/usr/src/xtables-addons-2.3/libxt_RAWSNAT.c is in xtables-addons-dkms 2.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | /*
* "RAWNAT" target extension for iptables
* Copyright © Jan Engelhardt, 2008 - 2009
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License; either
* version 2 of the License, or any later version, as published by the
* Free Software Foundation.
*/
#include <netinet/in.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <xtables.h>
#include <linux/netfilter.h>
#include "xt_RAWNAT.h"
#include "compat_user.h"
enum {
FLAGS_TO = 1 << 0,
};
static const struct option rawsnat_tg_opts[] = {
{.name = "to-source", .has_arg = true, .val = 't'},
{},
};
static void rawsnat_tg_help(void)
{
printf(
"RAWSNAT target options:\n"
" --to-source addr[/mask] Address or network to map to\n"
);
}
static int
rawsnat_tg4_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_target **target)
{
struct xt_rawnat_tginfo *info = (void *)(*target)->data;
struct in_addr *a;
unsigned int mask;
char *end;
switch (c) {
case 't':
info->mask = 32;
end = strchr(optarg, '/');
if (end != NULL) {
*end++ = '\0';
if (!xtables_strtoui(end, NULL, &mask, 0, 32))
xtables_param_act(XTF_BAD_VALUE, "RAWSNAT",
"--to-source", optarg);
info->mask = mask;
}
a = xtables_numeric_to_ipaddr(optarg);
if (a == NULL)
xtables_param_act(XTF_BAD_VALUE, "RAWSNAT",
"--to-source", optarg);
memcpy(&info->addr.in, a, sizeof(*a));
*flags |= FLAGS_TO;
return true;
}
return false;
}
static int
rawsnat_tg6_parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry, struct xt_entry_target **target)
{
struct xt_rawnat_tginfo *info = (void *)(*target)->data;
struct in6_addr *a;
unsigned int mask;
char *end;
switch (c) {
case 't':
info->mask = 128;
end = strchr(optarg, '/');
if (end != NULL) {
*end++ = '\0';
if (!xtables_strtoui(end, NULL, &mask, 0, 128))
xtables_param_act(XTF_BAD_VALUE, "RAWSNAT",
"--to-source", optarg);
info->mask = mask;
}
a = xtables_numeric_to_ip6addr(optarg);
if (a == NULL)
xtables_param_act(XTF_BAD_VALUE, "RAWSNAT",
"--to-source", optarg);
memcpy(&info->addr.in6, a, sizeof(*a));
*flags |= FLAGS_TO;
return true;
}
return false;
}
static void rawsnat_tg_check(unsigned int flags)
{
if (!(flags & FLAGS_TO))
xtables_error(PARAMETER_PROBLEM, "RAWSNAT: "
"\"--to-source\" is required.");
}
static void
rawsnat_tg4_save(const void *entry, const struct xt_entry_target *target)
{
const struct xt_rawnat_tginfo *info = (const void *)target->data;
printf(" --to-source %s/%u ",
xtables_ipaddr_to_numeric(&info->addr.in),
info->mask);
}
static void
rawsnat_tg6_save(const void *entry, const struct xt_entry_target *target)
{
const struct xt_rawnat_tginfo *info = (const void *)target->data;
printf(" --to-source %s/%u ",
xtables_ip6addr_to_numeric(&info->addr.in6),
info->mask);
}
static void
rawsnat_tg4_print(const void *entry, const struct xt_entry_target *target,
int numeric)
{
printf(" -j RAWSNAT");
rawsnat_tg4_save(entry, target);
}
static void
rawsnat_tg6_print(const void *entry, const struct xt_entry_target *target,
int numeric)
{
printf(" -j RAWSNAT");
rawsnat_tg6_save(entry, target);
}
static struct xtables_target rawsnat_tg_reg[] = {
{
.version = XTABLES_VERSION,
.name = "RAWSNAT",
.revision = 0,
.family = NFPROTO_IPV4,
.size = XT_ALIGN(sizeof(struct xt_rawnat_tginfo)),
.userspacesize = XT_ALIGN(sizeof(struct xt_rawnat_tginfo)),
.help = rawsnat_tg_help,
.parse = rawsnat_tg4_parse,
.final_check = rawsnat_tg_check,
.print = rawsnat_tg4_print,
.save = rawsnat_tg4_save,
.extra_opts = rawsnat_tg_opts,
},
{
.version = XTABLES_VERSION,
.name = "RAWSNAT",
.revision = 0,
.family = NFPROTO_IPV6,
.size = XT_ALIGN(sizeof(struct xt_rawnat_tginfo)),
.userspacesize = XT_ALIGN(sizeof(struct xt_rawnat_tginfo)),
.help = rawsnat_tg_help,
.parse = rawsnat_tg6_parse,
.final_check = rawsnat_tg_check,
.print = rawsnat_tg6_print,
.save = rawsnat_tg6_save,
.extra_opts = rawsnat_tg_opts,
},
};
static void _init(void)
{
xtables_register_targets(rawsnat_tg_reg,
sizeof(rawsnat_tg_reg) / sizeof(*rawsnat_tg_reg));
}
|