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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-gre.c

/*	$OpenBSD: print-gre.c,v 1.6 2002/10/30 03:04:04 fgsch Exp $	*/

/*
 * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Jason L. Wright
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/* \summary: Generic Routing Encapsulation (GRE) printer */

/*
 * netdissect printer for GRE - Generic Routing Encapsulation
 * RFC1701 (GRE), RFC1702 (GRE IPv4), and RFC2637 (Enhanced GRE)
 */

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

#include <netdissect-stdinc.h>

#include <string.h>

#include "netdissect.h"
#include "addrtostr.h"
#include "extract.h"
#include "ethertype.h"

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

#define	GRE_CP		0x8000		/* checksum present */
#define	GRE_RP		0x4000		/* routing present */
#define	GRE_KP		0x2000		/* key present */
#define	GRE_SP		0x1000		/* sequence# present */
#define	GRE_sP		0x0800		/* source routing */
#define	GRE_RECRS	0x0700		/* recursion count */
#define	GRE_AP		0x0080		/* acknowledgment# present */

static const struct tok gre_flag_values[] = {
    { GRE_CP, "checksum present"},
    { GRE_RP, "routing present"},
    { GRE_KP, "key present"},
    { GRE_SP, "sequence# present"},
    { GRE_sP, "source routing present"},
    { GRE_RECRS, "recursion count"},
    { GRE_AP, "ack present"},
    { 0, NULL }
};

#define	GRE_VERS_MASK	0x0007		/* protocol version */

/* source route entry types */
#define	GRESRE_IP	0x0800		/* IP */
#define	GRESRE_ASN	0xfffe		/* ASN */

static void gre_print_0(netdissect_options *, const u_char *, u_int);
static void gre_print_1(netdissect_options *, const u_char *, u_int);
static int gre_sre_print(netdissect_options *, uint16_t, uint8_t, uint8_t, const u_char *, u_int);
static int gre_sre_ip_print(netdissect_options *, uint8_t, uint8_t, const u_char *, u_int);
static int gre_sre_asn_print(netdissect_options *, uint8_t, uint8_t, const u_char *, u_int);

void
gre_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
	u_int len = length, vers;

ND_TCHECK2(*bp, 2);
	if (len < 2)
		goto trunc;
	vers = EXTRACT_16BITS(bp) & GRE_VERS_MASK;
        ND_PRINT((ndo, "GREv%u",vers));

switch(vers) {
        case 0:
            gre_print_0(ndo, bp, len);
            break;
        case 1:
            gre_print_1(ndo, bp, len);
            break;
	default:
            ND_PRINT((ndo, " ERROR: unknown-version"));
            break;
        }
        return;

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

static void
gre_print_0(netdissect_options *ndo, const u_char *bp, u_int length)
{
	u_int len = length;
	uint16_t flags, prot;

flags = EXTRACT_16BITS(bp);
        if (ndo->ndo_vflag)
            ND_PRINT((ndo, ", Flags [%s]",
                   bittok2str(gre_flag_values,"none",flags)));

len -= 2;
	bp += 2;

ND_TCHECK2(*bp, 2);
	if (len < 2)
		goto trunc;
	prot = EXTRACT_16BITS(bp);
	len -= 2;
	bp += 2;

if ((flags & GRE_CP) | (flags & GRE_RP)) {
		ND_TCHECK2(*bp, 2);
		if (len < 2)
			goto trunc;
		if (ndo->ndo_vflag)
			ND_PRINT((ndo, ", sum 0x%x", EXTRACT_16BITS(bp)));
		bp += 2;
		len -= 2;

ND_TCHECK2(*bp, 2);
		if (len < 2)
			goto trunc;
		ND_PRINT((ndo, ", off 0x%x", EXTRACT_16BITS(bp)));
		bp += 2;
		len -= 2;
	}

if (flags & GRE_KP) {
		ND_TCHECK2(*bp, 4);
		if (len < 4)
			goto trunc;
		ND_PRINT((ndo, ", key=0x%x", EXTRACT_32BITS(bp)));
		bp += 4;
		len -= 4;
	}

if (flags & GRE_SP) {
		ND_TCHECK2(*bp, 4);
		if (len < 4)
			goto trunc;
		ND_PRINT((ndo, ", seq %u", EXTRACT_32BITS(bp)));
		bp += 4;
		len -= 4;
	}

if (flags & GRE_RP) {
		for (;;) {
			uint16_t af;
			uint8_t sreoff;
			uint8_t srelen;

ND_TCHECK2(*bp, 4);
			if (len < 4)
				goto trunc;
			af = EXTRACT_16BITS(bp);
			sreoff = *(bp + 2);
			srelen = *(bp + 3);
			bp += 4;
			len -= 4;

if (af == 0 && srelen == 0)
				break;

if (!gre_sre_print(ndo, af, sreoff, srelen, bp, len))
				goto trunc;

if (len < srelen)
				goto trunc;
			bp += srelen;
			len -= srelen;
		}
	}

if (ndo->ndo_eflag)
            ND_PRINT((ndo, ", proto %s (0x%04x)",
                   tok2str(ethertype_values,"unknown",prot),
                   prot));

