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author | Anders Svensson <[email protected]> | 2012-08-30 13:14:16 +0200 |
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committer | Anders Svensson <[email protected]> | 2012-08-30 13:14:16 +0200 |
commit | 6de88765e9e3275e2b52dd25a1e6bc8e4df8486b (patch) | |
tree | 68cf39263919f62e5c99d1ba5444b169c3332238 /lib/diameter/doc/src/diameter.xml | |
parent | e82402b8f6cd0e8f0a1d9ae60555e333f6e0fb48 (diff) | |
parent | 910055a9257ae0bd5c9203fccc2eb13d07c6dc21 (diff) | |
download | otp-6de88765e9e3275e2b52dd25a1e6bc8e4df8486b.tar.gz otp-6de88765e9e3275e2b52dd25a1e6bc8e4df8486b.tar.bz2 otp-6de88765e9e3275e2b52dd25a1e6bc8e4df8486b.zip |
Merge branch 'anders/diameter/documentation/OTP-10216' into maint
* anders/diameter/documentation/OTP-10216:
Fix broken references
Correct doc on AVP P flag and add warning about its deprecation
Fix/tweak references to other applications
Minor formatting fixes
Add warning about 'host' filter
Update diameterc doc
Minor updates/corrections to Users Guide
Add SCTP warning, more references
Assorted doc improvements
Document service info
Document watchdog events
Terminology and other clarifications, more references
Clarify documentation on application state
Diffstat (limited to 'lib/diameter/doc/src/diameter.xml')
-rw-r--r-- | lib/diameter/doc/src/diameter.xml | 891 |
1 files changed, 575 insertions, 316 deletions
diff --git a/lib/diameter/doc/src/diameter.xml b/lib/diameter/doc/src/diameter.xml index 10139b90c7..b8652a7482 100644 --- a/lib/diameter/doc/src/diameter.xml +++ b/lib/diameter/doc/src/diameter.xml @@ -5,7 +5,7 @@ <header> <copyright> -<year>2011</year> +<year>2011</year><year>2012</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -43,13 +43,13 @@ under the License. <description> <p> -This module provides the interface with which a user -creates a service that sends and receives messages using the +This module provides the interface with which a user can +implement a Diameter node that sends and receives messages using the Diameter protocol as defined in RFC 3588.</p> <p> Basic usage consists of creating a representation of a -locally implemented Diameter peer and its capabilities with <seealso +locally implemented Diameter node and its capabilities with <seealso marker="#start_service">start_service/2</seealso>, adding transport capability using <seealso marker="#add_transport">add_transport/2</seealso> and sending Diameter @@ -61,17 +61,15 @@ marker="diameter_app">diameter_app(3)</seealso> callback modules as specified in the service configuration.</p> <p> -Beware the difference between <em>diameter application</em> and -<em>Diameter application</em>. +Beware the difference between <em>diameter</em> (not capitalised) and +<em>Diameter</em> (capitalised). The former refers to the Erlang application named diameter whose main -api is defined here, the latter to an application of the Diameter -protocol in the sense of RFC 3588. -More generally, capitalized Diameter refers to the RFC -and diameter to this implementation.</p> +api is defined here, the latter to Diameter protocol in the sense of +RFC 3588.</p> <p> -The diameter application must be started before calling functions in -this module.</p> +The diameter application must be started before calling most functions +in this module.</p> </description> @@ -84,13 +82,15 @@ this module.</p> <tag><c>Address()</c></tag> <tag><c>DiameterIdentity()</c></tag> +<tag><c>Grouped()</c></tag> +<tag><c>OctetString()</c></tag> <tag><c>Time()</c></tag> <tag><c>Unsigned32()</c></tag> <tag><c>UTF8String()</c></tag> <item> <p> Types corresponding to RFC 3588 AVP Data Formats. -Defined in <seealso marker="diameter_dict">diameter_dict(4)</seealso>.</p> +Defined in <seealso marker="diameter_dict#DATA_TYPES">diameter_dict(4)</seealso>.</p> <marker id="application_alias"/> </item> @@ -99,10 +99,9 @@ Defined in <seealso marker="diameter_dict">diameter_dict(4)</seealso>.</p> <item> <p> A name identifying a Diameter application in -service configuration passed to <seealso -marker="#start_service">start_service/2</seealso> and passed to -<seealso marker="#call">call/4</seealso> when sending requests -belonging to the application.</p> +service configuration. +Passed to <seealso marker="#call">call/4</seealso> when sending requests +defined by the application.</p> <marker id="application_module"/> </item> @@ -120,19 +119,14 @@ ExtraArgs = list() A module implementing the callback interface defined in <seealso marker="diameter_app">diameter_app(3)</seealso>, along with any extra arguments to be appended to those documented for the interface. -Any extra arguments are appended to the documented list of arguments for -each function. -Note that additional arguments specific to an outgoing request be +Note that extra arguments specific to an outgoing request can be specified to <seealso marker="#call">call/4</seealso>, in which case -the call-specific arguments are appended to any specified with the -callback module.</p> +those are are appended to any module-specific extra arguments.</p> <p> Specifying a <c>#diameter_callback{}</c> record allows individual functions to be configured in place of the usual <seealso -marker="diameter_app">diameter_app(3)</seealso> callbacks, with -default implementations provided by module <c>diameter_callback</c> -unless otherwise specified. +marker="diameter_app">diameter_app(3)</seealso> callbacks. See that module for details.</p> <marker id="application_opt"/> @@ -142,18 +136,18 @@ See that module for details.</p> <item> <p> -Options defining a Diameter application as configured in an -<c>application</c> option passed to -<seealso marker="#start_service">start_service/2</seealso>.</p> +Options defining a Diameter application. +Has one the following types.</p> <taglist> -<tag><c>{alias, application_alias()}</c></tag> +<tag><c>{alias, <seealso marker="#application_alias">application_alias()</seealso>}</c></tag> <item> <p> An unique identifier for the application in the scope of the service. -Optional, defaults to the value of the <c>dictionary</c> option.</p> +Defaults to the value of the <c>dictionary</c> option if +unspecified.</p> </item> <tag><c>{dictionary, atom()}</c></tag> @@ -166,23 +160,23 @@ documented in <seealso marker="diameter_dict">diameter_dict(4)</seealso>.</p> </item> -<tag><c>{module, application_module()}</c></tag> +<tag><c>{module, <seealso marker="#application_module">application_module()</seealso>}</c></tag> <item> <p> -A callback module with which messages of the Diameter application are +The callback module with which messages of the Diameter application are handled. See <seealso marker="diameter_app">diameter_app(3)</seealso> for -information on the required interface and semantics.</p> +the required interface and semantics.</p> </item> <tag><c>{state, term()}</c></tag> <item> <p> The initial callback state. -Defaults to the value of the <c>alias</c> option if unspecified. -The prevailing state is passed to certain +The prevailing state is passed to some <seealso marker="diameter_app">diameter_app(3)</seealso> -callbacks, which can then return a new state.</p> +callbacks, which can then return a new state. +Defaults to the value of the <c>alias</c> option if unspecified.