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Current Path: /usr/src/contrib/tcpdump

📁 ..
📄 CHANGES(57.87 KB)
📄 CONTRIBUTING(5.93 KB)
📄 CREDITS(14.57 KB)
📄 INSTALL.txt(5.25 KB)
📄 LICENSE(873 B)
📄 Makefile-devel-adds(614 B)
📄 Makefile.in(9.96 KB)
📄 PLATFORMS(567 B)
📄 README(9.04 KB)
📄 README.md(9.04 KB)
📄 VERSION(6 B)
📄 addrtoname.c(33.19 KB)
📄 addrtoname.h(2.78 KB)
📄 addrtostr.c(5.64 KB)
📄 addrtostr.h(2.03 KB)
📄 af.c(1.96 KB)
📄 af.h(1.81 KB)
📄 ah.h(2.34 KB)
📄 appletalk.h(4.06 KB)
📄 ascii_strcasecmp.c(3.5 KB)
📄 ascii_strcasecmp.h(1.49 KB)
📄 atime.awk(529 B)
📄 atm.h(1.14 KB)
📄 bpf_dump.c(1.9 KB)
📄 chdlc.h(1.31 KB)
📄 checksum.c(5.25 KB)
📄 config.guess(43.17 KB)
📄 config.h.in(11.19 KB)
📄 config.sub(34.93 KB)
📄 configure(255.88 KB)
📄 configure.ac(25.05 KB)
📄 configure.in(25.66 KB)
📄 cpack.c(3.92 KB)
📄 cpack.h(2.37 KB)
📄 ether.h(2.34 KB)
📄 ethertype.h(5.58 KB)
📄 extract.h(11.48 KB)
📄 funcattrs.h(4.42 KB)
📄 getopt_long.h(2.52 KB)
📄 gmpls.c(5.82 KB)
📄 gmpls.h(1.38 KB)
📄 gmt2local.c(2.01 KB)
📄 gmt2local.h(1.21 KB)
📄 in_cksum.c(6.44 KB)
📄 install-sh(5.45 KB)
📄 interface.h(2.29 KB)
📄 ip.h(5.75 KB)
📄 ip6.h(7.6 KB)
📄 ipproto.c(16.49 KB)
📄 ipproto.h(4.72 KB)
📄 l2vpn.c(3.36 KB)
📄 l2vpn.h(781 B)
📁 lbl
📄 llc.h(3.72 KB)
📄 machdep.c(2.58 KB)
📄 machdep.h(1.24 KB)
📄 makemib(6.41 KB)
📄 mib.h(26.33 KB)
📁 missing
📄 mkdep(2.43 KB)
📄 mpls.h(1.93 KB)
📄 nameser.h(10.8 KB)
📄 netdissect-stdinc.h(9.93 KB)
📄 netdissect.c(3.38 KB)
📄 netdissect.h(30.13 KB)
📄 nfs.h(13.37 KB)
📄 nfsfh.h(2.57 KB)
📄 nlpid.c(1.27 KB)
📄 nlpid.h(1.3 KB)
📄 openflow.h(2.14 KB)
📄 ospf.h(10.21 KB)
📄 oui.c(3.83 KB)
📄 oui.h(4.06 KB)
📄 packetdat.awk(1.39 KB)
📄 parsenfsfh.c(12.87 KB)
📄 pcap-missing.h(1.8 KB)
📄 pcap_dump_ftell.c(1.29 KB)
📄 ppp.h(3.07 KB)
📄 print-802_11.c(91.47 KB)
📄 print-802_15_4.c(5.5 KB)
📄 print-ah.c(2.02 KB)
📄 print-ahcp.c(10.73 KB)
📄 print-aodv.c(15.98 KB)
📄 print-aoe.c(11.13 KB)
📄 print-ap1394.c(4 KB)
📄 print-arcnet.c(8.83 KB)
📄 print-arp.c(14.57 KB)
