/*
* IRC - Internet Relay Chat, ircd/client.c
* Copyright (C) 1990 Darren Reed
*
* 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.
*/
/** @file
* @brief Implementation of functions for handling local clients.
* @version $Id: client.c 1099 2005-06-22 18:03:53Z sirvulcan $
*/
#include "config.h"
#include "client.h"
#include "class.h"
#include "ircd.h"
#include "ircd_features.h"
#include "ircd_reply.h"
#include "list.h"
#include "msg.h"
#include "msgq.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_debug.h"
#include "send.h"
#include "ircd_struct.h"
#include "ircd_string.h"
#include <assert.h>
#include <string.h>
#define BAD_PING ((unsigned int)-2)
/** Find the shortest non-zero ping time attached to a client.
* If all attached ping times are zero, return the value for
* FEAT_PINGFREQUENCY.
* @param[in] acptr Client to find ping time for.
* @return Ping time in seconds.
*/
int client_get_ping(const struct Client* acptr)
{
int ping = 0;
struct ConfItem* aconf;
struct SLink* link;
assert(cli_verify(acptr));
for (link = cli_confs(acptr); link; link = link->next) {
aconf = link->value.aconf;
if (aconf->status & (CONF_CLIENT | CONF_SERVER)) {
int tmp = get_conf_ping(aconf);
if (0 < tmp && (ping > tmp || !ping))
ping = tmp;
}
}
if (0 == ping)
ping = feature_int(FEAT_PINGFREQUENCY);
Debug((DEBUG_DEBUG, "Client %s Ping %d", cli_name(acptr), ping));
return ping;
}
/** Remove a connection from the list of connections with queued data.
* @param[in] con Connection with no queued data.
*/
void client_drop_sendq(struct Connection* con)
{
if (con_prev_p(con)) { /* on the queued data list... */
if (con_next(con))
con_prev_p(con_next(con)) = con_prev_p(con);
*(con_prev_p(con)) = con_next(con);
con_next(con) = 0;
con_prev_p(con) = 0;
}
}
/** Add a connection to the list of connections with queued data.
* @param[in] con Connection with queued data.
* @param[in,out] con_p Previous pointer to next connection.
*/
void client_add_sendq(struct Connection* con, struct Connection** con_p)
{
if (!con_prev_p(con)) { /* not on the queued data list yet... */
con_prev_p(con) = con_p;
con_next(con) = *con_p;
if (*con_p)
con_prev_p(*con_p) = &(con_next(con));
*con_p = con;
}
}
/** Array mapping privilege values to names and vice versa. */
static struct {
enum Priv priv;
enum Feature feat;
