1snmp_pdus(3)               Erlang Module Definition               snmp_pdus(3)
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3
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NAME

6       snmp_pdus - Encode and Decode Functions for SNMP PDUs
7

DESCRIPTION

9       RFC1157,  RFC1905  and/or  RFC2272  should  be studied carefully before
10       using this module, snmp_pdus.
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12       The module snmp_pdus contains functions for encoding  and  decoding  of
13       SNMP  protocol data units (PDUs). In short, this module converts a list
14       of bytes to Erlang record representations and vice  versa.  The  record
15       definitions  can  be  found in the file snmp/include/snmp_types.hrl. If
16       snmpv3 is used, the module that includes snmp_types.hrl must define the
17       constant SNMP_USE_V3 before the header file is included. Example:
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19       -define(SNMP_USE_V3, true).
20       -include_lib("snmp/include/snmp_types.hrl").
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22       Encoding and decoding must be done explicitly when writing your own Net
23       if process.
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EXPORTS

26       dec_message([byte()]) -> Message
27
28              Types:
29
30                 Message = #message
31
32              Decodes a list of bytes into an SNMP Message. Note, if there  is
33              a  v3  message,  the msgSecurityParameters are not decoded. They
34              must be explicitly decoded by a call to a  security  model  spe‐
35              cific  decoding  function,  e.g.  dec_usm_security_parameters/1.
36              Also note, if the  scopedPDU  is  encrypted,  the  OCTET  STRING
37              encoded encryptedPDU will be present in the data field.
38
39       dec_message_only([byte()]) -> Message
40
41              Types:
42
43                 Message = #message
44
45              Decodes  a  list  of  bytes  into  an SNMP Message, but does not
46              decode the data part of the Message. That means, data is still a
47              list of bytes, normally an encoded PDU (v1 and V2) or an encoded
48              and possibly encrypted scopedPDU (v3).
49
50       dec_pdu([byte()]) -> Pdu
51
52              Types:
53
54                 Pdu = #pdu
55
56              Decodes a list of bytes into an SNMP Pdu.
57
58       dec_scoped_pdu([byte()]) -> ScopedPdu
59
60              Types:
61
62                 ScopedPdu = #scoped_pdu
63
64              Decodes a list of bytes into an SNMP ScopedPdu.
65
66       dec_scoped_pdu_data([byte()]) -> ScopedPduData
67
68              Types:
69
70                 ScopedPduData = #scoped_pdu | EncryptedPDU
71                 EncryptedPDU = [byte()]
72
73              Decodes a list of bytes into either a scoped pdu record, or - if
74              the scoped pdu was encrypted - to a list of bytes.
75
76       dec_usm_security_parameters([byte()]) -> UsmSecParams
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78              Types:
79
80                 UsmSecParams = #usmSecurityParameters
81
82              Decodes a list of bytes into an SNMP UsmSecurityParameters
83
84       enc_encrypted_scoped_pdu(EncryptedScopedPdu) -> [byte()]
85
86              Types:
87
88                 EncryptedScopedPdu = [byte()]
89
90              Encodes  an  encrypted  SNMP ScopedPdu into an OCTET STRING that
91              can be used as the data field in a message  record,  that  later
92              can be encoded with a call to enc_message_only/1.
93
94              This   function   should  be  used  whenever  the  ScopedPDU  is
95              encrypted.
96
97       enc_message(Message) -> [byte()]
98
99              Types:
100
101                 Message = #message
102
103              Encodes a message record to a list of bytes.
104
105       enc_message_only(Message) -> [byte()]
106
107              Types:
108
109                 Message = #message
110
111              Message is a record where  the  data  field  is  assumed  to  be
112              encoded  (a  list of bytes). If there is a v1 or v2 message, the
113              data field is an encoded PDU, and if there is a v3 message, data
114              is an encoded and possibly encrypted scopedPDU.
115
116       enc_pdu(Pd) -> [byte()]
117
118              Types:
119
120                 Pdu = #pdu
121
122              Encodes an SNMP Pdu into a list of bytes.
123
124       enc_scoped_pdu(ScopedPdu) -> [byte()]
125
126              Types:
127
128                 ScopedPdu = #scoped_pdu
129
130              Encodes  an  SNMP  ScopedPdu  into a list of bytes, which can be
131              encrypted,  and  after  encryption,  encoded  with  a  call   to
132              enc_encrypted_scoped_pdu/1;  or it can be used as the data field
133              in a message record, which then can  be  encoded  with  enc_mes‐
134              sage_only/1.
135
136       enc_usm_security_parameters(UsmSecParams) -> [byte()]
137
138              Types:
139
140                 UsmSecParams = #usmSecurityParameters
141
142              Encodes SNMP UsmSecurityParameters into a list of bytes.
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144
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146Ericsson AB                       snmp 5.4.3                      snmp_pdus(3)