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1 /* -*- Mode: C; tab-width: 4 -*-
2 *
3 * Copyright (c) 2002-2003 Apple Computer, Inc. All rights reserved.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16
17 Contains: mDNS platform plugin for VxWorks.
18
19 Copyright: Copyright (C) 2002-2004 Apple Computer, Inc., All Rights Reserved.
20
21 Notes for non-Apple platforms:
22
23 TARGET_NON_APPLE should be defined to 1 to avoid relying on Apple-only header files, macros, or functions.
24
25 To Do:
26
27 - Add support for IPv6 (needs VxWorks IPv6 support).
28 */
29
30 // Set up the debug library to use the default category (see DebugServicesLite.h for details).
31
32 #if ( !TARGET_NON_APPLE )
33 #define DEBUG_USE_DEFAULT_CATEGORY 1
34 #endif
35
36 #include <stdarg.h>
37 #include <stddef.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41
42 #include <sys/types.h>
43 #include <arpa/inet.h>
44 #include <fcntl.h>
45 #include <netinet/if_ether.h>
46 #include <netinet/in.h>
47 #include <netinet/ip.h>
48 #include <sys/ioctl.h>
49 #include <sys/socket.h>
50 #include <unistd.h>
51
52 #include "vxWorks.h"
53 #include "ifLib.h"
54 #include "inetLib.h"
55 #include "pipeDrv.h"
56 #include "selectLib.h"
57 #include "semLib.h"
58 #include "sockLib.h"
59 #include "sysLib.h"
60 #include "taskLib.h"
61 #include "tickLib.h"
62
63 #include "config.h"
64
65 #if ( !TARGET_NON_APPLE )
66 #include "ACP/ACPUtilities.h"
67 #include "Support/DebugServicesLite.h"
68 #include "Support/MiscUtilities.h"
69 #endif
70
71 #include "mDNSEmbeddedAPI.h"
72
73 #include "mDNSVxWorks.h"
74
75 #if 0
76 #pragma mark == Preprocessor ==
77 #endif
78
79 //===========================================================================================================================
80 // Preprocessor
81 //===========================================================================================================================
82
83 #if ( !TARGET_NON_APPLE )
84 debug_log_new_default_category( mdns );
85 #endif
86
87 #if 0
88 #pragma mark == Constants ==
89 #endif
90
91 //===========================================================================================================================
92 // Constants
93 //===========================================================================================================================
94
95 #define DEBUG_NAME "[mDNS] "
96
97 #define kMDNSDefaultName "My-Device"
98
99 #define kMDNSTaskName "tMDNS"
100 #define kMDNSTaskPriority 102
101 #define kMDNSTaskStackSize 49152
102
103 #define kMDNSPipeName "/pipe/mDNS"
104 #define kMDNSPipeMessageQueueSize 32
105 #define kMDNSPipeMessageSize 1
106
107 #define kInvalidSocketRef -1
108
109 typedef uint8_t MDNSPipeCommandCode;
110 enum
111 {
112 kMDNSPipeCommandCodeInvalid = 0,
113 kMDNSPipeCommandCodeReschedule = 1,
114 kMDNSPipeCommandCodeReconfigure = 2,
115 kMDNSPipeCommandCodeQuit = 3
116 };
117
118 #if 0
119 #pragma mark == Structures ==
120 #endif
121
122 //===========================================================================================================================
123 // Structures
124 //===========================================================================================================================
125
126 typedef int MDNSSocketRef;
127
128 struct MDNSInterfaceItem
129 {
130 MDNSInterfaceItem * next;
131 char name[ 32 ];
132 MDNSSocketRef multicastSocketRef;
133 MDNSSocketRef sendingSocketRef;
134 NetworkInterfaceInfo hostSet;
135 mDNSBool hostRegistered;
136
137 int sendMulticastCounter;
138 int sendUnicastCounter;
139 int sendErrorCounter;
140
141 int recvCounter;
142 int recvErrorCounter;
143 int recvLoopCounter;
144 };
145
146 #if 0
147 #pragma mark == Macros ==
148 #endif
149
150 //===========================================================================================================================
151 // Macros
152 //===========================================================================================================================
153
154 #if ( TARGET_NON_APPLE )
155
156 // Do-nothing versions of the debugging macros for non-Apple platforms.
157
158 #define check(assertion)
159 #define check_string( assertion, cstring )
160 #define check_noerr(err)
161 #define check_noerr_string( error, cstring )
162 #define check_errno( assertion, errno_value )
163 #define debug_string( cstring )
164 #define require( assertion, label ) do { if( !(assertion) ) goto label;} while(0)
165 #define require_string( assertion, label, string ) require(assertion, label)
166 #define require_quiet( assertion, label ) require( assertion, label )
167 #define require_noerr( error, label ) do { if( (error) != 0 ) goto label;} while(0)
168 #define require_noerr_quiet( assertion, label ) require_noerr( assertion, label )
169 #define require_noerr_action( error, label, action ) do { if( (error) != 0 ) { {action;}; goto label; } } while(0)
170 #define require_noerr_action_quiet( assertion, label, action ) require_noerr_action( assertion, label, action )
171 #define require_action( assertion, label, action ) do { if( !(assertion) ) { {action;}; goto label; } } while(0)
172 #define require_action_quiet( assertion, label, action ) require_action( assertion, label, action )
173 #define require_action_string( assertion, label, action, cstring ) do { if( !(assertion) ) { {action;}; goto label; } } while(0)
174 #define require_errno( assertion, errno_value, label ) do { if( !(assertion) ) goto label;} while(0)
175 #define require_errno_action( assertion, errno_value, label, action ) do { if( !(assertion) ) { {action;}; goto label; } } while(0)
176
177 #define dlog( ARGS... )
178
179 #define DEBUG_UNUSED( X ) (void)( X )
180 #endif
181
182 #if 0
183 #pragma mark == Prototypes ==
184 #endif
185
186 //===========================================================================================================================
187 // Prototypes
188 //===========================================================================================================================
189
190 // ifIndexToIfp is in net/if.c, but not exported by net/if.h so provide it here.
191
192 extern struct ifnet * ifIndexToIfp(int ifIndex);
193
194 // Platform Internals
195
196 mDNSlocal void SetupNames( mDNS * const inMDNS );
197 mDNSlocal mStatus SetupInterfaceList( mDNS * const inMDNS );
198 mDNSlocal mStatus TearDownInterfaceList( mDNS * const inMDNS );
199 mDNSlocal mStatus SetupInterface( mDNS * const inMDNS, const struct ifaddrs *inAddr, MDNSInterfaceItem **outItem );
200 mDNSlocal mStatus TearDownInterface( mDNS * const inMDNS, MDNSInterfaceItem *inItem );
201 mDNSlocal mStatus
202 SetupSocket(
203 mDNS * const inMDNS,
204 const struct ifaddrs * inAddr,
205 mDNSIPPort inPort,
206 MDNSSocketRef * outSocketRef );
207
208 // Commands
209
210 mDNSlocal mStatus SetupCommandPipe( mDNS * const inMDNS );
211 mDNSlocal mStatus TearDownCommandPipe( mDNS * const inMDNS );
212 mDNSlocal mStatus SendCommand( const mDNS * const inMDNS, MDNSPipeCommandCode inCommandCode );
213 mDNSlocal mStatus ProcessCommand( mDNS * const inMDNS );
214 mDNSlocal void ProcessCommandReconfigure( mDNS *inMDNS );
215
216 // Threads
217
218 mDNSlocal mStatus SetupTask( mDNS * const inMDNS );
219 mDNSlocal mStatus TearDownTask( mDNS * const inMDNS );
220 mDNSlocal void Task( mDNS *inMDNS );
221 mDNSlocal mStatus TaskInit( mDNS *inMDNS );
222 mDNSlocal void TaskSetupReadSet( mDNS *inMDNS, fd_set *outReadSet, int *outMaxSocket );
223 mDNSlocal void TaskSetupTimeout( mDNS *inMDNS, mDNSs32 inNextTaskTime, struct timeval *outTimeout );
224 mDNSlocal void TaskProcessPacket( mDNS *inMDNS, MDNSInterfaceItem *inItem, MDNSSocketRef inSocketRef );
225
226 // Utilities
227
228 #if ( TARGET_NON_APPLE )
229 mDNSlocal void GenerateUniqueHostName( char *outName, long *ioSeed );
230 mDNSlocal void GenerateUniqueDNSName( char *outName, long *ioSeed );
231 #endif
232
233 // Platform Accessors
234
235 #ifdef __cplusplus
236 extern "C" {
237 #endif
238
239 typedef struct mDNSPlatformInterfaceInfo mDNSPlatformInterfaceInfo;
240 struct mDNSPlatformInterfaceInfo
241 {
242 const char * name;
243 mDNSAddr ip;
244 };
245
246 mDNSexport mStatus mDNSPlatformInterfaceNameToID( mDNS * const inMDNS, const char *inName, mDNSInterfaceID *outID );
247 mDNSexport mStatus mDNSPlatformInterfaceIDToInfo( mDNS * const inMDNS, mDNSInterfaceID inID, mDNSPlatformInterfaceInfo *outInfo );
248
249 #ifdef __cplusplus
250 }
251 #endif
252
253 #if 0
254 #pragma mark == Globals ==
255 #endif
256
257 //===========================================================================================================================
258 // Globals
259 //===========================================================================================================================
260
261 mDNSlocal mDNS * gMDNSPtr = NULL;
262 mDNSlocal mDNS_PlatformSupport gMDNSPlatformSupport;
263 mDNSlocal mDNSs32 gMDNSTicksToMicrosecondsMultiplier = 0;
264
265 // Platform support
266
267 mDNSs32 mDNSPlatformOneSecond;
268
269 #if 0
270 #pragma mark -
271 #pragma mark == Public APIs ==
272 #endif
273
274 //===========================================================================================================================
275 // mDNSReconfigure
276 //===========================================================================================================================
277
278 void mDNSReconfigure( void )
279 {
280 // Send a "reconfigure" command to the MDNS task.
