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-rw-r--r--tc/q_netem.c838
1 files changed, 838 insertions, 0 deletions
diff --git a/tc/q_netem.c b/tc/q_netem.c
new file mode 100644
index 0000000..26402e9
--- /dev/null
+++ b/tc/q_netem.c
@@ -0,0 +1,838 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Author: Stephen Hemminger <shemminger@linux-foundation.org>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <errno.h>
+
+#include "utils.h"
+#include "tc_util.h"
+#include "tc_common.h"
+
+static void explain(void)
+{
+ fprintf(stderr,
+ "Usage: ... netem [ limit PACKETS ]\n"
+ " [ delay TIME [ JITTER [CORRELATION]]]\n"
+ " [ distribution {uniform|normal|pareto|paretonormal} ]\n"
+ " [ corrupt PERCENT [CORRELATION]]\n"
+ " [ duplicate PERCENT [CORRELATION]]\n"
+ " [ loss random PERCENT [CORRELATION]]\n"
+ " [ loss state P13 [P31 [P32 [P23 P14]]]\n"
+ " [ loss gemodel PERCENT [R [1-H [1-K]]]\n"
+ " [ ecn ]\n"
+ " [ reorder PERCENT [CORRELATION] [ gap DISTANCE ]]\n"
+ " [ rate RATE [PACKETOVERHEAD] [CELLSIZE] [CELLOVERHEAD]]\n"
+ " [ slot MIN_DELAY [MAX_DELAY] [packets MAX_PACKETS] [bytes MAX_BYTES]]\n"
+ " [ slot distribution {uniform|normal|pareto|paretonormal|custom}\n"
+ " DELAY JITTER [packets MAX_PACKETS] [bytes MAX_BYTES]]\n");
+}
+
+static void explain1(const char *arg)
+{
+ fprintf(stderr, "Illegal \"%s\"\n", arg);
+}
+
+/* Upper bound on size of distribution
+ * really (TCA_BUF_MAX - other headers) / sizeof (__s16)
+ */
+#define MAX_DIST (16*1024)
+
+/* Print values only if they are non-zero */
+static void __attribute__((format(printf, 2, 0)))
+__print_int_opt(const char *label_json, const char *label_fp, int val)
+{
+ print_int(PRINT_JSON, label_json, NULL, val);
+ if (val != 0)
+ print_int(PRINT_FP, NULL, label_fp, val);
+}
+#define PRINT_INT_OPT(label, val) \
+ __print_int_opt(label, " " label " %d", (val))
+
+/* Time print prints normally with varying units, but for JSON prints
+ * in seconds (1ms vs 0.001).
+ */
+static void __attribute__((format(printf, 2, 0)))
+__print_time64(const char *label_json, const char *label_fp, __u64 val)
+{
+ SPRINT_BUF(b1);
+
+ print_string(PRINT_FP, NULL, label_fp, sprint_time64(val, b1));
+ print_float(PRINT_JSON, label_json, NULL, val / 1000000000.);
+}
+#define __PRINT_TIME64(label_json, label_fp, val) \
+ __print_time64(label_json, label_fp " %s", (val))
+#define PRINT_TIME64(label, val) __PRINT_TIME64(label, " " label, (val))
+
+/* Percent print prints normally in percentage points, but for JSON prints
+ * an absolute value (1% vs 0.01).
+ */
+static void __attribute__((format(printf, 2, 0)))
+__print_percent(const char *label_json, const char *label_fp, __u32 per)
+{
+ print_float(PRINT_FP, NULL, label_fp, (100. * per) / UINT32_MAX);
+ print_float(PRINT_JSON, label_json, NULL, (1. * per) / UINT32_MAX);
+}
+#define __PRINT_PERCENT(label_json, label_fp, per) \
+ __print_percent(label_json, label_fp " %g%%", (per))
+#define PRINT_PERCENT(label, per) __PRINT_PERCENT(label, " " label, (per))
+
+/* scaled value used to percent of maximum. */
+static void set_percent(__u32 *percent, double per)
+{
+ *percent = rint(per * UINT32_MAX);
+}
+
+static int get_percent(__u32 *percent, const char *str)
+{
+ double per;
+
+ if (parse_percent(&per, str))
+ return -1;
+
+ set_percent(percent, per);
+ return 0;
+}
+
+static void print_corr(bool present, __u32 value)
+{
+ if (!is_json_context()) {
+ if (present)
+ __PRINT_PERCENT("", "", value);
+ } else {
+ PRINT_PERCENT("correlation", value);
+ }
+}
+
+/*
+ * Simplistic file parser for distrbution data.
