2 * IEEE 802.11 Common routines
3 * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
18 #include "ieee802_11_defs.h"
19 #include "ieee802_11_common.h"
22 static int ieee802_11_parse_vendor_specific(u8 *pos, size_t elen,
23 struct ieee802_11_elems *elems,
28 /* first 3 bytes in vendor specific information element are the IEEE
29 * OUI of the vendor. The following byte is used a vendor specific
33 wpa_printf(MSG_MSGDUMP, "short vendor specific "
34 "information element ignored (len=%lu)",
35 (unsigned long) elen);
40 oui = WPA_GET_BE24(pos);
43 /* Microsoft/Wi-Fi information elements are further typed and
47 /* Microsoft OUI (00:50:F2) with OUI Type 1:
48 * real WPA information element */
50 elems->wpa_ie_len = elen;
52 case WME_OUI_TYPE: /* this is a Wi-Fi WME info. element */
54 wpa_printf(MSG_MSGDUMP, "short WME "
55 "information element ignored "
57 (unsigned long) elen);
61 case WME_OUI_SUBTYPE_INFORMATION_ELEMENT:
62 case WME_OUI_SUBTYPE_PARAMETER_ELEMENT:
64 elems->wme_len = elen;
66 case WME_OUI_SUBTYPE_TSPEC_ELEMENT:
67 elems->wme_tspec = pos;
68 elems->wme_tspec_len = elen;
71 wpa_printf(MSG_MSGDUMP, "unknown WME "
72 "information element ignored "
73 "(subtype=%d len=%lu)",
74 pos[4], (unsigned long) elen);
79 /* Wi-Fi Protected Setup (WPS) IE */
81 elems->wps_ie_len = elen;
84 wpa_printf(MSG_MSGDUMP, "Unknown Microsoft "
85 "information element ignored "
86 "(type=%d len=%lu)\n",
87 pos[3], (unsigned long) elen);
94 case VENDOR_HT_CAPAB_OUI_TYPE:
95 elems->vendor_ht_cap = pos;
96 elems->vendor_ht_cap_len = elen;
99 wpa_printf(MSG_MSGDUMP, "Unknown Broadcom "
100 "information element ignored "
101 "(type=%d len=%lu)\n",
102 pos[3], (unsigned long) elen);
108 wpa_printf(MSG_MSGDUMP, "unknown vendor specific information "
109 "element ignored (vendor OUI %02x:%02x:%02x "
111 pos[0], pos[1], pos[2], (unsigned long) elen);
120 * ieee802_11_parse_elems - Parse information elements in management frames
121 * @start: Pointer to the start of IEs
122 * @len: Length of IE buffer in octets
123 * @elems: Data structure for parsed elements
124 * @show_errors: Whether to show parsing errors in debug log
125 * Returns: Parsing result
127 ParseRes ieee802_11_parse_elems(u8 *start, size_t len,
128 struct ieee802_11_elems *elems,
135 os_memset(elems, 0, sizeof(*elems));
146 wpa_printf(MSG_DEBUG, "IEEE 802.11 element "
147 "parse failed (id=%d elen=%d "
149 id, elen, (unsigned long) left);
150 wpa_hexdump(MSG_MSGDUMP, "IEs", start, len);
158 elems->ssid_len = elen;
160 case WLAN_EID_SUPP_RATES:
161 elems->supp_rates = pos;
162 elems->supp_rates_len = elen;
164 case WLAN_EID_FH_PARAMS:
165 elems->fh_params = pos;
166 elems->fh_params_len = elen;
168 case WLAN_EID_DS_PARAMS:
169 elems->ds_params = pos;
170 elems->ds_params_len = elen;
172 case WLAN_EID_CF_PARAMS:
173 elems->cf_params = pos;
174 elems->cf_params_len = elen;
178 elems->tim_len = elen;
180 case WLAN_EID_IBSS_PARAMS:
181 elems->ibss_params = pos;
182 elems->ibss_params_len = elen;
184 case WLAN_EID_CHALLENGE:
185 elems->challenge = pos;
186 elems->challenge_len = elen;
188 case WLAN_EID_ERP_INFO:
189 elems->erp_info = pos;
190 elems->erp_info_len = elen;
192 case WLAN_EID_EXT_SUPP_RATES:
193 elems->ext_supp_rates = pos;
194 elems->ext_supp_rates_len = elen;
196 case WLAN_EID_VENDOR_SPECIFIC:
197 if (ieee802_11_parse_vendor_specific(pos, elen,
204 elems->rsn_ie_len = elen;
206 case WLAN_EID_PWR_CAPABILITY:
207 elems->power_cap = pos;
208 elems->power_cap_len = elen;
210 case WLAN_EID_SUPPORTED_CHANNELS:
211 elems->supp_channels = pos;
212 elems->supp_channels_len = elen;
214 case WLAN_EID_MOBILITY_DOMAIN:
216 elems->mdie_len = elen;
218 case WLAN_EID_FAST_BSS_TRANSITION:
220 elems->ftie_len = elen;
222 case WLAN_EID_TIMEOUT_INTERVAL:
223 elems->timeout_int = pos;
224 elems->timeout_int_len = elen;
226 case WLAN_EID_HT_CAP:
227 elems->ht_capabilities = pos;
228 elems->ht_capabilities_len = elen;
230 case WLAN_EID_HT_OPERATION:
231 elems->ht_operation = pos;
232 elems->ht_operation_len = elen;
238 wpa_printf(MSG_MSGDUMP, "IEEE 802.11 element parse "
239 "ignored unknown element (id=%d elen=%d)",
251 return unknown ? ParseUnknown : ParseOK;