added arduino, modified build
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215
arduino/libraries/Ethernet/src/EthernetClient.cpp
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215
arduino/libraries/Ethernet/src/EthernetClient.cpp
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/* Copyright 2018 Paul Stoffregen
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this
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* software and associated documentation files (the "Software"), to deal in the Software
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* without restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <Arduino.h>
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#include "Ethernet.h"
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#include "Dns.h"
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#include "utility/w5100.h"
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int EthernetClient::connect(const char * host, uint16_t port)
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{
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DNSClient dns; // Look up the host first
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IPAddress remote_addr;
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if (sockindex < MAX_SOCK_NUM) {
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if (Ethernet.socketStatus(sockindex) != SnSR::CLOSED) {
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Ethernet.socketDisconnect(sockindex); // TODO: should we call stop()?
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}
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sockindex = MAX_SOCK_NUM;
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}
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dns.begin(Ethernet.dnsServerIP());
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if (!dns.getHostByName(host, remote_addr)) return 0; // TODO: use _timeout
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return connect(remote_addr, port);
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}
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int EthernetClient::connect(IPAddress ip, uint16_t port)
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{
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if (sockindex < MAX_SOCK_NUM) {
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if (Ethernet.socketStatus(sockindex) != SnSR::CLOSED) {
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Ethernet.socketDisconnect(sockindex); // TODO: should we call stop()?
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}
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sockindex = MAX_SOCK_NUM;
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}
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#if defined(ESP8266) || defined(ESP32)
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if (ip == IPAddress((uint32_t)0) || ip == IPAddress(0xFFFFFFFFul)) return 0;
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#else
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if (ip == IPAddress(0ul) || ip == IPAddress(0xFFFFFFFFul)) return 0;
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#endif
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sockindex = Ethernet.socketBegin(SnMR::TCP, 0);
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if (sockindex >= MAX_SOCK_NUM) return 0;
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Ethernet.socketConnect(sockindex, rawIPAddress(ip), port);
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uint32_t start = millis();
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while (1) {
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uint8_t stat = Ethernet.socketStatus(sockindex);
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if (stat == SnSR::ESTABLISHED) return 1;
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if (stat == SnSR::CLOSE_WAIT) return 1;
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if (stat == SnSR::CLOSED) return 0;
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if (millis() - start > _timeout) break;
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delay(1);
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}
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Ethernet.socketClose(sockindex);
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sockindex = MAX_SOCK_NUM;
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return 0;
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}
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int EthernetClient::availableForWrite(void)
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{
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if (sockindex >= MAX_SOCK_NUM) return 0;
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return Ethernet.socketSendAvailable(sockindex);
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}
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size_t EthernetClient::write(uint8_t b)
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{
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return write(&b, 1);
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}
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size_t EthernetClient::write(const uint8_t *buf, size_t size)
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{
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if (sockindex >= MAX_SOCK_NUM) return 0;
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if (Ethernet.socketSend(sockindex, buf, size)) return size;
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setWriteError();
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return 0;
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}
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int EthernetClient::available()
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{
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if (sockindex >= MAX_SOCK_NUM) return 0;
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return Ethernet.socketRecvAvailable(sockindex);
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// TODO: do the Wiznet chips automatically retransmit TCP ACK
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// packets if they are lost by the network? Someday this should
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// be checked by a man-in-the-middle test which discards certain
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// packets. If ACKs aren't resent, we would need to check for
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// returning 0 here and after a timeout do another Sock_RECV
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// command to cause the Wiznet chip to resend the ACK packet.
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}
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int EthernetClient::read(uint8_t *buf, size_t size)
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{
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if (sockindex >= MAX_SOCK_NUM) return 0;
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return Ethernet.socketRecv(sockindex, buf, size);
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}
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int EthernetClient::peek()
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{
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if (sockindex >= MAX_SOCK_NUM) return -1;
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if (!available()) return -1;
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return Ethernet.socketPeek(sockindex);
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}
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int EthernetClient::read()
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{
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uint8_t b;
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if (Ethernet.socketRecv(sockindex, &b, 1) > 0) return b;
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return -1;
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}
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void EthernetClient::flush()
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{
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while (sockindex < MAX_SOCK_NUM) {
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uint8_t stat = Ethernet.socketStatus(sockindex);
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if (stat != SnSR::ESTABLISHED && stat != SnSR::CLOSE_WAIT) return;
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if (Ethernet.socketSendAvailable(sockindex) >= W5100.SSIZE) return;
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}
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}
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void EthernetClient::stop()
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{
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if (sockindex >= MAX_SOCK_NUM) return;
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// attempt to close the connection gracefully (send a FIN to other side)
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Ethernet.socketDisconnect(sockindex);
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unsigned long start = millis();
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// wait up to a second for the connection to close
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do {
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if (Ethernet.socketStatus(sockindex) == SnSR::CLOSED) {
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sockindex = MAX_SOCK_NUM;
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return; // exit the loop
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}
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delay(1);
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} while (millis() - start < _timeout);
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// if it hasn't closed, close it forcefully
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Ethernet.socketClose(sockindex);
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sockindex = MAX_SOCK_NUM;
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}
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uint8_t EthernetClient::connected()
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{
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if (sockindex >= MAX_SOCK_NUM) return 0;
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uint8_t s = Ethernet.socketStatus(sockindex);
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return !(s == SnSR::LISTEN || s == SnSR::CLOSED || s == SnSR::FIN_WAIT ||
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(s == SnSR::CLOSE_WAIT && !available()));
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}
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uint8_t EthernetClient::status()
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{
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if (sockindex >= MAX_SOCK_NUM) return SnSR::CLOSED;
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return Ethernet.socketStatus(sockindex);
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}
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// the next function allows us to use the client returned by
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// EthernetServer::available() as the condition in an if-statement.
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bool EthernetClient::operator==(const EthernetClient& rhs)
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{
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if (sockindex != rhs.sockindex) return false;
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if (sockindex >= MAX_SOCK_NUM) return false;
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if (rhs.sockindex >= MAX_SOCK_NUM) return false;
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return true;
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}
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// https://github.com/per1234/EthernetMod
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// from: https://github.com/ntruchsess/Arduino-1/commit/937bce1a0bb2567f6d03b15df79525569377dabd
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uint16_t EthernetClient::localPort()
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{
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if (sockindex >= MAX_SOCK_NUM) return 0;
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uint16_t port;
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SPI.beginTransaction(SPI_ETHERNET_SETTINGS);
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port = W5100.readSnPORT(sockindex);
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SPI.endTransaction();
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return port;
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}
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// https://github.com/per1234/EthernetMod
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// returns the remote IP address: http://forum.arduino.cc/index.php?topic=82416.0
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IPAddress EthernetClient::remoteIP()
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{
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if (sockindex >= MAX_SOCK_NUM) return IPAddress((uint32_t)0);
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uint8_t remoteIParray[4];
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SPI.beginTransaction(SPI_ETHERNET_SETTINGS);
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W5100.readSnDIPR(sockindex, remoteIParray);
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SPI.endTransaction();
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return IPAddress(remoteIParray);
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}
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// https://github.com/per1234/EthernetMod
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// from: https://github.com/ntruchsess/Arduino-1/commit/ca37de4ba4ecbdb941f14ac1fe7dd40f3008af75
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uint16_t EthernetClient::remotePort()
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{
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if (sockindex >= MAX_SOCK_NUM) return 0;
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uint16_t port;
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SPI.beginTransaction(SPI_ETHERNET_SETTINGS);
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port = W5100.readSnDPORT(sockindex);
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SPI.endTransaction();
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return port;
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}
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