-/**
- * collectd - src/network.c
- * Copyright (C) 2005-2013 Florian octo Forster
- * Copyright (C) 2009 Aman Gupta
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; only version 2.1 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser 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:
- * Florian octo Forster <octo at collectd.org>
- * Aman Gupta <aman at tmm1.net>
- **/
-
-#define _DEFAULT_SOURCE
-#define _BSD_SOURCE /* For struct ip_mreq */
-
-#include "collectd.h"
-
-#include "common.h"
-#include "plugin.h"
-#include "utils_cache.h"
-#include "utils_complain.h"
-#include "utils_fbhash.h"
-
-#include "network.h"
-
-#if HAVE_NETDB_H
-#include <netdb.h>
-#endif
-#if HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-#if HAVE_ARPA_INET_H
-#include <arpa/inet.h>
-#endif
-#if HAVE_POLL_H
-#include <poll.h>
-#endif
-#if HAVE_NET_IF_H
-#include <net/if.h>
-#endif
-
-#if HAVE_GCRYPT_H
-#if defined __APPLE__
-/* default xcode compiler throws warnings even when deprecated functionality
- * is not used. -Werror breaks the build because of erroneous warnings.
- * http://stackoverflow.com/questions/10556299/compiler-warnings-with-libgcrypt-v1-5-0/12830209#12830209
- */
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-#endif
-/* FreeBSD's copy of libgcrypt extends the existing GCRYPT_NO_DEPRECATED
- * to properly hide all deprecated functionality.
- * http://svnweb.freebsd.org/ports/head/security/libgcrypt/files/patch-src__gcrypt.h.in
- */
-#define GCRYPT_NO_DEPRECATED
-#include <gcrypt.h>
-#if defined __APPLE__
-/* Re enable deprecation warnings */
-#pragma GCC diagnostic warning "-Wdeprecated-declarations"
-#endif
-#if GCRYPT_VERSION_NUMBER < 0x010600
-GCRY_THREAD_OPTION_PTHREAD_IMPL;
-#endif
-#endif
-
-#ifndef IPV6_ADD_MEMBERSHIP
-#ifdef IPV6_JOIN_GROUP
-#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
-#else
-#error "Neither IP_ADD_MEMBERSHIP nor IPV6_JOIN_GROUP is defined"
-#endif
-#endif /* !IP_ADD_MEMBERSHIP */
-
-/*
- * Maximum size required for encryption / signing:
- *
- * 42 bytes for the encryption header
- * + 64 bytes for the username
- * -----------
- * = 106 bytes
- */
-#define BUFF_SIG_SIZE 106
-
-/*
- * Private data types
- */
-#define SECURITY_LEVEL_NONE 0
-#if HAVE_GCRYPT_H
-#define SECURITY_LEVEL_SIGN 1
-#define SECURITY_LEVEL_ENCRYPT 2
-#endif
-struct sockent_client {
- int fd;
- struct sockaddr_storage *addr;
- socklen_t addrlen;
-#if HAVE_GCRYPT_H
- int security_level;
- char *username;
- char *password;
- gcry_cipher_hd_t cypher;
- unsigned char password_hash[32];
-#endif
- cdtime_t next_resolve_reconnect;
- cdtime_t resolve_interval;
- struct sockaddr_storage *bind_addr;
-};
-
-struct sockent_server {
- int *fd;
- size_t fd_num;
-#if HAVE_GCRYPT_H
- int security_level;
- char *auth_file;
- fbhash_t *userdb;
- gcry_cipher_hd_t cypher;
-#endif
-};
-
-typedef struct sockent {
-#define SOCKENT_TYPE_CLIENT 1
-#define SOCKENT_TYPE_SERVER 2
- int type;
-
- char *node;
- char *service;
- int interface;
-
- union {
- struct sockent_client client;
- struct sockent_server server;
- } data;
-
- struct sockent *next;
-} sockent_t;
-
-/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-------+-----------------------+-------------------------------+
- * ! Ver. ! ! Length !
- * +-------+-----------------------+-------------------------------+
- */
-struct part_header_s {
- uint16_t type;
- uint16_t length;
-};
-typedef struct part_header_s part_header_t;
-
-/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-------------------------------+-------------------------------+
- * ! Type ! Length !
- * +-------------------------------+-------------------------------+
- * : (Length - 4) Bytes :
- * +---------------------------------------------------------------+
- */
-struct part_string_s {
- part_header_t *head;
- char *value;
-};
-typedef struct part_string_s part_string_t;
-
-/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-------------------------------+-------------------------------+
- * ! Type ! Length !
- * +-------------------------------+-------------------------------+
- * : (Length - 4 == 2 || 4 || 8) Bytes :
- * +---------------------------------------------------------------+
- */
-struct part_number_s {
- part_header_t *head;
- uint64_t *value;
-};
-typedef struct part_number_s part_number_t;
-
-/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-------------------------------+-------------------------------+
- * ! Type ! Length !
- * +-------------------------------+---------------+---------------+
- * ! Num of values ! Type0 ! Type1 !
- * +-------------------------------+---------------+---------------+
- * ! Value0 !
- * ! !
- * +---------------------------------------------------------------+
- * ! Value1 !
- * ! !
- * +---------------------------------------------------------------+
- */
-struct part_values_s {
- part_header_t *head;
- uint16_t *num_values;
- uint8_t *values_types;
- value_t *values;
-};
-typedef struct part_values_s part_values_t;
-
-/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-------------------------------+-------------------------------+
- * ! Type ! Length !
- * +-------------------------------+-------------------------------+
- * ! Hash (Bits 0 - 31) !
- * : : :
- * ! Hash (Bits 224 - 255) !
- * +---------------------------------------------------------------+
- */
-/* Minimum size */
-#define PART_SIGNATURE_SHA256_SIZE 36
-struct part_signature_sha256_s {
- part_header_t head;
- unsigned char hash[32];
- char *username;
-};
-typedef struct part_signature_sha256_s part_signature_sha256_t;
-
-/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- * +-------------------------------+-------------------------------+
- * ! Type ! Length !
- * +-------------------------------+-------------------------------+
- * ! Original length ! Padding (0 - 15 bytes) !
- * +-------------------------------+-------------------------------+
- * ! Hash (Bits 0 - 31) !
- * : : :
- * ! Hash (Bits 128 - 159) !
- * +---------------------------------------------------------------+
- */
-/* Minimum size */
-#define PART_ENCRYPTION_AES256_SIZE 42
-struct part_encryption_aes256_s {
- part_header_t head;
- uint16_t username_length;
- char *username;
- unsigned char iv[16];
- /* <encrypted> */
- unsigned char hash[20];
- /* <payload /> */
- /* </encrypted> */
-};
-typedef struct part_encryption_aes256_s part_encryption_aes256_t;
-
-struct receive_list_entry_s {
- char *data;
- int data_len;
- int fd;
- struct receive_list_entry_s *next;
-};
-typedef struct receive_list_entry_s receive_list_entry_t;
-
-/*
- * Private variables
- */
-static int network_config_ttl;
-/* Ethernet - (IPv6 + UDP) = 1500 - (40 + 8) = 1452 */
-static size_t network_config_packet_size = 1452;
-static bool network_config_forward;
-static bool network_config_stats;
-
-static sockent_t *sending_sockets;
-
-static receive_list_entry_t *receive_list_head;
-static receive_list_entry_t *receive_list_tail;
-static pthread_mutex_t receive_list_lock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t receive_list_cond = PTHREAD_COND_INITIALIZER;
-static uint64_t receive_list_length;
-
-static sockent_t *listen_sockets;
-static struct pollfd *listen_sockets_pollfd;
-static size_t listen_sockets_num;
-
-/* The receive and dispatch threads will run as long as `listen_loop' is set to
- * zero. */
-static int listen_loop;
-static int receive_thread_running;
-static pthread_t receive_thread_id;
-static int dispatch_thread_running;
-static pthread_t dispatch_thread_id;
-
-/* Buffer in which to-be-sent network packets are constructed. */
-static char *send_buffer;
-static char *send_buffer_ptr;
-static int send_buffer_fill;
-static cdtime_t send_buffer_last_update;
-static value_list_t send_buffer_vl = VALUE_LIST_INIT;
-static pthread_mutex_t send_buffer_lock = PTHREAD_MUTEX_INITIALIZER;
-
-/* XXX: These counters are incremented from one place only. The spot in which
- * the values are incremented is either only reachable by one thread (the
- * dispatch thread, for example) or locked by some lock (send_buffer_lock for
- * example). Only if neither is true, the stats_lock is acquired. The counters
- * are always read without holding a lock in the hope that writing 8 bytes to
- * memory is an atomic operation. */
-static derive_t stats_octets_rx;
-static derive_t stats_octets_tx;
-static derive_t stats_packets_rx;
-static derive_t stats_packets_tx;
-static derive_t stats_values_dispatched;
-static derive_t stats_values_not_dispatched;
-static derive_t stats_values_sent;
-static derive_t stats_values_not_sent;
-static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
-
-/*
- * Private functions
- */
-static bool check_receive_okay(const value_list_t *vl) /* {{{ */
-{
- uint64_t time_sent = 0;
- int status;
-
- status = uc_meta_data_get_unsigned_int(vl, "network:time_sent", &time_sent);
-
- /* This is a value we already sent. Don't allow it to be received again in
- * order to avoid looping. */
- if ((status == 0) && (time_sent >= ((uint64_t)vl->time)))
- return 0;
-
- return 1;
-} /* }}} bool check_receive_okay */
-
-static bool check_send_okay(const value_list_t *vl) /* {{{ */
-{
- bool received = 0;
- int status;
-
- if (network_config_forward)
- return 1;
-
- if (vl->meta == NULL)
- return 1;
-
- status = meta_data_get_boolean(vl->meta, "network:received", &received);
- if (status == -ENOENT)
- return 1;
- else if (status != 0) {
- ERROR("network plugin: check_send_okay: meta_data_get_boolean failed "
- "with status %i.",
- status);
- return 1;
- }
-
- /* By default, only *send* value lists that were not *received* by the
- * network plugin. */
- return !received;
-} /* }}} bool check_send_okay */
-
-static bool check_notify_received(const notification_t *n) /* {{{ */
-{
- for (notification_meta_t *ptr = n->meta; ptr != NULL; ptr = ptr->next)
- if ((strcmp("network:received", ptr->name) == 0) &&
- (ptr->type == NM_TYPE_BOOLEAN))
- return (bool)ptr->nm_value.nm_boolean;
-
- return 0;
-} /* }}} bool check_notify_received */
-
-static bool check_send_notify_okay(const notification_t *n) /* {{{ */
-{
- static c_complain_t complain_forwarding = C_COMPLAIN_INIT_STATIC;
- bool received = 0;
-
- if (n->meta == NULL)
- return 1;
-
- received = check_notify_received(n);
-
- if (network_config_forward && received) {
- c_complain_once(
- LOG_ERR, &complain_forwarding,
- "network plugin: A notification has been received via the network "
- "and forwarding is enabled. Forwarding of notifications is currently "
- "not supported, because there is not loop-deteciton available. "
- "Please contact the collectd mailing list if you need this "
- "feature.");
- }
-
- /* By default, only *send* value lists that were not *received* by the
- * network plugin. */
- return !received;
-} /* }}} bool check_send_notify_okay */
-
-static int network_dispatch_values(value_list_t *vl, /* {{{ */
- const char *username) {
- int status;
-
- if ((vl->time == 0) || (strlen(vl->host) == 0) || (strlen(vl->plugin) == 0) ||
- (strlen(vl->type) == 0))
- return -EINVAL;
-
- if (!check_receive_okay(vl)) {
-#if COLLECT_DEBUG
- char name[6 * DATA_MAX_NAME_LEN];
- FORMAT_VL(name, sizeof(name), vl);
- name[sizeof(name) - 1] = 0;
- DEBUG("network plugin: network_dispatch_values: "
- "NOT dispatching %s.",
- name);
-#endif
- stats_values_not_dispatched++;
- return 0;
- }
-
- assert(vl->meta == NULL);
-
- vl->meta = meta_data_create();
- if (vl->meta == NULL) {
- ERROR("network plugin: meta_data_create failed.");
- return -ENOMEM;
- }
-
- status = meta_data_add_boolean(vl->meta, "network:received", 1);
- if (status != 0) {
- ERROR("network plugin: meta_data_add_boolean failed.");
- meta_data_destroy(vl->meta);
- vl->meta = NULL;
- return status;
- }
-
- if (username != NULL) {
- status = meta_data_add_string(vl->meta, "network:username", username);
- if (status != 0) {
- ERROR("network plugin: meta_data_add_string failed.");
- meta_data_destroy(vl->meta);
- vl->meta = NULL;
- return status;
- }
- }
-
- plugin_dispatch_values(vl);
- stats_values_dispatched++;
-
- meta_data_destroy(vl->meta);
- vl->meta = NULL;
-
- return 0;
-} /* }}} int network_dispatch_values */
-
-static int network_dispatch_notification(notification_t *n) /* {{{ */
-{
- int status;
-
- assert(n->meta == NULL);
-
- status = plugin_notification_meta_add_boolean(n, "network:received", 1);
- if (status != 0) {
- ERROR("network plugin: plugin_notification_meta_add_boolean failed.");
- plugin_notification_meta_free(n->meta);
- n->meta = NULL;
- return status;
- }
-
- status = plugin_dispatch_notification(n);
-
- plugin_notification_meta_free(n->meta);
- n->meta = NULL;
-
- return status;
-} /* }}} int network_dispatch_notification */
-
-#if HAVE_GCRYPT_H
-static int network_init_gcrypt(void) /* {{{ */
-{
- gcry_error_t err;
-
- /* http://lists.gnupg.org/pipermail/gcrypt-devel/2003-August/000458.html
- * Because you can't know in a library whether another library has
- * already initialized the library */
- if (gcry_control(GCRYCTL_ANY_INITIALIZATION_P))
- return 0;
-
-/* http://www.gnupg.org/documentation/manuals/gcrypt/Multi_002dThreading.html
- * To ensure thread-safety, it's important to set GCRYCTL_SET_THREAD_CBS
- * *before* initalizing Libgcrypt with gcry_check_version(), which itself must
- * be called before any other gcry_* function. GCRYCTL_ANY_INITIALIZATION_P
- * above doesn't count, as it doesn't implicitly initalize Libgcrypt.
