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  */
  25
  26 #include "stdinc.h"
  27 #include "channel.h"
  28 #include "client.h"
  29 #include "hash.h"
  30 #include "match.h"
  31 #include "ircd.h"
  32 #include "numeric.h"
  33 #include "s_user.h"
  34 #include "s_conf.h"
  35 #include "s_serv.h"
  36 #include "logger.h"
  37 #include "send.h"
  38 #include "msg.h"
  39 #include "parse.h"
  40 #include "modules.h"
  41 #include "packet.h"
  42 #include "s_newconf.h"
  43
  44 struct module_modes ModuleModes;
  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_mlock(struct Client *, struct Client *, int, const char **);
  50 static int ms_bmask(struct Client *, struct Client *, int, const char **);
  51
  52 struct Message mode_msgtab = {
  53         "MODE", 0, 0, 0, MFLG_SLOW,
  54         {mg_unreg, {m_mode, 2}, {m_mode, 3}, {ms_mode, 3}, mg_ignore, {m_mode, 2}}
  55 };
  56 struct Message tmode_msgtab = {
  57         "TMODE", 0, 0, 0, MFLG_SLOW,
  58         {mg_ignore, mg_ignore, {ms_tmode, 4}, {ms_tmode, 4}, mg_ignore, mg_ignore}
  59 };
  60 struct Message mlock_msgtab = {
  61         "MLOCK", 0, 0, 0, MFLG_SLOW,
  62         {mg_ignore, mg_ignore, {ms_mlock, 4}, {ms_mlock, 4}, mg_ignore, mg_ignore}
  63 };
  64 struct Message bmask_msgtab = {
  65         "BMASK", 0, 0, 0, MFLG_SLOW,
  66         {mg_ignore, mg_ignore, mg_ignore, {ms_bmask, 5}, mg_ignore, mg_ignore}
  67 };
  68
  69 mapi_clist_av1 mode_clist[] = { &mode_msgtab, &tmode_msgtab, &mlock_msgtab, &bmask_msgtab, NULL };
  70
  71 DECLARE_MODULE_AV1(mode, NULL, NULL, mode_clist, NULL, NULL, "$Revision: 1006 $");
  72
  73 /*
  74  * m_mode - MODE command handler
  75  * parv[1] - channel
  76  */
  77 static int
  78 m_mode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  79 {
  80         struct Channel *chptr = NULL;
  81         struct membership *msptr;
  82         int n = 2;
  83         const char *dest;
  84         int operspy = 0;
  85
  86         dest = parv[1];
  87
  88         if(IsOperSpy(source_p) && *dest == '!')
  89         {
  90                 dest++;
  91                 operspy = 1;
  92
  93                 if(EmptyString(dest))
  94                 {
  95                         sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
  96                                    me.name, source_p->name, "MODE");
  97                         return 0;
  98                 }
  99         }
 100
 101         /* Now, try to find the channel in question */
 102         if(!IsChanPrefix(*dest))
 103         {
 104                 /* if here, it has to be a non-channel name */
 105                 user_mode(client_p, source_p, parc, parv);
 106                 return 0;
 107         }
 108
 109         if(!check_channel_name(dest))
 110         {
 111                 sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), parv[1]);
 112                 return 0;
 113         }
 114
 115         chptr = find_channel(dest);
 116
 117         if(chptr == NULL)
 118         {
 119                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 120                                    form_str(ERR_NOSUCHCHANNEL), parv[1]);
 121                 return 0;
 122         }
 123
 124         /* Now know the channel exists */
 125         if(parc < n + 1)
 126         {
 127                 if(operspy)
 128                         report_operspy(source_p, "MODE", chptr->chname);
 129
 130                 sendto_one(source_p, form_str(RPL_CHANNELMODEIS),
 131                            me.name, source_p->name, parv[1],
 132                            operspy ? channel_modes(chptr, &me) : channel_modes(chptr, source_p));
 133
 134                 sendto_one(source_p, form_str(RPL_CREATIONTIME),
 135                            me.name, source_p->name, parv[1], chptr->channelts);
 136         }
 137         else
 138         {
 139                 msptr = find_channel_membership(chptr, source_p);
 140
 141                 /* Finish the flood grace period... */
 142                 if(MyClient(source_p) && !IsFloodDone(source_p))
 143                 {
 144                         if(!((parc == 3) && (parv[2][0] == 'b') && (parv[2][1] == '\0')))
