| /* |
| * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that: (1) source code distributions |
| * retain the above copyright notice and this paragraph in its entirety, (2) |
| * distributions including binary code include the above copyright notice and |
| * this paragraph in its entirety in the documentation or other materials |
| * provided with the distribution, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| * the University nor the names of its contributors may be used to endorse |
| * or promote products derived from this software without specific prior |
| * written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| #ifndef lint |
| static const char rcsid[] = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-null.c,v 1.30 1999-12-22 06:27:21 itojun Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <sys/param.h> |
| #include <sys/time.h> |
| #include <sys/socket.h> |
| #include <sys/file.h> |
| #include <sys/ioctl.h> |
| |
| #if __STDC__ |
| struct mbuf; |
| struct rtentry; |
| #endif |
| #include <net/if.h> |
| |
| #include <netinet/in.h> |
| #include <netinet/in_systm.h> |
| #include <netinet/ip.h> |
| #include <netinet/if_ether.h> |
| #include <netinet/ip_var.h> |
| #include <netinet/udp.h> |
| #include <netinet/udp_var.h> |
| #include <netinet/tcp.h> |
| |
| #include <pcap.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #ifdef INET6 |
| #include <netinet/ip6.h> |
| #endif |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| |
| #ifndef AF_NS |
| #define AF_NS 6 /* XEROX NS protocols */ |
| #endif |
| |
| /* |
| * The DLT_NULL packet header is 4 bytes long. It contains a network |
| * order 32 bit integer that specifies the family, e.g. AF_INET |
| */ |
| #define NULL_HDRLEN 4 |
| |
| static void |
| null_print(const u_char *p, const struct ip *ip, u_int length) |
| { |
| u_int family; |
| |
| memcpy((char *)&family, (char *)p, sizeof(family)); |
| |
| if (nflag) { |
| /* XXX just dump the header */ |
| return; |
| } |
| switch (family) { |
| |
| case AF_INET: |
| printf("ip: "); |
| break; |
| |
| #ifdef INET6 |
| case AF_INET6: |
| printf("ip6: "); |
| break; |
| #endif |
| |
| case AF_NS: |
| printf("ns: "); |
| break; |
| |
| default: |
| printf("AF %d: ", family); |
| break; |
| } |
| } |
| |
| void |
| null_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) |
| { |
| u_int length = h->len; |
| u_int caplen = h->caplen; |
| const struct ip *ip; |
| |
| ts_print(&h->ts); |
| |
| /* |
| * Some printers want to get back at the link level addresses, |
| * and/or check that they're not walking off the end of the packet. |
| * Rather than pass them all the way down, we set these globals. |
| */ |
| packetp = p; |
| snapend = p + caplen; |
| |
| length -= NULL_HDRLEN; |
| |
| ip = (struct ip *)(p + NULL_HDRLEN); |
| |
| if (eflag) |
| null_print(p, ip, length); |
| |
| switch (ip->ip_v) { |
| case 4: |
| ip_print((const u_char *)ip, length); |
| break; |
| #ifdef INET6 |
| case 6: |
| ip6_print((const u_char *)ip, length); |
| break; |
| #endif /* INET6 */ |
| default: |
| printf("ip v%d", ip->ip_v); |
| break; |
| } |
| |
| if (xflag) |
| default_print((const u_char *)ip, caplen - NULL_HDRLEN); |
| putchar('\n'); |
| } |
| |