osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 1 | /* |
| 2 | * q_red.c RED. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <unistd.h> |
| 16 | #include <syslog.h> |
| 17 | #include <fcntl.h> |
| 18 | #include <sys/socket.h> |
| 19 | #include <netinet/in.h> |
| 20 | #include <arpa/inet.h> |
| 21 | #include <string.h> |
| 22 | |
| 23 | #include "utils.h" |
| 24 | #include "tc_util.h" |
| 25 | |
| 26 | #include "tc_red.h" |
| 27 | |
| 28 | static void explain(void) |
| 29 | { |
| 30 | fprintf(stderr, "Usage: ... red limit BYTES min BYTES max BYTES avpkt BYTES burst PACKETS\n"); |
| 31 | fprintf(stderr, " probability PROBABILITY bandwidth KBPS [ ecn ]\n"); |
| 32 | } |
| 33 | |
| 34 | #define usage() return(-1) |
| 35 | |
| 36 | static int red_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n) |
| 37 | { |
| 38 | int ok=0; |
| 39 | struct tc_red_qopt opt; |
| 40 | unsigned burst = 0; |
| 41 | unsigned avpkt = 0; |
| 42 | double probability = 0.02; |
| 43 | unsigned rate = 0; |
| 44 | int ecn_ok = 0; |
| 45 | int wlog; |
| 46 | __u8 sbuf[256]; |
| 47 | struct rtattr *tail; |
| 48 | |
| 49 | memset(&opt, 0, sizeof(opt)); |
| 50 | |
| 51 | while (argc > 0) { |
| 52 | if (strcmp(*argv, "limit") == 0) { |
| 53 | NEXT_ARG(); |
| 54 | if (get_size(&opt.limit, *argv)) { |
| 55 | fprintf(stderr, "Illegal \"limit\"\n"); |
| 56 | return -1; |
| 57 | } |
| 58 | ok++; |
| 59 | } else if (strcmp(*argv, "min") == 0) { |
| 60 | NEXT_ARG(); |
| 61 | if (get_size(&opt.qth_min, *argv)) { |
| 62 | fprintf(stderr, "Illegal \"min\"\n"); |
| 63 | return -1; |
| 64 | } |
| 65 | ok++; |
| 66 | } else if (strcmp(*argv, "max") == 0) { |
| 67 | NEXT_ARG(); |
| 68 | if (get_size(&opt.qth_max, *argv)) { |
| 69 | fprintf(stderr, "Illegal \"max\"\n"); |
| 70 | return -1; |
| 71 | } |
| 72 | ok++; |
| 73 | } else if (strcmp(*argv, "burst") == 0) { |
| 74 | NEXT_ARG(); |
| 75 | if (get_unsigned(&burst, *argv, 0)) { |
| 76 | fprintf(stderr, "Illegal \"burst\"\n"); |
| 77 | return -1; |
| 78 | } |
| 79 | ok++; |
| 80 | } else if (strcmp(*argv, "avpkt") == 0) { |
| 81 | NEXT_ARG(); |
| 82 | if (get_size(&avpkt, *argv)) { |
| 83 | fprintf(stderr, "Illegal \"avpkt\"\n"); |
| 84 | return -1; |
| 85 | } |
| 86 | ok++; |
| 87 | } else if (strcmp(*argv, "probability") == 0) { |
| 88 | NEXT_ARG(); |
| 89 | if (sscanf(*argv, "%lg", &probability) != 1) { |
| 90 | fprintf(stderr, "Illegal \"probability\"\n"); |
| 91 | return -1; |
| 92 | } |
| 93 | ok++; |
| 94 | } else if (strcmp(*argv, "bandwidth") == 0) { |
| 95 | NEXT_ARG(); |
| 96 | if (get_rate(&rate, *argv)) { |
| 97 | fprintf(stderr, "Illegal \"bandwidth\"\n"); |
| 98 | return -1; |
| 99 | } |
| 100 | ok++; |
| 101 | } else if (strcmp(*argv, "ecn") == 0) { |
| 102 | ecn_ok = 1; |
| 103 | ok++; |
| 104 | } else if (strcmp(*argv, "help") == 0) { |
| 105 | explain(); |
| 106 | return -1; |
| 107 | } else { |
| 108 | fprintf(stderr, "What is \"%s\"?\n", *argv); |
| 109 | explain(); |
| 110 | return -1; |
| 111 | } |
| 112 | argc--; argv++; |
| 113 | } |
| 114 | |
| 115 | if (!ok) |
| 116 | return 0; |
| 117 | |
| 118 | if (rate == 0) |
| 119 | get_rate(&rate, "10Mbit"); |
| 120 | |
| 121 | if (!opt.qth_min || !opt.qth_max || !burst || !opt.limit || !avpkt) { |
| 122 | fprintf(stderr, "Required parameter (min, max, burst, limit, avpket) is missing\n"); |
| 123 | return -1; |
| 124 | } |
| 125 | |
| 126 | if ((wlog = tc_red_eval_ewma(opt.qth_min, burst, avpkt)) < 0) { |
| 127 | fprintf(stderr, "RED: failed to calculate EWMA constant.\n"); |
