Re: libnet_write

Hi Mustafa,

   Yes I saw that libnet_write_raw_ipv4 is used in your function, but as
you said it is not part of 1.1.2.1, then how did it work ? thats confusing
?? So if this worked, then we can use libnet_write_raw_ipv4 directly also,
right ?

thanks
Amit




"Mustafa Abu Sedera" <[email protected]> on 06/08/2004 09:54:35 PM

To:    Amit Kumar Singh/HSS@HSS
cc:    [email protected], [email protected], [email protected]

Subject:    Re: libnet_write



Hi,
libnet_write_raw_ipv4 is an official function in the old libnet API 0.x.x.x
not in 1.x.x.x. But if you look carefully in the code you can see that it
is
used. I used this libnet_adv_write_raw with libnet 1.1.2 and it worked
without problems.

Regards,
Mustaffa Abu Sedira

>From: [email protected]
>To: "Mustafa Abu Sedera" <[email protected]>
>CC: [email protected], [email protected], [email protected]
>Subject: Re: libnet_write
>Date: Tue, 8 Jun 2004 20:45:45 +0530
>
>
>
>
>
>thanks mustafa,
>
>   I havent been able to try it out because of time. Just one question,
>agreed libnet_adv_write_raw is not an official function, but
>libnet_write_raw_ipv4 is an official libnet function, right ? and which
>libnet version are we talking of ?, is libnet_write_ipv4 available in
>libnet 1.1.2.1, because I use thie version , and I believe this is the
>latest.
>
>regards,
>Amit
>
>
>
>
>"Mustafa Abu Sedera" <[email protected]> on 06/08/2004 08:40:40 PM
>
>To:    Amit Kumar Singh/HSS@HSS, [email protected]
>cc:    [email protected], [email protected]
>
>Subject:    Re: libnet_write
>
>
>
>Hi,
>like I wrote before.....if you don't want do build the eth hdr you can use
>libnet_adv_write_raw().
>This is nto an "official" function in libnet. I modified the
>libnet_adv_write_link() so that it injects the packet to the kernel which
>takes care of the eth hdr because i needed it in a program.
>You just copy and paste the code at the beginning of your program or in a
>header file then use it like an ordinary libnet function.
>I suggested before to add it to the libnet API but didn't get any
feedback.
>Please try it out as it made my job much easier.
>here it is again if you have deleted the previous email:
>
>int
>libnet_adv_write_raw(libnet_t *l, u_int8_t *packet, u_int32_t len)
>{
>     u_int c;
>
>     if (l == NULL)
>     {
>         return (-1);
>     }
>
>     /* assume error */
>     c = -1;
>
>     switch (l->injection_type)
>     {
>         case LIBNET_RAW4_ADV:
>             if (len > LIBNET_MAX_PACKET)
>             {
>                 snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
>                         "%s(): packet is too large %d\n", __func__, len);
>                 return (c);
>             }
>             c = libnet_write_raw_ipv4(l, packet, len);
>             break;
>
>         case LIBNET_RAW6_ADV:
>             c = libnet_write_raw_ipv6(l, packet, len);
>             break;
>
>         default:
>             snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
>                 "%s(): advanced raw mode not enabled\n", __func__);
>             return (-1);
>     }
>
>     /* do statistics */
>     if (c == len)
>     {
>         l->stats.packets_sent++;
>         l->stats.bytes_written += c;
>     }
>     else
>     {
>         l->stats.packet_errors++;
>         /*
>          *  XXX - we probably should have a way to retrieve the number of
>          *  bytes actually written (since we might have written
>something).
>          */
>         if (c > 0)
>         {
>             l->stats.bytes_written += c;
>         }
>     }
>
>     return (c);
>}
>To describe the function again....
>You pass a pointer "packet" which would point to the ip header of a packet
>with length "len" (total IP packet length without the eth hdr) and it
>writes
>the packet to libnet handle "l".
>
>Regards,
>Mustaffa Abu Sedira
>
>
> >From: [email protected]
> >To: Aaron Turner <[email protected]>
> >CC: "Jee J.Z." <[email protected]>, [email protected]
> >Subject: Re: libnet_write
> >Date: Mon, 7 Jun 2004 10:01:44 +0530
> >
> >
> >
> >
> >
> >Hi,
> >
> >   What if I do not want to build the ethernet header. I want the packet
>to
> >be a raw packet that is handed to ip after the write call. What about
> >libnet_write_raw_ipv4, i tihink that is no longer supported, i use
libnet
> >1.1.2.1.
> >  Mustafa talked about libnet_write_raw_ipv4, but I can't finds that in
>my
> >help either, such a function exists ?
> >
> >thanks
> >Amit
> >
>
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