34 lines
1.0 KiB
C
34 lines
1.0 KiB
C
#ifndef _IP_NAT_HELPER_H
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#define _IP_NAT_HELPER_H
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/* NAT protocol helper routines. */
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#include <linux/netfilter_ipv4/ip_conntrack.h>
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#include <linux/module.h>
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struct sk_buff;
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/* These return true or false. */
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extern int ip_nat_mangle_tcp_packet(struct sk_buff **skb,
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struct ip_conntrack *ct,
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enum ip_conntrack_info ctinfo,
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unsigned int match_offset,
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unsigned int match_len,
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const char *rep_buffer,
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unsigned int rep_len);
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extern int ip_nat_mangle_udp_packet(struct sk_buff **skb,
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struct ip_conntrack *ct,
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enum ip_conntrack_info ctinfo,
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unsigned int match_offset,
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unsigned int match_len,
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const char *rep_buffer,
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unsigned int rep_len);
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extern int ip_nat_seq_adjust(struct sk_buff **pskb,
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struct ip_conntrack *ct,
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enum ip_conntrack_info ctinfo);
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/* Setup NAT on this expected conntrack so it follows master, but goes
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* to port ct->master->saved_proto. */
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extern void ip_nat_follow_master(struct ip_conntrack *ct,
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struct ip_conntrack_expect *this);
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#endif
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