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/* SPDX-License-Identifier: GPL-2.0 */
/*
* q_dsmark.c Differentiated Services field marking.
*
* Hacked 1998,1999 by Werner Almesberger, EPFL ICA
*
*/
#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: dsmark indices INDICES [ default_index DEFAULT_INDEX ] [ set_tc_index ]\n");
}
static int dsmark_parse_opt(struct qdisc_util *qu, int argc, char **argv,
struct nlmsghdr *n, const char *dev)
{
struct rtattr *tail;
__u16 ind;
char *end;
int dflt, set_tc_index;
ind = set_tc_index = 0;
dflt = -1;
while (argc > 0) {
if (!strcmp(*argv, "indices")) {
NEXT_ARG();
ind = strtoul(*argv, &end, 0);
if (*end) {
explain();
return -1;
}
} else if (!strcmp(*argv,"default_index") || !strcmp(*argv,
"default")) {
NEXT_ARG();
dflt = strtoul(*argv, &end, 0);
if (*end) {
explain();
return -1;
}
} else if (!strcmp(*argv,"set_tc_index")) {
set_tc_index = 1;
} else {
explain();
return -1;
}
argc--;
argv++;
}
if (!ind) {
explain();
return -1;
}
tail = addattr_nest(n, 1024, TCA_OPTIONS);
addattr_l(n, 1024, TCA_DSMARK_INDICES, &ind, sizeof(ind));
if (dflt != -1) {
__u16 tmp = dflt;
addattr_l(n, 1024, TCA_DSMARK_DEFAULT_INDEX, &tmp, sizeof(tmp));
}
if (set_tc_index)
addattr_l(n, 1024, TCA_DSMARK_SET_TC_INDEX, NULL, 0);
addattr_nest_end(n, tail);
return 0;
}
static void explain_class(void)
{
fprintf(stderr, "Usage: ... dsmark [ mask MASK ] [ value VALUE ]\n");
}
static int dsmark_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,
struct nlmsghdr *n, const char *dev)
{
struct rtattr *tail;
__u8 tmp;
char *end;
tail = addattr_nest(n, 1024, TCA_OPTIONS);
while (argc > 0) {
if (!strcmp(*argv, "mask")) {
NEXT_ARG();
tmp = strtoul(*argv, &end, 0);
if (*end) {
explain_class();
return -1;
}
addattr_l(n, 1024, TCA_DSMARK_MASK, &tmp, 1);
} else if (!strcmp(*argv,"value")) {
NEXT_ARG();
tmp = strtoul(*argv, &end, 0);
if (*end) {
explain_class();
return -1;
}
addattr_l(n, 1024, TCA_DSMARK_VALUE, &tmp, 1);
} else {
explain_class();
return -1;
}
argc--;
argv++;
}
addattr_nest_end(n, tail);
return 0;
}
static int dsmark_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct rtattr *tb[TCA_DSMARK_MAX+1];
if (!opt) return 0;
parse_rtattr(tb, TCA_DSMARK_MAX, RTA_DATA(opt), RTA_PAYLOAD(opt));
if (tb[TCA_DSMARK_MASK]) {
if (!RTA_PAYLOAD(tb[TCA_DSMARK_MASK]))
fprintf(stderr, "dsmark: empty mask\n");
else fprintf(f, "mask 0x%02x ",
rta_getattr_u8(tb[TCA_DSMARK_MASK]));
}
if (tb[TCA_DSMARK_VALUE]) {
if (!RTA_PAYLOAD(tb[TCA_DSMARK_VALUE]))
fprintf(stderr, "dsmark: empty value\n");
else fprintf(f, "value 0x%02x ",
rta_getattr_u8(tb[TCA_DSMARK_VALUE]));
}
if (tb[TCA_DSMARK_INDICES]) {
if (RTA_PAYLOAD(tb[TCA_DSMARK_INDICES]) < sizeof(__u16))
fprintf(stderr, "dsmark: indices too short\n");
else fprintf(f, "indices 0x%04x ",
rta_getattr_u16(tb[TCA_DSMARK_INDICES]));
}
if (tb[TCA_DSMARK_DEFAULT_INDEX]) {
if (RTA_PAYLOAD(tb[TCA_DSMARK_DEFAULT_INDEX]) < sizeof(__u16))
fprintf(stderr, "dsmark: default_index too short\n");
else fprintf(f, "default_index 0x%04x ",
rta_getattr_u16(tb[TCA_DSMARK_DEFAULT_INDEX]));
}
if (tb[TCA_DSMARK_SET_TC_INDEX]) fprintf(f, "set_tc_index ");
return 0;
}
struct qdisc_util dsmark_qdisc_util = {
.id = "dsmark",
.parse_qopt = dsmark_parse_opt,
.print_qopt = dsmark_print_opt,
.parse_copt = dsmark_parse_class_opt,
.print_copt = dsmark_print_opt,
};
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