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