chanserv/chanservnetevents.c

   1 /*
   2  * chanservnetevents.c:
   3  *  Handles the bot reaction to network events (joins, parts, mode changes
   4  *  etc.)
   5  */
   6
   7 #include "chanserv.h"
   8
   9 #include "../channel/channel.h"
  10 #include "../nick/nick.h"
  11 #include "../localuser/localuser.h"
  12 #include "../localuser/localuserchannel.h"
  13
  14 #include <stdio.h>
  15
  16 /* cs_handlenick:
  17  *  This is for HOOK_NICK_NEWNICK and HOOK_NICK_ACCOUNT.
  18  *  Associate the nick with it's correct account.
  19  */
  20
  21 void cs_handlenick(int hooknum, void *arg) {
  22   nick *np=(nick *)arg;
  23
  24   cs_checknick(np);
  25 }
  26
  27 void cs_handlesethost(int hooknum, void *arg) {
  28   nick *np=arg;
  29
  30   cs_checknickbans(np);
  31 }
  32
  33 void cs_handlelostnick(int hooknum, void *arg) {
  34   nick *np=(nick *)arg;
  35   nicklist **nlh;
  36   nicklist *nlp;
  37   reguser *rup;
  38
  39   if ((rup=getreguserfromnick(np))) {
  40     for (nlh=&(rup->nicks);*nlh;nlh=&((*nlh)->next)) {
  41       if ((*nlh)->np==np) {
  42         nlp=*nlh;
  43         *nlh=nlp->next;
  44         freenicklist(nlp);
  45         break;
  46       }
  47     }
  48     if ((rup->status & QUSTAT_DEAD) && !rup->nicks) {
  49       freereguser(rup);
  50     }
  51   }
  52
  53   if (getactiveuserfromnick(np))
  54     freeactiveuser(getactiveuserfromnick(np));
  55 }
  56
  57 /*
  58  * cs_handlenewchannel:
  59  *  This is for the HOOK_CHANNEL_NEWCHANNEL message.
  60  *  A new channel has just been created on the network, associate
  61  *  with the registered channel (if one exists) unless it's suspended.
  62  */
  63
  64 void cs_handlenewchannel(int hooknum, void *arg) {
  65   channel *cp=(channel *)arg;
  66   regchan *rcp;
  67
  68   /* Get the registered channel */
  69   if ((rcp=(regchan *)cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
  70     return;
  71
  72   /*
  73    * If we're supposed to be joined, join ourselves..
  74    */
  75
  76   if (CIsJoined(rcp) && (chanservnick!=NULL)) {
  77     chanservjoinchan(cp);
  78   }
  79
  80   /* This code interacts badly with bursts.. need to fix */
  81
  82 #if 0
  83   /* We need to watch out for people sneaking into +k/i channels..
  84    * This code relies on the fact that that user will already be in
  85    * the channel at this point in time.. */
  86   if (rcp->forcemodes & (CHANMODE_KEY | CHANMODE_INVITEONLY)) {
  87     /* OK, this channel is keyed.. let's find out if the user is allowed to be here */
  88     for (i=0;i<cp->users->hashsize;i++) {
  89       if (cp->users->content[i]!=nouser && (np=getnickbynumeric(cp->users->content[i]))) {
  90         if (IsService(np))
  91           /* service (might even be us..) */
  92           continue;
  93
  94         if ((rup=getreguserfromnick(np)) && (rcup=findreguseronchannel(rcp, rup)) &&
  95             CUKnown(rcup) && !CUIsBanned(rcup))
  96           /* legit user */
  97           continue;
  98
  99         localkickuser(chanservnick, cp, np, "Private channel.");
 100       }
 101     }
 102   }
 103 #endif
 104
 105   /* Make sure the right modes are set/cleared */
 106   cs_checkchanmodes(cp);
 107
 108   /* Start the timer rolling */
 109   cs_timerfunc(cp->index);
 110
 111   /* If topicsave or forcetopic is set, update the topic */
 112   if (CIsForceTopic(rcp) || CIsTopicSave(rcp)) {
 113     localsettopic(chanservnick, cp, (rcp->topic) ? rcp->topic->content : "");
 114   }
 115 }
 116
 117 void cs_handlechanlostuser(int hooknum, void *arg) {
 118   void **args=(void **)arg;
 119   channel *cp=args[0];
 120   regchan *rcp;
 121
 122   if (!(rcp=cp->index->exts[chanservext]) || CIsSuspended(rcp) || !chanservnick ||
 123       (chanservnick==args[1]))
 124     return;
 125
 126   if (!CIsJoined(rcp))
 127     return;
 128
 129   if (cp->users->totalusers==2 &&
 130       getnumerichandlefromchanhash(cp->users, chanservnick->numeric)) {
 131     /* OK, Q is on the channel and not the one leaving.. */
 132     rcp->lastpart=time(NULL);
 133     cs_schedupdate(cp->index, 1, 5);
 134   }
 135 }
 136
 137
 138 /*
 139  * cs_handlelostchannel:
 140  *  This is for the HOOK_CHANNEL_LOSTCHANNEL message.
