--- /dev/null
+# Exim test configuration 1090
+# TCP Fast Open
+
+SERVER=
+
+.include DIR/aux-var/std_conf_prefix
+
+primary_hostname = myhost.test.ex
+
+# ----- Main settings -----
+
+acl_smtp_rcpt = accept
+log_selector = +received_recipients +millisec
+
+# ----- Routers -----
+
+begin routers
+
+server:
+ driver = redirect
+ condition = ${if eq {SERVER}{server} {yes}{no}}
+ data = :blackhole:
+
+client:
+ driver = accept
+ condition = ${if eq {SERVER}{server}{no}{yes}}
+ transport = send_to_server
+
+
+# ----- Transports -----
+
+begin transports
+
+send_to_server:
+ driver = smtp
+ allow_localhost
+ hosts = 127.0.0.1
+ port = PORT_D
+ hosts_try_fastopen = *
+
+# ----- Retry -----
+
+begin retry
+
+* * F,5d,10s
+
+
+# End
+++ /dev/null
-# Exim test configuration 1990
-# TCP Fast Open
-
-SERVER=
-
-.include DIR/aux-var/std_conf_prefix
-
-primary_hostname = myhost.test.ex
-
-# ----- Main settings -----
-
-acl_smtp_rcpt = accept
-log_selector = +received_recipients +millisec
-
-# ----- Routers -----
-
-begin routers
-
-server:
- driver = redirect
- condition = ${if eq {SERVER}{server} {yes}{no}}
- data = :blackhole:
-
-client:
- driver = accept
- condition = ${if eq {SERVER}{server}{no}{yes}}
- transport = send_to_server
-
-
-# ----- Transports -----
-
-begin transports
-
-send_to_server:
- driver = smtp
- allow_localhost
- hosts = 127.0.0.1
- port = PORT_D
- hosts_try_fastopen = *
-
-# ----- Retry -----
-
-begin retry
-
-* * F,5d,10s
-
-
-# End
--- /dev/null
+2017-07-30 18:51:05.712 10HmaX-0005vi-00 <= CALLER@myhost.test.ex U=CALLER P=local S=sss for a@test.ex
+2017-07-30 18:51:05.712 10HmaX-0005vi-00 => a@test.ex R=client T=send_to_server H=127.0.0.1 [127.0.0.1] C="250 OK id=10HmaY-0005vi-00"
+2017-07-30 18:51:05.712 10HmaX-0005vi-00 Completed
+2017-07-30 18:51:05.712 10HmaZ-0005vi-00 <= CALLER@myhost.test.ex U=CALLER P=local S=sss for b@test.ex
+2017-07-30 18:51:05.712 10HmaZ-0005vi-00 => b@test.ex R=client T=send_to_server H=127.0.0.1 [127.0.0.1] TFO C="250 OK id=10HmbA-0005vi-00"
+2017-07-30 18:51:05.712 10HmaZ-0005vi-00 Completed
+
+******** SERVER ********
+2017-07-30 18:51:05.712 exim x.yz daemon started: pid=pppp, no queue runs, listening for SMTP on port PORT_D
+2017-07-30 18:51:05.712 10HmaY-0005vi-00 <= CALLER@myhost.test.ex H=localhost (myhost.test.ex) [127.0.0.1] P=esmtp S=sss id=E10HmaX-0005vi-00@myhost.test.ex for a@test.ex
+2017-07-30 18:51:05.712 10HmaY-0005vi-00 => :blackhole: <a@test.ex> R=server
+2017-07-30 18:51:05.712 10HmaY-0005vi-00 Completed
+2017-07-30 18:51:05.712 10HmbA-0005vi-00 <= CALLER@myhost.test.ex H=localhost (myhost.test.ex) [127.0.0.1] TFO P=esmtp S=sss id=E10HmaZ-0005vi-00@myhost.test.ex for b@test.ex
+2017-07-30 18:51:05.712 10HmbA-0005vi-00 => :blackhole: <b@test.ex> R=server
+2017-07-30 18:51:05.712 10HmbA-0005vi-00 Completed
+++ /dev/null
-2017-07-30 18:51:05.712 10HmaX-0005vi-00 <= CALLER@myhost.test.ex U=CALLER P=local S=sss for a@test.ex
-2017-07-30 18:51:05.712 10HmaX-0005vi-00 => a@test.ex R=client T=send_to_server H=127.0.0.1 [127.0.0.1] C="250 OK id=10HmaY-0005vi-00"
-2017-07-30 18:51:05.712 10HmaX-0005vi-00 Completed
-2017-07-30 18:51:05.712 10HmaZ-0005vi-00 <= CALLER@myhost.test.ex U=CALLER P=local S=sss for b@test.ex
