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 1.25.2.1 2015/06/28 21:40:45 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: srandom(time(NULL) ^ getpid());
170:
171: if (!Port && proto < SOCK_RAW)
172: Port = RPC_DEFPORT;
173: if (!e_gethostbyname(csHost, Port, &sa))
174: return NULL;
175: if (!proto)
176: proto = SOCK_STREAM;
177: if (netBuf < RPC_MIN_BUFSIZ)
178: netBuf = BUFSIZ;
179: else
180: netBuf = E_ALIGN(netBuf, 2); /* align netBuf length */
181:
182: cli = e_malloc(sizeof(rpc_cli_t));
183: if (!cli) {
184: LOGERR;
185: return NULL;
186: } else
187: memset(cli, 0, sizeof(rpc_cli_t));
188:
189: /* build session */
190: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
191: if (!cli->cli_parent) {
192: LOGERR;
193: e_free(cli);
194: return NULL;
195: } else {
196: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
197: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
198: }
199:
200: cli->cli_id = proto;
201: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
202: AIT_SET_BUFSIZ(&cli->cli_buf, 0, netBuf);
203:
204: /* connect to RPC server */
205: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id,
206: cli->cli_id == SOCK_RAW ? IPPROTO_ERPC : 0);
207: if (cli->cli_sock == -1) {
208: LOGERR;
209: goto err;
210: }
211: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
212: &netBuf, sizeof netBuf) == -1) {
213: LOGERR;
214: goto err;
215: }
216: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
217: &netBuf, sizeof netBuf) == -1) {
218: LOGERR;
219: goto err;
220: }
221: if (cli->cli_id == SOCK_STREAM)
222: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
223: LOGERR;
224: goto err;
225: }
226:
227: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
228: return cli;
229: err:
230: AIT_FREE_VAL(&cli->cli_buf);
231: if (cli->cli_sock > 2)
232: close(cli->cli_sock);
233: e_free(cli->cli_parent);
234: e_free(cli);
235: return NULL;
236: }
237:
238: /*
239: * rpc_cli_reconnectClient() - Reconnecting client to RPC server
240: *
241: * @cli = RPC Client session
242: * return: -1 error or 0 ok
243: */
244: int
245: rpc_cli_reconnectClient(rpc_cli_t * __restrict cli)
246: {
247: int netBuf;
248:
249: if (!cli)
250: return -1;
251: else
252: netBuf = AIT_LEN(&cli->cli_buf);
253:
254: close(cli->cli_sock);
255:
256: srandom(time(NULL) ^ getpid());
257:
258: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id, 0);
259: if (cli->cli_sock == -1) {
260: LOGERR;
261: return -1;
262: }
263: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
264: &netBuf, sizeof netBuf) == -1) {
265: LOGERR;
266: close(cli->cli_sock);
267: return -1;
268: }
269: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
270: &netBuf, sizeof netBuf) == -1) {
271: LOGERR;
272: close(cli->cli_sock);
273: return -1;
274: }
275: if (cli->cli_id == SOCK_STREAM)
276: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
277: LOGERR;
278: close(cli->cli_sock);
279: return -1;
280: }
281:
282: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
283: return 0;
284: }
285:
286: /*
287: * rpc_cli_closeClient() - Close connection to RPC server and free resources
288: *
289: * @cli = RPC Client session
290: * return: none
291: */
292: void
293: rpc_cli_closeClient(rpc_cli_t ** __restrict cli)
294: {
295: if (!cli || !*cli || (*cli)->cli_id == SOCK_BPF)
296: return;
297:
298: if ((*cli)->cli_id == SOCK_STREAM)
299: shutdown((*cli)->cli_sock, SHUT_RDWR);
300: close((*cli)->cli_sock);
301:
302: AIT_FREE_VAL(&(*cli)->cli_buf);
303:
