This patch is to implement Receiver-Side Procedures for the Incoming
SSN Reset Request Parameter described in rfc6525 section 5.2.3.
It's also to move str_list endian conversion out of sctp_make_strreset_req,
so that sctp_make_strreset_req can be used more conveniently to process
inreq.
Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
---
include/net/sctp/sm.h | 4 +++
net/sctp/sm_make_chunk.c | 8 +-----
net/sctp/stream.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 75 insertions(+), 7 deletions(-)
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index c0f9bea..f6a828d 100644
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -285,6 +285,10 @@ struct sctp_chunk *sctp_process_strreset_outreq(
struct sctp_association *asoc,
union sctp_params param,
struct sctp_ulpevent **evp);
+struct sctp_chunk *sctp_process_strreset_inreq(
+ struct sctp_association *asoc,
+ union sctp_params param,
+ struct sctp_ulpevent **evp);
/* Prototypes for statetable processing. */
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 9680c58..60d9fdc 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -3617,7 +3617,7 @@ struct sctp_chunk *sctp_make_strreset_req(
__u16 stream_len = stream_num * 2;
struct sctp_strreset_inreq inreq;
struct sctp_chunk *retval;
- __u16 outlen, inlen, i;
+ __u16 outlen, inlen;
outlen = (sizeof(outreq) + stream_len) * out;
inlen = (sizeof(inreq) + stream_len) * in;
@@ -3626,9 +3626,6 @@ struct sctp_chunk *sctp_make_strreset_req(
if (!retval)
return NULL;
- for (i = 0; i < stream_num; i++)
- stream_list[i] = htons(stream_list[i]);
-
if (outlen) {
outreq.param_hdr.type = SCTP_PARAM_RESET_OUT_REQUEST;
outreq.param_hdr.length = htons(outlen);
@@ -3653,9 +3650,6 @@ struct sctp_chunk *sctp_make_strreset_req(
sctp_addto_chunk(retval, stream_len, stream_list);
}
- for (i = 0; i < stream_num; i++)
- stream_list[i] = ntohs(stream_list[i]);
-
return retval;
}
diff --git a/net/sctp/stream.c b/net/sctp/stream.c
index 531fcc4..1c6cc04 100644
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -135,7 +135,14 @@ int sctp_send_reset_streams(struct sctp_association *asoc,
if (str_list[i] >= stream->incnt)
goto out;
+ for (i = 0; i < str_nums; i++)
+ str_list[i] = htons(str_list[i]);
+
chunk = sctp_make_strreset_req(asoc, str_nums, str_list, out, in);
+
+ for (i = 0; i < str_nums; i++)
+ str_list[i] = ntohs(str_list[i]);
+
if (!chunk) {
retval = -ENOMEM;
goto out;
@@ -407,3 +414,66 @@ struct sctp_chunk *sctp_process_strreset_outreq(
out:
return sctp_make_strreset_resp(asoc, result, request_seq);
}
+
+struct sctp_chunk *sctp_process_strreset_inreq(
+ struct sctp_association *asoc,
+ union sctp_params param,
+ struct sctp_ulpevent **evp)
+{
+ struct sctp_strreset_inreq *inreq = param.v;
+ struct sctp_stream *stream = asoc->stream;
+ __u32 result = SCTP_STRRESET_DENIED;
+ struct sctp_chunk *chunk = NULL;
+ __u16 i, nums, *str_p;
+ __u32 request_seq;
+
+ request_seq = ntohl(inreq->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_RESET_STREAM_REQ))
+ goto out;
+
+ if (asoc->strreset_outstanding) {
+ result = SCTP_STRRESET_ERR_IN_PROGRESS;
+ goto out;
+ }
+
+ nums = (ntohs(param.p->length) - sizeof(*inreq)) / 2;
+ str_p = inreq->list_of_streams;
+ for (i = 0; i < nums; i++) {
+ if (ntohs(str_p[i]) >= stream->outcnt) {
+ result = SCTP_STRRESET_ERR_WRONG_SSN;
+ goto out;
+ }
+ }
+
+ chunk = sctp_make_strreset_req(asoc, nums, str_p, 1, 0);
+ if (!chunk)
+ goto out;
+
+ if (nums)
+ for (i = 0; i < nums; i++)
+ stream->out[ntohs(str_p[i])].state =
+ SCTP_STREAM_CLOSED;
+ else
+ for (i = 0; i < stream->outcnt; i++)
+ stream->out[i].state = SCTP_STREAM_CLOSED;
+
+ asoc->strreset_chunk = chunk;
+ asoc->strreset_outstanding = 1;
+ sctp_chunk_hold(asoc->strreset_chunk);
+
+ *evp = sctp_ulpevent_make_stream_reset_event(asoc,
+ SCTP_STREAM_RESET_INCOMING_SSN, nums, str_p, GFP_ATOMIC);
+
+out:
+ if (!chunk)
+ chunk = sctp_make_strreset_resp(asoc, result, request_seq);
+
+ return chunk;
+}
--
2.1.0
--
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