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## This file is part of Scapy
## See http://www.secdev.org/projects/scapy for more informations
## Copyright (C) Philippe Biondi <phil@secdev.org>
## This program is published under a GPLv2 license
"""
Common customizations for all Unix-like operating systems other than Linux
"""
import sys,os,struct,socket,time
from fcntl import ioctl
from scapy.error import warning
import scapy.config
import scapy.utils
import scapy.utils6
import scapy.arch
scapy.config.conf.use_pcap = 1
scapy.config.conf.use_dnet = 1
from pcapdnet import *
##################
## Routes stuff ##
##################
def read_routes():
if scapy.arch.SOLARIS:
f=os.popen("netstat -rvn") # -f inet
elif scapy.arch.FREEBSD:
f=os.popen("netstat -rnW") # -W to handle long interface names
else:
f=os.popen("netstat -rn") # -f inet
ok = 0
mtu_present = False
prio_present = False
routes = []
pending_if = []
for l in f.readlines():
if not l:
break
l = l.strip()
if l.find("----") >= 0: # a separation line
continue
if not ok:
if l.find("Destination") >= 0:
ok = 1
mtu_present = l.find("Mtu") >= 0
prio_present = l.find("Prio") >= 0
continue
if not l:
break
if scapy.arch.SOLARIS:
lspl = l.split()
if len(lspl) == 10:
dest,mask,gw,netif,mxfrg,rtt,ref,flg = lspl[:8]
else: # missing interface
dest,mask,gw,mxfrg,rtt,ref,flg = lspl[:7]
netif=None
else:
rt = l.split()
dest,gw,flg = rt[:3]
netif = rt[5+mtu_present+prio_present]
if flg.find("Lc") >= 0:
continue
if dest == "default":
dest = 0L
netmask = 0L
else:
if scapy.arch.SOLARIS:
netmask = scapy.utils.atol(mask)
elif "/" in dest:
dest,netmask = dest.split("/")
netmask = scapy.utils.itom(int(netmask))
else:
netmask = scapy.utils.itom((dest.count(".") + 1) * 8)
dest += ".0"*(3-dest.count("."))
dest = scapy.utils.atol(dest)
if not "G" in flg:
gw = '0.0.0.0'
if netif is not None:
ifaddr = scapy.arch.get_if_addr(netif)
routes.append((dest,netmask,gw,netif,ifaddr))
else:
pending_if.append((dest,netmask,gw))
f.close()
# On Solaris, netstat does not provide output interfaces for some routes
# We need to parse completely the routing table to route their gw and
# know their output interface
for dest,netmask,gw in pending_if:
gw_l = scapy.utils.atol(gw)
max_rtmask,gw_if,gw_if_addr, = 0,None,None
for rtdst,rtmask,_,rtif,rtaddr in routes[:]:
if gw_l & rtmask == rtdst:
if rtmask >= max_rtmask:
max_rtmask = rtmask
gw_if = rtif
gw_if_addr = rtaddr
if gw_if:
routes.append((dest,netmask,gw,gw_if,gw_if_addr))
else:
warning("Did not find output interface to reach gateway %s" % gw)
return routes
############
### IPv6 ###
############
def in6_getifaddr():
"""
Returns a list of 3-tuples of the form (addr, scope, iface) where
'addr' is the address of scope 'scope' associated to the interface
'ifcace'.
This is the list of all addresses of all interfaces available on
the system.
"""
ret = []
i = dnet.intf()
for int in i:
ifname = int['name']
v6 = []
if int.has_key('alias_addrs'):
v6 = int['alias_addrs']
for a in v6:
if a.type != dnet.ADDR_TYPE_IP6:
continue
xx = str(a).split('/')[0]
addr = scapy.utils6.in6_ptop(xx)
scope = scapy.utils6.in6_getscope(addr)
ret.append((xx, scope, ifname))
return ret
def read_routes6():
f = os.popen("netstat -rn -f inet6")
ok = False
mtu_present = False
prio_present = False
routes = []
lifaddr = in6_getifaddr()
for l in f.readlines():
if not l:
break
l = l.strip()
if not ok:
if l.find("Destination") >= 0:
ok = 1
mtu_present = l.find("Mtu") >= 0
prio_present = l.find("Prio") >= 0
continue
# gv 12/12/06: under debugging
if scapy.arch.NETBSD or scapy.arch.OPENBSD:
lspl = l.split()
d,nh,fl = lspl[:3]
dev = lspl[5+mtu_present+prio_present]
else: # FREEBSD or DARWIN
d,nh,fl,dev = l.split()[:4]
if filter(lambda x: x[2] == dev, lifaddr) == []:
continue
if 'L' in fl: # drop MAC addresses
continue
if 'link' in nh:
nh = '::'
cset = [] # candidate set (possible source addresses)
dp = 128
if d == 'default':
d = '::'
dp = 0
if '/' in d:
d,dp = d.split("/")
dp = int(dp)
if '%' in d:
d,dev = d.split('%')
if '%' in nh:
nh,dev = nh.split('%')
if scapy.arch.LOOPBACK_NAME in dev:
cset = ['::1']
nh = '::'
else:
devaddrs = filter(lambda x: x[2] == dev, lifaddr)
cset = scapy.utils6.construct_source_candidate_set(d, dp, devaddrs, scapy.arch.LOOPBACK_NAME)
if len(cset) != 0:
routes.append((d, dp, nh, dev, cset))
f.close()
return routes
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