/* -*- Mode: C; tab-width: 4 -*-
*
- * Copyright (c) 2002-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2002-2018 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * 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.
- *
- * 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
+ * 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
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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@
*
- * Formatting notes:
- * This code follows the "Whitesmiths style" C indentation rules. Plenty of discussion
- * on C indentation can be found on the web, such as <http://www.kafejo.com/komp/1tbs.htm>,
- * but for the sake of brevity here I will say just this: Curly braces are not syntactially
- * part of an "if" statement; they are the beginning and ending markers of a compound statement;
- * therefore common sense dictates that if they are part of a compound statement then they
- * should be indented to the same level as everything else in that compound statement.
- * Indenting curly braces at the same level as the "if" implies that curly braces are
- * part of the "if", which is false. (This is as misleading as people who write "char* x,y;"
- * thinking that variables x and y are both of type "char*" -- and anyone who doesn't
- * understand why variable y is not of type "char*" just proves the point that poor code
- * layout leads people to unfortunate misunderstandings about how the C language really works.)
-
- Change History (most recent first):
-
-$Log: Identify.c,v $
-Revision 1.34 2004/12/16 20:17:11 cheshire
-<rdar://problem/3324626> Cache memory management improvements
-
-Revision 1.33 2004/11/30 22:37:00 cheshire
-Update copyright dates and add "Mode: C; tab-width: 4" headers
-
-Revision 1.32 2004/10/19 21:33:21 cheshire
-<rdar://problem/3844991> Cannot resolve non-local registrations using the mach API
-Added flag 'kDNSServiceFlagsForceMulticast'. Passing through an interface id for a unicast name
-doesn't force multicast unless you set this flag to indicate explicitly that this is what you want
-
-Revision 1.31 2004/10/16 00:17:00 cheshire
-<rdar://problem/3770558> Replace IP TTL 255 check with local subnet source address check
-
-Revision 1.30 2004/09/21 23:29:51 cheshire
-<rdar://problem/3680045> DNSServiceResolve should delay sending packets
-
-Revision 1.29 2004/09/17 01:08:53 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 1.28 2004/09/17 00:31:52 cheshire
-For consistency with ipv6, renamed rdata field 'ip' to 'ipv4'
-
-Revision 1.27 2004/09/16 01:58:22 cheshire
-Fix compiler warnings
-
-Revision 1.26 2004/08/24 21:55:07 cheshire
-Don't try to build IPv6 code on systems that don't have IPv6
-
-Revision 1.25 2004/07/20 23:42:37 cheshire
-Update to use only "_services._dns-sd._udp.local." meta-query for service enumeration
-
-Revision 1.24 2004/06/15 02:39:47 cheshire
-When displaying error message, only show command name, not entire path
-
-Revision 1.23 2004/05/18 23:51:26 cheshire
-Tidy up all checkin comments to use consistent "<rdar://problem/xxxxxxx>" format for bug numbers
-
-Revision 1.22 2004/04/20 22:43:28 cheshire
-Use _services._dns-sd._udp query, as documented in
-<http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd-02.txt>
-
-Revision 1.21 2004/01/28 21:38:57 cheshire
-Also ask target host for _services._mdns._udp.local. list
-
-Revision 1.20 2004/01/28 19:04:38 cheshire
-Fix Ctrl-C handling when multiple targets are specified
-
-Revision 1.19 2004/01/28 03:49:30 cheshire
-Enhanced mDNSIdentify to make use of new targeted-query capability
-
-Revision 1.18 2004/01/27 19:06:51 cheshire
-Remove workaround for WWDC 2003 bug; no one has run that buggy build for a long time
-
-Revision 1.17 2004/01/22 03:57:00 cheshire
-Use the new meta-interface mDNSInterface_ForceMCast. This restores mDNSIdentify's
-ability to use multicast queries with non-link-local target addresses, like 17.x.x.x.
-
-Revision 1.16 2004/01/22 00:03:32 cheshire
-Add while() loop so that a list of targets may be specified on the command line
-
-Revision 1.15 2004/01/21 21:55:06 cheshire
-Don't need to wait for timeout once we've got the information we wanted
-
-Revision 1.14 2003/12/17 00:51:22 cheshire
-Changed mDNSNetMonitor and mDNSIdentify to link the object files
-instead of #including the "DNSCommon.c" "uDNS.c" and source files
-
-Revision 1.13 2003/12/13 03:05:28 ksekar
-<rdar://problem/3192548>: DynDNS: Unicast query of service records
-
-Revision 1.12 2003/11/14 21:27:09 cheshire
-<rdar://problem/3484766>: Security: Crashing bug in mDNSResponder
-Fix code that should use buffer size MAX_ESCAPED_DOMAIN_NAME (1005) instead of 256-byte buffers.
-
-Revision 1.11 2003/10/30 19:26:38 cheshire
-Fix warnings on certain compilers
-
-Revision 1.10 2003/09/02 20:38:57 cheshire
-#include <signal.h> for Linux
-
-Revision 1.9 2003/08/14 23:57:46 cheshire
-Report if there is no answer at all from the target host
-
-Revision 1.8 2003/08/14 02:19:55 cheshire
-<rdar://problem/3375491> Split generic ResourceRecord type into two separate types: AuthRecord and CacheRecord
-
-Revision 1.7 2003/08/12 19:56:26 cheshire
-Update to APSL 2.0
-
-Revision 1.6 2003/08/06 01:46:18 cheshire
-Distinguish no answer from partial answer
-
-Revision 1.5 2003/08/05 23:56:26 cheshire
-Update code to compile with the new mDNSCoreReceive() function that requires a TTL
-(Right now mDNSPosix.c just reports 255 -- we should fix this)
-
-Revision 1.4 2003/08/04 17:24:48 cheshire
-Combine the three separate A/AAAA/HINFO queries into a single qtype "ANY" query
-
-Revision 1.3 2003/08/04 17:14:08 cheshire
-Do both AAAA queries in parallel
-
-Revision 1.2 2003/08/02 02:25:13 cheshire
-Multiple improvements: Now displays host's name, and all v4 and v6 addresses, as well as HINFO record
-
-Revision 1.1 2003/08/01 02:20:02 cheshire
-Add mDNSIdentify tool, used to discover what version of mDNSResponder a particular host is running
-
*/
//*************************************************************************************************************
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
-#include <netinet/in_systm.h> // For n_long, required by <netinet/ip.h> below
-#include <netinet/ip.h> // For IPTOS_LOWDELAY etc.
+#include <netinet/in_systm.h> // For n_long, required by <netinet/ip.h> below
+#include <netinet/ip.h> // For IPTOS_LOWDELAY etc.
#include <arpa/inet.h>
#include <signal.h>
-#include "mDNSEmbeddedAPI.h"// Defines the interface to the mDNS core code
+#include "mDNSEmbeddedAPI.h" // Defines the interface to the mDNS core code
#include "mDNSPosix.h" // Defines the specific types needed to run mDNS on this platform
#include "ExampleClientApp.h"
//*************************************************************************************************************
// Globals
-static mDNS mDNSStorage; // mDNS core uses this to store its globals
+mDNS mDNSStorage; // mDNS core uses this to store its globals
static mDNS_PlatformSupport PlatformStorage; // Stores this platform's globals
#define RR_CACHE_SIZE 500
static CacheEntity gRRCache[RR_CACHE_SIZE];
+mDNSexport const char ProgramName[] = "mDNSIdentify";
-static volatile int StopNow; // 0 means running, 1 means stop because we got an answer, 2 means stop because of Ctrl-C
+static volatile int StopNow; // 0 means running, 1 means stop because we got an answer, 2 means stop because of Ctrl-C
static volatile int NumAnswers, NumAddr, NumAAAA, NumHINFO;
static char hostname[MAX_ESCAPED_DOMAIN_NAME], hardware[256], software[256];
static mDNSAddr lastsrc, hostaddr, target;
// Special version of printf that knows how to print IP addresses, DNS-format name strings, etc.
mDNSlocal mDNSu32 mprintf(const char *format, ...) IS_A_PRINTF_STYLE_FUNCTION(1,2);
mDNSlocal mDNSu32 mprintf(const char *format, ...)
