Re: Problems with async
On Thu, Mar 20, 2014 at 03:01:21PM +, Pentasuglia, Corey wrote: Thanks again for the response Niels. I hope you don't mind me throwing one more at you. Is there a good way to take the value/values that are returned and convert them into strings (if they are of different snmp types)? Given the example below it seems like I'd have to have a case statement, but is there an easier way? man netsnmp_varbind_api You probably want snprint_variable or snprint_value. /Niels -- Niels Baggesen - @home - Århus - Denmark - n...@users.sourceforge.net The purpose of computing is insight, not numbers --- R W Hamming -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
RE: Problems with async
Thanks again for the response Niels. I hope you don't mind me throwing one more
at you. Is there a good way to take the value/values that are returned and
convert them into strings (if they are of different snmp types)? Given the
example below it seems like I'd have to have a case statement, but is there an
easier way?
-Original Message-
From: Niels Baggesen [mailto:n...@users.sourceforge.net]
Sent: Wednesday, March 19, 2014 4:18 PM
To: Pentasuglia, Corey
Cc: net-snmp-coders
Subject: Re: Problems with async
Den 19-03-2014 20:27, Pentasuglia, Corey skrev:
Say I get the system description:
SNMPv2-MIB::sysDescr.0 = STRING: Linux system.name kernel#...so on How
can I just retrieve what comes have STRING: and store it off in I a string?
if (vars-type == ASN_OCTET_STR) {
char *str = malloc(vars-val_len+1);
memcpy(str, vars-val.string, vars-val_len);
str[vars-val_len] = '\0';
...
/Niels
--
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RE: Problems with async
Thanks for the response Niels! I was actually missing that entire loop as I thought it wasn't necessary for my case. I added in the loop as shown in the async example and now everything works! Would you happen to know the best way to get the value of the response? Right now I am using print_variable to see the results. Ex. Say I get the system description: SNMPv2-MIB::sysDescr.0 = STRING: Linux system.name kernel#...so on How can I just retrieve what comes have STRING: and store it off in I a string? Thanks! Corey -Original Message- From: Niels Baggesen [mailto:n...@users.sourceforge.net] Sent: Tuesday, March 18, 2014 5:40 PM To: Pentasuglia, Corey; net-snmp-coders@lists.sourceforge.net Subject: Re: Problems with async Den 17-03-2014 12:54, Pentasuglia, Corey skrev: Is there anything I'm missing here? This app is in c++, so the callback is the only method that is declared with extern C. If this is incorrect please let me know. I am not setting the void*, because I don't need to send any data to the callback. As a starting point I have a debug point on the callback method that doesn't get hit. The snmp_async_send does not show any errors being sent. What is there looks OK, but I am missing the select loop that detects that responses have been received and calls snmp_read to handle them? Have you checked with tcpdump/wireshark that the packets are flowing? /Niels -- Niels Baggesen - @home - Århus - Denmark - n...@users.sourceforge.net The purpose of computing is insight, not numbers --- R W Hamming This message is intended only for the addressee and may contain information that is company confidential or privileged. Any technical data in this message may be exported only in accordance with the U.S. International Traffic in Arms Regulations (22 CFR Parts 120-130) or the Export Administration Regulations (15 CFR Parts 730-774). Unauthorized use is strictly prohibited and may be unlawful. If you are not the intended recipient, or the person responsible for delivering to the intended recipient, you should not read, copy, disclose or otherwise use this message. If you have received this email in error, please delete it, and advise the sender immediately. -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
Re: Problems with async
Den 19-03-2014 20:27, Pentasuglia, Corey skrev:
Say I get the system description:
SNMPv2-MIB::sysDescr.0 = STRING: Linux system.name kernel#...so on
How can I just retrieve what comes have STRING: and store it off in I a
string?
if (vars-type == ASN_OCTET_STR) {
char *str = malloc(vars-val_len+1);
memcpy(str, vars-val.string, vars-val_len);
str[vars-val_len] = '\0';
...
/Niels
--
Niels Baggesen - @home - Århus - Denmark - n...@users.sourceforge.net
The purpose of computing is insight, not numbers --- R W Hamming
--
Learn Graph Databases - Download FREE O'Reilly Book
Graph Databases is the definitive new guide to graph databases and their
applications. Written by three acclaimed leaders in the field,
this first edition is now available. Download your free book today!
http://p.sf.net/sfu/13534_NeoTech
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Re: Problems with async
Den 17-03-2014 12:54, Pentasuglia, Corey skrev: Is there anything I’m missing here? This app is in c++, so the callback is the only method that is declared with extern “C”. If this is incorrect please let me know. I am not setting the void*, because I don’t need to send any data to the callback. As a starting point I have a debug point on the callback method that doesn’t get hit. The snmp_async_send does not show any errors being sent. What is there looks OK, but I am missing the select loop that detects that responses have been received and calls snmp_read to handle them? Have you checked with tcpdump/wireshark that the packets are flowing? /Niels -- Niels Baggesen - @home - Århus - Denmark - n...@users.sourceforge.net The purpose of computing is insight, not numbers --- R W Hamming -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Net-snmp-coders mailing list Net-snmp-coders@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
