[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 1.12 by root, Wed Feb 2 19:26:45 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	static int thr_res[2]; // worker thread finished status
		50	static int icmp4_fd = -1;
		51	static int icmp6_fd = -1;
51		52
52	typedef uint8_t addr_tt[16];	53	/*****************************************************************************/
53		54
54	typedef double tstamp;	55	typedef double tstamp;
55		56
56	static tstamp	57	static tstamp
57	NOW (void)	58	NOW (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
64	typedef struct	67	static void
		68	ssleep (tstamp wait)
65	{	69	{
66	int family;	70	#if defined (__SVR4) && defined (__sun)
67	addr_tt lo, hi;	71	struct timeval tv;
68	double interval;
69	tstamp next;
70	} RANGE;
71		72
72	typedef struct	73	tv.tv_sec = wait;
73	{	74	tv.tv_usec = (wait - tv.tv_sec) * 1e6;
74	SV *id;	75
75	double interval;	76	select (0, 0, 0, 0, &tv);
76	int nranges;	77	#elif defined(_WIN32)
77	RANGE *ranges;	78	Sleep ((unsigned long)(delay * 1e3));
78	uint32_t payload;	79	#else
79	} REQ;	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	/*****************************************************************************/
80		90
81	typedef struct	91	typedef struct
82	{	92	{
83	uint8_t version_ihl;	93	uint8_t version_ihl;
84	uint8_t tos;	94	uint8_t tos;
…		…
93		103
94	uint32_t src;	104	uint32_t src;
95	uint32_t dst;	105	uint32_t dst;
96	} IP4HDR;	106	} IP4HDR;
97		107
		108	/*****************************************************************************/
		109
		110	typedef uint8_t addr_tt[16];
		111
98	typedef struct	112	typedef struct
99	{	113	{
100	uint8_t version;	114	tstamp next;
101	uint8_t x1, x2, x3;	115	tstamp interval;
		116	int addrlen;
102		117
103	uint16_t payload_len;	118	addr_tt lo, hi; /* only if !addrcnt */
104	uint8_t nxt_hdr;
105	uint8_t hop_limit;
106		119
107	uint8_t src[16];	120	int addrcnt;
108	uint8_t dst[16];	121	/* addrcnt addresses follow */
109	} IP6HDR;	122	} RANGE;
110		123
111	#define MAGIC 0xca4c	124	typedef struct
		125	{
		126	RANGE **ranges;
		127	int rangecnt, rangemax;
112		128
		129	tstamp next;
		130	tstamp interval;
		131
		132	tstamp maxrtt;
		133
113	static uint16_t magic;	134	uint16_t magic1;
		135	uint16_t magic2;
		136	uint16_t magic3;
		137
		138	int id;
		139
		140	AV recvq; / receive queue */
		141	int nextrecv;
		142	SV *recvcb;
		143
		144	pthread_t thrid;
		145	int running;
		146	} PINGER;
		147
		148	static PINGER **pingers;
		149	static int pingerfree; / freelist next */
		150	static int pingercnt;
		151	static int pingermax;
		152	static int firstfree = -1;
		153	static int firstrecv = -1;
		154
		155	/*****************************************************************************/
114		156
115	typedef struct	157	typedef struct
116	{	158	{
117	uint8_t type, code;	159	uint8_t type, code;
118	uint16_t cksum;	160	uint16_t cksum;
		161
119	uint16_t id, seq;	162	uint16_t id, seq;
		163
		164	uint16_t pinger;
		165	uint16_t magic;
		166
		167	uint32_t stamp_hi;
120	uint32_t payload;	168	uint32_t stamp_lo;
121	tstamp stamp; // be careful when accessing this
122	} PKT;	169	} PKT;
123		170
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	171	static int
133	icmp_cksum (void *data, unsigned int len)	172	pkt_is_valid_for (PKT pkt, PINGER pinger)
134	{	173	{
135	register int sum = 0;	174	return pkt->id == pinger->magic1
136	uint16_t *wp;	175	&& pkt->seq == pinger->magic2
		176	&& pkt->magic == pinger->magic3;
		177	}
137		178
138	assert (~len & 1);	179	static void
		180	ts_to_pkt (PKT *pkt, tstamp ts)
		181	{
		182	/* move 12 bits of seconds into the 32 bit fractional part */
		183	/* leaving 20 bits subsecond resolution and 44 bits of integers */
		184	/* (of which 32 are typically usable) */
		185	ts *= 1. / 4096.;
139		186
140	for (wp = (uint16_t *)data; len; wp++, len -= 2)	187	pkt->stamp_hi = ts;
141	sum += *wp;	188	pkt->stamp_lo = (ts - pkt->stamp_hi) * 4294967296.;
		189	}
		190
		191	static tstamp
		192	pkt_to_ts (PKT *pkt)
		193	{
		194	return pkt->stamp_hi * 4096.
