libxt_hashlimit: Prepare libxt_hashlimit.c for revision 2
I am planning to add a revision 2 for the hashlimit xtables module to
support higher packets per second rates. This patch renames all the
functions and variables related to revision 1 by adding _v1 at the end of
the names.
Signed-off-by: Vishwanath Pai <vpai@xxxxxxxxxx>
diff --git a/extensions/libxt_hashlimit.c b/extensions/libxt_hashlimit.c
index c5b8d77..ad7fb93 100644
--- a/extensions/libxt_hashlimit.c
+++ b/extensions/libxt_hashlimit.c
@@ -23,7 +23,7 @@
#include <linux/netfilter/xt_hashlimit.h>
#define XT_HASHLIMIT_BURST 5
-#define XT_HASHLIMIT_BURST_MAX 10000
+#define XT_HASHLIMIT_BURST_MAX_v1 10000
#define XT_HASHLIMIT_BYTE_EXPIRE 15
#define XT_HASHLIMIT_BYTE_EXPIRE_BURST 60
@@ -98,7 +98,7 @@ static const struct xt_option_entry hashlimit_opts[] = {
{.name = "hashlimit", .id = O_UPTO, .excl = F_ABOVE,
.type = XTTYPE_STRING},
{.name = "hashlimit-burst", .id = O_BURST, .type = XTTYPE_UINT32,
- .min = 1, .max = XT_HASHLIMIT_BURST_MAX, .flags = XTOPT_PUT,
+ .min = 1, .max = XT_HASHLIMIT_BURST_MAX_v1, .flags = XTOPT_PUT,
XTOPT_POINTER(s, cfg.burst)},
{.name = "hashlimit-htable-size", .id = O_HTABLE_SIZE,
.type = XTTYPE_UINT32, .flags = XTOPT_PUT,
@@ -121,7 +121,7 @@ static const struct xt_option_entry hashlimit_opts[] = {
#undef s
#define s struct xt_hashlimit_mtinfo1
-static const struct xt_option_entry hashlimit_mt_opts[] = {
+static const struct xt_option_entry hashlimit_mt_opts_v1[] = {
{.name = "hashlimit-upto", .id = O_UPTO, .excl = F_ABOVE,
.type = XTTYPE_STRING, .flags = XTOPT_INVERT},
{.name = "hashlimit-above", .id = O_ABOVE, .excl = F_UPTO,
@@ -174,10 +174,10 @@ static uint32_t get_factor(int chr)
return 1;
}
-static void burst_error(void)
+static void burst_error_v1(void)
{
xtables_error(PARAMETER_PROBLEM, "bad value for option "
- "\"--hashlimit-burst\", or out of range (1-%u).", XT_HASHLIMIT_BURST_MAX);
+ "\"--hashlimit-burst\", or out of range (1-%u).", XT_HASHLIMIT_BURST_MAX_v1);
}
static uint32_t parse_burst(const char *burst, struct xt_hashlimit_mtinfo1 *info)
@@ -186,8 +186,8 @@ static uint32_t parse_burst(const char *burst, struct xt_hashlimit_mtinfo1 *info
char *end;
if (!xtables_strtoul(burst, &end, &v, 1, UINT32_MAX) ||
- (*end == 0 && v > XT_HASHLIMIT_BURST_MAX))
- burst_error();
+ (*end == 0 && v > XT_HASHLIMIT_BURST_MAX_v1))
+ burst_error_v1();
v *= get_factor(*end);
if (v > UINT32_MAX)
@@ -253,7 +253,7 @@ int parse_rate(const char *rate, uint32_t *val, struct hashlimit_mt_udata *ud)
if (!r)
return 0;
- *val = XT_HASHLIMIT_SCALE * ud->mult / r;
+ *val = XT_HASHLIMIT_SCALE_v1 * ud->mult / r;
if (*val == 0)
/*
* The rate maps to infinity. (1/day is the minimum they can
@@ -272,7 +272,7 @@ static void hashlimit_init(struct xt_entry_match *m)
}
-static void hashlimit_mt4_init(struct xt_entry_match *match)
