[ViewVC] Diff of: cvs/AnyEvent-FastPing/FastPing.xs

Comparing AnyEvent-FastPing/FastPing.xs (file contents):
Revision 1.8 by root, Sat Jan 29 23:36:49 2011 UTC vs.
Revision 1.10 by root, Mon Jan 31 05:35:48 2011 UTC

…		…
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>
…		…
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	49	//TODO: xread/xwrite for atomicity? we currently rely on the fact that the pip buffersize divides exactly by pointer sizes
51		50
52	typedef uint8_t addr_tt[16];	51	typedef uint8_t addr_tt[16];
53		52
		53	static int thr_res[2]; // receive from worker(s)
		54	static int icmp4_fd = -1, icmp6_fd = -1;
		55
		56	/*****************************************************************************/
		57
54	typedef double tstamp;	58	typedef double tstamp;
55		59
56	static tstamp	60	static tstamp
57	NOW (void)	61	NOW (void)
58	{	62	{
59	struct timeval tv;	63	struct timeval tv;
		64
60	gettimeofday (&tv, 0);	65	gettimeofday (&tv, 0);
		66
61	return tv.tv_sec + tv.tv_usec * 0.000001;	67	return tv.tv_sec + tv.tv_usec * 1e-6;
62	}	68	}
63		69
64	typedef struct	70	static void
		71	ssleep (tstamp wait)
65	{	72	{
66	int family;	73	#if defined (__SVR4) && defined (__sun)
67	addr_tt lo, hi;	74	struct timeval tv;
68	double interval;
69	tstamp next;
70	} RANGE;
71		75
72	typedef struct	76	tv.tv_sec = wait;
73	{	77	tv.tv_usec = (wait - tv.tv_sec) * 1e6;
74	SV *id;	78
75	double interval;	79	select (0, 0, 0, 0, &tv);
76	int nranges;	80	#elif defined(_WIN32)
77	RANGE *ranges;	81	Sleep ((unsigned long)(delay * 1e3));
78	uint32_t payload;	82	#else
79	} REQ;	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	/*****************************************************************************/
80		93
81	typedef struct	94	typedef struct
82	{	95	{
83	uint8_t version_ihl;	96	uint8_t version_ihl;
84	uint8_t tos;	97	uint8_t tos;
…		…
93		106
94	uint32_t src;	107	uint32_t src;
95	uint32_t dst;	108	uint32_t dst;
96	} IP4HDR;	109	} IP4HDR;
97		110
		111	#if 0
98	typedef struct	112	typedef struct
99	{	113	{
100	uint8_t version;	114	uint8_t version;
101	uint8_t x1, x2, x3;	115	uint8_t x1, x2, x3;
102		116
…		…
105	uint8_t hop_limit;	119	uint8_t hop_limit;
106		120
107	uint8_t src[16];	121	uint8_t src[16];
108	uint8_t dst[16];	122	uint8_t dst[16];
109	} IP6HDR;	123	} IP6HDR;
		124	#endif
110		125
111	#define MAGIC 0xca4c	126	/*****************************************************************************/
112		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;
113	static uint16_t magic;	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	/*****************************************************************************/
114		166
115	typedef struct	167	typedef struct
116	{	168	{
117	uint8_t type, code;	169	uint8_t type, code;
118	uint16_t cksum;	170	uint16_t cksum;
119	uint16_t id, seq;	171	uint16_t id, seq;
		172	uint16_t pinger;
		173	uint16_t magic;
		174	uint32_t stamp_hi;
120	uint32_t payload;	175	uint32_t stamp_lo;
121	tstamp stamp; // be careful when accessing this
122	} PKT;	176	} PKT;
123		177
124	static pthread_t pthrid;
125	static int thr_send[2]; // send to worker
126	static int thr_recv[2]; // receive from worker
127
128	static int icmp4_fd, icmp6_fd;
129
130	static AV *cbs;
131
132	static uint16_t	178	static int
133	icmp_cksum (void *data, unsigned int len)	179	pkt_is_valid_for (PKT pkt, PINGER pinger)
134	{	180	{
135	register int sum = 0;	181	return pkt->id == pinger->magic1
136	uint16_t *wp;	182	&& pkt->seq == pinger->magic2
		183	&& pkt->magic == pinger->magic3;
		184	}
137		185
138	assert (~len & 1);	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.;
139		193
140	for (wp = (uint16_t *)data; len; wp++, len -= 2)	194	pkt->stamp_hi = ts;
141	sum += *wp;	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--);
142		218
143	sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */	219	sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */
144	sum += sum >> 16; /* add carry */	220	sum += sum >> 16; /* add carry */
145		221
146	return ~sum;	222	pkt->cksum = ~sum;
		223	}
		224
		225	/*****************************************************************************/
		226
		227	static void
		228	range_free (RANGE *self)
		229	{
		230	free (self);
147	}	231	}
148		232
149	static void	233	static void
150	inc_addr (addr_tt *addr)	234	inc_addr (addr_tt *addr)
151	{	235	{
152	int len = sizeof (addr_tt) - 1;	236	int len = sizeof (addr_tt) - 1;
153		237
154	do	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
155	{	372	{
156	if ((*addr)[len] != 0xff)	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)))
157	{	391	{
158	++(*addr)[len];	392	self->ranges [0] = self->ranges [--self->rangecnt];
159	break;	393	range_free (range);
160	}	394	}
161		395	else
162	(*addr)[len] = 0;
163	}
164	while (len--);
165	}
166
167	static void *
168	ping_proc (void *unused)
169	{
170	PKT pkt;
171	struct sockaddr_in sa4;
172	#if ENABLE_IPV6
173	struct sockaddr_in6 sa6;
174	#endif
175
176	memset (&pkt, 0, sizeof (pkt));
177
178	memset (&sa4, 0, sizeof (sa4));
179	sa4.sin_family = AF_INET;
180	sa4.sin_port = 0;
181	#if ENABLE_IPV6
182	memset (&sa6, 0, sizeof (sa6));
183	sa6.sin6_family = AF_INET6;
184	sa6.sin6_port = 0;
185	#endif
186
187	for (;;)
188	{
189	REQ *req;
190	int len = read (thr_send [0], &req, sizeof (req));
191
192	tstamp now = NOW ();
193	tstamp next = now;
194
195	if (!len)
196	pthread_exit (0);
197	else if (len != sizeof (req))
198	{	396	{
199	perror ("AnyEvent::FastPing: short read or read error");	397	inc_addr (&range->lo);
200	pthread_exit ((void *)-1);	398
		399	range->next = next;
		400	range->next += range->interval;
		401
		402	downheap (self);
201	}	403	}
202		404
203	//TODO: bind to source address	405	next += self->interval;
204
205	pkt.code = 0;
206	pkt.id = (uint16_t)magic;
207	pkt.seq = (uint16_t)~magic;
208	pkt.payload = req->payload;
209
210	{
211	int r;
212	for (r = req->nranges; r--; )
213	inc_addr (&req->ranges [r].hi);
214	}	406	}
215		407
216	while (req->nranges)	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)
217	{	471	{
218	RANGE *range = req->ranges;	472	pingermax = pingermax * 2 + 16;
219	int n, k;	473	pingers = realloc (pingers , sizeof (pingers [0]) * pingermax);
220		474	pingerfree = realloc (pingerfree, sizeof (pingerfree [0]) * pingermax);
221	if (!memcmp (&range->lo, &range->hi, sizeof (addr_tt)))
222	req->ranges [0] = req->ranges [--req->nranges];
223	else
224	{
225	// ranges [0] is always the next range to ping
226	tstamp wait = range->next - now;
227
228	// compare with the global frequency limit
229	{
230	tstamp diff = next - now;
231
232	if (wait < diff)
233	wait = diff;
234	else if (range)
235	next = range->next;
236	}
237
238	if (wait > 0.)