 141  *  A channel has just disappeared, clear our association with it.
 142  */
 143
 144 void cs_handlelostchannel(int hooknum, void *arg) {
 145   /*  channel *cp=(channel *)arg; */
 146
 147   /* Do we actually need to do anything here? */
 148 }
 149
 150 /*
 151  * cs_handlejoin:
 152  *  A user joined a channel.  See if we need to op/etc. them.
 153  *  Use this for JOIN or CREATE.
 154  */
 155
 156 void cs_handlejoin(int hooknum, void *arg) {
 157   void **arglist=(void **)arg;
 158   channel *cp=(channel *)arglist[0];
 159   nick *np=(nick *)arglist[1];
 160   regchan *rcp;
 161   reguser *rup;
 162   regchanuser *rcup=NULL;
 163   int iscreate;
 164   int dowelcome=0;
 165
 166   short modes=0;
 167
 168   /* If not registered or suspended, ignore */
 169   if (!(rcp=cp->index->exts[chanservext]) || CIsSuspended(rcp))
 170     return;
 171
 172   rcp->tripjoins++;
 173   rcp->totaljoins++;
 174   if (cp->users->totalusers > rcp->maxusers)
 175     rcp->maxusers=cp->users->totalusers;
 176   if (cp->users->totalusers > rcp->tripusers)
 177     rcp->tripusers=cp->users->totalusers;
 178
 179   /* If their auth is deleted, pretend they don't exist */
 180   rup=getreguserfromnick(np);
 181   if (rup && (rup->status & QUSTAT_DEAD))
 182     rup=NULL;
 183
 184   if (rup && (rcup=findreguseronchannel(rcp,rup)) && CUKnown(rcup) && cp->users->totalusers >= 3)
 185     rcp->lastactive=time(NULL);
 186
 187   if (rcp->lastcountersync < (time(NULL) - COUNTERSYNCINTERVAL)) {
 188     csdb_updatechannelcounters(rcp);
 189     rcp->lastcountersync=time(NULL);
 190   }
 191
 192   if (hooknum==HOOK_CHANNEL_CREATE) {
 193     iscreate=1;
 194   } else {
 195     iscreate=0;
 196   }
 197
 198   /* Check for "Q ban" */
 199   if (!IsService(np) && cs_bancheck(np,cp)) {
 200     /* They got kicked.. */
 201     return;
 202   }
 203
 204   /* Check for other ban lurking on channel which we are enforcing */
 205   if (!IsService(np) && CIsEnforce(rcp) && nickbanned(np,cp)) {
 206     localkickuser(chanservnick,cp,np,"Banned.");
 207     return;
 208   }
 209
 210   /* Check for +b chanlev flag */
 211   if (!IsService(np) && rcup && CUIsBanned(rcup)) {
 212     cs_banuser(NULL, cp->index, np, NULL);
 213     cs_timerfunc(cp->index);
 214     return;
 215   }
 216
 217   /* Check for +k chan flag */
 218   if (!IsService(np) && CIsKnownOnly(rcp) && !(rcup && CUKnown(rcup))) {
 219     if (IsInviteOnly(cp) || (IsRegOnly(cp) && !IsAccount(np))) {
 220       localkickuser(chanservnick,cp,np,"Authorised users only.");
 221     } else {
 222       cs_banuser(NULL, cp->index, np, "Authorised users only.");
 223       cs_timerfunc(cp->index);
 224     }
 225     return;
 226   }
 227
 228   if (!rup || !rcup) {
 229     /* They're not a registered user, so deop if it is a create */
 230     if (iscreate && !IsService(np)) {
 231       modes |= MC_DEOP;
 232     }
 233     if (CIsVoiceAll(rcp)) {
 234       modes |= MC_VOICE;
 235     }
 236
 237     if (CIsWelcome(rcp)) {
 238       dowelcome=1;  /* Send welcome message */
 239     } else if (!CIsJoined(rcp) && iscreate) {
 240       dowelcome=2;  /* Send a generic warning */
 241     }
 242   } else {
 243     /* Update last use time */
 244     rcup->usetime=getnettime();
 245
 246     /* DB update removed for efficiency..
