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