35 lines
930 B
OCaml
35 lines
930 B
OCaml
open Types
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open Utils
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let header_to_bytes header =
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new_buffer
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header
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[ header.id
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; header.flags
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; header.num_questions
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; header.num_answers
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; header.num_authorities
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; header.num_additionals
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]
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;;
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let question_to_bytes question =
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let buffer1 = new_buffer question [ question.type_; question.class_ ] in
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let buffer2 = Buffer.create (Bytes.length question.name + Bytes.length buffer1) in
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Buffer.add_bytes buffer2 question.name;
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Buffer.add_bytes buffer2 buffer1;
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buffer2
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;;
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let encode_dns_name domain_name =
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let parts = String.split_on_char '.' domain_name in
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let encoded_parts =
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List.map
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(fun part ->
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let len_part = String.length part in
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let len_byte = Char.chr len_part in
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Bytes.cat (Bytes.of_string (String.make 1 len_byte)) (Bytes.of_string part))
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parts
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in
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Bytes.cat (Bytes.concat Bytes.empty encoded_parts) (Bytes.of_string "\x00")
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;;
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