* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-pim.c,v 1.12 1999-11-17 14:58:13 itojun Exp $ (LBL)";
+/* \summary: Protocol Independent Multicast (PIM) printer */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
+#include <netdissect-stdinc.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+#include "ip.h"
+#include "ip6.h"
+#include "ipproto.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
-#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>
+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...
*/
-#ifdef INET6
-#include <netinet6/pim6.h>
-#else
+
struct pim {
-#if defined(WORDS_BIGENDIAN) || (defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN))
- u_int pim_type:4, /* 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
- */
- pim_ver:4; /* PIM version number; 2 for PIMv2 */
-#else
- u_int pim_ver:4, /* PIM version */
- pim_type:4; /* PIM type */
-#endif
+ 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 */
};
-#endif
+static void pimv2_print(netdissect_options *, register const u_char *bp, register u_int len, const u_char *);
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
+static void
+pimv1_join_prune_print(netdissect_options *ndo,
+ register const u_char *bp, register u_int len)
+{
+ int ngroups, njoin, nprune;
+ int njp;
-#include "interface.h"
-#include "addrtoname.h"
+ /* 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;
-static void pimv2_print(register const u_char *bp, register u_int len);
+ ND_PRINT((ndo, " RPF %s ", ipaddr_string(ndo, bp)));
+ hold = EXTRACT_16BITS(&bp[6]);
+ if (hold != 180) {
+ ND_PRINT((ndo, "Hold "));
+ unsigned_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;
+ }
+
+ if (len < sizeof(struct in_addr))
+ goto trunc;
+ 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)));
+ bp += 4;
+ len -= 4;
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(bp[2], 2);
+ if (ndo->ndo_vflag > 1)
+ ND_PRINT((ndo, "\n"));
+ ND_PRINT((ndo, " Hold time: "));
+ unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2]));
+ if (ndo->ndo_vflag < 2)
+ return;
+ bp += 4;
+ len -= 4;
+
+ if (len < 4)
+ goto trunc;
+ 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"?
+ */
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(bp[0], sizeof(struct in_addr));
+ ND_PRINT((ndo, "\n\tGroup: %s", ipaddr_string(ndo, bp)));
+ bp += 4;
+ len -= 4;
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(bp[0], sizeof(struct in_addr));
+ if (EXTRACT_32BITS(&bp[0]) != 0xffffffff)
+ ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[0])));
+ bp += 4;
+ len -= 4;
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(bp[0], 4);
+ njoin = EXTRACT_16BITS(&bp[0]);
+ nprune = EXTRACT_16BITS(&bp[2]);
+ ND_PRINT((ndo, " joined: %d pruned: %d", njoin, nprune));
+ bp += 4;
+ len -= 4;
+ for (njp = 0; njp < (njoin + nprune); njp++) {
+ const char *type;
+
+ if (njp < njoin)
+ type = "Join ";
+ else
+ type = "Prune";
+ if (len < 6)
+ goto trunc;
+ 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
-igmp_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 u_char type;
+
+ 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 "));
+ unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[10]));
+ ND_PRINT((ndo, ")"));
+ }
+ break;
- ep = (const u_char *)snapend;
- if (bp >= ep)
+ 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])));
+ unsigned_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) {
+ if (len < 8)
+ goto trunc;
+ pimv1_join_prune_print(ndo, &bp[8], len - 8);
+ }
+ break;
+ }
+ ND_TCHECK(bp[4]);
+ if ((bp[4] >> 4) != 1)
+ ND_PRINT((ndo, " [v%d]", bp[4] >> 4));
return;
- type = bp[1];
+trunc:
+ ND_PRINT((ndo, "[|pim]"));
+ return;
+}
- switch (type) {
- case 0:
- (void)printf(" Query");
- break;
+/*
+ * 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;
- case 1:
- (void)printf(" Register");
- break;
+ if (len < 8)
+ goto trunc;
+ 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;
+ }
- case 2:
- (void)printf(" Register-Stop");
- break;
+ ND_TCHECK(bp[1]);
+ numrps = bp[1];
- case 3:
- (void)printf(" Join/Prune");
- break;
+ ND_TCHECK2(bp[2], 2);
+ ND_PRINT((ndo, " Hold "));
+ hold = EXTRACT_16BITS(&bp[2]);
+ if (hold)
+ unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2]));
+ else
+ ND_PRINT((ndo, "FOREVER"));
- case 4:
- (void)printf(" RP-reachable");
- break;
+ /* Next 4 bytes are reserved. */
- case 5:
- (void)printf(" Assert");
- break;
+ bp += 8; len -= 8;
- case 6:
- (void)printf(" Graft");
- break;
+ /*XXX skip unless -v? */
- case 7:
- (void)printf(" Graft-ACK");
- break;
+ /*
+ * 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;
- case 8:
- (void)printf(" Mode");
- break;
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(bp[0], 4);
+ ND_PRINT((ndo, " RP %s", ipaddr_string(ndo, bp)));
+ bp += 4;
+ len -= 4;
+ if (len < 1)
+ goto trunc;
+ ND_TCHECK(bp[0]);
+ switch (bp[0] & 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[0] & 0xfc)
+ ND_PRINT((ndo, " [rsvd=0x%02x]", bp[0] & 0xfc));
+ bp += 1;
+ len -= 1;
+ if (len < 1)
+ goto trunc;
+ ND_TCHECK(bp[0]);
+ nentries = bp[0];
+ bp += 1;
+ len -= 1;
+ s = ' ';
+ for (; nentries; nentries--) {
+ if (len < 6)
+ goto trunc;
+ 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;
- default:
- (void)printf(" [type %d]", type);
- break;
- }
+trunc:
+ ND_PRINT((ndo, "[|autorp]"));
+ return;
}
void
-pim_print(register const u_char *bp, register u_int len)
+pim_print(netdissect_options *ndo,
+ register const u_char *bp, register u_int len, const u_char *bp2)
{
- register const u_char *ep;
- register struct pim *pim = (struct pim *)bp;
+ register const struct pim *pim = (const 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);
+ ND_TCHECK(pim->pim_rsv);
#endif
- switch(pim->pim_ver) {
- case 2: /* avoid hardcoding? */
- (void)printf("v2");
- pimv2_print(bp, len);
+ ND_TCHECK(pim->pim_typever);
+ 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, bp2);
+ }
break;
- default:
- (void)printf("v%d", pim->pim_ver);
+ default:
+ ND_PRINT((ndo, "PIMv%u, length %u",
+ PIM_VER(pim->pim_typever),
+ len));
break;
}
return;
+
+trunc:
+ ND_PRINT((ndo, "[|pim]"));
+ 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.
