解决网络地址和端口被占用的解决方法

发布: 2007-6-08 22:43 | 作者: seanhe | 来源: | 查看: 55次 | 进入软件测试论坛讨论

您是否遇到过网络地址和端口号被占用的情况？如果能找到占用该地址和端口号的进程并终止它，从而释放该网络地址和端口号，问题岂不就得到解决了吗？有关具体的操作，请参阅以下
Q: How do I find out what process is associated with a socket connection (a .network address and port number)?
------------------------------------------------------------------

There are several ways to accomplish this (lsof, pfiles, crash):

A1. Use lsof  which is available on the net from several locations:
  ftp://vic.cc.purdue.edu/pub/tools/unix/lsof/lsof.tar.Z
  http://www.sunfreeware.com/programlistsparc7.html#lsof64
  http://www.sunfreeware.com/programlistsparc8.html#lsof
  http://sunsite.doc.ic.ac.uk/sun/Solaris/freeware

lsof examples:

Ex: netstat -a shows a connection between hodware port 36169 to ravin port 23
lsof shows the PID owner of the telnet connection.
example1# netstat -a
...
hodware.36169     ravin.telnet  8760      0  8760      0 ESTABLISHED

# lsof -i TCP@hodware:36169
COMMAND  PID   USER   FD   TYPE     DEVICE SIZE/OFF INODE NAME
telnet  2686 steve    6u  inet 0x709f21e8      0t0   TCP hodware:36169->ravin:telnet (ESTABLISHED)

Ex: netstat -an shows a connection in close_wait.

lsof showd the PID and process associated with that port.

example2# netstat -an |grep CLOSE_WAIT
  10.10.192.103.58046 10.10.37.122.44788 24820    0 24820      0 CLOSE_WAIT

  # /usr/local/bin/lsof -i | grep 44788
  netscape  27096 steve   34u  inet 0x300039bf760  0t0  TCP hodware:58046->nop:44788 (CLOSE_WAIT)

  # ps -elf |grep 27096
   8 S  steve 27096 19185  0 51 20 ? 9307 ? Feb 18 pts/19  50:03 /opt/netscape/netscape

example3# netstat -an |grep 7100
*.7100               *.*                0      0     0      0 LISTEN
  # /usr/local/bin/lsof -i TCP:7100
  COMMAND  PID USER   FD   TYPE        DEVICE SIZE/OFF NODE NAME
  inetd   4512 root   33u  inet 0x300014ef750      0t0  TCP *:fs (LISTEN)

to list all ports with a process:

example4# lsof -i -P | grep snmpdx

snmpdx 5771 root 4u inet 0x60f5add0 0t0 UDP *:161 (Idle)

snmpdx 5771 root 5u inet 0x60ded648 0t0 UDP *:38725 (Idle)

snmpdx 5771 root 6u inet 0x61101358 0t0 UDP *:38726 (Idle)

#

to list all TCP connections
example5# /usr/local/bin/lsof -i TCP

note: lsof is not supported by Sun Enterprise Services, so you are on your own
  as far as obtaining it, compiling it and running it and any problems you may encounter.

________________
A2. or use Solaris 8 pfiles
Solaris 8 added new feature to display socketname using pfiles tool.
see proc(1) and below example.

solaris 8 pfiles methods :
example5# cd /proc ; /usr/proc/binpfiles * | egrep "^[0-9]|sockname" | more
....
968:    in.ftpd
     sockname: AF_INET6 ::ffff:10.1.1.77  port: 21
     sockname: AF_INET6 ::ffff:10.1.1.77  port: 21
or
example6# su
# cd /proc
# /usr/proc/bin/pfiles * > /tmp/pfiles.out
# vi /tmp/pfiles.out
/port: PortOfInterest
?^[0-9]

________________

A3. if you are resourceful enough, use adb or crash to trace down each open file descriptor
that a process owns, but there is no way to go in the reverse direction so this would be extremely
time consuming and tedious.

C.Arthur 回复于：2004-02-26 11:28:24

好文，验证过了吗

xieliangcheng 回复于：2004-02-26 11:46:17