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staging:r8188eu: move IV/ICV trimming into decrypt() and also place it after rtl88eu_mon_recv_hook()

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IV/ICV should be trimmed immediately after decoding
(this is a decryptor job).

Trim IV/ICV inside decrypt() for SW decrypted frames,
for HW decrypted - before rtl88eu_mon_recv_hook().

Adopt frames receive process to work without IV/ICV fields.

Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ivan Safonov 2017-05-02 09:01:39 +03:00 committed by Greg Kroah-Hartman
parent 1d6c26224b
commit 2ba8444c97
1 changed files with 30 additions and 50 deletions
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80
drivers/staging/rtl8188eu/core/rtw_recv.c
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@ -259,12 +259,10 @@ static int recvframe_chkmic(struct adapter *adapter,
}
/* icv_len included the mic code */
datalen = precvframe->pkt->len-prxattrib->hdrlen -
prxattrib->iv_len-prxattrib->icv_len-8;
datalen = precvframe->pkt->len-prxattrib->hdrlen - 8;
pframe = precvframe->pkt->data;
payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;
payload = pframe+prxattrib->hdrlen;
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
(unsigned char)prxattrib->priority); /* care the length of the data */
@ -409,9 +407,15 @@ static struct recv_frame *decryptor(struct adapter *padapter,
default:
break;
}
if (res != _FAIL) {
memmove(precv_frame->pkt->data + precv_frame->attrib.iv_len, precv_frame->pkt->data, precv_frame->attrib.hdrlen);
skb_pull(precv_frame->pkt, precv_frame->attrib.iv_len);
skb_trim(precv_frame->pkt, precv_frame->pkt->len - precv_frame->attrib.icv_len);
}
} else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
(psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
psecuritypriv->hw_decrypted = true;
(psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_)) {
psecuritypriv->hw_decrypted = true;
}
if (res == _FAIL) {
rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
@ -452,7 +456,7 @@ static struct recv_frame *portctrl(struct adapter *adapter,
if (auth_alg == 2) {
/* get ether_type */
ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE + pfhdr->attrib.iv_len;
ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
memcpy(&be_tmp, ptr, 2);
ether_type = ntohs(be_tmp);
@ -1263,6 +1267,13 @@ static int validate_recv_frame(struct adapter *adapter,
*/
rtl88eu_mon_recv_hook(adapter->pmondev, precv_frame);
if (precv_frame->attrib.bdecrypted == 1 && precv_frame->attrib.encrypt > 0 &&
(adapter->securitypriv.busetkipkey == 1 || precv_frame->attrib.encrypt != _TKIP_)) {
memmove(precv_frame->pkt->data + precv_frame->attrib.iv_len, precv_frame->pkt->data, precv_frame->attrib.hdrlen);
skb_pull(precv_frame->pkt, precv_frame->attrib.iv_len);
skb_trim(precv_frame->pkt, precv_frame->pkt->len - precv_frame->attrib.icv_len);
}
exit:
return retval;
@ -1282,11 +1293,8 @@ static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
u8 *ptr = precvframe->pkt->data;
struct rx_pkt_attrib *pattrib = &precvframe->attrib;
if (pattrib->encrypt)
skb_trim(precvframe->pkt, precvframe->pkt->len - pattrib->icv_len);
psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen);
psnap_type = ptr+pattrib->hdrlen + SNAP_SIZE;
/* convert hdr + possible LLC headers into Ethernet header */
if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
(!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
@ -1299,12 +1307,9 @@ static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
bsnaphdr = false;
}
rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
rmv_len = pattrib->hdrlen + (bsnaphdr ? SNAP_SIZE : 0);
len = precvframe->pkt->len - rmv_len;
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
("\n===pattrib->hdrlen: %x, pattrib->iv_len:%x===\n\n", pattrib->hdrlen, pattrib->iv_len));
memcpy(&be_tmp, ptr+rmv_len, 2);
eth_type = ntohs(be_tmp); /* pattrib->ether_type */
pattrib->eth_type = eth_type;
@ -1329,7 +1334,6 @@ static struct recv_frame *recvframe_defrag(struct adapter *adapter,
struct __queue *defrag_q)
{
struct list_head *plist, *phead;
u8 wlanhdr_offset;
u8 curfragnum;
struct recv_frame *pfhdr, *pnfhdr;
struct recv_frame *prframe, *pnextrframe;
@ -1378,12 +1382,7 @@ static struct recv_frame *recvframe_defrag(struct adapter *adapter,
/* copy the 2nd~n fragment frame's payload to the first fragment */
/* get the 2nd~last fragment frame's payload */
wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
skb_pull(pnextrframe->pkt, wlanhdr_offset);
/* append to first fragment frame's tail (if privacy frame, pull the ICV) */
skb_trim(prframe->pkt, prframe->pkt->len - pfhdr->attrib.icv_len);
skb_pull(pnextrframe->pkt, pnfhdr->attrib.hdrlen);
/* memcpy */
memcpy(skb_tail_pointer(pfhdr->pkt), pnfhdr->pkt->data,
@ -1391,7 +1390,7 @@ static struct recv_frame *recvframe_defrag(struct adapter *adapter,
skb_put(prframe->pkt, pnfhdr->pkt->len);
pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
pfhdr->attrib.icv_len = 0;
plist = plist->next;
}
@ -1518,11 +1517,6 @@ static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
nr_subframes = 0;
pattrib = &prframe->attrib;
skb_pull(prframe->pkt, prframe->attrib.hdrlen);
if (prframe->attrib.iv_len > 0)
skb_pull(prframe->pkt, prframe->attrib.iv_len);
a_len = prframe->pkt->len;
pdata = prframe->pkt->data;
@ -1892,24 +1886,6 @@ static int process_recv_indicatepkts(struct adapter *padapter,
return retval;
}
static int recv_func_prehandle(struct adapter *padapter,
struct recv_frame *rframe)
{
int ret = _SUCCESS;
struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
/* check the frame crtl field and decache */
ret = validate_recv_frame(padapter, rframe);
if (ret != _SUCCESS) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
goto exit;
}
exit:
return ret;
}
static int recv_func_posthandle(struct adapter *padapter,
struct recv_frame *prframe)
{
@ -1962,6 +1938,7 @@ static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
struct rx_pkt_attrib *prxattrib = &rframe->attrib;
struct security_priv *psecuritypriv = &padapter->securitypriv;
struct mlme_priv *mlmepriv = &padapter->mlmepriv;
struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
/* check if need to handle uc_swdec_pending_queue*/
if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
@ -1973,9 +1950,12 @@ static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
}
}
ret = recv_func_prehandle(padapter, rframe);
if (ret == _SUCCESS) {
/* check the frame crtl field and decache */
ret = validate_recv_frame(padapter, rframe);
if (ret != _SUCCESS) {
RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
} else {
/* check if need to enqueue into uc_swdec_pending_queue*/
if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
!IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&