-/*
+/* -*- Mode: C; tab-width: 4 -*-
+ *
* Copyright (c) 2002-2003 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * http://www.apache.org/licenses/LICENSE-2.0
*
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
* limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
-
- Change History (most recent first):
-
-$Log: uDNS.h,v $
-Revision 1.32 2005/07/29 19:46:10 ksekar
-<rdar://problem/4191860> reduce polling period on failed LLQs to 15 minutes
-
-Revision 1.31 2005/03/31 02:19:56 cheshire
-<rdar://problem/4021486> Fix build warnings
-Reviewed by: Scott Herscher
-
-Revision 1.30 2005/03/04 03:00:03 ksekar
-<rdar://problem/4026546> Retransmissions happen too early, causing registrations to conflict with themselves
-
-Revision 1.29 2005/01/11 22:50:53 ksekar
-Fixed constant naming (was using kLLQ_DefLease for update leases)
-
-Revision 1.28 2004/12/22 00:13:49 ksekar
-<rdar://problem/3873993> Change version, port, and polling interval for LLQ
-
-Revision 1.27 2004/11/23 04:06:50 cheshire
-Get rid of floating point constant -- in a small embedded device, bringing in all
-the floating point libraries just to halve an integer value is a bit too heavyweight.
-
-Revision 1.26 2004/11/22 17:49:15 ksekar
-Changed INIT_REFRESH from fraction to decimal
-
-Revision 1.25 2004/11/22 17:16:20 ksekar
-<rdar://problem/3854298> Unicast services don't disappear when you disable all networking
-
-Revision 1.24 2004/11/19 04:24:08 ksekar
-<rdar://problem/3682609> Security: Enforce a "window" on one-shot wide-area queries
-
-Revision 1.23 2004/11/18 18:04:21 ksekar
-Add INIT_REFRESH constant
-
-Revision 1.22 2004/11/15 20:09:24 ksekar
-<rdar://problem/3719050> Wide Area support for Add/Remove record
-
-Revision 1.21 2004/11/11 20:14:55 ksekar
-<rdar://problem/3719574> Wide-Area registrations not deregistered on sleep
-
-Revision 1.20 2004/10/16 00:16:59 cheshire
-<rdar://problem/3770558> Replace IP TTL 255 check with local subnet source address check
-
-Revision 1.19 2004/09/17 01:08:49 cheshire
-Renamed mDNSClientAPI.h to mDNSEmbeddedAPI.h
- The name "mDNSClientAPI.h" is misleading to new developers looking at this code. The interfaces
- declared in that file are ONLY appropriate to single-address-space embedded applications.
- For clients on general-purpose computers, the interfaces defined in dns_sd.h should be used.
-
-Revision 1.18 2004/09/03 19:23:05 ksekar
-<rdar://problem/3788460>: Need retransmission mechanism for wide-area service registrations
-
-Revision 1.17 2004/09/01 03:59:29 ksekar
-<rdar://problem/3783453>: Conditionally compile out uDNS code on Windows
-
-Revision 1.16 2004/08/25 00:37:27 ksekar
-<rdar://problem/3774635>: Cleanup DynDNS hostname registration code
-
-Revision 1.15 2004/07/30 17:40:06 ksekar
-<rdar://problem/3739115>: TXT Record updates not available for wide-area services
-
-Revision 1.14 2004/07/29 19:27:15 ksekar
-NAT-PMP Support - minor fixes and cleanup
-
-Revision 1.13 2004/07/29 02:03:35 ksekar
-Delete unused #define and structure field
-
-Revision 1.12 2004/07/26 22:49:30 ksekar
-<rdar://problem/3651409>: Feature #9516: Need support for NAT-PMP in client
-
-Revision 1.11 2004/06/17 01:13:11 ksekar
-<rdar://problem/3696616>: polling interval too short
-
-Revision 1.10 2004/06/11 05:45:03 ksekar
-<rdar://problem/3682397>: Change SRV names for LLQ/Update port lookups
-
-Revision 1.9 2004/06/01 23:46:50 ksekar
-<rdar://problem/3675149>: DynDNS: dynamically look up LLQ/Update ports
-
-Revision 1.8 2004/05/28 23:42:37 ksekar
-<rdar://problem/3258021>: Feature: DNS server->client notification on record changes (#7805)
-
-Revision 1.7 2004/05/18 23:51:25 cheshire
-Tidy up all checkin comments to use consistent "<rdar://problem/xxxxxxx>" format for bug numbers
-
-Revision 1.6 2004/03/13 01:57:33 ksekar
-<rdar://problem/3192546>: DynDNS: Dynamic update of service records
-
-Revision 1.5 2004/02/21 08:56:58 bradley
-Wrap prototypes with extern "C" for C++ builds.
