1 files changed, 164 insertions, 0 deletions
diff --git a/libraries/Ethernet/Client.cpp b/libraries/Ethernet/Client.cpp
new file mode 100644
index 0000000..f146ac5
--- /dev/null
+++ b/libraries/Ethernet/Client.cpp
@@ -0,0 +1,164 @@
+#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;
+}