src/plugins/store/network.c

   1 /*
   2  * SysDB - src/plugins/backend/store/network.c
   3  * Copyright (C) 2015 Sebastian 'tokkee' Harl <sh@tokkee.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  17  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  18  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
  19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #if HAVE_CONFIG_H
  29 #       include "config.h"
  30 #endif
  31
  32 #include "sysdb.h"
  33 #include "core/plugin.h"
  34 #include "client/sock.h"
  35 #include "utils/error.h"
  36 #include "utils/proto.h"
  37 #include "utils/os.h"
  38 #include "utils/ssl.h"
  39
  40 #include "liboconfig/utils.h"
  41
  42 #include <errno.h>
  43
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <strings.h>
  47
  48 SDB_PLUGIN_MAGIC;
  49
  50 /*
  51  * private data types
  52  */
  53
  54 typedef struct {
  55         sdb_client_t *client;
  56         char *addr;
  57         char *username;
  58         sdb_ssl_options_t ssl_opts;
  59 } user_data_t;
  60 #define UD(obj) SDB_OBJ_WRAPPER(obj)->data
  61
  62 static void
  63 user_data_destroy(void *obj)
  64 {
  65         user_data_t *ud = obj;
  66
  67         if (! ud)
  68                 return;
  69
  70         if (ud->client)
  71                 sdb_client_destroy(ud->client);
  72         ud->client = NULL;
  73         if (ud->addr)
  74                 free(ud->addr);
  75         ud->addr = NULL;
  76         if (ud->username)
  77                 free(ud->username);
  78         ud->username = NULL;
  79
  80         sdb_ssl_free_options(&ud->ssl_opts);
  81
  82         free(ud);
  83 } /* user_data_destroy */
  84
  85 /*
  86  * store writer implementation
  87  */
  88
  89 static int
  90 store_rpc(user_data_t *ud, const char *msg, size_t msg_len)
  91 {
  92         sdb_strbuf_t *buf = sdb_strbuf_create(128);
  93         uint32_t rstatus = 0;
  94         ssize_t status;
  95
  96         if (sdb_client_eof(ud->client)) {
  97                 sdb_client_close(ud->client);
  98                 if (sdb_client_connect(ud->client, ud->username)) {
  99                         sdb_log(SDB_LOG_ERR, "store::network: Failed to reconnect "
 100                                         "to SysDB at %s as user %s", ud->addr, ud->username);
 101                         return -1;
 102                 }
 103                 sdb_log(SDB_LOG_INFO, "store::network: Successfully reconnected "
 104                                 "to SysDB at %s as user %s", ud->addr, ud->username);
 105         }
 106
 107         status = sdb_client_rpc(ud->client, SDB_CONNECTION_STORE,
 108                         (uint32_t)msg_len, msg, &rstatus, buf);
 109         if (status < 0)
 110                 sdb_log(SDB_LOG_ERR, "store::network: %s", sdb_strbuf_string(buf));
 111         else if (rstatus != SDB_CONNECTION_OK) {
 112                 sdb_log(SDB_LOG_ERR, "store::network: Failed to send object: %s",
 113                                 sdb_strbuf_string(buf));
 114                 status = -1;
 115         }
 116
 117         sdb_strbuf_destroy(buf);
 118         if (status < 0)
 119                 return -1;
 120         return 0;
 121 } /* store_rpc */
 122
 123 static int
 124 store_host(sdb_store_host_t *host, sdb_object_t *user_data)
 125 {
 126         sdb_proto_host_t h = { host->last_update, host->name };
 127         size_t len = sdb_proto_marshal_host(NULL, 0, &h);
 128         char buf[len];
 129
 130         sdb_proto_marshal_host(buf, len, &h);
 131         return store_rpc(UD(user_data), buf, len);
 132 } /* store_host */
 133
 134 static int
 135 store_service(sdb_store_service_t *service, sdb_object_t *user_data)
 136 {
 137         sdb_proto_service_t s = {
 138                 service->last_update, service->hostname, service->name,
 139         };
 140         ssize_t len = sdb_proto_marshal_service(NULL, 0, &s);
 141         char buf[len];
 142
 143         sdb_proto_marshal_service(buf, len, &s);
 144         return store_rpc(UD(user_data), buf, len);
 145 } /* store_service */
 146
