RE: NetSNMP 5.0.3.1 Questions

#1 (**permalink**) 06-15-2006

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Hi Robert,

=20

That is the answer I was looking for, and thank you for sharing the info
with me. I'll modify this function in myMacTable_interface.c

=20

=20

int

myMacTable_index_from_oid(netsnmp_index * oid_idx,

myMacTable_mib_index * mib_idx)

{

int err =3D SNMP_ERR_NOERROR;

=20

/*

* temp storage for parsing indexes

*/

/*

* myMacAddr(1)/MacAddress/ASN_OCTET_STR/char(char)//L/a/w/e/R/d/H

*/

netsnmp_variable_list var_myMacAddr;

=20

/*

* set up varbinds

*/

memset(&var_myMacAddr, 0x00, sizeof(var_myMacAddr));

var_myMacAddr.type =3D ASN_PRIV_IMPLIED_OCTET_STR;

=20

/*

* chain temp index varbinds together

*/

var_myMacAddr.next_variable =3D NULL;

=20

=20

DEBUGMSGTL(("verbose:myMacTable:myMacTable_index_f rom_oid",

"called\n"));

=20

/*

* parse the oid into the individual index components

*/

err =3D parse_oid_indexes(oid_idx->oids, oid_idx->len,

&var_myMacAddr);

if (err =3D=3D SNMP_ERR_NOERROR) {

/*

* copy out values

*/

/*

* NOTE: val_len is in bytes, myMacAddr_len might not be

*/

if (var_myMacAddr.val_len > sizeof(mib_idx->myMacAddr))

err =3D SNMP_ERR_GENERR;

else {

memcpy(mib_idx->myMacAddr, var_myMacAddr.val.string,

var_myMacAddr.val_len);

mib_idx->myMacAddr_len =3D

var_myMacAddr.val_len /

sizeof(mib_idx->myMacAddr[0]);

}

=20

=20

}

=20

=20

Hao Phan

Network Administration System

Wireless Systems Business Unit

M/A-COM Lowell, MA

www.macom.com

=20

P: 978-442-4049

F: 978-442-5353

=20

=20

-----Original Message-----
From: Robert Story [mailto:rstory@freesnmp.com]=20
Sent: Wednesday, June 14, 2006 3:32 PM
To: Wes Hardaker
Cc: net-snmp-coders@lists.sourceforge.net; Phan, Hao T
Subject: Re: NetSNMP 5.0.3.1 Questions

=20

On Mon, 12 Jun 2006 09:36:58 -0700 Wes wrote:

WH> Hao> My question is how can I get rid of the 6 (mac address len) so
my

WH> Hao> index is simply the mac address itself?

WH>=20

WH> If the MIB definition for that object is *exactly* 6 octets in
length,

WH> then it's ok to get rid of it. However, if it's a variable length
at

WH> all you need to keep it there.

=20

To answer the technical side, if it is defined as a fixed length string,
then

you need to change the type in the index registration (for MFD code, in

*_interface.c). Change the type to ASN_PRIV_IMPLIED_OCTET_STR.

=20

--=20

NOTE: messages sent directly to me, instead of the lists, will be
deleted

unless they are requests for paid consulting services.

=20

Robert Story; NET-SNMP Junkie

Support: <http://www.net-snmp.org/> <irc://irc.freenode.net/#net-snmp>

Archive:
<http://sourceforge.net/mailarchive/forum.php?forum=3Dnet-snmp-coders>

=20

You are lost in a twisty maze of little standards, all different.=20

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<meta name=3DGenerator content=3D"Microsoft Word 10 (filtered)">

<style>

</style>

</head>

<body lang=3DEN-US link=3Dblue vlink=3D"#606420">

<div class=3DSection1>

Hi Robert,

 

That is the answer I was looking for, and thank you for sharing =
the
info with me.  I'll modify this function in =
myMacTable_interface.c

 

