IPInfo Class

Properties   Methods   Events   Configuration Settings   Errors  

The IPInfo class is used to resolve host names to host addresses and vice-versa using asynchronous DNS. The class provides access to other TCP/IP database functions as well.

Syntax

IPInfo

Remarks

The IPInfo class operates asynchronously. Requests are posted to the class by setting a property like HostName or HostAddress and then waiting for the RequestComplete event. The RequestId property identifies the request.

Up to 100 simultaneous requests can be queued at any moment. PendingRequests shows the number of pending requests, and may also be used to adjust the size of the queue (by dumping a number of the pending requests).

Property List

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The following is the full list of the properties of the class with short descriptions. Click on the links for further details.

AdapterBroadcastAddress	The broadcast address of the adapter.
AdapterCount	The number of adapters in the system.
AdapterDescription	The description of the adapter identified by AdapterIndex .
AdapterDeviceIndex	The system index of the adapter identified by AdapterIndex .
AdapterDHCPEnabled	Shows whether or not the adapter identified by AdapterIndex has DHCP Enabled.
AdapterDHCPServer	The DHCP server of the adapter identified by AdapterIndex .
AdapterDNSServers	The DNS server list for the adapter identified by AdapterIndex .
AdapterGateway	The default gateway of the adapter identified by AdapterIndex .
AdapterIndex	Sets the current adapter.
AdapterIPAddress	The IP address of the adapter identified by AdapterIndex .
AdapterIPv6Address	The IPv6 address of the adapter identified by AdapterIndex .
AdapterIPv6LinkLocalAddress	The IPv6 link local address of the adapter identified by AdapterIndex .
AdapterLeaseExpires	The expiration date and time of the lease obtained by the adapter identified by AdapterIndex .
AdapterLeaseObtained	The date and time of when the current lease was obtained by the adapter identified by AdapterIndex .
AdapterName	The name of the adapter identified by AdapterIndex .
AdapterOtherIPAddresses	Other IP addresses leased by the adapter specified by AdapterIndex , if any.
AdapterPhysicalAddress	The physical address of the adapter identified by AdapterIndex .
AdapterPrimaryWINSServer	The primary WINS server of the adapter identified by AdapterIndex .
AdapterSecondaryWINSServer	The secondary WINS server of the adapter identified by AdapterIndex .
AdapterStatus	Returns the current status of the adapter.
AdapterSubnetMask	The subnet of the adapter identified by AdapterIndex .
AdapterType	The type of adapter identified by AdapterIndex .
AdapterUsesWINS	Shows whether or not the adapter identified by AdapterIndex uses WINS.
AdapterZoneId	The zone Id of the adapter identified by AdapterIndex .
ARPProxy	Shows whether the local computer is acting as an ARP proxy.
DHCPScope	The DHCP Scope of the DHCP server.
DNSEnabled	Shows whether DNS is enabled on the local computer.
DNSServer	The address of the DNS Server.
DomainName	The current network domain on which the system resides.
HostAddress	An Internet Address in dotted format. When set, it initiates a search for the corresponding host name.
HostAliases	Other names corresponding to the host with the name HostName.
HostName	The Domain Name of an Internet host. When set, it initiates a search for the corresponding address(es).
LocalHost	The name of the local host.
NodeType	The type of node for the system.
OtherAddresses	Other addresses for the host identified by HostName (for multihomed hosts).
OtherDNSServers	Other DNS servers configured for the host machine.
PendingRequests	The number of requests awaiting completion.
RequestId	The handle of the last request.
RoutingEnabled	Shows whether routing is enabled on the local computer.
ServiceAliases	Other names by which the service specified by ServiceName / ServicePort is known.
ServiceName	A name for a service. When set, it initiates a search for the corresponding port number and protocol.
ServicePort	A port number for a service. When set, it initiates a search for the corresponding service name and protocol.
ServiceProtocol	The protocol of the service specified by ServiceName / ServicePort .

Method List

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The following is the full list of the methods of the class with short descriptions. Click on the links for further details.

Config	Sets or retrieves a configuration setting.
DHCPRelease	Releases the IP Address of the current adapter specified by AdapterIndex .
DHCPRenew	Renews the IP Address of the current adapter specified by AdapterIndex .
DisplayDNSCache	Displays cached DNS entries.
DoEvents	Processes events from the internal message queue.
FlushDNSCache	Flush the DNS cache.
GetMAC	Returns the MAC address of the network interface at IPAddress .
Reset	Resets the class, stopping all pending requests and refreshing network information.
ResolveAddress	Resolves an IP address.
ResolveName	Resolves a host name.

Event List

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The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.

DNSCacheEntry	Fires once for each cached DNS entry.
Error	Information about errors during data delivery.
RequestComplete	Fired after an asynchronous request completes.

Configuration Settings

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The following is a list of configuration settings for the class with short descriptions. Click on the links for further details.

