Alexander Rao / ESP8266NodeMCUInterface

A fork of the original interface for OS/2. Features a correctly-implemented recv (but retains the old behavior via recv2).

Dependencies:   BufferedSerial

Dependents:   weather_clock weather_clock

Socket/UDPSocket.cpp@31:fd0eaf273b11, 2015-04-30 (annotated)

Committer:
mbedAustin
Date:
Thu Apr 30 04:53:21 2015 +0000
Revision:
31:fd0eaf273b11
Parent:
30:c035696b9397
Child:
34:7ccda5d68a00
Child:
37:6887e61cf674
safety commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:fb4494783863 1 /* Copyright (C) 2012 mbed.org, MIT License
samux 1:fb4494783863 2 *
samux 1:fb4494783863 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:fb4494783863 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
samux 1:fb4494783863 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
samux 1:fb4494783863 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
samux 1:fb4494783863 7 * furnished to do so, subject to the following conditions:
samux 1:fb4494783863 8 *
samux 1:fb4494783863 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:fb4494783863 10 * substantial portions of the Software.
samux 1:fb4494783863 11 *
samux 1:fb4494783863 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:fb4494783863 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:fb4494783863 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:fb4494783863 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:fb4494783863 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:fb4494783863 17 */
samux 1:fb4494783863 18
samux 1:fb4494783863 19 #include "UDPSocket.h"
samux 1:fb4494783863 20
samux 1:fb4494783863 21 #include <string>
samux 1:fb4494783863 22 #include <algorithm>
samux 1:fb4494783863 23
michaeljkoster 12:c5f0eac67a8a 24 extern Serial pc;
michaeljkoster 12:c5f0eac67a8a 25
samux 1:fb4494783863 26 UDPSocket::UDPSocket()
samux 1:fb4494783863 27 {
samux 1:fb4494783863 28 endpoint_configured = false;
samux 1:fb4494783863 29 endpoint_read = false;
michaeljkoster 19:fb8d5bff2076 30 Endpoint currentEndpoint;
samux 1:fb4494783863 31 }
samux 1:fb4494783863 32
samux 1:fb4494783863 33 int UDPSocket::init(void)
samux 1:fb4494783863 34 {
samux 1:fb4494783863 35 return 0;
samux 1:fb4494783863 36 }
samux 1:fb4494783863 37
samux 1:fb4494783863 38 // Server initialization
samux 1:fb4494783863 39 int UDPSocket::bind(int port)
samux 1:fb4494783863 40 {
samux 1:fb4494783863 41 return 0;
samux 1:fb4494783863 42 }
samux 1:fb4494783863 43
samux 1:fb4494783863 44 // -1 if unsuccessful, else number of bytes written
samux 1:fb4494783863 45 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length)
samux 1:fb4494783863 46 {
samux 1:fb4494783863 47 Timer tmr;
samux 1:fb4494783863 48 int idx = 0;
samux 1:fb4494783863 49
samux 1:fb4494783863 50 confEndpoint(remote);
samux 1:fb4494783863 51
samux 1:fb4494783863 52 tmr.start();
samux 1:fb4494783863 53
samux 1:fb4494783863 54 while ((tmr.read_ms() < _timeout) || _blocking) {
samux 1:fb4494783863 55
mbedAustin 31:fd0eaf273b11 56 idx += wifi->send(packet, length);
samux 1:fb4494783863 57
samux 1:fb4494783863 58 if (idx == length)
samux 1:fb4494783863 59 return idx;
samux 1:fb4494783863 60 }
samux 1:fb4494783863 61 return (idx == 0) ? -1 : idx;
samux 1:fb4494783863 62 }
samux 1:fb4494783863 63
samux 1:fb4494783863 64 // -1 if unsuccessful, else number of bytes received
samux 1:fb4494783863 65 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length)
samux 1:fb4494783863 66 {
samux 1:fb4494783863 67 Timer tmr;
samux 1:fb4494783863 68 int idx = 0;
samux 1:fb4494783863 69 int nb_available = 0;
samux 1:fb4494783863 70 int time = -1;
michaeljkoster 27:9c6cefc12f0c 71
