265 lines
8.5 KiB
C
265 lines
8.5 KiB
C
/*
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* IRC - Internet Relay Chat, ircd/m_settime.c
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* Copyright (C) 1990 Jarkko Oikarinen and
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* University of Oulu, Computing Center
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*
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* See file AUTHORS in IRC package for additional names of
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* the programmers.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 1, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id: m_settime.c 1271 2004-12-11 05:14:07Z klmitch $
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*/
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/*
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* m_functions execute protocol messages on this server:
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*
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* cptr is always NON-NULL, pointing to a *LOCAL* client
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* structure (with an open socket connected!). This
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* identifies the physical socket where the message
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* originated (or which caused the m_function to be
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* executed--some m_functions may call others...).
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*
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* sptr is the source of the message, defined by the
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* prefix part of the message if present. If not
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* or prefix not found, then sptr==cptr.
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*
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* (!IsServer(cptr)) => (cptr == sptr), because
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* prefixes are taken *only* from servers...
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*
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* (IsServer(cptr))
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* (sptr == cptr) => the message didn't
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* have the prefix.
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*
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* (sptr != cptr && IsServer(sptr) means
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* the prefix specified servername. (?)
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*
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* (sptr != cptr && !IsServer(sptr) means
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* that message originated from a remote
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* user (not local).
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*
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* combining
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*
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* (!IsServer(sptr)) means that, sptr can safely
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* taken as defining the target structure of the
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* message in this server.
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*
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* *Always* true (if 'parse' and others are working correct):
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*
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* 1) sptr->from == cptr (note: cptr->from == cptr)
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*
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* 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
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* *cannot* be a local connection, unless it's
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* actually cptr!). [MyConnect(x) should probably
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* be defined as (x == x->from) --msa ]
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*
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* parc number of variable parameter strings (if zero,
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* parv is allowed to be NULL)
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*
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* parv a NULL terminated list of parameter pointers,
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*
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* parv[0], sender (prefix string), if not present
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* this points to an empty string.
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* parv[1]...parv[parc-1]
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* pointers to additional parameters
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* parv[parc] == NULL, *always*
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*
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* note: it is guaranteed that parv[0]..parv[parc-1] are all
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* non-NULL pointers.
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*/
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#include "config.h"
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#include "client.h"
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#include "hash.h"
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#include "ircd.h"
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#include "ircd_features.h"
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#include "ircd_log.h"
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#include "ircd_reply.h"
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#include "ircd_snprintf.h"
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#include "ircd_string.h"
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#include "list.h"
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#include "msg.h"
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#include "numeric.h"
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#include "numnicks.h"
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#include "s_user.h"
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#include "send.h"
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#include "struct.h"
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/* #include <assert.h> -- Now using assert in ircd_log.h */
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#include <stdlib.h>
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/*
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* ms_settime - server message handler
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*
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* parv[0] = sender prefix
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* parv[1] = new time
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* parv[2] = server name (Only used when sptr is an Oper).
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*/
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int ms_settime(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
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{
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time_t t;
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long dt;
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static char tbuf[11];
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struct DLink *lp;
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if (parc < 2) /* verify argument count */
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return need_more_params(sptr, "SETTIME");
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t = atoi(parv[1]); /* convert time and compute delta */
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dt = TStime() - t;
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/* verify value */
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if (t < OLDEST_TS || dt < -9000000)
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{
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if (IsServer(sptr)) /* protocol violation if it's from a server */
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protocol_violation(sptr, "SETTIME: Bad value (%Tu, delta %ld)", t, dt);
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else
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :SETTIME: Bad value (%Tu, "
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"delta %ld)", sptr, t, dt);
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return 0;
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}
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/* reset time... */
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if (feature_bool(FEAT_RELIABLE_CLOCK))
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{
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ircd_snprintf(0, tbuf, sizeof(tbuf), "%Tu", TStime());
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parv[1] = tbuf;
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}
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if (BadPtr(parv[2])) /* spam the network */
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{
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for (lp = cli_serv(&me)->down; lp; lp = lp->next)
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if (cptr != lp->value.cptr)
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sendcmdto_prio_one(sptr, CMD_SETTIME, lp->value.cptr, "%s", parv[1]);
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}
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else
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{
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if (hunt_server_prio_cmd(sptr, CMD_SETTIME, cptr, 1, "%s %C", 2, parc,
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parv) != HUNTED_ISME)
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{
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/* If the destination was *not* me, but I'm RELIABLE_CLOCK and the
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* delta is more than 30 seconds off, bounce back a corrected
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* SETTIME
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*/
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if (feature_bool(FEAT_RELIABLE_CLOCK) && (dt > 30 || dt < -30))
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sendcmdto_prio_one(&me, CMD_SETTIME, cptr, "%s %C", parv[1], cptr);
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return 0;
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}
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}
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if (feature_bool(FEAT_RELIABLE_CLOCK))
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{
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/* don't apply settime--reliable */
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if ((dt > 600) || (dt < -600))
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sendcmdto_serv_butone(&me, CMD_DESYNCH, 0, ":Bad SETTIME from %s: %Tu "
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"(delta %ld)", cli_name(sptr), t, dt);
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/* Let user know we're ignoring him */
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if (IsUser(sptr))
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{
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is not set %ld "
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"seconds %s : RELIABLE_CLOCK is defined", sptr,
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(dt < 0) ? -dt : dt, (dt < 0) ? "forwards" : "backwards");
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}
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}
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else /* tell opers about time change */
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{
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sendto_opmask_butone(0, SNO_OLDSNO, "SETTIME from %s, clock is set %ld "
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"seconds %s", cli_name(sptr), (dt < 0) ? -dt : dt,
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(dt < 0) ? "forwards" : "backwards");
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/* Apply time change... */
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TSoffset -= dt;
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/* Let the issuing user know what we did... */
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if (IsUser(sptr))
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{
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is set %ld seconds %s",
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sptr, (dt < 0) ? -dt : dt,
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(dt < 0) ? "forwards" : "backwards");
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}
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}
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return 0;
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}
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/*
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* mo_settime - oper message handler
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*
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* parv[0] = sender prefix
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* parv[1] = new time
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* parv[2] = servername (Only used when sptr is an Oper).
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*/
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int mo_settime(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
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{
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time_t t;
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long dt;
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static char tbuf[11];
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/* Must be a global oper */
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if (!IsOper(sptr))
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return send_reply(sptr, ERR_NOPRIVILEGES);
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if (parc < 2) /* verify argument count */
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return need_more_params(sptr, "SETTIME");
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if (parc == 2 && MyUser(sptr)) /* default to me */
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parv[parc++] = cli_name(&me);
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t = atoi(parv[1]); /* convert the time */
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/* If we're reliable_clock or if the oper specified a 0 time, use current */
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if (!t || feature_bool(FEAT_RELIABLE_CLOCK))
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{
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t = TStime();
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ircd_snprintf(0, tbuf, sizeof(tbuf), "%Tu", TStime());
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parv[1] = tbuf;
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}
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dt = TStime() - t; /* calculate the delta */
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if (t < OLDEST_TS || dt < -9000000) /* verify value */
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{
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :SETTIME: Bad value", sptr);
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return 0;
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}
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/* OK, send the message off to its destination */
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if (hunt_server_prio_cmd(sptr, CMD_SETTIME, cptr, 1, "%s %C", 2, parc,
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parv) != HUNTED_ISME)
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return 0;
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if (feature_bool(FEAT_RELIABLE_CLOCK)) /* don't apply settime--reliable */
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{
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if ((dt > 600) || (dt < -600))
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sendcmdto_serv_butone(&me, CMD_DESYNCH, 0, ":Bad SETTIME from %s: %Tu "
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"(delta %ld)", cli_name(sptr), t, dt);
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if (IsUser(sptr)) /* Let user know we're ignoring him */
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is not set %ld seconds "
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"%s: RELIABLE_CLOCK is defined", sptr, (dt < 0) ? -dt : dt,
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(dt < 0) ? "forwards" : "backwards");
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}
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else /* tell opers about time change */
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{
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sendto_opmask_butone(0, SNO_OLDSNO, "SETTIME from %s, clock is set %ld "
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"seconds %s", cli_name(sptr), (dt < 0) ? -dt : dt,
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(dt < 0) ? "forwards" : "backwards");
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TSoffset -= dt; /* apply time change */
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if (IsUser(sptr)) /* let user know what we did */
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is set %ld seconds %s",
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sptr, (dt < 0) ? -dt : dt,
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(dt < 0) ? "forwards" : "backwards");
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}
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return 0;
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}
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