Annotation of libaitrpc/src/cli.c, revision 1.9.2.1
1.1 misho 1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.9.2.1 ! misho 6: * $Id: cli.c,v 1.9 2012/05/14 08:39:05 misho Exp $
1.1 misho 7: *
1.2 misho 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:
1.7 misho 15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
1.2 misho 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: */
1.1 misho 46: #include "global.h"
47:
48:
49: /*
1.7 misho 50: * rpc_cli_openBLOBClient() - Connect to BLOB Server
51: *
1.2 misho 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;
1.6 misho 60: io_sockaddr_t sa;
1.5 misho 61: int n;
1.4 misho 62:
63: if (!rpccli ||
1.6 misho 64: (rpccli->cli_sa.sa.sa_family != AF_INET && rpccli->cli_sa.sa.sa_family != AF_INET6 &&
65: rpccli->cli_sa.sa.sa_family != AF_LOCAL)) {
1.7 misho 66: rpc_SetErr(EINVAL, "Invalid parameters can`t connect to BLOB server");
1.2 misho 67: return NULL;
68: }
69:
70: cli = malloc(sizeof(rpc_cli_t));
71: if (!cli) {
72: LOGERR;
73: return NULL;
74: } else
75: memcpy(cli, rpccli, sizeof(rpc_cli_t));
76:
1.4 misho 77: memcpy(&sa, &rpccli->cli_sa, sizeof sa);
1.6 misho 78: switch (sa.sa.sa_family) {
1.4 misho 79: case AF_INET:
1.6 misho 80: sa.sin.sin_port = htons(Port ? Port : ntohs(sa.sin.sin_port) + 1);
1.4 misho 81: break;
82: case AF_INET6:
1.6 misho 83: sa.sin6.sin6_port = htons(Port ? Port : ntohs(sa.sin6.sin6_port) + 1);
1.4 misho 84: break;
85: case AF_LOCAL:
1.6 misho 86: strlcat(sa.sun.sun_path, ".blob", sizeof sa.sun.sun_path);
1.4 misho 87: break;
1.2 misho 88: }
1.6 misho 89: memcpy(&cli->cli_sa, &sa, sizeof sa);
1.2 misho 90:
1.4 misho 91: /* connect to BLOB server */
1.6 misho 92: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
1.2 misho 93: if (cli->cli_sock == -1) {
94: LOGERR;
95: free(cli);
96: return NULL;
97: }
1.5 misho 98: n = cli->cli_netbuf;
99: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
100: LOGERR;
101: close(cli->cli_sock);
102: free(cli);
103: return NULL;
104: }
105: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
106: LOGERR;
107: close(cli->cli_sock);
108: free(cli);
109: return NULL;
110: }
1.6 misho 111: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.2 misho 112: LOGERR;
1.5 misho 113: close(cli->cli_sock);
1.2 misho 114: free(cli);
115: return NULL;
116: }
117:
1.9.2.1 ! misho 118: cli->cli_kill = enable;
1.2 misho 119: return cli;
120: }
121:
122: /*
1.7 misho 123: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
124: *
1.2 misho 125: * @cli = BLOB Client session
126: * return: none
127: */
128: void
129: rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli)
130: {
131: if (!cli) {
1.7 misho 132: rpc_SetErr(EINVAL, "Can`t close connection because parameter is null!");
1.2 misho 133: return;
134: }
1.9.2.1 ! misho 135: cli->cli_kill = disable;
1.2 misho 136:
137: shutdown(cli->cli_sock, SHUT_RDWR);
138: close(cli->cli_sock);
139:
140: free(cli);
141: cli = NULL;
142: }
143:
144: // --------------------------------------------------------------
145:
146: /*
1.7 misho 147: * rpc_cli_openClient() - Connect to RPC Server
148: *
1.1 misho 149: * @ProgID = ProgramID for RPC session request
150: * @ProcID = ProcessID for RPC session request
1.5 misho 151: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
1.7 misho 152: * @Timeout = RPC timeout in seconds, if =0 set default RPC timeout
1.1 misho 153: * @family = Family socket type, AF_INET or AF_INET6
154: * @csHost = Host name or IP address for bind server
155: * @Port = Port for bind server, if Port == 0 default port is selected
156: * return: NULL == error or !=NULL connection to RPC server established
157: */
158: rpc_cli_t *
1.7 misho 159: rpc_cli_openClient(u_int ProgID, u_int ProcID, int netBuf, u_char Timeout,
160: u_short family, const char *csHost, u_short Port)
1.1 misho 161: {
162: rpc_cli_t *cli = NULL;
1.6 misho 163: io_sockaddr_t sa;
1.5 misho 164: int n;
1.1 misho 165:
1.9.2.1 ! misho 166: if (!io_gethostbyname(csHost, Port, &sa))
1.1 misho 167: return NULL;
168: if (!Port)
169: Port = RPC_DEFPORT;