- *
- * tl;dr: keep all these gry_* statements in this exact order please. */
-#if GCRYPT_VERSION_NUMBER < 0x010600
- err = gcry_control(GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread);
- if (err) {
- ERROR("network plugin: gcry_control (GCRYCTL_SET_THREAD_CBS) failed: %s",
- gcry_strerror(err));
- return -1;
- }
-#endif
-
- gcry_check_version(NULL);
-
- err = gcry_control(GCRYCTL_INIT_SECMEM, 32768);
- if (err) {
- ERROR("network plugin: gcry_control (GCRYCTL_INIT_SECMEM) failed: %s",
- gcry_strerror(err));
- return -1;
- }
-
- gcry_control(GCRYCTL_INITIALIZATION_FINISHED);
- return 0;
-} /* }}} int network_init_gcrypt */
-
-static gcry_cipher_hd_t network_get_aes256_cypher(sockent_t *se, /* {{{ */
- const void *iv,
- size_t iv_size,
- const char *username) {
- gcry_error_t err;
- gcry_cipher_hd_t *cyper_ptr;
- unsigned char password_hash[32];
-
- if (se->type == SOCKENT_TYPE_CLIENT) {
- cyper_ptr = &se->data.client.cypher;
- memcpy(password_hash, se->data.client.password_hash, sizeof(password_hash));
- } else {
- char *secret;
-
- cyper_ptr = &se->data.server.cypher;
-
- if (username == NULL)
- return NULL;
-
- secret = fbh_get(se->data.server.userdb, username);
- if (secret == NULL)
- return NULL;
-
- gcry_md_hash_buffer(GCRY_MD_SHA256, password_hash, secret, strlen(secret));
-
- sfree(secret);
- }
-
- if (*cyper_ptr == NULL) {
- err = gcry_cipher_open(cyper_ptr, GCRY_CIPHER_AES256, GCRY_CIPHER_MODE_OFB,
- /* flags = */ 0);
- if (err != 0) {
- ERROR("network plugin: gcry_cipher_open returned: %s",
- gcry_strerror(err));
- *cyper_ptr = NULL;
- return NULL;
- }
- } else {
- gcry_cipher_reset(*cyper_ptr);
- }
- assert(*cyper_ptr != NULL);
-
- err = gcry_cipher_setkey(*cyper_ptr, password_hash, sizeof(password_hash));
- if (err != 0) {
- ERROR("network plugin: gcry_cipher_setkey returned: %s",
- gcry_strerror(err));
- gcry_cipher_close(*cyper_ptr);
- *cyper_ptr = NULL;
- return NULL;
- }
-
- err = gcry_cipher_setiv(*cyper_ptr, iv, iv_size);
- if (err != 0) {
- ERROR("network plugin: gcry_cipher_setkey returned: %s",
- gcry_strerror(err));
- gcry_cipher_close(*cyper_ptr);
- *cyper_ptr = NULL;
- return NULL;
- }
-
- return *cyper_ptr;
-} /* }}} int network_get_aes256_cypher */
-#endif /* HAVE_GCRYPT_H */
-
-static int write_part_values(char **ret_buffer, size_t *ret_buffer_len,
- const data_set_t *ds, const value_list_t *vl) {
- char *packet_ptr;
- size_t packet_len;
- int num_values;
-
- part_header_t pkg_ph;
- uint16_t pkg_num_values;
- uint8_t *pkg_values_types;
- value_t *pkg_values;
-
- size_t offset;
-
- num_values = vl->values_len;
- packet_len = sizeof(part_header_t) + sizeof(uint16_t) +
- (num_values * sizeof(uint8_t)) + (num_values * sizeof(value_t));
-
- if (*ret_buffer_len < packet_len)
- return -1;
-
- pkg_values_types = malloc(num_values * sizeof(*pkg_values_types));
- if (pkg_values_types == NULL) {
- ERROR("network plugin: write_part_values: malloc failed.");
- return -1;
- }
-
- pkg_values = malloc(num_values * sizeof(*pkg_values));
- if (pkg_values == NULL) {
- free(pkg_values_types);
- ERROR("network plugin: write_part_values: malloc failed.");
- return -1;
- }
-
- pkg_ph.type = htons(TYPE_VALUES);
- pkg_ph.length = htons(packet_len);
-
- pkg_num_values = htons((uint16_t)vl->values_len);
-
- for (int i = 0; i < num_values; i++) {
- pkg_values_types[i] = (uint8_t)ds->ds[i].type;
- switch (ds->ds[i].type) {
- case DS_TYPE_COUNTER:
- pkg_values[i].counter = htonll(vl->values[i].counter);
- break;
-
- case DS_TYPE_GAUGE:
- pkg_values[i].gauge = htond(vl->values[i].gauge);
- break;
-
- case DS_TYPE_DERIVE:
- pkg_values[i].derive = htonll(vl->values[i].derive);
- break;
-
- case DS_TYPE_ABSOLUTE:
- pkg_values[i].absolute = htonll(vl->values[i].absolute);
- break;
-
- default:
- free(pkg_values_types);
- free(pkg_values);
- ERROR("network plugin: write_part_values: "
- "Unknown data source type: %i",
- ds->ds[i].type);
- return -1;
- } /* switch (ds->ds[i].type) */
- } /* for (num_values) */
-
- /*
- * Use `memcpy' to write everything to the buffer, because the pointer
- * may be unaligned and some architectures, such as SPARC, can't handle
- * that.
- */
- packet_ptr = *ret_buffer;
- offset = 0;
- memcpy(packet_ptr + offset, &pkg_ph, sizeof(pkg_ph));
- offset += sizeof(pkg_ph);
- memcpy(packet_ptr + offset, &pkg_num_values, sizeof(pkg_num_values));
- offset += sizeof(pkg_num_values);
- memcpy(packet_ptr + offset, pkg_values_types, num_values * sizeof(uint8_t));
- offset += num_values * sizeof(uint8_t);
- memcpy(packet_ptr + offset, pkg_values, num_values * sizeof(value_t));
- offset += num_values * sizeof(value_t);
-
- assert(offset == packet_len);
-
- *ret_buffer = packet_ptr + packet_len;
- *ret_buffer_len -= packet_len;
-
- free(pkg_values_types);
- free(pkg_values);
-
- return 0;
-} /* int write_part_values */
-
-static int write_part_number(char **ret_buffer, size_t *ret_buffer_len,
- int type, uint64_t value) {
- char *packet_ptr;
- size_t packet_len;
-
- part_header_t pkg_head;
- uint64_t pkg_value;
-
- size_t offset;
-
- packet_len = sizeof(pkg_head) + sizeof(pkg_value);
-
- if (*ret_buffer_len < packet_len)
- return -1;
-
- pkg_head.type = htons(type);
- pkg_head.length = htons(packet_len);
- pkg_value = htonll(value);
-
- packet_ptr = *ret_buffer;
- offset = 0;
- memcpy(packet_ptr + offset, &pkg_head, sizeof(pkg_head));
- offset += sizeof(pkg_head);
- memcpy(packet_ptr + offset, &pkg_value, sizeof(pkg_value));
- offset += sizeof(pkg_value);
-
- assert(offset == packet_len);
-
- *ret_buffer = packet_ptr + packet_len;
- *ret_buffer_len -= packet_len;
-
- return 0;
-} /* int write_part_number */
-
-static int write_part_string(char **ret_buffer, size_t *ret_buffer_len,
- int type, const char *str, size_t str_len) {
- char *buffer;
- size_t buffer_len;
-
- uint16_t pkg_type;
- uint16_t pkg_length;
-
- size_t offset;
-
- buffer_len = 2 * sizeof(uint16_t) + str_len + 1;
- if (*ret_buffer_len < buffer_len)
- return -1;
-
- pkg_type = htons(type);
- pkg_length = htons(buffer_len);
-
- buffer = *ret_buffer;
- offset = 0;
- memcpy(buffer + offset, (void *)&pkg_type, sizeof(pkg_type));
- offset += sizeof(pkg_type);
- memcpy(buffer + offset, (void *)&pkg_length, sizeof(pkg_length));
- offset += sizeof(pkg_length);
- memcpy(buffer + offset, str, str_len);
- offset += str_len;
- memset(buffer + offset, '\0', 1);
- offset += 1;
-
- assert(offset == buffer_len);
-
- *ret_buffer = buffer + buffer_len;
- *ret_buffer_len -= buffer_len;
-
- return 0;
-} /* int write_part_string */
-
-static int parse_part_values(void **ret_buffer, size_t *ret_buffer_len,
- value_t **ret_values, size_t *ret_num_values) {
- char *buffer = *ret_buffer;
- size_t buffer_len = *ret_buffer_len;
-
- uint16_t tmp16;
- size_t exp_size;
-
- uint16_t pkg_length;
- uint16_t pkg_type;
- size_t pkg_numval;
-
- uint8_t *pkg_types;
- value_t *pkg_values;
-
- if (buffer_len < 15) {
- NOTICE("network plugin: packet is too short: "
- "buffer_len = %" PRIsz,
- buffer_len);
- return -1;
- }
-
- memcpy((void *)&tmp16, buffer, sizeof(tmp16));
- buffer += sizeof(tmp16);
- pkg_type = ntohs(tmp16);
-
- memcpy((void *)&tmp16, buffer, sizeof(tmp16));
- buffer += sizeof(tmp16);
- pkg_length = ntohs(tmp16);
-
- memcpy((void *)&tmp16, buffer, sizeof(tmp16));
- buffer += sizeof(tmp16);
- pkg_numval = (size_t)ntohs(tmp16);
-
- assert(pkg_type == TYPE_VALUES);
-
- exp_size =
- 3 * sizeof(uint16_t) + pkg_numval * (sizeof(uint8_t) + sizeof(value_t));
- if (buffer_len < exp_size) {
- WARNING("network plugin: parse_part_values: "
- "Packet too short: "
- "Chunk of size %" PRIsz " expected, "
- "but buffer has only %" PRIsz " bytes left.",
- exp_size, buffer_len);
- return -1;
- }
- assert(pkg_numval <= ((buffer_len - 6) / 9));
-
- if (pkg_length != exp_size) {
- WARNING("network plugin: parse_part_values: "
- "Length and number of values "
- "in the packet don't match.");
- return -1;
- }
-
- pkg_types = calloc(pkg_numval, sizeof(*pkg_types));
- pkg_values = calloc(pkg_numval, sizeof(*pkg_values));
- if ((pkg_types == NULL) || (pkg_values == NULL)) {
- sfree(pkg_types);
- sfree(pkg_values);
- ERROR("network plugin: parse_part_values: calloc failed.");
- return -1;
- }
-
- memcpy(pkg_types, buffer, pkg_numval * sizeof(*pkg_types));
- buffer += pkg_numval * sizeof(*pkg_types);
- memcpy(pkg_values, buffer, pkg_numval * sizeof(*pkg_values));
- buffer += pkg_numval * sizeof(*pkg_values);
-
- for (size_t i = 0; i < pkg_numval; i++) {
- switch (pkg_types[i]) {
- case DS_TYPE_COUNTER:
- pkg_values[i].counter = (counter_t)ntohll(pkg_values[i].counter);
- break;
-
- case DS_TYPE_GAUGE:
- pkg_values[i].gauge = (gauge_t)ntohd(pkg_values[i].gauge);
- break;
-
- case DS_TYPE_DERIVE:
- pkg_values[i].derive = (derive_t)ntohll(pkg_values[i].derive);
- break;
-
- case DS_TYPE_ABSOLUTE:
- pkg_values[i].absolute = (absolute_t)ntohll(pkg_values[i].absolute);
- break;
-
- default:
- NOTICE("network plugin: parse_part_values: "
- "Don't know how to handle data source type %" PRIu8,
- pkg_types[i]);
- sfree(pkg_types);
- sfree(pkg_values);
- return -1;
- } /* switch (pkg_types[i]) */
- }
-
- *ret_buffer = buffer;
- *ret_buffer_len = buffer_len - pkg_length;
- *ret_num_values = pkg_numval;
- *ret_values = pkg_values;
-
- sfree(pkg_types);
-
- return 0;
-} /* int parse_part_values */
-
-static int parse_part_number(void **ret_buffer, size_t *ret_buffer_len,
- uint64_t *value) {
- char *buffer = *ret_buffer;
- size_t buffer_len = *ret_buffer_len;
-
- uint16_t tmp16;
- uint64_t tmp64;
- size_t exp_size = 2 * sizeof(uint16_t) + sizeof(uint64_t);
-
- uint16_t pkg_length;
-
- if (buffer_len < exp_size) {
- WARNING("network plugin: parse_part_number: "
- "Packet too short: "
- "Chunk of size %" PRIsz " expected, "
- "but buffer has only %" PRIsz " bytes left.",
- exp_size, buffer_len);
- return -1;
- }
-
- memcpy((void *)&tmp16, buffer, sizeof(tmp16));
- buffer += sizeof(tmp16);
- /* pkg_type = ntohs (tmp16); */
-
- memcpy((void *)&tmp16, buffer, sizeof(tmp16));
- buffer += sizeof(tmp16);
- pkg_length = ntohs(tmp16);
-
- memcpy((void *)&tmp64, buffer, sizeof(tmp64));
- buffer += sizeof(tmp64);
- *value = ntohll(tmp64);
-
- *ret_buffer = buffer;
- *ret_buffer_len = buffer_len - pkg_length;
-
- return 0;
-} /* int parse_part_number */
-
-static int parse_part_string(void **ret_buffer, size_t *ret_buffer_len,
- char *output, size_t const output_len) {
- char *buffer = *ret_buffer;
- size_t buffer_len = *ret_buffer_len;
-
- uint16_t tmp16;
- size_t const header_size = 2 * sizeof(uint16_t);
-
- uint16_t pkg_length;
- size_t payload_size;
-
- if (output_len == 0)
- return EINVAL;
-
- if (buffer_len < header_size) {
- WARNING("network plugin: parse_part_string: "
- "Packet too short: "
- "Chunk of at least size %" PRIsz " expected, "
- "but buffer has only %" PRIsz " bytes left.",
- header_size, buffer_len);
- return -1;
- }
-
- memcpy((void *)&tmp16, buffer, sizeof(tmp16));
- buffer += sizeof(tmp16);
- /* pkg_type = ntohs (tmp16); */
-
- memcpy((void *)&tmp16, buffer, sizeof(tmp16));
- buffer += sizeof(tmp16);
- pkg_length = ntohs(tmp16);
- payload_size = ((size_t)pkg_length) - header_size;
-
- /* Check that packet fits in the input buffer */
- if (pkg_length > buffer_len) {
- WARNING("network plugin: parse_part_string: "
- "Packet too big: "
- "Chunk of size %" PRIu16 " received, "
- "but buffer has only %" PRIsz " bytes left.",
- pkg_length, buffer_len);
- return -1;
- }
-
- /* Check that pkg_length is in the valid range */
- if (pkg_length <= header_size) {
- WARNING("network plugin: parse_part_string: "
- "Packet too short: "
- "Header claims this packet is only %hu "
- "bytes long.",
- pkg_length);
- return -1;
- }
-
- /* Check that the package data fits into the output buffer.
