Add gopher-ls.nse by Toni Ruotto.

CHANGELOG

@@ -1,5 +1,8 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o [NSE] Added gopher-ls.nse by Toni Ruotto, which lists the root of a
+  Gopher server.
+
 o [NSE] Added modbus-discover.nse by Alexander Rudakov. This script
   enumerates Modbus slave ids and then tries to find device
   information about each of them.

scripts/gopher-ls.nse

@@ -0,0 +1,59 @@
+description = [[
+Lists files and directories at the root of a gopher service.
+]]
+
+---
+-- @output
+-- 70/tcp open  gopher
+-- |_gopher-ls: [txt] Gopher, the next big thing?, [dir] Tax Forms
+
+author = "Toni Ruottu"
+license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
+categories = {"default", "discovery", "safe"}
+
+require("nmap")
+require("stdnse")
+require("shortport")
+
+portrule = shortport.port_or_service (70, "gopher", {"tcp"})
+
+local function typelabel(type)
+	if type == "0" then
+		return "[txt]"
+	end
+	if type == "1" then
+		return "[dir]"
+	end
+	return string.format("[%s]", type)
+
+end
+
+action = function( host, port )
+
+	local socket = nmap.new_socket()
+	local status, err = socket:connect(host.ip, port.number)
+	if not status then
+		return
+	end
+	
+	socket:send("\r\n")
+
+	local buffer, _ = stdnse.make_buffer(socket, "\r\n")
+	local line = buffer()
+	local files = {}
+
+	while line ~= nil do
+		local fields = stdnse.strsplit("\t", line)
+		local first = fields[1]
+		if #first > 1 then
+			local type = string.sub(first, 1, 1)
+			if type ~= "i" then
+				local label = string.sub(first, 2)
+				table.insert(files, string.format("%s %s", typelabel(type), label))
+			end
+		end
+	line = buffer()
+	end
+	return stdnse.strjoin(", ", files)
+end
+

scripts/script.db

@@ -42,6 +42,7 @@ Entry { filename = "ftp-brute.nse", categories = { "auth", "intrusive", } }
 Entry { filename = "ftp-libopie.nse", categories = { "intrusive", "vuln", } }
 Entry { filename = "ftp-proftpd-backdoor.nse", categories = { "discovery", "intrusive", } }
 Entry { filename = "giop-info.nse", categories = { "discovery", "safe", } }
+Entry { filename = "gopher-ls.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "hddtemp-info.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "hostmap.nse", categories = { "discovery", "external", "intrusive", } }
 Entry { filename = "http-auth.nse", categories = { "auth", "default", "intrusive", } }