--- /dev/null
+#include <cerrno>
+#include <msp/core/systemerror.h>
+#include <msp/io/handle_private.h>
+#include <msp/strings/format.h>
+#include "datagramsocket.h"
+#include "sockaddr_private.h"
+#include "socket_private.h"
+
+namespace Msp {
+namespace Net {
+
+DatagramSocket::DatagramSocket(Family f, int p):
+ ClientSocket(f, SOCK_DGRAM, p)
+{
+#ifdef WIN32
+ WSAEventSelect(priv->handle, *priv->event, FD_READ|FD_CLOSE);
+#endif
+ set_events(IO::P_INPUT);
+}
+
+bool DatagramSocket::connect(const SockAddr &addr)
+{
+ SockAddr::SysAddr sa = addr.to_sys();
+
+ int err = ::connect(priv->handle, reinterpret_cast<sockaddr *>(&sa.addr), sa.size);
+ if(err==-1)
+ {
+#ifdef WIN32
+ throw system_error("connect", WSAGetLastError());
+#else
+ throw system_error("connect");
+#endif
+ }
+
+ delete peer_addr;
+ peer_addr = addr.copy();
+
+ delete local_addr;
+ SockAddr::SysAddr lsa;
+ getsockname(priv->handle, reinterpret_cast<sockaddr *>(&lsa.addr), &lsa.size);
+ local_addr = SockAddr::new_from_sys(lsa);
+
+ connected = true;
+
+ return true;
+}
+
+unsigned DatagramSocket::sendto(const char *buf, unsigned size, const SockAddr &addr)
+{
+ if(size==0)
+ return 0;
+
+ SockAddr::SysAddr sa = addr.to_sys();
+
+ int ret = ::sendto(priv->handle, buf, size, 0, reinterpret_cast<sockaddr *>(&sa.addr), sa.size);
+ if(ret<0)
+ {
+ if(errno==EAGAIN)
+ return 0;
+ else
+ {
+#ifdef WIN32
+ throw system_error("sendto", WSAGetLastError());
+#else
+ throw system_error("sendto");
+#endif
+ }
+ }
+
+ return ret;
+}
+
+unsigned DatagramSocket::recvfrom(char *buf, unsigned size, SockAddr *&from_addr)
+{
+ if(size==0)
+ return 0;
+
+ SockAddr::SysAddr sa;
+ int ret = ::recvfrom(priv->handle, buf, size, 0, reinterpret_cast<sockaddr *>(&sa.addr), &sa.size);
+ if(ret<0)
+ {
+ if(errno==EAGAIN)
+ return 0;
+ else
+ {
+#ifdef WIN32
+ throw system_error("recvfrom", WSAGetLastError());
+#else
+ throw system_error("recvfrom");
+#endif
+ }
+ }
+
+ from_addr = SockAddr::new_from_sys(sa);
+
+ return ret;
+}
+
+} // namespace Net
+} // namespace Msp