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MITM: Allow forwarding local negotiated ALPN http/1.1 to the real website

Browse source 
https://github.com/XTLS/Xray-core/issues/4348#issuecomment-2633656408

https://github.com/XTLS/Xray-core/issues/4348#issuecomment-2633865039

Local negotiated ALPN http/1.1 was sent by browser/app or is written in dokodemo-door RAW's `tlsSettings`.

Set `"alpn": ["fromMitm"]` in freedom RAW's `tlsSettings` to forward it to the real website.
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RPRX 2025-02-04 15:10:08 +00:00 • committed by GitHub
parent 480c7d7db7
commit 9b7841178a
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3 changed files with 27 additions and 1 deletions
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12
transport/internet/tcp/dialer.go
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@ -2,10 +2,12 @@ package tcp
import (
"context"
"strings"
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/errors"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/session"
"github.com/xtls/xray-core/transport/internet"
"github.com/xtls/xray-core/transport/internet/reality"
"github.com/xtls/xray-core/transport/internet/stat"
@ -24,7 +26,8 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
tlsConfig := config.GetTLSConfig(tls.WithDestination(dest))
if fingerprint := tls.GetFingerprint(config.Fingerprint); fingerprint != nil {
conn = tls.UClient(conn, tlsConfig, fingerprint)
if len(tlsConfig.NextProtos) == 1 && tlsConfig.NextProtos[0] == "http/1.1" {
if len(tlsConfig.NextProtos) == 1 && (tlsConfig.NextProtos[0] == "http/1.1" ||
(strings.ToLower(tlsConfig.NextProtos[0]) == "frommitm" && session.MitmAlpn11FromContext(ctx))) {
if err := conn.(*tls.UConn).WebsocketHandshakeContext(ctx); err != nil {
return nil, err
}
@ -34,6 +37,13 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
}
}
} else {
if len(tlsConfig.NextProtos) == 1 && strings.ToLower(tlsConfig.NextProtos[0]) == "frommitm" {
if session.MitmAlpn11FromContext(ctx) {
tlsConfig.NextProtos = []string{"http/1.1"} // new slice
} else {
tlsConfig.NextProtos = nil
}
}
conn = tls.Client(conn, tlsConfig)
}
} else if config := reality.ConfigFromStreamSettings(streamSettings); config != nil {