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wireshark/epan/dissectors/packet-asf.c
Michael Mann 1e60d63c8c Create call_data_dissector() to call data dissector. 
This saves many dissectors the need to find the data dissector and store a handle to it.

There were also some that were finding it, but not using it.
For others this was the only reason for their handoff function, so it could be eliminated.

Change-Id: I5d3f951ee1daa3d30c060d21bd12bbc881a8027b
Reviewed-on: https://code.wireshark.org/review/14530
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Michael Mann <mmann78@netscape.net>
2016-03-20 17:38:03 +00:00

406 lines
13 KiB
C
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/* packet-asf.c
* Routines for ASF packet dissection
*
* Duncan Laurie <duncan@sun.com>
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.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
*/
void proto_register_asf(void);
void proto_reg_handoff_asf(void);
#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 gint ett_asf = -1;
static gint ett_asf_payload = -1;
static gint ett_asf_alg_payload = -1;
static expert_field ei_asf_payload_too_short = EI_INIT;
#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, void *data _U_)
{
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_length(tvb, 8, len);
call_data_dissector(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(pinfo, ti, &ei_asf_payload_too_short);
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
};
static ei_register_info ei[] = {
{ &ei_asf_payload_too_short, { "asf.payload_too_short", PI_MALFORMED, PI_ERROR, "Payload length too short to include the type and length", EXPFILL }},
};
expert_module_t* expert_asf;
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));
expert_asf = expert_register_protocol(proto_asf);
expert_register_field_array(expert_asf, ei, array_length(ei));
}
void
proto_reg_handoff_asf(void)
{
dissector_handle_t asf_handle;
asf_handle = create_dissector_handle(dissect_asf, proto_asf);
dissector_add_uint("rmcp.class", RMCP_CLASS_ASF, asf_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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