webrtc-srtp 0.3.1

use thiserror::Error;

#[derive(Error, Debug, PartialEq)]
pub enum Error {
    #[error("duplicated packet")]
    ErrDuplicated,
    #[error("SRTP master key is not long enough")]
    ErrShortSrtpMasterKey,
    #[error("SRTP master salt is not long enough")]
    ErrShortSrtpMasterSalt,
    #[error("no such SRTP Profile")]
    ErrNoSuchSrtpProfile,
    #[error("indexOverKdr > 0 is not supported yet")]
    ErrNonZeroKdrNotSupported,
    #[error("exporter called with wrong label")]
    ErrExporterWrongLabel,
    #[error("no config provided")]
    ErrNoConfig,
    #[error("no conn provided")]
    ErrNoConn,
    #[error("failed to verify auth tag")]
    ErrFailedToVerifyAuthTag,
    #[error("packet is too short to be rtcp packet")]
    ErrTooShortRtcp,
    #[error("payload differs")]
    ErrPayloadDiffers,
    #[error("started channel used incorrectly, should only be closed")]
    ErrStartedChannelUsedIncorrectly,
    #[error("stream has not been inited, unable to close")]
    ErrStreamNotInited,
    #[error("stream is already closed")]
    ErrStreamAlreadyClosed,
    #[error("stream is already inited")]
    ErrStreamAlreadyInited,
    #[error("failed to cast child")]
    ErrFailedTypeAssertion,

    #[error("index_over_kdr > 0 is not supported yet")]
    UnsupportedIndexOverKdr,
    #[error("SRTP Master Key must be len {0}, got {1}")]
    SrtpMasterKeyLength(usize, usize),
    #[error("SRTP Salt must be len {0}, got {1}")]
    SrtpSaltLength(usize, usize),
    #[error("SyntaxError: {0}")]
    ExtMapParse(String),
    #[error("ssrc {0} not exist in srtp_ssrc_state")]
    SsrcMissingFromSrtp(u32),
    #[error("srtp ssrc={0} index={1}: duplicated")]
    SrtpSsrcDuplicated(u32, u16),
    #[error("srtcp ssrc={0} index={1}: duplicated")]
    SrtcpSsrcDuplicated(u32, usize),
    #[error("ssrc {0} not exist in srtcp_ssrc_state")]
    SsrcMissingFromSrtcp(u32),
    #[error("Stream with ssrc {0} exists")]
    StreamWithSsrcExists(u32),
    #[error("Session RTP/RTCP type must be same as input buffer")]
    SessionRtpRtcpTypeMismatch,
    #[error("Session EOF")]
    SessionEof,
    #[error("too short SRTP packet: only {0} bytes, expected > {1} bytes")]
    SrtpTooSmall(usize, usize),
    #[error("too short SRTCP packet: only {0} bytes, expected > {1} bytes")]
    SrtcpTooSmall(usize, usize),
    #[error("failed to verify rtp auth tag")]
    RtpFailedToVerifyAuthTag,
    #[error("failed to verify rtcp auth tag")]
    RtcpFailedToVerifyAuthTag,
    #[error("SessionSRTP has been closed")]
    SessionSrtpAlreadyClosed,
    #[error("this stream is not a RTPStream")]
    InvalidRtpStream,
    #[error("this stream is not a RTCPStream")]
    InvalidRtcpStream,

    #[allow(non_camel_case_types)]
    #[error("{0}")]
    new(String),
}

impl Error {
    pub fn equal(&self, err: &anyhow::Error) -> bool {
        err.downcast_ref::<Self>().map_or(false, |e| e == self)
    }
}