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 "common.h"   /* bleah */
#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 *client_p, struct Client *source_p);

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;
      }

      /*
       * 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);

    /*
     * 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;
    }

    add_user_to_channel(chptr, source_p, flags, YES);

    /*
     *  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, source_p, chptr, CAP_TS6, NOCAPS, LL_ICLIENT,
                    ":%s SJOIN %lu %s +nt :@%s",
                    me.id, (unsigned long)chptr->channelts,
                    chptr->chname, source_p->id);
      sendto_server(client_p, source_p, chptr, NOCAPS, CAP_TS6, LL_ICLIENT,
                    ":%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, NO, chptr, ":%s!%s@%s JOIN :%s",
                           source_p->name, source_p->username,
                           source_p->host, chptr->chname);
      sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s +nt",
                           me.name, chptr->chname);
    }
    else
    {
      sendto_server(client_p, source_p, chptr, CAP_TS6, NOCAPS, LL_ICLIENT,
                    ":%s JOIN %lu %s +",
                    source_p->id, (unsigned long)chptr->channelts,
                    chptr->chname);
      sendto_server(client_p, source_p, chptr, NOCAPS, CAP_TS6, LL_ICLIENT,
                    ":%s SJOIN %lu %s + :%s",
                    me.name, (unsigned long)chptr->channelts,
                    chptr->chname, source_p->name);

      sendto_channel_local(ALL_MEMBERS, NO, 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
 * 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 args = 0;
  int keep_our_modes = 1;
  int keep_new_modes = 1;
  int isnew = 0;
  const char *s = NULL;
  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';

  for (s = parv[3]; *s; ++s)
  {
    switch (*s)
    {
      case 't':
        mode.mode |= MODE_TOPICLIMIT;
        break;
      case 'n':
        mode.mode |= MODE_NOPRIVMSGS;
        break;
      case 's':
        mode.mode |= MODE_SECRET;
        break;
      case 'm':
        mode.mode |= MODE_MODERATED;
        break;
      case 'i':
        mode.mode |= MODE_INVITEONLY;
        break;
      case 'p':
        mode.mode |= MODE_PRIVATE;
        break;
      case 'k':
        if (parc < 5 + args)
          return;

        strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
        args++;
        break;
      case 'l':
        if (parc < 5 + args)
          return;

        mode.limit = atoi(parv[4 + args]);
        args++;
        break;
    }
  }


  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, NO, 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 = NO;
    chptr->channelts = newts;
  }
  else
    keep_new_modes = NO;

  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);
    sendto_channel_local(ALL_MEMBERS, NO, 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, NO, chptr, ":%s MODE %s %s %s",
                         servername, chptr->chname, modebuf, parabuf);
  }

  if (!IsMember(source_p, chptr))
  {
    add_user_to_channel(chptr, source_p, 0, YES);
    sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
                         source_p->name, source_p->username,
                         source_p->host, chptr->chname);
  }

  sendto_server(client_p, NULL, chptr, CAP_TS6, NOCAPS, NOFLAGS,
                ":%s JOIN %lu %s +",
                ID(source_p), (unsigned long)chptr->channelts, chptr->chname);
  sendto_server(client_p, NULL, chptr, NOCAPS, CAP_TS6, NOFLAGS,
                ":%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, NULL, chptr, CAP_TS6, NOCAPS, NOFLAGS,
                  ":%s PART %s", ID(source_p), chptr->chname);
    sendto_server(client_p, NULL, chptr, NOCAPS, CAP_TS6, NOFLAGS,
                  ":%s PART %s", source_p->name, chptr->chname);
    sendto_channel_local(ALL_MEMBERS, NO, 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, NO, 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, NO, chptr,
                         ":%s MODE %s %s%s",
                         (IsHidden(source_p) || ConfigServerHide.hide_servers) ?
                         me.name : source_p->name,
                         chptr->chname, lmodebuf, sendbuf);
  }
}