-
-Revision 1.4 2004/02/06 23:04:19 ksekar
-Basic Dynamic Update support via mDNS_Register (dissabled via
-UNICAST_REGISTRATION #define)
-
-Revision 1.3 2004/01/24 03:38:27 cheshire
-Fix minor syntactic error: Headers should use "extern" declarations, not "mDNSexport"
-
-Revision 1.2 2004/01/23 23:23:15 ksekar
-Added TCP support for truncated unicast messages.
-
-Revision 1.1 2003/12/13 03:05:27 ksekar
-<rdar://problem/3192548>: DynDNS: Unicast query of service records
-
-
*/
#ifndef __UDNS_H_
#endif
#define RESTART_GOODBYE_DELAY (6 * mDNSPlatformOneSecond) // delay after restarting LLQ before nuking previous known answers (avoids flutter if we restart before we have networking up)
-#define MIN_UCAST_PERIODIC_EXEC (5 * mDNSPlatformOneSecond)
#define INIT_UCAST_POLL_INTERVAL (3 * mDNSPlatformOneSecond) // this interval is used after send failures on network transitions
// which typically heal quickly, so we start agressively and exponentially back off
#define MAX_UCAST_POLL_INTERVAL (60 * 60 * mDNSPlatformOneSecond)
+//#define MAX_UCAST_POLL_INTERVAL (1 * 60 * mDNSPlatformOneSecond)
#define LLQ_POLL_INTERVAL (15 * 60 * mDNSPlatformOneSecond) // Polling interval for zones w/ an advertised LLQ port (ie not static zones) if LLQ fails due to NAT, etc.
#define RESPONSE_WINDOW (60 * mDNSPlatformOneSecond) // require server responses within one minute of request
-#define UPDATE_PORT_NAME "_dns-update._udp."
-#define LLQ_PORT_NAME "_dns-llq._udp"
+#define MAX_UCAST_UNANSWERED_QUERIES 2 // the number of unanswered queries from any one uDNS server before trying another server
+#define DNSSERVER_PENALTY_TIME (60 * mDNSPlatformOneSecond) // number of seconds for which new questions don't pick this server
+
#define DEFAULT_UPDATE_LEASE 7200
-
+
+#define QuestionIntervalStep 3
+#define QuestionIntervalStep2 (QuestionIntervalStep*QuestionIntervalStep)
+#define QuestionIntervalStep3 (QuestionIntervalStep*QuestionIntervalStep*QuestionIntervalStep)
+#define InitialQuestionInterval ((mDNSPlatformOneSecond + QuestionIntervalStep-1) / QuestionIntervalStep)
+
+// For Unicast record registrations, we initialize the interval to 1 second. When we send any query for
+// the record registration e.g., GetZoneData, we always back off by QuestionIntervalStep
+// so that the first retry does not happen until 3 seconds which should be enough for TCP/TLS to be done.
+#define INIT_RECORD_REG_INTERVAL (1 * mDNSPlatformOneSecond)
+#define MAX_RECORD_REG_INTERVAL (15 * 60 * mDNSPlatformOneSecond)
+#define MERGE_DELAY_TIME (1 * mDNSPlatformOneSecond)
+
+// If we are refreshing, we do it at least 5 times with a min update frequency of
+// 5 minutes
+#define MAX_UPDATE_REFRESH_COUNT 5
+#define MIN_UPDATE_REFRESH_TIME (5 * 60 * mDNSPlatformOneSecond)
// Entry points into unicast-specific routines
-extern mStatus uDNS_StartQuery(mDNS *const m, DNSQuestion *const question);
-extern mDNSBool uDNS_IsActiveQuery(DNSQuestion *const question, uDNS_GlobalInfo *u); // returns true if OK to call StopQuery
-extern mStatus uDNS_StopQuery(mDNS *const m, DNSQuestion *const question);
-
-extern void uDNS_Init(mDNS *const m);
-extern void uDNS_Sleep(mDNS *const m);
-extern void uDNS_Wake(mDNS *const m);
-#define uDNS_Close uDNS_Sleep
-
+extern void LLQGotZoneData(mDNS *const m, mStatus err, const ZoneData *zoneInfo);
+extern void startLLQHandshake(mDNS *m, DNSQuestion *q);
+extern void sendLLQRefresh(mDNS *m, DNSQuestion *q);
+
+extern void SleepRecordRegistrations(mDNS *m);
+
// uDNS_UpdateRecord
// following fields must be set, and the update validated, upon entry.