| 128 | return -1; |
| 129 | } |
| 130 | if (wlog >= 10) |
| 131 | fprintf(stderr, "RED: WARNING. Burst %d seems to be to large.\n", burst); |
| 132 | opt.Wlog = wlog; |
| 133 | if ((wlog = tc_red_eval_P(opt.qth_min, opt.qth_max, probability)) < 0) { |
| 134 | fprintf(stderr, "RED: failed to calculate probability.\n"); |
| 135 | return -1; |
| 136 | } |
| 137 | opt.Plog = wlog; |
| 138 | if ((wlog = tc_red_eval_idle_damping(opt.Wlog, avpkt, rate, sbuf)) < 0) { |
| 139 | fprintf(stderr, "RED: failed to calculate idle damping table.\n"); |
| 140 | return -1; |
| 141 | } |
| 142 | opt.Scell_log = wlog; |
| 143 | if (ecn_ok) { |
| 144 | #ifdef TC_RED_ECN |
| 145 | opt.flags |= TC_RED_ECN; |
| 146 | #else |
| 147 | fprintf(stderr, "RED: ECN support is missing in this binary.\n"); |
| 148 | return -1; |
| 149 | #endif |
| 150 | } |
| 151 | |
4!tgraf | 228569c | 2005-01-18 01:24:18 +0000 | [diff] [blame] | 152 | tail = NLMSG_TAIL(n); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 153 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); |
| 154 | addattr_l(n, 1024, TCA_RED_PARMS, &opt, sizeof(opt)); |
| 155 | addattr_l(n, 1024, TCA_RED_STAB, sbuf, 256); |
4!tgraf | 228569c | 2005-01-18 01:24:18 +0000 | [diff] [blame] | 156 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | static int red_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) |
| 161 | { |
| 162 | struct rtattr *tb[TCA_RED_STAB+1]; |
| 163 | struct tc_red_qopt *qopt; |
| 164 | SPRINT_BUF(b1); |
| 165 | SPRINT_BUF(b2); |
| 166 | SPRINT_BUF(b3); |
| 167 | |
| 168 | if (opt == NULL) |
| 169 | return 0; |
| 170 | |
4!tgraf | 3b3ecd3 | 2005-01-18 22:11:58 +0000 | [diff] [blame] | 171 | parse_rtattr_nested(tb, TCA_RED_STAB, opt); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 172 | |
| 173 | if (tb[TCA_RED_PARMS] == NULL) |
| 174 | return -1; |
| 175 | qopt = RTA_DATA(tb[TCA_RED_PARMS]); |
| 176 | if (RTA_PAYLOAD(tb[TCA_RED_PARMS]) < sizeof(*qopt)) |
| 177 | return -1; |
| 178 | fprintf(f, "limit %s min %s max %s ", |
| 179 | sprint_size(qopt->limit, b1), |
| 180 | sprint_size(qopt->qth_min, b2), |
| 181 | sprint_size(qopt->qth_max, b3)); |
| 182 | #ifdef TC_RED_ECN |
| 183 | if (qopt->flags & TC_RED_ECN) |
| 184 | fprintf(f, "ecn "); |
| 185 | #endif |
| 186 | if (show_details) { |
| 187 | fprintf(f, "ewma %u Plog %u Scell_log %u", |
| 188 | qopt->Wlog, qopt->Plog, qopt->Scell_log); |
| 189 | } |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static int red_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats) |
| 194 | { |
| 195 | #ifdef TC_RED_ECN |
| 196 | struct tc_red_xstats *st; |
| 197 | |
| 198 | if (xstats == NULL) |
| 199 | return 0; |
| 200 | |
| 201 | if (RTA_PAYLOAD(xstats) < sizeof(*st)) |
| 202 | return -1; |
| 203 | |
| 204 | st = RTA_DATA(xstats); |
| 205 | fprintf(f, " marked %u early %u pdrop %u other %u", |
| 206 | st->marked, st->early, st->pdrop, st->other); |
| 207 | return 0; |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 208 | |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 209 | #endif |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | |
net[shemminger]!kaber | 95812b5 | 2004-09-28 18:35:49 +0000 | [diff] [blame] | 214 | struct qdisc_util red_qdisc_util = { |
osdl.net!shemminger | f2f99e2 | 2004-08-31 17:45:21 +0000 | [diff] [blame] | 215 | .id = "red", |
| 216 | .parse_qopt = red_parse_opt, |
| 217 | .print_qopt = red_print_opt, |
| 218 | .print_xstats = red_print_xstats, |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 219 | }; |