[TS-3612] Restructure Proxy Client Sessions to support transaction oriented Sessions execute transaction hooks and connection oriented Sessions execute session hooks

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.2.0
• Component/s: HTTP, HTTP/2, SPDY
• Assignee: Susan Hinrichs
• Reporter: Susan Hinrichs
• Created: 17/May/15 20:20
• Updated: 09/Sep/16 14:59
• Resolved: 16/Apr/16 16:22

Description

In the current code, transaction and session hooks don't have access to H2 and SPDY session data. This was partially addressed by TS-3578.

There was a discussion on the mailing list, and the consensus was that session hooks should be invoked on session-oriented sessions (H2, SPDY, and native HTTP/1.x) and transaction hooks should be invoked on transaction-oriented sessions.

http://dev.trafficserver.apache.narkive.com/OX9XK0xn/spdy-h2-and-session-hooks

Issue Links

• blocks: TS-4300 New API for introspection on TXN and perhaps SSNs protocol
• breaks: TS-4472 Number of active connections is incorrect
• breaks: TS-4527 vc error messages in 6.2.0 release
• is depended upon by: TS-3584 SPDY and H2 requests should not trigger connection keep-alive processing
• is depended upon by: TS-4012 tcp_reused log field doesn't work for http2
• is depended upon by: TS-4136 Incoming http connection stats should be correct regardless of the HTTP version
• is depended upon by: TS-3805 ASAN heap-use-after-free in ProxyClientSession::ssn_hook_get
• is related to: TS-4547 NULL handler being scheduled
• is related to: TS-1007 SSN Close called before TXN Close
• is related to: TS-3485 We should honor ip_allow.config ACLs for HTTP/2 streams
• is related to: TS-4469 TS-3612 changes cause crashes with some plugins
• is related to: TS-4838 After TS-3612 restructuring, very slow SSL sessions and HttpSM::state_raw_http_server_open errors
• relates to: TS-4299 FetchSM / H2 streams can hang if e.g. a plugin adds a Connection: close header
• relates to: TS-3578 Rearrange Client Session processing to give access to socket at SSN_CLOSE for all protocols
• relates to: TS-4361 Remove TS_FETCH_EVENT_* handlers from Http2ClientSession