/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_kline.c: Bans a user.
 *
 *  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
 *
 *  $Id: m_kline.c 611 2006-05-18 11:43:38Z michael $
 */

#include "stdinc.h"
#include "tools.h"
#include "channel.h"
#include "client.h"
#include "common.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "hostmask.h"
#include "numeric.h"
#include "list.h"
#include "fdlist.h"
#include "s_bsd.h"
#include "s_conf.h"
#include "s_log.h"
#include "s_misc.h"
#include "send.h"
#include "hash.h"
#include "handlers.h"
#include "s_serv.h"
#include "msg.h"
#include "s_gline.h"
#include "parse.h"
#include "modules.h"
#include "tools.h"
#include "irc_getnameinfo.h"


static void me_kline(struct Client *, struct Client *, int, char **);
static void mo_kline(struct Client *, struct Client *, int, char **);
static void ms_kline(struct Client *, struct Client *, int, char **);
static void mo_dline(struct Client *, struct Client *, int, char **);
static void me_unkline(struct Client *, struct Client *, int, char **);
static void mo_unkline(struct Client *, struct Client *, int, char **);
static void ms_unkline(struct Client *, struct Client *, int, char **);
static void mo_undline(struct Client *, struct Client *, int, char **);

static int remove_tkline_match(const char *, const char *);
static int remove_tdline_match(const char *);

struct Message kline_msgtab = {
  "KLINE", 0, 0, 2, 0, MFLG_SLOW, 0,
   {m_unregistered, m_not_oper, ms_kline, me_kline, mo_kline, m_ignore}
};

struct Message dline_msgtab = {
  "DLINE", 0, 0, 2, 0, MFLG_SLOW, 0,
   {m_unregistered, m_not_oper, m_error, m_ignore, mo_dline, m_ignore}
};

struct Message unkline_msgtab = {
  "UNKLINE", 0, 0, 2, 0, MFLG_SLOW, 0,
   {m_unregistered, m_not_oper, ms_unkline, me_unkline, mo_unkline, m_ignore}
};

struct Message undline_msgtab = {
  "UNDLINE", 0, 0, 2, 0, MFLG_SLOW, 0,
   {m_unregistered, m_not_oper, m_error, m_ignore, mo_undline, m_ignore}
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&kline_msgtab);
  mod_add_cmd(&unkline_msgtab);
  mod_add_cmd(&dline_msgtab);
  mod_add_cmd(&undline_msgtab);
  add_capability("KLN", CAP_KLN, 1);
  add_capability("UNKLN", CAP_UNKLN, 1);
}

void
_moddeinit(void)
{
  mod_del_cmd(&kline_msgtab);
  mod_del_cmd(&unkline_msgtab);
  mod_del_cmd(&dline_msgtab);
  mod_del_cmd(&undline_msgtab);
  delete_capability("UNKLN");
  delete_capability("KLN");
}

const char *_version = "$Revision: 611 $";
#endif

/* Local function prototypes */
static int already_placed_kline(struct Client *, const char *, const char *, int);
static void apply_kline(struct Client *, struct ConfItem *, const char *, time_t);
static void apply_tkline(struct Client *, struct ConfItem *, int);

static char buffer[IRCD_BUFSIZE];

/* mo_kline()
 *
 * inputs	- pointer to server
 *		- pointer to client
 *		- parameter count
 *		- parameter list
 * output	-
 * side effects - k line is added
 */
static void
mo_kline(struct Client *client_p, struct Client *source_p,
	 int parc, char **parv)
{
  char *reason = NULL;
  char *oper_reason;
  char *user = NULL;
  char *host = NULL;
  const char *current_date;
  char *target_server = NULL;
  struct ConfItem *conf;
  struct AccessItem *aconf;
  time_t tkline_time = 0;
  time_t cur_time;

  if (!IsOperK(source_p))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "kline");
    return;
  }

  if (parse_aline("KLINE", source_p, parc, parv,
		  AWILD, &user, &host, &tkline_time, &target_server, &reason) < 0)
    return;

  if (target_server != NULL)
  {
    if (HasID(source_p))
    {
      sendto_server(NULL, source_p, NULL, CAP_KLN|CAP_TS6, NOCAPS, LL_ICLIENT,
                    ":%s KLINE %s %lu %s %s :%s",
                    source_p->id, target_server, (unsigned long)tkline_time,
                    user, host, reason);
      sendto_server(NULL, source_p, NULL, CAP_KLN, CAP_TS6, LL_ICLIENT,
                    ":%s KLINE %s %lu %s %s :%s",
                    source_p->name, target_server, (unsigned long)tkline_time,
                    user, host, reason);
    }
    else
      sendto_server(NULL, source_p, NULL, CAP_KLN, NOCAPS, LL_ICLIENT,
                    ":%s KLINE %s %lu %s %s :%s",
                    source_p->name, target_server, (unsigned long)tkline_time,
                    user, host, reason);

