337 lines
10 KiB
C
337 lines
10 KiB
C
/*
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* IRC - Internet Relay Chat, ircd/m_trace.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_trace.c 1468 2005-08-26 03:23:23Z entrope $
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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 "class.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_string.h"
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#include "match.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_bsd.h"
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#include "s_conf.h"
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#include "s_user.h"
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#include "send.h"
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#include "version.h"
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/* #include <assert.h> -- Now using assert in ircd_log.h */
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#include <string.h>
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void do_trace(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
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{
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int i;
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struct Client *acptr;
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struct Client *acptr2;
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const struct ConnectionClass* cl;
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char* tname;
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int doall;
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int link_s[MAXCONNECTIONS];
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int link_u[MAXCONNECTIONS];
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int wilds;
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int dow;
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if (parc < 2 || BadPtr(parv[1]))
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{
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/* just "TRACE" without parameters. Must be from local client */
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parc = 1;
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acptr = &me;
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tname = cli_name(&me);
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i = HUNTED_ISME;
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}
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else if (parc < 3 || BadPtr(parv[2]))
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{
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/* No target specified. Make one before propagating. */
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parc = 2;
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tname = parv[1];
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if ((acptr = find_match_server(parv[1])) ||
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((acptr = FindClient(parv[1])) && !MyUser(acptr)))
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{
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if (IsUser(acptr))
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parv[2] = cli_name(cli_user(acptr)->server);
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else
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parv[2] = cli_name(acptr);
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parc = 3;
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parv[3] = 0;
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if ((i = hunt_server_cmd(sptr, CMD_TRACE, cptr, IsServer(acptr),
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"%s :%C", 2, parc, parv)) == HUNTED_NOSUCH)
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return;
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}
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else
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i = HUNTED_ISME;
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} else {
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/* Got "TRACE <tname> :<target>" */
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parc = 3;
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if (MyUser(sptr) || Protocol(cptr) < 10)
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acptr = find_match_server(parv[2]);
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else
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acptr = FindNServer(parv[2]);
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if ((i = hunt_server_cmd(sptr, CMD_TRACE, cptr, 0, "%s :%C", 2, parc,
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parv)) == HUNTED_NOSUCH)
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return;
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tname = parv[1];
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}
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if (i == HUNTED_PASS) {
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if (!acptr)
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acptr = next_client(GlobalClientList, tname);
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else
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acptr = cli_from(acptr);
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send_reply(sptr, RPL_TRACELINK,
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version, debugmode, tname,
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acptr ? cli_name(cli_from(acptr)) : "<No_match>");
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return;
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}
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doall = (parv[1] && (parc > 1)) ? !match(tname, cli_name(&me)) : 1;
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wilds = !parv[1] || strchr(tname, '*') || strchr(tname, '?');
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dow = wilds || doall;
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/* Don't give (long) remote listings to lusers */
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if (dow && !MyConnect(sptr) && !IsAnOper(sptr)) {
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send_reply(sptr, RPL_TRACEEND);
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return;
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}
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for (i = 0; i < MAXCONNECTIONS; i++)
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link_s[i] = 0, link_u[i] = 0;
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if (doall) {
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for (acptr = GlobalClientList; acptr; acptr = cli_next(acptr)) {
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if (IsUser(acptr))
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link_u[cli_fd(cli_from(acptr))]++;
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else if (IsServer(acptr))
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link_s[cli_fd(cli_from(acptr))]++;
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}
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}
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/* report all direct connections */
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for (i = 0; i <= HighestFd; i++) {
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const char *conClass;
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if (!(acptr = LocalClientArray[i])) /* Local Connection? */
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continue;
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if (IsInvisible(acptr) && dow && !(MyConnect(sptr) && IsOper(sptr)) &&
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!IsAnOper(acptr) && (acptr != sptr))
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continue;
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if (!doall && wilds && match(tname, cli_name(acptr)))
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continue;
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if (!dow && 0 != ircd_strcmp(tname, cli_name(acptr)))
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continue;
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conClass = get_client_class(acptr);
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switch (cli_status(acptr)) {
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case STAT_CONNECTING:
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send_reply(sptr, RPL_TRACECONNECTING, conClass, cli_name(acptr));
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break;
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case STAT_HANDSHAKE:
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send_reply(sptr, RPL_TRACEHANDSHAKE, conClass, cli_name(acptr));
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break;
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case STAT_ME:
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break;
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case STAT_UNKNOWN:
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case STAT_UNKNOWN_USER:
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send_reply(sptr, RPL_TRACEUNKNOWN, conClass,
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get_client_name(acptr, HIDE_IP));
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break;
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case STAT_UNKNOWN_SERVER:
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send_reply(sptr, RPL_TRACEUNKNOWN, conClass, "Unknown Server");
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break;
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case STAT_USER:
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/* Only opers see users if there is a wildcard
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but anyone can see all the opers. */
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if ((IsAnOper(sptr) && (MyUser(sptr) ||
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!(dow && IsInvisible(acptr)))) || !dow || IsAnOper(acptr)) {
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if (IsAnOper(acptr))
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send_reply(sptr, RPL_TRACEOPERATOR, conClass,
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get_client_name(acptr, SHOW_IP),
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CurrentTime - cli_lasttime(acptr));
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else
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send_reply(sptr, RPL_TRACEUSER, conClass,
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get_client_name(acptr, SHOW_IP),
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CurrentTime - cli_lasttime(acptr));
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}
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break;
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/*
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* Connection is a server
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*
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* Serv <class> <nS> <nC> <name> <ConnBy> <last> <age>
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*
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* class Class the server is in
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* nS Number of servers reached via this link
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* nC Number of clients reached via this link
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* name Name of the server linked
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* ConnBy Who established this link
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* last Seconds since we got something from this link
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* age Seconds this link has been alive
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*
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* Additional comments etc...... -Cym-<cym@acrux.net>
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*/
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case STAT_SERVER:
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if (cli_serv(acptr)->user) {
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if (!cli_serv(acptr)->by[0]
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|| !(acptr2 = findNUser(cli_serv(acptr)->by))
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|| (cli_user(acptr2) != cli_serv(acptr)->user))
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acptr2 = NULL;
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send_reply(sptr, RPL_TRACESERVER, conClass, link_s[i],
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link_u[i], cli_name(acptr),
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acptr2 ? cli_name(acptr2) : "*",
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cli_serv(acptr)->user->username,
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cli_serv(acptr)->user->host,
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CurrentTime - cli_lasttime(acptr),
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CurrentTime - cli_serv(acptr)->timestamp);
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} else
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send_reply(sptr, RPL_TRACESERVER, conClass, link_s[i],
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link_u[i], cli_name(acptr),
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(*(cli_serv(acptr))->by) ? cli_serv(acptr)->by : "*", "*",
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cli_name(&me), CurrentTime - cli_lasttime(acptr),
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CurrentTime - cli_serv(acptr)->timestamp);
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break;
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default: /* We actually shouldn't come here, -msa */
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send_reply(sptr, RPL_TRACENEWTYPE, get_client_name(acptr, HIDE_IP));
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break;
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}
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}
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/*
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* Add these lines to summarize the above which can get rather long
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* and messy when done remotely - Avalon
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*/
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if (IsAnOper(sptr) && doall) {
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for (cl = get_class_list(); cl; cl = cl->next) {
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if (Links(cl) > 1)
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send_reply(sptr, RPL_TRACECLASS, ConClass(cl), Links(cl) - 1);
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}
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}
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send_reply(sptr, RPL_TRACEEND);
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}
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/*
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* m_trace - generic message handler
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*
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* parv[0] = sender prefix
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* parv[1] = nick or servername
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* parv[2] = 'target' servername
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*/
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int m_trace(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
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{
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if (feature_bool(FEAT_HIS_TRACE))
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return send_reply(cptr, ERR_NOPRIVILEGES);
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do_trace(cptr, sptr, parc, parv);
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return 0;
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}
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/*
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* ms_trace - server message handler
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*
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* parv[0] = sender prefix
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* parv[1] = nick or servername
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* parv[2] = 'target' servername
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*/
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int ms_trace(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
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{
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do_trace(cptr, sptr, parc, parv);
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return 0;
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}
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/*
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* mo_trace - oper message handler
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*
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* parv[0] = sender prefix
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* parv[1] = nick or servername
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* parv[2] = 'target' servername
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*/
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int mo_trace(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
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{
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if (feature_bool(FEAT_HIS_TRACE) && !IsAnOper(sptr))
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return send_reply(cptr, ERR_NOPRIVILEGES);
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do_trace(cptr, sptr, parc, parv);
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return 0;
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}
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