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|
package main
import (
"bufio"
"crypto/tls"
"errors"
"io"
"log"
"net"
"os"
"sync"
ircgomsg "github.com/ergochat/irc-go/ircmsg"
"golang.org/x/net/proxy"
)
func RunGhost(ghostNetwork GhostNetwork, name string) {
var listener net.Listener
var err error
if ghostNetwork.ServerKey == "" || ghostNetwork.ServerCert == "" {
log.Printf("Ghost %s: either one or both of ServerKey and ServerCert were not provided. ghosty will not be listening on TLS.", name)
listener, err = net.Listen("tcp", ghostNetwork.ListenAddress)
if err != nil {
log.Fatalf("Ghost %s: Failed to listen on %s: %v", name, ghostNetwork.ListenAddress, err)
}
} else {
tlsCert, err := os.ReadFile(ghostNetwork.ServerCert)
if err != nil {
log.Fatalf("Ghost %s: Failed to read TLS certificate file: %v", name, err)
}
tlsKey, err := os.ReadFile(ghostNetwork.ServerKey)
if err != nil {
log.Fatalf("Ghost %s: Failed to read TLS key file: %v", name, err)
}
cert, err := tls.X509KeyPair(tlsCert, tlsKey)
if err != nil {
log.Fatalf("Ghost %s: Failed to load TLS key pair: %v", name, err)
}
listener, err = tls.Listen("tcp", ghostNetwork.ListenAddress, &tls.Config{
MinVersion: tls.VersionTLS13,
Certificates: []tls.Certificate{cert},
})
if err != nil {
log.Fatalf("Ghost %s: Failed to listen on %s: %v", name, ghostNetwork.ListenAddress, err)
}
}
defer listener.Close()
log.Printf("Ghost %s: IRC Bouncer listening on %s", name, ghostNetwork.ListenAddress)
log.Printf("Ghost %s: Connecting clients to IRC server: %s", name, ghostNetwork.ServerAddress)
for {
clientConn, err := listener.Accept()
if err != nil {
log.Printf("Ghost %s: Failed to accept client connection: %v", name, err)
continue
}
go handleClientConnection(clientConn, ghostNetwork, name)
}
}
func proxyConnectinoTLS(clientConn net.Conn, ghostNetwork GhostNetwork, name string) *tls.Conn {
dialer, err := proxy.SOCKS5("tcp", ghostNetwork.UpstreamProxy, nil, proxy.Direct)
if err != nil {
log.Fatalf("Ghost %s: Failed to create SOCKS5 dialer: %v", name, err)
}
proxyCon, err := dialer.Dial("tcp", ghostNetwork.ServerAddress)
if err != nil {
log.Printf("Ghost %s: Failed to connect to IRC server %s via proxy %s: %v", name, ghostNetwork.ServerAddress, ghostNetwork.UpstreamProxy, err)
clientConn.Close()
return nil
}
var tlsConfig *tls.Config
if ghostNetwork.CertPath != "" && ghostNetwork.KeyPath != "" {
clientCert, err := tls.LoadX509KeyPair(ghostNetwork.CertPath, ghostNetwork.KeyPath)
if err != nil {
log.Fatalf("Ghost %s: Failed to load client TLS key pair: %v", name, err)
}
tlsConfig = &tls.Config{
ServerName: ghostNetwork.ServerName,
Certificates: []tls.Certificate{clientCert},
InsecureSkipVerify: ghostNetwork.SkipTLSVerify,
MinVersion: tls.VersionTLS13,
}
} else {
tlsConfig = &tls.Config{
ServerName: ghostNetwork.ServerName,
InsecureSkipVerify: ghostNetwork.SkipTLSVerify,
MinVersion: tls.VersionTLS13,
}
}
conn := tls.Client(proxyCon, tlsConfig)
err = conn.Handshake()
if err != nil {
log.Printf("Ghost %s: TLS handshake with IRC server %s failed: %v", name, ghostNetwork.ServerAddress, err)
