WifiLamp: Difference between revisions
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=== Turn off === | === Turn off === | ||
<pre> | <pre> | ||
root@LEDE:~# tcpdump -i wlan0 host 192.168.1.240 -X | root@LEDE:~# tcpdump -i wlan0 host 192.168.1.240 -X | ||
Revision as of 22:30, 3 November 2019
| Project WifiLamp | |
|---|---|
| |
| Investigating my Action WiFi enabled LED lamp | |
| Status | Initializing |
| Contact | bertrik |
| Last Update | 2019-11-03 |
Intro
This page is about a WiFi enabled LED lamp from the Action store, with E27 form factor. The associated Android app refers to this lamp as A60 RGB-CCT.
I hoped this would be an ESP8266 based lamp, so it can possibly be flashed with my StofAnanas/stoflama firmware so it can indicate local air quality (PM10).
More info:
- https://www.action.com/nl-nl/p/lsc-smart-connect-slimme-multicolor-ledlamp-3/
- https://www.letscontrolit.com/forum/viewtopic.php?t=6955
- https://www.circuitsonline.net/forum/view/146361/1
- https://github.com/arendst/Tasmota/issues/6495
Hardware info
The lamp communicates over 2.4 GHz WiFi.
It has two setup modes, triggered by switching it off-and-on three times quickly in a row
- fast blink mode: about 1 blink per second
- slow blink mode: about 1 blink per 3 seconds
The manufacturer part of the MAC address (68:57:2d:1a:6a:ea) points to "HANGZHOU AIXIANGJI TECHNOLOGY CO., LTD", see https://www.cleancss.com/mac-lookup/68-57-2D
It received ip address 192.168.1.240 through DHCP from an OpenWRT router.
Protocol
I sniffed the protocol using TCP dump.
Changing the state of the lamp by the app causes a message to be sent to ec2-3-121-210-75.eu-central-1.compute.amazonaws.com.8886
The local protocol appears to use UDP. There is an UDP broadcast message sent by the lamp consisting of 172 bytes.
Capture
Broadcast
In OFF mode, it sends:
21:17:39.434577 IP 192.168.1.240.49153 > 255.255.255.255.6667: UDP, length 172
0x0000: 4500 00c8 0609 0000 ff11 f283 c0a8 01f0 E...............
0x0010: ffff ffff c001 1a0b 00b4 f1e8 0000 55aa ..............U.
0x0020: 0000 0000 0000 0013 0000 009c 0000 0000 ................
0x0030: d097 6667 6f33 69eb 10b5 e9f1 32fd 802a ..fgo3i.....2..*
0x0040: 748d b61a 5e0b 3034 aff7 9af9 cddc f214 t...^.04........
0x0050: 4ef9 12df 8046 2fa3 7469 859b 52d0 97eb N....F/.ti..R...
0x0060: 35d6 9379 4bc7 a48f 53c5 29be 7e05 2782 5..yK...S.).~.'.
0x0070: 7256 f992 ef0b b3c9 946f 6ca8 e2e1 4853 rV.......ol...HS
0x0080: 2e0d bc9a 92c3 3172 86eb f238 be57 9786 ......1r...8.W..
0x0090: a9e3 b2e7 b4bb 197b 7ef4 b0f2 267e 06c8 .......{~...&~..
0x00a0: 5594 f0a3 1645 4ac1 6035 27f9 845c 201b U....EJ.`5'..\..
0x00b0: 7a23 e3b2 249f 5adf 48a7 14f8 51aa f439 z#..$.Z.H...Q..9
0x00c0: e9a5 9add 0000 aa55 .......U
In ON mode, it sends:
21:17:59.439649 IP 192.168.1.240.49153 > 255.255.255.255.6667: UDP, length 172
0x0000: 4500 00c8 060f 0000 ff11 f27d c0a8 01f0 E..........}....
0x0010: ffff ffff c001 1a0b 00b4 f1e8 0000 55aa ..............U.
0x0020: 0000 0000 0000 0013 0000 009c 0000 0000 ................
0x0030: d097 6667 6f33 69eb 10b5 e9f1 32fd 802a ..fgo3i.....2..*
0x0040: 748d b61a 5e0b 3034 aff7 9af9 cddc f214 t...^.04........
