modules/core/m_sjoin.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_sjoin.c: Joins a user to a channel.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

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


static char modebuf[MODEBUFLEN];
static char parabuf[MODEBUFLEN];
static char sendbuf[MODEBUFLEN];
static const char *para[MAXMODEPARAMS];
static char *mbuf;
static int pargs;

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 void remove_ban_list(struct Channel *, struct Client *, dlink_list *, char, int);


/* ms_sjoin()
 *
 * parv[0] - sender
 * parv[1] - TS
 * parv[2] - channel
 * parv[3] - modes + n arguments (key and/or limit)
 * parv[4+n] - flags+nick list (all in one parameter)
 *
 * process a SJOIN, taking the TS's into account to either ignore the
 * incoming modes or undo the existing ones or merge them, and JOIN
 * all the specified users while sending JOIN/MODEs to local clients
 */
static void
ms_sjoin(struct Client *client_p, struct Client *source_p,
         int parc, char *parv[])
{
  struct Channel *chptr = NULL;
  struct Client  *target_p = NULL;
  time_t         newts;
  time_t         oldts;
  time_t         tstosend;
  struct Mode mode, *oldmode;
  int            args = 0;
  char           keep_our_modes = 1;
  char           keep_new_modes = 1;
  char           have_many_nicks = 0;
  int            lcount;
  char           nick_prefix[4];
  char           uid_prefix[4];
  char           *np, *up;
  int            len_nick = 0;
  int            len_uid = 0;
  int            isnew = 0;
  int            buflen = 0;
  int            slen;
  unsigned       int fl;
  char           *s;
  char           *sptr;
  char nick_buf[IRCD_BUFSIZE]; /* buffer for modes and prefix */
  char uid_buf[IRCD_BUFSIZE];  /* buffer for modes/prefixes for CAP_TS6 servers */
  char           *nick_ptr, *uid_ptr;      /* pointers used for making the two mode/prefix buffers */
  char           *p; /* pointer used making sjbuf */
  dlink_node     *m;
  const char *servername = (ConfigServerHide.hide_servers || IsHidden(source_p)) ?
                            me.name : source_p->name;  

  if (IsClient(source_p) || parc < 5)
    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;
  }

  modebuf[0] = '\0';
  mbuf = modebuf;
  pargs = 0;
  newts = atol(parv[1]);

  mode.mode = 0;
  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 'r':
        mode.mode |= MODE_REGISTERED;
        break;
      case 'O':
        mode.mode |= MODE_OPERONLY;
        break;
      case 'S':
        mode.mode |= MODE_SSLONLY;
        break;
      case 'k':
        strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
        args++;

        if (parc < 5 + args)
          return;
        break;
      case 'l':
        mode.limit = atoi(parv[4 + args]);
        args++;

        if (parc < 5 + args)
          return;
        break;
    }
  }

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

  parabuf[0] = '\0';
  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 = tstosend = newts;
  else if (newts == 0 || oldts == 0)
    chptr->channelts = tstosend = 0;
  else if (newts == oldts)
    tstosend = oldts;
  else if (newts < oldts)
  {
    keep_our_modes = 0;
    chptr->channelts = tstosend = newts;
  }
  else
  {
    keep_new_modes = 0;
    tstosend = oldts;
  }

  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')
  {
    /* 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 (parv[3][0] != '0' && keep_new_modes)
  {
    channel_modes(chptr, source_p, modebuf, parabuf);
  }
  else
  {
    modebuf[0] = '0';
    modebuf[1] = '\0';
  }

  buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
                      source_p->name, (unsigned long)tstosend,
                      chptr->chname, modebuf, parabuf);
  nick_ptr = nick_buf + buflen;

  buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
                      ID(source_p), (unsigned long)tstosend,
                      chptr->chname, modebuf, parabuf);
  uid_ptr = uid_buf + buflen;

  /* check we can fit a nick on the end, as well as \r\n and a prefix "
   * @%+", and a space.
   */
  if (buflen >= (IRCD_BUFSIZE - IRCD_MAX(NICKLEN, IDLEN) - 2 - 3 - 1))
  {
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "Long SJOIN from server: %s(via %s) (ignored)",
                         source_p->name, client_p->name);
    return;
  }

  mbuf = modebuf;
  sendbuf[0] = '\0';
  pargs = 0;

  *mbuf++ = '+';

  s = parv[args + 4];
  while (*s == ' ')
    s++;
  if ((p = strchr(s, ' ')) != NULL)
  {
    *p++ = '\0';
    while (*p == ' ')
      p++;
    have_many_nicks = *p;
  }

  while (*s)
  {
    int valid_mode = 1;
    fl = 0;

    do
    {
      switch (*s)
      {
      case '@':
        fl |= CHFL_CHANOP;
        s++;
        break;
#ifdef HALFOPS
      case '%':
        fl |= CHFL_HALFOP;
        s++;
        break;
#endif
      case '+':
        fl |= CHFL_VOICE;
        s++;
        break;
      default:
        valid_mode = 0;
        break;
      }
    } while (valid_mode);

    target_p = find_chasing(client_p, source_p, s, NULL);

