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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-slow.c

/*
 * Copyright (c) 1998-2006 The TCPDUMP project
 *
 * 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, and (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.
 * 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.
 *
 * support for the IEEE "slow protocols" LACP, MARKER as per 802.3ad
 *                                       OAM as per 802.3ah
 *
 * Original code by Hannes Gredler (hannes@gredler.at)
 */

/* \summary: IEEE "slow protocols" (802.3ad/802.3ah) printer */

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

#include <netdissect-stdinc.h>

#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
#include "ether.h"
#include "oui.h"

#define	SLOW_PROTO_LACP                     1
#define	SLOW_PROTO_MARKER                   2
#define SLOW_PROTO_OAM                      3

#define	LACP_VERSION                        1
#define	MARKER_VERSION                      1

static const struct tok slow_proto_values[] = {
    { SLOW_PROTO_LACP, "LACP" },
    { SLOW_PROTO_MARKER, "MARKER" },
    { SLOW_PROTO_OAM, "OAM" },
    { 0, NULL}
};

static const struct tok slow_oam_flag_values[] = {
    { 0x0001, "Link Fault" },
    { 0x0002, "Dying Gasp" },
    { 0x0004, "Critical Event" },
    { 0x0008, "Local Evaluating" },
    { 0x0010, "Local Stable" },
    { 0x0020, "Remote Evaluating" },
    { 0x0040, "Remote Stable" },
    { 0, NULL}
};

#define SLOW_OAM_CODE_INFO          0x00
#define SLOW_OAM_CODE_EVENT_NOTIF   0x01
#define SLOW_OAM_CODE_VAR_REQUEST   0x02
#define SLOW_OAM_CODE_VAR_RESPONSE  0x03
#define SLOW_OAM_CODE_LOOPBACK_CTRL 0x04
#define SLOW_OAM_CODE_PRIVATE       0xfe

static const struct tok slow_oam_code_values[] = {
    { SLOW_OAM_CODE_INFO, "Information" },
    { SLOW_OAM_CODE_EVENT_NOTIF, "Event Notification" },
    { SLOW_OAM_CODE_VAR_REQUEST, "Variable Request" },
    { SLOW_OAM_CODE_VAR_RESPONSE, "Variable Response" },
    { SLOW_OAM_CODE_LOOPBACK_CTRL, "Loopback Control" },
    { SLOW_OAM_CODE_PRIVATE, "Vendor Private" },
    { 0, NULL}
};

struct slow_oam_info_t {
    uint8_t info_type;
    uint8_t info_length;
    uint8_t oam_version;
    uint8_t revision[2];
    uint8_t state;
    uint8_t oam_config;
    uint8_t oam_pdu_config[2];
    uint8_t oui[3];
    uint8_t vendor_private[4];
};

#define SLOW_OAM_INFO_TYPE_END_OF_TLV 0x00
#define SLOW_OAM_INFO_TYPE_LOCAL 0x01
#define SLOW_OAM_INFO_TYPE_REMOTE 0x02
#define SLOW_OAM_INFO_TYPE_ORG_SPECIFIC 0xfe

static const struct tok slow_oam_info_type_values[] = {
    { SLOW_OAM_INFO_TYPE_END_OF_TLV, "End of TLV marker" },
    { SLOW_OAM_INFO_TYPE_LOCAL, "Local" },
    { SLOW_OAM_INFO_TYPE_REMOTE, "Remote" },
    { SLOW_OAM_INFO_TYPE_ORG_SPECIFIC, "Organization specific" },
    { 0, NULL}
};

#define OAM_INFO_TYPE_PARSER_MASK 0x3
static const struct tok slow_oam_info_type_state_parser_values[] = {
    { 0x00, "forwarding" },
    { 0x01, "looping back" },
    { 0x02, "discarding" },
    { 0x03, "reserved" },
    { 0, NULL}
};

#define OAM_INFO_TYPE_MUX_MASK 0x4
static const struct tok slow_oam_info_type_state_mux_values[] = {
    { 0x00, "forwarding" },
    { 0x04, "discarding" },
    { 0, NULL}
};

static const struct tok slow_oam_info_type_oam_config_values[] = {
    { 0x01, "Active" },
    { 0x02, "Unidirectional" },
    { 0x04, "Remote-Loopback" },
    { 0x08, "Link-Events" },
    { 0x10, "Variable-Retrieval" },
    { 0, NULL}
};

