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ap: Implement Deauthentication on error

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This commit is contained in:
Andrew Zaborowski 2017-09-30 04:28:13 +02:00 committed by Denis Kenzior
parent 375e2262f2
commit 69687bedd1
1 changed files with 40 additions and 4 deletions
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44
src/ap.c
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@ -299,6 +299,9 @@ static void ap_set_rsn_info(struct ap_state *ap, struct ie_rsn_info *rsn)
rsn->group_cipher = IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC; rsn->group_cipher = IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC;
} }
static void ap_error_deauth_sta(struct sta_state *sta,
enum mmpdu_reason_code reason);
/* Default dot11RSNAConfigPairwiseUpdateCount value */ /* Default dot11RSNAConfigPairwiseUpdateCount value */
#define AP_PAIRWISE_UPDATE_COUNT 3 #define AP_PAIRWISE_UPDATE_COUNT 3
@ -381,7 +384,8 @@ static void ap_ptk_1_of_4_retry(struct l_timeout *timeout, void *user_data)
struct sta_state *sta = user_data; struct sta_state *sta = user_data;
if (sta->frame_retry >= AP_PAIRWISE_UPDATE_COUNT) { if (sta->frame_retry >= AP_PAIRWISE_UPDATE_COUNT) {
/* TODO: Send Deauthenticate */ ap_error_deauth_sta(sta,
MMPDU_REASON_CODE_4WAY_HANDSHAKE_TIMEOUT);
return; return;
} }
@ -456,7 +460,8 @@ static void ap_ptk_3_of_4_retry(struct l_timeout *timeout, void *user_data)
struct sta_state *sta = user_data; struct sta_state *sta = user_data;
if (sta->frame_retry >= AP_PAIRWISE_UPDATE_COUNT) { if (sta->frame_retry >= AP_PAIRWISE_UPDATE_COUNT) {
/* TODO: Send Deauthenticate */ ap_error_deauth_sta(sta,
MMPDU_REASON_CODE_4WAY_HANDSHAKE_TIMEOUT);
return; return;
} }
@ -501,9 +506,10 @@ static void ap_handle_ptk_2_of_4(struct sta_state *sta,
rsne = eapol_find_rsne(ek->key_data, rsne = eapol_find_rsne(ek->key_data,
L_BE16_TO_CPU(ek->key_data_len), NULL); L_BE16_TO_CPU(ek->key_data_len), NULL);
if (!rsne || rsne[1] != sta->assoc_rsne_len || if (!rsne || rsne[1] != sta->assoc_rsne_len ||
memcmp(rsne + 2, sta->assoc_rsne, rsne[1])) memcmp(rsne + 2, sta->assoc_rsne, rsne[1])) {
/* TODO: Send Deauthenticate */ ap_error_deauth_sta(sta, MMPDU_REASON_CODE_IE_DIFFERENT);
return; return;
}
memcpy(sta->ptk, ptk_buf, ptk_size); memcpy(sta->ptk, ptk_buf, ptk_size);
memcpy(sta->snonce, ek->key_nonce, sizeof(sta->snonce)); memcpy(sta->snonce, ek->key_nonce, sizeof(sta->snonce));
@ -800,6 +806,36 @@ static void ap_disassociate_sta(struct ap_state *ap, struct sta_state *sta)
} }
} }
static void ap_error_deauth_sta(struct sta_state *sta,
enum mmpdu_reason_code reason)
{
struct ap_state *ap = sta->ap;
const uint8_t *bssid = device_get_address(ap->device);
uint8_t mpdu_buf[128];
struct mmpdu_header *mpdu = (void *) mpdu_buf;
struct mmpdu_deauthentication *deauth;
memset(mpdu, 0, sizeof(*mpdu));
mpdu->fc.protocol_version = 0;
mpdu->fc.type = MPDU_TYPE_MANAGEMENT;
mpdu->fc.subtype = MPDU_MANAGEMENT_SUBTYPE_DEAUTHENTICATION;
memcpy(mpdu->address_1, sta->addr, 6); /* DA */
memcpy(mpdu->address_2, bssid, 6); /* SA */
memcpy(mpdu->address_3, bssid, 6); /* BSSID */
deauth = (void *) mmpdu_body(mpdu);
deauth->reason_code = L_CPU_TO_LE16(reason);
ap_send_mgmt_frame(ap, mpdu, deauth->ies - mpdu_buf, false, NULL, NULL);
if (sta->associated)
ap_disassociate_sta(ap, sta);
l_queue_remove(ap->sta_states, sta);
ap_sta_free(sta);
}
static bool ap_common_rates(struct l_uintset *ap_rates, static bool ap_common_rates(struct l_uintset *ap_rates,
struct l_uintset *sta_rates) struct l_uintset *sta_rates)
{ {