		195	+ pkt->stamp_lo * (4096. / 4294967296.);
		196	}
		197
		198	static void
		199	pkt_cksum (PKT *pkt)
		200	{
		201	uint_fast32_t sum = -pkt->cksum;
		202	uint32_t wp = (uint32_t )pkt;
		203	int len = sizeof (*pkt) / 4;
		204
		205	do
		206	{
		207	uint_fast32_t w = (volatile uint32_t )wp++;
		208	sum += (w & 0xffff) + (w >> 16);
		209	}
		210	while (len--);
142		211
143	sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */	212	sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */
144	sum += sum >> 16; /* add carry */	213	sum += sum >> 16; /* add carry */
145		214
146	return ~sum;	215	pkt->cksum = ~sum;
147	}	216	}
148		217
		218	/*****************************************************************************/
		219
		220	static void
		221	range_free (RANGE *self)
		222	{
		223	free (self);
		224	}
		225
		226	/* like sendto, but retries on failure */
		227	static void
		228	xsendto (int fd, void buf, size_t len, int flags, void sa, int salen)
		229	{
		230	tstamp wait = DRAIN_INTERVAL / 2.;
		231
		232	while (sendto (fd, buf, len, flags, sa, salen) < 0 && errno == ENOBUFS)
		233	ssleep (wait *= 2.);
		234	}
		235
		236	// ping current address, return true and increment if more to ping
149	static void	237	static int
150	inc_addr (addr_tt *addr)	238	range_send_ping (RANGE self, PKT pkt)
151	{	239	{
		240	// send ping
		241	uint8_t *addr;
		242
		243	if (self->addrcnt)
		244	addr = (self->addrcnt - 1) * self->addrlen + (uint8_t *)(self + 1);
		245	else
		246	addr = sizeof (addr_tt) - self->addrlen + self->lo;
		247
		248	pkt->cksum = 0;
		249
		250	if (self->addrlen == 4)
		251	{
		252	struct sockaddr_in sa;
		253
		254	pkt->type = ICMP4_ECHO;
		255	pkt_cksum (pkt);
		256
		257	sa.sin_family = AF_INET;
		258	sa.sin_port = 0;
		259
		260	memcpy (&sa.sin_addr, addr, sizeof (sa.sin_addr));
		261
		262	xsendto (icmp4_fd, pkt, sizeof (*pkt), 0, &sa, sizeof (sa));
		263	}
		264	else
		265	{
		266	#if ENABLE_IPV6
		267	struct sockaddr_in6 sa;
		268
		269	pkt->type = ICMP6_ECHO;
		270
		271	sa.sin6_family = AF_INET6;
		272	sa.sin6_port = 0;
		273	sa.sin6_flowinfo = 0;
		274	sa.sin6_scope_id = 0;
		275
		276	memcpy (&sa.sin6_addr, addr, sizeof (sa.sin6_addr));
		277
		278	xsendto (icmp6_fd, pkt, sizeof (*pkt), 0, &sa, sizeof (sa));
		279	#endif
		280	}
		281
		282	// see if we have any more addresses
		283	if (self->addrcnt)
		284	{
		285	if (!--self->addrcnt)
		286	return 0;
		287	}
		288	else
		289	{
		290	if (!memcmp (&self->lo, &self->hi, sizeof (addr_tt)))
		291	return 0;
		292
		293	// increment self->lo
		294	{
152	int len = sizeof (addr_tt) - 1;	295	int len = sizeof (addr_tt) - 1;
		296
		297	while (!++self->lo [len])
		298	--len;
		299	}
		300	}
		301
		302	return 1;
		303	}
		304
		305	/*****************************************************************************/
		306
		307	static void
		308	downheap (PINGER *self)
		309	{
		310	RANGE elem = self->ranges [0]; / always exists */
		311	int Nm1 = self->rangecnt - 1;
		312	int j;
		313	int k;
		314
		315	for (k = 0; ; )
		316	{
		317	int j = k * 2 + 1;
		318
		319	if (j > Nm1)
		320	break;
		321
		322	if (j < Nm1
		323	&& self->ranges [j]->next > self->ranges [j + 1]->next)
		324	++j;
		325
		326	if (self->ranges [j]->next >= elem->next)
		327	break;
		328
		329	self->ranges [k] = self->ranges [j];
		330
		331	k = j;
		332	}
		333
		334	self->ranges [k] = elem;
		335	}
		336
		337	static void
		338	upheap (PINGER *self, int k)
		339	{
		340	RANGE *elem = self->ranges [k];
		341
		342	while (k)
		343	{
