--- /dev/null
+/**
+ * collectd - src/bind.c
+ * Copyright (C) 2009 Bruno Prémont
+ * Copyright (C) 2009 Florian Forster
+ *
+ * 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
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Bruno Prémont <bonbons at linux-vserver.org>
+ * Florian Forster <octo at verplant.org>
+ **/
+
+/* Set to C99 and POSIX code */
+#ifndef _ISOC99_SOURCE
+# define _ISOC99_SOURCE
+#endif
+#ifndef _POSIX_SOURCE
+# define _POSIX_SOURCE
+#endif
+#ifndef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200112L
+#endif
+#ifndef _REENTRANT
+# define _REENTRANT
+#endif
+#ifndef _XOPEN_SOURCE
+# define _XOPEN_SOURCE 600
+#endif
+#ifndef _BSD_SOURCE
+# define _BSD_SOURCE
+#endif
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "configfile.h"
+
+#include <curl/curl.h>
+#include <libxml/parser.h>
+#include <libxml/xpath.h>
+
+#ifndef BIND_DEFAULT_URL
+# define BIND_DEFAULT_URL "http://localhost:8053/"
+#endif
+
+/*
+ * Some types used for the callback functions. `translation_table_ptr_t' and
+ * `list_info_ptr_t' are passed to the callbacks in the `void *user_data'
+ * pointer.
+ */
+typedef int (*list_callback_t) (const char *name, counter_t value,
+ time_t current_time, void *user_data);
+
+struct translation_info_s
+{
+ const char *xml_name;
+ const char *type;
+ const char *type_instance;
+ const int *config_variable;
+};
+typedef struct translation_info_s translation_info_t;
+
+struct translation_table_ptr_s
+{
+ const translation_info_t *table;
+ size_t table_length;
+ const char *plugin_instance;
+};
+typedef struct translation_table_ptr_s translation_table_ptr_t;
+
+struct list_info_ptr_s
+{
+ const char *plugin_instance;
+ const char *type;
+};
+typedef struct list_info_ptr_s list_info_ptr_t;
+
+static char *url = NULL;
+static int use_requests = 1;
+static int use_rejects = 1;
+static int use_responses = 1;
+static int use_queries = 1;
+static int use_rcode = 1;
+static int use_zonestats = 1;
+static int use_opcode = 1;
+static int use_resolver = 1;
+static int use_dnssec = 1;
+
+static int use_rrqueries_in = 1;
+static int use_query_results = 1;
+static int use_updates = 1;
+static int use_zone_maint = 1;
+
+static CURL *curl = NULL;
+
+static char *bind_buffer = NULL;
+static size_t bind_buffer_size = 0;
+static size_t bind_buffer_fill = 0;
+static char bind_curl_error[CURL_ERROR_SIZE];
+
+static const char *config_keys[] =
+{
+ "URL",
+ "Requests",
+ "Rejects",
+ "Responses",
+ "Queries",
+ "RCode",
+ "ZoneStats",
+ "OpCodes",
+ "Resolver",
+ "DNSSEC",
+
+ "RRQueriesIn",
+ "QueryResults",
+ "Updates",
+ "ZoneMaintenance"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+/* Translation table for the `nsstats' values. */
+static const translation_info_t nsstats_translation_table[] =
+{
+ /* Requests */
+ { "Requestv4", "dns_request", "IPv4", &use_requests },
+ { "Requestv6", "dns_request", "IPv6", &use_requests },
+ { "ReqEdns0", "dns_request", "EDNS0", &use_requests },
+ { "ReqBadEDNSVer", "dns_request", "BadEDNSVer", &use_requests },
+ { "ReqTSIG", "dns_request", "TSIG", &use_requests },
+ { "ReqSIG0", "dns_request", "SIG0", &use_requests },
+ { "ReqBadSIG", "dns_request", "BadSIG", &use_requests },
+ { "ReqTCP", "dns_request", "TCP", &use_requests },
+ /* Rejects */
+ { "AuthQryRej", "dns_reject", "authorative", &use_rejects },
+ { "RecQryRej", "dns_reject", "recursive", &use_rejects },
+ { "XfrRej", "dns_reject", "transer", &use_rejects },
+ { "UpdateRej", "dns_reject", "update", &use_rejects },
+ /* Responses */
+ { "Response", "dns_response", "normal", &use_responses },
