138 lines
2.9 KiB
Go
138 lines
2.9 KiB
Go
package config
|
|
|
|
import (
|
|
"context"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"mpbl3p/crypto"
|
|
"mpbl3p/crypto/sharedkey"
|
|
"mpbl3p/proxy"
|
|
"mpbl3p/tcp"
|
|
"mpbl3p/udp"
|
|
"mpbl3p/udp/congestion"
|
|
"mpbl3p/udp/congestion/newreno"
|
|
"time"
|
|
)
|
|
|
|
func (c Configuration) Build(ctx context.Context, source proxy.Source, sink proxy.Sink) (*proxy.Proxy, error) {
|
|
p := proxy.NewProxy(0)
|
|
|
|
var g func() proxy.MacGenerator
|
|
var v func() proxy.MacVerifier
|
|
|
|
switch c.Host.Crypto {
|
|
case "None":
|
|
g = func() proxy.MacGenerator { return crypto.None{} }
|
|
v = func() proxy.MacVerifier { return crypto.None{} }
|
|
case "Blake2s":
|
|
key, err := base64.StdEncoding.DecodeString(c.Host.SharedKey)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if _, err := sharedkey.NewBlake2s(key); err != nil {
|
|
return nil, err
|
|
}
|
|
g = func() proxy.MacGenerator {
|
|
g, _ := sharedkey.NewBlake2s(key)
|
|
return g
|
|
}
|
|
v = func() proxy.MacVerifier {
|
|
v, _ := sharedkey.NewBlake2s(key)
|
|
return v
|
|
}
|
|
}
|
|
|
|
p.Source = source
|
|
p.Sink = sink
|
|
|
|
for _, peer := range c.Peers {
|
|
switch peer.Method {
|
|
case "TCP":
|
|
if err := buildTcp(ctx, p, peer, g, v); err != nil {
|
|
return nil, err
|
|
}
|
|
case "UDP":
|
|
if err := buildUdp(ctx, p, peer, g, v); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
}
|
|
|
|
return p, nil
|
|
}
|
|
|
|
func buildTcp(ctx context.Context, p *proxy.Proxy, peer Peer, g func() proxy.MacGenerator, v func() proxy.MacVerifier) error {
|
|
var laddr func() string
|
|
if peer.LocalPort == 0 {
|
|
laddr = func() string { return fmt.Sprintf("%s:", peer.GetLocalHost()) }
|
|
} else {
|
|
laddr = func() string { return fmt.Sprintf("%s:%d", peer.GetLocalHost(), peer.LocalPort) }
|
|
}
|
|
|
|
if peer.RemoteHost != "" {
|
|
f, err := tcp.InitiateFlow(laddr, fmt.Sprintf("%s:%d", peer.RemoteHost, peer.RemotePort))
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
p.AddConsumer(ctx, f, g())
|
|
p.AddProducer(ctx, f, v())
|
|
|
|
return nil
|
|
}
|
|
|
|
err := tcp.NewListener(ctx, p, laddr(), v, g)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func buildUdp(ctx context.Context, p *proxy.Proxy, peer Peer, g func() proxy.MacGenerator, v func() proxy.MacVerifier) error {
|
|
var laddr func() string
|
|
if peer.LocalPort == 0 {
|
|
laddr = func() string { return fmt.Sprintf("%s:", peer.GetLocalHost()) }
|
|
} else {
|
|
laddr = func() string { return fmt.Sprintf("%s:%d", peer.GetLocalHost(), peer.LocalPort) }
|
|
}
|
|
|
|
var c func() udp.Congestion
|
|
switch peer.Congestion {
|
|
case "None":
|
|
c = func() udp.Congestion { return congestion.NewNone() }
|
|
default:
|
|
fallthrough
|
|
case "NewReno":
|
|
c = func() udp.Congestion { return newreno.NewNewReno() }
|
|
}
|
|
|
|
if peer.RemoteHost != "" {
|
|
f, err := udp.InitiateFlow(
|
|
laddr,
|
|
fmt.Sprintf("%s:%d", peer.RemoteHost, peer.RemotePort),
|
|
v(),
|
|
g(),
|
|
c(),
|
|
time.Duration(peer.KeepAlive)*time.Second,
|
|
)
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
p.AddConsumer(ctx, f, g())
|
|
p.AddProducer(ctx, f, v())
|
|
|
|
return nil
|
|
}
|
|
|
|
err := udp.NewListener(ctx, p, laddr(), v, g, c)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|