jollen chen / WiflyInterface

Improve Wifly Interface

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Socket/UDPSocket.cpp@1:fb4494783863, 2012-08-24 (annotated)

Committer:
samux
Date:
Fri Aug 24 13:48:36 2012 +0000
Revision:
1:fb4494783863
Child:
4:0bcec6272784
first commit

Who changed what in which revision?

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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
samux 1:fb4494783863 24 UDPSocket::UDPSocket()
samux 1:fb4494783863 25 {
samux 1:fb4494783863 26 endpoint_configured = false;
samux 1:fb4494783863 27 endpoint_read = false;
samux 1:fb4494783863 28 }
samux 1:fb4494783863 29
samux 1:fb4494783863 30 int UDPSocket::init(void)
samux 1:fb4494783863 31 {
samux 1:fb4494783863 32 wifi->setProtocol(UDP);
samux 1:fb4494783863 33 wifi->exit();
samux 1:fb4494783863 34 return 0;
samux 1:fb4494783863 35 }
samux 1:fb4494783863 36
samux 1:fb4494783863 37 // Server initialization
samux 1:fb4494783863 38 int UDPSocket::bind(int port)
samux 1:fb4494783863 39 {
samux 1:fb4494783863 40 char cmd[17];
samux 1:fb4494783863 41
samux 1:fb4494783863 42 // set udp protocol
samux 1:fb4494783863 43 wifi->setProtocol(UDP);
samux 1:fb4494783863 44
samux 1:fb4494783863 45 // set local port
samux 1:fb4494783863 46 sprintf(cmd, "set i l %d\r", port);
samux 1:fb4494783863 47 if (!wifi->sendCommand(cmd, "AOK"))
samux 1:fb4494783863 48 return -1;
samux 1:fb4494783863 49 wifi->exit();
samux 1:fb4494783863 50 return 0;
samux 1:fb4494783863 51 }
samux 1:fb4494783863 52
samux 1:fb4494783863 53 // -1 if unsuccessful, else number of bytes written
samux 1:fb4494783863 54 int UDPSocket::sendTo(Endpoint &remote, char *packet, int length)
samux 1:fb4494783863 55 {
samux 1:fb4494783863 56 Timer tmr;
samux 1:fb4494783863 57 int idx = 0;
samux 1:fb4494783863 58
samux 1:fb4494783863 59 confEndpoint(remote);
samux 1:fb4494783863 60
samux 1:fb4494783863 61 tmr.start();
samux 1:fb4494783863 62
samux 1:fb4494783863 63 while ((tmr.read_ms() < _timeout) || _blocking) {
samux 1:fb4494783863 64
samux 1:fb4494783863 65 idx += wifi->send(packet, length);
samux 1:fb4494783863 66
samux 1:fb4494783863 67 if (idx == length)
samux 1:fb4494783863 68 return idx;
samux 1:fb4494783863 69 }
samux 1:fb4494783863 70 return (idx == 0) ? -1 : idx;
samux 1:fb4494783863 71 }
samux 1:fb4494783863 72
samux 1:fb4494783863 73 // -1 if unsuccessful, else number of bytes received
samux 1:fb4494783863 74 int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length)
samux 1:fb4494783863 75 {
samux 1:fb4494783863 76 Timer tmr;
samux 1:fb4494783863 77 int idx = 0;
samux 1:fb4494783863 78 int nb_available = 0;
samux 1:fb4494783863 79 int time = -1;
samux 1:fb4494783863 80
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 }
samux 1:fb4494783863 88 }
samux 1:fb4494783863 89
samux 1:fb4494783863 90 tmr.start();
samux 1:fb4494783863 91
samux 1:fb4494783863 92 while (time < _timeout) {
samux 1:fb4494783863 93
samux 1:fb4494783863 94 nb_available = wifi->readable();
