Annotation of libaitrpc/src/cli.c, revision 1.9.2.3
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 $
1.9.2.3 ! misho 6: * $Id: cli.c,v 1.9.2.2 2012/05/14 15:35:58 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:
1.9.2.2 misho 63: if (!rpccli) {
1.7 misho 64: rpc_SetErr(EINVAL, "Invalid parameters can`t connect to BLOB server");
1.2 misho 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:
1.4 misho 75: memcpy(&sa, &rpccli->cli_sa, sizeof sa);
1.6 misho 76: switch (sa.sa.sa_family) {
1.4 misho 77: case AF_INET:
1.6 misho 78: sa.sin.sin_port = htons(Port ? Port : ntohs(sa.sin.sin_port) + 1);
1.4 misho 79: break;
80: case AF_INET6:
1.6 misho 81: sa.sin6.sin6_port = htons(Port ? Port : ntohs(sa.sin6.sin6_port) + 1);
1.4 misho 82: break;
83: case AF_LOCAL:
1.6 misho 84: strlcat(sa.sun.sun_path, ".blob", sizeof sa.sun.sun_path);
1.4 misho 85: break;
1.9.2.3 ! misho 86: default:
! 87: rpc_SetErr(EINVAL, "Invalid socket type %d", sa.sa.sa_family);
! 88: return NULL;
1.2 misho 89: }
1.6 misho 90: memcpy(&cli->cli_sa, &sa, sizeof sa);
1.2 misho 91:
1.4 misho 92: /* connect to BLOB server */
1.6 misho 93: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
1.2 misho 94: if (cli->cli_sock == -1) {
95: LOGERR;
96: free(cli);
97: return NULL;
98: }
1.5 misho 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: }
1.6 misho 112: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.2 misho 113: LOGERR;
1.5 misho 114: close(cli->cli_sock);
1.2 misho 115: free(cli);
116: return NULL;
117: }
118:
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: }
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: /*
1.7 misho 146: * rpc_cli_openClient() - Connect to RPC Server
147: *
1.1 misho 148: * @ProgID = ProgramID for RPC session request
149: * @ProcID = ProcessID for RPC session request
1.5 misho 150: * @netBuf = Network buffer length, if =0 == BUFSIZ (also meaning max RPC packet)
1.7 misho 151: * @Timeout = RPC timeout in seconds, if =0 set default RPC timeout
1.1 misho 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 *
1.7 misho 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)
1.1 misho 160: {
161: rpc_cli_t *cli = NULL;
1.6 misho 162: io_sockaddr_t sa;
1.5 misho 163: int n;
1.1 misho 164:
1.9.2.1 misho 165: if (!io_gethostbyname(csHost, Port, &sa))
1.1 misho 166: return NULL;
167: if (!Port)
168: Port = RPC_DEFPORT;
1.5 misho 169: if (!netBuf)
170: netBuf = BUFSIZ;
1.7 misho 171: if (!Timeout)
172: Timeout = DEF_RPC_TIMEOUT;
1.1 misho 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));
1.5 misho 180:
181: cli->cli_netbuf = netBuf;
1.1 misho 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;
1.7 misho 189: ((rpc_sess_t*) cli->cli_parent)->sess_timeout = Timeout;
1.1 misho 190: ((rpc_sess_t*) cli->cli_parent)->sess_program = ProgID;
191: ((rpc_sess_t*) cli->cli_parent)->sess_process = ProcID;
192: }
193:
1.6 misho 194: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
1.4 misho 195:
196: /* connect to RPC server */
1.9.2.1 misho 197: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
1.1 misho 198: if (cli->cli_sock == -1) {
199: LOGERR;
200: free(cli->cli_parent);
201: free(cli);
202: return NULL;
203: }
1.5 misho 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: }
1.6 misho 219: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.1 misho 220: LOGERR;
1.5 misho 221: close(cli->cli_sock);
1.1 misho 222: free(cli->cli_parent);
223: free(cli);
224: return NULL;
225: }
226:
227: return cli;
228: }
229:
230: /*
1.7 misho 231: * rpc_cli_closeClient() - Close connection to RPC server and free resources
232: *
1.1 misho 233: * @cli = RPC Client session
234: * return: none
235: */
236: void
237: rpc_cli_closeClient(rpc_cli_t * __restrict cli)
238: {
239: if (!cli) {
1.7 misho 240: rpc_SetErr(EINVAL, "Can`t close connection because parameter is null!");
1.1 misho 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: /*
1.7 misho 255: * rpc_cli_execCall() - Execute RPC call
256: *
1.1 misho 257: * @cli = RPC Client session
1.8 misho 258: * @noreply = We not want RPC reply
1.1 misho 259: * @csModule = Module name, if NULL self binary
260: * @csFunc = Function name for execute
1.4 misho 261: * @in_vars = IN RPC call array of rpc values
1.5 misho 262: * @out_vars = OUT returned array of rpc values, must be free after use with rpc_cli_freeVals()
1.1 misho 263: * return: -1 error or != -1 ok result
264: */
265: int
1.8 misho 266: rpc_cli_execCall(rpc_cli_t *cli, int noreply, const char *csModule, const char *csFunc,
