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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* net/sched/em_u32.c U32 Ematch
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*
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* Authors: Thomas Graf <tgraf@suug.ch>
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* Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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* Based on net/sched/cls_u32.c
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/skbuff.h>
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#include <net/pkt_cls.h>
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static int em_u32_match(struct sk_buff *skb, struct tcf_ematch *em,
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struct tcf_pkt_info *info)
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{
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struct tc_u32_key *key = (struct tc_u32_key *) em->data;
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const unsigned char *ptr = skb_network_header(skb);
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if (info) {
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if (info->ptr)
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ptr = info->ptr;
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ptr += (info->nexthdr & key->offmask);
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}
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ptr += key->off;
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if (!tcf_valid_offset(skb, ptr, sizeof(u32)))
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return 0;
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return !(((*(__be32 *) ptr) ^ key->val) & key->mask);
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}
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static struct tcf_ematch_ops em_u32_ops = {
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.kind = TCF_EM_U32,
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.datalen = sizeof(struct tc_u32_key),
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.match = em_u32_match,
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.owner = THIS_MODULE,
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.link = LIST_HEAD_INIT(em_u32_ops.link)
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};
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static int __init init_em_u32(void)
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{
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return tcf_em_register(&em_u32_ops);
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}
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static void __exit exit_em_u32(void)
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{
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tcf_em_unregister(&em_u32_ops);
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}
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MODULE_LICENSE("GPL");
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module_init(init_em_u32);
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module_exit(exit_em_u32);
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MODULE_ALIAS_TCF_EMATCH(TCF_EM_U32);
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