- * The previous if-statement ensures that:
- * `pkg_length > header_size' */
- if (output_len < payload_size) {
- WARNING("network plugin: parse_part_string: "
- "Buffer too small: "
- "Output buffer holds %" PRIsz " bytes, "
- "which is too small to hold the received "
- "%" PRIsz " byte string.",
- output_len, payload_size);
- return -1;
- }
-
- /* All sanity checks successfull, let's copy the data over */
- memcpy((void *)output, (void *)buffer, payload_size);
- buffer += payload_size;
-
- /* For some very weird reason '\0' doesn't do the trick on SPARC in
- * this statement. */
- if (output[payload_size - 1] != 0) {
- WARNING("network plugin: parse_part_string: "
- "Received string does not end "
- "with a NULL-byte.");
- return -1;
- }
-
- *ret_buffer = buffer;
- *ret_buffer_len = buffer_len - pkg_length;
-
- return 0;
-} /* int parse_part_string */
-
-/* Forward declaration: parse_part_sign_sha256 and parse_part_encr_aes256 call
- * parse_packet and vice versa. */
-#define PP_SIGNED 0x01
-#define PP_ENCRYPTED 0x02
-static int parse_packet(sockent_t *se, void *buffer, size_t buffer_size,
- int flags, const char *username);
-
-#define BUFFER_READ(p, s) \
- do { \
- memcpy((p), buffer + buffer_offset, (s)); \
- buffer_offset += (s); \
- } while (0)
-
-#if HAVE_GCRYPT_H
-static int parse_part_sign_sha256(sockent_t *se, /* {{{ */
- void **ret_buffer, size_t *ret_buffer_len,
- int flags) {
- static c_complain_t complain_no_users = C_COMPLAIN_INIT_STATIC;
-
- char *buffer;
- size_t buffer_len;
- size_t buffer_offset;
-
- size_t username_len;
- char *secret;
-
- part_signature_sha256_t pss;
- uint16_t pss_head_length;
- char hash[sizeof(pss.hash)];
-
- gcry_md_hd_t hd;
- gcry_error_t err;
- unsigned char *hash_ptr;
-
- buffer = *ret_buffer;
- buffer_len = *ret_buffer_len;
- buffer_offset = 0;
-
- /* Check if the buffer has enough data for this structure. */
- if (buffer_len <= PART_SIGNATURE_SHA256_SIZE)
- return -ENOMEM;
-
- /* Read type and length header */
- BUFFER_READ(&pss.head.type, sizeof(pss.head.type));
- BUFFER_READ(&pss.head.length, sizeof(pss.head.length));
- pss_head_length = ntohs(pss.head.length);
-
- /* Check if the `pss_head_length' is within bounds. */
- if ((pss_head_length <= PART_SIGNATURE_SHA256_SIZE) ||
- (pss_head_length > buffer_len)) {
- ERROR("network plugin: HMAC-SHA-256 with invalid length received.");
- return -1;
- }
-
- if (se->data.server.userdb == NULL) {
- c_complain(
- LOG_NOTICE, &complain_no_users,
- "network plugin: Received signed network packet but can't verify it "
- "because no user DB has been configured. Will accept it.");
-
- *ret_buffer = buffer + pss_head_length;
- *ret_buffer_len -= pss_head_length;
-
- return 0;
- }
-
- /* Copy the hash. */
- BUFFER_READ(pss.hash, sizeof(pss.hash));
-
- /* Calculate username length (without null byte) and allocate memory */
- username_len = pss_head_length - PART_SIGNATURE_SHA256_SIZE;
- pss.username = malloc(username_len + 1);
- if (pss.username == NULL)
- return -ENOMEM;
-
- /* Read the username */
- BUFFER_READ(pss.username, username_len);
- pss.username[username_len] = 0;
-
- assert(buffer_offset == pss_head_length);
-
- /* Query the password */
- secret = fbh_get(se->data.server.userdb, pss.username);
- if (secret == NULL) {
- ERROR("network plugin: Unknown user: %s", pss.username);
- sfree(pss.username);
- return -ENOENT;
- }
-
- /* Create a hash device and check the HMAC */
- hd = NULL;
- err = gcry_md_open(&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
- if (err != 0) {
- ERROR("network plugin: Creating HMAC-SHA-256 object failed: %s",
- gcry_strerror(err));
- sfree(secret);
- sfree(pss.username);
- return -1;
- }
-
- err = gcry_md_setkey(hd, secret, strlen(secret));
- if (err != 0) {
- ERROR("network plugin: gcry_md_setkey failed: %s", gcry_strerror(err));
- gcry_md_close(hd);
- sfree(secret);
- sfree(pss.username);
- return -1;
- }
-
- gcry_md_write(hd, buffer + PART_SIGNATURE_SHA256_SIZE,
- buffer_len - PART_SIGNATURE_SHA256_SIZE);
- hash_ptr = gcry_md_read(hd, GCRY_MD_SHA256);
- if (hash_ptr == NULL) {
- ERROR("network plugin: gcry_md_read failed.");
- gcry_md_close(hd);
- sfree(secret);
- sfree(pss.username);
- return -1;
- }
- memcpy(hash, hash_ptr, sizeof(hash));
-
- /* Clean up */
- gcry_md_close(hd);
- hd = NULL;
-
- if (memcmp(pss.hash, hash, sizeof(pss.hash)) != 0) {
- WARNING("network plugin: Verifying HMAC-SHA-256 signature failed: "
- "Hash mismatch. Username: %s",
- pss.username);
- } else {
- parse_packet(se, buffer + buffer_offset, buffer_len - buffer_offset,
- flags | PP_SIGNED, pss.username);
- }
-
- sfree(secret);
- sfree(pss.username);
-
- *ret_buffer = buffer + buffer_len;
- *ret_buffer_len = 0;
-
- return 0;
-} /* }}} int parse_part_sign_sha256 */
-/* #endif HAVE_GCRYPT_H */
-
-#else /* if !HAVE_GCRYPT_H */
-static int parse_part_sign_sha256(sockent_t *se, /* {{{ */
- void **ret_buffer, size_t *ret_buffer_size,
- int flags) {
- static int warning_has_been_printed;
-
- char *buffer;
- size_t buffer_size;
- size_t buffer_offset;
- uint16_t part_len;
-
- part_signature_sha256_t pss;
-
- buffer = *ret_buffer;
- buffer_size = *ret_buffer_size;
- buffer_offset = 0;
-
- if (buffer_size <= PART_SIGNATURE_SHA256_SIZE)
- return -ENOMEM;
-
- BUFFER_READ(&pss.head.type, sizeof(pss.head.type));
- BUFFER_READ(&pss.head.length, sizeof(pss.head.length));
- part_len = ntohs(pss.head.length);
-
- if ((part_len <= PART_SIGNATURE_SHA256_SIZE) || (part_len > buffer_size))
- return -EINVAL;
-
- if (warning_has_been_printed == 0) {
- WARNING("network plugin: Received signed packet, but the network "
- "plugin was not linked with libgcrypt, so I cannot "
- "verify the signature. The packet will be accepted.");
- warning_has_been_printed = 1;
- }
-
- parse_packet(se, buffer + part_len, buffer_size - part_len, flags,
- /* username = */ NULL);
-
- *ret_buffer = buffer + buffer_size;
- *ret_buffer_size = 0;
-
- return 0;
-} /* }}} int parse_part_sign_sha256 */
-#endif /* !HAVE_GCRYPT_H */
-
-#if HAVE_GCRYPT_H
-static int parse_part_encr_aes256(sockent_t *se, /* {{{ */
- void **ret_buffer, size_t *ret_buffer_len,
- int flags) {
- char *buffer = *ret_buffer;
- size_t buffer_len = *ret_buffer_len;
- size_t payload_len;
- size_t part_size;
- size_t buffer_offset;
- uint16_t username_len;
- part_encryption_aes256_t pea;
- unsigned char hash[sizeof(pea.hash)] = {0};
-
- gcry_cipher_hd_t cypher;
- gcry_error_t err;
-
- /* Make sure at least the header if available. */
- if (buffer_len <= PART_ENCRYPTION_AES256_SIZE) {
- NOTICE("network plugin: parse_part_encr_aes256: "
- "Discarding short packet.");
- return -1;
- }
-
- buffer_offset = 0;
-
- /* Copy the unencrypted information into `pea'. */
- BUFFER_READ(&pea.head.type, sizeof(pea.head.type));
- BUFFER_READ(&pea.head.length, sizeof(pea.head.length));
-
- /* Check the `part size'. */
- part_size = ntohs(pea.head.length);
- if ((part_size <= PART_ENCRYPTION_AES256_SIZE) || (part_size > buffer_len)) {
- NOTICE("network plugin: parse_part_encr_aes256: "
- "Discarding part with invalid size.");
- return -1;
- }
-
- /* Read the username */
- BUFFER_READ(&username_len, sizeof(username_len));
- username_len = ntohs(username_len);
-
- if ((username_len == 0) ||
- (username_len > (part_size - (PART_ENCRYPTION_AES256_SIZE + 1)))) {
- NOTICE("network plugin: parse_part_encr_aes256: "
- "Discarding part with invalid username length.");
- return -1;
- }
-
- assert(username_len > 0);
- pea.username = malloc(username_len + 1);
- if (pea.username == NULL)
- return -ENOMEM;
- BUFFER_READ(pea.username, username_len);
- pea.username[username_len] = 0;
-
- /* Last but not least, the initialization vector */
- BUFFER_READ(pea.iv, sizeof(pea.iv));
-
- /* Make sure we are at the right position */
- assert(buffer_offset ==
- (username_len + PART_ENCRYPTION_AES256_SIZE - sizeof(pea.hash)));
-
- cypher = network_get_aes256_cypher(se, pea.iv, sizeof(pea.iv), pea.username);
- if (cypher == NULL) {
- ERROR("network plugin: Failed to get cypher. Username: %s", pea.username);
- sfree(pea.username);
- return -1;
- }
-
- payload_len = part_size - (PART_ENCRYPTION_AES256_SIZE + username_len);
- assert(payload_len > 0);
-
- /* Decrypt the packet in-place */
- err = gcry_cipher_decrypt(cypher, buffer + buffer_offset,
- part_size - buffer_offset,
- /* in = */ NULL, /* in len = */ 0);
- if (err != 0) {
- ERROR("network plugin: gcry_cipher_decrypt returned: %s. Username: %s",
- gcry_strerror(err), pea.username);
- sfree(pea.username);
- return -1;
- }
-
- /* Read the hash */
- BUFFER_READ(pea.hash, sizeof(pea.hash));
-
- /* Make sure we're at the right position - again */
- assert(buffer_offset == (username_len + PART_ENCRYPTION_AES256_SIZE));
- assert(buffer_offset == (part_size - payload_len));
-
- /* Check hash sum */
- gcry_md_hash_buffer(GCRY_MD_SHA1, hash, buffer + buffer_offset, payload_len);
- if (memcmp(hash, pea.hash, sizeof(hash)) != 0) {
- ERROR("network plugin: Checksum mismatch. Username: %s", pea.username);
- sfree(pea.username);
- return -1;
- }
-
- parse_packet(se, buffer + buffer_offset, payload_len, flags | PP_ENCRYPTED,
- pea.username);
-
- /* Update return values */
- *ret_buffer = buffer + part_size;
- *ret_buffer_len = buffer_len - part_size;
-
- sfree(pea.username);
-
- return 0;
-} /* }}} int parse_part_encr_aes256 */
-/* #endif HAVE_GCRYPT_H */
-
-#else /* if !HAVE_GCRYPT_H */
-static int parse_part_encr_aes256(sockent_t *se, /* {{{ */
- void **ret_buffer, size_t *ret_buffer_size,
- int flags) {
- static int warning_has_been_printed;
-
- char *buffer;
- size_t buffer_size;
- size_t buffer_offset;
-
- part_header_t ph;
- size_t ph_length;
-
- buffer = *ret_buffer;
- buffer_size = *ret_buffer_size;
- buffer_offset = 0;
-
- /* parse_packet assures this minimum size. */
- assert(buffer_size >= (sizeof(ph.type) + sizeof(ph.length)));
-
- BUFFER_READ(&ph.type, sizeof(ph.type));
- BUFFER_READ(&ph.length, sizeof(ph.length));
- ph_length = ntohs(ph.length);
-
- if ((ph_length <= PART_ENCRYPTION_AES256_SIZE) || (ph_length > buffer_size)) {
- ERROR("network plugin: AES-256 encrypted part "
- "with invalid length received.");
- return -1;
- }
-
- if (warning_has_been_printed == 0) {
- WARNING("network plugin: Received encrypted packet, but the network "
- "plugin was not linked with libgcrypt, so I cannot "
- "decrypt it. The part will be discarded.");
- warning_has_been_printed = 1;
- }
-
- *ret_buffer = (void *)(((char *)*ret_buffer) + ph_length);
- *ret_buffer_size -= ph_length;
-
- return 0;
-} /* }}} int parse_part_encr_aes256 */
-#endif /* !HAVE_GCRYPT_H */
-
-#undef BUFFER_READ
-
-static int parse_packet(sockent_t *se, /* {{{ */
- void *buffer, size_t buffer_size, int flags,
- const char *username) {
- int status;
-
- value_list_t vl = VALUE_LIST_INIT;
- notification_t n = {0};
-
-#if HAVE_GCRYPT_H
- int packet_was_signed = (flags & PP_SIGNED);
- int packet_was_encrypted = (flags & PP_ENCRYPTED);
- int printed_ignore_warning = 0;
-#endif /* HAVE_GCRYPT_H */
-
- memset(&vl, '\0', sizeof(vl));
- status = 0;
-
- while ((status == 0) && (0 < buffer_size) &&
- ((unsigned int)buffer_size > sizeof(part_header_t))) {
- uint16_t pkg_length;
- uint16_t pkg_type;
-
- memcpy((void *)&pkg_type, (void *)buffer, sizeof(pkg_type));
- memcpy((void *)&pkg_length, (void *)(((char *)buffer) + sizeof(pkg_type)),
- sizeof(pkg_length));
-
- pkg_length = ntohs(pkg_length);
- pkg_type = ntohs(pkg_type);
-
- if (pkg_length > buffer_size)
- break;
- /* Ensure that this loop terminates eventually */
- if (pkg_length < (2 * sizeof(uint16_t)))
- break;
-
- if (pkg_type == TYPE_ENCR_AES256) {
- status = parse_part_encr_aes256(se, &buffer, &buffer_size, flags);
- if (status != 0) {
- ERROR("network plugin: Decrypting AES256 "
- "part failed "
- "with status %i.",
- status);
- break;
- }
- }
-#if HAVE_GCRYPT_H
- else if ((se->data.server.security_level == SECURITY_LEVEL_ENCRYPT) &&
- (packet_was_encrypted == 0)) {
- if (printed_ignore_warning == 0) {
- INFO("network plugin: Unencrypted packet or "
- "part has been ignored.");
- printed_ignore_warning = 1;
- }
- buffer = ((char *)buffer) + pkg_length;
- buffer_size -= (size_t)pkg_length;
- continue;
- }
-#endif /* HAVE_GCRYPT_H */
- else if (pkg_type == TYPE_SIGN_SHA256) {
- status = parse_part_sign_sha256(se, &buffer, &buffer_size, flags);
- if (status != 0) {
- ERROR("network plugin: Verifying HMAC-SHA-256 "
- "signature failed "
- "with status %i.",
- status);
- break;
- }
- }
-#if HAVE_GCRYPT_H
- else if ((se->data.server.security_level == SECURITY_LEVEL_SIGN) &&
- (packet_was_encrypted == 0) && (packet_was_signed == 0)) {
- if (printed_ignore_warning == 0) {
- INFO("network plugin: Unsigned packet or "
- "part has been ignored.");
- printed_ignore_warning = 1;
- }
- buffer = ((char *)buffer) + pkg_length;
- buffer_size -= (size_t)pkg_length;
- continue;
- }
-#endif /* HAVE_GCRYPT_H */
- else if (pkg_type == TYPE_VALUES) {
- status =
- parse_part_values(&buffer, &buffer_size, &vl.values, &vl.values_len);
- if (status != 0)
- break;
-
- network_dispatch_values(&vl, username);
-
- sfree(vl.values);
- } else if (pkg_type == TYPE_TIME) {
- uint64_t tmp = 0;
- status = parse_part_number(&buffer, &buffer_size, &tmp);
- if (status == 0) {
- vl.time = TIME_T_TO_CDTIME_T(tmp);
- n.time = TIME_T_TO_CDTIME_T(tmp);
- }
- } else if (pkg_type == TYPE_TIME_HR) {
- uint64_t tmp = 0;
- status = parse_part_number(&buffer, &buffer_size, &tmp);
- if (status == 0) {
- vl.time = (cdtime_t)tmp;
- n.time = (cdtime_t)tmp;
- }
- } else if (pkg_type == TYPE_INTERVAL) {
- uint64_t tmp = 0;
- status = parse_part_number(&buffer, &buffer_size, &tmp);
- if (status == 0)
- vl.interval = TIME_T_TO_CDTIME_T(tmp);
- } else if (pkg_type == TYPE_INTERVAL_HR) {
- uint64_t tmp = 0;
- status = parse_part_number(&buffer, &buffer_size, &tmp);
- if (status == 0)
- vl.interval = (cdtime_t)tmp;
- } else if (pkg_type == TYPE_HOST) {
- status =
- parse_part_string(&buffer, &buffer_size, vl.host, sizeof(vl.host));
- if (status == 0)
- sstrncpy(n.host, vl.host, sizeof(n.host));
- } else if (pkg_type == TYPE_PLUGIN) {
- status = parse_part_string(&buffer, &buffer_size, vl.plugin,
- sizeof(vl.plugin));
- if (status == 0)
- sstrncpy(n.plugin, vl.plugin, sizeof(n.plugin));
- } else if (pkg_type == TYPE_PLUGIN_INSTANCE) {
- status = parse_part_string(&buffer, &buffer_size, vl.plugin_instance,
- sizeof(vl.plugin_instance));
- if (status == 0)
- sstrncpy(n.plugin_instance, vl.plugin_instance,
- sizeof(n.plugin_instance));
- } else if (pkg_type == TYPE_TYPE) {
- status =
- parse_part_string(&buffer, &buffer_size, vl.type, sizeof(vl.type));
- if (status == 0)
- sstrncpy(n.type, vl.type, sizeof(n.type));
- } else if (pkg_type == TYPE_TYPE_INSTANCE) {
- status = parse_part_string(&buffer, &buffer_size, vl.type_instance,
- sizeof(vl.type_instance));
- if (status == 0)
- sstrncpy(n.type_instance, vl.type_instance, sizeof(n.type_instance));
- } else if (pkg_type == TYPE_MESSAGE) {
- status = parse_part_string(&buffer, &buffer_size, n.message,
- sizeof(n.message));
-
- if (status != 0) {
- /* do nothing */
- } else if ((n.severity != NOTIF_FAILURE) &&
- (n.severity != NOTIF_WARNING) && (n.severity != NOTIF_OKAY)) {
- INFO("network plugin: "
- "Ignoring notification with "
- "unknown severity %i.",
- n.severity);
- } else if (n.time == 0) {
- INFO("network plugin: "
- "Ignoring notification with "
- "time == 0.");
- } else if (strlen(n.message) == 0) {
- INFO("network plugin: "
- "Ignoring notification with "
- "an empty message.");
- } else {
- network_dispatch_notification(&n);
- }
- } else if (pkg_type == TYPE_SEVERITY) {
- uint64_t tmp = 0;
- status = parse_part_number(&buffer, &buffer_size, &tmp);
- if (status == 0)
- n.severity = (int)tmp;
- } else {
- DEBUG("network plugin: parse_packet: Unknown part"
- " type: 0x%04hx",
- pkg_type);
- buffer = ((char *)buffer) + pkg_length;
- buffer_size -= (size_t)pkg_length;
- }
- } /* while (buffer_size > sizeof (part_header_t)) */
-
- if (status == 0 && buffer_size > 0)
- WARNING("network plugin: parse_packet: Received truncated "
- "packet, try increasing `MaxPacketSize'");
-
- return status;
-} /* }}} int parse_packet */
-
-static void free_sockent_client(struct sockent_client *sec) /* {{{ */
-{
- if (sec->fd >= 0) {
- close(sec->fd);
- sec->fd = -1;
- }
- sfree(sec->addr);
- sfree(sec->bind_addr);
-#if HAVE_GCRYPT_H
- sfree(sec->username);
- sfree(sec->password);
- if (sec->cypher != NULL)
- gcry_cipher_close(sec->cypher);
-#endif
-} /* }}} void free_sockent_client */
-
-static void free_sockent_server(struct sockent_server *ses) /* {{{ */
-{
- for (size_t i = 0; i < ses->fd_num; i++) {
- if (ses->fd[i] >= 0) {
- close(ses->fd[i]);
- ses->fd[i] = -1;
- }
- }
-
- sfree(ses->fd);
-#if HAVE_GCRYPT_H
- sfree(ses->auth_file);
- fbh_destroy(ses->userdb);
- if (ses->cypher != NULL)
- gcry_cipher_close(ses->cypher);
-#endif
-} /* }}} void free_sockent_server */
-
-static void sockent_destroy(sockent_t *se) /* {{{ */
-{
- sockent_t *next;
-
- DEBUG("network plugin: sockent_destroy (se = %p);", (void *)se);
-
- while (se != NULL) {
- next = se->next;
-
- sfree(se->node);
- sfree(se->service);
-
- if (se->type == SOCKENT_TYPE_CLIENT)
- free_sockent_client(&se->data.client);
- else
- free_sockent_server(&se->data.server);
-
- sfree(se);
- se = next;
- }
-} /* }}} void sockent_destroy */
-
-/*
- * int network_set_ttl
- *
- * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or
- * `IPV6_UNICAST_HOPS', depending on which option is applicable.
- *
- * The `struct addrinfo' is used to destinguish between unicast and multicast
- * sockets.
- */
-static int network_set_ttl(const sockent_t *se, const struct addrinfo *ai) {
- DEBUG("network plugin: network_set_ttl: network_config_ttl = %i;",
- network_config_ttl);
-
- assert(se->type == SOCKENT_TYPE_CLIENT);
-
- if ((network_config_ttl < 1) || (network_config_ttl > 255))
- return -1;
-
- if (ai->ai_family == AF_INET) {
- struct sockaddr_in *addr = (struct sockaddr_in *)ai->ai_addr;
- int optname;
-
- if (IN_MULTICAST(ntohl(addr->sin_addr.s_addr)))
- optname = IP_MULTICAST_TTL;
- else
- optname = IP_TTL;
-
- if (setsockopt(se->data.client.fd, IPPROTO_IP, optname, &network_config_ttl,
- sizeof(network_config_ttl)) != 0) {
- ERROR("network plugin: setsockopt (ipv4-ttl): %s", STRERRNO);
- return -1;
- }
- } else if (ai->ai_family == AF_INET6) {
- /* Useful example:
- * http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
- struct sockaddr_in6 *addr = (struct sockaddr_in6 *)ai->ai_addr;
- int optname;
-
- if (IN6_IS_ADDR_MULTICAST(&addr->sin6_addr))
- optname = IPV6_MULTICAST_HOPS;
- else
- optname = IPV6_UNICAST_HOPS;
-
- if (setsockopt(se->data.client.fd, IPPROTO_IPV6, optname,
- &network_config_ttl, sizeof(network_config_ttl)) != 0) {
- ERROR("network plugin: setsockopt(ipv6-ttl): %s", STRERRNO);
- return -1;
- }
- }
-
- return 0;
-} /* int network_set_ttl */
-
-static int network_set_interface(const sockent_t *se,
- const struct addrinfo *ai) /* {{{ */
-{
- DEBUG("network plugin: network_set_interface: interface index = %i;",
- se->interface);
-
- assert(se->type == SOCKENT_TYPE_CLIENT);
-
- if (ai->ai_family == AF_INET) {
- struct sockaddr_in *addr = (struct sockaddr_in *)ai->ai_addr;
-
- if (IN_MULTICAST(ntohl(addr->sin_addr.s_addr))) {
-#if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
- /* If possible, use the "ip_mreqn" structure which has
- * an "interface index" member. Using the interface
- * index is preferred here, because of its similarity
- * to the way IPv6 handles this. Unfortunately, it
- * appears not to be portable. */
- struct ip_mreqn mreq = {.imr_multiaddr.s_addr = addr->sin_addr.s_addr,
- .imr_address.s_addr = ntohl(INADDR_ANY),
- .imr_ifindex = se->interface};
-#else
- struct ip_mreq mreq = {.imr_multiaddr.s_addr = addr->sin_addr.s_addr,
- .imr_interface.s_addr = ntohl(INADDR_ANY)};
-#endif
-
- if (setsockopt(se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF, &mreq,
- sizeof(mreq)) != 0) {
- ERROR("network plugin: setsockopt (ipv4-multicast-if): %s", STRERRNO);
- return -1;
- }
-
- return 0;
- }
- } else if (ai->ai_family == AF_INET6) {
- struct sockaddr_in6 *addr = (struct sockaddr_in6 *)ai->ai_addr;
-
- if (IN6_IS_ADDR_MULTICAST(&addr->sin6_addr)) {
- if (setsockopt(se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
- &se->interface, sizeof(se->interface)) != 0) {
- ERROR("network plugin: setsockopt (ipv6-multicast-if): %s", STRERRNO);
- return -1;
- }
-
- return 0;
- }
- }
-
- /* else: Not a multicast interface. */
- if (se->interface != 0) {
-#if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && \
- defined(SO_BINDTODEVICE)
- char interface_name[IFNAMSIZ];
-
- if (if_indextoname(se->interface, interface_name) == NULL)
- return -1;
-
- DEBUG("network plugin: Binding socket to interface %s", interface_name);
-
- if (setsockopt(se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
- interface_name, sizeof(interface_name)) == -1) {
- ERROR("network plugin: setsockopt (bind-if): %s", STRERRNO);
- return -1;
- }
-/* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
-
-#else
- WARNING("network plugin: Cannot set the interface on a unicast "
- "socket because "
-#if !defined(SO_BINDTODEVICE)
- "the \"SO_BINDTODEVICE\" socket option "
-#else
- "the \"if_indextoname\" function "
-#endif
- "is not available on your system.");
-#endif
- }
-
- return 0;
-} /* }}} network_set_interface */
-
-static int network_bind_socket_to_addr(sockent_t *se,
- const struct addrinfo *ai) {
-
- if (se->data.client.bind_addr == NULL)
- return 0;
-
- DEBUG("fd %i: bind socket to address", se->data.client.fd);
- char pbuffer[64];
-
- if (ai->ai_family == AF_INET) {
- struct sockaddr_in *addr =
- (struct sockaddr_in *)(se->data.client.bind_addr);
- inet_ntop(AF_INET, &(addr->sin_addr), pbuffer, 64);
- DEBUG("binding client socket to ipv4 address: %s", pbuffer);
- if (bind(se->data.client.fd, (struct sockaddr *)addr, sizeof(*addr)) ==
- -1) {
- ERROR("network_plugin: failed to bind client socket (ipv4): %s",
- STRERRNO);
- return -1;
- }
- } else if (ai->ai_family == AF_INET6) {
- struct sockaddr_in6 *addr =
- (struct sockaddr_in6 *)(se->data.client.bind_addr);
- inet_ntop(AF_INET, &(addr->sin6_addr), pbuffer, 64);
- DEBUG("binding client socket to ipv6 address: %s", pbuffer);
- if (bind(se->data.client.fd, (struct sockaddr *)addr, sizeof(*addr)) ==
- -1) {
- ERROR("network_plugin: failed to bind client socket (ipv6): %s",
- STRERRNO);
- return -1;
- }
- }
-
- return 0;
-} /* int network_bind_socket_to_addr */
-
-static int network_bind_socket(int fd, const struct addrinfo *ai,
- const int interface_idx) {
-#if KERNEL_SOLARIS
- char loop = 0;
-#else
- int loop = 0;
-#endif
- int yes = 1;
-
- /* allow multiple sockets to use the same PORT number */
- if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) == -1) {
- ERROR("network plugin: setsockopt (reuseaddr): %s", STRERRNO);
- return -1;
- }
-
- DEBUG("fd = %i; calling `bind'", fd);
-
- if (bind(fd, ai->ai_addr, ai->ai_addrlen) == -1) {
- ERROR("bind: %s", STRERRNO);
- return -1;
- }
-
- if (ai->ai_family == AF_INET) {
- struct sockaddr_in *addr = (struct sockaddr_in *)ai->ai_addr;
- if (IN_MULTICAST(ntohl(addr->sin_addr.s_addr))) {
-#if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
- struct ip_mreqn mreq;
-#else
- struct ip_mreq mreq;
-#endif
-
- DEBUG("fd = %i; IPv4 multicast address found", fd);
-
- mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
-#if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
- /* Set the interface using the interface index if
- * possible (available). Unfortunately, the struct
- * ip_mreqn is not portable. */
- mreq.imr_address.s_addr = ntohl(INADDR_ANY);
- mreq.imr_ifindex = interface_idx;
-#else
- mreq.imr_interface.s_addr = ntohl(INADDR_ANY);
-#endif
-
- if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop)) ==
- -1) {
- ERROR("network plugin: setsockopt (multicast-loop): %s", STRERRNO);
- return -1;
- }
-
- if (setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) ==
- -1) {
- ERROR("network plugin: setsockopt (add-membership): %s", STRERRNO);
- return -1;
- }
-
- return 0;
- }
- } else if (ai->ai_family == AF_INET6) {
- /* Useful example:
- * http://gsyc.escet.urjc.es/~eva/IPv6-web/examples/mcast.html */
- struct sockaddr_in6 *addr = (struct sockaddr_in6 *)ai->ai_addr;
- if (IN6_IS_ADDR_MULTICAST(&addr->sin6_addr)) {
- struct ipv6_mreq mreq;
-
- DEBUG("fd = %i; IPv6 multicast address found", fd);
-
- memcpy(&mreq.ipv6mr_multiaddr, &addr->sin6_addr, sizeof(addr->sin6_addr));
-
- /* http://developer.apple.com/documentation/Darwin/Reference/ManPages/man4/ip6.4.html
- * ipv6mr_interface may be set to zeroes to
- * choose the default multicast interface or to
- * the index of a particular multicast-capable
- * interface if the host is multihomed.
- * Membership is associ-associated with a
- * single interface; programs running on
- * multihomed hosts may need to join the same
- * group on more than one interface.*/
- mreq.ipv6mr_interface = interface_idx;
-
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &loop,
- sizeof(loop)) == -1) {
- ERROR("network plugin: setsockopt (ipv6-multicast-loop): %s", STRERRNO);
- return -1;
- }
-
- if (setsockopt(fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq,
- sizeof(mreq)) == -1) {
- ERROR("network plugin: setsockopt (ipv6-add-membership): %s", STRERRNO);
- return -1;
- }
-
- return 0;
- }
- }
-
-#if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && \
- defined(SO_BINDTODEVICE)
- /* if a specific interface was set, bind the socket to it. But to avoid
- * possible problems with multicast routing, only do that for non-multicast
- * addresses */
- if (interface_idx != 0) {
- char interface_name[IFNAMSIZ];
-
- if (if_indextoname(interface_idx, interface_name) == NULL)
- return -1;
-
- DEBUG("fd = %i; Binding socket to interface %s", fd, interface_name);
-
- if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, interface_name,
- sizeof(interface_name)) == -1) {
- ERROR("network plugin: setsockopt (bind-if): %s", STRERRNO);
- return -1;
- }
- }
-#endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
-
- return 0;
-} /* int network_bind_socket */
-
-/* Initialize a sockent structure. `type' must be either `SOCKENT_TYPE_CLIENT'
- * or `SOCKENT_TYPE_SERVER' */
-static sockent_t *sockent_create(int type) /* {{{ */
-{
- sockent_t *se;
-
- if ((type != SOCKENT_TYPE_CLIENT) && (type != SOCKENT_TYPE_SERVER))
- return NULL;
-
- se = calloc(1, sizeof(*se));
- if (se == NULL)
- return NULL;
-
- se->type = type;
- se->node = NULL;
- se->service = NULL;
- se->interface = 0;
- se->next = NULL;
-
- if (type == SOCKENT_TYPE_SERVER) {
- se->data.server.fd = NULL;
- se->data.server.fd_num = 0;
-#if HAVE_GCRYPT_H
- se->data.server.security_level = SECURITY_LEVEL_NONE;
- se->data.server.auth_file = NULL;
- se->data.server.userdb = NULL;
- se->data.server.cypher = NULL;
-#endif
- } else {
- se->data.client.fd = -1;
- se->data.client.addr = NULL;
- se->data.client.bind_addr = NULL;
- se->data.client.resolve_interval = 0;
- se->data.client.next_resolve_reconnect = 0;
-#if HAVE_GCRYPT_H
- se->data.client.security_level = SECURITY_LEVEL_NONE;
- se->data.client.username = NULL;
- se->data.client.password = NULL;
- se->data.client.cypher = NULL;
-#endif
- }
-
- return se;
-} /* }}} sockent_t *sockent_create */
-
-static int sockent_init_crypto(sockent_t *se) /* {{{ */
-{
-#if HAVE_GCRYPT_H /* {{{ */
- if (se->type == SOCKENT_TYPE_CLIENT) {
- if (se->data.client.security_level > SECURITY_LEVEL_NONE) {
- if (network_init_gcrypt() < 0) {
- ERROR("network plugin: Cannot configure client socket with "
- "security: Failed to initialize crypto library.");
- return -1;
- }
-
- if ((se->data.client.username == NULL) ||
- (se->data.client.password == NULL)) {
- ERROR("network plugin: Client socket with "
- "security requested, but no "
- "credentials are configured.");
- return -1;
- }
- gcry_md_hash_buffer(GCRY_MD_SHA256, se->data.client.password_hash,
- se->data.client.password,
- strlen(se->data.client.password));
- }
- } else /* (se->type == SOCKENT_TYPE_SERVER) */
- {
- if ((se->data.server.security_level > SECURITY_LEVEL_NONE) &&
- (se->data.server.auth_file == NULL)) {
- ERROR("network plugin: Server socket with security requested, "
- "but no \"AuthFile\" is configured.");
- return -1;
- }
- if (se->data.server.auth_file != NULL) {
- if (network_init_gcrypt() < 0) {
- ERROR("network plugin: Cannot configure server socket with security: "
- "Failed to initialize crypto library.");
- return -1;
- }
-
- se->data.server.userdb = fbh_create(se->data.server.auth_file);
- if (se->data.server.userdb == NULL) {
- ERROR("network plugin: Reading password file \"%s\" failed.",
- se->data.server.auth_file);
- return -1;
- }
- }
- }
-#endif /* }}} HAVE_GCRYPT_H */
-
- return 0;
-} /* }}} int sockent_init_crypto */
-
-static int sockent_client_disconnect(sockent_t *se) /* {{{ */
-{
- struct sockent_client *client;
-
- if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
- return EINVAL;
-
- client = &se->data.client;
- if (client->fd >= 0) /* connected */
- {
- close(client->fd);
- client->fd = -1;
- }
-
- sfree(client->addr);
- client->addrlen = 0;
-
- return 0;
-} /* }}} int sockent_client_disconnect */
-
-static int sockent_client_connect(sockent_t *se) /* {{{ */
-{
- static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
-
- struct sockent_client *client;
- struct addrinfo *ai_list;
- int status;
- bool reconnect = false;
- cdtime_t now;
-
- if ((se == NULL) || (se->type != SOCKENT_TYPE_CLIENT))
- return EINVAL;
-
- client = &se->data.client;
-
- now = cdtime();
- if (client->resolve_interval != 0 && client->next_resolve_reconnect < now) {
- DEBUG("network plugin: Reconnecting socket, resolve_interval = %lf, "
- "next_resolve_reconnect = %lf",
- CDTIME_T_TO_DOUBLE(client->resolve_interval),
