forked from freebsd/freebsd-src
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathreadfile.c
2084 lines (1825 loc) · 46.5 KB
/
readfile.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/************************************************************************
Copyright 1988, 1991 by Carnegie Mellon University
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, provided
that the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation, and that the name of Carnegie Mellon University not be used
in advertising or publicity pertaining to distribution of the software
without specific, written prior permission.
CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
IN NO EVENT SHALL CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
$FreeBSD$
************************************************************************/
/*
* bootpd configuration file reading code.
*
* The routines in this file deal with reading, interpreting, and storing
* the information found in the bootpd configuration file (usually
* /etc/bootptab).
*/
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <syslog.h>
#ifndef USE_BFUNCS
#include <memory.h>
/* Yes, memcpy is OK here (no overlapped copies). */
#define bcopy(a,b,c) memcpy(b,a,c)
#define bzero(p,l) memset(p,0,l)
#define bcmp(a,b,c) memcmp(a,b,c)
#endif
#include "bootp.h"
#include "hash.h"
#include "hwaddr.h"
#include "lookup.h"
#include "readfile.h"
#include "report.h"
#include "tzone.h"
#include "bootpd.h"
#define HASHTABLESIZE 257 /* Hash table size (prime) */
/* Non-standard hardware address type (see bootp.h) */
#define HTYPE_DIRECT 0
/* Error codes returned by eval_symbol: */
#define SUCCESS 0
#define E_END_OF_ENTRY (-1)
#define E_SYNTAX_ERROR (-2)
#define E_UNKNOWN_SYMBOL (-3)
#define E_BAD_IPADDR (-4)
#define E_BAD_HWADDR (-5)
#define E_BAD_LONGWORD (-6)
#define E_BAD_HWATYPE (-7)
#define E_BAD_PATHNAME (-8)
#define E_BAD_VALUE (-9)
/* Tag idendities. */
#define SYM_NULL 0
#define SYM_BOOTFILE 1
#define SYM_COOKIE_SERVER 2
#define SYM_DOMAIN_SERVER 3
#define SYM_GATEWAY 4
#define SYM_HWADDR 5
#define SYM_HOMEDIR 6
#define SYM_HTYPE 7
#define SYM_IMPRESS_SERVER 8
#define SYM_IPADDR 9
#define SYM_LOG_SERVER 10
#define SYM_LPR_SERVER 11
#define SYM_NAME_SERVER 12
#define SYM_RLP_SERVER 13
#define SYM_SUBNET_MASK 14
#define SYM_TIME_OFFSET 15
#define SYM_TIME_SERVER 16
#define SYM_VENDOR_MAGIC 17
#define SYM_SIMILAR_ENTRY 18
#define SYM_NAME_SWITCH 19
#define SYM_BOOTSIZE 20
#define SYM_BOOT_SERVER 22
#define SYM_TFTPDIR 23
#define SYM_DUMP_FILE 24
#define SYM_DOMAIN_NAME 25
#define SYM_SWAP_SERVER 26
#define SYM_ROOT_PATH 27
#define SYM_EXTEN_FILE 28
#define SYM_REPLY_ADDR 29
#define SYM_NIS_DOMAIN 30 /* RFC 1533 */
#define SYM_NIS_SERVER 31 /* RFC 1533 */
#define SYM_NTP_SERVER 32 /* RFC 1533 */
#define SYM_EXEC_FILE 33 /* YORK_EX_OPTION */
#define SYM_MSG_SIZE 34
#define SYM_MIN_WAIT 35
/* XXX - Add new tags here */
#define OP_ADDITION 1 /* Operations on tags */
#define OP_DELETION 2
#define OP_BOOLEAN 3
#define MAXINADDRS 16 /* Max size of an IP address list */
#define MAXBUFLEN 256 /* Max temp buffer space */
#define MAXENTRYLEN 2048 /* Max size of an entire entry */
/*
* Structure used to map a configuration-file symbol (such as "ds") to a
* unique integer.
