1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: cli.c,v 1.24.2.2 2015/01/28 00:06:22 misho Exp $
7: *
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:
15: Copyright 2004 - 2015
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: */
46: #include "global.h"
47:
48:
49: /*
50: * rpc_cli_openBLOBClient() - Connect to BLOB Server
51: *
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;
60: int n;
61:
62: if (!rpccli) {
63: rpc_SetErr(EINVAL, "Invalid parameters can`t connect to BLOB server");
64: return NULL;
65: }
66:
67: cli = e_malloc(sizeof(rpc_cli_t));
68: if (!cli) {
69: LOGERR;
70: return NULL;
71: } else
72: memcpy(cli, rpccli, sizeof(rpc_cli_t));
73:
74: memcpy(&cli->cli_sa, &rpccli->cli_sa, sizeof(sockaddr_t));
75: switch (cli->cli_sa.sa.sa_family) {
76: case AF_INET:
77: cli->cli_sa.sin.sin_port =
78: htons(Port ? Port : ntohs(cli->cli_sa.sin.sin_port) + 1);
79: break;
80: case AF_INET6:
81: cli->cli_sa.sin6.sin6_port =
82: htons(Port ? Port : ntohs(cli->cli_sa.sin6.sin6_port) + 1);
83: break;
84: case AF_LOCAL:
85: strlcat(cli->cli_sa.sun.sun_path, ".blob", sizeof cli->cli_sa.sun.sun_path);
86: break;
87: default:
88: rpc_SetErr(EINVAL, "Invalid socket type %d", cli->cli_sa.sa.sa_family);
89: return NULL;
90: }
91:
92: AIT_COPY_VAL(&cli->cli_buf, &rpccli->cli_buf);
93: n = AIT_LEN(&cli->cli_buf);
94:
95: /* connect to BLOB server */
96: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, SOCK_STREAM, 0);
97: if (cli->cli_sock == -1) {
98: LOGERR;
99: e_free(cli);
100: return NULL;
101: }
102: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF, &n, sizeof n) == -1) {
103: LOGERR;
104: close(cli->cli_sock);
105: e_free(cli);
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);
111: e_free(cli);
112: return NULL;
113: }
114: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
115: LOGERR;
116: close(cli->cli_sock);
117: e_free(cli);
118: return NULL;
119: } else
120: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
121:
122: return cli;
123: }
124:
125: /*
126: * rpc_cli_closeBLOBClient() - Close connection to BLOB server and free resources
127: *
128: * @cli = BLOB Client session
129: * return: none
130: */
131: void
132: rpc_cli_closeBLOBClient(rpc_cli_t ** __restrict cli)
133: {
134: if (!cli || !*cli)
135: return;
136:
137: shutdown((*cli)->cli_sock, SHUT_RDWR);
138: close((*cli)->cli_sock);
139:
140: AIT_FREE_VAL(&(*cli)->cli_buf);
141:
142: e_free(*cli);
143: *cli = NULL;
144: }
145:
146: /* -------------------------------------------------------------- */
147:
148: /*
149: * rpc_cli_openClient() - Connect to RPC Server
150: *
151: * @InstID = InstID for RPC session request
152: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
153: * @csHost = Host name or IP address for bind server
154: * @Port = Port for bind server, if Port == 0 default port is selected
155: * @proto = Protocol, if == 0 choose SOCK_STREAM
156: * return: NULL == error or !=NULL connection to RPC server established
157: */
158: rpc_cli_t *
159: rpc_cli_openClient(u_char InstID, int netBuf, const char *csHost, u_short Port, int proto)
160: {
161: rpc_cli_t *cli = NULL;
162: sockaddr_t sa = E_SOCKADDR_INIT;
163:
164: if (proto < 0 || proto > SOCK_RAW) {
165: rpc_SetErr(EINVAL, "Invalid parameters can`t open RPC client");
166: return NULL;
167: }
168:
169: if (!e_gethostbyname(csHost, Port, &sa))
170: return NULL;
171: if (!Port)
172: Port = RPC_DEFPORT;
173: if (!proto)
174: proto = SOCK_STREAM;
175: if (netBuf < RPC_MIN_BUFSIZ)
176: netBuf = BUFSIZ;
177: else
178: netBuf = E_ALIGN(netBuf, 2); /* align netBuf length */
