1/*-
2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27#ifdef __FreeBSD__
| 1/*-
2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27#ifdef __FreeBSD__
|
28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_ht.c 222683 2011-06-04 15:05:32Z bschmidt $");
| 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_ht.c 223331 2011-06-20 11:46:03Z adrian $");
|
29#endif
30
31/*
32 * IEEE 802.11n protocol support.
33 */
34
35#include "opt_inet.h"
36#include "opt_wlan.h"
37
38#include <sys/param.h>
39#include <sys/kernel.h>
40#include <sys/systm.h>
41#include <sys/endian.h>
42
43#include <sys/socket.h>
44
45#include <net/if.h>
46#include <net/if_media.h>
47#include <net/ethernet.h>
48
49#include <net80211/ieee80211_var.h>
50#include <net80211/ieee80211_action.h>
51#include <net80211/ieee80211_input.h>
52
53/* define here, used throughout file */
54#define MS(_v, _f) (((_v) & _f) >> _f##_S)
55#define SM(_v, _f) (((_v) << _f##_S) & _f)
56
57const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = {
58 { 13, 14, 27, 30 }, /* MCS 0 */
59 { 26, 29, 54, 60 }, /* MCS 1 */
60 { 39, 43, 81, 90 }, /* MCS 2 */
61 { 52, 58, 108, 120 }, /* MCS 3 */
62 { 78, 87, 162, 180 }, /* MCS 4 */
63 { 104, 116, 216, 240 }, /* MCS 5 */
64 { 117, 130, 243, 270 }, /* MCS 6 */
65 { 130, 144, 270, 300 }, /* MCS 7 */
66 { 26, 29, 54, 60 }, /* MCS 8 */
67 { 52, 58, 108, 120 }, /* MCS 9 */
68 { 78, 87, 162, 180 }, /* MCS 10 */
69 { 104, 116, 216, 240 }, /* MCS 11 */
70 { 156, 173, 324, 360 }, /* MCS 12 */
71 { 208, 231, 432, 480 }, /* MCS 13 */
72 { 234, 260, 486, 540 }, /* MCS 14 */
73 { 260, 289, 540, 600 }, /* MCS 15 */
74 { 39, 43, 81, 90 }, /* MCS 16 */
75 { 78, 87, 162, 180 }, /* MCS 17 */
76 { 117, 130, 243, 270 }, /* MCS 18 */
77 { 156, 173, 324, 360 }, /* MCS 19 */
78 { 234, 260, 486, 540 }, /* MCS 20 */
79 { 312, 347, 648, 720 }, /* MCS 21 */
80 { 351, 390, 729, 810 }, /* MCS 22 */
81 { 390, 433, 810, 900 }, /* MCS 23 */
82 { 52, 58, 108, 120 }, /* MCS 24 */
83 { 104, 116, 216, 240 }, /* MCS 25 */
84 { 156, 173, 324, 360 }, /* MCS 26 */
85 { 208, 231, 432, 480 }, /* MCS 27 */
86 { 312, 347, 648, 720 }, /* MCS 28 */
87 { 416, 462, 864, 960 }, /* MCS 29 */
88 { 468, 520, 972, 1080 }, /* MCS 30 */
89 { 520, 578, 1080, 1200 }, /* MCS 31 */
90 { 0, 0, 12, 13 }, /* MCS 32 */
91 { 78, 87, 162, 180 }, /* MCS 33 */
92 { 104, 116, 216, 240 }, /* MCS 34 */
93 { 130, 144, 270, 300 }, /* MCS 35 */
94 { 117, 130, 243, 270 }, /* MCS 36 */
95 { 156, 173, 324, 360 }, /* MCS 37 */
96 { 195, 217, 405, 450 }, /* MCS 38 */
97 { 104, 116, 216, 240 }, /* MCS 39 */
98 { 130, 144, 270, 300 }, /* MCS 40 */
99 { 130, 144, 270, 300 }, /* MCS 41 */
100 { 156, 173, 324, 360 }, /* MCS 42 */
101 { 182, 202, 378, 420 }, /* MCS 43 */
102 { 182, 202, 378, 420 }, /* MCS 44 */
103 { 208, 231, 432, 480 }, /* MCS 45 */
104 { 156, 173, 324, 360 }, /* MCS 46 */
105 { 195, 217, 405, 450 }, /* MCS 47 */
106 { 195, 217, 405, 450 }, /* MCS 48 */
107 { 234, 260, 486, 540 }, /* MCS 49 */
108 { 273, 303, 567, 630 }, /* MCS 50 */
109 { 273, 303, 567, 630 }, /* MCS 51 */
110 { 312, 347, 648, 720 }, /* MCS 52 */
111 { 130, 144, 270, 300 }, /* MCS 53 */
112 { 156, 173, 324, 360 }, /* MCS 54 */
113 { 182, 202, 378, 420 }, /* MCS 55 */
114 { 156, 173, 324, 360 }, /* MCS 56 */
115 { 182, 202, 378, 420 }, /* MCS 57 */
116 { 208, 231, 432, 480 }, /* MCS 58 */
117 { 234, 260, 486, 540 }, /* MCS 59 */
118 { 208, 231, 432, 480 }, /* MCS 60 */
119 { 234, 260, 486, 540 }, /* MCS 61 */
120 { 260, 289, 540, 600 }, /* MCS 62 */
121 { 260, 289, 540, 600 }, /* MCS 63 */
122 { 286, 318, 594, 660 }, /* MCS 64 */
123 { 195, 217, 405, 450 }, /* MCS 65 */
124 { 234, 260, 486, 540 }, /* MCS 66 */
125 { 273, 303, 567, 630 }, /* MCS 67 */
126 { 234, 260, 486, 540 }, /* MCS 68 */
127 { 273, 303, 567, 630 }, /* MCS 69 */
128 { 312, 347, 648, 720 }, /* MCS 70 */
129 { 351, 390, 729, 810 }, /* MCS 71 */
130 { 312, 347, 648, 720 }, /* MCS 72 */
131 { 351, 390, 729, 810 }, /* MCS 73 */
132 { 390, 433, 810, 900 }, /* MCS 74 */
133 { 390, 433, 810, 900 }, /* MCS 75 */
134 { 429, 477, 891, 990 }, /* MCS 76 */
135};
136
137#ifdef IEEE80211_AMPDU_AGE
138static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */
139SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW,
140 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I",
141 "AMPDU max reorder age (ms)");
142#endif
143
144static int ieee80211_recv_bar_ena = 1;
145SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena,
146 0, "BAR frame processing (ena/dis)");
147
148static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */
149SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW,
150 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I",
151 "ADDBA request timeout (ms)");
152static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */
153SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW,
154 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I",
155 "ADDBA request backoff (ms)");
156static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */
157SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLTYPE_INT | CTLFLAG_RW,
158 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff");
159
160static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */
161static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */
162
163static ieee80211_recv_action_func ht_recv_action_ba_addba_request;
164static ieee80211_recv_action_func ht_recv_action_ba_addba_response;
165static ieee80211_recv_action_func ht_recv_action_ba_delba;
166static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave;
167static ieee80211_recv_action_func ht_recv_action_ht_txchwidth;
168
169static ieee80211_send_action_func ht_send_action_ba_addba;
170static ieee80211_send_action_func ht_send_action_ba_delba;
171static ieee80211_send_action_func ht_send_action_ht_txchwidth;
172
173static void
174ieee80211_ht_init(void)
175{
176 /*
177 * Setup HT parameters that depends on the clock frequency.
178 */
179#ifdef IEEE80211_AMPDU_AGE
180 ieee80211_ampdu_age = msecs_to_ticks(500);
181#endif
182 ieee80211_addba_timeout = msecs_to_ticks(250);
183 ieee80211_addba_backoff = msecs_to_ticks(10*1000);
184 ieee80211_bar_timeout = msecs_to_ticks(250);
185 /*
186 * Register action frame handlers.
187 */
188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
189 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request);
190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
191 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response);
192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
193 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba);
194 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
195 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave);
196 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
197 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth);
198
199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
200 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba);
201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
202 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba);
203 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
204 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba);
205 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT,
206 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth);
207}
208SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL);
209
210static int ieee80211_ampdu_enable(struct ieee80211_node *ni,
211 struct ieee80211_tx_ampdu *tap);
212static int ieee80211_addba_request(struct ieee80211_node *ni,
213 struct ieee80211_tx_ampdu *tap,
214 int dialogtoken, int baparamset, int batimeout);
215static int ieee80211_addba_response(struct ieee80211_node *ni,
216 struct ieee80211_tx_ampdu *tap,
217 int code, int baparamset, int batimeout);
218static void ieee80211_addba_stop(struct ieee80211_node *ni,
219 struct ieee80211_tx_ampdu *tap);
| 29#endif
30
31/*
32 * IEEE 802.11n protocol support.
33 */
34
35#include "opt_inet.h"
36#include "opt_wlan.h"
37
38#include <sys/param.h>
39#include <sys/kernel.h>
40#include <sys/systm.h>
41#include <sys/endian.h>
42
43#include <sys/socket.h>
44
45#include <net/if.h>
46#include <net/if_media.h>
47#include <net/ethernet.h>
48
49#include <net80211/ieee80211_var.h>
50#include <net80211/ieee80211_action.h>
51#include <net80211/ieee80211_input.h>
52
53/* define here, used throughout file */
54#define MS(_v, _f) (((_v) & _f) >> _f##_S)
55#define SM(_v, _f) (((_v) << _f##_S) & _f)
56
57const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = {
58 { 13, 14, 27, 30 }, /* MCS 0 */
59 { 26, 29, 54, 60 }, /* MCS 1 */
60 { 39, 43, 81, 90 }, /* MCS 2 */
61 { 52, 58, 108, 120 }, /* MCS 3 */
62 { 78, 87, 162, 180 }, /* MCS 4 */
63 { 104, 116, 216, 240 }, /* MCS 5 */
64 { 117, 130, 243, 270 }, /* MCS 6 */
65 { 130, 144, 270, 300 }, /* MCS 7 */
66 { 26, 29, 54, 60 }, /* MCS 8 */
67 { 52, 58, 108, 120 }, /* MCS 9 */
68 { 78, 87, 162, 180 }, /* MCS 10 */
69 { 104, 116, 216, 240 }, /* MCS 11 */
70 { 156, 173, 324, 360 }, /* MCS 12 */
71 { 208, 231, 432, 480 }, /* MCS 13 */
72 { 234, 260, 486, 540 }, /* MCS 14 */
73 { 260, 289, 540, 600 }, /* MCS 15 */
74 { 39, 43, 81, 90 }, /* MCS 16 */
75 { 78, 87, 162, 180 }, /* MCS 17 */
76 { 117, 130, 243, 270 }, /* MCS 18 */
77 { 156, 173, 324, 360 }, /* MCS 19 */
78 { 234, 260, 486, 540 }, /* MCS 20 */
79 { 312, 347, 648, 720 }, /* MCS 21 */
80 { 351, 390, 729, 810 }, /* MCS 22 */
81 { 390, 433, 810, 900 }, /* MCS 23 */
82 { 52, 58, 108, 120 }, /* MCS 24 */
83 { 104, 116, 216, 240 }, /* MCS 25 */
84 { 156, 173, 324, 360 }, /* MCS 26 */
85 { 208, 231, 432, 480 }, /* MCS 27 */
86 { 312, 347, 648, 720 }, /* MCS 28 */
87 { 416, 462, 864, 960 }, /* MCS 29 */
88 { 468, 520, 972, 1080 }, /* MCS 30 */
89 { 520, 578, 1080, 1200 }, /* MCS 31 */
90 { 0, 0, 12, 13 }, /* MCS 32 */
91 { 78, 87, 162, 180 }, /* MCS 33 */
92 { 104, 116, 216, 240 }, /* MCS 34 */
93 { 130, 144, 270, 300 }, /* MCS 35 */
94 { 117, 130, 243, 270 }, /* MCS 36 */
95 { 156, 173, 324, 360 }, /* MCS 37 */
96 { 195, 217, 405, 450 }, /* MCS 38 */
97 { 104, 116, 216, 240 }, /* MCS 39 */
98 { 130, 144, 270, 300 }, /* MCS 40 */
99 { 130, 144, 270, 300 }, /* MCS 41 */
100 { 156, 173, 324, 360 }, /* MCS 42 */
101 { 182, 202, 378, 420 }, /* MCS 43 */
102 { 182, 202, 378, 420 }, /* MCS 44 */
103 { 208, 231, 432, 480 }, /* MCS 45 */
104 { 156, 173, 324, 360 }, /* MCS 46 */
105 { 195, 217, 405, 450 }, /* MCS 47 */
106 { 195, 217, 405, 450 }, /* MCS 48 */
107 { 234, 260, 486, 540 }, /* MCS 49 */
108 { 273, 303, 567, 630 }, /* MCS 50 */
109 { 273, 303, 567, 630 }, /* MCS 51 */
110 { 312, 347, 648, 720 }, /* MCS 52 */
111 { 130, 144, 270, 300 }, /* MCS 53 */
112 { 156, 173, 324, 360 }, /* MCS 54 */
113 { 182, 202, 378, 420 }, /* MCS 55 */
114 { 156, 173, 324, 360 }, /* MCS 56 */
115 { 182, 202, 378, 420 }, /* MCS 57 */
116 { 208, 231, 432, 480 }, /* MCS 58 */
117 { 234, 260, 486, 540 }, /* MCS 59 */
118 { 208, 231, 432, 480 }, /* MCS 60 */
119 { 234, 260, 486, 540 }, /* MCS 61 */
120 { 260, 289, 540, 600 }, /* MCS 62 */
121 { 260, 289, 540, 600 }, /* MCS 63 */
122 { 286, 318, 594, 660 }, /* MCS 64 */
123 { 195, 217, 405, 450 }, /* MCS 65 */
124 { 234, 260, 486, 540 }, /* MCS 66 */
125 { 273, 303, 567, 630 }, /* MCS 67 */
126 { 234, 260, 486, 540 }, /* MCS 68 */
127 { 273, 303, 567, 630 }, /* MCS 69 */
128 { 312, 347, 648, 720 }, /* MCS 70 */
129 { 351, 390, 729, 810 }, /* MCS 71 */
130 { 312, 347, 648, 720 }, /* MCS 72 */
131 { 351, 390, 729, 810 }, /* MCS 73 */
132 { 390, 433, 810, 900 }, /* MCS 74 */
133 { 390, 433, 810, 900 }, /* MCS 75 */
134 { 429, 477, 891, 990 }, /* MCS 76 */
135};
136
137#ifdef IEEE80211_AMPDU_AGE
138static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */
139SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW,
140 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I",
141 "AMPDU max reorder age (ms)");
142#endif
143
144static int ieee80211_recv_bar_ena = 1;
145SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena,
146 0, "BAR frame processing (ena/dis)");
147
148static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */
149SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW,
150 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I",
151 "ADDBA request timeout (ms)");
152static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */
153SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW,
154 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I",
155 "ADDBA request backoff (ms)");
156static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */
157SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLTYPE_INT | CTLFLAG_RW,
158 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff");
159
160static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */
161static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */
162
163static ieee80211_recv_action_func ht_recv_action_ba_addba_request;
164static ieee80211_recv_action_func ht_recv_action_ba_addba_response;
165static ieee80211_recv_action_func ht_recv_action_ba_delba;
166static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave;
167static ieee80211_recv_action_func ht_recv_action_ht_txchwidth;
168
169static ieee80211_send_action_func ht_send_action_ba_addba;
170static ieee80211_send_action_func ht_send_action_ba_delba;
171static ieee80211_send_action_func ht_send_action_ht_txchwidth;
172
173static void
174ieee80211_ht_init(void)
175{
176 /*
177 * Setup HT parameters that depends on the clock frequency.
178 */
179#ifdef IEEE80211_AMPDU_AGE
180 ieee80211_ampdu_age = msecs_to_ticks(500);
181#endif
182 ieee80211_addba_timeout = msecs_to_ticks(250);
183 ieee80211_addba_backoff = msecs_to_ticks(10*1000);
184 ieee80211_bar_timeout = msecs_to_ticks(250);
185 /*
186 * Register action frame handlers.
187 */
188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
189 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request);
190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
191 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response);
192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
193 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba);
194 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
195 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave);
196 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
197 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth);
198
199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
200 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba);
201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
202 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba);
203 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
204 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba);
205 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT,
206 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth);
207}
208SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL);
209
210static int ieee80211_ampdu_enable(struct ieee80211_node *ni,
211 struct ieee80211_tx_ampdu *tap);
212static int ieee80211_addba_request(struct ieee80211_node *ni,
213 struct ieee80211_tx_ampdu *tap,
214 int dialogtoken, int baparamset, int batimeout);
215static int ieee80211_addba_response(struct ieee80211_node *ni,
216 struct ieee80211_tx_ampdu *tap,
217 int code, int baparamset, int batimeout);
218static void ieee80211_addba_stop(struct ieee80211_node *ni,
219 struct ieee80211_tx_ampdu *tap);
|
| 220static void null_addba_response_timeout(struct ieee80211_node *ni,
221 struct ieee80211_tx_ampdu *tap);
222
|
220static void ieee80211_bar_response(struct ieee80211_node *ni,
221 struct ieee80211_tx_ampdu *tap, int status);
222static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap);
223static void bar_stop_timer(struct ieee80211_tx_ampdu *tap);
224static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *,
225 int baparamset, int batimeout, int baseqctl);
226static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *);
227
228void
229ieee80211_ht_attach(struct ieee80211com *ic)
230{
231 /* setup default aggregation policy */
232 ic->ic_recv_action = ieee80211_recv_action;
233 ic->ic_send_action = ieee80211_send_action;
234 ic->ic_ampdu_enable = ieee80211_ampdu_enable;
235 ic->ic_addba_request = ieee80211_addba_request;
236 ic->ic_addba_response = ieee80211_addba_response;
| 223static void ieee80211_bar_response(struct ieee80211_node *ni,
224 struct ieee80211_tx_ampdu *tap, int status);
225static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap);
226static void bar_stop_timer(struct ieee80211_tx_ampdu *tap);
227static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *,
228 int baparamset, int batimeout, int baseqctl);
229static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *);
230
231void
232ieee80211_ht_attach(struct ieee80211com *ic)
233{
234 /* setup default aggregation policy */
235 ic->ic_recv_action = ieee80211_recv_action;
236 ic->ic_send_action = ieee80211_send_action;
237 ic->ic_ampdu_enable = ieee80211_ampdu_enable;
238 ic->ic_addba_request = ieee80211_addba_request;
239 ic->ic_addba_response = ieee80211_addba_response;
|
| 240 ic->ic_addba_response_timeout = null_addba_response_timeout;
|
237 ic->ic_addba_stop = ieee80211_addba_stop;
238 ic->ic_bar_response = ieee80211_bar_response;
239 ic->ic_ampdu_rx_start = ampdu_rx_start;
240 ic->ic_ampdu_rx_stop = ampdu_rx_stop;
241
242 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS;
243 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
244}
245
246void
247ieee80211_ht_detach(struct ieee80211com *ic)
248{
249}
250
251void
252ieee80211_ht_vattach(struct ieee80211vap *vap)
253{
254
255 /* driver can override defaults */
256 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K;
257 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA;
258 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax;
259 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU;
260 /* tx aggregation traffic thresholds */
261 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128;
262 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64;
263 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32;
264 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32;
265
266 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
267 /*
268 * Device is HT capable; enable all HT-related
269 * facilities by default.
270 * XXX these choices may be too aggressive.
271 */
272 vap->iv_flags_ht |= IEEE80211_FHT_HT
273 | IEEE80211_FHT_HTCOMPAT
274 ;
275 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20)
276 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20;
277 /* XXX infer from channel list? */
278 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
279 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40;
280 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40)
281 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40;
282 }
283 /* enable RIFS if capable */
284 if (vap->iv_htcaps & IEEE80211_HTC_RIFS)
285 vap->iv_flags_ht |= IEEE80211_FHT_RIFS;
286
287 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */
288 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX;
289 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU)
290 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX;
291 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX;
292 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU)
293 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX;
294 }
295 /* NB: disable default legacy WDS, too many issues right now */
296 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)
297 vap->iv_flags_ht &= ~IEEE80211_FHT_HT;
298}
299
300void
301ieee80211_ht_vdetach(struct ieee80211vap *vap)
302{
303}
304
305static int
306ht_getrate(struct ieee80211com *ic, int index, int mode, int ratetype)
307{
308 int mword, rate;
309
310 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode);
311 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS)
312 return (0);
313 switch (ratetype) {
314 case 0:
315 rate = ieee80211_htrates[index].ht20_rate_800ns;
316 break;
317 case 1:
318 rate = ieee80211_htrates[index].ht20_rate_400ns;
319 break;
320 case 2:
321 rate = ieee80211_htrates[index].ht40_rate_800ns;
322 break;
323 default:
324 rate = ieee80211_htrates[index].ht40_rate_400ns;
325 break;
326 }
327 return (rate);
328}
329
330static struct printranges {
331 int minmcs;
332 int maxmcs;
333 int txstream;
334 int ratetype;
335 int htcapflags;
336} ranges[] = {
337 { 0, 7, 1, 0, 0 },
338 { 8, 15, 2, 0, 0 },
339 { 16, 23, 3, 0, 0 },
340 { 24, 31, 4, 0, 0 },
341 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 },
342 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL },
343 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL },
344 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL },
345 { 0, 0, 0, 0, 0 },
346};
347
348static void
349ht_rateprint(struct ieee80211com *ic, int mode, int ratetype)
350{
351 struct ifnet *ifp = ic->ic_ifp;
352 int minrate, maxrate;
353 struct printranges *range;
354
355 for (range = ranges; range->txstream != 0; range++) {
356 if (ic->ic_txstream < range->txstream)
357 continue;
358 if (range->htcapflags &&
359 (ic->ic_htcaps & range->htcapflags) == 0)
360 continue;
361 if (ratetype < range->ratetype)
362 continue;
363 minrate = ht_getrate(ic, range->minmcs, mode, ratetype);
364 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype);
365 if (range->maxmcs) {
366 if_printf(ifp, "MCS %d-%d: %d%sMbps - %d%sMbps\n",
367 range->minmcs, range->maxmcs,
368 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""),
369 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : ""));
370 } else {
371 if_printf(ifp, "MCS %d: %d%sMbps\n", range->minmcs,
372 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""));
373 }
374 }
375}
376
377static void
378ht_announce(struct ieee80211com *ic, int mode)
379{
380 struct ifnet *ifp = ic->ic_ifp;
381 const char *modestr = ieee80211_phymode_name[mode];
382
383 if_printf(ifp, "%s MCS 20MHz\n", modestr);
384 ht_rateprint(ic, mode, 0);
385 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) {
386 if_printf(ifp, "%s MCS 20MHz SGI\n", modestr);
387 ht_rateprint(ic, mode, 1);
388 }
389 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
390 if_printf(ifp, "%s MCS 40MHz:\n", modestr);
391 ht_rateprint(ic, mode, 2);
392 }
393 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
394 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) {
395 if_printf(ifp, "%s MCS 40MHz SGI:\n", modestr);
396 ht_rateprint(ic, mode, 3);
397 }
398}
399
400void
401ieee80211_ht_announce(struct ieee80211com *ic)
402{
403 struct ifnet *ifp = ic->ic_ifp;
404
405 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
406 isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
407 if_printf(ifp, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream);
408 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA))
409 ht_announce(ic, IEEE80211_MODE_11NA);
410 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
411 ht_announce(ic, IEEE80211_MODE_11NG);
412}
413
414static struct ieee80211_htrateset htrateset;
415
416const struct ieee80211_htrateset *
417ieee80211_get_suphtrates(struct ieee80211com *ic,
418 const struct ieee80211_channel *c)
419{
420#define ADDRATE(x) do { \
421 htrateset.rs_rates[htrateset.rs_nrates] = x; \
422 htrateset.rs_nrates++; \
423} while (0)
424 int i;
425
426 memset(&htrateset, 0, sizeof(struct ieee80211_htrateset));
427 for (i = 0; i < ic->ic_txstream * 8; i++)
428 ADDRATE(i);
429 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
430 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32))
431 ADDRATE(i);
432 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
433 if (ic->ic_txstream >= 2) {
434 for (i = 33; i <= 38; i++)
435 ADDRATE(i);
436 }
437 if (ic->ic_txstream >= 3) {
438 for (i = 39; i <= 52; i++)
439 ADDRATE(i);
440 }
441 if (ic->ic_txstream == 4) {
442 for (i = 53; i <= 76; i++)
443 ADDRATE(i);
444 }
445 }
446 return &htrateset;
447#undef ADDRATE
448}
449
450/*
451 * Receive processing.
