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elemental-ircd/modules/m_trace.c

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/*
* ircd-ratbox: A slightly useful ircd.
* m_trace.c: Traces a path to a client/server.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* 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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* $Id: m_trace.c 3183 2007-02-01 01:07:42Z jilles $
*/
#include "stdinc.h"
#include "class.h"
#include "hook.h"
#include "client.h"
#include "hash.h"
#include "common.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "numeric.h"
#include "s_serv.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
static int m_trace(struct Client *, struct Client *, int, const char **);
static void trace_spy(struct Client *, struct Client *);
struct Message trace_msgtab = {
"TRACE", 0, 0, 0, MFLG_SLOW,
{mg_unreg, {m_trace, 0}, {m_trace, 0}, mg_ignore, mg_ignore, {m_trace, 0}}
};
int doing_trace_hook;
mapi_clist_av1 trace_clist[] = { &trace_msgtab, NULL };
mapi_hlist_av1 trace_hlist[] = {
{ "doing_trace", &doing_trace_hook },
{ NULL, NULL }
};
DECLARE_MODULE_AV1(trace, NULL, NULL, trace_clist, trace_hlist, NULL, "$Revision: 3183 $");
static void count_downlinks(struct Client *server_p, int *pservcount, int *pusercount);
static int report_this_status(struct Client *source_p, struct Client *target_p, int dow);
/*
* m_trace
* parv[0] = sender prefix
* parv[1] = servername
*/
static int
m_trace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
struct Client *target_p = NULL;
struct Class *cltmp;
const char *tname;
int doall = 0;
int cnt = 0, wilds, dow;
rb_dlink_node *ptr;
if(parc > 1)
{
tname = parv[1];
if(parc > 2)
{
if(hunt_server(client_p, source_p, ":%s TRACE %s :%s", 2, parc, parv) !=
HUNTED_ISME)
return 0;
}
}
else
tname = me.name;
/* if we have 3 parameters, then the command is directed at us. So
* we shouldnt be forwarding it anywhere.
*/
if(parc < 3)
{
switch (hunt_server(client_p, source_p, ":%s TRACE :%s", 1, parc, parv))
{
case HUNTED_PASS: /* note: gets here only if parv[1] exists */
{
struct Client *ac2ptr;
if(MyClient(source_p))
ac2ptr = find_named_client(tname);
else
ac2ptr = find_client(tname);
if(ac2ptr == NULL)
{
RB_DLINK_FOREACH(ptr, global_client_list.head)
{
ac2ptr = ptr->data;
if(match(tname, ac2ptr->name))
break;
else
ac2ptr = NULL;
}
}
/* giving this out with flattened links defeats the
* object --fl
*/
if(IsOper(source_p) || IsExemptShide(source_p) ||
!ConfigServerHide.flatten_links)
sendto_one_numeric(source_p, RPL_TRACELINK,
form_str(RPL_TRACELINK),
ircd_version,
ac2ptr ? ac2ptr->name : tname,
ac2ptr ? ac2ptr->from->name : "EEK!");
return 0;
}
case HUNTED_ISME:
break;
default:
return 0;
}
}
if(match(tname, me.name))
{
doall = 1;
}
/* if theyre tracing our SID, we need to move tname to our name so
* we dont give the sid in ENDOFTRACE
*/
else if(!MyClient(source_p) && !strcmp(tname, me.id))
{
doall = 1;
tname = me.name;
}
wilds = strchr(tname, '*') || strchr(tname, '?');
dow = wilds || doall;
/* specific trace */
if(dow == 0)
{
if(MyClient(source_p) || parc > 2)
target_p = find_named_person(tname);
else
target_p = find_person(tname);
/* tname could be pointing to an ID at this point, so reset
* it to target_p->name if we have a target --fl
*/
if(target_p != NULL)
{
report_this_status(source_p, target_p, 0);
tname = target_p->name;
}
trace_spy(source_p, target_p);
sendto_one_numeric(source_p, RPL_ENDOFTRACE,
form_str(RPL_ENDOFTRACE), tname);
return 0;
}
trace_spy(source_p, NULL);
/* give non-opers a limited trace output of themselves (if local),
* opers and servers (if no shide) --fl
*/
if(!IsOper(source_p))
{
if(MyClient(source_p))
{
if(doall || (wilds && match(tname, source_p->name)))
report_this_status(source_p, source_p, 0);
}
RB_DLINK_FOREACH(ptr, local_oper_list.head)
{
target_p = ptr->data;
if(!doall && wilds && (match(tname, target_p->name) == 0))
continue;
report_this_status(source_p, target_p, 0);
}
if (IsExemptShide(source_p) || !ConfigServerHide.flatten_links)
{
RB_DLINK_FOREACH(ptr, serv_list.head)
{
target_p = ptr->data;
if(!doall && wilds && !match(tname, target_p->name))
continue;
report_this_status(source_p, target_p, 0);
}
}
sendto_one_numeric(source_p, RPL_ENDOFTRACE,
form_str(RPL_ENDOFTRACE), tname);
return 0;
}
/* source_p is opered */
/* report all direct connections */
RB_DLINK_FOREACH(ptr, lclient_list.head)
{
target_p = ptr->data;
/* dont show invisible users to remote opers */
