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Mamatha | 26 Jun 2012 06:49

Inject payload with crypto algorithms

Hi,

       I am implementing one application using libpcap but I am unble to
use pcap_inject is failing it showing undefined reference to this
function...I searched header file also The function is not avalible..

   My requirement:
                        case1:
                               I have to recevie the packets from 3000 port
of one internal device (interface).I have to apply encryption
                               and send back (inject payload)to same port
again of interface
                         case 2:I have to get the 3001 port for decryption
again I want send back to same using libcap functions
 doubt: If receive the packet payload its in (decrypted format)in original
data but I want to apply double encryption for packets encrypted data..how
should I get the encrypted data..

         I would like ask you send any sample code using any crypto
algorithms and libcap.
 It might be help ful for my application..

Thanks &regards
Mamatha
mamathaece <at> gmail.com

headers

Guy Harris | 26 Jun 2012 20:45

Re: Inject payload with crypto algorithms

On Jun 25, 2012, at 9:49 PM, Mamatha wrote:

>       I am implementing one application using libpcap but I am unble to
> use pcap_inject is failing it showing undefined reference to this
> function...I searched header file also The function is not avalible..

It *isn't* available in libpcap prior to 0.9.0; what version of libpcap do you have on your machine?  If it's
not 0.9.x or 1.x, you don't have pcap_inject().-
This is the tcpdump-workers list.
Visit https://cod.sandelman.ca/ to unsubscribe.

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Esteban Pellegrino | 26 Jun 2012 20:30

Re: Inject payload with crypto algorithms

You should specify what version of libpcap you are using and the OS. On
last ubuntu with libpcap 1.1.1 pcpa_inject is defined on pcap/pcap.h and I
can successfully link that function with my code.

Best,

Esteban

On Tue, Jun 26, 2012 at 1:49 AM, Mamatha <mamathaece <at> gmail.com> wrote:

> Hi,
>
>       I am implementing one application using libpcap but I am unble to
> use pcap_inject is failing it showing undefined reference to this
> function...I searched header file also The function is not avalible..
>
>   My requirement:
>                        case1:
>                               I have to recevie the packets from 3000 port
> of one internal device (interface).I have to apply encryption
>                               and send back (inject payload)to same port
> again of interface
>                         case 2:I have to get the 3001 port for decryption
> again I want send back to same using libcap functions
>  doubt: If receive the packet payload its in (decrypted format)in original
> data but I want to apply double encryption for packets encrypted data..how
> should I get the encrypted data..
>
>         I would like ask you send any sample code using any crypto
> algorithms and libcap.

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