Annotation of libaitrpc/src/cli.c, revision 1.26.4.1
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 $
1.26.4.1! misho 6: * $Id: cli.c,v 1.26 2015/07/02 22:28:15 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:
1.24 misho 15: Copyright 2004 - 2015
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;
1.13 misho 60: int n;
1.4 misho 61:
1.10 misho 62: if (!rpccli) {
1.7 misho 63: rpc_SetErr(EINVAL, "Invalid parameters can`t connect to BLOB server");
1.2 misho 64: return NULL;
65: }
66:
1.14 misho 67: cli = e_malloc(sizeof(rpc_cli_t));
1.2 misho 68: if (!cli) {
69: LOGERR;
70: return NULL;
71: } else
72: memcpy(cli, rpccli, sizeof(rpc_cli_t));
73:
1.14 misho 74: memcpy(&cli->cli_sa, &rpccli->cli_sa, sizeof(sockaddr_t));
1.10 misho 75: switch (cli->cli_sa.sa.sa_family) {
1.4 misho 76: case AF_INET:
1.10 misho 77: cli->cli_sa.sin.sin_port =
78: htons(Port ? Port : ntohs(cli->cli_sa.sin.sin_port) + 1);
1.4 misho 79: break;
80: case AF_INET6:
1.10 misho 81: cli->cli_sa.sin6.sin6_port =
82: htons(Port ? Port : ntohs(cli->cli_sa.sin6.sin6_port) + 1);
1.4 misho 83: break;
84: case AF_LOCAL:
1.10 misho 85: strlcat(cli->cli_sa.sun.sun_path, ".blob", sizeof cli->cli_sa.sun.sun_path);
1.4 misho 86: break;
1.10 misho 87: default:
88: rpc_SetErr(EINVAL, "Invalid socket type %d", cli->cli_sa.sa.sa_family);
89: return NULL;
1.2 misho 90: }
1.10 misho 91:
92: AIT_COPY_VAL(&cli->cli_buf, &rpccli->cli_buf);
1.13 misho 93: n = AIT_LEN(&cli->cli_buf);
1.2 misho 94:
1.4 misho 95: /* connect to BLOB server */
1.6 misho 96: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
1.2 misho 97: if (cli->cli_sock == -1) {
98: LOGERR;
1.14 misho 99: e_free(cli);
1.2 misho 100: return NULL;
101: }
1.13 misho 102: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
103: LOGERR;
104: close(cli->cli_sock);
1.14 misho 105: e_free(cli);
1.13 misho 106: return NULL;
107: }
108: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF, &n, sizeof n) == -1) {
109: LOGERR;
110: close(cli->cli_sock);
1.14 misho 111: e_free(cli);
1.13 misho 112: return NULL;
113: }
1.6 misho 114: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
1.2 misho 115: LOGERR;
1.5 misho 116: close(cli->cli_sock);
1.14 misho 117: e_free(cli);
1.2 misho 118: return NULL;
1.10 misho 119: } else
120: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
1.2 misho 121:
122: return cli;
123: }
124:
125: /*
1.7 misho 126: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
127: *
1.2 misho 128: * @cli = BLOB Client session
129: * return: none
130: */
131: void
1.10 misho 132: rpc_cli_closeBLOBClient(rpc_cli_t ** __restrict cli)
1.2 misho 133: {
1.10 misho 134: if (!cli || !*cli)
1.2 misho 135: return;
136:
1.10 misho 137: shutdown((*cli)->cli_sock, SHUT_RDWR);
138: close((*cli)->cli_sock);
139:
140: AIT_FREE_VAL(&(*cli)->cli_buf);
1.2 misho 141:
1.14 misho 142: e_free(*cli);
1.10 misho 143: *cli = NULL;
1.2 misho 144: }
145:
1.10 misho 146: /* -------------------------------------------------------------- */
1.2 misho 147:
148: /*
1.7 misho 149: * rpc_cli_openClient() - Connect to RPC Server
150: *
1.15 misho 151: * @InstID = InstID for RPC session request
1.10 misho 152: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
1.1 misho 153: * @csHost = Host name or IP address for bind server
154: * @Port = Port for bind server, if Port == 0 default port is selected
1.13 misho 155: * @proto = Protocol, if == 0 choose SOCK_STREAM
1.1 misho 156: * return: NULL == error or !=NULL connection to RPC server established
