tcpdump servaddr.sin_addr.s_addr=htonl(8080)

This command is not valid.

"servaddr.sin_addr.s_addr=htonl(8080)" is not a valid filter expression for tcpdump.

If you want to capture traffic on port 8080, you can use the following command:

tcpdump port 8080

This will capture all traffic that is sent to or from port 8080.

相关问题

tcpdump servaddr.sin_addr.s_addr=htonl()

This command is incomplete and does not make sense. It appears to be an attempt to use the tcpdump command to capture network traffic based on the source or destination IP address, but it is missing important information such as the interface to capture on and the protocol to filter on. The use of htonl() suggests that the command may be attempting to convert the IP address to network byte order, but it is not clear what IP address is being used or why it needs to be converted. More information is needed to provide a complete and accurate answer.

Traceback (most recent call last): File "<console>", line 1, in <module> File "/usr/lib/python2.7/dist-packages/scapy/sendrecv.py", line 354, in sr1 s=conf.L3socket(filter=filter, nofilter=nofilter, iface=iface) File "/usr/lib/python2.7/dist-packages/scapy/arch/linux.py", line 324, in __init__ self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type)) File "/usr/lib/python2.7/socket.py", line 191, in __init__ _sock = _realsocket(family, type, proto) error: [Errno 1] Operation not permitted

这个错误提示意味着你的程序在尝试创建一个Scapy的L3socket套接字时出现了权限问题。在Linux系统中，需要以root权限运行程序才能够创建原始套接字，否则会出现 "Operation not permitted" 的错误。

为了解决这个问题，你可以尝试以下几种方法：

1. 以root权限运行程序，比如使用 sudo 命令来运行程序。

2. 将你的用户添加到 "wireshark" 用户组中，该用户组允许你使用原始套接字而无需root权限。你可以使用以下命令将你的用户添加到 "wireshark" 组中：

   sudo usermod -aG wireshark $USER

然后重新登录或者重启系统使更改生效。

3. 如果你不想以root权限运行程序，也不想将你的用户添加到 "wireshark" 用户组中，可以使用 tcpdump 来捕获数据包，然后使用 Scapy 来解析数据包。具体来说，可以使用以下命令来捕获数据包：

   sudo tcpdump -i eth0 -w capture.pcap

然后使用 Scapy 来解析数据包：

   from scapy.all import *
   
   packets = rdpcap('capture.pcap')
   
   for packet in packets:
       # 处理数据包
       pass

希望这些方法能够帮助你解决这个问题。