1 /* 2 * IEEE 802.11 Common routines 3 * Copyright (c) 2002-2019, Jouni Malinen <j (at) 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 #ifndef IEEE802_11_COMMON_H 10 #define IEEE802_11_COMMON_H 11 12 #include "defs.h" 13 #include "ieee802_11_defs.h" 14 15 struct element { 16 u8 id; 17 u8 datalen; 18 u8 data[]; 19 } STRUCT_PACKED; 20 21 struct hostapd_hw_modes; 22 23 #define MAX_NOF_MB_IES_SUPPORTED 5 24 25 struct mb_ies_info { 26 struct { 27 const u8 *ie; 28 u8 ie_len; 29 } ies[MAX_NOF_MB_IES_SUPPORTED]; 30 u8 nof_ies; 31 }; 32 33 /* Parsed Information Elements */ 34 struct ieee802_11_elems { 35 const u8 *ssid; 36 const u8 *supp_rates; 37 const u8 *ds_params; 38 const u8 *challenge; 39 const u8 *erp_info; 40 const u8 *ext_supp_rates; 41 const u8 *wpa_ie; 42 const u8 *rsn_ie; 43 const u8 *wmm; /* WMM Information or Parameter Element */ 44 const u8 *wmm_tspec; 45 const u8 *wps_ie; 46 const u8 *supp_channels; 47 const u8 *mdie; 48 const u8 *ftie; 49 const u8 *timeout_int; 50 const u8 *ht_capabilities; 51 const u8 *ht_operation; 52 const u8 *mesh_config; 53 const u8 *mesh_id; 54 const u8 *peer_mgmt; 55 const u8 *vht_capabilities; 56 const u8 *vht_operation; 57 const u8 *vht_opmode_notif; 58 const u8 *vendor_ht_cap; 59 const u8 *vendor_vht; 60 const u8 *p2p; 61 const u8 *wfd; 62 const u8 *link_id; 63 const u8 *interworking; 64 const u8 *qos_map_set; 65 const u8 *hs20; 66 const u8 *ext_capab; 67 const u8 *bss_max_idle_period; 68 const u8 *ssid_list; 69 const u8 *osen; 70 const u8 *mbo; 71 const u8 *ampe; 72 const u8 *mic; 73 const u8 *pref_freq_list; 74 const u8 *supp_op_classes; 75 const u8 *rrm_enabled; 76 const u8 *cag_number; 77 const u8 *ap_csn; 78 const u8 *fils_indic; 79 const u8 *dils; 80 const u8 *assoc_delay_info; 81 const u8 *fils_req_params; 82 const u8 *fils_key_confirm; 83 const u8 *fils_session; 84 const u8 *fils_hlp; 85 const u8 *fils_ip_addr_assign; 86 const u8 *key_delivery; 87 const u8 *fils_wrapped_data; 88 const u8 *fils_pk; 89 const u8 *fils_nonce; 90 const u8 *owe_dh; 91 const u8 *power_capab; 92 const u8 *roaming_cons_sel; 93 const u8 *password_id; 94 const u8 *oci; 95 const u8 *multi_ap; 96 const u8 *he_capabilities; 97 98 u8 ssid_len; 99 u8 supp_rates_len; 100 u8 challenge_len; 101 u8 ext_supp_rates_len; 102 u8 wpa_ie_len; 103 u8 rsn_ie_len; 104 u8 wmm_len; /* 7 = WMM Information; 24 = WMM Parameter */ 105 u8 wmm_tspec_len; 106 u8 wps_ie_len; 107 u8 supp_channels_len; 108 u8 mdie_len; 109 u8 ftie_len; 110 u8 mesh_config_len; 111 u8 mesh_id_len; 112 u8 peer_mgmt_len; 113 u8 vendor_ht_cap_len; 114 u8 vendor_vht_len; 115 u8 p2p_len; 116 u8 wfd_len; 117 u8 interworking_len; 118 u8 qos_map_set_len; 119 u8 hs20_len; 120 u8 ext_capab_len; 121 u8 ssid_list_len; 122 u8 osen_len; 123 u8 mbo_len; 124 u8 ampe_len; 125 u8 mic_len; 126 u8 pref_freq_list_len; 127 u8 supp_op_classes_len; 128 u8 rrm_enabled_len; 129 u8 cag_number_len; 130 u8 fils_indic_len; 131 u8 dils_len; 132 u8 fils_req_params_len; 133 u8 fils_key_confirm_len; 134 u8 fils_hlp_len; 135 u8 fils_ip_addr_assign_len; 136 u8 key_delivery_len; 137 u8 fils_wrapped_data_len; 138 u8 fils_pk_len; 139 u8 owe_dh_len; 140 u8 power_capab_len; 141 u8 roaming_cons_sel_len; 142 u8 password_id_len; 143 u8 oci_len; 144 u8 multi_ap_len; 145 u8 he_capabilities_len; 146 147 struct mb_ies_info mb_ies; 148 }; 149 150 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes; 151 152 ParseRes ieee802_11_parse_elems(const u8 *start, size_t len, 153 struct ieee802_11_elems *elems, 154 int show_errors); 155 int ieee802_11_ie_count(const u8 *ies, size_t ies_len); 156 struct wpabuf * ieee802_11_vendor_ie_concat(const u8 *ies, size_t ies_len, 157 u32 oui_type); 158 struct ieee80211_hdr; 159 const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len); 160 161 struct hostapd_wmm_ac_params { 162 int cwmin; 163 int cwmax; 164 int aifs; 165 int txop_limit; /* in units of 32us */ 166 int admission_control_mandatory; 167 }; 168 169 int hostapd_config_wmm_ac(struct hostapd_wmm_ac_params wmm_ac_params[], 170 const char *name, const char *val); 171 enum hostapd_hw_mode