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/*
* Copyright (c) 2009, Rambler media
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY Rambler media ''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 Rambler 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.
*/
#include "config.h"
#include "logger.h"
#include "util.h"
#include "main.h"
#include "map.h"
/* How much message should be repeated before it is count to be repeated one */
#define REPEATS_MIN 3
#define REPEATS_MAX 300
#ifdef RSPAMD_MAIN
sig_atomic_t do_reopen_log = 0;
#endif
typedef struct rspamd_logger_s {
rspamd_log_func_t log_func;
struct config_file *cfg;
struct {
uint32_t size;
uint32_t used;
u_char *buf;
} io_buf;
int fd;
gboolean is_buffered;
gboolean enabled;
enum rspamd_log_type type;
pid_t pid;
enum process_type process_type;
radix_tree_t *debug_ip;
uint32_t last_line_cksum;
uint32_t repeats;
gchar *saved_message;
gchar *saved_function;
} rspamd_logger_t;
rspamd_logger_t *rspamd_log = NULL;
static const char lf_chr = '\n';
static void
syslog_log_function (const gchar * log_domain, const gchar *function,
GLogLevelFlags log_level, const gchar * message,
gboolean forced, gpointer arg);
static void
file_log_function (const gchar * log_domain, const gchar *function,
GLogLevelFlags log_level, const gchar * message,
gboolean forced, gpointer arg);
static inline uint32_t
rspamd_log_calculate_cksum (const gchar *message, size_t mlen)
{
const gchar *bp = message;
const gchar *be = bp + mlen;
uint32_t hval = 0;
while (bp < be) {
hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
hval ^= (uint32_t)*bp++;
}
/* return our new hash value */
return hval;
}
static void
direct_write_log_line (void *data, int count, gboolean is_iov)
{
char errmsg[128];
struct iovec *iov;
const char *line;
int r;
if (rspamd_log->enabled) {
if (is_iov) {
iov = (struct iovec *)data;
r = writev (rspamd_log->fd, iov, count);
}
else {
line = (const char *)data;
r = write (rspamd_log->fd, line, count);
}
if (r == -1) {
/* We cannot write message to file, so we need to detect error and make decision */
r = rspamd_snprintf (errmsg, sizeof (errmsg), "direct_write_log_line: cannot write log line: %s", strerror (errno));
if (errno == EBADF || errno == EIO || errno == EINTR) {
/* Descriptor is somehow invalid, try to restart */
reopen_log ();
if (write (rspamd_log->fd, errmsg, r) != -1) {
/* Try again */
direct_write_log_line (data, count, is_iov);
}
}
else if (errno == EFAULT || errno == EINVAL || errno == EFBIG || errno == ENOSPC) {
/* Rare case */
(void)write (rspamd_log->fd, errmsg, r);
}
else if (errno == EPIPE) {
/* We write to some pipe and it disappears, disable logging */
rspamd_log->enabled = FALSE;
}
}
}
}
/* Logging utility functions */
int
open_log (void)
{
rspamd_log->enabled = TRUE;
switch (rspamd_log->cfg->log_type) {
case RSPAMD_LOG_CONSOLE:
/* Do nothing with console */
return 0;
case RSPAMD_LOG_SYSLOG:
openlog ("rspamd", LOG_NDELAY | LOG_PID, rspamd_log->cfg->log_facility);
return 0;
case RSPAMD_LOG_FILE:
rspamd_log->fd = open (rspamd_log->cfg->log_file, O_CREAT | O_WRONLY | O_APPEND, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
if (rspamd_log->fd == -1) {
fprintf (stderr, "open_log: cannot open desired log file: %s, %s", rspamd_log->cfg->log_file, strerror (errno));
return -1;
}
return 0;
}
return -1;
}
void
