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Commit | Line | Data |
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b9d70dc8 PM |
1 | /* |
2 | * BIRD - filters | |
3 | * | |
6542ece9 | 4 | * Copyright 1998,1999 Pavel Machek |
b9d70dc8 PM |
5 | * |
6 | * Can be freely distributed and used under the terms of the GNU GPL. | |
c9f8c1a8 | 7 | * |
f4536657 | 8 | FIXME (nonurgent): define keyword |
c9f8c1a8 PM |
9 | FIXME: whole system of paths, path ~ string, path.prepend(), path.originate |
10 | FIXME: create community lists | |
f4536657 | 11 | FIXME: write access to dynamic attributes. |
346a12c2 | 12 | FIXME: '! =' should not be permitted. Ze `!=' by nemelo byt totez jako `! =' Nadefinujes si pres %token novy token a do cf-lex.l pridas nove pravidlo, ktere jej rozpoznava. Napriklad != return NEQ; |
c7b43f33 | 13 | FIXME: write access to static attribute: Z rte ma byt read/write: pref, attrs (neprimo). |
346a12c2 | 14 | |
b9d70dc8 PM |
15 | */ |
16 | ||
17 | CF_HDR | |
18 | ||
19 | #include "nest/bird.h" | |
b9d70dc8 PM |
20 | #include "lib/resource.h" |
21 | #include "lib/socket.h" | |
22 | #include "lib/timer.h" | |
23 | #include "nest/protocol.h" | |
24 | #include "nest/iface.h" | |
25 | #include "nest/route.h" | |
cb8034f4 | 26 | #include <string.h> |
b9d70dc8 PM |
27 | |
28 | CF_DECLS | |
29 | ||
d3dd620b | 30 | CF_KEYWORDS(FUNCTION, PRINT, PRINTN, CONST, |
ba921648 PM |
31 | ACCEPT, REJECT, ERROR, QUITBIRD, |
32 | INT, BOOL, IP, PREFIX, PAIR, SET, STRING, | |
7db7b7db | 33 | IF, THEN, ELSE, CASE, |
23b1539b | 34 | TRUE, FALSE, |
346a12c2 | 35 | RTA, FROM, GW, NET, MASK, RIP_METRIC, RIP_TAG, SOURCE, |
36bbfc70 | 36 | LEN, |
f4536657 | 37 | DEFINED, |
36bbfc70 | 38 | IMPOSSIBLE, |
fd54b602 | 39 | FILTER) |
b9d70dc8 | 40 | |
f4536657 | 41 | %nonassoc THEN |
4ed8718a | 42 | %nonassoc ELSE |
f4536657 | 43 | |
4515bdba | 44 | %type <x> term block cmds cmd function_body constant print_one print_list var_list var_listn any_dynamic |
e0f2e42f | 45 | %type <f> filter filter_body |
4515bdba | 46 | %type <i> type break_command pair |
41be4444 | 47 | %type <e> set_item set_items switch_body |
d3dd620b | 48 | %type <v> set_atom prefix prefix_s ipa |
6dc7a0cb | 49 | %type <s> decls declsn one_decl function_params |
b9d70dc8 PM |
50 | |
51 | CF_GRAMMAR | |
52 | ||
e0f2e42f MM |
53 | CF_ADDTO(conf, filter_def) |
54 | filter_def: | |
cb8034f4 | 55 | FILTER SYM { cf_push_scope( $2 ); } filter_body { |
ae3e1af2 PM |
56 | cf_define_symbol($2, SYM_FILTER, $4); |
57 | $4->name = $2->name; | |
58 | printf( "We have new filter defined (%s)\n", $2->name ); | |
59 | cf_pop_scope(); | |
b9d70dc8 PM |
60 | } |
61 | ; | |
62 | ||
ba921648 PM |
63 | type: |
64 | INT { $$ = T_INT; } | |
65 | | BOOL { $$ = T_BOOL; } | |
66 | | IP { $$ = T_IP; } | |
67 | | PREFIX { $$ = T_PREFIX; } | |
68 | | PAIR { $$ = T_PAIR; } | |
69 | | STRING { $$ = T_STRING; } | |
70 | | type SET { | |
71 | switch ($1) { | |
72 | default: | |
73 | cf_error( "You can not create sets of this type\n" ); | |
74 | case T_INT: case T_IP: case T_PREFIX: case T_PAIR: | |
