# a malformed 'runt' packet
# created by a mis-constructed SA
- if (ESP == self.encryption_type):
+ if (ESP == self.encryption_type and p.crypt_algo != "NULL"):
bogus_sa = SecurityAssociation(self.encryption_type,
p.vpp_tra_spi)
pkt = (Ether(src=self.tra_if.remote_mac,