From: "M. Vefa Bicakci" <m.v.b@runbox.com>
To: linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org
Cc: gregkh@linuxfoundation.org, Jes.Sorensen@redhat.com,
joe@perches.com, Larry.Finger@lwfinger.net,
mail@beyermatthias.de, m.v.b@runbox.com
Subject: [PATCH v4 05/15] staging: rtl8723au: Reorganize a few functions to remove indentation
Date: Sat, 28 Mar 2015 08:52:38 -0400 [thread overview]
Message-ID: <1427547168-12078-6-git-send-email-m.v.b@runbox.com> (raw)
In-Reply-To: <1427547168-12078-1-git-send-email-m.v.b@runbox.com>
Prior to this commit, functions rtw_tkip_encrypt23a and rtw_tkip_decrypt23a had
large if blocks which contained the majority of the logic in the functions.
Rework these functions so that if the negated version of the aforementioned if
blocks' conditions are true, we return from the function with _FAIL, as
expected by the calling code.
This lets us remove two levels of indentation from the functions in
question, making them more readable.
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
---
drivers/staging/rtl8723au/core/rtw_security.c | 178 +++++++++++++-------------
1 file changed, 88 insertions(+), 90 deletions(-)
diff --git a/drivers/staging/rtl8723au/core/rtw_security.c b/drivers/staging/rtl8723au/core/rtw_security.c
index df1787f20e..f7b1d45981 100644
--- a/drivers/staging/rtl8723au/core/rtw_security.c
+++ b/drivers/staging/rtl8723au/core/rtw_security.c
@@ -618,6 +618,9 @@ int rtw_tkip_encrypt23a(struct rtw_adapter *padapter,
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
int res = _SUCCESS;
+ if (pattrib->encrypt != WLAN_CIPHER_SUITE_TKIP)
+ return _FAIL;
+
if (!pxmitframe->buf_addr)
return _FAIL;
@@ -625,71 +628,66 @@ int rtw_tkip_encrypt23a(struct rtw_adapter *padapter,
pframe = pxmitframe->buf_addr + hw_hdr_offset;
/* 4 start to encrypt each fragment */
- if (pattrib->encrypt == WLAN_CIPHER_SUITE_TKIP) {
- if (pattrib->psta)
- stainfo = pattrib->psta;
- else {
- DBG_8723A("%s, call rtw_get_stainfo()\n", __func__);
- stainfo = rtw_get_stainfo23a(&padapter->stapriv,
- &pattrib->ra[0]);
- }
-
- if (stainfo != NULL) {
-
- if (!(stainfo->state & _FW_LINKED)) {
- DBG_8723A("%s, psta->state(0x%x) != _FW_LINKED\n", __func__, stainfo->state);
- return _FAIL;
- }
+ if (pattrib->psta)
+ stainfo = pattrib->psta;
+ else {
+ DBG_8723A("%s, call rtw_get_stainfo()\n", __func__);
+ stainfo = rtw_get_stainfo23a(&padapter->stapriv,
+ &pattrib->ra[0]);
+ }
- RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_encrypt23a: stainfo!= NULL!!!\n"));
+ if (stainfo == NULL) {
+ RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_encrypt23a: stainfo == NULL!!!\n"));
+ DBG_8723A("%s, psta == NUL\n", __func__);
+ return _FAIL;
+ }
- if (is_multicast_ether_addr(pattrib->ra))
- prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey;
- else
- prwskey = &stainfo->dot118021x_UncstKey.skey[0];
+ if (!(stainfo->state & _FW_LINKED)) {
+ DBG_8723A("%s, psta->state(0x%x) != _FW_LINKED\n", __func__, stainfo->state);
+ return _FAIL;
+ }
- prwskeylen = 16;
+ RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_encrypt23a: stainfo!= NULL!!!\n"));
- for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) {
- iv = pframe+pattrib->hdrlen;
- payload = pframe+pattrib->iv_len+pattrib->hdrlen;
+ if (is_multicast_ether_addr(pattrib->ra))
+ prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey;
+ else
+ prwskey = &stainfo->dot118021x_UncstKey.skey[0];
- GET_TKIP_PN(iv, dot11txpn);
+ prwskeylen = 16;
- pnl = (u16)(dot11txpn.val);
- pnh = (u32)(dot11txpn.val>>16);
+ for (curfragnum = 0; curfragnum < pattrib->nr_frags; curfragnum++) {
+ iv = pframe+pattrib->hdrlen;
+ payload = pframe+pattrib->iv_len+pattrib->hdrlen;
- phase1((u16 *)&ttkey[0], prwskey, &pattrib->ta[0], pnh);
+ GET_TKIP_PN(iv, dot11txpn);
- phase2(&rc4key[0], prwskey, (u16 *)&ttkey[0], pnl);
+ pnl = (u16)(dot11txpn.val);
+ pnh = (u32)(dot11txpn.val>>16);
- if ((curfragnum + 1) == pattrib->nr_frags) { /* 4 the last fragment */
- length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len - pattrib->icv_len;