+ *
+ */
+
enum pimv2_addrtype {
pimv2_unicast, pimv2_group, pimv2_source
};
-#if 0
-static char *addrtypestr[] = {
- "unicast", "group", "source"
-};
-#endif
+/* 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)
+pimv2_addr_print(netdissect_options *ndo,
+ const u_char *bp, u_int len, enum pimv2_addrtype at,
+ u_int addr_len, int silent)
{
- const u_char *ep;
int af;
- char *afstr;
- int len;
-
- ep = (const u_char *)snapend;
- if (bp >= ep)
- return -1;
+ int hdrlen;
- switch (bp[0]) {
- case 1:
- af = AF_INET;
- afstr = "IPv4";
- break;
-#ifdef INET6
- case 2:
- af = AF_INET6;
- afstr = "IPv6";
- break;
-#endif
- default:
- return -1;
+ if (addr_len == 0) {
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK(bp[1]);
+ switch (bp[0]) {
+ case 1:
+ af = AF_INET;
+ addr_len = (u_int)sizeof(struct in_addr);
+ break;
+ case 2:
+ af = AF_INET6;
+ addr_len = (u_int)sizeof(struct in6_addr);
+ break;
+ default:
+ return -1;
+ }
+ if (bp[1] != 0)
+ return -1;
+ hdrlen = 2;
+ } else {
+ switch (addr_len) {
+ case sizeof(struct in_addr):
+ af = AF_INET;
+ break;
+ case sizeof(struct in6_addr):
+ af = AF_INET6;
+ break;
+ default:
+ return -1;
+ break;
+ }
+ hdrlen = 0;
}
- if (bp[1] != 0)
- return -1;
-
+ bp += hdrlen;
+ len -= hdrlen;
switch (at) {
- case pimv2_unicast:
+ case pimv2_unicast:
+ if (len < addr_len)
+ goto trunc;
+ ND_TCHECK2(bp[0], addr_len);
if (af == AF_INET) {
- len = 4;
- if (bp + 2 + len > ep)
- return -1;
if (!silent)
- (void)printf("%s", ipaddr_string(bp + 2));
+ ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp)));
}
-#ifdef INET6
else if (af == AF_INET6) {
- len = 16;
- if (bp + 2 + len > ep)
- return -1;
if (!silent)
- (void)printf("%s", ip6addr_string(bp + 2));
+ ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp)));
}
-#endif
- return 2 + len;
- case pimv2_group:
+ return hdrlen + addr_len;
+ case pimv2_group:
+ case pimv2_source:
+ if (len < addr_len + 2)
+ goto trunc;
+ ND_TCHECK2(bp[0], addr_len + 2);
if (af == AF_INET) {
- len = 4;
- if (bp + 4 + len > ep)
- return -1;
- if (!silent)
- (void)printf("%s/%u", ipaddr_string(bp + 4), bp[3]);
- }
-#ifdef INET6
- else if (af == AF_INET6) {
- len = 16;
- if (bp + 4 + len > ep)
- return -1;
- if (!silent)
- (void)printf("%s/%u", ip6addr_string(bp + 4), bp[3]);
- }
-#endif
- return 4 + len;
- case pimv2_source:
- if (af == AF_INET) {
- len = 4;
- if (bp + 4 + len > ep)
- return -1;
- if (!silent)
- (void)printf("%s/%u", ipaddr_string(bp + 4), bp[3]);
+ 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) {
- len = 16;
- if (bp + 4 + len > ep)
- return -1;
- if (!silent)
- (void)printf("%s/%u", ip6addr_string(bp + 4), bp[3]);
+ if (!silent) {
+ ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp + 2)));
+ if (bp[1] != 128)
+ ND_PRINT((ndo, "/%u", bp[1]));
+ }
}
-#endif
- if (vflag && bp[2] && !silent) {
- (void)printf("(%s%s%s)",
- bp[2] & 0x04 ? "S" : "",
- bp[2] & 0x02 ? "W" : "",
- bp[2] & 0x01 ? "R" : "");
+ 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 4 + len;
+ return hdrlen + 2 + addr_len;
default:
return -1;
}
+trunc:
+ return -1;
+}
+
+enum checksum_status {
+ CORRECT,
+ INCORRECT,
+ UNVERIFIED
+};
+
+static enum checksum_status
+pimv2_check_checksum(netdissect_options *ndo, const u_char *bp,
