1 | /* |
1 | /* |
2 | connection.C -- manage a single connection |
2 | connection.C -- manage a single connection |
3 | Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> |
3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
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5 | This file is part of GVPE. |
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6 | |
5 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
6 | 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 |
7 | the Free Software Foundation; either version 2 of the License, or |
9 | the Free Software Foundation; either version 2 of the License, or |
8 | (at your option) any later version. |
10 | (at your option) any later version. |
9 | |
11 | |
10 | 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, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
14 | |
16 | |
15 | 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 |
16 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ |
20 | */ |
19 | |
21 | |
20 | #include "config.h" |
22 | #include "config.h" |
21 | |
23 | |
… | |
… | |
627 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
629 | protocol = best_protocol (THISNODE->protocols & conf->protocols); |
628 | |
630 | |
629 | // mask out protocols we cannot establish |
631 | // mask out protocols we cannot establish |
630 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
632 | if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
631 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
633 | if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
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634 | if (!conf->dns_port) protocol &= ~PROT_DNSv4; |
632 | |
635 | |
633 | si.set (conf, protocol); |
636 | si.set (conf, protocol); |
634 | } |
637 | } |
635 | |
638 | |
636 | // ensure sockinfo is valid, forward if necessary |
639 | // ensure sockinfo is valid, forward if necessary |
… | |
… | |
656 | } |
659 | } |
657 | |
660 | |
658 | void |
661 | void |
659 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
662 | connection::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
660 | { |
663 | { |
661 | if (!vpn->send_vpn_packet (pkt, si, tos)) |
664 | bool ok; |
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665 | |
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666 | switch (si.prot) |
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667 | { |
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668 | case PROT_IPv4: |
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669 | ok = vpn->send_ipv4_packet (pkt, si, tos); break; |
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670 | case PROT_UDPv4: |
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671 | ok = vpn->send_udpv4_packet (pkt, si, tos); break; |
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672 | #if ENABLE_TCP |
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673 | case PROT_TCPv4: |
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674 | ok = vpn->send_tcpv4_packet (pkt, si, tos); break; |
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675 | #endif |
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676 | #if ENABLE_ICMP |
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677 | case PROT_ICMPv4: |
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678 | ok = vpn->send_icmpv4_packet (pkt, si, tos); break; |
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679 | #endif |
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680 | #if ENABLE_DNS |
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681 | case PROT_DNSv4: |
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682 | ok = send_dnsv4_packet (pkt, si, tos); break; |
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683 | #endif |
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684 | |
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685 | default: |
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686 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
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687 | ok = false; |
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688 | } |
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689 | |
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690 | if (!ok) |
662 | reset_connection (); |
691 | reset_connection (); |
663 | } |
692 | } |
664 | |
693 | |
665 | void |
694 | void |
666 | connection::send_ping (const sockinfo &si, u8 pong) |
695 | connection::send_ping (const sockinfo &si, u8 pong) |
… | |
… | |
744 | && connectmode != conf_node::C_DISABLED |
773 | && connectmode != conf_node::C_DISABLED |
745 | && NOW > w.at) |
774 | && NOW > w.at) |
746 | { |