</p> </item> <tag><c>{call_mutates_state, true|false}</c></tag> @@ -190,19 +184,18 @@ callbacks, which can then return a new state.</p> <p> Specifies whether or not the <seealso marker="diameter_app#pick_peer">pick_peer/4</seealso> -application callback (following from a call to -<seealso marker="#call">call/4</seealso>) -can modifiy state, +application callback can modify the application state, Defaults to <c>false</c> if unspecified.</p> +<note> <p> -Note that <seealso -marker="diameter_app#pick_peer">pick_peer</seealso> callbacks are -serialized when these are allowed to modify state, which is a +<seealso marker="diameter_app#pick_peer">pick_peer</seealso> callbacks +are serialized when these are allowed to modify state, which is a potential performance bottleneck. A simple Diameter client may suffer no ill effects from using mutable -state but a server or agent that responds to incoming request but -sending its own requests should probably avoid it.</p> +state but a server or agent that responds to incoming request should +probably avoid it.</p> +</note> </item> <tag><c>{answer_errors, callback|report|discard}</c></tag> @@ -213,9 +206,9 @@ decode errors are handled. If <c>callback</c> then errors result in a <seealso marker="diameter_app#handle_answer">handle_answer/4</seealso> callback in the same fashion as for <seealso -marker="diameter_app#handle_request">handle_request/3</seealso>, in the -<c>errors</c> field of the <c>diameter_packet</c> record passed into -the callback. +marker="diameter_app#handle_request">handle_request/3</seealso>, with +errors communicated in the <c>errors</c> field of the +<c>#diameter_packet{}</c> record passed to the callback. If <c>report</c> then an answer containing errors is discarded without a callback and a warning report is written to the log. If <c>discard</c> then an answer containing errors is silently @@ -239,7 +232,8 @@ Defaults to <c>report</c> if unspecified.</p> <p> Options available to <seealso marker="#call">call/4</seealso> when -sending an outgoing Diameter request.</p> +sending an outgoing Diameter request. +Has one of the following types.</p> <taglist> @@ -248,12 +242,12 @@ sending an outgoing Diameter request.</p> <p> Extra arguments to append to callbacks to the callback module in question. -These are appended to any extra arguments configured with the callback +These are appended to any extra arguments configured on the callback itself. Multiple options append to the argument list.</p> </item> -<tag><c>{filter, peer_filter()}</c></tag> +<tag><c>{filter, <seealso marker="#peer_filter">peer_filter()</seealso>}</c></tag> <item> <p> A filter to apply to the list of available peers before passing them to @@ -264,7 +258,7 @@ corresponding list of filters. Defaults to <c>none</c>.</p> </item> -<tag><c>{timeout, Unsigned32()}</c></tag> +<tag><c>{timeout, <seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>}</c></tag> <item> <p> The number of milliseconds after which the request should @@ -298,121 +292,55 @@ to fail.</p> <item> <p> -AVP values used in outgoing CER/CEA messages during capabilities exchange. -Can be configured both on a service and a transport, the latter taking -precedence over the former.</p> +AVP values sent in outgoing CER or CEA messages during capabilities +exchange. +Can be configured both on a service and a transport, values specified +on the latter taking precedence over any specified on the former. +Has one of the following types.</p> <taglist> -<tag><c>{'Origin-Host', DiameterIdentity()}</c></tag> -<item> -<p> -Value of the Origin-Host AVP in outgoing messages.</p> -</item> - -<tag><c>{'Origin-Realm', DiameterIdentity()}</c></tag> -<item> -<p> -Value of the Origin-Realm AVP in outgoing messages.</p> -</item> - -<tag><c>{'Host-IP-Address', [Address()]}</c></tag> -<item> -<p> -Values of Host-IP-Address AVPs. -Optional.</p> - -<p> -The list of addresses is available to the start function of a -transport module, which either uses them as is or returns a new list -(typically as configured as <c>transport_config()</c> on the -transport module in question) in order for the correct list of -addresses to be sent in capabilities exchange messages.</p> -</item> - -<tag><c>{'Vendor-Id', Unsigned32()}</c></tag> +<tag><c>{'Origin-Host', <seealso marker="diameter_dict#DATA_TYPES">DiameterIdentity()</seealso>}</c></tag> +<tag><c>{'Origin-Realm', <seealso marker="diameter_dict#DATA_TYPES">DiameterIdentity()</seealso>}</c></tag> +<tag><c>{'Host-IP-Address', [<seealso marker="diameter_dict#DATA_TYPES">Address()</seealso>]}</c></tag> <item> <p> -Value of the Vendor-Id AVP sent in an outgoing capabilities -exchange message.</p> +An address list is available to the start function of a +<seealso marker="diameter_transport">transport module</seealso>, which +can return a new list for use in the subsequent CER or CEA. +Host-IP-Address need not be specified if the transport start function +returns an address list.</p> </item> -<tag><c>{'Product-Name', UTF8String()}</c></tag> +<tag><c>{'Vendor-Id', <seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>}</c></tag> +<tag><c>{'Product-Name', <seealso marker="diameter_dict#DATA_TYPES">UTF8String()</seealso>}</c></tag> +<tag><c>{'Origin-State-Id', <seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>}</c></tag> <item> <p> -Value of the Product-Name AVP sent in an outgoing capabilities -exchange message.</p> -</item> - -<tag><c>{'Origin-State-Id', Unsigned32()}</c></tag> -<item> -<p> -Value of Origin-State-Id to be included in outgoing messages sent by -diameter itself. -In particular, the AVP will be included in CER/CEA and DWR/DWA messages. -Optional.</p> - -<p> +Origin-State-Id is optional but will be included in outgoing messages +sent by diameter itself: CER/CEA, DWR/DWA and DPR/DPA. Setting a value of <c>0</c> (zero) is equivalent to not setting a value as documented in RFC 3588. The function <seealso marker="#origin_state_id">origin_state_id/0</seealso> -can be used as to retrieve a value that is set when the diameter +can be used as to retrieve a value that is computed when the diameter application is started.</p> </item> -<tag><c>{'Supported-Vendor-Id', [Unsigned32()]}</c></tag> +<tag><c>{'Supported-Vendor-Id', [<seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>]}</c></tag> +<tag><c>{'Auth-Application-Id', [<seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>]}</c></tag> +<tag><c>{'Inband-Security-Id', [<seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>]}</c></tag> <item> <p> -Values of Supported-Vendor-Id AVPs sent in an outgoing -capabilities exchange message. -Optional, defaults to the empty list.</p> -</item> - -<tag><c>{'Auth-Application-Id', [Unsigned32()]}</c></tag> -<item> -<p> -Values of Auth-Application-Id AVPs sent in an outgoing -capabilities exchange message. -Optional, defaults to the empty list.</p> -</item> - -<tag><c>{'Inband-Security-Id', [Unsigned32()]}</c></tag> -<item> -<p> -Values of Inband-Security-Id AVPs sent in an outgoing -capabilities exchange message. -Optional, defaults to the empty list, which is equivalent to a -list containing only 0 (= NO_INBAND_SECURITY).