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   reguser *rup;
  68   regchanuser *rcup;
  69   nick *np;
  70   int i;
  71
  72   /* Get the registered channel */
  73   if ((rcp=(regchan *)cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
  74     return;
  75
  76   /*
  77    * If we're supposed to be joined, join ourselves..
  78    */
  79
  80   if (CIsJoined(rcp) && (chanservnick!=NULL)) {
  81     chanservjoinchan(cp);
  82   }
  83
  84   /* This code interacts badly with bursts.. need to fix */
  85
  86 #if 0
  87   /* We need to watch out for people sneaking into +k/i channels..
  88    * This code relies on the fact that that user will already be in
  89    * the channel at this point in time.. */
  90   if (rcp->forcemodes & (CHANMODE_KEY | CHANMODE_INVITEONLY)) {
  91     /* OK, this channel is keyed.. let's find out if the user is allowed to be here */
  92     for (i=0;i<cp->users->hashsize;i++) {
  93       if (cp->users->content[i]!=nouser && (np=getnickbynumeric(cp->users->content[i]))) {
  94         if (IsService(np))
  95           /* service (might even be us..) */
  96           continue;
  97
  98         if ((rup=getreguserfromnick(np)) && (rcup=findreguseronchannel(rcp, rup)) &&
  99             CUKnown(rcup) && !CUIsBanned(rcup))
 100           /* legit user */
 101           continue;
 102
 103         localkickuser(chanservnick, cp, np, "Private channel.");
 104       }
 105     }
 106   }
 107 #endif
 108
 109   /* Make sure the right modes are set/cleared */
 110   cs_checkchanmodes(cp);
 111
 112   /* Start the timer rolling */
 113   cs_timerfunc(cp->index);
 114
 115   /* If topicsave or forcetopic is set, update the topic */
 116   if (CIsForceTopic(rcp) || CIsTopicSave(rcp)) {
 117     localsettopic(chanservnick, cp, (rcp->topic) ? rcp->topic->content : "");
 118   }
 119 }
 120
 121 void cs_handlechanlostuser(int hooknum, void *arg) {
 122   void **args=(void **)arg;
 123   channel *cp=args[0];
 124   regchan *rcp;
 125
 126   if (!(rcp=cp->index->exts[chanservext]) || CIsSuspended(rcp) || !chanservnick ||
 127       (chanservnick==args[1]))
 128     return;
 129
 130   if (!CIsJoined(rcp))
 131     return;
 132
 133   if (cp->users->totalusers==2 &&
 134       getnumerichandlefromchanhash(cp->users, chanservnick->numeric)) {
 135     /* OK, Q is on the channel and not the one leaving.. */
 136     rcp->lastpart=time(NULL);
 137     cs_schedupdate(cp->index, 1, 5);
 138   }
 139 }
 140
 141
 142 /*
 143  * cs_handlelostchannel:
 144  *  This is for the HOOK_CHANNEL_LOSTCHANNEL message.
 145  *  A channel has just disappeared, clear our association with it.
 146  */
 147
 148 void cs_handlelostchannel(int hooknum, void *arg) {
 149   /*  channel *cp=(channel *)arg; */
 150
 151   /* Do we actually need to do anything here? */
 152 }
 153
 154 /*
 155  * cs_handlejoin:
 156  *  A user joined a channel.  See if we need to op/etc. them.
 157  *  Use this for JOIN or CREATE.
 158  */
 159
 160 void cs_handlejoin(int hooknum, void *arg) {
 161   void **arglist=(void **)arg;
 162   channel *cp=(channel *)arglist[0];
 163   nick *np=(nick *)arglist[1];
 164   regchan *rcp;
 165   reguser *rup;
 166   regchanuser *rcup=NULL;
 167   int iscreate;
 168   int dowelcome=0;
 169
 170   short modes=0;
 171
 172   /* If not registered or suspended, ignore */
 173   if (!(rcp=cp->index->exts[chanservext]) || CIsSuspended(rcp))
 174     return;
 175
 176   rcp->tripjoins++;
 177   rcp->totaljoins++;
 178   if (cp->users->totalusers > rcp->maxusers)
 179     rcp->maxusers=cp->users->totalusers;
 180   if (cp->users->totalusers > rcp->tripusers)
 181     rcp->tripusers=cp->users->totalusers;
 182
 183   /* If their auth is deleted, pretend they don't exist */
 184   rup=getreguserfromnick(np);
 185   if (rup && (rup->status & QUSTAT_DEAD))
 186     rup=NULL;
 187
 188   if (rup && (rcup=findreguseronchannel(rcp,rup)) && CUKnown(rcup) && cp->users->totalusers >= 3)
 189     rcp->lastactive=time(NULL);
 190
 191   if (rcp->lastcountersync < (time(NULL) - COUNTERSYNCINTERVAL)) {
 192     csdb_updatechannelcounters(rcp);
 193     rcp->lastcountersync=time(NULL);
 194   }
 195
 196   if (hooknum==HOOK_CHANNEL_CREATE) {