    /* Allow ON to apply local kline as well if it matches */
    if (!match(target_server, me.name))
      return;
  }
  else
    cluster_a_line(source_p, "KLINE", CAP_KLN, SHARED_KLINE,
		   "%d %s %s :%s", tkline_time, user, host, reason);

  if (already_placed_kline(source_p, user, host, YES))
    return;

  /* Look for an oper reason */
  if ((oper_reason = strchr(reason, '|')) != NULL)
    *oper_reason++ = '\0';

  cur_time = CurrentTime;
  current_date = smalldate(cur_time);
  conf = make_conf_item(KLINE_TYPE);
  aconf = map_to_conf(conf);

  DupString(aconf->host, host);
  DupString(aconf->user, user);

  if (tkline_time != 0)
  {
    ircsprintf(buffer, "Temporary K-line %d min. - %s (%s)",
               (int)(tkline_time/60), reason, current_date);
    DupString(aconf->reason, buffer);

    if (oper_reason != NULL)
      DupString(aconf->oper_reason, oper_reason);
    apply_tkline(source_p, conf, tkline_time);
  }
  else
  {
    ircsprintf(buffer, "%s (%s)", reason, current_date);
    DupString(aconf->reason, buffer);

    if (oper_reason != NULL)
      DupString(aconf->oper_reason, oper_reason);
    apply_kline(source_p, conf, current_date, cur_time);
  }
}

/* me_kline - handle remote kline. no propagation */
static void
me_kline(struct Client *client_p, struct Client *source_p,
         int parc, char *parv[])
{
  struct ConfItem *conf=NULL;
  struct AccessItem *aconf=NULL;
  int tkline_time;
  const char* current_date;
  time_t cur_time;
  char *kuser, *khost, *kreason, *oper_reason;

  if (parc != 6 || EmptyString(parv[5]))
    return;

  if (!match(parv[1], me.name))
    return;

  tkline_time = valid_tkline(parv[2], TK_SECONDS);
  kuser = parv[3];
  khost = parv[4];
  kreason = parv[5];

  if ((oper_reason = strchr(kreason, '|')) != NULL)
    *oper_reason++ = '\0';

  cur_time = CurrentTime;
  current_date = smalldate(cur_time);

  if (find_matching_name_conf(ULINE_TYPE, source_p->servptr->name,
                              source_p->username, source_p->host,
                              SHARED_KLINE))
  {
    if (!IsClient(source_p) ||
        already_placed_kline(source_p, kuser, khost, YES))
      return;

    conf = make_conf_item(KLINE_TYPE);
    aconf = map_to_conf(conf);
    DupString(aconf->host, khost);
    DupString(aconf->user, kuser);

    if (tkline_time != 0)
    {
      ircsprintf(buffer, "Temporary K-line %d min. - %s (%s)",
                 (int)(tkline_time/60), kreason, current_date);
      DupString(aconf->reason, buffer);

      if (oper_reason != NULL)
        DupString(aconf->oper_reason, oper_reason);
      apply_tkline(source_p, conf, tkline_time);
    }
    else
    {
      ircsprintf(buffer, "%s (%s)", kreason, current_date);
      DupString(aconf->reason, buffer);

      if (oper_reason != NULL)
        DupString(aconf->oper_reason, oper_reason);
      apply_kline(source_p, conf, current_date, cur_time);
    }
  }
}

static void
ms_kline(struct Client *client_p, struct Client *source_p,
	 int parc, char *parv[])
{
  if (parc != 6 || EmptyString(parv[5]))
    return;

