dtls | DTLS 1.0 client/server in go | TLS library

I need to open two DTLS sockets on different IPs on the same port of the host. Using :gen_udp with {:reuseaddr, true} it works fine. But not with :ssl.listen

You can reproduce it with the following commands:

I'm trying to launch this on AWS Ubuntu.

It works fine under Chrome on localhost. (There was an issue with Firefox, hopefully running remotely with HTTPS will make the problem disappear. But that's unrelated to this question.)

I opened the ports that are specified on readme.MD using the AWS console (inbound TCP to port 3000, inbound UDP to ports 40000-49999, all outgoing traffic is allowed.)

Then adapted config.json to:

I am exploring on DTLS 1.2 using Californium-Scandium demo-apps projects. It appears that Scandium-core README.md supports the latest draft of Connection Identifiers for DTLS 1.2. According to Connection Identifiers for DTLS 1.2, the CID exchange happens between the Client & the server if client and server wants to talk on based of Connection Id. When I run the demo-apps of Scandium Server & Scandium Client, I am not able to see the exchange of CID happening between the client and the server. Though I can see the Connection Id generation on Client as well Server side of DTLS. I have added the logger in the Record.java but the connection Id is always null in the loggers. My question is whether the CID exchange logic between the DTLS Server and DTLS client is implemented in scandium-core API? If yes, please help me to find out the classes used for this.

The cookie exchange initiated by HelloVerifyRequest described in section 4.2.1 of RFC 6347 is essential to DoS-protection in DTLS. Unless I'm overlooking something, the WolfSSL documentation does not really describe how to enable this cookie exchange with its DTLS implementation.

The closest I can find is the function wolfSSL_send_hrr_cookie, about which the manual states:

This function is called on the server side to indicate that a HelloRetryRequest message must contain a Cookie. The Cookie holds a hash of the current transcript so that another server process can handle the ClientHello in reply. The secret is used when generting the integrity check on the Cookie data.

As far as I understand, the HelloRetryRequest (compare HelloVerifyRequest) is TLS 1.3 terminology. DTLS 1.3 is not finalized. How does one enable and control the DTLS 1.0/1.2 cookie exchange in WolfSSL?

I need to populate my v-select multiselect element from json object I tried but it didn't work

This is what I get

Trying to write a server for DTLS that will currently just output the text that it receives. The working client is taken from https://github.com/stepheny/openssl-dtls-custom-bio and it sends and receives to its own server just fine.

However, when it sends to this server something strange is happening. Firstly the connection happens only sometimes, there seems to be no way to determine if the connection will start or not. Secondly, and that is even stranger the data is "delayed". One needs to send 6 messages for 1 message to arrive.

So this is the situation:

1. Start the server.
2. Start the client.
3. Hope for connection.
4. If connected type 5 messages in client to send to server, they are sent, but the server keeps having an error decoding them.
5. Once you send the 6th message you can note that the 1st message arrives on server.
6. Once you send the 7th, you will get the 2nd. Etc.

It should be noted that we are not talking about a time delay, there is no way to simply read 5 empty messages at the start of the server, the queue is empty. Only once the 6th message is sent is the queue populated with the 1st real message.

Code:

Can someone please help me from this following

to this following

I am unable to make this red border with CSS. Help is appreciated. Ignore the div width. Only thing I need help is the red background section. My code till now:

I wrote a procedure where the data gets updated/inserted simultaneously to the destination table from source table. The procedure is working fine for less no of records, but when i try to execute more records its taking more time to perform the operation.

Can we convert merge clause with bulk collect where the logic remains same ? i dint find any useful resources.

I have attached my merge procedure .

Apologies as the question might be a bit vague. Trying to establish webrtc connection to a webrtc-gateway. While performing the dtls handshaking with accept or connect function, it is throwing SocketException.

Here is the error: