From: elieyal Date: Wed, 20 Jun 2018 06:21:34 +0000 (+0300) Subject: Fixed additional comments X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=5551ab1aaca14851e9b1d2fa93bf60418e23f85d;p=collectd.git Fixed additional comments Added "network plugin" prefix to Errors return -1; added to sfree --- diff --git a/src/network.c b/src/network.c index e3d52786..d4c1eacf 100644 --- a/src/network.c +++ b/src/network.c @@ -1,3274 +1,129 @@ -/** - * 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 - * Aman Gupta - **/ - -#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 -#endif -#if HAVE_NETINET_IN_H -#include -#endif -#if HAVE_ARPA_INET_H -#include -#endif -#if HAVE_POLL_H -#include -#endif -#if HAVE_NET_IF_H -#include -#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 -#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]; - /* */ - unsigned char hash[20]; - /* */ - /* */ -}; -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 */ +diff -Naur src/network.c src/network.c +--- src/network.c 2018-06-14 06:29:51.000000000 +0300 ++++ src/network.c 2018-06-19 21:27:22.432241000 +0300 +@@ -113,6 +113,7 @@ + #endif + cdtime_t next_resolve_reconnect; + cdtime_t resolve_interval; ++ struct sockaddr_storage *bind_addr; + }; + + struct sockent_server { +@@ -1501,6 +1502,7 @@ + sec->fd = -1; + } + sfree(sec->addr); ++ sfree(sec->bind_addr); + #if HAVE_GCRYPT_H + sfree(sec->username); + sfree(sec->password); +@@ -1683,6 +1685,35 @@ + 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("network_plugin: 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("network_plugin: 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("network_plugin: 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 +@@ -1834,6 +1865,7 @@ + } 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 +@@ -1989,6 +2021,7 @@ + + 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.. */ +@@ -2684,6 +2717,48 @@ + 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("network plugin: 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("network plugin: %s is an unknown address format %d\n",addr_text,res->ai_family); ++ sfree(*bind_address); ++ return -1; ++ } ++ ++ return 0; ++} /* int network_config_set_bind_address */ ++ + static int network_config_set_buffer_size(const oconfig_item_t *ci) /* {{{ */ + { + int tmp = 0; +@@ -2843,6 +2918,8 @@ + #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 {