| 1 |
#if defined(__linux) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__CYGWIN__) |
| 2 |
# define ENABLE_IPV6 1 // if you get compilation problems try to disable IPv6 |
| 3 |
#else |
| 4 |
# define ENABLE_IPV6 0 |
| 5 |
#endif |
| 6 |
|
| 7 |
#include "EXTERN.h" |
| 8 |
#include "perl.h" |
| 9 |
#include "XSUB.h" |
| 10 |
|
| 11 |
#include <pthread.h> |
| 12 |
|
| 13 |
#include <stdio.h> |
| 14 |
#include <stdlib.h> |
| 15 |
#include <string.h> |
| 16 |
|
| 17 |
#include <time.h> |
| 18 |
#include <poll.h> |
| 19 |
#include <unistd.h> |
| 20 |
#include <inttypes.h> |
| 21 |
#include <fcntl.h> |
| 22 |
#include <errno.h> |
| 23 |
|
| 24 |
#include <sys/types.h> |
| 25 |
#include <sys/time.h> |
| 26 |
#include <sys/socket.h> |
| 27 |
|
| 28 |
#include <netinet/in.h> |
| 29 |
#include <arpa/inet.h> |
| 30 |
|
| 31 |
#ifdef __linux |
| 32 |
# include <linux/icmp.h> |
| 33 |
#endif |
| 34 |
#if ENABLE_IPV6 && !defined (__CYGWIN__) |
| 35 |
# include <netinet/icmp6.h> |
| 36 |
#endif |
| 37 |
|
| 38 |
#define ICMP4_ECHO 8 |
| 39 |
#define ICMP4_ECHO_REPLY 0 |
| 40 |
#define ICMP6_ECHO 128 |
| 41 |
#define ICMP6_ECHO_REPLY 129 |
| 42 |
|
| 43 |
#define DRAIN_INTERVAL 1e-6 // how long to wait when sendto returns ENOBUFS, in seconds |
| 44 |
#define MIN_INTERVAL 1e-6 // minimum packet send interval, in seconds |
| 45 |
|
| 46 |
#define HDR_SIZE_IP4 20 |
| 47 |
#define HDR_SIZE_IP6 48 |
| 48 |
|
| 49 |
//TODO: xread/xwrite for atomicity? we currently rely on the fact that the pip buffersize divides exactly by pointer sizes |
| 50 |
|
| 51 |
typedef uint8_t addr_tt[16]; |
| 52 |
|
| 53 |
static int thr_res[2]; // receive from worker(s) |
| 54 |
static int icmp4_fd = -1, icmp6_fd = -1; |
| 55 |
|
| 56 |
/*****************************************************************************/ |
| 57 |
|
| 58 |
typedef double tstamp; |
| 59 |
|
| 60 |
static tstamp |
| 61 |
NOW (void) |
| 62 |
{ |
| 63 |
struct timeval tv; |
| 64 |
|
| 65 |
gettimeofday (&tv, 0); |
| 66 |
|
| 67 |
return tv.tv_sec + tv.tv_usec * 1e-6; |
| 68 |
} |
| 69 |
|
| 70 |
static void |
| 71 |
ssleep (tstamp wait) |
| 72 |
{ |
| 73 |
#if defined (__SVR4) && defined (__sun) |
| 74 |
struct timeval tv; |
| 75 |
|
| 76 |
tv.tv_sec = wait; |
| 77 |
tv.tv_usec = (wait - tv.tv_sec) * 1e6; |
| 78 |
|
| 79 |
select (0, 0, 0, 0, &tv); |
| 80 |
#elif defined(_WIN32) |
| 81 |
Sleep ((unsigned long)(delay * 1e3)); |
| 82 |
#else |
| 83 |
struct timespec ts; |
| 84 |
|
| 85 |
ts.tv_sec = wait; |
| 86 |
ts.tv_nsec = (wait - ts.tv_sec) * 1e9; |
| 87 |
|
| 88 |
nanosleep (&ts, 0); |
| 89 |
#endif |
| 90 |
} |
| 91 |
|
| 92 |
/*****************************************************************************/ |
| 93 |
|
| 94 |
typedef struct |
| 95 |
{ |
| 96 |
uint8_t version_ihl; |
| 97 |
uint8_t tos; |
| 98 |
