Ns_SockAsyncConnect

Overview

Syntax

    SOCKET Ns_SockAsyncConnect (
    char *host,
    int port
    );

Description

Ns_SockAsyncConnect creates a socket connected to a remote host and port, returning immediately with the connection in progress. A select call can later be used to determine when the connection has been established.

Examples

    SOCKET sock;
    fd_set set;
    struct timeval tv;
    sock = Ns_SockAsyncConnect("mailhost", 25);
    ... perform some other work while connection is in progress...
    
    ... check for connection ...
    tv.tv_sec = 2; /* allow 2 more seconds */
    tv.tv_usec = 0;
    FD_ZERO(&set);
    FD_SET(sock, &set);
    if (select(sock+1, NULL, &set, NULL, &tv) != 1) {
      ... timeout - close socket and return error...
      Ns_CloseLater(sock); 
    } else {
      ... use socket ...
    }

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