forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
Similar to the "tcp.port" changes in I99604f95d426ad345f4b494598d94178b886eb67, convert dissectors that use "udp.port". More cleanup done on dissectors that use both TCP and UDP dissector tables, so that less preference callbacks exist. Change-Id: If07be9b9e850c244336a7069599cd554ce312dd3 Reviewed-on: https://code.wireshark.org/review/18120 Petri-Dish: Michael Mann <mmann78@netscape.net> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Michael Mann <mmann78@netscape.net>
190 lines
6.5 KiB
C
190 lines
6.5 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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* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 <epan/packet.h>
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#include <epan/to_str.h>
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void proto_register_ripng(void);
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void proto_reg_handoff_ripng(void);
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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 int
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dissect_ripng(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) {
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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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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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if (tree) {
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ti = proto_tree_add_item(tree, proto_ripng, tvb, offset, -1, ENC_NA);
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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, ENC_BIG_ENDIAN);
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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, ENC_BIG_ENDIAN);
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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, ENC_NA);
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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, ENC_NA);
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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, ENC_NA);
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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, ENC_BIG_ENDIAN);
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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, ENC_BIG_ENDIAN);
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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, ENC_BIG_ENDIAN);
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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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return tvb_captured_length(tvb);
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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_with_preference("udp.port", UDP_PORT_RIPNG, ripng_handle);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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