$OpenBSD: patch-src_iperf_api_c,v 1.3 2018/07/11 15:36:55 gonzalo Exp $

Index: src/iperf_api.c
--- src/iperf_api.c.orig
+++ src/iperf_api.c
@@ -2145,7 +2145,7 @@ iperf_defaults(struct iperf_test *testp)
     testp->stats_interval = testp->reporter_interval = 1;
     testp->num_streams = 1;
 
-    testp->settings->domain = AF_UNSPEC;
+    testp->settings->domain = AF_INET;
     testp->settings->unit_format = 'a';
     testp->settings->socket_bufsize = 0;    /* use autotuning */
     testp->settings->blksize = DEFAULT_TCP_BLKSIZE;
