summaryrefslogtreecommitdiffstats
path: root/runtime/nsd_ptcp.c
blob: c5480a0580bf4742c0b3f646e4849253573eef5f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
/* nsd_ptcp.c
 *
 * An implementation of the nsd interface for plain tcp sockets.
 * 
 * Copyright 2007, 2008 Rainer Gerhards and Adiscon GmbH.
 *
 * This file is part of the rsyslog runtime library.
 *
 * The rsyslog runtime library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The rsyslog runtime library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the rsyslog runtime library.  If not, see <http://www.gnu.org/licenses/>.
 *
 * A copy of the GPL can be found in the file "COPYING" in this distribution.
 * A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
 */
#include "config.h"

#include "rsyslog.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <ctype.h>
#include <netdb.h>
#include <fnmatch.h>
#include <fcntl.h>
#include <unistd.h>

#include "syslogd-types.h"
#include "module-template.h"
#include "parse.h"
#include "srUtils.h"
#include "obj.h"
#include "errmsg.h"
#include "net.h"
#include "netstrms.h"
#include "netstrm.h"
#include "nsdsel_ptcp.h"
#include "nsd_ptcp.h"

MODULE_TYPE_LIB

/* static data */
DEFobjStaticHelpers
DEFobjCurrIf(errmsg)
DEFobjCurrIf(glbl)
DEFobjCurrIf(net)
DEFobjCurrIf(netstrms)
DEFobjCurrIf(netstrm)


/* a few deinit helpers */

/* close socket if open (may always be called) */
static void
sockClose(int *pSock)
{
	if(*pSock >= 0) {
		close(*pSock);
		*pSock = -1;
	}
}

/* Standard-Constructor
 */
BEGINobjConstruct(nsd_ptcp) /* be sure to specify the object type also in END macro! */
	pThis->sock = -1;
ENDobjConstruct(nsd_ptcp)


/* destructor for the nsd_ptcp object */
BEGINobjDestruct(nsd_ptcp) /* be sure to specify the object type also in END and CODESTART macros! */
CODESTARTobjDestruct(nsd_ptcp)
	sockClose(&pThis->sock);
	if(pThis->pRemHostIP != NULL)
		free(pThis->pRemHostIP);
	if(pThis->pRemHostName != NULL)
		free(pThis->pRemHostName);
ENDobjDestruct(nsd_ptcp)


/* Provide access to the underlying OS socket. This is primarily
 * useful for other drivers (like nsd_gtls) who utilize ourselfs
 * for some of their functionality. -- rgerhards, 2008-04-18
 */
static rsRetVal
GetSock(nsd_t *pNsd, int *pSock)
{
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;
	DEFiRet;

	ISOBJ_TYPE_assert((pThis), nsd_ptcp);
	assert(pSock != NULL);

	*pSock = pThis->sock;

	RETiRet;
}


/* Set the driver mode. We support no different modes, but allow mode
 * 0 to be set to be compatible with config file defaults and the other
 * drivers.
 * rgerhards, 2008-04-28
 */
static rsRetVal
SetMode(nsd_t __attribute__((unused)) *pNsd, int mode)
{
	DEFiRet;
	if(mode != 0)
		ABORT_FINALIZE(RS_RET_INVAID_DRVR_MODE);
finalize_it:
	RETiRet;
}


/* Provide access to the underlying OS socket. This is primarily
 * useful for other drivers (like nsd_gtls) who utilize ourselfs
 * for some of their functionality.
 * This function sets the socket -- rgerhards, 2008-04-25
 */
static rsRetVal
SetSock(nsd_t *pNsd, int sock)
{
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;
	DEFiRet;

	ISOBJ_TYPE_assert((pThis), nsd_ptcp);
	assert(sock >= 0);

	pThis->sock = sock;

	RETiRet;
}


/* abort a connection. This is meant to be called immediately
 * before the Destruct call. -- rgerhards, 2008-03-24
 */
static rsRetVal
Abort(nsd_t *pNsd)
{
	struct linger ling;
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;

