File size: 3,842 Bytes
69c3cbe | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | /*
WiFiUdp.cpp - Library for Arduino Wifi shield.
Copyright (c) 2011-2014 Arduino LLC. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
extern "C" {
#include "utility/debug.h"
#include "utility/wifi_spi.h"
}
#include <string.h>
#include "utility/server_drv.h"
#include "utility/wifi_drv.h"
#include "WiFi.h"
#include "WiFiUdp.h"
#include "WiFiClient.h"
#include "WiFiServer.h"
/* Constructor */
WiFiUDP::WiFiUDP() : _sock(NO_SOCKET_AVAIL) {}
/* Start WiFiUDP socket, listening at local port PORT */
uint8_t WiFiUDP::begin(uint16_t port) {
uint8_t sock = WiFiClass::getSocket();
if (sock != NO_SOCKET_AVAIL)
{
ServerDrv::startServer(port, sock, UDP_MODE);
WiFiClass::_server_port[sock] = port;
_sock = sock;
_port = port;
return 1;
}
return 0;
}
/* return number of bytes available in the current packet,
will return zero if parsePacket hasn't been called yet */
int WiFiUDP::available() {
if (_sock != NO_SOCKET_AVAIL)
{
return ServerDrv::availData(_sock);
}
return 0;
}
/* Release any resources being used by this WiFiUDP instance */
void WiFiUDP::stop()
{
if (_sock == NO_SOCKET_AVAIL)
return;
ServerDrv::stopClient(_sock);
_sock = NO_SOCKET_AVAIL;
}
int WiFiUDP::beginPacket(const char *host, uint16_t port)
{
// Look up the host first
int ret = 0;
IPAddress remote_addr;
if (WiFi.hostByName(host, remote_addr))
{
return beginPacket(remote_addr, port);
}
return ret;
}
int WiFiUDP::beginPacket(IPAddress ip, uint16_t port)
{
if (_sock == NO_SOCKET_AVAIL)
_sock = WiFiClass::getSocket();
if (_sock != NO_SOCKET_AVAIL)
{
ServerDrv::startClient(uint32_t(ip), port, _sock, UDP_MODE);
WiFiClass::_state[_sock] = _sock;
return 1;
}
return 0;
}
int WiFiUDP::endPacket()
{
return ServerDrv::sendUdpData(_sock);
}
size_t WiFiUDP::write(uint8_t byte)
{
return write(&byte, 1);
}
size_t WiFiUDP::write(const uint8_t *buffer, size_t size)
{
ServerDrv::insertDataBuf(_sock, buffer, size);
return size;
}
int WiFiUDP::parsePacket()
{
return available();
}
int WiFiUDP::read()
{
uint8_t b;
if (available())
{
ServerDrv::getData(_sock, &b);
return b;
}else{
return -1;
}
}
int WiFiUDP::read(unsigned char* buffer, size_t len)
{
if (available())
{
uint16_t size = 0;
if (!ServerDrv::getDataBuf(_sock, buffer, &size))
return -1;
// TODO check if the buffer is too smal respect to buffer size
return size;
}else{
return -1;
}
}
int WiFiUDP::peek()
{
uint8_t b;
if (!available())
return -1;
ServerDrv::getData(_sock, &b, 1);
return b;
}
void WiFiUDP::flush()
{
// TODO: a real check to ensure transmission has been completed
}
IPAddress WiFiUDP::remoteIP()
{
uint8_t _remoteIp[4] = {0};
uint8_t _remotePort[2] = {0};
WiFiDrv::getRemoteData(_sock, _remoteIp, _remotePort);
IPAddress ip(_remoteIp);
return ip;
}
uint16_t WiFiUDP::remotePort()
{
uint8_t _remoteIp[4] = {0};
uint8_t _remotePort[2] = {0};
WiFiDrv::getRemoteData(_sock, _remoteIp, _remotePort);
uint16_t port = (_remotePort[0]<<8)+_remotePort[1];
return port;
}
|