added configuration of gains in openzap.conf and display through CLI

libs/freetdm/mod_freetdm/mod_freetdm.c

@@ -2767,6 +2767,8 @@ void dump_chan(ftdm_span_t *span, uint32_t chan_id, switch_stream_handle_t *stre
 						   "type: %s\n"
 						   "state: %s\n"
 						   "last_state: %s\n"
+						   "txgain: %3.2f\n"
+						   "rxgain: %3.2f\n"
 						   "cid_date: %s\n"
 						   "cid_name: %s\n"
 						   "cid_num: %s\n"
@@ -2782,6 +2784,8 @@ void dump_chan(ftdm_span_t *span, uint32_t chan_id, switch_stream_handle_t *stre
 						   ftdm_chan_type2str(span->channels[chan_id]->type),
 						   ftdm_channel_state2str(span->channels[chan_id]->state),
 						   ftdm_channel_state2str(span->channels[chan_id]->last_state),
+						   span->channels[chan_id]->txgain,
+						   span->channels[chan_id]->rxgain,
 						   span->channels[chan_id]->caller_data.cid_date,
 						   span->channels[chan_id]->caller_data.cid_name,
 						   span->channels[chan_id]->caller_data.cid_num.digits,
@@ -2808,6 +2812,8 @@ void dump_chan_xml(ftdm_span_t *span, uint32_t chan_id, switch_stream_handle_t *
 						   "  <type>%s</type>\n"
 						   "  <state>%s</state>\n"
 						   "  <last-state>%s</last-state>\n"
+						   "  <txgain>%3.2f</txgain>\n"
+						   "  <rxgain>%3.2f</rxgain>\n"
 						   "  <cid-date>%s</cid-date>\n"
 						   "  <cid-name>%s</cid-name>\n"
 						   "  <cid-num>%s</cid-num>\n"
@@ -2824,6 +2830,8 @@ void dump_chan_xml(ftdm_span_t *span, uint32_t chan_id, switch_stream_handle_t *
 						   ftdm_chan_type2str(span->channels[chan_id]->type),
 						   ftdm_channel_state2str(span->channels[chan_id]->state),
 						   ftdm_channel_state2str(span->channels[chan_id]->last_state),
+						   span->channels[chan_id]->txgain,
+						   span->channels[chan_id]->rxgain,
 						   span->channels[chan_id]->caller_data.cid_date,
 						   span->channels[chan_id]->caller_data.cid_name,
 						   span->channels[chan_id]->caller_data.cid_num.digits,

libs/freetdm/src/ftdm_io.c

@@ -2034,7 +2034,6 @@ FT_DECLARE(ftdm_status_t) ftdm_channel_command(ftdm_channel_t *ftdmchan, ftdm_co
 		}
 		break;
 
-	/* FIXME: validate user gain values */
 	case FTDM_COMMAND_SET_RX_GAIN:
 		{
 			ftdmchan->rxgain = FTDM_COMMAND_OBJ_FLOAT;
@@ -2826,6 +2825,24 @@ FT_DECLARE(char *) ftdm_api_execute(const char *type, const char *cmd)
 	return rval;
 }
 
+static void ftdm_set_channels_gains(ftdm_span_t *span, int currindex, float rxgain, float txgain)
+{
+	unsigned chan_index = 0;
+
+	if (!span->chan_count) {
+		return;
+	}
+
+	for (chan_index = currindex+1; chan_index <= span->chan_count; chan_index++) {
+		if (!FTDM_IS_VOICE_CHANNEL(span->channels[chan_index])) {
+			continue;
+		}
+		ftdm_channel_command(span->channels[chan_index], FTDM_COMMAND_SET_RX_GAIN, &rxgain);
+		ftdm_channel_command(span->channels[chan_index], FTDM_COMMAND_SET_TX_GAIN, &txgain);
+	}
+}
+
+
 
