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 "tools.h"
#include "handlers.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "list.h"
#include "numeric.h"
#include "send.h"
#include "common.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "s_serv.h"
#include "s_conf.h"

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

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

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

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

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

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 '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)
    {
      set_channel_topic(chptr, NULL, NULL, 0);
      chptr->topic_time = 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 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 len;
  int i;

  *mbuf++ = '-';

  for (i = 0; flags[i].letter; i++)
  {
    if ((flags[i].mode & oldmode->mode) &&
        !(flags[i].mode & mode->mode))
      *mbuf++ = flags[i].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 (i = 0; flags[i].letter; i++)
  {
    if ((flags[i].mode & mode->mode) &&
        !(flags[i].mode & oldmode->mode))
      *mbuf++ = flags[i].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);
}
Revision:	885
Committed:	Wed Oct 31 18:09:24 2007 UTC (18 years, 11 months ago) by michael
Content type:	text/x-csrc
File size:	21163 byte(s)
Log Message:	- Removed LazyLinks in 7.2 to stop people from asking why we keep broken code for half a decade. LL will be implemented in a smarter fashion in due time
#	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			#include "tools.h"
27			#include "handlers.h"
28			#include "channel.h"
29			#include "channel_mode.h"
30			#include "client.h"
31			#include "hash.h"
32			#include "irc_string.h"
33			#include "sprintf_irc.h"
34			#include "ircd.h"
35			#include "list.h"
36			#include "numeric.h"
37			#include "send.h"
38			#include "common.h"
39			#include "msg.h"
40			#include "parse.h"
41			#include "modules.h"
42			#include "s_serv.h"
43			#include "s_conf.h"
44
45			static void ms_sjoin(struct Client , struct Client , int, char *[]);
46
47			struct Message sjoin_msgtab = {
48			"SJOIN", 0, 0, 0, 0, MFLG_SLOW, 0,
49			{m_unregistered, m_ignore, ms_sjoin, m_ignore, m_ignore, m_ignore}
50			};
51
52			#ifndef STATIC_MODULES
53			void
54			_modinit(void)
55			{
56			mod_add_cmd(&sjoin_msgtab);
57			}
58
59			void
60			_moddeinit(void)
61			{
62			mod_del_cmd(&sjoin_msgtab);
63			}
64
65	knight	31	const char *_version = "$Revision$";
66	adx	30	#endif
67
68			static char modebuf[MODEBUFLEN];
69			static char parabuf[MODEBUFLEN];
70			static char sendbuf[MODEBUFLEN];
71			static const char *para[MAXMODEPARAMS];
72			static char *mbuf;
73			static int pargs;
74
75			static void set_final_mode(struct Mode , struct Mode );
76			static void remove_our_modes(struct Channel , struct Client );
77			static void remove_a_mode(struct Channel , struct Client , int, char);
78			static void remove_ban_list(struct Channel , struct Client , dlink_list *, char, int);
79
80	michael	885
81	adx	30	/* ms_sjoin()
82			*
83			* parv[0] - sender
84			* parv[1] - TS
85			* parv[2] - channel
86			* parv[3] - modes + n arguments (key and/or limit)
87			* parv[4+n] - flags+nick list (all in one parameter)
88			*
89			* process a SJOIN, taking the TS's into account to either ignore the
90			* incoming modes or undo the existing ones or merge them, and JOIN
91			* all the specified users while sending JOIN/MODEs to local clients
92			*/
93			static void
94			ms_sjoin(struct Client client_p, struct Client source_p,
95			int parc, char *parv[])
96			{
97	michael	632	struct Channel *chptr = NULL;
98			struct Client *target_p = NULL;
99	adx	30	time_t newts;
100			time_t oldts;
101			time_t tstosend;
102	michael	632	struct Mode mode, *oldmode;
103	adx	30	int args = 0;
104			char keep_our_modes = YES;
105			char keep_new_modes = YES;
106			char have_many_nicks = NO;
107			int lcount;
108			char nick_prefix[4];