+ * Format is:
+ * # comment line(s)
+ * data0 data1 ...
+ */
+static int get_distribution(const char *type, __s16 *data, int maxdata)
+{
+ FILE *f;
+ int n;
+ long x;
+ size_t len;
+ char *line = NULL;
+ char name[128];
+
+ snprintf(name, sizeof(name), "%s/%s.dist", get_tc_lib(), type);
+ f = fopen(name, "r");
+ if (f == NULL) {
+ fprintf(stderr, "No distribution data for %s (%s: %s)\n",
+ type, name, strerror(errno));
+ return -1;
+ }
+
+ n = 0;
+ while (getline(&line, &len, f) != -1) {
+ char *p, *endp;
+
+ if (*line == '\n' || *line == '#')
+ continue;
+
+ for (p = line; ; p = endp) {
+ x = strtol(p, &endp, 0);
+ if (endp == p)
+ break;
+
+ if (n >= maxdata) {
+ fprintf(stderr, "%s: too much data\n",
+ name);
+ n = -1;
+ goto error;
+ }
+ data[n++] = x;
+ }
+ }
+ error:
+ free(line);
+ fclose(f);
+ return n;
+}
+
+#define NEXT_IS_NUMBER() (NEXT_ARG_OK() && isdigit(argv[1][0]))
+#define NEXT_IS_SIGNED_NUMBER() \
+ (NEXT_ARG_OK() && (isdigit(argv[1][0]) || argv[1][0] == '-'))
+
+/*
+ * Adjust for the fact that psched_ticks aren't always usecs
+ * (based on kernel PSCHED_CLOCK configuration
+ */
+static int get_ticks(__u32 *ticks, const char *str)
+{
+ unsigned int t;
+
+ if (get_time(&t, str))
+ return -1;
+
+ if (tc_core_time2big(t)) {
+ fprintf(stderr, "Illegal %u time (too large)\n", t);
+ return -1;
+ }
+
+ *ticks = tc_core_time2tick(t);
+ return 0;
+}
+
+static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv,
+ struct nlmsghdr *n, const char *dev)
+{
+ int dist_size = 0;
+ int slot_dist_size = 0;
+ struct rtattr *tail;
+ struct tc_netem_qopt opt = { .limit = 1000 };
+ struct tc_netem_corr cor = {};
+ struct tc_netem_reorder reorder = {};
+ struct tc_netem_corrupt corrupt = {};
+ struct tc_netem_gimodel gimodel;
+ struct tc_netem_gemodel gemodel;
+ struct tc_netem_rate rate = {};
+ struct tc_netem_slot slot = {};
+ __s16 *dist_data = NULL;
+ __s16 *slot_dist_data = NULL;
+ __u16 loss_type = NETEM_LOSS_UNSPEC;
+ int present[__TCA_NETEM_MAX] = {};
+ __u64 rate64 = 0;
+
+ for ( ; argc > 0; --argc, ++argv) {
+ if (matches(*argv, "limit") == 0) {
+ NEXT_ARG();
+ if (get_size(&opt.limit, *argv)) {
+ explain1("limit");
+ return -1;
+ }
+ } else if (matches(*argv, "latency") == 0 ||
+ matches(*argv, "delay") == 0) {
+ NEXT_ARG();
+ if (get_ticks(&opt.latency, *argv)) {
+ explain1("latency");
+ return -1;
+ }
+
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ if (get_ticks(&opt.jitter, *argv)) {
