1 |
#include "EXTERN.h" |
2 |
#include "perl.h" |
3 |
#include "XSUB.h" |
4 |
|
5 |
// C99 required |
6 |
|
7 |
//#define BENCHMARK |
8 |
|
9 |
#define ASN_BOOLEAN 0x01 |
10 |
#define ASN_INTEGER32 0x02 |
11 |
#define ASN_OCTET_STRING 0x04 |
12 |
#define ASN_NULL 0x05 |
13 |
#define ASN_OBJECT_IDENTIFIER 0x06 |
14 |
#define ASN_SEQUENCE 0x30 |
15 |
#define ASN_IPADDRESS 0x40 |
16 |
#define ASN_COUNTER32 0x41 |
17 |
#define ASN_UNSIGNED32 0x42 |
18 |
#define ASN_TIMETICKS 0x43 |
19 |
#define ASN_OPAQUE 0x44 |
20 |
#define ASN_COUNTER64 0x46 |
21 |
|
22 |
#define MAX_OID_STRLEN 4096 |
23 |
|
24 |
#define HAVE_VERSIONSORT defined (_GNU_SOURCE) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1 |
25 |
|
26 |
static SV *msg; |
27 |
static int errflag, leading_dot; |
28 |
static U8 *buf, *cur; |
29 |
static STRLEN len, rem; |
30 |
|
31 |
static SV * |
32 |
x_get_cv (SV *cb_sv) |
33 |
{ |
34 |
HV *st; |
35 |
GV *gvp; |
36 |
CV *cv = sv_2cv (cb_sv, &st, &gvp, 0); |
37 |
|
38 |
if (!cv) |
39 |
croak ("CODE reference expected"); |
40 |
|
41 |
return (SV *)cv; |
42 |
} |
43 |
|
44 |
static void |
45 |
error (const char *errmsg) |
46 |
{ |
47 |
errflag = 1; |
48 |
|
49 |
if (!msg) |
50 |
croak ("Net::SNMP::XS fatal error, parser called without parsing context"); |
51 |
|
52 |
dSP; |
53 |
PUSHMARK (SP); |
54 |
EXTEND (SP, 2); |
55 |
PUSHs (msg); |
56 |
PUSHs (sv_2mortal (newSVpv (errmsg, 0))); |
57 |
PUTBACK; |
58 |
call_method ("_error", G_VOID | G_DISCARD); |
59 |
} |
60 |
|
61 |
static int |
62 |
need (int count) |
63 |
{ |
64 |
if (count < 0 || (int)rem < count) |
65 |
{ |
66 |
error ("Unexpected end of message buffer"); |
67 |
return 0; |
68 |
} |
69 |
|
70 |
return 1; |
71 |
} |
72 |
|
73 |
static U8 * |
74 |
getn (int count, const U8 *errres) |
75 |
{ |
76 |
if (!need (count)) |
77 |
return (U8 *)errres; |
78 |
|
79 |
U8 *res = cur; |
80 |
|
81 |
cur += count; |
82 |
rem -= count; |
83 |
|
84 |
return res; |
85 |
} |
86 |
|
87 |
static U8 |
88 |
get8 (void) |
89 |
{ |
90 |
if (rem <= 0) |
91 |
{ |
92 |
error ("Unexpected end of message buffer"); |
93 |
return 0; |
94 |
} |
95 |
|
96 |
rem--; |
97 |
return *cur++; |
98 |
} |
99 |
|
100 |
static U32 |
101 |
getb (void) |
102 |
{ |
103 |
U32 res = 0; |
104 |
|
105 |
for (;;) |
106 |
{ |
107 |
U8 c = get8 (); |
108 |
res = (res << 7) | (c & 0x7f); |
109 |
|
110 |
if (!(c & 0x80)) |
111 |
return res; |
112 |
} |
113 |
} |
114 |
|
115 |
#ifdef BENCHMARK |
116 |
static double t1; |
117 |
|
118 |
static double |
119 |
tstamp (void) |
120 |
{ |
121 |
struct timeval tv; |
122 |
gettimeofday (&tv, 0); |
123 |
