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<reference id="GUID-12C9C36B-8AD4-544E-A6A3-54A799EF0280" xml:lang="en"><title>Socket

Server Reference</title><shortdesc>This topic provides a summary of related documentation for the

ESock APIs. </shortdesc><prolog><metadata><keywords/></metadata></prolog><refbody>

<section id="GUID-0D8CE9A1-7056-4A0B-A3D7-8469F9029341"><p>Socket Server APIs: </p> </section>

<table id="GUID-C269B63A-A1D7-5A4B-8608-65462143CBA6">

<tgroup cols="4"><colspec colname="col0"/><colspec colname="col1"/><colspec colname="col2"/><colspec colname="col3"/>

<thead>

<row>

<entry>Server session APIs</entry>

<entry/>

<entry>Header</entry>

<entry>Description</entry>

</row>

</thead>

<tbody>

<row>

<entry><p> <xref href="GUID-EF29C1D7-B1E5-370F-AE37-66231A6BE449.dita"><apiname>RSocketServ</apiname></xref>  </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> </entry>

<entry><p> </p> </entry>

<entry><p>ES_SOCK.H </p> </entry>

<entry><p>RSocketServ establishes and reserves resources for the base communication

session to the socket server. All other client interfaces require a valid

session to be opened </p> </entry>

</row>

<row>

<entry><p> <b>RSocketServ Subsession APIs</b>  </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-D4F08503-F1EF-3531-9C3C-4AF24A6255F0.dita"><apiname>RSocket</apiname></xref>  </p> </entry>

<entry><p>ES_SOCK.H </p> </entry>

<entry><p>End point for all socket-based communications. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-B16CAD6D-85B1-3482-AAC0-9BADEDB6ABDD.dita"><apiname>RHostResolver</apiname></xref>  </p> </entry>

<entry><p>ES_SOCK.H </p> </entry>

<entry><p>Makes host name resolution queries. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-BED8A733-2ED7-31AD-A911-C1F4707C67FD.dita"><apiname>RConnection</apiname></xref>  </p> </entry>

<entry><p>ES_SOCK.H </p> </entry>

<entry><p>Used to startup and manage active connections. It is possible to

start a connection either implicitly, via the RSocket or RHostResolver APIs,

or explicitly via the RConnection API. The RConnection creates a default subconnection. </p> <p> <xref href="GUID-5CFC075C-8F53-5E1B-A111-C6F4567DFD1E.dita">RConnection API Reference</xref>  </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-0AFDA357-EE44-3788-9CAB-162B874134BF.dita"><apiname>RSubConnection</apiname></xref>  </p> </entry>

<entry><p>ES_SOCK.H </p> </entry>

<entry><p>Used to organise channels within a connection and manage Quality

of Service. Multihoming-aware applications must use this API. Only valid in

the context of an RConnection. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-7489739B-3608-3F9F-BB02-DE65D7AA53A2.dita"><apiname>RNetDatabase</apiname></xref>  </p> </entry>

<entry><p>ES_SOCK.H </p> </entry>

<entry><p>Interface for network database access. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-DDD32F28-BA89-3CA1-93B0-355CDD9CD92D.dita"><apiname>RServiceResolver</apiname></xref>  </p> </entry>

<entry><p>ES_SOCK.H </p> </entry>

<entry><p>Provides an interface to resolve service names and ports. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-55FE59B7-4FA9-3B1A-BD4C-9B7611FE75C2.dita"><apiname>RConnectionServ</apiname></xref>  </p> </entry>

<entry/>

<entry><p>ES_SOCK.H </p> </entry>

<entry><p>Provides access to the Comms Management Plane, including Access

Point queries. </p> </entry>

</row>

</tbody>

</tgroup>

</table>

<section id="GUID-2214B4F9-FC01-4B86-B9CB-3A9A3769CE9C"><p>Bearer Mobility APIs </p> </section>

