#include <string.h>
#include <stdbool.h>
#include "cipconnectionmanager.h"
#include "opener_user_conf.h"
#include "cipcommon.h"
#include "cipmessagerouter.h"
#include "ciperror.h"
#include "endianconv.h"
#include "opener_api.h"
#include "encap.h"
#include "cipidentity.h"
#include "trace.h"
#include "cipconnectionobject.h"
#include "cipclass3connection.h"
#include "cipioconnection.h"
#include "cipassembly.h"
#include "cpf.h"
#include "appcontype.h"
#include "generic_networkhandler.h"
#include "cipepath.h"
#include "cipelectronickey.h"
#include "cipqos.h"

Include dependency graph for cipconnectionmanager.c:

Data Structures
struct	ConnectionManagementHandling

Typedefs
typedef EipStatus(*	HandleForwardOpenRequestFunction )(CipConnectionObject connection_object, CipInstance instance, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response)
	Function prototype for all Forward Open handle functions. More...

Functions
EipStatus	AddConnectableObject (const EipUint32 class_id, OpenConnectionFunction open_connection_function)
	register open functions for an specific object. More...

void	AddNewActiveConnection (const CipConnectionObject *const connection_object)
	Insert the given connection object to the list of currently active and managed connections. More...

void	AddNullAddressItem (CipCommonPacketFormatData *common_data_packet_format_data)
	Adds a Null Address Item to the common data packet format data. More...

EipStatus	AssembleForwardCloseResponse (EipUint16 connection_serial_number, EipUint16 originatior_vendor_id, EipUint32 originator_serial_number, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response, EipUint16 extended_error_code)

EipStatus	AssembleForwardOpenResponse (CipConnectionObject connection_object, CipMessageRouterResponse message_router_response, EipUint8 general_status, EipUint16 extended_status)
	Assembles the Forward Open Response. More...

EipStatus	CheckElectronicKeyData (EipUint8 key_format, void key_data, EipUint16 extended_status)
	Compare the electronic key received with a forward open request with the device's data. More...

CipConnectionObject *	CheckForExistingConnection (const CipConnectionObject *const connection_object)
	check if the data given in the connection object match with an already established connection More...

void	CheckForTimedOutConnectionsAndCloseTCPConnections (const CipConnectionObject *const connection_object, CloseSessionFunction CloseSessions)

void	CloseConnection (CipConnectionObject *RESTRICT connection_object)
	Close the given connection. More...

EipStatus	ConnectionManagerInit (EipUint16 unique_connection_id)
	Initialize the data of the connection manager object. More...

EipStatus	ForwardClose (CipInstance instance, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response, struct sockaddr originator_address, const int encapsulation_session)

EipStatus	ForwardOpen (CipInstance instance, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response, struct sockaddr originator_address, const int encapsulation_session)
	Check if resources for new connection available, generate ForwardOpen Reply message. More...

CipConnectionObject *	GetConnectedObject (const EipUint32 connection_id)
	Get a connected object dependent on requested ConnectionID. More...

CipConnectionObject *	GetConnectedOutputAssembly (const EipUint32 output_assembly_id)

CipUint	GetConnectionId (void)
	Generate a new connection Id utilizing the Incarnation Id as described in the EIP specs. More...

ConnectionManagementHandling *	GetConnectionManagementEntry (const EipUint32 class_id)

EipStatus	GetConnectionOwner (CipInstance instance, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response, struct sockaddr originator_address, const int encapsulation_session)

unsigned int	GetPaddedLogicalPath (const EipUint8 **logical_path_segment)
	gets the padded logical path TODO: enhance documentation More...

EipStatus	HandleNonNullMatchingForwardOpenRequest (CipConnectionObject connection_object, CipInstance instance, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response)
	Handles a Non Null Matching Forward Open Request. More...

EipStatus	HandleNonNullNonMatchingForwardOpenRequest (CipConnectionObject connection_object, CipInstance instance, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response)
	Handles a Non Null Non Matching Forward Open Request. More...

EipStatus	HandleNullMatchingForwardOpenRequest (CipConnectionObject connection_object, CipInstance instance, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response)
	Handles a Null Matching Forward Open request. More...

EipStatus	HandleNullNonMatchingForwardOpenRequest (CipConnectionObject connection_object, CipInstance instance, CipMessageRouterRequest message_router_request, CipMessageRouterResponse message_router_response)
	Handles a Null Non Matching Forward Open Request. More...

EipStatus	HandleReceivedConnectedData (const EipUint8 const data, int data_length, struct sockaddr_in from_address)
	Notify the connection manager that data for a connection has been received. More...

void	InitializeConnectionManager (CipClass *class)

void	InitializeConnectionManagerData (void)

EipBool8	IsConnectedOutputAssembly (const EipUint32 instance_number)

EipStatus	ManageConnections (MilliSeconds elapsed_time)
	Check if any of the connection timers (TransmissionTrigger or WatchdogTimeout) have timed out. More...

EipUint8	ParseConnectionPath (CipConnectionObject connection_object, CipMessageRouterRequest message_router_request, EipUint16 *extended_error)
	Parse the connection path of a forward open request. More...

void	RemoveFromActiveConnections (CipConnectionObject *const connection_object)
	Removes connection from the list of active connections. More...

EipStatus	TriggerConnections (unsigned int output_assembly, unsigned int input_assembly)
	Trigger the production of an application triggered connection. More...

Variables
DoublyLinkedList	connection_list

EipUint16	device_type_

ConnectionManagementHandling	g_connection_management_list [2+OPENER_CIP_NUM_APPLICATION_SPECIFIC_CONNECTABLE_OBJECTS]

CipConnectionObject	g_dummy_connection_object

EipUint32	g_incarnation_id
	Holds the connection ID's "incarnation ID" in the upper 16 bits. More...

const size_t	g_kForwardOpenHeaderLength = 36

EipUint16	product_code_

CipRevision	revision_

EipUint16	vendor_id_

Typedef Documentation

typedef EipStatus(* HandleForwardOpenRequestFunction)(CipConnectionObject *connection_object, CipInstance *instance, CipMessageRouterRequest *message_router_request, CipMessageRouterResponse *message_router_response)

Function prototype for all Forward Open handle functions.

Definition at line 306 of file cipconnectionmanager.c.

Function Documentation

void AddNewActiveConnection ( const CipConnectionObject *const connection_object )

Insert the given connection object to the list of currently active and managed connections.

By adding a connection to the active connection list the connection manager will perform the supervision and handle the timing (e.g., timeout, production inhibit, etc).

Parameters

connection_object pointer to the connection object to be added.

Definition at line 1406 of file cipconnectionmanager.c.

References ConnectionObjectSetState(), DoublyLinkedListInsertAtHead(), and kConnectionObjectStateEstablished.

Referenced by EstablishClass3Connection(), and EstablishIoConnection().

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void AddNullAddressItem ( CipCommonPacketFormatData * common_data_packet_format_data )

Adds a Null Address Item to the common data packet format data.

Parameters

common_data_packet_format_data The CPF data packet where the Null Address Item shall be added

Definition at line 846 of file cipconnectionmanager.c.

References CipCommonPacketFormatData::address_item, CipCommonPacketFormatData::data_item, kCipItemIdNullAddress, kCipItemIdUnconnectedDataItem, AddressItem::length, AddressItem::type_id, and DataItem::type_id.

Referenced by AssembleForwardCloseResponse(), and AssembleForwardOpenResponse().

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EipStatus AssembleForwardCloseResponse	(	EipUint16	connection_serial_number,
		EipUint16	originatior_vendor_id,
		EipUint32	originator_serial_number,
		CipMessageRouterRequest *	message_router_request,
		CipMessageRouterResponse *	message_router_response,
		EipUint16	extended_error_code
	)

Definition at line 872 of file cipconnectionmanager.c.

References AddDintToMessage(), AddIntToMessage(), CipMessageRouterResponse::additional_status, AddNullAddressItem(), CipMessageRouterRequest::data, CipMessageRouterResponse::data, CipCommonPacketFormatData::data_item, CipMessageRouterResponse::data_length, g_common_packet_format_data_item, CipMessageRouterResponse::general_status, CipCommonPacketFormatData::item_count, kCipErrorConnectionFailure, kCipErrorPrivilegeViolation, kCipErrorSuccess, kCipItemIdUnconnectedDataItem, kConnectionManagerExtendedStatusCodeSuccess, kConnectionManagerExtendedStatusWrongCloser, kEipStatusOkSend, CipMessageRouterResponse::reply_service, CipMessageRouterRequest::service, CipMessageRouterResponse::size_of_additional_status, and DataItem::type_id.

Referenced by ForwardClose().

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EipStatus AssembleForwardOpenResponse	(	CipConnectionObject *	connection_object,
		CipMessageRouterResponse *	message_router_response,
		EipUint8	general_status,
		EipUint16	extended_status
	)

Assembles the Forward Open Response.

Parameters

connection_object	pointer to connection Object
message_router_response	pointer to message router response
general_status	the general status of the response
extended_status	extended status in the case of an error otherwise 0

Returns: status kEipStatusOk .. no reply need to be sent back kEipStatusOkSend .. need to send reply kEipStatusError .. error

Definition at line 740 of file cipconnectionmanager.c.

References AddDintToMessage(), AddIntToMessage(), CipMessageRouterResponse::additional_status, AddNullAddressItem(), CipCommonPacketFormatData::address_info_item, cip_connection_object::cip_consumed_connection_id, cip_connection_object::cip_produced_connection_id, cip_connection_object::connection_serial_number, ConnectionObjectSetState(), CipMessageRouterResponse::data, CipCommonPacketFormatData::data_item, CipMessageRouterResponse::data_length, g_common_packet_format_data_item, CipMessageRouterResponse::general_status, CipCommonPacketFormatData::item_count, kCipErrorNotEnoughData, kCipErrorSuccess, kCipErrorTooMuchData, kCipItemIdUnconnectedDataItem, kConnectionManagerExtendedStatusCodeErrorInvalidOToTConnectionSize, kConnectionManagerExtendedStatusCodeErrorInvalidTToOConnectionSize, kConnectionObjectStateNonExistent, kEipStatusOkSend, kForwardOpen, cip_connection_object::o_to_t_requested_packet_interval, OPENER_TRACE_INFO, cip_connection_object::originator_serial_number, cip_connection_object::originator_vendor_id, CipMessageRouterResponse::reply_service, CipMessageRouterResponse::size_of_additional_status, cip_connection_object::t_to_o_requested_packet_interval, DataItem::type_id, and SocketAddressInfoItem::type_id.

Referenced by ForwardOpen(), HandleNonNullMatchingForwardOpenRequest(), HandleNonNullNonMatchingForwardOpenRequest(), HandleNullMatchingForwardOpenRequest(), and HandleNullNonMatchingForwardOpenRequest().

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EipStatus CheckElectronicKeyData	(	EipUint8	key_format,
		void *	key_data,
		EipUint16 *	extended_status
	)

Compare the electronic key received with a forward open request with the device's data.

Parameters

key_format	format identifier given in the forward open request
key_data	pointer to the electronic key data received in the forward open request
extended_status	the extended error code in case an error happened

Returns

general status on the establishment

EIP_OK ... on success
On an error the general status code to be put into the response

Definition at line 972 of file cipconnectionmanager.c.

References device_type_, ElectronicKeyFormat4GetDeviceType(), ElectronicKeyFormat4GetMajorRevision(), ElectronicKeyFormat4GetMajorRevisionCompatibility(), ElectronicKeyFormat4GetMinorRevision(), ElectronicKeyFormat4GetProductCode(), ElectronicKeyFormat4GetVendorId(), kConnectionManagerExtendedStatusCodeErrorDeviceTypeError, kConnectionManagerExtendedStatusCodeErrorInvalidSegmentTypeInPath, kConnectionManagerExtendedStatusCodeErrorRevisionMismatch, kConnectionManagerExtendedStatusCodeErrorVendorIdOrProductcodeError, kConnectionManagerExtendedStatusCodeSuccess, kEipStatusError, kEipStatusOk, CipRevision::major_revision, CipRevision::minor_revision, product_code_, and vendor_id_.

Referenced by ParseConnectionPath().

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CipConnectionObject * CheckForExistingConnection ( const CipConnectionObject *const connection_object )

check if the data given in the connection object match with an already established connection

The comparison is done according to the definitions in the CIP specification Section 3-5.5.2: The following elements have to be equal: Vendor ID, Connection Serial Number, Originator Serial Number

Parameters

connection_object connection object containing the comparison elements from the forward open request

Returns

NULL if no equal established connection exists
pointer to the equal connection object

Definition at line 954 of file cipconnectionmanager.c.

References ConnectionObjectGetState(), doubly_linked_list_node::data, EqualConnectionTriad(), DoublyLinkedList::first, kConnectionObjectStateEstablished, and doubly_linked_list_node::next.

Referenced by ForwardOpen().

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void CheckForTimedOutConnectionsAndCloseTCPConnections	(	const CipConnectionObject *const	connection_object,
		CloseSessionFunction	CloseSessions
	)

Definition at line 1506 of file cipconnectionmanager.c.

References ConnectionObjectEqualOriginator(), ConnectionObjectGetState(), doubly_linked_list_node::data, DoublyLinkedList::first, kConnectionObjectStateTimedOut, and doubly_linked_list_node::next.

Referenced by Class3ConnectionTimeoutHandler(), and HandleIoConnectionTimeOut().

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void CloseConnection ( CipConnectionObject *RESTRICT connection_object )

Close the given connection.

This function will take the data form the connection and correctly closes the connection (e.g., open sockets)

Parameters

connection_object pointer to the connection object structure to be closed

Definition at line 1385 of file cipconnectionmanager.c.

References CloseUdpSocket(), ConnectionObjectGetTransportClassTriggerTransportClass(), ConnectionObjectInitializeEmpty(), kConnectionObjectTransportClassTriggerTransportClass3, kUdpCommuncationDirectionConsuming, kUdpCommuncationDirectionProducing, and RemoveFromActiveConnections().

Referenced by Class3ConnectionTimeoutHandler(), and EstablishClass3Connection().

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EipStatus ConnectionManagerInit ( EipUint16 unique_connection_id )

Initialize the data of the connection manager object.

Parameters

unique_connection_id A unique connection id

Returns: kEipStatusOk if successful, otherwise kEipStatusError

Definition at line 207 of file cipconnectionmanager.c.

References AddConnectableObject(), CreateCipClass(), EstablishClass3Connection(), EstablishIoConnection(), ForwardClose(), ForwardOpen(), g_incarnation_id, GetAttributeAll(), GetAttributeSingle(), GetConnectionOwner(), InitializeConnectionManager(), InitializeConnectionManagerData(), InsertService(), kEipStatusError, kEipStatusOk, kForwardClose, kForwardOpen, kGetAttributeAll, kGetAttributeSingle, and kGetConnectionOwner.

Referenced by CipStackInit().

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EipStatus ForwardClose	(	CipInstance *	instance,
		CipMessageRouterRequest *	message_router_request,
		CipMessageRouterResponse *	message_router_response,
		struct sockaddr *	originator_address,
		const int	encapsulation_session
	)

Definition at line 560 of file cipconnectionmanager.c.

References CipCommonPacketFormatData::address_info_item, AssembleForwardCloseResponse(), cip_connection_object::connection_close_function, cip_connection_object::connection_serial_number, ConnectionObjectGetState(), doubly_linked_list_node::data, CipMessageRouterRequest::data, DoublyLinkedList::first, g_common_packet_format_data_item, GetDintFromMessage(), GetIntFromMessage(), kConnectionManagerExtendedStatusCodeErrorConnectionTargetConnectionNotFound, kConnectionManagerExtendedStatusCodeSuccess, kConnectionManagerExtendedStatusWrongCloser, kConnectionObjectStateEstablished, kConnectionObjectStateTimedOut, doubly_linked_list_node::next, OPENER_ASSERT, OPENER_TRACE_INFO, cip_connection_object::originator_address, cip_connection_object::originator_serial_number, cip_connection_object::originator_vendor_id, and SocketAddressInfoItem::type_id.

Referenced by ConnectionManagerInit().

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EipStatus ForwardOpen	(	CipInstance *	instance,
		CipMessageRouterRequest *	message_router_request,
		CipMessageRouterResponse *	message_router_response,
		struct sockaddr *	originator_address,
		const int	encapsulation_session
	)

Check if resources for new connection available, generate ForwardOpen Reply message.

Forward Open four cases Non-Null/Not matching - open a connection Non-Null/Matching - error Null/Not matching - ping a device/configure Null/Matching - reconfigure

Null connection - both O->T and T->O connection parameter field are null Non-Null connection - one or both O->T and T->O connection parameter field are not null Matching - Connection Triad matches an existing connection (Connection Serial Number, Originator Vendor ID and Originator Serial Number)

Parameters

instance	pointer to CIP object instance
message_router_request	pointer to Message Router Request.
message_router_response	pointer to Message Router Response.
originator_address	address struct of the originator as received
encapsulation_session	associated encapsulation session of the explicit message

Returns: >0 .. success, 0 .. no reply to send back -1 .. error

Definition at line 492 of file cipconnectionmanager.c.

