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ircu2/ircd/m_whois.c

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/*
* IRC - Internet Relay Chat, ircd/m_whois.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
*
* See file AUTHORS in IRC package for additional names of
* the programmers.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: m_whois.c 1667 2006-06-09 02:16:17Z entrope $
*/
/*
* m_functions execute protocol messages on this server:
*
* cptr is always NON-NULL, pointing to a *LOCAL* client
* structure (with an open socket connected!). This
* identifies the physical socket where the message
* originated (or which caused the m_function to be
* executed--some m_functions may call others...).
*
* sptr is the source of the message, defined by the
* prefix part of the message if present. If not
* or prefix not found, then sptr==cptr.
*
* (!IsServer(cptr)) => (cptr == sptr), because
* prefixes are taken *only* from servers...
*
* (IsServer(cptr))
* (sptr == cptr) => the message didn't
* have the prefix.
*
* (sptr != cptr && IsServer(sptr) means
* the prefix specified servername. (?)
*
* (sptr != cptr && !IsServer(sptr) means
* that message originated from a remote
* user (not local).
*
* combining
*
* (!IsServer(sptr)) means that, sptr can safely
* taken as defining the target structure of the
* message in this server.
*
* *Always* true (if 'parse' and others are working correct):
*
* 1) sptr->from == cptr (note: cptr->from == cptr)
*
* 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
* *cannot* be a local connection, unless it's
* actually cptr!). [MyConnect(x) should probably
* be defined as (x == x->from) --msa ]
*
* parc number of variable parameter strings (if zero,
* parv is allowed to be NULL)
*
* parv a NULL terminated list of parameter pointers,
*
* parv[0], sender (prefix string), if not present
* this points to an empty string.
* parv[1]...parv[parc-1]
* pointers to additional parameters
* parv[parc] == NULL, *always*
*
* note: it is guaranteed that parv[0]..parv[parc-1] are all
* non-NULL pointers.
*/
#include "config.h"
#include "channel.h"
#include "client.h"
#include "hash.h"
#include "ircd.h"
#include "ircd_features.h"
#include "ircd_log.h"
#include "ircd_reply.h"
#include "ircd_string.h"
#include "list.h"
#include "match.h"
#include "msg.h"
#include "numeric.h"
#include "numnicks.h"
#include "s_user.h"
#include "send.h"
#include "whocmds.h"
/* #include <assert.h> -- Now using assert in ircd_log.h */
#include <string.h>
/*
* 2000-07-01: Isomer
* * Rewritten to make this understandable
* * You can no longer /whois unregistered clients.
*
*
* General rules:
* /whois nick always shows the nick.
* /whois wild* shows the nick if:
* * they aren't +i and aren't on any channels.
* * they are on a common channel.
* * they aren't +i and are on a public channel. (not +p and not +s)
* * they aren't +i and are on a private channel. (+p but not +s)
* Or to look at it another way (I think):
* * +i users are only shown if your on a common channel.
* * users on +s channels only aren't shown.
*
* whois doesn't show what channels a +k client is on, for the reason that
* /whois X or /whois W floods a user off the server. :)
*
* nb: if the code and this comment disagree, the codes right and I screwed
* up.
*/
/*
* Send whois reply containing the marks for client.
*/
void client_whois_marks(struct Client *client, struct Client *replyto, const char *name)
{
static char markbufp[BUFSIZE] = "";
struct SLink* dp = NULL;
if (!IsMarked(client))
return;
memset(&markbufp, 0, BUFSIZE);
for (dp = cli_marks(client); dp; dp = dp->next) {
if (strlen(markbufp) + strlen(dp->value.cp) + 4 > 70) {
send_reply(replyto, RPL_WHOISMARKS, name, markbufp);
memset(&markbufp, 0, BUFSIZE);
}
/* Security fix: Replace strcat cu strncat pentru protectie buffer overflow */
if (markbufp[0]) {
size_t remaining = BUFSIZE - strlen(markbufp) - 1;
if (remaining > 2) {
strncat(markbufp, ", ", remaining);
}
}
size_t remaining = BUFSIZE - strlen(markbufp) - 1;
if (remaining > 0 && dp->value.cp) {
strncat(markbufp, dp->value.cp, remaining);
}
}
if (markbufp[0]) {
send_reply(replyto, RPL_WHOISMARKS, name, markbufp);
}
}
/*
* Send whois information for acptr to sptr
*/
static void do_whois(struct Client* sptr, struct Client *acptr, int parc)
{
struct Client *a2cptr=0;
struct Channel *chptr=0;
int mlen;
int len;
static char buf[512];
const struct User* user = cli_user(acptr);
const char* name = (!*(cli_name(acptr))) ? "?" : cli_name(acptr);
a2cptr = feature_bool(FEAT_HIS_WHOIS_SERVERNAME) && !IsAnOper(sptr)
&& sptr != acptr ? &his : user->server;
assert(user);
send_reply(sptr, RPL_WHOISUSER, name, user->username, user->host,
cli_info(acptr));
/* Display the channels this user is on.