109			char uid_prefix[4];
110			char np, up;
111			int len_nick = 0;
112			int len_uid = 0;
113	michael	632	int isnew = 0;
114	adx	30	int buflen = 0;
115			int slen;
116			unsigned int fl;
117			char *s;
118			char *sptr;
119			char nick_buf[IRCD_BUFSIZE]; /* buffer for modes and prefix */
120			char uid_buf[IRCD_BUFSIZE]; /* buffer for modes/prefixes for CAP_TS6 servers */
121			char nick_ptr, uid_ptr; /* pointers used for making the two mode/prefix buffers */
122			char p; / pointer used making sjbuf */
123			dlink_node *m;
124			const char *servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
125			me.name : source_p->name;
126
127			if (IsClient(source_p) \|\| parc < 5)
128			return;
129
130			/* SJOIN's for local channels can't happen. */
131			if (*parv[2] != '#')
132			return;
133
134	michael	632	if (!check_channel_name(parv[2], 0))
135			{
136			sendto_realops_flags(UMODE_DEBUG, L_ALL,
137			"*** Too long or invalid channel name from %s: %s",
138			client_p->name, parv[2]);
139	adx	30	return;
140	michael	632	}
141	adx	30
142			modebuf[0] = '\0';
143			mbuf = modebuf;
144			pargs = 0;
145			newts = atol(parv[1]);
146
147			mode.mode = 0;
148			mode.limit = 0;
149			mode.key[0] = '\0';
150
151	michael	632	for (s = parv[3]; *s; ++s)
152	adx	30	{
153	michael	632	switch (*s)
154	adx	30	{
155			case 't':
156			mode.mode \|= MODE_TOPICLIMIT;
157			break;
158			case 'n':
159			mode.mode \|= MODE_NOPRIVMSGS;
160			break;
161			case 's':
162			mode.mode \|= MODE_SECRET;
163			break;
164			case 'm':
165			mode.mode \|= MODE_MODERATED;
166			break;
167			case 'i':
168			mode.mode \|= MODE_INVITEONLY;
169			break;
170			case 'p':
171			mode.mode \|= MODE_PRIVATE;
172			break;
173			case 'k':
174			strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
175			args++;
176	michael	632
177			if (parc < 5 + args)
178	adx	30	return;
179			break;
180			case 'l':
181			mode.limit = atoi(parv[4 + args]);
182			args++;
183	michael	632
184			if (parc < 5 + args)
185	adx	30	return;
186			break;
187			}
188			}
189
190	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
191			{
192			isnew = 1;
193			chptr = make_channel(parv[2]);
194			}
195
196	adx	30	parabuf[0] = '\0';
197	michael	632	oldts = chptr->channelts;
198	adx	30	oldmode = &chptr->mode;
199
200			if (ConfigFileEntry.ignore_bogus_ts)
201			{
202			if (newts < 800000000)
203			{
204			sendto_realops_flags(UMODE_DEBUG, L_ALL,
205			"*** Bogus TS %lu on %s ignored from %s",
206			(unsigned long)newts, chptr->chname,
207			client_p->name);
208
209			newts = (oldts == 0) ? 0 : 800000000;
210			}
211			}
212			else
213			{
214			if (!newts && !isnew && oldts)
215			{
216			sendto_channel_local(ALL_MEMBERS, NO, chptr,
217			":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
218			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
219			sendto_realops_flags(UMODE_ALL, L_ALL,
220			"Server %s changing TS on %s from %lu to 0",
221			source_p->name, chptr->chname, (unsigned long)oldts);
222			}
223			}
224
225			if (isnew)
226			chptr->channelts = tstosend = newts;
227			else if (newts == 0 \|\| oldts == 0)
228			chptr->channelts = tstosend = 0;
229			else if (newts == oldts)
230			tstosend = oldts;
231			else if (newts < oldts)
232			{
233			keep_our_modes = NO;
234			chptr->channelts = tstosend = newts;
235			}
236			else
237			{
238			keep_new_modes = NO;
239			tstosend = oldts;
240			}
241
242			if (!keep_new_modes)
243			mode = *oldmode;
244			else if (keep_our_modes)
245			{
246			mode.mode \|= oldmode->mode;
247			if (oldmode->limit > mode.limit)
248			mode.limit = oldmode->limit;
249			if (strcmp(mode.key, oldmode->key) < 0)
250			strcpy(mode.key, oldmode->key);
251			}
252			set_final_mode(&mode, oldmode);
253			chptr->mode = mode;
254
255			/* Lost the TS, other side wins, so remove modes on this side */
256			if (!keep_our_modes)
257			{
258			remove_our_modes(chptr, source_p);
259	michael	873
260			if (chptr->topic)
261			{
262			set_channel_topic(chptr, NULL, NULL, 0);
263			chptr->topic_time = 0;
264			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s TOPIC %s :",
265			(IsHidden(source_p) \|\|
266			ConfigServerHide.hide_servers) ?
267			me.name : source_p->name, chptr->chname);
268			}
269
270	adx	30	sendto_channel_local(ALL_MEMBERS, NO, chptr,
271			":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
272			me.name, chptr->chname, chptr->chname,
273			(unsigned long)oldts, (unsigned long)newts);
274			}
275
276			if (*modebuf != '\0')
277			{
278			/* This _SHOULD_ be to ALL_MEMBERS
279			* It contains only +imnpstlk, etc */
280			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s",
281			servername, chptr->chname, modebuf, parabuf);
282			}
283
284			if (parv[3][0] != '0' && keep_new_modes)
285			{
286			channel_modes(chptr, source_p, modebuf, parabuf);
287			}
288			else
289			{
290			modebuf[0] = '0';
291			modebuf[1] = '\0';
292			}
293
294			buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
295			source_p->name, (unsigned long)tstosend,
296			chptr->chname, modebuf, parabuf);
297			nick_ptr = nick_buf + buflen;
298
299			buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
300			ID(source_p), (unsigned long)tstosend,
301			chptr->chname, modebuf, parabuf);
302			uid_ptr = uid_buf + buflen;
303
304			/* check we can fit a nick on the end, as well as \r\n and a prefix "
305			* @%+", and a space.
306			*/
307			if (buflen >= (IRCD_BUFSIZE - IRCD_MAX(NICKLEN, IDLEN) - 2 - 3 - 1))
308			{
309			sendto_realops_flags(UMODE_ALL, L_ALL,
310			"Long SJOIN from server: %s(via %s) (ignored)",
311			source_p->name, client_p->name);
312			return;
313			}
314
315			mbuf = modebuf;
316			sendbuf[0] = '\0';
317			pargs = 0;
318
319			*mbuf++ = '+';
320
321			s = parv[args + 4];
322			while (*s == ' ')
323			s++;
324			if ((p = strchr(s, ' ')) != NULL)
325			{
326			*p++ = '\0';
327			while (*p == ' ')
328			p++;
329			have_many_nicks = *p;
330			}
331
332			while (*s)
333			{
334			int valid_mode = YES;
335			fl = 0;
336
337			do
338			{
339			switch (*s)
340			{
341			case '@':
342			fl \|= CHFL_CHANOP;
343			s++;
344			break;
345			#ifdef HALFOPS
346			case '%':
347			fl \|= CHFL_HALFOP;
348			s++;
349			break;
350			#endif
351			case '+':
352			fl \|= CHFL_VOICE;
353			s++;
354			break;
355			default:
356			valid_mode = NO;
357			break;
358			}
359			} while (valid_mode);
360
361			target_p = find_chasing(client_p, source_p, s, NULL);
362
363			/*
364			* if the client doesnt exist, or if its fake direction/server, skip.
365			* we cannot send ERR_NOSUCHNICK here because if its a UID, we cannot
366			* lookup the nick, and its better to never send the numeric than only
367			* sometimes.
368			*/
369			if (target_p == NULL \|\|
370			target_p->from != client_p \|\|
371			!IsClient(target_p))
372			{
373			goto nextnick;
374			}
375
376			len_nick = strlen(target_p->name);
377			len_uid = strlen(ID(target_p));
378
379			np = nick_prefix;
380			up = uid_prefix;
381
382			if (keep_new_modes)
383			{
384			if (fl & CHFL_CHANOP)
385			{
386			*np++ = '@';
387			*up++ = '@';
388			len_nick++;
389			len_uid++;
390			}
391			#ifdef HALFOPS
392			if (fl & CHFL_HALFOP)
393			{
394			*np++ = '%';
395			*up++ = '%';
396			len_nick++;
397			len_uid++;
398			}
399			#endif
400			if (fl & CHFL_VOICE)
401			{
402			*np++ = '+';
403			*up++ = '+';
404			len_nick++;
405			len_uid++;
406			}
407			}
408			else
409			{
410			if (fl & (CHFL_CHANOP\|CHFL_HALFOP))
411			fl = CHFL_DEOPPED;
412			else
413			fl = 0;
414			}
415			np = up = '\0';
416
417			if ((nick_ptr - nick_buf + len_nick) > (IRCD_BUFSIZE - 2))
418			{
419	michael	885	sendto_server(client_p, chptr, 0, CAP_TS6, "%s", nick_buf);
420	adx	30
421			buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
422			source_p->name, (unsigned long)tstosend,
423			chptr->chname, modebuf, parabuf);
424			nick_ptr = nick_buf + buflen;
425			}
426	michael	885
427	adx	30	nick_ptr += ircsprintf(nick_ptr, "%s%s ", nick_prefix, target_p->name);
428
429			if ((uid_ptr - uid_buf + len_uid) > (IRCD_BUFSIZE - 2))
430			{
431	michael	885	sendto_server(client_p, chptr, CAP_TS6, 0, "%s", uid_buf);
432	adx	30
433			buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
434			ID(source_p), (unsigned long)tstosend,
435			chptr->chname, modebuf, parabuf);
436			uid_ptr = uid_buf + buflen;
437			}
438
439			uid_ptr += ircsprintf(uid_ptr, "%s%s ", uid_prefix, ID(target_p));
440
441			if (!IsMember(target_p, chptr))
442			{
443			add_user_to_channel(chptr, target_p, fl, !have_many_nicks);
444			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
445			target_p->name, target_p->username,
446			target_p->host, chptr->chname);
447			}
448
449			if (fl & CHFL_CHANOP)
450			{
451			*mbuf++ = 'o';
452			para[pargs++] = target_p->name;
453
454			if (pargs >= MAXMODEPARAMS)
455			{
456			/*
457			* Ok, the code is now going to "walk" through
458			* sendbuf, filling in para strings. So, I will use sptr
459			* to point into the sendbuf.
460			* Notice, that ircsprintf() returns the number of chars
461			* successfully inserted into string.
462			* - Dianora
463			*/
464
465			sptr = sendbuf;
466			*mbuf = '\0';
467			for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
468			{
469			slen = ircsprintf(sptr, " %s", para[lcount]); /* see? */
470			sptr += slen; /* ready for next */
471			}
472			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
473			servername, chptr->chname, modebuf, sendbuf);
474			mbuf = modebuf;
475			*mbuf++ = '+';
476
477			sendbuf[0] = '\0';
478			pargs = 0;
479			}
480			}
481			#ifdef HALFOPS
482			if (fl & CHFL_HALFOP)
483			{
484			*mbuf++ = 'h';
485			para[pargs++] = target_p->name;
486
487			if (pargs >= MAXMODEPARAMS)
488			{
489			sptr = sendbuf;
490			*mbuf = '\0';
491			for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
492			{
493			slen = ircsprintf(sptr, " %s", para[lcount]);
494			sptr += slen;
495			}
496			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
497			servername, chptr->chname, modebuf, sendbuf);
498
499			mbuf = modebuf;
500			*mbuf++ = '+';
501
502			sendbuf[0] = '\0';
503			pargs = 0;
504			}
505			}
506			#endif
507			if (fl & CHFL_VOICE)
508			{
509			*mbuf++ = 'v';
510			para[pargs++] = target_p->name;
511
512			if (pargs >= MAXMODEPARAMS)
513			{
514			sptr = sendbuf;
515			*mbuf = '\0';
516			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
517			{
518			slen = ircsprintf(sptr, " %s", para[lcount]);
519			sptr += slen;
520			}
521			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
522			servername, chptr->chname, modebuf, sendbuf);
523
524			mbuf = modebuf;
525			*mbuf++ = '+';
526
527			sendbuf[0] = '\0';
528			pargs = 0;
529			}
530			}
531
532			nextnick:
533			if ((s = p) == NULL)
534			break;
535			while (*s == ' ')
536			s++;
537			if ((p = strchr(s, ' ')) != NULL)
538			{
539			*p++ = 0;
540			while (*p == ' ')
541			p++;
542			}
543			}
544
545			*mbuf = '\0';
546			*(nick_ptr - 1) = '\0';
547			*(uid_ptr - 1) = '\0';
548
549			/*
550			* checking for lcount < MAXMODEPARAMS at this time is wrong
551			* since the code has already verified above that pargs < MAXMODEPARAMS
552			* checking for para[lcount] != '\0' is also wrong, since
553			* there is no place where para[lcount] is set!
554			* - Dianora
555			*/
556
557			if (pargs != 0)
558			{
559			sptr = sendbuf;
560
561			for (lcount = 0; lcount < pargs; lcount++)
562			{
563			slen = ircsprintf(sptr, " %s", para[lcount]);
564			sptr += slen;
565			}
566
567			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
568			servername, chptr->chname, modebuf, sendbuf);
569			}
570
571			/* If this happens, its the result of a malformed SJOIN
572			* a remnant from the old persistent channel code. sigh
573			* Or it could be the result of a client just leaving
574			* and leaving us with a channel formed just as the client parts.
