From 773071680021a2fb985f3a3af7e9f65cdc1bd1ed Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Mon, 11 Nov 2019 14:13:50 -0800
Subject: Make `connect` on socket returned by `accept` correctly error out
 with EISCONN

PiperOrigin-RevId: 279814493
---
 test/syscalls/linux/tcp_socket.cc | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'test/syscalls')

diff --git a/test/syscalls/linux/tcp_socket.cc b/test/syscalls/linux/tcp_socket.cc
index 277d6835a..bfc77ffc2 100644
--- a/test/syscalls/linux/tcp_socket.cc
+++ b/test/syscalls/linux/tcp_socket.cc
@@ -130,6 +130,19 @@ void TcpSocketTest::TearDown() {
   }
 }
 
+TEST_P(TcpSocketTest, ConnectOnEstablishedConnection) {
+  sockaddr_storage addr =
+      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
+  socklen_t addrlen = sizeof(addr);
+
+  ASSERT_THAT(
+      connect(s_, reinterpret_cast<const struct sockaddr*>(&addr), addrlen),
+      SyscallFailsWithErrno(EISCONN));
+  ASSERT_THAT(
+      connect(t_, reinterpret_cast<const struct sockaddr*>(&addr), addrlen),
+      SyscallFailsWithErrno(EISCONN));
+}
+
 TEST_P(TcpSocketTest, DataCoalesced) {
   char buf[10];
 
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