--- libaitrpc/src/blobcli.c 2015/07/02 17:52:53 1.1 +++ libaitrpc/src/blobcli.c 2015/07/02 22:28:15 1.2 @@ -0,0 +1,304 @@ +/************************************************************************* +* (C) 2015 AITNET ltd - Sofia/Bulgaria - +* by Michael Pounov +* +* $Author: misho $ +* $Id: blobcli.c,v 1.2 2015/07/02 22:28:15 misho Exp $ +* +************************************************************************** +The ELWIX and AITNET software is distributed under the following +terms: + +All of the documentation and software included in the ELWIX and AITNET +Releases is copyrighted by ELWIX - Sofia/Bulgaria + +Copyright 2004 - 2015 + by Michael Pounov . All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided 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. +3. All advertising materials mentioning features or use of this software + must display the following acknowledgement: +This product includes software developed by Michael Pounov +ELWIX - Embedded LightWeight unIX and its contributors. +4. Neither the name of AITNET 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 AITNET 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 REGENTS 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 "global.h" + + +/* + * rpc_cli_sendBLOB() - Send BLOB to server + * + * @cli = Client instance + * @var = BLOB variable + * @data = BLOB data + * @tout = BLOB live on server timeout in seconds, if =0 default timeout + * return: -1 error, 0 ok, 1 remote error + */ +int +rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, + void * __restrict data, int tout) +{ + int ret, len; + uint8_t *pos; + struct tagBLOBHdr hdr; + struct pollfd pfd; + + if (!cli || !var || !data) { + rpc_SetErr(EINVAL, "Invalid arguments"); + return -1; + } else + memset(&hdr, 0, sizeof hdr); + + rpc_addPktSession(&hdr.hdr_session, cli->cli_parent); + hdr.hdr_cmd = set; + hdr.hdr_var = 0; + hdr.hdr_ret = tout; + hdr.hdr_len = htonl(AIT_LEN(var)); + + /* send SET request */ + pfd.fd = cli->cli_sock; + pfd.events = POLLOUT; + if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 || + pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { + LOGERR; + return -1; + } + if (send(cli->cli_sock, &hdr, sizeof hdr, MSG_NOSIGNAL) == -1) { + LOGERR; + return -1; + } + + /* send BLOB to server */ + for (ret = AIT_LEN(var), pos = data; ret > 0; ret -= len, pos += len) + if ((len = send(cli->cli_sock, pos, ret, MSG_NOSIGNAL)) == -1) { + LOGERR; + return -1; + } + + /* wait for reply */ + pfd.events = POLLIN | POLLPRI; + if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 || + pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { + if (ret) + LOGERR; + else + rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond"); + return -1; + } + if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) { + LOGERR; + return 1; + } + + if (hdr.hdr_cmd != error) { + AIT_SET_BLOB(var, ntohl(hdr.hdr_var), ntohl(hdr.hdr_len)); + + if (ntohl(hdr.hdr_len) != AIT_LEN(var)) { + rpc_cli_delBLOB(cli, var); + AIT_NEW_BLOB(var, ntohl(hdr.hdr_len)); + + rpc_SetErr(ECANCELED, "Bad return length packet"); + return 1; + } + } + + return hdr.hdr_cmd == error; +} + +/* + * rpc_cli_recvBLOB() - Receive BLOB from server + * + * @cli = Client instance + * @var = BLOB variable + * @data = BLOB data, must be e_free after use! + * return: -1 error, 0 ok, 1 remote error + */ +int +rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data) +{ + int ret, len; + uint8_t *pos; + struct pollfd pfd; + struct tagBLOBHdr hdr; + + if (!cli || !var || !data) { + rpc_SetErr(EINVAL, "Invalid arguments"); + return -1; + } + + *data = e_malloc(AIT_LEN(var)); + if (!*data) { + LOGERR; + return -1; + } else { + memset(&hdr, 0, sizeof hdr); + memset(*data, 0, AIT_LEN(var)); + } + + rpc_addPktSession(&hdr.hdr_session, cli->cli_parent); + hdr.hdr_cmd = get; + hdr.hdr_var = htonl((uint32_t) AIT_GET_BLOB(var)); + hdr.hdr_ret = 0; + hdr.hdr_len = 0; + + /* send GET request */ + pfd.fd = cli->cli_sock; + pfd.events = POLLOUT; + if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 || + pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { + LOGERR; + e_free(*data); + *data = NULL; + return -1; + } + if (send(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) { + LOGERR; + e_free(*data); + *data = NULL; + return -1; + } + + /* receive BLOB from server */ + pfd.events = POLLIN | POLLPRI; + for (ret = AIT_LEN(var), pos = *data; ret > 0; ret -= len, pos += len) { + if ((len = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 || + pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { + LOGERR; + e_free(*data); + *data = NULL; + return -1; + } + + if ((len = recv(cli->cli_sock, pos, ret, 0)) == -1) { + LOGERR; + e_free(*data); + *data = NULL; + return -1; + } + } + + /* wait for reply */ + if ((len = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 || + pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { + if (len) + LOGERR; + else + rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond"); + e_free(*data); + *data = NULL; + return 1; + } + if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) { + LOGERR; + e_free(*data); + *data = NULL; + return 1; + } + if (hdr.hdr_cmd != error) { + if (ntohl(hdr.hdr_len) != AIT_LEN(var)) { + rpc_SetErr(ECANCELED, "Bad return length packet"); + e_free(*data); + *data = NULL; + return 1; + } + } + + return hdr.hdr_cmd == error; +} + +/* + * rpc_cli_delBLOB() - Delete BLOB from server + * + * @cli = Client instance + * @var = BLOB variable + * return: -1 error, 0 ok, 1 remote error + */ +int +rpc_cli_delBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var) +{ + struct tagBLOBHdr hdr; + struct pollfd pfd; + int ret; + + if (!cli || !var) { + rpc_SetErr(EINVAL, "Invalid arguments"); + return -1; + } else + memset(&hdr, 0, sizeof hdr); + + rpc_addPktSession(&hdr.hdr_session, cli->cli_parent); + hdr.hdr_cmd = unset; + hdr.hdr_var = htonl((uint32_t) AIT_GET_BLOB(var)); + hdr.hdr_ret = 0; + hdr.hdr_len = 0; + + /* send UNSET request */ + pfd.fd = cli->cli_sock; + pfd.events = POLLOUT; + if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 || + pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { + LOGERR; + return -1; + } + if (send(cli->cli_sock, &hdr, sizeof hdr, MSG_NOSIGNAL) == -1) { + LOGERR; + return -1; + } + + /* wait for reply */ + pfd.events = POLLIN | POLLPRI; + if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 || + pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { + if (ret) + LOGERR; + else + rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond"); + return 1; + } + if (recv(cli->cli_sock, &hdr, sizeof hdr, 0) == -1) { + LOGERR; + return 1; + } + + return hdr.hdr_cmd == error; +} + +/* + * rpc_cli_getBLOB() - Receive BLOB from server and Delete after that + * + * @cli = Client instance + * @var = BLOB variable + * @data = BLOB data, must be e_free after use! + * return: -1 error, 0 ok, 1 remote error + */ +int +rpc_cli_getBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data) +{ + int ret; + + ret = rpc_cli_recvBLOB(cli, var, data); + ret |= rpc_cli_delBLOB(cli, var) > 0 ? 2 : 0; + + return ret; +}