1
by Bastian Blank
Import upstream version 2.6.26 |
1 |
/*
|
2 |
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
3 |
* operating system. INET is implemented using the BSD Socket
|
|
4 |
* interface as the means of communication with the user level.
|
|
5 |
*
|
|
6 |
* Implementation of the Transmission Control Protocol(TCP).
|
|
7 |
*
|
|
8 |
* IPv4 specific functions
|
|
9 |
*
|
|
10 |
*
|
|
11 |
* code split from:
|
|
12 |
* linux/ipv4/tcp.c
|
|
13 |
* linux/ipv4/tcp_input.c
|
|
14 |
* linux/ipv4/tcp_output.c
|
|
15 |
*
|
|
16 |
* See tcp.c for author information
|
|
17 |
*
|
|
18 |
* This program is free software; you can redistribute it and/or
|
|
19 |
* modify it under the terms of the GNU General Public License
|
|
20 |
* as published by the Free Software Foundation; either version
|
|
21 |
* 2 of the License, or (at your option) any later version.
|
|
22 |
*/
|
|
23 |
||
24 |
/*
|
|
25 |
* Changes:
|
|
26 |
* David S. Miller : New socket lookup architecture.
|
|
27 |
* This code is dedicated to John Dyson.
|
|
28 |
* David S. Miller : Change semantics of established hash,
|
|
29 |
* half is devoted to TIME_WAIT sockets
|
|
30 |
* and the rest go in the other half.
|
|
31 |
* Andi Kleen : Add support for syncookies and fixed
|
|
32 |
* some bugs: ip options weren't passed to
|
|
33 |
* the TCP layer, missed a check for an
|
|
34 |
* ACK bit.
|
|
35 |
* Andi Kleen : Implemented fast path mtu discovery.
|
|
36 |
* Fixed many serious bugs in the
|
|
37 |
* request_sock handling and moved
|
|
38 |
* most of it into the af independent code.
|
|
39 |
* Added tail drop and some other bugfixes.
|
|
40 |
* Added new listen semantics.
|
|
41 |
* Mike McLagan : Routing by source
|
|
42 |
* Juan Jose Ciarlante: ip_dynaddr bits
|
|
43 |
* Andi Kleen: various fixes.
|
|
44 |
* Vitaly E. Lavrov : Transparent proxy revived after year
|
|
45 |
* coma.
|
|
46 |
* Andi Kleen : Fix new listen.
|
|
47 |
* Andi Kleen : Fix accept error reporting.
|
|
48 |
* YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which
|
|
49 |
* Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind
|
|
50 |
* a single port at the same time.
|
|
51 |
*/
|
|
52 |
||
53 |
||
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
54 |
#include <linux/bottom_half.h> |
1
by Bastian Blank
Import upstream version 2.6.26 |
55 |
#include <linux/types.h> |
56 |
#include <linux/fcntl.h> |
|
57 |
#include <linux/module.h> |
|
58 |
#include <linux/random.h> |
|
59 |
#include <linux/cache.h> |
|
60 |
#include <linux/jhash.h> |
|
61 |
#include <linux/init.h> |
|
62 |
#include <linux/times.h> |
|
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
63 |
#include <linux/slab.h> |
1
by Bastian Blank
Import upstream version 2.6.26 |
64 |
|
65 |
#include <net/net_namespace.h> |
|
66 |
#include <net/icmp.h> |
|
67 |
#include <net/inet_hashtables.h> |
|
68 |
#include <net/tcp.h> |
|
69 |
#include <net/transp_v6.h> |
|
70 |
#include <net/ipv6.h> |
|
71 |
#include <net/inet_common.h> |
|
72 |
#include <net/timewait_sock.h> |
|
73 |
#include <net/xfrm.h> |
|
74 |
#include <net/netdma.h> |
|
1.2.27
by Ben Hutchings
Import upstream version 3.1.0~rc4 |
75 |
#include <net/secure_seq.h> |
1.2.33
by Ben Hutchings
Import upstream version 3.3~rc6 |
76 |
#include <net/tcp_memcontrol.h> |
1
by Bastian Blank
Import upstream version 2.6.26 |
77 |
|
78 |
#include <linux/inet.h> |
|
79 |
#include <linux/ipv6.h> |
|
80 |
#include <linux/stddef.h> |
|
81 |
#include <linux/proc_fs.h> |
|
82 |
#include <linux/seq_file.h> |
|
83 |
||
84 |
#include <linux/crypto.h> |
|
85 |
#include <linux/scatterlist.h> |
|
86 |
||
87 |
int sysctl_tcp_tw_reuse __read_mostly; |
|
88 |
int sysctl_tcp_low_latency __read_mostly; |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
89 |
EXPORT_SYMBOL(sysctl_tcp_low_latency); |
1
by Bastian Blank
Import upstream version 2.6.26 |
90 |
|
91 |
||
92 |
#ifdef CONFIG_TCP_MD5SIG
|
|
93 |
static struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, |
|
94 |
__be32 addr); |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
95 |
static int tcp_v4_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key, |
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
96 |
__be32 daddr, __be32 saddr, const struct tcphdr *th); |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
97 |
#else
|
98 |
static inline |
|
99 |
struct tcp_md5sig_key *tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr) |
|
100 |
{
|
|
101 |
return NULL; |
|
102 |
}
|
|
1
by Bastian Blank
Import upstream version 2.6.26 |
103 |
#endif
|
104 |
||
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
105 |
struct inet_hashinfo tcp_hashinfo; |
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
106 |
EXPORT_SYMBOL(tcp_hashinfo); |
1
by Bastian Blank
Import upstream version 2.6.26 |
107 |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
108 |
static inline __u32 tcp_v4_init_sequence(const struct sk_buff *skb) |
1
by Bastian Blank
Import upstream version 2.6.26 |
109 |
{
|
110 |
return secure_tcp_sequence_number(ip_hdr(skb)->daddr, |
|
111 |
ip_hdr(skb)->saddr, |
|
112 |
tcp_hdr(skb)->dest, |
|
113 |
tcp_hdr(skb)->source); |
|
114 |
}
|
|
115 |
||
116 |
int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp) |
|
117 |
{
|
|
118 |
const struct tcp_timewait_sock *tcptw = tcp_twsk(sktw); |
|
119 |
struct tcp_sock *tp = tcp_sk(sk); |
|
120 |
||
121 |
/* With PAWS, it is safe from the viewpoint
|
|
122 |
of data integrity. Even without PAWS it is safe provided sequence
|
|
123 |
spaces do not overlap i.e. at data rates <= 80Mbit/sec.
|
|
124 |
||
125 |
Actually, the idea is close to VJ's one, only timestamp cache is
|
|
126 |
held not per host, but per port pair and TW bucket is used as state
|
|
127 |
holder.
|
|
128 |
||
129 |
If TW bucket has been already destroyed we fall back to VJ's scheme
|
|
130 |
and use initial timestamp retrieved from peer table.
|
|
131 |
*/
|
|
132 |
if (tcptw->tw_ts_recent_stamp && |
|
133 |
(twp == NULL || (sysctl_tcp_tw_reuse && |
|
134 |
get_seconds() - tcptw->tw_ts_recent_stamp > 1))) { |
|
135 |
tp->write_seq = tcptw->tw_snd_nxt + 65535 + 2; |
|
136 |
if (tp->write_seq == 0) |
|
137 |
tp->write_seq = 1; |
|
138 |
tp->rx_opt.ts_recent = tcptw->tw_ts_recent; |
|
139 |
tp->rx_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp; |
|
140 |
sock_hold(sktw); |
|
141 |
return 1; |
|
142 |
}
|
|
143 |
||
144 |
return 0; |
|
145 |
}
|
|
146 |
EXPORT_SYMBOL_GPL(tcp_twsk_unique); |
|
147 |
||
148 |
/* This will initiate an outgoing connection. */
|
|
149 |
int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
|
150 |
{
|
|
151 |
struct sockaddr_in *usin = (struct sockaddr_in *)uaddr; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
152 |
struct inet_sock *inet = inet_sk(sk); |
153 |
struct tcp_sock *tp = tcp_sk(sk); |
|
1.2.17
by Ben Hutchings
Import upstream version 2.6.39~rc4 |
154 |
__be16 orig_sport, orig_dport; |
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
155 |
__be32 daddr, nexthop; |
156 |
struct flowi4 *fl4; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
157 |
struct rtable *rt; |
158 |
int err; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
159 |
struct ip_options_rcu *inet_opt; |
1
by Bastian Blank
Import upstream version 2.6.26 |
160 |
|
161 |
if (addr_len < sizeof(struct sockaddr_in)) |
|
162 |
return -EINVAL; |
|
163 |
||
164 |
if (usin->sin_family != AF_INET) |
|
165 |
return -EAFNOSUPPORT; |
|
166 |
||
167 |
nexthop = daddr = usin->sin_addr.s_addr; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
168 |
inet_opt = rcu_dereference_protected(inet->inet_opt, |
169 |
sock_owned_by_user(sk)); |
|
170 |
if (inet_opt && inet_opt->opt.srr) { |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
171 |
if (!daddr) |
172 |
return -EINVAL; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
173 |
nexthop = inet_opt->opt.faddr; |
1
by Bastian Blank
Import upstream version 2.6.26 |
174 |
}
|
175 |
||
1.2.17
by Ben Hutchings
Import upstream version 2.6.39~rc4 |
176 |
orig_sport = inet->inet_sport; |
177 |
orig_dport = usin->sin_port; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
178 |
fl4 = &inet->cork.fl.u.ip4; |
179 |
rt = ip_route_connect(fl4, nexthop, inet->inet_saddr, |
|
1.2.17
by Ben Hutchings
Import upstream version 2.6.39~rc4 |
180 |
RT_CONN_FLAGS(sk), sk->sk_bound_dev_if, |
181 |
IPPROTO_TCP, |
|
182 |
orig_sport, orig_dport, sk, true); |
|
183 |
if (IS_ERR(rt)) { |
|
184 |
err = PTR_ERR(rt); |
|
185 |
if (err == -ENETUNREACH) |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
186 |
IP_INC_STATS_BH(sock_net(sk), IPSTATS_MIB_OUTNOROUTES); |
1.2.17
by Ben Hutchings
Import upstream version 2.6.39~rc4 |
187 |
return err; |
1
by Bastian Blank
Import upstream version 2.6.26 |
188 |
}
|
189 |
||
190 |
if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) { |
|
191 |
ip_rt_put(rt); |
|
192 |
return -ENETUNREACH; |
|
193 |
}
|
|
194 |
||
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
195 |
if (!inet_opt || !inet_opt->opt.srr) |
196 |
daddr = fl4->daddr; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
197 |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
198 |
if (!inet->inet_saddr) |
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
199 |
inet->inet_saddr = fl4->saddr; |
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
200 |
inet->inet_rcv_saddr = inet->inet_saddr; |
1
by Bastian Blank
Import upstream version 2.6.26 |
201 |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
202 |
if (tp->rx_opt.ts_recent_stamp && inet->inet_daddr != daddr) { |
1
by Bastian Blank
Import upstream version 2.6.26 |
203 |
/* Reset inherited state */
|
204 |
tp->rx_opt.ts_recent = 0; |
|
205 |
tp->rx_opt.ts_recent_stamp = 0; |
|
206 |
tp->write_seq = 0; |
|
207 |
}
|
|
208 |
||
209 |
if (tcp_death_row.sysctl_tw_recycle && |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
210 |
!tp->rx_opt.ts_recent_stamp && fl4->daddr == daddr) { |
211 |
struct inet_peer *peer = rt_get_peer(rt, fl4->daddr); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
212 |
/*
|
213 |
* VJ's idea. We save last timestamp seen from
|
|
214 |
* the destination in peer table, when entering state
|
|
215 |
* TIME-WAIT * and initialize rx_opt.ts_recent from it,
|
|
216 |
* when trying new connection.
|
|
217 |
*/
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
218 |
if (peer) { |
219 |
inet_peer_refcheck(peer); |
|
220 |
if ((u32)get_seconds() - peer->tcp_ts_stamp <= TCP_PAWS_MSL) { |
|
221 |
tp->rx_opt.ts_recent_stamp = peer->tcp_ts_stamp; |
|
222 |
tp->rx_opt.ts_recent = peer->tcp_ts; |
|
223 |
}
|
|
1
by Bastian Blank
Import upstream version 2.6.26 |
224 |
}
|
225 |
}
|
|
226 |
||
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
227 |
inet->inet_dport = usin->sin_port; |
228 |
inet->inet_daddr = daddr; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
229 |
|
230 |
inet_csk(sk)->icsk_ext_hdr_len = 0; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
231 |
if (inet_opt) |
232 |
inet_csk(sk)->icsk_ext_hdr_len = inet_opt->opt.optlen; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
233 |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
234 |
tp->rx_opt.mss_clamp = TCP_MSS_DEFAULT; |
1
by Bastian Blank
Import upstream version 2.6.26 |
235 |
|
236 |
/* Socket identity is still unknown (sport may be zero).
|
|
237 |
* However we set state to SYN-SENT and not releasing socket
|
|
238 |
* lock select source port, enter ourselves into the hash tables and
|
|
239 |
* complete initialization after this.
|
|
240 |
*/
|
|
241 |
tcp_set_state(sk, TCP_SYN_SENT); |
|
242 |
err = inet_hash_connect(&tcp_death_row, sk); |
|
243 |
if (err) |
|
244 |
goto failure; |
|
245 |
||
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
246 |
rt = ip_route_newports(fl4, rt, orig_sport, orig_dport, |
1.2.17
by Ben Hutchings
Import upstream version 2.6.39~rc4 |
247 |
inet->inet_sport, inet->inet_dport, sk); |
248 |
if (IS_ERR(rt)) { |
|
249 |
err = PTR_ERR(rt); |
|
250 |
rt = NULL; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
251 |
goto failure; |
1.2.17
by Ben Hutchings
Import upstream version 2.6.39~rc4 |
252 |
}
|
1
by Bastian Blank
Import upstream version 2.6.26 |
253 |
/* OK, now commit destination to socket. */
|
254 |
sk->sk_gso_type = SKB_GSO_TCPV4; |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
255 |
sk_setup_caps(sk, &rt->dst); |
1
by Bastian Blank
Import upstream version 2.6.26 |
256 |
|
257 |
if (!tp->write_seq) |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
258 |
tp->write_seq = secure_tcp_sequence_number(inet->inet_saddr, |
259 |
inet->inet_daddr, |
|
260 |
inet->inet_sport, |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
261 |
usin->sin_port); |
262 |
||
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
263 |
inet->inet_id = tp->write_seq ^ jiffies; |
1
by Bastian Blank
Import upstream version 2.6.26 |
264 |
|
265 |
err = tcp_connect(sk); |
|
266 |
rt = NULL; |
|
267 |
if (err) |
|
268 |
goto failure; |
|
269 |
||
270 |
return 0; |
|
271 |
||
272 |
failure: |
|
273 |
/*
|
|
274 |
* This unhashes the socket and releases the local port,
|
|
275 |
* if necessary.
|
|
276 |
*/
|
|
277 |
tcp_set_state(sk, TCP_CLOSE); |
|
278 |
ip_rt_put(rt); |
|
279 |
sk->sk_route_caps = 0; |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
280 |
inet->inet_dport = 0; |
1
by Bastian Blank
Import upstream version 2.6.26 |
281 |
return err; |
282 |
}
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
283 |
EXPORT_SYMBOL(tcp_v4_connect); |
1
by Bastian Blank
Import upstream version 2.6.26 |
284 |
|
285 |
/*
|
|
286 |
* This routine does path mtu discovery as defined in RFC1191.
|
|
287 |
*/
|
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
288 |
static void do_pmtu_discovery(struct sock *sk, const struct iphdr *iph, u32 mtu) |
1
by Bastian Blank
Import upstream version 2.6.26 |
289 |
{
|
290 |
struct dst_entry *dst; |
|
291 |
struct inet_sock *inet = inet_sk(sk); |
|
292 |
||
293 |
/* We are not interested in TCP_LISTEN and open_requests (SYN-ACKs
|
|
294 |
* send out by Linux are always <576bytes so they should go through
|
|
295 |
* unfragmented).
|
|
296 |
*/
|
|
297 |
if (sk->sk_state == TCP_LISTEN) |
|
298 |
return; |
|
299 |
||
300 |
/* We don't check in the destentry if pmtu discovery is forbidden
|
|
301 |
* on this route. We just assume that no packet_to_big packets
|
|
302 |
* are send back when pmtu discovery is not active.
|
|
303 |
* There is a small race when the user changes this flag in the
|
|
304 |
* route, but I think that's acceptable.
|
|
305 |
*/
|
|
306 |
if ((dst = __sk_dst_check(sk, 0)) == NULL) |
|
307 |
return; |
|
308 |
||
309 |
dst->ops->update_pmtu(dst, mtu); |
|
310 |
||
311 |
/* Something is about to be wrong... Remember soft error
|
|
312 |
* for the case, if this connection will not able to recover.
|
|
313 |
*/
|
|
314 |
if (mtu < dst_mtu(dst) && ip_dont_fragment(sk, dst)) |
|
315 |
sk->sk_err_soft = EMSGSIZE; |
|
316 |
||
317 |
mtu = dst_mtu(dst); |
|
318 |
||
319 |
if (inet->pmtudisc != IP_PMTUDISC_DONT && |
|
320 |
inet_csk(sk)->icsk_pmtu_cookie > mtu) { |
|
321 |
tcp_sync_mss(sk, mtu); |
|
322 |
||
323 |
/* Resend the TCP packet because it's
|
|
324 |
* clear that the old packet has been
|
|
325 |
* dropped. This is the new "fast" path mtu
|
|
326 |
* discovery.
