ircd/m_uping.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/m_uping.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_uping.c,v 1.8 2004/12/11 05:14:03 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 "hash.h"
  86 #include "ircd.h"
  87 #include "ircd_log.h"
  88 #include "ircd_reply.h"
  89 #include "ircd_string.h"
  90 #include "match.h"
  91 #include "msg.h"
  92 #include "numeric.h"
  93 #include "numnicks.h"
  94 #include "s_conf.h"
  95 #include "s_user.h"
  96 #include "send.h"
  97 #include "uping.h"
  98
  99
 100 /* #include <assert.h> -- Now using assert in ircd_log.h */
 101 #include <stdlib.h>
 102 #include <string.h>
 103
 104 /*
 105  * ms_uping - server message handler
 106  *
 107  * m_uping  -- by Run
 108  *
 109  * parv[0] = sender prefix
 110  * parv[1] = pinged server
 111  * parv[2] = port
 112  * parv[3] = hunted server
 113  * parv[4] = number of requested pings
 114  */
 115 int ms_uping(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 116 {
 117   struct ConfItem *aconf;
 118   int port;
 119   int count;
 120
 121   assert(0 != cptr);
 122   assert(0 != sptr);
 123
 124   if (!IsAnOper(sptr)) {
 125     send_reply(sptr, ERR_NOPRIVILEGES);
 126     return 0;
 127   }
 128
 129   if (parc < 5) {
 130     send_reply(sptr, ERR_NEEDMOREPARAMS, "UPING");
 131     return 0;
 132   }
 133
 134   if (hunt_server_cmd(sptr, CMD_UPING, cptr, 1, "%s %s %C %s", 3, parc, parv)
 135       != HUNTED_ISME)
 136     return 0;
 137   /*
 138    * Determine port: First user supplied, then default : 7007
 139    */
 140   if (EmptyString(parv[2]) || (port = atoi(parv[2])) <= 0)
 141     port = atoi(UDP_PORT);
 142
 143   if (EmptyString(parv[4]) || (count = atoi(parv[4])) <= 0)
 144   {
 145     sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING : Illegal number of "
 146                   "packets: %s", sptr, parv[4]);
 147     return 0;
 148   }
 149   /*
 150    * Check if a CONNECT would be possible at all (adapted from m_connect)
 151    */
 152   if ((aconf = conf_find_server(parv[1])))
 153     uping_server(sptr, aconf, port, count);
 154   else
 155     sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Host %s not listed in "
 156                   "ircd.conf", sptr, parv[1]);
 157
 158   return 0;
 159 }
 160
 161 /*
 162  * mo_uping - oper message handler
 163  *
 164  * m_uping  -- by Run
 165  *
 166  * parv[0] = sender prefix
 167  * parv[1] = pinged server
 168  * parv[2] = port
 169  * parv[3] = hunted server
 170  * parv[4] = number of requested pings
 171  */
 172 int mo_uping(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
 173 {
 174   struct ConfItem *aconf;
 175   int port;
 176   int count;
 177
 178   assert(0 != cptr);
 179   assert(0 != sptr);
 180   assert(cptr == sptr);
 181
 182   assert(IsAnOper(sptr));
 183
 184   if (parc < 2) {
 185     send_reply(sptr, ERR_NEEDMOREPARAMS, "UPING");
 186     return 0;
 187   }
 188
 189   if (parc == 2) {
 190     parv[parc++] = UDP_PORT;
 191     parv[parc++] = cli_name(&me);
 192     parv[parc++] = "5";
 193   }
 194   else if (parc == 3) {
 195     if (IsDigit(*parv[2]))
 196       parv[parc++] = cli_name(&me);
 197     else {
 198       parv[parc++] = parv[2];
 199       parv[2] = UDP_PORT;
 200     }
 201     parv[parc++] = "5";
 202   }
 203   else if (parc == 4) {
 204     if (IsDigit(*parv[2])) {
 205       if (IsDigit(*parv[3])) {
 206         parv[parc++] = parv[3];
 207         parv[3] = cli_name(&me);
 208       }
 209       else
 210         parv[parc++] = "5";
 211     }
 212     else {
 213       parv[parc++] = parv[3];
 214       parv[3] = parv[2];
 215       parv[2] = UDP_PORT;
 216     }
 217   }
 218   if (hunt_server_cmd(sptr, CMD_UPING, sptr, 1, "%s %s %C %s", 3, parc, parv)
 219       != HUNTED_ISME)
 220     return 0;
 221   /*
 222    * Determine port: First user supplied, then default : 7007
 223    */
 224   if (EmptyString(parv[2]) || (port = atoi(parv[2])) <= 0)
 225     port = atoi(UDP_PORT);
 226
 227   if (EmptyString(parv[4]) || (count = atoi(parv[4])) <= 0)
 228   {
 229     sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Illegal number of "
 230                   "packets: %s", sptr, parv[4]);
 231     return 0;
 232   }
 233   /*
 234    * Check if a CONNECT would be possible at all (adapted from m_connect)
 235    */
 236   if ((aconf = conf_find_server(parv[1])))
 237     uping_server(sptr, aconf, port, count);
 238   else {
 239     sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Host %s not listed in "
 240                   "ircd.conf", sptr, parv[1]);
 241   }
 242   return 0;
 243 }