package stun

import (
	"net"
	"testing"
)

func TestRFC5769(t *testing.T) {
	// Test Vectors for Session Traversal Utilities for NAT (STUN)
	// see https://tools.ietf.org/html/rfc5769
	t.Run("Request", func(t *testing.T) {
		m := &Message{
			Raw: []byte("\x00\x01\x00\x58" +
				"\x21\x12\xa4\x42" +
				"\xb7\xe7\xa7\x01\xbc\x34\xd6\x86\xfa\x87\xdf\xae" +
				"\x80\x22\x00\x10" +
				"STUN test client" +
				"\x00\x24\x00\x04" +
				"\x6e\x00\x01\xff" +
				"\x80\x29\x00\x08" +
				"\x93\x2f\xf9\xb1\x51\x26\x3b\x36" +
				"\x00\x06\x00\x09" +
				"\x65\x76\x74\x6a\x3a\x68\x36\x76\x59\x20\x20\x20" +
				"\x00\x08\x00\x14" +
				"\x9a\xea\xa7\x0c\xbf\xd8\xcb\x56\x78\x1e\xf2\xb5" +
				"\xb2\xd3\xf2\x49\xc1\xb5\x71\xa2" +
				"\x80\x28\x00\x04" +
				"\xe5\x7a\x3b\xcf",
			),
		}
		if err := m.Decode(); err != nil {
			t.Error(err)
		}
		software := new(Software)
		if err := software.GetFrom(m); err != nil {
			t.Error(err)
		}
		if software.String() != "STUN test client" {
			t.Error("bad software: ", software)
		}
		if err := Fingerprint.Check(m); err != nil {
			t.Error("check failed: ", err)
		}
		t.Run("Long-Term credentials", func(t *testing.T) {
			m := &Message{
				Raw: []byte("\x00\x01\x00\x60" +
					"\x21\x12\xa4\x42" +
					"\x78\xad\x34\x33\xc6\xad\x72\xc0\x29\xda\x41\x2e" +
					"\x00\x06\x00\x12" +
					"\xe3\x83\x9e\xe3\x83\x88\xe3\x83\xaa\xe3\x83\x83" +
					"\xe3\x82\xaf\xe3\x82\xb9\x00\x00" +
					"\x00\x15\x00\x1c" +
					"\x66\x2f\x2f\x34\x39\x39\x6b\x39\x35\x34\x64\x36" +
					"\x4f\x4c\x33\x34\x6f\x4c\x39\x46\x53\x54\x76\x79" +
					"\x36\x34\x73\x41" +
					"\x00\x14\x00\x0b" +
					"\x65\x78\x61\x6d\x70\x6c\x65\x2e\x6f\x72\x67\x00" +
					"\x00\x08\x00\x14" +
					"\xf6\x70\x24\x65\x6d\xd6\x4a\x3e\x02\xb8\xe0\x71" +
					"\x2e\x85\xc9\xa2\x8c\xa8\x96\x66",
				),
			}
			if err := m.Decode(); err != nil {
				t.Error(err)
			}
			u := new(Username)
			if err := u.GetFrom(m); err != nil {
				t.Error(err)
			}
			expectedUsername := "\u30DE\u30C8\u30EA\u30C3\u30AF\u30B9"
			if u.String() != expectedUsername {
				t.Errorf("username: %q (got) != %q (exp)", u, expectedUsername)
			}
			n := new(Nonce)
			if err := n.GetFrom(m); err != nil {
				t.Error(err)
			}
			if n.String() != "f//499k954d6OL34oL9FSTvy64sA" {
				t.Error("bad nonce")
			}
			r := new(Realm)
			if err := r.GetFrom(m); err != nil {
				t.Error(err)
			}
			if r.String() != "example.org" {
				t.Error("bad realm")
			}
			// checking HMAC
			i := NewLongTermIntegrity(
				"\u30DE\u30C8\u30EA\u30C3\u30AF\u30B9",
				"example.org",
