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eapol: Start a handshake timer

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We start a timer.  This handles the case that the Authenticator does
not send us the first message of the 4-way handshake, or disappears
before sending us the 3rd message.
This commit is contained in:
Denis Kenzior 2015-03-29 22:44:08 -05:00
parent a4af2e2947
commit 445ad55796
1 changed files with 22 additions and 6 deletions
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28
src/eapol.c
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@ -442,6 +442,7 @@ struct eapol_sm {
uint8_t anonce[32]; uint8_t anonce[32];
uint8_t ptk[64]; uint8_t ptk[64];
void *user_data; void *user_data;
struct l_timeout *timeout;
bool have_snonce:1; bool have_snonce:1;
bool have_replay:1; bool have_replay:1;
}; };
@ -452,6 +453,9 @@ static void eapol_sm_destroy(void *value)
l_free(sm->ap_rsn); l_free(sm->ap_rsn);
l_free(sm->own_rsn); l_free(sm->own_rsn);
l_timeout_remove(sm->timeout);
l_free(sm); l_free(sm);
} }
@ -509,12 +513,6 @@ void eapol_sm_set_user_data(struct eapol_sm *sm, void *user_data)
sm->user_data = user_data; sm->user_data = user_data;
} }
void eapol_start(uint32_t ifindex, struct eapol_sm *sm)
{
sm->ifindex = ifindex;
l_queue_push_head(state_machines, sm);
}
static bool eapol_sm_ifindex_match(void *data, void *user_data) static bool eapol_sm_ifindex_match(void *data, void *user_data)
{ {
struct eapol_sm *sm = data; struct eapol_sm *sm = data;
@ -546,6 +544,21 @@ static inline void handshake_failed(uint32_t ifindex, struct eapol_sm *sm,
eapol_sm_free(sm); eapol_sm_free(sm);
} }
static void eapol_timeout(struct l_timeout *timeout, void *user_data)
{
struct eapol_sm *sm = user_data;
handshake_failed(sm->ifindex, sm,
MPDU_REASON_CODE_4WAY_HANDSHAKE_TIMEOUT);
}
void eapol_start(uint32_t ifindex, struct eapol_sm *sm)
{
sm->ifindex = ifindex;
sm->timeout = l_timeout_create(2, eapol_timeout, sm, NULL);
l_queue_push_head(state_machines, sm);
}
static void eapol_handle_ptk_1_of_4(uint32_t ifindex, struct eapol_sm *sm, static void eapol_handle_ptk_1_of_4(uint32_t ifindex, struct eapol_sm *sm,
const struct eapol_key *ek, const struct eapol_key *ek,
void *user_data) void *user_data)
@ -593,6 +606,9 @@ static void eapol_handle_ptk_1_of_4(uint32_t ifindex, struct eapol_sm *sm,
memcpy(step2->key_mic_data, mic, sizeof(mic)); memcpy(step2->key_mic_data, mic, sizeof(mic));
tx_packet(ifindex, sm->aa, sm->spa, step2, user_data); tx_packet(ifindex, sm->aa, sm->spa, step2, user_data);
l_free(step2); l_free(step2);
l_timeout_remove(sm->timeout);
sm->timeout = NULL;
} }
static const uint8_t *eapol_find_gtk_kde(const uint8_t *data, size_t data_len, static const uint8_t *eapol_find_gtk_kde(const uint8_t *data, size_t data_len,