net-snmp

On 17/03/2008, Siva Prakash Reddy G <sivag@...> wrote:
>   I have written trap code, after compiling I'm getting error messages
> like as shown below.
>
>             Trap.o: In function `send_ampMemUtilization_trap':
> Trap.c:(.text+0x80): undefined reference to `snmp_varlist_add_variable'
> Trap.c:(.text+0xa4): undefined reference to `snmp_varlist_add_variable'
> Trap.c:(.text+0xac): undefined reference to `send_v2trap'

   [etc]

What command are you using to compile this application?

Dave

Hi!
	I'm using make file to compile.
	 Please go thru the make file as shown below.





CC     : = ${TOOLPATH} $(CROSS_COMPILE) gcc

NET_SNMP_VERSION = 5.1.2

PRESENT_PATH = $(shell pwd)

SNMP_PATH:= -I$(TOP_DIR)/../../../buildroot/build_armeb/net-snmp-
$(NET_SNMP_VERSION)/include

SNMP_DEP_FLAG:= -DDISABLE_TEMPLOWMARK_TRAP -DDISABLE_BBU_PRESENT_TRAP
-DDISABLE_BBU_ON_TRAP -DDISABLE_CPU_UTILIZATION_TRAP
-DDISABLE_MEMORY_UTILIZATION_TRAP

CFLAGS:=  -Wno-unknown-pragmas -Wno-format -O3

OBJ_DIR = obj

OBJS = Trap.o

all: Trap install

Trap:
        ${CC} ${CFLAGS} ${SNMP_DEP_FLAG} ${SNMP_PATH} -c Trap.c
        $(CC) $(CFLAGS) -o Trap Trap.o
 
install:
        test -d ${TARGET_DIR}/usr/lib || mkdir -p ${TARGET_DIR}/usr/lib
        cp -a Trap ${TARGET_DIR}/usr/lib/.

        test -d ${TARGET_DIR}/usr/share/snmp/mibs || mkdir -p
${TARGET_DIR}/usr/share/snmp/mibs

dirclean: clean

clean:
 	  -rm -rf core $(OBJ_DIR) *.o Trap
        rm -f $(TARGET_DIR)/usr/lib/Trap


		I don't know where I am doing wrong, please help me out.

  	 With Regards,
  G. Siva Prakash Reddy.


-----Original Message-----
From: dave.shield@... [mailto:dave.shield@...] On
Behalf Of Dave Shield
Sent: Monday, March 17, 2008 4:07 PM
To: Siva Prakash Reddy G
Cc: net-snmp-coders@...
Subject: Re: trap error message

On 17/03/2008, Siva Prakash Reddy G <sivag@...> wrote:
>   I have written trap code, after compiling I'm getting error messages
> like as shown below.
>
>             Trap.o: In function `send_ampMemUtilization_trap':
> Trap.c:(.text+0x80): undefined reference to
`snmp_varlist_add_variable'
> Trap.c:(.text+0xa4): undefined reference to
`snmp_varlist_add_variable'
> Trap.c:(.text+0xac): undefined reference to `send_v2trap'

   [etc]

What command are you using to compile this application?

Dave

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On 17/03/2008, Siva Prakash Reddy G <sivag@...> wrote:
>         I'm using make file to compile.
>          Please go thru the make file as shown below.
>

Two comments.

a)  You don't appear to be linking your application with the Net-SNMP
     library,   This would explain why it's not picking up the Net-SNMP
     library routines.

b)  The API call "send_v2trap" is part of the *agent* API.
     It can only be used within Net-SNMP Agent code.

You can't use this in client-side code.

Dave

Hi!
	Dave thanks for your reply.
	I don't understand first point that is.
	>> a) you don't appear to be linking your application with the
Net-		SNMP library, this would explain why it's not picking up
the 		Net-SNMP library routines.

		Let me explain about my code so that you can help me.