- CDTIME_T_TO_DOUBLE(client->next_resolve_reconnect));
- reconnect = true;
- }
-
- if (client->fd >= 0 && !reconnect) /* already connected and not stale*/
- return 0;
-
- struct addrinfo ai_hints = {.ai_family = AF_UNSPEC,
- .ai_flags = AI_ADDRCONFIG,
- .ai_protocol = IPPROTO_UDP,
- .ai_socktype = SOCK_DGRAM};
-
- status = getaddrinfo(se->node,
- (se->service != NULL) ? se->service : NET_DEFAULT_PORT,
- &ai_hints, &ai_list);
- if (status != 0) {
- c_complain(
- LOG_ERR, &complaint, "network plugin: getaddrinfo (%s, %s) failed: %s",
- (se->node == NULL) ? "(null)" : se->node,
- (se->service == NULL) ? "(null)" : se->service, gai_strerror(status));
- return -1;
- } else {
- c_release(LOG_NOTICE, &complaint,
- "network plugin: Successfully resolved \"%s\".", se->node);
- }
-
- for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL;
- ai_ptr = ai_ptr->ai_next) {
- if (client->fd >= 0) /* when we reconnect */
- sockent_client_disconnect(se);
-
- client->fd =
- socket(ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
- if (client->fd < 0) {
- ERROR("network plugin: socket(2) failed: %s", STRERRNO);
- continue;
- }
-
- client->addr = calloc(1, sizeof(*client->addr));
- if (client->addr == NULL) {
- ERROR("network plugin: calloc failed.");
- close(client->fd);
- client->fd = -1;
- continue;
- }
-
- assert(sizeof(*client->addr) >= ai_ptr->ai_addrlen);
- memcpy(client->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
- client->addrlen = ai_ptr->ai_addrlen;
-
- network_set_ttl(se, ai_ptr);
- network_set_interface(se, ai_ptr);
- network_bind_socket_to_addr(se, ai_ptr);
-
- /* We don't open more than one write-socket per
- * node/service pair.. */
- break;
- }
-
- freeaddrinfo(ai_list);
- if (client->fd < 0)
- return -1;
-
- if (client->resolve_interval > 0)
- client->next_resolve_reconnect = now + client->resolve_interval;
- return 0;
-} /* }}} int sockent_client_connect */
-
-/* Open the file descriptors for a initialized sockent structure. */
-static int sockent_server_listen(sockent_t *se) /* {{{ */
-{
- struct addrinfo *ai_list;
- int status;
-
- const char *node;
- const char *service;
-
- if (se == NULL)
- return -1;
-
- assert(se->data.server.fd == NULL);
- assert(se->data.server.fd_num == 0);
-
- node = se->node;
- service = se->service;
-
- if (service == NULL)
- service = NET_DEFAULT_PORT;
-
- DEBUG("network plugin: sockent_server_listen: node = %s; service = %s;", node,
- service);
-
- struct addrinfo ai_hints = {.ai_family = AF_UNSPEC,
- .ai_flags = AI_ADDRCONFIG | AI_PASSIVE,
- .ai_protocol = IPPROTO_UDP,
- .ai_socktype = SOCK_DGRAM};
-
- status = getaddrinfo(node, service, &ai_hints, &ai_list);
- if (status != 0) {
- ERROR("network plugin: getaddrinfo (%s, %s) failed: %s",
- (se->node == NULL) ? "(null)" : se->node,
- (se->service == NULL) ? "(null)" : se->service, gai_strerror(status));
- return -1;
- }
-
- for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL;
- ai_ptr = ai_ptr->ai_next) {
- int *tmp;
-
- tmp = realloc(se->data.server.fd,
- sizeof(*tmp) * (se->data.server.fd_num + 1));
- if (tmp == NULL) {
- ERROR("network plugin: realloc failed.");
- continue;
- }
- se->data.server.fd = tmp;
- tmp = se->data.server.fd + se->data.server.fd_num;
-
- *tmp = socket(ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
- if (*tmp < 0) {
- ERROR("network plugin: socket(2) failed: %s", STRERRNO);
- continue;
- }
-
- status = network_bind_socket(*tmp, ai_ptr, se->interface);
- if (status != 0) {
- close(*tmp);
- *tmp = -1;
- continue;
- }
-
- se->data.server.fd_num++;
- continue;
- } /* for (ai_list) */
-
- freeaddrinfo(ai_list);
-
- if (se->data.server.fd_num == 0)
- return -1;
- return 0;
-} /* }}} int sockent_server_listen */
-
-/* Add a sockent to the global list of sockets */
-static int sockent_add(sockent_t *se) /* {{{ */
-{
- sockent_t *last_ptr;
-
- if (se == NULL)
- return -1;
-
- if (se->type == SOCKENT_TYPE_SERVER) {
- struct pollfd *tmp;
-
- tmp = realloc(listen_sockets_pollfd,
- sizeof(*tmp) * (listen_sockets_num + se->data.server.fd_num));
- if (tmp == NULL) {
- ERROR("network plugin: realloc failed.");
- return -1;
- }
- listen_sockets_pollfd = tmp;
- tmp = listen_sockets_pollfd + listen_sockets_num;
-
- for (size_t i = 0; i < se->data.server.fd_num; i++) {
- memset(tmp + i, 0, sizeof(*tmp));
- tmp[i].fd = se->data.server.fd[i];
- tmp[i].events = POLLIN | POLLPRI;
- tmp[i].revents = 0;
- }
-
- listen_sockets_num += se->data.server.fd_num;
-
- if (listen_sockets == NULL) {
- listen_sockets = se;
- return 0;
- }
- last_ptr = listen_sockets;
- } else /* if (se->type == SOCKENT_TYPE_CLIENT) */
- {
- if (sending_sockets == NULL) {
- sending_sockets = se;
- return 0;
- }
- last_ptr = sending_sockets;
- }
-
- while (last_ptr->next != NULL)
- last_ptr = last_ptr->next;
- last_ptr->next = se;
-
- return 0;
-} /* }}} int sockent_add */
-
-static void *dispatch_thread(void __attribute__((unused)) * arg) /* {{{ */
-{
- while (42) {
- receive_list_entry_t *ent;
- sockent_t *se;
-
- /* Lock and wait for more data to come in */
- pthread_mutex_lock(&receive_list_lock);
- while ((listen_loop == 0) && (receive_list_head == NULL))
- pthread_cond_wait(&receive_list_cond, &receive_list_lock);
-
- /* Remove the head entry and unlock */
- ent = receive_list_head;
- if (ent != NULL)
- receive_list_head = ent->next;
- receive_list_length--;
- pthread_mutex_unlock(&receive_list_lock);
-
- /* Check whether we are supposed to exit. We do NOT check `listen_loop'
- * because we dispatch all missing packets before shutting down. */
- if (ent == NULL)
- break;
-
- /* Look for the correct `sockent_t' */
- se = listen_sockets;
- while (se != NULL) {
- size_t i;
-
- for (i = 0; i < se->data.server.fd_num; i++)
- if (se->data.server.fd[i] == ent->fd)
- break;
-
- if (i < se->data.server.fd_num)
- break;
-
- se = se->next;
- }
-
- if (se == NULL) {
- ERROR("network plugin: Got packet from FD %i, but can't "
- "find an appropriate socket entry.",
- ent->fd);
- sfree(ent->data);
- sfree(ent);
- continue;
- }
-
- parse_packet(se, ent->data, ent->data_len, /* flags = */ 0,
- /* username = */ NULL);
- sfree(ent->data);
- sfree(ent);
- } /* while (42) */
-
- return NULL;
-} /* }}} void *dispatch_thread */
-
-static int network_receive(void) /* {{{ */
-{
- char buffer[network_config_packet_size];
- int buffer_len;
-
- int status = 0;
-
- receive_list_entry_t *private_list_head;
- receive_list_entry_t *private_list_tail;
- uint64_t private_list_length;
-
- assert(listen_sockets_num > 0);
-
- private_list_head = NULL;
- private_list_tail = NULL;
- private_list_length = 0;
-
- while (listen_loop == 0) {
- status = poll(listen_sockets_pollfd, listen_sockets_num, -1);
- if (status <= 0) {
- if (errno == EINTR)
- continue;
- ERROR("network plugin: poll(2) failed: %s", STRERRNO);
- break;
- }
-
- for (size_t i = 0; (i < listen_sockets_num) && (status > 0); i++) {
- receive_list_entry_t *ent;
-
- if ((listen_sockets_pollfd[i].revents & (POLLIN | POLLPRI)) == 0)
- continue;
- status--;
-
- buffer_len = recv(listen_sockets_pollfd[i].fd, buffer, sizeof(buffer),
- 0 /* no flags */);
- if (buffer_len < 0) {
- status = (errno != 0) ? errno : -1;
- ERROR("network plugin: recv(2) failed: %s", STRERRNO);
- break;
- }
-
- stats_octets_rx += ((uint64_t)buffer_len);
- stats_packets_rx++;
-
- /* TODO: Possible performance enhancement: Do not free
- * these entries in the dispatch thread but put them in
- * another list, so we don't have to allocate more and
- * more of these structures. */
- ent = calloc(1, sizeof(*ent));
- if (ent == NULL) {
- ERROR("network plugin: calloc failed.");
- status = ENOMEM;
- break;
- }
-
- ent->data = malloc(network_config_packet_size);
- if (ent->data == NULL) {
- sfree(ent);
- ERROR("network plugin: malloc failed.");
- status = ENOMEM;
- break;
- }
- ent->fd = listen_sockets_pollfd[i].fd;
- ent->next = NULL;
-
- memcpy(ent->data, buffer, buffer_len);
- ent->data_len = buffer_len;
-
- if (private_list_head == NULL)
- private_list_head = ent;
- else
- private_list_tail->next = ent;
- private_list_tail = ent;
- private_list_length++;
-
- /* Do not block here. Blocking here has led to
- * insufficient performance in the past. */
- if (pthread_mutex_trylock(&receive_list_lock) == 0) {
- assert(((receive_list_head == NULL) && (receive_list_length == 0)) ||
- ((receive_list_head != NULL) && (receive_list_length != 0)));
-
- if (receive_list_head == NULL)
- receive_list_head = private_list_head;
- else
- receive_list_tail->next = private_list_head;
- receive_list_tail = private_list_tail;
- receive_list_length += private_list_length;
-
- pthread_cond_signal(&receive_list_cond);
- pthread_mutex_unlock(&receive_list_lock);
-
- private_list_head = NULL;
- private_list_tail = NULL;
- private_list_length = 0;
- }
-
- status = 0;
- } /* for (listen_sockets_pollfd) */
-
- if (status != 0)
- break;
- } /* while (listen_loop == 0) */
-
- /* Make sure everything is dispatched before exiting. */
- if (private_list_head != NULL) {
- pthread_mutex_lock(&receive_list_lock);
-
- if (receive_list_head == NULL)
- receive_list_head = private_list_head;
- else
- receive_list_tail->next = private_list_head;
- receive_list_tail = private_list_tail;
- receive_list_length += private_list_length;
-
- pthread_cond_signal(&receive_list_cond);
- pthread_mutex_unlock(&receive_list_lock);
- }
-
- return status;
-} /* }}} int network_receive */
-
-static void *receive_thread(void __attribute__((unused)) * arg) {
- return network_receive() ? (void *)1 : (void *)0;
-} /* void *receive_thread */
-
-static void network_init_buffer(void) {
- memset(send_buffer, 0, network_config_packet_size);
- send_buffer_ptr = send_buffer;
- send_buffer_fill = 0;
- send_buffer_last_update = 0;
-
- memset(&send_buffer_vl, 0, sizeof(send_buffer_vl));
-} /* int network_init_buffer */
-
-static void network_send_buffer_plain(sockent_t *se, /* {{{ */
- const char *buffer, size_t buffer_size) {
- int status;
-
- while (42) {
- status = sockent_client_connect(se);
- if (status != 0)
- return;
-
- status = sendto(se->data.client.fd, buffer, buffer_size,
- /* flags = */ 0, (struct sockaddr *)se->data.client.addr,
- se->data.client.addrlen);
- if (status < 0) {
- if ((errno == EINTR) || (errno == EAGAIN))
- continue;
-
- ERROR("network plugin: sendto failed: %s. Closing sending socket.",
- STRERRNO);
- sockent_client_disconnect(se);
- return;
- }
-
- break;
- } /* while (42) */
-} /* }}} void network_send_buffer_plain */
-
-#if HAVE_GCRYPT_H
-#define BUFFER_ADD(p, s) \
- do { \
- memcpy(buffer + buffer_offset, (p), (s)); \
- buffer_offset += (s); \
- } while (0)
-
-static void network_send_buffer_signed(sockent_t *se, /* {{{ */
- const char *in_buffer,
- size_t in_buffer_size) {
- char buffer[BUFF_SIG_SIZE + in_buffer_size];
- size_t buffer_offset;
- size_t username_len;
-
- gcry_md_hd_t hd;
- gcry_error_t err;
- unsigned char *hash;
-
- hd = NULL;
- err = gcry_md_open(&hd, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
- if (err != 0) {
- ERROR("network plugin: Creating HMAC object failed: %s",
- gcry_strerror(err));
- return;
- }
-
- err = gcry_md_setkey(hd, se->data.client.password,
- strlen(se->data.client.password));
- if (err != 0) {
- ERROR("network plugin: gcry_md_setkey failed: %s", gcry_strerror(err));
- gcry_md_close(hd);
- return;
- }
-
- username_len = strlen(se->data.client.username);
- if (username_len > (BUFF_SIG_SIZE - PART_SIGNATURE_SHA256_SIZE)) {
- ERROR("network plugin: Username too long: %s", se->data.client.username);
- return;
- }
-
- memcpy(buffer + PART_SIGNATURE_SHA256_SIZE, se->data.client.username,
- username_len);
- memcpy(buffer + PART_SIGNATURE_SHA256_SIZE + username_len, in_buffer,
- in_buffer_size);
-
- /* Initialize the `ps' structure. */
- part_signature_sha256_t ps = {
- .head.type = htons(TYPE_SIGN_SHA256),
- .head.length = htons(PART_SIGNATURE_SHA256_SIZE + username_len)};
-
- /* Calculate the hash value. */
- gcry_md_write(hd, buffer + PART_SIGNATURE_SHA256_SIZE,
- username_len + in_buffer_size);
- hash = gcry_md_read(hd, GCRY_MD_SHA256);
- if (hash == NULL) {
- ERROR("network plugin: gcry_md_read failed.");
- gcry_md_close(hd);
- return;
- }
- memcpy(ps.hash, hash, sizeof(ps.hash));
-
- /* Add the header */
- buffer_offset = 0;
-
- BUFFER_ADD(&ps.head.type, sizeof(ps.head.type));
- BUFFER_ADD(&ps.head.length, sizeof(ps.head.length));
- BUFFER_ADD(ps.hash, sizeof(ps.hash));
-
- assert(buffer_offset == PART_SIGNATURE_SHA256_SIZE);
-
- gcry_md_close(hd);
- hd = NULL;
-
- buffer_offset = PART_SIGNATURE_SHA256_SIZE + username_len + in_buffer_size;
- network_send_buffer_plain(se, buffer, buffer_offset);
-} /* }}} void network_send_buffer_signed */
-
-static void network_send_buffer_encrypted(sockent_t *se, /* {{{ */
- const char *in_buffer,
- size_t in_buffer_size) {
- char buffer[BUFF_SIG_SIZE + in_buffer_size];
- size_t buffer_size;
- size_t buffer_offset;
- size_t header_size;
- size_t username_len;
- gcry_error_t err;
- gcry_cipher_hd_t cypher;
-
- /* Initialize the header fields */
- part_encryption_aes256_t pea = {.head.type = htons(TYPE_ENCR_AES256),
- .username = se->data.client.username};
-
- username_len = strlen(pea.username);
- if ((PART_ENCRYPTION_AES256_SIZE + username_len) > BUFF_SIG_SIZE) {
- ERROR("network plugin: Username too long: %s", pea.username);
- return;
- }
-
- buffer_size = PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size;
- header_size = PART_ENCRYPTION_AES256_SIZE + username_len - sizeof(pea.hash);
-
- assert(buffer_size <= sizeof(buffer));
- DEBUG("network plugin: network_send_buffer_encrypted: "
- "buffer_size = %" PRIsz ";",
- buffer_size);
-
- pea.head.length = htons(
- (uint16_t)(PART_ENCRYPTION_AES256_SIZE + username_len + in_buffer_size));
- pea.username_length = htons((uint16_t)username_len);
-
- /* Chose a random initialization vector. */
- gcry_randomize((void *)&pea.iv, sizeof(pea.iv), GCRY_STRONG_RANDOM);
-
- /* Create hash of the payload */
- gcry_md_hash_buffer(GCRY_MD_SHA1, pea.hash, in_buffer, in_buffer_size);
-
- /* Initialize the buffer */
- buffer_offset = 0;
- memset(buffer, 0, sizeof(buffer));
-
- BUFFER_ADD(&pea.head.type, sizeof(pea.head.type));
- BUFFER_ADD(&pea.head.length, sizeof(pea.head.length));
- BUFFER_ADD(&pea.username_length, sizeof(pea.username_length));
- BUFFER_ADD(pea.username, username_len);
- BUFFER_ADD(pea.iv, sizeof(pea.iv));
- assert(buffer_offset == header_size);
- BUFFER_ADD(pea.hash, sizeof(pea.hash));
- BUFFER_ADD(in_buffer, in_buffer_size);
-
- assert(buffer_offset == buffer_size);
-
- cypher = network_get_aes256_cypher(se, pea.iv, sizeof(pea.iv),
- se->data.client.password);
- if (cypher == NULL)
- return;
-
- /* Encrypt the buffer in-place */
- err = gcry_cipher_encrypt(cypher, buffer + header_size,
- buffer_size - header_size,
- /* in = */ NULL, /* in len = */ 0);
- if (err != 0) {
- ERROR("network plugin: gcry_cipher_encrypt returned: %s",
- gcry_strerror(err));
- return;
- }
-
- /* Send it out without further modifications */
- network_send_buffer_plain(se, buffer, buffer_size);
-} /* }}} void network_send_buffer_encrypted */
-#undef BUFFER_ADD
-#endif /* HAVE_GCRYPT_H */
-
-static void network_send_buffer(char *buffer, size_t buffer_len) /* {{{ */
-{
- DEBUG("network plugin: network_send_buffer: buffer_len = %" PRIsz,
- buffer_len);
-
- for (sockent_t *se = sending_sockets; se != NULL; se = se->next) {
-#if HAVE_GCRYPT_H
- if (se->data.client.security_level == SECURITY_LEVEL_ENCRYPT)
- network_send_buffer_encrypted(se, buffer, buffer_len);
- else if (se->data.client.security_level == SECURITY_LEVEL_SIGN)
- network_send_buffer_signed(se, buffer, buffer_len);
- else /* if (se->data.client.security_level == SECURITY_LEVEL_NONE) */
-#endif /* HAVE_GCRYPT_H */
- network_send_buffer_plain(se, buffer, buffer_len);
- } /* for (sending_sockets) */
-} /* }}} void network_send_buffer */
-
-static int add_to_buffer(char *buffer, size_t buffer_size, /* {{{ */
- value_list_t *vl_def, const data_set_t *ds,
- const value_list_t *vl) {
- char *buffer_orig = buffer;
-
- if (strcmp(vl_def->host, vl->host) != 0) {
- if (write_part_string(&buffer, &buffer_size, TYPE_HOST, vl->host,
- strlen(vl->host)) != 0)
- return -1;
- sstrncpy(vl_def->host, vl->host, sizeof(vl_def->host));
- }
-
- if (vl_def->time != vl->time) {
- if (write_part_number(&buffer, &buffer_size, TYPE_TIME_HR,
- (uint64_t)vl->time))
- return -1;
- vl_def->time = vl->time;
- }
-
- if (vl_def->interval != vl->interval) {
- if (write_part_number(&buffer, &buffer_size, TYPE_INTERVAL_HR,
- (uint64_t)vl->interval))
- return -1;
- vl_def->interval = vl->interval;
- }
-
- if (strcmp(vl_def->plugin, vl->plugin) != 0) {
- if (write_part_string(&buffer, &buffer_size, TYPE_PLUGIN, vl->plugin,
- strlen(vl->plugin)) != 0)
- return -1;
- sstrncpy(vl_def->plugin, vl->plugin, sizeof(vl_def->plugin));
- }
-
- if (strcmp(vl_def->plugin_instance, vl->plugin_instance) != 0) {
- if (write_part_string(&buffer, &buffer_size, TYPE_PLUGIN_INSTANCE,
- vl->plugin_instance,
- strlen(vl->plugin_instance)) != 0)
- return -1;
- sstrncpy(vl_def->plugin_instance, vl->plugin_instance,
- sizeof(vl_def->plugin_instance));
- }
-
- if (strcmp(vl_def->type, vl->type) != 0) {
- if (write_part_string(&buffer, &buffer_size, TYPE_TYPE, vl->type,
- strlen(vl->type)) != 0)
- return -1;
- sstrncpy(vl_def->type, ds->type, sizeof(vl_def->type));
- }
-
- if (strcmp(vl_def->type_instance, vl->type_instance) != 0) {
- if (write_part_string(&buffer, &buffer_size, TYPE_TYPE_INSTANCE,
- vl->type_instance, strlen(vl->type_instance)) != 0)
- return -1;
- sstrncpy(vl_def->type_instance, vl->type_instance,
- sizeof(vl_def->type_instance));
- }
-
- if (write_part_values(&buffer, &buffer_size, ds, vl) != 0)
- return -1;
-
- return buffer - buffer_orig;
-} /* }}} int add_to_buffer */
-
-static void flush_buffer(void) {
- DEBUG("network plugin: flush_buffer: send_buffer_fill = %i",
- send_buffer_fill);
-
- network_send_buffer(send_buffer, (size_t)send_buffer_fill);
-
- stats_octets_tx += ((uint64_t)send_buffer_fill);
- stats_packets_tx++;
-
- network_init_buffer();
-}
-
-static int network_write(const data_set_t *ds, const value_list_t *vl,
- user_data_t __attribute__((unused)) * user_data) {
- int status;
-
- /* listen_loop is set to non-zero in the shutdown callback, which is
- * guaranteed to be called *after* all the write threads have been shut
- * down. */
- assert(listen_loop == 0);
-
- if (!check_send_okay(vl)) {
-#if COLLECT_DEBUG
- char name[6 * DATA_MAX_NAME_LEN];
- FORMAT_VL(name, sizeof(name), vl);
- name[sizeof(name) - 1] = 0;
- DEBUG("network plugin: network_write: "
- "NOT sending %s.",
- name);
-#endif
- /* Counter is not protected by another lock and may be reached by
- * multiple threads */
- pthread_mutex_lock(&stats_lock);
- stats_values_not_sent++;
- pthread_mutex_unlock(&stats_lock);
- return 0;
- }
-
- uc_meta_data_add_unsigned_int(vl, "network:time_sent", (uint64_t)vl->time);
-
- pthread_mutex_lock(&send_buffer_lock);
-
- status = add_to_buffer(send_buffer_ptr,
- network_config_packet_size -
- (send_buffer_fill + BUFF_SIG_SIZE),
- &send_buffer_vl, ds, vl);
- if (status >= 0) {
- /* status == bytes added to the buffer */
- send_buffer_fill += status;
- send_buffer_ptr += status;
- send_buffer_last_update = cdtime();
-
- stats_values_sent++;
- } else {
- flush_buffer();
-
- status = add_to_buffer(send_buffer_ptr,
- network_config_packet_size -
- (send_buffer_fill + BUFF_SIG_SIZE),
- &send_buffer_vl, ds, vl);
-
- if (status >= 0) {
- send_buffer_fill += status;
- send_buffer_ptr += status;
-
- stats_values_sent++;
- }
- }
-
- if (status < 0) {
- ERROR("network plugin: Unable to append to the "
- "buffer for some weird reason");
- } else if ((network_config_packet_size - send_buffer_fill) < 15) {
- flush_buffer();
- }
-
- pthread_mutex_unlock(&send_buffer_lock);
-
- return (status < 0) ? -1 : 0;
-} /* int network_write */
-
-static int network_config_set_ttl(const oconfig_item_t *ci) /* {{{ */
-{
- int tmp = 0;
-
- if (cf_util_get_int(ci, &tmp) != 0)
- return -1;
- else if ((tmp > 0) && (tmp <= 255))
- network_config_ttl = tmp;
- else {
- WARNING("network plugin: The `TimeToLive' must be between 1 and 255.");
- return -1;
- }
-
- return 0;
-} /* }}} int network_config_set_ttl */
-
-static int network_config_set_interface(const oconfig_item_t *ci, /* {{{ */
- int *interface) {
- char if_name[256];
-
- if (cf_util_get_string_buffer(ci, if_name, sizeof(if_name)) != 0)
- return -1;
-
- *interface = if_nametoindex(if_name);
- return 0;
-} /* }}} int network_config_set_interface */
-
-static int
-network_config_set_bind_address(const oconfig_item_t *ci,
- struct sockaddr_storage **bind_address) {
- if ((*bind_address) != NULL) {
- ERROR("network_plugin: only a single bind address is allowed");
- return 1;
- }
-
- char addr_text[256];
-
- if (cf_util_get_string_buffer(ci, addr_text, sizeof(addr_text)) != 0)
- return -1;
-
- int ret;
- struct addrinfo hint, *res = NULL;
-
- memset(&hint, '\0', sizeof hint);
- hint.ai_family = PF_UNSPEC;
- hint.ai_flags = AI_NUMERICHOST;
-
- ret = getaddrinfo(addr_text, NULL, &hint, &res);
- if (ret) {
- ERROR("Bind address option has invalid address set: %s", gai_strerror(ret));
- return 1;
- }
-
- *bind_address = malloc(sizeof(**bind_address));
- (*bind_address)->ss_family = res->ai_family;
- if (res->ai_family == AF_INET) {
- struct sockaddr_in *addr = (struct sockaddr_in *)(*bind_address);
- inet_pton(AF_INET, addr_text, &(addr->sin_addr));
- } else if (res->ai_family == AF_INET6) {
- struct sockaddr_in6 *addr = (struct sockaddr_in6 *)(*bind_address);
- inet_pton(AF_INET6, addr_text, &(addr->sin6_addr));
- } else {
- ERROR("%s is an unknown address format %d\n", addr_text, res->ai_family);
- }
-
- return 0;
-} /* int network_config_set_bind_address */
-
-static int network_config_set_buffer_size(const oconfig_item_t *ci) /* {{{ */
-{
- int tmp = 0;
-
- if (cf_util_get_int(ci, &tmp) != 0)
- return -1;
- else if ((tmp >= 1024) && (tmp <= 65535))
- network_config_packet_size = tmp;
- else {
- WARNING(
- "network plugin: The `MaxPacketSize' must be between 1024 and 65535.");
- return -1;
- }
-
- return 0;
-} /* }}} int network_config_set_buffer_size */
-
-#if HAVE_GCRYPT_H
-static int network_config_set_security_level(oconfig_item_t *ci, /* {{{ */
- int *retval) {
- char *str;
- if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
- WARNING("network plugin: The `SecurityLevel' config option needs exactly "
- "one string argument.");
- return -1;
- }
-
- str = ci->values[0].value.string;
- if (strcasecmp("Encrypt", str) == 0)
- *retval = SECURITY_LEVEL_ENCRYPT;
- else if (strcasecmp("Sign", str) == 0)
- *retval = SECURITY_LEVEL_SIGN;
- else if (strcasecmp("None", str) == 0)
- *retval = SECURITY_LEVEL_NONE;
- else {
- WARNING("network plugin: Unknown security level: %s.", str);
- return -1;
- }
-
- return 0;
-} /* }}} int network_config_set_security_level */
-#endif /* HAVE_GCRYPT_H */
-
-static int network_config_add_listen(const oconfig_item_t *ci) /* {{{ */
-{
- sockent_t *se;
- int status;
-
- if ((ci->values_num < 1) || (ci->values_num > 2) ||
- (ci->values[0].type != OCONFIG_TYPE_STRING) ||
- ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING))) {
- ERROR("network plugin: The `%s' config option needs "
- "one or two string arguments.",
- ci->key);
- return -1;
- }
-
- se = sockent_create(SOCKENT_TYPE_SERVER);
- if (se == NULL) {
- ERROR("network plugin: sockent_create failed.");
- return -1;
- }
-
- se->node = strdup(ci->values[0].value.string);
- if (ci->values_num >= 2)
- se->service = strdup(ci->values[1].value.string);
-
- for (int i = 0; i < ci->children_num; i++) {
- oconfig_item_t *child = ci->children + i;
-
-#if HAVE_GCRYPT_H
- if (strcasecmp("AuthFile", child->key) == 0)
- cf_util_get_string(child, &se->data.server.auth_file);
- else if (strcasecmp("SecurityLevel", child->key) == 0)
- network_config_set_security_level(child, &se->data.server.security_level);
- else
-#endif /* HAVE_GCRYPT_H */
- if (strcasecmp("Interface", child->key) == 0)
- network_config_set_interface(child, &se->interface);
- else {
- WARNING("network plugin: Option `%s' is not allowed here.", child->key);
- }
- }
-
-#if HAVE_GCRYPT_H
- if ((se->data.server.security_level > SECURITY_LEVEL_NONE) &&
- (se->data.server.auth_file == NULL)) {
- ERROR("network plugin: A security level higher than `none' was "
- "requested, but no AuthFile option was given. Cowardly refusing to "
- "open this socket!");
- sockent_destroy(se);
- return -1;
- }
-#endif /* HAVE_GCRYPT_H */
-
- status = sockent_init_crypto(se);
- if (status != 0) {