|
|
327 |
*/
|
|
328 |
tcp_simple_retransmit(sk); |
|
329 |
} /* else let the usual retransmit timer handle it */ |
|
330 |
}
|
|
331 |
||
332 |
/*
|
|
333 |
* This routine is called by the ICMP module when it gets some
|
|
334 |
* sort of error condition. If err < 0 then the socket should
|
|
335 |
* be closed and the error returned to the user. If err > 0
|
|
336 |
* it's just the icmp type << 8 | icmp code. After adjustment
|
|
337 |
* header points to the first 8 bytes of the tcp header. We need
|
|
338 |
* to find the appropriate port.
|
|
339 |
*
|
|
340 |
* The locking strategy used here is very "optimistic". When
|
|
341 |
* someone else accesses the socket the ICMP is just dropped
|
|
342 |
* and for some paths there is no check at all.
|
|
343 |
* A more general error queue to queue errors for later handling
|
|
344 |
* is probably better.
|
|
345 |
*
|
|
346 |
*/
|
|
347 |
||
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
348 |
void tcp_v4_err(struct sk_buff *icmp_skb, u32 info) |
1
by Bastian Blank
Import upstream version 2.6.26 |
349 |
{
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
350 |
const struct iphdr *iph = (const struct iphdr *)icmp_skb->data; |
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
351 |
struct tcphdr *th = (struct tcphdr *)(icmp_skb->data + (iph->ihl << 2)); |
352 |
struct inet_connection_sock *icsk; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
353 |
struct tcp_sock *tp; |
354 |
struct inet_sock *inet; |
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
355 |
const int type = icmp_hdr(icmp_skb)->type; |
356 |
const int code = icmp_hdr(icmp_skb)->code; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
357 |
struct sock *sk; |
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
358 |
struct sk_buff *skb; |
1
by Bastian Blank
Import upstream version 2.6.26 |
359 |
__u32 seq; |
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
360 |
__u32 remaining; |
1
by Bastian Blank
Import upstream version 2.6.26 |
361 |
int err; |
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
362 |
struct net *net = dev_net(icmp_skb->dev); |
1
by Bastian Blank
Import upstream version 2.6.26 |
363 |
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
364 |
if (icmp_skb->len < (iph->ihl << 2) + 8) { |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
365 |
ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
366 |
return; |
367 |
}
|
|
368 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
369 |
sk = inet_lookup(net, &tcp_hashinfo, iph->daddr, th->dest, |
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
370 |
iph->saddr, th->source, inet_iif(icmp_skb)); |
1
by Bastian Blank
Import upstream version 2.6.26 |
371 |
if (!sk) { |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
372 |
ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
373 |
return; |
374 |
}
|
|
375 |
if (sk->sk_state == TCP_TIME_WAIT) { |
|
376 |
inet_twsk_put(inet_twsk(sk)); |
|
377 |
return; |
|
378 |
}
|
|
379 |
||
380 |
bh_lock_sock(sk); |
|
381 |
/* If too many ICMPs get dropped on busy
|
|
382 |
* servers this needs to be solved differently.
|
|
383 |
*/
|
|
384 |
if (sock_owned_by_user(sk)) |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
385 |
NET_INC_STATS_BH(net, LINUX_MIB_LOCKDROPPEDICMPS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
386 |
|
387 |
if (sk->sk_state == TCP_CLOSE) |
|
388 |
goto out; |
|
389 |
||
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
390 |
if (unlikely(iph->ttl < inet_sk(sk)->min_ttl)) { |
391 |
NET_INC_STATS_BH(net, LINUX_MIB_TCPMINTTLDROP); |
|
392 |
goto out; |
|
393 |
}
|
|
394 |
||
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
395 |
icsk = inet_csk(sk); |
1
by Bastian Blank
Import upstream version 2.6.26 |
396 |
tp = tcp_sk(sk); |
397 |
seq = ntohl(th->seq); |
|
398 |
if (sk->sk_state != TCP_LISTEN && |
|
399 |
!between(seq, tp->snd_una, tp->snd_nxt)) { |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
400 |
NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
401 |
goto out; |
402 |
}
|
|
403 |
||
404 |
switch (type) { |
|
405 |
case ICMP_SOURCE_QUENCH: |
|
406 |
/* Just silently ignore these. */
|
|
407 |
goto out; |
|
408 |
case ICMP_PARAMETERPROB: |
|
409 |
err = EPROTO; |
|
410 |
break; |
|
411 |
case ICMP_DEST_UNREACH: |
|
412 |
if (code > NR_ICMP_UNREACH) |
|
413 |
goto out; |
|
414 |
||
415 |
if (code == ICMP_FRAG_NEEDED) { /* PMTU discovery (RFC1191) */ |
|
416 |
if (!sock_owned_by_user(sk)) |
|
417 |
do_pmtu_discovery(sk, iph, info); |
|
418 |
goto out; |
|
419 |
}
|
|
420 |
||
421 |
err = icmp_err_convert[code].errno; |
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
422 |
/* check if icmp_skb allows revert of backoff
|
423 |
* (see draft-zimmermann-tcp-lcd) */
|
|
424 |
if (code != ICMP_NET_UNREACH && code != ICMP_HOST_UNREACH) |
|
425 |
break; |
|
426 |
if (seq != tp->snd_una || !icsk->icsk_retransmits || |
|
427 |
!icsk->icsk_backoff) |
|
428 |
break; |
|
429 |
||
1.2.10
by Ben Hutchings
Import upstream version 2.6.37~rc4 |
430 |
if (sock_owned_by_user(sk)) |
431 |
break; |
|
432 |
||
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
433 |
icsk->icsk_backoff--; |
1.2.27
by Ben Hutchings
Import upstream version 3.1.0~rc4 |
434 |
inet_csk(sk)->icsk_rto = (tp->srtt ? __tcp_set_rto(tp) : |
435 |
TCP_TIMEOUT_INIT) << icsk->icsk_backoff; |
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
436 |
tcp_bound_rto(sk); |
437 |
||
438 |
skb = tcp_write_queue_head(sk); |
|
439 |
BUG_ON(!skb); |
|
440 |
||
441 |
remaining = icsk->icsk_rto - min(icsk->icsk_rto, |
|
442 |
tcp_time_stamp - TCP_SKB_CB(skb)->when); |
|
443 |
||
444 |
if (remaining) { |
|
445 |
inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, |
|
446 |
remaining, TCP_RTO_MAX); |
|
447 |
} else { |
|
448 |
/* RTO revert clocked out retransmission.
|
|
449 |
* Will retransmit now */
|
|
450 |
tcp_retransmit_timer(sk); |
|
451 |
}
|
|
452 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
453 |
break; |
454 |
case ICMP_TIME_EXCEEDED: |
|
455 |
err = EHOSTUNREACH; |
|
456 |
break; |
|
457 |
default: |
|
458 |
goto out; |
|
459 |
}
|
|
460 |
||
461 |
switch (sk->sk_state) { |
|
462 |
struct request_sock *req, **prev; |
|
463 |
case TCP_LISTEN: |
|
464 |
if (sock_owned_by_user(sk)) |
|
465 |
goto out; |
|
466 |
||
467 |
req = inet_csk_search_req(sk, &prev, th->dest, |
|
468 |
iph->daddr, iph->saddr); |
|
469 |
if (!req) |
|
470 |
goto out; |
|
471 |
||
472 |
/* ICMPs are not backlogged, hence we cannot get
|
|
473 |
an established socket here.
|
|
474 |
*/
|
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
475 |
WARN_ON(req->sk); |
1
by Bastian Blank
Import upstream version 2.6.26 |
476 |
|
477 |
if (seq != tcp_rsk(req)->snt_isn) { |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
478 |
NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
479 |
goto out; |
480 |
}
|
|
481 |
||
482 |
/*
|
|
483 |
* Still in SYN_RECV, just remove it silently.
|
|
484 |
* There is no good way to pass the error to the newly
|
|
485 |
* created socket, and POSIX does not want network
|
|
486 |
* errors returned from accept().
|
|
487 |
*/
|
|
488 |
inet_csk_reqsk_queue_drop(sk, req, prev); |
|
489 |
goto out; |
|
490 |
||
491 |
case TCP_SYN_SENT: |
|
492 |
case TCP_SYN_RECV: /* Cannot happen. |
|
493 |
It can f.e. if SYNs crossed.
|
|
494 |
*/
|
|
495 |
if (!sock_owned_by_user(sk)) { |
|
496 |
sk->sk_err = err; |
|
497 |
||
498 |
sk->sk_error_report(sk); |
|
499 |
||
500 |
tcp_done(sk); |
|
501 |
} else { |
|
502 |
sk->sk_err_soft = err; |
|
503 |
}
|
|
504 |
goto out; |
|
505 |
}
|
|
506 |
||
507 |
/* If we've already connected we will keep trying
|
|
508 |
* until we time out, or the user gives up.
|
|
509 |
*
|
|
510 |
* rfc1122 4.2.3.9 allows to consider as hard errors
|
|
511 |
* only PROTO_UNREACH and PORT_UNREACH (well, FRAG_FAILED too,
|
|
512 |
* but it is obsoleted by pmtu discovery).
|
|
513 |
*
|
|
514 |
* Note, that in modern internet, where routing is unreliable
|
|
515 |
* and in each dark corner broken firewalls sit, sending random
|
|
516 |
* errors ordered by their masters even this two messages finally lose
|
|
517 |
* their original sense (even Linux sends invalid PORT_UNREACHs)
|
|
518 |
*
|
|
519 |
* Now we are in compliance with RFCs.
|
|
520 |
* --ANK (980905)
|
|
521 |
*/
|
|
522 |
||
523 |
inet = inet_sk(sk); |
|
524 |
if (!sock_owned_by_user(sk) && inet->recverr) { |
|
525 |
sk->sk_err = err; |
|
526 |
sk->sk_error_report(sk); |
|
527 |
} else { /* Only an error on timeout */ |
|
528 |
sk->sk_err_soft = err; |
|
529 |
}
|
|
530 |
||
531 |
out: |
|
532 |
bh_unlock_sock(sk); |
|
533 |
sock_put(sk); |
|
534 |
}
|
|
535 |
||
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
536 |
static void __tcp_v4_send_check(struct sk_buff *skb, |
537 |
__be32 saddr, __be32 daddr) |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
538 |
{
|
539 |
struct tcphdr *th = tcp_hdr(skb); |
|
540 |
||
541 |
if (skb->ip_summed == CHECKSUM_PARTIAL) { |
|
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
542 |
th->check = ~tcp_v4_check(skb->len, saddr, daddr, 0); |
1
by Bastian Blank
Import upstream version 2.6.26 |
543 |
skb->csum_start = skb_transport_header(skb) - skb->head; |
544 |
skb->csum_offset = offsetof(struct tcphdr, check); |
|
545 |
} else { |
|
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
546 |
th->check = tcp_v4_check(skb->len, saddr, daddr, |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
547 |
csum_partial(th, |
1
by Bastian Blank
Import upstream version 2.6.26 |
548 |
th->doff << 2, |
549 |
skb->csum)); |
|
550 |
}
|
|
551 |
}
|
|
552 |
||
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
553 |
/* This routine computes an IPv4 TCP checksum. */
|
554 |
void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb) |
|
555 |
{
|
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
556 |
const struct inet_sock *inet = inet_sk(sk); |
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
557 |
|
558 |
__tcp_v4_send_check(skb, inet->inet_saddr, inet->inet_daddr); |
|
559 |
}
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
560 |
EXPORT_SYMBOL(tcp_v4_send_check); |
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
561 |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
562 |
int tcp_v4_gso_send_check(struct sk_buff *skb) |
563 |
{
|
|
564 |
const struct iphdr *iph; |
|
565 |
struct tcphdr *th; |
|
566 |
||
567 |
if (!pskb_may_pull(skb, sizeof(*th))) |
|
568 |
return -EINVAL; |
|
569 |
||
570 |
iph = ip_hdr(skb); |
|
571 |
th = tcp_hdr(skb); |
|
572 |
||
573 |
th->check = 0; |
|
574 |
skb->ip_summed = CHECKSUM_PARTIAL; |
|
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
575 |
__tcp_v4_send_check(skb, iph->saddr, iph->daddr); |
1
by Bastian Blank
Import upstream version 2.6.26 |
576 |
return 0; |
577 |
}
|
|
578 |
||
579 |
/*
|
|
580 |
* This routine will send an RST to the other tcp.
|
|
581 |
*
|
|
582 |
* Someone asks: why I NEVER use socket parameters (TOS, TTL etc.)
|
|
583 |
* for reset.
|
|
584 |
* Answer: if a packet caused RST, it is not for a socket
|
|
585 |
* existing in our system, if it is matched to a socket,
|
|
586 |
* it is just duplicate segment or bug in other side's TCP.
|
|
587 |
* So that we build reply only basing on parameters
|
|
588 |
* arrived with segment.
|
|
589 |
* Exception: precedence violation. We do not implement it in any case.
|
|
590 |
*/
|
|
591 |
||
592 |
static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb) |
|
593 |
{
|
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
594 |
const struct tcphdr *th = tcp_hdr(skb); |
1
by Bastian Blank
Import upstream version 2.6.26 |
595 |
struct { |
596 |
struct tcphdr th; |
|
597 |
#ifdef CONFIG_TCP_MD5SIG
|
|
598 |
__be32 opt[(TCPOLEN_MD5SIG_ALIGNED >> 2)]; |
|
599 |
#endif
|
|
600 |
} rep; |
|
601 |
struct ip_reply_arg arg; |
|
602 |
#ifdef CONFIG_TCP_MD5SIG
|
|
603 |
struct tcp_md5sig_key *key; |
|
604 |
#endif
|
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
605 |
struct net *net; |
1
by Bastian Blank
Import upstream version 2.6.26 |
606 |
|
607 |
/* Never send a reset in response to a reset. */
|
|
608 |
if (th->rst) |
|
609 |
return; |
|
610 |
||
1.1.4
by maximilian attems
Import upstream version 2.6.31 |
611 |
if (skb_rtable(skb)->rt_type != RTN_LOCAL) |
1
by Bastian Blank
Import upstream version 2.6.26 |
612 |
return; |
613 |
||
614 |
/* Swap the send and the receive. */
|
|
615 |
memset(&rep, 0, sizeof(rep)); |
|
616 |
rep.th.dest = th->source; |
|
617 |
rep.th.source = th->dest; |
|
618 |
rep.th.doff = sizeof(struct tcphdr) / 4; |
|
619 |
rep.th.rst = 1; |
|
620 |
||
621 |
if (th->ack) { |
|
622 |
rep.th.seq = th->ack_seq; |
|
623 |
} else { |
|
624 |
rep.th.ack = 1; |
|
625 |
rep.th.ack_seq = htonl(ntohl(th->seq) + th->syn + th->fin + |
|
626 |
skb->len - (th->doff << 2)); |
|
627 |
}
|
|
628 |
||
629 |
memset(&arg, 0, sizeof(arg)); |
|
630 |
arg.iov[0].iov_base = (unsigned char *)&rep; |
|
631 |
arg.iov[0].iov_len = sizeof(rep.th); |
|
632 |
||
633 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1.3.11
by Bastian Blank
Import upstream version 3.2.4 |
634 |
key = sk ? tcp_v4_md5_do_lookup(sk, ip_hdr(skb)->saddr) : NULL; |
1
by Bastian Blank
Import upstream version 2.6.26 |
635 |
if (key) { |
636 |
rep.opt[0] = htonl((TCPOPT_NOP << 24) | |
|
637 |
(TCPOPT_NOP << 16) | |
|
638 |
(TCPOPT_MD5SIG << 8) | |
|
639 |
TCPOLEN_MD5SIG); |
|
640 |
/* Update length and the length the header thinks exists */
|
|
641 |
arg.iov[0].iov_len += TCPOLEN_MD5SIG_ALIGNED; |
|
642 |
rep.th.doff = arg.iov[0].iov_len / 4; |
|
643 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
644 |
tcp_v4_md5_hash_hdr((__u8 *) &rep.opt[1], |
645 |
key, ip_hdr(skb)->saddr, |
|
646 |
ip_hdr(skb)->daddr, &rep.th); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
647 |
}
|
648 |
#endif
|
|
649 |
arg.csum = csum_tcpudp_nofold(ip_hdr(skb)->daddr, |
|
650 |
ip_hdr(skb)->saddr, /* XXX */ |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
651 |
arg.iov[0].iov_len, IPPROTO_TCP, 0); |
1
by Bastian Blank
Import upstream version 2.6.26 |
652 |
arg.csumoffset = offsetof(struct tcphdr, check) / 2; |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
653 |
arg.flags = (sk && inet_sk(sk)->transparent) ? IP_REPLY_ARG_NOSRCCHECK : 0; |
1.3.14
by Ben Hutchings
Import upstream version 3.2.9 |
654 |
/* When socket is gone, all binding information is lost.
|
655 |
* routing might fail in this case. using iif for oif to
|
|
656 |
* make sure we can deliver it
|
|
657 |
*/
|
|
658 |
arg.bound_dev_if = sk ? sk->sk_bound_dev_if : inet_iif(skb); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
659 |
|
1.1.4
by maximilian attems
Import upstream version 2.6.31 |
660 |
net = dev_net(skb_dst(skb)->dev); |
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
661 |
arg.tos = ip_hdr(skb)->tos; |
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
662 |
ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr, |
1
by Bastian Blank
Import upstream version 2.6.26 |
663 |
&arg, arg.iov[0].iov_len); |
664 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
665 |
TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); |
666 |
TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
667 |
}
|
668 |
||
669 |
/* The code following below sending ACKs in SYN-RECV and TIME-WAIT states
|
|
670 |
outside socket context is ugly, certainly. What can I do?
