IceAgent.c File Reference

#include "../Include_i.h"

Include dependency graph for IceAgent.c:

Macros
#define	LOG_CLASS   "IceAgent"
#define	MARK_STUNS_SRFLX_CANDIDATE_INVALID(logFn, candidate, ...)

Enumerations

enum

SDP_ICE_CANDIDATE_PARSER_STATE {   SDP_ICE_CANDIDATE_PARSER_STATE_FOUNDATION = 0 , SDP_ICE_CANDIDATE_PARSER_STATE_COMPONENT , SDP_ICE_CANDIDATE_PARSER_STATE_PROTOCOL , SDP_ICE_CANDIDATE_PARSER_STATE_PRIORITY ,   SDP_ICE_CANDIDATE_PARSER_STATE_IP , SDP_ICE_CANDIDATE_PARSER_STATE_PORT , SDP_ICE_CANDIDATE_PARSER_STATE_TYPE_ID , SDP_ICE_CANDIDATE_PARSER_STATE_TYPE_VAL ,   SDP_ICE_CANDIDATE_PARSER_STATE_OTHERS }

Functions
STATUS	createIceAgent (PCHAR username, PCHAR password, PIceAgentCallbacks pIceAgentCallbacks, PRtcConfiguration pRtcConfiguration, TIMER_QUEUE_HANDLE timerQueueHandle, PConnectionListener pConnectionListener, PIceAgent *ppIceAgent)
STATUS	freeIceAgent (PIceAgent *ppIceAgent)
STATUS	iceAgentAddIceServers (PIceAgent pIceAgent, PRtcIceServer pIceServers, UINT32 iceServersCount)
STATUS	iceAgentValidateKvsRtcConfig (PKvsRtcConfiguration pKvsRtcConfiguration)
STATUS	iceAgentReportNewLocalCandidate (PIceAgent pIceAgent, PIceCandidate pIceCandidate)
STATUS	iceAgentAddRemoteCandidate (PIceAgent pIceAgent, PCHAR pIceCandidateString)
STATUS	iceAgentInitHostCandidate (PIceAgent pIceAgent)
STATUS	iceAgentStartAgent (PIceAgent pIceAgent, PCHAR remoteUsername, PCHAR remotePassword, BOOL isControlling)
STATUS	iceAgentStartGathering (PIceAgent pIceAgent)
STATUS	iceAgentSendPacket (PIceAgent pIceAgent, PBYTE pBuffer, UINT32 bufferLen)
STATUS	iceAgentPopulateSdpMediaDescriptionCandidates (PIceAgent pIceAgent, PSdpMediaDescription pSdpMediaDescription, UINT32 attrBufferLen, PUINT32 pIndex)
STATUS	iceAgentShutdown (PIceAgent pIceAgent)
STATUS	iceAgentRestart (PIceAgent pIceAgent, PCHAR localIceUfrag, PCHAR localIcePwd)
STATUS	findCandidateWithIp (PKvsIpAddress pIpAddress, PDoubleList pCandidateList, PIceCandidate *ppIceCandidate)
STATUS	findCandidateWithSocketConnection (PSocketConnection pSocketConnection, PDoubleList pCandidateList, PIceCandidate *ppIceCandidate)
STATUS	createIceCandidatePairs (PIceAgent pIceAgent, PIceCandidate pIceCandidate, BOOL isRemoteCandidate)
STATUS	freeIceCandidatePair (PIceCandidatePair *ppIceCandidatePair)
STATUS	insertIceCandidatePair (PDoubleList iceCandidatePairs, PIceCandidatePair pIceCandidatePair)
STATUS	findIceCandidatePairWithLocalSocketConnectionAndRemoteAddr (PIceAgent pIceAgent, PSocketConnection pSocketConnection, PKvsIpAddress pRemoteAddr, BOOL checkPort, PIceCandidatePair *ppIceCandidatePair)
STATUS	pruneUnconnectedIceCandidatePair (PIceAgent pIceAgent)
STATUS	iceCandidatePairCheckConnection (PStunPacket pStunBindingRequest, PIceAgent pIceAgent, PIceCandidatePair pIceCandidatePair)
