libaitrpc/src/cli.c - diff

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Diff for /libaitrpc/src/cli.c between versions 1.6 and 1.21

version 1.6, 2011/11/03 15:32:21	version 1.21, 2013/12/15 23:01:02
Line 12 terms:	Line 12 terms:
All of the documentation and software included in the ELWIX and AITNET	All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>	Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>

Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011	Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
by Michael Pounov <misho@elwix.org>. All rights reserved.	by Michael Pounov <misho@elwix.org>. All rights reserved.

Redistribution and use in source and binary forms, with or without	Redistribution and use in source and binary forms, with or without
Line 47 SUCH DAMAGE.	Line 47 SUCH DAMAGE.


/*	/*
* rpc_cli_openBLOBClient() Connect to BLOB Server	* rpc_cli_openBLOBClient() - Connect to BLOB Server
	*
* @rpccli = RPC Client session	* @rpccli = RPC Client session
* @Port = Port for bind server, if Port == 0 default port is selected	* @Port = Port for bind server, if Port == 0 default port is selected
* return: NULL == error or !=NULL connection to BLOB server established	* return: NULL == error or !=NULL connection to BLOB server established
Line 56 rpc_cli_t *	Line 57 rpc_cli_t *
rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, u_short Port)	rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, u_short Port)
{	{
rpc_cli_t *cli = NULL;	rpc_cli_t *cli = NULL;
io_sockaddr_t sa;
int n;	int n;

if (!rpccli \|\|	if (!rpccli) {
(rpccli->cli_sa.sa.sa_family != AF_INET && rpccli->cli_sa.sa.sa_family != AF_INET6 &&	rpc_SetErr(EINVAL, "Invalid parameters can`t connect to BLOB server");
rpccli->cli_sa.sa.sa_family != AF_LOCAL)) {
rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t connect to BLOB server ...\n");
return NULL;	return NULL;
}	}

cli = malloc(sizeof(rpc_cli_t));	cli = e_malloc(sizeof(rpc_cli_t));
if (!cli) {	if (!cli) {
LOGERR;	LOGERR;
return NULL;	return NULL;
} else	} else
memcpy(cli, rpccli, sizeof(rpc_cli_t));	memcpy(cli, rpccli, sizeof(rpc_cli_t));

memcpy(&sa, &rpccli->cli_sa, sizeof sa);	memcpy(&cli->cli_sa, &rpccli->cli_sa, sizeof(sockaddr_t));
switch (sa.sa.sa_family) {	switch (cli->cli_sa.sa.sa_family) {
case AF_INET:	case AF_INET:
sa.sin.sin_port = htons(Port ? Port : ntohs(sa.sin.sin_port) + 1);	cli->cli_sa.sin.sin_port =
	htons(Port ? Port : ntohs(cli->cli_sa.sin.sin_port) + 1);
break;	break;
case AF_INET6:	case AF_INET6:
sa.sin6.sin6_port = htons(Port ? Port : ntohs(sa.sin6.sin6_port) + 1);	cli->cli_sa.sin6.sin6_port =
	htons(Port ? Port : ntohs(cli->cli_sa.sin6.sin6_port) + 1);
break;	break;
case AF_LOCAL:	case AF_LOCAL:
strlcat(sa.sun.sun_path, ".blob", sizeof sa.sun.sun_path);	strlcat(cli->cli_sa.sun.sun_path, ".blob", sizeof cli->cli_sa.sun.sun_path);
break;	break;
	default:
	rpc_SetErr(EINVAL, "Invalid socket type %d", cli->cli_sa.sa.sa_family);
	return NULL;
}	}
memcpy(&cli->cli_sa, &sa, sizeof sa);

	AIT_COPY_VAL(&cli->cli_buf, &rpccli->cli_buf);
	n = AIT_LEN(&cli->cli_buf);