75 | } | |
76 | $$ = $1 | T_SET; | |
77 | } | |
78 | ; | |
79 | ||
6dc7a0cb PM |
80 | one_decl: |
81 | type SYM { | |
4107df1d | 82 | cf_define_symbol($2, SYM_VARIABLE | $1, NULL); |
ba921648 | 83 | printf( "New variable %s type %x\n", $2->name, $1 ); |
cb8034f4 | 84 | $2->aux = 0; |
d3dd620b PM |
85 | { |
86 | struct f_val * val; | |
87 | val = cfg_alloc(sizeof(struct f_val)); | |
88 | val->type = $1; | |
89 | $2->aux2 = val; | |
90 | } | |
6542ece9 | 91 | $$=$2; |
ba921648 PM |
92 | } |
93 | ; | |
94 | ||
6dc7a0cb PM |
95 | /* Decls with ';' at the end */ |
96 | decls: /* EMPTY */ { $$ = NULL; } | |
97 | | one_decl ';' decls { | |
98 | $$ = $1; | |
cb8034f4 | 99 | $$->aux = (int) $3; |
6dc7a0cb PM |
100 | } |
101 | ; | |
102 | ||
3c989eb4 | 103 | /* Declarations that have no ';' at the end. */ |
6dc7a0cb PM |
104 | declsn: one_decl { $$ = $1; } |
105 | | declsn ';' one_decl { | |
4515bdba PM |
106 | $$ = $1; |
107 | $$->aux = (int) $3; | |
6dc7a0cb PM |
108 | } |
109 | ; | |
110 | ||
111 | ||
e0f2e42f | 112 | filter_body: |
ba921648 | 113 | function_body { |
e0f2e42f MM |
114 | struct filter *f = cfg_alloc(sizeof(struct filter)); |
115 | f->name = NULL; | |
ba921648 | 116 | f->root = $1; |
e0f2e42f MM |
117 | $$ = f; |
118 | } | |
119 | ; | |
120 | ||
121 | filter: | |
122 | SYM { | |
123 | if ($1->class != SYM_FILTER) cf_error("No such filter"); | |
124 | $$ = $1->def; | |
125 | } | |
126 | | filter_body | |
127 | ; | |
128 | ||
ba921648 | 129 | function_params: |
6dc7a0cb PM |
130 | '(' declsn ')' { printf( "Have function parameters\n" ); $$=$2; } |
131 | | '(' ')' { $$=NULL; } | |
ba921648 | 132 | ; |
b9d70dc8 | 133 | |
ba921648 PM |
134 | function_body: |
135 | decls '{' cmds '}' { | |
136 | $$ = $3; | |
84c7e194 | 137 | } |
ba921648 PM |
138 | ; |
139 | ||
140 | CF_ADDTO(conf, function_def) | |
141 | function_def: | |
cb8034f4 | 142 | FUNCTION SYM { printf( "Begining of function %s\n", $2->name ); cf_push_scope($2); } function_params function_body { |
ba921648 | 143 | extern struct f_inst *startup_func; |
ae3e1af2 | 144 | cf_define_symbol($2, SYM_FUNCTION, $5); |
ba921648 | 145 | if (!strcasecmp($2->name, "startup")) |
ae3e1af2 | 146 | startup_func = $5; |
cb8034f4 | 147 | $2->aux = (int) $4; |
ae3e1af2 | 148 | $2->aux2 = $5; |
ba921648 | 149 | printf("Hmm, we've got one function here - %s\n", $2->name); |
ae3e1af2 | 150 | cf_pop_scope(); |
ba921648 PM |
151 | } |
152 | ; | |
153 | ||
154 | /* Programs */ | |
155 | ||
156 | cmds: /* EMPTY */ { $$ = NULL; } | |
157 | | cmd cmds { | |
84c7e194 | 158 | if ($1) { |
7db7b7db PM |
159 | if ($1->next) |
160 | bug("Command has next already set\n"); | |
ba921648 | 161 | $1->next = $2; |
84c7e194 | 162 | $$ = $1; |
ba921648 | 163 | } else $$ = $2; |
84c7e194 PM |
164 | } |
165 | ; | |
166 | ||
2575593e | 167 | block: |
ba921648 | 168 | cmd { |
2575593e PM |
169 | $$=$1; |
170 | } | |
171 | | '{' cmds '}' { | |
172 | $$=$2; | |
173 | } | |
174 | ; | |
175 | ||
d3dd620b PM |
176 | /* |
177 | * Simple types, their bison value is int | |