304: if ((*cli)->cli_parent)
305: e_free((*cli)->cli_parent);
306:
307: e_free(*cli);
308: *cli = NULL;
309: }
310:
311: /*
312: * rpc_pkt_Send() - Send RPC packet
313: *
314: * @sock = Socket
315: * @type = Type of socket
316: * @sa = Server address
317: * @pkt = RPC packet
318: * @len = Length of packet
319: * return: -1 error, 0 EOF or >0 sended bytes
320: */
321: int
322: rpc_pkt_Send(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt, int len)
323: {
324: if (!pkt) {
325: rpc_SetErr(EINVAL, "Invalid argument(s)!");
326: return -1;
327: }
328:
329: return rpc_Write(sock, type, MSG_NOSIGNAL, sa, pkt, len);
330: }
331:
332: /*
333: * rpc_pkt_Receive() - Receive RPC packet
334: *
335: * @sock = Socket
336: * @type = Type of socket
337: * @sa = Server address
338: * @pkt = RPC packet
339: * @seq = Signed packet with seq.no
340: * return: -1 error, 0 EOF or >0 received bytes
341: */
342: int
343: rpc_pkt_Receive(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt, int seq)
344: {
345: int ret;
346: struct tagRPCCall *rpc;
347:
348: if (!pkt) {
349: rpc_SetErr(EINVAL, "Invalid argument(s)!");
350: return -1;
351: }
352:
353: /* reply from RPC server */
354: do {
355: if (type == SOCK_STREAM || type == SOCK_EXT)
356: ret = rpc_Read(sock, type, 0, NULL, pkt);
357: else
358: ret = rpc_Read(sock, type, 0, sa, pkt);
359:
360: if (ret > 0) {
361: rpc = (struct tagRPCCall*) AIT_GET_BUF(pkt);
362: if (ret < ntohl(rpc->call_len))
363: continue;
364:
365: /* check for loop request */
366: if (!(rpc->call_io & RPC_ACK))
367: continue;
368: /* check for signed request */
369: if (seq != ntohl(rpc->call_seq))
370: continue;
371: }
372: } while (ret < 1);
373:
374: return ret;
375: }
376:
377: /*
378: * rpc_pkt_Request() - Build RPC Request packet
379: *
380: * @pkt = Packet buffer
381: * @sess = RPC session info
382: * @tag = Function tag for execution
383: * @vars = Function argument array of values, may be NULL
384: * @noreply = We not want RPC reply
385: * @nocrc = Without CRC calculation
386: * @seq = Sign packet with seq.no
387: * return: -1 error or != -1 prepared bytes into packet
388: */
389: int
390: rpc_pkt_Request(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
391: array_t * __restrict vars, int noreply, int nocrc, int seq)
392: {
393: struct tagRPCCall *rpc;
394: int ret = 0, estlen, len = sizeof(struct tagRPCCall);
395: u_char *buf;
396:
397: if (!pkt || !sess) {
398: rpc_SetErr(EINVAL, "Invalid argument(s)!");
399: return -1;
400: }
401:
402: /* calc estimated length */
403: estlen = ait_resideVars(vars) + len;
404: if (estlen > AIT_LEN(pkt))
405: AIT_RE_BUF(pkt, estlen);
406: buf = AIT_GET_BUF(pkt);
407:
408: /* prepare RPC call */
409: rpc = (struct tagRPCCall*) buf;
410: rpc_addPktSession(&rpc->call_session, sess);
411: rpc->call_tag = htons(tag);
412: if (!vars)
413: rpc->call_argc = 0;
414: else
415: rpc->call_argc = (u_char) array_Size(vars);
416:
417: /* set reply */
418: rpc->call_req.flags = (uint64_t) htonl(noreply ? RPC_NOREPLY : RPC_REPLY);
419:
420: if (array_Size(vars)) {
421: /* marshaling variables */
422: ret = ait_vars2buffer(buf + len, AIT_LEN(pkt) - len, vars);
423: if (ret == -1) {
424: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
425: return -1;
426: } else
427: len += ret;
428: }
429:
430: /* total packet length */
431: rpc->call_len = htonl(len);
432: rpc->call_io = RPC_REQ;
433:
434: /* sign packet */
435: rpc->call_seq = htonl(seq);
436:
437: if (!nocrc) {
438: /* calculate CRC */