AdapterDADState	Specifies the Duplicate Address Detection state of the IP address of the adapter specified by AdapterIndex.
AdapterIPv6DADState	Specifies the Duplicate Address Detection state of the IPv6 address of the adapter specified by AdapterIndex.
AdapterOtherDADStates	Specifies the Duplicate Address Detection states of the IP addresses leased by the adapter specified by AdapterIndex, if any.
ARPAddress	Specifies the IP Address of the interface to be used for the GetMAC method.
UseOldApi	If set the class will use the old API to get Adapter information.
BuildInfo	Information about the product's build.
CodePage	The system code page used for Unicode to Multibyte translations.
LicenseInfo	Information about the current license.
UseInternalSecurityAPI	Tells the class whether or not to use the system security libraries or an internal implementation.

AdapterBroadcastAddress Property (IPInfo Class)

The broadcast address of the adapter.

Syntax

QString GetAdapterBroadcastAddress();

Default Value

""

Remarks

This property contains the broadcast address of the adapter specified by AdapterIndex.

This property is read-only.

Data Type

String

AdapterCount Property (IPInfo Class)

The number of adapters in the system.

Syntax

int GetAdapterCount();

Default Value

0

Remarks

This property shows how many adapters are installed in the system. You can set the AdapterIndex from 0 to the AdapterCount, and then examine the Adapter properties such as AdapterDescription, AdapterName, and AdapterIPAddress to retrieve information about each adapter.

This property is read-only.

Data Type

Integer

AdapterDescription Property (IPInfo Class)

The description of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterDescription();

Default Value

""

Remarks

This property contains the description of the adapter identified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterDeviceIndex Property (IPInfo Class)

The system index of the adapter identified by AdapterIndex .

Syntax

int GetAdapterDeviceIndex();

Default Value

0

Remarks

This property contains the system index of the adapter identified by AdapterIndex, as returned by the system.

This property is read-only.

Data Type

Integer

AdapterDHCPEnabled Property (IPInfo Class)

Shows whether or not the adapter identified by AdapterIndex has DHCP Enabled.

Syntax

bool GetAdapterDHCPEnabled();

Default Value

false

Remarks

This property indicates whether or not the adapter identified by AdapterIndex has DHCP Enabled. Dynamic Host Configuration Protocol (DHCP) is used for automatically assigning IP Addresses on a network.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

Boolean

AdapterDHCPServer Property (IPInfo Class)

The DHCP server of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterDHCPServer();

Default Value

""

Remarks

This property contains the DHCP server of the adapter identified by AdapterIndex. Dynamic Host Configuration Protocol (DHCP) is used for automatically assigning IP Addresses on a network.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterDNSServers Property (IPInfo Class)

The DNS server list for the adapter identified by AdapterIndex .

Syntax

QString GetAdapterDNSServers();

Default Value

""

Remarks

This property contains a space separated list of DNS servers for the adapter specified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterGateway Property (IPInfo Class)

The default gateway of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterGateway();

Default Value

""

Remarks

This property contains the default gateway of the adapter identified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterIndex Property (IPInfo Class)

Sets the current adapter.

Syntax

int GetAdapterIndex();
int SetAdapterIndex(int iAdapterIndex);

Default Value

0

Remarks

When this property is set, the class asks the system for information on the adapter with an index of AdapterIndex. If the system has information, the Adapter properties will be populated with the data returned.

AdapterCount is the number of adapters located in the system.

Data Type

Integer

AdapterIPAddress Property (IPInfo Class)

The IP address of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterIPAddress();

Default Value

""

Remarks

This property contains the IP address of the adapter identified by AdapterIndex, as returned by the system.

This property is read-only.

Data Type

String

AdapterIPv6Address Property (IPInfo Class)

The IPv6 address of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterIPv6Address();

Default Value

""

Remarks

The IPv6 address of the adapter identified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

NOTE: This functionality is only available on XP or newer OS versions.

This property is read-only.

Data Type

String

AdapterIPv6LinkLocalAddress Property (IPInfo Class)

The IPv6 link local address of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterIPv6LinkLocalAddress();

Default Value

""

Remarks

The IPv6 link local address of the adapter identified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterLeaseExpires Property (IPInfo Class)

The expiration date and time of the lease obtained by the adapter identified by AdapterIndex .

Syntax

QString GetAdapterLeaseExpires();

Default Value

""

Remarks

This property contains the expiration date and time of the lease obtained by the adapter identified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterLeaseObtained Property (IPInfo Class)

The date and time of when the current lease was obtained by the adapter identified by AdapterIndex .

Syntax

QString GetAdapterLeaseObtained();

Default Value

""

Remarks

This property contains the date and time of when the current lease was obtained by the adapter identified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterName Property (IPInfo Class)

The name of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterName();

Default Value

""

Remarks

This property contains the name of the adapter identified by AdapterIndex, as returned by the system.

This property is read-only.

Data Type

String

AdapterOtherIPAddresses Property (IPInfo Class)

Other IP addresses leased by the adapter specified by AdapterIndex , if any.