+static void hashlimit_mt4_init_v1(struct xt_entry_match *match)
{
struct xt_hashlimit_mtinfo1 *info = (void *)match->data;
@@ -283,7 +283,7 @@ static void hashlimit_mt4_init(struct xt_entry_match *match)
info->cfg.dstmask = 32;
}
-static void hashlimit_mt6_init(struct xt_entry_match *match)
+static void hashlimit_mt6_init_v1(struct xt_entry_match *match)
{
struct xt_hashlimit_mtinfo1 *info = (void *)match->data;
@@ -342,7 +342,7 @@ static void hashlimit_parse(struct xt_option_call *cb)
}
}
-static void hashlimit_mt_parse(struct xt_option_call *cb)
+static void hashlimit_mt_parse_v1(struct xt_option_call *cb)
{
struct xt_hashlimit_mtinfo1 *info = cb->data;
@@ -395,7 +395,7 @@ static void hashlimit_check(struct xt_fcheck_call *cb)
info->cfg.expire = udata->mult * 1000; /* from s to msec */
}
-static void hashlimit_mt_check(struct xt_fcheck_call *cb)
+static void hashlimit_mt_check_v1(struct xt_fcheck_call *cb)
{
const struct hashlimit_mt_udata *udata = cb->udata;
struct xt_hashlimit_mtinfo1 *info = cb->data;
@@ -421,18 +421,18 @@ static void hashlimit_mt_check(struct xt_fcheck_call *cb)
info->cfg.expire = XT_HASHLIMIT_BYTE_EXPIRE_BURST * 1000;
}
info->cfg.burst = burst;
- } else if (info->cfg.burst > XT_HASHLIMIT_BURST_MAX)
- burst_error();
+ } else if (info->cfg.burst > XT_HASHLIMIT_BURST_MAX_v1)
+ burst_error_v1();
}
-static const struct rates
+static const struct rates_v1
{
const char *name;
uint32_t mult;
-} rates[] = { { "day", XT_HASHLIMIT_SCALE*24*60*60 },
- { "hour", XT_HASHLIMIT_SCALE*60*60 },
- { "min", XT_HASHLIMIT_SCALE*60 },
- { "sec", XT_HASHLIMIT_SCALE } };
+} rates_v1[] = { { "day", XT_HASHLIMIT_SCALE_v1*24*60*60 },
+ { "hour", XT_HASHLIMIT_SCALE_v1*60*60 },
+ { "min", XT_HASHLIMIT_SCALE_v1*60 },
+ { "sec", XT_HASHLIMIT_SCALE_v1 } };
static uint32_t print_rate(uint32_t period)
{
@@ -443,14 +443,14 @@ static uint32_t print_rate(uint32_t period)
return 0;
}
- for (i = 1; i < ARRAY_SIZE(rates); ++i)
- if (period > rates[i].mult
- || rates[i].mult/period < rates[i].mult%period)
+ for (i = 1; i < ARRAY_SIZE(rates_v1); ++i)
+ if (period > rates_v1[i].mult
+ || rates_v1[i].mult/period < rates_v1[i].mult%period)
break;
- printf(" %u/%s", rates[i-1].mult / period, rates[i-1].name);
+ printf(" %u/%s", rates_v1[i-1].mult / period, rates_v1[i-1].name);
/* return in msec */
- return rates[i-1].mult / XT_HASHLIMIT_SCALE * 1000;
+ return rates_v1[i-1].mult / XT_HASHLIMIT_SCALE_v1 * 1000;
}
static const struct {
@@ -574,7 +574,7 @@ hashlimit_mt_print(const struct xt_hashlimit_mtinfo1 *info, unsigned int dmask)
}
static void
-hashlimit_mt4_print(const void *ip, const struct xt_entry_match *match,
+hashlimit_mt4_print_v1(const void *ip, const struct xt_entry_match *match,
int numeric)
{
const struct xt_hashlimit_mtinfo1 *info = (const void *)match->data;
