1096 lines
30 KiB
C
1096 lines
30 KiB
C
/*
|
|
* Copyright (c) 1995, 1996
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] _U_ =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/print-pim.c,v 1.49 2006-02-13 01:31:35 hannes Exp $ (LBL)";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h"
|
|
|
|
#include "ip.h"
|
|
|
|
#define PIMV2_TYPE_HELLO 0
|
|
#define PIMV2_TYPE_REGISTER 1
|
|
#define PIMV2_TYPE_REGISTER_STOP 2
|
|
#define PIMV2_TYPE_JOIN_PRUNE 3
|
|
#define PIMV2_TYPE_BOOTSTRAP 4
|
|
#define PIMV2_TYPE_ASSERT 5
|
|
#define PIMV2_TYPE_GRAFT 6
|
|
#define PIMV2_TYPE_GRAFT_ACK 7
|
|
#define PIMV2_TYPE_CANDIDATE_RP 8
|
|
#define PIMV2_TYPE_PRUNE_REFRESH 9
|
|
|
|
static struct tok pimv2_type_values[] = {
|
|
{ PIMV2_TYPE_HELLO, "Hello" },
|
|
{ PIMV2_TYPE_REGISTER, "Register" },
|
|
{ PIMV2_TYPE_REGISTER_STOP, "Register Stop" },
|
|
{ PIMV2_TYPE_JOIN_PRUNE, "Join / Prune" },
|
|
{ PIMV2_TYPE_BOOTSTRAP, "Bootstrap" },
|
|
{ PIMV2_TYPE_ASSERT, "Assert" },
|
|
{ PIMV2_TYPE_GRAFT, "Graft" },
|
|
{ PIMV2_TYPE_GRAFT_ACK, "Graft Acknowledgement" },
|
|
{ PIMV2_TYPE_CANDIDATE_RP, "Candidate RP Advertisement" },
|
|
{ PIMV2_TYPE_PRUNE_REFRESH, "Prune Refresh" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define PIMV2_HELLO_OPTION_HOLDTIME 1
|
|
#define PIMV2_HELLO_OPTION_LANPRUNEDELAY 2
|
|
#define PIMV2_HELLO_OPTION_DR_PRIORITY_OLD 18
|
|
#define PIMV2_HELLO_OPTION_DR_PRIORITY 19
|
|
#define PIMV2_HELLO_OPTION_GENID 20
|
|
#define PIMV2_HELLO_OPTION_REFRESH_CAP 21
|
|
#define PIMV2_HELLO_OPTION_BIDIR_CAP 22
|
|
#define PIMV2_HELLO_OPTION_ADDRESS_LIST 24
|
|
#define PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD 65001
|
|
|
|
static struct tok pimv2_hello_option_values[] = {
|
|
{ PIMV2_HELLO_OPTION_HOLDTIME, "Hold Time" },
|
|
{ PIMV2_HELLO_OPTION_LANPRUNEDELAY, "LAN Prune Delay" },
|
|
{ PIMV2_HELLO_OPTION_DR_PRIORITY_OLD, "DR Priority (Old)" },
|
|
{ PIMV2_HELLO_OPTION_DR_PRIORITY, "DR Priority" },
|
|
{ PIMV2_HELLO_OPTION_GENID, "Generation ID" },
|
|
{ PIMV2_HELLO_OPTION_REFRESH_CAP, "State Refresh Capability" },
|
|
{ PIMV2_HELLO_OPTION_BIDIR_CAP, "Bi-Directional Capability" },
|
|
{ PIMV2_HELLO_OPTION_ADDRESS_LIST, "Address List" },
|
|
{ PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD, "Address List (Old)" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define PIMV2_REGISTER_FLAG_LEN 4
|
|
#define PIMV2_REGISTER_FLAG_BORDER 0x80000000
|
|
#define PIMV2_REGISTER_FLAG_NULL 0x40000000
|
|
|
|
static struct tok pimv2_register_flag_values[] = {
|
|
{ PIMV2_REGISTER_FLAG_BORDER, "Border" },
|
|
{ PIMV2_REGISTER_FLAG_NULL, "Null" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
/*
|
|
* XXX: We consider a case where IPv6 is not ready yet for portability,
|
|
* but PIM dependent defintions should be independent of IPv6...
|
|
*/
|
|
|
|
struct pim {
|
|
u_int8_t pim_typever;
|
|
/* upper 4bit: PIM version number; 2 for PIMv2 */
|
|
/* lower 4bit: the PIM message type, currently they are:
|
|
* Hello, Register, Register-Stop, Join/Prune,
|
|
* Bootstrap, Assert, Graft (PIM-DM only),
|
|
* Graft-Ack (PIM-DM only), C-RP-Adv
|
|
*/
|
|
#define PIM_VER(x) (((x) & 0xf0) >> 4)
|
|
#define PIM_TYPE(x) ((x) & 0x0f)
|
|
u_char pim_rsv; /* Reserved */
|
|
u_short pim_cksum; /* IP style check sum */
|
|
};
|
|
|
|
static void pimv2_print(register const u_char *bp, register u_int len, u_int cksum);
|
|
|
|
static void
|
|
pimv1_join_prune_print(register const u_char *bp, register u_int len)
|
|
{
|
|
int maddrlen, addrlen, ngroups, njoin, nprune;
|
|
int njp;
|
|
|
|
/* If it's a single group and a single source, use 1-line output. */
|
|
if (TTEST2(bp[0], 30) && bp[11] == 1 &&
|
|
((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
|
|
int hold;
|
|
|
|
(void)printf(" RPF %s ", ipaddr_string(bp));
|
|
hold = EXTRACT_16BITS(&bp[6]);
|
|
if (hold != 180) {
|
|
(void)printf("Hold ");
|
|
relts_print(hold);
|
|
}
|
|
(void)printf("%s (%s/%d, %s", njoin ? "Join" : "Prune",
|
|
ipaddr_string(&bp[26]), bp[25] & 0x3f,
|
|
ipaddr_string(&bp[12]));
|
|
if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
|
|
(void)printf("/%s", ipaddr_string(&bp[16]));
|
|
(void)printf(") %s%s %s",
|
|
(bp[24] & 0x01) ? "Sparse" : "Dense",
|
|
(bp[25] & 0x80) ? " WC" : "",
|
|
(bp[25] & 0x40) ? "RP" : "SPT");
|
|
return;
|
|
}
|
|
|
|
TCHECK2(bp[0], sizeof(struct in_addr));
|
|
if (vflag > 1)
|
|
(void)printf("\n");
|
|
(void)printf(" Upstream Nbr: %s", ipaddr_string(bp));
|
|
TCHECK2(bp[6], 2);
|
|
if (vflag > 1)
|
|
(void)printf("\n");
|
|
(void)printf(" Hold time: ");
|
|
relts_print(EXTRACT_16BITS(&bp[6]));
|
|
if (vflag < 2)
|
|
return;
|
|
bp += 8;
|
|
len -= 8;
|
|
|
|
TCHECK2(bp[0], 4);
|
|
maddrlen = bp[1];
|
|
addrlen = bp[2];
|
|
ngroups = bp[3];
|
|
bp += 4;
|
|
len -= 4;
|
|
while (ngroups--) {
|
|
/*
|
|
* XXX - does the address have length "addrlen" and the
|
|
* mask length "maddrlen"?
|
|
*/
|
|
TCHECK2(bp[0], sizeof(struct in_addr));
|
|
(void)printf("\n\tGroup: %s", ipaddr_string(bp));
|
|
TCHECK2(bp[4], sizeof(struct in_addr));
|
|
if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
|
|
(void)printf("/%s", ipaddr_string(&bp[4]));
|
|
TCHECK2(bp[8], 4);
|
|
njoin = EXTRACT_16BITS(&bp[8]);
|
|
nprune = EXTRACT_16BITS(&bp[10]);
|
|
(void)printf(" joined: %d pruned: %d", njoin, nprune);
|
|
bp += 12;
|
|
len -= 12;
|
|
for (njp = 0; njp < (njoin + nprune); njp++) {
|
|
const char *type;
|
|
|
|
if (njp < njoin)
|
|
type = "Join ";
|
|
else
|
|
type = "Prune";
|
|
TCHECK2(bp[0], 6);
|
|
(void)printf("\n\t%s %s%s%s%s/%d", type,
|
|
(bp[0] & 0x01) ? "Sparse " : "Dense ",
|
|
(bp[1] & 0x80) ? "WC " : "",
|
|
(bp[1] & 0x40) ? "RP " : "SPT ",
|
|
ipaddr_string(&bp[2]), bp[1] & 0x3f);
|
|
bp += 6;
