1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * Copyright (C) 1993-2001 by Darren Reed. 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * See the IPFILTER.LICENCE file for details on licencing. 5*0Sstevel@tonic-gate * 6*0Sstevel@tonic-gate * $Id: ipft_ef.c,v 1.11 2003/06/02 12:22:49 darrenr Exp $ 7*0Sstevel@tonic-gate */ 8*0Sstevel@tonic-gate 9*0Sstevel@tonic-gate /* 10*0Sstevel@tonic-gate icmp type 11*0Sstevel@tonic-gate lnth proto source destination src port dst port 12*0Sstevel@tonic-gate 13*0Sstevel@tonic-gate etherfind -n 14*0Sstevel@tonic-gate 15*0Sstevel@tonic-gate 60 tcp 128.250.20.20 128.250.133.13 2419 telnet 16*0Sstevel@tonic-gate 17*0Sstevel@tonic-gate etherfind -n -t 18*0Sstevel@tonic-gate 19*0Sstevel@tonic-gate 0.32 91 04 131.170.1.10 128.250.133.13 20*0Sstevel@tonic-gate 0.33 566 udp 128.250.37.155 128.250.133.3 901 901 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate 23*0Sstevel@tonic-gate #include "ipf.h" 24*0Sstevel@tonic-gate #include "ipt.h" 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate #undef ICMP_MAXTYPE 27*0Sstevel@tonic-gate #include <netinet/ip_icmp.h> 28*0Sstevel@tonic-gate #include <netinet/ip_var.h> 29*0Sstevel@tonic-gate #include <netinet/udp.h> 30*0Sstevel@tonic-gate #include <netinet/tcpip.h> 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #if !defined(lint) 34*0Sstevel@tonic-gate static const char sccsid[] = "@(#)ipft_ef.c 1.6 2/4/96 (C)1995 Darren Reed"; 35*0Sstevel@tonic-gate static const char rcsid[] = "@(#)$Id: ipft_ef.c,v 1.11 2003/06/02 12:22:49 darrenr Exp $"; 36*0Sstevel@tonic-gate #endif 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate static int etherf_open __P((char *)); 39*0Sstevel@tonic-gate static int etherf_close __P((void)); 40*0Sstevel@tonic-gate static int etherf_readip __P((char *, int, char **, int *)); 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate struct ipread etherf = { etherf_open, etherf_close, etherf_readip, 0 }; 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate static FILE *efp = NULL; 45*0Sstevel@tonic-gate static int efd = -1; 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate static int etherf_open(fname) 49*0Sstevel@tonic-gate char *fname; 50*0Sstevel@tonic-gate { 51*0Sstevel@tonic-gate if (efd != -1) 52*0Sstevel@tonic-gate return efd; 53*0Sstevel@tonic-gate 54*0Sstevel@tonic-gate if (!strcmp(fname, "-")) { 55*0Sstevel@tonic-gate efd = 0; 56*0Sstevel@tonic-gate efp = stdin; 57*0Sstevel@tonic-gate } else { 58*0Sstevel@tonic-gate efd = open(fname, O_RDONLY); 59*0Sstevel@tonic-gate efp = fdopen(efd, "r"); 60*0Sstevel@tonic-gate } 61*0Sstevel@tonic-gate return efd; 62*0Sstevel@tonic-gate } 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate static int etherf_close() 66*0Sstevel@tonic-gate { 67*0Sstevel@tonic-gate return close(efd); 68*0Sstevel@tonic-gate } 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate static int etherf_readip(buf, cnt, ifn, dir) 72*0Sstevel@tonic-gate char *buf, **ifn; 73*0Sstevel@tonic-gate int cnt, *dir; 74*0Sstevel@tonic-gate { 75*0Sstevel@tonic-gate struct tcpiphdr pkt; 76*0Sstevel@tonic-gate ip_t *ip = (ip_t *)&pkt; 77*0Sstevel@tonic-gate char src[16], dst[16], sprt[16], dprt[16]; 78*0Sstevel@tonic-gate char lbuf[128], len[8], prot[8], time[8], *s; 79*0Sstevel@tonic-gate int slen, extra = 0, i; 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate if (!fgets(lbuf, sizeof(lbuf) - 1, efp)) 82*0Sstevel@tonic-gate return 0; 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate if ((s = strchr(lbuf, '\n'))) 85*0Sstevel@tonic-gate *s = '\0'; 86*0Sstevel@tonic-gate lbuf[sizeof(lbuf)-1] = '\0'; 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate bzero(&pkt, sizeof(pkt)); 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate if (sscanf(lbuf, "%7s %7s %15s %15s %15s %15s", len, prot, src, dst, 91*0Sstevel@tonic-gate sprt, dprt) != 6) 92*0Sstevel@tonic-gate if (sscanf(lbuf, "%7s %7s %7s %15s %15s %15s %15s", time, 93*0Sstevel@tonic-gate len, prot, src, dst, sprt, dprt) != 7) 94*0Sstevel@tonic-gate return -1; 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate ip->ip_p = getproto(prot); 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate switch (ip->ip_p) { 99*0Sstevel@tonic-gate case IPPROTO_TCP : 100*0Sstevel@tonic-gate case IPPROTO_UDP : 101*0Sstevel@tonic-gate s = strtok(NULL, " :"); 102*0Sstevel@tonic-gate ip->ip_len += atoi(s); 103*0Sstevel@tonic-gate if (ip->ip_p == IPPROTO_TCP) 104*0Sstevel@tonic-gate extra = sizeof(struct tcphdr); 105*0Sstevel@tonic-gate else if (ip->ip_p == IPPROTO_UDP) 106*0Sstevel@tonic-gate extra = sizeof(struct udphdr); 107*0Sstevel@tonic-gate break; 108*0Sstevel@tonic-gate #ifdef IGMP 109*0Sstevel@tonic-gate case IPPROTO_IGMP : 110*0Sstevel@tonic-gate extra = sizeof(struct igmp); 111*0Sstevel@tonic-gate break; 112*0Sstevel@tonic-gate #endif 113*0Sstevel@tonic-gate case IPPROTO_ICMP : 114*0Sstevel@tonic-gate extra = sizeof(struct icmp); 115*0Sstevel@tonic-gate break; 116*0Sstevel@tonic-gate default : 117*0Sstevel@tonic-gate break; 118*0Sstevel@tonic-gate } 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate (void) inet_aton(src, &ip->ip_src); 121*0Sstevel@tonic-gate (void) inet_aton(dst, &ip->ip_dst); 122*0Sstevel@tonic-gate ip->ip_len = atoi(len); 123*0Sstevel@tonic-gate IP_HL_A(ip, sizeof(ip_t)); 124*0Sstevel@tonic-gate 125*0Sstevel@tonic-gate slen = IP_HL(ip) + extra; 126*0Sstevel@tonic-gate i = MIN(cnt, slen); 127*0Sstevel@tonic-gate bcopy((char *)&pkt, buf, i); 128*0Sstevel@tonic-gate return i; 129*0Sstevel@tonic-gate } 130