/* 11 Bits */
#define OAM_INFO_TYPE_PDU_SIZE_MASK 0x7ff

#define SLOW_OAM_LINK_EVENT_END_OF_TLV 0x00
#define SLOW_OAM_LINK_EVENT_ERR_SYM_PER 0x01
#define SLOW_OAM_LINK_EVENT_ERR_FRM 0x02
#define SLOW_OAM_LINK_EVENT_ERR_FRM_PER 0x03
#define SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM 0x04
#define SLOW_OAM_LINK_EVENT_ORG_SPECIFIC 0xfe

static const struct tok slow_oam_link_event_values[] = {
    { SLOW_OAM_LINK_EVENT_END_OF_TLV, "End of TLV marker" },
    { SLOW_OAM_LINK_EVENT_ERR_SYM_PER, "Errored Symbol Period Event" },
    { SLOW_OAM_LINK_EVENT_ERR_FRM, "Errored Frame Event" },
    { SLOW_OAM_LINK_EVENT_ERR_FRM_PER, "Errored Frame Period Event" },
    { SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM, "Errored Frame Seconds Summary Event" },
    { SLOW_OAM_LINK_EVENT_ORG_SPECIFIC, "Organization specific" },
    { 0, NULL}
};

struct slow_oam_link_event_t {
    uint8_t event_type;
    uint8_t event_length;
    uint8_t time_stamp[2];
    uint8_t window[8];
    uint8_t threshold[8];
    uint8_t errors[8];
    uint8_t errors_running_total[8];
    uint8_t event_running_total[4];
};

struct slow_oam_variablerequest_t {
    uint8_t branch;
    uint8_t leaf[2];
};

struct slow_oam_variableresponse_t {
    uint8_t branch;
    uint8_t leaf[2];
    uint8_t length;
};

struct slow_oam_loopbackctrl_t {
    uint8_t command;
};

static const struct tok slow_oam_loopbackctrl_cmd_values[] = {
    { 0x01, "Enable OAM Remote Loopback" },
    { 0x02, "Disable OAM Remote Loopback" },
    { 0, NULL}
};

struct tlv_header_t {
    uint8_t type;
    uint8_t length;
};

#define LACP_MARKER_TLV_TERMINATOR     0x00  /* same code for LACP and Marker */

#define LACP_TLV_ACTOR_INFO            0x01
#define LACP_TLV_PARTNER_INFO          0x02
#define LACP_TLV_COLLECTOR_INFO        0x03

#define MARKER_TLV_MARKER_INFO         0x01

static const struct tok slow_tlv_values[] = {
    { (SLOW_PROTO_LACP << 8) + LACP_MARKER_TLV_TERMINATOR, "Terminator"},
    { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
    { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
    { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},

{ (SLOW_PROTO_MARKER << 8) + LACP_MARKER_TLV_TERMINATOR, "Terminator"},
    { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
    { 0, NULL}
};

struct lacp_tlv_actor_partner_info_t {
    uint8_t sys_pri[2];
    uint8_t sys[ETHER_ADDR_LEN];
    uint8_t key[2];
    uint8_t port_pri[2];
    uint8_t port[2];
    uint8_t state;
    uint8_t pad[3];
};

static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
    { 0x01, "Activity"},
    { 0x02, "Timeout"},
    { 0x04, "Aggregation"},
    { 0x08, "Synchronization"},
    { 0x10, "Collecting"},
    { 0x20, "Distributing"},
    { 0x40, "Default"},
    { 0x80, "Expired"},
    { 0, NULL}
};

struct lacp_tlv_collector_info_t {
    uint8_t max_delay[2];
    uint8_t pad[12];
};

struct marker_tlv_marker_info_t {
    uint8_t req_port[2];
    uint8_t req_sys[ETHER_ADDR_LEN];
    uint8_t req_trans_id[4];
    uint8_t pad[2];
};

struct lacp_marker_tlv_terminator_t {
    uint8_t pad[50];
};

static void slow_marker_lacp_print(netdissect_options *, register const u_char *, register u_int, u_int);
static void slow_oam_print(netdissect_options *, register const u_char *, register u_int);

void
slow_print(netdissect_options *ndo,
           register const u_char *pptr, register u_int len)
{
    int print_version;
    u_int subtype;

if (len < 1)
        goto tooshort;
    ND_TCHECK(*pptr);
    subtype = *pptr;