samux 1:fb4494783863 95 for (int i = 0; i < min(nb_available, length); i++) {
samux 1:fb4494783863 96 buffer[idx] = wifi->getc();
samux 1:fb4494783863 97 idx++;
samux 1:fb4494783863 98 }
samux 1:fb4494783863 99
samux 1:fb4494783863 100 if (idx == length) {
samux 1:fb4494783863 101 break;
samux 1:fb4494783863 102 }
samux 1:fb4494783863 103
samux 1:fb4494783863 104 time = tmr.read_ms();
samux 1:fb4494783863 105 }
samux 1:fb4494783863 106
samux 1:fb4494783863 107 readEndpoint(remote);
samux 1:fb4494783863 108 return (idx == 0) ? -1 : idx;
samux 1:fb4494783863 109 }
samux 1:fb4494783863 110
samux 1:fb4494783863 111 bool UDPSocket::confEndpoint(Endpoint & ep)
samux 1:fb4494783863 112 {
samux 1:fb4494783863 113 char * host;
samux 1:fb4494783863 114 char cmd[30];
samux 1:fb4494783863 115 if (!endpoint_configured) {
samux 1:fb4494783863 116 host = ep.get_address();
samux 1:fb4494783863 117 if (host[0] != '\0') {
samux 1:fb4494783863 118 // set host
samux 1:fb4494783863 119 sprintf(cmd, "set i h %s\r", host);
samux 1:fb4494783863 120 if (!wifi->sendCommand(cmd, "AOK"))
samux 1:fb4494783863 121 return false;
samux 1:fb4494783863 122
samux 1:fb4494783863 123 // set remote port
samux 1:fb4494783863 124 sprintf(cmd, "set i r %d\r", ep.get_port());
samux 1:fb4494783863 125 if (!wifi->sendCommand(cmd, "AOK"))
samux 1:fb4494783863 126 return false;
samux 1:fb4494783863 127
samux 1:fb4494783863 128 wifi->exit();
samux 1:fb4494783863 129 endpoint_configured = true;
samux 1:fb4494783863 130 return true;
samux 1:fb4494783863 131 }
samux 1:fb4494783863 132 }
samux 1:fb4494783863 133 return true;
samux 1:fb4494783863 134 }
samux 1:fb4494783863 135
samux 1:fb4494783863 136 bool UDPSocket::readEndpoint(Endpoint & ep)
samux 1:fb4494783863 137 {
samux 1:fb4494783863 138 char recv[256];
samux 1:fb4494783863 139 int begin = 0;
samux 1:fb4494783863 140 int end = 0;
samux 1:fb4494783863 141 string str;
samux 1:fb4494783863 142 string addr;
samux 1:fb4494783863 143 int port;
samux 1:fb4494783863 144 if (!endpoint_read) {
samux 1:fb4494783863 145 if (!wifi->sendCommand("get ip\r", NULL, recv))
samux 1:fb4494783863 146 return false;
samux 1:fb4494783863 147 wifi->exit();
samux 1:fb4494783863 148 str = recv;
samux 1:fb4494783863 149 begin = str.find("HOST=");
samux 1:fb4494783863 150 end = str.find("PROTO=");
samux 1:fb4494783863 151 if (begin != string::npos && end != string::npos) {
samux 1:fb4494783863 152 str = str.substr(begin + 5, end - begin - 5);
samux 1:fb4494783863 153 int pos = str.find(":");
samux 1:fb4494783863 154 if (pos != string::npos) {
samux 1:fb4494783863 155 addr = str.substr(0, pos);
samux 1:fb4494783863 156 port = atoi(str.substr(pos + 1).c_str());
samux 1:fb4494783863 157 ep.set_address(addr.c_str(), port);
samux 1:fb4494783863 158 endpoint_read = true;
samux 1:fb4494783863 159 wifi->flush();
samux 1:fb4494783863 160 return true;
samux 1:fb4494783863 161 }
samux 1:fb4494783863 162 }
samux 1:fb4494783863 163 wifi->flush();
samux 1:fb4494783863 164 }
samux 1:fb4494783863 165 return false;
samux 1:fb4494783863 166 }