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snmp-query-engine's Issues

Example for TCP Client, response return "Request is not an array"

I would like to write a TCP Client in nodejs to communicate with snmp-query-engine but the response return:
[ 32, 0, "Request is not an array"]

The TCP Client:

var net = require('net');

var HOST = 'localhost';
var PORT = 7667;

var client = new net.Socket();

client.connect(PORT, HOST, function() {
    console.log('Client connected to: ' + HOST + ':' + PORT);

    //[0, 1, "127.0.0.1", 161, "1.3.6.1.2.1.25.1.1.0"]
    var data = '[149, 0, 1, 169, 49, 50, 55, 46, 48, 46, 48, 46, 49, 204, 161, 180, 49, 46, 51, 46, 54, 46, 49, 46, 50, 46, 49, 46, 50, 53, 46, 49, 46, 49, 46, 48]'
    client.write(data);
});

client.on('data', function(data) {
    console.log("Return: " + data);
     if (data.toString().endsWith('exit')) {
       client.destroy();
    }
});

client.on('close', function() {
    console.log('Client closed');
});

client.on('error', function(err) {
    console.error(err);
});

I encoded the request by this site.
Please help.

Fail to compile with msgpack for C/C++ Version 2.1.5 

cc -c -Wall -Wno-unused-function -Werror -O3 -g -I/usr/local/include -I/opt/local/include -o util.o util.c
util.c:16:17: error: use of undeclared identifier 'MSGPACK_OBJECT_RAW'; did you mean 'MSGPACK_OBJECT_MAP'?
        if (o->type != MSGPACK_OBJECT_RAW)
                       ^~~~~~~~~~~~~~~~~~
                       MSGPACK_OBJECT_MAP
/usr/local/include/msgpack/object.h:38:5: note: 'MSGPACK_OBJECT_MAP' declared here
    MSGPACK_OBJECT_MAP                  = 0x07,
    ^
util.c:19:20: error: no member named 'raw' in 'msgpack_object_union'
        s = malloc(o->via.raw.size + 1);
                   ~~~~~~ ^
util.c:21:48: error: no member named 'raw' in 'msgpack_object_union'
                croak(1, "object_strdup: malloc(%d)", o->via.raw.size + 1);
                                                      ~~~~~~ ^
util.c:22:19: error: no member named 'raw' in 'msgpack_object_union'
        memcpy(s, o->via.raw.ptr, o->via.raw.size);
                  ~~~~~~ ^
/usr/include/secure/_string.h:65:33: note: expanded from macro 'memcpy'
  __builtin___memcpy_chk (dest, src, len, __darwin_obsz0 (dest))
                                ^
util.c:22:35: error: no member named 'raw' in 'msgpack_object_union'
        memcpy(s, o->via.raw.ptr, o->via.raw.size);
                                  ~~~~~~ ^
/usr/include/secure/_string.h:65:38: note: expanded from macro 'memcpy'
  __builtin___memcpy_chk (dest, src, len, __darwin_obsz0 (dest))
                                     ^
util.c:23:11: error: no member named 'raw' in 'msgpack_object_union'
        s[o->via.raw.size] = 0;
          ~~~~~~ ^
util.c:31:7: error: use of undeclared identifier 'MSGPACK_OBJECT_RAW'; did you mean 'MSGPACK_OBJECT_MAP'?
        case MSGPACK_OBJECT_RAW:
             ^~~~~~~~~~~~~~~~~~
             MSGPACK_OBJECT_MAP
/usr/local/include/msgpack/object.h:38:5: note: 'MSGPACK_OBJECT_MAP' declared here
    MSGPACK_OBJECT_MAP                  = 0x07,
    ^
util.c:32:14: error: no member named 'raw' in 'msgpack_object_union'
                if (o->via.raw.size >= bufsize)    return NULL;
                    ~~~~~~ ^
util.c:33:20: error: no member named 'raw' in 'msgpack_object_union'
                memcpy(s, o->via.raw.ptr, o->via.raw.size);
                          ~~~~~~ ^
/usr/include/secure/_string.h:65:33: note: expanded from macro 'memcpy'
  __builtin___memcpy_chk (dest, src, len, __darwin_obsz0 (dest))
                                ^
util.c:33:36: error: no member named 'raw' in 'msgpack_object_union'
                memcpy(s, o->via.raw.ptr, o->via.raw.size);
                                          ~~~~~~ ^
/usr/include/secure/_string.h:65:38: note: expanded from macro 'memcpy'
  __builtin___memcpy_chk (dest, src, len, __darwin_obsz0 (dest))
                                     ^
util.c:34:12: error: no member named 'raw' in 'msgpack_object_union'
                s[o->via.raw.size] = 0;
                  ~~~~~~ ^
util.c:51:17: error: use of undeclared identifier 'MSGPACK_OBJECT_RAW'; did you mean 'MSGPACK_OBJECT_MAP'?
        if (o->type != MSGPACK_OBJECT_RAW) return 0;
                       ^~~~~~~~~~~~~~~~~~
                       MSGPACK_OBJECT_MAP
/usr/local/include/msgpack/object.h:38:5: note: 'MSGPACK_OBJECT_MAP' declared here
    MSGPACK_OBJECT_MAP                  = 0x07,
    ^
util.c:53:13: error: no member named 'raw' in 'msgpack_object_union'
        if (o->via.raw.size != l) return 0;
            ~~~~~~ ^
util.c:54:24: error: no member named 'raw' in 'msgpack_object_union'
        return strncmp(o->via.raw.ptr, s, l) == 0;
                       ~~~~~~ ^
14 errors generated.
make: *** [util.o] Error 1

