/wireshark-1.8.0/epan/dissectors/packet-asf.c
C | 389 lines | 317 code | 38 blank | 34 comment | 7 complexity | 2dcbf7223ba0f3c2714953f8d3597502 MD5 | raw file
Possible License(s): GPL-2.0, BSD-3-Clause
- /* packet-asf.c
- * Routines for ASF packet dissection
- *
- * Duncan Laurie <duncan@sun.com>
- *
- * $Id: packet-asf.c 42115 2012-04-17 22:36:50Z guy $
- *
- * Wireshark - Network traffic analyzer
- * By Gerald Combs <gerald@wireshark.org>
- * Copyright 1998 Gerald Combs
- *
- * Copied from packet-rmcp.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>
- #include <epan/expert.h>
- #include <epan/sminmpec.h>
- /*
- * See
- * http://www.dmtf.org/standards/standard_alert.php
- * http://www.dmtf.org/standards/documents/ASF/DSP0136.pdf
- */
- #define RMCP_CLASS_ASF 0x06
- static int proto_asf = -1;
- static int hf_asf_iana = -1;
- static int hf_asf_type = -1;
- static int hf_asf_tag = -1;
- static int hf_asf_len = -1;
- static int hf_asf_rssp_status_code = -1;
- static int hf_asf_mgt_console_id = -1;
- static int hf_asf_client_id = -1;
- static int hf_asf_payload = -1;
- static int hf_asf_payload_type = -1;
- static int hf_asf_payload_len = -1;
- static int hf_asf_payload_data = -1;
- static int hf_asf_auth_alg = -1;
- static int hf_asf_integrity_alg = -1;
- static int hf_asf_reserved = -1;
- static dissector_handle_t data_handle;
- static gint ett_asf = -1;
- static gint ett_asf_payload = -1;
- static gint ett_asf_alg_payload = -1;
- #define ASF_TYPE_RESET 0x10
- #define ASF_TYPE_PWR_UP 0x11
- #define ASF_TYPE_PWR_DOWN 0x12
- #define ASF_TYPE_PWR_CYCLE 0x13
- #define ASF_TYPE_PRES_PONG 0x40
- #define ASF_TYPE_CAP_RESP 0x41
- #define ASF_TYPE_SYS_STATE_RESP 0x42
- #define ASF_TYPE_OPEN_SESS_RESP 0x43
- #define ASF_TYPE_CLOSE_SESS_RESP 0x44
- #define ASF_TYPE_PRES_PING 0x80
- #define ASF_TYPE_CAP_RQST 0x81
- #define ASF_TYPE_SYS_STATE_RQST 0x82
- #define ASF_TYPE_OPEN_SESS_RQST 0x83
- #define ASF_TYPE_CLOSE_SESS_RQST 0x84
- #define ASF_TYPE_RAKP_MSG_1 0xC0
- #define ASF_TYPE_RAKP_MSG_2 0xC1
- #define ASF_TYPE_RAKP_MSG_3 0xC2
- static const value_string asf_type_vals[] = {
- { ASF_TYPE_RESET, "Reset" },
- { ASF_TYPE_PWR_UP, "Power-up" },
- { ASF_TYPE_PWR_DOWN, "Unconditional Power-down" },
- { ASF_TYPE_PWR_CYCLE, "Power Cycle" },
- { ASF_TYPE_PRES_PONG, "Presence Pong" },
- { ASF_TYPE_CAP_RESP, "Capabilities Response" },
- { ASF_TYPE_SYS_STATE_RESP, "System State Response" },
- { ASF_TYPE_OPEN_SESS_RESP, "Open Session Response" },
- { ASF_TYPE_CLOSE_SESS_RESP, "Close Session Response" },
- { ASF_TYPE_PRES_PING, "Presence Ping" },
- { ASF_TYPE_CAP_RQST, "Capabilities Request" },
- { ASF_TYPE_SYS_STATE_RQST, "System State Request" },
- { ASF_TYPE_OPEN_SESS_RQST, "Open Session Request" },
- { ASF_TYPE_CLOSE_SESS_RQST, "Close Session Request" },
- { ASF_TYPE_RAKP_MSG_1, "RAKP Message 1" },
- { ASF_TYPE_RAKP_MSG_2, "RAKP Message 2" },
- { ASF_TYPE_RAKP_MSG_3, "RAKP Message 3" },
