knownnetworks: get matched RC on match_roaming_consortium

The HS20 module had its own getter for returning the matched roaming
consortium. Since we already have the network_info op for matching
we might as well return the matched RC rather than just a bool. This
allows the RC to be included in (Re)Association without the need for
a specific getter.

src/hotspot.c

@@ -192,9 +192,11 @@ static bool hotspot_match_hessid(const struct network_info *info,
 	return !memcmp(config->hessid, hessid, 6);
 }
 
-static bool hotspot_match_roaming_consortium(const struct network_info *info,
+static const uint8_t *hotspot_match_roaming_consortium(
+						const struct network_info *info,
 						const uint8_t *rc_ie,
-						size_t rc_len)
+						size_t rc_len,
+						size_t *rc_len_out)
 {
 	const uint8_t *rc1, *rc2, *rc3;
 	size_t rc1_len, rc2_len, rc3_len;
@@ -202,26 +204,35 @@ static bool hotspot_match_roaming_consortium(const struct network_info *info,
 							super);
 
 	if (!config->rc || !rc_ie)
-		return false;
+		return NULL;
 
 	if (ie_parse_roaming_consortium_from_data(rc_ie, rc_ie[1] + 2, NULL,
 						&rc1, &rc1_len, &rc2, &rc2_len,
 						&rc3, &rc3_len) < 0)
-		return false;
+		return NULL;
 
 	/* rc1 is guarenteed to be set if the above returns success */
-	if (rc1_len == config->rc_len && !memcmp(rc1, config->rc, rc1_len))
-		return true;
+	if (rc1_len == config->rc_len && !memcmp(rc1, config->rc, rc1_len)) {
+		if (rc_len_out)
+			*rc_len_out = rc1_len;
+		return rc1;
+	}
 
 	if (rc2 && rc2_len == config->rc_len &&
-				!memcmp(rc2, config->rc, rc2_len))
-		return true;
+				!memcmp(rc2, config->rc, rc2_len)) {
+		if (rc_len_out)
+			*rc_len_out = rc2_len;
+		return rc2;
+	}
 
 	if (rc3 && rc1_len == config->rc_len &&
-				!memcmp(rc3, config->rc, rc3_len))
-		return true;
+				!memcmp(rc3, config->rc, rc3_len)) {
+		if (rc_len_out)
+			*rc_len_out = rc3_len;
+		return rc3;
+	}
 
-	return false;
+	return NULL;
 }
 
 static bool hotspot_match_nai_realms(const struct network_info *info,

src/knownnetworks.c

@@ -221,14 +221,17 @@ bool network_info_match_hessid(const struct network_info *info,
 	return info->ops->match_hessid(info, hessid);
 }
 
-bool network_info_match_roaming_consortium(const struct network_info *info,
+const uint8_t *network_info_match_roaming_consortium(
+						const struct network_info *info,
 						const uint8_t *rc,
-						size_t rc_len)
+						size_t rc_len,
+						size_t *rc_len_out)
 {
 	if (!info->ops->match_roaming_consortium)
-		return false;
+		return NULL;
 
-	return info->ops->match_roaming_consortium(info, rc, rc_len);
+	return info->ops->match_roaming_consortium(info, rc, rc_len,
+							rc_len_out);
 }
 
 bool network_info_match_nai_realm(const struct network_info *info,

src/knownnetworks.h

@@ -41,9 +41,11 @@ struct network_info_ops {
 
 	bool (*match_hessid)(const struct network_info *info,
 						const uint8_t *hessid);
-	bool (*match_roaming_consortium)(const struct network_info *info,
+	const uint8_t *(*match_roaming_consortium)(
+						const struct network_info *info,
 						const uint8_t *rc_ie,
-						size_t rc_len);
+						size_t rc_len,
+						size_t *rc_len_out);
 	bool (*match_nai_realms)(const struct network_info *info,
 						const char **nai_realms);
 };
@@ -96,9 +98,11 @@ const char *network_info_get_type(const struct network_info *info);
 
 bool network_info_match_hessid(const struct network_info *info,
 				const uint8_t *hessid);
-bool network_info_match_roaming_consortium(const struct network_info *info,
+const uint8_t *network_info_match_roaming_consortium(
+						const struct network_info *info,
 						const uint8_t *rc,
-						size_t rc_len);
+						size_t rc_len,
+						size_t *rc_len_out);
 bool network_info_match_nai_realm(const struct network_info *info,
 						const char **nai_realms);
 

src/network.c

@@ -575,7 +575,8 @@ static bool hotspot_info_matches(struct network *network,
 		return true;
 
 	if (network_info_match_roaming_consortium(info, bss->rc_ie,
-							bss->rc_ie[1] + 2))
+							bss->rc_ie[1] + 2,
+							NULL))
 		return true;
 
 	return false;