Message Processing and Dispatch module for the SNMP manager
The module snmpm_mpd
implements the version independent
Message Processing and Dispatch functionality in SNMP for the manager.
It is supposed to be used from a Network Interface process
(Definition of Manager Net if).
Legacy API function process_msg/7
that has got separate
IpAddr
and PortNumber
arguments still works as before
for backwards compatibility reasons.
Functions
Vsns = [Vsn]
Vsn = v1 | v2 | v3
This function can be called from the net_if process at start-up. The options list defines which versions to use.
It also initializes some SNMP counters.
Msg = binary()
Domain = transportDomainUdpIpv4 | transportDomainUdpIpv6
Addr = {inet:ip_address(), inet:port_number()}
State = mpd_state()
NoteStore = pid()
Logger = function()
Vsn = 'version-1' | 'version-2' | 'version-3'
Pdu = #pdu
PduMs = integer()
MsgData = term()
Processes an incoming message. Performs authentication and decryption as necessary. The return values should be passed the manager server.
NoteStore
is the pid()
of the note-store process.
Logger
is the function used for audit trail logging.
In the case when the pdu type is report
, MsgData
is
either ok
or {error, ReqId, Reason}
.
Vsn = 'version-1' | 'version-2' | 'version-3'
NoteStore = pid()
Pdu = #pdu
MsgData = term()
Logger = function()
Packet = binary()
Reason = term()
Generates a possibly encrypted packet to be sent to the network.
NoteStore
is the pid()
of the note-store process.
MsgData
is the message specific data used in the SNMP
message. In SNMPv1 and SNMPv2c, this message data is the community
string. In SNMPv3, it is the context information.
Logger
is the function used for audit trail logging.
Vsn = 'version-1' | 'version-2' | 'version-3'
Pdu = #pdu
MsgData = term()
Logger = function()
Packet = binary()
Reason = term()
Generates a possibly encrypted response packet to be sent to the network.
MsgData
is the message specific data used in the SNMP
message. This value is received from the
process_msg
function.