
448 if (!sock_owned_by_user(sk
) && np
->recverr
) {
450 sk
->sk_error_report(sk
);
452 sk
->sk_err_soft
= err
;
460 static int tcp_v6_send_synack(struct sock
*sk
, struct request_sock
*req
,
461 struct dst_entry
*dst
)
463 struct inet6_request_sock
*treq
= inet6_rsk(req
);
464 struct ipv6_pinfo
*np
= inet6_sk(sk
);
465 struct sk_buff
* skb
;
466 struct ipv6_txoptions
*opt
= NULL
;
467 struct in6_addr
* final_p
= NULL
, final
;
471 memset(&fl
, 0, sizeof(fl
));
472 fl
.proto
= IPPROTO_TCP
;
473 ipv6_addr_copy(&fl
.fl6_dst
, &treq
->rmt_addr
);
474 ipv6_addr_copy(&fl
.fl6_src
, &treq
->loc_addr
);
475 fl
.fl6_flowlabel
= 0;
477 fl
.fl_ip_dport
= inet_rsk(req
)->rmt_port
;
478 fl
.fl_ip_sport
= inet_sk(sk
)->sport
;
479 security_req_classify_flow(req
, &fl
);
484 np
->rxopt
.bits
.osrcrt
== 2 &&
486 struct sk_buff
*pktopts
= treq
->pktopts
;
487 struct inet6_skb_parm
*rxopt
= IP6CB(pktopts
);
489 opt
= ipv6_invert_rthdr(sk
,
490 (struct ipv6_rt_hdr
*)(skb_network_header(pktopts
) +
494 if (opt
&& opt
->srcrt
) {
495 struct rt0_hdr
*rt0
= (struct rt0_hdr
*) opt
->srcrt
;
496 ipv6_addr_copy(&final
, &fl
.fl6_dst
);
497 ipv6_addr_copy(&fl
.fl6_dst
, rt0
->addr
);
501 err
= ip6_dst_lookup(sk
, &dst
, &fl
);
505 ipv6_addr_copy(&fl
.fl6_dst
, final_p
);
506 if ((err
= xfrm_lookup(&dst
, &fl
, sk
, 0)) < 0)
510 skb
= tcp_make_synack(sk
, dst
, req
);
512 struct tcphdr
*th
= skb
->h
.th
;
514 th
->check
= tcp_v6_check(th
, skb
->len
,
515 &treq
->loc_addr
, &treq
->rmt_addr
,
516 csum_partial((char *)th
, skb
->len
, skb
->csum
));
518 ipv6_addr_copy(&fl
.fl6_dst
, &treq
->rmt_addr
);
519 err
= ip6_xmit(sk
, skb
, &fl
, opt
, 0);
520 err
= net_xmit_eval(err
);
524 if (opt
&& opt
!= np
->opt
)
525 sock_kfree_s(sk
, opt
, opt
->tot_len
);
530 static void tcp_v6_reqsk_destructor(struct request_sock
*req
)
532 if (inet6_rsk(req
)->pktopts
)
533 kfree_skb(inet6_rsk(req
)->pktopts
);
536 #ifdef CONFIG_TCP_MD5SIG
537 static struct tcp_md5sig_key
*tcp_v6_md5_do_lookup(struct sock
*sk
,
538 struct in6_addr
*addr
)
540 struct tcp_sock
*tp
= tcp_sk(sk
);
545 if (!tp
->md5sig_info
|| !tp
->md5sig_info
->entries6
)
548 for (i
= 0; i
< tp
->md5sig_info
->entries6
; i
++) {
549 if (ipv6_addr_cmp(&tp
->md5sig_info
->keys6
[i
].addr
, addr
) == 0)
550 return (struct tcp_md5sig_key
*)&tp
->md5sig_info
->keys6
[i
];
555 static struct tcp_md5sig_key
*tcp_v6_md5_lookup(struct sock
*sk
,
556 struct sock
*addr_sk
)
558 return tcp_v6_md5_do_lookup(sk
, &inet6_sk(addr_sk
)->daddr
);
561 static struct tcp_md5sig_key
*tcp_v6_reqsk_md5_lookup(struct sock
*sk
,
562 struct request_sock
*req
)
564 return tcp_v6_md5_do_lookup(sk
, &inet6_rsk(req
)->rmt_addr
);
567 static int tcp_v6_md5_do_add(struct sock
*sk
, struct in6_addr
*peer
,
568 char *newkey
, u8 newkeylen
)
570 /* Add key to the list */
571 struct tcp6_md5sig_key
*key
;
572 struct tcp_sock
*tp
= tcp_sk(sk
);
573 struct tcp6_md5sig_key
*keys
;
575 key
= (struct tcp6_md5sig_key
*) tcp_v6_md5_do_lookup(sk
, peer
);
577 /* modify existing entry - just update that one */
580 key
->keylen
= newkeylen
;
582 /* reallocate new list if current one is full. */
583 if (!tp
->md5sig_info
) {
584 tp
->md5sig_info
= kzalloc(sizeof(*tp
->md5sig_info
), GFP_ATOMIC
);
585 if (!tp
->md5sig_info
) {
590 tcp_alloc_md5sig_pool();
591 if (tp
->md5sig_info
->alloced6
== tp
->md5sig_info
->entries6
) {
592 keys
= kmalloc((sizeof (tp
->md5sig_info
->keys6
[0]) *
593 (tp
->md5sig_info
->entries6
+ 1)), GFP_ATOMIC
);
596 tcp_free_md5sig_pool();
601 if (tp
->md5sig_info
->entries6
)
602 memmove(keys
, tp
->md5sig_info
->keys6
,
603 (sizeof (tp
->md5sig_info
->keys6
[0]) *
604 tp
->md5sig_info
->entries6
));
606 kfree(tp
->md5sig_info
->keys6
);
607 tp
->md5sig_info
->keys6
= keys
;
608 tp
->md5sig_info
->alloced6
++;
611 ipv6_addr_copy(&tp
->md5sig_info
->keys6
[tp
->md5sig_info
->entries6
].addr
,
613 tp
->md5sig_info
->keys6
[tp
->md5sig_info
->entries6
].key
= newkey
;
614 tp
->md5sig_info
->keys6
[tp
->md5sig_info
->entries6
].keylen
= newkeylen
;
616 tp
->md5sig_info
->entries6
++;
621 static int tcp_v6_md5_add_func(struct sock
*sk
, struct sock
*addr_sk
,
622 u8
*newkey
, __u8 newkeylen
)
624 return tcp_v6_md5_do_add(sk
, &inet6_sk(addr_sk
)->daddr
,
628 static int tcp_v6_md5_do_del(struct sock
*sk
, struct in6_addr
*peer
)
630 struct tcp_sock
*tp
= tcp_sk(sk
);
633 for (i
= 0; i
< tp
->md5sig_info
->entries6
; i
++) {
634 if (ipv6_addr_cmp(&tp
->md5sig_info
->keys6
[i
].addr
, peer
) == 0) {
636 kfree(tp
->md5sig_info
->keys6
[i
].key
);
637 tp
->md5sig_info
->entries6
--;
639 if (tp
->md5sig_info
->entries6
== 0) {
640 kfree(tp
->md5sig_info
->keys6
);
641 tp
->md5sig_info
->keys6
= NULL
;
643 tcp_free_md5sig_pool();
647 /* shrink the database */
648 if (tp
->md5sig_info
->entries6
!= i
)
649 memmove(&tp
->md5sig_info
->keys6
[i
],
650 &tp
->md5sig_info
->keys6
[i
+1],
651 (tp
->md5sig_info
->entries6
- i
)
652 * sizeof (tp
->md5sig_info
->keys6
[0]));
659 static void tcp_v6_clear_md5_list (struct sock
*sk
)
661 struct tcp_sock
*tp
= tcp_sk(sk
);
664 if (tp
->md5sig_info
->entries6
) {
665 for (i
= 0; i
< tp
->md5sig_info
->entries6
; i
++)
666 kfree(tp
->md5sig_info
->keys6
[i
].key
);
667 tp
->md5sig_info
->entries6
= 0;
668 tcp_free_md5sig_pool();
671 kfree(tp
->md5sig_info
->keys6
);
672 tp
->md5sig_info
->keys6
= NULL
;
673 tp
->md5sig_info
->alloced6
= 0;
675 if (tp
->md5sig_info
->entries4
) {
676 for (i
