-# Copyright (c) 2016 Cisco and/or its affiliates.
+# Copyright (c) 2018 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
"""PacketVerifier module.
- :Example:
-
- >>> from scapy.all import *
- >>> from PacketVerifier import *
- >>> rxq = RxQueue('eth1')
- >>> txq = TxQueue('eth1')
- >>> src_mac = "AA:BB:CC:DD:EE:FF"
- >>> dst_mac = "52:54:00:ca:5d:0b"
- >>> src_ip = "11.11.11.10"
- >>> dst_ip = "11.11.11.11"
- >>> sent_packets = []
- >>> pkt_send = Ether(src=src_mac, dst=dst_mac) /
- ... IP(src=src_ip, dst=dst_ip) /
- ... ICMP()
- >>> sent_packets.append(pkt_send)
- >>> txq.send(pkt_send)
- >>> pkt_send = Ether(src=src_mac, dst=dst_mac) /
- ... ARP(hwsrc=src_mac, psrc=src_ip, hwdst=dst_mac, pdst=dst_ip, op=2)
- >>> sent_packets.append(pkt_send)
- >>> txq.send(pkt_send)
- >>> rxq.recv(100, sent_packets).show()
- ###[ Ethernet ]###
- dst = aa:bb:cc:dd:ee:ff
- src = 52:54:00:ca:5d:0b
- type = 0x800
- ###[ IP ]###
- version = 4L
- ihl = 5L
- tos = 0x0
- len = 28
- id = 43183
- flags =
- frag = 0L
- ttl = 64
- proto = icmp
- chksum = 0xa607
- src = 11.11.11.11
- dst = 11.11.11.10
- options
- ###[ ICMP ]###
- type = echo-reply
- code = 0
- chksum = 0xffff
- id = 0x0
- seq = 0x0
- ###[ Padding ]###
- load = 'RT\x00\xca]\x0b\xaa\xbb\xcc\xdd\xee\xff\x08\x06\x00\x01\x08\x00'
+ Example. ::
+
+ | >>> from scapy.all import *
+ | >>> from PacketVerifier import *
+ | >>> rxq = RxQueue('eth1')
+ | >>> txq = TxQueue('eth1')
+ | >>> src_mac = "AA:BB:CC:DD:EE:FF"
+ | >>> dst_mac = "52:54:00:ca:5d:0b"
+ | >>> src_ip = "11.11.11.10"
+ | >>> dst_ip = "11.11.11.11"
+ | >>> sent_packets = []
+ | >>> pkt_send = Ether(src=src_mac, dst=dst_mac) /
+ | ... IP(src=src_ip, dst=dst_ip) /
+ | ... ICMP()
+ | >>> sent_packets.append(pkt_send)
+ | >>> txq.send(pkt_send)
+ | >>> pkt_send = Ether(src=src_mac, dst=dst_mac) /
+ | ... ARP(hwsrc=src_mac, psrc=src_ip, hwdst=dst_mac, pdst=dst_ip, op=2)
+ | >>> sent_packets.append(pkt_send)
+ | >>> txq.send(pkt_send)
+ | >>> rxq.recv(100, sent_packets).show()
+ | ###[ Ethernet ]###
+ | dst = aa:bb:cc:dd:ee:ff
+ | src = 52:54:00:ca:5d:0b
+ | type = 0x800
+ | ###[ IP ]###
+ | version = 4L
+ | ihl = 5L
+ | tos = 0x0
+ | len = 28
+ | id = 43183
+ | flags =
+ | frag = 0L
+ | ttl = 64
+ | proto = icmp
+ | chksum = 0xa607
+ | src = 11.11.11.11
+ | dst = 11.11.11.10
+ | options
+ | ###[ ICMP ]###
+ | type = echo-reply
+ | code = 0
+ | chksum = 0xffff
+ | id = 0x0
+ | seq = 0x0
+ | ###[ Padding ]###
+ | load = 'RT\x00\xca]\x0b\xaa\xbb\xcc\xdd\xee\xff\x08\x06\x00\x01\x08\x00'
+
+ Example end.
"""
-
import os
-import socket
import select
+from scapy.config import conf
from scapy.all import ETH_P_IP, ETH_P_IPV6, ETH_P_ALL, ETH_P_ARP
-from scapy.all import Ether, ARP
from scapy.layers.inet6 import IPv6
+from scapy.layers.l2 import Ether, ARP
+
+# Enable libpcap's L2listen
+conf.use_pcap = True
+import scapy.arch.pcapdnet # pylint: disable=C0413, unused-import
__all__ = ['RxQueue', 'TxQueue', 'Interface', 'create_gratuitous_arp_request',
'auto_pad', 'checksum_equal']
os.system('sudo echo 1 > /proc/sys/net/ipv6/conf/{0}/disable_ipv6'
.format(interface_name))
os.system('sudo ip link set {0} up promisc on'.format(interface_name))
- self._sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW,
- ETH_P_ALL)
- self._sock.bind((interface_name, ETH_P_ALL))
self._ifname = interface_name
:type queue: multiprocessing.Queue
:returns: None
"""
- sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, ETH_P_ALL)
- sock.bind((interface_name, ETH_P_ALL))
+ sock = conf.L2listen(iface=interface_name, type=ETH_P_ALL)
while True:
pkt = sock.recv(0x7fff)
"""
def __init__(self, interface_name):
PacketVerifier.__init__(self, interface_name)
+ self._sock = conf.L2listen(iface=interface_name, type=ETH_P_ALL)
def recv(self, timeout=3, ignore=None, verbose=True):
"""Read next received packet.
:returns: Ether() initialized object from packet data.
:rtype: scapy.Ether
"""
- (rlist, _, _) = select.select([self._sock], [], [], timeout)
- if self._sock not in rlist:
- return None
-
- pkt = self._sock.recv(0x7fff)
- pkt_pad = auto_pad(pkt)
- print'Received packet on {0} of len {1}'.format(self._ifname, len(pkt))
- if verbose:
- Ether(pkt).show2()
- print
-
+ ignore_list = list()
if ignore is not None:
- for i, ig_pkt in enumerate(ignore):
- # Auto pad all packets in ignore list
- ignore[i] = auto_pad(ig_pkt)
for ig_pkt in ignore:
- if ig_pkt == pkt_pad:
- # Found the packet in ignore list, get another one
- # TODO: subtract timeout - time_spent in here
- ignore.remove(ig_pkt)
- return self.recv(timeout, ignore, verbose)
-
- return Ether(pkt)
+ # Auto pad all packets in ignore list
+ ignore_list.append(auto_pad(ig_pkt))
+ while True:
+ (rlist, _, _) = select.select([self._sock], [], [], timeout)
+ if self._sock not in rlist:
+ return None
+
+ pkt = self._sock.recv(0x7fff)
+ pkt_pad = auto_pad(pkt)
+ print 'Received packet on {0} of len {1}'\
+ .format(self._ifname, len(pkt))
+ if verbose:
+ pkt.show2() # pylint: disable=no-member
+ print
+ if pkt_pad in ignore_list:
+ ignore_list.remove(pkt_pad)
+ print 'Received packet ignored.'
+ continue
+ else:
+ return pkt
class TxQueue(PacketVerifier):
"""
def __init__(self, interface_name):
PacketVerifier.__init__(self, interface_name)
+ self._sock = conf.L2socket(iface=interface_name, type=ETH_P_ALL)
def send(self, pkt, verbose=True):
"""Send packet out of the bound interface.
Code Review / csit.git / blobdiff