1 /*
2 * collectd - src/apcups.c
3 * Copyright (C) 2006 Anthony Gialluca <tonyabg at charter.net>
4 * Copyright (C) 2000-2004 Kern Sibbald
5 * Copyright (C) 1996-99 Andre M. Hedrick <andre at suse.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of version 2 of the GNU General
9 * Public License as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public
17 * License along with this program; if not, write to the Free
18 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
19 * MA 02111-1307, USA.
20 *
21 * Authors:
22 * Anthony Gialluca <tonyabg at charter.net>
23 **/
25 /*
26 * FIXME: Don't know why but without this here atof() was not returning
27 * correct values for me. This is behavior that I don't understand and
28 * should be examined in closer detail.
29 */
30 #include <stdlib.h>
32 #include "collectd.h"
33 #include "common.h" /* rrd_update_file */
34 #include "plugin.h" /* plugin_register, plugin_submit */
35 #include "configfile.h" /* cf_register */
36 #include "utils_debug.h"
38 #if HAVE_SYS_TYPES_H
39 # include <sys/types.h>
40 #endif
41 #if HAVE_SYS_SOCKET_H
42 # include <sys/socket.h>
43 #endif
44 #if HAVE_NETDB_H
45 # include <netdb.h>
46 #endif
48 #if HAVE_NETINET_IN_H
49 # include <netinet/in.h>
50 #endif
52 #ifndef APCMAIN
53 # define APCMAIN 0
54 #endif
56 #define NISPORT 3551
57 #define MAXSTRING 256
58 #define MODULE_NAME "apcups"
60 #define APCUPS_DEFAULT_HOST "localhost"
62 /* Default values for contacting daemon */
63 static char *global_host = NULL;
64 static int global_port = NISPORT;
66 /*
67 * The following are only if not compiled to test the module with its own main.
68 */
69 #if !APCMAIN
70 static char *bvolt_file_template = "apcups/voltage-%s.rrd";
71 static char *bvolt_ds_def[] =
72 {
73 "DS:voltage:GAUGE:"COLLECTD_HEARTBEAT":0:U",
74 };
75 static int bvolt_ds_num = 1;
77 static char *load_file_template = "apcups/load_percent.rrd";
78 static char *load_ds_def[] =
79 {
80 "DS:percent:GAUGE:"COLLECTD_HEARTBEAT":0:110",
81 };
82 static int load_ds_num = 1;
84 static char *charge_file_template = "apcups/charge_percent.rrd";
85 static char *charge_ds_def[] =
86 {
87 "DS:percent:GAUGE:"COLLECTD_HEARTBEAT":0:110",
88 };
89 static int charge_ds_num = 1;
91 static char *time_file_template = "apcups/timeleft.rrd";
92 static char *time_ds_def[] =
93 {
94 "DS:timeleft:GAUGE:"COLLECTD_HEARTBEAT":0:100",
95 };
96 static int time_ds_num = 1;
98 static char *temp_file_template = "apcups/temperature.rrd";
99 static char *temp_ds_def[] =
100 {
101 /* -273.15 is absolute zero */
102 "DS:value:GAUGE:"COLLECTD_HEARTBEAT":-274:U",
103 };
104 static int temp_ds_num = 1;
106 static char *freq_file_template = "apcups/frequency-%s.rrd";
107 static char *freq_ds_def[] =
108 {
109 "DS:frequency:GAUGE:"COLLECTD_HEARTBEAT":0:U",
110 };
111 static int freq_ds_num = 1;
113 static char *config_keys[] =
114 {
115 "Host",
116 "Port",
117 NULL
118 };
119 static int config_keys_num = 2;
121 #endif /* if APCMAIN */
123 struct apc_detail_s
124 {
125 double linev;
126 double loadpct;
127 double bcharge;
128 double timeleft;
129 double outputv;
130 double itemp;
131 double battv;
132 double linefreq;
133 };
135 #define BIG_BUF 4096
137 #if APCMAIN
138 /* Close the network connection */
139 static void net_close (int *fd)
140 {
141 uint16_t packet_size = 0;
143 assert (*fd >= 0);
145 DBG ("Gracefully shutting down socket %i.", *fd);
147 /* send EOF sentinel */
148 swrite (*fd, (void *) &packet_size, sizeof (packet_size));
150 close (*fd);
151 *fd = -1;
152 }
153 #endif /* APCMAIN */
155 /*
156 * Open a TCP connection to the UPS network server
157 * Returns -1 on error
158 * Returns socket file descriptor otherwise
159 */
160 static int net_open (char *host, char *service, int port)
161 {
162 int sd;
163 int status;
164 char port_str[8];
165 struct addrinfo ai_hints;
166 struct addrinfo *ai_return;
167 struct addrinfo *ai_list;
169 assert ((port > 0x00000000) && (port <= 0x0000FFFF));
171 /* Convert the port to a string */
172 snprintf (port_str, 8, "%i", port);
173 port_str[7] = '\0';
175 /* Resolve name */
176 memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
177 ai_hints.ai_family = AF_INET; /* XXX: Change this to `AF_UNSPEC' if apcupsd can handle IPv6 */
178 ai_hints.ai_socktype = SOCK_STREAM;
180 status = getaddrinfo (host, port_str, &ai_hints, &ai_return);
181 if (status != 0)
182 {
183 DBG ("getaddrinfo failed: %s", status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status));
184 return (-1);
185 }
187 /* Create socket */
188 sd = -1;
189 for (ai_list = ai_return; ai_list != NULL; ai_list = ai_list->ai_next)
190 {
191 sd = socket (ai_list->ai_family, ai_list->ai_socktype, ai_list->ai_protocol);
192 if (sd >= 0)
193 break;
194 }
195 /* `ai_list' still holds the current description of the socket.. */
197 if (sd < 0)
198 {
199 DBG ("Unable to open a socket");
200 freeaddrinfo (ai_return);
201 return (-1);
202 }
204 status = connect (sd, ai_list->ai_addr, ai_list->ai_addrlen);
206 freeaddrinfo (ai_return);
208 if (status != 0) /* `connect(2)' failed */
209 {
210 DBG ("connect failed: %s", strerror (errno));
211 close (sd);
212 return (-1);
213 }
215 DBG ("Done opening a socket %i", sd);
217 return (sd);
218 } /* int net_open (char *host, char *service, int port) */
220 /*
221 * Receive a message from the other end. Each message consists of
222 * two packets. The first is a header that contains the size
223 * of the data that follows in the second packet.
224 * Returns number of bytes read
225 * Returns 0 on end of file
226 * Returns -1 on hard end of file (i.e. network connection close)
227 * Returns -2 on error
228 */
229 static int net_recv (int *sockfd, char *buf, int buflen)
230 {
231 uint16_t packet_size;
233 /* get data size -- in short */
234 if (sread (*sockfd, (void *) &packet_size, sizeof (packet_size)) != 0)
235 {
236 *sockfd = -1;
237 return (-1);
238 }
240 packet_size = ntohs (packet_size);
241 if (packet_size > buflen)
242 {
243 DBG ("record length too large");
244 return (-2);
245 }
247 if (packet_size == 0)
248 return (0);
250 /* now read the actual data */
251 if (sread (*sockfd, (void *) buf, packet_size) != 0)
252 {
253 *sockfd = -1;
254 return (-1);
255 }
257 return ((int) packet_size);
258 } /* static int net_recv (int *sockfd, char *buf, int buflen) */
260 /*
261 * Send a message over the network. The send consists of
262 * two network packets. The first is sends a short containing
263 * the length of the data packet which follows.
