7 char hexDigit( char c ) {
23 std::string toHex( const char* buf, int len ) {
24 std::string data = "000000";
26 for( int i = 0; i < len; i++ ) {
27 data.append( 1, ' ' );
28 data.append( 1, hexDigit( ( buf[i] >> 4 ) & 0xF ) );
29 data.append( 1, hexDigit( buf[i] & 0xF ) );
36 this->buffer = std::vector<char>( 4096 );
37 this->decodeTarget = 0;
42 void SlipBIO::setTarget( std::shared_ptr<OpensslBIO> target ) {
43 this->target = target;
46 SlipBIO::SlipBIO( std::shared_ptr<OpensslBIO> target ) {
47 this->target = target;
48 this->buffer = std::vector<char>( 4096 );
49 this->decodeTarget = 0;
56 SlipBIO::~SlipBIO() {}
58 int SlipBIO::write( const char* buf, int num ) {
61 for( int i = 0; i < num; i++ ) {
62 if( ( buf[i] == ( char )0xc0 ) || ( buf[i] == ( char )0xDB ) ) {
67 int totalLen = num + badOnes + 1; // 2
68 char* targetPtr = ( char* ) malloc( totalLen );
74 std::shared_ptr<char> t = std::shared_ptr<char>( targetPtr, free );
77 //targetPtr[j++] = (char)0xC0;
79 for( int i = 0; i < num; i++ ) {
80 if( buf[i] == ( char )0xc0 ) {
81 targetPtr[j++] = ( char )0xDB;
82 targetPtr[j++] = ( char )0xDC;
83 } else if( buf[i] == ( char )0xDB ) {
84 targetPtr[j++] = ( char )0xDB;
85 targetPtr[j++] = ( char )0xDD;
87 targetPtr[j++] = buf[i];
91 targetPtr[j++] = ( char )0xC0;
97 int dlen = target->write( targetPtr + sent, std::min( 1024, j - sent ) );
100 throw "Error, target write failed";
101 } else if( dlen == 0 ) {
116 int SlipBIO::read( char* buf, int size ) {
117 // while we have no data to decode or unmasking does not yield a full package
118 while( !packageLeft && ( decodePos >= rawPos || !unmask() ) ) {
120 // we have no data, read more
121 if( buffer.size() - rawPos < 64 ) {
122 // not enough space... package is too big
127 int len = target->read( buffer.data() + rawPos, buffer.capacity() - rawPos );
140 int len = std::min( decodeTarget, ( unsigned int ) size );
141 // a package finished, return it
142 std::copy( buffer.data(), buffer.data() + len, buf );
143 // move the buffer contents back
144 std::copy( buffer.data() + len, buffer.data() + decodeTarget, buffer.data() );
147 if( decodeTarget == 0 ) {
154 long SlipBIO::ctrl( int cmod, long arg1, void* arg2 ) {
158 std::cout << "SLIP crtl: " << cmod << std::endl;
159 return target->ctrl( cmod, arg1, arg2 );
162 const char* SlipBIO::getName() {
166 bool SlipBIO::unmask() {
167 unsigned int j = decodeTarget;
169 for( unsigned int i = decodePos; i < rawPos; i++ ) {
170 if( buffer[i] == ( char ) 0xDB ) {
175 buffer[decodeTarget] = buffer[i - 1];
176 decodePos = decodeTarget;
177 rawPos = decodePos + 1;
178 return 0;// no packet
179 } else if( buffer[i] == ( char )0xdc ) {
180 buffer[j++] = ( char ) 0xc0;
181 } else if( buffer[i] == ( char )0xdd ) {
182 buffer[j++] = ( char ) 0xdb;
189 } else if( buffer[i] == ( char ) 0xc0 ) {
193 // copy rest to bufferfer i to len
201 buffer[j++] = buffer[i];