Show TTL in default output if "--reason -v" is asked for.

NmapOps.cc

@@ -347,6 +347,7 @@ void NmapOps::Initialize() {
   gettimeofday(&start_time, NULL);
   pTrace = vTrace = false;
   reason = false;
+  show_ttl = false;
   adler32 = false;
   if (datadir) free(datadir);
   datadir = NULL;

NmapOps.h

@@ -367,6 +367,7 @@ class NmapOps {
 
   bool traceroute;
   bool reason;
+  bool show_ttl;
   bool adler32;
   FILE *excludefd;
   char *exclude_spec;

nmap.cc

@@ -1465,6 +1465,9 @@ void  apply_delayed_options() {
   if (o.verbose > 1)
     o.reason = true;
 
+  if (o.verbose && o.reason)
+    o.show_ttl = true;
+
   // ISO 8601 date/time -- http://www.cl.cam.ac.uk/~mgk25/iso-time.html
   if (strftime(tbuf, sizeof(tbuf), "%Y-%m-%d %H:%M %Z", local_time) <= 0)
     fatal("Unable to properly format time");

output.cc

@@ -554,6 +554,7 @@ void printportoutput(Target *currenths, PortList *plist) {
   int servicecol = -1;          // service or protocol name
   int versioncol = -1;
   int reasoncol = -1;
+  int ttlcol = -1;
   int colno = 0;
   unsigned int rowno;
   int numrows;
@@ -666,6 +667,8 @@ void printportoutput(Target *currenths, PortList *plist) {
   servicecol = colno++;
   if (o.reason)
     reasoncol = colno++;
+  if (o.show_ttl)
+    ttlcol = colno++;
   if (o.servicescan)
     versioncol = colno++;
 
@@ -694,6 +697,8 @@ void printportoutput(Target *currenths, PortList *plist) {
     Tbl->addItem(0, versioncol, false, "VERSION", 7);
   if (reasoncol > 0)
     Tbl->addItem(0, reasoncol, false, "REASON", 6);
+  if (ttlcol > 0)
+    Tbl->addItem(0, ttlcol, false, "TTL", 3);
 
   log_write(LOG_MACHINE, "\t%s: ", (o.ipprotscan) ? "Protocols" : "Ports");
 
@@ -708,6 +713,8 @@ void printportoutput(Target *currenths, PortList *plist) {
           first = 0;
         if (o.reason)
           Tbl->addItem(rowno, reasoncol, true, port_reason_str(current->reason));
+        if (o.show_ttl)
+          Tbl->addItemFormatted(rowno, ttlcol, false, "%d", current->reason.ttl);
         state = statenum2str(current->state);
         proto = nmap_getprotbynum(current->portno);
         Snprintf(portinfo, sizeof(portinfo), "%s", proto ? proto->p_name : "unknown");
@@ -768,6 +775,8 @@ void printportoutput(Target *currenths, PortList *plist) {
         Tbl->addItem(rowno, servicecol, true, serviceinfo);
         if (o.reason)
           Tbl->addItem(rowno, reasoncol, true, port_reason_str(current->reason));
+        if (o.show_ttl)
+          Tbl->addItemFormatted(rowno, ttlcol, false, "%d", current->reason.ttl);
 
         sd.populateFullVersionString(fullversion, sizeof(fullversion));
         if (*fullversion && versioncol > 0)
@@ -1476,6 +1485,8 @@ void write_host_status(Target *currenths) {
       log_write(LOG_PLAIN, "Host is up");
       if (o.reason)
         log_write(LOG_PLAIN, ", %s", target_reason_str(currenths));
+      if (o.show_ttl)
+        log_write(LOG_PLAIN, " TTL %d", currenths->reason.ttl);
       if (currenths->to.srtt != -1)
         log_write(LOG_PLAIN, " (%ss latency)",
                   num_to_string_sigdigits(currenths->to.srtt / 1000000.0, 2));