/* connect to BLOB server */	/* connect to BLOB server */
cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);	cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
if (cli->cli_sock == -1) {	if (cli->cli_sock == -1) {
LOGERR;	LOGERR;
free(cli);	e_free(cli);
return NULL;	return NULL;
}	}
n = cli->cli_netbuf;
if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {	if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
LOGERR;	LOGERR;
close(cli->cli_sock);	close(cli->cli_sock);
free(cli);	e_free(cli);
return NULL;	return NULL;
}	}
if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {	if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
LOGERR;	LOGERR;
close(cli->cli_sock);	close(cli->cli_sock);
free(cli);	e_free(cli);
return NULL;	return NULL;
}	}
if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {	if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
LOGERR;	LOGERR;
close(cli->cli_sock);	close(cli->cli_sock);
free(cli);	e_free(cli);
return NULL;	return NULL;
}	} else
	fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) \| O_NONBLOCK);

return cli;	return cli;
}	}

/*	/*
* rpc_cli_closeBLOBClient() Close connection to BLOB server and free resources	* rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
	*
* @cli = BLOB Client session	* @cli = BLOB Client session
* return: none	* return: none
*/	*/
void	void
rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli)	rpc_cli_closeBLOBClient(rpc_cli_t ** __restrict cli)
{	{
if (!cli) {	if (!cli \|\| !*cli)
rpc_SetErr(EINVAL, "Error:: Can`t close connection because parameter is null!\n");
return;	return;
}

shutdown(cli->cli_sock, SHUT_RDWR);	shutdown((*cli)->cli_sock, SHUT_RDWR);
close(cli->cli_sock);	close((*cli)->cli_sock);

free(cli);	AIT_FREE_VAL(&(*cli)->cli_buf);
cli = NULL;
	e_free(*cli);
	*cli = NULL;
}	}

// --------------------------------------------------------------	/* -------------------------------------------------------------- */

/*	/*
* rpc_cli_openClient() Connect to RPC Server	* rpc_cli_openClient() - Connect to RPC Server
* @ProgID = ProgramID for RPC session request	*
* @ProcID = ProcessID for RPC session request	* @InstID = InstID for RPC session request
* @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)	* @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
* @family = Family socket type, AF_INET or AF_INET6
* @csHost = Host name or IP address for bind server	* @csHost = Host name or IP address for bind server
* @Port = Port for bind server, if Port == 0 default port is selected	* @Port = Port for bind server, if Port == 0 default port is selected
	* @proto = Protocol, if == 0 choose SOCK_STREAM
* return: NULL == error or !=NULL connection to RPC server established	* return: NULL == error or !=NULL connection to RPC server established
*/	*/
rpc_cli_t *	rpc_cli_t *
rpc_cli_openClient(u_int ProgID, u_int ProcID, int netBuf, u_short family, const char *csHost, u_short Port)	rpc_cli_openClient(u_char InstID, int netBuf, const char *csHost, u_short Port, int proto)
{	{
rpc_cli_t *cli = NULL;	rpc_cli_t *cli = NULL;
struct hostent *host = NULL;	sockaddr_t sa = E_SOCKADDR_INIT;
io_sockaddr_t sa;
int n;

if (!csHost \|\| (family != AF_INET && family != AF_INET6 && family != AF_LOCAL)) {	if (!e_gethostbyname(csHost, Port, &sa))
rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t connect to RPC server ...\n");
return NULL;	return NULL;
}
if (!Port)	if (!Port)
Port = RPC_DEFPORT;	Port = RPC_DEFPORT;
if (!netBuf)	if (!proto)
	proto = SOCK_STREAM;
	if (netBuf < RPC_MIN_BUFSIZ)
netBuf = BUFSIZ;	netBuf = BUFSIZ;
if (csHost && family != AF_LOCAL) {	else
host = gethostbyname2(csHost, family);	netBuf = E_ALIGN(netBuf, 2); /* align netBuf length */
if (!host) {
rpc_SetErr(h_errno, "Error:: %s\n", hstrerror(h_errno));
return NULL;
}
}
memset(&sa, 0, sizeof sa);
sa.sa.sa_family = family;
switch (family) {
case AF_INET:
sa.sin.sin_len = sizeof(struct sockaddr_in);
sa.sin.sin_port = htons(Port);
if (csHost)
memcpy(&sa.sin.sin_addr, host->h_addr, host->h_length);
break;
case AF_INET6:
sa.sin6.sin6_len = sizeof(struct sockaddr_in6);
sa.sin6.sin6_port = htons(Port);
if (csHost)
memcpy(&sa.sin6.sin6_addr, host->h_addr, host->h_length);
break;
case AF_LOCAL:
sa.sun.sun_len = sizeof(struct sockaddr_un);
if (csHost)
strlcpy(sa.sun.sun_path, csHost, sizeof sa.sun.sun_path);
break;
default:
rpc_SetErr(EINVAL, "Error:: Invalid parameters can`t connect to RPC server ...\n");
return NULL;
}

