Annotation of libaitrpc/src/cli.c, revision 1.9.2.12
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 $
1.9.2.12! misho 6: * $Id: cli.c,v 1.9.2.11 2012/05/17 15:21:08 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;
1.4 misho 60:
1.9.2.2 misho 61: if (!rpccli) {
1.7 misho 62: rpc_SetErr(EINVAL, "Invalid parameters can`t connect to BLOB server");
1.2 misho 63: return NULL;
64: }
65:
66: cli = malloc(sizeof(rpc_cli_t));
67: if (!cli) {
68: LOGERR;
69: return NULL;
70: } else
71: memcpy(cli, rpccli, sizeof(rpc_cli_t));
72:
1.9.2.4 misho 73: memcpy(&cli->cli_sa, &rpccli->cli_sa, sizeof(io_sockaddr_t));
74: switch (cli->cli_sa.sa.sa_family) {
1.4 misho 75: case AF_INET:
1.9.2.4 misho 76: cli->cli_sa.sin.sin_port =
77: htons(Port ? Port : ntohs(cli->cli_sa.sin.sin_port) + 1);
1.4 misho 78: break;
79: case AF_INET6:
1.9.2.4 misho 80: cli->cli_sa.sin6.sin6_port =
81: htons(Port ? Port : ntohs(cli->cli_sa.sin6.sin6_port) + 1);
1.4 misho 82: break;
83: case AF_LOCAL:
1.9.2.4 misho 84: strlcat(cli->cli_sa.sun.sun_path, ".blob", sizeof cli->cli_sa.sun.sun_path);
1.4 misho 85: break;
1.9.2.3 misho 86: default:
1.9.2.4 misho 87: rpc_SetErr(EINVAL, "Invalid socket type %d", cli->cli_sa.sa.sa_family);
1.9.2.3 misho 88: return NULL;
1.2 misho 89: }
90:
1.9.2.6 misho 91: AIT_COPY_VAL(&cli->cli_buf, &rpccli->cli_buf);
92:
1.4 misho 93: /* connect to BLOB server */
1.6 misho 94: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
1.2 misho 95: if (cli->cli_sock == -1) {
96: LOGERR;
97: free(cli);
98: return NULL;
99: }
1.6 misho 100: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.2 misho 101: LOGERR;
1.5 misho 102: close(cli->cli_sock);
1.2 misho 103: free(cli);
104: return NULL;
1.9.2.12! misho 105: } /*else
1.9.2.10 misho 106: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
1.9.2.12! misho 107: */
1.2 misho 108:
109: return cli;
110: }
111:
112: /*
1.7 misho 113: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
114: *
1.2 misho 115: * @cli = BLOB Client session
116: * return: none
117: */
118: void
1.9.2.4 misho 119: rpc_cli_closeBLOBClient(rpc_cli_t ** __restrict cli)
1.2 misho 120: {
1.9.2.4 misho 121: if (!cli || !*cli)
1.2 misho 122: return;
123:
1.9.2.4 misho 124: shutdown((*cli)->cli_sock, SHUT_RDWR);
125: close((*cli)->cli_sock);
1.2 misho 126:
1.9.2.4 misho 127: AIT_FREE_VAL(&(*cli)->cli_buf);
128:
129: free(*cli);
130: *cli = NULL;
1.2 misho 131: }
132:
1.9.2.4 misho 133: /* -------------------------------------------------------------- */
1.2 misho 134:
135: /*
1.7 misho 136: * rpc_cli_openClient() - Connect to RPC Server
137: *
1.1 misho 138: * @ProgID = ProgramID for RPC session request
139: * @ProcID = ProcessID for RPC session request
1.9.2.11 misho 140: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
1.1 misho 141: * @csHost = Host name or IP address for bind server
142: * @Port = Port for bind server, if Port == 0 default port is selected
143: * return: NULL == error or !=NULL connection to RPC server established
144: */
145: rpc_cli_t *
1.9.2.5 misho 146: rpc_cli_openClient(u_int ProgID, u_char ProcID, int netBuf, const char *csHost, u_short Port)
1.1 misho 147: {
148: rpc_cli_t *cli = NULL;
1.6 misho 149: io_sockaddr_t sa;
1.1 misho 150:
1.9.2.1 misho 151: if (!io_gethostbyname(csHost, Port, &sa))
1.1 misho 152: return NULL;
153: if (!Port)
154: Port = RPC_DEFPORT;
1.9.2.11 misho 155: if (netBuf < RPC_MIN_BUFSIZ)
1.5 misho 156: netBuf = BUFSIZ;
1.9.2.11 misho 157: else
158: netBuf = io_align(netBuf, 1); /* align netBuf length */
1.9.2.4 misho 159:
160: #ifdef HAVE_SRANDOMDEV
161: srandomdev();
162: #else
163: time_t tim;
164:
165: srandom((time(&tim) ^ getpid()));
166: #endif
1.1 misho 167:
168: cli = malloc(sizeof(rpc_cli_t));
169: if (!cli) {
170: LOGERR;
171: return NULL;
172: } else
173: memset(cli, 0, sizeof(rpc_cli_t));
1.5 misho 174:
1.9.2.4 misho 175: /* build session */
1.1 misho 176: cli->cli_parent = malloc(sizeof(rpc_sess_t));
177: if (!cli->cli_parent) {
178: LOGERR;
179: free(cli);
180: return NULL;
181: } else {
182: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
183: ((rpc_sess_t*) cli->cli_parent)->sess_program = ProgID;
184: ((rpc_sess_t*) cli->cli_parent)->sess_process = ProcID;
185: }
186:
1.6 misho 187: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
1.9.2.4 misho 188: AIT_SET_BUF2(&cli->cli_buf, 0, netBuf);
1.4 misho 189:
190: /* connect to RPC server */
1.9.2.1 misho 191: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
1.1 misho 192: if (cli->cli_sock == -1) {
193: LOGERR;
1.9.2.4 misho 194: AIT_FREE_VAL(&cli->cli_buf);
1.5 misho 195: free(cli->cli_parent);
196: free(cli);
197: return NULL;
198: }
1.6 misho 199: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.1 misho 200: LOGERR;
1.9.2.4 misho 201: AIT_FREE_VAL(&cli->cli_buf);
1.5 misho 202: close(cli->cli_sock);
1.1 misho 203: free(cli->cli_parent);
204: free(cli);
205: return NULL;
1.9.2.12! misho 206: } /*else
1.9.2.10 misho 207: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
1.9.2.12! misho 208: */
1.1 misho 209:
210: return cli;
211: }
212:
213: /*
1.7 misho 214: * rpc_cli_closeClient() - Close connection to RPC server and free resources
215: *
1.1 misho 216: * @cli = RPC Client session
217: * return: none
218: */
219: void
1.9.2.4 misho 220: rpc_cli_closeClient(rpc_cli_t ** __restrict cli)
1.1 misho 221: {
1.9.2.4 misho 222: if (!cli || !*cli)
1.1 misho 223: return;
224:
1.9.2.4 misho 225: shutdown((*cli)->cli_sock, SHUT_RDWR);
226: close((*cli)->cli_sock);
1.1 misho 227:
1.9.2.4 misho 228: AIT_FREE_VAL(&(*cli)->cli_buf);
229:
230: if ((*cli)->cli_parent)
231: free((*cli)->cli_parent);
232:
233: free(*cli);
234: *cli = NULL;
1.1 misho 235: }
236:
237:
238: /*
1.7 misho 239: * rpc_cli_execCall() - Execute RPC call
240: *
1.1 misho 241: * @cli = RPC Client session
1.8 misho 242: * @noreply = We not want RPC reply
1.9.2.4 misho 243: * @tag = Function tag for execution
1.9.2.9 misho 244: * @in_vars = IN RPC call array of rpc values, may be NULL
245: * @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with io_freeVars()
1.1 misho 246: * return: -1 error or != -1 ok result
247: */
248: int
1.9.2.4 misho 249: rpc_cli_execCall(rpc_cli_t *cli, int noreply, u_short tag,
1.5 misho 250: array_t * __restrict in_vars, array_t ** __restrict out_vars)
1.1 misho 251: {
1.5 misho 252: struct tagRPCCall *rpc;
1.7 misho 253: int ret = 0, wlen = sizeof(struct tagRPCCall);
1.9.2.4 misho 254: uint16_t crc;
255: u_char *buf;
1.9 misho 256: struct pollfd pfd;
1.1 misho 257:
1.9.2.4 misho 258: if (!cli) {
1.7 misho 259: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
1.1 misho 260: return -1;
1.9.2.4 misho 261: } else
262: buf = AIT_GET_BUF(&cli->cli_buf);
1.5 misho 263: if (out_vars)
264: *out_vars = NULL;
265:
1.4 misho 266: /* prepare RPC call */
1.5 misho 267: rpc = (struct tagRPCCall*) buf;
1.6 misho 268: rpc_addPktSession(&rpc->call_session, cli->cli_parent);
269: rpc->call_argc = htons(io_arraySize(in_vars));
1.9.2.4 misho 270: rpc->call_tag = htons(tag);
1.9.2.8 misho 271: rpc->call_seq = htons(random() % USHRT_MAX);
1.5 misho 272:
1.8 misho 273: /* set reply */
274: rpc->call_req.flags = noreply ? RPC_NOREPLY : RPC_REPLY;
275:
1.6 misho 276: if (io_arraySize(in_vars)) {
1.5 misho 277: /* marshaling variables */
1.9.2.4 misho 278: ret = io_vars2buffer(buf + wlen, AIT_LEN(&cli->cli_buf) - wlen, in_vars);
1.5 misho 279: if (ret == -1) {
1.7 misho 280: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
281: return -1;
1.3 misho 282: } else
1.7 misho 283: wlen += ret;