+ explain1("latency");
+ return -1;
+ }
+
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ ++present[TCA_NETEM_CORR];
+ if (get_percent(&cor.delay_corr, *argv)) {
+ explain1("latency");
+ return -1;
+ }
+ }
+ }
+ } else if (matches(*argv, "loss") == 0 ||
+ matches(*argv, "drop") == 0) {
+ if (opt.loss > 0 || loss_type != NETEM_LOSS_UNSPEC) {
+ explain1("duplicate loss argument\n");
+ return -1;
+ }
+
+ NEXT_ARG();
+ /* Old (deprecated) random loss model syntax */
+ if (isdigit(argv[0][0]))
+ goto random_loss_model;
+
+ if (!strcmp(*argv, "random")) {
+ NEXT_ARG();
+random_loss_model:
+ if (get_percent(&opt.loss, *argv)) {
+ explain1("loss percent");
+ return -1;
+ }
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ ++present[TCA_NETEM_CORR];
+ if (get_percent(&cor.loss_corr, *argv)) {
+ explain1("loss correlation");
+ return -1;
+ }
+ }
+ } else if (!strcmp(*argv, "state")) {
+ double p13;
+
+ NEXT_ARG();
+ if (parse_percent(&p13, *argv)) {
+ explain1("loss p13");
+ return -1;
+ }
+
+ /* set defaults */
+ set_percent(&gimodel.p13, p13);
+ set_percent(&gimodel.p31, 1. - p13);
+ set_percent(&gimodel.p32, 0);
+ set_percent(&gimodel.p23, 1.);
+ set_percent(&gimodel.p14, 0);
+ loss_type = NETEM_LOSS_GI;
+
+ if (!NEXT_IS_NUMBER())
+ continue;
+ NEXT_ARG();
+ if (get_percent(&gimodel.p31, *argv)) {
+ explain1("loss p31");
+ return -1;
+ }
+
+ if (!NEXT_IS_NUMBER())
+ continue;
+ NEXT_ARG();
+ if (get_percent(&gimodel.p32, *argv)) {
+ explain1("loss p32");
+ return -1;
+ }
+
+ if (!NEXT_IS_NUMBER())
+ continue;
+ NEXT_ARG();
+ if (get_percent(&gimodel.p23, *argv)) {
+ explain1("loss p23");
+ return -1;
+ }
+ if (!NEXT_IS_NUMBER())
+ continue;
+ NEXT_ARG();
+ if (get_percent(&gimodel.p14, *argv)) {
+ explain1("loss p14");
+ return -1;
+ }
+
+ } else if (!strcmp(*argv, "gemodel")) {
+ double p;
+
+ NEXT_ARG();
+ if (parse_percent(&p, *argv)) {
+ explain1("loss gemodel p");
+ return -1;
+ }
+ set_percent(&gemodel.p, p);
+
+ /* set defaults */
+ set_percent(&gemodel.r, 1. - p);
+ set_percent(&gemodel.h, 0);
+ set_percent(&gemodel.k1, 0);
+ loss_type = NETEM_LOSS_GE;
+
+ if (!NEXT_IS_NUMBER())
+ continue;
+ NEXT_ARG();
+ if (get_percent(&gemodel.r, *argv)) {
+ explain1("loss gemodel r");
+ return -1;
+ }
+
+ if (!NEXT_IS_NUMBER())
+ continue;
+ NEXT_ARG();
+ if (get_percent(&gemodel.h, *argv)) {
+ explain1("loss gemodel h");
+ return -1;
+ }
+ /* netem option is "1-h" but kernel
+ * expects "h".
