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Comparing gvpe/src/vpn_tcp.C (file contents):
Revision 1.12 by pcg, Thu Mar 3 16:54:34 2005 UTC vs.
Revision 1.19 by pcg, Tue Nov 13 02:12:08 2007 UTC

1/* 1/*
2 vpn_tcp.C -- handle the tcp part of the protocol. 2 vpn_tcp.C -- handle the tcp part of the protocol.
3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> 3 Copyright (C) 2003-2007 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE. 5 This file is part of GVPE.
6 6
7 GVPE is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by 8 it under the terms of the GNU General Public License as published by
… …
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 15 GNU General Public License for more details.
16 16
17 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License
18 along with gvpe; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
19 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20*/ 20*/
21 21
22#include "config.h" 22#include "config.h"
23 23
24#if ENABLE_TCP 24#if ENABLE_TCP
25 25
26// tcp processing is extremely ugly, since the vpe protocol is simply 26// tcp processing is extremely ugly, since the gvpe protocol is simply
27// designed for unreliable datagram networks. tcp is implemented by 27// designed for unreliable datagram networks. tcp is implemented by
28// multiplexing packets over tcp. errors are completely ignored, as we 28// multiplexing packets over tcp. errors are completely ignored, as we
29// rely on the higher level protocol to time out and reconnect. 29// rely on the higher level layers to time out and reconnect.
30 30
31#include <cstring> 31#include <cstring>
32 32
33#include <sys/types.h> 33#include <sys/types.h>
34#include <sys/socket.h> 34#include <sys/socket.h>
… …
58 return *a < *b; 58 return *a < *b;
59 } 59 }
60}; 60};
61 61
62struct tcp_si_map : public map<const sockinfo *, tcp_connection *, lt_sockinfo> { 62struct tcp_si_map : public map<const sockinfo *, tcp_connection *, lt_sockinfo> {
63 void cleaner_cb (time_watcher &w); time_watcher cleaner; 63 void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;
64 64
65 tcp_si_map () 65 tcp_si_map ()
66 : cleaner(this, &tcp_si_map::cleaner_cb) 66 : cleaner(this, &tcp_si_map::cleaner_cb)
67 { 67 {
68 cleaner.start (0); 68 cleaner.start (::conf.keepalive / 2, ::conf.keepalive / 2);
69 } 69 }
70
70} tcp_si; 71} tcp_si;
71 72
72struct tcp_connection : io_watcher { 73struct tcp_connection : ev::io {
73 tstamp last_activity; 74 tstamp last_activity;
74 const sockinfo si; 75 const sockinfo si;
75 vpn &v; 76 vpn &v;
76 bool active; // this connection has been actively established 77 bool active; // this connection has been actively established
77 enum { ERROR, IDLE, CONNECTING, CONNECTING_PROXY, ESTABLISHED } state; 78 enum { ERROR, IDLE, CONNECTING, CONNECTING_PROXY, ESTABLISHED } state;
… …
85#if ENABLE_HTTP_PROXY 86#if ENABLE_HTTP_PROXY
86 char *proxy_req; 87 char *proxy_req;
87 int proxy_req_len; 88 int proxy_req_len;
88#endif 89#endif
89 90
90 void tcpv4_ev (io_watcher &w, short revents); 91 void tcpv4_ev (ev::io &w, int revents);
91 92