157: */
158: rpc_cli_t *
1.15 misho 159: rpc_cli_openClient(u_char InstID, int netBuf, const char *csHost, u_short Port, int proto)
1.1 misho 160: {
1.26 misho 161: int n = 1;
1.1 misho 162: rpc_cli_t *cli = NULL;
1.14 misho 163: sockaddr_t sa = E_SOCKADDR_INIT;
1.1 misho 164:
1.25 misho 165: if (proto < 0 || proto > SOCK_RAW) {
166: rpc_SetErr(EINVAL, "Invalid parameters can`t open RPC client");
167: return NULL;
168: }
169:
170: srandom(time(NULL) ^ getpid());
171:
172: if (!Port && proto < SOCK_RAW)
173: Port = RPC_DEFPORT;
1.14 misho 174: if (!e_gethostbyname(csHost, Port, &sa))
1.1 misho 175: return NULL;
1.13 misho 176: if (!proto)
177: proto = SOCK_STREAM;
1.10 misho 178: if (netBuf < RPC_MIN_BUFSIZ)
1.5 misho 179: netBuf = BUFSIZ;
1.10 misho 180: else
1.14 misho 181: netBuf = E_ALIGN(netBuf, 2); /* align netBuf length */
1.10 misho 182:
1.14 misho 183: cli = e_malloc(sizeof(rpc_cli_t));
1.1 misho 184: if (!cli) {
185: LOGERR;
186: return NULL;
187: } else
188: memset(cli, 0, sizeof(rpc_cli_t));
1.5 misho 189:
1.10 misho 190: /* build session */
1.14 misho 191: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
1.1 misho 192: if (!cli->cli_parent) {
193: LOGERR;
1.14 misho 194: e_free(cli);
1.1 misho 195: return NULL;
196: } else {
197: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
1.15 misho 198: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
1.1 misho 199: }
200:
1.13 misho 201: cli->cli_id = proto;
1.6 misho 202: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
1.14 misho 203: AIT_SET_BUFSIZ(&cli->cli_buf, 0, netBuf);
1.4 misho 204:
205: /* connect to RPC server */
1.25 misho 206: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id,
207: cli->cli_id == SOCK_RAW ? IPPROTO_ERPC : 0);
1.1 misho 208: if (cli->cli_sock == -1) {
209: LOGERR;
1.13 misho 210: goto err;
211: }
212: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
213: &netBuf, sizeof netBuf) == -1) {
214: LOGERR;
215: goto err;
1.5 misho 216: }
1.13 misho 217: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
218: &netBuf, sizeof netBuf) == -1) {
1.1 misho 219: LOGERR;
1.13 misho 220: goto err;
221: }
1.26 misho 222: if (cli->cli_id == SOCK_STREAM) {
223: setsockopt(cli->cli_sock, IPPROTO_TCP, TCP_NODELAY, &n, sizeof n);
1.13 misho 224: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
225: LOGERR;
226: goto err;
227: }
1.26 misho 228: }
229: if (cli->cli_id == SOCK_DGRAM) {
230: sockaddr_t sa2;
231:
232: if (!e_gethostbyname(csHost, 0, &sa2))
233: goto err;
234: if (bind(cli->cli_sock, &sa2.sa, sa2.sa.sa_len) == -1) {
235: LOGERR;
236: goto err;
237: }
238: }
1.1 misho 239:
1.13 misho 240: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
1.1 misho 241: return cli;
1.13 misho 242: err:
243: AIT_FREE_VAL(&cli->cli_buf);
244: if (cli->cli_sock > 2)
245: close(cli->cli_sock);
1.14 misho 246: e_free(cli->cli_parent);
247: e_free(cli);
1.13 misho 248: return NULL;
1.1 misho 249: }
250:
251: /*
1.21 misho 252: * rpc_cli_reconnectClient() - Reconnecting client to RPC server
253: *
254: * @cli = RPC Client session
255: * return: -1 error or 0 ok
256: */
257: int
258: rpc_cli_reconnectClient(rpc_cli_t * __restrict cli)
259: {
260: int netBuf;
261:
262: if (!cli)
263: return -1;
264: else
265: netBuf = AIT_LEN(&cli->cli_buf);
266:
1.26 misho 267: if (cli->cli_id == SOCK_STREAM)
268: shutdown(cli->cli_sock, SHUT_RDWR);
269: if (cli->cli_id == SOCK_DGRAM && cli->cli_sa.sa.sa_family == AF_LOCAL) {
