将关闭的用户端关闭,释放服务器内存 所有版本记录:v1.0: TCP聊天服务器套接字|PyQt5+socket(TCP端口映射+端口放行)+logging+Thread(含日志,html)+anaconda打包32位exe(3.4万字)|python高阶v1.1: python TCP套接字服务器v1.1-新增服务端命令功能及修改bug(socket+PyQt5)v1.2
/usr/bin/env pythonfrom __future__ import print_functionfrom bcc import BPFimport argparsefrom time import strftimefrom socket import inet_ntop, AF_INET, AF_INET6from struct import packimport ctypes as ctfrom time import sleepfrom bcc import tcp# argumentsexamples = """examples: ./tcpdrop...
return (struct tcphdr *)(skb->head + skb->transport_header); } static inline struct iphdr *skb_to_iphdr(const struct sk_buff *skb) { // unstable API. verify logic in ip_hdr() -> skb_network_header(). return (struct iphdr *)(skb->head + skb->network_header); } // from incl...
# vm-1$ sudo netstat -anpo | grep -E "Recv-Q|9527" | grep -v LISTENProto Recv-Q Send-Q Local Address Foreign Address State PID/Program name Timertcp 110720 0 10.0.0.3:9527 10.0.0.4:34756 ESTABLISHED 220953/python3 off (0.00/0/0)# vm-2sudo netstat -anpo | grep -E "Recv-Q|...
下面是C#客户端的代码示例,该客户端会连接到上述Python服务器,发送一条消息,然后接收并处理服务器返回的状态码。 using System; using System.IO; using ; using .Sockets; using System.Text; namespace TcpClientApp { class Program { static void Main(string[] args) ...
个状态的 socket 了：# vm-1$ sudo netstat -anpo | grep -E "Recv-Q|9527"Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name Timertcp 110.0.0.3:95270.0.0.0:* LISTEN 23797/python3 off(0.00//)tcp 1 0 10.0.0.3:9527 10....
-ddDump packet-matching code as a C program fragment. 以C语言的形式打印出包匹配码 -dddDump packet-matching code as decimal numbers (preceded with a count). 以十进制数的形式打印出包匹配码(会在包匹配码之前有一个附加的'count'前缀) -DPrint the list of the network interfaces available on the...
PID/Program name:Web 服务的进程 PID 和进程名称为什么是三次握手?不是两次、四次?相信大多数人的回答是:"因为三次握手才能保证双方具有接收和发送的能力",这种回答是没有问题的,但是比较片面,没有说出主要的原因。在前面我们知道了什么是 TCP 连接:用于保证可靠性和流量控制维护的某些状态信息,这些信息的组合(包...
PyTCP is a fully functional TCP/IP stack written in Python. It supports TCP stream-based transport with reliable packet delivery based on a sliding window mechanism and basic congestion control. It also supports IPv6/ICMPv6 protocols with SLAAC address configuration. It operates as a user space ...
这里列一下bcc的工具源码,感兴趣的同学可以自行查阅。如下是针对4.14内核写的,如果是更高版本需要调整一些python与c对照的格式问题。 #!/usr/bin/env python from __future__ import print_function from bcc import BPF import argparse from time import strftime ...