/**
* collectd - src/dns.c
- * Copyright (C) 2006,2007 Florian octo Forster
+ * Copyright (C) 2006-2011 Florian octo Forster
+ * Copyright (C) 2009 Mirko Buffoni
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
- * Florian octo Forster <octo at verplant.org>
+ * Florian octo Forster <octo at collectd.org>
+ * Mirko Buffoni <briareos at eswat.org>
**/
+#define _BSD_SOURCE
+
#include "collectd.h"
#include "common.h"
#include "plugin.h"
#include "configfile.h"
-#if HAVE_LIBPCAP && HAVE_LIBPTHREAD
-# include "utils_dns.h"
-# include <pthread.h>
-# include <pcap.h>
-# include <poll.h>
-# define DNS_HAVE_READ 1
-#else
-# define DNS_HAVE_READ 0
+#include "utils_dns.h"
+#include <pthread.h>
+#include <poll.h>
+
+#include <pcap.h>
+#if HAVE_PCAP_BPF_H
+# include <pcap-bpf.h>
#endif
/*
* Private data types
*/
-#if DNS_HAVE_READ
struct counter_list_s
{
unsigned int key;
struct counter_list_s *next;
};
typedef struct counter_list_s counter_list_t;
-#endif
/*
* Private variables
*/
-#if DNS_HAVE_READ
static const char *config_keys[] =
{
"Interface",
"IgnoreSource",
- NULL
+ "SelectNumericQueryTypes"
};
-static int config_keys_num = 2;
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+static int select_numeric_qtype = 1;
#define PCAP_SNAPLEN 1460
static char *pcap_device = NULL;
static pthread_mutex_t qtype_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t opcode_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t rcode_mutex = PTHREAD_MUTEX_INITIALIZER;
-#endif /* DNS_HAVE_READ */
/*
* Private functions
*/
-#if DNS_HAVE_READ
static counter_list_t *counter_list_search (counter_list_t **list, unsigned int key)
{
counter_list_t *entry;
if (value != NULL)
ignore_list_add_name (value);
}
+ else if (strcasecmp (key, "SelectNumericQueryTypes") == 0)
+ {
+ if ((value != NULL) && IS_FALSE (value))
+ select_numeric_qtype = 0;
+ else
+ select_numeric_qtype = 1;
+ }
else
{
return (-1);
if (dns->qr == 0)
{
/* This is a query */
+ int skip = 0;
+ if (!select_numeric_qtype)
+ {
+ const char *str = qtype_str(dns->qtype);
+ if ((str == NULL) || (str[0] == '#'))
+ skip = 1;
+ }
+
pthread_mutex_lock (&traffic_mutex);
tr_queries += dns->length;
pthread_mutex_unlock (&traffic_mutex);
- pthread_mutex_lock (&qtype_mutex);
- counter_list_add (&qtype_list, dns->qtype, 1);
- pthread_mutex_unlock (&qtype_mutex);
+ if (skip == 0)
+ {
+ pthread_mutex_lock (&qtype_mutex);
+ counter_list_add (&qtype_list, dns->qtype, 1);
+ pthread_mutex_unlock (&qtype_mutex);
+ }
}
else
{
pthread_mutex_unlock (&opcode_mutex);
}
-static void *dns_child_loop (void *dummy)
+static void *dns_child_loop (__attribute__((unused)) void *dummy)
{
pcap_t *pcap_obj;
char pcap_error[PCAP_ERRBUF_SIZE];
}
/* Passing `pcap_device == NULL' is okay and the same as passign "any" */
- DEBUG ("Creating PCAP object..");
- pcap_obj = pcap_open_live (pcap_device,
+ DEBUG ("dns plugin: Creating PCAP object..");
+ pcap_obj = pcap_open_live ((pcap_device != NULL) ? pcap_device : "any",
PCAP_SNAPLEN,
0 /* Not promiscuous */,
interval_g,
memset (&fp, 0, sizeof (fp));
if (pcap_compile (pcap_obj, &fp, "udp port 53", 1, 0) < 0)
{
- DEBUG ("pcap_compile failed");
ERROR ("dns plugin: pcap_compile failed");
return (NULL);
}
if (pcap_setfilter (pcap_obj, &fp) < 0)
{
- DEBUG ("pcap_setfilter failed");
ERROR ("dns plugin: pcap_setfilter failed");
return (NULL);
}
vl.values = values;
vl.values_len = 1;
- vl.time = time (NULL);
- strcpy (vl.host, hostname_g);
- strcpy (vl.plugin, "dns");
- strncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "dns", sizeof (vl.plugin));
+ sstrncpy (vl.type, type, sizeof (vl.type));
+ sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
- plugin_dispatch_values (type, &vl);
+ plugin_dispatch_values (&vl);
} /* void submit_counter */
static void submit_octets (counter_t queries, counter_t responses)
vl.values = values;
vl.values_len = 2;
- vl.time = time (NULL);
- strcpy (vl.host, hostname_g);
- strcpy (vl.plugin, "dns");
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "dns", sizeof (vl.plugin));
+ sstrncpy (vl.type, "dns_octets", sizeof (vl.type));
- plugin_dispatch_values ("dns_octets", &vl);
+ plugin_dispatch_values (&vl);
} /* void submit_counter */
static int dns_read (void)
values[0] = tr_queries;
values[1] = tr_responses;
pthread_mutex_unlock (&traffic_mutex);
- submit_octets (values[0], values[1]);
+
+ if ((values[0] != 0) || (values[1] != 0))
+ submit_octets (values[0], values[1]);
pthread_mutex_lock (&qtype_mutex);
for (ptr = qtype_list, len = 0;
return (0);
} /* int dns_read */
-#endif
void module_register (void)
{
-#if DNS_HAVE_READ
plugin_register_config ("dns", dns_config, config_keys, config_keys_num);
plugin_register_init ("dns", dns_init);
plugin_register_read ("dns", dns_read);
-#endif
} /* void module_register */
projects / collectd.git / blobdiff