/*
* util/log.c - implementation of the log code
*
* Copyright (c) 2007, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
* Implementation of log.h.
*/
#include "config.h"
#include "util/log.h"
#include "util/locks.h"
#include "ldns/sbuffer.h"
#include <stdarg.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_SYSLOG_H
# include <syslog.h>
#else
/**define LOG_ constants */
# define LOG_CRIT 2
# define LOG_ERR 3
# define LOG_WARNING 4
# define LOG_NOTICE 5
# define LOG_INFO 6
# define LOG_DEBUG 7
#endif
#ifdef UB_ON_WINDOWS
# include "winrc/win_svc.h"
#endif
/* default verbosity */
enum verbosity_value verbosity = 0;
/** the file logged to. */
static FILE* logfile = 0;
/** if key has been created */
static int key_created = 0;
/** pthread key for thread ids in logfile */
static ub_thread_key_t logkey;
#ifndef THREADS_DISABLED
/** pthread mutex to protect FILE* */
static lock_quick_t log_lock;
#endif
/** the identity of this executable/process */
static const char* ident="unbound";
#if defined(HAVE_SYSLOG_H) || defined(UB_ON_WINDOWS)
/** are we using syslog(3) to log to */
static int logging_to_syslog = 0;
#endif /* HAVE_SYSLOG_H */
/** time to print in log, if NULL, use time(2) */
static time_t* log_now = NULL;
/** print time in UTC or in secondsfrom1970 */
static int log_time_asc = 0;
void
log_init(const char* filename, int use_syslog, const char* chrootdir)
{
FILE *f;
if(!key_created) {
key_created = 1;
ub_thread_key_create(&logkey, NULL);
lock_quick_init(&log_lock);
}
lock_quick_lock(&log_lock);
if(logfile
#if defined(HAVE_SYSLOG_H) || defined(UB_ON_WINDOWS)
|| logging_to_syslog
#endif
) {
lock_quick_unlock(&log_lock); /* verbose() needs the lock */
verbose(VERB_QUERY, "switching log to %s",
use_syslog?"syslog":(filename&&filename[0]?filename:"stderr"));
lock_quick_lock(&log_lock);
}
if(logfile && logfile != stderr)
fclose(logfile);
#ifdef HAVE_SYSLOG_H
if(logging_to_syslog) {
closelog();
logging_to_syslog = 0;
}
if(use_syslog) {
/* do not delay opening until first write, because we may
* chroot and no longer be able to access dev/log and so on */
openlog(ident, LOG_NDELAY, LOG_DAEMON);
logging_to_syslog = 1;
lock_quick_unlock(&log_lock);
return;
}
#elif defined(UB_ON_WINDOWS)
if(logging_to_syslog) {
logging_to_syslog = 0;
}
if(use_syslog) {
logging_to_syslog = 1;
lock_quick_unlock(&log_lock);
return;
}
#endif /* HAVE_SYSLOG_H */
if(!filename || !filename[0]) {
logfile = stderr;
lock_quick_unlock(&log_lock);
return;
}
/* open the file for logging */
if(chrootdir && chrootdir[0] && strncmp(filename, chrootdir,
strlen(chrootdir)) == 0)
filename += strlen(chrootdir);
f = fopen(filename, "a");
if(!f) {
lock_quick_unlock(&log_lock);
log_err("Could not open logfile %s: %s", filename,
strerror(errno));
return;
}
#ifndef UB_ON_WINDOWS
/* line buffering does not work on windows */
setvbuf(f, NULL, (int)_IOLBF, 0);
#endif
logfile = f;
lock_quick_unlock(&log_lock);
}
void log_file(FILE *f)
{
lock_quick_lock(&log_lock);
logfile = f;
lock_quick_unlock(&log_lock);
}
void log_thread_set(int* num)
{
ub_thread_key_set(logkey, num);
}
void log_ident_set(const char* id)
{
ident = id;
}
void log_set_time(time_t* t)
{
log_now = t;
}
void log_set_time_asc(int use_asc)
{
log_time_asc = use_asc;
}
void
log_vmsg(int pri, const char* type,
const char *format, va_list args)
