Files
flvx/go-gost/x/handler/forward/remote/metadata.go
T
root a98057d06a fix(gost): implement failover for multi-node forwarding rules (#12)
When a forwarding rule has multiple backend nodes configured, the first
node failure would cause the entire forward to fail instead of trying
the next available node.

Root causes fixed:
- FailFilter skipped filtering when only 1 node remained
- hop.Select() bypassed selector for single-node hops
- Handlers only attempted one node before giving up

Changes:
- selector/filter.go: Remove len<=1 early return, always filter failed nodes
- hop/hop.go: Remove single-node bypass, add ExcludeNodes context support
- ctx/value.go: Add ContextWithExcludeNodes/ExcludeNodesFromContext helpers
- handler/forward/local: Add maxRetries config, implement retry loop
- handler/forward/remote: Add maxRetries config, implement retry loop
- forwarder/sniffer.go: Add retry logic to dial() and dialTLS()

Closes #12
2026-02-04 04:12:38 +00:00

72 lines
2.1 KiB
Go

package remote
import (
"crypto"
"crypto/tls"
"crypto/x509"
"time"
"github.com/go-gost/core/bypass"
mdata "github.com/go-gost/core/metadata"
mdutil "github.com/go-gost/x/metadata/util"
"github.com/go-gost/x/registry"
)
type metadata struct {
readTimeout time.Duration
proxyProtocol int
httpKeepalive bool
sniffing bool
sniffingTimeout time.Duration
sniffingWebsocket bool
sniffingWebsocketSampleRate float64
certificate *x509.Certificate
privateKey crypto.PrivateKey
alpn string
mitmBypass bypass.Bypass
// maxRetries specifies the maximum number of failover retry attempts.
// When a target node fails, the handler will try the next available node.
// 0 means use the total number of available nodes (try all nodes once).
// Default: 0 (try all available nodes)
maxRetries int
}
func (h *forwardHandler) parseMetadata(md mdata.Metadata) (err error) {
h.md.readTimeout = mdutil.GetDuration(md, "readTimeout")
if h.md.readTimeout <= 0 {
h.md.readTimeout = 15 * time.Second
}
h.md.proxyProtocol = mdutil.GetInt(md, "proxyProtocol")
h.md.sniffing = mdutil.GetBool(md, "sniffing")
h.md.sniffingTimeout = mdutil.GetDuration(md, "sniffing.timeout")
h.md.sniffingWebsocket = mdutil.GetBool(md, "sniffing.websocket")
h.md.sniffingWebsocketSampleRate = mdutil.GetFloat(md, "sniffing.websocket.sampleRate")
h.md.httpKeepalive = mdutil.GetBool(md, "http.keepalive")
certFile := mdutil.GetString(md, "mitm.certFile", "mitm.caCertFile")
keyFile := mdutil.GetString(md, "mitm.keyFile", "mitm.caKeyFile")
if certFile != "" && keyFile != "" {
tlsCert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return err
}
h.md.certificate, err = x509.ParseCertificate(tlsCert.Certificate[0])
if err != nil {
return err
}
h.md.privateKey = tlsCert.PrivateKey
}
h.md.alpn = mdutil.GetString(md, "mitm.alpn")
h.md.mitmBypass = registry.BypassRegistry().Get(mdutil.GetString(md, "mitm.bypass"))
// maxRetries: 0 means try all available nodes (default behavior)
h.md.maxRetries = mdutil.GetInt(md, "maxRetries", "retry.max")
return
}