 147 static int
 148 store_metric(sdb_store_metric_t *metric, sdb_object_t *user_data)
 149 {
 150         sdb_proto_metric_t m = {
 151                 metric->last_update, metric->hostname, metric->name,
 152                 metric->store.type, metric->store.id,
 153         };
 154         size_t len = sdb_proto_marshal_metric(NULL, 0, &m);
 155         char buf[len];
 156
 157         sdb_proto_marshal_metric(buf, len, &m);
 158         return store_rpc(UD(user_data), buf, len);
 159 } /* store_metric */
 160
 161 static int
 162 store_attr(sdb_store_attribute_t *attr, sdb_object_t *user_data)
 163 {
 164         sdb_proto_attribute_t a = {
 165                 attr->last_update, attr->parent_type, attr->hostname, attr->parent,
 166                 attr->key, attr->value,
 167         };
 168         size_t len = sdb_proto_marshal_attribute(NULL, 0, &a);
 169         char buf[len];
 170
 171         sdb_proto_marshal_attribute(buf, len, &a);
 172         return store_rpc(UD(user_data), buf, len);
 173 } /* store_attr */
 174
 175 static sdb_store_writer_t store_impl = {
 176         store_host, store_service, store_metric, store_attr,
 177 };
 178
 179 /*
 180  * plugin API
 181  */
 182
 183 static int
 184 store_init(sdb_object_t *user_data)
 185 {
 186         user_data_t *ud;
 187
 188         if (! user_data)
 189                 return -1;
 190
 191         ud = SDB_OBJ_WRAPPER(user_data)->data;
 192         if (sdb_client_connect(ud->client, ud->username)) {
 193                 sdb_log(SDB_LOG_ERR, "store::network: Failed to connect "
 194                                 "to SysDB at %s as user %s", ud->addr, ud->username);
 195                 return -1;
 196         }
 197
 198         sdb_log(SDB_LOG_INFO, "store::network: Successfully connected "
 199                         "to SysDB at %s as user %s", ud->addr, ud->username);
 200         return 0;
 201 } /* store_init */
 202
 203 static int
 204 store_config_server(oconfig_item_t *ci)
 205 {
 206         sdb_object_t *user_data;
 207         user_data_t *ud;
 208         int ret = 0;
 209         int i;
 210
 211         ud = calloc(1, sizeof(*ud));
 212         if (! ud) {
 213                 char errbuf[1024];
 214                 sdb_log(SDB_LOG_ERR, "store::network: Failed to allocate "
 215                                 "a user-data object: %s",
 216                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 217                 return -1;
 218         }
 219
 220         if (oconfig_get_string(ci, &ud->addr)) {
 221                 sdb_log(SDB_LOG_ERR, "store::network: Server requires "
 222                                 "a single string argument\n\tUsage: <Server ADDRESS>");
 223                 user_data_destroy(ud);
 224                 return -1;
 225         }
 226         ud->addr = strdup(ud->addr);
 227         if (! ud->addr) {
 228                 sdb_log(SDB_LOG_ERR, "store::network: Failed to duplicate "
 229                                 "a string");
 230                 user_data_destroy(ud);
 231                 return -1;
 232         }
 233
 234         ud->client = sdb_client_create(ud->addr);
 235         if (! ud->client) {
 236                 char errbuf[1024];
 237                 sdb_log(SDB_LOG_ERR, "store::network: Failed to create client "
 238                                 "connecting to '%s': %s", ud->addr,
 239                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 240                 user_data_destroy(ud);
 241                 return -1;
 242         }
 243
 244         for (i = 0; i < ci->children_num; ++i) {
 245                 oconfig_item_t *child = ci->children + i;
 246                 char *tmp = NULL;
 247
 248                 if (! strcasecmp(child->key, "Username")) {
 249                         if (oconfig_get_string(child, &tmp)) {
 250                                 ret = -1;
 251                                 break;
 252                         }
 253                         ud->username = strdup(tmp);
 254                 }
 255                 else if (! strcasecmp(child->key, "SSLCertificate")) {
 256                         if (oconfig_get_string(child, &tmp)) {
 257                                 ret = -1;
 258                                 break;
 259                         }
 260                         ud->ssl_opts.cert_file = strdup(tmp);
 261                 }
 262                 else if (! strcasecmp(child->key, "SSLCertificateKey")) {
 263                         if (oconfig_get_string(child, &tmp)) {
 264                                 ret = -1;
 265                                 break;
 266                         }
 267                         ud->ssl_opts.key_file = strdup(tmp);
 268                 }
 269                 else if (! strcasecmp(child->key, "SSLCACertificates")) {
 270                         if (oconfig_get_string(child, &tmp)) {
 271                                 ret = -1;
 272                                 break;
 273                         }
 274                         ud->ssl_opts.ca_file = strdup(tmp);
 275                 }
 276                 else
 277                         sdb_log(SDB_LOG_WARNING, "store::network: Ignoring "
 278                                         "unknown config option '%s' inside <Server %s>.",
 279                                         child->key, ud->addr);
 280         }
 281
 282         if (ret) {
 283                 user_data_destroy(ud);
 284                 return ret;
 285         }
 286         if (! ud->username)
 287                 ud->username = sdb_get_current_user();
 288
 289         if (sdb_client_set_ssl_options(ud->client, &ud->ssl_opts)) {
 290                 sdb_log(SDB_LOG_ERR, "store::network: Failed to apply SSL options");
 291                 user_data_destroy(ud);
 292                 return -1;
 293         }
 294
 295         user_data = sdb_object_create_wrapper("store-network-userdata", ud,
 296                         user_data_destroy);
 297         if (! user_data) {
 298                 char errbuf[1024];
 299                 sdb_log(SDB_LOG_ERR, "store::network: Failed to allocate "
 300                                 "a user-data wrapper object: %s",
 301                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 302                 user_data_destroy(ud);
 303                 return -1;
 304         }
 305
 306         sdb_plugin_register_init(ud->addr, store_init, user_data);
 307         sdb_plugin_register_writer(ud->addr, &store_impl, user_data);
 308         sdb_object_deref(user_data);
 309         return 0;
 310 } /* store_config_server */
 311
 312 static int
 313 store_config(oconfig_item_t *ci)
 314 {
 315         int i;
 316
 317         if (! ci) /* nothing to do to deconfigure this plugin */
 318                 return 0;
 319
 320         for (i = 0; i < ci->children_num; ++i) {
 321                 oconfig_item_t *child = ci->children + i;
 322
 323                 if (! strcasecmp(child->key, "Server"))
 324                         store_config_server(child);
 325                 else
 326                         sdb_log(SDB_LOG_WARNING, "store::network: Ignoring "
 327                                         "unknown config option '%s'.", child->key);
 328         }
 329         return 0;
 330 } /* store_config */
 331
 332 int
 333 sdb_module_init(sdb_plugin_info_t *info)
 334 {
 335         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_DESC,
 336                         "send stored objects to a remote SysDB instance");
 337         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_COPYRIGHT,
 338                         "Copyright (C) 2015 Sebastian 'tokkee' Harl <sh@tokkee.org>");
 339         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_LICENSE, "BSD");
 340         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_VERSION, SDB_VERSION);
 341         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_PLUGIN_VERSION, SDB_VERSION);
 342
 343         sdb_plugin_register_config(store_config);
 344         return 0;
 345 } /* sdb_module_init */
 346
 347 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 348