- {
- mDNSu32 length;
- unsigned char buffer[512];
- va_list ptr;
- va_start(ptr,format);
- length = mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr);
- va_end(ptr);
- printf("%s", buffer);
- return(length);
- }
+{
+ mDNSu32 length;
+ unsigned char buffer[512];
+ va_list ptr;
+ va_start(ptr,format);
+ length = mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr);
+ va_end(ptr);
+ printf("%s", buffer);
+ return(length);
+}
//*************************************************************************************************************
// Main code
mDNSexport void mDNSCoreReceive(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)
- {
- (void)dstaddr; // Unused
- // Snag copy of header ID, then call through
- lastid = msg->h.id;
- lastsrc = *srcaddr;
-
- // We *want* to allow off-net unicast responses here.
- // For now, the simplest way to allow that is to pretend it was received via multicast so that mDNSCore doesn't reject the packet
- __MDNS__mDNSCoreReceive(m, msg, end, srcaddr, srcport, &AllDNSLinkGroup_v4, dstport, InterfaceID);
- }
-
-static void NameCallback(mDNS *const m, DNSQuestion *question, const ResourceRecord *const answer, mDNSBool AddRecord)
- {
- (void)m; // Unused
- (void)question; // Unused
- (void)AddRecord;// Unused
- if (!id.NotAnInteger) id = lastid;
- if (answer->rrtype == kDNSType_PTR || answer->rrtype == kDNSType_CNAME)
- {
- ConvertDomainNameToCString(&answer->rdata->u.name, hostname);
- StopNow = 1;
- mprintf("%##s %s %##s\n", answer->name->c, DNSTypeName(answer->rrtype), answer->rdata->u.name.c);
- }
- }
-
-static void InfoCallback(mDNS *const m, DNSQuestion *question, const ResourceRecord *const answer, mDNSBool AddRecord)
- {
- (void)m; // Unused
- (void)question; // Unused
- (void)AddRecord;// Unused
- if (answer->rrtype == kDNSType_A)
- {
- if (!id.NotAnInteger) id = lastid;
- NumAnswers++;
- NumAddr++;
- mprintf("%##s %s %.4a\n", answer->name->c, DNSTypeName(answer->rrtype), &answer->rdata->u.ipv4);
- hostaddr.type = mDNSAddrType_IPv4; // Prefer v4 target to v6 target, for now
- hostaddr.ip.v4 = answer->rdata->u.ipv4;
- }
- else if (answer->rrtype == kDNSType_AAAA)
- {
- if (!id.NotAnInteger) id = lastid;
- NumAnswers++;
- NumAAAA++;
- mprintf("%##s %s %.16a\n", answer->name->c, DNSTypeName(answer->rrtype), &answer->rdata->u.ipv6);
- if (!hostaddr.type) // Prefer v4 target to v6 target, for now
- {
- hostaddr.type = mDNSAddrType_IPv6;
- hostaddr.ip.v6 = answer->rdata->u.ipv6;
- }
- }
- else if (answer->rrtype == kDNSType_HINFO)
- {
- mDNSu8 *p = answer->rdata->u.data;
- strncpy(hardware, (char*)(p+1), p[0]);
- hardware[p[0]] = 0;
- p += 1 + p[0];
- strncpy(software, (char*)(p+1), p[0]);
- software[p[0]] = 0;
- NumAnswers++;
- NumHINFO++;
- }
-
- // If we've got everything we're looking for, don't need to wait any more
- if (NumHINFO && (NumAddr || NumAAAA)) StopNow = 1;
- }
-
-static void ServicesCallback(mDNS *const m, DNSQuestion *question, const ResourceRecord *const answer, mDNSBool AddRecord)
- {
- (void)m; // Unused
- (void)question; // Unused
- (void)AddRecord;// Unused
- // Right now the mDNSCore targeted-query code is incomplete --
- // it issues targeted queries, but accepts answers from anywhere
- // For now, we'll just filter responses here so we don't get confused by responses from someone else
- if (answer->rrtype == kDNSType_PTR && mDNSSameAddress(&lastsrc, &target))
- {
- NumAnswers++;
- NumAddr++;
- mprintf("%##s %s %##s\n", answer->name->c, DNSTypeName(answer->rrtype), answer->rdata->u.name.c);
- StopNow = 1;
- }
- }
-
-mDNSexport void WaitForAnswer(mDNS *const m, int seconds)
- {
- struct timeval end;
- gettimeofday(&end, NULL);
- end.tv_sec += seconds;
- StopNow = 0;
- NumAnswers = 0;
- while (!StopNow)
- {
- int nfds = 0;
- fd_set readfds;
- struct timeval now, remain = end;
- int result;
-
- FD_ZERO(&readfds);
- gettimeofday(&now, NULL);
- if (remain.tv_usec < now.tv_usec) { remain.tv_usec += 1000000; remain.tv_sec--; }
- if (remain.tv_sec < now.tv_sec) return;
- remain.tv_usec -= now.tv_usec;
- remain.tv_sec -= now.tv_sec;
- mDNSPosixGetFDSet(m, &nfds, &readfds, &remain);
- result = select(nfds, &readfds, NULL, NULL, &remain);
- if (result >= 0) mDNSPosixProcessFDSet(m, &readfds);
- else if (errno != EINTR) StopNow = 2;
- }
- }
+ const mDNSAddr *const srcaddr, const mDNSIPPort srcport, const mDNSAddr *const dstaddr, const mDNSIPPort dstport,
+ const mDNSInterfaceID InterfaceID)
+{
+ (void)dstaddr; // Unused
+ // Snag copy of header ID, then call through
+ lastid = msg->h.id;
+ lastsrc = *srcaddr;
+
+ // We *want* to allow off-net unicast responses here.
+ // For now, the simplest way to allow that is to pretend it was received via multicast so that mDNSCore doesn't reject the packet
+ __MDNS__mDNSCoreReceive(m, msg, end, srcaddr, srcport, &AllDNSLinkGroup_v4, dstport, InterfaceID);
+}
+
+mDNSlocal void NameCallback(mDNS *const m, DNSQuestion *question, const ResourceRecord *const answer, QC_result AddRecord)
+{
+ (void)m; // Unused
+ (void)question; // Unused
+ (void)AddRecord; // Unused
+ if (!id.NotAnInteger) id = lastid;
+ if (answer->rrtype == kDNSType_PTR || answer->rrtype == kDNSType_CNAME)
+ {
+ ConvertDomainNameToCString(&answer->rdata->u.name, hostname);
+ StopNow = 1;
+ mprintf("%##s %s %##s\n", answer->name->c, DNSTypeName(answer->rrtype), answer->rdata->u.name.c);
+ }
+}
+
+mDNSlocal void InfoCallback(mDNS *const m, DNSQuestion *question, const ResourceRecord *const answer, QC_result AddRecord)
+{
+ (void)m; // Unused
+ (void)question; // Unused
+ (void)AddRecord; // Unused
+ if (answer->rrtype == kDNSType_A)
+ {
+ if (!id.NotAnInteger) id = lastid;
+ NumAnswers++;
+ NumAddr++;
+ mprintf("%##s %s %.4a\n", answer->name->c, DNSTypeName(answer->rrtype), &answer->rdata->u.ipv4);
+ hostaddr.type = mDNSAddrType_IPv4; // Prefer v4 target to v6 target, for now
+ hostaddr.ip.v4 = answer->rdata->u.ipv4;
+ }
+ else if (answer->rrtype == kDNSType_AAAA)
+ {
+ if (!id.NotAnInteger) id = lastid;
+ NumAnswers++;
+ NumAAAA++;
+ mprintf("%##s %s %.16a\n", answer->name->c, DNSTypeName(answer->rrtype), &answer->rdata->u.ipv6);
+ if (!hostaddr.type) // Prefer v4 target to v6 target, for now
+ {
+ hostaddr.type = mDNSAddrType_IPv6;
+ hostaddr.ip.v6 = answer->rdata->u.ipv6;
+ }
+ }
+ else if (answer->rrtype == kDNSType_HINFO)