</p> - -<p> +Inband-Security-Id defaults to the empty list, which is equivalent to a +list containing only 0 (= NO_INBAND_SECURITY). If 1 (= TLS) is specified then TLS is selected if the CER/CEA received from the peer offers it.</p> </item> -<tag><c>{'Acct-Application-Id', [Unsigned32()]}</c></tag> -<item> -<p> -Values of Acct-Application-Id AVPs sent in an outgoing -capabilities exchange message. -Optional, defaults to the empty list.</p> -</item> - -<tag><c>{'Vendor-Specific-Application-Id', [Grouped()]}</c></tag> -<item> -<p> -Values of Vendor-Specific-Application-Id AVPs sent in -an outgoing capabilities exchange message. -Optional, defaults to the empty list.</p> -</item> - -<tag><c>{'Firmware-Revision', Unsigned32()}</c></tag> -<item> -<p> -Value of the Firmware-Revision AVP sent in an outgoing capabilities -exchange message. -Optional.</p> -</item> +<tag><c>{'Acct-Application-Id', [<seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>]}</c></tag> +<tag><c>{'Vendor-Specific-Application-Id', [<seealso marker="diameter_dict#DATA_TYPES">Grouped()</seealso>]}</c></tag> +<tag><c>{'Firmware-Revision', <seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>}</c></tag> </taglist> @@ -441,14 +369,17 @@ eval(F) -> </code> <p> -Applying an evaluable() <c>E</c> to an argument list <c>A</c> +Applying an <c><seealso marker="#evaluable">evaluable()</seealso></c> +<c>E</c> to an argument list <c>A</c> is meant in the sense of <c>eval([E|A])</c>.</p> +<warning> <p> -Beware of using local funs (that is, fun expressions not of the -form <c>fun Module:Name/Arity</c>) in situations in which the fun is -not short-lived and code is to be upgraded at runtime since any -processes retaining such a fun will have a reference to old code.</p> +Beware of using fun expressions of the form <c>fun Name/Arity</c> (not +fun Mod:Name/Arity) in situations in which the fun is not short-lived +and code is to be upgraded at runtime since any processes retaining +such a fun will have a reference to old code.</p> +</warning> <marker id="peer_filter"/> </item> @@ -490,63 +421,76 @@ or any peer if the request does not contain a <c>Destination-Realm</c> AVP.</p> </item> -<tag><c>{host, any|DiameterIdentity()}</c></tag> +<tag><c>{host, any|<seealso marker="diameter_dict#DATA_TYPES">DiameterIdentity()</seealso>}</c></tag> <item> <p> Matches only those peers whose <c>Origin-Host</c> has the specified value, or all peers if the atom <c>any</c>.</p> </item> -<tag><c>{realm, any|DiameterIdentity()</c></tag> +<tag><c>{realm, any|<seealso marker="diameter_dict#DATA_TYPES">DiameterIdentity()</seealso></c></tag> <item> <p> Matches only those peers whose <c>Origin-Realm</c> has the -value, or all peers if the atom <c>any</c>.</p> +specified value, or all peers if the atom <c>any</c>.</p> </item> -<tag><c>{eval, evaluable()}</c></tag> +<tag><c>{eval, <seealso marker="#evaluable">evaluable()</seealso>}</c></tag> <item> <p> -Matches only those peers for which the specified evaluable() returns +Matches only those peers for which the specified <c><seealso +marker="#evaluable">evaluable()</seealso></c> returns <c>true</c> on the connection's <c>diameter_caps</c> record. Any other return value or exception is equivalent to <c>false</c>.</p> </item> -<tag><c>{neg, peer_filter()}</c></tag> +<tag><c>{neg, <seealso marker="#peer_filter">peer_filter()</seealso>}</c></tag> <item> <p> Matches only those peers not matched by the specified filter.</p> </item> -<tag><c>{all, [peer_filter()]}</c></tag> +<tag><c>{all, [<seealso marker="#peer_filter">peer_filter()</seealso>]}</c></tag> <item> <p> -Matches only those peers matched by each filter of the specified list.</p> +Matches only those peers matched by each filter in the specified list.</p> </item> -<tag><c>{any, [peer_filter()]}</c></tag> +<tag><c>{any, [<seealso marker="#peer_filter">peer_filter()</seealso>]}</c></tag> <item> <p> -Matches only those peers matched by at least one filter of the +Matches only those peers matched by at least one filter in the specified list.</p> </item> </taglist> <p> -Note that the <c>host</c> and <c>realm</c> filters examine the +An invalid filter is equivalent to <c>{any,[]}</c>, a filter +that matches no peer.</p> + +<note> +<p> +The <c>host</c> and <c>realm</c> filters examine the outgoing request as passed to <seealso marker="#call">call/4</seealso>, -assuming that this is a record- or list-valued message() as documented -in <seealso marker="diameter_app">diameter_app(3)</seealso>, and that -the message contains at most one of each AVP. -If this is not the case then the <c>{host|realm, DiameterIdentity()}</c> +assuming that this is a record- or list-valued <c><seealso +marker="diameter_app#message">diameter_app:message()</seealso></c>, +and that the message contains at most one of each AVP. +If this is not the case then the <c>{host|realm, <seealso +marker="diameter_dict#DATA_TYPES">DiameterIdentity()</seealso>}</c> filters must be used to achieve the desired result. -Note also that an empty host/realm (which should not be typical) -is equivalent to an unspecified one for the purposes of filtering.</p> +An empty <c><seealso +marker="diameter_dict#DATA_TYPES">DiameterIdentity()</seealso></c> +(which should not be typical) +matches all hosts/realms for the purposes of filtering.</p> +</note> +<warning> <p> -An invalid filter is equivalent to <c>{any, []}</c>, a filter -that matches no peer.</p> +A <c>host</c> filter is not typically desirable when setting +Destination-Host since it will remove peer agents from the +candidates list.</p> +</warning> <marker id="service_event"/> </item> @@ -554,12 +498,12 @@ that matches no peer.</p> <tag><c>service_event() = #diameter_event{}</c></tag> <item> <p> -Event message sent to processes that have subscribed using <seealso -marker="#subscribe">subscribe/1</seealso>.</p> +An event message sent to processes that have subscribed to these using +<seealso marker="#subscribe">subscribe/1</seealso>.</p> <p> -The <c>info</c> field of the event record can be one of the -following.</p> +The <c>info</c> field of the event record can have one of the +following types.</p> <taglist> @@ -568,27 +512,27 @@ following.</p> <tag><c>{down, Ref, Peer, Config}</c></tag> <item> <code> -Ref = transport_ref() -Peer = diameter_app:peer() -Config = {connect|listen, [transport_opt()]} +Ref = <seealso marker="#transport_ref">transport_ref()</seealso> +Peer = <seealso marker="diameter_app#peer">diameter_app:peer()</seealso> +Config = {connect|listen, [<seealso marker="#transport_opt">transport_opt()</seealso>]} Pkt = #diameter_packet{} </code> <p> The RFC 3539 watchdog state machine has -transitioned into (<c>up</c>) or out of (<c>down</c>) the open +transitioned into (<c>up</c>) or out of (<c>down</c>) the OKAY state. -If a <c>diameter_packet</c> record is present in an <c>up</c> tuple -then there has been an exchange of capabilities exchange messages and -the record contains the received CER or CEA, otherwise the -connection has reestablished without the loss or transport +If a <c>#diameter_packet{}</c> record is present in an <c>up</c> event +then there has been a capabilties exchange on a newly established +transport connection and the record contains the received CER or CEA. +Otherwise a connection has reestablished without the loss or connectivity.