forked from osmocom/wireshark
1660 lines
41 KiB
C
1660 lines
41 KiB
C
/* packet-nlsp.c
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* Routines for NetWare Link Services Protocol
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*
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* $Id: packet-nlsp.c,v 1.7 2003/10/06 08:35:30 guy Exp $
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*
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* Based on ISIS dissector by Stuart Stanley <stuarts@mxmail.net>
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include "packet-ipx.h"
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/* NLSP base header */
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static int proto_nlsp = -1;
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static int hf_nlsp_irpd = -1;
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static int hf_nlsp_header_length = -1;
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static int hf_nlsp_minor_version = -1;
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static int hf_nlsp_nr = -1;
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static int hf_nlsp_type = -1;
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static int hf_nlsp_major_version = -1;
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static int hf_nlsp_packet_length = -1;
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static int hf_nlsp_hello_state = -1;
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static int hf_nlsp_hello_multicast = -1;
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static int hf_nlsp_hello_circuit_type = -1;
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static int hf_nlsp_hello_holding_timer = -1;
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static int hf_nlsp_hello_priority = -1;
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static int hf_nlsp_lsp_sequence_number = -1;
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static int hf_nlsp_lsp_checksum = -1;
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static int hf_nlsp_lsp_p = -1;
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static int hf_nlsp_lsp_attached_flag = -1;
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static int hf_nlsp_lsp_lspdbol = -1;
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static int hf_nlsp_lsp_router_type = -1;
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static gint ett_nlsp = -1;
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static gint ett_nlsp_hello_clv_area_addr = -1;
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static gint ett_nlsp_hello_clv_neighbors = -1;
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static gint ett_nlsp_hello_local_mtu = -1;
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static gint ett_nlsp_hello_clv_unknown = -1;
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static gint ett_nlsp_lsp_info = -1;
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static gint ett_nlsp_lsp_clv_area_addr = -1;
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static gint ett_nlsp_lsp_clv_mgt_info = -1;
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static gint ett_nlsp_lsp_clv_link_info = -1;
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static gint ett_nlsp_lsp_clv_svcs_info = -1;
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static gint ett_nlsp_lsp_clv_ext_routes = -1;
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static gint ett_nlsp_lsp_clv_unknown = -1;
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static gint ett_nlsp_csnp_lsp_entries = -1;
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static gint ett_nlsp_csnp_lsp_entry = -1;
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static gint ett_nlsp_csnp_clv_unknown = -1;
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static gint ett_nlsp_psnp_lsp_entries = -1;
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static gint ett_nlsp_psnp_lsp_entry = -1;
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static gint ett_nlsp_psnp_clv_unknown = -1;
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#define PACKET_TYPE_MASK 0x1f
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/*
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* See
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*
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* http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/nlsp.htm
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*
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* for some information about Hello packets.
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*/
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#define NLSP_TYPE_L1_HELLO 15
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#define NLSP_TYPE_WAN_HELLO 17
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#define NLSP_TYPE_L1_LSP 18
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#define NLSP_TYPE_L1_CSNP 24
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#define NLSP_TYPE_L1_PSNP 26
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static const value_string nlsp_packet_type_vals[] = {
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{ NLSP_TYPE_L1_HELLO, "L1 Hello"},
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{ NLSP_TYPE_WAN_HELLO, "WAN Hello"},
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{ NLSP_TYPE_L1_LSP, "L1 LSP"},
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{ NLSP_TYPE_L1_CSNP, "L1 CSNP"},
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{ NLSP_TYPE_L1_PSNP, "L1 PSNP"},
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{ 0, NULL}
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};
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static const value_string nlsp_attached_flag_vals[] = {
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{ 0, "Other routing areas cannot be reached through this router"},
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{ 1, "Other routing areas can be reached through this router"},
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{ 0, NULL}
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};
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static const value_string nlsp_router_type_vals[] = {
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{ 1, "Level 1 Router"},
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{ 3, "Level 1 and Level 2 Router"},
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{ 0, NULL}
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};
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static const true_false_string supported_string = {
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"Supported",
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"Unsupported"
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};
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/*
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* Our sub-packet dismantle structure for CLV's
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*/
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typedef struct {
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int optcode; /* code for option */
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char *tree_text; /* text for fold out */
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gint *tree_id; /* id for add_item */
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void (*dissect)(tvbuff_t *tvb, proto_tree *tree,
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int offset, int length);
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} nlsp_clv_handle_t;
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/*
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* Name: nlsp_dissect_unknown()
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*
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* Description:
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* There was some error in the protocol and we are in unknown space
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* here. Add a tree item to cover the error and go on. Note
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* that we make sure we don't go off the end of the bleedin packet here!
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*
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* Input
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* tvbuff_t * : tvbuffer for packet data
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* proto_tree * : tree of display data. May be NULL.
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* int : current offset into packet data
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* char * : format text
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* subsequent args : arguments to format
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*
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* Output:
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* void (may modify proto tree)
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*/
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void
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nlsp_dissect_unknown(tvbuff_t *tvb, proto_tree *tree, int offset,
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char *fmat, ...)
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{
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va_list ap;
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va_start(ap, fmat);
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proto_tree_add_text_valist(tree, tvb, offset, -1, fmat, ap);
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va_end(ap);
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}
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/*
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* Name: nlsp_dissect_clvs()
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*
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* Description:
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* Dispatch routine to shred all the CLVs in a packet. We just
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* walk through the clv entries in the packet. For each one, we
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* search the passed in valid clv's for this protocol (opts) for
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* a matching code. If found, we add to the display tree and
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* then call the dissector. If it is not, we just post an
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* "unknown" clv entry using the passed in unknown clv tree id.
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*
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* Input:
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* tvbuff_t * : tvbuffer for packet data
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* proto_tree * : protocol display tree to fill out. May be NULL
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* int : offset into packet data where we are.
