/******************************************************************************
* *
* Function: main_snmptrapper_loop *
* *
* Purpose: SNMP trap reader's entry point *
* *
* Author: Rudolfs Kreicbergs *
* *
******************************************************************************/
void main_snmptrapper_loop()
{
const char *__function_name = "main_snmptrapper_loop";
zabbix_log(LOG_LEVEL_DEBUG, "In %s() trapfile:'%s'", __function_name, CONFIG_SNMPTRAP_FILE);
zbx_setproctitle("%s [connecting to the database]", get_process_type_string(process_type));
DBconnect(ZBX_DB_CONNECT_NORMAL);
DBget_lastsize();
for (;;)
{
zbx_setproctitle("%s [processing data]", get_process_type_string(process_type));
while (SUCCEED == get_latest_data())
read_traps();
zbx_sleep_loop(1);
}
if (-1 != trap_fd)
close(trap_fd);
}
/******************************************************************************
* *
* Function: get_latest_data *
* *
* Purpose: Open the latest trap file. If the current file has been rotated, *
* process that and then open the latest file. *
* *
* Return value: SUCCEED - there are new traps to be parsed *
* FAIL - there are no new traps or trap file does not exist *
* *
* Author: Rudolfs Kreicbergs *
* *
******************************************************************************/
static int get_latest_data()
{
struct stat file_buf;
if (-1 != trap_fd) /* a trap file is already open */
{
if (0 != stat(CONFIG_SNMPTRAP_FILE, &file_buf))
{
/* file might have been renamed or deleted, process the current file */
if (ENOENT != errno)
{
zabbix_log(LOG_LEVEL_CRIT, "cannot stat [%s]: %s",
CONFIG_SNMPTRAP_FILE, zbx_strerror(errno));
}
read_traps();
close_trap_file();
}
else if (file_buf.st_ino != trap_ino || file_buf.st_size < trap_lastsize)
{
/* file has been rotated, process the current file */
read_traps();
close_trap_file();
}
else if (file_buf.st_size == trap_lastsize)
{
return FAIL; /* no new traps */
}
}
if (-1 == trap_fd && -1 == open_trap_file())
return FAIL;
return SUCCEED;
}
/******************************************************************************
* *
* Function: main_snmptrapper_loop *
* *
* Purpose: SNMP trap reader's entry point *
* *
* Author: Rudolfs Kreicbergs *
* *
******************************************************************************/
ZBX_THREAD_ENTRY(snmptrapper_thread, args)
{
const char *__function_name = "main_snmptrapper_loop";
double sec;
process_type = ((zbx_thread_args_t *)args)->process_type;
server_num = ((zbx_thread_args_t *)args)->server_num;
process_num = ((zbx_thread_args_t *)args)->process_num;
zabbix_log(LOG_LEVEL_INFORMATION, "%s #%d started [%s #%d]", get_program_type_string(program_type),
server_num, get_process_type_string(process_type), process_num);
zabbix_log(LOG_LEVEL_DEBUG, "In %s() trapfile:'%s'", __function_name, CONFIG_SNMPTRAP_FILE);
zbx_setproctitle("%s [connecting to the database]", get_process_type_string(process_type));
DBconnect(ZBX_DB_CONNECT_NORMAL);
DBget_lastsize();
buffer = zbx_malloc(buffer, MAX_BUFFER_LEN);
*buffer = '\0';
for (;;)
{
zbx_handle_log();
zbx_setproctitle("%s [processing data]", get_process_type_string(process_type));
sec = zbx_time();
while (SUCCEED == get_latest_data())
read_traps();
sec = zbx_time() - sec;
zbx_setproctitle("%s [processed data in " ZBX_FS_DBL " sec, idle 1 sec]",
get_process_type_string(process_type), sec);
zbx_sleep_loop(1);
}
zbx_free(buffer);
if (-1 != trap_fd)
close(trap_fd);
}
/******************************************************************************
* *
* Function: get_latest_data *
* *
* Purpose: Open the latest trap file. If the current file has been rotated, *
* process that and then open the latest file. *
* *
* Return value: SUCCEED - there are new traps to be parsed *
* FAIL - there are no new traps or trap file does not exist *
* *
* Author: Rudolfs Kreicbergs *
* *
******************************************************************************/
static int get_latest_data()
{
zbx_stat_t file_buf;
if (-1 != trap_fd) /* a trap file is already open */
{
if (0 != zbx_stat(CONFIG_SNMPTRAP_FILE, &file_buf))
{
/* file might have been renamed or deleted, process the current file */
if (ENOENT != errno)
{
zabbix_log(LOG_LEVEL_CRIT, "cannot stat SNMP trapper file \"%s\": %s",
CONFIG_SNMPTRAP_FILE, zbx_strerror(errno));
}
while (0 < read_traps())
;
if (0 != offset)
parse_traps(1);
close_trap_file();
}
else if (ZBX_SNMP_TRAPFILE_MAX_SIZE <= (zbx_uint64_t)file_buf.st_size)
{
close_trap_file();
}
else if (file_buf.st_ino != trap_ino || file_buf.st_size < trap_lastsize)
{
/* file has been rotated, process the current file */
while (0 < read_traps())
;
if (0 != offset)
parse_traps(1);
close_trap_file();
}
else if (file_buf.st_size == trap_lastsize)
{
if (1 == force)
{
parse_traps(1);
force = 0;
}
else if (0 != offset && 0 == force)
{
force = 1;
}
return FAIL; /* no new traps */
}
}
force = 0;
if (-1 == trap_fd && -1 == open_trap_file())
return FAIL;
return SUCCEED;
}
