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There are two routines which handle encoding and decoding operations on SMUX PDUs: encode_SMUX_PDU and decode_SMUX_PDU.
encode_SMUX_PDU creates an
ASN.1
encoded
SMUX
PDU
from the
SMUX
PDU
structure specified by pdu_ptr.
ASN.1
encoding is required for the transfer of an
SMUX
PDU
from an agent to a peer and vice versa.
encode_SMUX_PDU traces down the structure of VarBinds
that have been added to the
SMUX
PDU,
and builds the
ASN.1
encoding of the
SMUX
PDU
in the packlet pointer of the
SMUX
PDU
data structure specified by pdu_ptr.
When this
ASN.1
encoding is complete,
SMUX
PDU
processing is complete,
and the structure is ready to be transferred.
If successful,
encode_SMUX_PDU returns 0, if unsuccessful, it returns -1.
decode_SMUX_PDU takes an SMUX PDU from the packet received and parses the information into the library's internal PDU format, including all VarBind instances. If this routine fails, it returns NULL.