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   int             chancount;
 110   char*           vector[MAXTARGETS];
 111
 112   assert(0 != cptr);
 113   assert(cptr == sptr);
 114   assert(0 != cli_user(sptr));
 115
 116   ClrFlag(sptr, FLAG_TS8);
 117
 118   if (feature_bool(FEAT_IDLE_FROM_MSG))
 119     cli_user(sptr)->last = CurrentTime;
 120
 121   if (parc < 2 || EmptyString(parv[1]))
 122     return send_reply(sptr, ERR_NORECIPIENT, MSG_PRIVATE);
 123
 124   if (parc < 3 || EmptyString(parv[parc - 1]))
 125     return send_reply(sptr, ERR_NOTEXTTOSEND);
 126
 127   count = unique_name_vector(parv[1], ',', vector, MAXTARGETS);
 128
 129   chancount = 0;
 130   for (i = 0; i < count; ++i) {
 131     name = vector[i];
 132
 133     if (IsChannelPrefix(*name))
 134       chancount++;
 135   }
 136
 137   for (i = 0; i < count; ++i) {
 138     name = vector[i];
 139     /*
 140      * channel msg?
 141      */
 142     if (IsChannelPrefix(*name)) {
 143       relay_channel_message(sptr, name, parv[parc - 1], chancount);
 144     }
 145     /*
 146      * we have to check for the '@' at least once no matter what we do
 147      * handle it first so we don't have to do it twice
 148      */
 149     else if ((server = strchr(name, '@')))
 150       relay_directed_message(sptr, name, server, parv[parc - 1]);
 151     else
 152       relay_private_message(sptr, name, parv[parc - 1]);
 153   }
 154   return 0;
 155 }
 156
 157 /*
 158  * ms_privmsg - server message handler
 159  */
 160 int ms_privmsg(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 161 {
 162   char* name;
 163   char* server;
 164
 165   ClrFlag(sptr, FLAG_TS8);
 166
 167   if (parc < 3) {
 168     /*
 169      * we can't deliver it, sending an error back is pointless
 170      */
 171     return 0;
 172   }
 173   name = parv[1];
 174   /*
 175    * channel msg?
 176    */
 177   if (IsChannelPrefix(*name)) {
 178     server_relay_channel_message(sptr, name, parv[parc - 1]);
 179   }
 180   /*
 181    * coming from another server, we have to check this here
 182    */
 183   else if ('$' == *name && IsOper(sptr)) {
 184     server_relay_masked_message(sptr, name, parv[parc - 1]);
 185   }
 186   else if ((server = strchr(name, '@'))) {
 187     /*
 188      * XXX - can't get away with not doing everything
 189      * relay_directed_message has to do
 190      */
 191     relay_directed_message(sptr, name, server, parv[parc - 1]);
 192   }
 193   else {
 194     server_relay_private_message(sptr, name, parv[parc - 1]);
 195   }
 196   return 0;
 197 }
 198
 199
 200 /*
 201  * mo_privmsg - oper message handler
 202  */
 203 int mo_privmsg(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 204 {
 205   char*           name;
 206   char*           server;
 207   int             i;
 208   int             count;
 209   int             chancount;
 210   char*           vector[MAXTARGETS];
 211   assert(0 != cptr);
 212   assert(cptr == sptr);
 213   assert(0 != cli_user(sptr));
 214
 215   ClrFlag(sptr, FLAG_TS8);
 216
 217   if (feature_bool(FEAT_IDLE_FROM_MSG))
 218     cli_user(sptr)->last = CurrentTime;
 219
 220   if (parc < 2 || EmptyString(parv[1]))
 221     return send_reply(sptr, ERR_NORECIPIENT, MSG_PRIVATE);
 222
 223   if (parc < 3 || EmptyString(parv[parc - 1]))
 224     return send_reply(sptr, ERR_NOTEXTTOSEND);
 225
 226   count = unique_name_vector(parv[1], ',', vector, MAXTARGETS);
 227
 228   chancount = 0;
 229   for (i = 0; i < count; ++i) {
 230     name = vector[i];
 231
 232     if (IsChannelPrefix(*name))
 233       chancount++;
 234   }
 235
 236   for (i = 0; i < count; ++i) {
 237     name = vector[i];
 238     /*
 239      * channel msg?
 240      */
 241     if (IsChannelPrefix(*name))
 242       relay_channel_message(sptr, name, parv[parc - 1], chancount);
 243
 244     else if (*name == '$')
 245       relay_masked_message(sptr, name, parv[parc - 1]);
 246
 247     else if ((server = strchr(name, '@')))
 248       relay_directed_message(sptr, name, server, parv[parc - 1]);
 249
 250     else
 251       relay_private_message(sptr, name, parv[parc - 1]);
 252   }
 253   return 0;
 254 }