|
|
671 |
*/
|
|
672 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
673 |
static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack, |
674 |
u32 win, u32 ts, int oif, |
|
675 |
struct tcp_md5sig_key *key, |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
676 |
int reply_flags, u8 tos) |
1
by Bastian Blank
Import upstream version 2.6.26 |
677 |
{
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
678 |
const struct tcphdr *th = tcp_hdr(skb); |
1
by Bastian Blank
Import upstream version 2.6.26 |
679 |
struct { |
680 |
struct tcphdr th; |
|
681 |
__be32 opt[(TCPOLEN_TSTAMP_ALIGNED >> 2) |
|
682 |
#ifdef CONFIG_TCP_MD5SIG
|
|
683 |
+ (TCPOLEN_MD5SIG_ALIGNED >> 2) |
|
684 |
#endif
|
|
685 |
];
|
|
686 |
} rep; |
|
687 |
struct ip_reply_arg arg; |
|
1.1.4
by maximilian attems
Import upstream version 2.6.31 |
688 |
struct net *net = dev_net(skb_dst(skb)->dev); |
1
by Bastian Blank
Import upstream version 2.6.26 |
689 |
|
690 |
memset(&rep.th, 0, sizeof(struct tcphdr)); |
|
691 |
memset(&arg, 0, sizeof(arg)); |
|
692 |
||
693 |
arg.iov[0].iov_base = (unsigned char *)&rep; |
|
694 |
arg.iov[0].iov_len = sizeof(rep.th); |
|
695 |
if (ts) { |
|
696 |
rep.opt[0] = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | |
|
697 |
(TCPOPT_TIMESTAMP << 8) | |
|
698 |
TCPOLEN_TIMESTAMP); |
|
699 |
rep.opt[1] = htonl(tcp_time_stamp); |
|
700 |
rep.opt[2] = htonl(ts); |
|
701 |
arg.iov[0].iov_len += TCPOLEN_TSTAMP_ALIGNED; |
|
702 |
}
|
|
703 |
||
704 |
/* Swap the send and the receive. */
|
|
705 |
rep.th.dest = th->source; |
|
706 |
rep.th.source = th->dest; |
|
707 |
rep.th.doff = arg.iov[0].iov_len / 4; |
|
708 |
rep.th.seq = htonl(seq); |
|
709 |
rep.th.ack_seq = htonl(ack); |
|
710 |
rep.th.ack = 1; |
|
711 |
rep.th.window = htons(win); |
|
712 |
||
713 |
#ifdef CONFIG_TCP_MD5SIG
|
|
714 |
if (key) { |
|
715 |
int offset = (ts) ? 3 : 0; |
|
716 |
||
717 |
rep.opt[offset++] = htonl((TCPOPT_NOP << 24) | |
|
718 |
(TCPOPT_NOP << 16) | |
|
719 |
(TCPOPT_MD5SIG << 8) | |
|
720 |
TCPOLEN_MD5SIG); |
|
721 |
arg.iov[0].iov_len += TCPOLEN_MD5SIG_ALIGNED; |
|
722 |
rep.th.doff = arg.iov[0].iov_len/4; |
|
723 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
724 |
tcp_v4_md5_hash_hdr((__u8 *) &rep.opt[offset], |
725 |
key, ip_hdr(skb)->saddr, |
|
726 |
ip_hdr(skb)->daddr, &rep.th); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
727 |
}
|
728 |
#endif
|
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
729 |
arg.flags = reply_flags; |
1
by Bastian Blank
Import upstream version 2.6.26 |
730 |
arg.csum = csum_tcpudp_nofold(ip_hdr(skb)->daddr, |
731 |
ip_hdr(skb)->saddr, /* XXX */ |
|
732 |
arg.iov[0].iov_len, IPPROTO_TCP, 0); |
|
733 |
arg.csumoffset = offsetof(struct tcphdr, check) / 2; |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
734 |
if (oif) |
735 |
arg.bound_dev_if = oif; |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
736 |
arg.tos = tos; |
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
737 |
ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr, |
1
by Bastian Blank
Import upstream version 2.6.26 |
738 |
&arg, arg.iov[0].iov_len); |
739 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
740 |
TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
741 |
}
|
742 |
||
743 |
static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb) |
|
744 |
{
|
|
745 |
struct inet_timewait_sock *tw = inet_twsk(sk); |
|
746 |
struct tcp_timewait_sock *tcptw = tcp_twsk(sk); |
|
747 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
748 |
tcp_v4_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt, |
1
by Bastian Blank
Import upstream version 2.6.26 |
749 |
tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale, |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
750 |
tcptw->tw_ts_recent, |
751 |
tw->tw_bound_dev_if, |
|
752 |
tcp_twsk_md5_key(tcptw), |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
753 |
tw->tw_transparent ? IP_REPLY_ARG_NOSRCCHECK : 0, |
754 |
tw->tw_tos |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
755 |
);
|
1
by Bastian Blank
Import upstream version 2.6.26 |
756 |
|
757 |
inet_twsk_put(tw); |
|
758 |
}
|
|
759 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
760 |
static void tcp_v4_reqsk_send_ack(struct sock *sk, struct sk_buff *skb, |
1
by Bastian Blank
Import upstream version 2.6.26 |
761 |
struct request_sock *req) |
762 |
{
|
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
763 |
tcp_v4_send_ack(skb, tcp_rsk(req)->snt_isn + 1, |
1
by Bastian Blank
Import upstream version 2.6.26 |
764 |
tcp_rsk(req)->rcv_isn + 1, req->rcv_wnd, |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
765 |
req->ts_recent, |
766 |
0, |
|
767 |
tcp_v4_md5_do_lookup(sk, ip_hdr(skb)->daddr), |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
768 |
inet_rsk(req)->no_srccheck ? IP_REPLY_ARG_NOSRCCHECK : 0, |
769 |
ip_hdr(skb)->tos); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
770 |
}
|
771 |
||
772 |
/*
|
|
773 |
* Send a SYN-ACK after having received a SYN.
|
|
774 |
* This still operates on a request_sock only, not on a big
|
|
775 |
* socket.
|
|
776 |
*/
|
|
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
777 |
static int tcp_v4_send_synack(struct sock *sk, struct dst_entry *dst, |
778 |
struct request_sock *req, |
|
779 |
struct request_values *rvp) |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
780 |
{
|
781 |
const struct inet_request_sock *ireq = inet_rsk(req); |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
782 |
struct flowi4 fl4; |
1
by Bastian Blank
Import upstream version 2.6.26 |
783 |
int err = -1; |
784 |
struct sk_buff * skb; |
|
785 |
||
786 |
/* First, grab a route. */
|
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
787 |
if (!dst && (dst = inet_csk_route_req(sk, &fl4, req)) == NULL) |
1
by Bastian Blank
Import upstream version 2.6.26 |
788 |
return -1; |
789 |
||
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
790 |
skb = tcp_make_synack(sk, dst, req, rvp); |
1
by Bastian Blank
Import upstream version 2.6.26 |
791 |
|
792 |
if (skb) { |
|
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
793 |
__tcp_v4_send_check(skb, ireq->loc_addr, ireq->rmt_addr); |
1
by Bastian Blank
Import upstream version 2.6.26 |
794 |
|
795 |
err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr, |
|
796 |
ireq->rmt_addr, |
|
797 |
ireq->opt); |
|
798 |
err = net_xmit_eval(err); |
|
799 |
}
|
|
800 |
||
801 |
dst_release(dst); |
|
802 |
return err; |
|
803 |
}
|
|
804 |
||
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
805 |
static int tcp_v4_rtx_synack(struct sock *sk, struct request_sock *req, |
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
806 |
struct request_values *rvp) |
1
by Bastian Blank
Import upstream version 2.6.26 |
807 |
{
|
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
808 |
TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS); |
809 |
return tcp_v4_send_synack(sk, NULL, req, rvp); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
810 |
}
|
811 |
||
812 |
/*
|
|
813 |
* IPv4 request_sock destructor.
|
|
814 |
*/
|
|
815 |
static void tcp_v4_reqsk_destructor(struct request_sock *req) |
|
816 |
{
|
|
817 |
kfree(inet_rsk(req)->opt); |
|
818 |
}
|
|
819 |
||
1.2.29
by Ben Hutchings
Import upstream version 3.1.0~rc7 |
820 |
/*
|
821 |
* Return 1 if a syncookie should be sent
|
|
822 |
*/
|
|
823 |
int tcp_syn_flood_action(struct sock *sk, |
|
824 |
const struct sk_buff *skb, |
|
825 |
const char *proto) |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
826 |
{
|
1.2.29
by Ben Hutchings
Import upstream version 3.1.0~rc7 |
827 |
const char *msg = "Dropping request"; |
828 |
int want_cookie = 0; |
|
829 |
struct listen_sock *lopt; |
|
830 |
||
831 |
||
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
832 |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
833 |
#ifdef CONFIG_SYN_COOKIES
|
1.2.29
by Ben Hutchings
Import upstream version 3.1.0~rc7 |
834 |
if (sysctl_tcp_syncookies) { |
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
835 |
msg = "Sending cookies"; |
1.2.29
by Ben Hutchings
Import upstream version 3.1.0~rc7 |
836 |
want_cookie = 1; |
837 |
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPREQQFULLDOCOOKIES); |
|
838 |
} else |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
839 |
#endif
|
1.2.29
by Ben Hutchings
Import upstream version 3.1.0~rc7 |
840 |
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPREQQFULLDROP); |
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
841 |
|
1.2.29
by Ben Hutchings
Import upstream version 3.1.0~rc7 |
842 |
lopt = inet_csk(sk)->icsk_accept_queue.listen_opt; |
843 |
if (!lopt->synflood_warned) { |
|
844 |
lopt->synflood_warned = 1; |
|
845 |
pr_info("%s: Possible SYN flooding on port %d. %s. " |
|
846 |
" Check SNMP counters.\n", |
|
847 |
proto, ntohs(tcp_hdr(skb)->dest), msg); |
|
848 |
}
|
|
849 |
return want_cookie; |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
850 |
}
|
1.2.29
by Ben Hutchings
Import upstream version 3.1.0~rc7 |
851 |
EXPORT_SYMBOL(tcp_syn_flood_action); |
1
by Bastian Blank
Import upstream version 2.6.26 |
852 |
|
853 |
/*
|
|
854 |
* Save and compile IPv4 options into the request_sock if needed.
|
|
855 |
*/
|
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
856 |
static struct ip_options_rcu *tcp_v4_save_options(struct sock *sk, |
857 |
struct sk_buff *skb) |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
858 |
{
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
859 |
const struct ip_options *opt = &(IPCB(skb)->opt); |
860 |
struct ip_options_rcu *dopt = NULL; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
861 |
|
862 |
if (opt && opt->optlen) { |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
863 |
int opt_size = sizeof(*dopt) + opt->optlen; |
864 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
865 |
dopt = kmalloc(opt_size, GFP_ATOMIC); |
866 |
if (dopt) { |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
867 |
if (ip_options_echo(&dopt->opt, skb)) { |
1
by Bastian Blank
Import upstream version 2.6.26 |
868 |
kfree(dopt); |
869 |
dopt = NULL; |
|
870 |
}
|
|
871 |
}
|
|
872 |
}
|
|
873 |
return dopt; |
|
874 |
}
|
|
875 |
||
876 |
#ifdef CONFIG_TCP_MD5SIG
|
|
877 |
/*
|
|
878 |
* RFC2385 MD5 checksumming requires a mapping of
|
|
879 |
* IP address->MD5 Key.
|
|
880 |
* We need to maintain these in the sk structure.
|
|
881 |
*/
|
|
882 |
||
883 |
/* Find the Key structure for an address. */
|
|
884 |
static struct tcp_md5sig_key * |
|
885 |
tcp_v4_md5_do_lookup(struct sock *sk, __be32 addr) |
|
886 |
{
|
|
887 |
struct tcp_sock *tp = tcp_sk(sk); |
|
888 |
int i; |
|
889 |
||
890 |
if (!tp->md5sig_info || !tp->md5sig_info->entries4) |
|
891 |
return NULL; |
|
892 |
for (i = 0; i < tp->md5sig_info->entries4; i++) { |
|
893 |
if (tp->md5sig_info->keys4[i].addr == addr) |
|
894 |
return &tp->md5sig_info->keys4[i].base; |
|
895 |
}
|
|
896 |
return NULL; |
|
897 |
}
|
|
898 |
||
899 |
struct tcp_md5sig_key *tcp_v4_md5_lookup(struct sock *sk, |
|
900 |
struct sock *addr_sk) |
|
901 |
{
|
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
902 |
return tcp_v4_md5_do_lookup(sk, inet_sk(addr_sk)->inet_daddr); |
1
by Bastian Blank
Import upstream version 2.6.26 |
903 |
}
|
904 |
EXPORT_SYMBOL(tcp_v4_md5_lookup); |
|
905 |
||
906 |
static struct tcp_md5sig_key *tcp_v4_reqsk_md5_lookup(struct sock *sk, |
|
907 |
struct request_sock *req) |
|
908 |
{
|
|
909 |
return tcp_v4_md5_do_lookup(sk, inet_rsk(req)->rmt_addr); |
|
910 |
}
|
|
911 |
||
912 |
/* This can be called on a newly created socket, from other files */
|
|
913 |
int tcp_v4_md5_do_add(struct sock *sk, __be32 addr, |
|
914 |
u8 *newkey, u8 newkeylen) |
|
915 |
{
|
|
916 |
/* Add Key to the list */
|
|
917 |
struct tcp_md5sig_key *key; |
|
918 |
struct tcp_sock *tp = tcp_sk(sk); |
|
919 |
struct tcp4_md5sig_key *keys; |
|
920 |
||
921 |
key = tcp_v4_md5_do_lookup(sk, addr); |
|
922 |
if (key) { |
|
923 |
/* Pre-existing entry - just update that one. */
|
|
924 |
kfree(key->key); |
|
925 |
key->key = newkey; |
|
926 |
key->keylen = newkeylen; |
|
927 |
} else { |
|
928 |
struct tcp_md5sig_info *md5sig; |
|
929 |
||
930 |
if (!tp->md5sig_info) { |
|
931 |
tp->md5sig_info = kzalloc(sizeof(*tp->md5sig_info), |
|
932 |
GFP_ATOMIC); |
|
933 |
if (!tp->md5sig_info) { |
|
934 |
kfree(newkey); |
|
935 |
return -ENOMEM; |
|
936 |
}
|
|
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
937 |
sk_nocaps_add(sk, NETIF_F_GSO_MASK); |
1
by Bastian Blank
Import upstream version 2.6.26 |
938 |
}
|
1.2.30
by Bastian Blank
Import upstream version 3.1.0 |
939 |
|
940 |
md5sig = tp->md5sig_info; |
|
941 |
if (md5sig->entries4 == 0 && |
|
942 |
tcp_alloc_md5sig_pool(sk) == NULL) { |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
943 |
kfree(newkey); |
944 |
return -ENOMEM; |
|
945 |
}
|
|
946 |
||
947 |
if (md5sig->alloced4 == md5sig->entries4) { |
|
948 |
keys = kmalloc((sizeof(*keys) * |
|
949 |
(md5sig->entries4 + 1)), GFP_ATOMIC); |
|
950 |
if (!keys) { |
|
951 |
kfree(newkey); |
|
1.2.30
by Bastian Blank
Import upstream version 3.1.0 |
952 |
if (md5sig->entries4 == 0) |
953 |
tcp_free_md5sig_pool(); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
954 |
return -ENOMEM; |
955 |
}
|
|
956 |
||
957 |
if (md5sig->entries4) |
|
958 |
memcpy(keys, md5sig->keys4, |
|
959 |
sizeof(*keys) * md5sig->entries4); |
|
960 |
||
961 |
/* Free old key list, and reference new one */
|
|
962 |
kfree(md5sig->keys4); |
|
963 |
md5sig->keys4 = keys; |
|
964 |
md5sig->alloced4++; |
|
965 |
}
|
|
966 |
md5sig->entries4++; |
|
967 |
md5sig->keys4[md5sig->entries4 - 1].addr = addr; |
|
968 |
md5sig->keys4[md5sig->entries4 - 1].base.key = newkey; |
|
969 |
md5sig->keys4[md5sig->entries4 - 1].base.keylen = newkeylen; |
|
970 |
}
|
|
971 |
return 0; |
|
972 |
}
|
|
973 |
EXPORT_SYMBOL(tcp_v4_md5_do_add); |
|
974 |
||
975 |
static int tcp_v4_md5_add_func(struct sock *sk, struct sock *addr_sk, |
|
976 |
u8 *newkey, u8 newkeylen) |
|
977 |
{
|
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
978 |
return tcp_v4_md5_do_add(sk, inet_sk(addr_sk)->inet_daddr, |
1
by Bastian Blank
Import upstream version 2.6.26 |
979 |
newkey, newkeylen); |
980 |
}
|
|
981 |
||
982 |
int tcp_v4_md5_do_del(struct sock *sk, __be32 addr) |
|
983 |
{
|
|
984 |
struct tcp_sock *tp = tcp_sk(sk); |
|
985 |
int i; |
|
986 |
||
987 |
for (i = 0; i < tp->md5sig_info->entries4; i++) { |
|
988 |
if (tp->md5sig_info->keys4[i].addr == addr) { |
|
989 |
/* Free the key */
|
|
990 |
kfree(tp->md5sig_info->keys4[i].base.key); |
|
991 |
tp->md5sig_info->entries4--; |
|
992 |
||
993 |
if (tp->md5sig_info->entries4 == 0) { |
|
994 |
kfree(tp->md5sig_info->keys4); |
|
995 |
tp->md5sig_info->keys4 = NULL; |
|
996 |
tp->md5sig_info->alloced4 = 0; |
|
1.2.30
by Bastian Blank
Import upstream version 3.1.0 |
997 |
tcp_free_md5sig_pool(); |
1
by Bastian Blank
Import upstream version 2.6.26 |
998 |
} else if (tp->md5sig_info->entries4 != i) { |
999 |
/* Need to do some manipulation */
|
|
1000 |
memmove(&tp->md5sig_info->keys4[i], |
|
1001 |
&tp->md5sig_info->keys4[i+1], |
|
1002 |
(tp->md5sig_info->entries4 - i) * |
|
1003 |
sizeof(struct tcp4_md5sig_key)); |
|
1004 |
}
|
|
1005 |
return 0; |
|
1006 |
}
|
|
1007 |
}
|
|
1008 |
return -ENOENT; |
|
1009 |
}
|
|
1010 |
EXPORT_SYMBOL(tcp_v4_md5_do_del); |
|
1011 |
||
1012 |
static void tcp_v4_clear_md5_list(struct sock *sk) |
|
1013 |
{
|
|
1014 |
struct tcp_sock *tp = tcp_sk(sk); |
|
1015 |
||
1016 |
/* Free each key, then the set of key keys,
|
|
1017 |
* the crypto element, and then decrement our
|
|
1018 |
* hold on the last resort crypto.
