diff options
Diffstat (limited to 'proto.h')
| -rw-r--r-- | proto.h | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/proto.h b/proto.h deleted file mode 100644 index 55f0832..0000000 --- a/proto.h +++ /dev/null @@ -1,202 +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 - */ - -#ifndef PROTO_H -#define PROTO_H - -#include "common.h" -#include "buffer.h" - -#pragma pack(1) - -/* - * Tunnel types - */ -#define DEV_TYPE_UNDEF 0 -#define DEV_TYPE_NULL 1 -#define DEV_TYPE_TUN 2 /* point-to-point IP tunnel */ -#define DEV_TYPE_TAP 3 /* ethernet (802.3) tunnel */ - -/* TUN topologies */ - -#define TOP_UNDEF 0 -#define TOP_NET30 1 -#define TOP_P2P 2 -#define TOP_SUBNET 3 - -/* - * IP and Ethernet protocol structs. For portability, - * OpenVPN needs its own definitions of these structs, and - * names have been adjusted to avoid collisions with - * native structs. - */ - -#define OPENVPN_ETH_ALEN 6 /* ethernet address length */ -struct openvpn_ethhdr -{ - uint8_t dest[OPENVPN_ETH_ALEN]; /* destination ethernet addr */ - uint8_t source[OPENVPN_ETH_ALEN]; /* source ethernet addr */ - -# define OPENVPN_ETH_P_IPV4 0x0800 /* IPv4 protocol */ -# define OPENVPN_ETH_P_IPV6 0x86DD /* IPv6 protocol */ -# define OPENVPN_ETH_P_ARP 0x0806 /* ARP protocol */ - uint16_t proto; /* packet type ID field */ -}; - -struct openvpn_arp { -# define ARP_MAC_ADDR_TYPE 0x0001 - uint16_t mac_addr_type; /* 0x0001 */ - - uint16_t proto_addr_type; /* 0x0800 */ - uint8_t mac_addr_size; /* 0x06 */ - uint8_t proto_addr_size; /* 0x04 */ - -# define ARP_REQUEST 0x0001 -# define ARP_REPLY 0x0002 - uint16_t arp_command; /* 0x0001 for ARP request, 0x0002 for ARP reply */ - - uint8_t mac_src[OPENVPN_ETH_ALEN]; - in_addr_t ip_src; - uint8_t mac_dest[OPENVPN_ETH_ALEN]; - in_addr_t ip_dest; -}; - -struct openvpn_iphdr { -# define OPENVPN_IPH_GET_VER(v) (((v) >> 4) & 0x0F) -# define OPENVPN_IPH_GET_LEN(v) (((v) & 0x0F) << 2) - uint8_t version_len; - - uint8_t tos; - uint16_t tot_len; - uint16_t id; - -# define OPENVPN_IP_OFFMASK 0x1fff - uint16_t frag_off; - - uint8_t ttl; - -# define OPENVPN_IPPROTO_IGMP 2 /* IGMP protocol */ -# define OPENVPN_IPPROTO_TCP 6 /* TCP protocol */ -# define OPENVPN_IPPROTO_UDP 17 /* UDP protocol */ - uint8_t protocol; - - uint16_t check; - uint32_t saddr; - uint32_t daddr; - /*The options start here. */ -}; - -/* - * UDP header - */ -struct openvpn_udphdr { - uint16_t source; - uint16_t dest; - uint16_t len; - uint16_t check; -}; - -/* - * TCP header, per RFC 793. - */ -struct openvpn_tcphdr { - uint16_t source; /* source port */ - uint16_t dest; /* destination port */ - uint32_t seq; /* sequence number */ - uint32_t ack_seq; /* acknowledgement number */ - -# define OPENVPN_TCPH_GET_DOFF(d) (((d) & 0xF0) >> 2) - uint8_t doff_res; - -# define OPENVPN_TCPH_FIN_MASK (1<<0) -# define OPENVPN_TCPH_SYN_MASK (1<<1) -# define OPENVPN_TCPH_RST_MASK (1<<2) -# define OPENVPN_TCPH_PSH_MASK (1<<3) -# define OPENVPN_TCPH_ACK_MASK (1<<4) -# define OPENVPN_TCPH_URG_MASK (1<<5) -# define OPENVPN_TCPH_ECE_MASK (1<<6) -# define OPENVPN_TCPH_CWR_MASK (1<<7) - uint8_t flags; - - uint16_t window; - uint16_t check; - uint16_t urg_ptr; -}; - -#define OPENVPN_TCPOPT_EOL 0 -#define OPENVPN_TCPOPT_NOP 1 -#define OPENVPN_TCPOPT_MAXSEG 2 -#define OPENVPN_TCPOLEN_MAXSEG 4 - -#pragma pack() - -/* - * The following macro is used to update an - * internet checksum. "acc" is a 32-bit - * accumulation of all the changes to the - * checksum (adding in old 16-bit words and - * subtracting out new words), and "cksum" - * is the checksum value to be updated. - */ -#define ADJUST_CHECKSUM(acc, cksum) { \ - (acc) += (cksum); \ - if ((acc) < 0) { \ - (acc) = -(acc); \ - (acc) = ((acc) >> 16) + ((acc) & 0xffff); \ - (acc) += (acc) >> 16; \ - (cksum) = (uint16_t) ~(acc); \ - } else { \ - (acc) = ((acc) >> 16) + ((acc) & 0xffff); \ - (acc) += (acc) >> 16; \ - (cksum) = (uint16_t) (acc); \ - } \ -} - -/* - * We are in a "liberal" position with respect to MSS, - * i.e. we assume that MSS can be calculated from MTU - * by subtracting out only the IP and TCP header sizes - * without options. - * - * (RFC 879, section 7). - */ -#define MTU_TO_MSS(mtu) (mtu - sizeof(struct openvpn_iphdr) \ - - sizeof(struct openvpn_tcphdr)) - -/* - * 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); - -#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); -#endif - -#endif |