Magic IP Address

Magic IP Address

Post by John Kalli » Fri, 16 Nov 2001 19:11:17



I have created an application that requires realtime
communications between the Pocket PC and the ActiveSync
connected desktop PC.  The best mechanism that I have
come up with so far is to open a TCP/IP socket connection
between the two machines and that works well except in
the case where the desktop PC doesn't have a network card
installed and therefore doesn't have an IP address
assigned to it.  Is there a magical IP address that
ActiveSync establishes that I could use in this case.  Or
is there an alternative mechanism for realtime
communications that I could fall back on when I can't use
a TCP/IP socket.  Thanks for your support.
 
 
 

Magic IP Address

Post by Brian Breidenbac » Sat, 17 Nov 2001 08:11:43


Actually there is an IP address that is set by
ActiveSync.  It can be found at
[HKEY_LOCAL_MACHINE\Comm\Tcpip\Hosts\ppp_peer]
and is 192.168.55.100.  ActiveSync also sets the IP
Address of the Pocket PC to 192.168.55.101.

Hope this helps.
Brian Breidenbach

Quote:>-----Original Message-----
>I have created an application that requires realtime
>communications between the Pocket PC and the ActiveSync
>connected desktop PC.  The best mechanism that I have
>come up with so far is to open a TCP/IP socket
connection
>between the two machines and that works well except in
>the case where the desktop PC doesn't have a network
card
>installed and therefore doesn't have an IP address
>assigned to it.  Is there a magical IP address that
>ActiveSync establishes that I could use in this case.  
Or
>is there an alternative mechanism for realtime
>communications that I could fall back on when I can't
use
>a TCP/IP socket.  Thanks for your support.
>.


 
 
 

1. TCP/IP using serial cradle (how to get an IP address on ipaq)

Hi all,I am about to develop an application for my ipaq which uses winsock,
but that aside...

I installed vxIPConfig and I get the following information:

IP address: 192.168.55.101
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.55.100

ipaq is connected to PC via usb in cradle

I want to ping my pc from ipaq, and ipaq from pc

problem now:
my pc is connected to the internet and i have this information:

Windows 2000 IP Configuration

Ethernet adapter Local Area Connection 2:

        Connection-specific DNS Suffix  . : les.edm.luc.ac.be
        IP Address. . . . . . . . . . . . : 172.16.0.29
        Subnet Mask . . . . . . . . . . . : 255.255.0.0
        Default Gateway . . . . . . . . . : 172.16.254.254

now I know ping 192.168.55.101 is not going to work because I have another
network

but how DO I get it working?

If on my PC i manually change IP parameters:
Windows 2000 IP Configuration

Ethernet adapter Local Area Connection 2:

        Connection-specific DNS Suffix  . :
        IP Address. . . . . . . . . . . . : 192.168.55.102
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.55.100

It DOES NOT work either

same problem for the other way around... (ping PC from ipaq)

I read all kinds of messages telling you how to change your registry and
installing a proxy to be able to surf the internet and read newsgroups on
your ipaq,
but I can surf the internet without doing that

So my question comes down to this: "how can I change things so that I can
access the campus network, on which my desktop PC is also (it makes use of
dhcp) and so that I can start writing an application which uses winsock"

tnx a lot
Steven Palmaers

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