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Commit | Line | Data |
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63115431 TL |
1 | /* parse.c |
2 | ||
3 | Common parser code for dhcpd and dhclient. */ | |
4 | ||
5 | /* | |
f39b6e00 TL |
6 | * Copyright (c) 1996-1999 Internet Software Consortium. |
7 | * Use is subject to license terms which appear in the file named | |
8 | * ISC-LICENSE that should have accompanied this file when you | |
9 | * received it. If a file named ISC-LICENSE did not accompany this | |
10 | * file, or you are not sure the one you have is correct, you may | |
11 | * obtain an applicable copy of the license at: | |
63115431 | 12 | * |
f39b6e00 | 13 | * http://www.isc.org/isc-license-1.0.html. |
63115431 | 14 | * |
f39b6e00 TL |
15 | * This file is part of the ISC DHCP distribution. The documentation |
16 | * associated with this file is listed in the file DOCUMENTATION, | |
17 | * included in the top-level directory of this release. | |
63115431 | 18 | * |
f39b6e00 TL |
19 | * Support and other services are available for ISC products - see |
20 | * http://www.isc.org for more information. | |
63115431 TL |
21 | */ |
22 | ||
23 | #ifndef lint | |
24 | static char copyright[] = | |
eb42f00e | 25 | "$Id: parse.c,v 1.27 1999/07/06 16:57:05 mellon Exp $ Copyright (c) 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium. All rights reserved.\n"; |
63115431 TL |
26 | #endif /* not lint */ |
27 | ||
28 | #include "dhcpd.h" | |
29 | #include "dhctoken.h" | |
30 | ||
31 | /* Skip to the semicolon ending the current statement. If we encounter | |
32 | braces, the matching closing brace terminates the statement. If we | |
33 | encounter a right brace but haven't encountered a left brace, return | |
34 | leaving the brace in the token buffer for the caller. If we see a | |
35 | semicolon and haven't seen a left brace, return. This lets us skip | |
36 | over: | |
37 | ||
38 | statement; | |
39 | statement foo bar { } | |
40 | statement foo bar { statement { } } | |
41 | statement} | |
42 | ||
43 | ...et cetera. */ | |
44 | ||
45 | void skip_to_semi (cfile) | |
46 | FILE *cfile; | |
cea8b5c9 TL |
47 | { |
48 | skip_to_rbrace (cfile, 0); | |
49 | } | |
50 | ||
51 | void skip_to_rbrace (cfile, brace_count) | |
52 | FILE *cfile; | |
53 | int brace_count; | |
63115431 | 54 | { |
02a015fb | 55 | enum dhcp_token token; |
63115431 | 56 | char *val; |
63115431 TL |
57 | |
58 | do { | |
59 | token = peek_token (&val, cfile); | |
60 | if (token == RBRACE) { | |
efc79acb | 61 | token = next_token (&val, cfile); |
63115431 | 62 | if (brace_count) { |
63115431 TL |
63 | if (!--brace_count) |
64 | return; | |
65 | } else | |
66 | return; | |
67 | } else if (token == LBRACE) { | |
68 | brace_count++; | |
69 | } else if (token == SEMI && !brace_count) { | |
70 | token = next_token (&val, cfile); | |
71 | return; | |
796ef008 TL |
72 | } else if (token == EOL) { |
73 | /* EOL only happens when parsing /etc/resolv.conf, | |
74 | and we treat it like a semicolon because the | |
75 | resolv.conf file is line-oriented. */ | |
76 | token = next_token (&val, cfile); | |
77 | return; | |
63115431 TL |
78 | } |
79 | token = next_token (&val, cfile); | |
80 | } while (token != EOF); | |
81 | } | |
82 | ||
83 | int parse_semi (cfile) | |
84 | FILE *cfile; | |
85 | { | |
02a015fb | 86 | enum dhcp_token token; |
63115431 TL |
87 | char *val; |
88 | ||
89 | token = next_token (&val, cfile); | |
90 | if (token != SEMI) { | |
91 | parse_warn ("semicolon expected."); | |
92 | skip_to_semi (cfile); | |
93 | return 0; | |
94 | } | |
95 | return 1; | |
96 | } | |
97 | ||
98 | /* string-parameter :== STRING SEMI */ | |
99 | ||
100 | char *parse_string (cfile) | |
101 | FILE *cfile; | |
102 | { | |
103 | char *val; | |
02a015fb | 104 | enum dhcp_token token; |
63115431 TL |
105 | char *s; |
106 | ||
107 | token = next_token (&val, cfile); | |
108 | if (token != STRING) { | |
109 | parse_warn ("filename must be a string"); | |
110 | skip_to_semi (cfile); | |
111 | return (char *)0; | |
112 | } | |
113 | s = (char *)malloc (strlen (val) + 1); | |
114 | if (!s) | |
8ae2d595 | 115 | log_fatal ("no memory for string %s.", val); |
63115431 TL |
116 | strcpy (s, val); |
117 | ||
118 | if (!parse_semi (cfile)) | |
119 | return (char *)0; | |
120 | return s; | |
121 | } | |
122 | ||
be6be08d TL |
123 | /* |
124 | * hostname :== IDENTIFIER | |
125 | * | IDENTIFIER DOT | |
126 | * | hostname DOT IDENTIFIER | |
127 | */ | |
796ef008 TL |
128 | |
129 | char *parse_host_name (cfile) | |
130 | FILE *cfile; | |
131 | { | |
132 | char *val; | |
02a015fb | 133 | enum dhcp_token token; |
796ef008 TL |
134 | int len = 0; |
135 | char *s; | |
136 | char *t; | |
137 | pair c = (pair)0; | |
138 | ||
139 | /* Read a dotted hostname... */ | |
140 | do { | |
141 | /* Read a token, which should be an identifier. */ | |
68dda014 TL |
142 | token = peek_token (&val, cfile); |
143 | if (!is_identifier (token) && token != NUMBER) | |
144 | break; | |
796ef008 | 145 | token = next_token (&val, cfile); |
68dda014 | 146 | |
796ef008 TL |
147 | /* Store this identifier... */ |
148 | if (!(s = (char *)malloc (strlen (val) + 1))) | |
8ae2d595 | 149 | log_fatal ("can't allocate temp space for hostname."); |
796ef008 TL |
150 | strcpy (s, val); |
151 | c = cons ((caddr_t)s, c); | |
152 | len += strlen (s) + 1; | |
153 | /* Look for a dot; if it's there, keep going, otherwise | |
154 | we're done. */ | |
155 | token = peek_token (&val, cfile); | |
156 | if (token == DOT) | |
157 | token = next_token (&val, cfile); | |
158 | } while (token == DOT); | |
159 | ||
160 | /* Assemble the hostname together into a string. */ | |
161 | if (!(s = (char *)malloc (len))) | |
8ae2d595 | 162 | log_fatal ("can't allocate space for hostname."); |
796ef008 TL |
163 | t = s + len; |
164 | *--t = 0; | |
165 | while (c) { | |
166 | pair cdr = c -> cdr; | |
167 | int l = strlen ((char *)(c -> car)); | |
168 | t -= l; | |
169 | memcpy (t, (char *)(c -> car), l); | |
170 | /* Free up temp space. */ | |
171 | free (c -> car); | |
172 | free (c); | |
173 | c = cdr; | |
174 | if (t != s) | |
175 | *--t = '.'; | |
176 | } | |
177 | return s; | |
178 | } | |
179 | ||
be6be08d TL |
180 | /* ip-addr-or-hostname :== ip-address | hostname |
181 | ip-address :== NUMBER DOT NUMBER DOT NUMBER DOT NUMBER | |
182 | ||
183 | Parse an ip address or a hostname. If uniform is zero, put in | |
184 | an expr_substring node to limit hostnames that evaluate to more | |
185 | than one IP address. */ | |
186 | ||
02a015fb TL |
187 | int parse_ip_addr_or_hostname (expr, cfile, uniform) |
188 | struct expression **expr; | |
be6be08d TL |
189 | FILE *cfile; |
190 | int uniform; | |
191 | { | |
192 | char *val; | |
02a015fb | 193 | enum dhcp_token token; |
be6be08d TL |
194 | unsigned char addr [4]; |
195 | int len = sizeof addr; | |
196 | char *name; | |
02a015fb | 197 | struct expression *x = (struct expression *)0; |
be6be08d TL |
198 | |
199 | token = peek_token (&val, cfile); | |
200 | if (is_identifier (token)) { | |
201 | name = parse_host_name (cfile); | |
202 | if (!name) | |
02a015fb TL |
203 | return 0; |
204 | if (!make_host_lookup (expr, name)) | |
205 | return 0; | |
206 | if (!uniform) { | |
207 | if (!make_limit (&x, *expr, 4)) | |
208 | return 0; | |
209 | expression_dereference (expr, | |
210 | "parse_ip_addr_or_hostname"); | |
211 | *expr = x; | |
212 | } | |
be6be08d TL |
213 | } else if (token == NUMBER) { |
214 | if (!parse_numeric_aggregate (cfile, addr, &len, DOT, 10, 8)) | |
02a015fb TL |
215 | return 0; |
216 | return make_const_data (expr, addr, len, 0, 1); | |
be6be08d TL |
217 | } else { |
218 | if (token != RBRACE && token != LBRACE) | |
219 | token = next_token (&val, cfile); | |
220 | parse_warn ("%s (%d): expecting IP address or hostname", | |
221 | val, token); | |
222 | if (token != SEMI) | |
223 | skip_to_semi (cfile); | |
02a015fb | 224 | return 0; |
be6be08d TL |
225 | } |
226 | ||
02a015fb | 227 | return 1; |
be6be08d TL |
228 | } |
229 | ||
230 | /* | |
231 | * ip-address :== NUMBER DOT NUMBER DOT NUMBER DOT NUMBER | |
232 | */ | |
233 | ||
796ef008 TL |
234 | int parse_ip_addr (cfile, addr) |
235 | FILE *cfile; | |
236 | struct iaddr *addr; | |
237 | { | |
238 | char *val; | |
02a015fb | 239 | enum dhcp_token token; |
796ef008 TL |
240 | |
241 | addr -> len = 4; | |
242 | if (parse_numeric_aggregate (cfile, addr -> iabuf, | |
243 | &addr -> len, DOT, 10, 8)) | |
244 | return 1; | |
245 | return 0; | |
246 | } | |
247 | ||
be6be08d TL |
248 | /* |
249 | * hardware-parameter :== HARDWARE hardware-type colon-seperated-hex-list SEMI | |
250 | * hardware-type :== ETHERNET | TOKEN_RING | |
251 | */ | |
63115431 TL |
252 | |
253 | void parse_hardware_param (cfile, hardware) | |
254 | FILE *cfile; | |
255 | struct hardware *hardware; | |
256 | { | |
257 | char *val; | |
02a015fb | 258 | enum dhcp_token token; |
63115431 TL |
259 | int hlen; |
260 | unsigned char *t; | |
261 | ||
262 | token = next_token (&val, cfile); | |
263 | switch (token) { | |
264 | case ETHERNET: | |
265 | hardware -> htype = HTYPE_ETHER; | |
266 | break; | |
267 | case TOKEN_RING: | |
268 | hardware -> htype = HTYPE_IEEE802; | |
269 | break; | |
cea8b5c9 TL |
270 | case FDDI: |
271 | hardware -> htype = HTYPE_FDDI; | |
272 | break; | |
63115431 TL |
273 | default: |
274 | parse_warn ("expecting a network hardware type"); | |
275 | skip_to_semi (cfile); | |
276 | return; | |
277 | } | |
278 | ||
279 | /* Parse the hardware address information. Technically, | |
280 | it would make a lot of sense to restrict the length of the | |
281 | data we'll accept here to the length of a particular hardware | |
282 | address type. Unfortunately, there are some broken clients | |
283 | out there that put bogus data in the chaddr buffer, and we accept | |
284 | that data in the lease file rather than simply failing on such | |
285 | clients. Yuck. */ | |
286 | hlen = 0; | |
287 | t = parse_numeric_aggregate (cfile, (unsigned char *)0, &hlen, | |
288 | COLON, 16, 8); | |
289 | if (!t) | |
290 | return; | |
291 | if (hlen > sizeof hardware -> haddr) { | |
292 | free (t); | |
293 | parse_warn ("hardware address too long"); | |
294 | } else { | |
295 | hardware -> hlen = hlen; | |
296 | memcpy ((unsigned char *)&hardware -> haddr [0], | |
297 | t, hardware -> hlen); | |
cea8b5c9 TL |
298 | if (hlen < sizeof hardware -> haddr) |
299 | memset (&hardware -> haddr [hlen], 0, | |
300 | (sizeof hardware -> haddr) - hlen); | |
63115431 TL |
301 | free (t); |
302 | } | |
303 | ||
304 | token = next_token (&val, cfile); | |
