freetdm: add support for setting the channel tx/rx queue size from config file (wanpipe.conf) and from CLI

libs/freetdm/conf/wanpipe.conf

@@ -1,4 +1,13 @@
 [defaults]
+; User space interval at which data will be delivered
 codec_ms => 20
+
+; wink and flash interval
 wink_ms => 150
 flash_ms => 750
+
+; size of the driver queue of elements of MTU size
+; typical case is 10 elements of 80 bytes each (10ms of ulaw/alaw)
+; don't mess with this if you don't know what you're doing
+; txqueue_size => 10
+; rxqueue_size => 10

libs/freetdm/mod_freetdm/mod_freetdm.c

@@ -3621,8 +3621,9 @@ void dump_chan_xml(ftdm_span_t *span, uint32_t chan_id, switch_stream_handle_t *
 "ftdm trace <path> <span_id|span_name> [<chan_id>]\n" \
 "ftdm notrace <span_id|span_name> [<chan_id>]\n" \
 "ftdm q931_pcap <span_id> on|off [pcapfilename without suffix]\n" \
-"ftdm gains <txgain> <rxgain> <span_id> [<chan_id>]\n" \
+"ftdm gains <rxgain> <txgain> <span_id> [<chan_id>]\n" \
 "ftdm dtmf on|off <span_id> [<chan_id>]\n" \
+"ftdm queuesize <rxsize> <txsize> <span_id> [<chan_id>]\n" \
 "--------------------------------------------------------------------------------\n"
 SWITCH_STANDARD_API(ft_function)
 {
@@ -4059,7 +4060,7 @@ SWITCH_STANDARD_API(ft_function)
 		ftdm_channel_t *chan;
 		ftdm_span_t *span = NULL;
 		if (argc < 4) {
-			stream->write_function(stream, "-ERR Usage: ft gains <rxgain> <txgain> <span_id> [<chan_id>]\n");
+			stream->write_function(stream, "-ERR Usage: ftdm gains <rxgain> <txgain> <span_id> [<chan_id>]\n");
 			goto end;
 		} 
 		ftdm_span_find_by_name(argv[3], &span);
@@ -4094,6 +4095,50 @@ SWITCH_STANDARD_API(ft_function)
 			}
 		}
 		stream->write_function(stream, "+OK gains set to Rx %f and Tx %f\n", rxgain, txgain);
+	} else if (!strcasecmp(argv[0], "queuesize")) {
+		unsigned int i = 0;
+		uint32_t rxsize = 10;
+		uint32_t txsize = 10;
+		uint32_t chan_id = 0;
+		uint32_t ccount = 0;
+		ftdm_channel_t *chan;
+		ftdm_span_t *span = NULL;
+		if (argc < 4) {
+			stream->write_function(stream, "-ERR Usage: ftdm queuesize <rxsize> <txsize> <span_id> [<chan_id>]\n");
+			goto end;
+		} 
+		ftdm_span_find_by_name(argv[3], &span);
+		if (!span) {
+			stream->write_function(stream, "-ERR invalid span\n");
+			goto end;
+		}
+		if (argc > 4) {
+			chan_id = atoi(argv[4]);
+			if (chan_id > ftdm_span_get_chan_count(span)) {
+				stream->write_function(stream, "-ERR invalid chan\n");
+				goto end;
+			}
+		}
+		i = sscanf(argv[1], "%u", &rxsize);
+		i += sscanf(argv[2], "%u", &txsize);
+		if (i != 2) {
+			stream->write_function(stream, "-ERR invalid queue sizes provided\n");
+			goto end;
+		}
+
+		if (chan_id) {
+			chan = ftdm_span_get_channel(span, chan_id);
+			ftdm_channel_command(chan, FTDM_COMMAND_SET_RX_QUEUE_SIZE, &rxsize);
+			ftdm_channel_command(chan, FTDM_COMMAND_SET_TX_QUEUE_SIZE, &txsize);
+		} else {
+			ccount = ftdm_span_get_chan_count(span);
+			for (i = 1; i < ccount; i++) {
+				chan = ftdm_span_get_channel(span, i);
+				ftdm_channel_command(chan, FTDM_COMMAND_SET_RX_QUEUE_SIZE, &rxsize);
+				ftdm_channel_command(chan, FTDM_COMMAND_SET_TX_QUEUE_SIZE, &txsize);
+			}
+		}
+		stream->write_function(stream, "+OK queue sizes set to Rx %d and Tx %d\n", rxsize, txsize);
 	} else if (!strcasecmp(argv[0], "restart")) {
 		uint32_t chan_id = 0;
 		ftdm_channel_t *chan;

libs/freetdm/src/ftmod/ftmod_wanpipe/ftmod_wanpipe.c

@@ -91,6 +91,8 @@ typedef enum {
  */
 static struct {
 	uint32_t codec_ms;
+	uint32_t rxqueue_size;
+	uint32_t txqueue_size;
 	uint32_t wink_ms;
 	uint32_t flash_ms;
 	uint32_t ring_on_ms;
@@ -406,6 +408,20 @@ static FIO_CONFIGURE_FUNCTION(wanpipe_configure)
 			} else {
 				wp_globals.codec_ms = num;
 			}
+		} else if (!strcasecmp(var, "rxqueue_size")) {
+			num = atoi(val);
+			if (num < 1 || num > 1000) {
+				ftdm_log(FTDM_LOG_WARNING, "invalid rx queue size at line %d\n", lineno);
+			} else {
+				wp_globals.rxqueue_size = num;
+			}
+		} else if (!strcasecmp(var, "txqueue_size")) {
+			num = atoi(val);
+			if (num < 1 || num > 1000) {
+				ftdm_log(FTDM_LOG_WARNING, "invalid tx queue size at line %d\n", lineno);
+			} else {
+				wp_globals.txqueue_size = num;
+			}
 		} else if (!strcasecmp(var, "wink_ms")) {
 			num = atoi(val);
 			if (num < 50 || num > 3000) {
@@ -544,6 +560,13 @@ static FIO_OPEN_FUNCTION(wanpipe_open)
 		ftdm_channel_set_feature(ftdmchan, FTDM_CHANNEL_FEATURE_INTERVAL);
 		ftdmchan->effective_interval = ftdmchan->native_interval = wp_globals.codec_ms;
 		ftdmchan->packet_len = ftdmchan->native_interval * 8;
+
+		if (wp_globals.txqueue_size > 0) {
+			ftdm_channel_command(ftdmchan, FTDM_COMMAND_SET_TX_QUEUE_SIZE, &wp_globals.txqueue_size);
+		}
+		if (wp_globals.rxqueue_size > 0) {
+			ftdm_channel_command(ftdmchan, FTDM_COMMAND_SET_RX_QUEUE_SIZE, &wp_globals.rxqueue_size);
+		}
 	}
 
 	return FTDM_SUCCESS;
@@ -1573,6 +1596,9 @@ static FIO_IO_LOAD_FUNCTION(wanpipe_init)
 	wp_globals.flash_ms = 750;
 	wp_globals.ring_on_ms = 2000;
 	wp_globals.ring_off_ms = 4000;
+	/* 0 for queue size will leave driver defaults */
+	wp_globals.txqueue_size = 0;
+	wp_globals.rxqueue_size = 0;
 	wanpipe_interface.name = "wanpipe";
 	wanpipe_interface.configure_span = wanpipe_configure_span;
 	wanpipe_interface.configure = wanpipe_configure;