    /*
     * if the client doesnt exist, or if its fake direction/server, skip.
     * we cannot send ERR_NOSUCHNICK here because if its a UID, we cannot
     * lookup the nick, and its better to never send the numeric than only
     * sometimes.
     */
    if (target_p == NULL ||
        target_p->from != client_p ||
        !IsClient(target_p))
    {
      goto nextnick;
    }

    len_nick = strlen(target_p->name);
    len_uid = strlen(ID(target_p));

    np = nick_prefix;
    up = uid_prefix;

    if (keep_new_modes)
    {
      if (fl & CHFL_CHANOP)
      {
        *np++ = '@';
        *up++  = '@';
        len_nick++;
        len_uid++;
      }
#ifdef HALFOPS
      if (fl & CHFL_HALFOP)
      {
        *np++ = '%';
        *up++  = '%';
        len_nick++;
        len_uid++;
      }
#endif
      if (fl & CHFL_VOICE)
      {
        *np++ = '+';
        *up++  = '+';
        len_nick++;
        len_uid++;
      }
    }
    else
    {
      if (fl & (CHFL_CHANOP|CHFL_HALFOP))
        fl = CHFL_DEOPPED;
      else
        fl = 0;
    }
    *np = *up = '\0';

    if ((nick_ptr - nick_buf + len_nick) > (IRCD_BUFSIZE  - 2))
    {
      sendto_server(client_p, 0, CAP_TS6, "%s", nick_buf);
      
      buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
                          source_p->name, (unsigned long)tstosend,
                          chptr->chname, modebuf, parabuf);
      nick_ptr = nick_buf + buflen;
    }

    nick_ptr += ircsprintf(nick_ptr, "%s%s ", nick_prefix, target_p->name);
    
    if ((uid_ptr - uid_buf + len_uid) > (IRCD_BUFSIZE - 2))
    {
      sendto_server(client_p, CAP_TS6, 0, "%s", uid_buf);
      
      buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
                          ID(source_p), (unsigned long)tstosend,
                          chptr->chname, modebuf, parabuf);
      uid_ptr = uid_buf + buflen;
    }

    uid_ptr  += ircsprintf(uid_ptr,  "%s%s ", uid_prefix, ID(target_p));
        
    if (!IsMember(target_p, chptr))
    {
      add_user_to_channel(chptr, target_p, fl, !have_many_nicks);
      sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
                           target_p->name, target_p->username,
                           target_p->host, chptr->chname);
    }

    if (fl & CHFL_CHANOP)
    {
      *mbuf++ = 'o';
      para[pargs++] = target_p->name;

      if (pargs >= MAXMODEPARAMS)
      {
        /*
         * Ok, the code is now going to "walk" through
         * sendbuf, filling in para strings. So, I will use sptr
         * to point into the sendbuf.
         * Notice, that ircsprintf() returns the number of chars
         * successfully inserted into string.
         * - Dianora
         */

        sptr = sendbuf;
        *mbuf = '\0';
        for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
        {
          slen = ircsprintf(sptr, " %s", para[lcount]); /* see? */
          sptr += slen;                                 /* ready for next */
        }
        sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s%s",
                            servername, chptr->chname, modebuf, sendbuf);
        mbuf = modebuf;
        *mbuf++ = '+';

        sendbuf[0] = '\0';
        pargs = 0;
      }
    }
#ifdef HALFOPS
    if (fl & CHFL_HALFOP)
    {
      *mbuf++ = 'h';
      para[pargs++] = target_p->name;

      if (pargs >= MAXMODEPARAMS)
      {
        sptr = sendbuf;
        *mbuf = '\0';
        for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
        {
          slen = ircsprintf(sptr, " %s", para[lcount]);
          sptr += slen;
        }
        sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s%s",
                             servername, chptr->chname, modebuf, sendbuf);

        mbuf = modebuf;
        *mbuf++ = '+';

        sendbuf[0] = '\0';
        pargs = 0;
      }
    }
#endif
    if (fl & CHFL_VOICE)
    {
      *mbuf++ = 'v';
      para[pargs++] = target_p->name;

      if (pargs >= MAXMODEPARAMS)
      {
        sptr = sendbuf;
        *mbuf = '\0';
        for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
        {
          slen = ircsprintf(sptr, " %s", para[lcount]);
          sptr += slen;
        }
        sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s%s",
                             servername, chptr->chname, modebuf, sendbuf);

        mbuf = modebuf;
        *mbuf++ = '+';

        sendbuf[0] = '\0';
        pargs = 0;
      }
    }

  nextnick:
    if ((s = p) == NULL)
      break;
    while (*s == ' ')
      s++;
    if ((p = strchr(s, ' ')) != NULL)
    {
      *p++ = 0;
      while (*p == ' ')
        p++;
    }
  }

  *mbuf = '\0';
  *(nick_ptr - 1) = '\0';
  *(uid_ptr - 1) = '\0';

  /*
   * checking for lcount < MAXMODEPARAMS at this time is wrong
   * since the code has already verified above that pargs < MAXMODEPARAMS
   * checking for para[lcount] != '\0' is also wrong, since
   * there is no place where para[lcount] is set!
   * - Dianora
   */

  if (pargs != 0)
  {
    sptr = sendbuf;

    for (lcount = 0; lcount < pargs; lcount++)
    {
      slen = ircsprintf(sptr, " %s", para[lcount]);
      sptr += slen;
    }

    sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s%s",
                        servername, chptr->chname, modebuf, sendbuf);
  }

