Exemplo n.º 1
0
/** Complete non-blocking connect()-sequence. Check access and
 * terminate connection, if trouble detected.
 * @param cptr Client to which we have connected, with all ConfItem structs attached.
 * @return Zero on failure (caller should exit_client()), non-zero on success.
 */
static int completed_connection(struct Client* cptr)
{
  struct ConfItem *aconf;
  time_t newts;
  struct Client *acptr;
  int i;

  assert(0 != cptr);

  /*
   * get the socket status from the fd first to check if
   * connection actually succeeded
   */
  if ((cli_error(cptr) = os_get_sockerr(cli_fd(cptr)))) {
    const char* msg = strerror(cli_error(cptr));
    if (!msg)
      msg = "Unknown error";
    sendto_opmask_butone(0, SNO_OLDSNO, "Connection failed to %s: %s",
                         cli_name(cptr), msg);
    return 0;
  }
  if (!(aconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER))) {
    sendto_opmask_butone(0, SNO_OLDSNO, "Lost Server Line for %s", cli_name(cptr));
    return 0;
  }
  if (s_state(&(cli_socket(cptr))) == SS_CONNECTING)
    socket_state(&(cli_socket(cptr)), SS_CONNECTED);

  if (!EmptyString(aconf->passwd))
    sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);

  /*
   * Create a unique timestamp
   */
  newts = TStime();
  for (i = HighestFd; i > -1; --i) {
    if ((acptr = LocalClientArray[i]) && 
        (IsServer(acptr) || IsHandshake(acptr))) {
      if (cli_serv(acptr)->timestamp >= newts)
        newts = cli_serv(acptr)->timestamp + 1;
    }
  }
  assert(0 != cli_serv(cptr));

  cli_serv(cptr)->timestamp = newts;
  SetHandshake(cptr);
  /*
   * Make us timeout after twice the timeout for DNS look ups
   */
  cli_lasttime(cptr) = CurrentTime;
  ClearPingSent(cptr);

  sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6n :%s",
                cli_name(&me), cli_serv(&me)->timestamp, newts,
		MAJOR_PROTOCOL, NumServCap(&me),
		feature_bool(FEAT_HUB) ? "h" : "", cli_info(&me));

  return (IsDead(cptr)) ? 0 : 1;
}
Exemplo n.º 2
0
/** Handle a connection that has sent a valid PASS and SERVER.
 * @param cptr New peer server.
 * @param aconf Connect block for \a cptr.
 * @return Zero.
 */
int server_estab(struct Client *cptr, struct ConfItem *aconf)
{
  struct Client* acptr = 0;
  const char*    inpath;
  int            i;

  assert(0 != cptr);
  assert(0 != cli_local(cptr));

  inpath = cli_name(cptr);

  if (IsUnknown(cptr)) {
    if (aconf->passwd[0])
      sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);
    /*
     *  Pass my info to the new server
     */
    sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
		  cli_name(&me), cli_serv(&me)->timestamp,
		  cli_serv(cptr)->timestamp, MAJOR_PROTOCOL, NumServCap(&me),
		  feature_bool(FEAT_HUB) ? "h" : "",
		  *(cli_info(&me)) ? cli_info(&me) : "IRCers United");
  }

  det_confs_butmask(cptr, CONF_SERVER);

  if (!IsHandshake(cptr))
    hAddClient(cptr);
  SetServer(cptr);
  cli_handler(cptr) = SERVER_HANDLER;
  Count_unknownbecomesserver(UserStats);
  SetBurst(cptr);

/*    nextping = CurrentTime; */

  /*
   * NOTE: check for acptr->user == cptr->serv->user is necessary to insure
   * that we got the same one... bleah
   */
  if (cli_serv(cptr)->user && *(cli_serv(cptr))->by &&
      (acptr = findNUser(cli_serv(cptr)->by))) {
    if (cli_user(acptr) == cli_serv(cptr)->user) {
      sendcmdto_one(&me, CMD_NOTICE, acptr, "%C :Link with %s established.",
                    acptr, inpath);
    }
    else {
      /*
       * if not the same client, set by to empty string
       */
      acptr = 0;
      *(cli_serv(cptr))->by = '\0';
    }
  }

  sendto_opmask(acptr, SNO_OLDSNO, "Link with %s established.", inpath);
  cli_serv(cptr)->up = &me;
  cli_serv(cptr)->updown = add_dlink(&(cli_serv(&me))->down, cptr);
  sendto_opmask(0, SNO_NETWORK, "Net junction: %s %s", cli_name(&me),
                cli_name(cptr));
  SetJunction(cptr);
  /*
   * Old sendto_serv_but_one() call removed because we now
   * need to send different names to different servers
   * (domain name matching) Send new server to other servers.
   */
  for (i = 0; i <= HighestFd; i++)
  {
    if (!(acptr = LocalClientArray[i]) || !IsServer(acptr) ||
        acptr == cptr || IsMe(acptr))
      continue;
    if (!match(cli_name(&me), cli_name(cptr)))
      continue;
    sendcmdto_one(&me, CMD_SERVER, acptr,
		  "%s 2 0 %Tu J%02u %s%s +%s%s%s :%s", cli_name(cptr),
		  cli_serv(cptr)->timestamp, Protocol(cptr), NumServCap(cptr),
		  IsHub(cptr) ? "h" : "", IsService(cptr) ? "s" : "",
		  IsIPv6(cptr) ? "6" : "", cli_info(cptr));
  }

  /* Send these as early as possible so that glined users/juped servers can
   * be removed from the network while the remote server is still chewing
   * our burst.
   */
  gline_burst(cptr);
  jupe_burst(cptr);

  /*
   * Pass on my client information to the new server
   *
   * First, pass only servers (idea is that if the link gets
   * canceled because the server was already there,
   * there are no NICK's to be canceled...). Of course,
   * if cancellation occurs, all this info is sent anyway,
   * and I guess the link dies when a read is attempted...? --msa
   *
   * Note: Link cancellation to occur at this point means
   * that at least two servers from my fragment are building
   * up connection this other fragment at the same time, it's
   * a race condition, not the normal way of operation...
   */

  for (acptr = &me; acptr; acptr = cli_prev(acptr)) {
    /* acptr->from == acptr for acptr == cptr */
    if (cli_from(acptr) == cptr)
      continue;
    if (IsServer(acptr)) {
      const char* protocol_str;

      if (Protocol(acptr) > 9)
        protocol_str = IsBurst(acptr) ? "J" : "P";
      else
        protocol_str = IsBurst(acptr) ? "J0" : "P0";

      if (0 == match(cli_name(&me), cli_name(acptr)))
        continue;
      sendcmdto_one(cli_serv(acptr)->up, CMD_SERVER, cptr,
		    "%s %d 0 %Tu %s%u %s%s +%s%s%s :%s", cli_name(acptr),
		    cli_hopcount(acptr) + 1, cli_serv(acptr)->timestamp,
		    protocol_str, Protocol(acptr), NumServCap(acptr),
		    IsHub(acptr) ? "h" : "", IsService(acptr) ? "s" : "",
		    IsIPv6(acptr) ? "6" : "", cli_info(acptr));
    }
  }

