From 072af49059a1818e0e06188be81fe425363acf55 Mon Sep 17 00:00:00 2001
From: Kevin Krakauer <krakauer@google.com>
Date: Wed, 23 Oct 2019 17:20:07 -0700
Subject: [PATCH] Add check for proper settings to AF_PACKET tests.

As in packet_socket_raw.cc, we should check that certain proc files are set
correctly.

PiperOrigin-RevId: 276384534
---
 test/syscalls/linux/packet_socket.cc | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/test/syscalls/linux/packet_socket.cc b/test/syscalls/linux/packet_socket.cc
index fcf64ee59..92ae55eec 100644
--- a/test/syscalls/linux/packet_socket.cc
+++ b/test/syscalls/linux/packet_socket.cc
@@ -130,6 +130,20 @@ void CookedPacketTest::SetUp() {
     GTEST_SKIP();
   }
 
+  if (!IsRunningOnGvisor()) {
+    FileDescriptor acceptLocal = ASSERT_NO_ERRNO_AND_VALUE(
+        Open("/proc/sys/net/ipv4/conf/lo/accept_local", O_RDONLY));
+    FileDescriptor routeLocalnet = ASSERT_NO_ERRNO_AND_VALUE(
+        Open("/proc/sys/net/ipv4/conf/lo/route_localnet", O_RDONLY));
+    char enabled;
+    ASSERT_THAT(read(acceptLocal.get(), &enabled, 1),
+                SyscallSucceedsWithValue(1));
+    ASSERT_EQ(enabled, '1');
+    ASSERT_THAT(read(routeLocalnet.get(), &enabled, 1),
+                SyscallSucceedsWithValue(1));
+    ASSERT_EQ(enabled, '1');
+  }
+
   ASSERT_THAT(socket_ = socket(AF_PACKET, SOCK_DGRAM, htons(GetParam())),
               SyscallSucceeds());
 }