modules/core/m_join.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_join.c: Joins a channel.
 *
 *  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
 *
 *  $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "s_serv.h"
#include "conf.h"
#include "parse.h"
#include "modules.h"


static void do_join_0(struct Client *, struct Client *);

static void set_final_mode(struct Mode *, struct Mode *);
static void remove_our_modes(struct Channel *, struct Client *);
static void remove_a_mode(struct Channel *, struct Client *, int, char);

static char modebuf[MODEBUFLEN];
static char parabuf[MODEBUFLEN];
static char sendbuf[MODEBUFLEN];
static char *mbuf;

/* last0() stolen from ircu */
static char *
last0(struct Client *client_p, struct Client *source_p, char *chanlist)
{
  char *p;
  int join0 = 0;

  for (p = chanlist; *p; ++p) /* find last "JOIN 0" */
  {
    if (*p == '0' && (*(p + 1) == ',' || *(p + 1) == '\0'))
    {
      if ((*p + 1) == ',')
        ++p;

      chanlist = p + 1;
      join0 = 1;
    }
    else
    {
      while (*p != ',' && *p != '\0') /* skip past channel name */
        ++p;

      if (*p == '\0') /* hit the end */
        break;
    }
  }

  if (join0)
    do_join_0(client_p, source_p);

  return chanlist;
}

/* m_join()
 *      parv[0] = sender prefix
 *      parv[1] = channel
 *      parv[2] = channel password (key)
 */
static void
m_join(struct Client *client_p, struct Client *source_p,
       int parc, char *parv[])
{
  char *p = NULL;
  char *key_list = NULL;
  char *chan_list = NULL;
  char *chan = NULL;
  struct Channel *chptr = NULL;
  int i = 0;
  unsigned int flags = 0;

  if (EmptyString(parv[1]))
  {
    sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
               me.name, source_p->name, "JOIN");
    return;
  }

  assert(client_p == source_p);

  key_list = parv[2];
  chan_list = last0(client_p, source_p, parv[1]);

  for (chan = strtoken(&p, chan_list, ","); chan;
       chan = strtoken(&p, NULL,      ","))
  {
    char *key = NULL;

    /* If we have any more keys, take the first for this channel. */
    if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ',')))
      *key_list++ = '\0';

    /* Empty keys are the same as no keys. */
    if (key && *key == '\0')
      key = NULL;

    if (!check_channel_name(chan, 1))
    {
      sendto_one(source_p, form_str(ERR_BADCHANNAME),
                 me.name, source_p->name, chan);
      continue;
    }

    if (ConfigChannel.disable_local_channels && (*chan == '&'))
    {
      sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
                 me.name, source_p->name, chan);
      continue;
    }

    if (!IsExemptResv(source_p) &&
        !(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv) &&
        (!hash_find_resv(chan) == ConfigChannel.restrict_channels))
    {
      sendto_one(source_p, form_str(ERR_BADCHANNAME),
                 me.name, source_p->name, chan);
      sendto_realops_flags(UMODE_SPY, L_ALL,
                           "Forbidding reserved channel [%s] from user %s",
                           chan, get_client_name(source_p, HIDE_IP));
      continue;
    }

    if (dlink_list_length(&source_p->channel) >=
        HasUMode(source_p, UMODE_OPER) ?
        ConfigChannel.max_chans_per_oper :
        ConfigChannel.max_chans_per_user)
    {
      sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
                 me.name, source_p->name, chan);
      break;
    }

    if ((chptr = hash_find_channel(chan)) != NULL)
    {
      if (IsMember(source_p, chptr))
        continue;

      if (splitmode && !HasUMode(source_p, UMODE_OPER) && (*chan != '&') &&
          ConfigChannel.no_join_on_split)
      {
        sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
                   me.name, source_p->name, chan);
        continue;
      }

      /*
       * can_join checks for +i key, bans.
       */
      if ((i = can_join(source_p, chptr, key)))
      {
        sendto_one(source_p, form_str(i), me.name,
                   source_p->name, chptr->chname);
        continue;
      }

      /*
       * This should never be the case unless there is some sort of
       * persistant channels.
       */
      if (dlink_list_length(&chptr->members) == 0)
        flags = CHFL_CHANOP;
      else
        flags = 0;
    }
    else
    {
      if (splitmode && !HasUMode(source_p, UMODE_OPER) && (*chan != '&') &&
          (ConfigChannel.no_create_on_split || ConfigChannel.no_join_on_split))
      {
        sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
                   me.name, source_p->name, chan);
        continue;
      }

      flags = CHFL_CHANOP;
      chptr = make_channel(chan);
    }

    if (!HasUMode(source_p, UMODE_OPER))
      check_spambot_warning(source_p, chptr->chname);

    add_user_to_channel(chptr, source_p, flags, 1);