= 0; i
< tp
->md5sig_info
->entries4
; i
++)
677 kfree(tp
->md5sig_info
->keys4
[i
].key
);
678 tp
->md5sig_info
->entries4
= 0;
679 tcp_free_md5sig_pool();
682 kfree(tp
->md5sig_info
->keys4
);
683 tp
->md5sig_info
->keys4
= NULL
;
684 tp
->md5sig_info
->alloced4
= 0;
687 static int tcp_v6_parse_md5_keys (struct sock
*sk
, char __user
*optval
,
690 struct tcp_md5sig cmd
;
691 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*)&cmd
.tcpm_addr
;
694 if (optlen
< sizeof(cmd
))
697 if (copy_from_user(&cmd
, optval
, sizeof(cmd
)))
700 if (sin6
->sin6_family
!= AF_INET6
)
703 if (!cmd
.tcpm_keylen
) {
704 if (!tcp_sk(sk
)->md5sig_info
)
706 if (ipv6_addr_type(&sin6
->sin6_addr
) & IPV6_ADDR_MAPPED
)
707 return tcp_v4_md5_do_del(sk
, sin6
->sin6_addr
.s6_addr32
[3]);
708 return tcp_v6_md5_do_del(sk
, &sin6
->sin6_addr
);
711 if (cmd
.tcpm_keylen
> TCP_MD5SIG_MAXKEYLEN
)
714 if (!tcp_sk(sk
)->md5sig_info
) {
715 struct tcp_sock
*tp
= tcp_sk(sk
);
716 struct tcp_md5sig_info
*p
;
718 p
= kzalloc(sizeof(struct tcp_md5sig_info
), GFP_KERNEL
);
725 newkey
= kmemdup(cmd
.tcpm_key
, cmd
.tcpm_keylen
, GFP_KERNEL
);
728 if (ipv6_addr_type(&sin6
->sin6_addr
) & IPV6_ADDR_MAPPED
) {
729 return tcp_v4_md5_do_add(sk
, sin6
->sin6_addr
.s6_addr32
[3],
730 newkey
, cmd
.tcpm_keylen
);
732 return tcp_v6_md5_do_add(sk
, &sin6
->sin6_addr
, newkey
, cmd
.tcpm_keylen
);
735 static int tcp_v6_do_calc_md5_hash(char *md5_hash
, struct tcp_md5sig_key
*key
,
736 struct in6_addr
*saddr
,
737 struct in6_addr
*daddr
,
738 struct tcphdr
*th
, int protocol
,
741 struct scatterlist sg
[4];
745 struct tcp_md5sig_pool
*hp
;
746 struct tcp6_pseudohdr
*bp
;
747 struct hash_desc
*desc
;
749 unsigned int nbytes
= 0;
751 hp
= tcp_get_md5sig_pool();
753 printk(KERN_WARNING
"%s(): hash pool not found...\n", __FUNCTION__
);
754 goto clear_hash_noput
;
756 bp
= &hp
->md5_blk
.ip6
;
757 desc
= &hp
->md5_desc
;
759 /* 1. TCP pseudo-header (RFC2460) */
760 ipv6_addr_copy(&bp
->saddr
, saddr
);
761 ipv6_addr_copy(&bp
->daddr
, daddr
);
762 bp
->len
= htonl(tcplen
);
763 bp
->protocol
= htonl(protocol
);
765 sg_set_buf(&sg
[block
++], bp
, sizeof(*bp
));
766 nbytes
+= sizeof(*bp
);
768 /* 2. TCP header, excluding options */
771 sg_set_buf(&sg
[block
++], th
, sizeof(*th
));
772 nbytes
+= sizeof(*th
);
774 /* 3. TCP segment data (if any) */
775 data_len
= tcplen
- (th
->doff
<< 2);
777 u8
*data
= (u8
*)th
+ (th
->doff
<< 2);
778 sg_set_buf(&sg
[block
++], data
, data_len
);
783 sg_set_buf(&sg
[block
++], key
->key
, key
->keylen
);
784 nbytes
+= key
->keylen
;
786 /* Now store the hash into the packet */
787 err
= crypto_hash_init(desc
);
789 printk(KERN_WARNING
"%s(): hash_init failed\n", __FUNCTION__
);
792 err
= crypto_hash_update(desc
, sg
, nbytes
);
794 printk(KERN_WARNING
"%s(): hash_update failed\n", __FUNCTION__
);
797 err
= crypto_hash_final(desc
, md5_hash
);
799 printk(KERN_WARNING
"%s(): hash_final failed\n", __FUNCTION__
);
803 /* Reset header, and free up the crypto */
804 tcp_put_md5sig_pool();
809 tcp_put_md5sig_pool();
811 memset(md5_hash
, 0, 16);
815 static int tcp_v6_calc_md5_hash(char *md5_hash
, struct tcp_md5sig_key
*key
,
817 struct dst_entry
*dst
,
818 struct request_sock
*req
,
819 struct tcphdr
*th
, int protocol
,
822 struct in6_addr
*saddr
, *daddr
;
825 saddr
= &inet6_sk(sk
)->saddr
;
826 daddr
= &inet6_sk(sk
)->daddr
;
828 saddr
= &inet6_rsk(req
)->loc_addr
;
829 daddr
= &inet6_rsk(req
)->rmt_addr
;
831 return tcp_v6_do_calc_md5_hash(md5_hash
, key
,
833 th
, protocol
, tcplen
);
836 static int tcp_v6_inbound_md5_hash (struct sock
*sk
, struct sk_buff
*skb
)
838 __u8
*hash_location
= NULL
;
839 struct tcp_md5sig_key
*hash_expected
;
840 struct ipv6hdr
*ip6h
= ipv6_hdr(skb
);
841 struct tcphdr
*th
= skb
->h
.th
;
842 int length
= (th
->doff
<< 2) - sizeof (*th
);
847 hash_expected
= tcp_v6_md5_do_lookup(sk
, &ip6h
->saddr
);
849 /* If the TCP option is too short, we can short cut */
850 if (length
< TCPOLEN_MD5SIG
)
851 return hash_expected
? 1 : 0;
867 if (opsize
< 2 || opsize
> length
)
869 if (opcode
== TCPOPT_MD5SIG
) {
879 /* do we have a hash as expected? */
880 if (!hash_expected
) {
883 if (net_ratelimit()) {
884 printk(KERN_INFO
"MD5 Hash NOT expected but found "
885 "(" NIP6_FMT
", %u)->"
886 "(" NIP6_FMT
", %u)\n",
887 NIP6(ip6h
->saddr
), ntohs(th
->source
),
888 NIP6(ip6h
->daddr
), ntohs(th
->dest
));
893 if (!hash_location
) {
894 if (net_ratelimit()) {
895 printk(KERN_INFO
"MD5 Hash expected but NOT found "
896 "(" NIP6_FMT
", %u)->"
897 "(" NIP6_FMT
", %u)\n",
898 NIP6(ip6h
->saddr
), ntohs(th
->source
),
899 NIP6(ip6h
->daddr
), ntohs(th
->dest
));
904 /* check the signature */
905 genhash
= tcp_v6_do_calc_md5_hash(newhash
,
907 &ip6h
->saddr
, &ip6h
->daddr
,
910 if (genhash
|| memcmp(hash_location
, newhash
, 16) != 0) {
911 if (net_ratelimit()) {
912 printk(KERN_INFO
"MD5 Hash %s for "
913 "(" NIP6_FMT
", %u)->"
914 "(" NIP6_FMT
", %u)\n",
915 genhash
? "failed" : "mismatch",
916 NIP6(ip6h
->saddr
), ntohs(th
->source
),
917 NIP6(ip6h
->daddr
), ntohs(th
->dest
));
925 static struct request_sock_ops tcp6_request_sock_ops __read_mostly
= {
927 .obj_size
= sizeof(struct tcp6_request_sock
),
928 .rtx_syn_ack
= tcp_v6_send_synack
,
929 .send_ack
= tcp_v6_reqsk_send_ack
,
930 .destructor
= tcp_v6_reqsk_destructor
,
931 .send_reset
= tcp_v6_send_reset
934 #ifdef CONFIG_TCP_MD5SIG
