ircd/m_jupe.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/m_jupe.c
   3  * Copyright (C) 1990 Jarkko Oikarinen and
   4  *                    University of Oulu, Computing Center
   5  * Copyright (C) 2000 Kevin L. Mitchell <klmitch@mit.edu>
   6  *
   7  * See file AUTHORS in IRC package for additional names of
   8  * the programmers.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 1, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  * $Id: m_jupe.c,v 1.15 2004/12/11 05:13:47 klmitch Exp $
  25  */
  26
  27 /*
  28  * m_functions execute protocol messages on this server:
  29  *
  30  *    cptr    is always NON-NULL, pointing to a *LOCAL* client
  31  *            structure (with an open socket connected!). This
  32  *            identifies the physical socket where the message
  33  *            originated (or which caused the m_function to be
  34  *            executed--some m_functions may call others...).
  35  *
  36  *    sptr    is the source of the message, defined by the
  37  *            prefix part of the message if present. If not
  38  *            or prefix not found, then sptr==cptr.
  39  *
  40  *            (!IsServer(cptr)) => (cptr == sptr), because
  41  *            prefixes are taken *only* from servers...
  42  *
  43  *            (IsServer(cptr))
  44  *                    (sptr == cptr) => the message didn't
  45  *                    have the prefix.
  46  *
  47  *                    (sptr != cptr && IsServer(sptr) means
  48  *                    the prefix specified servername. (?)
  49  *
  50  *                    (sptr != cptr && !IsServer(sptr) means
  51  *                    that message originated from a remote
  52  *                    user (not local).
  53  *
  54  *            combining
  55  *
  56  *            (!IsServer(sptr)) means that, sptr can safely
  57  *            taken as defining the target structure of the
  58  *            message in this server.
  59  *
  60  *    *Always* true (if 'parse' and others are working correct):
  61  *
  62  *    1)      sptr->from == cptr  (note: cptr->from == cptr)
  63  *
  64  *    2)      MyConnect(sptr) <=> sptr == cptr (e.g. sptr
  65  *            *cannot* be a local connection, unless it's
  66  *            actually cptr!). [MyConnect(x) should probably
  67  *            be defined as (x == x->from) --msa ]
  68  *
  69  *    parc    number of variable parameter strings (if zero,
  70  *            parv is allowed to be NULL)
  71  *
  72  *    parv    a NULL terminated list of parameter pointers,
  73  *
  74  *                    parv[0], sender (prefix string), if not present
  75  *                            this points to an empty string.
  76  *                    parv[1]...parv[parc-1]
  77  *                            pointers to additional parameters
  78  *                    parv[parc] == NULL, *always*
  79  *
  80  *            note:   it is guaranteed that parv[0]..parv[parc-1] are all
  81  *                    non-NULL pointers.
  82  */
  83 #include "config.h"
  84
  85 #include "client.h"
  86 #include "jupe.h"
  87 #include "hash.h"
  88 #include "ircd.h"
  89 #include "ircd_features.h"
  90 #include "ircd_log.h"
  91 #include "ircd_reply.h"
  92 #include "ircd_string.h"
  93 #include "match.h"
  94 #include "msg.h"
  95 #include "numeric.h"
  96 #include "numnicks.h"
  97 #include "s_conf.h"
  98 #include "s_misc.h"
  99 #include "send.h"
 100
 101 /* #include <assert.h> -- Now using assert in ircd_log.h */
 102 #include <stdlib.h>
 103 #include <string.h>
 104
 105 /*
 106  * ms_jupe - server message handler
 107  *
 108  * parv[0] = Send prefix
 109  *
 110  * From server:
 111  *
 112  * parv[1] = Target: server numeric or *
 113  * parv[2] = (+|-)<server name>
 114  * parv[3] = Expiration offset
 115  * parv[4] = Last modification time
 116  * parv[5] = Comment
 117  *
 118  */
 119 int ms_jupe(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 120 {
 121   struct Client *acptr = 0;
 122   struct Jupe *ajupe;
 123   unsigned int flags = 0;
 124   time_t expire_off, lastmod;
 125   char *server = parv[2], *target = parv[1], *reason = parv[5];
 126
 127   if (parc < 6)
 128     return need_more_params(sptr, "JUPE");
 129
 130   if (!(target[0] == '*' && target[1] == '\0')) {
 131     if (!(acptr = FindNServer(target)))
