---

gencode.c File Reference

#include <pcap-stdinc.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <setjmp.h>
#include <stdarg.h>
#include "pcap-int.h"
#include "ethertype.h"
#include "nlpid.h"
#include "llc.h"
#include "gencode.h"
#include "atmuni31.h"
#include "sunatmpos.h"
#include "ppp.h"
#include "sll.h"
#include "arcnet.h"
#include <pcap-namedb.h>

Go to the source code of this file.

Data Structures
struct	chunk
Defines
#define	ETHERMTU   1500
#define	IPPROTO_SCTP   132
#define	JMP(c)   ((c)|BPF_JMP|BPF_K)
#define	NCHUNKS   16
#define	CHUNK0SIZE   1024
#define	SWAPLONG(y)   ((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
#define	IPPROTO_IGMP   2
#define	IPPROTO_IGRP   9
#define	IPPROTO_PIM   103
#define	IPPROTO_VRRP   112
#define	IPPROTO_AH   51
#define	IPPROTO_ESP   50
#define	IPPROTO_NONE   59
Functions
void	bpf_error (const char *fmt,...)
void	init_linktype (int)
int	alloc_reg (void)
void	free_reg (int)
void *	newchunk (u_int)
void	freechunks (void)
block *	new_block (int)
slist *	new_stmt (int)
block *	gen_retblk (int)
void	syntax (void)
void	backpatch (struct block *, struct block *)
void	merge (struct block *, struct block *)
block *	gen_cmp (u_int, u_int, bpf_int32)
block *	gen_cmp_gt (u_int, u_int, bpf_int32)
block *	gen_mcmp (u_int, u_int, bpf_int32, bpf_u_int32)
block *	gen_bcmp (u_int, u_int, const u_char *)
block *	gen_ncmp (bpf_u_int32, bpf_u_int32, bpf_u_int32, bpf_u_int32, bpf_u_int32, int)
block *	gen_uncond (int)
block *	gen_true (void)
block *	gen_false (void)
block *	gen_linktype (int)
block *	gen_snap (bpf_u_int32, bpf_u_int32, u_int)
block *	gen_llc (int)
block *	gen_hostop (bpf_u_int32, bpf_u_int32, int, int, u_int, u_int)
block *	gen_ahostop (const u_char *, int)
block *	gen_ehostop (const u_char *, int)
block *	gen_fhostop (const u_char *, int)
block *	gen_thostop (const u_char *, int)
block *	gen_dnhostop (bpf_u_int32, int, u_int)
block *	gen_host (bpf_u_int32, bpf_u_int32, int, int)
block *	gen_gateway (const u_char *, bpf_u_int32 **, int, int)
block *	gen_ipfrag (void)
block *	gen_portatom (int, bpf_int32)
block *	gen_portop (int, int, int)
block *	gen_port (int, int, int)
int	lookup_proto (const char *, int)
block *	gen_protochain (int, int, int)
block *	gen_proto (int, int, int)
slist *	xfer_to_x (struct arth *)
slist *	xfer_to_a (struct arth *)
block *	gen_len (int, int)
block *	gen_msg_abbrev (int type)
void *	newchunk (n) u_int n
int	pcap_compile (pcap_t *p, struct bpf_program *program, char *buf, int optimize, bpf_u_int32 mask)
	Compiles a packet filter. Converts an high level filtering expression (see Filtering expression syntax) in a program that can be interpreted by the kernel-level filtering engine. More...
int	pcap_compile_nopcap (int snaplen_arg, int linktype_arg, struct bpf_program *program, char *buf, int optimize, bpf_u_int32 mask)
	Deprecated, use pcap_open_dead() and pcap_compile() instead . Compiles a packet filter without the need of opening an adapter. Converts an high level filtering expression (see Filtering expression syntax) in a program that can be interpreted by the kernel-level filtering engine. More...
void	pcap_freecode (struct bpf_program *program)
	Frees a filter. More...
void	backpatch (list, target) struct block *list
void	init_linktype (type) int type
void	free_reg (n) int n
block *	gen_broadcast (proto) int proto
Variables
const char	rcsid []
jmp_buf	top_ctx
pcap_t *	bpf_pcap
u_int	orig_linktype = -1
u_int	orig_nl = -1
u_int	orig_nl_nosnap = -1
int	pcap_fddipad
block *	root
chunk	chunks [NCHUNKS]
int	cur_chunk
int	snaplen
int	no_optimize
void *	target
*	b1
	size
bpf_int32	v
bpf_u_int32	mask
	offset
	jtype
	jvalue
int	reverse
int	is_atm = 0
u_int	off_vpi
u_int	off_vci
u_int	off_proto
u_int	off_msg_type
u_int	off_nl
u_int	off_nl_nosnap
int	linktype
bpf_u_int32	ptype
int	dir
int	proto
u_int	src_off
u_int	dst_off
u_int	base_off
bpf_u_int32 **	alist
int	ip_proto
qual	q
*	s2
register int	masklen
*	s1
arth *	index
arth *	a0
arth *	a1
int	reversed
int	curreg
	n
	idx
	val

