Very Computer

Hi all,

I need to find ipaddress or address of a connected client.  I
have look in the sockaddr structure when the accept function
is called, but it was not complete.  I am thinking of calling
getpeername(..). Is there a place I can look this up? (ftp
sites, etc.) or maybe someone here has a piece of code that
will do this.

Any suggestions would be appreciated.  
Thanks,
Donald.
--
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                    "SOME HEADS ARE GONNA ROLL"
                 "HELL-BENT HELL-BENT FOR LEATHER"

Two potential problems:

If a user rexecs something, then there will not be an entrym for
the client in the utmp file.

If the client is in DNS, getutent() may return the resolved hostname
instead of the full IP address. May be a problem, may not be.

Respectfully,

Jonathan Lent
JCPenney Company (comments are mine -- of course)

// --- newClientConnection
// ---
// --- create a seperate socket for a new client connection
// ---
// --- in : socket of server
// --- out: socket-descriptor for the connection-endpoint to
// ---      the new client

static int newClientConnection(int server_socket) {
    struct sockaddr_in sockaddr;
    int                client_socket;
    int                addr_len;
    char*              client_name;

    addr_len = sizeof(sockaddr);
    client_socket = accept(server_socket, (struct sockaddr *)&sockaddr,
                           &addr_len);
    // ---
    // --- get hostname of requesting client
    // ---
    struct hostent *hp  =
      gethostbyaddr( (char*) &sockaddr.sin_addr,
                     sizeof( struct in_addr),
                     sockaddr.sin_family);
    if ( hp )
        // --- real hostname
        client_name = hp->h_name;
    else
        // --- internet-address
        client_name = inet_ntoa( sockaddr.sin_addr );

    cout << "ConReq by client " << client_name
         << " [" << inet_ntoa( sockaddr.sin_addr ) << "]" << endl;

    return client_socket;

Quote:}

---
Roland Geier                    Phone: ++49 (851) 509-3107          
Universitaet Passau, GER        Fax  : ++49 (851) 509-1802

D-94032 Passau