439: rpc->call_crc ^= rpc->call_crc;
440: rpc->call_crc = htons(crcFletcher16((u_short*) buf, len / 2));
441: }
442:
443: return len;
444: }
445:
446: /*
447: * rpc_pkt_Replay() - Decode RPC Replay packet
448: *
449: * @pkt = Packet buffer
450: * @sess = RPC session info, if =NULL don't check session
451: * @tag = Function tag, if =CALL_TAG_MAX don't check tag
452: * @vars = Function argument array of values, may be NULL
453: * @nocrc = Without CRC calculation
454: * return: -1 error or != -1 return value from function
455: */
456: int
457: rpc_pkt_Replay(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
458: array_t ** __restrict vars, int nocrc)
459: {
460: struct tagRPCCall *rpc;
461: int len;
462: u_char *buf;
463: uint16_t crc;
464:
465: if (!pkt) {
466: rpc_SetErr(EINVAL, "Invalid argument(s)!");
467: return -1;
468: } else
469: buf = AIT_GET_BUF(pkt);
470:
471: rpc = (struct tagRPCCall*) buf;
472: if (!nocrc) {
473: /* calculate CRC */
474: crc = ntohs(rpc->call_crc);
475: rpc->call_crc ^= rpc->call_crc;
476: if (crc != crcFletcher16((u_short*) buf, ntohl(rpc->call_len) / 2)) {
477: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
478: return -1;
479: }
480: }
481:
482: /* check RPC packet session info */
483: if (sess && rpc_chkPktSession(&rpc->call_session, sess)) {
484: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
485: return -1;
486: }
487: if (tag != CALL_TAG_MAX && ntohs(rpc->call_tag) != tag) {
488: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply");
489: return -1;
490: }
491: if (ntohl(rpc->call_rep.eno) && ntohl(rpc->call_rep.ret) == -1) {
492: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
493: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
494: strerror(ntohl(rpc->call_rep.eno)));
495: return -1;
496: }
497: len = rpc->call_argc * sizeof(ait_val_t);
498: if (len > AIT_LEN(pkt) - sizeof(struct tagRPCCall)) {
499: rpc_SetErr(EMSGSIZE, "Reply RPC packet not enough buffer space ...");
500: return -1;
501: }
502: if (len > ntohl(rpc->call_len) - sizeof(struct tagRPCCall)) {
503: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too short ...");
504: return -1;
505: }
506:
507: /* RPC is OK! Go de-marshaling variables ... */
508: if (vars && rpc->call_argc) {
509: #ifdef CLI_RES_ZCOPY
510: *vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
511: rpc->call_argc, 42);
512: #else
513: *vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
514: rpc->call_argc, 0);
515: #endif
516: if (!*vars) {
517: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
518: return -1;
519: }
520: }
521:
522: return ntohl(rpc->call_rep.ret);
523: }
524:
525: /*
526: * rpc_cli_execCall() - Execute RPC call
527: *
528: * @cli = RPC Client session
529: * @noreply = We not want RPC reply
530: * @tag = Function tag for execution
531: * @in_vars = IN function argument array of values, may be NULL
532: * @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with ait_freeVars()
533: * return: -1 error, 0 ok result or 1 closed rpc connection
534: */
535: int
536: rpc_cli_execCall(rpc_cli_t *cli, int noreply, u_short tag,
537: array_t * __restrict in_vars, array_t ** __restrict out_vars)
538: {
539: int type = 0, wlen;
540: u_char *buf;
541: u_int seq = 0;
542:
543: if (!cli) {
544: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
545: return -1;
546: } else {
547: if (cli->cli_id == SOCK_STREAM || cli->cli_id == SOCK_EXT)
548: type = cli->cli_id;
549: else
550: seq = random(); /* sign package */
