Re: weird ip sequence number

[Xinwen - Fu]

Richard,
	
> 
> The sequence numbers for 'ping' come from ping. They are not generated
> by the kernel.
> 
> `strace` [snipped]
> sendto(3, "\10\0\335\360\360T\0\0@^q<\202\34\v\0\10\t\n\v\f\r\16\17"...,
>                               |________ sequence NR
> 
> sendto(3, "\10\0\237\v\360T\1\0A^q<\277\1\v\0\10\t\n\v\f\r\16\17\20"...,
>                             |___________ sequence NR

I want a true ip_id from the kernel and this id will not be used by
any other packet.

Although there are few chances that our randomly chosen ip_id collides
with the other packet's ip_id generated by kernel, I don't want this
possibility to happen.

So is there any method to get a true ip_id from the kernel? 

I want this ip_id to do my own fragmentation on a packet.

Thanks!

Xinwen