  for (acptr = &me; acptr; acptr = cli_prev(acptr))
  {
    /* acptr->from == acptr for acptr == cptr */
    if (cli_from(acptr) == cptr)
      continue;
    if (IsUser(acptr))
    {
      char xxx_buf[25];
      char *s = umode_str(acptr);
      sendcmdto_one(cli_user(acptr)->server, CMD_NICK, cptr,
		    "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
		    cli_name(acptr), cli_hopcount(acptr) + 1, cli_lastnick(acptr),
		    cli_user(acptr)->username, cli_user(acptr)->realhost,
		    *s ? "+" : "", s, *s ? " " : "",
		    iptobase64(xxx_buf, &cli_ip(acptr), sizeof(xxx_buf), IsIPv6(cptr)),
		    NumNick(acptr), cli_info(acptr));
    }
  }
  /*
   * Last, send the BURST.
   * (Or for 2.9 servers: pass all channels plus statuses)
   */
  {
    struct Channel *chptr;
    for (chptr = GlobalChannelList; chptr; chptr = chptr->next)
      send_channel_modes(cptr, chptr);
  }
  sendcmdto_one(&me, CMD_END_OF_BURST, cptr, "");
  return 0;
}
Exemplo n.º 3
0
/**
 * Exits a client of *any* type (user, server, etc)
 * from this server. Also, this generates all necessary prototol
 * messages that this exit may cause.
 *
 * This function implicitly exits all other clients depending on
 * this connection.
 *
 * For convenience, this function returns a suitable value for
 * m_function return value:
 *
 *   CPTR_KILLED     if (cptr == bcptr)
 *   0                if (cptr != bcptr)
 *
 * This function can be called in two ways:
 * 1) From before or in parse(), exiting the 'cptr', in which case it was
 *    invoked as exit_client(cptr, cptr, &me,...), causing it to always
 *    return CPTR_KILLED.
 * 2) Via parse from a m_function call, in which case it was invoked as
 *    exit_client(cptr, acptr, sptr, ...). Here 'sptr' is known; the client
 *    that generated the message in a way that we can assume he already
 *    did remove acptr from memory himself (or in other cases we don't mind
 *    because he will be delinked.) Or invoked as:
 *    exit_client(cptr, acptr/sptr, &me, ...) when WE decide this one should
 *    be removed.
 * In general: No generated SQUIT or QUIT should be sent to source link
 * sptr->from. And CPTR_KILLED should be returned if cptr got removed (too).
 *
 * --Run
 * @param cptr Connection currently being handled by read_message.
 * @param victim Client being killed.
 * @param killer Client that made the decision to remove \a victim.
 * @param comment Reason for the exit.
 * @return CPTR_KILLED if cptr == bcptr, else 0.
 */
int exit_client(struct Client *cptr,
    struct Client* victim,
    struct Client* killer,
    const char* comment)
{
  struct Client* acptr = 0;
  struct DLink *dlp;
  time_t on_for;

  char comment1[HOSTLEN + HOSTLEN + 2];
  assert(killer);
  if (MyConnect(victim))
  {
    SetFlag(victim, FLAG_CLOSING);

    if (feature_bool(FEAT_CONNEXIT_NOTICES) && IsUser(victim))
      sendto_opmask_butone(0, SNO_CONNEXIT,
                           "Client exiting: %s (%s@%s) [%s] [%s] <%s%s>",
                           cli_name(victim), cli_user(victim)->username,
                           cli_user(victim)->host, comment,
                           ircd_ntoa(&cli_ip(victim)),
                           NumNick(victim) /* two %s's */);
    update_load();

    on_for = CurrentTime - cli_firsttime(victim);

    if (IsUser(victim) || IsUserPort(victim))
      auth_send_exit(victim);

    if (IsUser(victim))
      log_write(LS_USER, L_TRACE, 0, "%Tu %i %s@%s %s %s %s%s %s :%s",
		cli_firsttime(victim), on_for,
		cli_user(victim)->username, cli_sockhost(victim),
                ircd_ntoa(&cli_ip(victim)),
                IsAccount(victim) ? cli_username(victim) : "0",
                NumNick(victim), /* two %s's */
                cli_name(victim), cli_info(victim));

