The C and C++ Include Header Files

/usr/include/linux/if_alg.h


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

     1	/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
     2	/*
     3	 * if_alg: User-space algorithm interface
     4	 *
     5	 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
     6	 *
     7	 * This program is free software; you can redistribute it and/or modify it
     8	 * under the terms of the GNU General Public License as published by the Free
     9	 * Software Foundation; either version 2 of the License, or (at your option)
    10	 * any later version.
    11	 *
    12	 */
    13	
    14	#ifndef _LINUX_IF_ALG_H
    15	#define _LINUX_IF_ALG_H
    16	
    17	#include <linux/types.h>
    18	
    19	struct sockaddr_alg {
    20		__u16	salg_family;
    21		__u8	salg_type[14];
    22		__u32	salg_feat;
    23		__u32	salg_mask;
    24		__u8	salg_name[64];
    25	};
    26	
    27	/*
    28	 * Linux v4.12 and later removed the 64-byte limit on salg_name[]; it's now an
    29	 * arbitrary-length field.  We had to keep the original struct above for source
    30	 * compatibility with existing userspace programs, though.  Use the new struct
    31	 * below if support for very long algorithm names is needed.  To do this,
    32	 * allocate 'sizeof(struct sockaddr_alg_new) + strlen(algname) + 1' bytes, and
    33	 * copy algname (including the null terminator) into salg_name.
    34	 */
    35	struct sockaddr_alg_new {
    36		__u16	salg_family;
    37		__u8	salg_type[14];
    38		__u32	salg_feat;
    39		__u32	salg_mask;
    40		__u8	salg_name[];
    41	};
    42	
    43	struct af_alg_iv {
    44		__u32	ivlen;
    45		__u8	iv[];
    46	};
    47	
    48	/* Socket options */
    49	#define ALG_SET_KEY			1
    50	#define ALG_SET_IV			2
    51	#define ALG_SET_OP			3
    52	#define ALG_SET_AEAD_ASSOCLEN		4
    53	#define ALG_SET_AEAD_AUTHSIZE		5
    54	#define ALG_SET_DRBG_ENTROPY		6
    55	#define ALG_SET_KEY_BY_KEY_SERIAL	7
    56	
    57	/* Operations */
    58	#define ALG_OP_DECRYPT			0
    59	#define ALG_OP_ENCRYPT			1
    60	
    61	#endif	/* _LINUX_IF_ALG_H */