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Copy pathpacket-goose.c
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packet-goose.c
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/* Do not modify this file. Changes will be overwritten. */
/* Generated automatically by the ASN.1 to Wireshark dissector compiler */
/* packet-goose.c */
/* asn2wrs.py -b -q -L -p goose -c ./goose.cnf -s ./packet-goose-template -D . -O ../.. goose.asn */
/* packet-goose.c
* Routines for IEC 61850 GOOSE packet dissection
* Martin Lutz 2008
*
* Routines for IEC 61850 R-GOOSE packet dissection
* Dordije Manojlovic 2020
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <[email protected]>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/asn1.h>
#include <epan/proto_data.h>
#include <epan/etypes.h>
#include <epan/expert.h>
#include <wsutil/array.h>
#include "packet-ber.h"
#include "packet-acse.h"
#define GOOSE_PNAME "GOOSE"
#define GOOSE_PSNAME "GOOSE"
#define GOOSE_PFNAME "goose"
#define R_GOOSE_PNAME "R-GOOSE"
#define R_GOOSE_PSNAME "R-GOOSE"
#define R_GOOSE_PFNAME "r-goose"
void proto_register_goose(void);
void proto_reg_handoff_goose(void);
/* Initialize the protocol and registered fields */
static int proto_goose;
static int proto_r_goose;
static int hf_goose_session_header;
static int hf_goose_spdu_id;
static int hf_goose_session_hdr_length;
static int hf_goose_hdr_length;
static int hf_goose_content_id;
static int hf_goose_spdu_lenth;
static int hf_goose_spdu_num;
static int hf_goose_version;
static int hf_goose_security_info;
static int hf_goose_current_key_t;
static int hf_goose_next_key_t;
static int hf_goose_key_id;
static int hf_goose_init_vec_length;
static int hf_goose_init_vec;
static int hf_goose_session_user_info;
static int hf_goose_payload;
static int hf_goose_payload_length;
static int hf_goose_apdu_tag;
static int hf_goose_apdu_simulation;
static int hf_goose_apdu_appid;
static int hf_goose_apdu_length;
static int hf_goose_padding_tag;
static int hf_goose_padding_length;
static int hf_goose_padding;
static int hf_goose_hmac;
static int hf_goose_appid;
static int hf_goose_length;
static int hf_goose_reserve1;
static int hf_goose_reserve1_s_bit;
static int hf_goose_reserve2;
static int hf_goose_float_value;
/* Bit fields in the Reserved fields */
#define F_RESERVE1_S_BIT 0x8000
/* GOOSE stored data for expert info verifications */
typedef struct _goose_chk_data{
bool s_bit;
}goose_chk_data_t;
#define GOOSE_CHK_DATA_LEN (sizeof(goose_chk_data_t))
static expert_field ei_goose_mal_utctime;
static expert_field ei_goose_zero_pdu;
static expert_field ei_goose_invalid_sim;
static expert_field ei_goose_bogus_length;
#define SINGLE_FLOAT_EXP_BITS 8
#define FLOAT_ENC_LENGTH 5
static int hf_goose_gseMngtPdu; /* GSEMngtPdu */
static int hf_goose_goosePdu; /* IECGoosePdu */
static int hf_goose_stateID; /* INTEGER */
static int hf_goose_requestResp; /* RequestResponse */
static int hf_goose_requests; /* GSEMngtRequests */
static int hf_goose_responses; /* GSEMngtResponses */
static int hf_goose_getGoReference; /* GetReferenceRequestPdu */
static int hf_goose_getGOOSEElementNumber; /* GetElementRequestPdu */
static int hf_goose_getGsReference; /* GetReferenceRequestPdu */
static int hf_goose_getGSSEDataOffset; /* GetElementRequestPdu */
static int hf_goose_gseMngtNotSupported; /* NULL */
static int hf_goose_gseMngtResponses_GetGOReference; /* GSEMngtResponsePdu */
static int hf_goose_gseMngtResponses_GetGOOSEElementNumber; /* GSEMngtResponsePdu */
static int hf_goose_gseMngtResponses_GetGSReference; /* GSEMngtResponsePdu */
static int hf_goose_gseMngtResponses_GetGSSEDataOffset; /* GSEMngtResponsePdu */
static int hf_goose_ident; /* VisibleString */
static int hf_goose_getReferenceRequest_offset; /* T_getReferenceRequest_offset */
static int hf_goose_getReferenceRequest_offset_item; /* INTEGER */
static int hf_goose_references; /* T_references */
static int hf_goose_references_item; /* VisibleString */
static int hf_goose_confRev; /* INTEGER */
static int hf_goose_posNeg; /* PositiveNegative */