+ */
+ gemodel.h = UINT32_MAX - gemodel.h;
+
+ if (!NEXT_IS_NUMBER())
+ continue;
+ NEXT_ARG();
+ if (get_percent(&gemodel.k1, *argv)) {
+ explain1("loss gemodel k");
+ return -1;
+ }
+ } else {
+ fprintf(stderr, "Unknown loss parameter: %s\n",
+ *argv);
+ return -1;
+ }
+ } else if (matches(*argv, "ecn") == 0) {
+ present[TCA_NETEM_ECN] = 1;
+ } else if (matches(*argv, "reorder") == 0) {
+ NEXT_ARG();
+ present[TCA_NETEM_REORDER] = 1;
+ if (get_percent(&reorder.probability, *argv)) {
+ explain1("reorder");
+ return -1;
+ }
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ ++present[TCA_NETEM_CORR];
+ if (get_percent(&reorder.correlation, *argv)) {
+ explain1("reorder");
+ return -1;
+ }
+ }
+ } else if (matches(*argv, "corrupt") == 0) {
+ NEXT_ARG();
+ present[TCA_NETEM_CORRUPT] = 1;
+ if (get_percent(&corrupt.probability, *argv)) {
+ explain1("corrupt");
+ return -1;
+ }
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ ++present[TCA_NETEM_CORR];
+ if (get_percent(&corrupt.correlation, *argv)) {
+ explain1("corrupt");
+ return -1;
+ }
+ }
+ } else if (matches(*argv, "gap") == 0) {
+ NEXT_ARG();
+ if (get_u32(&opt.gap, *argv, 0)) {
+ explain1("gap");
+ return -1;
+ }
+ } else if (matches(*argv, "duplicate") == 0) {
+ NEXT_ARG();
+ if (get_percent(&opt.duplicate, *argv)) {
+ explain1("duplicate");
+ return -1;
+ }
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ if (get_percent(&cor.dup_corr, *argv)) {
+ explain1("duplicate");
+ return -1;
+ }
+ }
+ } else if (matches(*argv, "distribution") == 0) {
+ NEXT_ARG();
+ dist_data = calloc(sizeof(dist_data[0]), MAX_DIST);
+ dist_size = get_distribution(*argv, dist_data, MAX_DIST);
+ if (dist_size <= 0) {
+ free(dist_data);
+ return -1;
+ }
+ } else if (matches(*argv, "rate") == 0) {
+ ++present[TCA_NETEM_RATE];
+ NEXT_ARG();
+ if (strchr(*argv, '%')) {
+ if (get_percent_rate64(&rate64, *argv, dev)) {
+ explain1("rate");
+ return -1;
+ }
+ } else if (get_rate64(&rate64, *argv)) {
+ explain1("rate");
+ return -1;
+ }
+ if (NEXT_IS_SIGNED_NUMBER()) {
+ NEXT_ARG();
+ if (get_s32(&rate.packet_overhead, *argv, 0)) {
+ explain1("rate");
+ return -1;
+ }
+ }
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ if (get_u32(&rate.cell_size, *argv, 0)) {
+ explain1("rate");
+ return -1;
+ }
+ }
+ if (NEXT_IS_SIGNED_NUMBER()) {
+ NEXT_ARG();
+ if (get_s32(&rate.cell_overhead, *argv, 0)) {
+ explain1("rate");
+ return -1;
+ }
+ }
+ } else if (matches(*argv, "slot") == 0) {
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ present[TCA_NETEM_SLOT] = 1;
+ if (get_time64(&slot.min_delay, *argv)) {
+ explain1("slot min_delay");
+ return -1;
+ }
+ if (NEXT_IS_NUMBER()) {
+ NEXT_ARG();
+ if (get_time64(&slot.max_delay, *argv) ||
+ slot.max_delay < slot.min_delay) {
+ explain1("slot max_delay");
+ return -1;
+ }
+ } else {
+ slot.max_delay = slot.min_delay;
+ }
+ } else {
+ NEXT_ARG();
+ if (strcmp(*argv, "distribution") == 0) {
+ present[TCA_NETEM_SLOT] = 1;
+ NEXT_ARG();
+ slot_dist_data = calloc(sizeof(slot_dist_data[0]), MAX_DIST);
+ if (!slot_dist_data)
+ return -1;