270: sockaddr_t sa2 = E_SOCKADDR_INIT;
271: socklen_t salen;
272:
273: sa2.sa.sa_len = salen = sizeof sa2;
274: if (!getsockname(cli->cli_sock, &sa2.sa, &salen))
275: unlink(sa2.sun.sun_path);
276: }
1.21 misho 277: close(cli->cli_sock);
278:
1.25 misho 279: srandom(time(NULL) ^ getpid());
280:
1.21 misho 281: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id, 0);
282: if (cli->cli_sock == -1) {
283: LOGERR;
284: return -1;
285: }
286: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
287: &netBuf, sizeof netBuf) == -1) {
288: LOGERR;
289: close(cli->cli_sock);
290: return -1;
291: }
292: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
293: &netBuf, sizeof netBuf) == -1) {
294: LOGERR;
295: close(cli->cli_sock);
296: return -1;
297: }
298: if (cli->cli_id == SOCK_STREAM)
299: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
300: LOGERR;
301: close(cli->cli_sock);
302: return -1;
303: }
304:
305: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
306: return 0;
307: }
308:
309: /*
1.7 misho 310: * rpc_cli_closeClient() - Close connection to RPC server and free resources
311: *
1.1 misho 312: * @cli = RPC Client session
313: * return: none
314: */
315: void
1.10 misho 316: rpc_cli_closeClient(rpc_cli_t ** __restrict cli)
1.1 misho 317: {
1.23 misho 318: if (!cli || !*cli || (*cli)->cli_id == SOCK_BPF)
1.1 misho 319: return;
320:
1.13 misho 321: if ((*cli)->cli_id == SOCK_STREAM)
322: shutdown((*cli)->cli_sock, SHUT_RDWR);
1.26 misho 323: if ((*cli)->cli_id == SOCK_DGRAM && (*cli)->cli_sa.sa.sa_family == AF_LOCAL) {
324: sockaddr_t sa2 = E_SOCKADDR_INIT;
325: socklen_t salen;
326:
327: sa2.sa.sa_len = salen = sizeof sa2;
328: if (!getsockname((*cli)->cli_sock, &sa2.sa, &salen))
329: unlink(sa2.sun.sun_path);
330: }
1.10 misho 331: close((*cli)->cli_sock);
332:
333: AIT_FREE_VAL(&(*cli)->cli_buf);
334:
335: if ((*cli)->cli_parent)
1.14 misho 336: e_free((*cli)->cli_parent);
1.1 misho 337:
1.14 misho 338: e_free(*cli);
1.10 misho 339: *cli = NULL;
1.1 misho 340: }
341:
342: /*
1.14 misho 343: * rpc_pkt_Send() - Send RPC packet
1.7 misho 344: *
1.14 misho 345: * @sock = Socket
346: * @type = Type of socket
347: * @sa = Server address
348: * @pkt = RPC packet
349: * @len = Length of packet
1.21 misho 350: * return: -1 error, 0 EOF or >0 sended bytes
1.1 misho 351: */
352: int
1.14 misho 353: rpc_pkt_Send(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt, int len)
1.1 misho 354: {
1.14 misho 355: if (!pkt) {
356: rpc_SetErr(EINVAL, "Invalid argument(s)!");
1.1 misho 357: return -1;
1.25 misho 358: }
1.7 misho 359:
1.25 misho 360: return rpc_Write(sock, type, MSG_NOSIGNAL, sa, pkt, len);
1.14 misho 361: }
362:
363: /*
364: * rpc_pkt_Receive() - Receive RPC packet
365: *
366: * @sock = Socket
367: * @type = Type of socket
368: * @sa = Server address
369: * @pkt = RPC packet
1.25 misho 370: * @seq = Signed packet with seq.no
1.21 misho 371: * return: -1 error, 0 EOF or >0 received bytes
1.14 misho 372: */
373: int
1.25 misho 374: rpc_pkt_Receive(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt, int seq)
1.14 misho 375: {
1.25 misho 376: int ret;
1.17 misho 377: struct tagRPCCall *rpc;
1.14 misho 378:
379: if (!pkt) {
380: rpc_SetErr(EINVAL, "Invalid argument(s)!");
381: return -1;
1.20 misho 382: }
1.10 misho 383:
384: /* reply from RPC server */
385: do {
1.25 misho 386: if (type == SOCK_STREAM || type == SOCK_EXT)
387: ret = rpc_Read(sock, type, 0, NULL, pkt);
388: else
