Date: Tue, 24 Mar 1998 08:09:02 -0800 From: bmah@CA.Sandia.GOV (Bruce A. Mah) To: Snob Art Genre <benedict@echonyc.com> Cc: Arman Hazairin <arman@ai3.net>, freebsd-hackers@FreeBSD.ORG Subject: Re: TCP connection hang Message-ID: <199803241609.IAA08661@stennis.ca.sandia.gov> In-Reply-To: Your message of "Tue, 24 Mar 1998 10:12:56 EST." <Pine.GSO.3.96.980324101226.2687A-100000@echonyc.com>
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--==_Exmh_1451592674P Content-Type: text/plain; charset=us-ascii If memory serves me right, Snob Art Genre wrote: > Your SCO box doesn't seem to be sending a FIN packet to terminate the > connection. The problem is probably in the application software on the > SCO side. I'm wondering if there isn't something else at work here. Note that at the end of the trace, the SCO box sent five segments without getting any acknowledgement back from the FreeBSD machine, yet the FreeBSD machine was sending back ACK segments mostly normally before. Arman Hazairin wrote: > 15:27:42.040119 20.12.39.21.5577 > 68.10.3.1.1292: . ack 4225 win 16384 > (DF) > 15:27:42.207945 68.10.3.1.1292 > 20.12.39.21.5577: . 4225:4737(512) ack > 1 win 4096 > 15:27:42.274151 68.10.3.1.1292 > 20.12.39.21.5577: . 4737:5249(512) ack > 1 win 4096 > 15:27:42.341464 68.10.3.1.1292 > 20.12.39.21.5577: . 5249:5761(512) ack > 1 win 4096 > 15:27:42.408820 68.10.3.1.1292 > 20.12.39.21.5577: . 5761:6273(512) ack > 1 win 4096 > 15:27:42.475081 68.10.3.1.1292 > 20.12.39.21.5577: . 6273:6785(512) ack > 1 win 4096 It *almost* looks to me like the FreeBSD host just stopped sending ACKs for some reason, while the SCO box was several packets (window size 5 segments, 512-byte MSS) into slow-start. Is it possible that the application on the FreeBSD box somehow isn't reading the data out of its socket buffers? Bruce. --==_Exmh_1451592674P Content-Type: application/pgp-signature -----BEGIN PGP MESSAGE----- Version: 2.6.2 iQCVAwUBNRfanajOOi0j7CY9AQFi2AP+J2ks0GrJmK1HpTfunv3ODV7slXUK582l YDOqv70+Blvnc/WzPyH4u/cw4nxQiOxr0+imsgs6QDV8ONj0PjnFuCsWvSMR1qUp b9nsOZAgkIbEIfMXNiz9r24PilfYZGAezfg0b8HJ5SOiAzRUqAB+JIssMt92wYR7 ewFYAH1u0cw= =Hh3c -----END PGP MESSAGE----- --==_Exmh_1451592674P-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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