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Comparing gvpe/src/vpn_tcp.C (file contents):
Revision 1.13 by pcg, Wed Mar 23 20:07:56 2005 UTC vs.
Revision 1.21 by pcg, Sun Dec 2 00:39:06 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 (::conf.keepalive / 2, ::conf.keepalive / 2);
69 }
68 70
69} tcp_si; 71} tcp_si;
70 72
71struct tcp_connection : io_watcher { 73struct tcp_connection : ev::io {
74 int tos;
72 tstamp last_activity; 75 tstamp last_activity;
73 const sockinfo si; 76 const sockinfo si;
74 vpn &v; 77 vpn &v;
75 bool active; // this connection has been actively established 78 bool active; // this connection has been actively established
76 enum { ERROR, IDLE, CONNECTING, CONNECTING_PROXY, ESTABLISHED } state; 79 enum { ERROR, IDLE, CONNECTING, CONNECTING_PROXY, ESTABLISHED } state;
… …
84#if ENABLE_HTTP_PROXY 87#if ENABLE_HTTP_PROXY
85 char *proxy_req; 88 char *proxy_req;
86 int proxy_req_len; 89 int proxy_req_len;
87#endif 90#endif
88 91
89 void tcpv4_ev (io_watcher &w, short revents); 92 void tcpv4_ev (ev::io &w, int revents);
90 93
91 bool send_packet (vpn_packet *pkt, int tos); 94 bool send_packet (vpn_packet *pkt, int tos);
92 bool write_packet (); 95 bool write_packet ();
93 96
94 void error (); // abort conenction && cleanup 97 void error (); // abort conenction && cleanup
… …
100 103
101 tcp_connection (int fd_, const sockinfo &si_, vpn &v_); 104 tcp_connection (int fd_, const sockinfo &si_, vpn &v_);
102 ~tcp_connection (); 105 ~tcp_connection ();
103}; 106};
104 107
105void tcp_si_map::cleaner_cb (time_watcher &w) 108void tcp_si_map::cleaner_cb (ev::timer &w, int revents)
106{ 109{
107 w.start (NOW + 600);
108
109 tstamp to = NOW - ::conf.keepalive - 30 - 60; 110 tstamp to = ev_now () - ::conf.keepalive - 30 - 60;
110 111
111 for (iterator i = begin (); i != end(); ) 112 for (iterator i = begin (); i != end(); )
112 if (i->second->last_activity >= to) 113 if (i->second->last_activity >= to)
113 ++i; 114 ++i;
114 else 115 else
115 { 116 {
117 delete i->second;
116 erase (i); 118 erase (i);
117 i = begin (); 119 i = begin ();
118 } 120 }
119} 121}
120 122
121void 123void
122vpn::tcpv4_ev (io_watcher &w, short revents) 124vpn::tcpv4_ev (ev::io &w, int revents)
123{ 125{
124 if (revents & EVENT_READ) 126 if (revents & EV_READ)
125 { 127 {
126 struct sockaddr_in sa; 128 struct sockaddr_in sa;
127 socklen_t sa_len = sizeof (sa); 129 socklen_t sa_len = sizeof (sa);
128 int len; 130 int len;
129 131
130 int fd = accept (w.fd, (sockaddr *)&sa, &sa_len); 132 int fd = accept (w.fd, (sockaddr *)&sa, &sa_len);
131 133
132 if (fd >= 0) 134 if (fd >= 0)
133 { 135 {
136 fcntl (fd, F_SETFL, O_NONBLOCK);
137 fcntl (fd, F_SETFD, FD_CLOEXEC);
138
134 sockinfo si(sa, PROT_TCPv4); 139 sockinfo si(sa, PROT_TCPv4);
135 140
136 slog (L_DEBUG, _("%s: accepted tcp connection"), (const char *)si);//D 141 slog (L_DEBUG, _("%s: accepted tcp connection"), (const char *)si);//D
137
138 fcntl (fd, F_SETFL, O_NONBLOCK);
139 142
140 tcp_connection *i = new tcp_connection (fd, si, *this); 143 tcp_connection *i = new tcp_connection (fd, si, *this);
141 tcp_si.insert (*i); 144 tcp_si.insert (*i);
142 } 145 }
143 } 146 }
… …
197 return false; 200 return false;
198 } 201 }
199} 202}
200 203
201void 204void
202tcp_connection::tcpv4_ev (io_watcher &w, short revents) 205tcp_connection::tcpv4_ev (ev::io &w, int revents)
203{ 206{
204 last_activity = NOW; 207 last_activity = ev_now ();
205 208
206 if (revents & EVENT_WRITE) 209 if (revents & EV_WRITE)
207 { 210 {
208 if (state == CONNECTING) 211 if (state == CONNECTING)
209 { 212 {
210 state = ESTABLISHED; 213 state = ESTABLISHED;
211 set (EVENT_READ); 214 set (EV_READ);
212#if ENABLE_HTTP_PROXY 215#if ENABLE_HTTP_PROXY
213 if (::conf.proxy_host && ::conf.proxy_port) 216 if (::conf.proxy_host && ::conf.proxy_port)
214 { 217 {
215 state = CONNECTING_PROXY; 218 state = CONNECTING_PROXY;
216 219
… …
230 { 233 {
231 if (write_packet ()) 234 if (write_packet ())
232 { 235 {
233 delete w_pkt; w_pkt = 0; 236 delete w_pkt; w_pkt = 0;
234 237
