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Commit da290c54 authored by Jes Sorensen's avatar Jes Sorensen Committed by Greg Kroah-Hartman
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staging: rtl8723au: OnAssocReq23a(): Clean up and use more ieee80211.h 

This converts it to use struct ieee80211_mgmt and cfg80211_find_ie().
In addition fix a potential buffer overrun in the last loop searching
through list WLAN_EID_VENDOR_SPECIFIC elements.
Signed-off-by: default avatarJes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 858e6658
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Inline Side-by-side
Showing with 131 additions and 145 deletions
drivers/staging/rtl8723au/core/rtw_mlme_ext.c
View file @ da290c54
......@@ -1119,13 +1119,12 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
u16 capab_info, listen_interval;
struct rtw_ieee802_11_elems elems;
struct sta_info *pstat;
unsigned char reassoc, *p, *pos, *wpa_ie;
unsigned char reassoc, *wpa_ie;
unsigned char WMM_IE[] = {0x00, 0x50, 0xf2, 0x02, 0x00, 0x01};
int i, ie_len, wpa_ie_len, left;
int i, wpa_ie_len, left;
unsigned char supportRate[16];
int supportRateNum;
unsigned short status = WLAN_STATUS_SUCCESS;
unsigned short ie_offset;
struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
struct security_priv *psecuritypriv = &padapter->securitypriv;
struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;
......@@ -1133,61 +1132,56 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
struct wlan_bssid_ex *cur = &pmlmeinfo->network;
struct sta_priv *pstapriv = &padapter->stapriv;
struct sk_buff *skb = precv_frame->pkt;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) skb->data;
const u8 *p;
u8 *pos;
u8 *pframe = skb->data;
uint pkt_len = skb->len;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
u16 frame_control;
if ((pmlmeinfo->state&0x03) != WIFI_FW_AP_STATE)
if ((pmlmeinfo->state & 0x03) != WIFI_FW_AP_STATE)
return _FAIL;
frame_control = hdr->frame_control;
if (ieee80211_is_assoc_req(frame_control)) {
left = pkt_len - sizeof(struct ieee80211_hdr_3addr);
if (ieee80211_is_assoc_req(mgmt->frame_control)) {
reassoc = 0;
ie_offset = _ASOCREQ_IE_OFFSET_;
pos = mgmt->u.assoc_req.variable;
left -= _ASOCREQ_IE_OFFSET_;
} else { /* WIFI_REASSOCREQ */
reassoc = 1;
ie_offset = _REASOCREQ_IE_OFFSET_;
pos = mgmt->u.reassoc_req.variable;
left -= _REASOCREQ_IE_OFFSET_;
}
if (pkt_len < sizeof(struct ieee80211_hdr_3addr) + ie_offset) {
DBG_8723A("handle_assoc(reassoc =%d) - too short payload (len =%lu)"
"\n", reassoc, (unsigned long)pkt_len);
if (left < 0) {
DBG_8723A("handle_assoc(reassoc =%d) - too short payload "
"(len =%lu)\n", reassoc, (unsigned long)pkt_len);
return _FAIL;
}
pstat = rtw_get_stainfo23a(pstapriv, hdr->addr2);
pstat = rtw_get_stainfo23a(pstapriv, mgmt->sa);
if (!pstat) {
status = WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA;
goto asoc_class2_error;
}
