d8a2cf3c4d
Enhance RIPng * Replace tvb_memcpy/proto_tree_add_text by proto_tree_add_item * Remove dependency to packet-ipv6.h * Remove packet-ripng.h (not needed) Also update AUTHORS file From me: Put a check_col() back and reword (shorten) a couple of the new blurbs. svn path=/trunk/; revision=36033
178 lines
5.5 KiB
C
178 lines
5.5 KiB
C
/* packet-ripng.c
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* Routines for RIPng disassembly
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* (c) Copyright Jun-ichiro itojun Hagino <itojun@itojun.org>
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* derived from packet-rip.c
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Enhance RIPng by Alexis La Goutte
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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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* References:
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* RFC2080: RIPng for IPv6
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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static int proto_ripng = -1;
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static int hf_ripng_cmd = -1;
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static int hf_ripng_version = -1;
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static int hf_ripng_reserved = -1;
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static int hf_ripng_rte = -1;
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static int hf_ripng_rte_ipv6_prefix = -1;
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static int hf_ripng_rte_route_tag = -1;
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static int hf_ripng_rte_prefix_length = -1;
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static int hf_ripng_rte_metric = -1;
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static gint ett_ripng = -1;
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static gint ett_ripng_rte = -1;
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#define UDP_PORT_RIPNG 521
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#define RIP6_REQUEST 1
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#define RIP6_RESPONSE 2
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static const value_string cmdvals[] = {
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{ RIP6_REQUEST, "Request" },
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{ RIP6_RESPONSE, "Response" },
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{ 0, NULL },
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};
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static void
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dissect_ripng(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
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int offset = 0;
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proto_tree *ripng_tree = NULL, *rte_tree = NULL;
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proto_item *ti, *rte_ti;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "RIPng");
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_clear(pinfo->cinfo, COL_INFO);
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col_add_fstr(pinfo->cinfo, COL_INFO," Command %s, Version %u",
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val_to_str(tvb_get_guint8(tvb, offset), cmdvals, "Unknown (%u)"),
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tvb_get_guint8(tvb, offset +1));
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_ripng, tvb, offset, -1, FALSE);
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ripng_tree = proto_item_add_subtree(ti, ett_ripng);
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/* Command */
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proto_tree_add_item(ripng_tree, hf_ripng_cmd, tvb, offset, 1, FALSE);
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offset += 1;
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/* Version */
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proto_tree_add_item(ripng_tree, hf_ripng_version, tvb, offset, 1, FALSE);
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offset += 1;
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/* Reserved */
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proto_tree_add_item(ripng_tree, hf_ripng_reserved, tvb, offset, 2, FALSE);
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offset += 2;
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/* Route Table Entry */
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while (tvb_reported_length_remaining(tvb, offset) > 0) {
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rte_ti = proto_tree_add_item(ripng_tree, hf_ripng_rte, tvb, offset, 16 + 2 + 1 + 1, FALSE);
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rte_tree = proto_item_add_subtree(rte_ti, ett_ripng_rte);
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/* IPv6 Prefix */
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proto_tree_add_item(rte_tree, hf_ripng_rte_ipv6_prefix, tvb, offset, 16, FALSE);
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proto_item_append_text(rte_ti, ": IPv6 Prefix: %s", tvb_ip6_to_str(tvb, offset));
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offset += 16;
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/* Route Tag */
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proto_tree_add_item(rte_tree, hf_ripng_rte_route_tag, tvb, offset, 2, FALSE);
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offset += 2;
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/* Prefix Length */
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proto_tree_add_item(rte_tree, hf_ripng_rte_prefix_length, tvb, offset, 1, FALSE);
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proto_item_append_text(rte_ti, "/%u", tvb_get_guint8(tvb, offset));
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offset += 1;
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/* Metric */
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proto_tree_add_item(rte_tree, hf_ripng_rte_metric, tvb, offset, 1, FALSE);
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proto_item_append_text(rte_ti, " Metric: %u", tvb_get_guint8(tvb, offset));
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offset += 1;
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}
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}
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}
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void
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proto_register_ripng(void)
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{
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static hf_register_info hf[] = {
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{ &hf_ripng_cmd,
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{ "Command", "ripng.cmd",
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FT_UINT8, BASE_DEC, VALS(cmdvals), 0x0,
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"Used to specify the purpose of this message", HFILL }},
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{ &hf_ripng_version,
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{ "Version", "ripng.version",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"Version of RIPng", HFILL }},
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{ &hf_ripng_reserved,
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{ "Reserved", "ripng.reserved",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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"Must be Zero", HFILL }},
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{ &hf_ripng_rte,
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{ "Route Table Entry", "ripng.rte",
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FT_NONE, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_ripng_rte_ipv6_prefix,
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{ "IPv6 Prefix", "ripng.rte.ipv6_prefix",
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FT_IPv6, BASE_NONE, NULL, 0x0,
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"Destination", HFILL }},
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{ &hf_ripng_rte_route_tag,
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{ "Route Tag", "ripng.rte.route_tag",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"Provides a method of separating internal RIPng routes (routes for networks within the RIPng routing domain) from external RIPng routes, which may have been imported from an EGP or another IGP", HFILL }},
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{ &hf_ripng_rte_prefix_length,
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{ "Prefix Length", "ripng.rte.prefix_length",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"The length in bits of the significant part of the prefix starting from the left of the prefix", HFILL }},
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{ &hf_ripng_rte_metric,
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{ "Metric", "ripng.rte.metric",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"The current metric for the destination; the value 16 (infinity) indicates that the destination is not reachable", HFILL }},
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};
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static gint *ett[] = {
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&ett_ripng,
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&ett_ripng_rte,
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};
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proto_ripng = proto_register_protocol("RIPng", "RIPng", "ripng");
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proto_register_field_array(proto_ripng, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_ripng(void)
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{
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dissector_handle_t ripng_handle;
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ripng_handle = create_dissector_handle(dissect_ripng, proto_ripng);
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dissector_add_uint("udp.port", UDP_PORT_RIPNG, ripng_handle);
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}
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