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 "tools.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 "list.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, 0, MFLG_SLOW, 0,
  { m_unregistered, m_join, ms_join, m_ignore, m_join, m_ignore }
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&join_msgtab);
}

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

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

/* 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) &&
        !(IsOper(source_p) && 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) &&
        (!IsOper(source_p) || (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 && !IsOper(source_p) && (*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 && !IsOper(source_p) && (*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 (!IsOper(source_p))
      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 != NULL)
    {
      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)
    {
      set_channel_topic(chptr, NULL, NULL, 0);
      chptr->topic_time = 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 && MyConnect(source_p) && !IsOper(source_p))
    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       - pointer to mode to setup
 *              - pointer to old mode
 * output       - NONE
 * side effects -
 */
static const struct mode_letter
{
  unsigned int mode;
  unsigned char letter;
} flags[] = {
  { MODE_NOPRIVMSGS, 'n' },
  { MODE_TOPICLIMIT, 't' },
  { MODE_SECRET,     's' },
  { MODE_MODERATED,  'm' },
  { MODE_INVITEONLY, 'i' },
  { MODE_PRIVATE,    'p' },
  { 0, '\0' }
};

static void
set_final_mode(struct Mode *mode, struct Mode *oldmode)
{
  char *pbuf = parabuf;
  int what   = 0;
  int len;
  int i;

  for (i = 0; flags[i].letter; i++)
  {
    if ((flags[i].mode & mode->mode) &&
        !(flags[i].mode & oldmode->mode))
    {
      if (what != 1)
      {
        *mbuf++ = '+';
        what = 1;
      }
      *mbuf++ = flags[i].letter;
    }
  }

  for (i = 0; flags[i].letter; i++)
  {
    if ((flags[i].mode & oldmode->mode) &&
        !(flags[i].mode & mode->mode))
    {
      if (what != -1)
      {
        *mbuf++ = '-';
        what = -1;
      }
      *mbuf++ = flags[i].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:	896
Committed:	Sat Nov 3 08:54:09 2007 UTC (16 years, 5 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.2/modules/core/m_join.c*
File size:	18661 byte(s)
Log Message:	- Killed s_stats.c
#	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			#include "tools.h"
27			#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 "list.h"
36			#include "numeric.h"
37			#include "send.h"
38			#include "s_serv.h"
39			#include "s_conf.h"
40			#include "msg.h"
41			#include "parse.h"
42			#include "modules.h"
43
44
45	michael	894	static void m_join(struct Client , struct Client , int, char *[]);
46			static void ms_join(struct Client , struct Client , int, char *[]);
47			static void do_join_0(struct Client , struct Client );
48	adx	30
49			static void set_final_mode(struct Mode , struct Mode );
50			static void remove_our_modes(struct Channel , struct Client );
51			static void remove_a_mode(struct Channel , struct Client , int, char);
52
53			static char modebuf[MODEBUFLEN];
54			static char parabuf[MODEBUFLEN];
55			static char sendbuf[MODEBUFLEN];
56			static char *mbuf;
57
58			struct Message join_msgtab = {
59			"JOIN", 0, 0, 2, 0, MFLG_SLOW, 0,
60	michael	894	{ m_unregistered, m_join, ms_join, m_ignore, m_join, m_ignore }
61	adx	30	};
62
63			#ifndef STATIC_MODULES
64			void
65			_modinit(void)
66			{
67			mod_add_cmd(&join_msgtab);
68			}
69
70			void
71			_moddeinit(void)
72			{
73			mod_del_cmd(&join_msgtab);
74			}
75
76	knight	31	const char *_version = "$Revision$";
77	adx	30	#endif
78
79	michael	488	/* last0() stolen from ircu */
