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 "handlers.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "common.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "s_serv.h"
#include "s_conf.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 = YES;
  char           keep_new_modes = YES;
  char           have_many_nicks = NO;
  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;

  /* SJOIN's for local channels can't happen. */
  if (*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;
  }

  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, 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 = 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 = NO;
    chptr->channelts = tstosend = newts;
  }
  else
  {
    keep_new_modes = NO;
    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, NO, chptr, ":%s TOPIC %s :",
                           (IsHidden(source_p) ||
                           ConfigServerHide.hide_servers) ?
                           me.name : source_p->name, chptr->chname);
    }

    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')
  {
    /* 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 (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 = YES;
    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 = NO;
        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, chptr, 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, chptr, 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, NO, 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, NO, 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, NO, 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, NO, 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, NO, 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, 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;
      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, NO, 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, NO, chptr, "%s %s",
               lmodebuf, lparabuf);
      sendto_server(source_p, chptr, 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, NO, chptr, "%s %s", lmodebuf, lparabuf);
  sendto_server(source_p, chptr, 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:	1230
Committed:	Thu Sep 22 19:41:19 2011 UTC (13 years, 11 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/core/m_sjoin.c*
File size:	21163 byte(s)
Log Message:	- cleanup module loader. Make module api more flexible
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_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 "handlers.h"
28			#include "channel.h"
29			#include "channel_mode.h"
30			#include "client.h"
31			#include "hash.h"
32			#include "irc_string.h"
33			#include "sprintf_irc.h"
34			#include "ircd.h"
35			#include "numeric.h"
36			#include "send.h"
37			#include "common.h"
38			#include "msg.h"
39			#include "parse.h"
40			#include "modules.h"
41			#include "s_serv.h"
42			#include "s_conf.h"
43
44
45			static char modebuf[MODEBUFLEN];
46			static char parabuf[MODEBUFLEN];
47			static char sendbuf[MODEBUFLEN];
48			static const char *para[MAXMODEPARAMS];
49			static char *mbuf;
50			static int pargs;
51
52			static void set_final_mode(struct Mode , struct Mode );
53			static void remove_our_modes(struct Channel , struct Client );
54			static void remove_a_mode(struct Channel , struct Client , int, char);
55			static void remove_ban_list(struct Channel , struct Client , dlink_list *, char, int);
56
57	michael	885
58	adx	30	/* ms_sjoin()
59			*
60			* parv[0] - sender
61			* parv[1] - TS
62			* parv[2] - channel
63			* parv[3] - modes + n arguments (key and/or limit)
64			* parv[4+n] - flags+nick list (all in one parameter)
65			*
66			* process a SJOIN, taking the TS's into account to either ignore the
67			* incoming modes or undo the existing ones or merge them, and JOIN
68			* all the specified users while sending JOIN/MODEs to local clients
69			*/
70			static void
71			ms_sjoin(struct Client client_p, struct Client source_p,
72			int parc, char *parv[])
73			{
74	michael	632	struct Channel *chptr = NULL;
75			struct Client *target_p = NULL;
76	adx	30	time_t newts;
77			time_t oldts;
78			time_t tstosend;
79	michael	632	struct Mode mode, *oldmode;
80	adx	30	int args = 0;
81			char keep_our_modes = YES;
82			char keep_new_modes = YES;
83			char have_many_nicks = NO;
