Actually implement the socket option.
---
tests/Makefile.am | 2 ++
server/sockets.c | 12 +++++++++++
tests/test-tfo-unix.sh | 45 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 59 insertions(+)
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 4bf9a4568f..dc5b6c9a6c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -313,6 +313,7 @@ TESTS += \
test-timeout-cancel.sh \
test-keepalive.sh \
test-tfo-default.sh \
+ test-tfo-unix.sh \
$(NULL)
if !IS_WINDOWS
TESTS += \
@@ -371,6 +372,7 @@ EXTRA_DIST += \
test-stdio.sh \
test-swap.sh \
test-tfo-default.sh \
+ test-tfo-unix.sh \
test-timeout.sh \
test-timeout.py \
test-timeout-cancel.sh \
diff --git a/server/sockets.c b/server/sockets.c
index 348da029a9..07b0cf4787 100644
--- a/server/sockets.c
+++ b/server/sockets.c
@@ -229,6 +229,18 @@ bind_tcpip_socket (sockets *socks)
if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof opt) == -1)
perror ("setsockopt: SO_REUSEADDR");
+ if (fastopen) {
+ /* 5 is what dnsmasq uses. I've also seen 1 being used here.
+ * The manpages documentation says this is the maximum length of
+ * the SYN packet, which is wrong.
+ */
+ const int qlen = 5;
+
+ if (setsockopt (sock, IPPROTO_TCP, TCP_FASTOPEN,
+ &qlen, sizeof qlen) == -1)
+ perror ("setsockopt: TCP_FASTOPEN");
+ }
+
#ifdef IPV6_V6ONLY
if (a->ai_family == PF_INET6) {
if (setsockopt (sock, IPPROTO_IPV6, IPV6_V6ONLY, &opt, sizeof opt) == -1)
diff --git a/tests/test-tfo-unix.sh b/tests/test-tfo-unix.sh
new file mode 100755
index 0000000000..36306d8b6d
--- /dev/null
+++ b/tests/test-tfo-unix.sh
@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+# nbdkit
+# Copyright Red Hat
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# * Neither the name of Red Hat nor the names of its contributors may be
+# used to endorse or promote products derived from this software without
+# specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+# Test the --tfo and --no-tfo options do nothing for non-supported
+# Unix sockets.
+
+source ./functions.sh
+set -e
+set -x
+
+requires_run
+requires_plugin null
+requires_nbdinfo
+
+nbdkit --tfo null --run 'nbdinfo "$uri"'
+nbdkit --no-tfo null --run 'nbdinfo "$uri"'
--
2.46.0
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