For Mac OSX, when DARWIN_USE_IPCONFIG is defined, retry ipconfig

command on failure once every second for up to 15 seconds.  This
is necessary to work around an issue observed on OSX 10.5 where
the ipconfig command sometimes fails if executed immediately after
the tun device open.


git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@7151 e7ae566f-a301-0410-adde-c780ea21d3b5

1 files changed, 11 insertions, 1 deletions

diff --git a/tun.c b/tun.c
index 8c94f89..f2dec25 100644
--- a/tun.c
+++ b/tun.c
@@ -801,7 +801,17 @@ do_ifconfig (struct tuntap *tt,
 		       );
 	}
       argv_msg (M_INFO, &argv);
-      openvpn_execve_check (&argv, es, S_FATAL, "Mac OS X ipconfig failed");
+      {
+	int i;
+	const int n = 15;
+	for (i = 1; i <= n; ++i) /* OSX 10.5 needs retry */
+	  {
+	    if (openvpn_execve_check (&argv, es, (i == n) ? S_FATAL : 0, "Mac OS X ipconfig failed"))
+	      break;
+	    msg (M_INFO, "Retry #%d", i);
+	    openvpn_sleep(1);
+	  }
+      }
       tt->did_ifconfig = true;
 #else
       /*