305 | if (token != SEMI) { | |
306 | parse_warn ("expecting semicolon."); | |
307 | skip_to_semi (cfile); | |
308 | } | |
309 | } | |
310 | ||
311 | /* lease-time :== NUMBER SEMI */ | |
312 | ||
313 | void parse_lease_time (cfile, timep) | |
314 | FILE *cfile; | |
315 | TIME *timep; | |
316 | { | |
317 | char *val; | |
02a015fb | 318 | enum dhcp_token token; |
63115431 TL |
319 | |
320 | token = next_token (&val, cfile); | |
321 | if (token != NUMBER) { | |
322 | parse_warn ("Expecting numeric lease time"); | |
323 | skip_to_semi (cfile); | |
324 | return; | |
325 | } | |
326 | convert_num ((unsigned char *)timep, val, 10, 32); | |
327 | /* Unswap the number - convert_num returns stuff in NBO. */ | |
328 | *timep = ntohl (*timep); /* XXX */ | |
329 | ||
330 | parse_semi (cfile); | |
331 | } | |
332 | ||
333 | /* No BNF for numeric aggregates - that's defined by the caller. What | |
334 | this function does is to parse a sequence of numbers seperated by | |
335 | the token specified in seperator. If max is zero, any number of | |
336 | numbers will be parsed; otherwise, exactly max numbers are | |
337 | expected. Base and size tell us how to internalize the numbers | |
338 | once they've been tokenized. */ | |
339 | ||
340 | unsigned char *parse_numeric_aggregate (cfile, buf, | |
341 | max, seperator, base, size) | |
342 | FILE *cfile; | |
343 | unsigned char *buf; | |
344 | int *max; | |
345 | int seperator; | |
346 | int base; | |
347 | int size; | |
348 | { | |
349 | char *val; | |
02a015fb | 350 | enum dhcp_token token; |
63115431 TL |
351 | unsigned char *bufp = buf, *s, *t; |
352 | int count = 0; | |
353 | pair c = (pair)0; | |
354 | ||
355 | if (!bufp && *max) { | |
356 | bufp = (unsigned char *)malloc (*max * size / 8); | |
357 | if (!bufp) | |
8ae2d595 | 358 | log_fatal ("can't allocate space for numeric aggregate"); |
63115431 TL |
359 | } else |
360 | s = bufp; | |
361 | ||
362 | do { | |
363 | if (count) { | |
364 | token = peek_token (&val, cfile); | |
365 | if (token != seperator) { | |
366 | if (!*max) | |
367 | break; | |
368 | if (token != RBRACE && token != LBRACE) | |
369 | token = next_token (&val, cfile); | |
370 | parse_warn ("too few numbers."); | |
371 | if (token != SEMI) | |
372 | skip_to_semi (cfile); | |
373 | return (unsigned char *)0; | |
374 | } | |
375 | token = next_token (&val, cfile); | |
376 | } | |
377 | token = next_token (&val, cfile); | |
378 | ||
379 | if (token == EOF) { | |
380 | parse_warn ("unexpected end of file"); | |
381 | break; | |
382 | } | |
383 | ||
384 | /* Allow NUMBER_OR_NAME if base is 16. */ | |
385 | if (token != NUMBER && | |
386 | (base != 16 || token != NUMBER_OR_NAME)) { | |
387 | parse_warn ("expecting numeric value."); | |
388 | skip_to_semi (cfile); | |
389 | return (unsigned char *)0; | |
390 | } | |
391 | /* If we can, convert the number now; otherwise, build | |
392 | a linked list of all the numbers. */ | |
393 | if (s) { | |
394 | convert_num (s, val, base, size); | |
395 | s += size / 8; | |
396 | } else { | |
397 | t = (unsigned char *)malloc (strlen (val) + 1); | |
398 | if (!t) | |
8ae2d595 | 399 | log_fatal ("no temp space for number."); |
338303a4 TL |
400 | strcpy ((char *)t, val); |
401 | c = cons ((caddr_t)t, c); | |
63115431 TL |
402 | } |
403 | } while (++count != *max); | |
404 | ||
405 | /* If we had to cons up a list, convert it now. */ | |
406 | if (c) { | |
407 | bufp = (unsigned char *)malloc (count * size / 8); | |
408 | if (!bufp) | |
8ae2d595 | 409 | log_fatal ("can't allocate space for numeric aggregate."); |
63115431 TL |
410 | s = bufp + count - size / 8; |
411 | *max = count; | |
412 | } | |
413 | while (c) { | |
414 | pair cdr = c -> cdr; | |
415 | convert_num (s, (char *)(c -> car), base, size); | |
416 | s -= size / 8; | |
417 | /* Free up temp space. */ | |
418 | free (c -> car); | |
419 | free (c); | |
420 | c = cdr; | |
421 | } | |
422 | return bufp; | |
423 | } | |
424 | ||
425 | void convert_num (buf, str, base, size) | |
426 | unsigned char *buf; | |
427 | char *str; | |
428 | int base; | |
429 | int size; | |
430 | { | |
431 | char *ptr = str; | |
432 | int negative = 0; | |
433 | u_int32_t val = 0; | |
434 | int tval; | |
435 | int max; | |
436 | ||
437 | if (*ptr == '-') { | |
438 | negative = 1; | |
439 | ++ptr; | |
440 | } | |
441 | ||
442 | /* If base wasn't specified, figure it out from the data. */ | |
443 | if (!base) { | |
444 | if (ptr [0] == '0') { | |
445 | if (ptr [1] == 'x') { | |
446 | base = 16; | |
447 | ptr += 2; | |
448 | } else if (isascii (ptr [1]) && isdigit (ptr [1])) { | |
449 | base = 8; | |
450 | ptr += 1; | |
451 | } else { | |
452 | base = 10; | |
453 | } | |
454 | } else { | |
455 | base = 10; | |
456 | } | |
457 | } | |
458 | ||
459 | do { | |
460 | tval = *ptr++; | |
461 | /* XXX assumes ASCII... */ | |
462 | if (tval >= 'a') | |
463 | tval = tval - 'a' + 10; | |
464 | else if (tval >= 'A') | |
465 | tval = tval - 'A' + 10; | |
466 | else if (tval >= '0') | |
467 | tval -= '0'; | |
468 | else { | |
8ae2d595 | 469 | log_error ("Bogus number: %s.", str); |
63115431 TL |
470 | break; |
471 | } | |
472 | if (tval >= base) { | |
8ae2d595 | 473 | log_error ("Bogus number: %s: digit %d not in base %d\n", |
63115431 TL |
474 | str, tval, base); |
475 | break; | |
476 | } | |
477 | val = val * base + tval; | |
478 | } while (*ptr); | |
479 | ||
480 | if (negative) | |
481 | max = (1 << (size - 1)); | |
482 | else | |
483 | max = (1 << (size - 1)) + ((1 << (size - 1)) - 1); | |
484 | if (val > max) { | |
485 | switch (base) { | |
486 | case 8: | |
8ae2d595 | 487 | log_error ("value %s%o exceeds max (%d) for precision.", |
63115431 TL |
488 | negative ? "-" : "", val, max); |
489 | break; | |
490 | case 16: | |
8ae2d595 | 491 | log_error ("value %s%x exceeds max (%d) for precision.", |
63115431 TL |
492 | negative ? "-" : "", val, max); |
493 | break; | |
494 | default: | |
8ae2d595 | 495 | log_error ("value %s%u exceeds max (%d) for precision.", |
63115431 TL |
496 | negative ? "-" : "", val, max); |
497 | break; | |
498 | } | |
499 | } | |
500 | ||
501 | if (negative) { | |
502 | switch (size) { | |
503 | case 8: | |
504 | *buf = -(unsigned long)val; | |
505 | break; | |
506 | case 16: | |
507 | putShort (buf, -(unsigned long)val); | |
508 | break; | |
509 | case 32: | |
510 | putLong (buf, -(unsigned long)val); | |
511 | break; | |
512 | default: | |
8ae2d595 | 513 | log_error ("Unexpected integer size: %d\n", size); |
63115431 TL |
514 | break; |
515 | } | |
516 | } else { | |
517 | switch (size) { | |
518 | case 8: | |
519 | *buf = (u_int8_t)val; | |
520 | break; | |
521 | case 16: | |
522 | putUShort (buf, (u_int16_t)val); | |
523 | break; | |
524 | case 32: | |
525 | putULong (buf, val); | |
526 | break; | |
527 | default: | |
8ae2d595 | 528 | log_error ("Unexpected integer size: %d\n", size); |
63115431 TL |
529 | break; |
530 | } | |
531 | } | |
532 | } | |
533 | ||
be6be08d TL |
534 | /* |
535 | * date :== NUMBER NUMBER SLASH NUMBER SLASH NUMBER | |
a82abfc7 TL |
536 | * NUMBER COLON NUMBER COLON NUMBER SEMI | |
537 | * NUMBER NUMBER SLASH NUMBER SLASH NUMBER | |
538 | * NUMBER COLON NUMBER COLON NUMBER NUMBER SEMI | | |
be6be08d | 539 | * |
a82abfc7 TL |
540 | * Dates are stored in GMT or with a timezone offset; first number is day |
541 | * of week; next is year/month/day; next is hours:minutes:seconds on a | |
542 | * 24-hour clock, followed by the timezone offset in seconds, which is | |
543 | * optional. | |
be6be08d | 544 | */ |
63115431 TL |
545 | |
546 | TIME parse_date (cfile) | |
547 | FILE *cfile; | |
548 | { | |
549 | struct tm tm; | |
550 | int guess; | |
a82abfc7 | 551 | int tzoff, wday, year, mon, mday, hour, min, sec; |
63115431 | 552 | char *val; |
02a015fb | 553 | enum dhcp_token token; |
63115431 TL |
554 | static int months [11] = { 31, 59, 90, 120, 151, 181, |
555 | 212, 243, 273, 304, 334 }; | |
556 | ||
557 | /* Day of week... */ | |
558 | token = next_token (&val, cfile); | |
559 | if (token != NUMBER) { | |
560 | parse_warn ("numeric day of week expected."); | |
561 | if (token != SEMI) | |
562 | skip_to_semi (cfile); | |
563 | return (TIME)0; | |
564 | } | |
a82abfc7 | 565 | wday = atoi (val); |
63115431 TL |
566 | |
567 | /* Year... */ | |
568 | token = next_token (&val, cfile); | |
569 | if (token != NUMBER) { | |
570 | parse_warn ("numeric year expected."); | |
571 | if (token != SEMI) | |
572 | skip_to_semi (cfile); | |
573 | return (TIME)0; | |
574 | } | |
edca2b1a TL |
575 | |
576 | /* Note: the following is not a Y2K bug - it's a Y1.9K bug. Until | |
577 | somebody invents a time machine, I think we can safely disregard | |
578 | it. This actually works around a stupid Y2K bug that was present | |
579 | in a very early beta release of dhcpd. */ | |
a82abfc7 TL |
580 | year = atoi (val); |
581 | if (year > 1900) | |
582 | year -= 1900; | |
63115431 TL |
583 | |
584 | /* Slash seperating year from month... */ | |
585 | token = next_token (&val, cfile); | |
586 | if (token != SLASH) { | |
587 | parse_warn ("expected slash seperating year from month."); | |
588 | if (token != SEMI) | |
589 | skip_to_semi (cfile); | |
590 | return (TIME)0; | |
591 | } | |
592 | ||
593 | /* Month... */ | |
594 | token = next_token (&val, cfile); | |
595 | if (token != NUMBER) { | |
596 | parse_warn ("numeric month expected."); | |
597 | if (token != SEMI) | |
598 | skip_to_semi (cfile); | |
599 | return (TIME)0; | |
600 | } | |
a82abfc7 | 601 | mon = atoi (val) - 1; |
63115431 TL |
602 | |
603 | /* Slash seperating month from day... */ | |
604 | token = next_token (&val, cfile); | |
605 | if (token != SLASH) { | |
606 | parse_warn ("expected slash seperating month from day."); | |
607 | if (token != SEMI) | |
608 | skip_to_semi (cfile); | |
609 | return (TIME)0; | |
610 | } | |
611 | ||
612 | /* Month... */ | |
613 | token = next_token (&val, cfile); | |
614 | if (token != NUMBER) { | |
615 | parse_warn ("numeric day of month expected."); | |
616 | if (token != SEMI) | |
617 | skip_to_semi (cfile); | |
618 | return (TIME)0; | |
619 | } | |
a82abfc7 | 620 | mday = atoi (val); |
63115431 TL |
621 | |
622 | /* Hour... */ | |
623 | token = next_token (&val, cfile); | |
624 | if (token != NUMBER) { | |
625 | parse_warn ("numeric hour expected."); | |
626 | if (token != SEMI) | |
627 | skip_to_semi (cfile); | |
628 | return (TIME)0; | |
629 | } | |
a82abfc7 | 630 | hour = atoi (val); |
63115431 TL |
631 | |
632 | /* Colon seperating hour from minute... */ | |
633 | token = next_token (&val, cfile); | |
634 | if (token != COLON) { | |
