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37835947 MT |
1 | From 63f9f8beed445a80dcb492570b105c5b50e65a59 Mon Sep 17 00:00:00 2001 |
2 | From: Michael Tremer <michael.tremer@ipfire.org> | |
3 | Date: Mon, 29 Jun 2015 20:49:02 +0000 | |
4 | Subject: [PATCH 2/2] latency: Rewrite latency module | |
5 | ||
6 | This patch replaces the builtin python implementation | |
7 | that pinged hosts by a Python C module that uses liboping. | |
8 | ||
9 | liboping is able to ping IPv6 hosts as well and should | |
10 | implement the ICMP protocol more appropriately. | |
11 | ||
12 | The graph has been extended so that hosts will have a | |
13 | line for latency over IPv6 and IPv4 if available and | |
14 | the packet loss is merged from both protocols, too. | |
15 | ||
16 | Signed-off-by: Michael Tremer <michael.tremer@ipfire.org> | |
17 | --- | |
18 | Makefile.am | 5 +- | |
19 | configure.ac | 2 + | |
20 | po/POTFILES.in | 1 - | |
21 | src/_collectymodule.c | 338 ++++++++++++++++++++++++++++++++++++++++ | |
22 | src/collecty/ping.py | 324 -------------------------------------- | |
23 | src/collecty/plugins/latency.py | 151 +++++++++++------- | |
24 | 6 files changed, 437 insertions(+), 384 deletions(-) | |
25 | delete mode 100644 src/collecty/ping.py | |
26 | ||
27 | diff --git a/Makefile.am b/Makefile.am | |
28 | index fe00da7..0b7e299 100644 | |
29 | --- a/Makefile.am | |
30 | +++ b/Makefile.am | |
31 | @@ -79,8 +79,7 @@ collecty_PYTHON = \ | |
32 | src/collecty/daemon.py \ | |
33 | src/collecty/errors.py \ | |
34 | src/collecty/i18n.py \ | |
35 | - src/collecty/logger.py \ | |
36 | - src/collecty/ping.py | |
37 | + src/collecty/logger.py | |
38 | ||
39 | collectydir = $(pythondir)/collecty | |
40 | ||
41 | @@ -109,6 +108,7 @@ _collecty_la_SOURCES = \ | |
42 | _collecty_la_CFLAGS = \ | |
43 | $(AM_CFLAGS) \ | |
44 | $(LIBATASMART_CFLAGS) \ | |
45 | + $(OPING_CFLAGS) \ | |
46 | $(PYTHON_CFLAGS) | |
47 | ||
48 | _collecty_la_LDFLAGS = \ | |
49 | @@ -119,6 +119,7 @@ _collecty_la_LDFLAGS = \ | |
50 | ||
51 | _collecty_la_LIBADD = \ | |
52 | $(LIBATASMART_LIBS) \ | |
53 | + $(OPING_LIBS) \ | |
54 | $(PYTHON_LIBS) \ | |
55 | $(SENSORS_LIBS) | |
56 | ||
57 | diff --git a/configure.ac b/configure.ac | |
58 | index 59250ca..9b540fd 100644 | |
59 | --- a/configure.ac | |
60 | +++ b/configure.ac | |
61 | @@ -61,6 +61,8 @@ AC_PROG_GCC_TRADITIONAL | |
62 | ||
63 | AC_PATH_PROG([XSLTPROC], [xsltproc]) | |
64 | ||
65 | +PKG_CHECK_MODULES([OPING], [liboping]) | |
66 | + | |
67 | # Python | |
68 | AM_PATH_PYTHON([3.2]) | |
69 | PKG_CHECK_MODULES([PYTHON], [python-${PYTHON_VERSION}]) | |
70 | diff --git a/po/POTFILES.in b/po/POTFILES.in | |
71 | index f6aebb3..a96f7b2 100644 | |
72 | --- a/po/POTFILES.in | |
73 | +++ b/po/POTFILES.in | |
74 | @@ -5,7 +5,6 @@ src/collecty/daemon.py | |
75 | src/collecty/errors.py | |
76 | src/collecty/i18n.py | |
77 | src/collecty/__init__.py | |
78 | -src/collecty/ping.py | |
79 | src/collecty/plugins/base.py | |
80 | src/collecty/plugins/conntrack.py | |
81 | src/collecty/plugins/cpu.py | |
82 | diff --git a/src/_collectymodule.c b/src/_collectymodule.c | |
83 | index 422c27d..c13ca69 100644 | |
84 | --- a/src/_collectymodule.c | |
85 | +++ b/src/_collectymodule.c | |
86 | @@ -22,15 +22,21 @@ | |
87 | #include <errno.h> | |
88 | #include <fcntl.h> | |
89 | #include <linux/hdreg.h> | |
90 | +#include <oping.h> | |
91 | #include <sensors/error.h> | |
92 | #include <sensors/sensors.h> | |
93 | #include <stdbool.h> | |
94 | #include <string.h> | |
95 | #include <sys/ioctl.h> | |
96 | +#include <time.h> | |
97 | ||
98 | #define MODEL_SIZE 40 | |
99 | #define SERIAL_SIZE 20 | |
100 | ||
101 | +#define PING_HISTORY_SIZE 1024 | |
102 | +#define PING_DEFAULT_COUNT 10 | |
103 | +#define PING_DEFAULT_TIMEOUT 8 | |
104 | + | |
105 | typedef struct { | |
106 | PyObject_HEAD | |
107 | char* path; | |
108 | @@ -313,6 +319,324 @@ static PyTypeObject BlockDeviceType = { | |
109 | BlockDevice_new, /* tp_new */ | |
110 | }; | |
111 | ||
112 | +static PyObject* PyExc_PingError; | |
113 | +static PyObject* PyExc_PingAddHostError; | |
114 | + | |
115 | +typedef struct { | |
116 | + PyObject_HEAD | |
117 | + pingobj_t* ping; | |
118 | + const char* host; | |
119 | + struct { | |
120 | + double history[PING_HISTORY_SIZE]; | |
121 | + size_t history_index; | |
122 | + size_t history_size; | |
