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RTC: Support ignore padding for RTP header

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This commit is contained in:
winlin 2020-06-27 16:12:08 +08:00
parent 6ff048ed35
commit e9731fe0c1
3 changed files with 13 additions and 10 deletions
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11
trunk/src/app/srs_app_rtc_conn.cpp
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@ -1196,21 +1196,24 @@ srs_error_t SrsRtcPublisher::on_rtp(char* data, int nb_data)
return err;
}
// We must parse the TWCC from RTP header before SRTP unprotect, because:
// 1. Client may send some padding packets with invalid SequenceNumber, which causes the SRTP fail.
// 2. Server may send multiple duplicated NACK to client, and got more than one ARQ packet, which also fail SRTP.
// so, we must parse the header before SRTP unprotect(which may fail and drop packet).
if (0 != twcc_ext_id_) {
SrsBuffer b0(data, nb_data); SrsRtpHeader h0;
h0.set_decode_only_header(true);
h0.ignore_padding(true);
h0.set_extensions(&extension_types_);
if ((err = h0.decode(&b0)) != srs_success) {
return srs_error_wrap(err, "process twcc to decode rtp header");
return srs_error_wrap(err, "twcc decode header");
}
uint16_t twcc_sn = 0;
if ((err = h0.get_twcc_sequence_number(twcc_sn)) == srs_success) {
if((err = on_twcc(twcc_sn)) != srs_success) {
return srs_error_wrap(err, "fail to process twcc packet");
return srs_error_wrap(err, "on twcc");
}
} else {
// TODO: FIXME: process no twcc seq number for audio ssrc
srs_error_reset(err);
}
}