STATUS	iceAgentSendStunPacket (PStunPacket pStunPacket, PBYTE password, UINT32 passwordLen, PIceAgent pIceAgent, PIceCandidate pLocalCandidate, PKvsIpAddress pDestAddr)
STATUS	iceAgentStateTransitionTimerCallback (UINT32 timerId, UINT64 currentTime, UINT64 customData)
STATUS	iceAgentSendSrflxCandidateRequest (PIceAgent pIceAgent)
STATUS	iceAgentCheckCandidatePairConnection (PIceAgent pIceAgent)
STATUS	iceAgentSendKeepAliveTimerCallback (UINT32 timerId, UINT64 currentTime, UINT64 customData)
STATUS	iceAgentGatherCandidateTimerCallback (UINT32 timerId, UINT64 currentTime, UINT64 customData)
STATUS	iceAgentSendCandidateNomination (PIceAgent pIceAgent)
STATUS	iceAgentInitSrflxCandidate (PIceAgent pIceAgent)
STATUS	iceAgentInitRelayCandidates (PIceAgent pIceAgent)
STATUS	turnStateFailedFn (PSocketConnection pSocketConnection, UINT64 data)
STATUS	iceAgentInitRelayCandidate (PIceAgent pIceAgent, UINT32 iceServerIndex, KVS_SOCKET_PROTOCOL protocol, KVS_IP_FAMILY_TYPE turnServerIpFamily)
STATUS	iceAgentCheckConnectionStateSetup (PIceAgent pIceAgent)
STATUS	updateCandidateStats (PIceAgent pIceAgent, BOOL isRemote)
STATUS	updateSelectedLocalRemoteCandidateStats (PIceAgent pIceAgent)
STATUS	iceAgentConnectedStateSetup (PIceAgent pIceAgent)
STATUS	iceAgentNominatingStateSetup (PIceAgent pIceAgent)
STATUS	iceAgentReadyStateSetup (PIceAgent pIceAgent)
STATUS	iceAgentNominateCandidatePair (PIceAgent pIceAgent)
STATUS	iceAgentInvalidateCandidatePair (PIceAgent pIceAgent)
STATUS	incomingRelayedDataHandler (UINT64 customData, PSocketConnection pSocketConnection, PBYTE pBuffer, UINT32 bufferLen, PKvsIpAddress pSrc, PKvsIpAddress pDest)
STATUS	incomingDataHandler (UINT64 customData, PSocketConnection pSocketConnection, PBYTE pBuffer, UINT32 bufferLen, PKvsIpAddress pSrc, PKvsIpAddress pDest)
STATUS	iceCandidateSerialize (PIceCandidate pIceCandidate, PCHAR pOutputData, PUINT32 pOutputLength)
STATUS	handleStunPacket (PIceAgent pIceAgent, PBYTE pBuffer, UINT32 bufferLen, PSocketConnection pSocketConnection, PKvsIpAddress pSrcAddr, PKvsIpAddress pDestAddr, PSocketConnection *ppSocketConnectionToShutdown)
STATUS	iceAgentCheckPeerReflexiveCandidate (PIceAgent pIceAgent, PKvsIpAddress pIpAddress, UINT32 priority, BOOL isRemote, PSocketConnection pSocketConnection)
STATUS	iceAgentFatalError (PIceAgent pIceAgent, STATUS errorStatus)
VOID	iceAgentLogNewCandidate (PIceCandidate pIceCandidate)
STATUS	updateCandidateAddress (PIceCandidate pIceCandidate, PKvsIpAddress pIpAddr)
UINT32	computeCandidatePriority (PIceCandidate pIceCandidate)
UINT64	computeCandidatePairPriority (PIceCandidatePair pIceCandidatePair, BOOL isLocalControlling)
PCHAR	iceAgentGetCandidateTypeStr (ICE_CANDIDATE_TYPE candidateType)
UINT64	iceAgentGetCurrentTime (UINT64 customData)
STATUS	getIceAgentStats (PIceAgent pIceAgent, PKvsIceAgentMetrics pKvsIceAgentMetrics)

