+++ /dev/null
-/* Shared library add-on to ip6tables to add packet length matching support. */
-
-#include <stdio.h>
-#include <netdb.h>
-#include <string.h>
-#include <stdlib.h>
-#include <getopt.h>
-
-#include <ip6tables.h>
-#include <linux/netfilter_ipv6/ip6t_length.h>
-
-/* Function which prints out usage message. */
-static void
-help(void)
-{
- printf(
-"length v%s options:\n"
-"[!] --length length[:length] Match packet length against value or range\n"
-" of values (inclusive)\n",
-IPTABLES_VERSION);
-
-}
-
-static struct option opts[] = {
- { "length", 1, 0, '1' },
- {0}
-};
-
-static u_int16_t
-parse_length(const char *s)
-{
-
- unsigned int len;
-
- if (string_to_number(s, 0, 0xFFFF, &len) == -1)
- exit_error(PARAMETER_PROBLEM, "length invalid: `%s'\n", s);
- else
- return (u_int16_t )len;
-}
-
-/* If a single value is provided, min and max are both set to the value */
-static void
-parse_lengths(const char *s, struct ip6t_length_info *info)
-{
- char *buffer;
- char *cp;
-
- buffer = strdup(s);
- if ((cp = strchr(buffer, ':')) == NULL)
- info->min = info->max = parse_length(buffer);
- else {
- *cp = '\0';
- cp++;
-
- info->min = buffer[0] ? parse_length(buffer) : 0;
- info->max = cp[0] ? parse_length(cp) : 0xFFFF;
- }
- free(buffer);
-
- if (info->min > info->max)
- exit_error(PARAMETER_PROBLEM,
- "length min. range value `%u' greater than max. "
- "range value `%u'", info->min, info->max);
-
-}
-
-/* Function which parses command options; returns true if it
- ate an option */
-static int
-parse(int c, char **argv, int invert, unsigned int *flags,
- const void *entry,
- unsigned int *nfcache,
- struct xt_entry_match **match)
-{
- struct ip6t_length_info *info = (struct ip6t_length_info *)(*match)->data;
-
- switch (c) {
- case '1':
- if (*flags)
- exit_error(PARAMETER_PROBLEM,
- "length: `--length' may only be "
- "specified once");
- check_inverse(optarg, &invert, &optind, 0);
- parse_lengths(argv[optind-1], info);
- if (invert)
- info->invert = 1;
- *flags = 1;
- break;
-
- default:
- return 0;
- }
- return 1;
-}
-
-/* Final check; must have specified --length. */
-static void
-final_check(unsigned int flags)
-{
- if (!flags)
- exit_error(PARAMETER_PROBLEM,
- "length: You must specify `--length'");
-}
-
-/* Common match printing code. */
-static void
-print_length(struct ip6t_length_info *info)
-{
- if (info->invert)
- printf("! ");
-
- if (info->max == info->min)
- printf("%u ", info->min);
- else
- printf("%u:%u ", info->min, info->max);
-}
-
-/* Prints out the matchinfo. */
-static void
-print(const void *ip,
- const struct xt_entry_match *match,
- int numeric)
-{
- printf("length ");
- print_length((struct ip6t_length_info *)match->data);
-}
-
-/* Saves the union ip6t_matchinfo in parsable form to stdout. */
-static void
-save(const void *ip, const struct xt_entry_match *match)
-{
- printf("--length ");
- print_length((struct ip6t_length_info *)match->data);
-}
-
-struct ip6tables_match length = {
- .name = "length",
- .version = IPTABLES_VERSION,
- .size = IP6T_ALIGN(sizeof(struct ip6t_length_info)),
- .userspacesize = IP6T_ALIGN(sizeof(struct ip6t_length_info)),
- .help = &help,
- .parse = &parse,
- .final_check = &final_check,
- .print = &print,
- .save = &save,
- .extra_opts = opts,
-};
-
-void _init(void)
-{
- register_match6(&length);
-}
#include <stdlib.h>
#include <getopt.h>
-#include <iptables.h>
-#include <linux/netfilter_ipv4/ipt_length.h>
+#include <xtables.h>
+#include <linux/netfilter/xt_length.h>
/* Function which prints out usage message. */
static void
/* If a single value is provided, min and max are both set to the value */
static void
-parse_lengths(const char *s, struct ipt_length_info *info)
+parse_lengths(const char *s, struct xt_length_info *info)
{
char *buffer;
char *cp;
unsigned int *nfcache,
struct xt_entry_match **match)
{
- struct ipt_length_info *info = (struct ipt_length_info *)(*match)->data;
+ struct xt_length_info *info = (struct xt_length_info *)(*match)->data;
switch (c) {
case '1':
/* Common match printing code. */
static void
-print_length(struct ipt_length_info *info)
+print_length(struct xt_length_info *info)
{
if (info->invert)
printf("! ");
int numeric)
{
printf("length ");
- print_length((struct ipt_length_info *)match->data);
+ print_length((struct xt_length_info *)match->data);
}
/* Saves the union ipt_matchinfo in parsable form to stdout. */
save(const void *ip, const struct xt_entry_match *match)
{
printf("--length ");
- print_length((struct ipt_length_info *)match->data);
+ print_length((struct xt_length_info *)match->data);
}
-static struct iptables_match length = {
+static struct xtables_match length = {
.next = NULL,
+ .family = AF_INET,
.name = "length",
.version = IPTABLES_VERSION,
- .size = IPT_ALIGN(sizeof(struct ipt_length_info)),
- .userspacesize = IPT_ALIGN(sizeof(struct ipt_length_info)),
+ .size = XT_ALIGN(sizeof(struct xt_length_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_length_info)),
+ .help = &help,
+ .parse = &parse,
+ .final_check = &final_check,
+ .print = &print,
+ .save = &save,
+ .extra_opts = opts
+};
+
+static struct xtables_match length6 = {
+ .next = NULL,
+ .family = AF_INET6,
+ .name = "length",
+ .version = IPTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_length_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_length_info)),
.help = &help,
.parse = &parse,
.final_check = &final_check,
void _init(void)
{
- register_match(&length);
+ xtables_register_match(&length);
+ xtables_register_match(&length6);
}
projects / thirdparty / iptables.git / commitdiff
