Thank you very much for the help.
My main issue is not to send the data to the GUI, the problem is to get it out of the net-snmp library. The "find your data" part in your suggestion. How do I read snmpInPkts, snmpOutPkts etc out of the library from C function calls?
/Gustav
On Thu, 2 May 2013 23:44:26 +0200
Tim Cox <timmiles...@gmx.ch> wrote:
>
>
>
> It really depends on being able to see your agent's data from a
> program which is not itself SNMP and using sockets which are not
> SNMP's sockets
>
> I'm assuming you are talking about two different machines, one
> containing an agent and the other a manager
>
> You want to interrogate data which is in the SNMP agent's space
> without actually being that agent. If you are talking about an
> embedded system with a flat global address space, this is easy.
> Otherwise you may find it best to include your piece of enquiry code
> in your agent
>
> It doesn't sound important to me at all, but this is how you do it
>
> you don't use SNMP's sockets. You use one of the other 60000
> available socket addresses on the target system
>
> It will be easiest if your new piece of code is a thread of the agent
>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <errno.h>
>
> static struct sockaddr_in here = { AF_INET,
> HTONS(A_NICE_PORT_NUMBER_MAYBE_44004) } ;
> static struct sockaddr_in there = { AF_INET } ;
> static int sixteen = 16;
>
> void listener()
> {
> int s = socket(AF_INET, SOCK_DGRAM);
> int x = bind(s, (struct sockaddr *) &here, 16);
>
> char data[DATA];
>
> if (s < 0) printf("yon's mingin\n");
> else
> {
> if (x < 0) printf("yon's awfu\n");
> else
> {
> for (;;)
> {
> x = recvfrom(s, data, DATA, 0, (struct sockaddr *)
> &there, &sixteen);
> if (x < 0) break
>
> /************************************************************************
>
> find your data and format your response
>
> ************************************************************************/
>
> x = send(s, data, HOWEVER_LONG_YOUR_RESPONSE_IS, 0,
> (struct sockaddr *) &there, 16);
> }
>
> printf("listener stopped %d\n", errno);
> }
> }
> }
>
> and you need something in your GUI program to call this listener.
> Decide for yourself if it should block on response. I don't advise
> it. But I don't advise you to make this feature of your application
> so important in the first place
>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <errno.h>
>
> int requestor(char *data)
> {
> static struct sockaddr_in there = { AF_INET,
> HTONS(A_NICE_PORT_NUMBER_MAYBE_44004),
> {
> REMOTE_NETWORK_ADDRESS } } ;
> static struct sockaddr_in here = { AF_INET } ;
> static int sixteen = 16;
>
> static int s = -1;
>
> int x;
>
>
> if (s < 0)
> {
> s = socket(AF_INET, SOCK_DGRAM);
>
> if (s < 0) return -1;
>
> x = bind(s, (struct sockaddr *) &here, 16);
> if (x < 0)
> {
> s = -1;
> return -2
> }
> }
>
> x = sendto(s, data, sizeof(enquiry), 0, (struct sockaddr *)
> &there, 16);
> of (x < 0) return -3;
> x = recvfrom(s, data, MAXIMUM, 0, (struct sockaddr *), &there,
> &sixteen);
> if (x < 0) return -4;
> return x;
> }
>
>
>
>
> Am 02.05.2013 um 08:39 schrieb Gustav Evertsson:
>
> >
> > Can you describe the socket method a bit more? I have tested to
> implement it with these calls, but that will increase the counters:
> >
> > snmp_sess_init( &session );
> > session.peername = "127.0.0.1";
> > ....
