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openwrt/package/madwifi/patches/415-chan_switch.patch
Felix Fietkau b364aae254 madwifi: fix run-time channel switching in ap mode (including CSA) 
SVN-Revision: 15032
2009-03-25 01:26:55 +00:00

188 lines
6.3 KiB
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--- a/net80211/ieee80211_beacon.c
+++ b/net80211/ieee80211_beacon.c
@@ -224,18 +224,18 @@ ieee80211_beacon_alloc(struct ieee80211_
pktlen = 8 /* time stamp */
+ sizeof(u_int16_t) /* beacon interval */
+ sizeof(u_int16_t) /* capability information */
- + 2 + ni->ni_esslen /* ssid */
+ + 2 + IEEE80211_NWID_LEN /* ssid */
+ 2 + IEEE80211_RATE_SIZE /* supported rates */
+ 7 /* FH/DS parameters max(7,3) */
- + 2 + 4 + vap->iv_tim_len /* IBSS/TIM parameter set*/
+ + sizeof(struct ieee80211_tim_ie) + 128 /* IBSS/TIM parameter set*/
+ ic->ic_country_ie.country_len + 2 /* country code */
+ 3 /* power constraint */
+ 5 /* channel switch announcement */
+ 3 /* ERP */
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) /* Ext. Supp. Rates */
- + (vap->iv_caps & IEEE80211_C_WME ? /* WME */
+ + (ic->ic_caps & IEEE80211_C_WME ? /* WME */
sizeof(struct ieee80211_wme_param) : 0)
- + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
+ + (ic->ic_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
2 * sizeof(struct ieee80211_ie_wpa) : 0)
+ sizeof(struct ieee80211_ie_athAdvCap)
#ifdef ATH_SUPERG_XR
@@ -290,17 +290,26 @@ ieee80211_beacon_update(struct ieee80211
IEEE80211_LOCK_IRQ(ic);
/* Check if we need to change channel right now */
- if ((ic->ic_flags & IEEE80211_F_DOTH) &&
- (vap->iv_flags & IEEE80211_F_CHANSWITCH)) {
- struct ieee80211_channel *c =
+ if (ic->ic_flags & IEEE80211_F_CHANSWITCH) {
+ struct ieee80211_channel *c =
ieee80211_doth_findchan(vap, ic->ic_chanchange_chan);
-
- if (!vap->iv_chanchange_count && !c) {
- vap->iv_flags &= ~IEEE80211_F_CHANSWITCH;
- ic->ic_flags &= ~IEEE80211_F_CHANSWITCH;
- } else if (vap->iv_chanchange_count &&
- ((!ic->ic_chanchange_tbtt) ||
- (vap->iv_chanchange_count == ic->ic_chanchange_tbtt))) {
+ struct ieee80211vap *avp;
+ int do_switch = 1;
+
+ TAILQ_FOREACH(avp, &ic->ic_vaps, iv_next) {
+ if (!(avp->iv_flags & IEEE80211_F_CHANSWITCH))
+ continue;
+
+ do_switch = 0;
+ break;
+ }
+ if (vap->iv_flags & IEEE80211_F_CHANSWITCH) {
+ if (vap->iv_chanchange_count-- <= 1) {
+ vap->iv_flags &= ~IEEE80211_F_CHANSWITCH;
+ vap->iv_chanchange_count = 0;
+ }
+ }
+ if (do_switch) {
u_int8_t *frm;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOTH,
@@ -316,16 +325,7 @@ ieee80211_beacon_update(struct ieee80211
} else
ic->ic_bsschan = c;
- skb_pull(skb, sizeof(struct ieee80211_frame));
- skb_trim(skb, 0);
- frm = skb->data;
- skb_put(skb, ieee80211_beacon_init(ni, bo, frm) - frm);
- skb_push(skb, sizeof(struct ieee80211_frame));
-
- vap->iv_chanchange_count = 0;
- vap->iv_flags &= ~IEEE80211_F_CHANSWITCH;
ic->ic_flags &= ~IEEE80211_F_CHANSWITCH;
-
/* NB: Only for the first VAP to get here, and when we
* have a valid channel to which to change. */
if (c && (ic->ic_curchan != c)) {
@@ -488,22 +488,20 @@ ieee80211_beacon_update(struct ieee80211
if (IEEE80211_IS_MODE_BEACON(vap->iv_opmode)) {
- if ((ic->ic_flags & IEEE80211_F_DOTH) &&
