593 lines
12 KiB
C
593 lines
12 KiB
C
/* $NetBSD: print-pim.c,v 1.5 2000/04/24 13:02:29 itojun Exp $ */
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/*
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* Copyright (c) 1995, 1996
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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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"@(#) KAME Header: /cvsroot/kame/kame/kame/kame/tcpdump/print-pim.c,v 1.4 1999/11/17 14:49:49 jinmei Exp";
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#else
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__RCSID("$NetBSD: print-pim.c,v 1.5 2000/04/24 13:02:29 itojun 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 <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 <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/tcp.h>
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/*
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* XXX: We consider a case where IPv6 is not ready yet for portability,
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* but PIM dependent defintions should be independent of IPv6...
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*/
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#ifdef INET6
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#include <netinet6/pim6.h>
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#else
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struct pim {
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#if defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN)
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u_char pim_type:4, /* the PIM message type, currently they are:
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* Hello, Register, Register-Stop, Join/Prune,
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* Bootstrap, Assert, Graft (PIM-DM only),
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* Graft-Ack (PIM-DM only), C-RP-Adv
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*/
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pim_ver:4; /* PIM version number; 2 for PIMv2 */
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#else
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u_char pim_ver:4, /* PIM version */
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pim_type:4; /* PIM type */
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#endif
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u_char pim_rsv; /* Reserved */
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u_short pim_cksum; /* IP style check sum */
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};
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "interface.h"
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#include "addrtoname.h"
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static void pimv2_print(register const u_char *bp, register u_int len);
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void
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igmp_pim_print(register const u_char *bp, register u_int len)
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{
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register const u_char *ep;
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register u_char type;
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ep = (const u_char *)snapend;
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if (bp >= ep)
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return;
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type = bp[1];
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switch (type) {
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case 0:
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(void)printf(" Query");
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break;
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case 1:
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(void)printf(" Register");
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break;
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case 2:
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(void)printf(" Register-Stop");
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break;
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case 3:
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(void)printf(" Join/Prune");
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break;
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case 4:
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(void)printf(" RP-reachable");
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break;
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case 5:
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(void)printf(" Assert");
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break;
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case 6:
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(void)printf(" Graft");
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break;
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case 7:
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(void)printf(" Graft-ACK");
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break;
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case 8:
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(void)printf(" Mode");
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break;
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default:
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(void)printf(" [type %d]", type);
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break;
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}
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}
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void
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pim_print(register const u_char *bp, register u_int len)
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{
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register const u_char *ep;
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register struct pim *pim = (struct pim *)bp;
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ep = (const u_char *)snapend;
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if (bp >= ep)
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return;
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#ifdef notyet /* currently we see only version and type */
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TCHECK(pim->pim_rsv);
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#endif
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switch (pim->pim_ver) {
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case 2: /* avoid hardcoding? */
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(void)printf("PIMv2");
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pimv2_print(bp, len);
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break;
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default:
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(void)printf("PIMv%d", pim->pim_ver);
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break;
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}
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return;
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}
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enum pimv2_addrtype {
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pimv2_unicast, pimv2_group, pimv2_source
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};
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#if 0
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static char *addrtypestr[] = {
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"unicast", "group", "source"
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};
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#endif
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static int
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pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
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{
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const u_char *ep;
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int af;
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char *afstr;
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int len;
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ep = (const u_char *)snapend;
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if (bp >= ep)
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return -1;
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switch (bp[0]) {
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case 1:
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af = AF_INET;
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afstr = "IPv4";
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break;
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#ifdef INET6
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case 2:
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af = AF_INET6;
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afstr = "IPv6";
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break;
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#endif
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default:
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return -1;
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}
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if (bp[1] != 0)
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return -1;
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switch (at) {
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case pimv2_unicast:
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if (af == AF_INET) {
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len = 4;
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if (bp + 2 + len > ep)
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return -1;
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if (!silent)
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(void)printf("%s", ipaddr_string(bp + 2));
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}
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#ifdef INET6
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else if (af == AF_INET6) {
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len = 16;
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if (bp + 2 + len > ep)
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return -1;
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if (!silent)
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(void)printf("%s", ip6addr_string(bp + 2));
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}
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#endif
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return 2 + len;
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case pimv2_group:
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if (af == AF_INET) {
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len = 4;
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if (bp + 4 + len > ep)
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return -1;
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if (!silent)
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(void)printf("%s/%u", ipaddr_string(bp + 4), bp[3]);