	DEFiRet;
	ISOBJ_TYPE_assert((pThis), nsd_ptcp);

	if((pThis)->sock != -1) {
		ling.l_onoff = 1;
		ling.l_linger = 0;
       		if(setsockopt((pThis)->sock, SOL_SOCKET, SO_LINGER, &ling, sizeof(ling)) < 0 ) {
			dbgprintf("could not set SO_LINGER, errno %d\n", errno);
		}
	}

	RETiRet;
}


/* Set pRemHost based on the address provided. This is to be called upon accept()ing
 * a connection request. It must be provided by the socket we received the
 * message on as well as a NI_MAXHOST size large character buffer for the FQDN.
 * Please see http://www.hmug.org/man/3/getnameinfo.php (under Caveats)
 * for some explanation of the code found below. If we detect a malicious
 * hostname, we return RS_RET_MALICIOUS_HNAME and let the caller decide
 * on how to deal with that.
 * rgerhards, 2008-03-31
 */
static rsRetVal
FillRemHost(nsd_ptcp_t *pThis, struct sockaddr *pAddr)
{
	int error;
	uchar szIP[NI_MAXHOST] = "";
	uchar szHname[NI_MAXHOST] = "";
	struct addrinfo hints, *res;
	size_t len;
	
	DEFiRet;
	ISOBJ_TYPE_assert(pThis, nsd_ptcp);
	assert(pAddr != NULL);

        error = getnameinfo(pAddr, SALEN(pAddr), (char*)szIP, sizeof(szIP), NULL, 0, NI_NUMERICHOST);

        if(error) {
                dbgprintf("Malformed from address %s\n", gai_strerror(error));
		strcpy((char*)szHname, "???");
		strcpy((char*)szIP, "???");
		ABORT_FINALIZE(RS_RET_INVALID_HNAME);
	}

	if(!glbl.GetDisableDNS()) {
		error = getnameinfo(pAddr, SALEN(pAddr), (char*)szHname, NI_MAXHOST, NULL, 0, NI_NAMEREQD);
		if(error == 0) {
			memset (&hints, 0, sizeof (struct addrinfo));
			hints.ai_flags = AI_NUMERICHOST;
			hints.ai_socktype = SOCK_STREAM;
			/* we now do a lookup once again. This one should fail,
			 * because we should not have obtained a non-numeric address. If
			 * we got a numeric one, someone messed with DNS!
			 */
			if(getaddrinfo((char*)szHname, NULL, &hints, &res) == 0) {
				freeaddrinfo (res);
				/* OK, we know we have evil, so let's indicate this to our caller */
				snprintf((char*)szHname, NI_MAXHOST, "[MALICIOUS:IP=%s]", szIP);
				dbgprintf("Malicious PTR record, IP = \"%s\" HOST = \"%s\"", szIP, szHname);
				iRet = RS_RET_MALICIOUS_HNAME;
			}
		} else {
			strcpy((char*)szHname, (char*)szIP);
		}
	} else {
		strcpy((char*)szHname, (char*)szIP);
	}

	/* We now have the names, so now let's allocate memory and store them permanently.
	 * (side note: we may hold on to these values for quite a while, thus we trim their
	 * memory consumption)
	 */
	len = strlen((char*)szIP) + 1; /* +1 for \0 byte */
	if((pThis->pRemHostIP = malloc(len)) == NULL)
		ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
	memcpy(pThis->pRemHostIP, szIP, len);

	len = strlen((char*)szHname) + 1; /* +1 for \0 byte */
	if((pThis->pRemHostName = malloc(len)) == NULL) {
		free(pThis->pRemHostIP); /* prevent leak */
		pThis->pRemHostIP = NULL;
		ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
	}
	memcpy(pThis->pRemHostName, szHname, len);

finalize_it:
	RETiRet;
}


/* accept an incoming connection request
 * rgerhards, 2008-04-22
 */
static rsRetVal
AcceptConnReq(nsd_t *pNsd, nsd_t **ppNew)
{
	int sockflags;
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;
	struct sockaddr_storage addr;
	socklen_t addrlen = sizeof(addr);
	nsd_ptcp_t *pNew = NULL;
	int iNewSock = -1;

