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Commit | Line | Data |
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b9d70dc8 PM |
1 | /* |
2 | * BIRD - filters | |
3 | * | |
1c20608e | 4 | * Copyright 1998--2000 Pavel Machek |
b9d70dc8 PM |
5 | * |
6 | * Can be freely distributed and used under the terms of the GNU GPL. | |
c9f8c1a8 | 7 | * |
1877dab2 | 8 | FIXME: priority of ! should be lower |
b9d70dc8 PM |
9 | */ |
10 | ||
11 | CF_HDR | |
12 | ||
8bdb05ed | 13 | #include "filter/f-inst.h" |
4f082dfa | 14 | #include "filter/data.h" |
8bdb05ed | 15 | |
2edb31b0 MM |
16 | CF_DEFINES |
17 | ||
b8cc390e OZ |
18 | static inline u32 pair(u32 a, u32 b) { return (a << 16) | b; } |
19 | static inline u32 pair_a(u32 p) { return p >> 16; } | |
20 | static inline u32 pair_b(u32 p) { return p & 0xFFFF; } | |
21 | ||
a84b8b6e MM |
22 | #define f_generate_complex(fi_code, da, arg) \ |
23 | f_new_inst(FI_EA_SET, f_new_inst(fi_code, f_new_inst(FI_EA_GET, da), arg), da) | |
24 | ||
b8cc390e OZ |
25 | /* |
26 | * Sets and their items are during parsing handled as lists, linked | |
27 | * through left ptr. The first item in a list also contains a pointer | |
28 | * to the last item in a list (right ptr). For convenience, even items | |
29 | * are handled as one-item lists. Lists are merged by f_merge_items(). | |
30 | */ | |
b2f00837 OZ |
31 | static int |
32 | f_valid_set_type(int type) | |
33 | { | |
34 | switch (type) | |
35 | { | |
36 | case T_INT: | |
37 | case T_PAIR: | |
38 | case T_QUAD: | |
39 | case T_ENUM: | |
40 | case T_IP: | |
41 | case T_EC: | |
66dbdbd9 | 42 | case T_LC: |
83715aa8 | 43 | case T_RD: |
b2f00837 OZ |
44 | return 1; |
45 | ||
46 | default: | |
47 | return 0; | |
48 | } | |
49 | } | |
b8cc390e OZ |
50 | |
51 | static inline struct f_tree * | |
52 | f_new_item(struct f_val from, struct f_val to) | |
92a72a4c | 53 | { |
b8cc390e OZ |
54 | struct f_tree *t = f_new_tree(); |
55 | t->right = t; | |
56 | t->from = from; | |
57 | t->to = to; | |
58 | return t; | |
59 | } | |
92a72a4c | 60 | |
b8cc390e OZ |
61 | static inline struct f_tree * |
62 | f_merge_items(struct f_tree *a, struct f_tree *b) | |
63 | { | |
64 | if (!a) return b; | |
65 | a->right->left = b; | |
66 | a->right = b->right; | |
67 | b->right = NULL; | |
68 | return a; | |
69 | } | |
92a72a4c | 70 | |
b8cc390e OZ |
71 | static inline struct f_tree * |
72 | f_new_pair_item(int fa, int ta, int fb, int tb) | |
73 | { | |
60566c5c OZ |
74 | check_u16(fa); |
75 | check_u16(ta); | |
76 | check_u16(fb); | |
77 | check_u16(tb); | |
78 | ||
79 | if ((ta < fa) || (tb < fb)) | |
80 | cf_error( "From value cannot be higher that To value in pair sets"); | |
81 | ||
b8cc390e OZ |
82 | struct f_tree *t = f_new_tree(); |
83 | t->right = t; | |
84 | t->from.type = t->to.type = T_PAIR; | |
85 | t->from.val.i = pair(fa, fb); | |
86 | t->to.val.i = pair(ta, tb); | |
87 | return t; | |
92a72a4c OZ |
88 | } |
89 | ||
b8cc390e OZ |
90 | static inline struct f_tree * |
91 | f_new_pair_set(int fa, int ta, int fb, int tb) | |
4fc36f39 | 92 | { |
60566c5c OZ |
93 | check_u16(fa); |
94 | check_u16(ta); | |
95 | check_u16(fb); | |
96 | check_u16(tb); | |
c454872f | 97 | |
b8cc390e OZ |
98 | if ((ta < fa) || (tb < fb)) |
99 | cf_error( "From value cannot be higher that To value in pair sets"); | |
c454872f | 100 | |
60566c5c OZ |
101 | struct f_tree *lst = NULL; |
102 | int i; | |
103 | ||
b8cc390e OZ |
104 | for (i = fa; i <= ta; i++) |
105 | lst = f_merge_items(lst, f_new_pair_item(i, i, fb, tb)); | |
106 | ||
107 | return lst; | |
4fc36f39 OF |
108 | } |
109 | ||
60566c5c | 110 | #define CC_ALL 0xFFFF |
42a0c054 | 111 | #define EC_ALL 0xFFFFFFFF |
60566c5c | 112 | #define LC_ALL 0xFFFFFFFF |
42a0c054 OZ |
113 | |
114 | static struct f_tree * | |
115 | f_new_ec_item(u32 kind, u32 ipv4_used, u32 key, u32 vf, u32 vt) | |
116 | { | |
117 | u64 fm, to; | |
118 | ||
e46128fb | 119 | if ((kind != EC_GENERIC) && (ipv4_used || (key >= 0x10000))) { |
42a0c054 OZ |
120 | check_u16(vf); |
121 | if (vt == EC_ALL) | |
122 | vt = 0xFFFF; | |
123 | else | |
124 | check_u16(vt); | |
125 | } | |
126 | ||
127 | if (kind == EC_GENERIC) { | |
128 | fm = ec_generic(key, vf); | |
129 | to = ec_generic(key, vt); | |
130 | } | |
131 | else if (ipv4_used) { | |
132 | fm = ec_ip4(kind, key, vf); | |
133 | to = ec_ip4(kind, key, vt); | |
134 | } | |
135 | else if (key < 0x10000) { | |
136 | fm = ec_as2(kind, key, vf); | |
137 | to = ec_as2(kind, key, vt); | |
138 | } | |
139 | else { | |
140 | fm = ec_as4(kind, key, vf); | |
141 | to = ec_as4(kind, key, vt); | |
142 | } | |
143 | ||
144 | struct f_tree *t = f_new_tree(); | |
145 | t->right = t; | |
146 | t->from.type = t->to.type = T_EC; | |
147 | t->from.val.ec = fm; | |