    /*
     *  Set timestamp if appropriate, and propagate
     */
    if (flags & CHFL_CHANOP)
    {
      chptr->channelts = CurrentTime;
      chptr->mode.mode |= MODE_TOPICLIMIT;
      chptr->mode.mode |= MODE_NOPRIVMSGS;

      sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
                    ":%s SJOIN %lu %s +nt :@%s",
                    me.id, (unsigned long)chptr->channelts,
                    chptr->chname, source_p->id);
      sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
                    ":%s SJOIN %lu %s +nt :@%s",
                    me.name, (unsigned long)chptr->channelts,
                    chptr->chname, source_p->name);
      /*
       * notify all other users on the new channel
       */
      sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
                           source_p->name, source_p->username,
                           source_p->host, chptr->chname);
      sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s +nt",
                           me.name, chptr->chname);
    }
    else
    {
      sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
                    ":%s JOIN %lu %s +",
                    source_p->id, (unsigned long)chptr->channelts,
                    chptr->chname);
      sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
                    ":%s SJOIN %lu %s + :%s",
                    me.name, (unsigned long)chptr->channelts,
                    chptr->chname, source_p->name);

      sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
                           source_p->name, source_p->username,
                           source_p->host, chptr->chname);
    }

    del_invite(chptr, source_p);

    if (chptr->topic[0])
    {
      sendto_one(source_p, form_str(RPL_TOPIC), me.name,
                 source_p->name, chptr->chname, chptr->topic);

      sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
                 me.name, source_p->name, chptr->chname,
                 chptr->topic_info, chptr->topic_time);
    }

    channel_member_names(source_p, chptr, 1);

    source_p->localClient->last_join_time = CurrentTime;
  }
}

/* ms_join()
 *
 * inputs       - parv[0] = uid
 *                parv[1] = ts
 *                parv[2] = channel name
 *                parv[3] = modes (Deprecated)
 * output       - none
 * side effects - handles remote JOIN's sent by servers. In TSora
 *                remote clients are joined using SJOIN, hence a 
 *                JOIN sent by a server on behalf of a client is an error.
 *                here, the initial code is in to take an extra parameter
 *                and use it for the TimeStamp on a new channel.
 */
static void 
ms_join(struct Client *client_p, struct Client *source_p,
        int parc, char *parv[])
{
  time_t newts = 0;
  time_t oldts = 0;
  int keep_our_modes = 1;
  int keep_new_modes = 1;
  int isnew = 0;
  const char *servername = NULL;
  struct Channel *chptr = NULL;
  struct Mode mode, *oldmode;

  if (parc == 2 && !irccmp(parv[1], "0"))
  {
    do_join_0(client_p, source_p);
    return;
  }

  if (parc < 4 || *parv[2] == '&')
    return;

  if (!check_channel_name(parv[2], 0))
  {
    sendto_realops_flags(UMODE_DEBUG, L_ALL,
                         "*** Too long or invalid channel name from %s: %s",
                         client_p->name, parv[2]);
    return;
  }

  mbuf = modebuf;
  mode.mode = mode.limit = 0;
  mode.key[0] = '\0';

  if ((chptr = hash_find_channel(parv[2])) == NULL)
  {
    isnew = 1;
    chptr = make_channel(parv[2]);
  }

  newts   = atol(parv[1]);
  oldts   = chptr->channelts;
  oldmode = &chptr->mode;

  if (ConfigFileEntry.ignore_bogus_ts)
  {
    if (newts < 800000000)
    {
      sendto_realops_flags(UMODE_DEBUG, L_ALL,
                           "*** Bogus TS %lu on %s ignored from %s",
                           (unsigned long)newts, chptr->chname,
                           client_p->name);

      newts = (oldts == 0) ? 0 : 800000000;
    }
  }
  else
  {
    if (!newts && !isnew && oldts)
    {
      sendto_channel_local(ALL_MEMBERS, 0, chptr,
                           ":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
                           me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
      sendto_realops_flags(UMODE_ALL, L_ALL,
                           "Server %s changing TS on %s from %lu to 0",
                           source_p->name, chptr->chname, (unsigned long)oldts);
    }
  }

  if (isnew)
    chptr->channelts = newts;
  else if (newts == 0 || oldts == 0)
    chptr->channelts = 0;
  else if (newts == oldts)
    ;
  else if (newts < oldts)
  {
    keep_our_modes = 0;
    chptr->channelts = newts;
  }
  else
    keep_new_modes = 0;

  if (!keep_new_modes)
    mode = *oldmode;
  else if (keep_our_modes)
  {
    mode.mode |= oldmode->mode;
    if (oldmode->limit > mode.limit)
      mode.limit = oldmode->limit;
    if (strcmp(mode.key, oldmode->key) < 0)
      strcpy(mode.key, oldmode->key);
  }

  set_final_mode(&mode, oldmode);
  chptr->mode = mode;

