Jan Korycan / WNCInterface

WNCInterface

Dependencies:   WncControllerK64F

Fork of WNCInterface by Avnet

Socket/UDPSocket.cpp@9:9f0578ff157a, 2016-10-07 (annotated)

Committer:
JMF
Date:
Fri Oct 07 13:26:00 2016 +0000
Revision:
9:9f0578ff157a
Parent:
1:e511ea8d39d5
Child:
18:198e9b0acf11
Cleaned up WNC Error checking to ensure mutex was released when an error occurs.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JMF 1:e511ea8d39d5 1 /* =====================================================================
JMF 1:e511ea8d39d5 2 Copyright © 2016, Avnet (R)
JMF 1:e511ea8d39d5 3
JMF 1:e511ea8d39d5 4 Contributors:
JMF 1:e511ea8d39d5 5 * James M Flynn, www.em.avnet.com
JMF 1:e511ea8d39d5 6
JMF 1:e511ea8d39d5 7 Licensed under the Apache License, Version 2.0 (the "License");
JMF 1:e511ea8d39d5 8 you may not use this file except in compliance with the License.
JMF 1:e511ea8d39d5 9 You may obtain a copy of the License at
JMF 1:e511ea8d39d5 10
JMF 1:e511ea8d39d5 11 http://www.apache.org/licenses/LICENSE-2.0
JMF 1:e511ea8d39d5 12
JMF 1:e511ea8d39d5 13 Unless required by applicable law or agreed to in writing,
JMF 1:e511ea8d39d5 14 software distributed under the License is distributed on an
JMF 1:e511ea8d39d5 15 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
JMF 1:e511ea8d39d5 16 either express or implied. See the License for the specific
JMF 1:e511ea8d39d5 17 language governing permissions and limitations under the License.
JMF 1:e511ea8d39d5 18
JMF 1:e511ea8d39d5 19 @file WNCInterface.cpp
JMF 1:e511ea8d39d5 20 @version 1.0
JMF 1:e511ea8d39d5 21 @date Sept 2016
JMF 1:e511ea8d39d5 22
JMF 1:e511ea8d39d5 23 ======================================================================== */
JMF 1:e511ea8d39d5 24
JMF 1:e511ea8d39d5 25 #include "../WNCInterface.h"
JMF 1:e511ea8d39d5 26
JMF 1:e511ea8d39d5 27 #include "UDPSocket.h"
JMF 1:e511ea8d39d5 28 #include <cstring>
JMF 1:e511ea8d39d5 29
JMF 1:e511ea8d39d5 30 UDPSocket::UDPSocket() :
JMF 1:e511ea8d39d5 31 _is_blocking(0),
JMF 1:e511ea8d39d5 32 _btimeout(0){
JMF 1:e511ea8d39d5 33 }
JMF 1:e511ea8d39d5 34
JMF 1:e511ea8d39d5 35 UDPSocket::~UDPSocket() {
JMF 1:e511ea8d39d5 36 }
JMF 1:e511ea8d39d5 37
JMF 1:e511ea8d39d5 38 int UDPSocket::init(void) {
JMF 1:e511ea8d39d5 39 _is_blocking = false; // start out not blocking, user will set it if desired
JMF 1:e511ea8d39d5 40 return ( WNCInterface::_pwnc->getWncStatus() == WNC_GOOD )? 0:-1;
JMF 1:e511ea8d39d5 41 }
JMF 1:e511ea8d39d5 42
JMF 1:e511ea8d39d5 43
JMF 1:e511ea8d39d5 44 int UDPSocket::close(void) {
JMF 1:e511ea8d39d5 45 Socket::disconnect();
JMF 1:e511ea8d39d5 46 return ( WNCInterface::_pwnc->getWncStatus() == WNC_GOOD )? 0:-1;
JMF 1:e511ea8d39d5 47 }
JMF 1:e511ea8d39d5 48
