From: Chris Porter <redacted>
Date: Sun, 7 Jun 2009 15:57:48 +0000 (+0100)
Subject: PROXYSCAN: Add DIRECT_IRC scan type.
X-Git-Url: https://jfr.im/git/irc/quakenet/newserv.git/commitdiff_plain/c7be40f844dc291512058f8226a7e5eea1a183d5

PROXYSCAN: Add DIRECT_IRC scan type.
---

diff --git a/proxyscan/proxyscan.c b/proxyscan/proxyscan.c
index 03b74e06..cfc46c6f 100644
--- a/proxyscan/proxyscan.c
+++ b/proxyscan/proxyscan.c
@@ -279,6 +279,10 @@ void _init(void) {
   proxyscan_addscantype(STYPE_HTTP, 63809);
   proxyscan_addscantype(STYPE_HTTP, 63000);
   proxyscan_addscantype(STYPE_SOCKS4, 29992);
+  proxyscan_addscantype(STYPE_DIRECT_IRC, 6667);
+  proxyscan_addscantype(STYPE_DIRECT_IRC, 6668);
+  proxyscan_addscantype(STYPE_DIRECT_IRC, 6669);
+  proxyscan_addscantype(STYPE_DIRECT_IRC, 6670);
  
   /* Schedule saves */
   schedulerecurring(time(NULL)+3600,0,3600,&dumpcachehosts,NULL);
@@ -693,6 +697,16 @@ void handlescansock(int fd, short events) {
     case STYPE_DIRECT:
       /* Do nothing */
       break;    
+
+    case STYPE_DIRECT_IRC:
+      sprintf(buf,"PRIVMSG\r\n");
+      if ((write(fd,buf,strlen(buf)))<strlen(buf)) {
+	killsock(sp, SOUTCOME_CLOSED);
+        return;
+      }
+      
+      /* Do nothing */
+      break;    
     }                
     break;
     
@@ -709,24 +723,38 @@ void handlescansock(int fd, short events) {
     
     sp->bytesread+=res;
     sp->totalbytesread+=res;
-    for (i=0;i<sp->bytesread - MAGICSTRINGLENGTH;i++) {
-      if (!strncmp(sp->readbuf+i, MAGICSTRING, MAGICSTRINGLENGTH)) {
-        /* Found the magic string */
-        /* If the offset is 0, this means it was the first thing we got from the socket, 
-         * so it's an actual IRCD (sheesh).  Note that when the buffer is full and moved,
-         * the thing moved to offset 0 would previously have been tested as offset 
-         * PSCAN_READBUFSIZE/2. 
-         *
-         * Skip this checking for STYPE_DIRECT scans, which are used to detect trojans setting
-         * up portforwards (which will therefore show up as ircds, we rely on the port being
-         * strange enough to avoid false positives */
-        if (i==0 && (sp->type != STYPE_DIRECT)) {
-          killsock(sp, SOUTCOME_CLOSED);
+
+    {
+      char *magicstring;
+      int magicstringlength;
+
+      if(sp->type != STYPE_DIRECT_IRC) {
+        magicstring = MAGICSTRING;
+        magicstringlength = MAGICSTRINGLENGTH;
+      } else {
+        magicstring = MAGICIRCSTRING;
+        magicstringlength = MAGICIRCSTRINGLENGTH;
+      }
+
+      for (i=0;i<sp->bytesread - magicstringlength;i++) {
+        if (!strncmp(sp->readbuf+i, magicstring, magicstringlength)) {
+          /* Found the magic string */
+          /* If the offset is 0, this means it was the first thing we got from the socket, 
+           * so it's an actual IRCD (sheesh).  Note that when the buffer is full and moved,
+           * the thing moved to offset 0 would previously have been tested as offset 
+           * PSCAN_READBUFSIZE/2. 
+           *
+           * Skip this checking for STYPE_DIRECT scans, which are used to detect trojans setting
+           * up portforwards (which will therefore show up as ircds, we rely on the port being
+           * strange enough to avoid false positives */
+          if (i==0 && (sp->type != STYPE_DIRECT)) {
+            killsock(sp, SOUTCOME_CLOSED);
+            return;
+          }
+        
+          killsock(sp, SOUTCOME_OPEN);
           return;
         }
-        
-        killsock(sp, SOUTCOME_OPEN);
-        return;
       }
     }
     
diff --git a/proxyscan/proxyscan.h b/proxyscan/proxyscan.h
index 2b7441fa..110ba302 100644
--- a/proxyscan/proxyscan.h
+++ b/proxyscan/proxyscan.h
@@ -5,10 +5,14 @@
 #include "../nick/nick.h"
 #include "../lib/splitline.h"
 #include <time.h>
+#include <stdint.h>
 
 #define MAGICSTRING         "NOTICE AUTH :*** Looking up your hostname\r\n"
 #define MAGICSTRINGLENGTH   42
 
+#define MAGICIRCSTRING      ".quakenet.org 451 *  :Register first.\r\n"
+#define MAGICIRCSTRINGLENGTH 38
+
 #define PSCAN_MAXSCANS      50
 #define PSCAN_READBUFSIZE   (MAGICSTRINGLENGTH * 2)
 
@@ -21,7 +25,8 @@
 #define STYPE_HTTP          2
 #define STYPE_WINGATE       3
 #define STYPE_CISCO         4
-#define STYPE_DIRECT        5
+#define STYPE_DIRECT        5 /* not sure what this is so I'm leaving it alone */
+#define STYPE_DIRECT_IRC    6
 
 #define SOUTCOME_INPROGRESS 0
 #define SOUTCOME_OPEN       1
diff --git a/proxyscan/proxyscandb.c b/proxyscan/proxyscandb.c
index f7912357..a6924c7d 100644
--- a/proxyscan/proxyscandb.c
+++ b/proxyscan/proxyscandb.c
@@ -99,6 +99,10 @@ const char *scantostr(int type) {
     case STYPE_DIRECT:
       reason="forward";
       break;
+
+    case STYPE_DIRECT_IRC:
+      reason="forward (irc)";
+      break;
   }
    
   return reason;