1 /*
2 * q_drr.c DRR.
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: Patrick McHardy <kaber@trash.net>
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: ... drr\n");
29 }
30
explain2(void)31 static void explain2(void)
32 {
33 fprintf(stderr, "Usage: ... drr quantum SIZE\n");
34 }
35
36
drr_parse_opt(struct qdisc_util * qu,int argc,char ** argv,struct nlmsghdr * n)37 static int drr_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
38 {
39 while (argc) {
40 if (strcmp(*argv, "help") == 0) {
41 explain();
42 return -1;
43 } else {
44 fprintf(stderr, "What is \"%s\"?\n", *argv);
45 explain();
46 return -1;
47 }
48 }
49 return 0;
50 }
51
drr_parse_class_opt(struct qdisc_util * qu,int argc,char ** argv,struct nlmsghdr * n)52 static int drr_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
53 struct nlmsghdr *n)
54 {
55 struct rtattr *tail;
56 __u32 tmp;
57
58 tail = NLMSG_TAIL(n);
59 addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
60
61 while (argc > 0) {
62 if (strcmp(*argv, "quantum") == 0) {
63 NEXT_ARG();
64 if (get_size(&tmp, *argv)) {
65 fprintf(stderr, "Illegal \"quantum\"\n");
66 return -1;
67 }
68 addattr_l(n, 1024, TCA_DRR_QUANTUM, &tmp, sizeof(tmp));
69 } else if (strcmp(*argv, "help") == 0) {
70 explain2();
71 return -1;
72 } else {
73 fprintf(stderr, "What is \"%s\"?\n", *argv);
74 explain2();
75 return -1;
76 }
77 argc--; argv++;
78 }
79
80 tail->rta_len = (void *) NLMSG_TAIL(n) - (void *)tail;
81 return 0;
82 }
83
drr_print_opt(struct qdisc_util * qu,FILE * f,struct rtattr * opt)84 static int drr_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
85 {
86 struct rtattr *tb[TCA_DRR_MAX + 1];
87 SPRINT_BUF(b1);
88
89 if (opt == NULL)
90 return 0;
91
92 parse_rtattr_nested(tb, TCA_DRR_MAX, opt);
93
94 if (tb[TCA_DRR_QUANTUM])
95 fprintf(f, "quantum %s ",
96 sprint_size(rta_getattr_u32(tb[TCA_DRR_QUANTUM]), b1));
97 return 0;
98 }
99
drr_print_xstats(struct qdisc_util * qu,FILE * f,struct rtattr * xstats)100 static int drr_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
101 {
102 struct tc_drr_stats *x;
103 SPRINT_BUF(b1);
104
105 if (xstats == NULL)
106 return 0;
107 if (RTA_PAYLOAD(xstats) < sizeof(*x))
108 return -1;
109 x = RTA_DATA(xstats);
110
111 fprintf(f, " deficit %s ", sprint_size(x->deficit, b1));
112 return 0;
113 }
114
115 struct qdisc_util drr_qdisc_util = {
116 .id = "drr",
117 .parse_qopt = drr_parse_opt,
118 .print_qopt = drr_print_opt,
119 .print_xstats = drr_print_xstats,
120 .parse_copt = drr_parse_class_opt,
121 .print_copt = drr_print_opt,
122 };
123