localuser/localuser.c

   1 /* localuser.c */
   2
   3 #include "../nick/nick.h"
   4 #include "../lib/base64.h"
   5 #include "../lib/sstring.h"
   6 #include "../irc/irc.h"
   7 #include "../irc/irc_config.h"
   8 #include "../core/hooks.h"
   9 #include "../core/error.h"
  10 #include "../lib/version.h"
  11 #include "localuser.h"
  12
  13 #include <string.h>
  14 #include <stdarg.h>
  15 #include <stdio.h>
  16 #include <inttypes.h>
  17
  18 MODULE_VERSION("");
  19
  20 int currentlocalunum;
  21 UserMessageHandler umhandlers[MAXLOCALUSER+1];
  22
  23 typedef struct pendingkill {
  24   nick *source, *target;
  25   sstring *reason;
  26   struct pendingkill *next;
  27 } pendingkill;
  28
  29 pendingkill *pendingkilllist;
  30
  31 void checklocalkill(int hooknum, void *nick);
  32 void clearpendingkills(int hooknum, void *arg);
  33 void checkpendingkills(int hooknum, void *arg);
  34 void _killuser(nick *source, nick *target, char *reason);
  35
  36 void _init() {
  37   int i;
  38
  39   for (i=0;i<=MAXLOCALUSER;i++) {
  40     umhandlers[i]=NULL;
  41   }
  42   currentlocalunum=1;
  43   pendingkilllist=NULL;
  44   registerhook(HOOK_IRC_SENDBURSTNICKS,&sendnickburst);
  45   registerhook(HOOK_NICK_KILL,&checklocalkill);
  46   registerhook(HOOK_NICK_LOSTNICK,&checkpendingkills); /* CHECK ME -> should this hook KILL or LOSTNICK or BOTH */
  47   registerhook(HOOK_CORE_ENDOFHOOKSQUEUE,&clearpendingkills);
  48   registerserverhandler("P",&handleprivatemsgcmd,2);
  49   registerserverhandler("O",&handleprivatenoticecmd, 2);
  50 }
  51
  52 void _fini() {
  53   pendingkill *pk;
  54
  55   for (pk=pendingkilllist;pk;pk=pendingkilllist) {
  56     pendingkilllist = pk->next;
  57     freesstring(pk->reason);
  58     free(pk);
  59   }
  60
  61   deregisterhook(HOOK_IRC_SENDBURSTNICKS,&sendnickburst);
  62   deregisterhook(HOOK_NICK_KILL,&checklocalkill);
  63   deregisterhook(HOOK_NICK_LOSTNICK,&checkpendingkills); /* CHECK ME -> should this hook KILL or LOSTNICK or BOTH */
  64   deregisterhook(HOOK_CORE_ENDOFHOOKSQUEUE,&clearpendingkills);
  65
  66   deregisterserverhandler("P",&handleprivatemsgcmd);
  67   deregisterserverhandler("O",&handleprivatenoticecmd);
  68 }
  69
  70 /*
  71  * registerlocaluserflags:
  72  *  This function creates a local user, and broadcasts it's existence to the net (if connected).
  73  */
  74
  75 nick *registerlocaluserflags(char *nickname, char *ident, char *host, char *realname, char *authname, unsigned long authid, flag_t accountflags, flag_t umodes, UserMessageHandler handler) {
  76   int i;
  77   nick *newuser,*np;
  78   struct irc_in_addr ipaddress;
  79
  80   i=0;
  81   currentlocalunum=(currentlocalunum+1)%262142;
  82   while (servernicks[numerictolong(mynumeric->content,2)][currentlocalunum&MAXLOCALUSER]!=NULL) {
  83     /* Numeric 262143 on our server is used for "nouser" by the channels module, so cannot be allocated */
  84     currentlocalunum=(currentlocalunum+1)%262142;
  85     if (++i>MAXLOCALUSER) {
  86       return NULL;
  87     }
  88   }
  89
  90   /* This code is very similar to stuff in nick.c... */
  91   newuser=newnick();
  92   newuser->numeric=(numerictolong(mynumeric->content,2)<<18)|(currentlocalunum);
  93   strncpy(newuser->nick,nickname,NICKLEN);
  94   newuser->nick[NICKLEN]='\0';
  95   strncpy(newuser->ident,ident,USERLEN);
  96   newuser->ident[USERLEN]='\0';
  97   newuser->host=findorcreatehost(host);
  98   newuser->realname=findorcreaterealname(realname);
  99   newuser->nextbyhost=newuser->host->nicks;
 100   newuser->host->nicks=newuser;
 101   newuser->nextbyrealname=newuser->realname->nicks;
 102   newuser->realname->nicks=newuser;
 103   newuser->umodes=umodes;
 104
 105   memset(&ipaddress, 0, sizeof(ipaddress));
 106   ((unsigned short *)(ipaddress.in6_16))[5] = 65535;
 107   ((unsigned short *)(ipaddress.in6_16))[6] = 127;
 108   ((unsigned char *)(ipaddress.in6_16))[14] = 1;
 109   ((unsigned char *)(ipaddress.in6_16))[15] = (currentlocalunum%253)+1;
 110
 111   newuser->ipnode = refnode(iptree, &ipaddress, PATRICIA_MAXBITS);
 112   node_increment_usercount(newuser->ipnode);
 113
 114   newuser->timestamp=getnettime();
 115   newuser->shident=NULL;
 116   newuser->sethost=NULL;
 117   newuser->away=NULL;
 118   newuser->marker=0;
 119   memset(newuser->exts, 0, MAXNICKEXTS * sizeof(void *));
 120
 121   if (IsOper(newuser)) {
 122     newuser->opername = getsstring("-", ACCOUNTLEN);
 123   } else {
 124     newuser->opername = NULL;
 125   }
 126
 127   newuser->accountts=0;
 128   newuser->auth=NULL;
 129   newuser->authname=NULLAUTHNAME;
 130   if (IsAccount(newuser)) {
 131     newuser->accountts=newuser->timestamp;
 132     if (authid) {
 133       newuser->auth=findorcreateauthname(authid, authname);
 134       newuser->authname=newuser->auth->name;
 135       newuser->auth->usercount++;
 136       newuser->nextbyauthname=newuser->auth->nicks;
 137       newuser->auth->nicks=newuser;
 138       newuser->auth->flags=accountflags;
 139     } else {
 140       /*
 141          this is done for three reasons:
 142          1: so I don't have to change 500 pieces of code
 143          2: so services can be authed with special reserved ids
 144          3: saves space over the old authname per user method
 145        */
 146       newuser->authname=malloc(strlen(authname) + 1);
 147       strcpy(newuser->authname,authname);
 148     }
 149   }
 150
 151   if (connected) {
 152     /* Check for nick collision */
 153     if ((np=getnickbynick(nickname))!=NULL) {
 154       /* Make sure we will win the collision */
 155       newuser->timestamp=(np->timestamp-1);
 156       killuser(NULL, np, "Nick collision");
 157     }
 158     sendnickmsg(newuser);
 159   }
 160
 161   if (handler!=NULL) {
 162     umhandlers[(currentlocalunum&MAXLOCALUSER)]=handler;
 163   }
 164
 165   *(gethandlebynumeric(newuser->numeric))=newuser;
 166   addnicktohash(newuser);
 167   triggerhook(HOOK_NICK_NEWNICK,newuser);
 168
 169   return newuser;
 170 }
 171
 172 /*
 173  * renamelocaluser:
 174  *  This function changes the name of a given local user
