MT#61856 control_ng: substitute switch lookup

With the newly introduced `ng_command_find()` lookup func.
Add the local `ng_command_def` and maintain via it.

Check whether:
- the handler has been defined
- the handler gets properly selected
- the command is defined (known)

Accordingly update the opmode of the command context.
By default define as `OP_OTHER` always.

For the case when no handler has been defined, introduce
the error reply "No handler found".

Accordingly trigger selected handler after
the command was found.

The main payoff here is that the command processing
flow becomes quite transparent and easy to maintain:
- parse command string
- lookup command definition
- set opmode from table
- call uniform handler
- shared error/success reply handling for all commands

Deprecate strhash based `__csh_lookup()`/`CSH_LOOKUP()`.
Accordingly adap the daemons's and tests Makefile,
remove the strhash objects with the normal control_ng one.

Additionally:
introduce the special `resultstr = "pong"` for the
ping command case, because all other commands have "ok".

Change-Id: Ifff7d7f61ae4d25fd220460f4485d794c9a7cbd5

Author: zenichev

daemon/Makefile

@@ -75,7 +75,7 @@ CFLAGS += $(CFLAGS_MQTT)
 LDLIBS += $(LDLIBS_MQTT)
 
 SRCS := main.c kernel.c helpers.c control_tcp.c call.c control_udp.c redis.c \
-		cookie_cache.c udp_listener.c control_ng_flags_parser.c control_ng.strhash.c sdp.strhash.c stun.c rtcp.c \
+		cookie_cache.c udp_listener.c control_ng_flags_parser.c control_ng.c sdp.strhash.c stun.c rtcp.c \
 		crypto.c rtp.c call_interfaces.c dtls.c log.c cli.strhash.c graphite.c ice.c \
 		media_socket.c homer.c recording.c statistics.c cdr.c ssrc.c iptables.c tcp_listener.c \
 		codec.c load.c dtmf.c timerthread.c media_player.c jitter_buffer.c t38.c websocket.c \

daemon/control_ng.c

@@ -732,6 +732,7 @@ static void control_ng_process_payload(ng_ctx *hctx, str *reply, str *data, cons
 		struct ng_buffer **ngbufp)
 {
 	str cmd = STR_NULL;
+	const struct ng_command_def *cmd_def;
 	const char *errstr, *resultstr;
 	GString *log_str;
 	int64_t cmd_start, cmd_stop, cmd_process_time = {0};
@@ -817,144 +818,32 @@ static void control_ng_process_payload(ng_ctx *hctx, str *reply, str *data, cons
 	// start command timer
 	cmd_start = now_us();
 