return tv.tv_sec + tv.tv_usec * 0.000001; |
124 |
} |
125 |
#endif |
126 |
|
127 |
static U32 |
128 |
process_length (void) |
129 |
{ |
130 |
U32 res = get8 (); |
131 |
|
132 |
if (res & 0x80) |
133 |
{ |
134 |
int cnt = res & 0x7f; |
135 |
res = 0; |
136 |
|
137 |
switch (cnt) |
138 |
{ |
139 |
case 0: |
140 |
error ("Indefinite ASN.1 lengths not supported"); |
141 |
return 0; |
142 |
|
143 |
default: |
144 |
error ("ASN.1 length too long"); |
145 |
return 0; |
146 |
|
147 |
case 4: res = (res << 8) | get8 (); |
148 |
case 3: res = (res << 8) | get8 (); |
149 |
case 2: res = (res << 8) | get8 (); |
150 |
case 1: res = (res << 8) | get8 (); |
151 |
} |
152 |
} |
153 |
|
154 |
return res; |
155 |
} |
156 |
|
157 |
static U32 |
158 |
process_integer32 (void) |
159 |
{ |
160 |
U32 length = process_length (); |
161 |
|
162 |
if (length <= 0) |
163 |
{ |
164 |
error ("INTEGER32 length equal to zero"); |
165 |
return 0; |
166 |
} |
167 |
|
168 |
U8 *data = getn (length, 0); |
169 |
|
170 |
if (!data) |
171 |
return 0; |
172 |
|
173 |
if (length > 5 || (length > 4 && data [0])) |
174 |
{ |
175 |
error ("INTEGER32 length too long"); |
176 |
return 0; |
177 |
} |
178 |
|
179 |
U32 res = data [0] & 0x80 ? 0xffffffff : 0; |
180 |
|
181 |
while (length--) |
182 |
res = (res << 8) | *data++; |
183 |
|
184 |
return res; |
185 |
} |
186 |
|
187 |
static SV * |
188 |
process_integer32_sv (void) |
189 |
{ |
190 |
return newSViv ((I32)process_integer32 ()); |
191 |
} |
192 |
|
193 |
static SV * |
194 |
process_unsigned32_sv (void) |
195 |
{ |
196 |
return newSVuv ((U32)process_integer32 ()); |
197 |
} |
198 |
|
199 |
#if IVSIZE >= 8 |
200 |
|
201 |
static U64TYPE |
202 |
process_integer64 (void) |
203 |
{ |
204 |
U32 length = process_length (); |
205 |
|
206 |
if (length <= 0) |
207 |
{ |
208 |
error ("INTEGER64 length equal to zero"); |
209 |
return 0; |
210 |
} |
211 |
|
212 |
U8 *data = getn (length, 0); |
213 |
|
214 |
if (!data) |
215 |
return 0; |
216 |
|
217 |
if (length > 9 || (length > 8 && data [0])) |
218 |
{ |
219 |
error ("INTEGER64 length too long"); |
220 |
return 0; |
221 |
} |
222 |
|
223 |
U64TYPE res = data [0] & 0x80 ? 0xffffffffffffffff : 0; |
224 |
|
225 |
while (length--) |
226 |
res = (res << 8) | *data++; |
227 |
|
228 |
return res; |
229 |
} |
230 |
|
231 |
static SV * |
232 |
process_integer64_sv (void) |
233 |
{ |
234 |
return newSViv ((I64TYPE)process_integer64 ()); |
235 |
} |
236 |
|
237 |
static SV * |
238 |
process_unsigned64_sv (void) |
239 |
{ |
240 |
return newSVuv ((U64TYPE)process_integer64 ()); |
241 |
} |
242 |
|
243 |
#endif |
244 |
|
245 |
static SV * |
246 |
process_octet_string_sv (void) |
247 |
{ |
248 |
U32 length = process_length (); |
249 |
|
250 |
U8 *data = getn (length, 0); |
251 |
if (!data) |
252 |
{ |
253 |
error ("OCTET STRING too long"); |
254 |
return &PL_sv_undef; |
255 |
} |
256 |
|
257 |
return newSVpvn (data, length); |
258 |
} |
259 |
|
260 |
static char * |
261 |
write_uv (char *buf, U32 u) |
262 |
{ |
263 |
// the one-digit case is absolutely predominant |
264 |
if (u < 10) |
265 |
*buf++ = u + '0'; |
266 |
else |
267 |
buf += sprintf (buf, "%u", (unsigned int)u); |
268 |
|
269 |
return buf; |
270 |
} |
271 |
|
272 |
static SV * |
273 |
process_object_identifier_sv (void) |
274 |
{ |
275 |
U32 length = process_length (); |
276 |
|
277 |
if (length <= 0) |
278 |
{ |
279 |
error ("OBJECT IDENTIFIER length equal to zero"); |
280 |
return &PL_sv_undef; |
281 |
} |
282 |
|
283 |
U8 *end = cur + length; |
284 |
U32 w = getb (); |
285 |
|
286 |
static char oid[MAX_OID_STRLEN]; // must be static |
287 |
char *app = oid; |
288 |
|
289 |
if (leading_dot < 0) |
290 |
leading_dot = SvTRUE (*hv_fetch ((HV *)SvRV (msg), "_leading_dot", sizeof ("_leading_dot") - 1, 1)); |
291 |
|
292 |
*app = '.'; app += ! ! leading_dot; |
293 |
app = write_uv (app, (U8)w / 40); |
294 |
*app++ = '.'; |
295 |
app = write_uv (app, (U8)w % 40); |
296 |
|
297 |
// we assume an oid component is never > 64 bytes |
298 |
while (cur < end && oid + sizeof (oid) - app > 64) |
299 |
{ |
300 |
w = getb (); |
301 |
*app++ = '.'; |
302 |
app = write_uv (app, w); |
303 |
} |
304 |
|
305 |
return newSVpvn (oid, app - oid); |
306 |
} |
307 |
|
308 |
static AV *av_type; |
309 |
|
310 |
static SV * |
311 |
process_sv (int *found) |
312 |
{ |
313 |
int type = get8 (); |
314 |
|
315 |
*found = type; |
316 |
|
317 |
SV *res; |
318 |
|
319 |
switch (type) |
320 |
{ |
321 |
case ASN_OBJECT_IDENTIFIER: |
322 |
res = process_object_identifier_sv (); |
323 |
break; |
324 |
|
325 |
case ASN_INTEGER32: |
326 |
res = process_integer32_sv (); |
327 |
break; |
328 |
|
329 |
case ASN_UNSIGNED32: |
330 |
case ASN_COUNTER32: |
331 |
case ASN_TIMETICKS: |
332 |
res = process_unsigned32_sv (); |
333 |
break; |
334 |
|
335 |
case ASN_SEQUENCE: |
336 |
res = newSVuv (process_length ()); |
337 |
break; |
338 |
|
339 |
case ASN_OCTET_STRING: |
340 |
case ASN_OPAQUE: |
341 |
res = process_octet_string_sv (); |
342 |
break; |
343 |
|
344 |
default: |
345 |
{ |
346 |
if (type > AvFILLp (av_type) || !SvTYPE (AvARRAY (av_type)[type]) == SVt_PVCV) |
347 |
{ |
348 |
error ("Unknown ASN.1 type"); |
349 |
return &PL_sv_undef; |
350 |
} |
351 |
|
352 |
dSP; |
353 |
PUSHMARK (SP); |
354 |
EXTEND (SP, 2); |
355 |
PUSHs (msg); |
356 |
PUSHs (sv_2mortal (newSViv (type))); |
357 |
PUTBACK; |
358 |
int count = call_sv (AvARRAY (av_type)[type], G_SCALAR); |
359 |
SPAGAIN; |
360 |
res = count ? SvREFCNT_inc (TOPs) : &PL_sv_undef; |
361 |
} |
362 |
} |
363 |
|
364 |
return errflag ? &PL_sv_undef : res; |
365 |
} |
366 |
|
367 |
///////////////////////////////////////////////////////////////////////////// |
368 |
|
369 |
#if HAVE_VERSIONSORT |
370 |
|
371 |
static int |
372 |
oid_lex_cmp (const void *a_, const void *b_) |
373 |
{ |
374 |
const char *a = SvPVX (*(SV **)a_); |
375 |
const char *b = SvPVX (*(SV **)b_); |
376 |
|
377 |
a += *a == '.'; |
378 |
b += *b == '.'; |
379 |
|
380 |
return strverscmp (a, b); |
381 |
} |
382 |
|
383 |
#endif |
384 |
|
385 |
MODULE = Net::SNMP::XS PACKAGE = Net::SNMP::XS |
386 |
|
387 |
PROTOTYPES: ENABLE |
388 |
|
389 |
BOOT: |
390 |
av_type = newAV (); |
391 |
|
392 |
void |
393 |
set_type (int type, SV *cv) |
394 |
CODE: |
395 |
av_store (av_type, type, SvREFCNT_inc (x_get_cv (cv))); |
396 |
|
397 |
void |
398 |
set_msg (SV *msg_, SV *buf_) |
399 |
CODE: |
400 |
{ |
401 |
if (msg) |
402 |
croak ("recursive invocation of Net::SNMP::XS parser is not supported"); |
403 |
|
404 |
errflag = 0; |
405 |
leading_dot = -1; |
406 |
msg = SvREFCNT_inc (msg_); |
407 |
buf = SvPVbyte (buf_, len); |
408 |
cur = buf; |
409 |
rem = len; |
410 |
#ifdef BENCHMARK |
411 |
t1 = tstamp (); |
412 |
#endif |
413 |
} |
414 |
|
415 |
void |
416 |
clr_msg () |
417 |
CODE: |
418 |
SvREFCNT_dec (msg); msg = 0; |
419 |
buf = cur = (U8 *)""; |
420 |
len = rem = 0; |
421 |
#ifdef BENCHMARK |
422 |
printf ("%f\n", tstamp () - t1);//D |
423 |
#endif |
424 |
|
425 |
MODULE = Net::SNMP::XS PACKAGE = Net::SNMP::Message |
426 |
|
427 |
void |
428 |
_buffer_get (SV *self, int count = -1) |
429 |
PPCODE: |
430 |
{ |
431 |
// grrr. |
432 |
if (count < 0) |
433 |
{ |
434 |
hv_delete ((HV *)SvRV (self), "_index" , 6, G_DISCARD); |
435 |
hv_delete ((HV *)SvRV (self), "_length", 7, G_DISCARD); |
436 |
SV **svp = hv_fetch ((HV *)SvRV (self), "_buffer", 7, 1); |
437 |
XPUSHs (sv_2mortal (newSVsv (*svp))); |
438 |
sv_setpvn (*svp, "", 0); |
439 |
XSRETURN (1); |
440 |
} |
441 |
|
442 |
char *data = getn (count, 0); |
443 |
|
444 |
if (data) |
445 |
XPUSHs (sv_2mortal (newSVpvn (data, count))); |
446 |
} |
447 |
|
448 |
U32 |
449 |
index (SV *self, int ndx = -1) |
450 |
CODE: |
451 |
{ |
452 |
if (ndx >= 0 && ndx < len) |
453 |
{ |
454 |
cur = buf + ndx; |
455 |
rem = len - ndx; |
456 |
} |
457 |
