Re: A question bout API description.

On 23/07/07, 高翔 <[email protected]> wrote:
>
>  1.About snmp_sess_init(), "May perform one time minimal library
> initialization.", what is it mean?

If you look at the file snmplib/snmp_api.c, the comment immedately
before the routine '_init_snmp' says:


 * Primordial SNMP library initialization.
 * Initializes mutex locks.
 * Invokes minimum required initialization for displaying MIB objects.
 * Gets initial request ID for all transactions,
 * and finds which port SNMP over UDP uses.


That's what is covered by this "minimal library initialization".



> 2.About snmp_read(), "Each socket with it's fd set has a packet read from it
> and snmp_parse is called on the packet received." , what is it mean ?

The 'snmp_read()' routine is passed a set of file descriptors.
It may be a single file descriptor - it may be several.

For each of these file descriptors, if there is an SNMP packet waiting
to be processed, then 'snmp_read' will read this in, and call 'snmp_parse'
to convert it into an 'snmp_pdu' structure, ready for the rest of the
application to work with.
   This will be done for each of the file descriptors in turn.

Dave

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