*/
struct symbolmap {
char *symbol;
int symbolcode;
};
struct htypename {
char *name;
byte htype;
};
PRIVATE int nhosts; /* Number of hosts (/w hw or IP address) */
PRIVATE int nentries; /* Total number of entries */
PRIVATE int32 modtime = 0; /* Last modification time of bootptab */
PRIVATE char *current_hostname; /* Name of the current entry. */
PRIVATE char current_tagname[8];
/*
* List of symbolic names used in the bootptab file. The order and actual
* values of the symbol codes (SYM_. . .) are unimportant, but they must
* all be unique.
*/
PRIVATE struct symbolmap symbol_list[] = {
{"bf", SYM_BOOTFILE},
{"bs", SYM_BOOTSIZE},
{"cs", SYM_COOKIE_SERVER},
{"df", SYM_DUMP_FILE},
{"dn", SYM_DOMAIN_NAME},
{"ds", SYM_DOMAIN_SERVER},
{"ef", SYM_EXTEN_FILE},
{"ex", SYM_EXEC_FILE}, /* YORK_EX_OPTION */
{"gw", SYM_GATEWAY},
{"ha", SYM_HWADDR},
{"hd", SYM_HOMEDIR},
{"hn", SYM_NAME_SWITCH},
{"ht", SYM_HTYPE},
{"im", SYM_IMPRESS_SERVER},
{"ip", SYM_IPADDR},
{"lg", SYM_LOG_SERVER},
{"lp", SYM_LPR_SERVER},
{"ms", SYM_MSG_SIZE},
{"mw", SYM_MIN_WAIT},
{"ns", SYM_NAME_SERVER},
{"nt", SYM_NTP_SERVER},
{"ra", SYM_REPLY_ADDR},
{"rl", SYM_RLP_SERVER},
{"rp", SYM_ROOT_PATH},
{"sa", SYM_BOOT_SERVER},
{"sm", SYM_SUBNET_MASK},
{"sw", SYM_SWAP_SERVER},
{"tc", SYM_SIMILAR_ENTRY},
{"td", SYM_TFTPDIR},
{"to", SYM_TIME_OFFSET},
{"ts", SYM_TIME_SERVER},
{"vm", SYM_VENDOR_MAGIC},
{"yd", SYM_NIS_DOMAIN},
{"ys", SYM_NIS_SERVER},
/* XXX - Add new tags here */
};
/*
* List of symbolic names for hardware types. Name translates into
* hardware type code listed with it. Names must begin with a letter
* and must be all lowercase. This is searched linearly, so put
* commonly-used entries near the beginning.
*/
PRIVATE struct htypename htnamemap[] = {
{"ethernet", HTYPE_ETHERNET},
{"ethernet3", HTYPE_EXP_ETHERNET},
{"ether", HTYPE_ETHERNET},
{"ether3", HTYPE_EXP_ETHERNET},
{"ieee802", HTYPE_IEEE802},
{"tr", HTYPE_IEEE802},
{"token-ring", HTYPE_IEEE802},
{"pronet", HTYPE_PRONET},
{"chaos", HTYPE_CHAOS},
{"arcnet", HTYPE_ARCNET},
{"ax.25", HTYPE_AX25},
{"direct", HTYPE_DIRECT},
{"serial", HTYPE_DIRECT},
{"slip", HTYPE_DIRECT},
{"ppp", HTYPE_DIRECT}
};
/*
* Externals and forward declarations.
