检查在 linux 操作系统中打开的所有套接字
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check all socket opened in linux OS
提问by stack_A
My program opens a socket with this function:
我的程序用这个函数打开一个套接字:
sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)
sockfd = 套接字(AF_INET、SOCK_RAW、IPPROTO_ICMP)
After finish sending data the socket is closed:
完成发送数据后,套接字关闭:
close(sockfd);
关闭(sockfd);
But the issue is when the program doesn't run well and is blocking. Thereby the socket will not be closed.
但问题是当程序运行不佳并且阻塞时。从而不会关闭套接字。
How can I check all sockets opened under Linux OS ?
如何检查 Linux 操作系统下打开的所有套接字?
采纳答案by Chankey Pathak
/proc/net/tcp -a list of open tcp sockets
/proc/net/udp -a list of open udp sockets
/proc/net/raw -a list all the 'raw' sockets
/proc/net/tcp - 打开的 tcp 套接字列表
/proc/net/udp - 打开的 udp 套接字列表
/proc/net/raw -a 列出所有“原始”套接字
These are the files, use cat
command to view them. For example:
这些是文件,使用cat
命令查看它们。例如:
cat /proc/net/tcp
cat /proc/net/tcp
You can also use the lsof
command.
您也可以使用该lsof
命令。
lsof is a command meaning "list open files", which is used in many Unix-like systems to report a list of all open files and the processes that opened them.
lsof 是一个命令,意思是“列出打开的文件”,在许多类 Unix 系统中使用它来报告所有打开文件的列表以及打开它们的进程。
回答by Nithin Bhaskar
You can use netstatcommand
您可以使用netstat命令
netstat --listen
netstat --listen
To display open ports and established TCP connections,
要显示打开的端口和已建立的 TCP 连接,
netstat -vatn
netstat -vatn
To display only open UDP ports try the following command:
要仅显示打开的 UDP 端口,请尝试以下命令:
netstat -vaun
netstat -vaun
回答by Sasha Zezulinsky
Also you can use ssutility to dump sockets statistics.
您也可以使用ss实用程序来转储套接字统计信息。
To dump summary:
转储摘要:
ss -s
Total: 91 (kernel 0)
TCP: 18 (estab 11, closed 0, orphaned 0, synrecv 0, timewait 0/0), ports 0
Transport Total IP IPv6
* 0 - -
RAW 0 0 0
UDP 4 2 2
TCP 18 16 2
INET 22 18 4
FRAG 0 0 0
To display all sockets:
显示所有套接字:
ss -a
To display UDP sockets:
显示 UDP 套接字:
ss -u -a
To display TCP sockets:
显示 TCP 套接字:
ss -t -a
Here you can read ss man: ss
在这里你可以读到 ss man: ss