On Thu, Feb 09, 2017 at 01:18:17AM +0800, Xin Long wrote:
> This patch is to define SSN/TSN Reset Request Parameter described
> in rfc6525 section 4.3.
>
> It's also to drop some unnecessary __packed in include/linux/sctp.h.
Oups, extra line in the changelog here.
>
> Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
> ---
> include/linux/sctp.h | 5 +++++
> include/net/sctp/sm.h | 2 ++
> net/sctp/sm_make_chunk.c | 29 +++++++++++++++++++++++++++++
> 3 files changed, 36 insertions(+)
>
> diff --git a/include/linux/sctp.h b/include/linux/sctp.h
> index d74fca3..71c0d41 100644
> --- a/include/linux/sctp.h
> +++ b/include/linux/sctp.h
> @@ -737,4 +737,9 @@ struct sctp_strreset_inreq {
> __u16 list_of_streams[0];
> };
>
> +struct sctp_strreset_tsnreq {
> + sctp_paramhdr_t param_hdr;
> + __u32 request_seq;
> +};
> +
> #endif /* __LINUX_SCTP_H__ */
> diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
> index 430ed13..ac37c17 100644
> --- a/include/net/sctp/sm.h
> +++ b/include/net/sctp/sm.h
> @@ -265,6 +265,8 @@ struct sctp_chunk *sctp_make_strreset_req(
> const struct sctp_association *asoc,
> __u16 stream_num, __u16 *stream_list,
> bool out, bool in);
> +struct sctp_chunk *sctp_make_strreset_tsnreq(
> + const struct sctp_association *asoc);
> void sctp_chunk_assign_tsn(struct sctp_chunk *);
> void sctp_chunk_assign_ssn(struct sctp_chunk *);
>
> diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
> index c7d3249..749842a 100644
> --- a/net/sctp/sm_make_chunk.c
> +++ b/net/sctp/sm_make_chunk.c
> @@ -3658,3 +3658,32 @@ struct sctp_chunk *sctp_make_strreset_req(
>
> return retval;
> }
> +
> +/* RE-CONFIG 4.3 (SSN/TSN RESET ALL)
> + * 0 1 2 3
> + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
> + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> + * | Parameter Type = 15 | Parameter Length = 8 |
> + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> + * | Re-configuration Request Sequence Number |
> + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> + */
> +struct sctp_chunk *sctp_make_strreset_tsnreq(
> + const struct sctp_association *asoc)
> +{
> + struct sctp_strreset_tsnreq tsnreq;
> + __u16 length = sizeof(tsnreq);
> + struct sctp_chunk *retval;
> +
> + retval = sctp_make_reconf(asoc, length);
> + if (!retval)
> + return NULL;
> +
> + tsnreq.param_hdr.type = SCTP_PARAM_RESET_TSN_REQUEST;
> + tsnreq.param_hdr.length = htons(length);
> + tsnreq.request_seq = htonl(asoc->strreset_outseq);
> +
> + sctp_addto_chunk(retval, sizeof(tsnreq), &tsnreq);
> +
> + return retval;
> +}
> --
> 2.1.0
>
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