1 files changed, 36 insertions, 0 deletions
diff --git a/files/common/etc/fsm/update/common.sh b/files/common/etc/fsm/update/common.sh
new file mode 100644
index 0000000..8218dd5
--- /dev/null
+++ b/files/common/etc/fsm/update/common.sh
@@ -0,0 +1,36 @@
+Tbl=/tmp/p2ptbl/update
+TblIf=br-mesh
+FwDir=/tmp/firmware
+
+# updates global state using current internal state; implicit
+# definition of the table format
+GS_update () {
+    p2ptbl update $Tbl "$NodeId" "$CurFw\t$TargetFw\t$TargetTime\t$AckTime" $TblIf
+}
+
+# assemble internal state
+CurState=$1
+CurTime=$(date +%s)
+NodeId=$(cat /proc/sys/kernel/random/boot_id) # TODO: replace with stable machine id
+CurFw="$(cat /etc/firmware)"
+[ -n "$NodeId" -a -n "$CurFw" ]
+
+# get current global state from p2ptable
+p2ptbl init $Tbl
+GS=$(p2ptbl get $Tbl $NodeId)
+if [ -n "$GS" ]; then
+    GSCurFw=$(   echo "$GS" | cut -f1)
+    TargetFw=$(  echo "$GS" | cut -f2)
+    TargetTime=$(echo "$GS" | cut -f3)
+    AckTime=$(   echo "$GS" | cut -f4)
+    # update stale firmware entries .. should only happen after manual
+    # edit of /etc/firmware
+    [ "$CurFw" == "$GSCurFw" ] || GS_update
+else
+    # no entry exists -> create one
+    TargetFw=""
+    TargetTime=""
+    AckTime=""
+    GS_update
+fi
+FwDst=$FwDir/$TargetFw