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* nlsp_clv_handle_t * : NULL dissector terminated array of codes
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* and handlers (along with tree text and tree id's).
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* int : length of CLV area.
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* int : unknown clv tree id
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*
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* Output:
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* void, but we will add to proto tree if !NULL.
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*/
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static void
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nlsp_dissect_clvs(tvbuff_t *tvb, proto_tree *tree, int offset,
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const nlsp_clv_handle_t *opts, int len, int unknown_tree_id)
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{
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guint8 code;
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guint8 length;
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int q;
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proto_item *ti;
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proto_tree *clv_tree;
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int adj;
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while ( len > 0 ) {
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code = tvb_get_guint8(tvb, offset);
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offset += 1;
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length = tvb_get_guint8(tvb, offset);
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offset += 1;
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adj = (sizeof(code) + sizeof(length) + length);
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len -= adj;
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if ( len < 0 ) {
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nlsp_dissect_unknown(tvb, tree, offset,
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"Short CLV header (%d vs %d)",
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adj, len + adj );
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return;
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}
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q = 0;
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while ((opts[q].dissect != NULL )&&( opts[q].optcode != code )){
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q++;
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}
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if ( opts[q].dissect ) {
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if (tree) {
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/* adjust by 2 for code/len octets */
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ti = proto_tree_add_text(tree, tvb, offset - 2,
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length + 2, "%s (%u)",
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opts[q].tree_text, length );
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clv_tree = proto_item_add_subtree(ti,
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*opts[q].tree_id );
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} else {
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clv_tree = NULL;
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}
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opts[q].dissect(tvb, clv_tree, offset,
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length);
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} else {
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if (tree) {
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ti = proto_tree_add_text(tree, tvb, offset - 2,
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length + 2, "Unknown code %u (%u)",
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code, length);
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clv_tree = proto_item_add_subtree(ti,
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unknown_tree_id );
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} else {
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clv_tree = NULL;
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}
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}
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offset += length;
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}
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}
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/*
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* Name: dissect_area_address_clv()
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*
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* Description:
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* Decode an area address clv.
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*
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* Input:
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* tvbuff_t * : tvbuffer for packet data
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* proto_tree * : protocol display tree to fill out. May be NULL
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* int : offset into packet data where we are.
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* int : length of clv we are decoding
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*
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* Output:
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* void, but we will add to proto tree if !NULL.
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*/
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static void
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dissect_area_address_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
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int length)
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{
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while (length > 0) {
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if (length < 4) {
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nlsp_dissect_unknown(tvb, tree, offset,
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"Short area address entry");
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return;
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}
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if (tree) {
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proto_tree_add_text(tree, tvb, offset, 4,
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"Area address network number: 0x%08x",
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tvb_get_ntohl(tvb, offset));
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}
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offset += 4;
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length -= 4;
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if (length < 4) {
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nlsp_dissect_unknown(tvb, tree, offset,
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"Short area address entry");
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return;
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}
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if (tree) {
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proto_tree_add_text(tree, tvb, offset, 4,
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"Area address mask: 0x%08x",
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tvb_get_ntohl(tvb, offset));
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}
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offset += 4;
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length -= 4;
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}
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}
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/*
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* Name: dissect_neighbor_clv()
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*
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* Description:
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* Decode an neighbor clv.
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*
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* Input:
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* tvbuff_t * : tvbuffer for packet data
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* proto_tree * : protocol display tree to fill out. May be NULL
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* int : offset into packet data where we are.
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* int : length of clv we are decoding
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*
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* Output:
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* void, but we will add to proto tree if !NULL.
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*/
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static void
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dissect_neighbor_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
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int length)
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{
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while (length > 0) {
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if (length < 6) {
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nlsp_dissect_unknown(tvb, tree, offset,
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"Short neighbor entry");
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return;
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}
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if (tree) {
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proto_tree_add_text(tree, tvb, offset, 6,
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"Neighbor: %s",
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ether_to_str(tvb_get_ptr(tvb, offset, 6)));
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}
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offset += 6;
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length -= 6;
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}
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}
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/*
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* Name: dissect_hello_local_mtu_clv()
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*
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* Description:
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* Decode for a hello packet's local MTU clv.
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*
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* Input:
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* tvbuff_t * : tvbuffer for packet data
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* proto_tree * : protocol display tree to fill out. May be NULL
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* int : offset into packet data where we are.
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* int : length of clv we are decoding
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*
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* Output:
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* void, but we will add to proto tree if !NULL.
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*/
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static void
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dissect_hello_local_mtu_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
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int length)
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{
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if (length < 4) {
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nlsp_dissect_unknown(tvb, tree, offset,
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"Short link info entry");
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return;
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}
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if (tree) {
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proto_tree_add_text(tree, tvb, offset, 4,
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"MTU Size: %u",
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tvb_get_ntohl(tvb, offset));
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}
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offset += 4;
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length -= 4;
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}
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static const nlsp_clv_handle_t clv_hello_opts[] = {
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{
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0xC0,
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"Area address(es)",
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&ett_nlsp_hello_clv_area_addr,
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dissect_area_address_clv
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},
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{
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6,
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"Neighbors",
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&ett_nlsp_hello_clv_neighbors,
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dissect_neighbor_clv
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},
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{
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0xC5,
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"Local MTU",
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&ett_nlsp_hello_local_mtu,
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dissect_hello_local_mtu_clv
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},
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{
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0,
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"",
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NULL,
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NULL
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}
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};
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/*
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* Name: nlsp_dissect_nlsp_hello()
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*
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* Description:
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* This procedure rips apart NLSP hellos.
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*
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* Input:
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* tvbuff_t * : tvbuffer for packet data
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* proto_tree * : protocol display tree to add to. May be NULL.
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* int offset : our offset into packet data.