/*
     * Sanity checking of the header.
     */
    switch (subtype) {
    case SLOW_PROTO_LACP:
        if (len < 2)
            goto tooshort;
        ND_TCHECK(*(pptr+1));
        if (*(pptr+1) != LACP_VERSION) {
            ND_PRINT((ndo, "LACP version %u packet not supported", *(pptr+1)));
            return;
        }
        print_version = 1;
        break;

case SLOW_PROTO_MARKER:
        if (len < 2)
            goto tooshort;
        ND_TCHECK(*(pptr+1));
        if (*(pptr+1) != MARKER_VERSION) {
            ND_PRINT((ndo, "MARKER version %u packet not supported", *(pptr+1)));
            return;
        }
        print_version = 1;
        break;

case SLOW_PROTO_OAM: /* fall through */
        print_version = 0;
        break;

default:
        /* print basic information and exit */
        print_version = -1;
        break;
    }

if (print_version == 1) {
        ND_PRINT((ndo, "%sv%u, length %u",
               tok2str(slow_proto_values, "unknown (%u)", subtype),
               *(pptr+1),
               len));
    } else {
        /* some slow protos don't have a version number in the header */
        ND_PRINT((ndo, "%s, length %u",
               tok2str(slow_proto_values, "unknown (%u)", subtype),
               len));
    }

/* unrecognized subtype */
    if (print_version == -1) {
        print_unknown_data(ndo, pptr, "\n\t", len);
        return;
    }

if (!ndo->ndo_vflag)
        return;

switch (subtype) {
    default: /* should not happen */
        break;

case SLOW_PROTO_OAM:
        /* skip subtype */
        len -= 1;
        pptr += 1;
        slow_oam_print(ndo, pptr, len);
        break;

case SLOW_PROTO_LACP:   /* LACP and MARKER share the same semantics */
    case SLOW_PROTO_MARKER:
        /* skip subtype and version */
        len -= 2;
        pptr += 2;
        slow_marker_lacp_print(ndo, pptr, len, subtype);
        break;
    }
    return;

tooshort:
    if (!ndo->ndo_vflag)
        ND_PRINT((ndo, " (packet is too short)"));
    else
        ND_PRINT((ndo, "\n\t\t packet is too short"));
    return;

trunc:
    if (!ndo->ndo_vflag)
        ND_PRINT((ndo, " (packet exceeded snapshot)"));
    else
        ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}

static void
slow_marker_lacp_print(netdissect_options *ndo,
                       register const u_char *tptr, register u_int tlen,
                       u_int proto_subtype)
{
    const struct tlv_header_t *tlv_header;
    const u_char *tlv_tptr;
    u_int tlv_len, tlv_tlen;

union {
        const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
        const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
        const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
        const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
    } tlv_ptr;

while(tlen>0) {
        /* is the packet big enough to include the tlv header ? */
        if (tlen < sizeof(struct tlv_header_t))
            goto tooshort;
        /* did we capture enough for fully decoding the tlv header ? */
        ND_TCHECK2(*tptr, sizeof(struct tlv_header_t));
        tlv_header = (const struct tlv_header_t *)tptr;
        tlv_len = tlv_header->length;

ND_PRINT((ndo, "\n\t%s TLV (0x%02x), length %u",
               tok2str(slow_tlv_values,
                       "Unknown",
                       (proto_subtype << 8) + tlv_header->type),
               tlv_header->type,
               tlv_len));

if (tlv_header->type == LACP_MARKER_TLV_TERMINATOR) {
            /*
             * This TLV has a length of zero, and means there are no
             * more TLVs to process.
             */
            return;
        }

/* length includes the type and length fields */
        if (tlv_len < sizeof(struct tlv_header_t)) {
            ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be >= %lu",
                   (unsigned long) sizeof(struct tlv_header_t)));
            return;
        }

/* is the packet big enough to include the tlv ? */
        if (tlen < tlv_len)
            goto tooshort;
        /* did we capture enough for fully decoding the tlv ? */
        ND_TCHECK2(*tptr, tlv_len);

tlv_tptr=tptr+sizeof(struct tlv_header_t);
        tlv_tlen=tlv_len-sizeof(struct tlv_header_t);

switch((proto_subtype << 8) + tlv_header->type) {

/* those two TLVs have the same structure -> fall through */
        case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
        case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
            if (tlv_tlen !=
                sizeof(struct lacp_tlv_actor_partner_info_t)) {
                ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
                       (unsigned long) (sizeof(struct tlv_header_t) + sizeof(struct lacp_tlv_actor_partner_info_t))));
                goto badlength;
            }

tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;

ND_PRINT((ndo, "\n\t  System %s, System Priority %u, Key %u" \
                   ", Port %u, Port Priority %u\n\t  State Flags [%s]",
                   etheraddr_string(ndo, tlv_ptr.lacp_tlv_actor_partner_info->sys),
                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
                   bittok2str(lacp_tlv_actor_partner_info_state_values,
                              "none",
                              tlv_ptr.lacp_tlv_actor_partner_info->state)));

break;

case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
            if (tlv_tlen !=
                sizeof(struct lacp_tlv_collector_info_t)) {
                ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
                       (unsigned long) (sizeof(struct tlv_header_t) + sizeof(struct lacp_tlv_collector_info_t))));
                goto badlength;
            }

tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;

ND_PRINT((ndo, "\n\t  Max Delay %u",
                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay)));

break;

case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
            if (tlv_tlen !=
                sizeof(struct marker_tlv_marker_info_t)) {
                ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
                       (unsigned long) (sizeof(struct tlv_header_t) + sizeof(struct marker_tlv_marker_info_t))));
                goto badlength;
            }

tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;

ND_PRINT((ndo, "\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
                   etheraddr_string(ndo, tlv_ptr.marker_tlv_marker_info->req_sys),
                   EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
                   EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id)));

break;

default:
            if (ndo->ndo_vflag <= 1)
                print_unknown_data(ndo, tlv_tptr, "\n\t  ", tlv_tlen);
            break;
        }

badlength:
        /* do we want to see an additional hexdump ? */
        if (ndo->ndo_vflag > 1) {
            print_unknown_data(ndo, tptr+sizeof(struct tlv_header_t), "\n\t  ",
                               tlv_len-sizeof(struct tlv_header_t));
        }

tptr+=tlv_len;
        tlen-=tlv_len;
    }
    return;

tooshort:
    ND_PRINT((ndo, "\n\t\t packet is too short"));
    return;

trunc:
    ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}

static void
slow_oam_print(netdissect_options *ndo,
               register const u_char *tptr, register u_int tlen)
{
    u_int hexdump;

struct slow_oam_common_header_t {
        uint8_t flags[2];
        uint8_t code;
    };

struct slow_oam_tlv_header_t {
        uint8_t type;
        uint8_t length;
    };

union {
        const struct slow_oam_common_header_t *slow_oam_common_header;
        const struct slow_oam_tlv_header_t *slow_oam_tlv_header;
    } ptr;

union {
	const struct slow_oam_info_t *slow_oam_info;
        const struct slow_oam_link_event_t *slow_oam_link_event;
        const struct slow_oam_variablerequest_t *slow_oam_variablerequest;
        const struct slow_oam_variableresponse_t *slow_oam_variableresponse;
        const struct slow_oam_loopbackctrl_t *slow_oam_loopbackctrl;
    } tlv;

ptr.slow_oam_common_header = (const struct slow_oam_common_header_t *)tptr;
    if (tlen < sizeof(*ptr.slow_oam_common_header))
        goto tooshort;
    ND_TCHECK(*ptr.slow_oam_common_header);
    tptr += sizeof(struct slow_oam_common_header_t);
    tlen -= sizeof(struct slow_oam_common_header_t);