cli = malloc(sizeof(rpc_cli_t));	cli = e_malloc(sizeof(rpc_cli_t));
if (!cli) {	if (!cli) {
LOGERR;	LOGERR;
return NULL;	return NULL;
} else	} else
memset(cli, 0, sizeof(rpc_cli_t));	memset(cli, 0, sizeof(rpc_cli_t));

cli->cli_netbuf = netBuf;	/* build session */
cli->cli_parent = malloc(sizeof(rpc_sess_t));	cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
if (!cli->cli_parent) {	if (!cli->cli_parent) {
LOGERR;	LOGERR;
free(cli);	e_free(cli);
return NULL;	return NULL;
} else {	} else {
((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;	((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
((rpc_sess_t*) cli->cli_parent)->sess_program = ProgID;	((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
((rpc_sess_t*) cli->cli_parent)->sess_process = ProcID;
}	}

	cli->cli_id = proto;
memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);	memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
	AIT_SET_BUFSIZ(&cli->cli_buf, 0, netBuf);

/* connect to RPC server */	/* connect to RPC server */
cli->cli_sock = socket(family, SOCK_STREAM, 0);	cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id, 0);
if (cli->cli_sock == -1) {	if (cli->cli_sock == -1) {
LOGERR;	LOGERR;
free(cli->cli_parent);	goto err;
free(cli);
return NULL;
}	}
n = cli->cli_netbuf;	if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {	&netBuf, sizeof netBuf) == -1) {
LOGERR;	LOGERR;
	goto err;
	}
	if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
	&netBuf, sizeof netBuf) == -1) {
	LOGERR;
	goto err;
	}
	if (cli->cli_id == SOCK_STREAM)
	if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
	LOGERR;
	goto err;
	}

	fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) \| O_NONBLOCK);
	return cli;
	err:
	AIT_FREE_VAL(&cli->cli_buf);
	if (cli->cli_sock > 2)
close(cli->cli_sock);	close(cli->cli_sock);
free(cli->cli_parent);	e_free(cli->cli_parent);
free(cli);	e_free(cli);
return NULL;	return NULL;
	}

	/*
	* rpc_cli_reconnectClient() - Reconnecting client to RPC server
	*
	* @cli = RPC Client session
	* return: -1 error or 0 ok
	*/
	int
	rpc_cli_reconnectClient(rpc_cli_t * __restrict cli)
	{
	int netBuf;

	if (!cli)
	return -1;
	else
	netBuf = AIT_LEN(&cli->cli_buf);

	close(cli->cli_sock);

	cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id, 0);
	if (cli->cli_sock == -1) {
	LOGERR;
	return -1;
}	}
if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {	if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
	&netBuf, sizeof netBuf) == -1) {
LOGERR;	LOGERR;
close(cli->cli_sock);	close(cli->cli_sock);
free(cli->cli_parent);	return -1;
free(cli);
return NULL;
}	}
if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {	if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
	&netBuf, sizeof netBuf) == -1) {
LOGERR;	LOGERR;
close(cli->cli_sock);	close(cli->cli_sock);
free(cli->cli_parent);	return -1;
free(cli);
return NULL;
}	}
	if (cli->cli_id == SOCK_STREAM)
	if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
	LOGERR;
	close(cli->cli_sock);
	return -1;
	}

return cli;	fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) \| O_NONBLOCK);
	return 0;
}	}