References AssembleForwardOpenResponse(), cip_connection_object::associated_encapsulation_session, CheckForExistingConnection(), ConnectionObjectGetOToTConnectionType(), ConnectionObjectGetTToOConnectionType(), ConnectionObjectInitializeFromMessage(), CipMessageRouterRequest::data, kCipErrorConnectionFailure, kConnectionManagerExtendedStatusCodeErrorInvalidOToTConnectionType, kConnectionManagerExtendedStatusCodeErrorInvalidTToOConnectionType, kConnectionObjectConnectionTypeInvalid, kConnectionObjectConnectionTypeNull, OPENER_TRACE_INFO, and cip_connection_object::originator_address.

Referenced by ConnectionManagerInit().

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CipConnectionObject* GetConnectedObject ( const EipUint32 connection_id )

Get a connected object dependent on requested ConnectionID.

Parameters

connection_id Connection ID of the Connection Object to get

Returns: pointer to connected Object NULL .. connection not present in device

Definition at line 920 of file cipconnectionmanager.c.

References ConnectionObjectGetCipConsumedConnectionID(), ConnectionObjectGetState(), doubly_linked_list_node::data, DoublyLinkedList::first, kConnectionObjectStateEstablished, and doubly_linked_list_node::next.

Referenced by HandleReceivedConnectedData(), and NotifyConnectedCommonPacketFormat().

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CipConnectionObject* GetConnectedOutputAssembly ( const EipUint32 output_assembly_id )

Get a connection object for a given output assembly.

Parameters

output_assembly_id requested output assembly of requested connection

Returns: pointer to connected Object 0 .. connection not present in device

Definition at line 935 of file cipconnectionmanager.c.

References ConnectionObjectGetInstanceType(), ConnectionObjectGetState(), doubly_linked_list_node::data, DoublyLinkedList::first, kConnectionObjectInstanceTypeIOExclusiveOwner, kConnectionObjectStateEstablished, kConnectionObjectStateTimedOut, and doubly_linked_list_node::next.

Referenced by GetExclusiveOwnerConnection().

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CipUint GetConnectionId ( void )

Generate a new connection Id utilizing the Incarnation Id as described in the EIP specs.

A unique connectionID is formed from the boot-time-specified "incarnation ID" and the per-new-connection-incremented connection number/counter.

Returns: new connection id

Definition at line 177 of file cipconnectionmanager.c.

References g_incarnation_id.

Referenced by ConnectionObjectGeneralConfiguration().

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ConnectionManagementHandling * GetConnectionManagementEntry ( const EipUint32 class_id )

Definition at line 1465 of file cipconnectionmanager.c.

Referenced by HandleNonNullNonMatchingForwardOpenRequest().

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EipStatus GetConnectionOwner	(	CipInstance *	instance,
		CipMessageRouterRequest *	message_router_request,
		CipMessageRouterResponse *	message_router_response,
		struct sockaddr *	originator_address,
		const int	encapsulation_session
	)

Definition at line 636 of file cipconnectionmanager.c.

References kEipStatusOk.

Referenced by ConnectionManagerInit().

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unsigned int GetPaddedLogicalPath ( const EipUint8 ** logical_path_segment )

gets the padded logical path TODO: enhance documentation

Parameters

logical_path_segment TheLogical Path Segment

Returns: The padded logical path

Definition at line 155 of file cipconnectionmanager.c.

References OPENER_TRACE_ERR.

EipStatus HandleNonNullMatchingForwardOpenRequest	(	CipConnectionObject *	connection_object,
		CipInstance *	instance,
		CipMessageRouterRequest *	message_router_request,
		CipMessageRouterResponse *	message_router_response
	)

Handles a Non Null Matching Forward Open Request.

Non-Null, Matching request - Return General Status = kCipErrorConnectionFailure, Extended Status = kConnectionManagerExtendedStatusCodeErrorConnectionInUseOrDuplicateForwardOpen

Definition at line 375 of file cipconnectionmanager.c.

References AssembleForwardOpenResponse(), kCipErrorConnectionFailure, kConnectionManagerExtendedStatusCodeErrorConnectionInUseOrDuplicateForwardOpen, and OPENER_TRACE_INFO.

