ircd/m_privmsg.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/m_privmsg.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_privmsg.c,v 1.11 2004/12/11 05:13:48 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 "ircd.h"
  86 #include "ircd_chattr.h"
  87 #include "ircd_features.h"
  88 #include "ircd_log.h"
  89 #include "ircd_relay.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 "send.h"
  96
  97 /* #include <assert.h> -- Now using assert in ircd_log.h */
  98 #include <string.h>
  99
 100 /*
 101  * m_privmsg - generic message handler
 102  */
 103 int m_privmsg(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 104 {
 105   char*           name;
 106   char*           server;
 107   int             i;
 108   int             count;
 109   char*           vector[MAXTARGETS];
 110
 111   assert(0 != cptr);
 112   assert(cptr == sptr);
 113   assert(0 != cli_user(sptr));
 114
 115   ClrFlag(sptr, FLAG_TS8);
 116
 117   if (feature_bool(FEAT_IDLE_FROM_MSG))
 118     cli_user(sptr)->last = CurrentTime;
 119
 120   if (parc < 2 || EmptyString(parv[1]))
 121     return send_reply(sptr, ERR_NORECIPIENT, MSG_PRIVATE);
 122
 123   if (parc < 3 || EmptyString(parv[parc - 1]))
 124     return send_reply(sptr, ERR_NOTEXTTOSEND);
 125
 126   count = unique_name_vector(parv[1], ',', vector, MAXTARGETS);
 127
 128   for (i = 0; i < count; ++i) {
 129     name = vector[i];
 130     /*
 131      * channel msg?
 132      */
 133     if (IsChannelPrefix(*name)) {
 134       relay_channel_message(sptr, name, parv[parc - 1]);
 135     }
 136     /*
 137      * we have to check for the '@' at least once no matter what we do
 138      * handle it first so we don't have to do it twice
 139      */
 140     else if ((server = strchr(name, '@')))
 141       relay_directed_message(sptr, name, server, parv[parc - 1]);
 142     else
 143       relay_private_message(sptr, name, parv[parc - 1]);
 144   }
 145   return 0;
 146 }
 147
 148 /*
 149  * ms_privmsg - server message handler
 150  */
 151 int ms_privmsg(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 152 {
 153   char* name;
 154   char* server;
 155
 156   ClrFlag(sptr, FLAG_TS8);
 157
 158   if (parc < 3) {
 159     /*
 160      * we can't deliver it, sending an error back is pointless
 161      */
 162     return 0;
 163   }
 164   name = parv[1];
 165   /*
 166    * channel msg?
 167    */
 168   if (IsChannelPrefix(*name)) {
 169     server_relay_channel_message(sptr, name, parv[parc - 1]);
 170   }
 171   /*
 172    * coming from another server, we have to check this here
 173    */
 174   else if ('$' == *name && IsOper(sptr)) {
 175     server_relay_masked_message(sptr, name, parv[parc - 1]);
 176   }
 177   else if ((server = strchr(name, '@'))) {
 178     /*
 179      * XXX - can't get away with not doing everything
 180      * relay_directed_message has to do
 181      */
 182     relay_directed_message(sptr, name, server, parv[parc - 1]);
 183   }
 184   else {
 185     server_relay_private_message(sptr, name, parv[parc - 1]);
 186   }
 187   return 0;
 188 }
 189
 190
 191 /*
 192  * mo_privmsg - oper message handler
 193  */
 194 int mo_privmsg(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 195 {
 196   char*           name;
 197   char*           server;
 198   int             i;
 199   int             count;
 200   char*           vector[MAXTARGETS];
 201   assert(0 != cptr);
 202   assert(cptr == sptr);
 203   assert(0 != cli_user(sptr));
 204
 205   ClrFlag(sptr, FLAG_TS8);
 206
 207   if (feature_bool(FEAT_IDLE_FROM_MSG))
 208     cli_user(sptr)->last = CurrentTime;
 209
 210   if (parc < 2 || EmptyString(parv[1]))
 211     return send_reply(sptr, ERR_NORECIPIENT, MSG_PRIVATE);
 212
 213   if (parc < 3 || EmptyString(parv[parc - 1]))
 214     return send_reply(sptr, ERR_NOTEXTTOSEND);
 215
 216   count = unique_name_vector(parv[1], ',', vector, MAXTARGETS);
 217
 218   for (i = 0; i < count; ++i) {
 219     name = vector[i];
 220     /*
 221      * channel msg?
 222      */
 223     if (IsChannelPrefix(*name))
 224       relay_channel_message(sptr, name, parv[parc - 1]);
 225
 226     else if (*name == '$')
 227       relay_masked_message(sptr, name, parv[parc - 1]);
 228
 229     else if ((server = strchr(name, '@')))
 230       relay_directed_message(sptr, name, server, parv[parc - 1]);
 231
 232     else
 233       relay_private_message(sptr, name, parv[parc - 1]);
 234   }
 235   return 0;
 236 }