res/ari/resource_channels.c: Added hangup reason code for channels

Currently, DELETE /ari/channels/<channelID> supports only few hangup reasons.
It's good enough for simple use, but when it needs to set the detail reason,
it comes challenges.
Added reason_code query parameter for that.

ASTERISK-28385

Change-Id: I1cf1d991ffd759d0591b347445a55f416ddc3ff2

res/ari/resource_channels.c

@@ -49,6 +49,40 @@
 #include <limits.h>
 
 
+/*! \brief Return the corresponded hangup code of the given reason */
+static int convert_reason_to_hangup_code(const char* reason)
+{
+	if (!strcmp(reason, "normal")) {
+		return AST_CAUSE_NORMAL;
+	} else if (!strcmp(reason, "busy")) {
+		return AST_CAUSE_BUSY;
+	} else if (!strcmp(reason, "congestion")) {
+		return AST_CAUSE_CONGESTION;
+	} else if (!strcmp(reason, "no_answer")) {
+		return AST_CAUSE_NOANSWER;
+	} else if (!strcmp(reason, "timeout")) {
+		return AST_CAUSE_NO_USER_RESPONSE;
+	} else if (!strcmp(reason, "rejected")) {
+		return AST_CAUSE_CALL_REJECTED;
+	} else if (!strcmp(reason, "unallocated")) {
+		return AST_CAUSE_UNALLOCATED;
+	} else if (!strcmp(reason, "normal_unspecified")) {
+		return AST_CAUSE_NORMAL_UNSPECIFIED;
+	} else if (!strcmp(reason, "number_incomplete")) {
+		return AST_CAUSE_INVALID_NUMBER_FORMAT;
+	} else if (!strcmp(reason, "codec_mismatch")) {
+		return AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
+	} else if (!strcmp(reason, "interworking")) {
+		return AST_CAUSE_INTERWORKING;
+	} else if (!strcmp(reason, "failure")) {
+		return AST_CAUSE_FAILURE;
+	} else if(!strcmp(reason, "answered_elsewhere")) {
+		return AST_CAUSE_ANSWERED_ELSEWHERE;
+	}
+
+	return -1;
+}
+
 /*!
  * \brief Ensure channel is in a state that allows operation to be performed.
  *
@@ -885,39 +919,34 @@ void ast_ari_channels_hangup(struct ast_variable *headers,
 		return;
 	}
 
-	if (ast_strlen_zero(args->reason) || !strcmp(args->reason, "normal")) {
-		cause = AST_CAUSE_NORMAL;
-	} else if (!strcmp(args->reason, "busy")) {
-		cause = AST_CAUSE_BUSY;
-	} else if (!strcmp(args->reason, "congestion")) {
-		cause = AST_CAUSE_CONGESTION;
-	} else if (!strcmp(args->reason, "no_answer")) {
-		cause = AST_CAUSE_NOANSWER;
-	} else if (!strcmp(args->reason, "timeout")) {
-		cause = AST_CAUSE_NO_USER_RESPONSE;
-	} else if (!strcmp(args->reason, "rejected")) {
-		cause = AST_CAUSE_CALL_REJECTED;
-	} else if (!strcmp(args->reason, "unallocated")) {
-		cause = AST_CAUSE_UNALLOCATED;
-	} else if (!strcmp(args->reason, "normal_unspecified")) {
-		cause = AST_CAUSE_NORMAL_UNSPECIFIED;
-	} else if (!strcmp(args->reason, "number_incomplete")) {
-		cause = AST_CAUSE_INVALID_NUMBER_FORMAT;
-	} else if (!strcmp(args->reason, "codec_mismatch")) {
-		cause = AST_CAUSE_BEARERCAPABILITY_NOTAVAIL;
-	} else if (!strcmp(args->reason, "interworking")) {
-		cause = AST_CAUSE_INTERWORKING;
-	} else if (!strcmp(args->reason, "failure")) {
-		cause = AST_CAUSE_FAILURE;
-	} else if(!strcmp(args->reason, "answered_elsewhere")) {
-		cause = AST_CAUSE_ANSWERED_ELSEWHERE;
-	} else {
-		ast_ari_response_error(
-			response, 400, "Invalid Reason",
-			"Invalid reason for hangup provided");
+	if (!ast_strlen_zero(args->reason) && !ast_strlen_zero(args->reason_code)) {
+		ast_ari_response_error(response, 400, "Bad Request",
+			"The reason and reason_code can't both be specified");
 		return;
 	}
 
