If(bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) = -1) Printf('Server-socket() sockfd is OK. ') Perror('Server-socket() sockfd error lol!') If((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) = -1) * the port users will be connecting to */ *receiverprog.c - a server, datagram sockets*/ The senderprog.c (client) is sending a message to receiverprog.c (server) that acts as listener. The following program examples use the UDP, the connectionless datagram. Notice that if you don’t run the server before you run the client, connect() returns 'Connection refused' message as shown testsocket]$. Well, our server and client programs work! Here we run the server program and let it listens for connection. Server-new socket, new_fd closed successfully. Tcp 0 0 :3490 :1358 testsocket]$Īt server’s console, we have the following testsocket]$. Verify the testsocket]$ netstat -a | grep 3490 clientprog bakawaliĬlient-Received: This is the test string from server! You can try running the server and client program at different testsocket]$. Make sure your previous serverprog program is running. Run the program with server IP address or name as an argument. If((numbytes = recv(sockfd, buf, MAXDATASIZE-1, 0)) = -1)Ĭompile and link the testsocket]$ gcc -g clientprog.c -o clientprog

If(connect(sockfd, (struct sockaddr *)&their_addr, sizeof(struct sockaddr)) = -1) Their_addr.sin_addr = *((struct in_addr *)he->h_addr)

Printf('Server-Using %s and port %d. ', argv, PORT) Printf('Client-The socket() sockfd is OK. ') If((sockfd = socket(AF_INET, SOCK_STREAM, 0)) = -1) Printf('Client-The remote host is: %s ', argv) max number of bytes we can get at onceįprintf(stderr, 'Client-Usage: %s the_client_hostname ', argv) It will get the string that the previous server sends. This client will connect to the host that you specify in the command line, with port 3490. The Fedora machine used for the testing having the ' No Stack Execute ' disabled and the SELinux set to default configuration. Working program examples if any compiled using gcc, tested using the public IPs, run on Linux/ Fedora Core 3, with several times of update, as normal user. Network Story 1 Network Story 2 Network Story 3 Network Story 4 Network Story 5 Network Story 6 Socket Example 1 Socket Example 2 Socket Example 3 Socket Example 4 Socket Example 5 Socket Example 6 Socket Example 7 Advanced TCP/IP 1 Advanced TCP/IP 2 Advanced TCP/IP 3 Advanced TCP/IP 4 Advanced TCP/IP 5 NETWORK PROGRAMMING SOCKET PART 9 - CLIENT & SERVER PROGRAM EXAMPLES

Visual c udp example