264 * Returns zero on success
265 * Returns non-zero on error
266 */
267 static int net_send (int *sockfd, char *buff, int len)
268 {
269 uint16_t packet_size;
271 assert (len > 0);
272 assert (*sockfd >= 0);
274 /* send short containing size of data packet */
275 packet_size = htons ((uint16_t) len);
277 if (swrite (*sockfd, (void *) &packet_size, sizeof (packet_size)) != 0)
278 {
279 *sockfd = -1;
280 return (-1);
281 }
283 /* send data packet */
284 if (swrite (*sockfd, (void *) buff, len) != 0)
285 {
286 *sockfd = -1;
287 return (-2);
288 }
290 return (0);
291 }
293 /* Get and print status from apcupsd NIS server */
294 static int apc_query_server (char *host, int port,
295 struct apc_detail_s *apcups_detail)
296 {
297 int n;
298 char recvline[1024];
299 char *tokptr;
300 char *key;
301 double value;
303 static int sockfd = -1;
304 static complain_t compl;
306 #if APCMAIN
307 # define PRINT_VALUE(name, val) printf(" Found property: name = %s; value = %f;\n", name, val)
308 #else
309 # define PRINT_VALUE(name, val) /**/
310 #endif
312 if (sockfd < 0)
313 {
314 if ((sockfd = net_open (host, NULL, port)) < 0)
315 {
316 plugin_complain (LOG_ERR, &compl, "apcups plugin: "
317 "Connecting to the apcupsd failed.");
318 return (-1);
319 }
320 else
321 {
322 plugin_relief (LOG_NOTICE, &compl, "apcups plugin: "
323 "Connection re-established to the apcupsd.");
324 }
325 }
327 if (net_send (&sockfd, "status", 6) < 0)
328 {
329 syslog (LOG_ERR, "apcups plugin: Writing to the socket failed.");
330 return (-1);
331 }
333 while ((n = net_recv (&sockfd, recvline, sizeof (recvline) - 1)) > 0)
334 {
335 assert (n < sizeof (recvline));
336 recvline[n] = '\0';
337 #if APCMAIN
338 printf ("net_recv = `%s';\n", recvline);
339 #endif /* if APCMAIN */
341 tokptr = strtok (recvline, " :\t");
342 while (tokptr != NULL)
343 {
344 key = tokptr;
345 if ((tokptr = strtok (NULL, " :\t")) == NULL)
346 continue;
347 value = atof (tokptr);
349 PRINT_VALUE (key, value);
351 if (strcmp ("LINEV", key) == 0)
352 apcups_detail->linev = value;
353 else if (strcmp ("BATTV", key) == 0)
354 apcups_detail->battv = value;
355 else if (strcmp ("ITEMP", key) == 0)
356 apcups_detail->itemp = value;
357 else if (strcmp ("LOADPCT", key) == 0)
358 apcups_detail->loadpct = value;
359 else if (strcmp ("BCHARGE", key) == 0)
360 apcups_detail->bcharge = value;
361 else if (strcmp ("OUTPUTV", key) == 0)
362 apcups_detail->outputv = value;
363 else if (strcmp ("LINEFREQ", key) == 0)
364 apcups_detail->linefreq = value;
365 else if (strcmp ("TIMELEFT", key) == 0)
366 apcups_detail->timeleft = value;
368 tokptr = strtok (NULL, ":");
369 } /* while (tokptr != NULL) */
370 }
372 if (n < 0)
373 {
374 syslog (LOG_WARNING, "apcups plugin: Error reading from socket");
375 return (-1);
376 }
377 #if APCMAIN
378 else
379 {
380 /* close the opened socket */
381 net_close (&sockfd);
382 }
383 #endif /* APCMAIN */
385 return (0);
386 }
388 #if APCMAIN
389 /*
390 * This is used for testing apcups in a standalone mode.
391 * Usefull for debugging.
392 */
393 int main (int argc, char **argv)
394 {
395 /* we are not really going to use this */
396 struct apc_detail_s apcups_detail;
398 openlog ("apcups", LOG_PID | LOG_NDELAY | LOG_LOCAL1, LOG_USER);
400 if (global_host == NULL || strcmp (global_host, "0.0.0.0") == 0)
401 global_host = "localhost";
403 if(apc_query_server (global_host, global_port, &apcups_detail) < 0)
404 {
405 printf("apcups: Failed...\n");
406 return(-1);
407 }
409 return 0;
410 }
411 #else
412 static int apcups_config (char *key, char *value)
413 {
414 if (strcasecmp (key, "host") == 0)
415 {
416 if (global_host != NULL)
417 {
418 free (global_host);
419 global_host = NULL;
420 }
421 if ((global_host = strdup (value)) == NULL)
422 return (1);
423 }
424 else if (strcasecmp (key, "Port") == 0)
425 {
426 int port_tmp = atoi (value);
427 if (port_tmp < 1 || port_tmp > 65535)
428 {
429 syslog (LOG_WARNING, "apcups plugin: Invalid port: %i", port_tmp);
