[PATCH 17/21] hostap: slight optimization of addr compare
From: Ding Tianhong
Date: Mon Dec 23 2013 - 00:12:20 EST
Use the recently added and possibly more efficient
ether_addr_equal_unaligned to instead of memcmp.
Cc: Jouni Malinen <j@xxxxx>
Cc: "John W. Linville" <linville@xxxxxxxxxxxxx>
Cc: linux-wireless@xxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Weilong Chen <chenweilong@xxxxxxxxxx>
Signed-off-by: Ding Tianhong <dingtianhong@xxxxxxxxxx>
---
drivers/net/wireless/hostap/hostap_80211_rx.c | 24 +++++++++++------------
drivers/net/wireless/hostap/hostap_80211_tx.c | 4 ++--
drivers/net/wireless/hostap/hostap_ap.c | 28 +++++++++++++--------------
drivers/net/wireless/hostap/hostap_hw.c | 2 +-
drivers/net/wireless/hostap/hostap_info.c | 2 +-
drivers/net/wireless/hostap/hostap_ioctl.c | 4 ++--
drivers/net/wireless/hostap/hostap_main.c | 8 +++-----
7 files changed, 35 insertions(+), 37 deletions(-)
diff --git a/drivers/net/wireless/hostap/hostap_80211_rx.c b/drivers/net/wireless/hostap/hostap_80211_rx.c
index d39e3e2..1c4f049 100644
--- a/drivers/net/wireless/hostap/hostap_80211_rx.c
+++ b/drivers/net/wireless/hostap/hostap_80211_rx.c
@@ -238,8 +238,8 @@ prism2_frag_cache_find(local_info_t *local, unsigned int seq,
if (entry->skb != NULL && entry->seq == seq &&
(entry->last_frag + 1 == frag || frag == -1) &&
- memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
- memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
+ ether_addr_equal_unaligned(entry->src_addr, src) &&
+ ether_addr_equal_unaligned(entry->dst_addr, dst))
return entry;
}
@@ -332,7 +332,7 @@ static struct hostap_bss_info *__hostap_get_bss(local_info_t *local, u8 *bssid,
list_for_each(ptr, &local->bss_list) {
bss = list_entry(ptr, struct hostap_bss_info, list);
- if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0 &&
+ if (ether_addr_equal_unaligned(bss->bssid, bssid) &&
(ssid == NULL ||
(ssid_len == bss->ssid_len &&
memcmp(ssid, bss->ssid, ssid_len) == 0))) {
@@ -540,7 +540,7 @@ static struct net_device *prism2_rx_get_wds(local_info_t *local,
list_for_each(ptr, &local->hostap_interfaces) {
iface = list_entry(ptr, struct hostap_interface, list);
if (iface->type == HOSTAP_INTERFACE_WDS &&
- memcmp(iface->u.wds.remote_addr, addr, ETH_ALEN) == 0)
+ ether_addr_equal_unaligned(iface->u.wds.remote_addr, addr))
break;
iface = NULL;
}
@@ -563,7 +563,7 @@ hostap_rx_frame_wds(local_info_t *local, struct ieee80211_hdr *hdr, u16 fc,
/* Possible WDS frame: either IEEE 802.11 compliant (if FromDS)
* or own non-standard frame with 4th address after payload */
- if (memcmp(hdr->addr1, local->dev->dev_addr, ETH_ALEN) != 0 &&
+ if (!ether_addr_equal_unaligned(hdr->addr1, local->dev->dev_addr) &&
(hdr->addr1[0] != 0xff || hdr->addr1[1] != 0xff ||
hdr->addr1[2] != 0xff || hdr->addr1[3] != 0xff ||
hdr->addr1[4] != 0xff || hdr->addr1[5] != 0xff)) {
@@ -581,7 +581,7 @@ hostap_rx_frame_wds(local_info_t *local, struct ieee80211_hdr *hdr, u16 fc,
if (*wds == NULL && fc & IEEE80211_FCTL_FROMDS &&
(local->iw_mode != IW_MODE_INFRA ||
!(local->wds_type & HOSTAP_WDS_AP_CLIENT) ||
- memcmp(hdr->addr2, local->bssid, ETH_ALEN) != 0)) {
+ !ether_addr_equal_unaligned(hdr->addr2, local->bssid))) {
/* require that WDS link has been registered with TA or the
* frame is from current AP when using 'AP client mode' */
PDEBUG(DEBUG_EXTRA, "%s: received WDS[4 addr] frame "