123 | + size_t packets_sent; | |
124 | + size_t packets_rcvd; | |
125 | + double average; | |
126 | + double stddev; | |
127 | + double loss; | |
128 | + } stats; | |
129 | +} PingObject; | |
130 | + | |
131 | +static void Ping_dealloc(PingObject* self) { | |
132 | + if (self->ping) | |
133 | + ping_destroy(self->ping); | |
134 | + | |
135 | + Py_TYPE(self)->tp_free((PyObject*)self); | |
136 | +} | |
137 | + | |
138 | +static void Ping_init_stats(PingObject* self) { | |
139 | + self->stats.history_index = 0; | |
140 | + self->stats.history_size = 0; | |
141 | + self->stats.packets_sent = 0; | |
142 | + self->stats.packets_rcvd = 0; | |
143 | + | |
144 | + self->stats.average = 0.0; | |
145 | + self->stats.stddev = 0.0; | |
146 | + self->stats.loss = 0.0; | |
147 | +} | |
148 | + | |
149 | +static PyObject* Ping_new(PyTypeObject* type, PyObject* args, PyObject* kwds) { | |
150 | + PingObject* self = (PingObject*)type->tp_alloc(type, 0); | |
151 | + | |
152 | + if (self) { | |
153 | + self->ping = NULL; | |
154 | + self->host = NULL; | |
155 | + | |
156 | + Ping_init_stats(self); | |
157 | + } | |
158 | + | |
159 | + return (PyObject*)self; | |
160 | +} | |
161 | + | |
162 | +static int Ping_init(PingObject* self, PyObject* args, PyObject* kwds) { | |
163 | + char* kwlist[] = {"host", "family", "timeout", "ttl", NULL}; | |
164 | + int family = PING_DEF_AF; | |
165 | + double timeout = PING_DEFAULT_TIMEOUT; | |
166 | + int ttl = PING_DEF_TTL; | |
167 | + | |
168 | + if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|idi", kwlist, &self->host, | |
169 | + &family, &timeout, &ttl)) | |
170 | + return -1; | |
171 | + | |
172 | + if (family != AF_UNSPEC && family != AF_INET6 && family != AF_INET) { | |
173 | + PyErr_Format(PyExc_ValueError, "Family must be AF_UNSPEC, AF_INET6, or AF_INET"); | |
174 | + return -1; | |
175 | + } | |
176 | + | |
177 | + if (timeout < 0) { | |
178 | + PyErr_Format(PyExc_ValueError, "Timeout must be greater than zero"); | |
179 | + return -1; | |
180 | + } | |
181 | + | |
182 | + if (ttl < 1 || ttl > 255) { | |
183 | + PyErr_Format(PyExc_ValueError, "TTL must be between 1 and 255"); | |
184 | + return -1; | |
185 | + } | |
186 | + | |
187 | + self->ping = ping_construct(); | |
188 | + if (!self->ping) { | |
189 | + return -1; | |
190 | + } | |
191 | + | |
192 | + // Set options | |
193 | + int r; | |
194 | + | |
195 | + r = ping_setopt(self->ping, PING_OPT_AF, &family); | |
196 | + if (r) { | |
197 | + PyErr_Format(PyExc_RuntimeError, "Could not set address family: %s", | |
198 | + ping_get_error(self->ping)); | |
199 | + return -1; | |
200 | + } | |
201 | + | |
202 | + if (timeout > 0) { | |
203 | + r = ping_setopt(self->ping, PING_OPT_TIMEOUT, &timeout); | |
204 | + | |
205 | + if (r) { | |
206 | + PyErr_Format(PyExc_RuntimeError, "Could not set timeout: %s", | |
207 | + ping_get_error(self->ping)); | |
208 | + return -1; | |
209 | + } | |
210 | + } | |
211 | + | |
212 | + r = ping_setopt(self->ping, PING_OPT_TTL, &ttl); | |
213 | + if (r) { | |
214 | + PyErr_Format(PyExc_RuntimeError, "Could not set TTL: %s", | |
215 | + ping_get_error(self->ping)); | |
216 | + return -1; | |
217 | + } | |
218 | + | |
219 | + return 0; | |
220 | +} | |
221 | + | |
222 | +static double Ping_compute_average(PingObject* self) { | |
223 | + assert(self->stats.packets_rcvd > 0); | |
224 | + | |
225 | + double total_latency = 0.0; | |
226 | + | |
227 | + for (int i = 0; i < self->stats.history_size; i++) { | |
228 | + if (self->stats.history[i] > 0) | |
229 | + total_latency += self->stats.history[i]; | |
230 | + } | |
231 | + | |
232 | + return total_latency / self->stats.packets_rcvd; | |
233 | +} | |
234 | + | |
235 | +static double Ping_compute_stddev(PingObject* self, double mean) { | |
236 | + assert(self->stats.packets_rcvd > 0); | |
237 | + | |
238 | + double deviation = 0.0; | |
239 | + | |
240 | + for (int i = 0; i < self->stats.history_size; i++) { | |
241 | + if (self->stats.history[i] > 0) { | |
242 | + deviation += pow(self->stats.history[i] - mean, 2); | |
243 | + } | |
244 | + } | |
245 | + | |
246 | + // Normalise | |
247 | + deviation /= self->stats.packets_rcvd; | |
248 | + | |
249 | + return sqrt(deviation); | |
250 | +} | |
251 | + | |
252 | +static void Ping_compute_stats(PingObject* self) { | |
253 | + // Compute the average latency | |
