Annotation of libaitrpc/src/cli.c, revision 1.9
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 ! misho 6: * $Id: cli.c,v 1.8.2.1 2012/05/11 12:53:35 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:
118: return cli;
119: }
120:
121: /*
1.7 misho 122: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
123: *
1.2 misho 124: * @cli = BLOB Client session
125: * return: none
126: */
127: void
128: rpc_cli_closeBLOBClient(rpc_cli_t * __restrict cli)
129: {
130: if (!cli) {
1.7 misho 131: rpc_SetErr(EINVAL, "Can`t close connection because parameter is null!");
1.2 misho 132: return;
133: }
134:
135: shutdown(cli->cli_sock, SHUT_RDWR);
136: close(cli->cli_sock);
137:
138: free(cli);
139: cli = NULL;
140: }
141:
142: // --------------------------------------------------------------
143:
144: /*
1.7 misho 145: * rpc_cli_openClient() - Connect to RPC Server
146: *
1.1 misho 147: * @ProgID = ProgramID for RPC session request
148: * @ProcID = ProcessID for RPC session request
1.5 misho 149: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
1.7 misho 150: * @Timeout = RPC timeout in seconds, if =0 set default RPC timeout
1.1 misho 151: * @family = Family socket type, AF_INET or AF_INET6
152: * @csHost = Host name or IP address for bind server
153: * @Port = Port for bind server, if Port == 0 default port is selected
154: * return: NULL == error or !=NULL connection to RPC server established
155: */
156: rpc_cli_t *
1.7 misho 157: rpc_cli_openClient(u_int ProgID, u_int ProcID, int netBuf, u_char Timeout,
158: u_short family, const char *csHost, u_short Port)
1.1 misho 159: {
160: rpc_cli_t *cli = NULL;
161: struct hostent *host = NULL;
1.6 misho 162: io_sockaddr_t sa;
1.5 misho 163: int n;
1.1 misho 164:
1.4 misho 165: if (!csHost || (family != AF_INET && family != AF_INET6 && family != AF_LOCAL)) {
1.8 misho 166: rpc_SetErr(EINVAL, "Invalid parameters can`t connect to RPC server ...");
1.1 misho 167: return NULL;
168: }
169: if (!Port)
170: Port = RPC_DEFPORT;
1.5 misho 171: if (!netBuf)
172: netBuf = BUFSIZ;
1.7 misho 173: if (!Timeout)
174: Timeout = DEF_RPC_TIMEOUT;
1.4 misho 175: if (csHost && family != AF_LOCAL) {
1.1 misho 176: host = gethostbyname2(csHost, family);
177: if (!host) {
1.8 misho 178: rpc_SetErr(h_errno, "%s", hstrerror(h_errno));
1.1 misho 179: return NULL;
180: }
181: }
1.4 misho 182: memset(&sa, 0, sizeof sa);
1.6 misho 183: sa.sa.sa_family = family;
1.1 misho 184: switch (family) {
185: case AF_INET:
1.6 misho 186: sa.sin.sin_len = sizeof(struct sockaddr_in);
187: sa.sin.sin_port = htons(Port);
1.1 misho 188: if (csHost)
1.6 misho 189: memcpy(&sa.sin.sin_addr, host->h_addr, host->h_length);
1.1 misho 190: break;
191: case AF_INET6:
1.6 misho 192: sa.sin6.sin6_len = sizeof(struct sockaddr_in6);
193: sa.sin6.sin6_port = htons(Port);
1.1 misho 194: if (csHost)
1.6 misho 195: memcpy(&sa.sin6.sin6_addr, host->h_addr, host->h_length);
1.4 misho 196: break;
197: case AF_LOCAL:
1.6 misho 198: sa.sun.sun_len = sizeof(struct sockaddr_un);
1.4 misho 199: if (csHost)
1.6 misho 200: strlcpy(sa.sun.sun_path, csHost, sizeof sa.sun.sun_path);
1.1 misho 201: break;
202: default:
1.8 misho 203: rpc_SetErr(EINVAL, "Invalid parameters can`t connect to RPC server ...");
1.1 misho 204: return NULL;
205: }
206:
207: cli = malloc(sizeof(rpc_cli_t));
208: if (!cli) {
209: LOGERR;
210: return NULL;
211: } else
212: memset(cli, 0, sizeof(rpc_cli_t));
1.5 misho 213:
214: cli->cli_netbuf = netBuf;
1.1 misho 215: cli->cli_parent = malloc(sizeof(rpc_sess_t));
216: if (!cli->cli_parent) {
217: LOGERR;
218: free(cli);
219: return NULL;
220: } else {
221: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
1.7 misho 222: ((rpc_sess_t*) cli->cli_parent)->sess_timeout = Timeout;