+ const u_char *bp2, u_int len)
+{
+ const struct ip *ip;
+ u_int cksum;
+
+ if (!ND_TTEST2(bp[0], len)) {
+ /* We don't have all the data. */
+ return (UNVERIFIED);
+ }
+ ip = (const struct ip *)bp2;
+ if (IP_V(ip) == 4) {
+ struct cksum_vec vec[1];
+
+ vec[0].ptr = bp;
+ vec[0].len = len;
+ cksum = in_cksum(vec, 1);
+ return (cksum ? INCORRECT : CORRECT);
+ } else if (IP_V(ip) == 6) {
+ const struct ip6_hdr *ip6;
+
+ ip6 = (const struct ip6_hdr *)bp2;
+ cksum = nextproto6_cksum(ndo, ip6, bp, len, len, IPPROTO_PIM);
+ return (cksum ? INCORRECT : CORRECT);
+ } else {
+ return (UNVERIFIED);
+ }
}
static void
-pimv2_print(register const u_char *bp, register u_int len)
+pimv2_print(netdissect_options *ndo,
+ register const u_char *bp, register u_int len, const u_char *bp2)
{
- register const u_char *ep;
- register struct pim *pim = (struct pim *)bp;
+ register const struct pim *pim = (const struct pim *)bp;
int advance;
+ enum checksum_status cksum_status;
+ int pimv2_addr_len;
- ep = (const u_char *)snapend;
- if (bp >= ep)
- return;
-#ifdef notyet /* currently we see only version and type */
- TCHECK(pim->pim_rsv);
-#endif
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK(pim->pim_rsv);
+ pimv2_addr_len = pim->pim_rsv;
+ if (pimv2_addr_len != 0)
+ ND_PRINT((ndo, ", RFC2117-encoding"));
+
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK(pim->pim_cksum);
+ ND_PRINT((ndo, ", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum)));
+ if (EXTRACT_16BITS(&pim->pim_cksum) == 0) {
+ ND_PRINT((ndo, "(unverified)"));
+ } else {
+ if (PIM_TYPE(pim->pim_typever) == PIMV2_TYPE_REGISTER) {
+ /*
+ * The checksum only covers the packet header,
+ * not the encapsulated packet.
+ */
+ cksum_status = pimv2_check_checksum(ndo, bp, bp2, 8);
+ if (cksum_status == INCORRECT) {
+ /*
+ * To quote RFC 4601, "For interoperability
+ * reasons, a message carrying a checksum
+ * calculated over the entire PIM Register
+ * message should also be accepted."
+ */
+ cksum_status = pimv2_check_checksum(ndo, bp, bp2, len);
+ }
+ } else {
+ /*
+ * The checksum covers the entire packet.
+ */
+ cksum_status = pimv2_check_checksum(ndo, bp, bp2, len);
+ }
+ switch (cksum_status) {
+
+ case CORRECT:
+ ND_PRINT((ndo, "(correct)"));
+ break;
- switch (pim->pim_type) {
- case 0:
+ case INCORRECT:
+ ND_PRINT((ndo, "(incorrect)"));
+ break;
+
+ case UNVERIFIED:
+ ND_PRINT((ndo, "(unverified)"));
+ break;
+ }
+ }
+ bp += 4;
+ len -= 4;
+
+ switch (PIM_TYPE(pim->pim_typever)) {
+ case PIMV2_TYPE_HELLO:
{
- u_int16_t otype, olen;
- (void)printf(" Hello");
- bp += 4;
- while (bp < ep) {
- otype = ntohs(*(u_int16_t *)(bp + 0));
- olen = ntohs(*(u_int16_t *)(bp + 2));
- if (otype == 1 && olen == 2 && bp + 4 + olen <= ep) {
- u_int16_t value;
- (void)printf(" holdtime=");
- value = ntohs(*(u_int16_t *)(bp + 4));
- if (value == 0xffff)
- (void)printf("infty");
- else
- (void)printf("%u", value);
- bp += 4 + olen;
- } else
+ uint16_t otype, olen;
+ while (len > 0) {
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(bp[0], 4);
+ otype = EXTRACT_16BITS(&bp[0]);
+ olen = EXTRACT_16BITS(&bp[2]);
+ ND_PRINT((ndo, "\n\t %s Option (%u), length %u, Value: ",
+ tok2str(pimv2_hello_option_values, "Unknown", otype),
+ otype,
+ olen));
