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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 1.24 by pcg, Thu Dec 6 00:35:29 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>
… …
57 { 57 {
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{
64 inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner;
64 65
65 tcp_si_map () 66 tcp_si_map ()
66 : cleaner(this, &tcp_si_map::cleaner_cb)
67 { 67 {
68 cleaner.start (0); 68 cleaner.set<tcp_si_map, &tcp_si_map::cleaner_cb> (this);
69 cleaner.start (::conf.keepalive / 2, ::conf.keepalive / 2);
69 } 70 }
71
70} tcp_si; 72} tcp_si;
71 73
72struct tcp_connection : io_watcher { 74struct tcp_connection : ev::io
75{
76 int tos;
73 tstamp last_activity; 77 tstamp last_activity;
74 const sockinfo si; 78 const sockinfo si;
75 vpn &v; 79 vpn &v;
76 bool active; // this connection has been actively established 80 bool active; // this connection has been actively established
77 enum { ERROR, IDLE, CONNECTING, CONNECTING_PROXY, ESTABLISHED } state; 81 enum { ERROR, IDLE, CONNECTING, CONNECTING_PROXY, ESTABLISHED } state;
… …
85#if ENABLE_HTTP_PROXY 89#if ENABLE_HTTP_PROXY
86 char *proxy_req; 90 char *proxy_req;
87 int proxy_req_len; 91 int proxy_req_len;
88#endif 92#endif
89 93
90 void tcpv4_ev (io_watcher &w, short revents); 94 inline void tcpv4_ev (ev::io &w, int revents);
91 95
92 bool send_packet (vpn_packet *pkt, int tos); 96 bool send_packet (vpn_packet *pkt, int tos);
93 bool write_packet (); 97 bool write_packet ();
94 98
95 void error (); // abort conenction && cleanup 99 void error (); // abort conenction && cleanup
96 100
97 operator tcp_si_map::value_type() 101 operator tcp_si_map::value_type()
98 { 102 {
99 return tcp_si_map::value_type (&si, this); 103 return tcp_si_map::value_type (&si, this);
100 } 104 }
101 105
102 tcp_connection (int fd_, const sockinfo &si_, vpn &v_); 106 tcp_connection (int fd_, const sockinfo &si_, vpn &v_);
103 ~tcp_connection (); 107 ~tcp_connection ();
104}; 108};
105 109
106void tcp_si_map::cleaner_cb (time_watcher &w) 110void tcp_si_map::cleaner_cb (ev::timer &w, int revents)
107{ 111{
108 w.start (NOW + 600);
109
110 tstamp to = NOW - ::conf.keepalive - 30 - 60; 112 tstamp to = ev_now () - ::conf.keepalive - 30 - 60;
111 113
112 for (iterator i = begin (); i != end(); ) 114 for (iterator i = begin (); i != end(); )
113 if (i->second->last_activity >= to) 115 if (i->second->last_activity >= to)
114 ++i; 116 ++i;
115 else 117 else
116 { 118 {
119 delete i->second;
117 erase (i); 120 erase (i);
118 i = begin (); 121 i = begin ();
119 } 122 }
120} 123}
121 124
122void 125void
123vpn::tcpv4_ev (io_watcher &w, short revents) 126vpn::tcpv4_ev (ev::io &w, int revents)
124{ 127{
125 if (revents & EVENT_READ) 128 if (revents & EV_READ)
126 { 129 {
127 struct sockaddr_in sa; 130 struct sockaddr_in sa;
128 socklen_t sa_len = sizeof (sa); 131 socklen_t sa_len = sizeof (sa);
129 int len; 132 int len;
130 133
131 int fd = accept (w.fd, (sockaddr *)&sa, &sa_len); 134 int fd = accept (w.fd, (sockaddr *)&sa, &sa_len);
132 135
133 if (fd >= 0) 136 if (fd >= 0)
134 { 137 {
138 fcntl (fd, F_SETFL, O_NONBLOCK);
139 fcntl (fd, F_SETFD, FD_CLOEXEC);
140
135 sockinfo si(sa, PROT_TCPv4); 141 sockinfo si(sa, PROT_TCPv4);
136 142
137 slog (L_DEBUG, _("%s: accepted tcp connection"), (const char *)si);//D 143 slog (L_DEBUG, _("%s: accepted tcp connection"), (const char *)si);//D
138
139 fcntl (fd, F_SETFL, O_NONBLOCK);
140 144
141 tcp_connection *i = new tcp_connection (fd, si, *this); 145 tcp_connection *i = new tcp_connection (fd, si, *this);
142 tcp_si.insert (*i); 146 tcp_si.insert (*i);
143 } 147 }
144 } 148 }
… …
198 return false; 202 return false;
199 } 203 }
200} 204}
201 205
202void 206void
203tcp_connection::tcpv4_ev (io_watcher &w, short revents) 207tcp_connection::tcpv4_ev (ev::io &w, int revents)
204{ 208{
205 last_activity = NOW; 209 last_activity = ev_now ();
206 210
207 if (revents & EVENT_WRITE) 211 if (revents & EV_WRITE)
208 { 212 {
209 if (state == CONNECTING) 213 if (state == CONNECTING)
210 { 214 {
211 state = ESTABLISHED; 215 state = ESTABLISHED;
212 set (EVENT_READ); 216 set (EV_READ);
213#if ENABLE_HTTP_PROXY 217#if ENABLE_HTTP_PROXY
214 if (::conf.proxy_host && ::conf.proxy_port) 218 if (::conf.proxy_host && ::conf.proxy_port)
