drivers/net/wireless/rtlink/auth_rsp.c

   1 /*************************************************************************
   2  * Ralink Tech Inc.                                                      *
   3  * 4F, No. 2 Technology 5th Rd.                                          *
   4  * Science-based Industrial Park                                         *
   5  * Hsin-chu, Taiwan, R.O.C.                                              *
   6  *                                                                       *
   7  * (c) Copyright 2002, Ralink Technology, Inc.                           *
   8  *                                                                       *
   9  * This program is free software; you can redistribute it and/or modify  *
  10  * it under the terms of the GNU General Public License as published by  *
  11  * the Free Software Foundation; either version 2 of the License, or     *
  12  * (at your option) any later version.                                   *
  13  *                                                                       *
  14  * This program is distributed in the hope that it will be useful,       *
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  17  * GNU General Public License for more details.                          *
  18  *                                                                       *
  19  * You should have received a copy of the GNU General Public License     *
  20  * along with this program; if not, write to the                         *
  21  * Free Software Foundation, Inc.,                                       *
  22  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  23  *                                                                       *
  24  ************************************************************************/
  25
  26 #include "rt_config.h"
  27
  28 /*
  29     ==========================================================================
  30     Description:
  31         authentication state machine init procedure
  32     Parameters:
  33         Sm - the state machine
  34     Note:
  35         the state machine looks like the following
  36
  37                                         AUTH_RSP_IDLE                   AUTH_RSP_WAIT_CHAL
  38     MT2_AUTH_CHALLENGE_TIMEOUT    auth_rsp_challenge_timeout_action    auth_rsp_challenge_timeout_action
  39     MT2_PEER_AUTH_ODD        peer_auth_at_auth_rsp_idle_action peer_auth_at_auth_rsp_wait_action
  40     MT2_PEER_DEAUTH                 peer_deauth_action                 peer_deauth_action
  41     ==========================================================================
  42  */
  43 VOID AuthRspStateMachineInit(
  44     IN PRTMP_ADAPTER pAd,
  45     IN PSTATE_MACHINE Sm,
  46     IN STATE_MACHINE_FUNC Trans[])
  47 {
  48     ULONG        NOW;
  49
  50     StateMachineInit(Sm, (STATE_MACHINE_FUNC*)Trans, MAX_AUTH_RSP_STATE, MAX_AUTH_RSP_MSG, (STATE_MACHINE_FUNC)Drop, AUTH_RSP_IDLE, AUTH_RSP_MACHINE_BASE);
  51
  52     // column 1
  53 //  StateMachineSetAction(Sm, AUTH_RSP_IDLE, MT2_AUTH_CHALLENGEG_TIMEOUT, (STATE_MACHINE_FUNC)AuthRspChallengeTimeoutAction);
  54 //  StateMachineSetAction(Sm, AUTH_RSP_IDLE, MT2_PEER_AUTH_ODD, (STATE_MACHINE_FUNC)PeerAuthAtAuthRspIdleAction);
  55     StateMachineSetAction(Sm, AUTH_RSP_IDLE, MT2_PEER_DEAUTH, (STATE_MACHINE_FUNC)PeerDeauthAction);
  56
  57     // column 2
  58 //  StateMachineSetAction(Sm, AUTH_RSP_WAIT_CHAL, MT2_PEER_AUTH_ODD, (STATE_MACHINE_FUNC)PeerAuthAtAuthRspWaitAction);