*/
extern boolean iplookcmp();
boolean nmcmp(hash_datum *, hash_datum *);
PRIVATE void
adjust(char **);
PRIVATE void
del_string(struct shared_string *);
PRIVATE void
del_bindata(struct shared_bindata *);
PRIVATE void
del_iplist(struct in_addr_list *);
PRIVATE void
eat_whitespace(char **);
PRIVATE int
eval_symbol(char **, struct host *);
PRIVATE void
fill_defaults(struct host *, char **);
PRIVATE void
free_host(hash_datum *);
PRIVATE struct in_addr_list *
get_addresses(char **);
PRIVATE struct shared_string *
get_shared_string(char **);
PRIVATE char *
get_string(char **, char *, u_int *);
PRIVATE u_int32
get_u_long(char **);
PRIVATE boolean
goodname(char *);
PRIVATE boolean
hwinscmp(hash_datum *, hash_datum *);
PRIVATE int
interp_byte(char **, byte *);
PRIVATE void
makelower(char *);
PRIVATE boolean
nullcmp(hash_datum *, hash_datum *);
PRIVATE int
process_entry(struct host *, char *);
PRIVATE int
process_generic(char **, struct shared_bindata **, u_int);
PRIVATE byte *
prs_haddr(char **, u_int);
PRIVATE int
prs_inetaddr(char **, u_int32 *);
PRIVATE void
read_entry(FILE *, char *, u_int *);
PRIVATE char *
smalloc(u_int);
/*
* Vendor magic cookies for CMU and RFC1048
*/
u_char vm_cmu[4] = VM_CMU;
u_char vm_rfc1048[4] = VM_RFC1048;
/*
* Main hash tables
*/
hash_tbl *hwhashtable;
hash_tbl *iphashtable;
hash_tbl *nmhashtable;
/*
* Allocate hash tables for hardware address, ip address, and hostname
* (shared by bootpd and bootpef)
*/
void
rdtab_init()
{
hwhashtable = hash_Init(HASHTABLESIZE);
iphashtable = hash_Init(HASHTABLESIZE);
nmhashtable = hash_Init(HASHTABLESIZE);
if (!(hwhashtable && iphashtable && nmhashtable)) {
report(LOG_ERR, "Unable to allocate hash tables.");
exit(1);
}
}
/*
* Read bootptab database file. Avoid rereading the file if the
* write date hasn't changed since the last time we read it.
*/
void
readtab(force)
int force;
{
struct host *hp;
FILE *fp;
struct stat st;
unsigned hashcode, buflen;
static char buffer[MAXENTRYLEN];
/*
* Check the last modification time.
*/
if (stat(bootptab, &st) < 0) {
report(LOG_ERR, "stat on \"%s\": %s",
bootptab, get_errmsg());
return;
}
#ifdef DEBUG
if (debug > 3) {
char timestr[28];
strcpy(timestr, ctime(&(st.st_mtime)));
/* zap the newline */
timestr[24] = '\0';
report(LOG_INFO, "bootptab mtime: %s",
timestr);
}
#endif
if ((force == 0) &&
(st.st_mtime == modtime) &&
st.st_nlink) {
/*
* hasn't been modified or deleted yet.
*/
return;
}
if (debug)
report(LOG_INFO, "reading %s\"%s\"",
(modtime != 0L) ? "new " : "",
bootptab);
/*
* Open bootptab file.
*/
if ((fp = fopen(bootptab, "r")) == NULL) {
report(LOG_ERR, "error opening \"%s\": %s", bootptab, get_errmsg());
return;
}
/*
* Record file modification time.
*/
if (fstat(fileno(fp), &st) < 0) {
report(LOG_ERR, "fstat: %s", get_errmsg());
fclose(fp);
return;
}
modtime = st.st_mtime;
/*
* Entirely erase all hash tables.
*/
hash_Reset(hwhashtable, free_host);
hash_Reset(iphashtable, free_host);
hash_Reset(nmhashtable, free_host);
nhosts = 0;
nentries = 0;
while (TRUE) {
buflen = sizeof(buffer);
read_entry(fp, buffer, &buflen);
if (buflen == 0) { /* More entries? */
break;
}
hp = (struct host *) smalloc(sizeof(struct host));
bzero((char *) hp, sizeof(*hp));
/* the link count it zero */
/*
* Get individual info
*/
if (process_entry(hp, buffer) < 0) {
hp->linkcount = 1;
free_host((hash_datum *) hp);
continue;
}
/*
* If this is not a dummy entry, and the IP or HW
* address is not yet set, try to get them here.
* Dummy entries have . as first char of name.
