trunk/modules/m_gline.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  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
 */

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

#include "stdinc.h"
#include "list.h"
#include "s_gline.h"
#include "channel.h"
#include "client.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "conf.h"
#include "hostmask.h"
#include "numeric.h"
#include "s_bsd.h"
#include "s_misc.h"
#include "send.h"
#include "s_serv.h"
#include "hash.h"
#include "parse.h"
#include "modules.h"
#include "log.h"
#include "conf_db.h"

#define GLINE_NOT_PLACED     0
#define GLINE_ALREADY_VOTED -1
#define GLINE_PLACED         1


/*! \brief Adds a GLINE to the configuration subsystem.
 *
 * \param source_p Operator requesting gline
 * \param user     Username covered by the gline
 * \param host     Hostname covered by the gline
 * \param reason   Reason for the gline
 */
static void
set_local_gline(const struct Client *source_p, const char *user,
                const char *host, const char *reason)
{
  char buffer[IRCD_BUFSIZE];
  struct MaskItem *conf = conf_make(CONF_GLINE);

  snprintf(buffer, sizeof(buffer), "%s (%s)", reason, smalldate(CurrentTime));
  DupString(conf->reason, buffer);
  DupString(conf->user, user);
  DupString(conf->host, host);

  conf->setat = CurrentTime;
  conf->hold = CurrentTime + ConfigFileEntry.gline_time;
  SetConfDatabase(conf);

  sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                       "%s added G-Line for [%s@%s] [%s]",
                       get_oper_name(source_p),
                       conf->user, conf->host, conf->reason);
  ilog(LOG_TYPE_GLINE, "%s added G-Line for [%s@%s] [%s]",
       get_oper_name(source_p), conf->user, conf->host, conf->reason);

  add_conf_by_address(CONF_GLINE, conf);
  rehashed_klines = 1;
}

/*! \brief Removes a GLINE from the configuration subsystem.
 *
 * \param user     Username covered by the gline
 * \param host     Hostname covered by the gline
 */
static int
remove_gline_match(const char *user, const char *host)
{
  struct irc_ssaddr iphost, *piphost;
  struct MaskItem *conf;
  int t = 0;
  int aftype = 0;

  if ((t = parse_netmask(host, &iphost, NULL)) != HM_HOST)
  {
#ifdef IPV6
    if (t == HM_IPV6)
      aftype = AF_INET6;
    else
#endif
      aftype = AF_INET;
    piphost = &iphost;
  }
  else
    piphost = NULL;

  if ((conf = find_conf_by_address(host, piphost, CONF_GLINE, aftype, user, NULL, 0)))
  {
    if (IsConfDatabase(conf))
    {
      delete_one_address_conf(host, conf);
      return 1;
    }
  }

  return 0;
}

/*! \brief This function is called once a majority of opers have agreed on a
 *         GLINE/GUNGLINE, and it can be placed. The information about an
 *         operator being passed to us happens to be the operator who pushed us
 *         over the "majority" level needed. See check_majority() for more
 *         information.
 *
 * \param source_p Operator requesting gline
 * \param user     Username covered by the gline
 * \param host     Hostname covered by the gline
 * \param reason   Reason for the gline
 * \param type     Valid values are either GLINE_PENDING_ADD_TYPE, or
 *                 GLINE_PENDING_DEL_TYPE
 */
static void
add_new_majority(const struct Client *source_p, const char *user,
                 const char *host, const char *reason, const unsigned int type)
{
  struct gline_pending *pending = MyMalloc(sizeof(struct gline_pending));

  strlcpy(pending->vote_1.oper_nick, source_p->name, sizeof(pending->vote_1.oper_nick));
  strlcpy(pending->vote_1.oper_user, source_p->username, sizeof(pending->vote_1.oper_user));
  strlcpy(pending->vote_1.oper_host, source_p->host, sizeof(pending->vote_1.oper_host));
  strlcpy(pending->vote_1.oper_server, source_p->servptr->name, sizeof(pending->vote_1.oper_server));

  strlcpy(pending->user, user, sizeof(pending->user));
  strlcpy(pending->host, host, sizeof(pending->host));
  strlcpy(pending->vote_1.reason, reason, sizeof(pending->vote_1.reason));

  pending->last_gline_time = CurrentTime;
  pending->vote_1.time_request = CurrentTime;

  dlinkAdd(pending, &pending->node, &pending_glines[type]);
}

/*! \brief See if there is a majority agreement on a GLINE on the given user.
 *         There must be at least 3 different opers agreeing on this
 *         GLINE/GUNGLINE
 *
 * \param source_p Operator requesting gline
 * \param user     Username covered by the gline
 * \param host     Hostname covered by the gline
 * \param reason   Reason for the gline
 * \param type     Valid values are either GLINE_PENDING_ADD_TYPE, or
 *                 GLINE_PENDING_DEL_TYPE 
 *
 * \return
 *         - GLINE_ALREADY_VOTED  returned if oper/server has already voted
 *         - GLINE_PLACED         returned if this triggers a gline
 *         - GLINE_NOT_PLACED     returned if not triggered
 */
static int
check_majority(const struct Client *source_p, const char *user,
               const char *host, const char *reason, const int type)
{
  dlink_node *dn_ptr = NULL;

  cleanup_glines(NULL);

  /* if its already glined, why bother? :) -- fl_ */
  if ((type == GLINE_PENDING_ADD_TYPE) && find_is_glined(host, user))
    return GLINE_NOT_PLACED;

  DLINK_FOREACH(dn_ptr, pending_glines[type].head)
  {
    struct gline_pending *gp_ptr = dn_ptr->data;

    if (irccmp(gp_ptr->user, user) ||
        irccmp(gp_ptr->host, host))
      continue;

    if ((!irccmp(gp_ptr->vote_1.oper_user, source_p->username) &&
        !irccmp(gp_ptr->vote_1.oper_host, source_p->host))     ||
        !irccmp(gp_ptr->vote_1.oper_server, source_p->servptr->name))
      return GLINE_ALREADY_VOTED;

    if (gp_ptr->vote_2.oper_user[0] != '\0')
    {
      /* if two other opers on two different servers have voted yes */
      if ((!irccmp(gp_ptr->vote_2.oper_user, source_p->username) &&
          !irccmp(gp_ptr->vote_2.oper_host, source_p->host))     ||
          !irccmp(gp_ptr->vote_2.oper_server, source_p->servptr->name))
        return GLINE_ALREADY_VOTED;

      if (type == GLINE_PENDING_DEL_TYPE)
      {
        if (remove_gline_match(user, host))
        {
          sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                               "%s has removed the G-Line for: [%s@%s]",
                               get_oper_name(source_p), user, host);
          ilog(LOG_TYPE_GLINE, "%s removed G-Line for [%s@%s]",
               get_oper_name(source_p), user, host);
        }
      }
      else
        /* trigger the gline using the original reason --fl */
        set_local_gline(source_p, user, host, gp_ptr->vote_1.reason);

      cleanup_glines(gp_ptr);
      return GLINE_PLACED;
    }

    strlcpy(gp_ptr->vote_2.oper_nick, source_p->name,
            sizeof(gp_ptr->vote_2.oper_nick));
    strlcpy(gp_ptr->vote_2.oper_user, source_p->username,
            sizeof(gp_ptr->vote_2.oper_user));
    strlcpy(gp_ptr->vote_2.oper_host, source_p->host,
            sizeof(gp_ptr->vote_2.oper_host));
    strlcpy(gp_ptr->vote_2.reason, reason,
            sizeof(gp_ptr->vote_2.reason));
    strlcpy(gp_ptr->vote_2.oper_server, source_p->servptr->name,
            sizeof(gp_ptr->vote_2.oper_server));
    gp_ptr->last_gline_time = CurrentTime;
    gp_ptr->vote_2.time_request = CurrentTime;
    return GLINE_NOT_PLACED;
  }

  /*
   * Didn't find this user@host gline in pending gline list
   * so add it.
   */
  add_new_majority(source_p, user, host, reason, type);
  return GLINE_NOT_PLACED;
}

static void
do_sgline(struct Client *source_p, int parc, char *parv[], int prop)
{
  const char *reason = NULL;      /* reason for "victims" demise       */
  const char *user = NULL;
  const char *host = NULL;        /* user and host of GLINE "victim"   */

  if (!IsClient(source_p))
    return;

  if (parc != 4 || EmptyString(parv[3]))
    return;

  assert(source_p->servptr != NULL);

  user   = parv[1];
  host   = parv[2];
  reason = parv[3];

  sendto_server(source_p->from, CAP_GLN|CAP_TS6, NOCAPS,
                ":%s GLINE %s %s :%s",
                ID(source_p), user, host, reason);
  sendto_server(source_p->from, CAP_GLN, CAP_TS6,
                ":%s GLINE %s %s :%s",
                source_p->name, user, host, reason);

  if (ConfigFileEntry.glines)
  {
    if (!valid_wild_card(source_p, 1, 2, user, host))
      return;

    if (IsClient(source_p))
    {
      const char *p = NULL;

      if ((p = strchr(host, '/')))
      {
        int bitlen = strtol(++p, NULL, 10);
        int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 :
                                             ConfigFileEntry.gline_min_cidr;

        if (bitlen < min_bitlen)
        {
          sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                               "%s is requesting a GLINE with a CIDR mask < %d for [%s@%s] [%s]",
                               get_oper_name(source_p), min_bitlen,
                               user, host, reason);
          return;
        }
      }
    }

     /* If at least 3 opers agree this user should be G lined then do it */
     if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) ==
         GLINE_ALREADY_VOTED)
     {
       sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                            "oper or server has already voted");
       return;
     }

     sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                          "%s requesting G-Line for [%s@%s] [%s]",
                          get_oper_name(source_p),
                          user, host, reason);
     ilog(LOG_TYPE_GLINE, "#gline for %s@%s [%s] requested by %s",
          user, host, reason, get_oper_name(source_p));
  }
}