capab_info = get_unaligned_le16(pframe + sizeof(struct ieee80211_hdr_3addr));
/* capab_info = le16_to_cpu(*(unsigned short *)(pframe + sizeof(struct ieee80211_hdr_3addr))); */
/* listen_interval = le16_to_cpu(*(unsigned short *)(pframe + sizeof(struct ieee80211_hdr_3addr)+2)); */
listen_interval = get_unaligned_le16(pframe + sizeof(struct ieee80211_hdr_3addr)+2);
left = pkt_len - (sizeof(struct ieee80211_hdr_3addr) + ie_offset);
pos = pframe + (sizeof(struct ieee80211_hdr_3addr) + ie_offset);
/* These two are located at the same offsets whether it's an
* assoc_req or a reassoc_req */
capab_info = get_unaligned_le16(&mgmt->u.assoc_req.capab_info);
listen_interval =
get_unaligned_le16(&mgmt->u.assoc_req.listen_interval);
DBG_8723A("%s\n", __func__);
/* check if this stat has been successfully authenticated/assocated */
if (!((pstat->state) & WIFI_FW_AUTH_SUCCESS))
{
if (!((pstat->state) & WIFI_FW_ASSOC_SUCCESS))
{
if (!(pstat->state & WIFI_FW_AUTH_SUCCESS)) {
if (!(pstat->state & WIFI_FW_ASSOC_SUCCESS)) {
status = WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA;
goto asoc_class2_error;
}
else
{
} else {
pstat->state &= (~WIFI_FW_ASSOC_SUCCESS);
pstat->state |= WIFI_FW_ASSOC_STATE;
}
}
else
{
} else {
pstat->state &= (~WIFI_FW_AUTH_SUCCESS);
pstat->state |= WIFI_FW_ASSOC_STATE;
}
......@@ -1195,8 +1189,8 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
pstat->capability = capab_info;
/* now parse all ieee802_11 ie to point to elems */
if (rtw_ieee802_11_parse_elems23a(pos, left, &elems, 1) == ParseFailed ||
!elems.ssid) {
if (rtw_ieee802_11_parse_elems23a(pos, left, &elems, 1) ==
ParseFailed || !elems.ssid) {
DBG_8723A("STA " MAC_FMT " sent invalid association request\n",
MAC_ARG(pstat->hwaddr));
status = WLAN_STATUS_UNSPECIFIED_FAILURE;
......@@ -1205,32 +1199,27 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
/* now we should check all the fields... */
/* checking SSID */
p = rtw_get_ie23a(pframe + sizeof(struct ieee80211_hdr_3addr) +
ie_offset, WLAN_EID_SSID, &ie_len, pkt_len -
sizeof(struct ieee80211_hdr_3addr) - ie_offset);
if (p == NULL)
{
status = WLAN_STATUS_UNSPECIFIED_FAILURE;
}
if (ie_len == 0) /* broadcast ssid, however it is not allowed in assocreq */
p = cfg80211_find_ie(WLAN_EID_SSID, pos, left);
if (!p || p[1] == 0) {
/* broadcast ssid, however it is not allowed in assocreq */
status = WLAN_STATUS_UNSPECIFIED_FAILURE;
else {
} else {
/* check if ssid match */
if (memcmp((void *)(p+2), cur->Ssid.ssid, cur->Ssid.ssid_len))
if (memcmp(p + 2, cur->Ssid.ssid, cur->Ssid.ssid_len))
status = WLAN_STATUS_UNSPECIFIED_FAILURE;
if (ie_len != cur->Ssid.ssid_len)
if (p[1] != cur->Ssid.ssid_len)
status = WLAN_STATUS_UNSPECIFIED_FAILURE;
}
if (WLAN_STATUS_SUCCESS != status)
if (status != WLAN_STATUS_SUCCESS)
goto OnAssocReq23aFail;
/* check if the supported rate is ok */
p = rtw_get_ie23a(pframe + sizeof(struct ieee80211_hdr_3addr) + ie_offset, WLAN_EID_SUPP_RATES, &ie_len, pkt_len - sizeof(struct ieee80211_hdr_3addr) - ie_offset);
