我最近一直在做一个原始数据包的程序。我们最近有一个关于生包的讲座，所以我一直在努力学习和做我的教授告诉我的事情。我的程序有问题，它出现了一个错误，说目标地址是必需的，它是原始的，所以我不想做socket.connect(destaddr)，即使这样可以修复错误。这是我的代码：

下面是类和函数：#not real mac address to protect privacy also removed preamble

class packet(object):

b = ""

def __init__(self, payload):

self.payload = payload

def ether(self):

#preamble = "55555555555555D5"

macdest = "123456789101" #my mac address - needed to remove colons

macsource = "123456789101" #router mac address without colons

ethertype = "0800" #removed 0x because it is not needed

fcs = "" #frame check sequence none so far

frame = macdest+macsource+ethertype

return frame

def ip(self): #in hexadecimal

version = "4" #ipv4 hex

ihl = "5" #header length hex

dscp = "00" #default

ecn = "00" #default

length = "36" #ether-24 + ip-20 + tcp-30 = 54 to hexa = 35

idip="0000" #random id

flags = "40" #dont fragment flag is 2 to hex is 4

offset = "00" #space taker

ttl = "40"#hex(64) = 40

protocol = "06" #for tcp

checksum = "0000"

ipaddrfrom = "c0a8010a"

ipaddrto = "c0a80101"

datagram = version+ihl+dscp+ecn+length+idip+flags+offset+ttl+protocol+checksum+ipaddrfrom+ipaddrto

return datagram

def tcp(self):

portsrc = "15c0" #5568

portdest = "0050" #80

syn = "00000000"

ack = "00000000"

nonce = "80"

fin = "10"

windowscale = "813b"

checksum = "0000"

segment = portsrc+portdest+syn+ack+nonce+fin+windowscale + checksum

return segment

def getpacket(self):

frame = self.ether()

datagram = self.ip()

segment = self.tcp()

payload = self.payload

packet = frame+datagram+segment+payload

a = 0

b = ""

for char in packet:

a = a+1

b = b + char

if a == 4:

b = b + " "

a=0

self.fmtpacket = b

return packet

def raw():

s = socket(AF_INET, SOCK_RAW, IPPROTO_IP)

s.bind(('192.168.1.10', 0))

pckt = packet("")

netpacket = pckt.getpacket()

print "Sending: " + pckt.fmtpacket

print ""

s.sendall(netpacket)

data = s.recv(4096)

print data