+ { "TruncatedResp", "dns_response", "truncated", &use_responses },
+ { "RespEDNS0", "dns_response", "EDNS0", &use_responses },
+ { "RespTSIG", "dns_response", "TSIG", &use_responses },
+ { "RespSIG0", "dns_response", "SIG0", &use_responses },
+ /* Queries */
+ { "QryAuthAns", "dns_query", "authorative", &use_queries },
+ { "QryNoauthAns", "dns_query", "nonauth", &use_queries },
+ { "QryReferral", "dns_query", "referral", &use_queries },
+ { "QryRecursion", "dns_query", "recursion", &use_queries },
+ { "QryDuplicate", "dns_query", "dupliate", &use_queries },
+ { "QryDropped", "dns_query", "dropped", &use_queries },
+ { "QryFailure", "dns_query", "failure", &use_queries },
+ /* Response codes */
+ { "QrySuccess", "dns_rcode", "tx-NOERROR", &use_rcode },
+ { "QryNxrrset", "dns_rcode", "tx-NXRRSET", &use_rcode },
+ { "QrySERVFAIL", "dns_rcode", "tx-SERVFAIL", &use_rcode },
+ { "QryFORMERR", "dns_rcode", "tx-FORMERR", &use_rcode },
+ { "QryNXDOMAIN", "dns_rcode", "tx-NXDOMAIN", &use_rcode }
+#if 0
+ { "XfrReqDone", "type", "type_instance", &use_something },
+ { "UpdateReqFwd", "type", "type_instance", &use_something },
+ { "UpdateRespFwd", "type", "type_instance", &use_something },
+ { "UpdateFwdFail", "type", "type_instance", &use_something },
+ { "UpdateDone", "type", "type_instance", &use_something },
+ { "UpdateFail", "type", "type_instance", &use_something },
+ { "UpdateBadPrereq", "type", "type_instance", &use_something },
+#endif
+};
+static int nsstats_translation_table_length =
+ STATIC_ARRAY_SIZE (nsstats_translation_table);
+#define PARSE_NSSTATS (use_requests || use_rejects || use_responses \
+ || use_queries || use_rcode)
+
+/* Translation table for the `zonestats' values. */
+static const translation_info_t zonestats_translation_table[] =
+{
+ /* Notify's */
+ { "NotifyOutv4", "dns_notify", "tx-IPv4", &use_zonestats },
+ { "NotifyOutv6", "dns_notify", "tx-IPv6", &use_zonestats },
+ { "NotifyInv4", "dns_notify", "rx-IPv4", &use_zonestats },
+ { "NotifyInv6", "dns_notify", "rx-IPv6", &use_zonestats },
+ { "NotifyRej", "dns_notify", "rejected", &use_zonestats },
+ /* SOA/AXFS/IXFS requests */
+ { "SOAOutv4", "dns_opcode", "SOA-IPv4", &use_opcode },
+ { "SOAOutv6", "dns_opcode", "SOA-IPv4", &use_opcode },
+ { "AXFRReqv4", "dns_opcode", "AXFR-IPv4", &use_opcode },
+ { "AXFRReqv6", "dns_opcode", "AXFR-IPv6", &use_opcode },
+ { "IXFRReqv4", "dns_opcode", "IXFR-IPv4", &use_opcode },
+ { "IXFRReqv6", "dns_opcode", "IXFR-IPv6", &use_opcode },
+ /* Domain transfers */
+ { "XfrSuccess", "dns_transfer", "success", &use_zonestats },
+ { "XfrFail", "dns_transfer", "failure", &use_zonestats }
+};
+static int zonestats_translation_table_length =
+ STATIC_ARRAY_SIZE (zonestats_translation_table);
+#define PARSE_ZONESTATS (use_zonestats || use_opcode)
+
+/* Translation table for the `resstats' values. */
+static const translation_info_t resstats_translation_table[] =
+{
+ /* Generic resolver information */
+ { "Queryv4", "dns_query", "IPv4", &use_resolver },
+ { "Queryv6", "dns_query", "IPv6", &use_resolver },
+ { "Responsev4", "dns_response", "IPv4", &use_resolver },
+ { "Responsev6", "dns_response", "IPv6", &use_resolver },
+ /* Received response codes */
+ { "NXDOMAIN", "dns_rcode", "rx-NXDOMAIN", &use_rcode },
+ { "SERVFAIL", "dns_rcode", "rx-SERVFAIL", &use_rcode },
+ { "FORMERR", "dns_rcode", "rx-FORMERR", &use_rcode },
+ { "OtherError", "dns_rcode", "rx-OTHER", &use_rcode },
+ { "EDNS0Fail", "dns_rcode", "rx-EDNS0Fail", &use_rcode },
+ /* Received responses */