|
|
1019 |
*/
|
|
1020 |
if (tp->md5sig_info->entries4) { |
|
1021 |
int i; |
|
1022 |
for (i = 0; i < tp->md5sig_info->entries4; i++) |
|
1023 |
kfree(tp->md5sig_info->keys4[i].base.key); |
|
1024 |
tp->md5sig_info->entries4 = 0; |
|
1025 |
tcp_free_md5sig_pool(); |
|
1026 |
}
|
|
1027 |
if (tp->md5sig_info->keys4) { |
|
1028 |
kfree(tp->md5sig_info->keys4); |
|
1029 |
tp->md5sig_info->keys4 = NULL; |
|
1030 |
tp->md5sig_info->alloced4 = 0; |
|
1031 |
}
|
|
1032 |
}
|
|
1033 |
||
1034 |
static int tcp_v4_parse_md5_keys(struct sock *sk, char __user *optval, |
|
1035 |
int optlen) |
|
1036 |
{
|
|
1037 |
struct tcp_md5sig cmd; |
|
1038 |
struct sockaddr_in *sin = (struct sockaddr_in *)&cmd.tcpm_addr; |
|
1039 |
u8 *newkey; |
|
1040 |
||
1041 |
if (optlen < sizeof(cmd)) |
|
1042 |
return -EINVAL; |
|
1043 |
||
1044 |
if (copy_from_user(&cmd, optval, sizeof(cmd))) |
|
1045 |
return -EFAULT; |
|
1046 |
||
1047 |
if (sin->sin_family != AF_INET) |
|
1048 |
return -EINVAL; |
|
1049 |
||
1050 |
if (!cmd.tcpm_key || !cmd.tcpm_keylen) { |
|
1051 |
if (!tcp_sk(sk)->md5sig_info) |
|
1052 |
return -ENOENT; |
|
1053 |
return tcp_v4_md5_do_del(sk, sin->sin_addr.s_addr); |
|
1054 |
}
|
|
1055 |
||
1056 |
if (cmd.tcpm_keylen > TCP_MD5SIG_MAXKEYLEN) |
|
1057 |
return -EINVAL; |
|
1058 |
||
1059 |
if (!tcp_sk(sk)->md5sig_info) { |
|
1060 |
struct tcp_sock *tp = tcp_sk(sk); |
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
1061 |
struct tcp_md5sig_info *p; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1062 |
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
1063 |
p = kzalloc(sizeof(*p), sk->sk_allocation); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1064 |
if (!p) |
1065 |
return -EINVAL; |
|
1066 |
||
1067 |
tp->md5sig_info = p; |
|
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
1068 |
sk_nocaps_add(sk, NETIF_F_GSO_MASK); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1069 |
}
|
1070 |
||
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
1071 |
newkey = kmemdup(cmd.tcpm_key, cmd.tcpm_keylen, sk->sk_allocation); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1072 |
if (!newkey) |
1073 |
return -ENOMEM; |
|
1074 |
return tcp_v4_md5_do_add(sk, sin->sin_addr.s_addr, |
|
1075 |
newkey, cmd.tcpm_keylen); |
|
1076 |
}
|
|
1077 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1078 |
static int tcp_v4_md5_hash_pseudoheader(struct tcp_md5sig_pool *hp, |
1079 |
__be32 daddr, __be32 saddr, int nbytes) |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1080 |
{
|
1081 |
struct tcp4_pseudohdr *bp; |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1082 |
struct scatterlist sg; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1083 |
|
1084 |
bp = &hp->md5_blk.ip4; |
|
1085 |
||
1086 |
/*
|
|
1087 |
* 1. the TCP pseudo-header (in the order: source IP address,
|
|
1088 |
* destination IP address, zero-padded protocol number, and
|
|
1089 |
* segment length)
|
|
1090 |
*/
|
|
1091 |
bp->saddr = saddr; |
|
1092 |
bp->daddr = daddr; |
|
1093 |
bp->pad = 0; |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1094 |
bp->protocol = IPPROTO_TCP; |
1095 |
bp->len = cpu_to_be16(nbytes); |
|
1096 |
||
1097 |
sg_init_one(&sg, bp, sizeof(*bp)); |
|
1098 |
return crypto_hash_update(&hp->md5_desc, &sg, sizeof(*bp)); |
|
1099 |
}
|
|
1100 |
||
1101 |
static int tcp_v4_md5_hash_hdr(char *md5_hash, struct tcp_md5sig_key *key, |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1102 |
__be32 daddr, __be32 saddr, const struct tcphdr *th) |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1103 |
{
|
1104 |
struct tcp_md5sig_pool *hp; |
|
1105 |
struct hash_desc *desc; |
|
1106 |
||
1107 |
hp = tcp_get_md5sig_pool(); |
|
1108 |
if (!hp) |
|
1109 |
goto clear_hash_noput; |
|
1110 |
desc = &hp->md5_desc; |
|
1111 |
||
1112 |
if (crypto_hash_init(desc)) |
|
1113 |
goto clear_hash; |
|
1114 |
if (tcp_v4_md5_hash_pseudoheader(hp, daddr, saddr, th->doff << 2)) |
|
1115 |
goto clear_hash; |
|
1116 |
if (tcp_md5_hash_header(hp, th)) |
|
1117 |
goto clear_hash; |
|
1118 |
if (tcp_md5_hash_key(hp, key)) |
|
1119 |
goto clear_hash; |
|
1120 |
if (crypto_hash_final(desc, md5_hash)) |
|
1121 |
goto clear_hash; |
|
1122 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
1123 |
tcp_put_md5sig_pool(); |
1124 |
return 0; |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1125 |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1126 |
clear_hash: |
1127 |
tcp_put_md5sig_pool(); |
|
1128 |
clear_hash_noput: |
|
1129 |
memset(md5_hash, 0, 16); |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1130 |
return 1; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1131 |
}
|
1132 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1133 |
int tcp_v4_md5_hash_skb(char *md5_hash, struct tcp_md5sig_key *key, |
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1134 |
const struct sock *sk, const struct request_sock *req, |
1135 |
const struct sk_buff *skb) |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1136 |
{
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1137 |
struct tcp_md5sig_pool *hp; |
1138 |
struct hash_desc *desc; |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1139 |
const struct tcphdr *th = tcp_hdr(skb); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1140 |
__be32 saddr, daddr; |
1141 |
||
1142 |
if (sk) { |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1143 |
saddr = inet_sk(sk)->inet_saddr; |
1144 |
daddr = inet_sk(sk)->inet_daddr; |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1145 |
} else if (req) { |
1146 |
saddr = inet_rsk(req)->loc_addr; |
|
1147 |
daddr = inet_rsk(req)->rmt_addr; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1148 |
} else { |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1149 |
const struct iphdr *iph = ip_hdr(skb); |
1150 |
saddr = iph->saddr; |
|
1151 |
daddr = iph->daddr; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1152 |
}
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1153 |
|
1154 |
hp = tcp_get_md5sig_pool(); |
|
1155 |
if (!hp) |
|
1156 |
goto clear_hash_noput; |
|
1157 |
desc = &hp->md5_desc; |
|
1158 |
||
1159 |
if (crypto_hash_init(desc)) |
|
1160 |
goto clear_hash; |
|
1161 |
||
1162 |
if (tcp_v4_md5_hash_pseudoheader(hp, daddr, saddr, skb->len)) |
|
1163 |
goto clear_hash; |
|
1164 |
if (tcp_md5_hash_header(hp, th)) |
|
1165 |
goto clear_hash; |
|
1166 |
if (tcp_md5_hash_skb_data(hp, skb, th->doff << 2)) |
|
1167 |
goto clear_hash; |
|
1168 |
if (tcp_md5_hash_key(hp, key)) |
|
1169 |
goto clear_hash; |
|
1170 |
if (crypto_hash_final(desc, md5_hash)) |
|
1171 |
goto clear_hash; |
|
1172 |
||
1173 |
tcp_put_md5sig_pool(); |
|
1174 |
return 0; |
|
1175 |
||
1176 |
clear_hash: |
|
1177 |
tcp_put_md5sig_pool(); |
|
1178 |
clear_hash_noput: |
|
1179 |
memset(md5_hash, 0, 16); |
|
1180 |
return 1; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1181 |
}
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1182 |
EXPORT_SYMBOL(tcp_v4_md5_hash_skb); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1183 |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1184 |
static int tcp_v4_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1185 |
{
|
1186 |
/*
|
|
1187 |
* This gets called for each TCP segment that arrives
|
|
1188 |
* so we want to be efficient.
|
|
1189 |
* We have 3 drop cases:
|
|
1190 |
* o No MD5 hash and one expected.
|
|
1191 |
* o MD5 hash and we're not expecting one.
|
|
1192 |
* o MD5 hash and its wrong.
|
|
1193 |
*/
|
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1194 |
const __u8 *hash_location = NULL; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1195 |
struct tcp_md5sig_key *hash_expected; |
1196 |
const struct iphdr *iph = ip_hdr(skb); |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1197 |
const struct tcphdr *th = tcp_hdr(skb); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1198 |
int genhash; |
1199 |
unsigned char newhash[16]; |
|
1200 |
||
1201 |
hash_expected = tcp_v4_md5_do_lookup(sk, iph->saddr); |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1202 |
hash_location = tcp_parse_md5sig_option(th); |
1203 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
1204 |
/* We've parsed the options - do we have a hash? */
|
1205 |
if (!hash_expected && !hash_location) |
|
1206 |
return 0; |
|
1207 |
||
1208 |
if (hash_expected && !hash_location) { |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1209 |
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1210 |
return 1; |
1211 |
}
|
|
1212 |
||
1213 |
if (!hash_expected && hash_location) { |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1214 |
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1215 |
return 1; |
1216 |
}
|
|
1217 |
||
1218 |
/* Okay, so this is hash_expected and hash_location -
|
|
1219 |
* so we need to calculate the checksum.
|
|
1220 |
*/
|
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1221 |
genhash = tcp_v4_md5_hash_skb(newhash, |
1222 |
hash_expected, |
|
1223 |
NULL, NULL, skb); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1224 |
|
1225 |
if (genhash || memcmp(hash_location, newhash, 16) != 0) { |
|
1226 |
if (net_ratelimit()) { |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
1227 |
printk(KERN_INFO "MD5 Hash failed for (%pI4, %d)->(%pI4, %d)%s\n", |
1228 |
&iph->saddr, ntohs(th->source), |
|
1229 |
&iph->daddr, ntohs(th->dest), |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1230 |
genhash ? " tcp_v4_calc_md5_hash failed" : ""); |
1231 |
}
|
|
1232 |
return 1; |
|
1233 |
}
|
|
1234 |
return 0; |
|
1235 |
}
|
|
1236 |
||
1237 |
#endif
|
|
1238 |
||
1239 |
struct request_sock_ops tcp_request_sock_ops __read_mostly = { |
|
1240 |
.family = PF_INET, |
|
1241 |
.obj_size = sizeof(struct tcp_request_sock), |
|
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
1242 |
.rtx_syn_ack = tcp_v4_rtx_synack, |
1
by Bastian Blank
Import upstream version 2.6.26 |
1243 |
.send_ack = tcp_v4_reqsk_send_ack, |
1244 |
.destructor = tcp_v4_reqsk_destructor, |
|
1245 |
.send_reset = tcp_v4_send_reset, |
|
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
1246 |
.syn_ack_timeout = tcp_syn_ack_timeout, |
1
by Bastian Blank
Import upstream version 2.6.26 |
1247 |
};
|
1248 |
||
1249 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
1250 |
static const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = { |
1
by Bastian Blank
Import upstream version 2.6.26 |
1251 |
.md5_lookup = tcp_v4_reqsk_md5_lookup, |
1.1.4
by maximilian attems
Import upstream version 2.6.31 |
1252 |
.calc_md5_hash = tcp_v4_md5_hash_skb, |
1
by Bastian Blank
Import upstream version 2.6.26 |
1253 |
};
|
1254 |
#endif
|
|
1255 |
||
1256 |
int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb) |
|
1257 |
{
|
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1258 |
struct tcp_extend_values tmp_ext; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1259 |
struct tcp_options_received tmp_opt; |
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1260 |
const u8 *hash_location; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1261 |
struct request_sock *req; |
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1262 |
struct inet_request_sock *ireq; |
1263 |
struct tcp_sock *tp = tcp_sk(sk); |
|
1264 |
struct dst_entry *dst = NULL; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1265 |
__be32 saddr = ip_hdr(skb)->saddr; |
1266 |
__be32 daddr = ip_hdr(skb)->daddr; |
|
1267 |
__u32 isn = TCP_SKB_CB(skb)->when; |
|
1268 |
int want_cookie = 0; |
|
1269 |
||
1270 |
/* Never answer to SYNs send to broadcast or multicast */
|
|
1.1.4
by maximilian attems
Import upstream version 2.6.31 |
1271 |
if (skb_rtable(skb)->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST)) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1272 |
goto drop; |
1273 |
||
1274 |
/* TW buckets are converted to open requests without
|
|
1275 |
* limitations, they conserve resources and peer is
|
|
1276 |
* evidently real one.
|
|
1277 |
*/
|
|
1278 |
if (inet_csk_reqsk_queue_is_full(sk) && !isn) { |
|
1.2.29
by Ben Hutchings
Import upstream version 3.1.0~rc7 |
1279 |
want_cookie = tcp_syn_flood_action(sk, skb, "TCP"); |
1280 |
if (!want_cookie) |
|
1281 |
goto drop; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1282 |
}
|
1283 |
||
1284 |
/* Accept backlog is full. If we have already queued enough
|
|
1285 |
* of warm entries in syn queue, drop request. It is better than
|
|
1286 |
* clogging syn queue with openreqs with exponentially increasing
|
|
1287 |
* timeout.
|
|
1288 |
*/
|
|
1289 |
if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1) |
|
1290 |
goto drop; |
|
1291 |
||
1292 |
req = inet_reqsk_alloc(&tcp_request_sock_ops); |
|
1293 |
if (!req) |
|
1294 |
goto drop; |
|
1295 |
||
1296 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1297 |
tcp_rsk(req)->af_specific = &tcp_request_sock_ipv4_ops; |
|
1298 |
#endif
|
|
1299 |
||
1300 |
tcp_clear_options(&tmp_opt); |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1301 |
tmp_opt.mss_clamp = TCP_MSS_DEFAULT; |
1302 |
tmp_opt.user_mss = tp->rx_opt.user_mss; |
|
1303 |
tcp_parse_options(skb, &tmp_opt, &hash_location, 0); |
|
1304 |
||
1305 |
if (tmp_opt.cookie_plus > 0 && |
|
1306 |
tmp_opt.saw_tstamp && |
|
1307 |
!tp->rx_opt.cookie_out_never && |
|
1308 |
(sysctl_tcp_cookie_size > 0 || |
|
1309 |
(tp->cookie_values != NULL && |
|
1310 |
tp->cookie_values->cookie_desired > 0))) { |
|
1311 |
u8 *c; |
|
1312 |
u32 *mess = &tmp_ext.cookie_bakery[COOKIE_DIGEST_WORDS]; |
|
1313 |
int l = tmp_opt.cookie_plus - TCPOLEN_COOKIE_BASE; |
|
1314 |
||
1315 |
if (tcp_cookie_generator(&tmp_ext.cookie_bakery[0]) != 0) |
|
1316 |
goto drop_and_release; |
|
1317 |
||
1318 |
/* Secret recipe starts with IP addresses */
|
|
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
1319 |
*mess++ ^= (__force u32)daddr; |
1320 |
*mess++ ^= (__force u32)saddr; |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1321 |
|
1322 |
/* plus variable length Initiator Cookie */
|
|
1323 |
c = (u8 *)mess; |
|
1324 |
while (l-- > 0) |
|
1325 |
*c++ ^= *hash_location++; |
|
1326 |
||
1327 |
want_cookie = 0; /* not our kind of cookie */ |
|
1328 |
tmp_ext.cookie_out_never = 0; /* false */ |
|
1329 |
tmp_ext.cookie_plus = tmp_opt.cookie_plus; |
|
1330 |
} else if (!tp->rx_opt.cookie_in_always) { |
|
1331 |
/* redundant indications, but ensure initialization. */
|
|
1332 |
tmp_ext.cookie_out_never = 1; /* true */ |
|
1333 |
tmp_ext.cookie_plus = 0; |
|
1334 |
} else { |
|
1335 |
goto drop_and_release; |
|
1336 |
}
|
|
1337 |
tmp_ext.cookie_in_always = tp->rx_opt.cookie_in_always; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1338 |
|
1339 |
if (want_cookie && !tmp_opt.saw_tstamp) |
|
1340 |
tcp_clear_options(&tmp_opt); |
|
1341 |
||
1342 |
tmp_opt.tstamp_ok = tmp_opt.saw_tstamp; |
|
1343 |
tcp_openreq_init(req, &tmp_opt, skb); |
|
1344 |
||
1345 |
ireq = inet_rsk(req); |
|
1346 |
ireq->loc_addr = daddr; |
|
1347 |
ireq->rmt_addr = saddr; |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1348 |
ireq->no_srccheck = inet_sk(sk)->transparent; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1349 |
ireq->opt = tcp_v4_save_options(sk, skb); |
1.1.3
by Bastian Blank
Import upstream version 2.6.30 |
1350 |
|
1351 |
if (security_inet_conn_request(sk, skb, req)) |
|
1352 |
goto drop_and_free; |
|
1353 |
||
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
1354 |
if (!want_cookie || tmp_opt.tstamp_ok) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1355 |
TCP_ECN_create_request(req, tcp_hdr(skb)); |
1356 |
||
1357 |
if (want_cookie) { |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
1358 |
isn = cookie_v4_init_sequence(sk, skb, &req->mss); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1359 |
req->cookie_ts = tmp_opt.tstamp_ok; |
1360 |
} else if (!isn) { |
|
1361 |
struct inet_peer *peer = NULL; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1362 |
struct flowi4 fl4; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1363 |
|
1364 |
/* VJ's idea. We save last timestamp seen
|
|
1365 |
* from the destination in peer table, when entering
|
|
1366 |
* state TIME-WAIT, and check against it before
|
|
1367 |
* accepting new connection request.
