pppd实现研究 二

3．

typedef struct fsm_callbacks
{
    void ( *resetci ) /* Reset our Configuration Information */
    __P ( ( fsm * ) );
    int ( *cilen ) /* Length of our Configuration Information */
    __P ( ( fsm * ) );
    void ( *addci ) /* Add our Configuration Information */
    __P ( ( fsm *, u_char *, int * ) );
    int ( *ackci ) /* ACK our Configuration Information */
    __P ( ( fsm *, u_char *, int ) );
    int ( *nakci ) /* NAK our Configuration Information */
    __P ( ( fsm *, u_char *, int ) );
    int ( *rejci ) /* Reject our Configuration Information */
    __P ( ( fsm *, u_char *, int ) );
    int ( *reqci ) /* Request peer's Configuration Information */
    __P ( ( fsm *, u_char *, int *, int ) );
    void ( *up ) /* Called when fsm reaches OPENED state */
    __P ( ( fsm * ) );
    void ( *down ) /* Called when fsm leaves OPENED state */
    __P ( ( fsm * ) );
    void ( *starting ) /* Called when we want the lower layer */
    __P ( ( fsm * ) );
    void ( *finished ) /* Called when we don't want the lower layer */
    __P ( ( fsm * ) );
    void ( *protreject ) /* Called when Protocol-Reject received */
    __P ( ( int ) );
    void ( *retransmit ) /* Retransmission is necessary */
    __P ( ( fsm * ) );
    int ( *extcode ) /* Called when unknown code received */
    __P ( ( fsm *, int, int, u_char *, int ) );
    char *proto_name; /* String name for protocol (for messages) */
} fsm_callbacks;

4．

/*
 * The state of options is described by an lcp_options structure.
 */
typedef struct lcp_options
{
    bool passive; /* Don't die if we don't get a response */
    bool silent; /* Wait for the other end to start first */
    bool restart; /* Restart vs. exit after close */
    bool neg_mru; /* Negotiate the MRU? */
    bool neg_asyncmap; /* Negotiate the async map? */
    bool neg_upap; /* Ask for UPAP authentication? */
    bool neg_chap; /* Ask for CHAP authentication? */
    bool neg_eap; /* Ask for EAP authentication? */
    bool neg_magicnumber; /* Ask for magic number? */
    bool neg_pcompression; /* HDLC Protocol Field Compression? */
    bool neg_accompression; /* HDLC Address/Control Field Compression? */
    bool neg_lqr; /* Negotiate use of Link Quality Reports */
    bool neg_cbcp; /* Negotiate use of CBCP */
    bool neg_mrru; /* negotiate multilink MRRU */
    bool neg_ssnhf; /* negotiate short sequence numbers */
    bool neg_endpoint; /* negotiate endpoint discriminator */
    int mru; /* Value of MRU */
    int mrru; /* Value of MRRU, and multilink enable */
    u_char chap_mdtype; /* which MD types (hashing algorithm) */
    u_int32_t asyncmap; /* Value of async map */
    u_int32_t magicnumber;
    int numloops; /* Number of loops during magic number neg. */
    u_int32_t lqr_period; /* Reporting period for LQR 1/100ths second */
    struct epdisc endpoint; /* endpoint discriminator */
} lcp_options;