3 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
4 * The Regents of the University of California. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that: (1) source code distributions
8 * retain the above copyright notice and this paragraph in its entirety, (2)
9 * distributions including binary code include the above copyright notice and
10 * this paragraph in its entirety in the documentation or other materials
11 * provided with the distribution, and (3) all advertising materials mentioning
12 * features or use of this software display the following acknowledgement:
13 * ``This product includes software developed by the University of California,
14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
15 * the University nor the names of its contributors may be used to endorse
16 * or promote products derived from this software without specific prior
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
24 static const char rcsid
[] _U_
=
25 "@(#) $Header: /tcpdump/master/libpcap/grammar.y,v 1.79.2.3 2004/03/28 21:45:32 fenner Exp $ (LBL)";
33 #include <pcap-stdinc.h>
35 #include <sys/types.h>
37 #include <sys/socket.h>
48 #include <netinet/in.h>
58 #include <pcap-namedb.h>
60 #ifdef HAVE_OS_PROTO_H
64 #define QSET(q, p, d, a) (q).proto = (p),\
70 static struct qual qerr
= { Q_UNDEF
, Q_UNDEF
, Q_UNDEF
, Q_UNDEF
};
107 %type
<blk
> expr id nid pid term rterm qid
109 %type
<i
> pqual dqual aqual ndaqual
111 %type
<i
> byteop pname pnum relop irelop
112 %type
<blk
> and or paren not null prog
113 %type
<rblk
> other pfvar
114 %type
<i
> atmtype atmmultitype
116 %type
<blk
> atmfieldvalue atmvalue atmlistvalue
118 %token DST SRC HOST GATEWAY
119 %token NET NETMASK PORT LESS GREATER PROTO PROTOCHAIN CBYTE
120 %token ARP RARP IP SCTP TCP UDP ICMP IGMP IGRP PIM VRRP
121 %token ATALK AARP DECNET LAT SCA MOPRC MOPDL
122 %token TK_BROADCAST TK_MULTICAST
123 %token NUM INBOUND OUTBOUND
124 %token PF_IFNAME PF_RSET PF_RNR PF_SRNR PF_REASON PF_ACTION
127 %token ID EID HID HID6 AID
130 %token IPV6 ICMPV6 AH ESP
132 %token ISO ESIS CLNP ISIS L1 L2 IIH LSP SNP CSNP PSNP
136 %token LANE LLC METAC BCC SC ILMIC OAMF4EC OAMF4SC
137 %token OAM OAMF4 CONNECTMSG METACONNECT
144 %type
<i
> NUM action reason
161 null: /* null */ { $$.q
= qerr
; }
164 | expr and term
{ gen_and
($1.b
, $3.b
); $$
= $3; }
165 | expr and id
{ gen_and
($1.b
, $3.b
); $$
= $3; }
166 | expr or term
{ gen_or
($1.b
, $3.b
); $$
= $3; }
167 | expr or id
{ gen_or
($1.b
, $3.b
); $$
= $3; }
169 and: AND
{ $$
= $
<blk
>0; }
171 or: OR
{ $$
= $
<blk
>0; }
174 | pnum
{ $$.b
= gen_ncode
(NULL
, (bpf_u_int32
)$1,
176 | paren pid
')' { $$
= $2; }
178 nid: ID
{ $$.b
= gen_scode
($1, $$.q
= $
<blk
>0.q
); }
179 | HID
'/' NUM
{ $$.b
= gen_mcode
($1, NULL
, $3,
181 | HID NETMASK HID
{ $$.b
= gen_mcode
($1, $3, 0,
184 /* Decide how to parse HID based on proto */
186 $$.b
= gen_ncode
($1, 0, $$.q
);
190 $$.b
= gen_mcode6
($1, NULL
, $3,
193 bpf_error
("'ip6addr/prefixlen' not supported "
194 "in this configuration");
199 $$.b
= gen_mcode6
($1, 0, 128,
202 bpf_error
("'ip6addr' not supported "
203 "in this configuration");