|
458 |
RETVAL = cur - buf; |
459 |
} |
460 |
OUTPUT: |
461 |
RETVAL |
462 |
|
463 |
U32 |
464 |
_process_length (SV *self, ...) |
465 |
ALIAS: |
466 |
_process_sequence = 0 |
467 |
CODE: |
468 |
RETVAL = process_length (); |
469 |
OUTPUT: |
470 |
RETVAL |
471 |
|
472 |
SV * |
473 |
_process_integer32 (SV *self, ...) |
474 |
CODE: |
475 |
RETVAL = process_integer32_sv (); |
476 |
OUTPUT: |
477 |
RETVAL |
478 |
|
479 |
SV * |
480 |
_process_counter (SV *self, ...) |
481 |
ALIAS: |
482 |
_process_gauge = 0 |
483 |
_process_timeticks = 0 |
484 |
CODE: |
485 |
RETVAL = process_unsigned32_sv (); |
486 |
OUTPUT: |
487 |
RETVAL |
488 |
|
489 |
#if IVSIZE >= 8 |
490 |
|
491 |
SV * |
492 |
_process_counter64 (SV *self, ...) |
493 |
CODE: |
494 |
RETVAL = process_unsigned64_sv (); |
495 |
OUTPUT: |
496 |
RETVAL |
497 |
|
498 |
#endif |
499 |
|
500 |
SV * |
501 |
_process_object_identifier (SV *self, ...) |
502 |
CODE: |
503 |
RETVAL = process_object_identifier_sv (); |
504 |
OUTPUT: |
505 |
RETVAL |
506 |
|
507 |
SV * |
508 |
_process_octet_string (SV *self, ...) |
509 |
ALIAS: |
510 |
_process_opaque = 0 |
511 |
CODE: |
512 |
RETVAL = process_octet_string_sv (); |
513 |
OUTPUT: |
514 |
RETVAL |
515 |
|
516 |
SV * |
517 |
_process_ipaddress (SV *self, ...) |
518 |
CODE: |
519 |
{ |
520 |
U32 length = process_length (); |
521 |
if (length != 4) |
522 |
{ |
523 |
error ("IP ADDRESS length not four"); |
524 |
XSRETURN_UNDEF; |
525 |
} |
526 |
|
527 |
U8 *data = getn (4, "\x00\x00\x00\x00"); |
528 |
RETVAL = newSVpvf ("%d.%d.%d.%d", data [0], data [1], data [2], data [3]); |
529 |
} |
530 |
OUTPUT: |
531 |
RETVAL |
532 |
|
533 |
SV * |
534 |
process (SV *self, SV *expected = &PL_sv_undef, SV *found = 0) |
535 |
CODE: |
536 |
{ |
537 |
int type; |
538 |
|
539 |
RETVAL = process_sv (&type); |
540 |
|
541 |
if (found) |
542 |
sv_setiv (found, type); |
543 |
|
544 |
if (SvOK (expected) && type != SvIV (expected)) |
545 |
error ("Expected a different type than found"); |
546 |
} |
547 |
OUTPUT: |
548 |
RETVAL |
549 |
|
550 |
MODULE = Net::SNMP::XS PACKAGE = Net::SNMP::PDU |
551 |
|
552 |
SV * |
553 |
_process_var_bind_list (SV *self) |
554 |
CODE: |
555 |
{ |
556 |
if (get8 () != ASN_SEQUENCE) |
557 |
error ("SEQUENCE expected at beginning of VarBindList"); |
558 |
int seqlen = process_length (); |
559 |
U8 *end = cur + seqlen; |
560 |
|
561 |
HV *list = newHV (); |
562 |
AV *names = newAV (); |
563 |
HV *types = newHV (); |
564 |
|
565 |
hv_store ((HV *)SvRV (self), "_var_bind_list" , sizeof ("_var_bind_list" ) - 1, newRV_noinc ((SV *)list ), 0); |
566 |