static int hf_goose_responsePositive; /* T_responsePositive */
static int hf_goose_datSet; /* VisibleString */
static int hf_goose_result; /* SEQUENCE_OF_RequestResults */
static int hf_goose_result_item; /* RequestResults */
static int hf_goose_responseNegative; /* GlbErrors */
static int hf_goose_offset; /* INTEGER */
static int hf_goose_reference; /* IA5String */
static int hf_goose_error; /* ErrorReason */
static int hf_goose_gocbRef; /* VisibleString */
static int hf_goose_timeAllowedtoLive; /* INTEGER */
static int hf_goose_goID; /* VisibleString */
static int hf_goose_t; /* UtcTime */
static int hf_goose_stNum; /* INTEGER */
static int hf_goose_sqNum; /* INTEGER */
static int hf_goose_simulation; /* T_simulation */
static int hf_goose_ndsCom; /* BOOLEAN */
static int hf_goose_numDatSetEntries; /* INTEGER */
static int hf_goose_allData; /* SEQUENCE_OF_Data */
static int hf_goose_allData_item; /* Data */
static int hf_goose_array; /* SEQUENCE_OF_Data */
static int hf_goose_array_item; /* Data */
static int hf_goose_structure; /* SEQUENCE_OF_Data */
static int hf_goose_structure_item; /* Data */
static int hf_goose_boolean; /* BOOLEAN */
static int hf_goose_bit_string; /* BIT_STRING */
static int hf_goose_integer; /* INTEGER */
static int hf_goose_unsigned; /* INTEGER */
static int hf_goose_floating_point; /* FloatingPoint */
static int hf_goose_real; /* REAL */
static int hf_goose_octet_string; /* OCTET_STRING */
static int hf_goose_visible_string; /* VisibleString */
static int hf_goose_binary_time; /* TimeOfDay */
static int hf_goose_bcd; /* INTEGER */
static int hf_goose_booleanArray; /* BIT_STRING */
static int hf_goose_objId; /* OBJECT_IDENTIFIER */
static int hf_goose_mMSString; /* MMSString */
static int hf_goose_utc_time; /* UtcTime */
/* Initialize the subtree pointers */
static int ett_r_goose;
static int ett_session_header;
static int ett_security_info;
static int ett_session_user_info;
static int ett_payload;
static int ett_padding;
static int ett_goose;
static int ett_reserve1;
static int ett_expert_inf_sim;
static int ett_goose_GOOSEpdu;
static int ett_goose_GSEMngtPdu;
static int ett_goose_RequestResponse;
static int ett_goose_GSEMngtRequests;
static int ett_goose_GSEMngtResponses;
static int ett_goose_GetReferenceRequestPdu;
static int ett_goose_T_getReferenceRequest_offset;
static int ett_goose_GetElementRequestPdu;
static int ett_goose_T_references;
static int ett_goose_GSEMngtResponsePdu;
static int ett_goose_PositiveNegative;
static int ett_goose_T_responsePositive;
static int ett_goose_SEQUENCE_OF_RequestResults;
static int ett_goose_RequestResults;
static int ett_goose_IECGoosePdu;
static int ett_goose_SEQUENCE_OF_Data;
static int ett_goose_Data;
/*--- Cyclic dependencies ---*/
/* Data -> Data/array -> Data */
static int dissect_goose_Data(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_);
static int
dissect_goose_INTEGER(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static int
dissect_goose_VisibleString(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_restricted_string(implicit_tag, BER_UNI_TAG_VisibleString,
actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static const ber_sequence_t T_getReferenceRequest_offset_sequence_of[1] = {
{ &hf_goose_getReferenceRequest_offset_item, BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_goose_INTEGER },
};
static int
dissect_goose_T_getReferenceRequest_offset(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence_of(implicit_tag, actx, tree, tvb, offset,
T_getReferenceRequest_offset_sequence_of, hf_index, ett_goose_T_getReferenceRequest_offset);
return offset;
}
static const ber_sequence_t GetReferenceRequestPdu_sequence[] = {
{ &hf_goose_ident , BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_goose_VisibleString },
{ &hf_goose_getReferenceRequest_offset, BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_T_getReferenceRequest_offset },
{ NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_GetReferenceRequestPdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
