NetworkRTCTCPSocketCocoa should send the interface name to its WebPro…

…cess if not null

https://bugs.webkit.org/show_bug.cgi?id=259554
rdar://112931044

Reviewed by Alex Christensen.

nw_interface_get_name can return null, in which case sending a null string to the WebProcess is neither good nor useful.

* Source/WebKit/NetworkProcess/webrtc/NetworkRTCTCPSocketCocoa.mm:
(WebKit::NetworkRTCTCPSocketCocoa::NetworkRTCTCPSocketCocoa):

Canonical link: https://commits.webkit.org/266360@main

Source/WebKit/NetworkProcess/webrtc/NetworkRTCTCPSocketCocoa.mm

@@ -113,8 +113,8 @@ static inline void processIncomingData(RetainPtr<nw_connection_t>&& nwConnection
                     return;
                 auto path = adoptNS(nw_connection_copy_current_path(weakThis->m_nwConnection.get()));
                 auto interface = adoptNS(nw_path_copy_interface(path.get()));
-                auto* name = nw_interface_get_name(interface.get());
-                connection->send(Messages::LibWebRTCNetwork::SignalUsedInterface(identifier, String::fromUTF8(name)), 0);
+                if (auto* name = nw_interface_get_name(interface.get()))
+                    connection->send(Messages::LibWebRTCNetwork::SignalUsedInterface(identifier, String::fromUTF8(name)), 0);
             });
             connection->send(Messages::LibWebRTCNetwork::SignalConnect(identifier), 0);
             return;