ND_PRINT((ndo, "\n\tCode %s OAM PDU, Flags [%s]",
           tok2str(slow_oam_code_values, "Unknown (%u)", ptr.slow_oam_common_header->code),
           bittok2str(slow_oam_flag_values,
                      "none",
                      EXTRACT_16BITS(&ptr.slow_oam_common_header->flags))));

switch (ptr.slow_oam_common_header->code) {
    case SLOW_OAM_CODE_INFO:
        while (tlen > 0) {
            ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
            if (tlen < sizeof(*ptr.slow_oam_tlv_header))
                goto tooshort;
            ND_TCHECK(*ptr.slow_oam_tlv_header);
            ND_PRINT((ndo, "\n\t  %s Information Type (%u), length %u",
                   tok2str(slow_oam_info_type_values, "Reserved",
                           ptr.slow_oam_tlv_header->type),
                   ptr.slow_oam_tlv_header->type,
                   ptr.slow_oam_tlv_header->length));

if (ptr.slow_oam_tlv_header->type == SLOW_OAM_INFO_TYPE_END_OF_TLV) {
                /*
                 * As IEEE Std 802.3-2015 says for the End of TLV Marker,
                 * "(the length and value of the Type 0x00 TLV can be ignored)".
                 */
                return;
            }

/* length includes the type and length fields */
            if (ptr.slow_oam_tlv_header->length < sizeof(struct slow_oam_tlv_header_t)) {
                ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be >= %u",
                       (u_int)sizeof(struct slow_oam_tlv_header_t)));
                return;
            }

if (tlen < ptr.slow_oam_tlv_header->length)
                goto tooshort;
            ND_TCHECK2(*tptr, ptr.slow_oam_tlv_header->length);

hexdump = FALSE;
            switch (ptr.slow_oam_tlv_header->type) {
            case SLOW_OAM_INFO_TYPE_LOCAL: /* identical format - fall through */
            case SLOW_OAM_INFO_TYPE_REMOTE:
                tlv.slow_oam_info = (const struct slow_oam_info_t *)tptr;

if (tlv.slow_oam_info->info_length !=
                    sizeof(struct slow_oam_info_t)) {
                    ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
                           (unsigned long) sizeof(struct slow_oam_info_t)));
                    hexdump = TRUE;
                    goto badlength_code_info;
                }

ND_PRINT((ndo, "\n\t    OAM-Version %u, Revision %u",
                       tlv.slow_oam_info->oam_version,
                       EXTRACT_16BITS(&tlv.slow_oam_info->revision)));

ND_PRINT((ndo, "\n\t    State-Parser-Action %s, State-MUX-Action %s",
                       tok2str(slow_oam_info_type_state_parser_values, "Reserved",
                               tlv.slow_oam_info->state & OAM_INFO_TYPE_PARSER_MASK),
                       tok2str(slow_oam_info_type_state_mux_values, "Reserved",
                               tlv.slow_oam_info->state & OAM_INFO_TYPE_MUX_MASK)));
                ND_PRINT((ndo, "\n\t    OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
                       bittok2str(slow_oam_info_type_oam_config_values, "none",
                                  tlv.slow_oam_info->oam_config),
                       EXTRACT_16BITS(&tlv.slow_oam_info->oam_pdu_config) &
                       OAM_INFO_TYPE_PDU_SIZE_MASK));
                ND_PRINT((ndo, "\n\t    OUI %s (0x%06x), Vendor-Private 0x%08x",
                       tok2str(oui_values, "Unknown",
                               EXTRACT_24BITS(&tlv.slow_oam_info->oui)),
                       EXTRACT_24BITS(&tlv.slow_oam_info->oui),
                       EXTRACT_32BITS(&tlv.slow_oam_info->vendor_private)));
                break;

case SLOW_OAM_INFO_TYPE_ORG_SPECIFIC:
                hexdump = TRUE;
                break;

default:
                hexdump = TRUE;
                break;
            }

badlength_code_info:
            /* do we also want to see a hex dump ? */
            if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
                print_unknown_data(ndo, tptr, "\n\t  ",
                                   ptr.slow_oam_tlv_header->length);
            }

tlen -= ptr.slow_oam_tlv_header->length;
            tptr += ptr.slow_oam_tlv_header->length;
        }
        break;

case SLOW_OAM_CODE_EVENT_NOTIF:
        /* Sequence number */
        if (tlen < 2)
            goto tooshort;
        ND_TCHECK2(*tptr, 2);
        ND_PRINT((ndo, "\n\t  Sequence Number %u", EXTRACT_16BITS(tptr)));
        tlen -= 2;
        tptr += 2;