</p> <p> -Note that a single up/down event for a given peer corresponds to -as many <seealso marker="diameter_app#peer_up">peer_up/peer_down</seealso> -callbacks as there are Diameter applications shared by the peer, -as determined during capablilities exchange. +Note that a single <c>up</c>/<c>down</c> event for a given peer +corresponds to one <seealso marker="diameter_app#peer_up">peer_up/peer_down</seealso> +callback for each of the Diameter applications negotiated during +capablilities exchange. That is, the event communicates connectivity with the peer as a whole while the callbacks communicate connectivity with respect to individual Diameter applications.</p> @@ -597,26 +541,28 @@ respect to individual Diameter applications.</p> <tag><c>{reconnect, Ref, Opts}</c></tag> <item> <code> -Ref = transport_ref() -Opts = [transport_opt()] +Ref = <seealso marker="#transport_ref">transport_ref()</seealso> +Opts = [<seealso marker="#transport_opt">transport_opt()</seealso>] </code> <p> A connecting transport is attempting to establish/reestablish a -transport connection with a peer following <c>reconnect_timer</c> or -<c>watchdog_timer</c> expiry.</p> +transport connection with a peer following <seealso +marker="#reconnect_timer">reconnect_timer</seealso> or +<seealso marker="#watchdog_timer">watchdog_timer</seealso> +expiry.</p> </item> <tag><c>{closed, Ref, Reason, Config}</c></tag> <item> <code> -Ref = transport_ref() -Config = {connect|listen, [transport_opt()]} +Ref = <seealso marker="#transport_ref">transport_ref()</seealso> +Config = {connect|listen, [<seealso marker="#transport_opt">transport_opt()</seealso>]} </code> <p> -Capabilities exchange has failed. <c>Reason</c> can be one of -the following.</p> +Capabilities exchange has failed. +<c>Reason</c> can have one of the following types.</p> <taglist> @@ -627,17 +573,17 @@ Result = ResultCode | {capabilities_cb, CB, ResultCode|discard} Caps = #diameter_caps{} Pkt = #diameter_packet{} ResultCode = integer() -CB = evaluable() +CB = <seealso marker="#evaluable">evaluable()</seealso> </code> <p> An incoming CER has been answered with the indicated result code or discarded. -The capabilities record contains pairs of values for the the local -node and remote peer. -The packet record contains the CER in question. +<c>Caps</c> contains pairs of values for the the local node and remote +peer. +<c>Pkt</c> contains the CER in question. In the case of rejection by a capabilities callback, the tuple -indicates the rejecting callback.</p> +contains the rejecting callback.</p> </item> <tag><c>{'CER', Caps, {ResultCode, Pkt}}</c></tag> @@ -651,9 +597,8 @@ Pkt = #diameter_packet{} <p> An incoming CER contained errors and has been answered with the indicated result code. -The capabilities record contains only values for the the local -node. -The packet record contains the CER in question.</p> +<c>Caps</c> contains only values for the the local node. +<c>Pkt</c> contains the CER in question.</p> </item> <tag><c>{'CEA', Result, Caps, Pkt}</c></tag> @@ -669,11 +614,11 @@ ResultCode = integer() An incoming CEA has been rejected for the indicated reason. An integer-valued <c>Result</c> indicates the result code sent by the peer. -The capabilities record contains pairs of values for the the local -node and remote peer. -The packet record contains the CEA in question. +<c>Caps</c> contains pairs of values for the the local node and remote +peer. +<c>Pkt</c> contains the CEA in question. In the case of rejection by a capabilities callback, the tuple -indicates the rejecting callback.</p> +contains the rejecting callback.</p> </item> <tag><c>{'CEA', Caps, Pkt}</c></tag> @@ -684,9 +629,9 @@ Pkt = #diameter_packet{} </code> <p> -An incoming CER contained errors and has been rejected. -The capabilities record contains only values for the the local node. -The packet record contains the CEA in question.</p> +An incoming CEA contained errors and has been rejected. +<c>Caps</c> contains only values for the the local node. +<c>Pkt</c> contains the CEA in question.</p> </item> </taglist> @@ -695,8 +640,8 @@ The packet record contains the CEA in question.</p> <tag><c>{watchdog, Ref, PeerRef, {From, To}, Config}</c></tag> <item> <code> -Ref = transport_ref() -PeerRef = diameter_app:peer_ref() +Ref = <seealso marker="#transport_ref">transport_ref()</seealso> +PeerRef = <seealso marker="diameter_app#peer_ref">diameter_app:peer_ref()</seealso> From, To = initial | okay | suspect | down | reopen Config = {connect|listen, [transport_opt()]} </code> @@ -721,8 +666,8 @@ The name of a service as passed to <seealso marker="#start_service">start_service/2</seealso> and with which the service is identified. There can be at most one service with a given name on a given node. -Note that <c>erlang:make_ref/0</c> can be used to generate a service name -that is somewhat unique.</p> +Note that <seealso marker="erts:erlang#make_ref-0">erlang:make_ref/0</seealso> +can be used to generate a service name that is somewhat unique.</p> <marker id="service_opt"/> </item> @@ -730,29 +675,28 @@ that is somewhat unique.</p> <tag><c>service_opt()</c></tag> <item> <p> -Options accepted by <seealso +An option passed to <seealso marker="#start_service">start_service/2</seealso>. -Can be any <c>capability()</c> tuple as +Can be any <c><seealso marker="#capability">capability()</seealso></c> as well as the following.</p> <taglist> -<tag><c>{application, [application_opt()]}</c></tag> +<tag><c>{application, [<seealso marker="#application_opt">application_opt()</seealso>]}</c></tag> <item> <p> Defines a Diameter application supported by the service.</p> <p> -A service must define one application for each Diameter application it -intends to support. -For an outgoing Diameter request, the application is specified by -passing the desired application's <c>application_alias()</c> to -<seealso marker="#call">call/4</seealso>, while for an +A service must configure one <c>application</c> for each Diameter +application it intends to support. +For an outgoing Diameter request, the relevant <c><seealso +marker="#application_alias">application_alias()</seealso></c> is +passed to <seealso marker="#call">call/4</seealso>, while for an incoming request the application identifier in the message -header determines the application (and callback module), the -application identifier being specified in the <seealso -marker="diameter_dict">dictionary</seealso> file defining the -application.</p> +header determines the application, the identifier being specified in +the application's <seealso marker="diameter_dict">dictionary</seealso> +file.</p> </item> </taglist> @@ -763,8 +707,9 @@ application.</p> <tag><c>transport_opt()</c></tag> <item> <p> -Options accepted by <seealso -marker="#add_transport">add_transport/2</seealso>.</p> +An option passed to <seealso +marker="#add_transport">add_transport/2</seealso>. +Has one of the following types.</p> <taglist> <tag><c>{transport_module, atom()}</c></tag> @@ -775,10 +720,6 @@ marker="diameter_transport">diameter_transport(3)</seealso>. Defaults to <c>diameter_tcp</c> if unspecified.