GetReferenceRequestPdu_sequence, hf_index, ett_goose_GetReferenceRequestPdu);
return offset;
}
static const ber_sequence_t T_references_sequence_of[1] = {
{ &hf_goose_references_item, BER_CLASS_UNI, BER_UNI_TAG_VisibleString, BER_FLAGS_NOOWNTAG, dissect_goose_VisibleString },
};
static int
dissect_goose_T_references(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence_of(implicit_tag, actx, tree, tvb, offset,
T_references_sequence_of, hf_index, ett_goose_T_references);
return offset;
}
static const ber_sequence_t GetElementRequestPdu_sequence[] = {
{ &hf_goose_ident , BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_goose_VisibleString },
{ &hf_goose_references , BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_T_references },
{ NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_GetElementRequestPdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
GetElementRequestPdu_sequence, hf_index, ett_goose_GetElementRequestPdu);
return offset;
}
static const value_string goose_GSEMngtRequests_vals[] = {
{ 1, "getGoReference" },
{ 2, "getGOOSEElementNumber" },
{ 3, "getGsReference" },
{ 4, "getGSSEDataOffset" },
{ 0, NULL }
};
static const ber_choice_t GSEMngtRequests_choice[] = {
{ 1, &hf_goose_getGoReference, BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_GetReferenceRequestPdu },
{ 2, &hf_goose_getGOOSEElementNumber, BER_CLASS_CON, 2, BER_FLAGS_IMPLTAG, dissect_goose_GetElementRequestPdu },
{ 3, &hf_goose_getGsReference, BER_CLASS_CON, 3, BER_FLAGS_IMPLTAG, dissect_goose_GetReferenceRequestPdu },
{ 4, &hf_goose_getGSSEDataOffset, BER_CLASS_CON, 4, BER_FLAGS_IMPLTAG, dissect_goose_GetElementRequestPdu },
{ 0, NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_GSEMngtRequests(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_choice(actx, tree, tvb, offset,
GSEMngtRequests_choice, hf_index, ett_goose_GSEMngtRequests,
NULL);
return offset;
}
static int
dissect_goose_NULL(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_null(implicit_tag, actx, tree, tvb, offset, hf_index);
return offset;
}
static int
dissect_goose_IA5String(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_restricted_string(implicit_tag, BER_UNI_TAG_IA5String,
actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static const value_string goose_ErrorReason_vals[] = {
{ 0, "other" },
{ 1, "notFound" },
{ 0, NULL }
};
static int
dissect_goose_ErrorReason(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static const value_string goose_RequestResults_vals[] = {
{ 0, "offset" },
{ 1, "reference" },
{ 2, "error" },
{ 0, NULL }
};
static const ber_choice_t RequestResults_choice[] = {
{ 0, &hf_goose_offset , BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ 1, &hf_goose_reference , BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_IA5String },
{ 2, &hf_goose_error , BER_CLASS_CON, 2, BER_FLAGS_IMPLTAG, dissect_goose_ErrorReason },
{ 0, NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_RequestResults(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_choice(actx, tree, tvb, offset,
RequestResults_choice, hf_index, ett_goose_RequestResults,
NULL);
return offset;
}
static const ber_sequence_t SEQUENCE_OF_RequestResults_sequence_of[1] = {
{ &hf_goose_result_item , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_goose_RequestResults },
};
static int
dissect_goose_SEQUENCE_OF_RequestResults(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence_of(implicit_tag, actx, tree, tvb, offset,
SEQUENCE_OF_RequestResults_sequence_of, hf_index, ett_goose_SEQUENCE_OF_RequestResults);
return offset;
}
static const ber_sequence_t T_responsePositive_sequence[] = {
{ &hf_goose_datSet , BER_CLASS_CON, 0, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_goose_VisibleString },
{ &hf_goose_result , BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_SEQUENCE_OF_RequestResults },
{ NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_T_responsePositive(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
T_responsePositive_sequence, hf_index, ett_goose_T_responsePositive);
return offset;
}
static const value_string goose_GlbErrors_vals[] = {