935 static struct tcp_request_sock_ops tcp_request_sock_ipv6_ops
= {
936 .md5_lookup
= tcp_v6_reqsk_md5_lookup
,
940 static struct timewait_sock_ops tcp6_timewait_sock_ops
= {
941 .twsk_obj_size
= sizeof(struct tcp6_timewait_sock
),
942 .twsk_unique
= tcp_twsk_unique
,
943 .twsk_destructor
= tcp_twsk_destructor
,
946 static void tcp_v6_send_check(struct sock
*sk
, int len
, struct sk_buff
*skb
)
948 struct ipv6_pinfo
*np
= inet6_sk(sk
);
949 struct tcphdr
*th
= skb
->h
.th
;
951 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
952 th
->check
= ~csum_ipv6_magic(&np
->saddr
, &np
->daddr
, len
, IPPROTO_TCP
, 0);
953 skb
->csum_offset
= offsetof(struct tcphdr
, check
);
955 th
->check
= csum_ipv6_magic(&np
->saddr
, &np
->daddr
, len
, IPPROTO_TCP
,
956 csum_partial((char *)th
, th
->doff
<<2,
961 static int tcp_v6_gso_send_check(struct sk_buff
*skb
)
963 struct ipv6hdr
*ipv6h
;
966 if (!pskb_may_pull(skb
, sizeof(*th
)))
969 ipv6h
= ipv6_hdr(skb
);
973 th
->check
= ~csum_ipv6_magic(&ipv6h
->saddr
, &ipv6h
->daddr
, skb
->len
,
975 skb
->csum_offset
= offsetof(struct tcphdr
, check
);
976 skb
->ip_summed
= CHECKSUM_PARTIAL
;
980 static void tcp_v6_send_reset(struct sock
*sk
, struct sk_buff
*skb
)
982 struct tcphdr
*th
= skb
->h
.th
, *t1
;
983 struct sk_buff
*buff
;
985 int tot_len
= sizeof(*th
);
986 #ifdef CONFIG_TCP_MD5SIG
987 struct tcp_md5sig_key
*key
;
993 if (!ipv6_unicast_destination(skb
))
996 #ifdef CONFIG_TCP_MD5SIG
998 key
= tcp_v6_md5_do_lookup(sk
, &ipv6_hdr(skb
)->daddr
);
1003 tot_len
+= TCPOLEN_MD5SIG_ALIGNED
;
1007 * We need to grab some memory, and put together an RST,
1008 * and then put it into the queue to be sent.
1011 buff
= alloc_skb(MAX_HEADER
+ sizeof(struct ipv6hdr
) + tot_len
,
1016 skb_reserve(buff
, MAX_HEADER
+ sizeof(struct ipv6hdr
) + tot_len
);
1018 t1
= (struct tcphdr
*) skb_push(buff
, tot_len
);
1020 /* Swap the send and the receive. */
1021 memset(t1
, 0, sizeof(*t1
));
1022 t1
->dest
= th
->source
;
1023 t1
->source
= th
->dest
;
1024 t1
->doff
= tot_len
/ 4;
1028 t1
->seq
= th
->ack_seq
;
1031 t1
->ack_seq
= htonl(ntohl(th
->seq
) + th
->syn
+ th
->fin
1032 + skb
->len
- (th
->doff
<<2));
1035 #ifdef CONFIG_TCP_MD5SIG
1037 __be32
*opt
= (__be32
*)(t1
+ 1);
1038 opt
[0] = htonl((TCPOPT_NOP
<< 24) |
1039 (TCPOPT_NOP
<< 16) |
1040 (TCPOPT_MD5SIG
<< 8) |
1042 tcp_v6_do_calc_md5_hash((__u8
*)&opt
[1], key
,
1043 &ipv6_hdr(skb
)->daddr
,
1044 &ipv6_hdr(skb
)->saddr
,
1045 t1
, IPPROTO_TCP
, tot_len
);
1049 buff
->csum
= csum_partial((char *)t1
, sizeof(*t1
), 0);
1051 memset(&fl
, 0, sizeof(fl
));
1052 ipv6_addr_copy(&fl
.fl6_dst
, &ipv6_hdr(skb
)->saddr
);
1053 ipv6_addr_copy(&fl
.fl6_src
, &ipv6_hdr(skb
)->daddr
);
1055 t1
->check
= csum_ipv6_magic(&fl
.fl6_src
, &fl
.fl6_dst
,
1056 sizeof(*t1
), IPPROTO_TCP
,
1059 fl
.proto
= IPPROTO_TCP
;
1060 fl
.oif
= inet6_iif(skb
);
1061 fl
.fl_ip_dport
= t1
->dest
;
1062 fl
.fl_ip_sport
= t1
->source
;
1063 security_skb_classify_flow(skb
, &fl
);
1065 /* sk = NULL, but it is safe for now. RST socket required. */
1066 if (!ip6_dst_lookup(NULL
, &buff
->dst
, &fl
)) {
1068 if (xfrm_lookup(&buff
->dst
, &fl
, NULL
, 0) >= 0) {
1069 ip6_xmit(tcp6_socket
->sk
, buff
, &fl
, NULL
, 0);
1070 TCP_INC_STATS_BH(TCP_MIB_OUTSEGS
);
1071 TCP_INC_STATS_BH(TCP_MIB_OUTRSTS
);
1079 static void tcp_v6_send_ack(struct tcp_timewait_sock
*tw
,
1080 struct sk_buff
*skb
, u32 seq
, u32 ack
, u32 win
, u32 ts
)
1082 struct tcphdr
*th
= skb
->h
.th
, *t1
;
1083 struct sk_buff
*buff
;
1085 int tot_len
= sizeof(struct tcphdr
);
1087 #ifdef CONFIG_TCP_MD5SIG
1088 struct tcp_md5sig_key
*key
;
1089 struct tcp_md5sig_key tw_key
;
1092 #ifdef CONFIG_TCP_MD5SIG
1093 if (!tw
&& skb
->sk
) {
1094 key
= tcp_v6_md5_do_lookup(skb
->sk
, &ipv6_hdr(skb
)->daddr
);
1095 } else if (tw
&& tw
->tw_md5_keylen
) {
1096 tw_key
.key
= tw
->tw_md5_key
;
1097 tw_key
.keylen
= tw
->tw_md5_keylen
;
1105 tot_len
+= TCPOLEN_TSTAMP_ALIGNED
;
1106 #ifdef CONFIG_TCP_MD5SIG
1108 tot_len
+= TCPOLEN_MD5SIG_ALIGNED
;
1111 buff
= alloc_skb(MAX_HEADER
+ sizeof(struct ipv6hdr
) + tot_len
,
1116 skb_reserve(buff
, MAX_HEADER
+ sizeof(struct ipv6hdr
) + tot_len
);
1118 t1
= (struct tcphdr
*) skb_push(buff
,tot_len
);
1120 /* Swap the send and the receive. */
1121 memset(t1
, 0, sizeof(*t1
));
1122 t1
->dest
= th
->source
;
1123 t1
->source
= th
->dest
;
1124 t1
->doff
= tot_len
/4;
1125 t1
->seq
= htonl(seq
);
1126 t1
->ack_seq
= htonl(ack
);
1128 t1
->window
= htons(win
);
1130 topt
= (__be32
*)(t1
+ 1);
1133 *topt
++ = htonl((TCPOPT_NOP
<< 24) | (TCPOPT_NOP
<< 16) |
1134 (TCPOPT_TIMESTAMP
<< 8) | TCPOLEN_TIMESTAMP
);
1135 *topt
++ = htonl(tcp_time_stamp
);
1139 #ifdef CONFIG_TCP_MD5SIG
1141 *topt
++ = htonl((TCPOPT_NOP
<< 24) | (TCPOPT_NOP
<< 16) |
1142 (TCPOPT_MD5SIG
<< 8) | TCPOLEN_MD5SIG
);
1143 tcp_v6_do_calc_md5_hash((__u8
*)topt
, key
,
1144 &ipv6_hdr(skb
)->daddr
,
1145 &ipv6_hdr(skb
)->saddr
,
1146 t1
, IPPROTO_TCP
, tot_len
);
1150 buff
->csum
= csum_partial((char *)t1
, tot_len
, 0);
1152 memset(&fl
, 0, sizeof(fl
));
1153 ipv6_addr_copy(&fl
.fl6_dst
, &ipv6_hdr(skb
)->saddr
);
1154 ipv6_addr_copy(&fl
.fl6_src
, &ipv6_hdr(skb
)->daddr
);
1156 t1
->check
= csum_ipv6_magic(&fl
.fl6_src
, &fl
.fl6_dst
,
1157 tot_len
, IPPROTO_TCP
,
1160 fl
.proto
= IPPROTO_TCP
;
1161 fl
.oif
= inet6_iif(skb
);
1162 fl
.fl_ip_dport
= t1
->dest
;
1163 fl
.fl_ip_sport
= t1
->source
;
1164 security_skb_classify_flow(skb
, &fl
);
