Close tests on that have have been running longer than test duration.

- Iperf server now cancels tests that have been left running for longer than duration requested by the client. This can occur in cases where client has sudden network loss and control connection is left in lingering state.

src/iperf_server_api.c

@@ -312,6 +312,19 @@ iperf_test_reset(struct iperf_test *test)
     memset(test->cookie, 0, COOKIE_SIZE); 
 }
 
+static void
+server_timer_proc(TimerClientData client_data, struct timeval *nowP)
+{
+    struct iperf_test *test = client_data.p;
+
+    test->timer = NULL;
+    if (test->done)
+        return;
+    test->done = 1;
+    close(test->ctrl_sck);
+}
+
+
 static void
 server_stats_timer_proc(TimerClientData client_data, struct timeval *nowP)
 {
@@ -345,7 +358,16 @@ create_server_timers(struct iperf_test * test)
 	return -1;
     }
     cd.p = test;
-    test->stats_timer = test->reporter_timer = NULL;
+    test->timer = test->stats_timer = test->reporter_timer = NULL;
+    if (test->duration != 0 ) {
+        test->done = 0;
+        test->timer = tmr_create(&now, server_timer_proc, cd, (test->duration + test->omit + 5) * SEC_TO_US, 0);
+        if (test->timer == NULL) {
+            i_errno = IEINITTEST;
+            return -1;
+        }
+    }
+
     if (test->stats_interval != 0) {
         test->stats_timer = tmr_create(&now, server_stats_timer_proc, cd, test->stats_interval * SEC_TO_US, 1);
         if (test->stats_timer == NULL) {
@@ -427,6 +449,11 @@ cleanup_server(struct iperf_test *test)
 	tmr_cancel(test->omit_timer);
 	test->omit_timer = NULL;
     }
+    if (test->timer != NULL) {
+        tmr_cancel(test->timer);
+        test->timer = NULL;
+    }
+
 }