179:
180: cli = e_malloc(sizeof(rpc_cli_t));
181: if (!cli) {
182: LOGERR;
183: return NULL;
184: } else
185: memset(cli, 0, sizeof(rpc_cli_t));
186:
187: /* build session */
188: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
189: if (!cli->cli_parent) {
190: LOGERR;
191: e_free(cli);
192: return NULL;
193: } else {
194: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
195: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
196: }
197:
198: cli->cli_id = proto;
199: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
200: AIT_SET_BUFSIZ(&cli->cli_buf, 0, netBuf);
201:
202: /* connect to RPC server */
203: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id,
204: cli->cli_id == SOCK_RAW ? IPPROTO_ERPC : 0);
205: if (cli->cli_sock == -1) {
206: LOGERR;
207: goto err;
208: }
209: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
210: &netBuf, sizeof netBuf) == -1) {
211: LOGERR;
212: goto err;
213: }
214: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
215: &netBuf, sizeof netBuf) == -1) {
216: LOGERR;
217: goto err;
218: }
219: if (cli->cli_id == SOCK_STREAM)
220: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
221: LOGERR;
222: goto err;
223: }
224:
225: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
226: return cli;
227: err:
228: AIT_FREE_VAL(&cli->cli_buf);
229: if (cli->cli_sock > 2)
230: close(cli->cli_sock);
231: e_free(cli->cli_parent);
232: e_free(cli);
233: return NULL;
234: }
235:
236: /*
237: * rpc_cli_reconnectClient() - Reconnecting client to RPC server
238: *
239: * @cli = RPC Client session
240: * return: -1 error or 0 ok
241: */
242: int
243: rpc_cli_reconnectClient(rpc_cli_t * __restrict cli)
244: {
245: int netBuf;
246:
247: if (!cli)
248: return -1;
249: else
250: netBuf = AIT_LEN(&cli->cli_buf);
251:
252: close(cli->cli_sock);
253:
254: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id, 0);
255: if (cli->cli_sock == -1) {
256: LOGERR;
257: return -1;
258: }
259: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
260: &netBuf, sizeof netBuf) == -1) {
261: LOGERR;
262: close(cli->cli_sock);
263: return -1;
264: }
265: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
266: &netBuf, sizeof netBuf) == -1) {
267: LOGERR;
268: close(cli->cli_sock);
269: return -1;
270: }
271: if (cli->cli_id == SOCK_STREAM)
272: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
273: LOGERR;
274: close(cli->cli_sock);
275: return -1;
276: }
277:
278: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
279: return 0;
280: }
281:
282: /*
283: * rpc_cli_closeClient() - Close connection to RPC server and free resources
284: *
285: * @cli = RPC Client session
286: * return: none
287: */
288: void
289: rpc_cli_closeClient(rpc_cli_t ** __restrict cli)
290: {
291: if (!cli || !*cli || (*cli)->cli_id == SOCK_BPF)
292: return;
293:
294: if ((*cli)->cli_id == SOCK_STREAM)
295: shutdown((*cli)->cli_sock, SHUT_RDWR);
296: close((*cli)->cli_sock);
297:
298: AIT_FREE_VAL(&(*cli)->cli_buf);
299:
300: if ((*cli)->cli_parent)
301: e_free((*cli)->cli_parent);
302:
303: e_free(*cli);
304: *cli = NULL;
305: }
306:
307: /*
308: * rpc_pkt_Send() - Send RPC packet
309: *
310: * @sock = Socket
311: * @type = Type of socket
312: * @sa = Server address
313: * @pkt = RPC packet
314: * @len = Length of packet
315: * return: -1 error, 0 EOF or >0 sended bytes
316: */
317: int
318: rpc_pkt_Send(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt, int len)
319: {
320: u_char *buf;
321:
322: if (!pkt) {
323: rpc_SetErr(EINVAL, "Invalid argument(s)!");
324: return -1;
325: } else
326: buf = AIT_GET_BUF(pkt);
327:
