Date: Thu, 2 Nov 1995 07:23:40 +1100 (EST) From: michael butler <imb@scgt.oz.au> To: current@freebsd.org Subject: apparent tcp double-send ? Message-ID: <199511012023.HAA19813@asstdc.scgt.oz.au>
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I noticed this whilst doing a little snooping .. ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: S 951910400:951910400(0) win 4096 <mss 536> (ttl 59, id 6771) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: S 951910400:951910400(0) win 4096 <mss 536> (ttl 58, id 6771) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: S 4154539922:4154539922(0) ack 951910401 win 16384 <mss 1460> (ttl 64, id 12805) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: S 4154539922:4154539922(0) ack 951910401 win 16384 <mss 1460> (ttl 63, id 12805) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: . ack 1 win 4096 (ttl 59, id 6772) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: . ack 1 win 4096 (ttl 58, id 6772) asstdc.scgt.oz.au.4957 > ppp1.asstdc.com.au.auth: S 4154580138:4154580138(0) win 16384 <mss 1460,nop,wscale 0,nop,nop,timestamp| (ttl 64, id 12808) asstdc.scgt.oz.au.4957 > ppp1.asstdc.com.au.auth: S 4154580138:4154580138(0) win 16384 <mss 1460,nop,wscale 0,nop,nop,timestamp| (ttl 63, id 12808) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: P 1:282(281) ack 1 win 4096 (ttl 59, id 6773) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: P 1:282(281) ack 1 win 4096 (ttl 58, id 6773) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: . ack 282 win 16103 (ttl 64, id 12812) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: . ack 282 win 16103 (ttl 63, id 12812) ppp1.asstdc.com.au.auth > asstdc.scgt.oz.au.4957: R 0:0(0) ack 4154580139 win 0 (ttl 59, id 6774) ppp1.asstdc.com.au.auth > asstdc.scgt.oz.au.4957: R 0:0(0) ack 1 win 0 (ttl 58, id 6774) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: P 1:101(100) ack 282 win 16384 (ttl 64, id 12825) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: . 101:613(512) ack 282 win 16384 (ttl 64, id 12826) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: P 1:101(100) ack 282 win 16384 (ttl 63, id 12825) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: . 101:613(512) ack 282 win 16384 (ttl 63, id 12826) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: FP 613:619(6) ack 282 win 16384 (ttl 64, id 12829) asstdc.scgt.oz.au.http > ppp1.asstdc.com.au.1091: FP 613:619(6) ack 282 win 16384 (ttl 63, id 12829) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: . ack 101 win 3996 (ttl 59, id 6775) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: . ack 101 win 3996 (ttl 58, id 6775) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: . ack 613 win 3584 (ttl 59, id 6776) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: . ack 613 win 3584 (ttl 58, id 6776) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: . ack 620 win 4090 (ttl 59, id 6777) ppp1.asstdc.com.au.1091 > asstdc.scgt.oz.au.http: . ack 620 win 4090 (ttl 58, id 6777) ppp1 is connected via another -current machine which uses the same address for ethernet and ppp but no proxy arp. Strange MSS .. anyway, ppp1 is using Trumpet 2.0b .. is this BSD, Trumpet or TcpDump ? Suggestions ? michael
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