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HS 2.0R2: Fix bandwidth policy BSS selection

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Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2013-08-17 16:04:34 -07:00 committed by Jouni Malinen
parent 28f2a7c407
commit 8b4b9fb384
1 changed files with 72 additions and 24 deletions
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68
wpa_supplicant/interworking.c
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@ -1486,6 +1486,10 @@ static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
return -1;
}
wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR
" for connection (allow_excluded=%d)",
MAC2STR(bss->bssid), allow_excluded);
if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) {
/*
* We currently support only HS 2.0 networks and those are
@ -1525,6 +1529,7 @@ static int interworking_connect_helper(struct wpa_supplicant *wpa_s,
}
if (!cred_rc && !cred && !cred_3gpp) {
wpa_printf(MSG_DEBUG, "Interworking: No full credential matches - consider options without BW(etc.) limits");
cred_rc = interworking_credentials_available_roaming_consortium(
wpa_s, bss, 1, excl);
if (cred_rc) {
@ -2138,6 +2143,7 @@ static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
{
struct wpa_bss *bss;
u8 best_prio, prio;
struct wpa_cred *cred2;
/*
* Check if any other BSS is operated by a more preferred roaming
@ -2149,18 +2155,27 @@ static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
if (bss == selected)
continue;
cred = interworking_credentials_available(wpa_s, bss, NULL);
if (!cred)
cred2 = interworking_credentials_available(wpa_s, bss, NULL);
if (!cred2)
continue;
if (!wpa_bss_get_ie(bss, WLAN_EID_RSN))
continue;
prio = roaming_prio(wpa_s, cred, bss);
prio = roaming_prio(wpa_s, cred2, bss);
if (prio < best_prio) {
int bh1, bh2, load1, load2, conn1, conn2;
bh1 = cred_below_min_backhaul(wpa_s, cred, selected);
load1 = cred_over_max_bss_load(wpa_s, cred, selected);
conn1 = cred_conn_capab_missing(wpa_s, cred, selected);
bh2 = cred_below_min_backhaul(wpa_s, cred2, bss);
load2 = cred_over_max_bss_load(wpa_s, cred2, bss);
conn2 = cred_conn_capab_missing(wpa_s, cred2, bss);
if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) {
wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid));
best_prio = prio;
selected = bss;
}
}
}
return selected;
}
@ -2169,17 +2184,22 @@ static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s,
static void interworking_select_network(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
struct wpa_bss *selected2 = NULL, *selected2_home = NULL;
int selected_prio = -999999, selected_home_prio = -999999;
int selected2_prio = -999999, selected2_home_prio = -999999;
unsigned int count = 0;
const char *type;
int res;
struct wpa_cred *cred, *selected_cred = NULL;
struct wpa_cred *selected_home_cred = NULL;
struct wpa_cred *selected2_cred = NULL;
struct wpa_cred *selected2_home_cred = NULL;
wpa_s->network_select = 0;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
int excluded = 0;
int bh, bss_load, conn_capab;
cred = interworking_credentials_available(wpa_s, bss,
&excluded);
if (!cred)
@ -2204,20 +2224,35 @@ static void interworking_select_network(struct wpa_supplicant *wpa_s)
type = "roaming";
else
type = "unknown";
bh = cred_below_min_backhaul(wpa_s, cred, bss);
bss_load = cred_over_max_bss_load(wpa_s, cred, bss);
conn_capab = cred_conn_capab_missing(wpa_s, cred, bss);
wpa_msg(wpa_s, MSG_INFO, "%s" MACSTR " type=%s%s%s%s",
excluded ? INTERWORKING_BLACKLISTED : INTERWORKING_AP,
MAC2STR(bss->bssid), type,
cred_below_min_backhaul(wpa_s, cred, bss) ?
" below_min_backhaul=1" : "",
cred_over_max_bss_load(wpa_s, cred, bss) ?
" over_max_bss_load=1" : "",
cred_conn_capab_missing(wpa_s, cred, bss) ?
" conn_capab_missing=1" : "");
bh ? " below_min_backhaul=1" : "",
bss_load ? " over_max_bss_load=1" : "",
conn_capab ? " conn_capab_missing=1" : "");
if (excluded)
continue;
if (wpa_s->auto_select ||
(wpa_s->conf->auto_interworking &&
wpa_s->auto_network_select)) {
if (bh || bss_load || conn_capab) {
if (selected2 == NULL ||
cred->priority > selected2_prio) {
selected2 = bss;
selected2_prio = cred->priority;
selected2_cred = cred;
}
if (res > 0 &&
(selected2_home == NULL ||
cred->priority > selected2_home_prio)) {
selected2_home = bss;
selected2_home_prio = cred->priority;
selected2_home_cred = cred;
}
} else {
if (selected == NULL ||
cred->priority > selected_prio) {
selected = bss;
@ -2233,6 +2268,7 @@ static void interworking_select_network(struct wpa_supplicant *wpa_s)
}
}
}
}
if (selected_home && selected_home != selected &&
selected_home_prio >= selected_prio) {
@ -2241,6 +2277,18 @@ static void interworking_select_network(struct wpa_supplicant *wpa_s)
selected_cred = selected_home_cred;
}
if (!selected) {
if (selected2_home) {
wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected");
selected = selected2_home;
selected_cred = selected2_home_cred;
} else if (selected2) {
wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected");
selected = selected2;
selected_cred = selected2_cred;
}
}
if (count == 0) {
/*
* No matching network was found based on configured