@@ -622,12 +622,12 @@ static int hostap_is_eapol_frame(local_info_t *local, struct sk_buff *skb)
/* check that the frame is unicast frame to us */
if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
IEEE80211_FCTL_TODS &&
- memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
- memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
+ ether_addr_equal_unaligned(hdr->addr1, dev->dev_addr) &&
+ ether_addr_equal_unaligned(hdr->addr3, dev->dev_addr)) {
/* ToDS frame with own addr BSSID and DA */
} else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
IEEE80211_FCTL_FROMDS &&
- memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+ ether_addr_equal_unaligned(hdr->addr1, dev->dev_addr)) {
/* FromDS frame with own addr as DA */
} else
return 0;
@@ -870,7 +870,7 @@ void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
(fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
IEEE80211_FCTL_FROMDS &&
local->stadev &&
- memcmp(hdr->addr2, local->assoc_ap_addr, ETH_ALEN) == 0) {
+ ether_addr_equal_unaligned(hdr->addr2, local->assoc_ap_addr)) {
/* Frame from BSSID of the AP for which we are a client */
skb->dev = dev = local->stadev;
from_assoc_ap = 1;
@@ -1034,9 +1034,9 @@ void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
/* convert hdr + possible LLC headers into Ethernet header */
if (skb->len - hdrlen >= 8 &&
- ((memcmp(payload, rfc1042_header, 6) == 0 &&
+ ((ether_addr_equal_unaligned(payload, rfc1042_header) &&
ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
- memcmp(payload, bridge_tunnel_header, 6) == 0)) {
+ ether_addr_equal_unaligned(payload, bridge_tunnel_header))) {
/* remove RFC1042 or Bridge-Tunnel encapsulation and
* replace EtherType */
skb_pull(skb, hdrlen + 6);
diff --git a/drivers/net/wireless/hostap/hostap_80211_tx.c b/drivers/net/wireless/hostap/hostap_80211_tx.c
index 344a981..9b1d314 100644
--- a/drivers/net/wireless/hostap/hostap_80211_tx.c
+++ b/drivers/net/wireless/hostap/hostap_80211_tx.c
@@ -1,5 +1,6 @@
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/etherdevice.h>
#include "hostap_80211.h"
#include "hostap_common.h"
@@ -103,8 +104,7 @@ netdev_tx_t hostap_data_start_xmit(struct sk_buff *skb,
return NETDEV_TX_OK;
} else if (local->iw_mode == IW_MODE_INFRA &&
(local->wds_type & HOSTAP_WDS_AP_CLIENT) &&
- memcmp(skb->data + ETH_ALEN, dev->dev_addr,
- ETH_ALEN) != 0) {
+ !ether_addr_equal_unaligned(skb->data + ETH_ALEN, dev->dev_addr)) {
/* AP client mode: send frames with foreign src addr
* using 4-addr WDS frames */
use_wds = WDS_COMPLIANT_FRAME;
diff --git a/drivers/net/wireless/hostap/hostap_ap.c b/drivers/net/wireless/hostap/hostap_ap.c
index d6033a8..1f22e92 100644
--- a/drivers/net/wireless/hostap/hostap_ap.c
+++ b/drivers/net/wireless/hostap/hostap_ap.c
@@ -24,6 +24,7 @@
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/moduleparam.h>
+#include <linux/etherdevice.h>
#include "hostap_wlan.h"
#include "hostap.h"
@@ -106,13 +107,12 @@ static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
s = ap->sta_hash[STA_HASH(sta->addr)];
if (s == NULL) return;
- if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
+ if (ether_addr_equal_unaligned(s->addr, sta->addr)) {
ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
return;
}
- while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
- != 0)
+ while (s->hnext != NULL && !ether_addr_equal_unaligned(s->hnext->addr, sta->addr))
s = s->hnext;
if (s->hnext != NULL)
s->hnext = s->hnext->hnext;