281
282 if( gMDNSPtr )
283 {
284 SendCommand( gMDNSPtr, kMDNSPipeCommandCodeReconfigure );
285 }
286 }
287
288 #if 0
289 #pragma mark -
290 #pragma mark == Platform Support ==
291 #endif
292
293 //===========================================================================================================================
294 // mDNSPlatformInit
295 //===========================================================================================================================
296
297 mStatus mDNSPlatformInit( mDNS * const inMDNS )
298 {
299 mStatus err;
300
301 dlog( kDebugLevelInfo, DEBUG_NAME "platform init\n" );
302
303 // Initialize variables.
304
305 mDNSPlatformMemZero( &gMDNSPlatformSupport, sizeof( gMDNSPlatformSupport ) );
306 inMDNS->p = &gMDNSPlatformSupport;
307 inMDNS->p->commandPipe = ERROR;
308 inMDNS->p->task = ERROR;
309 inMDNS->p->rescheduled = 1; // Default to rescheduled until fully initialized.
310 mDNSPlatformOneSecond = sysClkRateGet();
311 gMDNSTicksToMicrosecondsMultiplier = ( 1000000L / mDNSPlatformOneSecond );
312
313 // Allocate semaphores.
314
315 inMDNS->p->lockID = semMCreate( SEM_Q_FIFO );
316 require_action( inMDNS->p->lockID, exit, err = mStatus_NoMemoryErr );
317
318 inMDNS->p->readyEvent = semBCreate( SEM_Q_FIFO, SEM_EMPTY );
319 require_action( inMDNS->p->readyEvent, exit, err = mStatus_NoMemoryErr );
320
321 inMDNS->p->quitEvent = semBCreate( SEM_Q_FIFO, SEM_EMPTY );
322 require_action( inMDNS->p->quitEvent, exit, err = mStatus_NoMemoryErr );
323
324 gMDNSPtr = inMDNS;
325
326 // Set up the task and wait for it to initialize. Initialization is done from the task instead of here to avoid
327 // stack space issues. Some of the initialization may require a larger stack than the current task supports.
328
329 err = SetupTask( inMDNS );
330 require_noerr( err, exit );
331
332 err = semTake( inMDNS->p->readyEvent, WAIT_FOREVER );
333 require_noerr( err, exit );
334 err = inMDNS->p->taskInitErr;
335 require_noerr( err, exit );
336
337 mDNSCoreInitComplete( inMDNS, err );
338
339 exit:
340 if( err )
341 {
342 mDNSPlatformClose( inMDNS );
343 }
344 dlog( kDebugLevelInfo, DEBUG_NAME "platform init done (err=%ld)\n", err );
345 return( err );
346 }
347
348 //===========================================================================================================================
349 // mDNSPlatformClose
350 //===========================================================================================================================
351
352 void mDNSPlatformClose( mDNS * const inMDNS )
353 {
354 mStatus err;
355
356 dlog( kDebugLevelInfo, DEBUG_NAME "platform close\n" );
357 check( inMDNS );
358
359 // Tear everything down.
360
361 err = TearDownTask( inMDNS );
362 check_noerr( err );
363
364 err = TearDownInterfaceList( inMDNS );
365 check_noerr( err );
366
367 err = TearDownCommandPipe( inMDNS );
368 check_noerr( err );
369
370 gMDNSPtr = NULL;
371
372 // Release semaphores.
373
374 if( inMDNS->p->quitEvent )
375 {
376 semDelete( inMDNS->p->quitEvent );
377 inMDNS->p->quitEvent = 0;
378 }
379 if( inMDNS->p->readyEvent )
380 {
381 semDelete( inMDNS->p->readyEvent );
382 inMDNS->p->readyEvent = 0;
383 }
384 if( inMDNS->p->lockID )
385 {
386 semDelete( inMDNS->p->lockID );
387 inMDNS->p->lockID = 0;
388 }
389
390 dlog( kDebugLevelInfo, DEBUG_NAME "platform close done\n" );
391 }
392
393 //===========================================================================================================================
394 // mDNSPlatformSendUDP
395 //===========================================================================================================================
396
397 mStatus
398 mDNSPlatformSendUDP(
399 const mDNS * const inMDNS,
400 const void * const inMsg,
401 const mDNSu8 * const inMsgEnd,
402 mDNSInterfaceID inInterfaceID,
403 const mDNSAddr * inDstIP,
404 mDNSIPPort inDstPort )
405 {
406 mStatus err;
407 MDNSInterfaceItem * item;
408 struct sockaddr_in addr;
409 int n;
410
411 dlog( kDebugLevelChatty, DEBUG_NAME "platform send UDP\n" );
412
413 // Check parameters.
414
415 check( inMDNS );
416 check( inMsg );
417 check( inMsgEnd );
418 check( inInterfaceID );
419 check( inDstIP );
420 if( inDstIP->type != mDNSAddrType_IPv4 )
421 {
422 err = mStatus_BadParamErr;
423 goto exit;
424 }
425
426 #if ( DEBUG )
427 // Make sure the InterfaceID is valid.
428
429 for( item = inMDNS->p->interfaceList; item; item = item->next )
430 {
431 if( item == (MDNSInterfaceItem *) inInterfaceID )
432 {
433 break;
434 }
435 }
436 require_action( item, exit, err = mStatus_NoSuchNameErr );
437 #endif
438
439 // Send the packet.
440
441 item = (MDNSInterfaceItem *) inInterfaceID;
442 check( item->sendingSocketRef != kInvalidSocketRef );
443
444 mDNSPlatformMemZero( &addr, sizeof( addr ) );
445 addr.sin_family = AF_INET;
446 addr.sin_port = inDstPort.NotAnInteger;
447 addr.sin_addr.s_addr = inDstIP->ip.v4.NotAnInteger;
448
449 n = inMsgEnd - ( (const mDNSu8 * const) inMsg );
450 n = sendto( item->sendingSocketRef, (char *) inMsg, n, 0, (struct sockaddr *) &addr, sizeof( addr ) );
451 check_errno( n, errno );
452
453 item->sendErrorCounter += ( n < 0 );
454 item->sendMulticastCounter += ( inDstPort.NotAnInteger == MulticastDNSPort.NotAnInteger );
455 item->sendUnicastCounter += ( inDstPort.NotAnInteger != MulticastDNSPort.NotAnInteger );
456
457 dlog( kDebugLevelChatty, DEBUG_NAME "sent (to=%u.%u.%u.%u:%hu)\n",
458 inDstIP->ip.v4.b[ 0 ], inDstIP->ip.v4.b[ 1 ], inDstIP->ip.v4.b[ 2 ], inDstIP->ip.v4.b[ 3 ],
459 htons( inDstPort.NotAnInteger ) );
460 err = mStatus_NoError;
461
462 exit:
463 dlog( kDebugLevelChatty, DEBUG_NAME "platform send UDP done\n" );
464 return( err );
465 }
466
467 //===========================================================================================================================
468 // Connection-oriented (TCP) functions
469 //===========================================================================================================================
470
471 mDNSexport mStatus mDNSPlatformTCPConnect(const mDNSAddr *dst, mDNSOpaque16 dstport, mDNSInterfaceID InterfaceID,
472 TCPConnectionCallback callback, void *context, int *descriptor)
473 {
474 (void)dst; // Unused
475 (void)dstport; // Unused
476 (void)InterfaceID; // Unused
477 (void)callback; // Unused
478 (void)context; // Unused
479 (void)descriptor; // Unused
480 return(mStatus_UnsupportedErr);
481 }
482
483 mDNSexport void mDNSPlatformTCPCloseConnection(int sd)
484 {
485 (void)sd; // Unused
486 }
487
488 mDNSexport long mDNSPlatformReadTCP(int sd, void *buf, unsigned long buflen)
489 {
490 (void)sd; // Unused
491 (void)buf; // Unused
492 (void)buflen; // Unused
493 return(0);
494 }
495
496 mDNSexport long mDNSPlatformWriteTCP(int sd, const char *msg, unsigned long len)
497 {
498 (void)sd; // Unused
499 (void)msg; // Unused
500 (void)len; // Unused
501 return(0);
502 }
503
504 //===========================================================================================================================
505 // mDNSPlatformLock
506 //===========================================================================================================================
507
508 void mDNSPlatformLock( const mDNS * const inMDNS )
509 {
510 check( inMDNS->p->lockID );
511
512 if( inMDNS->p->lockID )
513 {
514 #if ( TARGET_NON_APPLE )
515 semTake( inMDNS->p->lockID, WAIT_FOREVER );
516 #else
517 semTakeDeadlockDetect( inMDNS->p->lockID, WAIT_FOREVER );
518 #endif
519 }
520 }
521
522 //===========================================================================================================================
523 // mDNSPlatformUnlock
524 //===========================================================================================================================
525
526 void mDNSPlatformUnlock( const mDNS * const inMDNS )
527 {
528 check( inMDNS );
529 check( inMDNS->p );
530 check( inMDNS->p->lockID );
531 check_string( inMDNS->p->task != ERROR, "mDNS task not started" );
532
533 // When an API routine is called, "m->NextScheduledEvent" is reset to "timenow" before calling mDNSPlatformUnlock()
534 // Since our main mDNS_Execute() loop is on a different thread, we need to wake up that thread to:
535 // (a) handle immediate work (if any) resulting from this API call
536 // (b) calculate the next sleep time between now and the next interesting event
537
538 if( ( mDNS_TimeNow(inMDNS) - inMDNS->NextScheduledEvent ) >= 0 )
539 {
540 // We only need to send the reschedule event when called from a task other than the mDNS task since if we are
541 // called from mDNS task, we'll loop back and call mDNS_Execute. This avoids filling up the command queue.
