|
| 1 | +package core |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "net" |
| 7 | + "net/url" |
| 8 | + "strconv" |
| 9 | + "strings" |
| 10 | + |
| 11 | + "github.com/Arceliar/phony" |
| 12 | + "github.com/mdlayher/vsock" |
| 13 | +) |
| 14 | + |
| 15 | +type linkVSOCK struct { |
| 16 | + phony.Inbox |
| 17 | + *links |
| 18 | +} |
| 19 | + |
| 20 | +func (l *links) newLinkVSOCK() *linkVSOCK { |
| 21 | + lt := &linkVSOCK{ |
| 22 | + links: l, |
| 23 | + } |
| 24 | + return lt |
| 25 | +} |
| 26 | + |
| 27 | +func (l *linkVSOCK) dial(ctx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) { |
| 28 | + localPort, err := strconv.ParseUint(url.Port(), 10, 32) |
| 29 | + if err != nil { |
| 30 | + return nil, fmt.Errorf("no VSOCK port specified: %w", err) |
| 31 | + } |
| 32 | + contextID, err := urlParseContextID(url) |
| 33 | + if err != nil { |
| 34 | + return nil, fmt.Errorf("Unknown VSOCK host and cannot parse as numerical contextID: %w", err) |
| 35 | + } |
| 36 | + return vsock.Dial(contextID, uint32(localPort), nil) |
| 37 | +} |
| 38 | + |
| 39 | +func (l *linkVSOCK) listen(ctx context.Context, url *url.URL, _ string) (net.Listener, error) { |
| 40 | + localPort, err := strconv.ParseUint(url.Port(), 10, 32) |
| 41 | + if err != nil { |
| 42 | + return nil, fmt.Errorf("no VSOCK port specified: %w", err) |
| 43 | + } |
| 44 | + contextID, err := urlParseContextID(url) |
| 45 | + if err != nil { |
| 46 | + return nil, fmt.Errorf("Unknown VSOCK host and cannot parse as numerical contextID: %w", err) |
| 47 | + } |
| 48 | + return vsock.ListenContextID(contextID, uint32(localPort), nil) |
| 49 | +} |
| 50 | + |
| 51 | +func urlParseContextID(u *url.URL) (uint32, error) { |
| 52 | + var contextID uint32 |
| 53 | + |
| 54 | + switch strings.ToLower(u.Hostname()) { |
| 55 | + case "hypervisor": |
| 56 | + contextID = vsock.Hypervisor |
| 57 | + case "local": |
| 58 | + contextID = vsock.Local |
| 59 | + case "host": |
| 60 | + contextID = vsock.Host |
| 61 | + default: |
| 62 | + parsedHost, err := strconv.Atoi(u.Hostname()) |
| 63 | + if err != nil { |
| 64 | + return 0, err |
| 65 | + } |
| 66 | + contextID = uint32(parsedHost) |
| 67 | + } |
| 68 | + return contextID, nil |
| 69 | +} |
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