summaryrefslogtreecommitdiff
path: root/package/madwifi/patches/440-wme_cleanup.patch
blob: bb81ac7f81622b5bf453a3ae71884942fe8ffdee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
--- a/net80211/ieee80211_output.c
+++ b/net80211/ieee80211_output.c
@@ -73,6 +73,29 @@ doprint(struct ieee80211vap *vap, int su
 }
 #endif
 
+static const int ieee802_1d_to_ac[8] = {
+	WME_AC_BE, WME_AC_BK, WME_AC_BK, WME_AC_BE,
+	WME_AC_VI, WME_AC_VI, WME_AC_VO, WME_AC_VO
+};
+
+/* Given a data frame determine the 802.1p/1d tag to use. */
+static unsigned int ieee80211_classify_ip(struct sk_buff *skb)
+{
+	const struct ether_header *eh = (struct ether_header *) skb->data;
+	const struct iphdr *ip = (struct iphdr *)
+			(skb->data + sizeof (struct ether_header));
+	unsigned int dscp;
+
+	switch (skb->protocol) {
+	case __constant_htons(ETH_P_IP):
+		dscp = ip->tos & 0xfc;
+		break;
+	default:
+		return 0;
+	}
+
+	return dscp >> 5;
+}
 
 /*
  * Determine the priority based on VLAN and/or IP TOS. Priority is
@@ -83,90 +106,24 @@ static int
 ieee80211_classify(struct ieee80211_node *ni, struct sk_buff *skb)
 {
 	struct ieee80211vap *vap = ni->ni_vap;
-	struct ether_header *eh = (struct ether_header *) skb->data;
-	int v_wme_ac = 0, d_wme_ac = 0;
 
-	/* default priority */
-	skb->priority = WME_AC_BE;
-
-	if (!(ni->ni_flags & IEEE80211_NODE_QOS))
-		return 0;
-
-	/* 
-	 * If node has a vlan tag then all traffic
-	 * to it must have a matching vlan id.
+	/* skb->priority values from 256->263 are magic values to
+	 * directly indicate a specific 802.1d priority.  This is used
+	 * to allow 802.1d priority to be passed directly in from VLAN
+	 * tags, etc.
 	 */
-	if (ni->ni_vlan != 0 && vlan_tx_tag_present(skb)) {
-		u_int32_t tag=0;
-		int v_pri;
-
-		if (vap->iv_vlgrp == NULL) {
-			IEEE80211_NODE_STAT(ni, tx_novlantag);
-			ni->ni_stats.ns_tx_novlantag++;
-			return 1;
-		}
-		if (((tag = vlan_tx_tag_get(skb)) & VLAN_VID_MASK) !=
-		    (ni->ni_vlan & VLAN_VID_MASK)) {
-			IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
-			ni->ni_stats.ns_tx_vlanmismatch++;
-			return 1;
-		}
-		if (ni->ni_flags & IEEE80211_NODE_QOS) {
-			v_pri = (tag >> VLAN_PRI_SHIFT) & VLAN_PRI_MASK;
-			switch (v_pri) {
-			case 1:
-			case 2:		/* Background (BK) */
-				v_wme_ac = WME_AC_BK;
-				break;
-			case 0:
-			case 3:		/* Best Effort (BE) */
-				v_wme_ac = WME_AC_BE;
-				break;
-			case 4:
-			case 5:		/* Video (VI) */
-				v_wme_ac = WME_AC_VI;
-				break;
-			case 6:
-			case 7:		/* Voice (VO) */
-				v_wme_ac = WME_AC_VO;
-				break;
-			}
-		}
+	if (skb->priority >= 256 && skb->priority <= 263) {
+		skb->priority = ieee802_1d_to_ac[skb->priority - 256];
+		return 0;
 	}
 
-	if (eh->ether_type == __constant_htons(ETHERTYPE_IP)) {
-		const struct iphdr *ip = (struct iphdr *)
-			(skb->data + sizeof (struct ether_header));
-		/*
-		 * IP frame, map the TOS field.
-		 *
-		 * XXX: fill out these mappings???
-		 */
-		switch (ip->tos) {
-		case 0x08:				/* Background */
-		case 0x20:
-			d_wme_ac = WME_AC_BK;
-			break;
-		case 0x28:				/* Video */
-		case 0xa0:
-			d_wme_ac = WME_AC_VI;
-			break;
-		case 0x30:				/* Voice */
-		case 0xe0:
-		case 0x88:				/* XXX UPSD */
-		case 0xb8:
-			d_wme_ac = WME_AC_VO;
-			break;
-		default:				/* All others */
-			d_wme_ac = WME_AC_BE;
-			break;
-		}
-	} else {
-		d_wme_ac = WME_AC_BE;
+	if (!(ni->ni_flags & IEEE80211_NODE_QOS)) {
+		/* default priority */
+		skb->priority = WME_AC_BE;
+		return 0;
 	}
-	skb->priority = d_wme_ac;
-	if (v_wme_ac > d_wme_ac)
-		skb->priority = v_wme_ac;
+
+	skb->priority = ieee802_1d_to_ac[ieee80211_classify_ip(skb)];
 
 	/* Applying ACM policy */
 	if (vap->iv_opmode == IEEE80211_M_STA) {