projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| 984263bc MD |
1 | /* |
| 2 | * Copyright (C) 1993-2001 by Darren Reed. | |
| 3 | * | |
| 4 | * See the IPFILTER.LICENCE file for details on licencing. | |
| 5 | */ | |
| 6 | ||
| 7 | /* | |
| 8 | icmp type | |
| 9 | lnth proto source destination src port dst port | |
| 10 | ||
| 11 | etherfind -n | |
| 12 | ||
| 13 | 60 tcp 128.250.20.20 128.250.133.13 2419 telnet | |
| 14 | ||
| 15 | etherfind -n -t | |
| 16 | ||
| 17 | 0.32 91 04 131.170.1.10 128.250.133.13 | |
| 18 | 0.33 566 udp 128.250.37.155 128.250.133.3 901 901 | |
| 19 | */ | |
| 20 | #if defined(__sgi) && (IRIX > 602) | |
| 21 | # include <sys/ptimers.h> | |
| 22 | #endif | |
| 23 | #include <stdio.h> | |
| 24 | #include <string.h> | |
| 25 | #if !defined(__SVR4) && !defined(__GNUC__) | |
| 26 | #include <strings.h> | |
| 27 | #endif | |
| 28 | #include <sys/types.h> | |
| 29 | #include <stdlib.h> | |
| 30 | #include <unistd.h> | |
| 31 | #include <stddef.h> | |
| 32 | #include <sys/socket.h> | |
| 33 | #include <sys/ioctl.h> | |
| 34 | #include <sys/param.h> | |
| 35 | #include <sys/time.h> | |
| 36 | #include <netinet/in.h> | |
| 37 | #include <arpa/inet.h> | |
| 38 | #include <netinet/in_systm.h> | |
| 39 | #ifndef linux | |
| 40 | #include <netinet/ip_var.h> | |
| 41 | #endif | |
| 42 | #include <netinet/ip.h> | |
| 43 | #include <netinet/tcp.h> | |
| 44 | #include <netinet/udp.h> | |
| 45 | #include <netinet/ip_icmp.h> | |
| 46 | #include <net/if.h> | |
| 47 | #include <netdb.h> | |
| 48 | #include "ip_compat.h" | |
| 49 | #include <netinet/tcpip.h> | |
| 50 | #include "ipf.h" | |
| 51 | #include "ipt.h" | |
| 52 | ||
| 53 | #if !defined(lint) | |
| 54 | static const char sccsid[] = "@(#)ipft_ef.c 1.6 2/4/96 (C)1995 Darren Reed"; | |
| 91865926 | 55 | static const char rcsid[] = "@(#)$Id: ipft_ef.c,v 2.2.2.5 2003/05/19 12:02:35 darrenr Exp $"; |
| 984263bc MD |
56 | #endif |
| 57 | ||
| 58 | static int etherf_open __P((char *)); | |
| 59 | static int etherf_close __P((void)); | |
| 60 | static int etherf_readip __P((char *, int, char **, int *)); | |
| 61 | ||
| 62 | struct ipread etherf = { etherf_open, etherf_close, etherf_readip }; | |
| 63 | ||
| 64 | static FILE *efp = NULL; | |
| 65 | static int efd = -1; | |
| 66 | ||
| 67 | ||
| 68 | static int etherf_open(fname) | |
| 69 | char *fname; | |
| 70 | { | |
| 71 | if (efd != -1) | |
| 72 | return efd; | |
| 73 | ||
| 74 | if (!strcmp(fname, "-")) { | |
| 75 | efd = 0; | |
| 76 | efp = stdin; | |
| 77 | } else { | |
| 78 | efd = open(fname, O_RDONLY); | |
| 79 | efp = fdopen(efd, "r"); | |
| 80 | } | |
| 81 | return efd; | |
| 82 | } | |
| 83 | ||
| 84 | ||
| 85 | static int etherf_close() | |
| 86 | { | |
| 87 | return close(efd); | |
| 88 | } | |
| 89 | ||
| 90 | ||
| 91 | static int etherf_readip(buf, cnt, ifn, dir) | |
| 92 | char *buf, **ifn; | |
| 93 | int cnt, *dir; | |
| 94 | { | |
| 95 | struct tcpiphdr pkt; | |
| 96 | ip_t *ip = (ip_t *)&pkt; | |
| 97 | struct protoent *p = NULL; | |
| 98 | char src[16], dst[16], sprt[16], dprt[16]; | |
| 99 | char lbuf[128], len[8], prot[8], time[8], *s; | |
| 100 | int slen, extra = 0, i; | |
| 101 | ||
| 102 | if (!fgets(lbuf, sizeof(lbuf) - 1, efp)) | |
| 103 | return 0; | |
| 104 | ||
| 105 | if ((s = strchr(lbuf, '\n'))) | |
| 106 | *s = '\0'; | |
| 107 | lbuf[sizeof(lbuf)-1] = '\0'; | |
| 108 | ||
| 109 | bzero(&pkt, sizeof(pkt)); | |
| 110 | ||
| 91865926 | 111 | if (sscanf(lbuf, "%7s %7s %15s %15s %15s %15s", len, prot, src, dst, |
| 984263bc | 112 | sprt, dprt) != 6) |
| 91865926 | 113 | if (sscanf(lbuf, "%7s %7s %7s %15s %15s %15s %15s", time, |
| 984263bc MD |
114 | len, prot, src, dst, sprt, dprt) != 7) |
| 115 | return -1; | |
| 116 | ||
| 117 | ip->ip_p = atoi(prot); | |
| 118 | if (ip->ip_p == 0) { | |
| 119 | if (!(p = getprotobyname(prot))) | |
| 120 | return -1; | |
| 121 | ip->ip_p = p->p_proto; | |
| 122 | } | |
| 123 | ||
| 124 | switch (ip->ip_p) { | |
| 125 | case IPPROTO_TCP : | |
| 126 | case IPPROTO_UDP : | |
| 127 | s = strtok(NULL, " :"); | |
| 128 | ip->ip_len += atoi(s); | |
| 129 | if (p->p_proto == IPPROTO_TCP) | |
| 130 | extra = sizeof(struct tcphdr); | |
| 131 | else if (p->p_proto == IPPROTO_UDP) | |
| 132 | extra = sizeof(struct udphdr); | |
| 133 | break; | |
| 134 | #ifdef IGMP | |
| 135 | case IPPROTO_IGMP : | |
| 136 | extra = sizeof(struct igmp); | |
| 137 | break; | |
| 138 | #endif | |
| 139 | case IPPROTO_ICMP : | |
| 140 | extra = sizeof(struct icmp); | |
| 141 | break; | |
| 142 | default : | |
| 143 | break; | |
| 144 | } | |
| 145 | ||
| 146 | (void) inet_aton(src, &ip->ip_src); | |
| 147 | (void) inet_aton(dst, &ip->ip_dst); | |
| 148 | ip->ip_len = atoi(len); | |
| 424e8382 | 149 | ip->ip_hl = (unsigned)sizeof(ip_t); |
| 984263bc MD |
150 | |
| 151 | slen = ip->ip_hl + extra; | |
| 152 | i = MIN(cnt, slen); | |
| 153 | bcopy((char *)&pkt, buf, i); | |
| 154 | return i; | |
| 155 | } |