icmp.h

* A ncurses user interface. * Network statistics to view the amount of packets and data in many

/*

  This file is part of sniffer, a packet capture utility and
  network moniter
  The author can be contacted at <[e-mail]>
  the lastest version is avilable from 
  http://stev.org

  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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef _SNIFF_ICMP_H
#define _SNIFF_ICMP_H

#include <ncurses.h>

#include "sniff.h"
#include "locks.h"
#include "list.h"
#include "gui_main.h"
#include "ip.h"
#include "tcp.h"
#include "udp.h"

/* ICMP Types */
#define ICMP_ECHOREPLY 0			/* Echo Reply RFC 792 */
/* #define ICMP_ 1 						Unassigned */
/* #define ICMP_ 2 						Unassigned */
#define ICMP_DESTUNREACH 3			/* RFC 792 See ICMP_UNRECH_* */
#define ICMP_SOURCEQUENCH 4			/* RFC 792 No Codes */
#define ICMP_REDIRECT 5				/* RFC 792 See ICMP_REDIRECT_* */
#define ICMP_ALT_HOST 6				/* No Ref  No Codes */
/* #define ICMP_ 7 						Unassigned */
#define ICMP_ECHO 8					/* RFC 792 No Codes */
#define ICMP_ROUTER_ADVERT 9		/* RFC 1256 No Code */
#define ICMP_ROUTER_SELECT 10		/* RFC 1256 No Code */
#define ICMP_TIMEEXCEEDED 11		/* RFC 792 See ICMP_TTL_* */
#define ICMP_PARMPROBLEM 12			/* RFC 792 See ICMP_PARAM_* */
#define ICMP_TIMESTAMP 13			/* RFC 792 No CODES */
#define ICMP_TIMESTAMP_REPLY 14		/* RFC 792 No Codes */
#define ICMP_INFO_REQUEST 15		/* RFC 792 No Codes */
#define ICMP_INFO_REPLY 16			/* RFC 792 No Codes */
#define ICMP_ADDRMASK_REQUEST 17	/* RFC 950 No Codes */
#define ICMP_ADDRMASK_REPLY 18		/* RFC 950 No Codes */
/* #define ICMP_ 19						Reserved (Security) */
/* #define ICMP_ 20-29					Reserved for Experiment */
#define ICMP_TRACEROUTE 30			/* RFC 1393 */
#define ICMP_DATAGRAM_CONVERROR 31	/* RFC 1475 */
#define ICMP_MOBILE_HOST_REDIRECT 32/* David Johnson */
#define ICMP_IPV6_WHEREAREYOU 33	/* Bill Simpson */
#define ICMP_IPV6_IAMHERE 34		/* Bill Simpson */
#define ICMP_MOBILE_REG_REQUEST 35	/* Bill Simpson */
#define ICMP_MOBILE_REG_REPLY 36	/* Bill Simpson */
#define ICMP_DOMAIN_NAME_REQUEST 37	/* Simpson */
#define ICMP_DOMAIN_NAME_REPLY 38	/* Simpson */
#define ICMP_SKIP 39				/* Markson */
#define ICMP_PHOTURIS 40			/* Simpson */
/* #define ICMP_ 41-255					Reserved */


/* the following are in RFC 792 if not otherwise stated */
#define ICMP_UNREACH_NET 0				/* Net Unreachable */
#define ICMP_UNREACH_HOST 1				/* Host Unmreachable */
#define ICMP_UNREACH_PROTOCOL 2			/* Protocol */
#define ICMP_UNREACH_PORT 3				/* Port */
#define ICMP_UNREACH_FRAGNEEDED 4		/* Only When Dont Frag was set */
#define ICMP_UNREACH_SOURCEROUTE 5		/* Source Route Failed */
#define ICMP_UNREACH_DESTNETWORK 6		/* Dest Network Unreachable */
#define ICMP_UNREACH_DESTHOST 7			/* Dest Host Unreachable */
#define ICMP_UNREACH_SOURCEHOST 8		/* Source Host Unreach */
#define ICMP_UNREACH_PROHIB_NETWORK 9	/* Filted */
#define ICMP_UNREACH_PROHIB_HOST 10		/* Filted */
#define ICMP_UNREACH_DESTNETWORK_TOS 11	/* Network for TOS */
#define ICMP_UNREACH_DESTHOST_TOS 12	/* Host for TOS */
#define ICMP_UNREACH_PROHIB_ADMIN 13	/* RFC 1812 */
#define ICMP_UNREACH_PRECEDENCE_HOST 14	/* RFC 1812 */
#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* RFC 1812 */

