Can't send Scapy packet over a raw socket in python

Question

A simple client-server raw socket where the client send a custom packet and it will be received from the server.

Here's my code.

Client.py

#!/usr/bin/env python
import socket
import sys
from scapy.all import *
sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW)
try: 
 a=Ether(dst="90:**:**:**:**:75", src="90:**:**:**:**:96")/IP(src="192.168.240.5", dst="192.168.240.1")/TCP(sport=10000,dport=10000)/"HELLO"
a.show()
sendp(a)
finally:
 print >>sys.stderr, 'closing socket'
 sock.close()

Output:

###[ Ethernet ]###
dst = 90:**:**:**:**:75
src = 90:**:**:**:**:96
type = 0x800
###[ IP ]###
 version = 4
 ihl = None
 tos = 0x0
 len = None
 id = 1
 flags = 
 frag = 0
 ttl = 64
 proto = tcp
 chksum = None
 src = 192.168.240.5
 dst = 192.168.240.1
 \options \
###[ TCP ]###
 sport = 10000
 dport = 10000
 seq = 0
 ack = 0
 dataofs = None
 reserved = 0
 flags = S
 window = 8192
 chksum = None
 urgptr = 0
 options = {}
###[ Raw ]###
 load = 'HELLO'
.
Sent 1 packets.
closing socket

Server.py

#!/usr/bin/env python
import socket
import sys
from scapy.all import *
sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW)
sock.bind(("wlan0",10000))
def pkt_callback(pkt):
 pkt.show() # debug statement
while True:
 print >>sys.stderr, 'waiting for a connection'
 sniff(iface="wlan0", prn=pkt_callback, store=0)

The server shows me every packets it intercepts but there's no sign of the one sent by the client.py script. I guess it is not sent at all.

What is the problem?

• scrineym: Do you have a firewall running on your computer , they can intercept sockets sometimes ?
• rebrid: No firewall running.
• Flexo - Save the data dump: Are client and server both the same machine on the network, or two separate machines?
• rebrid: Two separate machines on the same netwrok