+ {
+ mDNSu8 *p = answer->rdata->u.data;
+ strncpy(hardware, (char*)(p+1), p[0]);
+ hardware[p[0]] = 0;
+ p += 1 + p[0];
+ strncpy(software, (char*)(p+1), p[0]);
+ software[p[0]] = 0;
+ NumAnswers++;
+ NumHINFO++;
+ }
+
+ // If we've got everything we're looking for, don't need to wait any more
+ if (/*NumHINFO && */ (NumAddr || NumAAAA)) StopNow = 1;
+}
+
+mDNSlocal void ServicesCallback(mDNS *const m, DNSQuestion *question, const ResourceRecord *const answer, QC_result AddRecord)
+{
+ (void)m; // Unused
+ (void)question; // Unused
+ (void)AddRecord; // Unused
+ // Right now the mDNSCore targeted-query code is incomplete --
+ // it issues targeted queries, but accepts answers from anywhere
+ // For now, we'll just filter responses here so we don't get confused by responses from someone else
+ if (answer->rrtype == kDNSType_PTR && mDNSSameAddress(&lastsrc, &target))
+ {
+ NumAnswers++;
+ mprintf("%##s %s %##s\n", answer->name->c, DNSTypeName(answer->rrtype), answer->rdata->u.name.c);
+ }
+}
+
+mDNSlocal void WaitForAnswer(mDNS *const m, int seconds)
+{
+ struct timeval end;
+ gettimeofday(&end, NULL);
+ end.tv_sec += seconds;
+ StopNow = 0;
+ NumAnswers = 0;
+ while (!StopNow)
+ {
+ int nfds = 0;
+ fd_set readfds, writefds;
+ struct timeval now, remain = end;
+ int result;
+
+ FD_ZERO(&readfds);
+ FD_ZERO(&writefds);
+ gettimeofday(&now, NULL);
+ if (remain.tv_usec < now.tv_usec) { remain.tv_usec += 1000000; remain.tv_sec--; }
+ if (remain.tv_sec < now.tv_sec)
+ {
+ if (!NumAnswers) printf("No response after %d seconds\n", seconds);
+ return;
+ }
+ remain.tv_usec -= now.tv_usec;
+ remain.tv_sec -= now.tv_sec;
+ mDNSPosixGetFDSet(m, &nfds, &readfds, &writefds, &remain);
+ result = select(nfds, &readfds, &writefds, NULL, &remain);
+ if (result >= 0) mDNSPosixProcessFDSet(m, &readfds, &writefds);
+ else if (errno != EINTR) StopNow = 2;
+ }
+}
mDNSlocal mStatus StartQuery(DNSQuestion *q, char *qname, mDNSu16 qtype, const mDNSAddr *target, mDNSQuestionCallback callback)
- {
- if (qname) MakeDomainNameFromDNSNameString(&q->qname, qname);
- q->Target = target ? *target : zeroAddr;
- q->TargetPort = MulticastDNSPort;
- q->TargetQID = zeroID;
- q->InterfaceID = mDNSInterface_Any;
- q->qtype = qtype;
- q->qclass = kDNSClass_IN;
- q->LongLived = mDNSfalse;
- q->ExpectUnique = mDNStrue;
- q->ForceMCast = mDNStrue; // Query via multicast, even for apparently uDNS names like 1.1.1.17.in-addr.arpa.
- q->QuestionCallback = callback;
- q->QuestionContext = NULL;
-
- //mprintf("%##s %s ?\n", q->qname.c, DNSTypeName(qtype));
- return(mDNS_StartQuery(&mDNSStorage, q));
- }
+{
+ lastsrc = zeroAddr;
+ if (qname) MakeDomainNameFromDNSNameString(&q->qname, qname);
+ q->InterfaceID = mDNSInterface_Any;
+ q->flags = 0;
+ q->Target = target ? *target : zeroAddr;
+ q->TargetPort = MulticastDNSPort;
+ q->TargetQID = zeroID;
+ q->qtype = qtype;
+ q->qclass = kDNSClass_IN;
+ q->LongLived = mDNSfalse;
+ q->ExpectUnique = mDNSfalse; // Don't want to stop after the first response packet
+ q->ForceMCast = mDNStrue; // Query via multicast, even for apparently uDNS names like 1.1.1.17.in-addr.arpa.
