mDNSMacOS9/Mac OS Test Responder.c

   1 /*
   2  * Copyright (c) 2002-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22
  23     Change History (most recent first):
  24
  25 $Log: Mac\040OS\040Test\040Responder.c,v $
  26 Revision 1.17  2003/08/14 02:19:54  cheshire
  27 <rdar://problem/3375491> Split generic ResourceRecord type into two separate types: AuthRecord and CacheRecord
  28
  29 Revision 1.16  2003/08/12 19:56:24  cheshire
  30 Update to APSL 2.0
  31
  32  */
  33
  34 #include <stdio.h>                                              // For printf()
  35 #include <string.h>                     // For strlen() etc.
  36
  37 #include <Events.h>                                             // For WaitNextEvent()
  38 #include <SIOUX.h>                                              // For SIOUXHandleOneEvent()
  39
  40 #include "mDNSClientAPI.h"                              // Defines the interface to the client layer above
  41
  42 #include "mDNSMacOS9.h"                                 // Defines the specific types needed to run mDNS on this platform
  43
  44 // These don't have to be globals, but their memory does need to remain valid for as
  45 // long as the search is going on. They are declared as globals here for simplicity.
  46 static mDNS m;
  47 static mDNS_PlatformSupport p;
  48 static ServiceRecordSet p1, p2, afp, http, njp;
  49 static AuthRecord browsedomain;
  50
  51 // This sample code just calls mDNS_RenameAndReregisterService to automatically pick a new
  52 // unique name for the service. For a device such as a printer, this may be appropriate.
  53 // For a device with a user interface, and a screen, and a keyboard, the appropriate
  54 // response may be to prompt the user and ask them to choose a new name for the service.
  55 mDNSlocal void Callback(mDNS *const m, ServiceRecordSet *const sr, mStatus result)
  56         {
  57         switch (result)
  58                 {
  59                 case mStatus_NoError:      debugf("Callback: %##s Name Registered",   sr->RR_SRV.resrec.name.c); break;
  60                 case mStatus_NameConflict: debugf("Callback: %##s Name Conflict",     sr->RR_SRV.resrec.name.c); break;
  61                 case mStatus_MemFree:      debugf("Callback: %##s Memory Free",       sr->RR_SRV.resrec.name.c); break;
  62                 default:                   debugf("Callback: %##s Unknown Result %d", sr->RR_SRV.resrec.name.c, result); break;
  63                 }
  64
  65         if (result == mStatus_NameConflict) mDNS_RenameAndReregisterService(m, sr, mDNSNULL);
  66         }
  67
  68 // RegisterService() is a simple wrapper function which takes C string
  69 // parameters, converts them to domainname parameters, and calls mDNS_RegisterService()
  70 mDNSlocal void RegisterService(mDNS *m, ServiceRecordSet *recordset,
  71         UInt16 PortAsNumber, const char txtinfo[],
  72         const domainlabel *const n, const char type[], const char domain[])
  73         {
  74         mDNSIPPort port;
  75         domainname t;
  76         domainname d;
  77         char buffer[512];
  78         UInt8 txtbuffer[512];
  79
  80         port.b[0] = (UInt8)(PortAsNumber >> 8);
  81         port.b[1] = (UInt8)(PortAsNumber     );
  82         MakeDomainNameFromDNSNameString(&t, type);
  83         MakeDomainNameFromDNSNameString(&d, domain);
  84
  85         if (txtinfo)
  86                 {
  87                 strncpy((char*)txtbuffer+1, txtinfo, sizeof(txtbuffer)-1);
  88                 txtbuffer[0] = (UInt8)strlen(txtinfo);
  89                 }
  90         else
  91                 txtbuffer[0] = 0;
  92
  93         mDNS_RegisterService(m, recordset,
  94                 n, &t, &d,                                                                      // Name, type, domain
  95                 mDNSNULL, port,                                                         // Host and port
  96                 txtbuffer, (mDNSu16)(1+txtbuffer[0]),           // TXT data, length
  97                 mDNSNULL, 0,                                                            // Subtypes (none)
  98                 mDNSInterface_Any,                                                      // Interace ID
  99                 Callback, mDNSNULL);                                            // Callback and context
 100
 101         ConvertDomainNameToCString(&recordset->RR_SRV.resrec.name, buffer);
 102         printf("Made Service Records for %s\n", buffer);
 103         }
 104
 105 // RegisterFakeServiceForTesting() simulates the effect of services being registered on
 106 // dynamically-allocated port numbers. No real service exists on that port -- this is just for testing.