635 | parse_warn ("expected colon seperating hour from minute."); | |
636 | if (token != SEMI) | |
637 | skip_to_semi (cfile); | |
638 | return (TIME)0; | |
639 | } | |
640 | ||
641 | /* Minute... */ | |
642 | token = next_token (&val, cfile); | |
643 | if (token != NUMBER) { | |
644 | parse_warn ("numeric minute expected."); | |
645 | if (token != SEMI) | |
646 | skip_to_semi (cfile); | |
647 | return (TIME)0; | |
648 | } | |
a82abfc7 | 649 | min = atoi (val); |
63115431 TL |
650 | |
651 | /* Colon seperating minute from second... */ | |
652 | token = next_token (&val, cfile); | |
653 | if (token != COLON) { | |
654 | parse_warn ("expected colon seperating hour from minute."); | |
655 | if (token != SEMI) | |
656 | skip_to_semi (cfile); | |
657 | return (TIME)0; | |
658 | } | |
659 | ||
660 | /* Minute... */ | |
661 | token = next_token (&val, cfile); | |
662 | if (token != NUMBER) { | |
663 | parse_warn ("numeric minute expected."); | |
664 | if (token != SEMI) | |
665 | skip_to_semi (cfile); | |
666 | return (TIME)0; | |
667 | } | |
a82abfc7 | 668 | sec = atoi (val); |
63115431 | 669 | |
a82abfc7 TL |
670 | token = peek_token (&val, cfile); |
671 | if (token == NUMBER) { | |
672 | token = next_token (&val, cfile); | |
673 | tzoff = atoi (val); | |
674 | } else | |
675 | tzoff = 0; | |
63115431 TL |
676 | |
677 | /* Make sure the date ends in a semicolon... */ | |
25541f2f | 678 | if (!parse_semi (cfile)) |
63115431 | 679 | return 0; |
63115431 TL |
680 | |
681 | /* Guess the time value... */ | |
a82abfc7 TL |
682 | guess = ((((((365 * (year - 70) + /* Days in years since '70 */ |
683 | (year - 69) / 4 + /* Leap days since '70 */ | |
684 | (mon /* Days in months this year */ | |
685 | ? months [mon - 1] | |
63115431 | 686 | : 0) + |
a82abfc7 TL |
687 | (mon > 1 && /* Leap day this year */ |
688 | !((year - 72) & 3)) + | |
689 | mday - 1) * 24) + /* Day of month */ | |
690 | hour) * 60) + | |
691 | min) * 60) + sec + tzoff; | |
63115431 TL |
692 | |
693 | /* This guess could be wrong because of leap seconds or other | |
694 | weirdness we don't know about that the system does. For | |
695 | now, we're just going to accept the guess, but at some point | |
696 | it might be nice to do a successive approximation here to | |
697 | get an exact value. Even if the error is small, if the | |
698 | server is restarted frequently (and thus the lease database | |
699 | is reread), the error could accumulate into something | |
700 | significant. */ | |
701 | ||
702 | return guess; | |
703 | } | |
4761e04b | 704 | |
be6be08d TL |
705 | /* |
706 | * option-name :== IDENTIFIER | | |
707 | IDENTIFIER . IDENTIFIER | |
708 | */ | |
709 | ||
6b4b0ec7 | 710 | struct option *parse_option_name (cfile, allocate) |
4761e04b | 711 | FILE *cfile; |
6b4b0ec7 | 712 | int allocate; |
4761e04b TL |
713 | { |
714 | char *val; | |
02a015fb | 715 | enum dhcp_token token; |
6b4b0ec7 | 716 | char *uname; |
4761e04b TL |
717 | struct universe *universe; |
718 | struct option *option; | |
719 | ||
720 | token = next_token (&val, cfile); | |
721 | if (!is_identifier (token)) { | |
722 | parse_warn ("expecting identifier after option keyword."); | |
723 | if (token != SEMI) | |
724 | skip_to_semi (cfile); | |
725 | return (struct option *)0; | |
726 | } | |
6b4b0ec7 TL |
727 | uname = malloc (strlen (val) + 1); |
728 | if (!uname) | |
729 | log_fatal ("no memory for uname information."); | |
730 | strcpy (uname, val); | |
4761e04b TL |
731 | token = peek_token (&val, cfile); |
732 | if (token == DOT) { | |
733 | /* Go ahead and take the DOT token... */ | |
734 | token = next_token (&val, cfile); | |
735 | ||
736 | /* The next token should be an identifier... */ | |
737 | token = next_token (&val, cfile); | |
738 | if (!is_identifier (token)) { | |
739 | parse_warn ("expecting identifier after '.'"); | |
740 | if (token != SEMI) | |
741 | skip_to_semi (cfile); | |
742 | return (struct option *)0; | |
743 | } | |
744 | ||
745 | /* Look up the option name hash table for the specified | |
6b4b0ec7 | 746 | uname. */ |
4761e04b TL |
747 | universe = ((struct universe *) |
748 | hash_lookup (&universe_hash, | |
6b4b0ec7 | 749 | (unsigned char *)uname, 0)); |
4761e04b TL |
750 | /* If it's not there, we can't parse the rest of the |
751 | declaration. */ | |
752 | if (!universe) { | |
6b4b0ec7 | 753 | parse_warn ("no option space named %s.", uname); |
4761e04b TL |
754 | skip_to_semi (cfile); |
755 | return (struct option *)0; | |
756 | } | |
757 | } else { | |
758 | /* Use the default hash table, which contains all the | |
759 | standard dhcp option names. */ | |
6b4b0ec7 | 760 | val = uname; |
4761e04b TL |
761 | universe = &dhcp_universe; |
762 | } | |
763 | ||
764 | /* Look up the actual option info... */ | |
765 | option = (struct option *)hash_lookup (universe -> hash, | |
766 | (unsigned char *)val, 0); | |
767 | ||
768 | /* If we didn't get an option structure, it's an undefined option. */ | |
769 | if (!option) { | |
6b4b0ec7 TL |
770 | /* If we've been told to allocate, that means that this |
771 | (might) be an option code definition, so we'll create | |
772 | an option structure just in case. */ | |
773 | if (allocate) { | |
774 | option = new_option ("parse_option_name"); | |
775 | if (val == uname) | |
776 | option -> name = val; | |
777 | else { | |
778 | free (uname); | |
779 | option -> name = dmalloc (strlen (val) + 1, | |
780 | "parse_option_name"); | |
781 | if (!option -> name) | |
782 | log_fatal ("no memory for option %s.%s", | |
783 | universe -> name, val); | |
784 | strcpy (option -> name, val); | |
785 | } | |
786 | option -> universe = universe; | |
787 | option -> code = -1; | |
788 | return option; | |
789 | } | |
790 | if (val == uname) | |
4761e04b TL |
791 | parse_warn ("no option named %s", val); |
792 | else | |
6b4b0ec7 TL |
793 | parse_warn ("no option named %s in space %s", |
794 | val, uname); | |
4761e04b TL |
795 | skip_to_semi (cfile); |
796 | return (struct option *)0; | |
797 | } | |
798 | ||
799 | /* Free the initial identifier token. */ | |
6b4b0ec7 | 800 | free (uname); |
4761e04b TL |
801 | return option; |
802 | } | |
803 | ||
52c9d530 TL |
804 | /* IDENTIFIER SEMI */ |
805 | ||
806 | void parse_option_space_decl (cfile) | |
807 | FILE *cfile; | |
808 | { | |
809 | int token; | |
810 | char *val; | |
811 | struct universe **ua, *nu; | |
812 | ||
813 | next_token (&val, cfile); /* Discard the SPACE token, which was | |
814 | checked by the caller. */ | |
815 | token = next_token (&val, cfile); | |
816 | if (!is_identifier (token)) { | |
817 | parse_warn ("expecting identifier."); | |
818 | skip_to_semi (cfile); | |
819 | return; | |
820 | } | |
821 | nu = new_universe ("parse_option_space_decl"); | |
822 | if (!nu) | |
823 | log_fatal ("No memory for new option space."); | |
824 | ||
825 | /* Set up the server option universe... */ | |
826 | nu -> name = dmalloc (strlen (val) + 1, "parse_option_space_decl"); | |
827 | if (!nu -> name) | |
828 | log_fatal ("No memory for new option space name."); | |
829 | strcpy (nu -> name, val); | |
830 | nu -> lookup_func = lookup_hashed_option; | |
831 | nu -> option_state_dereference = | |
832 | hashed_option_state_dereference; | |
833 | nu -> get_func = hashed_option_get; | |
834 | nu -> set_func = hashed_option_set; | |
835 | nu -> save_func = save_hashed_option; | |
836 | nu -> delete_func = delete_hashed_option; | |
837 | nu -> encapsulate = hashed_option_space_encapsulate; | |
838 | nu -> length_size = 1; | |
839 | nu -> tag_size = 1; | |
840 | nu -> store_tag = putUChar; | |
841 | nu -> store_length = putUChar; | |
842 | nu -> index = universe_count++; | |
843 | if (nu -> index >= universe_max) { | |
844 | ua = dmalloc (universe_max * 2 * sizeof *ua, | |
845 | "parse_option_space_decl"); | |
846 | if (!ua) | |
847 | log_fatal ("No memory to expand option space array."); | |
848 | memcpy (ua, universes, universe_max * sizeof *ua); | |
849 | universe_max *= 2; | |
850 | dfree (universes, "parse_option_space_decl"); | |
851 | universes = ua; | |
852 | } | |
853 | universes [nu -> index] = nu; | |
854 | nu -> hash = new_hash (); | |
855 | if (!nu -> hash) | |
856 | log_fatal ("Can't allocate %s option hash table.", nu -> name); | |
857 | add_hash (&universe_hash, | |
858 | (unsigned char *)nu -> name, 0, (unsigned char *)nu); | |
859 | parse_semi (cfile); | |
860 | } | |
861 | ||
6b4b0ec7 TL |
862 | /* This is faked up to look good right now. Ideally, this should do a |
863 | recursive parse and allow arbitrary data structure definitions, but for | |
864 | now it just allows you to specify a single type, an array of single types, | |
865 | a sequence of types, or an array of sequences of types. | |
866 | ||
867 | ocd :== NUMBER EQUALS ocsd SEMI | |
868 | ||
869 | ocsd :== ocsd_type | | |
870 | ocsd_type_sequence | | |
871 | ARRAY OF ocsd_type | | |
872 | ARRAY OF ocsd_type_sequence | |
873 | ||
874 | ocsd_type :== BOOLEAN | | |
875 | INTEGER NUMBER | | |
876 | SIGNED INTEGER NUMBER | | |
877 | UNSIGNED INTEGER NUMBER | | |
878 | IP-ADDRESS | | |
879 | TEXT | | |
880 | STRING | |
881 | ||
882 | ocsd_type_sequence :== LBRACE ocsd_types RBRACE | |
883 | ||
884 | ocsd_type :== ocsd_type | | |
885 | ocsd_types ocsd_type */ | |
886 | ||
887 | int parse_option_code_definition (cfile, option) | |
888 | FILE *cfile; | |
889 | struct option *option; | |
890 | { | |
891 | char *val; | |
892 | enum dhcp_token token; | |
893 | int arrayp = 0; | |
894 | int recordp = 0; | |
895 | int no_more_in_record = 0; | |
896 | char tokbuf [128]; | |
897 | int tokix = 0; | |
898 | char type; | |
899 | int code; | |
900 | int is_signed; | |
901 | ||
902 | /* Parse the option code. */ | |
903 | token = next_token (&val, cfile); | |
904 | if (token != NUMBER) { | |
905 | parse_warn ("expecting option code number."); | |
906 | skip_to_semi (cfile); | |
907 | return 0; | |
908 | } | |
909 | option -> code = atoi (val); | |
910 | ||
911 | token = next_token (&val, cfile); | |
912 | if (token != EQUAL) { | |
913 | parse_warn ("expecting \"=\""); | |
914 | skip_to_semi (cfile); | |
915 | return 0; | |
916 | } | |
917 | ||
918 | /* See if this is an array. */ | |
919 | token = next_token (&val, cfile); | |
920 | if (token == ARRAY) { | |
921 | token = next_token (&val, cfile); | |
922 | if (token != OF) { | |
923 | parse_warn ("expecting \"of\"."); | |
924 | skip_to_semi (cfile); | |
925 | return 0; | |
926 | } | |
927 | arrayp = 1; | |
928 | token = next_token (&val, cfile); | |
929 | } | |
930 | ||
931 | if (token == LBRACE) { | |
932 | recordp = 1; | |
933 | token = next_token (&val, cfile); | |
934 | } | |
935 | ||
