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Interworking: Share ANQP data within homogenous ESS

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If two BSS entries have the same HESSID and SSID, share the fetched ANQP
information between these BSS entries to save memory and GAS/ANQP
operations.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2012-09-04 17:22:42 +03:00 committed by Jouni Malinen
parent c739d7e968
commit 53c9fc1df6
1 changed files with 38 additions and 0 deletions
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38
wpa_supplicant/interworking.c
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@ -1590,6 +1590,38 @@ static void interworking_select_network(struct wpa_supplicant *wpa_s)
}
static struct wpa_bss_anqp *
interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
struct wpa_bss *other;
if (is_zero_ether_addr(bss->hessid))
return NULL; /* Cannot be in the same homegenous ESS */
dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) {
if (other == bss)
continue;
if (other->anqp == NULL)
continue;
if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
continue;
if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)
continue;
if (bss->ssid_len != other->ssid_len ||
os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0)
continue;
wpa_printf(MSG_DEBUG, "Interworking: Share ANQP data with "
"already fetched BSSID " MACSTR " and " MACSTR,
MAC2STR(other->bssid), MAC2STR(bss->bssid));
other->anqp->users++;
return other->anqp;
}
return NULL;
}
static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
@ -1608,6 +1640,12 @@ static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
if (bss->anqp == NULL) {
bss->anqp = interworking_match_anqp_info(wpa_s,
bss);
if (bss->anqp) {
/* Shared data already fetched */
continue;
}
bss->anqp = wpa_bss_anqp_alloc();
if (bss->anqp == NULL)
break;