Thanks Dave, but
"
Use exactly the same test as above:
case STATSVALUE:
if ( strlen(tempPTR->Name) == 0 ) return NULL; <====
long_ret = tempPTR->Value;
return (unsigned char *) &long_ret; "
tempPTR->Name is not a string, it's an integer.
Is it safe to cast it? Or is there another way to do the test? How can
I determine if the pointer is referencing a real value or not?
Dave
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Dave Shield
Sent: Wednesday, January 10, 2007 4:11 AM
To: Wilson, Dave
Cc: net-snmp-users@lists.sourceforge.net
Subject: Re: Dynmically retrieving only objects with real values?
On 09/01/07, Wilson, Dave <[EMAIL PROTECTED]> wrote:
> However, I do not want to
> return entries if they have no value, so in this example, I won't
> return statsname.4, but the walk will go onto the next category. I do
> this by using code like this in the var_CommonStatsTable function:
>
> case STATSNAME:
> strcpy (string, tempPTR->Name);
> *var_len = strlen(string);
> if ( strlen(string) == 0 ) return NULL;
> return (unsigned char *) string;
I would suggest not updating '*var_len' until after you've
checked whether this entry is valid. It probably doesn't
make a difference, but
case STATSNAME:
strcpy (string, tempPTR->Name);
if ( strlen(string) == 0 ) return NULL;
*var_len = strlen(string);
return (unsigned char *) string;
would be slightly safer
> This works fine for strings, but not counters because I sometimes want
> to return objects with values of 0, eg. statsval.1, but I don't want
> to return statsval.4.
>
> How do I do this so that both snmpwalk and a specific snmpget (eg. on
> statsval.3) will work?
Use exactly the same test as above:
case STATSVALUE:
if ( strlen(tempPTR->Name) == 0 ) return NULL; <====
long_ret = tempPTR->Value;
return (unsigned char *) &long_ret;
Dave
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