uint16_t tot_len; |
| 99 |
|
| 100 |
uint16_t id; |
| 101 |
uint16_t flags; |
| 102 |
|
| 103 |
uint8_t ttl; |
| 104 |
uint8_t protocol; |
| 105 |
uint16_t cksum; |
| 106 |
|
| 107 |
uint32_t src; |
| 108 |
uint32_t dst; |
| 109 |
} IP4HDR; |
| 110 |
|
| 111 |
#if 0 |
| 112 |
typedef struct |
| 113 |
{ |
| 114 |
uint8_t version; |
| 115 |
uint8_t x1, x2, x3; |
| 116 |
|
| 117 |
uint16_t payload_len; |
| 118 |
uint8_t nxt_hdr; |
| 119 |
uint8_t hop_limit; |
| 120 |
|
| 121 |
uint8_t src[16]; |
| 122 |
uint8_t dst[16]; |
| 123 |
} IP6HDR; |
| 124 |
#endif |
| 125 |
|
| 126 |
/*****************************************************************************/ |
| 127 |
|
| 128 |
typedef struct |
| 129 |
{ |
| 130 |
tstamp next; |
| 131 |
double interval; |
| 132 |
int addrlen; |
| 133 |
addr_tt lo, hi; |
| 134 |
void *items; |
| 135 |
} RANGE; |
| 136 |
|
| 137 |
typedef struct |
| 138 |
{ |
| 139 |
RANGE **ranges; |
| 140 |
int rangecnt, rangemax; |
| 141 |
|
| 142 |
tstamp interval; |
| 143 |
tstamp maxrtt; |
| 144 |
uint16_t magic1; |
| 145 |
uint16_t magic2; |
| 146 |
uint16_t magic3; |
| 147 |
|
| 148 |
int id; |
| 149 |
|
| 150 |
AV *recvq; /* receive queue */ |
| 151 |
int nextrecv; |
| 152 |
SV *recvcb; |
| 153 |
|
| 154 |
pthread_t thrid; |
| 155 |
int running; |
| 156 |
} PINGER; |
| 157 |
|
| 158 |
static PINGER **pingers; |
| 159 |
static int *pingerfree; /* freelist next */ |
| 160 |
static int pingercnt; |
| 161 |
static int pingermax; |
| 162 |
static int firstfree = -1; |
| 163 |
static int firstrecv = -1; |
| 164 |
|
| 165 |
/*****************************************************************************/ |
| 166 |
|
| 167 |
typedef struct |
| 168 |
{ |
| 169 |
uint8_t type, code; |
| 170 |
uint16_t cksum; |
| 171 |
uint16_t id, seq; |
| 172 |
uint16_t pinger; |
| 173 |
uint16_t magic; |
| 174 |
uint32_t stamp_hi; |
| 175 |
uint32_t stamp_lo; |
| 176 |
} PKT; |
| 177 |
|
| 178 |
static int |
| 179 |
pkt_is_valid_for (PKT *pkt, PINGER *pinger) |
| 180 |
{ |
| 181 |
return pkt->id == pinger->magic1 |
| 182 |
&& pkt->seq == pinger->magic2 |
| 183 |
&& pkt->magic == pinger->magic3; |
| 184 |
} |
| 185 |
|
| 186 |
static void |
| 187 |
ts_to_pkt (PKT *pkt, tstamp ts) |
| 188 |
{ |
| 189 |
/* move 12 bits of seconds into the 32 bit fractional part */ |
| 190 |
/* leaving 20 bits subsecond resolution and 44 bits of integers */ |
| 191 |
/* (of which 32 are typically usable) */ |
| 192 |
ts *= 1. / 4096.; |
| 193 |
|
| 194 |
pkt->stamp_hi = ts; |
| 195 |
pkt->stamp_lo = (ts - pkt->stamp_hi) * 4294967296.; |
| 196 |
} |
| 197 |
|
| 198 |
static tstamp |
| 199 |
pkt_to_ts (PKT *pkt) |
| 200 |
{ |
| 201 |
return pkt->stamp_hi * 4096. |
| 202 |
+ pkt->stamp_lo * (4096. / 4294967296.); |
| 203 |
} |
| 204 |
|
| 205 |
static void |
| 206 |
pkt_cksum (PKT *pkt) |
| 207 |
{ |
