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Environment: Windows CE 2.11+, Windows 2000, Windows NT, Visual C++ 6
Unfortunately, the HPC/PPC devices (running Windows CE) lack a ping utility. Therefore, because
the HPC PRO SDK (version 2.11+) does have a subset of the ICMP functions, I was
able to write my CEPing utility which can be helpful for checking the
connection of CE devices to other friends ( CE devices or bigger machines )
on a TCP/IP network. In the case of lack of such utility it is possible to
check if CE device is in the net by standard ping utility from some
'big'( PC ) computer. I didn't produce ceping for emulation mode because
of the absence of ICMP functions for emulation mode.
In CEPing, I defined only a subset of the standard ping.exe parameters
for simplicity. However, it would trivial to add any omitted functionality
as I'e included the complete source code here. By default, CEPing functions
like the standard ping utility with -a switch specified (it tries to
resolve addresses to peer computers). But, obviously, that's not always
possible. Therefore, there are time when you can't see the names of
peer computers on the line under IP/Name editbox. Basically, it all depends
on how you have WINS defined in the network properties Control Panel applet.
The problem is that without a WINS server definition, the gethostbyname() and
gethostbyaddress() functions will return NULL.
Therefore, in this case, it is only possible to check the IP address of
peers and not resolve the name. The result of typing correct peer
name in this case is "Wrong Name" answer on ping operation.
I checked the HPC (Jornada 680) with my PC with LP-E ethernet card
and Xircom card. By default, Xircom installed my PC IP as a WINS
server. Here is a table which describes the behavour of the
gethostbyname() and gethostbyaddress() functions in different environment
(based on the definition of the WINS settings).
V = resolution exist
X = no resolution
No WINS server | WINS defined | Wins defined as host PC
defined | host PC | others PC | host PC | others PC
gethostbyname() X | V V | V X
gethostbyaddress() X | V X | V X
As you can see from the figure above, the results of the ping are
displayed in combo box and each string contains the number
of connection attempts as well as the RTT (Round Trip Timetime)
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