Question

我试图为实践创建第2层protocole。有我的导入（在两个文件中）：

from pystack.layers.ethernet import EthernetProtocol
from pystack.layers.arp import ARPProtocol
from pystack.layers.ethernet import Ether
from scapytrame import EtherData
from scapy.all import *

当我在文件中执行这些行（Sender.py）

时，它非常有效

ethData = EtherData(src="00:21:70:a2:b7:6d", dst="d4:3d:7e:6c:66:e9", data="Kikouuu!", seq_ack=9)
sendp(ethData)
print ethData.show()

所以我收到了数据包，我可以在WireShark中看到它但现在我想通过使用一个函数来做到这一点并不起作用。有第二个文件：

def sender(frames, macSrc="00:21:70:a2:b7:6d", iface="eth0") :
    i = 0
    sentBack = False
    while(i < len(frames)):

        # Sending packet
        frames[i].seq_ack = hex(i%2);
        frames[i].show()
        Scapy.sendp(frames[i])

        # Acknowledge + Next packet
        macDst = frames[i].dst
        filtre = "ether src " + macDst
        ack = sniff(iface=str(iface), filter=str(filtre), count=1, timeout=5)
        if not ack:
            sentBack = True
            continue
        ackData = EtherData(str(ack[0]))
        if int(ackData.seq_ack) == 2:
            sentBack = False
            i = i + 1
        else:
            continue

def receiver(macSrc="00:21:70:a2:b7:6d", iface="eth0") :
    nextFrame = 0
    while(True):
        ack = sniff(iface=str(iface), filter=str(filtre), count=1)
        ackData = EtherData(str(ack[0]))
        if int(ackData.seq_ack) == nextFrame%2:
            ackData.show()
            sender([EtherData(src="00:21:70:a2:b7:6d", dst=ackData.dst, seq_ack=2)])
            nextFrame = nextFrame + 1

frames_test = [ EtherData(src="00:21:70:a2:b7:6d", dst="d4:3d:7e:6c:66:e9", data="Kikouuu!", seq_ack=9),
            EtherData(src="00:21:70:a2:b7:6d", dst="d4:3d:7e:6c:66:e9", data="Kikouuu!", seq_ack=9),
            EtherData(src="00:21:70:a2:b7:6d", dst="d4:3d:7e:6c:66:e9", data="Kikouuu!", seq_ack=9),
            EtherData(src="00:21:70:a2:b7:6d", dst="d4:3d:7e:6c:66:e9", data="Kikouuu!", seq_ack=9),
            EtherData(src="00:21:70:a2:b7:6d", dst="d4:3d:7e:6c:66:e9", data="Kikouuu!", seq_ack=9)]

sender(frames_test)

然后我收到错误：

Traceback (most recent call last):
  File "ProtAckPosAndTrans.py", line 47, in <module>
    sender(frames_test)
  File "ProtAckPosAndTrans.py", line 15, in sender
    sendp(frames[i])
  File "/usr/lib/python2.7/dist-packages/scapy/sendrecv.py", line 259, in sendp
    __gen_send(conf.L2socket(iface=iface, *args, **kargs), x, inter=inter, loop=loop, count=count, verbose=verbose, realtime=realtime)
  File "/usr/lib/python2.7/dist-packages/scapy/sendrecv.py", line 234, in __gen_send
    s.send(p)
  File "/usr/lib/python2.7/dist-packages/scapy/supersocket.py", line 32, in send
    sx = str(x)
  File "/usr/lib/python2.7/dist-packages/scapy/packet.py", line 261, in __str__
    return self.build()
  File "/usr/lib/python2.7/dist-packages/scapy/packet.py", line 319, in build
    p = self.do_build()
  File "/usr/lib/python2.7/dist-packages/scapy/packet.py", line 308, in do_build
    pkt = self.self_build()
  File "/usr/lib/python2.7/dist-packages/scapy/packet.py", line 299, in self_build
    p = f.addfield(self, p, val)
  File "/usr/lib/python2.7/dist-packages/scapy/fields.py", line 70, in addfield
    return s+struct.pack(self.fmt, self.i2m(pkt,val))
struct.error: cannot convert argument to integer

帧[i] .show（）完美运行，我也做了一个＆＃39;打印帧[i]。类＆＃39;一切都找到了...所以我无法理解为什么它不起作用。

我到处搜索都无法找到一个anwser。谢谢你的回答：）

在具有scapy库的函数中调用函数不起作用。但是如果没有功能则可以工作

0 个答案: