mac os x portability fix from christophe thil

CHANGELOG

@@ -1,4 +1,8 @@
 # Nmap Changelog ($Id$); -*-text-*-
+o Fix a portability problem related to the new traceroute
+  functionality so that it compiles on Mac OS X.  Thanks to Christophe
+  Thil for reporting the problem and sending the 1-line fix.
+
 4.21ALPHA3
 
 o Just fixed a packaging problem with the 4.21ALPHA2 release (thanks

docs/nmap.1

@@ -2,7 +2,7 @@
 .\" It was generated using the DocBook XSL Stylesheets (version 1.69.1).
 .\" Instead of manually editing it, you probably should edit the DocBook XML
 .\" source for it and then use the DocBook XSL Stylesheets to regenerate it.
-.TH "NMAP" "1" "03/15/2007" "" "Nmap Reference Guide"
+.TH "NMAP" "1" "03/16/2007" "" "Nmap Reference Guide"
 .\" disable hyphenation
 .nh
 .\" disable justification (adjust text to left margin only)
@@ -117,6 +117,7 @@ SCAN TECHNIQUES:
   \-sI <zombie host[:probeport]>: Idlescan
   \-sO: IP protocol scan
   \-b <ftp relay host>: FTP bounce scan
+  \-\-traceroute: Trace hop path to each host
 PORT SPECIFICATION AND SCAN ORDER:
   \-p <port ranges>: Only scan specified ports
     Ex: \-p22; \-p1\-65535; \-p U:53,111,137,T:21\-25,80,139,8080

docs/nmap.usage.txt

@@ -1,4 +1,4 @@
-Nmap 4.21ALPHA2 ( http://insecure.org )
+Nmap 4.21ALPHA3 ( http://insecure.org )
 Usage: nmap [Scan Type(s)] [Options] {target specification}
 TARGET SPECIFICATION:
   Can pass hostnames, IP addresses, networks, etc.

traceroute.h

@@ -124,7 +124,7 @@
 
 #define NAMEIPLEN MAXHOSTNAMELEN+INET6_ADDRSTRLEN
 
-#ifdef WIN32
+#if defined(WIN32) || defined(MACOSX)
  #define ICMP_ECHOREPLY 0
  #define ICMP_DEST_UNREACH 3
  #define ICMP_ECHO 8