Avnet / WNCInterface

The WDCInterface is is a drop-in replacement for an EthernetInterface class that allows the user to connect to the Internet with a Wistron NeWeb Corporation (WNC) M14A2A Series data module using the standard network Socket API's. This interface class is used in the AT&T Cellular IoT Starter Kit which is sold by Avnet (http://cloudconnectkits.org/product/att-cellular-iot-starter-kit).

Dependencies:   WncControllerK64F

Dependents:   WNCProximityMqtt Pubnub_ATT_IoT_SK_WNC_sync BluemixDemo BluemixQS ... more

See the WNCInterface README in the Wiki tab for detailed information on this library.

Socket/WncUDPSocket.cpp@26:81e520908460, 2017-03-24 (annotated)

Committer:
JMF
Date:
Fri Mar 24 21:43:57 2017 +0000
Revision:
26:81e520908460
Parent:
Socket/UDPSocket.cpp@25:52bad4105cac
Child:
27:2dc9461c04dc
Changing WNC Networking Class names to be prefixed with "Wnc" so they don't collide with the standard networking classes.

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 26:81e520908460 27 #include "WncUDPSocket.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 25:52bad4105cac 56 if( WNCInterface::_pwnc->write(0,(const uint8_t*)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