clientConn.Close()
return nil
}
return conn
}
func connectionTLS(clientConn net.Conn, ghostNetwork GhostNetwork, name string) *tls.Conn {
clientCert, err := tls.LoadX509KeyPair(ghostNetwork.CertPath, ghostNetwork.KeyPath)
if err != nil {
log.Fatalf("Ghost %s: Failed to load client TLS key pair: %v", name, err)
}
tlsConfig := &tls.Config{
ServerName: ghostNetwork.ServerName,
Certificates: []tls.Certificate{clientCert},
InsecureSkipVerify: ghostNetwork.SkipTLSVerify,
MinVersion: tls.VersionTLS13,
}
conn, err := tls.Dial("tcp", ghostNetwork.ServerAddress, tlsConfig)
if err != nil {
log.Printf("Ghost %s: Failed to connect to IRC server %s with TLS: %v", name, ghostNetwork.ServerAddress, err)
clientConn.Close()
return nil
}
return conn
}
func proxyConnection(clientConn net.Conn, ghostNetwork GhostNetwork, name string) net.Conn {
dialer, err := proxy.SOCKS5("tcp", ghostNetwork.UpstreamProxy, nil, proxy.Direct)
if err != nil {
log.Fatalf("Ghost %s: Failed to create SOCKS5 dialer: %v", name, err)
}
proxyCon, err := dialer.Dial("tcp", ghostNetwork.ServerAddress)
if err != nil {
log.Printf("Ghost %s: Failed to connect to IRC server %s via proxy %s: %v", name, ghostNetwork.ServerAddress, ghostNetwork.UpstreamProxy, err)
clientConn.Close()
return nil
}
return proxyCon
}
func handleClientConnection(clientConn net.Conn, ghostNetwork GhostNetwork, name string) {
log.Printf("Ghost %s: Client connected from: %s", name, clientConn.RemoteAddr())
var ircServerConn net.Conn
var err error
if ghostNetwork.UpstreamProxy == "" {
if ghostNetwork.UseTLS {
ircServerConn = connectionTLS(clientConn, ghostNetwork, name)
} else {
ircServerConn, err = net.Dial("tcp", ghostNetwork.ServerAddress)
if err != nil {
log.Printf("Ghost %s: Failed to connect to IRC server %s: %v", name, ghostNetwork.ServerAddress, err)
clientConn.Close()
return
}
}
} else {
if ghostNetwork.UseTLS {
ircServerConn = proxyConnectinoTLS(clientConn, ghostNetwork, name)
} else {
ircServerConn = proxyConnection(clientConn, ghostNetwork, name)
}
}
if ircServerConn == nil {
return
}
log.Printf("Ghost %s: Successfully connected to IRC server: %s", name, ghostNetwork.ServerAddress)
done := make(chan struct{})
var once sync.Once
closeConnections := func() {
once.Do(func() {
clientConn.Close()
ircServerConn.Close()
close(done)
})
}
go relay(ghostNetwork.LogRaw, clientConn, ircServerConn, closeConnections, name)
go relay(ghostNetwork.LogRaw, ircServerConn, clientConn, closeConnections, name)
<-done
}
func relay(logRaw bool, src, dest net.Conn, closer func(), name string) {
reader := bufio.NewReader(src)
for {
line, err := reader.ReadString('\n')
if err != nil {
if !errors.Is(err, io.EOF) {
log.Printf("Ghost %s: Relay read error on: %v", name, err)
}
closer()
return
}
msg, err := ircgomsg.ParseLine(line)
if err != nil {
log.Printf("Ghost %s: Failed to parse IRC message: %v", name, err)
}
if msg.Command == "PRIVMSG" {
}
if msg.Command == "MSG" {
}
if logRaw {
log.Printf("Ghost %s: %v", name, msg)
}
_, err = io.WriteString(dest, line)
if err != nil {
closer()
return
}
}
}
|
