1 /*
2 * q_fifo.c FIFO.
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: ... <[p|b]fifo | pfifo_head_drop> [ limit NUMBER ]\n");
29 }
30
fifo_parse_opt(struct qdisc_util * qu,int argc,char ** argv,struct nlmsghdr * n)31 static int fifo_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
32 {
33 int ok=0;
34 struct tc_fifo_qopt opt;
35 memset(&opt, 0, sizeof(opt));
36
37 while (argc > 0) {
38 if (strcmp(*argv, "limit") == 0) {
39 NEXT_ARG();
40 if (get_size(&opt.limit, *argv)) {
41 fprintf(stderr, "%s: Illegal value for \"limit\": \"%s\"\n", qu->id, *argv);
42 return -1;
43 }
44 ok++;
45 } else if (strcmp(*argv, "help") == 0) {
46 explain();
47 return -1;
48 } else {
49 fprintf(stderr, "%s: unknown parameter \"%s\"\n", qu->id, *argv);
50 explain();
51 return -1;
52 }
53 argc--; argv++;
54 }
55
56 if (ok)
57 addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
58 return 0;
59 }
60
fifo_print_opt(struct qdisc_util * qu,FILE * f,struct rtattr * opt)61 static int fifo_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
62 {
63 struct tc_fifo_qopt *qopt;
64
65 if (opt == NULL)
66 return 0;
67
68 if (RTA_PAYLOAD(opt) < sizeof(*qopt))
69 return -1;
70 qopt = RTA_DATA(opt);
71 if (strcmp(qu->id, "bfifo") == 0) {
72 SPRINT_BUF(b1);
73 fprintf(f, "limit %s", sprint_size(qopt->limit, b1));
74 } else
75 fprintf(f, "limit %up", qopt->limit);
76 return 0;
77 }
78
79
80 struct qdisc_util bfifo_qdisc_util = {
81 .id = "bfifo",
82 .parse_qopt = fifo_parse_opt,
83 .print_qopt = fifo_print_opt,
84 };
85
86 struct qdisc_util pfifo_qdisc_util = {
87 .id = "pfifo",
88 .parse_qopt = fifo_parse_opt,
89 .print_qopt = fifo_print_opt,
90 };
91
92 struct qdisc_util pfifo_head_drop_qdisc_util = {
93 .id = "pfifo_head_drop",
94 .parse_qopt = fifo_parse_opt,
95 .print_qopt = fifo_print_opt,
96 };
97
98 extern int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt);
99 struct qdisc_util pfifo_fast_qdisc_util = {
100 .id = "pfifo_fast",
101 .print_qopt = prio_print_opt,
102 };
103