/*	/*
* rpc_cli_closeClient() Close connection to RPC server and free resources	* rpc_cli_closeClient() - Close connection to RPC server and free resources
	*
* @cli = RPC Client session	* @cli = RPC Client session
* return: none	* return: none
*/	*/
void	void
rpc_cli_closeClient(rpc_cli_t * __restrict cli)	rpc_cli_closeClient(rpc_cli_t ** __restrict cli)
{	{
if (!cli) {	if (!cli \|\| !*cli)
rpc_SetErr(EINVAL, "Error:: Can`t close connection because parameter is null!\n");
return;	return;
}

shutdown(cli->cli_sock, SHUT_RDWR);	if ((*cli)->cli_id == SOCK_STREAM)
close(cli->cli_sock);	shutdown((*cli)->cli_sock, SHUT_RDWR);
	close((*cli)->cli_sock);

if (cli->cli_parent)	AIT_FREE_VAL(&(*cli)->cli_buf);
free(cli->cli_parent);
free(cli);	if ((*cli)->cli_parent)
cli = NULL;	e_free((*cli)->cli_parent);

	e_free(*cli);
	*cli = NULL;
}	}

	/*
	* rpc_pkt_Send() - Send RPC packet
	*
	* @sock = Socket
	* @type = Type of socket
	* @sa = Server address
	* @pkt = RPC packet
	* @len = Length of packet
	* return: -1 error, 0 EOF or >0 sended bytes
	*/
	int
	rpc_pkt_Send(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt, int len)
	{
	u_char *buf;

	if (!pkt) {
	rpc_SetErr(EINVAL, "Invalid argument(s)!");
	return -1;
	} else
	buf = AIT_GET_BUF(pkt);

	return rpc_Write(sock, type, MSG_NOSIGNAL, sa, buf, len);
	}

/*	/*
* rpc_cli_execCall() Execute RPC call	* rpc_pkt_Receive() - Receive RPC packet
* @cli = RPC Client session	*
* @csModule = Module name, if NULL self binary	* @sock = Socket
* @csFunc = Function name for execute	* @type = Type of socket
* @in_vars = IN RPC call array of rpc values	* @sa = Server address
* @out_vars = OUT returned array of rpc values, must be free after use with rpc_cli_freeVals()	* @pkt = RPC packet
* return: -1 error or != -1 ok result	* return: -1 error, 0 EOF or >0 received bytes
*/	*/
int	int
rpc_cli_execCall(rpc_cli_t cli, const char csModule, const char *csFunc,	rpc_pkt_Receive(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt)
array_t * __restrict in_vars, array_t ** __restrict out_vars)
{	{
fd_set fds;	int ret, estlen = 0, blen = sizeof(struct tagRPCCall);
u_char *buf, str[MAXPATHLEN + UCHAR_MAX + 1];	u_char *buf;
struct tagRPCCall *rpc;	struct tagRPCCall *rpc;
struct tagRPCRet *rrpc = NULL;
int ret = 0, Limit = 0;
struct timeval tv = { DEF_RPC_TIMEOUT, 0 };
uint16_t tag;
uint32_t hash;

if (!cli \|\| !csFunc) {	if (!pkt) {
rpc_SetErr(EINVAL, "Error:: Can`t execute call because parameter is null or invalid!\n");	rpc_SetErr(EINVAL, "Invalid argument(s)!");
return -1;	return -1;
	} else {
	buf = AIT_GET_BUF(pkt);
	rpc = (struct tagRPCCall*) buf;
}	}
if (out_vars)
*out_vars = NULL;

buf = malloc(cli->cli_netbuf);	/* reply from RPC server */
if (!buf) {	do {
LOGERR;	if (type == SOCK_STREAM)
	ret = rpc_Read(sock, type, !estlen ? MSG_PEEK : 0, NULL, buf, blen);
	else
	ret = rpc_Read(sock, type, !estlen ? MSG_PEEK : 0, sa, buf, blen);
	if (ret < 1)
	return ret;