|
|
1368 |
*
|
|
1369 |
* If "isn" is not zero, this request hit alive
|
|
1370 |
* timewait bucket, so that all the necessary checks
|
|
1371 |
* are made in the function processing timewait state.
|
|
1372 |
*/
|
|
1373 |
if (tmp_opt.saw_tstamp && |
|
1374 |
tcp_death_row.sysctl_tw_recycle && |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1375 |
(dst = inet_csk_route_req(sk, &fl4, req)) != NULL && |
1376 |
fl4.daddr == saddr && |
|
1377 |
(peer = rt_get_peer((struct rtable *)dst, fl4.daddr)) != NULL) { |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
1378 |
inet_peer_refcheck(peer); |
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1379 |
if ((u32)get_seconds() - peer->tcp_ts_stamp < TCP_PAWS_MSL && |
1
by Bastian Blank
Import upstream version 2.6.26 |
1380 |
(s32)(peer->tcp_ts - req->ts_recent) > |
1381 |
TCP_PAWS_WINDOW) { |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1382 |
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_PAWSPASSIVEREJECTED); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1383 |
goto drop_and_release; |
1384 |
}
|
|
1385 |
}
|
|
1386 |
/* Kill the following clause, if you dislike this way. */
|
|
1387 |
else if (!sysctl_tcp_syncookies && |
|
1388 |
(sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) < |
|
1389 |
(sysctl_max_syn_backlog >> 2)) && |
|
1390 |
(!peer || !peer->tcp_ts_stamp) && |
|
1391 |
(!dst || !dst_metric(dst, RTAX_RTT))) { |
|
1392 |
/* Without syncookies last quarter of
|
|
1393 |
* backlog is filled with destinations,
|
|
1394 |
* proven to be alive.
|
|
1395 |
* It means that we continue to communicate
|
|
1396 |
* to destinations, already remembered
|
|
1397 |
* to the moment of synflood.
|
|
1398 |
*/
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
1399 |
LIMIT_NETDEBUG(KERN_DEBUG "TCP: drop open request from %pI4/%u\n", |
1400 |
&saddr, ntohs(tcp_hdr(skb)->source)); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1401 |
goto drop_and_release; |
1402 |
}
|
|
1403 |
||
1404 |
isn = tcp_v4_init_sequence(skb); |
|
1405 |
}
|
|
1406 |
tcp_rsk(req)->snt_isn = isn; |
|
1.2.27
by Ben Hutchings
Import upstream version 3.1.0~rc4 |
1407 |
tcp_rsk(req)->snt_synack = tcp_time_stamp; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1408 |
|
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
1409 |
if (tcp_v4_send_synack(sk, dst, req, |
1410 |
(struct request_values *)&tmp_ext) || |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1411 |
want_cookie) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1412 |
goto drop_and_free; |
1413 |
||
1414 |
inet_csk_reqsk_queue_hash_add(sk, req, TCP_TIMEOUT_INIT); |
|
1415 |
return 0; |
|
1416 |
||
1417 |
drop_and_release: |
|
1418 |
dst_release(dst); |
|
1419 |
drop_and_free: |
|
1420 |
reqsk_free(req); |
|
1421 |
drop: |
|
1422 |
return 0; |
|
1423 |
}
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
1424 |
EXPORT_SYMBOL(tcp_v4_conn_request); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1425 |
|
1426 |
||
1427 |
/*
|
|
1428 |
* The three way handshake has completed - we got a valid synack -
|
|
1429 |
* now create the new socket.
|
|
1430 |
*/
|
|
1431 |
struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb, |
|
1432 |
struct request_sock *req, |
|
1433 |
struct dst_entry *dst) |
|
1434 |
{
|
|
1435 |
struct inet_request_sock *ireq; |
|
1436 |
struct inet_sock *newinet; |
|
1437 |
struct tcp_sock *newtp; |
|
1438 |
struct sock *newsk; |
|
1439 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1440 |
struct tcp_md5sig_key *key; |
|
1441 |
#endif
|
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1442 |
struct ip_options_rcu *inet_opt; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1443 |
|
1444 |
if (sk_acceptq_is_full(sk)) |
|
1445 |
goto exit_overflow; |
|
1446 |
||
1447 |
newsk = tcp_create_openreq_child(sk, req, skb); |
|
1448 |
if (!newsk) |
|
1.2.10
by Ben Hutchings
Import upstream version 2.6.37~rc4 |
1449 |
goto exit_nonewsk; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1450 |
|
1451 |
newsk->sk_gso_type = SKB_GSO_TCPV4; |
|
1452 |
||
1453 |
newtp = tcp_sk(newsk); |
|
1454 |
newinet = inet_sk(newsk); |
|
1455 |
ireq = inet_rsk(req); |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1456 |
newinet->inet_daddr = ireq->rmt_addr; |
1457 |
newinet->inet_rcv_saddr = ireq->loc_addr; |
|
1458 |
newinet->inet_saddr = ireq->loc_addr; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1459 |
inet_opt = ireq->opt; |
1460 |
rcu_assign_pointer(newinet->inet_opt, inet_opt); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1461 |
ireq->opt = NULL; |
1462 |
newinet->mc_index = inet_iif(skb); |
|
1463 |
newinet->mc_ttl = ip_hdr(skb)->ttl; |
|
1464 |
inet_csk(newsk)->icsk_ext_hdr_len = 0; |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1465 |
if (inet_opt) |
1466 |
inet_csk(newsk)->icsk_ext_hdr_len = inet_opt->opt.optlen; |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1467 |
newinet->inet_id = newtp->write_seq ^ jiffies; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1468 |
|
1.2.34
by Ben Hutchings
Import upstream version 3.3 |
1469 |
if (!dst) { |
1470 |
dst = inet_csk_route_child_sock(sk, newsk, req); |
|
1471 |
if (!dst) |
|
1472 |
goto put_and_exit; |
|
1473 |
} else { |
|
1474 |
/* syncookie case : see end of cookie_v4_check() */
|
|
1475 |
}
|
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1476 |
sk_setup_caps(newsk, dst); |
1477 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
1478 |
tcp_mtup_init(newsk); |
1479 |
tcp_sync_mss(newsk, dst_mtu(dst)); |
|
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1480 |
newtp->advmss = dst_metric_advmss(dst); |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1481 |
if (tcp_sk(sk)->rx_opt.user_mss && |
1482 |
tcp_sk(sk)->rx_opt.user_mss < newtp->advmss) |
|
1483 |
newtp->advmss = tcp_sk(sk)->rx_opt.user_mss; |
|
1484 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
1485 |
tcp_initialize_rcv_mss(newsk); |
1.2.27
by Ben Hutchings
Import upstream version 3.1.0~rc4 |
1486 |
if (tcp_rsk(req)->snt_synack) |
1487 |
tcp_valid_rtt_meas(newsk, |
|
1488 |
tcp_time_stamp - tcp_rsk(req)->snt_synack); |
|
1489 |
newtp->total_retrans = req->retrans; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1490 |
|
1491 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1492 |
/* Copy over the MD5 key from the original socket */
|
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1493 |
key = tcp_v4_md5_do_lookup(sk, newinet->inet_daddr); |
1494 |
if (key != NULL) { |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1495 |
/*
|
1496 |
* We're using one, so create a matching key
|
|
1497 |
* on the newsk structure. If we fail to get
|
|
1498 |
* memory, then we end up not copying the key
|
|
1499 |
* across. Shucks.
|
|
1500 |
*/
|
|
1501 |
char *newkey = kmemdup(key->key, key->keylen, GFP_ATOMIC); |
|
1502 |
if (newkey != NULL) |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1503 |
tcp_v4_md5_do_add(newsk, newinet->inet_daddr, |
1
by Bastian Blank
Import upstream version 2.6.26 |
1504 |
newkey, key->keylen); |
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
1505 |
sk_nocaps_add(newsk, NETIF_F_GSO_MASK); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1506 |
}
|
1507 |
#endif
|
|
1508 |
||
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1509 |
if (__inet_inherit_port(sk, newsk) < 0) |
1510 |
goto put_and_exit; |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1511 |
__inet_hash_nolisten(newsk, NULL); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1512 |
|
1513 |
return newsk; |
|
1514 |
||
1515 |
exit_overflow: |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1516 |
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS); |
1.2.10
by Ben Hutchings
Import upstream version 2.6.37~rc4 |
1517 |
exit_nonewsk: |
1518 |
dst_release(dst); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1519 |
exit: |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1520 |
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1521 |
return NULL; |
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1522 |
put_and_exit: |
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1523 |
tcp_clear_xmit_timers(newsk); |
1.2.33
by Ben Hutchings
Import upstream version 3.3~rc6 |
1524 |
tcp_cleanup_congestion_control(newsk); |
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1525 |
bh_unlock_sock(newsk); |
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1526 |
sock_put(newsk); |
1527 |
goto exit; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1528 |
}
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
1529 |
EXPORT_SYMBOL(tcp_v4_syn_recv_sock); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1530 |
|
1531 |
static struct sock *tcp_v4_hnd_req(struct sock *sk, struct sk_buff *skb) |
|
1532 |
{
|
|
1533 |
struct tcphdr *th = tcp_hdr(skb); |
|
1534 |
const struct iphdr *iph = ip_hdr(skb); |
|
1535 |
struct sock *nsk; |
|
1536 |
struct request_sock **prev; |
|
1537 |
/* Find possible connection requests. */
|
|
1538 |
struct request_sock *req = inet_csk_search_req(sk, &prev, th->source, |
|
1539 |
iph->saddr, iph->daddr); |
|
1540 |
if (req) |
|
1541 |
return tcp_check_req(sk, skb, req, prev); |
|
1542 |
||
1543 |
nsk = inet_lookup_established(sock_net(sk), &tcp_hashinfo, iph->saddr, |
|
1544 |
th->source, iph->daddr, th->dest, inet_iif(skb)); |
|
1545 |
||
1546 |
if (nsk) { |
|
1547 |
if (nsk->sk_state != TCP_TIME_WAIT) { |
|
1548 |
bh_lock_sock(nsk); |
|
1549 |
return nsk; |
|
1550 |
}
|
|
1551 |
inet_twsk_put(inet_twsk(nsk)); |
|
1552 |
return NULL; |
|
1553 |
}
|
|
1554 |
||
1555 |
#ifdef CONFIG_SYN_COOKIES
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
1556 |
if (!th->syn) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1557 |
sk = cookie_v4_check(sk, skb, &(IPCB(skb)->opt)); |
1558 |
#endif
|
|
1559 |
return sk; |
|
1560 |
}
|
|
1561 |
||
1562 |
static __sum16 tcp_v4_checksum_init(struct sk_buff *skb) |
|
1563 |
{
|
|
1564 |
const struct iphdr *iph = ip_hdr(skb); |
|
1565 |
||
1566 |
if (skb->ip_summed == CHECKSUM_COMPLETE) { |
|
1567 |
if (!tcp_v4_check(skb->len, iph->saddr, |
|
1568 |
iph->daddr, skb->csum)) { |
|
1569 |
skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
1570 |
return 0; |
|
1571 |
}
|
|
1572 |
}
|
|
1573 |
||
1574 |
skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr, |
|
1575 |
skb->len, IPPROTO_TCP, 0); |
|
1576 |
||
1577 |
if (skb->len <= 76) { |
|
1578 |
return __skb_checksum_complete(skb); |
|
1579 |
}
|
|
1580 |
return 0; |
|
1581 |
}
|
|
1582 |
||
1583 |
||
1584 |
/* The socket must have it's spinlock held when we get
|
|
1585 |
* here.
|
|
1586 |
*
|
|
1587 |
* We have a potential double-lock case here, so even when
|
|
1588 |
* doing backlog processing we use the BH locking scheme.
|
|
1589 |
* This is because we cannot sleep with the original spinlock
|
|
1590 |
* held.
|
|
1591 |
*/
|
|
1592 |
int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb) |
|
1593 |
{
|
|
1594 |
struct sock *rsk; |
|
1595 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1596 |
/*
|
|
1597 |
* We really want to reject the packet as early as possible
|
|
1598 |
* if:
|
|
1599 |
* o We're expecting an MD5'd packet and this is no MD5 tcp option
|
|
1600 |
* o There is an MD5 option and we're not expecting one
|
|
1601 |
*/
|
|
1602 |
if (tcp_v4_inbound_md5_hash(sk, skb)) |
|
1603 |
goto discard; |
|
1604 |
#endif
|
|
1605 |
||
1606 |
if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */ |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1607 |
sock_rps_save_rxhash(sk, skb); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1608 |
if (tcp_rcv_established(sk, skb, tcp_hdr(skb), skb->len)) { |
1609 |
rsk = sk; |
|
1610 |
goto reset; |
|
1611 |
}
|
|
1612 |
return 0; |
|
1613 |
}
|
|
1614 |
||
1615 |
if (skb->len < tcp_hdrlen(skb) || tcp_checksum_complete(skb)) |
|
1616 |
goto csum_err; |
|
1617 |
||
1618 |
if (sk->sk_state == TCP_LISTEN) { |
|
1619 |
struct sock *nsk = tcp_v4_hnd_req(sk, skb); |
|
1620 |
if (!nsk) |
|
1621 |
goto discard; |
|
1622 |
||
1623 |
if (nsk != sk) { |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1624 |
sock_rps_save_rxhash(nsk, skb); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1625 |
if (tcp_child_process(sk, nsk, skb)) { |
1626 |
rsk = nsk; |
|
1627 |
goto reset; |
|
1628 |
}
|
|
1629 |
return 0; |
|
1630 |
}
|
|
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
1631 |
} else |
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1632 |
sock_rps_save_rxhash(sk, skb); |
1.2.3
by Ben Hutchings
Import upstream version 2.6.35~rc4 |
1633 |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1634 |
if (tcp_rcv_state_process(sk, skb, tcp_hdr(skb), skb->len)) { |
1635 |
rsk = sk; |
|
1636 |
goto reset; |
|
1637 |
}
|
|
1638 |
return 0; |
|
1639 |
||
1640 |
reset: |
|
1641 |
tcp_v4_send_reset(rsk, skb); |
|
1642 |
discard: |
|
1643 |
kfree_skb(skb); |
|
1644 |
/* Be careful here. If this function gets more complicated and
|
|
1645 |
* gcc suffers from register pressure on the x86, sk (in %ebx)
|
|
1646 |
* might be destroyed here. This current version compiles correctly,
|
|
1647 |
* but you have been warned.
|
|
1648 |
*/
|
|
1649 |
return 0; |
|
1650 |
||
1651 |
csum_err: |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1652 |
TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_INERRS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1653 |
goto discard; |
1654 |
}
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
1655 |
EXPORT_SYMBOL(tcp_v4_do_rcv); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1656 |
|
1657 |
/*
|
|
1658 |
* From tcp_input.c
|
|
1659 |
*/
|
|
1660 |
||
1661 |
int tcp_v4_rcv(struct sk_buff *skb) |
|
1662 |
{
|
|
1663 |
const struct iphdr *iph; |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1664 |
const struct tcphdr *th; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1665 |
struct sock *sk; |
1666 |
int ret; |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1667 |
struct net *net = dev_net(skb->dev); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1668 |
|
1669 |
if (skb->pkt_type != PACKET_HOST) |
|
1670 |
goto discard_it; |
|
1671 |
||
1672 |
/* Count it even if it's bad */
|
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1673 |
TCP_INC_STATS_BH(net, TCP_MIB_INSEGS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1674 |
|
1675 |
if (!pskb_may_pull(skb, sizeof(struct tcphdr))) |
|
1676 |
goto discard_it; |
|
1677 |
||
1678 |
th = tcp_hdr(skb); |
|
1679 |
||
1680 |
if (th->doff < sizeof(struct tcphdr) / 4) |
|
1681 |
goto bad_packet; |
|
1682 |
if (!pskb_may_pull(skb, th->doff * 4)) |
|
1683 |
goto discard_it; |
|
1684 |
||
1685 |
/* An explanation is required here, I think.
