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 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}
};

void
_modinit(void)
{
  mod_add_cmd(&sjoin_msgtab);
}

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

const char *_version = "$Revision$";

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:	1121
Committed:	Sun Jan 9 11:03:03 2011 UTC (14 years, 7 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.3/modules/core/m_sjoin.c*
File size:	21114 byte(s)
Log Message:	- removed all instances of STATIC_MODULES since we don't have static modules anymore - removed m_mkpasswd module from contrib
#	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			static void ms_sjoin(struct Client , struct Client , int, char *[]);
45
46			struct Message sjoin_msgtab = {
47			"SJOIN", 0, 0, 0, 0, MFLG_SLOW, 0,
48			{m_unregistered, m_ignore, ms_sjoin, m_ignore, m_ignore, m_ignore}
49			};
50
51			void
52			_modinit(void)
53			{
54			mod_add_cmd(&sjoin_msgtab);
55			}
56
57			void
58			_moddeinit(void)
59			{
60			mod_del_cmd(&sjoin_msgtab);
61			}
62
63	knight	31	const char *_version = "$Revision$";
64	adx	30
65			static char modebuf[MODEBUFLEN];
66			static char parabuf[MODEBUFLEN];
67			static char sendbuf[MODEBUFLEN];
68			static const char *para[MAXMODEPARAMS];
69			static char *mbuf;
70			static int pargs;
71
72			static void set_final_mode(struct Mode , struct Mode );
73			static void remove_our_modes(struct Channel , struct Client );
74			static void remove_a_mode(struct Channel , struct Client , int, char);
75			static void remove_ban_list(struct Channel , struct Client , dlink_list *, char, int);
76
77	michael	885
78	adx	30	/* ms_sjoin()
79			*
80			* parv[0] - sender
81			* parv[1] - TS
82			* parv[2] - channel
83			* parv[3] - modes + n arguments (key and/or limit)
84			* parv[4+n] - flags+nick list (all in one parameter)
85			*
86			* process a SJOIN, taking the TS's into account to either ignore the
87			* incoming modes or undo the existing ones or merge them, and JOIN
88			* all the specified users while sending JOIN/MODEs to local clients
89			*/
90			static void
91			ms_sjoin(struct Client client_p, struct Client source_p,
92			int parc, char *parv[])
93			{
94	michael	632	struct Channel *chptr = NULL;
95			struct Client *target_p = NULL;
96	adx	30	time_t newts;
97			time_t oldts;
98			time_t tstosend;
99	michael	632	struct Mode mode, *oldmode;
100	adx	30	int args = 0;
101			char keep_our_modes = YES;
102			char keep_new_modes = YES;
103			char have_many_nicks = NO;
104			int lcount;
105			char nick_prefix[4];
106			char uid_prefix[4];
107			char np, up;
108			int len_nick = 0;
109			int len_uid = 0;
110	michael	632	int isnew = 0;
111	adx	30	int buflen = 0;
112			int slen;
113			unsigned int fl;
114			char *s;
115			char *sptr;
116			char nick_buf[IRCD_BUFSIZE]; /* buffer for modes and prefix */
117			char uid_buf[IRCD_BUFSIZE]; /* buffer for modes/prefixes for CAP_TS6 servers */
118			char nick_ptr, uid_ptr; /* pointers used for making the two mode/prefix buffers */
119			char p; / pointer used making sjbuf */
120			dlink_node *m;
121			const char *servername = (ConfigServerHide.hide_servers \|\| IsHidden(source_p)) ?