 175  */
 176
 177 int renamelocaluser(nick *np, char *newnick) {
 178   nick *np2;
 179   char ipbuf[25];
 180   time_t timestamp=getnettime();
 181
 182   if (!np)
 183     return -1;
 184
 185   if (strlen(newnick) > NICKLEN)
 186     return -1;
 187
 188   if (homeserver(np->numeric)!=mylongnum)
 189     return -1;
 190
 191   if ((np2=getnickbynick(newnick))) {
 192     if (np2==np) {
 193       /* Case only name change */
 194       strncpy(np->nick,newnick,NICKLEN);
 195       np->nick[NICKLEN]='\0';
 196       irc_send("%s N %s %jd",iptobase64(ipbuf, &(np->p_ipaddr), sizeof(ipbuf), 1),np->nick,(intmax_t)np->timestamp);
 197       triggerhook(HOOK_NICK_RENAME,np);
 198       return 0;
 199     } else {
 200       /* Kill other user and drop through */
 201       timestamp=np2->timestamp-1;
 202       killuser(NULL, np2, "Nick collision");
 203     }
 204   }
 205
 206   np->timestamp=timestamp;
 207   removenickfromhash(np);
 208   strncpy(np->nick,newnick,NICKLEN);
 209   np->nick[NICKLEN]='\0';
 210   addnicktohash(np);
 211   irc_send("%s N %s %jd",longtonumeric(np->numeric,5),np->nick,(intmax_t)np->timestamp);
 212   triggerhook(HOOK_NICK_RENAME,np);
 213
 214   return 0;
 215 }
 216
 217 /*
 218  * deregisterlocaluser:
 219  *  This function removes the given local user from the network
 220  */
 221
 222 int deregisterlocaluser(nick *np, char *reason) {
 223   long numeric;
 224   char reasonstr[512];
 225   void *harg[2];
 226
 227   if (np==NULL || (homeserver(np->numeric)!=mylongnum)) {
 228     /* Non-existent user, or user not on this server */
 229     return -1;
 230   }
 231
 232   if (reason==NULL || *reason=='\0') {
 233     sprintf(reasonstr,"Quit");
 234   } else {
 235     snprintf(reasonstr,510,"Quit: %s",reason);
 236   }
 237
 238   harg[0]=np;
 239   harg[1]=reasonstr;
 240
 241   triggerhook(HOOK_NICK_QUIT, harg);
 242
 243   numeric=np->numeric;
 244   umhandlers[np->numeric&MAXLOCALUSER]=NULL;
 245   deletenick(np);
 246   if (connected) {
 247     irc_send("%s Q :%s",longtonumeric(numeric,5),reasonstr);
 248   }
 249
 250   return 0;
 251 }
 252
 253 /*
 254  * hooklocaluserhandler:
 255  *  This function adds a new handler to the hook chain for a local user
 256  *  THIS RELIES ON MODULES BEING UNLOADED IN THE CORRECT ORDER.
 257  */
 258 UserMessageHandler hooklocaluserhandler(nick *np, UserMessageHandler newhandler) {
 259   UserMessageHandler oldhandler = NULL;
 260   if (np==NULL || (homeserver(np->numeric)!=mylongnum)) {
 261     /* Non-existent user, or user not on this server */
 262     return NULL;
 263   }
 264   oldhandler = umhandlers[np->numeric&MAXLOCALUSER];
 265   umhandlers[np->numeric&MAXLOCALUSER]=newhandler;
 266   return oldhandler;
 267 }
 268
 269 /*
 270  * sendnickmsg:
 271  *  Sends details of a given local nick to the network.
 272  */
 273
 274 void sendnickmsg(nick *np) {
 275   char numericbuf[6];
 276   char ipbuf[25], operbuf[ACCOUNTLEN + 5];
 277   char accountbuf[100];
 278
 279   strncpy(numericbuf,longtonumeric(np->numeric,5),5);
 280   numericbuf[5]='\0';
 281
 282   if(IsOper(np) && (serverlist[myhub].flags & SMODE_OPERNAME)) {
 283     snprintf(operbuf,sizeof(operbuf)," %s",np->opername?np->opername->content:"-");
 284   } else {
 285     operbuf[0] = '\0';
 286   }
 287
 288   accountbuf[0]='\0';
 289   if (IsAccount(np)) {
 290     if (np->auth) {
 291       if(np->auth->flags) {
 292         snprintf(accountbuf,sizeof(accountbuf)," %s:%ld:%lu:%"PRIu64,np->authname,np->accountts,np->auth->userid,np->auth->flags);
 293       } else {
 294         snprintf(accountbuf,sizeof(accountbuf)," %s:%ld:%lu",np->authname,np->accountts,np->auth->userid);
 295       }
 296     } else if(np->authname) {
 297       snprintf(accountbuf,sizeof(accountbuf)," %s:%ld:0",np->authname,np->accountts);