1166 if (!ip6_dst_lookup(NULL
, &buff
->dst
, &fl
)) {
1167 if (xfrm_lookup(&buff
->dst
, &fl
, NULL
, 0) >= 0) {
1168 ip6_xmit(tcp6_socket
->sk
, buff
, &fl
, NULL
, 0);
1169 TCP_INC_STATS_BH(TCP_MIB_OUTSEGS
);
1177 static void tcp_v6_timewait_ack(struct sock
*sk
, struct sk_buff
*skb
)
1179 struct inet_timewait_sock
*tw
= inet_twsk(sk
);
1180 struct tcp_timewait_sock
*tcptw
= tcp_twsk(sk
);
1182 tcp_v6_send_ack(tcptw
, skb
, tcptw
->tw_snd_nxt
, tcptw
->tw_rcv_nxt
,
1183 tcptw
->tw_rcv_wnd
>> tw
->tw_rcv_wscale
,
1184 tcptw
->tw_ts_recent
);
1189 static void tcp_v6_reqsk_send_ack(struct sk_buff
*skb
, struct request_sock
*req
)
1191 tcp_v6_send_ack(NULL
, skb
, tcp_rsk(req
)->snt_isn
+ 1, tcp_rsk(req
)->rcv_isn
+ 1, req
->rcv_wnd
, req
->ts_recent
);
1195 static struct sock
*tcp_v6_hnd_req(struct sock
*sk
,struct sk_buff
*skb
)
1197 struct request_sock
*req
, **prev
;
1198 const struct tcphdr
*th
= skb
->h
.th
;
1201 /* Find possible connection requests. */
1202 req
= inet6_csk_search_req(sk
, &prev
, th
->source
,
1203 &ipv6_hdr(skb
)->saddr
,
1204 &ipv6_hdr(skb
)->daddr
, inet6_iif(skb
));
1206 return tcp_check_req(sk
, skb
, req
, prev
);
1208 nsk
= __inet6_lookup_established(&tcp_hashinfo
, &ipv6_hdr(skb
)->saddr
,
1209 th
->source
, &ipv6_hdr(skb
)->daddr
,
1210 ntohs(th
->dest
), inet6_iif(skb
));
1213 if (nsk
->sk_state
!= TCP_TIME_WAIT
) {
1217 inet_twsk_put(inet_twsk(nsk
));
1221 #if 0 /*def CONFIG_SYN_COOKIES*/
1222 if (!th
->rst
&& !th
->syn
&& th
->ack
)
1223 sk
= cookie_v6_check(sk
, skb
, &(IPCB(skb
)->opt
));
1228 /* FIXME: this is substantially similar to the ipv4 code.
1229 * Can some kind of merge be done? -- erics
1231 static int tcp_v6_conn_request(struct sock
*sk
, struct sk_buff
*skb
)
1233 struct inet6_request_sock
*treq
;
1234 struct ipv6_pinfo
*np
= inet6_sk(sk
);
1235 struct tcp_options_received tmp_opt
;
1236 struct tcp_sock
*tp
= tcp_sk(sk
);
1237 struct request_sock
*req
= NULL
;
1238 __u32 isn
= TCP_SKB_CB(skb
)->when
;
1240 if (skb
->protocol
== htons(ETH_P_IP
))
1241 return tcp_v4_conn_request(sk
, skb
);
1243 if (!ipv6_unicast_destination(skb
))
1247 * There are no SYN attacks on IPv6, yet...
1249 if (inet_csk_reqsk_queue_is_full(sk
) && !isn
) {
1250 if (net_ratelimit())
1251 printk(KERN_INFO
"TCPv6: dropping request, synflood is possible\n");
1255 if (sk_acceptq_is_full(sk
) && inet_csk_reqsk_queue_young(sk
) > 1)
1258 req
= inet6_reqsk_alloc(&tcp6_request_sock_ops
);
1262 #ifdef CONFIG_TCP_MD5SIG
1263 tcp_rsk(req
)->af_specific
= &tcp_request_sock_ipv6_ops
;
1266 tcp_clear_options(&tmp_opt
);
1267 tmp_opt
.mss_clamp
= IPV6_MIN_MTU
- sizeof(struct tcphdr
) - sizeof(struct ipv6hdr
);
1268 tmp_opt
.user_mss
= tp
->rx_opt
.user_mss
;
1270 tcp_parse_options(skb
, &tmp_opt
, 0);
1272 tmp_opt
.tstamp_ok
= tmp_opt
.saw_tstamp
;
1273 tcp_openreq_init(req
, &tmp_opt
, skb
);
1275 treq
= inet6_rsk(req
);
1276 ipv6_addr_copy(&treq
->rmt_addr
, &ipv6_hdr(skb
)->saddr
);
1277 ipv6_addr_copy(&treq
->loc_addr
, &ipv6_hdr(skb
)->daddr
);
1278 TCP_ECN_create_request(req
, skb
->h
.th
);
1279 treq
->pktopts
= NULL
;
1280 if (ipv6_opt_accepted(sk
, skb
) ||
1281 np
->rxopt
.bits
.rxinfo
|| np
->rxopt
.bits
.rxoinfo
||
1282 np
->rxopt
.bits
.rxhlim
|| np
->rxopt
.bits
.rxohlim
) {
1283 atomic_inc(&skb
->users
);
1284 treq
->pktopts
= skb
;
1286 treq
->iif
= sk
->sk_bound_dev_if
;
1288 /* So that link locals have meaning */
1289 if (!sk
->sk_bound_dev_if
&&
1290 ipv6_addr_type(&treq
->rmt_addr
) & IPV6_ADDR_LINKLOCAL
)
1291 treq
->iif
= inet6_iif(skb
);
1294 isn
= tcp_v6_init_sequence(skb
);
1296 tcp_rsk(req
)->snt_isn
= isn
;
1298 security_inet_conn_request(sk
, skb
, req
);
1300 if (tcp_v6_send_synack(sk
, req
, NULL
))
1303 inet6_csk_reqsk_queue_hash_add(sk
, req
, TCP_TIMEOUT_INIT
);
1310 return 0; /* don't send reset */
1313 static struct sock
* tcp_v6_syn_recv_sock(struct sock
*sk
, struct sk_buff
*skb
,
1314 struct request_sock
*req
,
1315 struct dst_entry
*dst
)
1317 struct inet6_request_sock
*treq
= inet6_rsk(req
);
1318 struct ipv6_pinfo
*newnp
, *np
= inet6_sk(sk
);
1319 struct tcp6_sock
*newtcp6sk
;
1320 struct inet_sock
*newinet
;
1321 struct tcp_sock
*newtp
;
1323 struct ipv6_txoptions
*opt
;
1324 #ifdef CONFIG_TCP_MD5SIG
1325 struct tcp_md5sig_key
*key
;
1328 if (skb
->protocol
== htons(ETH_P_IP
)) {
1333 newsk
= tcp_v4_syn_recv_sock(sk
, skb
, req
, dst
);
1338 newtcp6sk
= (struct tcp6_sock
*)newsk
;
1339 inet_sk(newsk
)->pinet6
= &newtcp6sk
->inet6
;
1341 newinet
= inet_sk(newsk
);
1342 newnp
= inet6_sk(newsk
);
1343 newtp
= tcp_sk(newsk
);
1345 memcpy(newnp
, np
, sizeof(struct ipv6_pinfo
));
1347 ipv6_addr_set(&newnp
->daddr
, 0, 0, htonl(0x0000FFFF),
1350 ipv6_addr_set(&newnp
->saddr
, 0, 0, htonl(0x0000FFFF),
1353 ipv6_addr_copy(&newnp
->rcv_saddr
, &newnp
->saddr
);
1355 inet_csk(newsk
)->icsk_af_ops
= &ipv6_mapped
;
1356 newsk
->sk_backlog_rcv
= tcp_v4_do_rcv
;
1357 #ifdef CONFIG_TCP_MD5SIG
1358 newtp
->af_specific
= &tcp_sock_ipv6_mapped_specific
;
1361 newnp
->pktoptions
= NULL
;
1363 newnp
->mcast_oif
= inet6_iif(skb
);
1364 newnp
->mcast_hops
= ipv6_hdr(skb
)->hop_limit
;
1367 * No need to charge this sock to the relevant IPv6 refcnt debug socks count
1368 * here, tcp_create_openreq_child now does this for us, see the comment in
1369 * that function for the gory details. -acme
1372 /* It is tricky place. Until this moment IPv4 tcp
1373 worked with IPv6 icsk.icsk_af_ops.