📄 print-ascii.c(6.23 KB)
📄 print-atalk.c(16.76 KB)
📄 print-atm.c(16.81 KB)
📄 print-babel.c(23.79 KB)
📄 print-beep.c(1.71 KB)
📄 print-bfd.c(16.5 KB)
📄 print-bgp.c(99.77 KB)
📄 print-bootp.c(30.07 KB)
📄 print-bt.c(2.21 KB)
📄 print-calm-fast.c(1.81 KB)
📄 print-carp.c(2.43 KB)
📄 print-cdp.c(11.16 KB)
📄 print-cfm.c(24.19 KB)
📄 print-chdlc.c(5.88 KB)
📄 print-cip.c(2.5 KB)
📄 print-cnfp.c(13.69 KB)
📄 print-dccp.c(17.75 KB)
📄 print-decnet.c(37.63 KB)
📄 print-dhcp6.c(23.22 KB)
📄 print-domain.c(18.44 KB)
📄 print-dtp.c(3.03 KB)
📄 print-dvmrp.c(8.98 KB)
📄 print-eap.c(9.26 KB)
📄 print-egp.c(8.69 KB)
📄 print-eigrp.c(19.49 KB)
📄 print-enc.c(4.2 KB)
📄 print-esp.c(21.46 KB)
📄 print-ether.c(12.91 KB)
📄 print-fddi.c(10.51 KB)
📄 print-forces.c(45.01 KB)
📄 print-fr.c(31.99 KB)
📄 print-frag6.c(2.36 KB)
📄 print-ftp.c(973 B)
📄 print-geneve.c(6.13 KB)
📄 print-geonet.c(6.72 KB)
📄 print-gre.c(9.72 KB)
📄 print-hncp.c(26.39 KB)
📄 print-hsrp.c(4.57 KB)
📄 print-http.c(1.51 KB)
📄 print-icmp.c(22.7 KB)
📄 print-icmp6.c(59.81 KB)
📄 print-igmp.c(10.05 KB)
📄 print-igrp.c(4.64 KB)
📄 print-ip.c(17.04 KB)
📄 print-ip6.c(10.57 KB)
📄 print-ip6opts.c(5.53 KB)
📄 print-ipcomp.c(2.32 KB)
📄 print-ipfc.c(4.41 KB)
📄 print-ipnet.c(2.78 KB)
📄 print-ipx.c(6.42 KB)
📄 print-isakmp.c(81.72 KB)
📄 print-isoclns.c(107.61 KB)
📄 print-juniper.c(48.42 KB)
📄 print-krb.c(6.26 KB)
📄 print-l2tp.c(23.94 KB)
📄 print-lane.c(3.04 KB)
📄 print-ldp.c(24.35 KB)
📄 print-lisp.c(15.23 KB)
📄 print-llc.c(16.68 KB)
📄 print-lldp.c(57.26 KB)
📄 print-lmp.c(38.11 KB)
📄 print-loopback.c(3.63 KB)
📄 print-lspping.c(51.64 KB)
📄 print-lwapp.c(13.01 KB)
📄 print-lwres.c(14.08 KB)
📄 print-m3ua.c(10.92 KB)
📄 print-medsa.c(5.57 KB)
📄 print-mobile.c(3.28 KB)
📄 print-mobility.c(9.74 KB)
📄 print-mpcp.c(7.87 KB)
📄 print-mpls.c(5.31 KB)
📄 print-mptcp.c(13.68 KB)
📄 print-msdp.c(2.69 KB)
📄 print-msnlb.c(2.39 KB)
📄 print-nflog.c(4.4 KB)
📄 print-nfs.c(42.84 KB)
📄 print-nsh.c(5.39 KB)
📄 print-ntp.c(13.34 KB)