-	switch (__csh_lookup(&cmd)) {
-		case CSH_LOOKUP("ping"):
-			resultstr = "pong";
-			command_ctx.opmode = OP_PING;
-			break;
-		case CSH_LOOKUP("offer"):
-			command_ctx.opmode = OP_OFFER;
-			errstr = call_offer_ng(&command_ctx, addr);
-			break;
-		case CSH_LOOKUP("answer"):
-			command_ctx.opmode = OP_ANSWER;
-			errstr = call_answer_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("delete"):
-			command_ctx.opmode = OP_DELETE;
-			errstr = call_delete_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("query"):
-			command_ctx.opmode = OP_QUERY;
-			errstr = call_query_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("list"):
-			command_ctx.opmode = OP_LIST;
-			errstr = call_list_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("start recording"):
-			command_ctx.opmode = OP_START_RECORDING;
-			errstr = call_start_recording_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("stop recording"):
-			command_ctx.opmode = OP_STOP_RECORDING;
-			errstr = call_stop_recording_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("pause recording"):
-			command_ctx.opmode = OP_PAUSE_RECORDING;
-			errstr = call_pause_recording_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("start forwarding"):
-			command_ctx.opmode = OP_START_FORWARDING;
-			errstr = call_start_forwarding_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("stop forwarding"):
-			command_ctx.opmode = OP_STOP_FORWARDING;
-			errstr = call_stop_forwarding_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("block DTMF"):
-			command_ctx.opmode = OP_BLOCK_DTMF;
-			errstr = call_block_dtmf_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("unblock DTMF"):
-			command_ctx.opmode = OP_UNBLOCK_DTMF;
-			errstr = call_unblock_dtmf_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("block media"):
-			command_ctx.opmode = OP_BLOCK_MEDIA;
-			errstr = call_block_media_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("unblock media"):
-			command_ctx.opmode = OP_UNBLOCK_MEDIA;
-			errstr = call_unblock_media_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("silence media"):
-			command_ctx.opmode = OP_SILENCE_MEDIA;
-			errstr = call_silence_media_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("unsilence media"):
-			command_ctx.opmode = OP_UNSILENCE_MEDIA;
-			errstr = call_unsilence_media_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("play media"):
-			command_ctx.opmode = OP_PLAY_MEDIA;
-			errstr = call_play_media_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("stop media"):
-			command_ctx.opmode = OP_STOP_MEDIA;
-			errstr = call_stop_media_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("play DTMF"):
-			command_ctx.opmode = OP_PLAY_DTMF;
-			errstr = call_play_dtmf_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("statistics"):
-			command_ctx.opmode = OP_STATISTICS;
-			errstr = statistics_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("publish"):
-			command_ctx.opmode = OP_PUBLISH;
-			errstr = call_publish_ng(&command_ctx, addr);
-			break;
-		case CSH_LOOKUP("subscribe request"):
-			command_ctx.opmode = OP_SUBSCRIBE_REQ;
-			errstr = call_subscribe_request_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("subscribe answer"):
-			command_ctx.opmode = OP_SUBSCRIBE_ANS;
-			errstr = call_subscribe_answer_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("unsubscribe"):
-			command_ctx.opmode = OP_UNSUBSCRIBE;
-			errstr = call_unsubscribe_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("inject start"):
-			command_ctx.opmode = OP_INJECT_START;
-			errstr = call_inject_start_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("inject stop"):
-			command_ctx.opmode = OP_INJECT_STOP;
-			errstr = call_inject_stop_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("connect"):
-			command_ctx.opmode = OP_CONNECT;
-			errstr = call_connect_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("cli"):
-		case CSH_LOOKUP("CLI"):
-			command_ctx.opmode = OP_CLI;
-			errstr = cli_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("transform"):
-			command_ctx.opmode = OP_TRANSFORM;
-			errstr = call_transform_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("create"):
-			command_ctx.opmode = OP_CREATE;
-			errstr = call_create_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("create answer"):
-			command_ctx.opmode = OP_CREATE_ANSWER;
-			errstr = call_create_answer_ng(&command_ctx);
-			break;
-		case CSH_LOOKUP("mesh"):
-			command_ctx.opmode = OP_MESH;
-			errstr = call_mesh_ng(&command_ctx);
-			break;
-		default:
-			errstr = "Unrecognized command";
+	command_ctx.opmode = OP_OTHER;
+	cmd_def = ng_command_find(&cmd);
+
+	/* undefined command */
+	if (!cmd_def) {
+		errstr = "Unrecognized command";
+		goto err_send;
 	}
 
+	/* No handler found */
+	if (!cmd_def->handler && !cmd_def->addr_handler) {
+		errstr = "No command handler";
+		goto err_send;
+	}
+
+	command_ctx.opmode = cmd_def->opmode;
+	/* ping has special response string */
+	if (cmd_def->opmode == OP_PING)
+		resultstr = "pong";
+
+	/* properly select the handler to be used (single-/double-parameter) */
+	if (cmd_def->addr_handler)
+		errstr = cmd_def->addr_handler(&command_ctx, addr);
+	else
+		errstr = cmd_def->handler(&command_ctx);
+
 	CH(homer_fill_values, hctx, &callid, command_ctx.opmode);
 	CH(homer_trace_msg_in, hctx, data);
 

t/Makefile

@@ -347,7 +347,7 @@ test-stats:	test-stats.o \
 	../daemon/cli.strhash.o \
 	../daemon/codec.o \
 	../daemon/control_ng_flags_parser.o \
-	../daemon/control_ng.strhash.o \
+	../daemon/control_ng.o \
 	../daemon/cookie_cache.o \
 	../daemon/crypto.o \
 	../daemon/dtls.o  \
@@ -407,7 +407,7 @@ test-transcode:	test-transcode.o \
 	../daemon/cli.strhash.o \
 	../daemon/codec.o \
 	../daemon/control_ng_flags_parser.o \
-	../daemon/control_ng.strhash.o \
+	../daemon/control_ng.o \
 	../daemon/cookie_cache.o \
 	../daemon/crypto.o \
 	../daemon/dtls.o \