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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
28 static void explain(void)
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");
34 #define usage() return(-1)
36 static int red_parse_opt(struct qdisc_util
*qu
, int argc
, char **argv
, struct nlmsghdr
*n
)
39 struct tc_red_qopt opt
;
42 double probability
= 0.02;
49 memset(&opt
, 0, sizeof(opt
));
52 if (strcmp(*argv
, "limit") == 0) {
54 if (get_size(&opt
.limit
, *argv
)) {
55 fprintf(stderr
, "Illegal \"limit\"\n");
59 } else if (strcmp(*argv
, "min") == 0) {
61 if (get_size(&opt
.qth_min
, *argv
)) {
62 fprintf(stderr
, "Illegal \"min\"\n");
66 } else if (strcmp(*argv
, "max") == 0) {
68 if (get_size(&opt
.qth_max
, *argv
)) {
69 fprintf(stderr
, "Illegal \"max\"\n");
73 } else if (strcmp(*argv
, "burst") == 0) {
75 if (get_unsigned(&burst
, *argv
, 0)) {
76 fprintf(stderr
, "Illegal \"burst\"\n");
80 } else if (strcmp(*argv
, "avpkt") == 0) {
82 if (get_size(&avpkt
, *argv
)) {
83 fprintf(stderr
, "Illegal \"avpkt\"\n");
87 } else if (strcmp(*argv
, "probability") == 0) {
89 if (sscanf(*argv
, "%lg", &probability
) != 1) {
90 fprintf(stderr
, "Illegal \"probability\"\n");
94 } else if (strcmp(*argv
, "bandwidth") == 0) {
96 if (get_rate(&rate
, *argv
)) {
97 fprintf(stderr
, "Illegal \"bandwidth\"\n");
101 } else if (strcmp(*argv
, "ecn") == 0) {
104 } else if (strcmp(*argv
, "help") == 0) {
108 fprintf(stderr
, "What is \"%s\"?\n", *argv
);
119 get_rate(&rate
, "10Mbit");
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");
126 if ((wlog
= tc_red_eval_ewma(opt
.qth_min
, burst
, avpkt
)) < 0) {
127 fprintf(stderr
, "RED: failed to calculate EWMA constant.\n");
131 fprintf(stderr
, "RED: WARNING. Burst %d seems to be to large.\n", burst
);
133 if ((wlog
= tc_red_eval_P(opt
.qth_min
, opt
.qth_max
, probability
)) < 0) {
134 fprintf(stderr
, "RED: failed to calculate probability.\n");
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");
142 opt
.Scell_log
= wlog
;
145 opt
.flags
|= TC_RED_ECN
;
147 fprintf(stderr
, "RED: ECN support is missing in this binary.\n");
152 tail
= NLMSG_TAIL(n
);
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);
156 tail
->rta_len
= (void *) NLMSG_TAIL(n
) - (void *) tail
;
160 static int red_print_opt(struct qdisc_util
*qu
, FILE *f
, struct rtattr
*opt
)
162 struct rtattr
*tb
[TCA_RED_STAB
+1];
163 struct tc_red_qopt
*qopt
;
171 parse_rtattr_nested(tb
, TCA_RED_STAB
, opt
);
173 if (tb
[TCA_RED_PARMS
] == NULL
)
175 qopt
= RTA_DATA(tb
[TCA_RED_PARMS
]);
176 if (RTA_PAYLOAD(tb
[TCA_RED_PARMS
]) < sizeof(*qopt
))
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
));
183 if (qopt
->flags
& TC_RED_ECN
)
187 fprintf(f
, "ewma %u Plog %u Scell_log %u",
188 qopt
->Wlog
, qopt
->Plog
, qopt
->Scell_log
);
193 static int red_print_xstats(struct qdisc_util
*qu
, FILE *f
, struct rtattr
*xstats
)
196 struct tc_red_xstats
*st
;
201 if (RTA_PAYLOAD(xstats
) < sizeof(*st
))
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
);
214 struct qdisc_util red_qdisc_util
= {
216 .parse_qopt
= red_parse_opt
,
217 .print_qopt
= red_print_opt
,
218 .print_xstats
= red_print_xstats
,