254 | + self->stats.average = Ping_compute_average(self); | |
255 | + | |
256 | + // Compute the standard deviation | |
257 | + self->stats.stddev = Ping_compute_stddev(self, self->stats.average); | |
258 | + | |
259 | + // Compute lost packets | |
260 | + self->stats.loss = 1.0; | |
261 | + self->stats.loss -= (double)self->stats.packets_rcvd \ | |
262 | + / (double)self->stats.packets_sent; | |
263 | +} | |
264 | + | |
265 | +static double time_elapsed(struct timeval* t0) { | |
266 | + struct timeval now; | |
267 | + gettimeofday(&now, NULL); | |
268 | + | |
269 | + double r = now.tv_sec - t0->tv_sec; | |
270 | + r += ((double)now.tv_usec / 1000000) - ((double)t0->tv_usec / 1000000); | |
271 | + | |
272 | + return r; | |
273 | +} | |
274 | + | |
275 | +static PyObject* Ping_ping(PingObject* self, PyObject* args, PyObject* kwds) { | |
276 | + char* kwlist[] = {"count", "deadline", NULL}; | |
277 | + size_t count = PING_DEFAULT_COUNT; | |
278 | + double deadline = 0; | |
279 | + | |
280 | + if (!PyArg_ParseTupleAndKeywords(args, kwds, "|Id", kwlist, &count, &deadline)) | |
281 | + return NULL; | |
282 | + | |
283 | + int r = ping_host_add(self->ping, self->host); | |
284 | + if (r) { | |
285 | + PyErr_Format(PyExc_PingAddHostError, "Could not add host %s: %s", | |
286 | + self->host, ping_get_error(self->ping)); | |
287 | + return NULL; | |
288 | + } | |
289 | + | |
290 | + // Reset all collected statistics in case ping() is called more than once. | |
291 | + Ping_init_stats(self); | |
292 | + | |
293 | + // Save start time | |
294 | + struct timeval time_start; | |
295 | + r = gettimeofday(&time_start, NULL); | |
296 | + if (r) { | |
297 | + PyErr_Format(PyExc_RuntimeError, "Could not determine start time"); | |
298 | + return NULL; | |
299 | + } | |
300 | + | |
301 | + // Do the pinging | |
302 | + while (count--) { | |
303 | + self->stats.packets_sent++; | |
304 | + | |
305 | + Py_BEGIN_ALLOW_THREADS | |
306 | + r = ping_send(self->ping); | |
307 | + Py_END_ALLOW_THREADS | |
308 | + | |
309 | + // Count recieved packets | |
310 | + if (r >= 0) { | |
311 | + self->stats.packets_rcvd += r; | |
312 | + | |
313 | + // Raise any errors | |
314 | + } else { | |
315 | + PyErr_Format(PyExc_RuntimeError, "Error executing ping_send(): %s", | |
316 | + ping_get_error(self->ping)); | |
317 | + return NULL; | |
318 | + } | |
319 | + | |
320 | + // Extract all data | |
321 | + pingobj_iter_t* iter = ping_iterator_get(self->ping); | |
322 | + | |
323 | + double* latency = &self->stats.history[self->stats.history_index]; | |
324 | + size_t buffer_size = sizeof(latency); | |
325 | + ping_iterator_get_info(iter, PING_INFO_LATENCY, latency, &buffer_size); | |
326 | + | |
327 | + // Increase the history pointer | |
328 | + self->stats.history_index++; | |
329 | + self->stats.history_index %= sizeof(self->stats.history); | |
330 | + | |
331 | + // Increase the history size | |
332 | + if (self->stats.history_size < sizeof(self->stats.history)) | |
333 | + self->stats.history_size++; | |
334 | + | |
335 | + // Check if the deadline is due | |
336 | + if (deadline > 0) { | |
337 | + double elapsed_time = time_elapsed(&time_start); | |
338 | + | |
339 | + // If we have run longer than the deadline is, we end the main loop | |
340 | + if (elapsed_time >= deadline) | |
341 | + break; | |
342 | + } | |
343 | + } | |
344 | + | |
345 | + if (self->stats.packets_rcvd == 0) { | |
346 | + PyErr_Format(PyExc_PingError, "No replies received"); | |
347 | + return NULL; | |
348 | + } | |
349 | + | |
350 | + Ping_compute_stats(self); | |
351 | + | |
352 | + Py_RETURN_NONE; | |
353 | +} | |
354 | + | |
355 | +static PyObject* Ping_get_packets_sent(PingObject* self) { | |
356 | + return PyLong_FromUnsignedLong(self->stats.packets_sent); | |
357 | +} | |
358 | + | |
359 | +static PyObject* Ping_get_packets_rcvd(PingObject* self) { | |
360 | + return PyLong_FromUnsignedLong(self->stats.packets_rcvd); | |
361 | +} | |
362 | + | |
363 | +static PyObject* Ping_get_average(PingObject* self) { | |
364 | + return PyFloat_FromDouble(self->stats.average); | |
365 | +} | |
366 | + | |
367 | +static PyObject* Ping_get_stddev(PingObject* self) { | |
368 | + return PyFloat_FromDouble(self->stats.stddev); | |
369 | +} | |
370 | + | |
371 | +static PyObject* Ping_get_loss(PingObject* self) { | |
372 | + return PyFloat_FromDouble(self->stats.loss); | |
373 | +} | |
374 | + | |
375 | +static PyGetSetDef Ping_getsetters[] = { | |
376 | + {"average", (getter)Ping_get_average, NULL, NULL, NULL}, | |
377 | + {"loss", (getter)Ping_get_loss, NULL, NULL, NULL}, | |
378 | + {"stddev", (getter)Ping_get_stddev, NULL, NULL, NULL}, | |
379 | + {"packets_sent", (getter)Ping_get_packets_sent, NULL, NULL, NULL}, | |
380 | + {"packets_rcvd", (getter)Ping_get_packets_rcvd, NULL, NULL, NULL}, | |
381 | + {NULL} | |
382 | +}; | |
383 | + | |
384 | +static PyMethodDef Ping_methods[] = { | |
385 | + {"ping", (PyCFunction)Ping_ping, METH_VARARGS|METH_KEYWORDS, NULL}, | |
386 | + {NULL} | |
387 | +}; | |
388 | + | |
389 | +static PyTypeObject PingType = { | |
390 | + PyVarObject_HEAD_INIT(NULL, 0) | |
391 | + "_collecty.Ping", /*tp_name*/ | |
392 | + sizeof(PingObject), /*tp_basicsize*/ | |
393 | + 0, /*tp_itemsize*/ | |
394 | + (destructor)Ping_dealloc, /*tp_dealloc*/ | |
395 | + 0, /*tp_print*/ | |
396 | + 0, /*tp_getattr*/ | |
397 | + 0, /*tp_setattr*/ | |
398 | + 0, /*tp_compare*/ | |
399 | + 0, /*tp_repr*/ | |
400 | + 0, /*tp_as_number*/ | |
401 | + 0, /*tp_as_sequence*/ | |
402 | + 0, /*tp_as_mapping*/ | |
403 | + 0, /*tp_hash */ | |
404 | + 0, /*tp_call*/ | |
405 | + 0, /*tp_str*/ | |
406 | + 0, /*tp_getattro*/ | |
407 | + 0, /*tp_setattro*/ | |
408 | + 0, /*tp_as_buffer*/ | |
409 | + Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/ | |
410 | + "Ping object", /* tp_doc */ | |
411 | + 0, /* tp_traverse */ | |
412 | + 0, /* tp_clear */ | |
413 | + 0, /* tp_richcompare */ | |
414 | + 0, /* tp_weaklistoffset */ | |
415 | + 0, /* tp_iter */ | |
416 | + 0, /* tp_iternext */ | |
417 | + Ping_methods, /* tp_methods */ | |
418 | + 0, /* tp_members */ | |
419 | + Ping_getsetters, /* tp_getset */ | |
420 | + 0, /* tp_base */ | |
421 | + 0, /* tp_dict */ | |
422 | + 0, /* tp_descr_get */ | |
423 | + 0, /* tp_descr_set */ | |
424 | + 0, /* tp_dictoffset */ | |
425 | + (initproc)Ping_init, /* tp_init */ | |
426 | + 0, /* tp_alloc */ | |
427 | + Ping_new, /* tp_new */ | |
428 | +}; | |
429 | + | |
430 | typedef struct { | |
431 | PyObject_HEAD | |
432 | const sensors_chip_name* chip; | |
433 | @@ -743,6 +1067,9 @@ PyMODINIT_FUNC PyInit__collecty(void) { | |
434 | if (PyType_Ready(&BlockDeviceType) < 0) | |
435 | return NULL; | |
436 | ||
437 | + if (PyType_Ready(&PingType) < 0) | |
438 | + return NULL; | |
439 | + | |
440 | if (PyType_Ready(&SensorType) < 0) | |
441 | return NULL; | |
442 | ||
443 | @@ -751,6 +1078,17 @@ PyMODINIT_FUNC PyInit__collecty(void) { | |
444 | Py_INCREF(&BlockDeviceType); | |
445 | PyModule_AddObject(m, "BlockDevice", (PyObject*)&BlockDeviceType); | |
446 | ||
447 | + Py_INCREF(&PingType); | |
448 | + PyModule_AddObject(m, "Ping", (PyObject*)&PingType); | |
449 | + | |
450 | + PyExc_PingError = PyErr_NewException("_collecty.PingError", NULL, NULL); | |
451 | + Py_INCREF(PyExc_PingError); | |
452 | + PyModule_AddObject(m, "PingError", PyExc_PingError); | |
453 | + | |
454 | + PyExc_PingAddHostError = PyErr_NewException("_collecty.PingAddHostError", NULL, NULL); | |
455 | + Py_INCREF(PyExc_PingAddHostError); | |
456 | + PyModule_AddObject(m, "PingAddHostError", PyExc_PingAddHostError); | |
457 | + | |
458 | Py_INCREF(&SensorType); | |
459 | PyModule_AddObject(m, "Sensor", (PyObject*)&SensorType); | |
460 | ||
461 | diff --git a/src/collecty/ping.py b/src/collecty/ping.py | |
462 | deleted file mode 100644 | |
463 | index e2d7970..0000000 | |
464 | --- a/src/collecty/ping.py | |
465 | +++ /dev/null | |
466 | @@ -1,324 +0,0 @@ | |
467 | -#!/usr/bin/python3 | |
468 | - | |
469 | -import array | |
470 | -import math | |
471 | -import os | |
472 | -import random | |
473 | -import select | |
474 | -import socket | |
475 | -import struct | |
476 | -import sys | |
477 | -import time | |
478 | - | |
479 | -ICMP_TYPE_ECHO_REPLY = 0 | |
480 | -ICMP_TYPE_ECHO_REQUEST = 8 | |
481 | -ICMP_MAX_RECV = 2048 | |
482 | - | |
483 | -MAX_SLEEP = 1000 | |
484 | - | |
485 | -class PingError(Exception): | |
486 | - msg = None | |
487 | - | |
488 | - | |
489 | -class PingResolveError(PingError): | |
490 | - msg = "Could not resolve hostname" | |
491 | - | |
492 | - | |
493 | -class Ping(object): | |
494 | - def __init__(self, destination, timeout=1000, packet_size=56): | |
495 | - self.destination = self._resolve(destination) | |
