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| author | Xin Long <lucien.xin@gmail.com> | 2017-02-08 18:18:19 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-02-09 22:57:38 +0100 |
| commit | 78098117f8bfad4f2104c3f7b6b69071af95a246 (patch) | |
| tree | 44a7411a635afc5a239240458938c667dbff2ade | |
| parent | sctp: implement sender-side procedures for SSN/TSN Reset Request Parameter (diff) | |
| download | linux-78098117f8bfad4f2104c3f7b6b69071af95a246.tar.xz linux-78098117f8bfad4f2104c3f7b6b69071af95a246.zip | |
sctp: add support for generating stream reconf add incoming/outgoing streams request chunk
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@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/sctp.h | 7 | ||||
| -rw-r--r-- | include/net/sctp/sm.h | 3 | ||||
| -rw-r--r-- | net/sctp/sm_make_chunk.c | 46 |
3 files changed, 56 insertions, 0 deletions
diff --git a/include/linux/sctp.h b/include/linux/sctp.h index 71c0d41d9a59..b055788de0cf 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 ac37c1782e23..3675fde3a26e 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 749842aead33..7f8dbf2c6cee 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; +} |