Interworking: Use 3gppnetwork.org for matching home SP for SIM/USIM

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

diff --git a/wpa_supplicant/interworking.c b/wpa_supplicant/interworking.c
index e3c7cc2..08b24f4 100644 (file)
--- a/wpa_supplicant/interworking.c
+++ b/wpa_supplicant/interworking.c
@@ -505,10 +505,10 @@ static int plmn_id_match(struct wpabuf *anqp, const char *imsi)
 }
 
 
-static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
+static int build_root_nai(char *nai, const char *imsi, char prefix)
 {
        const char *sep, *msin;
-       char nai[100], *end, *pos;
+       char *end, *pos;
        size_t msin_len, plmn_len;
 
        /*
@@ -533,7 +533,8 @@ static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
 
        pos = nai;
        end = pos + sizeof(nai);
-       *pos++ = prefix;
+       if (prefix)
+               *pos++ = prefix;
        os_memcpy(pos, imsi, plmn_len);
        pos += plmn_len;
        os_memcpy(pos, msin, msin_len);
@@ -551,6 +552,15 @@ static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
        pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
                           imsi[0], imsi[1], imsi[2]);
 
+       return 0;
+}
+
+
+static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
+{
+       char nai[100];
+       if (build_root_nai(nai, imsi, prefix) < 0)
+               return -1;
        return wpa_config_set_quoted(ssid, "identity", nai);
 }
 
@@ -855,16 +865,13 @@ static int interworking_credentials_available(struct wpa_supplicant *wpa_s,
 }
 
 
-static int interworking_home_sp(struct wpa_supplicant *wpa_s,
-                               struct wpabuf *domain_names)
+static int domain_name_list_contains(struct wpabuf *domain_names,
+                                    const char *domain)
 {
        const u8 *pos, *end;
        size_t len;
 
-       if (wpa_s->conf->home_domain == NULL || domain_names == NULL)
-               return -1;
-
-       len = os_strlen(wpa_s->conf->home_domain);
+       len = os_strlen(domain);
        pos = wpabuf_head(domain_names);
        end = pos + wpabuf_len(domain_names);
 
@@ -872,9 +879,10 @@ static int interworking_home_sp(struct wpa_supplicant *wpa_s,
                if (pos + 1 + pos[0] > end)
                        break;
 
+               wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
+                                 pos + 1, pos[0]);
                if (pos[0] == len &&
-                   os_strncasecmp(wpa_s->conf->home_domain,
-                                  (const char *) (pos + 1), len) == 0)
+                   os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
                        return 1;
 
                pos += 1 + pos[0];
@@ -884,6 +892,39 @@ static int interworking_home_sp(struct wpa_supplicant *wpa_s,
 }
 
 
+static int interworking_home_sp(struct wpa_supplicant *wpa_s,
+                               struct wpabuf *domain_names)
+{
+#ifdef INTERWORKING_3GPP
+       char nai[100], *realm;
+#endif /* INTERWORKING_3GPP */
+
+       if (domain_names == NULL)
+               return -1;
+
+#ifdef INTERWORKING_3GPP
+       if (wpa_s->conf->home_imsi &&
+           build_root_nai(nai, wpa_s->conf->home_imsi, 0) == 0) {
+               realm = os_strchr(nai, '@');
+               if (realm)
+                       realm++;
+               wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
+                          "SIM/USIM domain %s", realm);
+               if (realm && domain_name_list_contains(domain_names, realm))
+                       return 1;
+       }
+#endif /* INTERWORKING_3GPP */
+
+       if (wpa_s->conf->home_domain == NULL)
+               return -1;
+
+       wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
+                  "home SP FQDN %s", wpa_s->conf->home_domain);
+       return domain_name_list_contains(domain_names,
+                                        wpa_s->conf->home_domain);
+}
+
+
 static void interworking_select_network(struct wpa_supplicant *wpa_s)
 {
        struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;