122			me.name : source_p->name;
123
124			if (IsClient(source_p) \|\| parc < 5)
125			return;
126
127			/* SJOIN's for local channels can't happen. */
128			if (*parv[2] != '#')
129			return;
130
131	michael	632	if (!check_channel_name(parv[2], 0))
132			{
133			sendto_realops_flags(UMODE_DEBUG, L_ALL,
134			"*** Too long or invalid channel name from %s: %s",
135			client_p->name, parv[2]);
136	adx	30	return;
137	michael	632	}
138	adx	30
139			modebuf[0] = '\0';
140			mbuf = modebuf;
141			pargs = 0;
142			newts = atol(parv[1]);
143
144			mode.mode = 0;
145			mode.limit = 0;
146			mode.key[0] = '\0';
147
148	michael	632	for (s = parv[3]; *s; ++s)
149	adx	30	{
150	michael	632	switch (*s)
151	adx	30	{
152			case 't':
153			mode.mode \|= MODE_TOPICLIMIT;
154			break;
155			case 'n':
156			mode.mode \|= MODE_NOPRIVMSGS;
157			break;
158			case 's':
159			mode.mode \|= MODE_SECRET;
160			break;
161			case 'm':
162			mode.mode \|= MODE_MODERATED;
163			break;
164			case 'i':
165			mode.mode \|= MODE_INVITEONLY;
166			break;
167			case 'p':
168			mode.mode \|= MODE_PRIVATE;
169			break;
170			case 'k':
171			strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
172			args++;
173	michael	632
174			if (parc < 5 + args)
175	adx	30	return;
176			break;
177			case 'l':
178			mode.limit = atoi(parv[4 + args]);
179			args++;
180	michael	632
181			if (parc < 5 + args)
182	adx	30	return;
183			break;
184			}
185			}
186
187	michael	632	if ((chptr = hash_find_channel(parv[2])) == NULL)
188			{
189			isnew = 1;
190			chptr = make_channel(parv[2]);
191			}
192
193	adx	30	parabuf[0] = '\0';
194	michael	632	oldts = chptr->channelts;
195	adx	30	oldmode = &chptr->mode;
196
197			if (ConfigFileEntry.ignore_bogus_ts)
198			{
199			if (newts < 800000000)
200			{
201			sendto_realops_flags(UMODE_DEBUG, L_ALL,
202			"*** Bogus TS %lu on %s ignored from %s",
203			(unsigned long)newts, chptr->chname,
204			client_p->name);
205
206			newts = (oldts == 0) ? 0 : 800000000;
207			}
208			}
209			else
210			{
211			if (!newts && !isnew && oldts)
212			{
213			sendto_channel_local(ALL_MEMBERS, NO, chptr,
214			":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to 0",
215			me.name, chptr->chname, chptr->chname, (unsigned long)oldts);
216			sendto_realops_flags(UMODE_ALL, L_ALL,
217			"Server %s changing TS on %s from %lu to 0",
218			source_p->name, chptr->chname, (unsigned long)oldts);
219			}
220			}
221
222			if (isnew)
223			chptr->channelts = tstosend = newts;
224			else if (newts == 0 \|\| oldts == 0)
225			chptr->channelts = tstosend = 0;
226			else if (newts == oldts)
227			tstosend = oldts;
228			else if (newts < oldts)
229			{
230			keep_our_modes = NO;
231			chptr->channelts = tstosend = newts;
232			}
233			else
234			{
235			keep_new_modes = NO;
236			tstosend = oldts;
237			}
238
239			if (!keep_new_modes)
240			mode = *oldmode;
241			else if (keep_our_modes)
242			{
243			mode.mode \|= oldmode->mode;
244			if (oldmode->limit > mode.limit)
245			mode.limit = oldmode->limit;
246			if (strcmp(mode.key, oldmode->key) < 0)
247			strcpy(mode.key, oldmode->key);
248			}
249			set_final_mode(&mode, oldmode);
250			chptr->mode = mode;
251
252			/* Lost the TS, other side wins, so remove modes on this side */
253			if (!keep_our_modes)
254			{
255			remove_our_modes(chptr, source_p);
256	michael	873
257			if (chptr->topic)
258			{
259			set_channel_topic(chptr, NULL, NULL, 0);
260			chptr->topic_time = 0;
261			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s TOPIC %s :",
262			(IsHidden(source_p) \|\|
263			ConfigServerHide.hide_servers) ?
264			me.name : source_p->name, chptr->chname);
265			}
266
267	adx	30	sendto_channel_local(ALL_MEMBERS, NO, chptr,
268			":%s NOTICE %s :*** Notice -- TS for %s changed from %lu to %lu",
269			me.name, chptr->chname, chptr->chname,
270			(unsigned long)oldts, (unsigned long)newts);
271			}
272
273			if (*modebuf != '\0')
274			{
275			/* This _SHOULD_ be to ALL_MEMBERS
276			* It contains only +imnpstlk, etc */
277			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s",
278			servername, chptr->chname, modebuf, parabuf);
279			}
280
281			if (parv[3][0] != '0' && keep_new_modes)
282			{
283			channel_modes(chptr, source_p, modebuf, parabuf);
284			}
285			else
286			{
287			modebuf[0] = '0';
288			modebuf[1] = '\0';
289			}
290
291			buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
292			source_p->name, (unsigned long)tstosend,
293			chptr->chname, modebuf, parabuf);
294			nick_ptr = nick_buf + buflen;
295
296			buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
297			ID(source_p), (unsigned long)tstosend,
298			chptr->chname, modebuf, parabuf);
299			uid_ptr = uid_buf + buflen;
300
301			/* check we can fit a nick on the end, as well as \r\n and a prefix "
302			* @%+", and a space.
