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#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <getopt.h>
#include <xtables.h>
#include <linux/netfilter/xt_rateest.h>
static void rateest_help(void)
{
printf(
"rateest match options:\n"
" --rateest1 name Rate estimator name\n"
" --rateest2 name Rate estimator name\n"
" --rateest-delta Compare difference(s) to given rate(s)\n"
" --rateest-bps1 [bps] Compare bps\n"
" --rateest-pps1 [pps] Compare pps\n"
" --rateest-bps2 [bps] Compare bps\n"
" --rateest-pps2 [pps] Compare pps\n"
" [!] --rateest-lt Match if rate is less than given rate/estimator\n"
" [!] --rateest-gt Match if rate is greater than given rate/estimator\n"
" [!] --rateest-eq Match if rate is equal to given rate/estimator\n");
}
enum rateest_options {
OPT_RATEEST1,
OPT_RATEEST2,
OPT_RATEEST_BPS1,
OPT_RATEEST_PPS1,
OPT_RATEEST_BPS2,
OPT_RATEEST_PPS2,
OPT_RATEEST_DELTA,
OPT_RATEEST_LT,
OPT_RATEEST_GT,
OPT_RATEEST_EQ,
};
static const struct option rateest_opts[] = {
{.name = "rateest1", .has_arg = true, .val = OPT_RATEEST1},
{.name = "rateest", .has_arg = true, .val = OPT_RATEEST1}, /* alias for absolute mode */
{.name = "rateest2", .has_arg = true, .val = OPT_RATEEST2},
{.name = "rateest-bps1", .has_arg = false, .val = OPT_RATEEST_BPS1},
{.name = "rateest-pps1", .has_arg = false, .val = OPT_RATEEST_PPS1},
{.name = "rateest-bps2", .has_arg = false, .val = OPT_RATEEST_BPS2},
{.name = "rateest-pps2", .has_arg = false, .val = OPT_RATEEST_PPS2},
{.name = "rateest-bps", .has_arg = false, .val = OPT_RATEEST_BPS2}, /* alias for absolute mode */
{.name = "rateest-pps", .has_arg = false, .val = OPT_RATEEST_PPS2}, /* alias for absolute mode */
{.name = "rateest-delta", .has_arg = false, .val = OPT_RATEEST_DELTA},
{.name = "rateest-lt", .has_arg = false, .val = OPT_RATEEST_LT},
{.name = "rateest-gt", .has_arg = false, .val = OPT_RATEEST_GT},
{.name = "rateest-eq", .has_arg = false, .val = OPT_RATEEST_EQ},
XT_GETOPT_TABLEEND,
};
/* Copied from iproute. See http://physics.nist.gov/cuu/Units/binary.html */
static const struct rate_suffix {
const char *name;
double scale;
} suffixes[] = {
{ "bit", 1. },
{ "Kibit", 1024. },
{ "kbit", 1000. },
{ "Mibit", 1024.*1024. },
{ "mbit", 1000000. },
{ "Gibit", 1024.*1024.*1024. },
{ "gbit", 1000000000. },
{ "Tibit", 1024.*1024.*1024.*1024. },
{ "tbit", 1000000000000. },
{ "Bps", 8. },
{ "KiBps", 8.*1024. },
{ "KBps", 8000. },
{ "MiBps", 8.*1024*1024. },
{ "MBps", 8000000. },
{ "GiBps", 8.*1024.*1024.*1024. },
{ "GBps", 8000000000. },
{ "TiBps", 8.*1024.*1024.*1024.*1024. },
{ "TBps", 8000000000000. },
{NULL},
};
static int
rateest_get_rate(uint32_t *rate, const char *str)
{
char *p;
double bps = strtod(str, &p);
const struct rate_suffix *s;
if (p == str)
return -1;
if (*p == '\0') {
*rate = bps / 8.; /* assume bytes/sec */
return 0;
}
for (s = suffixes; s->name; ++s) {
if (strcasecmp(s->name, p) == 0) {
*rate = (bps * s->scale) / 8.;
return 0;
}
}
return -1;
}
static int
rateest_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_match **match)
{
struct xt_rateest_match_info *info = (void *)(*match)->data;
unsigned int val;
switch (c) {
case OPT_RATEEST1:
if (invert)
xtables_error(PARAMETER_PROBLEM,
"rateest: rateest can't be inverted");
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify --rateest1 twice");
*flags |= 1 << c;
strncpy(info->name1, optarg, sizeof(info->name1) - 1);
break;
case OPT_RATEEST2:
if (invert)
xtables_error(PARAMETER_PROBLEM,
"rateest: rateest can't be inverted");
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify --rateest2 twice");
*flags |= 1 << c;
strncpy(info->name2, optarg, sizeof(info->name2) - 1);
info->flags |= XT_RATEEST_MATCH_REL;
break;
case OPT_RATEEST_BPS1:
if (invert)
xtables_error(PARAMETER_PROBLEM,
"rateest: rateest-bps can't be inverted");
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify --rateest-bps1 twice");
*flags |= 1 << c;
info->flags |= XT_RATEEST_MATCH_BPS;
/* The rate is optional and only required in absolute mode */
if (!argv[optind] || *argv[optind] == '-' || *argv[optind] == '!')
