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   /* slug: why is this here? why isn't it with the other queuing stuff? */
  19   /* we're given a list of ip/subnets and port pairs which someone else has
  20      seen a proxy on in the past, so we scan these very aggressively
  21      (even ignoring the cache)
  22    */
  23   /* disabled as the list is hopelessly out of date */
  24 //  if ((esp=findextrascan(np->ipnode))) {
  25 //    Error("proxyextra", ERR_ERROR, "connection from possible proxy %s", IPtostr(np->p_ipaddr));
  26 //    for (espp=esp;espp;espp=espp->nextbynode) {
  27 //      /* we force a scan on any hosts that may be an open proxy, even if they are:
  28 //       * a) already in the queue, b) we've been running < 120 seconds */
  29 //      queuescan(np->ipnode, espp->type, espp->port, SCLASS_NORMAL, time(NULL));
  30 //    }
  31 //  }
  32
  33 /* slug: this BREAKS all of P's design assumptions, do NOT REENABLE THIS UNDER ANY CIRCUMSTANCES */
  34 /* ignore newnick until initial burst complete */
  35 /*  if (!ps_ready)
  36     return;
  37 */
  38
  39   /*
  40    * Logic for connecting hosts:
  41    *
  42    * If they're in the cache and clean, return.
  43    * If they're in the cache, dirty, and last scanned < 30
  44    *   mins ago, return (they will probably go away in a minute)
  45    * If they're in the cache and dirty:
  46    *  - gline them
  47    *  - trigger the "check" scans on the known proxies
  48    *  - trigger normal scans as for the case below..
  49    *
  50    * If they're not in the cache, we queue up their scans
  51    */
  52   if ((chp=findcachehost(np->ipnode))) {
  53     if (!chp->proxies)
  54       return;
  55
  56     if (time(NULL) < (chp->lastscan + 1800))
  57       return;
  58
  59     /* Queue up all the normal scans - on the normal queue */
  60     for (i=0;i<numscans;i++) {
  61       /* If this port is open DON'T queue the scan - we'll start it later in the CHECK class */
  62       for (fpp=chp->proxies;fpp;fpp=fpp->next) {
  63         if (fpp->type == thescans[i].type && fpp->port == thescans[i].port)
  64           break;
  65
  66       if (!fpp)
  67         queuescan(np->ipnode, thescans[i].type, thescans[i].port, SCLASS_NORMAL, 0);
  68       }
  69     }
  70
  71     /* We want these scans to start around now, so we put them at the front of the priority queue */
  72     for (fpp=chp->proxies;fpp;fpp=nfpp) {
  73       nfpp=fpp->next;
  74       queuescan(np->ipnode, fpp->type, fpp->port, SCLASS_CHECK, time(NULL));
  75       freefoundproxy(fpp);
  76     }
  77
  78     /* set a SHORT gline - if they really have an open proxy the gline will be re-set, with a new ID */
  79     irc_send("%s GL * +*@%s 600 %jd :Open Proxy, see http://www.quakenet.org/openproxies.html - ID: %d",
  80              mynumeric->content,IPtostr(np->p_ipaddr),(intmax_t)getnettime(), chp->glineid);
  81
  82     chp->lastscan=time(NULL);
  83     chp->proxies=NULL;
  84     chp->glineid=0;
  85   } else {
  86     chp=addcleanhost(time(NULL));
  87     np->ipnode->exts[ps_cache_ext] = chp;
  88     patricia_ref_prefix(np->ipnode->prefix);
  89
  90     /* Queue up all the normal scans - on the normal queue */
  91     for (i=0;i<numscans;i++)
  92       queuescan(np->ipnode, thescans[i].type, thescans[i].port, SCLASS_NORMAL, 0);
  93   }
  94 }