303			*/
304			if (buflen >= (IRCD_BUFSIZE - IRCD_MAX(NICKLEN, IDLEN) - 2 - 3 - 1))
305			{
306			sendto_realops_flags(UMODE_ALL, L_ALL,
307			"Long SJOIN from server: %s(via %s) (ignored)",
308			source_p->name, client_p->name);
309			return;
310			}
311
312			mbuf = modebuf;
313			sendbuf[0] = '\0';
314			pargs = 0;
315
316			*mbuf++ = '+';
317
318			s = parv[args + 4];
319			while (*s == ' ')
320			s++;
321			if ((p = strchr(s, ' ')) != NULL)
322			{
323			*p++ = '\0';
324			while (*p == ' ')
325			p++;
326			have_many_nicks = *p;
327			}
328
329			while (*s)
330			{
331			int valid_mode = YES;
332			fl = 0;
333
334			do
335			{
336			switch (*s)
337			{
338			case '@':
339			fl \|= CHFL_CHANOP;
340			s++;
341			break;
342			#ifdef HALFOPS
343			case '%':
344			fl \|= CHFL_HALFOP;
345			s++;
346			break;
347			#endif
348			case '+':
349			fl \|= CHFL_VOICE;
350			s++;
351			break;
352			default:
353			valid_mode = NO;
354			break;
355			}
356			} while (valid_mode);
357
358			target_p = find_chasing(client_p, source_p, s, NULL);
359
360			/*
361			* if the client doesnt exist, or if its fake direction/server, skip.
362			* we cannot send ERR_NOSUCHNICK here because if its a UID, we cannot
363			* lookup the nick, and its better to never send the numeric than only
364			* sometimes.
365			*/
366			if (target_p == NULL \|\|
367			target_p->from != client_p \|\|
368			!IsClient(target_p))
369			{
370			goto nextnick;
371			}
372
373			len_nick = strlen(target_p->name);
374			len_uid = strlen(ID(target_p));
375
376			np = nick_prefix;
377			up = uid_prefix;
378
379			if (keep_new_modes)
380			{
381			if (fl & CHFL_CHANOP)
382			{
383			*np++ = '@';
384			*up++ = '@';
385			len_nick++;
386			len_uid++;
387			}
388			#ifdef HALFOPS
389			if (fl & CHFL_HALFOP)
390			{
391			*np++ = '%';
392			*up++ = '%';
393			len_nick++;
394			len_uid++;
395			}
396			#endif
397			if (fl & CHFL_VOICE)
398			{
399			*np++ = '+';
400			*up++ = '+';
401			len_nick++;
402			len_uid++;
403			}
404			}
405			else
406			{
407			if (fl & (CHFL_CHANOP\|CHFL_HALFOP))
408			fl = CHFL_DEOPPED;
409			else
410			fl = 0;
411			}
412			np = up = '\0';
413
414			if ((nick_ptr - nick_buf + len_nick) > (IRCD_BUFSIZE - 2))
415			{
416	michael	885	sendto_server(client_p, chptr, 0, CAP_TS6, "%s", nick_buf);
417	adx	30
418			buflen = ircsprintf(nick_buf, ":%s SJOIN %lu %s %s %s:",
419			source_p->name, (unsigned long)tstosend,
420			chptr->chname, modebuf, parabuf);
421			nick_ptr = nick_buf + buflen;
422			}
423	michael	885
424	adx	30	nick_ptr += ircsprintf(nick_ptr, "%s%s ", nick_prefix, target_p->name);
425
426			if ((uid_ptr - uid_buf + len_uid) > (IRCD_BUFSIZE - 2))
427			{
428	michael	885	sendto_server(client_p, chptr, CAP_TS6, 0, "%s", uid_buf);
429	adx	30
430			buflen = ircsprintf(uid_buf, ":%s SJOIN %lu %s %s %s:",
431			ID(source_p), (unsigned long)tstosend,
432			chptr->chname, modebuf, parabuf);
433			uid_ptr = uid_buf + buflen;
434			}
435
436			uid_ptr += ircsprintf(uid_ptr, "%s%s ", uid_prefix, ID(target_p));
437
438			if (!IsMember(target_p, chptr))
439			{
440			add_user_to_channel(chptr, target_p, fl, !have_many_nicks);
441			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN :%s",
442			target_p->name, target_p->username,
443			target_p->host, chptr->chname);
444			}
445
446			if (fl & CHFL_CHANOP)
447			{
448			*mbuf++ = 'o';
449			para[pargs++] = target_p->name;
450
451			if (pargs >= MAXMODEPARAMS)
452			{
453			/*
454			* Ok, the code is now going to "walk" through
455			* sendbuf, filling in para strings. So, I will use sptr
456			* to point into the sendbuf.
