From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xin Long Subject: [PATCHv6 net-next 5/6] sctp: add support for generating stream reconf add incoming/outgoing streams request chunk Date: Thu, 9 Feb 2017 01:18:19 +0800 Message-ID: <2664f74a3821c493b1b8beea4bc5c4077e994243.1486573728.git.lucien.xin@gmail.com> References: <5f2d5aa54716217f68f724e4165289bd964b8755.1486573728.git.lucien.xin@gmail.com> <3d1180fcc5c72dea7d6cb7c7fafae4c4a7782cb3.1486573728.git.lucien.xin@gmail.com> <376d8794b81d7c5efe02b588ca381b88ed5f05ad.1486573728.git.lucien.xin@gmail.com> <7095f88e0d93a7189df08fec56b3db89deb0397c.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-f196.google.com ([209.85.192.196]:36042 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932551AbdBHRUM (ORCPT ); Wed, 8 Feb 2017 12:20:12 -0500 In-Reply-To: <7095f88e0d93a7189df08fec56b3db89deb0397c.1486573728.git.lucien.xin@gmail.com> In-Reply-To: References: Sender: netdev-owner@vger.kernel.org List-ID: 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 --- 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