				"TheMatrIX",
			)
			if err := i.Check(m); err != nil {
				t.Error(err)
			}
		})
	})
	t.Run("Response", func(t *testing.T) {
		t.Run("IPv4", func(t *testing.T) {
			m := &Message{
				Raw: []byte("\x01\x01\x00\x3c" +
					"\x21\x12\xa4\x42" +
					"\xb7\xe7\xa7\x01\xbc\x34\xd6\x86\xfa\x87\xdf\xae" +
					"\x80\x22\x00\x0b" +
					"\x74\x65\x73\x74\x20\x76\x65\x63\x74\x6f\x72\x20" +
					"\x00\x20\x00\x08" +
					"\x00\x01\xa1\x47\xe1\x12\xa6\x43" +
					"\x00\x08\x00\x14" +
					"\x2b\x91\xf5\x99\xfd\x9e\x90\xc3\x8c\x74\x89\xf9" +
					"\x2a\xf9\xba\x53\xf0\x6b\xe7\xd7" +
					"\x80\x28\x00\x04" +
					"\xc0\x7d\x4c\x96",
				),
			}
			if err := m.Decode(); err != nil {
				t.Error(err)
			}
			software := new(Software)
			if err := software.GetFrom(m); err != nil {
				t.Error(err)
			}
			if software.String() != "test vector" {
				t.Error("bad software: ", software)
			}
			if err := Fingerprint.Check(m); err != nil {
				t.Error("Check failed: ", err)
			}
			addr := new(XORMappedAddress)
			if err := addr.GetFrom(m); err != nil {
				t.Error(err)
			}
			if !addr.IP.Equal(net.ParseIP("192.0.2.1")) {
				t.Error("bad IP")
			}
			if addr.Port != 32853 {
				t.Error("bad Port")
			}
			if err := Fingerprint.Check(m); err != nil {
				t.Error("check failed: ", err)
			}
		})
		t.Run("IPv6", func(t *testing.T) {
			m := &Message{
				Raw: []byte("\x01\x01\x00\x48" +
					"\x21\x12\xa4\x42" +
					"\xb7\xe7\xa7\x01\xbc\x34\xd6\x86\xfa\x87\xdf\xae" +
					"\x80\x22\x00\x0b" +
					"\x74\x65\x73\x74\x20\x76\x65\x63\x74\x6f\x72\x20" +
					"\x00\x20\x00\x14" +
					"\x00\x02\xa1\x47" +
					"\x01\x13\xa9\xfa\xa5\xd3\xf1\x79" +
					"\xbc\x25\xf4\xb5\xbe\xd2\xb9\xd9" +
					"\x00\x08\x00\x14" +
					"\xa3\x82\x95\x4e\x4b\xe6\x7b\xf1\x17\x84\xc9\x7c" +
					"\x82\x92\xc2\x75\xbf\xe3\xed\x41" +
					"\x80\x28\x00\x04" +
					"\xc8\xfb\x0b\x4c",
				),
			}
			if err := m.Decode(); err != nil {
				t.Error(err)
			}
			software := new(Software)
			if err := software.GetFrom(m); err != nil {
				t.Error(err)
			}
			if software.String() != "test vector" {
				t.Error("bad software: ", software)
			}
			if err := Fingerprint.Check(m); err != nil {
				t.Error("Check failed: ", err)
			}
			addr := new(XORMappedAddress)
			if err := addr.GetFrom(m); err != nil {
				t.Error(err)
			}
			if !addr.IP.Equal(net.ParseIP("2001:db8:1234:5678:11:2233:4455:6677")) {
				t.Error("bad IP")
			}
			if addr.Port != 32853 {
				t.Error("bad Port")
			}
			if err := Fingerprint.Check(m); err != nil {
				t.Error("check failed: ", err)
			}
		})
	})
}