{ 0, "other" },
{ 1, "unknownControlBlock" },
{ 2, "responseTooLarge" },
{ 3, "controlBlockConfigurationError" },
{ 0, NULL }
};
static int
dissect_goose_GlbErrors(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static const value_string goose_PositiveNegative_vals[] = {
{ 2, "responsePositive" },
{ 3, "responseNegative" },
{ 0, NULL }
};
static const ber_choice_t PositiveNegative_choice[] = {
{ 2, &hf_goose_responsePositive, BER_CLASS_CON, 2, BER_FLAGS_IMPLTAG, dissect_goose_T_responsePositive },
{ 3, &hf_goose_responseNegative, BER_CLASS_CON, 3, BER_FLAGS_IMPLTAG, dissect_goose_GlbErrors },
{ 0, NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_PositiveNegative(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_choice(actx, tree, tvb, offset,
PositiveNegative_choice, hf_index, ett_goose_PositiveNegative,
NULL);
return offset;
}
static const ber_sequence_t GSEMngtResponsePdu_sequence[] = {
{ &hf_goose_ident , BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_goose_VisibleString },
{ &hf_goose_confRev , BER_CLASS_CON, 1, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ &hf_goose_posNeg , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_goose_PositiveNegative },
{ NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_GSEMngtResponsePdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
GSEMngtResponsePdu_sequence, hf_index, ett_goose_GSEMngtResponsePdu);
return offset;
}
static const value_string goose_GSEMngtResponses_vals[] = {
{ 0, "gseMngtNotSupported" },
{ 1, "getGoReference" },
{ 2, "getGOOSEElementNumber" },
{ 3, "getGsReference" },
{ 4, "getGSSEDataOffset" },
{ 0, NULL }
};
static const ber_choice_t GSEMngtResponses_choice[] = {
{ 0, &hf_goose_gseMngtNotSupported, BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_goose_NULL },
{ 1, &hf_goose_gseMngtResponses_GetGOReference, BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_GSEMngtResponsePdu },
{ 2, &hf_goose_gseMngtResponses_GetGOOSEElementNumber, BER_CLASS_CON, 2, BER_FLAGS_IMPLTAG, dissect_goose_GSEMngtResponsePdu },
{ 3, &hf_goose_gseMngtResponses_GetGSReference, BER_CLASS_CON, 3, BER_FLAGS_IMPLTAG, dissect_goose_GSEMngtResponsePdu },
{ 4, &hf_goose_gseMngtResponses_GetGSSEDataOffset, BER_CLASS_CON, 4, BER_FLAGS_IMPLTAG, dissect_goose_GSEMngtResponsePdu },
{ 0, NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_GSEMngtResponses(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_choice(actx, tree, tvb, offset,
GSEMngtResponses_choice, hf_index, ett_goose_GSEMngtResponses,
NULL);
return offset;
}
static const value_string goose_RequestResponse_vals[] = {
{ 1, "requests" },
{ 2, "responses" },
{ 0, NULL }
};
static const ber_choice_t RequestResponse_choice[] = {
{ 1, &hf_goose_requests , BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_GSEMngtRequests },
{ 2, &hf_goose_responses , BER_CLASS_CON, 2, BER_FLAGS_IMPLTAG, dissect_goose_GSEMngtResponses },
{ 0, NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_RequestResponse(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_choice(actx, tree, tvb, offset,
RequestResponse_choice, hf_index, ett_goose_RequestResponse,
NULL);
return offset;
}
static const ber_sequence_t GSEMngtPdu_sequence[] = {
{ &hf_goose_stateID , BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ &hf_goose_requestResp , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_goose_RequestResponse },
{ NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_GSEMngtPdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
GSEMngtPdu_sequence, hf_index, ett_goose_GSEMngtPdu);
return offset;
}
static int
dissect_goose_UtcTime(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
uint32_t len;
uint32_t seconds;
uint32_t fraction;
uint32_t nanoseconds;
nstime_t ts;
char * ptime;
len = tvb_reported_length_remaining(tvb, offset);
if(len != 8)
{
proto_tree_add_expert(tree, actx->pinfo, &ei_goose_mal_utctime, tvb, offset, len);
if(hf_index > 0)
{
proto_tree_add_string(tree, hf_index, tvb, offset, len, "????");
}
return offset;
}
seconds = tvb_get_ntohl(tvb, offset);