551: buf = AIT_GET_BUF(&cli->cli_buf);
552: }
553: if (out_vars)
554: *out_vars = NULL;
555:
556: if ((wlen = rpc_pkt_Request(&cli->cli_buf, cli->cli_parent, tag, in_vars, noreply, type, seq)) == -1)
557: return -1;
558:
559: if ((wlen = rpc_pkt_Send(cli->cli_sock, cli->cli_id, &cli->cli_sa, &cli->cli_buf, wlen)) == -1)
560: return -1;
561: if (!wlen) /* closed rpc connection */
562: return 1;
563:
564: if (noreply) /* we not want reply */
565: return 0;
566:
567: if ((wlen = rpc_pkt_Receive(cli->cli_sock, cli->cli_id, &cli->cli_sa, &cli->cli_buf, seq)) == -1)
568: return -1;
569: if (!wlen) /* closed rpc connection */
570: return 1;
571:
572: if ((wlen = rpc_pkt_Replay(&cli->cli_buf, cli->cli_parent, tag, out_vars, type)) == -1)
573: return -1;
574:
575: return 0;
576: }
577:
578: /*
579: * rpc_cli_freeCall() - Free resouce allocated by RPC call
580: *
581: * @out_vars = Returned array with variables from RPC call
582: * return: none
583: */
584: void
585: rpc_cli_freeCall(array_t ** __restrict out_vars)
586: {
587: #ifdef CLI_RES_ZCOPY
588: array_Destroy(out_vars);
589: #else
590: ait_freeVars(out_vars);
591: #endif
592: }
593:
594: /*
595: * rpc_cli_ping() - Ping RPC server
596: *
597: * @cli = connected client
598: * return: -1 error or !=-1 ping seq id
599: */
600: int
601: rpc_cli_ping(rpc_cli_t *cli)
602: {
603: int ret = 0;
604: array_t *arr = NULL;
605:
606: if (!cli)
607: return -1;
608:
609: if (rpc_cli_execCall(cli, RPC_REPLY, CALL_SRVPING, NULL, &arr))
610: return -1;
611: else
612: ret = AIT_GET_U16(array(arr, 0, ait_val_t*));
613: rpc_cli_freeCall(&arr);
614:
615: return ret;
616: }
617:
618:
619: /*
620: * rpc_cli_openClient2() - Connect to layer2 RPC Server
621: *
622: * @InstID = InstID for RPC session request
623: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
624: * @csIface = Interface name for bind client, if NULL first interface on host
625: * @csHost = Host ethernet address
626: * return: NULL == error or !=NULL connection to RPC server established
627: */
628: rpc_cli_t *
629: rpc_cli_openClient2(u_char InstID, int netBuf, const char *csIface, const char *csHost)
630: {
631: rpc_cli_t *cli = NULL;
632: sockaddr_t sa = E_SOCKADDR_INIT, sal = E_SOCKADDR_INIT;
633: char szIface[64], szStr[STRSIZ];
634: register int i;
635: struct ifreq ifr;
636: int n = 1;
637: struct bpf_insn insns[] = {
638: BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 12),
639: BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, RPC_DEFPORT, 0, 1),
640: BPF_STMT(BPF_RET + BPF_K, -1),
641: BPF_STMT(BPF_RET + BPF_K, 0),
642: };
643: struct bpf_program fcode = {
644: .bf_len = sizeof(insns) / sizeof(struct bpf_insn),
645: .bf_insns = insns
646: };
647:
648: if (!csHost || !e_getlinkbyname(csHost, &sa))
649: return NULL;
650: if (!csIface) {
651: if (e_get1stiface(szIface, sizeof szIface))
652: return NULL;
653: } else
654: strlcpy(szIface, csIface, sizeof szIface);
655: if (!e_getifacebyname(szIface, &sal))
656: return NULL;
657:
658: cli = e_malloc(sizeof(rpc_cli_t));
659: if (!cli) {
660: LOGERR;
661: return NULL;
662: } else
663: memset(cli, 0, sizeof(rpc_cli_t));
664:
665: /* build session */
666: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
667: if (!cli->cli_parent) {
668: LOGERR;
669: e_free(cli);
670: return NULL;
671: } else {
672: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
673: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
674: }
675:
676: cli->cli_id = SOCK_BPF;
677: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