	/* check for response from known address */
	if (!estlen) {
	/* 1st read for RPC header */
	if (ret < sizeof(struct tagRPCCall)) {
	rpc_SetErr(ERPCMISMATCH, "Short RPC packet %d bytes", ret);
	return -1;
	}

	/* calc estimated length */
	estlen = ntohl(rpc->call_len);
	if (estlen > AIT_LEN(pkt))
	AIT_RE_BUF(pkt, estlen);
	buf = AIT_GET_BUF(pkt);
	rpc = (struct tagRPCCall*) buf;
	blen = estlen;
	continue;
	}

	/* compiler optimize loop if while(0) and stop working 'continue' on some platforms */
	break;
	} while (42);

	if (ret < sizeof(struct tagRPCCall) \|\| estlen != ret) {
	rpc_SetErr(ERPCMISMATCH, "RPC packet mismatch estimate %d bytes, but received %d\n",
	estlen, ret);
return -1;	return -1;
} else	}
memset(buf, 0, cli->cli_netbuf);

/* build RPC call string for hash */	return ret;
memset(str, 0, sizeof str);	}
if (csModule)
strlcpy((char*) str, csModule, sizeof str);
strlcat((char*) str, "__", sizeof str);
strlcat((char*) str, csFunc, sizeof str);

	/*
	* rpc_pkt_Request() - Build RPC Request packet
	*
	* @pkt = Packet buffer
	* @sess = RPC session info
	* @tag = Function tag for execution
	* @vars = Function argument array of values, may be NULL
	* @noreply = We not want RPC reply
	* @nocrc = Without CRC calculation
	* return: -1 error or != -1 prepared bytes into packet
	*/
	int
	rpc_pkt_Request(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
	array_t * __restrict vars, int noreply, int nocrc)
	{
	struct tagRPCCall *rpc;
	int ret = 0, estlen, len = sizeof(struct tagRPCCall);
	u_char *buf;

	if (!pkt \|\| !sess) {
	rpc_SetErr(EINVAL, "Invalid argument(s)!");
	return -1;
	}

	/* calc estimated length */
	estlen = ait_resideVars(vars) + len;
	if (estlen > AIT_LEN(pkt))
	AIT_RE_BUF(pkt, estlen);
	buf = AIT_GET_BUF(pkt);

/* prepare RPC call */	/* prepare RPC call */
rpc = (struct tagRPCCall*) buf;	rpc = (struct tagRPCCall*) buf;
rpc_addPktSession(&rpc->call_session, cli->cli_parent);	rpc_addPktSession(&rpc->call_session, sess);
rpc->call_argc = htons(io_arraySize(in_vars));	rpc->call_tag = htons(tag);
rpc->call_tag = tag = htons(crcFletcher16((u_short*) str, sizeof str / 2));	if (!vars)
rpc->call_hash = hash = htonl(hash_fnv((char*) str, sizeof str));	rpc->call_argc = 0;
Limit = sizeof(struct tagRPCCall);	else
	rpc->call_argc = htons(array_Size(vars));

if (io_arraySize(in_vars)) {	/* set reply */
	rpc->call_req.flags = (uint64_t) htonl(noreply ? RPC_NOREPLY : RPC_REPLY);

	if (array_Size(vars)) {
/* marshaling variables */	/* marshaling variables */
ret = io_vars2buffer(buf + Limit, cli->cli_netbuf - Limit, in_vars);	ret = ait_vars2buffer(buf + len, AIT_LEN(pkt) - len, vars);
if (ret == -1) {	if (ret == -1) {
rpc_SetErr(EBADRPC, "Error:: in prepare RPC packet values (-7) ...\n");	rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
free(buf);	return -1;
return -7;
} else	} else
Limit += ret;	len += ret;
}	}

if ((ret = send(cli->cli_sock, buf, Limit, 0)) == -1) {	/* total packet length */
LOGERR;	rpc->call_len = htonl(len);
free(buf);
return -1;	if (!nocrc) {
	/* calculate CRC */
	rpc->call_crc ^= rpc->call_crc;
	rpc->call_crc = htons(crcFletcher16((u_short*) buf, len / 2));
}	}
if (ret != Limit) {
rpc_SetErr(EPROCUNAVAIL, "Error:: in send RPC request, should be send %d bytes, really is %d\n",
Limit, ret);
free(buf);
return -9;
}

