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Commit c56480a1 authored by Xin Long's avatar Xin Long Committed by David S. Miller
Browse files

sctp: add support for generating stream reconf ssn/tsn reset request chunk 



This patch is to define SSN/TSN Reset Request Parameter described
in rfc6525 section 4.3.

Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 119aecba

include/linux/sctp.h

+5 −0
Original line number Diff line number Diff line
@@ -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__ */

include/net/sctp/sm.h

+2 −0
Original line number Diff line number Diff line
@@ -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 *);

net/sctp/sm_make_chunk.c

+29 −0
Original line number Diff line number Diff line
@@ -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;

}