From: Felix Fietkau Date: Sun, 18 Mar 2012 21:58:04 +0000 (+0100) Subject: cfg80211: use compare_ether_addr on MAC addresses instead of memcmp X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c6fb08aaa879d1a70ed01e9ac1080066abf7ef78;p=openwrt%2Fstaging%2Fblogic.git cfg80211: use compare_ether_addr on MAC addresses instead of memcmp Because of the constant size and guaranteed 16 bit alignment, the inline compare_ether_addr function is much cheaper than calling memcmp. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index f5a7ac3a0939..e14fdcc1d7cd 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -6,6 +6,7 @@ #include #include +#include #include #include #include @@ -100,7 +101,7 @@ void __cfg80211_send_deauth(struct net_device *dev, ASSERT_WDEV_LOCK(wdev); if (wdev->current_bss && - memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { + compare_ether_addr(wdev->current_bss->pub.bssid, bssid) == 0) { cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(&wdev->current_bss->pub); wdev->current_bss = NULL; @@ -115,7 +116,7 @@ void __cfg80211_send_deauth(struct net_device *dev, reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); - from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0; + from_ap = compare_ether_addr(mgmt->sa, dev->dev_addr) != 0; __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap); } else if (wdev->sme_state == CFG80211_SME_CONNECTING) { __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, @@ -154,7 +155,7 @@ void __cfg80211_send_disassoc(struct net_device *dev, return; if (wdev->current_bss && - memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { + compare_ether_addr(wdev->current_bss->pub.bssid, bssid) == 0) { cfg80211_sme_disassoc(dev, wdev->current_bss); cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(&wdev->current_bss->pub); @@ -165,7 +166,7 @@ void __cfg80211_send_disassoc(struct net_device *dev, reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); - from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0; + from_ap = compare_ether_addr(mgmt->sa, dev->dev_addr) != 0; __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap); } EXPORT_SYMBOL(__cfg80211_send_disassoc); @@ -285,7 +286,7 @@ int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, return -EINVAL; if (wdev->current_bss && - memcmp(bssid, wdev->current_bss->pub.bssid, ETH_ALEN) == 0) + compare_ether_addr(bssid, wdev->current_bss->pub.bssid) == 0) return -EALREADY; memset(&req, 0, sizeof(req)); @@ -362,7 +363,7 @@ int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, memset(&req, 0, sizeof(req)); if (wdev->current_bss && prev_bssid && - memcmp(wdev->current_bss->pub.bssid, prev_bssid, ETH_ALEN) == 0) { + compare_ether_addr(wdev->current_bss->pub.bssid, prev_bssid) == 0) { /* * Trying to reassociate: Allow this to proceed and let the old * association to be dropped when the new one is completed. @@ -446,7 +447,8 @@ int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, if (local_state_change) { if (wdev->current_bss && - memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { + compare_ether_addr(wdev->current_bss->pub.bssid, bssid) + == 0) { cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(&wdev->current_bss->pub); wdev->current_bss = NULL; @@ -495,7 +497,7 @@ static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, req.local_state_change = local_state_change; req.ie = ie; req.ie_len = ie_len; - if (memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) + if (compare_ether_addr(wdev->current_bss->pub.bssid, bssid) == 0) req.bss = &wdev->current_bss->pub; else return -ENOTCONN; @@ -758,8 +760,8 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, break; } - if (memcmp(wdev->current_bss->pub.bssid, - mgmt->bssid, ETH_ALEN)) { + if (compare_ether_addr(wdev->current_bss->pub.bssid, + mgmt->bssid)) { err = -ENOTCONN; break; } @@ -772,8 +774,8 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, break; /* for station, check that DA is the AP */ - if (memcmp(wdev->current_bss->pub.bssid, - mgmt->da, ETH_ALEN)) { + if (compare_ether_addr(wdev->current_bss->pub.bssid, + mgmt->da)) { err = -ENOTCONN; break; } @@ -781,11 +783,11 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, case NL80211_IFTYPE_AP: case NL80211_IFTYPE_P2P_GO: case NL80211_IFTYPE_AP_VLAN: - if (memcmp(mgmt->bssid, dev->dev_addr, ETH_ALEN)) + if (compare_ether_addr(mgmt->bssid, dev->dev_addr)) err = -EINVAL; break; case NL80211_IFTYPE_MESH_POINT: - if (memcmp(mgmt->sa, mgmt->bssid, ETH_ALEN)) { + if (compare_ether_addr(mgmt->sa, mgmt->bssid)) { err = -EINVAL; break; } @@ -804,7 +806,7 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, return err; } - if (memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0) + if (compare_ether_addr(mgmt->sa, dev->dev_addr) != 0) return -EINVAL; /* Transmit the Action frame as requested by user space */ diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 70faadf16a32..fdbcfe692a36 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -378,7 +378,7 @@ static int cmp_bss_core(struct cfg80211_bss *a, b->len_information_elements); } - return memcmp(a->bssid, b->bssid, ETH_ALEN); + return compare_ether_addr(a->bssid, b->bssid); } static int cmp_bss(struct cfg80211_bss *a,