+ { "Mismatch", "dns_response", "mismatch", &use_responses },
+ { "Truncated", "dns_response", "truncated", &use_responses },
+ { "Lame", "dns_response", "lame", &use_responses },
+ { "Retry", "dns_query", "retry", &use_responses },
+#if 0
+ { "GlueFetchv4", "type", "type_instance", &use_something },
+ { "GlueFetchv6", "type", "type_instance", &use_something },
+ { "GlueFetchv4Fail", "type", "type_instance", &use_something },
+ { "GlueFetchv6Fail", "type", "type_instance", &use_something },
+#endif
+ /* DNSSEC information */
+ { "ValAttempt", "dns_resolver", "DNSSEC-attempt", &use_dnssec },
+ { "ValOk", "dns_resolver", "DNSSEC-okay", &use_dnssec },
+ { "ValNegOk", "dns_resolver", "DNSSEC-negokay", &use_dnssec },
+ { "ValFail", "dns_resolver", "DNSSEC-fail", &use_dnssec }
+};
+static int resstats_translation_table_length =
+ STATIC_ARRAY_SIZE (resstats_translation_table);
+#define PARSE_RESSTATS (use_resolver || use_rcode || use_responses || use_dnssec)
+
+static void remove_special (char *buffer, size_t buffer_size)
+{
+ size_t i;
+
+ for (i = 0; i < buffer_size; i++)
+ {
+ if (buffer[i] == 0)
+ return;
+ if (!isalnum ((int) buffer[i]))
+ buffer[i] = '_';
+ }
+} /* void remove_special */
+
+static void submit_counter(time_t ts, const char *plugin_instance, const char *type,
+ const char *type_instance, counter_t value)
+{
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+
+ values[0].counter = value;
+
+ vl.values = values;
+ vl.values_len = 1;
+ vl.time = (ts == 0) ? time (NULL) : ts;
+ sstrncpy(vl.host, hostname_g, sizeof(vl.host));
+ sstrncpy(vl.plugin, "bind", sizeof(vl.plugin));
+ if (plugin_instance) {
+ sstrncpy(vl.plugin_instance, plugin_instance,
+ sizeof(vl.plugin_instance));
+ remove_special (vl.plugin_instance, sizeof (vl.plugin_instance));
+ }
+ sstrncpy(vl.type, type, sizeof(vl.type));
+ if (type_instance) {
+ sstrncpy(vl.type_instance, type_instance,
+ sizeof(vl.type_instance));
+ remove_special (vl.plugin_instance, sizeof (vl.plugin_instance));
+ }
+ plugin_dispatch_values(&vl);
+} /* void submit_counter */
+
+static size_t bind_curl_callback (void *buf, size_t size, size_t nmemb,
+ void *stream)
+{
+ size_t len = size * nmemb;
+
+ if (len <= 0)
+ return (len);
+
+ if ((bind_buffer_fill + len) >= bind_buffer_size)
+ {
+ char *temp;
+
+ temp = realloc(bind_buffer, bind_buffer_fill + len + 1);
+ if (temp == NULL)
+ {
+ ERROR ("bind plugin: realloc failed.");
+ return (0);
+ }
+ bind_buffer = temp;
+ bind_buffer_size = bind_buffer_fill + len + 1;
+ }
+
+ memcpy (bind_buffer + bind_buffer_fill, (char *) buf, len);
+ bind_buffer_fill += len;
+ bind_buffer[bind_buffer_fill] = 0;
+
+ return (len);
+} /* size_t bind_curl_callback */
+
+/*
+ * Callback, that's called with a translation table.
+ * (Plugin instance is fixed, type and type instance come from lookup table.)
+ */
+static int bind_xml_table_callback (const char *name, counter_t value,
+ time_t current_time, void *user_data)
+{
+ translation_table_ptr_t *table = (translation_table_ptr_t *) user_data;
+ size_t i;
+
+ if (table == NULL)
+ return (-1);
+
+ for (i = 0; i < table->table_length; i++)
+ {
+ if (strcmp (table->table[i].xml_name, name) != 0)
+ continue;
+
+ if (*table->table[i].config_variable == 0)
+ break;
+
+ submit_counter (current_time,
+ table->plugin_instance,
+ table->table[i].type,
+ table->table[i].type_instance,
+ value);
+ break;
+ }
+
+ return (0);
+} /* int bind_xml_table_callback */
+
+/*
+ * Callback, that's used for lists.
+ * (Plugin instance and type are fixed, xml name is used as type instance.)