575			* - Dianora
576			*/
577
578			if ((dlink_list_length(&chptr->members) == 0) && isnew)
579			{
580			destroy_channel(chptr);
581			return;
582			}
583
584			if (parv[4 + args][0] == '\0')
585			return;
586
587			/* relay the SJOIN to other servers */
588			DLINK_FOREACH(m, serv_list.head)
589			{
590			target_p = m->data;
591
592			if (target_p == client_p)
593			continue;
594
595			if (IsCapable(target_p, CAP_TS6))
596			sendto_one(target_p, "%s", uid_buf);
597			else
598			sendto_one(target_p, "%s", nick_buf);
599			}
600
601			if (HasID(source_p) && !keep_our_modes)
602			{
603			if (dlink_list_length(&chptr->banlist) > 0)
604			remove_ban_list(chptr, client_p, &chptr->banlist,
605			'b', NOCAPS);
606
607			if (dlink_list_length(&chptr->exceptlist) > 0)
608			remove_ban_list(chptr, client_p, &chptr->exceptlist,
609			'e', CAP_EX);
610
611			if (dlink_list_length(&chptr->invexlist) > 0)
612			remove_ban_list(chptr, client_p, &chptr->invexlist,
613			'I', CAP_IE);
614			clear_ban_cache(chptr);
615			}
616			}
617
618			/* set_final_mode
619			*
620			* inputs - channel mode
621			* - old channel mode
622			* output - NONE
623			* side effects - walk through all the channel modes turning off modes
624			* that were on in oldmode but aren't on in mode.
625			* Then walk through turning on modes that are on in mode
626			* but were not set in oldmode.
627			*/
628
629			static const struct mode_letter
630			{
631			unsigned int mode;
632			unsigned char letter;
633			} flags[] = {
634			{ MODE_NOPRIVMSGS, 'n' },
635			{ MODE_TOPICLIMIT, 't' },
636			{ MODE_SECRET, 's' },
637			{ MODE_MODERATED, 'm' },
638			{ MODE_INVITEONLY, 'i' },
639			{ MODE_PRIVATE, 'p' },
640			{ 0, '\0' }
641			};
642
643			static void
644			set_final_mode(struct Mode mode, struct Mode oldmode)
645			{
646			char *pbuf = parabuf;
647			int len;
648			int i;
649
650			*mbuf++ = '-';
651
652			for (i = 0; flags[i].letter; i++)
653			{
654			if ((flags[i].mode & oldmode->mode) &&
655			!(flags[i].mode & mode->mode))
656			*mbuf++ = flags[i].letter;
657			}
658
659			if (oldmode->limit != 0 && mode->limit == 0)
660			*mbuf++ = 'l';
661
662			if (oldmode->key[0] && !mode->key[0])
663			{
664			*mbuf++ = 'k';
665			len = ircsprintf(pbuf, "%s ", oldmode->key);
666			pbuf += len;
667			pargs++;
668			}
669
670			if (*(mbuf-1) == '-')
671			*(mbuf-1) = '+';
672			else
673			*mbuf++ = '+';
674
675			for (i = 0; flags[i].letter; i++)
676			{
677			if ((flags[i].mode & mode->mode) &&
678			!(flags[i].mode & oldmode->mode))
679			*mbuf++ = flags[i].letter;
680			}
681
682			if (mode->limit != 0 && oldmode->limit != mode->limit)
683			{
684			*mbuf++ = 'l';
685			len = ircsprintf(pbuf, "%d ", mode->limit);
686			pbuf += len;
687			pargs++;
688			}
689
690			if (mode->key[0] && strcmp(oldmode->key, mode->key))
691			{
692			*mbuf++ = 'k';
693			len = ircsprintf(pbuf, "%s ", mode->key);
694			pbuf += len;
695			pargs++;
696			}
697			if (*(mbuf-1) == '+')
698			*(mbuf-1) = '\0';
699			else
700			*mbuf = '\0';
701			}
702
703			/* remove_our_modes()
704			*
705			* inputs - pointer to channel to remove modes from
706			* - client pointer
707			* output - NONE
708			* side effects - Go through the local members, remove all their
709			* chanop modes etc., this side lost the TS.
