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/*
* Copyright (c) 1993, 1994, 1995, 1996, 1998
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <syslog.h>
#endif
#include "portability.h"
#include "log.h"
static int log_to_systemlog;
static int log_debug_messages;
static void rpcapd_vlog_stderr(log_priority,
PCAP_FORMAT_STRING(const char *), va_list) PCAP_PRINTFLIKE(2, 0);
static void rpcapd_vlog_stderr(log_priority priority, const char *message, va_list ap)
{
const char *tag;
/*
* Squelch warnings from compilers that *don't* assume that
* priority always has a valid enum value and therefore don't
* assume that we'll always go through one of the case arms.
*
* If we have a default case, compilers that *do* assume that
* will then complain about the default case code being
* unreachable.
*
* Damned if you do, damned if you don't.
*/
tag = "";
switch (priority) {
case LOGPRIO_DEBUG:
tag = "DEBUG: ";
break;
case LOGPRIO_INFO:
tag = "";
break;
case LOGPRIO_WARNING:
tag = "warning: ";
break;
case LOGPRIO_ERROR:
tag = "error: ";
break;
}
fprintf(stderr, "rpcapd: %s", tag);
vfprintf(stderr, message, ap);
putc('\n', stderr);
}
static void rpcapd_vlog_systemlog(log_priority,
PCAP_FORMAT_STRING(const char *), va_list) PCAP_PRINTFLIKE(2, 0);
#ifdef _WIN32
#define MESSAGE_SUBKEY \
"SYSTEM\\CurrentControlSet\\Services\\EventLog\\Application\\rpcapd"
static void rpcapd_vlog_systemlog(log_priority priority, const char *message,
va_list ap)
{
#if 0
static int initialized = 0;
HKEY hey_handle;
static HANDLE log_handle;
WORD eventlog_type;
DWORD event_id;
char msgbuf[1024];
char *strings[1];
if (!initialized) {
/*
* Register our message stuff in the Registry.
*
* First, create the registry key for us. If the key
* already exists, this succeeds and returns a handle
* for it.
*/
if (RegCreateKey(HKEY_LOCAL_MACHINE, MESSAGE_SUBKEY,
&key_handle) != ERROR_SUCCESS) {
/*
* Failed - give up and just log this message,
* and all subsequent messages, to the
* standard error.
*/
log_to_systemlog = 0;
initialized = 1;
rpcapd_vlog_stderr(priority, message, ap);
return;
}
log_handle = RegisterEventSource(NULL, "rpcapd");
initialized = 1;
}
switch (priority) {
case LOGPRIO_DEBUG:
//
// XXX - what *should* we do about debug messages?
//
eventlog_type = EVENTLOG_INFORMATION_TYPE;
event_id = RPCAPD_INFO_ID;
break;
case LOGPRIO_INFO:
eventlog_type = EVENTLOG_INFORMATION_TYPE;
event_id = RPCAPD_INFO_ID;
break;
case LOGPRIO_WARNING:
eventlog_type = EVENTLOG_WARNING_TYPE;
event_id = RPCAPD_WARNING_ID;
break;
case LOGPRIO_ERROR:
eventlog_type = EVENTLOG_ERROR_TYPE;
event_id = RPCAPD_ERROR_ID;
break;
default:
/* Don't do this. */
return;
}
vsprintf(msgbuf, message, ap);
strings[0] = msgbuf;
/*
* If this fails, how are we going to report it?
*/
(void) ReportEvent(log_handle, eventlog_type, 0, event_id, NULL, 1, 0,
strings, NULL);
#else
rpcapd_vlog_stderr(priority, message, ap);
#endif
}
#else
static void rpcapd_vlog_systemlog(log_priority priority, const char *message,
va_list ap)
{
static int initialized = 0;
int syslog_priority;
if (!initialized) {
//
// Open the log.
//
openlog("rpcapd", LOG_PID, LOG_DAEMON);
initialized = 1;
}
switch (priority) {
case LOGPRIO_DEBUG:
syslog_priority = LOG_DEBUG;
break;
case LOGPRIO_INFO:
syslog_priority = LOG_INFO;
break;
case LOGPRIO_WARNING:
syslog_priority = LOG_WARNING;
break;
case LOGPRIO_ERROR:
syslog_priority = LOG_ERR;
break;
default:
/* Don't do this. */
return;
}
#ifdef HAVE_VSYSLOG
vsyslog(syslog_priority, message, ap);
#else
/*
* Thanks, IBM, for not providing vsyslog() in AIX!
*
* They also warn that the syslog functions shouldn't
* be used in multithreaded programs, but the only thing
* obvious that seems to make the syslog_r functions
* better is that they have an additional argument
* that points to the information that's static to
* the syslog code in non-thread-safe versions. Most
* of that data is set by openlog(); since we already
* do an openlog before doing logging, and don't
* change that data afterwards, I suspect that, in
* practice, the regular syslog routines are OK for
* us (especially given that we'd end up having one
* static struct syslog_data anyway, which means we'd
* just be like the non-thread-safe version).
*/
char logbuf[1024+1];
pcap_vsnprintf(logbuf, sizeof logbuf, message, ap);
syslog(syslog_priority, "%s", logbuf);
#endif
}
#endif
void rpcapd_log_set(int log_to_systemlog_arg, int log_debug_messages_arg)
{
log_debug_messages = log_debug_messages_arg;
log_to_systemlog = log_to_systemlog_arg;
}
void rpcapd_log(log_priority priority, const char *message, ...)
{
va_list ap;
if (priority != LOGPRIO_DEBUG || log_debug_messages) {
va_start(ap, message);
if (log_to_systemlog)
{
rpcapd_vlog_systemlog(priority, message, ap);
}
else
{
rpcapd_vlog_stderr(priority, message, ap);
}
va_end(ap);
}
}
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