 298     }
 299   }
 300
 301   irc_send("%s N %s 1 %ld %s %s %s%s%s %s %s :%s",
 302     mynumeric->content,np->nick,np->timestamp,np->ident,np->host->name->content,
 303     printflags(np->umodes,umodeflags),operbuf,accountbuf,iptobase64(ipbuf,&(np->p_ipaddr),
 304     sizeof(ipbuf),1),numericbuf,np->realname->name->content);
 305 }
 306
 307 void sendnickburst(int hooknum, void *arg) {
 308   /* Send nick messages for all local users */
 309   nick **nh;
 310   int i;
 311
 312   nh=servernicks[numerictolong(mynumeric->content,2)];
 313   for (i=0;i<=MAXLOCALUSER;i++) {
 314     if (nh[i]!=NULL) {
 315       sendnickmsg(nh[i]);
 316     }
 317   }
 318 }
 319
 320 /* Check for a kill of a local user */
 321 void checklocalkill(int hooknum, void *arg) {
 322   void **args=arg;
 323   nick *target=args[0];
 324   char *reason=args[1];
 325   long numeric;
 326
 327   void *myargs[1];
 328   myargs[0]=reason;
 329
 330
 331   numeric=((nick *)target)->numeric;
 332
 333   if (homeserver(numeric)==mylongnum) {
 334     if (umhandlers[(numeric)&MAXLOCALUSER]!=NULL) {
 335       (umhandlers[(numeric)&MAXLOCALUSER])((nick *)target,LU_KILLED,myargs);
 336     }
 337   }
 338 }
 339
 340 int handleprivatemsgcmd(void *source, int cargc, char **cargv) {
 341   return handlemessageornotice(source, cargc, cargv, 0);
 342 }
 343
 344 int handleprivatenoticecmd(void *source, int cargc, char **cargv) {
 345   return handlemessageornotice(source, cargc, cargv, 1);
 346 }
 347
 348 /* Handle privmsg or notice command addressed to user */
 349 int handlemessageornotice(void *source, int cargc, char **cargv, int isnotice) {
 350   nick *sender;
 351   nick *target;
 352   char *ch;
 353   char targetnick[NICKLEN+1];
 354   int foundat;
 355   void *nargs[2];
 356   int i;
 357
 358   /* Should have target and message */
 359   if (cargc<2) {
 360     return CMD_OK;
 361   }
 362
 363   if (cargv[0][0]=='#' || cargv[0][0]=='+') {
 364     /* Channel message/notice */
 365     return CMD_OK;
 366   }
 367
 368   if ((sender=getnickbynumericstr((char *)source))==NULL) {
 369     Error("localuser",ERR_WARNING,"PRIVMSG from non existant user %s",(char *)source);
 370     return CMD_OK;
 371   }
 372
 373   /* Check for a "secure" message (foo@bar) */
 374   foundat=0;
 375   for (i=0,ch=cargv[0];(i<=NICKLEN) && (*ch);i++,ch++) {
 376     if (*ch=='@') {
 377       targetnick[i]='\0';
 378       foundat=1;
 379       break;
 380     } else {
 381       targetnick[i]=*ch;
 382     }
 383   }
 384
 385   if (!foundat) { /* Didn't find an @ sign, assume it's a numeric */
 386     if ((target=getnickbynumericstr(cargv[0]))==NULL) {
 387       Error("localuser",ERR_DEBUG,"Couldn't find target for %s",cargv[0]);
 388       return CMD_OK;
 389     }
 390   } else { /* Did find @, do a lookup by nick */
 391     if ((target=getnickbynick(targetnick))==NULL) {
 392       Error("localuser",ERR_DEBUG,"Couldn't find target for %s",cargv[0]);
 393       irc_send(":%s 401 %s %s :No such nick",myserver->content,sender->nick,cargv[0]);
 394       return CMD_OK;
 395     }
 396   }
 397
 398   if (homeserver(target->numeric)!=mylongnum) {
 399     Error("localuser",ERR_WARNING,"Got message/notice for someone not on my server");
 400     irc_send(":%s 401 %s %s :No such nick",myserver->content,sender->nick,cargv[0]);
 401     return CMD_OK;
 402   }
 403
 404   if (foundat && !IsService(target)) {
 405     Error("localuser",ERR_DEBUG,"Received secure message for %s, but user is not a service",cargv[0]);
 406     irc_send(":%s 401 %s %s :No such nick",myserver->content,sender->nick,cargv[0]);
 407     return CMD_OK;
 408   }
 409
 410   if (umhandlers[(target->numeric)&MAXLOCALUSER]==NULL) {
 411     /* No handler anyhow.. */