if (p == NULL) {
DBG_8723A("Rx a sta assoc-req which supported rate is empty!\n");
p = cfg80211_find_ie(WLAN_EID_SUPP_RATES, pos, left);
if (!p) {
DBG_8723A("Rx a sta assoc-req which supported rate is "
"empty!\n");
/* use our own rate set as statoin used */
/* memcpy(supportRate, AP_BSSRATE, AP_BSSRATE_LEN); */
/* supportRateNum = AP_BSSRATE_LEN; */
......@@ -1238,17 +1227,14 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
status = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto OnAssocReq23aFail;
} else {
memcpy(supportRate, p+2, ie_len);
supportRateNum = ie_len;
memcpy(supportRate, p + 2, p[1]);
supportRateNum = p[1];
p = rtw_get_ie23a(pframe + sizeof(struct ieee80211_hdr_3addr) + ie_offset, WLAN_EID_EXT_SUPP_RATES, &ie_len,
pkt_len - sizeof(struct ieee80211_hdr_3addr) - ie_offset);
if (p != NULL) {
if (supportRateNum<= sizeof(supportRate))
{
memcpy(supportRate+supportRateNum, p+2, ie_len);
supportRateNum += ie_len;
p = cfg80211_find_ie(WLAN_EID_EXT_SUPP_RATES, pos, left);
if (!p) {
if (supportRateNum <= sizeof(supportRate)) {
memcpy(supportRate+supportRateNum, p + 2, p[1]);
supportRateNum += p[1];
}
}
}
......@@ -1269,42 +1255,46 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
pstat->wpa_pairwise_cipher = 0;
pstat->wpa2_pairwise_cipher = 0;
memset(pstat->wpa_ie, 0, sizeof(pstat->wpa_ie));
if ((psecuritypriv->wpa_psk & BIT(1)) && elems.rsn_ie) {
if (psecuritypriv->wpa_psk & BIT(1) && elems.rsn_ie) {
int group_cipher = 0, pairwise_cipher = 0;
wpa_ie = elems.rsn_ie;
wpa_ie_len = elems.rsn_ie_len;
if (rtw_parse_wpa2_ie23a(wpa_ie-2, wpa_ie_len+2, &group_cipher, &pairwise_cipher, NULL) == _SUCCESS) {
if (rtw_parse_wpa2_ie23a(wpa_ie - 2, wpa_ie_len + 2,
&group_cipher, &pairwise_cipher,
NULL) == _SUCCESS) {
pstat->dot8021xalg = 1;/* psk, todo:802.1x */
pstat->wpa_psk |= BIT(1);
pstat->wpa2_group_cipher = group_cipher&psecuritypriv->wpa2_group_cipher;
pstat->wpa2_pairwise_cipher = pairwise_cipher&psecuritypriv->wpa2_pairwise_cipher;
pstat->wpa2_group_cipher =
group_cipher&psecuritypriv->wpa2_group_cipher;
pstat->wpa2_pairwise_cipher =
pairwise_cipher&psecuritypriv->wpa2_pairwise_cipher;
if (!pstat->wpa2_group_cipher)
status = WLAN_REASON_INVALID_GROUP_CIPHER;
if (!pstat->wpa2_pairwise_cipher)
status = WLAN_REASON_INVALID_PAIRWISE_CIPHER;
} else {
} else
status = WLAN_STATUS_INVALID_IE;
}
} else if ((psecuritypriv->wpa_psk & BIT(0)) && elems.wpa_ie) {
} else if (psecuritypriv->wpa_psk & BIT(0) && elems.wpa_ie) {
int group_cipher = 0, pairwise_cipher = 0;
wpa_ie = elems.wpa_ie;
wpa_ie_len = elems.wpa_ie_len;
if (rtw_parse_wpa_ie23a(wpa_ie-2, wpa_ie_len+2, &group_cipher, &pairwise_cipher, NULL) == _SUCCESS) {
if (rtw_parse_wpa_ie23a(wpa_ie - 2, wpa_ie_len + 2,
&group_cipher, &pairwise_cipher,
NULL) == _SUCCESS) {
pstat->dot8021xalg = 1;/* psk, todo:802.1x */
pstat->wpa_psk |= BIT(0);
