The C and C++ Include Header Files

/usr/include/linux/ipsec.h


$ cat -n /usr/include/linux/ipsec.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _LINUX_IPSEC_H
     3	#define _LINUX_IPSEC_H
     4	
     5	/* The definitions, required to talk to KAME racoon IKE. */
     6	
     7	#include <linux/pfkeyv2.h>
     8	
     9	#define IPSEC_PORT_ANY		0
    10	#define IPSEC_ULPROTO_ANY	255
    11	#define IPSEC_PROTO_ANY		255
    12	
    13	enum {
    14		IPSEC_MODE_ANY		= 0,	/* We do not support this for SA */
    15		IPSEC_MODE_TRANSPORT	= 1,
    16		IPSEC_MODE_TUNNEL	= 2,
    17		IPSEC_MODE_BEET         = 3
    18	};
    19	
    20	enum {
    21		IPSEC_DIR_ANY		= 0,
    22		IPSEC_DIR_INBOUND	= 1,
    23		IPSEC_DIR_OUTBOUND	= 2,
    24		IPSEC_DIR_FWD		= 3,	/* It is our own */
    25		IPSEC_DIR_MAX		= 4,
    26		IPSEC_DIR_INVALID	= 5
    27	};
    28	
    29	enum {
    30		IPSEC_POLICY_DISCARD	= 0,
    31		IPSEC_POLICY_NONE	= 1,
    32		IPSEC_POLICY_IPSEC	= 2,
    33		IPSEC_POLICY_ENTRUST	= 3,
    34		IPSEC_POLICY_BYPASS	= 4
    35	};
    36	
    37	enum {
    38		IPSEC_LEVEL_DEFAULT	= 0,
    39		IPSEC_LEVEL_USE		= 1,
    40		IPSEC_LEVEL_REQUIRE	= 2,
    41		IPSEC_LEVEL_UNIQUE	= 3
    42	};
    43	
    44	#define IPSEC_MANUAL_REQID_MAX	0x3fff
    45	
    46	#define IPSEC_REPLAYWSIZE  32
    47	
    48	#endif	/* _LINUX_IPSEC_H */