1 /*
2 * Common driver-related functions
3 * Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10 #include "utils/common.h"
11 #include "driver.h"
12
wpa_scan_results_free(struct wpa_scan_results * res)13 void wpa_scan_results_free(struct wpa_scan_results *res)
14 {
15 size_t i;
16
17 if (res == NULL)
18 return;
19
20 for (i = 0; i < res->num; i++)
21 os_free(res->res[i]);
22 os_free(res->res);
23 os_free(res);
24 }
25
26
event_to_string(enum wpa_event_type event)27 const char * event_to_string(enum wpa_event_type event)
28 {
29 #define E2S(n) case EVENT_ ## n: return #n
30 switch (event) {
31 E2S(ASSOC);
32 E2S(DISASSOC);
33 E2S(MICHAEL_MIC_FAILURE);
34 E2S(SCAN_RESULTS);
35 E2S(ASSOCINFO);
36 E2S(INTERFACE_STATUS);
37 E2S(PMKID_CANDIDATE);
38 E2S(STKSTART);
39 E2S(TDLS);
40 E2S(FT_RESPONSE);
41 E2S(IBSS_RSN_START);
42 E2S(AUTH);
43 E2S(DEAUTH);
44 E2S(ASSOC_REJECT);
45 E2S(AUTH_TIMED_OUT);
46 E2S(ASSOC_TIMED_OUT);
47 E2S(WPS_BUTTON_PUSHED);
48 E2S(TX_STATUS);
49 E2S(RX_FROM_UNKNOWN);
50 E2S(RX_MGMT);
51 E2S(REMAIN_ON_CHANNEL);
52 E2S(CANCEL_REMAIN_ON_CHANNEL);
53 E2S(RX_PROBE_REQ);
54 E2S(NEW_STA);
55 E2S(EAPOL_RX);
56 E2S(SIGNAL_CHANGE);
57 E2S(INTERFACE_ENABLED);
58 E2S(INTERFACE_DISABLED);
59 E2S(CHANNEL_LIST_CHANGED);
60 E2S(INTERFACE_UNAVAILABLE);
61 E2S(BEST_CHANNEL);
62 E2S(UNPROT_DEAUTH);
63 E2S(UNPROT_DISASSOC);
64 E2S(STATION_LOW_ACK);
65 E2S(IBSS_PEER_LOST);
66 E2S(DRIVER_GTK_REKEY);
67 E2S(SCHED_SCAN_STOPPED);
68 E2S(DRIVER_CLIENT_POLL_OK);
69 E2S(EAPOL_TX_STATUS);
70 E2S(CH_SWITCH);
71 E2S(WNM);
72 E2S(CONNECT_FAILED_REASON);
73 E2S(DFS_RADAR_DETECTED);
74 E2S(DFS_CAC_FINISHED);
75 E2S(DFS_CAC_ABORTED);
76 E2S(DFS_NOP_FINISHED);
77 E2S(SURVEY);
78 E2S(SCAN_STARTED);
79 E2S(AVOID_FREQUENCIES);
80 E2S(NEW_PEER_CANDIDATE);
81 E2S(ACS_CHANNEL_SELECTED);
82 E2S(DFS_CAC_STARTED);
83 }
84
85 return "UNKNOWN";
86 #undef E2S
87 }
88
89
channel_width_to_string(enum chan_width width)90 const char * channel_width_to_string(enum chan_width width)
91 {
92 switch (width) {
93 case CHAN_WIDTH_20_NOHT:
94 return "20 MHz (no HT)";
95 case CHAN_WIDTH_20:
96 return "20 MHz";
97 case CHAN_WIDTH_40:
98 return "40 MHz";
99 case CHAN_WIDTH_80:
100 return "80 MHz";
101 case CHAN_WIDTH_80P80:
102 return "80+80 MHz";
103 case CHAN_WIDTH_160:
104 return "160 MHz";
105 default:
106 return "unknown";
107 }
108 }
109
110
ht_supported(const struct hostapd_hw_modes * mode)111 int ht_supported(const struct hostapd_hw_modes *mode)
112 {
113 if (!(mode->flags & HOSTAPD_MODE_FLAG_HT_INFO_KNOWN)) {
114 /*
115 * The driver did not indicate whether it supports HT. Assume
116 * it does to avoid connection issues.
117 */
118 return 1;
119 }
120
121 /*
122 * IEEE Std 802.11n-2009 20.1.1:
123 * An HT non-AP STA shall support all EQM rates for one spatial stream.
124 */
125 return mode->mcs_set[0] == 0xff;
126 }
127
128
vht_supported(const struct hostapd_hw_modes * mode)129 int vht_supported(const struct hostapd_hw_modes *mode)
130 {
131 if (!(mode->flags & HOSTAPD_MODE_FLAG_VHT_INFO_KNOWN)) {
132 /*
133 * The driver did not indicate whether it supports VHT. Assume
134 * it does to avoid connection issues.
135 */
136 return 1;
137 }
138
139 /*
140 * A VHT non-AP STA shall support MCS 0-7 for one spatial stream.
141 * TODO: Verify if this complies with the standard
142 */
143 return (mode->vht_mcs_set[0] & 0x3) != 3;
144 }
145
146
wpa_check_wowlan_trigger(const char * start,const char * trigger,int capa_trigger,u8 * param_trigger)147 static int wpa_check_wowlan_trigger(const char *start, const char *trigger,
148 int capa_trigger, u8 *param_trigger)
149 {
150 if (os_strcmp(start, trigger) != 0)
151 return 0;
152 if (!capa_trigger)
153 return 0;
154
155 *param_trigger = 1;
156 return 1;
157 }
158
159
160 struct wowlan_triggers *
wpa_get_wowlan_triggers(const char * wowlan_triggers,const struct wpa_driver_capa * capa)161 wpa_get_wowlan_triggers(const char *wowlan_triggers,
162 const struct wpa_driver_capa *capa)
163 {
164 struct wowlan_triggers *triggers;
165 char *start, *end, *buf;
166 int last;
167
168 if (!wowlan_triggers)
169 return NULL;
170
171 buf = os_strdup(wowlan_triggers);
172 if (buf == NULL)
173 return NULL;
174
175 triggers = os_zalloc(sizeof(*triggers));
176 if (triggers == NULL)
177 goto out;
178
179 #define CHECK_TRIGGER(trigger) \
180 wpa_check_wowlan_trigger(start, #trigger, \
181 capa->wowlan_triggers.trigger, \
182 &triggers->trigger)
183
184 start = buf;
185 while (*start != '\0') {
186 while (isblank((unsigned char) *start))
187 start++;
188 if (*start == '\0')
189 break;
190 end = start;
191 while (!isblank((unsigned char) *end) && *end != '\0')
192 end++;
193 last = *end == '\0';
194 *end = '\0';
195
196 if (!CHECK_TRIGGER(any) &&
197 !CHECK_TRIGGER(disconnect) &&
198 !CHECK_TRIGGER(magic_pkt) &&
199 !CHECK_TRIGGER(gtk_rekey_failure) &&
200 !CHECK_TRIGGER(eap_identity_req) &&
201 !CHECK_TRIGGER(four_way_handshake) &&
202 !CHECK_TRIGGER(rfkill_release)) {
203 wpa_printf(MSG_DEBUG,
204 "Unknown/unsupported wowlan trigger '%s'",
205 start);
206 os_free(triggers);
207 triggers = NULL;
208 goto out;
209 }
210
211 if (last)
212 break;
213 start = end + 1;
214 }
215 #undef CHECK_TRIGGER
216
217 out:
218 os_free(buf);
219 return triggers;
220 }
221