enum {
FEATFLAG_DISABLES_PRIV,
FEATFLAG_ENABLES_PRIV,
FEATFLAG_ADMIN_OPERS,
FEATFLAG_GLOBAL_OPERS,
FEATFLAG_LOCAL_OPERS,
FEATFLAG_ALL_OPERS
} flag;
} feattab[] = {
{ PRIV_WHOX, FEAT_LAST_F, FEATFLAG_ALL_OPERS },
{ PRIV_DISPLAY, FEAT_LAST_F, FEATFLAG_ALL_OPERS },
{ PRIV_CHAN_LIMIT, FEAT_OPER_NO_CHAN_LIMIT, FEATFLAG_ALL_OPERS },
{ PRIV_MODE_LCHAN, FEAT_OPER_MODE_LCHAN, FEATFLAG_ALL_OPERS },
{ PRIV_LOCAL_OPMODE, FEAT_OPER_MODE_LCHAN, FEATFLAG_ALL_OPERS },
{ PRIV_WALK_LCHAN, FEAT_OPER_WALK_THROUGH_LMODES, FEATFLAG_ALL_OPERS },
{ PRIV_DEOP_LCHAN, FEAT_NO_OPER_DEOP_LCHAN, FEATFLAG_ALL_OPERS },
{ PRIV_SHOW_INVIS, FEAT_SHOW_INVISIBLE_USERS, FEATFLAG_ALL_OPERS },
{ PRIV_SHOW_ALL_INVIS, FEAT_SHOW_ALL_INVISIBLE_USERS, FEATFLAG_ALL_OPERS },
{ PRIV_UNLIMIT_QUERY, FEAT_UNLIMIT_OPER_QUERY, FEATFLAG_ALL_OPERS },
{ PRIV_KILL, FEAT_LOCAL_KILL_ONLY, FEATFLAG_DISABLES_PRIV },
{ PRIV_GLINE, FEAT_CONFIG_OPERCMDS, FEATFLAG_ENABLES_PRIV },
{ PRIV_SHUN, FEAT_CONFIG_OPERCMDS, FEATFLAG_ENABLES_PRIV },
{ PRIV_JUPE, FEAT_CONFIG_OPERCMDS, FEATFLAG_ENABLES_PRIV },
{ PRIV_OPMODE, FEAT_CONFIG_OPERCMDS, FEATFLAG_ENABLES_PRIV },
{ PRIV_BADCHAN, FEAT_CONFIG_OPERCMDS, FEATFLAG_ENABLES_PRIV },
/*
* if OPERFLAGS is disabled then any priv below will be given to global
* opers (assuming the feature for the priv is enabled)
*/
{ PRIV_RESTART, FEAT_OPER_RESTART, FEATFLAG_ADMIN_OPERS },
{ PRIV_JUPE, FEAT_OPER_JUPE, FEATFLAG_ADMIN_OPERS },
{ PRIV_DIE, FEAT_OPER_DIE, FEATFLAG_ADMIN_OPERS },
{ PRIV_SET, FEAT_OPER_SET, FEATFLAG_ADMIN_OPERS },
{ PRIV_REMOTEREHASH, FEAT_OPER_REHASH, FEATFLAG_ADMIN_OPERS },
{ PRIV_CHECK, FEAT_CHECK, FEATFLAG_ADMIN_OPERS },
{ PRIV_SEE_SECRET_CHAN, FEAT_OPER_WHOIS_SECRET, FEATFLAG_ADMIN_OPERS },
{ PRIV_PROPAGATE, FEAT_LAST_F, FEATFLAG_GLOBAL_OPERS },
{ PRIV_SEE_OPERS, FEAT_LAST_F, FEATFLAG_GLOBAL_OPERS },
{ PRIV_KILL, FEAT_OPER_KILL, FEATFLAG_GLOBAL_OPERS },
{ PRIV_LOCAL_KILL, FEAT_OPER_KILL, FEATFLAG_GLOBAL_OPERS },
{ PRIV_REHASH, FEAT_OPER_REHASH, FEATFLAG_GLOBAL_OPERS },
{ PRIV_GLINE, FEAT_OPER_GLINE, FEATFLAG_GLOBAL_OPERS },
{ PRIV_LOCAL_GLINE, FEAT_OPER_LGLINE, FEATFLAG_GLOBAL_OPERS },
{ PRIV_SHUN, FEAT_OPER_SHUN, FEATFLAG_GLOBAL_OPERS },
{ PRIV_LOCAL_SHUN, FEAT_OPER_LSHUN, FEATFLAG_GLOBAL_OPERS },
{ PRIV_LOCAL_JUPE, FEAT_OPER_LJUPE, FEATFLAG_GLOBAL_OPERS },
