ircd/bandbi.c

   1 /* src/bandbi.c
   2  * An interface to the ban db.
   3  *
   4  * Copyright (C) 2006 Lee Hardy <lee -at- leeh.co.uk>
   5  * Copyright (C) 2006 ircd-ratbox development team
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are
   9  * met:
  10  *
  11  * 1.Redistributions of source code must retain the above copyright notice,
  12  *   this list of conditions and the following disclaimer.
  13  * 2.Redistributions in binary form must reproduce the above copyright
  14  *   notice, this list of conditions and the following disclaimer in the
  15  *   documentation and/or other materials provided with the distribution.
  16  * 3.The name of the author may not be used to endorse or promote products
  17  *   derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  23  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  25  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  27  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  28  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 #include "stdinc.h"
  32 #include "rb_lib.h"
  33 #include "client.h"
  34 #include "s_conf.h"
  35 #include "logger.h"
  36 #include "match.h"
  37 #include "bandbi.h"
  38 #include "parse.h"
  39 #include "channel.h"
  40 #include "hostmask.h"
  41 #include "hash.h"
  42 #include "s_newconf.h"
  43 #include "reject.h"
  44 #include "send.h"
  45 #include "ircd.h"
  46 #include "msg.h"        /* XXX: MAXPARA */
  47 #include "operhash.h"
  48
  49 static void
  50 bandb_handle_failure(rb_helper *helper, char **parv, int parc) __attribute__((noreturn));
  51
  52 static char bandb_add_letter[LAST_BANDB_TYPE] = {
  53         'K', 'D', 'X', 'R'
  54 };
  55
  56 rb_dlink_list bandb_pending;
  57
  58 static rb_helper *bandb_helper;
  59 static int start_bandb(void);
  60
  61 static void bandb_parse(rb_helper *);
  62 static void bandb_restart_cb(rb_helper *);
  63 static char *bandb_path;
  64
  65 void
  66 init_bandb(void)
  67 {
  68         if(start_bandb())
  69         {
  70                 ilog(L_MAIN, "Unable to start bandb helper: %s", strerror(errno));
  71                 exit(0);
  72         }
  73 }
  74
  75
  76 static int
  77 start_bandb(void)
  78 {
  79         char fullpath[PATH_MAX + 1];
  80
  81         rb_setenv("BANDB_DBPATH", ircd_paths[IRCD_PATH_BANDB], 1);
  82         if(bandb_path == NULL)
  83         {
  84                 snprintf(fullpath, sizeof(fullpath), "%s/bandb", ircd_paths[IRCD_PATH_LIBEXEC]);
  85
  86                 if(access(fullpath, X_OK) == -1)
  87                 {
  88                         snprintf(fullpath, sizeof(fullpath), "%s/bin/bandb", ConfigFileEntry.dpath);
  89
  90                         if(access(fullpath, X_OK) == -1)
  91                         {
  92                                 ilog(L_MAIN,
  93                                      "Unable to execute bandb in %s or %s/bin",
  94                                      ircd_paths[IRCD_PATH_LIBEXEC], ConfigFileEntry.dpath);
  95                                 return 0;
  96                         }
  97                 }
  98                 bandb_path = rb_strdup(fullpath);
  99         }
 100
 101
 102         bandb_helper = rb_helper_start("bandb", bandb_path, bandb_parse, bandb_restart_cb);
 103
 104         if(bandb_helper == NULL)
 105         {
 106                 ilog(L_MAIN, "Unable to start bandb: %s", strerror(errno));
 107                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Unable to start bandb: %s",
 108                                      strerror(errno));
 109                 return 1;
 110         }
 111
 112         rb_helper_run(bandb_helper);
 113         return 0;
 114 }
 115
 116 void
 117 bandb_add(bandb_type type, struct Client *source_p, const char *mask1,
 118           const char *mask2, const char *reason, const char *oper_reason, int perm)
 119 {
 120         if(bandb_helper == NULL)
 121                 return;
 122
 123         static char buf[BUFSIZE];
 124
 125         snprintf(buf, sizeof(buf), "%c %s ", bandb_add_letter[type], mask1);
 126
 127         if(!EmptyString(mask2))
 128                 rb_snprintf_append(buf, sizeof(buf), "%s ", mask2);
 129
 130         rb_snprintf_append(buf, sizeof(buf), "%s %ld %d :%s",
 131                            get_oper_name(source_p), (long int)rb_current_time(), perm, reason);
 132
 133         if(!EmptyString(oper_reason))
 134                 rb_snprintf_append(buf, sizeof(buf), "|%s", oper_reason);
 135
 136         rb_helper_write(bandb_helper, "%s", buf);
 137 }
 138
 139 static char bandb_del_letter[LAST_BANDB_TYPE] = {
 140         'k', 'd', 'x', 'r'
 141 };
