@@ -29,6 +29,27 @@ pub const Message = struct {
refused,
_, // Reserved for future use
};
pub fn fromBytes(bytes: [12]u8) Header {
const id: u16 = @byteSwap(@as(u16, @bitCast(bytes[0..2].*)));
const hbits: u8 = bytes[2];
const lbits: u8 = bytes[3];
return .{
.id = id,
.qr = 0x80 & hbits != 0,
.opcode = 0,
.aa = 0x4 & hbits != 0,
.tc = 0x2 & hbits != 0,
.rd = 0x1 & hbits != 0,
.ra = 0x8 & hbits != 0,
.rcode = @enumFromInt(0xf & (lbits)),
.qdcount = @byteSwap(@as(u16, @bitCast(bytes[4..6].*))),
.ancount = @byteSwap(@as(u16, @bitCast(bytes[6..8].*))),
.nscount = @byteSwap(@as(u16, @bitCast(bytes[8..10].*))),
.arcount = @byteSwap(@as(u16, @bitCast(bytes[10..12].*))),
};
}
};
pub const Question = struct {
@@ -116,6 +137,17 @@ pub const Message = struct {
pub fn write(_: Additional) void {}
};
pub fn fromBytes(a: Allocator, bytes: []const u8) !Message {
if (bytes.len < 12) return error.MessageTooSmall;
const header: Header = .fromBytes(bytes[0..12].*);
std.debug.print("{}\n", .{header});
_ = a;
return .{
.header = header,
};
}
pub fn query(a: Allocator, fqdn: []const []const u8) !Message {
const queries = try a.alloc(Question, fqdn.len);
for (queries, fqdn) |*q, dn| {
@@ -257,6 +289,19 @@ pub fn server() !void {
std.debug.print("sent {}\n", .{icnt});
}
test "grht vectors" {
const a = std.testing.allocator;
const vector = [_]u8{
122, 105, 129, 128, 0, 1, 0, 1, 0, 0, 0, 0,
2, 103, 114, 2, 104, 116, 0, 0, 1, 0, 1, 192,
12, 0, 1, 0, 1, 0, 0, 14, 16, 0, 4, 144,
126, 209, 12,
};
const msg = try Message.fromBytes(a, &vector);
_ = msg;
}
test "simple test" {}
test "fuzz example" {