Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 737 insertions, 0 deletions

diff --git a/print-slow.c b/print-slow.c
new file mode 100644
index 0000000..1183818
--- /dev/null
+++ b/print-slow.c
@@ -0,0 +1,737 @@
+/*
+ * 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"
+
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "extract.h"
+#include "addrtoname.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 {
+    nd_uint8_t info_type;
+    nd_uint8_t info_length;
+    nd_uint8_t oam_version;
+    nd_uint16_t revision;
+    nd_uint8_t state;
+    nd_uint8_t oam_config;
+    nd_uint16_t oam_pdu_config;
+    nd_uint24_t oui;
+    nd_uint32_t vendor_private;
+};
+
+#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 {
+    nd_uint8_t event_type;
+    nd_uint8_t event_length;
+    nd_uint16_t time_stamp;
+    nd_uint64_t window;
+    nd_uint64_t threshold;
+    nd_uint64_t errors;
+    nd_uint64_t errors_running_total;
+    nd_uint32_t event_running_total;
+};
+
+struct slow_oam_variablerequest_t {
+    nd_uint8_t branch;
+    nd_uint16_t leaf;
+};
+
+struct slow_oam_variableresponse_t {
+    nd_uint8_t branch;
+    nd_uint16_t leaf;
+    nd_uint8_t length;
+};
+
+struct slow_oam_loopbackctrl_t {
+    nd_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 {
+    nd_uint8_t type;
+    nd_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 {
+    nd_uint16_t sys_pri;
+    nd_mac_addr sys;
+    nd_uint16_t key;
+    nd_uint16_t port_pri;
+    nd_uint16_t port;
+    nd_uint8_t state;
+    nd_byte    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 {
+    nd_uint16_t max_delay;
+    nd_byte     pad[12];
+};
+
+struct marker_tlv_marker_info_t {
+    nd_uint16_t req_port;
+    nd_mac_addr req_sys;
+    nd_uint32_t req_trans_id;
+    nd_byte     pad[2];
+};
+
+struct lacp_marker_tlv_terminator_t {
+    nd_byte     pad[50];
+};
+
+static void slow_marker_lacp_print(netdissect_options *, const u_char *, u_int, u_int);
+static void slow_oam_print(netdissect_options *, const u_char *, u_int);
+
+void
+slow_print(netdissect_options *ndo,
+           const u_char *pptr, u_int len)
+{
+    int print_version;
+    u_int subtype;
+
+    ndo->ndo_protocol = "slow";
+    if (len < 1)
+        goto tooshort;
+    subtype = GET_U_1(pptr);
+
+    /*
+     * Sanity checking of the header.
+     */
+    switch (subtype) {
+    case SLOW_PROTO_LACP:
+        if (len < 2)
+            goto tooshort;
+        if (GET_U_1(pptr + 1) != LACP_VERSION) {
+            ND_PRINT("LACP version %u packet not supported",
+                     GET_U_1(pptr + 1));
+            return;
+        }
+        print_version = 1;
+        break;
+
+    case SLOW_PROTO_MARKER:
+        if (len < 2)
+            goto tooshort;
+        if (GET_U_1(pptr + 1) != MARKER_VERSION) {
+            ND_PRINT("MARKER version %u packet not supported",
+                     GET_U_1(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("%sv%u, length %u",
+               tok2str(slow_proto_values, "unknown (%u)", subtype),
+               GET_U_1((pptr + 1)),
+               len);
+    } else {
+        /* some slow protos don't have a version number in the header */
+        ND_PRINT("%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(" (packet is too short)");
+    else
+        ND_PRINT("\n\t\t packet is too short");
+}
+
+static void
+slow_marker_lacp_print(netdissect_options *ndo,
+                       const u_char *tptr, u_int tlen,
+                       u_int proto_subtype)
+{
+    const struct tlv_header_t *tlv_header;
+    const u_char *tlv_tptr;
+    u_int tlv_type, 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 ? */
+        tlv_header = (const struct tlv_header_t *)tptr;
+        tlv_type = GET_U_1(tlv_header->type);
+        tlv_len = GET_U_1(tlv_header->length);
+
+        ND_PRINT("\n\t%s TLV (0x%02x), length %u",
+               tok2str(slow_tlv_values,
+                       "Unknown",
+                       (proto_subtype << 8) + tlv_type),
+               tlv_type,
+               tlv_len);
