ircd/m_oper.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/m_oper.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_oper.c,v 1.25 2005/03/19 22:52:33 entrope 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 "hash.h"
  86 #include "ircd.h"
  87 #include "ircd_alloc.h"
  88 #include "ircd_features.h"
  89 #include "ircd_log.h"
  90 #include "ircd_reply.h"
  91 #include "ircd_string.h"
  92 #include "ircd_crypt.h"
  93 #include "msg.h"
  94 #include "numeric.h"
  95 #include "numnicks.h"
  96 #include "querycmds.h"
  97 #include "s_conf.h"
  98 #include "s_debug.h"
  99 #include "s_user.h"
 100 #include "s_misc.h"
 101 #include "send.h"
 102
 103 /* #include <assert.h> -- Now using assert in ircd_log.h */
 104 #include <stdlib.h>
 105 #include <string.h>
 106
 107 int oper_password_match(const char* to_match, const char* passwd)
 108 {
 109   char *crypted;
 110   int res;
 111   /*
 112    * use first two chars of the password they send in as salt
 113    *
 114    * passwd may be NULL. Head it off at the pass...
 115    */
 116   if (!to_match || !passwd)
 117     return 0;
 118
 119   /* we no longer do a CRYPT_OPER_PASSWORD check because a clear
 120      text passwords just handled by a fallback mechanism called
 121      crypt_clear if it's enabled -- hikari */
 122   crypted = ircd_crypt(to_match, passwd);
 123
 124   if (!crypted)
 125    return 0;
 126   res = strcmp(crypted, passwd);
 127   MyFree(crypted);
 128   return 0 == res;
 129 }
 130
 131 /*
 132  * m_oper - generic message handler
 133  */
 134 int m_oper(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 135 {
 136   struct ConfItem* aconf;
 137   char*            name;
 138   char*            password;
 139
 140   assert(0 != cptr);
 141   assert(cptr == sptr);
 142
 143   name     = parc > 1 ? parv[1] : 0;
 144   password = parc > 2 ? parv[2] : 0;
 145
 146   if (EmptyString(name) || EmptyString(password))
 147     return need_more_params(sptr, "OPER");
 148
 149   aconf = find_conf_exact(name, sptr, CONF_OPERATOR);
 150   if (!aconf || IsIllegal(aconf))
 151   {
 152     send_reply(sptr, ERR_NOOPERHOST);
 153     sendto_opmask_butone(0, SNO_OLDREALOP, "Failed OPER attempt by %s (%s@%s)",
 154                          parv[0], cli_user(sptr)->username, cli_sockhost(sptr));
 155     return 0;
 156   }
 157   assert(0 != (aconf->status & CONF_OPERATOR));
 158
 159   if (oper_password_match(password, aconf->passwd))
 160   {
 161     struct Flags old_mode = cli_flags(sptr);
 162
 163     if (ACR_OK != attach_conf(sptr, aconf)) {
 164       send_reply(sptr, ERR_NOOPERHOST);
 165       sendto_opmask_butone(0, SNO_OLDREALOP, "Failed OPER attempt by %s "
 166                            "(%s@%s)", parv[0], cli_user(sptr)->username,
 167                            cli_sockhost(sptr));
 168       return 0;
 169     }
 170     SetLocOp(sptr);
 171     client_set_privs(sptr, aconf);
 172     if (HasPriv(sptr, PRIV_PROPAGATE))
 173     {
 174       ClearLocOp(sptr);
 175       SetOper(sptr);
 176       ++UserStats.opers;
 177     }
 178     cli_handler(cptr) = OPER_HANDLER;
 179
 180     SetFlag(sptr, FLAG_WALLOP);
 181     SetFlag(sptr, FLAG_SERVNOTICE);
 182     SetFlag(sptr, FLAG_DEBUG);
 183
 184     set_snomask(sptr, SNO_OPERDEFAULT, SNO_ADD);
 185     cli_max_sendq(sptr) = 0; /* Get the sendq from the oper's class */
 186     send_umode_out(cptr, sptr, &old_mode, HasPriv(sptr, PRIV_PROPAGATE));
 187     send_reply(sptr, RPL_YOUREOPER);
 188
 189     sendto_opmask_butone(0, SNO_OLDSNO, "%s (%s@%s) is now operator (%c)",
 190                          parv[0], cli_user(sptr)->username, cli_sockhost(sptr),
 191                          IsOper(sptr) ? 'O' : 'o');
 192
 193     log_write(LS_OPER, L_INFO, 0, "OPER (%s) by (%#C)", name, sptr);
 194   }
 195   else
 196   {
 197     send_reply(sptr, ERR_PASSWDMISMATCH);
 198     sendto_opmask_butone(0, SNO_OLDREALOP, "Failed OPER attempt by %s (%s@%s)",
 199                          parv[0], cli_user(sptr)->username, cli_sockhost(sptr));
 200   }
 201   return 0;
 202 }
 203
 204 /*
 205  * ms_oper - server message handler
 206  */
 207 int ms_oper(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 208 {
 209   assert(0 != cptr);
 210   assert(IsServer(cptr));
 211   /*
 212    * if message arrived from server, trust it, and set to oper
 213    */
 214   if (!IsServer(sptr) && !IsOper(sptr))
 215   {
 216     ++UserStats.opers;
 217     SetFlag(sptr, FLAG_OPER);
 218     sendcmdto_serv_butone(sptr, CMD_MODE, cptr, "%s :+o", parv[0]);
 219   }
 220   return 0;
 221 }
 222
 223 /*
 224  * mo_oper - oper message handler
 225  */
 226 int mo_oper(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 227 {
 228   assert(0 != cptr);
 229   assert(cptr == sptr);
 230   send_reply(sptr, RPL_YOUREOPER);
 231   return 0;
 232 }