  /* If this happens, its the result of a malformed SJOIN
   * a remnant from the old persistent channel code. *sigh*
   * Or it could be the result of a client just leaving
   * and leaving us with a channel formed just as the client parts.
   * - Dianora
   */

  if ((dlink_list_length(&chptr->members) == 0) && isnew)
  {
    destroy_channel(chptr);
    return;
  }

  if (parv[4 + args][0] == '\0')
    return;

  /* relay the SJOIN to other servers */
  DLINK_FOREACH(m, serv_list.head)
  {
    target_p = m->data;

    if (target_p == client_p)
      continue;

    if (IsCapable(target_p, CAP_TS6))
      sendto_one(target_p, "%s", uid_buf);
    else
      sendto_one(target_p, "%s", nick_buf);
  }

  if (HasID(source_p) && !keep_our_modes)
  {
    if (dlink_list_length(&chptr->banlist) > 0)
      remove_ban_list(chptr, client_p, &chptr->banlist,
                      'b', NOCAPS);

    if (dlink_list_length(&chptr->exceptlist) > 0)
      remove_ban_list(chptr, client_p, &chptr->exceptlist,
                      'e', CAP_EX);

    if (dlink_list_length(&chptr->invexlist) > 0)
      remove_ban_list(chptr, client_p, &chptr->invexlist,
                      'I', CAP_IE);
    clear_ban_cache(chptr);
  }               
}

/* 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 len;

  *mbuf++ = '-';

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

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

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

  if (*(mbuf-1) == '-')
    *(mbuf-1) = '+';
  else
    *mbuf++ = '+';

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

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

  if (mode->key[0] && strcmp(oldmode->key, mode->key))
  {
    *mbuf++ = 'k';
    len = ircsprintf(pbuf, "%s ", mode->key);
    pbuf += len;
    pargs++;
  }
  if (*(mbuf-1) == '+')
    *(mbuf-1) = '\0';
  else
    *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       - pointer to channel
 *              - server or client removing the mode
 *              - mask o/h/v mask to be removed
 *              - flag o/h/v to be removed
 * output       - NONE
 * side effects - remove ONE mode from all members of 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];
  char *sp=sendbuf;
  const char *lpara[MAXMODEPARAMS];
  int count = 0;
  int i;
  int l;

  mbuf = lmodebuf;
  *mbuf++ = '-';
  *sp = '\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(i = 0; i < MAXMODEPARAMS; i++)
      {
        l = ircsprintf(sp, " %s", lpara[i]);
        sp += l;
      }

      *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;
      sp = sendbuf;
      *sp = '\0';
    }
  }

  if (count != 0)
  {
    *mbuf = '\0';
    for(i = 0; i < count; i++)
    {
      l = ircsprintf(sp, " %s", lpara[i]);
      sp += l;
    }
    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);
  }
}

/* remove_ban_list()
 *
 * inputs       - channel, source, list to remove, char of mode, caps required
 * outputs      - none
 * side effects - given ban list is removed, modes are sent to local clients and
 *                non-ts6 servers linked through another uplink other than source_p
 */
static void
remove_ban_list(struct Channel *chptr, struct Client *source_p,
                dlink_list *list, char c, int cap)
{
  char lmodebuf[MODEBUFLEN];
  char lparabuf[IRCD_BUFSIZE];
  struct Ban *banptr = NULL;
  dlink_node *ptr = NULL;
  dlink_node *next_ptr = NULL;
  char *pbuf = NULL;
  int count = 0;      
  int cur_len, mlen, plen;

  pbuf = lparabuf;
  
  cur_len = mlen = ircsprintf(lmodebuf, ":%s MODE %s -",
                              source_p->name, chptr->chname);
  mbuf = lmodebuf + mlen;

  DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
  {
    banptr = ptr->data;

    plen = banptr->len + 4;  /* another +b and "!@ " */
    if (count >= MAXMODEPARAMS ||
        (cur_len + 1 /* space between */ + (plen - 1)) > IRCD_BUFSIZE - 2)
    {
      /* NUL-terminate and remove trailing space */
      *mbuf = *(pbuf - 1) = '\0';
      sendto_channel_local(ALL_MEMBERS, 0, chptr, "%s %s",
               lmodebuf, lparabuf);
      sendto_server(source_p, cap, CAP_TS6,
                    "%s %s", lmodebuf, lparabuf);

      cur_len = mlen;
      mbuf = lmodebuf + mlen;
      pbuf = lparabuf;
      count = 0;
    }     

    *mbuf++ = c;
    cur_len += plen;
    pbuf += ircsprintf(pbuf, "%s!%s@%s ", banptr->name, banptr->username,
                       banptr->host);
    ++count;

    remove_ban(banptr, list);
  }

  *mbuf = *(pbuf - 1) = '\0';
  sendto_channel_local(ALL_MEMBERS, 0, chptr, "%s %s", lmodebuf, lparabuf);
  sendto_server(source_p, cap, CAP_TS6,
                "%s %s", lmodebuf, lparabuf);
}

static struct Message sjoin_msgtab = {
  "SJOIN", 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
  {m_unregistered, m_ignore, ms_sjoin, m_ignore, m_ignore, m_ignore}
};

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

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

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = MODULE_FLAG_CORE
};
Revision:	1474
Committed:	Sun Jul 22 14:44:07 2012 UTC (11 years, 8 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/core/m_sjoin.c*
File size:	20986 byte(s)
Log Message:	- removed &localchannels
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_sjoin.c: Joins a user to a channel.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26	michael	1011	#include "list.h"
27	adx	30	#include "channel.h"
28			#include "channel_mode.h"
29			#include "client.h"
30			#include "hash.h"
31			#include "irc_string.h"
32			#include "sprintf_irc.h"
33			#include "ircd.h"
34			#include "numeric.h"
35			#include "send.h"
36			#include "parse.h"
37			#include "modules.h"
38			#include "s_serv.h"
39	michael	1309	#include "conf.h"
40	michael	1243	#include "s_misc.h"
41	adx	30
42
43			static char modebuf[MODEBUFLEN];
44			static char parabuf[MODEBUFLEN];
45			static char sendbuf[MODEBUFLEN];
46			static const char *para[MAXMODEPARAMS];
47			static char *mbuf;
48			static int pargs;
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			static void remove_ban_list(struct Channel , struct Client , dlink_list *, char, int);
54
55	michael	885
56	adx	30	/* ms_sjoin()
57			*
58			* parv[0] - sender
59			* parv[1] - TS
60			* parv[2] - channel
61			* parv[3] - modes + n arguments (key and/or limit)
62			* parv[4+n] - flags+nick list (all in one parameter)
63			*
64			* process a SJOIN, taking the TS's into account to either ignore the
65			* incoming modes or undo the existing ones or merge them, and JOIN
66			* all the specified users while sending JOIN/MODEs to local clients
67			*/
68			static void
69			ms_sjoin(struct Client client_p, struct Client source_p,
70			int parc, char *parv[])
71			{
72	michael	632	struct Channel *chptr = NULL;
73			struct Client *target_p = NULL;
74	adx	30	time_t newts;
75			time_t oldts;
76			time_t tstosend;
77	michael	632	struct Mode mode, *oldmode;
78	adx	30	int args = 0;
79	michael	1243	char keep_our_modes = 1;
80			char keep_new_modes = 1;
81			char have_many_nicks = 0;
82	adx	30	int lcount;
83			char nick_prefix[4];
84			char uid_prefix[4];
85			char np, up;
86			int len_nick = 0;
87			int len_uid = 0;
88	michael	632	int isnew = 0;
89	adx	30	int buflen = 0;
90			int slen;
91			unsigned int fl;
92			char *s;
93			char *sptr;
94			char nick_buf[IRCD_BUFSIZE]; /* buffer for modes and prefix */
95			char uid_buf[IRCD_BUFSIZE]; /* buffer for modes/prefixes for CAP_TS6 servers */
96			char nick_ptr, uid_ptr; /* pointers used for making the two mode/prefix buffers */
97			char p; / pointer used making sjbuf */
98			dlink_node *m;
99			const char *servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
100			me.name : source_p->name;
101
102			if (IsClient(source_p) \|\| parc < 5)
103			return;
104
105	michael	632	if (!check_channel_name(parv[2], 0))
106			{
107			sendto_realops_flags(UMODE_DEBUG, L_ALL,
108			"*** Too long or invalid channel name from %s: %s",
109			client_p->name, parv[2]);
110	adx	30	return;
111	michael	632	}
112	adx	30
113			modebuf[0] = '\0';
114			mbuf = modebuf;
115			pargs = 0;
116			newts = atol(parv[1]);
117
118			mode.mode = 0;
119			mode.limit = 0;
120			mode.key[0] = '\0';
121
122	michael	632	for (s = parv[3]; *s; ++s)
123	adx	30	{
124	michael	632	switch (*s)
125	adx	30	{
126			case 't':
127			mode.mode \|= MODE_TOPICLIMIT;
128			break;
129			case 'n':
130			mode.mode \|= MODE_NOPRIVMSGS;
131			break;
132			case 's':
133			mode.mode \|= MODE_SECRET;
134			break;
135			case 'm':
136			mode.mode \|= MODE_MODERATED;
137			break;
138			case 'i':
139			mode.mode \|= MODE_INVITEONLY;
140			break;
141			case 'p':
142			mode.mode \|= MODE_PRIVATE;
143			break;
144	michael	1167	case 'r':
145			mode.mode \|= MODE_REGISTERED;
146			break;
147	michael	1150	case 'O':
148			mode.mode \|= MODE_OPERONLY;
149			break;
150			case 'S':
151			mode.mode \|= MODE_SSLONLY;
152			break;
153	adx	30	case 'k':
154			strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
155			args++;
156	michael	632
157			if (parc < 5 + args)
158	adx	30	return;
159			break;
160			case 'l':
161			mode.limit = atoi(parv[4 + args]);
162			args++;
163	michael	632
164			if (parc < 5 + args)
165	adx	30	return;
166			break;
167			}
168			}
169
170	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