84			int lcount;
85			char nick_prefix[4];
86			char uid_prefix[4];
87			char np, up;
88			int len_nick = 0;
89			int len_uid = 0;
90	michael	632	int isnew = 0;
91	adx	30	int buflen = 0;
92			int slen;
93			unsigned int fl;
94			char *s;
95			char *sptr;
96			char nick_buf[IRCD_BUFSIZE]; /* buffer for modes and prefix */
97			char uid_buf[IRCD_BUFSIZE]; /* buffer for modes/prefixes for CAP_TS6 servers */
98			char nick_ptr, uid_ptr; /* pointers used for making the two mode/prefix buffers */
99			char p; / pointer used making sjbuf */
100			dlink_node *m;
101			const char *servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
102			me.name : source_p->name;
103
104			if (IsClient(source_p) \|\| parc < 5)
105			return;
106
107			/* SJOIN's for local channels can't happen. */
108			if (*parv[2] != '#')
109			return;
110
111	michael	632	if (!check_channel_name(parv[2], 0))
112			{
113			sendto_realops_flags(UMODE_DEBUG, L_ALL,
114			"*** Too long or invalid channel name from %s: %s",
115			client_p->name, parv[2]);
116	adx	30	return;
117	michael	632	}
118	adx	30
119			modebuf[0] = '\0';
120			mbuf = modebuf;
121			pargs = 0;
122			newts = atol(parv[1]);
123
124			mode.mode = 0;
125			mode.limit = 0;
126			mode.key[0] = '\0';
127
128	michael	632	for (s = parv[3]; *s; ++s)
129	adx	30	{
130	michael	632	switch (*s)
131	adx	30	{
132			case 't':
133			mode.mode \|= MODE_TOPICLIMIT;
134			break;
135			case 'n':
136			mode.mode \|= MODE_NOPRIVMSGS;
137			break;
138			case 's':
139			mode.mode \|= MODE_SECRET;
140			break;
141			case 'm':
142			mode.mode \|= MODE_MODERATED;
143			break;
144			case 'i':
145			mode.mode \|= MODE_INVITEONLY;
146			break;
147			case 'p':
148			mode.mode \|= MODE_PRIVATE;
149			break;
150	michael	1167	case 'r':
151			mode.mode \|= MODE_REGISTERED;
152			break;
153	michael	1150	case 'O':
154			mode.mode \|= MODE_OPERONLY;
155			break;
156			case 'S':
157			mode.mode \|= MODE_SSLONLY;
158			break;
159	adx	30	case 'k':
160			strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
161			args++;
162	michael	632
163			if (parc < 5 + args)
164	adx	30	return;
165			break;
166			case 'l':
167			mode.limit = atoi(parv[4 + args]);
168			args++;
169	michael	632
170			if (parc < 5 + args)
171	adx	30	return;
172			break;
173			}
174			}
175
176	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
177			{
178			isnew = 1;
179			chptr = make_channel(parv[2]);
180			}
181
182	adx	30	parabuf[0] = '\0';
183	michael	632	oldts = chptr->channelts;
184	adx	30	oldmode = &chptr->mode;
185
186			if (ConfigFileEntry.ignore_bogus_ts)
187			{
188			if (newts < 800000000)
189			{
190			sendto_realops_flags(UMODE_DEBUG, L_ALL,
191			"*** Bogus TS %lu on %s ignored from %s",
192			(unsigned long)newts, chptr->chname,
193			client_p->name);
194
195			newts = (oldts == 0) ? 0 : 800000000;
196			}
197			}
198			else
199			{
200			if (!newts && !isnew && oldts)
201			{
202			sendto_channel_local(ALL_MEMBERS, NO, chptr,
203			":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
204			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
205			sendto_realops_flags(UMODE_ALL, L_ALL,
206			"Server %s changing TS on %s from %lu to 0",
207			source_p->name, chptr->chname, (unsigned long)oldts);
208			}
209			}
210
211			if (isnew)
212			chptr->channelts = tstosend = newts;
213			else if (newts == 0 \|\| oldts == 0)
214			chptr->channelts = tstosend = 0;
215			else if (newts == oldts)
216			tstosend = oldts;
217			else if (newts < oldts)
218			{
219			keep_our_modes = NO;
220			chptr->channelts = tstosend = newts;
221			}
222			else
223			{
224			keep_new_modes = NO;
225			tstosend = oldts;
226			}
227
228			if (!keep_new_modes)
229			mode = *oldmode;
230			else if (keep_our_modes)
231			{
232			mode.mode \|= oldmode->mode;
233			if (oldmode->limit > mode.limit)
234			mode.limit = oldmode->limit;
235			if (strcmp(mode.key, oldmode->key) < 0)
236			strcpy(mode.key, oldmode->key);
237			}
238			set_final_mode(&mode, oldmode);
239			chptr->mode = mode;
240
241			/* Lost the TS, other side wins, so remove modes on this side */
242			if (!keep_our_modes)
243			{
244			remove_our_modes(chptr, source_p);
245	michael	873
246	michael	1203	if (chptr->topic[0])
247	michael	873	{
248	michael	1203	set_channel_topic(chptr, "", "", 0);
249	michael	873	sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s TOPIC %s :",
250			(IsHidden(source_p) \|\|
251			ConfigServerHide.hide_servers) ?
252			me.name : source_p->name, chptr->chname);
253			}
254
255	adx	30	sendto_channel_local(ALL_MEMBERS, NO, chptr,
256			":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
257			me.name, chptr->chname, chptr->chname,
258			(unsigned long)oldts, (unsigned long)newts);
259			}
260
261			if (*modebuf != '\0')
262			{
263			/* This _SHOULD_ be to ALL_MEMBERS
264			* It contains only +imnpstlk, etc */
265			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s",
266			servername, chptr->chname, modebuf, parabuf);
267			}
268
269			if (parv[3][0] != '0' && keep_new_modes)
270			{
271			channel_modes(chptr, source_p, modebuf, parabuf);
272			}
273			else
274			{
275			modebuf[0] = '0';
276			modebuf[1] = '\0';
277			}
278
279			buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
280			source_p->name, (unsigned long)tstosend,
281			chptr->chname, modebuf, parabuf);
282			nick_ptr = nick_buf + buflen;
283
284			buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
285			ID(source_p), (unsigned long)tstosend,
286			chptr->chname, modebuf, parabuf);
287			uid_ptr = uid_buf + buflen;
288
289			/* check we can fit a nick on the end, as well as \r\n and a prefix "
290			* @%+", and a space.
291			*/
292			if (buflen >= (IRCD_BUFSIZE - IRCD_MAX(NICKLEN, IDLEN) - 2 - 3 - 1))
293			{
294			sendto_realops_flags(UMODE_ALL, L_ALL,
295			"Long SJOIN from server: %s(via %s) (ignored)",
296			source_p->name, client_p->name);
297			return;
298			}
299
300			mbuf = modebuf;
301			sendbuf[0] = '\0';
302			pargs = 0;
303
304			*mbuf++ = '+';
305
306			s = parv[args + 4];
307			while (*s == ' ')
308			s++;
309			if ((p = strchr(s, ' ')) != NULL)
310			{
311			*p++ = '\0';
312			while (*p == ' ')
313			p++;
314			have_many_nicks = *p;
315			}
316
317			while (*s)
318			{
319			int valid_mode = YES;
320			fl = 0;
321
322			do
323			{
324			switch (*s)
325			{
326			case '@':
327			fl \|= CHFL_CHANOP;
328			s++;
329			break;
330			#ifdef HALFOPS
331			case '%':
332			fl \|= CHFL_HALFOP;
333			s++;
334			break;
335			#endif
336			case '+':
337			fl \|= CHFL_VOICE;
338			s++;
339			break;
340			default:
341			valid_mode = NO;
342			break;
343			}
344			} while (valid_mode);
345
346			target_p = find_chasing(client_p, source_p, s, NULL);
347
348			/*
349			* if the client doesnt exist, or if its fake direction/server, skip.
350			* we cannot send ERR_NOSUCHNICK here because if its a UID, we cannot
351			* lookup the nick, and its better to never send the numeric than only
352			* sometimes.
353			*/
354			if (target_p == NULL \|\|
355			target_p->from != client_p \|\|
356			!IsClient(target_p))
357			{
358			goto nextnick;
359			}
360
361			len_nick = strlen(target_p->name);
362			len_uid = strlen(ID(target_p));
363
364			np = nick_prefix;
365			up = uid_prefix;
366
367			if (keep_new_modes)
368			{
369			if (fl & CHFL_CHANOP)
370			{
371			*np++ = '@';
372			*up++ = '@';
373			len_nick++;
374			len_uid++;
375			}
376			#ifdef HALFOPS
377			if (fl & CHFL_HALFOP)
378			{
379			*np++ = '%';
380			*up++ = '%';
381			len_nick++;
382			len_uid++;
383			}
384			#endif
385			if (fl & CHFL_VOICE)
386			{
387			*np++ = '+';
388			*up++ = '+';
389			len_nick++;
390			len_uid++;
391			}
392			}
393			else
394			{
395			if (fl & (CHFL_CHANOP\|CHFL_HALFOP))
396			fl = CHFL_DEOPPED;
397			else
398			fl = 0;
399			}
400			np = up = '\0';
401
402			if ((nick_ptr - nick_buf + len_nick) > (IRCD_BUFSIZE - 2))
403			{
404	michael	885	sendto_server(client_p, chptr, 0, CAP_TS6, "%s", nick_buf);
405	adx	30
406			buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
407			source_p->name, (unsigned long)tstosend,
408			chptr->chname, modebuf, parabuf);
409			nick_ptr = nick_buf + buflen;
410			}
411	michael	885
412	adx	30	nick_ptr += ircsprintf(nick_ptr, "%s%s ", nick_prefix, target_p->name);
413
414			if ((uid_ptr - uid_buf + len_uid) > (IRCD_BUFSIZE - 2))
415			{
416	michael	885	sendto_server(client_p, chptr, CAP_TS6, 0, "%s", uid_buf);
417	adx	30
418			buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
419			ID(source_p), (unsigned long)tstosend,
420			chptr->chname, modebuf, parabuf);
421			uid_ptr = uid_buf + buflen;
422			}
423
424			uid_ptr += ircsprintf(uid_ptr, "%s%s ", uid_prefix, ID(target_p));
425
426			if (!IsMember(target_p, chptr))
427			{
428			add_user_to_channel(chptr, target_p, fl, !have_many_nicks);
429			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
430			target_p->name, target_p->username,
431			target_p->host, chptr->chname);
432			}
433
434			if (fl & CHFL_CHANOP)
435			{
436			*mbuf++ = 'o';
437			para[pargs++] = target_p->name;
438
439			if (pargs >= MAXMODEPARAMS)
440			{
441			/*
442			* Ok, the code is now going to "walk" through
443			* sendbuf, filling in para strings. So, I will use sptr
444			* to point into the sendbuf.
