8.0.x/modules/m_webirc.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_webirc.c: Makes CGI:IRC users appear as coming from their real host
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 2002-2006 ircd-ratbox development team
 *  Copyright (C) 1996-2012 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

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

/*
 * Usage:
 *
 * auth {
 *   user = "webirc@<cgiirc ip>"; # if identd used, put ident username instead
 *   password = "<password>"; # encryption possible
 *   spoof = "webirc."
 *   class = "users";
 *   encrypted = yes; # [Using encryption is highly recommended]
 * };
 *
 * Possible flags:
 *   kline_exempt - k/g lines on the cgiirc ip are ignored
 *   gline_exempt - glines on the cgiirc ip are ignored
 *
 * dlines are checked on the cgiirc ip (of course).
 * k/d/g/x lines, auth blocks, user limits, etc are checked using the
 * real host/ip.
 *
 * The password should be specified unencrypted in webirc_password in
 * cgiirc.config
 */

static int
invalid_hostname(const char *hostname)
{
  const char *p = hostname;
  unsigned int has_sep = 0;

  assert(p != NULL);

  if (*p == '.' || *p == ':')
    return 1;

  for (; *p; ++p)
  {
    if (!IsHostChar(*p))
      return 1;
    if (*p == '.' || *p == ':')
      ++has_sep;
  }

  return !has_sep;
}

/*
 * mr_webirc
 *      parv[0] = sender prefix
 *      parv[1] = password
 *      parv[2] = fake username (we ignore this)
 *      parv[3] = fake hostname 
 *      parv[4] = fake ip
 */
static void
mr_webirc(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
  struct AccessItem *aconf = NULL;
  struct ConfItem *conf = NULL;
  struct addrinfo hints, *res;

  assert(source_p == client_p);

  if (invalid_hostname(parv[4]))
  {
    sendto_one(source_p, ":%s NOTICE %s :CGI:IRC: Invalid IP", me.name,
               source_p->name[0] ? source_p->name : "*");
    return;
  }

  aconf = find_address_conf(source_p->host,
                            IsGotId(source_p) ? source_p->username : "webirc",
                            &source_p->localClient->ip,
                            source_p->localClient->aftype, parv[1],
                            source_p->localClient->country_id);
  if (aconf == NULL || !IsConfClient(aconf))
    return;

  conf = unmap_conf_item(aconf);

  if (!IsConfDoSpoofIp(aconf) || irccmp(conf->name, "webirc."))
  {
    sendto_one(source_p, ":%s NOTICE %s :Not a CGI:IRC auth block", me.name,
               source_p->name[0] ? source_p->name : "*");
    return;
  }

  if (EmptyString(aconf->passwd))
  {
    sendto_one(source_p, ":%s NOTICE %s :CGI:IRC auth blocks must have a password",
               me.name, source_p->name[0] ? source_p->name : "*");
    return;
  }

  if (!match_conf_password(parv[1], aconf))
  {
    sendto_one(source_p, ":%s NOTICE %s :CGI:IRC password incorrect",
               me.name, source_p->name[0] ? source_p->name : "*");
    return;
  }

  memset(&hints, 0, sizeof(hints));

  hints.ai_family   = AF_UNSPEC;
  hints.ai_socktype = SOCK_STREAM;
  hints.ai_flags    = AI_PASSIVE | AI_NUMERICHOST;

  if (getaddrinfo(parv[4], NULL, &hints, &res))
  {

    sendto_one(source_p, ":%s NOTICE %s :Invalid CGI:IRC IP %s", me.name,
               source_p->name[0] ? source_p->name : "*", parv[4]);
    return;
  }

  assert(res != NULL);

  memcpy(&source_p->localClient->ip, res->ai_addr, res->ai_addrlen);
  source_p->localClient->ip.ss_len = res->ai_addrlen;
  source_p->localClient->ip.ss.ss_family = res->ai_family;
  source_p->localClient->aftype = res->ai_family;
  freeaddrinfo(res);

  strlcpy(source_p->sockhost, parv[4], sizeof(source_p->sockhost));

  if (strlen(parv[3]) <= HOSTLEN)
    strlcpy(source_p->host, parv[3], sizeof(source_p->host));
  else
    strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host));

  /* Check dlines now, k/glines will be checked on registration */
  if ((aconf = find_dline_conf(&client_p->localClient->ip,
                                client_p->localClient->aftype)))
  {
    if (!(aconf->status & CONF_EXEMPTDLINE))
    {
      exit_client(client_p, &me, "D-lined");
      return;
    }
  }

  sendto_one(source_p, ":%s NOTICE %s :CGI:IRC host/IP set to %s %s", me.name,
             source_p->name[0] ? source_p->name : "*", parv[3], parv[4]);
}

static struct Message webirc_msgtab = {
  "WEBIRC", 0, 0, 5, MAXPARA, MFLG_SLOW, 0,
  { mr_webirc, m_ignore, m_ignore, m_ignore, m_ignore, m_ignore }
};

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

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

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	1822
Committed:	Sun Apr 14 12:36:55 2013 UTC (13 years, 3 months ago) by michael
Content type:	text/x-csrc
File size:	5756 byte(s)
Log Message:	- Added preliminary support for ISO 3166 alpha-2 two letter country code enabled auth{} blocks. Requires libGeoIP. - Added no_join to auth::flags
#	Content
1	/*
2	* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3	* m_webirc.c: Makes CGI:IRC users appear as coming from their real host
4	*
5	* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
6	* Copyright (C) 2002-2006 ircd-ratbox development team
7	* Copyright (C) 1996-2012 Hybrid Development Team
8	*
9	* This program is free software; you can redistribute it and/or modify
10	* it under the terms of the GNU General Public License as published by
11	* the Free Software Foundation; either version 2 of the License, or
12	* (at your option) any later version.
13	*
14	* This program is distributed in the hope that it will be useful,
15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17	* GNU General Public License for more details.
18	*
19	* You should have received a copy of the GNU General Public License
20	* along with this program; if not, write to the Free Software
21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
22	* USA
23	*
24	* $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "list.h"
29	#include "client.h"
30	#include "ircd.h"
31	#include "numeric.h"
32	#include "send.h"
33	#include "irc_string.h"
34	#include "hash.h"
35	#include "parse.h"
36	#include "modules.h"
37	#include "conf.h"
38	#include "hostmask.h"
39
40	/*
41	* Usage:
42	*
43	* auth {
44	* user = "webirc@<cgiirc ip>"; # if identd used, put ident username instead
45	* password = "<password>"; # encryption possible
46	* spoof = "webirc."
47	* class = "users";
48	* encrypted = yes; # [Using encryption is highly recommended]
49	* };
50	*
51	* Possible flags:
52	* kline_exempt - k/g lines on the cgiirc ip are ignored
53	* gline_exempt - glines on the cgiirc ip are ignored
54	*
55	* dlines are checked on the cgiirc ip (of course).
56	* k/d/g/x lines, auth blocks, user limits, etc are checked using the
57	* real host/ip.
58	*
59	* The password should be specified unencrypted in webirc_password in
60	* cgiirc.config
61	*/
62
63	static int
64	invalid_hostname(const char *hostname)
65	{
66	const char *p = hostname;
67	unsigned int has_sep = 0;
68
69	assert(p != NULL);
70
71	if (p == '.' \|\| p == ':')
72	return 1;
73
74	for (; *p; ++p)
75	{
76	if (!IsHostChar(*p))
77	return 1;
78	if (p == '.' \|\| p == ':')
79	++has_sep;
80	}
81
82	return !has_sep;
83	}
84
85	/*
86	* mr_webirc
87	* parv[0] = sender prefix
88	* parv[1] = password
89	* parv[2] = fake username (we ignore this)
90	* parv[3] = fake hostname
91	* parv[4] = fake ip
92	*/
93	static void
94	mr_webirc(struct Client client_p, struct Client source_p, int parc, char *parv[])
95	{
96	struct AccessItem *aconf = NULL;
97	struct ConfItem *conf = NULL;
98	struct addrinfo hints, *res;
99
100	assert(source_p == client_p);
101
102	if (invalid_hostname(parv[4]))
103	{
104	sendto_one(source_p, ":%s NOTICE %s :CGI:IRC: Invalid IP", me.name,
105	source_p->name[0] ? source_p->name : "*");
106	return;
107	}
108
109	aconf = find_address_conf(source_p->host,
110	IsGotId(source_p) ? source_p->username : "webirc",
111	&source_p->localClient->ip,
112	source_p->localClient->aftype, parv[1],
113	source_p->localClient->country_id);
114	if (aconf == NULL \|\| !IsConfClient(aconf))
115	return;
116
117	conf = unmap_conf_item(aconf);
118
119	if (!IsConfDoSpoofIp(aconf) \|\| irccmp(conf->name, "webirc."))
120	{
121	sendto_one(source_p, ":%s NOTICE %s :Not a CGI:IRC auth block", me.name,
122	source_p->name[0] ? source_p->name : "*");
123	return;
124	}
125
126	if (EmptyString(aconf->passwd))
127	{
128	sendto_one(source_p, ":%s NOTICE %s :CGI:IRC auth blocks must have a password",
129	me.name, source_p->name[0] ? source_p->name : "*");
130	return;
131	}
132
133	if (!match_conf_password(parv[1], aconf))
134	{
135	sendto_one(source_p, ":%s NOTICE %s :CGI:IRC password incorrect",
136	me.name, source_p->name[0] ? source_p->name : "*");
137	return;
138	}
139
140	memset(&hints, 0, sizeof(hints));
141
142	hints.ai_family = AF_UNSPEC;
143	hints.ai_socktype = SOCK_STREAM;
144	hints.ai_flags = AI_PASSIVE \| AI_NUMERICHOST;
145
146	if (getaddrinfo(parv[4], NULL, &hints, &res))
147	{
148
149	sendto_one(source_p, ":%s NOTICE %s :Invalid CGI:IRC IP %s", me.name,
150	source_p->name[0] ? source_p->name : "*", parv[4]);
151	return;
152	}
153
154	assert(res != NULL);
155
156	memcpy(&source_p->localClient->ip, res->ai_addr, res->ai_addrlen);
157	source_p->localClient->ip.ss_len = res->ai_addrlen;
158	source_p->localClient->ip.ss.ss_family = res->ai_family;
159	source_p->localClient->aftype = res->ai_family;
160	freeaddrinfo(res);
161
162	strlcpy(source_p->sockhost, parv[4], sizeof(source_p->sockhost));
163
164	if (strlen(parv[3]) <= HOSTLEN)
165	strlcpy(source_p->host, parv[3], sizeof(source_p->host));
166	else
167	strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host));
168
169	/* Check dlines now, k/glines will be checked on registration */
170	if ((aconf = find_dline_conf(&client_p->localClient->ip,
171	client_p->localClient->aftype)))
172	{
173	if (!(aconf->status & CONF_EXEMPTDLINE))
174	{
175	exit_client(client_p, &me, "D-lined");
176	return;
177	}
178	}
179
180	sendto_one(source_p, ":%s NOTICE %s :CGI:IRC host/IP set to %s %s", me.name,
181	source_p->name[0] ? source_p->name : "*", parv[3], parv[4]);
182	}
183
184	static struct Message webirc_msgtab = {
185	"WEBIRC", 0, 0, 5, MAXPARA, MFLG_SLOW, 0,
186	{ mr_webirc, m_ignore, m_ignore, m_ignore, m_ignore, m_ignore }
187	};
188
189	static void
190	module_init(void)
191	{
192	mod_add_cmd(&webirc_msgtab);
193	}
194
195	static void
196	module_exit(void)
197	{
198	mod_del_cmd(&webirc_msgtab);
199	}
200
201	struct module module_entry = {
202	.node = { NULL, NULL, NULL },
203	.name = NULL,
204	.version = "$Revision$",
205	.handle = NULL,
206	.modinit = module_init,
207	.modexit = module_exit,
208	.flags = 0
209	};