Revision:	632
Committed:	Thu Jun 1 10:53:00 2006 UTC (17 years, 10 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.2/modules/core/m_join.c*
File size:	19292 byte(s)
Log Message:	- Added channel::disable_fake_channels which disallows creation of channels that have ascii 2, 3, 31 and 160 in their names. - Minor improvements and cleanups to channel name validation routines backported from 7.3
#	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 "common.h" /* bleah */
32			#include "hash.h"
33			#include "irc_string.h"
34			#include "sprintf_irc.h"
35			#include "ircd.h"
36			#include "list.h"
37			#include "numeric.h"
38			#include "send.h"
39			#include "s_serv.h"
40			#include "s_conf.h"
41			#include "msg.h"
42			#include "parse.h"
43			#include "modules.h"
44
45
46			static void m_join(struct Client , struct Client , int, char **);
47			static void ms_join(struct Client , struct Client , int, char **);
48			static void do_join_0(struct Client client_p, struct Client source_p);
49
50			static void set_final_mode(struct Mode , struct Mode );
51			static void remove_our_modes(struct Channel , struct Client );
52			static void remove_a_mode(struct Channel , struct Client , int, char);
53
54			static char modebuf[MODEBUFLEN];
55			static char parabuf[MODEBUFLEN];
56			static char sendbuf[MODEBUFLEN];
57			static char *mbuf;
58
59			struct Message join_msgtab = {
60			"JOIN", 0, 0, 2, 0, MFLG_SLOW, 0,
61			{m_unregistered, m_join, ms_join, m_ignore, m_join, m_ignore}
62			};
63
64			#ifndef STATIC_MODULES
65			void
66			_modinit(void)
67			{
68			mod_add_cmd(&join_msgtab);
69			}
70
71			void
72			_moddeinit(void)
73			{
74			mod_del_cmd(&join_msgtab);
75			}
76
77	knight	31	const char *_version = "$Revision$";
78	adx	30	#endif
79
80	michael	488	/* last0() stolen from ircu */
81			static char *
82			last0(struct Client client_p, struct Client source_p, char *chanlist)
83			{
84			char *p;
85			int join0 = 0;
86
87			for (p = chanlist; p; ++p) / find last "JOIN 0" */
88			{
89			if (p == '0' && ((p + 1) == ',' \|\| *(p + 1) == '\0'))
90			{
91			if ((*p + 1) == ',')
92			++p;
93
94			chanlist = p + 1;
95			join0 = 1;
96			}
97			else
98			{
99			while (p != ',' && p != '\0') /* skip past channel name */
100			++p;
101
102			if (p == '\0') / hit the end */
103			break;
104			}
105			}
106
107			if (join0)
108			do_join_0(client_p, source_p);
109
110			return chanlist;
111			}
112
113	adx	30	/* m_join()
114			* parv[0] = sender prefix
115			* parv[1] = channel
116			* parv[2] = channel password (key)
117			*/
118			static void
119			m_join(struct Client client_p, struct Client source_p,
120			int parc, char *parv[])
121			{
122	michael	488	char *p = NULL;
123			char *key_list = NULL;
124			char *chan_list = NULL;
125			char *chan = NULL;
126	adx	30	struct Channel *chptr = NULL;
127	michael	488	int i = 0;
128	adx	30	unsigned int flags = 0;
129
130	michael	632	if (EmptyString(parv[1]))
131	adx	30	{
132			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
133			me.name, source_p->name, "JOIN");
134			return;
135			}
136
137	michael	487	assert(client_p == source_p);
138	adx	30
139	michael	488	key_list = parv[2];
140			chan_list = last0(client_p, source_p, parv[1]);
141	michael	487
142	michael	488	for (chan = strtoken(&p, chan_list, ","); chan;
143			chan = strtoken(&p, NULL, ","))
144	adx	30	{
145	michael	488	char *key = NULL;
146	adx	30
147	michael	488	/* If we have any more keys, take the first for this channel. */
148			if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ',')))
149			*key_list++ = '\0';
150
151			/* Empty keys are the same as no keys. */
152			if (key && *key == '\0')
153			key = NULL;
154
155	michael	632	if (!check_channel_name(chan, 1))
156	michael	488	{
157			sendto_one(source_p, form_str(ERR_BADCHANNAME),
158			me.name, source_p->name, chan);
159	adx	30	continue;
160	michael	488	}
161	adx	30