hv_store ((HV *)SvRV (self), "_var_bind_names", sizeof ("_var_bind_names") - 1, newRV_noinc ((SV *)names), 0); |
567 |
hv_store ((HV *)SvRV (self), "_var_bind_types", sizeof ("_var_bind_types") - 1, newRV_noinc ((SV *)types), 0); |
568 |
|
569 |
while (cur < end && !errflag) |
570 |
{ |
571 |
// SEQUENCE ObjectName ObjectSyntax |
572 |
if (get8 () != ASN_SEQUENCE) |
573 |
error ("SEQUENCE expected at beginning of VarBind"); |
574 |
process_length (); |
575 |
|
576 |
if (get8 () != ASN_OBJECT_IDENTIFIER) |
577 |
error ("OBJECT IDENTIFIER expected at beginning of VarBind"); |
578 |
int type, oidlen; |
579 |
SV *oid = process_object_identifier_sv (); |
580 |
SV *val = process_sv (&type); |
581 |
|
582 |
hv_store_ent (types, oid, newSViv (type), 0); |
583 |
hv_store_ent (list , oid, val, 0); |
584 |
av_push (names, oid); |
585 |
} |
586 |
|
587 |
//return $this->_report_pdu_error if ($this->{_pdu_type} == REPORT); |
588 |
|
589 |
RETVAL = newRV_inc ((SV *)list); |
590 |
} |
591 |
OUTPUT: |
592 |
RETVAL |
593 |
|
594 |
MODULE = Net::SNMP::XS PACKAGE = Net::SNMP |
595 |
|
596 |
void |
597 |
oid_base_match (SV *base_, SV *oid_) |
598 |
PROTOTYPE: $$ |
599 |
ALIAS: |
600 |
oid_context_match = 0 |
601 |
PPCODE: |
602 |
{ |
603 |
if (!SvOK (base_) || !SvOK (oid_)) |
604 |
XSRETURN_NO; |
605 |
|
606 |
STRLEN blen, olen; |
607 |
char *base = SvPV (base_, blen); |
608 |
char *oid = SvPV (oid_ , olen); |
609 |
|
610 |
blen -= *base == '.'; base += *base == '.'; |
611 |
olen -= *base == '.'; oid += *oid == '.'; |
612 |
|
613 |
if (olen < blen) |
614 |
XSRETURN_NO; |
615 |
|
616 |
if (memcmp (base, oid, blen)) |
617 |
XSRETURN_NO; |
618 |
|
619 |
if (oid [blen] && oid [blen] != '.') |
620 |
XSRETURN_NO; |
621 |
|
622 |
XSRETURN_YES; |
623 |
} |
624 |
|
625 |
#if HAVE_VERSIONSORT |
626 |
|
627 |
void |
628 |
oid_lex_sort (...) |
629 |
PROTOTYPE: @ |
630 |
PPCODE: |
631 |
{ |
632 |
// make sure SvPVX is valid |
633 |
int i; |
634 |
for (i = items; i--; ) |
635 |
{ |
636 |
SV *sv = ST (i); |
637 |
|
638 |
if (SvTYPE (sv) < SVt_PV || SvTYPE (sv) == SVt_PVAV && SvTYPE (sv) == SVt_PVHV) |
639 |
SvPV_force_nolen (sv); |
640 |
} |
641 |
|
642 |
qsort (&ST (0), items, sizeof (SV *), oid_lex_cmp); |
643 |
|
644 |
EXTEND (SP, items); |
645 |
// we cheat somewhat by not returning copies here |
646 |
for (i = 0; i < items; ++i) |
647 |
PUSHs (sv_2mortal (SvREFCNT_inc (ST (i)))); |
648 |
} |
649 |
|
650 |
int |
651 |
_index_cmp (const char *a, const char *b) |
652 |
PROTOTYPE: $$ |
653 |
CODE: |
654 |
RETVAL = strverscmp (a, b); |
655 |
OUTPUT: |
656 |
RETVAL |
657 |
|
658 |
#endif |
659 |
|