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DTLS: Update regression tests

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winlin 2021-03-09 22:26:50 +08:00
parent d4d11c2c18
commit 06f2e1462e
19 changed files with 3329 additions and 949 deletions
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222
trunk/3rdparty/srs-bench/vnet/udpproxy.go vendored Normal file
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// The MIT License (MIT)
//
// Copyright (c) 2021 srs-bench(ossrs)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package vnet
import (
"net"
"sync"
"time"
"github.com/pion/transport/vnet"
)
// A UDP proxy between real server(net.UDPConn) and vnet.UDPConn.
//
// High level design:
// ..............................................
// : Virtual Network (vnet) :
// : :
// +-------+ * 1 +----+ +--------+ :
// | :App |------------>|:Net|--o<-----|:Router | .............................
// +-------+ +----+ | | : UDPProxy :
// : | | +----+ +---------+ +---------+ +--------+
// : | |--->o--|:Net|-->o-| vnet. |-->o-| net. |--->-| :Real |
// : | | +----+ | UDPConn | | UDPConn | | Server |
// : | | : +---------+ +---------+ +--------+
// : | | ............................:
// : +--------+ :
// ...............................................
//
// The whole big picture:
// ......................................
// : Virtual Network (vnet) :
// : :
// +-------+ * 1 +----+ +--------+ :
// | :App |------------>|:Net|--o<-----|:Router | .............................
// +-------+ +----+ | | : UDPProxy :
// +-----------+ * 1 +----+ | | +----+ +---------+ +---------+ +--------+
// |:STUNServer|-------->|:Net|--o<-----| |--->o--|:Net|-->o-| vnet. |-->o-| net. |--->-| :Real |
// +-----------+ +----+ | | +----+ | UDPConn | | UDPConn | | Server |
// +-----------+ * 1 +----+ | | : +---------+ +---------+ +--------+
// |:TURNServer|-------->|:Net|--o<-----| | ............................:
// +-----------+ +----+ [1] | | :
// : 1 | | 1 <<has>> :
// : +---<>| |<>----+ [2] :
// : | +--------+ | :
// To form | *| v 0..1 :
// a subnet tree | o [3] +-----+ :
// : | ^ |:NAT | :
// : | | +-----+ :
// : +-------+ :
// ......................................
type UDPProxy struct {
// The router bind to.
router *vnet.Router
// Each vnet source, bind to a real socket to server.
// key is real server addr, which is net.Addr
// value is *aUDPProxyWorker
workers sync.Map
// For each endpoint, we never know when to start and stop proxy,
// so we stop the endpoint when timeout.
timeout time.Duration
// For utest, to mock the target real server.
// Optional, use the address of received client packet.
mockRealServerAddr *net.UDPAddr
}
// NewProxy create a proxy, the router for this proxy belongs/bind to. If need to proxy for
// please create a new proxy for each router. For all addresses we proxy, we will create a
// vnet.Net in this router and proxy all packets.
func NewProxy(router *vnet.Router) (*UDPProxy, error) {
v := &UDPProxy{router: router, timeout: 2 * time.Minute}
return v, nil
}
// Close the proxy, stop all workers.
func (v *UDPProxy) Close() error {
// nolint:godox // TODO: FIXME: Do cleanup.
return nil
}
// Proxy starts a worker for server, ignore if already started.
func (v *UDPProxy) Proxy(client *vnet.Net, server *net.UDPAddr) error {
// Note that even if the worker exists, it's also ok to create a same worker,
// because the router will use the last one, and the real server will see a address
// change event after we switch to the next worker.
if _, ok := v.workers.Load(server.String()); ok {
// nolint:godox // TODO: Need to restart the stopped worker?
return nil
}
// Not exists, create a new one.
worker := &aUDPProxyWorker{
router: v.router, mockRealServerAddr: v.mockRealServerAddr,
}
v.workers.Store(server.String(), worker)
return worker.Proxy(client, server)
}
// A proxy worker for a specified proxy server.
type aUDPProxyWorker struct {
router *vnet.Router
mockRealServerAddr *net.UDPAddr
// Each vnet source, bind to a real socket to server.
// key is vnet client addr, which is net.Addr
// value is *net.UDPConn
endpoints sync.Map
}
func (v *aUDPProxyWorker) Proxy(client *vnet.Net, serverAddr *net.UDPAddr) error { // nolint:gocognit
// Create vnet for real server by serverAddr.
nw := vnet.NewNet(&vnet.NetConfig{
StaticIP: serverAddr.IP.String(),
})
if err := v.router.AddNet(nw); err != nil {
return err
}
// We must create a "same" vnet.UDPConn as the net.UDPConn,
// which has the same ip:port, to copy packets between them.
vnetSocket, err := nw.ListenUDP("udp4", serverAddr)
if err != nil {
return err
}
// Start a proxy goroutine.
var findEndpointBy func(addr net.Addr) (*net.UDPConn, error)
// nolint:godox // TODO: FIXME: Do cleanup.
go func() {
buf := make([]byte, 1500)
for {
n, addr, err := vnetSocket.ReadFrom(buf)
if err != nil {
return
}
if n <= 0 || addr == nil {
continue // Drop packet
}
realSocket, err := findEndpointBy(addr)
if err != nil {
continue // Drop packet.
}
if _, err := realSocket.Write(buf[:n]); err != nil {
return
}
}
}()
// Got new vnet client, start a new endpoint.
findEndpointBy = func(addr net.Addr) (*net.UDPConn, error) {
// Exists binding.
if value, ok := v.endpoints.Load(addr.String()); ok {
// Exists endpoint, reuse it.
return value.(*net.UDPConn), nil
}
// The real server we proxy to, for utest to mock it.
realAddr := serverAddr
if v.mockRealServerAddr != nil {
realAddr = v.mockRealServerAddr
}
// Got new vnet client, create new endpoint.
realSocket, err := net.DialUDP("udp4", nil, realAddr)
if err != nil {
return nil, err
}
// Bind address.
v.endpoints.Store(addr.String(), realSocket)
// Got packet from real serverAddr, we should proxy it to vnet.
// nolint:godox // TODO: FIXME: Do cleanup.
go func(vnetClientAddr net.Addr) {
buf := make([]byte, 1500)
for {
n, _, err := realSocket.ReadFrom(buf)
if err != nil {
return
}
if n <= 0 {
continue // Drop packet
}
if _, err := vnetSocket.WriteTo(buf[:n], vnetClientAddr); err != nil {
return
}
}
}(addr)
return realSocket, nil
}
return nil
}