Re: Failed to connect to the agentx master agent

#1 (**permalink**) 12-06-2006

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hello friends
for finding reason for this failure i found that
following function get call when i call init_agent
init_agent
|--subagent_pre_init
|--agentx_reopen_session
|--subagent_open_master_session
|---snmp_open_ex
|---snmp_sess_open
|-- _sess_open

|---netsnmp_tdomain_transport
netsnmp_tdomain_transport called as follows
slp->transport = netsnmp_tdomain_transport
& this netsnmp_tdomain_transport function fails it returns NULL
because of this session not get completed & so by this flow of code
if (main_session == NULL) {
printf("\n Failure snmp_open_ex\n\n");
}
if (main_session == NULL) {
/*
* Diagnose snmp_open errors with the input
* netsnmp_session pointer.
*/
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID ,
NETSNMP_DS_AGENT_NO_CONNECTION_WARNINGS)) {
char buf[1024];
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID ,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
snprintf(buf, sizeof(buf), "Warning: "
"Failed to connect to the agentx master agent
(%s)",
sess.peername);
netsnmp_sess_log_error(LOG_WARNING, buf, &sess);
} else {
snprintf(buf, sizeof(buf), "Error: "
"Failed to connect to the agentx master agent
(%s)",
sess.peername);
snmp_sess_perror(buf, &sess);
}
}

i get "Failed to connect to the agentx master agent" message
so what may be the problem ?
one more thing i understand that
if (session->flags & SNMP_FLAGS_STREAM_SOCKET)
this condition always get executed to true part of above if
so when i set udp in
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,NE TSNMP_DS_AGENT_X_SOCKET,
"udp:localhost:705");
or
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_X_SOCKET,
"tcp:localhost:705");
it always execute true part of if i.e for TCP case
What is the problem here ?

Thanks in advance
Regards
Bhushan E. Sonawane

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hello friends for finding reason for this failure i found that follo=
wing function get call when i call init_agent init_agent |--subagent_=
pre_init       &n bsp;   &nb=
sp;     |--agentx_reopen_session    &=
nbsp;       &nb sp;   &nbs=
p;             |--sub=
agent_open_master_session
        &nbs p;   &nbsp=
;        & nbsp;   &n=
bsp;       &nbs p;   |---snmp_o=
pen_ex       &nbs p;   &nbsp=
;        & nbsp;   &n=
bsp;       &nbs p;   &nbsp=
;        & nbsp;  |---snmp_sess=
_open       &nbsp ;    =
        &n bsp;   &nb=
sp;       &nbsp ;    =
        &n bsp;   &nb=
sp;      |-- _sess_open    &nbsp=
;        & nbsp;   &n=
bsp;       &nbs p;   &nbsp=
;        & nbsp;   &n=
bsp;       &nbs p;   &nbsp=
;           |---netsnmp_tdomain_transpor=
t
 netsnmp_tdomain_transport called as follows slp->transport =3D ne=
tsnmp_tdomain_transport & this netsnmp_tdomain_transport function fa=
ils it returns NULL because of this session not get completed & so =
by this flow of code
 if (main_session =3D=3D NULL) {     printf("\n F=
ailure snmp_open_ex\n\n");     }   &nbs=
p; if (main_session =3D=3D NULL) {       &=
nbsp; /*        &nb sp; * Diagnose snm=
p_open errors with the input       &nbsp ;&=
nbsp; * netsnmp_session pointer. =20
        &nbs p; */   &nbs=
p;     if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATI=
ON_ID, NETSNMP_DS_AGENT_NO_CONNECTION_WARNINGS)) {    &nb=
sp;        char buf[1024];  &nbs=
p;           if (!netsnmp_ds_ge=
t_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
        &nbs p;   &nbsp=
;    snprintf(buf, sizeof(buf), "Warning: " &nb=
sp;       &nbsp ;    =
        &n bsp;   "Fa=
iled to connect to the agentx master agent (%s)",   &nbsp=
;        & nbsp;   &n=
bsp;       &nbs p; sess.peername); &nb=
sp;       &nbsp ;    =
   netsnmp_sess_log_error(LOG_WARNING, buf, &sess);
        &nbs p;    } el=
se {        &nb sp;   &=
nbsp;    snprintf(buf, sizeof(buf), "Error: " &=
nbsp;       &nb sp;   &nbs=
p;             "=
Failed to connect to the agentx master agent (%s)",   &nb=
sp;       &nbsp ;    =
        &n bsp; sess.peername
);        &n bsp;   &nb=
sp;    snmp_sess_perror(buf, &sess);   &nbs=
p;       &nbsp ; }    &=
nbsp;    }         <br=
> i get "Failed to connect to the agentx master agent" messa=
ge so what may be the problem ? one more thing i understand that=20
 if (session->flags & SNMP_FLAGS_STREAM_SOCKET) this conditio=
n always get executed to true  part of above if so when i set udp =
in netsnmp_ds_set_string(NETSNMP_DS_APPLICATION _ID,NETSNMP_DS_AGENT_X_SO=
CKET, "udp:localhost:705");
 or netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_I D, NETSNMP_DS_AGEN=
T_X_SOCKET, "tcp:localhost:705");
 it always execute true part of if i.e for  TCP case What is th=
e problem here ? Thanks in advance Regards Bhushan E. Sonawane=
 

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