389: ret = rpc_Read(sock, type, 0, sa, pkt);
390:
391: if (ret > 0) {
392: rpc = (struct tagRPCCall*) AIT_GET_BUF(pkt);
1.26 misho 393: if (ret < ntohl(rpc->call_len))
394: continue;
1.25 misho 395:
396: /* check for loop request */
397: if (!(rpc->call_io & RPC_ACK))
398: continue;
399: /* check for signed request */
400: if (seq != ntohl(rpc->call_seq))
401: continue;
1.17 misho 402: }
1.25 misho 403: } while (ret < 1);
1.8 misho 404:
1.14 misho 405: return ret;
406: }
407:
408: /*
409: * rpc_pkt_Request() - Build RPC Request packet
410: *
411: * @pkt = Packet buffer
412: * @sess = RPC session info
413: * @tag = Function tag for execution
414: * @vars = Function argument array of values, may be NULL
415: * @noreply = We not want RPC reply
1.15 misho 416: * @nocrc = Without CRC calculation
1.25 misho 417: * @seq = Sign packet with seq.no
1.14 misho 418: * return: -1 error or != -1 prepared bytes into packet
419: */
420: int
421: rpc_pkt_Request(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
1.25 misho 422: array_t * __restrict vars, int noreply, int nocrc, int seq)
1.14 misho 423: {
424: struct tagRPCCall *rpc;
1.17 misho 425: int ret = 0, estlen, len = sizeof(struct tagRPCCall);
1.14 misho 426: u_char *buf;
427:
428: if (!pkt || !sess) {
429: rpc_SetErr(EINVAL, "Invalid argument(s)!");
430: return -1;
1.17 misho 431: }
432:
433: /* calc estimated length */
434: estlen = ait_resideVars(vars) + len;
1.26 misho 435: if (estlen > AIT_LEN(pkt)) {
436: rpc_SetErr(EMSGSIZE, "Message too long");
437: return -1;
438: }
1.17 misho 439: buf = AIT_GET_BUF(pkt);
1.14 misho 440:
441: /* prepare RPC call */
442: rpc = (struct tagRPCCall*) buf;
443: rpc_addPktSession(&rpc->call_session, sess);
444: rpc->call_tag = htons(tag);
445: if (!vars)
446: rpc->call_argc = 0;
447: else
1.24 misho 448: rpc->call_argc = (u_char) array_Size(vars);
1.14 misho 449:
450: /* set reply */
1.19 misho 451: rpc->call_req.flags = (uint64_t) htonl(noreply ? RPC_NOREPLY : RPC_REPLY);
1.14 misho 452:
453: if (array_Size(vars)) {
454: /* marshaling variables */
455: ret = ait_vars2buffer(buf + len, AIT_LEN(pkt) - len, vars);
456: if (ret == -1) {
457: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
458: return -1;
459: } else
460: len += ret;
461: }
462:
463: /* total packet length */
1.17 misho 464: rpc->call_len = htonl(len);
1.24 misho 465: rpc->call_io = RPC_REQ;
1.14 misho 466:
1.25 misho 467: /* sign packet */
468: rpc->call_seq = htonl(seq);
469:
1.15 misho 470: if (!nocrc) {
471: /* calculate CRC */
472: rpc->call_crc ^= rpc->call_crc;
473: rpc->call_crc = htons(crcFletcher16((u_short*) buf, len / 2));
474: }
1.14 misho 475:
476: return len;
477: }
478:
479: /*
480: * rpc_pkt_Replay() - Decode RPC Replay packet
481: *
482: * @pkt = Packet buffer
1.23 misho 483: * @sess = RPC session info, if =NULL don't check session
1.25 misho 484: * @tag = Function tag, if =CALL_TAG_MAX don't check tag
1.14 misho 485: * @vars = Function argument array of values, may be NULL
1.15 misho 486: * @nocrc = Without CRC calculation
1.14 misho 487: * return: -1 error or != -1 return value from function
488: */
489: int
490: rpc_pkt_Replay(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
1.15 misho 491: array_t ** __restrict vars, int nocrc)
1.14 misho 492: {
493: struct tagRPCCall *rpc;
494: int len;
495: u_char *buf;
496: uint16_t crc;
497:
1.23 misho 498: if (!pkt) {
1.14 misho 499: rpc_SetErr(EINVAL, "Invalid argument(s)!");
500: return -1;
501: } else
