bus.c

This is an example of using RPC bus API to enumerate librpc-capable USB devices in the system.

/*
 * Copyright 2017 Two Pore Guys, Inc.
 * All rights reserved
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted providing that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <rpc/object.h>
#include <rpc/client.h>
#include <rpc/bus.h>

int
main(int argc, const char *argv[])
{
    struct rpc_bus_node *nodes;
    int n, i;
    int ret;

    (void)argc;
    (void)argv;

    rpc_bus_open();

    n = rpc_bus_enumerate(&nodes);
    if (n < 0) {
        fprintf(stderr, "rpc_bus_enumerate: %s\n", strerror(errno));
        return (1);
    }

    for (i = 0; i < n; i++) {
        printf("%d: %s (%s)\n", nodes[i].rbn_address,
            nodes[i].rbn_name, nodes[i].rbn_description);

        ret = rpc_bus_ping(nodes[i].rbn_name);
        switch (ret) {
        case 1:
            printf("    responds to ping\n");
            break;

        default:
            printf("    failed to ping, error %d [%s]\n", errno,
                strerror(errno));
            break;
        }
    }

    rpc_bus_free_result(nodes);
    rpc_bus_close();
    return (0);
}