1.5 misho 170: if (!netBuf)
171: netBuf = BUFSIZ;
1.7 misho 172: if (!Timeout)
173: Timeout = DEF_RPC_TIMEOUT;
1.1 misho 174:
175: cli = malloc(sizeof(rpc_cli_t));
176: if (!cli) {
177: LOGERR;
178: return NULL;
179: } else
180: memset(cli, 0, sizeof(rpc_cli_t));
1.5 misho 181:
182: cli->cli_netbuf = netBuf;
1.1 misho 183: cli->cli_parent = malloc(sizeof(rpc_sess_t));
184: if (!cli->cli_parent) {
185: LOGERR;
186: free(cli);
187: return NULL;
188: } else {
189: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
1.7 misho 190: ((rpc_sess_t*) cli->cli_parent)->sess_timeout = Timeout;
1.1 misho 191: ((rpc_sess_t*) cli->cli_parent)->sess_program = ProgID;
192: ((rpc_sess_t*) cli->cli_parent)->sess_process = ProcID;
193: }
194:
1.6 misho 195: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
1.4 misho 196:
197: /* connect to RPC server */
1.9.2.1 ! misho 198: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
1.1 misho 199: if (cli->cli_sock == -1) {
200: LOGERR;
201: free(cli->cli_parent);
202: free(cli);
203: return NULL;
204: }
1.5 misho 205: n = cli->cli_netbuf;
206: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
207: LOGERR;
208: close(cli->cli_sock);
209: free(cli->cli_parent);
210: free(cli);
211: return NULL;
212: }
213: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
214: LOGERR;
215: close(cli->cli_sock);
216: free(cli->cli_parent);
217: free(cli);
218: return NULL;
219: }
1.6 misho 220: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.1 misho 221: LOGERR;
1.5 misho 222: close(cli->cli_sock);
1.1 misho 223: free(cli->cli_parent);
224: free(cli);
225: return NULL;
226: }
227:
228: return cli;
229: }
230:
231: /*
1.7 misho 232: * rpc_cli_closeClient() - Close connection to RPC server and free resources
233: *
1.1 misho 234: * @cli = RPC Client session
235: * return: none
236: */
237: void
238: rpc_cli_closeClient(rpc_cli_t * __restrict cli)
239: {
240: if (!cli) {
1.7 misho 241: rpc_SetErr(EINVAL, "Can`t close connection because parameter is null!");
1.1 misho 242: return;
243: }
244:
245: shutdown(cli->cli_sock, SHUT_RDWR);
246: close(cli->cli_sock);
247:
248: if (cli->cli_parent)
249: free(cli->cli_parent);
250: free(cli);
251: cli = NULL;
252: }
253:
254:
255: /*
1.7 misho 256: * rpc_cli_execCall() - Execute RPC call
257: *
1.1 misho 258: * @cli = RPC Client session
1.8 misho 259: * @noreply = We not want RPC reply
1.1 misho 260: * @csModule = Module name, if NULL self binary
261: * @csFunc = Function name for execute
1.4 misho 262: * @in_vars = IN RPC call array of rpc values
1.5 misho 263: * @out_vars = OUT returned array of rpc values, must be free after use with rpc_cli_freeVals()
1.1 misho 264: * return: -1 error or != -1 ok result
265: */
266: int
1.8 misho 267: rpc_cli_execCall(rpc_cli_t *cli, int noreply, const char *csModule, const char *csFunc,
1.5 misho 268: array_t * __restrict in_vars, array_t ** __restrict out_vars)
1.1 misho 269: {
1.7 misho 270: u_char *buf;
271: rpc_func_t func;
1.5 misho 272: struct tagRPCCall *rpc;
1.7 misho 273: int ret = 0, wlen = sizeof(struct tagRPCCall);
1.8 misho 274: uint16_t tag, crc;
1.6 misho 275: uint32_t hash;
1.9 misho 276: struct pollfd pfd;
1.1 misho 277:
1.5 misho 278: if (!cli || !csFunc) {
1.7 misho 279: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
1.1 misho 280: return -1;
281: }
1.5 misho 282: if (out_vars)
283: *out_vars = NULL;
284:
285: buf = malloc(cli->cli_netbuf);
286: if (!buf) {
287: LOGERR;
288: return -1;
289: } else
290: memset(buf, 0, cli->cli_netbuf);
291:
1.7 misho 292: /* calculate hashes */
293: if (rpc_calcHashes(&func, csModule, csFunc) == -1)
294: return -1;
295: else {
296: tag = htons(func.func_tag);
297: hash = htonl(func.func_hash);
298: AIT_FREE_VAL(&func.func_name);
299: AIT_FREE_VAL(&func.func_file);
300: }
1.1 misho 301:
1.4 misho 302: /* prepare RPC call */
1.5 misho 303: rpc = (struct tagRPCCall*) buf;
1.6 misho 304: rpc_addPktSession(&rpc->call_session, cli->cli_parent);
305: rpc->call_argc = htons(io_arraySize(in_vars));
1.7 misho 306: rpc->call_tag = tag;