430 return (1);
431 }
432 global_port = port_tmp;
433 }
434 else
435 {
436 return (-1);
437 }
438 return (0);
439 }
441 static void apcups_init (void)
442 {
443 return;
444 }
446 static void apc_write_voltage (char *host, char *inst, char *val)
447 {
448 char file[512];
449 int status;
451 status = snprintf (file, 512, bvolt_file_template, inst);
452 if ((status < 1) || (status >= 512))
453 return;
455 rrd_update_file (host, file, val, bvolt_ds_def, bvolt_ds_num);
456 }
458 static void apc_write_charge (char *host, char *inst, char *val)
459 {
460 rrd_update_file (host, charge_file_template, val, charge_ds_def, charge_ds_num);
461 }
463 static void apc_write_percent (char *host, char *inst, char *val)
464 {
465 rrd_update_file (host, load_file_template, val, load_ds_def, load_ds_num);
466 }
468 static void apc_write_timeleft (char *host, char *inst, char *val)
469 {
470 rrd_update_file (host, time_file_template, val, time_ds_def, time_ds_num);
471 }
473 static void apc_write_temperature (char *host, char *inst, char *val)
474 {
475 rrd_update_file (host, temp_file_template, val, temp_ds_def, temp_ds_num);
476 }
478 static void apc_write_frequency (char *host, char *inst, char *val)
479 {
480 char file[512];
481 int status;
483 status = snprintf (file, 512, freq_file_template, inst);
484 if ((status < 1) || (status >= 512))
485 return;
487 rrd_update_file (host, file, val, freq_ds_def, freq_ds_num);
488 }
490 static void apc_submit_generic (char *type, char *inst,
491 double value)
492 {
493 char buf[512];
494 int status;
496 status = snprintf (buf, 512, "%u:%f",
497 (unsigned int) curtime, value);
498 if ((status < 1) || (status >= 512))
499 return;
501 DBG ("plugin_submit (%s, %s, %s);", type, inst, buf);
502 plugin_submit (type, inst, buf);
503 }
505 static void apc_submit (struct apc_detail_s *apcups_detail)
506 {
507 apc_submit_generic ("apcups_voltage", "input", apcups_detail->linev);
508 apc_submit_generic ("apcups_voltage", "output", apcups_detail->outputv);
509 apc_submit_generic ("apcups_voltage", "battery", apcups_detail->battv);
510 apc_submit_generic ("apcups_charge", "-", apcups_detail->bcharge);
511 apc_submit_generic ("apcups_charge_pct", "-", apcups_detail->loadpct);
512 apc_submit_generic ("apcups_timeleft", "-", apcups_detail->timeleft);
513 apc_submit_generic ("apcups_temp", "-", apcups_detail->itemp);
514 apc_submit_generic ("apcups_frequency", "input", apcups_detail->linefreq);
515 }
517 static void apcups_read (void)
518 {
519 struct apc_detail_s apcups_detail;
520 int status;
522 apcups_detail.linev = -1.0;
523 apcups_detail.outputv = -1.0;
524 apcups_detail.battv = -1.0;
525 apcups_detail.loadpct = -1.0;
526 apcups_detail.bcharge = -1.0;
527 apcups_detail.timeleft = -1.0;
528 apcups_detail.itemp = -300.0;
529 apcups_detail.linefreq = -1.0;
531 status = apc_query_server (global_host == NULL
532 ? APCUPS_DEFAULT_HOST
533 : global_host,
534 global_port, &apcups_detail);
536 /*
537 * if we did not connect then do not bother submitting
538 * zeros. We want rrd files to have NAN.
539 */
540 if (status != 0)
541 {
542 DBG ("apc_query_server (%s, %i) = %i",
543 global_host == NULL
544 ? APCUPS_DEFAULT_HOST
545 : global_host,
546 global_port, status);
547 return;
548 }
550 apc_submit (&apcups_detail);
551 } /* apcups_read */
553 void module_register (void)
554 {
555 plugin_register (MODULE_NAME, apcups_init, apcups_read, NULL);
556 plugin_register ("apcups_voltage", NULL, NULL, apc_write_voltage);
557 plugin_register ("apcups_charge", NULL, NULL, apc_write_charge);
558 plugin_register ("apcups_charge_pct", NULL, NULL, apc_write_percent);
559 plugin_register ("apcups_timeleft", NULL, NULL, apc_write_timeleft);
560 plugin_register ("apcups_temp", NULL, NULL, apc_write_temperature);
561 plugin_register ("apcups_frequency", NULL, NULL, apc_write_frequency);
562 cf_register (MODULE_NAME, apcups_config, config_keys, config_keys_num);
563 }
565 #endif /* if APCMAIN */
566 #undef MODULE_NAME