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* int : hello type, a la NLSP_TYPE_* values
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* int : header length of packet.
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*
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* Output:
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* void, will modify proto_tree if not NULL.
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*/
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#define NLSP_HELLO_CTYPE_MASK 0x03
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#define NLSP_HELLO_STATE_MASK 0xC0
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#define NLSP_HELLO_MULTICAST_MASK 0x10
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static const value_string nlsp_hello_state_vals[] = {
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{ 0, "Up" },
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{ 1, "Initializing" },
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{ 2, "Down" },
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{ 0, NULL }
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};
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#define NLSP_HELLO_TYPE_RESERVED 0
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#define NLSP_HELLO_TYPE_LEVEL_1 1
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#define NLSP_HELLO_TYPE_LEVEL_2 2
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#define NLSP_HELLO_TYPE_LEVEL_12 3
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static const value_string nlsp_hello_circuit_type_vals[] = {
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{ NLSP_HELLO_TYPE_RESERVED, "Reserved 0 (discard PDU)"},
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{ NLSP_HELLO_TYPE_LEVEL_1, "Level 1 only"},
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{ NLSP_HELLO_TYPE_LEVEL_2, "Level 2 only"},
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{ NLSP_HELLO_TYPE_LEVEL_12, "Level 1 and 2"},
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{ 0, NULL}
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};
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#define NLSP_HELLO_PRIORITY_MASK 0x7f
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static void
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nlsp_dissect_nlsp_hello(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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int offset, int hello_type, int header_length)
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{
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guint16 packet_length;
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int len;
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guint16 holding_timer;
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if (tree) {
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if (hello_type == NLSP_TYPE_WAN_HELLO) {
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proto_tree_add_item(tree, hf_nlsp_hello_state, tvb,
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offset, 1, FALSE);
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} else {
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proto_tree_add_item(tree, hf_nlsp_hello_multicast, tvb,
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offset, 1, FALSE);
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}
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proto_tree_add_item(tree, hf_nlsp_hello_circuit_type, tvb,
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offset, 1, FALSE);
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}
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offset += 1;
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if (tree) {
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proto_tree_add_text(tree, tvb, offset, 6,
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"Sending Router System ID: %s",
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ether_to_str(tvb_get_ptr(tvb, offset, 6)));
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_append_fstr(pinfo->cinfo, COL_INFO, ", System ID: %s",
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ether_to_str(tvb_get_ptr(tvb, offset, 6)));
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}
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offset += 6;
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if (tree) {
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holding_timer = tvb_get_ntohs(tvb, offset);
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proto_tree_add_uint_format(tree, hf_nlsp_hello_holding_timer,
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tvb, offset, 2, holding_timer,
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"Holding Timer: %us", holding_timer);
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}
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offset += 2;
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packet_length = tvb_get_ntohs(tvb, offset);
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if (tree) {
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proto_tree_add_uint(tree, hf_nlsp_packet_length, tvb,
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offset, 2, packet_length);
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}
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offset += 2;
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if (tree) {
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proto_tree_add_item(tree, hf_nlsp_hello_priority, tvb,
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offset, 1, FALSE);
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}
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offset += 1;
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if (hello_type == NLSP_TYPE_WAN_HELLO) {
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if (tree) {
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proto_tree_add_text(tree, tvb, offset, 1,
|
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"Local WAN Circuit ID: %u",
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tvb_get_guint8(tvb, offset));
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}
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offset += 1;
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} else {
|
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if (tree) {
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proto_tree_add_text(tree, tvb, offset, 6,
|
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"Designated Router System ID: %s",
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ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
proto_tree_add_text(tree, tvb, offset+6, 1,
|
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"Designated Router Pseudonode ID: %u",
|
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tvb_get_guint8(tvb, offset+6));
|
|
}
|
|
offset += 7;
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}
|
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|
|
len = packet_length - header_length;
|
|
if (len < 0) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"packet header length %d went beyond packet",
|
|
header_length);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Now, we need to decode our CLVs. We need to pass in
|
|
* our list of valid ones!
|
|
*/
|
|
nlsp_dissect_clvs(tvb, tree, offset,
|
|
clv_hello_opts, len, ett_nlsp_hello_clv_unknown);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_mgt_info_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packet's management information clv.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_mgt_info_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int length)
|
|
{
|
|
guint8 name_length;
|
|
|
|
if (length < 4) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short management info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Network number: 0x%08x",
|
|
tvb_get_ntohl(tvb, offset));
|
|
}
|
|
offset += 4;
|
|
length -= 4;
|
|
|
|
if (length < 6) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short management info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 6,
|
|
"Node number: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
offset += 6;
|
|
length -= 6;
|
|
|
|
if (length < 1) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short management info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"IPX version number: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
