mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
f4d0c64a1d
Approved by: re (scottl)
199 lines
5.0 KiB
C
199 lines
5.0 KiB
C
/*
|
|
* Copyright (c) 1988, 1989, 1990, 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[] _U_ =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/print-sll.c,v 1.16.2.1 2005/04/26 00:16:43 guy Exp $ (LBL)";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <pcap.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "ethertype.h"
|
|
#include "extract.h"
|
|
|
|
#include "ether.h"
|
|
#include "sll.h"
|
|
|
|
const struct tok sll_pkttype_values[] = {
|
|
{ LINUX_SLL_HOST, "In" },
|
|
{ LINUX_SLL_BROADCAST, "B" },
|
|
{ LINUX_SLL_MULTICAST, "M" },
|
|
{ LINUX_SLL_OTHERHOST, "P" },
|
|
{ LINUX_SLL_OUTGOING, "Out" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
static inline void
|
|
sll_print(register const struct sll_header *sllp, u_int length)
|
|
{
|
|
u_short ether_type;
|
|
|
|
printf("%3s ",tok2str(sll_pkttype_values,"?",EXTRACT_16BITS(&sllp->sll_pkttype)));
|
|
|
|
/*
|
|
* XXX - check the link-layer address type value?
|
|
* For now, we just assume 6 means Ethernet.
|
|
* XXX - print others as strings of hex?
|
|
*/
|
|
if (EXTRACT_16BITS(&sllp->sll_halen) == 6)
|
|
(void)printf("%s ", etheraddr_string(sllp->sll_addr));
|
|
|
|
if (!qflag) {
|
|
ether_type = EXTRACT_16BITS(&sllp->sll_protocol);
|
|
|
|
if (ether_type <= ETHERMTU) {
|
|
/*
|
|
* Not an Ethernet type; what type is it?
|
|
*/
|
|
switch (ether_type) {
|
|
|
|
case LINUX_SLL_P_802_3:
|
|
/*
|
|
* Ethernet_802.3 IPX frame.
|
|
*/
|
|
(void)printf("802.3");
|
|
break;
|
|
|
|
case LINUX_SLL_P_802_2:
|
|
/*
|
|
* 802.2.
|
|
*/
|
|
(void)printf("802.3");
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* What is it?
|
|
*/
|
|
(void)printf("ethertype Unknown (0x%04x)",
|
|
ether_type);
|
|
break;
|
|
}
|
|
} else {
|
|
(void)printf("ethertype %s (0x%04x)",
|
|
tok2str(ethertype_values, "Unknown", ether_type),
|
|
ether_type);
|
|
}
|
|
(void)printf(", length %u: ", length);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is the top level routine of the printer. 'p' points to the
|
|
* Linux "cooked capture" header of the packet, 'h->ts' is the timestamp,
|
|
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
|
|
* is the number of bytes actually captured.
|
|
*/
|
|
u_int
|
|
sll_if_print(const struct pcap_pkthdr *h, const u_char *p)
|
|
{
|
|
u_int caplen = h->caplen;
|
|
u_int length = h->len;
|
|
register const struct sll_header *sllp;
|
|
u_short ether_type;
|
|
u_short extracted_ethertype;
|
|
|
|
if (caplen < SLL_HDR_LEN) {
|
|
/*
|
|
* XXX - this "can't happen" because "pcap-linux.c" always
|
|
* adds this many bytes of header to every packet in a
|
|
* cooked socket capture.
|
|
*/
|
|
printf("[|sll]");
|
|
return (caplen);
|
|
}
|
|
|
|
sllp = (const struct sll_header *)p;
|
|
|
|
if (eflag)
|
|
sll_print(sllp, length);
|
|
|
|
/*
|
|
* Go past the cooked-mode header.
|
|
*/
|
|
length -= SLL_HDR_LEN;
|
|
caplen -= SLL_HDR_LEN;
|
|
p += SLL_HDR_LEN;
|
|
|
|
ether_type = ntohs(sllp->sll_protocol);
|
|
|
|
/*
|
|
* Is it (gag) an 802.3 encapsulation, or some non-Ethernet
|
|
* packet type?
|
|
*/
|
|
extracted_ethertype = 0;
|
|
if (ether_type <= ETHERMTU) {
|
|
/*
|
|
* Yes - what type is it?
|
|
*/
|
|
switch (ether_type) {
|
|
|
|
case LINUX_SLL_P_802_3:
|
|
/*
|
|
* Ethernet_802.3 IPX frame.
|
|
*/
|
|
ipx_print(p, length);
|
|
break;
|
|
|
|
case LINUX_SLL_P_802_2:
|
|
/*
|
|
* 802.2.
|
|
* Try to print the LLC-layer header & higher layers.
|
|
*/
|
|
if (llc_print(p, length, caplen, NULL, NULL,
|
|
&extracted_ethertype) == 0)
|
|
goto unknown; /* unknown LLC type */
|
|
break;
|
|
|
|
default:
|
|
unknown:
|
|
/* ether_type not known, print raw packet */
|
|
if (!eflag)
|
|
sll_print(sllp, length + SLL_HDR_LEN);
|
|
if (extracted_ethertype) {
|
|
printf("(LLC %s) ",
|
|
etherproto_string(htons(extracted_ethertype)));
|
|
}
|
|
if (!xflag && !qflag)
|
|
default_print(p, caplen);
|
|
break;
|
|
}
|
|
} else if (ether_encap_print(ether_type, p, length, caplen,
|
|
&extracted_ethertype) == 0) {
|
|
/* ether_type not known, print raw packet */
|
|
if (!eflag)
|
|
sll_print(sllp, length + SLL_HDR_LEN);
|
|
if (!xflag && !qflag)
|
|
default_print(p, caplen);
|
|
}
|
|
|
|
return (SLL_HDR_LEN);
|
|
}
|