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 #ifdef _WIN32
  81         const char *suffix = ".exe";
  82 #else
  83         const char *suffix = "";
  84 #endif
  85
  86         rb_setenv("BANDB_DBPATH", ircd_paths[IRCD_PATH_BANDB], 1);
  87         if(bandb_path == NULL)
  88         {
  89                 snprintf(fullpath, sizeof(fullpath), "%s%cbandb%s", ircd_paths[IRCD_PATH_LIBEXEC], RB_PATH_SEPARATOR, suffix);
  90
  91                 if(access(fullpath, X_OK) == -1)
  92                 {
  93                         snprintf(fullpath, sizeof(fullpath), "%s%cbin%cbandb%s",
  94                                     ConfigFileEntry.dpath, RB_PATH_SEPARATOR, RB_PATH_SEPARATOR, suffix);
  95
  96                         if(access(fullpath, X_OK) == -1)
  97                         {
  98                                 ilog(L_MAIN,
  99                                      "Unable to execute bandb%s in %s or %s/bin",
 100                                      suffix, ircd_paths[IRCD_PATH_LIBEXEC], ConfigFileEntry.dpath);
 101                                 return 0;
 102                         }
 103                 }
 104                 bandb_path = rb_strdup(fullpath);
 105         }
 106
 107
 108         bandb_helper = rb_helper_start("bandb", bandb_path, bandb_parse, bandb_restart_cb);
 109
 110         if(bandb_helper == NULL)
 111         {
 112                 ilog(L_MAIN, "Unable to start bandb: %s", strerror(errno));
 113                 sendto_realops_snomask(SNO_GENERAL, L_ALL, "Unable to start bandb: %s",
 114                                      strerror(errno));
 115                 return 1;
 116         }
 117
 118         rb_helper_run(bandb_helper);
 119         return 0;
 120 }
 121
 122 void
 123 bandb_add(bandb_type type, struct Client *source_p, const char *mask1,
 124           const char *mask2, const char *reason, const char *oper_reason, int perm)
 125 {
 126         if(bandb_helper == NULL)
 127                 return;
 128
 129         static char buf[BUFSIZE];
 130
 131         snprintf(buf, sizeof(buf), "%c %s ", bandb_add_letter[type], mask1);
 132
 133         if(!EmptyString(mask2))
 134                 rb_snprintf_append(buf, sizeof(buf), "%s ", mask2);
 135
 136         rb_snprintf_append(buf, sizeof(buf), "%s %ld %d :%s",
 137                            get_oper_name(source_p), (long int)rb_current_time(), perm, reason);
 138
 139         if(!EmptyString(oper_reason))
 140                 rb_snprintf_append(buf, sizeof(buf), "|%s", oper_reason);
 141
 142         rb_helper_write(bandb_helper, "%s", buf);
 143 }
 144
 145 static char bandb_del_letter[LAST_BANDB_TYPE] = {
 146         'k', 'd', 'x', 'r'
 147 };
 148
 149 void
 150 bandb_del(bandb_type type, const char *mask1, const char *mask2)
 151 {
 152         if(bandb_helper == NULL)
 153                 return;
 154
 155         static char buf[BUFSIZE];
 156
 157         buf[0] = '\0';
 158
 159         rb_snprintf_append(buf, sizeof(buf), "%c %s", bandb_del_letter[type], mask1);
 160
 161         if(!EmptyString(mask2))
 162                 rb_snprintf_append(buf, sizeof(buf), " %s", mask2);
 163
 164         rb_helper_write(bandb_helper, "%s", buf);
 165 }
 166
 167 static void
 168 bandb_handle_ban(char *parv[], int parc)
 169 {
 170         struct ConfItem *aconf;
 171         char *p;
 172         int para = 1;
 173
 174         aconf = make_conf();
 175         aconf->port = 0;
 176
 177         if(parv[0][0] == 'K')
 178                 aconf->user = rb_strdup(parv[para++]);
 179
 180         aconf->host = rb_strdup(parv[para++]);
 181         aconf->info.oper = operhash_add(parv[para++]);
 182
 183         switch (parv[0][0])
 184         {
 185         case 'K':
 186                 aconf->status = CONF_KILL;
 187                 break;
 188
 189         case 'D':
 190                 aconf->status = CONF_DLINE;
 191                 break;
 192
 193         case 'X':
 194                 aconf->status = CONF_XLINE;
 195                 break;