  59 //  StateMachineSetAction(Sm, AUTH_RSP_WAIT_CHAL, MT2_AUTH_CHALLENGE_TIMEOUT, (STATE_MACHINE_FUNC)AuthRspChallengeTimeoutAction);
  60     StateMachineSetAction(Sm, AUTH_RSP_WAIT_CHAL, MT2_PEER_DEAUTH, (STATE_MACHINE_FUNC)PeerDeauthAction);
  61
  62     // initialize timer
  63     RTMPInitTimer(pAd, &pAd->Mlme.AuthRspAux.AuthRspTimer, AuthRspChallengeTimeout);
  64
  65     // initialize the random number generator
  66     NOW = jiffies;
  67     LfsrInit(pAd, NOW);
  68 }
  69
  70
  71 /*
  72     ==========================================================================
  73     Description:
  74         challenge time out, called by timer thread
  75     ==========================================================================
  76  */
  77 VOID AuthRspChallengeTimeout(
  78     IN  unsigned long data)
  79 {
  80     RTMP_ADAPTER *pAd = (RTMP_ADAPTER *)data;
  81
  82     DBGPRINT(RT_DEBUG_TRACE,"AUTH_RSP - AuthRspChallengeTimeout \n");
  83     MlmeEnqueue(&pAd->Mlme.Queue, AUTH_RSP_STATE_MACHINE, MT2_AUTH_CHALLENGE_TIMEOUT, 0, NULL);
  84     MlmeHandler(pAd);
  85 }
  86
  87 /*
  88     ==========================================================================
  89     Description:
  90     ==========================================================================
  91 */
  92 VOID PeerAuthSimpleRspGenAndSend(
  93     IN PRTMP_ADAPTER pAd,
  94     IN PMACHDR Hdr,
  95     IN USHORT Alg,
  96     IN USHORT Seq,
  97     IN USHORT Reason,
  98     IN USHORT Status)
  99 {
 100     MACHDR            AuthHdr;
 101     UINT              FrameLen = 0;
 102     UCHAR            *OutBuffer = NULL;
 103     NDIS_STATUS       NStatus;
 104
 105     NStatus = MlmeAllocateMemory(pAd, (PVOID)&OutBuffer);  //Get an unused nonpaged memory
 106     if (NStatus != NDIS_STATUS_SUCCESS)
 107         return;
 108
 109     if (Reason == MLME_SUCCESS)
 110     {
 111         DBGPRINT(RT_DEBUG_TRACE, "Send AUTH response (seq#2)...\n");
 112         MgtMacHeaderInit(pAd, &AuthHdr, SUBTYPE_AUTH, 0, &Hdr->Addr2, &pAd->PortCfg.Bssid);
 113         MakeOutgoingFrame(OutBuffer,            &FrameLen,
 114                           sizeof(MACHDR),       &AuthHdr,
 115                           2,                    &Alg,
 116                           2,                    &Seq,
 117                           2,                    &Reason,
 118                           END_OF_ARGS);
 119         MiniportMMRequest(pAd, OutBuffer, FrameLen);
 120     }
 121     else
 122     {
 123         MlmeFreeMemory(pAd, OutBuffer);
 124         DBGPRINT(RT_DEBUG_TRACE, "Peer AUTH fail...\n");
 125     }
 126 }
 127
 128 /*
 129     ==========================================================================
 130     Description:
 131     ==========================================================================
 132 */
 133 VOID PeerDeauthAction(
 134     IN PRTMP_ADAPTER pAd,
 135     IN PMLME_QUEUE_ELEM Elem)
 136 {
 137     MACADDR     Addr2;
 138     USHORT      Reason;
 139
 140     if (PeerDeauthSanity(pAd, Elem->Msg, Elem->MsgLen, &Addr2, &Reason))
 141     {
 142         if (INFRA_ON(pAd) && MAC_ADDR_EQUAL(&Addr2, &pAd->PortCfg.Bssid))
 143         {
 144             RTMPCancelTimer(&pAd->Mlme.AuthRspAux.AuthRspTimer);
 145             DBGPRINT(RT_DEBUG_TRACE,"AUTH_RSP - receive DE-AUTH from our AP, reason(%d)\n",Reason);
 146             LinkDown(pAd);
 147         }
 148     }
 149     else
 150     {
 151         DBGPRINT(RT_DEBUG_TRACE,"AUTH_RSP - PeerDeauthAction() sanity check fail\n");
 152     }
 153 }
 154