fraction = tvb_get_ntoh24(tvb, offset+4) * 0x100; /* Only 3 bytes are recommended */
nanoseconds = (uint32_t)( ((uint64_t)fraction * UINT64_C(1000000000)) / UINT64_C(0x100000000) ) ;
ts.secs = seconds;
ts.nsecs = nanoseconds;
ptime = abs_time_to_str(actx->pinfo->pool, &ts, ABSOLUTE_TIME_UTC, true);
if(hf_index > 0)
{
proto_tree_add_string(tree, hf_index, tvb, offset, len, ptime);
}
return offset;
}
static int
dissect_goose_T_simulation(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
bool value;
uint32_t len = tvb_reported_length_remaining(tvb, offset);
int origin_offset = offset;
offset = dissect_ber_boolean(implicit_tag, actx, tree, tvb, offset, hf_index, &value);
if((actx->private_data) && (actx->created_item)){
goose_chk_data_t *data_chk = (goose_chk_data_t *)actx->private_data;
proto_tree *expert_inf_tree = NULL;
/* S bit set and Simulation attribute clear: reject as invalid GOOSE */
if((data_chk->s_bit == true) && (value == false)){
/* It really looks better showed as a new subtree */
expert_inf_tree = proto_item_add_subtree(actx->created_item, ett_expert_inf_sim);
proto_tree_add_expert(expert_inf_tree, actx->pinfo, &ei_goose_invalid_sim, tvb, origin_offset, len);
}
}
return offset;
}
static int
dissect_goose_BOOLEAN(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_boolean(implicit_tag, actx, tree, tvb, offset, hf_index, NULL);
return offset;
}
static const ber_sequence_t SEQUENCE_OF_Data_sequence_of[1] = {
{ &hf_goose_allData_item , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_goose_Data },
};
static int
dissect_goose_SEQUENCE_OF_Data(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence_of(implicit_tag, actx, tree, tvb, offset,
SEQUENCE_OF_Data_sequence_of, hf_index, ett_goose_SEQUENCE_OF_Data);
return offset;
}
static int
dissect_goose_BIT_STRING(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_bitstring(implicit_tag, actx, tree, tvb, offset,
NULL, 0, hf_index, -1,
NULL);
return offset;
}
static int
dissect_goose_FloatingPoint(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
int len = tvb_reported_length_remaining(tvb, offset);
offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
NULL);
if ((len == FLOAT_ENC_LENGTH) && (tvb_get_uint8(tvb,0) == SINGLE_FLOAT_EXP_BITS) ){
/* IEEE 754 single precision floating point */
proto_item_set_hidden(actx->created_item);
proto_tree_add_item(tree, hf_goose_float_value, tvb, 1, (FLOAT_ENC_LENGTH-1), ENC_BIG_ENDIAN);
}
return offset;
}
static int
dissect_goose_REAL(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_real(implicit_tag, actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static int
dissect_goose_OCTET_STRING(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static int
dissect_goose_TimeOfDay(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static int
dissect_goose_OBJECT_IDENTIFIER(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_object_identifier(implicit_tag, actx, tree, tvb, offset, hf_index, NULL);
return offset;
}
static int
dissect_goose_MMSString(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_restricted_string(implicit_tag, BER_UNI_TAG_UTF8String,
actx, tree, tvb, offset, hf_index,
NULL);
return offset;
}
static const value_string goose_Data_vals[] = {
{ 1, "array" },
{ 2, "structure" },
{ 3, "boolean" },
{ 4, "bit-string" },
{ 5, "integer" },
{ 6, "unsigned" },
{ 7, "floating-point" },
{ 8, "real" },
{ 9, "octet-string" },
{ 10, "visible-string" },
{ 12, "binary-time" },
{ 13, "bcd" },
{ 14, "booleanArray" },
{ 15, "objId" },
{ 16, "mMSString" },
{ 17, "utc-time" },
{ 0, NULL }
};
static const ber_choice_t Data_choice[] = {
{ 1, &hf_goose_array , BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_SEQUENCE_OF_Data },
{ 2, &hf_goose_structure , BER_CLASS_CON, 2, BER_FLAGS_IMPLTAG, dissect_goose_SEQUENCE_OF_Data },
{ 3, &hf_goose_boolean , BER_CLASS_CON, 3, BER_FLAGS_IMPLTAG, dissect_goose_BOOLEAN },
{ 4, &hf_goose_bit_string , BER_CLASS_CON, 4, BER_FLAGS_IMPLTAG, dissect_goose_BIT_STRING },