pstat->wpa_group_cipher = group_cipher&psecuritypriv->wpa_group_cipher;
pstat->wpa_pairwise_cipher = pairwise_cipher&psecuritypriv->wpa_pairwise_cipher;
pstat->wpa_group_cipher =
group_cipher&psecuritypriv->wpa_group_cipher;
pstat->wpa_pairwise_cipher =
pairwise_cipher&psecuritypriv->wpa_pairwise_cipher;
if (!pstat->wpa_group_cipher)
status = WLAN_STATUS_INVALID_GROUP_CIPHER;
......@@ -1312,10 +1302,8 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
if (!pstat->wpa_pairwise_cipher)
status = WLAN_STATUS_INVALID_PAIRWISE_CIPHER;
} else {
} else
status = WLAN_STATUS_INVALID_IE;
}
} else {
wpa_ie = NULL;
wpa_ie_len = 0;
......@@ -1325,34 +1313,37 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
goto OnAssocReq23aFail;
pstat->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
if (wpa_ie == NULL) {
if (!wpa_ie) {
if (elems.wps_ie) {
DBG_8723A("STA included WPS IE in "
"(Re)Association Request - assume WPS is "
"used\n");
DBG_8723A("STA included WPS IE in (Re)Association "
"Request - assume WPS is used\n");
pstat->flags |= WLAN_STA_WPS;
} else {
DBG_8723A("STA did not include WPA/RSN IE "
"in (Re)Association Request - possible WPS "
"use\n");
DBG_8723A("STA did not include WPA/RSN IE in (Re)"
"Association Request - possible WPS use\n");
pstat->flags |= WLAN_STA_MAYBE_WPS;
}
/* AP support WPA/RSN, and sta is going to do WPS, but AP is not ready */
/* AP support WPA/RSN, and sta is going to do WPS, but AP
is not ready */
/* that the selected registrar of AP is _FLASE */
if ((psecuritypriv->wpa_psk > 0) &&
(pstat->flags & (WLAN_STA_WPS|WLAN_STA_MAYBE_WPS))) {
if (psecuritypriv->wpa_psk > 0 &&
pstat->flags & (WLAN_STA_WPS|WLAN_STA_MAYBE_WPS)) {
if (pmlmepriv->wps_beacon_ie) {
u8 selected_registrar = 0;
rtw_get_wps_attr_content23a(pmlmepriv->wps_beacon_ie, pmlmepriv->wps_beacon_ie_len,
WPS_ATTR_SELECTED_REGISTRAR, &selected_registrar, NULL);
rtw_get_wps_attr_content23a(
pmlmepriv->wps_beacon_ie,
pmlmepriv->wps_beacon_ie_len,
WPS_ATTR_SELECTED_REGISTRAR,
&selected_registrar, NULL);
if (!selected_registrar) {
DBG_8723A("selected_registrar is false , or AP is not ready to do WPS\n");
DBG_8723A("selected_registrar is false,"
"or AP is not ready to do "
"WPS\n");
status = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
goto OnAssocReq23aFail;
}
}
......@@ -1362,7 +1353,8 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
if (psecuritypriv->wpa_psk == 0) {
DBG_8723A("STA " MAC_FMT ": WPA/RSN IE in association "
"request, but AP don't support WPA/RSN\n", MAC_ARG(pstat->hwaddr));
"request, but AP don't support WPA/RSN\n",
MAC_ARG(pstat->hwaddr));
status = WLAN_STATUS_INVALID_IE;
......@@ -1376,11 +1368,12 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
pstat->flags |= WLAN_STA_WPS;
copy_len = 0;
} else {
copy_len = ((wpa_ie_len+2) > sizeof(pstat->wpa_ie)) ? (sizeof(pstat->wpa_ie)):(wpa_ie_len+2);
copy_len = ((wpa_ie_len + 2) > sizeof(pstat->wpa_ie)) ?
