/src/pdns/pdns/dnslabeltext.cc

Source

#line 1 "dnslabeltext.rl"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <string>
#include <string_view>
#include "dnsname.hh"
#include "namespaces.hh"
#include "dnswriter.hh"
#include "misc.hh"

namespace {
void appendSplit(vector<string>& ret, string& segment, char c)
{
  if(segment.size()>254) {
    ret.push_back(segment);
    segment.clear();
  }
  segment.append(1, c);
}

}

vector<string> segmentDNSText(const string& input )
{
  // cerr<<"segmentDNSText("<<input<<")"<<endl; 

#line 31 "dnslabeltext.cc"
static const char _dnstext_actions[] = {
  0, 1, 0, 1, 1, 1, 2, 1, 
  3, 1, 4, 1, 5, 2, 0, 1, 
  2, 4, 5
};

static const char _dnstext_key_offsets[] = {
  0, 0, 1, 3, 5, 7, 9, 11, 
  15
};

static const unsigned char _dnstext_trans_keys[] = {
  34u, 34u, 92u, 48u, 57u, 48u, 57u, 48u, 
  57u, 34u, 92u, 32u, 34u, 9u, 13u, 34u, 
  0
};

static const char _dnstext_single_lengths[] = {
  0, 1, 2, 0, 0, 0, 2, 2, 
  1
};

static const char _dnstext_range_lengths[] = {
  0, 0, 0, 1, 1, 1, 0, 1, 
  0
};

static const char _dnstext_index_offsets[] = {
  0, 0, 2, 5, 7, 9, 11, 14, 
  18
};

static const char _dnstext_trans_targs[] = {
  2, 0, 7, 3, 2, 4, 2, 5, 
  0, 6, 0, 7, 3, 2, 8, 2, 
  8, 0, 2, 0, 0
};

static const char _dnstext_trans_actions[] = {
  3, 0, 0, 0, 11, 7, 5, 7, 
  0, 7, 0, 9, 9, 16, 0, 13, 
  0, 0, 13, 0, 0
};

static const char _dnstext_eof_actions[] = {
  0, 0, 0, 0, 0, 0, 0, 1, 
  1
};

static const int dnstext_start = 1;
static const int dnstext_first_final = 7;
static const int dnstext_error = 0;

static const int dnstext_en_main = 1;


#line 31 "dnslabeltext.rl"

  (void)dnstext_error;  // silence warnings
  (void)dnstext_en_main;
        const char *p = input.c_str(), *pe = input.c_str() + input.length();
        const char* eof = pe;
        int cs;
        char val = 0;

        string segment;
        vector<string> ret;

        
#line 101 "dnslabeltext.cc"
  {
  cs = dnstext_start;
  }

#line 106 "dnslabeltext.cc"
  {
  int _klen;
  unsigned int _trans;
  const char *_acts;
  unsigned int _nacts;
  const unsigned char *_keys;

  if ( p == pe )
    goto _test_eof;
  if ( cs == 0 )
    goto _out;
_resume:
  _keys = _dnstext_trans_keys + _dnstext_key_offsets[cs];
  _trans = _dnstext_index_offsets[cs];

  _klen = _dnstext_single_lengths[cs];
  if ( _klen > 0 ) {
    const unsigned char *_lower = _keys;
    const unsigned char *_mid;
    const unsigned char *_upper = _keys + _klen - 1;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + ((_upper-_lower) >> 1);
      if ( (*p) < *_mid )
        _upper = _mid - 1;
      else if ( (*p) > *_mid )
        _lower = _mid + 1;
      else {
        _trans += (unsigned int)(_mid - _keys);
        goto _match;
      }
    }
    _keys += _klen;
    _trans += _klen;
  }

  _klen = _dnstext_range_lengths[cs];
  if ( _klen > 0 ) {
    const unsigned char *_lower = _keys;
    const unsigned char *_mid;
    const unsigned char *_upper = _keys + (_klen<<1) - 2;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + (((_upper-_lower) >> 1) & ~1);
      if ( (*p) < _mid[0] )
        _upper = _mid - 2;
      else if ( (*p) > _mid[1] )
        _lower = _mid + 2;
      else {
        _trans += (unsigned int)((_mid - _keys)>>1);
        goto _match;
      }
    }
    _trans += _klen;
  }

_match:
  cs = _dnstext_trans_targs[_trans];

  if ( _dnstext_trans_actions[_trans] == 0 )
    goto _again;

  _acts = _dnstext_actions + _dnstext_trans_actions[_trans];
  _nacts = (unsigned int) *_acts++;
  while ( _nacts-- > 0 )
  {
    switch ( *_acts++ )
    {
  case 0:
#line 43 "dnslabeltext.rl"
  { 
                        ret.push_back(segment);
                        segment.clear();
                }
  break;
  case 1:
#line 47 "dnslabeltext.rl"
  { 
                        segment.clear();
                }
  break;
  case 2:
#line 51 "dnslabeltext.rl"
  {
                  char c = *p;
                  appendSplit(ret, segment, c);
                }
  break;
  case 3:
#line 55 "dnslabeltext.rl"
  {
                  char c = *p;
                  val *= 10;
                  val += c-'0';
                  
                }
  break;
  case 4:
#line 61 "dnslabeltext.rl"
  {
                  appendSplit(ret, segment, val);
                  val=0;
                }
  break;
  case 5:
#line 66 "dnslabeltext.rl"
  {
                  appendSplit(ret, segment, *(p));
                }
  break;
#line 221 "dnslabeltext.cc"
    }
  }

_again:
  if ( cs == 0 )
    goto _out;
  if ( ++p != pe )
    goto _resume;
  _test_eof: {}
  if ( p == eof )
  {
  const char *__acts = _dnstext_actions + _dnstext_eof_actions[cs];
  unsigned int __nacts = (unsigned int) *__acts++;
  while ( __nacts-- > 0 ) {
    switch ( *__acts++ ) {
  case 0:
#line 43 "dnslabeltext.rl"
  { 
                        ret.push_back(segment);
                        segment.clear();
                }
  break;
#line 244 "dnslabeltext.cc"
    }
  }
  }

  _out: {}
  }

#line 79 "dnslabeltext.rl"


        if ( cs < dnstext_first_final ) {
                throw runtime_error("Unable to parse DNS TXT '"+input+"'");
        }

        return ret;
};


DNSName::string_t segmentDNSNameRaw(const char* realinput, size_t inputlen)
{

#line 266 "dnslabeltext.cc"
static const char _dnsnameraw_actions[] = {
  0, 1, 0, 1, 1, 1, 2, 1, 
  3, 1, 4, 1, 5, 2, 1, 5, 
  2, 4, 0, 2, 4, 5
};

static const char _dnsnameraw_key_offsets[] = {
  0, 0, 2, 4, 6, 8, 10, 12
};

static const unsigned char _dnsnameraw_trans_keys[] = {
  46u, 92u, 48u, 57u, 48u, 57u, 48u, 57u, 
  46u, 92u, 46u, 92u, 46u, 92u, 0
};

static const char _dnsnameraw_single_lengths[] = {
  0, 2, 0, 0, 0, 2, 2, 2
};

static const char _dnsnameraw_range_lengths[] = {
  0, 0, 1, 1, 1, 0, 0, 0
};

static const char _dnsnameraw_index_offsets[] = {
  0, 0, 3, 5, 7, 9, 12, 15
};

static const char _dnsnameraw_trans_targs[] = {
  0, 2, 5, 3, 5, 4, 0, 7, 
  0, 6, 2, 5, 0, 2, 5, 6, 
  2, 5, 0
};

static const char _dnsnameraw_trans_actions[] = {
  0, 3, 13, 7, 5, 7, 0, 7, 
  0, 1, 0, 11, 0, 3, 13, 16, 
  9, 19, 0
};

static const char _dnsnameraw_eof_actions[] = {
  0, 0, 0, 0, 0, 1, 0, 16
};

static const int dnsnameraw_start = 1;
static const int dnsnameraw_first_final = 5;
static const int dnsnameraw_error = 0;

static const int dnsnameraw_en_main = 1;


#line 95 "dnslabeltext.rl"

  (void)dnsnameraw_error;  // silence warnings
  (void)dnsnameraw_en_main;

        DNSName::string_t ret;

        if(!*realinput || *realinput == '.') {
          ret.append(1, (char)0);
          return ret;
        }

        ret.reserve(inputlen+1);

        const char *p = realinput, *pe = realinput + inputlen;
        const char* eof = pe;
        int cs;
        char val = 0;
        unsigned char labellen=0;
        unsigned int lenpos=0;
        
#line 338 "dnslabeltext.cc"
  {
  cs = dnsnameraw_start;
  }

#line 343 "dnslabeltext.cc"
  {
  int _klen;
  unsigned int _trans;
  const char *_acts;
  unsigned int _nacts;
  const unsigned char *_keys;

  if ( p == pe )
    goto _test_eof;
  if ( cs == 0 )
    goto _out;
_resume:
  _keys = _dnsnameraw_trans_keys + _dnsnameraw_key_offsets[cs];
  _trans = _dnsnameraw_index_offsets[cs];

  _klen = _dnsnameraw_single_lengths[cs];
  if ( _klen > 0 ) {
    const unsigned char *_lower = _keys;
    const unsigned char *_mid;
    const unsigned char *_upper = _keys + _klen - 1;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + ((_upper-_lower) >> 1);
      if ( (*p) < *_mid )
        _upper = _mid - 1;
      else if ( (*p) > *_mid )
        _lower = _mid + 1;
      else {
        _trans += (unsigned int)(_mid - _keys);
        goto _match;
      }
    }
    _keys += _klen;
    _trans += _klen;
  }

  _klen = _dnsnameraw_range_lengths[cs];
  if ( _klen > 0 ) {
    const unsigned char *_lower = _keys;
    const unsigned char *_mid;
    const unsigned char *_upper = _keys + (_klen<<1) - 2;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + (((_upper-_lower) >> 1) & ~1);
      if ( (*p) < _mid[0] )
        _upper = _mid - 2;
      else if ( (*p) > _mid[1] )
        _lower = _mid + 2;
      else {
        _trans += (unsigned int)((_mid - _keys)>>1);
        goto _match;
      }
    }
    _trans += _klen;
  }

_match:
  cs = _dnsnameraw_trans_targs[_trans];

  if ( _dnsnameraw_trans_actions[_trans] == 0 )
    goto _again;

  _acts = _dnsnameraw_actions + _dnsnameraw_trans_actions[_trans];
  _nacts = (unsigned int) *_acts++;
  while ( _nacts-- > 0 )
  {
    switch ( *_acts++ )
    {
  case 0:
#line 115 "dnslabeltext.rl"
  { 
                        if (labellen > 63) {
                          throw runtime_error("Unable to parse DNS name '"+string(realinput)+"': invalid label length "+std::to_string(labellen));
                        }
                        ret[lenpos]=labellen;
                        labellen=0;
                }
  break;
  case 1:
#line 122 "dnslabeltext.rl"
  { 
                        lenpos=ret.size();
                        ret.append(1, (char)0);
                        labellen=0;
                }
  break;
  case 2:
#line 128 "dnslabeltext.rl"
  {
                  char c = *p;
                  ret.append(1, c);
                  labellen++;
                }
  break;
  case 3:
#line 133 "dnslabeltext.rl"
  {
                  char c = *p;
                  val *= 10;
                  val += c-'0';
                }
  break;
  case 4:
#line 138 "dnslabeltext.rl"
  {
                  ret.append(1, val);
                  labellen++;
                  val=0;
                }
  break;
  case 5:
#line 144 "dnslabeltext.rl"
  {
                  ret.append(1, *(p));
                  labellen++;
                }
  break;
#line 465 "dnslabeltext.cc"
    }
  }

_again:
  if ( cs == 0 )
    goto _out;
  if ( ++p != pe )
    goto _resume;
  _test_eof: {}
  if ( p == eof )
  {
  const char *__acts = _dnsnameraw_actions + _dnsnameraw_eof_actions[cs];
  unsigned int __nacts = (unsigned int) *__acts++;
  while ( __nacts-- > 0 ) {
    switch ( *__acts++ ) {
  case 0:
#line 115 "dnslabeltext.rl"
  { 
                        if (labellen > 63) {
                          throw runtime_error("Unable to parse DNS name '"+string(realinput)+"': invalid label length "+std::to_string(labellen));
                        }
                        ret[lenpos]=labellen;
                        labellen=0;
                }
  break;
  case 4:
#line 138 "dnslabeltext.rl"
  {
                  ret.append(1, val);
                  labellen++;
                  val=0;
                }
  break;
#line 499 "dnslabeltext.cc"
    }
  }
  }

  _out: {}
  }

#line 165 "dnslabeltext.rl"


        if ( cs < dnsnameraw_first_final ) {
                throw runtime_error("Unable to parse DNS name '"+string(realinput)+"': cs="+std::to_string(cs));
        }
        ret.append(1, (char)0);
        return ret;
};

// Reads an RFC 1035 character string from 'in', puts the resulting bytes in 'out'.
// Returns the amount of bytes read from 'in'
size_t parseRFC1035CharString(std::string_view in, std::string &val) {

  val.clear();
  val.reserve(in.size());
  const char *p = in.data();
  const char *pe = p + in.size();
  int cs = 0;
  uint8_t escaped_octet = 0;
  // Keeps track of how many chars we read from the source string
  size_t counter=0;

/* This parses an RFC 1035 char-string.
 * It was created from the ABNF in draft-ietf-dnsop-svcb-https-02 with
 * https://github.com/zinid/abnfc and modified to put all the characters in the
 * right place.
 */

#line 536 "dnslabeltext.cc"
static const char _dns_text_to_string_actions[] = {
  0, 1, 0, 1, 2, 1, 3, 2, 
  0, 1
};

static const char _dns_text_to_string_key_offsets[] = {
  0, 0, 8, 15, 17, 19, 22, 24, 
  33, 41, 43, 45, 48, 50, 58
};

static const char _dns_text_to_string_trans_keys[] = {
  34, 92, 33, 39, 42, 58, 60, 126, 
  50, 33, 47, 48, 49, 58, 126, 48, 
  57, 48, 57, 53, 48, 52, 48, 53, 
  9, 34, 92, 32, 39, 42, 58, 60, 
  126, 9, 50, 32, 47, 48, 49, 58, 
  126, 48, 57, 48, 57, 53, 48, 52, 
  48, 53, 33, 92, 35, 39, 42, 58, 
  60, 126, 0
};

static const char _dns_text_to_string_single_lengths[] = {
  0, 2, 1, 0, 0, 1, 0, 3, 
  2, 0, 0, 1, 0, 2, 0
};

static const char _dns_text_to_string_range_lengths[] = {
  0, 3, 3, 1, 1, 1, 1, 3, 
  3, 1, 1, 1, 1, 3, 0
};

static const char _dns_text_to_string_index_offsets[] = {
  0, 0, 6, 11, 13, 15, 18, 20, 
  27, 33, 35, 37, 40, 42, 48
};

static const char _dns_text_to_string_indicies[] = {
  2, 3, 0, 0, 0, 1, 5, 0, 
  4, 0, 1, 6, 1, 7, 1, 8, 
  6, 1, 7, 1, 9, 10, 11, 9, 
  9, 9, 1, 9, 13, 9, 12, 9, 
  1, 14, 1, 15, 1, 16, 14, 1, 
  15, 1, 0, 3, 0, 0, 0, 1, 
  1, 0
};

static const char _dns_text_to_string_trans_targs[] = {
  13, 0, 7, 2, 3, 5, 4, 13, 
  6, 7, 14, 8, 9, 11, 10, 7, 
  12
};

static const char _dns_text_to_string_trans_actions[] = {
  3, 0, 5, 5, 1, 1, 1, 7, 
  1, 3, 5, 5, 1, 1, 1, 7, 
  1
};

static const int dns_text_to_string_start = 1;
static const int dns_text_to_string_first_final = 13;
static const int dns_text_to_string_error = 0;

static const int dns_text_to_string_en_main = 1;


#line 602 "dnslabeltext.cc"
  {
  cs = dns_text_to_string_start;
  }

#line 233 "dnslabeltext.rl"


  // silence warnings
  (void) dns_text_to_string_first_final;
  (void) dns_text_to_string_error;
  (void) dns_text_to_string_en_main;
  
#line 615 "dnslabeltext.cc"
  {
  int _klen;
  unsigned int _trans;
  const char *_acts;
  unsigned int _nacts;
  const char *_keys;

  if ( p == pe )
    goto _test_eof;
  if ( cs == 0 )
    goto _out;
_resume:
  _keys = _dns_text_to_string_trans_keys + _dns_text_to_string_key_offsets[cs];
  _trans = _dns_text_to_string_index_offsets[cs];

  _klen = _dns_text_to_string_single_lengths[cs];
  if ( _klen > 0 ) {
    const char *_lower = _keys;
    const char *_mid;
    const char *_upper = _keys + _klen - 1;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + ((_upper-_lower) >> 1);
      if ( (*p) < *_mid )
        _upper = _mid - 1;
      else if ( (*p) > *_mid )
        _lower = _mid + 1;
      else {
        _trans += (unsigned int)(_mid - _keys);
        goto _match;
      }
    }
    _keys += _klen;
    _trans += _klen;
  }

  _klen = _dns_text_to_string_range_lengths[cs];
  if ( _klen > 0 ) {
    const char *_lower = _keys;
    const char *_mid;
    const char *_upper = _keys + (_klen<<1) - 2;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + (((_upper-_lower) >> 1) & ~1);
      if ( (*p) < _mid[0] )
        _upper = _mid - 2;
      else if ( (*p) > _mid[1] )
        _lower = _mid + 2;
      else {
        _trans += (unsigned int)((_mid - _keys)>>1);
        goto _match;
      }
    }
    _trans += _klen;
  }

_match:
  _trans = _dns_text_to_string_indicies[_trans];
  cs = _dns_text_to_string_trans_targs[_trans];

  if ( _dns_text_to_string_trans_actions[_trans] == 0 )
    goto _again;

  _acts = _dns_text_to_string_actions + _dns_text_to_string_trans_actions[_trans];
  _nacts = (unsigned int) *_acts++;
  while ( _nacts-- > 0 )
  {
    switch ( *_acts++ )
    {
  case 0:
#line 195 "dnslabeltext.rl"
  {
    escaped_octet *= 10;
    escaped_octet += (*p)-'0';
    counter++;
  }
  break;
  case 1:
#line 201 "dnslabeltext.rl"
  {
    val += escaped_octet;
    escaped_octet = 0;
  }
  break;
  case 2:
#line 206 "dnslabeltext.rl"
  {
    val += (*p);
    counter++;
  }
  break;
  case 3:
#line 211 "dnslabeltext.rl"
  {
    counter++;
  }
  break;
#line 717 "dnslabeltext.cc"
    }
  }

_again:
  if ( cs == 0 )
    goto _out;
  if ( ++p != pe )
    goto _resume;
  _test_eof: {}
  _out: {}
  }

#line 240 "dnslabeltext.rl"

  return counter;
}

// Similar to above, but allows ( ) ; within quoted parts.
size_t parseRFC1035CharStringRelaxed(std::string_view in, std::string &val) {

  val.clear();
  val.reserve(in.size());
  const char *p = in.data();
  const char *pe = p + in.size();
  int cs = 0;
  uint8_t escaped_octet = 0;
  // Keeps track of how many chars we read from the source string
  size_t counter=0;

/* This parses an RFC 1035 char-string, but allows ( ) and ; to occur in
 * quoted parts.
 */

#line 751 "dnslabeltext.cc"
static const char _dns_text_to_string_r_actions[] = {
  0, 1, 0, 1, 2, 1, 3, 2, 
  0, 1
};

static const char _dns_text_to_string_r_key_offsets[] = {
  0, 0, 8, 15, 17, 19, 22, 24, 
  29, 37, 39, 41, 44, 46, 54
};

static const char _dns_text_to_string_r_trans_keys[] = {
  34, 92, 33, 39, 42, 58, 60, 126, 
  50, 33, 47, 48, 49, 58, 126, 48, 
  57, 48, 57, 53, 48, 52, 48, 53, 
  9, 34, 92, 32, 126, 9, 50, 32, 
  47, 48, 49, 58, 126, 48, 57, 48, 
  57, 53, 48, 52, 48, 53, 33, 92, 
  35, 39, 42, 58, 60, 126, 0
};

static const char _dns_text_to_string_r_single_lengths[] = {
  0, 2, 1, 0, 0, 1, 0, 3, 
  2, 0, 0, 1, 0, 2, 0
};

static const char _dns_text_to_string_r_range_lengths[] = {
  0, 3, 3, 1, 1, 1, 1, 1, 
  3, 1, 1, 1, 1, 3, 0
};

static const char _dns_text_to_string_r_index_offsets[] = {
  0, 0, 6, 11, 13, 15, 18, 20, 
  25, 31, 33, 35, 38, 40, 46
};

static const char _dns_text_to_string_r_indicies[] = {
  2, 3, 0, 0, 0, 1, 5, 0, 
  4, 0, 1, 6, 1, 7, 1, 8, 
  6, 1, 7, 1, 9, 10, 11, 9, 
  1, 9, 13, 9, 12, 9, 1, 14, 
  1, 15, 1, 16, 14, 1, 15, 1, 
  0, 3, 0, 0, 0, 1, 1, 0
};

static const char _dns_text_to_string_r_trans_targs[] = {
  13, 0, 7, 2, 3, 5, 4, 13, 
  6, 7, 14, 8, 9, 11, 10, 7, 
  12
};

static const char _dns_text_to_string_r_trans_actions[] = {
  3, 0, 5, 5, 1, 1, 1, 7, 
  1, 3, 5, 5, 1, 1, 1, 7, 
  1
};

static const int dns_text_to_string_r_start = 1;
static const int dns_text_to_string_r_first_final = 13;
static const int dns_text_to_string_r_error = 0;

static const int dns_text_to_string_r_en_main = 1;


#line 815 "dnslabeltext.cc"
  {
  cs = dns_text_to_string_r_start;
  }

#line 303 "dnslabeltext.rl"


  // silence warnings
  (void) dns_text_to_string_r_first_final;
  (void) dns_text_to_string_r_error;
  (void) dns_text_to_string_r_en_main;
  
#line 828 "dnslabeltext.cc"
  {
  int _klen;
  unsigned int _trans;
  const char *_acts;
  unsigned int _nacts;
  const char *_keys;

  if ( p == pe )
    goto _test_eof;
  if ( cs == 0 )
    goto _out;
_resume:
  _keys = _dns_text_to_string_r_trans_keys + _dns_text_to_string_r_key_offsets[cs];
  _trans = _dns_text_to_string_r_index_offsets[cs];

  _klen = _dns_text_to_string_r_single_lengths[cs];
  if ( _klen > 0 ) {
    const char *_lower = _keys;
    const char *_mid;
    const char *_upper = _keys + _klen - 1;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + ((_upper-_lower) >> 1);
      if ( (*p) < *_mid )
        _upper = _mid - 1;
      else if ( (*p) > *_mid )
        _lower = _mid + 1;
      else {
        _trans += (unsigned int)(_mid - _keys);
        goto _match;
      }
    }
    _keys += _klen;
    _trans += _klen;
  }

  _klen = _dns_text_to_string_r_range_lengths[cs];
  if ( _klen > 0 ) {
    const char *_lower = _keys;
    const char *_mid;
    const char *_upper = _keys + (_klen<<1) - 2;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + (((_upper-_lower) >> 1) & ~1);
      if ( (*p) < _mid[0] )
        _upper = _mid - 2;
      else if ( (*p) > _mid[1] )
        _lower = _mid + 2;
      else {
        _trans += (unsigned int)((_mid - _keys)>>1);
        goto _match;
      }
    }
    _trans += _klen;
  }

_match:
  _trans = _dns_text_to_string_r_indicies[_trans];
  cs = _dns_text_to_string_r_trans_targs[_trans];

  if ( _dns_text_to_string_r_trans_actions[_trans] == 0 )
    goto _again;

  _acts = _dns_text_to_string_r_actions + _dns_text_to_string_r_trans_actions[_trans];
  _nacts = (unsigned int) *_acts++;
  while ( _nacts-- > 0 )
  {
    switch ( *_acts++ )
    {
  case 0:
#line 262 "dnslabeltext.rl"
  {
    escaped_octet *= 10;
    escaped_octet += (*p)-'0';
    counter++;
  }
  break;
  case 1:
#line 268 "dnslabeltext.rl"
  {
    val += escaped_octet;
    escaped_octet = 0;
  }
  break;
  case 2:
#line 273 "dnslabeltext.rl"
  {
    val += (*p);
    counter++;
  }
  break;
  case 3:
#line 278 "dnslabeltext.rl"
  {
    counter++;
  }
  break;
#line 930 "dnslabeltext.cc"
    }
  }

_again:
  if ( cs == 0 )
    goto _out;
  if ( ++p != pe )
    goto _resume;
  _test_eof: {}
  _out: {}
  }

#line 310 "dnslabeltext.rl"

  return counter;
}

size_t parseSVCBValueListFromParsedRFC1035CharString(const std::string &in, std::vector<std::string> &val) {
  val.clear();
  const char *p = in.c_str();
  const char *pe = p + in.size();
  int cs = 0;
  const char* eof = pe;
  // Keeps track of how many chars we read from the source string
  size_t counter=0;

  // Here we store the parsed value until we hit a comma or are done
  std::string tmp;


#line 961 "dnslabeltext.cc"
static const char _dns_text_to_value_list_actions[] = {
  0, 1, 0, 1, 2, 1, 3, 2, 
  2, 3, 2, 3, 1
};

static const char _dns_text_to_value_list_key_offsets[] = {
  0, 0, 2, 4, 6
};

static const unsigned char _dns_text_to_value_list_trans_keys[] = {
  44u, 92u, 44u, 92u, 44u, 92u, 44u, 92u, 
  0
};

static const char _dns_text_to_value_list_single_lengths[] = {
  0, 2, 2, 2, 2
};

static const char _dns_text_to_value_list_range_lengths[] = {
  0, 0, 0, 0, 0
};

static const char _dns_text_to_value_list_index_offsets[] = {
  0, 0, 3, 6, 9
};

static const char _dns_text_to_value_list_indicies[] = {
  1, 2, 0, 3, 3, 1, 1, 2, 
  0, 4, 2, 0, 0
};

static const char _dns_text_to_value_list_trans_targs[] = {
  4, 0, 2, 4, 1
};

static const char _dns_text_to_value_list_trans_actions[] = {
  1, 0, 5, 10, 7
};

static const char _dns_text_to_value_list_eof_actions[] = {
  0, 0, 0, 0, 3
};

static const int dns_text_to_value_list_start = 3;
static const int dns_text_to_value_list_first_final = 3;
static const int dns_text_to_value_list_error = 0;

static const int dns_text_to_value_list_en_main = 3;


#line 1012 "dnslabeltext.cc"
  {
  cs = dns_text_to_value_list_start;
  }

#line 359 "dnslabeltext.rl"


  // silence warnings
  (void) dns_text_to_value_list_first_final;
  (void) dns_text_to_value_list_error;
  (void) dns_text_to_value_list_en_main;
  
#line 1025 "dnslabeltext.cc"
  {
  int _klen;
  unsigned int _trans;
  const char *_acts;
  unsigned int _nacts;
  const unsigned char *_keys;

  if ( p == pe )
    goto _test_eof;
  if ( cs == 0 )
    goto _out;
_resume:
  _keys = _dns_text_to_value_list_trans_keys + _dns_text_to_value_list_key_offsets[cs];
  _trans = _dns_text_to_value_list_index_offsets[cs];

