mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-11-30 21:44:49 +08:00
4bec97f457
tcpdump.c. Have if_print routines return the length of the link-layer header, so that the common code knows how to skip the link-layer header when printing the packet in hex/ASCII.
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 1991, 1992, 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-ipfc.c,v 1.4 2002-12-19 09:39:13 guy Exp $ (LBL)";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <pcap.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "ethertype.h"
|
|
|
|
#include "ether.h"
|
|
#include "ipfc.h"
|
|
|
|
/*
|
|
* RFC 2625 IP-over-Fibre Channel.
|
|
*/
|
|
|
|
/* Extract src, dst addresses */
|
|
static inline void
|
|
extract_ipfc_addrs(const struct ipfc_header *ipfcp, char *ipfcsrc,
|
|
char *ipfcdst)
|
|
{
|
|
/*
|
|
* We assume that, as per RFC 2625, the lower 48 bits of the
|
|
* source and destination addresses are MAC addresses.
|
|
*/
|
|
memcpy(ipfcdst, (const char *)&ipfcp->ipfc_dhost[2], 6);
|
|
memcpy(ipfcsrc, (const char *)&ipfcp->ipfc_shost[2], 6);
|
|
}
|
|
|
|
/*
|
|
* Print the Network_Header
|
|
*/
|
|
static inline void
|
|
ipfc_hdr_print(register const struct ipfc_header *ipfcp _U_,
|
|
register u_int length, register const u_char *ipfcsrc,
|
|
register const u_char *ipfcdst)
|
|
{
|
|
const char *srcname, *dstname;
|
|
|
|
srcname = etheraddr_string(ipfcsrc);
|
|
dstname = etheraddr_string(ipfcdst);
|
|
|
|
/*
|
|
* XXX - show the upper 16 bits? Do so only if "vflag" is set?
|
|
*/
|
|
(void) printf("%s %s %d: ", srcname, dstname, length);
|
|
}
|
|
|
|
static void
|
|
ipfc_print(const u_char *p, u_int length, u_int caplen)
|
|
{
|
|
const struct ipfc_header *ipfcp = (const struct ipfc_header *)p;
|
|
struct ether_header ehdr;
|
|
u_short extracted_ethertype;
|
|
|
|
if (caplen < IPFC_HDRLEN) {
|
|
printf("[|ipfc]");
|
|
return;
|
|
}
|
|
/*
|
|
* Get the network addresses into a canonical form
|
|
*/
|
|
extract_ipfc_addrs(ipfcp, (char *)ESRC(&ehdr), (char *)EDST(&ehdr));
|
|
|
|
if (eflag)
|
|
ipfc_hdr_print(ipfcp, length, ESRC(&ehdr), EDST(&ehdr));
|
|
|
|
/* Skip over Network_Header */
|
|
length -= IPFC_HDRLEN;
|
|
p += IPFC_HDRLEN;
|
|
caplen -= IPFC_HDRLEN;
|
|
|
|
/* Frame Control field determines interpretation of packet */
|
|
extracted_ethertype = 0;
|
|
/* Try to print the LLC-layer header & higher layers */
|
|
if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
|
|
&extracted_ethertype) == 0) {
|
|
/*
|
|
* Some kinds of LLC packet we cannot
|
|
* handle intelligently
|
|
*/
|
|
if (!eflag)
|
|
ipfc_hdr_print(ipfcp, length + IPFC_HDRLEN,
|
|
ESRC(&ehdr), EDST(&ehdr));
|
|
if (extracted_ethertype) {
|
|
printf("(LLC %s) ",
|
|
etherproto_string(htons(extracted_ethertype)));
|
|
}
|
|
if (!xflag && !qflag)
|
|
default_print(p, caplen);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is the top level routine of the printer. 'p' points
|
|
* to the Network_Header of the packet, 'h->ts' is the timestamp,
|
|
* 'h->length' is the length of the packet off the wire, and 'h->caplen'
|
|
* is the number of bytes actually captured.
|
|
*/
|
|
u_int
|
|
ipfc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
|
|
{
|
|
ipfc_print(p, h->len, h->caplen);
|
|
|
|
return (IPFC_HDRLEN);
|
|
}
|