This package has moved into go-libp2p as a sub-package, github.com/libp2p/go-libp2p/p2p/transport/tcp.
A libp2p transport implementation for tcp, including reuseport socket options.
go-tcp-transport is an implementation of the libp2p transport
interface that streams data over TCP/IP sockets. It is
included by default in the main go-libp2p "entry point" module.
go-tcp-transport is included as a dependency of go-libp2p, which is the most
common libp2p entry point. If you depend on go-libp2p, there is generally no
need to explicitly depend on this module.
go-tcp-transport is a standard Go module which can be installed with:
go get github.com/libp2p/go-tcp-transportThis repo is gomod-compatible, and users of
go 1.11 and later with modules enabled will automatically pull the latest tagged release
by referencing this package. Upgrades to future releases can be managed using go get,
or by editing your go.mod file as described by the gomod documentation.
TCP is one of the default transports enabled when constructing a standard libp2p Host, along with WebSockets.
Calling libp2p.New to construct a libp2p Host will enable
the TCP transport, unless you override the default transports by passing in
Options to libp2p.New.
To explicitly enable the TCP transport while constructing a host, use the
libp2p.Transport option, passing in the NewTCPTransport constructor function:
import (
libp2p "github.com/libp2p/go-libp2p"
tcp "github.com/libp2p/go-tcp-transport"
)
// TCP only:
h, err := libp2p.New(
libp2p.Transport(tcp.NewTCPTransport)
)The example above will replace the default transports with a single TCP transport. To add multiple transports:
// TCP and QUIC:
h, err := libp2p.New(
libp2p.Transport(tcp.NewTCPTransport),
libp2p.Transport(quic.NewTransport), // see https://github.com/libp2p/go-libp2p-quic-transport
)To use TCP transport options, pass them to the libp2p.Transport constructor:
h, err := libp2p.New(
libp2p.Transport(tcp.NewTCPTransport, tcp.DisableReuseport(), tcp.WithConnectionTimeout(20*time.Second))
)The TCP transport supports multiaddrs that contain a tcp
component, provided that there is sufficient addressing information for the IP
layer of the connection.
Examples:
| addr | description |
|---|---|
/ip4/1.2.3.4/tcp/1234 |
IPv4: 1.2.3.4, TCP port 1234 |
/ip6/::1/tcp/1234 |
IPv6 loopback, TCP port 1234 |
Because TCP lacks native connection security and stream multiplexing facilities, the TCP transport uses a transport upgrader to provide those features. The transport upgrader negotiates transport security and multiplexing for each connection according to the protocols supported by each party.
The SO_REUSEPORT socket option allows multiple processes
or threads to bind to the same TCP port, provided that all of them set the
socket option. This has some performance benefits, and it can potentially assist
in NAT traversal by only requiring one port to be accessible for many
connections.
The reuseport functionality is provided by a seperate module,
go-reuseport-transport. It
is enabled by default, but can be disabled at runtime by setting the
LIBP2P_TCP_REUSEPORT environment variable to false or 0.
PRs are welcome!
Small note: If editing the Readme, please conform to the standard-readme specification.
MIT © Jeromy Johnson
The last gx published version of this module was: 2.0.28: QmTGiDkw4eeKq31wwpQRk5GwWiReaxrcTQLuCCLWgfKo5M
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