include/net/sctp/auth.h

Source file repositories/reference/linux-study-clean/include/net/sctp/auth.h

File Facts

System
Linux kernel
Corpus path
include/net/sctp/auth.h
Extension
.h
Size
3639 bytes
Lines
108
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

struct sctp_hmac {
	__u16 hmac_id;		/* one of SCTP_AUTH_HMAC_ID_* */
	__u16 hmac_len;		/* length of the HMAC value in bytes */
};

/* 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);
const struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id);
const 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

Annotation

Implementation Notes