*/
if (goodname(hp->hostname->string)) {
char *hn = hp->hostname->string;
u_int32 value;
if (hp->flags.iaddr == 0) {
if (lookup_ipa(hn, &value)) {
report(LOG_ERR, "can not get IP addr for %s", hn);
report(LOG_ERR, "(dummy names should start with '.')");
} else {
hp->iaddr.s_addr = value;
hp->flags.iaddr = TRUE;
}
}
/* Set default subnet mask. */
if (hp->flags.subnet_mask == 0) {
if (lookup_netmask(hp->iaddr.s_addr, &value)) {
report(LOG_ERR, "can not get netmask for %s", hn);
} else {
hp->subnet_mask.s_addr = value;
hp->flags.subnet_mask = TRUE;
}
}
}
if (hp->flags.iaddr) {
nhosts++;
}
/* Register by HW addr if known. */
if (hp->flags.htype && hp->flags.haddr) {
/* We will either insert it or free it. */
hp->linkcount++;
hashcode = hash_HashFunction(hp->haddr, haddrlength(hp->htype));
if (hash_Insert(hwhashtable, hashcode, hwinscmp, hp, hp) < 0) {
report(LOG_NOTICE, "duplicate %s address: %s",
netname(hp->htype),
haddrtoa(hp->haddr, haddrlength(hp->htype)));
free_host((hash_datum *) hp);
continue;
}
}
/* Register by IP addr if known. */
if (hp->flags.iaddr) {
hashcode = hash_HashFunction((u_char *) & (hp->iaddr.s_addr), 4);
if (hash_Insert(iphashtable, hashcode, nullcmp, hp, hp) < 0) {
report(LOG_ERR,
"hash_Insert() failed on IP address insertion");
} else {
/* Just inserted the host struct in a new hash list. */
hp->linkcount++;
}
}
/* Register by Name (always known) */
hashcode = hash_HashFunction((u_char *) hp->hostname->string,
strlen(hp->hostname->string));
if (hash_Insert(nmhashtable, hashcode, nullcmp,
hp->hostname->string, hp) < 0) {
report(LOG_ERR,
"hash_Insert() failed on insertion of hostname: \"%s\"",
hp->hostname->string);
} else {
/* Just inserted the host struct in a new hash list. */
hp->linkcount++;
}
nentries++;
}
fclose(fp);
if (debug)
report(LOG_INFO, "read %d entries (%d hosts) from \"%s\"",
nentries, nhosts, bootptab);
return;
}
/*
* Read an entire host entry from the file pointed to by "fp" and insert it
* into the memory pointed to by "buffer". Leading whitespace and comments
* starting with "#" are ignored (removed). Backslashes (\) always quote
* the next character except that newlines preceded by a backslash cause
* line-continuation onto the next line. The entry is terminated by a
* newline character which is not preceded by a backslash. Sequences
* surrounded by double quotes are taken literally (including newlines, but
* not backslashes).
*
* The "bufsiz" parameter points to an unsigned int which specifies the
* maximum permitted buffer size. Upon return, this value will be replaced
* with the actual length of the entry (not including the null terminator).
*
* This code is a little scary. . . . I don't like using gotos in C
* either, but I first wrote this as an FSM diagram and gotos seemed like
* the easiest way to implement it. Maybe later I'll clean it up.
*/
PRIVATE void
read_entry(fp, buffer, bufsiz)
FILE *fp;
char *buffer;
unsigned *bufsiz;
{
int c, length;
length = 0;
/*
* Eat whitespace, blank lines, and comment lines.
*/
top:
c = fgetc(fp);
if (c < 0) {
goto done; /* Exit if end-of-file */
}
if (isspace(c)) {
goto top; /* Skip over whitespace */
}
if (c == '#') {
while (TRUE) { /* Eat comments after # */
c = fgetc(fp);
if (c < 0) {
goto done; /* Exit if end-of-file */
}
if (c == '\n') {
goto top; /* Try to read the next line */
}
}
}
ungetc(c, fp); /* Other character, push it back to reprocess it */
/*
* Now we're actually reading a data entry. Get each character and
* assemble it into the data buffer, processing special characters like
* double quotes (") and backslashes (\).