| 208 |
uint_fast32_t sum = -pkt->cksum; |
| 209 |
uint32_t *wp = (uint32_t *)pkt; |
| 210 |
int len = sizeof (*pkt) / 4; |
| 211 |
|
| 212 |
do |
| 213 |
{ |
| 214 |
uint_fast32_t w = *(volatile uint32_t *)wp++; |
| 215 |
sum += (w & 0xffff) + (w >> 16); |
| 216 |
} |
| 217 |
while (len--); |
| 218 |
|
| 219 |
sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */ |
| 220 |
sum += sum >> 16; /* add carry */ |
| 221 |
|
| 222 |
pkt->cksum = ~sum; |
| 223 |
} |
| 224 |
|
| 225 |
/*****************************************************************************/ |
| 226 |
|
| 227 |
static void |
| 228 |
range_free (RANGE *self) |
| 229 |
{ |
| 230 |
free (self); |
| 231 |
} |
| 232 |
|
| 233 |
static void |
| 234 |
inc_addr (addr_tt *addr) |
| 235 |
{ |
| 236 |
int len = sizeof (addr_tt) - 1; |
| 237 |
|
| 238 |
while (!++(*addr)[len]) |
| 239 |
--len; |
| 240 |
} |
| 241 |
|
| 242 |
/*****************************************************************************/ |
| 243 |
|
| 244 |
/* like sendto, but retries on failure */ |
| 245 |
static void |
| 246 |
xsendto (int fd, void *buf, size_t len, int flags, void *sa, int salen) |
| 247 |
{ |
| 248 |
tstamp wait = 0; |
| 249 |
|
| 250 |
while (sendto (fd, buf, len, flags, sa, salen) < 0 && errno == ENOBUFS) |
| 251 |
ssleep (wait += DRAIN_INTERVAL); |
| 252 |
} |
| 253 |
|
| 254 |
static void |
| 255 |
send_ping (PKT *pkt, addr_tt *addr, int addr_len) |
| 256 |
{ |
| 257 |
pkt->cksum = 0; |
| 258 |
|
| 259 |
if (addr_len == 4) |
| 260 |
{ |
| 261 |
struct sockaddr_in sa; |
| 262 |
|
| 263 |
pkt->type = ICMP4_ECHO; |
| 264 |
pkt_cksum (pkt); |
| 265 |
|
| 266 |
sa.sin_family = AF_INET; |
| 267 |
sa.sin_port = 0; |
| 268 |
|
| 269 |
memcpy (&sa.sin_addr, |
| 270 |
sizeof (addr_tt) - sizeof (sa.sin_addr) + (char *)addr, |
| 271 |
sizeof (sa.sin_addr)); |
| 272 |
|
| 273 |
xsendto (icmp4_fd, pkt, sizeof (*pkt), 0, &sa, sizeof (sa)); |
| 274 |
} |
| 275 |
else |
| 276 |
{ |
| 277 |
#if ENABLE_IPV6 |
| 278 |
struct sockaddr_in6 sa; |
| 279 |
|
| 280 |
pkt->type = ICMP6_ECHO; |
| 281 |
|
| 282 |
sa.sin6_family = AF_INET6; |
| 283 |
sa.sin6_port = 0; |
| 284 |
sa.sin6_flowinfo = 0; |
| 285 |
sa.sin6_scope_id = 0; |
| 286 |
|
| 287 |
memcpy (&sa.sin6_addr, |
| 288 |
sizeof (addr_tt) - sizeof (sa.sin6_addr) + (char *)addr, |
| 289 |
sizeof (sa.sin6_addr)); |
| 290 |
|
| 291 |
xsendto (icmp6_fd, &pkt, sizeof (pkt), 0, &sa, sizeof (sa)); |
| 292 |
#endif |
| 293 |
} |
| 294 |
} |
| 295 |
|
| 296 |
static void |
| 297 |
downheap (PINGER *self) |
| 298 |
{ |
| 299 |
RANGE *elem = self->ranges [0]; /* always exists */ |
| 300 |
int Nm1 = self->rangecnt - 1; |
| 301 |
int j; |
| 302 |
int k; |
| 303 |
|
| 304 |
for (k = 0; ; ) |
| 305 |
{ |
| 306 |
int j = k * 2 + 1; |
| 307 |
|
| 308 |
if (j > Nm1) |
| 309 |
break; |
| 310 |
|
| 311 |