Variables
StateMachineState	ICE_AGENT_STATE_MACHINE_STATES []
UINT32	ICE_AGENT_STATE_MACHINE_STATE_COUNT

Macro Definition Documentation

LOG_CLASS

#define LOG_CLASS   "IceAgent"

Ice Agent APIs

MARK_STUNS_SRFLX_CANDIDATE_INVALID

#define MARK_STUNS_SRFLX_CANDIDATE_INVALID	(		logFn,
			candidate,
			... )

Value:

    do {                                                                                                                                             \
        logFn(__VA_ARGS__);                                                                                                                          \
        (candidate)->state = ICE_CANDIDATE_STATE_INVALID;                                                                                            \
    } while (0)

Enumeration Type Documentation

SDP_ICE_CANDIDATE_PARSER_STATE

enum SDP_ICE_CANDIDATE_PARSER_STATE

Enumerator
SDP_ICE_CANDIDATE_PARSER_STATE_FOUNDATION
SDP_ICE_CANDIDATE_PARSER_STATE_COMPONENT
SDP_ICE_CANDIDATE_PARSER_STATE_PROTOCOL
SDP_ICE_CANDIDATE_PARSER_STATE_PRIORITY
SDP_ICE_CANDIDATE_PARSER_STATE_IP
SDP_ICE_CANDIDATE_PARSER_STATE_PORT
SDP_ICE_CANDIDATE_PARSER_STATE_TYPE_ID
SDP_ICE_CANDIDATE_PARSER_STATE_TYPE_VAL
SDP_ICE_CANDIDATE_PARSER_STATE_OTHERS

Function Documentation

computeCandidatePairPriority()

UINT64 computeCandidatePairPriority	(	PIceCandidatePair	pIceCandidatePair,
		BOOL	isLocalControlling )

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computeCandidatePriority()

UINT32 computeCandidatePriority

(

PIceCandidate

pIceCandidate

)

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createIceAgent()

STATUS createIceAgent	(	PCHAR	username,
		PCHAR	password,
		PIceAgentCallbacks	pIceAgentCallbacks,
		PRtcConfiguration	pRtcConfiguration,
		TIMER_QUEUE_HANDLE	timerQueueHandle,
		PConnectionListener	pConnectionListener,
		PIceAgent *	ppIceAgent )

allocate the IceAgent struct and store username and password

Parameters

-	PCHAR - IN - username
-	PCHAR - IN - password
-	PIceAgentCallbacks - IN - callback for inbound packets
-	PRtcConfiguration - IN - RtcConfig
-	PIceAgent* - OUT - the created IceAgent struct

Returns

- STATUS - status of execution

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createIceCandidatePairs()

STATUS createIceCandidatePairs	(	PIceAgent	pIceAgent,
		PIceCandidate	pIceCandidate,
		BOOL	isRemoteCandidate )

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findCandidateWithIp()

STATUS findCandidateWithIp	(	PKvsIpAddress	pIpAddress,
		PDoubleList	pCandidateList,
		PIceCandidate *	ppIceCandidate )

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findCandidateWithSocketConnection()

STATUS findCandidateWithSocketConnection	(	PSocketConnection	pSocketConnection,
		PDoubleList	pCandidateList,
		PIceCandidate *	ppIceCandidate )

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findIceCandidatePairWithLocalSocketConnectionAndRemoteAddr()

STATUS findIceCandidatePairWithLocalSocketConnectionAndRemoteAddr	(	PIceAgent	pIceAgent,
		PSocketConnection	pSocketConnection,
		PKvsIpAddress	pRemoteAddr,
		BOOL	checkPort,
		PIceCandidatePair *	ppIceCandidatePair )

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freeIceAgent()

STATUS freeIceAgent

(

PIceAgent *

ppIceAgent

)

Not thread-safe

Parameters

ppIceAgent

Returns

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freeIceCandidatePair()

STATUS freeIceCandidatePair

(

PIceCandidatePair *

ppIceCandidatePair

)

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getIceAgentStats()

STATUS getIceAgentStats	(	PIceAgent	pIceAgent,
		PKvsIceAgentMetrics	pKvsIceAgentMetrics )

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handleStunPacket()

STATUS handleStunPacket	(	PIceAgent	pIceAgent,
		PBYTE	pBuffer,
		UINT32	bufferLen,
		PSocketConnection	pSocketConnection,
		PKvsIpAddress	pSrcAddr,
		PKvsIpAddress	pDestAddr,
		PSocketConnection *	ppSocketConnectionToShutdown )

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iceAgentAddIceServers()

STATUS iceAgentAddIceServers	(	PIceAgent	pIceAgent,
		PRtcIceServer	pIceServers,
		UINT32	iceServersCount )

Add new ICE servers to an existing ICE agent and initialize relay candidates for TURN servers

Parameters

-	PIceAgent - IN - IceAgent object
-	PRtcIceServer - IN - Array of new ICE servers to add
-	UINT32 - IN - Number of ICE servers in the array

Returns

- STATUS - status of execution

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iceAgentAddRemoteCandidate()

STATUS iceAgentAddRemoteCandidate	(	PIceAgent	pIceAgent,
		PCHAR	pIceCandidateString )

if PIceCandidate doesnt exist already in remoteCandidates, create a copy and add to remoteCandidates

Parameters

-	PIceAgent - IN - IceAgent object
-	PIceCandidate - IN - new remote candidate to add

Returns

- STATUS - status of execution

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iceAgentCheckCandidatePairConnection()

STATUS iceAgentCheckCandidatePairConnection

(

PIceAgent

pIceAgent

)

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iceAgentCheckConnectionStateSetup()

STATUS iceAgentCheckConnectionStateSetup

(

PIceAgent

pIceAgent

)

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iceAgentCheckPeerReflexiveCandidate()

STATUS iceAgentCheckPeerReflexiveCandidate	(	PIceAgent	pIceAgent,
		PKvsIpAddress	pIpAddress,
		UINT32	priority,
		BOOL	isRemote,
		PSocketConnection	pSocketConnection )

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iceAgentConnectedStateSetup()

STATUS iceAgentConnectedStateSetup

(

PIceAgent

pIceAgent

)

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iceAgentFatalError()

STATUS iceAgentFatalError	(	PIceAgent	pIceAgent,
		STATUS	errorStatus )

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iceAgentGatherCandidateTimerCallback()

STATUS iceAgentGatherCandidateTimerCallback	(	UINT32	timerId,
		UINT64	currentTime,
		UINT64	customData )

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iceAgentGetCandidateTypeStr()

PCHAR iceAgentGetCandidateTypeStr

(

ICE_CANDIDATE_TYPE

candidateType

)

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iceAgentGetCurrentTime()

UINT64 iceAgentGetCurrentTime

(

UINT64

customData

)

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iceAgentInitHostCandidate()

STATUS iceAgentInitHostCandidate

(

PIceAgent

pIceAgent

)

gather local IP addresses and create a udp port. If port creation succeeded then create a new candidate and store it in localCandidates. Ips that are already a local candidate will not be added again.

Parameters

-	PIceAgent - IN - IceAgent object

Returns

- STATUS - status of execution

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iceAgentInitRelayCandidate()

STATUS iceAgentInitRelayCandidate	(	PIceAgent	pIceAgent,
		UINT32	iceServerIndex,
		KVS_SOCKET_PROTOCOL	protocol,
		KVS_IP_FAMILY_TYPE	turnServerIpFamily )

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iceAgentInitRelayCandidates()

STATUS iceAgentInitRelayCandidates

(

PIceAgent

pIceAgent

)

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iceAgentInitSrflxCandidate()