678:
679: /* connect to RPC server */
680: for (i = 0; i < 10; i++) {
681: memset(szStr, 0, sizeof szStr);
682: snprintf(szStr, sizeof szStr, "/dev/bpf%d", i);
683: cli->cli_sock = open(szStr, O_RDWR);
684: if (cli->cli_sock > STDERR_FILENO)
685: break;
686: }
687: if (cli->cli_sock < 3) {
688: LOGERR;
689: e_free(cli->cli_parent);
690: e_free(cli);
691: return NULL;
692: }
693:
694: if (ioctl(cli->cli_sock, BIOCIMMEDIATE, &n) == -1) {
695: LOGERR;
696: goto err;
697: }
698: if (ioctl(cli->cli_sock, BIOCSETF, &fcode) == -1) {
699: LOGERR;
700: goto err;
701: }
702: n = (netBuf < RPC_MIN_BUFSIZ) ? getpagesize() : E_ALIGN(netBuf, 2);
703: if (ioctl(cli->cli_sock, BIOCSBLEN, &n) == -1) {
704: LOGERR;
705: goto err;
706: } else
707: AIT_SET_BUFSIZ(&cli->cli_buf, 0, n);
708:
709: memset(&ifr, 0, sizeof ifr);
710: strlcpy(ifr.ifr_name, szIface, sizeof ifr.ifr_name);
711: if (ioctl(cli->cli_sock, BIOCSETIF, &ifr) == -1) {
712: LOGERR;
713: goto err;
714: } else
715: fcntl(cli->cli_sock, F_SETFL,
716: fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
717:
718: return cli;
719: err:
720: AIT_FREE_VAL(&cli->cli_buf);
721: if (cli->cli_sock > 2)
722: close(cli->cli_sock);
723: e_free(cli->cli_parent);
724: e_free(cli);
725: return NULL;
726: }
727:
728: /*
729: * rpc_cli_closeClient2() - Close layer2 connection to RPC server and free resources
730: *
731: * @cli = RPC Client session
732: * return: none
733: */
734: void
735: rpc_cli_closeClient2(rpc_cli_t ** __restrict cli)
736: {
737: if (!cli || !*cli || (*cli)->cli_id != SOCK_BPF)
738: return;
739:
740: close((*cli)->cli_sock);
741:
742: AIT_FREE_VAL(&(*cli)->cli_buf);
743:
744: if ((*cli)->cli_parent)
745: e_free((*cli)->cli_parent);
746:
747: e_free(*cli);
748: *cli = NULL;
749: }
750:
751: /*
752: * rpc_cli_openClientExt() - Connect to pipe RPC Server
753: *
754: * @InstID = InstID for RPC session request
755: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
756: * @fd = File descriptor
757: * return: NULL == error or !=NULL connection to RPC server established
758: */
759: rpc_cli_t *
760: rpc_cli_openClientExt(u_char InstID, int netBuf, int fd)
761: {
762: rpc_cli_t *cli = NULL;
763: int n;
764:
765: cli = e_malloc(sizeof(rpc_cli_t));
766: if (!cli) {
767: LOGERR;
768: return NULL;
769: } else
770: memset(cli, 0, sizeof(rpc_cli_t));
771:
772: /* build session */
773: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
774: if (!cli->cli_parent) {
775: LOGERR;
776: e_free(cli);
777: return NULL;
778: } else {
779: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
780: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
781: }
782:
783: cli->cli_id = SOCK_EXT;
784: cli->cli_sock = fd;
785:
786: n = (netBuf < RPC_MIN_BUFSIZ) ? getpagesize() : E_ALIGN(netBuf, 2);
787: AIT_SET_BUFSIZ(&cli->cli_buf, 0, n);
788:
789: fcntl(cli->cli_sock, F_SETFL,
790: fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
791:
792: return cli;
793: }
794:
795: /*
796: * rpc_cli_closeClientExt() - Close pipe connection to RPC server and free resources
797: *
798: * @cli = RPC Client session
799: * return: none
800: */
801: void
802: rpc_cli_closeClientExt(rpc_cli_t ** __restrict cli)
803: {
804: if (!cli || !*cli || (*cli)->cli_id != SOCK_EXT)
805: return;
806:
807: AIT_FREE_VAL(&(*cli)->cli_buf);
808:
809: if ((*cli)->cli_parent)
810: e_free((*cli)->cli_parent);
811:
812: e_free(*cli);
813: *cli = NULL;
814: }
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