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 1.25.2.2 2015/06/28 21:52:26 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: if (cli->cli_id == SOCK_DGRAM) {
227: sockaddr_t sa2;
228:
229: if (!e_gethostbyname(csHost, 0, &sa2))
230: goto err;
231: if (bind(cli->cli_sock, &sa2.sa, sa2.sa.sa_len) == -1) {
232: LOGERR;
233: goto err;
234: }
235: }
236:
237: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
238: return cli;
239: err:
240: AIT_FREE_VAL(&cli->cli_buf);
241: if (cli->cli_sock > 2)
242: close(cli->cli_sock);
243: e_free(cli->cli_parent);
244: e_free(cli);
245: return NULL;
246: }
247:
248: /*
249: * rpc_cli_reconnectClient() - Reconnecting client to RPC server
250: *
251: * @cli = RPC Client session
252: * return: -1 error or 0 ok
253: */
254: int
255: rpc_cli_reconnectClient(rpc_cli_t * __restrict cli)
256: {
257: int netBuf;
258:
259: if (!cli)
260: return -1;
261: else
262: netBuf = AIT_LEN(&cli->cli_buf);
263:
264: close(cli->cli_sock);
265:
266: srandom(time(NULL) ^ getpid());
267:
268: cli->cli_sock = socket(cli->cli_sa.sa.sa_family, cli->cli_id, 0);
269: if (cli->cli_sock == -1) {
270: LOGERR;
271: return -1;
272: }
273: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_SNDBUF,
274: &netBuf, sizeof netBuf) == -1) {
275: LOGERR;
276: close(cli->cli_sock);
277: return -1;
278: }
279: if (setsockopt(cli->cli_sock, SOL_SOCKET, SO_RCVBUF,
280: &netBuf, sizeof netBuf) == -1) {
281: LOGERR;
282: close(cli->cli_sock);
283: return -1;
284: }
285: if (cli->cli_id == SOCK_STREAM)
286: if (connect(cli->cli_sock, &cli->cli_sa.sa, cli->cli_sa.sa.sa_len) == -1) {
287: LOGERR;
288: close(cli->cli_sock);
289: return -1;
290: }
291:
292: fcntl(cli->cli_sock, F_SETFL, fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
293: return 0;
294: }
295:
296: /*
297: * rpc_cli_closeClient() - Close connection to RPC server and free resources
298: *
299: * @cli = RPC Client session
300: * return: none
301: */
302: void
303: rpc_cli_closeClient(rpc_cli_t ** __restrict cli)
304: {
305: if (!cli || !*cli || (*cli)->cli_id == SOCK_BPF)
306: return;
307:
308: if ((*cli)->cli_id == SOCK_STREAM)
309: shutdown((*cli)->cli_sock, SHUT_RDWR);
310: close((*cli)->cli_sock);
311:
312: AIT_FREE_VAL(&(*cli)->cli_buf);
313:
314: if ((*cli)->cli_parent)
315: e_free((*cli)->cli_parent);
316:
317: e_free(*cli);
318: *cli = NULL;
319: }
320:
321: /*
322: * rpc_pkt_Send() - Send RPC packet
323: *
324: * @sock = Socket
325: * @type = Type of socket
326: * @sa = Server address
327: * @pkt = RPC packet
328: * @len = Length of packet
329: * return: -1 error, 0 EOF or >0 sended bytes
330: */
331: int
332: rpc_pkt_Send(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt, int len)
333: {
334: if (!pkt) {
335: rpc_SetErr(EINVAL, "Invalid argument(s)!");
336: return -1;
337: }
338:
339: return rpc_Write(sock, type, MSG_NOSIGNAL, sa, pkt, len);
340: }
341:
342: /*
343: * rpc_pkt_Receive() - Receive RPC packet
344: *
345: * @sock = Socket
346: * @type = Type of socket
347: * @sa = Server address
348: * @pkt = RPC packet
349: * @seq = Signed packet with seq.no
350: * return: -1 error, 0 EOF or >0 received bytes
351: */
352: int
353: rpc_pkt_Receive(int sock, int type, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt, int seq)
