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/* maybe it should be merged into print-ppp.c */
/*
* Copyright (c) 1990, 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-chdlc.c,v 1.2 1999/11/21 09:36:49 fenner 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 <ctype.h>
#include <netdb.h>
#include <pcap.h>
#include <stdio.h>
#ifdef __bsdi__
#include <net/slcompress.h>
#include <net/if_ppp.h>
#endif
#include "interface.h"
#include "addrtoname.h"
#include "ppp.h"
/* XXX This goes somewhere else. */
#define CHDLC_HDRLEN 4
#define CHDLC_UNICAST 0x0f
#define CHDLC_BCAST 0x8f
#define CHDLC_TYPE_SLARP 0x8035
#define CHDLC_TYPE_CDP 0x2000
static void chdlc_slarp_print(const u_char *, u_int);
/* Standard CHDLC printer */
void
chdlc_if_print(u_char *user, const struct pcap_pkthdr *h,
register const u_char *p)
{
register u_int length = h->len;
register u_int caplen = h->caplen;
const struct ip *ip;
u_int proto;
ts_print(&h->ts);
if (caplen < CHDLC_HDRLEN) {
printf("[|chdlc]");
goto out;
}
/*
* 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.
*/
proto = ntohs(*(u_short *)&p[2]);
packetp = p;
snapend = p + caplen;
if (eflag) {
switch (p[0]) {
case CHDLC_UNICAST:
printf("unicast ");
break;
case CHDLC_BCAST:
printf("bcast ");
break;
default:
printf("0x%02x ", p[0]);
break;
}
printf("%d %04x: ", length, proto);
}
length -= CHDLC_HDRLEN;
ip = (struct ip *)(p + CHDLC_HDRLEN);
switch(proto) {
case ETHERTYPE_IP:
ip_print((const u_char *)ip, length);
break;
#ifdef INET6
case ETHERTYPE_IPV6:
ip6_print((const u_char *)ip, length);
break;
#endif
case CHDLC_TYPE_SLARP:
chdlc_slarp_print((const u_char *)ip, length);
break;
#if 0
case CHDLC_TYPE_CDP:
chdlc_cdp_print((const u_char *)ip, length);
break;
#endif
}
if (xflag)
default_print((const u_char *)ip, caplen - CHDLC_HDRLEN);
out:
putchar('\n');
}
struct cisco_slarp {
long code;
#define SLARP_REQUEST 0
#define SLARP_REPLY 1
#define SLARP_KEEPALIVE 2
union {
struct {
struct in_addr addr;
struct in_addr mask;
u_short unused[3];
} addr;
struct {
long myseq;
long yourseq;
short rel;
short t1;
short t2;
} keep;
} un;
};
#define SLARP_LEN 18
static void
chdlc_slarp_print(const u_char *cp, u_int length)
{
struct cisco_slarp *slarp;
if (length < SLARP_LEN) {
printf("[|slarp]");
return;
}
slarp = (struct cisco_slarp *)cp;
switch (ntohl(slarp->code)) {
case SLARP_REQUEST:
printf("slarp-request");
break;
case SLARP_REPLY:
printf("slarp-reply %s/%s",
ipaddr_string(&slarp->un.addr.addr),
ipaddr_string(&slarp->un.addr.mask));
break;
case SLARP_KEEPALIVE:
printf("slarp-keepalive my=0x%x your=0x%x ",
(u_int32_t)ntohl(slarp->un.keep.myseq),
(u_int32_t)ntohl(slarp->un.keep.yourseq));
printf("reliability=0x%04x t1=%d.%d",
ntohs(slarp->un.keep.rel), ntohs(slarp->un.keep.t1),
ntohs(slarp->un.keep.t2));
break;
default:
printf("slarp-0x%x unknown", (u_int32_t)ntohl(slarp->code));
break;
}
if (SLARP_LEN < length && vflag)
printf("(trailing junk: %d bytes)", length - SLARP_LEN);
}
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