0x0050: 4ef9 12df 8046 2fa3 7469 859b 52d0 97eb N....F/.ti..R...
0x0060: 35d6 9379 4bc7 a48f 53c5 29be 7e05 2782 5..yK...S.).~.'.
0x0070: 7256 f992 ef0b b3c9 946f 6ca8 e2e1 4853 rV.......ol...HS
0x0080: 2e0d bc9a 92c3 3172 86eb f238 be57 9786 ......1r...8.W..
0x0090: a9e3 b2e7 b4bb 197b 7ef4 b0f2 267e 06c8 .......{~...&~..
0x00a0: 5594 f0a3 1645 4ac1 6035 27f9 845c 201b U....EJ.`5'..\..
0x00b0: 7a23 e3b2 249f 5adf 48a7 14f8 51aa f439 z#..$.Z.H...Q..9
0x00c0: e9a5 9add 0000 aa55
Turn ON
Turn ON the lamp: (captured with tcpdump -i wlan0 src 192.168.1.240 -X)
20:40:56.712025 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [P.], seq 137:208, ack 173, win 65535, length 71
0x0000: 4500 006f 9522 4000 4006 2074 c0a8 01b2 E..o."@.@..t....
0x0010: c0a8 01f0 a23a 1a0c fa68 52cc 0000 948d .....:...hR.....
0x0020: 5018 ffff e352 0000 0000 55aa 0000 0002 P....R....U.....
0x0030: 0000 000d 0000 0037 332e 3300 0000 0000 .......73.3.....
0x0040: 0000 0700 0920 d832 0d91 0fb0 41e1 240d .......2....A.$.
0x0050: c133 b03e c6da 47a5 9b4f bcd1 e4b9 8a03 .3.>..G..O......
0x0060: dee7 2c3f cc02 5a2b 04c4 af00 00aa 55 ..,?..Z+......U
20:40:56.712085 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [P.], seq 137:208, ack 173, win 65535, length 71
0x0000: 4500 006f 9522 4000 4006 2074 c0a8 01b2 E..o."@.@..t....
0x0010: c0a8 01f0 a23a 1a0c fa68 52cc 0000 948d .....:...hR.....
0x0020: 5018 ffff e352 0000 0000 55aa 0000 0002 P....R....U.....
0x0030: 0000 000d 0000 0037 332e 3300 0000 0000 .......73.3.....
0x0040: 0000 0700 0920 d832 0d91 0fb0 41e1 240d .......2....A.$.
0x0050: c133 b03e c6da 47a5 9b4f bcd1 e4b9 8a03 .3.>..G..O......
0x0060: dee7 2c3f cc02 5a2b 04c4 af00 00aa 55 ..,?..Z+......U
20:40:56.720005 IP 192.168.1.240.49153 > ec2-18-185-218-106.eu-central-1.compute.amazonaws.com.8886: Flags [P.], seq 138:319, ack 139, win 2368, length 181
0x0000: 4500 00dd 03d4 0000 ff06 078b c0a8 01f0 E...............
0x0010: 12b9 da6a c001 22b6 0000 3e44 4a38 df8e ...j.."...>DJ8..
0x0020: 5018 0940 d7e8 0000 1703 0300 b042 416f P..@.........BAo
0x0030: 6862 6d64 3661 4739 3149 4652 31f8 e4a1 hbmd6aG91IFR1...
0x0040: 84ce d52e bdc1 a36d 84e3 43e1 10e9 0b16 .......m..C.....
0x0050: 2702 bc93 e1f1 aad3 fa06 3ec4 fa3d b2fa '.........>..=..
0x0060: 8238 7687 6f05 8abf 140b 4da3 5cee c8b8 .8v.o.....M.\...
0x0070: aa4f cd1f c989 1ca9 1d0c 795f c06a d484 .O........y_.j..
0x0080: 2a6f 924b 2cf8 c2a1 7585 a85b a136 5cc1 *o.K,...u..[.6\.
0x0090: 80ac 1404 4850 2881 4a8a b76b 411a ae59 ....HP(.J..kA..Y
0x00a0: 1b7a bbb8 aba7 4ff1 3783 7bc1 de48 72cd .z....O.7.{..Hr.
0x00b0: 9a98 e1b9 457c 81c1 9254 d377 27eb ed3c ....E|...T.w'..<
0x00c0: 9fe4 263e 41ca fc6e 1526 ef33 e7f8 88be ..&>A..n.&.3....
0x00d0: e92b 6456 f8a2 c599 797b 7a8e 1f .+dV....y{z..
20:40:56.720845 IP 192.168.1.240.6668 > 192.168.1.178.41530: Flags [P.], seq 173:264, ack 208, win 2713, length 91
0x0000: 4500 0083 03d5 0000 ff06 32ad c0a8 01f0 E.........2.....
0x0010: c0a8 01b2 1a0c a23a 0000 948d fa68 5313 .......:.....hS.
0x0020: 5018 0a99 d5e4 0000 0000 55aa 0000 0000 P.........U.....
0x0030: 0000 0008 0000 004b 0000 0000 332e 3300 .......K....3.3.
0x0040: 0000 0000 0000 1c00 0000 0132 0d91 0fb0 ...........2....
0x0050: 41e1 240d c133 b03e c6da 47be e5c9 a66a A.$..3.>..G....j
0x0060: a6b6 5174 6eee e672 bac9 d94f 0c58 6945 ..Qtn..r...O.XiE
0x0070: 347a 49aa 4b75 0d05 5c3c e11e 07fb 7a00 4zI.Ku..\<....z.
0x0080: 00aa 55 ..U
20:40:56.720905 IP 192.168.1.240.6668 > 192.168.1.178.41530: Flags [P.], seq 173:264, ack 208, win 2713, length 91
0x0000: 4500 0083 03d5 0000 ff06 32ad c0a8 01f0 E.........2.....
0x0010: c0a8 01b2 1a0c a23a 0000 948d fa68 5313 .......:.....hS.
0x0020: 5018 0a99 d5e4 0000 0000 55aa 0000 0000 P.........U.....
0x0030: 0000 0008 0000 004b 0000 0000 332e 3300 .......K....3.3.
0x0040: 0000 0000 0000 1c00 0000 0132 0d91 0fb0 ...........2....
0x0050: 41e1 240d c133 b03e c6da 47be e5c9 a66a A.$..3.>..G....j
0x0060: a6b6 5174 6eee e672 bac9 d94f 0c58 6945 ..Qtn..r...O.XiE
0x0070: 347a 49aa 4b75 0d05 5c3c e11e 07fb 7a00 4zI.Ku..\<....z.
0x0080: 00aa 55 ..U
20:40:56.740665 IP ec2-18-185-218-106.eu-central-1.compute.amazonaws.com.8886 > 192.168.1.240.49153: Flags [P.], seq 139:208, ack 319, win 33768, length 69
0x0000: 4500 006d 0d3c 4000 ed06 d092 12b9 da6a E..m.<@........j
0x0010: c0a8 01f0 22b6 c001 4a38 df8e 0000 3ef9 ...."...J8....>.
0x0020: 5018 83e8 27fd 0000 1703 0300 400e 80aa P...'.......@...
0x0030: 276e 5c0b 606e c30e 255a 5290 f2e9 2cf9 'n\.`n..%ZR...,.
0x0040: 77b4 d09c 582d fe23 8bb9 cfec 78fc 906c w...X-.#....x..l
0x0050: 615b cc88 6e71 dd85 af36 0f14 e973 3649 a[..nq...6...s6I
0x0060: 7c5e 19a3 f7ba 1607 369f 25f5 93 |^......6.%..
20:40:56.823365 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [.], ack 264, win 65535, length 0
0x0000: 4500 0028 9523 4000 4006 20ba c0a8 01b2 E..(.#@.@.......
0x0010: c0a8 01f0 a23a 1a0c fa68 5313 0000 94e8 .....:...hS.....
0x0020: 5010 ffff 8c36 0000 P....6..
20:40:56.823505 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [.], ack 264, win 65535, length 0
0x0000: 4500 0028 9523 4000 4006 20ba c0a8 01b2 E..(.#@.@.......
0x0010: c0a8 01f0 a23a 1a0c fa68 5313 0000 94e8 .....:...hS.....
0x0020: 5010 ffff 8c36 0000 P....6..