<table id="GUID-DDBADF88-8197-5C9A-AC0E-42099252DC93">

<tgroup cols="3"><colspec colname="col0"/><colspec colname="col1"/><colspec colname="col2"/>

<thead>

<row>

<entry>Bearer mobility APIs</entry>

<entry>Header</entry>

<entry>Description</entry>

</row>

</thead>

<tbody>

<row>

<entry><p> <xref href="GUID-6CA83252-4D0C-3B72-83ED-B5152B666C83.dita"><apiname>CActiveCommsMobilityApiExt</apiname></xref>  </p> </entry>

<entry><p>es_mobility_apiext.h </p> </entry>

<entry><p>Comms Mobility API extension for application client running an Active

Scheduler. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-D5F43DFB-5143-3563-8655-16E245A9735F.dita"><apiname>RCommsMobilityApiExt</apiname></xref>  </p> </entry>

<entry><p>es_mobility_apiext.h </p> </entry>

<entry><p>Comms Mobility API extension for application client not running

an Active Scheduler. </p> </entry>

</row>

<row>

<entry><p> <xref href="GUID-9A3979A9-F882-3053-B5B1-E0E125774271.dita"><apiname>MMobilityProtocolResp</apiname></xref>  </p> </entry>

<entry><p>es_mobility_apiext.h </p> </entry>

<entry><p>Interface to be implemented by the application client to support

mobility API extension. See <xref href="GUID-CB1E1921-9CF7-55B7-9F70-6AD61A961208.dita">Bearer

Mobility Client</xref>. </p> </entry>

</row>

</tbody>

</tgroup>

</table>

<section id="GUID-3CBE467D-11B7-40F7-B681-D40F4D48D18F"><p>How APIs related to the 3-Plane Comms Architecture. </p> <fig id="GUID-FC69453E-CA12-5CDB-A7E6-B2FA542BBE06">

<title>           Figure 1 - How ESock APIs related to the 3-Plane Comms Architecture

         </title>

<image href="GUID-239B8B32-5816-575E-97B1-FF7B68BC7575_d0e114300_href.png" placement="inline"/>

</fig> <p>The Sockets Client API also defines a number of support classes

used in conjunction with the above interfaces. These encapsulate: </p> <ul>

<li id="GUID-A1132B04-61D5-53E5-85A5-E7BBFA598B72"><p> <i>Addresses</i>: a

base address class <xref href="GUID-66228064-B6E7-3CE9-8F5E-5DED4CD9A49B.dita"><apiname>TSockAddr</apiname></xref> is defined. Specific protocol

address classes are derived from this. Each address can be identified by its

Protocol Family, an integer which identifies protocol suites from others. </p> </li>

<li id="GUID-BBD21B5C-20EE-5BC9-BEE4-00CB1565DE1E"><p> <i>Resolution queries</i>:

queries made through <xref href="GUID-B16CAD6D-85B1-3482-AAC0-9BADEDB6ABDD.dita"><apiname>RHostResolver</apiname></xref> objects are packaged

in <xref href="GUID-C625E339-6726-3FB9-8F8A-F4DB0CAC15FF.dita"><apiname>TNameEntry</apiname></xref> descriptors. These are packages for <xref href="GUID-567CF5B5-464F-37B7-A91E-6A672C39BA44.dita"><apiname>TNameRecord</apiname></xref> objects

that contain <xref href="GUID-66228064-B6E7-3CE9-8F5E-5DED4CD9A49B.dita"><apiname>TSockAddr</apiname></xref> objects to pass in addresses. </p> </li>

<li id="GUID-EFB76FB6-00D2-5C01-BE59-B748CAAAC61E"><p> <i>Protocol information</i>:

a comprehensive description of a protocol’s capabilities and properties can

be dynamically obtained through the <xref href="GUID-0FB20F20-67EE-3948-B9F6-E1D679AC3D0F.dita"><apiname>TProtocolDesc</apiname></xref> class.