|
|
len -= 6;
|
|
}
|
|
}
|
|
return;
|
|
trunc:
|
|
(void)printf("[|pim]");
|
|
return;
|
|
}
|
|
|
|
void
|
|
pimv1_print(register const u_char *bp, register u_int len)
|
|
{
|
|
register const u_char *ep;
|
|
register u_char type;
|
|
|
|
ep = (const u_char *)snapend;
|
|
if (bp >= ep)
|
|
return;
|
|
|
|
TCHECK(bp[1]);
|
|
type = bp[1];
|
|
|
|
switch (type) {
|
|
case 0:
|
|
(void)printf(" Query");
|
|
if (TTEST(bp[8])) {
|
|
switch (bp[8] >> 4) {
|
|
case 0:
|
|
(void)printf(" Dense-mode");
|
|
break;
|
|
case 1:
|
|
(void)printf(" Sparse-mode");
|
|
break;
|
|
case 2:
|
|
(void)printf(" Sparse-Dense-mode");
|
|
break;
|
|
default:
|
|
(void)printf(" mode-%d", bp[8] >> 4);
|
|
break;
|
|
}
|
|
}
|
|
if (vflag) {
|
|
TCHECK2(bp[10],2);
|
|
(void)printf(" (Hold-time ");
|
|
relts_print(EXTRACT_16BITS(&bp[10]));
|
|
(void)printf(")");
|
|
}
|
|
break;
|
|
|
|
case 1:
|
|
(void)printf(" Register");
|
|
TCHECK2(bp[8], 20); /* ip header */
|
|
(void)printf(" for %s > %s", ipaddr_string(&bp[20]),
|
|
ipaddr_string(&bp[24]));
|
|
break;
|
|
case 2:
|
|
(void)printf(" Register-Stop");
|
|
TCHECK2(bp[12], sizeof(struct in_addr));
|
|
(void)printf(" for %s > %s", ipaddr_string(&bp[8]),
|
|
ipaddr_string(&bp[12]));
|
|
break;
|
|
case 3:
|
|
(void)printf(" Join/Prune");
|
|
if (vflag)
|
|
pimv1_join_prune_print(&bp[8], len - 8);
|
|
break;
|
|
case 4:
|
|
(void)printf(" RP-reachable");
|
|
if (vflag) {
|
|
TCHECK2(bp[22], 2);
|
|
(void)printf(" group %s",
|
|
ipaddr_string(&bp[8]));
|
|
if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
|
|
(void)printf("/%s", ipaddr_string(&bp[12]));
|
|
(void)printf(" RP %s hold ", ipaddr_string(&bp[16]));
|
|
relts_print(EXTRACT_16BITS(&bp[22]));
|
|
}
|
|
break;
|
|
case 5:
|
|
(void)printf(" Assert");
|
|
TCHECK2(bp[16], sizeof(struct in_addr));
|
|
(void)printf(" for %s > %s", ipaddr_string(&bp[16]),
|
|
ipaddr_string(&bp[8]));
|
|
if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
|
|
(void)printf("/%s", ipaddr_string(&bp[12]));
|
|
TCHECK2(bp[24], 4);
|
|
(void)printf(" %s pref %d metric %d",
|
|
(bp[20] & 0x80) ? "RP-tree" : "SPT",
|
|
EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
|
|
EXTRACT_32BITS(&bp[24]));
|
|
break;
|
|
case 6:
|
|
(void)printf(" Graft");
|
|
if (vflag)
|
|
pimv1_join_prune_print(&bp[8], len - 8);
|
|
break;
|
|
case 7:
|
|
(void)printf(" Graft-ACK");
|
|
if (vflag)
|
|
pimv1_join_prune_print(&bp[8], len - 8);
|
|
break;
|
|
case 8:
|
|
(void)printf(" Mode");
|
|
break;
|
|
default:
|
|
(void)printf(" [type %d]", type);
|
|
break;
|
|
}
|
|
if ((bp[4] >> 4) != 1)
|
|
(void)printf(" [v%d]", bp[4] >> 4);
|
|
return;
|
|
|
|
trunc:
|
|
(void)printf("[|pim]");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* auto-RP is a cisco protocol, documented at
|
|
* ftp://ftpeng.cisco.com/ipmulticast/specs/pim-autorp-spec01.txt
|
|
*
|
|
* This implements version 1+, dated Sept 9, 1998.
