Local changes: - In contrib/libpcap/pcap/bpf.h, do not include pcap/dlt.h. Our system net/dlt.h is pulled in from net/bpf.h. - sys/net/dlt.h: Incorporate changes from libpcap 1.10.3. - lib/libpcap/Makefile: Update for libpcap 1.10.3. Changelog: https://git.tcpdump.org/libpcap/blob/95691ebe7564afa3faa5c6ba0dbd17e351be455a:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/libpcap-1.10.3.tar.gz Sponsored by: The FreeBSD Foundation
417 lines
13 KiB
C
417 lines
13 KiB
C
/*
|
|
* Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code distributions
|
|
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
* distributions including binary code include the above copyright notice and
|
|
* this paragraph in its entirety in the documentation or other materials
|
|
* provided with the distribution, and (3) all advertising materials mentioning
|
|
* features or use of this software display the following acknowledgement:
|
|
* ``This product includes software developed by the University of California,
|
|
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
* the University 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 WITHOUT ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
#ifndef gencode_h
|
|
#define gencode_h
|
|
|
|
#include "pcap/funcattrs.h"
|
|
/*
|
|
* pcap/bpf.h (a public header) needs u_char, u_short and u_int, which can be
|
|
* made available via either pcap-types.h (a private header) or pcap/pcap.h
|
|
* (a public header), none of which pcap/bpf.h includes. Include the private
|
|
* header to keep things simple, this way this private header should compile
|
|
* even if included early from another file.
|
|
*/
|
|
#include "pcap-types.h"
|
|
#include "pcap/bpf.h" /* bpf_u_int32 and BPF_MEMWORDS */
|
|
|
|
/*
|
|
* ATM support:
|
|
*
|
|
* Copyright (c) 1997 Yen Yen Lim and North Dakota State University
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Yen Yen Lim and
|
|
* North Dakota State University
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*/
|
|
|
|
/* Address qualifiers. */
|
|
|
|
#define Q_HOST 1
|
|
#define Q_NET 2
|
|
#define Q_PORT 3
|
|
#define Q_GATEWAY 4
|
|
#define Q_PROTO 5
|
|
#define Q_PROTOCHAIN 6
|
|
#define Q_PORTRANGE 7
|
|
|
|
/* Protocol qualifiers. */
|
|
|
|
#define Q_LINK 1
|
|
#define Q_IP 2
|
|
#define Q_ARP 3
|
|
#define Q_RARP 4
|
|
#define Q_SCTP 5
|
|
#define Q_TCP 6
|
|
#define Q_UDP 7
|
|
#define Q_ICMP 8
|
|
#define Q_IGMP 9
|
|
#define Q_IGRP 10
|
|
|
|
|
|
#define Q_ATALK 11
|
|
#define Q_DECNET 12
|
|
#define Q_LAT 13
|
|
#define Q_SCA 14
|
|
#define Q_MOPRC 15
|
|
#define Q_MOPDL 16
|
|
|
|
|
|
#define Q_IPV6 17
|
|
#define Q_ICMPV6 18
|
|
#define Q_AH 19
|
|
#define Q_ESP 20
|
|
|
|
#define Q_PIM 21
|
|
#define Q_VRRP 22
|
|
|
|
#define Q_AARP 23
|
|
|
|
#define Q_ISO 24
|
|
#define Q_ESIS 25
|
|
#define Q_ISIS 26
|
|
#define Q_CLNP 27
|
|
|
|
#define Q_STP 28
|
|
|
|
#define Q_IPX 29
|
|
|
|
#define Q_NETBEUI 30
|
|
|
|
/* IS-IS Levels */
|
|
#define Q_ISIS_L1 31
|
|
#define Q_ISIS_L2 32
|
|
/* PDU types */
|
|
#define Q_ISIS_IIH 33
|
|
