ircd/m_opmode.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/m_opmode.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_opmode.c,v 1.18 2005/09/13 15:17:46 entrope 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 "channel.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 "msg.h"
  94 #include "numeric.h"
  95 #include "numnicks.h"
  96 #include "send.h"
  97 #include "s_conf.h"
  98
  99 /* #include <assert.h> -- Now using assert in ircd_log.h */
 100
 101 /*
 102  * ms_opmode - server message handler
 103  */
 104 int ms_opmode(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 105 {
 106   struct Channel *chptr = 0;
 107   struct ModeBuf mbuf;
 108
 109   if (parc < 3)
 110     return need_more_params(sptr, "OPMODE");
 111
 112   if (IsLocalChannel(parv[1]))
 113     return 0;
 114
 115   if ('#' != *parv[1] || !(chptr = FindChannel(parv[1])))
 116     return send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
 117
 118   modebuf_init(&mbuf, sptr, cptr, chptr,
 119                (MODEBUF_DEST_CHANNEL | /* Send MODE to channel */
 120                 MODEBUF_DEST_SERVER  | /* And to server */
 121                 MODEBUF_DEST_OPMODE  | /* Use OPMODE */
 122                 MODEBUF_DEST_HACK4   | /* Generate a HACK(4) notice */
 123                 MODEBUF_DEST_LOG));    /* Log the mode changes to OPATH */
 124
 125   mode_parse(&mbuf, cptr, sptr, chptr, parc - 2, parv + 2,
 126              (MODE_PARSE_SET    | /* Set the modes on the channel */
 127               MODE_PARSE_STRICT | /* Be strict about it */
 128               MODE_PARSE_FORCE),  /* And force them to be accepted */
 129               NULL);
 130
 131   modebuf_flush(&mbuf); /* flush the modes */
 132
 133   return 0;
 134 }
 135
 136 /*
 137  * mo_opmode - oper message handler
 138  */
 139 int mo_opmode(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 140 {
 141   struct Channel *chptr = 0;
 142   struct ModeBuf mbuf;
 143   char *chname;
 144   const char *qreason;
 145   int force = 0;
 146
 147   if (!feature_bool(FEAT_CONFIG_OPERCMDS))
 148     return send_reply(sptr, ERR_DISABLED, "OPMODE");
 149
 150   if (parc < 3)
 151     return need_more_params(sptr, "OPMODE");
 152
 153   chname = parv[1];
 154   if (*chname == '!')
 155   {
 156     chname++;
 157     if (!HasPriv(sptr, IsLocalChannel(chname) ? PRIV_FORCE_LOCAL_OPMODE
 158                                               : PRIV_FORCE_OPMODE))
 159       return send_reply(sptr, ERR_NOPRIVILEGES);
 160     force = 1;
 161   }
 162
 163   if (!HasPriv(sptr,
 164                IsLocalChannel(chname) ? PRIV_LOCAL_OPMODE : PRIV_OPMODE))
 165     return send_reply(sptr, ERR_NOPRIVILEGES);
 166
 167   if (!IsChannelName(chname) || !(chptr = FindChannel(chname)))
 168     return send_reply(sptr, ERR_NOSUCHCHANNEL, chname);
 169
 170   if (!force && (qreason = find_quarantine(chptr->chname)))
 171     return send_reply(sptr, ERR_QUARANTINED, chptr->chname, qreason);
 172
 173   modebuf_init(&mbuf, sptr, cptr, chptr,
 174                (MODEBUF_DEST_CHANNEL | /* Send MODE to channel */
 175                 MODEBUF_DEST_SERVER  | /* And to server */
 176                 MODEBUF_DEST_OPMODE  | /* Use OPMODE */
 177                 MODEBUF_DEST_HACK4   | /* Generate a HACK(4) notice */
 178                 MODEBUF_DEST_LOG));    /* Log the mode changes to OPATH */
 179
 180   mode_parse(&mbuf, cptr, sptr, chptr, parc - 2, parv + 2,
 181              (MODE_PARSE_SET |    /* set the modes on the channel */
 182               MODE_PARSE_FORCE),  /* And force them to be accepted */
 183               NULL);
 184
 185   modebuf_flush(&mbuf); /* flush the modes */
 186
 187   return 0;
 188 }
 189