936 | /* At this point we're expecting a data type. */ | |
937 | next_type: | |
938 | switch (token) { | |
939 | case BOOLEAN: | |
940 | type = 'f'; | |
941 | break; | |
942 | case INTEGER: | |
943 | is_signed = 1; | |
944 | parse_integer: | |
945 | token = next_token (&val, cfile); | |
946 | if (token != NUMBER) { | |
947 | parse_warn ("expecting number."); | |
948 | skip_to_rbrace (cfile, recordp); | |
949 | if (recordp) | |
950 | skip_to_semi (cfile); | |
951 | return 0; | |
952 | } | |
953 | switch (atoi (val)) { | |
954 | case 8: | |
955 | type = is_signed ? 'b' : 'B'; | |
956 | break; | |
957 | case 16: | |
958 | type = is_signed ? 's' : 'S'; | |
959 | break; | |
960 | case 32: | |
961 | type = is_signed ? 'l' : 'L'; | |
962 | break; | |
963 | default: | |
964 | parse_warn ("%s bit precision is not supported.", val); | |
965 | skip_to_rbrace (cfile, recordp); | |
966 | if (recordp) | |
967 | skip_to_semi (cfile); | |
968 | return 0; | |
969 | } | |
970 | break; | |
971 | case SIGNED: | |
972 | is_signed = 1; | |
973 | parse_signed: | |
974 | token = next_token (&val, cfile); | |
975 | if (token != INTEGER) { | |
976 | parse_warn ("expecting \"integer\" keyword."); | |
977 | skip_to_rbrace (cfile, recordp); | |
978 | if (recordp) | |
979 | skip_to_semi (cfile); | |
980 | return 0; | |
981 | } | |
982 | goto parse_integer; | |
983 | case UNSIGNED: | |
984 | is_signed = 0; | |
985 | goto parse_signed; | |
986 | ||
987 | case IP_ADDRESS: | |
988 | type = 'I'; | |
989 | break; | |
990 | case TEXT: | |
991 | type = 't'; | |
992 | no_arrays: | |
993 | if (arrayp) { | |
994 | parse_warn ("arrays of text strings not %s", | |
995 | "yet supported."); | |
996 | skip_to_rbrace (cfile, recordp); | |
997 | if (recordp) | |
998 | skip_to_semi (cfile); | |
999 | return 0; | |
1000 | } | |
1001 | no_more_in_record = 1; | |
1002 | break; | |
1003 | case STRING: | |
1004 | type = 'X'; | |
1005 | goto no_arrays; | |
1006 | ||
1007 | default: | |
1008 | parse_warn ("unknown data type %s", val); | |
1009 | skip_to_rbrace (cfile, recordp); | |
1010 | if (recordp) | |
1011 | skip_to_semi (cfile); | |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | if (tokix == sizeof tokbuf) { | |
1016 | parse_warn ("too many types in record."); | |
1017 | skip_to_rbrace (cfile, recordp); | |
1018 | if (recordp) | |
1019 | skip_to_semi (cfile); | |
1020 | return 0; | |
1021 | } | |
1022 | tokbuf [tokix++] = type; | |
1023 | ||
1024 | if (recordp) { | |
1025 | token = next_token (&val, cfile); | |
1026 | if (token == COMMA) { | |
1027 | if (no_more_in_record) { | |
1028 | parse_warn ("%s must be at end of record.", | |
1029 | type == 't' ? "text" : "string"); | |
1030 | skip_to_rbrace (cfile, 1); | |
1031 | if (recordp) | |
1032 | skip_to_semi (cfile); | |
1033 | return 0; | |
1034 | } | |
1035 | token = next_token (&val, cfile); | |
1036 | goto next_type; | |
1037 | } | |
1038 | if (token != RBRACE) { | |
1039 | parse_warn ("expecting right brace."); | |
1040 | skip_to_rbrace (cfile, 1); | |
1041 | if (recordp) | |
1042 | skip_to_semi (cfile); | |
1043 | return 0; | |
1044 | } | |
1045 | } | |
1046 | if (!parse_semi (cfile)) { | |
1047 | parse_warn ("semicolon expected."); | |
1048 | skip_to_semi (cfile); | |
1049 | if (recordp) | |
1050 | skip_to_semi (cfile); | |
1051 | return 0; | |
1052 | } | |
1053 | option -> format = dmalloc (tokix + arrayp + 1, | |
1054 | "parse_option_code_definition"); | |
1055 | if (!option -> format) | |
1056 | log_fatal ("no memory for option format."); | |
1057 | memcpy (option -> format, tokbuf, tokix); | |
1058 | if (arrayp) | |
1059 | option -> format [tokix++] = 'A'; | |
1060 | option -> format [tokix] = 0; | |
1061 | if (option -> universe -> options [option -> code]) { | |
1062 | /* XXX Free the option, but we can't do that now because they | |
1063 | XXX may start out static. */ | |
1064 | } | |
1065 | option -> universe -> options [option -> code] = option; | |
1066 | add_hash (option -> universe -> hash, | |
1067 | (unsigned char *)option -> name, 0, (unsigned char *)option); | |
1068 | return 1; | |
1069 | } | |
1070 | ||
be6be08d TL |
1071 | /* |
1072 | * colon-seperated-hex-list :== NUMBER | | |
1073 | * NUMBER COLON colon-seperated-hex-list | |
1074 | */ | |
1075 | ||
02a015fb TL |
1076 | int parse_cshl (data, cfile) |
1077 | struct data_string *data; | |
4761e04b | 1078 | FILE *cfile; |
4761e04b | 1079 | { |
c5b0f529 | 1080 | u_int8_t ibuf [128]; |
4761e04b TL |
1081 | int ilen = 0; |
1082 | int tlen = 0; | |
1083 | struct option_tag *sl = (struct option_tag *)0; | |
1084 | struct option_tag *next, **last = &sl; | |
02a015fb | 1085 | enum dhcp_token token; |
4761e04b | 1086 | char *val; |
02a015fb | 1087 | unsigned char *rvp; |
4761e04b TL |
1088 | |
1089 | do { | |
1090 | token = next_token (&val, cfile); | |
1091 | if (token != NUMBER && token != NUMBER_OR_NAME) { | |
1092 | parse_warn ("expecting hexadecimal number."); | |
1093 | skip_to_semi (cfile); | |
1094 | for (; sl; sl = next) { | |
1095 | next = sl -> next; | |
1096 | dfree (sl, "parse_cshl"); | |
1097 | } | |
02a015fb | 1098 | return 0; |
4761e04b TL |
1099 | } |
1100 | if (ilen == sizeof ibuf) { | |
1101 | next = (struct option_tag *) | |
1102 | dmalloc (ilen - 1 + | |
1103 | sizeof (struct option_tag), | |
1104 | "parse_cshl"); | |
1105 | if (!next) | |
8ae2d595 | 1106 | log_fatal ("no memory for string list."); |
4761e04b TL |
1107 | memcpy (next -> data, ibuf, ilen); |
1108 | *last = next; | |
1109 | last = &next -> next; | |
1110 | tlen += ilen; | |
1111 | ilen = 0; | |
1112 | } | |
1113 | convert_num (&ibuf [ilen++], val, 16, 8); | |
1114 | ||
1115 | token = peek_token (&val, cfile); | |
1116 | if (token != COLON) | |
1117 | break; | |
1118 | token = next_token (&val, cfile); | |
1119 | } while (1); | |
1120 | ||
02a015fb | 1121 | if (!buffer_allocate (&data -> buffer, tlen + ilen, "parse_cshl")) |
8ae2d595 | 1122 | log_fatal ("no memory to store octet data."); |
02a015fb TL |
1123 | data -> data = &data -> buffer -> data [0]; |
1124 | data -> len = tlen + ilen; | |
1125 | data -> terminated = 0; | |
1126 | ||
1127 | rvp = &data -> data [0]; | |
4761e04b TL |
1128 | while (sl) { |
1129 | next = sl -> next; | |
1130 | memcpy (rvp, sl -> data, sizeof ibuf); | |
1131 | rvp += sizeof ibuf; | |
1132 | dfree (sl, "parse_cshl"); | |
1133 | sl = next; | |
1134 | } | |
1135 | ||
1136 | memcpy (rvp, ibuf, ilen); | |
02a015fb | 1137 | return 1; |
4761e04b | 1138 | } |
be6be08d TL |
1139 | |
1140 | /* | |
1141 | * executable-statements :== executable-statement executable-statements | | |
1142 | * executable-statement | |
1143 | * | |
1144 | * executable-statement :== | |
1145 | * IF if-statement | | |
1146 | * ADD class-name SEMI | | |
1147 | * BREAK SEMI | | |
1148 | * OPTION option-parameter SEMI | | |
1149 | * SUPERSEDE option-parameter SEMI | | |
1150 | * PREPEND option-parameter SEMI | | |
1151 | * APPEND option-parameter SEMI | |
1152 | */ | |
1153 | ||
1154 | struct executable_statement *parse_executable_statements (cfile, lose) | |
1155 | FILE *cfile; | |
1156 | int *lose; | |
1157 | { | |
1158 | struct executable_statement *head, **next; | |
1159 | ||
1160 | next = &head; | |
1161 | while ((*next = parse_executable_statement (cfile, lose))) | |
1162 | next = &((*next) -> next); | |
02a015fb | 1163 | if (!*lose) |
be6be08d TL |
1164 | return head; |
1165 | return (struct executable_statement *)0; | |
1166 | } | |
1167 | ||
1168 | struct executable_statement *parse_executable_statement (cfile, lose) | |
1169 | FILE *cfile; | |
1170 | int *lose; | |
1171 | { | |
02a015fb | 1172 | enum dhcp_token token; |
be6be08d TL |
1173 | char *val; |
1174 | struct executable_statement *stmt, base; | |
1175 | struct class *cta; | |
1176 | struct option *option; | |
b1013db7 | 1177 | struct option_cache *cache; |
be6be08d | 1178 | |
b1013db7 TL |
1179 | token = peek_token (&val, cfile); |
1180 | switch (token) { | |
be6be08d | 1181 | case IF: |
dce70f9f | 1182 | next_token (&val, cfile); |
be6be08d TL |
1183 | stmt = parse_if_statement (cfile, lose); |
1184 | return stmt; | |
eb018e2b | 1185 | case TOKEN_ADD: |
efc79acb | 1186 | token = next_token (&val, cfile); |
be6be08d TL |
1187 | token = next_token (&val, cfile); |
1188 | if (token != STRING) { | |
1189 | parse_warn ("expecting class name."); | |
1190 | skip_to_semi (cfile); | |
1191 | *lose = 1; | |
1192 | return (struct executable_statement *)0; | |
1193 | } | |
1194 | cta = find_class (val); | |
1195 | if (!cta) { | |
1196 | parse_warn ("unknown class %s.", val); | |
1197 | skip_to_semi (cfile); | |
1198 | *lose = 1; | |
1199 | return (struct executable_statement *)0; | |
1200 | } | |
1201 | if (!parse_semi (cfile)) { | |
1202 | *lose = 1; | |
1203 | return (struct executable_statement *)0; | |
1204 | } | |
1205 | memset (&base, 0, sizeof base); | |
1206 | base.op = add_statement; | |
1207 | base.data.add = cta; | |
1208 | break; | |
1209 | ||
1210 | case BREAK: | |
1211 | token = next_token (&val, cfile); | |
1212 | if (!parse_semi (cfile)) { | |
1213 | *lose = 1; | |
1214 | return (struct executable_statement *)0; | |
1215 | } | |
1216 | memset (&base, 0, sizeof base); | |
1217 | base.op = break_statement; | |
1218 | break; | |
1219 | ||
25541f2f TL |
1220 | case SEND: |
1221 | *lose = 1; | |
1222 | parse_warn ("send not appropriate here."); | |
1223 | skip_to_semi (cfile); | |
1224 | return (struct executable_statement *)0; | |
1225 | ||
1226 | case SUPERSEDE: | |
be6be08d TL |
1227 | case OPTION: |
1228 | token = next_token (&val, cfile); | |
6b4b0ec7 | 1229 | option = parse_option_name (cfile, 0); |
be6be08d TL |
1230 | if (!option) { |
1231 | *lose = 1; | |
1232 | return (struct executable_statement *)0; | |
1233 | } | |
1234 | return parse_option_statement (cfile, 1, option, | |
1235 | supersede_option_statement); | |
1236 | ||
b1013db7 TL |
1237 | case ALLOW: |
1238 | case DENY: | |
1239 | token = next_token (&val, cfile); | |
1240 | cache = (struct option_cache *)0; | |
1241 | if (!parse_allow_deny (&cache, cfile, | |
1242 | token == ALLOW ? 1 : 0)) | |
1243 | return (struct executable_statement *)0; | |
1244 | memset (&base, 0, sizeof base); | |
1245 | base.op = supersede_option_statement; | |
1246 | base.data.option = cache; | |
1247 | break; | |
1248 | ||
be6be08d TL |
1249 | case DEFAULT: |
1250 | token = next_token (&val, cfile); | |
6b4b0ec7 | 1251 | option = parse_option_name (cfile, 0); |
be6be08d TL |
1252 | if (!option) { |
1253 | *lose = 1; | |
1254 | return (struct executable_statement *)0; | |
1255 | } | |
1256 | return parse_option_statement (cfile, 1, option, | |