20:40:56.825725 IP 192.168.1.240.6668 > 192.168.1.178.41530: Flags [P.], seq 264:292, ack 208, win 2713, length 28
0x0000: 4500 0044 03d6 0000 ff06 32eb c0a8 01f0 E..D......2.....
0x0010: c0a8 01b2 1a0c a23a 0000 94e8 fa68 5313 .......:.....hS.
0x0020: 5018 0a99 a438 0000 0000 55aa 0000 0002 P....8....U.....
0x0030: 0000 000d 0000 000c 0000 0000 8de1 4f44 ..............OD
0x0040: 0000 aa55 ...U
20:40:56.825785 IP 192.168.1.240.6668 > 192.168.1.178.41530: Flags [P.], seq 264:292, ack 208, win 2713, length 28
0x0000: 4500 0044 03d6 0000 ff06 32eb c0a8 01f0 E..D......2.....
0x0010: c0a8 01b2 1a0c a23a 0000 94e8 fa68 5313 .......:.....hS.
0x0020: 5018 0a99 a438 0000 0000 55aa 0000 0002 P....8....U.....
0x0030: 0000 000d 0000 000c 0000 0000 8de1 4f44 ..............OD
0x0040: 0000 aa55 ...U
20:40:56.829005 IP 192.168.1.240.49153 > ec2-18-185-218-106.eu-central-1.compute.amazonaws.com.8886: Flags [.], ack 208, win 2299, length 0
0x0000: 4500 0028 03d7 0000 ff06 083d c0a8 01f0 E..(.......=....
0x0010: 12b9 da6a c001 22b6 0000 3ef9 4a38 dfd3 ...j.."...>.J8..
0x0020: 5010 08fb ab60 0000 P....`..
20:40:56.927465 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [.], ack 292, win 65535, length 0
0x0000: 4500 0028 9524 4000 4006 20b9 c0a8 01b2 E..(.$@.@.......
0x0010: c0a8 01f0 a23a 1a0c fa68 5313 0000 9504 .....:...hS.....
0x0020: 5010 ffff 8c1a 0000 P.......
20:40:56.927545 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [.], ack 292, win 65535, length 0
0x0000: 4500 0028 9524 4000 4006 20b9 c0a8 01b2 E..(.$@.@.......
0x0010: c0a8 01f0 a23a 1a0c fa68 5313 0000 9504 .....:...hS.....
0x0020: 5010 ffff 8c1a 0000 P.......
Turn off
root@LEDE:~# tcpdump -i wlan0 host 192.168.1.240 -X tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on wlan0, link-type EN10MB (Ethernet), capture size 262144 bytes 20:41:40.762601 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [P.], seq 4201141059:4201141130, ack 38204, win 65535, length 71 0x0000: 4500 006f 9529 4000 4006 206d c0a8 01b2 E..o.)@.@..m.... 0x0010: c0a8 01f0 a23a 1a0c fa68 5343 0000 953c .....:...hSC...< 0x0020: 5018 ffff e696 0000 0000 55aa 0000 0003 P.........U..... 0x0030: 0000 000d 0000 0037 332e 3300 0000 0000 .......73.3..... 0x0040: 0000 0800 0920 d8a8 5b7e 1c66 c995 c4fa ........[~.f.... 0x0050: 49ba 3815 3f33 2863 f141 c27e 0295 4406 I.8.?3(c.A.~..D. 0x0060: c8d5 b6ad 8b11 0084 bfe8 f400 00aa 55 ..............U 20:41:40.762661 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [P.], seq 0:71, ack 1, win 65535, length 71 0x0000: 4500 006f 9529 4000 4006 206d c0a8 01b2 E..o.)@.@..m.... 0x0010: c0a8 01f0 a23a 1a0c fa68 5343 0000 953c .....:...hSC...