Interworking: Add support for multiple home FQDNs

Credentials can now be configured with more than one FQDN ('domain'
field in the cred block) to perform Domain Name List matching against
multiple home domains.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

wpa_supplicant/README-HS20

@@ -166,9 +166,11 @@ Credentials can be pre-configured for automatic network selection:
 # milenage: Milenage parameters for SIM/USIM simulator in <Ki>:<OPc>:<SQN>
 #	format
 #
-# domain: Home service provider FQDN
+# domain: Home service provider FQDN(s)
 #	This is used to compare against the Domain Name List to figure out
-#	whether the AP is operated by the Home SP.
+#	whether the AP is operated by the Home SP. Multiple domain entries can
+#	be used to configure alternative FQDNs that will be considered home
+#	networks.
 #
 # roaming_consortium: Roaming Consortium OI
 #	If roaming_consortium_len is non-zero, this field contains the

wpa_supplicant/config.c

@@ -1855,6 +1855,8 @@ void wpa_config_free_ssid(struct wpa_ssid *ssid)
 
 void wpa_config_free_cred(struct wpa_cred *cred)
 {
+	size_t i;
+
 	os_free(cred->realm);
 	os_free(cred->username);
 	os_free(cred->password);
@@ -1864,6 +1866,8 @@ void wpa_config_free_cred(struct wpa_cred *cred)
 	os_free(cred->private_key_passwd);
 	os_free(cred->imsi);
 	os_free(cred->milenage);
+	for (i = 0; i < cred->num_domain; i++)
+		os_free(cred->domain[i]);
 	os_free(cred->domain);
 	os_free(cred->eap_method);
 	os_free(cred->phase1);
@@ -2437,8 +2441,16 @@ int wpa_config_set_cred(struct wpa_cred *cred, const char *var,
 	}
 
 	if (os_strcmp(var, "domain") == 0) {
-		os_free(cred->domain);
-		cred->domain = val;
+		char **new_domain;
+		new_domain = os_realloc_array(cred->domain,
+					      cred->num_domain + 1,
+					      sizeof(char *));
+		if (new_domain == NULL) {
+			os_free(val);
+			return -1;
+		}
+		new_domain[cred->num_domain++] = val;
+		cred->domain = new_domain;
 		return 0;
 	}
 

wpa_supplicant/config.h

@@ -150,12 +150,19 @@ struct wpa_cred {
 	char *milenage;
 
 	/**
-	 * domain - Home service provider FQDN
+	 * domain - Home service provider FQDN(s)
 	 *
 	 * This is used to compare against the Domain Name List to figure out
-	 * whether the AP is operated by the Home SP.
+	 * whether the AP is operated by the Home SP. Multiple domain entries
+	 * can be used to configure alternative FQDNs that will be considered
+	 * home networks.
 	 */
-	char *domain;
+	char **domain;
+
+	/**
+	 * num_domain - Number of FQDNs in the domain array
+	 */
+	size_t num_domain;
 
 	/**
 	 * roaming_consortium - Roaming Consortium OI

wpa_supplicant/config_file.c

@@ -728,6 +728,8 @@ static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 
 static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 {
+	size_t i;
+
 	if (cred->priority)
 		fprintf(f, "\tpriority=%d\n", cred->priority);
 	if (cred->pcsc)
@@ -753,10 +755,9 @@ static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 		fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
 	if (cred->milenage)
 		fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
-	if (cred->domain)
-		fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
+	for (i = 0; i < cred->num_domain; i++)
+		fprintf(f, "\tdomain=\"%s\"\n", cred->domain[i]);
 	if (cred->roaming_consortium_len) {
-		size_t i;
 		fprintf(f, "\troaming_consortium=");
 		for (i = 0; i < cred->roaming_consortium_len; i++)
 			fprintf(f, "%02x", cred->roaming_consortium[i]);
@@ -773,7 +774,7 @@ static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 	if (cred->phase2)
 		fprintf(f, "\tphase2=\"%s\"\n", cred->phase2);
 	if (cred->excluded_ssid) {
-		size_t i, j;
+		size_t j;
 		for (i = 0; i < cred->num_excluded_ssid; i++) {
 			struct excluded_ssid *e = &cred->excluded_ssid[i];
 			fprintf(f, "\texcluded_ssid=");

