116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/* $NetBSD: recvbuff.h,v 1.1.1.1 2000/03/29 12:38:48 simonb Exp $ */
|
|
|
|
#if !defined __recvbuff_h
|
|
#define __recvbuff_h
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include "ntp.h"
|
|
#include "ntp_fp.h"
|
|
#include "ntp_types.h"
|
|
|
|
/*
|
|
* recvbuf memory management
|
|
*/
|
|
#define RECV_INIT 10 /* 10 buffers initially */
|
|
#define RECV_LOWAT 3 /* when we're down to three buffers get more */
|
|
#define RECV_INC 5 /* get 5 more at a time */
|
|
#define RECV_TOOMANY 40 /* this is way too many buffers */
|
|
|
|
#if defined HAVE_IO_COMPLETION_PORT
|
|
# include "ntp_iocompletionport.h"
|
|
#include "ntp_timer.h"
|
|
|
|
# define RECV_BLOCK_IO() EnterCriticalSection(&RecvCritSection)
|
|
# define RECV_UNBLOCK_IO() LeaveCriticalSection(&RecvCritSection)
|
|
|
|
/* Return the event which is set when items are added to the full list
|
|
*/
|
|
extern HANDLE get_recv_buff_event P((void));
|
|
#else
|
|
# define RECV_BLOCK_IO()
|
|
# define RECV_UNBLOCK_IO()
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Format of a recvbuf. These are used by the asynchronous receive
|
|
* routine to store incoming packets and related information.
|
|
*/
|
|
|
|
/*
|
|
* the maximum length NTP packet is a full length NTP control message with
|
|
* the maximum length message authenticator. I hate to hard-code 468 and 12,
|
|
* but only a few modules include ntp_control.h...
|
|
*/
|
|
#define RX_BUFF_SIZE (468+12+MAX_MAC_LEN)
|
|
|
|
struct recvbuf {
|
|
struct recvbuf *next; /* next buffer in chain */
|
|
union {
|
|
struct sockaddr_in X_recv_srcadr;
|
|
caddr_t X_recv_srcclock;
|
|
struct peer *X_recv_peer;
|
|
} X_from_where;
|
|
#define recv_srcadr X_from_where.X_recv_srcadr
|
|
#define recv_srcclock X_from_where.X_recv_srcclock
|
|
#define recv_peer X_from_where.X_recv_peer
|
|
#if defined HAVE_IO_COMPLETION_PORT
|
|
IoCompletionInfo iocompletioninfo;
|
|
WSABUF wsabuff;
|
|
DWORD AddressLength;
|
|
#else
|
|
struct sockaddr_in srcadr; /* where packet came from */
|
|
#endif
|
|
struct interface *dstadr; /* interface datagram arrived thru */
|
|
int fd; /* fd on which it was received */
|
|
l_fp recv_time; /* time of arrival */
|
|
void (*receiver) P((struct recvbuf *)); /* routine to receive buffer */
|
|
int recv_length; /* number of octets received */
|
|
union {
|
|
struct pkt X_recv_pkt;
|
|
u_char X_recv_buffer[RX_BUFF_SIZE];
|
|
} recv_space;
|
|
#define recv_pkt recv_space.X_recv_pkt
|
|
#define recv_buffer recv_space.X_recv_buffer
|
|
};
|
|
|
|
extern void init_recvbuff P((int));
|
|
|
|
/* freerecvbuf - make a single recvbuf available for reuse
|
|
*/
|
|
extern void freerecvbuf P((struct recvbuf *));
|
|
|
|
|
|
extern struct recvbuf * getrecvbufs P((void));
|
|
|
|
/* Get a free buffer (typically used so an async
|
|
* read can directly place data into the buffer
|
|
*
|
|
* The buffer is removed from the free list. Make sure
|
|
* you put it back with freerecvbuf() or
|
|
*/
|
|
extern struct recvbuf *get_free_recv_buffer P((void));
|
|
|
|
/* Add a buffer to the full list
|
|
*/
|
|
extern void add_full_recv_buffer P((struct recvbuf *));
|
|
|
|
/*extern void process_recv_buffers P((void)); */
|
|
|
|
/* number of recvbufs on freelist */
|
|
extern u_long free_recvbuffs P((void));
|
|
extern u_long full_recvbuffs P((void));
|
|
extern u_long total_recvbuffs P((void));
|
|
extern u_long lowater_additions P((void));
|
|
|
|
/* Returns the next buffer in the full list.
|
|
*
|
|
*/
|
|
extern struct recvbuf *get_full_recv_buffer P((void));
|
|
|
|
#endif /* defined __recvbuff_h */
|
|
|