+
+        if (tlv_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("\n\t    ERROR: illegal length - should be >= %zu",
+                     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_TCHECK_LEN(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_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("\n\t    ERROR: illegal length - should be %zu",
+                         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("\n\t  System %s, System Priority %u, Key %u"
+                   ", Port %u, Port Priority %u\n\t  State Flags [%s]",
+                   GET_ETHERADDR_STRING(tlv_ptr.lacp_tlv_actor_partner_info->sys),
+                   GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
+                   GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->key),
+                   GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->port),
+                   GET_BE_U_2(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
+                   bittok2str(lacp_tlv_actor_partner_info_state_values,
+                              "none",
+                              GET_U_1(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("\n\t    ERROR: illegal length - should be %zu",
+                         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("\n\t  Max Delay %u",
+                   GET_BE_U_2(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("\n\t    ERROR: illegal length - should be %zu",
+                         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("\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
+                   GET_ETHERADDR_STRING(tlv_ptr.marker_tlv_marker_info->req_sys),
+                   GET_BE_U_2(tlv_ptr.marker_tlv_marker_info->req_port),
+                   GET_BE_U_4(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("\n\t\t packet is too short");
+}
+
+static void
+slow_oam_print(netdissect_options *ndo,
+               const u_char *tptr, u_int tlen)
+{
+    uint8_t code;
+    uint8_t type, length;
+    uint8_t state;
+    uint8_t command;
+    u_int hexdump;
+
+    struct slow_oam_common_header_t {
+        nd_uint16_t flags;
+        nd_uint8_t code;
+    };
+
+    struct slow_oam_tlv_header_t {
+        nd_uint8_t type;
+        nd_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_SIZE(ptr.slow_oam_common_header);
+    tptr += sizeof(struct slow_oam_common_header_t);
+    tlen -= sizeof(struct slow_oam_common_header_t);
+
+    code = GET_U_1(ptr.slow_oam_common_header->code);
+    ND_PRINT("\n\tCode %s OAM PDU, Flags [%s]",
+           tok2str(slow_oam_code_values, "Unknown (%u)", code),
+           bittok2str(slow_oam_flag_values,
+                      "none",
+                      GET_BE_U_2(ptr.slow_oam_common_header->flags)));
+
+    switch (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_SIZE(ptr.slow_oam_tlv_header);
+            type = GET_U_1(ptr.slow_oam_tlv_header->type);
+            length = GET_U_1(ptr.slow_oam_tlv_header->length);
+            ND_PRINT("\n\t  %s Information Type (%u), length %u",
+                   tok2str(slow_oam_info_type_values, "Reserved", type),
+                   type,
+                   length);
+
+            if (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 (length < sizeof(struct slow_oam_tlv_header_t)) {
+                ND_PRINT("\n\t    ERROR: illegal length - should be >= %zu",
+                         sizeof(struct slow_oam_tlv_header_t));
+                return;
+            }
+
+            if (tlen < length)
+                goto tooshort;
+            ND_TCHECK_LEN(tptr, length);
+
+            hexdump = FALSE;
+            switch (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 (GET_U_1(tlv.slow_oam_info->info_length) !=
+                    sizeof(struct slow_oam_info_t)) {
+                    ND_PRINT("\n\t    ERROR: illegal length - should be %zu",
+                           sizeof(struct slow_oam_info_t));
+                    hexdump = TRUE;
+                    goto badlength_code_info;