wpa_supplicant/ctrl_iface.c

@@ -1565,16 +1565,21 @@ static int wpa_supplicant_ctrl_iface_status(struct wpa_supplicant *wpa_s,
 		char *type;
 
 		for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
+			size_t i;
+
 			if (wpa_s->current_ssid->parent_cred != cred)
 				continue;
 			if (!cred->domain)
 				continue;
 
-			ret = os_snprintf(pos, end - pos, "home_sp=%s\n",
-					  cred->domain);
+			for (i = 0; i < cred->num_domain; i++) {
+				ret = os_snprintf(pos, end - pos,
+						  "home_sp=%s\n",
+						  cred->domain[i]);
 				if (ret < 0 || ret >= end - pos)
 					return pos - buf;
 				pos += ret;
+			}
 
 			if (wpa_s->current_bss == NULL ||
 			    wpa_s->current_bss->anqp == NULL)
@@ -2448,7 +2453,7 @@ static int wpa_supplicant_ctrl_iface_list_creds(struct wpa_supplicant *wpa_s,
 		ret = os_snprintf(pos, end - pos, "%d\t%s\t%s\t%s\t%s\n",
 				  cred->id, cred->realm ? cred->realm : "",
 				  cred->username ? cred->username : "",
-				  cred->domain ? cred->domain : "",
+				  cred->domain ? cred->domain[0] : "",
 				  cred->imsi ? cred->imsi : "");
 		if (ret < 0 || ret >= end - pos)
 			return pos - buf;
@@ -2533,9 +2538,16 @@ static int wpa_supplicant_ctrl_iface_remove_cred(struct wpa_supplicant *wpa_s,
 		while (cred) {
 			prev = cred;
 			cred = cred->next;
-			if (prev->domain &&
-			    os_strcmp(prev->domain, cmd + 8) == 0)
+			if (prev->domain) {
+				size_t i;
+				for (i = 0; i < prev->num_domain; i++) {
+					if (os_strcmp(prev->domain[i], cmd + 8)
+					    != 0)
+						continue;
 					wpas_ctrl_remove_cred(wpa_s, prev);
+					break;
+				}
+			}
 		}
 		return 0;
 	}

wpa_supplicant/interworking.c

@@ -1514,6 +1514,7 @@ int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
 			      struct wpa_cred *cred,
 			      struct wpabuf *domain_names)
 {
+	size_t i;
 #ifdef INTERWORKING_3GPP
 	char nai[100], *realm;
 
@@ -1544,10 +1545,12 @@ int interworking_home_sp_cred(struct wpa_supplicant *wpa_s,
 	if (domain_names == NULL || cred->domain == NULL)
 		return 0;
 
+	for (i = 0; i < cred->num_domain; i++) {
 		wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
-		   "home SP FQDN %s", cred->domain);
-	if (domain_name_list_contains(domain_names, cred->domain))
+			   "home SP FQDN %s", cred->domain[i]);
+		if (domain_name_list_contains(domain_names, cred->domain[i]))
 			return 1;
+	}
 
 	return 0;
 }

wpa_supplicant/wpa_supplicant.conf

@@ -399,9 +399,11 @@ fast_reauth=1
 # milenage: Milenage parameters for SIM/USIM simulator in <Ki>:<OPc>:<SQN>
 #	format
 #
-# domain: Home service provider FQDN
+# domain: Home service provider FQDN(s)
 #	This is used to compare against the Domain Name List to figure out
-#	whether the AP is operated by the Home SP.
+#	whether the AP is operated by the Home SP. Multiple domain entries can
+#	be used to configure alternative FQDNs that will be considered home
+#	networks.
 #
 # roaming_consortium: Roaming Consortium OI
 #	If roaming_consortium_len is non-zero, this field contains the