-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 John,
On 3/27/20 13:37, john.e.gr...@wellsfargo.com.INVALID wrote: > A few random thoughts. > > First, this is really a MySQL driver thing, not a Tomcat thing. > If you want to know why the driver does what it does, look at the > driver source. There is actually a Socket constructor that allows > you to specify the local port. I don't know why you would do that, > but it's there. > > Second, it does appear to be possible for there to be multiple > connections using the same source port as long as they go to > different destinations. Just read through the various links that > people have provided. Honestly it blows my mind that that's even > possible, but that just shows how little I know about networking. > How does the client OS route return packets correctly if they have > the same source port? Because the connection is defined by *both* endpoints in a TCP connection. The client knows its own source port and the destination port as well. Imagine two clients: saddr sport daddr sport ::1 1400 x 3306 ::1 1400 y 3306 All is well, there: the OS knows where to route data returning to ::1/1400/y/3306 distinctly from ::1/1400/x/3306. But if you have two clients wanting to connect to the same destination (e.g. x:3306) then they must have distinct source ports. This is why most clients just use a random OS-assigned port. - -chris -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl5+R5QACgkQHPApP6U8 pFjLsQ/+IdSoJIPFhNfLmQnxEKEQA13Arr9vUE4A+83uh2+tHmo0nwW9VBzWYRLT hEciA++PSBKBDimaeNrjQBmNEmMfLnfWBZfc0TjDCAUEYvvBXslYyw9CySya3ISC d79hCJj55oAiua+eJ7ZN/MyRgeldwF/3CsP6lwpoH/rR9KI8/oKqt4vV64a7BuTW gSIlzKJ5BQCtGZIDZmf7PeL5d48GJnw0jdREFC8Bf8NYjS/uj8Cccy8XH7zPcraP S8krhrqemH8e6UQE3XID+qyatkHXBo5AVC16soQ0+jwDp0oxCsV0Faxk+8KollKL aWti+di9DOQkKSYHq0IgyE82sxxm8FL5vAKABpE/i9864PqwBBv9hIfk4Lyiqirx zuI3kVEEixcgVnv6Wdrmj1oGdhIcV6kHD/cXlTgMRTcGLBqrMFFfj4YdgUUHwOId ZaL1UMlH0sB9NiZtSwxnEFslHbqV6dYZjpWdBnTRjiYWbTsz5/ZLLMLxvg9V+cr2 fCc+/B+Co6q9DnUyipfDfcHfvXDoPFseMmCfXH8I/4DPD8dmAxzM9BoviL9GSnAG T0AVfKtB/HeGeZ67jZ9iIqpNVhCjxRrb1XZmoa4RUTU5J8i1xxBqpnpcYtCQXoJm q7UJpJAVOHg68NQgxh3YK7wemb9nSacWO587rhCNjkIoVKkMDCQ= =K9in -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