📄 print-null.c(4.01 KB)
📄 print-olsr.c(23.42 KB)
📄 print-openflow-1.0.c(76.63 KB)
📄 print-openflow.c(4.77 KB)
📄 print-ospf.c(39.49 KB)
📄 print-ospf6.c(29.86 KB)
📄 print-otv.c(2.1 KB)
📄 print-pflog.c(4.86 KB)
📄 print-pfsync.c(12.53 KB)
📄 print-pgm.c(22.17 KB)
📄 print-pim.c(32.59 KB)
📄 print-pktap.c(5.18 KB)
📄 print-ppi.c(2.68 KB)
📄 print-ppp.c(46.16 KB)
📄 print-pppoe.c(5.65 KB)
📄 print-pptp.c(25.9 KB)
📄 print-radius.c(35.1 KB)
📄 print-raw.c(1.52 KB)
📄 print-resp.c(16.5 KB)
📄 print-rip.c(9.19 KB)
📄 print-ripng.c(6 KB)
📄 print-rpki-rtr.c(10.83 KB)
📄 print-rrcp.c(4.56 KB)
📄 print-rsvp.c(78.61 KB)
📄 print-rt6.c(2.66 KB)
📄 print-rtsp.c(1.16 KB)
📄 print-rx.c(66.92 KB)
📄 print-sctp.c(23.13 KB)
📄 print-sflow.c(31.91 KB)
📄 print-sip.c(1.29 KB)
📄 print-sl.c(6.95 KB)
📄 print-sll.c(9.2 KB)
📄 print-slow.c(25.17 KB)
📄 print-smb.c(43.19 KB)
📄 print-smtp.c(983 B)
📄 print-snmp.c(43.17 KB)
📄 print-stp.c(17.18 KB)
📄 print-sunatm.c(3.27 KB)
📄 print-sunrpc.c(7.85 KB)
📄 print-symantec.c(3.78 KB)
📄 print-syslog.c(3.96 KB)
📄 print-tcp.c(35.84 KB)
📄 print-telnet.c(15.02 KB)
📄 print-tftp.c(5.2 KB)
📄 print-timed.c(4.74 KB)
📄 print-tipc.c(11.53 KB)
📄 print-token.c(7.96 KB)
📄 print-udld.c(5.47 KB)
📄 print-udp.c(21.28 KB)
📄 print-usb.c(4.18 KB)
📄 print-vjc.c(4.45 KB)
📄 print-vqp.c(6.8 KB)
📄 print-vrrp.c(6.37 KB)
📄 print-vtp.c(13.56 KB)
📄 print-vxlan-gpe.c(3.46 KB)
📄 print-vxlan.c(2.21 KB)
📄 print-wb.c(10.93 KB)
📄 print-zephyr.c(8.03 KB)
📄 print-zeromq.c(7.5 KB)
📄 print.c(11.54 KB)
📄 print.h(1.78 KB)
📄 rpc_auth.h(2.77 KB)
📄 rpc_msg.h(3.19 KB)
📄 rpl.h(4.88 KB)
📄 send-ack.awk(1.56 KB)
📄 setsignal.c(3.27 KB)
📄 setsignal.h(1.24 KB)
📄 signature.c(5.58 KB)
📄 signature.h(1.12 KB)
📄 slcompress.h(3.55 KB)
📄 smb.h(5.38 KB)
📄 smbutil.c(63.88 KB)
📄 stime.awk(567 B)
📄 strtoaddr.c(5.34 KB)
📄 strtoaddr.h(992 B)
📄 tcp.h(5.02 KB)
📄 tcpdump.1.in(60.82 KB)
📄 tcpdump.c(69.76 KB)
📄 timeval-operations.h(3.19 KB)
📄 udp.h(8.25 KB)
📄 util-print.c(23.75 KB)
📄 vfprintf.c(1.62 KB)

