modules/m_dline.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_dline.c: Bans/unbans a user.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  *
  24  *  $Id$
  25  */
  26
  27 #include "stdinc.h"
  28 #include "channel.h"
  29 #include "class.h"
  30 #include "client.h"
  31 #include "common.h"
  32 #include "match.h"
  33 #include "ircd.h"
  34 #include "hostmask.h"
  35 #include "numeric.h"
  36 #include "s_conf.h"
  37 #include "s_newconf.h"
  38 #include "logger.h"
  39 #include "send.h"
  40 #include "hash.h"
  41 #include "s_serv.h"
  42 #include "msg.h"
  43 #include "parse.h"
  44 #include "modules.h"
  45 #include "bandbi.h"
  46 #include "operhash.h"
  47
  48 static int mo_dline(struct Client *, struct Client *, int, const char **);
  49 static int me_dline(struct Client *, struct Client *, int, const char **);
  50 static int mo_undline(struct Client *, struct Client *, int, const char **);
  51 static int me_undline(struct Client *, struct Client *, int, const char **);
  52
  53 struct Message dline_msgtab = {
  54         "DLINE", 0, 0, 0, MFLG_SLOW,
  55         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_dline, 3}, {mo_dline, 2}}
  56 };
  57
  58 struct Message undline_msgtab = {
  59         "UNDLINE", 0, 0, 0, MFLG_SLOW,
  60         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_undline, 1}, {mo_undline, 2}}
  61 };
  62
  63 mapi_clist_av1 dline_clist[] = { &dline_msgtab, &undline_msgtab, NULL };
  64
  65 DECLARE_MODULE_AV1(dline, NULL, NULL, dline_clist, NULL, NULL, "$Revision$");
  66
  67 static int valid_comment(char *comment);
  68 static int remove_temp_dline(struct ConfItem *);
  69 static int apply_dline(struct Client *, const char *, int, char *);
  70 static int apply_undline(struct Client *, const char *);
  71
  72 /* mo_dline()
  73  *
  74  *   parv[1] - dline to add
  75  *   parv[2] - reason
  76  */
  77 static int
  78 mo_dline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  79 {
  80         char def[] = "No Reason";
  81         const char *dlhost;
  82         char *reason = def;
  83         char cidr_form_host[HOSTLEN + 1];
  84         int tdline_time = 0;
  85         const char *target_server = NULL;
  86         int loc = 1;
  87
  88         if(!IsOperK(source_p))
  89         {
  90                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "kline");
  91                 return 0;
  92         }
  93
  94         if((tdline_time = valid_temp_time(parv[loc])) >= 0)
  95                 loc++;
  96
  97         dlhost = parv[loc];
  98         rb_strlcpy(cidr_form_host, dlhost, sizeof(cidr_form_host));
  99
 100         loc++;
 101
 102         if(parc >= loc + 2 && !irccmp(parv[loc], "ON"))
 103         {
 104                 if(!IsOperRemoteBan(source_p))
 105                 {
 106                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 107                                    me.name, source_p->name, "remoteban");
 108                         return 0;
 109                 }
 110
 111                 target_server = parv[loc + 1];
 112                 loc += 2;
 113         }
 114
 115         if(parc >= loc + 1 && !EmptyString(parv[loc]))
 116                 reason = LOCAL_COPY(parv[loc]);
 117
 118         if(target_server != NULL)
 119         {
 120                 sendto_match_servs(source_p, target_server,
 121                                    CAP_ENCAP, NOCAPS,
 122                                    "ENCAP %s DLINE %d %s :%s",
 123                                    target_server, tdline_time, dlhost, reason);
 124
 125                 if(!match(target_server, me.name))
 126                         return 0;
 127         }
 128
 129         apply_dline(source_p, dlhost, tdline_time, reason);
 130
 131         check_dlines();
 132         return 0;
 133 }
 134
 135 /* mo_undline()
 136  *
 137  *      parv[1] = dline to remove
 138  */
 139 static int
 140 mo_undline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 141 {
 142         const char *cidr;
 143         const char *target_server = NULL;
 144
 145         if(!IsOperK(source_p))
 146         {
 147                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "unkline");
 148                 return 0;
 149         }
 150
 151         cidr = parv[1];
 152
 153         if(parc >= 4 && !irccmp(parv[2], "ON"))
 154         {
 155                 if(!IsOperRemoteBan(source_p))
 156                 {
 157                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 158                                    me.name, source_p->name, "remoteban");
 159                         return 0;
 160                 }
 161
 162                 target_server = parv[3];
 163                 sendto_match_servs(source_p, target_server,
 164                                    CAP_ENCAP, NOCAPS, "ENCAP %s UNDLINE %s", target_server, cidr);
 165
 166                 if(!match(target_server, me.name))
 167                         return 0;
 168         }
 169
 170         apply_undline(source_p, cidr);
 171
 172         return 0;
 173 }
 174
 175 static int
 176 me_dline(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
 177 {
 178         int tdline_time = atoi(parv[1]);
 179         /* Since this is coming over a server link, assume that the originating
 180          * server did the relevant permission/sanity checks...