michaeljkoster 27:9c6cefc12f0c 72 //make this the non-blocking case and return if <= 0
michaeljkoster 27:9c6cefc12f0c 73 // remember to change the config to blocking
michaeljkoster 27:9c6cefc12f0c 74 // if ( ! _blocking) {
michaeljkoster 27:9c6cefc12f0c 75 // if ( wifi.readable <= 0 ) {
michaeljkoster 27:9c6cefc12f0c 76 // return (wifi.readable);
michaeljkoster 27:9c6cefc12f0c 77 // }
michaeljkoster 27:9c6cefc12f0c 78 // }
michaeljkoster 27:9c6cefc12f0c 79 //---
michaeljkoster 22:c4360e61486a 80 tmr.start();
samux 1:fb4494783863 81 if (_blocking) {
samux 1:fb4494783863 82 while (1) {
samux 1:fb4494783863 83 nb_available = wifi->readable();
samux 1:fb4494783863 84 if (nb_available != 0) {
samux 1:fb4494783863 85 break;
samux 1:fb4494783863 86 }
samux 1:fb4494783863 87 }
michaeljkoster 21:690526f05fe6 88 }
michaeljkoster 27:9c6cefc12f0c 89 //---
michaeljkoster 27:9c6cefc12f0c 90 // blocking case
michaeljkoster 21:690526f05fe6 91 else {
michaeljkoster 22:c4360e61486a 92 tmr.reset();
michaeljkoster 21:690526f05fe6 93
michaeljkoster 21:690526f05fe6 94 while (time < _timeout){
michaeljkoster 21:690526f05fe6 95 nb_available = wifi->readable();
michaeljkoster 21:690526f05fe6 96 if (nb_available < 0) return nb_available;
michaeljkoster 21:690526f05fe6 97 if (nb_available > 0) break ;
michaeljkoster 21:690526f05fe6 98 time = tmr.read_ms();
michaeljkoster 21:690526f05fe6 99 }
michaeljkoster 21:690526f05fe6 100
michaeljkoster 21:690526f05fe6 101 if (nb_available == 0) return nb_available;
michaeljkoster 21:690526f05fe6 102 }
michaeljkoster 21:690526f05fe6 103
michaeljkoster 27:9c6cefc12f0c 104 // change this to < 20 mS timeout per byte to detect end of packet gap
michaeljkoster 27:9c6cefc12f0c 105 // this may not work due to buffering at the UART interface
michaeljkoster 22:c4360e61486a 106 tmr.reset();
michaeljkoster 27:9c6cefc12f0c 107 // while ( tmr.read_ms() < 20 ) {
michaeljkoster 27:9c6cefc12f0c 108 // if ( wifi.readable() && (idx < length) ) {
michaeljkoster 27:9c6cefc12f0c 109 // buffer[idx++] = wifi->getc();
michaeljkoster 27:9c6cefc12f0c 110 // tmr.reset();
michaeljkoster 27:9c6cefc12f0c 111 // }
michaeljkoster 27:9c6cefc12f0c 112 // if ( idx == length ) {
michaeljkoster 27:9c6cefc12f0c 113 // break;
michaeljkoster 27:9c6cefc12f0c 114 // }
michaeljkoster 27:9c6cefc12f0c 115 // }
michaeljkoster 27:9c6cefc12f0c 116 //---
samux 1:fb4494783863 117 while (time < _timeout) {
samux 1:fb4494783863 118
samux 1:fb4494783863 119 nb_available = wifi->readable();
michaeljkoster 23:de9221771e96 120 //for (int i = 0; i < min(nb_available, length); i++) {
michaeljkoster 23:de9221771e96 121 for (int i = 0; i < min(nb_available, (length-idx)); i++) {
samux 1:fb4494783863 122 buffer[idx] = wifi->getc();
samux 1:fb4494783863 123 idx++;
samux 1:fb4494783863 124 }
samux 1:fb4494783863 125 if (idx == length) {
samux 1:fb4494783863 126 break;
samux 1:fb4494783863 127 }
samux 1:fb4494783863 128 time = tmr.read_ms();
samux 1:fb4494783863 129 }
michaeljkoster 27:9c6cefc12f0c 130 //---
samux 1:fb4494783863 131 readEndpoint(remote);
samux 1:fb4494783863 132 return (idx == 0) ? -1 : idx;
samux 1:fb4494783863 133 }
samux 1:fb4494783863 134
samux 1:fb4494783863 135 bool UDPSocket::confEndpoint(Endpoint & ep)
samux 1:fb4494783863 136 {
michaeljkoster 19:fb8d5bff2076 137 currentEndpoint = ep;
samux 1:fb4494783863 138 return true;
samux 1:fb4494783863 139 }
samux 1:fb4494783863 140
samux 1:fb4494783863 141 bool UDPSocket::readEndpoint(Endpoint & ep)
samux 1:fb4494783863 142 {
michaeljkoster 19:fb8d5bff2076 143 ep = currentEndpoint;
michaeljkoster 16:3f0efaa57a12 144 return true;
samux 1:fb4494783863 145 }