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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. | |
7 | */ | |
8 | ||
9 | CF_HDR | |
10 | ||
11 | #include "nest/bird.h" | |
b9d70dc8 PM |
12 | #include "lib/resource.h" |
13 | #include "lib/socket.h" | |
14 | #include "lib/timer.h" | |
15 | #include "nest/protocol.h" | |
16 | #include "nest/iface.h" | |
17 | #include "nest/route.h" | |
18 | ||
19 | CF_DECLS | |
20 | ||
38506f71 | 21 | CF_KEYWORDS(FUNCTION, PRINT, CONST, |
ba921648 PM |
22 | ACCEPT, REJECT, ERROR, QUITBIRD, |
23 | INT, BOOL, IP, PREFIX, PAIR, SET, STRING, | |
7db7b7db | 24 | IF, THEN, ELSE, CASE, |
23b1539b | 25 | TRUE, FALSE, |
36bbfc70 PM |
26 | RTA, FROM, GW, NET, |
27 | LEN, | |
28 | IMPOSSIBLE, | |
ba921648 PM |
29 | FILTER |
30 | ) | |
b9d70dc8 | 31 | |
7db7b7db | 32 | %type <x> term block cmds cmd function_body ifthen constant print_one print_list var_list switch_body |
e0f2e42f | 33 | %type <f> filter filter_body |
ba921648 | 34 | %type <i> type break_command |
38506f71 PM |
35 | %type <e> set_item set_items |
36 | %type <v> set_atom | |
6542ece9 | 37 | %type <s> decls function_params |
b9d70dc8 PM |
38 | |
39 | CF_GRAMMAR | |
40 | ||
e0f2e42f MM |
41 | CF_ADDTO(conf, filter_def) |
42 | filter_def: | |
43 | FILTER SYM filter_body { | |
4107df1d | 44 | cf_define_symbol($2, SYM_FILTER, $3); |
e0f2e42f | 45 | $3->name = $2->name; |
b9d70dc8 PM |
46 | printf( "We have new filter defined (%s)\n", $2->name ) |
47 | } | |
48 | ; | |
49 | ||
ba921648 PM |
50 | type: |
51 | INT { $$ = T_INT; } | |
52 | | BOOL { $$ = T_BOOL; } | |
53 | | IP { $$ = T_IP; } | |
54 | | PREFIX { $$ = T_PREFIX; } | |
55 | | PAIR { $$ = T_PAIR; } | |
56 | | STRING { $$ = T_STRING; } | |
57 | | type SET { | |
58 | switch ($1) { | |
59 | default: | |
60 | cf_error( "You can not create sets of this type\n" ); | |
61 | case T_INT: case T_IP: case T_PREFIX: case T_PAIR: | |
62 | } | |
63 | $$ = $1 | T_SET; | |
64 | } | |
65 | ; | |
66 | ||
6542ece9 | 67 | decls: /* EMPTY */ { $$ = NULL; } |
ba921648 | 68 | | type SYM ';' decls { |
4107df1d | 69 | cf_define_symbol($2, SYM_VARIABLE | $1, NULL); |
ba921648 | 70 | printf( "New variable %s type %x\n", $2->name, $1 ); |
6542ece9 PM |
71 | $2->aux = $4; |
72 | $$=$2; | |
ba921648 PM |
73 | } |
74 | ; | |
75 | ||
e0f2e42f | 76 | filter_body: |
ba921648 | 77 | function_body { |
e0f2e42f MM |
78 | struct filter *f = cfg_alloc(sizeof(struct filter)); |
79 | f->name = NULL; | |
ba921648 | 80 | f->root = $1; |
e0f2e42f MM |
81 | $$ = f; |
82 | } | |
83 | ; | |
84 | ||
85 | filter: | |
86 | SYM { | |
87 | if ($1->class != SYM_FILTER) cf_error("No such filter"); | |
88 | $$ = $1->def; | |
89 | } | |
90 | | filter_body | |
91 | ; | |
92 | ||
ba921648 | 93 | function_params: |
6542ece9 | 94 | '(' decls ')' { printf( "Have function parameters\n" ); $$=$2; } |
ba921648 | 95 | ; |
b9d70dc8 | 96 | |
ba921648 PM |
97 | function_body: |
98 | decls '{' cmds '}' { | |
99 | $$ = $3; | |
84c7e194 | 100 | } |
ba921648 PM |
101 | ; |
102 | ||
103 | CF_ADDTO(conf, function_def) | |
104 | function_def: | |
105 | FUNCTION SYM function_params function_body { | |
106 | extern struct f_inst *startup_func; | |
4107df1d | 107 | cf_define_symbol($2, SYM_FUNCTION, $4); |
ba921648 PM |
108 | if (!strcasecmp($2->name, "startup")) |
109 | startup_func = $4; | |
6542ece9 PM |
110 | $2->aux = $3; |
111 | $2->aux2 = $4; | |
ba921648 PM |
112 | printf("Hmm, we've got one function here - %s\n", $2->name); |
113 | } | |
114 | ; | |
115 | ||
116 | /* Programs */ | |
117 | ||
118 | cmds: /* EMPTY */ { $$ = NULL; } | |
119 | | cmd cmds { | |
84c7e194 | 120 | if ($1) { |
7db7b7db PM |
121 | if ($1->next) |
122 | bug("Command has next already set\n"); | |
ba921648 | 123 | $1->next = $2; |
84c7e194 | 124 | $$ = $1; |
ba921648 | 125 | } else $$ = $2; |
84c7e194 PM |
126 | } |
127 | ; | |
128 | ||
2575593e | 129 | block: |
ba921648 | 130 | cmd { |
2575593e PM |
131 | $$=$1; |
132 | } | |
133 | | '{' cmds '}' { | |
134 | $$=$2; | |
135 | } | |
136 | ; | |
137 | ||
38506f71 PM |
138 | set_atom: |
139 | NUM { $$.type = T_INT; $$.val.i = $1; } | |
140 | | IPA { $$.type = T_IP; $$.val.ip = $1; } | |
141 | ; | |
142 | ||
143 | set_item: | |
144 | set_atom { $$ = f_new_tree(); $$->from = $$->to = $1 } | |
145 | | set_atom '.' '.' set_atom { $$ = f_new_tree(); $$->from = $1; $$->to = $4; } | |
146 | ; | |
147 | ||
148 | set_items: | |
149 | set_item { $$ = $1; } | |
150 | | set_items ',' set_item { $$ = $3; $$->left = $1; } | |
151 | ; | |
152 | ||
23b1539b | 153 | constant: |
2db3b288 PM |
154 | CONST '(' expr ')' { $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_INT; $$->a2.i = $3; } |
155 | | NUM { $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_INT; $$->a2.i = $1; } | |
156 | | TRUE { $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_BOOL; $$->a2.i = 1; } | |
157 | | FALSE { $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_BOOL; $$->a2.i = 0; } | |
38506f71 PM |
158 | | TEXT { $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_STRING; $$->a2.p = $1; } |
159 | | IPA { struct f_val * val; val = cfg_alloc(sizeof(struct f_val)); $$ = f_new_inst(); $$->code = 'C'; $$->a1.p = val; val->type = T_IP; val->val.ip = $1; } | |
160 | | '[' set_items ']' { printf( "We've got a set here..." ); $$ = f_new_inst(); $$->code = 'c'; $$->a1.i = T_SET; $$->a2.p = build_tree($2); printf( "ook\n" ); } | |
23b1539b PM |
161 | ; |
162 | ||
84c7e194 | 163 | term: |
2db3b288 | 164 | term '+' term { $$ = f_new_inst(); $$->code = '+'; $$->a1.p = $1; $$->a2.p = $3; } |
2db3b288 PM |
165 | | term '=' term { $$ = f_new_inst(); $$->code = '=='; $$->a1.p = $1; $$->a2.p = $3; } |
166 | | term '!' '=' term { $$ = f_new_inst(); $$->code = '!='; $$->a1.p = $1; $$->a2.p = $4; } | |
167 | | term '<' term { $$ = f_new_inst(); $$->code = '<'; $$->a1.p = $1; $$->a2.p = $3; } | |
168 | | term '<' '=' term { $$ = f_new_inst(); $$->code = '<='; $$->a1.p = $1; $$->a2.p = $4; } | |
169 | | term '>' term { $$ = f_new_inst(); $$->code = '<'; $$->a1.p = $3; $$->a2.p = $1; } | |
170 | | term '>' '=' term { $$ = f_new_inst(); $$->code = '<='; $$->a1.p = $4; $$->a2.p = $1; } | |
38506f71 | 171 | | term '~' term { $$ = f_new_inst(); $$->code = '~'; $$->a1.p = $1; $$->a2.p = $3; } |
23b1539b | 172 | |
2575593e PM |
173 | | SYM { |
174 | $$ = f_new_inst(); | |
175 | switch ($1->class) { | |
ba921648 | 176 | case SYM_VARIABLE | T_INT: |
2575593e | 177 | $$->code = 'i'; |
2db3b288 PM |
178 | $$->a1.i = T_INT; |
179 | $$->a2.p = &($1->aux); | |
2575593e PM |
180 | break; |
181 | default: | |
6542ece9 | 182 | cf_error("Can not use this class of symbol as variable." ); |
2575593e PM |
183 | } |
184 | } | |
23b1539b | 185 | | constant { $$ = $1; } |
36bbfc70 PM |
186 | | RTA '.' FROM { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_IP; $$->a2.i = OFFSETOF(struct rta, from); } |
187 | ||
188 | | RTA '.' GW { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_IP; $$->a2.i = OFFSETOF(struct rta, gw); } | |
189 | | RTA '.' NET { $$ = f_new_inst(); $$->code = 'a'; $$->a1.i = T_PREFIX; $$->a2.i = 0x12345678; } | |
190 | ||
