mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-16 08:11:31 +00:00
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
// dns_resolver.h - #define statements for the DNS resolver
|
|
|
|
// We only need A and CNAME queries (later possibly AAAA/A6?)
|
|
#define QUERYTYPE_A 1
|
|
#define QUERYTYPE_CNAME 5
|
|
|
|
// We only query with INTERNET class (not CHAOS or whatever)
|
|
#define QUERYCLASS_INET 1
|
|
|
|
// Our first query will have the identifier <1> (arbitrary -
|
|
// remember however that (256 - QUERYIDENTIFIER)/2 > MAX_CNAME_RECURSION !!!
|
|
#define QUERYIDENTIFIER 1
|
|
|
|
// Query flags are standard values here
|
|
#define QUERYFLAGS 0x0100
|
|
#define QUERYFLAGS_MASK 0xf8
|
|
#define QUERYFLAGS_WANT 0x80
|
|
|
|
// Indices inside the byte array that holds DNS queries/answers
|
|
#define QINDEX_ID 0
|
|
#define QINDEX_FLAGS 2
|
|
#define QINDEX_NUMQUEST 4
|
|
#define QINDEX_NUMANSW 6
|
|
#define QINDEX_NUMAUTH 8
|
|
#define QINDEX_NUMADDIT 10
|
|
#define QINDEX_QUESTION 12
|
|
#define QINDEX_QTYPE 14
|
|
#define QINDEX_QCLASS 16
|
|
#define QINDEX_STORE_A 256
|
|
|
|
// Constant UDP port number for DNS traffic
|
|
#define UDP_PORT_DNS 53
|
|
|
|
// Return values that the package parser may give
|
|
// This packet was not for us (broadcast or whatever)
|
|
#define RET_PACK_GARBAG 0
|
|
// Retrieved an address - query finishes
|
|
#define RET_GOT_ADDR 1
|
|
// No A record for that hostname - try running a CNAME query
|
|
#define RET_RUN_CNAME_Q 2
|
|
// The CNAME query returned a valid hostname - run A query on that
|
|
#define RET_RUN_NEXT_A 3
|
|
// The CNAME query failed - stop resolving
|
|
#define RET_CNAME_FAIL 4
|
|
// We have a reliable input that claims that the hostname does not exist
|
|
#define RET_NOSUCHNAME 5
|
|
// The name server response is somehow bogus/can not be parsed -> Abort
|
|
#define RET_DNSERROR 6
|
|
|
|
// Return values that the query engine may give
|
|
// DNS query succeeded, IP address delivered
|
|
#define RET_DNS_OK 0
|
|
// DNS query failed
|
|
#define RET_DNS_FAIL 1
|
|
|
|
// Error codes the DNS server can send to us
|
|
#define ERR_NOSUCHNAME 3
|
|
|