|
|
1686 |
* Packet length and doff are validated by header prediction,
|
|
1687 |
* provided case of th->doff==0 is eliminated.
|
|
1688 |
* So, we defer the checks. */
|
|
1689 |
if (!skb_csum_unnecessary(skb) && tcp_v4_checksum_init(skb)) |
|
1690 |
goto bad_packet; |
|
1691 |
||
1692 |
th = tcp_hdr(skb); |
|
1693 |
iph = ip_hdr(skb); |
|
1694 |
TCP_SKB_CB(skb)->seq = ntohl(th->seq); |
|
1695 |
TCP_SKB_CB(skb)->end_seq = (TCP_SKB_CB(skb)->seq + th->syn + th->fin + |
|
1696 |
skb->len - th->doff * 4); |
|
1697 |
TCP_SKB_CB(skb)->ack_seq = ntohl(th->ack_seq); |
|
1698 |
TCP_SKB_CB(skb)->when = 0; |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1699 |
TCP_SKB_CB(skb)->ip_dsfield = ipv4_get_dsfield(iph); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1700 |
TCP_SKB_CB(skb)->sacked = 0; |
1701 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1702 |
sk = __inet_lookup_skb(&tcp_hashinfo, skb, th->source, th->dest); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1703 |
if (!sk) |
1704 |
goto no_tcp_socket; |
|
1705 |
||
1706 |
process: |
|
1707 |
if (sk->sk_state == TCP_TIME_WAIT) |
|
1708 |
goto do_time_wait; |
|
1709 |
||
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
1710 |
if (unlikely(iph->ttl < inet_sk(sk)->min_ttl)) { |
1711 |
NET_INC_STATS_BH(net, LINUX_MIB_TCPMINTTLDROP); |
|
1712 |
goto discard_and_relse; |
|
1713 |
}
|
|
1714 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
1715 |
if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) |
1716 |
goto discard_and_relse; |
|
1717 |
nf_reset(skb); |
|
1718 |
||
1719 |
if (sk_filter(sk, skb)) |
|
1720 |
goto discard_and_relse; |
|
1721 |
||
1722 |
skb->dev = NULL; |
|
1723 |
||
1724 |
bh_lock_sock_nested(sk); |
|
1725 |
ret = 0; |
|
1726 |
if (!sock_owned_by_user(sk)) { |
|
1727 |
#ifdef CONFIG_NET_DMA
|
|
1728 |
struct tcp_sock *tp = tcp_sk(sk); |
|
1729 |
if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list) |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
1730 |
tp->ucopy.dma_chan = dma_find_channel(DMA_MEMCPY); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1731 |
if (tp->ucopy.dma_chan) |
1732 |
ret = tcp_v4_do_rcv(sk, skb); |
|
1733 |
else
|
|
1734 |
#endif
|
|
1735 |
{
|
|
1736 |
if (!tcp_prequeue(sk, skb)) |
|
1.1.4
by maximilian attems
Import upstream version 2.6.31 |
1737 |
ret = tcp_v4_do_rcv(sk, skb); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1738 |
}
|
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
1739 |
} else if (unlikely(sk_add_backlog(sk, skb))) { |
1740 |
bh_unlock_sock(sk); |
|
1741 |
NET_INC_STATS_BH(net, LINUX_MIB_TCPBACKLOGDROP); |
|
1742 |
goto discard_and_relse; |
|
1743 |
}
|
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1744 |
bh_unlock_sock(sk); |
1745 |
||
1746 |
sock_put(sk); |
|
1747 |
||
1748 |
return ret; |
|
1749 |
||
1750 |
no_tcp_socket: |
|
1751 |
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) |
|
1752 |
goto discard_it; |
|
1753 |
||
1754 |
if (skb->len < (th->doff << 2) || tcp_checksum_complete(skb)) { |
|
1755 |
bad_packet: |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1756 |
TCP_INC_STATS_BH(net, TCP_MIB_INERRS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1757 |
} else { |
1758 |
tcp_v4_send_reset(NULL, skb); |
|
1759 |
}
|
|
1760 |
||
1761 |
discard_it: |
|
1762 |
/* Discard frame. */
|
|
1763 |
kfree_skb(skb); |
|
1764 |
return 0; |
|
1765 |
||
1766 |
discard_and_relse: |
|
1767 |
sock_put(sk); |
|
1768 |
goto discard_it; |
|
1769 |
||
1770 |
do_time_wait: |
|
1771 |
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) { |
|
1772 |
inet_twsk_put(inet_twsk(sk)); |
|
1773 |
goto discard_it; |
|
1774 |
}
|
|
1775 |
||
1776 |
if (skb->len < (th->doff << 2) || tcp_checksum_complete(skb)) { |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1777 |
TCP_INC_STATS_BH(net, TCP_MIB_INERRS); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1778 |
inet_twsk_put(inet_twsk(sk)); |
1779 |
goto discard_it; |
|
1780 |
}
|
|
1781 |
switch (tcp_timewait_state_process(inet_twsk(sk), skb, th)) { |
|
1782 |
case TCP_TW_SYN: { |
|
1783 |
struct sock *sk2 = inet_lookup_listener(dev_net(skb->dev), |
|
1784 |
&tcp_hashinfo, |
|
1785 |
iph->daddr, th->dest, |
|
1786 |
inet_iif(skb)); |
|
1787 |
if (sk2) { |
|
1788 |
inet_twsk_deschedule(inet_twsk(sk), &tcp_death_row); |
|
1789 |
inet_twsk_put(inet_twsk(sk)); |
|
1790 |
sk = sk2; |
|
1791 |
goto process; |
|
1792 |
}
|
|
1793 |
/* Fall through to ACK */
|
|
1794 |
}
|
|
1795 |
case TCP_TW_ACK: |
|
1796 |
tcp_v4_timewait_ack(sk, skb); |
|
1797 |
break; |
|
1798 |
case TCP_TW_RST: |
|
1799 |
goto no_tcp_socket; |
|
1800 |
case TCP_TW_SUCCESS:; |
|
1801 |
}
|
|
1802 |
goto discard_it; |
|
1803 |
}
|
|
1804 |
||
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1805 |
struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1806 |
{
|
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1807 |
struct rtable *rt = (struct rtable *) __sk_dst_get(sk); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1808 |
struct inet_sock *inet = inet_sk(sk); |
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1809 |
struct inet_peer *peer; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1810 |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1811 |
if (!rt || |
1812 |
inet->cork.fl.u.ip4.daddr != inet->inet_daddr) { |
|
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1813 |
peer = inet_getpeer_v4(inet->inet_daddr, 1); |
1814 |
*release_it = true; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1815 |
} else { |
1816 |
if (!rt->peer) |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
1817 |
rt_bind_peer(rt, inet->inet_daddr, 1); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1818 |
peer = rt->peer; |
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1819 |
*release_it = false; |
1820 |
}
|
|
1821 |
||
1822 |
return peer; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1823 |
}
|
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1824 |
EXPORT_SYMBOL(tcp_v4_get_peer); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1825 |
|
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1826 |
void *tcp_v4_tw_get_peer(struct sock *sk) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1827 |
{
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
1828 |
const struct inet_timewait_sock *tw = inet_twsk(sk); |
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1829 |
|
1830 |
return inet_getpeer_v4(tw->tw_daddr, 1); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1831 |
}
|
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1832 |
EXPORT_SYMBOL(tcp_v4_tw_get_peer); |
1833 |
||
1834 |
static struct timewait_sock_ops tcp_timewait_sock_ops = { |
|
1835 |
.twsk_obj_size = sizeof(struct tcp_timewait_sock), |
|
1836 |
.twsk_unique = tcp_twsk_unique, |
|
1837 |
.twsk_destructor= tcp_twsk_destructor, |
|
1838 |
.twsk_getpeer = tcp_v4_tw_get_peer, |
|
1839 |
};
|
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1840 |
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
1841 |
const struct inet_connection_sock_af_ops ipv4_specific = { |
1
by Bastian Blank
Import upstream version 2.6.26 |
1842 |
.queue_xmit = ip_queue_xmit, |
1843 |
.send_check = tcp_v4_send_check, |
|
1844 |
.rebuild_header = inet_sk_rebuild_header, |
|
1845 |
.conn_request = tcp_v4_conn_request, |
|
1846 |
.syn_recv_sock = tcp_v4_syn_recv_sock, |
|
1.2.14
by maximilian attems
Import upstream version 2.6.38~rc6 |
1847 |
.get_peer = tcp_v4_get_peer, |
1
by Bastian Blank
Import upstream version 2.6.26 |
1848 |
.net_header_len = sizeof(struct iphdr), |
1849 |
.setsockopt = ip_setsockopt, |
|
1850 |
.getsockopt = ip_getsockopt, |
|
1851 |
.addr2sockaddr = inet_csk_addr2sockaddr, |
|
1852 |
.sockaddr_len = sizeof(struct sockaddr_in), |
|
1853 |
.bind_conflict = inet_csk_bind_conflict, |
|
1854 |
#ifdef CONFIG_COMPAT
|
|
1855 |
.compat_setsockopt = compat_ip_setsockopt, |
|
1856 |
.compat_getsockopt = compat_ip_getsockopt, |
|
1857 |
#endif
|
|
1858 |
};
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
1859 |
EXPORT_SYMBOL(ipv4_specific); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1860 |
|
1861 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
1862 |
static const struct tcp_sock_af_ops tcp_sock_ipv4_specific = { |
1
by Bastian Blank
Import upstream version 2.6.26 |
1863 |
.md5_lookup = tcp_v4_md5_lookup, |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1864 |
.calc_md5_hash = tcp_v4_md5_hash_skb, |
1
by Bastian Blank
Import upstream version 2.6.26 |
1865 |
.md5_add = tcp_v4_md5_add_func, |
1866 |
.md5_parse = tcp_v4_parse_md5_keys, |
|
1867 |
};
|
|
1868 |
#endif
|
|
1869 |
||
1870 |
/* NOTE: A lot of things set to zero explicitly by call to
|
|
1871 |
* sk_alloc() so need not be done here.
|
|
1872 |
*/
|
|
1873 |
static int tcp_v4_init_sock(struct sock *sk) |
|
1874 |
{
|
|
1875 |
struct inet_connection_sock *icsk = inet_csk(sk); |
|
1876 |
struct tcp_sock *tp = tcp_sk(sk); |
|
1877 |
||
1878 |
skb_queue_head_init(&tp->out_of_order_queue); |
|
1879 |
tcp_init_xmit_timers(sk); |
|
1880 |
tcp_prequeue_init(tp); |
|
1881 |
||
1882 |
icsk->icsk_rto = TCP_TIMEOUT_INIT; |
|
1883 |
tp->mdev = TCP_TIMEOUT_INIT; |
|
1884 |
||
1885 |
/* So many TCP implementations out there (incorrectly) count the
|
|
1886 |
* initial SYN frame in their delayed-ACK and congestion control
|
|
1887 |
* algorithms that we must have the following bandaid to talk
|
|
1888 |
* efficiently to them. -DaveM
|
|
1889 |
*/
|
|
1.2.27
by Ben Hutchings
Import upstream version 3.1.0~rc4 |
1890 |
tp->snd_cwnd = TCP_INIT_CWND; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1891 |
|
1892 |
/* See draft-stevens-tcpca-spec-01 for discussion of the
|
|
1893 |
* initialization of these values.
|
|
1894 |
*/
|
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
1895 |
tp->snd_ssthresh = TCP_INFINITE_SSTHRESH; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1896 |
tp->snd_cwnd_clamp = ~0; |
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1897 |
tp->mss_cache = TCP_MSS_DEFAULT; |
1
by Bastian Blank
Import upstream version 2.6.26 |
1898 |
|
1899 |
tp->reordering = sysctl_tcp_reordering; |
|
1900 |
icsk->icsk_ca_ops = &tcp_init_congestion_ops; |
|
1901 |
||
1902 |
sk->sk_state = TCP_CLOSE; |
|
1903 |
||
1904 |
sk->sk_write_space = sk_stream_write_space; |
|
1905 |
sock_set_flag(sk, SOCK_USE_WRITE_QUEUE); |
|
1906 |
||
1907 |
icsk->icsk_af_ops = &ipv4_specific; |
|
1908 |
icsk->icsk_sync_mss = tcp_sync_mss; |
|
1909 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1910 |
tp->af_specific = &tcp_sock_ipv4_specific; |
|
1911 |
#endif
|
|
1912 |
||
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1913 |
/* TCP Cookie Transactions */
|
1914 |
if (sysctl_tcp_cookie_size > 0) { |
|
1915 |
/* Default, cookies without s_data_payload. */
|
|
1916 |
tp->cookie_values = |
|
1917 |
kzalloc(sizeof(*tp->cookie_values), |
|
1918 |
sk->sk_allocation); |
|
1919 |
if (tp->cookie_values != NULL) |
|
1920 |
kref_init(&tp->cookie_values->kref); |
|
1921 |
}
|
|
1922 |
/* Presumed zeroed, in order of appearance:
|
|
1923 |
* cookie_in_always, cookie_out_never,
|
|
1924 |
* s_data_constant, s_data_in, s_data_out
|
|
1925 |
*/
|
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1926 |
sk->sk_sndbuf = sysctl_tcp_wmem[1]; |
1927 |
sk->sk_rcvbuf = sysctl_tcp_rmem[1]; |
|
1928 |
||
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
1929 |
local_bh_disable(); |
1.2.33
by Ben Hutchings
Import upstream version 3.3~rc6 |
1930 |
sock_update_memcg(sk); |
1931 |
sk_sockets_allocated_inc(sk); |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
1932 |
local_bh_enable(); |
1
by Bastian Blank
Import upstream version 2.6.26 |
1933 |
|
1934 |
return 0; |
|
1935 |
}
|
|
1936 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
1937 |
void tcp_v4_destroy_sock(struct sock *sk) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1938 |
{
|
1939 |
struct tcp_sock *tp = tcp_sk(sk); |
|
1940 |
||
1941 |
tcp_clear_xmit_timers(sk); |
|
1942 |
||
1943 |
tcp_cleanup_congestion_control(sk); |
|
1944 |
||
1945 |
/* Cleanup up the write buffer. */
|
|
1946 |
tcp_write_queue_purge(sk); |
|
1947 |
||
1948 |
/* Cleans up our, hopefully empty, out_of_order_queue. */
|
|
1949 |
__skb_queue_purge(&tp->out_of_order_queue); |
|
1950 |
||
1951 |
#ifdef CONFIG_TCP_MD5SIG
|
|
1952 |
/* Clean up the MD5 key list, if any */
|
|
1953 |
if (tp->md5sig_info) { |
|
1954 |
tcp_v4_clear_md5_list(sk); |
|
1955 |
kfree(tp->md5sig_info); |
|
1956 |
tp->md5sig_info = NULL; |
|
1957 |
}
|
|
1958 |
#endif
|
|
1959 |
||
1960 |
#ifdef CONFIG_NET_DMA
|
|
1961 |
/* Cleans up our sk_async_wait_queue */
|
|
1962 |
__skb_queue_purge(&sk->sk_async_wait_queue); |
|
1963 |
#endif
|
|
1964 |
||
1965 |
/* Clean prequeue, it must be empty really */
|
|
1966 |
__skb_queue_purge(&tp->ucopy.prequeue); |
|
1967 |
||
1968 |
/* Clean up a referenced TCP bind bucket. */
|
|
1969 |
if (inet_csk(sk)->icsk_bind_hash) |
|
1970 |
inet_put_port(sk); |
|
1971 |
||
1972 |
/*
|
|
1973 |
* If sendmsg cached page exists, toss it.
|
|
1974 |
*/
|
|
1975 |
if (sk->sk_sndmsg_page) { |
|
1976 |
__free_page(sk->sk_sndmsg_page); |
|
1977 |
sk->sk_sndmsg_page = NULL; |
|
1978 |
}
|
|
1979 |
||
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
1980 |
/* TCP Cookie Transactions */
|
1981 |
if (tp->cookie_values != NULL) { |
|
1982 |
kref_put(&tp->cookie_values->kref, |
|
1983 |
tcp_cookie_values_release); |
|
1984 |
tp->cookie_values = NULL; |
|
1985 |
}
|
|
1986 |
||
1.2.33
by Ben Hutchings
Import upstream version 3.3~rc6 |
1987 |
sk_sockets_allocated_dec(sk); |
1988 |
sock_release_memcg(sk); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
1989 |
}
|
1990 |
EXPORT_SYMBOL(tcp_v4_destroy_sock); |
|
1991 |
||
1992 |
#ifdef CONFIG_PROC_FS
|
|
1993 |
/* Proc filesystem TCP sock list dumping. */
|
|
1994 |
||
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
1995 |
static inline struct inet_timewait_sock *tw_head(struct hlist_nulls_head *head) |
1
by Bastian Blank
Import upstream version 2.6.26 |
1996 |
{
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
1997 |
return hlist_nulls_empty(head) ? NULL : |
1
by Bastian Blank
Import upstream version 2.6.26 |
1998 |
list_entry(head->first, struct inet_timewait_sock, tw_node); |
1999 |
}
|
|
2000 |
||
2001 |
static inline struct inet_timewait_sock *tw_next(struct inet_timewait_sock *tw) |
|
2002 |
{
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2003 |
return !is_a_nulls(tw->tw_node.next) ? |
2004 |
hlist_nulls_entry(tw->tw_node.next, typeof(*tw), tw_node) : NULL; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2005 |
}
|
2006 |
||
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2007 |
/*
|
2008 |
* Get next listener socket follow cur. If cur is NULL, get first socket
|
|
2009 |
* starting from bucket given in st->bucket; when st->bucket is zero the
|
|
2010 |
* very first socket in the hash table is returned.