/*! \brief GLINE command handler (called by operators)
 *
 * \param client_p Pointer to allocated Client struct with physical connection
 *                 to this server, i.e. with an open socket connected.
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = sender prefix
 *      - parv[1] = user\@host mask
 *      - parv[2] = reason
 */
static void
mo_gline(struct Client *client_p, struct Client *source_p,
         int parc, char *parv[])
{
  char *user = NULL;
  char *host = NULL;
  char *reason = NULL;
  char *p;

  if (!HasOFlag(source_p, OPER_FLAG_GLINE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "gline");
    return;
  }

  if (!ConfigFileEntry.glines)
  {
    sendto_one(source_p, ":%s NOTICE %s :GLINE disabled",
               me.name, source_p->name);
    return;
  }

  if (parse_aline("GLINE", source_p, parc, parv, AWILD,
                  &user, &host, NULL, NULL, &reason) < 0)
    return;

  if ((p = strchr(host, '/')) != NULL)
  {
    int bitlen = strtol(++p, NULL, 10);
    int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 :
                                         ConfigFileEntry.gline_min_cidr;
    if (bitlen < min_bitlen)
    {
      sendto_one(source_p, ":%s NOTICE %s :Cannot set G-Lines with CIDR length < %d",
                 me.name, source_p->name, min_bitlen);
      return;
    }
  }
  
  /* If at least 3 opers agree this user should be G lined then do it */
  if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) ==
      GLINE_ALREADY_VOTED)
  {
    sendto_one(source_p,
               ":%s NOTICE %s :This server or oper has already voted",
               me.name, source_p->name);
    return;
  }

  /*
   * call these two functions first so the 'requesting' notice always comes
   * before the 'has triggered' notice.  -bill
   */
  sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                       "%s requesting G-Line for [%s@%s] [%s]",
                       get_oper_name(source_p),
                       user, host, reason);
  ilog(LOG_TYPE_GLINE, "#gline for %s@%s [%s] requested by %s!%s@%s",
       user, host, reason, source_p->name, source_p->username,
       source_p->host);

  /* 4 param version for hyb-7 servers */
  sendto_server(NULL, CAP_GLN|CAP_TS6, NOCAPS,
                ":%s GLINE %s %s :%s",
                ID(source_p), user, host, reason);
  sendto_server(NULL, CAP_GLN, CAP_TS6,
                ":%s GLINE %s %s :%s",
                source_p->name, user, host, reason);
}

/* ms_gline()
 * me_gline()
 * do_sgline()
 *
 * inputs       - The usual for a m_ function
 * output       -
 * side effects -
 *
 * Place a G line if 3 opers agree on the identical user@host
 * 
 * Allow this server to pass along GLINE if received and
 * GLINES is not defined.
 *
 * ENCAP'd GLINES are propagated by encap code.
 */

static void
ms_gline(struct Client *client_p, struct Client *source_p,
         int parc, char *parv[])
{
  do_sgline(source_p, parc, parv, 1);
}

static void
me_gline(struct Client *client_p, struct Client *source_p,
         int parc, char *parv[])
{
  do_sgline(source_p, parc, parv, 0);
}

static void
do_sungline(struct Client *source_p, const char *user,
            const char *host, const char *reason, int prop)
{
  assert(source_p->servptr != NULL);

  sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                       "%s requesting UNG-Line for [%s@%s] [%s]",
                       get_oper_name(source_p), user, host, reason);
  ilog(LOG_TYPE_GLINE, "#ungline for %s@%s [%s] requested by %s",
       user, host, reason, get_oper_name(source_p));

  /* If at least 3 opers agree this user should be un G lined then do it */
  if (check_majority(source_p, user, host, reason, GLINE_PENDING_DEL_TYPE) ==
      GLINE_ALREADY_VOTED)
    sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                         "oper or server has already voted");

  if (prop)
  {
    sendto_server(source_p->from, CAP_ENCAP|CAP_TS6, NOCAPS,
                  ":%s ENCAP * GUNGLINE %s %s :%s",
                  ID(source_p), user, host, reason);
    sendto_server(source_p->from, CAP_ENCAP, CAP_TS6,
                  ":%s ENCAP * GUNGLINE %s %s :%s",
                  source_p->name, user, host, reason);
  }
}

/*! \brief GUNGLINE command handler (called in response to an encapsulated
 *                  GUNGLINE command)
 *
 * \param client_p Pointer to allocated Client struct with physical connection
 *                 to this server, i.e. with an open socket connected.
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = sender prefix
 *      - parv[1] = username
 *      - parv[2] = hostname
 *      - parv[3] = reason
 */
static void
me_gungline(struct Client *client_p, struct Client *source_p,
            int parc, char *parv[])
{
  if (ConfigFileEntry.glines)
    do_sungline(source_p, parv[1], parv[2], parv[3], 0);
}

