/**
* pmksa_cache_set_current - Set the current PMKSA entry selection
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @pmkid: PMKID for selecting PMKSA or %NULL if not used
* @bssid: BSSID for PMKSA or %NULL if not used
* @network_ctx: Network configuration context
* @try_opportunistic: Whether to allow opportunistic PMKSA caching
* Returns: 0 if PMKSA was found or -1 if no matching entry was found
*/
int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
const u8 *bssid, void *network_ctx,
int try_opportunistic)
{
struct rsn_pmksa_cache *pmksa = sm->pmksa;
wpa_printf(MSG_DEBUG, "RSN: PMKSA cache search - network_ctx=%p "
"try_opportunistic=%d", network_ctx, try_opportunistic);
if (pmkid)
wpa_hexdump(MSG_DEBUG, "RSN: Search for PMKID",
pmkid, PMKID_LEN);
if (bssid)
wpa_printf(MSG_DEBUG, "RSN: Search for BSSID " MACSTR,
MAC2STR(bssid));
sm->cur_pmksa = NULL;
if (pmkid)
sm->cur_pmksa = pmksa_cache_get(pmksa, NULL, pmkid,
network_ctx);
if (sm->cur_pmksa == NULL && bssid)
sm->cur_pmksa = pmksa_cache_get(pmksa, bssid, NULL,
network_ctx);
if (sm->cur_pmksa == NULL && try_opportunistic && bssid)
sm->cur_pmksa = pmksa_cache_get_opportunistic(pmksa,
network_ctx,
bssid);
if (sm->cur_pmksa) {
wpa_hexdump(MSG_DEBUG, "RSN: PMKSA cache entry found - PMKID",
sm->cur_pmksa->pmkid, PMKID_LEN);
return 0;
}
wpa_printf(MSG_DEBUG, "RSN: No PMKSA cache entry found");
return -1;
}
/**
* pmksa_cache_set_current - Set the current PMKSA entry selection
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @pmkid: PMKID for selecting PMKSA or %NULL if not used
* @bssid: BSSID for PMKSA or %NULL if not used
* @ssid: The network configuration for the current network
* @try_opportunistic: Whether to allow opportunistic PMKSA caching
* Returns: 0 if PMKSA was found or -1 if no matching entry was found
*/
int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
const u8 *bssid, struct wpa_ssid *ssid,
int try_opportunistic)
{
sm->cur_pmksa = NULL;
if (pmkid)
sm->cur_pmksa = pmksa_cache_get(sm, NULL, pmkid);
if (sm->cur_pmksa == NULL && bssid)
sm->cur_pmksa = pmksa_cache_get(sm, bssid, NULL);
if (sm->cur_pmksa == NULL && try_opportunistic && bssid)
sm->cur_pmksa = pmksa_cache_get_opportunistic(sm, ssid, bssid);
if (sm->cur_pmksa) {
wpa_hexdump(MSG_DEBUG, "RSN: PMKID",
sm->cur_pmksa->pmkid, PMKID_LEN);
return 0;
}
return -1;
}
/**
* pmksa_cache_set_current - Set the current PMKSA entry selection
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @pmkid: PMKID for selecting PMKSA or %NULL if not used
* @bssid: BSSID for PMKSA or %NULL if not used
* @network_ctx: Network configuration context
* @try_opportunistic: Whether to allow opportunistic PMKSA caching
* Returns: 0 if PMKSA was found or -1 if no matching entry was found
*/
int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
const u8 *bssid, void *network_ctx,
int try_opportunistic)
{
struct rsn_pmksa_cache *pmksa = sm->pmksa;
sm->cur_pmksa = NULL;
if (pmkid)
sm->cur_pmksa = pmksa_cache_get(pmksa, NULL, pmkid);
if (sm->cur_pmksa == NULL && bssid)
sm->cur_pmksa = pmksa_cache_get(pmksa, bssid, NULL);
if (sm->cur_pmksa == NULL && try_opportunistic && bssid)
sm->cur_pmksa = pmksa_cache_get_opportunistic(pmksa,
network_ctx,
bssid);
if (sm->cur_pmksa) {
wpa_hexdump(MSG_DEBUG, "RSN: PMKID",
sm->cur_pmksa->pmkid, PMKID_LEN);
return 0;
}
return -1;
}
/**
* pmksa_candidate_add - Add a new PMKSA candidate
* @sm: Pointer to WPA state machine data from wpa_sm_init()
* @bssid: BSSID (authenticator address) of the candidate
* @prio: Priority (the smaller number, the higher priority)
* @preauth: Whether the candidate AP advertises support for pre-authentication
*
* This function is used to add PMKSA candidates for RSN pre-authentication. It
* is called from scan result processing and from driver events for PMKSA
* candidates, i.e., EVENT_PMKID_CANDIDATE events to wpa_supplicant_event().
*/
void pmksa_candidate_add(struct wpa_sm *sm, const u8 *bssid,
int prio, int preauth)
{
struct rsn_pmksa_candidate *cand, *prev, *pos;
if (sm->network_ctx && sm->proactive_key_caching)
pmksa_cache_get_opportunistic(sm->pmksa, sm->network_ctx,
bssid);
if (!preauth) {
wpa_printf(MSG_DEBUG, "RSN: Ignored PMKID candidate without "
"preauth flag");
return;
}
/* If BSSID already on candidate list, update the priority of the old
* entry. Do not override priority based on normal scan results. */
prev = NULL;
cand = sm->pmksa_candidates;
while (cand) {
if (os_memcmp(cand->bssid, bssid, ETH_ALEN) == 0) {
if (prev)
prev->next = cand->next;
else
sm->pmksa_candidates = cand->next;
break;
}
prev = cand;
cand = cand->next;
}
if (cand) {
if (prio < PMKID_CANDIDATE_PRIO_SCAN)
cand->priority = prio;
} else {
cand = os_zalloc(sizeof(*cand));
if (cand == NULL)
return;
os_memcpy(cand->bssid, bssid, ETH_ALEN);
cand->priority = prio;
}
/* Add candidate to the list; order by increasing priority value. i.e.,
* highest priority (smallest value) first. */
prev = NULL;
pos = sm->pmksa_candidates;
while (pos) {
if (cand->priority <= pos->priority)
break;
prev = pos;
pos = pos->next;
}
cand->next = pos;
if (prev)
prev->next = cand;
else
sm->pmksa_candidates = cand;
wpa_msg(sm->ctx->ctx, MSG_DEBUG, "RSN: added PMKSA cache "
"candidate " MACSTR " prio %d", MAC2STR(bssid), prio);
rsn_preauth_candidate_process(sm);
}