542
543 if( ( inMDNS->p->rescheduled++ == 0 ) && ( taskIdSelf() != inMDNS->p->task ) )
544 {
545 SendCommand( inMDNS, kMDNSPipeCommandCodeReschedule );
546 }
547 }
548
549 if( inMDNS->p->lockID )
550 {
551 semGive( inMDNS->p->lockID );
552 }
553 }
554
555 //===========================================================================================================================
556 // mDNSPlatformStrLen
557 //===========================================================================================================================
558
559 mDNSu32 mDNSPlatformStrLen( const void *inSrc )
560 {
561 check( inSrc );
562
563 return( (mDNSu32) strlen( (const char *) inSrc ) );
564 }
565
566 //===========================================================================================================================
567 // mDNSPlatformStrCopy
568 //===========================================================================================================================
569
570 void mDNSPlatformStrCopy( void *inDst, const void *inSrc )
571 {
572 check( inSrc );
573 check( inDst );
574
575 strcpy( (char *) inDst, (const char*) inSrc );
576 }
577
578 //===========================================================================================================================
579 // mDNSPlatformMemCopy
580 //===========================================================================================================================
581
582 void mDNSPlatformMemCopy( void *inDst, const void *inSrc, mDNSu32 inSize )
583 {
584 check( inSrc );
585 check( inDst );
586
587 memcpy( inDst, inSrc, inSize );
588 }
589
590 //===========================================================================================================================
591 // mDNSPlatformMemSame
592 //===========================================================================================================================
593
594 mDNSBool mDNSPlatformMemSame( const void *inDst, const void *inSrc, mDNSu32 inSize )
595 {
596 check( inSrc );
597 check( inDst );
598
599 return( memcmp( inSrc, inDst, inSize ) == 0 );
600 }
601
602 //===========================================================================================================================
603 // mDNSPlatformMemZero
604 //===========================================================================================================================
605
606 void mDNSPlatformMemZero( void *inDst, mDNSu32 inSize )
607 {
608 check( inDst );
609
610 memset( inDst, 0, inSize );
611 }
612
613 //===========================================================================================================================
614 // mDNSPlatformMemAllocate
615 //===========================================================================================================================
616
617 mDNSexport void * mDNSPlatformMemAllocate( mDNSu32 inSize )
618 {
619 void * mem;
620
621 check( inSize > 0 );
622
623 mem = malloc( inSize );
624 check( mem );
625
626 return( mem );
627 }
628
629 //===========================================================================================================================
630 // mDNSPlatformMemFree
631 //===========================================================================================================================
632
633 mDNSexport void mDNSPlatformMemFree( void *inMem )
634 {
635 check( inMem );
636
637 free( inMem );
638 }
639
640 //===========================================================================================================================
641 // mDNSPlatformRandomSeed
642 //===========================================================================================================================
643
644 mDNSexport mDNSu32 mDNSPlatformRandomSeed(void)
645 {
646 return( tickGet() );
647 }
648
649 //===========================================================================================================================
650 // mDNSPlatformTimeInit
651 //===========================================================================================================================
652
653 mDNSexport mStatus mDNSPlatformTimeInit( void )
654 {
655 // No special setup is required on VxWorks -- we just use tickGet().
656 return( mStatus_NoError );
657 }
658
659 //===========================================================================================================================
660 // mDNSPlatformRawTime
661 //===========================================================================================================================
662
663 mDNSs32 mDNSPlatformRawTime( void )
664 {
665 return( (mDNSs32) tickGet() );
666 }
667
668 //===========================================================================================================================
669 // mDNSPlatformUTC
670 //===========================================================================================================================
671
672 mDNSexport mDNSs32 mDNSPlatformUTC( void )
673 {
674 return( -1 );
675 }
676
677 //===========================================================================================================================
678 // mDNSPlatformInterfaceNameToID
679 //===========================================================================================================================
680
681 mStatus mDNSPlatformInterfaceNameToID( mDNS * const inMDNS, const char *inName, mDNSInterfaceID *outID )
682 {
683 mStatus err;
684 MDNSInterfaceItem * ifd;
685
686 check( inMDNS );
687 check( inMDNS->p );
688 check( inName );
689
690 // Search for an interface with the specified name,
691
692 for( ifd = inMDNS->p->interfaceList; ifd; ifd = ifd->next )
693 {
694 if( strcmp( ifd->name, inName ) == 0 )
695 {
696 break;
697 }
698 }
699 if( !ifd )
700 {
701 err = mStatus_NoSuchNameErr;
702 goto exit;
703 }
704
705 // Success!
706
707 if( outID )
708 {
709 *outID = (mDNSInterfaceID) ifd;
710 }
711 err = mStatus_NoError;
712
713 exit:
714 return( err );
715 }
716
717 //===========================================================================================================================
718 // mDNSPlatformInterfaceIDToInfo
719 //===========================================================================================================================
720
721 mStatus mDNSPlatformInterfaceIDToInfo( mDNS * const inMDNS, mDNSInterfaceID inID, mDNSPlatformInterfaceInfo *outInfo )
722 {
723 mStatus err;
724 MDNSInterfaceItem * ifd;
725
726 check( inMDNS );
727 check( inID );
728 check( outInfo );
729
730 // Search for an interface with the specified ID,
731
732 for( ifd = inMDNS->p->interfaceList; ifd; ifd = ifd->next )
733 {
734 if( ifd == (MDNSInterfaceItem *) inID )
735 {
736 break;
737 }
738 }
739 if( !ifd )
740 {
741 err = mStatus_NoSuchNameErr;
742 goto exit;
743 }
744
745 // Success!
746
747 outInfo->name = ifd->name;
748 outInfo->ip = ifd->hostSet.ip;
749 err = mStatus_NoError;
750
751 exit:
752 return( err );
753 }
754
755 //===========================================================================================================================
756 // debugf_
757 //===========================================================================================================================
758
759 #if ( MDNS_DEBUGMSGS )
760 mDNSexport void debugf_( const char *format, ... )
761 {
762 char buffer[ 512 ];
763 va_list args;
764 mDNSu32 length;
765
766 va_start( args, format );
767 length = mDNS_vsnprintf( buffer, sizeof( buffer ), format, args );
768 va_end( args );
769
770 dlog( kDebugLevelInfo, "%s\n", buffer );
771 }
772 #endif
773
774 //===========================================================================================================================
775 // verbosedebugf_
776 //===========================================================================================================================
777
778 #if ( MDNS_DEBUGMSGS > 1 )
779 mDNSexport void verbosedebugf_( const char *format, ... )
780 {
781 char buffer[ 512 ];
782 va_list args;
783 mDNSu32 length;
784
785 va_start( args, format );
786 length = mDNS_vsnprintf( buffer, sizeof( buffer ), format, args );
787 va_end( args );
788
789 dlog( kDebugLevelVerbose, "%s\n", buffer );
790 }
791 #endif
792
793 //===========================================================================================================================
794 // LogMsg
795 //===========================================================================================================================
796
797 void LogMsg( const char *inFormat, ... )
798 {
799 char buffer[ 512 ];
800 va_list args;
801 mDNSu32 length;
802
803 va_start( args, inFormat );
804 length = mDNS_vsnprintf( buffer, sizeof( buffer ), inFormat, args );
805 va_end( args );
806
807 dlog( kDebugLevelWarning, "%s\n", buffer );
808 }
809
810 #if 0
811 #pragma mark -
812 #pragma mark == Platform Internals ==
813 #endif
814
815 //===========================================================================================================================
816 // SetupNames
817 //===========================================================================================================================
818
819 mDNSlocal void SetupNames( mDNS * const inMDNS )
820 {
821 char tempCString[ 128 ];
822 mDNSu8 tempPString[ 128 ];
823 mDNSu8 * namePtr;
824
825 // Set up the host name.
826
827 tempCString[ 0 ] = '\0';
828 GenerateUniqueHostName( tempCString, NULL );
829 check( tempCString[ 0 ] != '\0' );
830 if( tempCString[ 0 ] == '\0' )
831 {
832 // No name so use the default.
833
834 strcpy( tempCString, kMDNSDefaultName );
835 }
836 inMDNS->nicelabel.c[ 0 ] = strlen( tempCString );
837 memcpy( &inMDNS->nicelabel.c[ 1 ], tempCString, inMDNS->nicelabel.c[ 0 ] );
838 check( inMDNS->nicelabel.c[ 0 ] > 0 );
839
840 // Set up the DNS name.
841
842 tempCString[ 0 ] = '\0';
843 GenerateUniqueDNSName( tempCString, NULL );
844 if( tempCString[ 0 ] != '\0' )
845 {
846 tempPString[ 0 ] = strlen( tempCString );
847 memcpy( &tempPString[ 1 ], tempCString, tempPString[ 0 ] );
848 namePtr = tempPString;
849 }
850 else
851 {
852 // No DNS name so use the host name.
853
854 namePtr = inMDNS->nicelabel.c;
855 }
856 ConvertUTF8PstringToRFC1034HostLabel( namePtr, &inMDNS->hostlabel );
857 if( inMDNS->hostlabel.c[ 0 ] == 0 )
858 {
859 // Nice name has no characters that are representable as an RFC 1034 name (e.g. Japanese) so use the default.