|
|
2011 |
*/
|
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2012 |
static void *listening_get_next(struct seq_file *seq, void *cur) |
2013 |
{
|
|
2014 |
struct inet_connection_sock *icsk; |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2015 |
struct hlist_nulls_node *node; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2016 |
struct sock *sk = cur; |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2017 |
struct inet_listen_hashbucket *ilb; |
2018 |
struct tcp_iter_state *st = seq->private; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2019 |
struct net *net = seq_file_net(seq); |
2020 |
||
2021 |
if (!sk) { |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2022 |
ilb = &tcp_hashinfo.listening_hash[st->bucket]; |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2023 |
spin_lock_bh(&ilb->lock); |
2024 |
sk = sk_nulls_head(&ilb->head); |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2025 |
st->offset = 0; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2026 |
goto get_sk; |
2027 |
}
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2028 |
ilb = &tcp_hashinfo.listening_hash[st->bucket]; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2029 |
++st->num; |
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2030 |
++st->offset; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2031 |
|
2032 |
if (st->state == TCP_SEQ_STATE_OPENREQ) { |
|
2033 |
struct request_sock *req = cur; |
|
2034 |
||
2035 |
icsk = inet_csk(st->syn_wait_sk); |
|
2036 |
req = req->dl_next; |
|
2037 |
while (1) { |
|
2038 |
while (req) { |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
2039 |
if (req->rsk_ops->family == st->family) { |
1
by Bastian Blank
Import upstream version 2.6.26 |
2040 |
cur = req; |
2041 |
goto out; |
|
2042 |
}
|
|
2043 |
req = req->dl_next; |
|
2044 |
}
|
|
2045 |
if (++st->sbucket >= icsk->icsk_accept_queue.listen_opt->nr_table_entries) |
|
2046 |
break; |
|
2047 |
get_req: |
|
2048 |
req = icsk->icsk_accept_queue.listen_opt->syn_table[st->sbucket]; |
|
2049 |
}
|
|
1.2.13
by Ben Hutchings
Import upstream version 2.6.37 |
2050 |
sk = sk_nulls_next(st->syn_wait_sk); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2051 |
st->state = TCP_SEQ_STATE_LISTENING; |
2052 |
read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
|
2053 |
} else { |
|
2054 |
icsk = inet_csk(sk); |
|
2055 |
read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
|
2056 |
if (reqsk_queue_len(&icsk->icsk_accept_queue)) |
|
2057 |
goto start_req; |
|
2058 |
read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
|
1.2.13
by Ben Hutchings
Import upstream version 2.6.37 |
2059 |
sk = sk_nulls_next(sk); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2060 |
}
|
2061 |
get_sk: |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2062 |
sk_nulls_for_each_from(sk, node) { |
1.2.10
by Ben Hutchings
Import upstream version 2.6.37~rc4 |
2063 |
if (!net_eq(sock_net(sk), net)) |
2064 |
continue; |
|
2065 |
if (sk->sk_family == st->family) { |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2066 |
cur = sk; |
2067 |
goto out; |
|
2068 |
}
|
|
2069 |
icsk = inet_csk(sk); |
|
2070 |
read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
|
2071 |
if (reqsk_queue_len(&icsk->icsk_accept_queue)) { |
|
2072 |
start_req: |
|
2073 |
st->uid = sock_i_uid(sk); |
|
2074 |
st->syn_wait_sk = sk; |
|
2075 |
st->state = TCP_SEQ_STATE_OPENREQ; |
|
2076 |
st->sbucket = 0; |
|
2077 |
goto get_req; |
|
2078 |
}
|
|
2079 |
read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
|
2080 |
}
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2081 |
spin_unlock_bh(&ilb->lock); |
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2082 |
st->offset = 0; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2083 |
if (++st->bucket < INET_LHTABLE_SIZE) { |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2084 |
ilb = &tcp_hashinfo.listening_hash[st->bucket]; |
2085 |
spin_lock_bh(&ilb->lock); |
|
2086 |
sk = sk_nulls_head(&ilb->head); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2087 |
goto get_sk; |
2088 |
}
|
|
2089 |
cur = NULL; |
|
2090 |
out: |
|
2091 |
return cur; |
|
2092 |
}
|
|
2093 |
||
2094 |
static void *listening_get_idx(struct seq_file *seq, loff_t *pos) |
|
2095 |
{
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2096 |
struct tcp_iter_state *st = seq->private; |
2097 |
void *rc; |
|
2098 |
||
2099 |
st->bucket = 0; |
|
2100 |
st->offset = 0; |
|
2101 |
rc = listening_get_next(seq, NULL); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2102 |
|
2103 |
while (rc && *pos) { |
|
2104 |
rc = listening_get_next(seq, rc); |
|
2105 |
--*pos; |
|
2106 |
}
|
|
2107 |
return rc; |
|
2108 |
}
|
|
2109 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
2110 |
static inline int empty_bucket(struct tcp_iter_state *st) |
2111 |
{
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2112 |
return hlist_nulls_empty(&tcp_hashinfo.ehash[st->bucket].chain) && |
2113 |
hlist_nulls_empty(&tcp_hashinfo.ehash[st->bucket].twchain); |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
2114 |
}
|
2115 |
||
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2116 |
/*
|
2117 |
* Get first established socket starting from bucket given in st->bucket.
|
|
2118 |
* If st->bucket is zero, the very first socket in the hash is returned.
|
|
2119 |
*/
|
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2120 |
static void *established_get_first(struct seq_file *seq) |
2121 |
{
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2122 |
struct tcp_iter_state *st = seq->private; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2123 |
struct net *net = seq_file_net(seq); |
2124 |
void *rc = NULL; |
|
2125 |
||
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2126 |
st->offset = 0; |
2127 |
for (; st->bucket <= tcp_hashinfo.ehash_mask; ++st->bucket) { |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2128 |
struct sock *sk; |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2129 |
struct hlist_nulls_node *node; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2130 |
struct inet_timewait_sock *tw; |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2131 |
spinlock_t *lock = inet_ehash_lockp(&tcp_hashinfo, st->bucket); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2132 |
|
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
2133 |
/* Lockless fast path for the common case of empty buckets */
|
2134 |
if (empty_bucket(st)) |
|
2135 |
continue; |
|
2136 |
||
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2137 |
spin_lock_bh(lock); |
2138 |
sk_nulls_for_each(sk, node, &tcp_hashinfo.ehash[st->bucket].chain) { |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2139 |
if (sk->sk_family != st->family || |
2140 |
!net_eq(sock_net(sk), net)) { |
|
2141 |
continue; |
|
2142 |
}
|
|
2143 |
rc = sk; |
|
2144 |
goto out; |
|
2145 |
}
|
|
2146 |
st->state = TCP_SEQ_STATE_TIME_WAIT; |
|
2147 |
inet_twsk_for_each(tw, node, |
|
2148 |
&tcp_hashinfo.ehash[st->bucket].twchain) { |
|
2149 |
if (tw->tw_family != st->family || |
|
2150 |
!net_eq(twsk_net(tw), net)) { |
|
2151 |
continue; |
|
2152 |
}
|
|
2153 |
rc = tw; |
|
2154 |
goto out; |
|
2155 |
}
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2156 |
spin_unlock_bh(lock); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2157 |
st->state = TCP_SEQ_STATE_ESTABLISHED; |
2158 |
}
|
|
2159 |
out: |
|
2160 |
return rc; |
|
2161 |
}
|
|
2162 |
||
2163 |
static void *established_get_next(struct seq_file *seq, void *cur) |
|
2164 |
{
|
|
2165 |
struct sock *sk = cur; |
|
2166 |
struct inet_timewait_sock *tw; |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2167 |
struct hlist_nulls_node *node; |
2168 |
struct tcp_iter_state *st = seq->private; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2169 |
struct net *net = seq_file_net(seq); |
2170 |
||
2171 |
++st->num; |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2172 |
++st->offset; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2173 |
|
2174 |
if (st->state == TCP_SEQ_STATE_TIME_WAIT) { |
|
2175 |
tw = cur; |
|
2176 |
tw = tw_next(tw); |
|
2177 |
get_tw: |
|
2178 |
while (tw && (tw->tw_family != st->family || !net_eq(twsk_net(tw), net))) { |
|
2179 |
tw = tw_next(tw); |
|
2180 |
}
|
|
2181 |
if (tw) { |
|
2182 |
cur = tw; |
|
2183 |
goto out; |
|
2184 |
}
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2185 |
spin_unlock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket)); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2186 |
st->state = TCP_SEQ_STATE_ESTABLISHED; |
2187 |
||
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
2188 |
/* Look for next non empty bucket */
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2189 |
st->offset = 0; |
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
2190 |
while (++st->bucket <= tcp_hashinfo.ehash_mask && |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
2191 |
empty_bucket(st)) |
2192 |
;
|
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
2193 |
if (st->bucket > tcp_hashinfo.ehash_mask) |
1.1.1
by maximilian attems
Import upstream version 2.6.28 |
2194 |
return NULL; |
2195 |
||
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2196 |
spin_lock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket)); |
2197 |
sk = sk_nulls_head(&tcp_hashinfo.ehash[st->bucket].chain); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2198 |
} else |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2199 |
sk = sk_nulls_next(sk); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2200 |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2201 |
sk_nulls_for_each_from(sk, node) { |
1
by Bastian Blank
Import upstream version 2.6.26 |
2202 |
if (sk->sk_family == st->family && net_eq(sock_net(sk), net)) |
2203 |
goto found; |
|
2204 |
}
|
|
2205 |
||
2206 |
st->state = TCP_SEQ_STATE_TIME_WAIT; |
|
2207 |
tw = tw_head(&tcp_hashinfo.ehash[st->bucket].twchain); |
|
2208 |
goto get_tw; |
|
2209 |
found: |
|
2210 |
cur = sk; |
|
2211 |
out: |
|
2212 |
return cur; |
|
2213 |
}
|
|
2214 |
||
2215 |
static void *established_get_idx(struct seq_file *seq, loff_t pos) |
|
2216 |
{
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2217 |
struct tcp_iter_state *st = seq->private; |
2218 |
void *rc; |
|
2219 |
||
2220 |
st->bucket = 0; |
|
2221 |
rc = established_get_first(seq); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2222 |
|
2223 |
while (rc && pos) { |
|
2224 |
rc = established_get_next(seq, rc); |
|
2225 |
--pos; |
|
2226 |
}
|
|
2227 |
return rc; |
|
2228 |
}
|
|
2229 |
||
2230 |
static void *tcp_get_idx(struct seq_file *seq, loff_t pos) |
|
2231 |
{
|
|
2232 |
void *rc; |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2233 |
struct tcp_iter_state *st = seq->private; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2234 |
|
2235 |
st->state = TCP_SEQ_STATE_LISTENING; |
|
2236 |
rc = listening_get_idx(seq, &pos); |
|
2237 |
||
2238 |
if (!rc) { |
|
2239 |
st->state = TCP_SEQ_STATE_ESTABLISHED; |
|
2240 |
rc = established_get_idx(seq, pos); |
|
2241 |
}
|
|
2242 |
||
2243 |
return rc; |
|
2244 |
}
|
|
2245 |
||
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2246 |
static void *tcp_seek_last_pos(struct seq_file *seq) |
2247 |
{
|
|
2248 |
struct tcp_iter_state *st = seq->private; |
|
2249 |
int offset = st->offset; |
|
2250 |
int orig_num = st->num; |
|
2251 |
void *rc = NULL; |
|
2252 |
||
2253 |
switch (st->state) { |
|
2254 |
case TCP_SEQ_STATE_OPENREQ: |
|
2255 |
case TCP_SEQ_STATE_LISTENING: |
|
2256 |
if (st->bucket >= INET_LHTABLE_SIZE) |
|
2257 |
break; |
|
2258 |
st->state = TCP_SEQ_STATE_LISTENING; |
|
2259 |
rc = listening_get_next(seq, NULL); |
|
2260 |
while (offset-- && rc) |
|
2261 |
rc = listening_get_next(seq, rc); |
|
2262 |
if (rc) |
|
2263 |
break; |
|
2264 |
st->bucket = 0; |
|
2265 |
/* Fallthrough */
|
|
2266 |
case TCP_SEQ_STATE_ESTABLISHED: |
|
2267 |
case TCP_SEQ_STATE_TIME_WAIT: |
|
2268 |
st->state = TCP_SEQ_STATE_ESTABLISHED; |
|
2269 |
if (st->bucket > tcp_hashinfo.ehash_mask) |
|
2270 |
break; |
|
2271 |
rc = established_get_first(seq); |
|
2272 |
while (offset-- && rc) |
|
2273 |
rc = established_get_next(seq, rc); |
|
2274 |
}
|
|
2275 |
||
2276 |
st->num = orig_num; |
|
2277 |
||
2278 |
return rc; |
|
2279 |
}
|
|
2280 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
2281 |
static void *tcp_seq_start(struct seq_file *seq, loff_t *pos) |
2282 |
{
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2283 |
struct tcp_iter_state *st = seq->private; |
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2284 |
void *rc; |
2285 |
||
2286 |
if (*pos && *pos == st->last_pos) { |
|
2287 |
rc = tcp_seek_last_pos(seq); |
|
2288 |
if (rc) |
|
2289 |
goto out; |
|
2290 |
}
|
|
2291 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
2292 |
st->state = TCP_SEQ_STATE_LISTENING; |
2293 |
st->num = 0; |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2294 |
st->bucket = 0; |
2295 |
st->offset = 0; |
|
2296 |
rc = *pos ? tcp_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
|
2297 |
||
2298 |
out: |
|
2299 |
st->last_pos = *pos; |
|
2300 |
return rc; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2301 |
}
|
2302 |
||
2303 |
static void *tcp_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
|
2304 |
{
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2305 |
struct tcp_iter_state *st = seq->private; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2306 |
void *rc = NULL; |
2307 |
||
2308 |
if (v == SEQ_START_TOKEN) { |
|
2309 |
rc = tcp_get_idx(seq, 0); |
|
2310 |
goto out; |
|
2311 |
}
|
|
2312 |
||
2313 |
switch (st->state) { |
|
2314 |
case TCP_SEQ_STATE_OPENREQ: |
|
2315 |
case TCP_SEQ_STATE_LISTENING: |
|
2316 |
rc = listening_get_next(seq, v); |
|
2317 |
if (!rc) { |
|
2318 |
st->state = TCP_SEQ_STATE_ESTABLISHED; |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2319 |
st->bucket = 0; |
2320 |
st->offset = 0; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2321 |
rc = established_get_first(seq); |
2322 |
}
|
|
2323 |
break; |
|
2324 |
case TCP_SEQ_STATE_ESTABLISHED: |
|
2325 |
case TCP_SEQ_STATE_TIME_WAIT: |
|
2326 |
rc = established_get_next(seq, v); |
|
2327 |
break; |
|
2328 |
}
|
|
2329 |
out: |
|
2330 |
++*pos; |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2331 |
st->last_pos = *pos; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2332 |
return rc; |
2333 |
}
|
|
2334 |
||
2335 |
static void tcp_seq_stop(struct seq_file *seq, void *v) |
|
2336 |
{
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2337 |
struct tcp_iter_state *st = seq->private; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2338 |
|
2339 |
switch (st->state) { |
|
2340 |
case TCP_SEQ_STATE_OPENREQ: |
|
2341 |
if (v) { |
|
2342 |
struct inet_connection_sock *icsk = inet_csk(st->syn_wait_sk); |
|
2343 |
read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
|
2344 |
}
|
|
2345 |
case TCP_SEQ_STATE_LISTENING: |
|
2346 |
if (v != SEQ_START_TOKEN) |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2347 |
spin_unlock_bh(&tcp_hashinfo.listening_hash[st->bucket].lock); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2348 |
break; |
2349 |
case TCP_SEQ_STATE_TIME_WAIT: |
|
2350 |