 142
 143 void
 144 bandb_del(bandb_type type, const char *mask1, const char *mask2)
 145 {
 146         if(bandb_helper == NULL)
 147                 return;
 148
 149         static char buf[BUFSIZE];
 150
 151         buf[0] = '\0';
 152
 153         rb_snprintf_append(buf, sizeof(buf), "%c %s", bandb_del_letter[type], mask1);
 154
 155         if(!EmptyString(mask2))
 156                 rb_snprintf_append(buf, sizeof(buf), " %s", mask2);
 157
 158         rb_helper_write(bandb_helper, "%s", buf);
 159 }
 160
 161 static void
 162 bandb_handle_ban(char *parv[], int parc)
 163 {
 164         struct ConfItem *aconf;
 165         char *p;
 166         int para = 1;
 167
 168         aconf = make_conf();
 169         aconf->port = 0;
 170
 171         if(parv[0][0] == 'K')
 172                 aconf->user = rb_strdup(parv[para++]);
 173
 174         aconf->host = rb_strdup(parv[para++]);
 175         aconf->info.oper = operhash_add(parv[para++]);
 176
 177         switch (parv[0][0])
 178         {
 179         case 'K':
 180                 aconf->status = CONF_KILL;
 181                 break;
 182
 183         case 'D':
 184                 aconf->status = CONF_DLINE;
 185                 break;
 186
 187         case 'X':
 188                 aconf->status = CONF_XLINE;
 189                 break;
 190
 191         case 'R':
 192                 if(IsChannelName(aconf->host))
 193                         aconf->status = CONF_RESV_CHANNEL;
 194                 else
 195                         aconf->status = CONF_RESV_NICK;
 196
 197                 break;
 198         }
 199
 200         if((p = strchr(parv[para], '|')))
 201         {
 202                 *p++ = '\0';
 203                 aconf->spasswd = rb_strdup(p);
 204         }
 205
 206         aconf->passwd = rb_strdup(parv[para]);
 207
 208         rb_dlinkAddAlloc(aconf, &bandb_pending);
 209 }
 210
 211 static int
 212 bandb_check_kline(struct ConfItem *aconf)
 213 {
 214         struct rb_sockaddr_storage daddr;
 215         struct ConfItem *kconf = NULL;
 216         int aftype;
 217         const char *p;
 218
 219         aftype = parse_netmask(aconf->host, &daddr, NULL);
 220
 221         if(aftype != HM_HOST)
 222         {
 223                 if(aftype == HM_IPV6)
 224                         aftype = AF_INET6;
 225                 else
 226                         aftype = AF_INET;
 227
 228                 kconf = find_conf_by_address(aconf->host, NULL, NULL, (struct sockaddr *)&daddr,
 229                                              CONF_KILL, aftype, aconf->user, NULL);
 230         }
 231         else
 232                 kconf = find_conf_by_address(aconf->host, NULL, NULL, NULL, CONF_KILL, 0, aconf->user, NULL);
 233
 234         if(kconf && ((kconf->flags & CONF_FLAGS_TEMPORARY) == 0))
 235                 return 0;
 236
 237         for(p = aconf->user; *p; p++)
 238         {
 239                 if(!IsUserChar(*p) && !IsKWildChar(*p))
 240                         return 0;
 241         }
 242
 243         for(p = aconf->host; *p; p++)
 244         {
 245                 if(!IsHostChar(*p) && !IsKWildChar(*p))
 246                         return 0;
 247         }
 248
 249         return 1;
 250 }
 251
 252 static int
 253 bandb_check_dline(struct ConfItem *aconf)
 254 {
 255         struct rb_sockaddr_storage daddr;
 256         int bits;
 257
 258         if(!parse_netmask(aconf->host, &daddr, &bits))
 259                 return 0;
 260
 261         return 1;
 262 }
 263
 264 static int
 265 bandb_check_xline(struct ConfItem *aconf)
 266 {
 267         struct ConfItem *xconf;
 268         /* XXX perhaps convert spaces to \s? -- jilles */
 269
 270         xconf = find_xline_mask(aconf->host);
 271         if(xconf != NULL && !(xconf->flags & CONF_FLAGS_TEMPORARY))
 272                 return 0;
 273
 274         return 1;
 275 }
 276
 277 static int
 278 bandb_check_resv_channel(struct ConfItem *aconf)
 279 {
 280         const char *p;
 281
 282         if(hash_find_resv(aconf->host) || strlen(aconf->host) > CHANNELLEN)
 283                 return 0;
 284
 285         for(p = aconf->host; *p; p++)
 286         {
 287                 if(!IsChanChar(*p))
 288                         return 0;
 289         }
 290
 291         return 1;
 292 }
 293
 294 static int
 295 bandb_check_resv_nick(struct ConfItem *aconf)
 296 {
 297         if(!clean_resv_nick(aconf->host))
 298                 return 0;
 299
 300         if(find_nick_resv(aconf->host))
 301                 return 0;
 302
 303         return 1;
 304 }
 305
 306 static void
 307 bandb_handle_clear(void)
 308 {
 309         rb_dlink_node *ptr, *next_ptr;
