1 /**
2 * collectd - src/interface.c
3 * Copyright (C) 2005-2007 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 * Sune Marcher <sm at flork.dk>
21 **/
23 #include "collectd.h"
24 #include "common.h"
25 #include "plugin.h"
26 #include "configfile.h"
28 #if HAVE_SYS_TYPES_H
29 # include <sys/types.h>
30 #endif
31 #if HAVE_SYS_SOCKET_H
32 # include <sys/socket.h>
33 #endif
35 /* One cannot include both. This sucks. */
36 #if HAVE_LINUX_IF_H
37 # include <linux/if.h>
38 #elif HAVE_NET_IF_H
39 # include <net/if.h>
40 #endif
42 #if HAVE_LINUX_NETDEVICE_H
43 # include <linux/netdevice.h>
44 #endif
45 #if HAVE_IFADDRS_H
46 # include <ifaddrs.h>
47 #endif
49 /*
50 * Various people have reported problems with `getifaddrs' and varying versions
51 * of `glibc'. That's why it's disabled by default. Since more statistics are
52 * available this way one may enable it using the `--enable-getifaddrs' option
53 * of the configure script. -octo
54 */
55 #if KERNEL_LINUX
56 # if !COLLECT_GETIFADDRS
57 # undef HAVE_GETIFADDRS
58 # endif /* !COLLECT_GETIFADDRS */
59 #endif /* KERNEL_LINUX */
61 #if !HAVE_GETIFADDRS && !KERNEL_LINUX && !HAVE_LIBKSTAT && !HAVE_LIBSTATGRAB
62 # error "No applicable input method."
63 #endif
65 /*
66 * (Module-)Global variables
67 */
68 static const char *config_keys[] =
69 {
70 "Interface",
71 "IgnoreSelected",
72 NULL
73 };
74 static int config_keys_num = 2;
76 static char **if_list = NULL;
77 static int if_list_num = 0;
78 /*
79 * if_list_action:
80 * 0 => default is to collect selected interface
81 * 1 => ignore selcted interfaces
82 */
83 static int if_list_action = 0;
85 #ifdef HAVE_LIBKSTAT
86 #define MAX_NUMIF 256
87 extern kstat_ctl_t *kc;
88 static kstat_t *ksp[MAX_NUMIF];
89 static int numif = 0;
90 #endif /* HAVE_LIBKSTAT */
92 static int interface_config (const char *key, const char *value)
93 {
94 char **temp;
96 if (strcasecmp (key, "Interface") == 0)
97 {
98 temp = (char **) realloc (if_list, (if_list_num + 1) * sizeof (char *));
99 if (temp == NULL)
100 {
101 ERROR ("Cannot allocate more memory.");
102 return (1);
103 }
104 if_list = temp;
106 if ((if_list[if_list_num] = strdup (value)) == NULL)
107 {
108 ERROR ("Cannot allocate memory.");
109 return (1);
110 }
111 if_list_num++;
112 }
113 else if (strcasecmp (key, "IgnoreSelected") == 0)
114 {
115 if ((strcasecmp (value, "True") == 0)
116 || (strcasecmp (value, "Yes") == 0)
117 || (strcasecmp (value, "On") == 0))
118 if_list_action = 1;
119 else
120 if_list_action = 0;
121 }
122 else
123 {
124 return (-1);
125 }
127 return (0);
128 }
130 #if HAVE_LIBKSTAT
131 static int interface_init (void)
132 {
133 kstat_t *ksp_chain;
134 unsigned long long val;
136 numif = 0;
138 if (kc == NULL)
139 return (-1);
141 for (numif = 0, ksp_chain = kc->kc_chain;
142 (numif < MAX_NUMIF) && (ksp_chain != NULL);
143 ksp_chain = ksp_chain->ks_next)
144 {
145 if (strncmp (ksp_chain->ks_class, "net", 3))
146 continue;
147 if (ksp_chain->ks_type != KSTAT_TYPE_NAMED)
148 continue;
149 if (kstat_read (kc, ksp_chain, NULL) == -1)
150 continue;
151 if ((val = get_kstat_value (ksp_chain, "obytes")) == -1LL)
152 continue;
153 ksp[numif++] = ksp_chain;
154 }
156 return (0);
157 } /* int interface_init */
158 #endif /* HAVE_LIBKSTAT */
160 /*
161 * Check if this interface/instance should be ignored. This is called from
162 * both, `submit' and `write' to give client and server the ability to
163 * ignore certain stuff..
164 */
165 static int check_ignore_if (const char *interface)
166 {
167 int i;
169 /* If no interfaces are given collect all interfaces. Mostly to be
170 * backwards compatible, but also because this is much easier. */
171 if (if_list_num < 1)
172 return (0);
174 for (i = 0; i < if_list_num; i++)
175 if (strcasecmp (interface, if_list[i]) == 0)
176 return (if_list_action);
177 return (1 - if_list_action);
178 } /* int check_ignore_if */
180 static void if_submit (const char *dev, const char *type,
181 unsigned long long rx,
182 unsigned long long tx)
183 {
184 value_t values[2];
185 value_list_t vl = VALUE_LIST_INIT;
187 if (check_ignore_if (dev))
188 return;
190 values[0].counter = rx;
191 values[1].counter = tx;
193 vl.values = values;
194 vl.values_len = 2;
195 vl.time = time (NULL);
196 strcpy (vl.host, hostname_g);
197 strcpy (vl.plugin, "interface");
198 sstrncpy (vl.type, type, sizeof (vl.type));
199 sstrncpy (vl.type_instance, dev, sizeof (vl.type_instance));
201 plugin_dispatch_values (&vl);
202 } /* void if_submit */
204 static int interface_read (void)
205 {
206 #if HAVE_GETIFADDRS
207 struct ifaddrs *if_list;
208 struct ifaddrs *if_ptr;
210 /* Darin/Mac OS X and possible other *BSDs */
211 #if HAVE_STRUCT_IF_DATA
212 # define IFA_DATA if_data
213 # define IFA_RX_BYTES ifi_ibytes
214 # define IFA_TX_BYTES ifi_obytes
215 # define IFA_RX_PACKT ifi_ipackets
216 # define IFA_TX_PACKT ifi_opackets
217 # define IFA_RX_ERROR ifi_ierrors
218 # define IFA_TX_ERROR ifi_oerrors
219 /* #endif HAVE_STRUCT_IF_DATA */
221 #elif HAVE_STRUCT_NET_DEVICE_STATS
222 # define IFA_DATA net_device_stats
223 # define IFA_RX_BYTES rx_bytes
224 # define IFA_TX_BYTES tx_bytes
225 # define IFA_RX_PACKT rx_packets
226 # define IFA_TX_PACKT tx_packets
227 # define IFA_RX_ERROR rx_errors
228 # define IFA_TX_ERROR tx_errors
229 #else
230 # error "No suitable type for `struct ifaddrs->ifa_data' found."
231 #endif
233 struct IFA_DATA *if_data;
235 if (getifaddrs (&if_list) != 0)
236 return (-1);
238 for (if_ptr = if_list; if_ptr != NULL; if_ptr = if_ptr->ifa_next)
239 {
240 if ((if_data = (struct IFA_DATA *) if_ptr->ifa_data) == NULL)
241 continue;
243 if_submit (if_ptr->ifa_name, "if_octets",
244 if_data->IFA_RX_BYTES,
245 if_data->IFA_TX_BYTES);
246 if_submit (if_ptr->ifa_name, "if_packets",
247 if_data->IFA_RX_PACKT,
248 if_data->IFA_TX_PACKT);
249 if_submit (if_ptr->ifa_name, "if_errors",
250 if_data->IFA_RX_ERROR,
251 if_data->IFA_TX_ERROR);
252 }
254 freeifaddrs (if_list);
255 /* #endif HAVE_GETIFADDRS */
257 #elif KERNEL_LINUX
258 FILE *fh;
259 char buffer[1024];
260 unsigned long long incoming, outgoing;
261 char *device;
263 char *dummy;
264 char *fields[16];
265 int numfields;
267 if ((fh = fopen ("/proc/net/dev", "r")) == NULL)
268 {
269 char errbuf[1024];
270 WARNING ("interface plugin: fopen: %s",
271 sstrerror (errno, errbuf, sizeof (errbuf)));
272 return (-1);
273 }
275 while (fgets (buffer, 1024, fh) != NULL)
276 {
277 if (!(dummy = strchr(buffer, ':')))
278 continue;
279 dummy[0] = '\0';
280 dummy++;
282 device = buffer;
283 while (device[0] == ' ')
284 device++;
286 if (device[0] == '\0')
287 continue;
289 numfields = strsplit (dummy, fields, 16);
291 if (numfields < 11)
292 continue;
294 incoming = atoll (fields[0]);
295 outgoing = atoll (fields[8]);
296 if_submit (device, "if_octets", incoming, outgoing);
298 incoming = atoll (fields[1]);
299 outgoing = atoll (fields[9]);
300 if_submit (device, "if_packets", incoming, outgoing);
302 incoming = atoll (fields[2]);
303 outgoing = atoll (fields[10]);
304 if_submit (device, "if_errors", incoming, outgoing);
305 }
307 fclose (fh);
308 /* #endif KERNEL_LINUX */
310 #elif HAVE_LIBKSTAT
311 int i;
312 unsigned long long rx;
313 unsigned long long tx;
315 if (kc == NULL)
316 return (-1);
318 for (i = 0; i < numif; i++)
319 {
320 if (kstat_read (kc, ksp[i], NULL) == -1)
321 continue;
323 rx = get_kstat_value (ksp[i], "rbytes");
324 tx = get_kstat_value (ksp[i], "obytes");
325 if ((rx != -1LL) || (tx != -1LL))
326 if_submit (ksp[i]->ks_name, "if_octets", rx, tx);
328 rx = get_kstat_value (ksp[i], "ipackets");
329 tx = get_kstat_value (ksp[i], "opackets");
330 if ((rx != -1LL) || (tx != -1LL))
331 if_submit (ksp[i]->ks_name, "if_packets", rx, tx);
333 rx = get_kstat_value (ksp[i], "ierrors");
334 tx = get_kstat_value (ksp[i], "oerrors");
335 if ((rx != -1LL) || (tx != -1LL))
336 if_submit (ksp[i]->ks_name, "if_errors", rx, tx);
337 }
338 /* #endif HAVE_LIBKSTAT */
340 #elif defined(HAVE_LIBSTATGRAB)
341 sg_network_io_stats *ios;
342 int i, num;
344 ios = sg_get_network_io_stats (&num);
346 for (i = 0; i < num; i++)
347 if_submit (ios[i].interface_name, "if_octets", ios[i].rx, ios[i].tx);
348 #endif /* HAVE_LIBSTATGRAB */
350 return (0);
351 } /* int interface_read */
353 void module_register (void)
354 {
355 plugin_register_config ("interface", interface_config,
356 config_keys, config_keys_num);
357 #if HAVE_LIBKSTAT
358 plugin_register_init ("interface", interface_init);
359 #endif
360 plugin_register_read ("interface", interface_read);
361 } /* void module_register */