> > SOCK_STARTUP;
> > ss = snmp_open(&session);
> > snmp_synch_response(ss, pdu, &response);
> > snmp_close(ss);
> > SOCK_CLEANUP;
> >
> > /Gustav
> >
> > On Tue, 30 Apr 2013 15:44:56 +0200 (CEST)
> > "Tim Cox" <timmiles...@gmx.ch> wrote:
> > > If this is really so important access the MIB
> variables
> > > from a socket program or decrement the send and receive
> counts by
> > > 1 between acquiring and displaying (you need a running count of
> > > course) Gesendet: Dienstag, 30. April 2013 um 15:35 Uhr
> Von:
> > > "Gustav Evertsson" <m...@guzzzt.com> An: "Tim Cox"
> <timmiles...@gmx.ch>
> > > Cc: net-snmp-coders@lists.sourceforge.net Betreff: Re: Access the
> > > SNMP Counters without increasing them Yes, the problem is that
> they
> > > are increased when read from the GUI. They should only be
> increased
> > > when read from SNMP. When the user opens the GUI it is not
> visible
> > > that the counters comes from the SNMP interface and it therefore
> > > looks strange to the user. I could inform them that the request
> goes
> > > over SNMP and is therefore included but I would rather access the
> > > counters in a way that does not affect them. /Gustav On Tue,
> 30
> > > Apr 2013 13:10:11 +0200 (CEST) "Tim Cox" <timmiles...@gmx.ch>
> wrote:
> > > > It depends how your MIB is implemented You may be
> able
> > > to > see these counters from a simple socket application, maybe
> not >
> > > But how can it be so important? It should be reassuring that
> your
> > > > enquiry traffic is also shown. Do you want to avoid
> incrementing
> > > the > interface counters as well? Gesendet:
> Dienstag,
> > > 30. > April 2013 um 09:47 Uhr Von: "Gustav Evertsson"
> <m...@guzzzt.com>
> > > An: > net-snmp-coders@lists.sourceforge.net Betreff: Access the
> SNMP
> > > > Counters without increasing them I am developing an
> application >
> > > that have both an SNMP interface and a GUI. I would like to
> access >
> > > the SNMP counters like snmpInPkts, snmpOutPkts etc to show in the
> >
> > > GUI. I have tested to send SNMP request to localhost and it works
> but
> > > > it also increases the counters and is therefore not so nice. >
> > > Reloading the GUI will show increased counters even if there has
> been
> > > > no outside SNMP requests. Is there a way to access these
> counters
> > > by > some API call instead? I9m interested in the counters under
> >
> > > 1.3.6.1.2.1.11 and 1.3.6.1.6.3.15.1.1 and 1.3.6.1.6.3.11.2.1.
> > >
> >
>
My main issue is not to send the data to the GUI, the problem is to get it out of the net-snmp library. The "find your data" part in your suggestion. How do I read snmpInPkts, snmpOutPkts etc out of the library from C function calls?
/Gustav
On Thu, 2 May 2013 23:44:26 +0200
Tim Cox <timmiles...@gmx.ch> wrote:
>
>
>
> It really depends on being able to see your agent's data from a
> program which is not itself SNMP and using sockets which are not
> SNMP's sockets
>
> I'm assuming you are talking about two different machines, one
> containing an agent and the other a manager
>
> You want to interrogate data which is in the SNMP agent's space
> without actually being that agent. If you are talking about an
> embedded system with a flat global address space, this is easy.
> Otherwise you may find it best to include your piece of enquiry code
> in your agent
>
> It doesn't sound important to me at all, but this is how you do it
>
> you don't use SNMP's sockets. You use one of the other 60000
> available socket addresses on the target system
>
> It will be easiest if your new piece of code is a thread of the agent
>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <errno.h>
>
> static struct sockaddr_in here = { AF_INET,
> HTONS(A_NICE_PORT_NUMBER_MAYBE_44004) } ;
> static struct sockaddr_in there = { AF_INET } ;
> static int sixteen = 16;
>
> void listener()
> {
> int s = socket(AF_INET, SOCK_DGRAM);
> int x = bind(s, (struct sockaddr *) &here, 16);
>
> char data[DATA];
>
> if (s < 0) printf("yon's mingin\n");
> else
> {
> if (x < 0) printf("yon's awfu\n");
> else
> {
> for (;;)
> {
> x = recvfrom(s, data, DATA, 0, (struct sockaddr *)
> &there, &sixteen);
> if (x < 0) break
>
> /************************************************************************
>
> find your data and format your response
>
> ************************************************************************/
>
> x = send(s, data, HOWEVER_LONG_YOUR_RESPONSE_IS, 0,
> (struct sockaddr *) &there, 16);
> }
>
> printf("listener stopped %d\n", errno);
> }
> }
> }
>
> and you need something in your GUI program to call this listener.
