snmpset

(PHP 4, PHP 5, PHP 7, PHP 8)

snmpset — Set the value of an SNMP object

Açıklama

snmpset(
    string $hostname,
    string $community,
    array|string $object_id,
    array|string $type,
    array|string $value,
    int $timeout = -1,
    int $retries = -1
): bool

snmpset() is used to set the value of an SNMP object specified by the object_id.

Bağımsız Değişkenler

hostname

The hostname of the SNMP agent (server).

community

The write community.

object_id

The SNMP object id.

type

MIB her nesne kimliğini türünü tanımlar. Aşağıdaki listeden tek bir karakter olarak belirtilmelidir.

**types**
=	Tür MIB'den alınır.
i	INTEGER
u	INTEGER
s	STRING
x	HEX STRING
d	DECIMAL STRING
n	NULLOBJ
o	OBJID
t	TIMETICKS
a	IPADDRESS
b	BITS

SNMP kütüphanesi derlenirken OPAQUE_SPECIAL_TYPES tanımlanmışsa aşağıdakiler de geçerlidir:

**types**
U	unsigned int64
I	signed int64
F	float
D	double

Most of these will use the obvious corresponding ASN.1 type. 's', 'x', 'd' and 'b' are all different ways of specifying an OCTET STRING value, and the 'u' unsigned type is also used for handling Gauge32 values.

If the MIB-Files are loaded by into the MIB Tree with "snmp_read_mib" or by specifying it in the libsnmp config, '=' may be used as the type parameter for all object ids as the type can then be automatically read from the MIB.

Note that there are two ways to set a variable of the type BITS like e.g. "SYNTAX BITS {telnet(0), ftp(1), http(2), icmp(3), snmp(4), ssh(5), https(6)}":

Using type "b" and a list of bit numbers. This method is not recommended since GET query for the same OID would return e.g. 0xF8.
Using type "x" and a hex number but without(!) the usual "0x" prefix.

See examples section for more details.

value

The new value.

timeout

The number of microseconds until the first timeout.

retries

The number of times to retry if timeouts occur.

Dönen Değerler

Başarı durumunda true, başarısızlık durumunda false döner.

If the SNMP host rejects the data type, an E_WARNING message like "Warning: Error in packet. Reason: (badValue) The value given has the wrong type or length." is shown. If an unknown or invalid OID is specified the warning probably reads "Could not add variable".

Örnekler

Örnek 1 Using snmpset()

<?php
  snmpset("localhost", "public", "IF-MIB::ifAlias.3", "s", "foo");
?>

Örnek 2 Using snmpset() for setting BITS SNMP object id

<?php
  snmpset("localhost", "public", 'FOO-MIB::bar.42', 'b', '0 1 2 3 4');
// or
  snmpset("localhost", "public", 'FOO-MIB::bar.42', 'x', 'F0');
?>

Ayrıca Bakınız

snmpget() - Fetch an SNMP object

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User Contributed Notes 3 notes

down

ch at lathspell dot de ¶

14 years ago

Note that there are two ways to set a variable of the type BITS like e.g.: 
  SYNTAX        BITS {telnet(0), ftp(1), http(2), icmp(3), snmp(4), ssh(5), https(6)}

1. Using type "b" and a list of bit numbers like:
  snmpset('FOO-MIB::bar.42', 'b', '0 1 2 3 4');
with the disadvantage that the success is not easily verifyable as an snmpget() for the same OID would return e.g. 0xF8.

2. Using type "x" and a hex number but without(!) the usual "0x" prefix:
  snmpset('FOO-MIB::bar.42', 'x', 'F0');

down

deivis dot jakstas at gmail dot com ¶

17 years ago

If you setting hex values correct format is:
snmpset($source_ip,$community,"$oid","x","10 10 10 10");

down

slawrance at technologist dot com ¶

25 years ago

The "type" parameter must be one of the following, depending on the type of variable to set on the SNMP host:



i    INTEGER

u    unsigned INTEGER

t    TIMETICKS

a    IPADDRESS

o    OBJID

s    STRING

x    HEX STRING

d    DECIMAL STRING

n    NULLOBJ

b    BITS



If OPAQUE_SPECIAL_TYPES was defined while compiling the SNMP library, the

following are also valid:



U    unsigned int64

I    signed int64

F    float

D    double



As an example, using "i" would set an integer, and "s" would set a string.  If the SNMP host rejects the data type, you might get the following message: "Warning: Error in packet. Reason: (badValue) The value given has the wrong type or length."



If you specify an unknown or invalid OID, you might get a "Could not add variable" message.  When specifying an absolute OID (one that is already resolved) that is completely numeric, prepend it with a period.  For example, an OID that could enable/disable Ethernet ports on an Asante hub might be "1.3.6.1.2.1.22.1.3.1.1.3.6.4.0", but you would need to use ".1.3.6.1.2.1.22.1.3.1.1.3.6.4.0" in the OID parameter so that the SNMP library won't try to resolve an already resolved OID.  Friendly, unresolved OIDs do not need the period prepended, such as "system.SysContact.0"

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