{ 5, &hf_goose_integer , BER_CLASS_CON, 5, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ 6, &hf_goose_unsigned , BER_CLASS_CON, 6, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ 7, &hf_goose_floating_point, BER_CLASS_CON, 7, BER_FLAGS_IMPLTAG, dissect_goose_FloatingPoint },
{ 8, &hf_goose_real , BER_CLASS_CON, 8, BER_FLAGS_IMPLTAG, dissect_goose_REAL },
{ 9, &hf_goose_octet_string , BER_CLASS_CON, 9, BER_FLAGS_IMPLTAG, dissect_goose_OCTET_STRING },
{ 10, &hf_goose_visible_string, BER_CLASS_CON, 10, BER_FLAGS_IMPLTAG, dissect_goose_VisibleString },
{ 12, &hf_goose_binary_time , BER_CLASS_CON, 12, BER_FLAGS_IMPLTAG, dissect_goose_TimeOfDay },
{ 13, &hf_goose_bcd , BER_CLASS_CON, 13, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ 14, &hf_goose_booleanArray , BER_CLASS_CON, 14, BER_FLAGS_IMPLTAG, dissect_goose_BIT_STRING },
{ 15, &hf_goose_objId , BER_CLASS_CON, 15, BER_FLAGS_IMPLTAG, dissect_goose_OBJECT_IDENTIFIER },
{ 16, &hf_goose_mMSString , BER_CLASS_CON, 16, BER_FLAGS_IMPLTAG, dissect_goose_MMSString },
{ 17, &hf_goose_utc_time , BER_CLASS_CON, 17, BER_FLAGS_IMPLTAG, dissect_goose_UtcTime },
{ 0, NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_Data(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
// Data -> Data/array -> Data
actx->pinfo->dissection_depth += 2;
increment_dissection_depth(actx->pinfo);
offset = dissect_ber_choice(actx, tree, tvb, offset,
Data_choice, hf_index, ett_goose_Data,
NULL);
actx->pinfo->dissection_depth -= 2;
decrement_dissection_depth(actx->pinfo);
return offset;
}
static const ber_sequence_t IECGoosePdu_sequence[] = {
{ &hf_goose_gocbRef , BER_CLASS_CON, 0, BER_FLAGS_IMPLTAG, dissect_goose_VisibleString },
{ &hf_goose_timeAllowedtoLive, BER_CLASS_CON, 1, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ &hf_goose_datSet , BER_CLASS_CON, 2, BER_FLAGS_IMPLTAG, dissect_goose_VisibleString },
{ &hf_goose_goID , BER_CLASS_CON, 3, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_goose_VisibleString },
{ &hf_goose_t , BER_CLASS_CON, 4, BER_FLAGS_IMPLTAG, dissect_goose_UtcTime },
{ &hf_goose_stNum , BER_CLASS_CON, 5, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ &hf_goose_sqNum , BER_CLASS_CON, 6, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ &hf_goose_simulation , BER_CLASS_CON, 7, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_goose_T_simulation },
{ &hf_goose_confRev , BER_CLASS_CON, 8, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ &hf_goose_ndsCom , BER_CLASS_CON, 9, BER_FLAGS_OPTIONAL|BER_FLAGS_IMPLTAG, dissect_goose_BOOLEAN },
{ &hf_goose_numDatSetEntries, BER_CLASS_CON, 10, BER_FLAGS_IMPLTAG, dissect_goose_INTEGER },
{ &hf_goose_allData , BER_CLASS_CON, 11, BER_FLAGS_IMPLTAG, dissect_goose_SEQUENCE_OF_Data },
{ NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_IECGoosePdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
IECGoosePdu_sequence, hf_index, ett_goose_IECGoosePdu);
return offset;
}
static const ber_choice_t GOOSEpdu_choice[] = {
{ 0, &hf_goose_gseMngtPdu , BER_CLASS_APP, 0, BER_FLAGS_IMPLTAG, dissect_goose_GSEMngtPdu },
{ 1, &hf_goose_goosePdu , BER_CLASS_APP, 1, BER_FLAGS_IMPLTAG, dissect_goose_IECGoosePdu },
{ 0, NULL, 0, 0, 0, NULL }
};
static int
dissect_goose_GOOSEpdu(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
offset = dissect_ber_choice(actx, tree, tvb, offset,
GOOSEpdu_choice, hf_index, ett_goose_GOOSEpdu,
NULL);
return offset;
}
static dissector_handle_t goose_handle;
#define OSI_SPDU_TUNNELED 0xA0 /* Tunneled */
#define OSI_SPDU_GOOSE 0xA1 /* GOOSE */
#define OSI_SPDU_SV 0xA2 /* Sample Value */
#define OSI_SPDU_MNGT 0xA3 /* Management */
static const value_string ositp_spdu_id[] = {
{ OSI_SPDU_TUNNELED, "Tunneled" },
{ OSI_SPDU_GOOSE, "GOOSE" },
{ OSI_SPDU_SV, "Sample value" },
{ OSI_SPDU_MNGT, "Management" },
{ 0, NULL }
};
#define OSI_PDU_GOOSE 0x81
#define OSI_PDU_SV 0x82
#define OSI_PDU_TUNNELED 0x83
#define OSI_PDU_MNGT 0x84
static const value_string ositp_pdu_id[] = {
{ OSI_PDU_GOOSE, "GOOSE" },
{ OSI_PDU_SV, "SV" },
{ OSI_PDU_TUNNELED, "Tunnel" },
{ OSI_PDU_MNGT, "MNGT" },
{ 0, NULL }
};
#define APDU_HEADER_SIZE 6
/*
* Dissect GOOSE PDUs inside a PPDU.