> Decide for yourself if it should block on response. I don't advise
> it. But I don't advise you to make this feature of your application
> so important in the first place
>
> #include <sys/socket.h>
> #include <netinet/in.h>
> #include <errno.h>
>
> int requestor(char *data)
> {
> static struct sockaddr_in there = { AF_INET,
> HTONS(A_NICE_PORT_NUMBER_MAYBE_44004),
> {
> REMOTE_NETWORK_ADDRESS } } ;
> static struct sockaddr_in here = { AF_INET } ;
> static int sixteen = 16;
>
> static int s = -1;
>
> int x;
>
>
> if (s < 0)
> {
> s = socket(AF_INET, SOCK_DGRAM);
>
> if (s < 0) return -1;
>
> x = bind(s, (struct sockaddr *) &here, 16);
> if (x < 0)
> {
> s = -1;
> return -2
> }
> }
>
> x = sendto(s, data, sizeof(enquiry), 0, (struct sockaddr *)
> &there, 16);
> of (x < 0) return -3;
> x = recvfrom(s, data, MAXIMUM, 0, (struct sockaddr *), &there,
> &sixteen);
> if (x < 0) return -4;
> return x;
> }
>
>
>
>
> Am 02.05.2013 um 08:39 schrieb Gustav Evertsson:
>
> >
> > Can you describe the socket method a bit more? I have tested to
> implement it with these calls, but that will increase the counters:
> >
> > snmp_sess_init( &session );
> > session.peername = "127.0.0.1";
> > ....
> > SOCK_STARTUP;
> > ss = snmp_open(&session);
> > snmp_synch_response(ss, pdu, &response);
> > snmp_close(ss);
> > SOCK_CLEANUP;
> >
> > /Gustav
> >
> > On Tue, 30 Apr 2013 15:44:56 +0200 (CEST)
> > "Tim Cox" <timmiles...@gmx.ch> wrote:
> > > If this is really so important access the MIB
> variables
> > > from a socket program or decrement the send and receive
> counts by
> > > 1 between acquiring and displaying (you need a running count of
> > > course) Gesendet: Dienstag, 30. April 2013 um 15:35 Uhr
> Von:
> > > "Gustav Evertsson" <m...@guzzzt.com> An: "Tim Cox"
> <timmiles...@gmx.ch>
> > > Cc: net-snmp-coders@lists.sourceforge.net Betreff: Re: Access the
> > > SNMP Counters without increasing them Yes, the problem is that
> they
> > > are increased when read from the GUI. They should only be
> increased
> > > when read from SNMP. When the user opens the GUI it is not
> visible
> > > that the counters comes from the SNMP interface and it therefore
> > > looks strange to the user. I could inform them that the request
> goes
> > > over SNMP and is therefore included but I would rather access the
> > > counters in a way that does not affect them. /Gustav On Tue,
> 30
> > > Apr 2013 13:10:11 +0200 (CEST) "Tim Cox" <timmiles...@gmx.ch>
> wrote:
> > > > It depends how your MIB is implemented You may be
> able
> > > to > see these counters from a simple socket application, maybe
> not >
> > > But how can it be so important? It should be reassuring that
> your
> > > > enquiry traffic is also shown. Do you want to avoid
> incrementing
> > > the > interface counters as well? Gesendet:
> Dienstag,
> > > 30. > April 2013 um 09:47 Uhr Von: "Gustav Evertsson"
> <m...@guzzzt.com>
> > > An: > net-snmp-coders@lists.sourceforge.net Betreff: Access the
> SNMP
> > > > Counters without increasing them I am developing an
> application >
> > > that have both an SNMP interface and a GUI. I would like to
> access >
> > > the SNMP counters like snmpInPkts, snmpOutPkts etc to show in the
> >
> > > GUI. I have tested to send SNMP request to localhost and it works
> but
> > > > it also increases the counters and is therefore not so nice. >
> > > Reloading the GUI will show increased counters even if there has
> been
> > > > no outside SNMP requests. Is there a way to access these
> counters
> > > by > some API call instead? I9m interested in the counters under
> >
> > > 1.3.6.1.2.1.11 and 1.3.6.1.6.3.15.1.1 and 1.3.6.1.6.3.11.2.1.
> > >
> >
>
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