Date: Wed, 2 Jul 1997 19:55:02 GMT From: Meir Dukhan <mdukhan@bis.co.il> To: freebsd-hackers@freebsd.org Cc: mdukhan@bis.co.il Subject: Help with a tcpdump output Message-ID: <199707021955.TAA00505@quasi.bis.co.il>
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Hi, We encounter some trouble while trying to print from an IBM Mainframe to a printer connected to a Freebsd 2.1.5 system. Here the tcpdump of the tentative, which failed with a EPIPE (Broken pipe) error message in the Mainframe log file. Could someone explain why 4 SYN packet (when I was expecting only 2: SYN and SYN/ACK), and why so many RST ? Also, when viewing the data with tcpshow one packet contain "lpd: malformed from address", maybe it can help. 12:30:08.472197 mainframe.1136 > freebsd-215.printer: S 3428224:3428224(0) win 8192 <mss 536> 12:30:08.472197 freebsd-215.printer > mainframe.1136: S 586300417:586300417(0) ack 3428225 win 16616 <mss 1460> (DF) 12:30:11.472197 mainframe.1136 > freebsd-215.printer: S 3428224:3428224(0) win 8192 <mss 536> 12:30:11.472197 freebsd-215.printer > mainframe.1136: . ack 1 win 16616 (DF) 12:30:14.192197 freebsd-215.printer > mainframe.1136: S 586300417:586300417(0) ack 3428225 win 16616 <mss 1460> (DF) 12:30:14.232197 mainframe.1136 > freebsd-215.printer: . ack 1 win 8192 12:30:14.242197 mainframe.1136 > freebsd-215.printer: P 1:83(82) ack 1 win 8192 12:30:14.292197 freebsd-215.printer > mainframe.1136: P 1:29(28) ack 83 win 16534 (DF) 12:30:14.292197 freebsd-215.printer > mainframe.1136: F 29:29(0) ack 83 win 16616 (DF) 12:30:14.372197 mainframe.1136 > freebsd-215.printer: . 83:619(536) ack 1 win 8192 12:30:14.372197 freebsd-215.printer > mainframe.1136: R 586300418:586300418(0) win 0 12:30:14.412197 mainframe.1136 > freebsd-215.printer: . 619:1155(536) ack 1 win 8192 12:30:14.412197 freebsd-215.printer > mainframe.1136: R 586300418:586300418(0) win 16384 12:30:14.412197 mainframe.1136 > freebsd-215.printer: . ack 29 win 8164 12:30:14.412197 freebsd-215.printer > mainframe.1136: R 586300446:586300446(0) win 16384 12:30:14.412197 mainframe.1136 > freebsd-215.printer: . ack 30 win 8163 12:30:14.412197 freebsd-215.printer > mainframe.1136: R 586300447:586300447(0) win 16384 12:30:14.422197 mainframe.1136 > freebsd-215.printer: R 3429379:3429379(0) win 0 Thanks in advance, -- Meir ps: please cc to mdukhan@bis.co.il, as I am not on this list, thanks.
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