</p> <p> -The interface required of a transport module is documented in <seealso -marker="diameter_transport">diameter_transport(3)</seealso>.</p> - -<p> Multiple <c>transport_module</c> and <c>transport_config</c> options are allowed. The order of these is significant in this case (and only in this case), @@ -787,11 +728,11 @@ a <c>transport_module</c> being paired with the first default value for trailing modules. Transport starts will be attempted with each of the modules in order until one establishes a connection within the -corresponding timeout (see <c>transport_config</c> below) or all fail.</p> +corresponding timeout (see below) or all fail.</p> </item> <tag><c>{transport_config, term()}</c></tag> -<tag><c>{transport_config, term(), Unsigned32()}</c></tag> +<tag><c>{transport_config, term(), <seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso>}</c></tag> <item> <p> A term passed as the third argument to the <seealso @@ -818,40 +759,38 @@ request a connection with one peer over SCTP or another To listen on both SCTP and TCP, define one transport for each.</p> </item> -<tag><c>{applications, [application_alias()]}</c></tag> +<tag><c>{applications, [<seealso marker="#application_alias">application_alias()</seealso>]}</c></tag> <item> <p> -The list of Diameter applications to which usage of the transport -should be restricted. -Defaults to all applications configured on the service -in question.</p> +The list of Diameter applications to which the transport should be +restricted. +Defaults to all applications configured on the service in question. +Applications not configured on the service in question are ignored.</p> </item> -<tag><c>{capabilities, [capability()]}</c></tag> +<tag><c>{capabilities, [<seealso marker="#capability">capability()</seealso>]}</c></tag> <item> <p> AVP's used to construct outgoing CER/CEA messages. -Any AVP specified takes precedence over a corresponding value specified -for the service in question.</p> +Values take precedence over any specified on the service in +question.</p> <p> Specifying a capability as a transport option -may be particularly appropriate for Inband-Security-Id in case +may be particularly appropriate for Inband-Security-Id, in case TLS is desired over TCP as implemented by -<seealso marker="diameter_tcp">diameter_tcp(3)</seealso> but -not over SCTP as implemented by -<seealso marker="diameter_sctp">diameter_sctp(3)</seealso>.</p> +<seealso marker="diameter_tcp">diameter_tcp(3)</seealso>.</p> </item> -<tag><c>{capabilities_cb, evaluable()}</c></tag> +<tag><c>{capabilities_cb, <seealso marker="#evaluable">evaluable()</seealso>}</c></tag> <item> <p> A callback invoked upon reception of CER/CEA during capabilities exchange in order to ask whether or not the connection should be accepted. -Applied to the transport reference (as returned by <seealso -marker="#add_transport">add_transport/2</seealso>) and -<c>diameter_caps</c> record of the connection. +Applied to the relevant <c><seealso +marker="#transport_ref">transport_ref()</seealso></c> and the +<c>#diameter_caps{}</c> record of the connection. Returning <c>ok</c> accepts the connection. Returning <c>integer()</c> causes an incoming CER to be answered with the specified Result-Code. @@ -866,12 +805,14 @@ code causes the transport connection to be broken.</p> Multiple <c>capabilities_cb</c> options can be specified, in which case the corresponding callbacks are applied until either all return <c>ok</c> or one does not.</p> + +<marker id="watchdog_timer"/> </item> <tag><c>{watchdog_timer, TwInit}</c></tag> <item> <code> -TwInit = Unsigned32() +TwInit = <seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso> | {M,F,A} </code> @@ -887,17 +828,19 @@ the callback.</p> <p> An integer value must be at least 6000 as required by RFC 3539. Defaults to 30000 if unspecified.</p> + +<marker id="reconnect_timer"/> </item> <tag><c>{reconnect_timer, Tc}</c></tag> <item> <code> -Tc = Unsigned32() +Tc = <seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso> </code> <p> For a connecting transport, the RFC 3588 Tc timer, in milliseconds. -Note that this timer determines the frequency with which the transport +Note that this timer determines the frequency with which a transport will attempt to establish a connection with its peer only <em>before</em> an initial connection is established: once there is an initial connection it's watchdog_timer that determines the frequency of @@ -910,12 +853,13 @@ regarded as an initial connection rather than a reestablishment, causing the RFC 3539 state machine to pass to state OPEN rather than REOPEN. Note that these semantics are not goverened by the RFC and -that a listening transport's reconnect_timer should be greater than its -peers's Tc plus jitter.</p> +that a listening transport's <c>reconnect_timer</c> should be greater +than its peer's Tw plus jitter.</p> <p> Defaults to 30000 for a connecting transport and 60000 for a listening transport.</p> + </item> </taglist> @@ -927,6 +871,15 @@ marker="#service_info">service_info/2</seealso> and can be referred to in predicate functions passed to <seealso marker="#remove_transport">remove_transport/2</seealso>.</p> +<marker id="transport_ref"/> +</item> + +<tag><c>transport_ref() = reference()</c></tag> +<item> +<p> +An reference returned by <seealso +marker="#add_transport">add_transport/2</seealso> that +identifies the configuration.</p> </item> </taglist> @@ -939,13 +892,13 @@ marker="#remove_transport">remove_transport/2</seealso>.</p> <!-- ===================================================================== --> <func> -<name>add_transport(SvcName, {connect|listen, Options}) +<name>add_transport(SvcName, {connect|listen, [Opt]}) -> {ok, Ref} | {error, Reason}</name> <fsummary>Add transport capability to a service.</fsummary> <type> -<v>SvcName = service_name()</v> -<v>Options = [transport_opt()]</v> -<v>Ref = ref()</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> +<v>Opt = <seealso marker="#transport_opt">transport_opt()</seealso></v> +<v>Ref = <seealso marker="#transport_ref">transport_ref()</seealso></v> <v>Reason = term()</v> </type> <desc> @@ -953,8 +906,8 @@ marker="#remove_transport">remove_transport/2</seealso>.</p> Add transport capability to a service.</p> <p> -The service will start a transport process(es) in order to establish a -connection with the peer, either by connecting to the peer +The service will start transport processes as required in order to +establish a connection with the peer, either by connecting to the peer (<c>connect</c>) or by accepting incoming connection requests (<c>listen</c>). A connecting transport establishes transport connections with at most @@ -969,16 +922,20 @@ marker="diameter_app#peer_up">peer_up/3</seealso> callback after which the caller can exchange Diameter messages with the peer over the transport. In addition to CER/CEA, the service takes responsibility for the -handling of DWR/DWA and required by RFC 3539 as well as for DPR/DPA.</p> +handling of DWR/DWA and required by RFC 3539, as well as for DPR/DPA.</p> <p> The returned reference uniquely identifies the transport within the scope of the service. Note that the function returns before a transport connection has been -established. +established.