- Sat Jul 09, 2016 8:58 am
#50452
Hi
I have a device there I have to send an Request via UDP and get a Response back to the sending UDP Port.
Currently, I'm using this code for sending the udp packets.
I checked the packets with wireshark and the UDP-Source Port generated by this code seems to be random.
But without knowing the Source Port, I cannot start the necessary receiver to catch the response.
My Questions:
- Is it possible to set the source port for UDP Packets?
- If not, is it possible to get at least an information what UDP-Source Port was used?
I have a device there I have to send an Request via UDP and get a Response back to the sending UDP Port.
Currently, I'm using this code for sending the udp packets.
Code: Select all
cu=net.createConnection(net.UDP,0)
cu:connect(21105,"192.168.0.111")
cu:send(string.char(0x08 ,0x00 ,0x50 ,0x00 ,0x01 ,0x00, 0x01, 0x00))
cu:close();
I checked the packets with wireshark and the UDP-Source Port generated by this code seems to be random.
But without knowing the Source Port, I cannot start the necessary receiver to catch the response.
My Questions:
- Is it possible to set the source port for UDP Packets?
- If not, is it possible to get at least an information what UDP-Source Port was used?
Code: Select all
NodeMCU custom build by frightanic.com
branch: master
commit: b580bfe79e6e73020c2bd7cd92a6afe01a8bc867
SSL: false
modules: file,gpio,net,node,tmr,uart,wifi
build built on: 2016-07-02 18:29
powered by Lua 5.1.4 on SDK 1.5.1(e67da894)
