From a4bdee82c3a8a340b81b31bb911c04e33e3d44f8 Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@gmail.com>
Date: Fri, 19 Jun 2020 20:46:04 -0700
Subject: [PATCH] travis fixup networking

---
 .ci-local/travis-fixup.sh | 19 +++++++++++++++++++
 .travis.yml               |  1 +
 2 files changed, 20 insertions(+)
 create mode 100755 .ci-local/travis-fixup.sh

diff --git a/.ci-local/travis-fixup.sh b/.ci-local/travis-fixup.sh
new file mode 100755
index 000000000..7d1ea8235
--- /dev/null
+++ b/.ci-local/travis-fixup.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+set -e -u -x
+
+env|grep TRAVIS
+
+[ "$TRAVIS_OS_NAME" = "linux" ] || exit 0
+
+# Ensure there is an interface with a (correct) broadcast address
+# eg. 'trusty' VMs have interface broadcast address mis-configured
+# (why oh why do people insist on setting this explicitly?)
+
+sudo ip tuntap add dev tap42 mode tap
+
+sudo ip addr add 192.168.240.1/24 broadcast + dev tap42
+
+sudo ip link set dev tap42 up
+
+# note that this device will be UP but not RUNNING
+# so java will see it as not UP since java confuses UP and RUNNING
diff --git a/.travis.yml b/.travis.yml
index a2f16784b..45f3a0073 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -35,6 +35,7 @@ addons:
     update: true
 
 install:
+  - ./.ci-local/travis-fixup.sh
   - ./.ci/travis/prepare.sh
 
 script: