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#!/usr/bin/python
import fcntl
import os
from socket import * # pylint: disable=wildcard-import
import struct
import unittest
from scapy import all as scapy
SOL_IPV6 = 41
IP_RECVERR = 11
IPV6_RECVERR = 25
IP_TRANSPARENT = 19
IPV6_TRANSPARENT = 75
IPV6_TCLASS = 67
SO_BINDTODEVICE = 25
SO_MARK = 36
IPV6_FLOWLABEL_MGR = 32
IPV6_FLOWINFO_SEND = 33
ETH_P_IPV6 = 0x86dd
SIOCSIFHWADDR = 0x8924
IPV6_FL_A_GET = 0
IPV6_FL_A_PUT = 1
IPV6_FL_A_RENEW = 1
IPV6_FL_F_CREATE = 1
IPV6_FL_F_EXCL = 2
IPV6_FL_S_NONE = 0
IPV6_FL_S_EXCL = 1
IPV6_FL_S_ANY = 255
IPV4_PING = "\x08\x00\x00\x00\x0a\xce\x00\x03"
IPV6_PING = "\x80\x00\x00\x00\x0a\xce\x00\x03"
IPV4_ADDR = "8.8.8.8"
IPV6_ADDR = "2001:4860:4860::8888"
IPV6_SEQ_DGRAM_HEADER = (" sl "
"local_address "
"remote_address "
"st tx_queue rx_queue tr tm->when retrnsmt"
" uid timeout inode ref pointer drops\n")
def SetSocketTimeout(sock, ms):
s = ms / 1000
us = (ms % 1000) * 1000
sock.setsockopt(SOL_SOCKET, SO_RCVTIMEO, struct.pack("LL", s, us))
def SetSocketTos(s, tos):
level = {AF_INET: SOL_IP, AF_INET6: SOL_IPV6}[s.family]
option = {AF_INET: IP_TOS, AF_INET6: IPV6_TCLASS}[s.family]
s.setsockopt(level, option, tos)
def SetNonBlocking(fd):
flags = fcntl.fcntl(fd, fcntl.F_GETFL, 0)
fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
# Convenience functions to create sockets.
def Socket(family, sock_type, protocol):
s = socket(family, sock_type, protocol)
SetSocketTimeout(s, 1000)
return s
def PingSocket(family):
proto = {AF_INET: IPPROTO_ICMP, AF_INET6: IPPROTO_ICMPV6}[family]
return Socket(family, SOCK_DGRAM, proto)
def IPv4PingSocket():
return PingSocket(AF_INET)
def IPv6PingSocket():
return PingSocket(AF_INET6)
def TCPSocket(family):
s = Socket(family, SOCK_STREAM, IPPROTO_TCP)
SetNonBlocking(s.fileno())
return s
def IPv4TCPSocket():
return TCPSocket(AF_INET)
def IPv6TCPSocket():
return TCPSocket(AF_INET6)
def UDPSocket(family):
return Socket(family, SOCK_DGRAM, IPPROTO_UDP)
def IPv6PacketSocket():
return Socket(AF_PACKET, SOCK_DGRAM, htons(ETH_P_IPV6))
def IPv4RawSocket(protocol):
s = Socket(AF_INET, SOCK_RAW, protocol)
s.setsockopt(SOL_IP, IP_HDRINCL, 1)
return s
def GetInterfaceIndex(ifname):
s = IPv4PingSocket()
ifr = struct.pack("16si", ifname, 0)
ifr = fcntl.ioctl(s, scapy.SIOCGIFINDEX, ifr)
return struct.unpack("16si", ifr)[1]
def SetInterfaceHWAddr(ifname, hwaddr):
s = IPv4PingSocket()
hwaddr = hwaddr.replace(":", "")
hwaddr = hwaddr.decode("hex")
if len(hwaddr) != 6:
raise ValueError("Unknown hardware address length %d" % len(hwaddr))
ifr = struct.pack("16sH6s", ifname, scapy.ARPHDR_ETHER, hwaddr)
fcntl.ioctl(s, SIOCSIFHWADDR, ifr)
def SetInterfaceState(ifname, up):
s = IPv4PingSocket()
ifr = struct.pack("16sH", ifname, 0)
ifr = fcntl.ioctl(s, scapy.SIOCGIFFLAGS, ifr)
_, flags = struct.unpack("16sH", ifr)
if up:
flags |= scapy.IFF_UP
else:
flags &= ~scapy.IFF_UP
ifr = struct.pack("16sH", ifname, flags)
ifr = fcntl.ioctl(s, scapy.SIOCSIFFLAGS, ifr)
def SetInterfaceUp(ifname):
return SetInterfaceState(ifname, True)
def SetInterfaceDown(ifname):
return SetInterfaceState(ifname, False)
def FormatProcAddress(unformatted):
groups = []
for i in xrange(0, len(unformatted), 4):
groups.append(unformatted[i:i+4])
formatted = ":".join(groups)
