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define types for basic A query
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src/root.zig
+60
src/root.zig
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const std = @import("std");
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const assert = std.debug.assert;
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const io = std.io;
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const net = std.net;
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pub const BytePacketBuffer = struct {
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buf: [512]u8 = undefined,
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try testing.expectEqualStrings(expected, outstr);
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}
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pub const DnsHeader = packed struct {
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id: u16 = 0,
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recursion_desired: bool = false,
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truncated_message: bool = false,
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authoritative_answer: bool = false,
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opcode: u4 = 0,
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response: bool = false,
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rescode: enum(u4) {
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noerror = 0,
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formerr = 1,
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servfail = 2,
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nxdomain = 3,
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notimp = 4,
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refused = 5,
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} = .noerror,
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checking_disabled: bool = false,
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authed_data: bool = false,
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z: bool = false,
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recursion_available: bool = false,
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questions: u16 = 0,
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answers: u16 = 0,
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authoritative_entries: u16 = 0,
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resource_entries: u16 = 0,
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};
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pub const QueryType = enum(u16) {
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a = 1,
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unknown,
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};
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pub const DnsQuestion = struct {
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name: []const u8,
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qtype: QueryType,
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pub fn read(self: *DnsQuestion, buffer: *BytePacketBuffer, alloc: std.mem.Allocator) !void {
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self.name = try buffer.readQnameAlloc(alloc);
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self.qtype = @enumFromInt(try buffer.reader().readInt(u16, .big));
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_ = try buffer.reader().readInt(u16, .big); // class
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}
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};
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// TODO: add DnsQuestion.read test
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pub const DnsRecord = union(QueryType) {
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unknown: struct {
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domain: []const u8,
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qtype: u16,
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data_len: u16,
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ttl: u32,
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},
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a: struct {
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domain: []const u8,
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addr: net.Ip4Address,
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ttl: u32,
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},
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};