Start work on DST

src/system.h

@@ -0,0 +1,36 @@
+#ifndef SYSTEM_INCLUDED
+#define SYSTEM_INCLUDED
+
+#ifdef _WIN32
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <poll.h>
+#include <errno.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#define SOCKET int
+#define INVALID_SOCKET -1
+#endif
+
+#if !defined(_WIN32) || defined(BUILD_TEST)
+typedef int Socket;
+#define BAD_SOCKET ((Socket) -1)
+#else
+typedef SOCKET Socket;
+#define BAD_SOCKET INVALID_SOCKET
+#endif
+
+Socket sys_socket      (int domain, int type, int protocol);
+int    sys_bind        (Socket fd, void *addr, size_t addr_len);
+int    sys_listen      (Socket fd, int backlog);
+int    sys_closesocket (Socket fd);
+int    sys_poll        (struct pollfd *polled, int num_polled, int timeout);
+Socket sys_accept      (Socket fd, void *addr, int *addr_len);
+int    sys_getsockopt  (Socket fd, int level, int optname, void *optval, socklen_t *optlen);
+int    sys_setsockopt  (Socket fd, int level, int optname, void *optval, socklen_t optlen);
+int    sys_recv        (Socket fd, void *dst, int len, int flags);
+int    sys_send        (Socket fd, void *src, int len, int flags);
+int    sys_connect     (Socket fd, void *addr, size_t addr_len);
+
+#endif // SYSTEM_INCLUDED