Source Port Destination Port
Sequence Number
Acknowledgment Number
Data Offset reserved ECN Control Bits Window
Checksum Urgent Pointer
Options and padding :::
Data :::
Data Offset means the tcp header size (the total tcp header size is 4 * data offset value)
Example:
11:33:36.528451 IP (tos 0x0, ttl 119, id 7521, offset 0, flags [DF], proto TCP (6), length 52) 220.135.29.14.20715 > 140.113.28.230.ssh: S, cksum 0xff17 (correct), 2213150055:2213150055(0) win 64240
0x0000: 4500 0034 1d61 4000 7706 4376 dc87 1d0e E..4.a@.w.Cv....
0x0010: 8c71 1ce6 50eb 0016 83e9 fd67 0000 0000 .q..P......g....
0x0020: 8002 faf0 ff17 0000 0204 0584 0103 0300 ................
0x0030: 0101 0402
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