Windows support (no TLS yet)

README.md

@@ -69,8 +69,8 @@ If the remote end (server) breaks the connection, the code will try to perpetual
 2. Compile the example C++ code. `sh build.sh`
 3. Install node.js from [here](https://nodejs.org/en/download/).
 4. Type `npm install` to install the node.js dependencies. Then `node broadcast-server.js` to run the server.
-5. Bring up a second terminal. `env USER=bob ./cmd_websocket_chat`
+5. Bring up a second terminal. `./cmd_websocket_chat bob`
-6. Bring up a third terminal. `env USER=bill ./cmd_websocket_chat`
+6. Bring up a third terminal. `./cmd_websocket_chat bill`
 7. Start typing things in any of those terminals. Hopefully you should see your message being received on the other end.
 
 ## C++ code organization

examples/chat/cmd_websocket_chat.cpp

@@ -13,6 +13,7 @@
 #include <sstream>
 #include <queue>
 #include <ixwebsocket/IXWebSocket.h>
+#include <ixwebsocket/IXSocket.h>
 
 #include "nlohmann/json.hpp"
 
@@ -158,13 +159,10 @@ namespace
         _webSocket.send(encodeMessage(text));
     }
 
-    void interactiveMain()
+    void interactiveMain(const std::string& user)
     {
-        std::string user(getenv("USER"));
-
-        WebSocketChat webSocketChat(user);
-
         std::cout << "Type Ctrl-D to exit prompt..." << std::endl;
+        WebSocketChat webSocketChat(user);
         webSocketChat.start();
 
         while (true)
@@ -186,8 +184,15 @@ namespace
     }
 }
 
-int main()
+int main(int argc, char** argv)
 {
-    interactiveMain();
+    std::string user("user");
+    if (argc == 2)
+    {
+        user = argv[1];
+    }
+
+    Socket::init();
+    interactiveMain(user);
     return 0;
 }

ixwebsocket/IXSocket.cpp

@@ -6,22 +6,32 @@
 
 #include "IXSocket.h"
 
-#include <netdb.h>
+#ifdef _WIN32
-#include <netinet/tcp.h>
+# include <basetsd.h>
+# include <WinSock2.h>
+# include <ws2def.h>
+# include <WS2tcpip.h>
+# include <io.h>
+#else
+# include <unistd.h>
+# include <errno.h>
+# include <netdb.h>
+# include <netinet/tcp.h>
+# include <sys/socket.h>
+# include <sys/time.h>
+# include <sys/select.h>
+# include <sys/stat.h>
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <sys/select.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
 #include <assert.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <sys/types.h>
+
+#include <algorithm>
 
 //
 // Linux/Android has a special type of virtual files. select(2) will react
@@ -35,7 +45,7 @@
 // cf Android/Kernel table here 
 // https://android.stackexchange.com/questions/51651/which-android-runs-which-linux-kernel
 //
-#ifndef __APPLE__
+#ifdef __linux__
 # include <sys/eventfd.h>
 #endif
 
@@ -51,7 +61,7 @@ namespace ix
         _sockfd(-1),
         _eventfd(-1)
     {
-#ifndef __APPLE__
+#ifdef __linux__
         _eventfd = eventfd(0, 0);
         assert(_eventfd != -1 && "Panic - eventfd not functioning on this platform");
 #endif
@@ -61,12 +71,12 @@ namespace ix
     {
         close();
 
-#ifndef __APPLE__
+#ifdef __linux__
         ::close(_eventfd);
 #endif
     }
 
-    bool connectToAddress(const struct addrinfo *address, 
+    bool Socket::connectToAddress(const struct addrinfo *address, 
                                   int& sockfd,
                                   std::string& errMsg)
     {
@@ -84,7 +94,7 @@ namespace ix
         int maxRetries = 3;
         for (int i = 0; i < maxRetries; ++i)
         {
-            if (connect(fd, address->ai_addr, address->ai_addrlen) != -1)
+            if (::connect(fd, address->ai_addr, address->ai_addrlen) != -1)
             {
                 sockfd = fd;
                 return true;
@@ -94,7 +104,7 @@ namespace ix
             if (errno != EINTR) break;
         }
 
-        ::close(fd);
+        closeSocket(fd);
         sockfd = -1;
         errMsg = strerror(errno);
         return false;
@@ -142,7 +152,13 @@ namespace ix
     {
         int flag = 1;
         setsockopt(_sockfd, IPPROTO_TCP, TCP_NODELAY, (char*) &flag, sizeof(flag)); // Disable Nagle's algorithm
+
+#ifdef _WIN32
+        unsigned long nonblocking = 1;
+        ioctlsocket(_sockfd, FIONBIO, &nonblocking);
+#else
         fcntl(_sockfd, F_SETFL, O_NONBLOCK); // make socket non blocking
+#endif
 
