diff options
Diffstat (limited to 'include/recvbuff.h')
| -rw-r--r-- | include/recvbuff.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/include/recvbuff.h b/include/recvbuff.h new file mode 100644 index 000000000000..4fde7f19250a --- /dev/null +++ b/include/recvbuff.h @@ -0,0 +1,113 @@ +#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 contains the NTP header, one Autokey + * request, one Autokey response and the MAC. Assuming certificates don't + * get too big, the maximum packet length is set arbitrarily at 1000. + */ +#define RX_BUFF_SIZE 1000 /* hail Mary */ + +struct recvbuf { + struct recvbuf *next; /* next buffer in chain */ + union { + struct sockaddr_storage 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_storage srcadr; /* where packet came from */ +#endif + struct interface *dstadr; /* interface datagram arrived thru */ + SOCKET 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 */ + |