263 lines
7 KiB
C
263 lines
7 KiB
C
/* packet-rmcp.c
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* Routines for RMCP packet dissection
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*
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* Duncan Laurie <duncan@sun.com>
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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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* Copied from packet-tftp.c
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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
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* 02111-1307, USA.
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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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/*
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* See
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* http://www.dmtf.org/standards/standard_alert.php
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* http://www.dmtf.org/standards/documents/ASF/DSP0136.pdf
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* (the ASF specification includes RMCP)
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*/
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static int proto_rmcp = -1;
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static int hf_rmcp_version = -1;
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static int hf_rmcp_sequence = -1;
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static int hf_rmcp_class = -1;
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static int hf_rmcp_type = -1;
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static int proto_rsp = -1;
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static int hf_rsp_session_id = -1;
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static int hf_rsp_sequence = -1;
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static gint ett_rmcp = -1;
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static gint ett_rmcp_typeclass = -1;
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static gint ett_rsp = -1;
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static dissector_handle_t data_handle;
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static dissector_table_t rmcp_dissector_table;
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#define UDP_PORT_RMCP 623
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#define UDP_PORT_RMCP_SECURE 664
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#define RMCP_TYPE_MASK 0x80
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#define RMCP_TYPE_NORM 0x00
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#define RMCP_TYPE_ACK 0x01
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static const value_string rmcp_type_vals[] = {
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{ RMCP_TYPE_NORM, "Normal RMCP" },
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{ RMCP_TYPE_ACK, "RMCP ACK" },
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{ 0, NULL }
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};
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#define RMCP_CLASS_MASK 0x1f
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#define RMCP_CLASS_ASF 0x06
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#define RMCP_CLASS_IPMI 0x07
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#define RMCP_CLASS_OEM 0x08
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static const value_string rmcp_class_vals[] = {
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{ RMCP_CLASS_ASF, "ASF" },
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{ RMCP_CLASS_IPMI, "IPMI" },
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{ RMCP_CLASS_OEM, "OEM" },
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{ 0, NULL }
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};
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static int
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dissect_rmcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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proto_tree *rmcp_tree = NULL, *field_tree;
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proto_item *ti, *tf;
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tvbuff_t *next_tvb;
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guint8 class;
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const gchar *class_str;
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guint8 type;
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guint len;
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/*
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* Check whether it's a known class value; if not, assume it's
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* not RMCP.
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*/
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if (!tvb_bytes_exist(tvb, 3, 1))
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return 0; /* class value byte not present */
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class = tvb_get_guint8(tvb, 3);
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/* Get the normal/ack bit from the RMCP class */
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type = (class & RMCP_TYPE_MASK) >> 7;
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class &= RMCP_CLASS_MASK;
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class_str = match_strval(class, rmcp_class_vals);
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if (class_str == NULL)
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return 0; /* unknown class value */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "RMCP");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s, Class: %s",
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val_to_str(type, rmcp_type_vals, "Unknown (0x%02x)"),
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class_str);
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if (tree) {
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ti = proto_tree_add_protocol_format(tree, proto_rmcp, tvb, 0, 4,
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"Remote Management Control Protocol, Class: %s",
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class_str);
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rmcp_tree = proto_item_add_subtree(ti, ett_rmcp);
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proto_tree_add_item(rmcp_tree, hf_rmcp_version, tvb, 0, 1, ENC_LITTLE_ENDIAN);
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proto_tree_add_item(rmcp_tree, hf_rmcp_sequence, tvb, 2, 1, ENC_LITTLE_ENDIAN);
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tf = proto_tree_add_text(rmcp_tree, tvb, 3, 1, "Type: %s, Class: %s",
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val_to_str(type, rmcp_type_vals, "Unknown (0x%02x)"),
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class_str);
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field_tree = proto_item_add_subtree(tf, ett_rmcp_typeclass);
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proto_tree_add_item(field_tree, hf_rmcp_class, tvb, 3, 1, ENC_LITTLE_ENDIAN);
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proto_tree_add_item(field_tree, hf_rmcp_type, tvb, 3, 1, ENC_LITTLE_ENDIAN);
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}
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if (!type){ /* do not expect a data block for an ACK */
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next_tvb = tvb_new_subset_remaining(tvb, 4);
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if (!dissector_try_uint(rmcp_dissector_table, class, next_tvb, pinfo,
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tree)) {
