mDNSShared/mDNSDebug.c

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2003-2018 Apple 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 #include "mDNSDebug.h"
  19
  20 #include <stdio.h>
  21
  22 #if defined(WIN32) || defined(EFI32) || defined(EFI64) || defined(EFIX64)
  23 // Need to add Windows/EFI syslog support here
  24 #define LOG_PID 0x01
  25 #define LOG_CONS 0x02
  26 #define LOG_PERROR 0x20
  27 #else
  28 #include <syslog.h>
  29 #endif
  30
  31 #include "mDNSEmbeddedAPI.h"
  32
  33 mDNSexport int mDNS_LoggingEnabled       = 0;
  34 mDNSexport int mDNS_PacketLoggingEnabled = 0;
  35 mDNSexport int mDNS_McastLoggingEnabled  = 0;
  36 mDNSexport int mDNS_McastTracingEnabled  = 0;
  37
  38 #if MDNS_DEBUGMSGS
  39 mDNSexport int mDNS_DebugMode = mDNStrue;
  40 #else
  41 mDNSexport int mDNS_DebugMode = mDNSfalse;
  42 #endif
  43
  44 // Note, this uses mDNS_vsnprintf instead of standard "vsnprintf", because mDNS_vsnprintf knows
  45 // how to print special data types like IP addresses and length-prefixed domain names
  46 #if MDNS_DEBUGMSGS > 1
  47 mDNSexport void verbosedebugf_(const char *format, ...)
  48 {
  49     char buffer[512];
  50     va_list ptr;
  51     va_start(ptr,format);
  52     buffer[mDNS_vsnprintf(buffer, sizeof(buffer), format, ptr)] = 0;
  53     va_end(ptr);
  54     mDNSPlatformWriteDebugMsg(buffer);
  55 }
  56 #endif
  57
  58 // Log message with default "mDNSResponder" ident string at the start
  59 mDNSlocal void LogMsgWithLevelv(mDNSLogLevel_t logLevel, const char *format, va_list ptr)
  60 {
  61     char buffer[512];
  62     buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
  63     mDNSPlatformWriteLogMsg(ProgramName, buffer, logLevel);
  64 }
  65
  66 #define LOG_HELPER_BODY(L) \
  67     { \
  68         va_list ptr; \
  69         va_start(ptr,format); \
  70         LogMsgWithLevelv(L, format, ptr); \
  71         va_end(ptr); \
  72     }
  73
  74 // see mDNSDebug.h
  75 #if !MDNS_HAS_VA_ARG_MACROS
  76 void LogMsg_(const char *format, ...)       LOG_HELPER_BODY(MDNS_LOG_MSG)
  77 void LogOperation_(const char *format, ...) LOG_HELPER_BODY(MDNS_LOG_OPERATION)
  78 void LogSPS_(const char *format, ...)       LOG_HELPER_BODY(MDNS_LOG_SPS)
  79 void LogInfo_(const char *format, ...)      LOG_HELPER_BODY(MDNS_LOG_INFO)
  80 void LogDebug_(const char *format, ...)     LOG_HELPER_BODY(MDNS_LOG_DEBUG)
  81 #endif
  82
  83 #if MDNS_DEBUGMSGS
  84 void debugf_(const char *format, ...)       LOG_HELPER_BODY(MDNS_LOG_DEBUG)
  85 #endif
  86
  87 // Log message with default "mDNSResponder" ident string at the start
  88 mDNSexport void LogMsgWithLevel(mDNSLogLevel_t logLevel, const char *format, ...)
  89 LOG_HELPER_BODY(logLevel)