    if (victim != cli_from(killer)  /* The source knows already */
        && IsClient(victim))    /* Not a Ping struct or Log file */
    {
      if (IsServer(victim) || IsHandshake(victim))
	sendcmdto_one(killer, CMD_SQUIT, victim, "%s 0 :%s", cli_name(&me), comment);
      else if (!IsConnecting(victim)) {
        if (!IsDead(victim)) {
	  if (IsServer(victim))
	    sendcmdto_one(killer, CMD_ERROR, victim,
			  ":Closing Link: %s by %s (%s)", cli_name(victim),
			  cli_name(killer), comment);
	  else
	    sendrawto_one(victim, MSG_ERROR " :Closing Link: %s by %s (%s)",
			  cli_name(victim),
                          cli_name(IsServer(killer) ? &his : killer),
			  comment);
	}
      }
      if ((IsServer(victim) || IsHandshake(victim) || IsConnecting(victim)) &&
          (killer == &me || (IsServer(killer) &&
          (strncmp(comment, "Leaf-only link", 14) ||
          strncmp(comment, "Non-Hub link", 12)))))
      {
        /*
         * Note: check user == user needed to make sure we have the same
         * client
         */
        if (cli_serv(victim)->user && *(cli_serv(victim))->by &&
            (acptr = findNUser(cli_serv(victim)->by))) {
          if (cli_user(acptr) == cli_serv(victim)->user) {
	    sendcmdto_one(&me, CMD_NOTICE, acptr,
			  "%C :Link with %s canceled: %s", acptr,
			  cli_name(victim), comment);
          }
          else {
            /*
             * not right client, set by to empty string
             */
            acptr = 0;
            *(cli_serv(victim))->by = '\0';
          }
        }
        if (killer == &me)
	  sendto_opmask_butone(acptr, SNO_OLDSNO, "Link with %s canceled: %s",
			       cli_name(victim), comment);
      }
    }
    /*
     *  Close the Client connection first.
     */
    close_connection(victim);
  }

  if (IsServer(victim))
  {
    if (feature_bool(FEAT_HIS_NETSPLIT))
      strcpy(comment1, "*.net *.split");
    else
    {
      strcpy(comment1, cli_name(cli_serv(victim)->up));
      strcat(comment1, " ");
      strcat(comment1, cli_name(victim));
    }

    if (IsUser(killer))
      sendto_opmask_butone(killer, SNO_OLDSNO, "%s SQUIT by %s [%s]:",
			   (cli_user(killer)->server == victim ||
			    cli_user(killer)->server == cli_serv(victim)->up) ?
			   "Local" : "Remote",
			   get_client_name(killer, HIDE_IP),
			   cli_name(cli_user(killer)->server));
    else if (killer != &me && cli_serv(victim)->up != killer)
      sendto_opmask_butone(0, SNO_OLDSNO, "Received SQUIT %s from %s :",
			   cli_name(victim), IsServer(killer) ? cli_name(killer) :
			   get_client_name(killer, HIDE_IP));
    sendto_opmask_butone(0, SNO_NETWORK, "Net break: %C %C (%s)",
			 cli_serv(victim)->up, victim, comment);
  }

  /*
   * First generate the needed protocol for the other server links
   * except the source:
   */
  for (dlp = cli_serv(&me)->down; dlp; dlp = dlp->next) {
    if (dlp->value.cptr != cli_from(killer) && dlp->value.cptr != victim)
    {
      if (IsServer(victim))
	sendcmdto_one(killer, CMD_SQUIT, dlp->value.cptr, "%s %Tu :%s",
		      cli_name(victim), cli_serv(victim)->timestamp, comment);
      else if (IsUser(victim) && !HasFlag(victim, FLAG_KILLED))
	sendcmdto_one(victim, CMD_QUIT, dlp->value.cptr, ":%s", comment);
    }
  }
  /* Then remove the client structures */
  if (IsServer(victim))
    exit_downlinks(victim, killer, comment1);
  exit_one_client(victim, comment);

  /*
   *  cptr can only have been killed if it was cptr itself that got killed here,
   *  because cptr can never have been a dependent of victim    --Run
   */
  return (cptr == victim) ? CPTR_KILLED : 0;
}
Exemplo n.º 4
0
/** Check for clients that have not sent a ping response recently.
 * Reschedules itself to run again at the appropriate time.
 * @param[in] ev Timer event (ignored).
 */
static void check_pings(struct Event* ev) {
  int expire     = 0;
  int next_check = CurrentTime;
  int max_ping   = 0;
  int i;

  assert(ET_EXPIRE == ev_type(ev));
  assert(0 != ev_timer(ev));

  next_check += feature_int(FEAT_PINGFREQUENCY);
  
  /* Scan through the client table */
  for (i=0; i <= HighestFd; i++) {
    struct Client *cptr = LocalClientArray[i];
   
    if (!cptr)
      continue;
     
    assert(&me != cptr);  /* I should never be in the local client array! */
   

    /* Remove dead clients. */
    if (IsDead(cptr)) {
      exit_client(cptr, cptr, &me, cli_info(cptr));
      continue;
    }

    max_ping = IsRegistered(cptr) ? client_get_ping(cptr) :
      feature_int(FEAT_CONNECTTIMEOUT);
   