  /* Lost the TS, other side wins, so remove modes on this side */
  if (!keep_our_modes)
  {
    remove_our_modes(chptr, source_p);

    if (chptr->topic[0])
    {
      set_channel_topic(chptr, "", "", 0);
      sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :",
                           (IsHidden(source_p) ||
                           ConfigServerHide.hide_servers) ?
                           me.name : source_p->name, chptr->chname);
    }

    sendto_channel_local(ALL_MEMBERS, 0, chptr,
                         ":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
                          me.name, chptr->chname, chptr->chname,
                         (unsigned long)oldts, (unsigned long)newts);
  }
   
  if (*modebuf != '\0')
  {
    servername = (ConfigServerHide.hide_servers || IsHidden(source_p)) ?
                  me.name : source_p->name;

    /* This _SHOULD_ be to ALL_MEMBERS
     * It contains only +imnpstlk, etc */
    sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s %s",
                         servername, chptr->chname, modebuf, parabuf);
  }

  if (!IsMember(source_p, chptr))
  {
    add_user_to_channel(chptr, source_p, 0, 1);
    sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
                         source_p->name, source_p->username,
                         source_p->host, chptr->chname);
  }

  sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
                ":%s JOIN %lu %s +",
                ID(source_p), (unsigned long)chptr->channelts, chptr->chname);
  sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
                ":%s SJOIN %lu %s + :%s",
                source_p->servptr->name, (unsigned long)chptr->channelts,
                chptr->chname, source_p->name);
}

/* do_join_0()
 *
 * inputs       - pointer to client doing join 0
 * output       - NONE
 * side effects - Use has decided to join 0. This is legacy
 *                from the days when channels were numbers not names. *sigh*
 *                There is a bunch of evilness necessary here due to
 *                anti spambot code.
 */
static void
do_join_0(struct Client *client_p, struct Client *source_p)
{
  struct Channel *chptr = NULL;
  dlink_node *ptr = NULL, *ptr_next = NULL;

  if (source_p->channel.head)
    if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER))
      check_spambot_warning(source_p, NULL);

  DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->channel.head)
  {
    chptr = ((struct Membership *)ptr->data)->chptr;

    sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
                  ":%s PART %s", ID(source_p), chptr->chname);
    sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
                  ":%s PART %s", source_p->name, chptr->chname);
    sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s PART %s",
                         source_p->name, source_p->username,
                         source_p->host, chptr->chname);

    remove_user_from_channel(ptr->data);
  }
}

/* set_final_mode
 *
 * inputs       - channel mode
 *              - old channel mode
 * output       - NONE
 * side effects - walk through all the channel modes turning off modes
 *                that were on in oldmode but aren't on in mode.
 *                Then walk through turning on modes that are on in mode
 *                but were not set in oldmode.
 */
static void
set_final_mode(struct Mode *mode, struct Mode *oldmode)
{
  const struct mode_letter *tab;
  char *pbuf = parabuf;
  int what   = 0;
  int len;

  for (tab = chan_modes; tab->letter; ++tab)
  {
    if ((tab->mode & mode->mode) &&
        !(tab->mode & oldmode->mode))
    {
      if (what != 1)
      {
        *mbuf++ = '+';
        what = 1;
      }
      *mbuf++ = tab->letter;
    }
  }

  for (tab = chan_modes; tab->letter; ++tab)
  {
    if ((tab->mode & oldmode->mode) &&
        !(tab->mode & mode->mode))
    {
      if (what != -1)
      {
        *mbuf++ = '-';
        what = -1;
      }
      *mbuf++ = tab->letter;
    }
  }

  if (oldmode->limit != 0 && mode->limit == 0)
  {
    if (what != -1)
    {
      *mbuf++ = '-';
      what = -1;
    }
    *mbuf++ = 'l';
  }

  if (oldmode->key[0] && !mode->key[0])
  {
    if (what != -1)
    {
      *mbuf++ = '-';
      what = -1;
    }
    *mbuf++ = 'k';
    len = ircsprintf(pbuf, "%s ", oldmode->key);
    pbuf += len;
  }

  if (mode->limit != 0 && oldmode->limit != mode->limit)
  {
    if (what != 1)
    {
      *mbuf++ = '+';
      what = 1;
    }
    *mbuf++ = 'l';
    len = ircsprintf(pbuf, "%d ", mode->limit);
    pbuf += len;
  }

  if (mode->key[0] && strcmp(oldmode->key, mode->key))
  {
    if (what != 1)
    {
      *mbuf++ = '+';
      what = 1;
    }
    *mbuf++ = 'k';
    len = ircsprintf(pbuf, "%s ", mode->key);
    pbuf += len;
  }
  *mbuf = '\0';
}

/* remove_our_modes()
 *
 * inputs       - pointer to channel to remove modes from
 *              - client pointer
 * output       - NONE
 * side effects - Go through the local members, remove all their
 *                chanop modes etc., this side lost the TS.
 */
static void
remove_our_modes(struct Channel *chptr, struct Client *source_p)
{
  remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
#ifdef HALFOPS
  remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
#endif
  remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
}

/* remove_a_mode()
 *
 * inputs       -
 * output       - NONE
 * side effects - remove ONE mode from a channel
 */
static void
remove_a_mode(struct Channel *chptr, struct Client *source_p,
              int mask, char flag)
{
  dlink_node *ptr;
  struct Membership *ms;
  char lmodebuf[MODEBUFLEN];
  const char *lpara[MAXMODEPARAMS];
  int count = 0;
  int lcount;

  mbuf = lmodebuf;
  *mbuf++ = '-';

  for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
    lpara[lcount] = "";
  sendbuf[0] = '\0';

  DLINK_FOREACH(ptr, chptr->members.head)
  {
    ms = ptr->data;

    if ((ms->flags & mask) == 0)
      continue;

    ms->flags &= ~mask;

    lpara[count++] = ms->client_p->name;

    *mbuf++ = flag;

    if (count >= MAXMODEPARAMS)
    {
      for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
      {
        if (*lpara[lcount] == '\0')
          break;

        strlcat(sendbuf, " ", sizeof(sendbuf));
        strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
        lpara[lcount] = "";
      }

      *mbuf = '\0';
      sendto_channel_local(ALL_MEMBERS, 0, chptr,
                           ":%s MODE %s %s%s",
                           (IsHidden(source_p) ||
                           ConfigServerHide.hide_servers) ?
                           me.name : source_p->name,
                           chptr->chname, lmodebuf, sendbuf);
      mbuf = lmodebuf;
      *mbuf++ = '-';
      count = 0;
      sendbuf[0] = '\0';
    }
  }

  if (count != 0)
  {
    *mbuf = '\0';
    for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
    {
      if (*lpara[lcount] == '\0')
        break;

      strlcat(sendbuf, " ", sizeof(sendbuf));
      strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
    }
    sendto_channel_local(ALL_MEMBERS, 0, chptr,
                         ":%s MODE %s %s%s",
                         (IsHidden(source_p) || ConfigServerHide.hide_servers) ?
                         me.name : source_p->name,
                         chptr->chname, lmodebuf, sendbuf);
  }
}

static struct Message join_msgtab = {
  "JOIN", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_join, ms_join, m_ignore, m_join, m_ignore }
};

