[Eldred]

There are probably packets, because I can see them if I run the sample of packetsniffer… Maybe an initialization problem or something ?

[Eldred]

Thanks for the link. I managed to compile my own program on another system, using the C interface. I can display the adapter list ; but I can’t ReadPacket(..) : it returns false.

I don’t know what I am missing :

TCP_AdapterList AdList;
INTERMEDIATE_BUFFER PacketBuffer;
ETH_REQUEST ReadRequest;
ADAPTER_MODE Mode;

ZeroMemory ( &ReadRequest, sizeof(ETH_REQUEST) );

ZeroMemory ( &PacketBuffer, sizeof(INTERMEDIATE_BUFFER) );
ReadRequest.hAdapterHandle = (HANDLE)AdList.m_nAdapterHandle[IFACE];

ReadRequest.EthPacket.Buffer = &PacketBuffer;

Mode.dwFlags = MSTCP_FLAG_SENT_LISTEN|MSTCP_FLAG_RECV_LISTEN;

Mode.hAdapterHandle = (HANDLE)AdList.m_nAdapterHandle[IFACE];

SetAdapterMode(hDrv,&Mode);

int count = 0;
while(ReadPacket(hDrv,&ReadRequest) && count<10)
{
cout<< PacketBuffer.m_Length< count++;
}

Is there a problem of initialization, or someting like that ? This code looks like the one from the sample, but… it can’t read anything although the sample can.

[Eldred]

Probably. How can I check this ?

[Eldred]

It still doesn’t work… I’m just trying to build this simple program that should display “0” :

#include
#include
#include “Common.h”
#include “ndisapi.h”
#include

int main()
{
printf(“%sn”,GetDriverVersion(NULL));
return 0;
}

with g++ -o test main.cc -lndisapi

I tried to link with the provided library, then mine ; and I still have a :

D:DOCUME~1EldredLOCALS~1Temp/ccE1baaa.o(.text+0x2a):main.cc: undefined reference to `GetDriverVersion@4′

I don’t understand…

[Eldred]

OK I get it, thank you.

And I’m sorry, I edited my last post because I hadn’t see you had answered.

[Eldred]

About the 3g modem I can’t test it now but I remember I established the connection before to test and it didn’t appear in the list… It’s a particular modem that works in VPN mode only, does that change a thing ?

About the build, I tried to build the library with my own compiler :

g++ -c *.cpp
ar -rc ndisapi.a *.o
ar s ndisapi.a
ren ndisapi.a ndisapi.lib

Got the following errors when trying to build my program using this library :

g++ -o ip_forward *.o -lndisapi
main.o(.text+0x9c):main.cc: undefined reference to `_imp___ZN8CNdisApiC1EPKc’
D:/Utilitaires/Programmation/MinGW/bin/../lib/gcc-lib/mingw32/3.3.1/../../..ndi
sapi.lib(ndisapi.o.b)(.text+0x3c):ndisapi.cpp: undefined reference to `_imp___ZT
V8CNdisApi’
D:/Utilitaires/Programmation/MinGW/bin/../lib/gcc-lib/mingw32/3.3.1/../../..ndi
sapi.lib(ndisapi.o.b)(.text+0x1e8):ndisapi.cpp: undefined reference to `_imp___Z
TV8CNdisApi’
D:/Utilitaires/Programmation/MinGW/bin/../lib/gcc-lib/mingw32/3.3.1/../../..ndi
sapi.lib(ndisapi.o.b)(.text+0x391):ndisapi.cpp: undefined reference to `_imp___Z
TV8CNdisApi’
D:/Utilitaires/Programmation/MinGW/bin/../lib/gcc-lib/mingw32/3.3.1/../../..ndi
sapi.lib(ndisapi.o.b)(.text+0x3f3):ndisapi.cpp: undefined reference to `_imp___Z
TV8CNdisApi’
D:/Utilitaires/Programmation/MinGW/bin/../lib/gcc-lib/mingw32/3.3.1/../../..ndi
sapi.lib(ndisapi.o.b)(.text+0x455):ndisapi.cpp: undefined reference to `_imp___Z
TV8CNdisApi’

If I copy the dll file already build into the lib folder, it gives me :

main.o(.text+0x26):main.cc: undefined reference to `GetDriverVersion@4′
main.o(.text+0x9c):main.cc: undefined reference to `_imp___ZN8CNdisApiC1EPKc’
main.o(.text+0xb9):main.cc: undefined reference to `CNdisApi::~CNdisApi()’

Now I try to build the dll on my own, but same errors again :

g++ -shared ndisapi.o -o ndisapi.dll
ndisapi.o(.text+0x3c):ndisapi.cpp: undefined reference to `_imp___ZTV8CNdisApi’
ndisapi.o(.text+0x1e8):ndisapi.cpp: undefined reference to `_imp___ZTV8CNdisApi’

ndisapi.o(.text+0x391):ndisapi.cpp: undefined reference to `_imp___ZTV8CNdisApi’

ndisapi.o(.text+0x3f3):ndisapi.cpp: undefined reference to `_imp___ZTV8CNdisApi’

ndisapi.o(.text+0x455):ndisapi.cpp: undefined reference to `_imp___ZTV8CNdisApi’

What am I missing ?

[Eldred]

I installed the VirtNet interface and it should be easier to do the forwarding : if I’m able to check the packets’ source and destination, I’ll “just” have to call SendPacketsToAdapter() where ETH_M_REQUEST.hAdapterHandle is set to the handle of the virtnet interface.

I’m trying to build an example in order to learn how to use the API. I want to use the C++ class to integrate it into an existing program. But I use MinGW and the build fails :

C:UsersEldredDocumentssrc_testip_forward>g++ -o ip_forward main.cc -lndisapi
C:UsersEldredAppDataLocalTemp/ccO5lqAd.o:main.cc:(.text+0x19e): undefined r
eference to `_imp___ZN8CNdisApiC1EPKc’
C:UsersEldredAppDataLocalTemp/ccO5lqAd.o:main.cc:(.text+0x1bb): undefined r
eference to `CNdisApi::~CNdisApi()’

The link seems to be correct however, because if I don’t do this I have one more error. Any idea to fix this error ?

I also have another question : I ran listadapters.exe and it shew me a list of interfaces. Then, I plugged a 3G key and ran again the program : it shew me the same list as before. Is this normal ?

[Eldred]

Thank you very much for your answer.
@SerpentFly wrote:

Yes, this is possible. However you have to write the forwarding code by yourself.

Is there a documentation more detailed than the one provided with the samples ? I don’t know how to start…

[Author]

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