| 1 | /* |
1 | /* |
| 2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
| 3 | Copyright (C) 2003-2005 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 | #include <list> |
34 | #include <list> |
| … | |
… | |
| 793 | { |
803 | { |
| 794 | reset_connection (); |
804 | reset_connection (); |
| 795 | return; |
805 | return; |
| 796 | } |
806 | } |
| 797 | |
807 | |
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808 | last_establish_attempt = ev_now (); |
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809 | |
| 798 | ev::tstamp retry_int = ev::tstamp (retry_cnt & 3 |
810 | ev::tstamp retry_int = ev::tstamp (retry_cnt & 3 |
| 799 | ? (retry_cnt & 3) + 1 |
811 | ? (retry_cnt & 3) + 1 |
| 800 | : 1 << (retry_cnt >> 2)); |
812 | : 1 << (retry_cnt >> 2)); |
| 801 | |
813 | |
| 802 | reset_si (); |
814 | reset_si (); |
| … | |
… | |
| 825 | else |
837 | else |
| 826 | send_ping (dsi, 0); |
838 | send_ping (dsi, 0); |
| 827 | } |
839 | } |
| 828 | } |
840 | } |
| 829 | |
841 | |
| 830 | retry_int *= slow ? 8. : 0.7; |
842 | retry_int *= slow ? 8. : 0.9; |
| 831 | |
843 | |
| 832 | if (retry_int < conf->max_retry) |
844 | if (retry_int < conf->max_retry) |
| 833 | retry_cnt++; |
845 | retry_cnt++; |
| 834 | else |
846 | else |
| 835 | retry_int = conf->max_retry; |
847 | retry_int = conf->max_retry; |
| … | |
… | |
| 905 | if (oseqno > MAX_SEQNO) |
917 | if (oseqno > MAX_SEQNO) |
| 906 | rekey (); |
918 | rekey (); |
| 907 | } |
919 | } |
| 908 | |
920 | |
| 909 | void |
921 | void |
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922 | connection::post_inject_queue () |
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923 | { |
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924 | // force a connection every now and when when packets are sent (max 1/s) |
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925 | if (ev_now () - last_establish_attempt >= 0.95) // arbitrary |
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926 | establish_connection.stop (); |
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927 | |
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928 | establish_connection (); |
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929 | } |
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930 | |
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931 | void |
| 910 | connection::inject_data_packet (tap_packet *pkt, bool broadcast/*TODO DDD*/) |
932 | connection::inject_data_packet (tap_packet *pkt) |
| 911 | { |
933 | { |
| 912 | if (ictx && octx) |
934 | if (ictx && octx) |
| 913 | send_data_packet (pkt); |
935 | send_data_packet (pkt); |
| 914 | else |
936 | else |
| 915 | { |
937 | { |
| 916 | if (!broadcast) |
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| 917 | data_queue.put (new tap_packet (*pkt)); |
938 | data_queue.put (new tap_packet (*pkt)); |
| 918 | |
939 | post_inject_queue (); |
| 919 | establish_connection (); |
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| 920 | } |
940 | } |
| 921 | } |
941 | } |
| 922 | |
942 | |
| 923 | void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
943 | void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
| 924 | { |
944 | { |
| 925 | if (ictx && octx) |
945 | if (ictx && octx) |
| 926 | send_vpn_packet (pkt, si, tos); |
946 | send_vpn_packet (pkt, si, tos); |
| 927 | else |
947 | else |
| 928 | { |
948 | { |
| 929 | vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); |
949 | vpn_queue.put ((vpn_packet *)new data_packet (*(data_packet *)pkt)); |
| 930 | |
950 | post_inject_queue (); |
| 931 | establish_connection (); |
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| 932 | } |
951 | } |
| 933 | } |
952 | } |
| 934 | |
953 | |
| 935 | void |
954 | void |
| 936 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
955 | connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
| … | |
… | |
| 1315 | { |
1334 | { |
| 1316 | rekey .set<connection, &connection::rekey_cb > (this); |
1335 | rekey .set<connection, &connection::rekey_cb > (this); |
| 1317 | keepalive .set<connection, &connection::keepalive_cb > (this); |
1336 | keepalive .set<connection, &connection::keepalive_cb > (this); |
| 1318 | establish_connection.set<connection, &connection::establish_connection_cb> (this); |
1337 | establish_connection.set<connection, &connection::establish_connection_cb> (this); |
| 1319 | |
1338 | |
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1339 | last_establish_attempt = 0.; |
| 1320 | octx = ictx = 0; |
1340 | octx = ictx = 0; |
| 1321 | retry_cnt = 0; |
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| 1322 | |
1341 | |
| 1323 | if (!conf->protocols) // make sure some protocol is enabled |
1342 | if (!conf->protocols) // make sure some protocol is enabled |
| 1324 | conf->protocols = PROT_UDPv4; |
1343 | conf->protocols = PROT_UDPv4; |
| 1325 | |
1344 | |
| 1326 | connectmode = conf->connectmode; |
1345 | connectmode = conf->connectmode; |
| 1327 | |
1346 | |
| 1328 | // queue a dummy packet to force an initial connection attempt |
1347 | // queue a dummy packet to force an initial connection attempt |
| 1329 | if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED) |
1348 | if (connectmode != conf_node::C_ALWAYS && connectmode != conf_node::C_DISABLED) |
| 1330 | { |
1349 | vpn_queue.put (new net_packet); |
| 1331 | net_packet *p = new net_packet; |
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| 1332 | p->len = 0; |
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| 1333 | vpn_queue.put (p); |
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| 1334 | } |
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| 1335 | |
1350 | |
| 1336 | reset_connection (); |
1351 | reset_connection (); |
| 1337 | } |
1352 | } |
| 1338 | |
1353 | |
| 1339 | connection::~connection () |
1354 | connection::~connection () |