354: {
355: int ret;
356: struct tagRPCCall *rpc;
357:
358: if (!pkt) {
359: rpc_SetErr(EINVAL, "Invalid argument(s)!");
360: return -1;
361: }
362:
363: /* reply from RPC server */
364: do {
365: if (type == SOCK_STREAM || type == SOCK_EXT)
366: ret = rpc_Read(sock, type, 0, NULL, pkt);
367: else
368: ret = rpc_Read(sock, type, 0, sa, pkt);
369:
370: if (ret > 0) {
371: rpc = (struct tagRPCCall*) AIT_GET_BUF(pkt);
372: if (ret < ntohl(rpc->call_len))
373: continue;
374:
375: /* check for loop request */
376: if (!(rpc->call_io & RPC_ACK))
377: continue;
378: /* check for signed request */
379: if (seq != ntohl(rpc->call_seq))
380: continue;
381: }
382: } while (ret < 1);
383:
384: return ret;
385: }
386:
387: /*
388: * rpc_pkt_Request() - Build RPC Request packet
389: *
390: * @pkt = Packet buffer
391: * @sess = RPC session info
392: * @tag = Function tag for execution
393: * @vars = Function argument array of values, may be NULL
394: * @noreply = We not want RPC reply
395: * @nocrc = Without CRC calculation
396: * @seq = Sign packet with seq.no
397: * return: -1 error or != -1 prepared bytes into packet
398: */
399: int
400: rpc_pkt_Request(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
401: array_t * __restrict vars, int noreply, int nocrc, int seq)
402: {
403: struct tagRPCCall *rpc;
404: int ret = 0, estlen, len = sizeof(struct tagRPCCall);
405: u_char *buf;
406:
407: if (!pkt || !sess) {
408: rpc_SetErr(EINVAL, "Invalid argument(s)!");
409: return -1;
410: }
411:
412: /* calc estimated length */
413: estlen = ait_resideVars(vars) + len;
414: if (estlen > AIT_LEN(pkt))
415: AIT_RE_BUF(pkt, estlen);
416: buf = AIT_GET_BUF(pkt);
417:
418: /* prepare RPC call */
419: rpc = (struct tagRPCCall*) buf;
420: rpc_addPktSession(&rpc->call_session, sess);
421: rpc->call_tag = htons(tag);
422: if (!vars)
423: rpc->call_argc = 0;
424: else
425: rpc->call_argc = (u_char) array_Size(vars);
426:
427: /* set reply */
428: rpc->call_req.flags = (uint64_t) htonl(noreply ? RPC_NOREPLY : RPC_REPLY);
429:
430: if (array_Size(vars)) {
431: /* marshaling variables */
432: ret = ait_vars2buffer(buf + len, AIT_LEN(pkt) - len, vars);
433: if (ret == -1) {
434: rpc_SetErr(EBADRPC, "Failed to prepare RPC packet values");
435: return -1;
436: } else
437: len += ret;
438: }
439:
440: /* total packet length */
441: rpc->call_len = htonl(len);
442: rpc->call_io = RPC_REQ;
443:
444: /* sign packet */
445: rpc->call_seq = htonl(seq);
446:
447: if (!nocrc) {
448: /* calculate CRC */
449: rpc->call_crc ^= rpc->call_crc;
450: rpc->call_crc = htons(crcFletcher16((u_short*) buf, len / 2));
451: }
452:
453: return len;
454: }
455:
456: /*
457: * rpc_pkt_Replay() - Decode RPC Replay packet
458: *
459: * @pkt = Packet buffer
460: * @sess = RPC session info, if =NULL don't check session
461: * @tag = Function tag, if =CALL_TAG_MAX don't check tag
462: * @vars = Function argument array of values, may be NULL
463: * @nocrc = Without CRC calculation
464: * return: -1 error or != -1 return value from function
465: */
466: int
467: rpc_pkt_Replay(ait_val_t * __restrict pkt, rpc_sess_t * __restrict sess, u_short tag,
468: array_t ** __restrict vars, int nocrc)
469: {
470: struct tagRPCCall *rpc;
471: int len;
472: u_char *buf;
473: uint16_t crc;
474:
475: if (!pkt) {
476: rpc_SetErr(EINVAL, "Invalid argument(s)!");
477: return -1;
478: } else
479: buf = AIT_GET_BUF(pkt);
480:
481: rpc = (struct tagRPCCall*) buf;
482: if (!nocrc) {
483: /* calculate CRC */
484: crc = ntohs(rpc->call_crc);
485: rpc->call_crc ^= rpc->call_crc;
486: if (crc != crcFletcher16((u_short*) buf, ntohl(rpc->call_len) / 2)) {
487: rpc_SetErr(ERPCMISMATCH, "Bad CRC RPC packet");
488: return -1;
489: }
490: }
491:
492: /* check RPC packet session info */
493: if (sess && rpc_chkPktSession(&rpc->call_session, sess)) {
494: rpc_SetErr(ERPCMISMATCH, "Get invalid RPC session");
495: return -1;
496: }
497: if (tag != CALL_TAG_MAX && ntohs(rpc->call_tag) != tag) {
498: rpc_SetErr(ERPCMISMATCH, "Get wrong RPC reply");
499: return -1;
500: }
501: if (ntohl(rpc->call_rep.eno) && ntohl(rpc->call_rep.ret) == -1) {
502: rpc_SetErr(ntohl(rpc->call_rep.eno), "Server side: retcode=%d #%d %s",
503: ntohl(rpc->call_rep.ret), ntohl(rpc->call_rep.eno),
504: strerror(ntohl(rpc->call_rep.eno)));
505: return -1;
506: }
507: len = rpc->call_argc * sizeof(ait_val_t);
508: if (len > AIT_LEN(pkt) - sizeof(struct tagRPCCall)) {
509: rpc_SetErr(EMSGSIZE, "Reply RPC packet not enough buffer space ...");
510: return -1;
511: }
512: if (len > ntohl(rpc->call_len) - sizeof(struct tagRPCCall)) {
513: rpc_SetErr(EMSGSIZE, "Reply RPC packet is too short ...");
514: return -1;
515: }
516:
517: /* RPC is OK! Go de-marshaling variables ... */
518: if (vars && rpc->call_argc) {
519: #ifdef CLI_RES_ZCOPY
520: *vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
521: rpc->call_argc, 42);
522: #else
523: *vars = ait_buffer2vars(buf + sizeof(struct tagRPCCall), len,
524: rpc->call_argc, 0);
525: #endif
526: if (!*vars) {
527: rpc_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
528: return -1;
529: }
530: }
531:
532: return ntohl(rpc->call_rep.ret);
533: }
534:
535: /*
536: * rpc_cli_execCall() - Execute RPC call
537: *
538: * @cli = RPC Client session
539: * @noreply = We not want RPC reply
540: * @tag = Function tag for execution
541: * @in_vars = IN function argument array of values, may be NULL
542: * @out_vars = OUT returned array of rpc values, if !=NULL must be free after use with ait_freeVars()
543: * return: -1 error, 0 ok result or 1 closed rpc connection
544: */
545: int
546: rpc_cli_execCall(rpc_cli_t *cli, int noreply, u_short tag,
547: array_t * __restrict in_vars, array_t ** __restrict out_vars)
548: {
549: int type = 0, wlen;
550: u_char *buf;
551: u_int seq = 0;
552:
553: if (!cli) {
554: rpc_SetErr(EINVAL, "Can`t execute call because parameter is null or invalid!");
555: return -1;
556: } else {
557: if (cli->cli_id == SOCK_STREAM || cli->cli_id == SOCK_EXT)
558: type = cli->cli_id;
559: else
560: seq = random(); /* sign package */
561: buf = AIT_GET_BUF(&cli->cli_buf);
562: }
563: if (out_vars)
564: *out_vars = NULL;
565:
566: if ((wlen = rpc_pkt_Request(&cli->cli_buf, cli->cli_parent, tag, in_vars, noreply, type, seq)) == -1)
567: return -1;
568:
569: if ((wlen = rpc_pkt_Send(cli->cli_sock, cli->cli_id, &cli->cli_sa, &cli->cli_buf, wlen)) == -1)
570: return -1;
571: if (!wlen) /* closed rpc connection */
572: return 1;
573:
574: if (noreply) /* we not want reply */
575: return 0;
576:
