gnu: knot: Fix test failure on aarch64-linux.

* gnu/packages/dns.scm (knot)[source]: Apply patch from upstream that
helps ensure the "test_net_shortwrite" test suite can complete
regardless of platform or configuration.
* gnu/packages/patches/knot-test_net_shortwrite-ensure-connection.patch:
New file.
* gnu/local.mk (dist_patch_DATA): Add it.

Signed-off-by: Tobias Geerinckx-Rice <me@tobias.gr>

1 files changed, 19 insertions, 0 deletions

diff --git a/gnu/packages/patches/knot-test_net_shortwrite-ensure-connection.patch b/gnu/packages/patches/knot-test_net_shortwrite-ensure-connection.patch
new file mode 100644
index 0000000000..8b57ec522e
--- /dev/null
+++ b/gnu/packages/patches/knot-test_net_shortwrite-ensure-connection.patch
@@ -0,0 +1,19 @@
+This patch duplicates upstream commit 4144d1e, which helps ensure the
+"test_net_shortwrite" test suite can succeed across all platforms by
+deepening the pending-connection queue of the server it creates from 0
+to 1.
+
+See the original report at
+https://gitlab.nic.cz/knot/knot-dns/-/issues/693
+
+--- a/tests/contrib/test_net_shortwrite.c
++++ b/tests/contrib/test_net_shortwrite.c
+@@ -88,7 +88,7 @@ int main(int argc, char *argv[])
+	int server = net_bound_socket(SOCK_STREAM, &addr, 0);
+	ok(server >= 0, "server: bind socket");
+
+-	r = listen(server, 0);
++	r = listen(server, 1);
+	ok(r == 0, "server: start listening");
+
+	struct sockaddr *sa = (struct sockaddr *)&addr;