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 "handlers.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 "s_conf.h"
#include "msg.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,
                           "User %s (%s@%s) is attempting to join locally juped channel %s",
                           source_p->name, source_p->username, source_p->host, chan);
      continue;
    }

    if ((dlink_list_length(&source_p->channel) >= ConfigChannel.max_chans_per_user) &&
        (!HasUMode(source_p, UMODE_OPER) || (dlink_list_length(&source_p->channel) >=
                               ConfigChannel.max_chans_per_user * 3)))
    {
      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:	1230
Committed:	Thu Sep 22 19:41:19 2011 UTC (15 years ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/core/m_join.c*
File size:	18699 byte(s)
Log Message:	- cleanup module loader. Make module api more flexible
#	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 "handlers.h"
28			#include "channel.h"
29			#include "channel_mode.h"
30			#include "client.h"
31			#include "hash.h"
32			#include "irc_string.h"
33			#include "sprintf_irc.h"
34			#include "ircd.h"
35			#include "numeric.h"
36			#include "send.h"
37			#include "s_serv.h"
38			#include "s_conf.h"
39			#include "msg.h"
40			#include "parse.h"
41			#include "modules.h"
42
43
44	michael	894	static void do_join_0(struct Client , struct Client );
45	adx	30
46			static void set_final_mode(struct Mode , struct Mode );
47			static void remove_our_modes(struct Channel , struct Client );
48			static void remove_a_mode(struct Channel , struct Client , int, char);
49
50			static char modebuf[MODEBUFLEN];
51			static char parabuf[MODEBUFLEN];
52			static char sendbuf[MODEBUFLEN];
53			static char *mbuf;
54
55	michael	488	/* last0() stolen from ircu */
56			static char *
57			last0(struct Client client_p, struct Client source_p, char *chanlist)
58			{
59			char *p;
60			int join0 = 0;
61
62			for (p = chanlist; p; ++p) / find last "JOIN 0" */
63			{
64			if (p == '0' && ((p + 1) == ',' \|\| *(p + 1) == '\0'))
65			{
66			if ((*p + 1) == ',')
67			++p;
68
69			chanlist = p + 1;
70			join0 = 1;
71			}
72			else
73			{
74			while (p != ',' && p != '\0') /* skip past channel name */
75			++p;
76
77			if (p == '\0') / hit the end */
78			break;
79			}
80			}
81
82			if (join0)
83			do_join_0(client_p, source_p);
84
85			return chanlist;
86			}
87
88	adx	30	/* m_join()
89			* parv[0] = sender prefix
90			* parv[1] = channel
91			* parv[2] = channel password (key)
92			*/
93			static void
94			m_join(struct Client client_p, struct Client source_p,
95			int parc, char *parv[])
96			{
97	michael	488	char *p = NULL;
98			char *key_list = NULL;
99			char *chan_list = NULL;
100			char *chan = NULL;
101	adx	30	struct Channel *chptr = NULL;
102	michael	488	int i = 0;
103	adx	30	unsigned int flags = 0;
104
105	michael	632	if (EmptyString(parv[1]))
106	adx	30	{
107			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
108			me.name, source_p->name, "JOIN");
109			return;
110			}
111
112	michael	487	assert(client_p == source_p);
113	adx	30
114	michael	488	key_list = parv[2];
115			chan_list = last0(client_p, source_p, parv[1]);
116	michael	487
117	michael	488	for (chan = strtoken(&p, chan_list, ","); chan;
118			chan = strtoken(&p, NULL, ","))
119	adx	30	{
120	michael	488	char *key = NULL;
121	adx	30
122	michael	488	/* If we have any more keys, take the first for this channel. */
123			if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ',')))
124			*key_list++ = '\0';
125
126			/* Empty keys are the same as no keys. */
127			if (key && *key == '\0')
128			key = NULL;
129
130	michael	632	if (!check_channel_name(chan, 1))
131	michael	488	{
132			sendto_one(source_p, form_str(ERR_BADCHANNAME),
133			me.name, source_p->name, chan);
134	adx	30	continue;
135	michael	488	}
136	adx	30
137	michael	488	if (ConfigChannel.disable_local_channels && (*chan == '&'))
138			{
139			sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
140			me.name, source_p->name, chan);
141			continue;
142			}
143
144			if (!IsExemptResv(source_p) &&
145	michael	1219	!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv) &&
146	michael	488	(!hash_find_resv(chan) == ConfigChannel.restrict_channels))
147			{
148			sendto_one(source_p, form_str(ERR_BADCHANNAME),
149			me.name, source_p->name, chan);
150			sendto_realops_flags(UMODE_SPY, L_ALL,
