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Exporting SerializeName for usage in RR data

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This commit is contained in:
Fabian Stamm
2018-05-13 22:27:16 +02:00
parent 8c66f9a41b
commit e5c55b402b
5 changed files with 51 additions and 50 deletions
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48
src/request.ts
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@ -165,6 +165,28 @@ function parseQuestions(count: number, packet: Buffer): MessageQuestion[] {
}).parse(packet).questions;
}
export function SerializeName(name: string) {
let length = 0;
let parts = name.split(".");
parts.forEach(e => {
// Length of part and byte that holds the length information
if (e.length > MAX_LABEL_SIZE) throw new Error("Label to large");
length += e.length + 1;
})
length += 1; //Adding last 0 length octet
let data = Buffer.alloc(length);
let offset = 0;
parts.forEach(e => {
data.writeUInt8(e.length, offset)
offset++
data.write(e, offset, e.length)
offset += e.length
})
data.writeUInt8(0, offset);
return data;
}
export class Request implements Message {
_header: MessageHeader;
get header() {
@ -280,7 +302,7 @@ export class Request implements Message {
}
private serializeQuestion(question: MessageQuestion) {
let qname = this.serializeName(question.QNAME);
let qname = SerializeName(question.QNAME);
let data = Buffer.alloc(qname.length + 4);
qname.copy(data, 0, 0, qname.length);
let offset = qname.length;
@ -292,7 +314,7 @@ export class Request implements Message {
private serializeResourceRecord(record: MessageRecourceRecord) {
// TODO: Implement compression
let name = this.serializeName(record.NAME);
let name = SerializeName(record.NAME);
let data = Buffer.alloc(name.length + 10 + record.RDLENGTH) // For TYPE, CLASS, TTL, RLENGTH
name.copy(data, 0, 0, name.length);
let offset = name.length;
@ -307,28 +329,6 @@ export class Request implements Message {
record.RDATA.copy(data, offset, 0, record.RDLENGTH)
return data;
}
private serializeName(name: string) {
let length = 0;
let parts = name.split(".");
parts.forEach(e => {
// Length of part and byte that holds the length information
if (e.length > MAX_LABEL_SIZE) throw new Error("Label to large");
length += e.length + 1;
})
length += 1; //Adding last 0 length octet
let data = Buffer.alloc(length);
let offset = 0;
parts.forEach(e => {
data.writeUInt8(e.length, offset)
offset++
data.write(e, offset, e.length)
offset += e.length
})
data.writeUInt8(0, offset);
return data;
}
}
export class RecourceRecord implements MessageRecourceRecord {