proxyscan/proxyscanhandlers.c

   1 #include "proxyscan.h"
   2 #include "../irc/irc.h"
   3 #include "../lib/irc_string.h"
   4 #include "../core/error.h"
   5
   6 void proxyscan_newnick(int hooknum, void *arg) {
   7   nick *np=(nick *)arg;
   8   cachehost *chp;
   9   foundproxy *fpp, *nfpp;
  10   extrascan *esp, *espp;
  11
  12   int i;
  13
  14   /* Skip 127.* and 0.* hosts */
  15   if (irc_in_addr_is_loopback(&np->p_ipaddr) || !irc_in_addr_is_ipv4(&np->p_ipaddr))
  16     return;
  17
  18   unsigned int ip = irc_in_addr_v4_to_int(&np->p_ipaddr);
  19
  20   /* before we look at a normal host, see if we think we have an open proxy */
  21   if ((esp=findextrascan(np->ipnode))) {
  22     Error("proxyextra", ERR_ERROR, "connection from possible proxy %s", IPtostr(np->p_ipaddr));
  23     for (espp=esp;espp;espp=espp->nextbynode) {
  24       queuescan(np->ipnode, espp->type, espp->port, SCLASS_NORMAL, time(NULL));
  25     }
  26   }
  27
  28   /* ignore newnick for first 120s */
  29   if (ps_start_ts+120 > time(NULL))
  30     return;
  31
  32   /*
  33    * Logic for connecting hosts:
  34    *
  35    * If they're in the cache and clean, return.
  36    * If they're in the cache, dirty, and last scanned < 30
  37    *   mins ago, return (they will probably go away in a minute)
  38    * If they're in the cache and dirty:
  39    *  - gline them
  40    *  - trigger the "check" scans on the known proxies
  41    *  - trigger normal scans as for the case below..
  42    *
  43    * If they're not in the cache, we queue up their scans
  44    */
  45
  46   if ((chp=findcachehost(np->ipnode))) {
  47     if (!chp->proxies)
  48       return;
  49
  50     if (time(NULL) < (chp->lastscan + 1800))
  51       return;
  52
  53     /* Queue up all the normal scans - on the normal queue */
  54     for (i=0;i<numscans;i++) {
  55       /* If this port is open DON'T queue the scan - we'll start it later in the CHECK class */
  56       for (fpp=chp->proxies;fpp;fpp=fpp->next) {
  57         if (fpp->type == thescans[i].type && fpp->port == thescans[i].port)
  58           break;
  59
  60       if (!fpp)
  61         queuescan(np->ipnode, thescans[i].type, thescans[i].port, SCLASS_NORMAL, 0);
  62       }
  63     }
  64
  65     /* We want these scans to start around now, so we put them at the front of the priority queue */
  66     for (fpp=chp->proxies;fpp;fpp=nfpp) {
  67       nfpp=fpp->next;
  68       queuescan(np->ipnode, fpp->type, fpp->port, SCLASS_CHECK, time(NULL));
  69       freefoundproxy(fpp);
  70     }
  71
  72     /* set a SHORT gline - if they really have an open proxy the gline will be re-set, with a new ID */
  73     irc_send("%s GL * +*@%s 600 :Open Proxy, see http://www.quakenet.org/openproxies.html - ID: %d",
  74              mynumeric->content,IPtostr(np->p_ipaddr),chp->glineid);
  75
  76     chp->lastscan=time(NULL);
  77     chp->proxies=NULL;
  78     chp->glineid=0;
  79   } else {
  80     chp=addcleanhost(time(NULL));
  81     np->ipnode->exts[ps_cache_ext] = chp;
  82     patricia_ref_prefix(np->ipnode->prefix);
  83
  84     /* Queue up all the normal scans - on the normal queue */
  85     for (i=0;i<numscans;i++)
  86       queuescan(np->ipnode, thescans[i].type, thescans[i].port, SCLASS_NORMAL, 0);
  87   }
  88 }
  89