import pwd
import os
import re
-
+import string
if len(sys.argv) != 2: sys.exit(1)
sliceid = pwd.getpwnam(slicename).pw_uid
-# Read interface name
-vif = sys.stdin.readline().strip() # interface name
+arglines = map(string.strip, sys.stdin.readlines())
+
+if len(arglines)<1:
+ print >>sys.stderr, "Insufficient argument lines."
+ sys.exit(1)
+
+vif = arglines[0] # interface name
+
+# Create options list
+if len(arglines)>1:
+ options = arglines[1:]
+else:
+ options = []
+opt_delete = False
+
+for optionline in options:
+ if len(optionline)==0: continue
+ try:
+ opt, val = optionline.split('=')
+ except:
+ print >>sys.stderr, "Bad option line: \"%s\"" % (optionline)
+ sys.exit(1)
+
+ if opt=="delete":
+ if val=="0":
+ opt_delete=False
+ elif val=="1":
+ opt_delete=True
+ else:
+ print >>sys.stderr, "rp_filter value invalid: \"%s\"" % (val)
+ sys.exit(1)
+ else:
+ print >>sys.stderr, "Unknown option: \"%s\"" % (opt)
+ sys.exit(1)
# Validate interface name
if len(vif)>16:
-# Bring interface down
-
-cmd_ifconfig = "/sbin/ifconfig %s down" % (vif)
-os.system(cmd_ifconfig)
-
# Remove iptables rules
-cmd_iptables_del_in = "/sbin/iptables -D INPUT -i %s -m mark ! --mark %d -j DROP 2>/dev/null" % (vif, sliceid)
-cmd_iptables_del_out = "/sbin/iptables -D OUTPUT -o %s -m mark ! --mark %d -j DROP 2>/dev/null" % (vif, sliceid)
+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_del_in = "/sbin/iptables -D INPUT -i %s -m mark -m state --state NEW ! --mark %d -j DROP 2>/dev/null" % (vif, sliceid)
+cmd_iptables_del_out = "/sbin/iptables -D OUTPUT -o %s -m mark -m state --state NEW ! --mark %d -j DROP 2>/dev/null" % (vif, sliceid)
+cmd_iptables_del_pr = "/sbin/iptables -t nat -D POSTROUTING -s $(ip ro | grep 'dev %s' | head -1 | awk '{print $1}') -j SNAT --to-source %s --random 2>/dev/null" % (vif, public_src,)
+cmd_gre_del = "ip link del %s 2>/dev/null" % (vif,)
+cmd_iptables_del_gre_pr = "/sbin/iptables -t mangle -D INPUT -i %s -m mark --mark 0 -j MARK --set-mark %s 2>/dev/null" % (vif, sliceid)
os.system(cmd_iptables_del_in)
os.system(cmd_iptables_del_out)
+os.system(cmd_iptables_del_pr)
+os.system(cmd_iptables_del_gre_pr)
+
+# Bring interface down
+cmd_ifconfig = "/sbin/ifconfig %s down" % (vif)
+os.system(cmd_ifconfig)
+
+# Delete GRE tunnel (if any)
+if (opt_delete):
+ os.system(cmd_gre_del)