1 /* 2 * Copyright (c) 2003-2019 Apple Inc. All rights reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdio.h> 18 19 #if defined(WIN32) || defined(EFI32) || defined(EFI64) || defined(EFIX64) 20 // Need to add Windows/EFI syslog support here 21 #define LOG_PID 0x01 22 #define LOG_CONS 0x02 23 #define LOG_PERROR 0x20 24 #else 25 #include <syslog.h> 26 #endif 27 28 #include "mDNSEmbeddedAPI.h" 29 30 mDNSexport int mDNS_LoggingEnabled = 0; 31 mDNSexport int mDNS_PacketLoggingEnabled = 0; 32 mDNSexport int mDNS_McastLoggingEnabled = 0; 33 mDNSexport int mDNS_McastTracingEnabled = 0; 34 35 #if MDNS_DEBUGMSGS 36 mDNSexport int mDNS_DebugMode = mDNStrue; 37 #else 38 mDNSexport int mDNS_DebugMode = mDNSfalse; 39 #endif 40 41 // Note, this uses mDNS_vsnprintf instead of standard "vsnprintf", because mDNS_vsnprintf knows 42 // how to print special data types like IP addresses and length-prefixed domain names 43 #if MDNS_DEBUGMSGS > 1 44 mDNSexport void verbosedebugf_(const char *format, ...) 45 { 46 char buffer[512]; 47 va_list args; 48 va_start(args, format); 49 buffer[mDNS_vsnprintf(buffer, sizeof(buffer), format, args)] = 0; 50 va_end(args); 51 mDNSPlatformWriteDebugMsg(buffer); 52 } 53 #endif 54 55 // Log message with default "mDNSResponder" ident string at the start 56 #if MDNSRESPONDER_SUPPORTS(APPLE, OS_LOG) 57 mDNSlocal void LogMsgWithLevelv(os_log_t category, os_log_type_t level, const char *format, va_list args) 58 { 59 char buffer[512]; 60 mDNS_vsnprintf(buffer, (mDNSu32)sizeof(buffer), format, args); 61 os_log_with_type(category ? category : mDNSLogCategory_Default, level, "%{private}s", buffer); 62 } 63 #else 64 mDNSlocal void LogMsgWithLevelv(const char *category, mDNSLogLevel_t level, const char *format, va_list args) 65 { 66 char buffer[512]; 67 char *dst = buffer; 68 const char *const lim = &buffer[512]; 69 if (category) mDNS_snprintf_add(&dst, lim, "%s: ", category); 70 mDNS_vsnprintf(dst, (mDNSu32)(lim - dst), format, args); 71 mDNSPlatformWriteLogMsg(ProgramName, buffer, level); 72 } 73 #endif 74 75 #define LOG_HELPER_BODY(CATEGORY, LEVEL) \ 76 { \ 77 va_list args; \ 78 va_start(args,format); \ 79 LogMsgWithLevelv(CATEGORY, LEVEL, format, args); \ 80 va_end(args); \ 81 } 82 83 // see mDNSDebug.h 84 #if !MDNS_HAS_VA_ARG_MACROS 85 void LogMsg_(const char *format, ...) LOG_HELPER_BODY(NULL, MDNS_LOG_INFO) 86 void LogOperation_(const char *format, ...) LOG_HELPER_BODY(NULL, MDNS_LOG_INFO) 87 void LogSPS_(const char *format, ...) LOG_HELPER_BODY(NULL, MDNS_LOG_INFO) 88 void LogInfo_(const char *format, ...) LOG_HELPER_BODY(NULL, MDNS_LOG_INFO) 89 void LogDebug_(const char *format, ...) LOG_HELPER_BODY(NULL, MDNS_LOG_DEBUG) 90 #endif 91 92 #if MDNS_DEBUGMSGS 93 void debugf_(const char *format, ...) LOG_HELPER_BODY(MDNS_LOG_DEBUG) 94 #endif 95 96 // Log message with default "mDNSResponder" ident string at the start 97 mDNSexport void LogMsgWithLevel(mDNSLogCategory_t category, mDNSLogLevel_t level, const char *format, ...) 98 LOG_HELPER_BODY(category, level) 99 100 mDNSexport void LogToFD(int fd, const char *format, ...) 101 { 102 va_list args; 103 va_start(args, format); 104 #if APPLE_OSX_mDNSResponder 105 char buffer[1024]; 106 buffer[mDNS_vsnprintf(buffer, (mDNSu32)sizeof(buffer), format, args)] = '\0'; 107 dprintf(fd, "%s\n", buffer); 108 #else 109 (void)fd; 110 LogMsgWithLevelv(NULL, MDNS_LOG_INFO, format, args); 111 #endif 112 va_end(args); 113 } 114