 310
 311         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, bandb_pending.head)
 312         {
 313                 free_conf(ptr->data);
 314                 rb_dlinkDestroy(ptr, &bandb_pending);
 315         }
 316 }
 317
 318 static void
 319 bandb_handle_finish(void)
 320 {
 321         struct ConfItem *aconf;
 322         rb_dlink_node *ptr, *next_ptr;
 323
 324         clear_out_address_conf(AC_BANDB);
 325         clear_s_newconf_bans();
 326
 327         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, bandb_pending.head)
 328         {
 329                 aconf = ptr->data;
 330
 331                 rb_dlinkDestroy(ptr, &bandb_pending);
 332
 333                 switch (aconf->status)
 334                 {
 335                 case CONF_KILL:
 336                         if(bandb_check_kline(aconf))
 337                                 add_conf_by_address(aconf->host, CONF_KILL, aconf->user, NULL, aconf);
 338                         else
 339                                 free_conf(aconf);
 340
 341                         break;
 342
 343                 case CONF_DLINE:
 344                         if(bandb_check_dline(aconf))
 345                                 add_conf_by_address(aconf->host, CONF_DLINE, aconf->user, NULL, aconf);
 346                         else
 347                                 free_conf(aconf);
 348
 349                         break;
 350
 351                 case CONF_XLINE:
 352                         if(bandb_check_xline(aconf))
 353                                 rb_dlinkAddAlloc(aconf, &xline_conf_list);
 354                         else
 355                                 free_conf(aconf);
 356
 357                         break;
 358
 359                 case CONF_RESV_CHANNEL:
 360                         if(bandb_check_resv_channel(aconf))
 361                                 add_to_resv_hash(aconf->host, aconf);
 362                         else
 363                                 free_conf(aconf);
 364
 365                         break;
 366
 367                 case CONF_RESV_NICK:
 368                         if(bandb_check_resv_nick(aconf))
 369                                 rb_dlinkAddAlloc(aconf, &resv_conf_list);
 370                         else
 371                                 free_conf(aconf);
 372
 373                         break;
 374                 }
 375         }
 376
 377         check_banned_lines();
 378 }
 379
 380 static void
 381 bandb_handle_failure(rb_helper *helper, char **parv, int parc)
 382 {
 383         if(server_state_foreground)
 384                 fprintf(stderr, "bandb - bandb failure: %s\n", parv[1]);
 385
 386         ilog(L_MAIN, "bandb - bandb failure: %s", parv[1]);
 387         sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "bandb - bandb failure: %s", parv[1]);
 388         exit(1);
 389 }
 390
 391 static void
 392 bandb_parse(rb_helper *helper)
 393 {
 394         static char buf[READBUF_SIZE];
 395         char *parv[MAXPARA];
 396         int len, parc;
 397
 398         while((len = rb_helper_read(helper, buf, sizeof(buf))))
 399         {
 400                 parc = rb_string_to_array(buf, parv, sizeof(parv));
 401
 402                 if(parc < 1)
 403                         continue;
 404
 405                 switch (parv[0][0])
 406                 {
 407                 case '!':
 408                         bandb_handle_failure(helper, parv, parc);
 409                         break;
 410                 case 'K':
 411                 case 'D':
 412                 case 'X':
 413                 case 'R':
 414                         bandb_handle_ban(parv, parc);
 415                         break;
 416
 417                 case 'C':
 418                         bandb_handle_clear();
 419                         break;
 420                 case 'F':
 421                         bandb_handle_finish();
 422                         break;
 423                 }
 424         }
 425 }
 426
 427 void
 428 bandb_rehash_bans(void)
 429 {
 430         if(bandb_helper != NULL)
 431                 rb_helper_write(bandb_helper, "L");
 432 }
 433
 434 static void
 435 bandb_restart_cb(rb_helper *helper)
 436 {
 437         ilog(L_MAIN, "bandb - bandb_restart_cb called, bandb helper died?");
 438         sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
 439                              "bandb - bandb_restart_cb called, bandb helper died?");
 440         if(helper != NULL)
 441         {
 442                 rb_helper_close(helper);
 443                 bandb_helper = NULL;
 444         }
 445         start_bandb();
 446         return;
 447 }