Interworking: Add support for using eap_proxy offload

Fetch IMSI through eap_proxy for Interworking network selection if
needed.

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

wpa_supplicant/interworking.c

@@ -1346,6 +1346,13 @@ static struct wpa_cred * interworking_credentials_available_3gpp(
 			goto compare;
 		}
 #endif /* PCSC_FUNCS */
+#ifdef CONFIG_EAP_PROXY
+		if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) {
+			imsi = wpa_s->imsi;
+			mnc_len = wpa_s->mnc_len;
+			goto compare;
+		}
+#endif /* CONFIG_EAP_PROXY */
 
 		if (cred->imsi == NULL || !cred->imsi[0] ||
 		    cred->milenage == NULL || !cred->milenage[0])
@@ -1358,9 +1365,9 @@ static struct wpa_cred * interworking_credentials_available_3gpp(
 		mnc_len = sep - cred->imsi - 3;
 		imsi = cred->imsi;
 
-#ifdef PCSC_FUNCS
+#if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY)
 	compare:
-#endif /* PCSC_FUNCS */
+#endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */
 		wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
 			   MACSTR, MAC2STR(bss->bssid));
 		ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len);

wpa_supplicant/wpa_supplicant.c

@@ -17,6 +17,7 @@
 #include "crypto/sha1.h"
 #include "eapol_supp/eapol_supp_sm.h"
 #include "eap_peer/eap.h"
+#include "eap_peer/eap_proxy.h"
 #include "eap_server/eap_methods.h"
 #include "rsn_supp/wpa.h"
 #include "eloop.h"
@@ -3010,6 +3011,20 @@ next_driver:
 	if (wpa_bss_init(wpa_s) < 0)
 		return -1;
 
+#ifdef CONFIG_EAP_PROXY
+{
+	size_t len;
+	wpa_s->mnc_len = eap_proxy_get_imsi(wpa_s->imsi, &len);
+	if (wpa_s->mnc_len > 0) {
+		wpa_s->imsi[len] = '\0';
+		wpa_printf(MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)",
+			   wpa_s->imsi, wpa_s->mnc_len);
+	} else {
+		wpa_printf(MSG_DEBUG, "eap_proxy: IMSI not available");
+	}
+}
+#endif /* CONFIG_EAP_PROXY */
+
 	if (pcsc_reader_init(wpa_s) < 0)
 		return -1;
 

wpa_supplicant/wpa_supplicant_i.h

@@ -407,10 +407,8 @@ struct wpa_supplicant {
 			     * previous association event */
 
 	struct scard_data *scard;
-#ifdef PCSC_FUNCS
 	char imsi[20];
 	int mnc_len;
-#endif /* PCSC_FUNCS */
 
 	unsigned char last_eapol_src[ETH_ALEN];