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/* -*- Mode: C; tab-width: 4 -*-
*
* Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
File: mDNSDebug.c
Contains: Implementation of debugging utilities. Requires a POSIX environment.
Version: 1.0
Change History (most recent first):
$Log: mDNSDebug.c,v $
Revision 1.7 2006/08/14 23:24:56 cheshire
Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0
Revision 1.6 2005/01/27 22:57:56 cheshire
Fix compile errors on gcc4
Revision 1.5 2004/09/17 01:08:55 cheshire
Renamed mDNSClientAPI.h to mDNSEmbeddedAPI.h
The name "mDNSClientAPI.h" is misleading to new developers looking at this code. The interfaces
declared in that file are ONLY appropriate to single-address-space embedded applications.
For clients on general-purpose computers, the interfaces defined in dns_sd.h should be used.
Revision 1.4 2004/06/11 22:36:51 cheshire
Fixes for compatibility with Windows
Revision 1.3 2004/01/28 21:14:23 cheshire
Reconcile debug_mode and gDebugLogging into a single flag (mDNS_DebugMode)
Revision 1.2 2003/12/09 01:30:40 rpantos
Fix usage of ARGS... macros to build properly on Windows.
Revision 1.1 2003/12/08 21:11:42; rpantos
Changes necessary to support mDNSResponder on Linux.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "mDNSDebug.h"
#include <stdio.h>
#if defined(WIN32)
// Need to add Windows syslog support here
#define LOG_PID 0x01
#define LOG_CONS 0x02
#define LOG_PERROR 0x20
#define openlog(A,B,C) (void)(A); (void)(B)
#define syslog(A,B,C)
#define closelog()
#else
#include <syslog.h>
#endif
#include "mDNSEmbeddedAPI.h"
#if MDNS_DEBUGMSGS
mDNSexport int mDNS_DebugMode = mDNStrue;
#else
mDNSexport int mDNS_DebugMode = mDNSfalse;
#endif
// Note, this uses mDNS_vsnprintf instead of standard "vsnprintf", because mDNS_vsnprintf knows
// how to print special data types like IP addresses and length-prefixed domain names
#if MDNS_DEBUGMSGS
mDNSexport void debugf_(const char *format, ...)
{
unsigned char buffer[512];
va_list ptr;
va_start(ptr,format);
buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
va_end(ptr);
fprintf(stderr,"%s\n", buffer);
fflush(stderr);
}
#endif
#if MDNS_DEBUGMSGS > 1
mDNSexport void verbosedebugf_(const char *format, ...)
{
unsigned char buffer[512];
va_list ptr;
va_start(ptr,format);
buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
va_end(ptr);
fprintf(stderr,"%s\n", buffer);
fflush(stderr);
}
#endif
mDNSlocal void WriteLogMsg(const char *ident, const char *buffer, int logoptflags, int logpriority)
{
if (mDNS_DebugMode) // In debug mode we write to stderr
{
fprintf(stderr,"%s\n", buffer);
fflush(stderr);
}
else // else, in production mode, we write to syslog
{
openlog(ident, LOG_PERROR | logoptflags, LOG_DAEMON);
syslog(logpriority, "%s", buffer);
closelog();
}
}
// Log message with default "mDNSResponder" ident string at the start
mDNSexport void LogMsg(const char *format, ...)
{
char buffer[512];
va_list ptr;
va_start(ptr,format);
buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
va_end(ptr);
WriteLogMsg("mDNSResponder", buffer, 0, LOG_ERR);
}
// Log message with specified ident string at the start
mDNSexport void LogMsgIdent(const char *ident, const char *format, ...)
{
char buffer[512];
va_list ptr;
va_start(ptr,format);
buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
va_end(ptr);
WriteLogMsg(ident, buffer, ident && *ident ? LOG_PID : 0, LOG_INFO);
}
// Log message with no ident string at the start
mDNSexport void LogMsgNoIdent(const char *format, ...)
{
char buffer[512];
va_list ptr;
va_start(ptr,format);
buffer[mDNS_vsnprintf((char *)buffer, sizeof(buffer), format, ptr)] = 0;
va_end(ptr);
WriteLogMsg("", buffer, 0, LOG_INFO);
}
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