|
|
*/
|
|
void
|
|
cisco_autorp_print(register const u_char *bp, register u_int len)
|
|
{
|
|
int type;
|
|
int numrps;
|
|
int hold;
|
|
|
|
TCHECK(bp[0]);
|
|
(void)printf(" auto-rp ");
|
|
type = bp[0];
|
|
switch (type) {
|
|
case 0x11:
|
|
(void)printf("candidate-advert");
|
|
break;
|
|
case 0x12:
|
|
(void)printf("mapping");
|
|
break;
|
|
default:
|
|
(void)printf("type-0x%02x", type);
|
|
break;
|
|
}
|
|
|
|
TCHECK(bp[1]);
|
|
numrps = bp[1];
|
|
|
|
TCHECK2(bp[2], 2);
|
|
(void)printf(" Hold ");
|
|
hold = EXTRACT_16BITS(&bp[2]);
|
|
if (hold)
|
|
relts_print(EXTRACT_16BITS(&bp[2]));
|
|
else
|
|
printf("FOREVER");
|
|
|
|
/* Next 4 bytes are reserved. */
|
|
|
|
bp += 8; len -= 8;
|
|
|
|
/*XXX skip unless -v? */
|
|
|
|
/*
|
|
* Rest of packet:
|
|
* numrps entries of the form:
|
|
* 32 bits: RP
|
|
* 6 bits: reserved
|
|
* 2 bits: PIM version supported, bit 0 is "supports v1", 1 is "v2".
|
|
* 8 bits: # of entries for this RP
|
|
* each entry: 7 bits: reserved, 1 bit: negative,
|
|
* 8 bits: mask 32 bits: source
|
|
* lather, rinse, repeat.
|
|
*/
|
|
while (numrps--) {
|
|
int nentries;
|
|
char s;
|
|
|
|
TCHECK2(bp[0], 4);
|
|
(void)printf(" RP %s", ipaddr_string(bp));
|
|
TCHECK(bp[4]);
|
|
switch (bp[4] & 0x3) {
|
|
case 0: printf(" PIMv?");
|
|
break;
|
|
case 1: printf(" PIMv1");
|
|
break;
|
|
case 2: printf(" PIMv2");
|
|
break;
|
|
case 3: printf(" PIMv1+2");
|
|
break;
|
|
}
|
|
if (bp[4] & 0xfc)
|
|
(void)printf(" [rsvd=0x%02x]", bp[4] & 0xfc);
|
|
TCHECK(bp[5]);
|
|
nentries = bp[5];
|
|
bp += 6; len -= 6;
|
|
s = ' ';
|
|
for (; nentries; nentries--) {
|
|
TCHECK2(bp[0], 6);
|
|
(void)printf("%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
|
|
ipaddr_string(&bp[2]), bp[1]);
|
|
if (bp[0] & 0x02) {
|
|
(void)printf(" bidir");
|
|
}
|
|
if (bp[0] & 0xfc) {
|
|
(void)printf("[rsvd=0x%02x]", bp[0] & 0xfc);
|
|
}
|
|
s = ',';
|
|
bp += 6; len -= 6;
|
|
}
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
(void)printf("[|autorp]");
|
|
return;
|
|
}
|
|
|
|
void
|
|
pim_print(register const u_char *bp, register u_int len, u_int cksum)
|
|
{
|
|
register const u_char *ep;
|
|
register struct pim *pim = (struct pim *)bp;
|
|
|
|
ep = (const u_char *)snapend;
|
|
if (bp >= ep)
|
|
return;
|
|
#ifdef notyet /* currently we see only version and type */
|
|
TCHECK(pim->pim_rsv);
|
|
#endif
|
|
|
|
switch (PIM_VER(pim->pim_typever)) {
|
|
case 2:
|
|
if (!vflag) {
|
|
printf("PIMv%u, %s, length %u",
|
|
PIM_VER(pim->pim_typever),
|
|
tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
|
|
len);
|
|
return;
|
|
} else {
|
|
printf("PIMv%u, length %u\n\t%s",
|
|
PIM_VER(pim->pim_typever),
|
|
len,
|
|
tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)));
|
|
pimv2_print(bp, len, cksum);
|
|
}
|
|
break;
|
|
default:
|
|
printf("PIMv%u, length %u",
|
|
PIM_VER(pim->pim_typever),
|
|
len);
|
|
break;
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* PIMv2 uses encoded address representations.
|
|
*
|
|
* The last PIM-SM I-D before RFC2117 was published specified the
|
|
* following representation for unicast addresses. However, RFC2117
|
|
* specified no encoding for unicast addresses with the unicast
|
|
* address length specified in the header. Therefore, we have to
|
|
* guess which encoding is being used (Cisco's PIMv2 implementation
|
|
* uses the non-RFC encoding). RFC2117 turns a previously "Reserved"
|
|
* field into a 'unicast-address-length-in-bytes' field. We guess
|
|
* that it's the draft encoding if this reserved field is zero.
|
|
*
|
|
* RFC2362 goes back to the encoded format, and calls the addr length
|
|
* field "reserved" again.