328: return rpc_Write(sock, type, MSG_NOSIGNAL, sa, buf, len);
329: }
330:
331: /*
332: * rpc_pkt_Receive() - Receive RPC packet
333: *
334: * @sock = Socket
335: * @type = Type of socket
336: * @sa = Server address
337: * @pkt = RPC packet
338: * return: -1 error, 0 EOF or >0 received bytes
339: */
340: int
341: rpc_pkt_Receive(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt)
342: {
343: int ret, estlen = 0, blen = sizeof(struct tagRPCCall);
344: u_char *buf;
345: struct tagRPCCall *rpc;
346:
347: if (!pkt) {
348: rpc_SetErr(EINVAL, "Invalid argument(s)!");
349: return -1;
350: } else {
351: buf = AIT_GET_BUF(pkt);
352: rpc = (struct tagRPCCall*) buf;
353: }
354:
355: /* reply from RPC server */
356: do {
357: if (type == SOCK_STREAM)
358: ret = rpc_Read(sock, type, !estlen ? MSG_PEEK : 0, NULL, buf, blen);
359: else if (type == SOCK_EXT) {
360: ret = rpc_Read(sock, type, 0, NULL, buf, blen);
361: if (estlen) /* hack for skip sanity checks */
362: ret += sizeof(struct tagRPCCall);
363: } else if (type == SOCK_BPF) {
364: ret = rpc_Read(sock, type, 0, sa, AIT_GET_BUF(pkt), AIT_LEN(pkt));
365: if (ret > 0)
366: estlen = ret;
367: } else
368: ret = rpc_Read(sock, type, !estlen ? MSG_PEEK : 0, sa, buf, blen);
369: if (ret < 1)
370: return ret;
371:
372: /* 1st read for RPC header */
373: if (ret < sizeof(struct tagRPCCall)) {
374: rpc_SetErr(ERPCMISMATCH, "Short RPC packet %d bytes", ret);
375: return -1;
376: }
377:
378: /* check for loop request */
379: if (!estlen && !(rpc->call_io & RPC_ACK))
380: continue;
381:
382: /* check for response from known address */
383: if (!estlen) {
384: /* calc estimated length */
385: estlen = ntohl(rpc->call_len);
386: if (estlen > AIT_LEN(pkt))
387: AIT_RE_BUF(pkt, estlen);
388: blen = estlen;
389: buf = AIT_GET_BUF(pkt);
390:
391: if (type == SOCK_EXT) {
392: blen -= sizeof(struct tagRPCCall);
393: buf += sizeof(struct tagRPCCall);
394: }
395:
396: rpc = (struct tagRPCCall*) buf;
397: continue;
398: }
399:
400: /* compiler optimize loop if while(0) and stop working 'continue' on some platforms */
401: break;
402: } while (42);
403:
404: if (estlen != ret) {
405: rpc_SetErr(ERPCMISMATCH, "RPC packet mismatch estimate %d bytes, but received %d\n",
406: estlen, ret);
407: return -1;
408: }
409:
410: return ret;
411: }
412:
413: /*
414: * rpc_pkt_Request() - Build RPC Request packet
415: *
416: * @pkt = Packet buffer
417: * @sess = RPC session info
418: * @tag = Function tag for execution
419: * @vars = Function argument array of values, may be NULL
420: * @noreply = We not want RPC reply
421: * @nocrc = Without CRC calculation
422: * return: -1 error or != -1 prepared bytes into packet
423: */
424: int
425: rpc_pkt_Request(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
426: array_t * __restrict vars, int noreply, int nocrc)
427: {
428: struct tagRPCCall *rpc;
429: int ret = 0, estlen, len = sizeof(struct tagRPCCall);
430: u_char *buf;
431:
432: if (!pkt || !sess) {
433: rpc_SetErr(EINVAL, "Invalid argument(s)!");
434: return -1;
435: }
436:
437: /* calc estimated length */
438: estlen = ait_resideVars(vars) + len;
439: if (estlen > AIT_LEN(pkt))
440: AIT_RE_BUF(pkt, estlen);
441: buf = AIT_GET_BUF(pkt);
442:
443: /* prepare RPC call */
444: rpc = (struct tagRPCCall*) buf;
445: rpc_addPktSession(&rpc->call_session, sess);
446: rpc->call_tag = htons(tag);
447: if (!vars)
448: rpc->call_argc = 0;
449: else
450: rpc->call_argc = (u_char) array_Size(vars);
451:
452: /* set reply */
453: rpc->call_req.flags = (uint64_t) htonl(noreply ? RPC_NOREPLY : RPC_REPLY);
454:
455: if (array_Size(vars)) {