178 | */ | |
179 | pair: | |
180 | '(' NUM ',' NUM ')' { $$ = $2 << 16 | $4; } | |
181 | ; | |
182 | ||
183 | /* | |
184 | * Complex types, their bison value is struct f_val | |
185 | */ | |
186 | prefix_s: | |
187 | IPA '/' NUM { $$.type = T_PREFIX; $$.val.px.ip = $1; $$.val.px.len = $3; printf( "ook, we have prefix here\n" ); } | |
188 | ; | |
189 | ||
190 | prefix: | |
191 | prefix_s { $$ = $1; } | |
192 | | prefix_s '+' { $$ = $1; $$.val.px.len |= LEN_PLUS; } | |
193 | | prefix_s '-' { $$ = $1; $$.val.px.len |= LEN_MINUS; } | |
6dc7a0cb | 194 | | prefix_s '{' NUM ',' NUM '}' { $$ = $1; $$.val.px.len |= LEN_RANGE | ($3 << 16) | ($5 << 8); } |
d3dd620b PM |
195 | ; |
196 | ||
197 | ipa: | |
6dc7a0cb | 198 | IPA { $$.type = T_IP; $$.val.px.ip = $1; } |
d3dd620b PM |
199 | ; |
200 | ||
38506f71 | 201 | set_atom: |
d3dd620b PM |
202 | NUM { $$.type = T_INT; $$.val.i = $1; } |
203 | | pair { $$.type = T_PAIR; $$.val.i = $1; } | |
204 | | ipa { $$ = $1; } | |
205 | | prefix { $$ = $1; } | |
38506f71 PM |
206 | ; |
207 | ||
208 | set_item: | |
209 | set_atom { $$ = f_new_tree(); $$->from = $$->to = $1 } | |
210 | | set_atom '.' '.' set_atom { $$ = f_new_tree(); $$->from = $1; $$->to = $4; } | |
211 | ; | |
212 | ||
213 | set_items: | |
214 | set_item { $$ = $1; } | |
215 | | set_items ',' set_item { $$ = $3; $$->left = $1; } | |
216 | ; | |
217 | ||
41be4444 PM |
218 | switch_body: /* EMPTY */ { $$ = NULL; } |
219 | | set_item ':' cmds switch_body { | |
220 | $$ = $1; | |
221 | $$->data = $3; | |
222 | $$->left = $4; | |
223 | } | |
224 | | ELSE ':' cmds { | |
225 | $$ = f_new_tree(); | |
226 | $$->from.type = T_VOID; | |
227 | $$->to.type = T_VOID; | |
228 | $$->data = $3; | |
229 | } | |
230 | ; | |
d3dd620b | 231 | |
23b1539b | 232 | constant: |
c7b43f33 PM |
233 | CONST '(' expr ')' { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_INT; $$->a2.i = $3; } |
234 | | NUM { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_INT; $$->a2.i = $1; } | |
235 | | TRUE { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_BOOL; $$->a2.i = 1; } | |
236 | | FALSE { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_BOOL; $$->a2.i = 0; } | |
237 | | TEXT { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_STRING; $$->a2.p = $1; } | |
238 | | pair { $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_PAIR; $$->a2.i = $1; } | |
d3dd620b | 239 | | ipa { NEW_F_VAL; $$ = f_new_inst(); $$->code = 'C'; $$->a1.p = val; *val = $1; } |
2f702671 | 240 | | prefix_s {NEW_F_VAL; $$ = f_new_inst(); $$->code = 'C'; $$->a1.p = val; *val = $1; } |
c7b43f33 PM |
241 | | '[' set_items ']' { printf( "We've got a set here..." ); $$ = f_new_inst(); $$->code = 'c'; $$->aux = T_SET; $$->a2.p = build_tree($2); printf( "ook\n" ); } |
242 | | ENUM { $$ = f_new_inst(); $$->code = 'c'; $$->aux = $1 >> 16; $$->a2.i = $1 & 0xffff; } | |
23b1539b PM |
243 | ; |
244 | ||
f4536657 | 245 | any_dynamic: |
c7b43f33 PM |
246 | RIP_METRIC { $$ = f_new_inst(); $$->aux = T_INT; $$->a2.i = EA_RIP_METRIC;} |