	DEFiRet;
	assert(ppNew != NULL);
	ISOBJ_TYPE_assert(pThis, nsd_ptcp);

	iNewSock = accept(pThis->sock, (struct sockaddr*) &addr, &addrlen);
	if(iNewSock < 0) {
		ABORT_FINALIZE(RS_RET_ACCEPT_ERR);
	}

	/* construct our object so that we can use it... */
	CHKiRet(nsd_ptcpConstruct(&pNew));

	CHKiRet(FillRemHost(pNew, (struct sockaddr*) &addr));

	/* set the new socket to non-blocking IO -TODO:do we really need to do this here? Do we always want it? */
	if((sockflags = fcntl(iNewSock, F_GETFL)) != -1) {
		sockflags |= O_NONBLOCK;
		/* SETFL could fail too, so get it caught by the subsequent
		 * error check.
		 */
		sockflags = fcntl(iNewSock, F_SETFL, sockflags);
	}
	if(sockflags == -1) {
		dbgprintf("error %d setting fcntl(O_NONBLOCK) on tcp socket %d", errno, iNewSock);
		ABORT_FINALIZE(RS_RET_IO_ERROR);
	}

	pNew->sock = iNewSock;
	*ppNew = (nsd_t*) pNew;

finalize_it:
	if(iRet != RS_RET_OK) {
		if(pNew != NULL)
			nsd_ptcpDestruct(&pNew);
		/* the close may be redundant, but that doesn't hurt... */
		sockClose(&iNewSock);
	}

	RETiRet;
}


/* initialize tcp sockets for a listner. The initialized sockets are passed to the
 * app-level caller via a callback.
 * pLstnPort must point to a port name or number. NULL is NOT permitted. pLstnIP
 * points to the port to listen to (NULL means "all"), iMaxSess has the maximum
 * number of sessions permitted.
 * rgerhards, 2008-04-22
 */
static rsRetVal
LstnInit(netstrms_t *pNS, void *pUsr, rsRetVal(*fAddLstn)(void*,netstrm_t*),
	 uchar *pLstnPort, uchar *pLstnIP, int iSessMax)
{
	DEFiRet;
	netstrm_t *pNewStrm = NULL;
	nsd_t *pNewNsd = NULL;
        int error, maxs, on = 1;
	int sock;
	int numSocks;
	int sockflags;
        struct addrinfo hints, *res = NULL, *r;

	ISOBJ_TYPE_assert(pNS, netstrms);
	assert(fAddLstn != NULL);
	assert(pLstnPort != NULL);
	assert(iSessMax >= 0);

	dbgprintf("creating tcp listen socket on port %s\n", pLstnPort);

        memset(&hints, 0, sizeof(hints));
        hints.ai_flags = AI_PASSIVE;
        hints.ai_family = glbl.GetDefPFFamily();
        hints.ai_socktype = SOCK_STREAM;

        error = getaddrinfo((char*)pLstnIP, (char*) pLstnPort, &hints, &res);
        if(error) {
		dbgprintf("error %d querying port '%s'\n", error, pLstnPort);
		ABORT_FINALIZE(RS_RET_INVALID_PORT);
	}

        /* Count max number of sockets we may open */
        for(maxs = 0, r = res; r != NULL ; r = r->ai_next, maxs++)
		/* EMPTY */;

        numSocks = 0;   /* num of sockets counter at start of array */
	for(r = res; r != NULL ; r = r->ai_next) {
               sock = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
        	if(sock < 0) {
			if(!(r->ai_family == PF_INET6 && errno == EAFNOSUPPORT))
				dbgprintf("error %d creating tcp listen socket", errno);
				/* it is debatable if PF_INET with EAFNOSUPPORT should
				 * also be ignored...
				 */
                        continue;
                }

