1:得到客户端的IP地址
/************* IP **************/
declare @ip varchar(20),@hst varchar(20),@sql varchar(100)
declare @str varchar(100)
set @str=\'PING \'+Host_Name()
create table #tmp(aa varchar(200))
insert #tmp exec master..xp_cmdshell @str
select top 1 @ip = replace(left(aa,charindex(\':\',aa)-1),\'Reply from \',\'\')
from #tmp where aa like \'reply from %:%\'
drop table #tmp
select @ip


2:得到网卡的物理地址
create table #tb(re varchar(255))
insert into #tb exec master..xp_cmdshell \'ipconfig /all\'

select 网卡物理地址=substring(re,charindex(\':\',re)+1,255) from #tb where re like \'%Physical Address. . . . . . . . . :%\'

drop table #tb

3: 将IP地址段转成每三位用点号分开
create function getIP(@a varchar(15))
returns varchar(15)
As
begin
declare @s varchar(15)
set @s = \'\'
while charindex(\'.\',@a) > 0
begin
set @s = @s + right(\'000\' + left(@a,charindex(\'.\',@a)),4)
set @a = right(@a,len(@a)-charindex(\'.\',@a))
end
set @s = @s + right(\'000\' + @a,3)
return @s
end

/*
Select dbo.getIP(\'202.1.110.2\')
---------------
202.001.110.002

（所影响的行数为 1 行）
*/
--drop function getIP