🌟 cross-compilling windows/unix

Makefile

@@ -1,13 +1,18 @@
 ## Compile client & server
 
 CC=gcc
+
+# Uncomment this lines to use compile to windows on an unix based system
+# CC=i686-w64-mingw32-gcc
+# CFLAGS+= -lws2_32
+
 PROGRAMS=$(SERVER_BINARY) $(CLIENT_BINARY)
 
 # Uncomment this line in case of linker error while building
-# CFLAGS=-fno-use-linker-plugin
+# CFLAGS+= -fno-use-linker-plugin
 
 ifeq ($(OS),Windows_NT)
-	CFLAGS+= -l ws2_32
+	CFLAGS+= -lws2_32
 endif
 
 ## SERVER
@@ -24,11 +29,11 @@ all: $(PROGRAMS)
 
 $(SERVER_BINARY): $(SERVER_OBJECTS)
 	mkdir -p bin/
-	$(CC) $^ -o $@
+	$(CC) $^ -o $@ $(CFLAGS)
 
 $(CLIENT_BINARY): $(CLIENT_OBJECTS)
 	mkdir -p bin/
-	$(CC) $^ -o $@
+	$(CC) $^ -o $@ $(CFLAGS)
 
 %.o:%.c
 	$(CC) -c $^ -o $@ $(CFLAGS)

client/socket/socket.c

@@ -1,5 +1,6 @@
 #ifdef _WIN32
 #include <winsock2.h>
+#include <Ws2tcpip.h>
 #else
 #include <sys/socket.h>
 #include <netinet/in.h>
@@ -16,7 +17,12 @@ int init_socket(int *client, int *sock)
 {
 #ifdef _WIN32
 	WSADATA wsa;
-	WSAStartup(MAKEWORD(2, 0), &wsa);
+
+	if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
+	{
+		printf("Failed. Error Code : %d",WSAGetLastError());
+		return -1;
+	}
 #endif
 
 	int port = 8080;
@@ -30,12 +36,22 @@ int init_socket(int *client, int *sock)
 	serv_addr.sin_family = AF_INET;
 	serv_addr.sin_port = htons(port);
 
+#ifdef _WIN32
+	// Convert IP address from text to binary
+	if (InetPtonW(AF_INET, L"127.0.0.1", &serv_addr.sin_addr) <= 0)
+	{
+		printf("[x] Error while converting IP.\n");
+		return -1;
+	}
+
+#else
 	// Convert IP address from text to binary
 	if (inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) <= 0)
 	{
 		printf("[x] Error while converting IP.\n");
 		return -1;
 	}
+#endif
 
 	// Connect client to server
 	if((*client = connect(*sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr))) < 0)
@@ -82,12 +98,21 @@ int receive_socket(int sock, char *buffer)
 {
 	int error;
 
+#ifdef _WIN32
+	error = recv(sock, buffer, 1024, 0);
+	if (error < 0)
+	{
+		printf("[x] Error while receiving from server\n");
+		return -1;
+	}	
+#else
 	error = read(sock, buffer, 1024);
 	if (error < 0)
 	{
 		printf("[x] Error while receiving from server\n");
 		return -1;
 	}
+#endif
 
 	printf("< %s\n", buffer);
 	return 0;

server/socket/socket.c

@@ -15,7 +15,12 @@ int init_socket(int *client, int *sock)
 {
 #ifdef _WIN32
 	WSADATA wsa;
-	WSAStartup(MAKEWORD(2, 0), &wsa);
+
+	if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
+	{
+		printf("Failed. Error Code : %d",WSAGetLastError());
+		return -1;
+	}
 #endif
 
     const int port = 8080;
@@ -36,15 +41,24 @@ int init_socket(int *client, int *sock)
         return -1;
     }
 
+#ifdef _WIN32
+    // Set address for reuse
+    if (setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, (char *) &opt, sizeof(opt)) < 0)
+    {
+        printf("[x] Error while setting address for reuse\n");
+        return -1;
+    }
+#else
     // Set address for reuse
-    if (setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, &opt, (socklen_t)sizeof(opt)) < 0)
+    if (setsockopt(*sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0)
     {
         printf("[x] Error while setting address for reuse\n");
         return -1;
     }
+#endif
 
     // Bind address and port to socket
-    if (bind(*sock, (struct sockaddr *)&address, (socklen_t)addrlen) < 0)
+    if (bind(*sock, (struct sockaddr *)&address, addrlen) < 0)
     {
         printf("[x] Error while binding the socket.\n");
         return -1;
@@ -57,12 +71,22 @@ int init_socket(int *client, int *sock)
         return -1;
     }
 
+#ifdef _WIN32
+    // Accept client connection
+    if ((*client = accept(*sock, (struct sockaddr *)&address, &addrlen)) < 0)
+    {
+        printf("[x] Error while accepting the client.\n");
+        return -1;
+    }
+#else
     // Accept client connection
     if ((*client = accept(*sock, (struct sockaddr *)&address, (socklen_t *)&addrlen)) < 0)
     {
         printf("[x] Error while accepting the client.\n");
         return -1;
     }
+#endif
+
 	printf("[+] Client Connected!\n");
 
     return 0;
@@ -103,12 +127,21 @@ int receive_socket(int client, char *buffer)
 {
 	int error;
 
+#ifdef _WIN32
+	error = recv(client, buffer, 1024, 0);
+	if (error < 0)
+	{
+		printf("[x] Error while receiving from client\n");
+		return -1;
+	}	
+#else
 	error = read(client, buffer, 1024);
 	if (error < 0)
 	{
 		printf("[x] Error while receiving from client\n");
 		return -1;
 	}
+#endif
 
 	printf("< %s\n", buffer);
 	return 0;