---

Define Documentation

#define CHUNK0SIZE   1024

Definition at line 136 of file gencode.c.

#define ETHERMTU   1500

Definition at line 80 of file gencode.c.

#define IPPROTO_AH   51

#define IPPROTO_ESP   50

#define IPPROTO_IGMP   2

#define IPPROTO_IGRP   9

#define IPPROTO_NONE   59

#define IPPROTO_PIM   103

#define IPPROTO_SCTP   132

Definition at line 83 of file gencode.c.

#define IPPROTO_VRRP   112

#define JMP (  c    )     ((c)|BPF_JMP|BPF_K)

Definition at line 90 of file gencode.c.

#define NCHUNKS   16

Definition at line 135 of file gencode.c.

#define SWAPLONG (  y    )     ((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))

---

Function Documentation

int alloc_reg (  void    )  [static]

Definition at line 3851 of file gencode.c. References bpf_error, curreg, and n.

void backpatch (  list   , target    )  [static]

void backpatch (  struct block *   , struct block *    )  [static]

void bpf_error (  const char *    fmt, ...    )

Definition at line 108 of file gencode.c. References bpf_pcap, PCAP_ERRBUF_SIZE, pcap_geterr, and top_ctx. Referenced by alloc_reg, and pcap_compile.

void free_reg (  n    )  [static]

void free_reg (  int    )  [static]

void freechunks (  void    )  [static]

Referenced by pcap_compile.

struct block* gen_ahostop (  const u_char *   , int    )  [static]

struct block* gen_bcmp (  u_int   , u_int   , const u_char *    )  [static]

struct block* gen_broadcast (  proto    )

struct block* gen_cmp (  u_int   , u_int   , bpf_int32    )  [static]

struct block* gen_cmp_gt (  u_int   , u_int   , bpf_int32    )  [static]

struct block* gen_dnhostop (  bpf_u_int32   , int   , u_int    )  [static]

struct block* gen_ehostop (  const u_char *   , int    )  [static]

struct block* gen_false (  void    )  [inline, static]

struct block* gen_fhostop (  const u_char *   , int    )  [static]

struct block* gen_gateway (  const u_char *   , bpf_u_int32 **   , int   , int    )  [static]

struct block* gen_host (  bpf_u_int32   , bpf_u_int32   , int   , int    )  [static]

struct block* gen_hostop (  bpf_u_int32   , bpf_u_int32   , int   , int   , u_int   , u_int    )  [static]

struct block* gen_ipfrag (  void    )  [static]

struct block* gen_len (  int   , int    )  [static]

struct block* gen_linktype (  int    )  [static]

struct block* gen_llc (  int    )  [static]

struct block* gen_mcmp (  u_int   , u_int   , bpf_int32   , bpf_u_int32    )  [static]

struct block* gen_msg_abbrev (  int    type )  [static]

struct block* gen_ncmp (  bpf_u_int32   , bpf_u_int32   , bpf_u_int32   , bpf_u_int32   , bpf_u_int32   , int    )  [static]

struct block* gen_port (  int   , int   , int    )  [static]

struct block* gen_portatom (  int   , bpf_int32    )  [static]

struct block* gen_portop (  int   , int   , int    )

struct block* gen_proto (  int   , int   , int    )  [static]

struct block* gen_protochain (  int   , int   , int    )  [static]

struct block* gen_retblk (  int    )  [static]

Referenced by pcap_compile.

struct block* gen_snap (  bpf_u_int32   , bpf_u_int32   , u_int    )  [static]

struct block* gen_thostop (  const u_char *   , int    )  [static]

struct block* gen_true (  void    )  [inline, static]

struct block* gen_uncond (  int    )  [static]

void init_linktype (  type    )  [static]

Referenced by pcap_compile.

void init_linktype (  int    )  [static]

int lookup_proto (  const char *   , int    )  [static]

void merge (  struct block *   , struct block *    )  [static]

struct block* new_block (  int    )  [inline, static]

struct slist* new_stmt (  int    )  [inline, static]

void* newchunk (  n    )  [static]

void* newchunk (  u_int    )  [static]

void syntax (  void    )  [inline, static]

Referenced by pcap_compile.

struct slist* xfer_to_a (  struct arth *    )  [static]

struct slist* xfer_to_x (  struct arth *    )  [static]

---

Variable Documentation

struct arth * a0

Definition at line 3817 of file gencode.c.

struct arth * a1

Definition at line 3817 of file gencode.c.

bpf_u_int32** alist

Definition at line 2207 of file gencode.c.

* b1

Definition at line 455 of file gencode.c.

u_int base_off

Definition at line 1907 of file gencode.c.

pcap_t* bpf_pcap [static]

Definition at line 94 of file gencode.c. Referenced by bpf_error, and pcap_compile.

struct chunk chunks[NCHUNKS] [static]

Definition at line 142 of file gencode.c.

int cur_chunk [static]

Definition at line 143 of file gencode.c.

int curreg [static]

Definition at line 3845 of file gencode.c. Referenced by alloc_reg.

register int dir

Definition at line 4123 of file gencode.c.

u_int dst_off

Definition at line 1687 of file gencode.c.

idx

Definition at line 3917 of file gencode.c.

struct arth* index

Definition at line 3612 of file gencode.c.

int ip_proto

Definition at line 2524 of file gencode.c.

int is_atm = 0 [static]

Definition at line 615 of file gencode.c.

bpf_u_int32 jtype

Definition at line 4204 of file gencode.c.

bpf_u_int32 jvalue

Definition at line 4203 of file gencode.c.

int linktype [static]

Definition at line 654 of file gencode.c.

bpf_u_int32 mask

Definition at line 1979 of file gencode.c. Referenced by pcap_compile, pcap_compile_nopcap, and pcap_setmode.

register int masklen

Definition at line 3372 of file gencode.c.

n

Definition at line 3880 of file gencode.c. Referenced by alloc_reg.

int no_optimize

Definition at line 303 of file gencode.c. Referenced by pcap_compile.

u_int off_msg_type [static]

Definition at line 627 of file gencode.c.

u_int off_nl [static]

Definition at line 651 of file gencode.c.

u_int off_nl_nosnap [static]

Definition at line 652 of file gencode.c.

u_int off_proto [static]

Definition at line 622 of file gencode.c.

u_int off_vci [static]

Definition at line 621 of file gencode.c.

u_int off_vpi [static]

Definition at line 620 of file gencode.c.

u_int offset

Definition at line 1591 of file gencode.c.

u_int orig_linktype = -1 [static]

Definition at line 97 of file gencode.c.

u_int orig_nl = -1 [static]

Definition at line 97 of file gencode.c.

u_int orig_nl_nosnap = -1 [static]

Definition at line 97 of file gencode.c.

int pcap_fddipad

Definition at line 103 of file gencode.c. Referenced by pcap_open_offline.

int proto

Definition at line 2975 of file gencode.c.

bpf_u_int32 ptype

Definition at line 1590 of file gencode.c.

struct qual q

Definition at line 4110 of file gencode.c.

const char rcsid[] [static]

Initial value: "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.175 2002/08/06 07:35:46 guy Exp $ (LBL)" Definition at line 23 of file gencode.c.

int reverse

Definition at line 4205 of file gencode.c.

int reversed

Definition at line 3716 of file gencode.c.

struct block* root [static]

Definition at line 127 of file gencode.c. Referenced by pcap_compile.

* s1

Definition at line 3576 of file gencode.c.

* s2

Definition at line 3371 of file gencode.c.

int size

Definition at line 3613 of file gencode.c. Referenced by pcap_sendpacket, pcap_sendqueue_destroy, pcap_setmintocopy, pcap_setmode, and pcap_setuserbuffer.

int snaplen [static]

Definition at line 302 of file gencode.c. Referenced by pcap_compile.

u_int src_off

Definition at line 1687 of file gencode.c.

void * target

Definition at line 397 of file gencode.c.

jmp_buf top_ctx [static]

Definition at line 93 of file gencode.c. Referenced by bpf_error, and pcap_compile.

bpf_u_int32 v

Definition at line 3413 of file gencode.c.

val

Definition at line 3917 of file gencode.c. Referenced by inet_addrU.

---

documentation. Copyright (c) 2002 Politecnico di Torino. All rights reserved.