move errors into subpackage

pkg/liberrors/server.go

@@ -0,0 +1,169 @@
+package liberrors
+
+import (
+	"fmt"
+
+	"github.com/aler9/gortsplib/pkg/base"
+	"github.com/aler9/gortsplib/pkg/headers"
+)
+
+// ErrServerTeardown is returned in case of a teardown request.
+type ErrServerTeardown struct{}
+
+// Error implements the error interface.
+func (e ErrServerTeardown) Error() string {
+	return "teardown"
+}
+
+// ErrServerCSeqMissing is returned in case the CSeq is missing.
+type ErrServerCSeqMissing struct{}
+
+// Error implements the error interface.
+func (e ErrServerCSeqMissing) Error() string {
+	return "CSeq is missing"
+}
+
+// ErrServerWrongState is returned in case of a wrong client state.
+type ErrServerWrongState struct {
+	AllowedList []fmt.Stringer
+	State       fmt.Stringer
+}
+
+// Error implements the error interface.
+func (e ErrServerWrongState) Error() string {
+	return fmt.Sprintf("must be in state %v, while is in state %v",
+		e.AllowedList, e.State)
+}
+
+// ErrServerNoPath is returned in case the path can't be retrieved.
+type ErrServerNoPath struct{}
+
+// Error implements the error interface.
+func (e ErrServerNoPath) Error() string {
+	return "RTSP path can't be retrieved"
+}
+
+// ErrServerContentTypeMissing is returned in case the Content-Type header is missing.
+type ErrServerContentTypeMissing struct{}
+
+// Error implements the error interface.
+func (e ErrServerContentTypeMissing) Error() string {
+	return "Content-Type header is missing"
+}
+
+// ErrServerContentTypeUnsupported is returned in case the Content-Type header is unsupported.
+type ErrServerContentTypeUnsupported struct {
+	CT base.HeaderValue
+}
+
+// Error implements the error interface.
+func (e ErrServerContentTypeUnsupported) Error() string {
+	return fmt.Sprintf("unsupported Content-Type header '%v'", e.CT)
+}
+
+// ErrServerSDPInvalid is returned in case the SDP is invalid.
+type ErrServerSDPInvalid struct {
+	Err error
+}
+
+// Error implements the error interface.
+func (e ErrServerSDPInvalid) Error() string {
+	return fmt.Sprintf("invalid SDP: %v", e.Err)
+}
+
+// ErrServerSDPNoTracksDefined is returned in case the SDP has no tracks defined.
+type ErrServerSDPNoTracksDefined struct{}
+
+// Error implements the error interface.
+func (e ErrServerSDPNoTracksDefined) Error() string {
+	return "no tracks defined in the SDP"
+}
+
+// ErrServerTransportHeaderInvalid is returned in case the transport header is invalid.
+type ErrServerTransportHeaderInvalid struct {
+	Err error
+}
+
+// Error implements the error interface.
+func (e ErrServerTransportHeaderInvalid) Error() string {
+	return fmt.Sprintf("invalid transport header: %v", e.Err)
+}
+
+// ErrServerTrackAlreadySetup is returned in case a track has already been setup.
+type ErrServerTrackAlreadySetup struct {
+	TrackID int
+}
+
+// Error implements the error interface.
+func (e ErrServerTrackAlreadySetup) Error() string {
+	return fmt.Sprintf("track %d has already been setup", e.TrackID)
+}
+
+// ErrServerTransportHeaderWrongMode is returned in case the transport header contains a wrong mode.
+type ErrServerTransportHeaderWrongMode struct {
+	Mode *headers.TransportMode
+}
+
+// Error implements the error interface.
+func (e ErrServerTransportHeaderWrongMode) Error() string {
+	return fmt.Sprintf("transport header contains a wrong mode (%v)", e.Mode)
+}
+
+// ErrServerTransportHeaderNoClientPorts is returned in case the transport header doesn't contain client ports.
+type ErrServerTransportHeaderNoClientPorts struct{}
+
+// Error implements the error interface.
+func (e ErrServerTransportHeaderNoClientPorts) Error() string {
+	return "transport header does not contain client ports"
+}
+
+// ErrServerTransportHeaderNoInterleavedIDs is returned in case the transport header doesn't contain interleaved IDs.
+type ErrServerTransportHeaderNoInterleavedIDs struct{}
+
+// Error implements the error interface.
+func (e ErrServerTransportHeaderNoInterleavedIDs) Error() string {
+	return "transport header does not contain interleaved IDs"
+}
+
+// ErrServerTransportHeaderWrongInterleavedIDs is returned in case the transport header contains wrong interleaved IDs.
+type ErrServerTransportHeaderWrongInterleavedIDs struct {
+	Expected [2]int
+	Value    [2]int
+}
+
+// Error implements the error interface.
+func (e ErrServerTransportHeaderWrongInterleavedIDs) Error() string {
+	return fmt.Sprintf("wrong interleaved IDs, expected %v, got %v", e.Expected, e.Value)
+}
+
+// ErrServerTracksDifferentProtocols is returned in case the client is trying to setup tracks with different protocols.
+type ErrServerTracksDifferentProtocols struct{}
+
+// Error implements the error interface.
+func (e ErrServerTracksDifferentProtocols) Error() string {
+	return "can't setup tracks with different protocols"
+}
+
+// ErrServerNoTracksSetup is returned in case no tracks have been setup.
+type ErrServerNoTracksSetup struct{}
+
+// Error implements the error interface.
+func (e ErrServerNoTracksSetup) Error() string {
+	return "no tracks have been setup"
+}
+
+// ErrServerNotAllAnnouncedTracksSetup is returned in case not all announced tracks have been setup.
+type ErrServerNotAllAnnouncedTracksSetup struct{}
+
+// Error implements the error interface.
+func (e ErrServerNotAllAnnouncedTracksSetup) Error() string {
+	return "not all announced tracks have been setup"
+}
+
+// ErrServerNoUDPPacketsRecently is returned when no UDP packets have been received recently.
+type ErrServerNoUDPPacketsRecently struct{}
+
+// Error implements the error interface.
+func (e ErrServerNoUDPPacketsRecently) Error() string {
+	return "no UDP packets received recently (maybe there's a firewall/NAT in between)"
+}