xref: /illumos-gate/usr/src/cmd/ipf/lib/common/ipft_ef.c (revision ab25eeb5)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * Copyright (C) 1993-2001 by Darren Reed.
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * See the IPFILTER.LICENCE file for details on licencing.
57c478bd9Sstevel@tonic-gate  *
6*ab25eeb5Syz  * $Id: ipft_ef.c,v 1.14 2004/01/08 13:34:31 darrenr Exp $
77c478bd9Sstevel@tonic-gate  */
87c478bd9Sstevel@tonic-gate 
97c478bd9Sstevel@tonic-gate /*
107c478bd9Sstevel@tonic-gate                                             icmp type
117c478bd9Sstevel@tonic-gate  lnth proto         source     destination   src port   dst port
127c478bd9Sstevel@tonic-gate 
137c478bd9Sstevel@tonic-gate etherfind -n
147c478bd9Sstevel@tonic-gate 
157c478bd9Sstevel@tonic-gate    60  tcp   128.250.20.20  128.250.133.13       2419     telnet
167c478bd9Sstevel@tonic-gate 
177c478bd9Sstevel@tonic-gate etherfind -n -t
187c478bd9Sstevel@tonic-gate 
197c478bd9Sstevel@tonic-gate  0.32    91   04    131.170.1.10  128.250.133.13
207c478bd9Sstevel@tonic-gate  0.33   566  udp  128.250.37.155   128.250.133.3        901        901
217c478bd9Sstevel@tonic-gate */
227c478bd9Sstevel@tonic-gate 
237c478bd9Sstevel@tonic-gate #include "ipf.h"
247c478bd9Sstevel@tonic-gate #include "ipt.h"
257c478bd9Sstevel@tonic-gate 
26*ab25eeb5Syz #ifndef linux
277c478bd9Sstevel@tonic-gate #include <netinet/ip_var.h>
28*ab25eeb5Syz #endif
297c478bd9Sstevel@tonic-gate #include <netinet/tcpip.h>
307c478bd9Sstevel@tonic-gate 
317c478bd9Sstevel@tonic-gate 
327c478bd9Sstevel@tonic-gate #if !defined(lint)
337c478bd9Sstevel@tonic-gate static const char sccsid[] = "@(#)ipft_ef.c	1.6 2/4/96 (C)1995 Darren Reed";
34*ab25eeb5Syz static const char rcsid[] = "@(#)$Id: ipft_ef.c,v 1.14 2004/01/08 13:34:31 darrenr Exp $";
357c478bd9Sstevel@tonic-gate #endif
367c478bd9Sstevel@tonic-gate 
377c478bd9Sstevel@tonic-gate static	int	etherf_open __P((char *));
387c478bd9Sstevel@tonic-gate static	int	etherf_close __P((void));
397c478bd9Sstevel@tonic-gate static	int	etherf_readip __P((char *, int, char **, int *));
407c478bd9Sstevel@tonic-gate 
417c478bd9Sstevel@tonic-gate struct	ipread	etherf = { etherf_open, etherf_close, etherf_readip, 0 };
427c478bd9Sstevel@tonic-gate 
437c478bd9Sstevel@tonic-gate static	FILE	*efp = NULL;
447c478bd9Sstevel@tonic-gate static	int	efd = -1;
457c478bd9Sstevel@tonic-gate 
467c478bd9Sstevel@tonic-gate 
etherf_open(fname)477c478bd9Sstevel@tonic-gate static	int	etherf_open(fname)
487c478bd9Sstevel@tonic-gate char	*fname;
497c478bd9Sstevel@tonic-gate {
507c478bd9Sstevel@tonic-gate 	if (efd != -1)
517c478bd9Sstevel@tonic-gate 		return efd;
527c478bd9Sstevel@tonic-gate 
537c478bd9Sstevel@tonic-gate 	if (!strcmp(fname, "-")) {
547c478bd9Sstevel@tonic-gate 		efd = 0;
557c478bd9Sstevel@tonic-gate 		efp = stdin;
567c478bd9Sstevel@tonic-gate 	} else {
577c478bd9Sstevel@tonic-gate 		efd = open(fname, O_RDONLY);
587c478bd9Sstevel@tonic-gate 		efp = fdopen(efd, "r");
597c478bd9Sstevel@tonic-gate 	}
607c478bd9Sstevel@tonic-gate 	return efd;
617c478bd9Sstevel@tonic-gate }
627c478bd9Sstevel@tonic-gate 
637c478bd9Sstevel@tonic-gate 
etherf_close()647c478bd9Sstevel@tonic-gate static	int	etherf_close()