#ifdef IPV6_V6ONLY
                if(r->ai_family == AF_INET6) {
                	int iOn = 1;
			if(setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
			      (char *)&iOn, sizeof (iOn)) < 0) {
				close(sock);
				continue;
                	}
                }
#endif
       		if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) < 0 ) {
			dbgprintf("error %d setting tcp socket option\n", errno);
                        close(sock);
			continue;
		}

		/* We use non-blocking IO! */
		if((sockflags = fcntl(sock, F_GETFL)) != -1) {
			sockflags |= O_NONBLOCK;
			/* SETFL could fail too, so get it caught by the subsequent
			 * error check.
			 */
			sockflags = fcntl(sock, F_SETFL, sockflags);
		}
		if(sockflags == -1) {
			dbgprintf("error %d setting fcntl(O_NONBLOCK) on tcp socket", errno);
                        close(sock);
			continue;
		}



		/* We need to enable BSD compatibility. Otherwise an attacker
		 * could flood our log files by sending us tons of ICMP errors.
		 */
#ifndef BSD	
		if(net.should_use_so_bsdcompat()) {
			if (setsockopt(sock, SOL_SOCKET, SO_BSDCOMPAT,
					(char *) &on, sizeof(on)) < 0) {
				errmsg.LogError(NO_ERRCODE, "TCP setsockopt(BSDCOMPAT)");
                                close(sock);
				continue;
			}
		}
#endif

	        if( (bind(sock, r->ai_addr, r->ai_addrlen) < 0)
#ifndef IPV6_V6ONLY
		     && (errno != EADDRINUSE)
#endif
	           ) {
			/* TODO: check if *we* bound the socket - else we *have* an error! */
                        dbgprintf("error %d while binding tcp socket", errno);
                	close(sock);
                        continue;
                }

		if(listen(sock, iSessMax / 10 + 5) < 0) {
			/* If the listen fails, it most probably fails because we ask
			 * for a too-large backlog. So in this case we first set back
			 * to a fixed, reasonable, limit that should work. Only if
			 * that fails, too, we give up.
			 */
			dbgprintf("listen with a backlog of %d failed - retrying with default of 32.",
				   iSessMax / 10 + 5);
			if(listen(sock, 32) < 0) {
				dbgprintf("tcp listen error %d, suspending\n", errno);
	                	close(sock);
               		        continue;
			}
		}

		/* if we reach this point, we were able to obtain a valid socket, so we can
		 * construct a new netstrm obj and hand it over to the upper layers for inclusion
		 * into their socket array. -- rgerhards, 2008-04-23
		 */
		CHKiRet(pNS->Drvr.Construct(&pNewNsd));
		CHKiRet(pNS->Drvr.SetSock(pNewNsd, sock));
		CHKiRet(pNS->Drvr.SetMode(pNewNsd, netstrms.GetDrvrMode(pNS)));
		CHKiRet(netstrms.CreateStrm(pNS, &pNewStrm));
		pNewStrm->pDrvrData = (nsd_t*) pNewNsd;
		CHKiRet(fAddLstn(pUsr, pNewStrm));
		pNewNsd = NULL;
		pNewStrm = NULL;
		++numSocks;
	}

	if(numSocks != maxs)
		dbgprintf("We could initialize %d TCP listen sockets out of %d we received "
		 	  "- this may or may not be an error indication.\n", numSocks, maxs);

        if(numSocks == 0) {
		dbgprintf("No TCP listen sockets could successfully be initialized");
		ABORT_FINALIZE(RS_RET_COULD_NOT_BIND);
	}

finalize_it:
	if(res != NULL)
		freeaddrinfo(res);

	if(iRet != RS_RET_OK) {
		if(pNewStrm != NULL)
			netstrm.Destruct(&pNewStrm);
		if(pNewNsd != NULL)
			pNS->Drvr.Destruct(&pNewNsd);
	}