+ q->ReturnIntermed = mDNStrue;
+ q->SuppressUnusable = mDNSfalse;
+ q->AppendSearchDomains = 0;
+ q->TimeoutQuestion = 0;
+ q->ValidationRequired = 0;
+ q->ValidatingResponse = 0;
+ q->WakeOnResolve = 0;
+ q->UseBackgroundTraffic = mDNSfalse;
+ q->ProxyQuestion = 0;
+ q->pid = mDNSPlatformGetPID();
+ q->QuestionCallback = callback;
+ q->QuestionContext = NULL;
+
+ //mprintf("%##s %s ?\n", q->qname.c, DNSTypeName(qtype));
+ return(mDNS_StartQuery(&mDNSStorage, q));
+}
mDNSlocal void DoOneQuery(DNSQuestion *q, char *qname, mDNSu16 qtype, const mDNSAddr *target, mDNSQuestionCallback callback)
- {
- mStatus status = StartQuery(q, qname, qtype, target, callback);
- if (status != mStatus_NoError)
- StopNow = 2;
- else
- {
- WaitForAnswer(&mDNSStorage, 4);
- mDNS_StopQuery(&mDNSStorage, q);
- }
- }
+{
+ mStatus status = StartQuery(q, qname, qtype, target, callback);
+ if (status != mStatus_NoError)
+ StopNow = 2;
+ else
+ {
+ WaitForAnswer(&mDNSStorage, 4);
+ mDNS_StopQuery(&mDNSStorage, q);
+ }
+}
mDNSlocal int DoQuery(DNSQuestion *q, char *qname, mDNSu16 qtype, const mDNSAddr *target, mDNSQuestionCallback callback)
- {
- DoOneQuery(q, qname, qtype, target, callback);
- if (StopNow == 0 && target && target->type)
- {
- mprintf("%##s %s Trying multicast\n", q->qname.c, DNSTypeName(q->qtype));
- DoOneQuery(q, qname, qtype, NULL, callback);
- }
- if (StopNow == 0 && NumAnswers == 0)
- mprintf("%##s %s *** No Answer ***\n", q->qname.c, DNSTypeName(q->qtype));
- return(StopNow);
- }
+{
+ DoOneQuery(q, qname, qtype, target, callback);
+ if (StopNow == 0 && NumAnswers == 0 && target && target->type)
+ {
+ mprintf("%##s %s Trying multicast\n", q->qname.c, DNSTypeName(q->qtype));
+ DoOneQuery(q, qname, qtype, NULL, callback);
+ }
+ if (StopNow == 0 && NumAnswers == 0)
+ mprintf("%##s %s *** No Answer ***\n", q->qname.c, DNSTypeName(q->qtype));
+ return(StopNow);
+}
mDNSlocal void HandleSIG(int signal)
- {
- (void)signal; // Unused
- debugf("%s","");
- debugf("HandleSIG");
- StopNow = 2;
- }
+{
+ (void)signal; // Unused
+ debugf("%s","");
+ debugf("HandleSIG");
+ StopNow = 2;
+}
mDNSexport int main(int argc, char **argv)
- {
- const char *progname = strrchr(argv[0], '/') ? strrchr(argv[0], '/') + 1 : argv[0];
- int this_arg = 1;
- mStatus status;
- struct in_addr s4;
+{
+ const char *progname = strrchr(argv[0], '/') ? strrchr(argv[0], '/') + 1 : argv[0];
+ int this_arg = 1;
+ mStatus status;
+ struct in_addr s4;
#if HAVE_IPV6
- struct in6_addr s6;
+ struct in6_addr s6;
#endif
- char buffer[256];
- DNSQuestion q;
-
- if (argc < 2) goto usage;
-
- // Since this is a special command-line tool, we want LogMsg() errors to go to stderr, not syslog
- mDNS_DebugMode = mDNStrue;
-
+ char buffer[256];
+ DNSQuestion q;
+
+ if (argc < 2) goto usage;
+
+ // Since this is a special command-line tool, we want LogMsg() errors to go to stderr, not syslog
+ mDNS_DebugMode = mDNStrue;
+
// Initialise the mDNS core.
