0.5.2

• Fix message delivery logic that blocked delivery of all server messages when server per-queue quota exceeded, making it concurrent per SMP queue, not per server.

0.5.1

• Fix server subscription logic bug that was leading to memory leak / resource exhaustion in some edge cases.

0.5.0

• No changes in SMP server implementation - it is backwards compatible with v0.4.1
• SMP agent changes:
  • URI syntax for SMP queues and connection requests.
  • long-term connections links ("contacts") in SMP agent protocol.
  • agent command changes:
    • REQ notification and ACPT command are used only with long-term connection links.
    • CONF notification and LET commands are used for normal duplex connections.

0.4.1

• Include migrations in the package

0.4.0

• SMP server implementation and SMP protocol changes:
  • support 3072 bit RSA key size
  • add SMP queue quotas
  • set default transport block size to 4096 bits
  • allow SMP client to change transport block size during transport connection handshake
• SMP agent implementation and protocol changes:
  • additional connection confirmation step for initiating party
  • automatically resume subscribed duplex connections once transport connection is resumed
  • passing an arbitrary binary information between parties during the duplex connection handshake - can be used to identify parties
  • asynchronous duplex connection handshake - the parties do not have to be online at the same time
  • asynchronous message delivery - the agent does not need transport connection to accept client messages for delivery
  • additional confirmation of message reception from the client to prevent message loss in case of process termination
  • set transport block size to 8192 bits (in the future the agent protocol can allow to have different block sizes for different duplex connections)
  • added client commands and notifications (see agent protocol):
    • REQ - the notification about joining party establishing connection
    • ACPT - the command to accept connection with the joining party
    • INFO - the notification with the information from the initiating party
    • DOWN/UP - the notifications about losing/resuming the connection
    • ACK - the command to confirm that the message reception/processing is complete
    • MID - the response to SEND confirming that the message is accepted by the agent
    • MERR - the notification about permanent message delivery error (e.g., ERR AUTH indicating that the queue was removed)

0.3.2

• Support websockets
• SMP server CLI commands

0.3.1

• Released to hackage.org
• SMP agent protocol changes:
  • move SMP server from agent commands NEW/JOIN to agent config
  • send CON to user only when the 1st party responds HELLO
• Fix REPLY vulnerability
• Fix transaction busy error

0.3.0

• SMP encrypted transport over TCP
• Standard X509/PKCS8 encoding for RSA keys
• Sign and verify agent messages
• Verify message integrity based on previous message hash and ID
• Prevent timing attack allowing to determine if queue exists
• Only allow correct RSA keys and signature sizes

0.2.0

• SMP client library
• SMP agent with E2E encryption

0.1.0

• SMP protocol server implementation without encryption