/**
* collectd - src/iptables.c
- * Copyright (C) 2007 Sjoerd van der Berg
- * Copyright (C) 2007 Florian octo Forster
+ * Copyright (C) 2007 Sjoerd van der Berg
+ * Copyright (C) 2007-2010 Florian octo Forster
+ * Copyright (C) 2009 Marco Chiappero
*
* 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
*
* Authors:
* Sjoerd van der Berg <harekiet at users.sourceforge.net>
- * Florian Forster <octo at verplant.org>
+ * Florian Forster <octo at collectd.org>
+ * Marco Chiappero <marco at absence.it>
**/
#include "collectd.h"
+
#include "common.h"
#include "plugin.h"
#include "configfile.h"
-#if OWN_LIBIPTC
-# include "owniptc/libiptc.h"
-#else
-# include <libiptc/libiptc.h>
+#include <libiptc/libiptc.h>
+#include <libiptc/libip6tc.h>
+
+#ifdef HAVE_SYS_CAPABILITY_H
+# include <sys/capability.h>
#endif
/*
#ifndef HAVE_IPTC_HANDLE_T
typedef struct iptc_handle iptc_handle_t;
#endif
+#ifndef HAVE_IP6TC_HANDLE_T
+typedef struct ip6tc_handle ip6tc_handle_t;
+#endif
/*
* (Module-)Global variables
*/
static const char *config_keys[] =
{
- "Chain",
- NULL
+ "Chain",
+ "Chain6"
};
-static int config_keys_num = 1;
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+enum protocol_version_e
+{
+ IPV4,
+ IPV6
+};
+typedef enum protocol_version_e protocol_version_t;
+
/*
- Each table/chain combo that will be queried goes into this list
-*/
+ * Each table/chain combo that will be queried goes into this list
+ */
#ifndef XT_TABLE_MAXNAMELEN
# define XT_TABLE_MAXNAMELEN 32
#endif
typedef struct {
+ protocol_version_t ip_version;
char table[XT_TABLE_MAXNAMELEN];
char chain[XT_TABLE_MAXNAMELEN];
union
{
- int num;
- char *comment;
+ int num;
+ char *comment;
} rule;
enum
{
- RTYPE_NUM,
- RTYPE_COMMENT,
- RTYPE_COMMENT_ALL
+ RTYPE_NUM,
+ RTYPE_COMMENT,
+ RTYPE_COMMENT_ALL
} rule_type;
char name[64];
} ip_chain_t;
static int iptables_config (const char *key, const char *value)
{
- if (strcasecmp (key, "Chain") == 0)
- {
- ip_chain_t temp, *final, **list;
- char *table;
- int table_len;
- char *chain;
- int chain_len;
-
- char *value_copy;
- char *fields[4];
- int fields_num;
-
- memset (&temp, 0, sizeof (temp));
-
- value_copy = strdup (value);
- if (value_copy == NULL)
- {
- char errbuf[1024];
- ERROR ("strdup failed: %s",
- sstrerror (errno, errbuf, sizeof (errbuf)));
- return (1);
- }
-
- /* Chain <table> <chain> [<comment|num> [name]] */
- fields_num = strsplit (value_copy, fields, 4);
- if (fields_num < 2)
- {
- free (value_copy);
- return (1);
- }
-
- table = fields[0];
- chain = fields[1];
-
- table_len = strlen (table) + 1;
- if ((unsigned int)table_len > sizeof(temp.table))
- {
- ERROR ("Table `%s' too long.", table);
- free (value_copy);
- return (1);
- }
- sstrncpy (temp.table, table, table_len);
-
- chain_len = strlen (chain) + 1;
- if ((unsigned int)chain_len > sizeof(temp.chain))
- {
- ERROR ("Chain `%s' too long.", chain);
- free (value_copy);
- return (1);
- }
- sstrncpy (temp.chain, chain, chain_len);
-
- if (fields_num >= 3)
- {
- char *comment = fields[2];
- int rule = atoi (comment);
-
- if (rule)
- {
- temp.rule.num = rule;
- temp.rule_type = RTYPE_NUM;
- }
- else
- {
- temp.rule.comment = strdup (comment);
- if (temp.rule.comment == NULL)
- {
- free (value_copy);
- return (1);
- }
- temp.rule_type = RTYPE_COMMENT;
- }
- }
- else
- {
- temp.rule_type = RTYPE_COMMENT_ALL;
- }
-
- if (fields_num >= 4)
- sstrncpy (temp.name, fields[3], sizeof (temp.name));
-
- free (value_copy);
- value_copy = NULL;
- table = NULL;
- chain = NULL;
-
- list = (ip_chain_t **) realloc (chain_list, (chain_num + 1) * sizeof (ip_chain_t *));
- if (list == NULL)
- {
- char errbuf[1024];
- ERROR ("realloc failed: %s",
- sstrerror (errno, errbuf, sizeof (errbuf)));
- return (1);
- }
-
- chain_list = list;
- final = (ip_chain_t *) malloc( sizeof(temp) );
- if (final == NULL)
- {
- char errbuf[1024];
- ERROR ("malloc failed: %s",
- sstrerror (errno, errbuf, sizeof (errbuf)));
- return (1);
- }
- memcpy (final, &temp, sizeof (temp));
- chain_list[chain_num] = final;
- chain_num++;
-
- DEBUG ("Chain #%i: table = %s; chain = %s;", chain_num, final->table, final->chain);
- }
- else
- {
- return (-1);
- }
-
- return (0);
+ /* int ip_value; */
+ protocol_version_t ip_version = 0;
+
+ if (strcasecmp (key, "Chain") == 0)
+ ip_version = IPV4;
+ else if (strcasecmp (key, "Chain6") == 0)
+ ip_version = IPV6;
+ else
+ return (1);
+
+ ip_chain_t temp = { 0 };
+ ip_chain_t *final, **list;
+ char *table;
+ int table_len;
+ char *chain;
+ int chain_len;
+
+ char *value_copy;
+ char *fields[4];
+ int fields_num;
+
+ value_copy = strdup (value);
+ if (value_copy == NULL)
+ {
+ char errbuf[1024];
+ ERROR ("strdup failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (1);
+ }
+
+ /*
+ * Time to fill the temp element
+ * Examine value string, it should look like:
+ * Chain[6] <table> <chain> [<comment|num> [name]]
+ */
+
+ /* set IPv4 or IPv6 */
+ temp.ip_version = ip_version;
+
+ /* Chain <table> <chain> [<comment|num> [name]] */
+ fields_num = strsplit (value_copy, fields, 4);
+ if (fields_num < 2)
+ {
+ free (value_copy);
+ return (1);
+ }
+
+ table = fields[0];
+ chain = fields[1];
+
+ table_len = strlen (table) + 1;
+ if ((unsigned int)table_len > sizeof(temp.table))
+ {
+ ERROR ("Table `%s' too long.", table);
+ free (value_copy);
+ return (1);
+ }
+ sstrncpy (temp.table, table, table_len);
+
+ chain_len = strlen (chain) + 1;
+ if ((unsigned int)chain_len > sizeof(temp.chain))
+ {
+ ERROR ("Chain `%s' too long.", chain);
+ free (value_copy);
+ return (1);
+ }
+ sstrncpy (temp.chain, chain, chain_len);
+
+ if (fields_num >= 3)
+ {
+ char *comment = fields[2];
+ int rule = atoi (comment);
+
+ if (rule)
+ {
+ temp.rule.num = rule;
+ temp.rule_type = RTYPE_NUM;
+ }
+ else
+ {
+ temp.rule.comment = strdup (comment);
+ if (temp.rule.comment == NULL)
+ {
+ free (value_copy);
+ return (1);
+ }
+ temp.rule_type = RTYPE_COMMENT;
+ }
+ }
+ else
+ {
+ temp.rule_type = RTYPE_COMMENT_ALL;
+ }
+
+ if (fields_num >= 4)
+ sstrncpy (temp.name, fields[3], sizeof (temp.name));
+
+ free (value_copy);
+ value_copy = NULL;
+ table = NULL;
+ chain = NULL;
+
+ list = realloc (chain_list, (chain_num + 1) * sizeof (ip_chain_t *));
+ if (list == NULL)
+ {
+ char errbuf[1024];
+ ERROR ("realloc failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ sfree (temp.rule.comment);
+ return (1);
+ }
+
+ chain_list = list;
+ final = malloc(sizeof (*final));
+ if (final == NULL)
+ {
+ char errbuf[1024];
+ ERROR ("malloc failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ sfree (temp.rule.comment);
+ return (1);
+ }
+ memcpy (final, &temp, sizeof (temp));
+ chain_list[chain_num] = final;
+ chain_num++;
+
+ DEBUG ("Chain #%i: table = %s; chain = %s;", chain_num, final->table, final->chain);
+
+ return (0);
} /* int iptables_config */
+static int submit6_match (const struct ip6t_entry_match *match,
+ const struct ip6t_entry *entry,
+ const ip_chain_t *chain,
+ int rule_num)
+{
+ int status;
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+
+ /* Select the rules to collect */
+ if (chain->rule_type == RTYPE_NUM)
+ {
+ if (chain->rule.num != rule_num)
+ return (0);
+ }
+ else
+ {
+ if (strcmp (match->u.user.name, "comment") != 0)
+ return (0);
+ if ((chain->rule_type == RTYPE_COMMENT)
+ && (strcmp (chain->rule.comment, (char *) match->data) != 0))
+ return (0);
+ }
+
+ vl.values = values;
+ vl.values_len = 1;
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "ip6tables", sizeof (vl.plugin));
+
+ status = ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
+ "%s-%s", chain->table, chain->chain);
+ if ((status < 1) || ((unsigned int)status >= sizeof (vl.plugin_instance)))
+ return (0);
+
+ if (chain->name[0] != '\0')
+ {
+ sstrncpy (vl.type_instance, chain->name, sizeof (vl.type_instance));
+ }
+ else
+ {
+ if (chain->rule_type == RTYPE_NUM)
+ ssnprintf (vl.type_instance, sizeof (vl.type_instance),
+ "%i", chain->rule.num);
+ else
+ sstrncpy (vl.type_instance, (char *) match->data,
+ sizeof (vl.type_instance));
+ }
+
+ sstrncpy (vl.type, "ipt_bytes", sizeof (vl.type));
+ values[0].derive = (derive_t) entry->counters.bcnt;
+ plugin_dispatch_values (&vl);
+
+ sstrncpy (vl.type, "ipt_packets", sizeof (vl.type));
+ values[0].derive = (derive_t) entry->counters.pcnt;
+ plugin_dispatch_values (&vl);
+
+ return (0);
+} /* int submit_match */
+
+
/* This needs to return `int' for IPT_MATCH_ITERATE to work. */
static int submit_match (const struct ipt_entry_match *match,
- const struct ipt_entry *entry,
- const ip_chain_t *chain,
- int rule_num)
+ const struct ipt_entry *entry,
+ const ip_chain_t *chain,
+ int rule_num)
{
int status;
value_t values[1];
/* Select the rules to collect */
if (chain->rule_type == RTYPE_NUM)
{
- if (chain->rule.num != rule_num)
- return (0);
+ if (chain->rule.num != rule_num)
+ return (0);
}
else
{
- if (strcmp (match->u.user.name, "comment") != 0)
- return (0);
- if ((chain->rule_type == RTYPE_COMMENT)
- && (strcmp (chain->rule.comment, (char *) match->data) != 0))
- return (0);
+ if (strcmp (match->u.user.name, "comment") != 0)
+ return (0);
+ if ((chain->rule_type == RTYPE_COMMENT)
+ && (strcmp (chain->rule.comment, (char *) match->data) != 0))
+ return (0);
}
vl.values = values;
sstrncpy (vl.plugin, "iptables", sizeof (vl.plugin));
status = ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance),
- "%s-%s", chain->table, chain->chain);
+ "%s-%s", chain->table, chain->chain);
if ((status < 1) || ((unsigned int)status >= sizeof (vl.plugin_instance)))
