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ircu2/ircd/client.c

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/*
* 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 1523 2005-10-12 23:52:12Z entrope $
*/
#include "config.h"
#include "client.h"
#include "class.h"
#include "ircd.h"
#include "ircd_features.h"
#include "ircd_log.h"
#include "ircd_reply.h"
#include "ircd_snprintf.h"
#include "ircd_string.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 "struct.h"
/* #include <assert.h> -- Now using assert in ircd_log.h */
#include <string.h>
/** 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;
}
/** Find the default usermode for a client.
* @param[in] sptr Client to find default usermode for.
* @return Pointer to usermode string (or NULL, if there is no default).
*/
const char* client_get_default_umode(const struct Client* sptr)
{
struct ConfItem* aconf;
struct SLink* link;
assert(cli_verify(sptr));
for (link = cli_confs(sptr); link; link = link->next) {
aconf = link->value.aconf;
if ((aconf->status & CONF_CLIENT) && ConfUmode(aconf))
return ConfUmode(aconf);
}
return NULL;
}
/** Find the number of host components to hide for a client.
* @param[in] sptr Client to find the number of host components to hide for.
* @return The number of host components to hide.
*/
int client_get_hidehostcomponents(const struct Client* sptr)
{
struct ConfItem* aconf;
struct SLink* link;
assert(cli_verify(sptr));
for (link = cli_confs(sptr); link; link = link->next) {
aconf = link->value.aconf;
if ((aconf->status & CONF_CLIENT) && (aconf->hidehostcomps > 0))
return aconf->hidehostcomps;
}
return feature_int(FEAT_HOST_HIDING_COMPONENTS);
}
/** 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;
}
}
/** Default privilege set for global operators. */
static struct Privs privs_global;
/** Default privilege set for local operators. */
static struct Privs privs_local;
/** Non-zero if #privs_global and #privs_local have been initialized. */
static int privs_defaults_set;
/* client_set_privs(struct Client* client)
*
* Sets the privileges for opers.
*/
/** Set the privileges for a client.
* @param[in] client Client who has become an operator.
* @param[in] oper Configuration item describing oper's privileges.
*/
void
client_set_privs(struct Client *client, struct ConfItem *oper)
{
struct Privs *source, *defaults;
enum Priv priv;
/* Clear out client's privileges. */
memset(&cli_privs(client), 0, sizeof(struct Privs));
if (!IsAnOper(client) || !oper)
return;
if (!privs_defaults_set)
{
memset(&privs_global, -1, sizeof(privs_global));
FlagClr(&privs_global, PRIV_WALK_LCHAN);
FlagClr(&privs_global, PRIV_UNLIMIT_QUERY);
FlagClr(&privs_global, PRIV_SET);
FlagClr(&privs_global, PRIV_BADCHAN);
FlagClr(&privs_global, PRIV_LOCAL_BADCHAN);
FlagClr(&privs_global, PRIV_APASS_OPMODE);
FlagClr(&privs_global, PRIV_WHOIS_NOTICE);
FlagClr(&privs_global, PRIV_HIDE_OPER);
FlagClr(&privs_global, PRIV_HIDE_CHANNELS);
FlagClr(&privs_global, PRIV_HIDE_IDLE);
FlagClr(&privs_global, PRIV_ADMIN);
FlagClr(&privs_global, PRIV_XTRAOP);
FlagClr(&privs_global, PRIV_SERVICE);
FlagClr(&privs_global, PRIV_REMOTE);
FlagClr(&privs_global, PRIV_FREEFORM);
FlagClr(&privs_global, PRIV_REMOVE);
memset(&privs_local, 0, sizeof(privs_local));
FlagSet(&privs_local, PRIV_CHAN_LIMIT);
FlagSet(&privs_local, PRIV_MODE_LCHAN);
FlagSet(&privs_local, PRIV_SHOW_INVIS);
FlagSet(&privs_local, PRIV_SHOW_ALL_INVIS);
FlagSet(&privs_local, PRIV_LOCAL_KILL);
FlagSet(&privs_local, PRIV_REHASH);
FlagSet(&privs_local, PRIV_LOCAL_GLINE);
FlagSet(&privs_local, PRIV_LOCAL_JUPE);
FlagSet(&privs_local, PRIV_LOCAL_OPMODE);
FlagSet(&privs_local, PRIV_WHOX);
FlagSet(&privs_local, PRIV_DISPLAY);
FlagSet(&privs_local, PRIV_FORCE_LOCAL_OPMODE);
FlagSet(&privs_local, PRIV_LOCAL_SHUN);
FlagSet(&privs_local, PRIV_LOCAL_ZLINE);
privs_defaults_set = 1;
}
/* Decide whether to use global or local oper defaults. */
if (FlagHas(&oper->privs_dirty, PRIV_PROPAGATE))
defaults = FlagHas(&oper->privs, PRIV_PROPAGATE) ? &privs_global : &privs_local;
else if (FlagHas(&oper->conn_class->privs_dirty, PRIV_PROPAGATE))
defaults = FlagHas(&oper->conn_class->privs, PRIV_PROPAGATE) ? &privs_global : &privs_local;
else {
assert(0 && "Oper has no propagation and neither does connection class");
return;
}
/* For each feature, figure out whether it comes from the operator
* conf, the connection class conf, or the defaults, then apply it.
