#ifndef _PPTPD_H
#define _PPTPD_H

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <time.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/fcntl.h>
#include <errno.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <string.h>
#include <ctype.h>

#include "pptp-proto.h"

struct aval_ppp {
	struct aval_ppp *next;
	int index;
	char line[0];
};

struct ppp_struct {
	int fd;
	pid_t ppp_pid;
	struct ppp_struct * next;
	struct aval_ppp * cmdline;
	u_int16_t call_id; /* network order */
	u_int16_t peers_call_id; /* network order */
	char pptp_type;
#define PPTP_PNS	0
#define PPTP_PAC	1

	u_int16_t fcs16;
	char buf[PPPFRAME_MAX];
	char buf_flags;
#define PPP_BUF_ESCAPE		0x01
#define PPP_NOISE_TO_FLAG	0x02
	int buf_pos;

};

struct control_struct {
	struct control_struct ** control_chain;

	/* control connection */
	int ctrl_fd;
	time_t last_pong_time;
		/* control connection receiver data */
		char * ctrl_rcv_buf;
		u_int16_t ctrl_rcv_len;
		int ctrl_rcv_offset;
#define		CTRL_RCV_LEN0	-3
#define		CTRL_RCV_LEN1	-2
#define		CTRL_RCV_START	-1
	struct control_struct * next;
	
	/* data connection */
	int gre_fd;
	u_int32_t in_seq;	/* sequence number of received packet +1 */
	u_int32_t in_ack;	/* input accepted packet +1 */
	u_int32_t in_pack;	/* prev. input accepted packet +1 */
	u_int32_t out_seq;	/* last output packet */
	u_int32_t out_ack;	/* output packet accepted by peer */
	u_int32_t in_window_size;
	u_int32_t out_window_size;
	struct timeval gre_tv, gre_dtv;
	struct pptp_gre_header *in_window[MAX_GRE_WINDOW];
	struct pptp_gre_header *out_window[MAX_GRE_WINDOW];
		struct sockaddr_in addr_local;
		struct sockaddr_in addr_remote;

	/* ppp interfaces */
	struct ppp_struct * ppp;
};


#define ALLOC_PACKET(buf,what)	\
	if( ((buf)=malloc(sizeof(*(buf))))!=NULL ) {			\
		(buf)->header.length =  htons(sizeof(*(buf)));	\
		(buf)->header.pptp_type = htons(PPTP_CTRL_MESSAGE);\
		(buf)->header.magic = htonl(PPTP_MAGIC_COOKIE); \
		(buf)->header.ctrl_type = htons(what);	\
		(buf)->header.reserved0 = htons(RESERVED);	\
	}



/* GCC hack, (c) 2000 Milan Pikula <www@fornax.sk> */
#define NOTHING
#define LOG(FMT, PAR...) syslog(LOG_INFO, __FILE__ ":%d(" __FUNCTION__ "): " FMT, __LINE__ NOTHING, ## PAR)

/* time(x) <= time(y) */

#define TV_IS_MIN(X,Y) ((X).tv_sec <= (Y).tv_sec || ((X).tv_sec == (Y).tv_sec && (X).tv_usec <= (Y).tv_usec))
#define TV_MIN(X,Y) (TV_IS_MIN((X),(Y)) ? (X) : (Y))

#if 0
inline void tv_sub(stuct timeval * x, struct timeval * y) {
	if (x.tv_usec >= y.tv_usec)
		x.tv_usec -= y.tv_usec;
	else {
		x.tv_usec += 1000000 - y.tv_usec;
		x.tv_sec --;
	}
	x.tv_sec -= y.tv_sec;
	return x;
}
#endif

#define TV_SUB(X,Y) do { \
	(X).tv_sec -= (((X).tv_usec < (Y).tv_usec)?1:0) + (Y).tv_sec; \
	(X).tv_usec += (((X).tv_usec < (Y).tv_usec)?1000000:0) - (Y).tv_usec; \
} while (0)

#define TV_ADD(X,Y) do { \
	(X).tv_sec += (Y).tv_sec + ((Y).tv_usec+(X).tv_usec)/1000000; \
	(X).tv_usec = ((X).tv_usec + (Y).tv_usec)%1000000; \
} while (0)


#include "prototypes.h"

#endif /* _PPTPD_H */