 247      * csdb_updatelastjoin(rcup); */
 248
 249     /* They are registered, let's see what to do with them */
 250     if (CUIsOp(rcup) && (CIsAutoOp(rcp) || CUIsAutoOp(rcup) || CUIsProtect(rcup) || CIsProtect(rcp)) &&
 251         !CUIsDeny(rcup)) {
 252       /* Auto op */
 253       if (!iscreate) {
 254         modes |= MC_OP;
 255       }
 256     } else {
 257       /* Not auto op */
 258       if (iscreate && !CUIsOp(rcup) && !IsService(np)) {
 259         modes |= MC_DEOP;
 260       }
 261
 262       if (!CUIsQuiet(rcup) &&                                                /* Not +q */
 263           ((CUIsVoice(rcup) && (CIsAutoVoice(rcp) || CUIsAutoVoice(rcup) ||
 264                                 CIsProtect(rcp) || CUIsProtect(rcup))) ||   /* +[gp]v */
 265            (CIsVoiceAll(rcp)))) {                                 /* Or voice-all chan */
 266         modes |= MC_VOICE;
 267       }
 268     }
 269
 270     if (CIsWelcome(rcp) && !CUIsHideWelcome(rcup)) {
 271       dowelcome=1;
 272     }
 273   }
 274
 275   /* Actually do the mode change, if any */
 276   if (modes) {
 277     localsetmodes(chanservnick, cp, np, modes);
 278   }
 279
 280   switch(dowelcome) {
 281
 282   case 1: if (rcp->welcome)
 283             chanservsendmessage(np,"[%s] %s",cp->index->name->content, rcp->welcome->content);
 284           break;
 285
 286   case 2: if (chanservnick) {
 287             /* Channel x is protected by y */
 288             chanservstdmessage(np,QM_PROTECTED,cp->index->name->content,chanservnick->nick);
 289           }
 290           break;
 291   }
 292
 293   if (rup && rcup && CIsInfo(rcp) && UIsInfo(rcup->user) && !CUIsHideInfo(rcup) && chanservnick) {
 294     if (rcup->info) {
 295       /* Chan-specific info */
 296       sendmessagetochannel(chanservnick, cp, "[%s] %s",np->nick, rcup->info->content);
 297     } else if (rup->info) {
 298       /* Default info */
 299       sendmessagetochannel(chanservnick, cp, "[%s] %s",np->nick, rup->info->content);
 300     }
 301   }
 302 }
 303
 304 /* cs_handlemodechange:
 305  *  Handle mode change on channel
 306  */
 307
 308 void cs_handlemodechange(int hooknum, void *arg) {
 309   void **arglist=(void **)arg;
 310   channel *cp=(channel *)arglist[0];
 311   int changeflags=(int)arglist[2];
 312   regchan *rcp;
 313
 314   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 315     return;
 316
 317   if (changeflags & MODECHANGE_MODES)
 318     rcp->status |= QCSTAT_MODECHECK;
 319
 320   if (changeflags & MODECHANGE_USERS)
 321     rcp->status |= QCSTAT_OPCHECK;
 322
 323   if (changeflags & MODECHANGE_BANS)
 324     rcp->status |= QCSTAT_BANCHECK;
 325
 326   cs_timerfunc(rcp->index);
 327 }
 328
 329 void cs_handleburst(int hooknum, void *arg) {
 330   channel *cp=(channel *)arg;
 331   regchan *rcp;
 332
 333   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 334     return;
 335
 336   /* Check everything at some future time */
 337   /* If autolimit is on, make sure the limit gets reset at that point too */
 338   if (CIsAutoLimit(rcp)) {
 339     rcp->limit=0;
 340   }
 341   cs_schedupdate(cp->index, 1, 5);
 342   rcp->status |= (QCSTAT_OPCHECK | QCSTAT_MODECHECK | QCSTAT_BANCHECK);
 343   rcp->lastbancheck=0; /* Force re-check of all bans on channel */
 344 }
 345
 346 /* cs_handleopchange:
 347  *  Handle [+-][ov] event
