bsc: Add ctrl command to set the TRX ARFCN
diff --git a/openbsc/src/libbsc/bsc_ctrl_commands.c b/openbsc/src/libbsc/bsc_ctrl_commands.c
index 6315c8a..7c8636c 100644
--- a/openbsc/src/libbsc/bsc_ctrl_commands.c
+++ b/openbsc/src/libbsc/bsc_ctrl_commands.c
@@ -237,6 +237,7 @@
 
 	return 0;
 }
+CTRL_CMD_DEFINE_RANGE(trx_arfcn, "arfcn", struct gsm_bts_trx, arfcn, 0, 1023);
 
 static int set_trx_max_power(struct ctrl_cmd *cmd, void *_data)
 {
@@ -275,5 +276,7 @@
 	rc |= ctrl_cmd_install(CTRL_NODE_BTS, &cmd_bts_si);
 
 	rc |= ctrl_cmd_install(CTRL_NODE_TRX, &cmd_trx_max_power);
+	rc |= ctrl_cmd_install(CTRL_NODE_TRX, &cmd_trx_arfcn);
+
 	return rc;
 }
diff --git a/openbsc/tests/ctrl_test_runner.py b/openbsc/tests/ctrl_test_runner.py
index 9858007..c4ffdae 100644
--- a/openbsc/tests/ctrl_test_runner.py
+++ b/openbsc/tests/ctrl_test_runner.py
@@ -246,6 +246,26 @@
         self.assertEquals(r['mtype'], 'ERROR')
         self.assertEquals(r['error'], 'Value must be even')
 
+    def testTrxArfcn(self):
+        r = self.do_get('bts.0.trx.0.arfcn')
+        self.assertEquals(r['mtype'], 'GET_REPLY')
+        self.assertEquals(r['var'], 'bts.0.trx.0.arfcn')
+        self.assertEquals(r['value'], '871')
+
+        r = self.do_set('bts.0.trx.0.arfcn', '873')
+        self.assertEquals(r['mtype'], 'SET_REPLY')
+        self.assertEquals(r['var'], 'bts.0.trx.0.arfcn')
+        self.assertEquals(r['value'], '873')
+
+        r = self.do_get('bts.0.trx.0.arfcn')
+        self.assertEquals(r['mtype'], 'GET_REPLY')
+        self.assertEquals(r['var'], 'bts.0.trx.0.arfcn')
+        self.assertEquals(r['value'], '873')
+
+        r = self.do_set('bts.0.trx.0.arfcn', '2000')
+        self.assertEquals(r['mtype'], 'ERROR')
+        self.assertEquals(r['error'], 'Input not within the range')
+
     def testRfLock(self):
         r = self.do_get('bts.0.rf_state')
         self.assertEquals(r['mtype'], 'GET_REPLY')