Added support for displaying ports.

options.h

@@ -16,6 +16,13 @@ typedef enum {
   OPTION_AGGREGATE_DEST
 } option_aggregate_t;
 
+typedef enum {
+  OPTION_PORTS_OFF,
+  OPTION_PORTS_AGGSRC,
+  OPTION_PORTS_AGGDEST,
+  OPTION_PORTS_ON
+} option_port_t;
+
 typedef struct {
     /* interface on which to listen */
     char *interface;
@@ -30,6 +37,7 @@ typedef struct {
     int dnsresolution;
     int promiscuous;
     int showbars;
+    option_port_t showports;
     option_aggregate_t aggregate;
 
 } options_t;