1376 tcp_sync_mss(newsk
, inet_csk(newsk
)->icsk_pmtu_cookie
);
1383 if (sk_acceptq_is_full(sk
))
1386 if (np
->rxopt
.bits
.osrcrt
== 2 &&
1387 opt
== NULL
&& treq
->pktopts
) {
1388 struct inet6_skb_parm
*rxopt
= IP6CB(treq
->pktopts
);
1390 opt
= ipv6_invert_rthdr(sk
,
1391 (struct ipv6_rt_hdr
*)(skb_network_header(treq
->pktopts
) +
1396 struct in6_addr
*final_p
= NULL
, final
;
1399 memset(&fl
, 0, sizeof(fl
));
1400 fl
.proto
= IPPROTO_TCP
;
1401 ipv6_addr_copy(&fl
.fl6_dst
, &treq
->rmt_addr
);
1402 if (opt
&& opt
->srcrt
) {
1403 struct rt0_hdr
*rt0
= (struct rt0_hdr
*) opt
->srcrt
;
1404 ipv6_addr_copy(&final
, &fl
.fl6_dst
);
1405 ipv6_addr_copy(&fl
.fl6_dst
, rt0
->addr
);
1408 ipv6_addr_copy(&fl
.fl6_src
, &treq
->loc_addr
);
1409 fl
.oif
= sk
->sk_bound_dev_if
;
1410 fl
.fl_ip_dport
= inet_rsk(req
)->rmt_port
;
1411 fl
.fl_ip_sport
= inet_sk(sk
)->sport
;
1412 security_req_classify_flow(req
, &fl
);
1414 if (ip6_dst_lookup(sk
, &dst
, &fl
))
1418 ipv6_addr_copy(&fl
.fl6_dst
, final_p
);
1420 if ((xfrm_lookup(&dst
, &fl
, sk
, 0)) < 0)
1424 newsk
= tcp_create_openreq_child(sk
, req
, skb
);
1429 * No need to charge this sock to the relevant IPv6 refcnt debug socks
1430 * count here, tcp_create_openreq_child now does this for us, see the
1431 * comment in that function for the gory details. -acme
1434 newsk
->sk_gso_type
= SKB_GSO_TCPV6
;
1435 __ip6_dst_store(newsk
, dst
, NULL
, NULL
);
1437 newtcp6sk
= (struct tcp6_sock
*)newsk
;
1438 inet_sk(newsk
)->pinet6
= &newtcp6sk
->inet6
;
1440 newtp
= tcp_sk(newsk
);
1441 newinet
= inet_sk(newsk
);
1442 newnp
= inet6_sk(newsk
);
1444 memcpy(newnp
, np
, sizeof(struct ipv6_pinfo
));
1446 ipv6_addr_copy(&newnp
->daddr
, &treq
->rmt_addr
);
1447 ipv6_addr_copy(&newnp
->saddr
, &treq
->loc_addr
);
1448 ipv6_addr_copy(&newnp
->rcv_saddr
, &treq
->loc_addr
);
1449 newsk
->sk_bound_dev_if
= treq
->iif
;
1451 /* Now IPv6 options...
1453 First: no IPv4 options.
1455 newinet
->opt
= NULL
;
1456 newnp
->ipv6_fl_list
= NULL
;
1459 newnp
->rxopt
.all
= np
->rxopt
.all
;
1461 /* Clone pktoptions received with SYN */
1462 newnp
->pktoptions
= NULL
;
1463 if (treq
->pktopts
!= NULL
) {
1464 newnp
->pktoptions
= skb_clone(treq
->pktopts
, GFP_ATOMIC
);
1465 kfree_skb(treq
->pktopts
);
1466 treq
->pktopts
= NULL
;
1467 if (newnp
->pktoptions
)
1468 skb_set_owner_r(newnp
->pktoptions
, newsk
);
1471 newnp
->mcast_oif
= inet6_iif(skb
);
1472 newnp
->mcast_hops
= ipv6_hdr(skb
)->hop_limit
;
1474 /* Clone native IPv6 options from listening socket (if any)
1476 Yes, keeping reference count would be much more clever,
1477 but we make one more one thing there: reattach optmem
1481 newnp
->opt
= ipv6_dup_options(newsk
, opt
);
1483 sock_kfree_s(sk
, opt
, opt
->tot_len
);
1486 inet_csk(newsk
)->icsk_ext_hdr_len
= 0;
1488 inet_csk(newsk
)->icsk_ext_hdr_len
= (newnp
->opt
->opt_nflen
+
1489 newnp
->opt
->opt_flen
);
1491 tcp_mtup_init(newsk
);
1492 tcp_sync_mss(newsk
, dst_mtu(dst
));
1493 newtp
->advmss
= dst_metric(dst
, RTAX_ADVMSS
);
1494 tcp_initialize_rcv_mss(newsk
);
1496 newinet
->daddr
= newinet
->saddr
= newinet
->rcv_saddr
= LOOPBACK4_IPV6
;
1498 #ifdef CONFIG_TCP_MD5SIG
1499 /* Copy over the MD5 key from the original socket */
1500 if ((key
= tcp_v6_md5_do_lookup(sk
, &newnp
->daddr
)) != NULL
) {
1501 /* We're using one, so create a matching key
1502 * on the newsk structure. If we fail to get
1503 * memory, then we end up not copying the key
1506 char *newkey
= kmemdup(key
->key
, key
->keylen
, GFP_ATOMIC
);
1508 tcp_v6_md5_do_add(newsk
, &inet6_sk(sk
)->daddr
,
1509 newkey
, key
->keylen
);
1513 __inet6_hash(&tcp_hashinfo
, newsk
);
1514 inet_inherit_port(&tcp_hashinfo
, sk
, newsk
);
1519 NET_INC_STATS_BH(LINUX_MIB_LISTENOVERFLOWS
);
1521 NET_INC_STATS_BH(LINUX_MIB_LISTENDROPS
);
1522 if (opt
&& opt
!= np
->opt
)
1523 sock_kfree_s(sk
, opt
, opt
->tot_len
);
1528 static __sum16
tcp_v6_checksum_init(struct sk_buff
*skb
)
1530 if (skb
->ip_summed
== CHECKSUM_COMPLETE
) {
1531 if (!tcp_v6_check(skb
->h
.th
, skb
->len
, &ipv6_hdr(skb
)->saddr
,
1532 &ipv6_hdr(skb
)->daddr
, skb
->csum
)) {
1533 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
1538 skb
->csum
= ~csum_unfold(tcp_v6_check(skb
->h
.th
, skb
->len
,
1539 &ipv6_hdr(skb
)->saddr
,
1540 &ipv6_hdr(skb
)->daddr
, 0));
1542 if (skb
->len
<= 76) {
1543 return __skb_checksum_complete(skb
);
1548 /* The socket must have it's spinlock held when we get
1551 * We have a potential double-lock case here, so even when
1552 * doing backlog processing we use the BH locking scheme.
