X-Git-Url: http://git.onelab.eu/?p=libnl.git;a=blobdiff_plain;f=lib%2Froute%2Fsch%2Fred.c;fp=lib%2Froute%2Fsch%2Fred.c;h=80a44af9ba25e4e2d58c7ebbf2464f911594a712;hp=0000000000000000000000000000000000000000;hb=4cee2ecb3b8afa0637e6f5fe4c57985a4bc740ff;hpb=2df2fbe518d5a221ce6e3ee88a3fb23fb1b94b27

diff --git a/lib/route/sch/red.c b/lib/route/sch/red.c
new file mode 100644
index 0000000..80a44af
--- /dev/null
+++ b/lib/route/sch/red.c
@@ -0,0 +1,219 @@
+/*
+ * lib/route/sch/red.c		RED Qdisc
+ *
+ *	This library is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation version 2.1
+ *	of the License.
+ *
+ * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
+ */
+
+/**
+ * @ingroup qdisc
+ * @defgroup red Random Early Detection (RED)
+ * @brief
+ * @{
+ */
+
+#include <netlink-local.h>
+#include <netlink-tc.h>
+#include <netlink/netlink.h>
+#include <netlink/utils.h>
+#include <netlink/route/qdisc.h>
+#include <netlink/route/qdisc-modules.h>
+#include <netlink/route/sch/red.h>
+
+/** @cond SKIP */
+#define RED_ATTR_LIMIT		0x01
+#define RED_ATTR_QTH_MIN	0x02
+#define RED_ATTR_QTH_MAX	0x04
+#define RED_ATTR_FLAGS		0x08
+#define RED_ATTR_WLOG		0x10
+#define RED_ATTR_PLOG		0x20
+#define RED_ATTR_SCELL_LOG	0x40
+/** @endcond */
+
+static inline struct rtnl_red *red_qdisc(struct rtnl_qdisc *qdisc)
+{
+	return (struct rtnl_red *) qdisc->q_subdata;
+}
+
+static inline struct rtnl_red *red_alloc(struct rtnl_qdisc *qdisc)
+{
+	if (!qdisc->q_subdata)
+		qdisc->q_subdata = calloc(1, sizeof(struct rtnl_red));
+
+	return red_qdisc(qdisc);
+}
+
+static struct nla_policy red_policy[TCA_RED_MAX+1] = {
+	[TCA_RED_PARMS]		= { .minlen = sizeof(struct tc_red_qopt) },
+};
+
+static int red_msg_parser(struct rtnl_qdisc *qdisc)
+{
+	struct nlattr *tb[TCA_RED_MAX+1];
+	struct rtnl_red *red;
+	struct tc_red_qopt *opts;
+	int err;
+
+	if (!(qdisc->q_mask & TCA_ATTR_OPTS))
+		return 0;
+
+	err = tca_parse(tb, TCA_RED_MAX, (struct rtnl_tca *) qdisc, red_policy);
+	if (err < 0)
+		return err;
+
+	if (!tb[TCA_RED_PARMS])
+		return nl_error(EINVAL, "Missing TCA_RED_PARMS");
+
+	red = red_alloc(qdisc);
+	if (!red)
+		return nl_errno(ENOMEM);
+
+	opts = nla_data(tb[TCA_RED_PARMS]);
+
+	red->qr_limit = opts->limit;
+	red->qr_qth_min = opts->qth_min;
+	red->qr_qth_max = opts->qth_max;
+	red->qr_flags = opts->flags;
+	red->qr_wlog = opts->Wlog;
+	red->qr_plog = opts->Plog;
+	red->qr_scell_log = opts->Scell_log;
+
+	red->qr_mask = (RED_ATTR_LIMIT | RED_ATTR_QTH_MIN | RED_ATTR_QTH_MAX |
+			RED_ATTR_FLAGS | RED_ATTR_WLOG | RED_ATTR_PLOG |
+			RED_ATTR_SCELL_LOG);
+
+	return 0;
+}
+
+static int red_dump_brief(struct rtnl_qdisc *qdisc, struct nl_dump_params *p,
+			  int line)
+{
+	struct rtnl_red *red = red_qdisc(qdisc);
+
+	if (red) {
+		/* XXX: limit, min, max, flags */
+	}
+
+	return line;
+}
+
+static int red_dump_full(struct rtnl_qdisc *qdisc, struct nl_dump_params *p,
+			 int line)
+{
+	struct rtnl_red *red = red_qdisc(qdisc);
+
+	if (red) {
+		/* XXX: wlog, plog, scell_log */
+	}
+
+	return line;
+}
+
+static int red_dump_stats(struct rtnl_qdisc *qdisc, struct nl_dump_params *p,
+			  int line)
+{
+	struct rtnl_red *red = red_qdisc(qdisc);
+
+	if (red) {
+		/* XXX: xstats */
+	}
+
+	return line;
+}
+
+static struct nl_msg *red_get_opts(struct rtnl_qdisc *qdisc)
+{
+	struct rtnl_red *red;
+	struct nl_msg *msg;
+
+	red = red_qdisc(qdisc);
+	if (!red)
+		return NULL;
+
+	msg = nlmsg_build_no_hdr();
+	if (!msg)
+		goto errout;
+
+#if 0
+	memset(&opts, 0, sizeof(opts));
+	opts.quantum = sfq->qs_quantum;
+	opts.perturb_period = sfq->qs_perturb;
+	opts.limit = sfq->qs_limit;
+
+	if (nlmsg_append(msg, &opts, sizeof(opts), 0) < 0)
+		goto errout;
+#endif
+
+	return msg;
+errout:
+	nlmsg_free(msg);
+	return NULL;
+}
+
+/**
+ * @name Attribute Access
+ * @{
+ */
+
+/**
+ * Set limit of RED qdisc.
+ * @arg qdisc		RED qdisc to be modified.
+ * @arg limit		New limit in number of packets.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_red_set_limit(struct rtnl_qdisc *qdisc, int limit)
+{
+	struct rtnl_red *red;
+
+	red = red_alloc(qdisc);
+	if (!red)
+		return nl_errno(ENOMEM);
+
+	red->qr_limit = limit;
+	red->qr_mask |= RED_ATTR_LIMIT;
+
+	return 0;
+}
+
+/**
+ * Get limit of RED qdisc.
+ * @arg qdisc		RED qdisc.
+ * @return Limit or a negative error code.
+ */
+int rtnl_red_get_limit(struct rtnl_qdisc *qdisc)
+{
+	struct rtnl_red *red;
+
+	red = red_qdisc(qdisc);
+	if (red && (red->qr_mask & RED_ATTR_LIMIT))
+		return red->qr_limit;
+	else
+		return nl_errno(ENOENT);
+}
+
+/** @} */
+
+static struct rtnl_qdisc_ops red_ops = {
+	.qo_kind		= "red",
+	.qo_msg_parser		= red_msg_parser,
+	.qo_dump[NL_DUMP_BRIEF]	= red_dump_brief,
+	.qo_dump[NL_DUMP_FULL]	= red_dump_full,
+	.qo_dump[NL_DUMP_STATS]	= red_dump_stats,
+	.qo_get_opts		= red_get_opts,
+};
+
+static void __init red_init(void)
+{
+	rtnl_qdisc_register(&red_ops);
+}
+
+static void __exit red_exit(void)
+{
+	rtnl_qdisc_unregister(&red_ops);
+}
+
+/** @} */