Use a shared helper function for RSN supplicant capabilities

Avoid practically copy-pasted code for determining local RSN
capabilities.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/rsn_supp/wpa_ft.c

@@ -178,7 +178,6 @@ static u8 * wpa_ft_gen_req_ies(struct wpa_sm *sm, size_t *len,
 	u8 *buf, *pos, *ftie_len, *ftie_pos, *fte_mic, *elem_count;
 	struct rsn_mdie *mdie;
 	struct rsn_ie_hdr *rsnie;
-	u16 capab;
 	int mdie_len;
 	u8 rsnxe[10];
 	size_t rsnxe_len;
@@ -258,16 +257,7 @@ static u8 * wpa_ft_gen_req_ies(struct wpa_sm *sm, size_t *len,
 	pos += RSN_SELECTOR_LEN;
 
 	/* RSN Capabilities */
-	capab = 0;
-	if (sm->mfp)
-		capab |= WPA_CAPABILITY_MFPC;
-	if (sm->mfp == 2)
-		capab |= WPA_CAPABILITY_MFPR;
-	if (sm->ocv)
-		capab |= WPA_CAPABILITY_OCVC;
-	if (sm->ext_key_id)
-		capab |= WPA_CAPABILITY_EXT_KEY_ID_FOR_UNICAST;
-	WPA_PUT_LE16(pos, capab);
+	WPA_PUT_LE16(pos, rsn_supp_capab(sm));
 	pos += 2;
 
 	/* PMKID Count */

src/rsn_supp/wpa_ie.c

@@ -105,6 +105,23 @@ static int wpa_gen_wpa_ie_wpa(u8 *wpa_ie, size_t wpa_ie_len,
 }
 
 
+u16 rsn_supp_capab(struct wpa_sm *sm)
+{
+	u16 capab = 0;
+
+	if (sm->mfp)
+		capab |= WPA_CAPABILITY_MFPC;
+	if (sm->mfp == 2)
+		capab |= WPA_CAPABILITY_MFPR;
+	if (sm->ocv)
+		capab |= WPA_CAPABILITY_OCVC;
+	if (sm->ext_key_id)
+		capab |= WPA_CAPABILITY_EXT_KEY_ID_FOR_UNICAST;
+
+	return capab;
+}
+
+
 static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
 			      int pairwise_cipher, int group_cipher,
 			      int key_mgmt, int mgmt_group_cipher,
@@ -112,7 +129,6 @@ static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
 {
 	u8 *pos;
 	struct rsn_ie_hdr *hdr;
-	u16 capab;
 	u32 suite;
 
 	if (rsn_ie_len < sizeof(*hdr) + RSN_SELECTOR_LEN +
@@ -214,16 +230,7 @@ static int wpa_gen_wpa_ie_rsn(u8 *rsn_ie, size_t rsn_ie_len,
 	pos += RSN_SELECTOR_LEN;
 
 	/* RSN Capabilities */
-	capab = 0;
-	if (sm->mfp)
-		capab |= WPA_CAPABILITY_MFPC;
-	if (sm->mfp == 2)
-		capab |= WPA_CAPABILITY_MFPR;
-	if (sm->ocv)
-		capab |= WPA_CAPABILITY_OCVC;
-	if (sm->ext_key_id)
-		capab |= WPA_CAPABILITY_EXT_KEY_ID_FOR_UNICAST;
-	WPA_PUT_LE16(pos, capab);
+	WPA_PUT_LE16(pos, rsn_supp_capab(sm));
 	pos += 2;
 
 	if (sm->cur_pmksa) {

src/rsn_supp/wpa_ie.h

@@ -13,5 +13,6 @@ struct wpa_sm;
 
 int wpa_gen_wpa_ie(struct wpa_sm *sm, u8 *wpa_ie, size_t wpa_ie_len);
 int wpa_gen_rsnxe(struct wpa_sm *sm, u8 *rsnxe, size_t rsnxe_len);
+u16 rsn_supp_capab(struct wpa_sm *sm);
 
 #endif /* WPA_IE_H */