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POCan the server use the same socket to send the response to the client? how?
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copied!<p>I am using Berkeley sockets (both: Internet domain and Unix domain) and I was wondering if the server can use the same sockets for reading the request and writing a response to the client. Or should the client create an other socket to wait for the replay and the server connect to it after processing the message received.</p> <p>By the way, I am talking about connection oriented sockets (stream sockets, TCP, ...).</p> <p>This is the simplified server code (I ommit error checking on system calls here just for simplicity):</p> <pre><code>int main() { int server_socket, connected_socket; struct sockaddr_in server_addr; char buf[1024]; char aux[256]; int bytes_read; server_socket = socket(AF_INET, SOCK_STREAM, 0); server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = INADDR_ANY; server_addr.sin_port = htons(1234); bind(server_socket, &server_addr, sizeof(server_addr)) listen(server_socket, 5) connected_sodket = accept(server_socket, 0, 0); do { bzero(buf, sizeof(buf)); bytes_read = read(connected_socket, buf, sizeof(buf)); } while (bytes_read > 0); /* Here I want to use connected_socket to write the reply, can I? */ close(connected_socket); close(server_socket); return (EXIT_SUCCESS); } </code></pre> <p>And this is the simplified client code (I ommit error checking on system calls here just for simplicity):</p> <pre><code>int main() { int client_socket; struct sockaddr_in server_addr; client_socket = socket(AF_INET, SOCK_STREAM, 0); hp = gethostbyname("myhost"); server_addr.sin_family = AF_INET; memcpy(&server_addr.sin_addr, hp->h_addr_list[0], hp->h_length); server_addr.sin_port = htons(1234); connect(client_socket, &server_addr, sizeof(server_addr)); write(client_socket, MSG, sizeof(MSG)); /* Here I want to wait for a response from the server using client_socket, can I? */ close(client_socket); return (EXIT_SUCCESS); } </code></pre> <p>Can I use <code>connected_socket</code> in the server and <code>client_socket</code> in the client to pass a response message back? Or should I use the client address I get in the server when in "accept" to connect to a socket in the client?</p> <p>I have tried by using read/wrint in the client/server where the comment is shown but that way both programs keep blocked, it seems to be a dead-lock.</p> <p>Thanks ins advance! Regards.</p>

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