239	{
240	struct timespec ts;
241
242	ts.tv_sec = wait;
243	ts.tv_nsec = (wait - ts.tv_sec) * 1000000000.;
244
245	nanosleep (&ts, 0);
246	}
247
248	now = NOW ();
249
250	pkt.stamp = now;
251	pkt.cksum = 0;
252
253	if (range->family == AF_INET)
254	{
255	pkt.type = ICMP4_ECHO;
256	pkt.cksum = icmp_cksum (&pkt, sizeof (pkt));
257
258	memcpy (&sa4.sin_addr,
259	sizeof (addr_tt) - sizeof (sa4.sin_addr) + (char *)&range->lo,
260	sizeof (sa4.sin_addr));
261
262	if (sendto (icmp4_fd, &pkt, sizeof (pkt), 0, (struct sockaddr *)&sa4, sizeof (sa4)) > 0)
263	errno = 0;
264	}
265	else
266	{
267	#if ENABLE_IPV6
268	pkt.type = ICMP6_ECHO;
269
270	memcpy (&sa6.sin6_addr,
271	sizeof (addr_tt) - sizeof (sa6.sin6_addr) + (char *)&range->lo,
272	sizeof (sa6.sin6_addr));
273
274	if (sendto (icmp6_fd, &pkt, sizeof (pkt), 0, (struct sockaddr *)&sa6, sizeof (sa6)) > 0)
275	errno = 0;
276	#endif
277	}
278
279	if (errno == ENOBUFS)
280	{
281	struct timespec ts;
282
283	ts.tv_sec = 0;
284	ts.tv_nsec = DRAIN_INTERVAL * 1000000000;
285
286	nanosleep (&ts, 0);
287	}
288	else
289	{
290	inc_addr (&range->lo);
291
292	range->next = next;
293	range->next += range->interval;
294	}
295
296	next += req->interval;
297	}
298
299	// make a downheap operation
300	for (n = k = 0; ; )
301	{
302	int j = k * 2 + 1;
303
304	++n;
305
306	if (j >= req->nranges)
307	break;
308	else if (j < req->nranges - 1)
309	if (req->ranges [j].next > req->ranges [j + 1].next)
310	++j;
311
312	if (req->ranges [j].next >= req->ranges [k].next)
313	break;
314
315	{
316	RANGE temp = req->ranges [k];
317	req->ranges [k] = req->ranges [j];
318	req->ranges [j] = temp;
319	}
320
321	k = j;
322	}
323	}	475	}
324		476
325	write (thr_recv [1], &req, sizeof (req));	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)
326	}	514	{
		515	/* first seen this round */
		516	if (!SvOK (self->recvcb))
		517	return;
327		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)
328	return 0;	542	return;
329	}
330		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
331	static void	569	static void
332	feed_reply (AV *res_av)	570	feed_reply (AV *res_av)
333	{	571	{
334	dSP;	572	dSP;
335	SV res = sv_2mortal (newRV_inc ((SV )res_av));	573	SV res = sv_2mortal (newRV_inc ((SV )res_av));
…		…
352	}	590	}
353		591
354	FREETMPS;	592	FREETMPS;
355	LEAVE;	593	LEAVE;
356	}	594	}
		595	#endif
357		596
358	static void	597	static void
359	boot ()	598	boot ()
360	{	599	{
361	sigset_t fullsigset, oldsigset;
362	pthread_attr_t attr;
363
364	if (pipe (thr_send) < 0)
365	croak ("AnyEvent::FastPing: unable to create send pipe");
366
367	if (pipe (thr_recv) < 0)	600	if (pipe (thr_res) < 0)
368	croak ("AnyEvent::FastPing: unable to create receive pipe");	601	croak ("AnyEvent::FastPing: unable to create receive pipe");
		602
		603	sv_setiv (get_sv ("AnyEvent::FastPing::THR_RES_FD", 1), thr_res [0]);
369		604
370	icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);	605	icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);
371	fcntl (icmp4_fd, F_SETFL, O_NONBLOCK);	606	fcntl (icmp4_fd, F_SETFL, O_NONBLOCK);
372	#ifdef ICMP_FILTER	607	#ifdef ICMP_FILTER
373	{	608	{
…		…
388	setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval);	623	setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval);
389	}	624	}
390	# endif	625	# endif
391	#endif	626	#endif
392		627
393	pthread_attr_init (&attr);
394	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
395	#ifdef PTHREAD_SCOPE_PROCESS
396	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
397	#endif
398
399	sigfillset (&fullsigset);
400
401	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
402
403	if (pthread_create (&pthrid, &attr, ping_proc, 0))
404	croak ("AnyEvent::FastPing: unable to create pinger thread");
405
406	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
407
408	sv_setiv (get_sv ("AnyEvent::FastPing::THR_REQ_FD", 1), thr_send [1]);
409	sv_setiv (get_sv ("AnyEvent::FastPing::THR_RES_FD", 1), thr_recv [0]);
410
411	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd);	628	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd);
412	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd);	629	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd);
413	}	630	}
414		631
415	MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing	632	MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing PREFIX = pinger_
416		633
417	BOOT:	634	BOOT:
418	{	635	{
419	HV *stash = gv_stashpv ("AnyEvent::FastPing", 1);	636	HV *stash = gv_stashpv ("AnyEvent::FastPing", 1);
420		637
421	cbs = get_av ("AnyEvent::FastPing::CB", 1);	638	if (sizeof (PKT) & 3)
422	magic = getpid () ^ MAGIC;	639	croak ("size of PKT structure is not a multiple of 4");
423		640
424	boot ();	641	boot ();
425		642
426	newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0));	643	newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0));
427	newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0));	644	newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0));
…		…
430	newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT)));	647	newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT)));
431	}	648	}
432		649
433	PROTOTYPES: DISABLE	650	PROTOTYPES: DISABLE
434		651
435	SV *	652	void
436	_req_icmp_ping (SV ranges, NV interval, U32 payload, SV id)	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)
437	CODE:	668	CODE:
438	{	669	pinger_free (self);
439	AV *rav;
440	int nranges, i;
441	REQ *req;
442		670
443	if (!SvROK (ranges) \|\| SvTYPE (SvRV (ranges)) != SVt_PVAV)	671	IV
444	croak ("address ranges must be given as arrayref with lo, hi pairs");	672	id (PINGER *self, ...)
445		673	CODE:
446	rav = (AV *)SvRV (ranges);	674	RETVAL = self->id;
447	nranges = av_len (rav) + 1;
448
449	req = malloc (sizeof (REQ));
450
451	if (interval < MIN_INTERVAL)
452	interval = MIN_INTERVAL;
453
454	req->id = newSVsv (id);
455	req->interval = interval;
456	req->payload = payload;
457	req->nranges = nranges;
458	req->ranges = (RANGE )malloc (nranges sizeof (RANGE));
459
460	while (nranges--)
461	{
462	SV sv = av_fetch (rav, nranges, 1);
463	SV lo, hi;
464	AV *av;
465	RANGE *r;
466
467	if (!SvROK (sv) \|\| SvTYPE (SvRV (sv)) != SVt_PVAV)
468	croak ("address range must be given as arrayref with lo, hi, interval arrayrefs");
469
470	av = (AV *)SvRV (sv);
471	r = req->ranges + nranges;
472
473	lo = *av_fetch (av, 0, 1);
474	hi = *av_fetch (av, 1, 1);
475
476	sv_utf8_downgrade (lo, 0);
477	sv_utf8_downgrade (hi, 0);
478
479	memset (&r->lo, 0, sizeof (addr_tt));
480	memset (&r->hi, 0, sizeof (addr_tt));
481
482	if (SvPOKp (lo) && SvPOKp (hi))
483	{
484	if (SvCUR (lo) != SvCUR (hi))
485	croak ("all addresses in range must be of the same size (either 4 or 16 bytes)");
486
487	if (SvCUR (lo) == 4)
488	{
489	r->family = AF_INET;
490	memcpy (sizeof (addr_tt) - 4 + (char *)&r->lo, SvPVX (lo), 4);
491	memcpy (sizeof (addr_tt) - 4 + (char *)&r->hi, SvPVX (hi), 4);
492	}
493	else if (SvCUR (lo) == 16)
494	{
495	#if ENABLE_IPV6
496	r->family = AF_INET6;
497	memcpy (&r->lo, SvPVX (lo), sizeof (addr_tt));
498	memcpy (&r->hi, SvPVX (hi), sizeof (addr_tt));
499	#else
500	croak ("IPv6 not supported in this configuration");
501	#endif
502	}
503	else
504	croak ("addresses in range must be either 4 (IPv4) or 16 (IPv6) bytes in length");
505	}
506	else if (SvIOK (lo) && SvIOK (hi))
507	{
508	uint32_t addr;
509
510	r->family = AF_INET;
511
512	addr = htonl (SvUV (lo)); memcpy (sizeof (addr_tt) - 4 + (char *)&r->lo, &addr, 4);
513	addr = htonl (SvUV (hi)); memcpy (sizeof (addr_tt) - 4 + (char *)&r->hi, &addr, 4);
514	}
515	else
516	croak ("addresses in range must be strings with either 4 (IPv4) or 16 (IPv6) octets");
517
518	if (r->family == AF_INET)
519	{
520	if (icmp4_fd < 0)
521	croak ("AnyEvent::FastPing: IPv4 ping support not available on this system");
522	}
523	else
524	{
525	if (icmp6_fd < 0)
526	croak ("AnyEvent::FastPing: IPv6 ping support not available on this system");
527	}
528
529	r->interval = SvNV (*av_fetch (av, 2, 1));
530
531	if (r->interval < req->interval)
532	r->interval = req->interval;
533
534	r->next = 0.;
535	}
536
537	RETVAL = newSVpvn ((char *)&req, sizeof (req));
538	}
539	OUTPUT:	675	OUTPUT:
540	RETVAL	676	RETVAL
541		677
542	SV *	678	void pinger_start (PINGER *self)
543	_read_res ()	679
		680	void pinger_stop (PINGER *self)
		681
		682	void _stop_id (UV id)
544	CODE:	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:
545	{	693	{
		694	STRLEN lo_len, hi_len;
		695	char *lo = SvPVbyte (lo_, lo_len);
		696	char *hi = SvPVbyte (hi_, hi_len);
546	REQ *req;	697	RANGE *range;
547		698
548	if (read (thr_recv [0], &req, sizeof (req)) != sizeof (req))	699	if (lo_len != hi_len \|\| (lo_len != 4 && lo_len != 16))
549	RETVAL = &PL_sv_undef;	700	croak ("AnyEvent::FastPing::add_range address range must be specified as two binary IPv4 or IPv6 addresses");
550		701
551	RETVAL = req->id;	702	if (lo_len == 4 && icmp4_fd < 0) croak ("IPv4 support unavailable");
552	free (req->ranges);	703	if (lo_len == 16 && icmp6_fd < 0) croak ("IPv6 support unavailable");
553	free (req);	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;
554	}	720	}
555	OUTPUT:	721
556	RETVAL	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;
557		732
558	void	733	void
559	_recv_icmp4 (...)	734	_recv_icmp4 (...)
560	CODE:	735	CODE:
561	{	736	{
562	char buf [512];	737	char buf [512];
563	struct sockaddr_in sa;	738	struct sockaddr_in sa;
564	socklen_t sl = sizeof (sa);
565	AV res_av = av_len (cbs) < 0 ? 0 : (AV )sv_2mortal ((SV *)newAV ());
566	tstamp now = NOW ();
567		739
568	for (;;)	740	for (;;)
569	{	741	{
		742	PINGER *pinger;
570	IP4HDR iphdr = (IP4HDR )buf;	743	IP4HDR iphdr = (IP4HDR )buf;
		744	socklen_t sl = sizeof (sa);
571	int len = recvfrom (icmp4_fd, buf, sizeof (buf), MSG_TRUNC, (struct sockaddr *)&sa, &sl);	745	int len = recvfrom (icmp4_fd, buf, sizeof (buf), MSG_TRUNC, (struct sockaddr *)&sa, &sl);
572	int hdrlen, totlen;	746	int hdrlen, totlen;
573	PKT *pkt;	747	PKT *pkt;
574		748
575	if (len <= HDR_SIZE_IP4)	749	if (len <= HDR_SIZE_IP4)
…		…
577		751
578	hdrlen = (iphdr->version_ihl & 15) * 4;	752	hdrlen = (iphdr->version_ihl & 15) * 4;
579	totlen = ntohs (iphdr->tot_len);	753	totlen = ntohs (iphdr->tot_len);
580		754
581	// packet corrupt?	755	// packet corrupt?
582	if (!res_av
583	\|\| totlen > len	756	if (totlen > len
584	\|\| iphdr->protocol != IPPROTO_ICMP	757	\|\| iphdr->protocol != IPPROTO_ICMP
585	\|\| hdrlen < HDR_SIZE_IP4 \|\| hdrlen + sizeof (PKT) != totlen)	758	\|\| hdrlen < HDR_SIZE_IP4 \|\| hdrlen + sizeof (PKT) != totlen)
586	continue;	759	continue;
587		760
588	pkt = (PKT *)(buf + hdrlen);	761	pkt = (PKT *)(buf + hdrlen);
589		762
590	if (pkt->type != ICMP4_ECHO_REPLY	763	if (pkt->type != ICMP4_ECHO_REPLY
591	\|\| pkt->id != (uint16_t) magic	764	\|\| pkt->pinger >= pingercnt
592	\|\| pkt->seq != (uint16_t)~magic	765	\|\| !pingers [pkt->pinger])
593	\|\| !isnormal (pkt->stamp))
594	continue;	766	continue;
595		767
596	{	768	pinger = pingers [pkt->pinger];
597	AV *av = newAV ();
598	av_push (av, newSVpvn ((char *)&sa.sin_addr, 4));
599	av_push (av, newSVnv (now - pkt->stamp));
600	av_push (av, newSVuv (pkt->payload));
601		769
602	av_push (res_av, newRV_noinc ((SV *)av));	770	if (!pkt_is_valid_for (pkt, pinger))
603	}	771	continue;
		772
		773	recv_feed (pinger, &sa.sin_addr, 4, NOW () - pkt_to_ts (pkt));
604	}	774	}
605		775
606	if (res_av)	776	recv_flush ();
607	feed_reply (res_av);
608	}	777	}
609		778
610	void	779	void
611	_recv_icmp6 (...)	780	_recv_icmp6 (...)
612	CODE:	781	CODE:
613	{	782	{
614	struct sockaddr_in6 sa;	783	struct sockaddr_in6 sa;
615	socklen_t sl = sizeof (sa);
616	AV res_av = av_len (cbs) < 0 ? 0 : (AV )sv_2mortal ((SV *)newAV ());
617	PKT pkt;	784	PKT pkt;
618	tstamp now = NOW ();
619		785
620	for (;;)	786	for (;;)
621	{	787	{
		788	PINGER *pinger;
		789	socklen_t sl = sizeof (sa);
622	int len = recvfrom (icmp6_fd, &pkt, sizeof (pkt), MSG_TRUNC, (struct sockaddr *)&sa, &sl);	790	int len = recvfrom (icmp6_fd, &pkt, sizeof (pkt), MSG_TRUNC, (struct sockaddr *)&sa, &sl);
623		791
624	if (len != sizeof (PKT))	792	if (len != sizeof (PKT))
625	break;	793	break;
626		794
627	if (!res_av
628	\|\| pkt.type != ICMP6_ECHO_REPLY	795	if (pkt.type != ICMP6_ECHO_REPLY
629	\|\| pkt.id != (uint16_t) magic	796	\|\| pkt.pinger >= pingercnt
630	\|\| pkt.seq != (uint16_t)~magic	797	\|\| !pingers [pkt.pinger])
631	\|\| !isnormal (pkt.stamp))
632	continue;	798	continue;
633		799
634	{	800	pinger = pingers [pkt.pinger];
635	AV *av = newAV ();
636	av_push (av, newSVpvn ((char *)&sa.sin6_addr, 16));
637	av_push (av, newSVnv (now - pkt.stamp));
638	av_push (av, newSVuv (pkt.payload));
639		801
640	av_push (res_av, newRV_noinc ((SV *)av));	802	if (!pkt_is_valid_for (&pkt, pinger))
641	}	803	continue;
		804
		805	recv_feed (pinger, &sa.sin6_addr, 16, NOW () - pkt_to_ts (&pkt));
642	}	806	}
643		807
644	if (res_av)	808	recv_flush ();
645	feed_reply (res_av);
646	}	809	}
647		810

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Comparing AnyEvent-FastPing/FastPing.xs (file contents): Revision 1.8 by root, Sat Jan 29 23:36:49 2011 UTC vs. Revision 1.10 by root, Mon Jan 31 05:35:48 2011 UTC

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Comparing AnyEvent-FastPing/FastPing.xs (file contents):
Revision 1.8 by root, Sat Jan 29 23:36:49 2011 UTC vs.
Revision 1.10 by root, Mon Jan 31 05:35:48 2011 UTC