- status = mDNS_Init(&mDNSStorage, &PlatformStorage,
- gRRCache, RR_CACHE_SIZE,
- mDNS_Init_DontAdvertiseLocalAddresses,
- mDNS_Init_NoInitCallback, mDNS_Init_NoInitCallbackContext);
- if (status) { fprintf(stderr, "Daemon start: mDNS_Init failed %ld\n", status); return(status); }
-
- signal(SIGINT, HandleSIG); // SIGINT is what you get for a Ctrl-C
- signal(SIGTERM, HandleSIG);
-
- while (this_arg < argc)
- {
- char *arg = argv[this_arg++];
- if (this_arg > 2) printf("\n");
-
- lastid = id = zeroID;
- hostaddr = target = zeroAddr;
- hostname[0] = hardware[0] = software[0] = 0;
- NumAddr = NumAAAA = NumHINFO = 0;
-
- if (inet_pton(AF_INET, arg, &s4) == 1)
- {
- mDNSu8 *p = (mDNSu8 *)&s4;
- mDNS_snprintf(buffer, sizeof(buffer), "%d.%d.%d.%d.in-addr.arpa.", p[3], p[2], p[1], p[0]);
- printf("%s\n", buffer);
- target.type = mDNSAddrType_IPv4;
- target.ip.v4.NotAnInteger = s4.s_addr;
- DoQuery(&q, buffer, kDNSType_PTR, &target, NameCallback);
- if (StopNow == 2) break;
- }
+ status = mDNS_Init(&mDNSStorage, &PlatformStorage,
+ gRRCache, RR_CACHE_SIZE,
+ mDNS_Init_DontAdvertiseLocalAddresses,
+ mDNS_Init_NoInitCallback, mDNS_Init_NoInitCallbackContext);
+ if (status) { fprintf(stderr, "Daemon start: mDNS_Init failed %d\n", (int)status); return(status); }
+
+ signal(SIGINT, HandleSIG); // SIGINT is what you get for a Ctrl-C
+ signal(SIGTERM, HandleSIG);
+
+ while (this_arg < argc)
+ {
+ char *arg = argv[this_arg++];
+ if (this_arg > 2) printf("\n");
+
+ lastid = id = zeroID;
+ hostaddr = target = zeroAddr;
+ hostname[0] = hardware[0] = software[0] = 0;
+ NumAddr = NumAAAA = NumHINFO = 0;
+
+ if (inet_pton(AF_INET, arg, &s4) == 1)
+ {
+ mDNSu8 *p = (mDNSu8 *)&s4;
+ // Note: This is reverse order compared to a normal dotted-decimal IP address, so we can't use our customary "%.4a" format code
+ mDNS_snprintf(buffer, sizeof(buffer), "%d.%d.%d.%d.in-addr.arpa.", p[3], p[2], p[1], p[0]);
+ printf("%s\n", buffer);
+ target.type = mDNSAddrType_IPv4;
+ target.ip.v4.NotAnInteger = s4.s_addr;
+ DoQuery(&q, buffer, kDNSType_PTR, &target, NameCallback);
+ if (StopNow == 2) break;
+ }
#if HAVE_IPV6
- else if (inet_pton(AF_INET6, arg, &s6) == 1)
- {
- int i;
- mDNSu8 *p = (mDNSu8 *)&s6;
- for (i = 0; i < 16; i++)
- {
- static const char hexValues[] = "0123456789ABCDEF";
- buffer[i * 4 ] = hexValues[p[15-i] & 0x0F];
- buffer[i * 4 + 1] = '.';
- buffer[i * 4 + 2] = hexValues[p[15-i] >> 4];
- buffer[i * 4 + 3] = '.';
- }
- mDNS_snprintf(&buffer[64], sizeof(buffer)-64, "ip6.arpa.");
- target.type = mDNSAddrType_IPv6;
- bcopy(&s6, &target.ip.v6, sizeof(target.ip.v6));
- DoQuery(&q, buffer, kDNSType_PTR, &target, NameCallback);
- if (StopNow == 2) break;
- }
+ else if (inet_pton(AF_INET6, arg, &s6) == 1)
+ {
+ int i;
+ mDNSu8 *p = (mDNSu8 *)&s6;
+ for (i = 0; i < 16; i++)
+ {
+ static const char hexValues[] = "0123456789ABCDEF";
+ buffer[i * 4 ] = hexValues[p[15-i] & 0x0F];
+ buffer[i * 4 + 1] = '.';