191 | | term '.' IP { $$ = f_new_inst(); $$->code = 'cp'; $$->a1.p = $1; $$->a2.i = T_IP; } | |
192 | | term '.' LEN { $$ = f_new_inst(); $$->code = 'cp'; $$->a1.p = $1; $$->a2.i = T_INT; } | |
ba921648 PM |
193 | ; |
194 | ||
195 | break_command: | |
196 | QUITBIRD { $$ = F_QUITBIRD } | |
197 | | ACCEPT { $$ = F_ACCEPT } | |
198 | | REJECT { $$ = F_REJECT } | |
199 | | ERROR { $$ = F_ERROR } | |
23b1539b | 200 | | PRINT { $$ = F_NOP } |
ba921648 PM |
201 | ; |
202 | ||
23b1539b | 203 | ifthen: |
ba921648 | 204 | IF term THEN block { |
b7005824 | 205 | $$ = f_new_inst(); |
ba921648 | 206 | $$->code = '?'; |
2db3b288 PM |
207 | $$->a1.p = $2; |
208 | $$->a2.p = $4; | |
b7005824 | 209 | } |
23b1539b PM |
210 | ; |
211 | ||
212 | print_one: | |
2db3b288 | 213 | term { $$ = f_new_inst(); $$->code = 'p'; $$->a1.p = $1; $$->a2.p = NULL; } |
23b1539b PM |
214 | ; |
215 | ||
216 | print_list: /* EMPTY */ { $$ = NULL; } | |
217 | | print_one print_list { | |
218 | if ($1) { | |
219 | $1->next = $2; | |
220 | $$ = $1; | |
221 | } else $$ = $2; | |
222 | } | |
223 | ; | |
224 | ||
6542ece9 PM |
225 | var_list: /* EMPTY */ { $$ = NULL; } |
226 | | term ',' var_list { | |
227 | $$ = f_new_inst(); | |
228 | $$->code = 's'; | |
229 | $$->a1.p = NULL; | |
230 | $$->a2.p = $1; | |
231 | $$->next = $3; | |
232 | } | |
233 | ; | |
234 | ||
7db7b7db PM |
235 | switch_body: /* EMPTY */ { $$ = NULL; } |
236 | | term ':' block switch_body { | |
237 | $$ = f_new_inst(); | |
238 | $$->code = 'of'; | |
239 | $$->a1.p = $1; | |
240 | $$->a2.p = $3; | |
241 | $$->next = $4; | |
242 | } | |
243 | | ELSE ':' block { | |
244 | $$ = f_new_inst(); | |
245 | $$->code = 'el'; | |
246 | $$->a1.p = NULL; | |
247 | $$->a2.p = $3; | |
248 | } | |
249 | ; | |
250 | ||
23b1539b PM |
251 | cmd: |
252 | ifthen { | |
253 | $$ = $1; | |
254 | } | |
255 | /* FIXME: this leads to shift/reduce conflict. */ | |
256 | | ifthen ELSE block { | |
257 | $$ = f_new_inst(); | |
258 | $$->code = '?'; | |
2db3b288 PM |
259 | $$->a1.p = $1; |
260 | $$->a2.p = $3; | |
23b1539b | 261 | } |
ba921648 | 262 | | SYM '=' term ';' { |
84c7e194 | 263 | $$ = f_new_inst(); |
b9d70dc8 | 264 | printf( "Ook, we'll set value\n" ); |
ba921648 PM |
265 | if (($1->class & ~T_MASK) != SYM_VARIABLE) |
266 | cf_error( "You may only set variables, and this is %x.\n", $1->class ); | |
23b1539b | 267 | $$->code = 's'; |
2db3b288 PM |
268 | $$->a1.p = $1; |
269 | $$->a2.p = $3; | |
b9d70dc8 | 270 | } |
2db3b288 | 271 | | break_command print_list ';' { $$ = f_new_inst(); $$->code = 'p,'; $$->a1.p = $2; $$->a2.i = $1; } |
6542ece9 PM |
272 | | SYM '(' var_list ')' ';' { |
273 | struct symbol *sym; | |
274 | struct f_inst *inst = $3; | |
275 | if ($1->class != SYM_FUNCTION) | |
276 | cf_error("You can not call something which is not function. Really."); | |
277 | printf("You are calling function %s\n", $1->name); | |
278 | $$ = f_new_inst(); | |
279 | $$->code = 'ca'; | |
280 | $$->a1.p = inst; | |
281 | $$->a2.p = $1->aux2; | |
282 | sym = $1->aux; | |
283 | while (sym || inst) { | |
284 | if (!sym || !inst) | |
285 | cf_error("wrong number of arguments for function %s.", $1->name); | |
286 | printf( "You should pass parameter called %s\n", sym->name); | |
287 | inst->a1.p = sym; | |
288 | sym = sym->aux; | |
289 | inst = inst->next; | |
290 | } | |
291 | } | |
7db7b7db PM |
292 | | CASE term '{' switch_body '}' { |
293 | $$ = f_new_inst(); | |
294 | $$->code = 'sw'; | |
295 | $$->a1.p = $2; | |
296 | $$->a2.p = $4; | |
297 | } | |
b9d70dc8 PM |
298 | ; |
299 | ||
300 | CF_END |