247 | | RIP_TAG { $$ = f_new_inst(); $$->aux = T_INT; $$->a2.i = EA_RIP_TAG; } | |
f4536657 PM |
248 | ; |
249 | ||
250 | ||
84c7e194 | 251 | term: |
f4536657 PM |
252 | '(' term ')' { $$ = $2; } |
253 | | term '+' term { $$ = f_new_inst(); $$->code = '+'; $$->a1.p = $1; $$->a2.p = $3; } | |
2db3b288 PM |
254 | | term '=' term { $$ = f_new_inst(); $$->code = '=='; $$->a1.p = $1; $$->a2.p = $3; } |
255 | | term '!' '=' term { $$ = f_new_inst(); $$->code = '!='; $$->a1.p = $1; $$->a2.p = $4; } | |
256 | | term '<' term { $$ = f_new_inst(); $$->code = '<'; $$->a1.p = $1; $$->a2.p = $3; } | |
257 | | term '<' '=' term { $$ = f_new_inst(); $$->code = '<='; $$->a1.p = $1; $$->a2.p = $4; } | |
258 | | term '>' term { $$ = f_new_inst(); $$->code = '<'; $$->a1.p = $3; $$->a2.p = $1; } | |
259 | | term '>' '=' term { $$ = f_new_inst(); $$->code = '<='; $$->a1.p = $4; $$->a2.p = $1; } | |
38506f71 | 260 | | term '~' term { $$ = f_new_inst(); $$->code = '~'; $$->a1.p = $1; $$->a2.p = $3; } |
f4536657 | 261 | | DEFINED '(' term ')' { $$ = f_new_inst(); $$->code = 'de'; $$->a1.p = $3; } |
23b1539b | 262 | |
1183b6b2 | 263 | | constant { $$ = $1; } |
2575593e PM |
264 | | SYM { |
265 | $$ = f_new_inst(); | |
266 | switch ($1->class) { | |
ba921648 | 267 | case SYM_VARIABLE | T_INT: |
d3dd620b PM |
268 | case SYM_VARIABLE | T_PAIR: |
269 | case SYM_VARIABLE | T_PREFIX: | |
270 | case SYM_VARIABLE | T_IP: | |
271 | $$->code = 'C'; | |
272 | $$->a1.p = $1->aux2; | |
2575593e PM |
273 | break; |
274 | default: | |
1183b6b2 | 275 | cf_error("Can not use this class of symbol (%s,%x) as variable.", $1->name, $1->class ); |
2575593e PM |
276 | } |
277 | } | |
4515bdba | 278 | |
346a12c2 | 279 | | RTA '.' FROM { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_IP; $$->a2.i = OFFSETOF(struct rta, from); } |
36bbfc70 | 280 | |
346a12c2 PM |
281 | | RTA '.' GW { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_IP; $$->a2.i = OFFSETOF(struct rta, gw); } |
282 | | RTA '.' NET { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_PREFIX; $$->a2.i = 0x12345678; } | |
283 | | RTA '.' SOURCE { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_ENUM_RTS; $$->a2.i = OFFSETOF(struct rta, gw); } | |
6dc7a0cb | 284 | |
f4536657 | 285 | | RTA '.' any_dynamic { $$ = $3; $$->code = 'ea'; } |
36bbfc70 | 286 | |
c7b43f33 PM |
287 | | term '.' IP { $$ = f_new_inst(); $$->code = 'cp'; $$->a1.p = $1; $$->aux = T_IP; } |
288 | | term '.' LEN { $$ = f_new_inst(); $$->code = 'cp'; $$->a1.p = $1; $$->aux = T_INT; } | |
d3dd620b | 289 | | term '.' MASK '(' term ')' { $$ = f_new_inst(); $$->code = 'iM'; $$->a1.p = $1; $$->a2.p = $5; } |
ba921648 PM |
290 | ; |
291 | ||
292 | break_command: | |
293 | QUITBIRD { $$ = F_QUITBIRD } | |
294 | | ACCEPT { $$ = F_ACCEPT } | |
295 | | REJECT { $$ = F_REJECT } | |
296 | | ERROR { $$ = F_ERROR } | |
23b1539b | 297 | | PRINT { $$ = F_NOP } |
d3dd620b | 298 | | PRINTN { $$ = F_NONL } |
ba921648 PM |
299 | ; |
300 | ||
23b1539b | 301 | print_one: |
2db3b288 | 302 | term { $$ = f_new_inst(); $$->code = 'p'; $$->a1.p = $1; $$->a2.p = NULL; } |
