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authorXin Long <lucien.xin@gmail.com>2017-02-09 01:18:17 +0800
committerDavid S. Miller <davem@davemloft.net>2017-02-09 16:57:38 -0500
commitc56480a1e90261842f54f3a5a9ebc12d827f0c3e (patch)
tree6484401506f92c5502e3ca4895db3fa7cd9e256b
parent119aecbae57e6f10b85b7cd5e070eef006dbcd74 (diff)
downloadlinux-c56480a1e90261842f54f3a5a9ebc12d827f0c3e.tar.bz2
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: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/sctp.h5
-rw-r--r--include/net/sctp/sm.h2
-rw-r--r--net/sctp/sm_make_chunk.c29
3 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index d74fca3f3141..71c0d41d9a59 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 430ed139fbbb..ac37c1782e23 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 c7d3249f88ec..749842aead33 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;
+}