    Debug((DEBUG_DEBUG, "check_pings(%s)=status:%s limit: %d current: %d",
	   cli_name(cptr),
	   IsPingSent(cptr) ? "[Ping Sent]" : "[]", 
	   max_ping, (int)(CurrentTime - cli_lasttime(cptr))));

    /* If it's a server and we have not sent an AsLL lately, do so. */
    if (IsServer(cptr)) {
      if (CurrentTime - cli_serv(cptr)->asll_last >= max_ping) {
        char *asll_ts;

        SetPingSent(cptr);
        cli_serv(cptr)->asll_last = CurrentTime;
        expire = cli_serv(cptr)->asll_last + max_ping;
        asll_ts = militime_float(NULL);
        sendcmdto_prio_one(&me, CMD_PING, cptr, "!%s %s %s", asll_ts,
                           cli_name(cptr), asll_ts);
      }

      expire = cli_serv(cptr)->asll_last + max_ping;
      if (expire < next_check)
        next_check = expire;
    }

    /* Ok, the thing that will happen most frequently, is that someone will
     * have sent something recently.  Cover this first for speed.
     * -- 
     * If it's an unregistered client and hasn't managed to register within
     * max_ping then it's obviously having problems (broken client) or it's
     * just up to no good, so we won't skip it, even if its been sending
     * data to us. 
     * -- hikari
     */
    if ((CurrentTime-cli_lasttime(cptr) < max_ping) && IsRegistered(cptr)) {
      expire = cli_lasttime(cptr) + max_ping;
      if (expire < next_check) 
	next_check = expire;
      continue;
    }

    /* Unregistered clients pingout after max_ping seconds, they don't
     * get given a second chance - if they were then people could not quite
     * finish registration and hold resources without being subject to k/g
     * lines
     */
    if (!IsRegistered(cptr)) {
      assert(!IsServer(cptr));
      /* If client authorization time has expired, ask auth whether they
       * should be checked again later. */
      if ((CurrentTime-cli_firsttime(cptr) >= max_ping)
          && auth_ping_timeout(cptr))
        continue;
      /* OK, they still have enough time left, so we'll just skip to the
       * next client.  Set the next check to be when their time is up, if
       * that's before the currently scheduled next check -- hikari */
      expire = cli_firsttime(cptr) + max_ping;
      if (expire < next_check)
        next_check = expire;
      continue;
    }

    /* Quit the client after max_ping*2 - they should have answered by now */
    if (CurrentTime-cli_lasttime(cptr) >= (max_ping*2) )
    {
      /* If it was a server, then tell ops about it. */
      if (IsServer(cptr) || IsConnecting(cptr) || IsHandshake(cptr))
        sendto_opmask_butone(0, SNO_OLDSNO,
                             "No response from %s, closing link",
                             cli_name(cptr));
      exit_client_msg(cptr, cptr, &me, "Ping timeout");
      continue;
    }
    
    if (!IsPingSent(cptr))
    {
      /* If we haven't PINGed the connection and we haven't heard from it in a
       * while, PING it to make sure it is still alive.
       */
      SetPingSent(cptr);

      /* If we're late in noticing don't hold it against them :) */
      cli_lasttime(cptr) = CurrentTime - max_ping;
      
      if (IsUser(cptr))
        sendrawto_one(cptr, MSG_PING " :%s", cli_name(&me));
      else
        sendcmdto_prio_one(&me, CMD_PING, cptr, ":%s", cli_name(&me));
    }
    
    expire = cli_lasttime(cptr) + max_ping * 2;
    if (expire < next_check)
      next_check=expire;
  }
  
  assert(next_check >= CurrentTime);
  
  Debug((DEBUG_DEBUG, "[%i] check_pings() again in %is",
	 CurrentTime, next_check-CurrentTime));
  
  timer_add(&ping_timer, check_pings, 0, TT_ABSOLUTE, next_check);
}
Exemplo n.º 5
0
/** Attempt to send a sequence of bytes to the connection.
 * As a side effect, updates \a cptr's FLAG_BLOCKED setting
 * and sendB/sendK fields.
 * @param cptr Client that should receive data.
 * @param buf Message buffer to send to client.
 * @return Negative on connection-fatal error; otherwise
 *  number of bytes sent.
 */
unsigned int deliver_it(struct Client *cptr, struct MsgQ *buf)
{
  unsigned int bytes_written = 0;
  unsigned int bytes_count = 0;
  assert(0 != cptr);

#if defined(USE_SSL)
  switch (client_sendv(cptr, buf, &bytes_count, &bytes_written)) {
#else
  switch (os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written)) {
#endif
  case IO_SUCCESS:
    ClrFlag(cptr, FLAG_BLOCKED);

    cli_sendB(cptr) += bytes_written;
    cli_sendB(&me)  += bytes_written;
    /* A partial write implies that future writes will block. */
    if (bytes_written < bytes_count)
      SetFlag(cptr, FLAG_BLOCKED);
    break;
  case IO_BLOCKED:
    SetFlag(cptr, FLAG_BLOCKED);
    break;
  case IO_FAILURE:
    cli_error(cptr) = errno;
    SetFlag(cptr, FLAG_DEADSOCKET);
    break;
  }
  return bytes_written;
}

/** Complete non-blocking connect()-sequence. Check access and
 * terminate connection, if trouble detected.
 * @param cptr Client to which we have connected, with all ConfItem structs attached.
 * @return Zero on failure (caller should exit_client()), non-zero on success.
 */
static int completed_connection(struct Client* cptr)
{
  struct ConfItem *aconf;
  time_t newts;
  struct Client *acptr;
  int i;
#if defined(USE_SSL)
  char *sslfp;
  int r;
#endif

  assert(0 != cptr);

  /*
   * get the socket status from the fd first to check if
   * connection actually succeeded
   */
  if ((cli_error(cptr) = os_get_sockerr(cli_fd(cptr)))) {
    const char* msg = strerror(cli_error(cptr));
    if (!msg)
      msg = "Unknown error";
    sendto_opmask(0, SNO_OLDSNO, "Connection failed to %s: %s",
                  cli_name(cptr), msg);
    return 0;
  }
  if (!(aconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER))) {
    sendto_opmask(0, SNO_OLDSNO, "Lost Server Line for %s", cli_name(cptr));
    return 0;
  }

#if defined(USE_SSL)
  if (aconf->flags & CONF_SSL) {
    r = ssl_connect(&(cli_socket(cptr)));
    if (r == -1) {
      sendto_opmask(0, SNO_OLDSNO, "Connection failed to %s: SSL error",
                    cli_name(cptr));
      return 0;
    } else if (r == 0)
      return 1;
    sslfp = ssl_get_fingerprint(cli_socket(cptr).s_ssl);
    if (sslfp)
      ircd_strncpy(cli_sslclifp(cptr), sslfp, BUFSIZE+1);
    SetSSL(cptr);
  }
#endif

  if (s_state(&(cli_socket(cptr))) == SS_CONNECTING)
    socket_state(&(cli_socket(cptr)), SS_CONNECTED);

  if (!EmptyString(aconf->passwd))
    sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);

  /*
   * Create a unique timestamp
   */
  newts = TStime();
  for (i = HighestFd; i > -1; --i) {
    if ((acptr = LocalClientArray[i]) &&
        (IsServer(acptr) || IsHandshake(acptr))) {
      if (cli_serv(acptr)->timestamp >= newts)
        newts = cli_serv(acptr)->timestamp + 1;
    }
  }
  assert(0 != cli_serv(cptr));

  cli_serv(cptr)->timestamp = newts;
  SetHandshake(cptr);
  /*
   * Make us timeout after twice the timeout for DNS look ups
   */
  cli_lasttime(cptr) = CurrentTime;
  ClearPingSent(cptr);

/* TODO: NEGOCIACION
  envia_config_req(cptr);
*/

  sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
                cli_name(&me), cli_serv(&me)->timestamp, newts,
		MAJOR_PROTOCOL, NumServCap(&me),
		feature_bool(FEAT_HUB) ? "h" : "", cli_info(&me));

#if defined(DDB)
  ddb_burst(cptr);
#endif

  return (IsDead(cptr)) ? 0 : 1;
}

/** Close the physical connection.  Side effects: MyConnect(cptr)
 * becomes false and cptr->from becomes NULL.
 * @param cptr Client to disconnect.
 */
void close_connection(struct Client *cptr)
{
  struct ConfItem* aconf;

  if (IsServer(cptr)) {
    ServerStats->is_sv++;
    ServerStats->is_sbs += cli_sendB(cptr);
    ServerStats->is_sbr += cli_receiveB(cptr);
    ServerStats->is_sti += CurrentTime - cli_firsttime(cptr);
    /*
     * If the connection has been up for a long amount of time, schedule
     * a 'quick' reconnect, else reset the next-connect cycle.
     */
    if ((aconf = find_conf_exact(cli_name(cptr), cptr, CONF_SERVER))) {
      /*
       * Reschedule a faster reconnect, if this was a automatically
       * connected configuration entry. (Note that if we have had
       * a rehash in between, the status has been changed to
       * CONF_ILLEGAL). But only do this if it was a "good" link.
       */
      aconf->hold = CurrentTime;
      aconf->hold += ((aconf->hold - cli_since(cptr) >
		       feature_int(FEAT_HANGONGOODLINK)) ?
		      feature_int(FEAT_HANGONRETRYDELAY) : ConfConFreq(aconf));
/*        if (nextconnect > aconf->hold) */
/*          nextconnect = aconf->hold; */
    }
  }
  else if (IsUser(cptr)) {
    ServerStats->is_cl++;
    ServerStats->is_cbs += cli_sendB(cptr);
    ServerStats->is_cbr += cli_receiveB(cptr);
    ServerStats->is_cti += CurrentTime - cli_firsttime(cptr);
  }
  else
    ServerStats->is_ni++;

#if defined(USE_ZLIB)
  /*
   * Siempre es una conexion nuestra
   */
  if (cli_connect(cptr)->zlib_negociation & ZLIB_IN) {
    inflateEnd(cli_connect(cptr)->comp_in);
    MyFree(cli_connect(cptr)->comp_in);
  }
  if (cli_connect(cptr)->zlib_negociation & ZLIB_OUT) {
    deflateEnd(cli_connect(cptr)->comp_out);
    MyFree(cli_connect(cptr)->comp_out);
  }
#endif

  if (-1 < cli_fd(cptr)) {
    flush_connections(cptr);
    LocalClientArray[cli_fd(cptr)] = 0;
    close(cli_fd(cptr));
    socket_del(&(cli_socket(cptr))); /* queue a socket delete */
    cli_fd(cptr) = -1;
    cli_freeflag(cptr) &= ~FREEFLAG_SOCKET;
  }
  SetFlag(cptr, FLAG_DEADSOCKET);

  MsgQClear(&(cli_sendQ(cptr)));
  client_drop_sendq(cli_connect(cptr));
  DBufClear(&(cli_recvQ(cptr)));
  memset(cli_passwd(cptr), 0, sizeof(cli_passwd(cptr)));
  set_snomask(cptr, 0, SNO_SET);

  det_confs_butmask(cptr, 0);

  if (cli_listener(cptr)) {
    release_listener(cli_listener(cptr));
    cli_listener(cptr) = 0;
  }

  for ( ; HighestFd > 0; --HighestFd) {
    if (LocalClientArray[HighestFd])
      break;
  }
}

/** Close all unregistered connections.
 * @param source Oper who requested the close.
 * @return Number of closed connections.
 */
int net_close_unregistered_connections(struct Client* source)
{
  int            i;
  struct Client* cptr;
  int            count = 0;
  assert(0 != source);

  for (i = HighestFd; i > 0; --i) {
    if ((cptr = LocalClientArray[i]) && !IsRegistered(cptr)) {
      send_reply(source, RPL_CLOSING, get_client_name(source, HIDE_IP));
      exit_client(source, cptr, &me, "Oper Closing");
      ++count;
    }
  }
  return count;
}