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Re: Ip address of VPN

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Re: Ip address of VPN

Subject: Re: Ip address of VPN
From: Quinn <email@hidden>
Date: Tue, 22 Dec 2009 09:35:42 +0000

At 12:46 +0530 22/12/09, Vasavi Mahadev wrote:

I am trying to read the address from the below location:
/Leopard/Library/Preferences/SystemConfiguration/preferences.list/NetworkServices/IPv4

 using the following  API:
(NSArray*)SCDynamicStoreCopyKeyList(dynamicStore,(CFStringRef)@"State:/Network/Service/[^/]+/IPv4");

Actually, these are not related. The file you mention would be accessed to by the System Configuration framework preferences API (SCPreferences). The call you mention is part of the System Configuration framework dynamic store API (SCDynamicStore). The dynamic store only exists in memory, and it's used to hold the current networking of the machine.

I'm not sure why your VPN IP address isn't showing up in the dynamic store. I don't have a Cisco VPN set up to try this out, but I tested the equivalent situation with the Apple VPN and it worked as expected. I tested this with <x-man-page://8/scutil>:

$ # Before connecting with the VPN, all I see is my primary Wi-Fi interface.
$ scutil

list State:/Network/Service/[^/]+/IPv4

subKey [0] = State:/Network/Service/1F6ADF95-ABD2-4A7E-9412-4305CEE70C6A/IPv4

show State:/Network/Service/1F6ADF95-ABD2-4A7E-9412-4305CEE70C6A/IPv4

<dictionary> { SubnetMasks : <array> { 0 : 255.255.255.240 } Router : 217.41.101.30 NetworkSignature : IPv4.Router=217.41.101.30;IPv4.RouterHardwareAddress=00:13:49:a6:8a:80 InterfaceName : en1 Addresses : <array> { 0 : 217.41.101.23 } }

^D

$ # Now connect the VPN.
$ # Now I see both Wi-Fi and VPN.

list list State:/Network/Service/[^/]+/IPv4

no keys.

list State:/Network/Service/[^/]+/IPv4

  subKey [0] = State:/Network/Service/1F6ADF95-ABD2-4A7E-9412-4305CEE70C6A/IPv4
  subKey [1] = State:/Network/Service/20CA3728-0201-4F59-9EA1-50B2928B6EA2/IPv4

show State:/Network/Service/20CA3728-0201-4F59-9EA1-50B2928B6EA2/IPv4

<dictionary> {
  Router : 17.151.64.19
  DestAddresses : <array> {
    0 : 17.151.64.19
  }
  ServerAddress : 17.151.63.19
  NetworkSignature : VPN.RemoteAddress=vpn-cup-saci.apple.com
  InterfaceName : ppp0
  Addresses : <array> {
    0 : 17.151.93.11
  }
}

^D

S+E
--
Quinn "The Eskimo!"                    <http://www.apple.com/developer/>
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
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References:  
  >Ip address of VPN (From: "Vasavi Mahadev" <email@hidden>)




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