2.2.1.2.71 PPP_LCP_INFO

The PPP_LCP_INFO structure contains information that describes the results of a PPP Link Control Protocol (LCP) negotiation.

 typedef struct _PPP_LCP_INFO {
   DWORD dwError;
   DWORD dwAuthenticationProtocol;
   DWORD dwAuthenticationData;
   DWORD dwRemoteAuthenticationProtocol;
   DWORD dwRemoteAuthenticationData;
   DWORD dwTerminateReason;
   DWORD dwRemoteTerminateReason;
   DWORD dwOptions;
   DWORD dwRemoteOptions;
   DWORD dwEapTypeId;
   DWORD dwRemoteEapTypeId;
 } PPP_LCP_INFO;

dwError: Specifies the error that occurred if the negotiation were unsuccessful. Zero (0) indicates success.

dwAuthenticationProtocol: Specifies the authentication protocol used to authenticate the local computer. The following table shows the possible values for this member.<49>

Value	Meaning
0x00000000	Either no authentication was negotiated by the local end, or no LCP settings are applicable for the connection (for example, an IKEv2 connection).
PPP_LCP_PAP 0x0000C023	Password Authentication Protocol (PAP)
PPP_LCP_SPAP 0x0000C027	Shiva Password Authentication Protocol (SPAP)
PPP_LCP_CHAP 0x0000C223	Challenge-Handshake Authentication Protocol (CHAP)
PPP_LCP_EAP 0x0000C227	Extensible Authentication Protocol (EAP)

dwAuthenticationData: Specifies additional information about the authentication protocol specified by the dwAuthenticationProtocol member. The following table shows the possible values for this member.<50>

Value	Meaning
0x00000000	No additional authentication data applies.
PPP_LCP_CHAP_MD5 0x00000005	MD5 CHAP
PPP_LCP_CHAP_MS 0x00000080	Microsoft CHAP
PPP_LCP_CHAP_MSV2 0x00000081	Microsoft CHAP version 2

dwRemoteAuthenticationProtocol: Specifies the authentication protocol used to authenticate the remote computer. See the dwAuthenticationProtocol member for a list of possible values. The following table shows the possible values for this member.<51>

Value	Meaning
0x00000000	Either no authentication was negotiated by the remote end, or no LCP settings are applicable for the connection (for example, an IKEv2 connection).
PPP_LCP_PAP 0x0000C023	Password Authentication Protocol (PAP)
PPP_LCP_SPAP 0x0000C027	Shiva Password Authentication Protocol (SPAP)
PPP_LCP_CHAP 0x0000C223	Challenge-Handshake Authentication Protocol (CHAP)
PPP_LCP_EAP 0x0000C227	Extensible Authentication Protocol (EAP)

dwRemoteAuthenticationData: Specifies additional information about the authentication protocol specified by dwRemoteAuthenticationProtocol. See the dwAuthenticationData member for a list of possible values.

dwTerminateReason: Specifies the reason the connection was terminated by the local computer. This member always has a value of zero (0).

dwRemoteTerminateReason: Specifies the reason the connection was terminated by the remote computer. This member always has a value of zero (0).

dwOptions: Specifies information about the LCP options in use by the local computer. This member is a combination of the following flags.<52>

Value	Meaning
0x00000000	No flag is set.
PPP_LCP_MULTILINK_FRAMING 0x00000001	The connection is using multilink.
PPP_LCP_PFC 0x00000002	Protocol Field Compression (see [RFC1172]).
PPP_LCP_ACFC 0x00000004	Address and Control Field Compression (see [RFC1172]).
PPP_LCP_SSHF 0x00000008	Short Sequence Number Header Format (see [RFC1990]).
PPP_LCP_DES_56 0x00000010	Data Encryption Standard (DES) 56-bit encryption.
PPP_LCP_3_DES 0x00000020	Triple DES encryption.
PPP_LCP_AES_128 0x00000040	128-bit AES encryption.
PPP_LCP_AES_256 0x00000080	256-bit AES encryption.
PPP_LCP_AES_192 0x00000100	192-bit AES encryption.
PPP_LCP_GCM_AES_128 0x00000200	128-bit AES encryption GCM (Galois Counter Mode) mode of operation (see [RFC4106]).
PPP_LCP_GCM_AES_192 0x00000400	192-bit AES encryption GCM (Galois Counter Mode) mode of operation (see [RFC4106]).
PPP_LCP_GCM_AES_256 0x00000800	256-bit AES encryption GCM (Galois Counter Mode) mode of operation (see [RFC4106]).

dwRemoteOptions: Specifies information about the LCP options in use by the remote computer. See dwOptions member for a list of possible values.

dwEapTypeId: Specifies the type identifier of the EAP used to authenticate the local computer. MUST be one of the values specified in Method Types of [IANA-EAP]. The value of this member is valid only if dwAuthenticationProtocol is PPP_LCP_EAP.

dwRemoteEapTypeId: This field MUST be zero (0) and has no significance.