80			static char *
81			last0(struct Client client_p, struct Client source_p, char *chanlist)
82			{
83			char *p;
84			int join0 = 0;
85
86			for (p = chanlist; p; ++p) / find last "JOIN 0" */
87			{
88			if (p == '0' && ((p + 1) == ',' \|\| *(p + 1) == '\0'))
89			{
90			if ((*p + 1) == ',')
91			++p;
92
93			chanlist = p + 1;
94			join0 = 1;
95			}
96			else
97			{
98			while (p != ',' && p != '\0') /* skip past channel name */
99			++p;
100
101			if (p == '\0') / hit the end */
102			break;
103			}
104			}
105
106			if (join0)
107			do_join_0(client_p, source_p);
108
109			return chanlist;
110			}
111
112	adx	30	/* m_join()
113			* parv[0] = sender prefix
114			* parv[1] = channel
115			* parv[2] = channel password (key)
116			*/
117			static void
118			m_join(struct Client client_p, struct Client source_p,
119			int parc, char *parv[])
120			{
121	michael	488	char *p = NULL;
122			char *key_list = NULL;
123			char *chan_list = NULL;
124			char *chan = NULL;
125	adx	30	struct Channel *chptr = NULL;
126	michael	488	int i = 0;
127	adx	30	unsigned int flags = 0;
128
129	michael	632	if (EmptyString(parv[1]))
130	adx	30	{
131			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
132			me.name, source_p->name, "JOIN");
133			return;
134			}
135
136	michael	487	assert(client_p == source_p);
137	adx	30
138	michael	488	key_list = parv[2];
139			chan_list = last0(client_p, source_p, parv[1]);
140	michael	487
141	michael	488	for (chan = strtoken(&p, chan_list, ","); chan;
142			chan = strtoken(&p, NULL, ","))
143	adx	30	{
144	michael	488	char *key = NULL;
145	adx	30
146	michael	488	/* If we have any more keys, take the first for this channel. */
147			if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ',')))
148			*key_list++ = '\0';
149
150			/* Empty keys are the same as no keys. */
151			if (key && *key == '\0')
152			key = NULL;
153
154	michael	632	if (!check_channel_name(chan, 1))
155	michael	488	{
156			sendto_one(source_p, form_str(ERR_BADCHANNAME),
157			me.name, source_p->name, chan);
158	adx	30	continue;
159	michael	488	}
160	adx	30
161	michael	488	if (ConfigChannel.disable_local_channels && (*chan == '&'))
162			{
163			sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
164			me.name, source_p->name, chan);
165			continue;
166			}
167
168			if (!IsExemptResv(source_p) &&
169			!(IsOper(source_p) && ConfigFileEntry.oper_pass_resv) &&
170			(!hash_find_resv(chan) == ConfigChannel.restrict_channels))
171			{
172			sendto_one(source_p, form_str(ERR_BADCHANNAME),
173			me.name, source_p->name, chan);
174			sendto_realops_flags(UMODE_SPY, L_ALL,
175			"User %s (%s@%s) is attempting to join locally juped channel %s",
176			source_p->name, source_p->username, source_p->host, chan);
177			continue;
178			}
179
180			if ((dlink_list_length(&source_p->channel) >= ConfigChannel.max_chans_per_user) &&
181			(!IsOper(source_p) \|\| (dlink_list_length(&source_p->channel) >=
182			ConfigChannel.max_chans_per_user * 3)))
183			{
184	michael	494	sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
185			me.name, source_p->name, chan);
186			break;
187	michael	488	}
188
189			if ((chptr = hash_find_channel(chan)) != NULL)
190			{
191			if (IsMember(source_p, chptr))
192			continue;
193
194			if (splitmode && !IsOper(source_p) && (*chan != '&') &&
195			ConfigChannel.no_join_on_split)
196			{
197			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
198			me.name, source_p->name, chan);
199			continue;
200			}
201
202			/*
203	michael	894	* can_join checks for +i key, bans.
204			*/
205			if ((i = can_join(source_p, chptr, key)))
206			{
207			sendto_one(source_p, form_str(i), me.name,
208			source_p->name, chptr->chname);
209			continue;
210			}
211
212			/*
213	michael	488	* This should never be the case unless there is some sort of
214			* persistant channels.