sizeof(pstat->wpa_ie) : (wpa_ie_len + 2);
}
if (copy_len>0)
memcpy(pstat->wpa_ie, wpa_ie-2, copy_len);
if (copy_len > 0)
memcpy(pstat->wpa_ie, wpa_ie - 2, copy_len);
}
......@@ -1393,48 +1386,45 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
pstat->uapsd_vi = 0;
pstat->uapsd_be = 0;
pstat->uapsd_bk = 0;
if (pmlmepriv->qospriv.qos_option)
{
p = pframe + sizeof(struct ieee80211_hdr_3addr) + ie_offset; ie_len = 0;
for (;;)
{
p = rtw_get_ie23a(p, WLAN_EID_VENDOR_SPECIFIC, &ie_len,
pkt_len -
sizeof(struct ieee80211_hdr_3addr) -
ie_offset);
if (p != NULL) {
if (!memcmp(p+2, WMM_IE, 6)) {
if (pmlmepriv->qospriv.qos_option) {
u8 *end = pos + left;
p = pos;
for (;;) {
left = end - p;
p = cfg80211_find_ie(WLAN_EID_VENDOR_SPECIFIC, p, left);
if (p) {
if (!memcmp(p + 2, WMM_IE, 6)) {
pstat->flags |= WLAN_STA_WME;
pstat->qos_option = 1;
pstat->qos_info = *(p+8);
pstat->qos_info = *(p + 8);
pstat->max_sp_len = (pstat->qos_info>>5)&0x3;
pstat->max_sp_len =
(pstat->qos_info >> 5) & 0x3;
if ((pstat->qos_info&0xf) != 0xf)
if ((pstat->qos_info & 0xf) != 0xf)
pstat->has_legacy_ac = true;
else
pstat->has_legacy_ac = false;
if (pstat->qos_info&0xf)
{
if (pstat->qos_info&BIT(0))
if (pstat->qos_info & 0xf) {
if (pstat->qos_info & BIT(0))
pstat->uapsd_vo = BIT(0)|BIT(1);
else
pstat->uapsd_vo = 0;
if (pstat->qos_info&BIT(1))
if (pstat->qos_info & BIT(1))
pstat->uapsd_vi = BIT(0)|BIT(1);
else
pstat->uapsd_vi = 0;
if (pstat->qos_info&BIT(2))
if (pstat->qos_info & BIT(2))
pstat->uapsd_bk = BIT(0)|BIT(1);
else
pstat->uapsd_bk = 0;
if (pstat->qos_info&BIT(3))
if (pstat->qos_info & BIT(3))
pstat->uapsd_be = BIT(0)|BIT(1);
else
pstat->uapsd_be = 0;
......@@ -1443,45 +1433,41 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
break;
}
}
else {
} else {
break;
}
p = p + ie_len + 2;
p = p + p[1] + 2;
}
}
/* save HT capabilities in the sta object */
memset(&pstat->htpriv.ht_cap, 0, sizeof(struct ieee80211_ht_cap));
if (elems.ht_capabilities && elems.ht_capabilities_len >= sizeof(struct ieee80211_ht_cap))
{
if (elems.ht_capabilities && elems.ht_capabilities_len >=
sizeof(struct ieee80211_ht_cap)) {
pstat->flags |= WLAN_STA_HT;
pstat->flags |= WLAN_STA_WME;
memcpy(&pstat->htpriv.ht_cap, elems.ht_capabilities, sizeof(struct ieee80211_ht_cap));
memcpy(&pstat->htpriv.ht_cap, elems.ht_capabilities,
sizeof(struct ieee80211_ht_cap));
} else
pstat->flags &= ~WLAN_STA_HT;
if ((pmlmepriv->htpriv.ht_option == false) && (pstat->flags&WLAN_STA_HT))
{
if (pmlmepriv->htpriv.ht_option == false && pstat->flags & WLAN_STA_HT){
status = WLAN_STATUS_UNSPECIFIED_FAILURE;
goto OnAssocReq23aFail;
}
if ((pstat->flags & WLAN_STA_HT) &&
