Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0-or-later */
/* SCTP kernel implementation
 * (C) Copyright 2007 Hewlett-Packard Development Company, L.P.
 *
 * This file is part of the SCTP kernel implementation
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <linux-sctp@vger.kernel.org>
 *
 * Written or modified by:
 *   Vlad Yasevich     <vladislav.yasevich@hp.com>
 */
 
#ifndef __sctp_auth_h__
#define __sctp_auth_h__
 
#include <linux/list.h>
#include <linux/refcount.h>
 
struct sctp_endpoint;
struct sctp_association;
struct sctp_authkey;
struct sctp_hmacalgo;
struct crypto_shash;
 
/*
 * Define a generic struct that will hold all the info
 * necessary for an HMAC transform
 */
struct sctp_hmac {
<------>__u16 hmac_id;		/* one of the above ids */
<------>char *hmac_name;	/* name for loading */
<------>__u16 hmac_len;		/* length of the signature */
};
 
/* This is generic structure that containst authentication bytes used
 * as keying material.  It's a what is referred to as byte-vector all
 * over SCTP-AUTH
 */
struct sctp_auth_bytes {
<------>refcount_t refcnt;
<------>__u32 len;
<------>__u8  data[];
};
 
/* Definition for a shared key, weather endpoint or association */
struct sctp_shared_key {
<------>struct list_head key_list;
<------>struct sctp_auth_bytes *key;
<------>refcount_t refcnt;
<------>__u16 key_id;
<------>__u8 deactivated;
};
 
#define key_for_each(__key, __list_head) \
<------>list_for_each_entry(__key, __list_head, key_list)
 
#define key_for_each_safe(__key, __tmp, __list_head) \
<------>list_for_each_entry_safe(__key, __tmp, __list_head, key_list)
 
static inline void sctp_auth_key_hold(struct sctp_auth_bytes *key)
{
<------>if (!key)
<------><------>return;
 
<------>refcount_inc(&key->refcnt);
}
 
void sctp_auth_key_put(struct sctp_auth_bytes *key);
struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp);
void sctp_auth_destroy_keys(struct list_head *keys);
int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp);
struct sctp_shared_key *sctp_auth_get_shkey(
<------><------><------><------>const struct sctp_association *asoc,
<------><------><------><------>__u16 key_id);
int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep,
<------><------><------><------>struct sctp_association *asoc,
<------><------><------><------>gfp_t gfp);
int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp);
void sctp_auth_destroy_hmacs(struct crypto_shash *auth_hmacs[]);
struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id);
struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc);
void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc,
<------><------><------><------>     struct sctp_hmac_algo_param *hmacs);
int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc,
<------><------><------><------>    __be16 hmac_id);
int sctp_auth_send_cid(enum sctp_cid chunk,
<------><------>       const struct sctp_association *asoc);
int sctp_auth_recv_cid(enum sctp_cid chunk,
<------><------>       const struct sctp_association *asoc);
void sctp_auth_calculate_hmac(const struct sctp_association *asoc,
<------><------><------>      struct sk_buff *skb, struct sctp_auth_chunk *auth,
<------><------><------>      struct sctp_shared_key *ep_key, gfp_t gfp);
void sctp_auth_shkey_release(struct sctp_shared_key *sh_key);
void sctp_auth_shkey_hold(struct sctp_shared_key *sh_key);
 
/* API Helpers */
int sctp_auth_ep_add_chunkid(struct sctp_endpoint *ep, __u8 chunk_id);
int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep,
<------><------><------>    struct sctp_hmacalgo *hmacs);
int sctp_auth_set_key(struct sctp_endpoint *ep, struct sctp_association *asoc,
<------><------>      struct sctp_authkey *auth_key);
int sctp_auth_set_active_key(struct sctp_endpoint *ep,
<------><------><------>     struct sctp_association *asoc, __u16 key_id);
int sctp_auth_del_key_id(struct sctp_endpoint *ep,
<------><------><------> struct sctp_association *asoc, __u16 key_id);
int sctp_auth_deact_key_id(struct sctp_endpoint *ep,
<------><------><------>   struct sctp_association *asoc, __u16 key_id);
int sctp_auth_init(struct sctp_endpoint *ep, gfp_t gfp);
void sctp_auth_free(struct sctp_endpoint *ep);
 
#endif