- RT_TRACE(_module_rtl871x_security_c_, _drv_info_, ("pattrib->iv_len =%x, pattrib->icv_len =%x\n", pattrib->iv_len, pattrib->icv_len));
- *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length));/* modified by Amy*/
+ phase1((u16 *)&ttkey[0], prwskey, &pattrib->ta[0], pnh);
- arcfour_init(&mycontext, rc4key, 16);
- arcfour_encrypt(&mycontext, payload, payload, length);
- arcfour_encrypt(&mycontext, payload+length, crc, 4);
+ phase2(&rc4key[0], prwskey, (u16 *)&ttkey[0], pnl);
- } else {
- length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
- *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length));/* modified by Amy*/
- arcfour_init(&mycontext, rc4key, 16);
- arcfour_encrypt(&mycontext, payload, payload, length);
- arcfour_encrypt(&mycontext, payload+length, crc, 4);
+ if ((curfragnum+1) == pattrib->nr_frags) { /* 4 the last fragment */
+ length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len - pattrib->icv_len;
+ RT_TRACE(_module_rtl871x_security_c_, _drv_info_, ("pattrib->iv_len =%x, pattrib->icv_len =%x\n", pattrib->iv_len, pattrib->icv_len));
+ *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length));/* modified by Amy*/
- pframe += pxmitpriv->frag_len;
- pframe = PTR_ALIGN(pframe, 4);
- }
- }
+ arcfour_init(&mycontext, rc4key, 16);
+ arcfour_encrypt(&mycontext, payload, payload, length);
+ arcfour_encrypt(&mycontext, payload+length, crc, 4);
} else {
- RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_encrypt23a: stainfo == NULL!!!\n"));
- DBG_8723A("%s, psta == NUL\n", __func__);
- res = _FAIL;
- }
+ length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
+ *((u32 *)crc) = cpu_to_le32(getcrc32(payload, length));/* modified by Amy*/
+ arcfour_init(&mycontext, rc4key, 16);
+ arcfour_encrypt(&mycontext, payload, payload, length);
+ arcfour_encrypt(&mycontext, payload+length, crc, 4);
+ pframe += pxmitpriv->frag_len;
+ pframe = PTR_ALIGN(pframe, 4);
+ }
}
return res;
@@ -715,58 +713,58 @@ int rtw_tkip_decrypt23a(struct rtw_adapter *padapter,
struct sk_buff *skb = precvframe->pkt;
int res = _SUCCESS;
+ if (prxattrib->encrypt != WLAN_CIPHER_SUITE_TKIP)
+ return _FAIL;
+
pframe = skb->data;
/* 4 start to decrypt recvframe */
- if (prxattrib->encrypt == WLAN_CIPHER_SUITE_TKIP) {
+ stainfo = rtw_get_stainfo23a(&padapter->stapriv,
+ &prxattrib->ta[0]);
+ if (stainfo == NULL) {
+ RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_decrypt23a: stainfo == NULL!!!\n"));
+ return _FAIL;
+ }
- stainfo = rtw_get_stainfo23a(&padapter->stapriv,
- &prxattrib->ta[0]);
- if (stainfo!= NULL) {
-
- if (is_multicast_ether_addr(prxattrib->ra)) {
- if (psecuritypriv->binstallGrpkey == 0) {
- res = _FAIL;
- DBG_8723A("%s:rx bc/mc packets, but didn't install group key!!!!!!!!!!\n", __func__);
- goto exit;
- }
- prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey;
- prwskeylen = 16;
- } else {
- RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_decrypt23a: stainfo!= NULL!!!\n"));
- prwskey = &stainfo->dot118021x_UncstKey.skey[0];
- prwskeylen = 16;
- }
+ if (is_multicast_ether_addr(prxattrib->ra)) {
+ if (psecuritypriv->binstallGrpkey == 0) {
+ res = _FAIL;
+ DBG_8723A("%s:rx bc/mc packets, but didn't install group key!!!!!!!!!!\n", __func__);
+ goto exit;
+ }
+ prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey;
+ prwskeylen = 16;
+ } else {
+ RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_decrypt23a: stainfo!= NULL!!!\n"));
+ prwskey = &stainfo->dot118021x_UncstKey.skey[0];
+ prwskeylen = 16;
+ }
- iv = pframe+prxattrib->hdrlen;
- payload = pframe+prxattrib->iv_len+prxattrib->hdrlen;
- length = skb->len - prxattrib->hdrlen-prxattrib->iv_len;
+ iv = pframe+prxattrib->hdrlen;
+ payload = pframe+prxattrib->iv_len+prxattrib->hdrlen;
+ length = skb->len - prxattrib->hdrlen-prxattrib->iv_len;
- GET_TKIP_PN(iv, dot11txpn);
+ GET_TKIP_PN(iv, dot11txpn);
- pnl = (u16)(dot11txpn.val);
- pnh = (u32)(dot11txpn.val>>16);
+ pnl = (u16)(dot11txpn.val);
+ pnh = (u32)(dot11txpn.val>>16);
- phase1((u16 *)&ttkey[0], prwskey, &prxattrib->ta[0], pnh);
- phase2(&rc4key[0], prwskey, (unsigned short *)&ttkey[0], pnl);
+ phase1((u16 *)&ttkey[0], prwskey, &prxattrib->ta[0], pnh);
