dns

package

v0.3.0 Latest Latest Go to latest Published: Sep 30, 2026 License: Apache-2.0 Imports: 12 Imported by: 0

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Repository

github.com/agent-substrate/substrate

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Documentation ¶

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Overview ¶

Package dns answers an actor's DNS from its sandbox's gateway namespace and writes the resolv.conf that points the actor at it.

Index ¶

func SandboxResolvConf(nameserver string, podResolvConf []byte) []byte
func Serve(ctx context.Context, relay Server, ns netns.Handle, port uint16) ([]io.Closer, []func(), error)
func WriteRootfsResolvConf(rootfs string, content []byte) error
type Server

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func SandboxResolvConf ¶

func SandboxResolvConf(nameserver string, podResolvConf []byte) []byte

SandboxResolvConf replaces the pod's nameservers with nameserver, the address the sandbox's DNS is served on, while preserving the pod's search domains and options for Kubernetes DNS.

func Serve ¶

func Serve(ctx context.Context, relay Server, ns netns.Handle, port uint16) ([]io.Closer, []func(), error)

Serve serves UDP and TCP DNS in the sandbox's local gateway namespace.

func WriteRootfsResolvConf ¶

func WriteRootfsResolvConf(rootfs string, content []byte) error

WriteRootfsResolvConf installs content at /etc/resolv.conf inside rootfs.

os.Root confines path traversal; unlinking prevents writes through existing links.

Types ¶

type Server ¶

type Server interface {
	ServePacket(ctx context.Context, pc net.PacketConn) error
	Serve(ctx context.Context, listener net.Listener) error
}

Server answers an actor's DNS. Satisfied by atunnel.DNSRelay; an interface so this package does not depend on it.

Source Files ¶

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