456: /* marshaling variables */
457: ret = ait_vars2buffer(buf + len, AIT_LEN(pkt) - len, vars);
458: if (ret == -1) {
459: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
460: return -1;
461: } else
462: len += ret;
463: }
464:
465: /* total packet length */
466: rpc->call_len = htonl(len);
467: rpc->call_io = RPC_REQ;
468:
469: if (!nocrc) {
470: /* calculate CRC */
471: rpc->call_crc ^= rpc->call_crc;
472: rpc->call_crc = htons(crcFletcher16((u_short*) buf, len / 2));
473: }
474:
475: return len;
476: }
477:
478: /*
479: * rpc_pkt_Replay() - Decode RPC Replay packet
480: *
481: * @pkt = Packet buffer
482: * @sess = RPC session info, if =NULL don't check session
483: * @tag = Function tag, if =CALL_TAG_MAX don't check tag
484: * @vars = Function argument array of values, may be NULL
485: * @nocrc = Without CRC calculation
486: * return: -1 error or != -1 return value from function
487: */
488: int
489: rpc_pkt_Replay(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
490: array_t ** __restrict vars, int nocrc)
491: {
492: struct tagRPCCall *rpc;
493: int len;
494: u_char *buf;
495: uint16_t crc;
496:
497: if (!pkt) {
498: rpc_SetErr(EINVAL, "Invalid argument(s)!");
499: return -1;
500: } else
501: buf = AIT_GET_BUF(pkt);
502:
503: rpc = (struct tagRPCCall*) buf;
504: if (!nocrc) {
505: /* calculate CRC */
506: crc = ntohs(rpc->call_crc);
507: rpc->call_crc ^= rpc->call_crc;
508: if (crc != crcFletcher16((u_short*) buf, ntohl(rpc->call_len) / 2)) {
509: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
510: return -1;
511: }
512: }
513:
514: /* check RPC packet session info */
515: if (sess && rpc_chkPktSession(&rpc->call_session, sess)) {
516: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
517: return -1;
518: }
519: if (tag != CALL_TAG_MAX && ntohs(rpc->call_tag) != tag) {
520: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply");
521: return -1;
522: }
523: if (ntohl(rpc->call_rep.eno) && ntohl(rpc->call_rep.ret) == -1) {
524: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
525: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
526: strerror(ntohl(rpc->call_rep.eno)));
527: return -1;
528: }
529: len = rpc->call_argc * sizeof(ait_val_t);
530: if (len > AIT_LEN(pkt) - sizeof(struct tagRPCCall)) {
531: rpc_SetErr(EMSGSIZE, "Reply RPC packet not enough buffer space ...");
532: return -1;
533: }
534: if (len > ntohl(rpc->call_len) - sizeof(struct tagRPCCall)) {
535: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too short ...");
536: return -1;
537: }
538:
539: /* RPC is OK! Go de-marshaling variables ... */
540: if (vars && rpc->call_argc) {
541: #ifdef CLI_RES_ZCOPY
542: *vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
543: rpc->call_argc, 42);
544: #else
545: *vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
546: rpc->call_argc, 0);
547: #endif
548: if (!*vars) {
549: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
550: return -1;
551: }
552: }
553:
554: return ntohl(rpc->call_rep.ret);
555: }
556:
557: /*
558: * rpc_cli_execCall() - Execute RPC call
559: *
560: * @cli = RPC Client session
561: * @noreply = We not want RPC reply
562: * @tag = Function tag for execution
563: * @in_vars = IN function argument array of values, may be NULL
564: * @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with ait_freeVars()
565: * return: -1 error, 0 ok result or 1 closed rpc connection
566: */
567: int
568: rpc_cli_execCall(rpc_cli_t *cli, int noreply, u_short tag,
569: array_t * __restrict in_vars, array_t ** __restrict out_vars)
570: {
571: int type = 0, wlen;