657c478bd9Sstevel@tonic-gate {
667c478bd9Sstevel@tonic-gate 	return close(efd);
677c478bd9Sstevel@tonic-gate }
687c478bd9Sstevel@tonic-gate 
697c478bd9Sstevel@tonic-gate 
etherf_readip(buf,cnt,ifn,dir)707c478bd9Sstevel@tonic-gate static	int	etherf_readip(buf, cnt, ifn, dir)
717c478bd9Sstevel@tonic-gate char	*buf, **ifn;
727c478bd9Sstevel@tonic-gate int	cnt, *dir;
737c478bd9Sstevel@tonic-gate {
747c478bd9Sstevel@tonic-gate 	struct	tcpiphdr pkt;
757c478bd9Sstevel@tonic-gate 	ip_t	*ip = (ip_t *)&pkt;
767c478bd9Sstevel@tonic-gate 	char	src[16], dst[16], sprt[16], dprt[16];
777c478bd9Sstevel@tonic-gate 	char	lbuf[128], len[8], prot[8], time[8], *s;
787c478bd9Sstevel@tonic-gate 	int	slen, extra = 0, i;
797c478bd9Sstevel@tonic-gate 
807c478bd9Sstevel@tonic-gate 	if (!fgets(lbuf, sizeof(lbuf) - 1, efp))
817c478bd9Sstevel@tonic-gate 		return 0;
827c478bd9Sstevel@tonic-gate 
837c478bd9Sstevel@tonic-gate 	if ((s = strchr(lbuf, '\n')))
847c478bd9Sstevel@tonic-gate 		*s = '\0';
857c478bd9Sstevel@tonic-gate 	lbuf[sizeof(lbuf)-1] = '\0';
867c478bd9Sstevel@tonic-gate 
877c478bd9Sstevel@tonic-gate 	bzero(&pkt, sizeof(pkt));
887c478bd9Sstevel@tonic-gate 
897c478bd9Sstevel@tonic-gate 	if (sscanf(lbuf, "%7s %7s %15s %15s %15s %15s", len, prot, src, dst,
907c478bd9Sstevel@tonic-gate 		   sprt, dprt) != 6)
917c478bd9Sstevel@tonic-gate 		if (sscanf(lbuf, "%7s %7s %7s %15s %15s %15s %15s", time,
927c478bd9Sstevel@tonic-gate 			   len, prot, src, dst, sprt, dprt) != 7)
937c478bd9Sstevel@tonic-gate 			return -1;
947c478bd9Sstevel@tonic-gate 
957c478bd9Sstevel@tonic-gate 	ip->ip_p = getproto(prot);
967c478bd9Sstevel@tonic-gate 
977c478bd9Sstevel@tonic-gate 	switch (ip->ip_p) {
987c478bd9Sstevel@tonic-gate 	case IPPROTO_TCP :
997c478bd9Sstevel@tonic-gate 	case IPPROTO_UDP :
1007c478bd9Sstevel@tonic-gate 		s = strtok(NULL, " :");
1017c478bd9Sstevel@tonic-gate 		ip->ip_len += atoi(s);
1027c478bd9Sstevel@tonic-gate 		if (ip->ip_p == IPPROTO_TCP)
1037c478bd9Sstevel@tonic-gate 			extra = sizeof(struct tcphdr);
1047c478bd9Sstevel@tonic-gate 		else if (ip->ip_p == IPPROTO_UDP)
1057c478bd9Sstevel@tonic-gate 			extra = sizeof(struct udphdr);
1067c478bd9Sstevel@tonic-gate 		break;
1077c478bd9Sstevel@tonic-gate #ifdef	IGMP
1087c478bd9Sstevel@tonic-gate 	case IPPROTO_IGMP :
1097c478bd9Sstevel@tonic-gate 		extra = sizeof(struct igmp);
1107c478bd9Sstevel@tonic-gate 		break;
1117c478bd9Sstevel@tonic-gate #endif
1127c478bd9Sstevel@tonic-gate 	case IPPROTO_ICMP :
1137c478bd9Sstevel@tonic-gate 		extra = sizeof(struct icmp);
1147c478bd9Sstevel@tonic-gate 		break;
1157c478bd9Sstevel@tonic-gate 	default :
1167c478bd9Sstevel@tonic-gate 		break;
1177c478bd9Sstevel@tonic-gate 	}
1187c478bd9Sstevel@tonic-gate 
1197c478bd9Sstevel@tonic-gate 	(void) inet_aton(src, &ip->ip_src);
1207c478bd9Sstevel@tonic-gate 	(void) inet_aton(dst, &ip->ip_dst);
1217c478bd9Sstevel@tonic-gate 	ip->ip_len = atoi(len);
1227c478bd9Sstevel@tonic-gate 	IP_HL_A(ip, sizeof(ip_t));
1237c478bd9Sstevel@tonic-gate 
1247c478bd9Sstevel@tonic-gate 	slen = IP_HL(ip) + extra;
1257c478bd9Sstevel@tonic-gate 	i = MIN(cnt, slen);
1267c478bd9Sstevel@tonic-gate 	bcopy((char *)&pkt, buf, i);
1277c478bd9Sstevel@tonic-gate 	return i;
1287c478bd9Sstevel@tonic-gate }
129