def standard_arp_request(dst_ipaddr):
try:
sock = rawsocket.socket(EthernetHeader.TYPE_ARP)
except IOError:
print "Login as root, or you won't be able to make a raw socket"
raise IOError
a = ArpPacket()
eth = a.previous
eth.dst_mac = 0xFFFFFFFFFFFFL
eth.src_mac = my_macaddr
eth.packet_type = EthernetHeader.TYPE_ARP
a.arp_hw = ArpPacket.HW_ETHER
a.ethernet_type = EthernetHeader.TYPE_IP
a.arp_opcode = ArpPacket.OPCODE_REQUEST
a.src_hw_addr = my_macaddr
a.src_prot_addr = my_ipaddr
a.dst_hw_addr = 0xFFFFFFFFFFFFL
a.dst_prot_addr = dst_ipaddr
rawsocket.sendto(sock, a.bytes())
x = rawsocket.recvfrom(sock)
x = a.extract(x)
arptable[dst_ipaddr] = a.src_hw_addr
def test_udp(byte):
if not arptable.has_key(bd_ipaddr):
standard_arp_request(bd_ipaddr)
try:
sock = rawsocket.socket(EthernetHeader.TYPE_IP)
except IOError:
print "Login as root, or you won't be able to make a raw socket"
raise IOError
cmd = "\xff" + ((byte and "\x01") or "\x00")
u = UdpPacket(my_ipaddr, 43700,
bd_ipaddr, 5000, cmd)
print "IP COMMAND TO BOARD"
u.dump()
rawsocket.sendto(sock, u.bytes())
x = rawsocket.recvfrom(sock)
oldtype = u.previous.previous.packet_type
x = u.extract(x)
assert u.previous.previous.packet_type == oldtype
print "\nIP RESPONSE FROM BOARD"
u.dump()
if x:
print len(x), "bytes left over"
def test_arp():
try:
sock = rawsocket.socket(EthernetHeader.TYPE_ARP)
except IOError:
print "Login as root, or you won't be able to make a raw socket"
raise IOError
a = ArpPacket()
eth = a.previous
eth.dst_mac = bd_macaddr
eth.src_mac = my_macaddr
eth.packet_type = EthernetHeader.TYPE_ARP
a.arp_hw = ArpPacket.HW_ETHER
a.ethernet_type = EthernetHeader.TYPE_IP
a.arp_opcode = ArpPacket.OPCODE_REQUEST
a.src_hw_addr = my_macaddr
a.src_prot_addr = my_ipaddr
a.dst_hw_addr = bd_macaddr
a.dst_prot_addr = bd_ipaddr
print "ARP REQUEST"
a.dump()
# Send ARP request, receive ARP reply
rawsocket.sendto(sock, a.bytes())
x = rawsocket.recvfrom(sock)
print "\nARP REPLY"
x = a.extract(x)
a.dump()
if x:
print len(x), "bytes left over"