@@ -435,7 +435,7 @@ int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
entry = list_entry(ptr, struct mac_entry, list);
- if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
+ if (ether_addr_equal_unaligned(entry->addr, mac)) {
list_del(ptr);
kfree(entry);
mac_restrictions->entries--;
@@ -459,7 +459,7 @@ static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
spin_lock_bh(&mac_restrictions->lock);
list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
- if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
+ if (ether_addr_equal_unaligned(entry->addr, mac)) {
found = 1;
break;
}
@@ -957,7 +957,7 @@ static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
struct sta_info *s;
s = ap->sta_hash[STA_HASH(sta)];
- while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
+ while (s != NULL && !ether_addr_equal_unaligned(s->addr, sta))
s = s->hnext;
return s;
}
@@ -1391,7 +1391,7 @@ static void handle_authen(local_info_t *local, struct sk_buff *skb,
status_code = __le16_to_cpu(*pos);
pos++;
- if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
+ if (ether_addr_equal_unaligned(dev->dev_addr, hdr->addr2) ||
ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
txt = "authentication denied";
resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
@@ -1935,7 +1935,7 @@ static void handle_pspoll(local_info_t *local,
PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
- if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+ if (!ether_addr_equal_unaligned(hdr->addr1, dev->dev_addr)) {
PDEBUG(DEBUG_AP,
"handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
hdr->addr1);
@@ -2230,7 +2230,7 @@ static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
goto done;
}
- if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+ if (!ether_addr_equal_unaligned(hdr->addr1, dev->dev_addr)) {
PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
" not own MAC\n", hdr->addr1);
goto done;
@@ -2267,13 +2267,13 @@ static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
goto done;
}
- if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
+ if (!ether_addr_equal_unaligned(hdr->addr1, dev->dev_addr)) {
PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
" not own MAC\n", hdr->addr1);
goto done;
}
- if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
+ if (!ether_addr_equal_unaligned(hdr->addr3, dev->dev_addr)) {
PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
" not own MAC\n", hdr->addr3);
goto done;
@@ -3035,7 +3035,7 @@ ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
if (!wds) {
/* FromDS frame - not for us; probably
* broadcast/multicast in another BSS - drop */
- if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+ if (ether_addr_equal_unaligned(hdr->addr1, dev->dev_addr)) {
printk(KERN_DEBUG "Odd.. FromDS packet "
"received with own BSSID\n");
hostap_dump_rx_80211(dev->name, skb, rx_stats);
@@ -3044,7 +3044,7 @@ ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
goto out;
}
} else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
- memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+ ether_addr_equal_unaligned(hdr->addr1, dev->dev_addr)) {
if (local->hostapd) {
prism2_rx_80211(local->apdev, skb, rx_stats,
@@ -3073,7 +3073,7 @@ ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
/* If BSSID (Addr3) is foreign, this frame is a normal
* broadcast frame from an IBSS network. Drop it silently.
