Andy Dixon
52da3c13f6
Capture engine streams dumpcap pcapng into verbatim, hashed segments with per-segment tshark summaries; display filters, PDML dissection with verified byte ranges, export and import. Tests run in a Debian trixie container.
102 lines
2.5 KiB
Go
102 lines
2.5 KiB
Go
// Package helper defines the request protocol between the unprivileged core and
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// the root pilens-helper. Every operation is fixed and typed; there is no generic
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// command execution.
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package helper
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import (
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"context"
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"encoding/json"
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"errors"
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"net"
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"time"
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"pilens.dev/pilens/internal/config"
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)
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const DefaultSocket = "/run/pilens/helper.sock"
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type Request struct {
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Op string `json:"op"`
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Network *config.Network `json:"network,omitempty"`
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}
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type Response struct {
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OK bool `json:"ok"`
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Error string `json:"error,omitempty"`
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Data json.RawMessage `json:"data,omitempty"`
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}
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// Operation names.
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const (
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OpApplyNetwork = "apply_network"
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OpStatus = "status"
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OpStations = "stations"
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OpLeases = "leases"
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)
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type ApplyResult struct {
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Applied bool `json:"applied"`
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RolledBack bool `json:"rolled_back"`
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Steps []string `json:"steps"`
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Error string `json:"error,omitempty"`
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}
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type Status struct {
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TableLoaded bool `json:"table_loaded"`
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APState string `json:"ap_state"` // NM GENERAL.STATE or "absent"
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DnsmasqActive bool `json:"dnsmasq_active"`
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IPForward bool `json:"ip_forward"`
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Regdomain string `json:"regdomain"`
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Configured bool `json:"configured"`
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LastError string `json:"last_error,omitempty"`
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}
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type Station struct {
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MAC string `json:"mac"`
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SignalDBm *int `json:"signal_dbm,omitempty"`
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RxBytes uint64 `json:"rx_bytes"`
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TxBytes uint64 `json:"tx_bytes"`
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ConnectedS int64 `json:"connected_s"`
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InactiveMS int64 `json:"inactive_ms"`
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}
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type Lease struct {
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Expiry int64 `json:"expiry"` // unix seconds; 0 = infinite
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MAC string `json:"mac"`
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IP string `json:"ip"`
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Hostname string `json:"hostname"`
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}
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// Client talks to the helper socket.
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type Client struct{ Socket string }
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func (c Client) Call(ctx context.Context, req Request, out any) error {
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d := net.Dialer{}
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conn, err := d.DialContext(ctx, "unix", c.Socket)
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if err != nil {
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return errors.New("network helper unavailable: " + err.Error())
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}
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defer conn.Close()
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dl, ok := ctx.Deadline()
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if !ok {
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dl = time.Now().Add(2 * time.Minute)
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}
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conn.SetDeadline(dl)
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if err := json.NewEncoder(conn).Encode(req); err != nil {
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return err
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}
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var resp Response
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if err := json.NewDecoder(conn).Decode(&resp); err != nil {
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return err
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}
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if out != nil && len(resp.Data) > 0 {
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if err := json.Unmarshal(resp.Data, out); err != nil {
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return err
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}
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}
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if !resp.OK {
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return errors.New(resp.Error)
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}
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return nil
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}
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