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

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

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = MODULE_FLAG_CORE
};
Revision:	1451
Committed:	Fri Jun 29 11:28:25 2012 UTC (11 years, 9 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/core/m_join.c*
File size:	18556 byte(s)
Log Message:	- Style corrections
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_join.c: Joins a channel.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26	michael	1011	#include "list.h"
27	adx	30	#include "channel.h"
28			#include "channel_mode.h"
29			#include "client.h"
30			#include "hash.h"
31			#include "irc_string.h"
32			#include "sprintf_irc.h"
33			#include "ircd.h"
34			#include "numeric.h"
35			#include "send.h"
36			#include "s_serv.h"
37	michael	1309	#include "conf.h"
38	adx	30	#include "parse.h"
39			#include "modules.h"
40
41
42	michael	894	static void do_join_0(struct Client , struct Client );
43	adx	30
44			static void set_final_mode(struct Mode , struct Mode );
45			static void remove_our_modes(struct Channel , struct Client );
46			static void remove_a_mode(struct Channel , struct Client , int, char);
47
48			static char modebuf[MODEBUFLEN];
49			static char parabuf[MODEBUFLEN];
50			static char sendbuf[MODEBUFLEN];
51			static char *mbuf;
52
53	michael	488	/* last0() stolen from ircu */
54			static char *
55			last0(struct Client client_p, struct Client source_p, char *chanlist)
56			{
57			char *p;
58			int join0 = 0;
59
60			for (p = chanlist; p; ++p) / find last "JOIN 0" */
61			{
62			if (p == '0' && ((p + 1) == ',' \|\| *(p + 1) == '\0'))
63			{
64			if ((*p + 1) == ',')
65			++p;
66
67			chanlist = p + 1;
68			join0 = 1;
69			}
70			else
71			{
72			while (p != ',' && p != '\0') /* skip past channel name */
73			++p;
74
75			if (p == '\0') / hit the end */
76			break;
77			}
78			}
79
80			if (join0)
81			do_join_0(client_p, source_p);
82
83			return chanlist;
84			}
85
86	adx	30	/* m_join()
87			* parv[0] = sender prefix
88			* parv[1] = channel
89			* parv[2] = channel password (key)
90			*/
91			static void
92			m_join(struct Client client_p, struct Client source_p,
93			int parc, char *parv[])
94			{
95	michael	488	char *p = NULL;
96			char *key_list = NULL;
97			char *chan_list = NULL;
98			char *chan = NULL;
99	adx	30	struct Channel *chptr = NULL;
100	michael	488	int i = 0;
101	adx	30	unsigned int flags = 0;
102
103	michael	632	if (EmptyString(parv[1]))
104	adx	30	{
105			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
106			me.name, source_p->name, "JOIN");
107			return;
108			}
109
110	michael	487	assert(client_p == source_p);
111	adx	30
112	michael	488	key_list = parv[2];
113			chan_list = last0(client_p, source_p, parv[1]);
114	michael	487
115	michael	488	for (chan = strtoken(&p, chan_list, ","); chan;
116			chan = strtoken(&p, NULL, ","))
117	adx	30	{
118	michael	488	char *key = NULL;
119	adx	30
120	michael	488	/* If we have any more keys, take the first for this channel. */
121			if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ',')))
122			*key_list++ = '\0';
123
124			/* Empty keys are the same as no keys. */
125			if (key && *key == '\0')
126			key = NULL;
127
128	michael	632	if (!check_channel_name(chan, 1))
129	michael	488	{
130			sendto_one(source_p, form_str(ERR_BADCHANNAME),
131			me.name, source_p->name, chan);
132	adx	30	continue;
133	michael	488	}
134	adx	30
135	michael	488	if (ConfigChannel.disable_local_channels && (*chan == '&'))
136			{
137			sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
138			me.name, source_p->name, chan);
139			continue;
140			}
141
142			if (!IsExemptResv(source_p) &&
143	michael	1219	!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv) &&
144	michael	488	(!hash_find_resv(chan) == ConfigChannel.restrict_channels))
145			{
146			sendto_one(source_p, form_str(ERR_BADCHANNAME),
147			me.name, source_p->name, chan);
148			sendto_realops_flags(UMODE_SPY, L_ALL,
149	michael	1451	"Forbidding reserved channel [%s] from user %s",
150			chan, get_client_name(source_p, HIDE_IP));
151	michael	488	continue;
152			}
153
154	michael	1432	if (dlink_list_length(&source_p->channel) >=
155			HasUMode(source_p, UMODE_OPER) ?
156			ConfigChannel.max_chans_per_oper :
157			ConfigChannel.max_chans_per_user)
158	michael	488	{
159	michael	494	sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
160			me.name, source_p->name, chan);
161			break;
162	michael	488	}
163
164			if ((chptr = hash_find_channel(chan)) != NULL)
165			{
166			if (IsMember(source_p, chptr))
167			continue;
168
169	michael	1219	if (splitmode && !HasUMode(source_p, UMODE_OPER) && (*chan != '&') &&
170	michael	488	ConfigChannel.no_join_on_split)
171			{
172			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
173			me.name, source_p->name, chan);
174			continue;
175			}
