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/*
Copyright (c) 2000
International Computer Science Institute
All rights reserved.
This file may contain software code originally developed for the
Sting project. The Sting software carries the following copyright:
Copyright (c) 1998, 1999
Stefan Savage and the University of Washington.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgment:
This product includes software developed by ACIRI, the AT&T
Center for Internet Research at ICSI (the International Computer
Science Institute). This product may also include software developed
by Stefan Savage at the University of Washington.
4. The names of ACIRI, ICSI, Stefan Savage and University of Washington
may not be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY ICSI AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL ICSI OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
#ifndef _INET_H_
#define _INET_H_
/* XXX These are machine/compiler dependent */
typedef unsigned char uint8;
typedef unsigned short uint16;
typedef unsigned int uint32;
#define IPPROTOCOL_ICMP 1
#define IPPROTOCOL_IGMP 2
#define IPPROTOCOL_TCP 6
#define IPPROTOCOL_UDP 17
#define IP_DF 0x4000
/* ICMP type */
#define ICMP_TIMXCEED 11
/* TCP Flags */
#define TCPFLAGS_FIN 0x01
#define TCPFLAGS_SYN 0x02
#define TCPFLAGS_RST 0x04
#define TCPFLAGS_PSH 0x08
#define TCPFLAGS_ACK 0x10
#define TCPFLAGS_URG 0x20
#define TCPFLAGS_ECN_ECHO 0x40
#define TCPFLAGS_CWR 0x80
/* IP Options Parameters -- for IP Options te*/
#define IPOPT_EOL 0x0
#define IPOLEN_EOL 0x1
#define IPOPT_NOP 0x1
#define IPOLEN_NOP 0x1
#define IPOPT_RR 0x7
#define IPOLEN_RR 0x27 /* Maximum length; up to 9 IP addresses */
#define IPOPT_TS 0x44
#define IPOLEN_TS 0x28
#define IPOPT_FAKED 0xff
#define IPOLEN_FAKED 0x4
/* TCP Options Parameters */
#define TCPOPT_EOL 0
#define TCPOLEN_EOL 1
#define TCPOPT_NOP 1
#define TCPOLEN_NOP 1
#define TCPOPT_MAXSEG 2
#define TCPOLEN_MAXSEG 4
#define TCPOPT_WINDOW 3
#define TCPOLEN_WINDOW 3
#define TCPOPT_SACK_PERMITTED 4
#define TCPOLEN_SACK_PERMITTED 2
#define TCPOPT_SACK 5
#define TCPOPT_TIMESTAMP 8
#define TCPOLEN_TIMESTAMP 10
#define TCPOPT_FAKED 0x19
#define TCPOLEN_FAKED 0x4
struct IpHeader {
uint8 ip_vhl; /* version (4bits) & header length (4 bits) */
uint8 ip_tos; /* type of service */
uint16 ip_len; /* length of IP datagram */
uint16 ip_id; /* identification (for frags) */
uint16 ip_off; /* offset (within a fragment) and flags (3 bits) */
uint8 ip_ttl; /* time to live */
uint8 ip_p; /* protocol number */
uint16 ip_xsum; /* checksum */
uint32 ip_src; /* source address */
uint32 ip_dst; /* destination address */
};
/* Pseudo header for doing TCP checksum calculation */
struct PseudoIpHeader {
uint32 filler[2];
uint8 zero;
uint8 ip_p;
uint16 ip_len;
uint32 ip_src;
uint32 ip_dst;
};
struct TcpHeader {
uint16 tcp_sport; /* source port */
uint16 tcp_dport; /* destination port */
uint32 tcp_seq; /* sequence number */
uint32 tcp_ack; /* acknoledgement number */
uint8 tcp_hl; /* header length (4 bits) */
uint8 tcp_flags; /* flags */
uint16 tcp_win; /* advertized window size */
uint16 tcp_xsum; /* checksum */
uint16 tcp_urp; /* urgent pointer */
};
struct IcmpHeader {
uint8 icmp_type; /* ICMP message type */
uint8 icmp_code; /* Message code */
uint16 icmp_xsum; /* checksum */
uint16 icmp_unused; /* unused field */
uint16 icmp_mtu; /* MTU of limiting interface */
};
struct IPPacket {
struct IpHeader *ip;
struct TcpHeader *tcp;
};
struct ICMPUnreachableErrorPacket {
struct IpHeader ip;
struct IcmpHeader icmp;
struct IpHeader off_ip;
/* 8-first bytes of TCP header */
uint16 tcp_sport;
uint16 tcp_dport;
uint32 tcp_seqno;
};
struct ICMPTimeExceededErrorPacket {
struct IpHeader ip;
struct IcmpHeader icmp;
struct IpHeader off_ip;
/* 8-first bytes of Tcpheader */
uint16 tcp_sport;
uint16 tcp_dport;
uint32 tcp_seqno;
};
char *InetAddress(uint32 addr);
uint16 InetChecksum(uint16 *ip_addr, uint16 *tcp_addr, uint16 ip_len, uint16 tcp_len);
void PrintTcpPacket(struct IPPacket *p);
void PrintICMPUnreachableErrorPacket(struct ICMPUnreachableErrorPacket *p);
void WriteIPPacket(struct IPPacket *p,
uint32 src,
uint32 dst,
uint16 sport,
uint16 dport,
uint32 seq,
uint32 ack,
uint8 flags,
uint16 win,
uint16 urp,
uint16 datalen,
uint16 ip_optlen,
uint16 optlen,
uint8 iptos,
uint8 u4tf);
void ReadIPPacket(struct IPPacket *p, uint32 *src, uint32 *dst,
uint16 *sport, uint16 *dport, uint32 *seq, uint32 *ack,
uint8 *flags, uint16 *win, uint16 *urp, uint16 *datalen,
uint16 *ip_optlen, uint16 *optlen);
void StorePacket (struct IPPacket *p);
struct IPPacket *FindHeaderBoundaries(char *p);
struct IPPacket *AllocateIPPacket(int ip_optlen, int tcp_optlen, int datalen, char *str);
void FreeIPPacket(struct IPPacket **pkt_p);
#endif /* _INET_H_ */
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