Syntax

QString GetAdapterOtherIPAddresses();

Default Value

""

Remarks

This property contains a space separated list of any other IP addresses leased by the adapter specified by AdapterIndex, if any.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterPhysicalAddress Property (IPInfo Class)

The physical address of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterPhysicalAddress();

Default Value

""

Remarks

This property contains the physical address of the adapter identified by AdapterIndex, as returned from the system.

This property is not supported in MacOS or iOS.

This property is read-only.

Data Type

String

AdapterPrimaryWINSServer Property (IPInfo Class)

The primary WINS server of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterPrimaryWINSServer();

Default Value

""

Remarks

This property contains the primary WINS server of the adapter identified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterSecondaryWINSServer Property (IPInfo Class)

The secondary WINS server of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterSecondaryWINSServer();

Default Value

""

Remarks

This property contains the secondary WINS server of the adapter identified by AdapterIndex, as returned by the system.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

AdapterStatus Property (IPInfo Class)

Returns the current status of the adapter.

Syntax

QString GetAdapterStatus();

Default Value

""

Remarks

This proprety holds the current status of the adapter specified by AdapterIndex.

Possible values are as follows:

• "Up"
• "Down"
• "Testing"
• "Unknown"
• "Dormant"
• "NotPresent"
• "LowerLayerDown"

This property is not applicable when UseOldApi is true.

This property is read-only.

Data Type

String

AdapterSubnetMask Property (IPInfo Class)

The subnet of the adapter identified by AdapterIndex .

Syntax

QString GetAdapterSubnetMask();

Default Value

""

Remarks

This property contains the subnet of the adapter identified by AdapterIndex, as returned by the system.

This property is read-only.

Data Type

String

AdapterType Property (IPInfo Class)

The type of adapter identified by AdapterIndex .

Syntax

QString GetAdapterType();

Default Value

""

Remarks

This property contains the type of adapter identified by AdapterIndex, as returned by the system.

Possible values include:

OTHER	Other
ETHERNET	Ethernet
TOKENRING	Token Ring
FDDI	Fiber Distributed Data Interface
PPP	Point-to-Point Protocol
LOOPBACK	Loopback
SLIP	Serial Line Internet Protocol

Possible values include (Unix OS):

UP	Interface is up
BROADCAST	Broadcast address valid
DEBUG	Turn on debugging
LOOPBACK	Interface is a loopback device
POINTOPOINT	Interface is a point-to-point link
RUNNING	Resources allocated
NOARP	No address resolution protocol
PROMISC	Receive all packets
NOTRAILERS	Avoid use of trailers
ALLMULTI	Receive all multicast packets
MASTER	Master of a load balancer
SLAVE	Slave of a load balancer
MULTICAST	Supports multicast
PORTSEL	Can set media type
AUTOMEDIA	Auto media select active
DYNAMIC	Dialup device with dynamic addresses

This property is read-only.

Data Type

String

AdapterUsesWINS Property (IPInfo Class)

Shows whether or not the adapter identified by AdapterIndex uses WINS.

Syntax

bool GetAdapterUsesWINS();

Default Value

false

Remarks

This property indicates whether or not the adapter identified by AdapterIndex uses WINS. Windows Internet Name Service (WINS) is a name resolution service which is used to resolve Windows network hostnames to IP addresses.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

Boolean

AdapterZoneId Property (IPInfo Class)

The zone Id of the adapter identified by AdapterIndex .

Syntax

int GetAdapterZoneId();

Default Value

0

Remarks

Also known as a scope Id, the zone Id specifies the ipv6 zone to which the current adapter belongs. The values of the zone Id are defined relative to the sending host. When using an IPv6 enabled XP operating system, the zone Id of the sender MUST be appended after a "%" to the desired ipv6 address. This is an integer value on windows systems.

NOTE: This functionality is only available in Windows.

NOTE: This functionality is only available on XP or newer OS versions.

This property is read-only.

Data Type

Integer

ARPProxy Property (IPInfo Class)

Shows whether the local computer is acting as an ARP proxy.

Syntax

bool GetARPProxy();

Default Value

false

Remarks

This property indicates whether the local computer is acting as an ARP proxy. If true, the local computer will act as an ARP proxy, and will respond to ARP requests with its own hardware address.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

Boolean

DHCPScope Property (IPInfo Class)

The DHCP Scope of the DHCP server.

Syntax

QString GetDHCPScope();

Default Value

""

Remarks

This property contains a range of IP addresses which the Dynamic Host Configuration Protocol (DHCP) server can lease to clients.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

DNSEnabled Property (IPInfo Class)

Shows whether DNS is enabled on the local computer.

Syntax

bool GetDNSEnabled();

Default Value

false

Remarks

This property indicates whether DNS is enabled on the local computer. If true, DNS is enabled, and name resolution will be available.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

Boolean

DNSServer Property (IPInfo Class)

The address of the DNS Server.

Syntax

QString GetDNSServer();

Default Value

""

Remarks

The class attempts to find the default DNS server for the machine where it is installed, and provide it in this property.

If the class cannot determine the default DNS server address, this property value will be an empty string.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

DomainName Property (IPInfo Class)

The current network domain on which the system resides.

