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) 2003-2007 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2003-2008 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 it |
8 | it under the terms of the GNU General Public License as published by |
8 | under the terms of the GNU General Public License as published by the |
9 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
10 | (at your option) any later version. |
10 | option) any later version. |
11 | |
11 | |
12 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, but |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
15 | GNU General Public License for more details. |
15 | 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 along |
18 | along with gvpe; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | |
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20 | Additional permission under GNU GPL version 3 section 7 |
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21 | |
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22 | If you modify this Program, or any covered work, by linking or |
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23 | combining it with the OpenSSL project's OpenSSL library (or a modified |
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24 | version of that library), containing parts covered by the terms of the |
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25 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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26 | additional permission to convey the resulting work. Corresponding |
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27 | Source for a non-source form of such a combination shall include the |
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28 | source code for the parts of OpenSSL used as well as that of the |
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29 | covered work. |
20 | */ |
30 | */ |
21 | |
31 | |
22 | #include "config.h" |
32 | #include "config.h" |
23 | |
33 | |
24 | #if ENABLE_TCP |
34 | #if ENABLE_TCP |
… | |
… | |
57 | { |
67 | { |
58 | return *a < *b; |
68 | return *a < *b; |
59 | } |
69 | } |
60 | }; |
70 | }; |
61 | |
71 | |
62 | struct tcp_si_map : public map<const sockinfo *, tcp_connection *, lt_sockinfo> { |
72 | struct tcp_si_map : public map<const sockinfo *, tcp_connection *, lt_sockinfo> |
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73 | { |
63 | void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner; |
74 | inline void cleaner_cb (ev::timer &w, int revents); ev::timer cleaner; |
64 | |
75 | |
65 | tcp_si_map () |
76 | tcp_si_map () |
66 | : cleaner(this, &tcp_si_map::cleaner_cb) |
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67 | { |
77 | { |
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78 | ev_default_loop (0); |
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79 | cleaner.set<tcp_si_map, &tcp_si_map::cleaner_cb> (this); |
68 | cleaner.start (::conf.keepalive / 2, ::conf.keepalive / 2); |
80 | cleaner.start (::conf.keepalive / 2, ::conf.keepalive / 2); |
69 | } |
81 | } |
70 | |
82 | |
71 | } tcp_si; |
83 | } tcp_si; |
72 | |
84 | |
73 | struct tcp_connection : ev::io { |
85 | struct tcp_connection : ev::io |
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86 | { |
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87 | int tos; |
74 | tstamp last_activity; |
88 | tstamp last_activity; |
75 | const sockinfo si; |
89 | const sockinfo si; |
76 | vpn &v; |
90 | vpn &v; |
77 | bool active; // this connection has been actively established |
91 | bool active; // this connection has been actively established |
78 | enum { ERROR, IDLE, CONNECTING, CONNECTING_PROXY, ESTABLISHED } state; |
92 | enum { ERROR, IDLE, CONNECTING, CONNECTING_PROXY, ESTABLISHED } state; |
… | |
… | |
86 | #if ENABLE_HTTP_PROXY |
100 | #if ENABLE_HTTP_PROXY |
87 | char *proxy_req; |
101 | char *proxy_req; |
88 | int proxy_req_len; |
102 | int proxy_req_len; |
89 | #endif |
103 | #endif |
90 | |
104 | |
91 | void tcpv4_ev (ev::io &w, int revents); |
105 | inline void tcpv4_ev (ev::io &w, int revents); |
92 | |
106 | |
93 | bool send_packet (vpn_packet *pkt, int tos); |
107 | bool send_packet (vpn_packet *pkt, int tos); |
94 | bool write_packet (); |
108 | bool write_packet (); |
95 | |
109 | |
96 | void error (); // abort conenction && cleanup |
110 | void error (); // abort conenction && cleanup |
… | |
… | |
409 | if (!w_pkt) |
423 | if (!w_pkt) |
410 | { |
424 | { |
411 | // how this maps to the underlying tcp packets we don't know |
425 | // how this maps to the underlying tcp packets we don't know |
412 | // and we don't care. at least we tried ;) |
426 | // and we don't care. at least we tried ;) |
413 | #if defined(SOL_IP) && defined(IP_TOS) |
427 | #if defined(SOL_IP) && defined(IP_TOS) |
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428 | if (tos != this->tos) |
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429 | { |
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430 | this->tos = tos; |
414 | setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
431 | setsockopt (fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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432 | } |
415 | #endif |
433 | #endif |
416 | |
434 | |
417 | w_pkt = pkt; |
435 | w_pkt = pkt; |
418 | w_ofs = 0; |
436 | w_ofs = 0; |
419 | w_len = pkt->len + 2; // length + size header |
437 | w_len = pkt->len + 2; // length + size header |
… | |
… | |
438 | stop (); |
456 | stop (); |
439 | |
457 | |
440 | if (fd >= 0) |
458 | if (fd >= 0) |
441 | { |
459 | { |
442 | close (fd); |
460 | close (fd); |
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461 | tos = -1; |
443 | fd = -1; |
462 | fd = -1; |
444 | } |
463 | } |
445 | |
464 | |
446 | delete r_pkt; r_pkt = 0; |
465 | delete r_pkt; r_pkt = 0; |
447 | delete w_pkt; w_pkt = 0; |
466 | delete w_pkt; w_pkt = 0; |
448 | #if ENABLE_HTTP_PROXY |
467 | #if ENABLE_HTTP_PROXY |
… | |
… | |
451 | |
470 | |
452 | state = active ? IDLE : ERROR; |
471 | state = active ? IDLE : ERROR; |
453 | } |
472 | } |
454 | |
473 | |
455 | tcp_connection::tcp_connection (int fd_, const sockinfo &si_, vpn &v_) |
474 | tcp_connection::tcp_connection (int fd_, const sockinfo &si_, vpn &v_) |
456 | : v(v_), si(si_), ev::io(this, &tcp_connection::tcpv4_ev) |
475 | : v(v_), si(si_) |
457 | { |
476 | { |
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477 | set<tcp_connection, &tcp_connection::tcpv4_ev> (this); |
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478 | |
458 | last_activity = ev_now (); |
479 | last_activity = ev_now (); |
459 | r_pkt = 0; |
480 | r_pkt = 0; |
460 | w_pkt = 0; |
481 | w_pkt = 0; |
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482 | tos = -1; |
461 | fd = fd_; |
483 | fd = fd_; |
462 | #if ENABLE_HTTP_PROXY |
484 | #if ENABLE_HTTP_PROXY |
463 | proxy_req = 0; |
485 | proxy_req = 0; |
464 | #endif |
486 | #endif |
465 | |
487 | |