Editing: print-cdp.c

/*
 * Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
 *	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.
 *
 * Code by Gert Doering, SpaceNet GmbH, gert@space.net
 *
 * Reference documentation:
 *    http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm
 */

/* \summary: Cisco Discovery Protocol (CDP) printer */

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

#include <netdissect-stdinc.h>

#include <string.h>

#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
#include "nlpid.h"

static const char tstr[] = "[|cdp]";

#define CDP_HEADER_LEN             4
#define CDP_HEADER_VERSION_OFFSET  0
#define CDP_HEADER_TTL_OFFSET      1
#define CDP_HEADER_CHECKSUM_OFFSET 2

#define CDP_TLV_HEADER_LEN  4
#define CDP_TLV_TYPE_OFFSET 0
#define CDP_TLV_LEN_OFFSET  2

static const struct tok cdp_tlv_values[] = {
    { 0x01,             "Device-ID"},
    { 0x02,             "Address"},
    { 0x03,             "Port-ID"},
    { 0x04,             "Capability"},
    { 0x05,             "Version String"},
    { 0x06,             "Platform"},
    { 0x07,             "Prefixes"},
    { 0x08,             "Protocol-Hello option"},
    { 0x09,             "VTP Management Domain"},
    { 0x0a,             "Native VLAN ID"},
    { 0x0b,             "Duplex"},
    { 0x0e,             "ATA-186 VoIP VLAN request"},
    { 0x0f,             "ATA-186 VoIP VLAN assignment"},
    { 0x10,             "power consumption"},
    { 0x11,             "MTU"},
    { 0x12,             "AVVID trust bitmap"},
    { 0x13,             "AVVID untrusted ports CoS"},
    { 0x14,             "System Name"},
    { 0x15,             "System Object ID (not decoded)"},
    { 0x16,             "Management Addresses"},
    { 0x17,             "Physical Location"},
    { 0, NULL}
};

static const struct tok cdp_capability_values[] = {
    { 0x01,             "Router" },
    { 0x02,             "Transparent Bridge" },
    { 0x04,             "Source Route Bridge" },
    { 0x08,             "L2 Switch" },
    { 0x10,             "L3 capable" },
    { 0x20,             "IGMP snooping" },
    { 0x40,             "L1 capable" },
    { 0, NULL }
};

static int cdp_print_addr(netdissect_options *, const u_char *, int);
static int cdp_print_prefixes(netdissect_options *, const u_char *, int);
static unsigned long cdp_get_number(const u_char *, int);

void
cdp_print(netdissect_options *ndo,
          const u_char *pptr, u_int length, u_int caplen)
{
	int type, len, i, j;
	const u_char *tptr;

if (caplen < CDP_HEADER_LEN) {
		ND_PRINT((ndo, "%s", tstr));
		return;
	}

tptr = pptr; /* temporary pointer */

ND_TCHECK2(*tptr, CDP_HEADER_LEN);
	ND_PRINT((ndo, "CDPv%u, ttl: %us", *(tptr + CDP_HEADER_VERSION_OFFSET),
					   *(tptr + CDP_HEADER_TTL_OFFSET)));
	if (ndo->ndo_vflag)
		ND_PRINT((ndo, ", checksum: 0x%04x (unverified), length %u", EXTRACT_16BITS(tptr+CDP_HEADER_CHECKSUM_OFFSET), length));
	tptr += CDP_HEADER_LEN;

while (tptr < (pptr+length)) {
		ND_TCHECK2(*tptr, CDP_TLV_HEADER_LEN); /* read out Type and Length */
		type = EXTRACT_16BITS(tptr+CDP_TLV_TYPE_OFFSET);
		len  = EXTRACT_16BITS(tptr+CDP_TLV_LEN_OFFSET); /* object length includes the 4 bytes header length */
		if (len < CDP_TLV_HEADER_LEN) {
		    if (ndo->ndo_vflag)
			ND_PRINT((ndo, "\n\t%s (0x%02x), TLV length: %u byte%s (too short)",
			       tok2str(cdp_tlv_values,"unknown field type", type),
			       type,
			       len,
			       PLURAL_SUFFIX(len))); /* plural */
		    else
			ND_PRINT((ndo, ", %s TLV length %u too short",
			       tok2str(cdp_tlv_values,"unknown field type", type),
			       len));
		    break;
		}
		tptr += CDP_TLV_HEADER_LEN;
		len -= CDP_TLV_HEADER_LEN;

ND_TCHECK2(*tptr, len);

if (ndo->ndo_vflag || type == 1) { /* in non-verbose mode just print Device-ID */

if (ndo->ndo_vflag)
			ND_PRINT((ndo, "\n\t%s (0x%02x), value length: %u byte%s: ",
			       tok2str(cdp_tlv_values,"unknown field type", type),
			       type,
			       len,
			       PLURAL_SUFFIX(len))); /* plural */

