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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-ip6.c

/*
 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
 *	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.
 */

/* \summary: IPv6 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 "ip6.h"
#include "ipproto.h"

/*
 * If routing headers are presend and valid, set dst to the final destination.
 * Otherwise, set it to the IPv6 destination.
 *
 * This is used for UDP and TCP pseudo-header in the checksum
 * calculation.
 */
static void
ip6_finddst(netdissect_options *ndo, struct in6_addr *dst,
            const struct ip6_hdr *ip6)
{
	const u_char *cp;
	int advance;
	u_int nh;
	const struct in6_addr *dst_addr;
	const struct ip6_rthdr *dp;
	const struct ip6_rthdr0 *dp0;
	const struct in6_addr *addr;
	int i, len;

cp = (const u_char *)ip6;
	advance = sizeof(struct ip6_hdr);
	nh = ip6->ip6_nxt;
	dst_addr = &ip6->ip6_dst;

while (cp < ndo->ndo_snapend) {
		cp += advance;

switch (nh) {

case IPPROTO_HOPOPTS:
		case IPPROTO_DSTOPTS:
		case IPPROTO_MOBILITY_OLD:
		case IPPROTO_MOBILITY:
			/*
			 * These have a header length byte, following
			 * the next header byte, giving the length of
			 * the header, in units of 8 octets, excluding
			 * the first 8 octets.
			 */
			ND_TCHECK2(*cp, 2);
			advance = (int)((*(cp + 1) + 1) << 3);
			nh = *cp;
			break;

case IPPROTO_FRAGMENT:
			/*
			 * The byte following the next header byte is
			 * marked as reserved, and the header is always
			 * the same size.
			 */
			ND_TCHECK2(*cp, 1);
			advance = sizeof(struct ip6_frag);
			nh = *cp;
			break;

case IPPROTO_ROUTING:
			/*
			 * OK, we found it.
			 */
			dp = (const struct ip6_rthdr *)cp;
			ND_TCHECK(*dp);
			len = dp->ip6r_len;
			switch (dp->ip6r_type) {

case IPV6_RTHDR_TYPE_0:
			case IPV6_RTHDR_TYPE_2:		/* Mobile IPv6 ID-20 */
				dp0 = (const struct ip6_rthdr0 *)dp;
				if (len % 2 == 1)
					goto trunc;
				len >>= 1;
				addr = &dp0->ip6r0_addr[0];
				for (i = 0; i < len; i++) {
					if ((const u_char *)(addr + 1) > ndo->ndo_snapend)
						goto trunc;

dst_addr = addr;
					addr++;
				}
				break;

default:
				break;
			}

/*
			 * Only one routing header to a customer.
			 */
			goto done;

case IPPROTO_AH:
		case IPPROTO_ESP:
		case IPPROTO_IPCOMP:
		default:
			/*
			 * AH and ESP are, in the RFCs that describe them,
			 * described as being "viewed as an end-to-end
			 * payload" "in the IPv6 context, so that they
			 * "should appear after hop-by-hop, routing, and
			 * fragmentation extension headers".  We assume
			 * that's the case, and stop as soon as we see
			 * one.  (We can't handle an ESP header in
			 * the general case anyway, as its length depends
			 * on the encryption algorithm.)
			 *
			 * IPComp is also "viewed as an end-to-end
			 * payload" "in the IPv6 context".
			 *
			 * All other protocols are assumed to be the final
			 * protocol.
			 */
			goto done;
		}
	}

done:
trunc:
	UNALIGNED_MEMCPY(dst, dst_addr, sizeof(struct in6_addr));
}

/*
 * Compute a V6-style checksum by building a pseudoheader.
 */
int
nextproto6_cksum(netdissect_options *ndo,
                 const struct ip6_hdr *ip6, const uint8_t *data,
		 u_int len, u_int covlen, u_int next_proto)
{
        struct {
                struct in6_addr ph_src;
                struct in6_addr ph_dst;
                uint32_t       ph_len;
                uint8_t        ph_zero[3];
                uint8_t        ph_nxt;
        } ph;
        struct cksum_vec vec[2];

