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 m_join(struct Client *, struct Client *, int, char *[]);
static void ms_join(struct Client *, struct Client *, int, char *[]);
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;

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

void
_modinit(void)
{
  mod_add_cmd(&join_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&join_msgtab);
}

const char *_version = "$Revision$";

/* 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);
  }
}
Revision:	1219
Committed:	Sun Sep 18 09:02:38 2011 UTC (15 years ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/core/m_join.c*
File size:	18634 byte(s)
Log Message:	- Start cleaning up macros in client.h. Replace several ClientHasSomeCoolFlag() with simple HasFlag/HasUMode macros.
#	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 m_join(struct Client , struct Client , int, char *[]);
45			static void ms_join(struct Client , struct Client , int, char *[]);
46			static void do_join_0(struct Client , struct Client );
47	adx	30
48			static void set_final_mode(struct Mode , struct Mode );
49			static void remove_our_modes(struct Channel , struct Client );
50			static void remove_a_mode(struct Channel , struct Client , int, char);
51
52			static char modebuf[MODEBUFLEN];
53			static char parabuf[MODEBUFLEN];
54			static char sendbuf[MODEBUFLEN];
55			static char *mbuf;
56
57			struct Message join_msgtab = {
58	michael	1178	"JOIN", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
59	michael	894	{ m_unregistered, m_join, ms_join, m_ignore, m_join, m_ignore }
60	adx	30	};
61
62			void
63			_modinit(void)
64			{
65			mod_add_cmd(&join_msgtab);
66			}
67
68			void
69			_moddeinit(void)
70			{
71			mod_del_cmd(&join_msgtab);
72			}
73
74	knight	31	const char *_version = "$Revision$";
75	adx	30
76	michael	488	/* last0() stolen from ircu */
77			static char *
78			last0(struct Client client_p, struct Client source_p, char *chanlist)
79			{
80			char *p;
81			int join0 = 0;
82
83			for (p = chanlist; p; ++p) / find last "JOIN 0" */
84			{
85			if (p == '0' && ((p + 1) == ',' \|\| *(p + 1) == '\0'))
86			{
87			if ((*p + 1) == ',')
88			++p;
89
90			chanlist = p + 1;
91			join0 = 1;
92			}
93			else
94			{
95			while (p != ',' && p != '\0') /* skip past channel name */
96			++p;
97
98			if (p == '\0') / hit the end */
99			break;
100			}
101			}
102
103			if (join0)
104			do_join_0(client_p, source_p);
105
106			return chanlist;
107			}
108
109	adx	30	/* m_join()
110			* parv[0] = sender prefix
111			* parv[1] = channel
112			* parv[2] = channel password (key)
113			*/
114			static void
115			m_join(struct Client client_p, struct Client source_p,
116			int parc, char *parv[])
117			{
118	michael	488	char *p = NULL;
119			char *key_list = NULL;
120			char *chan_list = NULL;
121			char *chan = NULL;
122	adx	30	struct Channel *chptr = NULL;
123	michael	488	int i = 0;
124	adx	30	unsigned int flags = 0;
125
126	michael	632	if (EmptyString(parv[1]))
127	adx	30	{
128			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
129			me.name, source_p->name, "JOIN");
130			return;
131			}
132
133	michael	487	assert(client_p == source_p);
134	adx	30
135	michael	488	key_list = parv[2];
136			chan_list = last0(client_p, source_p, parv[1]);
137	michael	487
138	michael	488	for (chan = strtoken(&p, chan_list, ","); chan;
139			chan = strtoken(&p, NULL, ","))
140	adx	30	{
141	michael	488	char *key = NULL;
142	adx	30
143	michael	488	/* If we have any more keys, take the first for this channel. */
144			if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ',')))
145			*key_list++ = '\0';
146
147			/* Empty keys are the same as no keys. */
148			if (key && *key == '\0')
149			key = NULL;
150
151	michael	632	if (!check_channel_name(chan, 1))
152	michael	488	{
153			sendto_one(source_p, form_str(ERR_BADCHANNAME),
154			me.name, source_p->name, chan);
155	adx	30	continue;
156	michael	488	}
157	adx	30
158	michael	488	if (ConfigChannel.disable_local_channels && (*chan == '&'))
159			{
160			sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
161			me.name, source_p->name, chan);
162			continue;
163			}
164
165			if (!IsExemptResv(source_p) &&
166	michael	1219	!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv) &&
167	michael	488	(!hash_find_resv(chan) == ConfigChannel.restrict_channels))
168			{
169			sendto_one(source_p, form_str(ERR_BADCHANNAME),
170			me.name, source_p->name, chan);
171			sendto_realops_flags(UMODE_SPY, L_ALL,
172			"User %s (%s@%s) is attempting to join locally juped channel %s",
173			source_p->name, source_p->username, source_p->host, chan);
174			continue;
175			}
176
177			if ((dlink_list_length(&source_p->channel) >= ConfigChannel.max_chans_per_user) &&
178	michael	1219	(!HasUMode(source_p, UMODE_OPER) \|\| (dlink_list_length(&source_p->channel) >=
179	michael	488	ConfigChannel.max_chans_per_user * 3)))
180			{
181	michael	494	sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
182			me.name, source_p->name, chan);
183			break;
184	michael	488	}
185
186			if ((chptr = hash_find_channel(chan)) != NULL)
187			{
188			if (IsMember(source_p, chptr))
189			continue;
190
191	michael	1219	if (splitmode && !HasUMode(source_p, UMODE_OPER) && (*chan != '&') &&
192	michael	488	ConfigChannel.no_join_on_split)
193			{
194			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
195			me.name, source_p->name, chan);
196			continue;
197			}
198
199			/*
200	michael	894	* can_join checks for +i key, bans.
201			*/
202			if ((i = can_join(source_p, chptr, key)))
203			{
204			sendto_one(source_p, form_str(i), me.name,
205			source_p->name, chptr->chname);
206			continue;
207			}
208
209			/*
210	michael	488	* This should never be the case unless there is some sort of
211			* persistant channels.
212			*/
213			if (dlink_list_length(&chptr->members) == 0)
214			flags = CHFL_CHANOP;
215			else
216			flags = 0;
217			}
218			else
219			{
220	michael	1219	if (splitmode && !HasUMode(source_p, UMODE_OPER) && (*chan != '&') &&
221	michael	488	(ConfigChannel.no_create_on_split \|\| ConfigChannel.no_join_on_split))
222			{
223			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
224			me.name, source_p->name, chan);
225			continue;
226			}
227
228			flags = CHFL_CHANOP;
229	michael	632	chptr = make_channel(chan);
230	michael	488	}
231
232	michael	1219	if (!HasUMode(source_p, UMODE_OPER))
233	adx	30	check_spambot_warning(source_p, chptr->chname);
234
235	michael	894	add_user_to_channel(chptr, source_p, flags, 1);
236	adx	30
237			/*
238	michael	488	* Set timestamp if appropriate, and propagate
239			*/
240	adx	30	if (flags & CHFL_CHANOP)
241			{
242			chptr->channelts = CurrentTime;
243			chptr->mode.mode \|= MODE_TOPICLIMIT;
244			chptr->mode.mode \|= MODE_NOPRIVMSGS;
245
246	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
247	adx	30	":%s SJOIN %lu %s +nt :@%s",
248			me.id, (unsigned long)chptr->channelts,
249			chptr->chname, source_p->id);
250	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
251	adx	30	":%s SJOIN %lu %s +nt :@%s",
252			me.name, (unsigned long)chptr->channelts,
253	michael	632	chptr->chname, source_p->name);
254	adx	30	/*
255			* notify all other users on the new channel
256			*/
257	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
258	adx	30	source_p->name, source_p->username,
259			source_p->host, chptr->chname);
260	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s +nt",
261	adx	30	me.name, chptr->chname);
262			}
263			else
264			{
265	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
266	adx	30	":%s JOIN %lu %s +",
267			source_p->id, (unsigned long)chptr->channelts,
268			chptr->chname);
269	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
270	adx	30	":%s SJOIN %lu %s + :%s",
271			me.name, (unsigned long)chptr->channelts,
272			chptr->chname, source_p->name);
273
274	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
275	adx	30	source_p->name, source_p->username,
276			source_p->host, chptr->chname);
277			}
278
279			del_invite(chptr, source_p);
280
281	michael	1203	if (chptr->topic[0])
282	adx	30	{
283			sendto_one(source_p, form_str(RPL_TOPIC), me.name,
284			source_p->name, chptr->chname, chptr->topic);
285
286			sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
287			me.name, source_p->name, chptr->chname,
288			chptr->topic_info, chptr->topic_time);
289			}
290
291			channel_member_names(source_p, chptr, 1);
292
293	michael	487	source_p->localClient->last_join_time = CurrentTime;
294	adx	30	}
295			}
296
297			/* ms_join()
298			*
299			* inputs - parv[0] = uid
300			* parv[1] = ts
301			* parv[2] = channel name
302	db	853	* parv[3] = modes (Deprecated)
303	adx	30	* output - none
304			* side effects - handles remote JOIN's sent by servers. In TSora
305			* remote clients are joined using SJOIN, hence a
306			* JOIN sent by a server on behalf of a client is an error.
