skarg
122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/*####COPYRIGHTBEGIN####
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-------------------------------------------
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Copyright (C) 2005 Steve Karg
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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The Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA.
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As a special exception, if other files instantiate templates or
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use macros or inline functions from this file, or you compile
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this file and link it with other works to produce a work based
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on this file, this file does not by itself cause the resulting
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work to be covered by the GNU General Public License. However
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the source code for this file must still be made available in
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accordance with section (3) of the GNU General Public License.
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This exception does not invalidate any other reasons why a work
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based on this file might be covered by the GNU General Public
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License.
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-------------------------------------------
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####COPYRIGHTEND####*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <assert.h>
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#include "bacdef.h"
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#include "bacenum.h"
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/* max-segments-accepted
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B'000' Unspecified number of segments accepted.
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B'001' 2 segments accepted.
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B'010' 4 segments accepted.
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B'011' 8 segments accepted.
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B'100' 16 segments accepted.
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B'101' 32 segments accepted.
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B'110' 64 segments accepted.
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B'111' Greater than 64 segments accepted.
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*/
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/* max-APDU-length-accepted
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B'0000' Up to MinimumMessageSize (50 octets)
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B'0001' Up to 128 octets
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B'0010' Up to 206 octets (fits in a LonTalk frame)
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B'0011' Up to 480 octets (fits in an ARCNET frame)
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B'0100' Up to 1024 octets
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B'0101' Up to 1476 octets (fits in an ISO 8802-3 frame)
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B'0110' reserved by ASHRAE
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B'0111' reserved by ASHRAE
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B'1000' reserved by ASHRAE
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B'1001' reserved by ASHRAE
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B'1010' reserved by ASHRAE
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B'1011' reserved by ASHRAE
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B'1100' reserved by ASHRAE
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B'1101' reserved by ASHRAE
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B'1110' reserved by ASHRAE
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B'1111' reserved by ASHRAE
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*/
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uint8_t npdu_encode_max_seg_max_apdu(int max_segs, int max_apdu)
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{
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uint8_t octet = 0;
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if (max_segs < 2)
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octet = 0;
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else if (max_segs < 4)
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octet = 0x10;
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else if (max_segs < 8)
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octet = 0x20;
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else if (max_segs < 16)
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octet = 0x30;
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else if (max_segs < 32)
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octet = 0x40;
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else if (max_segs < 64)
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octet = 0x50;
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else if (max_segs == 64)
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octet = 0x60;
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else
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octet = 0x70;
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// max_apdu must be 50 octets minimum
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assert(max_apdu >= 50);
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if (max_apdu == 50)
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octet |= 0x00;
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else if (max_apdu <= 128)
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octet |= 0x01;
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//fits in a LonTalk frame
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else if (max_apdu <= 206)
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octet |= 0x02;
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//fits in an ARCNET or MS/TP frame
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else if (max_apdu <= 480)
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octet |= 0x03;
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else if (max_apdu <= 1024)
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octet |= 0x04;
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// fits in an ISO 8802-3 frame
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else if (max_apdu <= 1476)
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octet |= 0x05;
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return octet;
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}
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int npdu_encode(
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uint8_t *buf,
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BACNET_ADDRESS *dest,
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BACNET_ADDRESS *src,
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bool data_expecting_reply,
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uint8_t invoke_id)
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{
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int len = 0;
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return len;
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}
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