8.2.x/modules/m_trace.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2015 ircd-hybrid 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

/*! \file m_trace.c
 * \brief Includes required functions for processing the TRACE command.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "numeric.h"
#include "server.h"
#include "send.h"
#include "parse.h"
#include "modules.h"
#include "conf.h"
#include "conf_class.h"


static void do_actual_trace(struct Client *, int, char *[]);
static void report_this_status(struct Client *, const struct Client *);

static void
trace_get_dependent(unsigned int *const server,
                    unsigned int *const client, const struct Client *target_p)
{
  const dlink_node *node = NULL;

  (*server)++;
  (*client) += dlink_list_length(&target_p->serv->client_list);

  DLINK_FOREACH(node, target_p->serv->server_list.head)
    trace_get_dependent(server, client, node->data);
}

/*
 * m_trace()
 *
 *      parv[0] = command
 *      parv[1] = target client/server to trace
 */
static int
m_trace(struct Client *source_p, int parc, char *parv[])
{
  const char *name = NULL;

  if (parc > 1)
    name = parv[1];
  else
    name = me.name;

  sendto_one_numeric(source_p, &me, RPL_ENDOFTRACE, name);
  return 0;
}

/* mo_trace()
 *      parv[0] = command
 *      parv[1] = servername
 */
static int
mo_trace(struct Client *source_p, int parc, char *parv[])
{
  dlink_node *node = NULL;
  const char *name = NULL;

  if (parc > 2)
    if (hunt_server(source_p, ":%s TRACE %s :%s", 2, parc, parv) != HUNTED_ISME)
      return 0;

  if (parc > 1)
    name = parv[1];
  else
    name = me.name;

  switch (hunt_server(source_p, ":%s TRACE :%s", 1, parc, parv))
  {
    case HUNTED_PASS: /* note: gets here only if parv[1] exists */
    {
      struct Client *ac2ptr = NULL;

      if ((ac2ptr = hash_find_client(name)) == NULL)
      {
        DLINK_FOREACH(node, global_client_list.head)
        {
          ac2ptr = node->data;

          if (!match(name, ac2ptr->name))
            break;
          else
            ac2ptr = NULL;
        }
      }

      if (ac2ptr)
        sendto_one_numeric(source_p, &me, RPL_TRACELINK,
                           ircd_version, name, ac2ptr->from->name);
      else
        sendto_one_numeric(source_p, &me, RPL_TRACELINK,
                           ircd_version, name, "ac2ptr_is_NULL!!");
      return 0;
    }

    case HUNTED_ISME:
      do_actual_trace(source_p, parc, parv);
      break;
    default:
      return 0;
  }

  return 0;
}

/*
** ms_trace
**      parv[0] = command
**      parv[1] = servername
*/
static int
ms_trace(struct Client *source_p, int parc, char *parv[])
{
  if (hunt_server(source_p, ":%s TRACE %s :%s", 2, parc, parv) != HUNTED_ISME)
    return 0;

  if (HasUMode(source_p, UMODE_OPER))
    return mo_trace(source_p, parc, parv);
  return 0;
}

static void
do_actual_trace(struct Client *source_p, int parc, char *parv[])
{
  const struct Client *target_p = NULL;
  int doall = 0;
  int wilds, dow;
  dlink_node *node;
  const char *name;

  assert(HasUMode(source_p, UMODE_OPER));

  if (parc > 1)
    name = parv[1];
  else
    name = me.name;

  sendto_realops_flags(UMODE_SPY, L_ALL, SEND_NOTICE,
                       "TRACE requested by %s (%s@%s) [%s]",
                       source_p->name, source_p->username,
                       source_p->host, source_p->servptr->name);

  if (!match(name, me.name))
    doall = 1;
  else if (!MyClient(source_p) && !strcmp(name, me.id))
  {
    doall = 1;
    name = me.name;
  }

  wilds = !parv[1] || has_wildcards(name);
  dow = wilds || doall;

  if (!dow)  /* lets also do this for opers tracing nicks */
  {
    if ((target_p = hash_find_client(name)) && IsClient(target_p))
      report_this_status(source_p, target_p);

    sendto_one_numeric(source_p, &me, RPL_ENDOFTRACE, name);
    return;
  }

  /* report all direct connections */
  DLINK_FOREACH(node, local_client_list.head)
  {
    target_p = node->data;

    if (!doall && wilds && match(name, target_p->name))
      continue;
    if (!dow && irccmp(name, target_p->name))
      continue;