</p> + +<note> +<p> It is not an error to add a transport to a service that has not yet been configured: a service can be started after configuring -transports.</p> +its transports.</p> +</note> <marker id="call"/> </desc> @@ -987,48 +944,47 @@ transports.</p> <!-- ===================================================================== --> <func> -<name>call(SvcName, App, Request, Options) -> ok | Answer | {error, Reason}</name> +<name>call(SvcName, App, Request, [Opt]) -> Answer | ok | {error, Reason}</name> <fsummary>Send a Diameter request message.</fsummary> <type> -<v>SvcName = service_name()</v> -<v>App = application_alias()</v> -<v>Request = diameter_app:message() | term()</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> +<v>App = <seealso marker="#application_alias">application_alias()</seealso></v> +<v>Request = <seealso marker="diameter_app#message">diameter_app:message()</seealso></v> <v>Answer = term()</v> -<v>Options = [call_opt()]</v> +<v>Opt = <seealso marker="#call_opt">call_opt()</seealso></v> </type> <desc> <p> -Send a Diameter request message and possibly return the answer or error.</p> +Send a Diameter request message.</p> <p> -<c>App</c> identifies the Diameter application in which the request is +<c>App</c> specifies the Diameter application in which the request is defined and callbacks to the corresponding callback module will follow as described below and in <seealso marker="diameter_app">diameter_app(3)</seealso>. -Unless the <c>detach</c> option has been specified to cause an earlier -return, the call returns either when an answer message is received -from the peer or an error occurs. -In the case of an answer, the return value is as returned by a +Unless the <c>detach</c> option is specified, the call returns either +when an answer message is received from the peer or an error occurs. +In the answer case, the return value is as returned by a <seealso marker="diameter_app#handle_answer">handle_answer/4</seealso> callback. -In the case of an error, whether or not the error is returned directly +In the error case, whether or not the error is returned directly by diameter or from a <seealso marker="diameter_app#handle_error">handle_error/4</seealso> callback depends on whether or not the outgoing request is -successfully encoded for transmission from the peer, the cases being +successfully encoded for transmission to the peer, the cases being documented below.</p> <p> If there are no suitable peers, or if <seealso marker="diameter_app#pick_peer">pick_peer/4</seealso> -rejects them by returning 'false', then <c>{error, no_connection}</c> +rejects them by returning <c>false</c>, then <c>{error,no_connection}</c> is returned. Otherwise <seealso marker="diameter_app#pick_peer">pick_peer/4</seealso> is followed by a <seealso marker="diameter_app#prepare_request">prepare_request/3</seealso> -callback, the message is encoded and sent.</p> +callback, the message is encoded and then sent.</p> <p> There are several error cases which may prevent an @@ -1041,7 +997,7 @@ callback:</p> <item> <p> If the initial encode of the outgoing request -fails, then the request process fails and <c>{error, encode}</c> +fails, then the request process fails and <c>{error,encode}</c> is returned.</p> </item> @@ -1058,7 +1014,7 @@ callback takes place with <c>Reason = timeout</c>.</p> If the request is successfully encoded and sent but the service in question is stopped before an answer is received then a <seealso marker="diameter_app#handle_error">handle_error/4</seealso> -callback takes place <c>Reason = cancel</c>.</p> +callback takes place with <c>Reason = cancel</c>.</p> </item> <item> @@ -1085,7 +1041,7 @@ callback.</p> <p> If an encode error takes place during retransmission then the request process fails and -<c>{error, failure}</c> is returned.</p> +<c>{error,failure}</c> is returned.</p> </item> <item> @@ -1093,7 +1049,7 @@ retransmission then the request process fails and If an application callback made in processing the request fails (pick_peer, prepare_request, prepare_retransmit, handle_answer or handle_error) then either -<c>{error, encode}</c> or <c>{error, failure}</c> +<c>{error,encode}</c> or <c>{error,failure}</c> is returned depending on whether or not there has been an attempt to send the request over the transport.</p> </item> @@ -1101,9 +1057,9 @@ attempt to send the request over the transport.</p> </list> <p> -Note that <c>{error, encode}</c> is the only return value which +Note that <c>{error,encode}</c> is the only return value which guarantees that the request has <em>not</em> been sent over the -transport.</p> +transport connection.</p> <marker id="origin_state_id"/> </desc> @@ -1112,7 +1068,7 @@ transport.</p> <!-- ===================================================================== --> <func> -<name>origin_state_id() -> Unsigned32()</name> +<name>origin_state_id() -> <seealso marker="diameter_dict#DATA_TYPES">Unsigned32()</seealso></name> <fsummary>Returns a reasonable Origin-State-Id.</fsummary> <desc> <p> @@ -1121,7 +1077,7 @@ outgoing messages.</p> <p> The value returned is the number of seconds since 19680120T031408Z, -the first value that can be encoded as a Diameter Time(), +the first value that can be encoded as a Diameter <c><seealso marker="diameter_dict#DATA_TYPES">Time()</seealso></c>, at the time the diameter application was started.</p> <marker id="remove_transport"/> @@ -1134,11 +1090,11 @@ at the time the diameter application was started.</p> <name>remove_transport(SvcName, Pred) -> ok</name> <fsummary>Remove previously added transports.</fsummary> <type> -<v>SvcName = service_name()</v> -<v>Pred = Fun | MFA | ref() | list() | true | false</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> +<v>Pred = Fun | MFA | <seealso marker="#transport_ref">transport_ref()</seealso> | list() | true | false</v> <v></v> -<v>Fun = fun((reference(), connect|listen, list()) -> boolean())</v> -<v> | fun((reference(), list()) -> boolean())</v> +<v>Fun = fun((<seealso marker="#transport_ref">transport_ref()</seealso>, connect|listen, list()) -> boolean())</v> +<v> | fun((<seealso marker="#transport_ref">transport_ref()</seealso>, list()) -> boolean())</v> <v> | fun((list()) -> boolean())</v> <v>MFA = {atom(), atom(), list()}</v> </type> @@ -1152,23 +1108,23 @@ An arity-3-valued <c>Pred</c> removes all transports for which <c>Pred(Ref, Type, Opts)</c> returns <c>true</c>, where <c>Type</c> and <c>Opts</c> are as passed to <seealso marker="#add_transport">add_transport/2</seealso> and <c>Ref</c> is -as returned by the corresponding call. +as returned by it. The remaining forms are equivalent to an arity-3 fun as follows.