ObjFW  Check-in [580e5ab656]

	struct iovec iov = {
		.iov_base = buffer,
		.iov_len = length
	};
	struct sctp_rcvinfo rcvinfo;
	socklen_t rcvinfoSize = (socklen_t)sizeof(rcvinfo);
	unsigned int infotype = SCTP_RECVV_RCVINFO;
	int flags;

	if (_socket == OFInvalidSocketHandle)
		@throw [OFNotOpenException exceptionWithObject: self];

	if ((ret = sctp_recvv(_socket, &iov, 1, NULL, 0, &rcvinfo, &rcvinfoSize,
	    &infotype, 0)) < 0)
	if ((ret = sctp_recvv(_socket, &iov, 1, NULL, NULL,
	    &rcvinfo, &rcvinfoSize, &infotype, &flags)) < 0)
		@throw [OFReadFailedException
		    exceptionWithObject: self
			requestedLength: length
				  errNo: _OFSocketErrNo()];

	if (info != NULL) {
		if (infotype == SCTP_RECVV_RCVINFO &&