162	michael	488	if (ConfigChannel.disable_local_channels && (*chan == '&'))
163			{
164			sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
165			me.name, source_p->name, chan);
166			continue;
167			}
168
169			if (!IsExemptResv(source_p) &&
170			!(IsOper(source_p) && ConfigFileEntry.oper_pass_resv) &&
171			(!hash_find_resv(chan) == ConfigChannel.restrict_channels))
172			{
173			sendto_one(source_p, form_str(ERR_BADCHANNAME),
174			me.name, source_p->name, chan);
175			sendto_realops_flags(UMODE_SPY, L_ALL,
176			"User %s (%s@%s) is attempting to join locally juped channel %s",
177			source_p->name, source_p->username, source_p->host, chan);
178			continue;
179			}
180
181			if ((dlink_list_length(&source_p->channel) >= ConfigChannel.max_chans_per_user) &&
182			(!IsOper(source_p) \|\| (dlink_list_length(&source_p->channel) >=
183			ConfigChannel.max_chans_per_user * 3)))
184			{
185	michael	494	sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
186			me.name, source_p->name, chan);
187			break;
188	michael	488	}
189
190			if ((chptr = hash_find_channel(chan)) != NULL)
191			{
192			if (IsMember(source_p, chptr))
193			continue;
194
195			if (splitmode && !IsOper(source_p) && (*chan != '&') &&
196			ConfigChannel.no_join_on_split)
197			{
198			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
199			me.name, source_p->name, chan);
200			continue;
201			}
202
203			/*
204			* This should never be the case unless there is some sort of
205			* persistant channels.
206			*/
207			if (dlink_list_length(&chptr->members) == 0)
208			flags = CHFL_CHANOP;
209			else
210			flags = 0;
211			}
212			else
213			{
214			if (splitmode && !IsOper(source_p) && (*chan != '&') &&
215			(ConfigChannel.no_create_on_split \|\| ConfigChannel.no_join_on_split))
216			{
217			sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
218			me.name, source_p->name, chan);
219			continue;
220			}
221
222			flags = CHFL_CHANOP;
223	michael	632	chptr = make_channel(chan);
224	michael	488	}
225
226	adx	30	if (!IsOper(source_p))
227			check_spambot_warning(source_p, chptr->chname);
228
229			/*
230			* can_join checks for +i key, bans.
231			*/
232			if ((i = can_join(source_p, chptr, key)))
233			{
234	michael	488	sendto_one(source_p, form_str(i), me.name,
235			source_p->name, chptr->chname);
236	adx	30	continue;
237			}
238
239			add_user_to_channel(chptr, source_p, flags, YES);
240
241			/*
242	michael	488	* Set timestamp if appropriate, and propagate
243			*/
244	adx	30	if (flags & CHFL_CHANOP)
245			{
246			chptr->channelts = CurrentTime;
247			chptr->mode.mode \|= MODE_TOPICLIMIT;
248			chptr->mode.mode \|= MODE_NOPRIVMSGS;
249
250			sendto_server(client_p, source_p, chptr, CAP_TS6, NOCAPS, LL_ICLIENT,
251			":%s SJOIN %lu %s +nt :@%s",
252			me.id, (unsigned long)chptr->channelts,
253			chptr->chname, source_p->id);
254			sendto_server(client_p, source_p, chptr, NOCAPS, CAP_TS6, LL_ICLIENT,
255			":%s SJOIN %lu %s +nt :@%s",
256			me.name, (unsigned long)chptr->channelts,
257	michael	632	chptr->chname, source_p->name);
258	adx	30	/*
259			* notify all other users on the new channel
260			*/
261			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
262			source_p->name, source_p->username,
263			source_p->host, chptr->chname);
264	michael	488	sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s +nt",
265	adx	30	me.name, chptr->chname);
266			}
267			else
268			{
269			sendto_server(client_p, source_p, chptr, CAP_TS6, NOCAPS, LL_ICLIENT,
270			":%s JOIN %lu %s +",
271			source_p->id, (unsigned long)chptr->channelts,
272			chptr->chname);
273			sendto_server(client_p, source_p, chptr, NOCAPS, CAP_TS6, LL_ICLIENT,
274			":%s SJOIN %lu %s + :%s",
275			me.name, (unsigned long)chptr->channelts,
276			chptr->chname, source_p->name);
277
278			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
279			source_p->name, source_p->username,
280			source_p->host, chptr->chname);