1257 | default_option_statement); | |
1258 | ||
1259 | case PREPEND: | |
1260 | token = next_token (&val, cfile); | |
6b4b0ec7 | 1261 | option = parse_option_name (cfile, 0); |
be6be08d TL |
1262 | if (!option) { |
1263 | *lose = 1; | |
1264 | return (struct executable_statement *)0; | |
1265 | } | |
1266 | return parse_option_statement (cfile, 1, option, | |
1267 | prepend_option_statement); | |
1268 | ||
1269 | case APPEND: | |
1270 | token = next_token (&val, cfile); | |
6b4b0ec7 | 1271 | option = parse_option_name (cfile, 0); |
be6be08d TL |
1272 | if (!option) { |
1273 | *lose = 1; | |
1274 | return (struct executable_statement *)0; | |
1275 | } | |
1276 | return parse_option_statement (cfile, 1, option, | |
1277 | append_option_statement); | |
1278 | ||
1279 | default: | |
1280 | *lose = 0; | |
1281 | return (struct executable_statement *)0; | |
1282 | } | |
1283 | ||
1284 | stmt = ((struct executable_statement *) | |
1285 | dmalloc (sizeof (struct executable_statement), | |
1286 | "parse_executable_statement")); | |
1287 | if (!stmt) | |
8ae2d595 | 1288 | log_fatal ("no memory for new statement."); |
be6be08d TL |
1289 | *stmt = base; |
1290 | return stmt; | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * if-statement :== boolean-expression LBRACE executable-statements RBRACE | |
1295 | * else-statement | |
1296 | * | |
1297 | * else-statement :== <null> | | |
1298 | * ELSE LBRACE executable-statements RBRACE | | |
1299 | * ELSE IF if-statement | | |
1300 | * ELSIF if-statement | |
1301 | */ | |
1302 | ||
1303 | struct executable_statement *parse_if_statement (cfile, lose) | |
1304 | FILE *cfile; | |
1305 | int *lose; | |
1306 | { | |
02a015fb | 1307 | enum dhcp_token token; |
be6be08d TL |
1308 | char *val; |
1309 | struct executable_statement *stmt; | |
1310 | struct expression *if_condition; | |
1311 | struct executable_statement *true, *false; | |
1312 | ||
02a015fb TL |
1313 | if_condition = (struct expression *)0; |
1314 | if (!parse_boolean_expression (&if_condition, cfile, lose)) { | |
be6be08d TL |
1315 | if (!*lose) |
1316 | parse_warn ("boolean expression expected."); | |
1317 | return (struct executable_statement *)0; | |
1318 | } | |
02a015fb TL |
1319 | #if defined (DEBUG_EXPRESSION_PARSE) |
1320 | print_expression ("if condition", if_condition); | |
1321 | #endif | |
be6be08d TL |
1322 | token = next_token (&val, cfile); |
1323 | if (token != LBRACE) { | |
1324 | parse_warn ("left brace expected."); | |
1325 | skip_to_semi (cfile); | |
1326 | *lose = 1; | |
1327 | return (struct executable_statement *)0; | |
1328 | } | |
1329 | true = parse_executable_statements (cfile, lose); | |
be6be08d | 1330 | token = next_token (&val, cfile); |
efc79acb TL |
1331 | if (*lose) { |
1332 | /* Try to even things up. */ | |
1333 | do { | |
1334 | token = next_token (&val, cfile); | |
1335 | } while (token != EOF && token != RBRACE); | |
1336 | return (struct executable_statement *)0; | |
1337 | } | |
be6be08d TL |
1338 | if (token != RBRACE) { |
1339 | parse_warn ("right brace expected."); | |
1340 | skip_to_semi (cfile); | |
1341 | *lose = 1; | |
1342 | return (struct executable_statement *)0; | |
1343 | } | |
1344 | token = peek_token (&val, cfile); | |
1345 | if (token == ELSE) { | |
1346 | token = next_token (&val, cfile); | |
1347 | token = peek_token (&val, cfile); | |
1348 | if (token == IF) { | |
1349 | token = next_token (&val, cfile); | |
1350 | false = parse_if_statement (cfile, lose); | |
1351 | if (*lose) | |
1352 | return (struct executable_statement *)0; | |
1353 | } else if (token != LBRACE) { | |
1354 | parse_warn ("left brace or if expected."); | |
1355 | skip_to_semi (cfile); | |
1356 | *lose = 1; | |
1357 | return (struct executable_statement *)0; | |
1358 | } else { | |
1359 | token = next_token (&val, cfile); | |
25541f2f | 1360 | false = parse_executable_statements (cfile, lose); |
be6be08d TL |
1361 | if (*lose) |
1362 | return (struct executable_statement *)0; | |
25541f2f TL |
1363 | token = next_token (&val, cfile); |
1364 | if (token != RBRACE) { | |
1365 | parse_warn ("right brace expected."); | |
1366 | skip_to_semi (cfile); | |
1367 | *lose = 1; | |
1368 | return (struct executable_statement *)0; | |
1369 | } | |
be6be08d TL |
1370 | } |
1371 | } else if (token == ELSIF) { | |
1372 | token = next_token (&val, cfile); | |
1373 | false = parse_if_statement (cfile, lose); | |
1374 | if (*lose) | |
1375 | return (struct executable_statement *)0; | |
1376 | } else | |
1377 | false = (struct executable_statement *)0; | |
1378 | ||
1379 | stmt = ((struct executable_statement *) | |
1380 | dmalloc (sizeof (struct executable_statement), | |
1381 | "parse_if_statement")); | |
1382 | if (!stmt) | |
8ae2d595 | 1383 | log_fatal ("no memory for if statement."); |
be6be08d TL |
1384 | memset (stmt, 0, sizeof *stmt); |
1385 | stmt -> op = if_statement; | |
1386 | stmt -> data.ie.expr = if_condition; | |
1387 | stmt -> data.ie.true = true; | |
1388 | stmt -> data.ie.false = false; | |
1389 | return stmt; | |
1390 | } | |
1391 | ||
1392 | /* | |
1393 | * boolean_expression :== CHECK STRING | | |
1394 | * NOT boolean-expression | | |
1395 | * data-expression EQUAL data-expression | | |
1396 | * boolean-expression AND boolean-expression | | |
1397 | * boolean-expression OR boolean-expression | |
02a015fb | 1398 | * EXISTS OPTION-NAME |
be6be08d TL |
1399 | */ |
1400 | ||
02a015fb TL |
1401 | int parse_boolean_expression (expr, cfile, lose) |
1402 | struct expression **expr; | |
1403 | FILE *cfile; | |
1404 | int *lose; | |
1405 | { | |
1406 | /* Parse an expression... */ | |
1407 | if (!parse_expression (expr, cfile, lose, context_boolean, | |
1408 | (struct expression **)0, expr_none)) | |
1409 | return 0; | |
1410 | ||
1411 | if (!is_boolean_expression (*expr)) { | |
1412 | parse_warn ("Expecting a boolean expression."); | |
1413 | *lose = 1; | |
1414 | return 0; | |
1415 | } | |
1416 | return 1; | |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * data_expression :== SUBSTRING LPAREN data-expression COMMA | |
1421 | * numeric-expression COMMA | |
1422 | * numeric-expression RPAREN | | |
a82abfc7 TL |
1423 | * CONCAT LPAREN data-expression COMMA |
1424 | data-expression RPAREN | |
02a015fb | 1425 | * SUFFIX LPAREN data_expression COMMA |
a82abfc7 | 1426 | * numeric-expression RPAREN | |
02a015fb TL |
1427 | * OPTION option_name | |
1428 | * HARDWARE | | |
1429 | * PACKET LPAREN numeric-expression COMMA | |
1430 | * numeric-expression RPAREN | | |
1431 | * STRING | | |
1432 | * colon_seperated_hex_list | |
1433 | */ | |
1434 | ||
1435 | int parse_data_expression (expr, cfile, lose) | |
1436 | struct expression **expr; | |
1437 | FILE *cfile; | |
1438 | int *lose; | |
1439 | { | |
1440 | /* Parse an expression... */ | |
1441 | if (!parse_expression (expr, cfile, lose, context_data, | |
1442 | (struct expression **)0, expr_none)) | |
1443 | return 0; | |
1444 | ||
1445 | if (!is_data_expression (*expr)) { | |
1446 | parse_warn ("Expecting a data expression."); | |
1447 | *lose = 1; | |
1448 | return 0; | |
1449 | } | |
1450 | return 1; | |
1451 | } | |
1452 | ||
1453 | /* | |
1454 | * numeric-expression :== EXTRACT_INT LPAREN data-expression | |
1455 | * COMMA number RPAREN | | |
1456 | * NUMBER | |
1457 | */ | |
1458 | ||
1459 | int parse_numeric_expression (expr, cfile, lose) | |
1460 | struct expression **expr; | |
1461 | FILE *cfile; | |
1462 | int *lose; | |
1463 | { | |
1464 | /* Parse an expression... */ | |
1465 | if (!parse_expression (expr, cfile, lose, context_numeric, | |
1466 | (struct expression **)0, expr_none)) | |
1467 | return 0; | |
1468 | ||
1469 | if (!is_numeric_expression (*expr)) { | |
1470 | parse_warn ("Expecting a numeric expression."); | |
1471 | *lose = 1; | |
1472 | return 0; | |
1473 | } | |
1474 | return 1; | |
1475 | } | |
1476 | ||
1477 | /* Parse a subexpression that does not contain a binary operator. */ | |
be6be08d | 1478 | |
02a015fb TL |
1479 | int parse_non_binary (expr, cfile, lose, context) |
1480 | struct expression **expr; | |
be6be08d TL |
1481 | FILE *cfile; |
1482 | int *lose; | |
02a015fb | 1483 | enum expression_context context; |
be6be08d | 1484 | { |
02a015fb | 1485 | enum dhcp_token token; |
be6be08d TL |
1486 | char *val; |
1487 | struct collection *col; | |
02a015fb | 1488 | struct option *option; |
be6be08d TL |
1489 | |
1490 | token = peek_token (&val, cfile); | |
1491 | ||
1492 | /* Check for unary operators... */ | |
1493 | switch (token) { | |
1494 | case CHECK: | |
1495 | token = next_token (&val, cfile); | |
1496 | token = next_token (&val, cfile); | |
1497 | if (token != STRING) { | |
1498 | parse_warn ("string expected."); | |
1499 | skip_to_semi (cfile); | |
1500 | *lose = 1; | |
02a015fb | 1501 | return 0; |
be6be08d TL |
1502 | } |
1503 | for (col = collections; col; col = col -> next) | |
1504 | if (!strcmp (col -> name, val)) | |
1505 | break; | |
1506 | if (!col) { | |
1507 | parse_warn ("unknown collection."); | |
1508 | *lose = 1; | |
02a015fb | 1509 | return 0; |
be6be08d | 1510 | } |
02a015fb | 1511 | if (!expression_allocate (expr, "parse_expression: CHECK")) |
8ae2d595 | 1512 | log_fatal ("can't allocate expression"); |
02a015fb TL |
1513 | (*expr) -> op = expr_check; |
1514 | (*expr) -> data.check = col; | |
1515 | break; | |
be6be08d TL |
1516 | |
1517 | case NOT: | |
1518 | token = next_token (&val, cfile); | |
02a015fb | 1519 | if (!expression_allocate (expr, "parse_expression: NOT")) |
8ae2d595 | 1520 | log_fatal ("can't allocate expression"); |
02a015fb TL |
1521 | (*expr) -> op = expr_not; |
1522 | if (!parse_non_binary (&(*expr) -> data.not, | |
1523 | cfile, lose, context)) { | |
be6be08d | 1524 | if (!*lose) { |
02a015fb | 1525 | parse_warn ("expression expected"); |
be6be08d TL |
1526 | skip_to_semi (cfile); |
1527 | } | |
1528 | *lose = 1; | |
02a015fb TL |
1529 | expression_dereference (expr, "parse_expression: NOT"); |
1530 | return 0; | |
be6be08d | 1531 | } |
be6be08d | 1532 | break; |
be6be08d | 1533 | |
02a015fb TL |
1534 | case EXISTS: |
1535 | token = next_token (&val, cfile); | |
1536 | if (!expression_allocate (expr, "parse_expression: EXISTS")) | |
8ae2d595 | 1537 | log_fatal ("can't allocate expression"); |
02a015fb | 1538 | (*expr) -> op = expr_exists; |
6b4b0ec7 | 1539 | (*expr) -> data.option = parse_option_name (cfile, 0); |
02a015fb TL |
1540 | if (!(*expr) -> data.option) { |
1541 | *lose = 1; | |
1542 | expression_dereference (expr, | |
1543 | "parse_expression: EXISTS"); | |
1544 | return 0; | |
be6be08d | 1545 | } |
02a015fb | 1546 | break; |
be6be08d | 1547 | |