/* reply from RPC server */	return len;
FD_ZERO(&fds);	}
FD_SET(cli->cli_sock, &fds);
if ((ret = select(cli->cli_sock + 1, &fds, NULL, NULL, &tv)) < 1) {
if (ret)
LOGERR;
else
rpc_SetErr(ETIMEDOUT, "Error:: timeout, no return from RPC server?\n");

free(buf);	/*
	* rpc_pkt_Replay() - Decode RPC Replay packet
	*
	* @pkt = Packet buffer
	* @sess = RPC session info
	* @tag = Function tag
	* @vars = Function argument array of values, may be NULL
	* @nocrc = Without CRC calculation
	* return: -1 error or != -1 return value from function
	*/
	int
	rpc_pkt_Replay(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
	array_t ** __restrict vars, int nocrc)
	{
	struct tagRPCCall *rpc;
	int len;
	u_char *buf;
	uint16_t crc;

	if (!pkt \|\| !sess) {
	rpc_SetErr(EINVAL, "Invalid argument(s)!");
return -1;	return -1;
	} else
	buf = AIT_GET_BUF(pkt);

	rpc = (struct tagRPCCall*) buf;
	if (!nocrc) {
	/* calculate CRC */
	crc = ntohs(rpc->call_crc);
	rpc->call_crc ^= rpc->call_crc;
	if (crc != crcFletcher16((u_short*) buf, ntohl(rpc->call_len) / 2)) {
	rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
	return -1;
	}
}	}
memset(buf, 0, cli->cli_netbuf);
if ((ret = recv(cli->cli_sock, buf, cli->cli_netbuf, 0)) == -1) {	/* check RPC packet session info */
LOGERR;	if (rpc_chkPktSession(&rpc->call_session, sess)) {
free(buf);	rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
return -3;	return -1;
}	}
if (!ret) { /* receive EOF! */	if (ntohs(rpc->call_tag) != tag) {
free(buf);	rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply");
return 0;	return -1;
}	}
if (ret < sizeof(struct tagRPCRet)) {	if (ntohl(rpc->call_rep.eno) && ntohl(rpc->call_rep.ret) == -1) {
rpc_SetErr(ERPCMISMATCH, "Error:: too short RPC packet ...\n");	rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
free(buf);	ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
return -4;	strerror(ntohl(rpc->call_rep.eno)));
} else	return -1;
rrpc = (struct tagRPCRet*) buf;
/* check RPC packet session info */
if (rpc_chkPktSession(&rrpc->ret_session, cli->cli_parent)) {
rpc_SetErr(ERPCMISMATCH, "Error:: get invalid RPC session ...\n");
free(buf);
return -5;
} else
Limit = sizeof(struct tagRPCRet);
if (rrpc->ret_tag != tag \|\| rrpc->ret_hash != hash) {
rpc_SetErr(ERPCMISMATCH, "Error:: get wrong RPC reply ...\n");
free(buf);
return -5;
}	}
if (ntohl(rrpc->ret_retcode) < 0 && ntohl(rrpc->ret_errno)) {	len = ntohs(rpc->call_argc) * sizeof(ait_val_t);
rpc_SetErr(ntohl(rrpc->ret_errno), "Error::Server side: retcode=%d #%d %s\n",	if (len > AIT_LEN(pkt) - sizeof(struct tagRPCCall)) {
ntohl(rrpc->ret_retcode), ntohl(rrpc->ret_errno),	rpc_SetErr(EMSGSIZE, "Reply RPC packet not enough buffer space ...");
strerror(ntohl(rrpc->ret_errno)));	return -1;
free(buf);
return -6;
}	}
if (ntohs(rrpc->ret_argc) * sizeof(ait_val_t) > cli->cli_netbuf - Limit) {	if (len > ntohl(rpc->call_len) - sizeof(struct tagRPCCall)) {
rpc_SetErr(EMSGSIZE, "Error:: reply RPC packet is too long ...\n");	rpc_SetErr(EMSGSIZE, "Reply RPC packet is too short ...");
free(buf);	return -1;
return -7;
}	}

/* RPC is OK! Go de-marshaling variables ... */	/* RPC is OK! Go de-marshaling variables ... */
if (ntohs(rrpc->ret_argc)) {	if (vars && ntohs(rpc->call_argc)) {
*out_vars = io_buffer2vars(buf + Limit, cli->cli_netbuf - Limit,	#ifdef CLI_RES_ZCOPY
ntohs(rrpc->ret_argc), 0);	*vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
if (!*out_vars) {	ntohs(rpc->call_argc), 42);
free(buf);	#else
	*vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
	ntohs(rpc->call_argc), 0);
	#endif
	if (!*vars) {
	rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
return -1;	return -1;
}	}
}	}

ret = ntohl(rrpc->ret_retcode);	return ntohl(rpc->call_rep.ret);
free(buf);	}

	/*
	* rpc_cli_execCall() - Execute RPC call
	*
	* @cli = RPC Client session
	* @noreply = We not want RPC reply
	* @tag = Function tag for execution
	* @in_vars = IN function argument array of values, may be NULL
	* @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with ait_freeVars()
	* return: -1 error, 0 ok result or 1 closed rpc connection
	*/
	int
	rpc_cli_execCall(rpc_cli_t *cli, int noreply, u_short tag,
	array_t * __restrict in_vars, array_t ** __restrict out_vars)
	{
	int type = 0, wlen;
	u_char *buf;

	if (!cli) {
	rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
	return -1;
	} else {
	if (cli->cli_id == SOCK_STREAM)
	type = cli->cli_id;
	buf = AIT_GET_BUF(&cli->cli_buf);
	}
	if (out_vars)
	*out_vars = NULL;

	if ((wlen = rpc_pkt_Request(&cli->cli_buf, cli->cli_parent, tag, in_vars, noreply, type)) == -1)
	return -1;

	if ((wlen = rpc_pkt_Send(cli->cli_sock, cli->cli_id, &cli->cli_sa, &cli->cli_buf, wlen)) == -1)
	return -1;
	if (!wlen) /* closed rpc connection */
	return 1;

	if (noreply) /* we not want reply */
	return 0;

	if ((wlen = rpc_pkt_Receive(cli->cli_sock, cli->cli_id, &cli->cli_sa, &cli->cli_buf)) == -1)
	return -1;
	if (!wlen) /* closed rpc connection */
	return 1;

	if ((wlen = rpc_pkt_Replay(&cli->cli_buf, cli->cli_parent, tag, out_vars, type)) == -1)
	return -1;

	return 0;
	}

	/*
	* rpc_cli_freeCall() - Free resouce allocated by RPC call
	*
	* @out_vars = Returned array with variables from RPC call
	* return: none
	*/
	void
	rpc_cli_freeCall(array_t ** __restrict out_vars)
	{
	#ifdef CLI_RES_ZCOPY
	array_Destroy(out_vars);
	#else
	ait_freeVars(out_vars);
	#endif
	}

	/*
	* rpc_cli_ping() - Ping RPC server
	*
	* @cli = connected client
	* return: -1 error or !=-1 ping seq id
	*/
	int
	rpc_cli_ping(rpc_cli_t *cli)
	{
	int ret = 0;
	array_t *arr = NULL;

	if (!cli)
	return -1;

	if (rpc_cli_execCall(cli, RPC_REPLY, CALL_SRVPING, NULL, &arr))
	return -1;
	else
	ret = AIT_GET_U16(array(arr, 0, ait_val_t*));
	rpc_cli_freeCall(&arr);

return ret;	return ret;
}	}

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	Added in v.1.21