307			* here, the initial code is in to take an extra parameter
308			* and use it for the TimeStamp on a new channel.
309			*/
310			static void
311			ms_join(struct Client client_p, struct Client source_p,
312			int parc, char *parv[])
313			{
314	michael	632	time_t newts = 0;
315			time_t oldts = 0;
316			int keep_our_modes = 1;
317			int keep_new_modes = 1;
318			int isnew = 0;
319			const char *servername = NULL;
320			struct Channel *chptr = NULL;
321			struct Mode mode, *oldmode;
322	adx	30
323	michael	632	if (parc == 2 && !irccmp(parv[1], "0"))
324	adx	30	{
325			do_join_0(client_p, source_p);
326			return;
327			}
328
329	michael	632	if (parc < 4 \|\| *parv[2] == '&')
330	adx	30	return;
331
332	michael	632	if (!check_channel_name(parv[2], 0))
333			{
334			sendto_realops_flags(UMODE_DEBUG, L_ALL,
335			"*** Too long or invalid channel name from %s: %s",
336			client_p->name, parv[2]);
337	adx	30	return;
338	michael	632	}
339	adx	30
340			mbuf = modebuf;
341			mode.mode = mode.limit = 0;
342			mode.key[0] = '\0';
343
344	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
345			{
346			isnew = 1;
347			chptr = make_channel(parv[2]);
348			}
349
350			newts = atol(parv[1]);
351	adx	30	oldts = chptr->channelts;
352			oldmode = &chptr->mode;
353
354			if (ConfigFileEntry.ignore_bogus_ts)
355			{
356			if (newts < 800000000)
357			{
358			sendto_realops_flags(UMODE_DEBUG, L_ALL,
359			"*** Bogus TS %lu on %s ignored from %s",
360			(unsigned long)newts, chptr->chname,
361			client_p->name);
362
363			newts = (oldts == 0) ? 0 : 800000000;
364			}
365			}
366			else
367			{
368			if (!newts && !isnew && oldts)
369			{
370	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
371	michael	873	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
372			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
373	adx	30	sendto_realops_flags(UMODE_ALL, L_ALL,
374			"Server %s changing TS on %s from %lu to 0",
375			source_p->name, chptr->chname, (unsigned long)oldts);
376			}
377			}
378
379			if (isnew)
380			chptr->channelts = newts;
381			else if (newts == 0 \|\| oldts == 0)
382			chptr->channelts = 0;
383			else if (newts == oldts)
384			;
385			else if (newts < oldts)
386			{
387	michael	894	keep_our_modes = 0;
388	adx	30	chptr->channelts = newts;
389			}
390			else
391	michael	894	keep_new_modes = 0;
392	adx	30
393			if (!keep_new_modes)
394			mode = *oldmode;
395			else if (keep_our_modes)
396			{
397			mode.mode \|= oldmode->mode;
398			if (oldmode->limit > mode.limit)
399			mode.limit = oldmode->limit;
400			if (strcmp(mode.key, oldmode->key) < 0)
401			strcpy(mode.key, oldmode->key);
402			}
403
404			set_final_mode(&mode, oldmode);
405			chptr->mode = mode;
406
407			/* Lost the TS, other side wins, so remove modes on this side */
408			if (!keep_our_modes)
409			{
410			remove_our_modes(chptr, source_p);
411	michael	873
412	michael	1203	if (chptr->topic[0])
413	michael	873	{
414	michael	1203	set_channel_topic(chptr, "", "", 0);