452 */
453
454/*
455 * Decap the encapsulated A-MSDU frames and dispatch all but
456 * the last for delivery. The last frame is returned for
457 * delivery via the normal path.
458 */
459struct mbuf *
460ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m)
461{
462 struct ieee80211vap *vap = ni->ni_vap;
463 int framelen;
464 struct mbuf *n;
465
466 /* discard 802.3 header inserted by ieee80211_decap */
467 m_adj(m, sizeof(struct ether_header));
468
469 vap->iv_stats.is_amsdu_decap++;
470
471 for (;;) {
472 /*
473 * Decap the first frame, bust it apart from the
474 * remainder and deliver. We leave the last frame
475 * delivery to the caller (for consistency with other
476 * code paths, could also do it here).
477 */
478 m = ieee80211_decap1(m, &framelen);
479 if (m == NULL) {
480 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
481 ni->ni_macaddr, "a-msdu", "%s", "decap failed");
482 vap->iv_stats.is_amsdu_tooshort++;
483 return NULL;
484 }
485 if (m->m_pkthdr.len == framelen)
486 break;
487 n = m_split(m, framelen, M_NOWAIT);
488 if (n == NULL) {
489 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
490 ni->ni_macaddr, "a-msdu",
491 "%s", "unable to split encapsulated frames");
492 vap->iv_stats.is_amsdu_split++;
493 m_freem(m); /* NB: must reclaim */
494 return NULL;
495 }
496 vap->iv_deliver_data(vap, ni, m);
497
498 /*
499 * Remove frame contents; each intermediate frame
500 * is required to be aligned to a 4-byte boundary.
501 */
502 m = n;
503 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */
504 }
505 return m; /* last delivered by caller */
506}
507
508/*
509 * Purge all frames in the A-MPDU re-order queue.
510 */
511static void
512ampdu_rx_purge(struct ieee80211_rx_ampdu *rap)
513{
514 struct mbuf *m;
515 int i;
516
517 for (i = 0; i < rap->rxa_wnd; i++) {
518 m = rap->rxa_m[i];
519 if (m != NULL) {
520 rap->rxa_m[i] = NULL;
521 rap->rxa_qbytes -= m->m_pkthdr.len;
522 m_freem(m);
523 if (--rap->rxa_qframes == 0)
524 break;
525 }
526 }
527 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0,
528 ("lost %u data, %u frames on ampdu rx q",
529 rap->rxa_qbytes, rap->rxa_qframes));
530}
531
532/*
533 * Start A-MPDU rx/re-order processing for the specified TID.
534 */
535static int
536ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap,
537 int baparamset, int batimeout, int baseqctl)
538{
539 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
540
541 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
542 /*
543 * AMPDU previously setup and not terminated with a DELBA,
544 * flush the reorder q's in case anything remains.
545 */
546 ampdu_rx_purge(rap);
547 }
548 memset(rap, 0, sizeof(*rap));
549 rap->rxa_wnd = (bufsiz == 0) ?
550 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
551 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START);
552 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
553
554 return 0;
555}
556
557/*
558 * Stop A-MPDU rx processing for the specified TID.
559 */
560static void
561ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
562{
563
564 ampdu_rx_purge(rap);
565 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND);
566}
567
568/*
569 * Dispatch a frame from the A-MPDU reorder queue. The
570 * frame is fed back into ieee80211_input marked with an
571 * M_AMPDU_MPDU flag so it doesn't come back to us (it also
572 * permits ieee80211_input to optimize re-processing).
573 */
574static __inline void
575ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m)
576{
577 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */
578 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */
579 (void) ieee80211_input(ni, m, 0, 0);
580}
581
582/*
583 * Dispatch as many frames as possible from the re-order queue.
584 * Frames will always be "at the front"; we process all frames
585 * up to the first empty slot in the window. On completion we
586 * cleanup state if there are still pending frames in the current
587 * BA window. We assume the frame at slot 0 is already handled
588 * by the caller; we always start at slot 1.
589 */
590static void
591ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni)
592{
593 struct ieee80211vap *vap = ni->ni_vap;
594 struct mbuf *m;
595 int i;
596
597 /* flush run of frames */
598 for (i = 1; i < rap->rxa_wnd; i++) {
599 m = rap->rxa_m[i];
600 if (m == NULL)
601 break;
602 rap->rxa_m[i] = NULL;
603 rap->rxa_qbytes -= m->m_pkthdr.len;
604 rap->rxa_qframes--;
605
606 ampdu_dispatch(ni, m);
607 }
608 /*
609 * If frames remain, copy the mbuf pointers down so
610 * they correspond to the offsets in the new window.
611 */
612 if (rap->rxa_qframes != 0) {
613 int n = rap->rxa_qframes, j;
614 for (j = i+1; j < rap->rxa_wnd; j++) {
615 if (rap->rxa_m[j] != NULL) {
616 rap->rxa_m[j-i] = rap->rxa_m[j];
617 rap->rxa_m[j] = NULL;
618 if (--n == 0)
619 break;
620 }
621 }
622 KASSERT(n == 0, ("lost %d frames", n));
623 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
624 }
625 /*
626 * Adjust the start of the BA window to
627 * reflect the frames just dispatched.
628 */
629 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i);
630 vap->iv_stats.is_ampdu_rx_oor += i;
631}
632
633#ifdef IEEE80211_AMPDU_AGE
634/*
635 * Dispatch all frames in the A-MPDU re-order queue.
636 */
637static void
638ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
639{
640 struct ieee80211vap *vap = ni->ni_vap;
641 struct mbuf *m;
642 int i;
643
644 for (i = 0; i < rap->rxa_wnd; i++) {
645 m = rap->rxa_m[i];
646 if (m == NULL)
647 continue;
648 rap->rxa_m[i] = NULL;
649 rap->rxa_qbytes -= m->m_pkthdr.len;
650 rap->rxa_qframes--;
651 vap->iv_stats.is_ampdu_rx_oor++;
652
653 ampdu_dispatch(ni, m);
654 if (rap->rxa_qframes == 0)
655 break;
656 }
657}
658#endif /* IEEE80211_AMPDU_AGE */
659
660/*
661 * Dispatch all frames in the A-MPDU re-order queue
662 * preceding the specified sequence number. This logic
663 * handles window moves due to a received MSDU or BAR.
664 */
665static void
666ampdu_rx_flush_upto(struct ieee80211_node *ni,
667 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart)
668{
669 struct ieee80211vap *vap = ni->ni_vap;
670 struct mbuf *m;
671 ieee80211_seq seqno;
672 int i;
673
674 /*
675 * Flush any complete MSDU's with a sequence number lower
676 * than winstart. Gaps may exist. Note that we may actually
677 * dispatch frames past winstart if a run continues; this is
678 * an optimization that avoids having to do a separate pass
679 * to dispatch frames after moving the BA window start.
680 */
681 seqno = rap->rxa_start;
682 for (i = 0; i < rap->rxa_wnd; i++) {
683 m = rap->rxa_m[i];
684 if (m != NULL) {
685 rap->rxa_m[i] = NULL;
686 rap->rxa_qbytes -= m->m_pkthdr.len;
687 rap->rxa_qframes--;
688 vap->iv_stats.is_ampdu_rx_oor++;
689
690 ampdu_dispatch(ni, m);
691 } else {
692 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart))
693 break;
694 }
695 seqno = IEEE80211_SEQ_INC(seqno);
696 }
697 /*
698 * If frames remain, copy the mbuf pointers down so
699 * they correspond to the offsets in the new window.
700 */
701 if (rap->rxa_qframes != 0) {
702 int n = rap->rxa_qframes, j;
703
704 /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */
705 KASSERT(rap->rxa_m[0] == NULL,
706 ("%s: BA window slot 0 occupied", __func__));
707 for (j = i+1; j < rap->rxa_wnd; j++) {
708 if (rap->rxa_m[j] != NULL) {
709 rap->rxa_m[j-i] = rap->rxa_m[j];
710 rap->rxa_m[j] = NULL;
711 if (--n == 0)
712 break;
713 }
714 }
715 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d "
716 "BA win <%d:%d> winstart %d",
717 __func__, n, rap->rxa_qframes, i, rap->rxa_start,
718 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
719 winstart));
720 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
721 }
722 /*
723 * Move the start of the BA window; we use the
724 * sequence number of the last MSDU that was
725 * passed up the stack+1 or winstart if stopped on
726 * a gap in the reorder buffer.
727 */
728 rap->rxa_start = seqno;
729}
730
731/*
732 * Process a received QoS data frame for an HT station. Handle
733 * A-MPDU reordering: if this frame is received out of order
734 * and falls within the BA window hold onto it. Otherwise if
735 * this frame completes a run, flush any pending frames. We
736 * return 1 if the frame is consumed. A 0 is returned if
737 * the frame should be processed normally by the caller.
738 */
739int
740ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m)
741{
742#define IEEE80211_FC0_QOSDATA \
743 (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0)
744#define PROCESS 0 /* caller should process frame */
745#define CONSUMED 1 /* frame consumed, caller does nothing */
746 struct ieee80211vap *vap = ni->ni_vap;
747 struct ieee80211_qosframe *wh;
748 struct ieee80211_rx_ampdu *rap;
749 ieee80211_seq rxseq;
750 uint8_t tid;
751 int off;
752
753 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU,
754 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags));
755 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
756
757 /* NB: m_len known to be sufficient */
758 wh = mtod(m, struct ieee80211_qosframe *);
759 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) {
760 /*
761 * Not QoS data, shouldn't get here but just
762 * return it to the caller for processing.
763 */
764 return PROCESS;
765 }
766 if (IEEE80211_IS_DSTODS(wh))
767 tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0];
768 else
769 tid = wh->i_qos[0];
770 tid &= IEEE80211_QOS_TID;
771 rap = &ni->ni_rx_ampdu[tid];
772 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
773 /*
774 * No ADDBA request yet, don't touch.
775 */
776 return PROCESS;
777 }
778 rxseq = le16toh(*(uint16_t *)wh->i_seq);
779 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) {
780 /*
781 * Fragments are not allowed; toss.
782 */
783 IEEE80211_DISCARD_MAC(vap,
784 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
785 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid,
786 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
787 vap->iv_stats.is_ampdu_rx_drop++;
788 IEEE80211_NODE_STAT(ni, rx_drop);
789 m_freem(m);
790 return CONSUMED;
791 }
792 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT;
793 rap->rxa_nframes++;
794again:
795 if (rxseq == rap->rxa_start) {
796 /*
797 * First frame in window.
798 */
799 if (rap->rxa_qframes != 0) {
800 /*
801 * Dispatch as many packets as we can.
802 */
803 KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup"));
804 ampdu_dispatch(ni, m);
805 ampdu_rx_dispatch(rap, ni);
806 return CONSUMED;
807 } else {
808 /*
809 * In order; advance window and notify
810 * caller to dispatch directly.
811 */
812 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
813 return PROCESS;
814 }
815 }
816 /*
817 * Frame is out of order; store if in the BA window.
818 */
819 /* calculate offset in BA window */
820 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
821 if (off < rap->rxa_wnd) {
822 /*
823 * Common case (hopefully): in the BA window.
824 * Sec 9.10.7.6.2 a) (p.137)
825 */
826#ifdef IEEE80211_AMPDU_AGE
827 /*
828 * Check for frames sitting too long in the reorder queue.
829 * This should only ever happen if frames are not delivered
830 * without the sender otherwise notifying us (e.g. with a
831 * BAR to move the window). Typically this happens because
832 * of vendor bugs that cause the sequence number to jump.
833 * When this happens we get a gap in the reorder queue that
834 * leaves frame sitting on the queue until they get pushed
835 * out due to window moves. When the vendor does not send
836 * BAR this move only happens due to explicit packet sends
837 *
838 * NB: we only track the time of the oldest frame in the
839 * reorder q; this means that if we flush we might push
840 * frames that still "new"; if this happens then subsequent
841 * frames will result in BA window moves which cost something
842 * but is still better than a big throughput dip.
843 */
844 if (rap->rxa_qframes != 0) {
845 /* XXX honor batimeout? */
846 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
847 /*
848 * Too long since we received the first
849 * frame; flush the reorder buffer.
850 */
851 if (rap->rxa_qframes != 0) {
852 vap->iv_stats.is_ampdu_rx_age +=
853 rap->rxa_qframes;
854 ampdu_rx_flush(ni, rap);
855 }
856 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
857 return PROCESS;
858 }
859 } else {
860 /*
861 * First frame, start aging timer.
862 */
863 rap->rxa_age = ticks;
864 }
865#endif /* IEEE80211_AMPDU_AGE */
866 /* save packet */
867 if (rap->rxa_m[off] == NULL) {
868 rap->rxa_m[off] = m;
869 rap->rxa_qframes++;
870 rap->rxa_qbytes += m->m_pkthdr.len;
871 vap->iv_stats.is_ampdu_rx_reorder++;
872 } else {
873 IEEE80211_DISCARD_MAC(vap,
874 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
875 ni->ni_macaddr, "a-mpdu duplicate",
876 "seqno %u tid %u BA win <%u:%u>",
877 rxseq, tid, rap->rxa_start,
878 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1));
879 vap->iv_stats.is_rx_dup++;
880 IEEE80211_NODE_STAT(ni, rx_dup);
881 m_freem(m);
882 }
883 return CONSUMED;
884 }
885 if (off < IEEE80211_SEQ_BA_RANGE) {
886 /*
887 * Outside the BA window, but within range;
888 * flush the reorder q and move the window.
889 * Sec 9.10.7.6.2 b) (p.138)
890 */
891 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
892 "move BA win <%u:%u> (%u frames) rxseq %u tid %u",
893 rap->rxa_start,
894 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
895 rap->rxa_qframes, rxseq, tid);
896 vap->iv_stats.is_ampdu_rx_move++;
897
898 /*
899 * The spec says to flush frames up to but not including:
900 * WinStart_B = rxseq - rap->rxa_wnd + 1
901 * Then insert the frame or notify the caller to process
902 * it immediately. We can safely do this by just starting
903 * over again because we know the frame will now be within
904 * the BA window.
905 */
906 /* NB: rxa_wnd known to be >0 */
907 ampdu_rx_flush_upto(ni, rap,
908 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1));
909 goto again;
910 } else {
911 /*
912 * Outside the BA window and out of range; toss.
913 * Sec 9.10.7.6.2 c) (p.138)
914 */
915 IEEE80211_DISCARD_MAC(vap,
916 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
917 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
918 rap->rxa_start,
919 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
920 rap->rxa_qframes, rxseq, tid,
921 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
922 vap->iv_stats.is_ampdu_rx_drop++;
923 IEEE80211_NODE_STAT(ni, rx_drop);
924 m_freem(m);
925 return CONSUMED;
926 }
927#undef CONSUMED
928#undef PROCESS
929#undef IEEE80211_FC0_QOSDATA
930}
931
932/*
933 * Process a BAR ctl frame. Dispatch all frames up to
934 * the sequence number of the frame. If this frame is
935 * out of range it's discarded.
936 */
937void
938ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0)
939{
940 struct ieee80211vap *vap = ni->ni_vap;
941 struct ieee80211_frame_bar *wh;
942 struct ieee80211_rx_ampdu *rap;
943 ieee80211_seq rxseq;
944 int tid, off;
945
946 if (!ieee80211_recv_bar_ena) {
947#if 0
948 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N,
949 ni->ni_macaddr, "BAR", "%s", "processing disabled");
950#endif
951 vap->iv_stats.is_ampdu_bar_bad++;
952 return;
953 }
954 wh = mtod(m0, struct ieee80211_frame_bar *);
955 /* XXX check basic BAR */
956 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID);
957 rap = &ni->ni_rx_ampdu[tid];
958 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
959 /*
960 * No ADDBA request yet, don't touch.
961 */
962 IEEE80211_DISCARD_MAC(vap,
963 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
964 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid);
965 vap->iv_stats.is_ampdu_bar_bad++;
966 return;
967 }
968 vap->iv_stats.is_ampdu_bar_rx++;
969 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
970 if (rxseq == rap->rxa_start)
971 return;
972 /* calculate offset in BA window */
973 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
974 if (off < IEEE80211_SEQ_BA_RANGE) {
975 /*
976 * Flush the reorder q up to rxseq and move the window.
977 * Sec 9.10.7.6.3 a) (p.138)
978 */
979 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
980 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u",
981 rap->rxa_start,
982 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
983 rap->rxa_qframes, rxseq, tid);
984 vap->iv_stats.is_ampdu_bar_move++;
985
986 ampdu_rx_flush_upto(ni, rap, rxseq);
987 if (off >= rap->rxa_wnd) {
988 /*
989 * BAR specifies a window start to the right of BA
990 * window; we must move it explicitly since
991 * ampdu_rx_flush_upto will not.
992 */
993 rap->rxa_start = rxseq;
994 }
995 } else {
996 /*
997 * Out of range; toss.
998 * Sec 9.10.7.6.3 b) (p.138)
999 */
1000 IEEE80211_DISCARD_MAC(vap,
1001 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1002 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1003 rap->rxa_start,
1004 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1005 rap->rxa_qframes, rxseq, tid,
1006 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1007 vap->iv_stats.is_ampdu_bar_oow++;
1008 IEEE80211_NODE_STAT(ni, rx_drop);
1009 }
1010}
1011
1012/*
1013 * Setup HT-specific state in a node. Called only
1014 * when HT use is negotiated so we don't do extra
1015 * work for temporary and/or legacy sta's.
1016 */
1017void
1018ieee80211_ht_node_init(struct ieee80211_node *ni)
1019{
1020 struct ieee80211_tx_ampdu *tap;
1021 int ac;
1022
1023 if (ni->ni_flags & IEEE80211_NODE_HT) {
1024 /*
1025 * Clean AMPDU state on re-associate. This handles the case
1026 * where a station leaves w/o notifying us and then returns
1027 * before node is reaped for inactivity.
1028 */
1029 ieee80211_ht_node_cleanup(ni);
1030 }
1031 for (ac = 0; ac < WME_NUM_AC; ac++) {
1032 tap = &ni->ni_tx_ampdu[ac];
1033 tap->txa_ac = ac;
1034 tap->txa_ni = ni;
1035 /* NB: further initialization deferred */
1036 }
1037 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1038}
1039
1040/*
1041 * Cleanup HT-specific state in a node. Called only
1042 * when HT use has been marked.
1043 */
1044void
1045ieee80211_ht_node_cleanup(struct ieee80211_node *ni)
1046{
1047 struct ieee80211com *ic = ni->ni_ic;
1048 int i;
1049
1050 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node"));
1051
1052 /* XXX optimize this */
1053 for (i = 0; i < WME_NUM_AC; i++) {
1054 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i];
1055 if (tap->txa_flags & IEEE80211_AGGR_SETUP)
1056 ampdu_tx_stop(tap);
1057 }
1058 for (i = 0; i < WME_NUM_TID; i++)
1059 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]);
1060
1061 ni->ni_htcap = 0;
1062 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL;
1063}
1064
1065/*
1066 * Age out HT resources for a station.
1067 */
1068void
1069ieee80211_ht_node_age(struct ieee80211_node *ni)
1070{
1071#ifdef IEEE80211_AMPDU_AGE
1072 struct ieee80211vap *vap = ni->ni_vap;
1073 uint8_t tid;
1074#endif
1075
1076 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1077
1078#ifdef IEEE80211_AMPDU_AGE
1079 for (tid = 0; tid < WME_NUM_TID; tid++) {
1080 struct ieee80211_rx_ampdu *rap;
1081
1082 rap = &ni->ni_rx_ampdu[tid];
1083 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0)
1084 continue;
1085 if (rap->rxa_qframes == 0)
1086 continue;
1087 /*
1088 * Check for frames sitting too long in the reorder queue.
1089 * See above for more details on what's happening here.
1090 */
1091 /* XXX honor batimeout? */
1092 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1093 /*
1094 * Too long since we received the first
1095 * frame; flush the reorder buffer.