171			{
172			isnew = 1;
173			chptr = make_channel(parv[2]);
174			}
175
176	adx	30	parabuf[0] = '\0';
177	michael	632	oldts = chptr->channelts;
178	adx	30	oldmode = &chptr->mode;
179
180			if (ConfigFileEntry.ignore_bogus_ts)
181			{
182			if (newts < 800000000)
183			{
184			sendto_realops_flags(UMODE_DEBUG, L_ALL,
185			"*** Bogus TS %lu on %s ignored from %s",
186			(unsigned long)newts, chptr->chname,
187			client_p->name);
188
189			newts = (oldts == 0) ? 0 : 800000000;
190			}
191			}
192			else
193			{
194			if (!newts && !isnew && oldts)
195			{
196	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr,
197	adx	30	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
198			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
199			sendto_realops_flags(UMODE_ALL, L_ALL,
200			"Server %s changing TS on %s from %lu to 0",
201			source_p->name, chptr->chname, (unsigned long)oldts);
202			}
203			}
204
205			if (isnew)
206			chptr->channelts = tstosend = newts;
207			else if (newts == 0 \|\| oldts == 0)
208			chptr->channelts = tstosend = 0;
209			else if (newts == oldts)
210			tstosend = oldts;
211			else if (newts < oldts)
212			{
213	michael	1243	keep_our_modes = 0;
214	adx	30	chptr->channelts = tstosend = newts;
215			}
216			else
217			{
218	michael	1243	keep_new_modes = 0;
219	adx	30	tstosend = oldts;
220			}
221
222			if (!keep_new_modes)
223			mode = *oldmode;
224			else if (keep_our_modes)
225			{
226			mode.mode \|= oldmode->mode;
227			if (oldmode->limit > mode.limit)
228			mode.limit = oldmode->limit;
229			if (strcmp(mode.key, oldmode->key) < 0)
230			strcpy(mode.key, oldmode->key);
231			}
232			set_final_mode(&mode, oldmode);
233			chptr->mode = mode;
234
235			/* Lost the TS, other side wins, so remove modes on this side */
236			if (!keep_our_modes)
237			{
238			remove_our_modes(chptr, source_p);
239	michael	873
240	michael	1203	if (chptr->topic[0])
241	michael	873	{
242	michael	1203	set_channel_topic(chptr, "", "", 0);
243	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :",
244	michael	873	(IsHidden(source_p) \|\|
245			ConfigServerHide.hide_servers) ?
246			me.name : source_p->name, chptr->chname);
247			}
248
249	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr,
250	adx	30	":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
251			me.name, chptr->chname, chptr->chname,
252			(unsigned long)oldts, (unsigned long)newts);
253			}
254
255			if (*modebuf != '\0')
256			{
257			/* This _SHOULD_ be to ALL_MEMBERS
258			* It contains only +imnpstlk, etc */
259	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s %s",
260	adx	30	servername, chptr->chname, modebuf, parabuf);
261			}
262
263			if (parv[3][0] != '0' && keep_new_modes)
264			{
265			channel_modes(chptr, source_p, modebuf, parabuf);
266			}
267			else
268			{
269			modebuf[0] = '0';
270			modebuf[1] = '\0';
271			}
272
273			buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
274			source_p->name, (unsigned long)tstosend,
275			chptr->chname, modebuf, parabuf);
276			nick_ptr = nick_buf + buflen;
277
278			buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
279			ID(source_p), (unsigned long)tstosend,
280			chptr->chname, modebuf, parabuf);
281			uid_ptr = uid_buf + buflen;
282
283			/* check we can fit a nick on the end, as well as \r\n and a prefix "
284			* @%+", and a space.
285			*/
286			if (buflen >= (IRCD_BUFSIZE - IRCD_MAX(NICKLEN, IDLEN) - 2 - 3 - 1))
287			{
288			sendto_realops_flags(UMODE_ALL, L_ALL,
289			"Long SJOIN from server: %s(via %s) (ignored)",
290			source_p->name, client_p->name);
291			return;
292			}
293
294			mbuf = modebuf;
295			sendbuf[0] = '\0';
296			pargs = 0;
297
298			*mbuf++ = '+';
299
300			s = parv[args + 4];
301			while (*s == ' ')
302			s++;
303			if ((p = strchr(s, ' ')) != NULL)
304			{
305			*p++ = '\0';
306			while (*p == ' ')
307			p++;
308			have_many_nicks = *p;
309			}
310
311			while (*s)
312			{
313	michael	1243	int valid_mode = 1;
314	adx	30	fl = 0;
315
316			do
317			{
318			switch (*s)
319			{
320			case '@':
321			fl \|= CHFL_CHANOP;
322			s++;
323			break;
324			#ifdef HALFOPS
325			case '%':
326			fl \|= CHFL_HALFOP;
327			s++;
328			break;
329			#endif
330			case '+':
331			fl \|= CHFL_VOICE;
332			s++;
333			break;
334			default:
335	michael	1243	valid_mode = 0;
336	adx	30	break;
337			}
338			} while (valid_mode);
339
340			target_p = find_chasing(client_p, source_p, s, NULL);