445			* Notice, that ircsprintf() returns the number of chars
446			* successfully inserted into string.
447			* - Dianora
448			*/
449
450			sptr = sendbuf;
451			*mbuf = '\0';
452			for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
453			{
454			slen = ircsprintf(sptr, " %s", para[lcount]); /* see? */
455			sptr += slen; /* ready for next */
456			}
457			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
458			servername, chptr->chname, modebuf, sendbuf);
459			mbuf = modebuf;
460			*mbuf++ = '+';
461
462			sendbuf[0] = '\0';
463			pargs = 0;
464			}
465			}
466			#ifdef HALFOPS
467			if (fl & CHFL_HALFOP)
468			{
469			*mbuf++ = 'h';
470			para[pargs++] = target_p->name;
471
472			if (pargs >= MAXMODEPARAMS)
473			{
474			sptr = sendbuf;
475			*mbuf = '\0';
476			for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
477			{
478			slen = ircsprintf(sptr, " %s", para[lcount]);
479			sptr += slen;
480			}
481			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
482			servername, chptr->chname, modebuf, sendbuf);
483
484			mbuf = modebuf;
485			*mbuf++ = '+';
486
487			sendbuf[0] = '\0';
488			pargs = 0;
489			}
490			}
491			#endif
492			if (fl & CHFL_VOICE)
493			{
494			*mbuf++ = 'v';
495			para[pargs++] = target_p->name;
496
497			if (pargs >= MAXMODEPARAMS)
498			{
499			sptr = sendbuf;
500			*mbuf = '\0';
501			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
502			{
503			slen = ircsprintf(sptr, " %s", para[lcount]);
504			sptr += slen;
505			}
506			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
507			servername, chptr->chname, modebuf, sendbuf);
508
509			mbuf = modebuf;
510			*mbuf++ = '+';
511
512			sendbuf[0] = '\0';
513			pargs = 0;
514			}
515			}
516
517			nextnick:
518			if ((s = p) == NULL)
519			break;
520			while (*s == ' ')
521			s++;
522			if ((p = strchr(s, ' ')) != NULL)
523			{
524			*p++ = 0;
525			while (*p == ' ')
526			p++;
527			}
528			}
529
530			*mbuf = '\0';
531			*(nick_ptr - 1) = '\0';
532			*(uid_ptr - 1) = '\0';
533
534			/*
535			* checking for lcount < MAXMODEPARAMS at this time is wrong
536			* since the code has already verified above that pargs < MAXMODEPARAMS
537			* checking for para[lcount] != '\0' is also wrong, since
538			* there is no place where para[lcount] is set!
539			* - Dianora
540			*/
541
542			if (pargs != 0)
543			{
544			sptr = sendbuf;
545
546			for (lcount = 0; lcount < pargs; lcount++)
547			{
548			slen = ircsprintf(sptr, " %s", para[lcount]);
549			sptr += slen;
550			}
551
552			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
553			servername, chptr->chname, modebuf, sendbuf);
554			}
555
556			/* If this happens, its the result of a malformed SJOIN
557			* a remnant from the old persistent channel code. sigh
558			* Or it could be the result of a client just leaving
559			* and leaving us with a channel formed just as the client parts.