- { 0x00, NULL }
- };
- static const value_string asf_rssp_status_code_vals[] = {
- { 0x00, "No errors" },
- { 0x01, "Insufficient resources to create a session" },
- { 0x02, "Invalid session ID" },
- { 0x03, "Invalid payload type" },
- { 0x04, "Invalid authentication algorithm" },
- { 0x05, "Invalid integrity algorithm" },
- { 0x06, "No matching authentication payload" },
- { 0x07, "No matching integrity payload" },
- { 0x00, NULL }
- };
- #define ASF_PAYLOAD_TYPE_NONE 0x00
- #define ASF_PAYLOAD_TYPE_AUTHENTICATION 0x01
- #define ASF_PAYLOAD_TYPE_INTEGRITY 0x02
- static const value_string asf_payload_type_vals[] = {
- { ASF_PAYLOAD_TYPE_NONE, "No payload present (end of list)" },
- { ASF_PAYLOAD_TYPE_AUTHENTICATION, "Authentication algorithm payload" },
- { ASF_PAYLOAD_TYPE_INTEGRITY, "Integrity algorithm payload" },
- { 0x00, NULL }
- };
- static const value_string asf_authentication_type_vals[] = {
- { 0x01, "RAKP-HMAC-SHA1" },
- { 0x00, NULL }
- };
- static const value_string asf_integrity_type_vals[] = {
- { 0x01, "HMAC-SHA1-96" },
- { 0x00, NULL }
- };
- static void dissect_asf_open_session_request(tvbuff_t *tvb, packet_info *pinfo,
- proto_tree *tree, gint offset, gint len);
- static void dissect_asf_open_session_response(tvbuff_t *tvb, packet_info *pinfo,
- proto_tree *tree, gint offset, gint len);
- static void dissect_asf_payloads(tvbuff_t *tvb, packet_info *pinfo,
- proto_tree *tree, gint offset, gint len);
- static void dissect_asf_payload_authentication(tvbuff_t *tvb, proto_tree *tree,
- gint offset, gint len);
- static void dissect_asf_payload_integrity(tvbuff_t *tvb, proto_tree *tree,
- gint offset, gint len);
- static int
- dissect_asf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
- {
- proto_tree *asf_tree = NULL;
- proto_item *ti;
- guint8 type;
- guint8 len;
- tvbuff_t *next_tvb;
- col_set_str(pinfo->cinfo, COL_PROTOCOL, "ASF");
- col_clear(pinfo->cinfo, COL_INFO);
- type = tvb_get_guint8(tvb, 4);
- len = tvb_get_guint8(tvb, 7);
- col_add_str(pinfo->cinfo, COL_INFO,
- val_to_str(type, asf_type_vals, "Unknown (0x%02x)"));
- if (tree) {
- ti = proto_tree_add_item(tree, proto_asf, tvb, 0, 8,ENC_NA);
- asf_tree = proto_item_add_subtree(ti, ett_asf);
- proto_tree_add_item(asf_tree, hf_asf_iana, tvb, 0, 4,ENC_BIG_ENDIAN);
- proto_tree_add_item(asf_tree, hf_asf_type, tvb, 4, 1,ENC_BIG_ENDIAN);
- proto_tree_add_item(asf_tree, hf_asf_tag, tvb, 5, 1,ENC_BIG_ENDIAN);
- proto_tree_add_item(asf_tree, hf_asf_len, tvb, 7, 1,ENC_BIG_ENDIAN);
- }
- if (len) {
- switch(type) {
- case ASF_TYPE_OPEN_SESS_RQST:
- dissect_asf_open_session_request(tvb, pinfo, asf_tree, 8, len);
- break;
- case ASF_TYPE_OPEN_SESS_RESP:
- dissect_asf_open_session_response(tvb, pinfo, asf_tree, 8, len);
- break;
- /* TODO: Add the rest as captures become available to test. */
- default:
- next_tvb = tvb_new_subset(tvb, 8, len, len);
- call_dissector(data_handle, next_tvb, pinfo, tree);
- break;
- }
- }
- return 8 + len;
- }
- static void
- dissect_asf_open_session_request(tvbuff_t *tvb, packet_info *pinfo,
- proto_tree *tree, gint offset, gint len)
- {
- proto_tree_add_item(tree, hf_asf_mgt_console_id, tvb, offset, 4,ENC_BIG_ENDIAN);
- offset += 4;
- len -= 4;
- dissect_asf_payloads(tvb, pinfo, tree, offset, len);
- }
- static void
- dissect_asf_open_session_response(tvbuff_t *tvb, packet_info *pinfo,
- proto_tree *tree, gint offset, gint len)
- {
- proto_tree_add_item(tree, hf_asf_rssp_status_code, tvb, offset, 1,ENC_BIG_ENDIAN);
- proto_tree_add_item(tree, hf_asf_mgt_console_id, tvb, offset + 4, 4,ENC_BIG_ENDIAN);
- proto_tree_add_item(tree, hf_asf_client_id, tvb, offset + 8, 4,ENC_BIG_ENDIAN);
- offset += 12;
- len -= 12;
- dissect_asf_payloads(tvb, pinfo, tree, offset, len);
- }
- static void
- dissect_asf_payloads(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
- gint offset, gint len)
- {
- guint8 ptype;
- guint16 plen;
- proto_item *ti;
- proto_tree *ptree;
- while ( len >= 4 )
- {
- ptype = tvb_get_guint8(tvb, offset);
- plen = tvb_get_ntohs(tvb, offset + 2);
- ti = proto_tree_add_none_format(tree, hf_asf_payload, tvb, offset,
- plen, "%s: %u bytes",
- val_to_str(ptype, asf_payload_type_vals, "Unknown (%u)"), plen);
- ptree = proto_item_add_subtree(ti, ett_asf_payload);
- proto_tree_add_item(ptree, hf_asf_payload_type, tvb, offset, 1,ENC_BIG_ENDIAN);
- ti = proto_tree_add_item(ptree, hf_asf_payload_len, tvb, offset + 2, 2,ENC_BIG_ENDIAN);
- if (plen < 4)
- {
- expert_add_info_format(pinfo, ti, PI_MALFORMED,
- PI_ERROR,
- "Payload length too short to include the type and length");
- break;
- }
- if ( ptype && (plen > 4) )
- {
- switch ( ptype )
- {
- case ASF_PAYLOAD_TYPE_AUTHENTICATION:
- dissect_asf_payload_authentication(tvb, ptree,
- offset + 4, plen - 4);
- break;
- case ASF_PAYLOAD_TYPE_INTEGRITY:
- dissect_asf_payload_integrity(tvb, ptree,
- offset + 4, plen - 4);
- break;
- default:
- proto_tree_add_item(ptree, hf_asf_payload_data, tvb,
- offset + 4, plen - 4,ENC_NA);
- break;
- }
- }
- offset += plen;
- len -= plen;
- }
- }
- static void
- dissect_asf_payload_authentication(tvbuff_t *tvb, proto_tree *tree,
- gint offset, gint len)
- {
- guint8 alg;
- proto_item *ti;
- proto_tree *atree;
- alg = tvb_get_guint8(tvb, offset);
- ti = proto_tree_add_none_format(tree, hf_asf_payload_data, tvb, offset,
- len, "Authentication Algorithm: %s",
- val_to_str(alg, asf_authentication_type_vals, "Unknown (%u)"));
- atree = proto_item_add_subtree(ti, ett_asf_alg_payload);
- proto_tree_add_item(atree, hf_asf_auth_alg, tvb, offset, 1,ENC_BIG_ENDIAN);
- proto_tree_add_item(atree, hf_asf_reserved, tvb, offset + 1, len - 1,ENC_NA);
- }
- static void
- dissect_asf_payload_integrity(tvbuff_t *tvb, proto_tree *tree,
- gint offset, gint len)
- {
- guint8 alg;
- proto_item *ti;
- proto_tree *atree;
- alg = tvb_get_guint8(tvb, offset);
