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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-sll.c

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

/* \summary: Linux cooked sockets capture printer */

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

#include <netdissect-stdinc.h>

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

#include "ether.h"

/*
 * For captures on Linux cooked sockets, we construct a fake header
 * that includes:
 *
 *	a 2-byte "packet type" which is one of:
 *
 *		LINUX_SLL_HOST		packet was sent to us
 *		LINUX_SLL_BROADCAST	packet was broadcast
 *		LINUX_SLL_MULTICAST	packet was multicast
 *		LINUX_SLL_OTHERHOST	packet was sent to somebody else
 *		LINUX_SLL_OUTGOING	packet was sent *by* us;
 *
 *	a 2-byte Ethernet protocol field;
 *
 *	a 2-byte link-layer type;
 *
 *	a 2-byte link-layer address length;
 *
 *	an 8-byte source link-layer address, whose actual length is
 *	specified by the previous value.
 *
 * All fields except for the link-layer address are in network byte order.
 *
 * DO NOT change the layout of this structure, or change any of the
 * LINUX_SLL_ values below.  If you must change the link-layer header
 * for a "cooked" Linux capture, introduce a new DLT_ type (ask
 * "tcpdump-workers@lists.tcpdump.org" for one, so that you don't give it
 * a value that collides with a value already being used), and use the
 * new header in captures of that type, so that programs that can
 * handle DLT_LINUX_SLL captures will continue to handle them correctly
 * without any change, and so that capture files with different headers
 * can be told apart and programs that read them can dissect the
 * packets in them.
 *
 * This structure, and the #defines below, must be the same in the
 * libpcap and tcpdump versions of "sll.h".
 */

/*
 * A DLT_LINUX_SLL fake link-layer header.
 */
#define SLL_HDR_LEN	16		/* total header length */
#define SLL_ADDRLEN	8		/* length of address field */

struct sll_header {
	uint16_t	sll_pkttype;	/* packet type */
	uint16_t	sll_hatype;	/* link-layer address type */
	uint16_t	sll_halen;	/* link-layer address length */
	uint8_t		sll_addr[SLL_ADDRLEN];	/* link-layer address */
	uint16_t	sll_protocol;	/* protocol */
};

/*
 * The LINUX_SLL_ values for "sll_pkttype"; these correspond to the
 * PACKET_ values on Linux, but are defined here so that they're
 * available even on systems other than Linux, and so that they
 * don't change even if the PACKET_ values change.
 */
#define LINUX_SLL_HOST		0
#define LINUX_SLL_BROADCAST	1
#define LINUX_SLL_MULTICAST	2
#define LINUX_SLL_OTHERHOST	3
#define LINUX_SLL_OUTGOING	4

/*
 * The LINUX_SLL_ values for "sll_protocol"; these correspond to the
 * ETH_P_ values on Linux, but are defined here so that they're
 * available even on systems other than Linux.  We assume, for now,
 * that the ETH_P_ values won't change in Linux; if they do, then:
 *
 *	if we don't translate them in "pcap-linux.c", capture files
 *	won't necessarily be readable if captured on a system that
 *	defines ETH_P_ values that don't match these values;
 *
 *	if we do translate them in "pcap-linux.c", that makes life
 *	unpleasant for the BPF code generator, as the values you test
 *	for in the kernel aren't the values that you test for when
 *	reading a capture file, so the fixup code run on BPF programs
 *	handed to the kernel ends up having to do more work.
 *
 * Add other values here as necessary, for handling packet types that
 * might show up on non-Ethernet, non-802.x networks.  (Not all the ones
 * in the Linux "if_ether.h" will, I suspect, actually show up in
 * captures.)
 */
#define LINUX_SLL_P_802_3	0x0001	/* Novell 802.3 frames without 802.2 LLC header */
#define LINUX_SLL_P_802_2	0x0004	/* 802.2 frames (not D/I/X Ethernet) */

static const struct tok sll_pkttype_values[] = {
    { LINUX_SLL_HOST, "In" },
    { LINUX_SLL_BROADCAST, "B" },
    { LINUX_SLL_MULTICAST, "M" },
    { LINUX_SLL_OTHERHOST, "P" },
    { LINUX_SLL_OUTGOING, "Out" },
    { 0, NULL}
};

static inline void
sll_print(netdissect_options *ndo, register const struct sll_header *sllp, u_int length)
{
	u_short ether_type;

ND_PRINT((ndo, "%3s ",tok2str(sll_pkttype_values,"?",EXTRACT_16BITS(&sllp->sll_pkttype))));

/*
	 * XXX - check the link-layer address type value?
	 * For now, we just assume 6 means Ethernet.
	 * XXX - print others as strings of hex?
	 */
	if (EXTRACT_16BITS(&sllp->sll_halen) == 6)
		ND_PRINT((ndo, "%s ", etheraddr_string(ndo, sllp->sll_addr)));

if (!ndo->ndo_qflag) {
		ether_type = EXTRACT_16BITS(&sllp->sll_protocol);

if (ether_type <= ETHERMTU) {
			/*
			 * Not an Ethernet type; what type is it?
			 */
			switch (ether_type) {

case LINUX_SLL_P_802_3:
				/*
				 * Ethernet_802.3 IPX frame.
				 */
				ND_PRINT((ndo, "802.3"));
				break;

case LINUX_SLL_P_802_2:
				/*
				 * 802.2.
				 */
				ND_PRINT((ndo, "802.2"));
				break;

default:
				/*
				 * What is it?
				 */
				ND_PRINT((ndo, "ethertype Unknown (0x%04x)",
				    ether_type));
				break;
			}
		} else {
			ND_PRINT((ndo, "ethertype %s (0x%04x)",
			    tok2str(ethertype_values, "Unknown", ether_type),
			    ether_type));
		}
		ND_PRINT((ndo, ", length %u: ", length));
	}
}

/*
 * This is the top level routine of the printer.  'p' points to the
 * Linux "cooked capture" header of the packet, 'h->ts' is the timestamp,
 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 * is the number of bytes actually captured.
 */
u_int
sll_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
{
	u_int caplen = h->caplen;
	u_int length = h->len;
	register const struct sll_header *sllp;
	u_short hatype;
	u_short ether_type;
	int llc_hdrlen;
	u_int hdrlen;

if (caplen < SLL_HDR_LEN) {
		/*
		 * XXX - this "can't happen" because "pcap-linux.c" always
		 * adds this many bytes of header to every packet in a
		 * cooked socket capture.
		 */
		ND_PRINT((ndo, "[|sll]"));
		return (caplen);
	}

sllp = (const struct sll_header *)p;

if (ndo->ndo_eflag)
		sll_print(ndo, sllp, length);

/*
	 * Go past the cooked-mode header.
	 */
	length -= SLL_HDR_LEN;
	caplen -= SLL_HDR_LEN;
	p += SLL_HDR_LEN;
	hdrlen = SLL_HDR_LEN;

hatype = EXTRACT_16BITS(&sllp->sll_hatype);
	switch (hatype) {

case 803:
		/*
		 * This is an packet with a radiotap header;
		 * just dissect the payload as such.
		 */
		return (SLL_HDR_LEN + ieee802_11_radio_print(ndo, p, length, caplen));
	}
	ether_type = EXTRACT_16BITS(&sllp->sll_protocol);

recurse:
	/*
	 * Is it (gag) an 802.3 encapsulation, or some non-Ethernet
	 * packet type?
	 */
	if (ether_type <= ETHERMTU) {
		/*
		 * Yes - what type is it?
		 */
		switch (ether_type) {

case LINUX_SLL_P_802_3:
			/*
			 * Ethernet_802.3 IPX frame.
			 */
			ipx_print(ndo, p, length);
			break;

case LINUX_SLL_P_802_2:
			/*
			 * 802.2.
			 * Try to print the LLC-layer header & higher layers.
			 */
			llc_hdrlen = llc_print(ndo, p, length, caplen, NULL, NULL);
			if (llc_hdrlen < 0)
				goto unknown;	/* unknown LLC type */
			hdrlen += llc_hdrlen;
			break;

default:
			/*FALLTHROUGH*/

unknown:
			/* packet type not known, print raw packet */
			if (!ndo->ndo_suppress_default_print)
				ND_DEFAULTPRINT(p, caplen);
			break;
		}
	} else if (ether_type == ETHERTYPE_8021Q) {
		/*
		 * Print VLAN information, and then go back and process
		 * the enclosed type field.
		 */
		if (caplen < 4) {
			ND_PRINT((ndo, "[|vlan]"));
			return (hdrlen + caplen);
		}
		if (length < 4) {
			ND_PRINT((ndo, "[|vlan]"));
			return (hdrlen + length);
		}
	        if (ndo->ndo_eflag) {
	        	uint16_t tag = EXTRACT_16BITS(p);

ND_PRINT((ndo, "%s, ", ieee8021q_tci_string(tag)));
		}

ether_type = EXTRACT_16BITS(p + 2);
		if (ether_type <= ETHERMTU)
			ether_type = LINUX_SLL_P_802_2;
		if (!ndo->ndo_qflag) {
			ND_PRINT((ndo, "ethertype %s, ",
			    tok2str(ethertype_values, "Unknown", ether_type)));
		}
		p += 4;
		length -= 4;
		caplen -= 4;
		hdrlen += 4;
		goto recurse;
	} else {
		if (ethertype_print(ndo, ether_type, p, length, caplen, NULL, NULL) == 0) {
			/* ether_type not known, print raw packet */
			if (!ndo->ndo_eflag)
				sll_print(ndo, sllp, length + SLL_HDR_LEN);
			if (!ndo->ndo_suppress_default_print)
				ND_DEFAULTPRINT(p, caplen);
		}
	}

return (hdrlen);
}

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Editing: print-sll.c

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