drivers/net/wireless/rtlink.org/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  * (c) Copyright 2002, Ralink Technology, Inc.
   7  *
   8  * All rights reserved. Ralink's source code is an unpublished work and the
   9  * use of a copyright notice does not imply otherwise. This source code
  10  * contains confidential trade secret material of Ralink Tech. Any attemp
  11  * or participation in deciphering, decoding, reverse engineering or in any
  12  * way altering the source code is stricitly prohibited, unless the prior
  13  * written consent of Ralink Technology, Inc. is obtained.
  14  ****************************************************************************/
  15
  16 #include "rt_config.h"
  17
  18 /*
  19     ==========================================================================
  20     Description:
  21         authentication state machine init procedure
  22     Parameters:
  23         Sm - the state machine
  24     Note:
  25         the state machine looks like the following
  26
  27                                         AUTH_RSP_IDLE                   AUTH_RSP_WAIT_CHAL
  28     MT2_AUTH_CHALLENGE_TIMEOUT    auth_rsp_challenge_timeout_action    auth_rsp_challenge_timeout_action
  29     MT2_PEER_AUTH_ODD        peer_auth_at_auth_rsp_idle_action peer_auth_at_auth_rsp_wait_action
  30     MT2_PEER_DEAUTH                 peer_deauth_action                 peer_deauth_action
  31     ==========================================================================
  32  */
  33 VOID AuthRspStateMachineInit(
  34     IN PRTMP_ADAPTER pAd,
  35     IN PSTATE_MACHINE Sm,
  36     IN STATE_MACHINE_FUNC Trans[])
  37 {
  38     ULONG        NOW;
  39
  40     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);
  41
  42     // column 1
  43 //  StateMachineSetAction(Sm, AUTH_RSP_IDLE, MT2_AUTH_CHALLENGEG_TIMEOUT, (STATE_MACHINE_FUNC)AuthRspChallengeTimeoutAction);
  44 //  StateMachineSetAction(Sm, AUTH_RSP_IDLE, MT2_PEER_AUTH_ODD, (STATE_MACHINE_FUNC)PeerAuthAtAuthRspIdleAction);
  45     StateMachineSetAction(Sm, AUTH_RSP_IDLE, MT2_PEER_DEAUTH, (STATE_MACHINE_FUNC)PeerDeauthAction);
  46
  47     // column 2
  48 //  StateMachineSetAction(Sm, AUTH_RSP_WAIT_CHAL, MT2_PEER_AUTH_ODD, (STATE_MACHINE_FUNC)PeerAuthAtAuthRspWaitAction);
  49 //  StateMachineSetAction(Sm, AUTH_RSP_WAIT_CHAL, MT2_AUTH_CHALLENGE_TIMEOUT, (STATE_MACHINE_FUNC)AuthRspChallengeTimeoutAction);
  50     StateMachineSetAction(Sm, AUTH_RSP_WAIT_CHAL, MT2_PEER_DEAUTH, (STATE_MACHINE_FUNC)PeerDeauthAction);
  51
  52     // initialize timer
  53     RTMPInitTimer(pAd, &pAd->Mlme.AuthRspAux.AuthRspTimer, AuthRspChallengeTimeout);
  54
  55     // initialize the random number generator
  56     NOW = jiffies;
  57     LfsrInit(pAd, NOW);
  58 }
  59
  60
  61 /*
  62     ==========================================================================
  63     Description:
  64         challenge time out, called by timer thread
  65     ==========================================================================
  66  */
  67 VOID AuthRspChallengeTimeout(
  68     IN  unsigned long data)
  69 {
  70     RTMP_ADAPTER *pAd = (RTMP_ADAPTER *)data;
  71
  72     DBGPRINT(RT_DEBUG_TRACE,"AUTH_RSP - AuthRspChallengeTimeout \n");
  73     MlmeEnqueue(&pAd->Mlme.Queue, AUTH_RSP_STATE_MACHINE, MT2_AUTH_CHALLENGE_TIMEOUT, 0, NULL);
  74     MlmeHandler(pAd);
  75 }
  76
  77 /*
  78     ==========================================================================
  79     Description:
  80     ==========================================================================
  81 */
  82 VOID PeerAuthSimpleRspGenAndSend(
  83     IN PRTMP_ADAPTER pAd,
  84     IN PMACHDR Hdr,
  85     IN USHORT Alg,
  86     IN USHORT Seq,
  87     IN USHORT Reason,
  88     IN USHORT Status)
  89 {
  90     MACHDR            AuthHdr;
  91     UINT              FrameLen = 0;
  92     UCHAR            *OutBuffer = NULL;
  93     NDIS_STATUS       NStatus;
  94
  95     NStatus = MlmeAllocateMemory(pAd, (PVOID)&OutBuffer);  //Get an unused nonpaged memory
  96     if (NStatus != NDIS_STATUS_SUCCESS)
  97         return;
  98
  99     if (Reason == MLME_SUCCESS)
 100     {
 101         DBGPRINT(RT_DEBUG_TRACE, "Send AUTH response (seq#2)...\n");
 102         MgtMacHeaderInit(pAd, &AuthHdr, SUBTYPE_AUTH, 0, &Hdr->Addr2, &pAd->PortCfg.Bssid);
 103         MakeOutgoingFrame(OutBuffer,            &FrameLen,
 104                           sizeof(MACHDR),       &AuthHdr,
 105                           2,                    &Alg,
 106                           2,                    &Seq,
 107                           2,                    &Reason,
 108                           END_OF_ARGS);
 109         MiniportMMRequest(pAd, OutBuffer, FrameLen);
 110     }
 111     else
 112     {
 113         MlmeFreeMemory(pAd, OutBuffer);
 114         DBGPRINT(RT_DEBUG_TRACE, "Peer AUTH fail...\n");
 115     }
 116 }
 117
 118 /*
 119     ==========================================================================
 120     Description:
 121     ==========================================================================
 122 */
 123 VOID PeerDeauthAction(
 124     IN PRTMP_ADAPTER pAd,
 125     IN PMLME_QUEUE_ELEM Elem)
 126 {
 127     MACADDR     Addr2;
 128     USHORT      Reason;
 129
 130     if (PeerDeauthSanity(pAd, Elem->Msg, Elem->MsgLen, &Addr2, &Reason))
 131     {
 132         if (INFRA_ON(pAd) && MAC_ADDR_EQUAL(&Addr2, &pAd->PortCfg.Bssid))
 133         {
 134             RTMPCancelTimer(&pAd->Mlme.AuthRspAux.AuthRspTimer);
 135             DBGPRINT(RT_DEBUG_TRACE,"AUTH_RSP - receive DE-AUTH from our AP\n");
 136             LinkDown(pAd);
 137         }
 138     }
 139     else
 140     {
 141         DBGPRINT(RT_DEBUG_TRACE,"AUTH_RSP - PeerDeauthAction() sanity check fail\n");
 142     }
 143 }
 144