|
|
*
|
|
* The first byte is the address family, from:
|
|
*
|
|
* 0 Reserved
|
|
* 1 IP (IP version 4)
|
|
* 2 IP6 (IP version 6)
|
|
* 3 NSAP
|
|
* 4 HDLC (8-bit multidrop)
|
|
* 5 BBN 1822
|
|
* 6 802 (includes all 802 media plus Ethernet "canonical format")
|
|
* 7 E.163
|
|
* 8 E.164 (SMDS, Frame Relay, ATM)
|
|
* 9 F.69 (Telex)
|
|
* 10 X.121 (X.25, Frame Relay)
|
|
* 11 IPX
|
|
* 12 Appletalk
|
|
* 13 Decnet IV
|
|
* 14 Banyan Vines
|
|
* 15 E.164 with NSAP format subaddress
|
|
*
|
|
* In addition, the second byte is an "Encoding". 0 is the default
|
|
* encoding for the address family, and no other encodings are currently
|
|
* specified.
|
|
*
|
|
*/
|
|
|
|
static int pimv2_addr_len;
|
|
|
|
enum pimv2_addrtype {
|
|
pimv2_unicast, pimv2_group, pimv2_source
|
|
};
|
|
|
|
/* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Addr Family | Encoding Type | Unicast Address |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+++++++
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Addr Family | Encoding Type | Reserved | Mask Len |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Group multicast Address |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Addr Family | Encoding Type | Rsrvd |S|W|R| Mask Len |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Source Address |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*/
|
|
static int
|
|
pimv2_addr_print(const u_char *bp, enum pimv2_addrtype at, int silent)
|
|
{
|
|
int af;
|
|
int len, hdrlen;
|
|
|
|
TCHECK(bp[0]);
|
|
|
|
if (pimv2_addr_len == 0) {
|
|
TCHECK(bp[1]);
|
|
switch (bp[0]) {
|
|
case 1:
|
|
af = AF_INET;
|
|
len = sizeof(struct in_addr);
|
|
break;
|
|
#ifdef INET6
|
|
case 2:
|
|
af = AF_INET6;
|
|
len = sizeof(struct in6_addr);
|
|
break;
|
|
#endif
|
|
default:
|
|
return -1;
|
|
}
|
|
if (bp[1] != 0)
|
|
return -1;
|
|
hdrlen = 2;
|
|
} else {
|
|
switch (pimv2_addr_len) {
|
|
case sizeof(struct in_addr):
|
|
af = AF_INET;
|
|
break;
|
|
#ifdef INET6
|
|
case sizeof(struct in6_addr):
|
|
af = AF_INET6;
|
|
break;
|
|
#endif
|
|
default:
|
|
return -1;
|
|
break;
|
|
}
|
|
len = pimv2_addr_len;
|
|
hdrlen = 0;
|
|
}
|
|
|
|
bp += hdrlen;
|
|
switch (at) {
|
|
case pimv2_unicast:
|
|
TCHECK2(bp[0], len);
|
|
if (af == AF_INET) {
|
|
if (!silent)
|
|
(void)printf("%s", ipaddr_string(bp));
|
|
}
|
|
#ifdef INET6
|
|
else if (af == AF_INET6) {
|
|
if (!silent)
|
|
(void)printf("%s", ip6addr_string(bp));
|
|
}
|
|
#endif
|
|
return hdrlen + len;
|
|
case pimv2_group:
|
|
case pimv2_source:
|
|
TCHECK2(bp[0], len + 2);
|
|
if (af == AF_INET) {
|
|
if (!silent) {
|
|
(void)printf("%s", ipaddr_string(bp + 2));
|
|
if (bp[1] != 32)
|
|
(void)printf("/%u", bp[1]);
|
|
}
|
|
}
|
|
#ifdef INET6
|
|
else if (af == AF_INET6) {
|
|
if (!silent) {
|
|
(void)printf("%s", ip6addr_string(bp + 2));
|
|
if (bp[1] != 128)
|
|
(void)printf("/%u", bp[1]);
|
|
}
|
|
}
|
|
#endif
|
|
if (bp[0] && !silent) {
|
|
if (at == pimv2_group) {
|
|
(void)printf("(0x%02x)", bp[0]);
|
|
} else {
|
|
(void)printf("(%s%s%s",
|
|
bp[0] & 0x04 ? "S" : "",
|
|
bp[0] & 0x02 ? "W" : "",
|
|
bp[0] & 0x01 ? "R" : "");
|
|
if (bp[0] & 0xf8) {
|
|
(void) printf("+0x%02x", bp[0] & 0xf8);
|
|
}
|
|
(void)printf(")");
|
|
}
|
|
}
|
|
return hdrlen + 2 + len;
|
|
default:
|
|
return -1;
|
|
}
|
|
trunc:
|
|
return -1;
|
|
}
|
|
|
|
static void
|
|
pimv2_print(register const u_char *bp, register u_int len, u_int cksum)
|
|
{
|
|
register const u_char *ep;