		344	int j = (k - 1) >> 1;
		345
		346	if (self->ranges [j]->next <= elem->next)
		347	break;
		348
		349	self->ranges [k] = self->ranges [j];
		350
		351	k = j;
		352	}
		353
		354	self->ranges [k] = elem;
		355	}
		356
		357	static void *
		358	ping_proc (void *self_)
		359	{
		360	PINGER self = (PINGER )self_;
		361	PKT pkt;
		362
		363	memset (&pkt, 0, sizeof (pkt));
		364
		365	tstamp now = NOW ();
		366
		367	pkt.code = 0;
		368	pkt.id = self->magic1;
		369	pkt.seq = self->magic2;
		370	pkt.magic = self->magic3;
		371	pkt.pinger = self->id;
		372
		373	if (self->next < now)
		374	self->next = now;
		375
		376	while (self->rangecnt)
		377	{
		378	RANGE *range = self->ranges [0];
		379
		380	// ranges [0] is always the next range to ping
		381	tstamp wait = range->next - now;
		382
		383	// compare with the global frequency limit
		384	{
		385	tstamp diff = self->next - now;
		386
		387	if (wait < diff)
		388	wait = diff; // global rate limit overrides
		389	else
		390	self->next = range->next; // fast forward
		391	}
		392
		393	if (wait > 0.)
		394	ssleep (wait);
		395
		396	now = NOW ();
		397
		398	ts_to_pkt (&pkt, now);
		399
		400	if (!range_send_ping (range, &pkt))
		401	{
		402	self->ranges [0] = self->ranges [--self->rangecnt];
		403	range_free (range);
		404	}
		405	else
		406	range->next = self->next + range->interval;
		407
		408	downheap (self);
		409
		410	self->next += self->interval;
		411	now = NOW ();
		412	}
		413
		414	ssleep (self->maxrtt);
		415
		416	{
		417	uint16_t id = self->id;
		418
		419	write (thr_res [1], &id, sizeof (id));
		420	}
		421
		422	return 0;
		423	}
		424
		425	/*****************************************************************************/
		426
		427	static void
		428	pinger_start (PINGER *self)
		429	{
		430	sigset_t fullsigset, oldsigset;
		431	pthread_attr_t attr;
		432
		433	if (self->running)
		434	return;
		435
		436	sigfillset (&fullsigset);
		437
		438	pthread_attr_init (&attr);
		439	pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 2048 ? sizeof (long) * 2048 : PTHREAD_STACK_MIN);
		440
		441	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
		442
		443	if (pthread_create (&self->thrid, &attr, ping_proc, (void *)self))
		444	croak ("AnyEvent::FastPing: unable to create pinger thread");
		445
		446	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
		447
		448	self->running = 1;
		449	}
		450
		451	static void
		452	pinger_stop (PINGER *self)
		453	{
		454	if (!self->running)
		455	return;
		456
		457	self->running = 0;
		458	pthread_cancel (self->thrid);
		459	pthread_join (self->thrid, 0);
		460	}
		461
		462	static void
		463	pinger_init (PINGER *self)
		464	{
		465	memset (self, 0, sizeof (PINGER));
		466
		467	if (firstfree >= 0)
		468	{
		469	self->id = firstfree;
		470	firstfree = pingerfree [firstfree];
		471	}
		472	else if (pingercnt == 0xffff)
		473	croak ("unable to create more than 65536 AnyEvent::FastPing objects");
		474	else
		475	{
		476	if (pingercnt == pingermax)
		477	{
		478	pingermax = pingermax * 2 + 16;
		479	pingers = realloc (pingers , sizeof (pingers [0]) * pingermax);
		480	pingerfree = realloc (pingerfree, sizeof (pingerfree [0]) * pingermax);
		481	}
		482
		483	self->id = pingercnt++;
		484	}
		485
		486	pingers [self->id] = self;
		487
		488	self->recvcb = &PL_sv_undef;
		489	self->next = 0.;
		490	self->interval = MIN_INTERVAL;
		491	self->maxrtt = 0.5;
		492	self->rangemax = 16;
		493	self->ranges = malloc (sizeof (self->ranges [0]) * self->rangemax);
		494	}
		495
		496	static void
		497	pinger_free (PINGER *self)
		498	{
		499	pinger_stop (self);
		500
		501	pingers [self->id] = 0;
		502
		503	SvREFCNT_dec (self->recvq);
		504	SvREFCNT_dec (self->recvcb);
		505
		506	pingerfree [self->id] = firstfree;
		507	firstfree = self->id;
		508
		509	while (self->rangecnt)
		510	range_free (self->ranges [--self->rangecnt]);
		511
		512	free (self->ranges);
		513	}
		514
		515	static void
		516	pinger_add_range (PINGER self, RANGE range)
		517	{
		518	if (self->rangecnt == self->rangemax)
		519	self->ranges = realloc (self->ranges, sizeof (self->ranges [0]) * (self->rangemax <<= 1));
		520
		521	self->ranges [self->rangecnt] = range;
		522	upheap (self, self->rangecnt);
		523	++self->rangecnt;
		524	}
		525
		526	/*****************************************************************************/
		527
		528	static void
		529	recv_feed (PINGER self, void addr, int addrlen, tstamp rtt)
		530	{
		531	if (!self->recvq)
		532	{
		533	/* first seen this round */
		534	if (!SvOK (self->recvcb))
		535	return;
		536
		537	self->recvq = newAV ();
		538
		539	self->nextrecv = firstrecv;
		540	firstrecv = self->id;
		541	}
		542
		543	{
		544	AV *pkt = newAV ();
		545
		546	av_extend (pkt, 2-1);
		547
		548	AvARRAY (pkt)[0] = newSVpvn (addr, addrlen);
		549	AvARRAY (pkt)[1] = newSVnv (rtt);
		550	AvFILLp (pkt) = 2-1;
		551
		552	av_push (self->recvq, newRV_noinc ((SV *)pkt));
		553	}
		554	}
		555
		556	static void
		557	recv_flush (void)
		558	{
		559	if (firstrecv < 0)
		560	return;
		561
		562	ENTER;
		563	SAVETMPS;
153		564
154	do	565	do
155	{	566	{
156	if ((*addr)[len] != 0xff)	567	dSP;
157	{	568	PINGER *self = pingers [firstrecv];
158	++(*addr)[len];	569	firstrecv = self->nextrecv;
159	break;
160	}
161		570
162	(*addr)[len] = 0;	571	self->nextrecv = -1;
163	}
164	while (len--);
165	}
166		572
167	static void *	573	PUSHMARK (SP);
168	ping_proc (void *unused)	574	XPUSHs (sv_2mortal (newRV_noinc ((SV *)self->recvq)));
169	{	575	self->recvq = 0;
170	PKT pkt;	576	PUTBACK;
171	struct sockaddr_in sa4;	577	call_sv (self->recvcb, G_DISCARD \| G_VOID);
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	{
199	perror ("AnyEvent::FastPing: short read or read error");
200	pthread_exit ((void *)-1);
201	}
202
203	//TODO: bind to source address
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	}	578	}
		579	while (firstrecv >= 0);
215		580
216	while (req->nranges)	581	FREETMPS;
217	{	582	LEAVE;
218	RANGE *range = req->ranges;
219	int n, k;
220
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	}
324
325	write (thr_recv [1], &req, sizeof (req));
326	}
327
328	return 0;
329	}	583	}
330		584
		585	/*****************************************************************************/
		586
		587	#if 0
331	static void	588	static void
332	feed_reply (AV *res_av)	589	feed_reply (AV *res_av)
333	{	590	{
334	dSP;	591	dSP;
335	SV res = sv_2mortal (newRV_inc ((SV )res_av));	592	SV res = sv_2mortal (newRV_inc ((SV )res_av));
…		…
352	}	609	}
353		610
354	FREETMPS;	611	FREETMPS;
355	LEAVE;	612	LEAVE;
356	}	613	}
		614	#endif
357		615
358	static void	616	static void
359	boot ()	617	boot ()
360	{	618	{
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)	619	if (pipe (thr_res) < 0)
368	croak ("AnyEvent::FastPing: unable to create receive pipe");	620	croak ("AnyEvent::FastPing: unable to create receive pipe");
		621
		622	sv_setiv (get_sv ("AnyEvent::FastPing::THR_RES_FD", 1), thr_res [0]);
369		623
370	icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);	624	icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);
371	fcntl (icmp4_fd, F_SETFL, O_NONBLOCK);	625	fcntl (icmp4_fd, F_SETFL, O_NONBLOCK);
372	#ifdef ICMP_FILTER	626	#ifdef ICMP_FILTER
373	{	627	{
…		…
388	setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval);	642	setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval);
389	}	643	}
390	# endif	644	# endif
391	#endif	645	#endif
392		646
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);	647	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd);
412	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd);	648	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd);
413	}	649	}
414		650
		651	#define NOT_RUNNING \
		652	if (self->running) \
		653	croak ("AnyEvent::FastPing object has been started - you have to sotp t first before calling this method, caught");
		654
415	MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing	655	MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing PREFIX = pinger_
416		656
417	BOOT:	657	BOOT:
418	{	658	{
419	HV *stash = gv_stashpv ("AnyEvent::FastPing", 1);	659	HV *stash = gv_stashpv ("AnyEvent::FastPing", 1);
420		660
421	cbs = get_av ("AnyEvent::FastPing::CB", 1);	661	if (sizeof (PKT) & 3)
422	magic = getpid () ^ MAGIC;	662	croak ("size of PKT structure is not a multiple of 4");
423		663
424	boot ();	664	boot ();
425		665
426	newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0));	666	newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0));
427	newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0));	667	newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0));
…		…
430	newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT)));	670	newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT)));
431	}	671	}
432		672
433	PROTOTYPES: DISABLE	673	PROTOTYPES: DISABLE
434		674
435	SV *
436	_req_icmp_ping (SV ranges, NV interval, U32 payload, SV id)
437	CODE:
438	{
439	AV *rav;
440	int nranges, i;
441	REQ *req;
442
443	if (!SvROK (ranges) \|\| SvTYPE (SvRV (ranges)) != SVt_PVAV)
444	croak ("address ranges must be given as arrayref with lo, hi pairs");
445
446	rav = (AV *)SvRV (ranges);
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:
540	RETVAL
541
542	SV *
543	_read_res ()
544	CODE:
545	{
546	REQ *req;
547
548	if (read (thr_recv [0], &req, sizeof (req)) != sizeof (req))
549	RETVAL = &PL_sv_undef;
550
551	RETVAL = req->id;
552	free (req->ranges);
553	free (req);
554	}
555	OUTPUT:
556	RETVAL
557
558	void	675	void
559	_recv_icmp4 (...)	676	_recv_icmp4 (...)
560	CODE:	677	CODE:
561	{	678	{
562	char buf [512];	679	char buf [512];
563	struct sockaddr_in sa;	680	struct sockaddr_in sa;
564	socklen_t sl = sizeof (sa);	681	int maxrecv;
565	AV res_av = av_len (cbs) < 0 ? 0 : (AV )sv_2mortal ((SV *)newAV ());
566	tstamp now = NOW ();
567		682
568	for (;;)	683	for (maxrecv = 256+1; --maxrecv; )
569	{	684	{
		685	PINGER *pinger;
570	IP4HDR iphdr = (IP4HDR )buf;	686	IP4HDR iphdr = (IP4HDR )buf;
		687	socklen_t sl = sizeof (sa);
571	int len = recvfrom (icmp4_fd, buf, sizeof (buf), MSG_TRUNC, (struct sockaddr *)&sa, &sl);	688	int len = recvfrom (icmp4_fd, buf, sizeof (buf), MSG_TRUNC, (struct sockaddr *)&sa, &sl);
572	int hdrlen, totlen;	689	int hdrlen, totlen;
573	PKT *pkt;	690	PKT *pkt;
574		691
575	if (len <= HDR_SIZE_IP4)	692	if (len <= HDR_SIZE_IP4)
576	break;	693	break;
577		694
578	hdrlen = (iphdr->version_ihl & 15) * 4;	695	hdrlen = (iphdr->version_ihl & 15) * 4;
579	totlen = ntohs (iphdr->tot_len);	696	totlen = ntohs (iphdr->tot_len);
580		697
581	// packet corrupt?
582	if (!res_av
583	\|\| totlen > len	698	if (totlen > len
584	\|\| iphdr->protocol != IPPROTO_ICMP	699	\|\| iphdr->protocol != IPPROTO_ICMP
585	\|\| hdrlen < HDR_SIZE_IP4 \|\| hdrlen + sizeof (PKT) != totlen)	700	\|\| hdrlen < HDR_SIZE_IP4 \|\| hdrlen + sizeof (PKT) != totlen)
586	continue;	701	continue;
587		702
588	pkt = (PKT *)(buf + hdrlen);	703	pkt = (PKT *)(buf + hdrlen);
589		704
590	if (pkt->type != ICMP4_ECHO_REPLY	705	if (pkt->type != ICMP4_ECHO_REPLY
591	\|\| pkt->id != (uint16_t) magic	706	\|\| pkt->pinger >= pingercnt
592	\|\| pkt->seq != (uint16_t)~magic	707	\|\| !pingers [pkt->pinger])
593	\|\| !isnormal (pkt->stamp))
594	continue;	708	continue;
595		709
596	{	710	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		711
602	av_push (res_av, newRV_noinc ((SV *)av));	712	if (!pkt_is_valid_for (pkt, pinger))
603	}	713	continue;
		714
		715	recv_feed (pinger, &sa.sin_addr, 4, NOW () - pkt_to_ts (pkt));
604	}	716	}
605		717
606	if (res_av)	718	recv_flush ();
607	feed_reply (res_av);
608	}	719	}
609		720
610	void	721	void
611	_recv_icmp6 (...)	722	_recv_icmp6 (...)
612	CODE:	723	CODE:
613	{	724	{
614	struct sockaddr_in6 sa;	725	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;	726	PKT pkt;
618	tstamp now = NOW ();	727	int maxrecv;
619		728
620	for (;;)	729	for (maxrecv = 256+1; --maxrecv; )
621	{	730	{
		731	PINGER *pinger;
		732	socklen_t sl = sizeof (sa);
622	int len = recvfrom (icmp6_fd, &pkt, sizeof (pkt), MSG_TRUNC, (struct sockaddr *)&sa, &sl);	733	int len = recvfrom (icmp6_fd, &pkt, sizeof (pkt), MSG_TRUNC, (struct sockaddr *)&sa, &sl);
623		734
624	if (len != sizeof (PKT))	735	if (len != sizeof (PKT))
625	break;	736	break;
626		737
627	if (!res_av
628	\|\| pkt.type != ICMP6_ECHO_REPLY	738	if (pkt.type != ICMP6_ECHO_REPLY
629	\|\| pkt.id != (uint16_t) magic	739	\|\| pkt.pinger >= pingercnt
630	\|\| pkt.seq != (uint16_t)~magic	740	\|\| !pingers [pkt.pinger])
631	\|\| !isnormal (pkt.stamp))
632	continue;	741	continue;
633		742
634	{	743	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		744
640	av_push (res_av, newRV_noinc ((SV *)av));	745	if (!pkt_is_valid_for (&pkt, pinger))
641	}	746	continue;
		747
		748	recv_feed (pinger, &sa.sin6_addr, 16, NOW () - pkt_to_ts (&pkt));
642	}	749	}
643		750
644	if (res_av)	751	recv_flush ();
645	feed_reply (res_av);
646	}	752	}
647		753
		754	void
		755	_new (SV *klass, UV magic1, UV magic2, UV magic3)
		756	PPCODE:
		757	{
		758	SV *pv = NEWSV (0, sizeof (PINGER));
		759	PINGER self = (PINGER )SvPVX (pv);
		760
		761	SvPOK_only (pv);
		762	XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), gv_stashpv (SvPVutf8_nolen (klass), 1))));
		763	pinger_init (self);
		764	self->magic1 = magic1;
		765	self->magic2 = magic2;
		766	self->magic3 = magic3;
		767	}
		768
		769	void
		770	_free (PINGER *self)
		771	CODE:
		772	pinger_free (self);
		773
		774	IV
		775	id (PINGER *self, ...)