1096 */
1097 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes;
1098 ampdu_rx_flush(ni, rap);
1099 }
1100 }
1101#endif /* IEEE80211_AMPDU_AGE */
1102}
1103
1104static struct ieee80211_channel *
1105findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags)
1106{
1107 return ieee80211_find_channel(ic, c->ic_freq,
1108 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags);
1109}
1110
1111/*
1112 * Adjust a channel to be HT/non-HT according to the vap's configuration.
1113 */
1114struct ieee80211_channel *
1115ieee80211_ht_adjust_channel(struct ieee80211com *ic,
1116 struct ieee80211_channel *chan, int flags)
1117{
1118 struct ieee80211_channel *c;
1119
1120 if (flags & IEEE80211_FHT_HT) {
1121 /* promote to HT if possible */
1122 if (flags & IEEE80211_FHT_USEHT40) {
1123 if (!IEEE80211_IS_CHAN_HT40(chan)) {
1124 /* NB: arbitrarily pick ht40+ over ht40- */
1125 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U);
1126 if (c == NULL)
1127 c = findhtchan(ic, chan,
1128 IEEE80211_CHAN_HT40D);
1129 if (c == NULL)
1130 c = findhtchan(ic, chan,
1131 IEEE80211_CHAN_HT20);
1132 if (c != NULL)
1133 chan = c;
1134 }
1135 } else if (!IEEE80211_IS_CHAN_HT20(chan)) {
1136 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20);
1137 if (c != NULL)
1138 chan = c;
1139 }
1140 } else if (IEEE80211_IS_CHAN_HT(chan)) {
1141 /* demote to legacy, HT use is disabled */
1142 c = ieee80211_find_channel(ic, chan->ic_freq,
1143 chan->ic_flags &~ IEEE80211_CHAN_HT);
1144 if (c != NULL)
1145 chan = c;
1146 }
1147 return chan;
1148}
1149
1150/*
1151 * Setup HT-specific state for a legacy WDS peer.
1152 */
1153void
1154ieee80211_ht_wds_init(struct ieee80211_node *ni)
1155{
1156 struct ieee80211vap *vap = ni->ni_vap;
1157 struct ieee80211_tx_ampdu *tap;
1158 int ac;
1159
1160 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested"));
1161
1162 /* XXX check scan cache in case peer has an ap and we have info */
1163 /*
1164 * If setup with a legacy channel; locate an HT channel.
1165 * Otherwise if the inherited channel (from a companion
1166 * AP) is suitable use it so we use the same location
1167 * for the extension channel).
1168 */
1169 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic,
1170 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan));
1171
1172 ni->ni_htcap = 0;
1173 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)
1174 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20;
1175 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) {
1176 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40;
1177 ni->ni_chw = 40;
1178 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
1179 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE;
1180 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
1181 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW;
1182 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)
1183 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40;
1184 } else {
1185 ni->ni_chw = 20;
1186 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE;
1187 }
1188 ni->ni_htctlchan = ni->ni_chan->ic_ieee;
1189 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
1190 ni->ni_flags |= IEEE80211_NODE_RIFS;
1191 /* XXX does it make sense to enable SMPS? */
1192
1193 ni->ni_htopmode = 0; /* XXX need protection state */
1194 ni->ni_htstbc = 0; /* XXX need info */
1195
1196 for (ac = 0; ac < WME_NUM_AC; ac++) {
1197 tap = &ni->ni_tx_ampdu[ac];
1198 tap->txa_ac = ac;
1199 }
1200 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */
1201 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1202}
1203
1204/*
1205 * Notify hostap vaps of a change in the HTINFO ie.
1206 */
1207static void
1208htinfo_notify(struct ieee80211com *ic)
1209{
1210 struct ieee80211vap *vap;
1211 int first = 1;
1212
1213 IEEE80211_LOCK_ASSERT(ic);
1214
1215 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1216 if (vap->iv_opmode != IEEE80211_M_HOSTAP)
1217 continue;
1218 if (vap->iv_state != IEEE80211_S_RUN ||
1219 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan))
1220 continue;
1221 if (first) {
1222 IEEE80211_NOTE(vap,
1223 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1224 vap->iv_bss,
1225 "HT bss occupancy change: %d sta, %d ht, "
1226 "%d ht40%s, HT protmode now 0x%x"
1227 , ic->ic_sta_assoc
1228 , ic->ic_ht_sta_assoc
1229 , ic->ic_ht40_sta_assoc
1230 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ?
1231 ", non-HT sta present" : ""
1232 , ic->ic_curhtprotmode);
1233 first = 0;
1234 }
1235 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO);
1236 }
1237}
1238
1239/*
1240 * Calculate HT protection mode from current
1241 * state and handle updates.
1242 */
1243static void
1244htinfo_update(struct ieee80211com *ic)
1245{
1246 uint8_t protmode;
1247
1248 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) {
1249 protmode = IEEE80211_HTINFO_OPMODE_MIXED
1250 | IEEE80211_HTINFO_NONHT_PRESENT;
1251 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) {
1252 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT
1253 | IEEE80211_HTINFO_NONHT_PRESENT;
1254 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
1255 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) &&
1256 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) {
1257 protmode = IEEE80211_HTINFO_OPMODE_HT20PR;
1258 } else {
1259 protmode = IEEE80211_HTINFO_OPMODE_PURE;
1260 }
1261 if (protmode != ic->ic_curhtprotmode) {
1262 ic->ic_curhtprotmode = protmode;
1263 htinfo_notify(ic);
1264 }
1265}
1266
1267/*
1268 * Handle an HT station joining a BSS.
1269 */
1270void
1271ieee80211_ht_node_join(struct ieee80211_node *ni)
1272{
1273 struct ieee80211com *ic = ni->ni_ic;
1274
1275 IEEE80211_LOCK_ASSERT(ic);
1276
1277 if (ni->ni_flags & IEEE80211_NODE_HT) {
1278 ic->ic_ht_sta_assoc++;
1279 if (ni->ni_chw == 40)
1280 ic->ic_ht40_sta_assoc++;
1281 }
1282 htinfo_update(ic);
1283}
1284
1285/*
1286 * Handle an HT station leaving a BSS.
1287 */
1288void
1289ieee80211_ht_node_leave(struct ieee80211_node *ni)
1290{
1291 struct ieee80211com *ic = ni->ni_ic;
1292
1293 IEEE80211_LOCK_ASSERT(ic);
1294
1295 if (ni->ni_flags & IEEE80211_NODE_HT) {
1296 ic->ic_ht_sta_assoc--;
1297 if (ni->ni_chw == 40)
1298 ic->ic_ht40_sta_assoc--;
1299 }
1300 htinfo_update(ic);
1301}
1302
1303/*
1304 * Public version of htinfo_update; used for processing
1305 * beacon frames from overlapping bss.
1306 *
1307 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED
1308 * (on receipt of a beacon that advertises MIXED) or
1309 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon
1310 * from an overlapping legacy bss). We treat MIXED with
1311 * a higher precedence than PROTOPT (i.e. we will not change
1312 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This
1313 * corresponds to how we handle things in htinfo_update.
1314 */
1315void
1316ieee80211_htprot_update(struct ieee80211com *ic, int protmode)
1317{
1318#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE)
1319 IEEE80211_LOCK(ic);
1320
1321 /* track non-HT station presence */
1322 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT,
1323 ("protmode 0x%x", protmode));
1324 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR;
1325 ic->ic_lastnonht = ticks;
1326
1327 if (protmode != ic->ic_curhtprotmode &&
1328 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED ||
1329 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) {
1330 /* push beacon update */
1331 ic->ic_curhtprotmode = protmode;
1332 htinfo_notify(ic);
1333 }
1334 IEEE80211_UNLOCK(ic);
1335#undef OPMODE
1336}
1337
1338/*
1339 * Time out presence of an overlapping bss with non-HT
1340 * stations. When operating in hostap mode we listen for
1341 * beacons from other stations and if we identify a non-HT
1342 * station is present we update the opmode field of the
1343 * HTINFO ie. To identify when all non-HT stations are
1344 * gone we time out this condition.
1345 */
1346void
1347ieee80211_ht_timeout(struct ieee80211com *ic)
1348{
1349 IEEE80211_LOCK_ASSERT(ic);
1350
1351 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) &&
1352 time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) {
1353#if 0
1354 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1355 "%s", "time out non-HT STA present on channel");
1356#endif
1357 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
1358 htinfo_update(ic);
1359 }
1360}
1361
1362/* unalligned little endian access */
1363#define LE_READ_2(p) \
1364 ((uint16_t) \
1365 ((((const uint8_t *)(p))[0] ) | \
1366 (((const uint8_t *)(p))[1] << 8)))
1367
1368/*
1369 * Process an 802.11n HT capabilities ie.
1370 */
1371void
1372ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie)
1373{
1374 if (ie[0] == IEEE80211_ELEMID_VENDOR) {
1375 /*
1376 * Station used Vendor OUI ie to associate;
1377 * mark the node so when we respond we'll use
1378 * the Vendor OUI's and not the standard ie's.
1379 */
1380 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT;
1381 ie += 4;
1382 } else
1383 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT;
1384
1385 ni->ni_htcap = LE_READ_2(ie +
1386 __offsetof(struct ieee80211_ie_htcap, hc_cap));
1387 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)];
1388}
1389
1390static void
1391htinfo_parse(struct ieee80211_node *ni,
1392 const struct ieee80211_ie_htinfo *htinfo)
1393{
1394 uint16_t w;
1395
1396 ni->ni_htctlchan = htinfo->hi_ctrlchannel;
1397 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN);
1398 w = LE_READ_2(&htinfo->hi_byte2);
1399 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE);
1400 w = LE_READ_2(&htinfo->hi_byte45);
1401 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS);
1402}
1403
1404/*
1405 * Parse an 802.11n HT info ie and save useful information
1406 * to the node state. Note this does not effect any state
1407 * changes such as for channel width change.
1408 */
1409void
1410ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie)
1411{
1412 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1413 ie += 4;
1414 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie);
1415}
1416
1417/*
1418 * Handle 11n channel switch. Use the received HT ie's to
1419 * identify the right channel to use. If we cannot locate it
1420 * in the channel table then fallback to legacy operation.
1421 * Note that we use this information to identify the node's
1422 * channel only; the caller is responsible for insuring any
1423 * required channel change is done (e.g. in sta mode when
1424 * parsing the contents of a beacon frame).
1425 */
1426static void
1427htinfo_update_chw(struct ieee80211_node *ni, int htflags)
1428{
1429 struct ieee80211com *ic = ni->ni_ic;
1430 struct ieee80211_channel *c;
1431 int chanflags;
1432
1433 chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags;
1434 if (chanflags != ni->ni_chan->ic_flags) {
1435 /* XXX not right for ht40- */
1436 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags);
1437 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) {
1438 /*
1439 * No HT40 channel entry in our table; fall back
1440 * to HT20 operation. This should not happen.
1441 */
1442 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20);
1443#if 0
1444 IEEE80211_NOTE(ni->ni_vap,
1445 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1446 "no HT40 channel (freq %u), falling back to HT20",
1447 ni->ni_chan->ic_freq);
1448#endif
1449 /* XXX stat */
1450 }
1451 if (c != NULL && c != ni->ni_chan) {
1452 IEEE80211_NOTE(ni->ni_vap,
1453 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1454 "switch station to HT%d channel %u/0x%x",
1455 IEEE80211_IS_CHAN_HT40(c) ? 40 : 20,
1456 c->ic_freq, c->ic_flags);
1457 ni->ni_chan = c;
1458 }
1459 /* NB: caller responsible for forcing any channel change */
1460 }
1461 /* update node's tx channel width */
1462 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20;
1463}
1464
1465/*
1466 * Update 11n MIMO PS state according to received htcap.
1467 */
1468static __inline int
1469htcap_update_mimo_ps(struct ieee80211_node *ni)
1470{
1471 uint16_t oflags = ni->ni_flags;
1472
1473 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) {
1474 case IEEE80211_HTCAP_SMPS_DYNAMIC:
1475 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1476 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
1477 break;
1478 case IEEE80211_HTCAP_SMPS_ENA:
1479 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1480 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1481 break;
1482 case IEEE80211_HTCAP_SMPS_OFF:
1483 default: /* disable on rx of reserved value */
1484 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
1485 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1486 break;
1487 }
1488 return (oflags ^ ni->ni_flags);
1489}
1490
1491/*
1492 * Update short GI state according to received htcap
1493 * and local settings.
1494 */
1495static __inline void
1496htcap_update_shortgi(struct ieee80211_node *ni)
1497{
1498 struct ieee80211vap *vap = ni->ni_vap;
1499
1500 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40);
1501 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) &&
1502 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20))
1503 ni->ni_flags |= IEEE80211_NODE_SGI20;
1504 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) &&
1505 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40))
1506 ni->ni_flags |= IEEE80211_NODE_SGI40;
1507}
1508
1509/*
1510 * Parse and update HT-related state extracted from
1511 * the HT cap and info ie's.
1512 */
1513void
1514ieee80211_ht_updateparams(struct ieee80211_node *ni,
1515 const uint8_t *htcapie, const uint8_t *htinfoie)
1516{
1517 struct ieee80211vap *vap = ni->ni_vap;
1518 const struct ieee80211_ie_htinfo *htinfo;
1519 int htflags;
1520
1521 ieee80211_parse_htcap(ni, htcapie);
1522 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1523 htcap_update_mimo_ps(ni);
1524 htcap_update_shortgi(ni);
1525
1526 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR)
1527 htinfoie += 4;
1528 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
1529 htinfo_parse(ni, htinfo);
1530
1531 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1532 IEEE80211_CHAN_HT20 : 0;
1533 /* NB: honor operating mode constraint */
1534 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) &&
1535 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1536 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE)
1537 htflags = IEEE80211_CHAN_HT40U;
1538 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW)
1539 htflags = IEEE80211_CHAN_HT40D;
1540 }
1541 htinfo_update_chw(ni, htflags);
1542
1543 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) &&
1544 (vap->iv_flags_ht & IEEE80211_FHT_RIFS))
1545 ni->ni_flags |= IEEE80211_NODE_RIFS;
1546 else
1547 ni->ni_flags &= ~IEEE80211_NODE_RIFS;
1548}
1549
1550/*
1551 * Parse and update HT-related state extracted from the HT cap ie
1552 * for a station joining an HT BSS.
1553 */
1554void
1555ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie)
1556{
1557 struct ieee80211vap *vap = ni->ni_vap;
1558 int htflags;
1559
1560 ieee80211_parse_htcap(ni, htcapie);
1561 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1562 htcap_update_mimo_ps(ni);
1563 htcap_update_shortgi(ni);
1564
1565 /* NB: honor operating mode constraint */
1566 /* XXX 40 MHz intolerant */
1567 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1568 IEEE80211_CHAN_HT20 : 0;
1569 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) &&
1570 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1571 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan))
1572 htflags = IEEE80211_CHAN_HT40U;
1573 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan))
1574 htflags = IEEE80211_CHAN_HT40D;
1575 }
1576 htinfo_update_chw(ni, htflags);
1577}
1578
1579/*
1580 * Install received HT rate set by parsing the HT cap ie.
1581 */
1582int
1583ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags)
1584{
1585 struct ieee80211com *ic = ni->ni_ic;
1586 struct ieee80211vap *vap = ni->ni_vap;
1587 const struct ieee80211_ie_htcap *htcap;
1588 struct ieee80211_htrateset *rs;
1589 int i, maxequalmcs, maxunequalmcs;
1590
1591 maxequalmcs = ic->ic_txstream * 8 - 1;
1592 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
1593 if (ic->ic_txstream >= 2)
1594 maxunequalmcs = 38;
1595 if (ic->ic_txstream >= 3)
1596 maxunequalmcs = 52;
1597 if (ic->ic_txstream >= 4)
1598 maxunequalmcs = 76;
1599 } else
1600 maxunequalmcs = 0;
1601
1602 rs = &ni->ni_htrates;
1603 memset(rs, 0, sizeof(*rs));
1604 if (ie != NULL) {
1605 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1606 ie += 4;
1607 htcap = (const struct ieee80211_ie_htcap *) ie;
1608 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1609 if (isclr(htcap->hc_mcsset, i))
1610 continue;
1611 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) {
1612 IEEE80211_NOTE(vap,
1613 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1614 "WARNING, HT rate set too large; only "
1615 "using %u rates", IEEE80211_HTRATE_MAXSIZE);
1616 vap->iv_stats.is_rx_rstoobig++;
1617 break;
1618 }
1619 if (i <= 31 && i > maxequalmcs)
1620 continue;
1621 if (i == 32 &&
1622 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
1623 continue;
1624 if (i > 32 && i > maxunequalmcs)
1625 continue;
1626 rs->rs_rates[rs->rs_nrates++] = i;
1627 }
1628 }
1629 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags);
1630}
1631
1632/*
1633 * Mark rates in a node's HT rate set as basic according
1634 * to the information in the supplied HT info ie.
1635 */
1636void
1637ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie)
1638{
1639 const struct ieee80211_ie_htinfo *htinfo;
1640 struct ieee80211_htrateset *rs;
1641 int i, j;
1642
1643 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1644 ie += 4;
1645 htinfo = (const struct ieee80211_ie_htinfo *) ie;
1646 rs = &ni->ni_htrates;
1647 if (rs->rs_nrates == 0) {
1648 IEEE80211_NOTE(ni->ni_vap,
1649 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1650 "%s", "WARNING, empty HT rate set");
1651 return;
1652 }
1653 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1654 if (isclr(htinfo->hi_basicmcsset, i))
1655 continue;
1656 for (j = 0; j < rs->rs_nrates; j++)
1657 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i)
1658 rs->rs_rates[j] |= IEEE80211_RATE_BASIC;
1659 }
1660}
1661
1662static void
1663ampdu_tx_setup(struct ieee80211_tx_ampdu *tap)
1664{
1665 callout_init(&tap->txa_timer, CALLOUT_MPSAFE);
1666 tap->txa_flags |= IEEE80211_AGGR_SETUP;
1667}
1668
1669static void
1670ampdu_tx_stop(struct ieee80211_tx_ampdu *tap)
1671{
1672 struct ieee80211_node *ni = tap->txa_ni;
1673 struct ieee80211com *ic = ni->ni_ic;
1674
1675 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP,
1676 ("txa_flags 0x%x ac %d", tap->txa_flags, tap->txa_ac));
1677
1678 /*
1679 * Stop BA stream if setup so driver has a chance
1680 * to reclaim any resources it might have allocated.
1681 */
1682 ic->ic_addba_stop(ni, tap);
1683 /*
1684 * Stop any pending BAR transmit.
1685 */
1686 bar_stop_timer(tap);
1687
1688 tap->txa_lastsample = 0;
1689 tap->txa_avgpps = 0;
1690 /* NB: clearing NAK means we may re-send ADDBA */
1691 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK);
1692}
1693
| 241 ic->ic_addba_stop = ieee80211_addba_stop;
242 ic->ic_bar_response = ieee80211_bar_response;
243 ic->ic_ampdu_rx_start = ampdu_rx_start;
244 ic->ic_ampdu_rx_stop = ampdu_rx_stop;
245
246 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS;
247 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
248}
249
250void
251ieee80211_ht_detach(struct ieee80211com *ic)
252{
253}
254
255void
256ieee80211_ht_vattach(struct ieee80211vap *vap)
257{
258
259 /* driver can override defaults */
260 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K;
261 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA;
262 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax;
263 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU;
264 /* tx aggregation traffic thresholds */
265 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128;
266 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64;
267 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32;
268 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32;
269
270 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
271 /*
272 * Device is HT capable; enable all HT-related
273 * facilities by default.
274 * XXX these choices may be too aggressive.
275 */
276 vap->iv_flags_ht |= IEEE80211_FHT_HT
277 | IEEE80211_FHT_HTCOMPAT
278 ;
279 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20)
280 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20;
281 /* XXX infer from channel list? */
282 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
283 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40;
284 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40)
285 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40;
286 }
287 /* enable RIFS if capable */
288 if (vap->iv_htcaps & IEEE80211_HTC_RIFS)
289 vap->iv_flags_ht |= IEEE80211_FHT_RIFS;
290
291 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */
292 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX;
293 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU)
294 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX;
295 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX;
296 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU)
297 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX;
298 }
299 /* NB: disable default legacy WDS, too many issues right now */
300 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)
301 vap->iv_flags_ht &= ~IEEE80211_FHT_HT;
302}
303
304void
305ieee80211_ht_vdetach(struct ieee80211vap *vap)
306{
307}
308
309static int
310ht_getrate(struct ieee80211com *ic, int index, int mode, int ratetype)
311{
312 int mword, rate;
313
314 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode);
315 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS)
316 return (0);
317 switch (ratetype) {
318 case 0:
319 rate = ieee80211_htrates[index].ht20_rate_800ns;
320 break;
321 case 1:
322 rate = ieee80211_htrates[index].ht20_rate_400ns;
323 break;
324 case 2:
325 rate = ieee80211_htrates[index].ht40_rate_800ns;
326 break;
327 default:
328 rate = ieee80211_htrates[index].ht40_rate_400ns;
329 break;
330 }
331 return (rate);
332}
333
334static struct printranges {
335 int minmcs;
336 int maxmcs;
337 int txstream;
338 int ratetype;
339 int htcapflags;
340} ranges[] = {
341 { 0, 7, 1, 0, 0 },
342 { 8, 15, 2, 0, 0 },
343 { 16, 23, 3, 0, 0 },
344 { 24, 31, 4, 0, 0 },
345 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 },
346 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL },
347 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL },
348 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL },
349 { 0, 0, 0, 0, 0 },
350};
351
352static void
353ht_rateprint(struct ieee80211com *ic, int mode, int ratetype)
354{
355 struct ifnet *ifp = ic->ic_ifp;
356 int minrate, maxrate;
357 struct printranges *range;
358
359 for (range = ranges; range->txstream != 0; range++) {
360 if (ic->ic_txstream < range->txstream)
361 continue;
362 if (range->htcapflags &&
363 (ic->ic_htcaps & range->htcapflags) == 0)
364 continue;
365 if (ratetype < range->ratetype)
366 continue;
367 minrate = ht_getrate(ic, range->minmcs, mode, ratetype);
368 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype);
369 if (range->maxmcs) {
370 if_printf(ifp, "MCS %d-%d: %d%sMbps - %d%sMbps\n",
371 range->minmcs, range->maxmcs,
372 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""),
373 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : ""));
374 } else {
375 if_printf(ifp, "MCS %d: %d%sMbps\n", range->minmcs,
376 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""));
377 }
378 }
379}
380
381static void
382ht_announce(struct ieee80211com *ic, int mode)
383{
384 struct ifnet *ifp = ic->ic_ifp;
385 const char *modestr = ieee80211_phymode_name[mode];
386
387 if_printf(ifp, "%s MCS 20MHz\n", modestr);
388 ht_rateprint(ic, mode, 0);
389 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) {
390 if_printf(ifp, "%s MCS 20MHz SGI\n", modestr);
391 ht_rateprint(ic, mode, 1);
392 }
393 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
394 if_printf(ifp, "%s MCS 40MHz:\n", modestr);
395 ht_rateprint(ic, mode, 2);
396 }
397 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
398 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) {
399 if_printf(ifp, "%s MCS 40MHz SGI:\n", modestr);
400 ht_rateprint(ic, mode, 3);
401 }
402}
403
404void
405ieee80211_ht_announce(struct ieee80211com *ic)
406{
407 struct ifnet *ifp = ic->ic_ifp;
408
409 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
410 isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
411 if_printf(ifp, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream);
412 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA))
413 ht_announce(ic, IEEE80211_MODE_11NA);
414 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
415 ht_announce(ic, IEEE80211_MODE_11NG);
416}
417
418static struct ieee80211_htrateset htrateset;
419
420const struct ieee80211_htrateset *
421ieee80211_get_suphtrates(struct ieee80211com *ic,
422 const struct ieee80211_channel *c)
423{
424#define ADDRATE(x) do { \
425 htrateset.rs_rates[htrateset.rs_nrates] = x; \
426 htrateset.rs_nrates++; \
427} while (0)
428 int i;
429
430 memset(&htrateset, 0, sizeof(struct ieee80211_htrateset));
431 for (i = 0; i < ic->ic_txstream * 8; i++)
432 ADDRATE(i);
433 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
434 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32))
435 ADDRATE(i);
436 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
437 if (ic->ic_txstream >= 2) {
438 for (i = 33; i <= 38; i++)
439 ADDRATE(i);
440 }
441 if (ic->ic_txstream >= 3) {
442 for (i = 39; i <= 52; i++)
443 ADDRATE(i);
444 }
445 if (ic->ic_txstream == 4) {
446 for (i = 53; i <= 76; i++)
447 ADDRATE(i);
448 }
449 }
450 return &htrateset;
451#undef ADDRATE
452}
453
454/*
455 * Receive processing.
456 */
457
458/*
459 * Decap the encapsulated A-MSDU frames and dispatch all but
460 * the last for delivery. The last frame is returned for
461 * delivery via the normal path.
462 */
463struct mbuf *
464ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m)
465{
466 struct ieee80211vap *vap = ni->ni_vap;
467 int framelen;
468 struct mbuf *n;
469
470 /* discard 802.3 header inserted by ieee80211_decap */
471 m_adj(m, sizeof(struct ether_header));
472
473 vap->iv_stats.is_amsdu_decap++;
474
475 for (;;) {
476 /*
477 * Decap the first frame, bust it apart from the
478 * remainder and deliver. We leave the last frame
479 * delivery to the caller (for consistency with other
480 * code paths, could also do it here).
481 */
482 m = ieee80211_decap1(m, &framelen);
483 if (m == NULL) {
484 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
485 ni->ni_macaddr, "a-msdu", "%s", "decap failed");
486 vap->iv_stats.is_amsdu_tooshort++;
487 return NULL;
488 }
489 if (m->m_pkthdr.len == framelen)
490 break;
491 n = m_split(m, framelen, M_NOWAIT);
492 if (n == NULL) {
493 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
494 ni->ni_macaddr, "a-msdu",
495 "%s", "unable to split encapsulated frames");
496 vap->iv_stats.is_amsdu_split++;
497 m_freem(m); /* NB: must reclaim */
498 return NULL;
499 }
500 vap->iv_deliver_data(vap, ni, m);
501
502 /*
503 * Remove frame contents; each intermediate frame
504 * is required to be aligned to a 4-byte boundary.
505 */
506 m = n;
507 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */
508 }
509 return m; /* last delivered by caller */
510}
511
512/*
513 * Purge all frames in the A-MPDU re-order queue.
514 */
515static void
516ampdu_rx_purge(struct ieee80211_rx_ampdu *rap)
517{
518 struct mbuf *m;
519 int i;
520
521 for (i = 0; i < rap->rxa_wnd; i++) {
522 m = rap->rxa_m[i];
523 if (m != NULL) {
524 rap->rxa_m[i] = NULL;
525 rap->rxa_qbytes -= m->m_pkthdr.len;
526 m_freem(m);
527 if (--rap->rxa_qframes == 0)
528 break;
529 }
530 }
531 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0,
532 ("lost %u data, %u frames on ampdu rx q",
533 rap->rxa_qbytes, rap->rxa_qframes));
534}
535
536/*
537 * Start A-MPDU rx/re-order processing for the specified TID.
538 */
539static int
540ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap,
541 int baparamset, int batimeout, int baseqctl)
542{
543 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
544
545 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
546 /*
547 * AMPDU previously setup and not terminated with a DELBA,
548 * flush the reorder q's in case anything remains.
549 */
550 ampdu_rx_purge(rap);
551 }
552 memset(rap, 0, sizeof(*rap));
553 rap->rxa_wnd = (bufsiz == 0) ?
554 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
555 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START);
556 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
557
558 return 0;
559}
560
561/*
562 * Stop A-MPDU rx processing for the specified TID.
563 */
564static void
565ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
566{
567
568 ampdu_rx_purge(rap);
569 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND);
570}
571
572/*
573 * Dispatch a frame from the A-MPDU reorder queue. The
574 * frame is fed back into ieee80211_input marked with an
575 * M_AMPDU_MPDU flag so it doesn't come back to us (it also
576 * permits ieee80211_input to optimize re-processing).
577 */
578static __inline void
579ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m)
580{
581 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */
582 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */
583 (void) ieee80211_input(ni, m, 0, 0);
584}
585
586/*
587 * Dispatch as many frames as possible from the re-order queue.
588 * Frames will always be "at the front"; we process all frames
589 * up to the first empty slot in the window. On completion we
590 * cleanup state if there are still pending frames in the current
591 * BA window. We assume the frame at slot 0 is already handled
592 * by the caller; we always start at slot 1.
593 */
594static void
595ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni)
596{
597 struct ieee80211vap *vap = ni->ni_vap;
598 struct mbuf *m;
599 int i;
600
601 /* flush run of frames */
602 for (i = 1; i < rap->rxa_wnd; i++) {
603 m = rap->rxa_m[i];
604 if (m == NULL)
605 break;
606 rap->rxa_m[i] = NULL;
607 rap->rxa_qbytes -= m->m_pkthdr.len;
608 rap->rxa_qframes--;
609
610 ampdu_dispatch(ni, m);
611 }
612 /*
613 * If frames remain, copy the mbuf pointers down so
614 * they correspond to the offsets in the new window.
615 */
616 if (rap->rxa_qframes != 0) {
617 int n = rap->rxa_qframes, j;
618 for (j = i+1; j < rap->rxa_wnd; j++) {
619 if (rap->rxa_m[j] != NULL) {
620 rap->rxa_m[j-i] = rap->rxa_m[j];
621 rap->rxa_m[j] = NULL;
622 if (--n == 0)
623 break;
624 }
625 }
626 KASSERT(n == 0, ("lost %d frames", n));
627 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
628 }
629 /*
630 * Adjust the start of the BA window to
631 * reflect the frames just dispatched.
632 */
633 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i);
634 vap->iv_stats.is_ampdu_rx_oor += i;
635}
636
637#ifdef IEEE80211_AMPDU_AGE
638/*
639 * Dispatch all frames in the A-MPDU re-order queue.
640 */
641static void
642ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
643{
644 struct ieee80211vap *vap = ni->ni_vap;
645 struct mbuf *m;
646 int i;
647
648 for (i = 0; i < rap->rxa_wnd; i++) {
649 m = rap->rxa_m[i];
650 if (m == NULL)
651 continue;
652 rap->rxa_m[i] = NULL;
653 rap->rxa_qbytes -= m->m_pkthdr.len;
654 rap->rxa_qframes--;
655 vap->iv_stats.is_ampdu_rx_oor++;
656
657 ampdu_dispatch(ni, m);
658 if (rap->rxa_qframes == 0)
659 break;
660 }
661}
662#endif /* IEEE80211_AMPDU_AGE */
663
664/*
665 * Dispatch all frames in the A-MPDU re-order queue
666 * preceding the specified sequence number. This logic
667 * handles window moves due to a received MSDU or BAR.
668 */
669static void
670ampdu_rx_flush_upto(struct ieee80211_node *ni,
671 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart)
672{
673 struct ieee80211vap *vap = ni->ni_vap;
674 struct mbuf *m;
675 ieee80211_seq seqno;
676 int i;
677
678 /*
679 * Flush any complete MSDU's with a sequence number lower
680 * than winstart. Gaps may exist. Note that we may actually
681 * dispatch frames past winstart if a run continues; this is
682 * an optimization that avoids having to do a separate pass
683 * to dispatch frames after moving the BA window start.
684 */
685 seqno = rap->rxa_start;
686 for (i = 0; i < rap->rxa_wnd; i++) {
687 m = rap->rxa_m[i];
688 if (m != NULL) {
689 rap->rxa_m[i] = NULL;
690 rap->rxa_qbytes -= m->m_pkthdr.len;
691 rap->rxa_qframes--;
692 vap->iv_stats.is_ampdu_rx_oor++;
693
694 ampdu_dispatch(ni, m);
695 } else {
696 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart))
697 break;
698 }
699 seqno = IEEE80211_SEQ_INC(seqno);
700 }
701 /*
702 * If frames remain, copy the mbuf pointers down so
703 * they correspond to the offsets in the new window.
704 */
705 if (rap->rxa_qframes != 0) {
706 int n = rap->rxa_qframes, j;
707
708 /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */
709 KASSERT(rap->rxa_m[0] == NULL,
710 ("%s: BA window slot 0 occupied", __func__));
711 for (j = i+1; j < rap->rxa_wnd; j++) {
712 if (rap->rxa_m[j] != NULL) {
713 rap->rxa_m[j-i] = rap->rxa_m[j];
714 rap->rxa_m[j] = NULL;
715 if (--n == 0)
716 break;
717 }
718 }
719 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d "
720 "BA win <%d:%d> winstart %d",
721 __func__, n, rap->rxa_qframes, i, rap->rxa_start,
722 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
723 winstart));
724 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
725 }
726 /*
727 * Move the start of the BA window; we use the
728 * sequence number of the last MSDU that was
729 * passed up the stack+1 or winstart if stopped on
730 * a gap in the reorder buffer.
731 */
732 rap->rxa_start = seqno;
733}
734
735/*
736 * Process a received QoS data frame for an HT station. Handle
737 * A-MPDU reordering: if this frame is received out of order
738 * and falls within the BA window hold onto it. Otherwise if
739 * this frame completes a run, flush any pending frames. We
740 * return 1 if the frame is consumed. A 0 is returned if
741 * the frame should be processed normally by the caller.
742 */
743int
744ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m)
745{
746#define IEEE80211_FC0_QOSDATA \
747 (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0)
748#define PROCESS 0 /* caller should process frame */
749#define CONSUMED 1 /* frame consumed, caller does nothing */
750 struct ieee80211vap *vap = ni->ni_vap;
751 struct ieee80211_qosframe *wh;
752 struct ieee80211_rx_ampdu *rap;
753 ieee80211_seq rxseq;
754 uint8_t tid;
755 int off;
756
757 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU,
758 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags));
759 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
760
761 /* NB: m_len known to be sufficient */
762 wh = mtod(m, struct ieee80211_qosframe *);
763 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) {
764 /*
765 * Not QoS data, shouldn't get here but just
766 * return it to the caller for processing.
767 */
768 return PROCESS;
769 }
770 if (IEEE80211_IS_DSTODS(wh))
771 tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0];
772 else
773 tid = wh->i_qos[0];
774 tid &= IEEE80211_QOS_TID;
775 rap = &ni->ni_rx_ampdu[tid];
776 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
777 /*
778 * No ADDBA request yet, don't touch.
779 */
780 return PROCESS;
781 }
782 rxseq = le16toh(*(uint16_t *)wh->i_seq);
783 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) {
784 /*
785 * Fragments are not allowed; toss.
786 */
787 IEEE80211_DISCARD_MAC(vap,
788 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
789 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid,
790 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
791 vap->iv_stats.is_ampdu_rx_drop++;
792 IEEE80211_NODE_STAT(ni, rx_drop);
793 m_freem(m);
794 return CONSUMED;
795 }
796 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT;
797 rap->rxa_nframes++;
798again:
799 if (rxseq == rap->rxa_start) {
800 /*
801 * First frame in window.
802 */
803 if (rap->rxa_qframes != 0) {
804 /*
805 * Dispatch as many packets as we can.
806 */
807 KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup"));
808 ampdu_dispatch(ni, m);
809 ampdu_rx_dispatch(rap, ni);
810 return CONSUMED;
811 } else {
812 /*
813 * In order; advance window and notify
814 * caller to dispatch directly.
815 */
816 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
817 return PROCESS;
818 }
819 }
820 /*
821 * Frame is out of order; store if in the BA window.
822 */
823 /* calculate offset in BA window */
824 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
825 if (off < rap->rxa_wnd) {
826 /*
827 * Common case (hopefully): in the BA window.
828 * Sec 9.10.7.6.2 a) (p.137)
829 */
830#ifdef IEEE80211_AMPDU_AGE
831 /*
832 * Check for frames sitting too long in the reorder queue.
833 * This should only ever happen if frames are not delivered
834 * without the sender otherwise notifying us (e.g. with a
835 * BAR to move the window). Typically this happens because
836 * of vendor bugs that cause the sequence number to jump.
837 * When this happens we get a gap in the reorder queue that
838 * leaves frame sitting on the queue until they get pushed
839 * out due to window moves. When the vendor does not send
840 * BAR this move only happens due to explicit packet sends
841 *
842 * NB: we only track the time of the oldest frame in the
843 * reorder q; this means that if we flush we might push
844 * frames that still "new"; if this happens then subsequent
845 * frames will result in BA window moves which cost something
846 * but is still better than a big throughput dip.
847 */
848 if (rap->rxa_qframes != 0) {
849 /* XXX honor batimeout? */
850 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
851 /*
852 * Too long since we received the first
853 * frame; flush the reorder buffer.
854 */
855 if (rap->rxa_qframes != 0) {
856 vap->iv_stats.is_ampdu_rx_age +=
857 rap->rxa_qframes;
858 ampdu_rx_flush(ni, rap);
859 }
860 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
861 return PROCESS;
862 }
863 } else {
864 /*
865 * First frame, start aging timer.
866 */
867 rap->rxa_age = ticks;
868 }
869#endif /* IEEE80211_AMPDU_AGE */
870 /* save packet */
871 if (rap->rxa_m[off] == NULL) {
872 rap->rxa_m[off] = m;
873 rap->rxa_qframes++;
874 rap->rxa_qbytes += m->m_pkthdr.len;
875 vap->iv_stats.is_ampdu_rx_reorder++;
876 } else {
877 IEEE80211_DISCARD_MAC(vap,
878 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
879 ni->ni_macaddr, "a-mpdu duplicate",
880 "seqno %u tid %u BA win <%u:%u>",
881 rxseq, tid, rap->rxa_start,
882 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1));
883 vap->iv_stats.is_rx_dup++;
884 IEEE80211_NODE_STAT(ni, rx_dup);
885 m_freem(m);
886 }
887 return CONSUMED;
888 }
889 if (off < IEEE80211_SEQ_BA_RANGE) {
890 /*
891 * Outside the BA window, but within range;
892 * flush the reorder q and move the window.
893 * Sec 9.10.7.6.2 b) (p.138)
894 */
895 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
896 "move BA win <%u:%u> (%u frames) rxseq %u tid %u",
897 rap->rxa_start,
898 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
899 rap->rxa_qframes, rxseq, tid);
900 vap->iv_stats.is_ampdu_rx_move++;
901
902 /*
903 * The spec says to flush frames up to but not including:
904 * WinStart_B = rxseq - rap->rxa_wnd + 1
905 * Then insert the frame or notify the caller to process
906 * it immediately. We can safely do this by just starting
907 * over again because we know the frame will now be within
908 * the BA window.
909 */
910 /* NB: rxa_wnd known to be >0 */
911 ampdu_rx_flush_upto(ni, rap,
912 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1));
913 goto again;
914 } else {
915 /*
916 * Outside the BA window and out of range; toss.
917 * Sec 9.10.7.6.2 c) (p.138)
918 */
919 IEEE80211_DISCARD_MAC(vap,
920 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
921 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
922 rap->rxa_start,
923 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
924 rap->rxa_qframes, rxseq, tid,
925 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
926 vap->iv_stats.is_ampdu_rx_drop++;
927 IEEE80211_NODE_STAT(ni, rx_drop);
928 m_freem(m);
929 return CONSUMED;
930 }
931#undef CONSUMED
932#undef PROCESS
933#undef IEEE80211_FC0_QOSDATA
934}
935
936/*
937 * Process a BAR ctl frame. Dispatch all frames up to
938 * the sequence number of the frame. If this frame is
939 * out of range it's discarded.
940 */
941void
942ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0)
943{
944 struct ieee80211vap *vap = ni->ni_vap;
945 struct ieee80211_frame_bar *wh;
946 struct ieee80211_rx_ampdu *rap;
947 ieee80211_seq rxseq;
948 int tid, off;
949
950 if (!ieee80211_recv_bar_ena) {
951#if 0
952 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N,
953 ni->ni_macaddr, "BAR", "%s", "processing disabled");
954#endif
955 vap->iv_stats.is_ampdu_bar_bad++;
956 return;
957 }
958 wh = mtod(m0, struct ieee80211_frame_bar *);
959 /* XXX check basic BAR */
960 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID);
961 rap = &ni->ni_rx_ampdu[tid];
962 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
963 /*
964 * No ADDBA request yet, don't touch.
965 */
966 IEEE80211_DISCARD_MAC(vap,
967 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
968 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid);
969 vap->iv_stats.is_ampdu_bar_bad++;
970 return;
971 }
972 vap->iv_stats.is_ampdu_bar_rx++;
973 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
974 if (rxseq == rap->rxa_start)
975 return;
976 /* calculate offset in BA window */
977 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
978 if (off < IEEE80211_SEQ_BA_RANGE) {
979 /*
980 * Flush the reorder q up to rxseq and move the window.
981 * Sec 9.10.7.6.3 a) (p.138)
982 */
983 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
984 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u",
985 rap->rxa_start,
986 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
987 rap->rxa_qframes, rxseq, tid);
988 vap->iv_stats.is_ampdu_bar_move++;
989
990 ampdu_rx_flush_upto(ni, rap, rxseq);
991 if (off >= rap->rxa_wnd) {
992 /*
993 * BAR specifies a window start to the right of BA
994 * window; we must move it explicitly since
995 * ampdu_rx_flush_upto will not.
996 */
997 rap->rxa_start = rxseq;
998 }
999 } else {
1000 /*
1001 * Out of range; toss.
1002 * Sec 9.10.7.6.3 b) (p.138)
1003 */
1004 IEEE80211_DISCARD_MAC(vap,
1005 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1006 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1007 rap->rxa_start,
1008 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1009 rap->rxa_qframes, rxseq, tid,
1010 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1011 vap->iv_stats.is_ampdu_bar_oow++;
1012 IEEE80211_NODE_STAT(ni, rx_drop);
1013 }
1014}
1015
1016/*
1017 * Setup HT-specific state in a node. Called only
1018 * when HT use is negotiated so we don't do extra
1019 * work for temporary and/or legacy sta's.
1020 */
1021void
1022ieee80211_ht_node_init(struct ieee80211_node *ni)
1023{
1024 struct ieee80211_tx_ampdu *tap;
1025 int ac;
1026
1027 if (ni->ni_flags & IEEE80211_NODE_HT) {
1028 /*
1029 * Clean AMPDU state on re-associate. This handles the case
1030 * where a station leaves w/o notifying us and then returns
1031 * before node is reaped for inactivity.
1032 */
1033 ieee80211_ht_node_cleanup(ni);
1034 }
1035 for (ac = 0; ac < WME_NUM_AC; ac++) {
1036 tap = &ni->ni_tx_ampdu[ac];
1037 tap->txa_ac = ac;
1038 tap->txa_ni = ni;
1039 /* NB: further initialization deferred */
1040 }
1041 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1042}
1043
1044/*
1045 * Cleanup HT-specific state in a node. Called only
1046 * when HT use has been marked.
1047 */
1048void
1049ieee80211_ht_node_cleanup(struct ieee80211_node *ni)
1050{
1051 struct ieee80211com *ic = ni->ni_ic;
1052 int i;
1053
1054 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node"));
1055
1056 /* XXX optimize this */
1057 for (i = 0; i < WME_NUM_AC; i++) {
1058 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i];
1059 if (tap->txa_flags & IEEE80211_AGGR_SETUP)
1060 ampdu_tx_stop(tap);
1061 }
1062 for (i = 0; i < WME_NUM_TID; i++)
1063 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]);
1064
1065 ni->ni_htcap = 0;
1066 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL;
1067}
1068
1069/*
1070 * Age out HT resources for a station.
1071 */
1072void
1073ieee80211_ht_node_age(struct ieee80211_node *ni)
1074{
1075#ifdef IEEE80211_AMPDU_AGE
1076 struct ieee80211vap *vap = ni->ni_vap;
1077 uint8_t tid;
1078#endif
1079
1080 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1081
1082#ifdef IEEE80211_AMPDU_AGE
1083 for (tid = 0; tid < WME_NUM_TID; tid++) {
1084 struct ieee80211_rx_ampdu *rap;
1085
1086 rap = &ni->ni_rx_ampdu[tid];
1087 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0)
1088 continue;
1089 if (rap->rxa_qframes == 0)
1090 continue;
1091 /*
1092 * Check for frames sitting too long in the reorder queue.