close_log (void)
{
char tmpbuf[256];
flush_log_buf ();
switch (rspamd_log->type) {
case RSPAMD_LOG_CONSOLE:
/* Do nothing special */
break;
case RSPAMD_LOG_SYSLOG:
closelog ();
break;
case RSPAMD_LOG_FILE:
if (rspamd_log->enabled) {
if (rspamd_log->repeats > REPEATS_MIN) {
snprintf (tmpbuf, sizeof (tmpbuf), "Last message repeated %u times", rspamd_log->repeats);
rspamd_log->repeats = 0;
if (rspamd_log->saved_message) {
file_log_function (NULL, rspamd_log->saved_function, rspamd_log->cfg->log_level, rspamd_log->saved_message, TRUE, NULL);
g_free (rspamd_log->saved_message);
g_free (rspamd_log->saved_function);
rspamd_log->saved_message = NULL;
rspamd_log->saved_function = NULL;
}
/* It is safe to use temporary buffer here as it is not static */
file_log_function (NULL, __FUNCTION__, rspamd_log->cfg->log_level, tmpbuf, TRUE, NULL);
return;
}
if (fsync (rspamd_log->fd) == -1) {
msg_err ("error syncing log file: %s", strerror (errno));
}
close (rspamd_log->fd);
}
break;
}
rspamd_log->enabled = FALSE;
}
void
rspamd_set_logger (enum rspamd_log_type type, enum process_type ptype, struct config_file *cfg)
{
char **strvec, *p, *err;
int num, i, k;
struct in_addr addr;
uint32_t mask = 0xFFFFFFFF;
if (rspamd_log == NULL) {
rspamd_log = g_malloc (sizeof (rspamd_logger_t));
bzero (rspamd_log, sizeof (rspamd_logger_t));
}
rspamd_log->type = type;
rspamd_log->pid = getpid ();
rspamd_log->process_type = ptype;
switch (type) {
case RSPAMD_LOG_CONSOLE:
rspamd_log->log_func = file_log_function;
rspamd_log->fd = STDERR_FILENO;
break;
case RSPAMD_LOG_SYSLOG:
rspamd_log->log_func = syslog_log_function;
break;
case RSPAMD_LOG_FILE:
rspamd_log->log_func = file_log_function;
break;
}
rspamd_log->cfg = cfg;
/* Set up buffer */
if (cfg->log_buffered) {
if (cfg->log_buf_size != 0) {
rspamd_log->io_buf.size = cfg->log_buf_size;
}
else {
rspamd_log->io_buf.size = BUFSIZ;
}
rspamd_log->is_buffered = TRUE;
rspamd_log->io_buf.buf = g_malloc (rspamd_log->io_buf.size);
}
/* Set up conditional logging */
if (cfg->debug_ip_map != NULL) {
/* Try to add it as map first of all */
rspamd_log->debug_ip = radix_tree_create ();
if (!add_map (cfg->debug_ip_map, read_radix_list, fin_radix_list, (void **)&rspamd_log->debug_ip)) {
/* Try to parse it as list */
strvec = g_strsplit (cfg->debug_ip_map, ",; ", 0);
num = g_strv_length (strvec);
for (i = 0; i < num; i++) {
g_strstrip (strvec[i]);
if ((p = strchr (strvec[i], '/')) != NULL) {
/* Try to extract mask */
*p = '\0';
p ++;
errno = 0;
k = strtoul (p, &err, 10);
if (errno != 0 || *err != '\0' || k > 32) {
continue;
}
}
else {
k = 32;
}
if (inet_aton (strvec[i], &addr)) {
/* Check ip */
mask = mask << (32 - k);
radix32tree_insert (rspamd_log->debug_ip, ntohl (addr.s_addr), mask, 1);
}
}
g_strfreev (strvec);
}
}
}
int
reopen_log (void)
{
#ifdef RSPAMD_MAIN
do_reopen_log = 0;
#endif
close_log ();
return open_log ();
}
void
update_log_pid (enum process_type ptype)
{
rspamd_log->pid = getpid ();
rspamd_log->process_type = ptype;
}
void
flush_log_buf (void)
{
if (rspamd_log->is_buffered && (rspamd_log->type == RSPAMD_LOG_CONSOLE || rspamd_log->type == RSPAMD_LOG_FILE)) {
direct_write_log_line (rspamd_log->io_buf.buf, rspamd_log->io_buf.used, FALSE);
rspamd_log->io_buf.used = 0;
}
}
void
rspamd_common_log_function (GLogLevelFlags log_level, const char *function, const char *fmt, ...)