 107 mDNSlocal void RegisterFakeServiceForTesting(mDNS *m, ServiceRecordSet *recordset, const char txtinfo[],
 108         const char name[], const char type[], const char domain[])
 109         {
 110         static UInt16 NextPort = 0xF000;
 111         domainlabel n;
 112         MakeDomainLabelFromLiteralString(&n, name);
 113         RegisterService(m, recordset, NextPort++, txtinfo, &n, type, domain);
 114         }
 115
 116 // CreateProxyRegistrationForRealService() checks to see if the given port is currently
 117 // in use, and if so, advertises the specified service as present on that port.
 118 // This is useful for advertising existing real services (Personal Web Sharing, Personal
 119 // File Sharing, etc.) that currently don't register with mDNS Service Discovery themselves.
 120 mDNSlocal OSStatus CreateProxyRegistrationForRealService(mDNS *m, UInt16 PortAsNumber, const char txtinfo[],
 121         const char *servicetype, ServiceRecordSet *recordset)
 122         {
 123         mDNSIPPort port;
 124         InetAddress ia;
 125         TBind bindReq;
 126         OSStatus err;
 127         TEndpointInfo endpointinfo;
 128         EndpointRef ep = OTOpenEndpoint(OTCreateConfiguration(kTCPName), 0, &endpointinfo, &err);
 129         if (!ep || err) { printf("OTOpenEndpoint (CreateProxyRegistrationForRealService) failed %d", err); return(err); }
 130
 131         port.b[0] = (UInt8)(PortAsNumber >> 8);
 132         port.b[1] = (UInt8)(PortAsNumber     );
 133         ia.fAddressType = AF_INET;
 134         ia.fPort        = port.NotAnInteger;
 135         ia.fHost        = 0;
 136         bindReq.addr.maxlen = sizeof(ia);
 137         bindReq.addr.len    = sizeof(ia);
 138         bindReq.addr.buf    = (UInt8*)&ia;
 139         bindReq.qlen        = 0;
 140         err = OTBind(ep, &bindReq, NULL);
 141
 142         if (err == kOTBadAddressErr)
 143                 RegisterService(m, recordset, PortAsNumber, txtinfo, &m->nicelabel, servicetype, "local.");
 144         else if (err)
 145                 debugf("OTBind failed %d", err);
 146
 147         OTCloseProvider(ep);
 148         return(noErr);
 149         }
 150
 151 // Done once on startup, and then again every time our address changes
 152 mDNSlocal OSStatus mDNSResponderTestSetup(mDNS *m)
 153         {
 154         char buffer[256];
 155         mDNSv4Addr ip = m->HostInterfaces->ip.ip.v4;
 156
 157         ConvertDomainNameToCString(&m->hostname, buffer);
 158         printf("Name %s\n", buffer);
 159         printf("IP   %d.%d.%d.%d\n", ip.b[0], ip.b[1], ip.b[2], ip.b[3]);
 160
 161         printf("\n");
 162         printf("Registering Service Records\n");
 163         // Create example printer discovery records
 164         //static ServiceRecordSet p1, p2;
 165
 166 #define SRSET 0
 167 #if SRSET==0
 168         RegisterFakeServiceForTesting(m, &p1, "path=/index.html", "Web Server One", "_http._tcp.", "local.");
 169         RegisterFakeServiceForTesting(m, &p2, "path=/path.html",  "Web Server Two", "_http._tcp.", "local.");
 170 #elif SRSET==1
 171         RegisterFakeServiceForTesting(m, &p1, "rn=lpq1", "Epson Stylus 900N", "_printer._tcp.", "local.");
 172         RegisterFakeServiceForTesting(m, &p2, "rn=lpq2", "HP LaserJet",       "_printer._tcp.", "local.");
 173 #else
 174         RegisterFakeServiceForTesting(m, &p1, "rn=lpq3", "My Printer",        "_printer._tcp.", "local.");
 175         RegisterFakeServiceForTesting(m, &p2, "lrn=pq4", "My Other Printer",  "_printer._tcp.", "local.");
 176 #endif
 177
