I am trying to Emulate Belkin wemo switch from my Home automation controller to send voice command from amazon Echo.The controller supports lua language.
I am following up this file to send the UDP data from port 1900 of Controller to port 50000 of Echo. right now every time i send the data the Socket take the random port send data not from port 1900. Echo only make valid connection and reply if the data comes from the port 1900. I am scratching my head from last two days to make is work but havent figured it out yet.
Bellow is my code.
strData1 =
'HTTP/1.1 200 OK' ..
'HOST: 239.255.255.250:1900'..
'CACHE-CONTROL: max-age=100'..
'EXT:'..
'LOCATION: http://192.168.1.152:49153/description.xml'..
'SERVER: Linux/3.14.0 UPnP/1.0 IpBridge/1.19.0'..
'hue-bridgeid: B8AC6FFFFEC53475'..
'ST: upnp:rootdevice'..
'USN: uuid:2f402f80-da50-11e1-9b23-b8ac6fc53475::upnp:rootdevice'
local socket = require "socket"
local udp = socket.udp()
udp:settimeout(0)
udp:setsockname('*', 1900)
udp:setpeername('192.168.1.102', 50000) -- Echo IP and Port number
udp:sendto(strData1,'192.168.1.102',50000)
You were almost there: the documentation states that when using setpeername, send must be used instead of sendto.
Also, I guess it was a typo, but you are trying to send Data instead of strData1. Here is the corrected version:
strData1 =
'HTTP/1.1 200 OK' ..
'HOST: 239.255.255.250:1900'..
'CACHE-CONTROL: max-age=100'..
'EXT:'..
'LOCATION: http://192.168.1.152:49153/description.xml'..
'SERVER: Linux/3.14.0 UPnP/1.0 IpBridge/1.19.0'..
'hue-bridgeid: B8AC6FFFFEC53475'..
'ST: upnp:rootdevice'..
'USN: uuid:2f402f80-da50-11e1-9b23-b8ac6fc53475::upnp:rootdevice'
local socket = require "socket"
local udp = socket.udp()
udp:settimeout(0)
udp:setoption('reuseaddr',true)
udp:setsockname('*', 1900)
udp:setpeername('192.168.1.102', 50000) -- Echo IP and Port number
udp:send(strData1)
Tcpdump's capture shows that the source port is correct:
22:40:45.653222 IP my.super.secret.ip.1900 > 192.168.1.102.50000: UDP, length 280