+ phase2(&rc4key[0], prwskey, (unsigned short *)&ttkey[0], pnl);
- /* 4 decrypt payload include icv */
- arcfour_init(&mycontext, rc4key, 16);
- arcfour_encrypt(&mycontext, payload, payload, length);
+ /* 4 decrypt payload include icv */
+ arcfour_init(&mycontext, rc4key, 16);
+ arcfour_encrypt(&mycontext, payload, payload, length);
- *((u32 *)crc) = le32_to_cpu(getcrc32(payload, length - 4));
+ *((u32 *)crc) = le32_to_cpu(getcrc32(payload, length - 4));
- if (crc[3] != payload[length - 1] || crc[2] != payload[length - 2] || crc[1] != payload[length - 3] || crc[0] != payload[length - 4])
- {
- RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_wep_decrypt23a:icv error crc[3](%x)!= payload[length-1](%x) || crc[2](%x)!= payload[length-2](%x) || crc[1](%x)!= payload[length-3](%x) || crc[0](%x)!= payload[length-4](%x)\n",
- crc[3], payload[length - 1], crc[2], payload[length - 2], crc[1], payload[length - 3], crc[0], payload[length - 4]));
- res = _FAIL;
- }
- } else {
- RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_tkip_decrypt23a: stainfo == NULL!!!\n"));
- res = _FAIL;
- }
+ if (crc[3] != payload[length - 1] || crc[2] != payload[length - 2] || crc[1] != payload[length - 3] || crc[0] != payload[length - 4])
+ {
+ RT_TRACE(_module_rtl871x_security_c_, _drv_err_, ("rtw_wep_decrypt23a:icv error crc[3](%x)!= payload[length-1](%x) || crc[2](%x)!= payload[length-2](%x) || crc[1](%x)!= payload[length-3](%x) || crc[0](%x)!= payload[length-4](%x)\n",
+ crc[3], payload[length - 1], crc[2], payload[length - 2], crc[1], payload[length - 3], crc[0], payload[length - 4]));
+ res = _FAIL;
}
+
exit:
return res;
}
--
2.1.4
next prev parent reply other threads:[~2015-03-28 12:56 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-28 12:52 [PATCH v4 00/15] checkpatch clean-up of rtl8723au's rtw_security.c M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 01/15] staging: rtl8723au: Reformat whitespace to increase readability M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 02/15] staging: rtl8723au: Fix "before/around/after" whitespace issues M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 03/15] staging: rtl8723au: else should follow close brace M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 04/15] staging: rtl8723au: Fix the indentation of two lines M. Vefa Bicakci
2015-03-28 12:52 ` M. Vefa Bicakci [this message]
2015-03-28 12:52 ` [PATCH v4 06/15] staging: rtl8723au: else is not generally useful after a return M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 07/15] staging: rtl8723au: Remove unneeded curly braces M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 08/15] staging: rtl8723au: trailing statements should be on next line M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 09/15] staging: rtl8723au: that open brace should be on the previous line M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 10/15] staging: rtl8723au: No spaces at the start of a line M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 11/15] staging: rtl8723au: Adjust whitespace in and around comments M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 12/15] staging: rtl8723au: suspect code indent for conditional statements M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 13/15] staging: rtl8723au: Rework two byte array comparisons M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 14/15] staging: rtl8723au: Use __func__ in trace logs M. Vefa Bicakci
2015-03-28 12:52 ` [PATCH v4 15/15] staging: rtl8723au: Remove unneeded comments M. Vefa Bicakci
2015-03-28 19:52 ` [PATCH v4 00/15] checkpatch clean-up of rtl8723au's rtw_security.c Joe Perches
2015-03-28 23:58 ` M. Vefa Bicakci
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1427547168-12078-6-git-send-email-m.v.b@runbox.com \
--to=m.v.b@runbox.com \
--cc=Jes.Sorensen@redhat.com \
--cc=Larry.Finger@lwfinger.net \
--cc=gregkh@linuxfoundation.org \
--cc=joe@perches.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-wireless@vger.kernel.org \
--cc=mail@beyermatthias.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox