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Diffstat (limited to 'epan/dissectors/packet-ripng.c')
| -rw-r--r-- | epan/dissectors/packet-ripng.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/epan/dissectors/packet-ripng.c b/epan/dissectors/packet-ripng.c new file mode 100644 index 0000000000..7ed7526e92 --- /dev/null +++ b/epan/dissectors/packet-ripng.c @@ -0,0 +1,155 @@ +/* packet-ripng.c + * Routines for RIPng disassembly + * (c) Copyright Jun-ichiro itojun Hagino <itojun@itojun.org> + * derived from packet-rip.c + * + * $Id$ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include "config.h" + +#include <string.h> +#include <glib.h> +#include <epan/packet.h> +#include "packet-ripng.h" + +#ifndef offsetof +#define offsetof(type, member) ((size_t)(&((type *)0)->member)) +#endif + +static int proto_ripng = -1; +static int hf_ripng_cmd = -1; +static int hf_ripng_version = -1; + +static gint ett_ripng = -1; +static gint ett_ripng_addr = -1; + +#define UDP_PORT_RIPNG 521 + +static const value_string cmdvals[] = { + { RIP6_REQUEST, "Request" }, + { RIP6_RESPONSE, "Response" }, + { 0, NULL }, +}; + +static void +dissect_ripng(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { + int offset = 0; + struct rip6 rip6; + struct netinfo6 ni6; + proto_tree *ripng_tree = NULL; + proto_tree *subtree = NULL; + proto_item *ti; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "RIPng"); + if (check_col(pinfo->cinfo, COL_INFO)) + col_clear(pinfo->cinfo, COL_INFO); + + /* avoid alignment problem */ + tvb_memcpy(tvb, (guint8 *)&rip6, offset, sizeof(rip6)); + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_add_fstr(pinfo->cinfo, COL_PROTOCOL, "RIPng version %u", rip6.rip6_vers); + if (check_col(pinfo->cinfo, COL_INFO)) + col_add_str(pinfo->cinfo, COL_INFO, + val_to_str(rip6.rip6_cmd, cmdvals, "Unknown command (%u)")); + + if (tree) { + ti = proto_tree_add_item(tree, proto_ripng, tvb, offset, -1, FALSE); + ripng_tree = proto_item_add_subtree(ti, ett_ripng); + + proto_tree_add_uint(ripng_tree, hf_ripng_cmd, tvb, offset, 1, + rip6.rip6_cmd); + proto_tree_add_uint(ripng_tree, hf_ripng_version, tvb, offset + 1, 1, + rip6.rip6_vers); + + offset += 4; + while (tvb_reported_length_remaining(tvb, offset) > 0) { + tvb_memcpy(tvb, (guint8 *)&ni6, offset, sizeof(ni6)); + if (ni6.rip6_tag) { + ti = proto_tree_add_text(ripng_tree, tvb, offset, + sizeof(ni6), "IP Address: %s/%u, Metric: %u, tag: 0x%04x", + ip6_to_str(&ni6.rip6_dest), + ni6.rip6_plen, + ni6.rip6_metric, + g_ntohs(ni6.rip6_tag)); + } else { + ti = proto_tree_add_text(ripng_tree, tvb, offset, + sizeof(ni6), "IP Address: %s/%u, Metric: %u", + ip6_to_str(&ni6.rip6_dest), + ni6.rip6_plen, + ni6.rip6_metric); + } + subtree = proto_item_add_subtree(ti, ett_ripng_addr); + proto_tree_add_text(subtree, tvb, + offset + offsetof(struct netinfo6, rip6_dest), + sizeof(ni6.rip6_dest), "IP Address: %s", + ip6_to_str(&ni6.rip6_dest)); + proto_tree_add_text(subtree, tvb, + offset + offsetof(struct netinfo6, rip6_tag), + sizeof(ni6.rip6_tag), "Tag: 0x%04x", + g_ntohs(ni6.rip6_tag)); + proto_tree_add_text(subtree, tvb, + offset + offsetof(struct netinfo6, rip6_plen), + sizeof(ni6.rip6_plen), "Prefix length: %u", + ni6.rip6_plen); + proto_tree_add_text(subtree, tvb, + offset + offsetof(struct netinfo6, rip6_metric), + sizeof(ni6.rip6_metric), "Metric: %u", + ni6.rip6_metric); + + offset += sizeof(ni6); + } + } +} + +void +proto_register_ripng(void) +{ + static hf_register_info hf[] = { + { &hf_ripng_cmd, + { "Command", "ripng.cmd", + FT_UINT8, BASE_DEC, VALS(cmdvals), + 0x0, "", HFILL }}, + { &hf_ripng_version, + { "Version", "ripng.version", + FT_UINT8, BASE_DEC, NULL, + 0x0, "", HFILL }}, + }; + static gint *ett[] = { + &ett_ripng, + &ett_ripng_addr, + }; + + proto_ripng = proto_register_protocol("RIPng", "RIPng", "ripng"); + proto_register_field_array(proto_ripng, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); +} + +void +proto_reg_handoff_ripng(void) +{ + dissector_handle_t ripng_handle; + + ripng_handle = create_dissector_handle(dissect_ripng, proto_ripng); + dissector_add("udp.port", UDP_PORT_RIPNG, ripng_handle); +} |