151			"User %s (%s@%s) is attempting to join locally juped channel %s",
152			source_p->name, source_p->username, source_p->host, chan);
153			continue;
154			}
155
156			if ((dlink_list_length(&source_p->channel) >= ConfigChannel.max_chans_per_user) &&
157	michael	1219	(!HasUMode(source_p, UMODE_OPER) \|\| (dlink_list_length(&source_p->channel) >=
158	michael	488	ConfigChannel.max_chans_per_user * 3)))
159			{
160	michael	494	sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
161			me.name, source_p->name, chan);
162			break;
163	michael	488	}
164
165			if ((chptr = hash_find_channel(chan)) != NULL)
166			{
167			if (IsMember(source_p, chptr))
168			continue;
169
170	michael	1219	if (splitmode && !HasUMode(source_p, UMODE_OPER) && (*chan != '&') &&
171	michael	488	ConfigChannel.no_join_on_split)
172			{
173			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
174			me.name, source_p->name, chan);
175			continue;
176			}
177
178			/*
179	michael	894	* can_join checks for +i key, bans.
180			*/
181			if ((i = can_join(source_p, chptr, key)))
182			{
183			sendto_one(source_p, form_str(i), me.name,
184			source_p->name, chptr->chname);
185			continue;
186			}
187
188			/*
189	michael	488	* This should never be the case unless there is some sort of
190			* persistant channels.
191			*/
192			if (dlink_list_length(&chptr->members) == 0)
193			flags = CHFL_CHANOP;
194			else
195			flags = 0;
196			}
197			else
198			{
199	michael	1219	if (splitmode && !HasUMode(source_p, UMODE_OPER) && (*chan != '&') &&
200	michael	488	(ConfigChannel.no_create_on_split \|\| ConfigChannel.no_join_on_split))
201			{
202			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
203			me.name, source_p->name, chan);
204			continue;
205			}
206
207			flags = CHFL_CHANOP;
208	michael	632	chptr = make_channel(chan);
209	michael	488	}
210
211	michael	1219	if (!HasUMode(source_p, UMODE_OPER))
212	adx	30	check_spambot_warning(source_p, chptr->chname);
213
214	michael	894	add_user_to_channel(chptr, source_p, flags, 1);
215	adx	30
216			/*
217	michael	488	* Set timestamp if appropriate, and propagate
218			*/
219	adx	30	if (flags & CHFL_CHANOP)
220			{
221			chptr->channelts = CurrentTime;
222			chptr->mode.mode \|= MODE_TOPICLIMIT;
223			chptr->mode.mode \|= MODE_NOPRIVMSGS;
224
225	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
226	adx	30	":%s SJOIN %lu %s +nt :@%s",
227			me.id, (unsigned long)chptr->channelts,
228			chptr->chname, source_p->id);
229	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
230	adx	30	":%s SJOIN %lu %s +nt :@%s",
231			me.name, (unsigned long)chptr->channelts,
232	michael	632	chptr->chname, source_p->name);
233	adx	30	/*
234			* notify all other users on the new channel
235			*/
236	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
237	adx	30	source_p->name, source_p->username,
238			source_p->host, chptr->chname);
239	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s +nt",
240	adx	30	me.name, chptr->chname);
241			}
242			else
243			{
244	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
245	adx	30	":%s JOIN %lu %s +",
246			source_p->id, (unsigned long)chptr->channelts,
247			chptr->chname);
248	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
249	adx	30	":%s SJOIN %lu %s + :%s",
250			me.name, (unsigned long)chptr->channelts,
251			chptr->chname, source_p->name);
252
253	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
254	adx	30	source_p->name, source_p->username,
255			source_p->host, chptr->chname);
256			}
257
258			del_invite(chptr, source_p);
259
260	michael	1203	if (chptr->topic[0])
261	adx	30	{
262			sendto_one(source_p, form_str(RPL_TOPIC), me.name,
263			source_p->name, chptr->chname, chptr->topic);
264
265			sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
266			me.name, source_p->name, chptr->chname,
267			chptr->topic_info, chptr->topic_time);
268			}
269
270			channel_member_names(source_p, chptr, 1);
271
272	michael	487	source_p->localClient->last_join_time = CurrentTime;
273	adx	30	}
274			}
275
276			/* ms_join()
277			*
278			* inputs - parv[0] = uid
279			* parv[1] = ts
280			* parv[2] = channel name
281	db	853	* parv[3] = modes (Deprecated)
282	adx	30	* output - none
283			* side effects - handles remote JOIN's sent by servers. In TSora
284			* remote clients are joined using SJOIN, hence a
285			* JOIN sent by a server on behalf of a client is an error.
