package/madwifi/patches/440-wme_cleanup.patch

   1 --- a/net80211/ieee80211_output.c
   2 +++ b/net80211/ieee80211_output.c
   3 @@ -73,6 +73,29 @@ doprint(struct ieee80211vap *vap, int su
   4  }
   5  #endif
   6
   7 +static const int ieee802_1d_to_ac[8] = {
   8 +       WME_AC_BE, WME_AC_BK, WME_AC_BK, WME_AC_BE,
   9 +       WME_AC_VI, WME_AC_VI, WME_AC_VO, WME_AC_VO
  10 +};
  11 +
  12 +/* Given a data frame determine the 802.1p/1d tag to use. */
  13 +static unsigned int ieee80211_classify_ip(struct sk_buff *skb)
  14 +{
  15 +       const struct ether_header *eh = (struct ether_header *) skb->data;
  16 +       const struct iphdr *ip = (struct iphdr *)
  17 +                       (skb->data + sizeof (struct ether_header));
  18 +       unsigned int dscp;
  19 +
  20 +       switch (skb->protocol) {
  21 +       case __constant_htons(ETH_P_IP):
  22 +               dscp = ip->tos & 0xfc;
  23 +               break;
  24 +       default:
  25 +               return 0;
  26 +       }
  27 +
  28 +       return dscp >> 5;
  29 +}
  30
  31  /*
  32   * Determine the priority based on VLAN and/or IP TOS. Priority is
  33 @@ -83,90 +106,24 @@ static int
  34  ieee80211_classify(struct ieee80211_node *ni, struct sk_buff *skb)
  35  {
  36         struct ieee80211vap *vap = ni->ni_vap;
  37 -       struct ether_header *eh = (struct ether_header *) skb->data;
  38 -       int v_wme_ac = 0, d_wme_ac = 0;
  39 -
  40 -       /* default priority */
  41 -       skb->priority = WME_AC_BE;
  42 -
  43 -       if (!(ni->ni_flags & IEEE80211_NODE_QOS))
  44 -               return 0;
  45
  46 -       /*
  47 -        * If node has a vlan tag then all traffic
  48 -        * to it must have a matching vlan id.
  49 +       /* skb->priority values from 256->263 are magic values to
  50 +        * directly indicate a specific 802.1d priority.  This is used
  51 +        * to allow 802.1d priority to be passed directly in from VLAN
  52 +        * tags, etc.
  53          */
  54 -       if (ni->ni_vlan != 0 && vlan_tx_tag_present(skb)) {
  55 -               u_int32_t tag=0;
  56 -               int v_pri;
  57 -
  58 -               if (vap->iv_vlgrp == NULL) {
  59 -                       IEEE80211_NODE_STAT(ni, tx_novlantag);
  60 -                       ni->ni_stats.ns_tx_novlantag++;
  61 -                       return 1;
  62 -               }
  63 -               if (((tag = vlan_tx_tag_get(skb)) & VLAN_VID_MASK) !=
  64 -                   (ni->ni_vlan & VLAN_VID_MASK)) {
  65 -                       IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
  66 -                       ni->ni_stats.ns_tx_vlanmismatch++;
  67 -                       return 1;
  68 -               }
  69 -               if (ni->ni_flags & IEEE80211_NODE_QOS) {
  70 -                       v_pri = (tag >> VLAN_PRI_SHIFT) & VLAN_PRI_MASK;
  71 -                       switch (v_pri) {
  72 -                       case 1:
  73 -                       case 2:         /* Background (BK) */
  74 -                               v_wme_ac = WME_AC_BK;
  75 -                               break;
  76 -                       case 0:
  77 -                       case 3:         /* Best Effort (BE) */
  78 -                               v_wme_ac = WME_AC_BE;
  79 -                               break;
  80 -                       case 4:
  81 -                       case 5:         /* Video (VI) */
  82 -                               v_wme_ac = WME_AC_VI;
  83 -                               break;
  84 -                       case 6:
  85 -                       case 7:         /* Voice (VO) */
  86 -                               v_wme_ac = WME_AC_VO;
  87 -                               break;
  88 -                       }
  89 -               }
  90 +       if (skb->priority >= 256 && skb->priority <= 263) {
  91 +               skb->priority = ieee802_1d_to_ac[skb->priority - 256];
  92 +               return 0;
  93         }
  94
  95 -       if (eh->ether_type == __constant_htons(ETHERTYPE_IP)) {
  96 -               const struct iphdr *ip = (struct iphdr *)
  97 -                       (skb->data + sizeof (struct ether_header));
  98 -               /*
  99 -                * IP frame, map the TOS field.
 100 -                *
 101 -                * XXX: fill out these mappings???
 102 -                */
 103 -               switch (ip->tos) {
 104 -               case 0x08:                              /* Background */
 105 -               case 0x20:
 106 -                       d_wme_ac = WME_AC_BK;
 107 -                       break;
 108 -               case 0x28:                              /* Video */
 109 -               case 0xa0:
 110 -                       d_wme_ac = WME_AC_VI;
 111 -                       break;
 112 -               case 0x30:                              /* Voice */
 113 -               case 0xe0:
 114 -               case 0x88:                              /* XXX UPSD */
 115 -               case 0xb8:
 116 -                       d_wme_ac = WME_AC_VO;
 117 -                       break;
 118 -               default:                                /* All others */
 119 -                       d_wme_ac = WME_AC_BE;
 120 -                       break;
 121 -               }
 122 -       } else {
 123 -               d_wme_ac = WME_AC_BE;
 124 +       if (!(ni->ni_flags & IEEE80211_NODE_QOS)) {
 125 +               /* default priority */
 126 +               skb->priority = WME_AC_BE;
 127 +               return 0;
 128         }
 129 -       skb->priority = d_wme_ac;
 130 -       if (v_wme_ac > d_wme_ac)
 131 -               skb->priority = v_wme_ac;
 132 +
 133 +       skb->priority = ieee802_1d_to_ac[ieee80211_classify_ip(skb)];
 134
 135         /* Applying ACM policy */
 136         if (vap->iv_opmode == IEEE80211_M_STA) {