Reset error register when falling back to IPv4

mozilla · Jun 15, 2017 · 533d4bf · 533d4bf
1 parent 4a0b9db
commit 533d4bf
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Showing 3 changed files with 22 additions and 2 deletions.
diff --git a/lib/ssh_scan/client.rb b/lib/ssh_scan/client.rb
@@ -28,6 +28,17 @@ def banner
       @server_banner
     end
 
+    def close()
+      begin
+        unless @sock.nil?
+          @sock.close
+        end
+      rescue
+        @sock = nil
+      end
+      return true
+    end
+
     def connect()
       @error = nil
 

diff --git a/lib/ssh_scan/result.rb b/lib/ssh_scan/result.rb
@@ -211,6 +211,10 @@ def error=(error)
       @error = error.to_s
     end
 
+    def unset_error
+      @error = nil
+    end
+
     def error?
       !@error.nil?
     end

diff --git a/lib/ssh_scan/scan_engine.rb b/lib/ssh_scan/scan_engine.rb
@@ -36,30 +36,34 @@ def scan_target(socket, opts)
           client = SSHScan::Client.new(
             target.resolve_fqdn_as_ipv4.to_s, port, timeout
           )
-          client.connect()
+          client.connect
           result.set_client_attributes(client)
           kex_result = client.get_kex_result()
+          client.close
           result.set_kex_result(kex_result) unless kex_result.nil?
           result.error = client.error if client.error?
         # If it does resolve as IPv6, we're try IPv6
         else
           client = SSHScan::Client.new(
             target.resolve_fqdn_as_ipv6.to_s, port, timeout
           )
-          client.connect()
+          client.connect
           result.set_client_attributes(client)
           kex_result = client.get_kex_result()
+          client.close
           result.set_kex_result(kex_result) unless kex_result.nil?
           result.error = client.error if client.error?
 
           # If resolves as IPv6, but somehow we get an client error, fall-back to IPv4
           if result.error?
+            result.unset_error
             client = SSHScan::Client.new(
               target.resolve_fqdn_as_ipv4.to_s, port, timeout
             )
             client.connect()
             result.set_client_attributes(client)
             kex_result = client.get_kex_result()
+            client.close
             result.set_kex_result(kex_result) unless kex_result.nil?
             result.error = client.error if client.error?
           end
@@ -69,6 +73,7 @@ def scan_target(socket, opts)
         client.connect()
         result.set_client_attributes(client)
         kex_result = client.get_kex_result()
+        client.close
 
         unless kex_result.nil?
           result.set_kex_result(kex_result)