Junichi Katsu / Mbed 2 deprecated MilkcocoaSampleESP8266_LED

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Dependencies:   Milkcocoa mbed

Fork of MilkcocoaSampleESP8266 by Junichi Katsu

ESP8266InterfaceTiny/Socket/UDPSocket.cpp@2:d2e4e7ce7a65, 2016-02-27 (annotated)

Committer:
jksoft
Date:
Sat Feb 27 00:12:32 2016 +0000
Revision:
2:d2e4e7ce7a65
Parent:
0:82d5445a9461 
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Who changed what in which revision?

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jksoft 0:82d5445a9461 1 /* Copyright (C) 2012 mbed.org, MIT License
jksoft 0:82d5445a9461 2 *
jksoft 0:82d5445a9461 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
jksoft 0:82d5445a9461 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
jksoft 0:82d5445a9461 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
jksoft 0:82d5445a9461 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
jksoft 0:82d5445a9461 7 * furnished to do so, subject to the following conditions:
jksoft 0:82d5445a9461 8 *
jksoft 0:82d5445a9461 9 * The above copyright notice and this permission notice shall be included in all copies or
jksoft 0:82d5445a9461 10 * substantial portions of the Software.
jksoft 0:82d5445a9461 11 *
jksoft 0:82d5445a9461 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
jksoft 0:82d5445a9461 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
jksoft 0:82d5445a9461 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
jksoft 0:82d5445a9461 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jksoft 0:82d5445a9461 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
jksoft 0:82d5445a9461 17 */
jksoft 0:82d5445a9461 18
jksoft 0:82d5445a9461 19 #include "UDPSocket.h"
jksoft 0:82d5445a9461 20
jksoft 0:82d5445a9461 21 #include <string>
jksoft 0:82d5445a9461 22 #include <algorithm>
jksoft 0:82d5445a9461 23
jksoft 0:82d5445a9461 24 UDPSocket::UDPSocket()
jksoft 0:82d5445a9461 25 {
jksoft 0:82d5445a9461 26 endpoint_configured = false;
jksoft 0:82d5445a9461 27 endpoint_read = false;
jksoft 0:82d5445a9461 28 Endpoint currentEndpoint;
jksoft 0:82d5445a9461 29 }
jksoft 0:82d5445a9461 30
jksoft 0:82d5445a9461 31 int UDPSocket::init(void)
jksoft 0:82d5445a9461 32 {
jksoft 0:82d5445a9461 33 return 0;
jksoft 0:82d5445a9461 34 }
jksoft 0:82d5445a9461 35
jksoft 0:82d5445a9461 36 // Server initialization
jksoft 0:82d5445a9461 37 int UDPSocket::bind(int port)
jksoft 0:82d5445a9461 38 {
jksoft 0:82d5445a9461 39 return 0;
jksoft 0:82d5445a9461 40 }
jksoft 0:82d5445a9461 41
jksoft 0:82d5445a9461 42 // -1 if unsuccessful, else number of bytes written
jksoft 0:82d5445a9461 43 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length)
jksoft 0:82d5445a9461 44 {
jksoft 0:82d5445a9461 45 Timer tmr;
jksoft 0:82d5445a9461 46 int idx = 0;
jksoft 0:82d5445a9461 47
jksoft 0:82d5445a9461 48
jksoft 0:82d5445a9461 49 confEndpoint(remote);
jksoft 0:82d5445a9461 50
jksoft 0:82d5445a9461 51 // initialize transparent mode if not already done
jksoft 0:82d5445a9461 52 if(!endpoint_configured) {
jksoft 0:82d5445a9461 53 // initialize UDP (default id of -1 means transparent mode)
jksoft 0:82d5445a9461 54 //!wifi->start(ESP_UDP_TYPE, remote._ipAddress, remote._port, remote._id
jksoft 0:82d5445a9461 55 if(!wifi->startUDP(remote._ipAddress, remote._port, 0,length)) {
jksoft 0:82d5445a9461 56 return(-1);
jksoft 0:82d5445a9461 57 }
jksoft 0:82d5445a9461 58 endpoint_configured = true;
jksoft 0:82d5445a9461 59 }
jksoft 0:82d5445a9461 60
jksoft 0:82d5445a9461 61 tmr.start();
jksoft 0:82d5445a9461 62
jksoft 0:82d5445a9461 63 while ((tmr.read_ms() < _timeout) || _blocking) {
jksoft 0:82d5445a9461 64
jksoft 0:82d5445a9461 65 idx += wifi->send(packet, length);
jksoft 0:82d5445a9461 66
jksoft 0:82d5445a9461 67 if (idx == length)
jksoft 0:82d5445a9461 68 return idx;
