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print-pim.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.
 */

#ifndef lint
static const char rcsid[] _U_ =
    "@(#) $Header: /tcpdump/master/tcpdump/print-pim.c,v 1.37.2.4 2004/03/24 02:52:37 guy Exp $ (LBL)";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <tcpdump-stdinc.h>

/*
 * 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);

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], 4);
      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--) {
            TCHECK2(bp[0], 4);
            (void)printf("\n\tGroup: %s", ipaddr_string(bp));
            TCHECK2(bp[4], 4);
            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], 4);
            (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], 4);
            (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)
{
      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:           /* avoid hardcoding? */
            (void)printf("pim v2");
            pimv2_print(bp, len);
            break;
      default:
            (void)printf("pim v%d", PIM_VER(pim->pim_typever));
            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;
      const char *afstr;
      int len, hdrlen;

      TCHECK(bp[0]);

      if (pimv2_addr_len == 0) {
            TCHECK(bp[1]);
            switch (bp[0]) {
            case 1:
                  af = AF_INET;
                  afstr = "IPv4";
                  len = 4;
                  break;
#ifdef INET6
            case 2:
                  af = AF_INET6;
                  afstr = "IPv6";
                  len = 16;
                  break;
#endif
            default:
                  return -1;
            }
            if (bp[1] != 0)
                  return -1;
            hdrlen = 2;
      } else {
            switch (pimv2_addr_len) {
            case 4:
                  af = AF_INET;
                  afstr = "IPv4";
                  break;
#ifdef INET6
            case 16:
                  af = AF_INET6;
                  afstr = "IPv6";
                  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)
{
      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] ");

      switch (PIM_TYPE(pim->pim_typever)) {
      case 0:
          {
            u_int16_t otype, olen;
            (void)printf(" Hello");
            bp += 4;
            while (bp < ep) {
                  TCHECK2(bp[0], 4);
                  otype = EXTRACT_16BITS(&bp[0]);
                  olen = EXTRACT_16BITS(&bp[2]);
                  TCHECK2(bp[0], 4 + olen);
                  switch (otype) {
                  case 1:           /* Hold time */
                        (void)printf(" (Hold-time ");
                        relts_print(EXTRACT_16BITS(&bp[4]));
                        (void)printf(")");
                        break;

                  case 2:           /* LAN Prune Delay */
                        (void)printf(" (LAN-Prune-Delay: ");
                        if (olen != 4) {
                              (void)printf("!olen=%d!)", olen);
                        } else {
                              char t_bit;
                              u_int16_t lan_delay, override_interval;
                              lan_delay = EXTRACT_16BITS(&bp[4]);
                              override_interval = EXTRACT_16BITS(&bp[6]);
                              t_bit = (lan_delay & 0x8000)? 1 : 0;
                              lan_delay &= ~0x8000;
                              (void)printf("T-bit=%d lan-delay=%dms override-interval=%dms)",
                              t_bit, lan_delay, override_interval);
                        }
                        break;

                  case 18:    /* Old DR-Priority */
                        if (olen == 4)
                              (void)printf(" (OLD-DR-Priority: %d)",
                                          EXTRACT_32BITS(&bp[4]));
                        else
                              goto unknown;
                        break;


                  case 19:    /* DR-Priority */
                        if (olen == 0) {
                              (void)printf(" (OLD-bidir-capable)");
                              break;
                        }
                        (void)printf(" (DR-Priority: ");
                        if (olen != 4) {
                              (void)printf("!olen=%d!)", olen);
                        } else {
                              (void)printf("%d)", EXTRACT_32BITS(&bp[4]));
                        }
                        break;

                  case 20:
                        (void)printf(" (Genid: 0x%08x)", EXTRACT_32BITS(&bp[4]));
                        break;

                  case 21:
                        (void)printf(" (State Refresh Capable; v%d", bp[4]);
                        if (bp[5] != 0) {
                              (void)printf(" interval ");
                              relts_print(bp[5]);
                        }
                        if (EXTRACT_16BITS(&bp[6]) != 0) {
                              (void)printf(" ?0x%04x?", EXTRACT_16BITS(&bp[6]));
                        }
                        (void)printf(")");
                        break;

                  case 22:    /* Bidir-Capable */
                        (void)printf(" (bidir-capable)");
                        break;

                  case 24:    /* Address List */
                  case 65001: /* Address List (old implementations) */
                        (void)printf(" (%saddr-list",
                                   otype == 65001 ? "old" : "");
                        if (vflag > 1) {
                              const u_char *ptr = &bp[4];
                              while (ptr < &bp[4 + olen]) {
                                    int advance;

                                    printf(" ");
                                    advance = pimv2_addr_print(ptr, pimv2_unicast, 0);
                                    if (advance < 0) {
                                          printf("...");
                                          break;
                                    }
                                    ptr += advance;
                              }
                        }
                        (void)printf(")");
                        break;
                  default:
                  unknown:
                        if (vflag)
                              (void)printf(" [Hello option %d]", otype);
                  }
                  bp += 4 + olen;
            }
            break;
          }

      case 1:
      {
            struct ip *ip;

            (void)printf(" Register");
            if (vflag && bp + 8 <= ep) {
                  (void)printf(" %s%s", bp[4] & 0x80 ? "B" : "",
                        bp[4] & 0x40 ? "N" : "");
            }
            bp += 8; len -= 8;

            /* encapsulated multicast packet */
            if (bp >= ep)
                  break;
            ip = (struct ip *)bp;
            switch (IP_V(ip)) {
            case 4:     /* IPv4 */
                  printf(" ");
                  ip_print(bp, len);
                  break;
#ifdef INET6
            case 6:     /* IPv6 */
                  printf(" ");
                  ip6_print(bp, len);
                  break;
#endif
            default:
                  (void)printf(" IP ver %d", IP_V(ip));
                  break;
            }
            break;
      }

      case 2:
            (void)printf(" 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 3:
      case 6:
      case 7:
          {
            u_int8_t ngroup;
            u_int16_t holdtime;
            u_int16_t njoin;
            u_int16_t nprune;
            int i, j;

            switch (PIM_TYPE(pim->pim_typever)) {
            case 3:
                  (void)printf(" Join/Prune");
                  break;
            case 6:
                  (void)printf(" Graft");
                  break;
            case 7:
                  (void)printf(" Graft-ACK");
                  break;
            }
            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(" groups=%u", ngroup);
            if (PIM_TYPE(pim->pim_typever) != 7) {    /*not for Graft-ACK*/
                  (void)printf(" holdtime=");
                  if (holdtime == 0xffff)
                        (void)printf("infty");
                  else
                        relts_print(holdtime);
            }
            bp += 4; len -= 4;
            for (i = 0; i < ngroup; i++) {
                  if (bp >= ep)
                        goto jp_done;
                  (void)printf(" (group%d: ", i);
                  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(" join=%u", njoin);
                  bp += 4; len -= 4;
                  for (j = 0; j < njoin; j++) {
                        (void)printf(" ");
                        if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
                              (void)printf("...)");
                              goto jp_done;
                        }
                        bp += advance; len -= advance;
                  }
                  (void)printf(" prune=%u", nprune);
                  for (j = 0; j < nprune; j++) {
                        (void)printf(" ");
                        if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
                              (void)printf("...)");
                              goto jp_done;
                        }
                        bp += advance; len -= advance;
                  }
                  (void)printf(")");
            }
      jp_done:
            break;
          }

      case 4:
      {
            int i, j, frpcnt;

            (void)printf(" Bootstrap");
            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 5:
            (void)printf(" 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 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=");
            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 9:
            (void)printf(" 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]");
}

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