 412     return CMD_OK;
 413   }
 414
 415   /* Dispatch the message. */
 416   nargs[0]=(void *)sender;
 417   nargs[1]=(void *)cargv[1];
 418   (umhandlers[(target->numeric)&MAXLOCALUSER])(target,isnotice?LU_PRIVNOTICE:(foundat?LU_SECUREMSG:LU_PRIVMSG),nargs);
 419
 420   return CMD_OK;
 421 }
 422
 423 /* Send message to user */
 424 void sendmessagetouser(nick *source, nick *target, char *format, ... ) {
 425   char buf[BUFSIZE];
 426   char senderstr[6];
 427   va_list va;
 428
 429   longtonumeric2(source->numeric,5,senderstr);
 430
 431   va_start(va,format);
 432   /* 10 bytes of numeric, 5 bytes of fixed format + terminator = 17 bytes */
 433   /* So max sendable message is 495 bytes.  Of course, a client won't be able
 434    * to receive this.. */
 435
 436   vsnprintf(buf,BUFSIZE-17,format,va);
 437   va_end(va);
 438
 439   if (homeserver(target->numeric)!=mylongnum)
 440     irc_send("%s P %s :%s",senderstr,longtonumeric(target->numeric,5),buf);
 441 }
 442
 443 /* Send messageto server, we don't check, but noones going to want to put a server pointer in anyway... */
 444 void sendsecuremessagetouser(nick *source, nick *target, char *servername, char *format, ... ) {
 445   char buf[BUFSIZE];
 446   char senderstr[6];
 447   va_list va;
 448
 449   longtonumeric2(source->numeric,5,senderstr);
 450
 451   va_start(va,format);
 452   /* 10 bytes of numeric, 5 bytes of fixed format + terminator = 17 bytes */
 453   /* So max sendable message is 495 bytes.  Of course, a client won't be able
 454    * to receive this.. */
 455
 456   vsnprintf(buf,BUFSIZE-17,format,va);
 457   va_end(va);
 458
 459   if (homeserver(target->numeric)!=mylongnum)
 460     irc_send("%s P %s@%s :%s",senderstr,target->nick,servername,buf);
 461 }
 462
 463 /* Send notice to user */
 464 void sendnoticetouser(nick *source, nick *target, char *format, ... ) {
 465   char buf[BUFSIZE];
 466   char senderstr[6];
 467   va_list va;
 468
 469   longtonumeric2(source->numeric,5,senderstr);
 470
 471   va_start(va,format);
 472   /* 10 bytes of numeric, 5 bytes of fixed format + terminator = 17 bytes */
 473   /* So max sendable message is 495 bytes.  Of course, a client won't be able
 474    * to receive this.. */
 475
 476   vsnprintf(buf,BUFSIZE-17,format,va);
 477   va_end(va);
 478
 479   if (homeserver(target->numeric)!=mylongnum)
 480     irc_send("%s O %s :%s",senderstr,longtonumeric(target->numeric,5),buf);
 481 }
 482
 483 /* Kill user */
 484 void killuser(nick *source, nick *target, char *format, ... ) {
 485   char buf[BUFSIZE];
 486   va_list va;
 487   pendingkill *pk;
 488
 489   va_start(va, format);
 490   vsnprintf(buf, BUFSIZE-17, format, va);
 491   va_end (va);
 492
 493   if (hookqueuelength) {
 494     for (pk = pendingkilllist; pk; pk = pk->next)
 495       if (pk->target == target)
 496         return;
 497
 498     Error("localuser", ERR_DEBUG, "Adding pending kill for %s", target->nick);
 499     pk = (pendingkill *)malloc(sizeof(pendingkill));
 500     pk->source = source;
 501     pk->target = target;
 502     pk->reason = getsstring(buf, BUFSIZE);
 503     pk->next = pendingkilllist;
 504     pendingkilllist = pk;
 505   } else {
 506     _killuser(source, target, buf);
 507   }
 508 }
 509
 510 void sethostuser(nick *target, char *ident, char *host) {
 511   irc_send("%s SH %s %s %s", mynumeric->content, longtonumeric(target->numeric, 5), ident, host);
 512 }
 513
 514 void _killuser(nick *source, nick *target, char *reason) {
 515   char senderstr[6];
 516   char sourcestring[HOSTLEN+NICKLEN+3];
 517   char reasonstr[512];
 518   void *args[2];
 519
 520   if (!source) {
 521     /* If we have a null nick, use the server.. */
 522     strcpy(senderstr, mynumeric->content);
 523     strcpy(sourcestring, myserver->content);
