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 18 #ifndef __mDNSDebug_h 19 #define __mDNSDebug_h 20 21 // Set MDNS_DEBUGMSGS to 0 to optimize debugf() calls out of the compiled code 22 // Set MDNS_DEBUGMSGS to 1 to generate normal debugging messages 23 // Set MDNS_DEBUGMSGS to 2 to generate verbose debugging messages 24 // MDNS_DEBUGMSGS is normally set in the project options (or makefile) but can also be set here if desired 25 // (If you edit the file here to turn on MDNS_DEBUGMSGS while you're debugging some code, be careful 26 // not to accidentally check-in that change by mistake when you check in your other changes.) 27 28 //#undef MDNS_DEBUGMSGS 29 //#define MDNS_DEBUGMSGS 2 30 31 // Set MDNS_CHECK_PRINTF_STYLE_FUNCTIONS to 1 to enable extra GCC compiler warnings 32 // Note: You don't normally want to do this, because it generates a bunch of 33 // spurious warnings for the following custom extensions implemented by mDNS_vsnprintf: 34 // warning: `#' flag used with `%s' printf format (for %#s -- pascal string format) 35 // warning: repeated `#' flag in format (for %##s -- DNS name string format) 36 // warning: double format, pointer arg (arg 2) (for %.4a, %.16a, %#a -- IP address formats) 37 #define MDNS_CHECK_PRINTF_STYLE_FUNCTIONS 0 38 39 typedef enum 40 { 41 MDNS_LOG_MSG, 42 MDNS_LOG_OPERATION, 43 MDNS_LOG_SPS, 44 MDNS_LOG_INFO, 45 MDNS_LOG_DEBUG, 46 } mDNSLogLevel_t; 47 48 // Set this symbol to 1 to answer remote queries for our Address, reverse mapping PTR, and HINFO records 49 #define ANSWER_REMOTE_HOSTNAME_QUERIES 0 50 51 // Set this symbol to 1 to do extra debug checks on malloc() and free() 52 // Set this symbol to 2 to write a log message for every malloc() and free() 53 //#define MACOSX_MDNS_MALLOC_DEBUGGING 1 54 55 //#define ForceAlerts 1 56 //#define LogTimeStamps 1 57 58 // Developer-settings section ends here 59 60 #if MDNS_CHECK_PRINTF_STYLE_FUNCTIONS 61 #define IS_A_PRINTF_STYLE_FUNCTION(F,A) __attribute__ ((format(printf,F,A))) 62 #else 63 #define IS_A_PRINTF_STYLE_FUNCTION(F,A) 64 #endif 65 66 #ifdef __cplusplus 67 extern "C" { 68 #endif 69 70 // Variable argument macro support. Use ANSI C99 __VA_ARGS__ where possible. Otherwise, use the next best thing. 71 72 #if (defined(__GNUC__)) 73 #if ((__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 2))) 74 #define MDNS_C99_VA_ARGS 1 75 #define MDNS_GNU_VA_ARGS 0 76 #else 77 #define MDNS_C99_VA_ARGS 0 78 #define MDNS_GNU_VA_ARGS 1 79 #endif 80 #define MDNS_HAS_VA_ARG_MACROS 1 81 #elif (_MSC_VER >= 1400) // Visual Studio 2005 and later 82 #define MDNS_C99_VA_ARGS 1 83 #define MDNS_GNU_VA_ARGS 0 84 #define MDNS_HAS_VA_ARG_MACROS 1 85 #elif (defined(__MWERKS__)) 86 #define MDNS_C99_VA_ARGS 1 87 #define MDNS_GNU_VA_ARGS 0 88 #define MDNS_HAS_VA_ARG_MACROS 1 89 #else 90 #define MDNS_C99_VA_ARGS 0 91 #define MDNS_GNU_VA_ARGS 0 92 #define MDNS_HAS_VA_ARG_MACROS 0 93 #endif 94 95 #if (MDNS_HAS_VA_ARG_MACROS) 96 #if (MDNS_C99_VA_ARGS) 97 #define debug_noop( ... ) ((void)0) 98 #define LogMsg( ... ) LogMsgWithLevel(MDNS_LOG_MSG, __VA_ARGS__) 99 #define LogOperation( ... ) do { if (mDNS_LoggingEnabled) LogMsgWithLevel(MDNS_LOG_OPERATION, __VA_ARGS__); } while (0) 100 #define LogSPS( ... ) do { if (mDNS_LoggingEnabled) LogMsgWithLevel(MDNS_LOG_SPS, __VA_ARGS__); } while (0) 101 #define LogInfo( ... ) do { if (mDNS_LoggingEnabled) LogMsgWithLevel(MDNS_LOG_INFO, __VA_ARGS__); } while (0) 102 #elif (MDNS_GNU_VA_ARGS) 103 #define debug_noop( ARGS... ) ((void)0) 104 #define LogMsg( ARGS... ) LogMsgWithLevel(MDNS_LOG_MSG, ARGS) 105 #define LogOperation( ARGS... ) do { if (mDNS_LoggingEnabled) LogMsgWithLevel(MDNS_LOG_OPERATION, ARGS); } while (0) 106 #define LogSPS( ARGS... ) do { if (mDNS_LoggingEnabled) LogMsgWithLevel(MDNS_LOG_SPS, ARGS); } while (0) 107 #define LogInfo( ARGS... ) do { if (mDNS_LoggingEnabled) LogMsgWithLevel(MDNS_LOG_INFO, ARGS); } while (0) 108 #else 109 #error Unknown variadic macros 110 #endif 111 #else 112 // If your platform does not support variadic macros, you need to define the following variadic functions. 113 // See mDNSShared/mDNSDebug.c for sample implementation 114 #define debug_noop 1 ? (void)0 : (void) 115 #define LogMsg LogMsg_ 116 #define LogOperation (mDNS_LoggingEnabled == 0) ? ((void)0) : LogOperation_ 117 #define LogSPS (mDNS_LoggingEnabled == 0) ? ((void)0) : LogSPS_ 118 #define LogInfo (mDNS_LoggingEnabled == 0) ? ((void)0) : LogInfo_ 119 extern void LogMsg_(const char *format, ...) IS_A_PRINTF_STYLE_FUNCTION(1,2); 120 extern void LogOperation_(const char *format, ...) IS_A_PRINTF_STYLE_FUNCTION(1,2); 121 extern void LogSPS_(const char *format, ...) IS_A_PRINTF_STYLE_FUNCTION(1,2); 122 extern void LogInfo_(const char *format, ...) IS_A_PRINTF_STYLE_FUNCTION(1,2); 123 #endif 124 125 #if MDNS_DEBUGMSGS 126 #define debugf debugf_ 127 extern void debugf_(const char *format, ...) IS_A_PRINTF_STYLE_FUNCTION(1,2); 128 #else 129 #define debugf debug_noop 130 #endif 131 132 #if MDNS_DEBUGMSGS > 1 133 #define verbosedebugf verbosedebugf_ 134 extern void verbosedebugf_(const char *format, ...) IS_A_PRINTF_STYLE_FUNCTION(1,2); 135 #else 136 #define verbosedebugf debug_noop 137 #endif 138 139 extern int mDNS_LoggingEnabled; 140 extern int mDNS_PacketLoggingEnabled; 141 extern int mDNS_DebugMode; // If non-zero, LogMsg() writes to stderr instead of syslog 142 extern const char ProgramName[]; 143 144 extern void LogMsgWithLevel(mDNSLogLevel_t logLevel, const char *format, ...) IS_A_PRINTF_STYLE_FUNCTION(2,3); 145 // LogMsgNoIdent needs to be fixed so that it logs without the ident prefix like it used to 146 // (or completely overhauled to use the new "log to a separate file" facility) 147 #define LogMsgNoIdent LogMsg 148 149 #if APPLE_OSX_mDNSResponder && MACOSX_MDNS_MALLOC_DEBUGGING >= 1 150 extern void *mallocL(char *msg, unsigned int size); 151 extern void freeL(char *msg, void *x); 152 extern void LogMemCorruption(const char *format, ...); 153 extern void uds_validatelists(void); 154 extern void udns_validatelists(void *const v); 155 #else 156 #define mallocL(X,Y) malloc(Y) 157 #define freeL(X,Y) free(Y) 158 #endif 159 160 #ifdef __cplusplus 161 } 162 #endif 163 164 #endif 165