Fixed error messages

lib/tcp-listener.c

@@ -24,14 +24,16 @@ struct addrinfo* tcp_createIPv4Socket(SOCKET *s,int port,bool wildcard){
     sprintf( sport, "%d", port);
     int res = getaddrinfo(NULL, sport, &hint, &result);
     if (res != 0) {
-        logger_log("Error creating address information! Error code: %d", errno);
+        logger_log("Error creating address information!");
+        printLastError();
         return NULL;
     }
 
     //Creating listening socket
     *s = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
     if (*s == INVALID_SOCKET) {
-        logger_log("Error creating socket! Error: %d", errno);
+        logger_log("Error creating socket!");
+        printLastError();
         return NULL;
     }
     return result;
@@ -41,12 +43,7 @@ int tcp_bindnlisten(SOCKET s,struct addrinfo* addr,int conn_count){
     int res = bind(s, addr->ai_addr, addr->ai_addrlen);
     if (res == SOCKET_ERROR) {
         logger_log("Error binding socket!");
-        int r = errno;
+        printLastError();
-        switch(r){
-            default:
-                logger_log("Error: %s",strerror(errno));
-                break;
-        }
         freeaddrinfo(addr);
         return 1;
     }
@@ -55,7 +52,8 @@ int tcp_bindnlisten(SOCKET s,struct addrinfo* addr,int conn_count){
 
     res = listen(s, conn_count);
     if (res == -1) {
-        logger_log("Error starting listening! Error: %d", errno);
+        logger_log("Error starting listening!");
+        printLastError();
         closesocket(s);
         return 2;
     }
@@ -66,7 +64,8 @@ struct sockaddr_in tcp_getAddr_in(SOCKET s) {
     struct sockaddr_in sin;
     socklen_t len = sizeof(sin);
     if (getsockname(s, (struct sockaddr *) &sin, &len) == -1) {
-        logger_log("Error at getsockname!Error code: %d", errno);
+        logger_log("Error at getsockname!");
+        printLastError();
         closesocket(s);
         exit(1);
     }
@@ -76,6 +75,21 @@ int tcp_getSockPort(SOCKET s){
     struct sockaddr_in sin = tcp_getAddr_in(s);
     return ntohs(sin.sin_port);
 }
+
+void printLastError() {
+#ifdef _WIN32
+    wchar_t *s = NULL;
+    FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+                   NULL, WSAGetLastError(),
+                   MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                   (LPWSTR)&s, 0, NULL);
+    logger_log("%S\n", s);
+    LocalFree(s);
+#else
+    logger_log("%s", strerror(errno));
+#endif
+}
+
 #if defined(__linux__) || defined(__CYGWIN__)
 int closesocket(SOCKET s) {
         return close(s);

lib/tcp-listener.h

@@ -47,4 +47,6 @@ struct sockaddr_in tcp_getAddr_in(SOCKET socket);
  * @param[in] socket
  * @return A socket portszáma
  */
-int tcp_getSockPort(SOCKET socket);
+int tcp_getSockPort(SOCKET socket);
+
+void printLastError();

main.c

@@ -39,6 +39,7 @@ int main(void) {
     int r1 = WSAStartup(MAKEWORD(2,2),&ws);
     if(r1 != 0){
         logger_log("Error at WSAStartup.");
+        printLastError();
         free(config.pairs);
         return EXIT_FAILURE;
     }

modules/webio.c

@@ -183,7 +183,7 @@ static int webio_handleGETrequest(SOCKET client, WebIO wio, char *file) {
             char puf[len];
             while (total_bytes_sent < length) {
                 bytes_sent = sendfile(client,fd,0,length);
-                if(bytes_sent == -1) logger_log("Error: %s",strerror(errno));
+                if(bytes_sent == -1) printLastError();
                 total_bytes_sent += bytes_sent;
             }
         }
@@ -232,7 +232,8 @@ static int webio_handlePOSTrequest(SOCKET client, WebIO wio, Map post) {
         sprintf(buf, "@message=%s", map_getValue(post, "message"));
         res = send(wio.list->array[i].socket, buf, DEFAULT_BUFLEN, 0);
         if (res == SOCKET_ERROR) {
-            logger_log("Error sending message.Error: %d", errno);
+            logger_log("Error sending message!");
+            printLastError();
             return 2;
         }
         logger_log("Message sent to %s", map_getValue(post, "id"));