176 lines
4.3 KiB
C
176 lines
4.3 KiB
C
/* $NetBSD: print-ppp.c,v 1.4 1997/10/03 19:55:36 christos Exp $ */
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/*
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* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static const char rcsid[] =
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"@(#) Header: print-ppp.c,v 1.26 97/06/12 14:21:29 leres Exp (LBL)";
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#else
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__RCSID("$NetBSD: print-ppp.c,v 1.4 1997/10/03 19:55:36 christos Exp $");
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#endif
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#if __STDC__
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struct mbuf;
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struct rtentry;
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#endif
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <pcap.h>
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#include <stdio.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "ppp.h"
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/* XXX This goes somewhere else. */
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#define PPP_HDRLEN 4
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/* Standard PPP printer */
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void
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ppp_if_print(u_char *user, const struct pcap_pkthdr *h,
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register const u_char *p)
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{
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register u_int length = h->len;
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register u_int caplen = h->caplen;
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const struct ip *ip;
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ts_print(&h->ts);
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if (caplen < PPP_HDRLEN) {
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printf("[|ppp]");
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goto out;
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}
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/*
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* Some printers want to get back at the link level addresses,
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* and/or check that they're not walking off the end of the packet.
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* Rather than pass them all the way down, we set these globals.
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*/
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packetp = p;
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snapend = p + caplen;
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if (eflag)
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printf("%c %4d %02x %04x: ", p[0] ? 'O' : 'I', length,
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p[1], ntohs(*(u_short *)&p[2]));
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length -= PPP_HDRLEN;
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ip = (struct ip *)(p + PPP_HDRLEN);
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ip_print((const u_char *)ip, length);
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if (xflag)
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default_print((const u_char *)ip, caplen - PPP_HDRLEN);
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out:
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putchar('\n');
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}
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/* proto type to string mapping */
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static struct tok ptype2str[] = {
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{ PPP_VJC, "VJC" },
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{ PPP_VJNC, "VJNC" },
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{ PPP_OSI, "OSI" },
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{ PPP_LCP, "LCP" },
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{ PPP_IPCP, "IPCP" },
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{ 0, NULL }
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};
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#define PPP_BSDI_HDRLEN 24
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/* BSD/OS specific PPP printer */
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void
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ppp_bsdos_if_print(u_char *user, const struct pcap_pkthdr *h,
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register const u_char *p)
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{
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register u_int length = h->len;
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register u_int caplen = h->caplen;
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register int hdrlength;
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u_short ptype;
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ts_print(&h->ts);
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if (caplen < PPP_BSDI_HDRLEN) {
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printf("[|ppp]");
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goto out;
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}
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/*
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* Some printers want to get back at the link level addresses,
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* and/or check that they're not walking off the end of the packet.
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* Rather than pass them all the way down, we set these globals.
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*/
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packetp = p;
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snapend = p + caplen;
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hdrlength = 0;
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if (p[0] == PPP_ADDRESS && p[1] == PPP_CONTROL) {
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if (eflag)
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printf("%02x %02x ", p[0], p[1]);
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p += 2;
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hdrlength = 2;
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}
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if (eflag)
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printf("%d ", length);
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/* Retrieve the protocol type */
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if (*p & 01) {
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/* Compressed protocol field */
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ptype = *p;
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if (eflag)
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printf("%02x ", ptype);
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p++;
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hdrlength += 1;
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} else {
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/* Un-compressed protocol field */
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ptype = ntohs(*(u_short *)p);
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if (eflag)
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printf("%04x ", ptype);
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p += 2;
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hdrlength += 2;
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}
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length -= hdrlength;
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if (ptype == PPP_IP)
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ip_print(p, length);
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else
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printf("%s ", tok2str(ptype2str, "proto-#%d", ptype));
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if (xflag)
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default_print((const u_char *)p, caplen - hdrlength);
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out:
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putchar('\n');
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}
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