148 | t->to.val.ec = to; | |
149 | return t; | |
150 | } | |
151 | ||
60566c5c OZ |
152 | static struct f_tree * |
153 | f_new_lc_item(u32 f1, u32 t1, u32 f2, u32 t2, u32 f3, u32 t3) | |
154 | { | |
155 | struct f_tree *t = f_new_tree(); | |
156 | t->right = t; | |
157 | t->from.type = t->to.type = T_LC; | |
158 | t->from.val.lc = (lcomm) {f1, f2, f3}; | |
159 | t->to.val.lc = (lcomm) {t1, t2, t3}; | |
160 | return t; | |
161 | } | |
162 | ||
42a0c054 | 163 | static inline struct f_inst * |
5a14df39 | 164 | f_generate_empty(struct f_dynamic_attr dyn) |
5e173e9f | 165 | { |
9b46748d | 166 | struct f_val empty; |
42a0c054 | 167 | |
5a14df39 | 168 | switch (dyn.type & EAF_TYPE_MASK) { |
42a0c054 | 169 | case EAF_TYPE_AS_PATH: |
9b46748d | 170 | empty = f_const_empty_path; |
42a0c054 OZ |
171 | break; |
172 | case EAF_TYPE_INT_SET: | |
9b46748d | 173 | empty = f_const_empty_clist; |
42a0c054 OZ |
174 | break; |
175 | case EAF_TYPE_EC_SET: | |
9b46748d | 176 | empty = f_const_empty_eclist; |
42a0c054 | 177 | break; |
66dbdbd9 | 178 | case EAF_TYPE_LC_SET: |
9b46748d | 179 | empty = f_const_empty_lclist; |
66dbdbd9 | 180 | break; |
42a0c054 OZ |
181 | default: |
182 | cf_error("Can't empty that attribute"); | |
183 | } | |
184 | ||
a84b8b6e | 185 | return f_new_inst(FI_EA_SET, f_new_inst(FI_CONSTANT, empty), dyn); |
42a0c054 OZ |
186 | } |
187 | ||
9b0a0ba9 OZ |
188 | /* |
189 | * Remove all new lines and doubled whitespaces | |
190 | * and convert all tabulators to spaces | |
191 | * and return a copy of string | |
192 | */ | |
193 | char * | |
194 | assert_copy_expr(const char *start, size_t len) | |
195 | { | |
196 | /* XXX: Allocates maybe a little more memory than we really finally need */ | |
197 | char *str = cfg_alloc(len + 1); | |
198 | ||
199 | char *dst = str; | |
200 | const char *src = start - 1; | |
201 | const char *end = start + len; | |
202 | while (++src < end) | |
203 | { | |
204 | if (*src == '\n') | |
205 | continue; | |
206 | ||
207 | /* Skip doubled whitespaces */ | |
208 | if (src != start) | |
209 | { | |
210 | const char *prev = src - 1; | |
211 | if ((*src == ' ' || *src == '\t') && (*prev == ' ' || *prev == '\t')) | |
212 | continue; | |
213 | } | |
214 | ||
215 | if (*src == '\t') | |
216 | *dst = ' '; | |
217 | else | |
218 | *dst = *src; | |
219 | ||
220 | dst++; | |
221 | } | |
222 | *dst = '\0'; | |
223 | ||
224 | return str; | |
225 | } | |
226 | ||
227 | /* | |
228 | * assert_done - create f_instruction of bt_assert | |
229 | * @expr: expression in bt_assert() | |
230 | * @start: pointer to first char of test expression | |
231 | * @end: pointer to the last char of test expression | |
232 | */ | |
233 | static struct f_inst * | |
234 | assert_done(struct f_inst *expr, const char *start, const char *end) | |
235 | { | |
9b46748d MM |
236 | return f_new_inst(FI_ASSERT, expr, |
237 | (end >= start) ? | |
238 | assert_copy_expr(start, end - start + 1) | |
239 | : "???"); | |
9b0a0ba9 | 240 | } |
42a0c054 | 241 | |
c0e958e0 MM |
242 | static struct f_inst * |
243 | assert_assign(struct f_lval *lval, struct f_inst *expr, const char *start, const char *end) | |
244 | { | |
a84b8b6e | 245 | struct f_inst *setter, *getter, *checker; |
c0e958e0 MM |
246 | switch (lval->type) { |
247 | case F_LVAL_VARIABLE: | |
a84b8b6e | 248 | setter = f_new_inst(FI_VAR_SET, expr, lval->sym); |
96d757c1 | 249 | getter = f_new_inst(FI_VAR_GET, lval->sym); |
c0e958e0 MM |
250 | break; |
251 | case F_LVAL_PREFERENCE: | |
a84b8b6e | 252 | setter = f_new_inst(FI_PREF_SET, expr); |
c0e958e0 MM |
253 | getter = f_new_inst(FI_PREF_GET); |
254 | break; | |
255 | case F_LVAL_SA: | |
a84b8b6e | 256 | setter = f_new_inst(FI_RTA_SET, expr, lval->sa); |
c0e958e0 MM |
257 | getter = f_new_inst(FI_RTA_GET, lval->sa); |
258 | break; | |
259 | case F_LVAL_EA: | |
a84b8b6e | 260 | setter = f_new_inst(FI_EA_SET, expr, lval->da); |
c0e958e0 MM |
261 | getter = f_new_inst(FI_EA_GET, lval->da); |
262 | break; | |
a84b8b6e MM |
263 | default: |
264 | bug("Unknown lval type"); | |
c0e958e0 MM |
265 | } |
266 | ||
a84b8b6e | 267 | checker = f_new_inst(FI_EQ, expr, getter); |
4f082dfa | 268 | setter->next = checker; |
a84b8b6e | 269 | |
c0e958e0 MM |
270 | return assert_done(setter, start, end); |
271 | } | |
272 | ||
b9d70dc8 PM |
273 | CF_DECLS |
274 | ||
e4a73dbf | 275 | CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN, |
82bfee76 | 276 | ACCEPT, REJECT, ERROR, |
8c9986d3 | 277 | INT, BOOL, IP, TYPE, PREFIX, RD, PAIR, QUAD, EC, LC, |
66dbdbd9 | 278 | SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST, LCLIST, |
7db7b7db | 279 | IF, THEN, ELSE, CASE, |
42a0c054 | 280 | TRUE, FALSE, RT, RO, UNKNOWN, GENERIC, |
e5468d16 | 281 | FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS, |