STATUS iceAgentInitSrflxCandidate

(

PIceAgent

pIceAgent

)

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iceAgentInvalidateCandidatePair()

STATUS iceAgentInvalidateCandidatePair

(

PIceAgent

pIceAgent

)

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iceAgentLogNewCandidate()

VOID iceAgentLogNewCandidate

(

PIceCandidate

pIceCandidate

)

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iceAgentNominateCandidatePair()

STATUS iceAgentNominateCandidatePair

(

PIceAgent

pIceAgent

)

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iceAgentNominatingStateSetup()

STATUS iceAgentNominatingStateSetup

(

PIceAgent

pIceAgent

)

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iceAgentPopulateSdpMediaDescriptionCandidates()

STATUS iceAgentPopulateSdpMediaDescriptionCandidates	(	PIceAgent	pIceAgent,
		PSdpMediaDescription	pSdpMediaDescription,
		UINT32	attrBufferLen,
		PUINT32	pIndex )

Starting from given index, fillout PSdpMediaDescription->sdpAttributes with serialize local candidate strings.

Parameters

-	PIceAgent - IN - IceAgent object
-	PSdpMediaDescription - IN - PSdpMediaDescription object whose sdpAttributes will be filled with local candidate strings
-	UINT32 - IN - buffer length of pSdpMediaDescription->sdpAttributes[index].attributeValue
-	PUINT32 - IN - starting index in sdpAttributes

Returns

- STATUS - status of execution

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iceAgentReadyStateSetup()

STATUS iceAgentReadyStateSetup

(

PIceAgent

pIceAgent

)

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iceAgentReportNewLocalCandidate()

STATUS iceAgentReportNewLocalCandidate	(	PIceAgent	pIceAgent,
		PIceCandidate	pIceCandidate )

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iceAgentRestart()

STATUS iceAgentRestart	(	PIceAgent	pIceAgent,
		PCHAR	localIceUfrag,
		PCHAR	localIcePwd )

Restart IceAgent. IceAgent is reset back to the same state when it was first created. Once iceAgentRestart() return, call iceAgentStartGathering() to start gathering and call iceAgentStartAgent() to give iceAgent the new remote uFrag and uPwd. While Ice is restarting, iceAgentSendPacket can still be called to send data if a connected pair exists.

Parameters

-	PIceAgent - IN - IceAgent object
-	PCHAR - IN - new local uFrag
-	PCHAR - IN - new local uPwd

Returns

- STATUS - status of execution

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iceAgentSendCandidateNomination()

STATUS iceAgentSendCandidateNomination

(

PIceAgent

pIceAgent

)

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iceAgentSendKeepAliveTimerCallback()

STATUS iceAgentSendKeepAliveTimerCallback	(	UINT32	timerId,
		UINT64	currentTime,
		UINT64	customData )

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iceAgentSendPacket()

STATUS iceAgentSendPacket	(	PIceAgent	pIceAgent,
		PBYTE	pBuffer,
		UINT32	bufferLen )

Send data through selected connection. PIceAgent has to be in ICE_AGENT_CONNECTION_STATE_CONNECTED state.

Parameters

-	PIceAgent - IN - IceAgent object
-	PBYTE - IN - buffer storing the data to be sent
-	UINT32 - IN - length of data

Returns

- STATUS - status of execution

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iceAgentSendSrflxCandidateRequest()

STATUS iceAgentSendSrflxCandidateRequest

(

PIceAgent

pIceAgent

)

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iceAgentSendStunPacket()

STATUS iceAgentSendStunPacket	(	PStunPacket	pStunPacket,
		PBYTE	password,
		UINT32	passwordLen,
		PIceAgent	pIceAgent,
		PIceCandidate	pLocalCandidate,
		PKvsIpAddress	pDestAddr )

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iceAgentShutdown()

STATUS iceAgentShutdown

(

PIceAgent

pIceAgent

)

Start shutdown sequence for IceAgent. Once the function returns Ice will not deliver anymore data and IceAgent is ready to be freed. User should stop calling iceAgentSendPacket after iceAgentShutdown returns. iceAgentShutdown is idempotent.