length -= 1;
|
|
|
|
if (length < 1) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short management info entry");
|
|
return;
|
|
}
|
|
name_length = tvb_get_guint8(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Name length: %u", name_length);
|
|
}
|
|
offset += 1;
|
|
length -= 1;
|
|
|
|
if (name_length != 0) {
|
|
if (length < name_length) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short management info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, name_length,
|
|
"Name: %s",
|
|
tvb_format_text(tvb, offset, name_length));
|
|
}
|
|
offset += name_length;
|
|
length -= name_length;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_link_info_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packet's link information clv.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static const value_string media_type_vals[] = {
|
|
{ 0x0000, "Generic LAN" },
|
|
{ 0x8000, "Generic WAN" },
|
|
{ 0x0001, "Localtalk" },
|
|
{ 0x0002, "Ethernet II" },
|
|
{ 0x0003, "IEEE 802.3 with IEEE 802.2 without SNAP" },
|
|
{ 0x0005, "IEEE 802.3 with IPX header and no 802.2 header" },
|
|
{ 0x000A, "IEEE 802.3 with IEEE 802.2 and SNAP" },
|
|
{ 0x0004, "IEEE 802.5 with IEEE 802.2 without SNAP" },
|
|
{ 0x000B, "IEEE 802.5 with IEEE 802.2 and SNAP" },
|
|
{ 0x0006, "IEEE 802.4" },
|
|
{ 0x0007, "IBM PC Network II" },
|
|
{ 0x0008, "Gateway G/Net" },
|
|
{ 0x0009, "Proteon ProNET" },
|
|
{ 0x000C, "Racore LANPAC" },
|
|
{ 0x800D, "ISDN" },
|
|
{ 0x000E, "ARCnet" },
|
|
{ 0x000F, "IBM PC Network II with 802.2 without SNAP" },
|
|
{ 0x0010, "IBM PC Network II with 802.2 and SNAP" },
|
|
{ 0x0011, "Corvus OmniNet at 4 Mbps" },
|
|
{ 0x0012, "Harris Adacom" },
|
|
{ 0x0013, "IP tunnel" },
|
|
{ 0x8013, "IP Relay" },
|
|
{ 0x0014, "FDDI with 802.2 without SNAP" },
|
|
{ 0x0015, "Commtex IVDLAN" },
|
|
{ 0x0016, "Dataco OSI" },
|
|
{ 0x0017, "FDDI with 802.2 and SNAP" },
|
|
{ 0x0018, "IBM SDLC tunnel" },
|
|
{ 0x0019, "PC Office frame" },
|
|
{ 0x001A, "Hypercommunications WAIDNET" },
|
|
{ 0x801C, "PPP" },
|
|
{ 0x801D, "Proxim RangeLAN" },
|
|
{ 0x801E, "X.25" },
|
|
{ 0x801F, "Frame Relay" },
|
|
{ 0x0020, "Integrated Workstations BUS-NET" },
|
|
{ 0x8021, "Novell SNA Links" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_lsp_link_info_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int length)
|
|
{
|
|
guint8 flags_cost;
|
|
|
|
if (length < 1) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short link info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
flags_cost = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
decode_boolean_bitfield(flags_cost, 0x80, 1*8,
|
|
"Cost not present", "Cost present"));
|
|
if (!(flags_cost & 0x80)) {
|
|
/*
|
|
* 0x80 clear => cost present.
|
|
*/
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
decode_boolean_bitfield(flags_cost, 0x40, 1*8,
|
|
"Cost is internal metric",
|
|
"Cost is external metric"));
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
decode_numeric_bitfield(flags_cost, 0x3F, 1*8,
|
|
"Cost = %u"));
|
|
}
|
|
}
|
|
offset += 1;
|
|
length -= 1;
|
|
|
|
if (length < 3) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short link info entry");
|
|
return;
|
|
}
|
|
offset += 3; /* Reserved */
|
|
length -= 3;
|
|
|
|
if (length < 7) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short link info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 6,
|
|
"Router System ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
proto_tree_add_text(tree, tvb, offset+6, 1,
|
|
"Router Pseudonode ID: %u",
|
|
tvb_get_guint8(tvb, offset+6));
|
|
}
|
|
offset += 7;
|
|
length -= 7;
|
|
|
|
if (length < 4) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short link info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"MTU Size: %u",
|
|
tvb_get_ntohl(tvb, offset));
|
|
}
|
|
offset += 4;
|
|
length -= 4;
|
|
|
|
if (length < 4) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short link info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Delay: %uus",
|
|
tvb_get_ntohl(tvb, offset));
|
|
}
|
|
offset += 4;
|
|
length -= 4;
|
|
|
|
if (length < 4) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short link info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Throughput: %u bits/s",
|
|
tvb_get_ntohl(tvb, offset));
|
|
}
|
|
offset += 4;
|
|
length -= 4;
|
|
|
|
if (length < 2) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short link info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Media type: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), media_type_vals,
|
|
"Unknown (0x%04x)"));
|
|
}
|
|
offset += 2;
|
|
length -= 2;
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_svcs_info_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packet's services information clv.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_svcs_info_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int length)
|
|
{
|
|
if (length < 1) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short services info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Hops to reach the service: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
length -= 1;
|
|
|
|
if (length < 4) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short services info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Network number: 0x%08x",
|
|
tvb_get_ntohl(tvb, offset));
|
|
}
|
|
offset += 4;
|
|
length -= 4;
|
|
|
|
if (length < 6) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short services info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 6,
|
|
"Node number: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
offset += 6;
|
|
length -= 6;
|
|
|
|
if (length < 2) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short services info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Socket: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), ipx_socket_vals,
|
|
"Unknown (0x%04x)"));
|
|
}
|
|
offset += 2;
|
|
length -= 2;
|
|
|
|
if (length < 2) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short services info entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Type: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), server_vals,
|
|
"Unknown (0x%04x)"));
|
|
}
|
|
offset += 2;
|
|
length -= 2;
|
|
|
|
if (length > 0) {
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Service Name: %s",
|
|
tvb_format_text(tvb, offset, length));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Name: dissect_lsp_ext_routes_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packet's external routes clv.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_ext_routes_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int length)
|
|
{
|
|
while (length > 0) {
|
|
if (length < 1) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short external routes entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Hops: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
length -= 1;
|
|
|
|
if (length < 4) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short external routes entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Network number: 0x%08x",
|
|
tvb_get_ntohl(tvb, offset));
|
|
}
|
|
offset += 4;
|
|
length -= 4;
|
|
|
|
if (length < 2) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short external routes entry");
|
|
return;
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"RIP delay: %u ticks",
|
|
tvb_get_ntohs(tvb, offset));
|
|
}
|
|
offset += 2;
|
|
length -= 2;
|
|
}
|
|
}
|
|
|
|
static const nlsp_clv_handle_t clv_l1_lsp_opts[] = {
|
|
{
|
|
0xC0,
|
|
"Area address(es)",
|
|
&ett_nlsp_lsp_clv_area_addr,
|
|
dissect_area_address_clv
|
|
},
|
|
{
|
|
0xC1,
|
|
"Management information",
|
|
&ett_nlsp_lsp_clv_mgt_info,
|
|
dissect_lsp_mgt_info_clv
|
|
},
|
|
{
|
|
0xC2,
|
|
"Link information",
|
|
&ett_nlsp_lsp_clv_link_info,
|
|
dissect_lsp_link_info_clv
|
|
},
|
|
{
|
|
0xC3,
|
|
"Services information",
|
|
&ett_nlsp_lsp_clv_svcs_info,
|
|
dissect_lsp_svcs_info_clv
|
|
},
|
|
{
|
|
0xC4,
|
|
"External routes",
|
|
&ett_nlsp_lsp_clv_ext_routes,
|
|
dissect_lsp_ext_routes_clv
|
|
},
|
|
|
|
{
|
|
0,
|
|
"",
|
|
NULL,
|
|
NULL
|
|
}
|
|
};
|
|
|
|
/*
|
|
* Name: nlsp_dissect_nlsp_lsp()
|
|
*
|
|
* Description:
|
|
* Print out the LSP part of the main header and then call the CLV
|
|
* de-mangler with the right list of valid CLVs.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to add to. May be NULL.