+ */
+static int bind_xml_list_callback (const char *name, counter_t value,
+ time_t current_time, void *user_data)
+{
+ list_info_ptr_t *list_info = (list_info_ptr_t *) user_data;
+
+ if (list_info == NULL)
+ return (-1);
+
+ submit_counter (current_time,
+ list_info->plugin_instance,
+ list_info->type,
+ /* type instance = */ name,
+ value);
+
+ return (0);
+} /* int bind_xml_list_callback */
+
+static int bind_xml_read_counter (xmlDoc *doc, xmlNode *node,
+ counter_t *ret_value)
+{
+ char *str_ptr, *end_ptr;
+ long long int value;
+
+ str_ptr = (char *) xmlNodeListGetString (doc, node->xmlChildrenNode, 1);
+ if (str_ptr == NULL)
+ {
+ ERROR ("bind plugin: bind_xml_read_counter: xmlNodeListGetString failed.");
+ return (-1);
+ }
+
+ errno = 0;
+ value = strtoll (str_ptr, &end_ptr, 10);
+ xmlFree(str_ptr);
+ if (str_ptr == end_ptr || errno)
+ {
+ if (errno && (value < 0))
+ ERROR ("bind plugin: bind_xml_read_counter: strtoll failed with underflow.");
+ else if (errno && (value > 0))
+ ERROR ("bind plugin: bind_xml_read_counter: strtoll failed with overflow.");
+ else
+ ERROR ("bind plugin: bind_xml_read_counter: strtoll failed.");
+ return (-1);
+ }
+
+ *ret_value = value;
+ return (0);
+} /* int bind_xml_read_counter */
+
+static int bind_xml_read_timestamp (const char *xpath_expression, xmlDoc *doc,
+ xmlXPathContext *xpathCtx, time_t *ret_value)
+{
+ xmlXPathObject *xpathObj = NULL;
+ xmlNode *node;
+ char *str_ptr;
+ char *tmp;
+ struct tm tm;
+
+ xpathObj = xmlXPathEvalExpression (BAD_CAST xpath_expression, xpathCtx);
+ if (xpathObj == NULL)
+ {
+ ERROR ("bind plugin: Unable to evaluate XPath expression `%s'.",
+ xpath_expression);
+ return (-1);
+ }
+
+ if ((xpathObj->nodesetval == NULL) || (xpathObj->nodesetval->nodeNr < 1))
+ {
+ xmlXPathFreeObject (xpathObj);
+ return (-1);
+ }
+
+ if (xpathObj->nodesetval->nodeNr != 1)
+ {
+ NOTICE ("bind plugin: Evaluating the XPath expression `%s' returned "
+ "%i nodes. Only handling the first one.",
+ xpath_expression, xpathObj->nodesetval->nodeNr);
+ }
+
+ node = xpathObj->nodesetval->nodeTab[0];
+
+ if (node->xmlChildrenNode == NULL)
+ {
+ ERROR ("bind plugin: bind_xml_read_timestamp: "
+ "node->xmlChildrenNode == NULL");
+ xmlXPathFreeObject (xpathObj);
+ return (-1);
+ }
+
+ str_ptr = (char *) xmlNodeListGetString (doc, node->xmlChildrenNode, 1);
+ if (str_ptr == NULL)
+ {
+ ERROR ("bind plugin: bind_xml_read_timestamp: xmlNodeListGetString failed.");
+ xmlXPathFreeObject (xpathObj);
+ return (-1);
+ }
+
+ memset (&tm, 0, sizeof(tm));
+ tmp = strptime (str_ptr, "%Y-%m-%dT%T", &tm);
+ xmlFree(str_ptr);
+ if (tmp == NULL)
+ {
+ ERROR ("bind plugin: bind_xml_read_timestamp: strptime failed.");
+ xmlXPathFreeObject (xpathObj);
+ return (-1);
+ }
+
+ *ret_value = timegm(&tm);
+
+ xmlXPathFreeObject (xpathObj);
+ return (0);
+} /* int bind_xml_read_timestamp */
+
+/*
+ * bind_parse_generic_name_value
+ *
+ * Reads statistics in the form:
+ * <foo>
+ * <name>QUERY</name>
+ * <value>123</name>
+ * </foo>
+ */
+static int bind_parse_generic_name_value (const char *xpath_expression,
+ list_callback_t list_callback,
+ void *user_data,
+ xmlDoc *doc, xmlXPathContext *xpathCtx,
+ time_t current_time)
+{
+ xmlXPathObject *xpathObj = NULL;
+ int num_entries;
+ int i;
+
+ xpathObj = xmlXPathEvalExpression(BAD_CAST xpath_expression, xpathCtx);
+ if (xpathObj == NULL)
+ {
+ ERROR("bind plugin: Unable to evaluate XPath expression `%s'.",
+ xpath_expression);
+ return (-1);
+ }
+
+ num_entries = 0;
+ /* Iterate over all matching nodes. */
+ for (i = 0; xpathObj->nodesetval && (i < xpathObj->nodesetval->nodeNr); i++)
+ {
+ xmlNode *name_node = NULL;
+ xmlNode *counter = NULL;
+ xmlNode *child;
+
+ /* Iterate over all child nodes. */
+ for (child = xpathObj->nodesetval->nodeTab[i]->xmlChildrenNode;
+ child != NULL;
+ child = child->next)
+ {
+ if (child->type != XML_ELEMENT_NODE)
+ continue;
+
+ if (xmlStrcmp (BAD_CAST "name", child->name) == 0)
+ name_node = child;
+ else if (xmlStrcmp (BAD_CAST "counter", child->name) == 0)
+ counter = child;
+ }
+
+ if ((name_node != NULL) && (counter != NULL))
+ {
+ char *name = (char *) xmlNodeListGetString (doc,
+ name_node->xmlChildrenNode, 1);
+ counter_t value;
+ int status;
+
+ status = bind_xml_read_counter (doc, counter, &value);
+ if (status != 0)
+ continue;
+
+ status = (*list_callback) (name, value, current_time, user_data);
+ if (status == 0)
+ num_entries++;
+
+ xmlFree (name);
+ }
+ }
+
+ DEBUG ("bind plugin: Found %d %s for XPath expression `%s'",
+ num_entries, (num_entries == 1) ? "entry" : "entries",
+ xpath_expression);
+
+ xmlXPathFreeObject(xpathObj);
+
+ return (0);
+} /* int bind_parse_generic_name_value */
+
+/*
+ * bind_parse_generic_value_list
+ *
+ * Reads statistics in the form:
+ * <foo>
+ * <name0>123</name0>
+ * <name1>234</name1>
+ * <name2>345</name2>
+ * :
+ * </foo>
+ */
+static int bind_parse_generic_value_list (const char *xpath_expression,
+ list_callback_t list_callback,
+ void *user_data,
+ xmlDoc *doc, xmlXPathContext *xpathCtx,
+ time_t current_time)
+{
+ xmlXPathObject *xpathObj = NULL;
+ int num_entries;
+ int i;
+
+ xpathObj = xmlXPathEvalExpression(BAD_CAST xpath_expression, xpathCtx);
+ if (xpathObj == NULL)
+ {
+ ERROR("bind plugin: Unable to evaluate XPath expression `%s'.",
+ xpath_expression);
+ return (-1);
+ }
+
+ num_entries = 0;
+ /* Iterate over all matching nodes. */
+ for (i = 0; xpathObj->nodesetval && (i < xpathObj->nodesetval->nodeNr); i++)
+ {
+ xmlNode *child;
+
+ /* Iterate over all child nodes. */
+ for (child = xpathObj->nodesetval->nodeTab[i]->xmlChildrenNode;
+ child != NULL;
+ child = child->next)
+ {
+ char *node_name;
+ counter_t value;
+ int status;
+
+ if (child->type != XML_ELEMENT_NODE)
+ continue;
+
+ node_name = (char *) child->name;
+ status = bind_xml_read_counter (doc, child, &value);
+ if (status != 0)
+ continue;
+
+ status = (*list_callback) (node_name, value, current_time, user_data);
+ if (status == 0)
+ num_entries++;
+ }
+ }
+
+ DEBUG ("bind plugin: Found %d %s for XPath expression `%s'",
+ num_entries, (num_entries == 1) ? "entry" : "entries",
+ xpath_expression);
+
+ xmlXPathFreeObject(xpathObj);
+
+ return (0);
+} /* int bind_parse_generic_value_list */
+
+static int bind_xml_stats (int version, xmlDoc *doc,
+ xmlXPathContext *xpathCtx, xmlNode *statsnode)
+{
+ time_t current_time = 0;
+ int status;
+
+ xpathCtx->node = statsnode;
+
+ /* TODO: Check `server/boot-time' to recognize server restarts. */
+
+ status = bind_xml_read_timestamp ("server/current-time",
+ doc, xpathCtx, ¤t_time);
+ if (status != 0)
+ {
+ ERROR ("bind plugin: Reading `server/current-time' failed.");
+ return (-1);
+ }
+ DEBUG ("bind plugin: Current server time is %i.", (int) current_time);
+
+ /* XPath: server/requests/opcode
+ * Variables: QUERY, IQUERY, NOTIFY, UPDATE, ...