860
861 MakeDomainLabelFromLiteralString( &inMDNS->hostlabel, kMDNSDefaultName );
862 }
863 check( inMDNS->hostlabel.c[ 0 ] > 0 );
864
865 mDNS_SetFQDN( inMDNS );
866
867 dlog( kDebugLevelInfo, DEBUG_NAME "nice name \"%.*s\"\n", inMDNS->nicelabel.c[ 0 ], &inMDNS->nicelabel.c[ 1 ] );
868 dlog( kDebugLevelInfo, DEBUG_NAME "host name \"%.*s\"\n", inMDNS->hostlabel.c[ 0 ], &inMDNS->hostlabel.c[ 1 ] );
869 }
870
871 //===========================================================================================================================
872 // SetupInterfaceList
873 //===========================================================================================================================
874
875 mDNSlocal mStatus SetupInterfaceList( mDNS * const inMDNS )
876 {
877 mStatus err;
878 struct ifaddrs * addrs;
879 struct ifaddrs * p;
880 uint32_t flagMask;
881 uint32_t flagTest;
882 MDNSInterfaceItem ** next;
883 MDNSInterfaceItem * item;
884
885 addrs = NULL;
886
887 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up interface list\n" );
888 check( inMDNS );
889
890 // Tear down any existing interfaces that may be set up.
891
892 TearDownInterfaceList( inMDNS );
893 inMDNS->p->interfaceList = NULL;
894 next = &inMDNS->p->interfaceList;
895
896 // Set up each interface that is active, multicast-capable, and not the loopback interface or point-to-point.
897
898 flagMask = IFF_UP | IFF_MULTICAST | IFF_LOOPBACK | IFF_POINTOPOINT;
899 flagTest = IFF_UP | IFF_MULTICAST;
900
901 err = getifaddrs( &addrs );
902 require_noerr( err, exit );
903
904 for( p = addrs; p; p = p->ifa_next )
905 {
906 if( ( p->ifa_flags & flagMask ) == flagTest )
907 {
908 err = SetupInterface( inMDNS, p, &item );
909 require_noerr( err, exit );
910
911 *next = item;
912 next = &item->next;
913 }
914 }
915 err = mStatus_NoError;
916
917 exit:
918 if( addrs )
919 {
920 freeifaddrs( addrs );
921 }
922 if( err )
923 {
924 TearDownInterfaceList( inMDNS );
925 }
926 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up interface list done (err=%ld)\n", err );
927 return( err );
928 }
929
930 //===========================================================================================================================
931 // TearDownInterfaceList
932 //===========================================================================================================================
933
934 mDNSlocal mStatus TearDownInterfaceList( mDNS * const inMDNS )
935 {
936 dlog( kDebugLevelVerbose, DEBUG_NAME "tearing down interface list\n" );
937 check( inMDNS );
938
939 // Tear down all the interfaces.
940
941 while( inMDNS->p->interfaceList )
942 {
943 MDNSInterfaceItem * item;
944
945 item = inMDNS->p->interfaceList;
946 inMDNS->p->interfaceList = item->next;
947
948 TearDownInterface( inMDNS, item );
949 }
950
951 dlog( kDebugLevelVerbose, DEBUG_NAME "tearing down interface list done\n" );
952 return( mStatus_NoError );
953 }
954
955 //===========================================================================================================================
956 // SetupInterface
957 //===========================================================================================================================
958
959 mDNSlocal mStatus SetupInterface( mDNS * const inMDNS, const struct ifaddrs *inAddr, MDNSInterfaceItem **outItem )
960 {
961 mStatus err;
962 MDNSInterfaceItem * item;
963 MDNSSocketRef socketRef;
964 const struct sockaddr_in * ipv4, *mask;
965
966 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up interface (name=%s)\n", inAddr->ifa_name );
967 check( inMDNS );
968 check( inAddr );
969 check( inAddr->ifa_addr );
970 ipv4 = (const struct sockaddr_in *) inAddr->ifa_addr;
971 mask = (const struct sockaddr_in *) inAddr->ifa_netmask;
972 check( outItem );
973
974 // Allocate memory for the info item.
975
976 item = (MDNSInterfaceItem *) calloc( 1, sizeof( *item ) );
977 require_action( item, exit, err = mStatus_NoMemoryErr );
978 strcpy( item->name, inAddr->ifa_name );
979 item->multicastSocketRef = kInvalidSocketRef;
980 item->sendingSocketRef = kInvalidSocketRef;
981
982 // Set up the multicast DNS (port 5353) socket for this interface.
983
984 err = SetupSocket( inMDNS, inAddr, MulticastDNSPort, &socketRef );
985 require_noerr( err, exit );
986 item->multicastSocketRef = socketRef;
987
988 // Set up the sending socket for this interface.
989
990 err = SetupSocket( inMDNS, inAddr, zeroIPPort, &socketRef );
991 require_noerr( err, exit );
992 item->sendingSocketRef = socketRef;
993
994 // Register this interface with mDNS.
995
996 item->hostSet.InterfaceID = (mDNSInterfaceID) item;
997 item->hostSet.ip.type = mDNSAddrType_IPv4;
998 item->hostSet.ip.ip.v4.NotAnInteger = ipv4->sin_addr.s_addr;
999 item->hostSet.mask.type = mDNSAddrType_IPv4;
1000 item->hostSet.mask.ip.v4.NotAnInteger = mask->sin_addr.s_addr;
1001 item->hostSet.ifname[0] = 0;
1002 item->hostSet.Advertise = inMDNS->AdvertiseLocalAddresses;
1003 item->hostSet.McastTxRx = mDNStrue;
1004
1005 err = mDNS_RegisterInterface( inMDNS, &item->hostSet, NormalActivation );
1006 require_noerr( err, exit );
1007 item->hostRegistered = mDNStrue;
1008
1009 dlog( kDebugLevelInfo, DEBUG_NAME "Registered IP address: %u.%u.%u.%u\n",
1010 item->hostSet.ip.ip.v4.b[ 0 ], item->hostSet.ip.ip.v4.b[ 1 ],
1011 item->hostSet.ip.ip.v4.b[ 2 ], item->hostSet.ip.ip.v4.b[ 3 ] );
1012
1013 // Success!
1014
1015 *outItem = item;
1016 item = NULL;
1017
1018 exit:
1019 if( item )
1020 {
1021 TearDownInterface( inMDNS, item );
1022 }
1023 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up interface done (name=%s, err=%ld)\n", inAddr->ifa_name, err );
1024 return( err );
1025 }
1026
1027 //===========================================================================================================================
1028 // TearDownInterface
1029 //===========================================================================================================================
1030
1031 mDNSlocal mStatus TearDownInterface( mDNS * const inMDNS, MDNSInterfaceItem *inItem )
1032 {
1033 MDNSSocketRef socketRef;
1034
1035 check( inMDNS );
1036 check( inItem );
1037
1038 // Deregister this interface with mDNS.
1039
1040 dlog( kDebugLevelInfo, DEBUG_NAME "Deregistering IP address: %u.%u.%u.%u\n",
1041 inItem->hostSet.ip.ip.v4.b[ 0 ], inItem->hostSet.ip.ip.v4.b[ 1 ],
1042 inItem->hostSet.ip.ip.v4.b[ 2 ], inItem->hostSet.ip.ip.v4.b[ 3 ] );
1043
1044 if( inItem->hostRegistered )
1045 {
1046 inItem->hostRegistered = mDNSfalse;
1047 mDNS_DeregisterInterface( inMDNS, &inItem->hostSet, NormalActivation );
1048 }
1049
1050 // Close the multicast socket.
1051
1052 socketRef = inItem->multicastSocketRef;
1053 inItem->multicastSocketRef = kInvalidSocketRef;
1054 if( socketRef != kInvalidSocketRef )
1055 {
1056 dlog( kDebugLevelVerbose, DEBUG_NAME "tearing down multicast socket %d\n", socketRef );
1057 close( socketRef );
1058 }
1059
1060 // Close the sending socket.
1061
1062 socketRef = inItem->sendingSocketRef;
1063 inItem->sendingSocketRef = kInvalidSocketRef;
1064 if( socketRef != kInvalidSocketRef )
1065 {
1066 dlog( kDebugLevelVerbose, DEBUG_NAME "tearing down sending socket %d\n", socketRef );
1067 close( socketRef );
1068 }
1069
1070 // Free the memory used by the interface info.
1071
1072 free( inItem );
1073 return( mStatus_NoError );
1074 }
1075
1076 //===========================================================================================================================
1077 // SetupSocket
1078 //===========================================================================================================================
1079
1080 mDNSlocal mStatus
1081 SetupSocket(
1082 mDNS * const inMDNS,
1083 const struct ifaddrs * inAddr,
1084 mDNSIPPort inPort,
1085 MDNSSocketRef * outSocketRef )
1086 {
1087 mStatus err;
1088 MDNSSocketRef socketRef;
1089 int option;
1090 unsigned char optionByte;
1091 struct ip_mreq mreq;
1092 const struct sockaddr_in * ipv4;
1093 struct sockaddr_in addr;
1094 mDNSv4Addr ip;
1095
1096 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up socket done\n" );
1097 check( inMDNS );
1098 check( inAddr );
1099 check( inAddr->ifa_addr );
1100 ipv4 = (const struct sockaddr_in *) inAddr->ifa_addr;
1101 check( outSocketRef );
1102
1103 // Set up a UDP socket for multicast DNS.
