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Diffstat (limited to 'openvpn/tap-win32/proto.h')
| -rwxr-xr-x | openvpn/tap-win32/proto.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/openvpn/tap-win32/proto.h b/openvpn/tap-win32/proto.h new file mode 100755 index 0000000..6a70beb --- /dev/null +++ b/openvpn/tap-win32/proto.h @@ -0,0 +1,168 @@ +/* + * TAP-Win32 -- A kernel driver to provide virtual tap device functionality + * on Windows. Originally derived from the CIPE-Win32 + * project by Damion K. Wilson, with extensive modifications by + * James Yonan. + * + * All source code which derives from the CIPE-Win32 project is + * Copyright (C) Damion K. Wilson, 2003, and is released under the + * GPL version 2 (see below). + * + * All other source code is Copyright (C) 2002-2005 OpenVPN Solutions LLC, + * and is released under the GPL version 2 (see below). + * + * 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 + */ + +//============================================================ +// MAC address, Ethernet header, and ARP +//============================================================ + +#pragma pack(1) + +#define IP_HEADER_SIZE 20 + +typedef unsigned char MACADDR [6]; +typedef unsigned long IPADDR; + +//----------------- +// Ethernet address +//----------------- + +typedef struct { + MACADDR addr; +} ETH_ADDR; + +typedef struct { + ETH_ADDR list[NIC_MAX_MCAST_LIST]; +} MC_LIST; + +//---------------- +// Ethernet header +//---------------- + +typedef struct +{ + MACADDR dest; /* destination eth addr */ + MACADDR src; /* source ether addr */ + +# define ETH_P_IP 0x0800 /* IPv4 protocol */ +# define ETH_P_ARP 0x0806 /* ARP protocol */ + USHORT proto; /* packet type ID field */ +} ETH_HEADER, *PETH_HEADER; + +//---------------- +// ARP packet +//---------------- + +typedef struct + { + MACADDR m_MAC_Destination; // Reverse these two + MACADDR m_MAC_Source; // to answer ARP requests + USHORT m_Proto; // 0x0806 + +# define MAC_ADDR_TYPE 0x0001 + USHORT m_MAC_AddressType; // 0x0001 + + USHORT m_PROTO_AddressType; // 0x0800 + UCHAR m_MAC_AddressSize; // 0x06 + UCHAR m_PROTO_AddressSize; // 0x04 + +# define ARP_REQUEST 0x0001 +# define ARP_REPLY 0x0002 + USHORT m_ARP_Operation; // 0x0001 for ARP request, 0x0002 for ARP reply + + MACADDR m_ARP_MAC_Source; + IPADDR m_ARP_IP_Source; + MACADDR m_ARP_MAC_Destination; + IPADDR m_ARP_IP_Destination; + } +ARP_PACKET, *PARP_PACKET; + +//---------- +// IP Header +//---------- + +typedef struct { +# define IPH_GET_VER(v) (((v) >> 4) & 0x0F) +# define IPH_GET_LEN(v) (((v) & 0x0F) << 2) + UCHAR version_len; + + UCHAR tos; + USHORT tot_len; + USHORT id; + +# define IP_OFFMASK 0x1fff + USHORT frag_off; + + UCHAR ttl; + +# define IPPROTO_UDP 17 /* UDP protocol */ +# define IPPROTO_TCP 6 /* TCP protocol */ +# define IPPROTO_ICMP 1 /* ICMP protocol */ +# define IPPROTO_IGMP 2 /* IGMP protocol */ + UCHAR protocol; + + USHORT check; + ULONG saddr; + ULONG daddr; + /* The options start here. */ +} IPHDR; + +//----------- +// UDP header +//----------- + +typedef struct { + USHORT source; + USHORT dest; + USHORT len; + USHORT check; +} UDPHDR; + +//-------------------------- +// TCP header, per RFC 793. +//-------------------------- + +typedef struct { + USHORT source; /* source port */ + USHORT dest; /* destination port */ + ULONG seq; /* sequence number */ + ULONG ack_seq; /* acknowledgement number */ + +# define TCPH_GET_DOFF(d) (((d) & 0xF0) >> 2) + UCHAR doff_res; + +# define TCPH_FIN_MASK (1<<0) +# define TCPH_SYN_MASK (1<<1) +# define TCPH_RST_MASK (1<<2) +# define TCPH_PSH_MASK (1<<3) +# define TCPH_ACK_MASK (1<<4) +# define TCPH_URG_MASK (1<<5) +# define TCPH_ECE_MASK (1<<6) +# define TCPH_CWR_MASK (1<<7) + UCHAR flags; + + USHORT window; + USHORT check; + USHORT urg_ptr; +} TCPHDR; + +#define TCPOPT_EOL 0 +#define TCPOPT_NOP 1 +#define TCPOPT_MAXSEG 2 +#define TCPOLEN_MAXSEG 4 + +#pragma pack() |