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POsocket programming in client
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copied!<p>I wrote this program in C++ and on Linux platform.</p> <p>I wrote a client and server socket program.</p> <p>In that client program, I wrote socket function and immediately after that I am doing some other actions not at all depending on socket (I wrote 2 for loops for some other logic).</p> <p>After that I prepared the structures required for the socket and I wrote the connect function...in that I am getting error as unable to connect because connect is returning -1..</p> <p>But for the same program, if I write that for loop's logic above the socket function and immediately after that structures, and connect function, then it is working fine..</p> <p>What might be the reason I am not able to get? Please help me in this aspect. Here is my code</p> <hr> <p>here index1 and index 2 are simple integer variables..The configstring is a char array contains 127.0.0.1:7005(address and port number)...address and port are char array variables to store address and port number..</p> <pre><code>struct sockaddr_in s1; for(index1=0;configstring[index1]!=':';index1++) { address[index1] = configstring[index1]; } address[index1++]='\0'; for(index2=0;configstring[index1]!='\0';index1++,index2++) { port[index2] = configstring[index1]; } port[index2++]='\0'; int port_num = changeto_int(port); if((sock_fd = socket(AF_INET,SOCK_STREAM,0)) == -1) { printf("unable to create a socket\n"); return 0; } s1.sin_family=AF_INET; s1.sin_port=htons(port_num); s1.sin_addr.s_addr=inet_addr(address); memset(s1.sin_zero, '\0', sizeof s1.sin_zero); int errno; if(connect(sock_fd,(struct sockaddr *)&s1,sizeof(s1)) == -1) { printf("error:unable to connect\n"); printf("Error in connect(): %s\n", strerror( errno)); return -1; } </code></pre>

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