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/*
* (C) 2006 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Description: Logging support for the conntrack daemon
*/
#include "log.h"
#include "buffer.h"
#include "conntrackd.h"
#include <time.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
int init_log(void)
{
if (CONFIG(logfile)[0]) {
STATE(log) = fopen(CONFIG(logfile), "a+");
if (STATE(log) == NULL) {
fprintf(stderr, "ERROR: can't open logfile `%s'."
"Reason: %s\n", CONFIG(logfile),
strerror(errno));
return -1;
}
}
if (CONFIG(stats).logfile[0]) {
STATE(stats_log) = fopen(CONFIG(stats).logfile, "a+");
if (STATE(stats_log) == NULL) {
fprintf(stderr, "ERROR: can't open logfile `%s'."
"Reason: %s\n", CONFIG(stats).logfile,
strerror(errno));
return -1;
}
}
if (CONFIG(syslog_facility) != -1 ||
CONFIG(stats).syslog_facility != -1)
openlog(PACKAGE, LOG_PID, CONFIG(syslog_facility));
return 0;
}
void dlog(FILE *fd, int priority, const char *format, ...)
{
time_t t;
char *buf;
const char *prio;
va_list args;
if (fd) {
t = time(NULL);
buf = ctime(&t);
buf[strlen(buf)-1]='\0';
switch (priority) {
case LOG_INFO:
prio = "info";
break;
case LOG_NOTICE:
prio = "notice";
break;
case LOG_WARNING:
prio = "warning";
break;
case LOG_ERR:
prio = "ERROR";
break;
default:
prio = "?";
break;
}
va_start(args, format);
fprintf(fd, "[%s] (pid=%d) [%s] ", buf, getpid(), prio);
vfprintf(fd, format, args);
va_end(args);
fprintf(fd, "\n");
fflush(fd);
}
if (CONFIG(syslog_facility) != -1) {
va_start(args, format);
vsyslog(priority, format, args);
va_end(args);
}
}
void dlog_buffered_ct_flush(void *buffer_data, void *data)
{
FILE *fd = data;
fprintf(fd, "%s", (const char*)buffer_data);
fflush(fd);
}
void dlog_buffered_ct(FILE *fd, struct buffer *b, struct nf_conntrack *ct)
{
time_t t;
char buf[1024];
char *tmp;
t = time(NULL);
ctime_r(&t, buf);
tmp = buf + strlen(buf);
buf[strlen(buf)-1]='\t';
nfct_snprintf(buf+strlen(buf), 1024-strlen(buf), ct, 0, 0, 0);
if (fd) {
snprintf(buf+strlen(buf), 1024-strlen(buf), "\n");
/* zero size buffer: force fflush */
if (buffer_size(b) == 0) {
fprintf(fd, "%s", buf);
fflush(fd);
}
if (buffer_add(b, buf, strlen(buf)) == -1) {
buffer_flush(b, dlog_buffered_ct_flush, fd);
if (buffer_add(b, buf, strlen(buf)) == -1) {
/* buffer too small, catacrocket! */
fprintf(fd, "%s", buf);
fflush(fd);
}
}
}
if (CONFIG(stats).syslog_facility != -1)
syslog(LOG_INFO, "%s", tmp);
}
void close_log(void)
{
if (STATE(log) != NULL)
fclose(STATE(log));
if (STATE(stats_log) != NULL)
fclose(STATE(stats_log));
if (CONFIG(syslog_facility) != -1 ||
CONFIG(stats).syslog_facility != -1)
closelog();
}
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