Merge pull request #738 in FS/freeswitch from ~KYCONQUERS/mod_fail2ban:FS-7394-add-mod_fail2ban to master

* commit '4c1e7f24bcac3e6d3b20331a191cf90b0ac0b6fc':
  FS-7394 adding mod_fail2ban into freeswitch repo

build/modules.conf.in

@@ -102,6 +102,7 @@ event_handlers/mod_cdr_sqlite
 #event_handlers/mod_erlang_event
 #event_handlers/mod_event_multicast
 event_handlers/mod_event_socket
+#event_handlers/mod_fail2ban
 #event_handlers/mod_format_cdr
 #event_handlers/mod_json_cdr
 #event_handlers/mod_radius_cdr

configure.ac

@@ -1876,6 +1876,7 @@ AC_CONFIG_FILES([Makefile
 		src/mod/event_handlers/mod_event_multicast/Makefile
 		src/mod/event_handlers/mod_event_socket/Makefile
 		src/mod/event_handlers/mod_event_test/Makefile
+		src/mod/event_handlers/mod_fail2ban/Makefile
 		src/mod/event_handlers/mod_format_cdr/Makefile
 		src/mod/event_handlers/mod_json_cdr/Makefile
 		src/mod/event_handlers/mod_kazoo/Makefile

src/mod/event_handlers/mod_fail2ban/Makefile.am

@@ -0,0 +1,8 @@
+include $(top_srcdir)/build/modmake.rulesam
+MODNAME=mod_fail2ban
+
+mod_LTLIBRARIES = mod_fail2ban.la
+mod_fail2ban_la_SOURCES  = mod_fail2ban.c
+mod_fail2ban_la_CFLAGS   = $(AM_CFLAGS)
+mod_fail2ban_la_LIBADD   = $(switch_builddir)/libfreeswitch.la
+mod_fail2ban_la_LDFLAGS  = -avoid-version -module -no-undefined -shared

src/mod/event_handlers/mod_fail2ban/fail2ban.conf.xml

@@ -0,0 +1,7 @@
+<configuration name="fail2ban.conf" description="fail2ban log configs">
+  <bindings>
+    <config name="settings" desription="configs">
+      <param name="logfile" value="$${log_dir}/fail2ban.log"/>
+    </config>
+  </bindings>
+</configuration>