176
177			/*
178	michael	894	* can_join checks for +i key, bans.
179			*/
180			if ((i = can_join(source_p, chptr, key)))
181			{
182			sendto_one(source_p, form_str(i), me.name,
183			source_p->name, chptr->chname);
184			continue;
185			}
186
187			/*
188	michael	488	* This should never be the case unless there is some sort of
189			* persistant channels.
190			*/
191			if (dlink_list_length(&chptr->members) == 0)
192			flags = CHFL_CHANOP;
193			else
194			flags = 0;
195			}
196			else
197			{
198	michael	1219	if (splitmode && !HasUMode(source_p, UMODE_OPER) && (*chan != '&') &&
199	michael	488	(ConfigChannel.no_create_on_split \|\| ConfigChannel.no_join_on_split))
200			{
201			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
202			me.name, source_p->name, chan);
203			continue;
204			}
205
206			flags = CHFL_CHANOP;
207	michael	632	chptr = make_channel(chan);
208	michael	488	}
209
210	michael	1219	if (!HasUMode(source_p, UMODE_OPER))
211	adx	30	check_spambot_warning(source_p, chptr->chname);
212
213	michael	894	add_user_to_channel(chptr, source_p, flags, 1);
214	adx	30
215			/*
216	michael	488	* Set timestamp if appropriate, and propagate
217			*/
218	adx	30	if (flags & CHFL_CHANOP)
219			{
220			chptr->channelts = CurrentTime;
221			chptr->mode.mode \|= MODE_TOPICLIMIT;
222			chptr->mode.mode \|= MODE_NOPRIVMSGS;
223
224	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
225	adx	30	":%s SJOIN %lu %s +nt :@%s",
226			me.id, (unsigned long)chptr->channelts,
227			chptr->chname, source_p->id);
228	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
229	adx	30	":%s SJOIN %lu %s +nt :@%s",
230			me.name, (unsigned long)chptr->channelts,
231	michael	632	chptr->chname, source_p->name);
232	adx	30	/*
233			* notify all other users on the new channel
234			*/
235	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
236	adx	30	source_p->name, source_p->username,
237			source_p->host, chptr->chname);
238	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s +nt",
239	adx	30	me.name, chptr->chname);
240			}
241			else
242			{
243	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
244	adx	30	":%s JOIN %lu %s +",
245			source_p->id, (unsigned long)chptr->channelts,
246			chptr->chname);
247	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
248	adx	30	":%s SJOIN %lu %s + :%s",
249			me.name, (unsigned long)chptr->channelts,
250			chptr->chname, source_p->name);
251
252	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
253	adx	30	source_p->name, source_p->username,
254			source_p->host, chptr->chname);
255			}
256
257			del_invite(chptr, source_p);
258
259	michael	1203	if (chptr->topic[0])
260	adx	30	{
261			sendto_one(source_p, form_str(RPL_TOPIC), me.name,
262			source_p->name, chptr->chname, chptr->topic);
263
264			sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
265			me.name, source_p->name, chptr->chname,
266			chptr->topic_info, chptr->topic_time);
267			}
268
269			channel_member_names(source_p, chptr, 1);
270
271	michael	487	source_p->localClient->last_join_time = CurrentTime;
272	adx	30	}
273			}
274
275			/* ms_join()
276			*
277			* inputs - parv[0] = uid
278			* parv[1] = ts
279			* parv[2] = channel name
280	db	853	* parv[3] = modes (Deprecated)
281	adx	30	* output - none
282			* side effects - handles remote JOIN's sent by servers. In TSora
283			* remote clients are joined using SJOIN, hence a
284			* JOIN sent by a server on behalf of a client is an error.
285			* here, the initial code is in to take an extra parameter
286			* and use it for the TimeStamp on a new channel.
287			*/
288			static void
289			ms_join(struct Client client_p, struct Client source_p,
290			int parc, char *parv[])
291			{
292	michael	632	time_t newts = 0;
293			time_t oldts = 0;
294			int keep_our_modes = 1;
295			int keep_new_modes = 1;
296			int isnew = 0;
297			const char *servername = NULL;
298			struct Channel *chptr = NULL;
299			struct Mode mode, *oldmode;
300	adx	30
301	michael	632	if (parc == 2 && !irccmp(parv[1], "0"))
302	adx	30	{
303			do_join_0(client_p, source_p);
304			return;
305			}
306
307	michael	632	if (parc < 4 \|\| *parv[2] == '&')
308	adx	30	return;
309
310	michael	632	if (!check_channel_name(parv[2], 0))
311			{
312			sendto_realops_flags(UMODE_DEBUG, L_ALL,
313			"*** Too long or invalid channel name from %s: %s",
314			client_p->name, parv[2]);
315	adx	30	return;
316	michael	632	}
317	adx	30
318			mbuf = modebuf;
319			mode.mode = mode.limit = 0;
320			mode.key[0] = '\0';
321
322	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
323			{
324			isnew = 1;
325			chptr = make_channel(parv[2]);
326			}
327
328			newts = atol(parv[1]);
329	adx	30	oldts = chptr->channelts;
330			oldmode = &chptr->mode;
331
332			if (ConfigFileEntry.ignore_bogus_ts)
333			{
334			if (newts < 800000000)
335			{
336			sendto_realops_flags(UMODE_DEBUG, L_ALL,
337			"*** Bogus TS %lu on %s ignored from %s",
338			(unsigned long)newts, chptr->chname,
339			client_p->name);
340
341			newts = (oldts == 0) ? 0 : 800000000;
342			}
343			}
344			else
345			{
346			if (!newts && !isnew && oldts)
347			{
348	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
349	michael	873	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
350			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
351	adx	30	sendto_realops_flags(UMODE_ALL, L_ALL,
352			"Server %s changing TS on %s from %lu to 0",
353			source_p->name, chptr->chname, (unsigned long)oldts);
354			}
355			}
356
357			if (isnew)
358			chptr->channelts = newts;
359			else if (newts == 0 \|\| oldts == 0)
360			chptr->channelts = 0;
361			else if (newts == oldts)
362			;
363			else if (newts < oldts)
364			{
365	michael	894	keep_our_modes = 0;
366	adx	30	chptr->channelts = newts;
367			}
368			else
369	michael	894	keep_new_modes = 0;
370	adx	30
371			if (!keep_new_modes)
372			mode = *oldmode;
373			else if (keep_our_modes)
374			{
375			mode.mode \|= oldmode->mode;
376			if (oldmode->limit > mode.limit)
377			mode.limit = oldmode->limit;
378			if (strcmp(mode.key, oldmode->key) < 0)
379			strcpy(mode.key, oldmode->key);
380			}
381
382			set_final_mode(&mode, oldmode);
383			chptr->mode = mode;
384
385			/* Lost the TS, other side wins, so remove modes on this side */
386			if (!keep_our_modes)
387			{
388			remove_our_modes(chptr, source_p);
389	michael	873
390	michael	1203	if (chptr->topic[0])
391	michael	873	{
392	michael	1203	set_channel_topic(chptr, "", "", 0);
393	michael	896	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :",
394	michael	873	(IsHidden(source_p) \|\|
395			ConfigServerHide.hide_servers) ?
396			me.name : source_p->name, chptr->chname);
397			}
398
399	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
400	adx	30	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
401			me.name, chptr->chname, chptr->chname,
402			(unsigned long)oldts, (unsigned long)newts);
403			}
404
405			if (*modebuf != '\0')
406			{
407			servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
408			me.name : source_p->name;
409
410			/* This _SHOULD_ be to ALL_MEMBERS
411			* It contains only +imnpstlk, etc */
412	michael	896	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s %s",
413	adx	30	servername, chptr->chname, modebuf, parabuf);
414			}
415
416			if (!IsMember(source_p, chptr))
417			{
418	michael	894	add_user_to_channel(chptr, source_p, 0, 1);
419			sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
420	adx	30	source_p->name, source_p->username,
421			source_p->host, chptr->chname);
422			}
423
424	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
425	adx	30	":%s JOIN %lu %s +",
426			ID(source_p), (unsigned long)chptr->channelts, chptr->chname);
427	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
428	adx	30	":%s SJOIN %lu %s + :%s",
429			source_p->servptr->name, (unsigned long)chptr->channelts,
430			chptr->chname, source_p->name);
431			}
432
433			/* do_join_0()
434			*
435			* inputs - pointer to client doing join 0
436			* output - NONE
437			* side effects - Use has decided to join 0. This is legacy
438			* from the days when channels were numbers not names. sigh
439			* There is a bunch of evilness necessary here due to
440			* anti spambot code.
441			*/
442			static void
443			do_join_0(struct Client client_p, struct Client source_p)
444			{
445			struct Channel *chptr = NULL;
446	michael	488	dlink_node ptr = NULL, ptr_next = NULL;
447	adx	30
448	michael	1219	if (source_p->channel.head)
449			if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER))
450			check_spambot_warning(source_p, NULL);
451	adx	30
452			DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->channel.head)
453			{
454			chptr = ((struct Membership *)ptr->data)->chptr;
455
456	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
457	michael	488	":%s PART %s", ID(source_p), chptr->chname);
458	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
459	michael	488	":%s PART %s", source_p->name, chptr->chname);
460	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s PART %s",
461	michael	488	source_p->name, source_p->username,
462			source_p->host, chptr->chname);
463	adx	30
464	michael	488	remove_user_from_channel(ptr->data);
465	adx	30	}
466			}
467
468	michael	1175	/* set_final_mode
469	adx	30	*
470	michael	1175	* inputs - channel mode
471			* - old channel mode
472	adx	30	* output - NONE
473	michael	1175	* side effects - walk through all the channel modes turning off modes
474			* that were on in oldmode but aren't on in mode.
475			* Then walk through turning on modes that are on in mode
476			* but were not set in oldmode.
477	adx	30	*/
478			static void
479			set_final_mode(struct Mode mode, struct Mode oldmode)
480			{
481	michael	1175	const struct mode_letter *tab;
482	adx	30	char *pbuf = parabuf;
483			int what = 0;
484			int len;
485
486	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
487	adx	30	{
488	michael	1175	if ((tab->mode & mode->mode) &&
489			!(tab->mode & oldmode->mode))
490	adx	30	{
491			if (what != 1)
492			{
493			*mbuf++ = '+';
494			what = 1;
495			}
496	michael	1175	*mbuf++ = tab->letter;
497	adx	30	}
498			}
499
500	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
501	adx	30	{
502	michael	1175	if ((tab->mode & oldmode->mode) &&
503			!(tab->mode & mode->mode))
504	adx	30	{
505			if (what != -1)
506			{
507			*mbuf++ = '-';
508			what = -1;
509			}
510	michael	1175	*mbuf++ = tab->letter;
511	adx	30	}
512			}
513
514			if (oldmode->limit != 0 && mode->limit == 0)
515			{
516			if (what != -1)
517			{
518			*mbuf++ = '-';
519			what = -1;
520			}
521			*mbuf++ = 'l';
522			}
523
524			if (oldmode->key[0] && !mode->key[0])
525			{
526			if (what != -1)
527			{
528			*mbuf++ = '-';
529			what = -1;
530			}
531			*mbuf++ = 'k';
532			len = ircsprintf(pbuf, "%s ", oldmode->key);
533			pbuf += len;
534			}
535
536			if (mode->limit != 0 && oldmode->limit != mode->limit)
537			{
538			if (what != 1)
539			{
540			*mbuf++ = '+';
541			what = 1;
542			}
543			*mbuf++ = 'l';
544			len = ircsprintf(pbuf, "%d ", mode->limit);
545			pbuf += len;
546			}
547
548			if (mode->key[0] && strcmp(oldmode->key, mode->key))
549			{
550			if (what != 1)
551			{
552			*mbuf++ = '+';
553			what = 1;
554			}
555			*mbuf++ = 'k';
556			len = ircsprintf(pbuf, "%s ", mode->key);
557			pbuf += len;
558			}
559			*mbuf = '\0';
560			}
561
562			/* remove_our_modes()
563			*
564			* inputs - pointer to channel to remove modes from
565			* - client pointer
566			* output - NONE
567			* side effects - Go through the local members, remove all their
568			* chanop modes etc., this side lost the TS.
569			*/
570			static void
571			remove_our_modes(struct Channel chptr, struct Client source_p)
572			{
573			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
574			#ifdef HALFOPS
575			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
576			#endif
577			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
578			}
579
580			/* remove_a_mode()
581			*
582			* inputs -
583			* output - NONE
584			* side effects - remove ONE mode from a channel
585			*/
586			static void
587			remove_a_mode(struct Channel chptr, struct Client source_p,
588			int mask, char flag)
589			{
590			dlink_node *ptr;
591			struct Membership *ms;
592			char lmodebuf[MODEBUFLEN];
593			const char *lpara[MAXMODEPARAMS];
594			int count = 0;
595			int lcount;
596
597			mbuf = lmodebuf;
598			*mbuf++ = '-';
599
600			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
601			lpara[lcount] = "";
602			sendbuf[0] = '\0';
603
604			DLINK_FOREACH(ptr, chptr->members.head)
605			{
606			ms = ptr->data;
607
608			if ((ms->flags & mask) == 0)
609			continue;
610
611			ms->flags &= ~mask;
612
613			lpara[count++] = ms->client_p->name;
614
615			*mbuf++ = flag;
616
617			if (count >= MAXMODEPARAMS)
618			{
619			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
620			{
621			if (*lpara[lcount] == '\0')
622			break;
623
624			strlcat(sendbuf, " ", sizeof(sendbuf));
625			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
626			lpara[lcount] = "";
627			}
628
629			*mbuf = '\0';
630	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
631	adx	30	":%s MODE %s %s%s",
632			(IsHidden(source_p) \|\|
633			ConfigServerHide.hide_servers) ?
634			me.name : source_p->name,
635			chptr->chname, lmodebuf, sendbuf);
636			mbuf = lmodebuf;
637			*mbuf++ = '-';
638			count = 0;
639			sendbuf[0] = '\0';
640			}
641			}
642
643			if (count != 0)
644			{
645			*mbuf = '\0';
646			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
647			{
648			if (*lpara[lcount] == '\0')
649			break;
650
651			strlcat(sendbuf, " ", sizeof(sendbuf));
652			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
653			}
654	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
655	adx	30	":%s MODE %s %s%s",
656			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
657			me.name : source_p->name,
658			chptr->chname, lmodebuf, sendbuf);
659			}
660			}
661	michael	1230
662			static struct Message join_msgtab = {
663			"JOIN", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
664			{ m_unregistered, m_join, ms_join, m_ignore, m_join, m_ignore }
665			};
666
667			static void
668			module_init(void)
669			{
670			mod_add_cmd(&join_msgtab);
671			}
672
673			static void
674			module_exit(void)
675			{
676			mod_del_cmd(&join_msgtab);
677			}
678
679			struct module module_entry = {
680			.node = { NULL, NULL, NULL },
681			.name = NULL,
682			.version = "$Revision$",
683			.handle = NULL,
684			.modinit = module_init,
685			.modexit = module_exit,
686			.flags = MODULE_FLAG_CORE
687			};