contrib/hostapd/hostapd/mlme.c

   1 /*
   2  * hostapd / IEEE 802.11 MLME
   3  * Copyright 2003-2006, Jouni Malinen <j@w1.fi>
   4  * Copyright 2003-2004, Instant802 Networks, Inc.
   5  * Copyright 2005-2006, Devicescape Software, Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Alternatively, this software may be distributed under the terms of BSD
  12  * license.
  13  *
  14  * See README and COPYING for more details.
  15  */
  16
  17 #include "includes.h"
  18
  19 #include "hostapd.h"
  20 #include "ieee802_11.h"
  21 #include "wpa.h"
  22 #include "mlme.h"
  23
  24
  25 static const char * mlme_auth_alg_str(int alg)
  26 {
  27         switch (alg) {
  28         case WLAN_AUTH_OPEN:
  29                 return "OPEN_SYSTEM";
  30         case WLAN_AUTH_SHARED_KEY:
  31                 return "SHARED_KEY";
  32         case WLAN_AUTH_FT:
  33                 return "FT";
  34         }
  35
  36         return "unknown";
  37 }
  38
  39
  40 /**
  41  * mlme_authenticate_indication - Report the establishment of an authentication
  42  * relationship with a specific peer MAC entity
  43  * @hapd: BSS data
  44  * @sta: peer STA data
  45  *
  46  * MLME calls this function as a result of the establishment of an
  47  * authentication relationship with a specific peer MAC entity that
  48  * resulted from an authentication procedure that was initiated by
  49  * that specific peer MAC entity.
  50  *
  51  * PeerSTAAddress = sta->addr
  52  * AuthenticationType = sta->auth_alg (WLAN_AUTH_OPEN / WLAN_AUTH_SHARED_KEY)
  53  */
  54 void mlme_authenticate_indication(struct hostapd_data *hapd,
  55                                   struct sta_info *sta)
  56 {
  57         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_MLME,
  58                        HOSTAPD_LEVEL_DEBUG,
  59                        "MLME-AUTHENTICATE.indication(" MACSTR ", %s)",
  60                        MAC2STR(sta->addr), mlme_auth_alg_str(sta->auth_alg));
  61         if (sta->auth_alg != WLAN_AUTH_FT && !(sta->flags & WLAN_STA_MFP))
  62                 mlme_deletekeys_request(hapd, sta);
  63 }
  64
  65
  66 /**
  67  * mlme_deauthenticate_indication - Report the invalidation of an
  68  * authentication relationship with a specific peer MAC entity
  69  * @hapd: BSS data
  70  * @sta: Peer STA data
  71  * @reason_code: ReasonCode from Deauthentication frame
  72  *
  73  * MLME calls this function as a result of the invalidation of an
  74  * authentication relationship with a specific peer MAC entity.
  75  *
  76  * PeerSTAAddress = sta->addr
  77  */
  78 void mlme_deauthenticate_indication(struct hostapd_data *hapd,
  79                                     struct sta_info *sta, u16 reason_code)
  80 {
  81         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_MLME,
  82                        HOSTAPD_LEVEL_DEBUG,
  83                        "MLME-DEAUTHENTICATE.indication(" MACSTR ", %d)",
  84                        MAC2STR(sta->addr), reason_code);
  85         mlme_deletekeys_request(hapd, sta);
  86 }
  87
  88
  89 /**
  90  * mlme_associate_indication - Report the establishment of an association with
  91  * a specific peer MAC entity
  92  * @hapd: BSS data
  93  * @sta: peer STA data
  94  *
  95  * MLME calls this function as a result of the establishment of an
  96  * association with a specific peer MAC entity that resulted from an
  97  * association procedure that was initiated by that specific peer MAC entity.
  98  *
  99  * PeerSTAAddress = sta->addr
 100  */
 101 void mlme_associate_indication(struct hostapd_data *hapd, struct sta_info *sta)
 102 {
 103         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_MLME,
 104                        HOSTAPD_LEVEL_DEBUG,
 105                        "MLME-ASSOCIATE.indication(" MACSTR ")",
 106                        MAC2STR(sta->addr));
 107         if (sta->auth_alg != WLAN_AUTH_FT)
 108                 mlme_deletekeys_request(hapd, sta);
 109 }
 110
 111
 112 /**
 113  * mlme_reassociate_indication - Report the establishment of an reassociation
 114  * with a specific peer MAC entity
 115  * @hapd: BSS data
 116  * @sta: peer STA data
 117  *
 118  * MLME calls this function as a result of the establishment of an
 119  * reassociation with a specific peer MAC entity that resulted from a
 120  * reassociation procedure that was initiated by that specific peer MAC entity.
 121  *
 122  * PeerSTAAddress = sta->addr
 123  *
 124  * sta->previous_ap contains the "Current AP" information from ReassocReq.
 125  */
 126 void mlme_reassociate_indication(struct hostapd_data *hapd,
 127                                  struct sta_info *sta)
 128 {
 129         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_MLME,
 130                        HOSTAPD_LEVEL_DEBUG,
 131                        "MLME-REASSOCIATE.indication(" MACSTR ")",
 132                        MAC2STR(sta->addr));
 133         if (sta->auth_alg != WLAN_AUTH_FT)
 134                 mlme_deletekeys_request(hapd, sta);
 135 }
 136
 137
 138 /**
 139  * mlme_disassociate_indication - Report disassociation with a specific peer
 140  * MAC entity
 141  * @hapd: BSS data
 142  * @sta: Peer STA data
 143  * @reason_code: ReasonCode from Disassociation frame
 144  *
 145  * MLME calls this function as a result of the invalidation of an association
 146  * relationship with a specific peer MAC entity.
 147  *
 148  * PeerSTAAddress = sta->addr
 149  */
 150 void mlme_disassociate_indication(struct hostapd_data *hapd,
 151                                   struct sta_info *sta, u16 reason_code)
 152 {
 153         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_MLME,
 154                        HOSTAPD_LEVEL_DEBUG,
 155                        "MLME-DISASSOCIATE.indication(" MACSTR ", %d)",
 156                        MAC2STR(sta->addr), reason_code);
 157         mlme_deletekeys_request(hapd, sta);
 158 }
 159
 160
 161 void mlme_michaelmicfailure_indication(struct hostapd_data *hapd,
 162                                        const u8 *addr)
 163 {
 164         hostapd_logger(hapd, addr, HOSTAPD_MODULE_MLME,
 165                        HOSTAPD_LEVEL_DEBUG,
 166                        "MLME-MichaelMICFailure.indication(" MACSTR ")",
 167                        MAC2STR(addr));
 168 }
 169
 170
 171 void mlme_deletekeys_request(struct hostapd_data *hapd, struct sta_info *sta)
 172 {
 173         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_MLME,
 174                        HOSTAPD_LEVEL_DEBUG,
 175                        "MLME-DELETEKEYS.request(" MACSTR ")",
 176                        MAC2STR(sta->addr));
 177
 178         if (sta->wpa_sm)
 179                 wpa_remove_ptk(sta->wpa_sm);
 180 }