70330633 TL |
1548 | case KNOWN: |
1549 | token = next_token (&val, cfile); | |
1550 | if (!expression_allocate (expr, "parse_expression: EXISTS")) | |
1551 | log_fatal ("can't allocate expression"); | |
1552 | (*expr) -> op = expr_known; | |
1553 | break; | |
1554 | ||
be6be08d TL |
1555 | case SUBSTRING: |
1556 | token = next_token (&val, cfile); | |
02a015fb | 1557 | if (!expression_allocate (expr, "parse_expression: SUBSTRING")) |
8ae2d595 | 1558 | log_fatal ("can't allocate expression"); |
02a015fb | 1559 | (*expr) -> op = expr_substring; |
be6be08d TL |
1560 | |
1561 | token = next_token (&val, cfile); | |
1562 | if (token != LPAREN) { | |
1563 | nolparen: | |
02a015fb TL |
1564 | expression_dereference (expr, |
1565 | "parse_expression: nolparen"); | |
be6be08d TL |
1566 | parse_warn ("left parenthesis expected."); |
1567 | *lose = 1; | |
02a015fb | 1568 | return 0; |
be6be08d TL |
1569 | } |
1570 | ||
02a015fb TL |
1571 | if (!parse_data_expression (&(*expr) -> data.substring.expr, |
1572 | cfile, lose)) { | |
be6be08d | 1573 | nodata: |
02a015fb TL |
1574 | expression_dereference (expr, |
1575 | "parse_expression: nodata"); | |
be6be08d TL |
1576 | parse_warn ("expecting data expression."); |
1577 | skip_to_semi (cfile); | |
1578 | *lose = 1; | |
02a015fb | 1579 | return 0; |
be6be08d TL |
1580 | } |
1581 | ||
1582 | token = next_token (&val, cfile); | |
1583 | if (token != COMMA) { | |
1584 | nocomma: | |
02a015fb TL |
1585 | expression_dereference (expr, |
1586 | "parse_expression: nocomma1"); | |
be6be08d TL |
1587 | parse_warn ("comma expected."); |
1588 | *lose = 1; | |
02a015fb TL |
1589 | |
1590 | return 0; | |
be6be08d TL |
1591 | } |
1592 | ||
02a015fb TL |
1593 | if (!parse_numeric_expression |
1594 | (&(*expr) -> data.substring.offset,cfile, lose)) { | |
be6be08d TL |
1595 | nonum: |
1596 | if (!*lose) { | |
1597 | parse_warn ("expecting numeric expression."); | |
1598 | skip_to_semi (cfile); | |
1599 | *lose = 1; | |
1600 | } | |
02a015fb TL |
1601 | expression_dereference (expr, |
1602 | "parse_expression: nonum"); | |
1603 | return 0; | |
be6be08d TL |
1604 | } |
1605 | ||
1606 | token = next_token (&val, cfile); | |
1607 | if (token != COMMA) | |
1608 | goto nocomma; | |
1609 | ||
02a015fb TL |
1610 | if (!parse_numeric_expression |
1611 | (&(*expr) -> data.substring.len, cfile, lose)) | |
be6be08d TL |
1612 | goto nonum; |
1613 | ||
1614 | token = next_token (&val, cfile); | |
1615 | if (token != RPAREN) { | |
1616 | norparen: | |
1617 | parse_warn ("right parenthesis expected."); | |
1618 | *lose = 1; | |
02a015fb TL |
1619 | expression_dereference (expr, |
1620 | "parse_expression: norparen"); | |
1621 | return 0; | |
be6be08d | 1622 | } |
02a015fb | 1623 | break; |
be6be08d TL |
1624 | |
1625 | case SUFFIX: | |
1626 | token = next_token (&val, cfile); | |
02a015fb | 1627 | if (!expression_allocate (expr, "parse_expression: SUFFIX")) |
8ae2d595 | 1628 | log_fatal ("can't allocate expression"); |
02a015fb | 1629 | (*expr) -> op = expr_suffix; |
be6be08d TL |
1630 | |
1631 | token = next_token (&val, cfile); | |
1632 | if (token != LPAREN) | |
1633 | goto nolparen; | |
1634 | ||
02a015fb TL |
1635 | if (!parse_data_expression (&(*expr) -> data.suffix.expr, |
1636 | cfile, lose)) | |
be6be08d TL |
1637 | goto nodata; |
1638 | ||
1639 | token = next_token (&val, cfile); | |
1640 | if (token != COMMA) | |
1641 | goto nocomma; | |
1642 | ||
02a015fb TL |
1643 | if (!parse_data_expression (&(*expr) -> data.suffix.len, |
1644 | cfile, lose)) | |
be6be08d TL |
1645 | goto nonum; |
1646 | ||
1647 | token = next_token (&val, cfile); | |
1648 | if (token != RPAREN) | |
1649 | goto norparen; | |
02a015fb | 1650 | break; |
be6be08d | 1651 | |
a82abfc7 TL |
1652 | case CONCAT: |
1653 | token = next_token (&val, cfile); | |
1654 | if (!expression_allocate (expr, "parse_expression: CONCAT")) | |
1655 | log_fatal ("can't allocate expression"); | |
1656 | (*expr) -> op = expr_concat; | |
1657 | ||
1658 | token = next_token (&val, cfile); | |
1659 | if (token != LPAREN) | |
1660 | goto nolparen; | |
1661 | ||
1662 | if (!parse_data_expression (&(*expr) -> data.concat [0], | |
1663 | cfile, lose)) | |
1664 | goto nodata; | |
1665 | ||
1666 | token = next_token (&val, cfile); | |
1667 | if (token != COMMA) | |
1668 | goto nocomma; | |
1669 | ||
1670 | if (!parse_data_expression (&(*expr) -> data.concat [1], | |
1671 | cfile, lose)) | |
1672 | goto nodata; | |
1673 | ||
1674 | token = next_token (&val, cfile); | |
1675 | if (token != RPAREN) | |
1676 | goto norparen; | |
1677 | break; | |
1678 | ||
da38df14 TL |
1679 | case BINARY_TO_ASCII: |
1680 | token = next_token (&val, cfile); | |
1681 | if (!expression_allocate (expr, "parse_expression: B2A")) | |
1682 | log_fatal ("can't allocate expression"); | |
eb42f00e | 1683 | (*expr) -> op = expr_binary_to_ascii; |
da38df14 TL |
1684 | |
1685 | token = next_token (&val, cfile); | |
1686 | if (token != LPAREN) | |
1687 | goto nolparen; | |
1688 | ||
1689 | if (!parse_numeric_expression (&(*expr) -> data.b2a.base, | |
1690 | cfile, lose)) | |
1691 | goto nodata; | |
1692 | ||
1693 | token = next_token (&val, cfile); | |
1694 | if (token != COMMA) | |
1695 | goto nocomma; | |
1696 | ||
1697 | if (!parse_numeric_expression (&(*expr) -> data.b2a.width, | |
1698 | cfile, lose)) | |
1699 | goto nodata; | |
1700 | ||
1701 | token = next_token (&val, cfile); | |
1702 | if (token != COMMA) | |
1703 | goto nocomma; | |
1704 | ||
1705 | if (!parse_data_expression (&(*expr) -> data.b2a.seperator, | |
1706 | cfile, lose)) | |
1707 | goto nodata; | |
1708 | ||
1709 | token = next_token (&val, cfile); | |
1710 | if (token != COMMA) | |
1711 | goto nocomma; | |
1712 | ||
1713 | if (!parse_data_expression (&(*expr) -> data.b2a.buffer, | |
1714 | cfile, lose)) | |
1715 | goto nodata; | |
1716 | ||
1717 | token = next_token (&val, cfile); | |
1718 | if (token != RPAREN) | |
1719 | goto norparen; | |
1720 | break; | |
1721 | ||
1722 | case REVERSE: | |
1723 | token = next_token (&val, cfile); | |
1724 | if (!expression_allocate (expr, "parse_expression: REVERSE")) | |
1725 | log_fatal ("can't allocate expression"); | |
eb42f00e | 1726 | (*expr) -> op = expr_reverse; |
da38df14 TL |
1727 | |
1728 | token = next_token (&val, cfile); | |
1729 | if (token != LPAREN) | |
1730 | goto nolparen; | |
1731 | ||
1732 | if (!(parse_numeric_expression | |
1733 | (&(*expr) -> data.reverse.width, cfile, lose))) | |
1734 | goto nodata; | |
1735 | ||
1736 | token = next_token (&val, cfile); | |
1737 | if (token != COMMA) | |
1738 | goto nocomma; | |
1739 | ||
1740 | if (!(parse_data_expression | |
1741 | (&(*expr) -> data.reverse.buffer, cfile, lose))) | |
1742 | goto nodata; | |
1743 | ||
1744 | token = next_token (&val, cfile); | |
1745 | if (token != RPAREN) | |
1746 | goto norparen; | |
1747 | break; | |
1748 | ||
be6be08d TL |
1749 | case OPTION: |
1750 | token = next_token (&val, cfile); | |
02a015fb | 1751 | if (!expression_allocate (expr, "parse_expression: OPTION")) |
8ae2d595 | 1752 | log_fatal ("can't allocate expression"); |
02a015fb | 1753 | (*expr) -> op = expr_option; |
6b4b0ec7 | 1754 | (*expr) -> data.option = parse_option_name (cfile, 0); |
02a015fb | 1755 | if (!(*expr) -> data.option) { |
be6be08d | 1756 | *lose = 1; |
02a015fb TL |
1757 | expression_dereference (expr, |
1758 | "parse_expression: OPTION"); | |
1759 | return 0; | |
be6be08d | 1760 | } |
02a015fb | 1761 | break; |
be6be08d TL |
1762 | |
1763 | case HARDWARE: | |
1764 | token = next_token (&val, cfile); | |
02a015fb | 1765 | if (!expression_allocate (expr, "parse_expression: HARDWARE")) |
8ae2d595 | 1766 | log_fatal ("can't allocate expression"); |
02a015fb TL |
1767 | (*expr) -> op = expr_hardware; |
1768 | break; | |
be6be08d | 1769 | |
da38df14 TL |
1770 | case LEASED_ADDRESS: |
1771 | token = next_token (&val, cfile); | |
1772 | if (!expression_allocate (expr, | |
1773 | "parse_expression: LEASED_ADDRESS")) | |
1774 | log_fatal ("can't allocate expression"); | |
1775 | (*expr) -> op = expr_leased_address; | |
1776 | break; | |
1777 | ||
be6be08d TL |
1778 | case PACKET: |
1779 | token = next_token (&val, cfile); | |
02a015fb | 1780 | if (!expression_allocate (expr, "parse_expression: PACKET")) |
8ae2d595 | 1781 | log_fatal ("can't allocate expression"); |
02a015fb | 1782 | (*expr) -> op = expr_packet; |
be6be08d TL |
1783 | |
1784 | token = next_token (&val, cfile); | |
1785 | if (token != LPAREN) | |
1786 | goto nolparen; | |
1787 | ||
02a015fb TL |
1788 | if (!parse_numeric_expression (&(*expr) -> data.packet.offset, |
1789 | cfile, lose)) | |
be6be08d TL |
1790 | goto nonum; |
1791 | ||
1792 | token = next_token (&val, cfile); | |
1793 | if (token != COMMA) | |
1794 | goto nocomma; | |
1795 | ||
02a015fb TL |
1796 | if (!parse_numeric_expression (&(*expr) -> data.packet.len, |
1797 | cfile, lose)) | |
be6be08d TL |
1798 | goto nonum; |
1799 | ||
1800 | token = next_token (&val, cfile); | |
1801 | if (token != RPAREN) | |
1802 | goto norparen; | |
02a015fb | 1803 | break; |
be6be08d TL |
1804 | |
1805 | case STRING: | |
1806 | token = next_token (&val, cfile); | |
c5b0f529 TL |
1807 | if (!make_const_data (expr, (unsigned char *)val, |
1808 | strlen (val), 1, 1)) | |
8ae2d595 | 1809 | log_fatal ("can't make constant string expression."); |
02a015fb | 1810 | break; |
be6be08d | 1811 | |
be6be08d TL |
1812 | case EXTRACT_INT: |
1813 | token = next_token (&val, cfile); | |
be6be08d TL |
1814 | token = next_token (&val, cfile); |
1815 | if (token != LPAREN) { | |
1816 | parse_warn ("left parenthesis expected."); | |
1817 | *lose = 1; | |
02a015fb | 1818 | return 0; |
be6be08d TL |
1819 | } |
1820 | ||
02a015fb TL |
1821 | if (!expression_allocate (expr, |
1822 | "parse_expression: EXTRACT_INT")) | |
8ae2d595 | 1823 | log_fatal ("can't allocate expression"); |
02a015fb TL |
1824 | |
1825 | if (!parse_data_expression (&(*expr) -> data.extract_int, | |
1826 | cfile, lose)) { | |
be6be08d TL |
1827 | parse_warn ("expecting data expression."); |
1828 | skip_to_semi (cfile); | |
1829 | *lose = 1; | |
02a015fb TL |
1830 | expression_dereference |
1831 | (expr, "parse_expression: EXTRACT_INT"); | |
1832 | return 0; | |
be6be08d TL |
1833 | } |
1834 | ||
1835 | token = next_token (&val, cfile); | |
1836 | if (token != COMMA) { | |
1837 | parse_warn ("comma expected."); | |
1838 | *lose = 1; | |
02a015fb | 1839 | return 0; |
be6be08d TL |
1840 | } |
1841 | ||
1842 | token = next_token (&val, cfile); | |
1843 | if (token != NUMBER) { | |
1844 | parse_warn ("number expected."); | |
1845 | *lose = 1; | |
