wifi_display: Add a utility function to set WFD subelements from IEs
This will be useful to update the WFD subelements from DBus. Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
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2 changed files with 56 additions and 0 deletions
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@ -266,6 +266,60 @@ int wifi_display_subelem_set(struct wpa_global *global, char *cmd)
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}
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int wifi_display_subelem_set_from_ies(struct wpa_global *global,
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struct wpabuf *ie)
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{
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int subelements[MAX_WFD_SUBELEMS] = {};
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const u8 *pos, *end;
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int len, subelem;
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struct wpabuf *e;
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wpa_printf(MSG_DEBUG, "WFD IEs set: %p - %lu",
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ie, ie ? (unsigned long) wpabuf_len(ie) : 0);
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if (ie == NULL || wpabuf_len(ie) < 6)
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return -1;
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pos = wpabuf_head(ie);
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end = pos + wpabuf_len(ie);
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while (end > pos) {
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if (pos + 3 > end)
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break;
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len = WPA_GET_BE16(pos + 1) + 3;
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wpa_printf(MSG_DEBUG, "WFD Sub-Element ID %d - len %d",
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*pos, len - 3);
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if (pos + len > end)
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break;
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subelem = *pos;
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if (subelem < MAX_WFD_SUBELEMS && subelements[subelem] == 0) {
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e = wpabuf_alloc_copy(pos, len);
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if (e == NULL)
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return -1;
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wpabuf_free(global->wfd_subelem[subelem]);
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global->wfd_subelem[subelem] = e;
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subelements[subelem] = 1;
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}
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pos += len;
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}
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for (subelem = 0; subelem < MAX_WFD_SUBELEMS; subelem++) {
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if (subelements[subelem] == 0) {
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wpabuf_free(global->wfd_subelem[subelem]);
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global->wfd_subelem[subelem] = NULL;
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}
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}
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return wifi_display_update_wfd_ie(global);
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}
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int wifi_display_subelem_get(struct wpa_global *global, char *cmd,
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char *buf, size_t buflen)
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{
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@ -15,6 +15,8 @@ void wifi_display_deinit(struct wpa_global *global);
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void wifi_display_enable(struct wpa_global *global, int enabled);
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struct wpabuf *wifi_display_get_wfd_ie(struct wpa_global *global);
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int wifi_display_subelem_set(struct wpa_global *global, char *cmd);
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int wifi_display_subelem_set_from_ies(struct wpa_global *global,
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struct wpabuf *ie);
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int wifi_display_subelem_get(struct wpa_global *global, char *cmd,
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char *buf, size_t buflen);
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char * wifi_display_subelem_hex(const struct wpabuf *wfd_subelems, u8 id);
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