- return (0);
+ return (0);
if (chain->name[0] != '\0')
{
- sstrncpy (vl.type_instance, chain->name, sizeof (vl.type_instance));
+ sstrncpy (vl.type_instance, chain->name, sizeof (vl.type_instance));
}
else
{
- if (chain->rule_type == RTYPE_NUM)
- ssnprintf (vl.type_instance, sizeof (vl.type_instance),
- "%i", chain->rule.num);
- else
- sstrncpy (vl.type_instance, (char *) match->data,
- sizeof (vl.type_instance));
+ if (chain->rule_type == RTYPE_NUM)
+ ssnprintf (vl.type_instance, sizeof (vl.type_instance),
+ "%i", chain->rule.num);
+ else
+ sstrncpy (vl.type_instance, (char *) match->data,
+ sizeof (vl.type_instance));
}
sstrncpy (vl.type, "ipt_bytes", sizeof (vl.type));
- values[0].counter = (counter_t) entry->counters.bcnt;
+ values[0].derive = (derive_t) entry->counters.bcnt;
plugin_dispatch_values (&vl);
sstrncpy (vl.type, "ipt_packets", sizeof (vl.type));
- values[0].counter = (counter_t) entry->counters.pcnt;
+ values[0].derive = (derive_t) entry->counters.pcnt;
plugin_dispatch_values (&vl);
return (0);
-} /* void submit_match */
+} /* int submit_match */
+
+
+/* ipv6 submit_chain */
+static void submit6_chain (ip6tc_handle_t *handle, ip_chain_t *chain)
+{
+ const struct ip6t_entry *entry;
+ int rule_num;
+
+ /* Find first rule for chain and use the iterate macro */
+ entry = ip6tc_first_rule( chain->chain, handle );
+ if (entry == NULL)
+ {
+ DEBUG ("ip6tc_first_rule failed: %s", ip6tc_strerror (errno));
+ return;
+ }
+
+ rule_num = 1;
+ while (entry)
+ {
+ if (chain->rule_type == RTYPE_NUM)
+ {
+ submit6_match (NULL, entry, chain, rule_num);
+ }
+ else
+ {
+ IP6T_MATCH_ITERATE( entry, submit6_match, entry, chain, rule_num );
+ }
+
+ entry = ip6tc_next_rule( entry, handle );
+ rule_num++;
+ } /* while (entry) */
+}
+
-static void submit_chain( iptc_handle_t *handle, ip_chain_t *chain ) {
+/* ipv4 submit_chain */
+static void submit_chain (iptc_handle_t *handle, ip_chain_t *chain)
+{
const struct ipt_entry *entry;
int rule_num;
- /* Find first rule for chain and use the iterate macro */
+ /* Find first rule for chain and use the iterate macro */
entry = iptc_first_rule( chain->chain, handle );
if (entry == NULL)
{
- DEBUG ("iptc_first_rule failed: %s", iptc_strerror (errno));
- return;
+ DEBUG ("iptc_first_rule failed: %s", iptc_strerror (errno));
+ return;
}
rule_num = 1;
while (entry)
{
- if (chain->rule_type == RTYPE_NUM)
- {
- submit_match (NULL, entry, chain, rule_num);
- }
- else
- {
- IPT_MATCH_ITERATE( entry, submit_match, entry, chain, rule_num );
- }
-
- entry = iptc_next_rule( entry, handle );
- rule_num++;
+ if (chain->rule_type == RTYPE_NUM)
+ {
+ submit_match (NULL, entry, chain, rule_num);
+ }
+ else
+ {
+ IPT_MATCH_ITERATE( entry, submit_match, entry, chain, rule_num );
+ }
+
+ entry = iptc_next_rule( entry, handle );
+ rule_num++;
} /* while (entry) */
}
static int iptables_read (void)
{
- int i;
int num_failures = 0;
+ ip_chain_t *chain;
- /* Init the iptc handle structure and query the correct table */
- for (i = 0; i < chain_num; i++)
+ /* Init the iptc handle structure and query the correct table */
+ for (int i = 0; i < chain_num; i++)
{
+ chain = chain_list[i];
+
+ if (!chain)
