NNG_DIALER_CREATE(3)

NAME
nng_dialer_create - create dialer

SYNOPSIS

    #include <nng/nng.h>
    int nng_dialer_create(nng_dialer *dialerp, nng_socket s, const char *url);

DESCRIPTION

The nng_dialer_create() function creates a newly initialized nng_dialer object, associated with socket s, and configured to connect to the address specified by url, and stores a pointer to at the location referenced by dialerp.

Dialers initiate a remote connection to a listener. Upon a successful connection being established, they create a pipe, add it to the socket, and then wait for that pipe to be closed. When the pipe is closed, they will re-initiate the connection. Dialers will also periodically retry a connection automatically if an attempt to connect asynchronously fails.

    Tip

    While it is convenient to think of dialers as clients, the relationship between the listener or dialer is orthogonal to any server or client status that might be associated with a given protocol. For example, a req socket might have associated dialers, but might also have associated listeners. It may even have some of each at the same time!

The dialer is not started, but may be further configured with the nng_dialer_setopt() family of functions.

Once it is fully configured, the dialer may be started using the nng_dialer_start() function.

    Tip

    If no specific configuration is required, consider using the simpler nng_dial() function instead.

RETURN VALUES

This function returns 0 on success, and non-zero otherwise.

ERRORS

NNG_EADDRINVAL
    An invalid url was specified.

NNG_ECLOSED
    The socket s is not open.

NNG_ENOMEM
    Insufficient memory is available.

SEE ALSO

nng_dial(3), nng_dialer_close(3), nng_dialer_getopt(3), nng_dialer_setopt(3), nng_dialer_start(3), nng_listener_create(3) nng_strerror(3), nng_dialer(5), nng(7)