diff options
Diffstat (limited to 'contrib/ipfilter/ipft_ef.c')
| -rw-r--r-- | contrib/ipfilter/ipft_ef.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/contrib/ipfilter/ipft_ef.c b/contrib/ipfilter/ipft_ef.c new file mode 100644 index 000000000000..2c4cc0f0d21b --- /dev/null +++ b/contrib/ipfilter/ipft_ef.c @@ -0,0 +1,148 @@ +/* + * (C)opyright 1993,1994,1995 by Darren Reed. + * + * Redistribution and use in source and binary forms are permitted + * provided that this notice is preserved and due credit is given + * to the original author and the contributors. + */ + +/* + icmp type + lnth proto source destination src port dst port + +etherfind -n + + 60 tcp 128.250.20.20 128.250.133.13 2419 telnet + +etherfind -n -t + + 0.32 91 04 131.170.1.10 128.250.133.13 + 0.33 566 udp 128.250.37.155 128.250.133.3 901 901 +*/ +#include <stdio.h> +#include <string.h> +#if !defined(__SVR4) && !defined(__GNUC__) +#include <strings.h> +#endif +#include <sys/types.h> +#include <stdlib.h> +#include <unistd.h> +#include <stddef.h> +#include <sys/socket.h> +#include <sys/ioctl.h> +#include <sys/param.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netinet/in_systm.h> +#include <netinet/ip_var.h> +#include <netinet/ip.h> +#include <netinet/tcp.h> +#include <netinet/udp.h> +#include <netinet/ip_icmp.h> +#include <netinet/tcpip.h> +#include <net/if.h> +#include <netdb.h> +#include "ipf.h" +#include "ipt.h" + +#if !defined(lint) && defined(LIBC_SCCS) +static char sccsid[] = "@(#)ipft_ef.c 1.6 2/4/96 (C)1995 Darren Reed"; +static char rcsid[] = "$Id: ipft_ef.c,v 2.0.1.1 1997/01/09 15:14:43 darrenr Exp $"; +#endif + +static int etherf_open(), etherf_close(), etherf_readip(); + +struct ipread etherf = { etherf_open, etherf_close, etherf_readip }; + +static FILE *efp = NULL; +static int efd = -1; + + +static int etherf_open(fname) +char *fname; +{ + if (efd != -1) + return efd; + + if (!strcmp(fname, "-")) { + efd = 0; + efp = stdin; + } else { + efd = open(fname, O_RDONLY); + efp = fdopen(efd, "r"); + } + return efd; +} + + +static int etherf_close() +{ + return close(efd); +} + + +static int etherf_readip(buf, cnt, ifn, dir) +char *buf, **ifn; +int cnt, *dir; +{ + struct tcpiphdr pkt; + struct ip *ip = (struct ip *)&pkt; + struct protoent *p = NULL; + char src[16], dst[16], sprt[16], dprt[16]; + char lbuf[128], len[8], prot[8], time[8], *s; + int slen, extra = 0, i, n; + + if (!fgets(lbuf, sizeof(lbuf) - 1, efp)) + return 0; + + if ((s = strchr(lbuf, '\n'))) + *s = '\0'; + lbuf[sizeof(lbuf)-1] = '\0'; + + bzero(&pkt, sizeof(pkt)); + + if ((n = sscanf(lbuf, "%s %s %s %s %s %s", len, prot, src, dst, + sprt, dprt)) != 6) + if ((n = sscanf(lbuf, "%s %s %s %s %s %s %s", time, + len, prot, src, dst, sprt, dprt)) != 7) + return -1; + + ip->ip_p = atoi(prot); + if (ip->ip_p == 0) { + if (!(p = getprotobyname(prot))) + return -1; + ip->ip_p = p->p_proto; + } + + switch (ip->ip_p) { + case IPPROTO_TCP : + case IPPROTO_UDP : + s = strtok(NULL, " :"); + ip->ip_len += atoi(s); + if (p->p_proto == IPPROTO_TCP) + extra = sizeof(struct tcphdr); + else if (p->p_proto == IPPROTO_UDP) + extra = sizeof(struct udphdr); + break; +#ifdef IGMP + case IPPROTO_IGMP : + extra = sizeof(struct igmp); + break; +#endif + case IPPROTO_ICMP : + extra = sizeof(struct icmp); + break; + default : + break; + } + + (void) inet_aton(src, &ip->ip_src); + (void) inet_aton(dst, &ip->ip_dst); + ip->ip_len = atoi(len); + ip->ip_hl = sizeof(struct ip); + + slen = ip->ip_hl + extra; + i = MIN(cnt, slen); + bcopy((char *)&pkt, buf, i); + return i; +} |