diff options
Diffstat (limited to 'lib/diameter/doc/src/diameter_dict.xml')
| -rw-r--r-- | lib/diameter/doc/src/diameter_dict.xml | 67 |
1 files changed, 37 insertions, 30 deletions
diff --git a/lib/diameter/doc/src/diameter_dict.xml b/lib/diameter/doc/src/diameter_dict.xml index 166c7a8c9d..a87f59bad5 100644 --- a/lib/diameter/doc/src/diameter_dict.xml +++ b/lib/diameter/doc/src/diameter_dict.xml @@ -48,37 +48,41 @@ to encode and decode its messages and AVP's. The dictionary module is in turn generated from a file that defines these messages and AVP's. The format of such a file is defined in -<seealso marker="#FILE_FORMAT">FILE FORMAT</seealso> below.</p> +<seealso marker="#FILE_FORMAT">FILE FORMAT</seealso> below. +Users add support for their specific applications by creating +dictionary files, compiling them to Erlang modules using +<seealso marker="diameterc">diameterc</seealso> and configuring the +resulting dictionaries modules on a service.</p> <p> -The codec generation also results in an hrl that defines records +The codec generation also results in a hrl file that defines records for the messages and grouped AVP's defined for the application, these -records being what a user of the diameter application sends and -receives. +records being what a user of the diameter application sends and receives. +(Modulo other available formats as discussed in <seealso +marker="diameter_app">diameter_app(3)</seealso>.) These records and the underlying Erlang data types corresponding to Diameter data formats are discussed in <seealso marker="#MESSAGE_RECORDS">MESSAGE RECORDS</seealso> and <seealso -marker="#DATA_TYPES">DATA TYPES</seealso> respectively.</p> - -<!-- TODO: Need some reserved dictionary for agents that shouldn't --> -<!-- know about specific applications. --> - -<p> -The diameter application defines the base application of RFC 3588 in -the file diameter_gen_base_rfc3588.dia, and -this is the only application that diameter itself has any specific -knowledge of. -Other applications are callback modules configured for an application -as far as diameter is concerned.</p> - -<p> -A generated hrl also contains defines for the values of defined for +marker="#DATA_TYPES">DATA TYPES</seealso> respectively. +The generated hrl also contains defines for the possible values of AVPs of type Enumerated.</p> <p> -See <seealso marker="diameterc">diameterc</seealso> for a -utility that transforms dictionary files into codec modules needed -at runtime.</p> +The diameter application includes three dictionary modules +corresponding to applications defined in section 2.4 of RFC 3588: +<c>diameter_gen_base_rfc3588</c> for the Diameter Common Messages +application with application identifier 0, +<c>diameter_gen_accounting</c> for the Diameter Base Accounting +application with application identifier 3 and +<c>diameter_gen_relay</c>the Relay application with application +identifier 0xFFFFFFFF. +The Common Message and Relay applications are the only applications +that diameter itself has any specific knowledge of. +The Common Message application is used for messages that diameter +itself handles: CER/CEA, DWR/DWA and DPR/DPA. +The Relay application is given special treatment with regard to +encode/decode since the messages and AVP's it handles are not specifically +defined.</p> <marker id="FILE_FORMAT"/> </description> @@ -89,7 +93,7 @@ at runtime.</p> <title>FILE FORMAT</title> <p> -A specification file consists of distinct sections. +A dictionary file consists of distinct sections. Each section starts with a line consisting of a tag followed by zero or more arguments. Each section ends at the the start of the next section or end of file. @@ -223,7 +227,7 @@ The section content is empty.</p> <p> Can occur 0 or more times (with different values of Mod) but all dictionaries should typically inherit RFC3588 AVPs from -diameter_gen_base_rfc3588.</p> +<c>diameter_gen_base_rfc3588</c>.</p> <p> Example:</p> @@ -263,7 +267,8 @@ Requested-Information 353 Enumerated V <p> Note that the P flag has been deprecated by the Diameter Maintenance -and Extensions Working Group of the IETF.</p> +and Extensions Working Group of the IETF: diameter will set the P flag +to 0 as mandated by the current draft standard.</p> </item> @@ -446,7 +451,7 @@ as values of the types defined here. Values are passed to <seealso marker="diameter#call">diameter:call/4</seealso> in a request record when sending a request, returned in a resulting -answer record and passed to a diameter_app(3) <seealso +answer record and passed to a <seealso marker="diameter_app#handle_request">handle_request</seealso> callback upon reception of an incoming request.</p> @@ -476,8 +481,8 @@ Grouped() = record() <p> On encode, an OctetString() can be specified as an iolist(), excessively large floats (in absolute value) are equivalent to -infinity or '-infinity' and excessively large integers result in -encode failure. +<c>infinity</c> or <c>'-infinity'</c> and excessively large integers +result in encode failure. The records for grouped AVPs are as discussed in the previous section.</p> @@ -583,7 +588,7 @@ QoSFilterRule() = OctetString() </code> <p> -Values of these types are not parsed by diameter.</p> +Values of these types are not currently parsed by diameter.</p> </section> @@ -594,7 +599,9 @@ Values of these types are not parsed by diameter.</p> <title>SEE ALSO</title> <p> -<seealso marker="diameterc">diameterc(1)</seealso></p> +<seealso marker="diameterc">diameterc(1)</seealso>, +<seealso marker="diameter">diameter(3)</seealso>, +<seealso marker="diameter_app">diameter_app(3)</seealso></p> </section> |