aboutsummaryrefslogtreecommitdiffstats
path: root/src/drivers/driver_common.c
blob: f897c114797a1992c72d2aa5b72182a33f30ba19 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
/*
 * Common driver-related functions
 * Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi>
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "includes.h"
#include "utils/common.h"
#include "driver.h"

void wpa_scan_results_free(struct wpa_scan_results *res)
{
	size_t i;

	if (res == NULL)
		return;

	for (i = 0; i < res->num; i++)
		os_free(res->res[i]);
	os_free(res->res);
	os_free(res);
}


const char * event_to_string(enum wpa_event_type event)
{
#define E2S(n) case EVENT_ ## n: return #n
	switch (event) {
	E2S(ASSOC);
	E2S(DISASSOC);
	E2S(MICHAEL_MIC_FAILURE);
	E2S(SCAN_RESULTS);
	E2S(ASSOCINFO);
	E2S(INTERFACE_STATUS);
	E2S(PMKID_CANDIDATE);
	E2S(STKSTART);
	E2S(TDLS);
	E2S(FT_RESPONSE);
	E2S(IBSS_RSN_START);
	E2S(AUTH);
	E2S(DEAUTH);
	E2S(ASSOC_REJECT);
	E2S(AUTH_TIMED_OUT);
	E2S(ASSOC_TIMED_OUT);
	E2S(WPS_BUTTON_PUSHED);
	E2S(TX_STATUS);
	E2S(RX_FROM_UNKNOWN);
	E2S(RX_MGMT);
	E2S(REMAIN_ON_CHANNEL);
	E2S(CANCEL_REMAIN_ON_CHANNEL);
	E2S(RX_PROBE_REQ);
	E2S(NEW_STA);
	E2S(EAPOL_RX);
	E2S(SIGNAL_CHANGE);
	E2S(INTERFACE_ENABLED);
	E2S(INTERFACE_DISABLED);
	E2S(CHANNEL_LIST_CHANGED);
	E2S(INTERFACE_UNAVAILABLE);
	E2S(BEST_CHANNEL);
	E2S(UNPROT_DEAUTH);
	E2S(UNPROT_DISASSOC);
	E2S(STATION_LOW_ACK);
	E2S(IBSS_PEER_LOST);
	E2S(DRIVER_GTK_REKEY);
	E2S(SCHED_SCAN_STOPPED);
	E2S(DRIVER_CLIENT_POLL_OK);
	E2S(EAPOL_TX_STATUS);
	E2S(CH_SWITCH);
	E2S(WNM);
	E2S(CONNECT_FAILED_REASON);
	E2S(DFS_RADAR_DETECTED);
	E2S(DFS_CAC_FINISHED);
	E2S(DFS_CAC_ABORTED);
	E2S(DFS_NOP_FINISHED);
	E2S(SURVEY);
	E2S(SCAN_STARTED);
	E2S(AVOID_FREQUENCIES);
	E2S(NEW_PEER_CANDIDATE);
	E2S(ACS_CHANNEL_SELECTED);
	}

	return "UNKNOWN";
#undef E2S
}


const char * channel_width_to_string(enum chan_width width)
{
	switch (width) {
	case CHAN_WIDTH_20_NOHT:
		return "20 MHz (no HT)";
	case CHAN_WIDTH_20:
		return "20 MHz";
	case CHAN_WIDTH_40:
		return "40 MHz";
	case CHAN_WIDTH_80:
		return "80 MHz";
	case CHAN_WIDTH_80P80:
		return "80+80 MHz";
	case CHAN_WIDTH_160:
		return "160 MHz";
	default:
		return "unknown";
	}
}


int ht_supported(const struct hostapd_hw_modes *mode)
{
	if (!(mode->flags & HOSTAPD_MODE_FLAG_HT_INFO_KNOWN)) {
		/*
		 * The driver did not indicate whether it supports HT. Assume
		 * it does to avoid connection issues.
		 */
		return 1;
	}

	/*
	 * IEEE Std 802.11n-2009 20.1.1:
	 * An HT non-AP STA shall support all EQM rates for one spatial stream.
	 */
	return mode->mcs_set[0] == 0xff;
}


int vht_supported(const struct hostapd_hw_modes *mode)
{
	if (!(mode->flags & HOSTAPD_MODE_FLAG_VHT_INFO_KNOWN)) {
		/*
		 * The driver did not indicate whether it supports VHT. Assume
		 * it does to avoid connection issues.
		 */
		return 1;
	}

	/*
	 * A VHT non-AP STA shall support MCS 0-7 for one spatial stream.
	 * TODO: Verify if this complies with the standard
	 */
	return (mode->vht_mcs_set[0] & 0x3) != 3;
}


static int wpa_check_wowlan_trigger(const char *start, const char *trigger,
				    int capa_trigger, u8 *param_trigger)
{
	if (os_strcmp(start, trigger) != 0)
		return 0;
	if (!capa_trigger)
		return 0;

	*param_trigger = 1;
	return 1;
}


struct wowlan_triggers *
wpa_get_wowlan_triggers(const char *wowlan_triggers,
			const struct wpa_driver_capa *capa)
{
	struct wowlan_triggers *triggers;
	char *start, *end, *buf;
	int last;

	if (!wowlan_triggers)
		return NULL;

	buf = os_strdup(wowlan_triggers);
	if (buf == NULL)
		return NULL;

	triggers = os_zalloc(sizeof(*triggers));
	if (triggers == NULL)
		goto out;

#define CHECK_TRIGGER(trigger) \
	wpa_check_wowlan_trigger(start, #trigger,			\
				  capa->wowlan_triggers.trigger,	\
				  &triggers->trigger)

	start = buf;
	while (*start != '\0') {
		while (isblank(*start))
			start++;
		if (*start == '\0')
			break;
		end = start;
		while (!isblank(*end) && *end != '\0')
			end++;
		last = *end == '\0';
		*end = '\0';

		if (!CHECK_TRIGGER(any) &&
		    !CHECK_TRIGGER(disconnect) &&
		    !CHECK_TRIGGER(magic_pkt) &&
		    !CHECK_TRIGGER(gtk_rekey_failure) &&
		    !CHECK_TRIGGER(eap_identity_req) &&
		    !CHECK_TRIGGER(four_way_handshake) &&
		    !CHECK_TRIGGER(rfkill_release)) {
			wpa_printf(MSG_DEBUG,
				   "Unknown/unsupported wowlan trigger '%s'",
				   start);
			os_free(triggers);
			triggers = NULL;
			goto out;
		}

		if (last)
			break;
		start = end + 1;
	}
#undef CHECK_TRIGGER

out:
	os_free(buf);
	return triggers;
}