From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xin Long Subject: [PATCHv6 net-next 3/6] sctp: add support for generating stream reconf ssn/tsn reset request chunk Date: Thu, 9 Feb 2017 01:18:17 +0800 Message-ID: <376d8794b81d7c5efe02b588ca381b88ed5f05ad.1486573728.git.lucien.xin@gmail.com> References: <5f2d5aa54716217f68f724e4165289bd964b8755.1486573728.git.lucien.xin@gmail.com> <3d1180fcc5c72dea7d6cb7c7fafae4c4a7782cb3.1486573728.git.lucien.xin@gmail.com> Cc: Marcelo Ricardo Leitner , Neil Horman , Vlad Yasevich , davem@davemloft.net To: network dev , linux-sctp@vger.kernel.org Return-path: Received: from mail-pf0-f193.google.com ([209.85.192.193]:32881 "EHLO mail-pf0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754451AbdBHRUL (ORCPT ); Wed, 8 Feb 2017 12:20:11 -0500 In-Reply-To: <3d1180fcc5c72dea7d6cb7c7fafae4c4a7782cb3.1486573728.git.lucien.xin@gmail.com> In-Reply-To: References: Sender: netdev-owner@vger.kernel.org List-ID: 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. Signed-off-by: Xin Long --- 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