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|
package main
import (
"bufio"
"errors"
"fmt"
"io"
"log"
"net"
"strconv"
"time"
)
/* todo : use real error code
* Many of which will be the same
*/
const (
ipcErrorNoPeer = 0
ipcErrorNoKeyValue = 1
ipcErrorInvalidKey = 2
ipcErrorInvalidValue = 2
ipcErrorInvalidPrivateKey = 3
ipcErrorInvalidPublicKey = 4
ipcErrorInvalidPort = 5
ipcErrorInvalidIPAddress = 6
)
type IPCError struct {
Code int
}
func (s *IPCError) Error() string {
return fmt.Sprintf("IPC error: %d", s.Code)
}
func (s *IPCError) ErrorCode() int {
return s.Code
}
func ipcGetOperation(socket *bufio.ReadWriter, dev *Device) {
}
func ipcSetOperation(device *Device, socket *bufio.ReadWriter) *IPCError {
scanner := bufio.NewScanner(socket)
device.mutex.Lock()
defer device.mutex.Unlock()
for scanner.Scan() {
var key string
var value string
var peer *Peer
// Parse line
line := scanner.Text()
if line == "\n" {
break
}
fmt.Println(line)
n, err := fmt.Sscanf(line, "%s=%s\n", &key, &value)
if n != 2 || err != nil {
fmt.Println(err, n)
return &IPCError{Code: ipcErrorNoKeyValue}
}
switch key {
/* Interface configuration */
case "private_key":
if value == "" {
device.privateKey = NoisePrivateKey{}
} else {
err := device.privateKey.FromHex(value)
if err != nil {
return &IPCError{Code: ipcErrorInvalidPrivateKey}
}
}
case "listen_port":
_, err := fmt.Sscanf(value, "%ud", &device.listenPort)
if err != nil {
return &IPCError{Code: ipcErrorInvalidPort}
}
case "fwmark":
panic(nil) // not handled yet
case "public_key":
var pubKey NoisePublicKey
err := pubKey.FromHex(value)
if err != nil {
return &IPCError{Code: ipcErrorInvalidPublicKey}
}
found, ok := device.peers[pubKey]
if ok {
peer = found
} else {
newPeer := &Peer{
publicKey: pubKey,
}
peer = newPeer
device.peers[pubKey] = newPeer
}
case "replace_peers":
if key == "true" {
device.RemoveAllPeers()
} else if key == "false" {
} else {
return &IPCError{Code: ipcErrorInvalidValue}
}
default:
/* Peer configuration */
if peer == nil {
return &IPCError{Code: ipcErrorNoPeer}
}
switch key {
case "remove":
peer.mutex.Lock()
device.RemovePeer(peer.publicKey)
peer = nil
case "preshared_key":
err := func() error {
peer.mutex.Lock()
defer peer.mutex.Unlock()
return peer.presharedKey.FromHex(value)
}()
if err != nil {
return &IPCError{Code: ipcErrorInvalidPublicKey}
}
case "endpoint":
ip := net.ParseIP(value)
if ip == nil {
return &IPCError{Code: ipcErrorInvalidIPAddress}
}
peer.mutex.Lock()
peer.endpoint = ip
peer.mutex.Unlock()
case "persistent_keepalive_interval":
secs, err := strconv.ParseInt(value, 10, 64)
if secs < 0 || err != nil {
return &IPCError{Code: ipcErrorInvalidValue}
}
peer.mutex.Lock()
peer.persistentKeepaliveInterval = time.Duration(secs) * time.Second
peer.mutex.Unlock()
case "replace_allowed_ips":
if key == "true" {
device.routingTable.RemovePeer(peer)
} else if key == "false" {
} else {
return &IPCError{Code: ipcErrorInvalidValue}
}
case "allowed_ip":
_, network, err := net.ParseCIDR(value)
if err != nil {
return &IPCError{Code: ipcErrorInvalidValue}
}
ones, _ := network.Mask.Size()
device.routingTable.Insert(network.IP, uint(ones), peer)
/* Invalid key */
default:
return &IPCError{Code: ipcErrorInvalidKey}
}
}
}
return nil
}
func ipcListen(dev *Device, socket io.ReadWriter) error {
buffered := func(s io.ReadWriter) *bufio.ReadWriter {
reader := bufio.NewReader(s)
writer := bufio.NewWriter(s)
return bufio.NewReadWriter(reader, writer)
}(socket)
for {
op, err := buffered.ReadString('\n')
if err != nil {
return err
}
log.Println(op)
switch op {
case "set=1\n":
err := ipcSetOperation(dev, buffered)
if err != nil {
fmt.Fprintf(buffered, "errno=%d\n", err.ErrorCode())
return err
} else {
fmt.Fprintf(buffered, "errno=0\n")
}
buffered.Flush()
case "get=1\n":
default:
return errors.New("handle this please")
}
}
}
|