jksoft 0:82d5445a9461 69 }
jksoft 0:82d5445a9461 70 return (idx == 0) ? -1 : idx;
jksoft 0:82d5445a9461 71 }
jksoft 0:82d5445a9461 72
jksoft 0:82d5445a9461 73 // -1 if unsuccessful, else number of bytes received
jksoft 0:82d5445a9461 74 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length)
jksoft 0:82d5445a9461 75 {
jksoft 0:82d5445a9461 76 Timer tmr;
jksoft 0:82d5445a9461 77 int idx = 0;
jksoft 0:82d5445a9461 78 int nb_available = 0;
jksoft 0:82d5445a9461 79 int time = -1;
jksoft 0:82d5445a9461 80
jksoft 0:82d5445a9461 81 //make this the non-blocking case and return if <= 0
jksoft 0:82d5445a9461 82 // remember to change the config to blocking
jksoft 0:82d5445a9461 83 // if ( ! _blocking) {
jksoft 0:82d5445a9461 84 // if ( wifi.readable <= 0 ) {
jksoft 0:82d5445a9461 85 // return (wifi.readable);
jksoft 0:82d5445a9461 86 // }
jksoft 0:82d5445a9461 87 // }
jksoft 0:82d5445a9461 88 //---
jksoft 0:82d5445a9461 89 tmr.start();
jksoft 0:82d5445a9461 90 if (_blocking) {
jksoft 0:82d5445a9461 91 while (1) {
jksoft 0:82d5445a9461 92 nb_available = wifi->readable();
jksoft 0:82d5445a9461 93 if (nb_available != 0) {
jksoft 0:82d5445a9461 94 break;
jksoft 0:82d5445a9461 95 }
jksoft 0:82d5445a9461 96 }
jksoft 0:82d5445a9461 97 }
jksoft 0:82d5445a9461 98 //---
jksoft 0:82d5445a9461 99 // blocking case
jksoft 0:82d5445a9461 100 else {
jksoft 0:82d5445a9461 101 tmr.reset();
jksoft 0:82d5445a9461 102
jksoft 0:82d5445a9461 103 while (time < _timeout) {
jksoft 0:82d5445a9461 104 nb_available = wifi->readable();
jksoft 0:82d5445a9461 105 if (nb_available < 0) return nb_available;
jksoft 0:82d5445a9461 106 if (nb_available > 0) break ;
jksoft 0:82d5445a9461 107 time = tmr.read_ms();
jksoft 0:82d5445a9461 108 }
jksoft 0:82d5445a9461 109
jksoft 0:82d5445a9461 110 if (nb_available == 0) return nb_available;
jksoft 0:82d5445a9461 111 }
jksoft 0:82d5445a9461 112
jksoft 0:82d5445a9461 113 // change this to < 20 mS timeout per byte to detect end of packet gap
jksoft 0:82d5445a9461 114 // this may not work due to buffering at the UART interface
jksoft 0:82d5445a9461 115 tmr.reset();
jksoft 0:82d5445a9461 116 // while ( tmr.read_ms() < 20 ) {
jksoft 0:82d5445a9461 117 // if ( wifi.readable() && (idx < length) ) {
jksoft 0:82d5445a9461 118 // buffer[idx++] = wifi->getc();
jksoft 0:82d5445a9461 119 // tmr.reset();
jksoft 0:82d5445a9461 120 // }
jksoft 0:82d5445a9461 121 // if ( idx == length ) {
jksoft 0:82d5445a9461 122 // break;
jksoft 0:82d5445a9461 123 // }
jksoft 0:82d5445a9461 124 // }
jksoft 0:82d5445a9461 125 //---
jksoft 0:82d5445a9461 126 while (time < _timeout) {
jksoft 0:82d5445a9461 127
jksoft 0:82d5445a9461 128 nb_available = wifi->readable();
jksoft 0:82d5445a9461 129 //for (int i = 0; i < min(nb_available, length); i++) {
jksoft 0:82d5445a9461 130 for (int i = 0; i < min(nb_available, (length-idx)); i++) {
jksoft 0:82d5445a9461 131 buffer[idx] = wifi->getc();
jksoft 0:82d5445a9461 132 idx++;
jksoft 0:82d5445a9461 133 }
jksoft 0:82d5445a9461 134 if (idx == length) {
jksoft 0:82d5445a9461 135 break;
jksoft 0:82d5445a9461 136 }
jksoft 0:82d5445a9461 137 time = tmr.read_ms();
jksoft 0:82d5445a9461 138 }
jksoft 0:82d5445a9461 139 //---
jksoft 0:82d5445a9461 140 readEndpoint(remote);
jksoft 0:82d5445a9461 141 return (idx == 0) ? -1 : idx;
jksoft 0:82d5445a9461 142 }
jksoft 0:82d5445a9461 143
jksoft 0:82d5445a9461 144 bool UDPSocket::confEndpoint(Endpoint & ep)
jksoft 0:82d5445a9461 145 {
jksoft 0:82d5445a9461 146 currentEndpoint = ep;
jksoft 0:82d5445a9461 147 return true;
jksoft 0:82d5445a9461 148 }
jksoft 0:82d5445a9461 149
jksoft 0:82d5445a9461 150 bool UDPSocket::readEndpoint(Endpoint & ep)
jksoft 0:82d5445a9461 151 {
jksoft 0:82d5445a9461 152 ep = currentEndpoint;
jksoft 0:82d5445a9461 153 return true;
jksoft 0:82d5445a9461 154 }