refactor: order functions by dependency

weaver/weave

@@ -47,6 +47,32 @@ check_command_and_run() {
     fi
 }
 
+run_iptables() {
+    # -w is recent addition to iptables
+    if [ -z "$CHECKED_IPTABLES_W" ] ; then
+        if iptables -S -w >/dev/null 2>&1 ; then
+            IPTABLES_W=-w
+        fi
+        CHECKED_IPTABLES_W=1
+    fi
+
+    iptables $IPTABLES_W "$@"
+}
+
+# Add a rule to iptables, if it doesn't exist already
+add_iptables_rule() {
+    IPTABLES_TABLE="$1"
+    shift 1
+    if ! run_iptables -t $IPTABLES_TABLE -C "$@" >/dev/null 2>&1
+    then
+        run_iptables -t $IPTABLES_TABLE -A "$@" >/dev/null
+    fi
+}
+
+add_nat_rule() {
+    add_iptables_rule nat "$@"
+}
+
 create_bridge() {
     [ ! -d /sys/class/net/$BRIDGE ] && {
         ip link add dev $BRIDGE type bridge
@@ -74,32 +100,6 @@ destroy_bridge() {
     run_iptables -t filter -D FORWARD -i weave -o weave -j ACCEPT 2>/dev/null || true
 }
 
-run_iptables() {
-    # -w is recent addition to iptables
-    if [ -z "$CHECKED_IPTABLES_W" ] ; then
-        if iptables -S -w >/dev/null 2>&1 ; then
-            IPTABLES_W=-w
-        fi
-        CHECKED_IPTABLES_W=1
-    fi
-
-    iptables $IPTABLES_W "$@"
-}
-
-# Add a rule to iptables, if it doesn't exist already
-add_iptables_rule() {
-    IPTABLES_TABLE="$1"
-    shift 1
-    if ! run_iptables -t $IPTABLES_TABLE -C "$@" >/dev/null 2>&1
-    then
-        run_iptables -t $IPTABLES_TABLE -A "$@" >/dev/null
-    fi
-}
-
-add_nat_rule() {
-    add_iptables_rule nat "$@"
-}
-
 setup_masquerading() {
     run_iptables -t nat -N WEAVE >/dev/null 2>&1 || true
     add_nat_rule POSTROUTING -j WEAVE