 static ftdm_status_t ftdm_group_add_channels(const char* name, ftdm_span_t* span, int currindex);
 static ftdm_status_t load_config(void)
@@ -2842,6 +2859,8 @@ static ftdm_status_t load_config(void)
 	char group_name[80] = "default";
 	ftdm_io_interface_t *fio = NULL;
 	ftdm_analog_start_type_t tmp;
+	float rxgain = 0.0;
+	float txgain = 0.0;
 	ftdm_size_t len = 0;
 
 	if (!ftdm_config_open_file(&cfg, cfg_name)) {
@@ -2949,6 +2968,7 @@ static ftdm_status_t load_config(void)
 				if (span->trunk_type == FTDM_TRUNK_FXO) {
 					currindex = span->chan_count;
 					configured += fio->configure_span(span, val, FTDM_CHAN_TYPE_FXO, name, number);
+					ftdm_set_channels_gains(span, currindex, rxgain, txgain);
 					ftdm_group_add_channels(group_name, span, currindex);
 				} else {
 					ftdm_log(FTDM_LOG_WARNING, "Cannot add FXO channels to an FXS trunk!\n");
@@ -2962,6 +2982,7 @@ static ftdm_status_t load_config(void)
 				if (span->trunk_type == FTDM_TRUNK_FXS) {
 					currindex = span->chan_count;
 					configured += fio->configure_span(span, val, FTDM_CHAN_TYPE_FXS, name, number);
+					ftdm_set_channels_gains(span, currindex, rxgain, txgain);
 					ftdm_group_add_channels(group_name, span, currindex);
 				} else {
 					ftdm_log(FTDM_LOG_WARNING, "Cannot add FXS channels to an FXO trunk!\n");
@@ -2975,6 +2996,7 @@ static ftdm_status_t load_config(void)
 				if (span->trunk_type == FTDM_TRUNK_EM) {
 					currindex = span->chan_count;
 					configured += fio->configure_span(span, val, FTDM_CHAN_TYPE_EM, name, number);
+					ftdm_set_channels_gains(span, currindex, rxgain, txgain);
 					ftdm_group_add_channels(group_name, span, currindex);
 				} else {
 					ftdm_log(FTDM_LOG_WARNING, "Cannot add EM channels to a non-EM trunk!\n");
@@ -2982,6 +3004,7 @@ static ftdm_status_t load_config(void)
 			} else if (!strcasecmp(var, "b-channel")) {
 				currindex = span->chan_count;
 				configured += fio->configure_span(span, val, FTDM_CHAN_TYPE_B, name, number);
+				ftdm_set_channels_gains(span, currindex, rxgain, txgain);
 				ftdm_group_add_channels(group_name, span, currindex);
 			} else if (!strcasecmp(var, "d-channel")) {
 				if (d) {
@@ -3000,10 +3023,19 @@ static ftdm_status_t load_config(void)
 			} else if (!strcasecmp(var, "cas-channel")) {
 				currindex = span->chan_count;
 				configured += fio->configure_span(span, val, FTDM_CHAN_TYPE_CAS, name, number);	
+				ftdm_set_channels_gains(span, currindex, rxgain, txgain);
 				ftdm_group_add_channels(group_name, span, currindex);
 			} else if (!strcasecmp(var, "dtmf_hangup")) {
 				span->dtmf_hangup = ftdm_strdup(val);
 				span->dtmf_hangup_len = strlen(val);
+			} else if (!strcasecmp(var, "txgain")) {
+				if (sscanf(val, "%f", &txgain) != 1) {
+					ftdm_log(FTDM_LOG_ERROR, "invalid txgain: '%s'\n", val);
+				}
+			} else if (!strcasecmp(var, "rxgain")) {
+				if (sscanf(val, "%f", &rxgain) != 1) {
+					ftdm_log(FTDM_LOG_ERROR, "invalid rxgain: '%s'\n", val);
+				}
 			} else if (!strcasecmp(var, "group")) {
 				len = strlen(val);
 				if (len >= sizeof(group_name)) {