000000b0  aa a2 d9 80 84 7c 6d 42  f0 ee 9f a3 6c b8 83 21  |.....|mB....l..!|
000000c0  5d 7b 17 03 03 02 6d 18  d3 53 cc 09 6a 23 fc c5  |]{....m..S..j#..|
000000d0  a9 2e 73 b4 3d ea 54 56  42 f5 1f 71 3e 8f 8e 7b  |..s.=.TVB..q>..{|
000000e0  12 18 d7 d6 ab ed 24 5f  16 c8 18 5e e0 28 84 40  |......$_...^.(.@|
000000f0  89 49 a7 91 57 d6 2b a0  9c ab 5d 85 ac 4f 6b 70  |.I..W.+...]..Okp|

>>> Flow 2 (server to client)
00000000  16 03 03 00 5d 02 00 00  59 03 03 e0 da ea 5e 09  |....]...Y.....^.|
00000010  bb 30 4c 10 db 85 36 44  38 9e a4 83 74 5f 2f 94  |.0L...6D8...t_/.|
00000020  a1 b4 45 61 73 2f 88 b3  ac ad e4 20 45 55 20 90  |..Eas/..... EU .|
00000030  b0 b0 d4 70 e6 10 13 5c  f4 49 0e 9c 2a 52 5c 84  |...p...\.I..*R\.|
00000040  b2 55 1a ea e3 4b 5a 9f  ac e9 7b 37 c0 2f 00 00  |.U...KZ...{7./..|

>>> Flow 2 (server to client)
00000000  16 03 03 00 5d 02 00 00  59 03 03 4f ed 35 28 41  |....]...Y..O.5(A|
00000010  4a 0f a2 da 57 ef 60 69  32 00 a5 82 22 3d d9 ea  |J...W.`i2..."=..|
00000020  36 28 20 31 e3 4a b6 d1  b6 b4 49 20 97 f3 45 59  |6( 1.J....I ..EY|
00000030  e7 9c f5 40 57 51 b8 f8  5a 8d f2 eb ce 83 18 2d  |...@WQ..Z......-|
00000040  e3 28 55 6f 17 08 23 88  57 b1 a0 e4 cc a9 00 00  |.(Uo..#.W.......|

>>> Flow 2 (server to client)
00000000  16 03 01 00 5d 02 00 00  59 03 01 70 d2 b8 0b 74  |....]...Y..p...t|
00000010  93 b4 60 d7 ab 1d 0f f3  7c d0 b5 f8 a2 78 45 30  |..`.....|....xE0|
00000020  b1 41 9b b6 73 bd 05 d8  85 16 66 20 e8 26 8d 7a  |.A..s.....f .&.z|
00000030  e2 da e0 a0 7a c9 19 d1  dd db 2b bc b4 b2 56 39  |....z.....+...V9|
00000040  9f e6 62 75 29 96 40 b3  0d c0 db 65 c0 09 00 00  |..bu).@....e....|

00000030  6f f4 cb 8a 13 74 a2 ee  b7 27 69 b4 41 c0 90 68  |o....t...'i.A..h|
00000040  bc 02 69 e1 c6 48 4f 39  36 30 25 ca 4c 17 ce 83  |..i..HO960%.L...|
00000050  9e 08 56 e3 05 49 93 9e  2e c4 fb e6 c8 01 f1 0f  |..V..I..........|
00000060  c5 70 0f 08 83 48 e9 48  ef 6e 50 8b 05 7e e5 84  |.p...H.H.nP..~..|
00000070  25 fa 55 c7 ae 31 02 27  00 ef 3f 98 86 20 12 89  |%.U..1.'..?.. ..|

000001a0  b4 26 9a 13 1b 8f 6c 84  bc b1 78 a8 a1 e7 64 4b  |.&....l...x...dK|
000001b0  d4 56 37 b6 d1 80 6d 8d  0f c2 2f 0c 0b 9e 42 8e  |.V7...m.../...B.|
000001c0  37 e0 9b 73 e4 ab cf 24  43 86 bc d0 40 fd db 4a  |7..s...$C...@..J|
000001d0  c1 f6 55 56 e9 54 5c c7  3c 17 36 44 7b 99 7e 03  |..UV.T\.<.6D{.~.|
000001e0  48 f7 a9 cc 4d b9 b4 bf  09 dd 96 37 8c b5 d5 f0  |H...M......7....|

00000330  d8 d2 8f 85 c3 1e 35 28  4a 62 b4 a0 47 ef 10 0c  |......5(Jb..G...|
00000340  dc d0 b9 9a 46 42 34 e2  be 43 0f 67 bc f6 dd bc  |....FB4..C.g....|
00000350  ab cd 44 79 77 1a 1a c3  03 4c 1f 4a ff 7e 27 3b  |..Dyw....L.J.~';|
00000360  e1 83 84 a6 30 cf 53 ba  d9 f6 1e ae 1c 9b c3 28  |....0.S........(|
00000370  96 17 03 03 00 35 3b b4  72 13 ca b8 f1 2f dd 42  |.....5;.r..../.B|

00000030  cb 2c a2 05 19 6b 65 64  9b 71 2b d3 d2 19 cb 66  |.,...ked.q+....f|
00000040  61 c1 6f 19 b4 7a 15 41  76 14 85 fc c0 27 00 00  |a.o..z.Av....'..|
00000050  11 ff 01 00 01 00 00 0b  00 04 03 00 01 02 00 17  |................|
00000060  00 00 16 03 03 02 59 0b  00 02 55 00 02 52 00 02  |......Y...U..R..|
00000070  4f 30 82 02 4b 30 82 01  b4 a0 03 02 01 02 02 09  |O0..K0..........|

00000100  cb 3b 74                                          |.;t|
>>> Flow 2 (server to client)
00000000  16 03 03 00 5d 02 00 00  59 03 03 68 ad d5 4c 88  |....]...Y..h..L.|
00000010  60 b8 3b b4 ea e4 f2 55  7d 0f 90 d8 bd 55 b5 53  |`.;....U}....U.S|
00000020  49 6e f7 50 e4 05 70 a2  6d 9e a5 20 d1 0a e5 58  |In.P..p.m.. ...X|
00000030  38 f1 82 94 a7 c3 bf 77  60 d8 51 c2 c7 e9 8e d6  |8......w`.Q.....|

// If a and b are different IP versions, 0 is returned.
//
// See https://tools.ietf.org/html/rfc6724#section-2.2
func commonPrefixLen(a netip.Addr, b IP) (cpl int) {
	if b4 := b.To4(); b4 != nil {
		b = b4
	}
	aAsSlice := a.AsSlice()
	if len(aAsSlice) != len(b) {
		return 0
	}
	// If IPv6, only up to the prefix (first 64 bits)
	if len(aAsSlice) > 8 {
		aAsSlice = aAsSlice[:8]