 

int

myMacTable_index_from_oid(netsnmp_index * =
oid_idx,

       & nbsp;   =
        &n bsp;   &=
nbsp;     
myMacTable_mib_index * mib_idx)

{

    =
int       &nbsp ;   &nbs=
p;
err =3D SNMP_ERR_NOERROR;

 

    /*

     * temp storage for parsing =
indexes

     */

    /*

     * =
myMacAddr(1)/MacAddress/ASN_OCTET_STR/char(char)//L/a/w/e/R/d/H</f=
ont>

     */

    netsnmp_variable_list =
var_myMacAddr;

 

    /*

     * set up varbinds

     */

    memset(&var_myMacAddr, 0x00, =
sizeof(var_myMacAddr));

    var_myMacAddr.type =3D ASN_PRIV_IMPLIED_OCTET_STR</f=
ont>;

 

    /*

     * chain temp index varbinds =
together

     */

    var_myMacAddr.next_variable =3D =
NULL;

 

 

    =
DEBUGMSGTL(("verbose:myMacTable:myMacTable_in dex_from_oid",</sp=
an>

       & nbsp;   =
    
"called\n"));

 

    /*

     * parse the oid into the individual =
index
components

     */

    err =3D parse_oid_indexes(oid_idx->oids, =
oid_idx->len,

       & nbsp;   =
        &n bsp;   &=
nbsp;   
&var_myMacAddr);

    if (err =3D=3D SNMP_ERR_NOERROR) =
{

        /*

       & nbsp; * copy out =
values

       & nbsp; =
*/

        /*

       & nbsp; * NOTE: val_len =
is in
bytes, myMacAddr_len might not be

       & nbsp; =
*/

        if =
(var_myMacAddr.val_len
> sizeof(mib_idx->myMacAddr))

       & nbsp;   =
err =3D
SNMP_ERR_GENERR;

        else =
{

       & nbsp;   =
memcpy(mib_idx->myMacAddr,
var_myMacAddr.val.string,

       & nbsp;   =
       
var_myMacAddr.val_len);

       & nbsp;   =
mib_idx->myMacAddr_len
=3D

       & nbsp;   =
    
var_myMacAddr.val_len /

       & nbsp;   =
    
sizeof(mib_idx->myMacAddr[0]);

        }

 

 

    }

 

 

Hao Phan

Network Administration System

Wireless Systems Business Unit

M/A-COM Lowell, MA

www.macom.com

 

P: 978-442-4049

F: 978-442-5353

 

 

-----Original Message----- 
From: Robert Story [mailto:rstory@freesnmp.com] 
Sent: Wednesday, June 14, 2006 3:32 PM 
To: Wes Hardaker 
Cc: net-snmp-coders@lists.sourceforge.net; Phan, Hao T 
Subject: Re: NetSNMP 5.0.3.1 Questions

 

On Mon, 12 Jun 2006 09:36:58 -0700 Wes wrote:

WH> Hao> My question is how can I get rid of the 6 (mac =
address
len) so my

WH> Hao> index is simply the mac address =
itself?

WH> 

WH> If the MIB definition for that object is *exactly* 6 =
octets in
length,

WH> then it's ok to get rid of it.  However, if it's a =
variable
length at

WH> all you need to keep it there.

 

To answer the technical side, if it is defined as a fixed length
string, then

you need to change the type in the index registration (for MFD =
code, in

*_interface.c). Change the type to =
ASN_PRIV_IMPLIED_OCTET_STR.

 

-- 

NOTE: messages sent directly to me, instead of the lists, will =
be
deleted

      unless they are requests for paid
consulting services.

 

Robert Story; NET-SNMP Junkie

Support: <http://www.net-snmp.org/>
<irc://irc.freenode.net/#net-snmp>

Archive:
<http://sourceforge.net/mailarchive/f...-snmp-coders&=
gt;

 

You are lost in a twisty maze of little standards, all =
different. 

</div>

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