security_events: Push out security events over AMI events

Security Events will now be written to any listener of the new 'security' class

Review: https://reviewboard.asterisk.org/r/2998/
........

Merged revisions 402584 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@402585 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CHANGES

@@ -579,6 +579,9 @@ AMI (Asterisk Manager Interface)
    They contain information about the transfer that just completed, including
    the location of the transfered channel.
 
+ * Added a 'security' class to AMI which outputs the required fields for
+   security messages similar to the log messages from res_security_log
+
 CDR (Call Detail Records)
 ------------------
  * Significant changes have been made to the behavior of CDRs. The CDR engine

configs/manager.conf.sample

@@ -147,6 +147,7 @@ bindaddr = 0.0.0.0
 ; test      - Ability to read TestEvent notifications sent to the Asterisk Test
 ;             Suite.  Note that this is only enabled when the TEST_FRAMEWORK
 ;             compiler flag is defined.
+; security  - Security Events.  Read-only.
 ; message   - Permissions to send out of call messages. Write-only
 ;
 ;read = system,call,log,verbose,agent,user,config,dtmf,reporting,cdr,dialplan

include/asterisk/manager.h

@@ -86,6 +86,7 @@
 #define EVENT_FLAG_CC               (1 << 15) /* Call Completion events */
 #define EVENT_FLAG_AOC              (1 << 16) /* Advice Of Charge events */
 #define EVENT_FLAG_TEST             (1 << 17) /* Test event used to signal the Asterisk Test Suite */
+#define EVENT_FLAG_SECURITY         (1 << 18) /* Security Message as AMI Event */
 /*XXX Why shifted by 30? XXX */
 #define EVENT_FLAG_MESSAGE          (1 << 30) /* MESSAGE events. */
 /*@} */

main/manager.c

@@ -1129,6 +1129,9 @@ static struct stasis_message_router *stasis_router;
 /*! \brief The \ref stasis_subscription for forwarding the RTP topic to the AMI topic */
 static struct stasis_forward *rtp_topic_forwarder;
 
+/*! \brief The \ref stasis_subscription for forwarding the Security topic to the AMI topic */
+static struct stasis_forward *security_topic_forwarder;
+
 #define MGR_SHOW_TERMINAL_WIDTH 80
 
 #define MAX_VARS 128
@@ -1593,6 +1596,7 @@ static const struct permalias {
 	{ EVENT_FLAG_CC, "cc" },
 	{ EVENT_FLAG_AOC, "aoc" },
 	{ EVENT_FLAG_TEST, "test" },
+	{ EVENT_FLAG_SECURITY, "security" },
 	{ EVENT_FLAG_MESSAGE, "message" },
 	{ INT_MAX, "all" },
 	{ 0, "none" },
@@ -7774,6 +7778,8 @@ static void manager_shutdown(void)
 	}
 	stasis_forward_cancel(rtp_topic_forwarder);
 	rtp_topic_forwarder = NULL;
+	stasis_forward_cancel(security_topic_forwarder);
+	security_topic_forwarder = NULL;
 	ao2_cleanup(manager_topic);
 	manager_topic = NULL;
 	STASIS_MESSAGE_TYPE_CLEANUP(ast_manager_get_generic_type);
@@ -7817,6 +7823,11 @@ static int manager_subscriptions_init(void)
 		return -1;
 	}
 
+	security_topic_forwarder = stasis_forward_all(ast_security_topic(), manager_topic);
+	if (!security_topic_forwarder) {
+		return -1;
+	}
+
 	stasis_router = stasis_message_router_create(manager_topic);
 	if (!stasis_router) {
 		return -1;

main/security_events.c

@@ -42,6 +42,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/astobj2.h"
 
 static const size_t TIMESTAMP_STR_LEN = 32;
+static const size_t SECURITY_EVENT_BUF_INIT_LEN = 256;
 
 /*! \brief Security Topic */
 static struct stasis_topic *security_topic;
@@ -51,8 +52,81 @@ struct stasis_topic *ast_security_topic(void)
 	return security_topic;
 }
 
+static int append_event_str_single(struct ast_str **str, struct ast_json *json,
+		const enum ast_event_ie_type ie_type)
+{
+	const char *ie_type_key = ast_event_get_ie_type_name(ie_type);
+	struct ast_json *json_string = ast_json_object_get(json, ie_type_key);
+
+	ast_assert(json_string != NULL);
+
+	if (ast_str_append(str, 0, "%s: %s\r\n", ie_type_key, ast_json_string_get(json_string)) == -1) {
+		return -1;
+	}
+
+	return 0;
+}
+
+static int append_event_str_from_json(struct ast_str **str, struct ast_json *json,
+		const struct ast_security_event_ie_type *ies)
+{
+	unsigned int i;
+
+	for (i = 0; ies[i].ie_type != AST_EVENT_IE_END; i++) {
+		if (append_event_str_single(str, json, ies[i].ie_type)) {
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static struct ast_manager_event_blob *security_event_to_ami_blob(struct ast_json *json)
+{
+	RAII_VAR(struct ast_str *, str, NULL, ast_free);
+	struct ast_json *event_type_json;
+	enum ast_security_event_type event_type;
+
+	event_type_json = ast_json_object_get(json, "SecurityEvent");
+	event_type = ast_json_integer_get(event_type_json);
+
+	ast_assert(event_type >= 0 && event_type < AST_SECURITY_EVENT_NUM_TYPES);
+
+	if (!(str = ast_str_create(SECURITY_EVENT_BUF_INIT_LEN))) {
+		return NULL;
+	}
+
+	if (append_event_str_from_json(&str, json,
+			ast_security_event_get_required_ies(event_type))) {
+		ast_log(LOG_ERROR, "Failed to issue a security event to AMI.\n");
+		return NULL;
+	}
+
+	return ast_manager_event_blob_create(EVENT_FLAG_SECURITY,
+		ast_security_event_get_name(event_type),
+		"%s",
+		ast_str_buffer(str));
+}
+
+static struct ast_manager_event_blob *security_event_to_ami(struct stasis_message *message)
+{
+	struct ast_json_payload *payload = stasis_message_data(message);
+
+	if (stasis_message_type(message) != ast_security_event_type()) {
+		return NULL;
+	}
+
+	if (!payload) {
+		return NULL;
+	}
+
+	return security_event_to_ami_blob(payload->json);
+}
+
 /*! \brief Message type for security events */
-STASIS_MESSAGE_TYPE_DEFN(ast_security_event_type);
+STASIS_MESSAGE_TYPE_DEFN(ast_security_event_type,
+	.to_ami = security_event_to_ami,
+	);
 
 static void security_stasis_cleanup(void)
 {