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[feat](protocol, client, server): replace DTLS with gRPC for tunnel implementation

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- Introduced gRPC-based tunnel design for bi-directional communication, replacing legacy DTLS transport.
- Added `HopGateTunnel` gRPC service with client and server logic for `OpenTunnel` stream handling.
- Updated client to use gRPC tunnel exclusively, including experimental entry point for stream-based HTTP proxying.
- Removed DTLS-specific client, server, and related dependencies (`pion/dtls`).
- Adjusted `cmd/server` to route gRPC and HTTP/HTTPS traffic dynamically on shared ports.
This commit is contained in:
dalbodeule
2025-12-11 16:48:17 +09:00
parent 17839def69
commit 64f730d2df
8 changed files with 463 additions and 392 deletions
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15
internal/proxy/client.go
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@@ -14,7 +14,6 @@ import (
"sync"
"time"
"github.com/dalbodeule/hop-gate/internal/dtls"
"github.com/dalbodeule/hop-gate/internal/logging"
"github.com/dalbodeule/hop-gate/internal/protocol"
)
@@ -144,9 +143,9 @@ type streamReceiver struct {
// Input channel for envelopes dispatched from the central readLoop. (en)
inCh chan *protocol.Envelope
// DTLS 세션 및 직렬화 codec / 로깅 핸들. (ko)
// DTLS session, wire codec and logging handles. (en)
sess dtls.Session
// 세션(write 방향) 및 직렬화 codec / 로깅 핸들. (ko)
// Session (write side only), wire codec and logging handles. (en)
sess io.ReadWriter
codec protocol.WireCodec
logger logging.Logger
@@ -161,7 +160,7 @@ type streamReceiver struct {
// newStreamReceiver initializes a streamReceiver for a single stream ID. (en)
func newStreamReceiver(
id protocol.StreamID,
sess dtls.Session,
sess io.ReadWriter,
codec protocol.WireCodec,
logger logging.Logger,
httpClient *http.Client,
@@ -604,7 +603,7 @@ func (p *ClientProxy) getStreamSender(id protocol.StreamID) *streamSender {
// - `handleStreamRequest` 내부 HTTP 매핑 로직을 `streamReceiver` 로 옮기고,
// - StartLoop 가 DTLS 세션 → per-stream goroutine 으로 이벤트를 분배하는 역할만 수행하도록
// 점진적으로 리팩터링할 예정입니다.
func (p *ClientProxy) StartLoop(ctx context.Context, sess dtls.Session) error {
func (p *ClientProxy) StartLoop(ctx context.Context, sess io.ReadWriter) error {
if ctx == nil {
ctx = context.Background()
}
@@ -839,7 +838,7 @@ func (p *ClientProxy) StartLoop(ctx context.Context, sess dtls.Session) error {
// handleHTTPEnvelope 는 기존 단일 HTTP 요청/응답 Envelope 경로를 처리합니다. (ko)
// handleHTTPEnvelope handles the legacy single HTTP request/response envelope path. (en)
func (p *ClientProxy) handleHTTPEnvelope(ctx context.Context, sess dtls.Session, env *protocol.Envelope) error {
func (p *ClientProxy) handleHTTPEnvelope(ctx context.Context, sess io.ReadWriter, env *protocol.Envelope) error {
if env.HTTPRequest == nil {
return fmt.Errorf("http envelope missing http_request payload")
}
@@ -896,7 +895,7 @@ func (p *ClientProxy) handleHTTPEnvelope(ctx context.Context, sess dtls.Session,
// handleStreamRequest 는 StreamOpen/StreamData/StreamClose 기반 HTTP 요청/응답 스트림을 처리합니다. (ko)
// handleStreamRequest handles an HTTP request/response exchange using StreamOpen/StreamData/StreamClose frames. (en)
func (p *ClientProxy) handleStreamRequest(ctx context.Context, sess dtls.Session, reader io.Reader, openEnv *protocol.Envelope) error {
func (p *ClientProxy) handleStreamRequest(ctx context.Context, sess io.ReadWriter, reader io.Reader, openEnv *protocol.Envelope) error {
codec := protocol.DefaultCodec
log := p.Logger