 132       return 0; /* no such server */
 133
 134     if (!IsMe(acptr)) { /* manually propagate, since we don't set it */
 135       sendcmdto_one(sptr, CMD_JUPE, acptr, "%s %s %s %s :%s", target, server,
 136                     parv[3], parv[4], reason);
 137       return 0;
 138     }
 139
 140     flags |= JUPE_LOCAL;
 141   }
 142
 143   if (*server == '-')
 144     server++;
 145   else if (*server == '+') {
 146     flags |= JUPE_ACTIVE;
 147     server++;
 148   }
 149
 150   expire_off = atoi(parv[3]);
 151   lastmod = atoi(parv[4]);
 152
 153   ajupe = jupe_find(server);
 154
 155   if (ajupe) {
 156     if (JupeIsLocal(ajupe) && !(flags & JUPE_LOCAL)) /* global over local */
 157       jupe_free(ajupe);
 158     else if (JupeLastMod(ajupe) < lastmod) { /* new modification */
 159       if (flags & JUPE_ACTIVE)
 160         return jupe_activate(cptr, sptr, ajupe, lastmod, flags);
 161       else
 162         return jupe_deactivate(cptr, sptr, ajupe, lastmod, flags);
 163     } else if (JupeLastMod(ajupe) == lastmod || IsBurstOrBurstAck(cptr))
 164       return 0;
 165     else
 166       return jupe_resend(cptr, ajupe); /* other server desynched WRT jupes */
 167   }
 168
 169   return jupe_add(cptr, sptr, server, reason, expire_off, lastmod, flags);
 170 }
 171
 172 /*
 173  * mo_jupe - oper message handler
 174  *
 175  * parv[0] = Send prefix
 176  * parv[1] = [[+|-]<server name>]
 177  *
 178  * Local (to me) style:
 179  *
 180  * parv[2] = [Expiration offset]
 181  * parv[3] = [Comment]
 182  *
 183  * Global (or remote local) style:
 184  *
 185  * parv[2] = [target]
 186  * parv[3] = [Expiration offset]
 187  * parv[4] = [Comment]
 188  *
 189  */
 190 int mo_jupe(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 191 {
 192   struct Client *acptr = 0;
 193   struct Jupe *ajupe;
 194   unsigned int flags = 0;
 195   time_t expire_off;
 196   char *server = parv[1], *target = 0, *reason;
 197
 198   if (parc < 2)
 199     return jupe_list(sptr, 0);
 200
 201   if (*server == '+') {
 202     flags |= JUPE_ACTIVE;
 203     server++;
 204   } else if (*server == '-')
 205     server++;
 206   else
 207     return jupe_list(sptr, server);
 208
 209   if (!feature_bool(FEAT_CONFIG_OPERCMDS))
 210     return send_reply(sptr, ERR_DISABLED, "JUPE");
 211
 212   if (parc == 4) {
 213     expire_off = atoi(parv[2]);
 214     reason = parv[3];
 215     flags |= JUPE_LOCAL;
 216   } else if (parc > 4) {
 217     target = parv[2];
 218     expire_off = atoi(parv[3]);
 219     reason = parv[4];
 220   } else
 221     return need_more_params(sptr, "JUPE");
 222
 223   if (target) {
 224     if (!(target[0] == '*' && target[1] == '\0')) {
 225       if (!(acptr = find_match_server(target)))
 226         return send_reply(sptr, ERR_NOSUCHSERVER, target);
 227
 228       if (!IsMe(acptr)) { /* manually propagate, since we don't set it */
 229         if (!HasPriv(sptr, PRIV_GLINE))
 230           return send_reply(sptr, ERR_NOPRIVILEGES);
 231
 232         sendcmdto_one(sptr, CMD_JUPE, acptr, "%C %c%s %s %Tu :%s", acptr,
 233                       flags & JUPE_ACTIVE ? '+' : '-', server, parv[3],
 234                       TStime(), reason);
 235         return 0;
 236       } else if (!HasPriv(sptr, PRIV_LOCAL_GLINE))
 237         return send_reply(sptr, ERR_NOPRIVILEGES);
 238
 239       flags |= JUPE_LOCAL;
 240     } else if (!HasPriv(sptr, PRIV_GLINE))
 241       return send_reply(sptr, ERR_NOPRIVILEGES);
 242   }
 243
 244   ajupe = jupe_find(server);
 245
 246   if (ajupe) {
 247     if (JupeIsLocal(ajupe) && !(flags & JUPE_LOCAL)) /* global over local */
 248       jupe_free(ajupe);
 249     else {
 250       if (flags & JUPE_ACTIVE)
 251         return jupe_activate(cptr, sptr, ajupe, TStime(), flags);
 252       else
 253         return jupe_deactivate(cptr, sptr, ajupe, TStime(), flags);
 254     }
 255   }
 256
 257   return jupe_add(cptr, sptr, server, reason, expire_off, TStime(), flags);
 258 }
 259
 260 /*
 261  * m_jupe - user message handler
 262  *
 263  * parv[0] = Send prefix
 264  *
 265  * From user:
 266  *
 267  * parv[1] = [<server name>]
 268  *
 269  */
 270 int m_jupe(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 271 {
 272   if (parc < 2)
 273     return jupe_list(sptr, 0);
 274
 275   return jupe_list(sptr, parv[1]);
 276 }