1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: cli.c,v 1.9.2.3 2012/05/15 16:06:13 misho Exp $
7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #include "global.h"
47:
48:
49: /*
50: * rpc_cli_openBLOBClient() - Connect to BLOB Server
51: *
52: * @rpccli = RPC Client session
53: * @Port = Port for bind server, if Port == 0 default port is selected
54: * return: NULL == error or !=NULL connection to BLOB server established
55: */
56: rpc_cli_t *
57: rpc_cli_openBLOBClient(rpc_cli_t * __restrict rpccli, u_short Port)
58: {
59: rpc_cli_t *cli = NULL;
60: io_sockaddr_t sa;
61: int n;
62:
63: if (!rpccli) {
64: rpc_SetErr(EINVAL, "Invalid parameters can`t connect to BLOB server");
65: return NULL;
66: }
67:
68: cli = malloc(sizeof(rpc_cli_t));
69: if (!cli) {
70: LOGERR;
71: return NULL;
72: } else
73: memcpy(cli, rpccli, sizeof(rpc_cli_t));
74:
75: memcpy(&sa, &rpccli->cli_sa, sizeof sa);
76: switch (sa.sa.sa_family) {
77: case AF_INET:
78: sa.sin.sin_port = htons(Port ? Port : ntohs(sa.sin.sin_port) + 1);
79: break;
80: case AF_INET6:
81: sa.sin6.sin6_port = htons(Port ? Port : ntohs(sa.sin6.sin6_port) + 1);
82: break;
83: case AF_LOCAL:
84: strlcat(sa.sun.sun_path, ".blob", sizeof sa.sun.sun_path);
85: break;
86: default:
87: rpc_SetErr(EINVAL, "Invalid socket type %d", sa.sa.sa_family);
88: return NULL;
89: }
90: memcpy(&cli->cli_sa, &sa, sizeof sa);
91:
92: /* connect to BLOB server */
93: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
94: if (cli->cli_sock == -1) {
95: LOGERR;
96: free(cli);
97: return NULL;
98: }
99: n = cli->cli_netbuf;
100: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
101: LOGERR;
102: close(cli->cli_sock);
103: free(cli);
104: return NULL;
105: }
106: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
107: LOGERR;
108: close(cli->cli_sock);
109: free(cli);
110: return NULL;
111: }
112: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
113: LOGERR;
114: close(cli->cli_sock);
115: free(cli);
116: return NULL;
117: }
118:
119: return cli;
120: }
121:
122: /*
123: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
124: *
125: * @cli = BLOB Client session
126: * return: none
127: */
128: void
129: rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli)
130: {
131: if (!cli) {
132: rpc_SetErr(EINVAL, "Can`t close connection because parameter is null!");
133: return;
134: }
135:
136: shutdown(cli->cli_sock, SHUT_RDWR);
137: close(cli->cli_sock);
138:
139: free(cli);
140: cli = NULL;
141: }
142:
143: // --------------------------------------------------------------
144:
145: /*
146: * rpc_cli_openClient() - Connect to RPC Server
147: *
148: * @ProgID = ProgramID for RPC session request
149: * @ProcID = ProcessID for RPC session request
150: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
151: * @Timeout = RPC timeout in seconds, if =0 set default RPC timeout
152: * @family = Family socket type, AF_INET or AF_INET6
153: * @csHost = Host name or IP address for bind server
154: * @Port = Port for bind server, if Port == 0 default port is selected
155: * return: NULL == error or !=NULL connection to RPC server established
156: */
157: rpc_cli_t *
158: rpc_cli_openClient(u_int ProgID, u_int ProcID, int netBuf, u_char Timeout,
159: u_short family, const char *csHost, u_short Port)
160: {
161: rpc_cli_t *cli = NULL;
162: io_sockaddr_t sa;
163: int n;
164:
165: if (!io_gethostbyname(csHost, Port, &sa))
166: return NULL;
167: if (!Port)
