--- /dev/null
+/*
+ * lib/route/sch/netem.c Network Emulator 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 netem Network Emulator
+ * @brief
+ *
+ * For further documentation see http://linux-net.osdl.org/index.php/Netem
+ * @{
+ */
+
+#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/netem.h>
+
+/** @cond SKIP */
+#define SCH_NETEM_ATTR_LATENCY 0x001
+#define SCH_NETEM_ATTR_LIMIT 0x002
+#define SCH_NETEM_ATTR_LOSS 0x004
+#define SCH_NETEM_ATTR_GAP 0x008
+#define SCH_NETEM_ATTR_DUPLICATE 0x010
+#define SCH_NETEM_ATTR_JITTER 0x020
+#define SCH_NETEM_ATTR_DELAY_CORR 0x040
+#define SCH_NETEM_ATTR_LOSS_CORR 0x080
+#define SCH_NETEM_ATTR_DUP_CORR 0x100
+#define SCH_NETEM_ATTR_RO_PROB 0x200
+#define SCH_NETEM_ATTR_RO_CORR 0x400
+/** @endcond */
+
+static inline struct rtnl_netem *netem_qdisc(struct rtnl_qdisc *qdisc)
+{
+ return (struct rtnl_netem *) qdisc->q_subdata;
+}
+
+static inline struct rtnl_netem *netem_alloc(struct rtnl_qdisc *qdisc)
+{
+ if (!qdisc->q_subdata)
+ qdisc->q_subdata = calloc(1, sizeof(struct rtnl_netem));
+
+ return netem_qdisc(qdisc);
+}
+
+static struct nla_policy netem_policy[TCA_NETEM_MAX+1] = {
+ [TCA_NETEM_CORR] = { .minlen = sizeof(struct tc_netem_corr) },
+ [TCA_NETEM_REORDER] = { .minlen = sizeof(struct tc_netem_reorder) },
+};
+
+static int netem_msg_parser(struct rtnl_qdisc *qdisc)
+{
+ int len, err = 0;
+ struct rtnl_netem *netem;
+ struct tc_netem_qopt *opts;
+
+ if (qdisc->q_opts->d_size < sizeof(*opts))
+ return nl_error(EINVAL, "Netem specific options size mismatch");
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ opts = (struct tc_netem_qopt *) qdisc->q_opts->d_data;
+ netem->qnm_latency = opts->latency;
+ netem->qnm_limit = opts->limit;
+ netem->qnm_loss = opts->loss;
+ netem->qnm_gap = opts->gap;
+ netem->qnm_duplicate = opts->duplicate;
+ netem->qnm_jitter = opts->jitter;
+
+ netem->qnm_mask = (SCH_NETEM_ATTR_LATENCY | SCH_NETEM_ATTR_LIMIT |
+ SCH_NETEM_ATTR_LOSS | SCH_NETEM_ATTR_GAP |
+ SCH_NETEM_ATTR_DUPLICATE | SCH_NETEM_ATTR_JITTER);
+
+ len = qdisc->q_opts->d_size - sizeof(*opts);
+
+ if (len > 0) {
+ struct nlattr *tb[TCA_NETEM_MAX+1];
+
+ err = nla_parse(tb, TCA_NETEM_MAX, (struct nlattr *)
+ qdisc->q_opts->d_data + sizeof(*opts),
+ len, netem_policy);
+ if (err < 0) {
+ free(netem);
+ return err;
+ }
+
+ if (tb[TCA_NETEM_CORR]) {
+ struct tc_netem_corr cor;
+
+ nla_memcpy(&cor, tb[TCA_NETEM_CORR], sizeof(cor));
+ netem->qnm_corr.nmc_delay = cor.delay_corr;
+ netem->qnm_corr.nmc_loss = cor.loss_corr;
+ netem->qnm_corr.nmc_duplicate = cor.dup_corr;
+
+ netem->qnm_mask |= (SCH_NETEM_ATTR_DELAY_CORR |
+ SCH_NETEM_ATTR_LOSS_CORR |
+ SCH_NETEM_ATTR_DELAY_CORR);
+ }
+
+ if (tb[TCA_NETEM_REORDER]) {
+ struct tc_netem_reorder ro;
+
+ nla_memcpy(&ro, tb[TCA_NETEM_REORDER], sizeof(ro));
+ netem->qnm_ro.nmro_probability = ro.probability;
+ netem->qnm_ro.nmro_correlation = ro.correlation;
+
+ netem->qnm_mask |= (SCH_NETEM_ATTR_RO_PROB |
+ SCH_NETEM_ATTR_RO_CORR);
+ }
+ }
+
+ return 0;
+}
+
+static void netem_free_data(struct rtnl_qdisc *qdisc)
+{
+ free(qdisc->q_subdata);
+}
+
+static int netem_dump_brief(struct rtnl_qdisc *qdisc, struct nl_dump_params *p,
+ int line)
+{
+ struct rtnl_netem *netem = netem_qdisc(qdisc);
+
+ if (netem)
+ dp_dump(p, "limit %d", netem->qnm_limit);
+
+ return line;
+}
+
+static int netem_dump_full(struct rtnl_qdisc *qdisc, struct nl_dump_params *p,
+ int line)
+{
+ return line;
+}
+
+static struct nl_msg *netem_get_opts(struct rtnl_qdisc *qdisc)
+{
+ return NULL;
+}
+
+/**
+ * @name Queue Limit
+ * @{
+ */
+
+/**
+ * Set limit of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg limit New limit in bytes.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_limit(struct rtnl_qdisc *qdisc, int limit)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_limit = limit;
+ netem->qnm_mask |= SCH_NETEM_ATTR_LIMIT;
+
+ return 0;
+}
+
+/**
+ * Get limit of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Limit in bytes or a negative error code.