1553 * This is because we cannot sleep with the original spinlock
1556 static int tcp_v6_do_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1558 struct ipv6_pinfo
*np
= inet6_sk(sk
);
1559 struct tcp_sock
*tp
;
1560 struct sk_buff
*opt_skb
= NULL
;
1562 /* Imagine: socket is IPv6. IPv4 packet arrives,
1563 goes to IPv4 receive handler and backlogged.
1564 From backlog it always goes here. Kerboom...
1565 Fortunately, tcp_rcv_established and rcv_established
1566 handle them correctly, but it is not case with
1567 tcp_v6_hnd_req and tcp_v6_send_reset(). --ANK
1570 if (skb
->protocol
== htons(ETH_P_IP
))
1571 return tcp_v4_do_rcv(sk
, skb
);
1573 #ifdef CONFIG_TCP_MD5SIG
1574 if (tcp_v6_inbound_md5_hash (sk
, skb
))
1578 if (sk_filter(sk
, skb
))
1582 * socket locking is here for SMP purposes as backlog rcv
1583 * is currently called with bh processing disabled.
1586 /* Do Stevens' IPV6_PKTOPTIONS.
1588 Yes, guys, it is the only place in our code, where we
1589 may make it not affecting IPv4.
1590 The rest of code is protocol independent,
1591 and I do not like idea to uglify IPv4.
1593 Actually, all the idea behind IPV6_PKTOPTIONS
1594 looks not very well thought. For now we latch
1595 options, received in the last packet, enqueued
1596 by tcp. Feel free to propose better solution.
1600 opt_skb
= skb_clone(skb
, GFP_ATOMIC
);
1602 if (sk
->sk_state
== TCP_ESTABLISHED
) { /* Fast path */
1603 TCP_CHECK_TIMER(sk
);
1604 if (tcp_rcv_established(sk
, skb
, skb
->h
.th
, skb
->len
))
1606 TCP_CHECK_TIMER(sk
);
1608 goto ipv6_pktoptions
;
1612 if (skb
->len
< (skb
->h
.th
->doff
<<2) || tcp_checksum_complete(skb
))
1615 if (sk
->sk_state
== TCP_LISTEN
) {
1616 struct sock
*nsk
= tcp_v6_hnd_req(sk
, skb
);
1621 * Queue it on the new socket if the new socket is active,
1622 * otherwise we just shortcircuit this and continue with
1626 if (tcp_child_process(sk
, nsk
, skb
))
1629 __kfree_skb(opt_skb
);
1634 TCP_CHECK_TIMER(sk
);
1635 if (tcp_rcv_state_process(sk
, skb
, skb
->h
.th
, skb
->len
))
1637 TCP_CHECK_TIMER(sk
);
1639 goto ipv6_pktoptions
;
1643 tcp_v6_send_reset(sk
, skb
);
1646 __kfree_skb(opt_skb
);
1650 TCP_INC_STATS_BH(TCP_MIB_INERRS
);
1655 /* Do you ask, what is it?
1657 1. skb was enqueued by tcp.
1658 2. skb is added to tail of read queue, rather than out of order.
1659 3. socket is not in passive state.
1660 4. Finally, it really contains options, which user wants to receive.
1663 if (TCP_SKB_CB(opt_skb
)->end_seq
== tp
->rcv_nxt
&&
1664 !((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_LISTEN
))) {
1665 if (np
->rxopt
.bits
.rxinfo
|| np
->rxopt
.bits
.rxoinfo
)
1666 np
->mcast_oif
= inet6_iif(opt_skb
);
1667 if (np
->rxopt
.bits
.rxhlim
|| np
->rxopt
.bits
.rxohlim
)
1668 np
->mcast_hops
= ipv6_hdr(opt_skb
)->hop_limit
;
1669 if (ipv6_opt_accepted(sk
, opt_skb
)) {
1670 skb_set_owner_r(opt_skb
, sk
);
1671 opt_skb
= xchg(&np
->pktoptions
, opt_skb
);
1673 __kfree_skb(opt_skb
);
1674 opt_skb
= xchg(&np
->pktoptions
, NULL
);
1683 static int tcp_v6_rcv(struct sk_buff
**pskb
)
1685 struct sk_buff
*skb
= *pskb
;
1690 if (skb
->pkt_type
!= PACKET_HOST
)
1694 * Count it even if it's bad.