/* TLVs */
        while (tlen > 0) {
            ptr.slow_oam_tlv_header = (const struct slow_oam_tlv_header_t *)tptr;
            if (tlen < sizeof(*ptr.slow_oam_tlv_header))
                goto tooshort;
            ND_TCHECK(*ptr.slow_oam_tlv_header);
            ND_PRINT((ndo, "\n\t  %s Link Event Type (%u), length %u",
                   tok2str(slow_oam_link_event_values, "Reserved",
                           ptr.slow_oam_tlv_header->type),
                   ptr.slow_oam_tlv_header->type,
                   ptr.slow_oam_tlv_header->length));

if (tlen < ptr.slow_oam_tlv_header->length)
                goto tooshort;
            ND_TCHECK2(*tptr, ptr.slow_oam_tlv_header->length);

hexdump = FALSE;
            switch (ptr.slow_oam_tlv_header->type) {
            case SLOW_OAM_LINK_EVENT_ERR_SYM_PER: /* identical format - fall through */
            case SLOW_OAM_LINK_EVENT_ERR_FRM:
            case SLOW_OAM_LINK_EVENT_ERR_FRM_PER:
            case SLOW_OAM_LINK_EVENT_ERR_FRM_SUMM:
                tlv.slow_oam_link_event = (const struct slow_oam_link_event_t *)tptr;

if (tlv.slow_oam_link_event->event_length !=
                    sizeof(struct slow_oam_link_event_t)) {
                    ND_PRINT((ndo, "\n\t    ERROR: illegal length - should be %lu",
                           (unsigned long) sizeof(struct slow_oam_link_event_t)));
                    hexdump = TRUE;
                    goto badlength_event_notif;
                }

ND_PRINT((ndo, "\n\t    Timestamp %u ms, Errored Window %" PRIu64
                       "\n\t    Errored Threshold %" PRIu64
                       "\n\t    Errors %" PRIu64
                       "\n\t    Error Running Total %" PRIu64
                       "\n\t    Event Running Total %u",
                       EXTRACT_16BITS(&tlv.slow_oam_link_event->time_stamp)*100,
                       EXTRACT_64BITS(&tlv.slow_oam_link_event->window),
                       EXTRACT_64BITS(&tlv.slow_oam_link_event->threshold),
                       EXTRACT_64BITS(&tlv.slow_oam_link_event->errors),
                       EXTRACT_64BITS(&tlv.slow_oam_link_event->errors_running_total),
                       EXTRACT_32BITS(&tlv.slow_oam_link_event->event_running_total)));
                break;

case SLOW_OAM_LINK_EVENT_ORG_SPECIFIC:
                hexdump = TRUE;
                break;

default:
                hexdump = TRUE;
                break;
            }

badlength_event_notif:
            /* do we also want to see a hex dump ? */
            if (ndo->ndo_vflag > 1 || hexdump==TRUE) {
                print_unknown_data(ndo, tptr, "\n\t  ",
                                   ptr.slow_oam_tlv_header->length);
            }

tlen -= ptr.slow_oam_tlv_header->length;
            tptr += ptr.slow_oam_tlv_header->length;
        }
        break;

case SLOW_OAM_CODE_LOOPBACK_CTRL:
        tlv.slow_oam_loopbackctrl = (const struct slow_oam_loopbackctrl_t *)tptr;
        if (tlen < sizeof(*tlv.slow_oam_loopbackctrl))
            goto tooshort;
        ND_TCHECK(*tlv.slow_oam_loopbackctrl);
        ND_PRINT((ndo, "\n\t  Command %s (%u)",
               tok2str(slow_oam_loopbackctrl_cmd_values,
                       "Unknown",
                       tlv.slow_oam_loopbackctrl->command),
               tlv.slow_oam_loopbackctrl->command));
        tptr ++;
        tlen --;
        break;

/*
         * FIXME those are the defined codes that lack a decoder
         * you are welcome to contribute code ;-)
         */
    case SLOW_OAM_CODE_VAR_REQUEST:
    case SLOW_OAM_CODE_VAR_RESPONSE:
    case SLOW_OAM_CODE_PRIVATE:
    default:
        if (ndo->ndo_vflag <= 1) {
            print_unknown_data(ndo, tptr, "\n\t  ", tlen);
        }
        break;
    }
    return;

tooshort:
    ND_PRINT((ndo, "\n\t\t packet is too short"));
    return;

trunc:
    ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}

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