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RASENTRY info  Overview  Group

The RASENTRY structure describes a phone-book entry. The RasSetEntryProperties and RasGetEntryProperties functions use this structure to set and retrieve the properties of a phone-book entry.

typedef struct tagRASENTRY {

  DWORD      dwSize;

  DWORD      dwfOptions;

  //

  // Location/phone number.

  //

  DWORD      dwCountryID;

  DWORD      dwCountryCode;

  TCHAR      szAreaCode[ RAS_MaxAreaCode + 1 ];

  TCHAR      szLocalPhoneNumber[ RAS_MaxPhoneNumber + 1 ];

  DWORD      dwAlternateOffset;

  //

  // PPP/Ip

  //

  RASIPADDR  ipaddr;

  RASIPADDR  ipaddrDns;

  RASIPADDR  ipaddrDnsAlt;

  RASIPADDR  ipaddrWins;

  RASIPADDR  ipaddrWinsAlt;

  //

  // Framing

  //

  DWORD      dwFrameSize;

  DWORD      dwfNetProtocols;

  DWORD      dwFramingProtocol;

  //

  // Scripting

  //

  TCHAR      szScript[ MAX_PATH ];

  //

  // AutoDial

  //

  TCHAR       szAutodialDll[ MAX_PATH ];

  TCHAR       szAutodialFunc[ MAX_PATH ];

  //

  // Device

  //

  TCHAR      szDeviceType[ RAS_MaxDeviceType + 1 ];

  TCHAR      szDeviceName[ RAS_MaxDeviceName + 1 ];

  //

  // X.25

  //

  TCHAR      szX25PadType[ RAS_MaxPadType + 1 ];

  TCHAR      szX25Address[ RAS_MaxX25Address + 1 ];

  TCHAR      szX25Facilities[ RAS_MaxFacilities + 1 ];

  TCHAR      szX25UserData[ RAS_MaxUserData + 1 ];

  DWORD      dwChannels;

  //

  // Reserved

  //

  DWORD       dwReserved1;

  DWORD       dwReserved2;

#if (WINVER >= 0x401)

  //

  // Multilink

  //

  DWORD       dwSubEntries;

  DWORD       dwDialMode;

  DWORD       dwDialExtraPercent;

  DWORD       dwDialExtraSampleSeconds;

  DWORD       dwHangUpExtraPercent;

  DWORD       dwHangUpExtraSampleSeconds;

  //

  // Idle timeout

  //

  DWORD       dwIdleDisconnectSeconds;

#endif

} RASENTRY;

 

Members

dwSize
Specifies the size, in bytes, of the RASENTRY structure. Before calling RasSetEntryProperties or RasGetEntryProperties, set dwSize to sizeof(RASENTRY) to identify the version of the structure.
dwfOptions
A set of bit flags that specify connection options. You can set one or more of the following flags.

Flag

Description

RASEO_UseCountryAndAreaCodes

If this flag is set, the dwCountryID, dwCountryCode, and szAreaCode members are used to construct the phone number. If this flag is not set, these members are ignored.

This flag corresponds to the Use Country and Area Codes check box in the Phone dialog box.

RASEO_SpecificIpAddr

If this flag is set, RAS tries to use the IP address specified by ipaddr as the IP address for the dial-up connection. If this flag is not set, the value of the ipaddr member is ignored.

Setting the RASEO_SpecificIpAddr flag corresponds to selecting the Specify an IP Address setting in the TCP/IP settings dialog box. Clearing the RASEO_SpecificIpAddr flag corresponds to selecting the Server Assigned IP Address setting in the TCP/IP settings dialog box.

Currently, an IP address set in the phone-book entry properties or retrieved from a server overrides the IP address set in the network control panel.

RASEO_SpecificNameServers

If this flag is set, RAS uses the ipaddrDns, ipaddrDnsAlt, ipaddrWins, and ipaddrWinsAlt members to specify the name server addresses for the dial-up connection. If this flag is not set, RAS ignores these members.

Setting the RASEO_SpecificNameServers flag corresponds to selecting the Specify Name Server Addresses setting in the TCP/IP Settings dialog box. Clearing the RASEO_SpecificNameServers flag corresponds to selecting the Server Assigned Name Server Addresses setting in the TCP/IP Settings dialog box.

RASEO_IpHeaderCompression

If this flag is set, RAS negotiates to use IP header compression on PPP connections.

If this flag is not set, IP header compression is not negotiated.

This flag corresponds to the Use IP Header Compression check box in the TCP/IP settings dialog box. It is generally advisable to set this flag because IP header compression significantly improves performance. The flag should be cleared only when connecting to a server that does not correctly negotiate IP header compression.

RASEO_RemoteDefaultGateway

If this flag is set, the default route for IP packets is through the dial-up adapter when the connection is active. If this flag is clear, the default route is not modified.

This flag corresponds to the Use Default Gateway on Remote Network check box in the TCP/IP settings dialog box.

RASEO_DisableLcpExtensions

If this flag is set, RAS disables the PPP LCP extensions defined in RFC 1570. This may be necessary to connect to certain older PPP implementations, but interferes with features such as server callback. Do not set this flag unless specifically required.

RASEO_TerminalBeforeDial

If this flag is set, RAS displays a terminal window for user input before dialing the connection.

RASEO_TerminalAfterDial

If this flag is set, RAS displays a terminal window for user input after dialing the connection.

Do not set this flag if a dial-up networking script is to be associated with the connection, because scripting has its own terminal implementation.

RASEO_ModemLights

This flag is currently ignored.

RASEO_SwCompression

If this flag is set, software compression is negotiated on the link. Setting this flag causes the PPP driver to attempt to negotiate CCP with the server. This flag should be set by default, but clearing it can reduce the negotiation period if the server does not support a compatible compression protocol.

RASEO_RequireEncryptedPw

If this flag is set, only secure password schemes can be used to authenticate the client with the server. This prevents the PPP driver from using the PAP plain-text authentication protocol to authenticate the client. The CHAP and SPAP authentication protocols are also supported. Clear this flag for increased interoperability, and set it for increased security.

This flag corresponds to the Require Encrypted Password check box in the Security dialog box. See also RASEO_RequireMsEncryptedPw.

RASEO_RequireMsEncryptedPw

If this flag is set, only Microsoft’s secure password schemes can be used to authenticate the client with the server. This prevents the PPP driver from using the PPP plain-text authentication protocol, MD5-CHAP, MS-CHAP, or SPAP. The flag should be cleared for maximum interoperability and should be set for maximum security. This flag takes precedence over RASEO_RequireEncryptedPw.

This flag corresponds to the Require Microsoft Encrypted Password check box in the Security dialog box. See also RASEO_RequireDataEncryption.

RASEO_RequireDataEncryption

If this flag is set, data encryption must be negotiated successfully or the connection should be dropped. This flag is ignored unless RASEO_RequireMsEncryptedPw is also set.

This flag corresponds to the Require Data Encryption check box in the Security dialog box.

RASEO_NetworkLogon

If this flag is set, RAS logs on to the network after the point-to-point connection is established.

This flag currently has no effect under Windows NT.

RASEO_UseLogonCredentials

If this flag is set, RAS uses the user name, password, and domain of the currently logged-on user when dialing this entry. This flag is ignored unless RASEO_RequireMsEncryptedPw is also set.

Note that this setting is ignored by the RasDial function, where specifying empty strings for the szUserName and szPassword members of the RASDIALPARAMS structure gives the same result.

This flag corresponds to the Use Current Username and Password check box in the Security dialog box.

RASEO_PromoteAlternates

This flag has an effect when alternate phone numbers are defined by the dwAlternateOffset member. If this flag is set, an alternate phone number that connects successfully becomes the primary phone number, and the current primary phone number is moved to the alternate list.

This flag corresponds to the check box in the Alternate Numbers dialog box.

