From cef7ba6f7024a2c3a53760be8c5fc4f937e8efb5 Mon Sep 17 00:00:00 2001 From: Paul Selkirk Date: Thu, 25 Feb 2016 17:27:33 -0500 Subject: RPC over loopback socket, just to work out the mechanics for serialization and dispatch. --- rpc_client_loopback.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 rpc_client_loopback.c (limited to 'rpc_client_loopback.c') diff --git a/rpc_client_loopback.c b/rpc_client_loopback.c new file mode 100644 index 0000000..a3d7e73 --- /dev/null +++ b/rpc_client_loopback.c @@ -0,0 +1,85 @@ +/* + * rpc_client_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 +#include +#include +#include +#include /* close */ + +#include "hal.h" +#include "hal_internal.h" + +static int sock = -1; + +hal_error_t rpc_client_transport_init(void) +{ + struct sockaddr_in sin; + + sock = socket(AF_INET, SOCK_DGRAM, 0); + if (sock == -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 (connect(sock, (const struct sockaddr *)&sin, sizeof(sin)) != 0) + return perror("connect"), HAL_ERROR_RPC_TRANSPORT; + return HAL_OK; +} + +hal_error_t rpc_client_transport_close(void) +{ + int ret = close(sock); + sock = -1; + if (ret != 0) + return perror("close"), HAL_ERROR_RPC_TRANSPORT; + return HAL_OK; +} + +hal_error_t rpc_send(const uint8_t * const buf, const size_t len) +{ + if (send(sock, buf, len, 0) == -1) + return perror("send"), HAL_ERROR_RPC_TRANSPORT; + return HAL_OK; +} + +hal_error_t rpc_recv(uint8_t * const buf, size_t * const len) +{ + int ret; + + if ((ret = recv(sock, buf, *len, 0)) == -1) + return HAL_ERROR_RPC_TRANSPORT; + *len = ret; + return HAL_OK; +} -- cgit v1.2.3 ce4da 
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