1.1 misho 284: }
1.4 misho 285:
1.9.2.4 misho 286: /* total packet length */
1.8 misho 287: rpc->call_len = htons(wlen);
288:
1.7 misho 289: /* calculate CRC */
290: rpc->call_crc ^= rpc->call_crc;
1.8 misho 291: rpc->call_crc = htons(crcFletcher16((u_short*) buf, wlen / 2));
1.7 misho 292:
1.9.2.4 misho 293: if ((ret = send(cli->cli_sock, buf, wlen, MSG_NOSIGNAL)) == -1) {
1.1 misho 294: LOGERR;
295: return -1;
1.7 misho 296: } else if (ret != wlen) {
297: rpc_SetErr(EPROCUNAVAIL, "RPC request, should be send %d bytes, "
298: "really sended %d bytes", wlen, ret);
299: return -1;
1.1 misho 300: }
301:
1.9.2.4 misho 302: if (noreply) /* we not want reply */
1.8 misho 303: return 0;
304:
1.5 misho 305: /* reply from RPC server */
1.9 misho 306: pfd.fd = cli->cli_sock;
307: pfd.events = POLLIN | POLLPRI;
308: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) == -1 ||
309: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
1.4 misho 310: if (ret)
1.1 misho 311: LOGERR;
1.4 misho 312: else
1.9.2.4 misho 313: rpc_SetErr(ETIMEDOUT, "Timeout, no answer from RPC server");
1.4 misho 314:
1.1 misho 315: return -1;
316: }
1.9.2.4 misho 317: memset(buf, 0, AIT_LEN(&cli->cli_buf));
318: if ((ret = recv(cli->cli_sock, buf, AIT_LEN(&cli->cli_buf), 0)) < 1) {
319: if (ret)
320: LOGERR;
1.8 misho 321: return -1;
1.1 misho 322: }
1.7 misho 323: if (ret < sizeof(struct tagRPCCall)) {
1.9.2.4 misho 324: rpc_SetErr(ERPCMISMATCH, "Short RPC packet");
1.8 misho 325: return -1;
1.7 misho 326: }
1.8 misho 327:
328: /* calculate CRC */
329: crc = ntohs(rpc->call_crc);
330: rpc->call_crc ^= rpc->call_crc;
331: if (crc != crcFletcher16((u_short*) buf, ret / 2)) {
332: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
333: return -1;
334: }
335:
1.3 misho 336: /* check RPC packet session info */
1.7 misho 337: if (rpc_chkPktSession(&rpc->call_session, cli->cli_parent)) {
1.9.2.4 misho 338: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
1.8 misho 339: return -1;
1.2 misho 340: } else
1.7 misho 341: wlen = sizeof(struct tagRPCCall);
1.9.2.4 misho 342: if (ntohs(rpc->call_tag) != tag) {
343: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply");
1.8 misho 344: return -1;
1.6 misho 345: }
1.9.2.7 misho 346: if (ntohl(rpc->call_rep.eno) && ntohl(rpc->call_rep.ret) == -1) {
1.8 misho 347: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
1.7 misho 348: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
349: strerror(ntohl(rpc->call_rep.eno)));
1.8 misho 350: return -1;
1.1 misho 351: }
1.9.2.4 misho 352: if (ntohs(rpc->call_argc) * sizeof(ait_val_t) > AIT_LEN(&cli->cli_buf) - wlen) {
1.8 misho 353: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too long ...");
354: return -1;
1.5 misho 355: }
356:
357: /* RPC is OK! Go de-marshaling variables ... */
1.9.2.9 misho 358: if (out_vars && ntohs(rpc->call_argc)) {
1.9.2.4 misho 359: *out_vars = io_buffer2vars(buf + wlen, AIT_LEN(&cli->cli_buf) - wlen,
1.7 misho 360: ntohs(rpc->call_argc), 0);
1.4 misho 361: if (!*out_vars) {
1.9.2.9 misho 362: rpc_SetErr(io_GetErrno(), "%s", io_GetError());
1.1 misho 363: return -1;
1.5 misho 364: }
1.1 misho 365: }
366:
1.7 misho 367: ret = ntohl(rpc->call_rep.ret);
1.5 misho 368: return ret;
1.1 misho 369: }
1.9.2.9 misho 370:
371: /*
372: * rpc_cli_ping() - Ping RPC server
373: *
374: * @cli = connected client
375: * return: -1 error or !=-1 ping seq id
376: */
377: inline int
378: rpc_cli_ping(rpc_cli_t *cli)
379: {
380: array_t *arr;
381: int ret = 0;
382:
383: if (!cli)
384: return -1;
385:
386: if (rpc_cli_execCall(cli, RPC_REPLY, CALL_SRVPING, NULL, &arr))
387: return -1;
388: else
389: ret = AIT_GET_U16(io_getVars(arr, 0));
390: io_freeVars(&arr);
391:
392: return ret;
393: }
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