mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-20 18:39:12 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
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* 802_3
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*
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* Author:
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* Chris Vitale csv@bluetail.com
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*
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* May 2003
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*
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*/
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#include <linux/netfilter_bridge/ebtables.h>
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#include <linux/netfilter_bridge/ebt_802_3.h>
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#include <linux/module.h>
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static int ebt_filter_802_3(const struct sk_buff *skb, const struct net_device *in,
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const struct net_device *out, const void *data, unsigned int datalen)
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{
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struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
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struct ebt_802_3_hdr *hdr = ebt_802_3_hdr(skb);
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uint16_t type = hdr->llc.ui.ctrl & IS_UI ? hdr->llc.ui.type : hdr->llc.ni.type;
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if (info->bitmask & EBT_802_3_SAP) {
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if (FWINV(info->sap != hdr->llc.ui.ssap, EBT_802_3_SAP))
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return EBT_NOMATCH;
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if (FWINV(info->sap != hdr->llc.ui.dsap, EBT_802_3_SAP))
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return EBT_NOMATCH;
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}
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if (info->bitmask & EBT_802_3_TYPE) {
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if (!(hdr->llc.ui.dsap == CHECK_TYPE && hdr->llc.ui.ssap == CHECK_TYPE))
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return EBT_NOMATCH;
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if (FWINV(info->type != type, EBT_802_3_TYPE))
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return EBT_NOMATCH;
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}
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return EBT_MATCH;
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}
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static struct ebt_match filter_802_3;
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static int ebt_802_3_check(const char *tablename, unsigned int hookmask,
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const struct ebt_entry *e, void *data, unsigned int datalen)
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{
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struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
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if (datalen < sizeof(struct ebt_802_3_info))
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return -EINVAL;
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if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK)
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return -EINVAL;
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return 0;
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}
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static struct ebt_match filter_802_3 =
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{
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.name = EBT_802_3_MATCH,
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.match = ebt_filter_802_3,
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.check = ebt_802_3_check,
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.me = THIS_MODULE,
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};
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static int __init init(void)
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{
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return ebt_register_match(&filter_802_3);
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}
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static void __exit fini(void)
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{
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ebt_unregister_match(&filter_802_3);
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}
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module_init(init);
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module_exit(fini);
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MODULE_LICENSE("GPL");
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