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
  47 static int mo_dline(struct Client *, struct Client *, int, const char **);
  48 static int me_dline(struct Client *, struct Client *, int, const char **);
  49 static int mo_undline(struct Client *, struct Client *, int, const char **);
  50 static int me_undline(struct Client *, struct Client *, int, const char **);
  51
  52 struct Message dline_msgtab = {
  53         "DLINE", 0, 0, 0, MFLG_SLOW,
  54         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_dline, 3}, {mo_dline, 2}}
  55 };
  56
  57 struct Message undline_msgtab = {
  58         "UNDLINE", 0, 0, 0, MFLG_SLOW,
  59         {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_undline, 1}, {mo_undline, 2}}
  60 };
  61
  62 mapi_clist_av1 dline_clist[] = { &dline_msgtab, &undline_msgtab, NULL };
  63
  64 DECLARE_MODULE_AV1(dline, NULL, NULL, dline_clist, NULL, NULL, "$Revision$");
  65
  66 static int valid_comment(char *comment);
  67 static int remove_temp_dline(struct ConfItem *);
  68 static int apply_dline(struct Client *, const char *, int, char *);
  69 static int apply_undline(struct Client *, const char *);
  70
  71 /* mo_dline()
  72  *
  73  *   parv[1] - dline to add
  74  *   parv[2] - reason
  75  */
  76 static int
  77 mo_dline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  78 {
  79         char def[] = "No Reason";
  80         const char *dlhost;
  81         char *reason = def;
  82         char cidr_form_host[HOSTLEN + 1];
  83         int tdline_time = 0;
  84         const char *target_server = NULL;
  85         int loc = 1;
  86
  87         if(!IsOperK(source_p))
  88         {
  89                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "kline");
  90                 return 0;
  91         }
  92
  93         if((tdline_time = valid_temp_time(parv[loc])) >= 0)
  94                 loc++;
  95
  96         dlhost = parv[loc];
  97         rb_strlcpy(cidr_form_host, dlhost, sizeof(cidr_form_host));
  98
  99         loc++;
 100
 101         if(parc >= loc + 2 && !irccmp(parv[loc], "ON"))
 102         {
 103                 if(!IsOperRemoteBan(source_p))
 104                 {
 105                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 106                                    me.name, source_p->name, "remoteban");
 107                         return 0;
 108                 }
 109
 110                 target_server = parv[loc + 1];
 111                 loc += 2;
 112         }
 113
 114         if(parc >= loc + 1 && !EmptyString(parv[loc]))
 115                 reason = LOCAL_COPY(parv[loc]);
 116
 117         if(target_server != NULL)
 118         {
 119                 sendto_match_servs(source_p, target_server,
 120                                    CAP_ENCAP, NOCAPS,
 121                                    "ENCAP %s DLINE %d %s :%s",
 122                                    target_server, tdline_time, dlhost, reason);
 123
 124                 if(!match(target_server, me.name))
 125                         return 0;
 126         }
 127
 128         apply_dline(source_p, dlhost, tdline_time, reason);
 129
 130         check_dlines();
 131         return 0;
 132 }
 133
 134 /* mo_undline()
 135  *
 136  *      parv[1] = dline to remove
 137  */
 138 static int
 139 mo_undline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 140 {
 141         const char *cidr;
 142         const char *target_server = NULL;
 143
 144         if(!IsOperK(source_p))
 145         {
 146                 sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "unkline");
 147                 return 0;
 148         }
 149
 150         cidr = parv[1];
 151
 152         if(parc >= 4 && !irccmp(parv[2], "ON"))
 153         {
 154                 if(!IsOperRemoteBan(source_p))
 155                 {
 156                         sendto_one(source_p, form_str(ERR_NOPRIVS),
 157                                    me.name, source_p->name, "remoteban");
 158                         return 0;
 159                 }
 160
 161                 target_server = parv[3];
 162                 sendto_match_servs(source_p, target_server,
 163                                    CAP_ENCAP, NOCAPS, "ENCAP %s UNDLINE %s", target_server, cidr);
 164
 165                 if(!match(target_server, me.name))
 166                         return 0;
 167         }
 168
 169         apply_undline(source_p, cidr);
 170
 171         return 0;
 172 }
 173
 174 static int
 175 me_dline(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
 176 {
 177         int tdline_time = atoi(parv[1]);
 178         /* Since this is coming over a server link, assume that the originating
 179          * server did the relevant permission/sanity checks...