		776	CODE:
		777	RETVAL = self->id;
		778	OUTPUT:
		779	RETVAL
		780
		781	void pinger_start (PINGER *self)
		782
		783	void pinger_stop (PINGER *self)
		784
		785	void
		786	_stop_id (UV id)
		787	CODE:
		788	if (id < pingercnt && pingers [id])
		789	pinger_stop (pingers [id]);
		790
		791	void
		792	interval (PINGER *self, NV interval)
		793	CODE:
		794	NOT_RUNNING;
		795	self->interval = interval > MIN_INTERVAL ? interval : MIN_INTERVAL;
		796
		797	void
		798	max_rtt (PINGER *self, NV maxrtt)
		799	CODE:
		800	NOT_RUNNING;
		801	self->maxrtt = maxrtt;
		802
		803	void
		804	on_recv (PINGER self, SV cb)
		805	CODE:
		806	SvREFCNT_dec (self->recvcb);
		807	self->recvcb = newSVsv (cb);
		808
		809	void
		810	add_range (PINGER self, SV lo_, SV *hi_, NV interval = 0)
		811	CODE:
		812	{
		813	STRLEN lo_len, hi_len;
		814	char *lo = SvPVbyte (lo_, lo_len);
		815	char *hi = SvPVbyte (hi_, hi_len);
		816	RANGE *range;
		817	NOT_RUNNING;
		818
		819	if (lo_len != hi_len \|\| (lo_len != 4 && lo_len != 16))
		820	croak ("AnyEvent::FastPing::add_range address range must be specified as two binary IPv4 or IPv6 addresses");
		821
		822	if (lo_len == 4 && icmp4_fd < 0) croak ("IPv4 support unavailable");
		823	if (lo_len == 16 && icmp6_fd < 0) croak ("IPv6 support unavailable");
		824
		825	if (memcmp (lo, hi, lo_len) > 0)
		826	croak ("AnyEvent::FastPing::add_range called with lo > hi");
		827
		828	range = calloc (1, sizeof (RANGE));
		829
		830	range->next = 0;
		831	range->interval = interval > MIN_INTERVAL ? interval : MIN_INTERVAL;
		832	range->addrlen = lo_len;
		833
		834	memcpy (sizeof (addr_tt) - lo_len + (char *)&range->lo, lo, lo_len);
		835	memcpy (sizeof (addr_tt) - lo_len + (char *)&range->hi, hi, lo_len);
		836
		837	pinger_add_range (self, range);
		838	}
		839
		840	void
		841	add_hosts (PINGER self, SV addrs, NV interval = 0, UV interleave = 1)
		842	CODE:
		843	{
		844	AV *av;
		845	int i, j, k;
		846	int cnt;
		847	int addrlen;
		848	RANGE *range;
		849	NOT_RUNNING;
		850
		851	if (!SvROK (addrs) \|\| SvTYPE (SvRV (addrs)) != SVt_PVAV)
		852	croak ("AnyEvent::FastPing::add_hosts expects an arrayref with binary IPv4 or IPv6 addresses");
		853
		854	av = (AV *)SvRV (addrs);
		855	cnt = av_len (av) + 1;
		856
		857	if (!cnt)
		858	XSRETURN_EMPTY;
		859
		860	addrlen = SvCUR (*av_fetch (av, 0, 1));
		861
		862	if (addrlen != 4 && addrlen != 16)
		863	croak ("AnyEvent::FastPing::add_hosts addresses must be specified as binary IPv4 or IPv6 addresses");
		864
		865	for (i = cnt; --i; )
		866	{
		867	SV sv = av_fetch (av, i, 1);
		868
		869	if (!sv_utf8_downgrade (sv, 1) \|\| addrlen != SvCUR (sv))
		870	croak ("AnyEvent::FastPing::add_hosts addresses must all have the same size");
		871	}
		872
		873	range = calloc (1, sizeof (RANGE) + cnt * addrlen);
		874
		875	range->next = 0;
		876	range->interval = interval > MIN_INTERVAL ? interval : MIN_INTERVAL;
		877	range->addrlen = addrlen;
		878	range->addrcnt = cnt;
		879
		880	if (interleave == 0)
		881	interleave = cnt <= 256 * 256 ? 256 : (int)sqrtf (cnt);
		882
		883	k = cnt;
		884	for (j = 0; j < interleave; ++j)
		885	for (i = j; i < cnt; i += interleave)
		886	memcpy ((uint8_t )(range + 1) + --k addrlen,
		887	SvPVbyte_nolen (*av_fetch (av, i, 1)),
		888	addrlen);
		889
		890	pinger_add_range (self, range);
		891	}
		892

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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 1.12 by root, Wed Feb 2 19:26:45 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 1.12 by root, Wed Feb 2 19:26:45 2011 UTC