496 | - self.timeout = timeout | |
497 | - self.packet_size = packet_size | |
498 | - | |
499 | - self.id = os.getpid() & 0xffff # XXX ? Is this a good idea? | |
500 | - | |
501 | - self.seq_number = 0 | |
502 | - | |
503 | - # Number of sent packets. | |
504 | - self.send_count = 0 | |
505 | - | |
506 | - # Save the delay of all responses. | |
507 | - self.times = [] | |
508 | - | |
509 | - def run(self, count=None, deadline=None): | |
510 | - while True: | |
511 | - delay = self.do() | |
512 | - | |
513 | - self.seq_number += 1 | |
514 | - | |
515 | - if count and self.seq_number >= count: | |
516 | - break | |
517 | - | |
518 | - if deadline and self.total_time >= deadline: | |
519 | - break | |
520 | - | |
521 | - if delay == None: | |
522 | - delay = 0 | |
523 | - | |
524 | - if MAX_SLEEP > delay: | |
525 | - time.sleep((MAX_SLEEP - delay) / 1000) | |
526 | - | |
527 | - def do(self): | |
528 | - s = None | |
529 | - try: | |
530 | - # Open a socket for ICMP communication. | |
531 | - s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.getprotobyname("icmp")) | |
532 | - | |
533 | - # Send one packet. | |
534 | - send_time = self.send_icmp_echo_request(s) | |
535 | - | |
536 | - # Increase number of sent packets (even if it could not be sent). | |
537 | - self.send_count += 1 | |
538 | - | |
539 | - # If the packet could not be sent, we may stop here. | |
540 | - if send_time is None: | |
541 | - return | |
542 | - | |
543 | - # Wait for the reply. | |
544 | - receive_time, packet_size, ip, ip_header, icmp_header = self.receive_icmp_echo_reply(s) | |
545 | - | |
546 | - finally: | |
547 | - # Close the socket. | |
548 | - if s: | |
549 | - s.close() | |
550 | - | |
551 | - # If a packet has been received... | |
552 | - if receive_time: | |
553 | - delay = (receive_time - send_time) * 1000 | |
554 | - self.times.append(delay) | |
555 | - | |
556 | - return delay | |
557 | - | |
558 | - def send_icmp_echo_request(self, s): | |
559 | - # Header is type (8), code (8), checksum (16), id (16), sequence (16) | |
560 | - checksum = 0 | |
561 | - | |
562 | - # Create a header with checksum == 0. | |
563 | - header = struct.pack("!BBHHH", ICMP_TYPE_ECHO_REQUEST, 0, | |
564 | - checksum, self.id, self.seq_number) | |
565 | - | |
566 | - # Get some bytes for padding. | |
567 | - padding = os.urandom(self.packet_size) | |
568 | - | |
569 | - # Calculate the checksum for header + padding data. | |
570 | - checksum = self._calculate_checksum(header + padding) | |
571 | - | |
572 | - # Rebuild the header with the new checksum. | |
573 | - header = struct.pack("!BBHHH", ICMP_TYPE_ECHO_REQUEST, 0, | |
574 | - checksum, self.id, self.seq_number) | |
575 | - | |
576 | - # Build the packet. | |
577 | - packet = header + padding | |
578 | - | |
579 | - # Save the time when the packet has been sent. | |
580 | - send_time = time.time() | |
581 | - | |
582 | - # Send the packet. | |
583 | - try: | |
584 | - s.sendto(packet, (self.destination, 0)) | |
585 | - except socket.error as e: | |
586 | - if e.errno == 1: # Operation not permitted | |
587 | - # The packet could not be sent, probably because of | |
588 | - # wrong firewall settings. | |
589 | - return | |
590 | - | |
591 | - return send_time | |
592 | - | |
593 | - def receive_icmp_echo_reply(self, s): | |
594 | - timeout = self.timeout / 1000.0 | |
595 | - | |
596 | - # Wait until the reply packet arrived or until we hit timeout. | |
597 | - while True: | |
598 | - select_start = time.time() | |
599 | - | |
600 | - inputready, outputready, exceptready = select.select([s], [], [], timeout) | |
601 | - select_duration = (time.time() - select_start) | |
602 | - | |
603 | - if inputready == []: # Timeout | |
604 | - return None, 0, 0, 0, 0 | |
605 | - | |
606 | - # Save the time when the packet has been received. | |
607 | - receive_time = time.time() | |
608 | - | |
609 | - # Read the packet from the socket. | |
610 | - packet_data, address = s.recvfrom(ICMP_MAX_RECV) | |
611 | - | |
612 | - # Parse the ICMP header. | |
613 | - icmp_header = self._header2dict( | |
614 | - ["type", "code", "checksum", "packet_id", "seq_number"], | |
615 | - "!BBHHH", packet_data[20:28] | |
616 | - ) | |
617 | - | |
618 | - # This is the reply to our packet if the ID matches. | |
619 | - if icmp_header["packet_id"] == self.id: | |
620 | - # Parse the IP header. | |
621 | - ip_header = self._header2dict( | |
622 | - ["version", "type", "length", "id", "flags", | |
623 | - "ttl", "protocol", "checksum", "src_ip", "dst_ip"], | |
624 | - "!BBHHHBBHII", packet_data[:20] | |
625 | - ) | |
626 | - | |
627 | - packet_size = len(packet_data) - 28 | |
628 | - ip = socket.inet_ntoa(struct.pack("!I", ip_header["src_ip"])) | |
629 | - | |
630 | - return receive_time, packet_size, ip, ip_header, icmp_header | |
631 | - | |
632 | - # Check if the timeout has already been hit. | |
633 | - timeout = timeout - select_duration | |
634 | - if timeout <= 0: | |
635 | - return None, 0, 0, 0, 0 | |
636 | - | |
637 | - def _header2dict(self, names, struct_format, data): | |
638 | - """ | |
639 | - Unpack tghe raw received IP and ICMP header informations to a dict | |
640 | - """ | |
641 | - unpacked_data = struct.unpack(struct_format, data) | |
642 | - return dict(list(zip(names, unpacked_data))) | |
643 | - | |
644 | - def _calculate_checksum(self, source_string): | |
645 | - if len(source_string) % 2: | |
646 | - source_string += "\x00" | |
647 | - | |
648 | - converted = array.array("H", source_string) | |
649 | - if sys.byteorder == "big": | |
650 | - converted.byteswap() | |
651 | - | |
652 | - val = sum(converted) | |
653 | - | |
654 | - # Truncate val to 32 bits (a variance from ping.c, which uses signed | |
655 | - # integers, but overflow is unlinkely in ping). | |
656 | - val &= 0xffffffff | |
657 | - | |
658 | - # Add high 16 bits to low 16 bits. | |
659 | - val = (val >> 16) + (val & 0xffff) | |
660 | - | |
661 | - # Add carry from above (if any). | |
662 | - val += (val >> 16) | |
663 | - | |
664 | - # Invert and truncate to 16 bits. | |
665 | - answer = ~val & 0xffff | |
666 | - | |
667 | - return socket.htons(answer) | |
668 | - | |
669 | - def _resolve(self, host): | |
670 | - """ | |
671 | - Resolve host. | |
672 | - """ | |
673 | - if self._is_valid_ipv4_address(host): | |
674 | - return host | |
675 | - | |
676 | - try: | |
677 | - return socket.gethostbyname(host) | |
678 | - except socket.gaierror as e: | |
679 | - if e.errno == -3: | |
680 | - raise PingResolveError | |
681 | - | |
682 | - raise | |
683 | - | |
684 | - def _is_valid_ipv4_address(self, addr): | |
685 | - """ | |
686 | - Check addr to be a valid IPv4 address. | |
687 | - """ | |
688 | - parts = addr.split(".") | |
689 | - | |
690 | - if not len(parts) == 4: | |
691 | - return False | |
692 | - | |
693 | - for part in parts: | |
694 | - try: | |
695 | - number = int(part) | |
696 | - except ValueError: | |
697 | - return False | |
698 | - | |
699 | - if number > 255: | |
700 | - return False | |
701 | - | |
702 | - return True | |
703 | - | |
704 | - @property | |
705 | - def receive_count(self): | |
706 | - """ | |
707 | - The number of received packets. | |
708 | - """ | |
709 | - return len(self.times) | |
710 | - | |
711 | - @property | |
712 | - def total_time(self): | |
713 | - """ | |
714 | - The total time of all roundtrips. | |
715 | - """ | |
716 | - try: | |
717 | - return sum(self.times) | |
718 | - except ValueError: | |
719 | - return | |
720 | - | |
721 | - @property | |
722 | - def min_time(self): | |
723 | - """ | |
724 | - The smallest roundtrip time. | |
725 | - """ | |
726 | - try: | |
727 | - return min(self.times) | |
728 | - except ValueError: | |
729 | - return | |
730 | - | |
731 | - @property | |
732 | - def max_time(self): | |
733 | - """ | |
734 | - The biggest roundtrip time. | |
735 | - """ | |
736 | - try: | |
737 | - return max(self.times) | |
738 | - except ValueError: | |
739 | - return | |
740 | - | |
741 | - @property | |
742 | - def avg_time(self): | |
743 | - """ | |
744 | - Calculate the average response time. | |
745 | - """ | |
746 | - try: | |
747 | - return self.total_time / self.receive_count | |
748 | - except ZeroDivisionError: | |
749 | - return | |
750 | - | |
751 | - @property | |
752 | - def variance(self): | |
753 | - """ | |
754 | - Calculate the variance of all roundtrips. | |
755 | - """ | |
756 | - if self.avg_time is None: | |
757 | - return | |
758 | - | |
759 | - var = 0 | |
760 | - | |
761 | - for t in self.times: | |
762 | - var += (t - self.avg_time) ** 2 | |
763 | - | |
764 | - var /= self.receive_count | |
765 | - return var | |
766 | - | |
767 | - @property | |
768 | - def stddev(self): | |
769 | - """ | |
770 | - Standard deviation of all roundtrips. | |
771 | - """ | |
772 | - return math.sqrt(self.variance) | |
773 | - | |
774 | - @property | |
775 | - def loss(self): | |
776 | - """ | |
777 | - Outputs the percentage of dropped packets. | |
778 | - """ | |
779 | - dropped = self.send_count - self.receive_count | |
780 | - | |
781 | - return dropped / self.send_count | |
782 | - | |
783 | - | |
784 | -if __name__ == "__main__": | |
785 | - p = Ping("ping.ipfire.org") | |
786 | - p.run(count=5) | |
787 | - | |
788 | - print("Min/Avg/Max/Stddev: %.2f/%.2f/%.2f/%.2f" % \ | |
789 | - (p.min_time, p.avg_time, p.max_time, p.stddev)) | |
790 | - print("Sent/Recv/Loss: %d/%d/%.2f" % (p.send_count, p.receive_count, p.loss)) | |
791 | diff --git a/src/collecty/plugins/latency.py b/src/collecty/plugins/latency.py | |
792 | index df67102..a219240 100644 | |
793 | --- a/src/collecty/plugins/latency.py | |
794 | +++ b/src/collecty/plugins/latency.py | |
795 | @@ -19,8 +19,9 @@ | |
796 | # # | |
797 | ############################################################################### | |
798 | ||
799 | -import collecty.ping | |
800 | +import socket | |
801 | ||
802 | +import collecty._collecty | |
803 | from . import base | |
804 | ||
805 | from ..i18n import _ | |
806 | @@ -37,86 +38,124 @@ class GraphTemplateLatency(base.GraphTemplate): | |
807 | @property | |
808 | def rrd_graph(self): | |
809 | return [ | |
810 | - "DEF:latency=%(file)s:latency:AVERAGE", | |
811 | - "DEF:latency_loss=%(file)s:latency_loss:AVERAGE", | |
812 | - "DEF:latency_stddev=%(file)s:latency_stddev:AVERAGE", | |
813 | - | |
814 | - # Compute loss in percentage. | |
815 | - "CDEF:latency_ploss=latency_loss,100,*", | |
816 | - | |
817 | - # Compute standard deviation. | |
818 | - "CDEF:stddev1=latency,latency_stddev,+", | |
819 | - "CDEF:stddev2=latency,latency_stddev,-", | |
820 | - | |
821 | - "CDEF:l005=latency_ploss,0,5,LIMIT,UN,UNKN,INF,IF", | |
822 | - "CDEF:l010=latency_ploss,5,10,LIMIT,UN,UNKN,INF,IF", | |
823 | - "CDEF:l025=latency_ploss,10,25,LIMIT,UN,UNKN,INF,IF", | |
824 | - "CDEF:l050=latency_ploss,25,50,LIMIT,UN,UNKN,INF,IF", | |
825 | - "CDEF:l100=latency_ploss,50,100,LIMIT,UN,UNKN,INF,IF", | |
826 | - | |
827 | + "DEF:latency6=%(file)s:latency6:AVERAGE", | |
828 | + "DEF:loss6=%(file)s:loss6:AVERAGE", | |
829 | + "DEF:stddev6=%(file)s:stddev6:AVERAGE", | |
830 | + | |
831 | + "DEF:latency4=%(file)s:latency4:AVERAGE", | |
832 | + "DEF:loss4=%(file)s:loss4:AVERAGE", | |
833 | + "DEF:stddev4=%(file)s:stddev4:AVERAGE", | |
834 | + | |
835 | + # Compute the biggest loss and convert into percentage | |
836 | + "CDEF:ploss=loss6,loss4,MAX,100,*", | |
837 | + | |
838 | + # Compute standard deviation | |
839 | + "CDEF:stddevarea6=stddev6,2,*", | |
840 | + "CDEF:spacer6=latency6,stddev6,-", | |
841 | + "CDEF:stddevarea4=stddev4,2,*", | |
842 | + "CDEF:spacer4=latency4,stddev4,-", | |
843 | + | |
844 | + "CDEF:l005=ploss,0,5,LIMIT,UN,UNKN,INF,IF", | |
845 | + "CDEF:l010=ploss,5,10,LIMIT,UN,UNKN,INF,IF", | |
846 | + "CDEF:l025=ploss,10,25,LIMIT,UN,UNKN,INF,IF", | |
847 | + "CDEF:l050=ploss,25,50,LIMIT,UN,UNKN,INF,IF", | |
848 | + "CDEF:l100=ploss,50,100,LIMIT,UN,UNKN,INF,IF", | |
849 | + | |
850 | + "VDEF:latency6min=latency6,MINIMUM", | |
851 | + "VDEF:latency6max=latency6,MAXIMUM", | |
852 | + "VDEF:latency6avg=latency6,AVERAGE", | |
853 | + "VDEF:latency4min=latency4,MINIMUM", | |
854 | + "VDEF:latency4max=latency4,MAXIMUM", | |
855 | + "VDEF:latency4avg=latency4,AVERAGE", | |
856 | + | |
857 | + "LINE1:latency6avg#00ff0066:%s" % _("Average latency (IPv6)"), | |
858 | + "LINE1:latency4avg#ff000066:%s\\r" % _("Average latency (IPv4)"), | |
859 | + | |
860 | + "COMMENT:%s" % _("Packet Loss"), | |
861 | "AREA:l005#ffffff:%s" % _("0-5%%"), | |
862 | - "AREA:l010#000000:%s" % _("5-10%%"), | |
863 | - "AREA:l025#ff0000:%s" % _("10-25%%"), | |
864 | - "AREA:l050#00ff00:%s" % _("25-50%%"), | |
865 | - "AREA:l100#0000ff:%s" % _("50-100%%") + "\\n", | |
866 | - | |
867 | - "LINE1:stddev1#00660088", | |
868 | - "LINE1:stddev2#00660088", | |
869 | - | |
870 | - "LINE3:latency#ff0000:%s" % _("Latency"), | |
871 | - "VDEF:latencymin=latency,MINIMUM", | |
872 | - "VDEF:latencymax=latency,MAXIMUM", | |
873 | - "VDEF:latencyavg=latency,AVERAGE", | |
874 | - "GPRINT:latencymax:%12s\:" % _("Maximum") + " %6.2lf", | |
