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Diffstat (limited to 'epan/dissectors/packet-rmcp.c')
| -rw-r--r-- | epan/dissectors/packet-rmcp.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/epan/dissectors/packet-rmcp.c b/epan/dissectors/packet-rmcp.c new file mode 100644 index 0000000000..eb03f595b8 --- /dev/null +++ b/epan/dissectors/packet-rmcp.c @@ -0,0 +1,191 @@ +/* packet-rmcp.c + * Routines for RMCP packet dissection + * + * Duncan Laurie <duncan@sun.com> + * + * $Id$ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 1998 Gerald Combs + * + * Copied from packet-tftp.c + * + * 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. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <glib.h> +#include <epan/packet.h> + +/* + * See + * + * http://www.dmtf.org/standards/standard_alert.php + * + * (the ASF specification includes RMCP) + */ + +static int proto_rmcp = -1; +static int hf_rmcp_version = -1; +static int hf_rmcp_sequence = -1; +static int hf_rmcp_class = -1; +static int hf_rmcp_type = -1; + +static gint ett_rmcp = -1; +static gint ett_rmcp_typeclass = -1; + +static dissector_handle_t data_handle; +static dissector_table_t rmcp_dissector_table; + +#define UDP_PORT_RMCP 623 +#define UDP_PORT_RMCP_SECURE 664 + +#define RMCP_TYPE_MASK 0x80 +#define RMCP_TYPE_NORM 0x00 +#define RMCP_TYPE_ACK 0x01 + +static const value_string rmcp_type_vals[] = { + { RMCP_TYPE_NORM, "Normal RMCP" }, + { RMCP_TYPE_ACK, "RMCP ACK" }, + { 0, NULL } +}; + +#define RMCP_CLASS_MASK 0x1f +#define RMCP_CLASS_ASF 0x06 +#define RMCP_CLASS_IPMI 0x07 +#define RMCP_CLASS_OEM 0x08 + +static const value_string rmcp_class_vals[] = { + { RMCP_CLASS_ASF, "ASF" }, + { RMCP_CLASS_IPMI, "IPMI" }, + { RMCP_CLASS_OEM, "OEM" }, + { 0, NULL } +}; + +static int +dissect_rmcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_tree *rmcp_tree = NULL, *field_tree; + proto_item *ti, *tf; + tvbuff_t *next_tvb; + guint8 class; + gchar *class_str; + guint8 type; + + /* + * Check whether it's a known class value; if not, assume it's + * not RMCP. + */ + if (!tvb_bytes_exist(tvb, 3, 1)) + return 0; /* class value byte not present */ + class = tvb_get_guint8(tvb, 3); + + /* Get the normal/ack bit from the RMCP class */ + type = (class & RMCP_TYPE_MASK) >> 7; + class &= RMCP_CLASS_MASK; + + class_str = match_strval(class, rmcp_class_vals); + if (class_str == NULL) + return 0; /* unknown class value */ + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "RMCP"); + if (check_col(pinfo->cinfo, COL_INFO)) + col_add_fstr(pinfo->cinfo, COL_INFO, "%s, Class: %s", + val_to_str(type, rmcp_type_vals, "Unknown (0x%02x)"), + class_str); + + if (tree) { + ti = proto_tree_add_protocol_format(tree, proto_rmcp, tvb, 0, 4, + "Remote Management Control Protocol, Class: %s", + class_str); + rmcp_tree = proto_item_add_subtree(ti, ett_rmcp); + + proto_tree_add_item(rmcp_tree, hf_rmcp_version, tvb, 0, 1, TRUE); + proto_tree_add_item(rmcp_tree, hf_rmcp_sequence, tvb, 2, 1, TRUE); + + tf = proto_tree_add_text(rmcp_tree, tvb, 3, 1, "Type: %s, Class: %s", + val_to_str(type, rmcp_type_vals, "Unknown (0x%02x)"), + class_str); + + field_tree = proto_item_add_subtree(tf, ett_rmcp_typeclass); + + proto_tree_add_item(field_tree, hf_rmcp_class, tvb, 3, 1, TRUE); + proto_tree_add_item(field_tree, hf_rmcp_type, tvb, 3, 1, TRUE); + } + + next_tvb = tvb_new_subset(tvb, 4, -1, -1); + + if (!dissector_try_port(rmcp_dissector_table, class, next_tvb, pinfo, + tree)) + call_dissector(data_handle, next_tvb, pinfo, tree); + + return tvb_length(tvb); +} + +void +proto_register_rmcp(void) +{ + static hf_register_info hf[] = { + { &hf_rmcp_version, { + "Version", "rmcp.version", + FT_UINT8, BASE_HEX, NULL, 0, + "RMCP Version", HFILL }}, + { &hf_rmcp_sequence, { + "Sequence", "rmcp.sequence", + FT_UINT8, BASE_HEX, NULL, 0, + "RMCP Sequence", HFILL }}, + { &hf_rmcp_class, { + "Class", "rmcp.class", + FT_UINT8, BASE_HEX, + VALS(rmcp_class_vals), RMCP_CLASS_MASK, + "RMCP Class", HFILL }}, + { &hf_rmcp_type, { + "Message Type", "rmcp.type", + FT_UINT8, BASE_HEX, + VALS(rmcp_type_vals), RMCP_TYPE_MASK, + "RMCP Message Type", HFILL }}, + }; + static gint *ett[] = { + &ett_rmcp, + &ett_rmcp_typeclass, + }; + + proto_rmcp = proto_register_protocol( + "Remote Management Control Protocol", "RMCP", "rmcp"); + + proto_register_field_array(proto_rmcp, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + rmcp_dissector_table = register_dissector_table( + "rmcp.class", "RMCP Class", FT_UINT8, BASE_HEX); +} + +void +proto_reg_handoff_rmcp(void) +{ + dissector_handle_t rmcp_handle; + + data_handle = find_dissector("data"); + + rmcp_handle = new_create_dissector_handle(dissect_rmcp, proto_rmcp); + dissector_add("udp.port", UDP_PORT_RMCP, rmcp_handle); + dissector_add("udp.port", UDP_PORT_RMCP_SECURE, rmcp_handle); +} |