diff options
author | guy <guy@f5534014-38df-0310-8fa8-9805f1628bb7> | 2000-02-05 05:54:17 +0000 |
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committer | guy <guy@f5534014-38df-0310-8fa8-9805f1628bb7> | 2000-02-05 05:54:17 +0000 |
commit | 440ef004079fdbe25a7b374d505616250f1912c9 (patch) | |
tree | 53797a29245feb1f20c4623c08375970e8cd403e /packet-cgmp.c | |
parent | 8666d440417bcef3a85fee30ac1d9cde36e5b245 (diff) |
Cisco Group Management Protocol dissector.
git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@1601 f5534014-38df-0310-8fa8-9805f1628bb7
Diffstat (limited to 'packet-cgmp.c')
-rw-r--r-- | packet-cgmp.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/packet-cgmp.c b/packet-cgmp.c new file mode 100644 index 0000000000..f07a6908fd --- /dev/null +++ b/packet-cgmp.c @@ -0,0 +1,139 @@ +/* packet-cgmp.c + * Routines for the disassembly of the Cisco Group Management Protocol + * + * $Id: packet-cgmp.c,v 1.1 2000/02/05 05:54:15 guy Exp $ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@zing.org> + * 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" + +#ifdef HAVE_SYS_TYPES_H +#include <sys/types.h> +#endif + +#include <stdlib.h> +#include <string.h> + +#include <glib.h> +#include "packet.h" + +/* + * See + * + * http://www.barnett.sk/software/bbooks/cisco_multicasting_routing/chap04.html + * + * for some information on CGMP. + */ + +static int proto_cgmp = -1; +static int hf_cgmp_version = -1; +static int hf_cgmp_type = -1; +static int hf_cgmp_count = -1; +static int hf_cgmp_gda = -1; +static int hf_cgmp_usa = -1; + +static gint ett_cgmp = -1; + +static const value_string type_vals[] = { + { 0, "Join" }, + { 1, "Leave" }, + { 0, NULL }, +}; + +void +dissect_cgmp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) +{ + proto_item *ti; + proto_tree *cgmp_tree = NULL; + guint8 count; + + if (check_col(fd, COL_PROTOCOL)) + col_add_str(fd, COL_PROTOCOL, "CGMP"); + if (check_col(fd, COL_INFO)) + col_add_str(fd, COL_INFO, "Cisco Group Management Protocol"); + + if (tree) { + ti = proto_tree_add_item(tree, proto_cgmp, offset, END_OF_FRAME, NULL); + cgmp_tree = proto_item_add_subtree(ti, ett_cgmp); + + proto_tree_add_item(cgmp_tree, hf_cgmp_version, offset, 1, + pd[offset]); + proto_tree_add_item(cgmp_tree, hf_cgmp_type, offset, 1, + pd[offset]); + offset += 1; + + offset += 2; /* skip reserved field */ + + count = pd[offset]; + proto_tree_add_item(cgmp_tree, hf_cgmp_count, offset, 1, + count); + offset += 1; + + while (count != 0) { + if (!BYTES_ARE_IN_FRAME(offset, 6)) + break; + proto_tree_add_item(cgmp_tree, hf_cgmp_gda, offset, 6, + &pd[offset]); + offset += 6; + + if (!BYTES_ARE_IN_FRAME(offset, 6)) + break; + proto_tree_add_item(cgmp_tree, hf_cgmp_usa, offset, 6, + &pd[offset]); + offset += 6; + + count--; + } + } +} + +void +proto_register_cgmp(void) +{ + static hf_register_info hf[] = { + { &hf_cgmp_version, + { "Version", "cgmp.version", FT_UINT8, BASE_DEC, NULL, 0xF0, + "" }}, + + { &hf_cgmp_type, + { "Type", "cgmp.type", FT_UINT8, BASE_DEC, VALS(type_vals), 0x0F, + "" }}, + + { &hf_cgmp_count, + { "Count", "cgmp.count", FT_UINT8, BASE_DEC, NULL, 0x0, + "" }}, + + { &hf_cgmp_gda, + { "Group Destination Address", "cgmp.gda", FT_ETHER, BASE_NONE, NULL, 0x0, + "Group Destination Address" }}, + + { &hf_cgmp_usa, + { "Unicast Source Address", "cgmp.usa", FT_ETHER, BASE_NONE, NULL, 0x0, + "Unicast Source Address" }}, + }; + static gint *ett[] = { + &ett_cgmp, + }; + + proto_cgmp = proto_register_protocol("Cisco Group Management Protocol", "cgmp"); + proto_register_field_array(proto_cgmp, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); +} |