560			* - Dianora
561			*/
562
563			if ((dlink_list_length(&chptr->members) == 0) && isnew)
564			{
565			destroy_channel(chptr);
566			return;
567			}
568
569			if (parv[4 + args][0] == '\0')
570			return;
571
572			/* relay the SJOIN to other servers */
573			DLINK_FOREACH(m, serv_list.head)
574			{
575			target_p = m->data;
576
577			if (target_p == client_p)
578			continue;
579
580			if (IsCapable(target_p, CAP_TS6))
581			sendto_one(target_p, "%s", uid_buf);
582			else
583			sendto_one(target_p, "%s", nick_buf);
584			}
585
586			if (HasID(source_p) && !keep_our_modes)
587			{
588			if (dlink_list_length(&chptr->banlist) > 0)
589			remove_ban_list(chptr, client_p, &chptr->banlist,
590			'b', NOCAPS);
591
592			if (dlink_list_length(&chptr->exceptlist) > 0)
593			remove_ban_list(chptr, client_p, &chptr->exceptlist,
594			'e', CAP_EX);
595
596			if (dlink_list_length(&chptr->invexlist) > 0)
597			remove_ban_list(chptr, client_p, &chptr->invexlist,
598			'I', CAP_IE);
599			clear_ban_cache(chptr);
600			}
601			}
602
603			/* set_final_mode
604			*
605			* inputs - channel mode
606			* - old channel mode
607			* output - NONE
608			* side effects - walk through all the channel modes turning off modes
609			* that were on in oldmode but aren't on in mode.
610			* Then walk through turning on modes that are on in mode
611			* but were not set in oldmode.
612			*/
613			static void
614			set_final_mode(struct Mode mode, struct Mode oldmode)
615			{
616	michael	1175	const struct mode_letter *tab;
617	adx	30	char *pbuf = parabuf;
618			int len;
619
620			*mbuf++ = '-';
621
622	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
623	adx	30	{
624	michael	1175	if ((tab->mode & oldmode->mode) &&
625			!(tab->mode & mode->mode))
626			*mbuf++ = tab->letter;
627	adx	30	}
628
629			if (oldmode->limit != 0 && mode->limit == 0)
630			*mbuf++ = 'l';
631
632			if (oldmode->key[0] && !mode->key[0])
633			{
634			*mbuf++ = 'k';
635			len = ircsprintf(pbuf, "%s ", oldmode->key);
636			pbuf += len;
637			pargs++;
638			}
639
640			if (*(mbuf-1) == '-')
641			*(mbuf-1) = '+';
642			else
643			*mbuf++ = '+';
644
645	michael	1175	for (tab = chan_modes; tab->letter; ++tab)
646	adx	30	{
647	michael	1175	if ((tab->mode & mode->mode) &&
648			!(tab->mode & oldmode->mode))
649			*mbuf++ = tab->letter;
650	adx	30	}
651
652			if (mode->limit != 0 && oldmode->limit != mode->limit)
653			{
654			*mbuf++ = 'l';
655			len = ircsprintf(pbuf, "%d ", mode->limit);
656			pbuf += len;
657			pargs++;
658			}
659
660			if (mode->key[0] && strcmp(oldmode->key, mode->key))
661			{
662			*mbuf++ = 'k';
663			len = ircsprintf(pbuf, "%s ", mode->key);
664			pbuf += len;
665			pargs++;
666			}
667			if (*(mbuf-1) == '+')
668			*(mbuf-1) = '\0';
669			else
670			*mbuf = '\0';
671			}
672
673			/* remove_our_modes()
674			*
675			* inputs - pointer to channel to remove modes from
676			* - client pointer
677			* output - NONE
678			* side effects - Go through the local members, remove all their
679			* chanop modes etc., this side lost the TS.
680			*/
681			static void
682			remove_our_modes(struct Channel chptr, struct Client source_p)
683			{
684			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
685			#ifdef HALFOPS
686			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
687			#endif
688			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
689			}
690
691			/* remove_a_mode()
692			*
693			* inputs - pointer to channel
694			* - server or client removing the mode
695			* - mask o/h/v mask to be removed
696			* - flag o/h/v to be removed
697			* output - NONE
698			* side effects - remove ONE mode from all members of a channel
699			*/
700			static void
701			remove_a_mode(struct Channel chptr, struct Client source_p,
702			int mask, char flag)
703			{
704			dlink_node *ptr;
705			struct Membership *ms;
706			char lmodebuf[MODEBUFLEN];
707			char *sp=sendbuf;
708			const char *lpara[MAXMODEPARAMS];
709			int count = 0;
710			int i;
711			int l;
712
713			mbuf = lmodebuf;
714			*mbuf++ = '-';
715			*sp = '\0';
716
717			DLINK_FOREACH(ptr, chptr->members.head)
718			{
719			ms = ptr->data;
720
721			if ((ms->flags & mask) == 0)
722			continue;
723
724			ms->flags &= ~mask;
725
726			lpara[count++] = ms->client_p->name;
727
728			*mbuf++ = flag;
729
730			if (count >= MAXMODEPARAMS)
731			{
732			for(i = 0; i < MAXMODEPARAMS; i++)
733			{
734			l = ircsprintf(sp, " %s", lpara[i]);
735			sp += l;
736			}
737
738			*mbuf = '\0';
