#define BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT 45 /* Next DTLS handshake timeout to
* adjust socket timeouts */
+#define BIO_CTRL_DGRAM_GET_MTU_OVERHEAD 49
+
#ifndef OPENSSL_NO_SCTP
/* SCTP stuff */
#define BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE 50
(int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_PEER, 0, (char *)peer)
#define BIO_dgram_set_peer(b,peer) \
(int)BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, (char *)peer)
+#define BIO_dgram_get_mtu_overhead(b) \
+ (unsigned int)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_MTU_OVERHEAD, 0, NULL)
/* These two aren't currently implemented */
/* int BIO_get_ex_num(BIO *bio); */