52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
#ifndef PROTO_DNS_PARSE_H
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#define PROTO_DNS_PARSE_H
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struct DomainPointer
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{
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const unsigned char *name;
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unsigned length;
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};
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struct DNS_Incoming
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{
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unsigned id; /* transaction id */
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unsigned is_valid:1;
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unsigned is_formerr:1;
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unsigned is_edns0:1;/* edns0 features found */
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unsigned qr:1; /* 'query' or 'response' */
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unsigned aa:1; /* 'authoritative answer' */
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unsigned tc:1; /* 'truncation' */
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unsigned rd:1; /* 'recursion desired' */
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unsigned ra:1; /* 'recursion available' */
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unsigned z:3; /* reserved */
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unsigned opcode;
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unsigned rcode; /* response error code */
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unsigned qdcount; /* query count */
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unsigned ancount; /* answer count */
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unsigned nscount; /* name-server/authority count */
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unsigned arcount; /* additional record count */
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struct {
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unsigned payload_size;
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unsigned version;
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unsigned z;
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} edns0;
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const unsigned char *req;
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unsigned req_length;
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/* the query name */
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struct DomainPointer query_name;
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unsigned query_type;
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unsigned char query_name_buffer[256];
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unsigned rr_count;
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unsigned short rr_offset[1024];
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unsigned edns0_offset;
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};
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void
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proto_dns_parse(struct DNS_Incoming *dns, const unsigned char px[], unsigned offset, unsigned max);
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unsigned
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dns_name_skip(const unsigned char px[], unsigned offset, unsigned max);
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#endif
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