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Comparing AnyEvent-FastPing/FastPing.xs (file contents):
Revision 1.7 by root, Sun Jan 16 17:05:32 2011 UTC vs.
Revision 1.11 by root, Tue Feb 1 04:06:24 2011 UTC

1#if defined(__linux) 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 2# define ENABLE_IPV6 1 // if you get compilation problems try to disable IPv6
3#else 3#else
4# define ENABLE_IPV6 0 4# define ENABLE_IPV6 0
5#endif 5#endif
6 6
… …
8#include "perl.h" 8#include "perl.h"
9#include "XSUB.h" 9#include "XSUB.h"
10 10
11#include <pthread.h> 11#include <pthread.h>
12 12
13#include <math.h>
14#include <stdio.h> 13#include <stdio.h>
15#include <stdlib.h> 14#include <stdlib.h>
16#include <string.h> 15#include <string.h>
17 16
18#include <time.h> 17#include <time.h>
… …
30#include <arpa/inet.h> 29#include <arpa/inet.h>
31 30
32#ifdef __linux 31#ifdef __linux
33# include <linux/icmp.h> 32# include <linux/icmp.h>
34#endif 33#endif
35#if ENABLE_IPV6 34#if ENABLE_IPV6 && !defined (__CYGWIN__)
36# include <netinet/icmp6.h> 35# include <netinet/icmp6.h>
37#endif 36#endif
38 37
39#define ICMP4_ECHO 8 38#define ICMP4_ECHO 8
40#define ICMP4_ECHO_REPLY 0 39#define ICMP4_ECHO_REPLY 0
41#define ICMP6_ECHO 128 40#define ICMP6_ECHO 128
42#define ICMP6_ECHO_REPLY 129 41#define ICMP6_ECHO_REPLY 129
43 42
44#define DRAIN_INTERVAL .000001 // how long to wait when sendto returns ENOBUFS, in seconds 43#define DRAIN_INTERVAL 1e-6 // how long to wait when sendto returns ENOBUFS, in seconds
45#define MIN_INTERVAL .000001 // minimum packet send interval, in seconds 44#define MIN_INTERVAL 1e-6 // minimum packet send interval, in seconds
46 45
47#define HDR_SIZE_IP4 20 46#define HDR_SIZE_IP4 20
48#define HDR_SIZE_IP6 48 47#define HDR_SIZE_IP6 48
49 48
50//TODO: xread/xwrite for atomicity? we currently rely on the fact that the pip buffersize divides exactly by pointer sizes 49static int thr_res[2]; // worker thread finished status
50static int icmp4_fd = -1;
51static int icmp6_fd = -1;
51 52
52typedef uint8_t addr_t[16]; 53/*****************************************************************************/
53 54
54typedef double tstamp; 55typedef double tstamp;
55 56
56static tstamp 57static tstamp
57NOW (void) 58NOW (void)
58{ 59{
59 struct timeval tv; 60 struct timeval tv;
61
60 gettimeofday (&tv, 0); 62 gettimeofday (&tv, 0);
63
61 return tv.tv_sec + tv.tv_usec * 0.000001; 64 return tv.tv_sec + tv.tv_usec * 1e-6;
62} 65}
63 66
67static void
68ssleep (tstamp wait)
69{
70#if defined (__SVR4) && defined (__sun)
71 struct timeval tv;
72
73 tv.tv_sec = wait;
74 tv.tv_usec = (wait - tv.tv_sec) * 1e6;
75
76 select (0, 0, 0, 0, &tv);
77#elif defined(_WIN32)
78 Sleep ((unsigned long)(delay * 1e3));
79#else
80 struct timespec ts;
81
82 ts.tv_sec = wait;
83 ts.tv_nsec = (wait - ts.tv_sec) * 1e9;
84
85 nanosleep (&ts, 0);
86#endif
87}
88
89/*****************************************************************************/
90
64typedef struct { 91typedef struct
65 int family; 92{
66 addr_t lo, hi;
67 double interval;
68 tstamp next;
69} RANGE;
70
71typedef struct {
72 SV *id;
73 double interval;
74 int nranges;
75 RANGE *ranges;
76 uint32_t payload;
77} REQ;
78
79typedef struct {
80 uint8_t version_ihl; 93 uint8_t version_ihl;
81 uint8_t tos; 94 uint8_t tos;
82 uint16_t tot_len; 95 uint16_t tot_len;
83 96
84 uint16_t id; 97 uint16_t id;
… …
90 103
91 uint32_t src; 104 uint32_t src;
92 uint32_t dst; 105 uint32_t dst;
93} IP4HDR; 106} IP4HDR;
94 107
108/*****************************************************************************/
109
110typedef uint8_t addr_tt[16];
111
95typedef struct { 112typedef struct
96 uint8_t version; 113{
97 uint8_t x1, x2, x3; 114 tstamp next;
115 double interval;
116 int addrlen;
98 117
99 uint16_t payload_len; 118 addr_tt lo, hi; /* only if !addrcnt */
100 uint8_t nxt_hdr;
101 uint8_t hop_limit;
102 119
103 uint8_t src[16]; 120 int addrcnt;
104 uint8_t dst[16]; 121 /* addrcnt addresses follow */
105} IP6HDR; 122} RANGE;
106 123
107#define MAGIC 0xca4c
108
109static uint16_t magic;
110
111typedef struct { 124typedef struct
125{
126 RANGE **ranges;
127 int rangecnt, rangemax;
128
129 tstamp interval;
130 tstamp maxrtt;
131 uint16_t magic1;
132 uint16_t magic2;
133 uint16_t magic3;
134
135 int id;
136
137 AV *recvq; /* receive queue */
138 int nextrecv;
139 SV *recvcb;
140
141 pthread_t thrid;
142 int running;
143} PINGER;
144
145static PINGER **pingers;
146static int *pingerfree; /* freelist next */
147static int pingercnt;
148static int pingermax;
149static int firstfree = -1;
150static int firstrecv = -1;
151
152/*****************************************************************************/
153
154typedef struct
155{
112 uint8_t type, code; 156 uint8_t type, code;
113 uint16_t cksum; 157 uint16_t cksum;
158
114 uint16_t id, seq; 159 uint16_t id, seq;
160
161 uint16_t pinger;
162 uint16_t magic;
163
164 uint32_t stamp_hi;
115 uint32_t payload; 165 uint32_t stamp_lo;
116 tstamp stamp; // be careful when accessing this
117} PKT; 166} PKT;
118 167
119static pthread_t pthrid;
120static int thr_send[2]; // send to worker
121static int thr_recv[2]; // receive from worker
122
123static int icmp4_fd, icmp6_fd;
124
125static AV *cbs;
126
127static uint16_t 168static int
128icmp_cksum (void *data, unsigned int len) 169pkt_is_valid_for (PKT *pkt, PINGER *pinger)
129{ 170{
130 register int sum = 0; 171 return pkt->id == pinger->magic1
131 uint16_t *wp; 172 && pkt->seq == pinger->magic2
173 && pkt->magic == pinger->magic3;
174}
132 175
133 assert (~len & 1); 176static void
177ts_to_pkt (PKT *pkt, tstamp ts)
178{
179 /* move 12 bits of seconds into the 32 bit fractional part */
180 /* leaving 20 bits subsecond resolution and 44 bits of integers */
181 /* (of which 32 are typically usable) */
182 ts *= 1. / 4096.;
134 183
135 for (wp = (uint16_t *)data; len; wp++, len -= 2) 184 pkt->stamp_hi = ts;
136 sum += *wp; 185 pkt->stamp_lo = (ts - pkt->stamp_hi) * 4294967296.;
186}
187
188static tstamp
189pkt_to_ts (PKT *pkt)
190{
191 return pkt->stamp_hi * 4096.
192 + pkt->stamp_lo * (4096. / 4294967296.);
193}
194
195static void
196pkt_cksum (PKT *pkt)
197{
198 uint_fast32_t sum = -pkt->cksum;
199 uint32_t *wp = (uint32_t *)pkt;
200 int len = sizeof (*pkt) / 4;
201
202 do
203 {
204 uint_fast32_t w = *(volatile uint32_t *)wp++;
205 sum += (w & 0xffff) + (w >> 16);
206 }
207 while (len--);
137 208
138 sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */ 209 sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */
139 sum += sum >> 16; /* add carry */ 210 sum += sum >> 16; /* add carry */
140 211
212 pkt->cksum = ~sum;
213}
214
215/*****************************************************************************/
216
217static void
218range_free (RANGE *self)
219{
220 free (self);
221}
222
223/* like sendto, but retries on failure */
224static void
225xsendto (int fd, void *buf, size_t len, int flags, void *sa, int salen)
226{
227 tstamp wait = DRAIN_INTERVAL / 2.;
228
229 while (sendto (fd, buf, len, flags, sa, salen) < 0 && errno == ENOBUFS)
230 ssleep (wait *= 2.);
231}
232
233// ping current address, return true and increment if more to ping
234static int
235range_send_ping (RANGE *self, PKT *pkt)
236{
237 // send ping
238 uint8_t *addr;
239
240 if (self->addrcnt)
241 addr = (self->addrcnt - 1) * self->addrlen + (uint8_t *)(self + 1);
242 else
243 addr = sizeof (addr_tt) - self->addrlen + self->lo;
244
245 pkt->cksum = 0;
246
247 if (self->addrlen == 4)
248 {
249 struct sockaddr_in sa;
250
251 pkt->type = ICMP4_ECHO;
252 pkt_cksum (pkt);
253
254 sa.sin_family = AF_INET;
255 sa.sin_port = 0;
256
257 memcpy (&sa.sin_addr, addr, sizeof (sa.sin_addr));
258
259 xsendto (icmp4_fd, pkt, sizeof (*pkt), 0, &sa, sizeof (sa));
260 }
261 else
262 {
263#if ENABLE_IPV6
264 struct sockaddr_in6 sa;
265
266 pkt->type = ICMP6_ECHO;
267
268 sa.sin6_family = AF_INET6;
269 sa.sin6_port = 0;
270 sa.sin6_flowinfo = 0;
271 sa.sin6_scope_id = 0;
272
273 memcpy (&sa.sin6_addr, addr, sizeof (sa.sin6_addr));
274
275 xsendto (icmp6_fd, pkt, sizeof (*pkt), 0, &sa, sizeof (sa));
276#endif
277 }
278
279 // see if we have any more addresses
280 if (self->addrcnt)
281 {
282 if (!--self->addrcnt)
283 return 0;
284 }
285 else
286 {
287 if (!memcmp (&self->lo, &self->hi, sizeof (addr_tt)))
288 return 0;
289
290 // increment self->lo
291 {
292 int len = sizeof (addr_tt) - 1;
293
294 while (!++self->lo [len])
295 --len;
296 }
297 }
298
141 return ~sum; 299 return 1;
142} 300}
143 301
302/*****************************************************************************/
303
304static void
305downheap (PINGER *self)
306{
307 RANGE *elem = self->ranges [0]; /* always exists */
308 int Nm1 = self->rangecnt - 1;
309 int j;
310 int k;
311
312 for (k = 0; ; )
313 {
314 int j = k * 2 + 1;
315
316 if (j > Nm1)
317 break;
318
319 if (j < Nm1
320 && self->ranges [j]->next > self->ranges [j + 1]->next)
321 ++j;
322
323 if (self->ranges [j]->next >= elem->next)
324 break;
325
326 self->ranges [k] = self->ranges [j];
327
328 k = j;
329 }
330
331 self->ranges [k] = elem;
332}
333
334static void
335upheap (PINGER *self, int k)
336{
337 RANGE *elem = self->ranges [k];
338
339 while (k)
340 {
341 int j = (k - 1) >> 1;
342
343 if (self->ranges [j]->next <= elem->next)
344 break;
345
346 self->ranges [k] = self->ranges [j];
347
348 k = j;
349 }
350
351 self->ranges [k] = elem;
352}
353
144static void 354static void *
145inc_addr (addr_t *addr) 355ping_proc (void *self_)
146{ 356{
147 int len = sizeof (addr_t) - 1; 357 PINGER *self = (PINGER *)self_;
358 PKT pkt;
359
360 memset (&pkt, 0, sizeof (pkt));
361
362 tstamp now = NOW ();
363 tstamp next = now;
364
365 pkt.code = 0;
366 pkt.id = self->magic1;
367 pkt.seq = self->magic2;
368 pkt.magic = self->magic3;
369 pkt.pinger = self->id;
370
371 while (self->rangecnt)
372 {
373 RANGE *range = self->ranges [0];
374 int n, k;
375
376 // ranges [0] is always the next range to ping
377 tstamp wait = range->next - now;
378
379 // compare with the global frequency limit
380 {
381 tstamp diff = next - now;
382
383 if (wait < diff)
384 wait = diff;
385 else if (range)
386 next = range->next;
387 }
388
389 if (wait > 0.)
390 ssleep (wait);
391
392 now = NOW ();
393
394 ts_to_pkt (&pkt, now);
395
396 if (!range_send_ping (range, &pkt))
397 {
398 self->ranges [0] = self->ranges [--self->rangecnt];
399 range_free (range);
400 }
401 else
402 {
403 range->next = next;
404 range->next += range->interval;
405 }
406
407 downheap (self);
408
409 next += self->interval;
410 }
411
412 ssleep (self->maxrtt);
413
414 {
415 uint16_t id = self->id;
416
417 write (thr_res [1], &id, sizeof (id));
418 }
419
420 return 0;
421}
422
423/*****************************************************************************/
424
425static void
426pinger_start (PINGER *self)
427{
428 sigset_t fullsigset, oldsigset;
429 pthread_attr_t attr;
430
431 if (self->running)
432 return;
433
434 sigfillset (&fullsigset);
435
436 pthread_attr_init (&attr);
437 pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 2048 ? sizeof (long) * 2048 : PTHREAD_STACK_MIN);
438
439 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
440
441 if (pthread_create (&self->thrid, &attr, ping_proc, (void *)self))
442 croak ("AnyEvent::FastPing: unable to create pinger thread");
443
444 pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
445
446 self->running = 1;
447}
448
449static void
450pinger_stop (PINGER *self)
451{
452 if (!self->running)
453 return;
454
455 self->running = 0;
456 pthread_cancel (self->thrid);
457 pthread_join (self->thrid, 0);
458}
459
460static void
461pinger_init (PINGER *self)
462{
463 memset (self, 0, sizeof (PINGER));
464
465 if (firstfree >= 0)
466 {
467 self->id = firstfree;
468 firstfree = pingerfree [firstfree];
469 }
470 else if (pingercnt == 0xffff)