235 set (EVENT_READ); 238 set (EV_READ);
236 } 239 }
237 } 240 }
238 else 241 else
239 set (EVENT_READ); 242 set (EV_READ);
240 } 243 }
241 else 244 else
242 set (EVENT_READ); 245 set (EV_READ);
243 } 246 }
244 247
245 if (revents & EVENT_READ) 248 if (revents & EV_READ)
246 { 249 {
247 if (state == ESTABLISHED) 250 if (state == ESTABLISHED)
248 for (;;) 251 for (;;)
249 { 252 {
250 if (!r_pkt) 253 if (!r_pkt)
… …
344} 347}
345 348
346bool 349bool
347tcp_connection::send_packet (vpn_packet *pkt, int tos) 350tcp_connection::send_packet (vpn_packet *pkt, int tos)
348{ 351{
349 last_activity = NOW; 352 last_activity = ev_now ();
350 353
351 if (state == IDLE) 354 if (state == IDLE)
352 { 355 {
353 // woaw, the first lost packet ;) 356 // woaw, the first lost packet ;)
354 fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); 357 fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
… …
388 fcntl (fd, F_SETFL, O_NONBLOCK); 391 fcntl (fd, F_SETFL, O_NONBLOCK);
389 392
390 if (connect (fd, csi->sav4 (), csi->salenv4 ()) >= 0 393 if (connect (fd, csi->sav4 (), csi->salenv4 ()) >= 0
391 || errno == EINPROGRESS) 394 || errno == EINPROGRESS)
392 { 395 {
396 fcntl (fd, F_SETFL, O_NONBLOCK);
397 fcntl (fd, F_SETFD, FD_CLOEXEC);
398
393 state = CONNECTING; 399 state = CONNECTING;
394 start (fd, EVENT_WRITE); 400 start (fd, EV_WRITE);
395 } 401 }
396 else 402 else
397 close (fd); 403 close (fd);
398 } 404 }
399 } 405 }
… …
404 if (!w_pkt) 410 if (!w_pkt)
405 { 411 {
406 // how this maps to the underlying tcp packets we don't know 412 // how this maps to the underlying tcp packets we don't know
407 // and we don't care. at least we tried ;) 413 // and we don't care. at least we tried ;)
408#if defined(SOL_IP) && defined(IP_TOS) 414#if defined(SOL_IP) && defined(IP_TOS)
415 if (tos != this->tos)
416 {
417 this->tos = tos;
409 setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); 418 setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
419 }
410#endif 420#endif
411 421
412 w_pkt = pkt; 422 w_pkt = pkt;
413 w_ofs = 0; 423 w_ofs = 0;
414 w_len = pkt->len + 2; // length + size header 424 w_len = pkt->len + 2; // length + size header
… …
418 else 428 else
419 { 429 {
420 w_pkt = new vpn_packet; 430 w_pkt = new vpn_packet;
421 w_pkt->set (*pkt); 431 w_pkt->set (*pkt);
422 432
423 set (EVENT_READ | EVENT_WRITE); 433 set (EV_READ | EV_WRITE);
424 } 434 }
425 } 435 }
426 } 436 }
427 437
428 return state != ERROR; 438 return state != ERROR;
429} 439}
430 440
431void tcp_connection::error () 441void tcp_connection::error ()
432{ 442{
443 stop ();
444
433 if (fd >= 0) 445 if (fd >= 0)
434 { 446 {
435 close (fd); 447 close (fd);
448 tos = -1;
436 fd = -1; 449 fd = -1;
437 } 450 }
438 451
439 delete r_pkt; r_pkt = 0; 452 delete r_pkt; r_pkt = 0;
440 delete w_pkt; w_pkt = 0; 453 delete w_pkt; w_pkt = 0;
441#if ENABLE_HTTP_PROXY 454#if ENABLE_HTTP_PROXY
442 free (proxy_req); proxy_req = 0; 455 free (proxy_req); proxy_req = 0;
443#endif 456#endif
444 457
445 stop ();
446 state = active ? IDLE : ERROR; 458 state = active ? IDLE : ERROR;
447} 459}
448 460
449tcp_connection::tcp_connection (int fd_, const sockinfo &si_, vpn &v_) 461tcp_connection::tcp_connection (int fd_, const sockinfo &si_, vpn &v_)
450: v(v_), si(si_), io_watcher(this, &tcp_connection::tcpv4_ev) 462: v(v_), si(si_), ev::io(this, &tcp_connection::tcpv4_ev)
451{ 463{
452 if (!tcp_si.cleaner.active)
453 tcp_si.cleaner.start (0);
454
455 last_activity = NOW; 464 last_activity = ev_now ();
456 r_pkt = 0; 465 r_pkt = 0;
457 w_pkt = 0; 466 w_pkt = 0;
467 tos = -1;
458 fd = fd_; 468 fd = fd_;
459#if ENABLE_HTTP_PROXY 469#if ENABLE_HTTP_PROXY
460 proxy_req = 0; 470 proxy_req = 0;
461#endif 471#endif
462 472
… …
467 } 477 }
468 else 478 else
469 { 479 {
470 active = false; 480 active = false;
471 state = ESTABLISHED; 481 state = ESTABLISHED;
472 start (fd, EVENT_READ); 482 start (fd, EV_READ);
473 } 483 }
474} 484}
475 485
476tcp_connection::~tcp_connection () 486tcp_connection::~tcp_connection ()
477{ 487{

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