+ slot_dist_size = get_distribution(*argv, slot_dist_data, MAX_DIST);
+ if (slot_dist_size <= 0) {
+ free(slot_dist_data);
+ return -1;
+ }
+ NEXT_ARG();
+ if (get_time64(&slot.dist_delay, *argv)) {
+ explain1("slot delay");
+ return -1;
+ }
+ NEXT_ARG();
+ if (get_time64(&slot.dist_jitter, *argv)) {
+ explain1("slot jitter");
+ return -1;
+ }
+ if (slot.dist_jitter <= 0) {
+ fprintf(stderr, "Non-positive jitter\n");
+ return -1;
+ }
+ } else {
+ fprintf(stderr, "Unknown slot parameter: %s\n",
+ *argv);
+ return -1;
+ }
+ }
+ if (NEXT_ARG_OK() &&
+ matches(*(argv+1), "packets") == 0) {
+ NEXT_ARG();
+ if (!NEXT_ARG_OK() ||
+ get_s32(&slot.max_packets, *(argv+1), 0)) {
+ explain1("slot packets");
+ return -1;
+ }
+ NEXT_ARG();
+ }
+ if (NEXT_ARG_OK() &&
+ matches(*(argv+1), "bytes") == 0) {
+ unsigned int max_bytes;
+
+ NEXT_ARG();
+ if (!NEXT_ARG_OK() ||
+ get_size(&max_bytes, *(argv+1))) {
+ explain1("slot bytes");
+ return -1;
+ }
+ slot.max_bytes = (int) max_bytes;
+ NEXT_ARG();
+ }
+ } else {
+ if (strcmp(*argv, "help") != 0)
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ }
+
+ tail = NLMSG_TAIL(n);
+
+ if (reorder.probability) {
+ if (opt.latency == 0) {
+ fprintf(stderr, "reordering not possible without specifying some delay\n");
+ explain();
+ return -1;
+ }
+ if (opt.gap == 0)
+ opt.gap = 1;
+ } else if (opt.gap > 0) {
+ fprintf(stderr, "gap specified without reorder probability\n");
+ explain();
+ return -1;
+ }
+
+ if (present[TCA_NETEM_ECN]) {
+ if (opt.loss <= 0 && loss_type == NETEM_LOSS_UNSPEC) {
+ fprintf(stderr, "ecn requested without loss model\n");
+ explain();
+ return -1;
+ }
+ }
+
+ if (dist_data && (opt.latency == 0 || opt.jitter == 0)) {
+ fprintf(stderr, "distribution specified but no latency and jitter values\n");
+ explain();
+ return -1;
+ }
+
+ if (addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)) < 0)
+ return -1;
+
+ if (present[TCA_NETEM_CORR] &&
+ addattr_l(n, 1024, TCA_NETEM_CORR, &cor, sizeof(cor)) < 0)
+ return -1;
+
+ if (present[TCA_NETEM_REORDER] &&
+ addattr_l(n, 1024, TCA_NETEM_REORDER, &reorder, sizeof(reorder)) < 0)
+ return -1;
+
+ if (present[TCA_NETEM_ECN] &&
+ addattr_l(n, 1024, TCA_NETEM_ECN, &present[TCA_NETEM_ECN],
+ sizeof(present[TCA_NETEM_ECN])) < 0)
+ return -1;
+
+ if (present[TCA_NETEM_CORRUPT] &&
+ addattr_l(n, 1024, TCA_NETEM_CORRUPT, &corrupt, sizeof(corrupt)) < 0)
+ return -1;
+
+ if (present[TCA_NETEM_SLOT] &&
+ addattr_l(n, 1024, TCA_NETEM_SLOT, &slot, sizeof(slot)) < 0)
+ return -1;
+
+ if (loss_type != NETEM_LOSS_UNSPEC) {
+ struct rtattr *start;
+
+ start = addattr_nest(n, 1024, TCA_NETEM_LOSS | NLA_F_NESTED);
+ if (loss_type == NETEM_LOSS_GI) {
+ if (addattr_l(n, 1024, NETEM_LOSS_GI,
+ &gimodel, sizeof(gimodel)) < 0)
+ return -1;
+ } else if (loss_type == NETEM_LOSS_GE) {
+ if (addattr_l(n, 1024, NETEM_LOSS_GE,
+ &gemodel, sizeof(gemodel)) < 0)
+ return -1;
+ } else {
+ fprintf(stderr, "loss in the weeds!\n");
+ return -1;
+ }
+
+ addattr_nest_end(n, start);
+ }
+
+ if (present[TCA_NETEM_RATE]) {
+ if (rate64 >= (1ULL << 32)) {
