unix: Report connected status to socket module

Report connected status to the socket module. Otherwise, operations
like `getpeername` would not work correctly.

Fixes #18534.

Change-Id: I99d047f0d7b4d442cc2b3ea9222b0d89d216c1ae
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6719
Reviewed-by: waddlesplash <[email protected]>
Tested-by: Commit checker robot <[email protected]>

src/add-ons/kernel/network/protocols/unix/UnixDatagramEndpoint.cpp

@@ -185,6 +185,7 @@ UnixDatagramEndpoint::Connect(const struct sockaddr* _address)
 
 	// Required by the socket layer.
 	PeerAddress().SetTo(&fTargetEndpoint->socket->address);
+	gSocketModule->set_connected(Socket());
 
 	RETURN_ERROR(B_OK);
 }

src/add-ons/kernel/network/protocols/unix/UnixStreamEndpoint.cpp

@@ -323,7 +323,7 @@ UnixStreamEndpoint::Connect(const struct sockaddr* _address)
 	fState = unix_stream_endpoint_state::Connected;
 	fWasConnected = true;
 
-	gSocketModule->set_connected(newSocket);
+	gSocketModule->set_connected(Socket());
 
 	release_sem(listeningEndpoint->fAcceptSemaphore);
 
@@ -709,6 +709,8 @@ UnixStreamEndpoint::_Spawn(UnixStreamEndpoint* connectingEndpoint,
 	fCredentials = listeningEndpoint->fCredentials;
 
 	fState = unix_stream_endpoint_state::Connected;
+
+	gSocketModule->set_connected(Socket());
 }