* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-pim.c,v 1.7 1999-10-07 23:47:12 mcr Exp $ (LBL)";
+#define NETDISSECT_REWORKED
+#ifdef HAVE_CONFIG_H
+#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#include <netinet/udp.h>
-#include <netinet/udp_var.h>
-#include <netinet/tcp.h>
-#include <netinet/tcpip.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
+#include <tcpdump-stdinc.h>
#include "interface.h"
#include "addrtoname.h"
+#include "extract.h"
+
+#include "ip.h"
+
+#define PIMV1_TYPE_QUERY 0
+#define PIMV1_TYPE_REGISTER 1
+#define PIMV1_TYPE_REGISTER_STOP 2
+#define PIMV1_TYPE_JOIN_PRUNE 3
+#define PIMV1_TYPE_RP_REACHABILITY 4
+#define PIMV1_TYPE_ASSERT 5
+#define PIMV1_TYPE_GRAFT 6
+#define PIMV1_TYPE_GRAFT_ACK 7
+
+static const struct tok pimv1_type_str[] = {
+ { PIMV1_TYPE_QUERY, "Query" },
+ { PIMV1_TYPE_REGISTER, "Register" },
+ { PIMV1_TYPE_REGISTER_STOP, "Register-Stop" },
+ { PIMV1_TYPE_JOIN_PRUNE, "Join/Prune" },
+ { PIMV1_TYPE_RP_REACHABILITY, "RP-reachable" },
+ { PIMV1_TYPE_ASSERT, "Assert" },
+ { PIMV1_TYPE_GRAFT, "Graft" },
+ { PIMV1_TYPE_GRAFT_ACK, "Graft-ACK" },
+ { 0, NULL }
+};
+
+#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
+#define PIMV2_TYPE_DF_ELECTION 10
+#define PIMV2_TYPE_ECMP_REDIRECT 11
+
+static const 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" },
+ { PIMV2_TYPE_DF_ELECTION, "DF Election" },
+ { PIMV2_TYPE_ECMP_REDIRECT, "ECMP Redirect" },
+ { 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 const 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 const 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 {
+ uint8_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(netdissect_options *, register const u_char *bp, register u_int len, u_int cksum);
+
+static void
+pimv1_join_prune_print(netdissect_options *ndo,
+ register const u_char *bp, register u_int len)
+{
+ int ngroups, njoin, nprune;
+ int njp;
+
+ /* If it's a single group and a single source, use 1-line output. */
+ if (ND_TTEST2(bp[0], 30) && bp[11] == 1 &&
+ ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) {
+ int hold;
+
+ ND_PRINT((ndo, " RPF %s ", ipaddr_string(ndo, bp)));
+ hold = EXTRACT_16BITS(&bp[6]);
+ if (hold != 180) {
+ ND_PRINT((ndo, "Hold "));
+ relts_print(ndo, hold);
+ }
+ ND_PRINT((ndo, "%s (%s/%d, %s", njoin ? "Join" : "Prune",
+ ipaddr_string(ndo, &bp[26]), bp[25] & 0x3f,
+ ipaddr_string(ndo, &bp[12])));
+ if (EXTRACT_32BITS(&bp[16]) != 0xffffffff)
+ ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[16])));
+ ND_PRINT((ndo, ") %s%s %s",
+ (bp[24] & 0x01) ? "Sparse" : "Dense",
+ (bp[25] & 0x80) ? " WC" : "",
+ (bp[25] & 0x40) ? "RP" : "SPT"));
+ return;
+ }
+
+ ND_TCHECK2(bp[0], sizeof(struct in_addr));
+ if (ndo->ndo_vflag > 1)
+ ND_PRINT((ndo, "\n"));
+ ND_PRINT((ndo, " Upstream Nbr: %s", ipaddr_string(ndo, bp)));
+ ND_TCHECK2(bp[6], 2);
+ if (ndo->ndo_vflag > 1)
+ ND_PRINT((ndo, "\n"));
+ ND_PRINT((ndo, " Hold time: "));
+ relts_print(ndo, EXTRACT_16BITS(&bp[6]));
+ if (ndo->ndo_vflag < 2)
+ return;
+ bp += 8;
+ len -= 8;
+
+ ND_TCHECK2(bp[0], 4);
+ ngroups = bp[3];
+ bp += 4;
+ len -= 4;
+ while (ngroups--) {
+ /*
+ * XXX - does the address have length "addrlen" and the
+ * mask length "maddrlen"?
+ */
+ ND_TCHECK2(bp[0], sizeof(struct in_addr));
+ ND_PRINT((ndo, "\n\tGroup: %s", ipaddr_string(ndo, bp)));
+ ND_TCHECK2(bp[4], sizeof(struct in_addr));
+ if (EXTRACT_32BITS(&bp[4]) != 0xffffffff)
+ ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[4])));
+ ND_TCHECK2(bp[8], 4);
+ njoin = EXTRACT_16BITS(&bp[8]);
+ nprune = EXTRACT_16BITS(&bp[10]);
+ ND_PRINT((ndo, " 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";
+ ND_TCHECK2(bp[0], 6);
+ ND_PRINT((ndo, "\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(ndo, &bp[2]), bp[1] & 0x3f));
+ bp += 6;
+ len -= 6;
+ }
+ }
+ return;
+trunc:
+ ND_PRINT((ndo, "[|pim]"));
+ return;
+}
void
-pim_print(register const u_char *bp, register u_int len)
+pimv1_print(netdissect_options *ndo,
+ register const u_char *bp, register u_int len)
{
- register const u_char *ep;
- register u_char type;
+ register const u_char *ep;
+ register u_char type;
+
+ ep = (const u_char *)ndo->ndo_snapend;
+ if (bp >= ep)
+ return;
+
+ ND_TCHECK(bp[1]);
+ type = bp[1];
+
+ ND_PRINT((ndo, " %s", tok2str(pimv1_type_str, "[type %u]", type)));
+ switch (type) {
+ case PIMV1_TYPE_QUERY:
+ if (ND_TTEST(bp[8])) {
+ switch (bp[8] >> 4) {
+ case 0:
+ ND_PRINT((ndo, " Dense-mode"));
+ break;
+ case 1:
+ ND_PRINT((ndo, " Sparse-mode"));
+ break;
+ case 2:
+ ND_PRINT((ndo, " Sparse-Dense-mode"));
+ break;
+ default:
+ ND_PRINT((ndo, " mode-%d", bp[8] >> 4));
+ break;
+ }
+ }
+ if (ndo->ndo_vflag) {
+ ND_TCHECK2(bp[10],2);
+ ND_PRINT((ndo, " (Hold-time "));
+ relts_print(ndo, EXTRACT_16BITS(&bp[10]));
+ ND_PRINT((ndo, ")"));
+ }
+ break;
+
+ case PIMV1_TYPE_REGISTER:
+ ND_TCHECK2(bp[8], 20); /* ip header */
+ ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[20]),
+ ipaddr_string(ndo, &bp[24])));
+ break;
+ case PIMV1_TYPE_REGISTER_STOP:
+ ND_TCHECK2(bp[12], sizeof(struct in_addr));
+ ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[8]),
+ ipaddr_string(ndo, &bp[12])));
+ break;
+ case PIMV1_TYPE_RP_REACHABILITY:
+ if (ndo->ndo_vflag) {
+ ND_TCHECK2(bp[22], 2);
+ ND_PRINT((ndo, " group %s", ipaddr_string(ndo, &bp[8])));
+ if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
+ ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12])));
+ ND_PRINT((ndo, " RP %s hold ", ipaddr_string(ndo, &bp[16])));
+ relts_print(ndo, EXTRACT_16BITS(&bp[22]));
+ }
+ break;
+ case PIMV1_TYPE_ASSERT:
+ ND_TCHECK2(bp[16], sizeof(struct in_addr));
+ ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[16]),
+ ipaddr_string(ndo, &bp[8])));
+ if (EXTRACT_32BITS(&bp[12]) != 0xffffffff)
+ ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12])));
+ ND_TCHECK2(bp[24], 4);
+ ND_PRINT((ndo, " %s pref %d metric %d",
+ (bp[20] & 0x80) ? "RP-tree" : "SPT",
+ EXTRACT_32BITS(&bp[20]) & 0x7fffffff,
+ EXTRACT_32BITS(&bp[24])));
+ break;
+ case PIMV1_TYPE_JOIN_PRUNE:
+ case PIMV1_TYPE_GRAFT:
+ case PIMV1_TYPE_GRAFT_ACK:
+ if (ndo->ndo_vflag)
+ pimv1_join_prune_print(ndo, &bp[8], len - 8);
+ break;
+ }
+ if ((bp[4] >> 4) != 1)
+ ND_PRINT((ndo, " [v%d]", bp[4] >> 4));
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|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(netdissect_options *ndo,
+ register const u_char *bp, register u_int len)
+{
+ int type;
+ int numrps;
+ int hold;
+
+ ND_TCHECK(bp[0]);
+ ND_PRINT((ndo, " auto-rp "));
+ type = bp[0];
+ switch (type) {
+ case 0x11:
+ ND_PRINT((ndo, "candidate-advert"));
+ break;
+ case 0x12:
+ ND_PRINT((ndo, "mapping"));
+ break;
+ default:
+ ND_PRINT((ndo, "type-0x%02x", type));
+ break;
+ }
+
+ ND_TCHECK(bp[1]);
+ numrps = bp[1];
+
+ ND_TCHECK2(bp[2], 2);
+ ND_PRINT((ndo, " Hold "));
+ hold = EXTRACT_16BITS(&bp[2]);
+ if (hold)
+ relts_print(ndo, EXTRACT_16BITS(&bp[2]));
+ else
+ ND_PRINT((ndo, "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;
+
+ ND_TCHECK2(bp[0], 4);
+ ND_PRINT((ndo, " RP %s", ipaddr_string(ndo, bp)));
+ ND_TCHECK(bp[4]);
+ switch (bp[4] & 0x3) {
+ case 0: ND_PRINT((ndo, " PIMv?"));
+ break;
+ case 1: ND_PRINT((ndo, " PIMv1"));
+ break;
+ case 2: ND_PRINT((ndo, " PIMv2"));
+ break;
+ case 3: ND_PRINT((ndo, " PIMv1+2"));
+ break;
+ }
+ if (bp[4] & 0xfc)
+ ND_PRINT((ndo, " [rsvd=0x%02x]", bp[4] & 0xfc));
+ ND_TCHECK(bp[5]);
+ nentries = bp[5];
+ bp += 6; len -= 6;
+ s = ' ';
+ for (; nentries; nentries--) {
+ ND_TCHECK2(bp[0], 6);
+ ND_PRINT((ndo, "%c%s%s/%d", s, bp[0] & 1 ? "!" : "",
+ ipaddr_string(ndo, &bp[2]), bp[1]));
+ if (bp[0] & 0x02) {
+ ND_PRINT((ndo, " bidir"));
+ }
+ if (bp[0] & 0xfc) {
+ ND_PRINT((ndo, "[rsvd=0x%02x]", bp[0] & 0xfc));
+ }
+ s = ',';
+ bp += 6; len -= 6;
+ }
+ }
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|autorp]"));
+ return;
+}
+
+void
+pim_print(netdissect_options *ndo,
+ 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 *)ndo->ndo_snapend;
+ if (bp >= ep)
+ return;
+#ifdef notyet /* currently we see only version and type */
+ ND_TCHECK(pim->pim_rsv);
+#endif
- ep = (const u_char *)snapend;
- if (bp >= ep)
+ switch (PIM_VER(pim->pim_typever)) {
+ case 2:
+ if (!ndo->ndo_vflag) {
+ ND_PRINT((ndo, "PIMv%u, %s, length %u",
+ PIM_VER(pim->pim_typever),
+ tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)),
+ len));
+ return;
+ } else {
+ ND_PRINT((ndo, "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(ndo, bp, len, cksum);
+ }
+ break;
+ default:
+ ND_PRINT((ndo, "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(netdissect_options *ndo,
+ const u_char *bp, enum pimv2_addrtype at, int silent)
+{
+ int af;
+ int len, hdrlen;
+
+ ND_TCHECK(bp[0]);
+
+ if (pimv2_addr_len == 0) {
+ ND_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:
+ ND_TCHECK2(bp[0], len);
+ if (af == AF_INET) {
+ if (!silent)
+ ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp)));
+ }
+#ifdef INET6
+ else if (af == AF_INET6) {
+ if (!silent)
+ ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp)));
+ }
+#endif
+ return hdrlen + len;
+ case pimv2_group:
+ case pimv2_source:
+ ND_TCHECK2(bp[0], len + 2);
+ if (af == AF_INET) {
+ if (!silent) {
+ ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp + 2)));
+ if (bp[1] != 32)
+ ND_PRINT((ndo, "/%u", bp[1]));
+ }
+ }
+#ifdef INET6
+ else if (af == AF_INET6) {
+ if (!silent) {
+ ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp + 2)));
+ if (bp[1] != 128)
+ ND_PRINT((ndo, "/%u", bp[1]));
+ }
+ }
+#endif
+ if (bp[0] && !silent) {
+ if (at == pimv2_group) {
+ ND_PRINT((ndo, "(0x%02x)", bp[0]));
+ } else {
+ ND_PRINT((ndo, "(%s%s%s",
+ bp[0] & 0x04 ? "S" : "",
+ bp[0] & 0x02 ? "W" : "",
+ bp[0] & 0x01 ? "R" : ""));
+ if (bp[0] & 0xf8) {
+ ND_PRINT((ndo, "+0x%02x", bp[0] & 0xf8));
+ }
+ ND_PRINT((ndo, ")"));
+ }
+ }
+ return hdrlen + 2 + len;
+ default:
+ return -1;
+ }
+trunc:
+ return -1;
+}
+
+static void
+pimv2_print(netdissect_options *ndo,
+ 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 *)ndo->ndo_snapend;
+ if (bp >= ep)
+ return;
+ if (ep > bp + len)
+ ep = bp + len;
+ ND_TCHECK(pim->pim_rsv);
+ pimv2_addr_len = pim->pim_rsv;
+ if (pimv2_addr_len != 0)
+ ND_PRINT((ndo, ", RFC2117-encoding"));
+
+ ND_PRINT((ndo, ", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum)));
+ if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
+ ND_PRINT((ndo, "(unverified)"));
+ } else {
+ ND_PRINT((ndo, "(%scorrect)", ND_TTEST2(bp[0], len) && cksum ? "in" : "" ));
+ }
+
+ switch (PIM_TYPE(pim->pim_typever)) {
+ case PIMV2_TYPE_HELLO:
+ {
+ uint16_t otype, olen;
+ bp += 4;
+ while (bp < ep) {
+ ND_TCHECK2(bp[0], 4);
+ otype = EXTRACT_16BITS(&bp[0]);
+ olen = EXTRACT_16BITS(&bp[2]);
+ ND_TCHECK2(bp[0], 4 + olen);
+ ND_PRINT((ndo, "\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(ndo, EXTRACT_16BITS(bp));
+ break;
- type = bp[1];
+ case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
+ if (olen != 4) {
+ ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen));
+ } else {
+ char t_bit;
+ uint16_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;
+ ND_PRINT((ndo, "\n\t T-bit=%d, LAN delay %dms, Override interval %dms",
+ t_bit, lan_delay, override_interval));
+ }
+ break;
- switch (type) {
- case 0:
- (void)printf(" Query");
- break;
+ case PIMV2_HELLO_OPTION_DR_PRIORITY_OLD:
+ case PIMV2_HELLO_OPTION_DR_PRIORITY:
+ switch (olen) {
+ case 0:
+ ND_PRINT((ndo, "Bi-Directional Capability (Old)"));
+ break;
+ case 4:
+ ND_PRINT((ndo, "%u", EXTRACT_32BITS(bp)));
+ break;
+ default:
+ ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen));
+ break;
+ }
+ break;
- case 1:
- (void)printf(" Register");
- break;
+ case PIMV2_HELLO_OPTION_GENID:
+ ND_PRINT((ndo, "0x%08x", EXTRACT_32BITS(bp)));
+ break;
- case 2:
- (void)printf(" Register-Stop");
- break;
+ case PIMV2_HELLO_OPTION_REFRESH_CAP:
+ ND_PRINT((ndo, "v%d", *bp));
+ if (*(bp+1) != 0) {
+ ND_PRINT((ndo, ", interval "));
+ relts_print(ndo, *(bp+1));
+ }
+ if (EXTRACT_16BITS(bp+2) != 0) {
+ ND_PRINT((ndo, " ?0x%04x?", EXTRACT_16BITS(bp+2)));
+ }
+ break;
- case 3:
- (void)printf(" Join/Prune");
- break;
+ case PIMV2_HELLO_OPTION_BIDIR_CAP:
+ break;
- case 4:
- (void)printf(" RP-reachable");
- break;
+ case PIMV2_HELLO_OPTION_ADDRESS_LIST_OLD:
+ case PIMV2_HELLO_OPTION_ADDRESS_LIST:
+ if (ndo->ndo_vflag > 1) {
+ const u_char *ptr = bp;
+ while (ptr < (bp+olen)) {
+ int advance;
- case 5:
- (void)printf(" Assert");
- break;
+ ND_PRINT((ndo, "\n\t "));
+ advance = pimv2_addr_print(ndo, ptr, pimv2_unicast, 0);
+ if (advance < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ ptr += advance;
+ }
+ }
+ break;
+ default:
+ if (ndo->ndo_vflag <= 1)
+ print_unknown_data(ndo, bp, "\n\t ", olen);
+ break;
+ }
+ /* do we want to see an additionally hexdump ? */
