BIO_new_dgram_sctp
BIO *tmpbio = BIO_new_dgram_sctp(*sock, BIO_NOCLOSE);
BIO *tmpbio = BIO_new_dgram_sctp(asock, BIO_NOCLOSE);
sbio = BIO_new_dgram_sctp(sock, BIO_NOCLOSE);
sbio = BIO_new_dgram_sctp(s, BIO_NOCLOSE);
BIO *BIO_new_dgram_sctp(int fd, int close_flag);
tmpbio = BIO_new_dgram_sctp(sock, BIO_NOCLOSE);
client_to_server = BIO_new_dgram_sctp(csock, BIO_CLOSE);
server_to_client = BIO_new_dgram_sctp(ssock, BIO_CLOSE);