pmksa_cache.h revision c5ec7f57ead87efa365800228aa0b09a12d9e6c4 
1/*
2 * wpa_supplicant - WPA2/RSN PMKSA cache functions
3 * Copyright (c) 2003-2009, 2011-2012, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#ifndef PMKSA_CACHE_H
10#define PMKSA_CACHE_H
11
12/**
13 * struct rsn_pmksa_cache_entry - PMKSA cache entry
14 */
15struct rsn_pmksa_cache_entry {
16	struct rsn_pmksa_cache_entry *next;
17	u8 pmkid[PMKID_LEN];
18	u8 pmk[PMK_LEN];
19	size_t pmk_len;
20	os_time_t expiration;
21	int akmp; /* WPA_KEY_MGMT_* */
22	u8 aa[ETH_ALEN];
23
24	os_time_t reauth_time;
25
26	/**
27	 * network_ctx - Network configuration context
28	 *
29	 * This field is only used to match PMKSA cache entries to a specific
30	 * network configuration (e.g., a specific SSID and security policy).
31	 * This can be a pointer to the configuration entry, but PMKSA caching
32	 * code does not dereference the value and this could be any kind of
33	 * identifier.
34	 */
35	void *network_ctx;
36	int opportunistic;
37};
38
39struct rsn_pmksa_cache;
40
41#if defined(IEEE8021X_EAPOL) && !defined(CONFIG_NO_WPA2)
42
43struct rsn_pmksa_cache *
44pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
45				 void *ctx, int replace),
46		 void *ctx, struct wpa_sm *sm);
47void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa);
48struct rsn_pmksa_cache_entry * pmksa_cache_get(struct rsn_pmksa_cache *pmksa,
49					       const u8 *aa, const u8 *pmkid,
50					       const void *network_ctx);
51int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len);
52struct rsn_pmksa_cache_entry *
53pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len,
54		const u8 *aa, const u8 *spa, void *network_ctx, int akmp);
55struct rsn_pmksa_cache_entry * pmksa_cache_get_current(struct wpa_sm *sm);
56void pmksa_cache_clear_current(struct wpa_sm *sm);
57int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
58			    const u8 *bssid, void *network_ctx,
59			    int try_opportunistic);
60struct rsn_pmksa_cache_entry *
61pmksa_cache_get_opportunistic(struct rsn_pmksa_cache *pmksa,
62			      void *network_ctx, const u8 *aa);
63void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, void *network_ctx);
64
65#else /* IEEE8021X_EAPOL and !CONFIG_NO_WPA2 */
66
67static inline struct rsn_pmksa_cache *
68pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry,
69				 void *ctx, int replace),
70		 void *ctx, struct wpa_sm *sm)
71{
72	return (void *) -1;
73}
74
75static inline void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa)
76{
77}
78
79static inline struct rsn_pmksa_cache_entry *
80pmksa_cache_get(struct rsn_pmksa_cache *pmksa, const u8 *aa, const u8 *pmkid,
81		const void *network_ctx)
82{
83	return NULL;
84}
85
86static inline struct rsn_pmksa_cache_entry *
87pmksa_cache_get_current(struct wpa_sm *sm)
88{
89	return NULL;
90}
91
92static inline int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf,
93				   size_t len)
94{
95	return -1;
96}
97
98static inline struct rsn_pmksa_cache_entry *
99pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len,
100		const u8 *aa, const u8 *spa, void *network_ctx, int akmp)
101{
102	return NULL;
103}
104
105static inline void pmksa_cache_clear_current(struct wpa_sm *sm)
106{
107}
108
109static inline int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
110					  const u8 *bssid,
111					  void *network_ctx,
112					  int try_opportunistic)
113{
114	return -1;
115}
116
117static inline void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa,
118				     void *network_ctx)
119{
120}
121
122#endif /* IEEE8021X_EAPOL and !CONFIG_NO_WPA2 */
123
124#endif /* PMKSA_CACHE_H */
125