ircd/m_gline.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/m_gline.c
   3  * Copyright (C) 1990 Jarkko Oikarinen and
   4  *                    University of Oulu, Computing Center
   5  *
   6  * See file AUTHORS in IRC package for additional names of
   7  * the programmers.
   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 1, or (at your option)
  12  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  * $Id: m_gline.c,v 1.26 2004/12/11 05:13:46 klmitch Exp $
  24  */
  25
  26 /*
  27  * m_functions execute protocol messages on this server:
  28  *
  29  *    cptr    is always NON-NULL, pointing to a *LOCAL* client
  30  *            structure (with an open socket connected!). This
  31  *            identifies the physical socket where the message
  32  *            originated (or which caused the m_function to be
  33  *            executed--some m_functions may call others...).
  34  *
  35  *    sptr    is the source of the message, defined by the
  36  *            prefix part of the message if present. If not
  37  *            or prefix not found, then sptr==cptr.
  38  *
  39  *            (!IsServer(cptr)) => (cptr == sptr), because
  40  *            prefixes are taken *only* from servers...
  41  *
  42  *            (IsServer(cptr))
  43  *                    (sptr == cptr) => the message didn't
  44  *                    have the prefix.
  45  *
  46  *                    (sptr != cptr && IsServer(sptr) means
  47  *                    the prefix specified servername. (?)
  48  *
  49  *                    (sptr != cptr && !IsServer(sptr) means
  50  *                    that message originated from a remote
  51  *                    user (not local).
  52  *
  53  *            combining
  54  *
  55  *            (!IsServer(sptr)) means that, sptr can safely
  56  *            taken as defining the target structure of the
  57  *            message in this server.
  58  *
  59  *    *Always* true (if 'parse' and others are working correct):
  60  *
  61  *    1)      sptr->from == cptr  (note: cptr->from == cptr)
  62  *
  63  *    2)      MyConnect(sptr) <=> sptr == cptr (e.g. sptr
  64  *            *cannot* be a local connection, unless it's
  65  *            actually cptr!). [MyConnect(x) should probably
  66  *            be defined as (x == x->from) --msa ]
  67  *
  68  *    parc    number of variable parameter strings (if zero,
  69  *            parv is allowed to be NULL)
  70  *
  71  *    parv    a NULL terminated list of parameter pointers,
  72  *
  73  *                    parv[0], sender (prefix string), if not present
  74  *                            this points to an empty string.
  75  *                    parv[1]...parv[parc-1]
  76  *                            pointers to additional parameters
  77  *                    parv[parc] == NULL, *always*
  78  *
  79  *            note:   it is guaranteed that parv[0]..parv[parc-1] are all
  80  *                    non-NULL pointers.
  81  */
  82 #include "config.h"
  83
  84 #include "client.h"
  85 #include "gline.h"
  86 #include "hash.h"
  87 #include "ircd.h"
  88 #include "ircd_features.h"
  89 #include "ircd_log.h"
  90 #include "ircd_reply.h"
  91 #include "ircd_string.h"
  92 #include "match.h"
  93 #include "msg.h"
  94 #include "numeric.h"
  95 #include "numnicks.h"
  96 #include "s_conf.h"
  97 #include "s_misc.h"
  98 #include "send.h"
  99
 100 /* #include <assert.h> -- Now using assert in ircd_log.h */
 101 #include <stdlib.h>
 102 #include <string.h>
 103
 104 /*
 105  * ms_gline - server message handler
 106  *
 107  * parv[0] = Sender prefix
 108  * parv[1] = Target: server numeric
 109  * parv[2] = (+|-)<G-line mask>
 110  * parv[3] = G-line lifetime
 111  *
 112  * From Uworld:
 113  *
 114  * parv[4] = Comment
 115  *
 116  * From somewhere else:
 117  *
 118  * parv[4] = Last modification time
 119  * parv[5] = Comment
 120  *
 121  */
 122 int
 123 ms_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
 124 {
 125   struct Client *acptr = 0;
 126   struct Gline *agline;
 127   unsigned int flags = 0;
 128   time_t expire_off, lastmod = 0;
 129   char *mask = parv[2], *target = parv[1], *reason = "No reason";
 130
 131   if (*mask == '!')