168: Port = RPC_DEFPORT;
169: if (!netBuf)
170: netBuf = BUFSIZ;
171: if (!Timeout)
172: Timeout = DEF_RPC_TIMEOUT;
173:
174: cli = malloc(sizeof(rpc_cli_t));
175: if (!cli) {
176: LOGERR;
177: return NULL;
178: } else
179: memset(cli, 0, sizeof(rpc_cli_t));
180:
181: cli->cli_netbuf = netBuf;
182: cli->cli_parent = malloc(sizeof(rpc_sess_t));
183: if (!cli->cli_parent) {
184: LOGERR;
185: free(cli);
186: return NULL;
187: } else {
188: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
189: ((rpc_sess_t*) cli->cli_parent)->sess_timeout = Timeout;
190: ((rpc_sess_t*) cli->cli_parent)->sess_program = ProgID;
191: ((rpc_sess_t*) cli->cli_parent)->sess_process = ProcID;
192: }
193:
194: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
195:
196: /* connect to RPC server */
197: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
198: if (cli->cli_sock == -1) {
199: LOGERR;
200: free(cli->cli_parent);
201: free(cli);
202: return NULL;
203: }
204: n = cli->cli_netbuf;
205: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
206: LOGERR;
207: close(cli->cli_sock);
208: free(cli->cli_parent);
209: free(cli);
210: return NULL;
211: }
212: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
213: LOGERR;
214: close(cli->cli_sock);
215: free(cli->cli_parent);
216: free(cli);
217: return NULL;
218: }
219: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
220: LOGERR;
221: close(cli->cli_sock);
222: free(cli->cli_parent);
223: free(cli);
224: return NULL;
225: }
226:
227: return cli;
228: }
229:
230: /*
231: * rpc_cli_closeClient() - Close connection to RPC server and free resources
232: *
233: * @cli = RPC Client session
234: * return: none
235: */
236: void
237: rpc_cli_closeClient(rpc_cli_t * __restrict cli)
238: {
239: if (!cli) {
240: rpc_SetErr(EINVAL, "Can`t close connection because parameter is null!");
241: return;
242: }
243:
244: shutdown(cli->cli_sock, SHUT_RDWR);
245: close(cli->cli_sock);
246:
247: if (cli->cli_parent)
248: free(cli->cli_parent);
249: free(cli);
250: cli = NULL;
251: }
252:
253:
254: /*
255: * rpc_cli_execCall() - Execute RPC call
256: *
257: * @cli = RPC Client session
258: * @noreply = We not want RPC reply
259: * @csModule = Module name, if NULL self binary
260: * @csFunc = Function name for execute
261: * @in_vars = IN RPC call array of rpc values
262: * @out_vars = OUT returned array of rpc values, must be free after use with rpc_cli_freeVals()
263: * return: -1 error or != -1 ok result
264: */
265: int
266: rpc_cli_execCall(rpc_cli_t *cli, int noreply, const char *csModule, const char *csFunc,
267: array_t * __restrict in_vars, array_t ** __restrict out_vars)
268: {
269: u_char *buf;
270: rpc_func_t func;
271: struct tagRPCCall *rpc;
272: int ret = 0, wlen = sizeof(struct tagRPCCall);
273: uint16_t tag, crc;
274: uint32_t hash;
275: struct pollfd pfd;
276:
277: if (!cli || !csFunc) {
278: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
279: return -1;
280: }
281: if (out_vars)
282: *out_vars = NULL;
283:
284: buf = malloc(cli->cli_netbuf);
285: if (!buf) {
286: LOGERR;
287: return -1;
288: } else
289: memset(buf, 0, cli->cli_netbuf);
290:
291: /* calculate hashes */
292: if (rpc_calcHashes(&func, csModule, csFunc) == -1)
293: return -1;
294: else {
295: tag = htons(func.func_tag);
296: hash = htonl(func.func_hash);
297: AIT_FREE_VAL(&func.func_name);
298: AIT_FREE_VAL(&func.func_file);
299: }
300:
301: /* prepare RPC call */
302: rpc = (struct tagRPCCall*) buf;