break;
if (rateest_get_rate(&info->bps1, argv[optind]) < 0)
xtables_error(PARAMETER_PROBLEM,
"rateest: could not parse rate `%s'",
argv[optind]);
optind++;
break;
case OPT_RATEEST_PPS1:
if (invert)
xtables_error(PARAMETER_PROBLEM,
"rateest: rateest-pps can't be inverted");
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify --rateest-pps1 twice");
*flags |= 1 << c;
info->flags |= XT_RATEEST_MATCH_PPS;
/* The rate is optional and only required in absolute mode */
if (!argv[optind] || *argv[optind] == '-' || *argv[optind] == '!')
break;
if (!xtables_strtoui(argv[optind], NULL, &val, 0, UINT32_MAX))
xtables_error(PARAMETER_PROBLEM,
"rateest: could not parse pps `%s'",
argv[optind]);
info->pps1 = val;
optind++;
break;
case OPT_RATEEST_BPS2:
if (invert)
xtables_error(PARAMETER_PROBLEM,
"rateest: rateest-bps can't be inverted");
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify --rateest-bps2 twice");
*flags |= 1 << c;
info->flags |= XT_RATEEST_MATCH_BPS;
/* The rate is optional and only required in absolute mode */
if (!argv[optind] || *argv[optind] == '-' || *argv[optind] == '!')
break;
if (rateest_get_rate(&info->bps2, argv[optind]) < 0)
xtables_error(PARAMETER_PROBLEM,
"rateest: could not parse rate `%s'",
argv[optind]);
optind++;
break;
case OPT_RATEEST_PPS2:
if (invert)
xtables_error(PARAMETER_PROBLEM,
"rateest: rateest-pps can't be inverted");
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify --rateest-pps2 twice");
*flags |= 1 << c;
info->flags |= XT_RATEEST_MATCH_PPS;
/* The rate is optional and only required in absolute mode */
if (!argv[optind] || *argv[optind] == '-' || *argv[optind] == '!')
break;
if (!xtables_strtoui(argv[optind], NULL, &val, 0, UINT32_MAX))
xtables_error(PARAMETER_PROBLEM,
"rateest: could not parse pps `%s'",
argv[optind]);
info->pps2 = val;
optind++;
break;
case OPT_RATEEST_DELTA:
if (invert)
xtables_error(PARAMETER_PROBLEM,
"rateest: rateest-delta can't be inverted");
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify --rateest-delta twice");
*flags |= 1 << c;
info->flags |= XT_RATEEST_MATCH_DELTA;
break;
case OPT_RATEEST_EQ:
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify lt/gt/eq twice");
*flags |= 1 << c;
info->mode = XT_RATEEST_MATCH_EQ;
if (invert)
info->flags |= XT_RATEEST_MATCH_INVERT;
break;
case OPT_RATEEST_LT:
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify lt/gt/eq twice");
*flags |= 1 << c;
info->mode = XT_RATEEST_MATCH_LT;
if (invert)
info->flags |= XT_RATEEST_MATCH_INVERT;
break;
case OPT_RATEEST_GT:
if (*flags & (1 << c))
xtables_error(PARAMETER_PROBLEM,
"rateest: can't specify lt/gt/eq twice");
*flags |= 1 << c;
info->mode = XT_RATEEST_MATCH_GT;
if (invert)
info->flags |= XT_RATEEST_MATCH_INVERT;
break;
}
return 1;
}
static void rateest_final_check(struct xt_fcheck_call *cb)
{
struct xt_rateest_match_info *info = cb->data;
if (info == NULL)
xtables_error(PARAMETER_PROBLEM, "rateest match: "
"you need to specify some flags");
if (!(info->flags & XT_RATEEST_MATCH_REL))
info->flags |= XT_RATEEST_MATCH_ABS;
}
static void
rateest_print_rate(uint32_t rate, int numeric)
{
double tmp = (double)rate*8;