1.5 misho 267: array_t * __restrict in_vars, array_t ** __restrict out_vars)
1.1 misho 268: {
1.7 misho 269: u_char *buf;
270: rpc_func_t func;
1.5 misho 271: struct tagRPCCall *rpc;
1.7 misho 272: int ret = 0, wlen = sizeof(struct tagRPCCall);
1.8 misho 273: uint16_t tag, crc;
1.6 misho 274: uint32_t hash;
1.9 misho 275: struct pollfd pfd;
1.1 misho 276:
1.5 misho 277: if (!cli || !csFunc) {
1.7 misho 278: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
1.1 misho 279: return -1;
280: }
1.5 misho 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:
1.7 misho 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: }
1.1 misho 300:
1.4 misho 301: /* prepare RPC call */
1.5 misho 302: rpc = (struct tagRPCCall*) buf;
1.6 misho 303: rpc_addPktSession(&rpc->call_session, cli->cli_parent);
304: rpc->call_argc = htons(io_arraySize(in_vars));
1.7 misho 305: rpc->call_tag = tag;
306: rpc->call_hash = hash;
1.5 misho 307:
1.8 misho 308: /* set reply */
309: rpc->call_req.flags = noreply ? RPC_NOREPLY : RPC_REPLY;
310:
1.6 misho 311: if (io_arraySize(in_vars)) {
1.5 misho 312: /* marshaling variables */
1.7 misho 313: ret = io_vars2buffer(buf + wlen, cli->cli_netbuf - wlen, in_vars);
1.5 misho 314: if (ret == -1) {
1.7 misho 315: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
1.5 misho 316: free(buf);
1.7 misho 317: return -1;
1.3 misho 318: } else
1.7 misho 319: wlen += ret;
1.1 misho 320: }
1.4 misho 321:
1.8 misho 322: rpc->call_len = htons(wlen);
323:
1.7 misho 324: /* calculate CRC */
325: rpc->call_crc ^= rpc->call_crc;
1.8 misho 326: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
1.7 misho 327:
328: if ((ret = send(cli->cli_sock, buf, wlen, 0)) == -1) {
1.1 misho 329: LOGERR;
1.5 misho 330: free(buf);
1.1 misho 331: return -1;
1.7 misho 332: } else if (ret != wlen) {
333: rpc_SetErr(EPROCUNAVAIL, "RPC request, should be send %d bytes, "
334: "really sended %d bytes", wlen, ret);
1.5 misho 335: free(buf);
1.7 misho 336: return -1;
1.1 misho 337: }
338:
1.8 misho 339: if (noreply) {
340: /* we not want reply */
341: free(buf);
342: return 0;
343: }
344:
1.5 misho 345: /* reply from RPC server */
1.9 misho 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)) {
1.4 misho 350: if (ret)
1.1 misho 351: LOGERR;
1.4 misho 352: else
1.8 misho 353: rpc_SetErr(ETIMEDOUT, "Timeout, no return from RPC server?");
1.4 misho 354:
1.5 misho 355: free(buf);
1.1 misho 356: return -1;
357: }
1.5 misho 358: memset(buf, 0, cli->cli_netbuf);
359: if ((ret = recv(cli->cli_sock, buf, cli->cli_netbuf, 0)) == -1) {
1.1 misho 360: LOGERR;
1.5 misho 361: free(buf);
1.8 misho 362: return -1;
1.1 misho 363: }
1.5 misho 364: if (!ret) { /* receive EOF! */
365: free(buf);
1.1 misho 366: return 0;
1.5 misho 367: }
1.7 misho 368: if (ret < sizeof(struct tagRPCCall)) {
1.8 misho 369: rpc_SetErr(ERPCMISMATCH, "Too short RPC packet ...");
1.5 misho 370: free(buf);
1.8 misho 371: return -1;
1.7 misho 372: }
1.8 misho 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:
1.3 misho 383: /* check RPC packet session info */
1.7 misho 384: if (rpc_chkPktSession(&rpc->call_session, cli->cli_parent)) {
1.8 misho 385: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session ...");
1.5 misho 386: free(buf);
1.8 misho 387: return -1;
1.2 misho 388: } else
1.7 misho 389: wlen = sizeof(struct tagRPCCall);
390: if (rpc->call_tag != tag || rpc->call_hash != hash) {
1.8 misho 391: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply ...");
1.6 misho 392: free(buf);
1.8 misho 393: return -1;
1.6 misho 394: }
1.7 misho 395: if (ntohl(rpc->call_rep.ret) < 0 && ntohl(rpc->call_rep.eno)) {
1.8 misho 396: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
1.7 misho 397: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
398: strerror(ntohl(rpc->call_rep.eno)));
1.5 misho 399: free(buf);
1.8 misho 400: return -1;
1.1 misho 401: }
1.7 misho 402: if (ntohs(rpc->call_argc) * sizeof(ait_val_t) > cli->cli_netbuf - wlen) {
1.8 misho 403: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too long ...");
1.5 misho 404: free(buf);
1.8 misho 405: return -1;
1.5 misho 406: }
407:
408: /* RPC is OK! Go de-marshaling variables ... */
1.7 misho 409: if (ntohs(rpc->call_argc)) {
410: *out_vars = io_buffer2vars(buf + wlen, cli->cli_netbuf - wlen,
411: ntohs(rpc->call_argc), 0);
1.4 misho 412: if (!*out_vars) {
1.5 misho 413: free(buf);
1.1 misho 414: return -1;
1.5 misho 415: }
1.1 misho 416: }
417:
1.7 misho 418: ret = ntohl(rpc->call_rep.ret);
1.5 misho 419: free(buf);
420: return ret;
1.1 misho 421: }
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