 180          */
 181
 182         if(!IsPerson(source_p))
 183                 return 0;
 184
 185         if(!find_shared_conf(source_p->username, source_p->host,
 186                              source_p->servptr->name,
 187                              tdline_time > 0 ? SHARED_TDLINE : SHARED_PDLINE))
 188                 return 0;
 189
 190         apply_dline(source_p, parv[2], tdline_time, LOCAL_COPY(parv[3]));
 191
 192         check_dlines();
 193         return 0;
 194 }
 195
 196 static int
 197 me_undline(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
 198 {
 199         if(!IsPerson(source_p))
 200                 return 0;
 201
 202         if(!find_shared_conf(source_p->username, source_p->host,
 203                              source_p->servptr->name, SHARED_UNDLINE))
 204                 return 0;
 205
 206         apply_undline(source_p, parv[1]);
 207
 208         return 0;
 209 }
 210
 211 static int
 212 apply_dline(struct Client *source_p, const char *dlhost, int tdline_time, char *reason)
 213 {
 214         struct ConfItem *aconf;
 215         char *oper_reason;
 216         char dlbuffer[IRCD_BUFSIZE];
 217         const char *current_date;
 218         struct rb_sockaddr_storage daddr;
 219         int t = AF_INET, ty, b;
 220         const char *creason;
 221
 222         ty = parse_netmask(dlhost, (struct sockaddr *) &daddr, &b);
 223         if(ty == HM_HOST)
 224         {
 225                 sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line", me.name, source_p->name);
 226                 return 0;
 227         }
 228 #ifdef RB_IPV6
 229         if(ty == HM_IPV6)
 230                 t = AF_INET6;
 231         else
 232 #endif
 233                 t = AF_INET;
 234
 235         /* This means dlines wider than /16 cannot be set remotely */
 236         if(IsOperAdmin(source_p))
 237         {
 238                 if(b < 8)
 239                 {
 240                         sendto_one_notice(source_p,
 241                                           ":For safety, bitmasks less than 8 require conf access.");
 242                         return 0;
 243                 }
 244         }
 245         else
 246         {
 247                 if(b < 16)
 248                 {
 249                         sendto_one_notice(source_p,
 250                                           ":Dline bitmasks less than 16 are for admins only.");
 251                         return 0;
 252                 }
 253         }
 254
 255         if(!valid_comment(reason))
 256         {
 257                 sendto_one(source_p,
 258                            ":%s NOTICE %s :Invalid character '\"' in comment",
 259                            me.name, source_p->name);
 260                 return 0;
 261         }
 262
 263         if(ConfigFileEntry.non_redundant_klines)
 264         {
 265                 if((aconf = find_dline((struct sockaddr *) &daddr, t)) != NULL)
 266                 {
 267                         int bx;
 268                         parse_netmask(aconf->host, NULL, &bx);
 269                         if(b >= bx)
 270                         {
 271                                 creason = aconf->passwd ? aconf->passwd : "<No Reason>";
 272                                 if(IsConfExemptKline(aconf))
 273                                         sendto_one(source_p,
 274                                                    ":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s",
 275                                                    me.name, source_p->name, dlhost, aconf->host,
 276                                                    creason);
 277                                 else
 278                                         sendto_one(source_p,
 279                                                    ":%s NOTICE %s :[%s] already D-lined by [%s] - %s",
 280                                                    me.name, source_p->name, dlhost, aconf->host,
 281                                                    creason);
 282                                 return 0;
 283                         }
 284                 }
 285         }
 286
 287         rb_set_time();
 288         current_date = smalldate();
 289
 290         aconf = make_conf();
 291         aconf->status = CONF_DLINE;
 292         aconf->host = rb_strdup(dlhost);
 293
 294         /* Look for an oper reason */
 295         if((oper_reason = strchr(reason, '|')) != NULL)
 296         {
 297                 *oper_reason = '\0';
 298                 oper_reason++;
 299
 300                 if(!EmptyString(oper_reason))
 301                         aconf->spasswd = rb_strdup(oper_reason);
 302         }
 303
 304         if(tdline_time > 0)
 305         {
 306                 rb_snprintf(dlbuffer, sizeof(dlbuffer),
 307                             "Temporary D-line %d min. - %s (%s)",
 308                             (int) (tdline_time / 60), reason, current_date);
 309                 aconf->passwd = rb_strdup(dlbuffer);
 310                 aconf->hold = rb_current_time() + tdline_time;
 311                 add_temp_dline(aconf);
