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Function xn_lcp_set_option

Sets or resets an LCP option as negotiable.

int xn_lcp_set_option(int iface_no, int host, int option, int turn_on);

Parameters

iface_no

Interface number returned by xn_attach.

host

Set negotiation flag for local or remote host (LOCAL_HOST or REMOTE_HOST).

option

Option to set or reset (LCP_MRU, LCP_ACCM, LCP_AUTHENT, LCP_PFC, LCP_ACFC, LCP_MAGIC).

turn_on

Turn option on if TRUE, otherwise, turn it off.

return value

Returns 0 if successful, otherwise SOCKET_ERROR. If an error occurred, call xn_getlasterror and xn_geterror_string to return the error value. Section Error Codes further describes each error.

Possible values for this function are:

This function establishes whether one of the following LCP options is negotiable if requested by the remote host: Maximum-Receive-Unit, Async-Control-Character-Map, Authentication-Type, Protocol-Field-Compression, Address-and-Control-Field-Compression, and Magic-Number.

Call this routine with host set to LOCAL_HOST and turn_on set to TRUE to accept the specified option if it is sent from the remote host in an LCP Configuration-NAK message. Call this routine with host set to REMOTE_HOST and turn_on set to FALSE to not accept the option if sent from the remote host in a Configuration-NAK message.

Call this routine with host set to REMOTE_HOST and turn_on set to TRUE to accept an LCP Configuration-Request for the option if it is sent from the remote. Call this routine with host set to REMOTE_HOST and turn_on set to FALSE to reject an LCP Configuration-Request for the option if it is sent from the remote host.

PPP

Function xn_lcp_open

Function xn_lcp_want_accm