On Sat, Jun 16, 2018 at 11:17:01PM +0530, V.Ravikumar wrote: > Understood Rami Rosen. Thank you. > > Regards > Ravi > > On Sat, Jun 16, 2018 at 11:10 PM, Rami Rosen <roszenrami@xxxxxxxxx> wrote: > > > Hi Ravi, > > The path that a packet goes through, from being received by the > > network driver and up to kernel Layer 3 (IPV4/IPV6) and from > > there to kernel Layer 4 (UDP/TCP/SCTP/other sockets) and from there to > > userspace sockets is quite complex. The logic is heavy, on that path > > there are lookups in routing tables, netfilter hooks, sanity checks, > > interaction with other subsystems, and more. > > > > In order to try to simplify things, and not go into deep technical > > details, we can say that generally the 5 tuple of the packet (SRC > > address, DST address, SRC port, DST port and protocol) is what > > determines to which socket it will go. > > > > Regards, > > Rami Rosen > > http://ramirose.wixsite.com/ramirosen > > > > > > > > > > On 16 June 2018 at 20:16, V.Ravikumar <ravikumar.vallabhu@xxxxxxxxx> > > wrote: > > > Hi All, > > > > > > I wanted to know how a packet received will be handovered to a correct > > user > > > process. > > > Basically I want to understand what are the various header parameters in > > > packet which will help to find the open socket descriptor of respective > > > user process. I'm not able to find the exact answers in the web. Or you could read Rami's book, you will learn a whole bunch :) Tobin _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