*/
mainloop:
c = fgetc(fp);
switch (c) {
case EOF:
case '\n':
goto done; /* Exit on EOF or newline */
case '\\':
c = fgetc(fp); /* Backslash, read a new character */
if (c < 0) {
goto done; /* Exit on EOF */
}
*buffer++ = c; /* Store the literal character */
length++;
if (length < *bufsiz - 1) {
goto mainloop;
} else {
goto done;
}
case '"':
*buffer++ = '"'; /* Store double-quote */
length++;
if (length >= *bufsiz - 1) {
goto done;
}
while (TRUE) { /* Special quote processing loop */
c = fgetc(fp);
switch (c) {
case EOF:
goto done; /* Exit on EOF . . . */
case '"':
*buffer++ = '"';/* Store matching quote */
length++;
if (length < *bufsiz - 1) {
goto mainloop; /* And continue main loop */
} else {
goto done;
}
case '\\':
if ((c = fgetc(fp)) < 0) { /* Backslash */
goto done; /* EOF. . . .*/
}
/* FALLTHROUGH */
default:
*buffer++ = c; /* Other character, store it */
length++;
if (length >= *bufsiz - 1) {
goto done;
}
}
}
case ':':
*buffer++ = c; /* Store colons */
length++;
if (length >= *bufsiz - 1) {
goto done;
}
do { /* But remove whitespace after them */
c = fgetc(fp);
if ((c < 0) || (c == '\n')) {
goto done;
}
} while (isspace(c)); /* Skip whitespace */
if (c == '\\') { /* Backslash quotes next character */
c = fgetc(fp);
if (c < 0) {
goto done;
}
if (c == '\n') {
goto top; /* Backslash-newline continuation */
}
}
/* FALLTHROUGH if "other" character */
default:
*buffer++ = c; /* Store other characters */
length++;
if (length >= *bufsiz - 1) {
goto done;
}
}
goto mainloop; /* Keep going */
done:
*buffer = '\0'; /* Terminate string */
*bufsiz = length; /* Tell the caller its length */
}
/*
* Parse out all the various tags and parameters in the host entry pointed
* to by "src". Stuff all the data into the appropriate fields of the
* host structure pointed to by "host". If there is any problem with the
* entry, an error message is reported via report(), no further processing
* is done, and -1 is returned. Successful calls return 0.
*
* (Some errors probably shouldn't be so completely fatal. . . .)
*/
PRIVATE int
process_entry(host, src)
struct host *host;
char *src;
{
int retval;
char *msg;
if (!host || *src == '\0') {
return -1;
}
host->hostname = get_shared_string(&src);
#if 0
/* Be more liberal for the benefit of dummy tag names. */
if (!goodname(host->hostname->string)) {
report(LOG_ERR, "bad hostname: \"%s\"", host->hostname->string);
del_string(host->hostname);
return -1;
}
#endif
current_hostname = host->hostname->string;
adjust(&src);
while (TRUE) {
retval = eval_symbol(&src, host);
if (retval == SUCCESS) {
adjust(&src);
continue;
}
if (retval == E_END_OF_ENTRY) {
/* The default subnet mask is set in readtab() */
return 0;
}
/* Some kind of error. */
switch (retval) {
case E_SYNTAX_ERROR:
msg = "bad syntax";
break;
case E_UNKNOWN_SYMBOL:
msg = "unknown symbol";
break;
case E_BAD_IPADDR:
msg = "bad INET address";
break;
case E_BAD_HWADDR:
msg = "bad hardware address";
break;
case E_BAD_LONGWORD:
msg = "bad longword value";
break;
case E_BAD_HWATYPE:
msg = "bad HW address type";
break;
case E_BAD_PATHNAME:
msg = "bad pathname (need leading '/')";
break;
case E_BAD_VALUE:
msg = "bad value";
break;
default:
msg = "unknown error";
break;
} /* switch */
report(LOG_ERR, "in entry named \"%s\", symbol \"%s\": %s",
current_hostname, current_tagname, msg);
return -1;
}
}
/*
* Macros for use in the function below:
*/
/* Parse one INET address stored directly in MEMBER. */
#define PARSE_IA1(MEMBER) do \
