X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/90e0b2485d19eea5e93b5adad2fbcce5fc48a237..f078f86ef3e6d0119845cdf8603b8174770cacc7:/test/scripts/1100-Basic-TLS/1160

diff --git a/test/scripts/1100-Basic-TLS/1160 b/test/scripts/1100-Basic-TLS/1160
index ce7298e47..77eef1f06 100644
--- a/test/scripts/1100-Basic-TLS/1160
+++ b/test/scripts/1100-Basic-TLS/1160
@@ -4,6 +4,50 @@
 # For GnuTLS, additionally run the daemon under sudo.
 # Tell wireshark to use DIR/spool/sslkeys for Master Secret log, and decode TCP/1225 as TLS, TLS/1225 as SMTP
 #
+# We get (TLS1.3 , OpenSSL):
+#    SYN		>
+#			< SYN,ACK
+#    ACK		>
+#    Client Hello	>
+#			< Server Hello, Change Ciph, Extensions, Cert, Cert Verify, Finished
+#    Change Ciph,Finsh	>
+#			< Banner
+#    EHLO		>
+#			< EHLO resp
+#    MAIL,RCPT,DATA	>
+#			< ACK,ACK,DATA-go-ahead
+#
+# GnuTLS splits both the server records and the client response pair over two TCP segments:
+#    Client Hello	>
+#			< Server Hello, Change Ciph
+#    Change Ciph	>
+#			< Extensins, Cert, Cert Verify, Finished
+#    Finished		>
+# (otherwise the same).  The extra segments are piplined and do not incur an extra roundtrip time.
+#
+# To see that pipelining:
+# sudo tc qdisc add dev lo root netem delay 50ms  /  sudo tc qdisc delete dev lo root
+#
+# To test TFO, enable in the transport in the conf/ file
+# With TFO we get the Client Hello on the SYN, and the initial Server segment pipelined with/after the SYN,ACK
+# and before the 3rd-ACK.  We still can't merge the 3rd-ACK with the second Client record set,
+# but it does ack the initial Server data.
+#
+# To see the TFO((R):
+# 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 ("[ -e /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec ] && echo 0 > /proc/sys/net/ipv4/tcp_fastopen_blackhole_timeout_sec");
+#system ("ip tcp_metrics delete 127.0.0.1");
+#}
+#
+#****
+#
+#
 # sudo exim -DSERVER=server -d+tls -bd -oX PORT_D
 exim -DSERVER=server -bd -oX PORT_D
 ****