| 1 | /* |
1 | /* |
| 2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
2 | vpn.C -- handle the protocol, encryption, handshaking etc. |
| 3 | Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2003-2008,2010,2011 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 it |
7 | GVPE is free software; you can redistribute it and/or modify it |
| 8 | under the terms of the GNU General Public License as published by the |
8 | under the terms of the GNU General Public License as published by the |
| … | |
… | |
| 484 | if (src == 0 || src > conns.size () |
484 | if (src == 0 || src > conns.size () |
| 485 | || dst > conns.size () |
485 | || dst > conns.size () |
| 486 | || pkt->typ () >= vpn_packet::PT_MAX) |
486 | || pkt->typ () >= vpn_packet::PT_MAX) |
| 487 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
487 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
| 488 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
488 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
| 489 | else if (dst > conns.size ()) |
|
|
| 490 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
|
|
| 491 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
|
|
| 492 | else |
489 | else |
| 493 | { |
490 | { |
| 494 | connection *c = conns[src - 1]; |
491 | connection *c = conns[src - 1]; |
| 495 | |
492 | |
| 496 | if (dst == 0) |
493 | if (dst == 0) |
| … | |
… | |
| 521 | return send_ipv4_packet (pkt, si, tos); |
518 | return send_ipv4_packet (pkt, si, tos); |
| 522 | |
519 | |
| 523 | case PROT_UDPv4: |
520 | case PROT_UDPv4: |
| 524 | return send_udpv4_packet (pkt, si, tos); |
521 | return send_udpv4_packet (pkt, si, tos); |
| 525 | |
522 | |
| 526 | #if ENABLE_TCP |
523 | #if ENABLE_TCP |
| 527 | case PROT_TCPv4: |
524 | case PROT_TCPv4: |
| 528 | return send_tcpv4_packet (pkt, si, tos); |
525 | return send_tcpv4_packet (pkt, si, tos); |
| 529 | #endif |
526 | #endif |
| 530 | #if ENABLE_ICMP |
527 | #if ENABLE_ICMP |
| 531 | case PROT_ICMPv4: |
528 | case PROT_ICMPv4: |
| … | |
… | |
| 559 | if (len > 0) |
556 | if (len > 0) |
| 560 | { |
557 | { |
| 561 | pkt->len = len; |
558 | pkt->len = len; |
| 562 | |
559 | |
| 563 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
560 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
| 564 | pkt->skip_hdr (IP_OVERHEAD); |
561 | pkt->skip_hdr (pkt->ipv4_hdr_len ()); |
| 565 | |
562 | |
| 566 | recv_vpn_packet (pkt, si); |
563 | recv_vpn_packet (pkt, si); |
| 567 | } |
564 | } |
| 568 | else |
565 | else |
| 569 | { |
566 | { |
| … | |
… | |
| 606 | if (hdr->type == ::conf.icmp_type |
603 | if (hdr->type == ::conf.icmp_type |
| 607 | && hdr->code == 255) |
604 | && hdr->code == 255) |
| 608 | { |
605 | { |
| 609 | // raw sockets deliver the ipv4, but don't expect it on sends |
606 | // raw sockets deliver the ipv4, but don't expect it on sends |
| 610 | // this is slow, but... |
607 | // this is slow, but... |
| 611 | pkt->skip_hdr (ICMP_OVERHEAD); |
608 | pkt->skip_hdr (pkt->ipv4_hdr_len () + (ICMP_OVERHEAD - IP_OVERHEAD)); |
| 612 | |
609 | |
| 613 | recv_vpn_packet (pkt, si); |
610 | recv_vpn_packet (pkt, si); |
| 614 | } |
611 | } |
| 615 | } |
612 | } |
| 616 | else |
613 | else |