215			*/
216			if (dlink_list_length(&chptr->members) == 0)
217			flags = CHFL_CHANOP;
218			else
219			flags = 0;
220			}
221			else
222			{
223			if (splitmode && !IsOper(source_p) && (*chan != '&') &&
224			(ConfigChannel.no_create_on_split \|\| ConfigChannel.no_join_on_split))
225			{
226			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
227			me.name, source_p->name, chan);
228			continue;
229			}
230
231			flags = CHFL_CHANOP;
232	michael	632	chptr = make_channel(chan);
233	michael	488	}
234
235	adx	30	if (!IsOper(source_p))
236			check_spambot_warning(source_p, chptr->chname);
237
238	michael	894	add_user_to_channel(chptr, source_p, flags, 1);
239	adx	30
240			/*
241	michael	488	* Set timestamp if appropriate, and propagate
242			*/
243	adx	30	if (flags & CHFL_CHANOP)
244			{
245			chptr->channelts = CurrentTime;
246			chptr->mode.mode \|= MODE_TOPICLIMIT;
247			chptr->mode.mode \|= MODE_NOPRIVMSGS;
248
249	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
250	adx	30	":%s SJOIN %lu %s +nt :@%s",
251			me.id, (unsigned long)chptr->channelts,
252			chptr->chname, source_p->id);
253	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
254	adx	30	":%s SJOIN %lu %s +nt :@%s",
255			me.name, (unsigned long)chptr->channelts,
256	michael	632	chptr->chname, source_p->name);
257	adx	30	/*
258			* notify all other users on the new channel
259			*/
260	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
261	adx	30	source_p->name, source_p->username,
262			source_p->host, chptr->chname);
263	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s +nt",
264	adx	30	me.name, chptr->chname);
265			}
266			else
267			{
268	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
269	adx	30	":%s JOIN %lu %s +",
270			source_p->id, (unsigned long)chptr->channelts,
271			chptr->chname);
272	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
273	adx	30	":%s SJOIN %lu %s + :%s",
274			me.name, (unsigned long)chptr->channelts,
275			chptr->chname, source_p->name);
276
277	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
278	adx	30	source_p->name, source_p->username,
279			source_p->host, chptr->chname);
280			}
281
282			del_invite(chptr, source_p);
283
284			if (chptr->topic != NULL)
285			{
286			sendto_one(source_p, form_str(RPL_TOPIC), me.name,
287			source_p->name, chptr->chname, chptr->topic);
288
289			sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
290			me.name, source_p->name, chptr->chname,
291			chptr->topic_info, chptr->topic_time);
292			}
293
294			channel_member_names(source_p, chptr, 1);
295
296	michael	487	source_p->localClient->last_join_time = CurrentTime;
297	adx	30	}
298			}
299
300			/* ms_join()
301			*
302			* inputs - parv[0] = uid
303			* parv[1] = ts
304			* parv[2] = channel name
305	db	853	* parv[3] = modes (Deprecated)
306	adx	30	* output - none
307			* side effects - handles remote JOIN's sent by servers. In TSora
308			* remote clients are joined using SJOIN, hence a
309			* JOIN sent by a server on behalf of a client is an error.
310			* here, the initial code is in to take an extra parameter
311			* and use it for the TimeStamp on a new channel.
312			*/
313			static void
314			ms_join(struct Client client_p, struct Client source_p,
315			int parc, char *parv[])
316			{
317	michael	632	time_t newts = 0;
318			time_t oldts = 0;
319			int keep_our_modes = 1;
320			int keep_new_modes = 1;
321			int isnew = 0;
322			const char *servername = NULL;
323			struct Channel *chptr = NULL;
324			struct Mode mode, *oldmode;
325	adx	30
326	michael	632	if (parc == 2 && !irccmp(parv[1], "0"))
327	adx	30	{
328			do_join_0(client_p, source_p);
329			return;
330			}
331
332	michael	632	if (parc < 4 \|\| *parv[2] == '&')
333	adx	30	return;
334
335	michael	632	if (!check_channel_name(parv[2], 0))
336			{
337			sendto_realops_flags(UMODE_DEBUG, L_ALL,
338			"*** Too long or invalid channel name from %s: %s",
339			client_p->name, parv[2]);
340	adx	30	return;
341	michael	632	}
342	adx	30
343			mbuf = modebuf;
344			mode.mode = mode.limit = 0;
345			mode.key[0] = '\0';
346
347	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
348			{
349			isnew = 1;
350			chptr = make_channel(parv[2]);
351			}
352
353			newts = atol(parv[1]);
354	adx	30	oldts = chptr->channelts;
355			oldmode = &chptr->mode;
356
357			if (ConfigFileEntry.ignore_bogus_ts)
358			{
359			if (newts < 800000000)
360			{
361			sendto_realops_flags(UMODE_DEBUG, L_ALL,
362			"*** Bogus TS %lu on %s ignored from %s",
363			(unsigned long)newts, chptr->chname,
364			client_p->name);
365
366			newts = (oldts == 0) ? 0 : 800000000;
367			}
368			}
369			else
370			{
371			if (!newts && !isnew && oldts)
372			{
373	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
374	michael	873	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
375			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
376	adx	30	sendto_realops_flags(UMODE_ALL, L_ALL,
377			"Server %s changing TS on %s from %lu to 0",
378			source_p->name, chptr->chname, (unsigned long)oldts);
379			}
380			}
381
382			if (isnew)
383			chptr->channelts = newts;
384			else if (newts == 0 \|\| oldts == 0)
385			chptr->channelts = 0;
386			else if (newts == oldts)
387			;
388			else if (newts < oldts)
389			{
390	michael	894	keep_our_modes = 0;
391	adx	30	chptr->channelts = newts;
392			}
393			else
394	michael	894	keep_new_modes = 0;
395	adx	30
396			if (!keep_new_modes)
397			mode = *oldmode;
398			else if (keep_our_modes)
399			{
400			mode.mode \|= oldmode->mode;
401			if (oldmode->limit > mode.limit)
402			mode.limit = oldmode->limit;
403			if (strcmp(mode.key, oldmode->key) < 0)
404			strcpy(mode.key, oldmode->key);
405			}
406
407			set_final_mode(&mode, oldmode);
408			chptr->mode = mode;
409
410			/* Lost the TS, other side wins, so remove modes on this side */
411			if (!keep_our_modes)
412			{
413			remove_our_modes(chptr, source_p);
414	michael	873
415			if (chptr->topic)
416			{
417			set_channel_topic(chptr, NULL, NULL, 0);
418			chptr->topic_time = 0;
419	michael	896	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :",
420	michael	873	(IsHidden(source_p) \|\|
421			ConfigServerHide.hide_servers) ?
422			me.name : source_p->name, chptr->chname);
423			}
424
425	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
426	adx	30	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
427			me.name, chptr->chname, chptr->chname,
428			(unsigned long)oldts, (unsigned long)newts);
429			}
430
431			if (*modebuf != '\0')
432			{
433			servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
434			me.name : source_p->name;
435
436			/* This _SHOULD_ be to ALL_MEMBERS
437			* It contains only +imnpstlk, etc */
438	michael	896	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s %s",
439	adx	30	servername, chptr->chname, modebuf, parabuf);
440			}
441
442			if (!IsMember(source_p, chptr))
443			{
444	michael	894	add_user_to_channel(chptr, source_p, 0, 1);
445			sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
446	adx	30	source_p->name, source_p->username,
447			source_p->host, chptr->chname);
448			}
449
450	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
451	adx	30	":%s JOIN %lu %s +",
452			ID(source_p), (unsigned long)chptr->channelts, chptr->chname);
453	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
454	adx	30	":%s SJOIN %lu %s + :%s",
455			source_p->servptr->name, (unsigned long)chptr->channelts,
456			chptr->chname, source_p->name);
457			}
458
459			/* do_join_0()
460			*
461			* inputs - pointer to client doing join 0
462			* output - NONE
463			* side effects - Use has decided to join 0. This is legacy
464			* from the days when channels were numbers not names. sigh
465			* There is a bunch of evilness necessary here due to
466			* anti spambot code.
467			*/
468			static void
469			do_join_0(struct Client client_p, struct Client source_p)
470			{
471			struct Channel *chptr = NULL;
472	michael	488	dlink_node ptr = NULL, ptr_next = NULL;
473	adx	30
474	michael	488	if (source_p->channel.head && MyConnect(source_p) && !IsOper(source_p))
475	adx	30	check_spambot_warning(source_p, NULL);
476
477			DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->channel.head)
478			{
479			chptr = ((struct Membership *)ptr->data)->chptr;
480
481	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
482	michael	488	":%s PART %s", ID(source_p), chptr->chname);
483	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
484	michael	488	":%s PART %s", source_p->name, chptr->chname);
485	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s PART %s",
486	michael	488	source_p->name, source_p->username,
487			source_p->host, chptr->chname);
488	adx	30
489	michael	488	remove_user_from_channel(ptr->data);
490	adx	30	}
491			}
492
493			/* set_final_mode()
494			*
495			* inputs - pointer to mode to setup
496			* - pointer to old mode
497			* output - NONE
498			* side effects -
499			*/
500			static const struct mode_letter
501			{
502			unsigned int mode;
503			unsigned char letter;
504			} flags[] = {
505			{ MODE_NOPRIVMSGS, 'n' },
506			{ MODE_TOPICLIMIT, 't' },
507			{ MODE_SECRET, 's' },
508			{ MODE_MODERATED, 'm' },
509			{ MODE_INVITEONLY, 'i' },
510			{ MODE_PRIVATE, 'p' },
511			{ 0, '\0' }
512			};
513
514			static void
515			set_final_mode(struct Mode mode, struct Mode oldmode)
516			{
517			char *pbuf = parabuf;
518			int what = 0;
519			int len;
520			int i;
521
522			for (i = 0; flags[i].letter; i++)
523			{
524			if ((flags[i].mode & mode->mode) &&
525			!(flags[i].mode & oldmode->mode))
526			{
527			if (what != 1)
528			{
529			*mbuf++ = '+';
530			what = 1;
531			}
532			*mbuf++ = flags[i].letter;
533			}
534			}
535
536			for (i = 0; flags[i].letter; i++)
537			{