RASEO_SecureLocalFiles

Windows NT only: If this flag is set, RAS checks for existing remote file system and remote printer bindings before making a connection with this entry. Typically, you set this flag on phone-book entries for public networks to remind users to break connections to their private network before connecting to a public network.

dwCountryID
Specifies the TAPI country identifier. Use the RasGetCountryInfo function to enumerate country identifiers. This member is ignored unless the dwfOptions member specifies the RASEO_UseCountryAndAreaCodes flag.
dwCountryCode
Specifies the country code portion of the phone number. The country code must correspond to the country identifier specified by dwCountryID. If dwCountryCode is zero, the country code is based on the country identifier specified by dwCountryID. This member is ignored unless dwfOptions specifies the RASEO_UseCountryAndAreaCodes flag.
szAreaCode
Specifies the area code as a null-terminated string. If the dialing location does not have an area code, specify an empty string (““). Do not include brackets or other delimiters in the area code string. (For example, “206” is a valid area code; “(206)” is not. This member is ignored unless the dwfOptions member specifies the RASEO_UseCountryAndAreaCodes flag.
szLocalPhoneNumber
Specifies a null-terminated string containing a telephone number. The way RAS uses this string depends on whether the dwfOptions member specifies the RASEO_UseCountryAndAreaCodes flag. If the flag is set, RAS combines szLocalPhoneNumber with the country and area codes specified by the dwCountryID, dwCountryCode , and szAreaCode members. If the flag is not set, RAS uses the szLocalPhoneNumber string as the entire phone number.
dwAlternateOffset
Specifies the offset, in bytes, from the beginning of the structure to a list of consecutive null-terminated strings. The last string is terminated by two consecutive null characters. The strings are alternate phone numbers that RAS dials in the order listed if the primary number (see szLocalPhoneNumber) fails to connect. The alternate phone number strings are ANSI or Unicode, depending on whether you use the ANSI or Unicode version of the structure.
ipaddr
Specifies the IP address to be used while this connection is active. This member is ignored unless dwfOptions specifies the RASEO_SpecificIpAddr flag.
ipaddrDns
Specifies the IP address of the DNS server to be used while this connection is active. This member is ignored unless dwfOptions specifies the RASEO_SpecificNameServers flag.
ipaddrDnsAlt
Specifies the IP address of a secondary or backup DNS server to be used while this connection is active. This member is ignored unless dwfOptions specifies the RASEO_SpecificNameServers flag.
ipaddrWins
Specifies the IP address of the WINS server to be used while this connection is active. This member is ignored unless dwfOptions specifies the RASEO_SpecificNameServers flag.
ipaddrWinsAlt
Specifies the IP address of a secondary WINS server to be used while this connection is active. This member is ignored unless dwfOptions specifies the RASEO_SpecificNameServers flag.
dwFrameSize
Specifies the network protocol frame size. The value should be either 1006 or 1500. This member is ignored unless dwFramingProtocol specifies the RASFP_Slip flag.
dwfNetProtocols
Specifies the network protocols to negotiate. This member can be a combination of the following flags.

Flag

Description

RASNP_NetBEUI

Negotiate the NetBEUI protocol.

RASNP_Ipx

Negotiate the IPX protocol.

RASNP_Ip

Negotiate the TCP/IP protocol.

dwFramingProtocol
Specifies the framing protocol used by the server. PPP is the emerging standard. SLIP is used mainly in UNIX environments. This member can be one of the following flags.

Flag

Description

RASFP_Ppp

Point-to-Point Protocol (PPP)

RASFP_Slip

Serial Line Internet Protocol (SLIP)

RASFP_Ras

Microsoft proprietary protocol implemented in Windows NT 3.1 and Windows for Workgroups 3.11

To use Compressed SLIP, set the RASFP_Slip flag and set the RASEO_IpHeaderCompression flag in the dwfOptions member.

szScript
Specifies a null-terminated string containing the name of the script file. The filename should be a full path.

Windows NT: To indicate a Windows NT SWITCH.INF script name, set the first character of the name to “[“.

szAutodialDll
Specifies a null-terminated string containing the full path and filename of the dynamic-link library (DLL) for the customized AutoDial handler. If szAutodialDll contains an empty string (““), RAS uses the default dialing user interface and the szAutodialFunc member is ignored.
szAutodialFunc
Specifies a null-terminated string containing the exported name of the RASADFunc function for the customized AutoDial handler. An AutoDial DLL must provide both ANSI and Unicode versions of the RASADFunc handler. However, do not include the “A” or “W” suffix in the name specified by szAutodialFunc.
szDeviceType
Specifies a null-terminated string indicating the RAS device type referenced by szDeviceName. This member can be one of the following string constants.

String

Description

RASDT_Modem

A modem accessed through a COM port.

RASDT_Isdn

An ISDN card with corresponding NDISWAN driver installed.

RASDT_X25

An X.25 card with corresponding NDISWAN driver installed.

szDeviceName
Contains a null-terminated string containing the name of a TAPI device to use with this phone-book entry. To enumerate all available RAS-capable devices, use the RasEnumDevices function.
szX25PadType
Contains a null-terminated string that identifies the X.25 PAD type. Set this member to ““ unless the entry should dial using an X.25 PAD.

Windows NT: Under Windows NT, the szX25PadType string maps to a section name in PAD.INF.

szX25Address
Contains a null-terminated string that identifies the X.25 address to connect to. Set this member to ““ unless the entry should dial using an X.25 PAD or native X.25 device.
szX25Facilities
Contains a null-terminated string that specifies the facilities to request from the X.25 host at connection. This member is ignored if szX25Address is an empty string (““).
szX25UserData
Contains a null-terminated string that specifies additional connection information supplied to the X.25 host at connection. This member is ignored if szX25Address is an empty string (““).

dwChannels;

dwReserved1
Reserved; must be zero.
dwReserved2
Reserved; must be zero.
dwSubEntries
Specifies the number of multilink subentries associated with this entry. When calling RasSetEntryProperties, set this member to zero. To add subentries to a phone-book entry, use the RasSetSubEntryProperties function.
dwDialMode
Indicates whether RAS should dial all of this entry’s multilink subentries when the entry is first connected. This member can be one of the following values.

Value

Meaning

RASEDM_DialAll

Dial all subentries initially.

RASEDM_DialAsNeeded

Adjust the number of subentries as bandwidth is needed. RAS uses the dwDialExtraPercent, dwDialExtraSampleSeconds, dwDialHangUpExtraPercent, and dwHangUpExtraSampleSeconds members to determine when to dial or disconnect a subentry.

dwDialExtraPercent
Specifies a percent of the total bandwidth available from the currently connected subentries. RAS dials an additional subentry when the total bandwidth used exceeds dwDialExtraPercent percent of the available bandwidth for at least dwDialExtraSampleSeconds seconds.

This member is ignored unless the dwDialMode member specifies the RASEDM_DialAsNeeded flag.

dwDialExtraSampleSeconds
Specifies the number of seconds that current bandwidth usage must exceed the threshold specified by dwDialExtraPercent before RAS dials an additional subentry.

This member is ignored unless the dwDialMode member specifies the RASEDM_DialAsNeeded flag.

dwHangUpExtraPercent
Specifies a percent of the total bandwidth available from the currently connected subentries. RAS terminates (hangs up) an existing subentry connection when total bandwidth used is less than dwHangUpExtraPercent percent of the available bandwidth for at least dwHangUpExtraSampleSeconds seconds.

This member is ignored unless the dwDialMode member specifies the RASEDM_DialAsNeeded flag.

dwHangUpExtraSampleSeconds
Specifies the number of seconds that current bandwidth usage must be less than the threshold specified by dwHangUpExtraPercent before RAS terminates an existing subentry connection.

This member is ignored unless the dwDialMode member specifies the RASEDM_DialAsNeeded flag.

dwIdleDisconnectSeconds
Specifies the number of seconds after which the connection is terminated due to inactivity. Note that unless the idle timeout is disabled, the entire connection is terminated if the connection is idle for the specified interval. This member can specify a number of seconds, or one of the following values.

Value

Meaning

RASIDS_Disabled

There is no idle timeout for this connection.

RASIDS_UseGlobalValue

Use the user preference value as the default.

See Also

RASADFunc, RasGetCountryInfo, RasSetEntryProperties, RasSetSubEntryProperties

See also:


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