|
|
* int offset : our offset into packet data.
|
|
* int : header length of packet.
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
/* P | ATT | OVERFLOW | ROUTER TYPE FIELD description */
|
|
#define NLSP_LSP_PARTITION_MASK 0x80
|
|
#define NLSP_LSP_PARTITION_SHIFT 7
|
|
#define NLSP_LSP_PARTITION(info) (((info) & NLSP_LSP_PARTITION_MASK) >> NLSP_LSP_PARTITION_SHIFT)
|
|
|
|
#define NLSP_LSP_ATT_MASK 0x78
|
|
#define NLSP_LSP_ATT_SHIFT 3
|
|
#define NLSP_LSP_ATT(info) (((info) & NLSP_LSP_ATT_MASK) >> NLSP_LSP_ATT_SHIFT)
|
|
|
|
#define NLSP_LSP_OVERFLOW_MASK 0x04
|
|
#define NLSP_LSP_OVERFLOW_SHIFT 2
|
|
#define NLSP_LSP_OVERFLOW(info) (((info) & NLSP_LSP_OVERFLOW_MASK) >> NLSP_LSP_OVERFLOW_SHIFT)
|
|
|
|
#define NLSP_LSP_ROUTER_TYPE_MASK 0x03
|
|
#define NLSP_LSP_ROUTER_TYPE(info) ((info) & NLSP_LSP_ROUTER_TYPE_MASK)
|
|
|
|
static void
|
|
nlsp_dissect_nlsp_lsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, int header_length)
|
|
{
|
|
guint16 packet_length;
|
|
guint16 remaining_lifetime;
|
|
guint32 sequence_number;
|
|
int len;
|
|
|
|
packet_length = tvb_get_ntohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(tree, hf_nlsp_packet_length, tvb,
|
|
offset, 2, packet_length);
|
|
}
|
|
offset += 2;
|
|
|
|
remaining_lifetime = tvb_get_ntohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Remaining Lifetime: %us",
|
|
remaining_lifetime);
|
|
}
|
|
offset += 2;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", LSP ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 6,
|
|
"LSP ID system ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
offset += 6;
|
|
/* XXX - append the pseudonode ID */
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"LSP ID pseudonode ID: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"LSP ID LSP number: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
|
|
sequence_number = tvb_get_ntohl(tvb, offset);
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
", Sequence: 0x%08x, Lifetime: %us",
|
|
sequence_number, remaining_lifetime);
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_uint(tree, hf_nlsp_lsp_sequence_number, tvb,
|
|
offset, 4, sequence_number);
|
|
}
|
|
offset += 4;
|
|
|
|
if (tree) {
|
|
/* XXX -> we could validate the cksum here! */
|
|
proto_tree_add_item(tree, hf_nlsp_lsp_checksum, tvb,
|
|
offset, 2, FALSE );
|
|
}
|
|
offset += 2;
|
|
|
|
if (tree) {
|
|
proto_tree_add_item(tree, hf_nlsp_lsp_p, tvb,
|
|
offset, 1, FALSE);
|
|
proto_tree_add_item(tree, hf_nlsp_lsp_attached_flag, tvb,
|
|
offset, 1, FALSE);
|
|
proto_tree_add_item(tree, hf_nlsp_lsp_lspdbol, tvb,
|
|
offset, 1, FALSE);
|
|
proto_tree_add_item(tree, hf_nlsp_lsp_router_type, tvb,
|
|
offset, 1, FALSE);
|
|
}
|
|
offset += 1;
|
|
|
|
len = packet_length - header_length;
|
|
if (len < 0) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"packet header length %d went beyond packet",
|
|
header_length);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Now, we need to decode our CLVs. We need to pass in
|
|
* our list of valid ones!
|
|
*/
|
|
nlsp_dissect_clvs(tvb, tree, offset,
|
|
clv_l1_lsp_opts, len, ett_nlsp_lsp_clv_unknown);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_snp_lsp_entries()
|
|
*
|
|
* Description:
|
|
* All the snp packets use a common payload format. We have up
|
|
* to n entries (based on length), which are made of:
|
|
* 2 : remaining life time
|
|
* 8 : lsp id
|
|
* 4 : sequence number
|
|
* 2 : checksum
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of payload to decode.
