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#include "w5100.h"
#include "socket.h"
extern "C" {
#include "string.h"
}
#include "Arduino.h"
#include "Ethernet.h"
#include "Client.h"
#include "Server.h"
#include "Dns.h"
uint16_t Client::_srcport = 1024;
Client::Client() : _sock(MAX_SOCK_NUM) {
}
Client::Client(uint8_t sock) : _sock(sock) {
}
int Client::connect(const char* host, uint16_t port) {
// Look up the host first
int ret = 0;
DNSClient dns;
IPAddress remote_addr;
dns.begin(Ethernet.dnsServerIP());
ret = dns.getHostByName(host, remote_addr);
if (ret == 1) {
return connect(remote_addr, port);
} else {
return ret;
}
}
int Client::connect(IPAddress ip, uint16_t port) {
if (_sock != MAX_SOCK_NUM)
return 0;
for (int i = 0; i < MAX_SOCK_NUM; i++) {
uint8_t s = W5100.readSnSR(i);
if (s == SnSR::CLOSED || s == SnSR::FIN_WAIT) {
_sock = i;
break;
}
}
if (_sock == MAX_SOCK_NUM)
return 0;
_srcport++;
if (_srcport == 0) _srcport = 1024;
socket(_sock, SnMR::TCP, _srcport, 0);
if (!::connect(_sock, ip.raw_address(), port)) {
_sock = MAX_SOCK_NUM;
return 0;
}
while (status() != SnSR::ESTABLISHED) {
delay(1);
if (status() == SnSR::CLOSED) {
_sock = MAX_SOCK_NUM;
return 0;
}
}
return 1;
}
void Client::write(uint8_t b) {
if (_sock != MAX_SOCK_NUM)
send(_sock, &b, 1);
}
void Client::write(const char *str) {
if (_sock != MAX_SOCK_NUM)
send(_sock, (const uint8_t *)str, strlen(str));
}
void Client::write(const uint8_t *buf, size_t size) {
if (_sock != MAX_SOCK_NUM)
send(_sock, buf, size);
}
int Client::available() {
if (_sock != MAX_SOCK_NUM)
return W5100.getRXReceivedSize(_sock);
return 0;
}
int Client::read() {
uint8_t b;
if ( recv(_sock, &b, 1) > 0 )
{
// recv worked
return b;
}
else
{
// No data available
return -1;
}
}
int Client::read(uint8_t *buf, size_t size) {
return recv(_sock, buf, size);
}
int Client::peek() {
uint8_t b;
// Unlike recv, peek doesn't check to see if there's any data available, so we must
if (!available())
return -1;
::peek(_sock, &b);
return b;
}
void Client::flush() {
while (available())
read();
}
void Client::stop() {
if (_sock == MAX_SOCK_NUM)
return;
// attempt to close the connection gracefully (send a FIN to other side)
disconnect(_sock);
unsigned long start = millis();
// wait a second for the connection to close
while (status() != SnSR::CLOSED && millis() - start < 1000)
delay(1);
// if it hasn't closed, close it forcefully
if (status() != SnSR::CLOSED)
close(_sock);
EthernetClass::_server_port[_sock] = 0;
_sock = MAX_SOCK_NUM;
}
uint8_t Client::connected() {
if (_sock == MAX_SOCK_NUM) return 0;
uint8_t s = status();
return !(s == SnSR::LISTEN || s == SnSR::CLOSED || s == SnSR::FIN_WAIT ||
(s == SnSR::CLOSE_WAIT && !available()));
}
uint8_t Client::status() {
if (_sock == MAX_SOCK_NUM) return SnSR::CLOSED;
return W5100.readSnSR(_sock);
}
// the next function allows us to use the client returned by
// Server::available() as the condition in an if-statement.
Client::operator bool() {
return _sock != MAX_SOCK_NUM;
}
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