Merge get_seqnum_igtk() driver op with get_seqnum()

IEEE 802.11w uses distinct key indexes (4 and 5) so the same
get_seqnum() handler can be used to fetch packet number for both
TKIP/CCMP and BIP(using IGTK).

Since the new get_seqnum_igtk() handler was not actually implemented by
any driver wrapper, this may also fix BIP/IGTK sequence number reporting
with driver_nl80211.c.

hostapd/driver_i.h

@@ -103,16 +103,6 @@ hostapd_get_seqnum(const char *ifname, struct hostapd_data *hapd,
 					seq);
 }
 
-static inline int
-hostapd_get_seqnum_igtk(const char *ifname, struct hostapd_data *hapd,
-			const u8 *addr, int idx, u8 *seq)
-{
-	if (hapd->driver == NULL || hapd->driver->get_seqnum_igtk == NULL)
-		return -1;
-	return hapd->driver->get_seqnum_igtk(ifname, hapd->drv_priv, addr, idx,
-					     seq);
-}
-
 static inline int
 hostapd_flush(struct hostapd_data *hapd)
 {

hostapd/hostapd.c

@@ -614,15 +614,6 @@ static int hostapd_wpa_auth_get_seqnum(void *ctx, const u8 *addr, int idx,
 }
 
 
-static int hostapd_wpa_auth_get_seqnum_igtk(void *ctx, const u8 *addr, int idx,
-					    u8 *seq)
-{
-	struct hostapd_data *hapd = ctx;
-	return hostapd_get_seqnum_igtk(hapd->conf->iface, hapd, addr, idx,
-				       seq);
-}
-
-
 static int hostapd_wpa_auth_send_eapol(void *ctx, const u8 *addr,
 				       const u8 *data, size_t data_len,
 				       int encrypt)
@@ -894,7 +885,6 @@ static int hostapd_setup_wpa(struct hostapd_data *hapd)
 	cb.get_msk = hostapd_wpa_auth_get_msk;
 	cb.set_key = hostapd_wpa_auth_set_key;
 	cb.get_seqnum = hostapd_wpa_auth_get_seqnum;
-	cb.get_seqnum_igtk = hostapd_wpa_auth_get_seqnum_igtk;
 	cb.send_eapol = hostapd_wpa_auth_send_eapol;
 	cb.for_each_sta = hostapd_wpa_auth_for_each_sta;
 	cb.for_each_auth = hostapd_wpa_auth_for_each_auth;

hostapd/wpa.c

@@ -122,15 +122,6 @@ static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
 }
 
 
-static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
-					   const u8 *addr, int idx, u8 *seq)
-{
-	if (wpa_auth->cb.get_seqnum_igtk == NULL)
-		return -1;
-	return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
-}
-
-
 static inline int
 wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
 		    const u8 *data, size_t data_len, int encrypt)
@@ -1538,8 +1529,7 @@ static u8 * ieee80211w_kde_add(struct wpa_state_machine *sm, u8 *pos)
 
 	igtk.keyid[0] = gsm->GN_igtk;
 	igtk.keyid[1] = 0;
-	if (wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn)
-	    < 0)
+	if (wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, igtk.pn) < 0)
 		os_memset(igtk.pn, 0, sizeof(igtk.pn));
 	os_memcpy(igtk.igtk, gsm->IGTK[gsm->GN_igtk - 4], WPA_IGTK_LEN);
 	pos = wpa_add_kde(pos, RSN_KEY_DATA_IGTK,

hostapd/wpa.h

@@ -187,7 +187,6 @@ struct wpa_auth_callbacks {
 	int (*set_key)(void *ctx, int vlan_id, wpa_alg alg, const u8 *addr,
 		       int idx, u8 *key, size_t key_len);
 	int (*get_seqnum)(void *ctx, const u8 *addr, int idx, u8 *seq);
-	int (*get_seqnum_igtk)(void *ctx, const u8 *addr, int idx, u8 *seq);
 	int (*send_eapol)(void *ctx, const u8 *addr, const u8 *data,
 			  size_t data_len, int encrypt);
 	int (*for_each_sta)(void *ctx, int (*cb)(struct wpa_state_machine *sm,

hostapd/wpa_ft.c

@@ -393,17 +393,6 @@ static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
 }
 
 
-#ifdef CONFIG_IEEE80211W
-static inline int wpa_auth_get_seqnum_igtk(struct wpa_authenticator *wpa_auth,
-					   const u8 *addr, int idx, u8 *seq)
-{
-	if (wpa_auth->cb.get_seqnum_igtk == NULL)
-		return -1;
-	return wpa_auth->cb.get_seqnum_igtk(wpa_auth->cb.ctx, addr, idx, seq);
-}
-#endif /* CONFIG_IEEE80211W */
-
-
 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
 {
 	u8 *subelem;
@@ -478,7 +467,7 @@ static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
 	*pos++ = subelem_len - 2;
 	WPA_PUT_LE16(pos, gsm->GN_igtk);
 	pos += 2;
-	wpa_auth_get_seqnum_igtk(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
+	wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
 	pos += 6;
 	*pos++ = WPA_IGTK_LEN;
 	if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,

src/drivers/driver.h

@@ -1117,26 +1117,13 @@ struct wpa_driver_ops {
 	 * Returns: 0 on success, -1 on failure
 	 *
 	 * This function is used to fetch the last used TSC/packet number for
-	 * a TKIP or CCMP key.
+	 * a TKIP, CCMP, or BIP/IGTK key. It is mainly used with group keys, so
+	 * there is no strict requirement on implementing support for unicast
+	 * keys (i.e., addr != %NULL).
 	 */
 	int (*get_seqnum)(const char *ifname, void *priv, const u8 *addr,
 			  int idx, u8 *seq);
 
-	/**
-	 * get_seqnum_igtk - Fetch the IGTK packet number (AP only)
-	 * @ifname: The interface name (main or virtual)
-	 * @priv: Private driver interface data
-	 * @addr: %NULL for group keys
-	 * @idx: Key index
-	 * @seq: Buffer for returning the last used packet number
-	 * Returns: 0 on success, -1 on failure
-	 *
-	 * This function is used to fetch the last used packet number for an
-	 * IGTK key.
-	 */
-	int (*get_seqnum_igtk)(const char *ifname, void *priv, const u8 *addr,
-			       int idx, u8 *seq);
-
 	/**
 	 * flush - Flush all association stations (AP only)
 	 * @priv: Private driver interface data

src/drivers/driver_ndis.c

@@ -3211,7 +3211,6 @@ const struct wpa_driver_ops wpa_driver_ndis_ops = {
 	NULL /* set_ieee8021x */,
 	NULL /* set_privacy */,
 	NULL /* get_seqnum */,
-	NULL /* get_seqnum_igtk */,
 	NULL /* flush */,
 	NULL /* set_generic_elem */,
 	NULL /* read_sta_data */,