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nl80211: Fetch assoc_freq from scan table for connect event 

When kernel-based SME is used, use the scan table to find a BSS entry
for the associated AP when processing connected event.
This commit is contained in:
Jouni Malinen 2011-05-16 18:35:42 +03:00 committed by Jouni Malinen
parent 0725cc7b7e
commit f5a8d42229
1 changed files with 56 additions and 5 deletions
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61
src/drivers/driver_nl80211.c
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@ -220,6 +220,15 @@ static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv);
struct nl80211_bss_info_arg {
struct wpa_driver_nl80211_data *drv;
struct wpa_scan_results *res;
unsigned int assoc_freq;
};
static int bss_info_handler(struct nl_msg *msg, void *arg);
/* nl80211 code */
static int ack_handler(struct nl_msg *msg, void *arg)
{
@ -589,6 +598,38 @@ static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
}
static unsigned int nl80211_get_assoc_freq(struct wpa_driver_nl80211_data *drv)
{
struct nl_msg *msg;
int ret;
struct nl80211_bss_info_arg arg;
os_memset(&arg, 0, sizeof(arg));
msg = nlmsg_alloc();
if (!msg)
goto nla_put_failure;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
NL80211_CMD_GET_SCAN, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
arg.drv = drv;
ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
msg = NULL;
if (ret == 0) {
wpa_printf(MSG_DEBUG, "nl80211: Operating frequency for the "
"associated BSS from scan results: %u MHz",
arg.assoc_freq);
return arg.assoc_freq ? arg.assoc_freq : drv->assoc_freq;
}
wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
"(%s)", ret, strerror(-ret));
nla_put_failure:
nlmsg_free(msg);
return drv->assoc_freq;
}
static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
const u8 *frame, size_t len)
{
@ -679,6 +720,8 @@ static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
event.assoc_info.resp_ies_len = nla_len(resp_ie);
}
event.assoc_info.freq = nl80211_get_assoc_freq(drv);
wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
}
@ -2347,11 +2390,6 @@ static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
}
struct nl80211_bss_info_arg {
struct wpa_driver_nl80211_data *drv;
struct wpa_scan_results *res;
};
static int bss_info_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
@ -2385,6 +2423,19 @@ static int bss_info_handler(struct nl_msg *msg, void *arg)
if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
bss_policy))
return NL_SKIP;
if (bss[NL80211_BSS_STATUS]) {
enum nl80211_bss_status status;
status = nla_get_u32(bss[NL80211_BSS_STATUS]);
if (status == NL80211_BSS_STATUS_ASSOCIATED &&
bss[NL80211_BSS_FREQUENCY]) {
_arg->assoc_freq =
nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
wpa_printf(MSG_DEBUG, "nl80211: Associated on %u MHz",
_arg->assoc_freq);
}
}
if (!res)
return NL_SKIP;
if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);