+ buffer[i * 4 + 2] = hexValues[p[15-i] >> 4];
+ buffer[i * 4 + 3] = '.';
+ }
+ mDNS_snprintf(&buffer[64], sizeof(buffer)-64, "ip6.arpa.");
+ target.type = mDNSAddrType_IPv6;
+ mDNSPlatformMemCopy(&target.ip.v6, &s6, sizeof(target.ip.v6));
+ DoQuery(&q, buffer, kDNSType_PTR, &target, NameCallback);
+ if (StopNow == 2) break;
+ }
#endif
- else
- strcpy(hostname, arg);
-
- // Now we have the host name; get its A, AAAA, and HINFO
- if (hostname[0]) DoQuery(&q, hostname, kDNSQType_ANY, &target, InfoCallback);
- if (StopNow == 2) break;
-
- if (hardware[0] || software[0])
- {
- DNSQuestion q1;
- printf("HINFO Hardware: %s\n", hardware);
- printf("HINFO Software: %s\n", software);
- // We need to make sure the services query is targeted
- if (target.type == 0) target = hostaddr;
- StartQuery(&q1, "_services._dns-sd._udp.local.", kDNSQType_ANY, &target, ServicesCallback);
- WaitForAnswer(&mDNSStorage, 4);
- mDNS_StopQuery(&mDNSStorage, &q1);
- if (StopNow == 2) break;
- }
- else if (NumAnswers)
- {
- printf("Host has no HINFO record; Best guess is ");
- if (id.b[1]) printf("mDNSResponder-%d\n", id.b[1]);
- else if (NumAAAA) printf("very early Panther build (mDNSResponder-33 or earlier)\n");
- else printf("Jaguar version of mDNSResponder with no IPv6 support\n");
- }
- else
- printf("Incorrect dot-local hostname, address, or no mDNSResponder running on that machine\n");
- }
-
- mDNS_Close(&mDNSStorage);
- return(0);
+ else
+ {
+ if (strlen(arg) >= sizeof(hostname))
+ {
+ fprintf(stderr, "hostname must be < %d characters\n", (int)sizeof(hostname));
+ goto usage;
+ }
+ strcpy(hostname, arg);
+ }
+
+ // Now we have the host name; get its A, AAAA, and HINFO
+ if (hostname[0]) DoQuery(&q, hostname, kDNSQType_ANY, &target, InfoCallback);
+ if (StopNow == 2) break;
+
+ if (hardware[0] || software[0])
+ {
+ printf("HINFO Hardware: %s\n", hardware);
+ printf("HINFO Software: %s\n", software);
+ }
+ else if (NumAnswers) printf("%s has no HINFO record\n", hostname);
+ else printf("Incorrect dot-local hostname, address, or no mDNSResponder running on that machine\n");
+
+ if (NumAnswers)
+ {
+ // Because of the way we use lastsrc in ServicesCallback, we need to clear the cache to make sure we're getting fresh answers
+ mDNS *const m = &mDNSStorage;
+ mDNSu32 slot;
+ CacheGroup *cg;
+ CacheRecord *rr;
+ FORALL_CACHERECORDS(slot, cg, rr)
+ {
+ mDNS_PurgeCacheResourceRecord(m, rr);
+ }
+ if (target.type == 0) target = hostaddr; // Make sure the services query is targeted
+ DoQuery(&q, "_services._dns-sd._udp.local.", kDNSType_PTR, &target, ServicesCallback);
+ if (StopNow == 2) break;
+ }
+ }
+
+ mDNS_Close(&mDNSStorage);
+ return(0);
usage:
- fprintf(stderr, "%s <dot-local hostname> or <IPv4 address> or <IPv6 address> ...\n", progname);
- return(-1);
- }
+ fprintf(stderr, "Usage: %s <dot-local hostname> or <IPv4 address> or <IPv6 address> ...\n", progname);
+ return(-1);
+}
projects / apple / mdnsresponder.git / blobdiff