if (j < Nm1 |
| 312 |
&& self->ranges [j]->next > self->ranges [j + 1]->next) |
| 313 |
++j; |
| 314 |
|
| 315 |
if (self->ranges [j]->next >= elem->next) |
| 316 |
break; |
| 317 |
|
| 318 |
self->ranges [k] = self->ranges [j]; |
| 319 |
|
| 320 |
k = j; |
| 321 |
} |
| 322 |
|
| 323 |
self->ranges [k] = elem; |
| 324 |
} |
| 325 |
|
| 326 |
static void |
| 327 |
upheap (PINGER *self, int k) |
| 328 |
{ |
| 329 |
RANGE *elem = self->ranges [k]; |
| 330 |
|
| 331 |
while (k) |
| 332 |
{ |
| 333 |
int j = (k - 1) >> 1; |
| 334 |
|
| 335 |
if (self->ranges [j]->next <= elem->next) |
| 336 |
break; |
| 337 |
|
| 338 |
self->ranges [k] = self->ranges [j]; |
| 339 |
|
| 340 |
k = j; |
| 341 |
} |
| 342 |
|
| 343 |
self->ranges [k] = elem; |
| 344 |
} |
| 345 |
|
| 346 |
static void * |
| 347 |
ping_proc (void *self_) |
| 348 |
{ |
| 349 |
PINGER *self = (PINGER *)self_; |
| 350 |
PKT pkt; |
| 351 |
|
| 352 |
memset (&pkt, 0, sizeof (pkt)); |
| 353 |
|
| 354 |
tstamp now = NOW (); |
| 355 |
tstamp next = now; |
| 356 |
|
| 357 |
pkt.code = 0; |
| 358 |
pkt.id = self->magic1; |
| 359 |
pkt.seq = self->magic2; |
| 360 |
pkt.magic = self->magic3; |
| 361 |
pkt.pinger = self->id; |
| 362 |
|
| 363 |
while (self->rangecnt) |
| 364 |
{ |
| 365 |
RANGE *range = self->ranges [0]; |
| 366 |
int n, k; |
| 367 |
|
| 368 |
// ranges [0] is always the next range to ping |
| 369 |
tstamp wait = range->next - now; |
| 370 |
|
| 371 |
// compare with the global frequency limit |
| 372 |
{ |
| 373 |
tstamp diff = next - now; |
| 374 |
|
| 375 |
if (wait < diff) |
| 376 |
wait = diff; |
| 377 |
else if (range) |
| 378 |
next = range->next; |
| 379 |
} |
| 380 |
|
| 381 |
if (wait > 0.) |
| 382 |
ssleep (wait); |
| 383 |
|
| 384 |
now = NOW (); |
| 385 |
|
| 386 |
ts_to_pkt (&pkt, now); |
| 387 |
|
| 388 |
send_ping (&pkt, &range->lo, range->addrlen); |
| 389 |
|
| 390 |
if (!memcmp (&range->lo, &range->hi, sizeof (addr_tt))) |
| 391 |
{ |
| 392 |
self->ranges [0] = self->ranges [--self->rangecnt]; |
| 393 |
range_free (range); |
| 394 |
} |
| 395 |
else |
| 396 |
{ |
| 397 |
inc_addr (&range->lo); |
| 398 |
|
| 399 |
range->next = next; |
| 400 |
range->next += range->interval; |
| 401 |
|
| 402 |
downheap (self); |
| 403 |
} |
| 404 |
|
| 405 |
next += self->interval; |
| 406 |
} |
| 407 |
|
| 408 |
ssleep (self->maxrtt); |
| 409 |
|
| 410 |
{ |
| 411 |
uint16_t id = self->id; |
| 412 |
|
| 413 |
write (thr_res [1], &id, sizeof (id)); |
| 414 |
} |
| 415 |
|
| 416 |
return 0; |
| 417 |
} |
| 418 |
|
| 419 |
/*****************************************************************************/ |
| 420 |
|
| 421 |
static void |
| 422 |
pinger_start (PINGER *self) |
| 423 |
{ |
| 424 |
sigset_t fullsigset, oldsigset; |
| 425 |
pthread_attr_t attr; |
| 426 |
|
| 427 |
if (self->running) |
| 428 |
return; |
| 429 |
|
| 430 |
sigfillset (&fullsigset); |
| 431 |
|
| 432 |
pthread_attr_init (&attr); |
| 433 |
pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 2048 ? sizeof (long) * 2048 : PTHREAD_STACK_MIN); |
| 434 |
|
| 435 |
pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset); |
| 436 |
|
| 437 |
if (pthread_create (&self->thrid, &attr, ping_proc, (void *)self)) |
| 438 |
croak ("AnyEvent::FastPing: unable to create pinger thread"); |
| 439 |
|
| 440 |
pthread_sigmask (SIG_SETMASK, &oldsigset, 0); |
| 441 |
|
| 442 |
self->running = 1; |
| 443 |
} |
| 444 |
|
| 445 |
static void |
| 446 |
pinger_stop (PINGER *self) |
| 447 |
{ |
| 448 |
if (!self->running) |
| 449 |
return; |
| 450 |
|
| 451 |
self->running = 0; |
| 452 |
pthread_cancel (self->thrid); |
| 453 |
pthread_join (self->thrid, 0); |
| 454 |
} |
| 455 |
|
| 456 |
static void |
| 457 |
pinger_init (PINGER *self) |
| 458 |
{ |
| 459 |
memset (self, 0, sizeof (PINGER)); |
| 460 |
|
| 461 |
if (firstfree >= 0) |
| 462 |
{ |
| 463 |
self->id = firstfree; |
| 464 |
firstfree = pingerfree [firstfree]; |
| 465 |
} |
| 466 |
else if (pingercnt == 0xffff) |
| 467 |
croak ("unable to create more than 65536 AnyEvent::FastPing objects"); |
| 468 |
else |
| 469 |
{ |
| 470 |
if (pingercnt == pingermax) |
| 471 |
{ |
| 472 |
pingermax = pingermax * 2 + 16; |
| 473 |
pingers = realloc (pingers , sizeof (pingers [0]) * pingermax); |
| 474 |
pingerfree = realloc (pingerfree, sizeof (pingerfree [0]) * pingermax); |
| 475 |
} |
| 476 |
|
| 477 |
self->id = pingercnt++; |
| 478 |
} |
| 479 |
|
| 480 |
pingers [self->id] = self; |
| 481 |
|
| 482 |
self->recvcb = &PL_sv_undef; |
| 483 |
self->interval = MIN_INTERVAL; |
| 484 |
self->maxrtt = 0.5; |
| 485 |
self->rangemax = 16; |
| 486 |
self->ranges = malloc (sizeof (self->ranges [0]) * self->rangemax); |
| 487 |
} |
| 488 |
|
| 489 |
static void |
| 490 |
pinger_free (PINGER *self) |
| 491 |
{ |
| 492 |
pinger_stop (self); |
| 493 |
|
| 494 |
pingers [self->id] = 0; |
| 495 |
|
| 496 |
SvREFCNT_dec (self->recvq); |
| 497 |
SvREFCNT_dec (self->recvcb); |
| 498 |
|
| 499 |
pingerfree [self->id] = firstfree; |
| 500 |
firstfree = self->id; |
| 501 |
|
| 502 |
while (self->rangecnt) |
| 503 |
range_free (self->ranges [--self->rangecnt]); |
| 504 |
|
| 505 |
free (self->ranges); |
| 506 |
} |
| 507 |
|
| 508 |
/*****************************************************************************/ |
| 509 |
|
| 510 |
static void |
| 511 |
recv_feed (PINGER *self, void *addr, int addrlen, tstamp rtt) |
| 512 |
{ |
| 513 |
if (!self->recvq) |
| 514 |
{ |
| 515 |
/* first seen this round */ |
| 516 |
if (!SvOK (self->recvcb)) |
| 517 |
return; |
| 518 |
|
| 519 |
self->recvq = newAV (); |
| 520 |
|
| 521 |
self->nextrecv = firstrecv; |
| 522 |
firstrecv = self->id; |
| 523 |
} |
| 524 |
|
| 525 |
{ |
| 526 |
AV *pkt = newAV (); |
| 527 |
|
| 528 |
av_extend (pkt, 2-1); |
| 529 |
|
| 530 |
AvARRAY (pkt)[0] = newSVpvn (addr, addrlen); |
| 531 |
AvARRAY (pkt)[1] = newSVnv (rtt); |
| 532 |
AvFILLp (pkt) = 2-1; |
| 533 |
|
| 534 |
av_push (self->recvq, newRV_noinc ((SV *)pkt)); |
| 535 |
} |
| 536 |
} |
| 537 |
|
| 538 |
static void |
| 539 |
recv_flush (void) |
| 540 |
{ |
| 541 |
if (firstrecv < 0) |
| 542 |
return; |
| 543 |
|
| 544 |
ENTER; |
| 545 |
SAVETMPS; |
| 546 |
|
| 547 |
while (firstrecv >= 0) |
| 548 |
{ |
| 549 |
dSP; |
| 550 |
PINGER *self = pingers [firstrecv]; |
| 551 |
firstrecv = self->nextrecv; |
| 552 |
|
| 553 |
self->nextrecv = -1; |
| 554 |
|
| 555 |
PUSHMARK (SP); |
| 556 |
XPUSHs (sv_2mortal (newRV_noinc ((SV *)self->recvq))); |
| 557 |
self->recvq = 0; |
| 558 |
PUTBACK; |
| 559 |
call_sv (self->recvcb, G_DISCARD | G_VOID); |
| 560 |
} |
| 561 |
|
| 562 |
FREETMPS; |
| 563 |
LEAVE; |
| 564 |
} |
| 565 |
|
| 566 |
/*****************************************************************************/ |
| 567 |
|
| 568 |
#if 0 |
| 569 |
static void |
| 570 |
feed_reply (AV *res_av) |
| 571 |
{ |
| 572 |
dSP; |
| 573 |
SV *res = sv_2mortal (newRV_inc ((SV *)res_av)); |
| 574 |
int i; |
| 575 |
|
| 576 |
if (av_len (res_av) < 0) |
| 577 |
return; |
| 578 |
|
| 579 |
ENTER; |
| 580 |
SAVETMPS; |
| 581 |
|
| 582 |
for (i = av_len (cbs) + 1; i--; ) |
| 583 |
{ |
| 584 |
SV *cb = *av_fetch (cbs, i, 1); |
| 585 |
|
| 586 |
PUSHMARK (SP); |
| 587 |
XPUSHs (res); |
| 588 |
PUTBACK; |
| 589 |
call_sv (cb, G_DISCARD | G_VOID); |
| 590 |
} |
| 591 |
|
| 592 |
FREETMPS; |
| 593 |
LEAVE; |
| 594 |
} |
| 595 |
#endif |
| 596 |
|
| 597 |
static void |
| 598 |
boot () |
| 599 |
{ |
| 600 |
if (pipe (thr_res) < 0) |
| 601 |
croak ("AnyEvent::FastPing: unable to create receive pipe"); |
| 602 |
|
| 603 |
sv_setiv (get_sv ("AnyEvent::FastPing::THR_RES_FD", 1), thr_res [0]); |
| 604 |
|
| 605 |
icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP); |
| 606 |
fcntl (icmp4_fd, F_SETFL, O_NONBLOCK); |
| 607 |
#ifdef ICMP_FILTER |
| 608 |
{ |
| 609 |
struct icmp_filter oval; |
| 610 |
oval.data = 0xffffffff & ~(1 << ICMP4_ECHO_REPLY); |
| 611 |
setsockopt (icmp4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval); |
| 612 |
} |
| 613 |
#endif |
| 614 |
|
| 615 |
#if ENABLE_IPV6 |
| 616 |
icmp6_fd = socket (AF_INET6, SOCK_RAW, IPPROTO_ICMPV6); |
| 617 |
fcntl (icmp6_fd, F_SETFL, O_NONBLOCK); |
| 618 |
# ifdef ICMP6_FILTER |
| 619 |
{ |
| 620 |
struct icmp6_filter oval; |
| 621 |
ICMP6_FILTER_SETBLOCKALL (&oval); |
| 622 |
ICMP6_FILTER_SETPASS (ICMP6_ECHO_REPLY, &oval); |
| 623 |
setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval); |
| 624 |
} |
| 625 |
# endif |
| 626 |
#endif |
| 627 |
|
| 628 |
sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd); |
| 629 |
sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd); |
| 630 |
} |
| 631 |
|
| 632 |
MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing PREFIX = pinger_ |
| 633 |
|
| 634 |
BOOT: |
| 635 |
{ |
| 636 |
HV *stash = gv_stashpv ("AnyEvent::FastPing", 1); |
| 637 |
|
| 638 |
if (sizeof (PKT) & 3) |
| 639 |
croak ("size of PKT structure is not a multiple of 4"); |
| 640 |
|
| 641 |
boot (); |
| 642 |
|
| 643 |
newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0)); |
| 644 |
newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0)); |
| 645 |
|
| 646 |
newCONSTSUB (stash, "icmp4_pktsize", newSViv (HDR_SIZE_IP4 + sizeof (PKT))); |
| 647 |
newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT))); |
| 648 |
} |
| 649 |
|
| 650 |
PROTOTYPES: DISABLE |
| 651 |
|
| 652 |
void |
| 653 |
_new (SV *klass, UV magic1, UV magic2, UV magic3) |
| 654 |
PPCODE: |
| 655 |
{ |
| 656 |
SV *pv = NEWSV (0, sizeof (PINGER)); |
| 657 |
PINGER *self = (PINGER *)SvPVX (pv); |
| 658 |
SvPOK_only (pv); |
| 659 |
XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), gv_stashpv (SvPV_nolen (klass), 1)))); |
| 660 |
pinger_init (self); |
| 661 |
self->magic1 = magic1; |
| 662 |
self->magic2 = magic2; |
| 663 |
self->magic3 = magic3; |
| 664 |
} |
| 665 |
|
| 666 |
void |
| 667 |
_free (PINGER *self) |
| 668 |
CODE: |
| 669 |
pinger_free (self); |
| 670 |
|
| 671 |
IV |
| 672 |
id (PINGER *self, ...) |
| 673 |
CODE: |
| 674 |
RETVAL = self->id; |
| 675 |
OUTPUT: |
| 676 |
RETVAL |
| 677 |
|
| 678 |
void pinger_start (PINGER *self) |
| 679 |
|
| 680 |
void pinger_stop (PINGER *self) |
| 681 |
|
| 682 |
void _stop_id (UV id) |
| 683 |
CODE: |
| 684 |
if (id < pingercnt && pingers [id]) |
| 685 |
pinger_stop (pingers [id]); |
| 686 |
|
| 687 |
void interval (PINGER *self, NV interval) |
| 688 |
CODE: |
| 689 |
self->interval = interval > MIN_INTERVAL ? interval : MIN_INTERVAL; |
| 690 |
|
| 691 |
void add_range (PINGER *self, SV *lo_, SV *hi_, NV interval) |
| 692 |
CODE: |
| 693 |
{ |
| 694 |
STRLEN lo_len, hi_len; |
| 695 |
char *lo = SvPVbyte (lo_, lo_len); |
| 696 |
char *hi = SvPVbyte (hi_, hi_len); |
| 697 |
RANGE *range; |
| 698 |
|
| 699 |
if (lo_len != hi_len || (lo_len != 4 && lo_len != 16)) |
| 700 |
croak ("AnyEvent::FastPing::add_range address range must be specified as two binary IPv4 or IPv6 addresses"); |
| 701 |
|
| 702 |
if (lo_len == 4 && icmp4_fd < 0) croak ("IPv4 support unavailable"); |
| 703 |
if (lo_len == 16 && icmp6_fd < 0) croak ("IPv6 support unavailable"); |
| 704 |
|
| 705 |
range = calloc (1, sizeof (RANGE)); |
| 706 |
|
| 707 |
range->next = 0; |
| 708 |
range->interval = interval > MIN_INTERVAL ? interval : MIN_INTERVAL; |
| 709 |
range->addrlen = lo_len; |
| 710 |
|
| 711 |
