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From 80899629519139a7eb86842942a9471d05eb4112 Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Thu, 23 Dec 2021 11:37:00 +0100
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Subject: [PATCH] lib: extract NETWORK_ADDRESS and NETWORK_PREFIX as macros
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The 169.254.0.0/16 network specification (for the appliance) is currently
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duplicated between the direct backend and the libvirt backend. In a
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subsequent patch, we're going to need the network specification in yet
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another spot; extract it now to the NETWORK_ADDRESS and NETWORK_PREFIX
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macros (simply as strings).
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2034160
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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Message-Id: <20211223103701.12702-3-lersek@redhat.com>
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Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
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Tested-by: Richard W.M. Jones <rjones@redhat.com>
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(cherry picked from commit 216de164e091a5c36403f24901698044a43ae0d9)
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---
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lib/guestfs-internal.h | 6 ++++++
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lib/launch-direct.c | 2 +-
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lib/launch-libvirt.c | 3 ++-
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3 files changed, 9 insertions(+), 2 deletions(-)
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diff --git a/lib/guestfs-internal.h b/lib/guestfs-internal.h
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index 8eb2dd3ad..e24d570f5 100644
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--- a/lib/guestfs-internal.h
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+++ b/lib/guestfs-internal.h
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@@ -183,6 +183,12 @@ cleanup_mutex_unlock (pthread_mutex_t **ptr)
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#endif
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#endif
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+/* Network address and network mask (expressed as address prefix) that the
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+ * appliance will see (if networking is enabled).
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+ */
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+#define NETWORK_ADDRESS "169.254.0.0"
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+#define NETWORK_PREFIX "16"
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+
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/* Guestfs handle and associated structures. */
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/* State. */
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diff --git a/lib/launch-direct.c b/lib/launch-direct.c
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index e5b9a5611..4f038f4f0 100644
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--- a/lib/launch-direct.c
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+++ b/lib/launch-direct.c
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@@ -689,7 +689,7 @@ launch_direct (guestfs_h *g, void *datav, const char *arg)
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start_list ("-netdev") {
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append_list ("user");
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append_list ("id=usernet");
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- append_list ("net=169.254.0.0/16");
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+ append_list ("net=" NETWORK_ADDRESS "/" NETWORK_PREFIX);
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} end_list ();
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start_list ("-device") {
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append_list (VIRTIO_DEVICE_NAME ("virtio-net"));
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diff --git a/lib/launch-libvirt.c b/lib/launch-libvirt.c
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index 9e8336938..266d88824 100644
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--- a/lib/launch-libvirt.c
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+++ b/lib/launch-libvirt.c
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@@ -1843,7 +1843,8 @@ construct_libvirt_xml_qemu_cmdline (guestfs_h *g,
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} end_element ();
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start_element ("qemu:arg") {
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- attribute ("value", "user,id=usernet,net=169.254.0.0/16");
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+ attribute ("value",
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+ "user,id=usernet,net=" NETWORK_ADDRESS "/" NETWORK_PREFIX);
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} end_element ();
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start_element ("qemu:arg") {
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--
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2.31.1
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