577: if ((wlen = rpc_pkt_Receive(cli->cli_sock, cli->cli_id, &cli->cli_sa, &cli->cli_buf, seq)) == -1)
578: return -1;
579: if (!wlen) /* closed rpc connection */
580: return 1;
581:
582: if ((wlen = rpc_pkt_Replay(&cli->cli_buf, cli->cli_parent, tag, out_vars, type)) == -1)
583: return -1;
584:
585: return 0;
586: }
587:
588: /*
589: * rpc_cli_freeCall() - Free resouce allocated by RPC call
590: *
591: * @out_vars = Returned array with variables from RPC call
592: * return: none
593: */
594: void
595: rpc_cli_freeCall(array_t ** __restrict out_vars)
596: {
597: #ifdef CLI_RES_ZCOPY
598: array_Destroy(out_vars);
599: #else
600: ait_freeVars(out_vars);
601: #endif
602: }
603:
604: /*
605: * rpc_cli_ping() - Ping RPC server
606: *
607: * @cli = connected client
608: * return: -1 error or !=-1 ping seq id
609: */
610: int
611: rpc_cli_ping(rpc_cli_t *cli)
612: {
613: int ret = 0;
614: array_t *arr = NULL;
615:
616: if (!cli)
617: return -1;
618:
619: if (rpc_cli_execCall(cli, RPC_REPLY, CALL_SRVPING, NULL, &arr))
620: return -1;
621: else
622: ret = AIT_GET_U16(array(arr, 0, ait_val_t*));
623: rpc_cli_freeCall(&arr);
624:
625: return ret;
626: }
627:
628:
629: /*
630: * rpc_cli_openClient2() - Connect to layer2 RPC Server
631: *
632: * @InstID = InstID for RPC session request
633: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
634: * @csIface = Interface name for bind client, if NULL first interface on host
635: * @csHost = Host ethernet address
636: * return: NULL == error or !=NULL connection to RPC server established
637: */
638: rpc_cli_t *
639: rpc_cli_openClient2(u_char InstID, int netBuf, const char *csIface, const char *csHost)
640: {
641: rpc_cli_t *cli = NULL;
642: sockaddr_t sa = E_SOCKADDR_INIT, sal = E_SOCKADDR_INIT;
643: char szIface[64], szStr[STRSIZ];
644: register int i;
645: struct ifreq ifr;
646: int n = 1;
647: struct bpf_insn insns[] = {
648: BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 12),
649: BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, RPC_DEFPORT, 0, 1),
650: BPF_STMT(BPF_RET + BPF_K, -1),
651: BPF_STMT(BPF_RET + BPF_K, 0),
652: };
653: struct bpf_program fcode = {
654: .bf_len = sizeof(insns) / sizeof(struct bpf_insn),
655: .bf_insns = insns
656: };
657:
658: if (!csHost || !e_getlinkbyname(csHost, &sa))
659: return NULL;
660: if (!csIface) {
661: if (e_get1stiface(szIface, sizeof szIface))
662: return NULL;
663: } else
664: strlcpy(szIface, csIface, sizeof szIface);
665: if (!e_getifacebyname(szIface, &sal))
666: return NULL;
667:
668: cli = e_malloc(sizeof(rpc_cli_t));
669: if (!cli) {
670: LOGERR;
671: return NULL;
672: } else
673: memset(cli, 0, sizeof(rpc_cli_t));
674:
675: /* build session */
676: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
677: if (!cli->cli_parent) {
678: LOGERR;
679: e_free(cli);
680: return NULL;
681: } else {
682: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
683: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
684: }
685:
686: cli->cli_id = SOCK_BPF;
687: memcpy(&cli->cli_sa, &sa, sizeof cli->cli_sa);
688:
689: /* connect to RPC server */
690: for (i = 0; i < 10; i++) {
691: memset(szStr, 0, sizeof szStr);
692: snprintf(szStr, sizeof szStr, "/dev/bpf%d", i);
693: cli->cli_sock = open(szStr, O_RDWR);
694: if (cli->cli_sock > STDERR_FILENO)
