> interrupt(does linux kernel has any another mechanism? ) after the
> ethernet driver has build the IP datagram.
u mean, after it has stored the ethernet frame into memory.
1. every ethernet driver calls netif_rx().
2. This
i. queues the packet for further processing, __skb_queue_tail(skb).
ii. raises the softirq for further processing,
cpu_raise_softirq(NET_RX_SOFTIRQ)
3. The handler for this softirq is net_rx_action(). This
i. dequeues the skb, __skb_deque()
ii. checks the packet type(0x0800 for IP) specific function and executes
it. For IP this is ip_rcv().
Checkout ip_output.c-->ip_init() function for initialization of the IP
layer.
Vivek.
--
*********************************************************
What is evil to thee does not subsist in the ruling principle of another;
nor yet in any turning and mutation of thy corporeal covering.
Where is it then? or is it really there?...it? what??
- Marcus Aurelius and Vivek in The Meditations and My Interpretations
:-)
*********************************************************
"Vamsi Krishna" <krishna_k@students.iiit.net> wrote in message
Pine.LNX.4.44.0305110113330.14104-100000@students.iiit.net">news:Pine.LNX.4.44.0305110113330.14104-100000@students.iiit.net...
> Hi friends,
> I would be greatful for your help if you could tell me which
> part of the kernel source for ipv4/ethernet implementation has
> the logic for invoking the IP(PF_INET) input function via a Software
> interrupt(does linux kernel has any another mechanism? ) after the
> ethernet driver has build the IP datagram.
>
> Actually I have studied the BSD TCP/IP implementation which uses this kind
> of the software interrupt to trigger the IP processing of the datagram's
> build by underlying protocol.
>
> Does linux kernel implementation have any equivalent to MBUF (BSD) and
> also the Input and Output functions?
>
> Reguards
> Vamsi Krishna.K
>
>
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