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         loc++;
 100
 101         /* would break the protocol */
 102         if (*dlhost == ':')
 103         {
 104                 sendto_one_notice(source_p, ":Invalid D-Line");
 105                 return 0;
 106         }
 107
 108         if(parc >= loc + 2 && !irccmp(parv[loc], "ON"))
 109         {
 110                 if(!IsOperRemoteBan(source_p))
 111                 {
 112                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 113                                    me.name, source_p->name, "remoteban");
 114                         return 0;
 115                 }
 116
 117                 target_server = parv[loc + 1];
 118                 loc += 2;
 119         }
 120
 121         if(parc >= loc + 1 && !EmptyString(parv[loc]))
 122                 reason = LOCAL_COPY(parv[loc]);
 123
 124         if(target_server != NULL)
 125         {
 126                 sendto_match_servs(source_p, target_server,
 127                                    CAP_ENCAP, NOCAPS,
 128                                    "ENCAP %s DLINE %d %s :%s",
 129                                    target_server, tdline_time, dlhost, reason);
 130
 131                 if(!match(target_server, me.name))
 132                         return 0;
 133         }
 134
 135         apply_dline(source_p, dlhost, tdline_time, reason);
 136
 137         check_dlines();
 138         return 0;
 139 }
 140
 141 /* mo_undline()
 142  *
 143  *      parv[1] = dline to remove
 144  */
 145 static int
 146 mo_undline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 147 {
 148         const char *cidr;
 149         const char *target_server = NULL;
 150
 151         if(!IsOperK(source_p))
 152         {
 153                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "unkline");
 154                 return 0;
 155         }
 156
 157         cidr = parv[1];
 158
 159         if(parc >= 4 && !irccmp(parv[2], "ON"))
 160         {
 161                 if(!IsOperRemoteBan(source_p))
 162                 {
 163                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 164                                    me.name, source_p->name, "remoteban");
 165                         return 0;
 166                 }
 167
 168                 target_server = parv[3];
 169                 sendto_match_servs(source_p, target_server,
 170                                    CAP_ENCAP, NOCAPS, "ENCAP %s UNDLINE %s", target_server, cidr);
 171
 172                 if(!match(target_server, me.name))
 173                         return 0;
 174         }
 175
 176         apply_undline(source_p, cidr);
 177
 178         return 0;
 179 }
 180
 181 static int
 182 me_dline(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
 183 {
 184         int tdline_time = atoi(parv[1]);
 185         /* Since this is coming over a server link, assume that the originating
 186          * server did the relevant permission/sanity checks...
 187          */
 188
 189         if(!IsPerson(source_p))
 190                 return 0;
 191
 192         if(!find_shared_conf(source_p->username, source_p->host,
 193                              source_p->servptr->name,
 194                              tdline_time > 0 ? SHARED_TDLINE : SHARED_PDLINE))
 195                 return 0;
 196
 197         apply_dline(source_p, parv[2], tdline_time, LOCAL_COPY(parv[3]));
 198
 199         check_dlines();
 200         return 0;
 201 }
 202
 203 static int
 204 me_undline(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
 205 {
 206         if(!IsPerson(source_p))
 207                 return 0;
 208
 209         if(!find_shared_conf(source_p->username, source_p->host,
 210                              source_p->servptr->name, SHARED_UNDLINE))
 211                 return 0;
 212
 213         apply_undline(source_p, parv[1]);
 214
 215         return 0;
 216 }
 217
 218 static int
 219 apply_dline(struct Client *source_p, const char *dlhost, int tdline_time, char *reason)
 220 {
 221         struct ConfItem *aconf;
 222         char *oper_reason;
 223         struct rb_sockaddr_storage daddr;
 224         int t = AF_INET, ty, b;
 225         const char *creason;
 226
 227         ty = parse_netmask(dlhost, (struct sockaddr *) &daddr, &b);
 228         if(ty == HM_HOST)
 229         {
 230                 sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line", me.name, source_p->name);
 231                 return 0;
 232         }
 233 #ifdef RB_IPV6
 234         if(ty == HM_IPV6)
 235                 t = AF_INET6;
 236         else
 237 #endif
