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implement station inactivity timeout

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After the max station inactivity has expired, a probe request
(a data null frame) is sent to the station. It the station does
not ACK this frame, it is removed from the WTP.

Note: inactivity timeout is not the same as the CAPWAP Idle Timeout.
The CAPWAP Idle Timeout would remove a station due to inactivity
even when it is still reachable from the WTP. In contrast, the
inactivity timeout probes whether the station is still present
and only removes it when not.
This commit is contained in:
Andreas Schultz
2016-04-07 15:15:50 +02:00
parent bca5c91ae1
commit 813f24b8ac
9 changed files with 432 additions and 38 deletions
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24
src/common/binding/ieee80211/ieee80211.c
View File

@ -764,3 +764,27 @@ int ieee80211_create_deauthentication(uint8_t* buffer, int length, struct ieee80
return (int)((uint8_t*)&header->deauthetication.ie[0] - (uint8_t*)header);
}
/* */
int ieee80211_create_disassociation(uint8_t* buffer, int length,
struct ieee80211_disassociation_params* params)
{
struct ieee80211_header_mgmt* header;
ASSERT(buffer != NULL);
/* */
header = (struct ieee80211_header_mgmt*)buffer;
/* Management header frame */
header->framecontrol = IEEE80211_FRAME_CONTROL(IEEE80211_FRAMECONTROL_TYPE_MGMT,
IEEE80211_FRAMECONTROL_MGMT_SUBTYPE_DISASSOCIATION);
header->durationid = __cpu_to_le16(0);
memcpy(header->da, params->station, ETH_ALEN);
memcpy(header->sa, params->bssid, ETH_ALEN);
memcpy(header->bssid, params->bssid, ETH_ALEN);
header->sequencecontrol = __cpu_to_le16(0);
header->disassociation.reasoncode = __cpu_to_le16(params->reasoncode);
return (int)((uint8_t*)&header->disassociation.ie[0] - (uint8_t*)header);
}

10
src/common/binding/ieee80211/ieee80211.h
View File

@ -697,6 +697,16 @@ struct ieee80211_deauthentication_params {
int ieee80211_create_deauthentication(uint8_t* buffer, int length, struct ieee80211_deauthentication_params* params);
/* Management Disassociation */
struct ieee80211_disassociation_params {
uint8_t bssid[ETH_ALEN];
uint8_t station[ETH_ALEN];
uint16_t reasoncode;
};
int ieee80211_create_disassociation(uint8_t* buffer, int length, struct ieee80211_disassociation_params* params);
/* Utils */
int ieee80211_retrieve_information_elements_position(struct ieee80211_ie_items* items, const uint8_t* data, int length);
unsigned long ieee80211_frequency_to_channel(uint32_t freq);