US Robotics USR2410 Uživatelský manuál stáhnout pdf (Strana 63)

// handles IP packets with Grid data encapsulation

grid_data_demux :: IPClassifier(dst host me, // ip for us

dst net me/24, // ip for Grid network

- ); //other packets

// dev0

dev0 :: ToGridDev(ath0);

from_dev0 :: FromGridDev(ath0, me:eth)

from_dev0 [0] -> Paint(0) -> grid_demux

from_dev0 [1] -> Paint(0) -> probe_cl :: Classifier(12/7ffe, 12/7ffd);

probe_cl [0] -> ls -> probe_switch :: Switch(-1) -> dev0;

probe_cl [1] -> ls2 -> probe_switch;

// support for traceroute

dec_ip_ttl :: TTLChecker -> dev0;

dec_ip_ttl [1] -> ip_demux;

//tee the data, strip the grid header, print the packet

//if no print is required, use this line:

//grid_demux [0] -> CheckIPHeader( , 82)-> grid_data_demux;

grid_demux [0] -> CheckIPHeader( , 82)->print_tee :: Tee;

print_tee[0] -> grid_data_demux;

print_tee[1] -> Strip(82) -> IPPrint(grid_demux[0]->) -> Discard;

grid_demux [1] -> nb -> dev0;

ip_input :: CheckIPHeader -> GetIPAddress(16) -> ip_demux;

to_host :: ToHost(grid0);

to_host_encap :: EtherEncap(0x0800, 1:1:1:1:1:1, 2:2:2:2:2:2) -> to_host;

from_host :: FromHost(grid0, me/24) -> arp_demux -> ARPResponder(0.0.0.0/0 1:1:1:1:1:1) -

> to_host;

arp_demux [1] -> Strip(14) -> ip_input;

from_dev0 [2] -> ToHost(me);

ip_demux [0] -> to_host_encap; // loopback packet sent by us, required on BSD userlevel

ip_demux [1] -> GridEncap(me:eth, me:ip) -> dec_ip_ttl; // forward packet sent by us

grid_data_demux [0] -> Strip(82) -> to_host_encap; // receive packet from net for us

grid_data_demux [1] -> dec_ip_ttl; // forward packet from

net for someone else

grid_data_demux [2] -> to_gateway -> dec_ip_ttl; //forward packets destined for the

outside world to the gateway

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US Robotics USR2410 Uživatelský manuál Strana 63