Minor tweaks. Started doing aggregate bandwidth mode.

options.h

@@ -10,6 +10,12 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
+enum {
+  OPTION_AGGREGATE_OFF,
+  OPTION_AGGREGATE_SOURCE,
+  OPTION_AGGREGATE_DEST
+} option_aggregate_t;
+
 typedef struct {
     /* interface to listen on */
     char *interface;
@@ -24,6 +30,7 @@ typedef struct {
     int dnsresolution;
     int promiscuous;
     int showbars;
+    option_aggregate_t aggregate;
 
 } options_t;