303: rpc_addPktSession(&rpc->call_session, cli->cli_parent);
304: rpc->call_argc = htons(io_arraySize(in_vars));
305: rpc->call_tag = tag;
306: rpc->call_hash = hash;
307:
308: /* set reply */
309: rpc->call_req.flags = noreply ? RPC_NOREPLY : RPC_REPLY;
310:
311: if (io_arraySize(in_vars)) {
312: /* marshaling variables */
313: ret = io_vars2buffer(buf + wlen, cli->cli_netbuf - wlen, in_vars);
314: if (ret == -1) {
315: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
316: free(buf);
317: return -1;
318: } else
319: wlen += ret;
320: }
321:
322: rpc->call_len = htons(wlen);
323:
324: /* calculate CRC */
325: rpc->call_crc ^= rpc->call_crc;
326: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
327:
328: if ((ret = send(cli->cli_sock, buf, wlen, 0)) == -1) {
329: LOGERR;
330: free(buf);
331: return -1;
332: } else if (ret != wlen) {
333: rpc_SetErr(EPROCUNAVAIL, "RPC request, should be send %d bytes, "
334: "really sended %d bytes", wlen, ret);
335: free(buf);
336: return -1;
337: }
338:
339: if (noreply) {
340: /* we not want reply */
341: free(buf);
342: return 0;
343: }
344:
345: /* reply from RPC server */
346: pfd.fd = cli->cli_sock;
347: pfd.events = POLLIN | POLLPRI;
348: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 ||
349: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
350: if (ret)
351: LOGERR;
352: else
353: rpc_SetErr(ETIMEDOUT, "Timeout, no return from RPC server?");
354:
355: free(buf);
356: return -1;
357: }
358: memset(buf, 0, cli->cli_netbuf);
359: if ((ret = recv(cli->cli_sock, buf, cli->cli_netbuf, 0)) == -1) {
360: LOGERR;
361: free(buf);
362: return -1;
363: }
364: if (!ret) { /* receive EOF! */
365: free(buf);
366: return 0;
367: }
368: if (ret < sizeof(struct tagRPCCall)) {
369: rpc_SetErr(ERPCMISMATCH, "Too short RPC packet ...");
370: free(buf);
371: return -1;
372: }
373:
374: /* calculate CRC */
375: crc = ntohs(rpc->call_crc);
376: rpc->call_crc ^= rpc->call_crc;
377: if (crc != crcFletcher16((u_short*) buf, ret / 2)) {
378: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
379: free(buf);
380: return -1;
381: }
382:
383: /* check RPC packet session info */
384: if (rpc_chkPktSession(&rpc->call_session, cli->cli_parent)) {
385: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session ...");
386: free(buf);
387: return -1;
388: } else
389: wlen = sizeof(struct tagRPCCall);
390: if (rpc->call_tag != tag || rpc->call_hash != hash) {
391: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply ...");
392: free(buf);
393: return -1;
394: }
395: if (ntohl(rpc->call_rep.ret) < 0 && ntohl(rpc->call_rep.eno)) {
396: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
397: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
398: strerror(ntohl(rpc->call_rep.eno)));
399: free(buf);
400: return -1;
401: }
402: if (ntohs(rpc->call_argc) * sizeof(ait_val_t) > cli->cli_netbuf - wlen) {
403: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too long ...");
404: free(buf);
405: return -1;
406: }
407:
408: /* RPC is OK! Go de-marshaling variables ... */
409: if (ntohs(rpc->call_argc)) {
410: *out_vars = io_buffer2vars(buf + wlen, cli->cli_netbuf - wlen,
411: ntohs(rpc->call_argc), 0);
412: if (!*out_vars) {
413: free(buf);
414: return -1;
415: }
416: }
417:
418: ret = ntohl(rpc->call_rep.ret);
419: free(buf);
420: return ret;
421: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to cli.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / libaitrpc / src