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052094d865
tcpdump/print-pim.c
Hannes Gredler a0275861d3 modularize ip6 nextlayer checksum generation and 
change tcp6 and pim6 to use it.
2009-10-12 10:16:58 +02:00

1092 lines
30 KiB
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/*
* 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.
*/
#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 "interface.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 */
};
#include <stdio.h>
#include <stdlib.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
#include "ip.h"
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] & 0xfe)
(void)printf("[rsvd=0x%02x]", bp[0] & 0xfe);
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 Lenght != 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 Lenght != 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(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:
*/
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