/// <summary>
/// Parses resource record from reply data.
/// </summary>
/// <param name="name">DNS domain name that owns a resource record.</param>
/// <param name="reply">DNS server reply data.</param>
/// <param name="offset">Current offset in reply data.</param>
/// <param name="rdLength">Resource record data length.</param>
/// <param name="ttl">Time to live in seconds.</param>
public static DnsRecord_HINFO Parse(string name, byte[] reply, ref int offset, int rdLength, int ttl)
{
/* RFC 1035 3.3.2. HINFO RDATA format
*
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* / CPU /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
* / OS /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
*
* CPU A <character-string> which specifies the CPU type.
*
* OS A <character-string> which specifies the operating
* system type.
*
* Standard values for CPU and OS can be found in [RFC-1010].
*
*/
// CPU
string cpu = DnsTool.ReadCharacterString(reply, ref offset);
// OS
string os = DnsTool.ReadCharacterString(reply, ref offset);
return(new DnsRecord_HINFO(name, cpu, os, ttl));
}
/// <summary>
/// Parses resource record from reply data.
/// </summary>
/// <param name="name">DNS domain name that owns a resource record.</param>
/// <param name="reply">DNS server reply data.</param>
/// <param name="offset">Current offset in reply data.</param>
/// <param name="rdLength">Resource record data length.</param>
/// <param name="ttl">Time to live in seconds.</param>
public static DnsRecord_SPF Parse(string name, byte[] reply, ref int offset, int rdLength, int ttl)
{
// SPF RR
string text = DnsTool.ReadCharacterString(reply, ref offset);
return(new DnsRecord_SPF(name, text, ttl));
}
/// <summary>
/// Parses resource record from reply data.
/// </summary>
/// <param name="name">DNS domain name that owns a resource record.</param>
/// <param name="reply">DNS server reply data.</param>
/// <param name="offset">Current offset in reply data.</param>
/// <param name="rdLength">Resource record data length.</param>
/// <param name="ttl">Time to live in seconds.</param>
public static DnsRecord_NAPTR Parse(string name, byte[] reply, ref int offset, int rdLength, int ttl)
{
/* RFC 3403.
* The packet format for the NAPTR record is as follows
* 1 1 1 1 1 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ORDER |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| PREFERENCE |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| / FLAGS /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| / SERVICES /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| / REGEXP /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| / REPLACEMENT /
| / /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
*/
int order = reply[offset++] << 8 | reply[offset++];
int preference = reply[offset++] << 8 | reply[offset++];
string flags = DnsTool.ReadCharacterString(reply, ref offset);
string services = DnsTool.ReadCharacterString(reply, ref offset);
string regexp = DnsTool.ReadCharacterString(reply, ref offset);
string replacement = "";
DnsTool.GetQName(reply, ref offset, ref replacement);
return(new DnsRecord_NAPTR(name, order, preference, flags, services, regexp, replacement, ttl));
}