1 /*
2 * q_sfq.c SFQ.
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
explain(void)26 static void explain(void)
27 {
28 fprintf(stderr, "Usage: ... sfq [ limit NUMBER ] [ perturb SECS ] [ quantum BYTES ]\n");
29 }
30
sfq_parse_opt(struct qdisc_util * qu,int argc,char ** argv,struct nlmsghdr * n)31 static int sfq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
32 {
33 int ok=0;
34 struct tc_sfq_qopt opt;
35
36 memset(&opt, 0, sizeof(opt));
37
38 while (argc > 0) {
39 if (strcmp(*argv, "quantum") == 0) {
40 NEXT_ARG();
41 if (get_size(&opt.quantum, *argv)) {
42 fprintf(stderr, "Illegal \"limit\"\n");
43 return -1;
44 }
45 ok++;
46 } else if (strcmp(*argv, "perturb") == 0) {
47 NEXT_ARG();
48 if (get_integer(&opt.perturb_period, *argv, 0)) {
49 fprintf(stderr, "Illegal \"perturb\"\n");
50 return -1;
51 }
52 ok++;
53 } else if (strcmp(*argv, "limit") == 0) {
54 NEXT_ARG();
55 if (get_u32(&opt.limit, *argv, 0)) {
56 fprintf(stderr, "Illegal \"limit\"\n");
57 return -1;
58 }
59 if (opt.limit < 2) {
60 fprintf(stderr, "Illegal \"limit\", must be > 1\n");
61 return -1;
62 }
63 ok++;
64 } else if (strcmp(*argv, "help") == 0) {
65 explain();
66 return -1;
67 } else {
68 fprintf(stderr, "What is \"%s\"?\n", *argv);
69 explain();
70 return -1;
71 }
72 argc--; argv++;
73 }
74
75 if (ok)
76 addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
77 return 0;
78 }
79
sfq_print_opt(struct qdisc_util * qu,FILE * f,struct rtattr * opt)80 static int sfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
81 {
82 struct tc_sfq_qopt *qopt;
83 SPRINT_BUF(b1);
84
85 if (opt == NULL)
86 return 0;
87
88 if (RTA_PAYLOAD(opt) < sizeof(*qopt))
89 return -1;
90 qopt = RTA_DATA(opt);
91 fprintf(f, "limit %up ", qopt->limit);
92 fprintf(f, "quantum %s ", sprint_size(qopt->quantum, b1));
93 if (show_details) {
94 fprintf(f, "flows %u/%u ", qopt->flows, qopt->divisor);
95 }
96 if (qopt->perturb_period)
97 fprintf(f, "perturb %dsec ", qopt->perturb_period);
98 return 0;
99 }
100
sfq_print_xstats(struct qdisc_util * qu,FILE * f,struct rtattr * xstats)101 static int sfq_print_xstats(struct qdisc_util *qu, FILE *f,
102 struct rtattr *xstats)
103 {
104 struct tc_sfq_xstats *st;
105
106 if (xstats == NULL)
107 return 0;
108 if (RTA_PAYLOAD(xstats) < sizeof(*st))
109 return -1;
110 st = RTA_DATA(xstats);
111
112 fprintf(f, " allot %d ", st->allot);
113 fprintf(f, "\n");
114 return 0;
115 }
116
117 struct qdisc_util sfq_qdisc_util = {
118 .id = "sfq",
119 .parse_qopt = sfq_parse_opt,
120 .print_qopt = sfq_print_opt,
121 .print_xstats = sfq_print_xstats,
122 };
123