if(IsInvisible(target_p) && dow && !MyConnect(source_p) && !IsOper(target_p))
continue;
if(!doall && wilds && !match(tname, target_p->name))
continue;
cnt = report_this_status(source_p, target_p, dow);
}
RB_DLINK_FOREACH(ptr, serv_list.head)
{
target_p = ptr->data;
if(!doall && wilds && !match(tname, target_p->name))
continue;
cnt = report_this_status(source_p, target_p, dow);
}
if(MyConnect(source_p))
{
RB_DLINK_FOREACH(ptr, unknown_list.head)
{
target_p = ptr->data;
if(!doall && wilds && !match(tname, target_p->name))
continue;
cnt = report_this_status(source_p, target_p, dow);
}
}
if(!cnt)
{
sendto_one_numeric(source_p, ERR_NOSUCHSERVER, form_str(ERR_NOSUCHSERVER),
tname);
/* let the user have some idea that its at the end of the
* trace
*/
sendto_one_numeric(source_p, RPL_ENDOFTRACE,
form_str(RPL_ENDOFTRACE), tname);
return 0;
}
if(doall)
{
RB_DLINK_FOREACH(ptr, class_list.head)
{
cltmp = ptr->data;
if(CurrUsers(cltmp) > 0)
sendto_one_numeric(source_p, RPL_TRACECLASS,
form_str(RPL_TRACECLASS),
ClassName(cltmp), CurrUsers(cltmp));
}
}
sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), tname);
return 0;
}
/*
* count_downlinks
*
* inputs - pointer to server to count
* - pointers to server and user count
* output - NONE
* side effects - server and user counts are added to given values
*/
static void
count_downlinks(struct Client *server_p, int *pservcount, int *pusercount)
{
rb_dlink_node *ptr;
(*pservcount)++;
*pusercount += rb_dlink_list_length(&server_p->serv->users);
RB_DLINK_FOREACH(ptr, server_p->serv->servers.head)
{
count_downlinks(ptr->data, pservcount, pusercount);
}
}
/*
* report_this_status
*
* inputs - pointer to client to report to
* - pointer to client to report about
* output - counter of number of hits
* side effects - NONE
*/
static int
report_this_status(struct Client *source_p, struct Client *target_p,
int dow)
{
const char *name;
const char *class_name;
char ip[HOSTIPLEN];
int cnt = 0;
/* sanity check - should never happen */
if(!MyConnect(target_p))
return 0;
inetntop_sock((struct sockaddr *)&target_p->localClient->ip, ip, sizeof(ip));
class_name = get_client_class(target_p);
if(IsAnyServer(target_p))
name = get_server_name(target_p, HIDE_IP);
else
name = get_client_name(target_p, HIDE_IP);
switch (target_p->status)
{
case STAT_CONNECTING:
sendto_one_numeric(source_p, RPL_TRACECONNECTING,
form_str(RPL_TRACECONNECTING),
class_name, name);
cnt++;
break;
case STAT_HANDSHAKE:
sendto_one_numeric(source_p, RPL_TRACEHANDSHAKE,
form_str(RPL_TRACEHANDSHAKE),
class_name, name);
cnt++;
break;
case STAT_ME:
break;
case STAT_UNKNOWN:
/* added time -Taner */
sendto_one_numeric(source_p, RPL_TRACEUNKNOWN,
form_str(RPL_TRACEUNKNOWN),
class_name, name, ip,
CurrentTime - target_p->localClient->firsttime);
cnt++;
break;
case STAT_CLIENT:
/* Only opers see users if there is a wildcard
* but anyone can see all the opers.
*/
if((IsOper(source_p) &&
(MyClient(source_p) || !(dow && IsInvisible(target_p))))
|| !dow || IsOper(target_p) || (source_p == target_p))
{
if(IsOper(target_p))
sendto_one_numeric(source_p, RPL_TRACEOPERATOR,
form_str(RPL_TRACEOPERATOR),
class_name, name,
show_ip(source_p, target_p) ? ip : "255.255.255.255",
CurrentTime - target_p->localClient->lasttime,
CurrentTime - target_p->localClient->last);
else
sendto_one_numeric(source_p, RPL_TRACEUSER,
form_str(RPL_TRACEUSER),
class_name, name,
show_ip(source_p, target_p) ? ip : "255.255.255.255",
CurrentTime - target_p->localClient->lasttime,
CurrentTime - target_p->localClient->last);
cnt++;
}
break;
case STAT_SERVER:
{
int usercount = 0;
int servcount = 0;
count_downlinks(target_p, &servcount, &usercount);
sendto_one_numeric(source_p, RPL_TRACESERVER, form_str(RPL_TRACESERVER),
class_name, servcount, usercount, name,
*(target_p->serv->by) ? target_p->serv->by : "*", "*",
me.name, CurrentTime - target_p->localClient->lasttime);
cnt++;
}
break;
default: /* ...we actually shouldn't come here... --msa */
sendto_one_numeric(source_p, RPL_TRACENEWTYPE,
form_str(RPL_TRACENEWTYPE),
me.name, source_p->name, name);
cnt++;
break;
}
return (cnt);
}
/* trace_spy()
*
* input - pointer to client
* output - none
* side effects - hook event doing_trace is called
*/
static void
trace_spy(struct Client *source_p, struct Client *target_p)
{
hook_data_client hdata;
hdata.client = source_p;
hdata.target = target_p;
call_hook(doing_trace_hook, &hdata);
}
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