commit 0f7f2ebfbf090cbde2c83821309c6f7cc1338f83
author Lorenzo Colitti <lorenzo@google.com> Thu May 19 02:45:12 2022 +0000
committer Patrick Rohr <prohr@google.com> Wed May 25 11:50:30 2022 -0700
tree db4a413e6f31ddccad7b5f48a7e955a80d1fe64f
parent 898a5f9accda3f48f3f119488f11645390724b26

Assume all Ethernet interfaces have an MTU of 1500.

This avoids races where NetworkInterface.getByName does not return the interface
right after it is created.

Change-Id: I17a5a22034bafc30023307d5480db18e918fc042
Test: test-only change
Bug: 227008268
(cherry picked from commit d0ebb64ad1a75bd4b045a204f70e42a0a08605ab)
Merged-In: I17a5a22034bafc30023307d5480db18e918fc042

tests/cts/net/src/android/net/cts/EthernetManagerTest.kt

diff --git a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
index b12c4db..a16a7f8 100644
--- a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
@@ -93,7 +93,7 @@
                 val tnm = context.getSystemService(TestNetworkManager::class.java)
                 tnm.createTapInterface(false /* bringUp */)
             }
-            val mtu = NetworkInterface.getByName(tapInterface.interfaceName).getMTU()
+            val mtu = 1500
             packetReader = TapPacketReader(handler, tapInterface.fileDescriptor.fileDescriptor, mtu)
             raResponder = RouterAdvertisementResponder(packetReader)
             raResponder.addRouterEntry(MacAddress.fromString("01:23:45:67:89:ab"),