502: buf = AIT_GET_BUF(pkt);
503:
504: rpc = (struct tagRPCCall*) buf;
1.15 misho 505: if (!nocrc) {
506: /* calculate CRC */
507: crc = ntohs(rpc->call_crc);
508: rpc->call_crc ^= rpc->call_crc;
1.17 misho 509: if (crc != crcFletcher16((u_short*) buf, ntohl(rpc->call_len) / 2)) {
1.15 misho 510: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
511: return -1;
512: }
1.8 misho 513: }
514:
1.3 misho 515: /* check RPC packet session info */
1.23 misho 516: if (sess && rpc_chkPktSession(&rpc->call_session, sess)) {
1.10 misho 517: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
1.8 misho 518: return -1;
1.14 misho 519: }
1.25 misho 520: if (tag != CALL_TAG_MAX && ntohs(rpc->call_tag) != tag) {
1.10 misho 521: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply");
1.8 misho 522: return -1;
1.6 misho 523: }
1.10 misho 524: if (ntohl(rpc->call_rep.eno) && ntohl(rpc->call_rep.ret) == -1) {
1.8 misho 525: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
1.7 misho 526: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
527: strerror(ntohl(rpc->call_rep.eno)));
1.8 misho 528: return -1;
1.1 misho 529: }
1.24 misho 530: len = rpc->call_argc * sizeof(ait_val_t);
1.14 misho 531: if (len > AIT_LEN(pkt) - sizeof(struct tagRPCCall)) {
532: rpc_SetErr(EMSGSIZE, "Reply RPC packet not enough buffer space ...");
533: return -1;
534: }
1.17 misho 535: if (len > ntohl(rpc->call_len) - sizeof(struct tagRPCCall)) {
1.14 misho 536: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too short ...");
1.8 misho 537: return -1;
1.5 misho 538: }
539:
540: /* RPC is OK! Go de-marshaling variables ... */
1.24 misho 541: if (vars && rpc->call_argc) {
1.12 misho 542: #ifdef CLI_RES_ZCOPY
1.14 misho 543: *vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
1.24 misho 544: rpc->call_argc, 42);
1.12 misho 545: #else
1.14 misho 546: *vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
1.24 misho 547: rpc->call_argc, 0);
1.12 misho 548: #endif
1.14 misho 549: if (!*vars) {
550: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
1.1 misho 551: return -1;
1.5 misho 552: }
1.1 misho 553: }
554:
1.14 misho 555: return ntohl(rpc->call_rep.ret);
556: }
557:
558: /*
559: * rpc_cli_execCall() - Execute RPC call
560: *
561: * @cli = RPC Client session
562: * @noreply = We not want RPC reply
563: * @tag = Function tag for execution
564: * @in_vars = IN function argument array of values, may be NULL
565: * @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with ait_freeVars()
1.21 misho 566: * return: -1 error, 0 ok result or 1 closed rpc connection
1.14 misho 567: */
568: int
569: rpc_cli_execCall(rpc_cli_t *cli, int noreply, u_short tag,
570: array_t * __restrict in_vars, array_t ** __restrict out_vars)
571: {
1.15 misho 572: int type = 0, wlen;
1.25 misho 573: u_int seq = 0;
1.14 misho 574:
575: if (!cli) {
576: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
577: return -1;
1.15 misho 578: } else {
1.24 misho 579: if (cli->cli_id == SOCK_STREAM || cli->cli_id == SOCK_EXT)
1.15 misho 580: type = cli->cli_id;
1.25 misho 581: else
582: seq = random(); /* sign package */
1.15 misho 583: }
1.14 misho 584: if (out_vars)
585: *out_vars = NULL;
586:
1.26 misho 587: if ((wlen = rpc_pkt_Request(&cli->cli_buf, cli->cli_parent, tag,
588: in_vars, noreply, type, seq)) == -1)
1.14 misho 589: return -1;
590:
1.26 misho 591: if ((wlen = rpc_pkt_Send(cli->cli_sock, cli->cli_id, &cli->cli_sa,
592: &cli->cli_buf, wlen)) == -1)
1.14 misho 593: return -1;
1.21 misho 594: if (!wlen) /* closed rpc connection */
595: return 1;
1.14 misho 596:
597: if (noreply) /* we not want reply */
598: return 0;
599:
1.26 misho 600: if ((wlen = rpc_pkt_Receive(cli->cli_sock, cli->cli_id, &cli->cli_sa,
601: &cli->cli_buf, seq)) == -1)
1.14 misho 602: return -1;
1.21 misho 603: if (!wlen) /* closed rpc connection */
604: return 1;
1.14 misho 605:
1.26 misho 606: if ((wlen = rpc_pkt_Replay(&cli->cli_buf, cli->cli_parent, tag,
607: out_vars, type)) == -1)
1.14 misho 608: return -1;
609:
1.15 misho 610: return 0;
1.10 misho 611: }
612:
613: /*
1.12 misho 614: * rpc_cli_freeCall() - Free resouce allocated by RPC call
615: *
616: * @out_vars = Returned array with variables from RPC call
617: * return: none
618: */
1.16 misho 619: void
1.12 misho 620: rpc_cli_freeCall(array_t ** __restrict out_vars)
621: {
622: #ifdef CLI_RES_ZCOPY
1.14 misho 623: array_Destroy(out_vars);
1.12 misho 624: #else
1.14 misho 625: ait_freeVars(out_vars);
1.12 misho 626: #endif
627: }
628:
629: /*
1.10 misho 630: * rpc_cli_ping() - Ping RPC server
631: *
632: * @cli = connected client
633: * return: -1 error or !=-1 ping seq id
634: */
1.16 misho 635: int
1.10 misho 636: rpc_cli_ping(rpc_cli_t *cli)
637: {
638: int ret = 0;
639: array_t *arr = NULL;
640:
641: if (!cli)
642: return -1;
643:
644: if (rpc_cli_execCall(cli, RPC_REPLY, CALL_SRVPING, NULL, &arr))
645: return -1;
646: else
1.14 misho 647: ret = AIT_GET_U16(array(arr, 0, ait_val_t*));
1.12 misho 648: rpc_cli_freeCall(&arr);
1.10 misho 649:
1.5 misho 650: return ret;
1.1 misho 651: }
1.23 misho 652:
653:
654: /*
655: * rpc_cli_openClient2() - Connect to layer2 RPC Server
656: *
657: * @InstID = InstID for RPC session request
658: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
659: * @csIface = Interface name for bind client, if NULL first interface on host
660: * @csHost = Host ethernet address
661: * return: NULL == error or !=NULL connection to RPC server established
662: */
663: rpc_cli_t *
664: rpc_cli_openClient2(u_char InstID, int netBuf, const char *csIface, const char *csHost)
665: {
666: rpc_cli_t *cli = NULL;
667: sockaddr_t sa = E_SOCKADDR_INIT, sal = E_SOCKADDR_INIT;
668: char szIface[64], szStr[STRSIZ];
669: register int i;
670: struct ifreq ifr;
671: int n = 1;
672: struct bpf_insn insns[] = {
673: BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 12),
674: BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, RPC_DEFPORT, 0, 1),
675: BPF_STMT(BPF_RET + BPF_K, -1),
676: BPF_STMT(BPF_RET + BPF_K, 0),
677: };
678: struct bpf_program fcode = {
679: .bf_len = sizeof(insns) / sizeof(struct bpf_insn),
680: .bf_insns = insns
681: };
682:
683: if (!csHost || !e_getlinkbyname(csHost, &sa))
684: return NULL;
685: if (!csIface) {
686: if (e_get1stiface(szIface, sizeof szIface))
687: return NULL;
688: } else
689: strlcpy(szIface, csIface, sizeof szIface);
690: if (!e_getifacebyname(szIface, &sal))
691: return NULL;
692:
693: cli = e_malloc(sizeof(rpc_cli_t));
694: if (!cli) {
695: LOGERR;
696: return NULL;
697: } else
698: memset(cli, 0, sizeof(rpc_cli_t));
699:
700: /* build session */
701: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
702: if (!cli->cli_parent) {
703: LOGERR;
704: e_free(cli);
705: return NULL;
706: } else {
707: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
708: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
709: }
710:
711: cli->cli_id = SOCK_BPF;
712: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