215 { 219 {
216 state = CONNECTING_PROXY; 220 state = CONNECTING_PROXY;
217 221
… …
231 { 235 {
232 if (write_packet ()) 236 if (write_packet ())
233 { 237 {
234 delete w_pkt; w_pkt = 0; 238 delete w_pkt; w_pkt = 0;
235 239
236 set (EVENT_READ); 240 set (EV_READ);
237 } 241 }
238 } 242 }
239 else 243 else
240 set (EVENT_READ); 244 set (EV_READ);
241 } 245 }
242 else 246 else
243 set (EVENT_READ); 247 set (EV_READ);
244 } 248 }
245 249
246 if (revents & EVENT_READ) 250 if (revents & EV_READ)
247 { 251 {
248 if (state == ESTABLISHED) 252 if (state == ESTABLISHED)
249 for (;;) 253 for (;;)
250 { 254 {
251 if (!r_pkt) 255 if (!r_pkt)
… …
345} 349}
346 350
347bool 351bool
348tcp_connection::send_packet (vpn_packet *pkt, int tos) 352tcp_connection::send_packet (vpn_packet *pkt, int tos)
349{ 353{
350 last_activity = NOW; 354 last_activity = ev_now ();
351 355
352 if (state == IDLE) 356 if (state == IDLE)
353 { 357 {
354 // woaw, the first lost packet ;) 358 // woaw, the first lost packet ;)
355 fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); 359 fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
… …
389 fcntl (fd, F_SETFL, O_NONBLOCK); 393 fcntl (fd, F_SETFL, O_NONBLOCK);
390 394
391 if (connect (fd, csi->sav4 (), csi->salenv4 ()) >= 0 395 if (connect (fd, csi->sav4 (), csi->salenv4 ()) >= 0
392 || errno == EINPROGRESS) 396 || errno == EINPROGRESS)
393 { 397 {
398 fcntl (fd, F_SETFL, O_NONBLOCK);
399 fcntl (fd, F_SETFD, FD_CLOEXEC);
400
394 state = CONNECTING; 401 state = CONNECTING;
395 start (fd, EVENT_WRITE); 402 start (fd, EV_WRITE);
396 } 403 }
397 else 404 else
398 close (fd); 405 close (fd);
399 } 406 }
400 } 407 }
… …
405 if (!w_pkt) 412 if (!w_pkt)
406 { 413 {
407 // how this maps to the underlying tcp packets we don't know 414 // how this maps to the underlying tcp packets we don't know
408 // and we don't care. at least we tried ;) 415 // and we don't care. at least we tried ;)
409#if defined(SOL_IP) && defined(IP_TOS) 416#if defined(SOL_IP) && defined(IP_TOS)
417 if (tos != this->tos)
418 {
419 this->tos = tos;
410 setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); 420 setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos);
421 }
411#endif 422#endif
412 423
413 w_pkt = pkt; 424 w_pkt = pkt;
414 w_ofs = 0; 425 w_ofs = 0;
415 w_len = pkt->len + 2; // length + size header 426 w_len = pkt->len + 2; // length + size header
… …
419 else 430 else
420 { 431 {
421 w_pkt = new vpn_packet; 432 w_pkt = new vpn_packet;
422 w_pkt->set (*pkt); 433 w_pkt->set (*pkt);
423 434
424 set (EVENT_READ | EVENT_WRITE); 435 set (EV_READ | EV_WRITE);
425 } 436 }
426 } 437 }
427 } 438 }
428 439
429 return state != ERROR; 440 return state != ERROR;
430} 441}
431 442
432void tcp_connection::error () 443void tcp_connection::error ()
433{ 444{
445 stop ();
446
434 if (fd >= 0) 447 if (fd >= 0)
435 { 448 {
436 close (fd); 449 close (fd);
450 tos = -1;
437 fd = -1; 451 fd = -1;
438 } 452 }
439 453
440 delete r_pkt; r_pkt = 0; 454 delete r_pkt; r_pkt = 0;
441 delete w_pkt; w_pkt = 0; 455 delete w_pkt; w_pkt = 0;
442#if ENABLE_HTTP_PROXY 456#if ENABLE_HTTP_PROXY
443 free (proxy_req); proxy_req = 0; 457 free (proxy_req); proxy_req = 0;
444#endif 458#endif
445 459
446 stop ();
447 state = active ? IDLE : ERROR; 460 state = active ? IDLE : ERROR;
448} 461}
449 462
450tcp_connection::tcp_connection (int fd_, const sockinfo &si_, vpn &v_) 463tcp_connection::tcp_connection (int fd_, const sockinfo &si_, vpn &v_)
451: v(v_), si(si_), io_watcher(this, &tcp_connection::tcpv4_ev) 464: v(v_), si(si_)
452{ 465{
466 set<tcp_connection, &tcp_connection::tcpv4_ev> (this);
467
453 last_activity = NOW; 468 last_activity = ev_now ();
454 r_pkt = 0; 469 r_pkt = 0;
455 w_pkt = 0; 470 w_pkt = 0;
471 tos = -1;
456 fd = fd_; 472 fd = fd_;
457#if ENABLE_HTTP_PROXY 473#if ENABLE_HTTP_PROXY
458 proxy_req = 0; 474 proxy_req = 0;
459#endif 475#endif
460 476
… …
465 } 481 }
466 else 482 else
467 { 483 {
468 active = false; 484 active = false;
469 state = ESTABLISHED; 485 state = ESTABLISHED;
470 start (fd, EVENT_READ); 486 start (fd, EV_READ);
471 } 487 }
472} 488}
473 489
474tcp_connection::~tcp_connection () 490tcp_connection::~tcp_connection ()
475{ 491{

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