-2017-07-30 18:51:05.712 10HmaZ-0005vi-00 => b@test.ex R=client T=send_to_server H=127.0.0.1 [127.0.0.1] TFO C="250 OK id=10HmbA-0005vi-00"
-2017-07-30 18:51:05.712 10HmaZ-0005vi-00 Completed
-
-******** SERVER ********
-2017-07-30 18:51:05.712 exim x.yz daemon started: pid=pppp, no queue runs, listening for SMTP on port PORT_D
-2017-07-30 18:51:05.712 10HmaY-0005vi-00 <= CALLER@myhost.test.ex H=localhost (myhost.test.ex) [127.0.0.1] P=esmtp S=sss id=E10HmaX-0005vi-00@myhost.test.ex for a@test.ex
-2017-07-30 18:51:05.712 10HmaY-0005vi-00 => :blackhole: <a@test.ex> R=server
-2017-07-30 18:51:05.712 10HmaY-0005vi-00 Completed
-2017-07-30 18:51:05.712 10HmbA-0005vi-00 <= CALLER@myhost.test.ex H=localhost (myhost.test.ex) [127.0.0.1] TFO P=esmtp S=sss id=E10HmaZ-0005vi-00@myhost.test.ex for b@test.ex
-2017-07-30 18:51:05.712 10HmbA-0005vi-00 => :blackhole: <b@test.ex> R=server
-2017-07-30 18:51:05.712 10HmbA-0005vi-00 Completed
--- /dev/null
+# TCP Fast Open
+#
+# Linux:
+# Both server and client-side TFO support must be enabled in the
+# kernel, 'sudo sh -c "echo 3 > /proc/sys/net/ipv4/tcp_fastopen"'.
+#
+# A packet capture on the loopback interface will show the TFO
+# option on the SYN, but the fast-output SMTP banner will not
+# be seen unless you also deliberately emulate a long path:
+# 'sudo tc qdisc add dev lo root netem delay 50ms'
+# You'll need iproute-tc installed, for the tc command.
+# You'll need kernel-modules-extra installed, or you get
+# an unhelpful error from RTNETLINK.
+# To tidy up: 'sudo tc qdisc delete dev lo root'
+#
+# MacOS:
+# The kernel seems to have TFO enabled both ways as default.
+# There is a net.inet.tcp.clear_tfocache parameter
+## sysctl -w foo-val
+#
+# For network delays there is something called 'Network Link Conditioner'
+# which might do the job. But how to manipulate it?
+#
+#
+# FreeBSD: it looks like you have to compile a custom kernel, with
+# 'options TCP_RFC7413' in the config. Also set
+# 'net.inet.tcp.fastopen.server_enable=1' in /etc/sysctl.conf
+# Seems to always claim TFO used by transport, if tried.
+#
+# FreeBSD: tried this setup, but we only get the banner captured 100ms after 3rd-ack:
+# #kenv net.inet.ip.fw.default_to_accept=1
+# #kldload ipfw dummynet
+# #ipfw add 00097 pipe 1 ip from 127.0.0.1 to 127.0.0.1
+# #ipfw pipe 1 config delay 50ms
+# Also, the VM managed to lose the ipv4 & 6 addrs on its main interface
+# after a while - so not usable in production
+#
+sudo perl
+system ("tc qdisc add dev lo root netem delay 50ms");
+****
+#
+#
+# Disable the TFO blackhole detection, as we seem to be running foul of it.
+# If bitten, we see the expected EINPROGRESS for sendto, yet no TFO cookie
+# option on the SYN.
+#
+sudo perl
+system ("[ -e /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec ] && echo 0 > /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec");
+****
+#
+# First time runs will see a TFO request option only; subsequent
+# ones should see the TFO cookie and fast-output SMTP banner
+# (currently on a separate packet after the server SYN,ACK but before
+# the client ACK).
+#
+# The client log => line should have a "TFO" element.
+# The server log <= line for a@test.ex should not.
