Changes

== Checkpoint and restore TCP connection ==

== Checkpoint and restore TCP connection ==

With the above sockoptions dumping and restoring TCP connection becomes possible. The crtools just reads the socket

With the above sockoptions dumping and restoring TCP connection becomes possible. The criu just reads the socket

state and restores it back letting the protocol resurrect the data sequence.

state and restores it back letting the protocol resurrect the data sequence.

no packets from peer should enter the stack, otherwise the RST will be sent by a kernel. In order to do so a simple

no packets from peer should enter the stack, otherwise the RST will be sent by a kernel. In order to do so a simple

netfilter rule is configured that drops all the packets from peer to a socket we're dealing with. This rule sits

netfilter rule is configured that drops all the packets from peer to a socket we're dealing with. This rule sits

in the host netfilter tables after the crtools dump command finishes and it should be there when you issue the

in the host netfilter tables after the criu dump command finishes and it should be there when you issue the

crtools restore one.

criu restore one.

That said, the command line option --tcp-established should be used when calling crtools to explicitly state, that the

That said, the command line option --tcp-established should be used when calling criu to explicitly state, that the

caller is aware of this "transitional" state of the netfilter.

caller is aware of this "transitional" state of the netfilter.