/* decode the service request only */ int whohas_decode_service_request( uint8_t * apdu, unsigned apdu_len, BACNET_WHO_HAS_DATA * data) { int len = 0; uint8_t tag_number = 0; uint32_t len_value = 0; uint32_t decoded_value = 0; /* for decoding */ uint16_t decoded_type = 0; /* for decoding */ if (apdu_len && data) { /* optional limits - must be used as a pair */ if (decode_is_context_tag(&apdu[len], 0)) { len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); len += decode_unsigned(&apdu[len], len_value, &decoded_value); if (decoded_value <= BACNET_MAX_INSTANCE) data->low_limit = decoded_value; if (!decode_is_context_tag(&apdu[len], 1)) return -1; len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); len += decode_unsigned(&apdu[len], len_value, &decoded_value); if (decoded_value <= BACNET_MAX_INSTANCE) data->high_limit = decoded_value; } else { data->low_limit = -1; data->high_limit = -1; } /* object id */ if (decode_is_context_tag(&apdu[len], 2)) { data->object_name = false; len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); len += decode_object_id(&apdu[len], &decoded_type, &data->object.identifier.instance); data->object.identifier.type = decoded_type; } /* object name */ else if (decode_is_context_tag(&apdu[len], 3)) { data->object_name = true; len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); len += decode_character_string(&apdu[len], len_value, &data->object.name); } /* missing required parameters */ else return -1; } return len; }
/* decode the service request only */ int ihave_decode_service_request( uint8_t * apdu, unsigned apdu_len, BACNET_I_HAVE_DATA * data) { int len = 0; uint8_t tag_number = 0; uint32_t len_value = 0; uint16_t decoded_type = 0; /* for decoding */ if (apdu_len && data) { /* deviceIdentifier */ len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); if (tag_number == BACNET_APPLICATION_TAG_OBJECT_ID) { len += decode_object_id(&apdu[len], &decoded_type, &data->device_id.instance); data->device_id.type = decoded_type; } else return -1; /* objectIdentifier */ len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); if (tag_number == BACNET_APPLICATION_TAG_OBJECT_ID) { len += decode_object_id(&apdu[len], &decoded_type, &data->object_id.instance); data->object_id.type = decoded_type; } else return -1; /* objectName */ len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); if (tag_number == BACNET_APPLICATION_TAG_CHARACTER_STRING) { len += decode_character_string(&apdu[len], len_value, &data->object_name); } else return -1; } else return -1; return len; }
/* decode the service request only */ int rd_decode_service_request( uint8_t * apdu, unsigned apdu_len, BACNET_REINITIALIZED_STATE * state, BACNET_CHARACTER_STRING * password) { unsigned len = 0; uint8_t tag_number = 0; uint32_t len_value_type = 0; uint32_t value = 0; /* check for value pointers */ if (apdu_len) { /* Tag 0: reinitializedStateOfDevice */ if (!decode_is_context_tag(&apdu[len], 0)) return -1; len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value_type); len += decode_enumerated(&apdu[len], len_value_type, &value); if (state) *state = (BACNET_REINITIALIZED_STATE) value; /* Tag 1: password - optional */ if (len < apdu_len) { if (!decode_is_context_tag(&apdu[len], 1)) return -1; len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value_type); len += decode_character_string(&apdu[len], len_value_type, password); } } return (int) len; }
void DecodeBlock( char cBlockNum, uint8_t * pData) { int iLen; uint32_t ulTemp; int tag_len; uint8_t tag_number; uint32_t len_value_type; BACNET_CHARACTER_STRING bsName; DATABLOCK Response; iLen = 0; if (cBlockNum >= MY_MAX_BLOCK) return; tag_len = decode_tag_number_and_value(&pData[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) return; iLen += decode_unsigned(&pData[iLen], len_value_type, &ulTemp); Response.cMyByte1 = (char) ulTemp; tag_len = decode_tag_number_and_value(&pData[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) return; iLen += decode_unsigned(&pData[iLen], len_value_type, &ulTemp); Response.cMyByte2 = (char) ulTemp; tag_len = decode_tag_number_and_value(&pData[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_REAL) return; iLen += decode_real(&pData[iLen], &Response.fMyReal); tag_len = decode_tag_number_and_value(&pData[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_CHARACTER_STRING) return; iLen += decode_character_string(&pData[iLen], len_value_type, &bsName); strncpy(Response.sMyString, characterstring_value(&bsName), MY_MAX_STR); Response.sMyString[MY_MAX_STR] = '\0'; /* Make sure it is nul terminated */ printf("Private Transfer Read Block Response\n"); printf("Data Block: %d\n", (int) cBlockNum); printf(" First Byte : %d\n", (int) Response.cMyByte1); printf(" Second Byte : %d\n", (int) Response.cMyByte2); printf(" Real : %f\n", Response.fMyReal); printf(" String : %s\n\n", Response.sMyString); }