{ \
if (optype == OP_BOOLEAN) \
return E_SYNTAX_ERROR; \
hp->flags.MEMBER = FALSE; \
if (optype == OP_ADDITION) { \
if (prs_inetaddr(symbol, &value) < 0) \
return E_BAD_IPADDR; \
hp->MEMBER.s_addr = value; \
hp->flags.MEMBER = TRUE; \
} \
} while (0)
/* Parse a list of INET addresses pointed to by MEMBER */
#define PARSE_IAL(MEMBER) do \
{ \
if (optype == OP_BOOLEAN) \
return E_SYNTAX_ERROR; \
if (hp->flags.MEMBER) { \
hp->flags.MEMBER = FALSE; \
assert(hp->MEMBER); \
del_iplist(hp->MEMBER); \
hp->MEMBER = NULL; \
} \
if (optype == OP_ADDITION) { \
hp->MEMBER = get_addresses(symbol); \
if (hp->MEMBER == NULL) \
return E_SYNTAX_ERROR; \
hp->flags.MEMBER = TRUE; \
} \
} while (0)
/* Parse a shared string pointed to by MEMBER */
#define PARSE_STR(MEMBER) do \
{ \
if (optype == OP_BOOLEAN) \
return E_SYNTAX_ERROR; \
if (hp->flags.MEMBER) { \
hp->flags.MEMBER = FALSE; \
assert(hp->MEMBER); \
del_string(hp->MEMBER); \
hp->MEMBER = NULL; \
} \
if (optype == OP_ADDITION) { \
hp->MEMBER = get_shared_string(symbol); \
if (hp->MEMBER == NULL) \
return E_SYNTAX_ERROR; \
hp->flags.MEMBER = TRUE; \
} \
} while (0)
/* Parse an unsigned integer value for MEMBER */
#define PARSE_UINT(MEMBER) do \
{ \
if (optype == OP_BOOLEAN) \
return E_SYNTAX_ERROR; \
hp->flags.MEMBER = FALSE; \
if (optype == OP_ADDITION) { \
value = get_u_long(symbol); \
hp->MEMBER = value; \
hp->flags.MEMBER = TRUE; \
} \
} while (0)
/*
* Evaluate the two-character tag symbol pointed to by "symbol" and place
* the data in the structure pointed to by "hp". The pointer pointed to
* by "symbol" is updated to point past the source string (but may not
* point to the next tag entry).
*
* Obviously, this need a few more comments. . . .
*/
PRIVATE int
eval_symbol(symbol, hp)
char **symbol;
struct host *hp;
{
char tmpstr[MAXSTRINGLEN];
byte *tmphaddr;
struct symbolmap *symbolptr;
u_int32 value;
int32 timeoff;
int i, numsymbols;
unsigned len;
int optype; /* Indicates boolean, addition, or deletion */
eat_whitespace(symbol);
/* Make sure this is set before returning. */
current_tagname[0] = (*symbol)[0];
current_tagname[1] = (*symbol)[1];
current_tagname[2] = 0;
if ((*symbol)[0] == '\0') {
return E_END_OF_ENTRY;
}
if ((*symbol)[0] == ':') {
return SUCCESS;
}
if ((*symbol)[0] == 'T') { /* generic symbol */
(*symbol)++;
value = get_u_long(symbol);
snprintf(current_tagname, sizeof(current_tagname),
"T%d", (int)value);
eat_whitespace(symbol);
if ((*symbol)[0] != '=') {
return E_SYNTAX_ERROR;
}
(*symbol)++;
if (!(hp->generic)) {
hp->generic = (struct shared_bindata *)
smalloc(sizeof(struct shared_bindata));
}
if (process_generic(symbol, &(hp->generic), (byte) (value & 0xFF)))
return E_SYNTAX_ERROR;
hp->flags.generic = TRUE;
return SUCCESS;
}
/*
* Determine the type of operation to be done on this symbol
*/
switch ((*symbol)[2]) {
case '=':
optype = OP_ADDITION;
break;
case '@':
optype = OP_DELETION;
break;
case ':':
case '\0':
optype = OP_BOOLEAN;
break;
default:
return E_SYNTAX_ERROR;
}
symbolptr = symbol_list;
numsymbols = sizeof(symbol_list) / sizeof(struct symbolmap);
for (i = 0; i < numsymbols; i++) {
if (((symbolptr->symbol)[0] == (*symbol)[0]) &&
((symbolptr->symbol)[1] == (*symbol)[1])) {
break;
}
symbolptr++;
}
if (i >= numsymbols) {
return E_UNKNOWN_SYMBOL;
}
/*
* Skip past the = or @ character (to point to the data) if this
* isn't a boolean operation. For boolean operations, just skip
* over the two-character tag symbol (and nothing else. . . .).