    report_this_status(source_p, target_p);
  }

  DLINK_FOREACH(node, local_server_list.head)
  {
    target_p = node->data;

    if (!doall && wilds && match(name, target_p->name))
      continue;
    if (!dow && irccmp(name, target_p->name))
      continue;

    report_this_status(source_p, target_p);
  }

  /* This section is to report the unknowns */
  DLINK_FOREACH(node, unknown_list.head)
  {
    target_p = node->data;

    if (!doall && wilds && match(name, target_p->name))
      continue;
    if (!dow && irccmp(name, target_p->name))
      continue;

    report_this_status(source_p, target_p);
  }

  DLINK_FOREACH(node, class_get_list()->head)
  {
    const struct ClassItem *class = node->data;

    if (class->ref_count > 0)
      sendto_one_numeric(source_p, &me, RPL_TRACECLASS, class->name, class->ref_count);
  }

  sendto_one_numeric(source_p, &me, RPL_ENDOFTRACE, name);
}

/* 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 void
report_this_status(struct Client *source_p, const struct Client *target_p)
{
  const char *name;
  const char *class_name;

  name = get_client_name(target_p, HIDE_IP);
  class_name = get_client_class(&target_p->connection->confs);

  switch (target_p->status)
  {
    case STAT_CONNECTING:
      sendto_one_numeric(source_p, &me, RPL_TRACECONNECTING, class_name,
                         HasUMode(source_p, UMODE_ADMIN) ? name : target_p->name);
      break;
    case STAT_HANDSHAKE:
      sendto_one_numeric(source_p, &me, RPL_TRACEHANDSHAKE, class_name,
                         HasUMode(source_p, UMODE_ADMIN) ? name : target_p->name);
      break;
    case STAT_ME:
      break;
    case STAT_UNKNOWN:
      sendto_one_numeric(source_p, &me, RPL_TRACEUNKNOWN, class_name,
                         name, target_p->sockhost,
                         CurrentTime - target_p->connection->firsttime);
      break;
    case STAT_CLIENT:
      if (HasUMode(target_p, UMODE_OPER))
        sendto_one_numeric(source_p, &me, RPL_TRACEOPERATOR, class_name, name,
                           target_p->sockhost,
                           CurrentTime - target_p->connection->lasttime,
                           client_get_idle_time(source_p, target_p));
      else
        sendto_one_numeric(source_p, &me, RPL_TRACEUSER, class_name, name,
                           target_p->sockhost,
                           CurrentTime - target_p->connection->lasttime,
                           client_get_idle_time(source_p, target_p));
      break;
    case STAT_SERVER:
    {
      unsigned int clients = 0;
      unsigned int servers = 0;

      trace_get_dependent(&servers, &clients, target_p);

      if (!HasUMode(source_p, UMODE_ADMIN))
        name = get_client_name(target_p, MASK_IP);

      sendto_one_numeric(source_p, &me, RPL_TRACESERVER, class_name, servers,
                         clients, name, *(target_p->serv->by) ?
                         target_p->serv->by : "*", "*",
                         me.name, CurrentTime - target_p->connection->lasttime);
      break;
    }

    default: /* ...we actually shouldn't come here... --msa */
      sendto_one_numeric(source_p, &me, RPL_TRACENEWTYPE, name);
      break;
  }
}

static struct Message trace_msgtab =
{
  .cmd = "TRACE",
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_trace,
  .handlers[SERVER_HANDLER] = ms_trace,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = mo_trace
};

