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213 lines
6.5 KiB
213 lines
6.5 KiB
/*
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* Codel - The Controlled-Delay Active Queue Management algorithm
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*
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* Copyright (C) 2011-2012 Kathleen Nichols <nichols@pollere.com>
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* Copyright (C) 2011-2012 Van Jacobson <van@pollere.com>
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* Copyright (C) 2012 Michael D. Taht <dave.taht@bufferbloat.net>
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* Copyright (C) 2012,2015 Eric Dumazet <edumazet@google.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, provided that this notice is retained in full, this
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* software may be distributed under the terms of the GNU General
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* Public License ("GPL") version 2, in which case the provisions of the
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* GPL apply INSTEAD OF those given above.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include "utils.h"
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#include "tc_util.h"
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static void explain(void)
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{
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fprintf(stderr, "Usage: ... codel [ limit PACKETS ] [ target TIME ]\n");
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fprintf(stderr, " [ interval TIME ] [ ecn | noecn ]\n");
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fprintf(stderr, " [ ce_threshold TIME ]\n");
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}
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static int codel_parse_opt(struct qdisc_util *qu, int argc, char **argv,
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struct nlmsghdr *n)
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{
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unsigned int limit = 0;
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unsigned int target = 0;
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unsigned int interval = 0;
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unsigned int ce_threshold = ~0U;
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int ecn = -1;
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struct rtattr *tail;
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while (argc > 0) {
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if (strcmp(*argv, "limit") == 0) {
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NEXT_ARG();
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if (get_unsigned(&limit, *argv, 0)) {
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fprintf(stderr, "Illegal \"limit\"\n");
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return -1;
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}
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} else if (strcmp(*argv, "target") == 0) {
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NEXT_ARG();
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if (get_time(&target, *argv)) {
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fprintf(stderr, "Illegal \"target\"\n");
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return -1;
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}
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} else if (strcmp(*argv, "ce_threshold") == 0) {
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NEXT_ARG();
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if (get_time(&ce_threshold, *argv)) {
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fprintf(stderr, "Illegal \"ce_threshold\"\n");
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return -1;
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}
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} else if (strcmp(*argv, "interval") == 0) {
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NEXT_ARG();
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if (get_time(&interval, *argv)) {
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fprintf(stderr, "Illegal \"interval\"\n");
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return -1;
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}
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} else if (strcmp(*argv, "ecn") == 0) {
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ecn = 1;
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} else if (strcmp(*argv, "noecn") == 0) {
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ecn = 0;
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} else if (strcmp(*argv, "help") == 0) {
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explain();
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return -1;
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} else {
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fprintf(stderr, "What is \"%s\"?\n", *argv);
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explain();
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return -1;
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}
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argc--; argv++;
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}
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tail = NLMSG_TAIL(n);
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addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
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if (limit)
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addattr_l(n, 1024, TCA_CODEL_LIMIT, &limit, sizeof(limit));
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if (interval)
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addattr_l(n, 1024, TCA_CODEL_INTERVAL, &interval, sizeof(interval));
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if (target)
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addattr_l(n, 1024, TCA_CODEL_TARGET, &target, sizeof(target));
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if (ecn != -1)
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addattr_l(n, 1024, TCA_CODEL_ECN, &ecn, sizeof(ecn));
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if (ce_threshold != ~0U)
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addattr_l(n, 1024, TCA_CODEL_CE_THRESHOLD,
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&ce_threshold, sizeof(ce_threshold));
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tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
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return 0;
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}
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static int codel_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
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{
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struct rtattr *tb[TCA_CODEL_MAX + 1];
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unsigned int limit;
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unsigned int interval;
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unsigned int target;
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unsigned int ecn;
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unsigned int ce_threshold;
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SPRINT_BUF(b1);
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if (opt == NULL)
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return 0;
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parse_rtattr_nested(tb, TCA_CODEL_MAX, opt);
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if (tb[TCA_CODEL_LIMIT] &&
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RTA_PAYLOAD(tb[TCA_CODEL_LIMIT]) >= sizeof(__u32)) {
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limit = rta_getattr_u32(tb[TCA_CODEL_LIMIT]);
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fprintf(f, "limit %up ", limit);
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}
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if (tb[TCA_CODEL_TARGET] &&
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RTA_PAYLOAD(tb[TCA_CODEL_TARGET]) >= sizeof(__u32)) {
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target = rta_getattr_u32(tb[TCA_CODEL_TARGET]);
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fprintf(f, "target %s ", sprint_time(target, b1));
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}
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if (tb[TCA_CODEL_CE_THRESHOLD] &&
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RTA_PAYLOAD(tb[TCA_CODEL_CE_THRESHOLD]) >= sizeof(__u32)) {
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ce_threshold = rta_getattr_u32(tb[TCA_CODEL_CE_THRESHOLD]);
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fprintf(f, "ce_threshold %s ", sprint_time(ce_threshold, b1));
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}
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if (tb[TCA_CODEL_INTERVAL] &&
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RTA_PAYLOAD(tb[TCA_CODEL_INTERVAL]) >= sizeof(__u32)) {
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interval = rta_getattr_u32(tb[TCA_CODEL_INTERVAL]);
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fprintf(f, "interval %s ", sprint_time(interval, b1));
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}
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if (tb[TCA_CODEL_ECN] &&
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RTA_PAYLOAD(tb[TCA_CODEL_ECN]) >= sizeof(__u32)) {
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ecn = rta_getattr_u32(tb[TCA_CODEL_ECN]);
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if (ecn)
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fprintf(f, "ecn ");
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}
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return 0;
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}
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static int codel_print_xstats(struct qdisc_util *qu, FILE *f,
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struct rtattr *xstats)
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{
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struct tc_codel_xstats _st = {}, *st;
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SPRINT_BUF(b1);
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if (xstats == NULL)
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return 0;
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st = RTA_DATA(xstats);
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if (RTA_PAYLOAD(xstats) < sizeof(*st)) {
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memcpy(&_st, st, RTA_PAYLOAD(xstats));
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st = &_st;
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}
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fprintf(f, " count %u lastcount %u ldelay %s",
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st->count, st->lastcount, sprint_time(st->ldelay, b1));
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if (st->dropping)
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fprintf(f, " dropping");
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if (st->drop_next < 0)
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fprintf(f, " drop_next -%s", sprint_time(-st->drop_next, b1));
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else
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fprintf(f, " drop_next %s", sprint_time(st->drop_next, b1));
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fprintf(f, "\n maxpacket %u ecn_mark %u drop_overlimit %u",
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st->maxpacket, st->ecn_mark, st->drop_overlimit);
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if (st->ce_mark)
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fprintf(f, " ce_mark %u", st->ce_mark);
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return 0;
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}
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struct qdisc_util codel_qdisc_util = {
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.id = "codel",
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.parse_qopt = codel_parse_opt,
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.print_qopt = codel_print_opt,
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.print_xstats = codel_print_xstats,
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};
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