[Click] Re: Two questions: p->kill(), and ping reply

[Andrushka]

Hello!
I got ping answer from click with next configuration:

in :: PollNic(0); 
out :: ToNic(0);
c :: Classifier(12/0806 20/0001, // ARP request
               12/0806 20/0002,  // ARP reply
               12/0800,          // IP packet
               -);               // All other
arpq :: ARPQuerier(192.168.0.1, 52:54:00:12:34:56);


in -> c;
arpq[0] -> out;

c[2]
        -> Strip(14)
        -> CheckIPHeader
        -> CheckICMPHeader
        -> IPPrint(ICMP)
        -> ICMPPingResponder
        -> [0]arpq;

c[0]
        -> Print(ARP_request)
        -> ARPResponder(192.168.0.1 52:54:00:12:34:56, 10.0.0.1
52:54:00:12:34:57)
        -> out;

c[1]
        -> [1]arpq;

c[3]
        -> Discard;

But  click prints next:
 ARP:   60 | 52540012 345600ff c7d77bbf 08060001 08000604 000100ff
 ICMP: 0.000000: 192.168.0.5 > 192.168.0.1: icmp: echo request (6108, 1280)
 ICMP: 88.402516: 192.168.0.1 > 192.168.0.5: icmp: echo reply (6108, 1280)
 ICMP: 0.000000: 192.168.0.5 > 192.168.0.1: icmp: echo request (6108, 1536)
 ICMP: 91.484948: 192.168.0.1 > 192.168.0.5: icmp: echo reply (6108, 1536)
 ICMP: 0.000000: 192.168.0.5 > 192.168.0.1: icmp: echo request (6108, 1792)
 ICMP: 94.496430: 192.168.0.1 > 192.168.0.5: icmp: echo reply (6108, 1792)

I can't understand why there strings with "echo reply"????
There are must be only "echo request".

And the question 1 is still actual.

On 8/25/05, Andrushka <andrusha at gmail.com> wrote:
> Hello!
> Now i'm using next config:
> =========================================
> in :: PollNic(0);
> out :: ToNic(0);
> ip :: CheckIPHeader(14);
> 
> in -> ip;
> ip[0]
>         -> CheckICMPHeader
>         -> IPPrint(ICMP)
>         -> ICMPPingResponder
>         -> out;
> 
> ip[1]
>         -> Print(ARP)
>         -> ARPResponder(192.168.0.1 52:54:00:12:34:56)
>         -> out;
> ==========================================
> 
> Question 1:
> 
> My ToNic is PUSH processing:
> 
> void ToNic::push(int, Packet *p)
> {
>   n_write(_nic, p->data(), p->length());
>   //p->kill();
> }
> 
> But when i uncomment p->kill() Click is seg_fault. Why ?
> 
> Question 2:
> When i ping 192.168.0.1 my ping program got ARP answer.
> Click prints next:
> ARP:   60 | 52540012 345600ff c7d77bbf 08060001 08000604 000100ff
> ICMP: 0.000000: 192.168.0.5 > 192.168.0.1: icmp: echo request (6108, 1280)
> ICMP: 88.402516: 192.168.0.1 > 192.168.0.5: icmp: echo reply (6108, 1280)
> ICMP: 0.000000: 192.168.0.5 > 192.168.0.1: icmp: echo request (6108, 1536)
> ICMP: 91.484948: 192.168.0.1 > 192.168.0.5: icmp: echo reply (6108, 1536)
> ICMP: 0.000000: 192.168.0.5 > 192.168.0.1: icmp: echo request (6108, 1792)
> ICMP: 94.496430: 192.168.0.1 > 192.168.0.5: icmp: echo reply (6108, 1792)
> 
> I can't understand why there strings with "echo reply"????
> There are must be only "echo request".
> 
> And my ping doesn't recive any echo answer:
> bash-2.05b$ ping 192.168.0.1
> PING 192.168.0.1 (192.168.0.1) 1450(1478) bytes of data.
> 
> --- 192.168.0.1 ping statistics ---
> 3 packets transmitted, 0 received, 100% packet loss, time 1801ms
> 
> And when i do tcpdump:
> 09:43:56.887896 arp who-has 192.168.0.1 tell 192.168.0.5
> 09:43:56.922986 arp reply 192.168.0.1 is-at 52:54:00:12:34:56
> 09:43:57.628382 IP 192.168.0.5 > 192.168.0.1: icmp 1458: echo request seq 1
> 09:43:57.671099 IP 192.168.0.1 > 192.168.0.5: icmp 1458: echo reply seq 1
> 09:43:58.627928 IP 192.168.0.5 > 192.168.0.1: icmp 1458: echo request seq 2
> 09:43:58.655502 IP 192.168.0.1 > 192.168.0.5: icmp 1458: echo reply seq 2
> 09:43:59.627930 IP 192.168.0.5 > 192.168.0.1: icmp 1458: echo request seq 3
> 09:43:59.675073 IP 192.168.0.1 > 192.168.0.5: icmp 1458: echo reply seq 3
> 
> Why ping doesn't recive answer?
> 
> Thanks!
>