02a015fb | 1846 | return 0; |
be6be08d | 1847 | } |
be6be08d TL |
1848 | switch (atoi (val)) { |
1849 | case 8: | |
02a015fb | 1850 | (*expr) -> op = expr_extract_int8; |
be6be08d TL |
1851 | break; |
1852 | ||
1853 | case 16: | |
02a015fb | 1854 | (*expr) -> op = expr_extract_int16; |
be6be08d TL |
1855 | break; |
1856 | ||
1857 | case 32: | |
02a015fb | 1858 | (*expr) -> op = expr_extract_int32; |
be6be08d TL |
1859 | break; |
1860 | ||
1861 | default: | |
1862 | parse_warn ("unsupported integer size %d", atoi (val)); | |
1863 | *lose = 1; | |
1864 | skip_to_semi (cfile); | |
02a015fb TL |
1865 | expression_dereference |
1866 | (expr, "parse_expression: EXTRACT_INT"); | |
1867 | return 0; | |
be6be08d TL |
1868 | } |
1869 | ||
1870 | token = next_token (&val, cfile); | |
1871 | if (token != RPAREN) { | |
1872 | parse_warn ("right parenthesis expected."); | |
1873 | *lose = 1; | |
02a015fb | 1874 | return 0; |
be6be08d | 1875 | } |
02a015fb | 1876 | break; |
be6be08d | 1877 | |
20c4e94d TL |
1878 | case ENCODE_INT: |
1879 | token = next_token (&val, cfile); | |
1880 | token = next_token (&val, cfile); | |
1881 | if (token != LPAREN) { | |
1882 | parse_warn ("left parenthesis expected."); | |
1883 | *lose = 1; | |
1884 | return 0; | |
1885 | } | |
1886 | ||
1887 | if (!expression_allocate (expr, | |
1888 | "parse_expression: ENCODE_INT")) | |
1889 | log_fatal ("can't allocate expression"); | |
1890 | ||
1891 | if (!parse_numeric_expression (&(*expr) -> data.encode_int, | |
1892 | cfile, lose)) { | |
1893 | parse_warn ("expecting numeric expression."); | |
1894 | skip_to_semi (cfile); | |
1895 | *lose = 1; | |
1896 | expression_dereference | |
1897 | (expr, "parse_expression: ENCODE_INT"); | |
1898 | return 0; | |
1899 | } | |
1900 | ||
1901 | token = next_token (&val, cfile); | |
1902 | if (token != COMMA) { | |
1903 | parse_warn ("comma expected."); | |
1904 | *lose = 1; | |
1905 | return 0; | |
1906 | } | |
1907 | ||
1908 | token = next_token (&val, cfile); | |
1909 | if (token != NUMBER) { | |
1910 | parse_warn ("number expected."); | |
1911 | *lose = 1; | |
1912 | return 0; | |
1913 | } | |
1914 | switch (atoi (val)) { | |
1915 | case 8: | |
1916 | (*expr) -> op = expr_encode_int8; | |
1917 | break; | |
1918 | ||
1919 | case 16: | |
1920 | (*expr) -> op = expr_encode_int16; | |
1921 | break; | |
1922 | ||
1923 | case 32: | |
1924 | (*expr) -> op = expr_encode_int32; | |
1925 | break; | |
1926 | ||
1927 | default: | |
1928 | parse_warn ("unsupported integer size %d", atoi (val)); | |
1929 | *lose = 1; | |
1930 | skip_to_semi (cfile); | |
1931 | expression_dereference | |
1932 | (expr, "parse_expression: ENCODE_INT"); | |
1933 | return 0; | |
1934 | } | |
1935 | ||
1936 | token = next_token (&val, cfile); | |
1937 | if (token != RPAREN) { | |
1938 | parse_warn ("right parenthesis expected."); | |
1939 | *lose = 1; | |
1940 | return 0; | |
1941 | } | |
1942 | break; | |
1943 | ||
be6be08d | 1944 | case NUMBER: |
02a015fb TL |
1945 | /* If we're in a numeric context, this should just be a |
1946 | number, by itself. */ | |
1947 | if (context == context_numeric) { | |
1948 | next_token (&val, cfile); /* Eat the number. */ | |
be19167d TL |
1949 | if (!expression_allocate (expr, |
1950 | "parse_expression: NUMBER")) | |
1951 | log_fatal ("can't allocate expression"); | |
02a015fb TL |
1952 | (*expr) -> op = expr_const_int; |
1953 | (*expr) -> data.const_int = atoi (val); | |
1954 | break; | |
1955 | } | |
be6be08d | 1956 | |
02a015fb | 1957 | case NUMBER_OR_NAME: |
be19167d TL |
1958 | if (!expression_allocate (expr, |
1959 | "parse_expression: NUMBER_OR_NAME")) | |
1960 | log_fatal ("can't allocate expression"); | |
1961 | ||
02a015fb TL |
1962 | (*expr) -> op = expr_const_data; |
1963 | if (!parse_cshl (&(*expr) -> data.const_data, cfile)) { | |
1964 | expression_dereference (expr, | |
1965 | "parse_expression: cshl"); | |
1966 | return 0; | |
1967 | } | |
1968 | break; | |
1969 | ||
1970 | /* Not a valid start to an expression... */ | |
be6be08d | 1971 | default: |
02a015fb | 1972 | return 0; |
be6be08d | 1973 | } |
02a015fb | 1974 | return 1; |
be6be08d TL |
1975 | } |
1976 | ||
02a015fb TL |
1977 | /* Parse an expression. */ |
1978 | ||
1979 | int parse_expression (expr, cfile, lose, context, plhs, binop) | |
1980 | struct expression **expr; | |
1981 | FILE *cfile; | |
1982 | int *lose; | |
1983 | enum expression_context context; | |
1984 | struct expression **plhs; | |
1985 | enum expr_op binop; | |
1986 | { | |
1987 | enum dhcp_token token; | |
1988 | char *val; | |
1989 | struct expression *rhs = (struct expression *)0, *tmp; | |
1990 | struct expression *lhs; | |
1991 | enum expr_op next_op; | |
1992 | ||
1993 | /* Consume the left hand side we were passed. */ | |
1994 | if (plhs) { | |
1995 | lhs = *plhs; | |
1996 | *plhs = (struct expression *)0; | |
1997 | } else | |
1998 | lhs = (struct expression *)0; | |
1999 | ||
2000 | new_rhs: | |
2001 | if (!parse_non_binary (&rhs, cfile, lose, context)) { | |
2002 | /* If we already have a left-hand side, then it's not | |
2003 | okay for there not to be a right-hand side here, so | |
2004 | we need to flag it as an error. */ | |
2005 | if (lhs) { | |
2006 | if (!*lose) { | |
2007 | parse_warn ("expecting right-hand side."); | |
2008 | *lose = 1; | |
2009 | skip_to_semi (cfile); | |
2010 | } | |
2011 | expression_dereference (&lhs, "parse_expression"); | |
2012 | } | |
2013 | return 0; | |
2014 | } | |
2015 | ||
2016 | /* At this point, rhs contains either an entire subexpression, | |
2017 | or at least a left-hand-side. If we do not see a binary token | |
2018 | as the next token, we're done with the expression. */ | |
2019 | ||
2020 | token = peek_token (&val, cfile); | |
2021 | switch (token) { | |
2022 | case EQUAL: | |
2023 | next_op = expr_equal; | |
2024 | break; | |
2025 | ||
2026 | case AND: | |
2027 | next_op = expr_and; | |
2028 | break; | |
2029 | ||
2030 | case OR: | |
2031 | next_op = expr_or; | |
2032 | break; | |
2033 | ||
2034 | default: | |
2035 | next_op = expr_none; | |
2036 | } | |
2037 | ||
2038 | /* If we have no lhs yet, we just parsed it. */ | |
2039 | if (!lhs) { | |
2040 | /* If there was no operator following what we just parsed, | |
2041 | then we're done - return it. */ | |
2042 | if (next_op == expr_none) { | |
2043 | *expr = rhs; | |
2044 | return 1; | |
2045 | } | |
2046 | lhs = rhs; | |
2047 | rhs = (struct expression *)0; | |
2048 | binop = next_op; | |
2049 | next_token (&val, cfile); /* Consume the operator. */ | |
2050 | goto new_rhs; | |
2051 | } | |
2052 | ||
2053 | /* Now, if we didn't find a binary operator, we're done parsing | |
2054 | this subexpression, so combine it with the preceding binary | |
2055 | operator and return the result. */ | |
2056 | if (next_op == expr_none) { | |
2057 | if (!expression_allocate (expr, | |
2058 | "parse_expression: COMBINE")) | |
8ae2d595 | 2059 | log_fatal ("Can't allocate expression!"); |
02a015fb TL |
2060 | |
2061 | (*expr) -> op = binop; | |
2062 | /* All the binary operators' data union members | |
2063 | are the same, so we'll cheat and use the member | |
2064 | for the equals operator. */ | |
2065 | (*expr) -> data.equal [0] = lhs; | |
2066 | (*expr) -> data.equal [1] = rhs; | |
2067 | return 1; | |
2068 | } | |
2069 | ||
2070 | /* Eat the operator token - we now know it was a binary operator... */ | |
2071 | token = next_token (&val, cfile); | |
2072 | ||
2073 | /* If the binary operator we saw previously has a lower precedence | |
2074 | than the next operator, then the rhs we just parsed for that | |
2075 | operator is actually the lhs of the operator with the higher | |
2076 | precedence - to get the real rhs, we need to recurse on the | |
2077 | new operator. */ | |
2078 | if (binop != expr_none && | |
2079 | op_precedence (binop, next_op) < 0) { | |
2080 | tmp = rhs; | |
2081 | rhs = (struct expression *)0; | |
2082 | if (!parse_expression (&rhs, cfile, lose, op_context (next_op), | |
2083 | &tmp, next_op)) { | |
2084 | if (!*lose) { | |
2085 | parse_warn ("expecting a subexpression"); | |
2086 | *lose = 1; | |
2087 | } | |
2088 | return 0; | |
2089 | } | |
2090 | next_op = expr_none; | |
2091 | } | |
2092 | ||
2093 | /* Now combine the LHS and the RHS using binop. */ | |
2094 | tmp = (struct expression *)0; | |
2095 | if (!expression_allocate (&tmp, "parse_expression: COMBINE2")) | |
8ae2d595 | 2096 | log_fatal ("No memory for equal precedence combination."); |
02a015fb TL |
2097 | |
2098 | /* Store the LHS and RHS. */ | |
2099 | tmp -> data.equal [0] = lhs; | |
2100 | tmp -> data.equal [1] = rhs; | |
2101 | tmp -> op = binop; | |
2102 | ||
2103 | lhs = tmp; | |
2104 | tmp = (struct expression *)0; | |
2105 | rhs = (struct expression *)0; | |
2106 | ||
2107 | /* Recursions don't return until we have parsed the end of the | |
2108 | expression, so if we recursed earlier, we can now return what | |
2109 | we got. */ | |
2110 | if (next_op == expr_none) { | |
2111 | *expr = lhs; | |
2112 | return 1; | |
2113 | } | |
2114 | ||
2115 | binop = next_op; | |
2116 | goto new_rhs; | |
2117 | } | |
2118 | ||
be6be08d TL |
2119 | /* option-statement :== identifier DOT identifier <syntax> SEMI |
2120 | | identifier <syntax> SEMI | |
2121 | ||
2122 | Option syntax is handled specially through format strings, so it | |
2123 | would be painful to come up with BNF for it. However, it always | |
2124 | starts as above and ends in a SEMI. */ | |
2125 | ||
2126 | struct executable_statement *parse_option_statement (cfile, lookups, | |
2127 | option, op) | |
2128 | FILE *cfile; | |
2129 | int lookups; | |
2130 | struct option *option; | |
2131 | enum statement_op op; | |
2132 | { | |
2133 | char *val; | |
02a015fb | 2134 | enum dhcp_token token; |
be6be08d TL |
2135 | char *fmt; |
2136 | struct expression *expr = (struct expression *)0; | |
02a015fb | 2137 | struct expression *tmp; |
be6be08d TL |
2138 | int lose; |
2139 | struct executable_statement *stmt; | |
02a015fb | 2140 | int ftt = 1; |
be6be08d TL |
2141 | |
2142 | token = peek_token (&val, cfile); | |
2143 | if (token == SEMI) { | |
2144 | /* Eat the semicolon... */ | |
2145 | token = next_token (&val, cfile); | |
be6be08d TL |
2146 | goto done; |
2147 | } | |
2148 | ||
a82abfc7 TL |
2149 | if (token == EQUAL) { |
2150 | /* Eat the equals sign. */ | |
2151 | token = next_token (&val, cfile); | |
2152 | ||
2153 | /* Parse a data expression and use its value for the data. */ | |
2154 | if (!parse_data_expression (&expr, cfile, &lose)) { | |
2155 | /* In this context, we must have an executable | |
