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10 changes: 10 additions & 0 deletions nats/discover.go
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ import (
"fmt"
"log"
"net"
"sync"

"github.com/pion/logging"
"github.com/pion/stun"
Expand Down Expand Up @@ -60,6 +61,7 @@ type NATS struct {
verbose bool
net *vnet.Net
dfErr error // filled by discoverFilteringBehavior
mu sync.Mutex
}

// NewNATS creats a new instance of NATS.
Expand Down Expand Up @@ -148,6 +150,7 @@ func (nats *NATS) Discover() (*DiscoverResult, error) {
var maddr stun.XORMappedAddress
if err = maddr.GetFrom(trRes.Msg); err != nil {
if err != nil {
<-filterDiscovDone
return nil, fmt.Errorf("XOR-MAPPED-ADDRESS not found")
}
}
Expand All @@ -165,6 +168,7 @@ func (nats *NATS) Discover() (*DiscoverResult, error) {
var caddr attrAddress
if err = caddr.getAs(trRes.Msg, attrTypeChangedAddress); err != nil {
if err != nil {
<-filterDiscovDone
return nil, fmt.Errorf("CHANGED-ADDRESS not found")
}
}
Expand Down Expand Up @@ -329,14 +333,20 @@ func (nats *NATS) performTransactionWith(c *turn.Client, changeIP, changePort bo
from := res.From.(*net.UDPAddr)
if changeIP {
if from.IP.Equal(c.STUNServerAddr().(*net.UDPAddr).IP) {
nats.mu.Lock()
nats.dfErr = fmt.Errorf("CHANGE-REQUEST ignored (IP)")
nats.mu.Unlock()
receivedCh <- false
return
}
}
if changePort {
if from.Port == c.STUNServerAddr().(*net.UDPAddr).Port {
nats.mu.Lock()
nats.dfErr = fmt.Errorf("CHANGE-REQUEST ignored (Port)")
nats.mu.Unlock()
receivedCh <- false
return
}
}

Expand Down