92 bool send_packet (vpn_packet *pkt, int tos); 93 bool send_packet (vpn_packet *pkt, int tos);
93 bool write_packet (); 94 bool write_packet ();
94 95
95 void error (); // abort conenction && cleanup 96 void error (); // abort conenction && cleanup
96 97
97 operator tcp_si_map::value_type() 98 operator tcp_si_map::value_type()
98 { 99 {
99 return tcp_si_map::value_type (&si, this); 100 return tcp_si_map::value_type (&si, this);
100 } 101 }
101 102
102 tcp_connection (int fd_, const sockinfo &si_, vpn &v_); 103 tcp_connection (int fd_, const sockinfo &si_, vpn &v_);
103 ~tcp_connection (); 104 ~tcp_connection ();
104}; 105};
105 106
106void tcp_si_map::cleaner_cb (time_watcher &w) 107void tcp_si_map::cleaner_cb (ev::timer &w, int revents)
107{ 108{
108 w.start (NOW + 600);
109
110 tstamp to = NOW - ::conf.keepalive - 30 - 60; 109 tstamp to = ev::ev_now () - ::conf.keepalive - 30 - 60;
111 110
112 for (iterator i = begin (); i != end(); ) 111 for (iterator i = begin (); i != end(); )
113 if (i->second->last_activity >= to) 112 if (i->second->last_activity >= to)
114 ++i; 113 ++i;
115 else 114 else
116 { 115 {
116 delete i->second;
117 erase (i); 117 erase (i);
118 i = begin (); 118 i = begin ();
119 } 119 }
120} 120}
121 121
122void 122void
123vpn::tcpv4_ev (io_watcher &w, short revents) 123vpn::tcpv4_ev (ev::io &w, int revents)
124{ 124{
125 if (revents & EVENT_READ) 125 if (revents & EV_READ)
126 { 126 {
127 struct sockaddr_in sa; 127 struct sockaddr_in sa;
128 socklen_t sa_len = sizeof (sa); 128 socklen_t sa_len = sizeof (sa);
129 int len; 129 int len;
130 130
131 int fd = accept (w.fd, (sockaddr *)&sa, &sa_len); 131 int fd = accept (w.fd, (sockaddr *)&sa, &sa_len);
132 132
133 if (fd >= 0) 133 if (fd >= 0)
134 { 134 {
135 fcntl (fd, F_SETFL, O_NONBLOCK);
136 fcntl (fd, F_SETFD, FD_CLOEXEC);
137
135 sockinfo si(sa, PROT_TCPv4); 138 sockinfo si(sa, PROT_TCPv4);
136 139
137 slog (L_DEBUG, _("%s: accepted tcp connection"), (const char *)si);//D 140 slog (L_DEBUG, _("%s: accepted tcp connection"), (const char *)si);//D
138
139 fcntl (fd, F_SETFL, O_NONBLOCK);
140 141
141 tcp_connection *i = new tcp_connection (fd, si, *this); 142 tcp_connection *i = new tcp_connection (fd, si, *this);
142 tcp_si.insert (*i); 143 tcp_si.insert (*i);
143 } 144 }
144 } 145 }
… …
198 return false; 199 return false;
199 } 200 }
200} 201}
201 202
202void 203void
203tcp_connection::tcpv4_ev (io_watcher &w, short revents) 204tcp_connection::tcpv4_ev (ev::io &w, int revents)
204{ 205{
205 last_activity = NOW; 206 last_activity = ev::ev_now ();
206 207
207 if (revents & EVENT_WRITE) 208 if (revents & EV_WRITE)
208 { 209 {
209 if (state == CONNECTING) 210 if (state == CONNECTING)
210 { 211 {
211 state = ESTABLISHED; 212 state = ESTABLISHED;
212 set (EVENT_READ); 213 set (EV_READ);
213#if ENABLE_HTTP_PROXY 214#if ENABLE_HTTP_PROXY
214 if (::conf.proxy_host && ::conf.proxy_port) 215 if (::conf.proxy_host && ::conf.proxy_port)
215 { 216 {
216 state = CONNECTING_PROXY; 217 state = CONNECTING_PROXY;
217 218
… …
231 { 232 {
232 if (write_packet ()) 233 if (write_packet ())
233 { 234 {
234 delete w_pkt; w_pkt = 0; 235 delete w_pkt; w_pkt = 0;
235 236