/* pseudo-header */
        memset(&ph, 0, sizeof(ph));
        UNALIGNED_MEMCPY(&ph.ph_src, &ip6->ip6_src, sizeof (struct in6_addr));
        switch (ip6->ip6_nxt) {

case IPPROTO_HOPOPTS:
        case IPPROTO_DSTOPTS:
        case IPPROTO_MOBILITY_OLD:
        case IPPROTO_MOBILITY:
        case IPPROTO_FRAGMENT:
        case IPPROTO_ROUTING:
                /*
                 * The next header is either a routing header or a header
                 * after which there might be a routing header, so scan
                 * for a routing header.
                 */
                ip6_finddst(ndo, &ph.ph_dst, ip6);
                break;

default:
                UNALIGNED_MEMCPY(&ph.ph_dst, &ip6->ip6_dst, sizeof (struct in6_addr));
                break;
        }
        ph.ph_len = htonl(len);
        ph.ph_nxt = next_proto;

vec[0].ptr = (const uint8_t *)(void *)&ph;
        vec[0].len = sizeof(ph);
        vec[1].ptr = data;
        vec[1].len = covlen;

return in_cksum(vec, 2);
}

/*
 * print an IP6 datagram.
 */
void
ip6_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
	register const struct ip6_hdr *ip6;
	register int advance;
	u_int len;
	const u_char *ipend;
	register const u_char *cp;
	register u_int payload_len;
	int nh;
	int fragmented = 0;
	u_int flow;

ip6 = (const struct ip6_hdr *)bp;

ND_TCHECK(*ip6);
	if (length < sizeof (struct ip6_hdr)) {
		ND_PRINT((ndo, "truncated-ip6 %u", length));
		return;
	}

if (!ndo->ndo_eflag)
            ND_PRINT((ndo, "IP6 "));

if (IP6_VERSION(ip6) != 6) {
          ND_PRINT((ndo,"version error: %u != 6", IP6_VERSION(ip6)));
          return;
	}

payload_len = EXTRACT_16BITS(&ip6->ip6_plen);
	len = payload_len + sizeof(struct ip6_hdr);
	if (length < len)
		ND_PRINT((ndo, "truncated-ip6 - %u bytes missing!",
			len - length));

if (ndo->ndo_vflag) {
            flow = EXTRACT_32BITS(&ip6->ip6_flow);
            ND_PRINT((ndo, "("));
#if 0
            /* rfc1883 */
            if (flow & 0x0f000000)
		ND_PRINT((ndo, "pri 0x%02x, ", (flow & 0x0f000000) >> 24));
            if (flow & 0x00ffffff)
		ND_PRINT((ndo, "flowlabel 0x%06x, ", flow & 0x00ffffff));
#else
            /* RFC 2460 */
            if (flow & 0x0ff00000)
		ND_PRINT((ndo, "class 0x%02x, ", (flow & 0x0ff00000) >> 20));
            if (flow & 0x000fffff)
		ND_PRINT((ndo, "flowlabel 0x%05x, ", flow & 0x000fffff));
#endif

ND_PRINT((ndo, "hlim %u, next-header %s (%u) payload length: %u) ",
                         ip6->ip6_hlim,
                         tok2str(ipproto_values,"unknown",ip6->ip6_nxt),
                         ip6->ip6_nxt,
                         payload_len));
        }