switch (type) {

case 0x01: /* Device-ID */
			if (!ndo->ndo_vflag)
			    ND_PRINT((ndo, ", Device-ID "));
			ND_PRINT((ndo, "'"));
			(void)fn_printn(ndo, tptr, len, NULL);
			ND_PRINT((ndo, "'"));
			break;
		    case 0x02: /* Address */
			if (cdp_print_addr(ndo, tptr, len) < 0)
			    goto trunc;
			break;
		    case 0x03: /* Port-ID */
			ND_PRINT((ndo, "'"));
			(void)fn_printn(ndo, tptr, len, NULL);
			ND_PRINT((ndo, "'"));
			break;
		    case 0x04: /* Capabilities */
			if (len < 4)
			    goto trunc;
			ND_PRINT((ndo, "(0x%08x): %s",
			       EXTRACT_32BITS(tptr),
			       bittok2str(cdp_capability_values, "none", EXTRACT_32BITS(tptr))));
			break;
		    case 0x05: /* Version */
			ND_PRINT((ndo, "\n\t  "));
			for (i=0;i<len;i++) {
			    j = *(tptr+i);
			    if (j == '\n') /* lets rework the version string to
					      get a nice indentation */
				ND_PRINT((ndo, "\n\t  "));
			    else
				fn_print_char(ndo, j);
			}
			break;
		    case 0x06: /* Platform */
			ND_PRINT((ndo, "'"));
			(void)fn_printn(ndo, tptr, len, NULL);
			ND_PRINT((ndo, "'"));
			break;
		    case 0x07: /* Prefixes */
			if (cdp_print_prefixes(ndo, tptr, len) < 0)
			    goto trunc;
			break;
		    case 0x08: /* Protocol Hello Option - not documented */
			break;
		    case 0x09: /* VTP Mgmt Domain  - CDPv2 */
			ND_PRINT((ndo, "'"));
			(void)fn_printn(ndo, tptr, len, NULL);
			ND_PRINT((ndo, "'"));
			break;
		    case 0x0a: /* Native VLAN ID - CDPv2 */
			if (len < 2)
			    goto trunc;
			ND_PRINT((ndo, "%d", EXTRACT_16BITS(tptr)));
			break;
		    case 0x0b: /* Duplex - CDPv2 */
			if (len < 1)
			    goto trunc;
			ND_PRINT((ndo, "%s", *(tptr) ? "full": "half"));
			break;

/* http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cata/186/2_12_m/english/release/notes/186rn21m.html
		     * plus more details from other sources
		     */
		    case 0x0e: /* ATA-186 VoIP VLAN request - incomplete doc. */
			if (len < 3)
			    goto trunc;
			ND_PRINT((ndo, "app %d, vlan %d", *(tptr), EXTRACT_16BITS(tptr + 1)));
			break;
		    case 0x10: /* ATA-186 VoIP VLAN assignment - incomplete doc. */
			ND_PRINT((ndo, "%1.2fW", cdp_get_number(tptr, len) / 1000.0));
			break;
		    case 0x11: /* MTU - not documented */
			if (len < 4)
			    goto trunc;
			ND_PRINT((ndo, "%u bytes", EXTRACT_32BITS(tptr)));
			break;
		    case 0x12: /* AVVID trust bitmap - not documented */
			if (len < 1)
			    goto trunc;
			ND_PRINT((ndo, "0x%02x", *(tptr)));
			break;
		    case 0x13: /* AVVID untrusted port CoS - not documented */
			if (len < 1)
			    goto trunc;
			ND_PRINT((ndo, "0x%02x", *(tptr)));
			break;
		    case 0x14: /* System Name - not documented */
			ND_PRINT((ndo, "'"));
			(void)fn_printn(ndo, tptr, len, NULL);
			ND_PRINT((ndo, "'"));
			break;
		    case 0x16: /* System Object ID - not documented */
			if (cdp_print_addr(ndo, tptr, len) < 0)
				goto trunc;
			break;
		    case 0x17: /* Physical Location - not documented */
			if (len < 1)
			    goto trunc;
			ND_PRINT((ndo, "0x%02x", *(tptr)));
			if (len > 1) {
				ND_PRINT((ndo, "/"));
				(void)fn_printn(ndo, tptr + 1, len - 1, NULL);
			}
			break;
		    default:
			print_unknown_data(ndo, tptr, "\n\t  ", len);
			break;
		    }
		}
		tptr = tptr+len;
	}
	if (ndo->ndo_vflag < 1)
	    ND_PRINT((ndo, ", length %u", caplen));

