From 9d139c810a2aa17365cc548d0cd2a189d8433c65 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 9 Jul 2008 14:40:37 +0200 Subject: mac80211: revamp beacon configuration This patch changes mac80211's beacon configuration handling to never pass skbs to the driver directly but rather always require the driver to use ieee80211_beacon_get(). Additionally, it introduces "change flags" on the config_interface() call to enable drivers to figure out what is changing. Finally, it removes the beacon_update() driver callback in favour of having IBSS beacon delivered by ieee80211_beacon_get() as well. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/mlme.c | 112 +++++++++++++++++++++------------------------------- 1 file changed, 45 insertions(+), 67 deletions(-) (limited to 'net/mac80211/mlme.c') diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 64d710a88b86..61d7f81bf45e 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2406,8 +2406,6 @@ static int ieee80211_sta_join_ibss(struct net_device *dev, int res, rates, i, j; struct sk_buff *skb; struct ieee80211_mgmt *mgmt; - struct ieee80211_tx_info *control; - struct rate_selection ratesel; u8 *pos; struct ieee80211_sub_if_data *sdata; struct ieee80211_supported_band *sband; @@ -2425,7 +2423,7 @@ static int ieee80211_sta_join_ibss(struct net_device *dev, local->ops->reset_tsf(local_to_hw(local)); } memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); - res = ieee80211_if_config(dev); + res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); if (res) return res; @@ -2439,19 +2437,16 @@ static int ieee80211_sta_join_ibss(struct net_device *dev, if (res) return res; - /* Set beacon template */ + /* Build IBSS probe response */ skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); - do { - if (!skb) - break; - + if (skb) { skb_reserve(skb, local->hw.extra_tx_headroom); mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + sizeof(mgmt->u.beacon)); memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, - IEEE80211_STYPE_BEACON); + IEEE80211_STYPE_PROBE_RESP); memset(mgmt->da, 0xff, ETH_ALEN); memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); @@ -2495,61 +2490,22 @@ static int ieee80211_sta_join_ibss(struct net_device *dev, memcpy(pos, &bss->supp_rates[8], rates); } - control = IEEE80211_SKB_CB(skb); - - rate_control_get_rate(dev, sband, skb, &ratesel); - if (ratesel.rate_idx < 0) { - printk(KERN_DEBUG "%s: Failed to determine TX rate " - "for IBSS beacon\n", dev->name); - break; - } - control->control.vif = &sdata->vif; - control->tx_rate_idx = ratesel.rate_idx; - if (sdata->bss_conf.use_short_preamble && - sband->bitrates[ratesel.rate_idx].flags & IEEE80211_RATE_SHORT_PREAMBLE) - control->flags |= IEEE80211_TX_CTL_SHORT_PREAMBLE; - control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; - control->flags |= IEEE80211_TX_CTL_NO_ACK; - control->flags |= IEEE80211_TX_CTL_DO_NOT_ENCRYPT; - control->control.retry_limit = 1; - - ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); - if (ifsta->probe_resp) { - mgmt = (struct ieee80211_mgmt *) - ifsta->probe_resp->data; - mgmt->frame_control = - IEEE80211_FC(IEEE80211_FTYPE_MGMT, - IEEE80211_STYPE_PROBE_RESP); - } else { - printk(KERN_DEBUG "%s: Could not allocate ProbeResp " - "template for IBSS\n", dev->name); - } - - if (local->ops->beacon_update && - local->ops->beacon_update(local_to_hw(local), skb) == 0) { - printk(KERN_DEBUG "%s: Configured IBSS beacon " - "template\n", dev->name); - skb = NULL; - } - - rates = 0; - sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; - for (i = 0; i < bss->supp_rates_len; i++) { - int bitrate = (bss->supp_rates[i] & 0x7f) * 5; - for (j = 0; j < sband->n_bitrates; j++) - if (sband->bitrates[j].bitrate == bitrate) - rates |= BIT(j); - } - ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; + ifsta->probe_resp = skb; - ieee80211_sta_def_wmm_params(dev, bss, 1); - } while (0); + ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); + } - if (skb) { - printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " - "template\n", dev->name); - dev_kfree_skb(skb); + rates = 0; + sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; + for (i = 0; i < bss->supp_rates_len; i++) { + int bitrate = (bss->supp_rates[i] & 0x7f) * 5; + for (j = 0; j < sband->n_bitrates; j++) + if (sband->bitrates[j].bitrate == bitrate) + rates |= BIT(j); } + ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; + + ieee80211_sta_def_wmm_params(dev, bss, 1); ifsta->state = IEEE80211_IBSS_JOINED; mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); @@ -3333,7 +3289,7 @@ static void ieee80211_mesh_housekeeping(struct net_device *dev, free_plinks = mesh_plink_availables(sdata); if (free_plinks != sdata->u.sta.accepting_plinks) - ieee80211_if_config_beacon(dev); + ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); mod_timer(&ifsta->timer, jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL); @@ -3757,28 +3713,45 @@ int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_if_sta *ifsta; + int res; if (len > IEEE80211_MAX_SSID_LEN) return -EINVAL; ifsta = &sdata->u.sta; - if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) + if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { + memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); + memcpy(ifsta->ssid, ssid, len); + ifsta->ssid_len = len; ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; - memcpy(ifsta->ssid, ssid, len); - memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); - ifsta->ssid_len = len; + + res = 0; + /* + * Hack! MLME code needs to be cleaned up to have different + * entry points for configuration and internal selection change + */ + if (netif_running(sdata->dev)) + res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID); + if (res) { + printk(KERN_DEBUG "%s: Failed to config new SSID to " + "the low-level driver\n", dev->name); + return res; + } + } if (len) ifsta->flags |= IEEE80211_STA_SSID_SET; else ifsta->flags &= ~IEEE80211_STA_SSID_SET; + if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { ifsta->ibss_join_req = jiffies; ifsta->state = IEEE80211_IBSS_SEARCH; return ieee80211_sta_find_ibss(dev, ifsta); } + return 0; } @@ -3804,7 +3777,12 @@ int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { memcpy(ifsta->bssid, bssid, ETH_ALEN); - res = ieee80211_if_config(dev); + res = 0; + /* + * Hack! See also ieee80211_sta_set_ssid. + */ + if (netif_running(sdata->dev)) + res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); if (res) { printk(KERN_DEBUG "%s: Failed to config new BSSID to " "the low-level driver\n", dev->name); -- cgit v1.2.3