 145                                 flood_endgrace(source_p);
 146                 }
 147
 148                 set_channel_mode(client_p, source_p, chptr, msptr, parc - n, parv + n);
 149         }
 150
 151         return 0;
 152 }
 153
 154 static int
 155 ms_mode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 156 {
 157         struct Channel *chptr;
 158
 159         chptr = find_channel(parv[1]);
 160
 161         if(chptr == NULL)
 162         {
 163                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 164                                    form_str(ERR_NOSUCHCHANNEL), parv[1]);
 165                 return 0;
 166         }
 167
 168         set_channel_mode(client_p, source_p, chptr, NULL, parc - 2, parv + 2);
 169
 170         return 0;
 171 }
 172
 173 static int
 174 ms_tmode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 175 {
 176         struct Channel *chptr = NULL;
 177         struct membership *msptr;
 178
 179         /* Now, try to find the channel in question */
 180         if(!IsChanPrefix(parv[2][0]) || !check_channel_name(parv[2]))
 181         {
 182                 sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), parv[2]);
 183                 return 0;
 184         }
 185
 186         chptr = find_channel(parv[2]);
 187
 188         if(chptr == NULL)
 189         {
 190                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 191                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
 192                 return 0;
 193         }
 194
 195         /* TS is higher, drop it. */
 196         if(atol(parv[1]) > chptr->channelts)
 197                 return 0;
 198
 199         if(IsServer(source_p))
 200         {
 201                 set_channel_mode(client_p, source_p, chptr, NULL, parc - 3, parv + 3);
 202         }
 203         else
 204         {
 205                 msptr = find_channel_membership(chptr, source_p);
 206
 207                 set_channel_mode(client_p, source_p, chptr, msptr, parc - 3, parv + 3);
 208         }
 209
 210         return 0;
 211 }
 212
 213 static int
 214 ms_mlock(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 215 {
 216         struct Channel *chptr = NULL;
 217
 218         /* Now, try to find the channel in question */
 219         if(!IsChanPrefix(parv[2][0]) || !check_channel_name(parv[2]))
 220         {
 221                 sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), parv[2]);
 222                 return 0;
 223         }
 224
 225         chptr = find_channel(parv[2]);
 226
 227         if(chptr == NULL)
 228         {
 229                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 230                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
 231                 return 0;
 232         }
 233
 234         /* TS is higher, drop it. */
 235         if(atol(parv[1]) > chptr->channelts)
 236                 return 0;
 237
 238         if(IsServer(source_p))
 239                 set_channel_mlock(client_p, source_p, chptr, parv[3]);
 240
 241         return 0;
 242 }
 243
 244 static int
 245 ms_bmask(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 246 {
 247         static char modebuf[BUFSIZE];
 248         static char parabuf[BUFSIZE];
 249         struct Channel *chptr;
 250         rb_dlink_list *banlist;
 251         const char *s;
 252         char *t;
 253         char *mbuf;
 254         char *pbuf;
 255         long mode_type;
 256         int mlen;
 257         int plen = 0;
 258         int tlen;
 259         int arglen;
 260         int modecount = 0;
 261         int needcap = NOCAPS;
 262         int mems;
 263         struct Client *fakesource_p;
 264
 265         if(!IsChanPrefix(parv[2][0]) || !check_channel_name(parv[2]))
 266                 return 0;
 267
 268         if((chptr = find_channel(parv[2])) == NULL)
 269                 return 0;
 270
 271         /* TS is higher, drop it. */
 272         if(atol(parv[1]) > chptr->channelts)
 273                 return 0;
 274
 275         switch (parv[3][0])
 276         {
 277         case 'b':
 278                 banlist = &chptr->banlist;