- (ic->ic_flags & IEEE80211_F_CHANSWITCH)) {
+ if (ic->ic_flags & IEEE80211_F_CHANSWITCH) {
struct ieee80211_ie_csa *csa_ie =
(struct ieee80211_ie_csa *)bo->bo_chanswitch;
- IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOTH,
+ if (csa_ie->csa_len == 0) {
+ IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOTH,
"%s: Sending 802.11h chanswitch IE: "
"%d/%d\n", __func__,
ic->ic_chanchange_chan,
ic->ic_chanchange_tbtt);
- if (!vap->iv_chanchange_count) {
- vap->iv_flags |= IEEE80211_F_CHANSWITCH;
/* copy out trailer to open up a slot */
memmove(bo->bo_chanswitch + sizeof(*csa_ie),
- bo->bo_chanswitch,
+ bo->bo_chanswitch,
bo->bo_chanswitch_trailerlen);
/* add ie in opened slot */
@@ -523,17 +521,15 @@ ieee80211_beacon_update(struct ieee80211
bo->bo_ath_caps += sizeof(*csa_ie);
bo->bo_xr += sizeof(*csa_ie);
- /* indicate new beacon length so other layers
+ /* indicate new beacon length so other layers
* may manage memory */
skb_put(skb, sizeof(*csa_ie));
len_changed = 1;
- } else if(csa_ie->csa_count)
- csa_ie->csa_count--;
-
- vap->iv_chanchange_count++;
- IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOTH,
- "%s: CHANSWITCH IE, change in %d TBTT\n",
- __func__, csa_ie->csa_count);
+
+ IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOTH,
+ "%s: CHANSWITCH IE, change in %d TBTT\n",
+ __func__, csa_ie->csa_count);
+ }
}
#ifdef ATH_SUPERG_XR
if (vap->iv_flags & IEEE80211_F_XRUPDATE) {
--- a/net80211/ieee80211_wireless.c
+++ b/net80211/ieee80211_wireless.c
@@ -699,39 +699,11 @@ ieee80211_ioctl_siwfreq(struct net_devic
if (c == NULL) /* no channel */
return -EINVAL;
}
- /*
- * Fine tune channel selection based on desired mode:
- * if 11b is requested, find the 11b version of any
- * 11g channel returned,
- * if static turbo, find the turbo version of any
- * 11a channel return,
- * otherwise we should be ok with what we've got.
- */
- switch (vap->iv_des_mode) {
- case IEEE80211_MODE_11B:
- if (IEEE80211_IS_CHAN_ANYG(c)) {
- c2 = findchannel(ic, i, IEEE80211_MODE_11B);
- /* NB: should not happen, =>'s 11g w/o 11b */
- if (c2 != NULL)
- c = c2;
- }
- break;
- case IEEE80211_MODE_TURBO_A:
- if (IEEE80211_IS_CHAN_A(c)) {
- c2 = findchannel(ic, i, IEEE80211_MODE_TURBO_A);
- if (c2 != NULL)
- c = c2;
- }
- break;
- default: /* NB: no static turboG */
- break;
- }
+
if (ieee80211_check_mode_consistency(ic, vap->iv_des_mode, c)) {
if (vap->iv_opmode == IEEE80211_M_HOSTAP)
return -EINVAL;
}
- if ((vap->iv_state == IEEE80211_S_RUN) && (c == vap->iv_des_chan))
- return 0; /* no change, return */
/* Don't allow to change to channel with radar found */
if (c->ic_flags & IEEE80211_CHAN_RADAR)
@@ -4625,7 +4597,13 @@ static void
pre_announced_chanswitch(struct net_device *dev, u_int32_t channel, u_int32_t tbtt) {
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;
+ struct ieee80211vap *avp;
+
/* now flag the beacon update to include the channel switch IE */
+ TAILQ_FOREACH(avp, &ic->ic_vaps, iv_next) {
+ avp->iv_flags |= IEEE80211_F_CHANSWITCH;
+ avp->iv_chanchange_count = tbtt;
+ }
ic->ic_flags |= IEEE80211_F_CHANSWITCH;
ic->ic_chanchange_chan = channel;
ic->ic_chanchange_tbtt = tbtt;
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