Syntax

QString GetDomainName();

Default Value

""

Remarks

This property contains the domain name to which the system is joined.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

HostAddress Property (IPInfo Class)

An Internet Address in dotted format. When set, it initiates a search for the corresponding host name.

Syntax

QString GetHostAddress();
int SetHostAddress(QString qsHostAddress);

Default Value

""

Remarks

This property contains the IP address (in internet dotted format aaa.bbb.ccc.ddd) of the host whose domain name is specified by HostName

If HostAddress is set to an IP address, a search is initiated for the corresponding host names(s).

The RequestComplete event is fired when the search is complete. The RequestId property identifies the pending request.

Example (Resolve an Address)

IPInfoControl.HostAddress = "10.0.1.10" While IPInfoControl.PendingRequests > 0 IPInfoControl.DoEvents() End While ResolvedName = IPInfoControl.HostName

Data Type

String

HostAliases Property (IPInfo Class)

Other names corresponding to the host with the name HostName.

Syntax

QString GetHostAliases();

Default Value

""

Remarks

This property contains a list of alternate names for the host specified by HostName and HostAddress separated by spaces.

This property is read-only.

Data Type

String

HostName Property (IPInfo Class)

The Domain Name of an Internet host. When set, it initiates a search for the corresponding address(es).

Syntax

QString GetHostName();
int SetHostName(QString qsHostName);

Default Value

""

Remarks

This property contains the domain name of the host whose IP address is specified by HostAddress.

If this property is set to a domain name, a search is initiated for the corresponding host address(s).

The RequestComplete event is fired when the search is complete. The RequestId property identifies the pending request.

Example (Resolve a Name)

IPInfoControl.HostName = "MyHostName" While IPInfoControl.PendingRequests > 0 IPInfoControl.DoEvents() End While ResolvedAddress = IPInfoControl.HostAddress

Data Type

String

LocalHost Property (IPInfo Class)

The name of the local host.

Syntax

QString GetLocalHost();

Default Value

""

Remarks

This property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, it will contain the value of that address.

This property is read-only.

Data Type

String

NodeType Property (IPInfo Class)

The type of node for the system.

Syntax

QString GetNodeType();

Default Value

""

Remarks

This property contains the type of node for the system. Possible values include 'BROADCAST', 'PEERTOPEER', 'MIXED', 'HYBRID'.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

OtherAddresses Property (IPInfo Class)

Other addresses for the host identified by HostName (for multihomed hosts).

Syntax

QString GetOtherAddresses();

Default Value

""

Remarks

This property contains a list of alternate addresses for the host specified by HostName and HostAddress separated by spaces. Most hosts have only one IP interface. This property is useful when querying multihomed hosts (hosts with more than one interface).

This property is read-only.

Data Type

String

OtherDNSServers Property (IPInfo Class)

Other DNS servers configured for the host machine.

Syntax

QString GetOtherDNSServers();

Default Value

""

Remarks

This property contains a space-separated list of DNS servers configured for the host machine. Note that the primary server is provided in the DNSServer property.

NOTE: This functionality is only available in Windows.

This property is read-only and not available at design time.

Data Type

String

PendingRequests Property (IPInfo Class)

The number of requests awaiting completion.

Syntax

int GetPendingRequests();
int SetPendingRequests(int iPendingRequests);

Default Value

0

Remarks

This property serves two functions: it shows the number of requests that are pending completion, but it can also be used to adjust the size of the queue by dumping part of or all the pending requests.

To cancel all the pending requests at any moment, simply set PendingRequests to 0.

NOTE: This functionality is only available in Windows.

Data Type

Integer

RequestId Property (IPInfo Class)

The handle of the last request.

Syntax

int GetRequestId();

Default Value

0

Remarks

This property contains the handle of the last request.

This handle can be later used to identify the request when the RequestComplete event is fired.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

Integer

RoutingEnabled Property (IPInfo Class)

Shows whether routing is enabled on the local computer.

Syntax

bool GetRoutingEnabled();

Default Value

false

Remarks

This property indicates whether routing is enabled on the local computer.

NOTE: This functionality is only available in Windows.

This property is read-only and not available at design time.

Data Type

Boolean

ServiceAliases Property (IPInfo Class)

Other names by which the service specified by ServiceName / ServicePort is known.

Syntax

QString GetServiceAliases();

Default Value

""

Remarks

This property contains a list of alternate service names separated by spaces. In most cases, this list is empty.

NOTE: This functionality is only available in Windows.

This property is read-only.

Data Type

String

ServiceName Property (IPInfo Class)

A name for a service. When set, it initiates a search for the corresponding port number and protocol.

Syntax

QString GetServiceName();
int SetServiceName(QString qsServiceName);

Default Value

""

Remarks

This property contains the name of the specified service located at ServicePort.

If this property is set to a service name, a search is initiated for the corresponding ServicePort and other information related to the service (if any).

The RequestComplete event is fired when the search is complete. RequestId identifies the pending request.

NOTE: This functionality is only available in Windows.

Data Type

String

ServicePort Property (IPInfo Class)

A port number for a service. When set, it initiates a search for the corresponding service name and protocol.

