[PATCH usteer v2 3/3] According to IEEE specs added a countdown before kicking the station

[Nils Hendrik Rottgardt]

- Disaccociation Timer will run a countdown before disaccociate the station
- Supporting multiple transisiton requests if validity period of neighbors is 
over

Signed-off-by: Nils Hendrik Rottgardt <n.rottga...@gmail.com>
---
 band_steering.c | 20 ++++++++++----------
 policy.c        |  6 +++++-
 usteer.h        |  1 +
 3 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/band_steering.c b/band_steering.c
index d680d02..ef92443 100644
--- a/band_steering.c
+++ b/band_steering.c
@@ -96,16 +96,16 @@ void usteer_band_steering_perform_steer(struct 
usteer_local_node *ln)
                }
 
                if (si->bss_transition) {
-                       if (!si->kick_time && si->sta->aggressive) {
-                               si->kick_time = current_time + 
config.roam_kick_delay;
-                               validity_period = 10000 / 
usteer_local_node_get_beacon_interval(ln); /* ~ 10 seconds */
-                               disassoc_timer = (si->kick_time - current_time) 
/ usteer_local_node_get_beacon_interval(ln);
-
-                               if (si->sta->aggressive)
-                                       usteer_ubus_band_steering_request(si, 
0, true, disassoc_timer, true, validity_period);
-                               else
-                                       usteer_ubus_band_steering_request(si, 
0, false, 0, true, validity_period);
-                       }
+                       validity_period = 10000 / 
usteer_local_node_get_beacon_interval(ln); /* ~ 10 seconds */
+                       if (si->sta->aggressive) {
+                               if (!si->kick_time)     {
+                                               si->kick_time = current_time + 
config.roam_kick_delay;
+                                               
si->roam_transition_request_validity_end = current_time + 10000;                
                                
+                                               disassoc_timer = (si->kick_time 
- current_time) / usteer_local_node_get_beacon_interval(ln);
+                                               
usteer_ubus_band_steering_request(si, 0, true, disassoc_timer, true, 
validity_period);
+                               } 
+                       } else
+                               usteer_ubus_band_steering_request(si, 0, false, 
0, true, validity_period);
                }
 
                si->band_steering.below_snr = false;
diff --git a/policy.c b/policy.c
index b3af22b..0d9b87b 100644
--- a/policy.c
+++ b/policy.c
@@ -375,7 +375,7 @@ usteer_roam_trigger_sm(struct usteer_local_node *ln, struct 
sta_info *si)
 
                if (!si->kick_time && si->sta->aggressive)
                        si->kick_time = current_time + config.roam_kick_delay;
-
+               si->roam_transition_request_validity_end = current_time + 10000;
                validity_period = 10000 / 
usteer_local_node_get_beacon_interval(ln); /* ~ 10 seconds */
                if (si->sta->aggressive) {
                        disassoc_timer = (si->kick_time - current_time) / 
usteer_local_node_get_beacon_interval(ln);
@@ -401,6 +401,10 @@ bool usteer_policy_can_perform_roam(struct sta_info *si)
        if (si->kick_time && si->kick_time <= current_time)
                return false;
 
+       /* Skip if in validity period */
+       if (current_time < si->roam_transition_request_validity_end)
+               return false;
+
        /* Skip on rejected transition */
        if (si->bss_transition_response.status_code && current_time - 
si->bss_transition_response.timestamp < config.steer_reject_timeout)
                return false;
diff --git a/usteer.h b/usteer.h
index 7a399db..ec6e251 100644
--- a/usteer.h
+++ b/usteer.h
@@ -258,6 +258,7 @@ struct sta_info {
        enum roam_trigger_state roam_state;
        uint8_t roam_tries;
        uint64_t roam_event;
+       uint64_t roam_transition_request_validity_end;
        uint64_t roam_kick;
        uint64_t roam_scan_start;
        uint64_t roam_scan_timeout_start;
-- 
2.39.5


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