tree 34a92a48a2eb219ea2474a051db978f9c16d08ab
parent 07168294571a4e2f08ad9aca96ed2aaa5485164c
author danzh <danzh@google.com> 1605806340 -0800
committer Copybara-Service <copybara-worker@google.com> 1605806371 -0800

Add unused QuicSession interfaces to initiating IETF connection migration: MigratePath(), ValidatePath(). These new interfaces are used by toy client in e2e tests.

Add QuicPathValidator into QuicConnection to do IETF path validation.

Behavior changes:
Cancel path validation if there is any during connection close;

Don't handle socket write error if sending PATH_CHALLENGE on the alternative socket or if the package sent to the alternative peer address exceeds path MTU;

Propagate PATH_RESPONSE to path validator to complete path validation.

Added and modified end-to-end tests to demonstrate connection migration with path validation works on client side.

Protected by quic_reloadable_flag_quic_pass_path_response_to_validator.

PiperOrigin-RevId: 343304329
Change-Id: I53dc52e82fbb9c69f5d2e90e5c90e1be45bb7bb6