471 croak ("unable to create more than 65536 AnyEvent::FastPing objects");
472 else
473 {
474 if (pingercnt == pingermax)
475 {
476 pingermax = pingermax * 2 + 16;
477 pingers = realloc (pingers , sizeof (pingers [0]) * pingermax);
478 pingerfree = realloc (pingerfree, sizeof (pingerfree [0]) * pingermax);
479 }
480
481 self->id = pingercnt++;
482 }
483
484 pingers [self->id] = self;
485
486 self->recvcb = &PL_sv_undef;
487 self->interval = MIN_INTERVAL;
488 self->maxrtt = 0.5;
489 self->rangemax = 16;
490 self->ranges = malloc (sizeof (self->ranges [0]) * self->rangemax);
491}
492
493static void
494pinger_free (PINGER *self)
495{
496 pinger_stop (self);
497
498 pingers [self->id] = 0;
499
500 SvREFCNT_dec (self->recvq);
501 SvREFCNT_dec (self->recvcb);
502
503 pingerfree [self->id] = firstfree;
504 firstfree = self->id;
505
506 while (self->rangecnt)
507 range_free (self->ranges [--self->rangecnt]);
508
509 free (self->ranges);
510}
511
512static void
513pinger_add_range (PINGER *self, RANGE *range)
514{
515 if (self->rangecnt == self->rangemax)
516 self->ranges = realloc (self->ranges, sizeof (self->ranges [0]) * (self->rangemax <<= 1));
517
518 self->ranges [self->rangecnt] = range;
519 upheap (self, self->rangecnt);
520 ++self->rangecnt;
521}
522
523/*****************************************************************************/
524
525static void
526recv_feed (PINGER *self, void *addr, int addrlen, tstamp rtt)
527{
528 if (!self->recvq)
529 {
530 /* first seen this round */
531 if (!SvOK (self->recvcb))
532 return;
533
534 self->recvq = newAV ();
535
536 self->nextrecv = firstrecv;
537 firstrecv = self->id;
538 }
539
540 {
541 AV *pkt = newAV ();
542
543 av_extend (pkt, 2-1);
544
545 AvARRAY (pkt)[0] = newSVpvn (addr, addrlen);
546 AvARRAY (pkt)[1] = newSVnv (rtt);
547 AvFILLp (pkt) = 2-1;
548
549 av_push (self->recvq, newRV_noinc ((SV *)pkt));
550 }
551}
552
553static void
554recv_flush (void)
555{
556 if (firstrecv < 0)
557 return;
558
559 ENTER;
560 SAVETMPS;
148 561
149 do 562 do
150 { 563 {
151 if ((*addr)[len] != 0xff) 564 dSP;
152 { 565 PINGER *self = pingers [firstrecv];
153 ++(*addr)[len]; 566 firstrecv = self->nextrecv;
154 break;
155 }
156 567
157 (*addr)[len] = 0; 568 self->nextrecv = -1;
158 }
159 while (len--);
160}
161 569
162static void * 570 PUSHMARK (SP);
163ping_proc (void *unused) 571 XPUSHs (sv_2mortal (newRV_noinc ((SV *)self->recvq)));
164{ 572 self->recvq = 0;
165 PKT pkt; 573 PUTBACK;
166 struct sockaddr_in sa4; 574 call_sv (self->recvcb, G_DISCARD | G_VOID);
167#if ENABLE_IPV6
168 struct sockaddr_in6 sa6;
169#endif
170
171 memset (&pkt, 0, sizeof (pkt));
172
173 memset (&sa4, 0, sizeof (sa4));
174 sa4.sin_family = AF_INET;
175 sa4.sin_port = 0;
176#if ENABLE_IPV6
177 memset (&sa6, 0, sizeof (sa6));
178 sa6.sin6_family = AF_INET6;
179 sa6.sin6_port = 0;
180#endif
181
182 for (;;)
183 {
184 REQ *req;
185 int len = read (thr_send [0], &req, sizeof (req));
186
187 tstamp now = NOW ();
188 tstamp next = now;
189
190 if (!len)
191 pthread_exit (0);
192 else if (len != sizeof (req))
193 {
194 perror ("AnyEvent::FastPing: short read or read error");
195 pthread_exit ((void *)-1);
196 }
197
198 //TODO: bind to source address
199
200 pkt.code = 0;
201 pkt.id = (uint16_t)magic;
202 pkt.seq = (uint16_t)~magic;
203 pkt.payload = req->payload;
204
205 {
206 int r;
207 for (r = req->nranges; r--; )
208 inc_addr (&req->ranges [r].hi);
209 } 575 }
576 while (firstrecv >= 0);
210 577
211 while (req->nranges) 578 FREETMPS;
212 { 579 LEAVE;
213 RANGE *range = req->ranges;
214 int n, k;
215
216 if (!memcmp (&range->lo, &range->hi, sizeof (addr_t)))
217 req->ranges [0] = req->ranges [--req->nranges];
218 else
219 {
220 // ranges [0] is always the next range to ping
221 tstamp wait = range->next - now;
222
223 // compare with the global frequency limit
224 {
225 tstamp diff = next - now;
226
227 if (wait < diff)
228 wait = diff;
229 else if (range)
230 next = range->next;
231 }
232
233 if (wait > 0.)
234 {
235 struct timespec ts;
236
237 ts.tv_sec = wait;
238 ts.tv_nsec = (wait - ts.tv_sec) * 1000000000.;
239
240 nanosleep (&ts, 0);
241 }
242
243 now = NOW ();
244
245 pkt.stamp = now;
246 pkt.cksum = 0;
247
248 if (range->family == AF_INET)
249 {
250 pkt.type = ICMP4_ECHO;
251 pkt.cksum = icmp_cksum (&pkt, sizeof (pkt));
252
253 memcpy (&sa4.sin_addr,
254 sizeof (addr_t) - sizeof (sa4.sin_addr) + (char *)&range->lo,
255 sizeof (sa4.sin_addr));
256
257 if (sendto (icmp4_fd, &pkt, sizeof (pkt), 0, (struct sockaddr *)&sa4, sizeof (sa4)) > 0)
258 errno = 0;
259 }
260 else
261 {
262#if ENABLE_IPV6
263 pkt.type = ICMP6_ECHO;
264
265 memcpy (&sa6.sin6_addr,
266 sizeof (addr_t) - sizeof (sa6.sin6_addr) + (char *)&range->lo,
267 sizeof (sa6.sin6_addr));
268
269 if (sendto (icmp6_fd, &pkt, sizeof (pkt), 0, (struct sockaddr *)&sa6, sizeof (sa6)) > 0)
270 errno = 0;
271#endif
272 }
273
274 if (errno == ENOBUFS)
275 {
276 struct timespec ts;
277
278 ts.tv_sec = 0;
279 ts.tv_nsec = DRAIN_INTERVAL * 1000000000;
280
281 nanosleep (&ts, 0);
282 }
283 else
284 {
285 inc_addr (&range->lo);
286
287 range->next = next;
288 range->next += range->interval;
289 }
290
291 next += req->interval;
292 }
293
294 // make a downheap operation
295 for (n = k = 0; ; )
296 {
297 int j = k * 2 + 1;
298
299 ++n;
300
301 if (j >= req->nranges)
302 break;
303 else if (j < req->nranges - 1)
304 if (req->ranges [j].next > req->ranges [j + 1].next)
305 ++j;
306
307 if (req->ranges [j].next >= req->ranges [k].next)
308 break;
309
310 {
311 RANGE temp = req->ranges [k];
312 req->ranges [k] = req->ranges [j];
313 req->ranges [j] = temp;
314 }
315
316 k = j;
317 }
318 }
319
320 write (thr_recv [1], &req, sizeof (req));
321 }
322
323 return 0;
324} 580}
325 581
582/*****************************************************************************/
583
584#if 0
326static void 585static void
327feed_reply (AV *res_av) 586feed_reply (AV *res_av)
328{ 587{
329 dSP; 588 dSP;
330 SV *res = sv_2mortal (newRV_inc ((SV *)res_av)); 589 SV *res = sv_2mortal (newRV_inc ((SV *)res_av));
… …
347 } 606 }
348 607
349 FREETMPS; 608 FREETMPS;
350 LEAVE; 609 LEAVE;
351} 610}
611#endif
352 612
353static void 613static void
354boot () 614boot ()
355{ 615{
356 sigset_t fullsigset, oldsigset;
357 pthread_attr_t attr;
358
359 if (pipe (thr_send) < 0)
360 croak ("AnyEvent::FastPing: unable to create send pipe");
361
362 if (pipe (thr_recv) < 0) 616 if (pipe (thr_res) < 0)
363 croak ("AnyEvent::FastPing: unable to create receive pipe"); 617 croak ("AnyEvent::FastPing: unable to create receive pipe");
618
619 sv_setiv (get_sv ("AnyEvent::FastPing::THR_RES_FD", 1), thr_res [0]);
364 620
365 icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP); 621 icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);
366 fcntl (icmp4_fd, F_SETFL, O_NONBLOCK); 622 fcntl (icmp4_fd, F_SETFL, O_NONBLOCK);
367#ifdef ICMP_FILTER 623#ifdef ICMP_FILTER
368 { 624 {
… …
383 setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval); 639 setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval);
384 } 640 }
385# endif 641# endif
386#endif 642#endif
387 643
388 pthread_attr_init (&attr);
389 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
390#ifdef PTHREAD_SCOPE_PROCESS
391 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
392#endif
393
394 sigfillset (&fullsigset);
395
396 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
397
398 if (pthread_create (&pthrid, &attr, ping_proc, 0))
399 croak ("AnyEvent::FastPing: unable to create pinger thread");
400
401 pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
402
403 sv_setiv (get_sv ("AnyEvent::FastPing::THR_REQ_FD", 1), thr_send [1]);
404 sv_setiv (get_sv ("AnyEvent::FastPing::THR_RES_FD", 1), thr_recv [0]);
405
406 sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd); 644 sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd);
407 sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd); 645 sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd);
408} 646}
409 647
410MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing 648MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing PREFIX = pinger_
411 649
412BOOT: 650BOOT:
413{ 651{
414 HV *stash = gv_stashpv ("AnyEvent::FastPing", 1); 652 HV *stash = gv_stashpv ("AnyEvent::FastPing", 1);
415 653
416 cbs = get_av ("AnyEvent::FastPing::CB", 1); 654 if (sizeof (PKT) & 3)
417 magic = getpid () ^ MAGIC; 655 croak ("size of PKT structure is not a multiple of 4");
418 656
419 boot (); 657 boot ();
420 658
421 newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0)); 659 newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0));
422 newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0)); 660 newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0));
… …
425 newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT))); 663 newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT)));
426} 664}
427 665
428PROTOTYPES: DISABLE 666PROTOTYPES: DISABLE
429 667
430SV *
431_req_icmp_ping (SV *ranges, NV interval, U32 payload, SV *id)
432 CODE:
433{
434 AV *rav;
435 int nranges, i;
436 REQ *req;
437
438 if (!SvROK (ranges) || SvTYPE (SvRV (ranges)) != SVt_PVAV)
439 croak ("address ranges must be given as arrayref with lo, hi pairs");
440
441 rav = (AV *)SvRV (ranges);
442 nranges = av_len (rav) + 1;
443
444 req = malloc (sizeof (REQ));
445
446 if (interval < MIN_INTERVAL)
447 interval = MIN_INTERVAL;
448
449 req->id = newSVsv (id);
450 req->interval = interval;
451 req->payload = payload;
452 req->nranges = nranges;
453 req->ranges = (RANGE *)malloc (nranges * sizeof (RANGE));
454
455 while (nranges--)
456 {
457 SV *sv = *av_fetch (rav, nranges, 1);
458 SV *lo, *hi;
459 AV *av;
460 RANGE *r;
461
462 if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV)
463 croak ("address range must be given as arrayref with lo, hi, interval arrayrefs");
464
465 av = (AV *)SvRV (sv);
466 r = req->ranges + nranges;
467
468 lo = *av_fetch (av, 0, 1);
469 hi = *av_fetch (av, 1, 1);
470
471 sv_utf8_downgrade (lo, 0);
472 sv_utf8_downgrade (hi, 0);
473
474 memset (&r->lo, 0, sizeof (addr_t));
475 memset (&r->hi, 0, sizeof (addr_t));
476
477 if (SvPOKp (lo) && SvPOKp (hi))
478 {
479 if (SvCUR (lo) != SvCUR (hi))
480 croak ("all addresses in range must be of the same size (either 4 or 16 bytes)");
481
482 if (SvCUR (lo) == 4)
483 {
484 r->family = AF_INET;
485 memcpy (sizeof (addr_t) - 4 + (char *)&r->lo, SvPVX (lo), 4);
486 memcpy (sizeof (addr_t) - 4 + (char *)&r->hi, SvPVX (hi), 4);
487 }
488 else if (SvCUR (lo) == 16)
489 {
490#if ENABLE_IPV6
491 r->family = AF_INET6;
492 memcpy (&r->lo, SvPVX (lo), sizeof (addr_t));
493 memcpy (&r->hi, SvPVX (hi), sizeof (addr_t));
494#else
495 croak ("IPv6 not supported in this configuration");
496#endif
497 }
498 else
499 croak ("addresses in range must be either 4 (IPv4) or 16 (IPv6) bytes in length");
500 }
501 else if (SvIOK (lo) && SvIOK (hi))
502 {
503 uint32_t addr;
504
505 r->family = AF_INET;
506
507 addr = htonl (SvUV (lo)); memcpy (sizeof (addr_t) - 4 + (char *)&r->lo, &addr, 4);
508 addr = htonl (SvUV (hi)); memcpy (sizeof (addr_t) - 4 + (char *)&r->hi, &addr, 4);
509 }
510 else
511 croak ("addresses in range must be strings with either 4 (IPv4) or 16 (IPv6) octets");
512
513 if (r->family == AF_INET)
514 {
515 if (icmp4_fd < 0)
516 croak ("AnyEvent::FastPing: IPv4 ping support not available on this system");
517 }
518 else
519 {
520 if (icmp6_fd < 0)
521 croak ("AnyEvent::FastPing: IPv6 ping support not available on this system");
522 }
523
524 r->interval = SvNV (*av_fetch (av, 2, 1));
525
526 if (r->interval < req->interval)
527 r->interval = req->interval;
528
529 r->next = 0.;
530 }
531
532 RETVAL = newSVpvn ((char *)&req, sizeof (req));
533}
534 OUTPUT:
535 RETVAL
536
537SV *
538_read_res ()
539 CODE:
540{
541 REQ *req;
542
543 if (read (thr_recv [0], &req, sizeof (req)) != sizeof (req))
544 RETVAL = &PL_sv_undef;
545
546 RETVAL = req->id;
547 free (req->ranges);
548 free (req);
549}
550 OUTPUT:
551 RETVAL
552
553void 668void
554_recv_icmp4 (...) 669_recv_icmp4 (...)
555 CODE: 670 CODE:
556{ 671{
557 char buf [512]; 672 char buf [512];
558 struct sockaddr_in sa; 673 struct sockaddr_in sa;
559 socklen_t sl = sizeof (sa); 674 int maxrecv;
560 AV *res_av = av_len (cbs) < 0 ? 0 : (AV *)sv_2mortal ((SV *)newAV ());
561 tstamp now = NOW ();
562 675
563 for (;;) 676 for (maxrecv = 256+1; --maxrecv; )
564 { 677 {
678 PINGER *pinger;
565 IP4HDR *iphdr = (IP4HDR *)buf; 679 IP4HDR *iphdr = (IP4HDR *)buf;
680 socklen_t sl = sizeof (sa);
566 int len = recvfrom (icmp4_fd, buf, sizeof (buf), MSG_TRUNC, (struct sockaddr *)&sa, &sl); 681 int len = recvfrom (icmp4_fd, buf, sizeof (buf), MSG_TRUNC, (struct sockaddr *)&sa, &sl);
567 int hdrlen, totlen; 682 int hdrlen, totlen;
568 PKT *pkt; 683 PKT *pkt;
569 684
570 if (len <= HDR_SIZE_IP4) 685 if (len <= HDR_SIZE_IP4)
571 break; 686 break;
572 687
573 hdrlen = (iphdr->version_ihl & 15) * 4; 688 hdrlen = (iphdr->version_ihl & 15) * 4;
574 totlen = ntohs (iphdr->tot_len); 689 totlen = ntohs (iphdr->tot_len);
575 690
576 // packet corrupt?
577 if (!res_av
578 || totlen > len 691 if (totlen > len
579 || iphdr->protocol != IPPROTO_ICMP 692 || iphdr->protocol != IPPROTO_ICMP
580 || hdrlen < HDR_SIZE_IP4 || hdrlen + sizeof (PKT) != totlen) 693 || hdrlen < HDR_SIZE_IP4 || hdrlen + sizeof (PKT) != totlen)
581 continue; 694 continue;
582 695
583 pkt = (PKT *)(buf + hdrlen); 696 pkt = (PKT *)(buf + hdrlen);
584 697
585 if (pkt->type != ICMP4_ECHO_REPLY 698 if (pkt->type != ICMP4_ECHO_REPLY
586 || pkt->id != (uint16_t) magic 699 || pkt->pinger >= pingercnt
587 || pkt->seq != (uint16_t)~magic 700 || !pingers [pkt->pinger])
588 || !isnormal (pkt->stamp))
589 continue; 701 continue;
590 702
591 { 703 pinger = pingers [pkt->pinger];
592 AV *av = newAV ();
593 av_push (av, newSVpvn ((char *)&sa.sin_addr, 4));
594 av_push (av, newSVnv (now - pkt->stamp));
595 av_push (av, newSVuv (pkt->payload));
596 704
597 av_push (res_av, newRV_noinc ((SV *)av)); 705 if (!pkt_is_valid_for (pkt, pinger))
598 } 706 continue;
707
708 recv_feed (pinger, &sa.sin_addr, 4, NOW () - pkt_to_ts (pkt));
599 } 709 }
600 710
601 if (res_av) 711 recv_flush ();
602 feed_reply (res_av);
603} 712}
604 713
605void 714void
606_recv_icmp6 (...) 715_recv_icmp6 (...)
607 CODE: 716 CODE:
608{ 717{
609 struct sockaddr_in6 sa; 718 struct sockaddr_in6 sa;
610 socklen_t sl = sizeof (sa);
611 AV *res_av = av_len (cbs) < 0 ? 0 : (AV *)sv_2mortal ((SV *)newAV ());
612 PKT pkt; 719 PKT pkt;
613 tstamp now = NOW (); 720 int maxrecv;
614 721
615 for (;;) 722 for (maxrecv = 256+1; --maxrecv; )
616 { 723 {
724 PINGER *pinger;
725 socklen_t sl = sizeof (sa);
617 int len = recvfrom (icmp6_fd, &pkt, sizeof (pkt), MSG_TRUNC, (struct sockaddr *)&sa, &sl); 726 int len = recvfrom (icmp6_fd, &pkt, sizeof (pkt), MSG_TRUNC, (struct sockaddr *)&sa, &sl);
618 727
619 if (len != sizeof (PKT)) 728 if (len != sizeof (PKT))
620 break; 729 break;
621 730
622 if (!res_av
623 || pkt.type != ICMP6_ECHO_REPLY 731 if (pkt.type != ICMP6_ECHO_REPLY
624 || pkt.id != (uint16_t) magic 732 || pkt.pinger >= pingercnt
625 || pkt.seq != (uint16_t)~magic 733 || !pingers [pkt.pinger])
626 || !isnormal (pkt.stamp))
627 continue; 734 continue;
628 735
629 { 736 pinger = pingers [pkt.pinger];
630 AV *av = newAV ();
631 av_push (av, newSVpvn ((char *)&sa.sin6_addr, 16));
632 av_push (av, newSVnv (now - pkt.stamp));
633 av_push (av, newSVuv (pkt.payload));
634 737
635 av_push (res_av, newRV_noinc ((SV *)av)); 738 if (!pkt_is_valid_for (&pkt, pinger))
636 } 739 continue;
740
741 recv_feed (pinger, &sa.sin6_addr, 16, NOW () - pkt_to_ts (&pkt));
637 } 742 }
638 743
639 if (res_av) 744 recv_flush ();
640 feed_reply (res_av);
641} 745}
642 746
747void
748_new (SV *klass, UV magic1, UV magic2, UV magic3)
749 PPCODE:
750{
751 SV *pv = NEWSV (0, sizeof (PINGER));
752 PINGER *self = (PINGER *)SvPVX (pv);
753 SvPOK_only (pv);
754 XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), gv_stashpv (SvPVutf8_nolen (klass), 1))));
755 pinger_init (self);
756 self->magic1 = magic1;
757 self->magic2 = magic2;
758 self->magic3 = magic3;
759}
760
761void
762_free (PINGER *self)
763 CODE:
764 pinger_free (self);
765
766IV
767id (PINGER *self, ...)