a5fc5958 | 282 | PREFERENCE, |
ff2ca10c | 283 | ROA_CHECK, ASN, SRC, DST, |
61e501da | 284 | IS_V4, IS_V6, |
e58f8c28 | 285 | LEN, MAXLEN, |
f4536657 | 286 | DEFINED, |
7f77e250 | 287 | ADD, DELETE, CONTAINS, RESET, |
9c9cc35c | 288 | PREPEND, FIRST, LAST, LAST_NONAGGREGATED, MATCH, |
afc54517 | 289 | EMPTY, |
265419a3 | 290 | FILTER, WHERE, EVAL, ATTRIBUTE, |
2c137591 | 291 | BT_ASSERT, BT_TEST_SUITE, BT_CHECK_ASSIGN, BT_TEST_SAME, FORMAT, STACKS) |
b9d70dc8 | 292 | |
f4536657 | 293 | %nonassoc THEN |
4ed8718a | 294 | %nonassoc ELSE |
f4536657 | 295 | |
dfe63ed8 | 296 | %type <xp> cmds_int cmd_prep |
0206c070 | 297 | %type <x> term block cmd cmds constant constructor print_list var_list function_call symbol_value bgp_path_expr bgp_path bgp_path_tail |
5a14df39 MJM |
298 | %type <fda> dynamic_attr |
299 | %type <fsa> static_attr | |
0b39b1cb | 300 | %type <f> filter where_filter |
96d757c1 | 301 | %type <fl> filter_body function_body |
c0e958e0 | 302 | %type <flv> lvalue |
c29d73a0 | 303 | %type <i> type function_args function_vars |
9b46748d MM |
304 | %type <ecs> ec_kind |
305 | %type <fret> break_command | |
60566c5c OZ |
306 | %type <i32> cnum |
307 | %type <e> pair_item ec_item lc_item set_item switch_item set_items switch_items switch_body | |
b1a597e0 | 308 | %type <trie> fprefix_set |
5e173e9f JMM |
309 | %type <v> set_atom switch_atom fipa |
310 | %type <px> fprefix | |
9b0a0ba9 | 311 | %type <t> get_cf_position |
b9d70dc8 PM |
312 | |
313 | CF_GRAMMAR | |
314 | ||
2c137591 MM |
315 | conf: FILTER STACKS expr expr ';' { |
316 | new_config->filter_vstk = $3; | |
317 | new_config->filter_estk = $4; | |
318 | } | |
319 | ; | |
320 | ||
f851f0d7 | 321 | conf: filter_def ; |
e0f2e42f | 322 | filter_def: |
2de1e206 | 323 | FILTER symbol { $2 = cf_define_symbol($2, SYM_FILTER, filter, NULL); cf_push_scope( $2 ); } |
b2b7bbfc | 324 | filter_body { |
0b39b1cb | 325 | struct filter *f = cfg_alloc(sizeof(struct filter)); |
f249d0b8 | 326 | *f = (struct filter) { .sym = $2, .root = $4 }; |
0b39b1cb MM |
327 | $2->filter = f; |
328 | ||
ae3e1af2 | 329 | cf_pop_scope(); |
b9d70dc8 PM |
330 | } |
331 | ; | |
332 | ||
f851f0d7 | 333 | conf: filter_eval ; |
1c20608e | 334 | filter_eval: |
23e3b1e6 | 335 | EVAL term { f_eval_int(f_linearize($2)); } |
1c20608e MM |
336 | ; |
337 | ||
265419a3 | 338 | conf: custom_attr ; |
2de1e206 | 339 | custom_attr: ATTRIBUTE type symbol ';' { |
0b39b1cb | 340 | cf_define_symbol($3, SYM_ATTRIBUTE, attribute, ca_lookup(new_config->pool, $3->name, $2)->fda); |
265419a3 MM |
341 | }; |
342 | ||
f851f0d7 | 343 | conf: bt_test_suite ; |
9b0a0ba9 | 344 | bt_test_suite: |
9eef9c64 MM |
345 | BT_TEST_SUITE '(' CF_SYM_KNOWN ',' text ')' { |
346 | cf_assert_symbol($3, SYM_FUNCTION); | |
132529ce | 347 | struct f_bt_test_suite *t = cfg_allocz(sizeof(struct f_bt_test_suite)); |
0b39b1cb | 348 | t->fn = $3->function; |
9b0a0ba9 OZ |
349 | t->fn_name = $3->name; |
350 | t->dsc = $5; | |
351 | ||
352 | add_tail(&new_config->tests, &t->n); | |
353 | } | |
354 | ; | |
355 | ||
132529ce MM |
356 | conf: bt_test_same ; |
357 | bt_test_same: | |
9eef9c64 MM |
358 | BT_TEST_SAME '(' CF_SYM_KNOWN ',' CF_SYM_KNOWN ',' NUM ')' { |
359 | cf_assert_symbol($3, SYM_FUNCTION); | |
360 | cf_assert_symbol($5, SYM_FUNCTION); | |
132529ce | 361 | struct f_bt_test_suite *t = cfg_allocz(sizeof(struct f_bt_test_suite)); |
0b39b1cb MM |
362 | t->fn = $3->function; |
363 | t->cmp = $5->function; | |
132529ce MM |
364 | t->result = $7; |
365 | t->fn_name = $3->name; | |
366 | t->dsc = $5->name; | |
367 | add_tail(&new_config->tests, &t->n); | |
368 | } | |
369 | ; | |
370 | ||
ba921648 PM |
371 | type: |
372 | INT { $$ = T_INT; } | |
373 | | BOOL { $$ = T_BOOL; } | |
374 | | IP { $$ = T_IP; } | |
8c9986d3 | 375 | | RD { $$ = T_RD; } |
5e173e9f | 376 | | PREFIX { $$ = T_NET; } |
ba921648 | 377 | | PAIR { $$ = T_PAIR; } |
126683fe | 378 | | QUAD { $$ = T_QUAD; } |
42a0c054 | 379 | | EC { $$ = T_EC; } |
66dbdbd9 | 380 | | LC { $$ = T_LC; } |
ba921648 | 381 | | STRING { $$ = T_STRING; } |
10a53608 PM |
382 | | BGPMASK { $$ = T_PATH_MASK; } |
383 | | BGPPATH { $$ = T_PATH; } | |
384 | | CLIST { $$ = T_CLIST; } | |
42a0c054 | 385 | | ECLIST { $$ = T_ECLIST; } |
66dbdbd9 | 386 | | LCLIST { $$ = T_LCLIST; } |
c8cafc8e | 387 | | type SET { |
ba921648 | 388 | switch ($1) { |
b1a597e0 | 389 | case T_INT: |
b1a597e0 | 390 | case T_PAIR: |
126683fe | 391 | case T_QUAD: |
42a0c054 | 392 | case T_EC: |
66dbdbd9 | 393 | case T_LC: |
83715aa8 | 394 | case T_RD: |
126683fe | 395 | case T_IP: |
b1a597e0 OZ |
396 | $$ = T_SET; |
397 | break; | |
398 | ||
5e173e9f | 399 | case T_NET: |
b1a597e0 OZ |
400 | $$ = T_PREFIX_SET; |
401 | break; | |
402 | ||
ba921648 | 403 | default: |
a5a947d4 | 404 | cf_error( "You can't create sets of this type." ); |
ba921648 | 405 | } |
b1a597e0 | 406 | } |
ba921648 PM |
407 | ; |
408 | ||
c29d73a0 MM |
409 | function_argsn: |
410 | /* EMPTY */ | |
2de1e206 | 411 | | function_argsn type symbol ';' { |
c29d73a0 MM |
412 | if ($3->scope->slots >= 0xfe) cf_error("Too many declarations, at most 255 allowed"); |
413 | cf_define_symbol($3, SYM_VARIABLE | $2, offset, $3->scope->slots++); | |
414 | } | |
6dc7a0cb PM |
415 | ; |
416 | ||
c29d73a0 MM |
417 | function_args: |
418 | '(' ')' { $$ = 0; } | |
2de1e206 | 419 | | '(' function_argsn type symbol ')' { |
63e76204 MM |
420 | cf_define_symbol($4, SYM_VARIABLE | $3, offset, $4->scope->slots++); |
421 | $$ = $4->scope->slots; | |
e0f2e42f MM |
422 | } |
423 | ; | |
424 | ||
c29d73a0 MM |
425 | function_vars: |
426 | /* EMPTY */ { $$ = 0; } | |
2de1e206 | 427 | | function_vars type symbol ';' { |
c29d73a0 MM |
428 | cf_define_symbol($3, SYM_VARIABLE | $2, offset, $3->scope->slots++); |
429 | $$ = $1 + 1; | |
430 | } | |
431 | ; | |
432 | ||
63e76204 | 433 | filter_body: function_body ; |
96d757c1 | 434 | |
e0f2e42f | 435 | filter: |
9eef9c64 MM |
436 | CF_SYM_KNOWN { |
437 | cf_assert_symbol($1, SYM_FILTER); | |
0b39b1cb MM |
438 | $$ = $1->filter; |
439 | } | |
440 | | filter_body { | |
441 | struct filter *f = cfg_alloc(sizeof(struct filter)); | |
442 | *f = (struct filter) { .root = $1 }; | |
443 | $$ = f; | |
e0f2e42f | 444 | } |
e0f2e42f MM |
445 | ; |
446 | ||
430da60f MM |
447 | where_filter: |
448 | WHERE term { | |
224b77d4 | 449 | /* Construct 'IF term THEN { ACCEPT; } ELSE { REJECT; }' */ |
9b46748d | 450 | $$ = f_new_where($2); |
4c553c5a | 451 | } |
430da60f MM |
452 | ; |
453 | ||
ba921648 | 454 | function_body: |
c29d73a0 | 455 | function_vars '{' cmds '}' { |
23e3b1e6 | 456 | $$ = f_linearize($3); |
63e76204 | 457 | $$->vars = $1; |
84c7e194 | 458 | } |
ba921648 PM |
459 | ; |
460 | ||
f851f0d7 | 461 | conf: function_def ; |
ba921648 | 462 | function_def: |
2de1e206 | 463 | FUNCTION symbol { DBG( "Beginning of function %s\n", $2->name ); |
0b39b1cb | 464 | $2 = cf_define_symbol($2, SYM_FUNCTION, function, NULL); |
bf3eb98e | 465 | cf_push_scope($2); |
c29d73a0 MM |
466 | } function_args function_body { |
467 | DBG("Definition of function %s with %u args and %u local vars.\n", $2->name, $4, $5->vars); | |
96d757c1 JMM |
468 | $5->args = $4; |
469 | $2->function = $5; | |
ae3e1af2 | 470 | cf_pop_scope(); |
ba921648 PM |
471 | } |
472 | ; | |
473 | ||
474 | /* Programs */ | |
475 | ||
476 | cmds: /* EMPTY */ { $$ = NULL; } | |
0206c070 | 477 | | cmds_int { $$ = $1.begin; } |
5f47c4c1 OZ |
478 | ; |
479 | ||
dfe63ed8 | 480 | cmd_prep: cmd { |
0206c070 | 481 | $$.begin = $$.end = $1; |
dfe63ed8 MM |
482 | if ($1) |
483 | while ($$.end->next) | |
484 | $$.end = $$.end->next; | |
485 | } | |
486 | ; | |
487 | ||
488 | cmds_int: cmd_prep | |
489 | | cmds_int cmd_prep { | |
490 | if (!$1.begin) | |
491 | $$ = $2; | |
492 | else if (!$2.begin) | |
493 | $$ = $1; | |
494 | else { | |
495 | $$.begin = $1.begin; | |
496 | $$.end = $2.end; | |
497 | $1.end->next = $2.begin; | |
0206c070 | 498 | } |
0206c070 | 499 | } |
84c7e194 PM |
500 | ; |
501 | ||
2575593e | 502 | block: |
ba921648 | 503 | cmd { |
2575593e PM |
504 | $$=$1; |
505 | } | |
506 | | '{' cmds '}' { | |
507 | $$=$2; | |
508 | } | |
509 | ; | |
510 | ||
d3dd620b PM |
511 | /* |
512 | * Complex types, their bison value is struct f_val | |
513 | */ | |
e3f2d5fc | 514 | fipa: |
04632fd7 OZ |
515 | IP4 %prec PREFIX_DUMMY { $$.type = T_IP; $$.val.ip = ipa_from_ip4($1); } |
516 | | IP6 %prec PREFIX_DUMMY { $$.type = T_IP; $$.val.ip = ipa_from_ip6($1); } | |
d3dd620b PM |
517 | ; |
518 | ||
b8cc390e OZ |
519 | |
520 | ||
521 | /* | |
522 | * Set constants. They are also used in switch cases. We use separate | |
523 | * nonterminals for switch (set_atom/switch_atom, set_item/switch_item ...) | |
524 | * to elude a collision between symbol (in expr) in set_atom and symbol | |
525 | * as a function call in switch case cmds. | |
526 | */ | |
527 | ||
38506f71 | 528 | set_atom: |
83715aa8 OZ |
529 | NUM { $$.type = T_INT; $$.val.i = $1; } |
530 | | fipa { $$ = $1; } | |
531 | | VPN_RD { $$.type = T_RD; $$.val.ec = $1; } | |
532 | | ENUM { $$.type = pair_a($1); $$.val.i = pair_b($1); } | |
b2f00837 | 533 | | '(' term ')' { |
23e3b1e6 | 534 | if (f_eval(f_linearize($2), cfg_mem, &($$)) > F_RETURN) cf_error("Runtime error"); |
b2f00837 OZ |
535 | if (!f_valid_set_type($$.type)) cf_error("Set-incompatible type"); |
536 | } | |
9eef9c64 MM |
537 | | CF_SYM_KNOWN { |
538 | cf_assert_symbol($1, SYM_CONSTANT); | |
b2f00837 | 539 | if (!f_valid_set_type(SYM_TYPE($1))) cf_error("%s: set-incompatible type", $1->name); |