 132   {
 133     mask++;
 134     flags |= GLINE_OPERFORCE; /* assume oper had WIDE_GLINE */
 135   }
 136
 137   if ((parc == 3 && *mask == '-') || parc == 5)
 138   {
 139     if (!find_conf_byhost(cli_confs(cptr), cli_name(sptr), CONF_UWORLD))
 140       return need_more_params(sptr, "GLINE");
 141
 142     if (parc > 4)
 143       reason = parv[4];
 144     flags |= GLINE_FORCE;
 145   }
 146   else if (parc > 5)
 147   {
 148     lastmod = atoi(parv[4]);
 149     reason = parv[5];
 150   }
 151   else
 152     return need_more_params(sptr, "GLINE");
 153
 154   if (IsServer(sptr))
 155     flags |= GLINE_FORCE;
 156
 157   if (!(target[0] == '*' && target[1] == '\0')) {
 158     if (!(acptr = FindNServer(target)))
 159       return 0; /* no such server */
 160
 161     if (!IsMe(acptr)) { /* manually propagate */
 162       if (!lastmod)
 163         sendcmdto_one(sptr, CMD_GLINE, acptr,
 164                       (parc == 3) ? "%C %s" : "%C %s %s :%s", acptr, mask,
 165                       parv[3], reason);
 166       else
 167         sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%s %s %s :%s", acptr,
 168                       flags & GLINE_OPERFORCE ? "!" : "", mask, parv[3],
 169                       parv[4], reason);
 170
 171       return 0;
 172     }
 173
 174     flags |= GLINE_LOCAL;
 175   }
 176
 177   if (*mask == '-')
 178     mask++;
 179   else if (*mask == '+') {
 180     flags |= GLINE_ACTIVE;
 181     mask++;
 182   } else
 183     flags |= GLINE_ACTIVE;
 184
 185   expire_off = parc < 5 ? 0 : atoi(parv[3]);
 186
 187   agline = gline_find(mask, GLINE_ANY | GLINE_EXACT);
 188
 189   if (agline) {
 190     if (GlineIsLocal(agline) && !(flags & GLINE_LOCAL)) /* global over local */
 191       gline_free(agline);
 192     else if (!lastmod && ((flags & GLINE_ACTIVE) == GlineIsRemActive(agline)))
 193       return gline_propagate(cptr, sptr, agline);
 194     else if (!lastmod || GlineLastMod(agline) < lastmod) { /* new mod */
 195       if (flags & GLINE_ACTIVE)
 196         return gline_activate(cptr, sptr, agline, lastmod, flags);
 197       else
 198         return gline_deactivate(cptr, sptr, agline, lastmod, flags);
 199     } else if (GlineLastMod(agline) == lastmod || IsBurstOrBurstAck(cptr))
 200       return 0;
 201     else
 202       return gline_resend(cptr, agline); /* other server desynched WRT gline */
 203   } else if (parc == 3 && !(flags & GLINE_ACTIVE)) {
 204     /* U-lined server removing a G-line we don't have; propagate the removal
 205      * anyway.