+ */
+int rtnl_netem_get_limit(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_LIMIT))
+ return netem->qnm_limit;
+ else
+ return nl_errno(ENOENT);
+}
+
+/** @} */
+
+/**
+ * @name Packet Re-ordering
+ * @{
+ */
+
+/**
+ * Set re-ordering gap of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg gap New gap in number of packets.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_gap(struct rtnl_qdisc *qdisc, int gap)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_gap = gap;
+ netem->qnm_mask |= SCH_NETEM_ATTR_GAP;
+
+ return 0;
+}
+
+/**
+ * Get re-ordering gap of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Re-ordering gap in packets or a negative error code.
+ */
+int rtnl_netem_get_gap(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_GAP))
+ return netem->qnm_gap;
+ else
+ return nl_errno(ENOENT);
+}
+
+/**
+ * Set re-ordering probability of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg prob New re-ordering probability.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_reorder_probability(struct rtnl_qdisc *qdisc, int prob)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_ro.nmro_probability = prob;
+ netem->qnm_mask |= SCH_NETEM_ATTR_RO_PROB;
+
+ return 0;
+}
+
+/**
+ * Get re-ordering probability of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Re-ordering probability or a negative error code.
+ */
+int rtnl_netem_get_reorder_probability(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_RO_PROB))
+ return netem->qnm_ro.nmro_probability;
+ else
+ return nl_errno(ENOENT);
+}
+
+/**
+ * Set re-order correlation probability of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg prob New re-ordering correlation probability.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_reorder_correlation(struct rtnl_qdisc *qdisc, int prob)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_ro.nmro_correlation = prob;
+ netem->qnm_mask |= SCH_NETEM_ATTR_RO_CORR;
+
+ return 0;
+}
+
+/**
+ * Get re-ordering correlation probability of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Re-ordering correlation probability or a negative error code.
+ */
+int rtnl_netem_get_reorder_correlation(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_RO_CORR))
+ return netem->qnm_ro.nmro_correlation;
+ else
+ return nl_errno(ENOENT);
+}
+
+/** @} */
+
+/**
+ * @name Packet Loss
+ * @{
+ */
+
+/**
+ * Set packet loss probability of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg prob New packet loss probability.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_loss(struct rtnl_qdisc *qdisc, int prob)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_loss = prob;
+ netem->qnm_mask |= SCH_NETEM_ATTR_LOSS;
+
+ return 0;
+}
+
+/**
+ * Get packet loss probability of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Packet loss probability or a negative error code.
+ */
+int rtnl_netem_get_loss(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_LOSS))
+ return netem->qnm_loss;
+ else
+ return nl_errno(ENOENT);
+}
+
+/**
+ * Set packet loss correlation probability of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg prob New packet loss correlation.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_loss_correlation(struct rtnl_qdisc *qdisc, int prob)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_corr.nmc_loss = prob;
+ netem->qnm_mask |= SCH_NETEM_ATTR_LOSS_CORR;
+
+ return 0;
+}
+
+/**
+ * Get packet loss correlation probability of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Packet loss correlation probability or a negative error code.
