/*
* Copyright (c) 2001-2002 Packet Design, LLC.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty,
* use and redistribution of this software, in source or object code
* forms, with or without modifications are expressly permitted by
* Packet Design; provided, however, that:
*
* (i) Any and all reproductions of the source or object code
* must include the copyright notice above and the following
* disclaimer of warranties; and
* (ii) No rights are granted, in any manner or form, to use
* Packet Design trademarks, including the mark "PACKET DESIGN"
* on advertising, endorsements, or otherwise except as such
* appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
* THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
* OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
* OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
* RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
* LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
* OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
* DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
* USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER 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 PACKET DESIGN IS ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* Author: Archie Cobbs <archie@freebsd.org>
*/
#ifndef _PDEL_STRUCTS_TYPE_BPF_H_
#define _PDEL_STRUCTS_TYPE_BPF_H_
/*********************************************************************
BPF PROGRAM TYPE
*********************************************************************/
/*
* This type handles BPF programs. Multiple instances of the same
* BPF program will re-use the same structure, saving space.
*
* The data is a *pointer* to a 'struct structs_bpf': multiple instances
* may point to the same BPF program if they have the same tcpdump string
* and link type. This is an optimization.
*
* The ASCII representation of this type is a tcpdump string.
*
* Newly created instances are initialized with the empty string,
* which generates a BPF program that matches all packets.
*/
/*
* Function type for supplying a BPF compiler routine.
*
* This function should compile 'string' and fill out the 'bpf' structure.
* The bpf->bf_insns array should be allocated with NULL memory type
* (to be consistent with libpcap).
*
* Should return 0 on success; Otherwise, -1 should be returned and a
* message printed into 'ebuf' which has size 'emax' (see snprintf(3)).
*/
typedef int structs_bpf_compile_t(const char *string,
struct bpf_program *bpf, int linktype,
char *ebuf, size_t emax);
/* A compiled BPF program structure */
struct structs_bpf {
const char *ascii; /* ascii form of program */
struct bpf_program bpf; /* compiled bpf program */
int linktype; /* bpf link type */
int _refs; /* ref count: don't touch! */
};
/*
* Macro arguments:
* [int] BPF link type, e.g., DLT_EN10MB
* [structs_bpf_compile_t *] BPF compiler, or NULL for unsupported
*/
#define BPF_STRUCTS_TYPE(linktype, comp) { \
sizeof(struct structs_bpf *), \
"bpf", \
STRUCTS_TYPE_PRIMITIVE, \
structs_bpf_init, \
structs_bpf_copy, \
structs_bpf_equal, \
structs_bpf_ascify, \
structs_bpf_binify, \
structs_bpf_encode, \
structs_bpf_decode, \
structs_bpf_free, \
{ { (void *)(linktype) }, { (void *)(comp) }, { NULL } }\
}
__BEGIN_DECLS
/* Structs methods */
extern structs_init_t structs_bpf_init;
extern structs_copy_t structs_bpf_copy;
extern structs_equal_t structs_bpf_equal;
extern structs_ascify_t structs_bpf_ascify;
extern structs_binify_t structs_bpf_binify;
extern structs_encode_t structs_bpf_encode;
extern structs_decode_t structs_bpf_decode;
extern structs_uninit_t structs_bpf_free;
__END_DECLS
#endif /* _PDEL_STRUCTS_TYPE_BPF_H_ */
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