665b757809
Add some generic helper functions for netfilter. Signed-off-by: Patrick McHardy <kaber@trash.net>
39 lines
963 B
C
39 lines
963 B
C
#ifndef __LINUX_NETFILTER_H
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#define __LINUX_NETFILTER_H
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/* Responses from hook functions. */
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#define NF_DROP 0
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#define NF_ACCEPT 1
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#define NF_STOLEN 2
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#define NF_QUEUE 3
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#define NF_REPEAT 4
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#define NF_STOP 5
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#define NF_MAX_VERDICT NF_STOP
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/* we overload the higher bits for encoding auxiliary data such as the queue
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* number. Not nice, but better than additional function arguments. */
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#define NF_VERDICT_MASK 0x0000ffff
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#define NF_VERDICT_BITS 16
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#define NF_VERDICT_QMASK 0xffff0000
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#define NF_VERDICT_QBITS 16
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#define NF_QUEUE_NR(x) (((x << NF_VERDICT_QBITS) & NF_VERDICT_QMASK) | NF_QUEUE)
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/* only for userspace compatibility */
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/* Generic cache responses from hook functions.
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<= 0x2000 is used for protocol-flags. */
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#define NFC_UNKNOWN 0x4000
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#define NFC_ALTERED 0x8000
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enum nf_inet_hooks {
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NF_INET_PRE_ROUTING,
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NF_INET_LOCAL_IN,
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NF_INET_FORWARD,
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NF_INET_LOCAL_OUT,
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NF_INET_POST_ROUTING,
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NF_INET_NUMHOOKS,
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};
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#endif /*__LINUX_NETFILTER_H*/
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