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| author |   Xin Long <lucien.xin@gmail.com> | 2017-12-08 21:04:00 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-12-11 11:23:04 -0500 |
| commit | ad05a7a05ede28ba6dd935d9e932264a22518b1f (patch) | |
| tree | 9a60d1b471879cce652cd1eeae0f0735913aa039 | |
| parent | sctp: add asoc intl_enable negotiation during 4 shakehands (diff) | |
| download | linux-dev-ad05a7a05ede28ba6dd935d9e932264a22518b1f.tar.xz linux-dev-ad05a7a05ede28ba6dd935d9e932264a22518b1f.zip | |
sctp: add basic structures and make chunk function for idata
sctp_idatahdr and sctp_idata_chunk are used to define and parse
I-DATA chunk format, and sctp_make_idata is a function to build
the chunk.
The I-DATA Chunk Format is defined in section 2.1 of RFC8260.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/sctp.h | 17 | ||||
| -rw-r--r-- | include/net/sctp/sm.h | 2 | ||||
| -rw-r--r-- | include/net/sctp/structs.h | 1 | ||||
| -rw-r--r-- | net/sctp/sm_make_chunk.c | 6 |
4 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/sctp.h b/include/linux/sctp.h index 6d2bd64b6ffe..38e2cf66195f 100644 --- a/include/linux/sctp.h +++ b/include/linux/sctp.h @@ -243,6 +243,23 @@ struct sctp_data_chunk { struct sctp_datahdr data_hdr; }; +struct sctp_idatahdr { + __be32 tsn; + __be16 stream; + __be16 reserved; + __be32 mid; + union { + __u32 ppid; + __be32 fsn; + }; + __u8 payload[0]; +}; + +struct sctp_idata_chunk { + struct sctp_chunkhdr chunk_hdr; + struct sctp_idatahdr data_hdr; +}; + /* DATA Chuck Specific Flags */ enum { SCTP_DATA_MIDDLE_FRAG = 0x00, diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h index 70fb397f65b0..5389ae034cfa 100644 --- a/include/net/sctp/sm.h +++ b/include/net/sctp/sm.h @@ -197,6 +197,8 @@ struct sctp_chunk *sctp_make_cookie_ack(const struct sctp_association *asoc, struct sctp_chunk *sctp_make_cwr(const struct sctp_association *asoc, const __u32 lowest_tsn, const struct sctp_chunk *chunk); +struct sctp_chunk *sctp_make_idata(const struct sctp_association *asoc, + __u8 flags, int paylen, gfp_t gfp); struct sctp_chunk *sctp_make_datafrag_empty(struct sctp_association *asoc, const struct sctp_sndrcvinfo *sinfo, int len, const __u8 flags, diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 7030cbe11f45..7026a8039367 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -575,6 +575,7 @@ struct sctp_chunk { struct sctp_addiphdr *addip_hdr; struct sctp_fwdtsn_hdr *fwdtsn_hdr; struct sctp_authhdr *auth_hdr; + struct sctp_idatahdr *idata_hdr; } subh; __u8 *chunk_end; diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c index da33c8550170..b969397fb773 100644 --- a/net/sctp/sm_make_chunk.c +++ b/net/sctp/sm_make_chunk.c @@ -1425,6 +1425,12 @@ static struct sctp_chunk *sctp_make_data(const struct sctp_association *asoc, return _sctp_make_chunk(asoc, SCTP_CID_DATA, flags, paylen, gfp); } +struct sctp_chunk *sctp_make_idata(const struct sctp_association *asoc, + __u8 flags, int paylen, gfp_t gfp) +{ + return _sctp_make_chunk(asoc, SCTP_CID_I_DATA, flags, paylen, gfp); +} + static struct sctp_chunk *sctp_make_control(const struct sctp_association *asoc, __u8 type, __u8 flags, int paylen, gfp_t gfp) |