/* $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 #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 */