2156 | statement, so if we found something else, it's | |
2157 | still an error. */ | |
2158 | if (!lose) { | |
2159 | parse_warn ("expecting a data expression."); | |
2160 | skip_to_semi (cfile); | |
2161 | } | |
2162 | return (struct executable_statement *)0; | |
2163 | } | |
2164 | ||
2165 | /* We got a valid expression, so use it. */ | |
2166 | goto done; | |
2167 | } | |
2168 | ||
be6be08d TL |
2169 | /* Parse the option data... */ |
2170 | do { | |
2171 | /* Set a flag if this is an array of a simple type (i.e., | |
2172 | not an array of pairs of IP addresses, or something | |
2173 | like that. */ | |
2174 | int uniform = option -> format [1] == 'A'; | |
2175 | ||
2176 | for (fmt = option -> format; *fmt; fmt++) { | |
2177 | if (*fmt == 'A') | |
2178 | break; | |
02a015fb | 2179 | tmp = expr; |
44aa67f6 | 2180 | expr = (struct expression *)0; |
02a015fb TL |
2181 | if (!parse_option_token (&expr, cfile, fmt, |
2182 | tmp, uniform, lookups)) { | |
2183 | expression_dereference | |
2184 | (&tmp, "parse_option_statement"); | |
2185 | return (struct executable_statement *)0; | |
2186 | } | |
2187 | if (tmp) | |
2188 | expression_dereference | |
2189 | (&tmp, "parse_option_statement"); | |
be6be08d TL |
2190 | } |
2191 | if (*fmt == 'A') { | |
2192 | token = peek_token (&val, cfile); | |
2193 | if (token == COMMA) { | |
2194 | token = next_token (&val, cfile); | |
2195 | continue; | |
2196 | } | |
2197 | break; | |
2198 | } | |
2199 | } while (*fmt == 'A'); | |
2200 | ||
2201 | done: | |
25541f2f | 2202 | if (!parse_semi (cfile)) |
be6be08d | 2203 | return (struct executable_statement *)0; |
be6be08d TL |
2204 | stmt = ((struct executable_statement *) |
2205 | dmalloc (sizeof *stmt, "parse_option_statement")); | |
02a015fb | 2206 | memset (stmt, 0, sizeof *stmt); |
be6be08d | 2207 | stmt -> op = op; |
02a015fb TL |
2208 | if (expr && !option_cache (&stmt -> data.option, |
2209 | (struct data_string *)0, expr, option)) | |
52c9d530 | 2210 | log_fatal ("no memory for option cache"); |
be6be08d TL |
2211 | return stmt; |
2212 | } | |
2213 | ||
02a015fb TL |
2214 | int parse_option_token (rv, cfile, fmt, expr, uniform, lookups) |
2215 | struct expression **rv; | |
be6be08d TL |
2216 | FILE *cfile; |
2217 | char *fmt; | |
2218 | struct expression *expr; | |
2219 | int uniform; | |
2220 | int lookups; | |
2221 | { | |
2222 | char *val; | |
02a015fb TL |
2223 | enum dhcp_token token; |
2224 | struct expression *t = (struct expression *)0; | |
be6be08d TL |
2225 | unsigned char buf [4]; |
2226 | int len; | |
2227 | unsigned char *ob; | |
2228 | struct iaddr addr; | |
2229 | ||
2230 | switch (*fmt) { | |
52c9d530 TL |
2231 | case 'U': |
2232 | token = next_token (&val, cfile); | |
2233 | if (!is_identifier (token)) { | |
2234 | parse_warn ("expecting identifier."); | |
2235 | skip_to_semi (cfile); | |
2236 | return 0; | |
2237 | } | |
2238 | if (!make_const_data (&t, (unsigned char *)val, | |
2239 | strlen (val), 1, 1)) | |
2240 | log_fatal ("No memory for %s", val); | |
2241 | break; | |
2242 | ||
be6be08d TL |
2243 | case 'X': |
2244 | token = peek_token (&val, cfile); | |
2245 | if (token == NUMBER_OR_NAME || token == NUMBER) { | |
02a015fb TL |
2246 | if (!expression_allocate (&t, "parse_option_token")) |
2247 | return 0; | |
2248 | if (!parse_cshl (&t -> data.const_data, cfile)) | |
2249 | return 0; | |
efc79acb | 2250 | t -> op = expr_const_data; |
be6be08d TL |
2251 | } else if (token == STRING) { |
2252 | token = next_token (&val, cfile); | |
52c9d530 | 2253 | if (!make_const_data (&t, (unsigned char *)val, |
02a015fb | 2254 | strlen (val), 1, 1)) |
52c9d530 | 2255 | log_fatal ("No memory for \"%s\"", val); |
be6be08d TL |
2256 | } else { |
2257 | parse_warn ("expecting string %s.", | |
2258 | "or hexadecimal data"); | |
2259 | skip_to_semi (cfile); | |
02a015fb | 2260 | return 0; |
be6be08d TL |
2261 | } |
2262 | break; | |
2263 | ||
2264 | case 't': /* Text string... */ | |
2265 | token = next_token (&val, cfile); | |
2266 | if (token != STRING && !is_identifier (token)) { | |
2267 | parse_warn ("expecting string."); | |
2268 | if (token != SEMI) | |
2269 | skip_to_semi (cfile); | |
02a015fb | 2270 | return 0; |
be6be08d | 2271 | } |
02a015fb TL |
2272 | if (!make_const_data (&t, (unsigned char *)val, |
2273 | strlen (val), 1, 1)) | |
8ae2d595 | 2274 | log_fatal ("No memory for concatenation"); |
be6be08d TL |
2275 | break; |
2276 | ||
2277 | case 'I': /* IP address or hostname. */ | |
02a015fb TL |
2278 | if (lookups) { |
2279 | if (!parse_ip_addr_or_hostname (&t, cfile, uniform)) | |
2280 | return 0; | |
2281 | } else { | |
be6be08d | 2282 | if (!parse_ip_addr (cfile, &addr)) |
02a015fb TL |
2283 | return 0; |
2284 | if (!make_const_data (&t, addr.iabuf, addr.len, 0, 1)) | |
2285 | return 0; | |
be6be08d | 2286 | } |
be6be08d TL |
2287 | break; |
2288 | ||
2289 | case 'L': /* Unsigned 32-bit integer... */ | |
2290 | case 'l': /* Signed 32-bit integer... */ | |
2291 | token = next_token (&val, cfile); | |
2292 | if (token != NUMBER) { | |
2293 | need_number: | |
2294 | parse_warn ("expecting number."); | |
2295 | if (token != SEMI) | |
2296 | skip_to_semi (cfile); | |
02a015fb | 2297 | return 0; |
be6be08d TL |
2298 | } |
2299 | convert_num (buf, val, 0, 32); | |
02a015fb TL |
2300 | if (!make_const_data (&t, buf, 4, 0, 1)) |
2301 | return 0; | |
be6be08d | 2302 | break; |
02a015fb | 2303 | |
be6be08d TL |
2304 | case 's': /* Signed 16-bit integer. */ |
2305 | case 'S': /* Unsigned 16-bit integer. */ | |
2306 | token = next_token (&val, cfile); | |
2307 | if (token != NUMBER) | |
2308 | goto need_number; | |
2309 | convert_num (buf, val, 0, 16); | |
02a015fb TL |
2310 | if (!make_const_data (&t, buf, 2, 0, 1)) |
2311 | return 0; | |
be6be08d | 2312 | break; |
02a015fb | 2313 | |
be6be08d TL |
2314 | case 'b': /* Signed 8-bit integer. */ |
2315 | case 'B': /* Unsigned 8-bit integer. */ | |
2316 | token = next_token (&val, cfile); | |
2317 | if (token != NUMBER) | |
2318 | goto need_number; | |
2319 | convert_num (buf, val, 0, 8); | |
02a015fb TL |
2320 | if (!make_const_data (&t, buf, 1, 0, 1)) |
2321 | return 0; | |
be6be08d | 2322 | break; |
02a015fb | 2323 | |
be6be08d TL |
2324 | case 'f': /* Boolean flag. */ |
2325 | token = next_token (&val, cfile); | |
2326 | if (!is_identifier (token)) { | |
2327 | parse_warn ("expecting identifier."); | |
2328 | bad_flag: | |
2329 | if (token != SEMI) | |
2330 | skip_to_semi (cfile); | |
02a015fb | 2331 | return 0; |
be6be08d TL |
2332 | } |
2333 | if (!strcasecmp (val, "true") | |
2334 | || !strcasecmp (val, "on")) | |
2335 | buf [0] = 1; | |
2336 | else if (!strcasecmp (val, "false") | |
2337 | || !strcasecmp (val, "off")) | |
2338 | buf [0] = 0; | |
2339 | else { | |
2340 | parse_warn ("expecting boolean."); | |
2341 | goto bad_flag; | |
2342 | } | |
02a015fb TL |
2343 | if (!make_const_data (&t, buf, 1, 0, 1)) |
2344 | return 0; | |
be6be08d | 2345 | break; |
02a015fb | 2346 | |
be6be08d | 2347 | default: |
8ae2d595 | 2348 | log_error ("Bad format %c in parse_option_param.", |
be6be08d TL |
2349 | *fmt); |
2350 | skip_to_semi (cfile); | |
02a015fb | 2351 | return 0; |
be6be08d | 2352 | } |
02a015fb TL |
2353 | if (expr) { |
2354 | if (!make_concat (rv, expr, t)) | |
2355 | return 0; | |
2356 | expression_dereference (&t, "parse_option_token"); | |
2357 | } else | |
2358 | *rv = t; | |
2359 | return 1; | |
be6be08d | 2360 | } |
74f45f96 | 2361 | |
b1013db7 TL |
2362 | /* allow-deny-keyword :== BOOTP |
2363 | | BOOTING | |
2364 | | DYNAMIC_BOOTP | |
2365 | | UNKNOWN_CLIENTS */ | |
2366 | ||
2367 | int parse_allow_deny (oc, cfile, flag) | |
2368 | struct option_cache **oc; | |
2369 | FILE *cfile; | |
2370 | int flag; | |
2371 | { | |
2372 | enum dhcp_token token; | |
2373 | char *val; | |
2374 | unsigned char rf = flag; | |
2375 | struct expression *data = (struct expression *)0; | |
2376 | int status; | |
2377 | ||
2378 | if (!make_const_data (&data, &rf, 1, 0, 1)) | |
2379 | return 0; | |
2380 | ||
2381 | token = next_token (&val, cfile); | |
2382 | switch (token) { | |
2383 | case BOOTP: | |
2384 | status = option_cache (oc, (struct data_string *)0, data, | |
2385 | &server_options [SV_ALLOW_BOOTP]); | |
2386 | break; | |
2387 | ||
2388 | case BOOTING: | |
2389 | status = option_cache (oc, (struct data_string *)0, data, | |
2390 | &server_options [SV_ALLOW_BOOTING]); | |
2391 | break; | |
2392 | ||
2393 | case DYNAMIC_BOOTP: | |
2394 | status = option_cache (oc, (struct data_string *)0, data, | |
2395 | &server_options [SV_DYNAMIC_BOOTP]); | |
2396 | break; | |
2397 | ||
2398 | case UNKNOWN_CLIENTS: | |
2399 | status = (option_cache | |
2400 | (oc, (struct data_string *)0, data, | |
2401 | &server_options [SV_BOOT_UNKNOWN_CLIENTS])); | |
2402 | break; | |
2403 | ||
2404 | default: | |
2405 | parse_warn ("expecting allow/deny key"); | |
2406 | skip_to_semi (cfile); | |
2407 | return 0; | |
2408 | } | |
2409 | parse_semi (cfile); | |
2410 | return status; | |
2411 | } | |
2412 | ||
74f45f96 TL |
2413 | int parse_auth_key (key_id, cfile) |
2414 | struct data_string *key_id; | |
2415 | FILE *cfile; | |
2416 | { | |
2417 | struct data_string key_data; | |
2418 | char *val; | |
2419 | enum dhcp_token token; | |
2420 | struct auth_key *key, *old_key = (struct auth_key *)0; | |
2421 | ||
2422 | memset (&key_data, 0, sizeof key_data); | |
2423 | ||
2424 | if (!parse_cshl (key_id, cfile)) | |
2425 | return 0; | |
2426 | ||
2427 | key = auth_key_lookup (key_id); | |
2428 | ||
2429 | token = peek_token (&val, cfile); | |
2430 | if (token == SEMI) { | |
2431 | if (!key) | |
2432 | parse_warn ("reference to undefined key %s", | |
2433 | print_hex_1 (key_id -> len, | |
2434 | key_id -> data, | |
2435 | key_id -> len)); | |
2436 | data_string_forget (key_id, "parse_auth_key"); | |
2437 | } else { | |
2438 | if (!parse_cshl (&key_data, cfile)) | |
2439 | return 0; | |
2440 | if (key) { | |
2441 | parse_warn ("redefinition of key %s", | |
2442 | print_hex_1 (key_id -> len, | |
2443 | key_id -> data, | |
2444 | key_id -> len)); | |
2445 | old_key = key; | |
2446 | } | |
2447 | key = new_auth_key (key_data.len, "parse_auth_key"); | |
2448 | if (!key) | |
2449 | log_fatal ("No memory for key %s", | |
2450 | print_hex_1 (key_id -> len, | |
2451 | key_id -> data, | |
2452 | key_id -> len)); | |
2453 | key -> length = key_data.len; | |
2454 | memcpy (key -> data, key_data.data, key_data.len); | |
2455 | enter_auth_key (key_id, key); | |
2456 | data_string_forget (&key_data, "parse_auth_key"); | |
2457 | } | |
2458 | ||
2459 | parse_semi (cfile); | |
2460 | return key_id -> len ? 1 : 0; | |
2461 | } |