{ PRIV_OPMODE, FEAT_OPER_OPMODE, FEATFLAG_GLOBAL_OPERS },
{ PRIV_LOCAL_OPMODE, FEAT_OPER_LOPMODE, FEATFLAG_GLOBAL_OPERS },
{ PRIV_FORCE_OPMODE, FEAT_OPER_FORCE_OPMODE, FEATFLAG_GLOBAL_OPERS },
{ PRIV_FORCE_LOCAL_OPMODE, FEAT_OPER_FORCE_LOPMODE, FEATFLAG_GLOBAL_OPERS },
{ PRIV_BADCHAN, FEAT_OPER_BADCHAN, FEATFLAG_GLOBAL_OPERS },
{ PRIV_LOCAL_BADCHAN, FEAT_OPER_LBADCHAN, FEATFLAG_GLOBAL_OPERS },
{ PRIV_SEE_CHAN, FEAT_OPERS_SEE_IN_SECRET_CHANNELS, FEATFLAG_GLOBAL_OPERS },
{ PRIV_WIDE_GLINE, FEAT_OPER_WIDE_GLINE, FEATFLAG_GLOBAL_OPERS },
{ PRIV_WIDE_SHUN, FEAT_OPER_WIDE_SHUN, FEATFLAG_GLOBAL_OPERS },
{ PRIV_LOCAL_KILL, FEAT_LOCOP_KILL, FEATFLAG_LOCAL_OPERS },
{ PRIV_REHASH, FEAT_LOCOP_REHASH, FEATFLAG_LOCAL_OPERS },
{ PRIV_RESTART, FEAT_LOCOP_RESTART, FEATFLAG_LOCAL_OPERS },
{ PRIV_DIE, FEAT_LOCOP_DIE, FEATFLAG_LOCAL_OPERS },
{ PRIV_LOCAL_GLINE, FEAT_LOCOP_LGLINE, FEATFLAG_LOCAL_OPERS },
{ PRIV_LOCAL_SHUN, FEAT_LOCOP_LSHUN, FEATFLAG_LOCAL_OPERS },
{ PRIV_LOCAL_JUPE, FEAT_LOCOP_LJUPE, FEATFLAG_LOCAL_OPERS },
{ PRIV_LOCAL_OPMODE, FEAT_LOCOP_LOPMODE, FEATFLAG_LOCAL_OPERS },
{ PRIV_FORCE_LOCAL_OPMODE, FEAT_LOCOP_FORCE_LOPMODE, FEATFLAG_LOCAL_OPERS },
{ PRIV_LOCAL_BADCHAN, FEAT_LOCOP_LBADCHAN, FEATFLAG_LOCAL_OPERS },
{ PRIV_SET, FEAT_LOCOP_SET, FEATFLAG_LOCAL_OPERS },
{ PRIV_SEE_CHAN, FEAT_LOCOP_SEE_IN_SECRET_CHANNELS, FEATFLAG_LOCAL_OPERS },
{ PRIV_WIDE_GLINE, FEAT_LOCOP_WIDE_GLINE, FEATFLAG_LOCAL_OPERS },
{ PRIV_WIDE_SHUN, FEAT_LOCOP_WIDE_SHUN, FEATFLAG_LOCAL_OPERS },
{ PRIV_LAST_PRIV, FEAT_LAST_F, 0 }
};
/** Array mapping privilege values to names and vice versa. */
static struct {
char *name;
unsigned int priv;
} privtab[] = {
#define P(priv) { #priv, PRIV_ ## priv }
P(CHAN_LIMIT), P(MODE_LCHAN), P(WALK_LCHAN), P(DEOP_LCHAN),
P(SHOW_INVIS), P(SHOW_ALL_INVIS), P(UNLIMIT_QUERY), P(KILL),
P(LOCAL_KILL), P(REHASH), P(RESTART), P(DIE),
P(GLINE), P(LOCAL_GLINE), P(JUPE), P(LOCAL_JUPE),
P(OPMODE), P(LOCAL_OPMODE), P(SET), P(WHOX),
P(BADCHAN), P(LOCAL_BADCHAN), P(SEE_CHAN), P(PROPAGATE),
P(DISPLAY), P(SEE_OPERS), P(WIDE_GLINE), P(FORCE_OPMODE),
P(FORCE_LOCAL_OPMODE), P(REMOTEREHASH), P(CHECK), P(SEE_SECRET_CHAN),
P(SHUN), P(LOCAL_SHUN), P(WIDE_SHUN),
#undef P
{ 0, 0 }
};
/** Set privileges on \a client.
* @param[in] client Client whos privileges are being set.
* @return Zero.