</p> <code> -Pred = fun(reference(), list()): fun(Ref, _, Opts) -> Pred(Ref, Opts) end -Pred = fun(list()): fun(_, _, Opts) -> Pred(Opts) end -Pred = reference(): fun(Ref, _, _) -> Pred == Ref end -Pred = list(): fun(_, _, Opts) -> [] == Pred -- Opts end -Pred = true: fun(_, _, _) -> true end -Pred = false: fun(_, _, _) -> false end +Pred = fun(transport_ref(), list()): fun(Ref, _, Opts) -> Pred(Ref, Opts) end +Pred = fun(list()): fun(_, _, Opts) -> Pred(Opts) end +Pred = transport_ref(): fun(Ref, _, _) -> Pred == Ref end +Pred = list(): fun(_, _, Opts) -> [] == Pred -- Opts end +Pred = true: fun(_, _, _) -> true end +Pred = false: fun(_, _, _) -> false end Pred = {M,F,A}: fun(Ref, Type, Opts) -> apply(M, F, [Ref, Type, Opts | A]) end </code> <p> Removing a transport causes all associated transport connections to be broken. -A base application DPR message with +A DPR message with Disconnect-Cause <c>DO_NOT_WANT_TO_TALK_TO_YOU</c> will be sent to each connected peer before disassociating the transport configuration from the service and terminating the transport upon reception of @@ -1183,15 +1139,293 @@ DPA or timeout.</p> <!-- ===================================================================== --> <func> -<name>service_info(SvcName, Item) -> Value</name> -<fsummary>Return specific information about a started service.</fsummary> +<name>service_info(SvcName, Info) -> term()</name> +<fsummary>Return information about a started service.</fsummary> <type> -<v>SvcName = service_name()</v> -<v>Value = term()</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> +<v>Info = Item | [Info]</v> +<v>Item = atom()</v> </type> <desc> <p> -Return information about a started service.</p> +Return information about a started service. +<c>Item</c> can be one of the following.</p> + +<taglist> + +<tag><c>'Origin-Host'</c></tag> +<tag><c>'Origin-Realm'</c></tag> +<tag><c>'Vendor-Id'</c></tag> +<tag><c>'Product-Name'</c></tag> +<tag><c>'Origin-State-Id'</c></tag> +<tag><c>'Host-IP-Address'</c></tag> +<tag><c>'Supported-Vendor'</c></tag> +<tag><c>'Auth-Application-Id'</c></tag> +<tag><c>'Inband-Security-Id'</c></tag> +<tag><c>'Acct-Application-Id'</c></tag> +<tag><c>'Vendor-Specific-Application-Id'</c></tag> +<tag><c>'Firmware-Revision'</c></tag> +<item> +<p> +Return a capability value as configured with <seealso +marker="#start_service">start_service/2</seealso>.</p> +</item> + +<tag><c>applications</c></tag> +<item> +<p> +Return the list of applications as configured with <seealso +marker="#start_service">start_service/2</seealso>. +</p> +</item> + +<tag><c>capabilities</c></tag> +<item> +<p> +Return a tagged list of all capabilities values as configured with +<seealso +marker="#start_service">start_service/2</seealso>.</p> +</item> + +<tag><c>transport</c></tag> +<item> +<p> +Return a list containing one entry for each of the service's transport +as configured with <seealso +marker="#add_transport">add_transport/2</seealso>. +Each entry is a tagged list containing both configuration and +information about established peer connections. +An example return value with for a client service with Origin-Host +"client.example.com" configured with a single transport connected to +"server.example.com" might look as follows.</p> + +<code> +[[{ref,#Ref<0.0.0.93>}, + {type,connect}, + {options,[{transport_module,diameter_tcp}, + {transport_config,[{ip,{127,0,0,1}}, + {raddr,{127,0,0,1}}, + {rport,3868}, + {reuseaddr,true}]}]}, + {watchdog,{<0.66.0>,{1346,171491,996448},okay}}, + {peer,{<0.67.0>,{1346,171491,999906}}}, + {apps,[{0,common}]}, + {caps,[{origin_host,{"client.example.com","server.example.com"}}, + {origin_realm,{"example.com","example.com"}}, + {host_ip_address,{[{127,0,0,1}],[{127,0,0,1}]}}, + {vendor_id,{0,193}}, + {product_name,{"Client","Server"}}, + {origin_state_id,{[],[]}}, + {supported_vendor_id,{[],[]}}, + {auth_application_id,{[0],[0]}}, + {inband_security_id,{[],[0]}}, + {acct_application_id,{[],[]}}, + {vendor_specific_application_id,{[],[]}}, + {firmware_revision,{[],[]}}, + {avp,{[],[]}}]}, + {port,[{owner,<0.69.0>}, + {module,diameter_tcp}, + {socket,{{127,0,0,1},48758}}, + {peer,{{127,0,0,1},3868}}, + {statistics,[{recv_oct,656}, + {recv_cnt,6}, + {recv_max,148}, + {recv_avg,109}, + {recv_dvi,19}, + {send_oct,836}, + {send_cnt,6}, + {send_max,184}, + {send_avg,139}, + {send_pend,0}]}]}, + {statistics,[{{{0,258,0},recv},3}, + {{{0,258,1},send},3}, + {{{0,257,0},recv},1}, + {{{0,257,1},send},1}, + {{{0,258,0},recv,{'Result-Code',2001}},3}, + {{{0,280,1},recv},2}, + {{{0,280,0},send},2}]}]] +</code> + +<p> +Here <c>ref</c> is a <c><seealso +marker="#transport_ref">transport_ref()</seealso></c> and <c>options</c> +the corresponding <c><seealso +marker="#transport_opt">transport_opt()</seealso></c> list passed to <seealso +marker="#add_transport">add_transport/2</seealso>. +The <c>watchdog</c> entry shows the state of a connection's RFC 3539 watchdog +state machine. +The <c>peer</c> entry identifies the <c><seealso +marker="diameter_app#peer_ref">diameter_app:peer_ref()</seealso></c> for +which there will have been <seealso +marker="diameter_app#peer_up">peer_up</seealso> callbacks for the +Diameter applications identified by the <c>apps</c> entry, +<c>common</c> being the <c><seealso +marker="#application_alias">application_alias()</seealso></c>. +The <c>caps</c> entry identifies the capabilities sent by the local +node and received from the peer during capabilities exchange. +The <c>port</c> entry displays socket-level information about the +transport connection. +The <c>statistics</c> entry presents Diameter-level counters, +an entry like <c>{{{0,280,1},recv},2}</c> saying that the client has +received 2 DWR messages: <c>{0,280,1} = {Application_Id, Command_Code, +R_Flag}</c>.</p> + +<p> +Note that <c>watchdog</c>, <c>peer</c>, <c>apps</c>, <c>caps</c> +and <c>port</c> entries depend on connectivity +with the peer and may not be present. +Note also that the <c>statistics</c> entry presents values acuumulated +during the lifetime of the transport configuration.</p> + +<p> +A listening transport presents its information slightly differently +since there may be multiple accepted connections for the same <c><seealso +marker="#transport_ref">transport_ref()</seealso></c>. +The <c>transport</c> info returned by a server with a single client +connection might look as follows.</p> + +<code> +[[{ref,#Ref<0.0.0.61>}, + {type,listen}, + {options,[{transport_module,diameter_tcp}, + {transport_config,[{reuseaddr,true}, + {ip,{127,0,0,1}}, + {port,3868}]}]}, + {accept,[[{watchdog,{<0.56.0>,{1346,171481,226895},okay}}, + {peer,{<0.58.0>,{1346,171491,999511}}}, + {apps,[{0,common}]}, + {caps,[{origin_host,{"server.example.com","client.example.com"}}, + {origin_realm,{"example.com","example.com"}}, + {host_ip_address,{[{127,0,0,1}],[{127,0,0,1}]}}, + {vendor_id,{193,0}}, + {product_name,{"Server","Client"}}, + {origin_state_id,{[],[]}}, + {supported_vendor_id,{[],[]}}, + {auth_application_id,{[0],[0]}}, + {inband_security_id,{[],[]}}, + {acct_application_id,{[],[]}}, + {vendor_specific_application_id,{[],[]}}, + {firmware_revision,{[],[]}}, + {avp,{[],[]}}]}, + {port,[{owner,<0.62.0>}, + {module,diameter_tcp}, + {socket,{{127,0,0,1},3868}}, + {peer,{{127,0,0,1},48758}}, + {statistics,[{recv_oct,1576}, + {recv_cnt,16}, + {recv_max,184}, + {recv_avg,98}, + {recv_dvi,26}, + {send_oct,1396}, + {send_cnt,16}, + {send_max,148}, + {send_avg,87}, + {send_pend,0}]}]}], + [{watchdog,{<0.72.0>,{1346,171491,998404},initial}}]]}, + {statistics,[{{{0,280,0},recv},7}, + {{{0,280,1},send},7}, + {{{0,258,0},send,{'Result-Code',2001}},3}, + {{{0,258,1},recv},3}, + {{{0,258,0},send},3}, + {{{0,280,1},recv},5}, + {{{0,280,0},send},5}, + {{{0,257,1},recv},1}, + {{{0,257,0},send},1}]}]] +</code> + +<p> +The information presented here is as in the <c>connect</c> case except +that the client connections are grouped under an <c>accept</c> tuple.