457			* Notice, that ircsprintf() returns the number of chars
458			* successfully inserted into string.
459			* - Dianora
460			*/
461
462			sptr = sendbuf;
463			*mbuf = '\0';
464			for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
465			{
466			slen = ircsprintf(sptr, " %s", para[lcount]); /* see? */
467			sptr += slen; /* ready for next */
468			}
469			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
470			servername, chptr->chname, modebuf, sendbuf);
471			mbuf = modebuf;
472			*mbuf++ = '+';
473
474			sendbuf[0] = '\0';
475			pargs = 0;
476			}
477			}
478			#ifdef HALFOPS
479			if (fl & CHFL_HALFOP)
480			{
481			*mbuf++ = 'h';
482			para[pargs++] = target_p->name;
483
484			if (pargs >= MAXMODEPARAMS)
485			{
486			sptr = sendbuf;
487			*mbuf = '\0';
488			for(lcount = 0; lcount < MAXMODEPARAMS; lcount++)
489			{
490			slen = ircsprintf(sptr, " %s", para[lcount]);
491			sptr += slen;
492			}
493			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
494			servername, chptr->chname, modebuf, sendbuf);
495
496			mbuf = modebuf;
497			*mbuf++ = '+';
498
499			sendbuf[0] = '\0';
500			pargs = 0;
501			}
502			}
503			#endif
504			if (fl & CHFL_VOICE)
505			{
506			*mbuf++ = 'v';
507			para[pargs++] = target_p->name;
508
509			if (pargs >= MAXMODEPARAMS)
510			{
511			sptr = sendbuf;
512			*mbuf = '\0';
513			for (lcount = 0; lcount < MAXMODEPARAMS; lcount++)
514			{
515			slen = ircsprintf(sptr, " %s", para[lcount]);
516			sptr += slen;
517			}
518			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
519			servername, chptr->chname, modebuf, sendbuf);
520
521			mbuf = modebuf;
522			*mbuf++ = '+';
523
524			sendbuf[0] = '\0';
525			pargs = 0;
526			}
527			}
528
529			nextnick:
530			if ((s = p) == NULL)
531			break;
532			while (*s == ' ')
533			s++;
534			if ((p = strchr(s, ' ')) != NULL)
535			{
536			*p++ = 0;
537			while (*p == ' ')
538			p++;
539			}
540			}
541
542			*mbuf = '\0';
543			*(nick_ptr - 1) = '\0';
544			*(uid_ptr - 1) = '\0';
545
546			/*
547			* checking for lcount < MAXMODEPARAMS at this time is wrong
548			* since the code has already verified above that pargs < MAXMODEPARAMS
549			* checking for para[lcount] != '\0' is also wrong, since
550			* there is no place where para[lcount] is set!
551			* - Dianora
552			*/
553
554			if (pargs != 0)
555			{
556			sptr = sendbuf;
557
558			for (lcount = 0; lcount < pargs; lcount++)
559			{
560			slen = ircsprintf(sptr, " %s", para[lcount]);
561			sptr += slen;
562			}
563
564			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s%s",
565			servername, chptr->chname, modebuf, sendbuf);
566			}
567
568			/* If this happens, its the result of a malformed SJOIN
569			* a remnant from the old persistent channel code. sigh
570			* Or it could be the result of a client just leaving
571			* and leaving us with a channel formed just as the client parts.