((pstat->wpa2_pairwise_cipher&WPA_CIPHER_TKIP) ||
(pstat->wpa_pairwise_cipher&WPA_CIPHER_TKIP)))
{
DBG_8723A("HT: " MAC_FMT " tried to "
"use TKIP with HT association\n", MAC_ARG(pstat->hwaddr));
if (pstat->flags & WLAN_STA_HT &&
(pstat->wpa2_pairwise_cipher & WPA_CIPHER_TKIP ||
pstat->wpa_pairwise_cipher & WPA_CIPHER_TKIP)) {
DBG_8723A("HT: " MAC_FMT " tried to use TKIP with HT "
"association\n", MAC_ARG(pstat->hwaddr));
/* status = WLAN_STATUS_CIPHER_REJECTED_PER_POLICY; */
/* goto OnAssocReq23aFail; */
}
/* */
pstat->flags |= WLAN_STA_NONERP;
for (i = 0; i < pstat->bssratelen; i++) {
if ((pstat->bssrateset[i] & 0x7f) > 22) {
......@@ -1523,14 +1509,13 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
status = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
goto OnAssocReq23aFail;
} else {
pstapriv->sta_aid[pstat->aid - 1] = pstat;
DBG_8723A("allocate new AID = (%d)\n", pstat->aid);
}
}
pstat->state &= (~WIFI_FW_ASSOC_STATE);
pstat->state &= ~WIFI_FW_ASSOC_STATE;
pstat->state |= WIFI_FW_ASSOC_SUCCESS;
spin_lock_bh(&pstapriv->auth_list_lock);
......@@ -1549,18 +1534,20 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
spin_unlock_bh(&pstapriv->asoc_list_lock);
/* now the station is qualified to join our BSS... */
if (pstat && (pstat->state & WIFI_FW_ASSOC_SUCCESS) &&
(WLAN_STATUS_SUCCESS == status)) {
if (pstat && pstat->state & WIFI_FW_ASSOC_SUCCESS &&
status == WLAN_STATUS_SUCCESS) {
#ifdef CONFIG_8723AU_AP_MODE
/* 1 bss_cap_update & sta_info_update23a */
bss_cap_update_on_sta_join23a(padapter, pstat);
sta_info_update23a(padapter, pstat);
/* issue assoc rsp before notify station join event. */
if (ieee80211_is_assoc_req(frame_control))
issue_asocrsp23a(padapter, status, pstat, WIFI_ASSOCRSP);
if (ieee80211_is_assoc_req(mgmt->frame_control))
issue_asocrsp23a(padapter, status, pstat,
WIFI_ASSOCRSP);
else
issue_asocrsp23a(padapter, status, pstat, WIFI_REASSOCRSP);
issue_asocrsp23a(padapter, status, pstat,
WIFI_REASSOCRSP);
/* 2 - report to upper layer */
DBG_8723A("indicate_sta_join_event to upper layer - hostapd\n");
......@@ -1576,16 +1563,15 @@ unsigned int OnAssocReq23a(struct rtw_adapter *padapter, struct recv_frame *prec
asoc_class2_error:
#ifdef CONFIG_8723AU_AP_MODE
issue_deauth23a(padapter, hdr->addr2, status);
issue_deauth23a(padapter, mgmt->sa, status);
#endif
return _FAIL;
OnAssocReq23aFail:
#ifdef CONFIG_8723AU_AP_MODE
pstat->aid = 0;
if (ieee80211_is_assoc_req(frame_control))
if (ieee80211_is_assoc_req(mgmt->frame_control))
issue_asocrsp23a(padapter, status, pstat, WIFI_ASSOCRSP);
else
issue_asocrsp23a(padapter, status, pstat, WIFI_REASSOCRSP);
......
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