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_csnp_lsp_entries(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int length)
|
|
{
|
|
proto_tree *subtree,*ti;
|
|
|
|
while (length > 0) {
|
|
if (length < 16) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short CSNP header entry");
|
|
return;
|
|
}
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, 16,
|
|
"LSP-ID: %s, Sequence: 0x%08x, Lifetime: %5us, Checksum: 0x%04x",
|
|
ether_to_str(tvb_get_ptr(tvb, offset+2, 6)), /* XXX - rest of system ID */
|
|
tvb_get_ntohl(tvb, offset+10),
|
|
tvb_get_ntohs(tvb, offset),
|
|
tvb_get_ntohs(tvb, offset+14));
|
|
|
|
subtree = proto_item_add_subtree(ti, ett_nlsp_csnp_lsp_entry);
|
|
|
|
proto_tree_add_text(subtree, tvb, offset+2, 6,
|
|
"LSP ID source ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset+2, 6)));
|
|
proto_tree_add_text(subtree, tvb, offset+8, 1,
|
|
"LSP ID pseudonode ID: %u",
|
|
tvb_get_guint8(tvb, offset+8));
|
|
proto_tree_add_text(subtree, tvb, offset+9, 1,
|
|
"LSP ID LSP number: %u",
|
|
tvb_get_guint8(tvb, offset+9));
|
|
|
|
proto_tree_add_text(subtree, tvb, offset+10, 4,
|
|
"LSP Sequence Number: 0x%08x",
|
|
tvb_get_ntohl(tvb, offset+10));
|
|
|
|
proto_tree_add_text(subtree, tvb, offset, 2,
|
|
"Remaining Lifetime: %us",
|
|
tvb_get_ntohs(tvb, offset));
|
|
|
|
proto_tree_add_text(subtree, tvb, offset+14, 2,
|
|
"LSP checksum: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset+14));
|
|
|
|
length -= 16;
|
|
offset += 16;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_psnp_lsp_entries(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int length)
|
|
{
|
|
proto_tree *subtree,*ti;
|
|
|
|
while (length > 0) {
|
|
if (length < 16) {
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Short PSNP header entry");
|
|
return;
|
|
}
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, 16,
|
|
"LSP-ID: %s, Sequence: 0x%08x, Lifetime: %5us, Checksum: 0x%04x",
|
|
ether_to_str(tvb_get_ptr(tvb, offset+2, 6)), /* XXX - rest of system ID */
|
|
tvb_get_ntohl(tvb, offset+10),
|
|
tvb_get_ntohs(tvb, offset),
|
|
tvb_get_ntohs(tvb, offset+14));
|
|
|
|
subtree = proto_item_add_subtree(ti, ett_nlsp_psnp_lsp_entry);
|
|
|
|
proto_tree_add_text(subtree, tvb, offset+2, 6,
|
|
"LSP ID source ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset+2, 6)));
|
|
proto_tree_add_text(subtree, tvb, offset+8, 1,
|
|
"LSP ID pseudonode ID: %u",
|
|
tvb_get_guint8(tvb, offset+8));
|
|
proto_tree_add_text(subtree, tvb, offset+9, 1,
|
|
"LSP ID LSP number: %u",
|
|
tvb_get_guint8(tvb, offset+9));
|
|
|
|
proto_tree_add_text(subtree, tvb, offset+10, 4,
|
|
"LSP Sequence Number: 0x%08x",
|
|
tvb_get_ntohl(tvb, offset+10));
|
|
|
|
proto_tree_add_text(subtree, tvb, offset, 2,
|
|
"Remaining Lifetime: %us",
|
|
tvb_get_ntohs(tvb, offset));
|
|
|
|
proto_tree_add_text(subtree, tvb, offset+14, 2,
|
|
"LSP checksum: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset+14));
|
|
|
|
length -= 16;
|
|
offset += 16;
|
|
}
|
|
}
|
|
|
|
static const nlsp_clv_handle_t clv_l1_csnp_opts[] = {
|
|
{
|
|
9,
|
|
"LSP entries",
|
|
&ett_nlsp_csnp_lsp_entries,
|
|
dissect_csnp_lsp_entries
|
|
},
|
|
|
|
{
|
|
0,
|
|
"",
|
|
NULL,
|
|
NULL
|
|
}
|
|
};
|
|
|
|
/*
|
|
* Name: nlsp_dissect_nlsp_csnp()
|
|
*
|
|
* Description:
|
|
* Tear apart a L1 CSNP header and then call into payload dissect
|
|
* to pull apart the lsp id payload.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to add to. May be NULL.
|
|
* int offset : our offset into packet data.
|
|
* int : header length of packet.
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
nlsp_dissect_nlsp_csnp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, int header_length)
|
|
{
|
|
guint16 packet_length;
|
|
int len;
|
|
|
|
packet_length = tvb_get_ntohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(tree, hf_nlsp_packet_length, tvb,
|
|
offset, 2, packet_length);
|
|
}
|
|
offset += 2;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Source ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 6,
|
|
"Source ID system ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
offset += 6;
|
|
/* XXX - add the pseudonode ID */
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Source ID pseudonode ID: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Start LSP ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 6,
|
|
"Start LSP ID source ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
offset += 6;
|
|
/* XXX - append the pseudonode ID */
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Start LSP ID pseudonode ID: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Start LSP ID LSP number: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", End LSP ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 6,
|
|
"End LSP ID source ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
offset += 6;
|
|
/* XXX - append the pseudonode ID */
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"End LSP ID pseudonode ID: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"End LSP ID LSP number: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
|
|
len = packet_length - header_length;
|
|
if (len < 0) {
|
|
return;
|
|
}
|
|
/* Call into payload dissector */
|
|
nlsp_dissect_clvs(tvb, tree, offset,
|
|
clv_l1_csnp_opts, len, ett_nlsp_csnp_clv_unknown);
|
|
}
|
|
|
|
static const nlsp_clv_handle_t clv_l1_psnp_opts[] = {
|
|
{
|
|
9,
|
|
"LSP entries",
|
|
&ett_nlsp_psnp_lsp_entries,
|
|
dissect_psnp_lsp_entries
|
|
},
|
|
|
|
{
|
|
0,
|
|
"",
|
|
NULL,
|
|
NULL
|
|
}
|
|
};
|
|
|
|
/*
|
|
* Name: nlsp_dissect_nlsp_psnp()
|
|
*
|
|
* Description:
|
|
* Tear apart a L1 PSNP header and then call into payload dissect
|
|
* to pull apart the lsp id payload.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to add to. May be NULL.
|
|
* int offset : our offset into packet data.
|
|
* int : header length of packet.