return;
trunc:
	ND_PRINT((ndo, "%s", tstr));
}

/*
 * Protocol type values.
 *
 * PT_NLPID means that the protocol type field contains an OSI NLPID.
 *
 * PT_IEEE_802_2 means that the protocol type field contains an IEEE 802.2
 * LLC header that specifies that the payload is for that protocol.
 */
#define PT_NLPID		1	/* OSI NLPID */
#define PT_IEEE_802_2		2	/* IEEE 802.2 LLC header */

static int
cdp_print_addr(netdissect_options *ndo,
	       const u_char * p, int l)
{
	int pt, pl, al, num;
	const u_char *endp = p + l;
	static const u_char prot_ipv6[] = {
		0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x86, 0xdd
	};

ND_TCHECK2(*p, 4);
	if (p + 4 > endp)
		goto trunc;
	num = EXTRACT_32BITS(p);
	p += 4;

while (p < endp && num >= 0) {
		ND_TCHECK2(*p, 2);
		if (p + 2 > endp)
			goto trunc;
		pt = p[0];		/* type of "protocol" field */
		pl = p[1];		/* length of "protocol" field */
		p += 2;

ND_TCHECK2(p[pl], 2);
		if (p + pl + 2 > endp)
			goto trunc;
		al = EXTRACT_16BITS(&p[pl]);	/* address length */

if (pt == PT_NLPID && pl == 1 && *p == NLPID_IP && al == 4) {
			/*
			 * IPv4: protocol type = NLPID, protocol length = 1
			 * (1-byte NLPID), protocol = 0xcc (NLPID for IPv4),
			 * address length = 4
			 */
			p += 3;

ND_TCHECK2(*p, 4);
			if (p + 4 > endp)
				goto trunc;
			ND_PRINT((ndo, "IPv4 (%u) %s", num, ipaddr_string(ndo, p)));
			p += 4;
		}
		else if (pt == PT_IEEE_802_2 && pl == 8 &&
		    memcmp(p, prot_ipv6, 8) == 0 && al == 16) {
			/*
			 * IPv6: protocol type = IEEE 802.2 header,
			 * protocol length = 8 (size of LLC+SNAP header),
			 * protocol = LLC+SNAP header with the IPv6
			 * Ethertype, address length = 16
			 */
			p += 10;
			ND_TCHECK2(*p, al);
			if (p + al > endp)
				goto trunc;

ND_PRINT((ndo, "IPv6 (%u) %s", num, ip6addr_string(ndo, p)));
			p += al;
		}
		else {
			/*
			 * Generic case: just print raw data
			 */
			ND_TCHECK2(*p, pl);
			if (p + pl > endp)
				goto trunc;
			ND_PRINT((ndo, "pt=0x%02x, pl=%d, pb=", *(p - 2), pl));
			while (pl-- > 0)
				ND_PRINT((ndo, " %02x", *p++));
			ND_TCHECK2(*p, 2);
			if (p + 2 > endp)
				goto trunc;
			al = (*p << 8) + *(p + 1);
			ND_PRINT((ndo, ", al=%d, a=", al));
			p += 2;
			ND_TCHECK2(*p, al);
			if (p + al > endp)
				goto trunc;
			while (al-- > 0)
				ND_PRINT((ndo, " %02x", *p++));
		}
		num--;
		if (num)
			ND_PRINT((ndo, " "));
	}

return 0;

trunc:
	return -1;
}

static int
cdp_print_prefixes(netdissect_options *ndo,
		   const u_char * p, int l)
{
	if (l % 5)
		goto trunc;

ND_PRINT((ndo, " IPv4 Prefixes (%d):", l / 5));

while (l > 0) {
		ND_PRINT((ndo, " %u.%u.%u.%u/%u", p[0], p[1], p[2], p[3], p[4]));
		l -= 5;
		p += 5;
	}

return 0;

trunc:
	return -1;
}

/* read in a <n>-byte number, MSB first
 * (of course this can handle max sizeof(long))
 */
static unsigned long cdp_get_number(const u_char * p, int l)
{
    unsigned long res=0;
    while( l>0 )
    {
	res = (res<<8) + *p;
	p++; l--;
    }
    return res;
}

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