572			* - Dianora
573			*/
574
575			if ((dlink_list_length(&chptr->members) == 0) && isnew)
576			{
577			destroy_channel(chptr);
578			return;
579			}
580
581			if (parv[4 + args][0] == '\0')
582			return;
583
584			/* relay the SJOIN to other servers */
585			DLINK_FOREACH(m, serv_list.head)
586			{
587			target_p = m->data;
588
589			if (target_p == client_p)
590			continue;
591
592			if (IsCapable(target_p, CAP_TS6))
593			sendto_one(target_p, "%s", uid_buf);
594			else
595			sendto_one(target_p, "%s", nick_buf);
596			}
597
598			if (HasID(source_p) && !keep_our_modes)
599			{
600			if (dlink_list_length(&chptr->banlist) > 0)
601			remove_ban_list(chptr, client_p, &chptr->banlist,
602			'b', NOCAPS);
603
604			if (dlink_list_length(&chptr->exceptlist) > 0)
605			remove_ban_list(chptr, client_p, &chptr->exceptlist,
606			'e', CAP_EX);
607
608			if (dlink_list_length(&chptr->invexlist) > 0)
609			remove_ban_list(chptr, client_p, &chptr->invexlist,
610			'I', CAP_IE);
611			clear_ban_cache(chptr);
612			}
613			}
614
615			/* set_final_mode
616			*
617			* inputs - channel mode
618			* - old channel mode
619			* output - NONE
620			* side effects - walk through all the channel modes turning off modes
621			* that were on in oldmode but aren't on in mode.
622			* Then walk through turning on modes that are on in mode
623			* but were not set in oldmode.
624			*/
625
626			static const struct mode_letter
627			{
628			unsigned int mode;
629			unsigned char letter;
630			} flags[] = {
631			{ MODE_NOPRIVMSGS, 'n' },
632			{ MODE_TOPICLIMIT, 't' },
633			{ MODE_SECRET, 's' },
634			{ MODE_MODERATED, 'm' },
635			{ MODE_INVITEONLY, 'i' },
636			{ MODE_PRIVATE, 'p' },
637			{ 0, '\0' }
638			};
639
640			static void
641			set_final_mode(struct Mode mode, struct Mode oldmode)
642			{
643			char *pbuf = parabuf;
644			int len;
645			int i;
646
647			*mbuf++ = '-';
648
649			for (i = 0; flags[i].letter; i++)
650			{
651			if ((flags[i].mode & oldmode->mode) &&
652			!(flags[i].mode & mode->mode))
653			*mbuf++ = flags[i].letter;
654			}
655
656			if (oldmode->limit != 0 && mode->limit == 0)
657			*mbuf++ = 'l';
658
659			if (oldmode->key[0] && !mode->key[0])
660			{
661			*mbuf++ = 'k';
662			len = ircsprintf(pbuf, "%s ", oldmode->key);
663			pbuf += len;
664			pargs++;
665			}
666
667			if (*(mbuf-1) == '-')
668			*(mbuf-1) = '+';
669			else
670			*mbuf++ = '+';
671
672			for (i = 0; flags[i].letter; i++)
673			{
674			if ((flags[i].mode & mode->mode) &&
675			!(flags[i].mode & oldmode->mode))
676			*mbuf++ = flags[i].letter;
677			}
678
679			if (mode->limit != 0 && oldmode->limit != mode->limit)
680			{
681			*mbuf++ = 'l';
682			len = ircsprintf(pbuf, "%d ", mode->limit);
683			pbuf += len;
684			pargs++;
685			}
686
687			if (mode->key[0] && strcmp(oldmode->key, mode->key))
688			{
689			*mbuf++ = 'k';
690			len = ircsprintf(pbuf, "%s ", mode->key);
691			pbuf += len;
692			pargs++;
693			}
694			if (*(mbuf-1) == '+')
695			*(mbuf-1) = '\0';
696			else
697			*mbuf = '\0';
698			}
699
700			/* remove_our_modes()
701			*
702			* inputs - pointer to channel to remove modes from
703			* - client pointer
704			* output - NONE
705			* side effects - Go through the local members, remove all their
706			* chanop modes etc., this side lost the TS.
