Handle Wi-Fi Display commands more carefully if P2P is disabled
If P2P was disabled (e.g., due to driver not supporting it or through p2p_disabled=1 configuration), setting Wi-Fi Display parameters could result in segmentation fault when the WFD IE is updated without the P2P module being initialized. Fix this by skipping the update if P2P module is not in use. In addition, show Wi-Fi Display as disabled in "GET wifi_display" and refuse to enable it with "SET wifi_display 1" if P2P is not enabled. Signed-hostap: Jouni Malinen <j@w1.fi>
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2 changed files with 15 additions and 3 deletions
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@ -440,7 +440,11 @@ static int wpa_supplicant_ctrl_iface_set(struct wpa_supplicant *wpa_s,
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ret = wpa_drv_set_p2p_powersave(wpa_s, atoi(value), -1, -1);
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ret = wpa_drv_set_p2p_powersave(wpa_s, atoi(value), -1, -1);
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#ifdef CONFIG_WIFI_DISPLAY
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#ifdef CONFIG_WIFI_DISPLAY
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} else if (os_strcasecmp(cmd, "wifi_display") == 0) {
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} else if (os_strcasecmp(cmd, "wifi_display") == 0) {
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wifi_display_enable(wpa_s->global, !!atoi(value));
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int enabled = !!atoi(value);
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if (enabled && !wpa_s->global->p2p)
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ret = -1;
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else
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wifi_display_enable(wpa_s->global, enabled);
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#endif /* CONFIG_WIFI_DISPLAY */
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#endif /* CONFIG_WIFI_DISPLAY */
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} else if (os_strcasecmp(cmd, "bssid_filter") == 0) {
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} else if (os_strcasecmp(cmd, "bssid_filter") == 0) {
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ret = set_bssid_filter(wpa_s, value);
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ret = set_bssid_filter(wpa_s, value);
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@ -475,8 +479,13 @@ static int wpa_supplicant_ctrl_iface_get(struct wpa_supplicant *wpa_s,
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wpa_s->conf->country[1]);
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wpa_s->conf->country[1]);
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#ifdef CONFIG_WIFI_DISPLAY
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#ifdef CONFIG_WIFI_DISPLAY
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} else if (os_strcasecmp(cmd, "wifi_display") == 0) {
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} else if (os_strcasecmp(cmd, "wifi_display") == 0) {
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res = os_snprintf(buf, buflen, "%d",
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int enabled;
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wpa_s->global->wifi_display);
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if (wpa_s->global->p2p == NULL ||
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wpa_s->global->p2p_disabled)
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enabled = 0;
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else
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enabled = wpa_s->global->wifi_display;
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res = os_snprintf(buf, buflen, "%d", enabled);
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if (res < 0 || (unsigned int) res >= buflen)
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if (res < 0 || (unsigned int) res >= buflen)
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return -1;
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return -1;
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return res;
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return res;
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@ -41,6 +41,9 @@ static int wifi_display_update_wfd_ie(struct wpa_global *global)
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struct wpabuf *ie, *buf;
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struct wpabuf *ie, *buf;
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size_t len, plen;
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size_t len, plen;
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if (global->p2p == NULL)
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return 0;
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wpa_printf(MSG_DEBUG, "WFD: Update WFD IE");
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wpa_printf(MSG_DEBUG, "WFD: Update WFD IE");
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if (!global->wifi_display) {
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if (!global->wifi_display) {
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