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station: start FT-over-DS actions after roaming

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Once roamed IWD never sent out any FT Request frames. This prevented
FT-over-DS from being used after an initial roam.
This commit is contained in:
James Prestwood 2021-09-28 14:27:37 -07:00 committed by Denis Kenzior
parent d68c9e69fa
commit 7e9708ddbc
1 changed files with 74 additions and 75 deletions
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149
src/station.c
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@ -1729,6 +1729,77 @@ static void station_early_neighbor_report_cb(struct netdev *netdev, int err,
&station->roam_freqs);
}
static bool station_can_fast_transition(struct handshake_state *hs,
struct scan_bss *bss)
{
uint16_t mdid;
if (!hs->mde)
return false;
if (ie_parse_mobility_domain_from_data(hs->mde, hs->mde[1] + 2,
&mdid, NULL, NULL) < 0)
return false;
if (!(bss->mde_present && l_get_le16(bss->mde) == mdid))
return false;
if (hs->supplicant_ie != NULL) {
struct ie_rsn_info rsn_info;
if (!IE_AKM_IS_FT(hs->akm_suite))
return false;
if (scan_bss_get_rsn_info(bss, &rsn_info) < 0)
return false;
if (!IE_AKM_IS_FT(rsn_info.akm_suites))
return false;
}
return true;
}
static void station_ft_ds_action_start(struct station *station)
{
struct handshake_state *hs = netdev_get_handshake(station->netdev);
uint16_t mdid;
const struct l_queue_entry *entry;
struct scan_bss *bss;
struct ie_rsn_info rsn_info;
if (!station_can_fast_transition(hs, station->connected_bss) ||
!(hs->mde[4] & 1))
return;
if (ie_parse_mobility_domain_from_data(hs->mde, hs->mde[1] + 2,
&mdid, NULL, NULL) < 0)
return;
for (entry = network_bss_list_get_entries(station->connected_network);
entry; entry = entry->next) {
bss = entry->data;
if (bss == station->connected_bss)
continue;
if (mdid != l_get_le16(bss->mde))
continue;
if (scan_bss_get_rsn_info(bss, &rsn_info) < 0)
continue;
if (!IE_AKM_IS_FT(rsn_info.akm_suites))
continue;
/*
* Fire and forget. Netdev will maintain a cache of responses and
* when the time comes these can be referenced for a roam
*/
netdev_fast_transition_over_ds_action(station->netdev, bss);
}
}
static void station_roamed(struct station *station)
{
station->roam_scan_full = false;
@ -1754,6 +1825,8 @@ static void station_roamed(struct station *station)
l_warn("Could not request neighbor report");
}
station_ft_ds_action_start(station);
station_enter_state(station, STATION_STATE_CONNECTED);
}
@ -1957,37 +2030,6 @@ static void station_preauthenticate_cb(struct netdev *netdev,
station_transition_reassociate(station, bss, new_hs);
}
static bool station_can_fast_transition(struct handshake_state *hs,
struct scan_bss *bss)
{
uint16_t mdid;
if (!hs->mde)
return false;
if (ie_parse_mobility_domain_from_data(hs->mde, hs->mde[1] + 2,
&mdid, NULL, NULL) < 0)
return false;
if (!(bss->mde_present && l_get_le16(bss->mde) == mdid))
return false;
if (hs->supplicant_ie != NULL) {
struct ie_rsn_info rsn_info;
if (!IE_AKM_IS_FT(hs->akm_suite))
return false;
if (scan_bss_get_rsn_info(bss, &rsn_info) < 0)
return false;
if (!IE_AKM_IS_FT(rsn_info.akm_suites))
return false;
}
return true;
}
static void station_transition_start(struct station *station,
struct scan_bss *bss)
{
@ -2624,36 +2666,6 @@ static bool station_retry_with_status(struct station *station,
return station_try_next_bss(station);
}
static void station_ft_ds_action_start(struct station *station, uint16_t mdid)
{
const struct l_queue_entry *entry;
struct scan_bss *bss;
struct ie_rsn_info rsn_info;
for (entry = network_bss_list_get_entries(station->connected_network);
entry; entry = entry->next) {
bss = entry->data;
if (bss == station->connected_bss)
continue;
if (mdid != l_get_le16(bss->mde))
continue;
if (scan_bss_get_rsn_info(bss, &rsn_info) < 0)
continue;
if (!IE_AKM_IS_FT(rsn_info.akm_suites))
continue;
/*
* Fire and forget. Netdev will maintain a cache of responses and
* when the time comes these can be referenced for a roam
*/
netdev_fast_transition_over_ds_action(station->netdev, bss);
}
}
static void station_connect_ok(struct station *station)
{
struct handshake_state *hs = netdev_get_handshake(station->netdev);
@ -2677,20 +2689,7 @@ static void station_connect_ok(struct station *station)
l_warn("Could not request neighbor report");
}
/*
* If this network supports FT-over-DS send initial action frames now
* to prepare for future roams.
*/
if (station_can_fast_transition(hs, station->connected_bss) &&
(hs->mde[4] & 1)) {
uint16_t mdid;
if (ie_parse_mobility_domain_from_data(hs->mde, hs->mde[1] + 2,
&mdid, NULL, NULL) < 0)
return;
station_ft_ds_action_start(station, mdid);
}
station_ft_ds_action_start(station);
network_connected(station->connected_network);