Syntax

int GetServicePort();
int SetServicePort(int iServicePort);

Default Value

0

Remarks

This property contains the port number for the service specified by ServiceName.

If this property is set to a port number, a search is initiated for the ServiceName and other information related to the service (if any).

The RequestComplete event is fired when the search is complete. RequestId identifies the pending request.

NOTE: This functionality is only available in Windows.

Data Type

Integer

ServiceProtocol Property (IPInfo Class)

The protocol of the service specified by ServiceName / ServicePort .

Syntax

QString GetServiceProtocol();
int SetServiceProtocol(QString qsServiceProtocol);

Default Value

""

Remarks

This property contains the protocol for the service specified by ServiceName.

Setting this property to a particular protocol name (for example 'udp' or 'tcp') will force a search for a service for that protocol only. If this property is set to "" (empty string) then the first entry for the service will be returned and this property will be set to the corresponding protocol.

NOTE: This functionality is only available in Windows.

Data Type

String

Config Method (IPInfo Class)

Sets or retrieves a configuration setting.

Syntax

QString Config(const QString& qsConfigurationString);

Remarks

Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Error Handling

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

DHCPRelease Method (IPInfo Class)

Releases the IP Address of the current adapter specified by AdapterIndex .

Syntax

int DHCPRelease();

Remarks

This method releases the IP Address of the current adapter specified by AdapterIndex. If AdapterDHCPEnabled is true, the lease of the IP Address assigned to the current adapter specified by AdapterIndex is released.

NOTE: This functionality is only available in Windows.

Error Handling

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

DHCPRenew Method (IPInfo Class)

Renews the IP Address of the current adapter specified by AdapterIndex .

Syntax

int DHCPRenew();

Remarks

This method renews the IP Address of the current adapter specified by AdapterIndex. If AdapterDHCPEnabled is true, the lease of the IP Address assigned to the current adapter specified by AdapterIndex is renewed.

NOTE: This functionality is only available in Windows.

Error Handling

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

DisplayDNSCache Method (IPInfo Class)

Displays cached DNS entries.

Syntax

QString DisplayDNSCache();

Remarks

This method displays details of the locally cached DNS records.

This method will return a string with information about the DNS cache. In addition the DNSCacheEntry event will fire once per cached entry.

The returned value is in the format:

docs.google.com
----------------------------------------
Record Name . . . . . : docs.google.com
Record Type . . . . . : 1(A)
Time To Live  . . . . : 48
Data Length . . . . . : 4
Section . . . . . . . : Answer
A Record  . . . . . . : 216.58.218.238

NOTE: This functionality is only available in Windows.

Error Handling

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

DoEvents Method (IPInfo Class)

Processes events from the internal message queue.

Syntax

int DoEvents();

Remarks

When DoEvents is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

Error Handling

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

FlushDNSCache Method (IPInfo Class)

Flush the DNS cache.

Syntax

bool FlushDNSCache();

Remarks

This method flushes the DNS cache for the system.

NOTE: This functionality is only available in Windows.

Error Handling

This method returns a Boolean value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

GetMAC Method (IPInfo Class)

Returns the MAC address of the network interface at IPAddress .

Syntax

QString GetMAC(const QString& qsIPAddress);

Remarks

This method returns the unique Media Access Control (MAC) address of the network interface at IPAddress.

NOTE: This functionality is only available in Windows.

Error Handling

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

Reset Method (IPInfo Class)

Resets the class, stopping all pending requests and refreshing network information.

Syntax

int Reset();

Remarks

This method resets the class, stopping all pending requests and refreshing network information. If the network configuration has changed, call this method to retrieve the latest information.

Error Handling

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

ResolveAddress Method (IPInfo Class)

Resolves an IP address.

Syntax

QString ResolveAddress(const QString& qsHostAddress);

Remarks

This method resolves the IP Address HostAddress and sets HostName to the name of the host corresponding to HostAddress.

Calling this method is equivalent to setting the HostAddress property to HostAddress.

Example (Resolve an Address)

IPInfoControl.ResolveAddress ("10.0.1.10") While (IPInfoControl.PendingRequests > 0) IPInfoControl.DoEvents Wend Debug.Print IPInfoControl.HostName

Error Handling

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

ResolveName Method (IPInfo Class)

Resolves a host name.

Syntax

QString ResolveName(const QString& qsHostName);

Remarks

This method resolves the host name HostName and sets HostAddress to the IP Address of the host corresponding to HostName.

Calling this method is equivalent to setting the HostName property to HostName.

Example (Resolve a Name)

IPInfoControl.ResolveName ("MyHostName") While (IPInfoControl.PendingRequests > 0) IPInfoControl.DoEvents Wend Debug.Print IPInfoControl.HostAddress

Error Handling

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

DNSCacheEntry Event (IPInfo Class)

Fires once for each cached DNS entry.

