fd-transport.c

An example that shows how to use file descriptor (fd) transport.

/*
 * 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 <stdlib.h>
#include <errno.h>
#include <string.h>
#include <glib.h>
#include <sys/socket.h>
#include <rpc/object.h>
#include <rpc/client.h>
#include <rpc/server.h>
#include <rpc/service.h>

int
main(int argc, const char *argv[])
{
    rpc_context_t ctx;
    rpc_server_t server;
    rpc_client_t client;
    rpc_connection_t conn;
    rpc_object_t result;
    int fd[2];

    if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) != 0) {
        fprintf(stderr, "socketpair() failed: %s", strerror(errno));
        return (EXIT_FAILURE);
    }

    ctx = rpc_context_create();

    rpc_context_register_block(ctx, NULL, "hello", NULL,
        ^(void *cookie, rpc_object_t args) {
        return rpc_string_create("world");
    });

    server = rpc_server_create("fd://", ctx);
    if (server == NULL) {
        fprintf(stderr, "cannot create server: %s", strerror(errno));
        return (1);
    }

    client = rpc_client_create(g_strdup_printf("fd://%d", fd[1]), NULL);
    if (client == NULL) {
        fprintf(stderr, "cannot connect: %s", strerror(errno));
        return (1);
    }

    rpc_server_resume(server);

    conn = rpc_client_get_connection(client);
    result = rpc_connection_call_simple(conn, "hello", "[s]", "world");
    printf("result = %s\n", rpc_string_get_string_ptr(result));

    rpc_client_close(client);
    rpc_server_close(server);
    return (0);
}