mirror of https://github.com/hak5/openwrt.git
madwifi: add configurable rssi threshold and timeout values for protection mode the 11b protection mode can harm throughput a lot, so let's make sure that it is only active as long as it needs to be.
SVN-Revision: 10899lede-17.01
Felix Fietkau
parent
3e03e66d7a
commit
73663230c8
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@ -0,0 +1,139 @@
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Index: madwifi-trunk-r3314/net80211/ieee80211.c
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===================================================================
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--- madwifi-trunk-r3314.orig/net80211/ieee80211.c 2008-04-21 05:22:20.000000000 +0200
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+++ madwifi-trunk-r3314/net80211/ieee80211.c 2008-04-21 05:23:46.000000000 +0200
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@@ -333,7 +333,9 @@
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IEEE80211_MS_TO_TU(IEEE80211_BMISSTHRESH_DEFAULT_MS),
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ic->ic_lintval), ic->ic_lintval);
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}
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-
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+ ic->ic_protmode_timeout = IEEE80211_PROTMODE_TIMEOUT;
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+ ic->ic_protmode_rssi = IEEE80211_PROTMODE_RSSITHR;
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+
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IEEE80211_LOCK_INIT(ic, "ieee80211com");
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IEEE80211_VAPS_LOCK_INIT(ic, "ieee80211com_vaps");
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TAILQ_INIT(&ic->ic_vaps);
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Index: madwifi-trunk-r3314/net80211/ieee80211_input.c
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===================================================================
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--- madwifi-trunk-r3314.orig/net80211/ieee80211_input.c 2008-04-21 05:22:32.000000000 +0200
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+++ madwifi-trunk-r3314/net80211/ieee80211_input.c 2008-04-21 05:23:46.000000000 +0200
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@@ -3412,16 +3412,32 @@
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IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) {
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/* Assume no ERP IE == 11b AP */
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- if ((!has_erp || (has_erp && (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) &&
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- !(ic->ic_flags & IEEE80211_F_USEPROT)) {
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+ if ((!has_erp || (has_erp &&
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+ (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) &&
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+ (rssi > ic->ic_protmode_rssi)) {
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struct ieee80211vap *tmpvap;
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- ic->ic_flags |= IEEE80211_F_USEPROT;
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- TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
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- tmpvap->iv_flags_ext |= IEEE80211_FEXT_ERPUPDATE;
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+ if (!(ic->ic_flags & IEEE80211_F_USEPROT)) {
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+ ic->ic_flags |= IEEE80211_F_USEPROT;
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+ TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
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+ tmpvap->iv_flags_ext |= IEEE80211_FEXT_ERPUPDATE;
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+ }
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}
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+ ic->ic_protmode_lasttrig = jiffies;
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}
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}
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+ if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
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+ (ic->ic_protmode_lasttrig + ic->ic_protmode_timeout * HZ <
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+ jiffies)) {
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+ struct ieee80211vap *tmpvap;
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+
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+ /* expire protection mode */
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+ ic->ic_flags &= ~IEEE80211_F_USEPROT;
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+ TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
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+ tmpvap->iv_flags_ext |= IEEE80211_FEXT_ERPUPDATE;
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+ }
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+ }
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+
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/*
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* If scanning, just pass information to the scan module.