+ * Layout:
+ * <opcode>
+ * <name>A</name>
+ * <counter>1</counter>
+ * </opcode>
+ * :
+ */
+ if (use_opcode)
+ {
+ list_info_ptr_t list_info =
+ {
+ /* plugin instance = */ "requests",
+ /* type = */ "dns_opcode"
+ };
+
+ bind_parse_generic_name_value (/* xpath = */ "server/requests/opcode",
+ /* callback = */ bind_xml_list_callback,
+ /* user_data = */ &list_info,
+ doc, xpathCtx, current_time);
+ }
+
+ /* XPath: server/queries-in/rdtype
+ * Variables: RESERVED0, A, NS, CNAME, SOA, MR, PTR, HINFO, MX, TXT, RP,
+ * X25, PX, AAAA, LOC, SRV, NAPTR, A6, DS, RRSIG, NSEC, DNSKEY,
+ * SPF, TKEY, IXFR, AXFR, ANY, ..., Others
+ * Layout:
+ * <rdtype>
+ * <name>A</name>
+ * <counter>1</counter>
+ * </rdtype>
+ * :
+ */
+ if (use_rrqueries_in)
+ {
+ list_info_ptr_t list_info =
+ {
+ /* plugin instance = */ "queries-in",
+ /* type = */ "dns_qtype"
+ };
+
+ bind_parse_generic_name_value (/* xpath = */ "server/queries-in/rdtype",
+ /* callback = */ bind_xml_list_callback,
+ /* user_data = */ &list_info,
+ doc, xpathCtx, current_time);
+ }
+
+ /* XPath: server/nsstats, server/nsstat
+ * Variables: Requestv4, Requestv6, ReqEdns0, ReqBadEDNSVer, ReqTSIG,
+ * ReqSIG0, ReqBadSIG, ReqTCP, AuthQryRej, RecQryRej, XfrRej,
+ * UpdateRej, Response, TruncatedResp, RespEDNS0, RespTSIG,
+ * RespSIG0, QrySuccess, QryAuthAns, QryNoauthAns, QryReferral,
+ * QryNxrrset, QrySERVFAIL, QryFORMERR, QryNXDOMAIN, QryRecursion,
+ * QryDuplicate, QryDropped, QryFailure, XfrReqDone, UpdateReqFwd,
+ * UpdateRespFwd, UpdateFwdFail, UpdateDone, UpdateFail,
+ * UpdateBadPrereq
+ * Layout v1:
+ * <nsstats>
+ * <Requestv4>1</Requestv4>
+ * <Requestv6>0</Requestv6>
+ * :
+ * </nsstats>
+ * Layout v2:
+ * <nsstat>
+ * <name>Requestv4</name>
+ * <counter>1</counter>
+ * </nsstat>
+ * <nsstat>
+ * <name>Requestv6</name>
+ * <counter>0</counter>
+ * </nsstat>
+ * :
+ */
+ if (PARSE_NSSTATS)
+ {
+ translation_table_ptr_t table_ptr =
+ {
+ nsstats_translation_table,
+ nsstats_translation_table_length,
+ /* plugin_instance = */ "nsstats"
+ };
+
+ if (version == 1)
+ {
+ bind_parse_generic_value_list ("server/nsstats",
+ /* callback = */ bind_xml_table_callback,
+ /* user_data = */ &table_ptr,
+ doc, xpathCtx, current_time);
+ }
+ else
+ {
+ bind_parse_generic_name_value ("server/nsstat",
+ /* callback = */ bind_xml_table_callback,
+ /* user_data = */ &table_ptr,
+ doc, xpathCtx, current_time);
+ }
+ }
+
+ /* XPath: server/zonestats, server/zonestat
+ * Variables: NotifyOutv4, NotifyOutv6, NotifyInv4, NotifyInv6, NotifyRej,
+ * SOAOutv4, SOAOutv6, AXFRReqv4, AXFRReqv6, IXFRReqv4, IXFRReqv6,
+ * XfrSuccess, XfrFail
+ * Layout v1:
+ * <zonestats>
+ * <NotifyOutv4>0</NotifyOutv4>
+ * <NotifyOutv6>0</NotifyOutv6>
+ * :
+ * </zonestats>
+ * Layout v2:
+ * <zonestat>
+ * <name>NotifyOutv4</name>
+ * <counter>0</counter>
+ * </zonestat>
+ * <zonestat>
+ * <name>NotifyOutv6</name>
+ * <counter>0</counter>
+ * </zonestat>
+ * :
+ */
+ if (PARSE_ZONESTATS)
+ {
+ translation_table_ptr_t table_ptr =
+ {
+ zonestats_translation_table,
+ zonestats_translation_table_length,
+ /* plugin_instance = */ "zonestats"
+ };
+
+ if (version == 1)
+ {
+ bind_parse_generic_value_list ("server/zonestats",
+ /* callback = */ bind_xml_table_callback,
+ /* user_data = */ &table_ptr,
+ doc, xpathCtx, current_time);
+ }
+ else
+ {
+ bind_parse_generic_name_value ("server/zonestat",
+ /* callback = */ bind_xml_table_callback,
+ /* user_data = */ &table_ptr,
+ doc, xpathCtx, current_time);