  _klen = _dns_text_to_value_list_single_lengths[cs];
  if ( _klen > 0 ) {
    const unsigned char *_lower = _keys;
    const unsigned char *_mid;
    const unsigned char *_upper = _keys + _klen - 1;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + ((_upper-_lower) >> 1);
      if ( (*p) < *_mid )
        _upper = _mid - 1;
      else if ( (*p) > *_mid )
        _lower = _mid + 1;
      else {
        _trans += (unsigned int)(_mid - _keys);
        goto _match;
      }
    }
    _keys += _klen;
    _trans += _klen;
  }

  _klen = _dns_text_to_value_list_range_lengths[cs];
  if ( _klen > 0 ) {
    const unsigned char *_lower = _keys;
    const unsigned char *_mid;
    const unsigned char *_upper = _keys + (_klen<<1) - 2;
    while (1) {
      if ( _upper < _lower )
        break;

      _mid = _lower + (((_upper-_lower) >> 1) & ~1);
      if ( (*p) < _mid[0] )
        _upper = _mid - 2;
      else if ( (*p) > _mid[1] )
        _lower = _mid + 2;
      else {
        _trans += (unsigned int)((_mid - _keys)>>1);
        goto _match;
      }
    }
    _trans += _klen;
  }

_match:
  _trans = _dns_text_to_value_list_indicies[_trans];
  cs = _dns_text_to_value_list_trans_targs[_trans];

  if ( _dns_text_to_value_list_trans_actions[_trans] == 0 )
    goto _again;

  _acts = _dns_text_to_value_list_actions + _dns_text_to_value_list_trans_actions[_trans];
  _nacts = (unsigned int) *_acts++;
  while ( _nacts-- > 0 )
  {
    switch ( *_acts++ )
    {
  case 0:
#line 330 "dnslabeltext.rl"
  {
    tmp += (*p);
    counter++;
  }
  break;
  case 1:
#line 335 "dnslabeltext.rl"
  {
    tmp += (*p);
  }
  break;
  case 2:
#line 339 "dnslabeltext.rl"
  {
    val.push_back(tmp);
    tmp.clear();
    counter++;
  }
  break;
  case 3:
#line 345 "dnslabeltext.rl"
  {
    counter++;
  }
  break;
#line 1126 "dnslabeltext.cc"
    }
  }

_again:
  if ( cs == 0 )
    goto _out;
  if ( ++p != pe )
    goto _resume;
  _test_eof: {}
  if ( p == eof )
  {
  const char *__acts = _dns_text_to_value_list_actions + _dns_text_to_value_list_eof_actions[cs];
  unsigned int __nacts = (unsigned int) *__acts++;
  while ( __nacts-- > 0 ) {
    switch ( *__acts++ ) {
  case 2:
#line 339 "dnslabeltext.rl"
  {
    val.push_back(tmp);
    tmp.clear();
    counter++;
  }
  break;
#line 1150 "dnslabeltext.cc"
    }
  }
  }

  _out: {}
  }

#line 366 "dnslabeltext.rl"

  if ( cs < dns_text_to_value_list_first_final ) {
          throw runtime_error("Unable to parse DNS SVCB value list '"+in+"'");
  }

  return counter;
}


#if 0
int main()
{
  //char blah[]="\"blah\" \"bleh\" \"bloeh\\\"bleh\" \"\\97enzo\"";
  char blah[]="\"v=spf1 ip4:67.106.74.128/25 ip4:63.138.42.224/28 ip4:65.204.46.224/27 \\013\\010ip4:66.104.217.176/28 \\013\\010ip4:209.48.147.0/27 ~all\"";
  //char blah[]="\"abc \\097\\098 def\"";
  printf("Input: '%s'\n", blah);
  vector<string> res=dnstext(blah);
  cerr<<res.size()<<" segments"<<endl;
  cerr<<res[0]<<endl;
}
#endif

Coverage Report

Created: 2026-10-16 07:03