+++ /dev/null
-/* This is a module which is used for setting the TOS field of a packet. */
-
-/* (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/ip.h>
-#include <net/checksum.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv4/ipt_TOS.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
-MODULE_DESCRIPTION("iptables TOS mangling module");
-
-static unsigned int
-tos_tg(struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, unsigned int hooknum,
- const struct xt_target *target, const void *targinfo)
-{
- const struct ipt_tos_target_info *tosinfo = targinfo;
- struct iphdr *iph = ip_hdr(skb);
-
- if ((iph->tos & IPTOS_TOS_MASK) != tosinfo->tos) {
- __u8 oldtos;
- if (!skb_make_writable(skb, sizeof(struct iphdr)))
- return NF_DROP;
- iph = ip_hdr(skb);
- oldtos = iph->tos;
- iph->tos = (iph->tos & IPTOS_PREC_MASK) | tosinfo->tos;
- csum_replace2(&iph->check, htons(oldtos), htons(iph->tos));
- }
- return XT_CONTINUE;
-}
-
-static bool
-tos_tg_check(const char *tablename, const void *e_void,
- const struct xt_target *target, void *targinfo,
- unsigned int hook_mask)
-{
- const u_int8_t tos = ((struct ipt_tos_target_info *)targinfo)->tos;
-
- if (tos != IPTOS_LOWDELAY
- && tos != IPTOS_THROUGHPUT
- && tos != IPTOS_RELIABILITY
- && tos != IPTOS_MINCOST
- && tos != IPTOS_NORMALSVC) {
- printk(KERN_WARNING "TOS: bad tos value %#x\n", tos);
- return false;
- }
- return true;
-}
-
-static struct xt_target tos_tg_reg __read_mostly = {
- .name = "TOS",
- .family = AF_INET,
- .target = tos_tg,
- .targetsize = sizeof(struct ipt_tos_target_info),
- .table = "mangle",
- .checkentry = tos_tg_check,
- .me = THIS_MODULE,
-};
-
-static int __init tos_tg_init(void)
-{
- return xt_register_target(&tos_tg_reg);
-}
-
-static void __exit tos_tg_exit(void)
-{
- xt_unregister_target(&tos_tg_reg);
-}
-
-module_init(tos_tg_init);
-module_exit(tos_tg_exit);