ap/app/ppp-2.4.1/pppd/mppe.h

#ifndef __MPPE_INCLUDE__

typedef struct mppe_state {
    int    us_unit;	/* Interface unit number */
    u_char us_id;		/* Current id */
    u_char us_allowed;
    int    us_type;
    char   *us_number;    /* Telefone Number */
} mppe_state;


extern struct protent mppe_protent;

#define MPPE_CONFOPTION 18		/* p[0] */
#define MPPE_STATELESS  0x01		/* p[2] */
#define MPPE_40BIT	0x20		/* p[5] */
#define MPPE_128BIT	0x40		/* p[5] */

#define PPP_MPPE	0x00FD

#define MPPE_BIT_A	0x80
#define MPPE_BIT_B	0x40
#define MPPE_BIT_C	0x20
#define MPPE_BIT_D	0x10
#define MPPE_BIT_FLUSHED MPPE_BIT_A
#define MPPE_BIT_ENCRYPTED MPPE_BIT_D
#define MPPE_CCOUNT	0x0FFF

#define MPPE_40_SALT0	0xD1
#define MPPE_40_SALT1	0x26
#define MPPE_40_SALT2	0x9E

#define MPPE_MINLEN 4

#define MPPE_REQ    1
#define MPPE_RESP   2
#define MPPE_ACK    3

extern char mppe_master_send_key_40[8];
extern char mppe_master_send_key_128[16];
extern char mppe_master_recv_key_40[8];
extern char mppe_master_recv_key_128[16];
extern unsigned int mppe_allowed;

void mppe_gen_master_key __P((char *, int, unsigned char *));
void mppe_gen_master_key_v2 __P((char *, int, unsigned char *, int));

int setmppe_40(char **);
int setnomppe_40(char **);
int setmppe_128(char **);
int setnomppe_128(char **);
int setmppe_stateless(char **);
int setnomppe_stateless(char **);

#define __MPPE_INCLUDE__
#endif /* __MPPE_INCLUDE__ */