0b39b1cb | 540 | $$ = *$1->val; |
b2f00837 | 541 | } |
b8cc390e | 542 | ; |
38506f71 | 543 | |
b8cc390e OZ |
544 | switch_atom: |
545 | NUM { $$.type = T_INT; $$.val.i = $1; } | |
23e3b1e6 | 546 | | '(' term ')' { $$.type = T_INT; $$.val.i = f_eval_int(f_linearize($2)); } |
b8cc390e OZ |
547 | | fipa { $$ = $1; } |
548 | | ENUM { $$.type = pair_a($1); $$.val.i = pair_b($1); } | |
549 | ; | |
550 | ||
60566c5c | 551 | cnum: |
23e3b1e6 | 552 | term { $$ = f_eval_int(f_linearize($1)); } |
b8cc390e OZ |
553 | |
554 | pair_item: | |
60566c5c OZ |
555 | '(' cnum ',' cnum ')' { $$ = f_new_pair_item($2, $2, $4, $4); } |
556 | | '(' cnum ',' cnum DDOT cnum ')' { $$ = f_new_pair_item($2, $2, $4, $6); } | |
557 | | '(' cnum ',' '*' ')' { $$ = f_new_pair_item($2, $2, 0, CC_ALL); } | |
558 | | '(' cnum DDOT cnum ',' cnum ')' { $$ = f_new_pair_set($2, $4, $6, $6); } | |
559 | | '(' cnum DDOT cnum ',' cnum DDOT cnum ')' { $$ = f_new_pair_set($2, $4, $6, $8); } | |
560 | | '(' cnum DDOT cnum ',' '*' ')' { $$ = f_new_pair_item($2, $4, 0, CC_ALL); } | |
561 | | '(' '*' ',' cnum ')' { $$ = f_new_pair_set(0, CC_ALL, $4, $4); } | |
562 | | '(' '*' ',' cnum DDOT cnum ')' { $$ = f_new_pair_set(0, CC_ALL, $4, $6); } | |
563 | | '(' '*' ',' '*' ')' { $$ = f_new_pair_item(0, CC_ALL, 0, CC_ALL); } | |
564 | | '(' cnum ',' cnum ')' DDOT '(' cnum ',' cnum ')' | |
565 | { $$ = f_new_pair_item($2, $8, $4, $10); } | |
38506f71 PM |
566 | ; |
567 | ||
42a0c054 OZ |
568 | ec_kind: |
569 | RT { $$ = EC_RT; } | |
570 | | RO { $$ = EC_RO; } | |
571 | | UNKNOWN NUM { $$ = $2; } | |
572 | | GENERIC { $$ = EC_GENERIC; } | |
573 | ; | |
574 | ||
575 | ec_item: | |
60566c5c OZ |
576 | '(' ec_kind ',' cnum ',' cnum ')' { $$ = f_new_ec_item($2, 0, $4, $6, $6); } |
577 | | '(' ec_kind ',' cnum ',' cnum DDOT cnum ')' { $$ = f_new_ec_item($2, 0, $4, $6, $8); } | |
578 | | '(' ec_kind ',' cnum ',' '*' ')' { $$ = f_new_ec_item($2, 0, $4, 0, EC_ALL); } | |
42a0c054 OZ |
579 | ; |
580 | ||
60566c5c OZ |
581 | lc_item: |
582 | '(' cnum ',' cnum ',' cnum ')' { $$ = f_new_lc_item($2, $2, $4, $4, $6, $6); } | |
583 | | '(' cnum ',' cnum ',' cnum DDOT cnum ')' { $$ = f_new_lc_item($2, $2, $4, $4, $6, $8); } | |
584 | | '(' cnum ',' cnum ',' '*' ')' { $$ = f_new_lc_item($2, $2, $4, $4, 0, LC_ALL); } | |
585 | | '(' cnum ',' cnum DDOT cnum ',' '*' ')' { $$ = f_new_lc_item($2, $2, $4, $6, 0, LC_ALL); } | |
586 | | '(' cnum ',' '*' ',' '*' ')' { $$ = f_new_lc_item($2, $2, 0, LC_ALL, 0, LC_ALL); } | |
587 | | '(' cnum DDOT cnum ',' '*' ',' '*' ')' { $$ = f_new_lc_item($2, $4, 0, LC_ALL, 0, LC_ALL); } | |
588 | | '(' '*' ',' '*' ',' '*' ')' { $$ = f_new_lc_item(0, LC_ALL, 0, LC_ALL, 0, LC_ALL); } | |
589 | | '(' cnum ',' cnum ',' cnum ')' DDOT '(' cnum ',' cnum ',' cnum ')' | |
590 | { $$ = f_new_lc_item($2, $10, $4, $12, $6, $14); } | |
591 | ; | |
42a0c054 | 592 | |
b8cc390e OZ |
593 | set_item: |
594 | pair_item | |
42a0c054 | 595 | | ec_item |
60566c5c | 596 | | lc_item |
b8cc390e OZ |
597 | | set_atom { $$ = f_new_item($1, $1); } |
598 | | set_atom DDOT set_atom { $$ = f_new_item($1, $3); } | |
599 | ; | |
600 | ||
601 | switch_item: | |
602 | pair_item | |
42a0c054 | 603 | | ec_item |
60566c5c | 604 | | lc_item |
b8cc390e OZ |
605 | | switch_atom { $$ = f_new_item($1, $1); } |
606 | | switch_atom DDOT switch_atom { $$ = f_new_item($1, $3); } | |
607 | ; | |
608 | ||
38506f71 | 609 | set_items: |
b8cc390e OZ |
610 | set_item |
611 | | set_items ',' set_item { $$ = f_merge_items($1, $3); } | |
612 | ; | |
613 | ||
614 | switch_items: | |
615 | switch_item | |
616 | | switch_items ',' switch_item { $$ = f_merge_items($1, $3); } | |
38506f71 PM |
617 | ; |
618 | ||
b1a597e0 | 619 | fprefix: |
04632fd7 OZ |
620 | net_ip_ { $$.net = $1; $$.lo = $1.pxlen; $$.hi = $1.pxlen; } |
621 | | net_ip_ '+' { $$.net = $1; $$.lo = $1.pxlen; $$.hi = net_max_prefix_length[$1.type]; } | |
622 | | net_ip_ '-' { $$.net = $1; $$.lo = 0; $$.hi = $1.pxlen; } | |
623 | | net_ip_ '{' NUM ',' NUM '}' { | |
5e173e9f | 624 | $$.net = $1; $$.lo = $3; $$.hi = $5; |
6aaaa635 OZ |
625 | if (($3 > $5) || ($5 > net_max_prefix_length[$1.type])) |
626 | cf_error("Invalid prefix pattern range: {%u, %u}", $3, $5); | |
b1a597e0 OZ |
627 | } |
628 | ; | |
629 | ||
630 | fprefix_set: | |
27550028 OZ |
631 | fprefix { $$ = f_new_trie(cfg_mem, 0); trie_add_prefix($$, &($1.net), $1.lo, $1.hi); } |
632 | | fprefix_set ',' fprefix { $$ = $1; if (!trie_add_prefix($$, &($3.net), $3.lo, $3.hi)) cf_error("Mixed IPv4/IPv6 prefixes in prefix set"); } | |
b1a597e0 OZ |
633 | ; |
634 | ||
41be4444 | 635 | switch_body: /* EMPTY */ { $$ = NULL; } |
b8cc390e OZ |
636 | | switch_body switch_items ':' cmds { |
637 | /* Fill data fields */ | |
638 | struct f_tree *t; | |