+ bp += 4;
+ len -= 4;
+
+ if (len < olen)
+ goto trunc;
+ ND_TCHECK2(bp[0], olen);
+ switch (otype) {
+ case PIMV2_HELLO_OPTION_HOLDTIME:
+ if (olen != 2) {
+ ND_PRINT((ndo, "ERROR: Option Length != 2 Bytes (%u)", olen));
+ } else {
+ unsigned_relts_print(ndo, EXTRACT_16BITS(bp));
+ }
+ break;
+
+ 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;
+
+ 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 PIMV2_HELLO_OPTION_GENID:
+ if (olen != 4) {
+ ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen));
+ } else {
+ ND_PRINT((ndo, "0x%08x", EXTRACT_32BITS(bp)));
+ }
+ break;
+
+ case PIMV2_HELLO_OPTION_REFRESH_CAP:
+ if (olen != 4) {
+ ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen));
+ } else {
+ ND_PRINT((ndo, "v%d", *bp));
+ if (*(bp+1) != 0) {
+ ND_PRINT((ndo, ", interval "));
+ unsigned_relts_print(ndo, *(bp+1));
+ }
+ if (EXTRACT_16BITS(bp+2) != 0) {
+ ND_PRINT((ndo, " ?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 (ndo->ndo_vflag > 1) {
+ const u_char *ptr = bp;
+ u_int plen = len;
+ while (ptr < (bp+olen)) {
+ ND_PRINT((ndo, "\n\t "));
+ advance = pimv2_addr_print(ndo, ptr, plen, pimv2_unicast, pimv2_addr_len, 0);
+ if (advance < 0)
+ goto trunc;
+ ptr += advance;
+ plen -= 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;
+ len -= olen;
}
break;
}
- case 1:
- {
- struct ip *ip;
+ case PIMV2_TYPE_REGISTER:
+ {
+ const 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;
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(*bp, PIMV2_REGISTER_FLAG_LEN);
+ ND_PRINT((ndo, ", Flags [ %s ]\n\t",
+ tok2str(pimv2_register_flag_values,
+ "none",
+ EXTRACT_32BITS(bp))));
+
+ bp += 4; len -= 4;
/* encapsulated multicast packet */
- if (bp >= ep)
+ if (len == 0)
+ goto trunc;
+ ip = (const struct ip *)bp;
+ ND_TCHECK(ip->ip_vhl);
+ switch (IP_V(ip)) {
+ case 0: /* Null header */
+ ND_TCHECK(ip->ip_dst);
+ ND_PRINT((ndo, "IP-Null-header %s > %s",
+ ipaddr_string(ndo, &ip->ip_src),
+ ipaddr_string(ndo, &ip->ip_dst)));
break;
- ip = (struct ip *)bp;
- switch(ip->ip_v) {
- case 4: /* IPv4 */
- printf(" ");
- ip_print(bp, len);
+
+ case 4: /* IPv4 */
+ ip_print(ndo, bp, len);
break;
-#ifdef INET6
- case 6: /* IPv6 */
- printf(" ");
- ip6_print(bp, len);
+
+ case 6: /* IPv6 */
+ ip6_print(ndo, bp, len);
break;
-#endif
- default:
- (void)printf(" IP ver %d", ip->ip_v);
+
+ default:
+ ND_PRINT((ndo, "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;
- }
+ case PIMV2_TYPE_REGISTER_STOP:
+ ND_PRINT((ndo, " group="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance; len -= advance;
- if (bp >= ep)
- break;
- (void)printf(" source=");
- if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
- (void)printf("...");
- break;
- }
+ ND_PRINT((ndo, " source="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance; len -= advance;
break;
- case 3:
- case 6:
- case 7:
+ 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;
+ uint8_t ngroup;
+ uint16_t holdtime;
+ uint16_t njoin;
+ uint16_t nprune;
int i, j;
- switch (pim->pim_type) {
- 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->pim_type != 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;
- }
+ if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/