#define Q_ISIS_SNP 34
|
|
#define Q_ISIS_CSNP 35
|
|
#define Q_ISIS_PSNP 36
|
|
#define Q_ISIS_LSP 37
|
|
|
|
#define Q_RADIO 38
|
|
|
|
#define Q_CARP 39
|
|
|
|
/* Directional qualifiers. */
|
|
|
|
#define Q_SRC 1
|
|
#define Q_DST 2
|
|
#define Q_OR 3
|
|
#define Q_AND 4
|
|
#define Q_ADDR1 5
|
|
#define Q_ADDR2 6
|
|
#define Q_ADDR3 7
|
|
#define Q_ADDR4 8
|
|
#define Q_RA 9
|
|
#define Q_TA 10
|
|
|
|
#define Q_DEFAULT 0
|
|
#define Q_UNDEF 255
|
|
|
|
/* ATM types */
|
|
#define A_METAC 22 /* Meta signalling Circuit */
|
|
#define A_BCC 23 /* Broadcast Circuit */
|
|
#define A_OAMF4SC 24 /* Segment OAM F4 Circuit */
|
|
#define A_OAMF4EC 25 /* End-to-End OAM F4 Circuit */
|
|
#define A_SC 26 /* Signalling Circuit*/
|
|
#define A_ILMIC 27 /* ILMI Circuit */
|
|
#define A_OAM 28 /* OAM cells : F4 only */
|
|
#define A_OAMF4 29 /* OAM F4 cells: Segment + End-to-end */
|
|
#define A_LANE 30 /* LANE traffic */
|
|
#define A_LLC 31 /* LLC-encapsulated traffic */
|
|
|
|
/* Based on Q.2931 signalling protocol */
|
|
#define A_SETUP 41 /* Setup message */
|
|
#define A_CALLPROCEED 42 /* Call proceeding message */
|
|
#define A_CONNECT 43 /* Connect message */
|
|
#define A_CONNECTACK 44 /* Connect Ack message */
|
|
#define A_RELEASE 45 /* Release message */
|
|
#define A_RELEASE_DONE 46 /* Release message */
|
|
|
|
/* ATM field types */
|
|
#define A_VPI 51
|
|
#define A_VCI 52
|
|
#define A_PROTOTYPE 53
|
|
#define A_MSGTYPE 54
|
|
#define A_CALLREFTYPE 55
|
|
|
|
#define A_CONNECTMSG 70 /* returns Q.2931 signalling messages for
|
|
establishing and destroying switched
|
|
virtual connection */
|
|
#define A_METACONNECT 71 /* returns Q.2931 signalling messages for
|
|
establishing and destroying predefined
|
|
virtual circuits, such as broadcast
|
|
circuit, oamf4 segment circuit, oamf4
|
|
end-to-end circuits, ILMI circuits or
|
|
connection signalling circuit. */
|
|
|
|
/* MTP2 types */
|
|
#define M_FISU 22 /* FISU */
|
|
#define M_LSSU 23 /* LSSU */
|
|
#define M_MSU 24 /* MSU */
|
|
|
|
/* MTP2 HSL types */
|
|
#define MH_FISU 25 /* FISU for HSL */
|
|
#define MH_LSSU 26 /* LSSU */
|
|
#define MH_MSU 27 /* MSU */
|
|
|
|
/* MTP3 field types */
|
|
#define M_SIO 1
|
|
#define M_OPC 2
|
|
#define M_DPC 3
|
|
#define M_SLS 4
|
|
|
|
/* MTP3 field types in case of MTP2 HSL */
|
|
#define MH_SIO 5
|
|
#define MH_OPC 6
|
|
#define MH_DPC 7
|
|
#define MH_SLS 8
|
|
|
|
|
|
struct slist;
|
|
|
|
/*
|
|
* A single statement, corresponding to an instruction in a block.
|
|
*/
|
|
struct stmt {
|
|
int code; /* opcode */
|
|
struct slist *jt; /* only for relative jump in block */
|
|
struct slist *jf; /* only for relative jump in block */
|
|
bpf_u_int32 k; /* k field */
|
|
};
|
|
|
|
struct slist {
|
|
struct stmt s;
|
|
struct slist *next;
|
|
};
|
|
|
|
/*
|
|
* A bit vector to represent definition sets. We assume TOT_REGISTERS
|
|
* is smaller than 8*sizeof(atomset).
|
|
*/
|
|
typedef bpf_u_int32 atomset;
|
|
#define ATOMMASK(n) (1 << (n))
|
|
#define ATOMELEM(d, n) (d & ATOMMASK(n))
|
|
|
|
/*
|
|
* An unbounded set.