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len = call_dissector(data_handle, next_tvb, pinfo, tree);
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if (len < tvb_length(next_tvb)) {
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proto_tree_add_text(tree, tvb, 4 + len, -1,
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"RSP Trailer (%d bytes):", tvb_length(next_tvb) - len);
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}
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}
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}
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return tvb_length(tvb);
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}
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static int
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dissect_rsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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proto_tree *rsp_tree = NULL/*, *field_tree*/;
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proto_item *ti/*, *tf*/;
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tvbuff_t *next_tvb;
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int offset = 0;
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if (tree) {
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ti = proto_tree_add_protocol_format(tree, proto_rsp, tvb, offset, 8,
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"RMCP Security-extension Protocol");
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rsp_tree = proto_item_add_subtree(ti, ett_rsp);
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proto_tree_add_item(rsp_tree, hf_rsp_session_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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proto_tree_add_item(rsp_tree, hf_rsp_sequence, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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}
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/* XXX determination of RCMP message length needs to
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* be done according to 3.2.3.3.3 of the specification.
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* This is only valid for session ID equals 0
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*/
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next_tvb = tvb_new_subset_remaining(tvb, 8);
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dissect_rmcp(next_tvb, pinfo, tree, NULL);
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return tvb_length(tvb);
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}
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void
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proto_register_rmcp(void)
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{
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static hf_register_info hf[] = {
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{ &hf_rmcp_version, {
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"Version", "rmcp.version",
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FT_UINT8, BASE_HEX, NULL, 0,
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"RMCP Version", HFILL }},
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{ &hf_rmcp_sequence, {
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"Sequence", "rmcp.sequence",
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FT_UINT8, BASE_HEX, NULL, 0,
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"RMCP Sequence", HFILL }},
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{ &hf_rmcp_class, {
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"Class", "rmcp.class",
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FT_UINT8, BASE_HEX,
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VALS(rmcp_class_vals), RMCP_CLASS_MASK,
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"RMCP Class", HFILL }},
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{ &hf_rmcp_type, {
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"Message Type", "rmcp.type",
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FT_UINT8, BASE_HEX,
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VALS(rmcp_type_vals), RMCP_TYPE_MASK,
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"RMCP Message Type", HFILL }}
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};
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static gint *ett[] = {
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&ett_rmcp,
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&ett_rmcp_typeclass
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};
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proto_rmcp = proto_register_protocol(
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"Remote Management Control Protocol", "RMCP", "rmcp");
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proto_register_field_array(proto_rmcp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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rmcp_dissector_table = register_dissector_table(
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"rmcp.class", "RMCP Class", FT_UINT8, BASE_HEX);
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}
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void
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proto_register_rsp(void)
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{
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static hf_register_info hf[] = {
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{ &hf_rsp_session_id, {
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"Session ID", "rsp.session_id",
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FT_UINT32, BASE_HEX, NULL, 0,
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"RSP session ID", HFILL }},
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{ &hf_rsp_sequence, {
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"Sequence", "rsp.sequence",
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FT_UINT32, BASE_HEX, NULL, 0,
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"RSP sequence", HFILL }},
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};
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static gint *ett[] = {
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&ett_rsp
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};
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proto_rsp = proto_register_protocol(
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"RMCP Security-extensions Protocol", "RSP", "rsp");
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proto_register_field_array(proto_rsp, 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_rmcp(void)
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{
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dissector_handle_t rmcp_handle;
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data_handle = find_dissector("data");
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rmcp_handle = new_create_dissector_handle(dissect_rmcp, proto_rmcp);
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dissector_add_uint("udp.port", UDP_PORT_RMCP, rmcp_handle);
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}
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void
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proto_reg_handoff_rsp(void)
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{
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dissector_handle_t rsp_handle;
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rsp_handle = new_create_dissector_handle(dissect_rsp, proto_rsp);
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dissector_add_uint("udp.port", UDP_PORT_RMCP_SECURE, rsp_handle);
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}
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