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Index: madwifi-trunk-r3314/net80211/ieee80211_ioctl.h
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===================================================================
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--- madwifi-trunk-r3314.orig/net80211/ieee80211_ioctl.h 2008-04-21 05:22:20.000000000 +0200
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+++ madwifi-trunk-r3314/net80211/ieee80211_ioctl.h 2008-04-21 05:23:46.000000000 +0200
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@@ -643,6 +643,8 @@
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IEEE80211_PARAM_BEACON_MISS_THRESH_MS = 74, /* Beacon miss threshold (in ms) */
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IEEE80211_PARAM_MAXRATE = 75, /* Maximum rate (by table index) */
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IEEE80211_PARAM_MINRATE = 76, /* Maximum rate (by table index) */
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+ IEEE80211_PARAM_PROTMODE_RSSI = 77, /* RSSI Threshold for enabling protection mode */
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+ IEEE80211_PARAM_PROTMODE_TIMEOUT = 78, /* Timeout for expiring protection mode */
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};
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#define SIOCG80211STATS (SIOCDEVPRIVATE+2)
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Index: madwifi-trunk-r3314/net80211/ieee80211_var.h
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===================================================================
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--- madwifi-trunk-r3314.orig/net80211/ieee80211_var.h 2008-04-21 05:22:20.000000000 +0200
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+++ madwifi-trunk-r3314/net80211/ieee80211_var.h 2008-04-21 05:41:45.000000000 +0200
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@@ -128,6 +128,9 @@
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#define IEEE80211_APPIE_MAX 1024
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+#define IEEE80211_PROTMODE_RSSITHR 15 /* default rssi threshold for protection mode trigger */
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+#define IEEE80211_PROTMODE_TIMEOUT 30 /* timeout for keeping protection mode alive */
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+
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#define IEEE80211_PWRCONSTRAINT_VAL(ic) \
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(((ic)->ic_bsschan->ic_maxregpower > (ic)->ic_curchanmaxpwr) ? \
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(ic)->ic_bsschan->ic_maxregpower - (ic)->ic_curchanmaxpwr : 0)
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@@ -324,6 +327,9 @@
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u_int16_t ic_newtxpowlimit; /* tx power limit to change to (in 0.5 dBm) */
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u_int16_t ic_uapsdmaxtriggers; /* max triggers that could arrive */
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u_int8_t ic_coverageclass; /* coverage class */
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+ u_int8_t ic_protmode_rssi; /* rssi threshold for protection mode */
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+ u_int64_t ic_protmode_lasttrig; /* last trigger for protection mode */
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+ u_int16_t ic_protmode_timeout; /* protection mode timeout */
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/* Channel state:
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*
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Index: madwifi-trunk-r3314/net80211/ieee80211_wireless.c
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===================================================================
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--- madwifi-trunk-r3314.orig/net80211/ieee80211_wireless.c 2008-04-21 05:22:20.000000000 +0200
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+++ madwifi-trunk-r3314/net80211/ieee80211_wireless.c 2008-04-21 05:23:46.000000000 +0200
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@@ -2312,6 +2312,12 @@
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IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan))
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retv = ENETRESET;
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break;
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+ case IEEE80211_PARAM_PROTMODE_TIMEOUT:
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+ ic->ic_protmode_timeout = value;
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+ break;
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+ case IEEE80211_PARAM_PROTMODE_RSSI:
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+ ic->ic_protmode_rssi = value;
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+ break;
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case IEEE80211_PARAM_MCASTCIPHER:
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if ((vap->iv_caps & cipher2cap(value)) == 0 &&
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!ieee80211_crypto_available(vap, value))
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@@ -2955,6 +2961,12 @@
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case IEEE80211_PARAM_PROTMODE:
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param[0] = ic->ic_protmode;
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break;
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+ case IEEE80211_PARAM_PROTMODE_TIMEOUT:
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+ param[0] = ic->ic_protmode_timeout;
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+ break;
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+ case IEEE80211_PARAM_PROTMODE_RSSI:
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+ param[0] = ic->ic_protmode_rssi;
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+ break;
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case IEEE80211_PARAM_MCASTCIPHER:
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param[0] = rsn->rsn_mcastcipher;
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break;
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@@ -5346,6 +5358,14 @@
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IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "protmode" },
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{ IEEE80211_PARAM_PROTMODE,
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0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_protmode" },
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+ { IEEE80211_PARAM_PROTMODE_RSSI,
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+ IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "protrssi" },
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+ { IEEE80211_PARAM_PROTMODE_RSSI,
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+ 0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_protrssi" },
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+ { IEEE80211_PARAM_PROTMODE_TIMEOUT,
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+ IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "prottime" },
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+ { IEEE80211_PARAM_PROTMODE_TIMEOUT,
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+ 0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_prottime" },
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{ IEEE80211_PARAM_MCASTCIPHER,
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IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "mcastcipher" },
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{ IEEE80211_PARAM_MCASTCIPHER,
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