+ if (ndo->ndo_vflag> 1)
+ print_unknown_data(ndo, bp, "\n\t ", olen);
+ bp += olen;
+ }
+ break;
+ }
- case 6:
- (void)printf(" Graft");
- break;
+ case PIMV2_TYPE_REGISTER:
+ {
+ struct ip *ip;
- case 7:
- (void)printf(" Graft-ACK");
- break;
+ ND_TCHECK2(*(bp + 4), PIMV2_REGISTER_FLAG_LEN);
- case 8:
- (void)printf(" Mode");
- break;
+ ND_PRINT((ndo, ", Flags [ %s ]\n\t",
+ tok2str(pimv2_register_flag_values,
+ "none",
+ EXTRACT_32BITS(bp+4))));
- default:
- (void)printf(" [type %d]", type);
- break;
- }
+ bp += 8; len -= 8;
+ /* encapsulated multicast packet */
+ ip = (struct ip *)bp;
+ switch (IP_V(ip)) {
+ case 0: /* Null header */
+ ND_PRINT((ndo, "IP-Null-header %s > %s",
+ ipaddr_string(ndo, &ip->ip_src),
+ ipaddr_string(ndo, &ip->ip_dst)));
+ break;
+
+ case 4: /* IPv4 */
+ ip_print(ndo, bp, len);
+ break;
+#ifdef INET6
+ case 6: /* IPv6 */
+ ip6_print(ndo, bp, len);
+ break;
+#endif
+ default:
+ ND_PRINT((ndo, "IP ver %d", IP_V(ip)));
+ break;
+ }
+ break;
+ }
+
+ case PIMV2_TYPE_REGISTER_STOP:
+ bp += 4; len -= 4;
+ if (bp >= ep)
+ break;
+ ND_PRINT((ndo, " group="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance; len -= advance;
+ if (bp >= ep)
+ break;
+ ND_PRINT((ndo, " source="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ 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 |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+ {
+ uint8_t ngroup;
+ uint16_t holdtime;
+ uint16_t njoin;
+ uint16_t nprune;
+ int i, j;
+
+ bp += 4; len -= 4;
+ if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
+ if (bp >= ep)
+ break;
+ ND_PRINT((ndo, ", upstream-neighbor: "));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance; len -= advance;
+ }
+ if (bp + 4 > ep)
+ break;
+ ngroup = bp[1];
+ holdtime = EXTRACT_16BITS(&bp[2]);
+ ND_PRINT((ndo, "\n\t %u group(s)", ngroup));
+ if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
+ ND_PRINT((ndo, ", holdtime: "));
+ if (holdtime == 0xffff)
+ ND_PRINT((ndo, "infinite"));
+ else
+ relts_print(ndo, holdtime);
+ }
+ bp += 4; len -= 4;
+ for (i = 0; i < ngroup; i++) {
+ if (bp >= ep)
+ goto jp_done;
+ ND_PRINT((ndo, "\n\t group #%u: ", i+1));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
+ ND_PRINT((ndo, "...)"));
+ goto jp_done;
+ }
+ bp += advance; len -= advance;
+ if (bp + 4 > ep) {
+ ND_PRINT((ndo, "...)"));
+ goto jp_done;
+ }
+ njoin = EXTRACT_16BITS(&bp[0]);
+ nprune = EXTRACT_16BITS(&bp[2]);
+ ND_PRINT((ndo, ", joined sources: %u, pruned sources: %u", njoin, nprune));
+ bp += 4; len -= 4;
+ for (j = 0; j < njoin; j++) {
+ ND_PRINT((ndo, "\n\t joined source #%u: ", j+1));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_source, 0)) < 0) {
+ ND_PRINT((ndo, "...)"));
+ goto jp_done;
+ }
+ bp += advance; len -= advance;
+ }
+ for (j = 0; j < nprune; j++) {
+ ND_PRINT((ndo, "\n\t pruned source #%u: ", j+1));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_source, 0)) < 0) {
+ ND_PRINT((ndo, "...)"));
+ 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(uint16_t) >= ep) break;
+ ND_PRINT((ndo, " tag=%x", EXTRACT_16BITS(bp)));
+ bp += sizeof(uint16_t);
+ if (bp >= ep) break;
+ ND_PRINT((ndo, " hashmlen=%d", bp[0]));
+ if (bp + 1 >= ep) break;