+#
+# First clear any previously-obtained cookie:
+sudo perl
+open(INFO, "-|", "/usr/bin/uname -s");
+$_ = <INFO>;
+if (/^FreeBSD/) {
+system("sysctl net.inet.tcp.fastopen.client_enable=0"); system("sysctl net.inet.tcp.fastopen.client_enable=1");
+} else {
+system ("ip tcp_metrics delete 127.0.0.1");
+}
+
+****
+#
+#
+#
+exim -DSERVER=server -bd -oX PORT_D
+****
+#
+exim a@test.ex
+Testing
+****
+sleep 3
+#
+# The server log <= line for b@test.ex should have a "TFO" element, but
+# this will only be obtained when the above delay is inserted into the
+# loopback net path.
+#
+exim b@test.ex
+Testing
+****
+sleep 3
+#
+#
+sudo perl
+system ("tc qdisc delete dev lo root");
+system ("[ -e /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec ] && echo 3600 > /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec");
+****
+#
+killdaemon
+no_msglog_check
--- /dev/null
+support TCP_Fast_Open
+++ /dev/null
-# TCP Fast Open
-#
-# Linux:
-# Both server and client-side TFO support must be enabled in the
-# kernel, 'sudo sh -c "echo 3 > /proc/sys/net/ipv4/tcp_fastopen"'.
-#
-# A packet capture on the loopback interface will show the TFO
-# option on the SYN, but the fast-output SMTP banner will not
-# be seen unless you also deliberately emulate a long path:
-# 'sudo tc qdisc add dev lo root netem delay 50ms'
-# You'll need iproute-tc installed, for the tc command.
-# You'll need kernel-modules-extra installed, or you get
-# an unhelpful error from RTNETLINK.
-# To tidy up: 'sudo tc qdisc delete dev lo root'
-#
-# MacOS:
-# The kernel seems to have TFO enabled both ways as default.
-# There is a net.inet.tcp.clear_tfocache parameter
-## sysctl -w foo-val
-#
-# For network delays there is something called 'Network Link Conditioner'
-# which might do the job. But how to manipulate it?
-#
-#
-# FreeBSD: it looks like you have to compile a custom kernel, with
-# 'options TCP_RFC7413' in the config. Also set
-# 'net.inet.tcp.fastopen.server_enable=1' in /etc/sysctl.conf
-# Seems to always claim TFO used by transport, if tried.
-#
-# FreeBSD: tried this setup, but we only get the banner captured 100ms after 3rd-ack:
-# #kenv net.inet.ip.fw.default_to_accept=1
-# #kldload ipfw dummynet
-# #ipfw add 00097 pipe 1 ip from 127.0.0.1 to 127.0.0.1
-# #ipfw pipe 1 config delay 50ms
-# Also, the VM managed to lose the ipv4 & 6 addrs on its main interface
-# after a while - so not usable in production
-#
-sudo perl
-system ("tc qdisc add dev lo root netem delay 50ms");
-****
-#
-#
-# Disable the TFO blackhole detection, as we seem to be running foul of it.
-# If bitten, we see the expected EINPROGRESS for sendto, yet no TFO cookie
-# option on the SYN.
-#
-sudo perl
-system ("[ -e /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec ] && echo 0 > /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec");
-****
-#
-# First time runs will see a TFO request option only; subsequent
-# ones should see the TFO cookie and fast-output SMTP banner
-# (currently on a separate packet after the server SYN,ACK but before
-# the client ACK).
-#
-# The client log => line should have a "TFO" element.
-# The server log <= line for a@test.ex should not.
-#
-# First clear any previously-obtained cookie:
-sudo perl
-open(INFO, "-|", "/usr/bin/uname -s");
-$_ = <INFO>;
-if (/^FreeBSD/) {
-system("sysctl net.inet.tcp.fastopen.client_enable=0"); system("sysctl net.inet.tcp.fastopen.client_enable=1");
-} else {
-system ("ip tcp_metrics delete 127.0.0.1");
-}
-
-****
-#
-#
-#
-exim -DSERVER=server -bd -oX PORT_D
-****
-#
-exim a@test.ex
-Testing
-****
-sleep 3
-#
-# The server log <= line for b@test.ex should have a "TFO" element, but
-# this will only be obtained when the above delay is inserted into the
-# loopback net path.
-#
-exim b@test.ex
-Testing
-****
-sleep 3
-#
-#
-sudo perl
-system ("tc qdisc delete dev lo root");
-system ("[ -e /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec ] && echo 3600 > /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec");
-****
-#
-killdaemon
-no_msglog_check
+++ /dev/null
-support TCP_Fast_Open
git://git.exim.org / exim.git / commitdiff