ipt_TOS.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /* Kernel module to match TOS values. */
- #include <linux/module.h>
- #include <linux/skbuff.h>
- #include <linux/netfilter_ipv4/ipt_tos.h>
- #include <linux/netfilter_ipv4/ip_tables.h>
- static int
- match(const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const void *matchinfo,
- int offset,
- const void *hdr,
- u_int16_t datalen,
- int *hotdrop)
- {
- const struct ipt_tos_info *info = matchinfo;
- const struct iphdr *iph = skb->nh.iph;
- return (iph->tos == info->tos) ^ info->invert;
- }
- static int
- checkentry(const char *tablename,
- const struct ipt_ip *ip,
- void *matchinfo,
- unsigned int matchsize,
- unsigned int hook_mask)
- {
- if (matchsize != IPT_ALIGN(sizeof(struct ipt_tos_info)))
- return 0;
- return 1;
- }
- static struct ipt_match tos_match
- = { { NULL, NULL }, "tos", &match, &checkentry, NULL, THIS_MODULE };
- static int __init init(void)
- {
- return ipt_register_match(&tos_match);
- }
- static void __exit fini(void)
- {
- ipt_unregister_match(&tos_match);
- }
- module_init(init);
- module_exit(fini);
- MODULE_LICENSE("GPL");