Net.IPv4
data Addr
loopbackAddr
broadcastAddr
type Netmask
netmaskA
netmaskB
netmaskC
defaultNetmask
sameNet
liftA1
liftA2
andAddr
orAddr
complAddr
data Precedence
data Packet content
data TypeOfService
data Flags
skip
template
data Protocol
num_prot
prot_num
data Option
data OptType
data OptClass
ipv4unparse