ND_PRINT((ndo, ", length %u",length));

if (ndo->ndo_vflag < 1)
            ND_PRINT((ndo, ": ")); /* put in a colon as protocol demarc */
        else
            ND_PRINT((ndo, "\n\t")); /* if verbose go multiline */

switch (prot) {
	case ETHERTYPE_IP:
	        ip_print(ndo, bp, len);
		break;
	case ETHERTYPE_IPV6:
		ip6_print(ndo, bp, len);
		break;
	case ETHERTYPE_MPLS:
		mpls_print(ndo, bp, len);
		break;
	case ETHERTYPE_IPX:
		ipx_print(ndo, bp, len);
		break;
	case ETHERTYPE_ATALK:
		atalk_print(ndo, bp, len);
		break;
	case ETHERTYPE_GRE_ISO:
		isoclns_print(ndo, bp, len);
		break;
	case ETHERTYPE_TEB:
		ether_print(ndo, bp, len, ndo->ndo_snapend - bp, NULL, NULL);
		break;
	default:
		ND_PRINT((ndo, "gre-proto-0x%x", prot));
	}
	return;

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

static void
gre_print_1(netdissect_options *ndo, const u_char *bp, u_int length)
{
	u_int len = length;
	uint16_t flags, prot;

flags = EXTRACT_16BITS(bp);
	len -= 2;
	bp += 2;

if (ndo->ndo_vflag)
            ND_PRINT((ndo, ", Flags [%s]",
                   bittok2str(gre_flag_values,"none",flags)));

ND_TCHECK2(*bp, 2);
	if (len < 2)
		goto trunc;
	prot = EXTRACT_16BITS(bp);
	len -= 2;
	bp += 2;

if (flags & GRE_KP) {
		uint32_t k;

ND_TCHECK2(*bp, 4);
		if (len < 4)
			goto trunc;
		k = EXTRACT_32BITS(bp);
		ND_PRINT((ndo, ", call %d", k & 0xffff));
		len -= 4;
		bp += 4;
	}

if (flags & GRE_SP) {
		ND_TCHECK2(*bp, 4);
		if (len < 4)
			goto trunc;
		ND_PRINT((ndo, ", seq %u", EXTRACT_32BITS(bp)));
		bp += 4;
		len -= 4;
	}

if (flags & GRE_AP) {
		ND_TCHECK2(*bp, 4);
		if (len < 4)
			goto trunc;
		ND_PRINT((ndo, ", ack %u", EXTRACT_32BITS(bp)));
		bp += 4;
		len -= 4;
	}

if ((flags & GRE_SP) == 0)
		ND_PRINT((ndo, ", no-payload"));

if (ndo->ndo_eflag)
            ND_PRINT((ndo, ", proto %s (0x%04x)",
                   tok2str(ethertype_values,"unknown",prot),
                   prot));

ND_PRINT((ndo, ", length %u",length));

if ((flags & GRE_SP) == 0)
            return;

if (ndo->ndo_vflag < 1)
            ND_PRINT((ndo, ": ")); /* put in a colon as protocol demarc */
        else
            ND_PRINT((ndo, "\n\t")); /* if verbose go multiline */

switch (prot) {
	case ETHERTYPE_PPP:
		ppp_print(ndo, bp, len);
		break;
	default:
		ND_PRINT((ndo, "gre-proto-0x%x", prot));
		break;
	}
	return;

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

static int
gre_sre_print(netdissect_options *ndo, uint16_t af, uint8_t sreoff,
    uint8_t srelen, const u_char *bp, u_int len)
{
	int ret;

switch (af) {
	case GRESRE_IP:
		ND_PRINT((ndo, ", (rtaf=ip"));
		ret = gre_sre_ip_print(ndo, sreoff, srelen, bp, len);
		ND_PRINT((ndo, ")"));
		break;
	case GRESRE_ASN:
		ND_PRINT((ndo, ", (rtaf=asn"));
		ret = gre_sre_asn_print(ndo, sreoff, srelen, bp, len);
		ND_PRINT((ndo, ")"));
		break;
	default:
		ND_PRINT((ndo, ", (rtaf=0x%x)", af));
		ret = 1;
	}
	return (ret);
}

static int
gre_sre_ip_print(netdissect_options *ndo, uint8_t sreoff, uint8_t srelen,
                 const u_char *bp, u_int len)
{
	const u_char *up = bp;
	char buf[INET_ADDRSTRLEN];

if (sreoff & 3) {
		ND_PRINT((ndo, ", badoffset=%u", sreoff));
		return (1);
	}
	if (srelen & 3) {
		ND_PRINT((ndo, ", badlength=%u", srelen));
		return (1);
	}
	if (sreoff >= srelen) {
		ND_PRINT((ndo, ", badoff/len=%u/%u", sreoff, srelen));
		return (1);
	}

while (srelen != 0) {
		if (!ND_TTEST2(*bp, 4))
			return (0);
		if (len < 4)
			return (0);

addrtostr(bp, buf, sizeof(buf));
		ND_PRINT((ndo, " %s%s",
		    ((bp - up) == sreoff) ? "*" : "", buf));

bp += 4;
		len -= 4;
		srelen -= 4;
	}
	return (1);
}

static int
gre_sre_asn_print(netdissect_options *ndo, uint8_t sreoff, uint8_t srelen,
                  const u_char *bp, u_int len)
{
	const u_char *up = bp;

if (sreoff & 1) {
		ND_PRINT((ndo, ", badoffset=%u", sreoff));
		return (1);
	}
	if (srelen & 1) {
		ND_PRINT((ndo, ", badlength=%u", srelen));
		return (1);
	}
	if (sreoff >= srelen) {
		ND_PRINT((ndo, ", badoff/len=%u/%u", sreoff, srelen));
		return (1);
	}

while (srelen != 0) {
		if (!ND_TTEST2(*bp, 2))
			return (0);
		if (len < 2)
			return (0);

ND_PRINT((ndo, " %s%x",
		    ((bp - up) == sreoff) ? "*" : "",
		    EXTRACT_16BITS(bp)));

bp += 2;
		len -= 2;
		srelen -= 2;
	}
	return (1);
}

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