diff --git a/bacnet-stack/whois.c b/bacnet-stack/whois.c new file mode 100644 index 00000000..ddebc47a --- /dev/null +++ b/bacnet-stack/whois.c @@ -0,0 +1,193 @@ +/*####COPYRIGHTBEGIN#### + ------------------------------------------- + Copyright (C) 2005 Steve Karg + + 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. + 59 Temple Place - Suite 330 + 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 + on this file, this file does not by itself cause the resulting + 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 + based on this file might be covered by the GNU General Public + License. + ------------------------------------------- +####COPYRIGHTEND####*/ +#include +#include "bacenum.h" +#include "bacdcode.h" +#include "bacdef.h" + +// encode I-Am service - use -1 for limit if you want unlimited +int whois_encode_apdu( + uint8_t *apdu, + int32_t low_limit, + int32_t high_limit) +{ + int len = 0; // length of each encoding + int apdu_len = 0; // total length of the apdu, return value + + if (apdu) { + apdu[0] = PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST; + apdu[1] = SERVICE_UNCONFIRMED_WHO_IS; // service choice + apdu_len = 2; + // optional limits - must be used as a pair + if ((low_limit >= 0) && (low_limit <= BACNET_MAX_INSTANCE) && + (high_limit >= 0) && (high_limit <= BACNET_MAX_INSTANCE)) + { + len = encode_tagged_unsigned( + &apdu[apdu_len], + low_limit); + apdu_len += len; + len = encode_tagged_unsigned( + &apdu[apdu_len], + high_limit); + apdu_len += len; + } + } + + return apdu_len; +} + +int whois_decode_apdu( + uint8_t *apdu, + unsigned apdu_len, + int32_t *pLow_limit, + int32_t *pHigh_limit) +{ + int len = 0; + uint8_t tag_number = 0; + uint32_t len_value = 0; + unsigned int decoded_value = 0; + + if (!apdu) + return -1; + // optional checking - most likely was already done prior to this call + if (apdu[0] != PDU_TYPE_UNCONFIRMED_SERVICE_REQUEST) + return -1; + if (apdu[1] != SERVICE_UNCONFIRMED_WHO_IS) + return -1; + // optional limits - must be used as a pair + if (apdu_len > 2) + { + len = 2; + len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); + if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) + return -1; + len += decode_unsigned(&apdu[len], len_value, &decoded_value); + if ((decoded_value >= 0) && (decoded_value <= BACNET_MAX_INSTANCE)) + { + if (pLow_limit) + *pLow_limit = decoded_value; + } + len += decode_tag_number_and_value(&apdu[len], &tag_number, &len_value); + if (tag_number != BACNET_APPLICATION_TAG_UNSIGNED_INT) + return -1; + len += decode_unsigned(&apdu[len], len_value, &decoded_value); + if ((decoded_value >= 0) && (decoded_value <= BACNET_MAX_INSTANCE)) + { + if (pHigh_limit) + *pHigh_limit = decoded_value; + } + } + + return len; +} + +#ifdef TEST +#include +#include +#include "ctest.h" + +void testWhoIs(Test * pTest) +{ + uint8_t apdu[480] = {0}; + int len = 0; + int apdu_len = 0; + int32_t low_limit = -1; + int32_t high_limit = -1; + int32_t test_low_limit = -1; + int32_t test_high_limit = -1; + + len = whois_encode_apdu( + &apdu[0], + low_limit, + high_limit); + ct_test(pTest, len != 0); + apdu_len = len; + + len = whois_decode_apdu( + &apdu[0], + apdu_len, + &test_low_limit, + &test_high_limit); + ct_test(pTest, len != -1); + ct_test(pTest, test_low_limit == low_limit); + ct_test(pTest, test_high_limit == high_limit); + + for ( + low_limit = 0; + low_limit <= BACNET_MAX_INSTANCE; + low_limit += (BACNET_MAX_INSTANCE/4)) + { + for ( + high_limit = 0; + high_limit <= BACNET_MAX_INSTANCE; + high_limit += (BACNET_MAX_INSTANCE/4)) + { + len = whois_encode_apdu( + &apdu[0], + low_limit, + high_limit); + apdu_len = len; + ct_test(pTest, len != 0); + len = whois_decode_apdu( + &apdu[0], + apdu_len, + &test_low_limit, + &test_high_limit); + ct_test(pTest, len != -1); + ct_test(pTest, test_low_limit == low_limit); + ct_test(pTest, test_high_limit == high_limit); + } + } +} + +#ifdef TEST_WHOIS +int main(void) +{ + Test *pTest; + bool rc; + + pTest = ct_create("BACnet Who-Is", NULL); + /* individual tests */ + rc = ct_addTestFunction(pTest, testWhoIs); + assert(rc); + + ct_setStream(pTest, stdout); + ct_run(pTest); + (void) ct_report(pTest); + ct_destroy(pTest); + + return 0; +} +#endif /* TEST_WHOIS */ +#endif /* TEST */ diff --git a/bacnet-stack/whois.h b/bacnet-stack/whois.h new file mode 100644 index 00000000..875b65d2 --- /dev/null +++ b/bacnet-stack/whois.h @@ -0,0 +1,56 @@ +/*####COPYRIGHTBEGIN#### + ------------------------------------------- + Copyright (C) 2004 Steve Karg + + 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. + 59 Temple Place - Suite 330 + 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 + on this file, this file does not by itself cause the resulting + 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 + based on this file might be covered by the GNU General Public + License. + ------------------------------------------- +####COPYRIGHTEND####*/ +#ifndef WHOIS_H +#define WHOIS_H + +#include +#include + +// encode I-Am service - use -1 for limit if you want unlimited +int whois_encode_apdu( + uint8_t *apdu, + int32_t low_limit, + int32_t high_limit); + +int whois_decode_apdu( + uint8_t *apdu, + unsigned apdu_len, + int32_t *pLow_limit, + int32_t *pHigh_limit); + +#ifdef TEST +void testWhoIs(Test * pTest); +#endif + +#endif \ No newline at end of file diff --git a/bacnet-stack/whois.mak b/bacnet-stack/whois.mak new file mode 100644 index 00000000..856b30de --- /dev/null +++ b/bacnet-stack/whois.mak @@ -0,0 +1,33 @@ +#Makefile to build test case +CC = gcc +BASEDIR = . +#CFLAGS = -Wall -I. +# -g for debugging with gdb +#CFLAGS = -Wall -I. -g +CFLAGS = -Wall -I. -Itest -DTEST -DTEST_WHOIS -g + +SRCS = bacdcode.c \ + bigend.c \ + whois.c \ + test/ctest.c + +OBJS = ${SRCS:.c=.o} + +TARGET = whois + +all: ${TARGET} + +${TARGET}: ${OBJS} + ${CC} -o $@ ${OBJS} + +.c.o: + ${CC} -c ${CFLAGS} $*.c -o $@ + +depend: + rm -f .depend + ${CC} -MM ${CFLAGS} *.c >> .depend + +clean: + rm -rf core ${TARGET} $(OBJS) *.bak *.1 *.ini + +include: .depend