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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* q_drr.c DRR.
*
* Authors: Patrick McHardy <kaber@trash.net>
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include "utils.h"
#include "tc_util.h"
static void explain(void)
{
fprintf(stderr, "Usage: ... drr\n");
}
static void explain2(void)
{
fprintf(stderr, "Usage: ... drr quantum SIZE\n");
}
static int drr_parse_opt(struct qdisc_util *qu, int argc, char **argv,
struct nlmsghdr *n, const char *dev)
{
while (argc) {
if (strcmp(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain();
return -1;
}
}
return 0;
}
static int drr_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
struct nlmsghdr *n, const char *dev)
{
struct rtattr *tail;
__u32 tmp;
tail = addattr_nest(n, 1024, TCA_OPTIONS);
while (argc > 0) {
if (strcmp(*argv, "quantum") == 0) {
NEXT_ARG();
if (get_size(&tmp, *argv)) {
fprintf(stderr, "Illegal \"quantum\"\n");
return -1;
}
addattr_l(n, 1024, TCA_DRR_QUANTUM, &tmp, sizeof(tmp));
} else if (strcmp(*argv, "help") == 0) {
explain2();
return -1;
} else {
fprintf(stderr, "What is \"%s\"?\n", *argv);
explain2();
return -1;
}
argc--; argv++;
}
addattr_nest_end(n, tail);
return 0;
}
static int drr_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct rtattr *tb[TCA_DRR_MAX + 1];
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_DRR_MAX, opt);
if (tb[TCA_DRR_QUANTUM])
print_size(PRINT_FP, NULL, "quantum %s ",
rta_getattr_u32(tb[TCA_DRR_QUANTUM]));
return 0;
}
static int drr_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
{
struct tc_drr_stats *x;
if (xstats == NULL)
return 0;
if (RTA_PAYLOAD(xstats) < sizeof(*x))
return -1;
x = RTA_DATA(xstats);
print_size(PRINT_FP, NULL, " deficit %s ", x->deficit);
return 0;
}
struct qdisc_util drr_qdisc_util = {
.id = "drr",
.parse_qopt = drr_parse_opt,
.print_qopt = drr_print_opt,
.print_xstats = drr_print_xstats,
.parse_copt = drr_parse_class_opt,
.print_copt = drr_print_opt,
};
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