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	while (argc > 0) {
42		if (matches(*argv, "help") == 0) {
43			explain();
44			return -1;
45		} else {
46			fprintf(stderr, "What is \"%s\"?\n", *argv);
47			explain();
48			return -1;
49		}
50		argc--; argv++;
51	}
52
53	return 0;
54}
55
56static int qfq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
57			       struct nlmsghdr *n)
58{
59	struct rtattr *tail;
60	__u32 tmp;
61
62	tail = NLMSG_TAIL(n);
63	addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);
64
65	while (argc > 0) {
66		if (matches(*argv, "weight") == 0) {
67			NEXT_ARG();
68			if (get_u32(&tmp, *argv, 10)) {
69				explain1("weight"); return -1;
70			}
71			addattr32(n, 4096, TCA_QFQ_WEIGHT, tmp);
72		} else if (matches(*argv, "maxpkt") == 0) {
73			NEXT_ARG();
74			if (get_u32(&tmp, *argv, 10)) {
75				explain1("maxpkt"); return -1;
76			}
77			addattr32(n, 4096, TCA_QFQ_LMAX, tmp);
78		} else if (strcmp(*argv, "help") == 0) {
79			explain_class();
80			return -1;
81		} else {
82			fprintf(stderr, "What is \"%s\"?\n", *argv);
83			explain_class();
84			return -1;
85		}
86		argc--; argv++;
87	}
88
89	tail->rta_len = (void *)NLMSG_TAIL(n) - (void *)tail;
90
91	return 0;
92}
93
94static int qfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
95{
96	struct rtattr *tb[TCA_QFQ_MAX + 1];
97
98	if (opt == NULL)
99		return 0;
100
101	parse_rtattr_nested(tb, TCA_QFQ_MAX, opt);
102
103	if (tb[TCA_QFQ_WEIGHT]) {
104		fprintf(f, "weight %u ",
105			rta_getattr_u32(tb[TCA_QFQ_WEIGHT]));
106	}
107
108	if (tb[TCA_QFQ_LMAX]) {
109		fprintf(f, "maxpkt %u ",
110			rta_getattr_u32(tb[TCA_QFQ_LMAX]));
111	}
112
113	return 0;
114}
115
116struct qdisc_util qfq_qdisc_util = {
117	.id		= "qfq",
118	.parse_qopt	= qfq_parse_opt,
119	.print_qopt	= qfq_print_opt,
120	.parse_copt	= qfq_parse_class_opt,
121	.print_copt	= qfq_print_opt,
122};
123