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}
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#ifdef INET6
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else if (af == AF_INET6) {
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len = 16;
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if (bp + 4 + len > ep)
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return -1;
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if (!silent)
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(void)printf("%s/%u", ip6addr_string(bp + 4), bp[3]);
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}
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#endif
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return 4 + len;
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case pimv2_source:
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if (af == AF_INET) {
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len = 4;
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if (bp + 4 + len > ep)
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return -1;
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if (!silent)
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(void)printf("%s/%u", ipaddr_string(bp + 4), bp[3]);
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}
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#ifdef INET6
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else if (af == AF_INET6) {
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len = 16;
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if (bp + 4 + len > ep)
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return -1;
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if (!silent)
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(void)printf("%s/%u", ip6addr_string(bp + 4), bp[3]);
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}
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#endif
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if (vflag && bp[2] && !silent) {
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(void)printf("(%s%s%s)",
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bp[2] & 0x04 ? "S" : "",
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bp[2] & 0x02 ? "W" : "",
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bp[2] & 0x01 ? "R" : "");
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}
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return 4 + len;
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default:
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return -1;
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}
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}
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static void
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pimv2_print(register const u_char *bp, register u_int len)
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{
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register const u_char *ep;
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register struct pim *pim = (struct pim *)bp;
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int advance;
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ep = (const u_char *)snapend;
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if (bp >= ep)
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return;
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#ifdef notyet /* currently we see only version and type */
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TCHECK(pim->pim_rsv);
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#endif
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switch (pim->pim_type) {
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case 0:
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{
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u_int16_t otype, olen;
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(void)printf(" Hello");
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bp += 4;
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while (bp < ep) {
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otype = ntohs(*(u_int16_t *)(bp + 0));
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olen = ntohs(*(u_int16_t *)(bp + 2));
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if (otype == 1 && olen == 2 && bp + 4 + olen <= ep) {
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u_int16_t value;
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(void)printf(" holdtime=");
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value = ntohs(*(u_int16_t *)(bp + 4));
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if (value == 0xffff)
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(void)printf("infty");
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else
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(void)printf("%u", value);
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bp += 4 + olen;
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} else
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break;
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}
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break;
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}
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case 1:
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{
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struct ip *ip;
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(void)printf(" Register");
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if (vflag && bp + 8 <= ep) {
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(void)printf(" %s%s", bp[4] & 0x80 ? "B" : "",
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bp[4] & 0x40 ? "N" : "");
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}
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bp += 8; len -= 8;
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/* encapsulated multicast packet */
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if (bp >= ep)
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break;
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ip = (struct ip *)bp;
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switch (ip->ip_v) {
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case 4: /* IPv4 */
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printf(" ");
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ip_print(bp, len);
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break;
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#ifdef INET6
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case 6: /* IPv6 */
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printf(" ");
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ip6_print(bp, len);
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break;
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#endif
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default:
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(void)printf(" IP ver %d", ip->ip_v);
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break;
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}
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break;
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}
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case 2:
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(void)printf(" Register-Stop");
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bp += 4; len -= 4;
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if (bp >= ep)
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break;
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(void)printf(" group=");
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if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
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(void)printf("...");
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break;
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}
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bp += advance; len -= advance;
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if (bp >= ep)
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break;
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(void)printf(" source=");
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if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
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(void)printf("...");
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break;
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}
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bp += advance; len -= advance;
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break;
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case 3:
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case 6:
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case 7:
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{
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u_int8_t ngroup;
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u_int16_t holdtime;
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u_int16_t njoin;
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u_int16_t nprune;
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int i, j;
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switch (pim->pim_type) {
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case 3:
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(void)printf(" Join/Prune");
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break;
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case 6:
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(void)printf(" Graft");
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break;
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case 7:
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(void)printf(" Graft-ACK");
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break;
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}
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bp += 4; len -= 4;
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if (pim->pim_type != 7) { /*not for Graft-ACK*/
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if (bp >= ep)
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break;
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(void)printf(" upstream-neighbor=");
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if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
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(void)printf("...");
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break;
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}
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bp += advance; len -= advance;
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}
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if (bp + 4 > ep)
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break;
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ngroup = bp[1];
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holdtime = ntohs(*(u_int16_t *)(bp + 2));
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(void)printf(" groups=%u", ngroup);
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if (pim->pim_type != 7) { /*not for Graft-ACK*/