|
|
register struct pim *pim = (struct pim *)bp;
|
|
int advance;
|
|
|
|
ep = (const u_char *)snapend;
|
|
if (bp >= ep)
|
|
return;
|
|
if (ep > bp + len)
|
|
ep = bp + len;
|
|
TCHECK(pim->pim_rsv);
|
|
pimv2_addr_len = pim->pim_rsv;
|
|
if (pimv2_addr_len != 0)
|
|
(void)printf(", RFC2117-encoding");
|
|
|
|
printf(", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum));
|
|
if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
|
|
printf("(unverified)");
|
|
} else {
|
|
printf("(%scorrect)", TTEST2(bp[0], len) && cksum ? "in" : "" );
|
|
}
|
|
|
|
switch (PIM_TYPE(pim->pim_typever)) {
|
|
case PIMV2_TYPE_HELLO:
|
|
{
|
|
u_int16_t otype, olen;
|
|
bp += 4;
|
|
while (bp < ep) {
|
|
TCHECK2(bp[0], 4);
|
|
otype = EXTRACT_16BITS(&bp[0]);
|
|
olen = EXTRACT_16BITS(&bp[2]);
|
|
TCHECK2(bp[0], 4 + olen);
|
|
|
|
printf("\n\t %s Option (%u), length %u, Value: ",
|
|
tok2str( pimv2_hello_option_values,"Unknown",otype),
|
|
otype,
|
|
olen);
|
|
bp += 4;
|
|
|
|
switch (otype) {
|
|
case PIMV2_HELLO_OPTION_HOLDTIME:
|
|
relts_print(EXTRACT_16BITS(bp));
|
|
break;
|
|
|
|
case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
|
|
if (olen != 4) {
|
|
(void)printf("ERROR: Option Length != 4 Bytes (%u)", olen);
|
|
} else {
|
|
char t_bit;
|
|
u_int16_t lan_delay, override_interval;
|
|
lan_delay = EXTRACT_16BITS(bp);
|
|
override_interval = EXTRACT_16BITS(bp+2);
|
|
t_bit = (lan_delay & 0x8000)? 1 : 0;
|
|
lan_delay &= ~0x8000;
|
|
(void)printf("\n\t T-bit=%d, LAN delay %dms, Override interval %dms",
|
|
t_bit, lan_delay, override_interval);
|
|
}
|
|
break;
|
|
|
|
case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
|
|
case PIMV2_HELLO_OPTION_DR_PRIORITY:
|
|
switch (olen) {
|
|
case 0:
|
|
printf("Bi-Directional Capability (Old)");
|
|
break;
|
|
case 4:
|
|
printf("%u", EXTRACT_32BITS(bp));
|
|
break;
|
|
default:
|
|
printf("ERROR: Option Length != 4 Bytes (%u)", olen);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case PIMV2_HELLO_OPTION_GENID:
|
|
(void)printf("0x%08x", EXTRACT_32BITS(bp));
|
|
break;
|
|
|
|
case PIMV2_HELLO_OPTION_REFRESH_CAP:
|
|
(void)printf("v%d", *bp);
|
|
if (*(bp+1) != 0) {
|
|
(void)printf(", interval ");
|
|
relts_print(*(bp+1));
|
|
}
|
|
if (EXTRACT_16BITS(bp+2) != 0) {
|
|
(void)printf(" ?0x%04x?", EXTRACT_16BITS(bp+2));
|
|
}
|
|
break;
|
|
|
|
case PIMV2_HELLO_OPTION_BIDIR_CAP:
|
|
break;
|
|
|
|
case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
|
|
case PIMV2_HELLO_OPTION_ADDRESS_LIST:
|
|
if (vflag > 1) {
|
|
const u_char *ptr = bp;
|
|
while (ptr < (bp+olen)) {
|
|
int advance;
|
|
|
|
printf("\n\t ");
|
|
advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
|
|
if (advance < 0) {
|
|
printf("...");
|
|
break;
|
|
}
|
|
ptr += advance;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
if (vflag <= 1)
|
|
print_unknown_data(bp,"\n\t ",olen);
|
|
break;
|
|
}
|
|
/* do we want to see an additionally hexdump ? */
|
|
if (vflag> 1)
|
|
print_unknown_data(bp,"\n\t ",olen);
|
|
bp += olen;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PIMV2_TYPE_REGISTER:
|
|
{
|
|
struct ip *ip;
|
|
|
|
if (!TTEST2(*(bp+4), PIMV2_REGISTER_FLAG_LEN))
|
|
goto trunc;
|
|
|
|
printf(", Flags [ %s ]\n\t",
|
|
tok2str(pimv2_register_flag_values,
|
|
"none",
|
|
EXTRACT_32BITS(bp+4)));
|
|
|
|
bp += 8; len -= 8;
|
|
/* encapsulated multicast packet */
|
|
ip = (struct ip *)bp;
|
|
switch (IP_V(ip)) {
|
|
case 0: /* Null header */