 312
 313                 if(EmptyString(oper_reason))
 314                 {
 315                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 316                                                "%s added temporary %d min. D-Line for [%s] [%s]",
 317                                                get_oper_name(source_p), tdline_time / 60,
 318                                                aconf->host, reason);
 319                         ilog(L_KLINE, "D %s %d %s %s",
 320                              get_oper_name(source_p), tdline_time / 60, aconf->host, reason);
 321                 }
 322                 else
 323                 {
 324                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
 325                                                "%s added temporary %d min. D-Line for [%s] [%s|%s]",
 326                                                get_oper_name(source_p), tdline_time / 60,
 327                                                aconf->host, reason, oper_reason);
 328                         ilog(L_KLINE, "D %s %d %s %s|%s",
 329                              get_oper_name(source_p), tdline_time / 60,
 330                              aconf->host, reason, oper_reason);
 331                 }
 332
 333                 sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line for [%s]",
 334                            me.name, source_p->name, tdline_time / 60, aconf->host);
 335         }
 336         else
 337         {
 338                 rb_snprintf(dlbuffer, sizeof(dlbuffer), "%s (%s)", reason, current_date);
 339                 aconf->passwd = rb_strdup(dlbuffer);
 340                 add_conf_by_address(aconf->host, CONF_DLINE, NULL, NULL, aconf);
 341
 342                 bandb_add(BANDB_DLINE, source_p, aconf->host, NULL,
 343                           reason, EmptyString(aconf->spasswd) ? NULL : aconf->spasswd, 0);
 344         }
 345
 346         return 0;
 347 }
 348
 349 static int
 350 apply_undline(struct Client *source_p, const char *cidr)
 351 {
 352         char buf[BUFSIZE];
 353         struct ConfItem *aconf;
 354
 355         if(parse_netmask(cidr, NULL, NULL) == HM_HOST)
 356         {
 357                 sendto_one_notice(source_p, ":Invalid D-Line");
 358                 return 0;
 359         }
 360
 361         aconf = find_exact_conf_by_address(cidr, CONF_DLINE, NULL);
 362         if(aconf == NULL)
 363         {
 364                 sendto_one_notice(source_p, ":No D-Line for %s", cidr);
 365                 return 0;
 366         }
 367
 368         rb_strlcpy(buf, aconf->host, sizeof buf);
 369         if(remove_temp_dline(aconf))
 370         {
 371                 sendto_one(source_p,
 372                            ":%s NOTICE %s :Un-dlined [%s] from temporary D-lines",
 373                            me.name, source_p->name, buf);
 374                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
 375                                        "%s has removed the temporary D-Line for: [%s]",
 376                                        get_oper_name(source_p), buf);
 377                 ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), buf);
 378                 return 0;
 379         }
 380
 381         bandb_del(BANDB_DLINE, aconf->host, NULL);
 382
 383         sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, source_p->name,
 384                    aconf->host);
 385         sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s has removed the D-Line for: [%s]",
 386                                get_oper_name(source_p), aconf->host);
 387         ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), aconf->host);
 388         delete_one_address_conf(aconf->host, aconf);
 389
 390         return 0;
 391 }
 392
 393 /*
 394  * valid_comment
 395  * inputs       - pointer to client
 396  *              - pointer to comment
 397  * output       - 0 if no valid comment, 1 if valid
 398  * side effects - NONE
 399  */
 400 static int
 401 valid_comment(char *comment)
 402 {
 403         if(strchr(comment, '"'))
 404                 return 0;
 405
 406         if(strlen(comment) > BANREASONLEN)
 407                 comment[BANREASONLEN] = '\0';
 408
 409         return 1;
 410 }
 411
 412 /* remove_temp_dline()
 413  *
 414  * inputs       - confitem to undline
 415  * outputs      -
 416  * side effects - tries to undline anything that matches
 417  */
 418 static int
 419 remove_temp_dline(struct ConfItem *aconf)
 420 {
 421         rb_dlink_node *ptr;
 422         int i;
 423
 424         for(i = 0; i < LAST_TEMP_TYPE; i++)
 425         {
 426                 RB_DLINK_FOREACH(ptr, temp_dlines[i].head)
 427                 {
 428                         if(aconf == ptr->data)
 429                         {
 430                                 rb_dlinkDestroy(ptr, &temp_dlines[i]);
 431                                 delete_one_address_conf(aconf->host, aconf);
 432                                 return YES;
 433                         }
 434                 }
 435         }
 436
 437         return NO;
 438 }