modules/core/m_mode.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_mode.c: Sets a user or channel mode.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  *
  24  *  $Id: m_mode.c 1006 2006-03-09 15:32:14Z nenolod $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "channel.h"
  29 #include "client.h"
  30 #include "hash.h"
  31 #include "irc_string.h"
  32 #include "ircd.h"
  33 #include "numeric.h"
  34 #include "s_user.h"
  35 #include "s_conf.h"
  36 #include "s_serv.h"
  37 #include "s_log.h"
  38 #include "send.h"
  39 #include "msg.h"
  40 #include "parse.h"
  41 #include "modules.h"
  42 #include "packet.h"
  43 #include "sprintf_irc.h"
  44 #include "s_newconf.h"
  45
  46 static int m_mode(struct Client *, struct Client *, int, const char **);
  47 static int ms_mode(struct Client *, struct Client *, int, const char **);
  48 static int ms_tmode(struct Client *, struct Client *, int, const char **);
  49 static int ms_bmask(struct Client *, struct Client *, int, const char **);
  50
  51 struct Message mode_msgtab = {
  52         "MODE", 0, 0, 0, MFLG_SLOW,
  53         {mg_unreg, {m_mode, 2}, {m_mode, 3}, {ms_mode, 3}, mg_ignore, {m_mode, 2}}
  54 };
  55 struct Message tmode_msgtab = {
  56         "TMODE", 0, 0, 0, MFLG_SLOW,
  57         {mg_ignore, mg_ignore, {ms_tmode, 4}, {ms_tmode, 4}, mg_ignore, mg_ignore}
  58 };
  59 struct Message bmask_msgtab = {
  60         "BMASK", 0, 0, 0, MFLG_SLOW,
  61         {mg_ignore, mg_ignore, mg_ignore, {ms_bmask, 5}, mg_ignore, mg_ignore}
  62 };
  63
  64 mapi_clist_av1 mode_clist[] = { &mode_msgtab, &tmode_msgtab, &bmask_msgtab, NULL };
  65
  66 DECLARE_MODULE_AV1(mode, NULL, NULL, mode_clist, NULL, NULL, "$Revision: 1006 $");
  67
  68 /*
  69  * m_mode - MODE command handler
  70  * parv[0] - sender
  71  * parv[1] - channel
  72  */
  73 static int
  74 m_mode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  75 {
  76         struct Channel *chptr = NULL;
  77         struct membership *msptr;
  78         int n = 2;
  79         const char *dest;
  80         int operspy = 0;
  81
  82         dest = parv[1];
  83
  84         if(IsOperSpy(source_p) && *dest == '!')
  85         {
  86                 dest++;
  87                 operspy = 1;
  88
  89                 if(EmptyString(dest))
  90                 {
  91                         sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
  92                                    me.name, source_p->name, "MODE");
  93                         return 0;
  94                 }
  95         }
  96
  97         /* Now, try to find the channel in question */
  98         if(!IsChanPrefix(*dest))
  99         {
 100                 /* if here, it has to be a non-channel name */
 101                 user_mode(client_p, source_p, parc, parv);
 102                 return 0;
 103         }
 104
 105         if(!check_channel_name(dest))
 106         {
 107                 sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), parv[1]);
 108                 return 0;
 109         }
 110
 111         chptr = find_channel(dest);
 112
 113         if(chptr == NULL)
 114         {
 115                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 116                                    form_str(ERR_NOSUCHCHANNEL), parv[1]);
 117                 return 0;
 118         }
 119
 120         /* Now know the channel exists */
 121         if(parc < n + 1)
 122         {
 123                 if(operspy)
 124                         report_operspy(source_p, "MODE", chptr->chname);
 125
 126                 sendto_one(source_p, form_str(RPL_CHANNELMODEIS),
 127                            me.name, source_p->name, parv[1],
 128                            operspy ? channel_modes(chptr, &me) : channel_modes(chptr, source_p));
 129
 130                 sendto_one(source_p, form_str(RPL_CREATIONTIME),
 131                            me.name, source_p->name, parv[1], chptr->channelts);
 132         }
 133         else
 134         {
 135                 msptr = find_channel_membership(chptr, source_p);
 136
 137                 /* Finish the flood grace period... */
 138                 if(MyClient(source_p) && !IsFloodDone(source_p))
 139                 {
 140                         if(!((parc == 3) && (parv[2][0] == 'b') && (parv[2][1] == '\0')))
 141                                 flood_endgrace(source_p);
 142                 }
 143
 144                 set_channel_mode(client_p, source_p, chptr, msptr, parc - n, parv + n);
 145         }
 146
 147         return 0;
 148 }
 149
 150 static int
 151 ms_mode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 152 {
 153         struct Channel *chptr;
 154
 155         chptr = find_channel(parv[1]);
 156
 157         if(chptr == NULL)
 158         {
 159                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 160                                    form_str(ERR_NOSUCHCHANNEL), parv[1]);
 161                 return 0;
 162         }
 163
 164         set_channel_mode(client_p, source_p, chptr, NULL, parc - 2, parv + 2);
 165
 166         return 0;
 167 }
 168
 169 static int
 170 ms_tmode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 171 {
 172         struct Channel *chptr = NULL;
 173         struct membership *msptr;
 174
 175         /* Now, try to find the channel in question */
 176         if(!IsChanPrefix(parv[2][0]) || !check_channel_name(parv[2]))
 177         {
 178                 sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), parv[2]);
 179                 return 0;
 180         }
 181
 182         chptr = find_channel(parv[2]);
 183
 184         if(chptr == NULL)
 185         {
 186                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 187                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
 188                 return 0;
 189         }
 190
 191         /* TS is higher, drop it. */
 192         if(atol(parv[1]) > chptr->channelts)
 193                 return 0;
 194
 195         if(IsServer(source_p))
 196         {
 197                 set_channel_mode(client_p, source_p, chptr, NULL, parc - 3, parv + 3);
 198         }
 199         else
 200         {
 201                 msptr = find_channel_membership(chptr, source_p);
 202
 203                 set_channel_mode(client_p, source_p, chptr, msptr, parc - 3, parv + 3);
 204         }
 205
 206         return 0;
 207 }
 208
 209 static int
 210 ms_bmask(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 211 {
 212         static char modebuf[BUFSIZE];
 213         static char parabuf[BUFSIZE];
 214         struct Channel *chptr;
 215         rb_dlink_list *banlist;
 216         const char *s;
 217         char *t;
 218         char *mbuf;
 219         char *pbuf;
 220         long mode_type;
 221         int mlen;
 222         int plen = 0;
 223         int tlen;
 224         int arglen;
 225         int modecount = 0;
 226         int needcap = NOCAPS;
 227         int mems;
 228         struct Client *fakesource_p;
 229
 230         if(!IsChanPrefix(parv[2][0]) || !check_channel_name(parv[2]))
 231                 return 0;
 232
 233         if((chptr = find_channel(parv[2])) == NULL)
 234                 return 0;
 235
 236         /* TS is higher, drop it. */
 237         if(atol(parv[1]) > chptr->channelts)
 238                 return 0;
 239
 240         switch (parv[3][0])
 241         {
 242         case 'b':
 243                 banlist = &chptr->banlist;
 244                 mode_type = CHFL_BAN;
 245                 mems = ALL_MEMBERS;
 246                 break;
 247
 248         case 'e':
 249                 banlist = &chptr->exceptlist;
 250                 mode_type = CHFL_EXCEPTION;
 251                 needcap = CAP_EX;
 252                 mems = ONLY_CHANOPS;
 253                 break;
 254
 255         case 'I':
 256                 banlist = &chptr->invexlist;
 257                 mode_type = CHFL_INVEX;
 258                 needcap = CAP_IE;
 259                 mems = ONLY_CHANOPS;
 260                 break;
 261
 262         case 'q':
 263                 banlist = &chptr->quietlist;
 264                 mode_type = CHFL_QUIET;
 265                 mems = ALL_MEMBERS;
 266                 break;
 267
 268                 /* maybe we should just blindly propagate this? */
 269         default:
 270                 return 0;
 271         }
 272
 273         parabuf[0] = '\0';
 274         s = LOCAL_COPY(parv[4]);
 275
 276         /* Hide connecting server on netburst -- jilles */
 277         if (ConfigServerHide.flatten_links && !HasSentEob(source_p))
 278                 fakesource_p = &me;
 279         else
 280                 fakesource_p = source_p;
 281         mlen = rb_sprintf(modebuf, ":%s MODE %s +", fakesource_p->name, chptr->chname);
 282         mbuf = modebuf + mlen;
 283         pbuf = parabuf;
 284
 285         while(*s == ' ')
 286                 s++;
 287
 288         /* next char isnt a space, point t to the next one */
 289         if((t = strchr(s, ' ')) != NULL)
 290         {
 291                 *t++ = '\0';
 292
 293                 /* double spaces will break the parser */
 294                 while(*t == ' ')
 295                         t++;
 296         }
 297
 298         /* couldve skipped spaces and got nothing.. */
 299         while(!EmptyString(s))
 300         {
 301                 /* ban with a leading ':' -- this will break the protocol */
 302                 if(*s == ':')
 303                         goto nextban;
 304
 305                 tlen = strlen(s);
 306
 307                 /* I dont even want to begin parsing this.. */
 308                 if(tlen > MODEBUFLEN)
 309                         break;
 310
 311                 if(add_id(fakesource_p, chptr, s, banlist, mode_type))
 312                 {
 313                         /* this new one wont fit.. */
 314                         if(mlen + MAXMODEPARAMS + plen + tlen > BUFSIZE - 5 ||
 315                            modecount >= MAXMODEPARAMS)
 316                         {
 317                                 *mbuf = '\0';
 318                                 *(pbuf - 1) = '\0';
 319                                 sendto_channel_local(mems, chptr, "%s %s", modebuf, parabuf);
 320                                 sendto_server(client_p, chptr, needcap, CAP_TS6,
 321                                               "%s %s", modebuf, parabuf);
 322
 323                                 mbuf = modebuf + mlen;
 324                                 pbuf = parabuf;
 325                                 plen = modecount = 0;
 326                         }
 327
 328                         *mbuf++ = parv[3][0];
 329                         arglen = rb_sprintf(pbuf, "%s ", s);
 330                         pbuf += arglen;
 331                         plen += arglen;
 332                         modecount++;
 333                 }
 334
 335               nextban:
 336                 s = t;
 337
 338                 if(s != NULL)
 339                 {
 340                         if((t = strchr(s, ' ')) != NULL)
 341                         {
 342                                 *t++ = '\0';
 343
 344                                 while(*t == ' ')
 345                                         t++;
 346                         }
 347                 }
 348         }
 349
 350         if(modecount)
 351         {
 352                 *mbuf = '\0';
 353                 *(pbuf - 1) = '\0';
 354                 sendto_channel_local(mems, chptr, "%s %s", modebuf, parabuf);
 355                 sendto_server(client_p, chptr, needcap, CAP_TS6, "%s %s", modebuf, parabuf);
 356         }
 357
 358         sendto_server(client_p, chptr, CAP_TS6 | needcap, NOCAPS, ":%s BMASK %ld %s %s :%s",
 359                       source_p->id, (long) chptr->channelts, chptr->chname, parv[3], parv[4]);
 360         return 0;
 361 }
 362