On Thu, Feb 09, 2017 at 01:18:19AM +0800, Xin Long wrote:
> This patch is to define Add Incoming/Outgoing Streams Request
> Parameter described in rfc6525 section 4.5 and 4.6. They can
> be in one same chunk trunk as rfc6525 section 3.1-7 describes,
> so make them in one function.
>
> Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
> ---
> include/linux/sctp.h | 7 +++++++
> include/net/sctp/sm.h | 3 +++
> net/sctp/sm_make_chunk.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 56 insertions(+)
>
> diff --git a/include/linux/sctp.h b/include/linux/sctp.h
> index 71c0d41..b055788 100644
> --- a/include/linux/sctp.h
> +++ b/include/linux/sctp.h
> @@ -742,4 +742,11 @@ struct sctp_strreset_tsnreq {
> __u32 request_seq;
> };
>
> +struct sctp_strreset_addstrm {
> + sctp_paramhdr_t param_hdr;
> + __u32 request_seq;
> + __u16 number_of_streams;
> + __u16 reserved;
> +};
> +
> #endif /* __LINUX_SCTP_H__ */
> diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
> index ac37c17..3675fde 100644
> --- a/include/net/sctp/sm.h
> +++ b/include/net/sctp/sm.h
> @@ -267,6 +267,9 @@ struct sctp_chunk *sctp_make_strreset_req(
> bool out, bool in);
> struct sctp_chunk *sctp_make_strreset_tsnreq(
> const struct sctp_association *asoc);
> +struct sctp_chunk *sctp_make_strreset_addstrm(
> + const struct sctp_association *asoc,
> + __u16 out, __u16 in);
> 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 749842a..7f8dbf2 100644
> --- a/net/sctp/sm_make_chunk.c
> +++ b/net/sctp/sm_make_chunk.c
> @@ -3687,3 +3687,49 @@ struct sctp_chunk *sctp_make_strreset_tsnreq(
>
> return retval;
> }
> +
> +/* RE-CONFIG 4.5/4.6 (ADD STREAM)
> + * 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 = 17 | Parameter Length = 12 |
> + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> + * | Re-configuration Request Sequence Number |
> + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> + * | Number of new streams | Reserved |
> + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> + */
> +struct sctp_chunk *sctp_make_strreset_addstrm(
> + const struct sctp_association *asoc,
> + __u16 out, __u16 in)
> +{
> + struct sctp_strreset_addstrm addstrm;
> + __u16 size = sizeof(addstrm);
> + struct sctp_chunk *retval;
> +
> + retval = sctp_make_reconf(asoc, (!!out + !!in) * size);
> + if (!retval)
> + return NULL;
> +
> + if (out) {
> + addstrm.param_hdr.type = SCTP_PARAM_RESET_ADD_OUT_STREAMS;
> + addstrm.param_hdr.length = htons(size);
> + addstrm.number_of_streams = htons(out);
> + addstrm.request_seq = htonl(asoc->strreset_outseq);
> + addstrm.reserved = 0;
> +
> + sctp_addto_chunk(retval, size, &addstrm);
> + }
> +
> + if (in) {
> + addstrm.param_hdr.type = SCTP_PARAM_RESET_ADD_IN_STREAMS;
> + addstrm.param_hdr.length = htons(size);
> + addstrm.number_of_streams = htons(in);
> + addstrm.request_seq = htonl(asoc->strreset_outseq + !!out);
> + addstrm.reserved = 0;
> +
> + sctp_addto_chunk(retval, size, &addstrm);
> + }
> +
> + return retval;
> +}
> --
> 2.1.0
>
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