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FT: Use dl_list for PMK-R0/R1 cache

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This makes it easier to remove expired entries from the list.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
This commit is contained in:
Michael Braun 2017-05-18 15:21:50 +02:00 committed by Jouni Malinen
parent 89dea17e13
commit 09211c9894
1 changed files with 50 additions and 35 deletions
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85
src/ap/wpa_auth_ft.c
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@ -834,7 +834,7 @@ static int wpa_ft_new_seq(struct ft_remote_seq *rkh_seq,
struct wpa_ft_pmk_r0_sa {
struct wpa_ft_pmk_r0_sa *next;
struct dl_list list;
u8 pmk_r0[PMK_LEN];
u8 pmk_r0_name[WPA_PMK_NAME_LEN];
u8 spa[ETH_ALEN];
@ -844,7 +844,7 @@ struct wpa_ft_pmk_r0_sa {
};
struct wpa_ft_pmk_r1_sa {
struct wpa_ft_pmk_r1_sa *next;
struct dl_list list;
u8 pmk_r1[PMK_LEN];
u8 pmk_r1_name[WPA_PMK_NAME_LEN];
u8 spa[ETH_ALEN];
@ -853,15 +853,44 @@ struct wpa_ft_pmk_r1_sa {
};
struct wpa_ft_pmk_cache {
struct wpa_ft_pmk_r0_sa *pmk_r0;
struct wpa_ft_pmk_r1_sa *pmk_r1;
struct dl_list pmk_r0; /* struct wpa_ft_pmk_r0_sa */
struct dl_list pmk_r1; /* struct wpa_ft_pmk_r1_sa */
};
static void wpa_ft_free_pmk_r0(struct wpa_ft_pmk_r0_sa *r0)
{
if (!r0)
return;
dl_list_del(&r0->list);
os_memset(r0->pmk_r0, 0, PMK_LEN);
os_free(r0);
}
static void wpa_ft_free_pmk_r1(struct wpa_ft_pmk_r1_sa *r1)
{
if (!r1)
return;
dl_list_del(&r1->list);
os_memset(r1->pmk_r1, 0, PMK_LEN);
os_free(r1);
}
struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
{
struct wpa_ft_pmk_cache *cache;
cache = os_zalloc(sizeof(*cache));
if (cache) {
dl_list_init(&cache->pmk_r0);
dl_list_init(&cache->pmk_r1);
}
return cache;
}
@ -872,21 +901,13 @@ void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
struct wpa_ft_pmk_r0_sa *r0, *r0prev;
struct wpa_ft_pmk_r1_sa *r1, *r1prev;
r0 = cache->pmk_r0;
while (r0) {
r0prev = r0;
r0 = r0->next;
os_memset(r0prev->pmk_r0, 0, PMK_LEN);
os_free(r0prev);
}
dl_list_for_each_safe(r0, r0prev, &cache->pmk_r0,
struct wpa_ft_pmk_r0_sa, list)
wpa_ft_free_pmk_r0(r0);
r1 = cache->pmk_r1;
while (r1) {
r1prev = r1;
r1 = r1->next;
os_memset(r1prev->pmk_r1, 0, PMK_LEN);
os_free(r1prev);
}
dl_list_for_each_safe(r1, r1prev, &cache->pmk_r1,
struct wpa_ft_pmk_r1_sa, list)
wpa_ft_free_pmk_r1(r1);
os_free(cache);
}
@ -910,8 +931,7 @@ static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
os_memcpy(r0->spa, spa, ETH_ALEN);
r0->pairwise = pairwise;
r0->next = cache->pmk_r0;
cache->pmk_r0 = r0;
dl_list_add(&cache->pmk_r0, &r0->list);
return 0;
}
@ -924,16 +944,13 @@ static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
struct wpa_ft_pmk_r0_sa *r0;
r0 = cache->pmk_r0;
while (r0) {
dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
os_memcmp_const(r0->pmk_r0_name, pmk_r0_name,
WPA_PMK_NAME_LEN) == 0) {
*r0_out = r0;
return 0;
}
r0 = r0->next;
}
*r0_out = NULL;
@ -959,8 +976,7 @@ static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
os_memcpy(r1->spa, spa, ETH_ALEN);
r1->pairwise = pairwise;
r1->next = cache->pmk_r1;
cache->pmk_r1 = r1;
dl_list_add(&cache->pmk_r1, &r1->list);
return 0;
}
@ -973,8 +989,7 @@ static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
struct wpa_ft_pmk_r1_sa *r1;
r1 = cache->pmk_r1;
while (r1) {
dl_list_for_each(r1, &cache->pmk_r1, struct wpa_ft_pmk_r1_sa, list) {
if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
os_memcmp_const(r1->pmk_r1_name, pmk_r1_name,
WPA_PMK_NAME_LEN) == 0) {
@ -983,8 +998,6 @@ static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
*pairwise = r1->pairwise;
return 0;
}
r1 = r1->next;
}
return -1;
@ -3610,7 +3623,8 @@ static int wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
{
struct wpa_ft_pmk_r0_sa *r0;
struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
struct wpa_ft_pmk_r0_sa *r0, *r0found = NULL;
struct ft_remote_r1kh *r1kh;
if (!wpa_auth->conf.pmk_r1_push)
@ -3618,13 +3632,14 @@ void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
if (!wpa_auth->conf.r1kh_list)
return;
r0 = wpa_auth->ft_pmk_cache->pmk_r0;
while (r0) {
if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
dl_list_for_each(r0, &cache->pmk_r0, struct wpa_ft_pmk_r0_sa, list) {
if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0) {
r0found = r0;
break;
r0 = r0->next;
}
}
r0 = r0found;
if (r0 == NULL || r0->pmk_r1_pushed)
return;
r0->pmk_r1_pushed = 1;