126 lines
4.1 KiB
C
126 lines
4.1 KiB
C
|
/* $Id: cache.h 2423 2010-03-13 07:09:49Z aturner $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2001-2010 Aaron Turner.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
*
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the names of the copyright owners nor the names of its
|
||
|
|
* contributors may be used to endorse or promote products derived from
|
||
|
|
* this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
||
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
||
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
||
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
||
|
|
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
||
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
||
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __CACHE_H__
|
||
|
|
#define __CACHE_H__
|
||
|
|
|
||
|
|
#define CACHEMAGIC "tcpprep"
|
||
|
|
#define CACHEVERSION "04"
|
||
|
|
#define CACHEDATASIZE 255
|
||
|
|
#define CACHE_PACKETS_PER_BYTE 4 /* number of packets / byte */
|
||
|
|
#define CACHE_BITS_PER_PACKET 2 /* number of bits / packet */
|
||
|
|
|
||
|
|
#define SEND 1
|
||
|
|
#define DONT_SEND 0
|
||
|
|
|
||
|
|
/*
|
||
|
|
* CACHEVERSION History:
|
||
|
|
* 01 - Inital release. 1 bit of data/packet (primary or secondary nic)
|
||
|
|
* 02 - 2 bits of data/packet (drop/send & primary or secondary nic)
|
||
|
|
* 03 - Write integers in network-byte order
|
||
|
|
* 04 - Increase num_packets from 32 to 64 bit integer
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct tcpr_cache_s {
|
||
|
|
char data[CACHEDATASIZE];
|
||
|
|
unsigned int packets; /* number of packets tracked in data */
|
||
|
|
struct tcpr_cache_s *next;
|
||
|
|
};
|
||
|
|
typedef struct tcpr_cache_s tcpr_cache_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Each byte in cache_type.data represents CACHE_PACKETS_PER_BYTE (4) number of packets
|
||
|
|
* Each packet has CACHE_BITS_PER_PACKETS (2) bits of data.
|
||
|
|
* High Bit: 1 = send, 0 = don't send
|
||
|
|
* Low Bit: 1 = primary interface, 0 = secondary interface
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* cache_file_header Data structure defining a file as a tcpprep cache file
|
||
|
|
* and it's version
|
||
|
|
*
|
||
|
|
* If you need to enhance this struct, do so AFTER the version field and be sure
|
||
|
|
* to increment CACHEVERSION
|
||
|
|
*/
|
||
|
|
struct tcpr_cache_file_hdr_s {
|
||
|
|
char magic[8];
|
||
|
|
char version[4];
|
||
|
|
/* begin version 2 features */
|
||
|
|
/* version 3 puts everything in network-byte order */
|
||
|
|
/* version 4 makes num_packets a 64 bit int */
|
||
|
|
u_int64_t num_packets; /* total # of packets in file */
|
||
|
|
u_int16_t packets_per_byte;
|
||
|
|
u_int16_t comment_len; /* how long is the user comment? */
|
||
|
|
} __attribute__((__packed__));
|
||
|
|
|
||
|
|
typedef struct tcpr_cache_file_hdr_s tcpr_cache_file_hdr_t;
|
||
|
|
|
||
|
|
enum tcpr_dir_e {
|
||
|
|
TCPR_DIR_ERROR = -1,
|
||
|
|
TCPR_DIR_NOSEND = 0,
|
||
|
|
TCPR_DIR_C2S = 1, /* aka PRIMARY */
|
||
|
|
TCPR_DIR_S2C = 2 /* aka SECONDARY */
|
||
|
|
};
|
||
|
|
typedef enum tcpr_dir_e tcpr_dir_t;
|
||
|
|
|
||
|
|
|
||
|
|
COUNTER write_cache(tcpr_cache_t *, const int, COUNTER, char *);
|
||
|
|
tcpr_dir_t add_cache(tcpr_cache_t **, const int, const tcpr_dir_t);
|
||
|
|
COUNTER read_cache(char **, const char *, char **);
|
||
|
|
tcpr_dir_t check_cache(char *, COUNTER);
|
||
|
|
|
||
|
|
/* return values for check_cache
|
||
|
|
#define CACHE_ERROR -1
|
||
|
|
#define CACHE_NOSEND 0 // NULL
|
||
|
|
#define CACHE_PRIMARY 1
|
||
|
|
#define CACHE_SECONDARY 2
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/* macro to change a bitstring to 8 bits */
|
||
|
|
#define BIT_STR(x) x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7]
|
||
|
|
|
||
|
|
/* string of 8 zeros */
|
||
|
|
#define EIGHT_ZEROS "\060\060\060\060\060\060\060\060"
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
Local Variables:
|
||
|
|
mode:c
|
||
|
|
indent-tabs-mode:nil
|
||
|
|
c-basic-offset:4
|
||
|
|
End:
|
||
|
|
*/
|
||
|
|
|