Capabilities are identified by constants. </p> </li>

<li id="GUID-4BD6B3AA-4711-55BE-8F34-88B28EC2657F"><p> <i>Endian issues</i>: <xref href="GUID-8183BE9B-6118-3472-A271-8409751CA5EF.dita"><apiname>BigEndian</apiname></xref>, <xref href="GUID-55FDB45E-2759-3192-AEE2-D600B232682B.dita"><apiname>LittleEndian</apiname></xref>,

and <xref href="GUID-A934C24D-0E90-3D33-B4FC-654FB9004CFC.dita"><apiname>ByteOrder</apiname></xref> can be used to order integers to and from

network order. </p> </li>

</ul> </section>

<section id="GUID-7803B89A-6ABF-529C-A0B8-CA06BA410F3B"><title>RSubConnection

Events</title> <p> <b>CSubConGenEventDataClientJoined</b>, <b>CSubConGenEventDataClientLeft</b>  </p> <p>These

two events derive from <xref href="GUID-1C0CC85E-38A7-3E7A-9246-940DCCE44EB0.dita"><apiname>CSubConGenEventDataClientBase</apiname></xref>, which

provides the functionality for both. The source and destination end points

of the data client are presented with this event, along with the IAP ID of

the connection on which it was created. </p> <p> <b>CSubConNotificationEvent</b>  </p> <p>Both

generic and extension sub-connection events derive from this class. The rules

for generic and extension events are the same as for parameter sets. That

is, a generic event MUST be able to be understood by all technologies. </p> <p>The <codeph>IsGeneric()</codeph> method

identifies whether the event is generic. </p> <p>The <codeph>GroupId()</codeph> method

returns the UID of the factory that contains the event, and <codeph>Id()</codeph> returns

the class type Id within that factory. These two pieces of information comprise

the <xref href="GUID-FEE87408-3FAA-31BB-A0C2-4BDEB279D4BA.dita"><apiname>STypeId</apiname></xref> of the event. </p> <p> <b>CSubConGenEventParamsGranted</b>  </p> <p>Notification

of this event occurs after a request to <codeph>SetParameters()</codeph> has

been made and negotiation with the network has been completed. A notification

will be received for each family contained in the parameter bundle that was

negotiated successfully. This event presents a generic set and zero or more

extension sets (providing they are supported by the underlying sub-connection

provider technology) of the parameter family identified by the Id returned

from <codeph>GetFamily()</codeph>. </p> <p> <b>CSubConGenEventParamsRejected</b>  </p> <p>Notification

of this event occurs after a request to <codeph>SetParameters()</codeph> has

been made and negotiation with the network has failed for some reason. It

could be an error within the handset software/configuration, or that the network

could not provide the acceptable (minimum) level of QoS. The reason for failure

and the parameter family are presented by the accessor methods <codeph>Error()</codeph> and <codeph>FamilyId()</codeph>.

Like the <xref href="GUID-AA6CFA1E-0B17-3603-9065-34D05322C0A5.dita"><apiname>CSubConGenEventParamsGranted</apiname></xref> event, a notification

for <xref href="GUID-7103CFA3-2119-3356-9460-B26D88036FEB.dita"><apiname>CSubConGenEventParamsRejected</apiname></xref> is received for each

family in the parameter bundle that could not be negotiated successfully. </p> <p> <b>CSubConGenEventParamsChanged</b>  </p> <p>This

event occurs when the properties of a parameter family has been renegotiated

due to some event on the network. It is not sent in response to a request

to change the properties. The change could be the result of an error or just

that the level of QoS has improved/worsened. If a new set of parameters are

available they’ll be presented as with the <xref href="GUID-AA6CFA1E-0B17-3603-9065-34D05322C0A5.dita"><apiname>CSubConGenEventParamsGranted</apiname></xref> event.