case TCP_SEQ_STATE_ESTABLISHED: |
|
2351 |
if (v) |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2352 |
spin_unlock_bh(inet_ehash_lockp(&tcp_hashinfo, st->bucket)); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2353 |
break; |
2354 |
}
|
|
2355 |
}
|
|
2356 |
||
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2357 |
int tcp_seq_open(struct inode *inode, struct file *file) |
1
by Bastian Blank
Import upstream version 2.6.26 |
2358 |
{
|
2359 |
struct tcp_seq_afinfo *afinfo = PDE(inode)->data; |
|
2360 |
struct tcp_iter_state *s; |
|
2361 |
int err; |
|
2362 |
||
2363 |
err = seq_open_net(inode, file, &afinfo->seq_ops, |
|
2364 |
sizeof(struct tcp_iter_state)); |
|
2365 |
if (err < 0) |
|
2366 |
return err; |
|
2367 |
||
2368 |
s = ((struct seq_file *)file->private_data)->private; |
|
2369 |
s->family = afinfo->family; |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2370 |
s->last_pos = 0; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2371 |
return 0; |
2372 |
}
|
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2373 |
EXPORT_SYMBOL(tcp_seq_open); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2374 |
|
2375 |
int tcp_proc_register(struct net *net, struct tcp_seq_afinfo *afinfo) |
|
2376 |
{
|
|
2377 |
int rc = 0; |
|
2378 |
struct proc_dir_entry *p; |
|
2379 |
||
2380 |
afinfo->seq_ops.start = tcp_seq_start; |
|
2381 |
afinfo->seq_ops.next = tcp_seq_next; |
|
2382 |
afinfo->seq_ops.stop = tcp_seq_stop; |
|
2383 |
||
2384 |
p = proc_create_data(afinfo->name, S_IRUGO, net->proc_net, |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2385 |
afinfo->seq_fops, afinfo); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2386 |
if (!p) |
2387 |
rc = -ENOMEM; |
|
2388 |
return rc; |
|
2389 |
}
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2390 |
EXPORT_SYMBOL(tcp_proc_register); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2391 |
|
2392 |
void tcp_proc_unregister(struct net *net, struct tcp_seq_afinfo *afinfo) |
|
2393 |
{
|
|
2394 |
proc_net_remove(net, afinfo->name); |
|
2395 |
}
|
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2396 |
EXPORT_SYMBOL(tcp_proc_unregister); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2397 |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2398 |
static void get_openreq4(const struct sock *sk, const struct request_sock *req, |
1
by Bastian Blank
Import upstream version 2.6.26 |
2399 |
struct seq_file *f, int i, int uid, int *len) |
2400 |
{
|
|
2401 |
const struct inet_request_sock *ireq = inet_rsk(req); |
|
2402 |
int ttd = req->expires - jiffies; |
|
2403 |
||
2404 |
seq_printf(f, "%4d: %08X:%04X %08X:%04X" |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
2405 |
" %02X %08X:%08X %02X:%08lX %08X %5d %8d %u %d %pK%n", |
1
by Bastian Blank
Import upstream version 2.6.26 |
2406 |
i, |
2407 |
ireq->loc_addr, |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
2408 |
ntohs(inet_sk(sk)->inet_sport), |
1
by Bastian Blank
Import upstream version 2.6.26 |
2409 |
ireq->rmt_addr, |
2410 |
ntohs(ireq->rmt_port), |
|
2411 |
TCP_SYN_RECV, |
|
2412 |
0, 0, /* could print option size, but that is af dependent. */ |
|
2413 |
1, /* timers active (only the expire timer) */ |
|
2414 |
jiffies_to_clock_t(ttd), |
|
2415 |
req->retrans, |
|
2416 |
uid, |
|
2417 |
0, /* non standard timer */ |
|
2418 |
0, /* open_requests have no inode */ |
|
2419 |
atomic_read(&sk->sk_refcnt), |
|
2420 |
req, |
|
2421 |
len); |
|
2422 |
}
|
|
2423 |
||
2424 |
static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len) |
|
2425 |
{
|
|
2426 |
int timer_active; |
|
2427 |
unsigned long timer_expires; |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2428 |
const struct tcp_sock *tp = tcp_sk(sk); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2429 |
const struct inet_connection_sock *icsk = inet_csk(sk); |
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2430 |
const struct inet_sock *inet = inet_sk(sk); |
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
2431 |
__be32 dest = inet->inet_daddr; |
2432 |
__be32 src = inet->inet_rcv_saddr; |
|
2433 |
__u16 destp = ntohs(inet->inet_dport); |
|
2434 |
__u16 srcp = ntohs(inet->inet_sport); |
|
2435 |
int rx_queue; |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2436 |
|
2437 |
if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
|
2438 |
timer_active = 1; |
|
2439 |
timer_expires = icsk->icsk_timeout; |
|
2440 |
} else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
|
2441 |
timer_active = 4; |
|
2442 |
timer_expires = icsk->icsk_timeout; |
|
2443 |
} else if (timer_pending(&sk->sk_timer)) { |
|
2444 |
timer_active = 2; |
|
2445 |
timer_expires = sk->sk_timer.expires; |
|
2446 |
} else { |
|
2447 |
timer_active = 0; |
|
2448 |
timer_expires = jiffies; |
|
2449 |
}
|
|
2450 |
||
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
2451 |
if (sk->sk_state == TCP_LISTEN) |
2452 |
rx_queue = sk->sk_ack_backlog; |
|
2453 |
else
|
|
2454 |
/*
|
|
2455 |
* because we dont lock socket, we might find a transient negative value
|
|
2456 |
*/
|
|
2457 |
rx_queue = max_t(int, tp->rcv_nxt - tp->copied_seq, 0); |
|
2458 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
2459 |
seq_printf(f, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX " |
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
2460 |
"%08X %5d %8d %lu %d %pK %lu %lu %u %u %d%n", |
1
by Bastian Blank
Import upstream version 2.6.26 |
2461 |
i, src, srcp, dest, destp, sk->sk_state, |
2462 |
tp->write_seq - tp->snd_una, |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
2463 |
rx_queue, |
1
by Bastian Blank
Import upstream version 2.6.26 |
2464 |
timer_active, |
2465 |
jiffies_to_clock_t(timer_expires - jiffies), |
|
2466 |
icsk->icsk_retransmits, |
|
2467 |
sock_i_uid(sk), |
|
2468 |
icsk->icsk_probes_out, |
|
2469 |
sock_i_ino(sk), |
|
2470 |
atomic_read(&sk->sk_refcnt), sk, |
|
2471 |
jiffies_to_clock_t(icsk->icsk_rto), |
|
2472 |
jiffies_to_clock_t(icsk->icsk_ack.ato), |
|
2473 |
(icsk->icsk_ack.quick << 1) | icsk->icsk_ack.pingpong, |
|
2474 |
tp->snd_cwnd, |
|
1.1.5
by Bastian Blank
Import upstream version 2.6.32~rc8 |
2475 |
tcp_in_initial_slowstart(tp) ? -1 : tp->snd_ssthresh, |
1
by Bastian Blank
Import upstream version 2.6.26 |
2476 |
len); |
2477 |
}
|
|
2478 |
||
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2479 |
static void get_timewait4_sock(const struct inet_timewait_sock *tw, |
1
by Bastian Blank
Import upstream version 2.6.26 |
2480 |
struct seq_file *f, int i, int *len) |
2481 |
{
|
|
2482 |
__be32 dest, src; |
|
2483 |
__u16 destp, srcp; |
|
2484 |
int ttd = tw->tw_ttd - jiffies; |
|
2485 |
||
2486 |
if (ttd < 0) |
|
2487 |
ttd = 0; |
|
2488 |
||
2489 |
dest = tw->tw_daddr; |
|
2490 |
src = tw->tw_rcv_saddr; |
|
2491 |
destp = ntohs(tw->tw_dport); |
|
2492 |
srcp = ntohs(tw->tw_sport); |
|
2493 |
||
2494 |
seq_printf(f, "%4d: %08X:%04X %08X:%04X" |
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
2495 |
" %02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %pK%n", |
1
by Bastian Blank
Import upstream version 2.6.26 |
2496 |
i, src, srcp, dest, destp, tw->tw_substate, 0, 0, |
2497 |
3, jiffies_to_clock_t(ttd), 0, 0, 0, 0, |
|
2498 |
atomic_read(&tw->tw_refcnt), tw, len); |
|
2499 |
}
|
|
2500 |
||
2501 |
#define TMPSZ 150
|
|
2502 |
||
2503 |
static int tcp4_seq_show(struct seq_file *seq, void *v) |
|
2504 |
{
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2505 |
struct tcp_iter_state *st; |
1
by Bastian Blank
Import upstream version 2.6.26 |
2506 |
int len; |
2507 |
||
2508 |
if (v == SEQ_START_TOKEN) { |
|
2509 |
seq_printf(seq, "%-*s\n", TMPSZ - 1, |
|
2510 |
" sl local_address rem_address st tx_queue "
|
|
2511 |
"rx_queue tr tm->when retrnsmt uid timeout "
|
|
2512 |
"inode"); |
|
2513 |
goto out; |
|
2514 |
}
|
|
2515 |
st = seq->private; |
|
2516 |
||
2517 |
switch (st->state) { |
|
2518 |
case TCP_SEQ_STATE_LISTENING: |
|
2519 |
case TCP_SEQ_STATE_ESTABLISHED: |
|
2520 |
get_tcp4_sock(v, seq, st->num, &len); |
|
2521 |
break; |
|
2522 |
case TCP_SEQ_STATE_OPENREQ: |
|
2523 |
get_openreq4(st->syn_wait_sk, v, seq, st->num, st->uid, &len); |
|
2524 |
break; |
|
2525 |
case TCP_SEQ_STATE_TIME_WAIT: |
|
2526 |
get_timewait4_sock(v, seq, st->num, &len); |
|
2527 |
break; |
|
2528 |
}
|
|
2529 |
seq_printf(seq, "%*s\n", TMPSZ - 1 - len, ""); |
|
2530 |
out: |
|
2531 |
return 0; |
|
2532 |
}
|
|
2533 |
||
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2534 |
static const struct file_operations tcp_afinfo_seq_fops = { |
2535 |
.owner = THIS_MODULE, |
|
2536 |
.open = tcp_seq_open, |
|
2537 |
.read = seq_read, |
|
2538 |
.llseek = seq_lseek, |
|
2539 |
.release = seq_release_net |
|
2540 |
};
|
|
2541 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
2542 |
static struct tcp_seq_afinfo tcp4_seq_afinfo = { |
2543 |
.name = "tcp", |
|
2544 |
.family = AF_INET, |
|
1.2.31
by Ben Hutchings
Import upstream version 3.2~rc4 |
2545 |
.seq_fops = &tcp_afinfo_seq_fops, |
1
by Bastian Blank
Import upstream version 2.6.26 |
2546 |
.seq_ops = { |
2547 |
.show = tcp4_seq_show, |
|
2548 |
},
|
|
2549 |
};
|
|
2550 |
||
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
2551 |
static int __net_init tcp4_proc_init_net(struct net *net) |
1
by Bastian Blank
Import upstream version 2.6.26 |
2552 |
{
|
2553 |
return tcp_proc_register(net, &tcp4_seq_afinfo); |
|
2554 |
}
|
|
2555 |
||
1.2.2
by maximilian attems
Import upstream version 2.6.34 |
2556 |
static void __net_exit tcp4_proc_exit_net(struct net *net) |
1
by Bastian Blank
Import upstream version 2.6.26 |
2557 |
{
|
2558 |
tcp_proc_unregister(net, &tcp4_seq_afinfo); |
|
2559 |
}
|
|
2560 |
||
2561 |
static struct pernet_operations tcp4_net_ops = { |
|
2562 |
.init = tcp4_proc_init_net, |
|
2563 |
.exit = tcp4_proc_exit_net, |
|
2564 |
};
|
|
2565 |
||
2566 |
int __init tcp4_proc_init(void) |
|
2567 |
{
|
|
2568 |
return register_pernet_subsys(&tcp4_net_ops); |
|
2569 |
}
|
|
2570 |
||
2571 |
void tcp4_proc_exit(void) |
|
2572 |
{
|
|
2573 |
unregister_pernet_subsys(&tcp4_net_ops); |
|
2574 |
}
|
|
2575 |
#endif /* CONFIG_PROC_FS */ |
|
2576 |
||
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2577 |
struct sk_buff **tcp4_gro_receive(struct sk_buff **head, struct sk_buff *skb) |
2578 |
{
|
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
2579 |
const struct iphdr *iph = skb_gro_network_header(skb); |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2580 |
|
2581 |
switch (skb->ip_summed) { |
|
2582 |
case CHECKSUM_COMPLETE: |
|
1.1.3
by Bastian Blank
Import upstream version 2.6.30 |
2583 |
if (!tcp_v4_check(skb_gro_len(skb), iph->saddr, iph->daddr, |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2584 |
skb->csum)) { |
2585 |
skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
2586 |
break; |
|
2587 |
}
|
|
2588 |
||
2589 |
/* fall through */
|
|
2590 |
case CHECKSUM_NONE: |
|
2591 |
NAPI_GRO_CB(skb)->flush = 1; |
|
2592 |
return NULL; |
|
2593 |
}
|
|
2594 |
||
2595 |
return tcp_gro_receive(head, skb); |
|
2596 |
}
|
|
2597 |
||
2598 |
int tcp4_gro_complete(struct sk_buff *skb) |
|
2599 |
{
|
|
1.2.21
by Ben Hutchings
Import upstream version 3.0.0~rc1 |
2600 |
const struct iphdr *iph = ip_hdr(skb); |
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2601 |
struct tcphdr *th = tcp_hdr(skb); |
2602 |
||
2603 |
th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb), |
|
2604 |
iph->saddr, iph->daddr, 0); |
|
2605 |
skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4; |
|
2606 |
||
2607 |
return tcp_gro_complete(skb); |
|
2608 |
}
|
|
2609 |
||
1
by Bastian Blank
Import upstream version 2.6.26 |
2610 |
struct proto tcp_prot = { |
2611 |
.name = "TCP", |
|
2612 |
.owner = THIS_MODULE, |
|
2613 |
.close = tcp_close, |
|
2614 |
.connect = tcp_v4_connect, |
|
2615 |
.disconnect = tcp_disconnect, |
|
2616 |
.accept = inet_csk_accept, |
|
2617 |
.ioctl = tcp_ioctl, |
|
2618 |
.init = tcp_v4_init_sock, |
|
2619 |
.destroy = tcp_v4_destroy_sock, |
|
2620 |
.shutdown = tcp_shutdown, |
|
2621 |
.setsockopt = tcp_setsockopt, |
|
2622 |
.getsockopt = tcp_getsockopt, |
|
2623 |
.recvmsg = tcp_recvmsg, |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2624 |
.sendmsg = tcp_sendmsg, |
2625 |
.sendpage = tcp_sendpage, |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2626 |
.backlog_rcv = tcp_v4_do_rcv, |
2627 |
.hash = inet_hash, |
|
2628 |
.unhash = inet_unhash, |
|
2629 |
.get_port = inet_csk_get_port, |
|
2630 |
.enter_memory_pressure = tcp_enter_memory_pressure, |
|
2631 |
.sockets_allocated = &tcp_sockets_allocated, |
|
2632 |
.orphan_count = &tcp_orphan_count, |
|
2633 |
.memory_allocated = &tcp_memory_allocated, |
|
2634 |
.memory_pressure = &tcp_memory_pressure, |
|
2635 |
.sysctl_wmem = sysctl_tcp_wmem, |
|
2636 |
.sysctl_rmem = sysctl_tcp_rmem, |
|
2637 |
.max_header = MAX_TCP_HEADER, |
|
2638 |
.obj_size = sizeof(struct tcp_sock), |
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2639 |
.slab_flags = SLAB_DESTROY_BY_RCU, |
1
by Bastian Blank
Import upstream version 2.6.26 |
2640 |
.twsk_prot = &tcp_timewait_sock_ops, |
2641 |
.rsk_prot = &tcp_request_sock_ops, |
|
2642 |
.h.hashinfo = &tcp_hashinfo, |
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2643 |
.no_autobind = true, |
1
by Bastian Blank
Import upstream version 2.6.26 |
2644 |
#ifdef CONFIG_COMPAT
|
2645 |
.compat_setsockopt = compat_tcp_setsockopt, |
|
2646 |
.compat_getsockopt = compat_tcp_getsockopt, |
|
2647 |
#endif
|
|
1.2.33
by Ben Hutchings
Import upstream version 3.3~rc6 |
2648 |
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
|
2649 |
.init_cgroup = tcp_init_cgroup, |
|
2650 |
.destroy_cgroup = tcp_destroy_cgroup, |
|
2651 |
.proto_cgroup = tcp_proto_cgroup, |
|
2652 |
#endif
|
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2653 |
};
|
1.2.7
by Ben Hutchings
Import upstream version 2.6.36~rc5 |
2654 |
EXPORT_SYMBOL(tcp_prot); |
1
by Bastian Blank
Import upstream version 2.6.26 |
2655 |
|
2656 |
static int __net_init tcp_sk_init(struct net *net) |
|
2657 |
{
|
|
2658 |
return inet_ctl_sock_create(&net->ipv4.tcp_sock, |
|
2659 |
PF_INET, SOCK_RAW, IPPROTO_TCP, net); |
|
2660 |
}
|
|
2661 |
||
2662 |
static void __net_exit tcp_sk_exit(struct net *net) |
|
2663 |
{
|
|
2664 |
inet_ctl_sock_destroy(net->ipv4.tcp_sock); |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
2665 |
}
|
2666 |
||
2667 |
static void __net_exit tcp_sk_exit_batch(struct list_head *net_exit_list) |
|
2668 |
{
|
|
2669 |
inet_twsk_purge(&tcp_hashinfo, &tcp_death_row, AF_INET); |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2670 |
}
|
2671 |
||
2672 |
static struct pernet_operations __net_initdata tcp_sk_ops = { |
|
1.2.1
by maximilian attems
Import upstream version 2.6.33 |
2673 |
.init = tcp_sk_init, |
2674 |
.exit = tcp_sk_exit, |
|
2675 |
.exit_batch = tcp_sk_exit_batch, |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2676 |
};
|
2677 |
||
2678 |
void __init tcp_v4_init(void) |
|
2679 |
{
|
|
1.1.2
by Bastian Blank
Import upstream version 2.6.29 |
2680 |
inet_hashinfo_init(&tcp_hashinfo); |
2681 |
if (register_pernet_subsys(&tcp_sk_ops)) |
|
1
by Bastian Blank
Import upstream version 2.6.26 |
2682 |
panic("Failed to create the TCP control socket.\n"); |
2683 |
}
|