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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
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/addr_resolv.h>
/*
* See
* http://www.dmtf.org/standards/standard_alert.php
* https://www.dmtf.org/sites/default/files/standards/documents/DSP0136.pdf
*/
void proto_register_asf(void);
void proto_reg_handoff_asf(void);
static dissector_handle_t asf_handle;
#define RMCP_CLASS_ASF 0x06
static int proto_asf;
static int hf_asf_iana;
static int hf_asf_type;
static int hf_asf_tag;
static int hf_asf_len;
static int hf_asf_rssp_status_code;
static int hf_asf_mgt_console_id;
static int hf_asf_client_id;
static int hf_asf_payload;
static int hf_asf_payload_type;
static int hf_asf_payload_len;
static int hf_asf_payload_data;
static int hf_asf_auth_alg;
static int hf_asf_integrity_alg;
static int hf_asf_reserved;
static int ett_asf;
static int ett_asf_payload;
static int ett_asf_alg_payload;
static expert_field ei_asf_payload_too_short;
#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, int offset, int len);
static void dissect_asf_open_session_response(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *tree, int offset, int len);
static void dissect_asf_payloads(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *tree, int offset, int len);
static void dissect_asf_payload_authentication(tvbuff_t *tvb, proto_tree *tree,
int offset, int len);
static void dissect_asf_payload_integrity(tvbuff_t *tvb, proto_tree *tree,
int offset, int 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;
uint8_t type;
uint8_t len;
tvbuff_t *next_tvb;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ASF");
col_clear(pinfo->cinfo, COL_INFO);
type = tvb_get_uint8(tvb, 4);
len = tvb_get_uint8(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, int offset, int 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, int offset, int 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,
int offset, int len)
{
uint8_t ptype;
uint16_t plen;
proto_item *ti;
proto_tree *ptree;
while ( len >= 4 )
{
ptype = tvb_get_uint8(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,
int offset, int len)
{
uint8_t alg;
proto_item *ti;
proto_tree *atree;
alg = tvb_get_uint8(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,
int offset, int len)
{
uint8_t alg;
proto_item *ti;
proto_tree *atree;
alg = tvb_get_uint8(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_ENTERPRISES, STRINGS_ENTERPRISES, 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 int *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));
asf_handle = register_dissector("asf", dissect_asf, proto_asf);
}
void
proto_reg_handoff_asf(void)
{
dissector_add_uint("rmcp.class", RMCP_CLASS_ASF, asf_handle);
}
/*
* Editor modelines - https://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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