+	if (!ast_strlen_zero(args->reason_code)) {
+		/* reason_code allows any hangup code */
+		if (sscanf(args->reason_code, "%30d", &cause) != 1) {
+			ast_ari_response_error(
+				response, 400, "Invalid Reason Code",
+				"Invalid reason for hangup reason code provided");
+			return;
+		}
+	} else if (!ast_strlen_zero(args->reason)) {
+		/* reason allows only listed hangup reason */
+		cause = convert_reason_to_hangup_code(args->reason);
+		if (cause == -1) {
+			ast_ari_response_error(
+				response, 400, "Invalid Reason",
+				"Invalid reason for hangup reason provided");
+			return;
+		}
+	} else {
+		/* not specified. set default hangup */
+		cause = AST_CAUSE_NORMAL;
+	}
+
 	ast_channel_hangupcause_set(chan, cause);
 	ast_softhangup(chan, AST_SOFTHANGUP_EXPLICIT);
 

res/ari/resource_channels.h

@@ -207,7 +207,9 @@ void ast_ari_channels_originate_with_id(struct ast_variable *headers, struct ast
 struct ast_ari_channels_hangup_args {
 	/*! Channel's id */
 	const char *channel_id;
-	/*! Reason for hanging up the channel */
+	/*! The reason code for hanging up the channel for detail use. Mutually exclusive with 'reason'. See detail hangup codes at here. https://wiki.asterisk.org/wiki/display/AST/Hangup+Cause+Mappings */
+	const char *reason_code;
+	/*! Reason for hanging up the channel for simple use. Mutually exclusive with 'reason_code'. */
 	const char *reason;
 };
 /*!

res/res_ari_channels.c

@@ -598,6 +598,10 @@ int ast_ari_channels_hangup_parse_body(
 {
 	struct ast_json *field;
 	/* Parse query parameters out of it */
+	field = ast_json_object_get(body, "reason_code");
+	if (field) {
+		args->reason_code = ast_json_string_get(field);
+	}
 	field = ast_json_object_get(body, "reason");
 	if (field) {
 		args->reason = ast_json_string_get(field);
@@ -625,6 +629,9 @@ static void ast_ari_channels_hangup_cb(
 #endif /* AST_DEVMODE */
 
 	for (i = get_params; i; i = i->next) {
+		if (strcmp(i->name, "reason_code") == 0) {
+			args.reason_code = (i->value);
+		} else
 		if (strcmp(i->name, "reason") == 0) {
 			args.reason = (i->value);
 		} else

rest-api/api-docs/channels.json

@@ -406,14 +406,21 @@
 							"allowMultiple": false,
 							"dataType": "string"
 						},
+						{
+							"name": "reason_code",
+							"description": "The reason code for hanging up the channel for detail use. Mutually exclusive with 'reason'. See detail hangup codes at here. https://wiki.asterisk.org/wiki/display/AST/Hangup+Cause+Mappings",
+							"paramType": "query",
+							"required": false,
+							"allowMultiple": false,
+							"dataType": "string"
+						},
 						{
 							"name": "reason",
-							"description": "Reason for hanging up the channel",
+							"description": "Reason for hanging up the channel for simple use. Mutually exclusive with 'reason_code'.",
 							"paramType": "query",
 							"required": false,
 							"allowMultiple": false,
 							"dataType": "string",
-							"defalutValue": "normal",
 							"allowableValues": {
 								"valueType": "LIST",
 								"values": [