	 I have written infinte while loop that as shown below
	
main ()
{
        int tempVal = 45;

        while(1)
        {

#ifndef DISABLE_TEMPHIGMARK_TRAP
                if( tempVal > THRESHOLD_VALUE )
                        send_ampTempHighMark_trap( tempVal );
#endif

#ifndef DISABLE_TEMPLOWMARK_TRAP
                send_ampTempLowMark_trap( ampTempLowVal );
#endif

#ifndef DISABLE_BBU_PRESENT_TRAP
                send_ampBBUPresent_trap( ampBBuPreVal  );
#endif

#ifndef DISABLE_BBU_ON_TRAP
                send_ampBBUOn_trap( ampBBUonVal );
#endif

#ifndef DISABLE_CPU_UTILIZATION_TRAP
                send_ampCpuUtilization_trap(cpuUser, cpuSys, cpuIdle );
#endif

#ifndef DISABLE_MEMORY_UTILIZATION_TRAP
                send_ampMemUtilization_trap(  );
#endif

#ifndef DISABLE_HARADWARE_FAILURE_TRAP
                send_ampHardwareFailure_trap();
#endif

                sleep(30);
                tempVal++;
        }

	here you can see the routines like
send_ampTempHighMark_trap(tempVal);

Inside send_ampTempHighMark_trap( int tempVal ) this function,three
net-snmp
Routines I am using that is
	1. snmp_varlist_add_variable
      2. send_v2trap
      3. snmp_free_varbind.

	While compiling using make file I'm getting the error messages
as shown in the previous mails.

	Dave, hope my explanation is clear to help me.

	With Regards,
  G. Siva Prakash Reddy.



 

-----Original Message-----
From: dave.shield@... [mailto:dave.shield@...] On
Behalf Of Dave Shield
Sent: Monday, March 17, 2008 4:42 PM
To: Siva Prakash Reddy G
Cc: net-snmp-coders@...
Subject: Re: trap error message

On 17/03/2008, Siva Prakash Reddy G <sivag@...> wrote:
>         I'm using make file to compile.
>          Please go thru the make file as shown below.
>

Two comments.

a)  You don't appear to be linking your application with the Net-SNMP
     library,   This would explain why it's not picking up the Net-SNMP
     library routines.

b)  The API call "send_v2trap" is part of the *agent* API.
     It can only be used within Net-SNMP Agent code.

You can't use this in client-side code.

Dave

This email message and its attachments may contain CONFIDENTIAL AND PRIVILEGED INFORMATION intended for the sole use of the addressee(s). If you have received it in error, please contact the sender by return email, notify your system manager and destroy the original message and any copies thereof. Any review, use, disclosure or distribution is unlawful. Please check this email and any attachments for the presence of viruses. The Company accepts no  liability for any damage caused by any virus transmitted by this email. The views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of the company.
The Company reserves the right to monitor, review and store the content of all messages sent to or from this e-mail address.

 http://www.aztecsoft.com

On 17/03/2008, Siva Prakash Reddy G <sivag@...> wrote:
>         I don't understand first point that is.
>
>>> a) you don't appear to be linking your application with the
>>> Net-SNMP library


The Net-SNMP API routines are collected together into the
library 'libnetsnmp'.     So if you are writing an application
using these routines, you need to link it with this library,


Your makefile does not seem to link in *any* extra libraries,
so won't pick up these calls.


>  Inside send_ampTempHighMark_trap( int tempVal ) this function,three
>  net-snmp
>  Routines I am using that is
>         1. snmp_varlist_add_variable
>       2. send_v2trap

You cannot use this routine in a general application.
It is only available when developing a MIB module
within the agent.

Dave

Hi!
	Thanks Dave half a way it helped me, that I'm not linking
properly, now its working fine.
	But second point which you mentioned I don't understood.
	>> Inside send_ampTempHighMark_trap (int tempVal) this function,
three
	>> Net-SNMP Routines I am using that is
	>> 1. snmp_varlist_add_variable
	>> 2. send_v2trap

	>You cannot use this routine in a general application.
	>It is only available when developing a MIB module
	>within the agent.

	Then How to generate Trap code using MIB file, my mib file got
both that is trap information as well as manager request information.
Earlier what I have done is I wrote different mib file for trap and then
using 'mib2c.notify.conf' generated a trap code, generated code has
send_ampTempHighMark_trap in this function there are three net-snmp
routines are used as shown below.
	1. Snmp_varlist_add_varaiable
	2. Send_v2trap ()
      3. Freeing function.

	In this file I have added main function, in that main function i
am calling send_ampTempHighMark_trap function that's all i have done.
While compiling I'm getting errors as I have mentioned in earlier mails,
but these errors fixed know, after reading your earlier mails.

	Once again thank you for your constant support.
  
     With Regards,
G. Siva Prakash Reddy.