< 0x0020: 5018 ffff e696 0000 0000 55aa 0000 0003 P.........U..... 0x0030: 0000 000d 0000 0037 332e 3300 0000 0000 .......73.3..... 0x0040: 0000 0800 0920 d8a8 5b7e 1c66 c995 c4fa ........[~.f.... 0x0050: 49ba 3815 3f33 2863 f141 c27e 0295 4406 I.8.?3(c.A.~..D. 0x0060: c8d5 b6ad 8b11 0084 bfe8 f400 00aa 55 ..............U 20:41:40.769801 IP 192.168.1.240.49153 > ec2-18-185-218-106.eu-central-1.compute.amazonaws.com.8886: Flags [P.], seq 16190:16371, ack 1245241368, win 2230, length 181 0x0000: 4500 00dd 03e5 0000 ff06 077a c0a8 01f0 E..........z.... 0x0010: 12b9 da6a c001 22b6 0000 3f3e 4a38 e018 ...j.."...?>J8.. 0x0020: 5018 08b6 decb 0000 1703 0300 b042 416f P............BAo 0x0030: 6862 6d64 3661 4739 3149 4652 31f8 e4a1 hbmd6aG91IFR1... 0x0040: 84ce d52e bdc1 a36d 84e3 43e1 10e9 0b16 .......m..C..... 0x0050: 2702 bc93 e1f1 aad3 fa06 3ec4 fad5 6d54 '.........>...mT 0x0060: ae1f 4737 24ea 45e7 83ad 1c44 97aa ae01 ..G7$.E....D.... 0x0070: dcd4 2763 273c 4951 5c5f 1672 3183 c8c7 ..'c'<IQ\_.r1... 0x0080: a5cb e55a f359 2c63 b582 04d5 65ec b63b ...Z.Y,c....e..; 0x0090: 0833 1c0f 78b9 b1f0 d85a b345 2cc6 90dc .3..x....Z.E,... 0x00a0: c289 087c 4291 a6f7 183a a960 4dcd 8cbe ...|B....:.`M... 0x00b0: 5f1e f70b 0139 0647 c382 95a9 4b2e 8de3 _....9.G....K... 0x00c0: 5a45 282d 74e6 8dbe bd28 321c 41a0 46ed ZE(-t....(2.A.F. 0x00d0: a2ce c9a4 6ba6 53c4 0eea 4179 92 ....k.S...Ay. 20:41:40.771661 IP 192.168.1.240.6668 > 192.168.1.178.41530: Flags [P.], seq 1:92, ack 71, win 2594, length 91 0x0000: 4500 0083 03e6 0000 ff06 329c c0a8 01f0 E.........2..... 0x0010: c0a8 01b2 1a0c a23a 0000 953c fa68 538a .......:...<.hS. 0x0020: 5018 0a22 c1c4 0000 0000 55aa 0000 0000 P.."......U..... 0x0030: 0000 0008 0000 004b 0000 0000 332e 3300 .......K....3.3. 0x0040: 0000 0000 0000 1d00 0000 01a8 5b7e 1c66 ............[~.f 0x0050: c995 c4fa 49ba 3815 3f33 2859 e9bc a724 ....I.8.?3(Y...$ 0x0060: 276a 8b68 656a 48ca 92af ebe9 437a 4039 'j.hejH.....Cz@9 0x0070: f372 d4c8 e56d 2833 2f49 fbfe ef76 ba00 .r...m(3/I...v.. 0x0080: 00aa 55 ..U 20:41:40.771721 IP 192.168.1.240.6668 > 192.168.1.178.41530: Flags [P.], seq 1:92, ack 71, win 2594, length 91 0x0000: 4500 0083 03e6 0000 ff06 329c c0a8 01f0 E.........2..... 0x0010: c0a8 01b2 1a0c a23a 0000 953c fa68 538a .......:...<.hS. 0x0020: 5018 0a22 c1c4 0000 0000 55aa 0000 0000 P.."......U..... 0x0030: 0000 0008 0000 004b 0000 0000 332e 3300 .......K....3.3. 0x0040: 0000 0000 0000 1d00 0000 01a8 5b7e 1c66 ............[~.f 0x0050: c995 c4fa 49ba 3815 3f33 2859 e9bc a724 ....I.8.?3(Y...$ 0x0060: 276a 8b68 656a 48ca 92af ebe9 437a 4039 'j.hejH.....Cz@9 0x0070: f372 d4c8 e56d 2833 2f49 fbfe ef76 ba00 .r...m(3/I...v.. 0x0080: 00aa 55 ..U 20:41:40.791841 IP ec2-18-185-218-106.eu-central-1.compute.amazonaws.com.8886 > 192.168.1.240.49153: Flags [P.], seq 1:70, ack 181, win 34840, length 69 0x0000: 4500 006d 0d3e 4000 ed06 d090 12b9 da6a E..m.