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netinet_common.h
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netinet_common.h
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/*
*****************************************************************************
*
* File: netinet_common.h
*
* Author: Damien Stuart (dstuart@dstuart.org)
*
* Purpose: Header file for common network packet structures. We roll our
* own (actually copy) here in an effort to reduce the cross-
* platform "hoop-jumping" we would need to do).
*
* Copyright 2010-2013 Damien Stuart (dstuart@dstuart.org)
*
* License (GNU General Public License):
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*****************************************************************************
*/
#ifndef NETINET_COMMON_H
#define NETINET_COMMON_H
#ifdef WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if HAVE_NETDB_H
#include <netdb.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if PLATFORM_OPENBSD /* OpenBSD hack due to autoconf net/if.h difficulties */
#include <net/if.h>
#include <net/ethertypes.h>
#include <netinet/if_ether.h>
#ifndef ETHER_IS_VALID_LEN
#define ETHER_IS_VALID_LEN(x) \
((x) >= ETHER_MIN_LEN && (x) <= ETHER_MAX_LEN)
#endif
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#if HAVE_NET_ETHERNET_H
#include <net/ethernet.h>
#elif HAVE_SYS_ETHERNET_H
#include <sys/ethernet.h> /* Seems to be where Solaris puts it. */
/* Also probably need to define ETHER_IS_VALID_LEN here */
#ifndef ETHER_IS_VALID_LEN
#define ETHER_IS_VALID_LEN(x) \
((x) >= ETHERMIN && (x) <= ETHERMAX)
#endif
#endif
#endif
/* We will roll our own packet header structs. */
/* The IP header
*/
struct iphdr
{
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned int ihl:4;
unsigned int version:4;
#elif __BYTE_ORDER == __BIG_ENDIAN
unsigned int version:4;
unsigned int ihl:4;
#else
#error "Please fix <bits/endian.h>"
#endif
unsigned char tos;
unsigned short tot_len;
unsigned short id;
unsigned short frag_off;
unsigned char ttl;
unsigned char protocol;
unsigned short check;
unsigned int saddr;
unsigned int daddr;
};
/* The TCP header
*/
struct tcphdr
{
unsigned short source;
unsigned short dest;
unsigned int seq;
unsigned int ack_seq;
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned short res1:4;
unsigned short doff:4;
unsigned short fin:1;
unsigned short syn:1;
unsigned short rst:1;
unsigned short psh:1;
unsigned short ack:1;
unsigned short urg:1;
unsigned short res2:2;
#elif __BYTE_ORDER == __BIG_ENDIAN
unsigned short doff:4;
unsigned short res1:4;
unsigned short res2:2;
unsigned short urg:1;
unsigned short ack:1;
unsigned short psh:1;
unsigned short rst:1;
unsigned short syn:1;
unsigned short fin:1;
#else
#error "Adjust your <bits/endian.h> defines"
#endif
unsigned short window;
unsigned short check;
unsigned short urg_ptr;
};
/* The UDP header
*/
struct udphdr {
unsigned short source; /* source port */
unsigned short dest; /* destination port */
unsigned short len; /* udp length */
unsigned short check; /* udp checksum */
};
/* The ICMP header
*/
struct icmphdr
{
unsigned char type; /* message type */
unsigned char code; /* type sub-code */
unsigned short checksum;
union
{
struct
{
unsigned short id;
unsigned short sequence;
} echo; /* echo datagram */
unsigned int gateway; /* gateway address */
struct
{
unsigned short __notused;
unsigned short mtu;
} frag; /* path mtu discovery */
} un;
};
#define ICMP_ECHOREPLY 0 /* Echo Reply */
#define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
#define ICMP_SOURCE_QUENCH 4 /* Source Quench */
#define ICMP_REDIRECT 5 /* Redirect (change route) */
#define ICMP_ECHO 8 /* Echo Request */
#define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
#define ICMP_PARAMETERPROB 12 /* Parameter Problem */
#define ICMP_TIMESTAMP 13 /* Timestamp Request */
#define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
#define ICMP_INFO_REQUEST 15 /* Information Request */
#define ICMP_INFO_REPLY 16 /* Information Reply */
#define ICMP_ADDRESS 17 /* Address Mask Request */
#define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
#endif /* NETINET_COMMON_H */