memcpy (sizeof (addr_tt) - lo_len + (char *)&range->lo, lo, lo_len); |
| 712 |
memcpy (sizeof (addr_tt) - lo_len + (char *)&range->hi, hi, lo_len); |
| 713 |
|
| 714 |
if (self->rangecnt == self->rangemax) |
| 715 |
self->ranges = realloc (self->ranges, sizeof (self->ranges [0]) * (self->rangemax <<= 1)); |
| 716 |
|
| 717 |
self->ranges [self->rangecnt] = range; |
| 718 |
upheap (self, self->rangecnt); |
| 719 |
++self->rangecnt; |
| 720 |
} |
| 721 |
|
| 722 |
void |
| 723 |
on_recv (PINGER *self, SV *cb) |
| 724 |
CODE: |
| 725 |
SvREFCNT_dec (self->recvcb); |
| 726 |
self->recvcb = newSVsv (cb); |
| 727 |
|
| 728 |
void |
| 729 |
max_rtt (PINGER *self, NV maxrtt) |
| 730 |
CODE: |
| 731 |
self->maxrtt = maxrtt; |
| 732 |
|
| 733 |
void |
| 734 |
_recv_icmp4 (...) |
| 735 |
CODE: |
| 736 |
{ |
| 737 |
char buf [512]; |
| 738 |
struct sockaddr_in sa; |
| 739 |
|
| 740 |
for (;;) |
| 741 |
{ |
| 742 |
PINGER *pinger; |
| 743 |
IP4HDR *iphdr = (IP4HDR *)buf; |
| 744 |
socklen_t sl = sizeof (sa); |
| 745 |
int len = recvfrom (icmp4_fd, buf, sizeof (buf), MSG_TRUNC, (struct sockaddr *)&sa, &sl); |
| 746 |
int hdrlen, totlen; |
| 747 |
PKT *pkt; |
| 748 |
|
| 749 |
if (len <= HDR_SIZE_IP4) |
| 750 |
break; |
| 751 |
|
| 752 |
hdrlen = (iphdr->version_ihl & 15) * 4; |
| 753 |
totlen = ntohs (iphdr->tot_len); |
| 754 |
|
| 755 |
// packet corrupt? |
| 756 |
if (totlen > len |
| 757 |
|| iphdr->protocol != IPPROTO_ICMP |
| 758 |
|| hdrlen < HDR_SIZE_IP4 || hdrlen + sizeof (PKT) != totlen) |
| 759 |
continue; |
| 760 |
|
| 761 |
pkt = (PKT *)(buf + hdrlen); |
| 762 |
|
| 763 |
if (pkt->type != ICMP4_ECHO_REPLY |
| 764 |
|| pkt->pinger >= pingercnt |
| 765 |
|| !pingers [pkt->pinger]) |
| 766 |
continue; |
| 767 |
|
| 768 |
pinger = pingers [pkt->pinger]; |
| 769 |
|
| 770 |
if (!pkt_is_valid_for (pkt, pinger)) |
| 771 |
continue; |
| 772 |
|
| 773 |
recv_feed (pinger, &sa.sin_addr, 4, NOW () - pkt_to_ts (pkt)); |
| 774 |
} |
| 775 |
|
| 776 |
recv_flush (); |
| 777 |
} |
| 778 |
|
| 779 |
void |
| 780 |
_recv_icmp6 (...) |
| 781 |
CODE: |
| 782 |
{ |
| 783 |
struct sockaddr_in6 sa; |
| 784 |
PKT pkt; |
| 785 |
|
| 786 |
for (;;) |
| 787 |
{ |
| 788 |
PINGER *pinger; |
| 789 |
socklen_t sl = sizeof (sa); |
| 790 |
int len = recvfrom (icmp6_fd, &pkt, sizeof (pkt), MSG_TRUNC, (struct sockaddr *)&sa, &sl); |
| 791 |
|
| 792 |
if (len != sizeof (PKT)) |
| 793 |
break; |
| 794 |
|
| 795 |
if (pkt.type != ICMP6_ECHO_REPLY |
| 796 |
|| pkt.pinger >= pingercnt |
| 797 |
|| !pingers [pkt.pinger]) |
| 798 |
continue; |
| 799 |
|
| 800 |
pinger = pingers [pkt.pinger]; |
| 801 |
|
| 802 |
if (!pkt_is_valid_for (&pkt, pinger)) |
| 803 |
continue; |
| 804 |
|
| 805 |
recv_feed (pinger, &sa.sin6_addr, 16, NOW () - pkt_to_ts (&pkt)); |
| 806 |
} |
| 807 |
|
| 808 |
recv_flush (); |
| 809 |
} |
| 810 |
|