+ if (addattr_l(n, 1024,
+ TCA_NETEM_RATE64, &rate64, sizeof(rate64)) < 0)
+ return -1;
+ rate.rate = ~0U;
+ } else {
+ rate.rate = rate64;
+ }
+ if (addattr_l(n, 1024, TCA_NETEM_RATE, &rate, sizeof(rate)) < 0)
+ return -1;
+ }
+
+ if (dist_data) {
+ if (addattr_l(n, MAX_DIST * sizeof(dist_data[0]),
+ TCA_NETEM_DELAY_DIST,
+ dist_data, dist_size * sizeof(dist_data[0])) < 0)
+ return -1;
+ free(dist_data);
+ }
+
+ if (slot_dist_data) {
+ if (addattr_l(n, MAX_DIST * sizeof(slot_dist_data[0]),
+ TCA_NETEM_SLOT_DIST,
+ slot_dist_data, slot_dist_size * sizeof(slot_dist_data[0])) < 0)
+ return -1;
+ free(slot_dist_data);
+ }
+ tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
+ return 0;
+}
+
+static int netem_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
+{
+ const struct tc_netem_corr *cor = NULL;
+ const struct tc_netem_reorder *reorder = NULL;
+ const struct tc_netem_corrupt *corrupt = NULL;
+ const struct tc_netem_gimodel *gimodel = NULL;
+ const struct tc_netem_gemodel *gemodel = NULL;
+ int *ecn = NULL;
+ struct tc_netem_qopt qopt;
+ const struct tc_netem_rate *rate = NULL;
+ const struct tc_netem_slot *slot = NULL;
+ int len;
+ __u64 rate64 = 0;
+
+ SPRINT_BUF(b1);
+
+ if (opt == NULL)
+ return 0;
+
+ len = RTA_PAYLOAD(opt) - sizeof(qopt);
+ if (len < 0) {
+ fprintf(stderr, "options size error\n");
+ return -1;
+ }
+ memcpy(&qopt, RTA_DATA(opt), sizeof(qopt));
+
+ if (len > 0) {
+ struct rtattr *tb[TCA_NETEM_MAX+1];
+
+ parse_rtattr(tb, TCA_NETEM_MAX, RTA_DATA(opt) + sizeof(qopt),
+ len);
+
+ if (tb[TCA_NETEM_CORR]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_CORR]) < sizeof(*cor))
+ return -1;
+ cor = RTA_DATA(tb[TCA_NETEM_CORR]);
+ }
+ if (tb[TCA_NETEM_REORDER]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_REORDER]) < sizeof(*reorder))
+ return -1;
+ reorder = RTA_DATA(tb[TCA_NETEM_REORDER]);
+ }
+ if (tb[TCA_NETEM_CORRUPT]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_CORRUPT]) < sizeof(*corrupt))
+ return -1;
+ corrupt = RTA_DATA(tb[TCA_NETEM_CORRUPT]);
+ }
+ if (tb[TCA_NETEM_LOSS]) {
+ struct rtattr *lb[NETEM_LOSS_MAX + 1];
+
+ parse_rtattr_nested(lb, NETEM_LOSS_MAX, tb[TCA_NETEM_LOSS]);
+ if (lb[NETEM_LOSS_GI])
+ gimodel = RTA_DATA(lb[NETEM_LOSS_GI]);
+ if (lb[NETEM_LOSS_GE])
+ gemodel = RTA_DATA(lb[NETEM_LOSS_GE]);
+ }
+ if (tb[TCA_NETEM_RATE]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_RATE]) < sizeof(*rate))
+ return -1;
+ rate = RTA_DATA(tb[TCA_NETEM_RATE]);
+ }
+ if (tb[TCA_NETEM_ECN]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_ECN]) < sizeof(*ecn))
+ return -1;
+ ecn = RTA_DATA(tb[TCA_NETEM_ECN]);
+ }
+ if (tb[TCA_NETEM_RATE64]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_RATE64]) < sizeof(rate64))
+ return -1;
+ rate64 = rta_getattr_u64(tb[TCA_NETEM_RATE64]);
+ }
+ if (tb[TCA_NETEM_SLOT]) {
+ if (RTA_PAYLOAD(tb[TCA_NETEM_SLOT]) < sizeof(*slot))
+ return -1;
+ slot = RTA_DATA(tb[TCA_NETEM_SLOT]);
+ }
+ }
+
+ print_uint(PRINT_ANY, "limit", "limit %d", qopt.limit);
+
+ if (qopt.latency) {
+ open_json_object("delay");
+ if (!is_json_context()) {