1.1 misho 223: ((rpc_sess_t*) cli->cli_parent)->sess_program = ProgID;
224: ((rpc_sess_t*) cli->cli_parent)->sess_process = ProcID;
225: }
226:
1.6 misho 227: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
1.4 misho 228:
229: /* connect to RPC server */
1.1 misho 230: cli->cli_sock = socket(family, SOCK_STREAM, 0);
231: if (cli->cli_sock == -1) {
232: LOGERR;
233: free(cli->cli_parent);
234: free(cli);
235: return NULL;
236: }
1.5 misho 237: n = cli->cli_netbuf;
238: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
239: LOGERR;
240: close(cli->cli_sock);
241: free(cli->cli_parent);
242: free(cli);
243: return NULL;
244: }
245: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
246: LOGERR;
247: close(cli->cli_sock);
248: free(cli->cli_parent);
249: free(cli);
250: return NULL;
251: }
1.6 misho 252: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.1 misho 253: LOGERR;
1.5 misho 254: close(cli->cli_sock);
1.1 misho 255: free(cli->cli_parent);
256: free(cli);
257: return NULL;
258: }
259:
260: return cli;
261: }
262:
263: /*
1.7 misho 264: * rpc_cli_closeClient() - Close connection to RPC server and free resources
265: *
1.1 misho 266: * @cli = RPC Client session
267: * return: none
268: */
269: void
270: rpc_cli_closeClient(rpc_cli_t * __restrict cli)
271: {
272: if (!cli) {
1.7 misho 273: rpc_SetErr(EINVAL, "Can`t close connection because parameter is null!");
1.1 misho 274: return;
275: }
276:
277: shutdown(cli->cli_sock, SHUT_RDWR);
278: close(cli->cli_sock);
279:
280: if (cli->cli_parent)
281: free(cli->cli_parent);
282: free(cli);
283: cli = NULL;
284: }
285:
286:
287: /*
1.7 misho 288: * rpc_cli_execCall() - Execute RPC call
289: *
1.1 misho 290: * @cli = RPC Client session
1.8 misho 291: * @noreply = We not want RPC reply
1.1 misho 292: * @csModule = Module name, if NULL self binary
293: * @csFunc = Function name for execute
1.4 misho 294: * @in_vars = IN RPC call array of rpc values
1.5 misho 295: * @out_vars = OUT returned array of rpc values, must be free after use with rpc_cli_freeVals()
1.1 misho 296: * return: -1 error or != -1 ok result
297: */
298: int
1.8 misho 299: rpc_cli_execCall(rpc_cli_t *cli, int noreply, const char *csModule, const char *csFunc,
1.5 misho 300: array_t * __restrict in_vars, array_t ** __restrict out_vars)
1.1 misho 301: {
1.7 misho 302: u_char *buf;
303: rpc_func_t func;
1.5 misho 304: struct tagRPCCall *rpc;
1.7 misho 305: int ret = 0, wlen = sizeof(struct tagRPCCall);
1.8 misho 306: uint16_t tag, crc;
1.6 misho 307: uint32_t hash;
1.9 ! misho 308: struct pollfd pfd;
1.1 misho 309:
1.5 misho 310: if (!cli || !csFunc) {
1.7 misho 311: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
1.1 misho 312: return -1;
313: }
1.5 misho 314: if (out_vars)
315: *out_vars = NULL;
316:
317: buf = malloc(cli->cli_netbuf);
318: if (!buf) {
319: LOGERR;
320: return -1;
321: } else
322: memset(buf, 0, cli->cli_netbuf);
323:
1.7 misho 324: /* calculate hashes */
325: if (rpc_calcHashes(&func, csModule, csFunc) == -1)
326: return -1;
327: else {
328: tag = htons(func.func_tag);
329: hash = htonl(func.func_hash);
330: AIT_FREE_VAL(&func.func_name);
331: AIT_FREE_VAL(&func.func_file);
332: }
1.1 misho 333:
1.4 misho 334: /* prepare RPC call */
1.5 misho 335: rpc = (struct tagRPCCall*) buf;
1.6 misho 336: rpc_addPktSession(&rpc->call_session, cli->cli_parent);
337: rpc->call_argc = htons(io_arraySize(in_vars));
1.7 misho 338: rpc->call_tag = tag;
339: rpc->call_hash = hash;
1.5 misho 340:
1.8 misho 341: /* set reply */
342: rpc->call_req.flags = noreply ? RPC_NOREPLY : RPC_REPLY;
343:
1.6 misho 344: if (io_arraySize(in_vars)) {
1.5 misho 345: /* marshaling variables */
1.7 misho 346: ret = io_vars2buffer(buf + wlen, cli->cli_netbuf - wlen, in_vars);