1104
1105 socketRef = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );
1106 require_errno_action( socketRef, errno, exit, err = mStatus_UnknownErr );
1107
1108 // A port of zero means this socket is for sending and should be set up for sending. Otherwise, it is for receiving
1109 // and should be set up for receiving. The reason for separate sending vs receiving sockets is to workaround problems
1110 // with VxWorks IP stack when using dynamic IP configuration such as DHCP (problems binding to wildcard IP when the
1111 // IP address later changes). Since we have to bind the Multicast DNS address to workaround these issues we have to
1112 // use a separate sending socket since it is illegal to send a packet with a multicast source address (RFC 1122).
1113
1114 if( inPort.NotAnInteger != zeroIPPort.NotAnInteger )
1115 {
1116 // Turn on reuse port option so multiple servers can listen for Multicast DNS packets.
1117
1118 option = 1;
1119 err = setsockopt( socketRef, SOL_SOCKET, SO_REUSEADDR, (char *) &option, sizeof( option ) );
1120 check_errno( err, errno );
1121
1122 // Join the all-DNS multicast group so we receive Multicast DNS packets.
1123
1124 ip.NotAnInteger = ipv4->sin_addr.s_addr;
1125 mreq.imr_multiaddr.s_addr = AllDNSLinkGroup_v4.ip.v4.NotAnInteger;
1126 mreq.imr_interface.s_addr = ip.NotAnInteger;
1127 err = setsockopt( socketRef, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &mreq, sizeof( mreq ) );
1128 check_errno( err, errno );
1129
1130 // Bind to the multicast DNS address and port 5353.
1131
1132 mDNSPlatformMemZero( &addr, sizeof( addr ) );
1133 addr.sin_family = AF_INET;
1134 addr.sin_port = inPort.NotAnInteger;
1135 addr.sin_addr.s_addr = AllDNSLinkGroup_v4.ip.v4.NotAnInteger;
1136 err = bind( socketRef, (struct sockaddr *) &addr, sizeof( addr ) );
1137 check_errno( err, errno );
1138
1139 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up socket done (%s, %u.%u.%u.%u:%u, %d)\n",
1140 inAddr->ifa_name, ip.b[ 0 ], ip.b[ 1 ], ip.b[ 2 ], ip.b[ 3 ], ntohs( inPort.NotAnInteger ), socketRef );
1141 }
1142 else
1143 {
1144 // Bind to the interface address and multicast DNS port.
1145
1146 ip.NotAnInteger = ipv4->sin_addr.s_addr;
1147 mDNSPlatformMemZero( &addr, sizeof( addr ) );
1148 addr.sin_family = AF_INET;
1149 addr.sin_port = MulticastDNSPort.NotAnInteger;
1150 addr.sin_addr.s_addr = ip.NotAnInteger;
1151 err = bind( socketRef, (struct sockaddr *) &addr, sizeof( addr ) );
1152 check_errno( err, errno );
1153
1154 // Direct multicast packets to the specified interface.
1155
1156 addr.sin_addr.s_addr = ip.NotAnInteger;
1157 err = setsockopt( socketRef, IPPROTO_IP, IP_MULTICAST_IF, (char *) &addr.sin_addr, sizeof( addr.sin_addr ) );
1158 check_errno( err, errno );
1159
1160 // Set the TTL of outgoing unicast packets to 255 (helps against spoofing).
1161
1162 option = 255;
1163 err = setsockopt( socketRef, IPPROTO_IP, IP_TTL, (char *) &option, sizeof( option ) );
1164 check_errno( err, errno );
1165
1166 // Set the TTL of outgoing multicast packets to 255 (helps against spoofing).
1167
1168 optionByte = 255;
1169 err = setsockopt( socketRef, IPPROTO_IP, IP_MULTICAST_TTL, (char *) &optionByte, sizeof( optionByte ) );
1170 check_errno( err, errno );
1171
1172 // WARNING: Setting this option causes unicast responses to be routed to the wrong interface so they are
1173 // WARNING: disabled. These options were only hints to improve 802.11 performance (and not implemented) anyway.
1174
1175 #if 0
1176 // Mark packets as high-throughput/low-delay (i.e. lowest reliability) to maximize 802.11 multicast rate.
1177
1178 option = IPTOS_LOWDELAY | IPTOS_THROUGHPUT;
1179 err = setsockopt( socketRef, IPPROTO_IP, IP_TOS, (char *) &option, sizeof( option ) );
1180 check_errno( err, errno );
1181 #endif
1182
1183 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up sending socket done (%s, %u.%u.%u.%u, %d)\n",
1184 inAddr->ifa_name, ip.b[ 0 ], ip.b[ 1 ], ip.b[ 2 ], ip.b[ 3 ], socketRef );
1185 }
1186
1187 // Success!
1188
1189 *outSocketRef = socketRef;
1190 socketRef = kInvalidSocketRef;
1191 err = mStatus_NoError;
1192
1193 exit:
1194 if( socketRef != kInvalidSocketRef )
1195 {
1196 close( socketRef );
1197 }
1198 return( err );
1199 }
1200
1201 #if 0
1202 #pragma mark -
1203 #pragma mark == Commands ==
1204 #endif
1205
1206 //===========================================================================================================================
1207 // SetupCommandPipe
1208 //===========================================================================================================================
1209
1210 mDNSlocal mStatus SetupCommandPipe( mDNS * const inMDNS )
1211 {
1212 mStatus err;
1213
1214 // Clean up any leftover command pipe.
1215
1216 TearDownCommandPipe( inMDNS );
1217
1218 // Create the pipe device and open it.
1219
1220 pipeDevCreate( kMDNSPipeName, kMDNSPipeMessageQueueSize, kMDNSPipeMessageSize );
1221
1222 inMDNS->p->commandPipe = open( kMDNSPipeName, O_RDWR, 0 );
1223 require_errno_action( inMDNS->p->commandPipe, errno, exit, err = mStatus_UnsupportedErr );
1224
1225 err = mStatus_NoError;
1226
1227 exit:
1228 return( err );
1229 }
1230
1231 //===========================================================================================================================
1232 // TearDownCommandPipe
1233 //===========================================================================================================================
1234
1235 mDNSlocal mStatus TearDownCommandPipe( mDNS * const inMDNS )
1236 {
1237 if( inMDNS->p->commandPipe != ERROR )
1238 {
1239 close( inMDNS->p->commandPipe );
1240 #ifdef _WRS_VXWORKS_5_X
1241 // pipeDevDelete is not defined in older versions of VxWorks
1242 pipeDevDelete( kMDNSPipeName, FALSE );
1243 #endif
1244 inMDNS->p->commandPipe = ERROR;
1245 }
1246 return( mStatus_NoError );
1247 }
1248
1249 //===========================================================================================================================
1250 // SendCommand
1251 //===========================================================================================================================
1252
1253 mDNSlocal mStatus SendCommand( const mDNS * const inMDNS, MDNSPipeCommandCode inCommandCode )
1254 {
1255 mStatus err;
1256
1257 require_action( inMDNS->p->commandPipe != ERROR, exit, err = mStatus_NotInitializedErr );
1258
1259 err = write( inMDNS->p->commandPipe, &inCommandCode, sizeof( inCommandCode ) );
1260 require_errno( err, errno, exit );
1261
1262 err = mStatus_NoError;
1263
1264 exit:
1265 return( err );
1266 }
1267
1268 //===========================================================================================================================
1269 // ProcessCommand
1270 //===========================================================================================================================
1271
1272 mDNSlocal mStatus ProcessCommand( mDNS * const inMDNS )
1273 {
1274 mStatus err;
1275 MDNSPipeCommandCode commandCode;
1276
1277 require_action( inMDNS->p->commandPipe != ERROR, exit, err = mStatus_NotInitializedErr );
1278
1279 // Read the command code from the pipe and dispatch it.
1280
1281 err = read( inMDNS->p->commandPipe, &commandCode, sizeof( commandCode ) );
1282 require_errno( err, errno, exit );
1283
1284 switch( commandCode )
1285 {
1286 case kMDNSPipeCommandCodeReschedule:
1287
1288 // Reschedule event. Do nothing here, but this will cause mDNS_Execute to run before waiting again.
1289
1290 dlog( kDebugLevelChatty, DEBUG_NAME "reschedule\n" );
1291 break;
1292
1293 case kMDNSPipeCommandCodeReconfigure:
1294 ProcessCommandReconfigure( inMDNS );
1295 break;
1296
1297 case kMDNSPipeCommandCodeQuit:
1298
1299 // Quit requested. Set quit flag and bump the config ID to let the thread exit normally.
1300
1301 dlog( kDebugLevelVerbose, DEBUG_NAME "processing pipe quit command\n" );
1302 inMDNS->p->quit = mDNStrue;
1303 ++inMDNS->p->configID;
1304 break;
1305
1306 default:
1307 dlog( kDebugLevelError, DEBUG_NAME "unknown pipe command code (code=0x%08X)\n", commandCode );
1308 err = mStatus_BadParamErr;
1309 goto exit;
1310 break;
1311 }
1312 err = mStatus_NoError;
1313
1314 exit:
1315 return( err );
1316 }
1317
1318 //===========================================================================================================================
1319 // ProcessCommandReconfigure
1320 //===========================================================================================================================
1321
1322 mDNSlocal void ProcessCommandReconfigure( mDNS *inMDNS )
1323 {
1324 mStatus err;
1325
1326 dlog( kDebugLevelVerbose, DEBUG_NAME "processing pipe reconfigure command\n" );
1327
1328 // Tear down the existing interfaces and set up new ones using the new IP info.
1329
1330 mDNSPlatformLock( inMDNS );
1331
1332 err = TearDownInterfaceList( inMDNS );
1333 check_noerr( err );
1334
1335 err = SetupInterfaceList( inMDNS );
1336 check_noerr( err );
1337
1338 mDNSPlatformUnlock( inMDNS );
1339
1340 // Inform clients of the change.