Hello

Your project is really amazing, recently I made my own snmp crawler for 20 million docsis devices, and I was surprised by the similarities of the techniques you applied.
Performing the UDP socket sharing is really the best solution.
I just missed a better control over using the UDP buffer (Linux: /proc/net/udp, Solaris: ioctl FIONREAD).
In the rest yours is superior.
Congratulations!

Response unreadable characters when request OID of MAC Address

Hi, I can get data about CPU load, uptime, disk space,... But when I try to get MAC Address (OID: 1.3.6.1.2.1.2.2.1.6.2), the response is some unreadable characters like below:

[ [ '1.3.6.1.2.1.2.2.1.6.2', '�P����' ] ]

This is my client:

var net = require('net');
var msgpack = require("msgpack-lite");

var SERVER_ADDRESS = 'localhost';
var SERVER_PORT = 7667;
var REMOTE_ADDRESS = '192.168.1.110';
var REMOTE_PORT = 161;

var client = new net.Socket();

client.connect(SERVER_PORT, SERVER_ADDRESS, function() {
    console.log('Client connected to: ' + SERVER_ADDRESS + ':' + SERVER_PORT);

    var buffer = msgpack.encode([4, 1, REMOTE_ADDRESS, REMOTE_PORT, [".1.3.6.1.2.1.2.2.1.6.2"]]);
    console.log("Client send: " + buffer);
    client.write(buffer);
});

client.on('data', function(data) {
    console.log("Client receive:");
    console.log(data);
    console.log(msgpack.decode(data)[2]);
    client.destroy();
});

client.on('close', function() {
    console.log('Client closed');
});

client.on('error', function(err) {
    console.error(err);
});

Checked with snmp command:

snmpwalk -v2c -c public localhost 1.3.6.1.2.1.2.2.1.6.2
IF-MIB::ifPhysAddress.2 = STRING: 0:c:29:cf:ad:48

Documentation for GETTABLE error responses

According to the manual entry for GETTABLE:

Possible errors are the same as in GET request, plus the following ...

However:

(1) When trying to retrieve a non-existent OID it just returns an empty list. Example: query IP-MIB::ipNetToPhysicalTable on a switch which doesn't implement it.

GET returns:
[20, 456, [['1.3.6.1.2.1.4.35', ['no-such-object']]]]

GETTABLE returns:
[21, 456, []]

Looking on the wire: the first case receives a response object which tcpdump decodes as noSuchObject; the second case just gives MIB values starting from the next available entry (in my test 1.3.6.1.2.1.5.1.0)

This suggests that getbulk can't distinguish "empty table" from "non-existent table", in which case the current SQE behaviour is reasonable, but I think this could be clarified in the documentation as the behaviour is different to GET.

(2) Forcing an error by issuing a GETTABLE request for OID "2", I get the following:

[37, 456, 'bad oid']

So the result code is there but not wrapped in an array, as it would be for GET. This conflicts with the manual which says:

The second element will either be a value, or an array with a single element. If it is an array, its only element will be an error description.

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