- ERROR("network plugin: network_config_add_listen: sockent_init_crypto() "
- "failed.");
- sockent_destroy(se);
- return -1;
- }
-
- status = sockent_server_listen(se);
- if (status != 0) {
- ERROR("network plugin: network_config_add_listen: sockent_server_listen "
- "failed.");
- sockent_destroy(se);
- return -1;
- }
-
- status = sockent_add(se);
- if (status != 0) {
- ERROR("network plugin: network_config_add_listen: sockent_add failed.");
- sockent_destroy(se);
- return -1;
- }
-
- return 0;
-} /* }}} int network_config_add_listen */
-
-static int network_config_add_server(const oconfig_item_t *ci) /* {{{ */
-{
- sockent_t *se;
- int status;
-
- if ((ci->values_num < 1) || (ci->values_num > 2) ||
- (ci->values[0].type != OCONFIG_TYPE_STRING) ||
- ((ci->values_num > 1) && (ci->values[1].type != OCONFIG_TYPE_STRING))) {
- ERROR("network plugin: The `%s' config option needs "
- "one or two string arguments.",
- ci->key);
- return -1;
- }
-
- se = sockent_create(SOCKENT_TYPE_CLIENT);
- if (se == NULL) {
- ERROR("network plugin: sockent_create failed.");
- return -1;
- }
-
- se->node = strdup(ci->values[0].value.string);
- if (ci->values_num >= 2)
- se->service = strdup(ci->values[1].value.string);
-
- for (int i = 0; i < ci->children_num; i++) {
- oconfig_item_t *child = ci->children + i;
-
-#if HAVE_GCRYPT_H
- if (strcasecmp("Username", child->key) == 0)
- cf_util_get_string(child, &se->data.client.username);
- else if (strcasecmp("Password", child->key) == 0)
- cf_util_get_string(child, &se->data.client.password);
- else if (strcasecmp("SecurityLevel", child->key) == 0)
- network_config_set_security_level(child, &se->data.client.security_level);
- else
-#endif /* HAVE_GCRYPT_H */
- if (strcasecmp("Interface", child->key) == 0)
- network_config_set_interface(child, &se->interface);
- else if (strcasecmp("BindAddress", child->key) == 0)
- network_config_set_bind_address(child, &se->data.client.bind_addr);
- else if (strcasecmp("ResolveInterval", child->key) == 0)
- cf_util_get_cdtime(child, &se->data.client.resolve_interval);
- else {
- WARNING("network plugin: Option `%s' is not allowed here.", child->key);
- }
- }
-
-#if HAVE_GCRYPT_H
- if ((se->data.client.security_level > SECURITY_LEVEL_NONE) &&
- ((se->data.client.username == NULL) ||
- (se->data.client.password == NULL))) {
- ERROR("network plugin: A security level higher than `none' was "
- "requested, but no Username or Password option was given. "
- "Cowardly refusing to open this socket!");
- sockent_destroy(se);
- return -1;
- }
-#endif /* HAVE_GCRYPT_H */
-
- status = sockent_init_crypto(se);
- if (status != 0) {
- ERROR("network plugin: network_config_add_server: sockent_init_crypto() "
- "failed.");
- sockent_destroy(se);
- return -1;
- }
-
- /* No call to sockent_client_connect() here -- it is called from
- * network_send_buffer_plain(). */
-
- status = sockent_add(se);
- if (status != 0) {
- ERROR("network plugin: network_config_add_server: sockent_add failed.");
- sockent_destroy(se);
- return -1;
- }
-
- return 0;
-} /* }}} int network_config_add_server */
-
-static int network_config(oconfig_item_t *ci) /* {{{ */
-{
- /* The options need to be applied first */
- for (int i = 0; i < ci->children_num; i++) {
- oconfig_item_t *child = ci->children + i;
- if (strcasecmp("TimeToLive", child->key) == 0)
- network_config_set_ttl(child);
- }
-
- for (int i = 0; i < ci->children_num; i++) {
- oconfig_item_t *child = ci->children + i;
-
- if (strcasecmp("Listen", child->key) == 0)
- network_config_add_listen(child);
- else if (strcasecmp("Server", child->key) == 0)
- network_config_add_server(child);
- else if (strcasecmp("TimeToLive", child->key) == 0) {
- /* Handled earlier */
- } else if (strcasecmp("MaxPacketSize", child->key) == 0)
- network_config_set_buffer_size(child);
- else if (strcasecmp("Forward", child->key) == 0)
- cf_util_get_boolean(child, &network_config_forward);
- else if (strcasecmp("ReportStats", child->key) == 0)
- cf_util_get_boolean(child, &network_config_stats);
- else {
- WARNING("network plugin: Option `%s' is not allowed here.", child->key);
- }
- }
-
- return 0;
-} /* }}} int network_config */
-
-static int network_notification(const notification_t *n,
- user_data_t __attribute__((unused)) *
- user_data) {
- char buffer[network_config_packet_size];
- char *buffer_ptr = buffer;
- size_t buffer_free = sizeof(buffer);
- int status;
-
- if (!check_send_notify_okay(n))
- return 0;
-
- memset(buffer, 0, sizeof(buffer));
-
- status = write_part_number(&buffer_ptr, &buffer_free, TYPE_TIME_HR,
- (uint64_t)n->time);
- if (status != 0)
- return -1;
-
- status = write_part_number(&buffer_ptr, &buffer_free, TYPE_SEVERITY,
- (uint64_t)n->severity);
- if (status != 0)
- return -1;
-
- if (strlen(n->host) > 0) {
- status = write_part_string(&buffer_ptr, &buffer_free, TYPE_HOST, n->host,
- strlen(n->host));
- if (status != 0)
- return -1;
- }
-
- if (strlen(n->plugin) > 0) {
- status = write_part_string(&buffer_ptr, &buffer_free, TYPE_PLUGIN,
- n->plugin, strlen(n->plugin));
- if (status != 0)
- return -1;
- }
-
- if (strlen(n->plugin_instance) > 0) {
- status = write_part_string(&buffer_ptr, &buffer_free, TYPE_PLUGIN_INSTANCE,
- n->plugin_instance, strlen(n->plugin_instance));
- if (status != 0)
- return -1;
- }
-
- if (strlen(n->type) > 0) {
- status = write_part_string(&buffer_ptr, &buffer_free, TYPE_TYPE, n->type,
- strlen(n->type));
- if (status != 0)
- return -1;
- }
-
- if (strlen(n->type_instance) > 0) {
- status = write_part_string(&buffer_ptr, &buffer_free, TYPE_TYPE_INSTANCE,
- n->type_instance, strlen(n->type_instance));
- if (status != 0)
- return -1;
- }
-
- status = write_part_string(&buffer_ptr, &buffer_free, TYPE_MESSAGE,
- n->message, strlen(n->message));
- if (status != 0)
- return -1;
-
- network_send_buffer(buffer, sizeof(buffer) - buffer_free);
-
- return 0;
-} /* int network_notification */
-
-static int network_shutdown(void) {
- listen_loop++;
-
- /* Kill the listening thread */
- if (receive_thread_running != 0) {
- INFO("network plugin: Stopping receive thread.");
- pthread_kill(receive_thread_id, SIGTERM);
- pthread_join(receive_thread_id, NULL /* no return value */);
- memset(&receive_thread_id, 0, sizeof(receive_thread_id));
- receive_thread_running = 0;
- }
-
- /* Shutdown the dispatching thread */
- if (dispatch_thread_running != 0) {
- INFO("network plugin: Stopping dispatch thread.");
- pthread_mutex_lock(&receive_list_lock);
- pthread_cond_broadcast(&receive_list_cond);
- pthread_mutex_unlock(&receive_list_lock);
- pthread_join(dispatch_thread_id, /* ret = */ NULL);
- dispatch_thread_running = 0;
- }
-
- sockent_destroy(listen_sockets);
-
- if (send_buffer_fill > 0)
- flush_buffer();
-
- sfree(send_buffer);
-
- for (sockent_t *se = sending_sockets; se != NULL; se = se->next)
- sockent_client_disconnect(se);
- sockent_destroy(sending_sockets);
-
- plugin_unregister_config("network");
- plugin_unregister_init("network");
- plugin_unregister_write("network");
- plugin_unregister_shutdown("network");
-
- return 0;
-} /* int network_shutdown */
-
-static int network_stats_read(void) /* {{{ */
-{
- derive_t copy_octets_rx;
- derive_t copy_octets_tx;
- derive_t copy_packets_rx;
- derive_t copy_packets_tx;
- derive_t copy_values_dispatched;
- derive_t copy_values_not_dispatched;
- derive_t copy_values_sent;
- derive_t copy_values_not_sent;
- derive_t copy_receive_list_length;
- value_list_t vl = VALUE_LIST_INIT;
- value_t values[2];
-
- copy_octets_rx = stats_octets_rx;
- copy_octets_tx = stats_octets_tx;
- copy_packets_rx = stats_packets_rx;
- copy_packets_tx = stats_packets_tx;
- copy_values_dispatched = stats_values_dispatched;
- copy_values_not_dispatched = stats_values_not_dispatched;
- copy_values_sent = stats_values_sent;
- copy_values_not_sent = stats_values_not_sent;
- copy_receive_list_length = receive_list_length;
-
- /* Initialize `vl' */
- vl.values = values;
- vl.values_len = 2;
- vl.time = 0;
- sstrncpy(vl.plugin, "network", sizeof(vl.plugin));
-
- /* Octets received / sent */
- vl.values[0].derive = (derive_t)copy_octets_rx;
- vl.values[1].derive = (derive_t)copy_octets_tx;
- sstrncpy(vl.type, "if_octets", sizeof(vl.type));
- plugin_dispatch_values(&vl);
-
- /* Packets received / send */
- vl.values[0].derive = (derive_t)copy_packets_rx;
- vl.values[1].derive = (derive_t)copy_packets_tx;
- sstrncpy(vl.type, "if_packets", sizeof(vl.type));
- plugin_dispatch_values(&vl);
-
- /* Values (not) dispatched and (not) send */
- sstrncpy(vl.type, "total_values", sizeof(vl.type));
- vl.values_len = 1;
-
- vl.values[0].derive = (derive_t)copy_values_dispatched;
- sstrncpy(vl.type_instance, "dispatch-accepted", sizeof(vl.type_instance));
- plugin_dispatch_values(&vl);
-
- vl.values[0].derive = (derive_t)copy_values_not_dispatched;
- sstrncpy(vl.type_instance, "dispatch-rejected", sizeof(vl.type_instance));
- plugin_dispatch_values(&vl);
-
- vl.values[0].derive = (derive_t)copy_values_sent;
- sstrncpy(vl.type_instance, "send-accepted", sizeof(vl.type_instance));
- plugin_dispatch_values(&vl);
-
- vl.values[0].derive = (derive_t)copy_values_not_sent;
- sstrncpy(vl.type_instance, "send-rejected", sizeof(vl.type_instance));
- plugin_dispatch_values(&vl);
-
- /* Receive queue length */
- vl.values[0].gauge = (gauge_t)copy_receive_list_length;
- sstrncpy(vl.type, "queue_length", sizeof(vl.type));
- vl.type_instance[0] = 0;
- plugin_dispatch_values(&vl);
-
- return 0;
-} /* }}} int network_stats_read */
-
-static int network_init(void) {
- static bool have_init;
-
- /* Check if we were already initialized. If so, just return - there's
- * nothing more to do (for now, that is). */
- if (have_init)
- return 0;
- have_init = true;
-
- if (network_config_stats)
- plugin_register_read("network", network_stats_read);
-
- plugin_register_shutdown("network", network_shutdown);
-
- send_buffer = malloc(network_config_packet_size);
- if (send_buffer == NULL) {
- ERROR("network plugin: malloc failed.");
- return -1;
- }
- network_init_buffer();
-
- /* setup socket(s) and so on */
- if (sending_sockets != NULL) {
- plugin_register_write("network", network_write,
- /* user_data = */ NULL);
- plugin_register_notification("network", network_notification,
- /* user_data = */ NULL);
- }
-
- /* If no threads need to be started, return here. */
- if ((listen_sockets_num == 0) ||
- ((dispatch_thread_running != 0) && (receive_thread_running != 0)))
- return 0;
-
- if (dispatch_thread_running == 0) {
- int status;
- status = plugin_thread_create(&dispatch_thread_id, NULL /* no attributes */,
- dispatch_thread, NULL /* no argument */,
- "network disp");
- if (status != 0) {
- ERROR("network: pthread_create failed: %s", STRERRNO);
- } else {
- dispatch_thread_running = 1;
- }
- }
-
- if (receive_thread_running == 0) {
- int status;
- status = plugin_thread_create(&receive_thread_id, NULL /* no attributes */,
- receive_thread, NULL /* no argument */,
- "network recv");
- if (status != 0) {
- ERROR("network: pthread_create failed: %s", STRERRNO);
- } else {
- receive_thread_running = 1;
- }
- }
-
- return 0;
-} /* int network_init */
-
-/*
- * The flush option of the network plugin cannot flush individual identifiers.
- * All the values are added to a buffer and sent when the buffer is full, the
- * requested value may or may not be in there, it's not worth finding out. We
- * just send the buffer if `flush' is called - if the requested value was in
- * there, good. If not, well, then there is nothing to flush.. -octo
- */
-static int network_flush(cdtime_t timeout,
- __attribute__((unused)) const char *identifier,
- __attribute__((unused)) user_data_t *user_data) {
- pthread_mutex_lock(&send_buffer_lock);
-
- if (send_buffer_fill > 0) {
- if (timeout > 0) {
- cdtime_t now = cdtime();
- if ((send_buffer_last_update + timeout) > now) {
- pthread_mutex_unlock(&send_buffer_lock);
- return 0;
- }
- }
- flush_buffer();
- }
- pthread_mutex_unlock(&send_buffer_lock);
-
- return 0;
-} /* int network_flush */
-
-void module_register(void) {
- plugin_register_complex_config("network", network_config);
- plugin_register_init("network", network_init);
- plugin_register_flush("network", network_flush,
- /* user_data = */ NULL);
-} /* void module_register */
projects / collectd.git / commitdiff