*/
static int
dissect_goose(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree,
void* data _U_)
{
uint32_t offset = 0;
uint32_t old_offset;
uint32_t length;
uint32_t reserve1_val;
proto_item *item = NULL;
proto_item *tree_item = NULL;
proto_tree *tree = NULL;
goose_chk_data_t *data_chk = NULL;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, true, pinfo);
static int * const reserve1_flags[] = {
&hf_goose_reserve1_s_bit,
NULL
};
asn1_ctx.private_data = wmem_alloc(pinfo->pool, GOOSE_CHK_DATA_LEN);
data_chk = (goose_chk_data_t *)asn1_ctx.private_data;
col_set_str(pinfo->cinfo, COL_PROTOCOL, GOOSE_PNAME);
col_clear(pinfo->cinfo, COL_INFO);
tree_item = proto_tree_add_item(parent_tree, proto_goose, tvb, 0, -1, ENC_NA);
tree = proto_item_add_subtree(tree_item, ett_goose);
add_ber_encoded_label(tvb, pinfo, parent_tree);
/* APPID */
proto_tree_add_item(tree, hf_goose_appid, tvb, offset, 2, ENC_BIG_ENDIAN);
/* Length */
item = proto_tree_add_item_ret_uint(tree, hf_goose_length, tvb, offset + 2, 2,
ENC_BIG_ENDIAN, &length);
if (length < 8) {
expert_add_info(pinfo, item, &ei_goose_bogus_length);
}
set_actual_length(tvb, length);
proto_item_set_len(tree_item, length);
/* Reserved 1 */
reserve1_val = tvb_get_uint16(tvb, offset + 4, ENC_BIG_ENDIAN);
proto_tree_add_bitmask_value(tree, tvb, offset + 4, hf_goose_reserve1, ett_reserve1,
reserve1_flags, reserve1_val);
/* Store the header sim value for later expert info checks */
if(data_chk){
if(reserve1_val & F_RESERVE1_S_BIT){
data_chk->s_bit = true;
}else{
data_chk->s_bit = false;
}
}
/* Reserved 2 */
proto_tree_add_item(tree, hf_goose_reserve2, tvb, offset + 6, 2,
ENC_BIG_ENDIAN);
offset = 8;
while (offset < length){
old_offset = offset;
offset = dissect_goose_GOOSEpdu(false, tvb, offset, &asn1_ctx , tree, -1);
if (offset == old_offset) {
proto_tree_add_expert(tree, pinfo, &ei_goose_zero_pdu, tvb, offset, -1);
break;
}
}
return tvb_captured_length(tvb);
}
/*
* Dissect RGOOSE PDUs inside ISO 8602/X.234 CLTP ConnecteionLess
* Transport Protocol.
