56 lines
1.3 KiB
Lua
56 lines
1.3 KiB
Lua
local comm = require "comm"
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local nmap = require "nmap"
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local shortport = require "shortport"
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local string = require "string"
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description = [[
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Detects the UDP IAX2 service.
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The script sends an Inter-Asterisk eXchange (IAX) Revision 2 Control Frame POKE
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request and checks for a proper response. This protocol is used to enable VoIP
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connections between servers as well as client-server communication.
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]]
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---
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-- @usage
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-- nmap -sU -sV -p 4569 <target>
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-- @output
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-- PORT STATE SERVICE VERSION
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-- 4569/udp closed iax2
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author = "Ferdy Riphagen"
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license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
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categories = {"version"}
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portrule = shortport.version_port_or_service(4569, nil, "udp")
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action = function(host, port)
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-- see http://www.cornfed.com/iax.pdf for all options.
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local poke = "\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x06\x1e"
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local status, recv = comm.exchange(host, port, poke, {timeout=10000})
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if not status then
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return
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end
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if (#recv) == 12 then
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local byte11 = string.byte(recv, 11)
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local byte12 = string.byte(recv, 12)
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-- byte11 must be \x06 IAX Control Frame
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-- and byte12 must be \x03 or \x04
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if ((byte11 == 6) and
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(byte12 == 3 or byte12 == 4))
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then
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nmap.set_port_state(host, port, "open")
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port.version.name = "iax2"
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nmap.set_port_version(host, port)
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end
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end
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end
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