1696 TCP_INC_STATS_BH(TCP_MIB_INSEGS
);
1698 if (!pskb_may_pull(skb
, sizeof(struct tcphdr
)))
1703 if (th
->doff
< sizeof(struct tcphdr
)/4)
1705 if (!pskb_may_pull(skb
, th
->doff
*4))
1708 if ((skb
->ip_summed
!= CHECKSUM_UNNECESSARY
&&
1709 tcp_v6_checksum_init(skb
)))
1713 TCP_SKB_CB(skb
)->seq
= ntohl(th
->seq
);
1714 TCP_SKB_CB(skb
)->end_seq
= (TCP_SKB_CB(skb
)->seq
+ th
->syn
+ th
->fin
+
1715 skb
->len
- th
->doff
*4);
1716 TCP_SKB_CB(skb
)->ack_seq
= ntohl(th
->ack_seq
);
1717 TCP_SKB_CB(skb
)->when
= 0;
1718 TCP_SKB_CB(skb
)->flags
= ipv6_get_dsfield(ipv6_hdr(skb
));
1719 TCP_SKB_CB(skb
)->sacked
= 0;
1721 sk
= __inet6_lookup(&tcp_hashinfo
, &ipv6_hdr(skb
)->saddr
, th
->source
,
1722 &ipv6_hdr(skb
)->daddr
, ntohs(th
->dest
),
1729 if (sk
->sk_state
== TCP_TIME_WAIT
)
1732 if (!xfrm6_policy_check(sk
, XFRM_POLICY_IN
, skb
))
1733 goto discard_and_relse
;
1735 if (sk_filter(sk
, skb
))
1736 goto discard_and_relse
;
1740 bh_lock_sock_nested(sk
);
1742 if (!sock_owned_by_user(sk
)) {
1743 #ifdef CONFIG_NET_DMA
1744 struct tcp_sock
*tp
= tcp_sk(sk
);
1745 if (tp
->ucopy
.dma_chan
)
1746 ret
= tcp_v6_do_rcv(sk
, skb
);
1750 if (!tcp_prequeue(sk
, skb
))
1751 ret
= tcp_v6_do_rcv(sk
, skb
);
1754 sk_add_backlog(sk
, skb
);
1758 return ret
? -1 : 0;
1761 if (!xfrm6_policy_check(NULL
, XFRM_POLICY_IN
, skb
))
1764 if (skb
->len
< (th
->doff
<<2) || tcp_checksum_complete(skb
)) {
1766 TCP_INC_STATS_BH(TCP_MIB_INERRS
);
1768 tcp_v6_send_reset(NULL
, skb
);
1785 if (!xfrm6_policy_check(NULL
, XFRM_POLICY_IN
, skb
)) {
1786 inet_twsk_put(inet_twsk(sk
));
1790 if (skb
->len
< (th
->doff
<<2) || tcp_checksum_complete(skb
)) {
1791 TCP_INC_STATS_BH(TCP_MIB_INERRS
);
1792 inet_twsk_put(inet_twsk(sk
));
1796 switch (tcp_timewait_state_process(inet_twsk(sk
), skb
, th
)) {
1801 sk2
= inet6_lookup_listener(&tcp_hashinfo
,
1802 &ipv6_hdr(skb
)->daddr
,
1803 ntohs(th
->dest
), inet6_iif(skb
));
1805 struct inet_timewait_sock
*tw
= inet_twsk(sk
);
1806 inet_twsk_deschedule(tw
, &tcp_death_row
);
1811 /* Fall through to ACK */
1814 tcp_v6_timewait_ack(sk
, skb
);
1818 case TCP_TW_SUCCESS
:;
1823 static int tcp_v6_remember_stamp(struct sock
*sk
)
1825 /* Alas, not yet... */
1829 static struct inet_connection_sock_af_ops ipv6_specific
= {
1830 .queue_xmit
= inet6_csk_xmit
,
1831 .send_check
= tcp_v6_send_check
,
1832 .rebuild_header
= inet6_sk_rebuild_header
,
1833 .conn_request
= tcp_v6_conn_request
,
1834 .syn_recv_sock
= tcp_v6_syn_recv_sock
,
1835 .remember_stamp
= tcp_v6_remember_stamp
,
1836 .net_header_len
= sizeof(struct ipv6hdr
),
1837 .setsockopt
= ipv6_setsockopt
,
1838 .getsockopt
= ipv6_getsockopt
,
1839 .addr2sockaddr
= inet6_csk_addr2sockaddr
,
1840 .sockaddr_len
= sizeof(struct sockaddr_in6
),
1841 #ifdef CONFIG_COMPAT
1842 .compat_setsockopt
= compat_ipv6_setsockopt
,
1843 .compat_getsockopt
= compat_ipv6_getsockopt
,
1847 #ifdef CONFIG_TCP_MD5SIG
1848 static struct tcp_sock_af_ops tcp_sock_ipv6_specific
= {
1849 .md5_lookup
= tcp_v6_md5_lookup
,
1850 .calc_md5_hash
= tcp_v6_calc_md5_hash
,
1851 .md5_add
= tcp_v6_md5_add_func
,
1852 .md5_parse
= tcp_v6_parse_md5_keys
,
1857 * TCP over IPv4 via INET6 API
1860 static struct inet_connection_sock_af_ops ipv6_mapped
= {
1861 .queue_xmit
= ip_queue_xmit
,
1862 .send_check
= tcp_v4_send_check
,
1863 .rebuild_header
= inet_sk_rebuild_header
,
1864 .conn_request
= tcp_v6_conn_request
,
1865 .syn_recv_sock
= tcp_v6_syn_recv_sock
,
1866 .remember_stamp
= tcp_v4_remember_stamp
,
1867 .net_header_len
= sizeof(struct iphdr
),
1868 .setsockopt
= ipv6_setsockopt
,
1869 .getsockopt
= ipv6_getsockopt
,
1870 .addr2sockaddr
= inet6_csk_addr2sockaddr
,
1871 .sockaddr_len
= sizeof(struct sockaddr_in6
),
1872 #ifdef CONFIG_COMPAT
1873 .compat_setsockopt
= compat_ipv6_setsockopt
,
1874 .compat_getsockopt
= compat_ipv6_getsockopt
,
1878 #ifdef CONFIG_TCP_MD5SIG
1879 static struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific
= {
1880 .md5_lookup
= tcp_v4_md5_lookup
,
1881 .calc_md5_hash
= tcp_v4_calc_md5_hash
,
1882 .md5_add
= tcp_v6_md5_add_func
,
1883 .md5_parse
= tcp_v6_parse_md5_keys
,
1887 /* NOTE: A lot of things set to zero explicitly by call to
1888 * sk_alloc() so need not be done here.
1890 static int tcp_v6_init_sock(struct sock
*sk
)
1892 struct inet_connection_sock
*icsk
= inet_csk(sk
);
1893 struct tcp_sock
*tp
= tcp_sk(sk
);
1895 skb_queue_head_init(&tp
->out_of_order_queue
);
1896 tcp_init_xmit_timers(sk
);
1897 tcp_prequeue_init(tp
);
1899 icsk
->icsk_rto
= TCP_TIMEOUT_INIT
;
1900 tp
->mdev
= TCP_TIMEOUT_INIT
;
1902 /* So many TCP implementations out there (incorrectly) count the
1903 * initial SYN frame in their delayed-ACK and congestion control
1904 * algorithms that we must have the following bandaid to talk
1905 * efficiently to them. -DaveM
1909 /* See draft-stevens-tcpca-spec-01 for discussion of the
1910 * initialization of these values.
1912 tp
->snd_ssthresh
= 0x7fffffff;
1913 tp
->snd_cwnd_clamp
= ~0;
1914 tp
->mss_cache
= 536;
1916 tp
->reordering
= sysctl_tcp_reordering
;
1918 sk
->sk_state
= TCP_CLOSE
;
1920 icsk
->icsk_af_ops
= &ipv6_specific
;
1921 icsk
->icsk_ca_ops
= &tcp_init_congestion_ops
;
1922 icsk
->icsk_sync_mss
= tcp_sync_mss
;
1923 sk
->sk_write_space
= sk_stream_write_space
;
1924 sock_set_flag(sk
, SOCK_USE_WRITE_QUEUE
);
1926 #ifdef CONFIG_TCP_MD5SIG
1927 tp
->af_specific
= &tcp_sock_ipv6_specific
;
1930 sk
->sk_sndbuf
= sysctl_tcp_wmem
[1];
1931 sk
->sk_rcvbuf
= sysctl_tcp_rmem
[1];
1933 atomic_inc(&tcp_sockets_allocated
);
1938 static int tcp_v6_destroy_sock(struct sock
*sk
)
1940 #ifdef CONFIG_TCP_MD5SIG
1941 /* Clean up the MD5 key list */
1942 if (tcp_sk(sk
)->md5sig_info
)
1943 tcp_v6_clear_md5_list(sk
);
1945 tcp_v4_destroy_sock(sk
);
1946 return inet6_destroy_sock(sk
);
1949 /* Proc filesystem TCPv6 sock list dumping. */
1950 static void get_openreq6(struct seq_file
*seq
,
1951 struct sock
*sk
, struct request_sock
*req
, int i
, int uid
)
1953 int ttd
= req
->expires
- jiffies
;
1954 struct in6_addr
*src