+ }
+ }
+
+ /* XPath: server/resstats
+ * Variables: Queryv4, Queryv6, Responsev4, Responsev6, NXDOMAIN, SERVFAIL,
+ * FORMERR, OtherError, EDNS0Fail, Mismatch, Truncated, Lame,
+ * Retry, GlueFetchv4, GlueFetchv6, GlueFetchv4Fail,
+ * GlueFetchv6Fail, ValAttempt, ValOk, ValNegOk, ValFail
+ * Layout v1:
+ * <resstats>
+ * <Queryv4>0</Queryv4>
+ * <Queryv6>0</Queryv6>
+ * :
+ * </resstats>
+ * Layout v2:
+ * <resstat>
+ * <name>Queryv4</name>
+ * <counter>0</counter>
+ * </resstat>
+ * <resstat>
+ * <name>Queryv6</name>
+ * <counter>0</counter>
+ * </resstat>
+ * :
+ */
+ if (PARSE_RESSTATS)
+ {
+ translation_table_ptr_t table_ptr =
+ {
+ resstats_translation_table,
+ resstats_translation_table_length,
+ /* plugin_instance = */ "resstats"
+ };
+
+ if (version == 1)
+ {
+ bind_parse_generic_value_list ("server/resstats",
+ /* callback = */ bind_xml_table_callback,
+ /* user_data = */ &table_ptr,
+ doc, xpathCtx, current_time);
+ }
+ else
+ {
+ bind_parse_generic_name_value ("server/resstat",
+ /* callback = */ bind_xml_table_callback,
+ /* user_data = */ &table_ptr,
+ doc, xpathCtx, current_time);
+ }
+ }
+
+ return 0;
+} /* int bind_xml_stats */
+
+static int bind_xml (const char *data)
+{
+ xmlDoc *doc = NULL;
+ xmlXPathContext *xpathCtx = NULL;
+ xmlXPathObject *xpathObj = NULL;
+ int ret = -1;
+ int i;
+
+ doc = xmlParseMemory (data, strlen (data));
+ if (doc == NULL)
+ {
+ ERROR ("bind plugin: xmlParseMemory failed.");
+ return (-1);
+ }
+
+ xpathCtx = xmlXPathNewContext (doc);
+ if (xpathCtx == NULL)
+ {
+ ERROR ("bind plugin: xmlXPathNewContext failed.");
+ xmlFreeDoc (doc);
+ return (-1);
+ }
+
+ xpathObj = xmlXPathEvalExpression (BAD_CAST "/isc/bind/statistics", xpathCtx);
+ if (xpathObj == NULL)
+ {
+ ERROR ("bind plugin: Cannot find the <statistics> tag.");
+ xmlXPathFreeContext (xpathCtx);
+ xmlFreeDoc (doc);
+ return (-1);
+ }
+ else if (xpathObj->nodesetval == NULL)
+ {
+ ERROR ("bind plugin: xmlXPathEvalExpression failed.");
+ xmlXPathFreeObject (xpathObj);
+ xmlXPathFreeContext (xpathCtx);
+ xmlFreeDoc (doc);
+ return (-1);
+ }
+
+ for (i = 0; i < xpathObj->nodesetval->nodeNr; i++)
+ {
+ xmlNode *node;
+ char *attr_version;
+ int parsed_version = 0;
+
+ node = xpathObj->nodesetval->nodeTab[i];
+ assert (node != NULL);
+
+ attr_version = (char *) xmlGetProp (node, BAD_CAST "version");
+ if (attr_version == NULL)
+ {
+ NOTICE ("bind plugin: Found <statistics> tag doesn't have a "
+ "`version' attribute.");
+ continue;
+ }
+ DEBUG ("bind plugin: Found: <statistics version=\"%s\">", attr_version);
+
+ /* At the time this plugin was written, version "1.0" was used by
+ * BIND 9.5.0, version "2.0" was used by BIND 9.5.1 and 9.6.0. We assume
+ * that "1.*" and "2.*" don't introduce structural changes, so we just
+ * check for the first two characters here. */
+ if (strncmp ("1.", attr_version, strlen ("1.")) == 0)
+ parsed_version = 1;
+ else if (strncmp ("2.", attr_version, strlen ("2.")) == 0)
+ parsed_version = 2;
+ else
+ {
+ /* TODO: Use the complaint mechanism here. */
+ NOTICE ("bind plugin: Found <statistics> tag with version `%s'. "
+ "Unfortunately I have no clue how to parse that. "
+ "Please open a bug report for this.", attr_version);
+ xmlFree (attr_version);
+ continue;
+ }
+
+ ret = bind_xml_stats (parsed_version,
+ doc, xpathCtx, node);
+
+ xmlFree (attr_version);
+ /* One <statistics> node ought to be enough. */
+ break;
+ }
+
+ xmlXPathFreeObject (xpathObj);
+ xmlXPathFreeContext (xpathCtx);
+ xmlFreeDoc (doc);
+
+ return (ret);
+} /* int bind_xml */
+
+static int config_set_str (char **var, const char *value)
+{
+ if (*var != NULL)
+ {
+ free (*var);
+ *var = NULL;
+ }
+
+ if ((*var = strdup (value)) == NULL)
+ return (-1);
+ else
+ return (0);
+} /* int config_set_str */
+
+static int config_set_bool (int *var, const char *value)
+{
+ if (IS_TRUE (value))
+ *var = 1;
+ else if (IS_FALSE (value))
+ *var = 0;
+ else
+ return -1;
+ return 0;
+} /* int config_set_bool */
+
+static int bind_config (const char *key, const char *value)
+{
+ if (strcasecmp (key, "URL") == 0)
+ return (config_set_str (&url, value));
+ else if (strcasecmp (key, "Requests") == 0)
+ return (config_set_bool (&use_requests, value));
+ else if (strcasecmp (key, "Rejects") == 0)
+ return (config_set_bool (&use_rejects, value));
+ else if (strcasecmp (key, "Responses") == 0)
+ return (config_set_bool (&use_responses, value));
+ else if (strcasecmp (key, "Queries") == 0)
+ return (config_set_bool (&use_queries, value));
+ else if (strcasecmp (key, "RCode") == 0)
+ return (config_set_bool (&use_rcode, value));
+ else if (strcasecmp (key, "ZoneStats") == 0)
+ return (config_set_bool (&use_zonestats, value));
+ else if (strcasecmp (key, "OpCodes") == 0)
+ return (config_set_bool (&use_opcode, value));
+ else if (strcasecmp (key, "Resolver") == 0)
+ return (config_set_bool (&use_resolver, value));
+ else if (strcasecmp (key, "DNSSEC") == 0)
+ return (config_set_bool (&use_dnssec, value));
+
+ else if (strcasecmp (key, "RRQueriesIn") == 0)
+ return (config_set_bool (&use_rrqueries_in, value));
+ else if (strcasecmp (key, "QueryResults") == 0)
+ return (config_set_bool (&use_query_results, value));
+ else if (strcasecmp (key, "Updates") == 0)
+ return (config_set_bool (&use_updates, value));
+ else if (strcasecmp (key, "ZoneMaintenance") == 0)
+ return (config_set_bool (&use_zone_maint, value));
+
+ else
+ return (-1);
+} /* int bind_config */
+
+static int bind_init (void)
+{
+ if (curl != NULL)
+ return (0);
+
+ curl = curl_easy_init ();
+ if (curl == NULL)
+ {
+ ERROR ("bind plugin: bind_init: curl_easy_init failed.");
+ return (-1);
+ }
+
+ curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, bind_curl_callback);
+ curl_easy_setopt (curl, CURLOPT_USERAGENT, PACKAGE_NAME"/"PACKAGE_VERSION);
+ curl_easy_setopt (curl, CURLOPT_ERRORBUFFER, bind_curl_error);
+ curl_easy_setopt (curl, CURLOPT_URL, (url != NULL) ? url : BIND_DEFAULT_URL);
+
+ return (0);
+} /* int bind_init */
+
+static int bind_read (void)
+{
+ int status;
+
+ if (curl == NULL)
+ {
+ ERROR ("bind plugin: I don't have a CURL object.");
+ return (-1);
+ }
+
+ bind_buffer_fill = 0;
+ if (curl_easy_perform (curl) != 0)
+ {
+ ERROR ("bind plugin: curl_easy_perform failed: %s",
+ bind_curl_error);
+ return (-1);
+ }
+
+ status = bind_xml (bind_buffer);
+ if (status != 0)
+ return (-1);
+ else
+ return (0);
+} /* int bind_read */
+
+static int bind_shutdown (void)
+{
+ if (curl != NULL)
+ {
+ curl_easy_cleanup (curl);
+ curl = NULL;
+ }
+
+ return (0);
+} /* int bind_shutdown */
+
+void module_register (void)
+{
+ plugin_register_config ("bind", bind_config, config_keys, config_keys_num);
+ plugin_register_init ("bind", bind_init);
+ plugin_register_read ("bind", bind_read);
+ plugin_register_shutdown ("bind", bind_shutdown);
+} /* void module_register */
+
+/* vim: set sw=2 sts=2 ts=8 et fdm=marker : */
projects / collectd.git / commitdiff