	RETiRet;
}


/* receive data from a tcp socket
 * The lenBuf parameter must contain the max buffer size on entry and contains
 * the number of octets read (or -1 in case of error) on exit. This function
 * never blocks, not even when called on a blocking socket. That is important
 * for client sockets, which are set to block during send, but should not
 * block when trying to read data. If *pLenBuf is -1, an error occured and
 * errno holds the exact error cause.
 * rgerhards, 2008-03-17
 */
static rsRetVal
Rcv(nsd_t *pNsd, uchar *pRcvBuf, ssize_t *pLenBuf)
{
	DEFiRet;
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;
	ISOBJ_TYPE_assert(pThis, nsd_ptcp);

	*pLenBuf = recv(pThis->sock, pRcvBuf, *pLenBuf, MSG_DONTWAIT);

	RETiRet;
}


/* send a buffer. On entry, pLenBuf contains the number of octets to
 * write. On exit, it contains the number of octets actually written.
 * If this number is lower than on entry, only a partial buffer has
 * been written.
 * rgerhards, 2008-03-19
 */
static rsRetVal
Send(nsd_t *pNsd, uchar *pBuf, ssize_t *pLenBuf)
{
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;
	ssize_t written;
	DEFiRet;
	ISOBJ_TYPE_assert(pThis, nsd_ptcp);

	written = send(pThis->sock, pBuf, *pLenBuf, 0);

	if(written == -1) {
		switch(errno) {
			case EAGAIN:
			case EINTR:
				/* this is fine, just retry... */
				written = 0;
				break;
			default:
				ABORT_FINALIZE(RS_RET_IO_ERROR);
				break;
		}
	}

	*pLenBuf = written;
finalize_it:
	RETiRet;
}


/* open a connection to a remote host (server).
 * rgerhards, 2008-03-19
 */
static rsRetVal
Connect(nsd_t *pNsd, int family, uchar *port, uchar *host)
{
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;
	struct addrinfo *res = NULL;
	struct addrinfo hints;

	DEFiRet;
	ISOBJ_TYPE_assert(pThis, nsd_ptcp);
	assert(port != NULL);
	assert(host != NULL);
	assert(pThis->sock == -1);

	memset(&hints, 0, sizeof(hints));
	hints.ai_family = family;
	hints.ai_socktype = SOCK_STREAM;
	if(getaddrinfo((char*)host, (char*)port, &hints, &res) != 0) {
		dbgprintf("error %d in getaddrinfo\n", errno);
		ABORT_FINALIZE(RS_RET_IO_ERROR);
	}
	
	if((pThis->sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1) {
		ABORT_FINALIZE(RS_RET_IO_ERROR);
	}

	if(connect(pThis->sock, res->ai_addr, res->ai_addrlen) != 0) {
		ABORT_FINALIZE(RS_RET_IO_ERROR);
	}

finalize_it:
	if(res != NULL)
               freeaddrinfo(res);
		
	if(iRet != RS_RET_OK) {
		sockClose(&pThis->sock);
	}

	RETiRet;
}


/* get the remote hostname. The returned hostname must be freed by the
 * caller.
 * rgerhards, 2008-04-24
 */
static rsRetVal
GetRemoteHName(nsd_t *pNsd, uchar **ppszHName)
{
	DEFiRet;
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;
	ISOBJ_TYPE_assert(pThis, nsd_ptcp);
	assert(ppszHName != NULL);

	// TODO: how can the RemHost be empty?
	CHKmalloc(*ppszHName = (uchar*)strdup(pThis->pRemHostName == NULL ? "" : (char*) pThis->pRemHostName));

finalize_it:
	RETiRet;
}


/* get the remote host's IP address. The returned string must be freed by the
 * caller.
 * rgerhards, 2008-04-24
 */
static rsRetVal
GetRemoteIP(nsd_t *pNsd, uchar **ppszIP)
{
	DEFiRet;
	nsd_ptcp_t *pThis = (nsd_ptcp_t*) pNsd;
	ISOBJ_TYPE_assert(pThis, nsd_ptcp);
	assert(ppszIP != NULL);

	CHKmalloc(*ppszIP = (uchar*)strdup(pThis->pRemHostIP == NULL ? "" : (char*) pThis->pRemHostIP));

finalize_it:
	RETiRet;
}


/* queryInterface function */
BEGINobjQueryInterface(nsd_ptcp)
CODESTARTobjQueryInterface(nsd_ptcp)
	if(pIf->ifVersion != nsdCURR_IF_VERSION) {/* check for current version, increment on each change */
		ABORT_FINALIZE(RS_RET_INTERFACE_NOT_SUPPORTED);
	}

	/* ok, we have the right interface, so let's fill it
	 * Please note that we may also do some backwards-compatibility
	 * work here (if we can support an older interface version - that,
	 * of course, also affects the "if" above).
	 */
	pIf->Construct = (rsRetVal(*)(nsd_t**)) nsd_ptcpConstruct;
	pIf->Destruct = (rsRetVal(*)(nsd_t**)) nsd_ptcpDestruct;
	pIf->Abort = Abort;
	pIf->GetSock = GetSock;
	pIf->SetSock = SetSock;
	pIf->SetMode = SetMode;
	pIf->Rcv = Rcv;
	pIf->Send = Send;
	pIf->LstnInit = LstnInit;
	pIf->AcceptConnReq = AcceptConnReq;
	pIf->Connect = Connect;
	pIf->GetRemoteHName = GetRemoteHName;
	pIf->GetRemoteIP = GetRemoteIP;
finalize_it:
ENDobjQueryInterface(nsd_ptcp)


/* exit our class
 */
BEGINObjClassExit(nsd_ptcp, OBJ_IS_LOADABLE_MODULE) /* CHANGE class also in END MACRO! */
CODESTARTObjClassExit(nsd_ptcp)
	/* release objects we no longer need */
	objRelease(net, CORE_COMPONENT);
	objRelease(glbl, CORE_COMPONENT);
	objRelease(errmsg, CORE_COMPONENT);
	objRelease(netstrm, DONT_LOAD_LIB);
	objRelease(netstrms, LM_NETSTRMS_FILENAME);
ENDObjClassExit(nsd_ptcp)


/* Initialize the nsd_ptcp class. Must be called as the very first method
 * before anything else is called inside this class.
 * rgerhards, 2008-02-19
 */
BEGINObjClassInit(nsd_ptcp, 1, OBJ_IS_LOADABLE_MODULE) /* class, version */
	/* request objects we use */
	CHKiRet(objUse(errmsg, CORE_COMPONENT));
	CHKiRet(objUse(glbl, CORE_COMPONENT));
	CHKiRet(objUse(net, CORE_COMPONENT));
	CHKiRet(objUse(netstrms, LM_NETSTRMS_FILENAME));
	CHKiRet(objUse(netstrm, DONT_LOAD_LIB));

	/* set our own handlers */
ENDObjClassInit(nsd_ptcp)


/* --------------- here now comes the plumbing that makes as a library module --------------- */


BEGINmodExit
CODESTARTmodExit
	nsdsel_ptcpClassExit();
	nsd_ptcpClassExit();
ENDmodExit


BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_LIB_QUERIES
ENDqueryEtryPt


BEGINmodInit()
CODESTARTmodInit
	*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */

	/* Initialize all classes that are in our module - this includes ourselfs */
	CHKiRet(nsd_ptcpClassInit(pModInfo)); /* must be done after tcps_sess, as we use it */
	CHKiRet(nsdsel_ptcpClassInit(pModInfo)); /* must be done after tcps_sess, as we use it */
ENDmodInit
/* vi:set ai:
 */