/usr/src/xtables-addons-1.40/iptable_rawpost.c is in xtables-addons-dkms 1.40-1.
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 | /*
* rawpost table for ip_tables
* written by Jan Engelhardt <jengelh [at] medozas de>, 2008 - 2009
* placed in the Public Domain
*/
#include <linux/module.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/version.h>
#include <net/ip.h>
#include "compat_xtables.h"
#include "compat_rawpost.h"
enum {
RAWPOST_VALID_HOOKS = 1 << NF_INET_POST_ROUTING,
};
static struct {
struct ipt_replace repl;
struct ipt_standard entries[1];
struct ipt_error term;
} rawpost4_initial __initdata = {
.repl = {
.name = "rawpost",
.valid_hooks = RAWPOST_VALID_HOOKS,
.num_entries = 2,
.size = sizeof(struct ipt_standard) +
sizeof(struct ipt_error),
.hook_entry = {
[NF_INET_POST_ROUTING] = 0,
},
.underflow = {
[NF_INET_POST_ROUTING] = 0,
},
},
.entries = {
IPT_STANDARD_INIT(NF_ACCEPT), /* POST_ROUTING */
},
.term = IPT_ERROR_INIT, /* ERROR */
};
static struct xt_table *rawpost4_ptable;
static struct xt_table rawpost4_itable = {
.name = "rawpost",
.af = NFPROTO_IPV4,
.valid_hooks = RAWPOST_VALID_HOOKS,
.me = THIS_MODULE,
};
static unsigned int rawpost4_hook_fn(unsigned int hook, sk_buff_t *skb,
const struct net_device *in, const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
return ipt_do_table(skb, hook, in, out, rawpost4_ptable);
#else
return ipt_do_table(skb, hook, in, out, rawpost4_ptable, NULL);
#endif
}
static struct nf_hook_ops rawpost4_hook_ops __read_mostly = {
.hook = rawpost4_hook_fn,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_POST_ROUTING,
.priority = NF_IP_PRI_LAST,
.owner = THIS_MODULE,
};
static int __init rawpost4_table_init(void)
{
int ret;
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 29)
rwlock_init(&rawpost4_itable.lock);
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
rawpost4_ptable = ipt_register_table(&init_net, &rawpost4_itable,
&rawpost4_initial.repl);
if (IS_ERR(rawpost4_ptable))
return PTR_ERR(rawpost4_ptable);
#else
ret = ipt_register_table(&rawpost4_itable, &rawpost4_initial.repl);
if (ret < 0)
return ret;
rawpost4_ptable = &rawpost4_itable;
#endif
ret = nf_register_hook(&rawpost4_hook_ops);
if (ret < 0)
goto out;
return ret;
out:
ipt_unregister_table(rawpost4_ptable);
return ret;
}
static void __exit rawpost4_table_exit(void)
{
nf_unregister_hook(&rawpost4_hook_ops);
ipt_unregister_table(rawpost4_ptable);
}
module_init(rawpost4_table_init);
module_exit(rawpost4_table_exit);
MODULE_DESCRIPTION("Xtables: rawpost table for use with RAWNAT");
MODULE_AUTHOR("Jan Engelhardt <jengelh@medozas.de>");
MODULE_LICENSE("GPL");
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