Syntax

class IPInfoDNSCacheEntryEventParams {
public:
  const QString &RecordName();

  int RecordType();

  int TimeToLive();

  int DataLength();

  const QString &Section();

  const QString &RecordValue();

  const QString &RecordInfo();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};

// To handle, connect one or more slots to this signal.
void DNSCacheEntry(IPInfoDNSCacheEntryEventParams *e);

// Or, subclass IPInfo and override this emitter function.
virtual int FireDNSCacheEntry(IPInfoDNSCacheEntryEventParams *e) {...}

Remarks

This event fires once for each entry in the local DNS cache when DisplayDNSCache is called.

RecordName is the host name to which the record applies.

RecordType is the type of response. For instance 1 is an A record.

TimeToLive is the time in seconds after which the cached entry expires.

DataLength is the length of the data in bytes. For instance if the RecordType is A and an IPv4 address is cached DataLength would be 4. CNAME and PTR records will contain the length of the address in memory where the value is held.

Section is the section of the DNS response from which the record is taken. Most commonly this is the "Answer" section.

RecordValue is the actual value that is cached. For instance this may be an IP address for A records.

RecordInfo is a text representation of the other parameters. This is suitable for use in a log file, or to display.

Error Event (IPInfo Class)

Information about errors during data delivery.

Syntax

class IPInfoErrorEventParams {
public:
  int ErrorCode();

  const QString &Description();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};

// To handle, connect one or more slots to this signal.
void Error(IPInfoErrorEventParams *e);

// Or, subclass IPInfo and override this emitter function.
virtual int FireError(IPInfoErrorEventParams *e) {...}

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

RequestComplete Event (IPInfo Class)

Fired after an asynchronous request completes.

Syntax

class IPInfoRequestCompleteEventParams {
public:
  int RequestId();

  int StatusCode();

  const QString &Description();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};

// To handle, connect one or more slots to this signal.
void RequestComplete(IPInfoRequestCompleteEventParams *e);

// Or, subclass IPInfo and override this emitter function.
virtual int FireRequestComplete(IPInfoRequestCompleteEventParams *e) {...}

Remarks

The RequestId parameter specifies the request that just completed. The class properties that relate to this request are completed with the returned values. (For example, in the case of domain name resolution, HostName, HostAddress, HostAliases, and OtherAddresses are set to the resolved values.)

If the request completed normally, StatusCode is 0, and Description is "OK". If not, StatusCode has the error code returned by the system. Description contains a description of this code.

Please refer to the Error Codes section for more information.

NOTE: This functionality is only available in Windows.

Configuration Settings (IPInfo Class)

The class accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the Config method.

IPInfo Configuration Settings

AdapterDADState:   Specifies the Duplicate Address Detection state of the IP address of the adapter specified by AdapterIndex. The possible values are as follows: (empty) - Indicates the class was unable to get any information. Invalid Tentative Duplicate Deprecated Preferred

AdapterIPv6DADState:   Specifies the Duplicate Address Detection state of the IPv6 address of the adapter specified by AdapterIndex. The possible values are as follows: (empty) - Indicates the class was unable to get any information. Invalid Tentative Duplicate Deprecated Preferred

AdapterOtherDADStates:   Specifies the Duplicate Address Detection states of the IP addresses leased by the adapter specified by AdapterIndex, if any. The possible values are as follows: (empty) - Indicates the class was unable to get any information. Invalid Tentative Duplicate Deprecated Preferred

ARPAddress:   Specifies the IP Address of the interface to be used for the GetMAC method. By default, when GetMAC is called the class will attempt the address resolution from the first adapter listed by the system. In multi-homed machines it may be necessary to specify the IP address of the interface to be used as the source of the address resolution request. Set this setting to the local IP address of the adapter to be used when making this request.

UseOldApi:   If set the class will use the old API to get Adapter information. The class uses new system calls to obtain IPv6 as well as IPv4 adapter information. Some of the new System calls are not supported on the XP Windows operating system however. Set this config to true to use the old System calls when retrieving adapter information. NOTE: This functionality is only available in Windows. NOTE: This setting should only be needed when using the XP operating system.

Base Configuration Settings

BuildInfo:   Information about the product's build. When queried, this setting will return a string containing information about the product's build.