739			sendto_channel_local(ALL_MEMBERS, NO, chptr,
740			":%s MODE %s %s%s",
741			(IsHidden(source_p) \|\|
742			ConfigServerHide.hide_servers) ?
743			me.name : source_p->name,
744			chptr->chname, lmodebuf, sendbuf);
745			mbuf = lmodebuf;
746			*mbuf++ = '-';
747			count = 0;
748			sp = sendbuf;
749			*sp = '\0';
750			}
751			}
752
753			if (count != 0)
754			{
755			*mbuf = '\0';
756			for(i = 0; i < count; i++)
757			{
758			l = ircsprintf(sp, " %s", lpara[i]);
759			sp += l;
760			}
761			sendto_channel_local(ALL_MEMBERS, NO, chptr,
762			":%s MODE %s %s%s",
763			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
764			me.name : source_p->name,
765			chptr->chname, lmodebuf, sendbuf);
766			}
767			}
768
769			/* remove_ban_list()
770			*
771			* inputs - channel, source, list to remove, char of mode, caps required
772			* outputs - none
773			* side effects - given ban list is removed, modes are sent to local clients and
774			* non-ts6 servers linked through another uplink other than source_p
775			*/
776			static void
777			remove_ban_list(struct Channel chptr, struct Client source_p,
778			dlink_list *list, char c, int cap)
779			{
780			char lmodebuf[MODEBUFLEN];
781			char lparabuf[IRCD_BUFSIZE];
782			struct Ban *banptr = NULL;
783			dlink_node *ptr = NULL;
784			dlink_node *next_ptr = NULL;
785			char *pbuf = NULL;
786			int count = 0;
787			int cur_len, mlen, plen;
788
789			pbuf = lparabuf;
790
791			cur_len = mlen = ircsprintf(lmodebuf, ":%s MODE %s -",
792			source_p->name, chptr->chname);
793			mbuf = lmodebuf + mlen;
794
795			DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
796			{
797			banptr = ptr->data;
798
799			plen = banptr->len + 4; /* another +b and "!@ " */
800			if (count >= MAXMODEPARAMS \|\|
801			(cur_len + 1 /* space between */ + (plen - 1)) > IRCD_BUFSIZE - 2)
802			{
803			/* NUL-terminate and remove trailing space */
804			mbuf = (pbuf - 1) = '\0';
805			sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s",
806			lmodebuf, lparabuf);
807	michael	885	sendto_server(source_p, chptr, cap, CAP_TS6,
808	adx	30	"%s %s", lmodebuf, lparabuf);
809
810			cur_len = mlen;
811			mbuf = lmodebuf + mlen;
812			pbuf = lparabuf;
813			count = 0;
814			}
815
816			*mbuf++ = c;
817			cur_len += plen;
818			pbuf += ircsprintf(pbuf, "%s!%s@%s ", banptr->name, banptr->username,
819			banptr->host);
820			++count;
821
822			remove_ban(banptr, list);
823			}
824
825			mbuf = (pbuf - 1) = '\0';
826			sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s", lmodebuf, lparabuf);
827	michael	885	sendto_server(source_p, chptr, cap, CAP_TS6,
828	adx	30	"%s %s", lmodebuf, lparabuf);
829			}
830	michael	1230
831			static struct Message sjoin_msgtab = {
832			"SJOIN", 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
833			{m_unregistered, m_ignore, ms_sjoin, m_ignore, m_ignore, m_ignore}
834			};
835
836			static void
837			module_init(void)
838			{
839			mod_add_cmd(&sjoin_msgtab);
840			}
841
842			static void
843			module_exit(void)
844			{
845			mod_del_cmd(&sjoin_msgtab);
846			}
847
848			struct module module_entry = {
849			.node = { NULL, NULL, NULL },
850			.name = NULL,
851			.version = "$Revision$",
852			.handle = NULL,
853			.modinit = module_init,
854			.modexit = module_exit,
855			.flags = MODULE_FLAG_CORE
856			};