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#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <syslog.h>
#endif
#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
static HANDLE log_handle = INVALID_HANDLE;
#define MESSAGE_SUBKEY \
"SYSTEM\\CurrentControlSet\\Services\\EventLog\\Application\\rpcapd"
static void rpcapd_log_init(void)
{
if (log_to_systemlog)
{
HKEY hey_handle;
/*
* 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 to the
* standard error.
*/
log_to_systemlog = 0;
return;
}
log_handle = RegisterEventSource(NULL, "rpcapd");
}
}
static void rpcapd_vlog_systemlog(log_priority priority, const char *message,
va_list ap)
{
WORD eventlog_type;
DWORD event_id;
char msgbuf[1024];
char *strings[1];
if (log_handle == INVALID_HANDLE) {
/* Failed to initialize, or haven't tried */
return;
}
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
static void rpcapd_log_init(void)
{
if (log_to_systemlog)
{
openlog("rpcapd", LOG_PID, LOG_DAEMON);
}
}
static void rpcapd_vlog_systemlog(log_priority priority, const char *message,
va_list ap)
{
int syslog_priority;
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;
}
vsyslog(syslog_priority, message, ap);
}
#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, ...)
{
static int initialized = 0;
va_list ap;
if (!initialized) {
//
// Initialize the logging system.
//
rpcapd_log_init();
initialized = 1;
}
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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