|
|
(void)printf("IP-Null-header %s > %s",
|
|
ipaddr_string(&ip->ip_src),
|
|
ipaddr_string(&ip->ip_dst));
|
|
break;
|
|
|
|
case 4: /* IPv4 */
|
|
ip_print(gndo, bp, len);
|
|
break;
|
|
#ifdef INET6
|
|
case 6: /* IPv6 */
|
|
ip6_print(gndo, bp, len);
|
|
break;
|
|
#endif
|
|
default:
|
|
(void)printf("IP ver %d", IP_V(ip));
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PIMV2_TYPE_REGISTER_STOP:
|
|
bp += 4; len -= 4;
|
|
if (bp >= ep)
|
|
break;
|
|
(void)printf(" group=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance; len -= advance;
|
|
if (bp >= ep)
|
|
break;
|
|
(void)printf(" source=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance; len -= advance;
|
|
break;
|
|
|
|
case PIMV2_TYPE_JOIN_PRUNE:
|
|
case PIMV2_TYPE_GRAFT:
|
|
case PIMV2_TYPE_GRAFT_ACK:
|
|
|
|
|
|
/*
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* |PIM Ver| Type | Addr length | Checksum |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Unicast-Upstream Neighbor Address |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Reserved | Num groups | Holdtime |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Encoded-Multicast Group Address-1 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Number of Joined Sources | Number of Pruned Sources |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Encoded-Joined Source Address-1 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | . |
|
|
* | . |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Encoded-Joined Source Address-n |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Encoded-Pruned Source Address-1 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | . |
|
|
* | . |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Encoded-Pruned Source Address-n |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | . |
|
|
* | . |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Encoded-Multicast Group Address-n |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*/
|
|
|
|
{
|
|
u_int8_t ngroup;
|
|
u_int16_t holdtime;
|
|
u_int16_t njoin;
|
|
u_int16_t nprune;
|
|
int i, j;
|
|
|
|
bp += 4; len -= 4;
|
|
if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
|
|
if (bp >= ep)
|
|
break;
|
|
(void)printf(", upstream-neighbor: ");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance; len -= advance;
|
|
}
|
|
if (bp + 4 > ep)
|
|
break;
|
|
ngroup = bp[1];
|
|
holdtime = EXTRACT_16BITS(&bp[2]);
|
|
(void)printf("\n\t %u group(s)", ngroup);
|
|
if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
|
|
(void)printf(", holdtime: ");
|
|
if (holdtime == 0xffff)
|
|
(void)printf("infinite");
|
|
else
|
|
relts_print(holdtime);
|
|
}
|
|
bp += 4; len -= 4;
|
|
for (i = 0; i < ngroup; i++) {
|
|
if (bp >= ep)
|
|
goto jp_done;
|
|
(void)printf("\n\t group #%u: ", i+1);
|
|
if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
|
|
(void)printf("...)");
|
|
goto jp_done;
|
|
}
|
|
bp += advance; len -= advance;
|
|
if (bp + 4 > ep) {
|
|
(void)printf("...)");
|
|
goto jp_done;
|
|
}
|
|
njoin = EXTRACT_16BITS(&bp[0]);
|
|
nprune = EXTRACT_16BITS(&bp[2]);
|
|
(void)printf(", joined sources: %u, pruned sources: %u", njoin,nprune);
|
|
bp += 4; len -= 4;
|
|
for (j = 0; j < njoin; j++) {
|
|
(void)printf("\n\t joined source #%u: ",j+1);
|
|
if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
|
|
(void)printf("...)");
|
|
goto jp_done;
|
|
}
|
|
bp += advance; len -= advance;
|
|
}
|
|
for (j = 0; j < nprune; j++) {
|
