lameisp/lameisp.c

   1 /* lameisp.c */
   2
   3 #include "../control/control.h"
   4 #include "../lib/irc_string.h"
   5 #include "../localuser/localuserchannel.h"
   6
   7 #define LI_CLONEMAX 2
   8 #define LI_KILL_MESSAGE "excess clones from your host"
   9
  10 static char *li_isps[] = {"*.t-dialin.net", NULL};
  11
  12 void li_nick(int hooknum, void *arg);
  13 void li_killyoungest(nick *np);
  14 int li_stats(void *source, int cargc, char **cargv);
  15
  16 int li_victims = 0;
  17 int li_ispscount;
  18
  19 void _init() {
  20   host *hp;
  21   int i, j;
  22
  23   /* little optimisation */
  24   for(i=0;li_isps[i];i++);
  25   li_ispscount = i;
  26
  27   /* ok, first time loading we have to go through every host
  28      and check for excess clones, and obviously kill the excess */
  29
  30   for (j=0;j<HOSTHASHSIZE;j++)
  31     for(hp=hosttable[j];hp;hp=hp->next)
  32       if (hp->clonecount > LI_CLONEMAX) /* if we have too many clones */
  33         for(i=0;i<li_ispscount;) /* cycle through the list of isps */
  34           if (match2strings(li_isps[i++], hp->name->content)) /* if our isp matches */
  35             do { /* repeatedly kill the youngest until we're within acceptable boundaries */
  36               li_killyoungest(hp->nicks);
  37             } while (hp->clonecount > LI_CLONEMAX);
  38
  39   registercontrolhelpcmd("victims", NO_OPER, 0, li_stats, "Usage: victims\nShows the amount of clients victimised by lameisp.");
  40   registerhook(HOOK_NICK_NEWNICK, &li_nick);
  41 }
  42
  43 void _fini () {
  44   deregisterhook(HOOK_NICK_NEWNICK, &li_nick);
  45   deregistercontrolcmd("victims", li_stats);
  46 }
  47
  48 void li_nick(int hooknum, void *arg) {
  49   nick *np=(nick *)arg;
  50   int i;
  51   if (np->host->clonecount > LI_CLONEMAX)
  52     for(i=0;i<li_ispscount;) /* cycle through isps */
  53       if (match2strings(li_isps[i++], np->host->name->content))
  54         li_killyoungest(np->host->nicks); /* kill only youngest as we have exactly LI_CLONEMAX clones */
  55 }
  56
  57 void li_killyoungest(nick *np) {
  58   nick *list = np, *youngest = list;
  59   for(list=list->host->nicks;list->next;list=list->nextbyhost) /* cycle through all nicks with this host */
  60     if (list->timestamp < youngest->timestamp) /* if we've got the youngest here */
  61       youngest = list; /* set value to this one */
  62
  63   li_victims++; /* ah, fresh victims for my ever-growing army of the undead */
  64   killuser(NULL, youngest, LI_KILL_MESSAGE); /* byebye */
  65 }
  66
  67 int li_stats(void *source, int cargc, char **cargv) {
  68   controlreply((nick *)source, "Victims: %d clients", li_victims);
  69
  70   return CMD_OK;
  71 }