1093 * See above for more details on what's happening here.
1094 */
1095 /* XXX honor batimeout? */
1096 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1097 /*
1098 * Too long since we received the first
1099 * frame; flush the reorder buffer.
1100 */
1101 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes;
1102 ampdu_rx_flush(ni, rap);
1103 }
1104 }
1105#endif /* IEEE80211_AMPDU_AGE */
1106}
1107
1108static struct ieee80211_channel *
1109findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags)
1110{
1111 return ieee80211_find_channel(ic, c->ic_freq,
1112 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags);
1113}
1114
1115/*
1116 * Adjust a channel to be HT/non-HT according to the vap's configuration.
1117 */
1118struct ieee80211_channel *
1119ieee80211_ht_adjust_channel(struct ieee80211com *ic,
1120 struct ieee80211_channel *chan, int flags)
1121{
1122 struct ieee80211_channel *c;
1123
1124 if (flags & IEEE80211_FHT_HT) {
1125 /* promote to HT if possible */
1126 if (flags & IEEE80211_FHT_USEHT40) {
1127 if (!IEEE80211_IS_CHAN_HT40(chan)) {
1128 /* NB: arbitrarily pick ht40+ over ht40- */
1129 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U);
1130 if (c == NULL)
1131 c = findhtchan(ic, chan,
1132 IEEE80211_CHAN_HT40D);
1133 if (c == NULL)
1134 c = findhtchan(ic, chan,
1135 IEEE80211_CHAN_HT20);
1136 if (c != NULL)
1137 chan = c;
1138 }
1139 } else if (!IEEE80211_IS_CHAN_HT20(chan)) {
1140 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20);
1141 if (c != NULL)
1142 chan = c;
1143 }
1144 } else if (IEEE80211_IS_CHAN_HT(chan)) {
1145 /* demote to legacy, HT use is disabled */
1146 c = ieee80211_find_channel(ic, chan->ic_freq,
1147 chan->ic_flags &~ IEEE80211_CHAN_HT);
1148 if (c != NULL)
1149 chan = c;
1150 }
1151 return chan;
1152}
1153
1154/*
1155 * Setup HT-specific state for a legacy WDS peer.
1156 */
1157void
1158ieee80211_ht_wds_init(struct ieee80211_node *ni)
1159{
1160 struct ieee80211vap *vap = ni->ni_vap;
1161 struct ieee80211_tx_ampdu *tap;
1162 int ac;
1163
1164 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested"));
1165
1166 /* XXX check scan cache in case peer has an ap and we have info */
1167 /*
1168 * If setup with a legacy channel; locate an HT channel.
1169 * Otherwise if the inherited channel (from a companion
1170 * AP) is suitable use it so we use the same location
1171 * for the extension channel).
1172 */
1173 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic,
1174 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan));
1175
1176 ni->ni_htcap = 0;
1177 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)
1178 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20;
1179 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) {
1180 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40;
1181 ni->ni_chw = 40;
1182 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
1183 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE;
1184 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
1185 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW;
1186 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)
1187 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40;
1188 } else {
1189 ni->ni_chw = 20;
1190 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE;
1191 }
1192 ni->ni_htctlchan = ni->ni_chan->ic_ieee;
1193 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
1194 ni->ni_flags |= IEEE80211_NODE_RIFS;
1195 /* XXX does it make sense to enable SMPS? */
1196
1197 ni->ni_htopmode = 0; /* XXX need protection state */
1198 ni->ni_htstbc = 0; /* XXX need info */
1199
1200 for (ac = 0; ac < WME_NUM_AC; ac++) {
1201 tap = &ni->ni_tx_ampdu[ac];
1202 tap->txa_ac = ac;
1203 }
1204 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */
1205 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1206}
1207
1208/*
1209 * Notify hostap vaps of a change in the HTINFO ie.
1210 */
1211static void
1212htinfo_notify(struct ieee80211com *ic)
1213{
1214 struct ieee80211vap *vap;
1215 int first = 1;
1216
1217 IEEE80211_LOCK_ASSERT(ic);
1218
1219 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1220 if (vap->iv_opmode != IEEE80211_M_HOSTAP)
1221 continue;
1222 if (vap->iv_state != IEEE80211_S_RUN ||
1223 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan))
1224 continue;
1225 if (first) {
1226 IEEE80211_NOTE(vap,
1227 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1228 vap->iv_bss,
1229 "HT bss occupancy change: %d sta, %d ht, "
1230 "%d ht40%s, HT protmode now 0x%x"
1231 , ic->ic_sta_assoc
1232 , ic->ic_ht_sta_assoc
1233 , ic->ic_ht40_sta_assoc
1234 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ?
1235 ", non-HT sta present" : ""
1236 , ic->ic_curhtprotmode);
1237 first = 0;
1238 }
1239 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO);
1240 }
1241}
1242
1243/*
1244 * Calculate HT protection mode from current
1245 * state and handle updates.
1246 */
1247static void
1248htinfo_update(struct ieee80211com *ic)
1249{
1250 uint8_t protmode;
1251
1252 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) {
1253 protmode = IEEE80211_HTINFO_OPMODE_MIXED
1254 | IEEE80211_HTINFO_NONHT_PRESENT;
1255 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) {
1256 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT
1257 | IEEE80211_HTINFO_NONHT_PRESENT;
1258 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
1259 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) &&
1260 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) {
1261 protmode = IEEE80211_HTINFO_OPMODE_HT20PR;
1262 } else {
1263 protmode = IEEE80211_HTINFO_OPMODE_PURE;
1264 }
1265 if (protmode != ic->ic_curhtprotmode) {
1266 ic->ic_curhtprotmode = protmode;
1267 htinfo_notify(ic);
1268 }
1269}
1270
1271/*
1272 * Handle an HT station joining a BSS.
1273 */
1274void
1275ieee80211_ht_node_join(struct ieee80211_node *ni)
1276{
1277 struct ieee80211com *ic = ni->ni_ic;
1278
1279 IEEE80211_LOCK_ASSERT(ic);
1280
1281 if (ni->ni_flags & IEEE80211_NODE_HT) {
1282 ic->ic_ht_sta_assoc++;
1283 if (ni->ni_chw == 40)
1284 ic->ic_ht40_sta_assoc++;
1285 }
1286 htinfo_update(ic);
1287}
1288
1289/*
1290 * Handle an HT station leaving a BSS.
1291 */
1292void
1293ieee80211_ht_node_leave(struct ieee80211_node *ni)
1294{
1295 struct ieee80211com *ic = ni->ni_ic;
1296
1297 IEEE80211_LOCK_ASSERT(ic);
1298
1299 if (ni->ni_flags & IEEE80211_NODE_HT) {
1300 ic->ic_ht_sta_assoc--;
1301 if (ni->ni_chw == 40)
1302 ic->ic_ht40_sta_assoc--;
1303 }
1304 htinfo_update(ic);
1305}
1306
1307/*
1308 * Public version of htinfo_update; used for processing
1309 * beacon frames from overlapping bss.
1310 *
1311 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED
1312 * (on receipt of a beacon that advertises MIXED) or
1313 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon
1314 * from an overlapping legacy bss). We treat MIXED with
1315 * a higher precedence than PROTOPT (i.e. we will not change
1316 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This
1317 * corresponds to how we handle things in htinfo_update.
1318 */
1319void
1320ieee80211_htprot_update(struct ieee80211com *ic, int protmode)
1321{
1322#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE)
1323 IEEE80211_LOCK(ic);
1324
1325 /* track non-HT station presence */
1326 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT,
1327 ("protmode 0x%x", protmode));
1328 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR;
1329 ic->ic_lastnonht = ticks;
1330
1331 if (protmode != ic->ic_curhtprotmode &&
1332 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED ||
1333 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) {
1334 /* push beacon update */
1335 ic->ic_curhtprotmode = protmode;
1336 htinfo_notify(ic);
1337 }
1338 IEEE80211_UNLOCK(ic);
1339#undef OPMODE
1340}
1341
1342/*
1343 * Time out presence of an overlapping bss with non-HT
1344 * stations. When operating in hostap mode we listen for
1345 * beacons from other stations and if we identify a non-HT
1346 * station is present we update the opmode field of the
1347 * HTINFO ie. To identify when all non-HT stations are
1348 * gone we time out this condition.
1349 */
1350void
1351ieee80211_ht_timeout(struct ieee80211com *ic)
1352{
1353 IEEE80211_LOCK_ASSERT(ic);
1354
1355 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) &&
1356 time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) {
1357#if 0
1358 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1359 "%s", "time out non-HT STA present on channel");
1360#endif
1361 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
1362 htinfo_update(ic);
1363 }
1364}
1365
1366/* unalligned little endian access */
1367#define LE_READ_2(p) \
1368 ((uint16_t) \
1369 ((((const uint8_t *)(p))[0] ) | \
1370 (((const uint8_t *)(p))[1] << 8)))
1371
1372/*
1373 * Process an 802.11n HT capabilities ie.
1374 */
1375void
1376ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie)
1377{
1378 if (ie[0] == IEEE80211_ELEMID_VENDOR) {
1379 /*
1380 * Station used Vendor OUI ie to associate;
1381 * mark the node so when we respond we'll use
1382 * the Vendor OUI's and not the standard ie's.
1383 */
1384 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT;
1385 ie += 4;
1386 } else
1387 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT;
1388
1389 ni->ni_htcap = LE_READ_2(ie +
1390 __offsetof(struct ieee80211_ie_htcap, hc_cap));
1391 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)];
1392}
1393
1394static void
1395htinfo_parse(struct ieee80211_node *ni,
1396 const struct ieee80211_ie_htinfo *htinfo)
1397{
1398 uint16_t w;
1399
1400 ni->ni_htctlchan = htinfo->hi_ctrlchannel;
1401 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN);
1402 w = LE_READ_2(&htinfo->hi_byte2);
1403 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE);
1404 w = LE_READ_2(&htinfo->hi_byte45);
1405 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS);
1406}
1407
1408/*
1409 * Parse an 802.11n HT info ie and save useful information
1410 * to the node state. Note this does not effect any state
1411 * changes such as for channel width change.
1412 */
1413void
1414ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie)
1415{
1416 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1417 ie += 4;
1418 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie);
1419}
1420
1421/*
1422 * Handle 11n channel switch. Use the received HT ie's to
1423 * identify the right channel to use. If we cannot locate it
1424 * in the channel table then fallback to legacy operation.
1425 * Note that we use this information to identify the node's
1426 * channel only; the caller is responsible for insuring any
1427 * required channel change is done (e.g. in sta mode when
1428 * parsing the contents of a beacon frame).
1429 */
1430static void
1431htinfo_update_chw(struct ieee80211_node *ni, int htflags)
1432{
1433 struct ieee80211com *ic = ni->ni_ic;
1434 struct ieee80211_channel *c;
1435 int chanflags;
1436
1437 chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags;
1438 if (chanflags != ni->ni_chan->ic_flags) {
1439 /* XXX not right for ht40- */
1440 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags);
1441 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) {
1442 /*
1443 * No HT40 channel entry in our table; fall back
1444 * to HT20 operation. This should not happen.
1445 */
1446 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20);
1447#if 0
1448 IEEE80211_NOTE(ni->ni_vap,
1449 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1450 "no HT40 channel (freq %u), falling back to HT20",
1451 ni->ni_chan->ic_freq);
1452#endif
1453 /* XXX stat */
1454 }
1455 if (c != NULL && c != ni->ni_chan) {
1456 IEEE80211_NOTE(ni->ni_vap,
1457 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1458 "switch station to HT%d channel %u/0x%x",
1459 IEEE80211_IS_CHAN_HT40(c) ? 40 : 20,
1460 c->ic_freq, c->ic_flags);
1461 ni->ni_chan = c;
1462 }
1463 /* NB: caller responsible for forcing any channel change */
1464 }
1465 /* update node's tx channel width */
1466 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20;
1467}
1468
1469/*
1470 * Update 11n MIMO PS state according to received htcap.
1471 */
1472static __inline int
1473htcap_update_mimo_ps(struct ieee80211_node *ni)
1474{
1475 uint16_t oflags = ni->ni_flags;
1476
1477 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) {
1478 case IEEE80211_HTCAP_SMPS_DYNAMIC:
1479 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1480 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
1481 break;
1482 case IEEE80211_HTCAP_SMPS_ENA:
1483 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1484 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1485 break;
1486 case IEEE80211_HTCAP_SMPS_OFF:
1487 default: /* disable on rx of reserved value */
1488 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
1489 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1490 break;
1491 }
1492 return (oflags ^ ni->ni_flags);
1493}
1494
1495/*
1496 * Update short GI state according to received htcap
1497 * and local settings.
1498 */
1499static __inline void
1500htcap_update_shortgi(struct ieee80211_node *ni)
1501{
1502 struct ieee80211vap *vap = ni->ni_vap;
1503
1504 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40);
1505 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) &&
1506 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20))
1507 ni->ni_flags |= IEEE80211_NODE_SGI20;
1508 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) &&
1509 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40))
1510 ni->ni_flags |= IEEE80211_NODE_SGI40;
1511}
1512
1513/*
1514 * Parse and update HT-related state extracted from
1515 * the HT cap and info ie's.
1516 */
1517void
1518ieee80211_ht_updateparams(struct ieee80211_node *ni,
1519 const uint8_t *htcapie, const uint8_t *htinfoie)
1520{
1521 struct ieee80211vap *vap = ni->ni_vap;
1522 const struct ieee80211_ie_htinfo *htinfo;
1523 int htflags;
1524
1525 ieee80211_parse_htcap(ni, htcapie);
1526 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1527 htcap_update_mimo_ps(ni);
1528 htcap_update_shortgi(ni);
1529
1530 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR)
1531 htinfoie += 4;
1532 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
1533 htinfo_parse(ni, htinfo);
1534
1535 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1536 IEEE80211_CHAN_HT20 : 0;
1537 /* NB: honor operating mode constraint */
1538 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) &&
1539 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1540 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE)
1541 htflags = IEEE80211_CHAN_HT40U;
1542 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW)
1543 htflags = IEEE80211_CHAN_HT40D;
1544 }
1545 htinfo_update_chw(ni, htflags);
1546
1547 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) &&
1548 (vap->iv_flags_ht & IEEE80211_FHT_RIFS))
1549 ni->ni_flags |= IEEE80211_NODE_RIFS;
1550 else
1551 ni->ni_flags &= ~IEEE80211_NODE_RIFS;
1552}
1553
1554/*
1555 * Parse and update HT-related state extracted from the HT cap ie
1556 * for a station joining an HT BSS.
1557 */
1558void
1559ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie)
1560{
1561 struct ieee80211vap *vap = ni->ni_vap;
1562 int htflags;
1563
1564 ieee80211_parse_htcap(ni, htcapie);
1565 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1566 htcap_update_mimo_ps(ni);
1567 htcap_update_shortgi(ni);
1568
1569 /* NB: honor operating mode constraint */
1570 /* XXX 40 MHz intolerant */
1571 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1572 IEEE80211_CHAN_HT20 : 0;
1573 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) &&
1574 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1575 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan))
1576 htflags = IEEE80211_CHAN_HT40U;
1577 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan))
1578 htflags = IEEE80211_CHAN_HT40D;
1579 }
1580 htinfo_update_chw(ni, htflags);
1581}
1582
1583/*
1584 * Install received HT rate set by parsing the HT cap ie.
1585 */
1586int
1587ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags)
1588{
1589 struct ieee80211com *ic = ni->ni_ic;
1590 struct ieee80211vap *vap = ni->ni_vap;
1591 const struct ieee80211_ie_htcap *htcap;
1592 struct ieee80211_htrateset *rs;
1593 int i, maxequalmcs, maxunequalmcs;
1594
1595 maxequalmcs = ic->ic_txstream * 8 - 1;
1596 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
1597 if (ic->ic_txstream >= 2)
1598 maxunequalmcs = 38;
1599 if (ic->ic_txstream >= 3)
1600 maxunequalmcs = 52;
1601 if (ic->ic_txstream >= 4)
1602 maxunequalmcs = 76;
1603 } else
1604 maxunequalmcs = 0;
1605
1606 rs = &ni->ni_htrates;
1607 memset(rs, 0, sizeof(*rs));
1608 if (ie != NULL) {
1609 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1610 ie += 4;
1611 htcap = (const struct ieee80211_ie_htcap *) ie;
1612 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1613 if (isclr(htcap->hc_mcsset, i))
1614 continue;
1615 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) {
1616 IEEE80211_NOTE(vap,
1617 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1618 "WARNING, HT rate set too large; only "
1619 "using %u rates", IEEE80211_HTRATE_MAXSIZE);
1620 vap->iv_stats.is_rx_rstoobig++;
1621 break;
1622 }
1623 if (i <= 31 && i > maxequalmcs)
1624 continue;
1625 if (i == 32 &&
1626 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
1627 continue;
1628 if (i > 32 && i > maxunequalmcs)
1629 continue;
1630 rs->rs_rates[rs->rs_nrates++] = i;
1631 }
1632 }
1633 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags);
1634}
1635
1636/*
1637 * Mark rates in a node's HT rate set as basic according
1638 * to the information in the supplied HT info ie.
1639 */
1640void
1641ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie)
1642{
1643 const struct ieee80211_ie_htinfo *htinfo;
1644 struct ieee80211_htrateset *rs;
1645 int i, j;
1646
1647 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1648 ie += 4;
1649 htinfo = (const struct ieee80211_ie_htinfo *) ie;
1650 rs = &ni->ni_htrates;
1651 if (rs->rs_nrates == 0) {
1652 IEEE80211_NOTE(ni->ni_vap,
1653 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1654 "%s", "WARNING, empty HT rate set");
1655 return;
1656 }
1657 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1658 if (isclr(htinfo->hi_basicmcsset, i))
1659 continue;
1660 for (j = 0; j < rs->rs_nrates; j++)
1661 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i)
1662 rs->rs_rates[j] |= IEEE80211_RATE_BASIC;
1663 }
1664}
1665
1666static void
1667ampdu_tx_setup(struct ieee80211_tx_ampdu *tap)
1668{
1669 callout_init(&tap->txa_timer, CALLOUT_MPSAFE);
1670 tap->txa_flags |= IEEE80211_AGGR_SETUP;
1671}
1672
1673static void
1674ampdu_tx_stop(struct ieee80211_tx_ampdu *tap)
1675{
1676 struct ieee80211_node *ni = tap->txa_ni;
1677 struct ieee80211com *ic = ni->ni_ic;
1678
1679 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP,
1680 ("txa_flags 0x%x ac %d", tap->txa_flags, tap->txa_ac));
1681
1682 /*
1683 * Stop BA stream if setup so driver has a chance
1684 * to reclaim any resources it might have allocated.
1685 */
1686 ic->ic_addba_stop(ni, tap);
1687 /*
1688 * Stop any pending BAR transmit.
1689 */
1690 bar_stop_timer(tap);
1691
1692 tap->txa_lastsample = 0;
1693 tap->txa_avgpps = 0;
1694 /* NB: clearing NAK means we may re-send ADDBA */
1695 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK);
1696}
1697
|
| 1698/*
1699 * ADDBA response timeout.
1700 *
1701 * If software aggregation and per-TID queue management was done here,
1702 * that queue would be unpaused after the ADDBA timeout occurs.
1703 */
|
1694static void
1695addba_timeout(void *arg)
1696{
1697 struct ieee80211_tx_ampdu *tap = arg;
| 1704static void
1705addba_timeout(void *arg)
1706{
1707 struct ieee80211_tx_ampdu *tap = arg;
|
| 1708 struct ieee80211_node *ni = tap->txa_ni;
1709 struct ieee80211com *ic = ni->ni_ic;
|
1698
1699 /* XXX ? */
1700 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1701 tap->txa_attempts++;
| 1710
1711 /* XXX ? */
1712 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1713 tap->txa_attempts++;
|
| 1714 ic->ic_addba_response_timeout(ni, tap);
|
1702}
1703
1704static void
1705addba_start_timeout(struct ieee80211_tx_ampdu *tap)
1706{
1707 /* XXX use CALLOUT_PENDING instead? */
1708 callout_reset(&tap->txa_timer, ieee80211_addba_timeout,
1709 addba_timeout, tap);
1710 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND;
1711 tap->txa_nextrequest = ticks + ieee80211_addba_timeout;
1712}
1713
1714static void
1715addba_stop_timeout(struct ieee80211_tx_ampdu *tap)
1716{
1717 /* XXX use CALLOUT_PENDING instead? */
1718 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) {
1719 callout_stop(&tap->txa_timer);
1720 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1721 }
1722}
1723
| 1715}
1716
1717static void
1718addba_start_timeout(struct ieee80211_tx_ampdu *tap)
1719{
1720 /* XXX use CALLOUT_PENDING instead? */
1721 callout_reset(&tap->txa_timer, ieee80211_addba_timeout,
1722 addba_timeout, tap);
1723 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND;
1724 tap->txa_nextrequest = ticks + ieee80211_addba_timeout;
1725}
1726
1727static void
1728addba_stop_timeout(struct ieee80211_tx_ampdu *tap)
1729{
1730 /* XXX use CALLOUT_PENDING instead? */
1731 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) {
1732 callout_stop(&tap->txa_timer);
1733 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1734 }
1735}
1736
|
| 1737static void
1738null_addba_response_timeout(struct ieee80211_node *ni,
1739 struct ieee80211_tx_ampdu *tap)
1740{
1741}
1742
|
1724/*
1725 * Default method for requesting A-MPDU tx aggregation.
1726 * We setup the specified state block and start a timer
1727 * to wait for an ADDBA response frame.
1728 */
1729static int
1730ieee80211_addba_request(struct ieee80211_node *ni,
1731 struct ieee80211_tx_ampdu *tap,
1732 int dialogtoken, int baparamset, int batimeout)
1733{
1734 int bufsiz;
1735
1736 /* XXX locking */
1737 tap->txa_token = dialogtoken;
1738 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE;
1739 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1740 tap->txa_wnd = (bufsiz == 0) ?
1741 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1742 addba_start_timeout(tap);
1743 return 1;
1744}
1745
1746/*
1747 * Default method for processing an A-MPDU tx aggregation
1748 * response. We shutdown any pending timer and update the
1749 * state block according to the reply.
1750 */
1751static int
1752ieee80211_addba_response(struct ieee80211_node *ni,
1753 struct ieee80211_tx_ampdu *tap,
1754 int status, int baparamset, int batimeout)
1755{
1756 int bufsiz, tid;
1757
1758 /* XXX locking */
1759 addba_stop_timeout(tap);
1760 if (status == IEEE80211_STATUS_SUCCESS) {
1761 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1762 /* XXX override our request? */
1763 tap->txa_wnd = (bufsiz == 0) ?
1764 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1765 /* XXX AC/TID */
1766 tid = MS(baparamset, IEEE80211_BAPS_TID);
1767 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
1768 tap->txa_attempts = 0;
1769 } else {
1770 /* mark tid so we don't try again */
1771 tap->txa_flags |= IEEE80211_AGGR_NAK;
1772 }
1773 return 1;
1774}
1775
1776/*
1777 * Default method for stopping A-MPDU tx aggregation.
1778 * Any timer is cleared and we drain any pending frames.
1779 */
1780static void
1781ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
1782{
1783 /* XXX locking */
1784 addba_stop_timeout(tap);
1785 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) {
1786 /* XXX clear aggregation queue */
1787 tap->txa_flags &= ~IEEE80211_AGGR_RUNNING;
1788 }
1789 tap->txa_attempts = 0;
1790}
1791
1792/*
1793 * Process a received action frame using the default aggregation
1794 * policy. We intercept ADDBA-related frames and use them to
1795 * update our aggregation state. All other frames are passed up
1796 * for processing by ieee80211_recv_action.
1797 */
1798static int
1799ht_recv_action_ba_addba_request(struct ieee80211_node *ni,
1800 const struct ieee80211_frame *wh,
1801 const uint8_t *frm, const uint8_t *efrm)
1802{
1803 struct ieee80211com *ic = ni->ni_ic;
1804 struct ieee80211vap *vap = ni->ni_vap;
1805 struct ieee80211_rx_ampdu *rap;
1806 uint8_t dialogtoken;
1807 uint16_t baparamset, batimeout, baseqctl;
1808 uint16_t args[5];
1809 int tid;
1810
1811 dialogtoken = frm[2];
1812 baparamset = LE_READ_2(frm+3);
1813 batimeout = LE_READ_2(frm+5);
1814 baseqctl = LE_READ_2(frm+7);
1815
1816 tid = MS(baparamset, IEEE80211_BAPS_TID);
1817
1818 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1819 "recv ADDBA request: dialogtoken %u baparamset 0x%x "
1820 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d",
1821 dialogtoken, baparamset,
1822 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ),
1823 batimeout,
1824 MS(baseqctl, IEEE80211_BASEQ_START),
1825 MS(baseqctl, IEEE80211_BASEQ_FRAG));
1826
1827 rap = &ni->ni_rx_ampdu[tid];
1828
1829 /* Send ADDBA response */
1830 args[0] = dialogtoken;
1831 /*
1832 * NB: We ack only if the sta associated with HT and
1833 * the ap is configured to do AMPDU rx (the latter
1834 * violates the 11n spec and is mostly for testing).
1835 */
1836 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) &&
1837 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) {
1838 /* XXX handle ampdu_rx_start failure */
1839 ic->ic_ampdu_rx_start(ni, rap,
1840 baparamset, batimeout, baseqctl);
1841
1842 args[1] = IEEE80211_STATUS_SUCCESS;
1843 } else {
1844 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1845 ni, "reject ADDBA request: %s",
1846 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ?
1847 "administratively disabled" :
1848 "not negotiated for station");
1849 vap->iv_stats.is_addba_reject++;
1850 args[1] = IEEE80211_STATUS_UNSPECIFIED;
1851 }
1852 /* XXX honor rap flags? */
1853 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
1854 | SM(tid, IEEE80211_BAPS_TID)
1855 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ)
1856 ;
1857 args[3] = 0;
1858 args[4] = 0;
1859 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
1860 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args);
1861 return 0;
1862}
1863
1864static int
1865ht_recv_action_ba_addba_response(struct ieee80211_node *ni,
1866 const struct ieee80211_frame *wh,
1867 const uint8_t *frm, const uint8_t *efrm)
1868{
1869 struct ieee80211com *ic = ni->ni_ic;
1870 struct ieee80211vap *vap = ni->ni_vap;
1871 struct ieee80211_tx_ampdu *tap;
1872 uint8_t dialogtoken, policy;
1873 uint16_t baparamset, batimeout, code;
1874 int tid, ac, bufsiz;
1875
1876 dialogtoken = frm[2];
1877 code = LE_READ_2(frm+3);
1878 baparamset = LE_READ_2(frm+5);
1879 tid = MS(baparamset, IEEE80211_BAPS_TID);
1880 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1881 policy = MS(baparamset, IEEE80211_BAPS_POLICY);
1882 batimeout = LE_READ_2(frm+7);
1883
1884 ac = TID_TO_WME_AC(tid);
1885 tap = &ni->ni_tx_ampdu[ac];
1886 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1887 IEEE80211_DISCARD_MAC(vap,
1888 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1889 ni->ni_macaddr, "ADDBA response",
1890 "no pending ADDBA, tid %d dialogtoken %u "
1891 "code %d", tid, dialogtoken, code);
1892 vap->iv_stats.is_addba_norequest++;
1893 return 0;
1894 }
1895 if (dialogtoken != tap->txa_token) {
1896 IEEE80211_DISCARD_MAC(vap,
1897 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1898 ni->ni_macaddr, "ADDBA response",
1899 "dialogtoken mismatch: waiting for %d, "
1900 "received %d, tid %d code %d",
1901 tap->txa_token, dialogtoken, tid, code);
1902 vap->iv_stats.is_addba_badtoken++;
1903 return 0;
1904 }
1905 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */
1906 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) {
1907 IEEE80211_DISCARD_MAC(vap,
1908 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1909 ni->ni_macaddr, "ADDBA response",
1910 "policy mismatch: expecting %s, "
1911 "received %s, tid %d code %d",
1912 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE,
1913 policy, tid, code);
1914 vap->iv_stats.is_addba_badpolicy++;
1915 return 0;
1916 }
1917#if 0
1918 /* XXX we take MIN in ieee80211_addba_response */
1919 if (bufsiz > IEEE80211_AGGR_BAWMAX) {
1920 IEEE80211_DISCARD_MAC(vap,
1921 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1922 ni->ni_macaddr, "ADDBA response",
1923 "BA window too large: max %d, "
1924 "received %d, tid %d code %d",
1925 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code);
1926 vap->iv_stats.is_addba_badbawinsize++;
1927 return 0;
1928 }
1929#endif
1930 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1931 "recv ADDBA response: dialogtoken %u code %d "
1932 "baparamset 0x%x (tid %d bufsiz %d) batimeout %d",
1933 dialogtoken, code, baparamset, tid, bufsiz,
1934 batimeout);
1935 ic->ic_addba_response(ni, tap, code, baparamset, batimeout);
1936 return 0;
1937}
1938
1939static int
1940ht_recv_action_ba_delba(struct ieee80211_node *ni,
1941 const struct ieee80211_frame *wh,
1942 const uint8_t *frm, const uint8_t *efrm)
1943{
1944 struct ieee80211com *ic = ni->ni_ic;
1945 struct ieee80211_rx_ampdu *rap;
1946 struct ieee80211_tx_ampdu *tap;
1947 uint16_t baparamset, code;
1948 int tid, ac;
1949
1950 baparamset = LE_READ_2(frm+2);
1951 code = LE_READ_2(frm+4);
1952
1953 tid = MS(baparamset, IEEE80211_DELBAPS_TID);
1954
1955 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1956 "recv DELBA: baparamset 0x%x (tid %d initiator %d) "
1957 "code %d", baparamset, tid,
1958 MS(baparamset, IEEE80211_DELBAPS_INIT), code);
1959
1960 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) {
1961 ac = TID_TO_WME_AC(tid);
1962 tap = &ni->ni_tx_ampdu[ac];
1963 ic->ic_addba_stop(ni, tap);
1964 } else {
1965 rap = &ni->ni_rx_ampdu[tid];
1966 ic->ic_ampdu_rx_stop(ni, rap);
1967 }
1968 return 0;
1969}
1970
1971static int
1972ht_recv_action_ht_txchwidth(struct ieee80211_node *ni,
1973 const struct ieee80211_frame *wh,
1974 const uint8_t *frm, const uint8_t *efrm)
1975{
1976 int chw;
1977
1978 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20;
1979
1980 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1981 "%s: HT txchwidth, width %d%s",
1982 __func__, chw, ni->ni_chw != chw ? "*" : "");
1983 if (chw != ni->ni_chw) {
1984 ni->ni_chw = chw;
1985 /* XXX notify on change */
1986 }
1987 return 0;
1988}
1989
1990static int
1991ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni,
1992 const struct ieee80211_frame *wh,
1993 const uint8_t *frm, const uint8_t *efrm)
1994{
1995 const struct ieee80211_action_ht_mimopowersave *mps =
1996 (const struct ieee80211_action_ht_mimopowersave *) frm;
1997
1998 /* XXX check iv_htcaps */
1999 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA)
2000 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
2001 else
2002 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
2003 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE)
2004 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
2005 else
2006 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
2007 /* XXX notify on change */
2008 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2009 "%s: HT MIMO PS (%s%s)", __func__,
2010 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off",
2011 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : ""
2012 );
2013 return 0;
2014}
2015
2016/*
2017 * Transmit processing.
2018 */
2019
2020/*
2021 * Check if A-MPDU should be requested/enabled for a stream.
2022 * We require a traffic rate above a per-AC threshold and we
2023 * also handle backoff from previous failed attempts.
2024 *
2025 * Drivers may override this method to bring in information
2026 * such as link state conditions in making the decision.
2027 */
2028static int
2029ieee80211_ampdu_enable(struct ieee80211_node *ni,
2030 struct ieee80211_tx_ampdu *tap)
2031{
2032 struct ieee80211vap *vap = ni->ni_vap;
2033
2034 if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac])
2035 return 0;
2036 /* XXX check rssi? */
2037 if (tap->txa_attempts >= ieee80211_addba_maxtries &&
2038 ticks < tap->txa_nextrequest) {
2039 /*
2040 * Don't retry too often; txa_nextrequest is set
2041 * to the minimum interval we'll retry after
2042 * ieee80211_addba_maxtries failed attempts are made.
2043 */
2044 return 0;
2045 }
2046 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
2047 "enable AMPDU on %s, avgpps %d pkts %d",
2048 ieee80211_wme_acnames[tap->txa_ac], tap->txa_avgpps, tap->txa_pkts);
2049 return 1;
2050}
2051
2052/*
2053 * Request A-MPDU tx aggregation. Setup local state and
2054 * issue an ADDBA request. BA use will only happen after
2055 * the other end replies with ADDBA response.
2056 */
2057int
2058ieee80211_ampdu_request(struct ieee80211_node *ni,
2059 struct ieee80211_tx_ampdu *tap)
2060{
2061 struct ieee80211com *ic = ni->ni_ic;
2062 uint16_t args[5];
2063 int tid, dialogtoken;
2064 static int tokens = 0; /* XXX */
2065
2066 /* XXX locking */
2067 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2068 /* do deferred setup of state */
2069 ampdu_tx_setup(tap);
2070 }
2071 /* XXX hack for not doing proper locking */
2072 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2073
2074 dialogtoken = (tokens+1) % 63; /* XXX */
2075 tid = WME_AC_TO_TID(tap->txa_ac);
2076 tap->txa_start = ni->ni_txseqs[tid];
2077
2078 args[0] = dialogtoken;
2079 args[1] = 0; /* NB: status code not used */
2080 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2081 | SM(tid, IEEE80211_BAPS_TID)
2082 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ)
2083 ;
2084 args[3] = 0; /* batimeout */
2085 /* NB: do first so there's no race against reply */
2086 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) {
2087 /* unable to setup state, don't make request */
2088 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2089 ni, "%s: could not setup BA stream for AC %d",
2090 __func__, tap->txa_ac);
2091 /* defer next try so we don't slam the driver with requests */
2092 tap->txa_attempts = ieee80211_addba_maxtries;
2093 /* NB: check in case driver wants to override */
2094 if (tap->txa_nextrequest <= ticks)
2095 tap->txa_nextrequest = ticks + ieee80211_addba_backoff;
2096 return 0;
2097 }
2098 tokens = dialogtoken; /* allocate token */
2099 /* NB: after calling ic_addba_request so driver can set txa_start */
2100 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START)
2101 | SM(0, IEEE80211_BASEQ_FRAG)
2102 ;
2103 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2104 IEEE80211_ACTION_BA_ADDBA_REQUEST, args);
2105}
2106
2107/*
2108 * Terminate an AMPDU tx stream. State is reclaimed
2109 * and the peer notified with a DelBA Action frame.
2110 */
2111void
2112ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
2113 int reason)
2114{
2115 struct ieee80211com *ic = ni->ni_ic;
2116 struct ieee80211vap *vap = ni->ni_vap;
2117 uint16_t args[4];
2118
2119 /* XXX locking */
2120 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2121 if (IEEE80211_AMPDU_RUNNING(tap)) {
2122 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2123 ni, "%s: stop BA stream for AC %d (reason %d)",
2124 __func__, tap->txa_ac, reason);
2125 vap->iv_stats.is_ampdu_stop++;
2126
2127 ic->ic_addba_stop(ni, tap);
2128 args[0] = WME_AC_TO_TID(tap->txa_ac);
2129 args[1] = IEEE80211_DELBAPS_INIT;
2130 args[2] = reason; /* XXX reason code */
2131 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2132 IEEE80211_ACTION_BA_DELBA, args);
2133 } else {
2134 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2135 ni, "%s: BA stream for AC %d not running (reason %d)",
2136 __func__, tap->txa_ac, reason);
2137 vap->iv_stats.is_ampdu_stop_failed++;
2138 }
2139}
2140
2141static void
2142bar_timeout(void *arg)
2143{
2144 struct ieee80211_tx_ampdu *tap = arg;
2145 struct ieee80211_node *ni = tap->txa_ni;
2146
2147 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0,
2148 ("bar/addba collision, flags 0x%x", tap->txa_flags));
2149
2150 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2151 ni, "%s: tid %u flags 0x%x attempts %d", __func__,
2152 tap->txa_ac, tap->txa_flags, tap->txa_attempts);
2153
2154 /* guard against race with bar_tx_complete */
2155 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2156 return;
2157 /* XXX ? */
2158 if (tap->txa_attempts >= ieee80211_bar_maxtries)
2159 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT);
2160 else
2161 ieee80211_send_bar(ni, tap, tap->txa_seqpending);
2162}
2163
2164static void
2165bar_start_timer(struct ieee80211_tx_ampdu *tap)
2166{
2167 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap);
2168}
2169
2170static void
2171bar_stop_timer(struct ieee80211_tx_ampdu *tap)
2172{
2173 callout_stop(&tap->txa_timer);
2174}
2175
2176static void
2177bar_tx_complete(struct ieee80211_node *ni, void *arg, int status)
2178{
2179 struct ieee80211_tx_ampdu *tap = arg;
2180
2181 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2182 ni, "%s: tid %u flags 0x%x pending %d status %d",
2183 __func__, tap->txa_ac, tap->txa_flags,
2184 callout_pending(&tap->txa_timer), status);
2185
2186 /* XXX locking */
2187 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) &&
2188 callout_pending(&tap->txa_timer)) {
2189 struct ieee80211com *ic = ni->ni_ic;
2190
2191 if (status) /* ACK'd */
2192 bar_stop_timer(tap);
2193 ic->ic_bar_response(ni, tap, status);
2194 /* NB: just let timer expire so we pace requests */
2195 }
2196}
2197
2198static void
2199ieee80211_bar_response(struct ieee80211_node *ni,
2200 struct ieee80211_tx_ampdu *tap, int status)
2201{
2202
2203 if (status != 0) { /* got ACK */
2204 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2205 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u",
2206 tap->txa_start,
2207 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1),
2208 tap->txa_qframes, tap->txa_seqpending,
2209 WME_AC_TO_TID(tap->txa_ac));
2210
2211 /* NB: timer already stopped in bar_tx_complete */
2212 tap->txa_start = tap->txa_seqpending;
2213 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2214 }
2215}
2216
2217/*
2218 * Transmit a BAR frame to the specified node. The
2219 * BAR contents are drawn from the supplied aggregation
2220 * state associated with the node.
2221 *
2222 * NB: we only handle immediate ACK w/ compressed bitmap.
2223 */
2224int
2225ieee80211_send_bar(struct ieee80211_node *ni,
2226 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq)
2227{
2228#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2229 struct ieee80211vap *vap = ni->ni_vap;
2230 struct ieee80211com *ic = ni->ni_ic;
2231 struct ieee80211_frame_bar *bar;
2232 struct mbuf *m;
2233 uint16_t barctl, barseqctl;
2234 uint8_t *frm;
2235 int tid, ret;
2236
2237 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) {
2238 /* no ADDBA response, should not happen */
2239 /* XXX stat+msg */
2240 return EINVAL;
2241 }
2242 /* XXX locking */
2243 bar_stop_timer(tap);
2244
2245 ieee80211_ref_node(ni);
2246
2247 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar));
2248 if (m == NULL)
2249 senderr(ENOMEM, is_tx_nobuf);
2250
2251 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) {
2252 m_freem(m);
2253 senderr(ENOMEM, is_tx_nobuf); /* XXX */
2254 /* NOTREACHED */
2255 }
2256
2257 bar = mtod(m, struct ieee80211_frame_bar *);
2258 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2259 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR;
2260 bar->i_fc[1] = 0;
2261 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr);
2262 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr);
2263
2264 tid = WME_AC_TO_TID(tap->txa_ac);
2265 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ?
2266 0 : IEEE80211_BAR_NOACK)
2267 | IEEE80211_BAR_COMP
2268 | SM(tid, IEEE80211_BAR_TID)
2269 ;
2270 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START);
2271 /* NB: known to have proper alignment */
2272 bar->i_ctl = htole16(barctl);
2273 bar->i_seq = htole16(barseqctl);
2274 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar);
2275
2276 M_WME_SETAC(m, WME_AC_VO);
2277
2278 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */
2279
2280 /* XXX locking */
2281 /* init/bump attempts counter */
2282 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2283 tap->txa_attempts = 1;
2284 else
2285 tap->txa_attempts++;
2286 tap->txa_seqpending = seq;
2287 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2288
2289 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2290 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)",
2291 tid, barctl, seq, tap->txa_attempts);
2292
2293 ret = ic->ic_raw_xmit(ni, m, NULL);
2294 if (ret != 0) {
2295 /* xmit failed, clear state flag */
2296 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2297 goto bad;
2298 }
2299 /* XXX hack against tx complete happening before timer is started */
2300 if (tap->txa_flags & IEEE80211_AGGR_BARPEND)
2301 bar_start_timer(tap);
2302 return 0;
2303bad:
2304 ieee80211_free_node(ni);
2305 return ret;
2306#undef senderr
2307}
2308
2309static int
2310ht_action_output(struct ieee80211_node *ni, struct mbuf *m)
2311{
2312 struct ieee80211_bpf_params params;
2313
2314 memset(¶ms, 0, sizeof(params));
2315 params.ibp_pri = WME_AC_VO;
2316 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2317 /* NB: we know all frames are unicast */
2318 params.ibp_try0 = ni->ni_txparms->maxretry;
2319 params.ibp_power = ni->ni_txpower;
2320 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
2321 ¶ms);
2322}
2323
2324#define ADDSHORT(frm, v) do { \
2325 frm[0] = (v) & 0xff; \
2326 frm[1] = (v) >> 8; \
2327 frm += 2; \
2328} while (0)
2329
2330/*
2331 * Send an action management frame. The arguments are stuff
2332 * into a frame without inspection; the caller is assumed to
2333 * prepare them carefully (e.g. based on the aggregation state).
2334 */
2335static int
2336ht_send_action_ba_addba(struct ieee80211_node *ni,
2337 int category, int action, void *arg0)
2338{
2339 struct ieee80211vap *vap = ni->ni_vap;
2340 struct ieee80211com *ic = ni->ni_ic;
2341 uint16_t *args = arg0;
2342 struct mbuf *m;
2343 uint8_t *frm;
2344
2345 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2346 "send ADDBA %s: dialogtoken %d status %d "
2347 "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x",
2348 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ?
2349 "request" : "response",
2350 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID),
2351 args[3], args[4]);
2352
2353 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2354 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2355 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2356 ieee80211_ref_node(ni);
2357
2358 m = ieee80211_getmgtframe(&frm,
2359 ic->ic_headroom + sizeof(struct ieee80211_frame),
2360 sizeof(uint16_t) /* action+category */
2361 /* XXX may action payload */
2362 + sizeof(struct ieee80211_action_ba_addbaresponse)
2363 );
2364 if (m != NULL) {
2365 *frm++ = category;
2366 *frm++ = action;
2367 *frm++ = args[0]; /* dialog token */
2368 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE)
2369 ADDSHORT(frm, args[1]); /* status code */
2370 ADDSHORT(frm, args[2]); /* baparamset */
2371 ADDSHORT(frm, args[3]); /* batimeout */
2372 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST)
2373 ADDSHORT(frm, args[4]); /* baseqctl */
2374 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2375 return ht_action_output(ni, m);
2376 } else {
2377 vap->iv_stats.is_tx_nobuf++;
2378 ieee80211_free_node(ni);
2379 return ENOMEM;
2380 }
2381}
2382
2383static int
2384ht_send_action_ba_delba(struct ieee80211_node *ni,
2385 int category, int action, void *arg0)
2386{
2387 struct ieee80211vap *vap = ni->ni_vap;
2388 struct ieee80211com *ic = ni->ni_ic;
2389 uint16_t *args = arg0;
2390 struct mbuf *m;
2391 uint16_t baparamset;
2392 uint8_t *frm;
2393
2394 baparamset = SM(args[0], IEEE80211_DELBAPS_TID)
2395 | args[1]
2396 ;
2397 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2398 "send DELBA action: tid %d, initiator %d reason %d",
2399 args[0], args[1], args[2]);
2400
2401 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2402 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2403 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2404 ieee80211_ref_node(ni);
2405
2406 m = ieee80211_getmgtframe(&frm,
2407 ic->ic_headroom + sizeof(struct ieee80211_frame),
2408 sizeof(uint16_t) /* action+category */
2409 /* XXX may action payload */
2410 + sizeof(struct ieee80211_action_ba_addbaresponse)
2411 );
2412 if (m != NULL) {
2413 *frm++ = category;
2414 *frm++ = action;
2415 ADDSHORT(frm, baparamset);
2416 ADDSHORT(frm, args[2]); /* reason code */
2417 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2418 return ht_action_output(ni, m);
2419 } else {
2420 vap->iv_stats.is_tx_nobuf++;
2421 ieee80211_free_node(ni);
2422 return ENOMEM;
2423 }
2424}
2425
2426static int
2427ht_send_action_ht_txchwidth(struct ieee80211_node *ni,
2428 int category, int action, void *arg0)
2429{
2430 struct ieee80211vap *vap = ni->ni_vap;
2431 struct ieee80211com *ic = ni->ni_ic;
2432 struct mbuf *m;
2433 uint8_t *frm;
2434
2435 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2436 "send HT txchwidth: width %d",
2437 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20);
2438
2439 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2440 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2441 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2442 ieee80211_ref_node(ni);
2443
2444 m = ieee80211_getmgtframe(&frm,
2445 ic->ic_headroom + sizeof(struct ieee80211_frame),
2446 sizeof(uint16_t) /* action+category */
2447 /* XXX may action payload */
2448 + sizeof(struct ieee80211_action_ba_addbaresponse)
2449 );
2450 if (m != NULL) {
2451 *frm++ = category;
2452 *frm++ = action;
2453 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ?
2454 IEEE80211_A_HT_TXCHWIDTH_2040 :
2455 IEEE80211_A_HT_TXCHWIDTH_20;
2456 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2457 return ht_action_output(ni, m);
2458 } else {
2459 vap->iv_stats.is_tx_nobuf++;
2460 ieee80211_free_node(ni);
2461 return ENOMEM;
2462 }
2463}
2464#undef ADDSHORT
2465
2466/*
2467 * Construct the MCS bit mask for inclusion in an HT capabilities
2468 * information element.
2469 */
2470static void
2471ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm)
2472{
2473 int i;
2474 uint8_t txparams;
2475
2476 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4),
2477 ("ic_rxstream %d out of range", ic->ic_rxstream));
2478 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4),
2479 ("ic_txstream %d out of range", ic->ic_txstream));
2480
2481 for (i = 0; i < ic->ic_rxstream * 8; i++)
2482 setbit(frm, i);
2483 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
2484 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32))
2485 setbit(frm, 32);
2486 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) {
2487 if (ic->ic_rxstream >= 2) {
2488 for (i = 33; i <= 38; i++)
2489 setbit(frm, i);
2490 }
2491 if (ic->ic_rxstream >= 3) {
2492 for (i = 39; i <= 52; i++)
2493 setbit(frm, i);
2494 }
2495 if (ic->ic_txstream >= 4) {
2496 for (i = 53; i <= 76; i++)
2497 setbit(frm, i);
2498 }
2499 }
2500
2501 if (ic->ic_rxstream != ic->ic_txstream) {
2502 txparams = 0x1; /* TX MCS set defined */
2503 txparams |= 0x2; /* TX RX MCS not equal */
2504 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */
2505 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL)
2506 txparams |= 0x16; /* TX unequal modulation sup */
2507 } else
2508 txparams = 0;
2509 frm[12] = txparams;
2510}
2511
2512/*
2513 * Add body of an HTCAP information element.
2514 */
2515static uint8_t *
2516ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni)
2517{
2518#define ADDSHORT(frm, v) do { \
2519 frm[0] = (v) & 0xff; \
2520 frm[1] = (v) >> 8; \
2521 frm += 2; \
2522} while (0)
2523 struct ieee80211com *ic = ni->ni_ic;
2524 struct ieee80211vap *vap = ni->ni_vap;
2525 uint16_t caps, extcaps;
2526 int rxmax, density;
2527
2528 /* HT capabilities */
2529 caps = vap->iv_htcaps & 0xffff;
2530 /*
2531 * Note channel width depends on whether we are operating as
2532 * a sta or not. When operating as a sta we are generating
2533 * a request based on our desired configuration. Otherwise
2534 * we are operational and the channel attributes identify
2535 * how we've been setup (which might be different if a fixed
2536 * channel is specified).
2537 */
2538 if (vap->iv_opmode == IEEE80211_M_STA) {
2539 /* override 20/40 use based on config */
2540 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)
2541 caps |= IEEE80211_HTCAP_CHWIDTH40;
2542 else
2543 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2544 /* use advertised setting (XXX locally constraint) */
2545 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU);
2546 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY);
2547
2548 /*
2549 * NB: Hardware might support HT40 on some but not all
2550 * channels. We can't determine this earlier because only
2551 * after association the channel is upgraded to HT based
2552 * on the negotiated capabilities.
2553 */
2554 if (ni->ni_chan != IEEE80211_CHAN_ANYC &&
2555 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL &&
2556 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL)
2557 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2558 } else {
2559 /* override 20/40 use based on current channel */
2560 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2561 caps |= IEEE80211_HTCAP_CHWIDTH40;
2562 else
2563 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2564 rxmax = vap->iv_ampdu_rxmax;
2565 density = vap->iv_ampdu_density;
2566 }
2567 /* adjust short GI based on channel and config */
2568 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
2569 caps &= ~IEEE80211_HTCAP_SHORTGI20;
2570 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
2571 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
2572 caps &= ~IEEE80211_HTCAP_SHORTGI40;
2573 ADDSHORT(frm, caps);
2574
2575 /* HT parameters */
2576 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
2577 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
2578 ;
2579 frm++;
2580
2581 /* pre-zero remainder of ie */
2582 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
2583 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
2584
2585 /* supported MCS set */
2586 /*
2587 * XXX: For sta mode the rate set should be restricted based
2588 * on the AP's capabilities, but ni_htrates isn't setup when
2589 * we're called to form an AssocReq frame so for now we're
2590 * restricted to the device capabilities.
2591 */
2592 ieee80211_set_mcsset(ni->ni_ic, frm);
2593
2594 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
2595 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
2596
2597 /* HT extended capabilities */
2598 extcaps = vap->iv_htextcaps & 0xffff;
2599
2600 ADDSHORT(frm, extcaps);
2601
2602 frm += sizeof(struct ieee80211_ie_htcap) -
2603 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
2604
2605 return frm;
2606#undef ADDSHORT
2607}
2608
2609/*
2610 * Add 802.11n HT capabilities information element
2611 */
2612uint8_t *
2613ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni)
2614{
2615 frm[0] = IEEE80211_ELEMID_HTCAP;
2616 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
2617 return ieee80211_add_htcap_body(frm + 2, ni);
2618}
2619
2620/*
2621 * Add Broadcom OUI wrapped standard HTCAP ie; this is
2622 * used for compatibility w/ pre-draft implementations.
2623 */
2624uint8_t *
2625ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni)
2626{
2627 frm[0] = IEEE80211_ELEMID_VENDOR;
2628 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2;
2629 frm[2] = (BCM_OUI >> 0) & 0xff;
2630 frm[3] = (BCM_OUI >> 8) & 0xff;
2631 frm[4] = (BCM_OUI >> 16) & 0xff;
2632 frm[5] = BCM_OUI_HTCAP;
2633 return ieee80211_add_htcap_body(frm + 6, ni);
2634}
2635
2636/*
2637 * Construct the MCS bit mask of basic rates
2638 * for inclusion in an HT information element.
2639 */
2640static void
2641ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs)
2642{
2643 int i;
2644
2645 for (i = 0; i < rs->rs_nrates; i++) {
2646 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL;
2647 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) &&
2648 r < IEEE80211_HTRATE_MAXSIZE) {
2649 /* NB: this assumes a particular implementation */
2650 setbit(frm, r);
2651 }
2652 }
2653}
2654
2655/*
2656 * Update the HTINFO ie for a beacon frame.
2657 */
2658void
2659ieee80211_ht_update_beacon(struct ieee80211vap *vap,
2660 struct ieee80211_beacon_offsets *bo)
2661{
2662#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT)
2663 const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan;
2664 struct ieee80211com *ic = vap->iv_ic;
2665 struct ieee80211_ie_htinfo *ht =
2666 (struct ieee80211_ie_htinfo *) bo->bo_htinfo;
2667
2668 /* XXX only update on channel change */
2669 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan);
2670 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2671 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM;
2672 else
2673 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH;
2674 if (IEEE80211_IS_CHAN_HT40U(bsschan))
2675 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2676 else if (IEEE80211_IS_CHAN_HT40D(bsschan))
2677 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2678 else
2679 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE;
2680 if (IEEE80211_IS_CHAN_HT40(bsschan))
2681 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040;
2682
2683 /* protection mode */
2684 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode;
2685
2686 /* XXX propagate to vendor ie's */
2687#undef PROTMODE
2688}
2689
2690/*
2691 * Add body of an HTINFO information element.
2692 *
2693 * NB: We don't use struct ieee80211_ie_htinfo because we can
2694 * be called to fillin both a standard ie and a compat ie that
2695 * has a vendor OUI at the front.
2696 */
2697static uint8_t *
2698ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni)
2699{
2700 struct ieee80211vap *vap = ni->ni_vap;
2701 struct ieee80211com *ic = ni->ni_ic;
2702
2703 /* pre-zero remainder of ie */
2704 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2);
2705
2706 /* primary/control channel center */
2707 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
2708
2709 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2710 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM;
2711 else
2712 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH;
2713 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
2714 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2715 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
2716 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2717 else
2718 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE;
2719 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2720 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040;
2721
2722 frm[1] = ic->ic_curhtprotmode;
2723
2724 frm += 5;
2725
2726 /* basic MCS set */
2727 ieee80211_set_basic_htrates(frm, &ni->ni_htrates);
2728 frm += sizeof(struct ieee80211_ie_htinfo) -
2729 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset);
2730 return frm;
2731}
2732
2733/*
2734 * Add 802.11n HT information information element.
2735 */
2736uint8_t *
2737ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni)
2738{
2739 frm[0] = IEEE80211_ELEMID_HTINFO;
2740 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2;
2741 return ieee80211_add_htinfo_body(frm + 2, ni);
2742}
2743
2744/*
2745 * Add Broadcom OUI wrapped standard HTINFO ie; this is
2746 * used for compatibility w/ pre-draft implementations.
2747 */
2748uint8_t *
2749ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni)
2750{
2751 frm[0] = IEEE80211_ELEMID_VENDOR;
2752 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2;
2753 frm[2] = (BCM_OUI >> 0) & 0xff;
2754 frm[3] = (BCM_OUI >> 8) & 0xff;
2755 frm[4] = (BCM_OUI >> 16) & 0xff;
2756 frm[5] = BCM_OUI_HTINFO;
2757 return ieee80211_add_htinfo_body(frm + 6, ni);
2758}
| 1743/*
1744 * Default method for requesting A-MPDU tx aggregation.
1745 * We setup the specified state block and start a timer
1746 * to wait for an ADDBA response frame.
1747 */
1748static int
1749ieee80211_addba_request(struct ieee80211_node *ni,
1750 struct ieee80211_tx_ampdu *tap,
1751 int dialogtoken, int baparamset, int batimeout)
1752{
1753 int bufsiz;
1754
1755 /* XXX locking */
1756 tap->txa_token = dialogtoken;
1757 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE;
1758 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1759 tap->txa_wnd = (bufsiz == 0) ?
1760 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1761 addba_start_timeout(tap);
1762 return 1;
1763}
1764
1765/*
1766 * Default method for processing an A-MPDU tx aggregation
1767 * response. We shutdown any pending timer and update the
1768 * state block according to the reply.
1769 */
1770static int
1771ieee80211_addba_response(struct ieee80211_node *ni,
1772 struct ieee80211_tx_ampdu *tap,
1773 int status, int baparamset, int batimeout)
1774{
1775 int bufsiz, tid;
1776
1777 /* XXX locking */
1778 addba_stop_timeout(tap);
1779 if (status == IEEE80211_STATUS_SUCCESS) {
1780 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1781 /* XXX override our request? */
1782 tap->txa_wnd = (bufsiz == 0) ?
1783 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1784 /* XXX AC/TID */
1785 tid = MS(baparamset, IEEE80211_BAPS_TID);
1786 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
1787 tap->txa_attempts = 0;
1788 } else {
1789 /* mark tid so we don't try again */
1790 tap->txa_flags |= IEEE80211_AGGR_NAK;
1791 }
1792 return 1;
1793}
1794
1795/*
1796 * Default method for stopping A-MPDU tx aggregation.
1797 * Any timer is cleared and we drain any pending frames.
1798 */
1799static void
1800ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
1801{
1802 /* XXX locking */
1803 addba_stop_timeout(tap);
1804 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) {
1805 /* XXX clear aggregation queue */
1806 tap->txa_flags &= ~IEEE80211_AGGR_RUNNING;
1807 }
1808 tap->txa_attempts = 0;
1809}
1810
1811/*
1812 * Process a received action frame using the default aggregation
1813 * policy. We intercept ADDBA-related frames and use them to
1814 * update our aggregation state. All other frames are passed up
1815 * for processing by ieee80211_recv_action.
1816 */
1817static int
1818ht_recv_action_ba_addba_request(struct ieee80211_node *ni,
1819 const struct ieee80211_frame *wh,
1820 const uint8_t *frm, const uint8_t *efrm)
1821{
1822 struct ieee80211com *ic = ni->ni_ic;
1823 struct ieee80211vap *vap = ni->ni_vap;
1824 struct ieee80211_rx_ampdu *rap;
1825 uint8_t dialogtoken;
1826 uint16_t baparamset, batimeout, baseqctl;
1827 uint16_t args[5];
1828 int tid;
1829
1830 dialogtoken = frm[2];
1831 baparamset = LE_READ_2(frm+3);
1832 batimeout = LE_READ_2(frm+5);
1833 baseqctl = LE_READ_2(frm+7);
1834
1835 tid = MS(baparamset, IEEE80211_BAPS_TID);
1836
1837 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1838 "recv ADDBA request: dialogtoken %u baparamset 0x%x "
1839 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d",
1840 dialogtoken, baparamset,
1841 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ),
1842 batimeout,
1843 MS(baseqctl, IEEE80211_BASEQ_START),
1844 MS(baseqctl, IEEE80211_BASEQ_FRAG));
1845
1846 rap = &ni->ni_rx_ampdu[tid];
1847
1848 /* Send ADDBA response */
1849 args[0] = dialogtoken;
1850 /*
1851 * NB: We ack only if the sta associated with HT and
1852 * the ap is configured to do AMPDU rx (the latter
1853 * violates the 11n spec and is mostly for testing).
1854 */
1855 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) &&
1856 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) {
1857 /* XXX handle ampdu_rx_start failure */
1858 ic->ic_ampdu_rx_start(ni, rap,
1859 baparamset, batimeout, baseqctl);
1860
1861 args[1] = IEEE80211_STATUS_SUCCESS;
1862 } else {
1863 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1864 ni, "reject ADDBA request: %s",
1865 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ?
1866 "administratively disabled" :
1867 "not negotiated for station");
1868 vap->iv_stats.is_addba_reject++;
1869 args[1] = IEEE80211_STATUS_UNSPECIFIED;
1870 }
1871 /* XXX honor rap flags? */
1872 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
1873 | SM(tid, IEEE80211_BAPS_TID)
1874 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ)
1875 ;
1876 args[3] = 0;
1877 args[4] = 0;
1878 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
1879 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args);
1880 return 0;
1881}
1882
1883static int
1884ht_recv_action_ba_addba_response(struct ieee80211_node *ni,
1885 const struct ieee80211_frame *wh,
1886 const uint8_t *frm, const uint8_t *efrm)
1887{
1888 struct ieee80211com *ic = ni->ni_ic;
1889 struct ieee80211vap *vap = ni->ni_vap;
1890 struct ieee80211_tx_ampdu *tap;
1891 uint8_t dialogtoken, policy;
1892 uint16_t baparamset, batimeout, code;
1893 int tid, ac, bufsiz;
1894
1895 dialogtoken = frm[2];
1896 code = LE_READ_2(frm+3);
1897 baparamset = LE_READ_2(frm+5);
1898 tid = MS(baparamset, IEEE80211_BAPS_TID);
1899 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1900 policy = MS(baparamset, IEEE80211_BAPS_POLICY);
1901 batimeout = LE_READ_2(frm+7);
1902
1903 ac = TID_TO_WME_AC(tid);
1904 tap = &ni->ni_tx_ampdu[ac];
1905 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1906 IEEE80211_DISCARD_MAC(vap,
1907 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1908 ni->ni_macaddr, "ADDBA response",
1909 "no pending ADDBA, tid %d dialogtoken %u "
1910 "code %d", tid, dialogtoken, code);
1911 vap->iv_stats.is_addba_norequest++;
1912 return 0;
1913 }
1914 if (dialogtoken != tap->txa_token) {
1915 IEEE80211_DISCARD_MAC(vap,
1916 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1917 ni->ni_macaddr, "ADDBA response",
1918 "dialogtoken mismatch: waiting for %d, "
1919 "received %d, tid %d code %d",
1920 tap->txa_token, dialogtoken, tid, code);
1921 vap->iv_stats.is_addba_badtoken++;
1922 return 0;
1923 }
1924 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */
1925 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) {
1926 IEEE80211_DISCARD_MAC(vap,
1927 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1928 ni->ni_macaddr, "ADDBA response",
1929 "policy mismatch: expecting %s, "
1930 "received %s, tid %d code %d",
1931 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE,
1932 policy, tid, code);
1933 vap->iv_stats.is_addba_badpolicy++;
1934 return 0;
1935 }
1936#if 0
1937 /* XXX we take MIN in ieee80211_addba_response */
1938 if (bufsiz > IEEE80211_AGGR_BAWMAX) {
1939 IEEE80211_DISCARD_MAC(vap,
1940 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1941 ni->ni_macaddr, "ADDBA response",
1942 "BA window too large: max %d, "
1943 "received %d, tid %d code %d",
1944 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code);
1945 vap->iv_stats.is_addba_badbawinsize++;
1946 return 0;
1947 }
1948#endif
1949 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1950 "recv ADDBA response: dialogtoken %u code %d "
1951 "baparamset 0x%x (tid %d bufsiz %d) batimeout %d",
1952 dialogtoken, code, baparamset, tid, bufsiz,
1953 batimeout);
1954 ic->ic_addba_response(ni, tap, code, baparamset, batimeout);
1955 return 0;
1956}
1957
1958static int
1959ht_recv_action_ba_delba(struct ieee80211_node *ni,
1960 const struct ieee80211_frame *wh,
1961 const uint8_t *frm, const uint8_t *efrm)
1962{
1963 struct ieee80211com *ic = ni->ni_ic;
1964 struct ieee80211_rx_ampdu *rap;
1965 struct ieee80211_tx_ampdu *tap;
1966 uint16_t baparamset, code;
1967 int tid, ac;
1968
1969 baparamset = LE_READ_2(frm+2);
1970 code = LE_READ_2(frm+4);
1971
1972 tid = MS(baparamset, IEEE80211_DELBAPS_TID);
1973
1974 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1975 "recv DELBA: baparamset 0x%x (tid %d initiator %d) "
1976 "code %d", baparamset, tid,
1977 MS(baparamset, IEEE80211_DELBAPS_INIT), code);
1978
1979 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) {
1980 ac = TID_TO_WME_AC(tid);
1981 tap = &ni->ni_tx_ampdu[ac];
1982 ic->ic_addba_stop(ni, tap);
1983 } else {
1984 rap = &ni->ni_rx_ampdu[tid];
1985 ic->ic_ampdu_rx_stop(ni, rap);
1986 }
1987 return 0;
1988}
1989
1990static int
1991ht_recv_action_ht_txchwidth(struct ieee80211_node *ni,
1992 const struct ieee80211_frame *wh,
1993 const uint8_t *frm, const uint8_t *efrm)
1994{
1995 int chw;
1996
1997 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20;
1998
1999 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2000 "%s: HT txchwidth, width %d%s",
2001 __func__, chw, ni->ni_chw != chw ? "*" : "");
2002 if (chw != ni->ni_chw) {
2003 ni->ni_chw = chw;
2004 /* XXX notify on change */
2005 }
2006 return 0;
2007}
2008
2009static int
2010ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni,
2011 const struct ieee80211_frame *wh,
2012 const uint8_t *frm, const uint8_t *efrm)
2013{
2014 const struct ieee80211_action_ht_mimopowersave *mps =
2015 (const struct ieee80211_action_ht_mimopowersave *) frm;
2016
2017 /* XXX check iv_htcaps */
2018 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA)
2019 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
2020 else
2021 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
2022 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE)
2023 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
2024 else
2025 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
2026 /* XXX notify on change */
2027 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2028 "%s: HT MIMO PS (%s%s)", __func__,
2029 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off",
2030 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : ""
2031 );
2032 return 0;
2033}
2034
2035/*
2036 * Transmit processing.
2037 */
2038
2039/*
2040 * Check if A-MPDU should be requested/enabled for a stream.
2041 * We require a traffic rate above a per-AC threshold and we
2042 * also handle backoff from previous failed attempts.
2043 *
2044 * Drivers may override this method to bring in information
2045 * such as link state conditions in making the decision.
2046 */
2047static int
2048ieee80211_ampdu_enable(struct ieee80211_node *ni,
2049 struct ieee80211_tx_ampdu *tap)
2050{
2051 struct ieee80211vap *vap = ni->ni_vap;
2052
2053 if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac])
2054 return 0;
2055 /* XXX check rssi? */
2056 if (tap->txa_attempts >= ieee80211_addba_maxtries &&
2057 ticks < tap->txa_nextrequest) {
2058 /*
2059 * Don't retry too often; txa_nextrequest is set
2060 * to the minimum interval we'll retry after
2061 * ieee80211_addba_maxtries failed attempts are made.
2062 */
2063 return 0;
2064 }
2065 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
2066 "enable AMPDU on %s, avgpps %d pkts %d",
2067 ieee80211_wme_acnames[tap->txa_ac], tap->txa_avgpps, tap->txa_pkts);
2068 return 1;
2069}
2070
2071/*
2072 * Request A-MPDU tx aggregation. Setup local state and
2073 * issue an ADDBA request. BA use will only happen after
2074 * the other end replies with ADDBA response.