*/
for (priv = 0; priv < PRIV_LAST_PRIV; ++priv)
{
/* Figure out most applicable definition for the privilege. */
if (FlagHas(&oper->privs_dirty, priv))
source = &oper->privs;
else if (FlagHas(&oper->conn_class->privs_dirty, priv))
source = &oper->conn_class->privs;
else
source = defaults;
/* Set it if necessary (privileges were already cleared). */
if (FlagHas(source, priv))
SetPriv(client, priv);
}
/* This should be handled in the config, but lets be sure... */
if (HasPriv(client, PRIV_PROPAGATE))
{
/* force propagating opers to display */
SetPriv(client, PRIV_DISPLAY);
}
else
{
/* if they don't propagate oper status, prevent desyncs */
ClrPriv(client, PRIV_KILL);
ClrPriv(client, PRIV_GLINE);
ClrPriv(client, PRIV_JUPE);
ClrPriv(client, PRIV_SHUN);
ClrPriv(client, PRIV_ZLINE);
ClrPriv(client, PRIV_OPMODE);
ClrPriv(client, PRIV_BADCHAN);
}
if (MyUser(client))
ClrPriv(client, PRIV_REMOTE);
client_sendtoserv_privs(client);
}
/** Array mapping privilege values to names and vice versa. */
static struct {
char *name; /**< Name of privilege. */
unsigned int priv; /**< Enumeration value of privilege */
} privtab[] = {
/** Helper macro to define an array entry for a privilege. */
#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(LIST_CHAN),
P(FORCE_OPMODE), P(FORCE_LOCAL_OPMODE), P(APASS_OPMODE), P(CHECK),
P(WHOIS_NOTICE), P(HIDE_OPER), P(HIDE_CHANNELS), P(HIDE_IDLE),
P(ADMIN), P(XTRAOP), P(SERVICE), P(REMOTE),
P(SHUN), P(LOCAL_SHUN), P(WIDE_SHUN), P(FREEFORM),
P(REMOTEREHASH), P(REMOVE), P(LOCAL_ZLINE), P(ZLINE),
P(WIDE_ZLINE), P(TEMPSHUN),
#undef P
{ 0, 0 }
};
/** 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;
}
void client_check_privs(struct Client *client, struct Client *replyto)
{
char outbuf[BUFSIZE];
int i = 0;
static char privbufp[BUFSIZE] = "";
memset(&privbufp, 0, BUFSIZE);
for (i = 0; privtab[i].name; i++) {
if (HasPriv(client, privtab[i].priv)) {
if (strlen(privbufp) + strlen(privtab[i].name) + 2 > 70) {
ircd_snprintf(0, outbuf, sizeof(outbuf), " Privileges:: %s", privbufp);
send_reply(replyto, RPL_DATASTR, outbuf);
memset(&privbufp, 0, BUFSIZE);
}
strcat(privbufp, privtab[i].name);
strcat(privbufp, " ");
}
}
if (strlen(privbufp) > 0) {
ircd_snprintf(0, outbuf, sizeof(outbuf), " Privileges:: %s", privbufp);
send_reply(replyto, RPL_DATASTR, outbuf);
}
}
void client_send_privs(struct Client *from, struct Client *to, struct Client *client)
{
int i, p;
int mlen = NICKLEN + 5 + NICKLEN + 7;
static char privbuf[BUFSIZE] = "";
memset(&privbuf, 0, BUFSIZE);
p = 1; /* Count the victim too */
for (i = 0; privtab[i].name; i++) {