* If BSSID is own, report the dropping of this frame. */
- if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
+ if (ether_addr_equal_unaligned(hdr->addr3, dev->dev_addr)) {
printk(KERN_DEBUG "%s: dropped received packet from %pM"
" with no ToDS flag "
"(type=0x%02x, subtype=0x%02x)\n", dev->name,
diff --git a/drivers/net/wireless/hostap/hostap_hw.c b/drivers/net/wireless/hostap/hostap_hw.c
index c275dc1..4214633 100644
--- a/drivers/net/wireless/hostap/hostap_hw.c
+++ b/drivers/net/wireless/hostap/hostap_hw.c
@@ -2175,7 +2175,7 @@ static void hostap_tx_callback(local_info_t *local,
struct hostap_tx_callback_info *cb;
/* Make sure that frame was from us. */
- if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) {
+ if (!ether_addr_equal_unaligned(txdesc->addr2, local->dev->dev_addr)) {
printk(KERN_DEBUG "%s: TX callback - foreign frame\n",
local->dev->name);
return;
diff --git a/drivers/net/wireless/hostap/hostap_info.c b/drivers/net/wireless/hostap/hostap_info.c
index de7c4ff..4644af6 100644
--- a/drivers/net/wireless/hostap/hostap_info.c
+++ b/drivers/net/wireless/hostap/hostap_info.c
@@ -207,7 +207,7 @@ static void prism2_host_roaming(local_info_t *local)
dev->name, local->preferred_ap);
for (i = 0; i < local->last_scan_results_count; i++) {
entry = &local->last_scan_results[i];
- if (memcmp(local->preferred_ap, entry->bssid, 6) == 0)
+ if (ether_addr_equal_unaligned(local->preferred_ap, entry->bssid))
{
PDEBUG(DEBUG_EXTRA, "%s: using preferred AP "
"selection\n", dev->name);
diff --git a/drivers/net/wireless/hostap/hostap_ioctl.c b/drivers/net/wireless/hostap/hostap_ioctl.c
index e509030..d3f1cb5 100644
--- a/drivers/net/wireless/hostap/hostap_ioctl.c
+++ b/drivers/net/wireless/hostap/hostap_ioctl.c
@@ -655,7 +655,7 @@ static int hostap_join_ap(struct net_device *dev)
if (!local->last_scan_results)
break;
entry = &local->last_scan_results[i];
- if (memcmp(local->preferred_ap, entry->bssid, ETH_ALEN) == 0) {
+ if (ether_addr_equal_unaligned(local->preferred_ap, entry->bssid)) {
req.channel = entry->chid;
break;
}
@@ -1978,7 +1978,7 @@ static inline int prism2_translate_scan(local_info_t *local,
list_for_each(ptr, &local->bss_list) {
struct hostap_bss_info *bss;
bss = list_entry(ptr, struct hostap_bss_info, list);
- if (memcmp(bss->bssid, scan->bssid, ETH_ALEN) == 0) {
+ if (ether_addr_equal_unaligned(bss->bssid, scan->bssid)) {
bss->included = 1;
current_ev = __prism2_translate_scan(
local, info, scan, bss, current_ev,
diff --git a/drivers/net/wireless/hostap/hostap_main.c b/drivers/net/wireless/hostap/hostap_main.c
index a1257c9..5de36ef 100644
--- a/drivers/net/wireless/hostap/hostap_main.c
+++ b/drivers/net/wireless/hostap/hostap_main.c
@@ -155,8 +155,7 @@ int prism2_wds_add(local_info_t *local, u8 *remote_addr,
if (prism2_wds_special_addr(iface->u.wds.remote_addr))
empty = iface;
- else if (memcmp(iface->u.wds.remote_addr, remote_addr,
- ETH_ALEN) == 0) {
+ else if (ether_addr_equal_unaligned(iface->u.wds.remote_addr, remote_addr)) {
match = iface;
break;
}
@@ -214,8 +213,7 @@ int prism2_wds_del(local_info_t *local, u8 *remote_addr,
if (iface->type != HOSTAP_INTERFACE_WDS)
continue;
- if (memcmp(iface->u.wds.remote_addr, remote_addr,
- ETH_ALEN) == 0) {
+ if (ether_addr_equal_unaligned(iface->u.wds.remote_addr, remote_addr)) {
selected = iface;
break;
}
@@ -1085,7 +1083,7 @@ int prism2_sta_deauth(local_info_t *local, u16 reason)
if (local->iw_mode != IW_MODE_INFRA ||
is_zero_ether_addr(local->bssid) ||
- memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
+ ether_addr_equal_unaligned(local->bssid, "\x44\x44\x44\x44\x44\x44"))
return 0;
ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
--
1.8.0
--
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