Data Structures
Here are the data structures with brief descriptions:
 C_extDnsCacheStatsObject used by ext_dns_cache_stats to report current cache stats on a particular context
 C_extDnsHeaderHeader information for each DNS message
 C_extDnsMessageData type that represents a single DNS message
 C_extDnsQuestionRepresents a question inside the question section
 C_extDnsResourceRecordPublic structure that defines a single resource record