Already open socket (sockfd)?

I noticed that the library handles the binding using `usrsctp_socket(AF_INET6, SOCK_STREAM, IPPROTO_SCTP, receive_cb, NULL, 0, NULL)`

But in my own implementation, I already have an open socket (which I won't close). Is there any way to provide an already open socket to have SCTP on?

There is a simple library in nodejs that allows it but I need something like that in C.
