/* 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_SCTP
extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp;
#endif
#ifdef CONFIG_NF_CT_PROTO_GRE
extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre;
#endif

#if IS_ENABLED(CONFIG_NF_CONNTRACK_PPTP)
void gre_pptp_destroy_siblings(struct nf_conn *ct);
#endif

#endif /*_NF_CONNTRACK_IPV4_H*/