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

Comparing AnyEvent-FastPing/FastPing.xs (file contents):
Revision 1.2 by root, Sat May 17 21:47:29 2008 UTC vs.
Revision 1.12 by root, Wed Feb 2 19:26:45 2011 UTC

…		…
1	#define _POSIX_C_SOURCE 200112	1	#if defined(__linux) \|\| defined(__FreeBSD__) \|\| defined(__OpenBSD__) \|\| defined(__NetBSD__) \|\| defined(__CYGWIN__)
2	#define _XOPEN_SOURCE 600	2	# define ENABLE_IPV6 1 // if you get compilation problems try to disable IPv6
3	#define _LARGEFILE64_SOURCE 1
4
5	#ifndef __APPLE__
6	# define IPV6 0
7	#else	3	#else
8	# define IPV6 1 // if you get compilation problems try to disable IPv6	4	# define ENABLE_IPV6 0
9	#endif	5	#endif
10		6
11	#include "EXTERN.h"	7	#include "EXTERN.h"
12	#include "perl.h"	8	#include "perl.h"
13	#include "XSUB.h"	9	#include "XSUB.h"
14		10
15	#include <pthread.h>	11	#include <pthread.h>
16		12
17	#include <math.h>
18	#include <stdio.h>	13	#include <stdio.h>
19	#include <stdlib.h>	14	#include <stdlib.h>
20	#include <string.h>	15	#include <string.h>
21		16
22	#include <time.h>	17	#include <time.h>
34	#include <arpa/inet.h>	29	#include <arpa/inet.h>
35		30
36	#ifdef __linux	31	#ifdef __linux
37	# include <linux/icmp.h>	32	# include <linux/icmp.h>
38	#endif	33	#endif
39	#if IPV6	34	#if ENABLE_IPV6 && !defined (__CYGWIN__)
40	# include <netinet/icmp6.h>	35	# include <netinet/icmp6.h>
41	#endif	36	#endif
42		37
43	#define ICMP4_ECHO 8	38	#define ICMP4_ECHO 8
44	#define ICMP4_ECHO_REPLY 0	39	#define ICMP4_ECHO_REPLY 0
45	#define ICMP6_ECHO 128	40	#define ICMP6_ECHO 128
46	#define ICMP6_ECHO_REPLY 129	41	#define ICMP6_ECHO_REPLY 129
47		42
48	#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
49	#define MIN_INTERVAL .000001 // minimum packet send interval, in seconds	44	#define MIN_INTERVAL 1e-6 // minimum packet send interval, in seconds
50		45
51	#define HDR_SIZE_IP4 20	46	#define HDR_SIZE_IP4 20
52	#define HDR_SIZE_IP6 48	47	#define HDR_SIZE_IP6 48
53		48
54	//TODO: xread/xwrite for atomicity? we currently rely on the fact that the pip biffersize 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;
55		52
56	typedef uint8_t addr_t[16];	53	/*****************************************************************************/
57		54
58	typedef double tstamp;	55	typedef double tstamp;
59		56
60	tstamp	57	static tstamp
61	NOW ()	58	NOW (void)
62	{	59	{
63	struct timeval tv;	60	struct timeval tv;
		61
64	gettimeofday (&tv, 0);	62	gettimeofday (&tv, 0);
		63
65	return tv.tv_sec + tv.tv_usec * 0.000001;	64	return tv.tv_sec + tv.tv_usec * 1e-6;
66	}	65	}
67		66
		67	static void
		68	ssleep (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
68	typedef struct {	91	typedef struct
69	int family;	92	{
70	addr_t lo, hi;
71	double interval;
72	tstamp next;
73	} RANGE;
74
75	typedef struct {
76	SV *id;
77	double interval;
78	int nranges;
79	RANGE *ranges;
80	uint32_t payload;
81	} REQ;
82
83	typedef struct {
84	uint8_t version_ihl;	93	uint8_t version_ihl;
85	uint8_t tos;	94	uint8_t tos;
86	uint16_t tot_len;	95	uint16_t tot_len;
87		96
88	uint16_t id;	97	uint16_t id;
…		…
94		103
95	uint32_t src;	104	uint32_t src;
96	uint32_t dst;	105	uint32_t dst;
97	} IP4HDR;	106	} IP4HDR;
98		107
		108	/*****************************************************************************/
		109
		110	typedef uint8_t addr_tt[16];
		111
99	typedef struct {	112	typedef struct
100	uint8_t version;	113	{
101	uint8_t x1, x2, x3;	114	tstamp next;
		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
112
113	static uint16_t magic;
114
115	typedef struct {	124	typedef struct
		125	{
		126	RANGE **ranges;
		127	int rangecnt, rangemax;
		128
		129	tstamp next;
		130	tstamp interval;
		131
		132	tstamp maxrtt;
		133
		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	/*****************************************************************************/
		156
		157	typedef struct
		158	{
116	uint8_t type, code;	159	uint8_t type, code;
117	uint16_t cksum;	160	uint16_t cksum;
		161
118	uint16_t id, seq;	162	uint16_t id, seq;
		163
		164	uint16_t pinger;
		165	uint16_t magic;
		166
		167	uint32_t stamp_hi;
119	uint32_t payload;	168	uint32_t stamp_lo;
120	tstamp stamp; // be careful when accessing this
121	} PKT;	169	} PKT;
122		170
123	static pthread_t pthrid;
124	static int thr_send[2]; // send to worker
125	static int thr_recv[2]; // receive from worker
126
127	static int icmp4_fd, icmp6_fd;
128
129	static AV *cbs;
130
131	static uint16_t	171	static int
132	icmp_cksum (void *data, unsigned int len)	172	pkt_is_valid_for (PKT pkt, PINGER pinger)
133	{	173	{
134	register int sum = 0;	174	return pkt->id == pinger->magic1
135	uint16_t *wp;	175	&& pkt->seq == pinger->magic2
		176	&& pkt->magic == pinger->magic3;
		177	}
136		178
137	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.;
138		186
139	for (wp = (uint16_t *)data; len; wp++, len -= 2)	187	pkt->stamp_hi = ts;
140	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--);
141		211
142	sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */	212	sum = (sum >> 16) + (sum & 0xffff); /* add high 16 to low 16 */
143	sum += sum >> 16; /* add carry */	213	sum += sum >> 16; /* add carry */
144		214
		215	pkt->cksum = ~sum;
		216	}
		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
		237	static int
		238	range_send_ping (RANGE self, PKT pkt)
		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	{
		295	int len = sizeof (addr_tt) - 1;
		296
		297	while (!++self->lo [len])
		298	--len;
		299	}
		300	}
		301
145	return ~sum;	302	return 1;
146	}	303	}
147		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
148	static void	357	static void *
149	inc_addr (addr_t *addr)	358	ping_proc (void *self_)
150	{	359	{
151	int len = sizeof (addr_t) - 1;	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;
152		564
153	do	565	do
154	{	566	{
155	if ((*addr)[len] != 0xff)	567	dSP;
156	{	568	PINGER *self = pingers [firstrecv];
157	++(*addr)[len];	569	firstrecv = self->nextrecv;
158	break;
159	}
160		570
161	(*addr)[len] = 0;	571	self->nextrecv = -1;
162	}
163	while (len--);
164	}
165		572
166	static void *	573	PUSHMARK (SP);
167	ping_proc (void *unused)	574	XPUSHs (sv_2mortal (newRV_noinc ((SV *)self->recvq)));
168	{	575	self->recvq = 0;
169	PKT pkt;	576	PUTBACK;
170	struct sockaddr_in sa4;	577	call_sv (self->recvcb, G_DISCARD \| G_VOID);
171	#if IPV6
172	struct sockaddr_in6 sa6;
173	#endif
174
175	memset (&pkt, 0, sizeof (pkt));
176
177	memset (&sa4, 0, sizeof (sa4));
178	sa4.sin_family = AF_INET;
179	sa4.sin_port = 0;
180	#if IPV6
181	memset (&sa6, 0, sizeof (sa6));
182	sa6.sin6_family = AF_INET6;
183	sa6.sin6_port = 0;
184	#endif
185
186	for (;;)
187	{
188	REQ *req;
189	int len = read (thr_send [0], &req, sizeof (req));
190
191	if (!len)
192	pthread_exit (0);
193	else if (len != sizeof (req))
194	{
195	perror ("AnyEvent::FastPing: short reead or read error");
196	pthread_exit ((void *)-1);
197	}
198
199	//TODO: bind to source address
200
201	pkt.code = 0;
202	pkt.id = (uint16_t)magic;
203	pkt.seq = (uint16_t)~magic;
204	pkt.payload = req->payload;
205
206	tstamp now = NOW ();
207	tstamp next = now;
208
209	{
210	int r;
211	for (r = req->nranges; r--; )
212	inc_addr (&req->ranges [r].hi);
213	}	578	}
		579	while (firstrecv >= 0);
214		580
215	while (req->nranges)	581	FREETMPS;
216	{	582	LEAVE;
217	RANGE *range = req->ranges;
218
219	if (!memcmp (&range->lo, &range->hi, sizeof (addr_t)))
220	req->ranges [0] = req->ranges [--req->nranges];
221	else
222	{
223	// ranges [0] is always the next range to ping
224	tstamp wait = range->next - now;
225
226	// compare with the global frequency limit
227	{
228	tstamp diff = next - now;
229
230	if (wait < diff)
231	wait = diff;
232	else if (range)
233	next = range->next;
234	}
235
236	if (wait > 0.)
237	{
238	struct timespec ts;
239
240	ts.tv_sec = wait;
241	ts.tv_nsec = (wait - ts.tv_sec) * 1000000000.;
242
243	nanosleep (&ts, 0);
244	}
245
246	now = NOW ();
247
248	pkt.stamp = now;
249	pkt.cksum = 0;
250
251	if (range->family == AF_INET)
252	{
253	pkt.type = ICMP4_ECHO;
254	pkt.cksum = icmp_cksum (&pkt, sizeof (pkt));
255
256	memcpy (&sa4.sin_addr,
257	sizeof (addr_t) - sizeof (sa4.sin_addr) + (char *)&range->lo,
258	sizeof (sa4.sin_addr));
259
260	if (sendto (icmp4_fd, &pkt, sizeof (pkt), 0, (struct sockaddr *)&sa4, sizeof (sa4)) > 0)
261	errno = 0;
262	}
263	else
264	{
265	#if IPV6
266	pkt.type = ICMP6_ECHO;
267
268	memcpy (&sa6.sin6_addr,
269	sizeof (addr_t) - sizeof (sa6.sin6_addr) + (char *)&range->lo,
270	sizeof (sa6.sin6_addr));
271
272	if (sendto (icmp6_fd, &pkt, sizeof (pkt), 0, (struct sockaddr *)&sa6, sizeof (sa6)) > 0)
273	errno = 0;
274	#endif
275	}
276
277	if (errno == ENOBUFS)
278	{
279	struct timespec ts;
280
281	ts.tv_sec = 0;
282	ts.tv_nsec = DRAIN_INTERVAL * 1000000000;
283
284	nanosleep (&ts, 0);
285	}
286	else
287	{
288	inc_addr (&range->lo);
289
290	range->next = next;
291	range->next += range->interval;
292	}
293
294	next += req->interval;
295	}
296
297	// make a downheap operation
298	int k = 0;
299	int n = 0;
300	for (;;)
301	{
302	++n;
303	int j = k * 2 + 1;
304
305	if (j >= req->nranges)
306	break;
307	else if (j < req->nranges - 1)
308	if (req->ranges [j].next > req->ranges [j + 1].next)
309	++j;
310
311	if (req->ranges [j].next >= req->ranges [k].next)
312	break;
313
314	RANGE temp = req->ranges [k];
315	req->ranges [k] = req->ranges [j];
316	req->ranges [j] = temp;
317
318	k = j;
319	}
320	}
321
322	write (thr_recv [1], &req, sizeof (req));
323	}
324
325	return 0;
326	}	583	}
327		584
		585	/*****************************************************************************/
		586
		587	#if 0
328	static void	588	static void
329	feed_reply (AV *res_av)	589	feed_reply (AV *res_av)
330	{	590	{
331	if (av_len (res_av) < 0)
332	return;
333
334	dSP;	591	dSP;
335	SV res = sv_2mortal (newRV_inc ((SV )res_av));	592	SV res = sv_2mortal (newRV_inc ((SV )res_av));
336	int i;	593	int i;
		594
		595	if (av_len (res_av) < 0)
		596	return;
337		597
338	ENTER;	598	ENTER;
339	SAVETMPS;	599	SAVETMPS;
340		600
341	for (i = av_len (cbs) + 1; i--; )	601	for (i = av_len (cbs) + 1; i--; )
…		…
349	}	609	}
350		610
351	FREETMPS;	611	FREETMPS;
352	LEAVE;	612	LEAVE;
353	}	613	}
		614	#endif
354		615
355	static void	616	static void
356	boot ()	617	boot ()
357	{	618	{
358	sigset_t fullsigset, oldsigset;
359	pthread_attr_t attr;
360
361	if (pipe (thr_send) < 0)
362	croak ("AnyEvent::FastPing: unable to create send pipe");
363
364	if (pipe (thr_recv) < 0)	619	if (pipe (thr_res) < 0)
365	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]);
366		623
367	icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);	624	icmp4_fd = socket (AF_INET, SOCK_RAW, IPPROTO_ICMP);
368	fcntl (icmp4_fd, F_SETFL, O_NONBLOCK);	625	fcntl (icmp4_fd, F_SETFL, O_NONBLOCK);
369	#ifdef ICMP_FILTER	626	#ifdef ICMP_FILTER
370	{	627	{
…		…
372	oval.data = 0xffffffff & ~(1 << ICMP4_ECHO_REPLY);	629	oval.data = 0xffffffff & ~(1 << ICMP4_ECHO_REPLY);
373	setsockopt (icmp4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);	630	setsockopt (icmp4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
374	}	631	}
375	#endif	632	#endif
376		633
377	#if IPV6	634	#if ENABLE_IPV6
378	icmp6_fd = socket (AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);	635	icmp6_fd = socket (AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
379	fcntl (icmp6_fd, F_SETFL, O_NONBLOCK);	636	fcntl (icmp6_fd, F_SETFL, O_NONBLOCK);
380	# ifdef ICMP6_FILTER	637	# ifdef ICMP6_FILTER
381	{	638	{
382	struct icmp6_filter oval;	639	struct icmp6_filter oval;
…		…
385	setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval);	642	setsockopt (icmp6_fd, IPPROTO_ICMPV6, ICMP6_FILTER, &oval, sizeof oval);
386	}	643	}
387	# endif	644	# endif
388	#endif	645	#endif
389		646
390	pthread_attr_init (&attr);
391	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
392	#ifdef PTHREAD_SCOPE_PROCESS
393	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
394	#endif
395
396	sigfillset (&fullsigset);
397
398	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
399
400	if (pthread_create (&pthrid, &attr, ping_proc, 0))
401	croak ("AnyEvent::FastPing: unable to create pinger thread");
402
403	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
404
405	sv_setiv (get_sv ("AnyEvent::FastPing::THR_REQ_FD", 1), thr_send [1]);
406	sv_setiv (get_sv ("AnyEvent::FastPing::THR_RES_FD", 1), thr_recv [0]);
407
408	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd);	647	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP4_FD", 1), icmp4_fd);
409	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd);	648	sv_setiv (get_sv ("AnyEvent::FastPing::ICMP6_FD", 1), icmp6_fd);
410	}	649	}
411		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
412	MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing	655	MODULE = AnyEvent::FastPing PACKAGE = AnyEvent::FastPing PREFIX = pinger_
413		656
414	BOOT:	657	BOOT:
415	{	658	{
416	HV *stash = gv_stashpv ("AnyEvent::FastPing", 1);	659	HV *stash = gv_stashpv ("AnyEvent::FastPing", 1);
417		660
418	cbs = get_av ("AnyEvent::FastPing::CB", 1);	661	if (sizeof (PKT) & 3)
419	magic = getpid () ^ MAGIC;	662	croak ("size of PKT structure is not a multiple of 4");
420		663
421	boot ();	664	boot ();
422		665
423	newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0));	666	newCONSTSUB (stash, "ipv4_supported", newSViv (icmp4_fd >= 0));
424	newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0));	667	newCONSTSUB (stash, "ipv6_supported", newSViv (icmp6_fd >= 0));
…		…
427	newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT)));	670	newCONSTSUB (stash, "icmp6_pktsize", newSViv (HDR_SIZE_IP6 + sizeof (PKT)));
428	}	671	}
429		672
430	PROTOTYPES: DISABLE	673	PROTOTYPES: DISABLE
431		674
432	SV *
433	_req_icmp_ping (SV ranges, NV interval, U32 payload, SV id)
434	CODE:
435	{
436	if (!SvROK (ranges) \|\| SvTYPE (SvRV (ranges)) != SVt_PVAV)
437	croak ("address ranges must be given as arrayref with lo, hi pairs");
438
439	AV rav = (AV )SvRV (ranges);
440	int nranges = av_len (rav) + 1;
441
442	REQ *req = malloc (sizeof (REQ));
443	int i;
444
445	if (interval < MIN_INTERVAL)
446	interval = MIN_INTERVAL;
447
448	req->id = newSVsv (id);
449	req->interval = interval;
450	req->payload = payload;
451	req->nranges = nranges;
452	req->ranges = (RANGE )malloc (nranges sizeof (RANGE));
453
454	while (nranges--)
455	{
456	SV sv = av_fetch (rav, nranges, 1);
457
458	if (!SvROK (sv) \|\| SvTYPE (SvRV (sv)) != SVt_PVAV)
459	croak ("address range must be given as arrayref with lo, hi, interval arrayrefs");
460
461	AV av = (AV )SvRV (sv);
462	RANGE *r = req->ranges + nranges;
463
464	SV lo = av_fetch (av, 0, 1);
465	SV hi = av_fetch (av, 1, 1);
466
467	sv_utf8_downgrade (lo, 0);
468	sv_utf8_downgrade (hi, 0);
469
470	memset (&r->lo, 0, sizeof (addr_t));
471	memset (&r->hi, 0, sizeof (addr_t));
472
473	if (SvPOKp (lo) && SvPOKp (hi))
474	{
475	if (SvCUR (lo) != SvCUR (hi))
476	croak ("addresses in range must be of the same size (either 4 or 16 bytes)");
477
478	if (SvCUR (lo) == 4)
479	{
480	r->family = AF_INET;
481	memcpy (sizeof (addr_t) - 4 + (char *)&r->lo, SvPVX (lo), 4);
482	memcpy (sizeof (addr_t) - 4 + (char *)&r->hi, SvPVX (hi), 4);
483	}
484	else if (SvCUR (lo) == 16)
485	{
486	#if IPV6
487	r->family = AF_INET6;
488	memcpy (&r->lo, SvPVX (lo), sizeof (addr_t));
489	memcpy (&r->hi, SvPVX (hi), sizeof (addr_t));
490	#else
491	croak ("IPv6 not supported in this configuration");
492	#endif
493	}
494	else
495	croak ("addresses in range must be either 4 (IPv4) or 16 (IPV6) bytes in length");
496	}
497	else if (SvIOK (lo) && SvIOK (hi))
498	{
499	r->family = AF_INET;
500
501	uint32_t addr;
502	addr = htonl (SvUV (lo)); memcpy (sizeof (addr_t) - 4 + (char *)&r->lo, &addr, 4);
503	addr = htonl (SvUV (hi)); memcpy (sizeof (addr_t) - 4 + (char *)&r->hi, &addr, 4);
504	}
505	else
506	croak ("addresses in range must be strings with either 4 (IPv4) or 16 (IPv6) octets");
507
508	if (r->family == AF_INET)
509	{
510	if (icmp4_fd < 0)
511	croak ("AnyEvent::FastPing: IPv4 ping support not available on this system");
512	}
513	else
514	{
515	if (icmp6_fd < 0)
516	croak ("AnyEvent::FastPing: IPv6 ping support not available on this system");
517	}
518
519	r->interval = SvNV (*av_fetch (av, 2, 1));
520
521	if (r->interval < req->interval)
522	r->interval = req->interval;
523
524	r->next = 0.;
525	}
526
527	RETVAL = newSVpvn ((char *)&req, sizeof (req));
528	}
529	OUTPUT:
530	RETVAL
531
532	SV *
533	_read_res ()
534	CODE:
535	{
536	REQ *req;
537
538	if (read (thr_recv [0], &req, sizeof (req)) != sizeof (req))
539	RETVAL = &PL_sv_undef;
540
541	RETVAL = req->id;
542	free (req->ranges);
543	free (req);
544	}
545	OUTPUT:
546	RETVAL
547
548	void	675	void
549	_recv_icmp4 (...)	676	_recv_icmp4 (...)
550	CODE:	677	CODE:
551	{	678	{
552	char buf [512];	679	char buf [512];
553	struct sockaddr_in sa;	680	struct sockaddr_in sa;
554	socklen_t sl = sizeof (sa);	681	int maxrecv;
555	AV res_av = av_len (cbs) < 0 ? 0 : (AV )sv_2mortal ((SV *)newAV ());
556	tstamp now = NOW ();
557		682
558	for (;;)	683	for (maxrecv = 256+1; --maxrecv; )
559	{	684	{
		685	PINGER *pinger;
		686	IP4HDR iphdr = (IP4HDR )buf;
		687	socklen_t sl = sizeof (sa);
560	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);
		689	int hdrlen, totlen;
		690	PKT *pkt;
561		691
562	if (len <= HDR_SIZE_IP4)	692	if (len <= HDR_SIZE_IP4)
563	break;	693	break;
564		694
565	IP4HDR iphdr = (IP4HDR )buf;
566
567	int hdrlen = (iphdr->version_ihl & 15) * 4;	695	hdrlen = (iphdr->version_ihl & 15) * 4;
568	int totlen = ntohs (iphdr->tot_len);	696	totlen = ntohs (iphdr->tot_len);
569		697
570	// packet corrupt?
571	if (!res_av
572	\|\| totlen > len	698	if (totlen > len
573	\|\| iphdr->protocol != IPPROTO_ICMP	699	\|\| iphdr->protocol != IPPROTO_ICMP
574	\|\| hdrlen < HDR_SIZE_IP4 \|\| hdrlen + sizeof (PKT) != totlen)	700	\|\| hdrlen < HDR_SIZE_IP4 \|\| hdrlen + sizeof (PKT) != totlen)
575	continue;	701	continue;
576		702
577	PKT pkt = (PKT )(buf + hdrlen);	703	pkt = (PKT *)(buf + hdrlen);
578		704
579	if (pkt->type != ICMP4_ECHO_REPLY	705	if (pkt->type != ICMP4_ECHO_REPLY
580	\|\| pkt->id != (uint16_t) magic	706	\|\| pkt->pinger >= pingercnt
581	\|\| pkt->seq != (uint16_t)~magic	707	\|\| !pingers [pkt->pinger])
582	\|\| !isnormal (pkt->stamp))
583	continue;	708	continue;
584		709
585	AV *av = newAV ();	710	pinger = pingers [pkt->pinger];
586	av_push (av, newSVpvn ((char *)&sa.sin_addr, 4));
587	av_push (av, newSVnv (now - pkt->stamp));
588	av_push (av, newSVuv (pkt->payload));
589		711
590	av_push (res_av, newRV_noinc ((SV *)av));	712	if (!pkt_is_valid_for (pkt, pinger))
		713	continue;
		714
		715	recv_feed (pinger, &sa.sin_addr, 4, NOW () - pkt_to_ts (pkt));
591	}	716	}
592		717
593	if (res_av)	718	recv_flush ();
594	feed_reply (res_av);
595	}	719	}
596		720
597	void	721	void
598	_recv_icmp6 (...)	722	_recv_icmp6 (...)
599	CODE:	723	CODE:
600	{	724	{
601	struct sockaddr_in6 sa;	725	struct sockaddr_in6 sa;
602	socklen_t sl = sizeof (sa);
603	AV res_av = av_len (cbs) < 0 ? 0 : (AV )sv_2mortal ((SV *)newAV ());
604	PKT pkt;	726	PKT pkt;
605	tstamp now = NOW ();	727	int maxrecv;
606		728
607	for (;;)	729	for (maxrecv = 256+1; --maxrecv; )
608	{	730	{
		731	PINGER *pinger;
		732	socklen_t sl = sizeof (sa);
609	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);
610		734
611	if (len != sizeof (PKT))	735	if (len != sizeof (PKT))
612	break;	736	break;
613		737
614	if (!res_av
615	\|\| pkt.type != ICMP6_ECHO_REPLY	738	if (pkt.type != ICMP6_ECHO_REPLY
616	\|\| pkt.id != (uint16_t) magic	739	\|\| pkt.pinger >= pingercnt
617	\|\| pkt.seq != (uint16_t)~magic	740	\|\| !pingers [pkt.pinger])
618	\|\| !isnormal (pkt.stamp))
619	continue;	741	continue;
620		742
621	AV *av = newAV ();	743	pinger = pingers [pkt.pinger];
622	av_push (av, newSVpvn ((char *)&sa.sin6_addr, 16));
623	av_push (av, newSVnv (now - pkt.stamp));
624	av_push (av, newSVuv (pkt.payload));
625		744
626	av_push (res_av, newRV_noinc ((SV *)av));	745	if (!pkt_is_valid_for (&pkt, pinger))
		746	continue;
		747
		748	recv_feed (pinger, &sa.sin6_addr, 16, NOW () - pkt_to_ts (&pkt));
627	}	749	}
628		750
629	if (res_av)	751	recv_flush ();
630	feed_reply (res_av);
631	}	752	}
632		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 1.2 by root, Sat May 17 21:47:29 2008 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 1.2 by root, Sat May 17 21:47:29 2008 UTC vs.
Revision 1.12 by root, Wed Feb 2 19:26:45 2011 UTC