{
static char logbuf[BUFSIZ];
va_list vp;
u_char *end;
if (log_level <= rspamd_log->cfg->log_level) {
va_start (vp, fmt);
end = rspamd_vsnprintf (logbuf, sizeof (logbuf), fmt, vp);
*end = '\0';
va_end (vp);
rspamd_log->log_func (NULL, function, log_level, logbuf, FALSE, rspamd_log->cfg);
}
}
/* Fill buffer with message (limits must be checked BEFORE this call) */
static void
fill_buffer (const struct iovec *iov, int iovcnt)
{
int i;
for (i = 0; i < iovcnt; i ++) {
memcpy (rspamd_log->io_buf.buf + rspamd_log->io_buf.used, iov[i].iov_base, iov[i].iov_len);
rspamd_log->io_buf.used += iov[i].iov_len;
}
}
/* Write message to buffer or to file */
static void
file_log_helper (const struct iovec *iov, int iovcnt)
{
size_t len = 0;
int i;
if (! rspamd_log->is_buffered) {
/* Write string directly */
direct_write_log_line ((void *)iov, iovcnt, TRUE);
}
else {
/* Calculate total length */
for (i = 0; i < iovcnt; i ++) {
len += iov[i].iov_len;
}
/* Fill buffer */
if (rspamd_log->io_buf.size < len) {
/* Buffer is too small to hold this string, so write it dirrectly */
flush_log_buf ();
direct_write_log_line ((void *)iov, iovcnt, TRUE);
}
else if (rspamd_log->io_buf.used + len >= rspamd_log->io_buf.size) {
/* Buffer is full, try to write it dirrectly */
flush_log_buf ();
fill_buffer (iov, iovcnt);
}
else {
/* Copy incoming string to buffer */
fill_buffer (iov, iovcnt);
}
}
}
static void
syslog_log_function (const gchar * log_domain, const gchar *function, GLogLevelFlags log_level, const gchar * message, gboolean forced, gpointer arg)
{
struct config_file *cfg = (struct config_file *)arg;
#ifdef RSPAMD_MAIN
if (do_reopen_log) {
reopen_log ();
}
#endif
if (! rspamd_log->enabled) {
return;
}
if (function == NULL) {
if (forced || log_level <= cfg->log_level) {
if (forced || log_level >= G_LOG_LEVEL_DEBUG) {
syslog (LOG_DEBUG, "%s", message);
}
else if (log_level >= G_LOG_LEVEL_INFO) {
syslog (LOG_INFO, "%s", message);
}
else if (log_level >= G_LOG_LEVEL_WARNING) {
syslog (LOG_WARNING, "%s", message);
}
else if (log_level >= G_LOG_LEVEL_CRITICAL) {
syslog (LOG_ERR, "%s", message);
}
}
}
else {
if (forced || log_level <= cfg->log_level) {
if (log_level >= G_LOG_LEVEL_DEBUG) {
syslog (LOG_DEBUG, "%s: %s", function, message);
}
else if (log_level >= G_LOG_LEVEL_INFO) {
syslog (LOG_INFO, "%s: %s", function, message);
}
else if (log_level >= G_LOG_LEVEL_WARNING) {
syslog (LOG_WARNING, "%s: %s", function, message);
}
else if (log_level >= G_LOG_LEVEL_CRITICAL) {
syslog (LOG_ERR, "%s: %s", function, message);
}
}
}
}
static void
file_log_function (const gchar * log_domain, const gchar *function, GLogLevelFlags log_level, const gchar * message, gboolean forced, gpointer arg)
{
char tmpbuf[256], timebuf[32];
time_t now;
struct tm *tms;
struct iovec iov[3];
int r;
uint32_t cksum;
size_t mlen;
const char *cptype = NULL;
if (! rspamd_log->enabled) {
return;
}
#ifdef RSPAMD_MAIN
if (do_reopen_log) {
reopen_log ();
}
#endif
if (forced || log_level <= rspamd_log->cfg->log_level) {
/* Check repeats */
mlen = strlen (message);
cksum = rspamd_log_calculate_cksum (message, mlen);
if (cksum == rspamd_log->last_line_cksum) {
rspamd_log->repeats ++;
