Refactor CEL channel events on top of Stasis-Core

This uses the channel state change events from Stasis-Core to determine
when channel-related CEL events should be raised. Those refactored in
this patch are:
* AST_CEL_CHANNEL_START
* AST_CEL_ANSWER
* AST_CEL_APP_START
* AST_CEL_APP_END
* AST_CEL_HANGUP
* AST_CEL_CHANNEL_END

Retirement of Linked IDs is also refactored.

CEL configuration has been refactored to use the config framework.

Note: Some HANGUP events are not generated correctly because the bridge
layer does not propagate hangupcause/hangupsource information yet.

Review: https://reviewboard.asterisk.org/r/2544/
(closes issue ASTERISK-21563)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@391622 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/config_options.h

@@ -146,10 +146,11 @@ typedef void *(*aco_snapshot_alloc)(void);
 
 /*! \brief The representation of a single configuration file to be processed */
 struct aco_file {
-	const char *filename; /*!< \brief The filename to be processed */
-	const char *alias;    /*!< \brief An alias filename to be tried if 'filename' cannot be found */
-	const char **preload; /*!< \brief A null-terminated oredered array of categories to be loaded first */
-	struct aco_type *types[]; /*!< The list of types for this config. Required. Use a sentinel! */
+	const char *filename;       /*!< The filename to be processed */
+	const char *alias;          /*!< An alias filename to be tried if 'filename' cannot be found */
+	const char **preload;       /*!< A null-terminated ordered array of categories to be loaded first */
+	const char *skip_category;  /*!< A regular expression of categories to skip in the file. Use when a file is processed by multiple modules */
+	struct aco_type *types[];   /*!< The list of types for this config. Required. Use a sentinel! */
 };
 
 struct aco_info {

include/asterisk/stasis_bridging.h

@@ -45,6 +45,8 @@ struct ast_bridge_snapshot {
 	struct ao2_container *channels;
 	/*! Bridge flags to tweak behavior */
 	struct ast_flags feature_flags;
+	/*! Bridge capabilities */
+	uint32_t capabilities;
 	/*! Number of channels participating in the bridge */
 	unsigned int num_channels;
 	/*! Number of active channels in the bridge. */

include/asterisk/stasis_channels.h

@@ -52,6 +52,9 @@ struct ast_channel_snapshot {
 		AST_STRING_FIELD(exten);		/*!< Dialplan: Current extension number */
 		AST_STRING_FIELD(caller_name);		/*!< Caller ID Name */
 		AST_STRING_FIELD(caller_number);	/*!< Caller ID Number */
+		AST_STRING_FIELD(caller_ani);		/*!< Caller ID ANI Number */
+		AST_STRING_FIELD(caller_rdnis);		/*!< Caller ID RDNIS Number */
+		AST_STRING_FIELD(caller_dnid);		/*!< Caller ID DNID Number */
 		AST_STRING_FIELD(connected_name);	/*!< Connected Line Name */
 		AST_STRING_FIELD(connected_number);	/*!< Connected Line Number */
 		AST_STRING_FIELD(language);		/*!< The default spoken language for the channel */

include/asterisk/strings.h

@@ -1067,4 +1067,46 @@ static force_inline int attribute_pure ast_str_case_hash(const char *str)
 	return abs(hash);
 }
 
+/*!
+ * \brief Convert a string to all lower-case
+ *
+ * \param str The string to be converted to lower case
+ *
+ * \retval str for convenience
+ */
+static force_inline char *attribute_pure ast_str_to_lower(char *str)
+{
+	char *str_orig = str;
+	if (!str) {
+		return str;
+	}
+
+	for (; *str; ++str) {
+		*str = tolower(*str);
+	}
+
+	return str_orig;
+}
+
+/*!
+ * \brief Convert a string to all upper-case
+ *
+ * \param str The string to be converted to upper case
+ *
+ * \retval str for convenience
+ */
+static force_inline char *attribute_pure ast_str_to_upper(char *str)
+{
+	char *str_orig = str;
+	if (!str) {
+		return str;
+	}
+
+	for (; *str; ++str) {
+		*str = toupper(*str);
+	}
+
+	return str_orig;
+}
+
 #endif /* _ASTERISK_STRINGS_H */