Kernel Packet Processing

[prashuk jain]

How the packets are processed in beaglebone 3.8 kernel from MAC layer to Application layer. ??

If I want to count the number of packets count at MAC layer....What all Kernel files are required.??

Thanks in advance  :))

[Przemek Klosowski]

ip -s link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    RX: bytes  packets  errors  dropped overrun mcast  
    610918     6403     0       0       0       0     
    TX: bytes  packets  errors  dropped carrier collsns
    610918     6403     0       0       0       0     
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether 12:34:56:78:90:12 brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast  
    1313119911 1246744  0       0       0       0     
    TX: bytes  packets  errors  dropped carrier collsns
    95697537   731304   0       0       0       0     

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[prashuk jain]

Thanks Sir, this is using qdisc utility to count the number of packets.

I want to run a counter at MAC layer only, for which I have to write a Kernel Module.

I watched eth.c file in linux 3.14 kernel, but got confused.

Any documentation or help would be appreciable ??

Thanks :)