1341
1342 mDNS_ConfigChanged(m);
1343
1344 // Force mDNS to update.
1345
1346 mDNSCoreMachineSleep( inMDNS, mDNSfalse ); // What is this for? Mac OS X does not do this
1347
1348 // Bump the config ID so the main processing loop detects the configuration change.
1349
1350 ++inMDNS->p->configID;
1351 }
1352
1353 #if 0
1354 #pragma mark -
1355 #pragma mark == Threads ==
1356 #endif
1357
1358 //===========================================================================================================================
1359 // SetupTask
1360 //===========================================================================================================================
1361
1362 mDNSlocal mStatus SetupTask( mDNS * const inMDNS )
1363 {
1364 mStatus err;
1365 int task;
1366
1367 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up thread\n" );
1368 check( inMDNS );
1369
1370 // Create our main thread. Note: The task will save off its ID in the globals. We cannot do it here because the
1371 // task invokes code that needs it and the task may begin execution before taskSpawn returns the task ID.
1372 // This also means code in this thread context cannot rely on the task ID until the task has fully initialized.
1373
1374 task = taskSpawn( kMDNSTaskName, kMDNSTaskPriority, 0, kMDNSTaskStackSize, (FUNCPTR) Task,
1375 (int) inMDNS, 0, 0, 0, 0, 0, 0, 0, 0, 0 );
1376 require_action( task != ERROR, exit, err = mStatus_NoMemoryErr );
1377
1378 err = mStatus_NoError;
1379
1380 exit:
1381 dlog( kDebugLevelVerbose, DEBUG_NAME "setting up thread done (err=%ld, id=%d)\n", err, task );
1382 return( err );
1383 }
1384
1385 //===========================================================================================================================
1386 // TearDownTask
1387 //===========================================================================================================================
1388
1389 mDNSlocal mStatus TearDownTask( mDNS * const inMDNS )
1390 {
1391 mStatus err;
1392
1393 dlog( kDebugLevelVerbose, DEBUG_NAME "tearing down thread\n" );
1394 check( inMDNS );
1395
1396 // Send a quit command to cause the thread to exit.
1397
1398 SendCommand( inMDNS, kMDNSPipeCommandCodeQuit );
1399
1400 // Wait for the thread to signal it has exited. Timeout in 10 seconds to handle a hung thread.
1401
1402 if( inMDNS->p->quitEvent )
1403 {
1404 err = semTake( inMDNS->p->quitEvent, sysClkRateGet() * 10 );
1405 check_noerr( err );
1406 }
1407 err = mStatus_NoError;
1408
1409 dlog( kDebugLevelVerbose, DEBUG_NAME "tearing down thread done (err=%ld)\n", err );
1410 return( err );
1411 }
1412
1413 //===========================================================================================================================
1414 // Task
1415 //===========================================================================================================================
1416
1417 mDNSlocal void Task( mDNS *inMDNS )
1418 {
1419 mStatus err;
1420 fd_set allReadSet;
1421 MDNSInterfaceItem * item;
1422 int maxSocket;
1423 long configID;
1424 struct timeval timeout;
1425
1426 dlog( kDebugLevelVerbose, DEBUG_NAME "task starting\n" );
1427 check( inMDNS );
1428
1429 // Set up everything up.
1430
1431 err = TaskInit( inMDNS );
1432 require_noerr( err, exit );
1433
1434 // Main Processing Loop.
1435
1436 while( !inMDNS->p->quit )
1437 {
1438 // Set up the read set here to avoid the overhead of setting it up each iteration of the main processing loop.
1439 // If the configuration changes, the server ID will be bumped, causing this code to set up the read set again.
1440
1441 TaskSetupReadSet( inMDNS, &allReadSet, &maxSocket );
1442 configID = inMDNS->p->configID;
1443 dlog( kDebugLevelVerbose, DEBUG_NAME "task starting processing loop (configID=%ld)\n", configID );
1444
1445 while( configID == inMDNS->p->configID )
1446 {
1447 mDNSs32 nextTaskTime;
1448 fd_set readSet;
1449 int n;
1450
1451 // Give the mDNS core a chance to do its work. Reset the rescheduled flag before calling mDNS_Execute
1452 // so anything that needs processing during or after causes a re-schedule to wake up the thread. The
1453 // reschedule flag is set to 1 after processing a waking up to prevent redundant reschedules while
1454 // processing packets. This introduces a window for a race condition because the thread wake-up and
1455 // reschedule set are not atomic, but this would be benign. Even if the reschedule flag is "corrupted"
1456 // like this, it would only result in a redundant reschedule since it will loop back to mDNS_Execute.
1457
1458 inMDNS->p->rescheduled = 0;
1459 nextTaskTime = mDNS_Execute( inMDNS );
1460 TaskSetupTimeout( inMDNS, nextTaskTime, &timeout );
1461
1462 // Wait until something occurs (e.g. command, incoming packet, or timeout).
1463
1464 readSet = allReadSet;
1465 n = select( maxSocket + 1, &readSet, NULL, NULL, &timeout );
1466 inMDNS->p->rescheduled = 1;
1467 check_errno( n, errno );
1468 dlog( kDebugLevelChatty - 1, DEBUG_NAME "task select result = %d\n", n );
1469 if( n == 0 )
1470 {
1471 // Next task timeout occurred. Loop back up to give mDNS core a chance to work.
1472
1473 dlog( kDebugLevelChatty, DEBUG_NAME "next task timeout occurred (%ld)\n", mDNS_TimeNow(inMDNS) );
1474 continue;
1475 }
1476
1477 // Scan the read set to determine if any sockets have something pending and process them.
1478
1479 n = 0;
1480 for( item = inMDNS->p->interfaceList; item; item = item->next )
1481 {
1482 if( FD_ISSET( item->multicastSocketRef, &readSet ) )
1483 {
1484 TaskProcessPacket( inMDNS, item, item->multicastSocketRef );
1485 ++n;
1486 }
1487 }
1488
1489 // Check for a pending command and process it.
1490
1491 if( FD_ISSET( inMDNS->p->commandPipe, &readSet ) )
1492 {
1493 ProcessCommand( inMDNS );
1494 ++n;
1495 }
1496 check( n > 0 );
1497 }
1498 }
1499
1500 exit:
1501 // Signal we've quit.
1502
1503 check( inMDNS->p->quitEvent );
1504 semGive( inMDNS->p->quitEvent );
1505
1506 dlog( kDebugLevelInfo, DEBUG_NAME "task ended\n" );
1507 }
1508
1509 //===========================================================================================================================
1510 // TaskInit
1511 //===========================================================================================================================
1512
1513 mDNSlocal mStatus TaskInit( mDNS *inMDNS )
1514 {
1515 mStatus err;
1516
1517 dlog( kDebugLevelVerbose, DEBUG_NAME "task init\n" );
1518 check( inMDNS->p->readyEvent );
1519
1520 inMDNS->p->task = taskIdSelf();
1521
1522 err = SetupCommandPipe( inMDNS );
1523 require_noerr( err, exit );
1524
1525 SetupNames( inMDNS );
1526
1527 err = SetupInterfaceList( inMDNS );
1528 require_noerr( err, exit );
1529
1530 exit:
1531 // Signal the "ready" semaphore to indicate the task initialization code has completed (success or not).
1532
1533 inMDNS->p->taskInitErr = err;
1534 semGive( inMDNS->p->readyEvent );
1535
1536 dlog( kDebugLevelVerbose, DEBUG_NAME "task init done (err=%ld)\n", err );
1537 return( err );
1538 }
1539
1540 //===========================================================================================================================
1541 // TaskSetupReadSet
1542 //===========================================================================================================================
1543
1544 mDNSlocal void TaskSetupReadSet( mDNS *inMDNS, fd_set *outReadSet, int *outMaxSocket )
1545 {
1546 MDNSInterfaceItem * item;
1547 int maxSocket;
1548
1549 dlog( kDebugLevelVerbose, DEBUG_NAME "task setting up read set\n" );
1550 check( inMDNS );
1551 check( outReadSet );
1552 check( outMaxSocket );
1553
1554 // Initialize the read set. Default the max socket to -1 so "maxSocket + 1" (as needed by select) is zero. This
1555 // should never happen since we should always have at least one interface, but it's just to be safe.
1556
1557 FD_ZERO( outReadSet );
1558 maxSocket = -1;
1559
1560 // Add all the receiving sockets to the read set.
1561
1562 for( item = inMDNS->p->interfaceList; item; item = item->next )
1563 {
1564 FD_SET( item->multicastSocketRef, outReadSet );
1565 if( item->multicastSocketRef > maxSocket )
1566 {
1567 maxSocket = item->multicastSocketRef;
1568 }
1569 }
1570
1571 // Add the command pipe to the read set.
1572
1573 FD_SET( inMDNS->p->commandPipe, outReadSet );
1574 if( inMDNS->p->commandPipe > maxSocket )
1575 {
1576 maxSocket = inMDNS->p->commandPipe;
1577 }
1578 check( maxSocket > 0 );
1579 *outMaxSocket = maxSocket;
1580
1581 dlog( kDebugLevelVerbose, DEBUG_NAME "task setting up read set done (maxSocket=%d)\n", maxSocket );
1582 }
1583
1584 //===========================================================================================================================
1585 // TaskSetupTimeout
1586 //===========================================================================================================================
1587
1588 mDNSlocal void TaskSetupTimeout( mDNS *inMDNS, mDNSs32 inNextTaskTime, struct timeval *outTimeout )
1589 {
1590 mDNSs32 delta;
1591
1592 // Calculate how long to wait before performing idle processing.
1593
1594 delta = inNextTaskTime - mDNS_TimeNow(inMDNS);
1595 if( delta <= 0 )
1596 {
1597 // The next task time is now or in the past. Set the timeout to fire immediately.
1598
1599 outTimeout->tv_sec = 0;
1600 outTimeout->tv_usec = 0;
1601 }
1602 else
1603 {
1604 // Calculate the seconds and microseconds until the timeout should occur. Add one to the ticks remainder
1605 // before multiplying to account for integer rounding error and avoid firing the timeout too early.
1606
1607 outTimeout->tv_sec = delta / mDNSPlatformOneSecond;
1608 outTimeout->tv_usec = ( ( delta % mDNSPlatformOneSecond ) + 1 ) * gMDNSTicksToMicrosecondsMultiplier;
1609
1610 // Check if the microseconds is more than 1 second. If so, bump the seconds instead.
1611
1612 if( outTimeout->tv_usec >= 1000000L )
1613 {
1614 outTimeout->tv_sec += 1;
1615 outTimeout->tv_usec = 0;
1616 }
1617 }
1618
1619 dlog( kDebugLevelChatty, DEBUG_NAME "next task in %ld:%ld seconds (%ld)\n",
1620 outTimeout->tv_sec, outTimeout->tv_usec, inNextTaskTime );
1621 }
1622 //===========================================================================================================================
1623 // TaskProcessPacket
1624 //===========================================================================================================================
1625
1626 mDNSlocal void TaskProcessPacket( mDNS *inMDNS, MDNSInterfaceItem *inItem, MDNSSocketRef inSocketRef )
1627 {
1628 int n;
1629 DNSMessage packet;
1630 struct sockaddr_in addr;
1631 int addrSize;
1632 mDNSu8 * packetEndPtr;
1633 mDNSAddr srcAddr;
1634 mDNSIPPort srcPort;
1635 mDNSAddr dstAddr;
1636 mDNSIPPort dstPort;
1637
1638 // Receive the packet.
1639
1640 addrSize = sizeof( addr );
1641 n = recvfrom( inSocketRef, (char *) &packet, sizeof( packet ), 0, (struct sockaddr *) &addr, &addrSize );
1642 check( n >= 0 );
1643 if( n >= 0 )
1644 {
1645 // Set up the src/dst/interface info.
1646
1647 srcAddr.type = mDNSAddrType_IPv4;
1648 srcAddr.ip.v4.NotAnInteger = addr.sin_addr.s_addr;
1649 srcPort.NotAnInteger = addr.sin_port;
1650 dstAddr.type = mDNSAddrType_IPv4;
1651 dstAddr.ip.v4 = AllDNSLinkGroup_v4.ip.v4;
1652 dstPort = MulticastDNSPort;
1653
1654 dlog( kDebugLevelChatty, DEBUG_NAME "packet received\n" );
1655 dlog( kDebugLevelChatty, DEBUG_NAME " size = %d\n", n );
1656 dlog( kDebugLevelChatty, DEBUG_NAME " src = %u.%u.%u.%u:%hu\n",
1657 srcAddr.ip.v4.b[ 0 ], srcAddr.ip.v4.b[ 1 ], srcAddr.ip.v4.b[ 2 ], srcAddr.ip.v4.b[ 3 ],
1658 ntohs( srcPort.NotAnInteger ) );
1659 dlog( kDebugLevelChatty, DEBUG_NAME " dst = %u.%u.%u.%u:%hu\n",
1660 dstAddr.ip.v4.b[ 0 ], dstAddr.ip.v4.b[ 1 ], dstAddr.ip.v4.b[ 2 ], dstAddr.ip.v4.b[ 3 ],
1661 ntohs( dstPort.NotAnInteger ) );
1662 dlog( kDebugLevelChatty, DEBUG_NAME " interface = 0x%08X\n", (int) inItem->hostSet.InterfaceID );
1663 dlog( kDebugLevelChatty, DEBUG_NAME "--\n" );
1664
1665 // Dispatch the packet to mDNS.
1666
1667 packetEndPtr = ( (mDNSu8 *) &packet ) + n;
1668 mDNSCoreReceive( inMDNS, &packet, packetEndPtr, &srcAddr, srcPort, &dstAddr, dstPort, inItem->hostSet.InterfaceID );
1669 }
1670
1671 // Update counters.
1672
1673 inItem->recvCounter += 1;
1674 inItem->recvErrorCounter += ( n < 0 );
1675 }
1676
1677 #if 0
1678 #pragma mark -
1679 #pragma mark == Utilities ==
1680 #endif
1681
1682 #if ( TARGET_NON_APPLE )
1683 //===========================================================================================================================
1684 // GenerateUniqueHostName
1685 //
1686 // Non-Apple platform stub routine to generate a unique name for the device. Should be implemented to return a unique name.
1687 //===========================================================================================================================
1688
1689 mDNSlocal void GenerateUniqueHostName( char *outName, long *ioSeed )
1690 {
1691 DEBUG_UNUSED( ioSeed );
1692
1693 // $$$ Non-Apple Platforms: Fill in appropriate name for device.
1694
1695 mDNSPlatformStrCopy( outName, kMDNSDefaultName );
1696 }
1697
1698 //===========================================================================================================================
1699 // GenerateUniqueDNSName
1700 //
1701 // Non-Apple platform stub routine to generate a unique RFC 1034-compatible DNS name for the device. Should be
1702 // implemented to return a unique name.
1703 //===========================================================================================================================
1704
1705 mDNSlocal void GenerateUniqueDNSName( char *outName, long *ioSeed )
1706 {
1707 DEBUG_UNUSED( ioSeed );
1708
1709 // $$$ Non-Apple Platforms: Fill in appropriate DNS name for device.
1710
1711 mDNSPlatformStrCopy( outName, kMDNSDefaultName );
1712 }
1713 #endif
1714
1715 #if 0
1716 #pragma mark -
1717 #endif
1718
1719 //===========================================================================================================================
1720 // getifaddrs
1721 //===========================================================================================================================
1722
1723 int getifaddrs( struct ifaddrs **outAddrs )
1724 {
1725 int err;
1726 struct ifaddrs * head;
1727 struct ifaddrs ** next;
1728 struct ifaddrs * ifa;
1729 int i;
1730 struct ifnet * ifp;
1731 char ipString[ INET_ADDR_LEN ];
1732 int n;
1733
1734 head = NULL;
1735 next = &head;
1736
1737 i = 1;
1738 for( ;; )
1739 {
1740 ifp = ifIndexToIfp( i );
1741 if( !ifp )
1742 {
1743 break;
1744 }
1745 ++i;
1746
1747 // Allocate and initialize the ifaddrs structure and attach it to the linked list.
1748
1749 ifa = (struct ifaddrs *) calloc( 1, sizeof( struct ifaddrs ) );
1750 require_action( ifa, exit, err = ENOMEM );
1751
1752 *next = ifa;
1753 next = &ifa->ifa_next;
1754
1755 // Fetch the name.
1756
1757 ifa->ifa_name = (char *) malloc( 16 );
1758 require_action( ifa->ifa_name, exit, err = ENOMEM );
1759
1760 n = sprintf( ifa->ifa_name, "%s%d", ifp->if_name, ifp->if_unit );
1761 require_action( n < 16, exit, err = ENOBUFS );
1762
1763 // Fetch the address.
1764
1765 ifa->ifa_addr = (struct sockaddr *) calloc( 1, sizeof( struct sockaddr_in ) );
1766 require_action( ifa->ifa_addr, exit, err = ENOMEM );
1767
1768 ipString[ 0 ] = '\0';
1769 #if ( TARGET_NON_APPLE )
1770 err = ifAddrGet( ifa->ifa_name, ipString );
1771 require_noerr( err, exit );
1772 #else
1773 err = ifAddrGetNonAlias( ifa->ifa_name, ipString );
1774 require_noerr( err, exit );
1775 #endif
1776
1777 err = sock_pton( ipString, AF_INET, ifa->ifa_addr, 0, NULL );
1778 require_noerr( err, exit );
1779
1780 // Fetch flags.
1781
1782 ifa->ifa_flags = ifp->if_flags;
1783 }
1784
1785 // Success!
1786
1787 if( outAddrs )
1788 {
1789 *outAddrs = head;
1790 head = NULL;
1791 }
1792 err = 0;
1793
1794 exit:
1795 if( head )
1796 {
1797 freeifaddrs( head );
1798 }
1799 return( err );
1800 }
1801
1802 //===========================================================================================================================
1803 // freeifaddrs
1804 //===========================================================================================================================
1805
1806 void freeifaddrs( struct ifaddrs *inAddrs )
1807 {
1808 struct ifaddrs * p;
1809 struct ifaddrs * q;
1810
1811 // Free each piece of the structure. Set to null after freeing to handle macro-aliased fields.