*/
static int
dissect_rgoose(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree,
void* data _U_)
{
unsigned offset = 0, old_offset = 0;
uint32_t init_v_length, payload_tag, padding_length, length;
uint32_t payload_length, apdu_offset = 0, apdu_length, apdu_simulation;
proto_item *item = NULL;
proto_tree *tree = NULL, *r_goose_tree = NULL, *sess_user_info_tree = NULL;
goose_chk_data_t *data_chk = NULL;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, true, pinfo);
asn1_ctx.private_data = wmem_alloc(pinfo->pool, GOOSE_CHK_DATA_LEN);
data_chk = (goose_chk_data_t *)asn1_ctx.private_data;
col_set_str(pinfo->cinfo, COL_PROTOCOL, R_GOOSE_PNAME);
col_clear(pinfo->cinfo, COL_INFO);
item = proto_tree_add_item(parent_tree, proto_r_goose, tvb, 0, -1, ENC_NA);
r_goose_tree = proto_item_add_subtree(item, ett_r_goose);
/* Session header subtree */
item = proto_tree_add_item(r_goose_tree, hf_goose_session_header, tvb, 0,
-1, ENC_NA);
tree = proto_item_add_subtree(item, ett_session_header);
/* SPDU ID */
proto_tree_add_item(tree, hf_goose_spdu_id, tvb, offset++, 1,
ENC_BIG_ENDIAN);
/* Session header length */
proto_tree_add_item_ret_uint(tree, hf_goose_session_hdr_length, tvb, offset++, 1,
ENC_BIG_ENDIAN, &length);
proto_item_set_len(item, length + 2);
/* Header content indicator */
proto_tree_add_item(tree, hf_goose_content_id, tvb, offset++, 1,
ENC_BIG_ENDIAN);
/* Length */
proto_tree_add_item(tree, hf_goose_hdr_length, tvb, offset++, 1,
ENC_BIG_ENDIAN);
/* SPDU length */
proto_tree_add_item(tree, hf_goose_spdu_lenth, tvb, offset, 4,
ENC_BIG_ENDIAN);
offset += 4;
/* SPDU number */
proto_tree_add_item(tree, hf_goose_spdu_num, tvb, offset, 4,
ENC_BIG_ENDIAN);
offset += 4;
/* Version */
proto_tree_add_item(tree, hf_goose_version, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* Security information subtree */
item = proto_tree_add_item(tree, hf_goose_security_info, tvb, offset, -1,
ENC_NA);
tree = proto_item_add_subtree(item, ett_security_info);
/* Time of current key */
proto_tree_add_item(tree, hf_goose_current_key_t, tvb, offset, 4,
ENC_BIG_ENDIAN);
offset += 4;
/* Time of next key */
proto_tree_add_item(tree, hf_goose_next_key_t, tvb, offset, 2,
ENC_BIG_ENDIAN);
offset += 2;
/* Key ID */
proto_tree_add_item(tree, hf_goose_key_id, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
/* Initialization vector length */
proto_tree_add_item_ret_uint(tree, hf_goose_init_vec_length, tvb, offset++, 1,
ENC_BIG_ENDIAN, &init_v_length);
proto_item_set_len(item, init_v_length + 11);
if (init_v_length > 0) {
/* Initialization vector bytes */
proto_tree_add_item(tree, hf_goose_init_vec, tvb, offset, init_v_length,
ENC_NA);
}
offset += init_v_length;
/* Session user information subtree */
item = proto_tree_add_item(r_goose_tree, hf_goose_session_user_info, tvb,
offset, -1, ENC_NA);
sess_user_info_tree = proto_item_add_subtree(item, ett_payload);
/* Payload subtree */
item = proto_tree_add_item(sess_user_info_tree, hf_goose_payload, tvb,
offset, -1, ENC_NA);
tree = proto_item_add_subtree(item, ett_payload);
/* Payload length */
proto_tree_add_item_ret_uint(tree, hf_goose_payload_length, tvb, offset, 4,
ENC_BIG_ENDIAN, &payload_length);
offset += 4;
while (apdu_offset < payload_length){
/* APDU tag */
proto_tree_add_item_ret_uint(tree, hf_goose_apdu_tag, tvb, offset++, 1,
ENC_BIG_ENDIAN, &payload_tag);
/* Simulation flag */
proto_tree_add_item_ret_uint(tree, hf_goose_apdu_simulation, tvb, offset++,
1, ENC_BIG_ENDIAN, &apdu_simulation);
/* APPID */
proto_tree_add_item(tree, hf_goose_apdu_appid, tvb, offset, 2,
ENC_BIG_ENDIAN);
offset += 2;
if (payload_tag != OSI_PDU_GOOSE) {
return tvb_captured_length(tvb);
}
/* Store the header sim value for later expert info checks */
if(data_chk){
if(apdu_simulation){
data_chk->s_bit = true;
}else{
data_chk->s_bit = false;
}
}