• Xin Long's avatar
    sctp: implement assign_number for sctp_stream_interleave · 668c9beb
    Xin Long authored
    assign_number is added as a member of sctp_stream_interleave, used
    to assign ssn for data or mid (message id) for idata, called in
    sctp_packet_append_data. sctp_chunk_assign_ssn is left as it is,
    and sctp_chunk_assign_mid is added for sctp_stream_interleave_1.
    
    This procedure is described in section 2.2.2 of RFC8260.
    
    All sizeof(struct sctp_data_chunk) in tx path is replaced with
    sctp_datachk_len, to make it right for idata as well. And also
    adjust sctp_chunk_is_data for SCTP_CID_I_DATA.
    
    After this patch, idata can be built and sent in tx path.
    
    Note that if sp strm_interleave is set, it has to wait_connect in
    sctp_sendmsg, as asoc intl_enable need to be known after 4 shake-
    hands, to decide if it should use data or idata later. data and
    idata can't be mixed to send in one asoc.
    Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
    Acked-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
    Acked-by: default avatarNeil Horman <nhorman@tuxdriver.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    668c9beb
sm.h 16 KB