 197     iscreate=1;
 198   } else {
 199     iscreate=0;
 200   }
 201
 202   /* Check for "Q ban" */
 203   if (!IsService(np) && cs_bancheck(np,cp)) {
 204     /* They got kicked.. */
 205     return;
 206   }
 207
 208   /* Check for other ban lurking on channel which we are enforcing */
 209   if (!IsService(np) && CIsEnforce(rcp) && nickbanned(np,cp)) {
 210     localkickuser(chanservnick,cp,np,"Banned.");
 211     return;
 212   }
 213
 214   /* Check for +b chanlev flag */
 215   if (!IsService(np) && rcup && CUIsBanned(rcup)) {
 216     cs_banuser(NULL, cp->index, np, NULL);
 217     cs_timerfunc(cp->index);
 218     return;
 219   }
 220
 221   /* Check for +k chan flag */
 222   if (!IsService(np) && CIsKnownOnly(rcp) && !(rcup && CUKnown(rcup))) {
 223     if (IsInviteOnly(cp) || (IsRegOnly(cp) && !IsAccount(np))) {
 224       localkickuser(chanservnick,cp,np,"Authorised users only.");
 225     } else {
 226       cs_banuser(NULL, cp->index, np, "Authorised users only.");
 227       cs_timerfunc(cp->index);
 228     }
 229     return;
 230   }
 231
 232   if (!rup || !rcup) {
 233     /* They're not a registered user, so deop if it is a create */
 234     if (iscreate && !IsService(np)) {
 235       modes |= MC_DEOP;
 236     }
 237     if (CIsVoiceAll(rcp)) {
 238       modes |= MC_VOICE;
 239     }
 240
 241     if (CIsWelcome(rcp)) {
 242       dowelcome=1;  /* Send welcome message */
 243     } else if (!CIsJoined(rcp) && iscreate) {
 244       dowelcome=2;  /* Send a generic warning */
 245     }
 246   } else {
 247     /* Update last use time */
 248     rcup->usetime=getnettime();
 249
 250     /* DB update removed for efficiency..
 251      * csdb_updatelastjoin(rcup); */
 252
 253     /* They are registered, let's see what to do with them */
 254     if (CUIsOp(rcup) && (CIsAutoOp(rcp) || CUIsAutoOp(rcup) || CUIsProtect(rcup) || CIsProtect(rcp)) &&
 255         !CUIsDeny(rcup)) {
 256       /* Auto op */
 257       if (!iscreate) {
 258         modes |= MC_OP;
 259       }
 260     } else {
 261       /* Not auto op */
 262       if (iscreate && !CUIsOp(rcup) && !IsService(np)) {
 263         modes |= MC_DEOP;
 264       }
 265
 266       if (!CUIsQuiet(rcup) &&                                                /* Not +q */
 267           ((CUIsVoice(rcup) && (CIsAutoVoice(rcp) || CUIsAutoVoice(rcup) ||
 268                                 CIsProtect(rcp) || CUIsProtect(rcup))) ||   /* +[gp]v */
 269            (CIsVoiceAll(rcp)))) {                                 /* Or voice-all chan */
 270         modes |= MC_VOICE;
 271       }
 272     }
 273
 274     if (CIsWelcome(rcp) && !CUIsHideWelcome(rcup)) {
 275       dowelcome=1;
 276     }
 277   }
 278
 279   /* Actually do the mode change, if any */
 280   if (modes) {
 281     localsetmodes(chanservnick, cp, np, modes);
 282   }
 283
 284   switch(dowelcome) {
 285
 286   case 1: if (rcp->welcome)
 287             chanservsendmessage(np,"[%s] %s",cp->index->name->content, rcp->welcome->content);
 288           break;
 289
 290   case 2: if (chanservnick) {
 291             /* Channel x is protected by y */
 292             chanservstdmessage(np,QM_PROTECTED,cp->index->name->content,chanservnick->nick);
 293           }
 294           break;
 295   }
 296
 297   if (rup && rcup && CIsInfo(rcp) && UIsInfo(rcup->user) && !CUIsHideInfo(rcup) && chanservnick) {
 298     if (rcup->info) {
 299       /* Chan-specific info */
 300       sendmessagetochannel(chanservnick, cp, "[%s] %s",np->nick, rcup->info->content);
 301     } else if (rup->info) {
 302       /* Default info */
 303       sendmessagetochannel(chanservnick, cp, "[%s] %s",np->nick, rup->info->content);
 304     }
 305   }
 306 }
 307
 308 /* cs_handlemodechange:
 309  *  Handle mode change on channel
 310  */
 311
 312 void cs_handlemodechange(int hooknum, void *arg) {
 313   void **arglist=(void **)arg;
 314   channel *cp=(channel *)arglist[0];
 315   int changeflags=(int)arglist[2];
 316   regchan *rcp;
 317
 318   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 319     return;
 320
 321   if (changeflags & MODECHANGE_MODES)
 322     rcp->status |= QCSTAT_MODECHECK;
 323
 324   if (changeflags & MODECHANGE_USERS)