|
(void)printf("\n\t pruned source #%u: ",j+1);
|
|
if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
|
|
(void)printf("...)");
|
|
goto jp_done;
|
|
}
|
|
bp += advance; len -= advance;
|
|
}
|
|
}
|
|
jp_done:
|
|
break;
|
|
}
|
|
|
|
case PIMV2_TYPE_BOOTSTRAP:
|
|
{
|
|
int i, j, frpcnt;
|
|
bp += 4;
|
|
|
|
/* Fragment Tag, Hash Mask len, and BSR-priority */
|
|
if (bp + sizeof(u_int16_t) >= ep) break;
|
|
(void)printf(" tag=%x", EXTRACT_16BITS(bp));
|
|
bp += sizeof(u_int16_t);
|
|
if (bp >= ep) break;
|
|
(void)printf(" hashmlen=%d", bp[0]);
|
|
if (bp + 1 >= ep) break;
|
|
(void)printf(" BSRprio=%d", bp[1]);
|
|
bp += 2;
|
|
|
|
/* Encoded-Unicast-BSR-Address */
|
|
if (bp >= ep) break;
|
|
(void)printf(" BSR=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance;
|
|
|
|
for (i = 0; bp < ep; i++) {
|
|
/* Encoded-Group Address */
|
|
(void)printf(" (group%d: ", i);
|
|
if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
|
|
< 0) {
|
|
(void)printf("...)");
|
|
goto bs_done;
|
|
}
|
|
bp += advance;
|
|
|
|
/* RP-Count, Frag RP-Cnt, and rsvd */
|
|
if (bp >= ep) {
|
|
(void)printf("...)");
|
|
goto bs_done;
|
|
}
|
|
(void)printf(" RPcnt=%d", bp[0]);
|
|
if (bp + 1 >= ep) {
|
|
(void)printf("...)");
|
|
goto bs_done;
|
|
}
|
|
(void)printf(" FRPcnt=%d", frpcnt = bp[1]);
|
|
bp += 4;
|
|
|
|
for (j = 0; j < frpcnt && bp < ep; j++) {
|
|
/* each RP info */
|
|
(void)printf(" RP%d=", j);
|
|
if ((advance = pimv2_addr_print(bp,
|
|
pimv2_unicast,
|
|
0)) < 0) {
|
|
(void)printf("...)");
|
|
goto bs_done;
|
|
}
|
|
bp += advance;
|
|
|
|
if (bp + 1 >= ep) {
|
|
(void)printf("...)");
|
|
goto bs_done;
|
|
}
|
|
(void)printf(",holdtime=");
|
|
relts_print(EXTRACT_16BITS(bp));
|
|
if (bp + 2 >= ep) {
|
|
(void)printf("...)");
|
|
goto bs_done;
|
|
}
|
|
(void)printf(",prio=%d", bp[2]);
|
|
bp += 4;
|
|
}
|
|
(void)printf(")");
|
|
}
|
|
bs_done:
|
|
break;
|
|
}
|
|
case PIMV2_TYPE_ASSERT:
|
|
bp += 4; len -= 4;
|
|
if (bp >= ep)
|
|
break;
|
|
(void)printf(" group=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance; len -= advance;
|
|
if (bp >= ep)
|
|
break;
|
|
(void)printf(" src=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance; len -= advance;
|
|
if (bp + 8 > ep)
|
|
break;
|
|
if (bp[0] & 0x80)
|
|
(void)printf(" RPT");
|
|
(void)printf(" pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff);
|
|
(void)printf(" metric=%u", EXTRACT_32BITS(&bp[4]));
|
|
break;
|
|
|
|
case PIMV2_TYPE_CANDIDATE_RP:
|
|
{
|
|
int i, pfxcnt;
|
|
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=");
|
|
relts_print(EXTRACT_16BITS(&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;
|
|
}
|
|
|
|
case PIMV2_TYPE_PRUNE_REFRESH:
|
|
(void)printf(" src=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance;
|
|
(void)printf(" grp=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_group, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance;
|
|
(void)printf(" forwarder=");
|
|
if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
|
|
(void)printf("...");
|
|
break;
|
|
}
|
|
bp += advance;
|
|
TCHECK2(bp[0], 2);
|
|
(void)printf(" TUNR ");
|
|
relts_print(EXTRACT_16BITS(bp));
|
|
break;
|
|
|
|
|
|
default:
|
|
(void)printf(" [type %d]", PIM_TYPE(pim->pim_typever));
|
|
break;
|
|
}
|
|
|
|
return;
|
|
|
|
trunc:
|
|
(void)printf("[|pim]");
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-style: whitesmith
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|