- ti = proto_tree_add_none_format(tree, hf_asf_payload_data, tvb, offset,
- len, "Integrity Algorithm: %s",
- val_to_str(alg, asf_integrity_type_vals, "Unknown (%u)"));
- atree = proto_item_add_subtree(ti, ett_asf_alg_payload);
- proto_tree_add_item(atree, hf_asf_integrity_alg, tvb, offset, 1,ENC_BIG_ENDIAN);
- proto_tree_add_item(atree, hf_asf_reserved, tvb, offset + 1, len - 1,ENC_NA);
- }
- void
- proto_register_asf(void)
- {
- static hf_register_info hf[] = {
- { &hf_asf_iana, {
- "IANA Enterprise Number", "asf.iana",
- FT_UINT32, BASE_DEC|BASE_EXT_STRING, &sminmpec_values_ext, 0,
- NULL, HFILL }},
- { &hf_asf_type, {
- "Message Type", "asf.type",
- FT_UINT8, BASE_HEX, VALS(asf_type_vals), 0,
- "ASF Message Type", HFILL }},
- { &hf_asf_tag, {
- "Message Tag", "asf.tag",
- FT_UINT8, BASE_HEX, NULL, 0,
- "ASF Message Tag", HFILL }},
- { &hf_asf_len, {
- "Data Length", "asf.len",
- FT_UINT8, BASE_DEC, NULL, 0,
- "ASF Data Length", HFILL }},
- { &hf_asf_rssp_status_code, {
- "Status Code", "asf.rssp_status_code",
- FT_UINT8, BASE_DEC, VALS(asf_rssp_status_code_vals), 0,
- "Identifies the status of the previous message", HFILL }},
- { &hf_asf_mgt_console_id, {
- "Mgt Console Session ID", "asf.mgt_console_id",
- FT_UINT32, BASE_DEC, NULL, 0,
- NULL, HFILL }},
- { &hf_asf_client_id, {
- "Managed Client Session ID", "asf.client_id",
- FT_UINT32, BASE_DEC, NULL, 0,
- NULL, HFILL }},
- { &hf_asf_payload, {
- "Payload", "asf.payload",
- FT_NONE, BASE_NONE, NULL, 0,
- NULL, HFILL }},
- { &hf_asf_payload_type, {
- "Payload Type", "asf.payload.type",
- FT_UINT8, BASE_DEC, VALS(asf_payload_type_vals), 0,
- "Identifies the type of payload that follows", HFILL }},
- { &hf_asf_payload_len, {
- "Payload Length", "asf.payload.len",
- FT_UINT16, BASE_DEC, NULL, 0,
- "The total length in bytes of the payload including the header",
- HFILL }},
- { &hf_asf_payload_data, {
- "Data", "asf.payload.data",
- FT_NONE, BASE_NONE, NULL, 0,
- NULL, HFILL }},
- { &hf_asf_auth_alg, {
- "Authentication Algorithm", "asf.auth_alg",
- FT_UINT8, BASE_DEC, VALS(asf_authentication_type_vals), 0,
- NULL, HFILL }},
- { &hf_asf_integrity_alg, {
- "Integrity Algorithm", "asf.integrity_alg",
- FT_UINT8, BASE_DEC, VALS(asf_integrity_type_vals), 0,
- NULL, HFILL }},
- { &hf_asf_reserved, {
- "Reserved", "asf.reserved",
- FT_NONE, BASE_NONE, NULL, 0,
- NULL, HFILL }},
- };
- static gint *ett[] = {
- &ett_asf,
- &ett_asf_payload,
- &ett_asf_alg_payload
- };
- proto_asf = proto_register_protocol(
- "Alert Standard Forum", "ASF", "asf");
- proto_register_field_array(proto_asf, hf, array_length(hf));
- proto_register_subtree_array(ett, array_length(ett));
- }
- void
- proto_reg_handoff_asf(void)
- {
- dissector_handle_t asf_handle;
- data_handle = find_dissector("data");
- asf_handle = new_create_dissector_handle(dissect_asf, proto_asf);
- dissector_add_uint("rmcp.class", RMCP_CLASS_ASF, asf_handle);
- }