[ECOS] Re: SNMP lockup

Grant Edwards grante@visi.com
Fri May 8 21:29:00 GMT 2009


On 2009-05-08, Grant Edwards <grante@visi.com> wrote:

> It appears that in mibgroup/mibII/interfaces.c, the call to 
>
>   cyg_snmp_get_if(if_num)
>
> with if_num==0 never returns.

    struct ifnet *cyg_snmp_get_if(int if_num) {
      int index = 0;
      struct ifnet *ifp;
      
      do {
        while(0 == ifnet_addrs[index])
          index++;
    
        ifp = ifnet_addrs[index]->ifa_ifp;
        
        if_num--;       
        index++;
      } while (if_num);
    
      return ifp;
    }

If the above code is called with if_num==0, won't it decrement
it to -1, and then loop 2^32 times before giving up?

-- 
Grant Edwards                   grante             Yow! What I want to find
                                  at               out is -- do parrots know
                               visi.com            much about Astro-Turf?


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