+ ND_PRINT((ndo, ", upstream-neighbor: "));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance; len -= advance;
}
- if (bp + 4 > ep)
- break;
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(*bp, 4);
ngroup = bp[1];
- holdtime = ntohs(*(u_int16_t *)(bp + 2));
- (void)printf(" groups=%u", ngroup);
- if (pim->pim_type != 7) { /*not for Graft-ACK*/
- (void)printf(" holdtime=");
+ 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)
- (void)printf("infty");
+ ND_PRINT((ndo, "infinite"));
else
- (void)printf("%u", holdtime);
+ unsigned_relts_print(ndo, 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;
- }
+ ND_PRINT((ndo, "\n\t group #%u: ", i+1));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance; len -= advance;
- if (bp + 4 > ep) {
- (void)printf("...)");
- goto jp_done;
- }
- njoin = ntohs(*(u_int16_t *)(bp + 0));
- nprune = ntohs(*(u_int16_t *)(bp + 2));
- (void)printf(" join=%u", njoin);
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK2(*bp, 4);
+ 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++) {
- (void)printf(" ");
- if ((advance = pimv2_addr_print(bp, pimv2_source, 0)) < 0) {
- (void)printf("...)");
- goto jp_done;
- }
+ ND_PRINT((ndo, "\n\t joined source #%u: ", j+1));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0)
+ goto trunc;
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;
- }
+ ND_PRINT((ndo, "\n\t pruned source #%u: ", j+1));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance; len -= advance;
}
- (void)printf(")");
}
- jp_done:
break;
}
- case 4:
- {
+ case PIMV2_TYPE_BOOTSTRAP:
+ {
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", ntohs(*(u_int16_t *)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]);
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK_16BITS(bp);
+ ND_PRINT((ndo, " tag=%x", EXTRACT_16BITS(bp)));
bp += 2;
+ len -= 2;
+ if (len < 1)
+ goto trunc;
+ ND_TCHECK(bp[0]);
+ ND_PRINT((ndo, " hashmlen=%d", bp[0]));
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK(bp[2]);
+ ND_PRINT((ndo, " BSRprio=%d", bp[1]));
+ bp += 2;
+ len -= 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;
- }
+ ND_PRINT((ndo, " BSR="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance;
+ len -= advance;
- for (i = 0; bp < ep; i++) {
+ for (i = 0; len > 0; i++) {
/* Encoded-Group Address */
- (void)printf(" (group%d: ", i);
- if ((advance = pimv2_addr_print(bp, pimv2_group, 0))
- < 0) {
- (void)printf("...)");
- goto bs_done;
- }
+ ND_PRINT((ndo, " (group%d: ", i));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance;
+ len -= advance;
/* RP-Count, Frag RP-Cnt, and rsvd */
- if (bp >= ep) {
- (void)printf("...)");
- goto bs_done;
- }
- (void)printf(" RPcnt=%d", frpcnt = bp[0]);
- if (bp + 1 >= ep) {
- (void)printf("...)");
- goto bs_done;
- }
- (void)printf(" FRPcnt=%d", bp[1]);
+ if (len < 1)
+ goto trunc;
+ ND_TCHECK(bp[0]);
+ ND_PRINT((ndo, " RPcnt=%d", bp[0]));
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK(bp[1]);
+ ND_PRINT((ndo, " FRPcnt=%d", frpcnt = bp[1]));
+ if (len < 4)
+ goto trunc;
bp += 4;
+ len -= 4;
- for (j = 0; j < frpcnt && bp < ep; j++) {
+ for (j = 0; j < frpcnt && len > 0; j++) {
/* each RP info */
- (void)printf(" RP%d=", j);
- if ((advance = pimv2_addr_print(bp,
+ ND_PRINT((ndo, " RP%d=", j));