|
|
*/
|
|
typedef bpf_u_int32 *uset;
|
|
|
|
/*
|
|
* Total number of atomic entities, including accumulator (A) and index (X).
|
|
* We treat all these guys similarly during flow analysis.
|
|
*/
|
|
#define N_ATOMS (BPF_MEMWORDS+2)
|
|
|
|
/*
|
|
* Control flow graph of a program.
|
|
* This corresponds to an edge in the CFG.
|
|
* It's a directed graph, so an edge has a predecessor and a successor.
|
|
*/
|
|
struct edge {
|
|
u_int id;
|
|
int code; /* opcode for branch corresponding to this edge */
|
|
uset edom;
|
|
struct block *succ; /* successor vertex */
|
|
struct block *pred; /* predecessor vertex */
|
|
struct edge *next; /* link list of incoming edges for a node */
|
|
};
|
|
|
|
/*
|
|
* A block is a vertex in the CFG.
|
|
* It has a list of statements, with the final statement being a
|
|
* branch to successor blocks.
|
|
*/
|
|
struct block {
|
|
u_int id;
|
|
struct slist *stmts; /* side effect stmts */
|
|
struct stmt s; /* branch stmt */
|
|
int mark;
|
|
u_int longjt; /* jt branch requires long jump */
|
|
u_int longjf; /* jf branch requires long jump */
|
|
int level;
|
|
int offset;
|
|
int sense;
|
|
struct edge et; /* edge corresponding to the jt branch */
|
|
struct edge ef; /* edge corresponding to the jf branch */
|
|
struct block *head;
|
|
struct block *link; /* link field used by optimizer */
|
|
uset dom;
|
|
uset closure;
|
|
struct edge *in_edges; /* first edge in the set (linked list) of edges with this as a successor */
|
|
atomset def, kill;
|
|
atomset in_use;
|
|
atomset out_use;
|
|
int oval; /* value ID for value tested in branch stmt */
|
|
bpf_u_int32 val[N_ATOMS];
|
|
};
|
|
|
|
/*
|
|
* A value of 0 for val[i] means the value is unknown.
|
|
*/
|
|
#define VAL_UNKNOWN 0
|
|
|
|
struct arth {
|
|
struct block *b; /* protocol checks */
|
|
struct slist *s; /* stmt list */
|
|
int regno; /* virtual register number of result */
|
|
};
|
|
|
|
struct qual {
|
|
unsigned char addr;
|
|
unsigned char proto;
|
|
unsigned char dir;
|
|
unsigned char pad;
|
|
};
|
|
|
|
struct _compiler_state;
|
|
|
|
typedef struct _compiler_state compiler_state_t;
|
|
|
|
struct arth *gen_loadi(compiler_state_t *, bpf_u_int32);
|
|
struct arth *gen_load(compiler_state_t *, int, struct arth *, bpf_u_int32);
|
|
struct arth *gen_loadlen(compiler_state_t *);
|
|
struct arth *gen_neg(compiler_state_t *, struct arth *);
|
|
struct arth *gen_arth(compiler_state_t *, int, struct arth *, struct arth *);
|
|
|
|
void gen_and(struct block *, struct block *);
|
|
void gen_or(struct block *, struct block *);
|
|
void gen_not(struct block *);
|
|
|
|
struct block *gen_scode(compiler_state_t *, const char *, struct qual);
|
|
struct block *gen_ecode(compiler_state_t *, const char *, struct qual);
|
|
struct block *gen_acode(compiler_state_t *, const char *, struct qual);
|
|
struct block *gen_mcode(compiler_state_t *, const char *, const char *,
|
|
bpf_u_int32, struct qual);
|
|
#ifdef INET6
|
|
struct block *gen_mcode6(compiler_state_t *, const char *, const char *,
|
|
bpf_u_int32, struct qual);
|
|
#endif
|
|
struct block *gen_ncode(compiler_state_t *, const char *, bpf_u_int32,
|
|
struct qual);
|
|
struct block *gen_proto_abbrev(compiler_state_t *, int);
|
|