static void
module_init(void)
{
  mod_add_cmd(&trace_msgtab);
}

static void
module_exit(void)
{
  mod_del_cmd(&trace_msgtab);
}

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	6444
Committed:	Fri Aug 28 18:29:58 2015 UTC (9 years, 11 months ago) by michael
Content type:	text/x-csrc
File size:	8789 byte(s)
Log Message:	- m_trace.c: allow remote operators to request a full client list; various other cleanups
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2015 ircd-hybrid development team
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	* USA
20	*/
21
22	/*! \file m_trace.c
23	* \brief Includes required functions for processing the TRACE command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "list.h"
29	#include "client.h"
30	#include "hash.h"
31	#include "irc_string.h"
32	#include "ircd.h"
33	#include "numeric.h"
34	#include "server.h"
35	#include "send.h"
36	#include "parse.h"
37	#include "modules.h"
38	#include "conf.h"
39	#include "conf_class.h"
40
41
42	static void do_actual_trace(struct Client , int, char []);
43	static void report_this_status(struct Client , const struct Client );
44
45	static void
46	trace_get_dependent(unsigned int *const server,
47	unsigned int const client, const struct Client target_p)
48	{
49	const dlink_node *node = NULL;
50
51	(*server)++;
52	(*client) += dlink_list_length(&target_p->serv->client_list);
53
54	DLINK_FOREACH(node, target_p->serv->server_list.head)
55	trace_get_dependent(server, client, node->data);
56	}
57
58	/*
59	* m_trace()
60	*
61	* parv[0] = command
62	* parv[1] = target client/server to trace
63	*/
64	static int
65	m_trace(struct Client source_p, int parc, char parv[])
66	{
67	const char *name = NULL;
68
69	if (parc > 1)
70	name = parv[1];
71	else
72	name = me.name;
73
74	sendto_one_numeric(source_p, &me, RPL_ENDOFTRACE, name);
75	return 0;
76	}
77
78	/* mo_trace()
79	* parv[0] = command
80	* parv[1] = servername
81	*/
82	static int
83	mo_trace(struct Client source_p, int parc, char parv[])
84	{
85	dlink_node *node = NULL;
86	const char *name = NULL;
87
88	if (parc > 2)
89	if (hunt_server(source_p, ":%s TRACE %s :%s", 2, parc, parv) != HUNTED_ISME)
90	return 0;
91
92	if (parc > 1)
93	name = parv[1];
94	else
95	name = me.name;
96
97	switch (hunt_server(source_p, ":%s TRACE :%s", 1, parc, parv))
98	{
99	case HUNTED_PASS: /* note: gets here only if parv[1] exists */
100	{
101	struct Client *ac2ptr = NULL;
102
103	if ((ac2ptr = hash_find_client(name)) == NULL)
104	{
105	DLINK_FOREACH(node, global_client_list.head)
106	{
107	ac2ptr = node->data;
108
109	if (!match(name, ac2ptr->name))
110	break;
111	else
112	ac2ptr = NULL;
113	}
114	}
115
116	if (ac2ptr)
117	sendto_one_numeric(source_p, &me, RPL_TRACELINK,
118	ircd_version, name, ac2ptr->from->name);
119	else
120	sendto_one_numeric(source_p, &me, RPL_TRACELINK,
121	ircd_version, name, "ac2ptr_is_NULL!!");
122	return 0;
123	}
124
125	case HUNTED_ISME:
126	do_actual_trace(source_p, parc, parv);
127	break;
128	default:
129	return 0;
130	}
131
132	return 0;
133	}
134
135	/*
136	** ms_trace
137	** parv[0] = command
138	** parv[1] = servername
139	*/
140	static int
141	ms_trace(struct Client source_p, int parc, char parv[])
142	{
143	if (hunt_server(source_p, ":%s TRACE %s :%s", 2, parc, parv) != HUNTED_ISME)
144	return 0;
145
146	if (HasUMode(source_p, UMODE_OPER))
147	return mo_trace(source_p, parc, parv);
148	return 0;
149	}
150
151	static void
152	do_actual_trace(struct Client source_p, int parc, char parv[])
153	{
154	const struct Client *target_p = NULL;
155	int doall = 0;
156	int wilds, dow;
157	dlink_node *node;
158	const char *name;
159
160	assert(HasUMode(source_p, UMODE_OPER));
161
162	if (parc > 1)
163	name = parv[1];
164	else
165	name = me.name;
166
167	sendto_realops_flags(UMODE_SPY, L_ALL, SEND_NOTICE,
168	"TRACE requested by %s (%s@%s) [%s]",
169	source_p->name, source_p->username,
170	source_p->host, source_p->servptr->name);
171
172	if (!match(name, me.name))
173	doall = 1;
174	else if (!MyClient(source_p) && !strcmp(name, me.id))
175	{
176	doall = 1;
177	name = me.name;
178	}
179
180	wilds = !parv[1] \|\| has_wildcards(name);
181	dow = wilds \|\| doall;
182
183	if (!dow) /* lets also do this for opers tracing nicks */