@@ -583,7 +583,7 @@ hashlimit_mt4_print(const void *ip, const struct xt_entry_match *match,
}
static void
-hashlimit_mt6_print(const void *ip, const struct xt_entry_match *match,
+hashlimit_mt6_print_v1(const void *ip, const struct xt_entry_match *match,
int numeric)
{
const struct xt_hashlimit_mtinfo1 *info = (const void *)match->data;
@@ -656,7 +656,7 @@ hashlimit_mt_save(const struct xt_hashlimit_mtinfo1 *info, unsigned int dmask)
}
static void
-hashlimit_mt4_save(const void *ip, const struct xt_entry_match *match)
+hashlimit_mt4_save_v1(const void *ip, const struct xt_entry_match *match)
{
const struct xt_hashlimit_mtinfo1 *info = (const void *)match->data;
@@ -664,7 +664,7 @@ hashlimit_mt4_save(const void *ip, const struct xt_entry_match *match)
}
static void
-hashlimit_mt6_save(const void *ip, const struct xt_entry_match *match)
+hashlimit_mt6_save_v1(const void *ip, const struct xt_entry_match *match)
{
const struct xt_hashlimit_mtinfo1 *info = (const void *)match->data;
@@ -696,12 +696,12 @@ static struct xtables_match hashlimit_mt_reg[] = {
.size = XT_ALIGN(sizeof(struct xt_hashlimit_mtinfo1)),
.userspacesize = offsetof(struct xt_hashlimit_mtinfo1, hinfo),
.help = hashlimit_mt_help,
- .init = hashlimit_mt4_init,
- .x6_parse = hashlimit_mt_parse,
- .x6_fcheck = hashlimit_mt_check,
- .print = hashlimit_mt4_print,
- .save = hashlimit_mt4_save,
- .x6_options = hashlimit_mt_opts,
+ .init = hashlimit_mt4_init_v1,
+ .x6_parse = hashlimit_mt_parse_v1,
+ .x6_fcheck = hashlimit_mt_check_v1,
+ .print = hashlimit_mt4_print_v1,
+ .save = hashlimit_mt4_save_v1,
+ .x6_options = hashlimit_mt_opts_v1,
.udata_size = sizeof(struct hashlimit_mt_udata),
},
{
@@ -712,12 +712,12 @@ static struct xtables_match hashlimit_mt_reg[] = {
.size = XT_ALIGN(sizeof(struct xt_hashlimit_mtinfo1)),
.userspacesize = offsetof(struct xt_hashlimit_mtinfo1, hinfo),
.help = hashlimit_mt_help,
- .init = hashlimit_mt6_init,
- .x6_parse = hashlimit_mt_parse,
- .x6_fcheck = hashlimit_mt_check,
- .print = hashlimit_mt6_print,
- .save = hashlimit_mt6_save,
- .x6_options = hashlimit_mt_opts,
+ .init = hashlimit_mt6_init_v1,
+ .x6_parse = hashlimit_mt_parse_v1,
+ .x6_fcheck = hashlimit_mt_check_v1,
+ .print = hashlimit_mt6_print_v1,
+ .save = hashlimit_mt6_save_v1,
+ .x6_options = hashlimit_mt_opts_v1,
.udata_size = sizeof(struct hashlimit_mt_udata),
},
};
diff --git a/include/linux/netfilter/xt_hashlimit.h b/include/linux/netfilter/xt_hashlimit.h
index 141efbd..0af5477 100644
--- a/include/linux/netfilter/xt_hashlimit.h
+++ b/include/linux/netfilter/xt_hashlimit.h
@@ -4,7 +4,7 @@
#include <linux/types.h>
/* timings are in milliseconds. */
-#define XT_HASHLIMIT_SCALE 10000
+#define XT_HASHLIMIT_SCALE_v1 10000
/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490
seconds, or one packet every 59 hours. */
--
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