{
char message[MAXSYSLOGMSGLEN];
unsigned int* tid = (unsigned int*)ub_thread_key_get(logkey);
time_t now;
#if defined(HAVE_STRFTIME) && defined(HAVE_LOCALTIME_R)
char tmbuf[32];
struct tm tm;
#elif defined(UB_ON_WINDOWS)
char tmbuf[128], dtbuf[128];
#endif
(void)pri;
vsnprintf(message, sizeof(message), format, args);
#ifdef HAVE_SYSLOG_H
if(logging_to_syslog) {
syslog(pri, "[%d:%x] %s: %s",
(int)getpid(), tid?*tid:0, type, message);
return;
}
#elif defined(UB_ON_WINDOWS)
if(logging_to_syslog) {
char m[32768];
HANDLE* s;
LPCTSTR str = m;
DWORD tp = MSG_GENERIC_ERR;
WORD wt = EVENTLOG_ERROR_TYPE;
if(strcmp(type, "info") == 0) {
tp=MSG_GENERIC_INFO;
wt=EVENTLOG_INFORMATION_TYPE;
} else if(strcmp(type, "warning") == 0) {
tp=MSG_GENERIC_WARN;
wt=EVENTLOG_WARNING_TYPE;
} else if(strcmp(type, "notice") == 0
|| strcmp(type, "debug") == 0) {
tp=MSG_GENERIC_SUCCESS;
wt=EVENTLOG_SUCCESS;
}
snprintf(m, sizeof(m), "[%s:%x] %s: %s",
ident, tid?*tid:0, type, message);
s = RegisterEventSource(NULL, SERVICE_NAME);
if(!s) return;
ReportEvent(s, wt, 0, tp, NULL, 1, 0, &str, NULL);
DeregisterEventSource(s);
return;
}
#endif /* HAVE_SYSLOG_H */
lock_quick_lock(&log_lock);
if(!logfile) {
lock_quick_unlock(&log_lock);
return;
}
if(log_now)
now = (time_t)*log_now;
else now = (time_t)time(NULL);
#if defined(HAVE_STRFTIME) && defined(HAVE_LOCALTIME_R)
if(log_time_asc && strftime(tmbuf, sizeof(tmbuf), "%b %d %H:%M:%S",
localtime_r(&now, &tm))%(sizeof(tmbuf)) != 0) {
/* %sizeof buf!=0 because old strftime returned max on error */
fprintf(logfile, "%s %s[%d:%x] %s: %s\n", tmbuf,
ident, (int)getpid(), tid?*tid:0, type, message);
} else
#elif defined(UB_ON_WINDOWS)
if(log_time_asc && GetTimeFormat(LOCALE_USER_DEFAULT, 0, NULL, NULL,
tmbuf, sizeof(tmbuf)) && GetDateFormat(LOCALE_USER_DEFAULT, 0,
NULL, NULL, dtbuf, sizeof(dtbuf))) {
fprintf(logfile, "%s %s %s[%d:%x] %s: %s\n", dtbuf, tmbuf,
ident, (int)getpid(), tid?*tid:0, type, message);
} else
#endif
fprintf(logfile, "[" ARG_LL "d] %s[%d:%x] %s: %s\n", (long long)now,
ident, (int)getpid(), tid?*tid:0, type, message);
#ifdef UB_ON_WINDOWS
/* line buffering does not work on windows */
fflush(logfile);
#endif
lock_quick_unlock(&log_lock);
}
/**
* implementation of log_info
* @param format: format string printf-style.
*/
void
log_info(const char *format, ...)
{
va_list args;
va_start(args, format);
log_vmsg(LOG_INFO, "info", format, args);
va_end(args);
}
/**
* implementation of log_err
* @param format: format string printf-style.
*/
void
log_err(const char *format, ...)
{
va_list args;
va_start(args, format);
log_vmsg(LOG_ERR, "error", format, args);
va_end(args);
}
/**
* implementation of log_warn
* @param format: format string printf-style.
*/
void
log_warn(const char *format, ...)
{
va_list args;
va_start(args, format);
log_vmsg(LOG_WARNING, "warning", format, args);
va_end(args);
}
/**
* implementation of fatal_exit
* @param format: format string printf-style.
*/
void
fatal_exit(const char *format, ...)
{
va_list args;
va_start(args, format);
log_vmsg(LOG_CRIT, "fatal error", format, args);
va_end(args);
exit(1);
}
/**
* implementation of verbose
* @param level: verbose level for the message.
* @param format: format string printf-style.
*/
void
verbose(enum verbosity_value level, const char* format, ...)
