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/*
* rpc_server_loopback.c
* ---------------------
* Remote procedure call transport over loopback socket.
*
* Copyright (c) 2016, NORDUnet A/S All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the NORDUnet nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT
* HOLDER OR CONTRIBUTORS 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 <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h> /* close */
#include "hal.h"
#include "hal_internal.h"
static int fd;
hal_error_t hal_rpc_server_transport_init(void)
{
struct sockaddr_in sin;
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd == -1)
return perror("socket"), HAL_ERROR_RPC_TRANSPORT;
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sin.sin_port = 17425;
if (bind(fd, (const struct sockaddr *)&sin, sizeof(sin)) != 0)
return perror("bind"), HAL_ERROR_RPC_TRANSPORT;
return HAL_OK;
}
hal_error_t hal_rpc_server_transport_close(void)
{
if (close(fd) != 0)
return perror("close"), HAL_ERROR_RPC_TRANSPORT;
return HAL_OK;
}
hal_error_t hal_rpc_sendto(const uint8_t * const buf, const size_t len, void *opaque)
{
struct sockaddr_in *sin = (struct sockaddr_in *)opaque;
int ret;
if ((ret = sendto(fd, buf, len, 0, (struct sockaddr *)sin, sizeof(*sin))) == -1)
return perror("sendto"), HAL_ERROR_RPC_TRANSPORT;
return HAL_OK;
}
hal_error_t hal_rpc_recvfrom(uint8_t * const buf, size_t * const len, void **opaque)
{
static struct sockaddr_in sin;
socklen_t sin_len = sizeof(sin);
int ret;
if ((ret = recvfrom(fd, buf, *len, 0, (struct sockaddr *)&sin, &sin_len)) == -1)
return HAL_ERROR_RPC_TRANSPORT;
*opaque = (void *)&sin;
*len = ret;
return HAL_OK;
}
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