mDNSShared/mDNSDebug.c

   1 /*
   2  * Copyright (c) 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         File:           mDNSDebug.c
  24
  25         Contains:       Implementation of debugging utilities. Requires a POSIX environment.
  26
  27         Version:        1.0
  28
  29     Change History (most recent first):
  30
  31 $Log: mDNSDebug.c,v $
  32 Revision 1.6  2005/01/27 22:57:56  cheshire
  33 Fix compile errors on gcc4
  34
  35 Revision 1.5  2004/09/17 01:08:55  cheshire
  36 Renamed mDNSClientAPI.h to mDNSEmbeddedAPI.h
  37   The name "mDNSClientAPI.h" is misleading to new developers looking at this code. The interfaces
  38   declared in that file are ONLY appropriate to single-address-space embedded applications.
  39   For clients on general-purpose computers, the interfaces defined in dns_sd.h should be used.
  40
  41 Revision 1.4  2004/06/11 22:36:51  cheshire
  42 Fixes for compatibility with Windows
  43
  44 Revision 1.3  2004/01/28 21:14:23  cheshire
  45 Reconcile debug_mode and gDebugLogging into a single flag (mDNS_DebugMode)
  46
  47 Revision 1.2  2003/12/09 01:30:40  rpantos
  48 Fix usage of ARGS... macros to build properly on Windows.
  49
  50 Revision 1.1  2003/12/08 21:11:42;  rpantos
  51 Changes necessary to support mDNSResponder on Linux.
  52
  53 */
  54
  55 #include "mDNSDebug.h"
  56
  57 #include <stdio.h>
  58
  59 #if defined(WIN32)
  60 // Need to add Windows syslog support here
  61 #define LOG_PID 0x01
  62 #define LOG_CONS 0x02
  63 #define LOG_PERROR 0x20
  64 #define openlog(A,B,C) (void)(A); (void)(B)
  65 #define syslog(A,B,C)
  66 #define closelog()
  67 #else
  68 #include <syslog.h>
  69 #endif
  70
  71 #include "mDNSEmbeddedAPI.h"
  72
  73 #if MDNS_DEBUGMSGS
  74 mDNSexport int mDNS_DebugMode = mDNStrue;
  75 #else
  76 mDNSexport int mDNS_DebugMode = mDNSfalse;
  77 #endif
  78
  79 // Note, this uses mDNS_vsnprintf instead of standard "vsnprintf", because mDNS_vsnprintf knows
  80 // how to print special data types like IP addresses and length-prefixed domain names
  81 #if MDNS_DEBUGMSGS
  82 mDNSexport void debugf_(const char *format, ...)
  83         {
  84         unsigned char buffer[512];
  85         va_list ptr;
  86         va_start(ptr,format);
  87         buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
  88         va_end(ptr);
  89         fprintf(stderr,"%s\n", buffer);
  90         fflush(stderr);
  91         }
  92 #endif
  93
  94 #if MDNS_DEBUGMSGS > 1
  95 mDNSexport void verbosedebugf_(const char *format, ...)
  96         {
  97         unsigned char buffer[512];
  98         va_list ptr;
  99         va_start(ptr,format);
 100         buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
 101         va_end(ptr);
 102         fprintf(stderr,"%s\n", buffer);
 103         fflush(stderr);
 104         }
 105 #endif
 106
 107 mDNSlocal void WriteLogMsg(const char *ident, const char *buffer, int logoptflags)
 108         {
 109         if (mDNS_DebugMode)     // In debug mode we write to stderr
 110                 {
 111                 fprintf(stderr,"%s\n", buffer);
 112                 fflush(stderr);
 113                 }
 114         else                            // else, in production mode, we write to syslog
 115                 {
 116                 openlog(ident, LOG_CONS | LOG_PERROR | logoptflags, LOG_DAEMON);
 117                 syslog(LOG_ERR, "%s", buffer);
 118                 closelog();
 119                 }
 120         }
 121
 122 // Log message with default "mDNSResponder" ident string at the start
 123 mDNSexport void LogMsg(const char *format, ...)
 124         {
 125         char buffer[512];
 126         va_list ptr;
 127         va_start(ptr,format);
 128         buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
 129         va_end(ptr);
 130         WriteLogMsg("mDNSResponder", buffer, 0);
 131         }
 132
 133 // Log message with specified ident string at the start
 134 mDNSexport void LogMsgIdent(const char *ident, const char *format, ...)
 135         {
 136         char buffer[512];
 137         va_list ptr;
 138         va_start(ptr,format);
 139         buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
 140         va_end(ptr);
 141         WriteLogMsg(ident, buffer, ident && *ident ? LOG_PID : 0);
 142         }
 143
 144 // Log message with no ident string at the start
 145 mDNSexport void LogMsgNoIdent(const char *format, ...)
 146         {
 147         char buffer[512];
 148         va_list ptr;
 149         va_start(ptr,format);
 150         buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
 151         va_end(ptr);
 152         WriteLogMsg("", buffer, 0);
 153         }