Add SIM identifier to the network profile and cred block

This allows the specific SIM to be identified for authentication
purposes in multi-SIM devices. This SIM number represents the index of
the SIM slot. This SIM number shall be used for the authentication using
the respective SIM for the Wi-Fi connection to the corresponding
network.

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

src/eap_peer/eap_config.h

@@ -678,6 +678,14 @@ struct eap_peer_config {
 	 * SIM/USIM processing.
 	 */
 	char *external_sim_resp;
+
+	/**
+	 * sim_num - User selected SIM identifier
+	 *
+	 * This variable is used for identifying which SIM is used if the system
+	 * has more than one.
+	 */
+	int sim_num;
 };
 
 

wpa_supplicant/README-HS20

@@ -270,6 +270,8 @@ Credentials can be pre-configured for automatic network selection:
 #	1 = try to use OCSP stapling, but not require response
 #	2 = require valid OCSP stapling response
 #
+# sim_num: Identifier for which SIM to use in multi-SIM devices
+#
 # for example:
 #
 #cred={

wpa_supplicant/config.c

@@ -1666,6 +1666,7 @@ static const struct parse_data ssid_fields[] = {
 	{ INTe(engine) },
 	{ INTe(engine2) },
 	{ INT(eapol_flags) },
+	{ INTe(sim_num) },
 #endif /* IEEE8021X_EAPOL */
 	{ FUNC_KEY(wep_key0) },
 	{ FUNC_KEY(wep_key1) },
@@ -2154,6 +2155,7 @@ void wpa_config_set_network_defaults(struct wpa_ssid *ssid)
 	ssid->eapol_flags = DEFAULT_EAPOL_FLAGS;
 	ssid->eap_workaround = DEFAULT_EAP_WORKAROUND;
 	ssid->eap.fragment_size = DEFAULT_FRAGMENT_SIZE;
+	ssid->eap.sim_num = DEFAULT_USER_SELECTED_SIM;
 #endif /* IEEE8021X_EAPOL */
 #ifdef CONFIG_HT_OVERRIDES
 	ssid->disable_ht = DEFAULT_DISABLE_HT;
@@ -2572,6 +2574,11 @@ int wpa_config_set_cred(struct wpa_cred *cred, const char *var,
 		return 0;
 	}
 
+	if (os_strcmp(var, "sim_num") == 0) {
+		cred->sim_num = atoi(value);
+		return 0;
+	}
+
 	val = wpa_config_parse_string(value, &len);
 	if (val == NULL) {
 		wpa_printf(MSG_ERROR, "Line %d: invalid field '%s' string "
@@ -3100,6 +3107,7 @@ struct wpa_cred * wpa_config_add_cred(struct wpa_config *config)
 	if (cred == NULL)
 		return NULL;
 	cred->id = id;
+	cred->sim_num = DEFAULT_USER_SELECTED_SIM;
 	if (last)
 		last->next = cred;
 	else

wpa_supplicant/config.h

@@ -288,6 +288,14 @@ struct wpa_cred {
 	 * 2 = require valid OCSP stapling response
 	 */
 	int ocsp;
+
+	/**
+	 * sim_num - User selected SIM identifier
+	 *
+	 * This variable is used for identifying which SIM is used if the system
+	 * has more than one.
+	 */
+	int sim_num;
 };
 
 

wpa_supplicant/config_file.c

@@ -219,6 +219,7 @@ static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
 	if (cred == NULL)
 		return NULL;
 	cred->id = id;
+	cred->sim_num = DEFAULT_USER_SELECTED_SIM;
 
 	while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
 		if (os_strcmp(pos, "}") == 0) {
@@ -712,6 +713,7 @@ static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 	STR(pac_file);
 	INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
 	INTe(ocsp);
+	INT_DEFe(sim_num, DEFAULT_USER_SELECTED_SIM);
 #endif /* IEEE8021X_EAPOL */
 	INT(mode);
 	INT(frequency);
@@ -858,6 +860,9 @@ static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
 				cred->required_roaming_consortium[i]);
 		fprintf(f, "\n");
 	}
+
+	if (cred->sim_num != DEFAULT_USER_SELECTED_SIM)
+		fprintf(f, "\tsim_num=%d\n", cred->sim_num);
 }
 
 

wpa_supplicant/config_ssid.h

@@ -34,6 +34,7 @@
 #define DEFAULT_DISABLE_MAX_AMSDU -1 /* no change */
 #define DEFAULT_AMPDU_FACTOR -1 /* no change */
 #define DEFAULT_AMPDU_DENSITY -1 /* no change */
+#define DEFAULT_USER_SELECTED_SIM 1
 
 struct psk_list_entry {
 	struct dl_list list;

wpa_supplicant/interworking.c

@@ -925,6 +925,7 @@ static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 		goto fail;
 	os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len);
 	ssid->ssid_len = bss->ssid_len;
+	ssid->eap.sim_num = cred->sim_num;
 
 	if (interworking_set_hs20_params(wpa_s, ssid) < 0)
 		goto fail;

wpa_supplicant/wpa_supplicant.conf

@@ -483,6 +483,8 @@ fast_reauth=1
 #	1 = try to use OCSP stapling, but not require response
 #	2 = require valid OCSP stapling response
 #
+# sim_num: Identifier for which SIM to use in multi-SIM devices
+#
 # for example:
 #
 #cred={