</p> + +</item> + +<tag><c>connections</c></tag> +<item> +<p> +Return a list containing one entry for every established transport +connection whose watchdog state machine is not in the <c>down</c> +state. +This is a flat view of <c>transport</c> info which lists only active +connections and for which Diameter-level statistics are accumulated +only for the lifetime of the transport connection. +A return value for the server above might look as follows.</p> + +<code> +[[{ref,#Ref<0.0.0.61>}, + {type,accept}, + {options,[{transport_module,diameter_tcp}, + {transport_config,[{reuseaddr,true}, + {ip,{127,0,0,1}}, + {port,3868}]}]}, + {watchdog,{<0.56.0>,{1346,171481,226895},okay}}, + {peer,{<0.58.0>,{1346,171491,999511}}}, + {apps,[{0,common}]}, + {caps,[{origin_host,{"server.example.com","client.example.com"}}, + {origin_realm,{"example.com","example.com"}}, + {host_ip_address,{[{127,0,0,1}],[{127,0,0,1}]}}, + {vendor_id,{193,0}}, + {product_name,{"Server","Client"}}, + {origin_state_id,{[],[]}}, + {supported_vendor_id,{[],[]}}, + {auth_application_id,{[0],[0]}}, + {inband_security_id,{[],[]}}, + {acct_application_id,{[],[]}}, + {vendor_specific_application_id,{[],[]}}, + {firmware_revision,{[],[]}}, + {avp,{[],[]}}]}, + {port,[{owner,<0.62.0>}, + {module,diameter_tcp}, + {socket,{{127,0,0,1},3868}}, + {peer,{{127,0,0,1},48758}}, + {statistics,[{recv_oct,10124}, + {recv_cnt,132}, + {recv_max,184}, + {recv_avg,76}, + {recv_dvi,9}, + {send_oct,10016}, + {send_cnt,132}, + {send_max,148}, + {send_avg,75}, + {send_pend,0}]}]}, + {statistics,[{{{0,280,0},recv},62}, + {{{0,280,1},send},62}, + {{{0,258,0},send,{'Result-Code',2001}},3}, + {{{0,258,1},recv},3}, + {{{0,258,0},send},3}, + {{{0,280,1},recv},66}, + {{{0,280,0},send},66}, + {{{0,257,1},recv},1}, + {{{0,257,0},send},1}]}]] +</code> + +<p> +Note that there may be multiple entries with the same <c>ref</c>, in +contrast to <c>transport</c> info.</p> +</item> + +<tag><c>statistics</c></tag> +<item> +<p> +Return a <c>{{Counter, Ref}, non_neg_integer()}</c> list of counter values. +<c>Ref</c> can be either a <c><seealso +marker="#transport_ref">transport_ref()</seealso></c> +or a <c><seealso +marker="diameter_app#peer_ref">diameter_app:peer_ref()</seealso></c>. +Entries for the latter are folded into corresponding entries for the +former as peer connections go down. +Entries for both are removed at <seealso +marker="#remove_transport">remove_transport/2</seealso>. +The Diameter-level statistics returned by <c>transport</c> and +<c>connections</c> info are based upon these entries.</p> +</item> + +</taglist> + +<p> +Requesting info for an unknown service causes <c>undefined</c> to be +returned. +Requesting a list of items causes a tagged list to be +returned.</p> <marker id="services"/> </desc> @@ -1203,7 +1437,7 @@ Return information about a started service.</p> <name>services() -> [SvcName]</name> <fsummary>Return the list of started services.</fsummary> <type> -<v>SvcName = service_name()</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> </type> <desc> <p> @@ -1216,10 +1450,10 @@ Return the list of started services.</p> <!-- ===================================================================== --> <func> -<name>session_id(Ident) -> OctetString()</name> +<name>session_id(Ident) -> <seealso marker="diameter_dict#DATA_TYPES">OctetString()</seealso></name> <fsummary>Return a value for a Session-Id AVP.</fsummary> <type> -<v>Ident = DiameterIdentity()</v> +<v>Ident = <seealso marker="diameter_dict#DATA_TYPES">DiameterIdentity()</seealso></v> </type> <desc> <p> @@ -1244,7 +1478,7 @@ Start the diameter application.</p> <p> The diameter application must be started before starting a service. -In a production system this will typically be accomplished by a boot +In a production system this is typically accomplished by a boot file, not by calling <c>start/0</c> explicitly.</p> <marker id="start_service"/> @@ -1256,8 +1490,8 @@ file, not by calling <c>start/0</c> explicitly.</p> <name>start_service(SvcName, Options) -> ok | {error, Reason}</name> <fsummary>Start a Diameter service.</fsummary> <type> -<v>SvcName = service_name()</v> -<v>Options = [service_opt()]</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> +<v>Options = [<seealso marker="#service_opt">service_opt()</seealso>]</v> <v>Reason = term()</v> </type> <desc> @@ -1265,11 +1499,19 @@ file, not by calling <c>start/0</c> explicitly.</p> Start a diameter service.</p> <p> -A service defines a locally-implemented Diameter peer, specifying the -capabilities of the peer to be used during capabilities exchange and -the Diameter applications that it supports. +A service defines a locally-implemented Diameter node, specifying the +capabilities to be advertised during capabilities exchange. Transports are added to a service using <seealso -marker="#add_transport">add_transport/2</seealso>.</p> +marker="#add_transport">add_transport/2</seealso>. +</p> + +<note> +<p> +A transport can both override its service's +capabilities and restrict its supported Diameter applications so +"service = Diameter node as identified by Origin-Host" is not +necessarily the case.</p> +</note> <marker id="stop_service"/> </desc> @@ -1295,13 +1537,26 @@ Stop the diameter application.</p> <name>stop_service(SvcName) -> ok | {error, Reason}</name> <fsummary>Stop a Diameter service.</fsummary> <type> -<v>SvcName = service_name()</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> <v>Reason = term()</v> </type> <desc> <p> Stop a diameter service.</p> +<p> +Stopping a service causes all associated transport connections to be +broken. +A DPR message with be sent as in the case of <seealso +marker="#remove_transport">remove_transport/2</seealso>.</p> + +<note> +<p> +Stopping a transport does not remove any associated transports: +<seealso marker="#remove_transport">remove_transport/2</seealso> must +be called to remove transport configuration.</p> +</note> + <marker id="subscribe"/> </desc> </func> @@ -1312,15 +1567,19 @@ Stop a diameter service.</p> <name>subscribe(SvcName) -> true</name> <fsummary>Subscribe to event messages.</fsummary> <type> -<v>SvcName = service_name()</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> </type> <desc> <p> -Subscribe to <c>service_event()</c> messages from a service.</p> +Subscribe to <c><seealso +marker="#service_event">service_event()</seealso></c> messages from +a service.</p> <p> It is not an error to subscribe to events from a service -that does not yet exist.</p> +that does not yet exist. +Doing so before adding transports is required to guarantee the +reception of all related events.</p> <marker id="unsubscribe"/> </desc> @@ -1332,7 +1591,7 @@ that does not yet exist.</p> <name>unsubscribe(SvcName) -> true</name> <fsummary>Unsubscribe to event messages.</fsummary> <type> -<v>SvcName = service_name()</v> +<v>SvcName = <seealso marker="#service_name">service_name()</seealso></v> </type> <desc> <p> |