diff options
| author | Thomas Pedersen <thomas@cozybit.com> | 2011-10-26 14:47:25 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-11-08 15:54:31 -0500 |
| commit | 3b69a9c5f264d62a0cf46ea61ed3da732c1f88c2 (patch) | |
| tree | d40bbdbe62b517696711344e6f56278ac420cdd1 /net/mac80211/tx.c | |
| parent | c63749d347afcb5c4790d1cbe27d9b66e585b9ff (diff) | |
mac80211: comment allocation of mesh frames
Remove most references to magic numbers, save a few bytes and hopefully
improve readability.
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/tx.c')
| -rw-r--r-- | net/mac80211/tx.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 48bbb96d8ed..f4dd339e7cd 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2278,22 +2278,29 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, } else if (ieee80211_vif_is_mesh(&sdata->vif)) { struct ieee80211_mgmt *mgmt; u8 *pos; + int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + + sizeof(mgmt->u.beacon); #ifdef CONFIG_MAC80211_MESH if (!sdata->u.mesh.mesh_id_len) goto out; #endif - /* headroom, head length, tail length and maximum TIM length */ - skb = dev_alloc_skb(local->tx_headroom + 400 + - sdata->u.mesh.ie_len); + skb = dev_alloc_skb(local->tx_headroom + + hdr_len + + 2 + /* NULL SSID */ + 2 + 8 + /* supported rates */ + 2 + 3 + /* DS params */ + 2 + (IEEE80211_MAX_SUPP_RATES - 8) + + 2 + sdata->u.mesh.mesh_id_len + + 2 + sizeof(struct ieee80211_meshconf_ie) + + sdata->u.mesh.ie_len); if (!skb) goto out; 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 = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); + memset(mgmt, 0, hdr_len); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON); memset(mgmt->da, 0xff, ETH_ALEN); |