 348  */
 349
 350 void cs_handleopchange(int hooknum, void *arg) {
 351   void **arglist=(void **)arg;
 352   channel *cp=(channel *)arglist[0];
 353   regchan *rcp;
 354   regchanuser *rcup;
 355   reguser *rup;
 356   nick *target=(nick *)arglist[2];
 357   short modes=0;
 358
 359   /* Check that the channel is registered and active */
 360   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 361     return;
 362
 363   rup=getreguserfromnick(target);
 364
 365   switch(hooknum) {
 366     case HOOK_CHANNEL_OPPED:
 367       if (CIsBitch(rcp) && !IsService(target)) {
 368         if (!rup || (rcup=findreguseronchannel(rcp,rup))==NULL || !CUIsOp(rcup) || CUIsDeny(rcup))
 369           modes |= MC_DEOP;
 370       }
 371       break;
 372
 373     /* Open question:
 374      *  Should +b prevent extra voices?
 375      *  If not, should we have a seperate mode that does?
 376      */
 377
 378     case HOOK_CHANNEL_DEOPPED:
 379       if (CIsProtect(rcp)) {
 380         if (rup && (rcup=findreguseronchannel(rcp,rup))!=NULL && CUIsOp(rcup) && !CUIsDeny(rcup))
 381           modes |= MC_OP;
 382       }
 383       break;
 384
 385     case HOOK_CHANNEL_DEVOICED:
 386       if (CIsProtect(rcp)) {
 387         if (rcp && (rcup=findreguseronchannel(rcp,rup))!=NULL && CUIsVoice(rcup) && !CUIsQuiet(rcup))
 388           modes |= MC_VOICE;
 389       }
 390       break;
 391   }
 392
 393   if (modes)
 394     localsetmodes(chanservnick, cp, target, modes);
 395 }
 396
 397 /* cs_handlenewban:
 398  *  Handle ban being added to channel
 399  */
 400
 401 void cs_handlenewban(int hooknum, void *arg) {
 402   void **arglist=(void **)arg;
 403   regchan *rcp;
 404   channel *cp=(channel *)arglist[0];
 405   chanban *cbp;
 406   int i;
 407   nick *np;
 408
 409   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 410     return;
 411
 412   if ((cbp=cp->bans)==NULL) {
 413     Error("chanserv",ERR_WARNING,"Told ban added but no bans on channel?");
 414     return;
 415   }
 416
 417   if (CIsEnforce(rcp)) {
 418     for (i=0;i<cp->users->hashsize;i++) {
 419       if (cp->users->content[i]!=nouser) {
 420         if ((np=getnickbynumeric(cp->users->content[i]))==NULL) {
 421           Error("chanserv",ERR_WARNING,"Found user on channel %s who doesn't exist!",cp->index->name->content);
 422           continue;
 423         }
 424         if (!IsService(np) && nickmatchban(np,cbp)) {
 425           localkickuser(chanservnick,cp,np,"Banned.");
 426         }
 427       }
 428     }
 429   }
 430 }
 431
 432 /* cs_handletopicchange:
 433  *  Handle topic change on channel
 434  */
 435
 436 void cs_handletopicchange(int hooknum, void *arg) {
 437   void **arglist=(void **)arg;
 438   channel *cp=(channel *)arglist[0];
 439   regchan *rcp;
 440
 441   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 442     return;
 443
 444   if (CIsForceTopic(rcp)) {
 445     if (rcp->topic) {
 446       /* Forced topic: change it back */
 447       localsettopic(chanservnick, cp, rcp->topic->content);
 448     }
 449   } else if (CIsTopicSave(rcp)) {
 450     if (rcp->topic) {
 451       freesstring(rcp->topic);
 452     }
 453     if (cp->topic) {
 454       rcp->topic=getsstring(cp->topic->content,TOPICLEN);
 455     } else {
 456       rcp->topic=NULL;
 457     }
 458     csdb_updatetopic(rcp);
 459   }
 460 }