For all ZRP packets, it decrements the ttl value at the recv function.
he(coder) asserts the [hdrip->ttl() -= 1;] statement with another variable
'jem'. That's it!!!
Now if ttl value is less than 0, then it simply drops the packet. [which
cannot happen]
Batbold Toiruul-2 wrote:
>
>
> Dear ns users,
> from zrp.cc code, Could anyone explain below piece of code to me, please?
>
> if (hdrc->ptype() == PT_ZRP) {
> jem = hdrip->ttl();
> hdrip->ttl() -= 1;
> assert(jem == (hdrip->ttl() + 1) );
> if (hdrip->ttl() < 0) {
> zdrop(p, DROP_RTR_TTL);
> return;
> }
>
>
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