This patch is to implement Receiver-Side Procedures for the Add Incoming
Streams Request Parameter described in section 5.2.6.
Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
---
include/net/sctp/sm.h | 4 ++++
net/sctp/stream.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 63 insertions(+)
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index 5624b52..b8ca767 100644
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -297,6 +297,10 @@ struct sctp_chunk *sctp_process_strreset_addstrm_out(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp);
+struct sctp_chunk *sctp_process_strreset_addstrm_in(
+ struct sctp_association *asoc,
+ union sctp_params param,
+ struct sctp_ulpevent **evp);
/* Prototypes for statetable processing. */
diff --git a/net/sctp/stream.c b/net/sctp/stream.c
index b51a037..a2b248b 100644
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -339,3 +339,62 @@ struct sctp_chunk *sctp_process_strreset_addstrm_out(
out:
return sctp_make_strreset_resp(asoc, result, request_seq);
}
+
+struct sctp_chunk *sctp_process_strreset_addstrm_in(
+ struct sctp_association *asoc,
+ union sctp_params param,
+ struct sctp_ulpevent **evp)
+{
+ struct sctp_strreset_addstrm *addstrm = param.v;
+ __u32 result = SCTP_STRRESET_DENIED;
+ __u32 request_seq;
+ __u16 i, nums;
+
+ request_seq = ntohl(addstrm->request_seq);
+ if (request_seq > asoc->strreset_inseq) {
+ result = SCTP_STRRESET_ERR_BAD_SEQNO;
+ goto out;
+ } else if (request_seq == asoc->strreset_inseq) {
+ asoc->strreset_inseq++;
+ }
+
+ if (!(asoc->strreset_enable & SCTP_ENABLE_CHANGE_ASSOC_REQ))
+ goto out;
+
+ if (asoc->strreset_outstanding) {
+ result = SCTP_STRRESET_ERR_IN_PROGRESS;
+ goto out;
+ }
+
+ nums = ntohs(addstrm->number_of_streams);
+ if (!nums || nums + asoc->streamoutcnt > SCTP_MAX_STREAM)
+ goto out;
+
+ nums = nums + asoc->streamoutcnt;
+ if (ksize(asoc->streamout) / sizeof(*asoc->streamout) < nums) {
+ struct sctp_stream_out *streamout;
+
+ streamout = kcalloc(nums, sizeof(*streamout), GFP_ATOMIC);
+ if (!streamout)
+ goto out;
+
+ memcpy(streamout, asoc->streamout,
+ sizeof(*streamout) * asoc->streamoutcnt);
+
+ kfree(asoc->streamout);
+ asoc->streamout = streamout;
+ }
+
+ for (i = asoc->streamoutcnt; i < nums; i++)
+ asoc->streamout[i].state = SCTP_STREAM_OPEN;
+
+ asoc->streamoutcnt = nums;
+
+ result = SCTP_STRRESET_PERFORMED;
+
+ *evp = sctp_ulpevent_make_stream_change_event(asoc,
+ 0, 0, ntohs(addstrm->number_of_streams), GFP_ATOMIC);
+
+out:
+ return sctp_make_strreset_resp(asoc, result, request_seq);
+}
--
2.1.0
--
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