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');
snmpset
(PHP 4, PHP 5)
snmpset — Set the value of an SNMP object
說明
bool snmpset
( string
$host
, string $community
, string $object_id
, string $type
, mixed $value
[, int $timeout = 1000000
[, int $retries = 5
]] )
snmpset() is used to set the value of an SNMP object
specified by the object_id.
參數
-
host -
The hostname of the SNMP agent (server).
-
community -
The write community.
-
object_id -
The SNMP object id.
-
type -
MIB 定義了各個對象 id 的類型。必須是下面列出的單個字元之一。
類型 = MIB類型 i INTEGER u INTEGER s STRING x HEX STRING d DECIMAL STRING n NULLOBJ o OBJID t TIMETICKS a IPADDRESS b BITS 如果在編譯 SNMP 函式庫時定義了
OPAQUE_SPECIAL_TYPES，則下列值是合法的：types U unsigned int64 I signed int64 F float D double 這些值大都會使用與 ASN.1 相符的類型。's'，'x'，'d' 以及 'b' 都是指定一個八進位字串值的方式。並且 'u' 無號類型也可用於處理 Gauge32 值。
如果 MIB 檔案是用 "snmp_read_mib" 或者通過在 libsnmp config 中指定而載入 MIB 數時， '=' 可以被用作為所有物件的
type參數，因為 type 可以被自動從 MIB 中讀取。注意有兩種方式可以設定 BITS 類型的變數，例如 "SYNTAX BITS {telnet(0), ftp(1), http(2), icmp(3), snmp(4), ssh(5), https(6)}":
- 使用 "b" 類型以及一個位數的列表。不建議使用此方法，因為 GET 查詢時間一個 OID 將會回傳例如 0xF8。
- 使用 "x" 類型以及一個十六進位數但是不需要通常的 "0x" 前綴字。
更多細節見範例部分。
-
value -
The new value.
-
timeout -
The number of microseconds until the first timeout.
-
retries -
The number of times to retry if timeouts occur.
回傳值
如果成功則回傳 TRUE，失敗則回傳 FALSE。
If the SNMP host rejects the data type, an E_WARNING message like "Warning: Error in packet. Reason: (badValue) The value given has the wrong type or length." is shown. If an unknown or invalid OID is specified the warning probably reads "Could not add variable".
範例
Example #1 Using snmpset()
<?php
snmpset("localhost", "public", "IF-MIB::ifAlias.3", "s", "foo");
?>
Example #2 Using snmpset() for setting BITS SNMP object id
<?php
snmpset("localhost", "public", 'FOO-MIB::bar.42', 'b', '0 1 2 3 4');
// or
snmpset("localhost", "public", 'FOO-MIB::bar.42', 'x', 'F0');
?>
add a note
User Contributed Notes 4 notes
ch at lathspell dot de ¶
14 years ago
deivis dot jakstas at gmail dot com ¶
17 years ago
If you setting hex values correct format is:
snmpset($source_ip,$community,"$oid","x","10 10 10 10");
slawrance at technologist dot com ¶
24 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"
tridman ¶
17 years ago
If you have importet the MIB-Files into the MIB Tree with "snmp_read_mib" you may use '=' as the "type" parameter.
In this case the type will also be taken from the loaded mib file. (Octest strings will be interpreted like strings though)
Comes in handy for a more dynamic use of snmpset.