207 $$.b
= gen_ecode
($1, $$.q
= $
<blk
>0.q
);
209 * $1 was allocated by "pcap_ether_aton()",
210 * so we must free it now that we're done
216 $$.b
= gen_acode
($1, $$.q
= $
<blk
>0.q
);
218 * $1 was allocated by "pcap_ether_aton()",
219 * so we must free it now that we're done
224 | not id
{ gen_not
($2.b
); $$
= $2; }
226 not: '!' { $$
= $
<blk
>0; }
228 paren: '(' { $$
= $
<blk
>0; }
231 | qid and id
{ gen_and
($1.b
, $3.b
); $$
= $3; }
232 | qid or id
{ gen_or
($1.b
, $3.b
); $$
= $3; }
234 qid: pnum
{ $$.b
= gen_ncode
(NULL
, (bpf_u_int32
)$1,
239 | not term
{ gen_not
($2.b
); $$
= $2; }
241 head: pqual dqual aqual
{ QSET
($$.q
, $1, $2, $3); }
242 | pqual dqual
{ QSET
($$.q
, $1, $2, Q_DEFAULT
); }
243 | pqual aqual
{ QSET
($$.q
, $1, Q_DEFAULT
, $2); }
244 | pqual PROTO
{ QSET
($$.q
, $1, Q_DEFAULT
, Q_PROTO
); }
245 | pqual PROTOCHAIN
{ QSET
($$.q
, $1, Q_DEFAULT
, Q_PROTOCHAIN
); }
246 | pqual ndaqual
{ QSET
($$.q
, $1, Q_DEFAULT
, $2); }
248 rterm: head id
{ $$
= $2; }
249 | paren expr
')' { $$.b
= $2.b
; $$.q
= $1.q
; }
250 | pname
{ $$.b
= gen_proto_abbrev
($1); $$.q
= qerr
; }
251 | arth relop arth
{ $$.b
= gen_relation
($2, $1, $3, 0);
253 | arth irelop arth
{ $$.b
= gen_relation
($2, $1, $3, 1);
255 | other
{ $$.b
= $1; $$.q
= qerr
; }
256 | atmtype
{ $$.b
= gen_atmtype_abbrev
($1); $$.q
= qerr
; }
257 | atmmultitype
{ $$.b
= gen_atmmulti_abbrev
($1); $$.q
= qerr
; }
258 | atmfield atmvalue
{ $$.b
= $2.b
; $$.q
= qerr
; }
260 /* protocol level qualifiers */
262 |
{ $$
= Q_DEFAULT
; }
264 /* 'direction' qualifiers */
265 dqual: SRC
{ $$
= Q_SRC
; }
266 | DST
{ $$
= Q_DST
; }
267 | SRC OR DST
{ $$
= Q_OR
; }
268 | DST OR SRC
{ $$
= Q_OR
; }
269 | SRC AND DST
{ $$
= Q_AND
; }
270 | DST AND SRC
{ $$
= Q_AND
; }
272 /* address type qualifiers */
273 aqual: HOST
{ $$
= Q_HOST
; }
274 | NET
{ $$
= Q_NET
; }
275 | PORT
{ $$
= Q_PORT
; }
277 /* non-directional address type qualifiers */
278 ndaqual: GATEWAY
{ $$
= Q_GATEWAY
; }
280 pname: LINK
{ $$
= Q_LINK
; }
282 | ARP
{ $$
= Q_ARP
; }
283 | RARP
{ $$
= Q_RARP
; }
284 | SCTP
{ $$
= Q_SCTP
; }
285 | TCP
{ $$
= Q_TCP
; }
286 | UDP
{ $$
= Q_UDP
; }
287 | ICMP
{ $$
= Q_ICMP
; }
288 | IGMP
{ $$
= Q_IGMP
; }
289 | IGRP
{ $$
= Q_IGRP
; }
290 | PIM
{ $$
= Q_PIM
; }
291 | VRRP
{ $$
= Q_VRRP
; }
292 | ATALK
{ $$
= Q_ATALK
; }
293 | AARP
{ $$
= Q_AARP
; }
294 | DECNET
{ $$
= Q_DECNET
; }
295 | LAT
{ $$
= Q_LAT
; }
296 | SCA
{ $$
= Q_SCA
; }
297 | MOPDL
{ $$
= Q_MOPDL
; }
298 | MOPRC
{ $$
= Q_MOPRC
; }
299 | IPV6
{ $$
= Q_IPV6
; }
300 | ICMPV6
{ $$
= Q_ICMPV6
; }
302 | ESP
{ $$
= Q_ESP
; }
303 | ISO
{ $$
= Q_ISO
; }
304 | ESIS
{ $$
= Q_ESIS
; }
305 | ISIS
{ $$
= Q_ISIS
; }
306 | L1
{ $$
= Q_ISIS_L1
; }
307 | L2
{ $$
= Q_ISIS_L2
; }
308 | IIH
{ $$
= Q_ISIS_IIH
; }
309 | LSP
{ $$
= Q_ISIS_LSP
; }
310 | SNP
{ $$
= Q_ISIS_SNP
; }
311 | PSNP
{ $$
= Q_ISIS_PSNP
; }
312 | CSNP
{ $$
= Q_ISIS_CSNP
; }
313 | CLNP
{ $$
= Q_CLNP
; }
314 | STP
{ $$
= Q_STP
; }
315 | IPX
{ $$
= Q_IPX
; }
316 | NETBEUI
{ $$
= Q_NETBEUI
; }
318 other: pqual TK_BROADCAST
{ $$
= gen_broadcast
($1); }
319 | pqual TK_MULTICAST
{ $$
= gen_multicast
($1); }