23b1539b PM |
303 | ; |
304 | ||
305 | print_list: /* EMPTY */ { $$ = NULL; } | |
306 | | print_one print_list { | |
307 | if ($1) { | |
308 | $1->next = $2; | |
309 | $$ = $1; | |
310 | } else $$ = $2; | |
311 | } | |
312 | ; | |
313 | ||
6dc7a0cb | 314 | var_listn: term { |
d3dd620b PM |
315 | $$ = f_new_inst(); |
316 | $$->code = 's'; | |
317 | $$->a1.p = NULL; | |
318 | $$->a2.p = $1; | |
319 | $$->next = NULL; | |
320 | } | |
6dc7a0cb | 321 | | term ',' var_listn { |
6542ece9 PM |
322 | $$ = f_new_inst(); |
323 | $$->code = 's'; | |
324 | $$->a1.p = NULL; | |
325 | $$->a2.p = $1; | |
326 | $$->next = $3; | |
327 | } | |
328 | ; | |
329 | ||
6dc7a0cb PM |
330 | var_list: /* EMPTY */ { $$ = NULL; } |
331 | | var_listn { $$ = $1; } | |
332 | ; | |
333 | ||
23b1539b | 334 | cmd: |
49955645 MM |
335 | IF term THEN block { |
336 | $$ = f_new_inst(); | |
337 | $$->code = '?'; | |
338 | $$->a1.p = $2; | |
339 | $$->a2.p = $4; | |
23b1539b | 340 | } |
49955645 MM |
341 | | IF term THEN block ELSE block { |
342 | struct f_inst *i = f_new_inst(); | |
343 | i->code = '?'; | |
344 | i->a1.p = $2; | |
345 | i->a2.p = $4; | |
23b1539b PM |
346 | $$ = f_new_inst(); |
347 | $$->code = '?'; | |
49955645 MM |
348 | $$->a1.p = i; |
349 | $$->a2.p = $6; | |
23b1539b | 350 | } |
ba921648 | 351 | | SYM '=' term ';' { |
84c7e194 | 352 | $$ = f_new_inst(); |
b9d70dc8 | 353 | printf( "Ook, we'll set value\n" ); |
ba921648 PM |
354 | if (($1->class & ~T_MASK) != SYM_VARIABLE) |
355 | cf_error( "You may only set variables, and this is %x.\n", $1->class ); | |
23b1539b | 356 | $$->code = 's'; |
2db3b288 PM |
357 | $$->a1.p = $1; |
358 | $$->a2.p = $3; | |
b9d70dc8 | 359 | } |
c7b43f33 PM |
360 | | RTA '.' any_dynamic '=' term ';' { |
361 | $$ = $3; | |
362 | $$->code = 'eS'; | |
363 | ||
364 | } | |
2db3b288 | 365 | | break_command print_list ';' { $$ = f_new_inst(); $$->code = 'p,'; $$->a1.p = $2; $$->a2.i = $1; } |
6542ece9 PM |
366 | | SYM '(' var_list ')' ';' { |
367 | struct symbol *sym; | |
368 | struct f_inst *inst = $3; | |
369 | if ($1->class != SYM_FUNCTION) | |
370 | cf_error("You can not call something which is not function. Really."); | |
371 | printf("You are calling function %s\n", $1->name); | |
372 | $$ = f_new_inst(); | |
373 | $$->code = 'ca'; | |
374 | $$->a1.p = inst; | |
375 | $$->a2.p = $1->aux2; | |
cb8034f4 | 376 | sym = (void *) $1->aux; |
6542ece9 PM |
377 | while (sym || inst) { |
378 | if (!sym || !inst) | |
379 | cf_error("wrong number of arguments for function %s.", $1->name); | |
380 | printf( "You should pass parameter called %s\n", sym->name); | |
381 | inst->a1.p = sym; | |
cb8034f4 | 382 | sym = (void *) sym->aux; |
6542ece9 PM |
383 | inst = inst->next; |
384 | } | |
385 | } | |
7db7b7db PM |
386 | | CASE term '{' switch_body '}' { |
387 | $$ = f_new_inst(); | |
41be4444 | 388 | $$->code = 'SW'; |
7db7b7db | 389 | $$->a1.p = $2; |
41be4444 | 390 | $$->a2.p = build_tree( $4 ); |
7db7b7db | 391 | } |
b9d70dc8 PM |
392 | ; |
393 | ||
394 | CF_END |