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185d88f9 ED |
1 | /* |
2 | * Codel - The Controlled-Delay Active Queue Management algorithm | |
3 | * | |
4 | * Copyright (C) 2011-2012 Kathleen Nichols <nichols@pollere.com> | |
5 | * Copyright (C) 2011-2012 Van Jacobson <van@pollere.com> | |
6 | * Copyright (C) 2012 Michael D. Taht <dave.taht@bufferbloat.net> | |
7 | * Copyright (C) 2012 Eric Dumazet <edumazet@google.com> | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions, and the following disclaimer, | |
14 | * without modification. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. The names of the authors may not be used to endorse or promote products | |
19 | * derived from this software without specific prior written permission. | |
20 | * | |
21 | * Alternatively, provided that this notice is retained in full, this | |
22 | * software may be distributed under the terms of the GNU General | |
23 | * Public License ("GPL") version 2, in which case the provisions of the | |
24 | * GPL apply INSTEAD OF those given above. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
27 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
28 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
29 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
30 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
31 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
32 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
33 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
34 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
35 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
36 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH | |
37 | * DAMAGE. | |
38 | * | |
39 | */ | |
40 | ||
41 | #include <stdio.h> | |
42 | #include <stdlib.h> | |
43 | #include <unistd.h> | |
44 | #include <syslog.h> | |
45 | #include <fcntl.h> | |
46 | #include <sys/socket.h> | |
47 | #include <netinet/in.h> | |
48 | #include <arpa/inet.h> | |
49 | #include <string.h> | |
50 | ||
51 | #include "utils.h" | |
52 | #include "tc_util.h" | |
53 | ||
54 | static void explain(void) | |
55 | { | |
56 | fprintf(stderr, "Usage: ... codel [ limit PACKETS ] [ target TIME]\n"); | |
50a3ec3c | 57 | fprintf(stderr, " [ interval TIME ] [ ecn | noecn ]\n"); |
185d88f9 ED |
58 | } |
59 | ||
60 | static int codel_parse_opt(struct qdisc_util *qu, int argc, char **argv, | |
61 | struct nlmsghdr *n) | |
62 | { | |
63 | unsigned limit = 0; | |
64 | unsigned target = 0; | |
65 | unsigned interval = 0; | |
66 | int ecn = -1; | |
67 | struct rtattr *tail; | |
68 | ||
69 | while (argc > 0) { | |
70 | if (strcmp(*argv, "limit") == 0) { | |
71 | NEXT_ARG(); | |
72 | if (get_unsigned(&limit, *argv, 0)) { | |
73 | fprintf(stderr, "Illegal \"limit\"\n"); | |
74 | return -1; | |
75 | } | |
76 | } else if (strcmp(*argv, "target") == 0) { | |
77 | NEXT_ARG(); | |
78 | if (get_time(&target, *argv)) { | |
79 | fprintf(stderr, "Illegal \"target\"\n"); | |
80 | return -1; | |
81 | } | |
82 | } else if (strcmp(*argv, "interval") == 0) { | |
83 | NEXT_ARG(); | |
84 | if (get_time(&interval, *argv)) { | |
85 | fprintf(stderr, "Illegal \"interval\"\n"); | |
86 | return -1; | |
87 | } | |
88 | } else if (strcmp(*argv, "ecn") == 0) { | |
89 | ecn = 1; | |
90 | } else if (strcmp(*argv, "noecn") == 0) { | |