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EipStatus HandleNonNullNonMatchingForwardOpenRequest	(	CipConnectionObject *	connection_object,
		CipInstance *	instance,
		CipMessageRouterRequest *	message_router_request,
		CipMessageRouterResponse *	message_router_response
	)

Handles a Non Null Non Matching Forward Open Request.

Non-Null, Non-Matching request - Establish a new connection

Definition at line 399 of file cipconnectionmanager.c.

References AssembleForwardOpenResponse(), connection_path_epath::class_id, cip_connection_object::configuration_path, ConnectionObjectGetTransportClassTriggerProductionTrigger(), doubly_linked_list_node::data, DoublyLinkedList::first, GetConnectionManagementEntry(), kCipErrorConnectionFailure, kCipErrorSuccess, kConnectionManagerExtendedStatusCodeErrorTransportClassAndTriggerCombinationNotSupported, kConnectionManagerExtendedStatusCodeInconsistentApplicationPathCombo, kConnectionManagerExtendedStatusCodeSuccess, kConnectionObjectTransportClassTriggerProductionTriggerInvalid, kEipStatusError, kEipStatusOk, ConnectionManagementHandling::open_connection_function, OPENER_TRACE_INFO, and ParseConnectionPath().

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EipStatus HandleNullMatchingForwardOpenRequest	(	CipConnectionObject *	connection_object,
		CipInstance *	instance,
		CipMessageRouterRequest *	message_router_request,
		CipMessageRouterResponse *	message_router_response
	)

Handles a Null Matching Forward Open request.

Either reconfigure a target device’s application, or return General Status kCipErrorConnectionFailure and Extended Status kConnectionManagerExtendedStatusCodeNullForwardOpenNotSupported

Definition at line 350 of file cipconnectionmanager.c.

References AssembleForwardOpenResponse(), kCipErrorConnectionFailure, kConnectionManagerExtendedStatusCodeNullForwardOpenNotSupported, and OPENER_TRACE_INFO.

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EipStatus HandleNullNonMatchingForwardOpenRequest	(	CipConnectionObject *	connection_object,
		CipInstance *	instance,
		CipMessageRouterRequest *	message_router_request,
		CipMessageRouterResponse *	message_router_response
	)

Handles a Null Non Matching Forward Open Request.

Null, Non-Matching - Either ping device, or configure a device’s application, or return General Status kCipErrorConnectionFailure and Extended Status kConnectionManagerExtendedStatusCodeNullForwardOpenNotSupported

Definition at line 324 of file cipconnectionmanager.c.

References AssembleForwardOpenResponse(), kCipErrorConnectionFailure, kConnectionManagerExtendedStatusCodeNullForwardOpenNotSupported, and OPENER_TRACE_INFO.

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void InitializeConnectionManager ( CipClass * class )

Definition at line 183 of file cipconnectionmanager.c.

References cip_instance::cip_class, cip_class::class_instance, cip_class::highest_attribute_number, InsertAttribute(), kCipUint, kGetableSingle, kGetableSingleAndAll, and kNotSetOrGetable.

Referenced by ConnectionManagerInit().

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void InitializeConnectionManagerData ( void )

Definition at line 1528 of file cipconnectionmanager.c.

References InitializeClass3ConnectionData(), and InitializeIoConnectionData().

Referenced by ConnectionManagerInit().

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EipBool8 IsConnectedOutputAssembly ( const EipUint32 instance_number )

Definition at line 1424 of file cipconnectionmanager.c.

References ConnectionObjectIsTypeIOConnection(), cip_connection_object::consumed_path, doubly_linked_list_node::data, DoublyLinkedList::first, connection_path_epath::instance_id, and doubly_linked_list_node::next.

Referenced by SetAssemblyAttributeSingle().

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EipUint8 ParseConnectionPath	(	CipConnectionObject *	connection_object,
		CipMessageRouterRequest *	message_router_request,
		EipUint16 *	extended_error
	)

Parse the connection path of a forward open request.

This function will take the connection object and the received data stream and parse the connection path.

Parameters

connection_object	pointer to the connection object structure for which the connection should be established
message_router_request	pointer to the received request structure. The position of the data stream pointer has to be at the connection length entry
extended_error	the extended error code in case an error happened

Returns

general status on the establishment