# Compress the address.
address = inet_ntop(AF_INET6, inet_pton(AF_INET6, formatted))
return address
def FormatSockStatAddress(address):
if ":" in address:
family = AF_INET6
else:
family = AF_INET
binary = inet_pton(family, address)
out = ""
for i in xrange(0, len(binary), 4):
out += "%08X" % struct.unpack("=L", binary[i:i+4])
return out
def GetLinkAddress(ifname, linklocal):
addresses = open("/proc/net/if_inet6").readlines()
for address in addresses:
address = [s for s in address.strip().split(" ") if s]
if address[5] == ifname:
if (linklocal and address[0].startswith("fe80")
or not linklocal and not address[0].startswith("fe80")):
# Convert the address from raw hex to something with colons in it.
return FormatProcAddress(address[0])
return None
def GetDefaultRoute(version=6):
if version == 6:
routes = open("/proc/net/ipv6_route").readlines()
for route in routes:
route = [s for s in route.strip().split(" ") if s]
if (route[0] == "00000000000000000000000000000000" and route[1] == "00"
# Routes in non-default tables end up in /proc/net/ipv6_route!!!
and route[9] != "lo" and not route[9].startswith("nettest")):
return FormatProcAddress(route[4]), route[9]
raise ValueError("No IPv6 default route found")
elif version == 4:
routes = open("/proc/net/route").readlines()
for route in routes:
route = [s for s in route.strip().split("\t") if s]
if route[1] == "00000000" and route[7] == "00000000":
gw, iface = route[2], route[0]
gw = inet_ntop(AF_INET, gw.decode("hex")[::-1])
return gw, iface
raise ValueError("No IPv4 default route found")
else:
raise ValueError("Don't know about IPv%s" % version)
def GetDefaultRouteInterface():
unused_gw, iface = GetDefaultRoute()
return iface
def MakeFlowLabelOption(addr, label):
# struct in6_flowlabel_req {
# struct in6_addr flr_dst;
# __be32 flr_label;
# __u8 flr_action;
# __u8 flr_share;
# __u16 flr_flags;
# __u16 flr_expires;
# __u16 flr_linger;
# __u32 __flr_pad;
# /* Options in format of IPV6_PKTOPTIONS */
# };
fmt = "16sIBBHHH4s"
assert struct.calcsize(fmt) == 32
addr = inet_pton(AF_INET6, addr)
assert len(addr) == 16
label = htonl(label & 0xfffff)
action = IPV6_FL_A_GET
share = IPV6_FL_S_ANY
flags = IPV6_FL_F_CREATE
pad = "\x00" * 4
return struct.pack(fmt, addr, label, action, share, flags, 0, 0, pad)
def SetFlowLabel(s, addr, label):
opt = MakeFlowLabelOption(addr, label)
s.setsockopt(SOL_IPV6, IPV6_FLOWLABEL_MGR, opt)
s.setsockopt(SOL_IPV6, IPV6_FLOWINFO_SEND, 1)
# Determine IPv6 configuration.
try:
GetDefaultRoute(version=6)
HAVE_IPV6 = True
except ValueError:
HAVE_IPV6 = False
class NetworkTest(unittest.TestCase):
def assertRaisesErrno(self, err_num, f, *args):
msg = os.strerror(err_num)
self.assertRaisesRegexp(EnvironmentError, msg, f, *args)
if __name__ == "__main__":
unittest.main()
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