+ ND_PRINT((ndo, " BSRprio=%d", bp[1]));
+ bp += 2;
+
+ /* Encoded-Unicast-BSR-Address */
+ if (bp >= ep) break;
+ ND_PRINT((ndo, " BSR="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance;
+
+ for (i = 0; bp < ep; i++) {
+ /* Encoded-Group Address */
+ ND_PRINT((ndo, " (group%d: ", i));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0))
+ < 0) {
+ ND_PRINT((ndo, "...)"));
+ goto bs_done;
+ }
+ bp += advance;
+
+ /* RP-Count, Frag RP-Cnt, and rsvd */
+ if (bp >= ep) {
+ ND_PRINT((ndo, "...)"));
+ goto bs_done;
+ }
+ ND_PRINT((ndo, " RPcnt=%d", bp[0]));
+ if (bp + 1 >= ep) {
+ ND_PRINT((ndo, "...)"));
+ goto bs_done;
+ }
+ ND_PRINT((ndo, " FRPcnt=%d", frpcnt = bp[1]));
+ bp += 4;
+
+ for (j = 0; j < frpcnt && bp < ep; j++) {
+ /* each RP info */
+ ND_PRINT((ndo, " RP%d=", j));
+ if ((advance = pimv2_addr_print(ndo, bp,
+ pimv2_unicast,
+ 0)) < 0) {
+ ND_PRINT((ndo, "...)"));
+ goto bs_done;
+ }
+ bp += advance;
+
+ if (bp + 1 >= ep) {
+ ND_PRINT((ndo, "...)"));
+ goto bs_done;
+ }
+ ND_PRINT((ndo, ",holdtime="));
+ relts_print(ndo, EXTRACT_16BITS(bp));
+ if (bp + 2 >= ep) {
+ ND_PRINT((ndo, "...)"));
+ goto bs_done;
+ }
+ ND_PRINT((ndo, ",prio=%d", bp[2]));
+ bp += 4;
+ }
+ ND_PRINT((ndo, ")"));
+ }
+ bs_done:
+ break;
+ }
+ case PIMV2_TYPE_ASSERT:
+ bp += 4; len -= 4;
+ if (bp >= ep)
+ break;
+ ND_PRINT((ndo, " group="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance; len -= advance;
+ if (bp >= ep)
+ break;
+ ND_PRINT((ndo, " src="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance; len -= advance;
+ if (bp + 8 > ep)
+ break;
+ if (bp[0] & 0x80)
+ ND_PRINT((ndo, " RPT"));
+ ND_PRINT((ndo, " pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff));
+ ND_PRINT((ndo, " 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;
+ ND_PRINT((ndo, " prefix-cnt=%d", bp[0]));
+ pfxcnt = bp[0];
+ if (bp + 1 >= ep) break;
+ ND_PRINT((ndo, " prio=%d", bp[1]));
+ if (bp + 3 >= ep) break;
+ ND_PRINT((ndo, " holdtime="));
+ relts_print(ndo, EXTRACT_16BITS(&bp[2]));
+ bp += 4;
+
+ /* Encoded-Unicast-RP-Address */
+ if (bp >= ep) break;
+ ND_PRINT((ndo, " RP="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance;
+
+ /* Encoded-Group Addresses */
+ for (i = 0; i < pfxcnt && bp < ep; i++) {
+ ND_PRINT((ndo, " Group%d=", i));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0))
+ < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance;
+ }
+ break;
+ }
+
+ case PIMV2_TYPE_PRUNE_REFRESH:
+ ND_PRINT((ndo, " src="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance;
+ ND_PRINT((ndo, " grp="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_group, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance;
+ ND_PRINT((ndo, " forwarder="));
+ if ((advance = pimv2_addr_print(ndo, bp, pimv2_unicast, 0)) < 0) {
+ ND_PRINT((ndo, "..."));
+ break;
+ }
+ bp += advance;
+ ND_TCHECK2(bp[0], 2);
+ ND_PRINT((ndo, " TUNR "));
+ relts_print(ndo, EXTRACT_16BITS(bp));
+ break;
+
+
+ default:
+ ND_PRINT((ndo, " [type %d]", PIM_TYPE(pim->pim_typever)));
+ break;
+ }
+
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|pim]"));
}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
projects / tcpdump / blobdiff