WPS: Add command for fetching carrier record for NFC handover

Control interface command "NFC_GET_HANDOVER_SEL NDEF WPS-CR" can now be
used to fetch WPS carrier record from hostapd.

Signed-hostap: Jouni Malinen <j@w1.fi>

hostapd/ctrl_iface.c

@@ -352,6 +352,46 @@ static int hostapd_ctrl_iface_wps_nfc_token(struct hostapd_data *hapd,
 
 	return -1;
 }
+
+
+static int hostapd_ctrl_iface_nfc_get_handover_sel(struct hostapd_data *hapd,
+						   char *cmd, char *reply,
+						   size_t max_len)
+{
+	struct wpabuf *buf;
+	int res;
+	char *pos;
+	int ndef;
+
+	pos = os_strchr(cmd, ' ');
+	if (pos == NULL)
+		return -1;
+	*pos++ = '\0';
+
+	if (os_strcmp(cmd, "WPS") == 0)
+		ndef = 0;
+	else if (os_strcmp(cmd, "NDEF") == 0)
+		ndef = 1;
+	else
+		return -1;
+
+	if (os_strcmp(pos, "WPS-CR") == 0)
+		buf = hostapd_wps_nfc_hs_cr(hapd, ndef);
+	else
+		buf = NULL;
+	if (buf == NULL)
+		return -1;
+
+	res = wpa_snprintf_hex_uppercase(reply, max_len, wpabuf_head(buf),
+					 wpabuf_len(buf));
+	reply[res++] = '\n';
+	reply[res] = '\0';
+
+	wpabuf_free(buf);
+
+	return res;
+}
+
 #endif /* CONFIG_WPS_NFC */
 
 
@@ -913,6 +953,9 @@ static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
 	} else if (os_strncmp(buf, "WPS_NFC_TOKEN ", 14) == 0) {
 		reply_len = hostapd_ctrl_iface_wps_nfc_token(
 			hapd, buf + 14, reply, reply_size);
+	} else if (os_strncmp(buf, "NFC_GET_HANDOVER_SEL ", 21) == 0) {
+		reply_len = hostapd_ctrl_iface_nfc_get_handover_sel(
+			hapd, buf + 21, reply, reply_size);
 #endif /* CONFIG_WPS_NFC */
 #endif /* CONFIG_WPS */
 #ifdef CONFIG_WNM

hostapd/hostapd_cli.c

@@ -470,6 +470,29 @@ static int hostapd_cli_cmd_wps_nfc_token(struct wpa_ctrl *ctrl,
 	}
 	return wpa_ctrl_command(ctrl, cmd);
 }
+
+
+static int hostapd_cli_cmd_nfc_get_handover_sel(struct wpa_ctrl *ctrl,
+						int argc, char *argv[])
+{
+	char cmd[64];
+	int res;
+
+	if (argc != 2) {
+		printf("Invalid 'nfc_get_handover_sel' command - two arguments "
+		       "are required.\n");
+		return -1;
+	}
+
+	res = os_snprintf(cmd, sizeof(cmd), "NFC_GET_HANDOVER_SEL %s %s",
+			  argv[0], argv[1]);
+	if (res < 0 || (size_t) res >= sizeof(cmd) - 1) {
+		printf("Too long NFC_GET_HANDOVER_SEL command.\n");
+		return -1;
+	}
+	return wpa_ctrl_command(ctrl, cmd);
+}
+
 #endif /* CONFIG_WPS_NFC */
 
 
@@ -791,6 +814,7 @@ static struct hostapd_cli_cmd hostapd_cli_commands[] = {
 	{ "wps_nfc_tag_read", hostapd_cli_cmd_wps_nfc_tag_read },
 	{ "wps_nfc_config_token", hostapd_cli_cmd_wps_nfc_config_token },
 	{ "wps_nfc_token", hostapd_cli_cmd_wps_nfc_token },
+	{ "nfc_get_handover_sel", hostapd_cli_cmd_nfc_get_handover_sel },
 #endif /* CONFIG_WPS_NFC */
 	{ "wps_ap_pin", hostapd_cli_cmd_wps_ap_pin },
 	{ "wps_config", hostapd_cli_cmd_wps_config },

src/ap/wps_hostapd.c

@@ -1583,6 +1583,16 @@ struct wpabuf * hostapd_wps_nfc_config_token(struct hostapd_data *hapd,
 }
 
 
+struct wpabuf * hostapd_wps_nfc_hs_cr(struct hostapd_data *hapd, int ndef)
+{
+	/*
+	 * Handover Select carrier record for WPS uses the same format as
+	 * configuration token.
+	 */
+	return hostapd_wps_nfc_config_token(hapd, ndef);
+}
+
+
 struct wpabuf * hostapd_wps_nfc_token_gen(struct hostapd_data *hapd, int ndef)
 {
 	return wps_nfc_token_gen(ndef, &hapd->conf->wps_nfc_dev_pw_id,

src/ap/wps_hostapd.h

@@ -35,6 +35,7 @@ int hostapd_wps_nfc_tag_read(struct hostapd_data *hapd,
 			     const struct wpabuf *data);
 struct wpabuf * hostapd_wps_nfc_config_token(struct hostapd_data *hapd,
 					     int ndef);
+struct wpabuf * hostapd_wps_nfc_hs_cr(struct hostapd_data *hapd, int ndef);
 struct wpabuf * hostapd_wps_nfc_token_gen(struct hostapd_data *hapd, int ndef);
 int hostapd_wps_nfc_token_enable(struct hostapd_data *hapd);
 void hostapd_wps_nfc_token_disable(struct hostapd_data *hapd);