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(void)printf(" holdtime=");
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if (holdtime == 0xffff)
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(void)printf("infty");
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else
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(void)printf("%u", holdtime);
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}
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bp += 4; len -= 4;
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for (i = 0; i < ngroup; i++) {
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if (bp >= ep)
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goto jp_done;
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(void)printf(" (group%d: ", i);
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if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
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(void)printf("...)");
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goto jp_done;
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}
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bp += advance; len -= advance;
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if (bp + 4 > ep) {
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(void)printf("...)");
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goto jp_done;
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}
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njoin = ntohs(*(u_int16_t *)(bp + 0));
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nprune = ntohs(*(u_int16_t *)(bp + 2));
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(void)printf(" join=%u", njoin);
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bp += 4; len -= 4;
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for (j = 0; j < njoin; j++) {
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(void)printf(" ");
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if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
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(void)printf("...)");
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goto jp_done;
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}
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bp += advance; len -= advance;
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}
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(void)printf(" prune=%u", nprune);
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for (j = 0; j < nprune; j++) {
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(void)printf(" ");
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if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
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(void)printf("...)");
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goto jp_done;
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}
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bp += advance; len -= advance;
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}
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(void)printf(")");
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}
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jp_done:
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break;
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}
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case 4:
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{
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int i, j, frpcnt;
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(void)printf(" Bootstrap");
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bp += 4;
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/* Fragment Tag, Hash Mask len, and BSR-priority */
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if (bp + sizeof(u_int16_t) >= ep) break;
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(void)printf(" tag=%x", ntohs(*(u_int16_t *)bp));
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bp += sizeof(u_int16_t);
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if (bp >= ep) break;
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(void)printf(" hashmlen=%d", bp[0]);
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if (bp + 1 >= ep) break;
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(void)printf(" BSRprio=%d", bp[1]);
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bp += 2;
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/* Encoded-Unicast-BSR-Address */
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if (bp >= ep) break;
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(void)printf(" BSR=");
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if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
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(void)printf("...");
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break;
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}
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bp += advance;
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for (i = 0; bp < ep; i++) {
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/* Encoded-Group Address */
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(void)printf(" (group%d: ", i);
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if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
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< 0) {
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(void)printf("...)");
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goto bs_done;
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}
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bp += advance;
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/* RP-Count, Frag RP-Cnt, and rsvd */
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if (bp >= ep) {
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(void)printf("...)");
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goto bs_done;
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}
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(void)printf(" RPcnt=%d", frpcnt = bp[0]);
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if (bp + 1 >= ep) {
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(void)printf("...)");
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goto bs_done;
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}
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(void)printf(" FRPcnt=%d", bp[1]);
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bp += 4;
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for (j = 0; j < frpcnt && bp < ep; j++) {
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/* each RP info */
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(void)printf(" RP%d=", j);
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if ((advance = pimv2_addr_print(bp,
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pimv2_unicast,
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0)) < 0) {
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(void)printf("...)");
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goto bs_done;
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}
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bp += advance;
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if (bp + 1 >= ep) {
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(void)printf("...)");
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goto bs_done;
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}
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(void)printf(",holdtime=%d",
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ntohs(*(u_int16_t *)bp));
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if (bp + 2 >= ep) {
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(void)printf("...)");
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goto bs_done;
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}
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(void)printf(",prio=%d", bp[2]);
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bp += 4;
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}
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(void)printf(")");
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}
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bs_done:
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break;
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}
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case 5:
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(void)printf(" Assert");
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bp += 4; len -= 4;
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if (bp >= ep)
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break;
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(void)printf(" group=");
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if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
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(void)printf("...");
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break;
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}
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bp += advance; len -= advance;
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if (bp >= ep)
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break;
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(void)printf(" src=");
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if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
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(void)printf("...");
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break;
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}
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bp += advance; len -= advance;
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if (bp + 8 > ep)
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break;
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if (ntohl(*(u_int32_t *)bp) & 0x80000000)
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(void)printf(" RPT");
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(void)printf(" pref=%u", ntohl(*(u_int32_t *)bp & 0x7fffffff));
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(void)printf(" metric=%u", ntohl(*(u_int32_t *)(bp + 4)));
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break;
|
|
|
|
case 8:
|
|
{
|
|
int i, pfxcnt;
|
|
|
|
(void)printf(" Candidate-RP-Advertisement");
|
|
bp += 4;
|
|
|
|
/* Prefix-Cnt, Priority, and Holdtime */
|
|
if (bp >= ep) break;
|
|
(void)printf(" prefix-cnt=%d", bp[0]);
|
|
pfxcnt = bp[0];
|
|
if (bp + 1 >= ep) break;
|
|
(void)printf(" prio=%d", bp[1]);
|
|
if (bp + 3 >= ep) break;
|
|
(void)printf(" holdtime=%d", ntohs(*(u_int16_t *)(bp + 2)));
|
|
bp += 4;
|
|
|
|
/* Encoded-Unicast-RP-Address */
|
|
if (bp >= ep) break;
|
|
(void)printf(" RP=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance;
|
|
|
|
/* Encoded-Group Addresses */
|
|
for (i = 0; i < pfxcnt && bp < ep; i++) {
|
|
(void)printf(" Group%d=", i);
|
|
if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
|
|
< 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance;
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
(void)printf(" [type %d]", pim->pim_type);
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|