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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* tc_stab.c "tc qdisc ... stab *".
*
* Authors: Jussi Kivilinna, <jussi.kivilinna@mbnet.fi>
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <math.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <malloc.h>
#include "utils.h"
#include "tc_util.h"
#include "tc_core.h"
#include "tc_common.h"
static void stab_help(void)
{
fprintf(stderr,
"Usage: ... stab [ mtu BYTES ] [ tsize SLOTS ] [ mpu BYTES ]\n"
" [ overhead BYTES ] [ linklayer TYPE ] ...\n"
" mtu : max packet size we create rate map for {2047}\n"
" tsize : how many slots should size table have {512}\n"
" mpu : minimum packet size used in rate computations\n"
" overhead : per-packet size overhead used in rate computations\n"
" linklayer : adapting to a linklayer e.g. atm\n"
"Example: ... stab overhead 20 linklayer atm\n");
}
int check_size_table_opts(struct tc_sizespec *s)
{
return s->linklayer >= LINKLAYER_ETHERNET || s->mpu != 0 ||
s->overhead != 0;
}
int parse_size_table(int *argcp, char ***argvp, struct tc_sizespec *sp)
{
char **argv = *argvp;
int argc = *argcp;
struct tc_sizespec s = {};
NEXT_ARG();
if (matches(*argv, "help") == 0) {
stab_help();
return -1;
}
while (argc > 0) {
if (matches(*argv, "mtu") == 0) {
NEXT_ARG();
if (s.mtu)
duparg("mtu", *argv);
if (get_u32(&s.mtu, *argv, 10))
invarg("mtu", "invalid mtu");
} else if (matches(*argv, "mpu") == 0) {
NEXT_ARG();
if (s.mpu)
duparg("mpu", *argv);
if (get_u32(&s.mpu, *argv, 10))
invarg("mpu", "invalid mpu");
} else if (matches(*argv, "overhead") == 0) {
NEXT_ARG();
if (s.overhead)
duparg("overhead", *argv);
if (get_integer(&s.overhead, *argv, 10))
invarg("overhead", "invalid overhead");
} else if (matches(*argv, "tsize") == 0) {
NEXT_ARG();
if (s.tsize)
duparg("tsize", *argv);
if (get_u32(&s.tsize, *argv, 10))
invarg("tsize", "invalid table size");
} else if (matches(*argv, "linklayer") == 0) {
NEXT_ARG();
if (s.linklayer != LINKLAYER_UNSPEC)
duparg("linklayer", *argv);
if (get_linklayer(&s.linklayer, *argv))
invarg("linklayer", "invalid linklayer");
} else
break;
argc--; argv++;
}
if (!check_size_table_opts(&s))
return -1;
*sp = s;
*argvp = argv;
*argcp = argc;
return 0;
}
void print_size_table(struct rtattr *rta)
{
struct rtattr *tb[TCA_STAB_MAX + 1];
SPRINT_BUF(b1);
parse_rtattr_nested(tb, TCA_STAB_MAX, rta);
if (tb[TCA_STAB_BASE]) {
struct tc_sizespec s = {0};
memcpy(&s, RTA_DATA(tb[TCA_STAB_BASE]),
MIN(RTA_PAYLOAD(tb[TCA_STAB_BASE]), sizeof(s)));
open_json_object("stab");
print_string(PRINT_FP, NULL, " ", NULL);
if (s.linklayer)
print_string(PRINT_ANY, "linklayer",
"linklayer %s ",
sprint_linklayer(s.linklayer, b1));
if (s.overhead)
print_int(PRINT_ANY, "overhead",
"overhead %d ", s.overhead);
if (s.mpu)
print_uint(PRINT_ANY, "mpu",
"mpu %u ", s.mpu);
if (s.mtu)
print_uint(PRINT_ANY, "mtu",
"mtu %u ", s.mtu);
if (s.tsize)
print_uint(PRINT_ANY, "tsize",
"tsize %u ", s.tsize);
close_json_object();
}
}
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