diff options
Diffstat (limited to 'proto.c')
| -rw-r--r-- | proto.c | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/proto.c b/proto.c deleted file mode 100644 index 65a6b67..0000000 --- a/proto.c +++ /dev/null @@ -1,122 +0,0 @@ -/* - * OpenVPN -- An application to securely tunnel IP networks - * over a single TCP/UDP port, with support for SSL/TLS-based - * session authentication and key exchange, - * packet encryption, packet authentication, and - * packet compression. - * - * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program (see the file COPYING included with this - * distribution); if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include "syshead.h" - -#include "proto.h" -#include "error.h" - -#include "memdbg.h" - -/* - * If raw tunnel packet is IPv4, return true and increment - * buffer offset to start of IP header. - */ -bool -is_ipv4 (int tunnel_type, struct buffer *buf) -{ - int offset; - const struct openvpn_iphdr *ih; - - verify_align_4 (buf); - if (tunnel_type == DEV_TYPE_TUN) - { - if (BLEN (buf) < (int) sizeof (struct openvpn_iphdr)) - return false; - offset = 0; - } - else if (tunnel_type == DEV_TYPE_TAP) - { - const struct openvpn_ethhdr *eh; - if (BLEN (buf) < (int)(sizeof (struct openvpn_ethhdr) - + sizeof (struct openvpn_iphdr))) - return false; - eh = (const struct openvpn_ethhdr *) BPTR (buf); - if (ntohs (eh->proto) != OPENVPN_ETH_P_IPV4) - return false; - offset = sizeof (struct openvpn_ethhdr); - } - else - return false; - - ih = (const struct openvpn_iphdr *) (BPTR (buf) + offset); - - if (OPENVPN_IPH_GET_VER (ih->version_len) == 4) - return buf_advance (buf, offset); - else - return false; -} - -#ifdef PACKET_TRUNCATION_CHECK - -void -ipv4_packet_size_verify (const uint8_t *data, - const int size, - const int tunnel_type, - const char *prefix, - counter_type *errors) -{ - if (size > 0) - { - struct buffer buf; - - buf_set_read (&buf, data, size); - - if (is_ipv4 (tunnel_type, &buf)) - { - const struct openvpn_iphdr *pip; - int hlen; - int totlen; - const char *msgstr = "PACKET SIZE INFO"; - unsigned int msglevel = D_PACKET_TRUNC_DEBUG; - - if (BLEN (&buf) < (int) sizeof (struct openvpn_iphdr)) - return; - - verify_align_4 (&buf); - pip = (struct openvpn_iphdr *) BPTR (&buf); - - hlen = OPENVPN_IPH_GET_LEN (pip->version_len); - totlen = ntohs (pip->tot_len); - - if (BLEN (&buf) != totlen) - { - msgstr = "PACKET TRUNCATION ERROR"; - msglevel = D_PACKET_TRUNC_ERR; - if (errors) - ++(*errors); - } - - msg (msglevel, "%s %s: size=%d totlen=%d hlen=%d errcount=" counter_format, - msgstr, - prefix, - BLEN (&buf), - totlen, - hlen, - errors ? *errors : (counter_type)0); - } - } -} - -#endif |