639  * issue a challenge
643 	struct rxkad_challenge challenge;  in rxkad_issue_challenge()  local
659 	challenge.version	= htonl(2);  in rxkad_issue_challenge()
660 	challenge.nonce		= htonl(conn->security_nonce);  in rxkad_issue_challenge()
661 	challenge.min_level	= htonl(0);  in rxkad_issue_challenge()
662 	challenge.__padding	= 0;  in rxkad_issue_challenge()
683 	iov[1].iov_base	= &challenge;  in rxkad_issue_challenge()
684 	iov[1].iov_len	= sizeof(challenge);  in rxkad_issue_challenge()
690 	_proto("Tx CHALLENGE %%%u", serial);  in rxkad_issue_challenge()
806  * respond to a challenge packet
813 	struct rxkad_challenge challenge;  in rxkad_respond_to_challenge()  local
835 			  &challenge, sizeof(challenge)) < 0)  in rxkad_respond_to_challenge()
838 	version = ntohl(challenge.version);  in rxkad_respond_to_challenge()
839 	nonce = ntohl(challenge.nonce);  in rxkad_respond_to_challenge()
840 	min_level = ntohl(challenge.min_level);  in rxkad_respond_to_challenge()
842 	_proto("Rx CHALLENGE %%%u { v=%u n=%u ml=%u }",  in rxkad_respond_to_challenge()
1237 	 * ENOMEM.  We just want to send the challenge again.  Note that we  in rxkad_verify_response()