572: u_char *buf;
573:
574: if (!cli) {
575: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
576: return -1;
577: } else {
578: if (cli->cli_id == SOCK_STREAM || cli->cli_id == SOCK_EXT)
579: type = cli->cli_id;
580: buf = AIT_GET_BUF(&cli->cli_buf);
581: }
582: if (out_vars)
583: *out_vars = NULL;
584:
585: if ((wlen = rpc_pkt_Request(&cli->cli_buf, cli->cli_parent, tag, in_vars, noreply, type)) == -1)
586: return -1;
587:
588: if ((wlen = rpc_pkt_Send(cli->cli_sock, cli->cli_id, &cli->cli_sa, &cli->cli_buf, wlen)) == -1)
589: return -1;
590: if (!wlen) /* closed rpc connection */
591: return 1;
592:
593: if (noreply) /* we not want reply */
594: return 0;
595:
596: if ((wlen = rpc_pkt_Receive(cli->cli_sock, cli->cli_id, &cli->cli_sa, &cli->cli_buf)) == -1)
597: return -1;
598: if (!wlen) /* closed rpc connection */
599: return 1;
600:
601: if ((wlen = rpc_pkt_Replay(&cli->cli_buf, cli->cli_parent, tag, out_vars, type)) == -1)
602: return -1;
603:
604: return 0;
605: }
606:
607: /*
608: * rpc_cli_freeCall() - Free resouce allocated by RPC call
609: *
610: * @out_vars = Returned array with variables from RPC call
611: * return: none
612: */
613: void
614: rpc_cli_freeCall(array_t ** __restrict out_vars)
615: {
616: #ifdef CLI_RES_ZCOPY
617: array_Destroy(out_vars);
618: #else
619: ait_freeVars(out_vars);
620: #endif
621: }
622:
623: /*
624: * rpc_cli_ping() - Ping RPC server
625: *
626: * @cli = connected client
627: * return: -1 error or !=-1 ping seq id
628: */
629: int
630: rpc_cli_ping(rpc_cli_t *cli)
631: {
632: int ret = 0;
633: array_t *arr = NULL;
634:
635: if (!cli)
636: return -1;
637:
638: if (rpc_cli_execCall(cli, RPC_REPLY, CALL_SRVPING, NULL, &arr))
639: return -1;
640: else
641: ret = AIT_GET_U16(array(arr, 0, ait_val_t*));
642: rpc_cli_freeCall(&arr);
643:
644: return ret;
645: }
646:
647:
648: /*
649: * rpc_cli_openClient2() - Connect to layer2 RPC Server
650: *
651: * @InstID = InstID for RPC session request
652: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
653: * @csIface = Interface name for bind client, if NULL first interface on host
654: * @csHost = Host ethernet address
655: * return: NULL == error or !=NULL connection to RPC server established
656: */
657: rpc_cli_t *
658: rpc_cli_openClient2(u_char InstID, int netBuf, const char *csIface, const char *csHost)
659: {
660: rpc_cli_t *cli = NULL;
661: sockaddr_t sa = E_SOCKADDR_INIT, sal = E_SOCKADDR_INIT;
662: char szIface[64], szStr[STRSIZ];
663: register int i;
664: struct ifreq ifr;
665: int n = 1;
666: struct bpf_insn insns[] = {
667: BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 12),
668: BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, RPC_DEFPORT, 0, 1),
669: BPF_STMT(BPF_RET + BPF_K, -1),
670: BPF_STMT(BPF_RET + BPF_K, 0),
671: };
672: struct bpf_program fcode = {
673: .bf_len = sizeof(insns) / sizeof(struct bpf_insn),
674: .bf_insns = insns
675: };
676:
677: if (!csHost || !e_getlinkbyname(csHost, &sa))
678: return NULL;
679: if (!csIface) {
680: if (e_get1stiface(szIface, sizeof szIface))
681: return NULL;
682: } else
683: strlcpy(szIface, csIface, sizeof szIface);
684: if (!e_getifacebyname(szIface, &sal))
685: return NULL;
686:
687: cli = e_malloc(sizeof(rpc_cli_t));
688: if (!cli) {
689: LOGERR;
690: return NULL;
691: } else
692: memset(cli, 0, sizeof(rpc_cli_t));
693:
694: /* build session */
695: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
696: if (!cli->cli_parent) {
697: LOGERR;
698: e_free(cli);
699: return NULL;
700: } else {
701: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
702: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
703: }
704:
705: cli->cli_id = SOCK_BPF;
706: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
707:
708: /* connect to RPC server */
709: for (i = 0; i < 10; i++) {
710: memset(szStr, 0, sizeof szStr);
711: snprintf(szStr, sizeof szStr, "/dev/bpf%d", i);
712: cli->cli_sock = open(szStr, O_RDWR);
713: if (cli->cli_sock > STDERR_FILENO)
714: break;
715: }
716: if (cli->cli_sock < 3) {
717: LOGERR;
718: e_free(cli->cli_parent);
719: e_free(cli);
720: return NULL;
721: }
722:
723: if (ioctl(cli->cli_sock, BIOCIMMEDIATE, &n) == -1) {
724: LOGERR;
725: goto err;
726: }
727: if (ioctl(cli->cli_sock, BIOCSETF, &fcode) == -1) {
728: LOGERR;
729: goto err;
730: }
731: n = (netBuf < RPC_MIN_BUFSIZ) ? getpagesize() : E_ALIGN(netBuf, 2);
732: if (ioctl(cli->cli_sock, BIOCSBLEN, &n) == -1) {
733: LOGERR;
734: goto err;
735: } else
736: AIT_SET_BUFSIZ(&cli->cli_buf, 0, n);
737:
738: memset(&ifr, 0, sizeof ifr);
739: strlcpy(ifr.ifr_name, szIface, sizeof ifr.ifr_name);
740: if (ioctl(cli->cli_sock, BIOCSETIF, &ifr) == -1) {
741: LOGERR;
742: goto err;
743: } else
744: fcntl(cli->cli_sock, F_SETFL,
745: fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
746:
747: return cli;
748: err:
749: AIT_FREE_VAL(&cli->cli_buf);
750: if (cli->cli_sock > 2)
751: close(cli->cli_sock);
752: e_free(cli->cli_parent);
753: e_free(cli);
754: return NULL;
755: }
756:
757: /*
758: * rpc_cli_closeClient2() - Close layer2 connection to RPC server and free resources
759: *
760: * @cli = RPC Client session
761: * return: none
762: */
763: void
764: rpc_cli_closeClient2(rpc_cli_t ** __restrict cli)
765: {
766: if (!cli || !*cli || (*cli)->cli_id != SOCK_BPF)
767: return;
768:
769: close((*cli)->cli_sock);
770:
771: AIT_FREE_VAL(&(*cli)->cli_buf);
772:
773: if ((*cli)->cli_parent)
774: e_free((*cli)->cli_parent);
775:
776: e_free(*cli);
777: *cli = NULL;
778: }
779:
780: /*
781: * rpc_cli_openClientExt() - Connect to pipe RPC Server
782: *
783: * @InstID = InstID for RPC session request
784: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
785: * @fd = File descriptor
786: * return: NULL == error or !=NULL connection to RPC server established
787: */
788: rpc_cli_t *
789: rpc_cli_openClientExt(u_char InstID, int netBuf, int fd)
790: {
791: rpc_cli_t *cli = NULL;
792: int n;
793:
794: cli = e_malloc(sizeof(rpc_cli_t));
795: if (!cli) {
796: LOGERR;
797: return NULL;
798: } else
799: memset(cli, 0, sizeof(rpc_cli_t));
800:
801: /* build session */
802: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
803: if (!cli->cli_parent) {
804: LOGERR;
805: e_free(cli);
806: return NULL;
807: } else {
808: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
809: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
810: }
811:
812: cli->cli_id = SOCK_EXT;
813: cli->cli_sock = fd;
814:
815: n = (netBuf < RPC_MIN_BUFSIZ) ? getpagesize() : E_ALIGN(netBuf, 2);
816: AIT_SET_BUFSIZ(&cli->cli_buf, 0, n);
817:
818: fcntl(cli->cli_sock, F_SETFL,
819: fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
820:
821: return cli;
822: }
823:
824: /*
825: * rpc_cli_closeClientExt() - Close pipe connection to RPC server and free resources
826: *
827: * @cli = RPC Client session
828: * return: none
829: */
830: void
831: rpc_cli_closeClientExt(rpc_cli_t ** __restrict cli)
832: {
833: if (!cli || !*cli || (*cli)->cli_id != SOCK_EXT)
834: return;
835:
836: AIT_FREE_VAL(&(*cli)->cli_buf);
837:
838: if ((*cli)->cli_parent)
839: e_free((*cli)->cli_parent);
840:
841: e_free(*cli);
842: *cli = NULL;
843: }
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