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
26static void explain(void)
27{
28	fprintf(stderr, "Usage: ... [p|b]fifo [ limit NUMBER ]\n");
29}
30
31#define usage() return(-1)
32
33static int fifo_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
34{
35	int ok=0;
36	struct tc_fifo_qopt opt;
37	memset(&opt, 0, sizeof(opt));
38
39	while (argc > 0) {
40		if (strcmp(*argv, "limit") == 0) {
41			NEXT_ARG();
42			if (get_size(&opt.limit, *argv)) {
43				fprintf(stderr, "Illegal \"limit\"\n");
44				return -1;
45			}
46			ok++;
47		} else if (strcmp(*argv, "help") == 0) {
48			explain();
49			return -1;
50		} else {
51			fprintf(stderr, "What is \"%s\"?\n", *argv);
52			explain();
53			return -1;
54		}
55		argc--; argv++;
56	}
57
58	if (ok)
59		addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt));
60	return 0;
61}
62
63static int fifo_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
64{
65	struct tc_fifo_qopt *qopt;
66
67	if (opt == NULL)
68		return 0;
69
70	if (RTA_PAYLOAD(opt)  < sizeof(*qopt))
71		return -1;
72	qopt = RTA_DATA(opt);
73	if (strcmp(qu->id, "bfifo") == 0) {
74		SPRINT_BUF(b1);
75		fprintf(f, "limit %s", sprint_size(qopt->limit, b1));
76	} else
77		fprintf(f, "limit %up", qopt->limit);
78	return 0;
79}
80
81
82struct qdisc_util bfifo_qdisc_util = {
83	.id = "bfifo",
84	.parse_qopt = fifo_parse_opt,
85	.print_qopt = fifo_print_opt,
86};
87
88struct qdisc_util pfifo_qdisc_util = {
89	.id = "pfifo",
90	.parse_qopt = fifo_parse_opt,
91	.print_qopt = fifo_print_opt,
92};
93
94extern int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt);
95struct qdisc_util pfifo_fast_qdisc_util = {
96	.id = "pfifo_fast",
97	.print_qopt = prio_print_opt,
98};
99