768 CODE:
769 RETVAL = self->id;
770 OUTPUT:
771 RETVAL
772
773void pinger_start (PINGER *self)
774
775void pinger_stop (PINGER *self)
776
777void
778_stop_id (UV id)
779 CODE:
780 if (id < pingercnt && pingers [id])
781 pinger_stop (pingers [id]);
782
783void
784interval (PINGER *self, NV interval)
785 CODE:
786 self->interval = interval > MIN_INTERVAL ? interval : MIN_INTERVAL;
787
788void
789max_rtt (PINGER *self, NV maxrtt)
790 CODE:
791 self->maxrtt = maxrtt;
792
793void
794add_range (PINGER *self, SV *lo_, SV *hi_, NV interval)
795 CODE:
796{
797 STRLEN lo_len, hi_len;
798 char *lo = SvPVbyte (lo_, lo_len);
799 char *hi = SvPVbyte (hi_, hi_len);
800 RANGE *range;
801
802 if (lo_len != hi_len || (lo_len != 4 && lo_len != 16))
803 croak ("AnyEvent::FastPing::add_range address range must be specified as two binary IPv4 or IPv6 addresses");
804
805 if (lo_len == 4 && icmp4_fd < 0) croak ("IPv4 support unavailable");
806 if (lo_len == 16 && icmp6_fd < 0) croak ("IPv6 support unavailable");
807
808 if (memcmp (lo, hi, lo_len) > 0)
809 croak ("AnyEvent::FastPing::add_range called with lo > hi");
810
811 range = calloc (1, sizeof (RANGE));
812
813 range->next = 0;
814 range->interval = interval > MIN_INTERVAL ? interval : MIN_INTERVAL;
815 range->addrlen = lo_len;
816
817 memcpy (sizeof (addr_tt) - lo_len + (char *)&range->lo, lo, lo_len);
818 memcpy (sizeof (addr_tt) - lo_len + (char *)&range->hi, hi, lo_len);
819
820 pinger_add_range (self, range);
821}
822
823void
824add_hosts (PINGER *self, SV *addrs, NV interval)
825 CODE:
826{
827 AV *av;
828 int i;
829 int cnt;
830 int addrlen;
831 RANGE *range;
832
833 if (!SvROK (addrs) || SvTYPE (SvRV (addrs)) != SVt_PVAV)
834 croak ("AnyEvent::FastPing::add_hosst expects an arrayref with binary IPv4 or IPv6 addresses");
835
836 av = (AV *)SvRV (addrs);
837 cnt = av_len (av) + 1;
838
839 if (!cnt)
840 XSRETURN_EMPTY;
841
842 addrlen = SvCUR (*av_fetch (av, 0, 1));
843
844 if (addrlen != 4 && addrlen != 16)
845 croak ("AnyEvent::FastPing::add_hosts addresses must be specified as binary IPv4 or IPv6 addresses");
846
847 for (i = cnt; --i; )
848 {
849 SV *sv = *av_fetch (av, i, 1);
850
851 if (!sv_utf8_downgrade (sv, 1) || addrlen != SvCUR (sv))
852 croak ("AnyEvent::FastPing::add_hosts addresses must all have the same size");
853 }
854
855 range = calloc (1, sizeof (RANGE) + cnt * addrlen);
856
857 range->next = 0;
858 range->interval = interval > MIN_INTERVAL ? interval : MIN_INTERVAL;
859 range->addrlen = addrlen;
860 range->addrcnt = cnt;
861
862 for (i = cnt; i--; )
863 memcpy ((uint8_t *)(range + 1) + (cnt - 1 - i) * addrlen,
864 SvPVbyte_nolen (*av_fetch (av, i, 1)),
865 addrlen);
866
867 pinger_add_range (self, range);
868}
869
870void
871on_recv (PINGER *self, SV *cb)
872 CODE:
873 SvREFCNT_dec (self->recvcb);
874 self->recvcb = newSVsv (cb);
875

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