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feat(proxyproto): add proxy protocol support (#7738)

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Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>
This commit is contained in:
Adphi
2026-02-11 02:14:05 +01:00
committed by GitHub
parent a100d0cca4
commit e9c0db32dc
15 changed files with 389 additions and 3 deletions
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14
core/dnsserver/server.go
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@@ -16,6 +16,7 @@ import (
"github.com/coredns/coredns/plugin/metrics/vars"
"github.com/coredns/coredns/plugin/pkg/edns"
"github.com/coredns/coredns/plugin/pkg/log"
cproxyproto "github.com/coredns/coredns/plugin/pkg/proxyproto"
"github.com/coredns/coredns/plugin/pkg/rcode"
"github.com/coredns/coredns/plugin/pkg/reuseport"
"github.com/coredns/coredns/plugin/pkg/trace"
@@ -24,6 +25,7 @@ import (
"github.com/miekg/dns"
ot "github.com/opentracing/opentracing-go"
"github.com/pires/go-proxyproto"
)
// Server represents an instance of a server, which serves
@@ -37,6 +39,8 @@ type Server struct {
ReadTimeout time.Duration // Read timeout for TCP
WriteTimeout time.Duration // Write timeout for TCP
connPolicy proxyproto.ConnPolicyFunc // Proxy Protocol connection policy function
server [2]*dns.Server // 0 is a net.Listener, 1 is a net.PacketConn (a *UDPConn) in our case.
m sync.Mutex // protects the servers
@@ -123,6 +127,9 @@ func NewServer(addr string, group []*Config) (*Server, error) {
}
}
site.pluginChain = stack
if site.ProxyProtoConnPolicy != nil {
s.connPolicy = site.ProxyProtoConnPolicy
}
}
if !s.debug {
@@ -181,6 +188,9 @@ func (s *Server) Listen() (net.Listener, error) {
if err != nil {
return nil, err
}
if s.connPolicy != nil {
l = &proxyproto.Listener{Listener: l, ConnPolicy: s.connPolicy}
}
return l, nil
}
@@ -195,7 +205,9 @@ func (s *Server) ListenPacket() (net.PacketConn, error) {
if err != nil {
return nil, err
}
if s.connPolicy != nil {
p = &cproxyproto.PacketConn{PacketConn: p, ConnPolicy: s.connPolicy}
}
return p, nil
}