modbus_set_socket man page

modbus_set_socket — set socket of the context

Synopsis

void modbus_set_socket(modbus_t *ctx, int socket);

Description

The modbus_set_socket() function shall set the socket or file descriptor in the libmodbus context. This function is useful for managing multiple client connections to the same server.

Return Value

There is no return values.

Example

ctx = modbus_new_tcp("127.0.0.1", 1502);
server_socket = modbus_tcp_listen(ctx, NB_CONNECTION);

FD_ZERO(&rdset);
FD_SET(server_socket, &rdset);

/* .... */

if (FD_ISSET(master_socket, &rdset)) {
    modbus_set_socket(ctx, master_socket);
    rc = modbus_receive(ctx, query);
    if (rc != -1) {
        modbus_reply(ctx, query, rc, mb_mapping);
    }
}

See Also

modbus_get_socket(3)

Authors

The libmodbus documentation was written by Stéphane Raimbault <stephane.raimbault@gmail.com[1]>

Notes

1.

stephane.raimbault@gmail.com

mailto:stephane.raimbault@gmail.com

Referenced By

libmodbus(7), modbus_get_socket(3), modbus_receive(3).

04/02/2014 libmodbus 3.0.6 Libmodbus Manual