1/*
2 * q_qfq.c	QFQ.
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:	Stephen Hemminger <shemminger@vyatta.com>
10 *		Fabio Checconi <fabio@gandalf.sssup.it>
11 *
12 */
13#include <syslog.h>
14#include <fcntl.h>
15#include <sys/socket.h>
16#include <netinet/in.h>
17#include <arpa/inet.h>
18#include <string.h>
19
20#include "utils.h"
21#include "tc_util.h"
22
23static void explain(void)
24{
25	fprintf(stderr, "Usage: ... qfq\n");
26}
27
28static void explain1(const char *arg)
29{
30	fprintf(stderr, "Illegal \"%s\"\n", arg);
31}
32
33static void explain_class(void)
34{
35	fprintf(stderr, "Usage: ... qfq weight NUMBER maxpkt BYTES\n");
36}
37
38static int qfq_parse_opt(struct qdisc_util *qu, int argc, char **argv,
39			 struct nlmsghdr *n)
40{
41	if (argc > 0) {
42		if (matches(*argv, "help") != 0)
43			fprintf(stderr, "What is \"%s\"?\n", *argv);
44		explain();
45		return -1;
46	}
47
48	return 0;
49}
50
51static int qfq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
52			       struct nlmsghdr *n)
53{
54	struct rtattr *tail;
55	__u32 tmp;
56
57	tail = NLMSG_TAIL(n);
58	addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
59
60	while (argc > 0) {
61		if (matches(*argv, "weight") == 0) {
62			NEXT_ARG();
63			if (get_u32(&tmp, *argv, 10)) {
64				explain1("weight"); return -1;
65			}
66			addattr32(n, 4096, TCA_QFQ_WEIGHT, tmp);
67		} else if (matches(*argv, "maxpkt") == 0) {
68			NEXT_ARG();
69			if (get_u32(&tmp, *argv, 10)) {
70				explain1("maxpkt"); return -1;
71			}
72			addattr32(n, 4096, TCA_QFQ_LMAX, tmp);
73		} else if (strcmp(*argv, "help") == 0) {
74			explain_class();
75			return -1;
76		} else {
77			fprintf(stderr, "What is \"%s\"?\n", *argv);
78			explain_class();
79			return -1;
80		}
81		argc--; argv++;
82	}
83
84	tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail;
85
86	return 0;
87}
88
89static int qfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
90{
91	struct rtattr *tb[TCA_QFQ_MAX + 1];
92
93	if (opt == NULL)
94		return 0;
95
96	parse_rtattr_nested(tb, TCA_QFQ_MAX, opt);
97
98	if (tb[TCA_QFQ_WEIGHT]) {
99		fprintf(f, "weight %u ",
100			rta_getattr_u32(tb[TCA_QFQ_WEIGHT]));
101	}
102
103	if (tb[TCA_QFQ_LMAX]) {
104		fprintf(f, "maxpkt %u ",
105			rta_getattr_u32(tb[TCA_QFQ_LMAX]));
106	}
107
108	return 0;
109}
110
111struct qdisc_util qfq_qdisc_util = {
112	.id		= "qfq",
113	.parse_qopt	= qfq_parse_opt,
114	.print_qopt	= qfq_print_opt,
115	.parse_copt	= qfq_parse_class_opt,
116	.print_copt	= qfq_print_opt,
117};
118