 279                 mode_type = CHFL_BAN;
 280                 mems = ALL_MEMBERS;
 281                 break;
 282
 283         case 'e':
 284                 banlist = &chptr->exceptlist;
 285                 mode_type = CHFL_EXCEPTION;
 286                 needcap = CAP_EX;
 287                 mems = ONLY_CHANOPS;
 288                 break;
 289
 290         case 'I':
 291                 banlist = &chptr->invexlist;
 292                 mode_type = CHFL_INVEX;
 293                 needcap = CAP_IE;
 294                 mems = ONLY_CHANOPS;
 295                 break;
 296
 297         case 'q':
 298                 banlist = &chptr->quietlist;
 299                 mode_type = ModuleModes.CHFL_QUIET;
 300                 mems = ALL_MEMBERS;
 301                 break;
 302
 303                 /* maybe we should just blindly propagate this? */
 304         default:
 305                 return 0;
 306         }
 307
 308         parabuf[0] = '\0';
 309         s = LOCAL_COPY(parv[4]);
 310
 311         /* Hide connecting server on netburst -- jilles */
 312         if (ConfigServerHide.flatten_links && !HasSentEob(source_p))
 313                 fakesource_p = &me;
 314         else
 315                 fakesource_p = source_p;
 316         mlen = rb_sprintf(modebuf, ":%s MODE %s +", fakesource_p->name, chptr->chname);
 317         mbuf = modebuf + mlen;
 318         pbuf = parabuf;
 319
 320         while(*s == ' ')
 321                 s++;
 322
 323         /* next char isnt a space, point t to the next one */
 324         if((t = strchr(s, ' ')) != NULL)
 325         {
 326                 *t++ = '\0';
 327
 328                 /* double spaces will break the parser */
 329                 while(*t == ' ')
 330                         t++;
 331         }
 332
 333         /* couldve skipped spaces and got nothing.. */
 334         while(!EmptyString(s))
 335         {
 336                 /* ban with a leading ':' -- this will break the protocol */
 337                 if(*s == ':')
 338                         goto nextban;
 339
 340                 tlen = strlen(s);
 341
 342                 /* I dont even want to begin parsing this.. */
 343                 if(tlen > MODEBUFLEN)
 344                         break;
 345
 346                 if(add_id(fakesource_p, chptr, s, banlist, mode_type))
 347                 {
 348                         /* this new one wont fit.. */
 349                         if(mlen + MAXMODEPARAMS + plen + tlen > BUFSIZE - 5 ||
 350                            modecount >= MAXMODEPARAMS)
 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,
 356                                               "%s %s", modebuf, parabuf);
 357
 358                                 mbuf = modebuf + mlen;
 359                                 pbuf = parabuf;
 360                                 plen = modecount = 0;
 361                         }
 362
 363                         *mbuf++ = parv[3][0];
 364                         arglen = rb_sprintf(pbuf, "%s ", s);
 365                         pbuf += arglen;
 366                         plen += arglen;
 367                         modecount++;
 368                 }
 369
 370               nextban:
 371                 s = t;
 372
 373                 if(s != NULL)
 374                 {
 375                         if((t = strchr(s, ' ')) != NULL)
 376                         {
 377                                 *t++ = '\0';
 378
 379                                 while(*t == ' ')
 380                                         t++;
 381                         }
 382                 }
 383         }
 384
 385         if(modecount)
 386         {
 387                 *mbuf = '\0';
 388                 *(pbuf - 1) = '\0';
 389                 sendto_channel_local(mems, chptr, "%s %s", modebuf, parabuf);
 390                 sendto_server(client_p, chptr, needcap, CAP_TS6, "%s %s", modebuf, parabuf);
 391         }
 392
 393         sendto_server(client_p, chptr, CAP_TS6 | needcap, NOCAPS, ":%s BMASK %ld %s %s :%s",
 394                       source_p->id, (long) chptr->channelts, chptr->chname, parv[3], parv[4]);
 395         return 0;
 396 }
 397