src/mod/event_handlers/mod_fail2ban/mod_fail2ban.c

@@ -0,0 +1,127 @@
+#include <switch.h>
+
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_fail2ban_shutdown);
+SWITCH_MODULE_LOAD_FUNCTION(mod_fail2ban_load);
+
+SWITCH_MODULE_DEFINITION(mod_fail2ban, mod_fail2ban_load, mod_fail2ban_shutdown, NULL);
+
+static struct {
+	switch_memory_pool_t *modpool;
+	switch_file_t *logfile;
+	char *logfile_name;
+} globals = {0};
+
+
+static switch_status_t mod_fail2ban_do_config(void)
+{
+	switch_status_t status = SWITCH_STATUS_SUCCESS;
+	char *cf = "fail2ban.conf";
+	switch_xml_t cfg, xml, bindings_tag, config = NULL, param = NULL;
+	char *var = NULL, *val = NULL;
+	
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "setting configs\n");		
+
+	if (!(xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Open of %s failed\n", cf);
+		return SWITCH_STATUS_TERM;
+	}
+	
+	if (!(bindings_tag = switch_xml_child(cfg, "bindings"))) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Missing <bindings> tag!\n");
+		goto done;
+	}
+	
+	for (config = switch_xml_child(bindings_tag, "config"); config; config = config->next) {
+		
+		for (param = switch_xml_child(config, "param"); param; param = param->next) {
+			var = (char *) switch_xml_attr_soft(param, "name");
+			val = (char *) switch_xml_attr_soft(param, "value");
+			
+			if (strncmp(var,"logfile", 7) == 0) {
+			  if (zstr(val)) {
+			    globals.logfile_name = switch_core_strdup(globals.modpool, val);
+			  } else {
+			    switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Null or empty Logfile attribute %s: %s\n", var, val);		
+			  }
+			} else {
+			  switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Unknown attribute %s: %s\n", var, val);		
+			}
+		}	
+	}
+	if ( ! globals.logfile_name ) {
+	  switch_core_sprintf(globals.modpool, globals.logfile_name, "%s%s%s", SWITCH_GLOBAL_dirs.log_dir, SWITCH_PATH_SEPARATOR, "fail2ban.log");
+	}
+	
+	if ((status = switch_file_open(&globals.logfile, globals.logfile_name, SWITCH_FOPEN_WRITE|SWITCH_FOPEN_APPEND|SWITCH_FOPEN_CREATE, SWITCH_FPROT_OS_DEFAULT, globals.modpool)) != SWITCH_STATUS_SUCCESS) {
+	  switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "failed to open %s\n", globals.logfile_name);		
+	  status = SWITCH_STATUS_FALSE;
+	} 
+	
+ done:
+	switch_xml_free(xml);
+	
+	return SWITCH_STATUS_SUCCESS;
+}
+
+static int fail2ban_logger(const char *message, char *user, char *ip)
+{
+	if (!globals.logfile) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Could not print to fail2ban log!\n");
+		return -1;
+	}                                                                                                                                            
+	
+	struct tm * timeinfo = localtime(switch_epoch_time_now(NULL));
+	return switch_file_printf(globals.logfile, "%s user[%s] ip[%s] at[%s]\n", message, user, ip, asctime(timeinfo));
+}
+
+static void fail2ban_event_handler(switch_event_t *event)
+{
+	struct tm * timeinfo = localtime(switch_epoch_time_now(NULL));
+	if (event->event_id == SWITCH_EVENT_CUSTOM) {
+		if (strncmp(event->subclass_name, "sofia::register_attempt",23) == 0) {
+			fail2ban_logger("A registration was attempted", switch_event_get_header(event, "to-user"), switch_event_get_header(event, "network-ip"));
+		} else if (strncmp(event->subclass_name, "sofia::register_failure",23) == 0) {
+			fail2ban_logger("A registration failed", switch_event_get_header(event, "to-user"), switch_event_get_header(event, "network-ip"));
+		}
+	}
+}
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_fail2ban_load)
+{
+	switch_status_t status;
+	void *user_data = NULL;
+	*module_interface = switch_loadable_module_create_module_interface(pool, modname);
+	globals.modpool = pool;
+
+	if (mod_fail2ban_do_config() != SWITCH_STATUS_SUCCESS) {
+		return SWITCH_STATUS_FALSE;
+	}
+
+	if ((status = switch_event_bind(modname, SWITCH_EVENT_CUSTOM, SWITCH_EVENT_SUBCLASS_ANY, fail2ban_event_handler, user_data)) != SWITCH_STATUS_SUCCESS) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "event bind failed\n");
+		return SWITCH_STATUS_FALSE;
+	} 
+
+	switch_file_printf(globals.logfile, "Fail2ban was started\n");
+	return SWITCH_STATUS_SUCCESS;
+}
+
+
+SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_fail2ban_shutdown)
+{
+	switch_status_t status;
+
+	if (globals.logfile != NULL) {
+	  switch_file_printf(globals.logfile, "Fail2ban stoping\n");
+	}
+
+	if ((status = switch_event_unbind_callback(fail2ban_event_handler)) != SWITCH_STATUS_SUCCESS) {
+	  switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "event unbind failed\n");
+	}
+
+	if ((status = switch_file_close(globals.logfile)) != SWITCH_STATUS_SUCCESS) {
+	  switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "failed to close %s\n", globals.logfile_name);		
+	}
+	
+	return status;
+}