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
31 #define usage() return(-1)
32
sfq_parse_opt(struct qdisc_util * qu,int argc,char ** argv,struct nlmsghdr * n)33 static int sfq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
34 {
35 int ok=0;
36 struct tc_sfq_qopt opt;
37
38 memset(&opt, 0, sizeof(opt));
39
40 while (argc > 0) {
41 if (strcmp(*argv, "quantum") == 0) {
42 NEXT_ARG();
43 if (get_size(&opt.quantum, *argv)) {
44 fprintf(stderr, "Illegal \"limit\"\n");
45 return -1;
46 }
47 ok++;
48 } else if (strcmp(*argv, "perturb") == 0) {
49 NEXT_ARG();
50 if (get_integer(&opt.perturb_period, *argv, 0)) {
51 fprintf(stderr, "Illegal \"perturb\"\n");
52 return -1;
53 }
54 ok++;
55 } else if (strcmp(*argv, "limit") == 0) {
56 NEXT_ARG();
57 if (get_u32(&opt.limit, *argv, 0)) {
58 fprintf(stderr, "Illegal \"limit\"\n");
59 return -1;
60 }
61 if (opt.limit < 2) {
62 fprintf(stderr, "Illegal \"limit\", must be > 1\n");
63 return -1;
64 }
65 ok++;
66 } else if (strcmp(*argv, "help") == 0) {
67 explain();
68 return -1;
69 } else {
70 fprintf(stderr, "What is \"%s\"?\n", *argv);
71 explain();
72 return -1;
73 }
74 argc--; argv++;
75 }
76
77 if (ok)
78 addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
79 return 0;
80 }
81
sfq_print_opt(struct qdisc_util * qu,FILE * f,struct rtattr * opt)82 static int sfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
83 {
84 struct tc_sfq_qopt *qopt;
85 SPRINT_BUF(b1);
86
87 if (opt == NULL)
88 return 0;
89
90 if (RTA_PAYLOAD(opt) < sizeof(*qopt))
91 return -1;
92 qopt = RTA_DATA(opt);
93 fprintf(f, "limit %up ", qopt->limit);
94 fprintf(f, "quantum %s ", sprint_size(qopt->quantum, b1));
95 if (show_details) {
96 fprintf(f, "flows %u/%u ", qopt->flows, qopt->divisor);
97 }
98 if (qopt->perturb_period)
99 fprintf(f, "perturb %dsec ", qopt->perturb_period);
100 return 0;
101 }
102
sfq_print_xstats(struct qdisc_util * qu,FILE * f,struct rtattr * xstats)103 static int sfq_print_xstats(struct qdisc_util *qu, FILE *f,
104 struct rtattr *xstats)
105 {
106 struct tc_sfq_xstats *st;
107
108 if (xstats == NULL)
109 return 0;
110 if (RTA_PAYLOAD(xstats) < sizeof(*st))
111 return -1;
112 st = RTA_DATA(xstats);
113
114 fprintf(f, " allot %d ", st->allot);
115 fprintf(f, "\n");
116 return 0;
117 }
118
119 struct qdisc_util sfq_qdisc_util = {
120 .id = "sfq",
121 .parse_qopt = sfq_parse_opt,
122 .print_qopt = sfq_print_opt,
123 .print_xstats = sfq_print_xstats,
124 };
125