538			if ((flags[i].mode & oldmode->mode) &&
539			!(flags[i].mode & mode->mode))
540			{
541			if (what != -1)
542			{
543			*mbuf++ = '-';
544			what = -1;
545			}
546			*mbuf++ = flags[i].letter;
547			}
548			}
549
550			if (oldmode->limit != 0 && mode->limit == 0)
551			{
552			if (what != -1)
553			{
554			*mbuf++ = '-';
555			what = -1;
556			}
557			*mbuf++ = 'l';
558			}
559
560			if (oldmode->key[0] && !mode->key[0])
561			{
562			if (what != -1)
563			{
564			*mbuf++ = '-';
565			what = -1;
566			}
567			*mbuf++ = 'k';
568			len = ircsprintf(pbuf, "%s ", oldmode->key);
569			pbuf += len;
570			}
571
572			if (mode->limit != 0 && oldmode->limit != mode->limit)
573			{
574			if (what != 1)
575			{
576			*mbuf++ = '+';
577			what = 1;
578			}
579			*mbuf++ = 'l';
580			len = ircsprintf(pbuf, "%d ", mode->limit);
581			pbuf += len;
582			}
583
584			if (mode->key[0] && strcmp(oldmode->key, mode->key))
585			{
586			if (what != 1)
587			{
588			*mbuf++ = '+';
589			what = 1;
590			}
591			*mbuf++ = 'k';
592			len = ircsprintf(pbuf, "%s ", mode->key);
593			pbuf += len;
594			}
595			*mbuf = '\0';
596			}
597
598			/* remove_our_modes()
599			*
600			* inputs - pointer to channel to remove modes from
601			* - client pointer
602			* output - NONE
603			* side effects - Go through the local members, remove all their
604			* chanop modes etc., this side lost the TS.
605			*/
606			static void
607			remove_our_modes(struct Channel chptr, struct Client source_p)
608			{
609			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
610			#ifdef HALFOPS
611			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
612			#endif
613			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
614			}
615
616			/* remove_a_mode()
617			*
618			* inputs -
619			* output - NONE
620			* side effects - remove ONE mode from a channel
621			*/
622			static void
623			remove_a_mode(struct Channel chptr, struct Client source_p,
624			int mask, char flag)
625			{
626			dlink_node *ptr;
627			struct Membership *ms;
628			char lmodebuf[MODEBUFLEN];
629			const char *lpara[MAXMODEPARAMS];
630			int count = 0;
631			int lcount;
632
633			mbuf = lmodebuf;
634			*mbuf++ = '-';
635
636			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
637			lpara[lcount] = "";
638			sendbuf[0] = '\0';
639
640			DLINK_FOREACH(ptr, chptr->members.head)
641			{
642			ms = ptr->data;
643
644			if ((ms->flags & mask) == 0)
645			continue;
646
647			ms->flags &= ~mask;
648
649			lpara[count++] = ms->client_p->name;
650
651			*mbuf++ = flag;
652
653			if (count >= MAXMODEPARAMS)
654			{
655			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
656			{
657			if (*lpara[lcount] == '\0')
658			break;
659
660			strlcat(sendbuf, " ", sizeof(sendbuf));
661			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
662			lpara[lcount] = "";
663			}
664
665			*mbuf = '\0';
666	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
667	adx	30	":%s MODE %s %s%s",
668			(IsHidden(source_p) \|\|
669			ConfigServerHide.hide_servers) ?
670			me.name : source_p->name,
671			chptr->chname, lmodebuf, sendbuf);
672			mbuf = lmodebuf;
673			*mbuf++ = '-';
674			count = 0;
675			sendbuf[0] = '\0';
676			}
677			}
678
679			if (count != 0)
680			{
681			*mbuf = '\0';
682			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
683			{
684			if (*lpara[lcount] == '\0')
685			break;
686
687			strlcat(sendbuf, " ", sizeof(sendbuf));
688			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
689			}
690	michael	894	sendto_channel_local(ALL_MEMBERS, 0, chptr,
691	adx	30	":%s MODE %s %s%s",
692			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
693			me.name : source_p->name,
694			chptr->chname, lmodebuf, sendbuf);
695			}
696			}
697