+ if ((advance = pimv2_addr_print(ndo, bp, len,
pimv2_unicast,
- 0)) < 0) {
- (void)printf("...)");
- goto bs_done;
- }
+ pimv2_addr_len,
+ 0)) < 0)
+ goto trunc;
bp += advance;
+ len -= advance;
- if (bp + 1 >= ep) {
- (void)printf("...)");
- goto bs_done;
- }
- (void)printf(",holdtime=%d",
- ntohs(*(u_int16_t *)bp));
- if (bp + 2 >= ep) {
- (void)printf("...)");
- goto bs_done;
- }
- (void)printf(",prio=%d", bp[2]);
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK_16BITS(bp);
+ ND_PRINT((ndo, ",holdtime="));
+ unsigned_relts_print(ndo, EXTRACT_16BITS(bp));
+ if (len < 3)
+ goto trunc;
+ ND_TCHECK(bp[2]);
+ ND_PRINT((ndo, ",prio=%d", bp[2]));
+ if (len < 4)
+ goto trunc;
bp += 4;
+ len -= 4;
}
- (void)printf(")");
+ ND_PRINT((ndo, ")"));
}
- 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;
- }
+ }
+ case PIMV2_TYPE_ASSERT:
+ ND_PRINT((ndo, " group="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance; len -= advance;
- if (bp >= ep)
- break;
- (void)printf(" src=");
- if ((advance = pimv2_addr_print(bp, pimv2_unicast, 0)) < 0) {
- (void)printf("...");
- break;
- }
+ ND_PRINT((ndo, " src="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance; len -= advance;
- if (bp + 8 > ep)
- break;
- if (ntohl(*(u_int32_t *)bp) & 0x80000000)
- (void)printf(" RPT");
- (void)printf(" pref=%u", ntohl(*(u_int32_t *)bp & 0x7fffffff));
- (void)printf(" metric=%u", ntohl(*(u_int32_t *)(bp + 4)));
+ if (len < 8)
+ goto trunc;
+ ND_TCHECK2(*bp, 8);
+ 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 8:
- {
+ case PIMV2_TYPE_CANDIDATE_RP:
+ {
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]);
+ if (len < 1)
+ goto trunc;
+ ND_TCHECK(bp[0]);
+ ND_PRINT((ndo, " prefix-cnt=%d", bp[0]));
pfxcnt = bp[0];
- if (bp + 1 >= ep) break;
- (void)printf(" prio=%d", bp[1]);
- if (bp + 3 >= ep) break;
- (void)printf(" holdtime=%d", ntohs(*(u_int16_t *)(bp + 2)));
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK(bp[1]);
+ ND_PRINT((ndo, " prio=%d", bp[1]));
+ if (len < 4)
+ goto trunc;
+ ND_TCHECK_16BITS(&bp[2]);
+ ND_PRINT((ndo, " holdtime="));
+ unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2]));
bp += 4;
+ len -= 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;
- }
+ ND_PRINT((ndo, " RP="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance;
+ len -= 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;
- }
+ for (i = 0; i < pfxcnt && len > 0; i++) {
+ ND_PRINT((ndo, " Group%d=", i));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
+ goto trunc;
bp += advance;
+ len -= advance;
}
break;
- }
+ }
+
+ case PIMV2_TYPE_PRUNE_REFRESH:
+ ND_PRINT((ndo, " src="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
+ goto trunc;
+ bp += advance;
+ len -= advance;
+ ND_PRINT((ndo, " grp="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0)
+ goto trunc;
+ bp += advance;
+ len -= advance;
+ ND_PRINT((ndo, " forwarder="));
+ if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0)
+ goto trunc;
+ bp += advance;
+ len -= advance;
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK_16BITS(bp);
+ ND_PRINT((ndo, " TUNR "));
+ unsigned_relts_print(ndo, EXTRACT_16BITS(bp));
+ break;
+
default:
- (void)printf(" [type %d]", pim->pim_type);
+ 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