* Ascunde canalele dacă:
* - Target e channel service SAU
* - Target are NoChan (+n) SAU
* - Target are PRIV_HIDE_CHANNELS (hide_channels = yes în config)
* EXCEPȚIE: Arată dacă target e tu însuți SAU cine face WHOIS e oper
*/
int hide_target_channels = (IsChannelService(acptr) || IsNoChan(acptr) ||
HasPriv(acptr, PRIV_HIDE_CHANNELS));
if (!hide_target_channels || (acptr==sptr) || IsAnOper(sptr))
{
struct Membership* chan;
mlen = strlen(cli_name(&me)) + strlen(cli_name(sptr)) + 12 + strlen(name);
len = 0;
*buf = '\0';
for (chan = user->channel; chan; chan = chan->next_channel)
{
chptr = chan->channel;
if (!ShowChannel(sptr, chptr)
&& !(IsOper(sptr) && IsLocalChannel(chptr->chname)))
continue;
if (acptr != sptr && IsZombie(chan))
continue;
/* Don't show local channels when HIS is defined, unless it's a
* remote WHOIS --ULtimaTe_
*/
if (IsLocalChannel(chptr->chname) && (acptr != sptr) && (parc == 2)
&& feature_bool(FEAT_HIS_WHOIS_LOCALCHAN) && !IsAnOper(sptr))
continue;
if (len+strlen(chptr->chname) + mlen > BUFSIZE - 5)
{
send_reply(sptr, SND_EXPLICIT | RPL_WHOISCHANNELS, "%s :%s", name, buf);
*buf = '\0';
len = 0;
}
if (IsDeaf(acptr))
*(buf + len++) = '-';
if (!ShowChannel(sptr, chptr) || (IsNoChan(acptr) && IsAnOper(sptr) && (acptr != sptr)))
*(buf + len++) = '*';
if (IsDelayedJoin(chan) && (sptr != acptr))
*(buf + len++) = '<';
else if (IsChanOp(chan))
*(buf + len++) = '@';
else if (IsHalfOp(chan))
*(buf + len++) = '%';
else if (HasVoice(chan))
*(buf + len++) = '+';
else if (IsZombie(chan))
*(buf + len++) = '!';
if (len)
*(buf + len) = '\0';
/* Security fix: Replace strcpy/strcat cu operații sigure */
size_t buf_remaining = sizeof(buf) - len - 1;
if (buf_remaining > strlen(chptr->chname)) {
strcpy(buf + len, chptr->chname);
len += strlen(chptr->chname);
if (len < sizeof(buf) - 2) {
buf[len++] = ' ';
buf[len] = '\0';
}
}
}
if (buf[0] != '\0')
send_reply(sptr, RPL_WHOISCHANNELS, name, buf);
}
send_reply(sptr, RPL_WHOISSERVER, name, cli_name(a2cptr),
cli_info(a2cptr));
if (user)
{
if (user->away)
send_reply(sptr, RPL_AWAY, name, user->away);
/* Verifică dacă operul e vizibil în WHOIS
* IsHideOper() = TRUE când hide_oper = yes în config
* Pentru stealth oper (hide_oper = yes), NU afișa mesajul
* Permite investigații undercover fără să fie detectat
*/
/* DEBUG: Log pentru verificare IsHideOper */
if (IsAnOper(acptr)) {
log_write(LS_DEBUG, L_INFO, 0, "WHOIS DEBUG: %s - SeeOper=%d IsHideOper=%d IsAdmin=%d",
name, SeeOper(sptr,acptr), IsHideOper(acptr), IsAdmin(acptr));
}
if (SeeOper(sptr,acptr) && !IsHideOper(acptr)) {
if (IsAdmin(acptr))
send_reply(sptr, RPL_WHOISOPERATOR, name, feature_str(FEAT_WHOIS_ADMIN));
else
send_reply(sptr, RPL_WHOISOPERATOR, name, feature_str(FEAT_WHOIS_OPER));
}
if (IsAccount(acptr))
send_reply(sptr, RPL_WHOISACCOUNT, name, user->account);
if (IsHiddenHost(acptr) && (IsAnOper(sptr) || acptr == sptr))
send_reply(sptr, RPL_WHOISACTUALLY, name, user->username,
user->realhost, ircd_ntoa(&cli_ip(acptr)));
/* Hint: if your looking to add more flags to a user, eg +h, here's
* probably a good place to add them :)
*/
if (IsChannelService(acptr))
send_reply(sptr, RPL_WHOISSERVICE, name, feature_str(FEAT_WHOIS_SERVICE));
if (IsAccountOnly(acptr) && !IsPrivDeaf(acptr))
send_reply(sptr, RPL_WHOISSPECIAL, name, "only accepts messages from registered users");
if (IsPrivDeaf(acptr))
send_reply(sptr, RPL_WHOISPRIVDEAF, name);
if (IsBot(acptr))
send_reply(sptr, RPL_WHOISBOT, name);
if (IsMarked(acptr))
client_whois_marks(acptr, sptr, name);
if (cli_killmark(acptr) && !EmptyString(cli_killmark(acptr)))
send_reply(sptr, RPL_WHOISKILL, name, cli_killmark(acptr));
if (IsSSL(acptr)) {
send_reply(sptr, RPL_WHOISSSL, name);
if (cli_sslclifp(acptr) && !EmptyString(cli_sslclifp(acptr)))
send_reply(sptr, RPL_WHOISSSLFP, name, cli_sslclifp(acptr));
}
if (!EmptyString(user->swhois))
send_reply(sptr, RPL_WHOISSPECIAL, name, user->swhois);
if (cli_webirc(acptr) && !EmptyString(cli_webirc(acptr)))
send_reply(sptr, RPL_WHOISWEBIRC, name, cli_webirc(acptr));
if (MyConnect(acptr) && (IsAnOper(sptr) || (!IsNoIdle(acptr) &&
(!feature_bool(FEAT_HIS_WHOIS_IDLETIME) || sptr == acptr ||
parc >= 3))))
send_reply(sptr, RPL_WHOISIDLE, name, CurrentTime - user->last,
cli_firsttime(acptr));
if (IsOper(acptr) && IsWhoisNotice(acptr) && (sptr != acptr))
sendcmdto_one(&me, CMD_NOTICE, acptr,
"%C :*** Notice -- %s (%s@%s) did a /whois on you.",
acptr, cli_name(sptr), cli_user(sptr)->username,
cli_user(sptr)->host);
}
}
/*
* Search and return as many people as matched by the wild 'nick'.
* returns the number of people found (or, obviously, 0, if none where
* found).
*/
static int do_wilds(struct Client* sptr, char *nick, int count, int parc)
{
struct Client *acptr; /* Current client we're considering */
struct User *user; /* the user portion of the client */
struct Membership* chan;
int invis; /* does +i apply? */
int member; /* Is this user on any channels? */
int showperson; /* Should we show this person? */
int found = 0 ; /* How many were found? */
/* Ech! This is hideous! */
for (acptr = GlobalClientList; (acptr = next_client(acptr, nick));
acptr = cli_next(acptr))
{
if (!IsRegistered(acptr))
continue;
if (IsServer(acptr))
continue;
/*
* I'm always last :-) and acptr->next == 0!!
*
* Isomer: Does this strike anyone else as being a horrible hideous
* hack?
*/
if (IsMe(acptr)) {
assert(!cli_next(acptr));
break;
}
/*
* 'Rules' established for sending a WHOIS reply:
*
* - if wildcards are being used don't send a reply if
* the querier isn't any common channels and the
* client in question is invisible.
*
* - only send replies about common or public channels
* the target user(s) are on;
*/
user = cli_user(acptr);
assert(user);
invis = (acptr != sptr) && IsInvisible(acptr);
member = (user && user->channel) ? 1 : 0;
showperson = !invis && !member;
/* Should we show this person now? */
if (showperson) {
found++;
do_whois(sptr, acptr, parc);
if (count+found>MAX_WHOIS_LINES)
return found;
continue;
}
/* Step through the channels this user is on */
for (chan = user->channel; chan; chan = chan->next_channel)
{
struct Channel *chptr = chan->channel;
/* If this is a public channel, show the person */
if (!invis && PubChannel(chptr)) {
showperson = 1;
break;
}
/* if this channel is +p and not +s, show them */
if (!invis && HiddenChannel(chptr) && !SecretChannel(chptr)) {
showperson = 1;
break;
}
member = find_channel_member(sptr, chptr) ? 1 : 0;
if (invis && !member)
continue;
/* If sptr isn't really on this channel, skip it */
if (IsZombie(chan))
continue;
/* Is this a common channel? */
if (member) {
showperson = 1;
break;
}
} /* of for (chan in channels) */
/* Don't show this person */
if (!showperson)
continue;
do_whois(sptr, acptr, parc);
found++;
if (count+found>MAX_WHOIS_LINES)
return found;
} /* of global client list */
return found;
}
/*
* m_whois - generic message handler
*
* parv[0] = sender prefix
* parv[1] = nickname masklist
*
* or
*
* parv[1] = target server, or a nickname representing a server to target.
* parv[2] = nickname masklist
*/
int m_whois(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
char* nick;
char* tmp;
char* p = 0;
int found = 0;
int total = 0;
int wildscount = 0;
if (parc < 2)
{
send_reply(sptr, ERR_NONICKNAMEGIVEN);
return 0;
}
if (parc > 2)
{
/* For convenience: Accept a nickname as first parameter, by replacing
* it with the correct servername - as is needed by hunt_server().
* This is the secret behind the /whois nick nick trick.
*/
if (feature_int(FEAT_HIS_REMOTE))
{
/* If remote queries are disabled, then use the *second* parameter of
* of whois, so /whois nick nick still works.
*/
if (!IsAnOper(sptr))
{
if (!FindUser(parv[2]))
{
send_reply(sptr, ERR_NOSUCHNICK, parv[2]);
send_reply(sptr, RPL_ENDOFWHOIS, parv[2]);
return 0;
}
parv[1] = parv[2];
}
}
if (hunt_server_cmd(sptr, CMD_WHOIS, cptr, 0, "%C :%s", 1, parc, parv) !=
HUNTED_ISME)
return 0;
parv[1] = parv[2];
}
for (tmp = parv[1]; (nick = ircd_strtok(&p, tmp, ",")); tmp = 0)
{
int wilds;
found = 0;
collapse(nick);
wilds = (strchr(nick, '?') || strchr(nick, '*'));
if (!wilds) {
struct Client *acptr = 0;
/* No wildcards */
acptr = FindUser(nick);
if (acptr && !IsServer(acptr)) {
do_whois(sptr, acptr, parc);
found = 1;
}
}
else /* wilds */
{
if (++wildscount > 3) {
send_reply(sptr, ERR_QUERYTOOLONG, parv[1]);
break;
}
found=do_wilds(sptr, nick, total, parc);
}
if (!found)
send_reply(sptr, ERR_NOSUCHNICK, nick);
total+=found;
if (total >= MAX_WHOIS_LINES) {
send_reply(sptr, ERR_QUERYTOOLONG, parv[1]);
break;
}
if (p)
p[-1] = ',';
} /* of tokenised parm[1] */
send_reply(sptr, RPL_ENDOFWHOIS, parv[1]);
return 0;
}
/*
* ms_whois - server message handler
*
* parv[0] = sender prefix
* parv[1] = nickname masklist
*
* or
*
* parv[1] = target server, or a nickname representing a server to target.
* parv[2] = nickname masklist
*/
int ms_whois(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
char* nick;
char* tmp;
char* p = 0;
int found = 0;
int total = 0;
if (parc < 2)
{
send_reply(sptr, ERR_NONICKNAMEGIVEN);
return 0;
}
if (parc > 2)
{
if (hunt_server_cmd(sptr, CMD_WHOIS, cptr, 0, "%C :%s", 1, parc, parv) !=
HUNTED_ISME)
return 0;
parv[1] = parv[2];
}
total = 0;
for (tmp = parv[1]; (nick = ircd_strtok(&p, tmp, ",")); tmp = 0)
{
struct Client *acptr = 0;
found = 0;
collapse(nick);
acptr = FindUser(nick);
if (acptr && !IsServer(acptr)) {
found++;
do_whois(sptr, acptr, parc);
}
if (!found)
send_reply(sptr, ERR_NOSUCHNICK, nick);
total+=found;
if (total >= MAX_WHOIS_LINES) {
send_reply(sptr, ERR_QUERYTOOLONG, parv[1]);
break;
}
if (p)
p[-1] = ',';
} /* of tokenised parm[1] */
send_reply(sptr, RPL_ENDOFWHOIS, parv[1]);
return 0;
}
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