 196
 197         case 'R':
 198                 if(IsChannelName(aconf->host))
 199                         aconf->status = CONF_RESV_CHANNEL;
 200                 else
 201                         aconf->status = CONF_RESV_NICK;
 202
 203                 break;
 204         }
 205
 206         if((p = strchr(parv[para], '|')))
 207         {
 208                 *p++ = '\0';
 209                 aconf->spasswd = rb_strdup(p);
 210         }
 211
 212         aconf->passwd = rb_strdup(parv[para]);
 213
 214         rb_dlinkAddAlloc(aconf, &bandb_pending);
 215 }
 216
 217 static int
 218 bandb_check_kline(struct ConfItem *aconf)
 219 {
 220         struct rb_sockaddr_storage daddr;
 221         struct ConfItem *kconf = NULL;
 222         int aftype;
 223         const char *p;
 224
 225         aftype = parse_netmask(aconf->host, &daddr, NULL);
 226
 227         if(aftype != HM_HOST)
 228         {
 229 #ifdef RB_IPV6
 230                 if(aftype == HM_IPV6)
 231                         aftype = AF_INET6;
 232                 else
 233 #endif
 234                         aftype = AF_INET;
 235
 236                 kconf = find_conf_by_address(aconf->host, NULL, NULL, (struct sockaddr *)&daddr,
 237                                              CONF_KILL, aftype, aconf->user, NULL);
 238         }
 239         else
 240                 kconf = find_conf_by_address(aconf->host, NULL, NULL, NULL, CONF_KILL, 0, aconf->user, NULL);
 241
 242         if(kconf && ((kconf->flags & CONF_FLAGS_TEMPORARY) == 0))
 243                 return 0;
 244
 245         for(p = aconf->user; *p; p++)
 246         {
 247                 if(!IsUserChar(*p) && !IsKWildChar(*p))
 248                         return 0;
 249         }
 250
 251         for(p = aconf->host; *p; p++)
 252         {
 253                 if(!IsHostChar(*p) && !IsKWildChar(*p))
 254                         return 0;
 255         }
 256
 257         return 1;
 258 }
 259
 260 static int
 261 bandb_check_dline(struct ConfItem *aconf)
 262 {
 263         struct rb_sockaddr_storage daddr;
 264         int bits;
 265
 266         if(!parse_netmask(aconf->host, &daddr, &bits))
 267                 return 0;
 268
 269         return 1;
 270 }
 271
 272 static int
 273 bandb_check_xline(struct ConfItem *aconf)
 274 {
 275         struct ConfItem *xconf;
 276         /* XXX perhaps convert spaces to \s? -- jilles */
 277
 278         xconf = find_xline_mask(aconf->host);
 279         if(xconf != NULL && !(xconf->flags & CONF_FLAGS_TEMPORARY))
 280                 return 0;
 281
 282         return 1;
 283 }
 284
 285 static int
 286 bandb_check_resv_channel(struct ConfItem *aconf)
 287 {
 288         const char *p;
 289
 290         if(hash_find_resv(aconf->host) || strlen(aconf->host) > CHANNELLEN)
 291                 return 0;
 292
 293         for(p = aconf->host; *p; p++)
 294         {
 295                 if(!IsChanChar(*p))
 296                         return 0;
 297         }
 298
 299         return 1;
 300 }
 301
 302 static int
 303 bandb_check_resv_nick(struct ConfItem *aconf)
 304 {
 305         if(!clean_resv_nick(aconf->host))
 306                 return 0;
 307
 308         if(find_nick_resv(aconf->host))
 309                 return 0;
 310
 311         return 1;
 312 }
 313
 314 static void
 315 bandb_handle_clear(void)
 316 {
 317         rb_dlink_node *ptr, *next_ptr;
 318
 319         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, bandb_pending.head)
 320         {
 321                 free_conf(ptr->data);
 322                 rb_dlinkDestroy(ptr, &bandb_pending);
 323         }
 324 }
 325
 326 static void
 327 bandb_handle_finish(void)
 328 {
 329         struct ConfItem *aconf;
 330         rb_dlink_node *ptr, *next_ptr;
 331
 332         clear_out_address_conf_bans();
 333         clear_s_newconf_bans();
 334
 335         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, bandb_pending.head)
 336         {
 337                 aconf = ptr->data;
 338
