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POUDP Client shows 'UDP Connected' while no UDP Server running on localhost
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copied!<p>What is wrong with the following function ??</p> <p>It should throw an error as I have no UDP server running on localhost.</p> <pre><code>int openUdpSocket(int port) { int sock,sin_size; struct sockaddr_in server_addr; memset(&server_addr, 0, sizeof(server_addr)); struct hostent *host; host= (struct hostent *) gethostbyname((char *)"127.0.0.1"); if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) { perror("socket"); exit(1); } server_addr.sin_family = AF_INET; server_addr.sin_port = htons(port); server_addr.sin_addr = *((struct in_addr *)host->h_addr); bzero(&(server_addr.sin_zero),8); sin_size = sizeof(struct sockaddr); </code></pre> <p>Now the Following part causing trouble : -</p> <pre><code> int error = connect(sock, (struct sockaddr *)&server_addr, sizeof(server_addr)); if(error < 0){ printf("Connection error\n"); exit(-1); } if (verbose) printf("UDP connected\n"); return sock; </code></pre> <p>}</p> <p>Output:</p> <pre><code> udit@mylaptop:~/Desktop/benchmark$ ./a.out UDP connected </code></pre> <p>Note that I have created a similar function for <code>TCP</code> and the same thing is working fine with TCP that means when no TCP Server running it shows <code>connection error</code> and when TCP Server running then <code>TCP Connected</code></p> <p>The UDP Client mentioned above needs to receive response in form of some status codes in future. SO, Do I need to use bind() function here ??</p>

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