91 | ecn = 0; | |
92 | } else if (strcmp(*argv, "help") == 0) { | |
93 | explain(); | |
94 | return -1; | |
95 | } else { | |
96 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
97 | explain(); | |
98 | return -1; | |
99 | } | |
100 | argc--; argv++; | |
101 | } | |
102 | ||
103 | tail = NLMSG_TAIL(n); | |
104 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); | |
105 | if (limit) | |
106 | addattr_l(n, 1024, TCA_CODEL_LIMIT, &limit, sizeof(limit)); | |
107 | if (interval) | |
108 | addattr_l(n, 1024, TCA_CODEL_INTERVAL, &interval, sizeof(interval)); | |
109 | if (target) | |
110 | addattr_l(n, 1024, TCA_CODEL_TARGET, &target, sizeof(target)); | |
111 | if (ecn != -1) | |
112 | addattr_l(n, 1024, TCA_CODEL_ECN, &ecn, sizeof(ecn)); | |
113 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; | |
114 | return 0; | |
115 | } | |
116 | ||
117 | static int codel_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
118 | { | |
119 | struct rtattr *tb[TCA_CODEL_MAX + 1]; | |
120 | unsigned limit; | |
121 | unsigned interval; | |
122 | unsigned target; | |
123 | unsigned ecn; | |
124 | SPRINT_BUF(b1); | |
125 | ||
126 | if (opt == NULL) | |
127 | return 0; | |
128 | ||
129 | parse_rtattr_nested(tb, TCA_CODEL_MAX, opt); | |
130 | ||
131 | if (tb[TCA_CODEL_LIMIT] && | |
132 | RTA_PAYLOAD(tb[TCA_CODEL_LIMIT]) >= sizeof(__u32)) { | |
133 | limit = rta_getattr_u32(tb[TCA_CODEL_LIMIT]); | |
134 | fprintf(f, "limit %up ", limit); | |
135 | } | |
136 | if (tb[TCA_CODEL_TARGET] && | |
137 | RTA_PAYLOAD(tb[TCA_CODEL_TARGET]) >= sizeof(__u32)) { | |
138 | target = rta_getattr_u32(tb[TCA_CODEL_TARGET]); | |
139 | fprintf(f, "target %s ", sprint_time(target, b1)); | |
140 | } | |
141 | if (tb[TCA_CODEL_INTERVAL] && | |
142 | RTA_PAYLOAD(tb[TCA_CODEL_INTERVAL]) >= sizeof(__u32)) { | |
143 | interval = rta_getattr_u32(tb[TCA_CODEL_INTERVAL]); | |
144 | fprintf(f, "interval %s ", sprint_time(interval, b1)); | |
145 | } | |
146 | if (tb[TCA_CODEL_ECN] && | |
147 | RTA_PAYLOAD(tb[TCA_CODEL_ECN]) >= sizeof(__u32)) { | |
148 | ecn = rta_getattr_u32(tb[TCA_CODEL_ECN]); | |
149 | if (ecn) | |
150 | fprintf(f, "ecn "); | |
151 | } | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | static int codel_print_xstats(struct qdisc_util *qu, FILE *f, | |
157 | struct rtattr *xstats) | |
158 | { | |
159 | struct tc_codel_xstats *st; | |
160 | SPRINT_BUF(b1); | |
161 | ||
162 | if (xstats == NULL) | |
163 | return 0; | |
164 | ||
165 | if (RTA_PAYLOAD(xstats) < sizeof(*st)) | |
166 | return -1; | |
167 | ||
168 | st = RTA_DATA(xstats); | |
169 | fprintf(f, " count %u lastcount %u ldelay %s", | |
170 | st->count, st->lastcount, sprint_time(st->ldelay, b1)); | |
171 | if (st->dropping) | |
172 | fprintf(f, " dropping"); | |
173 | if (st->drop_next < 0) | |
174 | fprintf(f, " drop_next -%s", sprint_time(-st->drop_next, b1)); | |
175 | else | |
176 | fprintf(f, " drop_next %s", sprint_time(st->drop_next, b1)); | |
177 | fprintf(f, "\n maxpacket %u ecn_mark %u drop_overlimit %u", | |
178 | st->maxpacket, st->ecn_mark, st->drop_overlimit); | |
179 | return 0; | |
180 | ||
181 | } | |
182 | ||
183 | struct qdisc_util codel_qdisc_util = { | |
184 | .id = "codel", | |
185 | .parse_qopt = codel_parse_opt, | |
186 | .print_qopt = codel_print_opt, | |
187 | .print_xstats = codel_print_xstats, | |
188 | }; |