IBSS RSN: Provide ibss_rsn_get_peer() helper function

This is a useful function that simplifies some code and can eventually
be used somewhere else in future.

Signed-hostap: Antonio Quartulli <ordex@autistici.org>

wpa_supplicant/ibss_rsn.c

@@ -24,6 +24,18 @@
 #include "ibss_rsn.h"
 
 
+static struct ibss_rsn_peer * ibss_rsn_get_peer(struct ibss_rsn *ibss_rsn,
+						const u8 *addr)
+{
+	struct ibss_rsn_peer *peer;
+
+	for (peer = ibss_rsn->peers; peer; peer = peer->next)
+		if (os_memcmp(addr, peer->addr, ETH_ALEN) == 0)
+			break;
+	return peer;
+}
+
+
 static void ibss_rsn_free(struct ibss_rsn_peer *peer)
 {
 	wpa_auth_sta_deinit(peer->auth);
@@ -383,13 +395,11 @@ int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
 	if (ibss_rsn == NULL)
 		return -1;
 
-	for (peer = ibss_rsn->peers; peer; peer = peer->next) {
-		if (os_memcmp(addr, peer->addr, ETH_ALEN) == 0) {
-			wpa_printf(MSG_DEBUG, "RSN: IBSS Authenticator and "
-				   "Supplicant for peer " MACSTR " already "
-				   "running", MAC2STR(addr));
-			return 0;
-		}
+	if (ibss_rsn_get_peer(ibss_rsn, addr)) {
+		wpa_printf(MSG_DEBUG, "RSN: IBSS Authenticator and Supplicant "
+			   "for peer " MACSTR " already running",
+			   MAC2STR(addr));
+		return 0;
 	}
 
 	wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
@@ -577,11 +587,9 @@ int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
 	if (ibss_rsn == NULL)
 		return -1;
 
-	for (peer = ibss_rsn->peers; peer; peer = peer->next) {
-		if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
-			return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
-							 buf, len);
-	}
+	peer = ibss_rsn_get_peer(ibss_rsn, src_addr);
+	if (peer)
+		return ibss_rsn_process_rx_eapol(ibss_rsn, peer, buf, len);
 
 	if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
 		/*