236 set (EVENT_READ); 237 set (EV_READ);
237 } 238 }
238 } 239 }
239 else 240 else
240 set (EVENT_READ); 241 set (EV_READ);
241 } 242 }
242 else 243 else
243 set (EVENT_READ); 244 set (EV_READ);
244 } 245 }
245 246
246 if (revents & EVENT_READ) 247 if (revents & EV_READ)
247 { 248 {
248 if (state == ESTABLISHED) 249 if (state == ESTABLISHED)
249 for (;;) 250 for (;;)
250 { 251 {
251 if (!r_pkt) 252 if (!r_pkt)
… …
345} 346}
346 347
347bool 348bool
348tcp_connection::send_packet (vpn_packet *pkt, int tos) 349tcp_connection::send_packet (vpn_packet *pkt, int tos)
349{ 350{
350 last_activity = NOW; 351 last_activity = ev::ev_now ();
351 352
352 if (state == IDLE) 353 if (state == IDLE)
353 { 354 {
354 // woaw, the first lost packet ;) 355 // woaw, the first lost packet ;)
355 fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); 356 fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
… …
389 fcntl (fd, F_SETFL, O_NONBLOCK); 390 fcntl (fd, F_SETFL, O_NONBLOCK);
390 391
391 if (connect (fd, csi->sav4 (), csi->salenv4 ()) >= 0 392 if (connect (fd, csi->sav4 (), csi->salenv4 ()) >= 0
392 || errno == EINPROGRESS) 393 || errno == EINPROGRESS)
393 { 394 {
395 fcntl (fd, F_SETFL, O_NONBLOCK);
396 fcntl (fd, F_SETFD, FD_CLOEXEC);
397
394 state = CONNECTING; 398 state = CONNECTING;
395 start (fd, EVENT_WRITE); 399 start (fd, EV_WRITE);
396 } 400 }
397 else 401 else
398 close (fd); 402 close (fd);
399 } 403 }
400 } 404 }
… …
419 else 423 else
420 { 424 {
421 w_pkt = new vpn_packet; 425 w_pkt = new vpn_packet;
422 w_pkt->set (*pkt); 426 w_pkt->set (*pkt);
423 427
424 set (EVENT_READ | EVENT_WRITE); 428 set (EV_READ | EV_WRITE);
425 } 429 }
426 } 430 }
427 } 431 }
428 432
429 return state != ERROR; 433 return state != ERROR;
430} 434}
431 435
432void tcp_connection::error () 436void tcp_connection::error ()
433{ 437{
438 stop ();
439
434 if (fd >= 0) 440 if (fd >= 0)
435 { 441 {
436 close (fd); 442 close (fd);
437 fd = -1; 443 fd = -1;
438 } 444 }
… …
441 delete w_pkt; w_pkt = 0; 447 delete w_pkt; w_pkt = 0;
442#if ENABLE_HTTP_PROXY 448#if ENABLE_HTTP_PROXY
443 free (proxy_req); proxy_req = 0; 449 free (proxy_req); proxy_req = 0;
444#endif 450#endif
445 451
446 stop ();
447 state = active ? IDLE : ERROR; 452 state = active ? IDLE : ERROR;
448} 453}
449 454
450tcp_connection::tcp_connection (int fd_, const sockinfo &si_, vpn &v_) 455tcp_connection::tcp_connection (int fd_, const sockinfo &si_, vpn &v_)
451: v(v_), si(si_), io_watcher(this, &tcp_connection::tcpv4_ev) 456: v(v_), si(si_), ev::io(this, &tcp_connection::tcpv4_ev)
452{ 457{
453 last_activity = NOW; 458 last_activity = ev::ev_now ();
454 r_pkt = 0; 459 r_pkt = 0;
455 w_pkt = 0; 460 w_pkt = 0;
456 fd = fd_; 461 fd = fd_;
457#if ENABLE_HTTP_PROXY 462#if ENABLE_HTTP_PROXY
458 proxy_req = 0; 463 proxy_req = 0;
… …
465 } 470 }
466 else 471 else
467 { 472 {
468 active = false; 473 active = false;
469 state = ESTABLISHED; 474 state = ESTABLISHED;
470 start (fd, EVENT_READ); 475 start (fd, EV_READ);
471 } 476 }
472} 477}
473 478
474tcp_connection::~tcp_connection () 479tcp_connection::~tcp_connection ()
475{ 480{

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