320 | LESS NUM
{ $$
= gen_less
($2); }
321 | GREATER NUM
{ $$
= gen_greater
($2); }
322 | CBYTE NUM byteop NUM
{ $$
= gen_byteop
($3, $2, $4); }
323 | INBOUND
{ $$
= gen_inbound
(0); }
324 | OUTBOUND
{ $$
= gen_inbound
(1); }
325 | VLAN pnum
{ $$
= gen_vlan
($2); }
326 | VLAN
{ $$
= gen_vlan
(-1); }
330 pfvar: PF_IFNAME ID
{ $$
= gen_pf_ifname
($2); }
331 | PF_RSET ID
{ $$
= gen_pf_ruleset
($2); }
332 | PF_RNR NUM
{ $$
= gen_pf_rnr
($2); }
333 | PF_SRNR NUM
{ $$
= gen_pf_srnr
($2); }
334 | PF_REASON reason
{ $$
= gen_pf_reason
($2); }
335 | PF_ACTION action
{ $$
= gen_pf_action
($2); }
338 reason: NUM
{ $$
= $1; }
339 | ID
{ const char *reasons
[] = PFRES_NAMES
;
341 for
(i
= 0; reasons
[i
]; i
++) {
342 if
(pcap_strcasecmp
($1, reasons
[i
]) == 0) {
347 if
(reasons
[i
] == NULL
)
348 bpf_error
("unknown PF reason");
352 action: ID
{ if
(pcap_strcasecmp
($1, "pass") == 0 ||
353 pcap_strcasecmp
($1, "accept") == 0)
355 else if
(pcap_strcasecmp
($1, "drop") == 0 ||
356 pcap_strcasecmp
($1, "block") == 0)
359 bpf_error
("unknown PF action");
363 relop: '>' { $$
= BPF_JGT
; }
364 | GEQ
{ $$
= BPF_JGE
; }
365 |
'=' { $$
= BPF_JEQ
; }
367 irelop: LEQ
{ $$
= BPF_JGT
; }
368 |
'<' { $$
= BPF_JGE
; }
369 | NEQ
{ $$
= BPF_JEQ
; }
371 arth: pnum
{ $$
= gen_loadi
($1); }
374 narth: pname
'[' arth
']' { $$
= gen_load
($1, $3, 1); }
375 | pname
'[' arth
':' NUM
']' { $$
= gen_load
($1, $3, $5); }
376 | arth
'+' arth
{ $$
= gen_arth
(BPF_ADD
, $1, $3); }
377 | arth
'-' arth
{ $$
= gen_arth
(BPF_SUB
, $1, $3); }
378 | arth
'*' arth
{ $$
= gen_arth
(BPF_MUL
, $1, $3); }
379 | arth
'/' arth
{ $$
= gen_arth
(BPF_DIV
, $1, $3); }
380 | arth
'&' arth
{ $$
= gen_arth
(BPF_AND
, $1, $3); }
381 | arth
'|' arth
{ $$
= gen_arth
(BPF_OR
, $1, $3); }
382 | arth LSH arth
{ $$
= gen_arth
(BPF_LSH
, $1, $3); }
383 | arth RSH arth
{ $$
= gen_arth
(BPF_RSH
, $1, $3); }
384 |
'-' arth %prec UMINUS
{ $$
= gen_neg
($2); }
385 | paren narth
')' { $$
= $2; }
386 | LEN
{ $$
= gen_loadlen
(); }
388 byteop: '&' { $$
= '&'; }
395 | paren pnum
')' { $$
= $2; }
397 atmtype: LANE
{ $$
= A_LANE
; }
398 | LLC
{ $$
= A_LLC
; }
399 | METAC
{ $$
= A_METAC
; }
400 | BCC
{ $$
= A_BCC
; }
401 | OAMF4EC
{ $$
= A_OAMF4EC
; }
402 | OAMF4SC
{ $$
= A_OAMF4SC
; }
404 | ILMIC
{ $$
= A_ILMIC
; }
406 atmmultitype: OAM
{ $$
= A_OAM
; }
407 | OAMF4
{ $$
= A_OAMF4
; }
408 | CONNECTMSG
{ $$
= A_CONNECTMSG
; }
409 | METACONNECT
{ $$
= A_METACONNECT
; }
411 /* ATM field types quantifier */
412 atmfield: VPI
{ $$.atmfieldtype
= A_VPI
; }
413 | VCI
{ $$.atmfieldtype
= A_VCI
; }
415 atmvalue: atmfieldvalue
416 | relop NUM
{ $$.b
= gen_atmfield_code
($
<blk
>0.atmfieldtype
, (u_int
)$2, (u_int
)$1, 0); }
417 | irelop NUM
{ $$.b
= gen_atmfield_code
($
<blk
>0.atmfieldtype
, (u_int
)$2, (u_int
)$1, 1); }
418 | paren atmlistvalue
')' { $$.b
= $2.b
; $$.q
= qerr
; }
421 $$.atmfieldtype
= $
<blk
>0.atmfieldtype
;
422 if
($$.atmfieldtype
== A_VPI ||
423 $$.atmfieldtype
== A_VCI
)
424 $$.b
= gen_atmfield_code
($$.atmfieldtype
, (u_int
) $1, BPF_JEQ
, 0);
427 atmlistvalue: atmfieldvalue
428 | atmlistvalue or atmfieldvalue
{ gen_or
($1.b
, $3.b
); $$
= $3; }