Issue 1118 (#1121)

* fix: Correctly emit JSON for --server --json.

Put extra error diagnostic information behind --verbose, to avoid putting
extra "error" members in JSON output.

Fixes #1118.

src/iperf_api.c

@@ -1642,7 +1642,8 @@ iperf_check_total_rate(struct iperf_test *test, iperf_size_t last_interval_bytes
     }
 
     if (bits_per_second  > test->settings->bitrate_limit) {
-	iperf_err(test, "Total throughput of %" PRIu64 " bps exceeded %" PRIu64 " bps limit", bits_per_second, test->settings->bitrate_limit);
+        if (iperf_get_verbose(test))
+            iperf_err(test, "Total throughput of %" PRIu64 " bps exceeded %" PRIu64 " bps limit", bits_per_second, test->settings->bitrate_limit);
 	test->bitrate_limit_exceeded = 1;
     }
 }

src/iperf_server_api.c

@@ -517,8 +517,9 @@ iperf_run_server(struct iperf_test *test)
                 else if (t_usecs > NO_MSG_RCVD_TIMEOUT * SEC_TO_US) {
                     test->server_forced_no_msg_restarts_count += 1;
                     i_errno = IENOMSG;
-                    iperf_err(test, "Server restart (#%d) in active test as no message was received for %d sec",
-                        test->server_forced_no_msg_restarts_count, NO_MSG_RCVD_TIMEOUT);
+                    if (iperf_get_verbose(test))
+                        iperf_err(test, "Server restart (#%d) in active test as no message was received for %d sec",
+                                  test->server_forced_no_msg_restarts_count, NO_MSG_RCVD_TIMEOUT);
                     cleanup_server(test);
                     return -1;
                 }
@@ -688,8 +689,9 @@ iperf_run_server(struct iperf_test *test)
 		    /* Ensure that total requested data rate is not above limit */
 		    iperf_size_t total_requested_rate = test->num_streams * test->settings->rate * (test->mode == BIDIRECTIONAL? 2 : 1);
 		    if (test->settings->bitrate_limit > 0 && total_requested_rate > test->settings->bitrate_limit) {
-			iperf_err(test, "Client total requested throughput rate of %" PRIu64 " bps exceeded %" PRIu64 " bps limit",
-				total_requested_rate, test->settings->bitrate_limit);
+                        if (iperf_get_verbose(test))
+                            iperf_err(test, "Client total requested throughput rate of %" PRIu64 " bps exceeded %" PRIu64 " bps limit",
+                                      total_requested_rate, test->settings->bitrate_limit);
 			cleanup_server(test);
 			i_errno = IETOTALRATE;
 			return -1;

src/main.c

@@ -1,5 +1,5 @@
 /*
- * iperf, Copyright (c) 2014, 2015, 2017, 2019, The Regents of the University of
+ * iperf, Copyright (c) 2014-2021, The Regents of the University of
  * California, through Lawrence Berkeley National Laboratory (subject
  * to receipt of any required approvals from the U.S. Dept. of
  * Energy).  All rights reserved.
@@ -154,6 +154,12 @@ run(struct iperf_test *test)
                 test->server_last_run_rc =rc;
 		if (rc < 0) {
 		    iperf_err(test, "error - %s", iperf_strerror(i_errno));
+                    if (test->json_output) {
+                        if (iperf_json_finish(test) < 0)
+                            return -1;
+                    }
+                    iflush(test);
+
 		    if (rc < -1) {
 		        iperf_errexit(test, "exiting");
 		    }