2075 */
2076int
2077ieee80211_ampdu_request(struct ieee80211_node *ni,
2078 struct ieee80211_tx_ampdu *tap)
2079{
2080 struct ieee80211com *ic = ni->ni_ic;
2081 uint16_t args[5];
2082 int tid, dialogtoken;
2083 static int tokens = 0; /* XXX */
2084
2085 /* XXX locking */
2086 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2087 /* do deferred setup of state */
2088 ampdu_tx_setup(tap);
2089 }
2090 /* XXX hack for not doing proper locking */
2091 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2092
2093 dialogtoken = (tokens+1) % 63; /* XXX */
2094 tid = WME_AC_TO_TID(tap->txa_ac);
2095 tap->txa_start = ni->ni_txseqs[tid];
2096
2097 args[0] = dialogtoken;
2098 args[1] = 0; /* NB: status code not used */
2099 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2100 | SM(tid, IEEE80211_BAPS_TID)
2101 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ)
2102 ;
2103 args[3] = 0; /* batimeout */
2104 /* NB: do first so there's no race against reply */
2105 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) {
2106 /* unable to setup state, don't make request */
2107 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2108 ni, "%s: could not setup BA stream for AC %d",
2109 __func__, tap->txa_ac);
2110 /* defer next try so we don't slam the driver with requests */
2111 tap->txa_attempts = ieee80211_addba_maxtries;
2112 /* NB: check in case driver wants to override */
2113 if (tap->txa_nextrequest <= ticks)
2114 tap->txa_nextrequest = ticks + ieee80211_addba_backoff;
2115 return 0;
2116 }
2117 tokens = dialogtoken; /* allocate token */
2118 /* NB: after calling ic_addba_request so driver can set txa_start */
2119 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START)
2120 | SM(0, IEEE80211_BASEQ_FRAG)
2121 ;
2122 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2123 IEEE80211_ACTION_BA_ADDBA_REQUEST, args);
2124}
2125
2126/*
2127 * Terminate an AMPDU tx stream. State is reclaimed
2128 * and the peer notified with a DelBA Action frame.
2129 */
2130void
2131ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
2132 int reason)
2133{
2134 struct ieee80211com *ic = ni->ni_ic;
2135 struct ieee80211vap *vap = ni->ni_vap;
2136 uint16_t args[4];
2137
2138 /* XXX locking */
2139 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2140 if (IEEE80211_AMPDU_RUNNING(tap)) {
2141 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2142 ni, "%s: stop BA stream for AC %d (reason %d)",
2143 __func__, tap->txa_ac, reason);
2144 vap->iv_stats.is_ampdu_stop++;
2145
2146 ic->ic_addba_stop(ni, tap);
2147 args[0] = WME_AC_TO_TID(tap->txa_ac);
2148 args[1] = IEEE80211_DELBAPS_INIT;
2149 args[2] = reason; /* XXX reason code */
2150 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2151 IEEE80211_ACTION_BA_DELBA, args);
2152 } else {
2153 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2154 ni, "%s: BA stream for AC %d not running (reason %d)",
2155 __func__, tap->txa_ac, reason);
2156 vap->iv_stats.is_ampdu_stop_failed++;
2157 }
2158}
2159
2160static void
2161bar_timeout(void *arg)
2162{
2163 struct ieee80211_tx_ampdu *tap = arg;
2164 struct ieee80211_node *ni = tap->txa_ni;
2165
2166 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0,
2167 ("bar/addba collision, flags 0x%x", tap->txa_flags));
2168
2169 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2170 ni, "%s: tid %u flags 0x%x attempts %d", __func__,
2171 tap->txa_ac, tap->txa_flags, tap->txa_attempts);
2172
2173 /* guard against race with bar_tx_complete */
2174 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2175 return;
2176 /* XXX ? */
2177 if (tap->txa_attempts >= ieee80211_bar_maxtries)
2178 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT);
2179 else
2180 ieee80211_send_bar(ni, tap, tap->txa_seqpending);
2181}
2182
2183static void
2184bar_start_timer(struct ieee80211_tx_ampdu *tap)
2185{
2186 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap);
2187}
2188
2189static void
2190bar_stop_timer(struct ieee80211_tx_ampdu *tap)
2191{
2192 callout_stop(&tap->txa_timer);
2193}
2194
2195static void
2196bar_tx_complete(struct ieee80211_node *ni, void *arg, int status)
2197{
2198 struct ieee80211_tx_ampdu *tap = arg;
2199
2200 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2201 ni, "%s: tid %u flags 0x%x pending %d status %d",
2202 __func__, tap->txa_ac, tap->txa_flags,
2203 callout_pending(&tap->txa_timer), status);
2204
2205 /* XXX locking */
2206 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) &&
2207 callout_pending(&tap->txa_timer)) {
2208 struct ieee80211com *ic = ni->ni_ic;
2209
2210 if (status) /* ACK'd */
2211 bar_stop_timer(tap);
2212 ic->ic_bar_response(ni, tap, status);
2213 /* NB: just let timer expire so we pace requests */
2214 }
2215}
2216
2217static void
2218ieee80211_bar_response(struct ieee80211_node *ni,
2219 struct ieee80211_tx_ampdu *tap, int status)
2220{
2221
2222 if (status != 0) { /* got ACK */
2223 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2224 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u",
2225 tap->txa_start,
2226 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1),
2227 tap->txa_qframes, tap->txa_seqpending,
2228 WME_AC_TO_TID(tap->txa_ac));
2229
2230 /* NB: timer already stopped in bar_tx_complete */
2231 tap->txa_start = tap->txa_seqpending;
2232 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2233 }
2234}
2235
2236/*
2237 * Transmit a BAR frame to the specified node. The
2238 * BAR contents are drawn from the supplied aggregation
2239 * state associated with the node.
2240 *
2241 * NB: we only handle immediate ACK w/ compressed bitmap.
2242 */
2243int
2244ieee80211_send_bar(struct ieee80211_node *ni,
2245 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq)
2246{
2247#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2248 struct ieee80211vap *vap = ni->ni_vap;
2249 struct ieee80211com *ic = ni->ni_ic;
2250 struct ieee80211_frame_bar *bar;
2251 struct mbuf *m;
2252 uint16_t barctl, barseqctl;
2253 uint8_t *frm;
2254 int tid, ret;
2255
2256 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) {
2257 /* no ADDBA response, should not happen */
2258 /* XXX stat+msg */
2259 return EINVAL;
2260 }
2261 /* XXX locking */
2262 bar_stop_timer(tap);
2263
2264 ieee80211_ref_node(ni);
2265
2266 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar));
2267 if (m == NULL)
2268 senderr(ENOMEM, is_tx_nobuf);
2269
2270 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) {
2271 m_freem(m);
2272 senderr(ENOMEM, is_tx_nobuf); /* XXX */
2273 /* NOTREACHED */
2274 }
2275
2276 bar = mtod(m, struct ieee80211_frame_bar *);
2277 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2278 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR;
2279 bar->i_fc[1] = 0;
2280 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr);
2281 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr);
2282
2283 tid = WME_AC_TO_TID(tap->txa_ac);
2284 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ?
2285 0 : IEEE80211_BAR_NOACK)
2286 | IEEE80211_BAR_COMP
2287 | SM(tid, IEEE80211_BAR_TID)
2288 ;
2289 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START);
2290 /* NB: known to have proper alignment */
2291 bar->i_ctl = htole16(barctl);
2292 bar->i_seq = htole16(barseqctl);
2293 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar);
2294
2295 M_WME_SETAC(m, WME_AC_VO);
2296
2297 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */
2298
2299 /* XXX locking */
2300 /* init/bump attempts counter */
2301 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2302 tap->txa_attempts = 1;
2303 else
2304 tap->txa_attempts++;
2305 tap->txa_seqpending = seq;
2306 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2307
2308 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2309 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)",
2310 tid, barctl, seq, tap->txa_attempts);
2311
2312 ret = ic->ic_raw_xmit(ni, m, NULL);
2313 if (ret != 0) {
2314 /* xmit failed, clear state flag */
2315 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2316 goto bad;
2317 }
2318 /* XXX hack against tx complete happening before timer is started */
2319 if (tap->txa_flags & IEEE80211_AGGR_BARPEND)
2320 bar_start_timer(tap);
2321 return 0;
2322bad:
2323 ieee80211_free_node(ni);
2324 return ret;
2325#undef senderr
2326}
2327
2328static int
2329ht_action_output(struct ieee80211_node *ni, struct mbuf *m)
2330{
2331 struct ieee80211_bpf_params params;
2332
2333 memset(¶ms, 0, sizeof(params));
2334 params.ibp_pri = WME_AC_VO;
2335 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2336 /* NB: we know all frames are unicast */
2337 params.ibp_try0 = ni->ni_txparms->maxretry;
2338 params.ibp_power = ni->ni_txpower;
2339 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
2340 ¶ms);
2341}
2342
2343#define ADDSHORT(frm, v) do { \
2344 frm[0] = (v) & 0xff; \
2345 frm[1] = (v) >> 8; \
2346 frm += 2; \
2347} while (0)
2348
2349/*
2350 * Send an action management frame. The arguments are stuff
2351 * into a frame without inspection; the caller is assumed to
2352 * prepare them carefully (e.g. based on the aggregation state).
2353 */
2354static int
2355ht_send_action_ba_addba(struct ieee80211_node *ni,
2356 int category, int action, void *arg0)
2357{
2358 struct ieee80211vap *vap = ni->ni_vap;
2359 struct ieee80211com *ic = ni->ni_ic;
2360 uint16_t *args = arg0;
2361 struct mbuf *m;
2362 uint8_t *frm;
2363
2364 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2365 "send ADDBA %s: dialogtoken %d status %d "
2366 "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x",
2367 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ?
2368 "request" : "response",
2369 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID),
2370 args[3], args[4]);
2371
2372 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2373 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2374 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2375 ieee80211_ref_node(ni);
2376
2377 m = ieee80211_getmgtframe(&frm,
2378 ic->ic_headroom + sizeof(struct ieee80211_frame),
2379 sizeof(uint16_t) /* action+category */
2380 /* XXX may action payload */
2381 + sizeof(struct ieee80211_action_ba_addbaresponse)
2382 );
2383 if (m != NULL) {
2384 *frm++ = category;
2385 *frm++ = action;
2386 *frm++ = args[0]; /* dialog token */
2387 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE)
2388 ADDSHORT(frm, args[1]); /* status code */
2389 ADDSHORT(frm, args[2]); /* baparamset */
2390 ADDSHORT(frm, args[3]); /* batimeout */
2391 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST)
2392 ADDSHORT(frm, args[4]); /* baseqctl */
2393 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2394 return ht_action_output(ni, m);
2395 } else {
2396 vap->iv_stats.is_tx_nobuf++;
2397 ieee80211_free_node(ni);
2398 return ENOMEM;
2399 }
2400}
2401
2402static int
2403ht_send_action_ba_delba(struct ieee80211_node *ni,
2404 int category, int action, void *arg0)
2405{
2406 struct ieee80211vap *vap = ni->ni_vap;
2407 struct ieee80211com *ic = ni->ni_ic;
2408 uint16_t *args = arg0;
2409 struct mbuf *m;
2410 uint16_t baparamset;
2411 uint8_t *frm;
2412
2413 baparamset = SM(args[0], IEEE80211_DELBAPS_TID)
2414 | args[1]
2415 ;
2416 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2417 "send DELBA action: tid %d, initiator %d reason %d",
2418 args[0], args[1], args[2]);
2419
2420 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2421 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2422 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2423 ieee80211_ref_node(ni);
2424
2425 m = ieee80211_getmgtframe(&frm,
2426 ic->ic_headroom + sizeof(struct ieee80211_frame),
2427 sizeof(uint16_t) /* action+category */
2428 /* XXX may action payload */
2429 + sizeof(struct ieee80211_action_ba_addbaresponse)
2430 );
2431 if (m != NULL) {
2432 *frm++ = category;
2433 *frm++ = action;
2434 ADDSHORT(frm, baparamset);
2435 ADDSHORT(frm, args[2]); /* reason code */
2436 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2437 return ht_action_output(ni, m);
2438 } else {
2439 vap->iv_stats.is_tx_nobuf++;
2440 ieee80211_free_node(ni);
2441 return ENOMEM;
2442 }
2443}
2444
2445static int
2446ht_send_action_ht_txchwidth(struct ieee80211_node *ni,
2447 int category, int action, void *arg0)
2448{
2449 struct ieee80211vap *vap = ni->ni_vap;
2450 struct ieee80211com *ic = ni->ni_ic;
2451 struct mbuf *m;
2452 uint8_t *frm;
2453
2454 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2455 "send HT txchwidth: width %d",
2456 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20);
2457
2458 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2459 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2460 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2461 ieee80211_ref_node(ni);
2462
2463 m = ieee80211_getmgtframe(&frm,
2464 ic->ic_headroom + sizeof(struct ieee80211_frame),
2465 sizeof(uint16_t) /* action+category */
2466 /* XXX may action payload */
2467 + sizeof(struct ieee80211_action_ba_addbaresponse)
2468 );
2469 if (m != NULL) {
2470 *frm++ = category;
2471 *frm++ = action;
2472 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ?
2473 IEEE80211_A_HT_TXCHWIDTH_2040 :
2474 IEEE80211_A_HT_TXCHWIDTH_20;
2475 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2476 return ht_action_output(ni, m);
2477 } else {
2478 vap->iv_stats.is_tx_nobuf++;
2479 ieee80211_free_node(ni);
2480 return ENOMEM;
2481 }
2482}
2483#undef ADDSHORT
2484
2485/*
2486 * Construct the MCS bit mask for inclusion in an HT capabilities
2487 * information element.
2488 */
2489static void
2490ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm)
2491{
2492 int i;
2493 uint8_t txparams;
2494
2495 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4),
2496 ("ic_rxstream %d out of range", ic->ic_rxstream));
2497 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4),
2498 ("ic_txstream %d out of range", ic->ic_txstream));
2499
2500 for (i = 0; i < ic->ic_rxstream * 8; i++)
2501 setbit(frm, i);
2502 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
2503 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32))
2504 setbit(frm, 32);
2505 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) {
2506 if (ic->ic_rxstream >= 2) {
2507 for (i = 33; i <= 38; i++)
2508 setbit(frm, i);
2509 }
2510 if (ic->ic_rxstream >= 3) {
2511 for (i = 39; i <= 52; i++)
2512 setbit(frm, i);
2513 }
2514 if (ic->ic_txstream >= 4) {
2515 for (i = 53; i <= 76; i++)
2516 setbit(frm, i);
2517 }
2518 }
2519
2520 if (ic->ic_rxstream != ic->ic_txstream) {
2521 txparams = 0x1; /* TX MCS set defined */
2522 txparams |= 0x2; /* TX RX MCS not equal */
2523 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */
2524 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL)
2525 txparams |= 0x16; /* TX unequal modulation sup */
2526 } else
2527 txparams = 0;
2528 frm[12] = txparams;
2529}
2530
2531/*
2532 * Add body of an HTCAP information element.
2533 */
2534static uint8_t *
2535ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni)
2536{
2537#define ADDSHORT(frm, v) do { \
2538 frm[0] = (v) & 0xff; \
2539 frm[1] = (v) >> 8; \
2540 frm += 2; \
2541} while (0)
2542 struct ieee80211com *ic = ni->ni_ic;
2543 struct ieee80211vap *vap = ni->ni_vap;
2544 uint16_t caps, extcaps;
2545 int rxmax, density;
2546
2547 /* HT capabilities */
2548 caps = vap->iv_htcaps & 0xffff;
2549 /*
2550 * Note channel width depends on whether we are operating as
2551 * a sta or not. When operating as a sta we are generating
2552 * a request based on our desired configuration. Otherwise
2553 * we are operational and the channel attributes identify
2554 * how we've been setup (which might be different if a fixed
2555 * channel is specified).
2556 */
2557 if (vap->iv_opmode == IEEE80211_M_STA) {
2558 /* override 20/40 use based on config */
2559 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)
2560 caps |= IEEE80211_HTCAP_CHWIDTH40;
2561 else
2562 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2563 /* use advertised setting (XXX locally constraint) */
2564 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU);
2565 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY);
2566
2567 /*
2568 * NB: Hardware might support HT40 on some but not all
2569 * channels. We can't determine this earlier because only
2570 * after association the channel is upgraded to HT based
2571 * on the negotiated capabilities.
2572 */
2573 if (ni->ni_chan != IEEE80211_CHAN_ANYC &&
2574 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL &&
2575 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL)
2576 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2577 } else {
2578 /* override 20/40 use based on current channel */
2579 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2580 caps |= IEEE80211_HTCAP_CHWIDTH40;
2581 else
2582 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2583 rxmax = vap->iv_ampdu_rxmax;
2584 density = vap->iv_ampdu_density;
2585 }
2586 /* adjust short GI based on channel and config */
2587 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
2588 caps &= ~IEEE80211_HTCAP_SHORTGI20;
2589 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
2590 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
2591 caps &= ~IEEE80211_HTCAP_SHORTGI40;
2592 ADDSHORT(frm, caps);
2593
2594 /* HT parameters */
2595 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
2596 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
2597 ;
2598 frm++;
2599
2600 /* pre-zero remainder of ie */
2601 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
2602 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
2603
2604 /* supported MCS set */
2605 /*
2606 * XXX: For sta mode the rate set should be restricted based
2607 * on the AP's capabilities, but ni_htrates isn't setup when
2608 * we're called to form an AssocReq frame so for now we're
2609 * restricted to the device capabilities.
2610 */
2611 ieee80211_set_mcsset(ni->ni_ic, frm);
2612
2613 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
2614 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
2615
2616 /* HT extended capabilities */
2617 extcaps = vap->iv_htextcaps & 0xffff;
2618
2619 ADDSHORT(frm, extcaps);
2620
2621 frm += sizeof(struct ieee80211_ie_htcap) -
2622 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
2623
2624 return frm;
2625#undef ADDSHORT
2626}
2627
2628/*
2629 * Add 802.11n HT capabilities information element
2630 */
2631uint8_t *
2632ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni)
2633{
2634 frm[0] = IEEE80211_ELEMID_HTCAP;
2635 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
2636 return ieee80211_add_htcap_body(frm + 2, ni);
2637}
2638
2639/*
2640 * Add Broadcom OUI wrapped standard HTCAP ie; this is
2641 * used for compatibility w/ pre-draft implementations.
2642 */
2643uint8_t *
2644ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni)
2645{
2646 frm[0] = IEEE80211_ELEMID_VENDOR;
2647 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2;
2648 frm[2] = (BCM_OUI >> 0) & 0xff;
2649 frm[3] = (BCM_OUI >> 8) & 0xff;
2650 frm[4] = (BCM_OUI >> 16) & 0xff;
2651 frm[5] = BCM_OUI_HTCAP;
2652 return ieee80211_add_htcap_body(frm + 6, ni);
2653}
2654
2655/*
2656 * Construct the MCS bit mask of basic rates
2657 * for inclusion in an HT information element.
2658 */
2659static void
2660ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs)
2661{
2662 int i;
2663
2664 for (i = 0; i < rs->rs_nrates; i++) {
2665 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL;
2666 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) &&
2667 r < IEEE80211_HTRATE_MAXSIZE) {
2668 /* NB: this assumes a particular implementation */
2669 setbit(frm, r);
2670 }
2671 }
2672}
2673
2674/*
2675 * Update the HTINFO ie for a beacon frame.
2676 */
2677void
2678ieee80211_ht_update_beacon(struct ieee80211vap *vap,
2679 struct ieee80211_beacon_offsets *bo)
2680{
2681#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT)
2682 const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan;
2683 struct ieee80211com *ic = vap->iv_ic;
2684 struct ieee80211_ie_htinfo *ht =
2685 (struct ieee80211_ie_htinfo *) bo->bo_htinfo;
2686
2687 /* XXX only update on channel change */
2688 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan);
2689 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2690 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM;
2691 else
2692 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH;
2693 if (IEEE80211_IS_CHAN_HT40U(bsschan))
2694 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2695 else if (IEEE80211_IS_CHAN_HT40D(bsschan))
2696 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2697 else
2698 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE;
2699 if (IEEE80211_IS_CHAN_HT40(bsschan))
2700 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040;
2701
2702 /* protection mode */
2703 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode;
2704
2705 /* XXX propagate to vendor ie's */
2706#undef PROTMODE
2707}
2708
2709/*
2710 * Add body of an HTINFO information element.
2711 *
2712 * NB: We don't use struct ieee80211_ie_htinfo because we can
2713 * be called to fillin both a standard ie and a compat ie that
2714 * has a vendor OUI at the front.
2715 */
2716static uint8_t *
2717ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni)
2718{
2719 struct ieee80211vap *vap = ni->ni_vap;
2720 struct ieee80211com *ic = ni->ni_ic;
2721
2722 /* pre-zero remainder of ie */
2723 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2);
2724
2725 /* primary/control channel center */
2726 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
2727
2728 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2729 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM;
2730 else
2731 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH;
2732 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
2733 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2734 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
2735 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2736 else
2737 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE;
2738 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2739 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040;
2740
2741 frm[1] = ic->ic_curhtprotmode;
2742
2743 frm += 5;
2744
2745 /* basic MCS set */
2746 ieee80211_set_basic_htrates(frm, &ni->ni_htrates);
2747 frm += sizeof(struct ieee80211_ie_htinfo) -
2748 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset);
2749 return frm;
2750}
2751
2752/*
2753 * Add 802.11n HT information information element.
2754 */
2755uint8_t *
2756ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni)
2757{
2758 frm[0] = IEEE80211_ELEMID_HTINFO;
2759 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2;
2760 return ieee80211_add_htinfo_body(frm + 2, ni);
2761}
2762
2763/*
2764 * Add Broadcom OUI wrapped standard HTINFO ie; this is
2765 * used for compatibility w/ pre-draft implementations.
2766 */
2767uint8_t *
2768ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni)
2769{
2770 frm[0] = IEEE80211_ELEMID_VENDOR;
2771 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2;
2772 frm[2] = (BCM_OUI >> 0) & 0xff;
2773 frm[3] = (BCM_OUI >> 8) & 0xff;
2774 frm[4] = (BCM_OUI >> 16) & 0xff;
2775 frm[5] = BCM_OUI_HTINFO;
2776 return ieee80211_add_htinfo_body(frm + 6, ni);
2777}
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