if (HasPriv(client, privtab[i].priv)) {
if ((p >= MAXPARA) || (strlen(privbuf) + strlen(privtab[i].name) + 1 > BUFSIZE - mlen)) {
p = 1;
sendcmdto_one(from, CMD_PRIVS, to, "%C %s", client, privbuf);
memset(&privbuf, 0, BUFSIZE);
}
p++;
strcat(privbuf, privtab[i].name);
strcat(privbuf, " ");
}
}
if (strlen(privbuf) > 0) {
sendcmdto_one(from, CMD_PRIVS, to, "%C %s", client, privbuf);
}
}
void client_sendtoserv_privs(struct Client *client)
{
int i, p;
int mlen = NICKLEN + 5 + NICKLEN + 7;
static char privbuf[BUFSIZE] = "";
memset(&privbuf, 0, BUFSIZE);
p = 1;
for (i = 0; privtab[i].name; i++) {
if (HasPriv(client, privtab[i].priv)) {
if ((p >= MAXPARA) || (strlen(privbuf) + strlen(privtab[i].name) + 1 > BUFSIZE - mlen)) {
p = 1;
sendcmdto_serv_butone(&me, CMD_PRIVS, client, "%C %s", client, privbuf);
memset(&privbuf, 0, BUFSIZE);
}
p++;
strcat(privbuf, privtab[i].name);
strcat(privbuf, " ");
}
}
if (strlen(privbuf) > 0) {
sendcmdto_serv_butone(&me, CMD_PRIVS, client, "%C %s", client, privbuf);
}
}
char *client_print_privs(struct Client *client)
{
int i;
static char privbufp[BUFSIZE] = "";
size_t pos = 0;
size_t namelen;
privbufp[0] = '\0';
for (i = 0; privtab[i].name; i++) {
if (HasPriv(client, privtab[i].priv)) {
namelen = strlen(privtab[i].name);
/* Check bounds before appending: name + space + null terminator */
if (pos + namelen + 2 > sizeof(privbufp))
break;
memcpy(privbufp + pos, privtab[i].name, namelen);
pos += namelen;
privbufp[pos++] = ' ';
}
}
privbufp[pos] = '\0';
return (char *)privbufp;
}
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) {
SetPriv(who, privtab[i].priv);
} else if (what == PRIV_DEL) {
ClrPriv(who, privtab[i].priv);
}
}
return 0;
}
int clear_privs(struct Client *who) {
int i = 0;
assert(0 != who);
for (i = 0; privtab[i].name; i++)
ClrPriv(who, privtab[i].priv);
return 0;
}
void client_check_marks(struct Client *client, struct Client *replyto)
{
char outbuf[BUFSIZE];
static char markbufp[BUFSIZE] = "";
struct SLink* dp;
if (!IsMarked(client))
return;
memset(&markbufp, 0, BUFSIZE);
for (dp = cli_marks(client); dp; dp = dp->next) {
if (markbufp[0] && strlen(markbufp) + strlen(dp->value.cp) + 4 > 70) {
ircd_snprintf(0, outbuf, sizeof(outbuf), " Marks:: %s", markbufp);
send_reply(replyto, RPL_DATASTR, outbuf);
memset(&markbufp, 0, BUFSIZE);
}
if (markbufp[0])
strcat(markbufp, ", ");
strcat(markbufp, dp->value.cp);
}
if (markbufp[0]) {
ircd_snprintf(0, outbuf, sizeof(outbuf), " Marks:: %s", markbufp);
send_reply(replyto, RPL_DATASTR, outbuf);
}
}
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