commit 0cd7ddf017ddc74b5067fb664bb77e888019a4b5
author William A. Kennington III <wak@google.com> Fri Aug 02 01:22:23 2024 -0700
committer William A. Kennington III <wak@google.com> Fri Aug 09 07:00:54 2024 +0000
tree 9ecf3b5c1b4906ecbb0d2dfdd61dd8dc74e56c9f
parent f7f2394a1536c1a6814399fdea7f674fbe1e0ec4

meta-google: gbmc-bridge: Send hostname in RAs

This adds support for a process that monitors hostname changes and adds
the current hostnmae as a "DNS Search List" field entry in the RA
messages from a node. This makes it possible to discover the hostnames
of nodes within the machine simply by looking at RA messages.

Tested: Ran on a machine and verified with `rdisc6 gbmcbr` that the
hostname was being included in RA messages and updated after
`hostnamectl set-hostname <new name>`

Change-Id: Iac8ee6300384191f4fb8ec3bf252afe84ef814c0
Signed-off-by: William A. Kennington III <wak@google.com>

meta-google/recipes-google/networking/gbmc-bridge.bb

diff --git a/meta-google/recipes-google/networking/gbmc-bridge.bb b/meta-google/recipes-google/networking/gbmc-bridge.bb
index 3f20530..ba4b691 100644
--- a/meta-google/recipes-google/networking/gbmc-bridge.bb
+++ b/meta-google/recipes-google/networking/gbmc-bridge.bb
@@ -17,6 +17,8 @@
   file://gbmc-br-from-ra.sh \
   file://gbmc-br-ensure-ra.sh \
   file://gbmc-br-ensure-ra.service \
+  file://gbmc-br-hostname.sh \
+  file://gbmc-br-hostname.service \
   file://gbmc-br-gw-src.sh \
   file://gbmc-br-nft.sh \
   file://gbmc-br-dhcp.sh \
@@ -49,6 +51,7 @@
 
 SYSTEMD_SERVICE:${PN} += " \
   gbmc-br-ensure-ra.service \
+  gbmc-br-hostname.service \
   gbmc-br-dhcp.service \
   gbmc-br-dhcp-term.service \
   gbmc-br-load-ip.service \
@@ -123,10 +126,12 @@
 
   install -d -m0755 ${D}${libexecdir}
   install -m0755 ${WORKDIR}/gbmc-br-ensure-ra.sh ${D}${libexecdir}/
+  install -m0755 ${WORKDIR}/gbmc-br-hostname.sh ${D}${libexecdir}/
   install -m0755 ${WORKDIR}/gbmc-br-dhcp.sh ${D}${libexecdir}/
   install -m0755 ${WORKDIR}/gbmc-br-dhcp-term.sh ${D}${libexecdir}/
   install -d -m0755 ${D}${systemd_system_unitdir}
   install -m0644 ${WORKDIR}/gbmc-br-ensure-ra.service ${D}${systemd_system_unitdir}/
+  install -m0644 ${WORKDIR}/gbmc-br-hostname.service ${D}${systemd_system_unitdir}/
   install -m0644 ${WORKDIR}/gbmc-br-dhcp.service ${D}${systemd_system_unitdir}/
   install -m0644 ${WORKDIR}/gbmc-br-dhcp-term.service ${D}${systemd_system_unitdir}/
   install -m0644 ${WORKDIR}/gbmc-br-load-ip.service ${D}${systemd_system_unitdir}/