  /* parv[0]  parv[1]        parv[2]      parv[3]  parv[4]  parv[5] */
  /* oper     target_server  tkline_time  user     host     reason */
  sendto_match_servs(source_p, parv[1], CAP_KLN,
                     "KLINE %s %s %s %s :%s",
                     parv[1], parv[2], parv[3], parv[4], parv[5]);

  me_kline(client_p, source_p, parc, parv);
}

/* apply_kline()
 *
 * inputs	-
 * output	- NONE
 * side effects	- kline as given, is added to the hashtable
 *		  and conf file
 */
static void 
apply_kline(struct Client *source_p, struct ConfItem *conf,
	    const char *current_date, time_t cur_time)
{
  struct AccessItem *aconf = map_to_conf(conf);

  add_conf_by_address(CONF_KILL, aconf);
  write_conf_line(source_p, conf, current_date, cur_time);
  /* Now, activate kline against current online clients */
  rehashed_klines = 1;
}

/* apply_tkline()
 *
 * inputs	-
 * output	- NONE
 * side effects	- tkline as given is placed
 */
static void
apply_tkline(struct Client *source_p, struct ConfItem *conf,
             int tkline_time)
{
  struct AccessItem *aconf;

  aconf = (struct AccessItem *)map_to_conf(conf);
  aconf->hold = CurrentTime + tkline_time;
  add_temp_line(conf);
  sendto_realops_flags(UMODE_ALL, L_ALL,
		       "%s added temporary %d min. K-Line for [%s@%s] [%s]",
		       get_oper_name(source_p), tkline_time/60,
		       aconf->user, aconf->host,
		       aconf->reason);
  sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. K-Line [%s@%s]",
	     MyConnect(source_p) ? me.name : ID_or_name(&me, source_p->from),
	     source_p->name, tkline_time/60, aconf->user, aconf->host);
  ilog(L_TRACE, "%s added temporary %d min. K-Line for [%s@%s] [%s]",
       source_p->name, tkline_time/60,
       aconf->user, aconf->host, aconf->reason);
  log_oper_action(LOG_TEMP_KLINE_TYPE, source_p, "[%s@%s] [%s]\n",
		  aconf->user, aconf->host, aconf->reason);
  rehashed_klines = 1;
}

/* apply_tdline()
 *
 * inputs	-
 * output	- NONE
 * side effects	- tkline as given is placed
 */
static void
apply_tdline(struct Client *source_p, struct ConfItem *conf,
	     const char *current_date, int tkline_time)
{
  struct AccessItem *aconf;

  aconf = map_to_conf(conf);
  aconf->hold = CurrentTime + tkline_time;

  add_temp_line(conf);
  sendto_realops_flags(UMODE_ALL, L_ALL,
		       "%s added temporary %d min. D-Line for [%s] [%s]",
		       get_oper_name(source_p), tkline_time/60,
		       aconf->host, aconf->reason);

  sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line [%s]",
	     MyConnect(source_p) ? me.name : ID_or_name(&me, source_p->from),
             source_p->name, tkline_time/60, aconf->host);
  ilog(L_TRACE, "%s added temporary %d min. D-Line for [%s] [%s]",
       source_p->name, tkline_time/60, aconf->host, aconf->reason);
  log_oper_action(LOG_TEMP_DLINE_TYPE, source_p, "[%s@%s] [%s]\n",
		  aconf->user, aconf->host, aconf->reason);
  rehashed_klines = 1;
}

/* mo_dline()
 *
 * inputs	- pointer to server
 *		- pointer to client
 *		- parameter count
 *		- parameter list
 * output	-
 * side effects - D line is added
 *
 */
static void
mo_dline(struct Client *client_p, struct Client *source_p,
         int parc, char *parv[])
{
  char def_reason[] = "No reason";
  char *dlhost, *oper_reason, *reason;
  const char *creason;
  const struct Client *target_p = NULL;
  struct irc_ssaddr daddr;
  struct ConfItem *conf=NULL;
  struct AccessItem *aconf=NULL;
  time_t tkline_time=0;
  int bits, t;
  const char *current_date = NULL;
  time_t cur_time;
  char hostip[HOSTIPLEN];

  if (!IsOperK(source_p))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "kline");
    return;
  }

  if (parse_aline("DLINE", source_p,  parc, parv, AWILD, &dlhost,
                  NULL, &tkline_time, NULL, &reason) < 0)
    return;

  if ((t = parse_netmask(dlhost, NULL, &bits)) == HM_HOST)
  {
    if ((target_p = find_chasing(client_p, source_p, dlhost, NULL)) == NULL)
      return;

    if (!MyConnect(target_p))
    {
      sendto_one(source_p,
                 ":%s NOTICE %s :Can't DLINE nick on another server",
                 me.name, source_p->name);
      return;
    }

    if (IsExemptKline(target_p))
    {
      sendto_one(source_p,
                 ":%s NOTICE %s :%s is E-lined", me.name,
                 source_p->name, target_p->name);
      return;
    }

    irc_getnameinfo((struct sockaddr *)&target_p->localClient->ip,
                    target_p->localClient->ip.ss_len, hostip,
                    sizeof(hostip), NULL, 0, NI_NUMERICHOST);

    dlhost = hostip;
    t = parse_netmask(dlhost, NULL, &bits);
    assert(t == HM_IPV4 || t == HM_IPV6);
  }

  if (bits < 8)
  {
    sendto_one(source_p,
               ":%s NOTICE %s :For safety, bitmasks less than 8 require conf access.",
               me.name, source_p->name);
    return;
  }

#ifdef IPV6
  if (t == HM_IPV6)
    t = AF_INET6;
  else
#endif
    t = AF_INET;

  parse_netmask(dlhost, &daddr, NULL);

  if ((aconf = find_dline_conf(&daddr, t)) != NULL)
  {
    creason = aconf->reason ? aconf->reason : def_reason;
    if (IsConfExemptKline(aconf))
      sendto_one(source_p,
		 ":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s",
		 me.name, source_p->name, dlhost, aconf->host, creason);
    else
      sendto_one(source_p,
		 ":%s NOTICE %s :[%s] already D-lined by [%s] - %s",
		 me.name, source_p->name, dlhost, aconf->host, creason);
    return;
  }

  cur_time = CurrentTime;
  current_date = smalldate(cur_time);

  /* Look for an oper reason */
  if ((oper_reason = strchr(reason, '|')) != NULL)
    *oper_reason++ = '\0';

  if (!valid_comment(source_p, reason, YES))
    return;

  conf = make_conf_item(DLINE_TYPE);
  aconf = map_to_conf(conf);
  DupString(aconf->host, dlhost);

  if (tkline_time != 0)
  {
    ircsprintf(buffer, "Temporary D-line %d min. - %s (%s)",
	       (int)(tkline_time/60), reason, current_date);
    DupString(aconf->reason, buffer);
    if (oper_reason != NULL)
      DupString(aconf->oper_reason, oper_reason);
    apply_tdline(source_p, conf, current_date, tkline_time);
  }
  else
  {
    ircsprintf(buffer, "%s (%s)", reason, current_date);
    DupString(aconf->reason, buffer);
    if (oper_reason != NULL)
      DupString(aconf->oper_reason, oper_reason);
    add_conf_by_address(CONF_DLINE, aconf);
    write_conf_line(source_p, conf, current_date, cur_time);
  }

  rehashed_klines = 1;
}

/* already_placed_kline()
 * inputs	- user to complain to, username & host to check for
 * outputs	- returns 1 on existing K-line, 0 if doesn't exist
 * side effects	- notifies source_p if the K-line already exists
 */
/*
 * Note: This currently works if the new K-line is a special case of an
 *       existing K-line, but not the other way round. To do that we would
 *       have to walk the hash and check every existing K-line. -A1kmm.
 */
static int
already_placed_kline(struct Client *source_p, const char *luser, const char *lhost, int warn)
{
  const char *reason;
  struct irc_ssaddr iphost, *piphost;
  struct AccessItem *aconf;
  int t;

  if ((t = parse_netmask(lhost, &iphost, &t)) != HM_HOST)
  {
#ifdef IPV6
    if (t == HM_IPV6)
      t = AF_INET6;
    else
#endif
      t = AF_INET;
    piphost = &iphost;
  }
  else
  {
    t = 0;
    piphost = NULL;
  }

  if ((aconf = find_conf_by_address(lhost, piphost, CONF_KILL, t, luser, NULL)))
  {
    if (warn)
    {
      reason = aconf->reason ? aconf->reason : "No reason";
      sendto_one(source_p,
                 ":%s NOTICE %s :[%s@%s] already K-Lined by [%s@%s] - %s",
                 me.name, source_p->name, luser, lhost, aconf->user,
                 aconf->host, reason);
    }
    return(1);
  }

  return(0);
}

/*
** mo_unkline
** Added Aug 31, 1997 
** common (Keith Fralick) fralick@gate.net
**
**      parv[0] = sender
**      parv[1] = address to remove
*
*
*/
static void
mo_unkline(struct Client *client_p,struct Client *source_p,
           int parc, char *parv[])
{
  char *target_server = NULL;
  char *user, *host;

  if (!IsOperUnkline(source_p))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "unkline");
    return;
  }

  if (parc < 2 || EmptyString(parv[1]))
  {
    sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
               me.name, source_p->name, "UNKLINE");
    return;
  }

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

  if (target_server != NULL)
  {
     sendto_match_servs(source_p, target_server, CAP_UNKLN,
                        "UNKLINE %s %s %s",
                        target_server, user, host);

    /* Allow ON to apply local unkline as well if it matches */
    if (!match(target_server, me.name))
      return;
  }
  else
    cluster_a_line(source_p, "UNKLINE", CAP_UNKLN, SHARED_UNKLINE,
		   "%s %s", user, host);

  if (remove_tkline_match(host, user))
  {
    sendto_one(source_p,
               ":%s NOTICE %s :Un-klined [%s@%s] from temporary K-Lines",
               me.name, source_p->name, user, host);
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "%s has removed the temporary K-Line for: [%s@%s]",
                         get_oper_name(source_p), user, host);
    ilog(L_NOTICE, "%s removed temporary K-Line for [%s@%s]",
         source_p->name, user, host);
    return;
  }

  if (remove_conf_line(KLINE_TYPE, source_p, user, host) > 0)
  {
    sendto_one(source_p, ":%s NOTICE %s :K-Line for [%s@%s] is removed", 
	       me.name, source_p->name, user,host);
    sendto_realops_flags(UMODE_ALL, L_ALL,
			 "%s has removed the K-Line for: [%s@%s]",
			 get_oper_name(source_p), user, host);
    ilog(L_NOTICE, "%s removed K-Line for [%s@%s]",
	 source_p->name, user, host);
  }
  else
    sendto_one(source_p, ":%s NOTICE %s :No K-Line for [%s@%s] found", 
	       me.name, source_p->name, user, host);
}

/* me_unkline()
 *
 * inputs	- server
 *		- client
 *		- parc
 *		- parv
 * outputs	- none
 * side effects	- if server is authorized, kline is removed
 *                does not propagate message
 */
static void
me_unkline(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  const char *kuser, *khost;

  if (parc != 4)
    return;

  kuser = parv[2];
  khost = parv[3];

  if (!IsClient(source_p) || !match(parv[1], me.name))
    return;

  if (find_matching_name_conf(ULINE_TYPE,
				   source_p->servptr->name,
				   source_p->username, source_p->host,
				   SHARED_UNKLINE))
  {
    if (remove_tkline_match(khost, kuser))
    {
      sendto_one(source_p,
                 ":%s NOTICE %s :Un-klined [%s@%s] from temporary K-Lines",
                 me.name, source_p->name, kuser, khost);
      sendto_realops_flags(UMODE_ALL, L_ALL,  
                           "%s has removed the temporary K-Line for: [%s@%s]",
                           get_oper_name(source_p), kuser, khost);
      ilog(L_NOTICE, "%s removed temporary K-Line for [%s@%s]",
           source_p->name, kuser, khost);
      return;
    }

    if (remove_conf_line(KLINE_TYPE, source_p, kuser, khost) > 0)
    {
      sendto_one(source_p, ":%s NOTICE %s :K-Line for [%s@%s] is removed",
                 me.name, source_p->name, kuser, khost);
      sendto_realops_flags(UMODE_ALL, L_ALL,
                           "%s has removed the K-Line for: [%s@%s]",
                         get_oper_name(source_p), kuser, khost);

      ilog(L_NOTICE, "%s removed K-Line for [%s@%s]",
           source_p->name, kuser, khost);
    }
    else
      sendto_one(source_p, ":%s NOTICE %s :No K-Line for [%s@%s] found",
                 me.name, source_p->name, kuser, khost);
  }
}

/* ms_unkline - propagates and handles a remote unkline message */
static void
ms_unkline(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  if (parc != 4)
    return;

  sendto_match_servs(source_p, parv[1], CAP_UNKLN,
                     "UNKLINE %s %s %s",
                     parv[1], parv[2], parv[3]);

  me_unkline(client_p, source_p, parc, parv);
}

/* static int remove_tkline_match(const char *host, const char *user)
 * Input: A hostname, a username to unkline.
 * Output: returns YES on success, NO if no tkline removed.
 * Side effects: Any matching tklines are removed.
 */
static int
remove_tkline_match(const char *host, const char *user)
{
  struct AccessItem *tk_c;
  dlink_node *tk_n;
  struct irc_ssaddr addr, caddr;
  int nm_t, cnm_t, bits, cbits;
  nm_t = parse_netmask(host, &addr, &bits);

  DLINK_FOREACH(tk_n, temporary_klines.head)
  {
    tk_c = map_to_conf(tk_n->data);
    cnm_t = parse_netmask(tk_c->host, &caddr, &cbits);
    if (cnm_t != nm_t || irccmp(user, tk_c->user))
      continue;
    if ((nm_t==HM_HOST && !irccmp(tk_c->host, host)) ||
	(nm_t==HM_IPV4 && bits==cbits && match_ipv4(&addr, &caddr, bits))
#ifdef IPV6
	|| (nm_t==HM_IPV6 && bits==cbits && match_ipv6(&addr, &caddr, bits))
#endif
	)
      {
	dlinkDelete(tk_n, &temporary_klines);
	delete_one_address_conf(tk_c->host, tk_c);
	return(YES);
      }
  }

  return(NO);
}

/* static int remove_tdline_match(const char *host, const char *user)
 * Input: An ip to undline.
 * Output: returns YES on success, NO if no tdline removed.
 * Side effects: Any matching tdlines are removed.
 */
static int
remove_tdline_match(const char *cidr)
{
  struct AccessItem *td_conf;
  dlink_node *td_node;
  struct irc_ssaddr addr, caddr;
  int nm_t, cnm_t, bits, cbits;
  nm_t = parse_netmask(cidr, &addr, &bits);

  DLINK_FOREACH(td_node, temporary_dlines.head)
  {
    td_conf = map_to_conf(td_node->data);
    cnm_t   = parse_netmask(td_conf->host, &caddr, &cbits);

    if (cnm_t != nm_t)
      continue;

    if((nm_t==HM_HOST && !irccmp(td_conf->host, cidr)) ||
       (nm_t==HM_IPV4 && bits==cbits && match_ipv4(&addr, &caddr, bits))
#ifdef IPV6
       || (nm_t==HM_IPV6 && bits==cbits && match_ipv6(&addr, &caddr, bits))
#endif
      )
    {
      dlinkDelete(td_node, &temporary_dlines);
      delete_one_address_conf(td_conf->host, td_conf);
      return(YES);
    }
  }

  return(NO);
}

/*
** m_undline
** added May 28th 2000 by Toby Verrall <toot@melnet.co.uk>
** based totally on m_unkline
** added to hybrid-7 7/11/2000 --is
**
**      parv[0] = sender nick
**      parv[1] = dline to remove
*/
static void
mo_undline(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  const char  *cidr;

  if (!IsOperUnkline(source_p))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "undline");
    return;
  }

  cidr = parv[1];

  if (remove_tdline_match(cidr))
  {
    sendto_one(source_p,
              ":%s NOTICE %s :Un-Dlined [%s] from temporary D-Lines",
              me.name, source_p->name, cidr);
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "%s has removed the temporary D-Line for: [%s]",
                         get_oper_name(source_p), cidr);
    ilog(L_NOTICE, "%s removed temporary D-Line for [%s]", source_p->name, cidr);
    return;
  }

  if (remove_conf_line(DLINE_TYPE, source_p, cidr, NULL) > 0)
  {
    sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed",
               me.name, source_p->name, cidr);
    sendto_realops_flags(UMODE_ALL, L_ALL,
			 "%s has removed the D-Line for: [%s]",
			 get_oper_name(source_p), cidr);
    ilog(L_NOTICE, "%s removed D-Line for [%s]",
         get_oper_name(source_p), cidr);
  }
  else
    sendto_one(source_p, ":%s NOTICE %s :No D-Line for [%s] found",
               me.name, source_p->name, cidr);
}