+ */
+int rtnl_netem_get_loss_correlation(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_LOSS_CORR))
+ return netem->qnm_corr.nmc_loss;
+ else
+ return nl_errno(ENOENT);
+}
+
+/** @} */
+
+/**
+ * @name Packet Duplication
+ * @{
+ */
+
+/**
+ * Set packet duplication probability of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg prob New packet duplication probability.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_duplicate(struct rtnl_qdisc *qdisc, int prob)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_duplicate = prob;
+ netem->qnm_mask |= SCH_NETEM_ATTR_DUPLICATE;
+
+ return 0;
+}
+
+/**
+ * Get packet duplication probability of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Packet duplication probability or a negative error code.
+ */
+int rtnl_netem_get_duplicate(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_DUPLICATE))
+ return netem->qnm_duplicate;
+ else
+ return nl_errno(ENOENT);
+}
+
+/**
+ * Set packet duplication correlation probability of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg prob New packet duplication correlation probability.
+ * @return 0 on sucess or a negative error code.
+ */
+int rtnl_netem_set_duplicate_correlation(struct rtnl_qdisc *qdisc, int prob)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_corr.nmc_duplicate = prob;
+ netem->qnm_mask |= SCH_NETEM_ATTR_DUP_CORR;
+
+ return 0;
+}
+
+/**
+ * Get packet duplication correlation probability of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Packet duplication correlation probability or a negative error code.
+ */
+int rtnl_netem_get_duplicate_correlation(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_DUP_CORR))
+ return netem->qnm_corr.nmc_duplicate;
+ else
+ return nl_errno(ENOENT);
+}
+
+/** @} */
+
+/**
+ * @name Packet Delay
+ * @{
+ */
+
+/**
+ * Set packet delay of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg delay New packet delay in micro seconds.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_delay(struct rtnl_qdisc *qdisc, int delay)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_latency = nl_us2ticks(delay);
+ netem->qnm_mask |= SCH_NETEM_ATTR_LATENCY;
+
+ return 0;
+}
+
+/**
+ * Get packet delay of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Packet delay in micro seconds or a negative error code.
+ */
+int rtnl_netem_get_delay(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_LATENCY))
+ return nl_ticks2us(netem->qnm_latency);
+ else
+ return nl_errno(ENOENT);
+}
+
+/**
+ * Set packet delay jitter of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg jitter New packet delay jitter in micro seconds.
+ * @return 0 on success or a negative error code.
+ */
+int rtnl_netem_set_jitter(struct rtnl_qdisc *qdisc, int jitter)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_jitter = nl_us2ticks(jitter);
+ netem->qnm_mask |= SCH_NETEM_ATTR_JITTER;
+
+ return 0;
+}
+
+/**
+ * Get packet delay jitter of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Packet delay jitter in micro seconds or a negative error code.
+ */
+int rtnl_netem_get_jitter(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_JITTER))
+ return nl_ticks2us(netem->qnm_jitter);
+ else
+ return nl_errno(ENOENT);
+}
+
+/**
+ * Set packet delay correlation probability of netem qdisc.
+ * @arg qdisc Netem qdisc to be modified.
+ * @arg prob New packet delay correlation probability.
+ */
+int rtnl_netem_set_delay_correlation(struct rtnl_qdisc *qdisc, int prob)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_alloc(qdisc);
+ if (!netem)
+ return nl_errno(ENOMEM);
+
+ netem->qnm_corr.nmc_delay = prob;
+ netem->qnm_mask |= SCH_NETEM_ATTR_DELAY_CORR;
+
+ return 0;
+}
+
+/**
+ * Get packet delay correlation probability of netem qdisc.
+ * @arg qdisc Netem qdisc.
+ * @return Packet delay correlation probability or a negative error code.
+ */
+int rtnl_netem_get_delay_corellation(struct rtnl_qdisc *qdisc)
+{
+ struct rtnl_netem *netem;
+
+ netem = netem_qdisc(qdisc);
+ if (netem && (netem->qnm_mask & SCH_NETEM_ATTR_DELAY_CORR))
+ return netem->qnm_corr.nmc_delay;
+ else
+ return nl_errno(ENOENT);
+}
+
+/** @} */
+
+static struct rtnl_qdisc_ops netem_ops = {
+ .qo_kind = "netem",
+ .qo_msg_parser = netem_msg_parser,
+ .qo_free_data = netem_free_data,
+ .qo_dump[NL_DUMP_BRIEF] = netem_dump_brief,
+ .qo_dump[NL_DUMP_FULL] = netem_dump_full,
+ .qo_get_opts = netem_get_opts,
+};
+
+static void __init netem_init(void)
+{
+ rtnl_qdisc_register(&netem_ops);
+}
+
+static void __exit netem_exit(void)
+{
+ rtnl_qdisc_unregister(&netem_ops);
+}
+
+/** @} */
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