diff options
Diffstat (limited to 'usr.sbin/tcpdump/print-null.c')
| -rw-r--r-- | usr.sbin/tcpdump/print-null.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/usr.sbin/tcpdump/print-null.c b/usr.sbin/tcpdump/print-null.c new file mode 100644 index 00000000000..69a34566897 --- /dev/null +++ b/usr.sbin/tcpdump/print-null.c @@ -0,0 +1,113 @@ +/* $NetBSD: print-null.c,v 1.3 1995/03/06 19:11:24 mycroft Exp $ */ + +/* + * Copyright (c) 1991, 1993, 1994 + * 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 char rcsid[] = + "@(#)Header: print-null.c,v 1.14 94/06/10 17:01:35 mccanne Exp (LBL)"; +#endif + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/socket.h> +#include <sys/file.h> +#include <sys/ioctl.h> + +#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 <netinet/tcpip.h> + + +#include <stdio.h> + +#include "interface.h" +#include "addrtoname.h" +#include "pcap.h" + +#define NULL_HDRLEN 4 + +static void +null_print(const u_char *p, const struct ip *ip, int length) +{ + u_int family; + + bcopy(p, &family, sizeof(family)); + + if (nflag) { + /* XXX just dump the header */ + return; + } + switch (family) { + + case AF_INET: + printf("ip: "); + break; + + 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) +{ + int length = h->len; + 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); + + ip_print((const u_char *)ip, length); + + if (xflag) + default_print((const u_char *)ip, caplen - NULL_HDRLEN); + putchar('\n'); +} + |