CodePage:   The system code page used for Unicode to Multibyte translations. The default code page is Unicode UTF-8 (65001). The following is a list of valid code page identifiers: Identifier Name 037 IBM EBCDIC - U.S./Canada 437 OEM - United States 500 IBM EBCDIC - International 708 Arabic - ASMO 708 709 Arabic - ASMO 449+, BCON V4 710 Arabic - Transparent Arabic 720 Arabic - Transparent ASMO 737 OEM - Greek (formerly 437G) 775 OEM - Baltic 850 OEM - Multilingual Latin I 852 OEM - Latin II 855 OEM - Cyrillic (primarily Russian) 857 OEM - Turkish 858 OEM - Multilingual Latin I + Euro symbol 860 OEM - Portuguese 861 OEM - Icelandic 862 OEM - Hebrew 863 OEM - Canadian-French 864 OEM - Arabic 865 OEM - Nordic 866 OEM - Russian 869 OEM - Modern Greek 870 IBM EBCDIC - Multilingual/ROECE (Latin-2) 874 ANSI/OEM - Thai (same as 28605, ISO 8859-15) 875 IBM EBCDIC - Modern Greek 932 ANSI/OEM - Japanese, Shift-JIS 936 ANSI/OEM - Simplified Chinese (PRC, Singapore) 949 ANSI/OEM - Korean (Unified Hangul Code) 950 ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC) 1026 IBM EBCDIC - Turkish (Latin-5) 1047 IBM EBCDIC - Latin 1/Open System 1140 IBM EBCDIC - U.S./Canada (037 + Euro symbol) 1141 IBM EBCDIC - Germany (20273 + Euro symbol) 1142 IBM EBCDIC - Denmark/Norway (20277 + Euro symbol) 1143 IBM EBCDIC - Finland/Sweden (20278 + Euro symbol) 1144 IBM EBCDIC - Italy (20280 + Euro symbol) 1145 IBM EBCDIC - Latin America/Spain (20284 + Euro symbol) 1146 IBM EBCDIC - United Kingdom (20285 + Euro symbol) 1147 IBM EBCDIC - France (20297 + Euro symbol) 1148 IBM EBCDIC - International (500 + Euro symbol) 1149 IBM EBCDIC - Icelandic (20871 + Euro symbol) 1200 Unicode UCS-2 Little-Endian (BMP of ISO 10646) 1201 Unicode UCS-2 Big-Endian 1250 ANSI - Central European 1251 ANSI - Cyrillic 1252 ANSI - Latin I 1253 ANSI - Greek 1254 ANSI - Turkish 1255 ANSI - Hebrew 1256 ANSI - Arabic 1257 ANSI - Baltic 1258 ANSI/OEM - Vietnamese 1361 Korean (Johab) 10000 MAC - Roman 10001 MAC - Japanese 10002 MAC - Traditional Chinese (Big5) 10003 MAC - Korean 10004 MAC - Arabic 10005 MAC - Hebrew 10006 MAC - Greek I 10007 MAC - Cyrillic 10008 MAC - Simplified Chinese (GB 2312) 10010 MAC - Romania 10017 MAC - Ukraine 10021 MAC - Thai 10029 MAC - Latin II 10079 MAC - Icelandic 10081 MAC - Turkish 10082 MAC - Croatia 12000 Unicode UCS-4 Little-Endian 12001 Unicode UCS-4 Big-Endian 20000 CNS - Taiwan 20001 TCA - Taiwan 20002 Eten - Taiwan 20003 IBM5550 - Taiwan 20004 TeleText - Taiwan 20005 Wang - Taiwan 20105 IA5 IRV International Alphabet No. 5 (7-bit) 20106 IA5 German (7-bit) 20107 IA5 Swedish (7-bit) 20108 IA5 Norwegian (7-bit) 20127 US-ASCII (7-bit) 20261 T.61 20269 ISO 6937 Non-Spacing Accent 20273 IBM EBCDIC - Germany 20277 IBM EBCDIC - Denmark/Norway 20278 IBM EBCDIC - Finland/Sweden 20280 IBM EBCDIC - Italy 20284 IBM EBCDIC - Latin America/Spain 20285 IBM EBCDIC - United Kingdom 20290 IBM EBCDIC - Japanese Katakana Extended 20297 IBM EBCDIC - France 20420 IBM EBCDIC - Arabic 20423 IBM EBCDIC - Greek 20424 IBM EBCDIC - Hebrew 20833 IBM EBCDIC - Korean Extended 20838 IBM EBCDIC - Thai 20866 Russian - KOI8-R 20871 IBM EBCDIC - Icelandic 20880 IBM EBCDIC - Cyrillic (Russian) 20905 IBM EBCDIC - Turkish 20924 IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol) 20932 JIS X 0208-1990 & 0121-1990 20936 Simplified Chinese (GB2312) 21025 IBM EBCDIC - Cyrillic (Serbian, Bulgarian) 21027 Extended Alpha Lowercase 21866 Ukrainian (KOI8-U) 28591 ISO 8859-1 Latin I 28592 ISO 8859-2 Central Europe 28593 ISO 8859-3 Latin 3 28594 ISO 8859-4 Baltic 28595 ISO 8859-5 Cyrillic 28596 ISO 8859-6 Arabic 28597 ISO 8859-7 Greek 28598 ISO 8859-8 Hebrew 28599 ISO 8859-9 Latin 5 28605 ISO 8859-15 Latin 9 29001 Europa 3 38598 ISO 8859-8 Hebrew 50220 ISO 2022 Japanese with no halfwidth Katakana 50221 ISO 2022 Japanese with halfwidth Katakana 50222 ISO 2022 Japanese JIS X 0201-1989 50225 ISO 2022 Korean 50227 ISO 2022 Simplified Chinese 50229 ISO 2022 Traditional Chinese 50930 Japanese (Katakana) Extended 50931 US/Canada and Japanese 50933 Korean Extended and Korean 50935 Simplified Chinese Extended and Simplified Chinese 50936 Simplified Chinese 50937 US/Canada and Traditional Chinese 50939 Japanese (Latin) Extended and Japanese 51932 EUC - Japanese 51936 EUC - Simplified Chinese 51949 EUC - Korean 51950 EUC - Traditional Chinese 52936 HZ-GB2312 Simplified Chinese 54936 Windows XP: GB18030 Simplified Chinese (4 Byte) 57002 ISCII Devanagari 57003 ISCII Bengali 57004 ISCII Tamil 57005 ISCII Telugu 57006 ISCII Assamese 57007 ISCII Oriya 57008 ISCII Kannada 57009 ISCII Malayalam 57010 ISCII Gujarati 57011 ISCII Punjabi 65000 Unicode UTF-7 65001 Unicode UTF-8 The following is a list of valid code page identifiers for Mac OS only: Identifier Name 1 ASCII 2 NEXTSTEP 3 JapaneseEUC 4 UTF8 5 ISOLatin1 6 Symbol 7 NonLossyASCII 8 ShiftJIS 9 ISOLatin2 10 Unicode 11 WindowsCP1251 12 WindowsCP1252 13 WindowsCP1253 14 WindowsCP1254 15 WindowsCP1250 21 ISO2022JP 30 MacOSRoman 10 UTF16String 0x90000100 UTF16BigEndian 0x94000100 UTF16LittleEndian 0x8c000100 UTF32String 0x98000100 UTF32BigEndian 0x9c000100 UTF32LittleEndian 65536 Proprietary

