+++ /dev/null
-/*
- * q_red.c RED.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <string.h>
-
-#include "utils.h"
-#include "tc_util.h"
-
-#include "tc_red.h"
-
-static void explain(void)
-{
- fprintf(stderr, "Usage: ... red limit BYTES min BYTES max BYTES avpkt BYTES burst PACKETS\n");
- fprintf(stderr, " probability PROBABILITY bandwidth KBPS [ ecn ]\n");
-}
-
-#define usage() return(-1)
-
-static int red_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
-{
- int ok=0;
- struct tc_red_qopt opt;
- unsigned burst = 0;
- unsigned avpkt = 0;
- double probability = 0.02;
- unsigned rate = 0;
- int ecn_ok = 0;
- int wlog;
- __u8 sbuf[256];
- struct rtattr *tail;
-
- memset(&opt, 0, sizeof(opt));
-
- while (argc > 0) {
- if (strcmp(*argv, "limit") == 0) {
- NEXT_ARG();
- if (get_size(&opt.limit, *argv)) {
- fprintf(stderr, "Illegal \"limit\"\n");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "min") == 0) {
- NEXT_ARG();
- if (get_size(&opt.qth_min, *argv)) {
- fprintf(stderr, "Illegal \"min\"\n");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "max") == 0) {
- NEXT_ARG();
- if (get_size(&opt.qth_max, *argv)) {
- fprintf(stderr, "Illegal \"max\"\n");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "burst") == 0) {
- NEXT_ARG();
- if (get_unsigned(&burst, *argv, 0)) {
- fprintf(stderr, "Illegal \"burst\"\n");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "avpkt") == 0) {
- NEXT_ARG();
- if (get_size(&avpkt, *argv)) {
- fprintf(stderr, "Illegal \"avpkt\"\n");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "probability") == 0) {
- NEXT_ARG();
- if (sscanf(*argv, "%lg", &probability) != 1) {
- fprintf(stderr, "Illegal \"probability\"\n");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "bandwidth") == 0) {
- NEXT_ARG();
- if (get_rate(&rate, *argv)) {
- fprintf(stderr, "Illegal \"bandwidth\"\n");
- return -1;
- }
- ok++;
- } else if (strcmp(*argv, "ecn") == 0) {
- ecn_ok = 1;
- ok++;
- } else if (strcmp(*argv, "help") == 0) {
- explain();
- return -1;
- } else {
- fprintf(stderr, "What is \"%s\"?\n", *argv);
- explain();
- return -1;
- }
- argc--; argv++;
- }
-
- if (!ok)
- return 0;
-
- if (rate == 0)
- get_rate(&rate, "10Mbit");
-
- if (!opt.qth_min || !opt.qth_max || !burst || !opt.limit || !avpkt) {
- fprintf(stderr, "Required parameter (min, max, burst, limit, avpket) is missing\n");
- return -1;
- }
-
- if ((wlog = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) {
- fprintf(stderr, "RED: failed to calculate EWMA constant.\n");
- return -1;
- }
- if (wlog >= 10)
- fprintf(stderr, "RED: WARNING. Burst %d seems to be to large.\n", burst);
- opt.Wlog = wlog;
- if ((wlog = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) {
- fprintf(stderr, "RED: failed to calculate probability.\n");
- return -1;
- }
- opt.Plog = wlog;
- if ((wlog = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0) {
- fprintf(stderr, "RED: failed to calculate idle damping table.\n");
- return -1;
- }
- opt.Scell_log = wlog;
- if (ecn_ok) {
-#ifdef TC_RED_ECN
- opt.flags |= TC_RED_ECN;
-#else
- fprintf(stderr, "RED: ECN support is missing in this binary.\n");
- return -1;
-#endif
- }
-
- tail = NLMSG_TAIL(n);
- addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
- addattr_l(n, 1024, TCA_RED_PARMS, &opt, sizeof(opt));
- addattr_l(n, 1024, TCA_RED_STAB, sbuf, 256);
- tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
- return 0;
-}
-
-static int red_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
-{
- struct rtattr *tb[TCA_RED_STAB+1];
- struct tc_red_qopt *qopt;
- SPRINT_BUF(b1);
- SPRINT_BUF(b2);
- SPRINT_BUF(b3);
-
- if (opt == NULL)
- return 0;
-
- parse_rtattr_nested(tb, TCA_RED_STAB, opt);
-
- if (tb[TCA_RED_PARMS] == NULL)
- return -1;
- qopt = RTA_DATA(tb[TCA_RED_PARMS]);
- if (RTA_PAYLOAD(tb[TCA_RED_PARMS]) < sizeof(*qopt))
- return -1;
- fprintf(f, "limit %s min %s max %s ",
- sprint_size(qopt->limit, b1),
- sprint_size(qopt->qth_min, b2),
- sprint_size(qopt->qth_max, b3));
-#ifdef TC_RED_ECN
- if (qopt->flags & TC_RED_ECN)
- fprintf(f, "ecn ");
-#endif
- if (show_details) {
- fprintf(f, "ewma %u Plog %u Scell_log %u",
- qopt->Wlog, qopt->Plog, qopt->Scell_log);
- }
- return 0;
-}
-
-static int red_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
-{
-#ifdef TC_RED_ECN
- struct tc_red_xstats *st;
-
- if (xstats == NULL)
- return 0;
-
- if (RTA_PAYLOAD(xstats) < sizeof(*st))
- return -1;
-
- st = RTA_DATA(xstats);
- fprintf(f, " marked %u early %u pdrop %u other %u",
- st->marked, st->early, st->pdrop, st->other);
- return 0;
-
-#endif
- return 0;
-}
-
-
-struct qdisc_util red_qdisc_util = {
- .id = "red",
- .parse_qopt = red_parse_opt,
- .print_qopt = red_print_opt,
- .print_xstats = red_print_xstats,
-};
git://git.onelab.eu / iproute2.git / blobdiff