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
nlsp_dissect_nlsp_psnp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, int header_length)
|
|
{
|
|
guint16 packet_length;
|
|
int len;
|
|
|
|
packet_length = tvb_get_ntohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(tree, hf_nlsp_packet_length, tvb,
|
|
offset, 2, packet_length);
|
|
}
|
|
offset += 2;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Source ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 6,
|
|
"Source ID system ID: %s",
|
|
ether_to_str(tvb_get_ptr(tvb, offset, 6)));
|
|
}
|
|
offset += 6;
|
|
/* XXX - add the pseudonode ID */
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Source ID pseudonode ID: %u",
|
|
tvb_get_guint8(tvb, offset));
|
|
}
|
|
offset += 1;
|
|
|
|
len = packet_length - header_length;
|
|
if (len < 0) {
|
|
return;
|
|
}
|
|
/* Call into payload dissector */
|
|
nlsp_dissect_clvs(tvb, tree, offset,
|
|
clv_l1_psnp_opts, len, ett_nlsp_psnp_clv_unknown);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_nlsp()
|
|
*
|
|
* Description:
|
|
* Main entry area for nlsp de-mangling. This will build the
|
|
* main nlsp tree data and call the sub-protocols as needed.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* packet_info * : info for current packet
|
|
* proto_tree * : tree of display data. May be NULL.
|
|
*
|
|
* Output:
|
|
* void, but we will add to the proto_tree if it is not NULL.
|
|
*/
|
|
static void
|
|
dissect_nlsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *nlsp_tree = NULL;
|
|
int offset = 0;
|
|
guint8 nlsp_major_version;
|
|
guint8 nlsp_header_length;
|
|
guint8 packet_type_flags;
|
|
guint8 packet_type;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "NLSP");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
nlsp_major_version = tvb_get_guint8(tvb, 5);
|
|
if (nlsp_major_version != 1){
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO,
|
|
"Unknown NLSP version (%u vs 1)",
|
|
nlsp_major_version);
|
|
}
|
|
nlsp_dissect_unknown(tvb, tree, 0,
|
|
"Unknown NLSP version (%d vs 1)",
|
|
nlsp_major_version, 1);
|
|
return;
|
|
}
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_nlsp, tvb, 0, -1, FALSE);
|
|
nlsp_tree = proto_item_add_subtree(ti, ett_nlsp);
|
|
}
|
|
|
|
if (tree) {
|
|
proto_tree_add_item(nlsp_tree, hf_nlsp_irpd, tvb, offset, 1,
|
|
FALSE );
|
|
}
|
|
offset += 1;
|
|
|
|
nlsp_header_length = tvb_get_guint8(tvb, 1);
|
|
if (tree) {
|
|
proto_tree_add_uint(nlsp_tree, hf_nlsp_header_length, tvb,
|
|
offset, 1, nlsp_header_length );
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_item(nlsp_tree, hf_nlsp_minor_version, tvb,
|
|
offset, 1, FALSE );
|
|
}
|
|
offset += 1;
|
|
|
|
offset += 1; /* Reserved */
|
|
|
|
packet_type_flags = tvb_get_guint8(tvb, offset);
|
|
packet_type = packet_type_flags & PACKET_TYPE_MASK;
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str(packet_type, nlsp_packet_type_vals, "Unknown (%u)"));
|
|
}
|
|
if (tree) {
|
|
if (packet_type == NLSP_TYPE_L1_LSP) {
|
|
proto_tree_add_boolean(nlsp_tree, hf_nlsp_nr, tvb, offset, 1,
|
|
packet_type_flags );
|
|
}
|
|
proto_tree_add_uint(nlsp_tree, hf_nlsp_type, tvb, offset, 1,
|
|
packet_type_flags );
|
|
}
|
|
offset += 1;
|
|
|
|
if (tree) {
|
|
proto_tree_add_item(nlsp_tree, hf_nlsp_major_version, tvb,
|
|
offset, 1, FALSE );
|
|
}
|
|
offset += 1;
|
|
|
|
offset += 2; /* Reserved */
|
|
|
|
switch (packet_type) {
|
|
|
|
case NLSP_TYPE_L1_HELLO:
|
|
case NLSP_TYPE_WAN_HELLO:
|
|
nlsp_dissect_nlsp_hello(tvb, pinfo, nlsp_tree, offset,
|
|
packet_type, nlsp_header_length);
|
|
break;
|
|
|
|
case NLSP_TYPE_L1_LSP:
|
|
nlsp_dissect_nlsp_lsp(tvb, pinfo, nlsp_tree, offset,
|
|
nlsp_header_length);
|
|
break;
|
|
|
|
case NLSP_TYPE_L1_CSNP:
|
|
nlsp_dissect_nlsp_csnp(tvb, pinfo, nlsp_tree, offset,
|
|
nlsp_header_length);
|
|
break;
|
|
|
|
case NLSP_TYPE_L1_PSNP:
|
|
nlsp_dissect_nlsp_psnp(tvb, pinfo, nlsp_tree, offset,
|
|
nlsp_header_length);
|
|
break;
|
|
|
|
default:
|
|
nlsp_dissect_unknown(tvb, tree, offset,
|
|
"Unknown NLSP packet type");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: proto_register_nlsp()
|
|
*
|
|
* Description:
|
|
* main register for NLSP protocol set. We register some display
|
|
* formats and the protocol module variables.