>@........j 0x0010: c0a8 01f0 22b6 c001 4a38 e018 0000 3ff3 ...."...J8....?. 0x0020: 5018 8818 fb92 0000 1703 0300 40f3 4fc9 P...........@.O. 0x0030: 8454 7861 b2f3 5c87 3d62 ccd3 4368 8549 .Txa..\.=b..Ch.I 0x0040: 8a6b 08fe b857 6482 14c3 34fb 3caf 99fb .k...Wd...4.<... 0x0050: fffc 03b1 ddb0 b5f8 2d13 e8ad 1193 6530 ........-.....e0 0x0060: 682c 00e0 4ad5 4c8d 0374 6ddf 3f h,..J.L..tm.? 20:41:40.949741 IP 192.168.1.240.49153 > ec2-18-185-218-106.eu-central-1.compute.amazonaws.com.8886: Flags [.], ack 70, win 2161, length 0 0x0000: 4500 0028 03e7 0000 ff06 082d c0a8 01f0 E..(.......-.... 0x0010: 12b9 da6a c001 22b6 0000 3ff3 4a38 e05d ...j.."...?.J8.] 0x0020: 5010 0871 aa66 0000 P..q.f.. 20:41:41.061321 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [.], ack 92, win 65535, length 0 0x0000: 4500 0028 952a 4000 4006 20b3 c0a8 01b2 E..(.*@.@....... 0x0010: c0a8 01f0 a23a 1a0c fa68 538a 0000 9597 .....:...hS..... 0x0020: 5010 ffff 8b10 0000 P....... 20:41:41.061381 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [.], ack 92, win 65535, length 0 0x0000: 4500 0028 952a 4000 4006 20b3 c0a8 01b2 E..(.*@.@....... 0x0010: c0a8 01f0 a23a 1a0c fa68 538a 0000 9597 .....:...hS..... 0x0020: 5010 ffff 8b10 0000 P....... 20:41:41.063021 IP 192.168.1.240.6668 > 192.168.1.178.41530: Flags [P.], seq 92:120, ack 71, win 2594, length 28 0x0000: 4500 0044 03e8 0000 ff06 32d9 c0a8 01f0 E..D......2..... 0x0010: c0a8 01b2 1a0c a23a 0000 9597 fa68 538a .......:.....hS. 0x0020: 5018 0a22 9975 0000 0000 55aa 0000 0003 P..".u....U..... 0x0030: 0000 000d 0000 000c 0000 0000 5077 96c1 ............Pw.. 0x0040: 0000 aa55 ...U 20:41:41.063081 IP 192.168.1.240.6668 > 192.168.1.178.41530: Flags [P.], seq 92:120, ack 71, win 2594, length 28 0x0000: 4500 0044 03e8 0000 ff06 32d9 c0a8 01f0 E..D......2..... 0x0010: c0a8 01b2 1a0c a23a 0000 9597 fa68 538a .......:.....hS. 0x0020: 5018 0a22 9975 0000 0000 55aa 0000 0003 P..".u....U..... 0x0030: 0000 000d 0000 000c 0000 0000 5077 96c1 ............Pw.. 0x0040: 0000 aa55 ...U 20:41:41.662042 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [.], ack 120, win 65535, length 0 0x0000: 4500 0028 952b 4000 4006 20b2 c0a8 01b2 E..(.+@.@....... 0x0010: c0a8 01f0 a23a 1a0c fa68 538a 0000 95b3 .....:...hS..... 0x0020: 5010 ffff 8af4 0000 P....... 20:41:41.662102 IP 192.168.1.178.41530 > 192.168.1.240.6668: Flags [.], ack 120, win 65535, length 0 0x0000: 4500 0028 952b 4000 4006 20b2 c0a8 01b2 E..(.+@.@....... 0x0010: c0a8 01f0 a23a 1a0c fa68 538a 0000 95b3 .....:...hS..... 0x0020: 5010 ffff 8af4 0000 P.......