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proxyprotocol: use github.com/pires/go-proxyproto #5915

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merged 6 commits into from
Dec 13, 2023
Merged

proxyprotocol: use github.com/pires/go-proxyproto #5915

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fbfcb35
proxyprotocol: use github.com/pires/go-proxyproto
mohammed90 Oct 24, 2023
fb6589f
Merge branch 'master' into switch-proxyprotocol-lib
mohammed90 Oct 24, 2023
67e567b
Fix typo: r/generelly/generally
mohammed90 Oct 24, 2023
bc04e74
add config options for `Deny` CIDR and fallback policy
mohammed90 Nov 1, 2023
8facd51
Merge branch 'master' into switch-proxyprotocol-lib
mohammed90 Nov 1, 2023
3a63b42
use `netip` package & trust unix sockets
mohammed90 Nov 3, 2023
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2 changes: 1 addition & 1 deletion go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,6 @@ require (
github.com/google/uuid v1.3.1
github.com/klauspost/compress v1.17.0
github.com/klauspost/cpuid/v2 v2.2.5
github.com/mastercactapus/proxyprotocol v0.0.4
github.com/mholt/acmez v1.2.0
github.com/prometheus/client_golang v1.15.1
github.com/quic-go/quic-go v0.39.1
Expand Down Expand Up @@ -117,6 +116,7 @@ require (
github.com/mitchellh/copystructure v1.2.0 // indirect
github.com/mitchellh/go-ps v1.0.0 // indirect
github.com/mitchellh/reflectwalk v1.0.2 // indirect
github.com/pires/go-proxyproto v0.7.0
github.com/pkg/errors v0.9.1 // indirect
github.com/prometheus/client_model v0.4.0 // indirect
github.com/prometheus/common v0.42.0 // indirect
Expand Down
4 changes: 2 additions & 2 deletions go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -352,8 +352,6 @@ github.com/lyft/protoc-gen-validate v0.0.13/go.mod h1:XbGvPuh87YZc5TdIa2/I4pLk0Q
github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
github.com/manifoldco/promptui v0.9.0 h1:3V4HzJk1TtXW1MTZMP7mdlwbBpIinw3HztaIlYthEiA=
github.com/manifoldco/promptui v0.9.0/go.mod h1:ka04sppxSGFAtxX0qhlYQjISsg9mR4GWtQEhdbn6Pgg=
github.com/mastercactapus/proxyprotocol v0.0.4 h1:qSY75IZF30ZqIU9iW1ip3I7gTnm8wRAnGWqPxCBVgq0=
github.com/mastercactapus/proxyprotocol v0.0.4/go.mod h1:X8FRVEDZz9FkrIoL4QYTBF4Ka4ELwTv0sah0/5NxCPw=
github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
github.com/mattn/go-colorable v0.1.1/go.mod h1:FuOcm+DKB9mbwrcAfNl7/TZVBZ6rcnceauSikq3lYCQ=
github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
Expand Down Expand Up @@ -433,6 +431,8 @@ github.com/performancecopilot/speed v3.0.0+incompatible/go.mod h1:/CLtqpZ5gBg1M9
github.com/peterbourgon/diskv/v3 v3.0.1 h1:x06SQA46+PKIUftmEujdwSEpIx8kR+M9eLYsUxeYveU=
github.com/pierrec/lz4 v1.0.2-0.20190131084431-473cd7ce01a1/go.mod h1:3/3N9NVKO0jef7pBehbT1qWhCMrIgbYNnFAZCqQ5LRc=
github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
github.com/pires/go-proxyproto v0.7.0 h1:IukmRewDQFWC7kfnb66CSomk2q/seBuilHBYFwyq0Hs=
github.com/pires/go-proxyproto v0.7.0/go.mod h1:Vz/1JPY/OACxWGQNIRY2BeyDmpoaWmEP40O9LbuiFR4=
github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
Expand Down
29 changes: 13 additions & 16 deletions modules/caddyhttp/proxyprotocol/listenerwrapper.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,11 +15,10 @@
package proxyprotocol

import (
"fmt"
"net"
"time"

"github.com/mastercactapus/proxyprotocol"
goproxy "github.com/pires/go-proxyproto"

"github.com/caddyserver/caddy/v2"
)
Expand All @@ -39,31 +38,29 @@ type ListenerWrapper struct {
// allow/require PROXY headers from.
Allow []string `json:"allow,omitempty"`

rules []proxyprotocol.Rule
policies []goproxy.PolicyFunc
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Why store this in a slice when there can be one func at once? proxyproto takes a slice of IP address and return a function. There is no need to store it in a slice.

