--- /dev/null
+/*
+ * Copyright (c) 2011-2012 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+/* $NetBSD: altq_red.h,v 1.5 2006/10/12 19:59:08 peter Exp $ */
+/* $KAME: altq_red.h,v 1.8 2003/07/10 12:07:49 kjc Exp $ */
+
+/*
+ * Copyright (C) 1997-2003
+ * Sony Computer Science Laboratories Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _NET_CLASSQ_CLASSQ_RED_H_
+#define _NET_CLASSQ_CLASSQ_RED_H_
+
+#ifdef PRIVATE
+#ifdef BSD_KERNEL_PRIVATE
+#include <net/classq/if_classq.h>
+#endif /* BSD_KERNEL_PRIVATE */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * simpler versions of red parameters and statistics used by other
+ * disciplines (e.g., CBQ)
+ */
+struct redparams {
+ int th_min; /* red min threshold */
+ int th_max; /* red max threshold */
+ int inv_pmax; /* inverse of max drop probability */
+};
+
+struct red_stats {
+ int32_t q_avg;
+ u_int32_t _pad;
+ u_int32_t drop_forced;
+ u_int32_t drop_unforced;
+ u_int32_t marked_packets;
+};
+
+#ifdef BSD_KERNEL_PRIVATE
+/* weight table structure for idle time calibration */
+struct wtab {
+ struct wtab *w_next;
+ int w_weight;
+ int w_param_max;
+ int w_refcount;
+ int32_t w_tab[32];
+};
+
+/* red flags */
+#define REDF_ECN4 0x01 /* use packet marking for IPv4 packets */
+#define REDF_ECN6 0x02 /* use packet marking for IPv6 packets */
+#define REDF_ECN (REDF_ECN4 | REDF_ECN6)
+#define REDF_FLOWVALVE 0x04 /* use flowvalve (aka penalty-box) */
+
+#define REDF_USERFLAGS \
+ (REDF_ECN4 | REDF_ECN6 | REDF_FLOWVALVE)
+
+typedef struct red {
+ int red_pkttime; /* average packet time in micro sec */
+ /* used for idle calibration */
+ int red_flags; /* red flags */
+ struct ifnet *red_ifp; /* back pointer to ifnet */
+
+ /* red parameters */
+ int red_weight; /* weight for EWMA */
+ int red_inv_pmax; /* inverse of max drop probability */
+ int red_thmin; /* red min threshold */
+ int red_thmax; /* red max threshold */
+
+ /* variables for internal use */
+ int red_wshift; /* log(red_weight) */
+ int red_thmin_s; /* th_min scaled by avgshift */
+ int red_thmax_s; /* th_max scaled by avgshift */
+ int red_probd; /* drop probability denominator */
+
+ int red_avg; /* queue len avg scaled by avgshift */
+ int red_count; /* packet count since last dropped/ */
+ /* marked packet */
+ int red_idle; /* queue was empty */
+ int red_old; /* avg is above th_min */
+ struct wtab *red_wtab; /* weight table */
+ struct timeval red_last; /* time when the queue becomes idle */
+
+ struct {
+ struct pktcntr xmit_cnt;
+ struct pktcntr drop_cnt;
+ u_int32_t drop_forced;
+ u_int32_t drop_unforced;
+ u_int32_t marked_packets;
+ } red_stats;
+} red_t;
+
+/* red drop types */
+#define DTYPE_NODROP 0 /* no drop */
+#define DTYPE_FORCED 1 /* a "forced" drop */
+#define DTYPE_EARLY 2 /* an "unforced" (early) drop */
+
+extern void red_init(void);
+extern red_t *red_alloc(struct ifnet *, int, int, int, int, int, int);
+extern void red_destroy(red_t *);
+extern void red_getstats(red_t *, struct red_stats *);
+extern int red_addq(red_t *, class_queue_t *, struct mbuf *, struct pf_mtag *);
+extern struct mbuf *red_getq(red_t *, class_queue_t *);
+extern void red_purgeq(struct red *, class_queue_t *, u_int32_t,
+ u_int32_t *, u_int32_t *);
+extern void red_updateq(red_t *, cqev_t);
+extern int red_suspendq(red_t *, class_queue_t *, boolean_t);
+
+extern int drop_early(int, int, int);
+extern struct wtab *wtab_alloc(int);
+extern void wtab_destroy(struct wtab *);
+extern int32_t pow_w(struct wtab *, int);
+#endif /* BSD_KERNEL_PRIVATE */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* PRIVATE */
+#endif /* _NET_CLASSQ_CLASSQ_RED_H_ */
projects / apple / xnu.git / blobdiff