707			*/
708			static void
709			remove_our_modes(struct Channel chptr, struct Client source_p)
710			{
711			remove_a_mode(chptr, source_p, CHFL_CHANOP, 'o');
712			#ifdef HALFOPS
713			remove_a_mode(chptr, source_p, CHFL_HALFOP, 'h');
714			#endif
715			remove_a_mode(chptr, source_p, CHFL_VOICE, 'v');
716			}
717
718			/* remove_a_mode()
719			*
720			* inputs - pointer to channel
721			* - server or client removing the mode
722			* - mask o/h/v mask to be removed
723			* - flag o/h/v to be removed
724			* output - NONE
725			* side effects - remove ONE mode from all members of a channel
726			*/
727			static void
728			remove_a_mode(struct Channel chptr, struct Client source_p,
729			int mask, char flag)
730			{
731			dlink_node *ptr;
732			struct Membership *ms;
733			char lmodebuf[MODEBUFLEN];
734			char *sp=sendbuf;
735			const char *lpara[MAXMODEPARAMS];
736			int count = 0;
737			int i;
738			int l;
739
740			mbuf = lmodebuf;
741			*mbuf++ = '-';
742			*sp = '\0';
743
744			DLINK_FOREACH(ptr, chptr->members.head)
745			{
746			ms = ptr->data;
747
748			if ((ms->flags & mask) == 0)
749			continue;
750
751			ms->flags &= ~mask;
752
753			lpara[count++] = ms->client_p->name;
754
755			*mbuf++ = flag;
756
757			if (count >= MAXMODEPARAMS)
758			{
759			for(i = 0; i < MAXMODEPARAMS; i++)
760			{
761			l = ircsprintf(sp, " %s", lpara[i]);
762			sp += l;
763			}
764
765			*mbuf = '\0';
766			sendto_channel_local(ALL_MEMBERS, NO, chptr,
767			":%s MODE %s %s%s",
768			(IsHidden(source_p) \|\|
769			ConfigServerHide.hide_servers) ?
770			me.name : source_p->name,
771			chptr->chname, lmodebuf, sendbuf);
772			mbuf = lmodebuf;
773			*mbuf++ = '-';
774			count = 0;
775			sp = sendbuf;
776			*sp = '\0';
777			}
778			}
779
780			if (count != 0)
781			{
782			*mbuf = '\0';
783			for(i = 0; i < count; i++)
784			{
785			l = ircsprintf(sp, " %s", lpara[i]);
786			sp += l;
787			}
788			sendto_channel_local(ALL_MEMBERS, NO, chptr,
789			":%s MODE %s %s%s",
790			(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ?
791			me.name : source_p->name,
792			chptr->chname, lmodebuf, sendbuf);
793			}
794			}
795
796			/* remove_ban_list()
797			*
798			* inputs - channel, source, list to remove, char of mode, caps required
799			* outputs - none
800			* side effects - given ban list is removed, modes are sent to local clients and
801			* non-ts6 servers linked through another uplink other than source_p
802			*/
803			static void
804			remove_ban_list(struct Channel chptr, struct Client source_p,
805			dlink_list *list, char c, int cap)
806			{
807			char lmodebuf[MODEBUFLEN];
808			char lparabuf[IRCD_BUFSIZE];
809			struct Ban *banptr = NULL;
810			dlink_node *ptr = NULL;
811			dlink_node *next_ptr = NULL;
812			char *pbuf = NULL;
813			int count = 0;
814			int cur_len, mlen, plen;
815
816			pbuf = lparabuf;
817
818			cur_len = mlen = ircsprintf(lmodebuf, ":%s MODE %s -",
819			source_p->name, chptr->chname);
820			mbuf = lmodebuf + mlen;
821
822			DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
823			{
824			banptr = ptr->data;
825
826			plen = banptr->len + 4; /* another +b and "!@ " */
827			if (count >= MAXMODEPARAMS \|\|
828			(cur_len + 1 /* space between */ + (plen - 1)) > IRCD_BUFSIZE - 2)
829			{
830			/* NUL-terminate and remove trailing space */
831			mbuf = (pbuf - 1) = '\0';
832			sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s",
833			lmodebuf, lparabuf);
834	michael	885	sendto_server(source_p, chptr, cap, CAP_TS6,
835	adx	30	"%s %s", lmodebuf, lparabuf);
836
837			cur_len = mlen;
838			mbuf = lmodebuf + mlen;
839			pbuf = lparabuf;
840			count = 0;
841			}
842
843			*mbuf++ = c;
844			cur_len += plen;
845			pbuf += ircsprintf(pbuf, "%s!%s@%s ", banptr->name, banptr->username,
846			banptr->host);
847			++count;
848
849			remove_ban(banptr, list);
850			}
851
852			mbuf = (pbuf - 1) = '\0';
853			sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s", lmodebuf, lparabuf);
854	michael	885	sendto_server(source_p, chptr, cap, CAP_TS6,
855	adx	30	"%s %s", lmodebuf, lparabuf);
856			}