if (numeric)
printf(" %u", rate);
else if (tmp >= 1000.0*1000000.0)
printf(" %.0fMbit", tmp/1000000.0);
else if (tmp >= 1000.0 * 1000.0)
printf(" %.0fKbit", tmp/1000.0);
else
printf(" %.0fbit", tmp);
}
static void
rateest_print_mode(const struct xt_rateest_match_info *info,
const char *prefix)
{
if (info->flags & XT_RATEEST_MATCH_INVERT)
printf(" !");
switch (info->mode) {
case XT_RATEEST_MATCH_EQ:
printf(" %seq", prefix);
break;
case XT_RATEEST_MATCH_LT:
printf(" %slt", prefix);
break;
case XT_RATEEST_MATCH_GT:
printf(" %sgt", prefix);
break;
default:
exit(1);
}
}
static void
rateest_print(const void *ip, const struct xt_entry_match *match, int numeric)
{
const struct xt_rateest_match_info *info = (const void *)match->data;
printf(" rateest match ");
printf("%s", info->name1);
if (info->flags & XT_RATEEST_MATCH_DELTA)
printf(" delta");
if (info->flags & XT_RATEEST_MATCH_BPS) {
printf(" bps");
if (info->flags & XT_RATEEST_MATCH_DELTA)
rateest_print_rate(info->bps1, numeric);
if (info->flags & XT_RATEEST_MATCH_ABS) {
rateest_print_mode(info, "");
rateest_print_rate(info->bps2, numeric);
}
}
if (info->flags & XT_RATEEST_MATCH_PPS) {
printf(" pps");
if (info->flags & XT_RATEEST_MATCH_DELTA)
printf(" %u", info->pps1);
if (info->flags & XT_RATEEST_MATCH_ABS) {
rateest_print_mode(info, "");
printf(" %u", info->pps2);
}
}
if (info->flags & XT_RATEEST_MATCH_REL) {
rateest_print_mode(info, "");
printf(" %s", info->name2);
if (info->flags & XT_RATEEST_MATCH_DELTA)
printf(" delta");
if (info->flags & XT_RATEEST_MATCH_BPS) {
printf(" bps");
if (info->flags & XT_RATEEST_MATCH_DELTA)
rateest_print_rate(info->bps2, numeric);
}
if (info->flags & XT_RATEEST_MATCH_PPS) {
printf(" pps");
if (info->flags & XT_RATEEST_MATCH_DELTA)
printf(" %u", info->pps2);
}
}
}
static void
rateest_save(const void *ip, const struct xt_entry_match *match)
{
const struct xt_rateest_match_info *info = (const void *)match->data;
if (info->flags & XT_RATEEST_MATCH_REL) {
printf(" --rateest1 %s", info->name1);
if (info->flags & XT_RATEEST_MATCH_BPS)
printf(" --rateest-bps");
if (info->flags & XT_RATEEST_MATCH_PPS)
printf(" --rateest-pps");
rateest_print_mode(info, " --rateest-");
printf(" --rateest2 %s", info->name2);
} else {
printf(" --rateest %s", info->name1);
if (info->flags & XT_RATEEST_MATCH_BPS) {
printf(" --rateest-bps1");
rateest_print_rate(info->bps1, 0);
printf(" --rateest-bps2");
rateest_print_rate(info->bps2, 0);
rateest_print_mode(info, "--rateest-");
}
if (info->flags & XT_RATEEST_MATCH_PPS) {
printf(" --rateest-pps");
rateest_print_mode(info, "--rateest-");
printf(" %u", info->pps2);
}
}
}
static struct xtables_match rateest_mt_reg = {
.family = NFPROTO_UNSPEC,
.name = "rateest",
.version = XTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_rateest_match_info)),
.userspacesize = XT_ALIGN(offsetof(struct xt_rateest_match_info, est1)),
.help = rateest_help,
.parse = rateest_parse,
.x6_fcheck = rateest_final_check,
.print = rateest_print,
.save = rateest_save,
.extra_opts = rateest_opts,
};
void _init(void)
{
xtables_register_match(&rateest_mt_reg);
}
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