bacnet_stack/src/bacnet/lso.c

/*####COPYRIGHTBEGIN####
 -------------------------------------------
 Copyright (C) 2008 John Minack

 This program is free software; you can redistribute it and/or
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 This program is distributed in the hope that it will be useful,
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 GNU General Public License for more details.

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 The Free Software Foundation, Inc.
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 Boston, MA  02111-1307, USA.

 As a special exception, if other files instantiate templates or
 use macros or inline functions from this file, or you compile
 this file and link it with other works to produce a work based
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 work to be covered by the GNU General Public License. However
 the source code for this file must still be made available in
 accordance with section (3) of the GNU General Public License.

 This exception does not invalidate any other reasons why a work
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#include <stdint.h>
#include "bacnet/lso.h"
#include "bacnet/bacdcode.h"
#include "bacnet/apdu.h"

/** @file lso.c  BACnet Life Safety Operation encode/decode */

int lso_encode_apdu(uint8_t *apdu, uint8_t invoke_id, BACNET_LSO_DATA *data)
{
    int len = 0; /* length of each encoding */
    int apdu_len = 0; /* total length of the apdu, return value */

    if (apdu && data) {
        apdu[0] = PDU_TYPE_CONFIRMED_SERVICE_REQUEST;
        apdu[1] = encode_max_segs_max_apdu(0, MAX_APDU);
        apdu[2] = invoke_id;
        apdu[3] = SERVICE_CONFIRMED_LIFE_SAFETY_OPERATION;
        apdu_len = 4;
        /* tag 0 - requestingProcessId */
        len = encode_context_unsigned(&apdu[apdu_len], 0, data->processId);
        apdu_len += len;
        /* tag 1 - requestingSource */
        len = encode_context_character_string(
            &apdu[apdu_len], 1, &data->requestingSrc);
        apdu_len += len;
        /*
           Operation
         */
        len = encode_context_enumerated(&apdu[apdu_len], 2, data->operation);
        apdu_len += len;
        /*
           Object ID
         */

        len = encode_context_object_id(&apdu[apdu_len], 3,
            (int)data->targetObject.type, data->targetObject.instance);

        apdu_len += len;
    }

    return apdu_len;
}

int lso_decode_service_request(
    uint8_t *apdu, unsigned apdu_len, BACNET_LSO_DATA *data)
{
    int len = 0; /* return value */
    int section_length = 0; /* length returned from decoding */
    uint32_t operation = 0; /* handles decoded value */

    /* check for value pointers */
    if (apdu_len && data) {
        /* Tag 0: Object ID          */

        if ((section_length = decode_context_unsigned(
                 &apdu[len], 0, &data->processId)) == -1) {
            return -1;
        }
        len += section_length;

        if ((section_length = decode_context_character_string(
                 &apdu[len], 1, &data->requestingSrc)) == -1) {
            return -1;
        }
        len += section_length;

        if ((section_length = decode_context_enumerated(
                 &apdu[len], 2, &operation)) == -1) {
            return -1;
        }
        data->operation = (BACNET_LIFE_SAFETY_OPERATION)operation;
        len += section_length;

        /*
         ** This is an optional parameter, so dont fail if it doesnt exist
         */
        if (decode_is_context_tag(&apdu[len], 3)) {
            if ((section_length = decode_context_object_id(&apdu[len], 3,
                     &data->targetObject.type, &data->targetObject.instance)) ==
                -1) {
                return -1;
            }
            len += section_length;
        } else {
            data->targetObject.type = 0;
            data->targetObject.instance = 0;
        }
        return len;
    }

    return 0;
}

#ifdef TEST
#include <assert.h>
#include <string.h>
#include "ctest.h"
#include "bacnet/bacapp.h"

void testLSO(Test *pTest)
{
    uint8_t apdu[1000];
    int len;

    BACNET_LSO_DATA data;
    BACNET_LSO_DATA rxdata;

    memset(&rxdata, 0, sizeof(rxdata));

    characterstring_init_ansi(&data.requestingSrc, "foobar");
    data.operation = LIFE_SAFETY_OP_RESET;
    data.processId = 0x1234;
    data.targetObject.instance = 0x1000;
    data.targetObject.type = OBJECT_BINARY_INPUT;

    len = lso_encode_apdu(apdu, 100, &data);

    lso_decode_service_request(&apdu[4], len, &rxdata);

    ct_test(pTest, data.operation == rxdata.operation);
    ct_test(pTest, data.processId == rxdata.processId);
    ct_test(pTest, data.targetObject.instance == rxdata.targetObject.instance);
    ct_test(pTest, data.targetObject.type == rxdata.targetObject.type);
    ct_test(pTest,
        memcmp(data.requestingSrc.value, rxdata.requestingSrc.value,
            rxdata.requestingSrc.length) == 0);
}

#ifdef TEST_LSO
int main(int argc, char *argv[])
{
    Test *pTest;
    bool rc;

    pTest = ct_create("BACnet Life Safety Operation", NULL);
    /* individual tests */
    rc = ct_addTestFunction(pTest, testLSO);
    assert(rc);

    ct_setStream(pTest, stdout);
    ct_run(pTest);
    (void)ct_report(pTest);
    ct_destroy(pTest);

    return 0;
}
#endif /* TEST_COV */
#endif /* TEST */