-----Original Message-----
From: dave.shield@... [mailto:dave.shield@...] On
Behalf Of Dave Shield
Sent: Monday, March 17, 2008 5:43 PM
To: Siva Prakash Reddy G
Cc: net-snmp-coders@...
Subject: Re: trap error message

On 17/03/2008, Siva Prakash Reddy G <sivag@...> wrote:
>         I don't understand first point that is.
>
>>> a) you don't appear to be linking your application with the
>>> Net-SNMP library


The Net-SNMP API routines are collected together into the
library 'libnetsnmp'.     So if you are writing an application
using these routines, you need to link it with this library,


Your makefile does not seem to link in *any* extra libraries,
so won't pick up these calls.


>  Inside send_ampTempHighMark_trap( int tempVal ) this function,three
>  net-snmp
>  Routines I am using that is
>         1. snmp_varlist_add_variable
>       2. send_v2trap

You cannot use this routine in a general application.
It is only available when developing a MIB module
within the agent.

Dave

This email message and its attachments may contain CONFIDENTIAL AND PRIVILEGED INFORMATION intended for the sole use of the addressee(s). If you have received it in error, please contact the sender by return email, notify your system manager and destroy the original message and any copies thereof. Any review, use, disclosure or distribution is unlawful. Please check this email and any attachments for the presence of viruses. The Company accepts no  liability for any damage caused by any virus transmitted by this email. The views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of the company.
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On 18/03/2008, Siva Prakash Reddy G <sivag@...> wrote:
>         >> Net-SNMP Routines I am using that is
>
>         >> 1. snmp_varlist_add_variable
>         >> 2. send_v2trap
>
>         >You cannot use this routine in a general application.
>         >It is only available when developing a MIB module
>         >within the agent.
>
>
>         Then How to generate Trap code using MIB file

You can use the rest of the output from mib2c.notify.conf,
but not the 'send_v2trap' call - this is *only* for use in the
SNMP agent.
   You must create a netsnmp_session structure, specifying
the trap destination and admin settings, and then call 'snmp_send'.
   See the code for 'snmptrap.c' for details.

Dave

Hi!
	Thank you very much for your constant support Dave.

	As you said I should create a netsnmp_session structure,
specifying the trap destination and admin settings and the call
snmp_send, till here it is fine.
	But how I'll create netsnmp_session structure is there any API
to this job, if there are, please let me know the API's.

	I have gone thru the file snmptrap.c file but it is like parsing
the command line argument provided by the user like
"snmptrap -v2c -c pubic trapIPAddress "" OID trapValueOID I trapValue",
It parses this line and fills the netsnmp_session structure. Hope
whatever I understood from the code is correct.

	Let me know how I will create an netsnmp_session structure by
specifying the required information.

	With Regards,
G. Siva Prakash Reddy.

-----Original Message-----
From: dave.shield@... [mailto:dave.shield@...] On
Behalf Of Dave Shield
Sent: Tuesday, March 18, 2008 7:27 PM
To: Siva Prakash Reddy G
Cc: net-snmp-coders@...
Subject: Re: trap error message

On 18/03/2008, Siva Prakash Reddy G <sivag@...> wrote:
>         >> Net-SNMP Routines I am using that is
>
>         >> 1. snmp_varlist_add_variable
>         >> 2. send_v2trap
>
>         >You cannot use this routine in a general application.
>         >It is only available when developing a MIB module
>         >within the agent.
>
>
>         Then How to generate Trap code using MIB file

You can use the rest of the output from mib2c.notify.conf,
but not the 'send_v2trap' call - this is *only* for use in the
SNMP agent.
   You must create a netsnmp_session structure, specifying
the trap destination and admin settings, and then call 'snmp_send'.
   See the code for 'snmptrap.c' for details.

Dave

This email message and its attachments may contain CONFIDENTIAL AND PRIVILEGED INFORMATION intended for the sole use of the addressee(s). If you have received it in error, please contact the sender by return email, notify your system manager and destroy the original message and any copies thereof. Any review, use, disclosure or distribution is unlawful. Please check this email and any attachments for the presence of viruses. The Company accepts no  liability for any damage caused by any virus transmitted by this email. The views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of the company.
The Company reserves the right to monitor, review and store the content of all messages sent to or from this e-mail address.

 http://www.aztecsoft.com