 524   } else {
 525     strcpy(senderstr, longtonumeric(source->numeric,5));
 526     sprintf(sourcestring,"%s!%s",source->host->name->content, source->nick);
 527   }
 528
 529   snprintf(reasonstr,512,"%s (%s)",sourcestring,reason);
 530   reasonstr[511]='\0';
 531
 532   irc_send("%s D %s :%s",senderstr,longtonumeric(target->numeric,5),reasonstr);
 533
 534   args[0]=target;
 535   args[1]=reasonstr;
 536   triggerhook(HOOK_NICK_KILL, args);
 537
 538   deletenick(target);
 539 }
 540
 541 void clearpendingkills(int hooknum, void *arg) {
 542   pendingkill *pk;
 543
 544   pk = pendingkilllist;
 545   while (pk) {
 546     pendingkilllist = pk->next;
 547
 548     if (pk->target) {
 549       Error("localuser", ERR_DEBUG, "Processing pending kill for %s", pk->target->nick);
 550       _killuser(pk->source, pk->target, pk->reason->content);
 551     }
 552
 553     freesstring(pk->reason);
 554     free(pk);
 555     pk = pendingkilllist;
 556   }
 557 }
 558
 559 void checkpendingkills(int hooknum, void *arg) {
 560   nick *np = (nick *)arg;
 561   pendingkill *pk;
 562
 563   for (pk=pendingkilllist; pk; pk = pk->next) {
 564     if (pk->source == np) {
 565       Error("localuser", ERR_INFO, "Pending kill source %s got deleted, NULL'ing source for pending kill", np->nick);
 566       pk->source = NULL;
 567     }
 568     if (pk->target == np) {
 569       Error("localuser", ERR_INFO, "Pending kill target %s got deleted, NULL'ing target for pending kill", np->nick);
 570       pk->target = NULL;
 571     }
 572   }
 573 }
 574
 575 void sendaccountmessage(nick *np) {
 576   if (connected && IsAccount(np)) {
 577     if (np->auth) {
 578       if (np->auth->flags) {
 579         irc_send("%s AC %s %s %ld %lu %"PRIu64,mynumeric->content, longtonumeric(np->numeric,5), np->authname, np->accountts, np->auth->userid, np->auth->flags);
 580       } else {
 581         irc_send("%s AC %s %s %ld %lu",mynumeric->content, longtonumeric(np->numeric,5), np->authname, np->accountts, np->auth->userid);
 582       }
 583     } else {
 584       irc_send("%s AC %s %s %ld 0",mynumeric->content, longtonumeric(np->numeric,5), np->authname, np->accountts);
 585     }
 586   }
 587 }
 588
 589 /* Auth user, don't use to set flags after authing */
 590 void localusersetaccount(nick *np, char *accname, unsigned long accid, u_int64_t accountflags, time_t authTS) {
 591   if (IsAccount(np)) {
 592     Error("localuser",ERR_WARNING,"Tried to set account on user %s already authed", np->nick);
 593     return;
 594   }
 595
 596   SetAccount(np);
 597   np->accountts=authTS?authTS:getnettime();
 598
 599   if (accid) {
 600     np->auth=findorcreateauthname(accid, accname);
 601     np->auth->usercount++;
 602     np->authname=np->auth->name;
 603     np->nextbyauthname=np->auth->nicks;
 604     np->auth->nicks=np;
 605     np->auth->flags=accountflags;
 606   } else {
 607     np->auth=NULL;
 608     np->authname=malloc(strlen(accname) + 1);
 609     strcpy(np->authname,accname);
 610   }
 611
 612   sendaccountmessage(np);
 613
 614   triggerhook(HOOK_NICK_ACCOUNT, np);
 615 }
 616
 617 void localusersetumodes(nick *np, flag_t newmodes) {
 618   if (connected) {
 619     irc_send("%s M %s %s", longtonumeric(np->numeric,5), np->nick, printflagdiff(np->umodes, newmodes, umodeflags));
 620   }
 621
 622   np->umodes = newmodes;
 623 }
 624
 625 void localusersetaccountflags(authname *anp, u_int64_t accountflags) {
 626   void *arg[2];
 627   nick *np;
 628   u_int64_t oldflags = anp->flags;
 629
 630   arg[0] = anp;
 631   arg[1] = &oldflags;
 632   anp->flags = accountflags;
 633
 634   for(np=anp->nicks;np;np=np->nextbyauthname)
 635     sendaccountmessage(np);
 636
 637   triggerhook(HOOK_AUTH_FLAGSUPDATED, arg);
 638 }