 #ifdef SO_NOSIGPIPE
         int value = 1;
@@ -163,12 +179,12 @@ namespace ix
         FD_ZERO(&rfds);
         FD_SET(_sockfd, &rfds);
 
-#ifndef __APPLE__
+#ifdef __linux__
         FD_SET(_eventfd, &rfds);
 #endif
 
         int sockfd = _sockfd;
-        int nfds = std::max(sockfd, _eventfd);
+        int nfds = (std::max)(sockfd, _eventfd);
         select(nfds + 1, &rfds, nullptr, nullptr, nullptr);
 
         onPollCallback();
@@ -191,7 +207,7 @@ namespace ix
     {
 #ifdef __APPLE__
         wakeUpFromPollApple();
-#else
+#elif defined(__linux__)
         wakeUpFromPollLinux();
 #endif
     }
@@ -202,7 +218,7 @@ namespace ix
     {
         std::lock_guard<std::mutex> lock(_socketMutex);
 
-#ifndef __APPLE__
+#ifdef __linux__
         if (_eventfd == -1)
         {
             return false; // impossible to use this socket if eventfd is broken
@@ -219,7 +235,7 @@ namespace ix
 
         if (_sockfd == -1) return;
 
-        ::close(_sockfd);
+        closeSocket(_sockfd);
         _sockfd = -1;
     }
 
@@ -245,7 +261,44 @@ namespace ix
         flags = MSG_NOSIGNAL;
 #endif
 
-        return (int) ::recv(_sockfd, buffer, length, flags);
+        return (int) ::recv(_sockfd, (char*) buffer, length, flags);
     }
 
+    int Socket::getErrno() const
+    {
+#ifdef _WIN32
+        return WSAGetLastError();
+#else
+        return errno;
+#endif
+    }
+
+    void Socket::closeSocket(int fd)
+    {
+#ifdef _WIN32
+        closesocket(fd);
+#else
+        ::close(fd);
+#endif
+    }
+
+    bool Socket::init()
+    {
+#ifdef _WIN32
+        INT rc;
+        WSADATA wsaData;
+        
+        rc = WSAStartup(MAKEWORD(2, 2), &wsaData);
+        return rc != 0;
+#else
+        return true;
+#endif
+    }
+
+    void Socket::cleanup()
+    {
+#ifdef _WIN32
+        WSACleanup();
+#endif
+    }
 }

ixwebsocket/IXSocket.h

@@ -11,6 +11,8 @@
 #include <mutex>
 #include <atomic>
 
+struct addrinfo;
+
 namespace ix 
 {
     class Socket {
@@ -20,7 +22,7 @@ namespace ix
         Socket();
         virtual ~Socket();
 
-        static int hostname_connect(const std::string& hostname,
+        int hostname_connect(const std::string& hostname,
                              int port,
                              std::string& errMsg);
         void configure();
@@ -38,13 +40,24 @@ namespace ix
         virtual int send(const std::string& buffer);
         virtual int recv(void* buffer, size_t length);
 
+        int getErrno() const;
+        static bool init(); // Required on Windows to initialize WinSocket
+        static void cleanup(); // Required on Windows to cleanup WinSocket
+
     protected:
         void wakeUpFromPollApple();
         void wakeUpFromPollLinux();
 
+        void closeSocket(int fd);
+
         std::atomic<int> _sockfd;
         int _eventfd;
         std::mutex _socketMutex;
+
+    private:
+        bool connectToAddress(const struct addrinfo *address, 
+                              int& sockfd,
+                              std::string& errMsg);
     };
 
 }

ixwebsocket/IXWebSocketTransport.cpp

@@ -19,9 +19,9 @@
 # endif
 #endif
 
-#include <unistd.h>
+// #include <unistd.h>
-#include <errno.h>
 #include <string.h>
+#include <stdlib.h>
 
 #include <cstdlib>
 #include <vector>
@@ -273,12 +273,12 @@ namespace ix {
                 {
                     int N = (int) _rxbuf.size();
 
-                    ssize_t ret;
+                    int ret;
                     _rxbuf.resize(N + 1500);
                     ret = _socket->recv((char*)&_rxbuf[0] + N, 1500);
 
-                    if (ret < 0 && (errno == EWOULDBLOCK || 
+                    if (ret < 0 && (_socket->getErrno() == EWOULDBLOCK || 
-                                    errno == EAGAIN)) {
+                                    _socket->getErrno() == EAGAIN)) {
                         _rxbuf.resize(N);
                         break;
                     }
@@ -575,8 +575,8 @@ namespace ix {
         {
             int ret = _socket->send((char*)&_txbuf[0], _txbuf.size());
 
-            if (ret < 0 && (errno == EWOULDBLOCK || 
+            if (ret < 0 && (_socket->getErrno() == EWOULDBLOCK || 
-                            errno == EAGAIN))
+                            _socket->getErrno() == EAGAIN))
             {
                 break;
             }