 178         // If AFP Server is running, register a record for it
 179         CreateProxyRegistrationForRealService(m, 548, "", "_afpovertcp._tcp.", &afp);
 180
 181         // If Web Server is running, register a record for it
 182         CreateProxyRegistrationForRealService(m, 80, "", "_http._tcp.", &http);
 183
 184         // And pretend we always have an NJP server running on port 80 too
 185         //RegisterService(m, &njp, 80, "NJP/", &m->nicelabel, "_njp._tcp.", "local.");
 186
 187         // Advertise that apple.com. is available for browsing
 188         mDNS_AdvertiseDomains(m, &browsedomain, mDNS_DomainTypeBrowse, mDNSInterface_Any, "IL 2\\4th Floor.apple.com.");
 189
 190         return(kOTNoError);
 191         }
 192
 193 // YieldSomeTime() just cooperatively yields some time to other processes running on classic Mac OS
 194 mDNSlocal Boolean YieldSomeTime(UInt32 milliseconds)
 195         {
 196         extern Boolean SIOUXQuitting;
 197         EventRecord e;
 198         WaitNextEvent(everyEvent, &e, milliseconds / 17, NULL);
 199         SIOUXHandleOneEvent(&e);
 200         return(SIOUXQuitting);
 201         }
 202
 203 int main()
 204         {
 205         extern void mDNSPlatformIdle(mDNS *const m);    // Only needed for debugging version
 206         mStatus err;
 207         Boolean DoneSetup = false;
 208
 209         SIOUXSettings.asktosaveonclose = false;
 210         SIOUXSettings.userwindowtitle = "\pMulticast DNS Responder";
 211
 212         printf("Prototype Multicast DNS Responder\n\n");
 213         printf("WARNING! This is experimental software.\n\n");
 214         printf("Multicast DNS is currently an experimental protocol.\n\n");
 215         printf("This software reports errors using MacsBug breaks,\n");
 216         printf("so if you don't have MacsBug installed your Mac may crash.\n\n");
 217         printf("******************************************************************************\n");
 218
 219         err = InitOpenTransport();
 220         if (err) { debugf("InitOpenTransport failed %d", err); return(err); }
 221
 222         err = mDNS_Init(&m, &p, mDNS_Init_NoCache, mDNS_Init_ZeroCacheSize,
 223                 mDNS_Init_AdvertiseLocalAddresses, mDNS_Init_NoInitCallback, mDNS_Init_NoInitCallbackContext);
 224         if (err) return(err);
 225
 226         while (!YieldSomeTime(35))
 227                 {
 228                 // For debugging, use "#define __ONLYSYSTEMTASK__ 1" and call mDNSPlatformIdle() periodically.
 229                 // For shipping code, don't define __ONLYSYSTEMTASK__, and you don't need to call mDNSPlatformIdle()
 230                 mDNSPlatformIdle(&m);   // Only needed for debugging version
 231                 if (m.mDNSPlatformStatus == mStatus_NoError && !DoneSetup)
 232                         {
 233                         DoneSetup = true;
 234                         printf("\nListening for mDNS queries...\n");
 235                         mDNSResponderTestSetup(&m);
 236                         }
 237                 }
 238
 239         if (p1.RR_SRV.resrec.RecordType  ) mDNS_DeregisterService(&m, &p1);
 240         if (p2.RR_SRV.resrec.RecordType  ) mDNS_DeregisterService(&m, &p2);
 241         if (afp.RR_SRV.resrec.RecordType ) mDNS_DeregisterService(&m, &afp);
 242         if (http.RR_SRV.resrec.RecordType) mDNS_DeregisterService(&m, &http);
 243         if (njp.RR_SRV.resrec.RecordType ) mDNS_DeregisterService(&m, &njp);
 244
 245         mDNS_Close(&m);
 246
 247         return(0);
 248         }