src/reader.cpp

   1 /*
   2  * Copyright (c) 2004 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26
  27 //
  28 // reader - token reader objects
  29 //
  30 #include "reader.h"
  31
  32
  33 Reader::Reader(const PCSC::ReaderState &state)
  34         : mToken(NULL)
  35 {
  36         mName = state.name();
  37         secdebug("reader", "%p (%s) new reader", this, name().c_str());
  38         transit(state);
  39 }
  40
  41
  42 Reader::~Reader()
  43 {
  44         secdebug("reader", "%p (%s) destroyed", this, name().c_str());
  45 }
  46
  47
  48 void Reader::kill()
  49 {
  50         if (mToken)
  51                 removeToken();
  52         NodeCore::kill();
  53 }
  54
  55
  56 void Reader::update(const PCSC::ReaderState &state)
  57 {
  58         transit(state);
  59 }
  60
  61
  62 //
  63 // State transition matrix for a reader, based on PCSC state changes
  64 //
  65 void Reader::transit(const PCSC::ReaderState &state)
  66 {
  67         if (state.state(SCARD_STATE_UNAVAILABLE)) {
  68                 // reader is unusable (probably being removed)
  69                 secdebug("reader", "%p (%s) unavailable (0x%lx)",
  70                         this, name().c_str(), state.state());
  71                 if (mToken)
  72                         removeToken();
  73         } else if (state.state(SCARD_STATE_EMPTY)) {
  74                 // reader is empty (no token present)
  75                 secdebug("reader", "%p (%s) empty (0x%lx)",
  76                         this, name().c_str(), state.state());
  77                 if (mToken)
  78                         removeToken();
  79         } else if (state.state(SCARD_STATE_PRESENT)) {
  80                 // reader has a token inserted
  81                 secdebug("reader", "%p (%s) card present (0x%lx)",
  82                         this, name().c_str(), state.state());
  83                 //@@@ is this hack worth it (with notifications in)??
  84                 if (mToken && CssmData(state) != CssmData(pcscState()))
  85                         removeToken();  // incomplete but better than nothing
  86                 //@@@ or should we call some verify-still-the-same function of tokend?
  87                 if (!mToken)
  88                         insertToken();
  89         } else {
  90                 secdebug("reader", "%p (%s) unexpected state change (0x%ld to 0x%lx)",
  91                         this, name().c_str(), mState.state(), state.state());
  92         }
  93         mState = state;
  94 }
  95
  96
  97 void Reader::insertToken()
  98 {
  99         RefPointer<Token> token = new Token();
 100         token->insert(*this);
 101         mToken = token;
 102         addReference(*token);
 103         secdebug("reader", "%p (%s) inserted token %p",
 104                 this, name().c_str(), mToken);
 105 }
 106
 107
 108 void Reader::removeToken()
 109 {
 110         secdebug("reader", "%p (%s) removing token %p",
 111                 this, name().c_str(), mToken);
 112         assert(mToken);
 113         mToken->remove();
 114         removeReference(*mToken);
 115         mToken = NULL;
 116 }
 117
 118
 119 //
 120 // Debug dump support
 121 //
 122 #if defined(DEBUGDUMP)
 123
 124 void Reader::dumpNode()
 125 {
 126         PerGlobal::dumpNode();
 127         Debug::dump(" [%s] state=0x%lx", name().c_str(), mState.state());
 128 }
 129
 130 #endif //DEBUGDUMP