184	{
185	if ((target_p = hash_find_client(name)) && IsClient(target_p))
186	report_this_status(source_p, target_p);
187
188	sendto_one_numeric(source_p, &me, RPL_ENDOFTRACE, name);
189	return;
190	}
191
192	/* report all direct connections */
193	DLINK_FOREACH(node, local_client_list.head)
194	{
195	target_p = node->data;
196
197	if (!doall && wilds && match(name, target_p->name))
198	continue;
199	if (!dow && irccmp(name, target_p->name))
200	continue;
201
202	report_this_status(source_p, target_p);
203	}
204
205	DLINK_FOREACH(node, local_server_list.head)
206	{
207	target_p = node->data;
208
209	if (!doall && wilds && match(name, target_p->name))
210	continue;
211	if (!dow && irccmp(name, target_p->name))
212	continue;
213
214	report_this_status(source_p, target_p);
215	}
216
217	/* This section is to report the unknowns */
218	DLINK_FOREACH(node, unknown_list.head)
219	{
220	target_p = node->data;
221
222	if (!doall && wilds && match(name, target_p->name))
223	continue;
224	if (!dow && irccmp(name, target_p->name))
225	continue;
226
227	report_this_status(source_p, target_p);
228	}
229
230	DLINK_FOREACH(node, class_get_list()->head)
231	{
232	const struct ClassItem *class = node->data;
233
234	if (class->ref_count > 0)
235	sendto_one_numeric(source_p, &me, RPL_TRACECLASS, class->name, class->ref_count);
236	}
237
238	sendto_one_numeric(source_p, &me, RPL_ENDOFTRACE, name);
239	}
240
241	/* report_this_status()
242	*
243	* inputs - pointer to client to report to
244	* - pointer to client to report about
245	* output - counter of number of hits
246	* side effects - NONE
247	*/
248	static void
249	report_this_status(struct Client source_p, const struct Client target_p)
250	{
251	const char *name;
252	const char *class_name;
253
254	name = get_client_name(target_p, HIDE_IP);
255	class_name = get_client_class(&target_p->connection->confs);
256
257	switch (target_p->status)
258	{
259	case STAT_CONNECTING:
260	sendto_one_numeric(source_p, &me, RPL_TRACECONNECTING, class_name,
261	HasUMode(source_p, UMODE_ADMIN) ? name : target_p->name);
262	break;
263	case STAT_HANDSHAKE:
264	sendto_one_numeric(source_p, &me, RPL_TRACEHANDSHAKE, class_name,
265	HasUMode(source_p, UMODE_ADMIN) ? name : target_p->name);
266	break;
267	case STAT_ME:
268	break;
269	case STAT_UNKNOWN:
270	sendto_one_numeric(source_p, &me, RPL_TRACEUNKNOWN, class_name,
271	name, target_p->sockhost,
272	CurrentTime - target_p->connection->firsttime);
273	break;
274	case STAT_CLIENT:
275	if (HasUMode(target_p, UMODE_OPER))
276	sendto_one_numeric(source_p, &me, RPL_TRACEOPERATOR, class_name, name,
277	target_p->sockhost,
278	CurrentTime - target_p->connection->lasttime,
279	client_get_idle_time(source_p, target_p));
280	else
281	sendto_one_numeric(source_p, &me, RPL_TRACEUSER, class_name, name,
282	target_p->sockhost,
283	CurrentTime - target_p->connection->lasttime,
284	client_get_idle_time(source_p, target_p));
285	break;
286	case STAT_SERVER:
287	{
288	unsigned int clients = 0;
289	unsigned int servers = 0;
290
291	trace_get_dependent(&servers, &clients, target_p);
292
293	if (!HasUMode(source_p, UMODE_ADMIN))
294	name = get_client_name(target_p, MASK_IP);
295
296	sendto_one_numeric(source_p, &me, RPL_TRACESERVER, class_name, servers,
297	clients, name, *(target_p->serv->by) ?
298	target_p->serv->by : "", "",
299	me.name, CurrentTime - target_p->connection->lasttime);
300	break;
301	}
302
303	default: /* ...we actually shouldn't come here... --msa */
304	sendto_one_numeric(source_p, &me, RPL_TRACENEWTYPE, name);
305	break;
306	}
307	}
308
309	static struct Message trace_msgtab =
310	{
311	.cmd = "TRACE",
312	.args_max = MAXPARA,
313	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
314	.handlers[CLIENT_HANDLER] = m_trace,
315	.handlers[SERVER_HANDLER] = ms_trace,
316	.handlers[ENCAP_HANDLER] = m_ignore,
317	.handlers[OPER_HANDLER] = mo_trace
318	};
319
320	static void
321	module_init(void)
322	{
323	mod_add_cmd(&trace_msgtab);
324	}
325
326	static void
327	module_exit(void)
328	{
329	mod_del_cmd(&trace_msgtab);
330	}
331
332	struct module module_entry =
333	{
334	.version = "$Revision$",
335	.modinit = module_init,
336	.modexit = module_exit,
337	};