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It's my attempt at future-proofing. proxyproto has a selection of policies. We can also build more as long as they conform to the PolicyFunc type. My thinking is we could expand the implementation later to unionize policies.

}

// Provision sets up the listener wrapper.
func (pp *ListenerWrapper) Provision(ctx caddy.Context) error {
rules := make([]proxyprotocol.Rule, 0, len(pp.Allow))
for _, s := range pp.Allow {
_, n, err := net.ParseCIDR(s)
if len(pp.Allow) > 0 {
allowlist, err := goproxy.LaxWhiteListPolicy(pp.Allow)
if err != nil {
return fmt.Errorf("invalid subnet '%s': %w", s, err)
return err
}
rules = append(rules, proxyprotocol.Rule{
Timeout: time.Duration(pp.Timeout),
Subnet: n,
})
pp.policies = append(pp.policies, allowlist)
}

pp.rules = rules

return nil
}

// WrapListener adds PROXY protocol support to the listener.
func (pp *ListenerWrapper) WrapListener(l net.Listener) net.Listener {
pl := proxyprotocol.NewListener(l, time.Duration(pp.Timeout))
pl.SetFilter(pp.rules)
pl := &goproxy.Listener{
Listener: l,
ReadHeaderTimeout: time.Duration(pp.Timeout),
}
if len(pp.policies) > 0 {
pl.Policy = pp.policies[0]
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Just use a field of type PolicyFunc and assign it here.

}
return pl
}
44 changes: 21 additions & 23 deletions modules/caddyhttp/reverseproxy/httptransport.go
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,7 @@ import (
"strings"
"time"

"github.com/mastercactapus/proxyprotocol"
"github.com/pires/go-proxyproto"
"go.uber.org/zap"
"golang.org/x/net/http2"

Expand Down Expand Up @@ -207,44 +207,42 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
if !ok {
return nil, fmt.Errorf("failed to get proxy protocol info from context")
}

// The src and dst have to be of the some address family. As we don't know the original
// dst address (it's kind of impossible to know) and this address is generelly of very
header := proxyproto.Header{
SourceAddr: &net.TCPAddr{
IP: proxyProtocolInfo.AddrPort.Addr().AsSlice(),
Port: int(proxyProtocolInfo.AddrPort.Port()),
Zone: proxyProtocolInfo.AddrPort.Addr().Zone(),
},
}
// The src and dst have to be of the same address family. As we don't know the original
// dst address (it's kind of impossible to know) and this address is generally of very
// little interest, we just set it to all zeros.
var destIP net.IP
switch {
case proxyProtocolInfo.AddrPort.Addr().Is4():
destIP = net.IPv4zero
header.TransportProtocol = proxyproto.TCPv4
header.DestinationAddr = &net.TCPAddr{
IP: net.IPv4zero,
}
case proxyProtocolInfo.AddrPort.Addr().Is6():
destIP = net.IPv6zero
header.TransportProtocol = proxyproto.TCPv6
header.DestinationAddr = &net.TCPAddr{
IP: net.IPv6zero,
}
default:
return nil, fmt.Errorf("unexpected remote addr type in proxy protocol info")
}

// TODO: We should probably migrate away from net.IP to use netip.Addr,
// but due to the upstream dependency, we can't do that yet.
switch h.ProxyProtocol {
case "v1":
header := proxyprotocol.HeaderV1{
SrcIP: net.IP(proxyProtocolInfo.AddrPort.Addr().AsSlice()),
SrcPort: int(proxyProtocolInfo.AddrPort.Port()),
DestIP: destIP,
DestPort: 0,
}
header.Version = 1
caddyCtx.Logger().Debug("sending proxy protocol header v1", zap.Any("header", header))
_, err = header.WriteTo(conn)
case "v2":
header := proxyprotocol.HeaderV2{
Command: proxyprotocol.CmdProxy,
Src: &net.TCPAddr{IP: net.IP(proxyProtocolInfo.AddrPort.Addr().AsSlice()), Port: int(proxyProtocolInfo.AddrPort.Port())},
Dest: &net.TCPAddr{IP: destIP, Port: 0},
}
header.Version = 2
caddyCtx.Logger().Debug("sending proxy protocol header v2", zap.Any("header", header))
_, err = header.WriteTo(conn)
default:
return nil, fmt.Errorf("unexpected proxy protocol version")
}

_, err = header.WriteTo(conn)
if err != nil {
// identify this error as one that occurred during
// dialing, which can be important when trying to
Expand Down
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