mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
db3d99c090
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
/*
|
|
* net/sched/em_u32.c U32 Ematch
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
* Authors: Thomas Graf <tgraf@suug.ch>
|
|
* Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
|
|
*
|
|
* Based on net/sched/cls_u32.c
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/skbuff.h>
|
|
#include <net/pkt_cls.h>
|
|
|
|
static int em_u32_match(struct sk_buff *skb, struct tcf_ematch *em,
|
|
struct tcf_pkt_info *info)
|
|
{
|
|
struct tc_u32_key *key = (struct tc_u32_key *) em->data;
|
|
const unsigned char *ptr = skb_network_header(skb);
|
|
|
|
if (info) {
|
|
if (info->ptr)
|
|
ptr = info->ptr;
|
|
ptr += (info->nexthdr & key->offmask);
|
|
}
|
|
|
|
ptr += key->off;
|
|
|
|
if (!tcf_valid_offset(skb, ptr, sizeof(u32)))
|
|
return 0;
|
|
|
|
return !(((*(u32*) ptr) ^ key->val) & key->mask);
|
|
}
|
|
|
|
static struct tcf_ematch_ops em_u32_ops = {
|
|
.kind = TCF_EM_U32,
|
|
.datalen = sizeof(struct tc_u32_key),
|
|
.match = em_u32_match,
|
|
.owner = THIS_MODULE,
|
|
.link = LIST_HEAD_INIT(em_u32_ops.link)
|
|
};
|
|
|
|
static int __init init_em_u32(void)
|
|
{
|
|
return tcf_em_register(&em_u32_ops);
|
|
}
|
|
|
|
static void __exit exit_em_u32(void)
|
|
{
|
|
tcf_em_unregister(&em_u32_ops);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(init_em_u32);
|
|
module_exit(exit_em_u32);
|
|
|
|
MODULE_ALIAS_TCF_EMATCH(TCF_EM_U32);
|