 325     rcp->status |= QCSTAT_OPCHECK;
 326
 327   if (changeflags & MODECHANGE_BANS)
 328     rcp->status |= QCSTAT_BANCHECK;
 329
 330   cs_timerfunc(rcp->index);
 331 }
 332
 333 void cs_handleburst(int hooknum, void *arg) {
 334   channel *cp=(channel *)arg;
 335   regchan *rcp;
 336
 337   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 338     return;
 339
 340   /* Check everything at some future time */
 341   /* If autolimit is on, make sure the limit gets reset at that point too */
 342   if (CIsAutoLimit(rcp)) {
 343     rcp->limit=0;
 344   }
 345   cs_schedupdate(cp->index, 1, 5);
 346   rcp->status |= (QCSTAT_OPCHECK | QCSTAT_MODECHECK | QCSTAT_BANCHECK);
 347   rcp->lastbancheck=0; /* Force re-check of all bans on channel */
 348 }
 349
 350 /* cs_handleopchange:
 351  *  Handle [+-][ov] event
 352  */
 353
 354 void cs_handleopchange(int hooknum, void *arg) {
 355   void **arglist=(void **)arg;
 356   channel *cp=(channel *)arglist[0];
 357   regchan *rcp;
 358   regchanuser *rcup;
 359   reguser *rup;
 360   nick *target=(nick *)arglist[2];
 361   short modes=0;
 362
 363   /* Check that the channel is registered and active */
 364   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 365     return;
 366
 367   rup=getreguserfromnick(target);
 368
 369   switch(hooknum) {
 370     case HOOK_CHANNEL_OPPED:
 371       if (CIsBitch(rcp) && !IsService(target)) {
 372         if (!rup || (rcup=findreguseronchannel(rcp,rup))==NULL || !CUIsOp(rcup) || CUIsDeny(rcup))
 373           modes |= MC_DEOP;
 374       }
 375       break;
 376
 377     /* Open question:
 378      *  Should +b prevent extra voices?
 379      *  If not, should we have a seperate mode that does?
 380      */
 381
 382     case HOOK_CHANNEL_DEOPPED:
 383       if (CIsProtect(rcp)) {
 384         if (rup && (rcup=findreguseronchannel(rcp,rup))!=NULL && CUIsOp(rcup) && !CUIsDeny(rcup))
 385           modes |= MC_OP;
 386       }
 387       break;
 388
 389     case HOOK_CHANNEL_DEVOICED:
 390       if (CIsProtect(rcp)) {
 391         if (rcp && (rcup=findreguseronchannel(rcp,rup))!=NULL && CUIsVoice(rcup) && !CUIsQuiet(rcup))
 392           modes |= MC_VOICE;
 393       }
 394       break;
 395   }
 396
 397   if (modes)
 398     localsetmodes(chanservnick, cp, target, modes);
 399 }
 400
 401 /* cs_handlenewban:
 402  *  Handle ban being added to channel
 403  */
 404
 405 void cs_handlenewban(int hooknum, void *arg) {
 406   void **arglist=(void **)arg;
 407   regchan *rcp;
 408   channel *cp=(channel *)arglist[0];
 409   chanban *cbp;
 410   int i;
 411   nick *np;
 412
 413   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 414     return;
 415
 416   if ((cbp=cp->bans)==NULL) {
 417     Error("chanserv",ERR_WARNING,"Told ban added but no bans on channel?");
 418     return;
 419   }
 420
 421   if (CIsEnforce(rcp)) {
 422     for (i=0;i<cp->users->hashsize;i++) {
 423       if (cp->users->content[i]!=nouser) {
 424         if ((np=getnickbynumeric(cp->users->content[i]))==NULL) {
 425           Error("chanserv",ERR_WARNING,"Found user on channel %s who doesn't exist!",cp->index->name->content);
 426           continue;
 427         }
 428         if (!IsService(np) && nickmatchban(np,cbp)) {
 429           localkickuser(chanservnick,cp,np,"Banned.");
 430         }
 431       }
 432     }
 433   }
 434 }
 435
 436 /* cs_handletopicchange:
 437  *  Handle topic change on channel
 438  */
 439
 440 void cs_handletopicchange(int hooknum, void *arg) {
 441   void **arglist=(void **)arg;
 442   channel *cp=(channel *)arglist[0];
 443   regchan *rcp;
 444
 445   if ((rcp=cp->index->exts[chanservext])==NULL || CIsSuspended(rcp))
 446     return;
 447
 448   if (CIsForceTopic(rcp)) {
 449     if (rcp->topic) {
 450       /* Forced topic: change it back */
 451       localsettopic(chanservnick, cp, rcp->topic->content);
 452     }
 453   } else if (CIsTopicSave(rcp)) {
 454     if (rcp->topic) {
 455       freesstring(rcp->topic);
 456     }
 457     if (cp->topic) {
 458       rcp->topic=getsstring(cp->topic->content,TOPICLEN);
 459     } else {
 460       rcp->topic=NULL;
 461     }
 462     csdb_updatetopic(rcp);
 463   }
 464 }