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https://github.com/yggdrasil-network/yggdrasil-go.git
synced 2025-04-28 06:05:06 +03:00
7ad7eb05d4
This address family is used in communication between virtual machines and their hosts. Advantages include that no virtual ethernet adapter and their respective address configuration and routing need to be setup. Rather, with this new link type, only a single yggdrasil interface can exist inside of the virtual machine. It can also be used inside of containers. There, the advantage over existing link types like unix sockets include, that no mount point need to be shared with the host and container. This provides more isolation. More information: https://man7.org/linux/man-pages/man7/vsock.7.html https://gist.github.com/nrdmn/7971be650919b112343b1cb2757a3fe6
69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
package core
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import (
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"context"
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"fmt"
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"net"
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"net/url"
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"strconv"
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"strings"
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"github.com/Arceliar/phony"
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"github.com/mdlayher/vsock"
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)
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type linkVSOCK struct {
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phony.Inbox
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*links
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}
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func (l *links) newLinkVSOCK() *linkVSOCK {
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lt := &linkVSOCK{
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links: l,
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}
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return lt
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}
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func (l *linkVSOCK) dial(ctx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) {
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localPort, err := strconv.ParseUint(url.Port(), 10, 32)
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if err != nil {
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return nil, fmt.Errorf("no VSOCK port specified: %w", err)
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}
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contextID, err := urlParseContextID(url)
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if err != nil {
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return nil, fmt.Errorf("Unknown VSOCK host and cannot parse as numerical contextID: %w", err)
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}
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return vsock.Dial(contextID, uint32(localPort), nil)
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}
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func (l *linkVSOCK) listen(ctx context.Context, url *url.URL, _ string) (net.Listener, error) {
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localPort, err := strconv.ParseUint(url.Port(), 10, 32)
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if err != nil {
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return nil, fmt.Errorf("no VSOCK port specified: %w", err)
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}
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contextID, err := urlParseContextID(url)
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if err != nil {
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return nil, fmt.Errorf("Unknown VSOCK host and cannot parse as numerical contextID: %w", err)
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}
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return vsock.ListenContextID(contextID, uint32(localPort), nil)
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}
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func urlParseContextID(u *url.URL) (uint32, error) {
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var contextID uint32
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switch strings.ToLower(u.Hostname()) {
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case "hypervisor":
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contextID = vsock.Hypervisor
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case "local":
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contextID = vsock.Local
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case "host":
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contextID = vsock.Host
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default:
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parsedHost, err := strconv.ParseUint(u.Hostname(), 10, 32)
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if err != nil {
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return 0, err
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}
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contextID = uint32(parsedHost)
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}
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return contextID, nil
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}
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