|
|
*
|
|
* NOTE: this procedure to autolinked by the makefile process that
|
|
* builds register.c
|
|
*
|
|
* Input:
|
|
* void
|
|
*
|
|
* Output:
|
|
* void
|
|
*/
|
|
void
|
|
proto_register_nlsp(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_nlsp_irpd,
|
|
{ "NetWare Link Services Protocol Discriminator", "nlsp.irpd",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_nlsp_header_length,
|
|
{ "PDU Header Length", "nlsp.header_length",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_nlsp_minor_version,
|
|
{ "Minor Version", "nlsp.minor_version", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_nlsp_nr,
|
|
{ "Multi-homed Non-routing Server", "nlsp.nr", FT_BOOLEAN, 8,
|
|
NULL, 0x80, "", HFILL }},
|
|
|
|
{ &hf_nlsp_type,
|
|
{ "Packet Type", "nlsp.type", FT_UINT8, BASE_DEC,
|
|
VALS(nlsp_packet_type_vals), PACKET_TYPE_MASK, "", HFILL }},
|
|
|
|
{ &hf_nlsp_major_version,
|
|
{ "Major Version", "nlsp.major_version", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_nlsp_packet_length,
|
|
{ "Packet Length", "nlsp.packet_length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_nlsp_hello_state,
|
|
{ "State", "nlsp.hello.state", FT_UINT8, BASE_DEC,
|
|
VALS(nlsp_hello_state_vals), NLSP_HELLO_STATE_MASK,
|
|
"", HFILL }},
|
|
|
|
{ &hf_nlsp_hello_multicast,
|
|
{ "Multicast Routing", "nlsp.hello.multicast", FT_BOOLEAN, 8,
|
|
TFS(&supported_string), NLSP_HELLO_MULTICAST_MASK,
|
|
"If set, this router supports multicast routing", HFILL }},
|
|
|
|
{ &hf_nlsp_hello_circuit_type,
|
|
{ "Circuit Type", "nlsp.hello.circuit_type", FT_UINT8, BASE_DEC,
|
|
VALS(nlsp_hello_circuit_type_vals), NLSP_HELLO_CTYPE_MASK,
|
|
"", HFILL }},
|
|
|
|
{ &hf_nlsp_hello_holding_timer,
|
|
{ "Holding Timer", "nlsp.hello.holding_timer", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_nlsp_hello_priority,
|
|
{ "Priority", "nlsp.hello.priority", FT_UINT8, BASE_DEC,
|
|
NULL, NLSP_HELLO_PRIORITY_MASK,
|
|
"", HFILL }},
|
|
|
|
{ &hf_nlsp_lsp_sequence_number,
|
|
{ "Sequence Number", "nlsp.sequence_number",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_nlsp_lsp_checksum,
|
|
{ "Checksum", "nlsp.lsp.checksum",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_nlsp_lsp_p,
|
|
{ "Partition Repair", "nlsp.lsp.partition_repair", FT_BOOLEAN, 8,
|
|
TFS(&supported_string), NLSP_LSP_PARTITION_MASK,
|
|
"If set, this router supports the optional Partition Repair function", HFILL }},
|
|
|
|
{ &hf_nlsp_lsp_attached_flag,
|
|
{ "Attached Flag", "nlsp.lsp.attached_flag", FT_UINT8, BASE_DEC,
|
|
VALS(nlsp_attached_flag_vals), NLSP_LSP_ATT_MASK, "", HFILL }},
|
|
|
|
{ &hf_nlsp_lsp_lspdbol,
|
|
{ "LSP Database Overloaded", "nlsp.lsp.lspdbol", FT_BOOLEAN, 8,
|
|
NULL, NLSP_LSP_OVERFLOW_MASK, "", HFILL }},
|
|
|
|
{ &hf_nlsp_lsp_router_type,
|
|
{ "Router Type", "nlsp.lsp.router_type", FT_UINT8, BASE_DEC,
|
|
VALS(nlsp_router_type_vals), NLSP_LSP_ROUTER_TYPE_MASK,
|
|
"", HFILL }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_nlsp,
|
|
&ett_nlsp_hello_clv_area_addr,
|
|
&ett_nlsp_hello_clv_neighbors,
|
|
&ett_nlsp_hello_local_mtu,
|
|
&ett_nlsp_hello_clv_unknown,
|
|
&ett_nlsp_lsp_info,
|
|
&ett_nlsp_lsp_clv_area_addr,
|
|
&ett_nlsp_lsp_clv_mgt_info,
|
|
&ett_nlsp_lsp_clv_link_info,
|
|
&ett_nlsp_lsp_clv_svcs_info,
|
|
&ett_nlsp_lsp_clv_ext_routes,
|
|
&ett_nlsp_lsp_clv_unknown,
|
|
&ett_nlsp_csnp_lsp_entries,
|
|
&ett_nlsp_csnp_lsp_entry,
|
|
&ett_nlsp_csnp_clv_unknown,
|
|
&ett_nlsp_psnp_lsp_entries,
|
|
&ett_nlsp_psnp_lsp_entry,
|
|
&ett_nlsp_psnp_clv_unknown,
|
|
};
|
|
|
|
proto_nlsp = proto_register_protocol("NetWare Link Services Protocol",
|
|
"NLSP", "nlsp");
|
|
proto_register_field_array(proto_nlsp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_nlsp(void)
|
|
{
|
|
dissector_handle_t nlsp_handle;
|
|
|
|
nlsp_handle = create_dissector_handle(dissect_nlsp, proto_nlsp);
|
|
dissector_add("ipx.socket", IPX_SOCKET_NLSP, nlsp_handle);
|
|
}
|