ieee80211_freq_to_chan(int freq, u8 *channel); 172 int ieee80211_chan_to_freq(const char *country, u8 op_class, u8 chan); 173 enum hostapd_hw_mode ieee80211_freq_to_channel_ext(unsigned int freq, 174 int sec_channel, int vht, 175 u8 *op_class, u8 *channel); 176 int ieee80211_chaninfo_to_channel(unsigned int freq, enum chan_width chanwidth, 177 int sec_channel, u8 *op_class, u8 *channel); 178 int ieee80211_is_dfs(int freq, const struct hostapd_hw_modes *modes, 179 u16 num_modes); 180 enum phy_type ieee80211_get_phy_type(int freq, int ht, int vht); 181 182 int supp_rates_11b_only(struct ieee802_11_elems *elems); 183 int mb_ies_info_by_ies(struct mb_ies_info *info, const u8 *ies_buf, 184 size_t ies_len); 185 struct wpabuf * mb_ies_by_info(struct mb_ies_info *info); 186 187 const char * fc2str(u16 fc); 188 189 struct oper_class_map { 190 enum hostapd_hw_mode mode; 191 u8 op_class; 192 u8 min_chan; 193 u8 max_chan; 194 u8 inc; 195 enum { BW20, BW40PLUS, BW40MINUS, BW80, BW2160, BW160, BW80P80 } bw; 196 enum { P2P_SUPP, NO_P2P_SUPP } p2p; 197 }; 198 199 extern const struct oper_class_map global_op_class[]; 200 extern size_t global_op_class_size; 201 202 const u8 * get_ie(const u8 *ies, size_t len, u8 eid); 203 const u8 * get_ie_ext(const u8 *ies, size_t len, u8 ext); 204 const u8 * get_vendor_ie(const u8 *ies, size_t len, u32 vendor_type); 205 206 size_t mbo_add_ie(u8 *buf, size_t len, const u8 *attr, size_t attr_len); 207 208 size_t add_multi_ap_ie(u8 *buf, size_t len, u8 value); 209 210 struct country_op_class { 211 u8 country_op_class; 212 u8 global_op_class; 213 }; 214 215 u8 country_to_global_op_class(const char *country, u8 op_class); 216 217 const struct oper_class_map * get_oper_class(const char *country, u8 op_class); 218 int oper_class_bw_to_int(const struct oper_class_map *map); 219 220 int ieee802_11_parse_candidate_list(const char *pos, u8 *nei_rep, 221 size_t nei_rep_len); 222 223 int ieee802_11_ext_capab(const u8 *ie, unsigned int capab); 224 225 /* element iteration helpers */ 226 #define for_each_element(_elem, _data, _datalen) \ 227 for (_elem = (const struct element *) (_data); \ 228 (const u8 *) (_data) + (_datalen) - (const u8 *) _elem >= \ 229 (int) sizeof(*_elem) && \ 230 (const u8 *) (_data) + (_datalen) - (const u8 *) _elem >= \ 231 (int) sizeof(*_elem) + _elem->datalen; \ 232 _elem = (const struct element *) (_elem->data + _elem->datalen)) 233 234 #define for_each_element_id(element, _id, data, datalen) \ 235 for_each_element(element, data, datalen) \ 236 if (element->id == (_id)) 237 238 #define for_each_element_extid(element, extid, _data, _datalen) \ 239 for_each_element(element, _data, _datalen) \ 240 if (element->id == WLAN_EID_EXTENSION && \ 241 element->datalen > 0 && \ 242 element->data[0] == (extid)) 243 244 #define for_each_subelement(sub, element) \ 245 for_each_element(sub, (element)->data, (element)->datalen) 246 247 #define for_each_subelement_id(sub, id, element) \ 248 for_each_element_id(sub, id, (element)->data, (element)->datalen) 249 250 #define for_each_subelement_extid(sub, extid, element) \ 251 for_each_element_extid(sub, extid, (element)->data, (element)->datalen) 252 253 /** 254 * for_each_element_completed - Determine if element parsing consumed all data 255 * @element: Element pointer after for_each_element() or friends 256 * @data: Same data pointer as passed to for_each_element() or friends 257 * @datalen: Same data length as passed to for_each_element() or friends 258 * 259 * This function returns 1 if all the data was parsed or considered 260 * while walking the elements. Only use this if your for_each_element() 261 * loop cannot be broken out of, otherwise it always returns 0. 262 * 263 * If some data was malformed, this returns %false since the last parsed 264 * element will not fill the whole remaining data. 265 */ 266 static inline int for_each_element_completed(const struct element *element, 267 const void *data, size_t datalen) 268 { 269 return (const u8 *) element == (const u8 *) data + datalen; 270 } 271 272 #endif /* IEEE802_11_COMMON_H */ 273