286			* here, the initial code is in to take an extra parameter
287			* and use it for the TimeStamp on a new channel.
288			*/
289			static void
290			ms_join(struct Client client_p, struct Client source_p,
291			int parc, char *parv[])
292			{
293	michael	632	time_t newts = 0;
294			time_t oldts = 0;
295			int keep_our_modes = 1;
296			int keep_new_modes = 1;
297			int isnew = 0;
298			const char *servername = NULL;
299			struct Channel *chptr = NULL;
300			struct Mode mode, *oldmode;
301	adx	30
302	michael	632	if (parc == 2 && !irccmp(parv[1], "0"))
303	adx	30	{
304			do_join_0(client_p, source_p);
305			return;
306			}
307
308	michael	632	if (parc < 4 \|\| *parv[2] == '&')
309	adx	30	return;
310
311	michael	632	if (!check_channel_name(parv[2], 0))
312			{
313			sendto_realops_flags(UMODE_DEBUG, L_ALL,
314			"*** Too long or invalid channel name from %s: %s",
315			client_p->name, parv[2]);
316	adx	30	return;
317	michael	632	}
318	adx	30
319			mbuf = modebuf;
320			mode.mode = mode.limit = 0;
321			mode.key[0] = '\0';
322
323	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
324			{
325			isnew = 1;
326			chptr = make_channel(parv[2]);
327			}
328
329			newts = atol(parv[1]);
330	adx	30	oldts = chptr->channelts;
331			oldmode = &chptr->mode;
332
333			if (ConfigFileEntry.ignore_bogus_ts)
334			{
335			if (newts < 800000000)
336			{
337			sendto_realops_flags(UMODE_DEBUG, L_ALL,
338			"*** Bogus TS %lu on %s ignored from %s",
339			(unsigned long)newts, chptr->chname,
340			client_p->name);
341
342			newts = (oldts == 0) ? 0 : 800000000;
343			}
344			}
345			else
346			{
347			if (!newts && !isnew && oldts)
348			{
349	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
350	michael	873	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
351			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
352	adx	30	sendto_realops_flags(UMODE_ALL, L_ALL,
353			"Server %s changing TS on %s from %lu to 0",
354			source_p->name, chptr->chname, (unsigned long)oldts);
355			}
356			}
357
358			if (isnew)
359			chptr->channelts = newts;
360			else if (newts == 0 \|\| oldts == 0)
361			chptr->channelts = 0;
362			else if (newts == oldts)
363			;
364			else if (newts < oldts)
365			{
366	michael	894	keep_our_modes = 0;
367	adx	30	chptr->channelts = newts;
368			}
369			else
370	michael	894	keep_new_modes = 0;
371	adx	30
372			if (!keep_new_modes)
373			mode = *oldmode;
374			else if (keep_our_modes)
375			{
376			mode.mode \|= oldmode->mode;
377			if (oldmode->limit > mode.limit)
378			mode.limit = oldmode->limit;
379			if (strcmp(mode.key, oldmode->key) < 0)
380			strcpy(mode.key, oldmode->key);
381			}
382
383			set_final_mode(&mode, oldmode);
384			chptr->mode = mode;
385
386			/* Lost the TS, other side wins, so remove modes on this side */
387			if (!keep_our_modes)
388			{
389			remove_our_modes(chptr, source_p);
390	michael	873
391	michael	1203	if (chptr->topic[0])
392	michael	873	{
393	michael	1203	set_channel_topic(chptr, "", "", 0);
394	michael	896	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :",
395	michael	873	(IsHidden(source_p) \|\|
396			ConfigServerHide.hide_servers) ?
397			me.name : source_p->name, chptr->chname);
398			}
399
400	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
401	adx	30	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
402			me.name, chptr->chname, chptr->chname,
403			(unsigned long)oldts, (unsigned long)newts);
404			}
405
406			if (*modebuf != '\0')
407			{
408			servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
409			me.name : source_p->name;
410
411			/* This _SHOULD_ be to ALL_MEMBERS
412			* It contains only +imnpstlk, etc */
413	michael	896	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s %s",
414	adx	30	servername, chptr->chname, modebuf, parabuf);
415			}
416
417			if (!IsMember(source_p, chptr))
418			{
419	michael	894	add_user_to_channel(chptr, source_p, 0, 1);
420			sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
421	adx	30	source_p->name, source_p->username,
422			source_p->host, chptr->chname);
423			}
424
425	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
426	adx	30	":%s JOIN %lu %s +",
427			ID(source_p), (unsigned long)chptr->channelts, chptr->chname);
428	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
429	adx	30	":%s SJOIN %lu %s + :%s",
430			source_p->servptr->name, (unsigned long)chptr->channelts,
431			chptr->chname, source_p->name);
432			}
433
434			/* do_join_0()
435			*
436			* inputs - pointer to client doing join 0
437			* output - NONE
438			* side effects - Use has decided to join 0. This is legacy
439			* from the days when channels were numbers not names. sigh
440			* There is a bunch of evilness necessary here due to
441			* anti spambot code.
442			*/
443			static void
444			do_join_0(struct Client client_p, struct Client source_p)
445			{
446			struct Channel *chptr = NULL;
447	michael	488	dlink_node ptr = NULL, ptr_next = NULL;
448	adx	30
449	michael	1219	if (source_p->channel.head)
450			if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER))
451			check_spambot_warning(source_p, NULL);
452	adx	30
453			DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->channel.head)
454			{
455			chptr = ((struct Membership *)ptr->data)->chptr;
456
457	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
458	michael	488	":%s PART %s", ID(source_p), chptr->chname);
459	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
460	michael	488	":%s PART %s", source_p->name, chptr->chname);
461	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s PART %s",
462	michael	488	source_p->name, source_p->username,
463			source_p->host, chptr->chname);
464	adx	30
465	michael	488	remove_user_from_channel(ptr->data);
466	adx	30	}
467			}
468
469	michael	1175	/* set_final_mode
470	adx	30	*
471	michael	1175	* inputs - channel mode
472			* - old channel mode
473	adx	30	* output - NONE
474	michael	1175	* side effects - walk through all the channel modes turning off modes
475			* that were on in oldmode but aren't on in mode.
476			* Then walk through turning on modes that are on in mode
477			* but were not set in oldmode.
478	adx	30	*/
479			static void
480			set_final_mode(struct Mode mode, struct Mode oldmode)
481			{
482	michael	1175	const struct mode_letter *tab;
483	adx	30	char *pbuf = parabuf;
484			int what = 0;
485			int len;
486
487	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
488	adx	30	{
489	michael	1175	if ((tab->mode & mode->mode) &&
490			!(tab->mode & oldmode->mode))
491	adx	30	{
492			if (what != 1)
493			{
494			*mbuf++ = '+';
495			what = 1;
496			}
497	michael	1175	*mbuf++ = tab->letter;
498	adx	30	}
499			}
500
501	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
502	adx	30	{
503	michael	1175	if ((tab->mode & oldmode->mode) &&
504			!(tab->mode & mode->mode))
505	adx	30	{
506			if (what != -1)
507			{
508			*mbuf++ = '-';
509			what = -1;
510			}
511	michael	1175	*mbuf++ = tab->letter;
512	adx	30	}
513			}
514
515			if (oldmode->limit != 0 && mode->limit == 0)
516			{
517			if (what != -1)
518			{
519			*mbuf++ = '-';
520			what = -1;
521			}
522			*mbuf++ = 'l';
523			}
524
525			if (oldmode->key[0] && !mode->key[0])
526			{
527			if (what != -1)
528			{
529			*mbuf++ = '-';
530			what = -1;
531			}
532			*mbuf++ = 'k';
533			len = ircsprintf(pbuf, "%s ", oldmode->key);
534			pbuf += len;
535			}
536
537			if (mode->limit != 0 && oldmode->limit != mode->limit)
538			{
539			if (what != 1)
540			{
541			*mbuf++ = '+';
542			what = 1;
543			}
544			*mbuf++ = 'l';
545			len = ircsprintf(pbuf, "%d ", mode->limit);
546			pbuf += len;
547			}
548
549			if (mode->key[0] && strcmp(oldmode->key, mode->key))
550			{
551			if (what != 1)
552			{
553			*mbuf++ = '+';
554			what = 1;
555			}
556			*mbuf++ = 'k';
557			len = ircsprintf(pbuf, "%s ", mode->key);
558			pbuf += len;
559			}
560			*mbuf = '\0';
561			}
562
563			/* remove_our_modes()
564			*
565			* inputs - pointer to channel to remove modes from
566			* - client pointer
567			* output - NONE
568			* side effects - Go through the local members, remove all their
569			* chanop modes etc., this side lost the TS.
570			*/
571			static void
572			remove_our_modes(struct Channel chptr, struct Client source_p)
573			{
574			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
575			#ifdef HALFOPS
576			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
577			#endif
578			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
579			}
580
581			/* remove_a_mode()
582			*
583			* inputs -
584			* output - NONE
585			* side effects - remove ONE mode from a channel
586			*/
587			static void
588			remove_a_mode(struct Channel chptr, struct Client source_p,
589			int mask, char flag)
590			{
591			dlink_node *ptr;
592			struct Membership *ms;
593			char lmodebuf[MODEBUFLEN];
594			const char *lpara[MAXMODEPARAMS];
595			int count = 0;
596			int lcount;
597
598			mbuf = lmodebuf;
599			*mbuf++ = '-';
600
601			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
602			lpara[lcount] = "";
603			sendbuf[0] = '\0';
604
605			DLINK_FOREACH(ptr, chptr->members.head)
606			{
607			ms = ptr->data;
608
609			if ((ms->flags & mask) == 0)
610			continue;
611
612			ms->flags &= ~mask;
613
614			lpara[count++] = ms->client_p->name;
615
616			*mbuf++ = flag;
617
618			if (count >= MAXMODEPARAMS)
619			{
620			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
621			{
622			if (*lpara[lcount] == '\0')
623			break;
624
625			strlcat(sendbuf, " ", sizeof(sendbuf));
626			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
627			lpara[lcount] = "";
628			}
629
630			*mbuf = '\0';
631	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
632	adx	30	":%s MODE %s %s%s",
633			(IsHidden(source_p) \|\|
634			ConfigServerHide.hide_servers) ?
635			me.name : source_p->name,
636			chptr->chname, lmodebuf, sendbuf);
637			mbuf = lmodebuf;
638			*mbuf++ = '-';
639			count = 0;
640			sendbuf[0] = '\0';
641			}
642			}
643
644			if (count != 0)
645			{
646			*mbuf = '\0';
647			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
648			{
649			if (*lpara[lcount] == '\0')
650			break;
651
652			strlcat(sendbuf, " ", sizeof(sendbuf));
653			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
654			}
655	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
656	adx	30	":%s MODE %s %s%s",
657			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
658			me.name : source_p->name,
659			chptr->chname, lmodebuf, sendbuf);
660			}
661			}
662	michael	1230
663			static struct Message join_msgtab = {
664			"JOIN", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
665			{ m_unregistered, m_join, ms_join, m_ignore, m_join, m_ignore }
666			};
667
668			static void
669			module_init(void)
670			{
671			mod_add_cmd(&join_msgtab);
672			}
673
674			static void
675			module_exit(void)
676			{
677			mod_del_cmd(&join_msgtab);
678			}
679
680			struct module module_entry = {
681			.node = { NULL, NULL, NULL },
682			.name = NULL,
683			.version = "$Revision$",
684			.handle = NULL,
685			.modinit = module_init,
686			.modexit = module_exit,
687			.flags = MODULE_FLAG_CORE
688			};