cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

xt_osf.c (1748B)


      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Copyright (c) 2003+ Evgeniy Polyakov <zbr@ioremap.net>
      4 */
      5#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
      6#include <linux/module.h>
      7#include <linux/kernel.h>
      8
      9#include <linux/capability.h>
     10#include <linux/if.h>
     11#include <linux/inetdevice.h>
     12#include <linux/ip.h>
     13#include <linux/list.h>
     14#include <linux/rculist.h>
     15#include <linux/skbuff.h>
     16#include <linux/slab.h>
     17#include <linux/tcp.h>
     18
     19#include <net/ip.h>
     20#include <net/tcp.h>
     21
     22#include <linux/netfilter/nfnetlink.h>
     23#include <linux/netfilter/x_tables.h>
     24#include <net/netfilter/nf_log.h>
     25#include <linux/netfilter/xt_osf.h>
     26
     27static bool
     28xt_osf_match_packet(const struct sk_buff *skb, struct xt_action_param *p)
     29{
     30	return nf_osf_match(skb, xt_family(p), xt_hooknum(p), xt_in(p),
     31			    xt_out(p), p->matchinfo, xt_net(p), nf_osf_fingers);
     32}
     33
     34static struct xt_match xt_osf_match = {
     35	.name 		= "osf",
     36	.revision	= 0,
     37	.family		= NFPROTO_IPV4,
     38	.proto		= IPPROTO_TCP,
     39	.hooks      	= (1 << NF_INET_LOCAL_IN) |
     40				(1 << NF_INET_PRE_ROUTING) |
     41				(1 << NF_INET_FORWARD),
     42	.match 		= xt_osf_match_packet,
     43	.matchsize	= sizeof(struct xt_osf_info),
     44	.me		= THIS_MODULE,
     45};
     46
     47static int __init xt_osf_init(void)
     48{
     49	int err;
     50
     51	err = xt_register_match(&xt_osf_match);
     52	if (err) {
     53		pr_err("Failed to register OS fingerprint "
     54		       "matching module (%d)\n", err);
     55		return err;
     56	}
     57
     58	return 0;
     59}
     60
     61static void __exit xt_osf_fini(void)
     62{
     63	xt_unregister_match(&xt_osf_match);
     64}
     65
     66module_init(xt_osf_init);
     67module_exit(xt_osf_fini);
     68
     69MODULE_LICENSE("GPL");
     70MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
     71MODULE_DESCRIPTION("Passive OS fingerprint matching.");
     72MODULE_ALIAS("ipt_osf");
     73MODULE_ALIAS("ip6t_osf");
     74MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_OSF);