static void ProcessPT( BACNET_PRIVATE_TRANSFER_DATA * data) { int iLen; /* Index to current location in data */ char cBlockNumber; uint32_t ulTemp; int tag_len; uint8_t tag_number; uint32_t len_value_type; BACNET_CHARACTER_STRING bsTemp; iLen = 0; /* Decode the block number */ tag_len = decode_tag_number_and_value(&data->serviceParameters[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) { /* Bail out early if wrong type */ /* and signal unexpected error */ data->serviceParametersLen = 0; return; } iLen += decode_unsigned(&data->serviceParameters[iLen], len_value_type, &ulTemp); cBlockNumber = (char) ulTemp; if (cBlockNumber < MY_MAX_BLOCK) { if (data->serviceNumber == MY_SVC_READ) { /* Read Response is an unsigned int with 0 for success or a non 0 error code For a successful read the 0 success code is followed by the block number and then the block contents which consist of 2 unsigned ints (in 0 to 255 range as they are really chars) a single precision real and a string which will be up to 32 chars + a nul */ iLen = 0; /* Signal success */ iLen += encode_application_unsigned(&IOBufferPT[iLen], MY_ERR_OK); /* Followed by the block number */ iLen += encode_application_unsigned(&IOBufferPT[iLen], cBlockNumber); /* And Then the block contents */ iLen += encode_application_unsigned(&IOBufferPT[iLen], MyData[(int8_t) cBlockNumber].cMyByte1); iLen += encode_application_unsigned(&IOBufferPT[iLen], MyData[(int8_t) cBlockNumber].cMyByte2); iLen += encode_application_real(&IOBufferPT[iLen], MyData[(int8_t) cBlockNumber].fMyReal); characterstring_init_ansi(&bsTemp, (char *) MyData[(int8_t) cBlockNumber].sMyString); iLen += encode_application_character_string(&IOBufferPT[iLen], &bsTemp); } else { /* Write operation */ /* Write block consists of the block number followed by the block contents as described above for the read operation. The returned result is an unsigned response which is 0 for success and a non 0 error code otherwise. */ tag_len = decode_tag_number_and_value(&data->serviceParameters[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) { data->serviceParametersLen = 0; return; } iLen += decode_unsigned(&data->serviceParameters[iLen], len_value_type, &ulTemp); MyData[(int8_t) cBlockNumber].cMyByte1 = (char) ulTemp; tag_len = decode_tag_number_and_value(&data->serviceParameters[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) { data->serviceParametersLen = 0; return; } iLen += decode_unsigned(&data->serviceParameters[iLen], len_value_type, &ulTemp); MyData[(int8_t) cBlockNumber].cMyByte2 = (char) ulTemp; tag_len = decode_tag_number_and_value(&data->serviceParameters[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_REAL) { data->serviceParametersLen = 0; return; } iLen += decode_real(&data->serviceParameters[iLen], &MyData[(int8_t) cBlockNumber].fMyReal); tag_len = decode_tag_number_and_value(&data->serviceParameters[iLen], &tag_number, &len_value_type); iLen += tag_len; if (tag_number != BACNET_APPLICATION_TAG_CHARACTER_STRING) { data->serviceParametersLen = 0; return; } decode_character_string(&data->serviceParameters[iLen], len_value_type, &bsTemp); /* Only copy as much as we can accept */ strncpy((char *) MyData[(int8_t) cBlockNumber].sMyString, characterstring_value(&bsTemp), MY_MAX_STR); /* Make sure it is nul terminated */ MyData[(int8_t) cBlockNumber].sMyString[MY_MAX_STR] = '\0'; /* Signal success */ iLen = encode_application_unsigned(&IOBufferPT[0], MY_ERR_OK); } } else { /* Signal bad index */ iLen = encode_application_unsigned(&IOBufferPT[0], MY_ERR_BAD_INDEX); } data->serviceParametersLen = iLen; data->serviceParameters = IOBufferPT; }