I noticed if I change MasterAgent address with help of
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET,...) function then the new address is used in case
connection is broken between master- and sub- agents.
So, in order to change master address there is a need to set a new address
and break the connection.
Question: how to break connection in code, with help of net-snmp library
functions to apply a new address?
snmp_shutdown(...) is not right function because it shutdowns subagent
forever, as I understand. But I would like to break connection for a few
milliseconds.
2009/2/2 Alexander Bubnov <[email protected]>
> Hello!
>
> I would like to change subagent settings in runtime, for example by HUP
> signal.
>
> Settings are MasterAgent address, port and subagent ping interval.
>
> I tried:
>
> int main()
>
> {
>
> ...
>
> init_agent("example-demon");
>
> init_snmp("example-demon");
>
> ...
>
> }
>
> void OnHupSignal() /*just an example, not real code*/
>
> {
>
> /* CLOSE CONNECTION */
>
> snmp_shutdown("example-demon");
>
> /* CHANGE SETTINGS */
>
> netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_X_SOCKET,
> address.c_str());
>
> netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
> NETSNMP_DS_AGENT_AGENTX_PING_INTERVAL, interval);
>
> /* INIT AGAIN */
>
> init_agent("example-demon");
>
> init_snmp("example-demon");
>
> }
>
> reconnection is done by init_snmp function(). But that function can be run
> once only, see below:
>
> void
> init_snmp(const char *type)
> {
> static int done_init = 0; /* To prevent double init's. */
>
> if (done_init) {
> return;
> }
>
> done_init = 1;
> ...
>
> Is it possible to reconnect to MasterAgent in another way (without help of
> exec(), fork() and etc.)? How to change settings correctly?
>
> Thanks in advance.
> --
> /BR, Alexander
>
--
/BR, Alexander
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