{
va_list args;
va_start(args, format);
if(verbosity >= level) {
if(level == VERB_OPS)
log_vmsg(LOG_NOTICE, "notice", format, args);
else if(level == VERB_DETAIL)
log_vmsg(LOG_INFO, "info", format, args);
else log_vmsg(LOG_DEBUG, "debug", format, args);
}
va_end(args);
}
/** log hex data */
static void
log_hex_f(enum verbosity_value v, const char* msg, void* data, size_t length)
{
size_t i, j;
uint8_t* data8 = (uint8_t*)data;
const char* hexchar = "0123456789ABCDEF";
char buf[1024+1]; /* alloc blocksize hex chars + \0 */
const size_t blocksize = 512;
size_t len;
if(length == 0) {
verbose(v, "%s[%u]", msg, (unsigned)length);
return;
}
for(i=0; i<length; i+=blocksize/2) {
len = blocksize/2;
if(length - i < blocksize/2)
len = length - i;
for(j=0; j<len; j++) {
buf[j*2] = hexchar[ data8[i+j] >> 4 ];
buf[j*2 + 1] = hexchar[ data8[i+j] & 0xF ];
}
buf[len*2] = 0;
verbose(v, "%s[%u:%u] %.*s", msg, (unsigned)length,
(unsigned)i, (int)len*2, buf);
}
}
void
log_hex(const char* msg, void* data, size_t length)
{
log_hex_f(verbosity, msg, data, length);
}
void log_buf(enum verbosity_value level, const char* msg, sldns_buffer* buf)
{
if(verbosity < level)
return;
log_hex_f(level, msg, sldns_buffer_begin(buf), sldns_buffer_limit(buf));
}
#ifdef USE_WINSOCK
char* wsa_strerror(DWORD err)
{
static char unknown[32];
switch(err) {
case WSA_INVALID_HANDLE: return "Specified event object handle is invalid.";
case WSA_NOT_ENOUGH_MEMORY: return "Insufficient memory available.";
case WSA_INVALID_PARAMETER: return "One or more parameters are invalid.";
case WSA_OPERATION_ABORTED: return "Overlapped operation aborted.";
case WSA_IO_INCOMPLETE: return "Overlapped I/O event object not in signaled state.";
case WSA_IO_PENDING: return "Overlapped operations will complete later.";
case WSAEINTR: return "Interrupted function call.";
case WSAEBADF: return "File handle is not valid.";
case WSAEACCES: return "Permission denied.";
case WSAEFAULT: return "Bad address.";
case WSAEINVAL: return "Invalid argument.";
case WSAEMFILE: return "Too many open files.";
case WSAEWOULDBLOCK: return "Resource temporarily unavailable.";
case WSAEINPROGRESS: return "Operation now in progress.";
case WSAEALREADY: return "Operation already in progress.";
case WSAENOTSOCK: return "Socket operation on nonsocket.";
case WSAEDESTADDRREQ: return "Destination address required.";
case WSAEMSGSIZE: return "Message too long.";
case WSAEPROTOTYPE: return "Protocol wrong type for socket.";
case WSAENOPROTOOPT: return "Bad protocol option.";
case WSAEPROTONOSUPPORT: return "Protocol not supported.";
case WSAESOCKTNOSUPPORT: return "Socket type not supported.";
case WSAEOPNOTSUPP: return "Operation not supported.";
case WSAEPFNOSUPPORT: return "Protocol family not supported.";
case WSAEAFNOSUPPORT: return "Address family not supported by protocol family.";
case WSAEADDRINUSE: return "Address already in use.";
case WSAEADDRNOTAVAIL: return "Cannot assign requested address.";
case WSAENETDOWN: return "Network is down.";
case WSAENETUNREACH: return "Network is unreachable.";
case WSAENETRESET: return "Network dropped connection on reset.";
case WSAECONNABORTED: return "Software caused connection abort.";
case WSAECONNRESET: return "Connection reset by peer.";
case WSAENOBUFS: return "No buffer space available.";
case WSAEISCONN: return "Socket is already connected.";
case WSAENOTCONN: return "Socket is not connected.";
case WSAESHUTDOWN: return "Cannot send after socket shutdown.";
case WSAETOOMANYREFS: return "Too many references.";
