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Don't disconnect clients when negotiation fails.

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This may happen if we receive an answer for a connection that has been
closed in the meantime.
This commit is contained in:
Juliusz Chroboczek 2020-10-01 13:47:48 +02:00
parent 9ce591e4c5
commit 13d6b7ad1f
1 changed files with 34 additions and 7 deletions
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41
rtpconn/webclient.go
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@ -486,10 +486,12 @@ func gotOffer(c *webClient, id string, offer webrtc.SessionDescription, renegoti
}) })
} }
var ErrUnknownId = errors.New("unknown id")
func gotAnswer(c *webClient, id string, answer webrtc.SessionDescription) error { func gotAnswer(c *webClient, id string, answer webrtc.SessionDescription) error {
down := getDownConn(c, id) down := getDownConn(c, id)
if down == nil { if down == nil {
return group.ProtocolError("unknown id in answer") return ErrUnknownId
} }
err := down.pc.SetRemoteDescription(answer) err := down.pc.SetRemoteDescription(answer)
if err != nil { if err != nil {
@ -790,7 +792,7 @@ func clientLoop(c *webClient, ws *websocket.Conn) error {
if err != nil { if err != nil {
log.Printf("Negotiate: %v", err) log.Printf("Negotiate: %v", err)
delDownConn(c, down.id) delDownConn(c, down.id)
err = failConnection( err = failUpConnection(
c, down.id, c, down.id,
"negotiation failed", "negotiation failed",
) )
@ -851,7 +853,7 @@ func clientLoop(c *webClient, ws *websocket.Conn) error {
for _, u := range up { for _, u := range up {
found := delUpConn(c, u.id) found := delUpConn(c, u.id)
if found { if found {
failConnection( failUpConnection(
c, u.id, c, u.id,
"permission denied", "permission denied",
) )
@ -880,7 +882,7 @@ func clientLoop(c *webClient, ws *websocket.Conn) error {
} }
} }
func failConnection(c *webClient, id string, message string) error { func failUpConnection(c *webClient, id string, message string) error {
if id != "" { if id != "" {
err := c.write(clientMessage{ err := c.write(clientMessage{
Type: "abort", Type: "abort",
@ -899,6 +901,25 @@ func failConnection(c *webClient, id string, message string) error {
return nil return nil
} }
func failDownConnection(c *webClient, id string, message string) error {
if id != "" {
err := c.write(clientMessage{
Type: "close",
Id: id,
})
if err != nil {
return err
}
}
if message != "" {
err := c.error(group.UserError(message))
if err != nil {
return err
}
}
return nil
}
func setPermissions(g *group.Group, id string, perm string) error { func setPermissions(g *group.Group, id string, perm string) error {
client := g.GetClient(id) client := g.GetClient(id)
if client == nil { if client == nil {
@ -970,7 +991,7 @@ func handleClientMessage(c *webClient, m clientMessage) error {
) )
if err != nil { if err != nil {
log.Printf("gotOffer: %v", err) log.Printf("gotOffer: %v", err)
return failConnection(c, m.Id, "negotiation failed") return failUpConnection(c, m.Id, "negotiation failed")
} }
case "answer": case "answer":
if m.Answer == nil { if m.Answer == nil {
@ -978,14 +999,20 @@ func handleClientMessage(c *webClient, m clientMessage) error {
} }
err := gotAnswer(c, m.Id, *m.Answer) err := gotAnswer(c, m.Id, *m.Answer)
if err != nil { if err != nil {
return err log.Printf("gotAnswer: %v", err)
message := ""
if err != ErrUnknownId {
message = "negotiation failed"
}
return failDownConnection(c, m.Id, message)
} }
case "renegotiate": case "renegotiate":
down := getDownConn(c, m.Id) down := getDownConn(c, m.Id)
if down != nil { if down != nil {
err := negotiate(c, down, true, true) err := negotiate(c, down, true, true)
if err != nil { if err != nil {
return err return failDownConnection(c, m.Id,
"renegotiation failed")
} }
} else { } else {
log.Printf("Trying to renegotiate unknown connection") log.Printf("Trying to renegotiate unknown connection")