+                }
+
+                ND_PRINT("\n\t    OAM-Version %u, Revision %u",
+                       GET_U_1(tlv.slow_oam_info->oam_version),
+                       GET_BE_U_2(tlv.slow_oam_info->revision));
+
+                state = GET_U_1(tlv.slow_oam_info->state);
+                ND_PRINT("\n\t    State-Parser-Action %s, State-MUX-Action %s",
+                       tok2str(slow_oam_info_type_state_parser_values, "Reserved",
+                               state & OAM_INFO_TYPE_PARSER_MASK),
+                       tok2str(slow_oam_info_type_state_mux_values, "Reserved",
+                               state & OAM_INFO_TYPE_MUX_MASK));
+                ND_PRINT("\n\t    OAM-Config Flags [%s], OAM-PDU-Config max-PDU size %u",
+                       bittok2str(slow_oam_info_type_oam_config_values, "none",
+                                  GET_U_1(tlv.slow_oam_info->oam_config)),
+                       GET_BE_U_2(tlv.slow_oam_info->oam_pdu_config) &
+                       OAM_INFO_TYPE_PDU_SIZE_MASK);
+                ND_PRINT("\n\t    OUI %s (0x%06x), Vendor-Private 0x%08x",
+                       tok2str(oui_values, "Unknown",
+                               GET_BE_U_3(tlv.slow_oam_info->oui)),
+                       GET_BE_U_3(tlv.slow_oam_info->oui),
+                       GET_BE_U_4(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  ",
+                                   length);
+            }
+
+            tlen -= length;
+            tptr += length;
+        }
+        break;
+
+    case SLOW_OAM_CODE_EVENT_NOTIF:
+        /* Sequence number */
+        if (tlen < 2)
+            goto tooshort;
+        ND_PRINT("\n\t  Sequence Number %u", GET_BE_U_2(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;
+            type = GET_U_1(ptr.slow_oam_tlv_header->type);
+            length = GET_U_1(ptr.slow_oam_tlv_header->length);
+            ND_PRINT("\n\t  %s Link Event Type (%u), length %u",
+                   tok2str(slow_oam_link_event_values, "Reserved",
+                           type),
+                   type,
+                   length);
+
+            if (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 (length < sizeof(struct slow_oam_tlv_header_t)) {
+                ND_PRINT("\n\t    ERROR: illegal length - should be >= %zu",
+                         sizeof(struct slow_oam_tlv_header_t));
+                return;
+            }
+
+            if (tlen < length)
+                goto tooshort;
+            ND_TCHECK_LEN(tptr, length);
+
+            hexdump = FALSE;
+            switch (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 (GET_U_1(tlv.slow_oam_link_event->event_length) !=
+                    sizeof(struct slow_oam_link_event_t)) {
+                    ND_PRINT("\n\t    ERROR: illegal length - should be %zu",
+                             sizeof(struct slow_oam_link_event_t));
+                    hexdump = TRUE;
+                    goto badlength_event_notif;
+                }
+
+                ND_PRINT("\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",
+                       GET_BE_U_2(tlv.slow_oam_link_event->time_stamp)*100,
+                       GET_BE_U_8(tlv.slow_oam_link_event->window),
+                       GET_BE_U_8(tlv.slow_oam_link_event->threshold),
+                       GET_BE_U_8(tlv.slow_oam_link_event->errors),
+                       GET_BE_U_8(tlv.slow_oam_link_event->errors_running_total),
+                       GET_BE_U_4(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  ",
+                                   length);
+            }
+
+            tlen -= length;
+            tptr += 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;
+        command = GET_U_1(tlv.slow_oam_loopbackctrl->command);
+        ND_PRINT("\n\t  Command %s (%u)",
+               tok2str(slow_oam_loopbackctrl_cmd_values,
+                       "Unknown",
+                       command),
+               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("\n\t\t packet is too short");
+}