 206      */
 207     if (!(flags & GLINE_LOCAL))
 208       sendcmdto_serv_butone(sptr, CMD_GLINE, cptr, "* -%s", mask);
 209     return 0;
 210   } else if (parc < 5)
 211     return need_more_params(sptr, "GLINE");
 212
 213   return gline_add(cptr, sptr, mask, reason, expire_off, lastmod, flags);
 214 }
 215
 216 /*
 217  * mo_gline - oper message handler
 218  *
 219  * parv[0] = Sender prefix
 220  * parv[1] = [[+|-]<G-line mask>]
 221  *
 222  * Local (to me) style:
 223  *
 224  * parv[2] = [Expiration offset]
 225  * parv[3] = [Comment]
 226  *
 227  * Global (or remote local) style:
 228  *
 229  * parv[2] = [target]
 230  * parv[3] = [Expiration offset]
 231  * parv[4] = [Comment]
 232  *
 233  */
 234 int
 235 mo_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
 236 {
 237   struct Client *acptr = 0;
 238   struct Gline *agline;
 239   unsigned int flags = 0;
 240   time_t expire_off;
 241   char *mask = parv[1], *target = 0, *reason;
 242
 243   if (parc < 2)
 244     return gline_list(sptr, 0);
 245
 246   if (*mask == '!') {
 247     mask++;
 248
 249     if (HasPriv(sptr, PRIV_WIDE_GLINE))
 250       flags |= GLINE_OPERFORCE;
 251   }
 252
 253   if (*mask == '+') {
 254     flags |= GLINE_ACTIVE;
 255     mask++;
 256
 257   } else if (*mask == '-')
 258     mask++;
 259   else
 260     return gline_list(sptr, mask);
 261
 262   if (parc == 4) {
 263     expire_off = atoi(parv[2]);
 264     reason = parv[3];
 265     flags |= GLINE_LOCAL;
 266   } else if (parc > 4) {
 267     target = parv[2];
 268     expire_off = atoi(parv[3]);
 269     reason = parv[4];
 270   } else
 271     return need_more_params(sptr, "GLINE");
 272
 273   if (target)
 274   {
 275     if (!(target[0] == '*' && target[1] == '\0'))
 276     {
 277       if (!(acptr = find_match_server(target)))
 278         return send_reply(sptr, ERR_NOSUCHSERVER, target);
 279
 280       /* manually propagate, since we don't set it */
 281       if (!IsMe(acptr))
 282       {
 283         if (!feature_bool(FEAT_CONFIG_OPERCMDS))
 284           return send_reply(sptr, ERR_DISABLED, "GLINE");
 285
 286         if (!HasPriv(sptr, PRIV_GLINE))
 287           return send_reply(sptr, ERR_NOPRIVILEGES);
 288
 289         sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%c%s %s %Tu :%s", acptr,
 290                       flags & GLINE_OPERFORCE ? "!" : "",
 291                       flags & GLINE_ACTIVE ? '+' : '-', mask, parv[3],
 292                       TStime(), reason);
 293         return 0;
 294       }
 295       flags |= GLINE_LOCAL;
 296     }
 297   }
 298
 299   if (!(flags & GLINE_LOCAL) && !feature_bool(FEAT_CONFIG_OPERCMDS))
 300     return send_reply(sptr, ERR_DISABLED, "GLINE");
 301
 302   if (!HasPriv(sptr, (flags & GLINE_LOCAL ? PRIV_LOCAL_GLINE : PRIV_GLINE)))
 303     return send_reply(sptr, ERR_NOPRIVILEGES);
 304
 305   agline = gline_find(mask, GLINE_ANY | GLINE_EXACT);
 306
 307   if (agline) {
 308     if (GlineIsLocal(agline) && !(flags & GLINE_LOCAL)) /* global over local */
 309       gline_free(agline);
 310     else {
 311       if (!GlineLastMod(agline)) /* force mods to Uworld-set G-lines local */
 312         flags |= GLINE_LOCAL;
 313
 314       if (flags & GLINE_ACTIVE)
 315         return gline_activate(cptr, sptr, agline,
 316                               GlineLastMod(agline) ? TStime() : 0, flags);
 317       else
 318         return gline_deactivate(cptr, sptr, agline,
 319                                 GlineLastMod(agline) ? TStime() : 0, flags);
 320     }
 321   }
 322
 323   return gline_add(cptr, sptr, mask, reason, expire_off, TStime(), flags);
 324 }
 325
 326 /*
 327  * m_gline - user message handler
 328  *
 329  * parv[0] = Sender prefix
 330  * parv[1] = [<server name>]
 331  *
 332  */
 333 int
 334 m_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
 335 {
 336   if (feature_bool(FEAT_HIS_USERGLINE))
 337     return send_reply(sptr, ERR_DISABLED, "GLINE");
 338
 339   if (parc < 2)
 340     return send_reply(sptr, ERR_NOSUCHGLINE, "");
 341
 342   return gline_list(sptr, parv[1]);
 343 }