341
342			/*
343			* if the client doesnt exist, or if its fake direction/server, skip.
344			* we cannot send ERR_NOSUCHNICK here because if its a UID, we cannot
345			* lookup the nick, and its better to never send the numeric than only
346			* sometimes.
347			*/
348			if (target_p == NULL \|\|
349			target_p->from != client_p \|\|
350			!IsClient(target_p))
351			{
352			goto nextnick;
353			}
354
355			len_nick = strlen(target_p->name);
356			len_uid = strlen(ID(target_p));
357
358			np = nick_prefix;
359			up = uid_prefix;
360
361			if (keep_new_modes)
362			{
363			if (fl & CHFL_CHANOP)
364			{
365			*np++ = '@';
366			*up++ = '@';
367			len_nick++;
368			len_uid++;
369			}
370			#ifdef HALFOPS
371			if (fl & CHFL_HALFOP)
372			{
373			*np++ = '%';
374			*up++ = '%';
375			len_nick++;
376			len_uid++;
377			}
378			#endif
379			if (fl & CHFL_VOICE)
380			{
381			*np++ = '+';
382			*up++ = '+';
383			len_nick++;
384			len_uid++;
385			}
386			}
387			else
388			{
389			if (fl & (CHFL_CHANOP\|CHFL_HALFOP))
390			fl = CHFL_DEOPPED;
391			else
392			fl = 0;
393			}
394			np = up = '\0';
395
396			if ((nick_ptr - nick_buf + len_nick) > (IRCD_BUFSIZE - 2))
397			{
398	michael	1474	sendto_server(client_p, 0, CAP_TS6, "%s", nick_buf);
399	adx	30
400			buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
401			source_p->name, (unsigned long)tstosend,
402			chptr->chname, modebuf, parabuf);
403			nick_ptr = nick_buf + buflen;
404			}
405	michael	885
406	adx	30	nick_ptr += ircsprintf(nick_ptr, "%s%s ", nick_prefix, target_p->name);
407
408			if ((uid_ptr - uid_buf + len_uid) > (IRCD_BUFSIZE - 2))
409			{
410	michael	1474	sendto_server(client_p, CAP_TS6, 0, "%s", uid_buf);
411	adx	30
412			buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
413			ID(source_p), (unsigned long)tstosend,
414			chptr->chname, modebuf, parabuf);
415			uid_ptr = uid_buf + buflen;
416			}
417
418			uid_ptr += ircsprintf(uid_ptr, "%s%s ", uid_prefix, ID(target_p));
419
420			if (!IsMember(target_p, chptr))
421			{
422			add_user_to_channel(chptr, target_p, fl, !have_many_nicks);
423	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN :%s",
424	adx	30	target_p->name, target_p->username,
425			target_p->host, chptr->chname);
426			}
427
428			if (fl & CHFL_CHANOP)
429			{
430			*mbuf++ = 'o';
431			para[pargs++] = target_p->name;
432
433			if (pargs >= MAXMODEPARAMS)
434			{
435			/*
436			* Ok, the code is now going to "walk" through
437			* sendbuf, filling in para strings. So, I will use sptr
438			* to point into the sendbuf.
439			* Notice, that ircsprintf() returns the number of chars
440			* successfully inserted into string.
441			* - Dianora
442			*/
443
444			sptr = sendbuf;
445			*mbuf = '\0';
446			for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
447			{
448			slen = ircsprintf(sptr, " %s", para[lcount]); /* see? */
449			sptr += slen; /* ready for next */
450			}
451	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s%s",
452	adx	30	servername, chptr->chname, modebuf, sendbuf);
453			mbuf = modebuf;
454			*mbuf++ = '+';
455
456			sendbuf[0] = '\0';
457			pargs = 0;
458			}
459			}
460			#ifdef HALFOPS
461			if (fl & CHFL_HALFOP)
462			{
463			*mbuf++ = 'h';
464			para[pargs++] = target_p->name;
465
466			if (pargs >= MAXMODEPARAMS)
467			{
468			sptr = sendbuf;
469			*mbuf = '\0';
470			for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
471			{
472			slen = ircsprintf(sptr, " %s", para[lcount]);
473			sptr += slen;
474			}
475	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s%s",
476	adx	30	servername, chptr->chname, modebuf, sendbuf);
477
478			mbuf = modebuf;
479			*mbuf++ = '+';
480
481			sendbuf[0] = '\0';
482			pargs = 0;
483			}
484			}
485			#endif
486			if (fl & CHFL_VOICE)
487			{
488			*mbuf++ = 'v';
489			para[pargs++] = target_p->name;
490
491			if (pargs >= MAXMODEPARAMS)
492			{
493			sptr = sendbuf;
494			*mbuf = '\0';
495			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
496			{
497			slen = ircsprintf(sptr, " %s", para[lcount]);
498			sptr += slen;
499			}
500	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s%s",
501	adx	30	servername, chptr->chname, modebuf, sendbuf);
502
503			mbuf = modebuf;
504			*mbuf++ = '+';
505
506			sendbuf[0] = '\0';
507			pargs = 0;
508			}
509			}
510
511			nextnick:
512			if ((s = p) == NULL)
513			break;
514			while (*s == ' ')
515			s++;
516			if ((p = strchr(s, ' ')) != NULL)
517			{
518			*p++ = 0;
519			while (*p == ' ')
520			p++;
521			}
522			}
523
524			*mbuf = '\0';
525			*(nick_ptr - 1) = '\0';
526			*(uid_ptr - 1) = '\0';
527
528			/*
529			* checking for lcount < MAXMODEPARAMS at this time is wrong
530			* since the code has already verified above that pargs < MAXMODEPARAMS
531			* checking for para[lcount] != '\0' is also wrong, since
532			* there is no place where para[lcount] is set!
533			* - Dianora
534			*/
535
536			if (pargs != 0)
537			{
538			sptr = sendbuf;
539
540			for (lcount = 0; lcount < pargs; lcount++)
541			{
542			slen = ircsprintf(sptr, " %s", para[lcount]);
543			sptr += slen;
544			}
545
546	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s%s",
547	adx	30	servername, chptr->chname, modebuf, sendbuf);
548			}
549
550			/* If this happens, its the result of a malformed SJOIN
551			* a remnant from the old persistent channel code. sigh
552			* Or it could be the result of a client just leaving
553			* and leaving us with a channel formed just as the client parts.
554			* - Dianora
555			*/
556
557			if ((dlink_list_length(&chptr->members) == 0) && isnew)
558			{
559			destroy_channel(chptr);
560			return;
561			}
562
563			if (parv[4 + args][0] == '\0')
564			return;
565
566			/* relay the SJOIN to other servers */
567			DLINK_FOREACH(m, serv_list.head)
568			{
569			target_p = m->data;
570
571			if (target_p == client_p)
572			continue;
573
574			if (IsCapable(target_p, CAP_TS6))
575			sendto_one(target_p, "%s", uid_buf);
576			else
577			sendto_one(target_p, "%s", nick_buf);
578			}
579
580			if (HasID(source_p) && !keep_our_modes)
581			{
582			if (dlink_list_length(&chptr->banlist) > 0)
583			remove_ban_list(chptr, client_p, &chptr->banlist,
584			'b', NOCAPS);
585
586			if (dlink_list_length(&chptr->exceptlist) > 0)
587			remove_ban_list(chptr, client_p, &chptr->exceptlist,
588			'e', CAP_EX);
589
590			if (dlink_list_length(&chptr->invexlist) > 0)
591			remove_ban_list(chptr, client_p, &chptr->invexlist,
592			'I', CAP_IE);
593			clear_ban_cache(chptr);
594			}
595			}
596
597			/* set_final_mode
598			*
599			* inputs - channel mode
600			* - old channel mode
601			* output - NONE
602			* side effects - walk through all the channel modes turning off modes
603			* that were on in oldmode but aren't on in mode.
604			* Then walk through turning on modes that are on in mode
605			* but were not set in oldmode.
606			*/
607			static void
608			set_final_mode(struct Mode mode, struct Mode oldmode)
609			{
610	michael	1175	const struct mode_letter *tab;
611	adx	30	char *pbuf = parabuf;
612			int len;
613
614			*mbuf++ = '-';
615
616	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
617	adx	30	{
618	michael	1175	if ((tab->mode & oldmode->mode) &&
619			!(tab->mode & mode->mode))
620			*mbuf++ = tab->letter;
621	adx	30	}
622
623			if (oldmode->limit != 0 && mode->limit == 0)
624			*mbuf++ = 'l';
625
626			if (oldmode->key[0] && !mode->key[0])
627			{
628			*mbuf++ = 'k';
629			len = ircsprintf(pbuf, "%s ", oldmode->key);
630			pbuf += len;
631			pargs++;
632			}
633
634			if (*(mbuf-1) == '-')
635			*(mbuf-1) = '+';
636			else
637			*mbuf++ = '+';
638
639	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
640	adx	30	{
641	michael	1175	if ((tab->mode & mode->mode) &&
642			!(tab->mode & oldmode->mode))
643			*mbuf++ = tab->letter;
644	adx	30	}
645
646			if (mode->limit != 0 && oldmode->limit != mode->limit)
647			{
648			*mbuf++ = 'l';
649			len = ircsprintf(pbuf, "%d ", mode->limit);
650			pbuf += len;
651			pargs++;
652			}
653
654			if (mode->key[0] && strcmp(oldmode->key, mode->key))
655			{
656			*mbuf++ = 'k';
657			len = ircsprintf(pbuf, "%s ", mode->key);
658			pbuf += len;
659			pargs++;
660			}
661			if (*(mbuf-1) == '+')
662			*(mbuf-1) = '\0';
663			else
664			*mbuf = '\0';
665			}
666
667			/* remove_our_modes()
668			*
669			* inputs - pointer to channel to remove modes from
670			* - client pointer
671			* output - NONE
672			* side effects - Go through the local members, remove all their
673			* chanop modes etc., this side lost the TS.
674			*/
675			static void
676			remove_our_modes(struct Channel chptr, struct Client source_p)
677			{
678			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
679			#ifdef HALFOPS
680			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
681			#endif
682			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
683			}
684
685			/* remove_a_mode()
686			*
687			* inputs - pointer to channel
688			* - server or client removing the mode
689			* - mask o/h/v mask to be removed
690			* - flag o/h/v to be removed
691			* output - NONE
692			* side effects - remove ONE mode from all members of a channel
693			*/
694			static void
695			remove_a_mode(struct Channel chptr, struct Client source_p,
696			int mask, char flag)
697			{
698			dlink_node *ptr;
699			struct Membership *ms;
700			char lmodebuf[MODEBUFLEN];
701			char *sp=sendbuf;
702			const char *lpara[MAXMODEPARAMS];
703			int count = 0;
704			int i;
705			int l;
706
707			mbuf = lmodebuf;
708			*mbuf++ = '-';
709			*sp = '\0';
710
711			DLINK_FOREACH(ptr, chptr->members.head)
712			{
713			ms = ptr->data;
714
715			if ((ms->flags & mask) == 0)
716			continue;
717
718			ms->flags &= ~mask;
719
720			lpara[count++] = ms->client_p->name;
721
722			*mbuf++ = flag;
723
724			if (count >= MAXMODEPARAMS)
725			{
726			for(i = 0; i < MAXMODEPARAMS; i++)
727			{
728			l = ircsprintf(sp, " %s", lpara[i]);
729			sp += l;
730			}
731
732			*mbuf = '\0';
733	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr,
734	adx	30	":%s MODE %s %s%s",
735			(IsHidden(source_p) \|\|
736			ConfigServerHide.hide_servers) ?
737			me.name : source_p->name,
738			chptr->chname, lmodebuf, sendbuf);
739			mbuf = lmodebuf;
740			*mbuf++ = '-';
741			count = 0;
742			sp = sendbuf;
743			*sp = '\0';
744			}
745			}
746
747			if (count != 0)
748			{
749			*mbuf = '\0';
750			for(i = 0; i < count; i++)
751			{
752			l = ircsprintf(sp, " %s", lpara[i]);
753			sp += l;
754			}
755	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr,
756	adx	30	":%s MODE %s %s%s",
757			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
758			me.name : source_p->name,
759			chptr->chname, lmodebuf, sendbuf);
760			}
761			}
762
763			/* remove_ban_list()
764			*
765			* inputs - channel, source, list to remove, char of mode, caps required
766			* outputs - none
767			* side effects - given ban list is removed, modes are sent to local clients and
768			* non-ts6 servers linked through another uplink other than source_p
769			*/
770			static void
771			remove_ban_list(struct Channel chptr, struct Client source_p,
772			dlink_list *list, char c, int cap)
773			{
774			char lmodebuf[MODEBUFLEN];
775			char lparabuf[IRCD_BUFSIZE];
776			struct Ban *banptr = NULL;
777			dlink_node *ptr = NULL;
778			dlink_node *next_ptr = NULL;
779			char *pbuf = NULL;
780			int count = 0;
781			int cur_len, mlen, plen;
782
783			pbuf = lparabuf;
784
785			cur_len = mlen = ircsprintf(lmodebuf, ":%s MODE %s -",
786			source_p->name, chptr->chname);
787			mbuf = lmodebuf + mlen;
788
789			DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
790			{
791			banptr = ptr->data;
792
793			plen = banptr->len + 4; /* another +b and "!@ " */
794			if (count >= MAXMODEPARAMS \|\|
795			(cur_len + 1 /* space between */ + (plen - 1)) > IRCD_BUFSIZE - 2)
796			{
797			/* NUL-terminate and remove trailing space */
798			mbuf = (pbuf - 1) = '\0';
799	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, "%s %s",
800	adx	30	lmodebuf, lparabuf);
801	michael	1474	sendto_server(source_p, cap, CAP_TS6,
802	adx	30	"%s %s", lmodebuf, lparabuf);
803
804			cur_len = mlen;
805			mbuf = lmodebuf + mlen;
806			pbuf = lparabuf;
807			count = 0;
808			}
809
810			*mbuf++ = c;
811			cur_len += plen;
812			pbuf += ircsprintf(pbuf, "%s!%s@%s ", banptr->name, banptr->username,
813			banptr->host);
814			++count;
815
816			remove_ban(banptr, list);
817			}
818
819			mbuf = (pbuf - 1) = '\0';
820	michael	1243	sendto_channel_local(ALL_MEMBERS, 0, chptr, "%s %s", lmodebuf, lparabuf);
821	michael	1474	sendto_server(source_p, cap, CAP_TS6,
822	adx	30	"%s %s", lmodebuf, lparabuf);
823			}
824	michael	1230
825			static struct Message sjoin_msgtab = {
826			"SJOIN", 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
827			{m_unregistered, m_ignore, ms_sjoin, m_ignore, m_ignore, m_ignore}
828			};
829
830			static void
831			module_init(void)
832			{
833			mod_add_cmd(&sjoin_msgtab);
834			}
835
836			static void
837			module_exit(void)
838			{
839			mod_del_cmd(&sjoin_msgtab);
840			}
841
842			struct module module_entry = {
843			.node = { NULL, NULL, NULL },
844			.name = NULL,
845			.version = "$Revision$",
846			.handle = NULL,
847			.modinit = module_init,
848			.modexit = module_exit,
849			.flags = MODULE_FLAG_CORE
850			};