[lkml]   [2000]   [Aug]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Any good _online_ kernel BSD sockets reference out there??

On Thu, 31 Aug 2000, Alan Cox wrote:

> > What I still don't understand is how the network layer will pass the
> > request directly to the driver _without_ goind through the INET (IP)
> > layer ... Do you know of any src code that I could use as a reference??
> > Src code that does the "request passing" would be good too ... :)
> AF_PACKET sockets allocate an sk_buff, copy the data into it and call
> dev_queue_xmit() to hand the packet as is to the driver

Ok, so please comment on the description below:

- Userspace:
sd = socket(AF_PACKET, SOCK_RAW, 0); (Is this correct??)
bind(how do I bind this socket to the interface, if I don't have
an address?? Can I just make one up??);
send(sd, data, len);

- Kernel:
"send" makes kernel call dev_queue_xmit(), which will call the
driver's hard_start_xmit function.

- Do I need to bring the interface up with ifconfig before being able to
do this?? My question is because ifconfig doesn't have a "raw mode"
address family ...
- Who opens the interface, if not ifconfig??

Sorry for my dumb questions, and thanks for your help!!


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:38    [W:0.126 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site