struct block *gen_relation(compiler_state_t *, int, struct arth *,
|
|
struct arth *, int);
|
|
struct block *gen_less(compiler_state_t *, int);
|
|
struct block *gen_greater(compiler_state_t *, int);
|
|
struct block *gen_byteop(compiler_state_t *, int, int, bpf_u_int32);
|
|
struct block *gen_broadcast(compiler_state_t *, int);
|
|
struct block *gen_multicast(compiler_state_t *, int);
|
|
struct block *gen_ifindex(compiler_state_t *, int);
|
|
struct block *gen_inbound(compiler_state_t *, int);
|
|
|
|
struct block *gen_llc(compiler_state_t *);
|
|
struct block *gen_llc_i(compiler_state_t *);
|
|
struct block *gen_llc_s(compiler_state_t *);
|
|
struct block *gen_llc_u(compiler_state_t *);
|
|
struct block *gen_llc_s_subtype(compiler_state_t *, bpf_u_int32);
|
|
struct block *gen_llc_u_subtype(compiler_state_t *, bpf_u_int32);
|
|
|
|
struct block *gen_vlan(compiler_state_t *, bpf_u_int32, int);
|
|
struct block *gen_mpls(compiler_state_t *, bpf_u_int32, int);
|
|
|
|
struct block *gen_pppoed(compiler_state_t *);
|
|
struct block *gen_pppoes(compiler_state_t *, bpf_u_int32, int);
|
|
|
|
struct block *gen_geneve(compiler_state_t *, bpf_u_int32, int);
|
|
|
|
struct block *gen_atmfield_code(compiler_state_t *, int, bpf_u_int32,
|
|
int, int);
|
|
struct block *gen_atmtype_abbrev(compiler_state_t *, int);
|
|
struct block *gen_atmmulti_abbrev(compiler_state_t *, int);
|
|
|
|
struct block *gen_mtp2type_abbrev(compiler_state_t *, int);
|
|
struct block *gen_mtp3field_code(compiler_state_t *, int, bpf_u_int32,
|
|
int, int);
|
|
|
|
struct block *gen_pf_ifname(compiler_state_t *, const char *);
|
|
struct block *gen_pf_rnr(compiler_state_t *, int);
|
|
struct block *gen_pf_srnr(compiler_state_t *, int);
|
|
struct block *gen_pf_ruleset(compiler_state_t *, char *);
|
|
struct block *gen_pf_reason(compiler_state_t *, int);
|
|
struct block *gen_pf_action(compiler_state_t *, int);
|
|
|
|
struct block *gen_p80211_type(compiler_state_t *, bpf_u_int32, bpf_u_int32);
|
|
struct block *gen_p80211_fcdir(compiler_state_t *, bpf_u_int32);
|
|
|
|
/*
|
|
* Representation of a program as a tree of blocks, plus current mark.
|
|
* A block is marked if only if its mark equals the current mark.
|
|
* Rather than traverse the code array, marking each item, 'cur_mark'
|
|
* is incremented. This automatically makes each element unmarked.
|
|
*/
|
|
#define isMarked(icp, p) ((p)->mark == (icp)->cur_mark)
|
|
#define unMarkAll(icp) (icp)->cur_mark += 1
|
|
#define Mark(icp, p) ((p)->mark = (icp)->cur_mark)
|
|
|
|
struct icode {
|
|
struct block *root;
|
|
int cur_mark;
|
|
};
|
|
|
|
int bpf_optimize(struct icode *, char *);
|
|
void bpf_set_error(compiler_state_t *, const char *, ...)
|
|
PCAP_PRINTFLIKE(2, 3);
|
|
|
|
int finish_parse(compiler_state_t *, struct block *);
|
|
char *sdup(compiler_state_t *, const char *);
|
|
|
|
struct bpf_insn *icode_to_fcode(struct icode *, struct block *, u_int *,
|
|
char *);
|
|
void sappend(struct slist *, struct slist *);
|
|
|
|
/*
|
|
* Older versions of Bison don't put this declaration in
|
|
* grammar.h.
|
|
*/
|
|
int pcap_parse(void *, compiler_state_t *);
|
|
|
|
/* XXX */
|
|
#define JT(b) ((b)->et.succ)
|
|
#define JF(b) ((b)->ef.succ)
|
|
|
|
#endif /* gencode_h */
|