+ print_string(PRINT_FP, NULL, " delay %s",
+ sprint_ticks(qopt.latency, b1));
+
+ if (qopt.jitter)
+ print_string(PRINT_FP, NULL, " %s",
+ sprint_ticks(qopt.jitter, b1));
+ } else {
+ print_float(PRINT_JSON, "delay", NULL,
+ tc_core_tick2time(qopt.latency) /
+ 1000000.);
+ print_float(PRINT_JSON, "jitter", NULL,
+ tc_core_tick2time(qopt.jitter) /
+ 1000000.);
+ }
+ print_corr(qopt.jitter && cor && cor->delay_corr,
+ cor ? cor->delay_corr : 0);
+ close_json_object();
+ }
+
+ if (qopt.loss) {
+ open_json_object("loss-random");
+ PRINT_PERCENT("loss", qopt.loss);
+ print_corr(cor && cor->loss_corr, cor ? cor->loss_corr : 0);
+ close_json_object();
+ }
+
+ if (gimodel) {
+ open_json_object("loss-state");
+ __PRINT_PERCENT("p13", " loss state p13", gimodel->p13);
+ PRINT_PERCENT("p31", gimodel->p31);
+ PRINT_PERCENT("p32", gimodel->p32);
+ PRINT_PERCENT("p23", gimodel->p23);
+ PRINT_PERCENT("p14", gimodel->p14);
+ close_json_object();
+ }
+
+ if (gemodel) {
+ open_json_object("loss-gemodel");
+ __PRINT_PERCENT("p", " loss gemodel p", gemodel->p);
+ PRINT_PERCENT("r", gemodel->r);
+ PRINT_PERCENT("1-h", UINT32_MAX - gemodel->h);
+ PRINT_PERCENT("1-k", gemodel->k1);
+ close_json_object();
+ }
+
+ if (qopt.duplicate) {
+ open_json_object("duplicate");
+ PRINT_PERCENT("duplicate", qopt.duplicate);
+ print_corr(cor && cor->dup_corr, cor ? cor->dup_corr : 0);
+ close_json_object();
+ }
+
+ if (reorder && reorder->probability) {
+ open_json_object("reorder");
+ PRINT_PERCENT("reorder", reorder->probability);
+ print_corr(reorder->correlation, reorder->correlation);
+ close_json_object();
+ }
+
+ if (corrupt && corrupt->probability) {
+ open_json_object("corrupt");
+ PRINT_PERCENT("corrupt", corrupt->probability);
+ print_corr(corrupt->correlation, corrupt->correlation);
+ close_json_object();
+ }
+
+ if (rate && rate->rate) {
+ open_json_object("rate");
+ rate64 = rate64 ? : rate->rate;
+ tc_print_rate(PRINT_ANY, "rate", " rate %s", rate64);
+ PRINT_INT_OPT("packetoverhead", rate->packet_overhead);
+
+ print_uint(PRINT_JSON, "cellsize", NULL, rate->cell_size);
+ if (rate->cell_size)
+ print_uint(PRINT_FP, NULL, " cellsize %u", rate->cell_size);
+ PRINT_INT_OPT("celloverhead", rate->cell_overhead);
+ close_json_object();
+ }
+
+ if (slot) {
+ open_json_object("slot");
+ if (slot->dist_jitter > 0) {
+ __PRINT_TIME64("distribution", " slot distribution",
+ slot->dist_delay);
+ __PRINT_TIME64("jitter", "", slot->dist_jitter);
+ } else {
+ __PRINT_TIME64("min-delay", " slot", slot->min_delay);
+ __PRINT_TIME64("max-delay", "", slot->max_delay);
+ }
+ PRINT_INT_OPT("packets", slot->max_packets);
+ PRINT_INT_OPT("bytes", slot->max_bytes);
+ close_json_object();
+ }
+
+ print_bool(PRINT_JSON, "ecn", NULL, ecn);
+ if (ecn)
+ print_bool(PRINT_FP, NULL, " ecn ", ecn);
+
+ print_luint(PRINT_JSON, "gap", NULL, qopt.gap);
+ if (qopt.gap)
+ print_luint(PRINT_FP, NULL, " gap %lu", qopt.gap);
+
+ return 0;
+}
+
+struct qdisc_util netem_qdisc_util = {
+ .id = "netem",
+ .parse_qopt = netem_parse_opt,
+ .print_qopt = netem_print_opt,
+};