#define ICMP_REDIRECT_NETWORK 0			/* redirect whole network */
#define ICMP_REDIRECT_HOST 1
#define ICMP_REDIRECT_TOS_NETWORK 2
#define ICMP_REDIRECT_TOS_HOST 3

#define ICMP_TTL_TTL 0					/* TTL in ip header */
#define ICMP_TTL_FRAG 1 				/* Fragment reassemlt timeout */

#define ICMP_PARAM_POINTER 0 			/* pointer indicates the error */
#define ICMP_PARAM_MISSING 1 			/* missing an option  RFC 1108 */
#define ICMP_PARAM_BADLEN  2			 /* bad length */


struct pkt_icmp {
	unsigned char	type;
	unsigned char	code;
	unsigned short	check;
	union {
		struct {
			unsigned short	id;
			unsigned short	sequence;
		} echo;
		unsigned long	gateway;
		struct {
			unsigned short	unused;
			unsigned short	mtu;
		} frag;
	} un;
};


struct icmp_type_t {
	unsigned char type;		/* icmp->type */
	char *desc;				/* description of the type */
	int (*func) (struct sniff_pkt *pkt, char *buf, int buffleft, struct pkt_ip *ip, struct pkt_icmp *icmp); /* function for further processing */
	struct list_t *code;	/* code only if required */
	unsigned char	log:1;	/* log this data ? */
};

struct icmp_code_t {
	unsigned code;
	char *desc;
	int (*func) (struct sniff_pkt *pkt, char *buf, int buffleft, struct pkt_ip *ip, struct pkt_icmp *icmp);	/* further processing ? */
	unsigned char	log:1;	/* log this data ? */

};

extern struct list_t *icmp_type;
extern struct list_t *icmp_unreach;
extern struct list_t *icmp_redirect;
extern struct list_t *icmp_ttl;
extern struct list_t *icmp_param;

extern struct gen_stat icmp_stat;

extern WINDOW *icmp_gui_window;
extern pthread_mutex_t icmp_gui_mutex;
extern FILE *icmp_log;

extern struct icmp_type_t icmp_base_type[];
extern struct icmp_code_t icmp_base_unreach[];
extern struct icmp_code_t icmp_base_redirect[];
extern struct icmp_code_t icmp_base_ttl[];
extern struct icmp_code_t icmp_base_param[];

extern int icmp_handle		   (struct sniff_pkt *pkt, struct pkt_ip *ip , struct pkt_icmp *icmp);
extern inline int icmp_log_any (struct sniff_pkt *pkt, char *ip_source, char *ip_dest, struct pkt_ip *ip, struct pkt_icmp *icmp);
extern inline int icmp_log_type(struct sniff_pkt *pkt, char *ip_source, char *ip_dest, struct icmp_type_t *type, struct pkt_ip *ip, struct pkt_icmp *icmp);
extern inline int icmp_log_code(struct sniff_pkt *pkt, char *ip_source, char *ip_dest, struct icmp_type_t *type, struct pkt_ip *ip, struct pkt_icmp *icmp);

extern int icmp_ping		(struct sniff_pkt *pkt, char *buf, int buffleft, struct pkt_ip *ip, struct pkt_icmp *icmp);
extern int icmp_ping_reply	(struct sniff_pkt *pkt, char *buf, int buffleft, struct pkt_ip *ip, struct pkt_icmp *icmp);
extern int icmp_do			(struct sniff_pkt *pkt, char *buf, int buffleft, struct pkt_ip *ip, struct pkt_icmp *icmp);
extern int icmp_proto		(struct sniff_pkt *pkt, char *buf, int buffleft, struct pkt_ip *ip, struct pkt_icmp *icmp);
extern int icmp_cmp_type	(const struct icmp_type_t *c1, const struct icmp_type_t *c2);
extern int icmp_cmp_code	(const struct icmp_code_t *c1, const struct icmp_code_t *c2);
extern int icmp_init		( void );
extern struct list_t *icmp_init_codes	(int type, struct icmp_code_t codes[]);
extern void icmp_gui(struct gui_t *p, int y, int x);
extern int icmp_gui_print(char *fmt, ...);

#endif /* _SNIFF_ICMP_H */