[AGENT++] help: problem about snmpV3 in hp-ux 11i

[Zheng Niejun]

Hi,
    Thank you for you precious advice.
    I try it, but I'm sorry I find nothing.
    In fact, when I move the follow loop to main thread, everything is good. The program can receive SNMPv1 & SNMPv3 get request. But when I move the loop to a new thread which created by pthread_create call,  the program is ok when it receives SNMPv1 get request. But to my surprise, it will CORE down when it recievies SNMPv3 get request.
    while (run) {  
          req = reqList->receive(2);
          if (req) {
              mib->process_request(req);
          }
          else {
              mib->cleanup();
          }
    }

    Could you give me more advice?
    Regards,
        Zheng Niejun


From: Jochen Katz <katz at agentpp.com>
Subject: Re: [AGENT++] help: problem about snmpV3 in hp-ux 11i
To: agentpp at agentpp.org
Message-ID: <4347D23B.2080502 at 2004.joka.homelinux.org>
Content-Type: text/plain; charset=us-ascii

Hi,

> I just want to know if anyone tests SNMPv3 with pthread in HP-UX 11i. I use aCC compiler
> with compile options "-AA +DAportable -D_REENTRANT -D_RWSTD_MULTI_THREAD".
> Maybe something wrong with compile options or link options? but it's OK when receiving SNMPv1 request.

>>> Program received signal SIGBUS, Bus error.
>>> 0xaa7e0 in USM::build_sec_params (this=0x40031770, outBuf=0x7a20642c "",

>>> 2213      unsigned char *bufPtr = (unsigned char*)&buf;

these are the lines of code (which are only executed for v3 requests):

  unsigned char buf[MAXLENGTH_BUFFER];
  unsigned char *bufPtr = (unsigned char*)&buf;

Should this cause any alignment issues (searching for "hp-ux sigbus"
finds such hints)?

Regards,
  Jochen

> Hi all,
>     I compile snmp++ 3.2.16 & agent++ 3.5.22c with macro '_NO_THREADS' in hp-ux 11i.
> i try to run an example of agent++. It seems OK. I then modify the example by adding 
> a thread and make it receive snmp request in the thread, and run again. When it 
> receives snmpV1 request, it is OK. But when it reveives snmpV3 request, it core down!
>     
>     I debug it. The detail is as follow:
> Program received signal SIGBUS, Bus error.
> 0xaa7e0 in USM::build_sec_params (this=0x40031770, outBuf=0x7a20642c "",
>     maxLength=0x7a207438, sp={
>       msgAuthoritativeEngineID = "\200\000\023p\005socagent\006M\000\000\000\000\004\000\000\000\017\000\000\0000z Bt", msgAuthoritativeEngineIDLength = 15,
>       msgAuthoritativeEngineBoots = 0, msgAuthoritativeEngineTime = 0,
>       msgUserName = "\000\t\262#\000\t\261\353", '\000' <repeats 16 times>, "z \021@\000\000\000", msgUserNameLength = 0, msgAuthenticationParameters = 0x0,
>       msgAuthenticationParametersLength = 0, msgPrivacyParameters = 0x0,
>       msgPrivacyParametersLength = 0}, position=0x7a2052e0) at usm_v3.cpp:2213
> 2213      unsigned char *bufPtr = (unsigned char*)&buf;
>      
>     Thank you so much for your time.
>     Best regards. 
>         steed.
> _______________________________________________