 181          */
 182
 183         if(!IsPerson(source_p))
 184                 return 0;
 185
 186         if(!find_shared_conf(source_p->username, source_p->host,
 187                              source_p->servptr->name,
 188                              tdline_time > 0 ? SHARED_TDLINE : SHARED_PDLINE))
 189                 return 0;
 190
 191         apply_dline(source_p, parv[2], tdline_time, LOCAL_COPY(parv[3]));
 192
 193         check_dlines();
 194         return 0;
 195 }
 196
 197 static int
 198 me_undline(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
 199 {
 200         if(!IsPerson(source_p))
 201                 return 0;
 202
 203         if(!find_shared_conf(source_p->username, source_p->host,
 204                              source_p->servptr->name, SHARED_UNDLINE))
 205                 return 0;
 206
 207         apply_undline(source_p, parv[1]);
 208
 209         return 0;
 210 }
 211
 212 static int
 213 apply_dline(struct Client *source_p, const char *dlhost, int tdline_time, char *reason)
 214 {
 215         struct ConfItem *aconf;
 216         char *oper_reason;
 217         struct rb_sockaddr_storage daddr;
 218         int t = AF_INET, ty, b;
 219         const char *creason;
 220
 221         ty = parse_netmask(dlhost, (struct sockaddr *) &daddr, &b);
 222         if(ty == HM_HOST)
 223         {
 224                 sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line", me.name, source_p->name);
 225                 return 0;
 226         }
 227 #ifdef RB_IPV6
 228         if(ty == HM_IPV6)
 229                 t = AF_INET6;
 230         else
 231 #endif
 232                 t = AF_INET;
 233
 234         /* This means dlines wider than /16 cannot be set remotely */
 235         if(IsOperAdmin(source_p))
 236         {
 237                 if(b < 8)
 238                 {
 239                         sendto_one_notice(source_p,
 240                                           ":For safety, bitmasks less than 8 require conf access.");
 241                         return 0;
 242                 }
 243         }
 244         else
 245         {
 246                 if(b < 16)
 247                 {
 248                         sendto_one_notice(source_p,
 249                                           ":Dline bitmasks less than 16 are for admins only.");
 250                         return 0;
 251                 }
 252         }
 253
 254         if(!valid_comment(reason))
 255         {
 256                 sendto_one(source_p,
 257                            ":%s NOTICE %s :Invalid character '\"' in comment",
 258                            me.name, source_p->name);
 259                 return 0;
 260         }
 261
 262         if(ConfigFileEntry.non_redundant_klines)
 263         {
 264                 if((aconf = find_dline((struct sockaddr *) &daddr, t)) != NULL)
 265                 {
 266                         int bx;
 267                         parse_netmask(aconf->host, NULL, &bx);
 268                         if(b >= bx)
 269                         {
 270                                 creason = aconf->passwd ? aconf->passwd : "<No Reason>";
 271                                 if(IsConfExemptKline(aconf))
 272                                         sendto_one(source_p,
 273                                                    ":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s",
 274                                                    me.name, source_p->name, dlhost, aconf->host,
 275                                                    creason);
 276                                 else
 277                                         sendto_one(source_p,
 278                                                    ":%s NOTICE %s :[%s] already D-lined by [%s] - %s",
 279                                                    me.name, source_p->name, dlhost, aconf->host,
 280                                                    creason);
 281                                 return 0;
 282                         }
 283                 }
 284         }
 285
 286         rb_set_time();
 287
 288         aconf = make_conf();
 289         aconf->status = CONF_DLINE;
 290         aconf->created = rb_current_time();
 291         aconf->host = rb_strdup(dlhost);
 292         aconf->passwd = rb_strdup(reason);
 293         aconf->info.oper = operhash_add(get_oper_name(source_p));
 294
 295         /* Look for an oper reason */
 296         if((oper_reason = strchr(reason, '|')) != NULL)
 297         {
 298                 *oper_reason = '\0';
 299                 oper_reason++;
 300
 301                 if(!EmptyString(oper_reason))
 302                         aconf->spasswd = rb_strdup(oper_reason);
 303         }
 304
 305         if(tdline_time > 0)
 306         {
 307                 aconf->hold = rb_current_time() + tdline_time;
 308                 add_temp_dline(aconf);
 309
 310                 if(EmptyString(oper_reason))
 311                 {
 312                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 313                                                "%s added temporary %d min. D-Line for [%s] [%s]",
 314                                                get_oper_name(source_p), tdline_time / 60,
 315                                                aconf->host, reason);
 316                         ilog(L_KLINE, "D %s %d %s %s",
 317                              get_oper_name(source_p), tdline_time / 60, aconf->host, reason);
 318                 }
 319                 else
 320                 {
 321                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 322                                                "%s added temporary %d min. D-Line for [%s] [%s|%s]",
 323                                                get_oper_name(source_p), tdline_time / 60,
 324                                                aconf->host, reason, oper_reason);
 325                         ilog(L_KLINE, "D %s %d %s %s|%s",
 326                              get_oper_name(source_p), tdline_time / 60,
 327                              aconf->host, reason, oper_reason);
 328                 }
 329
 330                 sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line for [%s]",
 331                            me.name, source_p->name, tdline_time / 60, aconf->host);
 332         }
 333         else
 334         {
 335                 add_conf_by_address(aconf->host, CONF_DLINE, NULL, NULL, aconf);
 336
 337                 bandb_add(BANDB_DLINE, source_p, aconf->host, NULL,
 338                           reason, EmptyString(aconf->spasswd) ? NULL : aconf->spasswd, 0);
 339
 340                 if(EmptyString(oper_reason))
 341                 {
 342                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 343                                                "%s added D-Line for [%s] [%s]",
 344                                                get_oper_name(source_p), aconf->host, reason);
 345                         ilog(L_KLINE, "D %s 0 %s %s",
 346                              get_oper_name(source_p), aconf->host, reason);
 347                 }
 348                 else
 349                 {
 350                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 351                                                "%s added D-Line for [%s] [%s|%s]",
 352                                                get_oper_name(source_p), aconf->host, reason, oper_reason);
 353                         ilog(L_KLINE, "D %s 0 %s %s|%s",
 354                              get_oper_name(source_p),
 355                              aconf->host, reason, oper_reason);
 356                 }
 357         }
 358
 359         return 0;
 360 }
 361
 362 static int
 363 apply_undline(struct Client *source_p, const char *cidr)
 364 {
 365         char buf[BUFSIZE];
 366         struct ConfItem *aconf;
 367
 368         if(parse_netmask(cidr, NULL, NULL) == HM_HOST)
 369         {
 370                 sendto_one_notice(source_p, ":Invalid D-Line");
 371                 return 0;
 372         }
 373
 374         aconf = find_exact_conf_by_address(cidr, CONF_DLINE, NULL);
 375         if(aconf == NULL)
 376         {
 377                 sendto_one_notice(source_p, ":No D-Line for %s", cidr);
 378                 return 0;
 379         }
 380
 381         rb_strlcpy(buf, aconf->host, sizeof buf);
 382         if(remove_temp_dline(aconf))
 383         {
 384                 sendto_one(source_p,
 385                            ":%s NOTICE %s :Un-dlined [%s] from temporary D-lines",
 386                            me.name, source_p->name, buf);
 387                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 388                                        "%s has removed the temporary D-Line for: [%s]",
 389                                        get_oper_name(source_p), buf);
 390                 ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), buf);
 391                 return 0;
 392         }
 393
 394         bandb_del(BANDB_DLINE, aconf->host, NULL);
 395
 396         sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, source_p->name,
 397                    aconf->host);
 398         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s has removed the D-Line for: [%s]",
 399                                get_oper_name(source_p), aconf->host);
 400         ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), aconf->host);
 401         delete_one_address_conf(aconf->host, aconf);
 402
 403         return 0;
 404 }
 405
 406 /*
 407  * valid_comment
 408  * inputs       - pointer to client
 409  *              - pointer to comment
 410  * output       - 0 if no valid comment, 1 if valid
 411  * side effects - NONE
 412  */
 413 static int
 414 valid_comment(char *comment)
 415 {
 416         if(strchr(comment, '"'))
 417                 return 0;
 418
 419         if(strlen(comment) > BANREASONLEN)
 420                 comment[BANREASONLEN] = '\0';
 421
 422         return 1;
 423 }
 424
 425 /* remove_temp_dline()
 426  *
 427  * inputs       - confitem to undline
 428  * outputs      -
 429  * side effects - tries to undline anything that matches
 430  */
 431 static int
 432 remove_temp_dline(struct ConfItem *aconf)
 433 {
 434         rb_dlink_node *ptr;
 435         int i;
 436
 437         for(i = 0; i < LAST_TEMP_TYPE; i++)
 438         {
 439                 RB_DLINK_FOREACH(ptr, temp_dlines[i].head)
 440                 {
 441                         if(aconf == ptr->data)
 442                         {
 443                                 rb_dlinkDestroy(ptr, &temp_dlines[i]);
 444                                 delete_one_address_conf(aconf->host, aconf);
 445                                 return YES;
 446                         }
 447                 }
 448         }
 449
 450         return NO;
 451 }