415	michael	896	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :",
416	michael	873	(IsHidden(source_p) \|\|
417			ConfigServerHide.hide_servers) ?
418			me.name : source_p->name, chptr->chname);
419			}
420
421	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
422	adx	30	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
423			me.name, chptr->chname, chptr->chname,
424			(unsigned long)oldts, (unsigned long)newts);
425			}
426
427			if (*modebuf != '\0')
428			{
429			servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
430			me.name : source_p->name;
431
432			/* This _SHOULD_ be to ALL_MEMBERS
433			* It contains only +imnpstlk, etc */
434	michael	896	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s %s",
435	adx	30	servername, chptr->chname, modebuf, parabuf);
436			}
437
438			if (!IsMember(source_p, chptr))
439			{
440	michael	894	add_user_to_channel(chptr, source_p, 0, 1);
441			sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
442	adx	30	source_p->name, source_p->username,
443			source_p->host, chptr->chname);
444			}
445
446	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
447	adx	30	":%s JOIN %lu %s +",
448			ID(source_p), (unsigned long)chptr->channelts, chptr->chname);
449	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
450	adx	30	":%s SJOIN %lu %s + :%s",
451			source_p->servptr->name, (unsigned long)chptr->channelts,
452			chptr->chname, source_p->name);
453			}
454
455			/* do_join_0()
456			*
457			* inputs - pointer to client doing join 0
458			* output - NONE
459			* side effects - Use has decided to join 0. This is legacy
460			* from the days when channels were numbers not names. sigh
461			* There is a bunch of evilness necessary here due to
462			* anti spambot code.
463			*/
464			static void
465			do_join_0(struct Client client_p, struct Client source_p)
466			{
467			struct Channel *chptr = NULL;
468	michael	488	dlink_node ptr = NULL, ptr_next = NULL;
469	adx	30
470	michael	1219	if (source_p->channel.head)
471			if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER))
472			check_spambot_warning(source_p, NULL);
473	adx	30
474			DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->channel.head)
475			{
476			chptr = ((struct Membership *)ptr->data)->chptr;
477
478	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
479	michael	488	":%s PART %s", ID(source_p), chptr->chname);
480	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
481	michael	488	":%s PART %s", source_p->name, chptr->chname);
482	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s PART %s",
483	michael	488	source_p->name, source_p->username,
484			source_p->host, chptr->chname);
485	adx	30
486	michael	488	remove_user_from_channel(ptr->data);
487	adx	30	}
488			}
489
490	michael	1175	/* set_final_mode
491	adx	30	*
492	michael	1175	* inputs - channel mode
493			* - old channel mode
494	adx	30	* output - NONE
495	michael	1175	* side effects - walk through all the channel modes turning off modes
496			* that were on in oldmode but aren't on in mode.
497			* Then walk through turning on modes that are on in mode
498			* but were not set in oldmode.