if (rspamd_log->repeats > REPEATS_MIN && rspamd_log->repeats < REPEATS_MAX) {
/* Do not log anything */
if (rspamd_log->saved_message == 0) {
rspamd_log->saved_message = g_strdup (message);
rspamd_log->saved_function = g_strdup (function);
}
return;
}
else if (rspamd_log->repeats > REPEATS_MAX) {
snprintf (tmpbuf, sizeof (tmpbuf), "Last message repeated %u times", rspamd_log->repeats);
rspamd_log->repeats = 0;
/* It is safe to use temporary buffer here as it is not static */
if (rspamd_log->saved_message) {
file_log_function (log_domain, rspamd_log->saved_function, log_level, rspamd_log->saved_message, forced, arg);
}
file_log_function (log_domain, __FUNCTION__, log_level, tmpbuf, forced, arg);
file_log_function (log_domain, function, log_level, message, forced, arg);
rspamd_log->repeats = REPEATS_MIN + 1;
return;
}
}
else {
rspamd_log->last_line_cksum = cksum;
if (rspamd_log->repeats > REPEATS_MIN) {
snprintf (tmpbuf, sizeof (tmpbuf), "Last message repeated %u times", rspamd_log->repeats);
rspamd_log->repeats = 0;
if (rspamd_log->saved_message) {
file_log_function (log_domain, rspamd_log->saved_function, log_level, rspamd_log->saved_message, forced, arg);
g_free (rspamd_log->saved_message);
g_free (rspamd_log->saved_function);
rspamd_log->saved_message = NULL;
rspamd_log->saved_function = NULL;
}
file_log_function (log_domain, __FUNCTION__, log_level, tmpbuf, forced, arg);
/* It is safe to use temporary buffer here as it is not static */
file_log_function (log_domain, function, log_level, message, forced, arg);
return;
}
else {
rspamd_log->repeats = 0;
}
}
now = time (NULL);
tms = localtime (&now);
strftime (timebuf, sizeof (timebuf), "%b %d %H:%M:%S", tms);
switch (rspamd_log->process_type) {
case TYPE_MAIN:
cptype = "main";
break;
case TYPE_WORKER:
cptype = "worker";
break;
case TYPE_CONTROLLER:
cptype = "controller";
break;
case TYPE_LMTP:
cptype = "lmtp";
break;
case TYPE_FUZZY:
cptype = "fuzzy";
break;
}
if (function == NULL) {
r = rspamd_snprintf (tmpbuf, sizeof (tmpbuf), "#%P(%s): %s rspamd ", rspamd_log->pid, cptype, timebuf);
}
else {
r = rspamd_snprintf (tmpbuf, sizeof (tmpbuf), "#%P(%s): %s rspamd %s: ", rspamd_log->pid, cptype, timebuf, function);
}
iov[0].iov_base = tmpbuf;
iov[0].iov_len = r;
iov[1].iov_base = (void *)message;
iov[1].iov_len = mlen;
iov[2].iov_base = (void *)&lf_chr;
iov[2].iov_len = 1;
file_log_helper (iov, 3);
}
}
void
rspamd_conditional_debug (uint32_t addr, const char *function, const char *fmt, ...)
{
static char logbuf[BUFSIZ];
va_list vp;
u_char *end;
if (rspamd_log->cfg->log_level >= G_LOG_LEVEL_DEBUG ||
(rspamd_log->debug_ip != NULL && radix32tree_find (rspamd_log->debug_ip, ntohl (addr)) != RADIX_NO_VALUE)) {
va_start (vp, fmt);
end = rspamd_vsnprintf (logbuf, sizeof (logbuf), fmt, vp);
*end = '\0';
va_end (vp);
rspamd_log->log_func (NULL, function, G_LOG_LEVEL_DEBUG, logbuf, TRUE, rspamd_log->cfg);
}
}
void
rspamd_glib_log_function (const gchar *log_domain, GLogLevelFlags log_level, const gchar *message, gpointer arg)
{
if (rspamd_log->enabled) {
rspamd_log->log_func (log_domain, NULL, log_level, message, FALSE, rspamd_log->cfg);
}
}
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