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wifi_display: Add a utility function to set WFD subelements from IEs

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This will be useful to update the WFD subelements from DBus.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This commit is contained in:
Tomasz Bursztyka 2014-09-15 08:04:30 +03:00 committed by Jouni Malinen
parent d4177443d4
commit 4bd7e1614f
2 changed files with 56 additions and 0 deletions
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54
wpa_supplicant/wifi_display.c
View file

@ -266,6 +266,60 @@ int wifi_display_subelem_set(struct wpa_global *global, char *cmd)
}
int wifi_display_subelem_set_from_ies(struct wpa_global *global,
struct wpabuf *ie)
{
int subelements[MAX_WFD_SUBELEMS] = {};
const u8 *pos, *end;
int len, subelem;
struct wpabuf *e;
wpa_printf(MSG_DEBUG, "WFD IEs set: %p - %lu",
ie, ie ? (unsigned long) wpabuf_len(ie) : 0);
if (ie == NULL || wpabuf_len(ie) < 6)
return -1;
pos = wpabuf_head(ie);
end = pos + wpabuf_len(ie);
while (end > pos) {
if (pos + 3 > end)
break;
len = WPA_GET_BE16(pos + 1) + 3;
wpa_printf(MSG_DEBUG, "WFD Sub-Element ID %d - len %d",
*pos, len - 3);
if (pos + len > end)
break;
subelem = *pos;
if (subelem < MAX_WFD_SUBELEMS && subelements[subelem] == 0) {
e = wpabuf_alloc_copy(pos, len);
if (e == NULL)
return -1;
wpabuf_free(global->wfd_subelem[subelem]);
global->wfd_subelem[subelem] = e;
subelements[subelem] = 1;
}
pos += len;
}
for (subelem = 0; subelem < MAX_WFD_SUBELEMS; subelem++) {
if (subelements[subelem] == 0) {
wpabuf_free(global->wfd_subelem[subelem]);
global->wfd_subelem[subelem] = NULL;
}
}
return wifi_display_update_wfd_ie(global);
}
int wifi_display_subelem_get(struct wpa_global *global, char *cmd,
char *buf, size_t buflen)
{

2
wpa_supplicant/wifi_display.h
View file

@ -15,6 +15,8 @@ void wifi_display_deinit(struct wpa_global *global);
void wifi_display_enable(struct wpa_global *global, int enabled);
struct wpabuf *wifi_display_get_wfd_ie(struct wpa_global *global);
int wifi_display_subelem_set(struct wpa_global *global, char *cmd);
int wifi_display_subelem_set_from_ies(struct wpa_global *global,
struct wpabuf *ie);
int wifi_display_subelem_get(struct wpa_global *global, char *cmd,
char *buf, size_t buflen);
char * wifi_display_subelem_hex(const struct wpabuf *wfd_subelems, u8 id);