Fix SNAT option in tun/tap vsys scripts

[vsys-scripts.git] / exec / vif_up

diff --git a/exec/vif_up b/exec/vif_up
index 885f1b2..39557df 100755 (executable)
--- a/exec/vif_up
+++ b/exec/vif_up
@@ -154,17 +154,19 @@ cmd_iptables_del_in = "/sbin/iptables -D INPUT -i %s -m mark -m state --state NE
 cmd_iptables_out = "/sbin/iptables -A OUTPUT -o %s -m state --state NEW -m mark ! --mark %d -j DROP" % (vif, sliceid)
 cmd_iptables_del_out = "/sbin/iptables -D OUTPUT -o %s -m state --state NEW -m mark ! --mark %d -j DROP 2>/dev/null" % (vif, sliceid)
 
-public_src = os.popen("ip route get 1.1.1.1 | head -1 | awk '{print $7;}'").read().rstrip();
+public_src = os.popen("ifconfig | grep $(ip route | grep default | awk '{print $3}' | awk -F. '{print $1\"[.]\"$2}') | head -1 | awk '{print $2}' | awk -F : '{print $2}'").read().rstrip()
 cmd_iptables_pr = "/sbin/iptables -t nat -A POSTROUTING -s %s/%d -j SNAT --to-source %s --random" % (vip, vmask, public_src)
-cmd_iptables_del_pr = "/sbin/iptables -t nat -D POSTROUTING -s %s/%d -j SNAT --to-source %s --random" % (vip, vmask, public_src)
+cmd_iptables_del_pr = "/sbin/iptables -t nat -D POSTROUTING -s %s/%d -j SNAT --to-source %s --random > /dev/null 2>&1" % (vip, vmask, public_src)
 
 os.system(cmd_iptables_del_in)
 os.system(cmd_iptables_in)
 os.system(cmd_iptables_del_out)
 os.system(cmd_iptables_out)
 
+# always remove snat rules
+# in case there are leftovers from previous calls
+os.system(cmd_iptables_del_pr)
 if (opt_snat):
-    os.system(cmd_iptables_del_pr)
     os.system(cmd_iptables_pr)
     #print cmd_iptables_del_pr
     #print cmd_iptables_pr