875 | - "GPRINT:latencymin:%12s\:" % _("Minimum") + " %6.2lf", | |
876 | - "GPRINT:latencyavg:%12s\:" % _("Average") + " %6.2lf\\n", | |
877 | - | |
878 | - "LINE1:latencyavg#000000:%s" % _("Average latency"), | |
879 | + "AREA:l010#cccccc:%s" % _("5-10%%"), | |
880 | + "AREA:l025#999999:%s" % _("10-25%%"), | |
881 | + "AREA:l050#666666:%s" % _("25-50%%"), | |
882 | + "AREA:l100#333333:%s" % _("50-100%%") + "\\r", | |
883 | + | |
884 | + "COMMENT: \\n", # empty line | |
885 | + | |
886 | + "AREA:spacer4", | |
887 | + "AREA:stddevarea4#ff000033:STACK", | |
888 | + "LINE2:latency4#ff0000:%s" % _("Latency (IPv4)"), | |
889 | + "GPRINT:latency4max:%12s\:" % _("Maximum") + " %6.2lf", | |
890 | + "GPRINT:latency4min:%12s\:" % _("Minimum") + " %6.2lf", | |
891 | + "GPRINT:latency4avg:%12s\:" % _("Average") + " %6.2lf\\n", | |
892 | + | |
893 | + "AREA:spacer6", | |
894 | + "AREA:stddevarea6#00ff0033:STACK", | |
895 | + "LINE2:latency6#00ff00:%s" % _("Latency (IPv6)"), | |
896 | + "GPRINT:latency6max:%12s\:" % _("Maximum") + " %6.2lf", | |
897 | + "GPRINT:latency6min:%12s\:" % _("Minimum") + " %6.2lf", | |
898 | + "GPRINT:latency6avg:%12s\:" % _("Average") + " %6.2lf\\n", | |
899 | ] | |
900 | ||
901 | @property | |
902 | def graph_title(self): | |
903 | - return _("Latency to %(host)s") | |
904 | + return _("Latency to %s") % self.object.hostname | |
905 | ||
906 | @property | |
907 | def graph_vertical_label(self): | |
908 | return _("Milliseconds") | |
909 | ||
910 | + @property | |
911 | + def rrd_graph_args(self): | |
912 | + return [ | |
913 | + "--legend-direction=bottomup", | |
914 | + ] | |
915 | + | |
916 | ||
917 | class LatencyObject(base.Object): | |
918 | rrd_schema = [ | |
919 | - "DS:latency:GAUGE:0:U", | |
920 | - "DS:latency_loss:GAUGE:0:100", | |
921 | - "DS:latency_stddev:GAUGE:0:U", | |
922 | + "DS:latency6:GAUGE:0:U", | |
923 | + "DS:stddev6:GAUGE:0:U", | |
924 | + "DS:loss6:GAUGE:0:100", | |
925 | + "DS:latency4:GAUGE:0:U", | |
926 | + "DS:stddev4:GAUGE:0:U", | |
927 | + "DS:loss4:GAUGE:0:100", | |
928 | ] | |
929 | ||
930 | def __repr__(self): | |
931 | return "<%s %s>" % (self.__class__.__name__, self.hostname) | |
932 | ||
933 | - def init(self, hostname, deadline=None): | |
934 | + def init(self, hostname): | |
935 | self.hostname = hostname | |
936 | - self.deadline = deadline | |
937 | ||
938 | @property | |
939 | def id(self): | |
940 | return self.hostname | |
941 | ||
942 | def collect(self): | |
943 | - # Send up to five ICMP echo requests. | |
944 | - try: | |
945 | - ping = collecty.ping.Ping(destination=self.hostname, timeout=20000) | |
946 | - ping.run(count=5, deadline=self.deadline) | |
947 | + result = [] | |
948 | + | |
949 | + for family in (socket.AF_INET6, socket.AF_INET): | |
950 | + try: | |
951 | + p = collecty._collecty.Ping(self.hostname, family=family) | |
952 | + p.ping(count=5, deadline=10) | |
953 | + | |
954 | + result += (p.average, p.stddev, p.loss) | |
955 | + | |
956 | + except collecty._collecty.PingAddHostError as e: | |
957 | + self.log.debug(_("Could not add host %(host)s for family %(family)s") \ | |
958 | + % { "host" : self.hostname, "family" : family }) | |
959 | ||
960 | - except collecty.ping.PingError as e: | |
961 | - self.log.warning(_("Could not run latency check for %(host)s: %(msg)s") \ | |
962 | - % { "host" : self.hostname, "msg" : e.msg }) | |
963 | - return | |
964 | + # No data available | |
965 | + result += (None, None, None) | |
966 | + continue | |
967 | ||
968 | - return ( | |
969 | - "%.10f" % ping.avg_time, | |
970 | - "%.10f" % ping.loss, | |
971 | - "%.10f" % ping.stddev, | |
972 | - ) | |
973 | + except collecty._collecty.PingError as e: | |
974 | + self.log.warning(_("Could not run latency check for %(host)s: %(msg)s") \ | |
975 | + % { "host" : self.hostname, "msg" : e }) | |
976 | + | |
977 | + # A hundred percent loss | |
978 | + result += (None, None, 1) | |
979 | + | |
980 | + return result | |
981 | ||
982 | ||
983 | class LatencyPlugin(base.Plugin): | |
984 | @@ -127,7 +166,5 @@ class LatencyPlugin(base.Plugin): | |
985 | ||
986 | @property | |
987 | def objects(self): | |
988 | - deadline = self.interval / len(PING_HOSTS) | |
989 | - | |
990 | for hostname in PING_HOSTS: | |
991 | - yield LatencyObject(self, hostname, deadline=deadline) | |
992 | + yield LatencyObject(self, hostname) | |
993 | -- | |
994 | 1.8.1 | |
995 |