case WSAETIMEDOUT: return "Connection timed out.";
case WSAECONNREFUSED: return "Connection refused.";
case WSAELOOP: return "Cannot translate name.";
case WSAENAMETOOLONG: return "Name too long.";
case WSAEHOSTDOWN: return "Host is down.";
case WSAEHOSTUNREACH: return "No route to host.";
case WSAENOTEMPTY: return "Directory not empty.";
case WSAEPROCLIM: return "Too many processes.";
case WSAEUSERS: return "User quota exceeded.";
case WSAEDQUOT: return "Disk quota exceeded.";
case WSAESTALE: return "Stale file handle reference.";
case WSAEREMOTE: return "Item is remote.";
case WSASYSNOTREADY: return "Network subsystem is unavailable.";
case WSAVERNOTSUPPORTED: return "Winsock.dll version out of range.";
case WSANOTINITIALISED: return "Successful WSAStartup not yet performed.";
case WSAEDISCON: return "Graceful shutdown in progress.";
case WSAENOMORE: return "No more results.";
case WSAECANCELLED: return "Call has been canceled.";
case WSAEINVALIDPROCTABLE: return "Procedure call table is invalid.";
case WSAEINVALIDPROVIDER: return "Service provider is invalid.";
case WSAEPROVIDERFAILEDINIT: return "Service provider failed to initialize.";
case WSASYSCALLFAILURE: return "System call failure.";
case WSASERVICE_NOT_FOUND: return "Service not found.";
case WSATYPE_NOT_FOUND: return "Class type not found.";
case WSA_E_NO_MORE: return "No more results.";
case WSA_E_CANCELLED: return "Call was canceled.";
case WSAEREFUSED: return "Database query was refused.";
case WSAHOST_NOT_FOUND: return "Host not found.";
case WSATRY_AGAIN: return "Nonauthoritative host not found.";
case WSANO_RECOVERY: return "This is a nonrecoverable error.";
case WSANO_DATA: return "Valid name, no data record of requested type.";
case WSA_QOS_RECEIVERS: return "QOS receivers.";
case WSA_QOS_SENDERS: return "QOS senders.";
case WSA_QOS_NO_SENDERS: return "No QOS senders.";
case WSA_QOS_NO_RECEIVERS: return "QOS no receivers.";
case WSA_QOS_REQUEST_CONFIRMED: return "QOS request confirmed.";
case WSA_QOS_ADMISSION_FAILURE: return "QOS admission error.";
case WSA_QOS_POLICY_FAILURE: return "QOS policy failure.";
case WSA_QOS_BAD_STYLE: return "QOS bad style.";
case WSA_QOS_BAD_OBJECT: return "QOS bad object.";
case WSA_QOS_TRAFFIC_CTRL_ERROR: return "QOS traffic control error.";
case WSA_QOS_GENERIC_ERROR: return "QOS generic error.";
case WSA_QOS_ESERVICETYPE: return "QOS service type error.";
case WSA_QOS_EFLOWSPEC: return "QOS flowspec error.";
case WSA_QOS_EPROVSPECBUF: return "Invalid QOS provider buffer.";
case WSA_QOS_EFILTERSTYLE: return "Invalid QOS filter style.";
case WSA_QOS_EFILTERTYPE: return "Invalid QOS filter type.";
case WSA_QOS_EFILTERCOUNT: return "Incorrect QOS filter count.";
case WSA_QOS_EOBJLENGTH: return "Invalid QOS object length.";
case WSA_QOS_EFLOWCOUNT: return "Incorrect QOS flow count.";
/*case WSA_QOS_EUNKOWNPSOBJ: return "Unrecognized QOS object.";*/
case WSA_QOS_EPOLICYOBJ: return "Invalid QOS policy object.";
case WSA_QOS_EFLOWDESC: return "Invalid QOS flow descriptor.";
case WSA_QOS_EPSFLOWSPEC: return "Invalid QOS provider-specific flowspec.";
case WSA_QOS_EPSFILTERSPEC: return "Invalid QOS provider-specific filterspec.";
case WSA_QOS_ESDMODEOBJ: return "Invalid QOS shape discard mode object.";
case WSA_QOS_ESHAPERATEOBJ: return "Invalid QOS shaping rate object.";
case WSA_QOS_RESERVED_PETYPE: return "Reserved policy QOS element type.";
default:
snprintf(unknown, sizeof(unknown),
"unknown WSA error code %d", (int)err);
return unknown;
}
}
#endif /* USE_WINSOCK */
