hi,all!
Very thank you for the reply! With it ,i solved that problem! thank you Dave and net-snmp again!
but i got another problem.after my simple test mib(jmtest) mentioned last time,i tried another much more complex mib(m3uaMIB,it's almost a standard mib ,so you can see it at IETF website).i did the similar modifying to the files generated by mib2c as the simple test mib (jmtest),but it's odd that when i snmpwalk it i got such result(why m3uaManagement became the leaf nod?):
but i got another problem.after my simple test mib(jmtest) mentioned last time,i tried another much more complex mib(m3uaMIB,it's almost a standard mib ,so you can see it at IETF website).i did the similar modifying to the files generated by mib2c as the simple test mib (jmtest),but it's odd that when i snmpwalk it i got such result(why m3uaManagement became the leaf nod?):
[EMAIL PROTECTED] root]# snmpwalk -v 1 -c public localhost m3uaMIB
M3UA-MIB::m3uaManagement.0 = Gauge32: 200
M3UA-MIB::m3uaConformance.0 = INTEGER: 2
M3UA-MIB::m3uaMIB.3.0 = Gauge32: 2905
M3UA-MIB::m3uaMIB.4.0 = Gauge32: 123
M3UA-MIB::m3uaMIB.5.0 = Gauge32: 1
M3UA-MIB::m3uaMIB.6.0 = INTEGER: 1
M3UA-MIB::m3uaMIB.7.0 = Gauge32: 20
M3UA-MIB::m3uaManagement.0 = Gauge32: 200
M3UA-MIB::m3uaConformance.0 = INTEGER: 2
M3UA-MIB::m3uaMIB.3.0 = Gauge32: 2905
M3UA-MIB::m3uaMIB.4.0 = Gauge32: 123
M3UA-MIB::m3uaMIB.5.0 = Gauge32: 1
M3UA-MIB::m3uaMIB.6.0 = INTEGER: 1
M3UA-MIB::m3uaMIB.7.0 = Gauge32: 20
and i also paste my snmptranslate result and modified codes(because the mib is so large,so i just paste part of them);i just give part of values of the mib for test,and comment out other values ! note that this complex mib is with both scalars and tables,and is there something particular to modify such mib codes generated by mib2c?
+--m3uaMIB(31)
|
+--m3uaManagement(1)
| |
| +--m3uaAttributes(1)
| | |
| | +--m3uaConfig(1)
| | | |
| | | +-- -R-- Unsigned m3uaVersion(1)
| | | +-- -R-- EnumVal m3uaProcType(2)
| | | | Values: sgp(1), asp(2), ipsp(3)
| | | +-- -R-- Unsigned m3uaLocalPort(3)
| | | +-- -RW- Unsigned m3uaTrValue(4)
| | | +-- -RW- Unsigned m3uaTPaudValue(5)
| | | +-- -RW- EnumVal m3uaHeartBeat(6)
| | | | Values: on(0), off(1)
| | | +-- -RW- Unsigned m3uaTBeatValue(7)
|
+--m3uaManagement(1)
| |
| +--m3uaAttributes(1)
| | |
| | +--m3uaConfig(1)
| | | |
| | | +-- -R-- Unsigned m3uaVersion(1)
| | | +-- -R-- EnumVal m3uaProcType(2)
| | | | Values: sgp(1), asp(2), ipsp(3)
| | | +-- -R-- Unsigned m3uaLocalPort(3)
| | | +-- -RW- Unsigned m3uaTrValue(4)
| | | +-- -RW- Unsigned m3uaTPaudValue(5)
| | | +-- -RW- EnumVal m3uaHeartBeat(6)
| | | | Values: on(0), off(1)
| | | +-- -RW- Unsigned m3uaTBeatValue(7)
m3uaMIB.c:
.
.
.
switch (vp->magic) {
case M3UAVERSION:
*var_len=sizeof(long);
long_ret=200;
return (u_char *) & long_ret;
case M3UAPROCTYPE:
long_ret= 2; //sgp(1)asp(2) ipsp(3)
*var_len=sizeof(long);
return (u_char *) & long_ret;
case M3UALOCALPORT:
*var_len=sizeof(long);
long_ret=2905;
return (u_char *) & long_ret;
case M3UATRVALUE:
*write_method = write_m3uaTrValue;
*var_len=sizeof(long);
long_ret=123;
return (u_char *) & long_ret;
case M3UATPAUDVALUE:
*write_method = write_m3uaTPaudValue;
//VAR = VALUE; /* XXX */
//return (u_char *) & VAR;
case M3UAHEARTBEAT:
*write_method = write_m3uaHeartBeat;
*var_len=sizeof(long);
long_ret=1;//heartbeat on(0),off(1)
return (u_char *) & long_ret;
case M3UATBEATVALUE:
*write_method = write_m3uaTBeatValue;
*var_len=sizeof(long);
long_ret=20;
return (u_char *) & long_ret;
case M3UAVERSION:
*var_len=sizeof(long);
long_ret=200;
return (u_char *) & long_ret;
case M3UAPROCTYPE:
long_ret= 2; //sgp(1)asp(2) ipsp(3)
*var_len=sizeof(long);
return (u_char *) & long_ret;
case M3UALOCALPORT:
*var_len=sizeof(long);
long_ret=2905;
return (u_char *) & long_ret;
case M3UATRVALUE:
*write_method = write_m3uaTrValue;
*var_len=sizeof(long);
long_ret=123;
return (u_char *) & long_ret;
case M3UATPAUDVALUE:
*write_method = write_m3uaTPaudValue;
//VAR = VALUE; /* XXX */
//return (u_char *) & VAR;
case M3UAHEARTBEAT:
*write_method = write_m3uaHeartBeat;
*var_len=sizeof(long);
long_ret=1;//heartbeat on(0),off(1)
return (u_char *) & long_ret;
case M3UATBEATVALUE:
*write_method = write_m3uaTBeatValue;
*var_len=sizeof(long);
long_ret=20;
return (u_char *) & long_ret;
.
.
.
at last i want to offer my question about the C code for set action generated by mib2c,in "write_***** "function i saw that the definition of variable"value" is just "long value;" why not "static long value"?because if i use this variable in case ACTION,it will change since i just "value = *(long *) var_val;" in case RESERVE2;i'm puzzle about
that.why?
thanks!
On 7/26/06, Dave Shield <*****@csc.liv.ac.uk> wrote:
On 26/07/06, <Qiang Hu> <[EMAIL PROTECTED]> wrote:
> unsigned char *
> var_jmtest(...)
> {
> static long long_ret;
> int VAR;
> switch (vp->magic) {
> case FIRSTKEY:
> *write_method = write_firstKey;
> VAR = 1; /* XXX */
> *var_len =sizeof(VAR);
> return (u_char *) & VAR;
Two comments.
a) "VAR" *must* be declared as "static", if you are going to return a
reference to it, which will then be accessed by external code. This
is probably why you are getting different results each time.
b) The old API (and probably the new one too), expects to use 'long'
variables for integer values. Why not just use the 'long_ret'
variable that has already been declared for you?
It *might* not matter if you use int instead, but I wouldn't like to
make any promises.
I'd suggest you play safe and use 'long_ret'.
Dave
--
Qiang
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