 238                 t = AF_INET;
 239
 240         /* This means dlines wider than /16 cannot be set remotely */
 241         if(IsOperAdmin(source_p))
 242         {
 243                 if(b < 8)
 244                 {
 245                         sendto_one_notice(source_p,
 246                                           ":For safety, bitmasks less than 8 require conf access.");
 247                         return 0;
 248                 }
 249         }
 250         else
 251         {
 252                 if(b < 16)
 253                 {
 254                         sendto_one_notice(source_p,
 255                                           ":Dline bitmasks less than 16 are for admins only.");
 256                         return 0;
 257                 }
 258         }
 259
 260         if(!valid_comment(reason))
 261         {
 262                 sendto_one(source_p,
 263                            ":%s NOTICE %s :Invalid character '\"' in comment",
 264                            me.name, source_p->name);
 265                 return 0;
 266         }
 267
 268         if(ConfigFileEntry.non_redundant_klines)
 269         {
 270                 if((aconf = find_dline((struct sockaddr *) &daddr, t)) != NULL)
 271                 {
 272                         int bx;
 273                         parse_netmask(aconf->host, NULL, &bx);
 274                         if(b >= bx)
 275                         {
 276                                 creason = aconf->passwd ? aconf->passwd : "<No Reason>";
 277                                 if(IsConfExemptKline(aconf))
 278                                         sendto_one(source_p,
 279                                                    ":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s",
 280                                                    me.name, source_p->name, dlhost, aconf->host,
 281                                                    creason);
 282                                 else
 283                                         sendto_one(source_p,
 284                                                    ":%s NOTICE %s :[%s] already D-lined by [%s] - %s",
 285                                                    me.name, source_p->name, dlhost, aconf->host,
 286                                                    creason);
 287                                 return 0;
 288                         }
 289                 }
 290         }
 291
 292         rb_set_time();
 293
 294         aconf = make_conf();
 295         aconf->status = CONF_DLINE;
 296         aconf->created = rb_current_time();
 297         aconf->host = rb_strdup(dlhost);
 298         aconf->passwd = rb_strdup(reason);
 299         aconf->info.oper = operhash_add(get_oper_name(source_p));
 300
 301         /* Look for an oper reason */
 302         if((oper_reason = strchr(reason, '|')) != NULL)
 303         {
 304                 *oper_reason = '\0';
 305                 oper_reason++;
 306
 307                 if(!EmptyString(oper_reason))
 308                         aconf->spasswd = rb_strdup(oper_reason);
 309         }
 310
 311         if(tdline_time > 0)
 312         {
 313                 aconf->hold = rb_current_time() + tdline_time;
 314                 add_temp_dline(aconf);
 315
 316                 if(EmptyString(oper_reason))
 317                 {
 318                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 319                                                "%s added temporary %d min. D-Line for [%s] [%s]",
 320                                                get_oper_name(source_p), tdline_time / 60,
 321                                                aconf->host, reason);
 322                         ilog(L_KLINE, "D %s %d %s %s",
 323                              get_oper_name(source_p), tdline_time / 60, aconf->host, reason);
 324                 }
 325                 else
 326                 {
 327                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 328                                                "%s added temporary %d min. D-Line for [%s] [%s|%s]",
 329                                                get_oper_name(source_p), tdline_time / 60,
 330                                                aconf->host, reason, oper_reason);
 331                         ilog(L_KLINE, "D %s %d %s %s|%s",
 332                              get_oper_name(source_p), tdline_time / 60,
 333                              aconf->host, reason, oper_reason);
 334                 }
 335
 336                 sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line for [%s]",