/*! \brief GUNGLINE command handler (called by operators)
 *
 * \param client_p Pointer to allocated Client struct with physical connection
 *                 to this server, i.e. with an open socket connected.
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = sender prefix
 *      - parv[1] = user\@host mask
 *      - parv[2] = reason
 */
static void
mo_gungline(struct Client *client_p, struct Client *source_p,
            int parc, char *parv[])
{
  char *user = NULL;
  char *host = NULL;
  char *reason = NULL;

  if (!HasOFlag(source_p, OPER_FLAG_GLINE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "gline");
    return;
  }

  if (!ConfigFileEntry.glines)
  {
    sendto_one(source_p, ":%s NOTICE %s :GUNGLINE disabled",
               me.name, source_p->name);
    return;
  }

  if (parse_aline("GUNGLINE", source_p, parc, parv, 0, &user,
                  &host, NULL, NULL, &reason) < 0)
    return;

  do_sungline(source_p, user, host, reason, 1);
}

/*
 * gline enforces 3 parameters to force operator to give a reason
 * a gline is not valid with "No reason"
 * -db
 */
static struct Message gline_msgtab = {
  "GLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_not_oper, ms_gline, me_gline, mo_gline, m_ignore }
};

static struct Message ungline_msgtab = {
  "GUNGLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_not_oper, m_ignore, me_gungline, mo_gungline, m_ignore }
};

static void
module_init(void)
{
  mod_add_cmd(&gline_msgtab);
  mod_add_cmd(&ungline_msgtab);
  add_capability("GLN", CAP_GLN, 1);
}

static void
module_exit(void)
{
  mod_del_cmd(&gline_msgtab);
  mod_del_cmd(&ungline_msgtab);
  delete_capability("GLN");
}

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	1644
Committed:	Tue Nov 6 22:20:16 2012 UTC (12 years, 9 months ago) by michael
Content type:	text/x-csrc
File size:	18356 byte(s)
Log Message:	- More config subsystem cleanups
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			*
4			* Copyright (C) 2002 by the past and present ircd coders, and others.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19			* USA
20			*/
21
22	michael	1008	/*! \file m_gline.c
23			* \brief Includes required functions for processing the GLINE command.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	1011	#include "list.h"
29	adx	30	#include "s_gline.h"
30			#include "channel.h"
31			#include "client.h"
32			#include "irc_string.h"
33			#include "sprintf_irc.h"
34			#include "ircd.h"
35	michael	1632	#include "conf.h"
36	adx	30	#include "hostmask.h"
37			#include "numeric.h"
38			#include "s_bsd.h"
39			#include "s_misc.h"
40			#include "send.h"
41			#include "s_serv.h"
42			#include "hash.h"
43			#include "parse.h"
44			#include "modules.h"
45	michael	1309	#include "log.h"
46	michael	1622	#include "conf_db.h"
47	adx	30
48			#define GLINE_NOT_PLACED 0
49			#define GLINE_ALREADY_VOTED -1
50			#define GLINE_PLACED 1
51
52
53	michael	1009	/*! \brief Adds a GLINE to the configuration subsystem.
54			*
55			* \param source_p Operator requesting gline
56			* \param user Username covered by the gline
57			* \param host Hostname covered by the gline
58			* \param reason Reason for the gline
59			*/
60			static void
61			set_local_gline(const struct Client source_p, const char user,
62			const char host, const char reason)
63			{
64			char buffer[IRCD_BUFSIZE];
65	michael	1632	struct MaskItem *conf = conf_make(CONF_GLINE);
66	michael	1008
67	michael	1009	snprintf(buffer, sizeof(buffer), "%s (%s)", reason, smalldate(CurrentTime));
68	michael	1632	DupString(conf->reason, buffer);
69			DupString(conf->user, user);
70			DupString(conf->host, host);
71	michael	1009
72	michael	1632	conf->setat = CurrentTime;
73			conf->hold = CurrentTime + ConfigFileEntry.gline_time;
74			SetConfDatabase(conf);
75	michael	1009
76	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
77	michael	1009	"%s added G-Line for [%s@%s] [%s]",
78			get_oper_name(source_p),
79	michael	1632	conf->user, conf->host, conf->reason);
80	michael	1247	ilog(LOG_TYPE_GLINE, "%s added G-Line for [%s@%s] [%s]",
81	michael	1632	get_oper_name(source_p), conf->user, conf->host, conf->reason);
82	michael	1247
83	michael	1632	add_conf_by_address(CONF_GLINE, conf);
84	michael	1009	rehashed_klines = 1;
85			}
86
87			/*! \brief Removes a GLINE from the configuration subsystem.
88			*
89			* \param user Username covered by the gline
90			* \param host Hostname covered by the gline
91			*/
92			static int
93			remove_gline_match(const char user, const char host)
94			{
95	michael	1369	struct irc_ssaddr iphost, *piphost;
96	michael	1632	struct MaskItem *conf;
97	michael	1644	int t = 0;
98			int aftype = 0;
99	michael	1009
100	michael	1369	if ((t = parse_netmask(host, &iphost, NULL)) != HM_HOST)
101	michael	1009	{
102			#ifdef IPV6
103	michael	1369	if (t == HM_IPV6)
104	michael	1644	aftype = AF_INET6;
105	michael	1369	else
106	michael	1009	#endif
107	michael	1644	aftype = AF_INET;
108	michael	1369	piphost = &iphost;
109			}
110			else
111			piphost = NULL;
112
113	michael	1644	if ((conf = find_conf_by_address(host, piphost, CONF_GLINE, aftype, user, NULL, 0)))
114	michael	1369	{
115	michael	1632	if (IsConfDatabase(conf))
116	michael	1628	{
117	michael	1632	delete_one_address_conf(host, conf);
118	michael	1628	return 1;
119			}
120	michael	1009	}
121
122			return 0;
123			}
124
125	michael	1008	/*! \brief This function is called once a majority of opers have agreed on a
126			* GLINE/GUNGLINE, and it can be placed. The information about an
127			* operator being passed to us happens to be the operator who pushed us
128			* over the "majority" level needed. See check_majority() for more
129			* information.
130	adx	30	*
131	michael	1008	* \param source_p Operator requesting gline
132			* \param user Username covered by the gline
133			* \param host Hostname covered by the gline
134			* \param reason Reason for the gline
135			* \param type Valid values are either GLINE_PENDING_ADD_TYPE, or
136			* GLINE_PENDING_DEL_TYPE
137	adx	30	*/
138	michael	1008	static void
139			add_new_majority(const struct Client source_p, const char user,
140			const char host, const char reason, const unsigned int type)
141			{
142			struct gline_pending *pending = MyMalloc(sizeof(struct gline_pending));
143
144			strlcpy(pending->vote_1.oper_nick, source_p->name, sizeof(pending->vote_1.oper_nick));
145			strlcpy(pending->vote_1.oper_user, source_p->username, sizeof(pending->vote_1.oper_user));
146			strlcpy(pending->vote_1.oper_host, source_p->host, sizeof(pending->vote_1.oper_host));
147			strlcpy(pending->vote_1.oper_server, source_p->servptr->name, sizeof(pending->vote_1.oper_server));
148
149			strlcpy(pending->user, user, sizeof(pending->user));
150			strlcpy(pending->host, host, sizeof(pending->host));
151			strlcpy(pending->vote_1.reason, reason, sizeof(pending->vote_1.reason));
152
153			pending->last_gline_time = CurrentTime;
154			pending->vote_1.time_request = CurrentTime;
155
156			dlinkAdd(pending, &pending->node, &pending_glines[type]);
157			}
158
159			/*! \brief See if there is a majority agreement on a GLINE on the given user.
160			* There must be at least 3 different opers agreeing on this
161			* GLINE/GUNGLINE
162	adx	30	*
163	michael	1008	* \param source_p Operator requesting gline
164			* \param user Username covered by the gline
165			* \param host Hostname covered by the gline
166			* \param reason Reason for the gline
167			* \param type Valid values are either GLINE_PENDING_ADD_TYPE, or
168			* GLINE_PENDING_DEL_TYPE
169			*
170			* \return
171			* - GLINE_ALREADY_VOTED returned if oper/server has already voted
172			* - GLINE_PLACED returned if this triggers a gline
173			* - GLINE_NOT_PLACED returned if not triggered
174	adx	30	*/
175	michael	1008	static int
176			check_majority(const struct Client source_p, const char user,
177			const char host, const char reason, const int type)
178	adx	30	{
179	michael	1008	dlink_node *dn_ptr = NULL;
180	adx	30
181	michael	1008	cleanup_glines(NULL);
182	adx	30
183	michael	1008	/* if its already glined, why bother? :) -- fl_ */
184			if ((type == GLINE_PENDING_ADD_TYPE) && find_is_glined(host, user))
185			return GLINE_NOT_PLACED;
186
187			DLINK_FOREACH(dn_ptr, pending_glines[type].head)
188	adx	30	{
189	michael	1008	struct gline_pending *gp_ptr = dn_ptr->data;
190	adx	30
191	michael	1008	if (irccmp(gp_ptr->user, user) \|\|
192			irccmp(gp_ptr->host, host))
193			continue;
194	adx	30
195	michael	1008	if ((!irccmp(gp_ptr->vote_1.oper_user, source_p->username) &&
196			!irccmp(gp_ptr->vote_1.oper_host, source_p->host)) \|\|
197			!irccmp(gp_ptr->vote_1.oper_server, source_p->servptr->name))
198			return GLINE_ALREADY_VOTED;
199
200			if (gp_ptr->vote_2.oper_user[0] != '\0')
201	adx	30	{
202	michael	1008	/* if two other opers on two different servers have voted yes */
203			if ((!irccmp(gp_ptr->vote_2.oper_user, source_p->username) &&
204			!irccmp(gp_ptr->vote_2.oper_host, source_p->host)) \|\|
205			!irccmp(gp_ptr->vote_2.oper_server, source_p->servptr->name))
206			return GLINE_ALREADY_VOTED;
207
208			if (type == GLINE_PENDING_DEL_TYPE)
209			{
210			if (remove_gline_match(user, host))
211			{
212	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
213	michael	1008	"%s has removed the G-Line for: [%s@%s]",
214			get_oper_name(source_p), user, host);
215	michael	1247	ilog(LOG_TYPE_GLINE, "%s removed G-Line for [%s@%s]",
216	michael	1008	get_oper_name(source_p), user, host);
217			}
218			}
219			else
220			/* trigger the gline using the original reason --fl */
221			set_local_gline(source_p, user, host, gp_ptr->vote_1.reason);
222
223			cleanup_glines(gp_ptr);
224			return GLINE_PLACED;
225	adx	30	}
226	michael	1008
227			strlcpy(gp_ptr->vote_2.oper_nick, source_p->name,
228			sizeof(gp_ptr->vote_2.oper_nick));
229			strlcpy(gp_ptr->vote_2.oper_user, source_p->username,
230			sizeof(gp_ptr->vote_2.oper_user));
231			strlcpy(gp_ptr->vote_2.oper_host, source_p->host,
232			sizeof(gp_ptr->vote_2.oper_host));
233			strlcpy(gp_ptr->vote_2.reason, reason,
234			sizeof(gp_ptr->vote_2.reason));
235			strlcpy(gp_ptr->vote_2.oper_server, source_p->servptr->name,
236			sizeof(gp_ptr->vote_2.oper_server));
237			gp_ptr->last_gline_time = CurrentTime;
238			gp_ptr->vote_2.time_request = CurrentTime;
239			return GLINE_NOT_PLACED;
240	adx	30	}
241
242	michael	552	/*
243	michael	1008	* Didn't find this user@host gline in pending gline list
244			* so add it.
245	adx	30	*/
246	michael	1008	add_new_majority(source_p, user, host, reason, type);
247			return GLINE_NOT_PLACED;
248	adx	30	}
249
250			static void
251	michael	1008	do_sgline(struct Client source_p, int parc, char parv[], int prop)
252	adx	30	{
253			const char reason = NULL; / reason for "victims" demise */
254	michael	1463	const char *user = NULL;
255			const char host = NULL; / user and host of GLINE "victim" */
256	adx	30
257	michael	1482	if (!IsClient(source_p))
258			return;
259	adx	30
260	michael	1482	if (parc != 4 \|\| EmptyString(parv[3]))
261			return;
262
263	adx	30	assert(source_p->servptr != NULL);
264
265	michael	1482	user = parv[1];
266			host = parv[2];
267			reason = parv[3];
268	adx	30
269	michael	1474	sendto_server(source_p->from, CAP_GLN\|CAP_TS6, NOCAPS,
270	michael	1459	":%s GLINE %s %s :%s",
271	michael	1463	ID(source_p), user, host, reason);
272	michael	1474	sendto_server(source_p->from, CAP_GLN, CAP_TS6,
273	michael	1463	":%s GLINE %s %s :%s",
274	michael	1459	source_p->name, user, host, reason);
275	michael	1463
276	adx	30	if (ConfigFileEntry.glines)
277			{
278	michael	1243	if (!valid_wild_card(source_p, 1, 2, user, host))
279	adx	30	return;
280
281			if (IsClient(source_p))
282			{
283			const char *p = NULL;
284	michael	958
285	adx	30	if ((p = strchr(host, '/')))
286			{
287			int bitlen = strtol(++p, NULL, 10);
288			int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 :
289			ConfigFileEntry.gline_min_cidr;
290
291			if (bitlen < min_bitlen)
292			{
293	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
294			"%s is requesting a GLINE with a CIDR mask < %d for [%s@%s] [%s]",
295			get_oper_name(source_p), min_bitlen,
296			user, host, reason);
297	adx	30	return;
298			}
299			}
300			}
301
302			/* If at least 3 opers agree this user should be G lined then do it */
303	michael	988	if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) ==
304	adx	30	GLINE_ALREADY_VOTED)
305			{
306	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
307			"oper or server has already voted");
308	adx	30	return;
309			}
310
311	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
312	michael	554	"%s requesting G-Line for [%s@%s] [%s]",
313			get_oper_name(source_p),
314			user, host, reason);
315	michael	1247	ilog(LOG_TYPE_GLINE, "#gline for %s@%s [%s] requested by %s",
316	adx	30	user, host, reason, get_oper_name(source_p));
317			}
318			}
319
320	michael	1008
321			/*! \brief GLINE command handler (called by operators)
322	adx	30	*
323	michael	1008	* \param client_p Pointer to allocated Client struct with physical connection
324			* to this server, i.e. with an open socket connected.
325			* \param source_p Pointer to allocated Client struct from which the message
326			* originally comes from. This can be a local or remote client.
327			* \param parc Integer holding the number of supplied arguments.
328			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
329			* pointers.
330			* \note Valid arguments for this command are:
331			* - parv[0] = sender prefix
332			* - parv[1] = user\@host mask
333			* - parv[2] = reason
334	adx	30	*/
335			static void
336	michael	1008	mo_gline(struct Client client_p, struct Client source_p,
337			int parc, char *parv[])
338	adx	30	{
339	michael	1008	char *user = NULL;
340			char *host = NULL;
341			char *reason = NULL;
342			char *p;
343	adx	30
344	michael	1463	if (!HasOFlag(source_p, OPER_FLAG_GLINE))
345	michael	1008	{
346	michael	1463	sendto_one(source_p, form_str(ERR_NOPRIVS),
347			me.name, source_p->name, "gline");
348	michael	1008	return;
349			}
350	adx	30
351	michael	1463	if (!ConfigFileEntry.glines)
352	michael	1008	{
353	michael	1463	sendto_one(source_p, ":%s NOTICE %s :GLINE disabled",
354			me.name, source_p->name);
355	michael	1008	return;
356			}
357	adx	30
358	michael	1008	if (parse_aline("GLINE", source_p, parc, parv, AWILD,
359			&user, &host, NULL, NULL, &reason) < 0)
360			return;
361	adx	30
362	michael	1008	if ((p = strchr(host, '/')) != NULL)
363	adx	30	{
364	michael	1008	int bitlen = strtol(++p, NULL, 10);
365			int min_bitlen = strchr(host, ':') ? ConfigFileEntry.gline_min_cidr6 :
366			ConfigFileEntry.gline_min_cidr;
367			if (bitlen < min_bitlen)
368	adx	30	{
369	michael	1008	sendto_one(source_p, ":%s NOTICE %s :Cannot set G-Lines with CIDR length < %d",
370			me.name, source_p->name, min_bitlen);
371			return;
372	michael	957	}
373	adx	30	}
374	michael	1008
375			/* If at least 3 opers agree this user should be G lined then do it */
376			if (check_majority(source_p, user, host, reason, GLINE_PENDING_ADD_TYPE) ==
377			GLINE_ALREADY_VOTED)
378			{
379			sendto_one(source_p,
380			":%s NOTICE %s :This server or oper has already voted",
381			me.name, source_p->name);
382			return;
383			}
384	adx	30
385	michael	957	/*
386	michael	1008	* call these two functions first so the 'requesting' notice always comes
387			* before the 'has triggered' notice. -bill
388	adx	30	*/
389	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
390	michael	1008	"%s requesting G-Line for [%s@%s] [%s]",
391			get_oper_name(source_p),
392			user, host, reason);
393	michael	1247	ilog(LOG_TYPE_GLINE, "#gline for %s@%s [%s] requested by %s!%s@%s",
394	michael	1008	user, host, reason, source_p->name, source_p->username,
395			source_p->host);
396	adx	30
397	michael	1008	/* 4 param version for hyb-7 servers */
398	michael	1474	sendto_server(NULL, CAP_GLN\|CAP_TS6, NOCAPS,
399	michael	1008	":%s GLINE %s %s :%s",
400			ID(source_p), user, host, reason);
401	michael	1474	sendto_server(NULL, CAP_GLN, CAP_TS6,
402	michael	1008	":%s GLINE %s %s :%s",
403			source_p->name, user, host, reason);
404	adx	30	}
405
406	michael	1008	/* ms_gline()
407			* me_gline()
408			* do_sgline()
409	db	937	*
410			* inputs - The usual for a m_ function
411			* output -
412			* side effects -
413			*
414	michael	1008	* Place a G line if 3 opers agree on the identical user@host
415	db	937	*
416	michael	1008	* Allow this server to pass along GLINE if received and
417			* GLINES is not defined.
418			*
419			* ENCAP'd GLINES are propagated by encap code.
420	db	937	*/
421
422			static void
423	michael	1008	ms_gline(struct Client client_p, struct Client source_p,
424			int parc, char *parv[])
425	db	937	{
426	michael	1008	do_sgline(source_p, parc, parv, 1);
427	db	937	}
428
429			static void
430	michael	1008	me_gline(struct Client client_p, struct Client source_p,
431			int parc, char *parv[])
432			{
433			do_sgline(source_p, parc, parv, 0);
434			}
435
436			static void
437	michael	1006	do_sungline(struct Client source_p, const char user,
438			const char host, const char reason, int prop)
439	db	937	{
440			assert(source_p->servptr != NULL);
441
442	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
443	michael	957	"%s requesting UNG-Line for [%s@%s] [%s]",
444	michael	1006	get_oper_name(source_p), user, host, reason);
445	michael	1247	ilog(LOG_TYPE_GLINE, "#ungline for %s@%s [%s] requested by %s",
446	michael	957	user, host, reason, get_oper_name(source_p));
447	db	937
448	michael	957	/* If at least 3 opers agree this user should be un G lined then do it */
449	michael	958	if (check_majority(source_p, user, host, reason, GLINE_PENDING_DEL_TYPE) ==
450	michael	957	GLINE_ALREADY_VOTED)
451	michael	1618	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
452			"oper or server has already voted");
453	michael	1006
454			if (prop)
455			{
456	michael	1474	sendto_server(source_p->from, CAP_ENCAP\|CAP_TS6, NOCAPS,
457	michael	1006	":%s ENCAP * GUNGLINE %s %s :%s",
458			ID(source_p), user, host, reason);
459	michael	1474	sendto_server(source_p->from, CAP_ENCAP, CAP_TS6,
460	michael	1006	":%s ENCAP * GUNGLINE %s %s :%s",
461			source_p->name, user, host, reason);
462			}
463	db	937	}
464
465	michael	1008	/*! \brief GUNGLINE command handler (called in response to an encapsulated
466			* GUNGLINE command)
467	db	937	*
468	michael	1008	* \param client_p Pointer to allocated Client struct with physical connection
469			* to this server, i.e. with an open socket connected.
470			* \param source_p Pointer to allocated Client struct from which the message
471			* originally comes from. This can be a local or remote client.
472			* \param parc Integer holding the number of supplied arguments.
473			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
474			* pointers.
475			* \note Valid arguments for this command are:
476			* - parv[0] = sender prefix
477			* - parv[1] = username
478			* - parv[2] = hostname
479			* - parv[3] = reason
480	db	937	*/
481	michael	1008	static void
482			me_gungline(struct Client client_p, struct Client source_p,
483			int parc, char *parv[])
484			{
485			if (ConfigFileEntry.glines)
486			do_sungline(source_p, parv[1], parv[2], parv[3], 0);
487			}
488
489			/*! \brief GUNGLINE command handler (called by operators)
490	db	937	*
491	michael	1008	* \param client_p Pointer to allocated Client struct with physical connection
492			* to this server, i.e. with an open socket connected.
493			* \param source_p Pointer to allocated Client struct from which the message
494			* originally comes from. This can be a local or remote client.
495			* \param parc Integer holding the number of supplied arguments.
496			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
497			* pointers.
498			* \note Valid arguments for this command are:
499			* - parv[0] = sender prefix
500			* - parv[1] = user\@host mask
501			* - parv[2] = reason
502	db	937	*/
503			static void
504	db	940	mo_gungline(struct Client client_p, struct Client source_p,
505	michael	957	int parc, char *parv[])
506	db	937	{
507			char *user = NULL;
508	michael	1008	char *host = NULL;
509			char *reason = NULL;
510	db	937
511	michael	1463	if (!HasOFlag(source_p, OPER_FLAG_GLINE))
512	db	937	{
513	michael	1463	sendto_one(source_p, form_str(ERR_NOPRIVS),
514			me.name, source_p->name, "gline");
515	db	937	return;
516			}
517
518	michael	1463	if (!ConfigFileEntry.glines)
519	db	937	{
520	michael	1463	sendto_one(source_p, ":%s NOTICE %s :GUNGLINE disabled",
521			me.name, source_p->name);
522	db	937	return;
523			}
524
525	michael	957	if (parse_aline("GUNGLINE", source_p, parc, parv, 0, &user,
526			&host, NULL, NULL, &reason) < 0)
527	db	937	return;
528
529	michael	1006	do_sungline(source_p, user, host, reason, 1);
530	db	937	}
531	michael	1230
532			/*
533			* gline enforces 3 parameters to force operator to give a reason
534			* a gline is not valid with "No reason"
535			* -db
536			*/
537			static struct Message gline_msgtab = {
538			"GLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0,
539			{ m_unregistered, m_not_oper, ms_gline, me_gline, mo_gline, m_ignore }
540			};
541
542			static struct Message ungline_msgtab = {
543			"GUNGLINE", 0, 0, 3, MAXPARA, MFLG_SLOW, 0,
544			{ m_unregistered, m_not_oper, m_ignore, me_gungline, mo_gungline, m_ignore }
545			};
546
547			static void
548			module_init(void)
549			{
550			mod_add_cmd(&gline_msgtab);
551			mod_add_cmd(&ungline_msgtab);
552			add_capability("GLN", CAP_GLN, 1);
553			}
554
555			static void
556			module_exit(void)
557			{
558			mod_del_cmd(&gline_msgtab);
559			mod_del_cmd(&ungline_msgtab);
560			delete_capability("GLN");
561			}
562
563			struct module module_entry = {
564			.node = { NULL, NULL, NULL },
565			.name = NULL,
566			.version = "$Revision$",
567			.handle = NULL,
568			.modinit = module_init,
569			.modexit = module_exit,
570			.flags = 0
571			};