CheckIP function: Difference between revisions
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== Description == | |||
'''Requires:''' [[Dotted Comparison Script|VersionCheck function]]. | |||
Checks an IP to see if it is: | |||
*an Internet IP address (IP address used when connected to the Internet). | |||
*a Network IP address (IP address used by routers to identify a computer connected to LAN). | |||
*an automatic private IP address (IP address used when there is no DHCP server available and you connect to the Internet). | |||
*a LoopBack IP (IP used when not connected to the Internet to identify the computer itself). | |||
== How to use == | == How to use == |
Revision as of 10:42, 3 July 2010
Description
Requires: VersionCheck function.
Checks an IP to see if it is:
- an Internet IP address (IP address used when connected to the Internet).
- a Network IP address (IP address used by routers to identify a computer connected to LAN).
- an automatic private IP address (IP address used when there is no DHCP server available and you connect to the Internet).
- a LoopBack IP (IP used when not connected to the Internet to identify the computer itself).
How to use
Syntax
Push "89.165.74.146" Call CheckIP Pop "ResultVar" Pop "ResultIPAddress" ;= value of "IPAddress"
Parameters
- ResultVar
- Variable where the type of the IP address is returned. List of IP addresses types:
- 1 - LoopBack IP.
- 2 - Automatic Private IP Address.
- 3 - Network IP.
- 4 - Internet IP.
- ResultIPAddress
- Variable where the "IPAddress" parameter value is returned.
- IPAddress
- IP address to be checked for its type.
Example
Push "127.0.0.1" Call CheckIP Pop $0 ;$0 = "1"
Function code
; Function CheckIP ; input: IP-address on stack ; output: additional entry on stack ; 1 - LoopBack IP (localhost, indicates no connection to a LAN or to the internet). ; 2 - Automatic Private IP Address (no DHCP server). ; 3 - Network IP. ; 4 - Internet IP. ; Eg: ; Push '192.168.0.100' ; Call CheckIP ; Pop $0 ; Contains '3' ; Pop $1 ; Contains '192.168.0.100' Function CheckIP Exch $0 Push $1 ; Check 127.x.x.x Push '127.0.0.0' Push $0 Call VersionCheck Pop $1 StrCmp $1 2 '' Range1 ; IP cannot be in range of LoopBack addresses Push '127.255.255.255' Push $0 Call VersionCheck Pop $1 StrCmp $1 1 LoopBack ; We found a LoopBack IP ; Check 10.x.x.x Range1: Push '10.0.0.0' Push $0 Call VersionCheck Pop $1 StrCmp $1 2 '' Range2 ; IP cannot be in range 1 Push '10.255.255.255' Push $0 Call VersionCheck Pop $1 StrCmp $1 1 LanIp ; We found a LanIp ; Check 172.16.x.x to 172.31.x.x Range2: Push '172.16.0.0' Push $0 Call VersionCheck Pop $1 StrCmp $1 2 '' Range3 ; IP cannot be in range 2 Push '172.31.255.255' Push $0 Call VersionCheck Pop $1 StrCmp $1 1 LanIp ; We found a LanIp ; Check 192.168.x.x Range3: Push '192.168.0.0' Push $0 Call VersionCheck Pop $1 StrCmp $1 2 '' Range4 ; IP cannot be in range 3 Push '192.168.255.255' Push $0 Call VersionCheck Pop $1 StrCmp $1 1 LanIp ; We found a LanIp ; Check 169.254.x.x Range4: Push '169.254.0.0' Push $0 Call VersionCheck Pop $1 StrCmp $1 2 '' InternetIp ; It should be an internet IP Push '169.254.255.255' Push $0 Call VersionCheck Pop $1 StrCmp $1 1 APA ; We found an Automatic Private IP Address Goto InternetIp ; Remaining addresses are internet IPs LoopBack: StrCpy $1 1 Goto Exit APA: StrCpy $1 2 Goto Exit LanIp: StrCpy $1 3 Goto Exit InternetIp: StrCpy $1 4 Exit: Exch $1 Exch 1 Exch $0 Exch 1 FunctionEnd