// rr->NewRData
// rr->newrdlength
// rr->UpdateCallback
-extern mStatus uDNS_AddRecordToService(mDNS *const m, ServiceRecordSet *sr, ExtraResourceRecord *extra);
extern mStatus uDNS_UpdateRecord(mDNS *m, AuthRecord *rr);
-
-extern mStatus uDNS_RegisterRecord(mDNS *const m, AuthRecord *const rr);
-extern mStatus uDNS_DeregisterRecord(mDNS *const m, AuthRecord *const rr);
-extern mStatus uDNS_RegisterService(mDNS *const m, ServiceRecordSet *srs);
-extern mStatus uDNS_DeregisterService(mDNS *const m, ServiceRecordSet *srs);
+extern void SetNextQueryTime(mDNS *const m, const DNSQuestion *const q);
+extern CacheGroup *CacheGroupForName(const mDNS *const m, const mDNSu32 slot, const mDNSu32 namehash, const domainname *const name);
+extern mStatus mDNS_Register_internal(mDNS *const m, AuthRecord *const rr);
+extern mStatus mDNS_Deregister_internal(mDNS *const m, AuthRecord *const rr, mDNS_Dereg_type drt);
+extern mStatus mDNS_StartQuery_internal(mDNS *const m, DNSQuestion *const question);
+extern mStatus mDNS_StopQuery_internal(mDNS *const m, DNSQuestion *const question);
+extern mStatus mDNS_StartNATOperation_internal(mDNS *const m, NATTraversalInfo *traversal);
+
+extern void RecordRegistrationGotZoneData(mDNS *const m, mStatus err, const ZoneData *zoneData);
+extern mStatus uDNS_DeregisterRecord(mDNS *const m, AuthRecord *const rr);
+extern const domainname *GetServiceTarget(mDNS *m, AuthRecord *const rr);
+extern void uDNS_CheckCurrentQuestion(mDNS *const m);
// integer fields of msg header must be in HOST byte order before calling this routine
extern void uDNS_ReceiveMsg(mDNS *const m, DNSMessage *const msg, const mDNSu8 *const end,
- const mDNSAddr *const srcaddr, const mDNSIPPort srcport, const mDNSAddr *const dstaddr,
- const mDNSIPPort dstport, const mDNSInterfaceID InterfaceID);
+ const mDNSAddr *const srcaddr, const mDNSIPPort srcport);
+
+extern void uDNS_Tasks(mDNS *const m);
+extern void UpdateAllSRVRecords(mDNS *m);
+extern void CheckNATMappings(mDNS *m);
+
+extern mStatus uDNS_SetupDNSConfig(mDNS *const m);
+
+// uDNS_SetupSearchDomains by default adds search domains. It also can be called with one or
+// more values for "action" which does the following:
+//
+// -UDNS_START_WAB_QUERY - start Wide Area Bonjour (domain enumeration) queries
+// -UDNS_START_CF_QUERY - start Configuration query
+
+#define UDNS_START_WAB_QUERY 0x00000001
+#define UDNS_START_CF_QUERY 0x00000002
+
+extern mStatus uDNS_SetupSearchDomains(mDNS *const m, int action);
+
+typedef enum
+ {
+ uDNS_LLQ_Not = 0, // Normal uDNS answer: Flush any stale records from cache, and respect record TTL
+ uDNS_LLQ_Ignore, // LLQ initial challenge packet: ignore -- has no useful records for us
+ uDNS_LLQ_Entire, // LLQ initial set of answers: Flush any stale records from cache, but assume TTL is 2 x LLQ refresh interval
+ uDNS_LLQ_Events // LLQ event packet: don't flush cache; assume TTL is 2 x LLQ refresh interval
+ } uDNS_LLQType;
+
+extern uDNS_LLQType uDNS_recvLLQResponse(mDNS *const m, const DNSMessage *const msg, const mDNSu8 *const end, const mDNSAddr *const srcaddr, const mDNSIPPort srcport, DNSQuestion **matchQuestion);
+extern DomainAuthInfo *GetAuthInfoForName_internal(mDNS *m, const domainname *const name);
+extern DomainAuthInfo *GetAuthInfoForQuestion(mDNS *m, const DNSQuestion *const q);
+extern void DisposeTCPConn(struct tcpInfo_t *tcp);
-extern void uDNS_ReceiveNATMap(mDNS *m, mDNSu8 *pkt, mDNSu16 len);
-
-// returns time of next scheduled event
-extern void uDNS_Execute(mDNS *const m);
+// NAT traversal
+extern void uDNS_ReceiveNATPMPPacket(mDNS *m, const mDNSInterfaceID InterfaceID, mDNSu8 *pkt, mDNSu16 len); // Called for each received NAT-PMP packet
+extern void natTraversalHandleAddressReply(mDNS *const m, mDNSu16 err, mDNSv4Addr ExtAddr);
+extern void natTraversalHandlePortMapReply(mDNS *const m, NATTraversalInfo *n, const mDNSInterfaceID InterfaceID, mDNSu16 err, mDNSIPPort extport, mDNSu32 lease);
-
#ifdef __cplusplus
}
#endif
projects / apple / mdnsresponder.git / blobdiff