23e3b1e6 | 639 | struct f_line *line = f_linearize($4); |
b8cc390e | 640 | for (t = $2; t; t = t->left) |
4c553c5a | 641 | t->data = line; |
b8cc390e | 642 | $$ = f_merge_items($1, $2); |
41be4444 | 643 | } |
5e173e9f | 644 | | switch_body ELSECOL cmds { |
b8cc390e OZ |
645 | struct f_tree *t = f_new_tree(); |
646 | t->from.type = t->to.type = T_VOID; | |
647 | t->right = t; | |
23e3b1e6 | 648 | t->data = f_linearize($3); |
b8cc390e OZ |
649 | $$ = f_merge_items($1, t); |
650 | } | |
41be4444 | 651 | ; |
d3dd620b | 652 | |
92a72a4c | 653 | bgp_path_expr: |
c0e958e0 | 654 | symbol_value { $$ = $1; } |
92a72a4c OZ |
655 | | '(' term ')' { $$ = $2; } |
656 | ; | |
657 | ||
f9491630 | 658 | bgp_path: |
3e52d112 | 659 | PO bgp_path_tail PC { $$ = $2; } |
f9491630 OZ |
660 | ; |
661 | ||
3e52d112 | 662 | bgp_path_tail: |
4f082dfa MM |
663 | NUM bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .asn = $1, .kind = PM_ASN, }, }); $$->next = $2; } |
664 | | NUM DDOT NUM bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .from = $1, .to = $3, .kind = PM_ASN_RANGE }, }); $$->next = $4; } | |
ef113c6f OZ |
665 | | '[' set_items ']' bgp_path_tail { |
666 | if ($2->from.type != T_INT) cf_error("Only integer sets allowed in path mask"); | |
667 | $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .set = build_tree($2), .kind = PM_ASN_SET }, }); $$->next = $4; | |
668 | } | |
4f082dfa MM |
669 | | '*' bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .kind = PM_ASTERISK }, }); $$->next = $2; } |
670 | | '?' bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .kind = PM_QUESTION }, }); $$->next = $2; } | |
ec430a7f | 671 | | '+' bgp_path_tail { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PATH_MASK_ITEM, .val.pmi = { .kind = PM_LOOP }, }); $$->next = $2; } |
4f082dfa | 672 | | bgp_path_expr bgp_path_tail { $$ = $1; $$->next = $2; } |
122deb6d | 673 | | { $$ = NULL; } |
f9491630 | 674 | ; |
77de6882 | 675 | |
23b1539b | 676 | constant: |
9b46748d MM |
677 | NUM { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_INT, .val.i = $1, }); } |
678 | | TRUE { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_BOOL, .val.i = 1, }); } | |
679 | | FALSE { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_BOOL, .val.i = 0, }); } | |
680 | | TEXT { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_STRING, .val.s = $1, }); } | |
681 | | fipa { $$ = f_new_inst(FI_CONSTANT, $1); } | |
682 | | VPN_RD { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_RD, .val.ec = $1, }); } | |
683 | | net_ { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_NET, .val.net = $1, }); } | |
ca2ee91a MM |
684 | | '[' set_items ']' { |
685 | DBG( "We've got a set here..." ); | |
9b46748d | 686 | $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_SET, .val.t = build_tree($2), }); |
ca2ee91a MM |
687 | DBG( "ook\n" ); |
688 | } | |
9b46748d MM |
689 | | '[' fprefix_set ']' { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_PREFIX_SET, .val.ti = $2, }); } |
690 | | ENUM { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = $1 >> 16, .val.i = $1 & 0xffff, }); } | |
23b1539b PM |
691 | ; |
692 | ||
42a0c054 | 693 | constructor: |
9b46748d MM |
694 | '(' term ',' term ')' { $$ = f_new_inst(FI_PAIR_CONSTRUCT, $2, $4); } |
695 | | '(' ec_kind ',' term ',' term ')' { $$ = f_new_inst(FI_EC_CONSTRUCT, $4, $6, $2); } | |
696 | | '(' term ',' term ',' term ')' { $$ = f_new_inst(FI_LC_CONSTRUCT, $2, $4, $6); } | |
c0999a14 | 697 | | bgp_path { $$ = f_new_inst(FI_PATHMASK_CONSTRUCT, $1); } |
42a0c054 OZ |
698 | ; |
699 | ||
92a72a4c | 700 | |
96d757c1 JMM |
701 | /* This generates the function_call variable list backwards. */ |
702 | var_list: /* EMPTY */ { $$ = NULL; } | |
703 | | term { $$ = $1; } | |
704 | | var_list ',' term { $$ = $3; $$->next = $1; } | |
705 | ||
2d496d20 | 706 | function_call: |
9eef9c64 | 707 | CF_SYM_KNOWN '(' var_list ')' { |
96d757c1 JMM |
708 | if ($1->class != SYM_FUNCTION) |
709 | cf_error("You can't call something which is not a function. Really."); | |
710 | ||
711 | struct f_inst *fc = f_new_inst(FI_CALL, $1); | |
712 | uint args = 0; | |
713 | while ($3) { | |
714 | args++; | |
715 | struct f_inst *tmp = $3->next; | |
716 | $3->next = fc; | |
717 | ||
718 | fc = $3; | |
719 | $3 = tmp; | |
720 | } | |
721 | ||
722 | if (args != $1->function->args) | |
723 | cf_error("Function call '%s' got %u arguments, need %u arguments.", | |
724 | $1->name, args, $1->function->args); | |
725 | ||
726 | $$ = f_new_inst(FI_CONSTANT, (struct f_val) { .type = T_VOID }); | |
727 | $$->next = fc; | |
2d496d20 PM |
728 | } |
729 | ; | |
730 | ||
9eef9c64 MM |
731 | symbol_value: CF_SYM_KNOWN |
732 | { | |
733 | switch ($1->class) { | |
734 | case SYM_CONSTANT_RANGE: | |
30667d50 | 735 | $$ = f_new_inst(FI_CONSTANT, *($1->val)); |
96d757c1 | 736 | break; |
9eef9c64 | 737 | case SYM_VARIABLE_RANGE: |
96d757c1 | 738 | $$ = f_new_inst(FI_VAR_GET, $1); |
9eef9c64 MM |
739 | break; |
740 | case SYM_ATTRIBUTE: | |
741 | $$ = f_new_inst(FI_EA_GET, *$1->attribute); | |
742 | break; | |
743 | default: | |
744 | cf_error("Can't get value of symbol %s", $1->name); | |
745 | } | |
746 | } | |
c0e958e0 | 747 | ; |
92a72a4c | 748 | |
2bdb5e00 | 749 | static_attr: |
4c553c5a MM |
750 | FROM { $$ = f_new_static_attr(T_IP, SA_FROM, 0); } |
751 | | GW { $$ = f_new_static_attr(T_IP, SA_GW, 0); } | |
752 | | NET { $$ = f_new_static_attr(T_NET, SA_NET, 1); } | |
753 | | PROTO { $$ = f_new_static_attr(T_STRING, SA_PROTO, 1); } | |
754 | | SOURCE { $$ = f_new_static_attr(T_ENUM_RTS, SA_SOURCE, 1); } | |
755 | | SCOPE { $$ = f_new_static_attr(T_ENUM_SCOPE, SA_SCOPE, 0); } | |
756 | | DEST { $$ = f_new_static_attr(T_ENUM_RTD, SA_DEST, 0); } | |
757 | | IFNAME { $$ = f_new_static_attr(T_STRING, SA_IFNAME, 0); } | |
758 | | IFINDEX { $$ = f_new_static_attr(T_INT, SA_IFINDEX, 1); } | |
8cc5bb09 | 759 | | WEIGHT { $$ = f_new_static_attr(T_INT, SA_WEIGHT, 0); } |
e5468d16 | 760 | | GW_MPLS { $$ = f_new_static_attr(T_INT, SA_GW_MPLS, 0); } |
2bdb5e00 PM |
761 | ; |
762 | ||
84c7e194 | 763 | term: |
5a14df39 | 764 | '(' term ')' { $$ = $2; } |
9b46748d MM |
765 | | term '+' term { $$ = f_new_inst(FI_ADD, $1, $3); } |
766 | | term '-' term { $$ = f_new_inst(FI_SUBTRACT, $1, $3); } | |
767 | | term '*' term { $$ = f_new_inst(FI_MULTIPLY, $1, $3); } | |
768 | | term '/' term { $$ = f_new_inst(FI_DIVIDE, $1, $3); } | |
769 | | term AND term { $$ = f_new_inst(FI_AND, $1, $3); } | |
770 | | term OR term { $$ = f_new_inst(FI_OR, $1, $3); } | |
771 | | term '=' term { $$ = f_new_inst(FI_EQ, $1, $3); } | |
772 | | term NEQ term { $$ = f_new_inst(FI_NEQ, $1, $3); } | |
773 | | term '<' term { $$ = f_new_inst(FI_LT, $1, $3); } | |
774 | | term LEQ term { $$ = f_new_inst(FI_LTE, $1, $3); } | |
775 | | term '>' term { $$ = f_new_inst(FI_LT, $3, $1); } | |
776 | | term GEQ term { $$ = f_new_inst(FI_LTE, $3, $1); } | |
777 | | term '~' term { $$ = f_new_inst(FI_MATCH, $1, $3); } | |
778 | | term NMA term { $$ = f_new_inst(FI_NOT_MATCH, $1, $3); } | |
779 | | '!' term { $$ = f_new_inst(FI_NOT, $2); } | |
780 | | DEFINED '(' term ')' { $$ = f_new_inst(FI_DEFINED, $3); } | |
23b1539b | 781 | |
c0e958e0 | 782 | | symbol_value { $$ = $1; } |
1183b6b2 | 783 | | constant { $$ = $1; } |
42a0c054 | 784 | | constructor { $$ = $1; } |
4515bdba | 785 | |
5a14df39 | 786 | | PREFERENCE { $$ = f_new_inst(FI_PREF_GET); } |
2bdb5e00 | 787 | |
c0e958e0 | 788 | | static_attr { $$ = f_new_inst(FI_RTA_GET, $1); } |
fe613ecd | 789 | |
c0e958e0 | 790 | | dynamic_attr { $$ = f_new_inst(FI_EA_GET, $1); } |
36bbfc70 | 791 | |
9b46748d MM |
792 | | term '.' IS_V4 { $$ = f_new_inst(FI_IS_V4, $1); } |
793 | | term '.' TYPE { $$ = f_new_inst(FI_TYPE, $1); } | |
794 | | term '.' IP { $$ = f_new_inst(FI_IP, $1); } | |
795 | | term '.' RD { $$ = f_new_inst(FI_ROUTE_DISTINGUISHER, $1); } | |
796 | | term '.' LEN { $$ = f_new_inst(FI_LENGTH, $1); } | |
797 | | term '.' MAXLEN { $$ = f_new_inst(FI_ROA_MAXLEN, $1); } | |
798 | | term '.' ASN { $$ = f_new_inst(FI_ROA_ASN, $1); } | |
ff2ca10c OZ |
799 | | term '.' SRC { $$ = f_new_inst(FI_NET_SRC, $1); } |
800 | | term '.' DST { $$ = f_new_inst(FI_NET_DST, $1); } | |
9b46748d MM |
801 | | term '.' MASK '(' term ')' { $$ = f_new_inst(FI_IP_MASK, $1, $5); } |
802 | | term '.' FIRST { $$ = f_new_inst(FI_AS_PATH_FIRST, $1); } | |
803 | | term '.' LAST { $$ = f_new_inst(FI_AS_PATH_LAST, $1); } | |
804 | | term '.' LAST_NONAGGREGATED { $$ = f_new_inst(FI_AS_PATH_LAST_NAG, $1); } | |
7f77e250 PM |
805 | |
806 | /* Communities */ | |
10a53608 | 807 | /* This causes one shift/reduce conflict |
c0e958e0 MM |
808 | | dynamic_attr '.' ADD '(' term ')' { } |
809 | | dynamic_attr '.' DELETE '(' term ')' { } | |
810 | | dynamic_attr '.' CONTAINS '(' term ')' { } | |
811 | | dynamic_attr '.' RESET{ } | |
10a53608 | 812 | */ |
7f77e250 | 813 | |
9b46748d MM |
814 | | '+' EMPTY '+' { $$ = f_new_inst(FI_CONSTANT, f_const_empty_path); } |
815 | | '-' EMPTY '-' { $$ = f_new_inst(FI_CONSTANT, f_const_empty_clist); } | |
816 | | '-' '-' EMPTY '-' '-' { $$ = f_new_inst(FI_CONSTANT, f_const_empty_eclist); } | |
817 | | '-' '-' '-' EMPTY '-' '-' '-' { $$ = f_new_inst(FI_CONSTANT, f_const_empty_lclist); } | |
818 | | PREPEND '(' term ',' term ')' { $$ = f_new_inst(FI_PATH_PREPEND, $3, $5); } | |
819 | | ADD '(' term ',' term ')' { $$ = f_new_inst(FI_CLIST_ADD, $3, $5); } | |
820 | | DELETE '(' term ',' term ')' { $$ = f_new_inst(FI_CLIST_DEL, $3, $5); } | |