307: rpc->call_hash = hash;
1.5 misho 308:
1.8 misho 309: /* set reply */
310: rpc->call_req.flags = noreply ? RPC_NOREPLY : RPC_REPLY;
311:
1.6 misho 312: if (io_arraySize(in_vars)) {
1.5 misho 313: /* marshaling variables */
1.7 misho 314: ret = io_vars2buffer(buf + wlen, cli->cli_netbuf - wlen, in_vars);
1.5 misho 315: if (ret == -1) {
1.7 misho 316: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
1.5 misho 317: free(buf);
1.7 misho 318: return -1;
1.3 misho 319: } else
1.7 misho 320: wlen += ret;
1.1 misho 321: }
1.4 misho 322:
1.8 misho 323: rpc->call_len = htons(wlen);
324:
1.7 misho 325: /* calculate CRC */
326: rpc->call_crc ^= rpc->call_crc;
1.8 misho 327: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
1.7 misho 328:
329: if ((ret = send(cli->cli_sock, buf, wlen, 0)) == -1) {
1.1 misho 330: LOGERR;
1.5 misho 331: free(buf);
1.1 misho 332: return -1;
1.7 misho 333: } else if (ret != wlen) {
334: rpc_SetErr(EPROCUNAVAIL, "RPC request, should be send %d bytes, "
335: "really sended %d bytes", wlen, ret);
1.5 misho 336: free(buf);
1.7 misho 337: return -1;
1.1 misho 338: }
339:
1.8 misho 340: if (noreply) {
341: /* we not want reply */
342: free(buf);
343: return 0;
344: }
345:
1.5 misho 346: /* reply from RPC server */
1.9 misho 347: pfd.fd = cli->cli_sock;
348: pfd.events = POLLIN | POLLPRI;
349: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 ||
350: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
1.4 misho 351: if (ret)
1.1 misho 352: LOGERR;
1.4 misho 353: else
1.8 misho 354: rpc_SetErr(ETIMEDOUT, "Timeout, no return from RPC server?");
1.4 misho 355:
1.5 misho 356: free(buf);
1.1 misho 357: return -1;
358: }
1.5 misho 359: memset(buf, 0, cli->cli_netbuf);
360: if ((ret = recv(cli->cli_sock, buf, cli->cli_netbuf, 0)) == -1) {
1.1 misho 361: LOGERR;
1.5 misho 362: free(buf);
1.8 misho 363: return -1;
1.1 misho 364: }
1.5 misho 365: if (!ret) { /* receive EOF! */
366: free(buf);
1.1 misho 367: return 0;
1.5 misho 368: }
1.7 misho 369: if (ret < sizeof(struct tagRPCCall)) {
1.8 misho 370: rpc_SetErr(ERPCMISMATCH, "Too short RPC packet ...");
1.5 misho 371: free(buf);
1.8 misho 372: return -1;
1.7 misho 373: }
1.8 misho 374:
375: /* calculate CRC */
376: crc = ntohs(rpc->call_crc);
377: rpc->call_crc ^= rpc->call_crc;
378: if (crc != crcFletcher16((u_short*) buf, ret / 2)) {
379: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
380: free(buf);
381: return -1;
382: }
383:
1.3 misho 384: /* check RPC packet session info */
1.7 misho 385: if (rpc_chkPktSession(&rpc->call_session, cli->cli_parent)) {
1.8 misho 386: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session ...");
1.5 misho 387: free(buf);
1.8 misho 388: return -1;
1.2 misho 389: } else
1.7 misho 390: wlen = sizeof(struct tagRPCCall);
391: if (rpc->call_tag != tag || rpc->call_hash != hash) {
1.8 misho 392: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply ...");
1.6 misho 393: free(buf);
1.8 misho 394: return -1;
1.6 misho 395: }
1.7 misho 396: if (ntohl(rpc->call_rep.ret) < 0 && ntohl(rpc->call_rep.eno)) {
1.8 misho 397: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
1.7 misho 398: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
399: strerror(ntohl(rpc->call_rep.eno)));
1.5 misho 400: free(buf);
1.8 misho 401: return -1;
1.1 misho 402: }
1.7 misho 403: if (ntohs(rpc->call_argc) * sizeof(ait_val_t) > cli->cli_netbuf - wlen) {
1.8 misho 404: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too long ...");
1.5 misho 405: free(buf);
1.8 misho 406: return -1;
1.5 misho 407: }
408:
409: /* RPC is OK! Go de-marshaling variables ... */
1.7 misho 410: if (ntohs(rpc->call_argc)) {
411: *out_vars = io_buffer2vars(buf + wlen, cli->cli_netbuf - wlen,
412: ntohs(rpc->call_argc), 0);
1.4 misho 413: if (!*out_vars) {
1.5 misho 414: free(buf);
1.1 misho 415: return -1;
1.5 misho 416: }
1.1 misho 417: }
418:
1.7 misho 419: ret = ntohl(rpc->call_rep.ret);
1.5 misho 420: free(buf);
421: return ret;
1.1 misho 422: }
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