asdf

1 files changed, 63 insertions, 0 deletions

diff --git a/src/dns.h b/src/dns.h
index 5d8096e..8cba804 100644
--- a/src/dns.h
+++ b/src/dns.h
@@ -2,6 +2,69 @@
 
 #include <stdint.h>
 
+//TODO remove
+#include <stdio.h>
+
+struct dns_header;
+
+struct dns_question;
+
+struct dns_answer;
+
+/**
+ * DNS Message struct
+ * */
+struct dns_message;
+
+struct dns_header {
+	uint16_t id;
+
+	uint8_t QR;	//Query:0 Reply:1
+	uint8_t OPCODE;	//Query:0 Iquery:1 Status:2
+	uint8_t AA;	//Authorative answer
+	uint8_t TC;	//Truncation
+	uint8_t RD;	//Recursion Desired
+	uint8_t RA;	//Recursion Available
+	uint8_t Z;	//Unused
+	uint8_t RCODE;	//Response Code
+
+	uint16_t question_count;
+	uint16_t answer_count;
+	uint16_t authorative_count;
+	uint16_t additional_count;
+};
+
+struct dns_question {
+	char* qname;
+	uint16_t qtype;
+	uint16_t qclass;
+};
+
+struct dns_answer {
+	char* name; //in qname format
+	uint16_t type;
+	uint16_t class;
+	uint32_t ttl;
+	uint16_t rdlength;
+	char* rdata;
+};
+
+struct dns_message {
+	struct dns_header header;
+	
+	int qcount;
+	struct dns_question* question;
+
+	int acount;
+	struct dns_answer* answer;
+};
+
+/**
+ * Parse the packet in _buffer and populate the dns_message struct
+ * returns: 0 on success, !=0 on failure
+ * */
+int dns_parse_packet ( char* _buffer, int _bufflen, struct dns_message* _msg );
+
 /**
  * Convert a null terminated string containing a 
  * fqdn (eg server.example.com) to the binary format used by DNS records