+ {
+ DEBUG ("iptables plugin: chain == NULL");
+ continue;
+ }
+
+ if ( chain->ip_version == IPV4 )
+ {
#ifdef HAVE_IPTC_HANDLE_T
- iptc_handle_t _handle;
- iptc_handle_t *handle = &_handle;
+ iptc_handle_t _handle;
+ iptc_handle_t *handle = &_handle;
+
+ *handle = iptc_init (chain->table);
#else
- iptc_handle_t *handle;
+ iptc_handle_t *handle;
+ handle = iptc_init (chain->table);
#endif
- ip_chain_t *chain;
-
- chain = chain_list[i];
- if (!chain)
- {
- DEBUG ("iptables plugin: chain == NULL");
- continue;
- }
-#ifdef HAVE_IPTC_HANDLE_T
- *handle = iptc_init (chain->table);
+ if (!handle)
+ {
+ ERROR ("iptables plugin: iptc_init (%s) failed: %s",
+ chain->table, iptc_strerror (errno));
+ num_failures++;
+ continue;
+ }
+
+ submit_chain (handle, chain);
+ iptc_free (handle);
+ }
+ else if ( chain->ip_version == IPV6 )
+ {
+#ifdef HAVE_IP6TC_HANDLE_T
+ ip6tc_handle_t _handle;
+ ip6tc_handle_t *handle = &_handle;
+
+ *handle = ip6tc_init (chain->table);
#else
- handle = iptc_init (chain->table);
+ ip6tc_handle_t *handle;
+ handle = ip6tc_init (chain->table);
#endif
- if (!handle)
- {
- ERROR ("iptables plugin: iptc_init (%s) failed: %s",
- chain->table, iptc_strerror (errno));
- num_failures++;
- continue;
- }
-
- submit_chain (handle, chain);
- iptc_free (handle);
+ if (!handle)
+ {
+ ERROR ("iptables plugin: ip6tc_init (%s) failed: %s",
+ chain->table, ip6tc_strerror (errno));
+ num_failures++;
+ continue;
+ }
+
+ submit6_chain (handle, chain);
+ ip6tc_free (handle);
+ }
+ else
+ num_failures++;
} /* for (i = 0 .. chain_num) */
return ((num_failures < chain_num) ? 0 : -1);
static int iptables_shutdown (void)
{
- int i;
-
- for (i = 0; i < chain_num; i++)
+ for (int i = 0; i < chain_num; i++)
{
- if ((chain_list[i] != NULL) && (chain_list[i]->rule_type == RTYPE_COMMENT))
- {
- sfree (chain_list[i]->rule.comment);
- }
- sfree (chain_list[i]);
+ if ((chain_list[i] != NULL) && (chain_list[i]->rule_type == RTYPE_COMMENT))
+ sfree (chain_list[i]->rule.comment);
+ sfree (chain_list[i]);
}
sfree (chain_list);
return (0);
} /* int iptables_shutdown */
+static int iptables_init (void)
+{
+#if defined(HAVE_SYS_CAPABILITY_H) && defined(CAP_NET_ADMIN)
+ if (check_capability (CAP_NET_ADMIN) != 0)
+ {
+ if (getuid () == 0)
+ WARNING ("iptables plugin: Running collectd as root, but the "
+ "CAP_NET_ADMIN capability is missing. The plugin's read "
+ "function will probably fail. Is your init system dropping "
+ "capabilities?");
+ else
+ WARNING ("iptables plugin: collectd doesn't have the CAP_NET_ADMIN "
+ "capability. If you don't want to run collectd as root, try "
+ "running \"setcap cap_net_admin=ep\" on the collectd binary.");
+ }
+#endif
+ return (0);
+} /* int iptables_init */
+
void module_register (void)
{
plugin_register_config ("iptables", iptables_config,
- config_keys, config_keys_num);
+ config_keys, config_keys_num);
+ plugin_register_init ("iptables", iptables_init);
plugin_register_read ("iptables", iptables_read);
plugin_register_shutdown ("iptables", iptables_shutdown);
} /* void module_register */
-/*
- * vim:shiftwidth=4:softtabstop=4:tabstop=8
- */
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