JMF 1:e511ea8d39d5 49 // -1 if unsuccessful, else number of bytes written
JMF 1:e511ea8d39d5 50 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length) {
JMF 1:e511ea8d39d5 51 int ret = -1;
JMF 1:e511ea8d39d5 52
JMF 9:9f0578ff157a 53 CHK_WNCFE(( WNCInterface::_pwnc->getWncStatus() == FATAL_FLAG ), fail);
JMF 1:e511ea8d39d5 54 if( remote._epAddr.port ) { //make sure the Endpoint has an port assoicated with it
JMF 1:e511ea8d39d5 55 if( Socket::connect(remote._epAddr.IP,SOCK_DGRAM,remote._epAddr.port) ) {
JMF 1:e511ea8d39d5 56 if( WNCInterface::_pwnc->write(0,packet,length) )
JMF 1:e511ea8d39d5 57 ret = length;
JMF 1:e511ea8d39d5 58 close();
JMF 1:e511ea8d39d5 59 }
JMF 1:e511ea8d39d5 60 }
JMF 1:e511ea8d39d5 61 return ret;
JMF 1:e511ea8d39d5 62 }
JMF 1:e511ea8d39d5 63
JMF 1:e511ea8d39d5 64 //
JMF 1:e511ea8d39d5 65 // blocking is used to make the WNC keep checking for incoming data for a
JMF 1:e511ea8d39d5 66 // period of time.
JMF 1:e511ea8d39d5 67
JMF 1:e511ea8d39d5 68 void UDPSocket::set_blocking (bool blocking, unsigned int timeout) {
JMF 1:e511ea8d39d5 69 _is_blocking = blocking; // true or false
JMF 1:e511ea8d39d5 70 _btimeout = timeout; // user specifies in msec
JMF 1:e511ea8d39d5 71
JMF 9:9f0578ff157a 72 CHK_WNCFE(( WNCInterface::_pwnc->getWncStatus() == FATAL_FLAG ), void);
JMF 1:e511ea8d39d5 73 WNCInterface::_pwnc->setReadRetryWait(0, 0);
JMF 1:e511ea8d39d5 74 WNCInterface::_pwnc->setReadRetries(0, 0);
JMF 1:e511ea8d39d5 75 }
JMF 1:e511ea8d39d5 76
JMF 1:e511ea8d39d5 77 // -1 if unsuccessful, else number of bytes received
JMF 1:e511ea8d39d5 78 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length) {
JMF 1:e511ea8d39d5 79 const uint8_t *ptr;
JMF 1:e511ea8d39d5 80 Timer t;
JMF 1:e511ea8d39d5 81 int done, ret = -1;
JMF 1:e511ea8d39d5 82
JMF 1:e511ea8d39d5 83 //make sure the Endpoint has an port assoicated with it
JMF 1:e511ea8d39d5 84 if( !remote._epAddr.port )
JMF 1:e511ea8d39d5 85 return -1;
JMF 1:e511ea8d39d5 86
JMF 9:9f0578ff157a 87 CHK_WNCFE(( WNCInterface::_pwnc->getWncStatus() == FATAL_FLAG ), fail);
JMF 1:e511ea8d39d5 88 ret = Socket::connect(remote._epAddr.IP,SOCK_DGRAM,remote._epAddr.port);
JMF 1:e511ea8d39d5 89
JMF 1:e511ea8d39d5 90 t.start();
JMF 1:e511ea8d39d5 91 do {
JMF 1:e511ea8d39d5 92 ret = WNCInterface::_pwnc->read(0, &ptr);
JMF 1:e511ea8d39d5 93 done = ret | (t.read_ms() > _btimeout);
JMF 1:e511ea8d39d5 94 }
JMF 1:e511ea8d39d5 95 while( _is_blocking && !done );
JMF 1:e511ea8d39d5 96 t.stop();
JMF 1:e511ea8d39d5 97
JMF 1:e511ea8d39d5 98 if( ret > length )
JMF 1:e511ea8d39d5 99 ret = length;
JMF 1:e511ea8d39d5 100 memcpy( buffer, ptr, ret );
JMF 1:e511ea8d39d5 101
JMF 1:e511ea8d39d5 102 return ret;
JMF 1:e511ea8d39d5 103 }
JMF 1:e511ea8d39d5 104
JMF 1:e511ea8d39d5 105