= &inet6_rsk(req
)->loc_addr
;
1955 struct in6_addr
*dest
= &inet6_rsk(req
)->rmt_addr
;
1961 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
1962 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %p\n",
1964 src
->s6_addr32
[0], src
->s6_addr32
[1],
1965 src
->s6_addr32
[2], src
->s6_addr32
[3],
1966 ntohs(inet_sk(sk
)->sport
),
1967 dest
->s6_addr32
[0], dest
->s6_addr32
[1],
1968 dest
->s6_addr32
[2], dest
->s6_addr32
[3],
1969 ntohs(inet_rsk(req
)->rmt_port
),
1971 0,0, /* could print option size, but that is af dependent. */
1972 1, /* timers active (only the expire timer) */
1973 jiffies_to_clock_t(ttd
),
1976 0, /* non standard timer */
1977 0, /* open_requests have no inode */
1981 static void get_tcp6_sock(struct seq_file
*seq
, struct sock
*sp
, int i
)
1983 struct in6_addr
*dest
, *src
;
1986 unsigned long timer_expires
;
1987 struct inet_sock
*inet
= inet_sk(sp
);
1988 struct tcp_sock
*tp
= tcp_sk(sp
);
1989 const struct inet_connection_sock
*icsk
= inet_csk(sp
);
1990 struct ipv6_pinfo
*np
= inet6_sk(sp
);
1993 src
= &np
->rcv_saddr
;
1994 destp
= ntohs(inet
->dport
);
1995 srcp
= ntohs(inet
->sport
);
1997 if (icsk
->icsk_pending
== ICSK_TIME_RETRANS
) {
1999 timer_expires
= icsk
->icsk_timeout
;
2000 } else if (icsk
->icsk_pending
== ICSK_TIME_PROBE0
) {
2002 timer_expires
= icsk
->icsk_timeout
;
2003 } else if (timer_pending(&sp
->sk_timer
)) {
2005 timer_expires
= sp
->sk_timer
.expires
;
2008 timer_expires
= jiffies
;
2012 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
2013 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %u %u %u %u %d\n",
2015 src
->s6_addr32
[0], src
->s6_addr32
[1],
2016 src
->s6_addr32
[2], src
->s6_addr32
[3], srcp
,
2017 dest
->s6_addr32
[0], dest
->s6_addr32
[1],
2018 dest
->s6_addr32
[2], dest
->s6_addr32
[3], destp
,
2020 tp
->write_seq
-tp
->snd_una
,
2021 (sp
->sk_state
== TCP_LISTEN
) ? sp
->sk_ack_backlog
: (tp
->rcv_nxt
- tp
->copied_seq
),
2023 jiffies_to_clock_t(timer_expires
- jiffies
),
2024 icsk
->icsk_retransmits
,
2026 icsk
->icsk_probes_out
,
2028 atomic_read(&sp
->sk_refcnt
), sp
,
2031 (icsk
->icsk_ack
.quick
<< 1 ) | icsk
->icsk_ack
.pingpong
,
2032 tp
->snd_cwnd
, tp
->snd_ssthresh
>=0xFFFF?-1:tp
->snd_ssthresh
2036 static void get_timewait6_sock(struct seq_file
*seq
,
2037 struct inet_timewait_sock
*tw
, int i
)
2039 struct in6_addr
*dest
, *src
;
2041 struct inet6_timewait_sock
*tw6
= inet6_twsk((struct sock
*)tw
);
2042 int ttd
= tw
->tw_ttd
- jiffies
;
2047 dest
= &tw6
->tw_v6_daddr
;
2048 src
= &tw6
->tw_v6_rcv_saddr
;
2049 destp
= ntohs(tw
->tw_dport
);
2050 srcp
= ntohs(tw
->tw_sport
);
2053 "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
2054 "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %p\n",
2056 src
->s6_addr32
[0], src
->s6_addr32
[1],
2057 src
->s6_addr32
[2], src
->s6_addr32
[3], srcp
,
2058 dest
->s6_addr32
[0], dest
->s6_addr32
[1],
2059 dest
->s6_addr32
[2], dest
->s6_addr32
[3], destp
,
2060 tw
->tw_substate
, 0, 0,
2061 3, jiffies_to_clock_t(ttd
), 0, 0, 0, 0,
2062 atomic_read(&tw
->tw_refcnt
), tw
);
2065 #ifdef CONFIG_PROC_FS
2066 static int tcp6_seq_show(struct seq_file
*seq
, void *v
)
2068 struct tcp_iter_state
*st
;
2070 if (v
== SEQ_START_TOKEN
) {
2075 "st tx_queue rx_queue tr tm->when retrnsmt"
2076 " uid timeout inode\n");
2081 switch (st
->state
) {
2082 case TCP_SEQ_STATE_LISTENING
:
2083 case TCP_SEQ_STATE_ESTABLISHED
:
2084 get_tcp6_sock(seq
, v
, st
->num
);
2086 case TCP_SEQ_STATE_OPENREQ
:
2087 get_openreq6(seq
, st
->syn_wait_sk
, v
, st
->num
, st
->uid
);
2089 case TCP_SEQ_STATE_TIME_WAIT
:
2090 get_timewait6_sock(seq
, v
, st
->num
);
2097 static struct file_operations tcp6_seq_fops
;
2098 static struct tcp_seq_afinfo tcp6_seq_afinfo
= {
2099 .owner
= THIS_MODULE
,
2102 .seq_show
= tcp6_seq_show
,
2103 .seq_fops
= &tcp6_seq_fops
,
2106 int __init
tcp6_proc_init(void)
2108 return tcp_proc_register(&tcp6_seq_afinfo
);
2111 void tcp6_proc_exit(void)
2113 tcp_proc_unregister(&tcp6_seq_afinfo
);
2117 struct proto tcpv6_prot
= {
2119 .owner
= THIS_MODULE
,
2121 .connect
= tcp_v6_connect
,
2122 .disconnect
= tcp_disconnect
,
2123 .accept
= inet_csk_accept
,
2125 .init
= tcp_v6_init_sock
,
2126 .destroy
= tcp_v6_destroy_sock
,
2127 .shutdown
= tcp_shutdown
,
2128 .setsockopt
= tcp_setsockopt
,
2129 .getsockopt
= tcp_getsockopt
,
2130 .sendmsg
= tcp_sendmsg
,
2131 .recvmsg
= tcp_recvmsg
,
2132 .backlog_rcv
= tcp_v6_do_rcv
,
2133 .hash
= tcp_v6_hash
,
2134 .unhash
= tcp_unhash
,
2135 .get_port
= tcp_v6_get_port
,
2136 .enter_memory_pressure
= tcp_enter_memory_pressure
,
2137 .sockets_allocated
= &tcp_sockets_allocated
,
2138 .memory_allocated
= &tcp_memory_allocated
,
2139 .memory_pressure
= &tcp_memory_pressure
,
2140 .orphan_count
= &tcp_orphan_count
,
2141 .sysctl_mem
= sysctl_tcp_mem
,
2142 .sysctl_wmem
= sysctl_tcp_wmem
,
2143 .sysctl_rmem
= sysctl_tcp_rmem
,
2144 .max_header
= MAX_TCP_HEADER
,
2145 .obj_size
= sizeof(struct tcp6_sock
),
2146 .twsk_prot
= &tcp6_timewait_sock_ops
,
2147 .rsk_prot
= &tcp6_request_sock_ops
,
2148 #ifdef CONFIG_COMPAT
2149 .compat_setsockopt
= compat_tcp_setsockopt
,
2150 .compat_getsockopt
= compat_tcp_getsockopt
,
2154 static struct inet6_protocol tcpv6_protocol
= {
2155 .handler
= tcp_v6_rcv
,
2156 .err_handler
= tcp_v6_err
,
2157 .gso_send_check
= tcp_v6_gso_send_check
,
2158 .gso_segment
= tcp_tso_segment
,
2159 .flags
= INET6_PROTO_NOPOLICY
|INET6_PROTO_FINAL
,
2162 static struct inet_protosw tcpv6_protosw
= {
2163 .type
= SOCK_STREAM
,
2164 .protocol
= IPPROTO_TCP
,
2165 .prot
= &tcpv6_prot
,
2166 .ops
= &inet6_stream_ops
,
2169 .flags
= INET_PROTOSW_PERMANENT
|
2173 void __init
tcpv6_init(void)
2175 /* register inet6 protocol */
2176 if (inet6_add_protocol(&tcpv6_protocol
, IPPROTO_TCP
) < 0)
2177 printk(KERN_ERR
"tcpv6_init: Could not register protocol\n");
2178 inet6_register_protosw(&tcpv6_protosw
);
2180 if (inet_csk_ctl_sock_create(&tcp6_socket
, PF_INET6
, SOCK_RAW
,
2182 panic("Failed to create the TCPv6 control socket.\n");