LicenseInfo:   Information about the current license. When queried, this setting will return a string containing information about the license this instance of a class is using. It will return the following information: Product: The product the license is for. Product Key: The key the license was generated from. License Source: Where the license was found (e.g., RuntimeLicense, License File). License Type: The type of license installed (e.g., Royalty Free, Single Server). Last Valid Build: The last valid build number for which the license will work.

UseInternalSecurityAPI:   Tells the class whether or not to use the system security libraries or an internal implementation. By default the class will use the system security libraries to perform cryptographic functions where applicable. Setting this to true tells the class to use the internal implementation instead of using the system's security API.

Trappable Errors (IPInfo Class)

IPInfo Errors

	131   Request queue is full.
	132   Message for unknown request.
	134   Invalid address string.
	310   Adapter information is unavailable.

SSL Errors

	270   Cannot load specified security library.
	271   Cannot open certificate store.
	272   Cannot find specified certificate.
	273   Cannot acquire security credentials.
	274   Cannot find certificate chain.
	275   Cannot verify certificate chain.
	276   Error during handshake.
	280   Error verifying certificate.
	281   Could not find client certificate.
	282   Could not find server certificate.
	283   Error encrypting data.
	284   Error decrypting data.

TCP/IP Errors

	10004   [10004] Interrupted system call.
	10009   [10009] Bad file number.
	10013   [10013] Access denied.
	10014   [10014] Bad address.
	10022   [10022] Invalid argument.
	10024   [10024] Too many open files.
	10035   [10035] Operation would block.
	10036   [10036] Operation now in progress.
	10037   [10037] Operation already in progress.
	10038   [10038] Socket operation on non-socket.
	10039   [10039] Destination address required.
	10040   [10040] Message too long.
	10041   [10041] Protocol wrong type for socket.
	10042   [10042] Bad protocol option.
	10043   [10043] Protocol not supported.
	10044   [10044] Socket type not supported.
	10045   [10045] Operation not supported on socket.
	10046   [10046] Protocol family not supported.
	10047   [10047] Address family not supported by protocol family.
	10048   [10048] Address already in use.
	10049   [10049] Can't assign requested address.
	10050   [10050] Network is down.
	10051   [10051] Network is unreachable.
	10052   [10052] Net dropped connection or reset.
	10053   [10053] Software caused connection abort.
	10054   [10054] Connection reset by peer.
	10055   [10055] No buffer space available.
	10056   [10056] Socket is already connected.
	10057   [10057] Socket is not connected.
	10058   [10058] Can't send after socket shutdown.
	10059   [10059] Too many references, can't splice.
	10060   [10060] Connection timed out.
	10061   [10061] Connection refused.
	10062   [10062] Too many levels of symbolic links.
	10063   [10063] File name too long.
	10064   [10064] Host is down.
	10065   [10065] No route to host.
	10066   [10066] Directory not empty
	10067   [10067] Too many processes.
	10068   [10068] Too many users.
	10069   [10069] Disc Quota Exceeded.
	10070   [10070] Stale NFS file handle.
	10071   [10071] Too many levels of remote in path.
	10091   [10091] Network subsystem is unavailable.
	10092   [10092] WINSOCK DLL Version out of range.
	10093   [10093] Winsock not loaded yet.
	11001   [11001] Host not found.
	11002   [11002] Non-authoritative 'Host not found' (try again or check DNS setup).
	11003   [11003] Non-recoverable errors: FORMERR, REFUSED, NOTIMP.
	11004   [11004] Valid name, no data record (check DNS setup).