The error status is presented via the <codeph>Error()</codeph> method. </p> <p> <b>CSubConGenEventSubConDown</b>  </p> <p>This

event occurs when the underlying sub-connection has been lost. This could

be due to request for it to be closed, or some error on the network. The error

status is presented via the <codeph>Error()</codeph> method. </p> </section>

<section id="GUID-7F057E16-0E56-5989-8647-7DAFF6E343D3"><title>RSubConnection

QoS Parameters</title> <p> <b>CSubConQosGenericParamSet</b>  </p> <table id="GUID-227CFC6C-C38B-516F-AB6D-C3C2D51EA4A3">

<tgroup cols="3"><colspec colname="col0"/><colspec colname="col1"/><colspec colname="col2"/>

<thead>

<row>

<entry> Parameter </entry>

<entry> Description </entry>

<entry>Directions</entry>

</row>

</thead>

<tbody>

<row>

<entry><p>Bandwidth </p> </entry>

<entry><p>Bandwidth the client requires </p> </entry>

<entry><p>Uplink / Downlink </p> </entry>

</row>

<row>

<entry><p>Maximum Burst Size </p> </entry>

<entry><p>Maximum size of a burst of data the client can handle </p> </entry>

<entry><p>Uplink / Downlink </p> </entry>

</row>

<row>

<entry><p>Average Packet Size </p> </entry>

<entry><p>Average packet size required (e.g. codec use) </p> </entry>

<entry><p>Uplink / Downlink </p> </entry>

</row>

<row>

<entry><p>Maximum Packet Size </p> </entry>

<entry><p>Maximum packet size the client can handle </p> </entry>

<entry><p>Uplink / Downlink </p> </entry>

</row>

<row>

<entry><p>Delay </p> </entry>

<entry><p>Acceptable Delay/Latency </p> </entry>

<entry><p>Uplink / Downlink </p> </entry>

</row>

<row>

<entry><p>Delay Variation </p> </entry>

<entry><p>Acceptable variation in delay (also known as jitter) </p> </entry>

<entry><p>Uplink / Downlink </p> </entry>

</row>

<row>

<entry><p>Priority </p> </entry>

<entry><p>Relative priority the client expects to give this channel compared

to it’s other channels </p> </entry>

<entry><p>Uplink / Downlink </p> </entry>

</row>

<row>

<entry><p>Header mode </p> </entry>

<entry><p>Specify whether the header size should be calculated by the QoS

module or specified by the client. Default is to let the QoS module calculate

it. </p> </entry>

<entry><p>N/A </p> </entry>

</row>

<row>

<entry><p>Name </p> </entry>

<entry><p>Identity of a “well known” set of QoS Parameters. </p> </entry>

<entry><p>N/A </p> </entry>

</row>

</tbody>

</tgroup>

</table> <p>If an extension parameter set is added to the family that contains

conceptually identical parameters to those in the generic set, it is recommended

that you set both instances (generic and extension) of those parameters. </p> <p> <b>CSubConQosIPLinkR99ParamSet</b> / <b>CSubConQosR99ParamSet</b>  </p> <p>Getter and setter methods are provided for each parameter. </p> <p> <b>Note: </b> The

constants used for it are <xref href="GUID-04E17A74-BFAB-3DB7-998B-5BCB8A5FB4CC.dita"><apiname>KSubConIPParamsUid</apiname></xref> and <xref href="GUID-41202CC9-3547-3404-AF6C-678A36BAE7D9.dita"><apiname>KSubConQosIPLinkR99ParamsType</apiname></xref>. </p> <p>The

following parameter sets are available in Symbian platform. </p> <p> <b>CSubConQosR5ParamSet</b>  </p> <p>It

inherits from the release 4/99 set <codeph>CSubConQosR99ParamSet</codeph>.

Although it is possible to add both this parameter set and the R4/R99 one,

it is not necessary and should not be done. </p> <p> <b>CSubConIMSExtParamSet</b>  </p> <p>This

class contains the IM CN Signalling Indicator flag. </p> </section>

<section id="GUID-8797CEEF-CC6D-4B72-9C85-1B0E0188AA58"><title>Test programs</title> <p>None </p> </section>