 339                 rb_dlinkDestroy(ptr, &bandb_pending);
 340
 341                 switch (aconf->status)
 342                 {
 343                 case CONF_KILL:
 344                         if(bandb_check_kline(aconf))
 345                                 add_conf_by_address(aconf->host, CONF_KILL, aconf->user, NULL, aconf);
 346                         else
 347                                 free_conf(aconf);
 348
 349                         break;
 350
 351                 case CONF_DLINE:
 352                         if(bandb_check_dline(aconf))
 353                                 add_conf_by_address(aconf->host, CONF_DLINE, aconf->user, NULL, aconf);
 354                         else
 355                                 free_conf(aconf);
 356
 357                         break;
 358
 359                 case CONF_XLINE:
 360                         if(bandb_check_xline(aconf))
 361                                 rb_dlinkAddAlloc(aconf, &xline_conf_list);
 362                         else
 363                                 free_conf(aconf);
 364
 365                         break;
 366
 367                 case CONF_RESV_CHANNEL:
 368                         if(bandb_check_resv_channel(aconf))
 369                                 add_to_resv_hash(aconf->host, aconf);
 370                         else
 371                                 free_conf(aconf);
 372
 373                         break;
 374
 375                 case CONF_RESV_NICK:
 376                         if(bandb_check_resv_nick(aconf))
 377                                 rb_dlinkAddAlloc(aconf, &resv_conf_list);
 378                         else
 379                                 free_conf(aconf);
 380
 381                         break;
 382                 }
 383         }
 384
 385         check_banned_lines();
 386 }
 387
 388 static void
 389 bandb_handle_failure(rb_helper *helper, char **parv, int parc)
 390 {
 391         if(server_state_foreground)
 392                 fprintf(stderr, "bandb - bandb failure: %s\n", parv[1]);
 393
 394         ilog(L_MAIN, "bandb - bandb failure: %s", parv[1]);
 395         sendto_realops_snomask(SNO_GENERAL, L_ALL, "bandb - bandb failure: %s", parv[1]);
 396         exit(1);
 397 }
 398
 399 static void
 400 bandb_parse(rb_helper *helper)
 401 {
 402         static char buf[READBUF_SIZE];
 403         char *parv[MAXPARA];
 404         int len, parc;
 405
 406         while((len = rb_helper_read(helper, buf, sizeof(buf))))
 407         {
 408                 parc = rb_string_to_array(buf, parv, sizeof(parv));
 409
 410                 if(parc < 1)
 411                         continue;
 412
 413                 switch (parv[0][0])
 414                 {
 415                 case '!':
 416                         bandb_handle_failure(helper, parv, parc);
 417                         break;
 418                 case 'K':
 419                 case 'D':
 420                 case 'X':
 421                 case 'R':
 422                         bandb_handle_ban(parv, parc);
 423                         break;
 424
 425                 case 'C':
 426                         bandb_handle_clear();
 427                         break;
 428                 case 'F':
 429                         bandb_handle_finish();
 430                         break;
 431                 }
 432         }
 433 }
 434
 435 void
 436 bandb_rehash_bans(void)
 437 {
 438         if(bandb_helper != NULL)
 439                 rb_helper_write(bandb_helper, "L");
 440 }
 441
 442 static void
 443 bandb_restart_cb(rb_helper *helper)
 444 {
 445         ilog(L_MAIN, "bandb - bandb_restart_cb called, bandb helper died?");
 446         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 447                              "bandb - bandb_restart_cb called, bandb helper died?");
 448         if(helper != NULL)
 449         {
 450                 rb_helper_close(helper);
 451                 bandb_helper = NULL;
 452         }
 453         start_bandb();
 454         return;
 455 }