695: break;
696: }
697: if (cli->cli_sock < 3) {
698: LOGERR;
699: e_free(cli->cli_parent);
700: e_free(cli);
701: return NULL;
702: }
703:
704: if (ioctl(cli->cli_sock, BIOCIMMEDIATE, &n) == -1) {
705: LOGERR;
706: goto err;
707: }
708: if (ioctl(cli->cli_sock, BIOCSETF, &fcode) == -1) {
709: LOGERR;
710: goto err;
711: }
712: n = (netBuf < RPC_MIN_BUFSIZ) ? getpagesize() : E_ALIGN(netBuf, 2);
713: if (ioctl(cli->cli_sock, BIOCSBLEN, &n) == -1) {
714: LOGERR;
715: goto err;
716: } else
717: AIT_SET_BUFSIZ(&cli->cli_buf, 0, n);
718:
719: memset(&ifr, 0, sizeof ifr);
720: strlcpy(ifr.ifr_name, szIface, sizeof ifr.ifr_name);
721: if (ioctl(cli->cli_sock, BIOCSETIF, &ifr) == -1) {
722: LOGERR;
723: goto err;
724: } else
725: fcntl(cli->cli_sock, F_SETFL,
726: fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
727:
728: return cli;
729: err:
730: AIT_FREE_VAL(&cli->cli_buf);
731: if (cli->cli_sock > 2)
732: close(cli->cli_sock);
733: e_free(cli->cli_parent);
734: e_free(cli);
735: return NULL;
736: }
737:
738: /*
739: * rpc_cli_closeClient2() - Close layer2 connection to RPC server and free resources
740: *
741: * @cli = RPC Client session
742: * return: none
743: */
744: void
745: rpc_cli_closeClient2(rpc_cli_t ** __restrict cli)
746: {
747: if (!cli || !*cli || (*cli)->cli_id != SOCK_BPF)
748: return;
749:
750: close((*cli)->cli_sock);
751:
752: AIT_FREE_VAL(&(*cli)->cli_buf);
753:
754: if ((*cli)->cli_parent)
755: e_free((*cli)->cli_parent);
756:
757: e_free(*cli);
758: *cli = NULL;
759: }
760:
761: /*
762: * rpc_cli_openClientExt() - Connect to pipe RPC Server
763: *
764: * @InstID = InstID for RPC session request
765: * @netBuf = Network buffer length (min:512 bytes), if =0 == BUFSIZ (also meaning max RPC packet)
766: * @fd = File descriptor
767: * return: NULL == error or !=NULL connection to RPC server established
768: */
769: rpc_cli_t *
770: rpc_cli_openClientExt(u_char InstID, int netBuf, int fd)
771: {
772: rpc_cli_t *cli = NULL;
773: int n;
774:
775: cli = e_malloc(sizeof(rpc_cli_t));
776: if (!cli) {
777: LOGERR;
778: return NULL;
779: } else
780: memset(cli, 0, sizeof(rpc_cli_t));
781:
782: /* build session */
783: cli->cli_parent = e_malloc(sizeof(rpc_sess_t));
784: if (!cli->cli_parent) {
785: LOGERR;
786: e_free(cli);
787: return NULL;
788: } else {
789: ((rpc_sess_t*) cli->cli_parent)->sess_version = RPC_VERSION;
790: ((rpc_sess_t*) cli->cli_parent)->sess_instance = InstID;
791: }
792:
793: cli->cli_id = SOCK_EXT;
794: cli->cli_sock = fd;
795:
796: n = (netBuf < RPC_MIN_BUFSIZ) ? getpagesize() : E_ALIGN(netBuf, 2);
797: AIT_SET_BUFSIZ(&cli->cli_buf, 0, n);
798:
799: fcntl(cli->cli_sock, F_SETFL,
800: fcntl(cli->cli_sock, F_GETFL) | O_NONBLOCK);
801:
802: return cli;
803: }
804:
805: /*
806: * rpc_cli_closeClientExt() - Close pipe connection to RPC server and free resources
807: *
808: * @cli = RPC Client session
809: * return: none
810: */
811: void
812: rpc_cli_closeClientExt(rpc_cli_t ** __restrict cli)
813: {
814: if (!cli || !*cli || (*cli)->cli_id != SOCK_EXT)
815: return;
816:
817: AIT_FREE_VAL(&(*cli)->cli_buf);
818:
819: if ((*cli)->cli_parent)
820: e_free((*cli)->cli_parent);
821:
822: e_free(*cli);
823: *cli = NULL;
824: }
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