/*
	 * Cut off the snapshot length to the end of the IP payload.
	 */
	ipend = bp + len;
	if (ipend < ndo->ndo_snapend)
		ndo->ndo_snapend = ipend;

cp = (const u_char *)ip6;
	advance = sizeof(struct ip6_hdr);
	nh = ip6->ip6_nxt;
	while (cp < ndo->ndo_snapend && advance > 0) {
		if (len < (u_int)advance)
			goto trunc;
		cp += advance;
		len -= advance;

if (cp == (const u_char *)(ip6 + 1) &&
		    nh != IPPROTO_TCP && nh != IPPROTO_UDP &&
		    nh != IPPROTO_DCCP && nh != IPPROTO_SCTP) {
			ND_PRINT((ndo, "%s > %s: ", ip6addr_string(ndo, &ip6->ip6_src),
				     ip6addr_string(ndo, &ip6->ip6_dst)));
		}

switch (nh) {
		case IPPROTO_HOPOPTS:
			advance = hbhopt_print(ndo, cp);
			if (advance < 0)
				return;
			nh = *cp;
			break;
		case IPPROTO_DSTOPTS:
			advance = dstopt_print(ndo, cp);
			if (advance < 0)
				return;
			nh = *cp;
			break;
		case IPPROTO_FRAGMENT:
			advance = frag6_print(ndo, cp, (const u_char *)ip6);
			if (advance < 0 || ndo->ndo_snapend <= cp + advance)
				return;
			nh = *cp;
			fragmented = 1;
			break;

case IPPROTO_MOBILITY_OLD:
		case IPPROTO_MOBILITY:
			/*
			 * XXX - we don't use "advance"; RFC 3775 says that
			 * the next header field in a mobility header
			 * should be IPPROTO_NONE, but speaks of
			 * the possiblity of a future extension in
			 * which payload can be piggybacked atop a
			 * mobility header.
			 */
			advance = mobility_print(ndo, cp, (const u_char *)ip6);
			if (advance < 0)
				return;
			nh = *cp;
			return;
		case IPPROTO_ROUTING:
			ND_TCHECK(*cp);
			advance = rt6_print(ndo, cp, (const u_char *)ip6);
			if (advance < 0)
				return;
			nh = *cp;
			break;
		case IPPROTO_SCTP:
			sctp_print(ndo, cp, (const u_char *)ip6, len);
			return;
		case IPPROTO_DCCP:
			dccp_print(ndo, cp, (const u_char *)ip6, len);
			return;
		case IPPROTO_TCP:
			tcp_print(ndo, cp, len, (const u_char *)ip6, fragmented);
			return;
		case IPPROTO_UDP:
			udp_print(ndo, cp, len, (const u_char *)ip6, fragmented);
			return;
		case IPPROTO_ICMPV6:
			icmp6_print(ndo, cp, len, (const u_char *)ip6, fragmented);
			return;
		case IPPROTO_AH:
			advance = ah_print(ndo, cp);
			if (advance < 0)
				return;
			nh = *cp;
			break;
		case IPPROTO_ESP:
		    {
			int enh, padlen;
			advance = esp_print(ndo, cp, len, (const u_char *)ip6, &enh, &padlen);
			if (advance < 0)
				return;
			nh = enh & 0xff;
			len -= padlen;
			break;
		    }
		case IPPROTO_IPCOMP:
		    {
			ipcomp_print(ndo, cp);
			/*
			 * Either this has decompressed the payload and
			 * printed it, in which case there's nothing more
			 * to do, or it hasn't, in which case there's
			 * nothing more to do.
			 */
			advance = -1;
			break;
		    }

case IPPROTO_PIM:
			pim_print(ndo, cp, len, (const u_char *)ip6);
			return;

case IPPROTO_OSPF:
			ospf6_print(ndo, cp, len);
			return;

case IPPROTO_IPV6:
			ip6_print(ndo, cp, len);
			return;

case IPPROTO_IPV4:
		        ip_print(ndo, cp, len);
			return;

case IPPROTO_PGM:
                        pgm_print(ndo, cp, len, (const u_char *)ip6);
                        return;

case IPPROTO_GRE:
			gre_print(ndo, cp, len);
			return;

case IPPROTO_RSVP:
			rsvp_print(ndo, cp, len);
			return;

case IPPROTO_NONE:
			ND_PRINT((ndo, "no next header"));
			return;

default:
			ND_PRINT((ndo, "ip-proto-%d %d", nh, len));
			return;
		}
	}

return;
trunc:
	ND_PRINT((ndo, "[|ip6]"));
}

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