lameisp/lameisp.c

   1 /* lameisp.c */
   2
   3 #include "../control/control.h"
   4 #include "../lib/irc_string.h"
   5 #include "../localuser/localuserchannel.h"
   6 #include "../lib/version.h"
   7
   8 MODULE_VERSION("");
   9
  10 #define LI_CLONEMAX 2
  11 #define LI_KILL_MESSAGE "excess clones from your host"
  12
  13 static char *li_isps[] = {"*.t-dialin.net", NULL};
  14
  15 void li_nick(int hooknum, void *arg);
  16 void li_killyoungest(nick *np);
  17 int li_stats(void *source, int cargc, char **cargv);
  18
  19 int li_victims = 0;
  20 int li_ispscount;
  21
  22 void _init() {
  23   host *hp;
  24   int i, j;
  25
  26   /* little optimisation */
  27   for(i=0;li_isps[i];i++);
  28   li_ispscount = i;
  29
  30   /* ok, first time loading we have to go through every host
  31      and check for excess clones, and obviously kill the excess */
  32
  33   for (j=0;j<HOSTHASHSIZE;j++)
  34     for(hp=hosttable[j];hp;hp=hp->next)
  35       if (hp->clonecount > LI_CLONEMAX) /* if we have too many clones */
  36         for(i=0;i<li_ispscount;) /* cycle through the list of isps */
  37           if (match2strings(li_isps[i++], hp->name->content)) /* if our isp matches */
  38             do { /* repeatedly kill the youngest until we're within acceptable boundaries */
  39               li_killyoungest(hp->nicks);
  40             } while (hp->clonecount > LI_CLONEMAX);
  41
  42   registercontrolhelpcmd("victims", NO_OPER, 0, li_stats, "Usage: victims\nShows the amount of clients victimised by lameisp.");
  43   registerhook(HOOK_NICK_NEWNICK, &li_nick);
  44 }
  45
  46 void _fini () {
  47   deregisterhook(HOOK_NICK_NEWNICK, &li_nick);
  48   deregistercontrolcmd("victims", li_stats);
  49 }
  50
  51 void li_nick(int hooknum, void *arg) {
  52   nick *np=(nick *)arg;
  53   int i;
  54   if (np->host->clonecount > LI_CLONEMAX)
  55     for(i=0;i<li_ispscount;) /* cycle through isps */
  56       if (match2strings(li_isps[i++], np->host->name->content))
  57         li_killyoungest(np->host->nicks); /* kill only youngest as we have exactly LI_CLONEMAX clones */
  58 }
  59
  60 void li_killyoungest(nick *np) {
  61   nick *list = np, *youngest = list;
  62   for(list=list->host->nicks;list->next;list=list->nextbyhost) /* cycle through all nicks with this host */
  63     if (list->timestamp < youngest->timestamp) /* if we've got the youngest here */
  64       youngest = list; /* set value to this one */
  65
  66   li_victims++; /* ah, fresh victims for my ever-growing army of the undead */
  67   killuser(NULL, youngest, LI_KILL_MESSAGE); /* byebye */
  68 }
  69
  70 int li_stats(void *source, int cargc, char **cargv) {
  71   controlreply((nick *)source, "Victims: %d clients", li_victims);
  72
  73   return CMD_OK;
  74 }