*/
(*symbol) += (optype == OP_BOOLEAN) ? 2 : 3;
eat_whitespace(symbol);
/* The cases below are in order by symbolcode value. */
switch (symbolptr->symbolcode) {
case SYM_BOOTFILE:
PARSE_STR(bootfile);
break;
case SYM_COOKIE_SERVER:
PARSE_IAL(cookie_server);
break;
case SYM_DOMAIN_SERVER:
PARSE_IAL(domain_server);
break;
case SYM_GATEWAY:
PARSE_IAL(gateway);
break;
case SYM_HWADDR:
if (optype == OP_BOOLEAN)
return E_SYNTAX_ERROR;
hp->flags.haddr = FALSE;
if (optype == OP_ADDITION) {
/* Default the HW type to Ethernet */
if (hp->flags.htype == 0) {
hp->flags.htype = TRUE;
hp->htype = HTYPE_ETHERNET;
}
tmphaddr = prs_haddr(symbol, hp->htype);
if (!tmphaddr)
return E_BAD_HWADDR;
bcopy(tmphaddr, hp->haddr, haddrlength(hp->htype));
hp->flags.haddr = TRUE;
}
break;
case SYM_HOMEDIR:
PARSE_STR(homedir);
break;
case SYM_HTYPE:
if (optype == OP_BOOLEAN)
return E_SYNTAX_ERROR;
hp->flags.htype = FALSE;
if (optype == OP_ADDITION) {
value = 0L; /* Assume an illegal value */
eat_whitespace(symbol);
if (isdigit(**symbol)) {
value = get_u_long(symbol);
} else {
len = sizeof(tmpstr);
(void) get_string(symbol, tmpstr, &len);
makelower(tmpstr);
numsymbols = sizeof(htnamemap) /
sizeof(struct htypename);
for (i = 0; i < numsymbols; i++) {
if (!strcmp(htnamemap[i].name, tmpstr)) {
break;
}
}
if (i < numsymbols) {
value = htnamemap[i].htype;
}
}
if (value >= hwinfocnt) {
return E_BAD_HWATYPE;
}
hp->htype = (byte) (value & 0xFF);
hp->flags.htype = TRUE;
}
break;
case SYM_IMPRESS_SERVER:
PARSE_IAL(impress_server);
break;
case SYM_IPADDR:
PARSE_IA1(iaddr);
break;
case SYM_LOG_SERVER:
PARSE_IAL(log_server);
break;
case SYM_LPR_SERVER:
PARSE_IAL(lpr_server);
break;
case SYM_NAME_SERVER:
PARSE_IAL(name_server);
break;
case SYM_RLP_SERVER:
PARSE_IAL(rlp_server);
break;
case SYM_SUBNET_MASK:
PARSE_IA1(subnet_mask);
break;
case SYM_TIME_OFFSET:
if (optype == OP_BOOLEAN)
return E_SYNTAX_ERROR;
hp->flags.time_offset = FALSE;
if (optype == OP_ADDITION) {
len = sizeof(tmpstr);
(void) get_string(symbol, tmpstr, &len);
if (!strncmp(tmpstr, "auto", 4)) {
hp->time_offset = secondswest;
} else {
if (sscanf(tmpstr, "%d", (int*)&timeoff) != 1)
return E_BAD_LONGWORD;
hp->time_offset = timeoff;
}
hp->flags.time_offset = TRUE;
}
break;
case SYM_TIME_SERVER:
PARSE_IAL(time_server);
break;
case SYM_VENDOR_MAGIC:
if (optype == OP_BOOLEAN)
return E_SYNTAX_ERROR;
hp->flags.vm_cookie = FALSE;
if (optype == OP_ADDITION) {
if (strncmp(*symbol, "auto", 4)) {
/* The string is not "auto" */
if (!strncmp(*symbol, "rfc", 3)) {