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caddytls: Fix sni_regexp matcher to obtain layer4 contexts (#6804)

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* caddytls: Fix sni_regexp matcher

* caddytls: Refactor sni_regexp matcher
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vnxme 2025-01-25 17:45:41 +03:00 committed by GitHub
parent 30743c361a
commit 7b8f3505e3
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GPG key ID: B5690EEEBB952194
1 changed files with 17 additions and 3 deletions
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20
modules/caddytls/matchers.go
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@ -15,6 +15,7 @@
package caddytls
import (
"context"
"crypto/tls"
"fmt"
"net"
@ -224,15 +225,28 @@ func (MatchServerNameRE) CaddyModule() caddy.ModuleInfo {
// Match matches hello based on SNI using a regular expression.
func (m MatchServerNameRE) Match(hello *tls.ClientHelloInfo) bool {
repl := caddy.NewReplacer()
// caddytls.TestServerNameMatcher calls this function without any context
if ctx := hello.Context(); ctx != nil {
// Note: caddytls.TestServerNameMatcher calls this function without any context
ctx := hello.Context()
if ctx == nil {
// layer4.Connection implements GetContext() to pass its context here,
// since hello.Context() returns nil
if mayHaveContext, ok := hello.Conn.(interface{ GetContext() context.Context }); ok {
ctx = mayHaveContext.GetContext()
}
}
var repl *caddy.Replacer
if ctx != nil {
// In some situations the existing context may have no replacer
if replAny := ctx.Value(caddy.ReplacerCtxKey); replAny != nil {
repl = replAny.(*caddy.Replacer)
}
}
if repl == nil {
repl = caddy.NewReplacer()
}
return m.MatchRegexp.Match(hello.ServerName, repl)
}