[IPv6] Fix a bug in the IPv6 listen behavior

The socket bind address should either be localhost or anyaddress. This bug in the listen behavior was preventing lldb-server from opening sockets for non-localhost connections.

The added test verifies that opening an anyaddress socket works and has a non-zero port assignment.

This should resolve PR34183.

llvm-svn: 312008

2 files changed, 19 insertions, 3 deletions

diff --git a/lldb/source/Host/common/TCPSocket.cpp b/lldb/source/Host/common/TCPSocket.cpp
index a7af93f10a7..f896944bb1b 100644
--- a/lldb/source/Host/common/TCPSocket.cpp
+++ b/lldb/source/Host/common/TCPSocket.cpp
@@ -198,9 +198,14 @@ Status TCPSocket::Listen(llvm::StringRef name, int backlog) {
     ::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, option_value_p,
                  sizeof(option_value));
 
-    address.SetPort(port);
-
-    int err = ::bind(fd, &address.sockaddr(), address.GetLength());
+    SocketAddress listen_address = address;
+    if(!listen_address.IsLocalhost())
+      listen_address.SetToAnyAddress(address.GetFamily(), port);
+    else
+      listen_address.SetPort(port);
+
+    int err =
+        ::bind(fd, &listen_address.sockaddr(), listen_address.GetLength());
     if (-1 != err)
       err = ::listen(fd, backlog);
 
diff --git a/lldb/unittests/Host/SocketTest.cpp b/lldb/unittests/Host/SocketTest.cpp
index d8fdc593ed4..59f59fc0ada 100644
--- a/lldb/unittests/Host/SocketTest.cpp
+++ b/lldb/unittests/Host/SocketTest.cpp
@@ -220,3 +220,14 @@ TEST_F(SocketTest, UDPConnect) {
   EXPECT_TRUE(error.Success());
   EXPECT_TRUE(socket_up->IsValid());
 }
+
+TEST_F(SocketTest, TCPListen0GetPort) {
+  Socket *server_socket;
+  Predicate<uint16_t> port_predicate;
+  port_predicate.SetValue(0, eBroadcastNever);
+  Status err =
+      Socket::TcpListen("10.10.12.3:0", false, server_socket, &port_predicate);
+  std::unique_ptr<TCPSocket> socket_up((TCPSocket*)server_socket);
+  EXPECT_TRUE(socket_up->IsValid());
+  EXPECT_NE(socket_up->GetLocalPortNumber(), 0);
+}