281			}
282
283			del_invite(chptr, source_p);
284
285			if (chptr->topic != NULL)
286			{
287			sendto_one(source_p, form_str(RPL_TOPIC), me.name,
288			source_p->name, chptr->chname, chptr->topic);
289
290			sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
291			me.name, source_p->name, chptr->chname,
292			chptr->topic_info, chptr->topic_time);
293			}
294
295			channel_member_names(source_p, chptr, 1);
296
297	michael	487	source_p->localClient->last_join_time = CurrentTime;
298	adx	30	}
299			}
300
301			/* ms_join()
302			*
303			* inputs - parv[0] = uid
304			* parv[1] = ts
305			* parv[2] = channel name
306			* parv[3] = modes
307			* output - none
308			* side effects - handles remote JOIN's sent by servers. In TSora
309			* remote clients are joined using SJOIN, hence a
310			* JOIN sent by a server on behalf of a client is an error.
311			* here, the initial code is in to take an extra parameter
312			* and use it for the TimeStamp on a new channel.
313			*/
314			static void
315			ms_join(struct Client client_p, struct Client source_p,
316			int parc, char *parv[])
317			{
318	michael	632	time_t newts = 0;
319			time_t oldts = 0;
320			int args = 0;
321			int keep_our_modes = 1;
322			int keep_new_modes = 1;
323			int isnew = 0;
324			const char *s = NULL;
325			const char *servername = NULL;
326			struct Channel *chptr = NULL;
327			struct Mode mode, *oldmode;
328	adx	30
329	michael	632	if (parc == 2 && !irccmp(parv[1], "0"))
330	adx	30	{
331			do_join_0(client_p, source_p);
332			return;
333			}
334
335	michael	632	if (parc < 4 \|\| *parv[2] == '&')
336	adx	30	return;
337
338	michael	632	if (!check_channel_name(parv[2], 0))
339			{
340			sendto_realops_flags(UMODE_DEBUG, L_ALL,
341			"*** Too long or invalid channel name from %s: %s",
342			client_p->name, parv[2]);
343	adx	30	return;
344	michael	632	}
345	adx	30
346			mbuf = modebuf;
347			mode.mode = mode.limit = 0;
348			mode.key[0] = '\0';
349
350	michael	632	for (s = parv[3]; *s; ++s)
351	adx	30	{
352	michael	632	switch (*s)
353	adx	30	{
354			case 't':
355			mode.mode \|= MODE_TOPICLIMIT;
356			break;
357			case 'n':
358			mode.mode \|= MODE_NOPRIVMSGS;
359			break;
360			case 's':
361			mode.mode \|= MODE_SECRET;
362			break;
363			case 'm':
364			mode.mode \|= MODE_MODERATED;
365			break;
366			case 'i':
367			mode.mode \|= MODE_INVITEONLY;
368			break;
369			case 'p':
370			mode.mode \|= MODE_PRIVATE;
371			break;
372			case 'k':
373	michael	632	if (parc < 5 + args)
374	adx	30	return;
375
376			strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
377			args++;
378			break;
379			case 'l':
380	michael	632	if (parc < 5 + args)
381	adx	30	return;
382
383			mode.limit = atoi(parv[4 + args]);
384			args++;
385			break;
386			}
387			}
388
389
390	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
391			{
392			isnew = 1;
393			chptr = make_channel(parv[2]);
394			}
395
396			newts = atol(parv[1]);
397	adx	30	oldts = chptr->channelts;
398			oldmode = &chptr->mode;
399
400			if (ConfigFileEntry.ignore_bogus_ts)
401			{
402			if (newts < 800000000)
403			{
404			sendto_realops_flags(UMODE_DEBUG, L_ALL,
405			"*** Bogus TS %lu on %s ignored from %s",
406			(unsigned long)newts, chptr->chname,
407			client_p->name);
408
409			newts = (oldts == 0) ? 0 : 800000000;
410			}
411			}
412			else
413			{
414			if (!newts && !isnew && oldts)
415			{
416			sendto_channel_local(ALL_MEMBERS, NO, chptr,
417			":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
418			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
419			sendto_realops_flags(UMODE_ALL, L_ALL,
420			"Server %s changing TS on %s from %lu to 0",
421			source_p->name, chptr->chname, (unsigned long)oldts);
422			}
423			}
424
425			if (isnew)
426			chptr->channelts = newts;
427			else if (newts == 0 \|\| oldts == 0)
428			chptr->channelts = 0;
429			else if (newts == oldts)
430			;
431			else if (newts < oldts)
432			{
433			keep_our_modes = NO;
434			chptr->channelts = newts;
435			}
436			else
437			keep_new_modes = NO;
438
439			if (!keep_new_modes)
440			mode = *oldmode;
441			else if (keep_our_modes)
442			{
443			mode.mode \|= oldmode->mode;
444			if (oldmode->limit > mode.limit)
445			mode.limit = oldmode->limit;
446			if (strcmp(mode.key, oldmode->key) < 0)
447			strcpy(mode.key, oldmode->key);
448			}
449
450			set_final_mode(&mode, oldmode);
451			chptr->mode = mode;
452
453			/* Lost the TS, other side wins, so remove modes on this side */
454			if (!keep_our_modes)
455			{
456			remove_our_modes(chptr, source_p);
457			sendto_channel_local(ALL_MEMBERS, NO, chptr,
458			":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
459			me.name, chptr->chname, chptr->chname,
460			(unsigned long)oldts, (unsigned long)newts);
461			}
462
463			if (*modebuf != '\0')
464			{
465			servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
466			me.name : source_p->name;
467
468			/* This _SHOULD_ be to ALL_MEMBERS
469			* It contains only +imnpstlk, etc */
470			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s",
471			servername, chptr->chname, modebuf, parabuf);
472			}
473
474			if (!IsMember(source_p, chptr))
475			{
476			add_user_to_channel(chptr, source_p, 0, YES);
477			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
478			source_p->name, source_p->username,
479			source_p->host, chptr->chname);
480			}
481
482			sendto_server(client_p, NULL, chptr, CAP_TS6, NOCAPS, NOFLAGS,
483			":%s JOIN %lu %s +",
484			ID(source_p), (unsigned long)chptr->channelts, chptr->chname);
485			sendto_server(client_p, NULL, chptr, NOCAPS, CAP_TS6, NOFLAGS,
486			":%s SJOIN %lu %s + :%s",
487			source_p->servptr->name, (unsigned long)chptr->channelts,
488			chptr->chname, source_p->name);
489			}
490
491			/* do_join_0()
492			*
493			* inputs - pointer to client doing join 0
494			* output - NONE
495			* side effects - Use has decided to join 0. This is legacy
496			* from the days when channels were numbers not names. sigh
497			* There is a bunch of evilness necessary here due to
498			* anti spambot code.
499			*/
500			static void
501			do_join_0(struct Client client_p, struct Client source_p)
502			{
503			struct Channel *chptr = NULL;
504	michael	488	dlink_node ptr = NULL, ptr_next = NULL;
505	adx	30
506	michael	488	if (source_p->channel.head && MyConnect(source_p) && !IsOper(source_p))
507	adx	30	check_spambot_warning(source_p, NULL);
508
509			DLINK_FOREACH_SAFE(ptr, ptr_next, source_p->channel.head)
510			{
511			chptr = ((struct Membership *)ptr->data)->chptr;
512
513	michael	488	sendto_server(client_p, NULL, chptr, CAP_TS6, NOCAPS, NOFLAGS,
514			":%s PART %s", ID(source_p), chptr->chname);
515			sendto_server(client_p, NULL, chptr, NOCAPS, CAP_TS6, NOFLAGS,
516			":%s PART %s", source_p->name, chptr->chname);
517			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s PART %s",
518			source_p->name, source_p->username,
519			source_p->host, chptr->chname);
520	adx	30
521	michael	488	remove_user_from_channel(ptr->data);
522	adx	30	}
523			}
524
525			/* set_final_mode()
526			*
527			* inputs - pointer to mode to setup
528			* - pointer to old mode
529			* output - NONE
530			* side effects -
531			*/
532			static const struct mode_letter
533			{
534			unsigned int mode;
535			unsigned char letter;
536			} flags[] = {
537			{ MODE_NOPRIVMSGS, 'n' },
538			{ MODE_TOPICLIMIT, 't' },
539			{ MODE_SECRET, 's' },
540			{ MODE_MODERATED, 'm' },
541			{ MODE_INVITEONLY, 'i' },
542			{ MODE_PRIVATE, 'p' },
543			{ 0, '\0' }
544			};
545
546			static void
547			set_final_mode(struct Mode mode, struct Mode oldmode)
548			{
549			char *pbuf = parabuf;
550			int what = 0;
551			int len;
552			int i;
553
554			for (i = 0; flags[i].letter; i++)
555			{
556			if ((flags[i].mode & mode->mode) &&
557			!(flags[i].mode & oldmode->mode))
558			{
559			if (what != 1)
560			{
561			*mbuf++ = '+';
562			what = 1;
563			}
564			*mbuf++ = flags[i].letter;
565			}
566			}
567
568			for (i = 0; flags[i].letter; i++)
569			{
570			if ((flags[i].mode & oldmode->mode) &&
571			!(flags[i].mode & mode->mode))
572			{
573			if (what != -1)
574			{
575			*mbuf++ = '-';
576			what = -1;
577			}
578			*mbuf++ = flags[i].letter;
579			}
580			}
581
582			if (oldmode->limit != 0 && mode->limit == 0)
583			{
584			if (what != -1)
585			{
586			*mbuf++ = '-';
587			what = -1;
588			}
589			*mbuf++ = 'l';
590			}
591
592			if (oldmode->key[0] && !mode->key[0])
593			{
594			if (what != -1)
595			{
596			*mbuf++ = '-';
597			what = -1;
598			}
599			*mbuf++ = 'k';
600			len = ircsprintf(pbuf, "%s ", oldmode->key);
601			pbuf += len;
602			}
603
604			if (mode->limit != 0 && oldmode->limit != mode->limit)
605			{
606			if (what != 1)
607			{
608			*mbuf++ = '+';
609			what = 1;
610			}
611			*mbuf++ = 'l';
612			len = ircsprintf(pbuf, "%d ", mode->limit);
613			pbuf += len;
614			}
615
616			if (mode->key[0] && strcmp(oldmode->key, mode->key))
617			{
618			if (what != 1)
619			{
620			*mbuf++ = '+';
621			what = 1;
622			}
623			*mbuf++ = 'k';
624			len = ircsprintf(pbuf, "%s ", mode->key);
625			pbuf += len;
626			}
627			*mbuf = '\0';
628			}
629
630			/* remove_our_modes()
631			*
632			* inputs - pointer to channel to remove modes from
633			* - client pointer
634			* output - NONE
635			* side effects - Go through the local members, remove all their
636			* chanop modes etc., this side lost the TS.
637			*/
638			static void
639			remove_our_modes(struct Channel chptr, struct Client source_p)
640			{
641			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
642			#ifdef HALFOPS
643			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
644			#endif
645			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
646			}
647
648			/* remove_a_mode()
649			*
650			* inputs -
651			* output - NONE
652			* side effects - remove ONE mode from a channel
653			*/
654			static void
655			remove_a_mode(struct Channel chptr, struct Client source_p,
656			int mask, char flag)
657			{
658			dlink_node *ptr;
659			struct Membership *ms;
660			char lmodebuf[MODEBUFLEN];
661			const char *lpara[MAXMODEPARAMS];
662			int count = 0;
663			int lcount;
664
665			mbuf = lmodebuf;
666			*mbuf++ = '-';
667
668			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
669			lpara[lcount] = "";
670			sendbuf[0] = '\0';
671
672			DLINK_FOREACH(ptr, chptr->members.head)
673			{
674			ms = ptr->data;
675
676			if ((ms->flags & mask) == 0)
677			continue;
678
679			ms->flags &= ~mask;
680
681			lpara[count++] = ms->client_p->name;
682
683			*mbuf++ = flag;
684
685			if (count >= MAXMODEPARAMS)
686			{
687			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
688			{
689			if (*lpara[lcount] == '\0')
690			break;
691
692			strlcat(sendbuf, " ", sizeof(sendbuf));
693			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
694			lpara[lcount] = "";
695			}
696
697			*mbuf = '\0';
698			sendto_channel_local(ALL_MEMBERS, NO, chptr,
699			":%s MODE %s %s%s",
700			(IsHidden(source_p) \|\|
701			ConfigServerHide.hide_servers) ?
702			me.name : source_p->name,
703			chptr->chname, lmodebuf, sendbuf);
704			mbuf = lmodebuf;
705			*mbuf++ = '-';
706			count = 0;
707			sendbuf[0] = '\0';
708			}
709			}
710
711			if (count != 0)
712			{
713			*mbuf = '\0';
714			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
715			{
716			if (*lpara[lcount] == '\0')
717			break;
718
719			strlcat(sendbuf, " ", sizeof(sendbuf));
720			strlcat(sendbuf, lpara[lcount], sizeof(sendbuf));
721			}
722			sendto_channel_local(ALL_MEMBERS, NO, chptr,
723			":%s MODE %s %s%s",
724			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
725			me.name : source_p->name,
726			chptr->chname, lmodebuf, sendbuf);
727			}
728			}
729