1.5 misho 347: if (ret == -1) {
1.7 misho 348: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
1.5 misho 349: free(buf);
1.7 misho 350: return -1;
1.3 misho 351: } else
1.7 misho 352: wlen += ret;
1.1 misho 353: }
1.4 misho 354:
1.8 misho 355: rpc->call_len = htons(wlen);
356:
1.7 misho 357: /* calculate CRC */
358: rpc->call_crc ^= rpc->call_crc;
1.8 misho 359: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
1.7 misho 360:
361: if ((ret = send(cli->cli_sock, buf, wlen, 0)) == -1) {
1.1 misho 362: LOGERR;
1.5 misho 363: free(buf);
1.1 misho 364: return -1;
1.7 misho 365: } else if (ret != wlen) {
366: rpc_SetErr(EPROCUNAVAIL, "RPC request, should be send %d bytes, "
367: "really sended %d bytes", wlen, ret);
1.5 misho 368: free(buf);
1.7 misho 369: return -1;
1.1 misho 370: }
371:
1.8 misho 372: if (noreply) {
373: /* we not want reply */
374: free(buf);
375: return 0;
376: }
377:
1.5 misho 378: /* reply from RPC server */
1.9 ! misho 379: pfd.fd = cli->cli_sock;
! 380: pfd.events = POLLIN | POLLPRI;
! 381: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 ||
! 382: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
1.4 misho 383: if (ret)
1.1 misho 384: LOGERR;
1.4 misho 385: else
1.8 misho 386: rpc_SetErr(ETIMEDOUT, "Timeout, no return from RPC server?");
1.4 misho 387:
1.5 misho 388: free(buf);
1.1 misho 389: return -1;
390: }
1.5 misho 391: memset(buf, 0, cli->cli_netbuf);
392: if ((ret = recv(cli->cli_sock, buf, cli->cli_netbuf, 0)) == -1) {
1.1 misho 393: LOGERR;
1.5 misho 394: free(buf);
1.8 misho 395: return -1;
1.1 misho 396: }
1.5 misho 397: if (!ret) { /* receive EOF! */
398: free(buf);
1.1 misho 399: return 0;
1.5 misho 400: }
1.7 misho 401: if (ret < sizeof(struct tagRPCCall)) {
1.8 misho 402: rpc_SetErr(ERPCMISMATCH, "Too short RPC packet ...");
1.5 misho 403: free(buf);
1.8 misho 404: return -1;
1.7 misho 405: }
1.8 misho 406:
407: /* calculate CRC */
408: crc = ntohs(rpc->call_crc);
409: rpc->call_crc ^= rpc->call_crc;
410: if (crc != crcFletcher16((u_short*) buf, ret / 2)) {
411: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
412: free(buf);
413: return -1;
414: }
415:
1.3 misho 416: /* check RPC packet session info */
1.7 misho 417: if (rpc_chkPktSession(&rpc->call_session, cli->cli_parent)) {
1.8 misho 418: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session ...");
1.5 misho 419: free(buf);
1.8 misho 420: return -1;
1.2 misho 421: } else
1.7 misho 422: wlen = sizeof(struct tagRPCCall);
423: if (rpc->call_tag != tag || rpc->call_hash != hash) {
1.8 misho 424: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply ...");
1.6 misho 425: free(buf);
1.8 misho 426: return -1;
1.6 misho 427: }
1.7 misho 428: if (ntohl(rpc->call_rep.ret) < 0 && ntohl(rpc->call_rep.eno)) {
1.8 misho 429: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
1.7 misho 430: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
431: strerror(ntohl(rpc->call_rep.eno)));
1.5 misho 432: free(buf);
1.8 misho 433: return -1;
1.1 misho 434: }
1.7 misho 435: if (ntohs(rpc->call_argc) * sizeof(ait_val_t) > cli->cli_netbuf - wlen) {
1.8 misho 436: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too long ...");
1.5 misho 437: free(buf);
1.8 misho 438: return -1;
1.5 misho 439: }
440:
441: /* RPC is OK! Go de-marshaling variables ... */
1.7 misho 442: if (ntohs(rpc->call_argc)) {
443: *out_vars = io_buffer2vars(buf + wlen, cli->cli_netbuf - wlen,
444: ntohs(rpc->call_argc), 0);
1.4 misho 445: if (!*out_vars) {
1.5 misho 446: free(buf);
1.1 misho 447: return -1;
1.5 misho 448: }
1.1 misho 449: }
450:
1.7 misho 451: ret = ntohl(rpc->call_rep.ret);
1.5 misho 452: free(buf);
453: return ret;
1.1 misho 454: }
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