1812
1813 for( p = inAddrs; p; p = q )
1814 {
1815 q = p->ifa_next;
1816
1817 if( p->ifa_name )
1818 {
1819 free( p->ifa_name );
1820 p->ifa_name = NULL;
1821 }
1822 if( p->ifa_addr )
1823 {
1824 free( p->ifa_addr );
1825 p->ifa_addr = NULL;
1826 }
1827 if( p->ifa_netmask )
1828 {
1829 free( p->ifa_netmask );
1830 p->ifa_netmask = NULL;
1831 }
1832 if( p->ifa_dstaddr )
1833 {
1834 free( p->ifa_dstaddr );
1835 p->ifa_dstaddr = NULL;
1836 }
1837 if( p->ifa_data )
1838 {
1839 free( p->ifa_data );
1840 p->ifa_data = NULL;
1841 }
1842 free( p );
1843 }
1844 }
1845
1846 //===========================================================================================================================
1847 // sock_pton
1848 //===========================================================================================================================
1849
1850 int sock_pton( const char *inString, int inFamily, void *outAddr, size_t inAddrSize, size_t *outAddrSize )
1851 {
1852 int err;
1853
1854 if( inFamily == AF_INET )
1855 {
1856 struct sockaddr_in * ipv4;
1857
1858 if( inAddrSize == 0 )
1859 {
1860 inAddrSize = sizeof( struct sockaddr_in );
1861 }
1862 if( inAddrSize < sizeof( struct sockaddr_in ) )
1863 {
1864 err = EINVAL;
1865 goto exit;
1866 }
1867
1868 ipv4 = (struct sockaddr_in *) outAddr;
1869 err = inet_aton( (char *) inString, &ipv4->sin_addr );
1870 if( err == 0 )
1871 {
1872 ipv4->sin_family = AF_INET;
1873 if( outAddrSize )
1874 {
1875 *outAddrSize = sizeof( struct sockaddr_in );
1876 }
1877 }
1878 }
1879 #if ( defined( AF_INET6 ) )
1880 else if( inFamily == AF_INET6 ) // $$$ TO DO: Add IPv6 support.
1881 {
1882 err = EAFNOSUPPORT;
1883 goto exit;
1884 }
1885 #endif
1886 else
1887 {
1888 err = EAFNOSUPPORT;
1889 goto exit;
1890 }
1891
1892 exit:
1893 return( err );
1894 }
1895
1896 //===========================================================================================================================
1897 // sock_ntop
1898 //===========================================================================================================================
1899
1900 char * sock_ntop( const void *inAddr, size_t inAddrSize, char *inBuffer, size_t inBufferSize )
1901 {
1902 const struct sockaddr * addr;
1903
1904 addr = (const struct sockaddr *) inAddr;
1905 if( addr->sa_family == AF_INET )
1906 {
1907 struct sockaddr_in * ipv4;
1908
1909 if( inAddrSize == 0 )
1910 {
1911 inAddrSize = sizeof( struct sockaddr_in );
1912 }
1913 if( inAddrSize < sizeof( struct sockaddr_in ) )
1914 {
1915 errno = EINVAL;
1916 inBuffer = NULL;
1917 goto exit;
1918 }
1919 if( inBufferSize < 16 )
1920 {
1921 errno = ENOBUFS;
1922 inBuffer = NULL;
1923 goto exit;
1924 }
1925
1926 ipv4 = (struct sockaddr_in *) addr;
1927 inet_ntoa_b( ipv4->sin_addr, inBuffer );
1928 }
1929 #if ( defined( AF_INET6 ) )
1930 else if( addr->sa_family == AF_INET6 ) // $$$ TO DO: Add IPv6 support.
1931 {
1932 errno = EAFNOSUPPORT;
1933 inBuffer = NULL;
1934 goto exit;
1935 }
1936 #endif
1937 else
1938 {
1939 errno = EAFNOSUPPORT;
1940 inBuffer = NULL;
1941 goto exit;
1942 }
1943
1944 exit:
1945 return( inBuffer );
1946 }
1947
1948 #if 0
1949 #pragma mark -
1950 #pragma mark == Debugging ==
1951 #endif
1952
1953 #if ( DEBUG )
1954
1955 void mDNSShow( BOOL inShowRecords );
1956 void mDNSShowRecords( void );
1957 void mDNSShowTXT( const void *inTXT, size_t inTXTSize );
1958
1959 //===========================================================================================================================
1960 // mDNSShow
1961 //===========================================================================================================================
1962
1963 void mDNSShow( BOOL inShowRecords )
1964 {
1965 MDNSInterfaceItem * item;
1966 mDNSAddr ip;
1967 int n;
1968
1969 if( !gMDNSPtr )
1970 {
1971 printf( "### mDNS not initialized\n" );
1972 return;
1973 }
1974
1975 // Globals
1976
1977 printf( "\n-- mDNS globals --\n" );
1978 printf( " sizeof( mDNS ) = %d\n", (int) sizeof( mDNS ) );
1979 printf( " sizeof( ResourceRecord ) = %d\n", (int) sizeof( ResourceRecord ) );
1980 printf( " sizeof( AuthRecord ) = %d\n", (int) sizeof( AuthRecord ) );
1981 printf( " sizeof( CacheRecord ) = %d\n", (int) sizeof( CacheRecord ) );
1982 printf( " gMDNSPtr = 0x%08lX\n", (unsigned long) gMDNSPtr );
1983 printf( " gMDNSTicksToMicrosecondsMultiplier = %ld\n", gMDNSTicksToMicrosecondsMultiplier );
1984 printf( " lockID = 0x%08lX\n", (unsigned long) gMDNSPtr->p->lockID );
1985 printf( " readyEvent = 0x%08lX\n", (unsigned long) gMDNSPtr->p->readyEvent );
1986 printf( " taskInitErr = %ld\n", gMDNSPtr->p->taskInitErr );
1987 printf( " quitEvent = 0x%08lX\n", (unsigned long) gMDNSPtr->p->quitEvent );
1988 printf( " commandPipe = %d\n", gMDNSPtr->p->commandPipe );
1989 printf( " task = 0x%08lX\n", (unsigned long) gMDNSPtr->p->task );
1990 printf( " quit = %d\n", gMDNSPtr->p->quit );
1991 printf( " configID = %ld\n", gMDNSPtr->p->configID );
1992 printf( " rescheduled = %d\n", gMDNSPtr->p->rescheduled );
1993 printf( " nicelabel = \"%.*s\"\n", gMDNSPtr->nicelabel.c[ 0 ], (char *) &gMDNSPtr->nicelabel.c[ 1 ] );
1994 printf( " hostLabel = \"%.*s\"\n", gMDNSPtr->hostlabel.c[ 0 ], (char *) &gMDNSPtr->hostlabel.c[ 1 ] );
1995 printf( "\n");
1996
1997 // Interfaces
1998
1999 printf( "\n-- mDNS interfaces --\n" );
2000 n = 1;
2001 for( item = gMDNSPtr->p->interfaceList; item; item = item->next )
2002 {
2003 printf( " -- interface %u --\n", n );
2004 printf( " name = \"%s\"\n", item->name );
2005 printf( " multicastSocketRef = %d\n", item->multicastSocketRef );
2006 printf( " sendingSocketRef = %d\n", item->sendingSocketRef );
2007 ip = item->hostSet.ip;
2008 printf( " hostSet.ip = %u.%u.%u.%u\n", ip.ip.v4.b[ 0 ], ip.ip.v4.b[ 1 ],
2009 ip.ip.v4.b[ 2 ], ip.ip.v4.b[ 3 ] );
2010 printf( " hostSet.advertise = %s\n", item->hostSet.Advertise ? "YES" : "NO" );
2011 printf( " hostRegistered = %s\n", item->hostRegistered ? "YES" : "NO" );
2012 printf( " --\n" );
2013 printf( " sendMulticastCounter = %d\n", item->sendMulticastCounter );
2014 printf( " sendUnicastCounter = %d\n", item->sendUnicastCounter );
2015 printf( " sendErrorCounter = %d\n", item->sendErrorCounter );
2016 printf( " recvCounter = %d\n", item->recvCounter );
2017 printf( " recvErrorCounter = %d\n", item->recvErrorCounter );
2018 printf( " recvLoopCounter = %d\n", item->recvLoopCounter );
2019 printf( "\n" );
2020 ++n;
2021 }
2022
2023 // Resource Records
2024
2025 if( inShowRecords )
2026 {
2027 mDNSShowRecords();
2028 }
2029 }
2030
2031 //===========================================================================================================================
2032 // mDNSShowRecords
2033 //===========================================================================================================================
2034
2035 void mDNSShowRecords( void )
2036 {
2037 MDNSInterfaceItem * item;
2038 int n;
2039 AuthRecord * record;
2040 char name[ MAX_ESCAPED_DOMAIN_NAME ];
2041
2042 printf( "\n-- mDNS resource records --\n" );
2043 n = 1;
2044 for( record = gMDNSPtr->ResourceRecords; record; record = record->next )
2045 {
2046 item = (MDNSInterfaceItem *) record->resrec.InterfaceID;
2047 ConvertDomainNameToCString( &record->resrec.name, name );
2048 printf( " -- record %d --\n", n );
2049 printf( " interface = 0x%08X (%s)\n", (int) item, item ? item->name : "<any>" );
2050 printf( " name = \"%s\"\n", name );
2051 printf( "\n" );
2052 ++n;
2053 }
2054 printf( "\n");
2055 }
2056
2057 //===========================================================================================================================
2058 // mDNSShowTXT
2059 //===========================================================================================================================
2060
2061 void mDNSShowTXT( const void *inTXT, size_t inTXTSize )
2062 {
2063 const mDNSu8 * p;
2064 const mDNSu8 * end;
2065 int i;
2066 mDNSu8 size;
2067
2068 printf( "\nTXT record (%u bytes):\n\n", inTXTSize );
2069
2070 p = (const mDNSu8 *) inTXT;
2071 end = p + inTXTSize;
2072 i = 0;
2073
2074 while( p < end )
2075 {
2076 size = *p++;
2077 if( ( p + size ) > end )
2078 {
2079 printf( "\n### MALFORMED TXT RECORD (length byte too big for record)\n\n" );
2080 break;
2081 }
2082 printf( "%2d (%3d bytes): \"%.*s\"\n", i, size, size, p );
2083 p += size;
2084 ++i;
2085 }
2086 printf( "\n" );
2087 }
2088 #endif // DEBUG
mirror of mDNSResponder