 337                            me.name, source_p->name, tdline_time / 60, aconf->host);
 338         }
 339         else
 340         {
 341                 add_conf_by_address(aconf->host, CONF_DLINE, NULL, NULL, aconf);
 342
 343                 bandb_add(BANDB_DLINE, source_p, aconf->host, NULL,
 344                           reason, EmptyString(aconf->spasswd) ? NULL : aconf->spasswd, 0);
 345
 346                 if(EmptyString(oper_reason))
 347                 {
 348                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 349                                                "%s added D-Line for [%s] [%s]",
 350                                                get_oper_name(source_p), aconf->host, reason);
 351                         ilog(L_KLINE, "D %s 0 %s %s",
 352                              get_oper_name(source_p), aconf->host, reason);
 353                 }
 354                 else
 355                 {
 356                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 357                                                "%s added D-Line for [%s] [%s|%s]",
 358                                                get_oper_name(source_p), aconf->host, reason, oper_reason);
 359                         ilog(L_KLINE, "D %s 0 %s %s|%s",
 360                              get_oper_name(source_p),
 361                              aconf->host, reason, oper_reason);
 362                 }
 363         }
 364
 365         return 0;
 366 }
 367
 368 static int
 369 apply_undline(struct Client *source_p, const char *cidr)
 370 {
 371         char buf[BUFSIZE];
 372         struct ConfItem *aconf;
 373
 374         if(parse_netmask(cidr, NULL, NULL) == HM_HOST)
 375         {
 376                 sendto_one_notice(source_p, ":Invalid D-Line");
 377                 return 0;
 378         }
 379
 380         aconf = find_exact_conf_by_address(cidr, CONF_DLINE, NULL);
 381         if(aconf == NULL)
 382         {
 383                 sendto_one_notice(source_p, ":No D-Line for %s", cidr);
 384                 return 0;
 385         }
 386
 387         rb_strlcpy(buf, aconf->host, sizeof buf);
 388         if(remove_temp_dline(aconf))
 389         {
 390                 sendto_one(source_p,
 391                            ":%s NOTICE %s :Un-dlined [%s] from temporary D-lines",
 392                            me.name, source_p->name, buf);
 393                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 394                                        "%s has removed the temporary D-Line for: [%s]",
 395                                        get_oper_name(source_p), buf);
 396                 ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), buf);
 397                 return 0;
 398         }
 399
 400         bandb_del(BANDB_DLINE, aconf->host, NULL);
 401
 402         sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, source_p->name,
 403                    aconf->host);
 404         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s has removed the D-Line for: [%s]",
 405                                get_oper_name(source_p), aconf->host);
 406         ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), aconf->host);
 407         delete_one_address_conf(aconf->host, aconf);
 408
 409         return 0;
 410 }
 411
 412 /*
 413  * valid_comment
 414  * inputs       - pointer to client
 415  *              - pointer to comment
 416  * output       - 0 if no valid comment, 1 if valid
 417  * side effects - NONE
 418  */
 419 static int
 420 valid_comment(char *comment)
 421 {
 422         if(strchr(comment, '"'))
 423                 return 0;
 424
 425         if(strlen(comment) > BANREASONLEN)
 426                 comment[BANREASONLEN] = '\0';
 427
 428         return 1;
 429 }
 430
 431 /* remove_temp_dline()
 432  *
 433  * inputs       - confitem to undline
 434  * outputs      -
 435  * side effects - tries to undline anything that matches
 436  */
 437 static int
 438 remove_temp_dline(struct ConfItem *aconf)
 439 {
 440         rb_dlink_node *ptr;
 441         int i;
 442
 443         for(i = 0; i < LAST_TEMP_TYPE; i++)
 444         {
 445                 RB_DLINK_FOREACH(ptr, temp_dlines[i].head)
 446                 {
 447                         if(aconf == ptr->data)
 448                         {
 449                                 rb_dlinkDestroy(ptr, &temp_dlines[i]);
 450                                 delete_one_address_conf(aconf->host, aconf);
 451                                 return YES;
 452                         }
 453                 }
 454         }
 455
 456         return NO;
 457 }