*/
void
client_set_privs(struct Client* client)
{
struct Privs privs;
struct Privs antiprivs;
int i;
memset(&privs, 0, sizeof(struct Privs));
memset(&antiprivs, 0, sizeof(struct Privs));
if (!IsAnOper(client)) { /* clear privilege mask */
memset(&(cli_privs(client)), 0, sizeof(struct Privs));
return;
} else if (!MyConnect(client) && !IsRemoteOper(client)) {
memset(&(cli_privs(client)), 255, sizeof(struct Privs));
PrivClr(&(cli_privs(client)), PRIV_SET);
return;
}
/* This sequence is temporary until the .conf is carefully rewritten */
for (i = 0; feattab[i].priv != PRIV_LAST_PRIV; i++) {
if (feattab[i].flag == FEATFLAG_ENABLES_PRIV) {
if (!feature_bool(feattab[i].feat))
PrivSet(&antiprivs, feattab[i].priv);
} else if (feattab[i].feat == FEAT_LAST_F || feature_bool(feattab[i].feat)) {
if (feattab[i].flag == FEATFLAG_DISABLES_PRIV) {
PrivSet(&antiprivs, feattab[i].priv);
} else if (feattab[i].flag == FEATFLAG_ALL_OPERS) {
if (IsAnOper(client))
PrivSet(&privs, feattab[i].priv);
} else if (feattab[i].flag == FEATFLAG_GLOBAL_OPERS) {
if (IsOper(client))
PrivSet(&privs, feattab[i].priv);
} else if (feattab[i].flag == FEATFLAG_ADMIN_OPERS) {
if (feature_bool(FEAT_OPERFLAGS)) {
if (IsAdmin(client))
PrivSet(&privs, feattab[i].priv);
} else {
if (IsOper(client))
PrivSet(&privs, feattab[i].priv);
}
} else if (feattab[i].flag == FEATFLAG_LOCAL_OPERS) {
if (IsLocOp(client))
PrivSet(&privs, feattab[i].priv);
}
}
}
/* This is the end of the gross section */
if (PrivHas(&privs, PRIV_PROPAGATE))
PrivSet(&privs, PRIV_DISPLAY); /* force propagating opers to display */
else { /* if they don't propagate oper status, prevent desyncs */
PrivSet(&antiprivs, PRIV_KILL);
PrivSet(&antiprivs, PRIV_GLINE);
PrivSet(&antiprivs, PRIV_SHUN);
PrivSet(&antiprivs, PRIV_JUPE);
PrivSet(&antiprivs, PRIV_OPMODE);
PrivSet(&antiprivs, PRIV_BADCHAN);
}
for (i = 0; i <= _PRIV_IDX(PRIV_LAST_PRIV); i++)
privs.priv_mask[i] &= ~antiprivs.priv_mask[i];
cli_privs(client) = privs;
if (IsRemoteOper(client)) {
char privbuf[512] = "";
int i;
/* Send privileges */
for (i = 0; privtab[i].name; i++)
if (HasPriv(client, privtab[i].priv)) {
strcat(privbuf, privtab[i].name);
strcat(privbuf, ",");
}
privbuf[strlen(privbuf)] = 0;
sendcmdto_one(&me, CMD_PRIVS, client, "%C %s", client, privbuf);
ClearRemoteOper(client);
/* Call client_set_privs() recursively so that privileges
are set for a remote user rather than like any oper */
client_set_privs(client);
}
}
/** Report privileges of \a client to \a to.
* @param[in] to Client requesting privilege list.
* @param[in] client Client whos privileges should be listed.
* @return Zero.
*/
int
client_report_privs(struct Client *to, struct Client *client)
{
struct MsgBuf *mb;
int found1 = 0;
int i;
mb = msgq_make(to, rpl_str(RPL_PRIVS), cli_name(&me), cli_name(to),
cli_name(client));
for (i = 0; privtab[i].name; i++)
if (HasPriv(client, privtab[i].priv))
msgq_append(0, mb, "%s%s", found1++ ? " " : "", privtab[i].name);
send_buffer(to, mb, 0); /* send response */
msgq_clean(mb);
return 0;
}
int client_modify_priv_by_name(struct Client *who, char *priv, int what) {
int i = 0;
assert(0 != priv);
assert(0 != who);
for (i = 0; privtab[i].name; i++)
if (0 == ircd_strcmp(privtab[i].name, priv)) {
if (what == PRIV_ADD)
GrantPriv(who, privtab[i].priv);
else if (what == PRIV_DEL) {
RevokePriv(who, privtab[i].priv);
}
}
return 0;
}
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