775 | { |
747 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
776 | double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
748 | |
777 | |
749 | if (retry_int < 3600 * 8) |
778 | if (retry_int < conf->max_retry) |
750 | retry_cnt++; |
779 | retry_cnt++; |
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780 | else |
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781 | retry_int = conf->max_retry; |
751 | |
782 | |
752 | w.start (NOW + retry_int); |
783 | w.start (NOW + retry_int); |
753 | |
784 | |
754 | reset_si (); |
785 | reset_si (); |
755 | |
786 | |
… | |
… | |
783 | } |
814 | } |
784 | |
815 | |
785 | delete ictx; ictx = 0; |
816 | delete ictx; ictx = 0; |
786 | delete octx; octx = 0; |
817 | delete octx; octx = 0; |
787 | |
818 | |
788 | si.host= 0; |
819 | si.host = 0; |
789 | |
820 | |
790 | last_activity = 0; |
821 | last_activity = 0; |
791 | retry_cnt = 0; |
822 | retry_cnt = 0; |
792 | |
823 | |
793 | rekey.stop (); |
824 | rekey.stop (); |
… | |
… | |
1096 | break; |
1127 | break; |
1097 | |
1128 | |
1098 | case vpn_packet::PT_CONNECT_INFO: |
1129 | case vpn_packet::PT_CONNECT_INFO: |
1099 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1130 | if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1100 | { |
1131 | { |
1101 | connect_info_packet *p = (connect_info_packet *) pkt; |
1132 | connect_info_packet *p = (connect_info_packet *)pkt; |
1102 | |
1133 | |
1103 | assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1134 | if (p->id > 0 && p->id <= vpn->conns.size ()) // hmac-auth does not mean we accept anything |
1104 | |
1135 | { |
1105 | connection *c = vpn->conns[p->id - 1]; |
1136 | connection *c = vpn->conns[p->id - 1]; |
1106 | |
1137 | |
1107 | c->conf->protocols = p->protocols; |
1138 | c->conf->protocols = p->protocols; |
1108 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1139 | protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1109 | p->si.upgrade_protocol (protocol, c->conf); |
1140 | p->si.upgrade_protocol (protocol, c->conf); |
1110 | |
1141 | |
1111 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1142 | slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1112 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1143 | conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1113 | |
1144 | |
1114 | const sockinfo &dsi = forward_si (p->si); |
1145 | const sockinfo &dsi = forward_si (p->si); |
1115 | |
1146 | |
1116 | if (dsi.valid ()) |
1147 | if (dsi.valid ()) |
1117 | c->send_auth_request (dsi, true); |
1148 | c->send_auth_request (dsi, true); |
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1149 | } |
1118 | } |
1150 | } |
1119 | |
1151 | |
1120 | break; |
1152 | break; |
1121 | |
1153 | |
1122 | default: |
1154 | default: |
… | |
… | |
1186 | putenv ("STATE=down"); |
1218 | putenv ("STATE=down"); |
1187 | |
1219 | |
1188 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1220 | return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1189 | } |
1221 | } |
1190 | |
1222 | |
1191 | connection::connection(struct vpn *vpn_) |
1223 | connection::connection (struct vpn *vpn, conf_node *conf) |
1192 | : vpn(vpn_) |
1224 | : vpn(vpn), conf(conf) |
1193 | , rekey (this, &connection::rekey_cb) |
1225 | , rekey (this, &connection::rekey_cb) |
1194 | , keepalive (this, &connection::keepalive_cb) |
1226 | , keepalive (this, &connection::keepalive_cb) |
1195 | , establish_connection (this, &connection::establish_connection_cb) |
1227 | , establish_connection (this, &connection::establish_connection_cb) |
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1228 | #if ENABLE_DNS |
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1229 | , dnsv4_tw (this, &connection::dnsv4_cb) |
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1230 | , dns_rcvdq (0), dns_snddq (0) |
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1231 | , dns_rcvseq (0), dns_sndseq (0) |
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1232 | #endif |
1196 | { |
1233 | { |
1197 | octx = ictx = 0; |
1234 | octx = ictx = 0; |
1198 | retry_cnt = 0; |
1235 | retry_cnt = 0; |
1199 | |
1236 | |
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1237 | if (!conf->protocols) // make sure some protocol is enabled |
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1238 | conf->protocols = PROT_UDPv4; |
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1239 | |
1200 | connectmode = conf_node::C_ALWAYS; // initial setting |
1240 | connectmode = conf_node::C_ALWAYS; // initial setting |
1201 | reset_connection (); |
1241 | reset_connection (); |
1202 | } |
1242 | } |
1203 | |
1243 | |
1204 | connection::~connection () |
1244 | connection::~connection () |