Parameters

-	PIceAgent - IN - IceAgent object

Returns

- STATUS - status of execution

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iceAgentStartAgent()

STATUS iceAgentStartAgent	(	PIceAgent	pIceAgent,
		PCHAR	remoteUsername,
		PCHAR	remotePassword,
		BOOL	isControlling )

Initiates stun communication with remote candidates.

Parameters

-	PIceAgent - IN - IceAgent object
-	PCHAR - IN - remote username
-	PCHAR - IN - remote password
-	BOOL - IN - is controlling agent

Returns

- STATUS - status of execution

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iceAgentStartGathering()

STATUS iceAgentStartGathering

(

PIceAgent

pIceAgent

)

Initiates candidate gathering

Parameters

-	PIceAgent - IN - IceAgent object

Returns

- STATUS - status of execution

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iceAgentStateTransitionTimerCallback()

STATUS iceAgentStateTransitionTimerCallback	(	UINT32	timerId,
		UINT64	currentTime,
		UINT64	customData )

timer queue callbacks are interlocked by time queue lock.

Parameters

timerId	- timer queue task id
currentTime
customData	- custom data passed to timer queue when task was added

Returns

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iceAgentValidateKvsRtcConfig()

STATUS iceAgentValidateKvsRtcConfig

(

PKvsRtcConfiguration

pKvsRtcConfiguration

)

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iceCandidatePairCheckConnection()

STATUS iceCandidatePairCheckConnection	(	PStunPacket	pStunBindingRequest,
		PIceAgent	pIceAgent,
		PIceCandidatePair	pIceCandidatePair )

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iceCandidateSerialize()

STATUS iceCandidateSerialize	(	PIceCandidate	pIceCandidate,
		PCHAR	pOutputData,
		PUINT32	pOutputLength )

Serialize a candidate for Trickle ICE or exchange via SDP

Parameters

-	PIceAgent - IN - IceAgent object
-	PCHAR - OUT - Destination buffer
-	UINT32 - OUT - Size of destination buffer

Returns

- STATUS - status of execution

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incomingDataHandler()

STATUS incomingDataHandler	(	UINT64	customData,
		PSocketConnection	pSocketConnection,
		PBYTE	pBuffer,
		UINT32	bufferLen,
		PKvsIpAddress	pSrc,
		PKvsIpAddress	pDest )

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incomingRelayedDataHandler()

STATUS incomingRelayedDataHandler	(	UINT64	customData,
		PSocketConnection	pSocketConnection,
		PBYTE	pBuffer,
		UINT32	bufferLen,
		PKvsIpAddress	pSrc,
		PKvsIpAddress	pDest )

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insertIceCandidatePair()

STATUS insertIceCandidatePair	(	PDoubleList	iceCandidatePairs,
		PIceCandidatePair	pIceCandidatePair )

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pruneUnconnectedIceCandidatePair()

STATUS pruneUnconnectedIceCandidatePair

(

PIceAgent

pIceAgent

)

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turnStateFailedFn()

STATUS turnStateFailedFn	(	PSocketConnection	pSocketConnection,
		UINT64	data )

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updateCandidateAddress()

STATUS updateCandidateAddress	(	PIceCandidate	pIceCandidate,
		PKvsIpAddress	pIpAddr )

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updateCandidateStats()

STATUS updateCandidateStats	(	PIceAgent	pIceAgent,
		BOOL	isRemote )

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updateSelectedLocalRemoteCandidateStats()

STATUS updateSelectedLocalRemoteCandidateStats

(

PIceAgent

pIceAgent

)

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Variable Documentation

ICE_AGENT_STATE_MACHINE_STATE_COUNT

UINT32 ICE_AGENT_STATE_MACHINE_STATE_COUNT

extern

ICE_AGENT_STATE_MACHINE_STATES

StateMachineState ICE_AGENT_STATE_MACHINE_STATES[]

extern

Static definitions of the states