Date: Sat, 30 Dec 2017 14:42:21 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 224730] ipfw dyn_keepalive sends a strange packet Message-ID: <bug-224730-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224730 Bug ID: 224730 Summary: ipfw dyn_keepalive sends a strange packet Product: Base System Version: 10.3-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: hossy-fbsd@hossy.flnet.org reproduce process: 1. install FreeBSD 10.3-R 2. enable ipfw # kldload ipfw # ipfw add 10 pass tcp from any to any 25 setup keep-state 3. dump loopback packets # tcpdump -i lo0 tcp 4. connect to sendmail # telnet localhost 25 5. wait about 5min. tcpdump's log: 16:06:42.945550 IP6 client.example.net.61971 > server.example.net.ldap: Fla= gs [S], seq 4054001667, win 65535, options [mss 16324,nop,wscale 6,sackOK,TS v= al 2061573 ecr 0], length 0 16:06:42.945573 IP6 server.example.net.ldap > client.example.net.61971: Fla= gs [S.], seq 1721556881, ack 4054001668, win 65535, options [mss 16324,nop,wsc= ale 6,sackOK,TS val 2786106269 ecr 2061573], length 0 16:06:42.945610 IP6 client.example.net.61971 > server.example.net.ldap: Fla= gs [.], ack 1, win 1274, options [nop,nop,TS val 2061573 ecr 2786106269], leng= th 0 16:06:42.945679 IP6 client.example.net.61971 > server.example.net.ldap: Fla= gs [P.], seq 1:15, ack 1, win 1274, options [nop,nop,TS val 2061573 ecr 2786106269], length 14 16:06:42.945978 IP6 server.example.net.ldap > client.example.net.61971: Fla= gs [P.], seq 1:15, ack 15, win 1274, options [nop,nop,TS val 2786106269 ecr 2061573], length 14 16:06:42.946094 IP6 client.example.net.61971 > server.example.net.ldap: Fla= gs [P.], seq 15:108, ack 15, win 1274, options [nop,nop,TS val 2061573 ecr 2786106269], length 93 16:06:42.946340 IP6 server.example.net.ldap > client.example.net.61971: Fla= gs [P.], seq 15:29, ack 108, win 1274, options [nop,nop,TS val 2786106269 ecr 2061573], length 14 16:06:42.946764 IP6 client.example.net.61971 > server.example.net.ldap: Fla= gs [P.], seq 108:255, ack 29, win 1274, options [nop,nop,TS val 2061574 ecr 2786106269], length 147 16:06:42.947396 IP6 server.example.net.ldap > client.example.net.61971: Fla= gs [P.], seq 29:80, ack 255, win 1274, options [nop,nop,TS val 2786106270 ecr 2061574], length 51 16:06:43.047712 IP6 client.example.net.61971 > server.example.net.ldap: Fla= gs [.], ack 80, win 1274, options [nop,nop,TS val 2061675 ecr 2786106270], len= gth 0 16:11:24.660499 IP6 client.example.net.61971 > server.example.net.ldap: Fla= gs [.], ack 80, win 0, length 0 16:11:24.660609 IP6 server.example.net.ldap > client.example.net.61971: Fla= gs [.], ack 255, win 1274, options [nop,nop,TS val 2786387984 ecr 2061675], le= ngth 0 l.11 [win 0, length 0] packet is strange. 1. why `win' is 0? 2. why it doesn't have timestamp? --=20 You are receiving this mail because: You are the assignee for the bug.=
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