710			*/
711			static void
712			remove_our_modes(struct Channel chptr, struct Client source_p)
713			{
714			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
715			#ifdef HALFOPS
716			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
717			#endif
718			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
719			}
720
721			/* remove_a_mode()
722			*
723			* inputs - pointer to channel
724			* - server or client removing the mode
725			* - mask o/h/v mask to be removed
726			* - flag o/h/v to be removed
727			* output - NONE
728			* side effects - remove ONE mode from all members of a channel
729			*/
730			static void
731			remove_a_mode(struct Channel chptr, struct Client source_p,
732			int mask, char flag)
733			{
734			dlink_node *ptr;
735			struct Membership *ms;
736			char lmodebuf[MODEBUFLEN];
737			char *sp=sendbuf;
738			const char *lpara[MAXMODEPARAMS];
739			int count = 0;
740			int i;
741			int l;
742
743			mbuf = lmodebuf;
744			*mbuf++ = '-';
745			*sp = '\0';
746
747			DLINK_FOREACH(ptr, chptr->members.head)
748			{
749			ms = ptr->data;
750
751			if ((ms->flags & mask) == 0)
752			continue;
753
754			ms->flags &= ~mask;
755
756			lpara[count++] = ms->client_p->name;
757
758			*mbuf++ = flag;
759
760			if (count >= MAXMODEPARAMS)
761			{
762			for(i = 0; i < MAXMODEPARAMS; i++)
763			{
764			l = ircsprintf(sp, " %s", lpara[i]);
765			sp += l;
766			}
767
768			*mbuf = '\0';
769			sendto_channel_local(ALL_MEMBERS, NO, chptr,
770			":%s MODE %s %s%s",
771			(IsHidden(source_p) \|\|
772			ConfigServerHide.hide_servers) ?
773			me.name : source_p->name,
774			chptr->chname, lmodebuf, sendbuf);
775			mbuf = lmodebuf;
776			*mbuf++ = '-';
777			count = 0;
778			sp = sendbuf;
779			*sp = '\0';
780			}
781			}
782
783			if (count != 0)
784			{
785			*mbuf = '\0';
786			for(i = 0; i < count; i++)
787			{
788			l = ircsprintf(sp, " %s", lpara[i]);
789			sp += l;
790			}
791			sendto_channel_local(ALL_MEMBERS, NO, chptr,
792			":%s MODE %s %s%s",
793			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
794			me.name : source_p->name,
795			chptr->chname, lmodebuf, sendbuf);
796			}
797			}
798
799			/* remove_ban_list()
800			*
801			* inputs - channel, source, list to remove, char of mode, caps required
802			* outputs - none
803			* side effects - given ban list is removed, modes are sent to local clients and
804			* non-ts6 servers linked through another uplink other than source_p
805			*/
806			static void
807			remove_ban_list(struct Channel chptr, struct Client source_p,
808			dlink_list *list, char c, int cap)
809			{
810			char lmodebuf[MODEBUFLEN];
811			char lparabuf[IRCD_BUFSIZE];
812			struct Ban *banptr = NULL;
813			dlink_node *ptr = NULL;
814			dlink_node *next_ptr = NULL;
815			char *pbuf = NULL;
816			int count = 0;
817			int cur_len, mlen, plen;
818
819			pbuf = lparabuf;
820
821			cur_len = mlen = ircsprintf(lmodebuf, ":%s MODE %s -",
822			source_p->name, chptr->chname);
823			mbuf = lmodebuf + mlen;
824
825			DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
826			{
827			banptr = ptr->data;
828
829			plen = banptr->len + 4; /* another +b and "!@ " */
830			if (count >= MAXMODEPARAMS \|\|
831			(cur_len + 1 /* space between */ + (plen - 1)) > IRCD_BUFSIZE - 2)
832			{
833			/* NUL-terminate and remove trailing space */
834			mbuf = (pbuf - 1) = '\0';
835			sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s",
836			lmodebuf, lparabuf);
837	michael	885	sendto_server(source_p, chptr, cap, CAP_TS6,
838	adx	30	"%s %s", lmodebuf, lparabuf);
839
840			cur_len = mlen;
841			mbuf = lmodebuf + mlen;
842			pbuf = lparabuf;
843			count = 0;
844			}
845
846			*mbuf++ = c;
847			cur_len += plen;
848			pbuf += ircsprintf(pbuf, "%s!%s@%s ", banptr->name, banptr->username,
849			banptr->host);
850			++count;
851
852			remove_ban(banptr, list);
853			}
854
855			mbuf = (pbuf - 1) = '\0';
856			sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s", lmodebuf, lparabuf);
857	michael	885	sendto_server(source_p, chptr, cap, CAP_TS6,
858	adx	30	"%s %s", lmodebuf, lparabuf);
859			}