713:
714: /* connect to RPC server */
715: for (i = 0; i < 10; i++) {
716: memset(szStr, 0, sizeof szStr);
717: snprintf(szStr, sizeof szStr, "/dev/bpf%d", i);
718: cli->cli_sock = open(szStr, O_RDWR);
719: if (cli->cli_sock > STDERR_FILENO)
720: break;
721: }
722: if (cli->cli_sock < 3) {
723: LOGERR;
724: e_free(cli->cli_parent);
725: e_free(cli);
726: return NULL;
727: }
728:
729: if (ioctl(cli->cli_sock, BIOCIMMEDIATE, &n) == -1) {
730: LOGERR;
731: goto err;
732: }
733: if (ioctl(cli->cli_sock, BIOCSETF, &fcode) == -1) {
734: LOGERR;
735: goto err;
736: }
737: n = (netBuf < RPC_MIN_BUFSIZ) ? getpagesize() : E_ALIGN(netBuf, 2);
738: if (ioctl(cli->cli_sock, BIOCSBLEN, &n) == -1) {
739: LOGERR;
740: goto err;
741: } else
742: AIT_SET_BUFSIZ(&cli->cli_buf, 0, n);
743:
744: memset(&ifr, 0, sizeof ifr);
745: strlcpy(ifr.ifr_name, szIface, sizeof ifr.ifr_name);
746: if (ioctl(cli->cli_sock, BIOCSETIF, &ifr) == -1) {
747: LOGERR;
748: goto err;
749: } else
750: fcntl(cli->cli_sock, F_SETFL,
751: fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
752:
753: return cli;
754: err:
755: AIT_FREE_VAL(&cli->cli_buf);
756: if (cli->cli_sock > 2)
757: close(cli->cli_sock);
758: e_free(cli->cli_parent);
759: e_free(cli);
760: return NULL;
761: }
762:
763: /*
764: * rpc_cli_closeClient2() - Close layer2 connection to RPC server and free resources
765: *
766: * @cli = RPC Client session
767: * return: none
768: */
769: void
770: rpc_cli_closeClient2(rpc_cli_t ** __restrict cli)
771: {
772: if (!cli || !*cli || (*cli)->cli_id != SOCK_BPF)
773: return;
774:
775: close((*cli)->cli_sock);
776:
777: AIT_FREE_VAL(&(*cli)->cli_buf);
778:
779: if ((*cli)->cli_parent)
780: e_free((*cli)->cli_parent);
781:
782: e_free(*cli);
783: *cli = NULL;
784: }
1.24 misho 785:
786: /*
787: * rpc_cli_openClientExt() - Connect to pipe RPC Server
788: *
789: * @InstID = InstID for RPC session request
790: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
791: * @fd = File descriptor
792: * return: NULL == error or !=NULL connection to RPC server established
793: */
794: rpc_cli_t *
795: rpc_cli_openClientExt(u_char InstID, int netBuf, int fd)
796: {
797: rpc_cli_t *cli = NULL;
798: int n;
799:
800: cli = e_malloc(sizeof(rpc_cli_t));
801: if (!cli) {
802: LOGERR;
803: return NULL;
804: } else
805: memset(cli, 0, sizeof(rpc_cli_t));
806:
807: /* build session */
808: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
809: if (!cli->cli_parent) {
810: LOGERR;
811: e_free(cli);
812: return NULL;
813: } else {
814: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
815: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
816: }
817:
818: cli->cli_id = SOCK_EXT;
819: cli->cli_sock = fd;
820:
821: n = (netBuf < RPC_MIN_BUFSIZ) ? getpagesize() : E_ALIGN(netBuf, 2);
822: AIT_SET_BUFSIZ(&cli->cli_buf, 0, n);
823:
824: fcntl(cli->cli_sock, F_SETFL,
825: fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
826:
827: return cli;
828: }
829:
830: /*
831: * rpc_cli_closeClientExt() - Close pipe connection to RPC server and free resources
832: *
833: * @cli = RPC Client session
834: * return: none
835: */
836: void
837: rpc_cli_closeClientExt(rpc_cli_t ** __restrict cli)
838: {
839: if (!cli || !*cli || (*cli)->cli_id != SOCK_EXT)
840: return;
841:
842: AIT_FREE_VAL(&(*cli)->cli_buf);
843:
844: if ((*cli)->cli_parent)
845: e_free((*cli)->cli_parent);
846:
847: e_free(*cli);
848: *cli = NULL;
849: }
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