499	adx	30	*/
500			static void
501			set_final_mode(struct Mode mode, struct Mode oldmode)
502			{
503	michael	1175	const struct mode_letter *tab;
504	adx	30	char *pbuf = parabuf;
505			int what = 0;
506			int len;
507
508	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
509	adx	30	{
510	michael	1175	if ((tab->mode & mode->mode) &&
511			!(tab->mode & oldmode->mode))
512	adx	30	{
513			if (what != 1)
514			{
515			*mbuf++ = '+';
516			what = 1;
517			}
518	michael	1175	*mbuf++ = tab->letter;
519	adx	30	}
520			}
521
522	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
523	adx	30	{
524	michael	1175	if ((tab->mode & oldmode->mode) &&
525			!(tab->mode & mode->mode))
526	adx	30	{
527			if (what != -1)
528			{
529			*mbuf++ = '-';
530			what = -1;
531			}
532	michael	1175	*mbuf++ = tab->letter;
533	adx	30	}
534			}
535
536			if (oldmode->limit != 0 && mode->limit == 0)
537			{
538			if (what != -1)
539			{
540			*mbuf++ = '-';
541			what = -1;
542			}
543			*mbuf++ = 'l';
544			}
545
546			if (oldmode->key[0] && !mode->key[0])
547			{
548			if (what != -1)
549			{
550			*mbuf++ = '-';
551			what = -1;
552			}
553			*mbuf++ = 'k';
554			len = ircsprintf(pbuf, "%s ", oldmode->key);
555			pbuf += len;
556			}
557
558			if (mode->limit != 0 && oldmode->limit != mode->limit)
559			{
560			if (what != 1)
561			{
562			*mbuf++ = '+';
563			what = 1;
564			}
565			*mbuf++ = 'l';
566			len = ircsprintf(pbuf, "%d ", mode->limit);
567			pbuf += len;
568			}
569
570			if (mode->key[0] && strcmp(oldmode->key, mode->key))
571			{
572			if (what != 1)
573			{
574			*mbuf++ = '+';
575			what = 1;
576			}
577			*mbuf++ = 'k';
578			len = ircsprintf(pbuf, "%s ", mode->key);
579			pbuf += len;
580			}
581			*mbuf = '\0';
582			}
583
584			/* remove_our_modes()
585			*
586			* inputs - pointer to channel to remove modes from
587			* - client pointer
588			* output - NONE
589			* side effects - Go through the local members, remove all their
590			* chanop modes etc., this side lost the TS.
591			*/
592			static void
593			remove_our_modes(struct Channel chptr, struct Client source_p)
594			{
595			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
596			#ifdef HALFOPS
597			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
598			#endif
599			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
600			}
601
602			/* remove_a_mode()
603			*
604			* inputs -
605			* output - NONE
606			* side effects - remove ONE mode from a channel
607			*/
608			static void
609			remove_a_mode(struct Channel chptr, struct Client source_p,
610			int mask, char flag)
611			{
612			dlink_node *ptr;
613			struct Membership *ms;
614			char lmodebuf[MODEBUFLEN];
615			const char *lpara[MAXMODEPARAMS];
616			int count = 0;
617			int lcount;
618
619			mbuf = lmodebuf;
620			*mbuf++ = '-';
621
622			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
623			lpara[lcount] = "";
624			sendbuf[0] = '\0';
625
626			DLINK_FOREACH(ptr, chptr->members.head)
627			{
628			ms = ptr->data;
629
630			if ((ms->flags & mask) == 0)
631			continue;
632
633			ms->flags &= ~mask;
634
635			lpara[count++] = ms->client_p->name;
636
637			*mbuf++ = flag;
638
639			if (count >= MAXMODEPARAMS)
640			{
641			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
642			{
643			if (*lpara[lcount] == '\0')
644			break;
645
646			strlcat(sendbuf, " ", sizeof(sendbuf));
647			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
648			lpara[lcount] = "";
649			}
650
651			*mbuf = '\0';
652	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
653	adx	30	":%s MODE %s %s%s",
654			(IsHidden(source_p) \|\|
655			ConfigServerHide.hide_servers) ?
656			me.name : source_p->name,
657			chptr->chname, lmodebuf, sendbuf);
658			mbuf = lmodebuf;
659			*mbuf++ = '-';
660			count = 0;
661			sendbuf[0] = '\0';
662			}
663			}
664
665			if (count != 0)
666			{
667			*mbuf = '\0';
668			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
669			{
670			if (*lpara[lcount] == '\0')
671			break;
672
673			strlcat(sendbuf, " ", sizeof(sendbuf));
674			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
675			}
676	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
677	adx	30	":%s MODE %s %s%s",
678			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
679			me.name : source_p->name,
680			chptr->chname, lmodebuf, sendbuf);
681			}
682			}