821 | | FILTER '(' term ',' term ')' { $$ = f_new_inst(FI_CLIST_FILTER, $3, $5); } | |
afc54517 | 822 | |
9b46748d MM |
823 | | ROA_CHECK '(' rtable ')' { $$ = f_new_inst(FI_ROA_CHECK_IMPLICIT, $3); } |
824 | | ROA_CHECK '(' rtable ',' term ',' term ')' { $$ = f_new_inst(FI_ROA_CHECK_EXPLICIT, $5, $7, $3); } | |
af582c48 | 825 | |
9b46748d | 826 | | FORMAT '(' term ')' { $$ = f_new_inst(FI_FORMAT, $3); } |
9b0a0ba9 | 827 | |
a2d15746 | 828 | /* | term '.' LEN { $$->code = P('P','l'); } */ |
7f77e250 | 829 | |
4c553c5a | 830 | | function_call |
ba921648 PM |
831 | ; |
832 | ||
833 | break_command: | |
82bfee76 | 834 | ACCEPT { $$ = F_ACCEPT; } |
03e3d184 MM |
835 | | REJECT { $$ = F_REJECT; } |
836 | | ERROR { $$ = F_ERROR; } | |
ba921648 PM |
837 | ; |
838 | ||
23b1539b | 839 | print_list: /* EMPTY */ { $$ = NULL; } |
0206c070 MM |
840 | | term { $$ = $1; } |
841 | | term ',' print_list { | |
842 | ASSERT($1); | |
843 | ASSERT($1->next == NULL); | |
844 | $1->next = $3; | |
845 | $$ = $1; | |
23b1539b PM |
846 | } |
847 | ; | |
848 | ||
849 | cmd: | |
49955645 | 850 | IF term THEN block { |
9b46748d | 851 | $$ = f_new_inst(FI_CONDITION, $2, $4, NULL); |
23b1539b | 852 | } |
49955645 | 853 | | IF term THEN block ELSE block { |
9b46748d | 854 | $$ = f_new_inst(FI_CONDITION, $2, $4, $6); |
23b1539b | 855 | } |
9eef9c64 MM |
856 | | CF_SYM_KNOWN '=' term ';' { |
857 | switch ($1->class) { | |
858 | case SYM_VARIABLE_RANGE: | |
a84b8b6e | 859 | $$ = f_new_inst(FI_VAR_SET, $3, $1); |
9eef9c64 MM |
860 | break; |
861 | case SYM_ATTRIBUTE: | |
a84b8b6e | 862 | $$ = f_new_inst(FI_EA_SET, $3, *$1->attribute); |
9eef9c64 MM |
863 | break; |
864 | default: | |
865 | cf_error("Can't assign to symbol %s", $1->name); | |
866 | } | |
b9d70dc8 | 867 | } |
2d496d20 | 868 | | RETURN term ';' { |
d4d75628 | 869 | DBG( "Ook, we'll return the value\n" ); |
a84b8b6e | 870 | $$ = f_new_inst(FI_RETURN, $2); |
2d496d20 | 871 | } |
c0e958e0 | 872 | | dynamic_attr '=' term ';' { |
a84b8b6e | 873 | $$ = f_new_inst(FI_EA_SET, $3, $1); |
f31156ca | 874 | } |
c0e958e0 MM |
875 | | static_attr '=' term ';' { |
876 | if ($1.readonly) | |
0dc4431c | 877 | cf_error( "This static attribute is read-only."); |
a84b8b6e | 878 | $$ = f_new_inst(FI_RTA_SET, $3, $1); |
0dc4431c PM |
879 | } |
880 | | PREFERENCE '=' term ';' { | |
a84b8b6e | 881 | $$ = f_new_inst(FI_PREF_SET, $3); |
c8cafc8e | 882 | } |
c0e958e0 MM |
883 | | UNSET '(' dynamic_attr ')' ';' { |
884 | $$ = f_new_inst(FI_EA_UNSET, $3); | |
c7b43f33 | 885 | } |
0206c070 | 886 | | break_command print_list ';' { |
efd7c87b MM |
887 | struct f_inst *breaker = f_new_inst(FI_DIE, $1); |
888 | if ($2) { | |
889 | struct f_inst *printer = f_new_inst(FI_PRINT, $2); | |
890 | struct f_inst *flusher = f_new_inst(FI_FLUSH); | |
891 | printer->next = flusher; | |
892 | flusher->next = breaker; | |
0206c070 | 893 | $$ = printer; |
efd7c87b | 894 | } else |
0206c070 MM |
895 | $$ = breaker; |
896 | } | |
efd7c87b MM |
897 | | PRINT print_list ';' { |
898 | $$ = f_new_inst(FI_PRINT, $2); | |
899 | $$->next = f_new_inst(FI_FLUSH); | |
900 | } | |
901 | | PRINTN print_list ';' { | |
902 | $$ = f_new_inst(FI_PRINT, $2); | |
903 | } | |
9b46748d | 904 | | function_call ';' { $$ = f_new_inst(FI_DROP_RESULT, $1); } |
7db7b7db | 905 | | CASE term '{' switch_body '}' { |
9b46748d | 906 | $$ = f_new_inst(FI_SWITCH, $2, build_tree($4)); |
7db7b7db | 907 | } |
7d6eebae | 908 | |
c0e958e0 MM |
909 | | dynamic_attr '.' EMPTY ';' { $$ = f_generate_empty($1); } |
910 | | dynamic_attr '.' PREPEND '(' term ')' ';' { $$ = f_generate_complex( FI_PATH_PREPEND, $1, $5 ); } | |
911 | | dynamic_attr '.' ADD '(' term ')' ';' { $$ = f_generate_complex( FI_CLIST_ADD, $1, $5 ); } | |
912 | | dynamic_attr '.' DELETE '(' term ')' ';' { $$ = f_generate_complex( FI_CLIST_DEL, $1, $5 ); } | |
913 | | dynamic_attr '.' FILTER '(' term ')' ';' { $$ = f_generate_complex( FI_CLIST_FILTER, $1, $5 ); } | |
3ec0bedc | 914 | | BT_ASSERT '(' get_cf_position term get_cf_position ')' ';' { $$ = assert_done($4, $3 + 1, $5 - 1); } |
c0e958e0 | 915 | | BT_CHECK_ASSIGN '(' get_cf_position lvalue get_cf_position ',' term ')' ';' { $$ = assert_assign(&$4, $7, $3 + 1, $5 - 1); } |
9b0a0ba9 OZ |
916 | ; |
917 | ||
918 | get_cf_position: | |
919 | { | |
920 | $$ = cf_text; | |
921 | }; | |
922 | ||
c0e958e0 | 923 | lvalue: |
9eef9c64 | 924 | CF_SYM_KNOWN { cf_assert_symbol($1, SYM_VARIABLE); $$ = (struct f_lval) { .type = F_LVAL_VARIABLE, .sym = $1 }; } |
c0e958e0 MM |
925 | | PREFERENCE { $$ = (struct f_lval) { .type = F_LVAL_PREFERENCE }; } |
926 | | static_attr { $$ = (struct f_lval) { .type = F_LVAL_SA, .sa = $1 }; } | |
927 | | dynamic_attr { $$ = (struct f_lval) { .type = F_LVAL_EA, .da = $1 }; }; | |
9b0a0ba9 | 928 | |
b9d70dc8 | 929 | CF_END |