4 files changed, 80 insertions, 0 deletions
diff --git a/include/net/netfilter/ipv4/nf_conntrack_ipv4.h b/include/net/netfilter/ipv4/nf_conntrack_ipv4.h
new file mode 100644
index 000000000..2c8c2b023
--- /dev/null
+++ b/include/net/netfilter/ipv4/nf_conntrack_ipv4.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * IPv4 support for nf_conntrack.
+ *
+ * 23 Mar 2004: Yasuyuki Kozakai @ USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *	- move L3 protocol dependent part from include/linux/netfilter_ipv4/
+ *	  ip_conntarck.h
+ */
+
+#ifndef _NF_CONNTRACK_IPV4_H
+#define _NF_CONNTRACK_IPV4_H
+
+extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp;
+extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_udp;
+extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp;
+#ifdef CONFIG_NF_CT_PROTO_DCCP
+extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp;
+#endif
+#ifdef CONFIG_NF_CT_PROTO_SCTP
+extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp;
+#endif
+#ifdef CONFIG_NF_CT_PROTO_UDPLITE
+extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite;
+#endif
+#ifdef CONFIG_NF_CT_PROTO_GRE
+extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre;
+#endif
+
+#endif /*_NF_CONNTRACK_IPV4_H*/
diff --git a/include/net/netfilter/ipv4/nf_defrag_ipv4.h b/include/net/netfilter/ipv4/nf_defrag_ipv4.h
new file mode 100644
index 000000000..7fda9ce9f
--- /dev/null
+++ b/include/net/netfilter/ipv4/nf_defrag_ipv4.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NF_DEFRAG_IPV4_H
+#define _NF_DEFRAG_IPV4_H
+
+struct net;
+int nf_defrag_ipv4_enable(struct net *net);
+void nf_defrag_ipv4_disable(struct net *net);
+
+#endif /* _NF_DEFRAG_IPV4_H */
diff --git a/include/net/netfilter/ipv4/nf_dup_ipv4.h b/include/net/netfilter/ipv4/nf_dup_ipv4.h
new file mode 100644
index 000000000..a2bc16cdb
--- /dev/null
+++ b/include/net/netfilter/ipv4/nf_dup_ipv4.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NF_DUP_IPV4_H_
+#define _NF_DUP_IPV4_H_
+
+#include <linux/skbuff.h>
+#include <uapi/linux/in.h>
+
+void nf_dup_ipv4(struct net *net, struct sk_buff *skb, unsigned int hooknum,
+		 const struct in_addr *gw, int oif);
+
+#endif /* _NF_DUP_IPV4_H_ */
diff --git a/include/net/netfilter/ipv4/nf_reject.h b/include/net/netfilter/ipv4/nf_reject.h
new file mode 100644
index 000000000..c653fcb88
--- /dev/null
+++ b/include/net/netfilter/ipv4/nf_reject.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _IPV4_NF_REJECT_H
+#define _IPV4_NF_REJECT_H
+
+#include <linux/skbuff.h>
+#include <net/ip.h>
+#include <net/icmp.h>
+#include <net/netfilter/nf_reject.h>
+
+void nf_send_unreach(struct sk_buff *skb_in, int code, int hook);
+void nf_send_reset(struct net *net, struct sock *, struct sk_buff *oldskb,
+		   int hook);
+const struct tcphdr *nf_reject_ip_tcphdr_get(struct sk_buff *oldskb,
+					     struct tcphdr *_oth, int hook);
+struct iphdr *nf_reject_iphdr_put(struct sk_buff *nskb,
+				  const struct sk_buff *oldskb,
+				  __u8 protocol, int ttl);
+void nf_reject_ip_tcphdr_put(struct sk_buff *nskb, const struct sk_buff *oldskb,
+			     const struct tcphdr *oth);
+
+struct sk_buff *nf_reject_skb_v4_unreach(struct net *net,
+                                         struct sk_buff *oldskb,
+                                         const struct net_device *dev,
+                                         int hook, u8 code);
+struct sk_buff *nf_reject_skb_v4_tcp_reset(struct net *net,
+					   struct sk_buff *oldskb,
+					   const struct net_device *dev,
+					   int hook);
+
+
+#endif /* _IPV4_NF_REJECT_H */