sctp: send abort chunk when max_retrans exceeded

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / sctp / sm_make_chunk.c

diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index fbe1636309a75ac054de225fe4d1cf245a3923d2..e0f01a4e8cd6adde26bb66d1f9abaf8955c86daf 100644 (file)
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1090,6 +1090,25 @@ nodata:
        return retval;
 }
 
+struct sctp_chunk *sctp_make_violation_max_retrans(
+       const struct sctp_association *asoc,
+       const struct sctp_chunk *chunk)
+{
+       struct sctp_chunk *retval;
+       static const char error[] = "Association exceeded its max_retans count";
+       size_t payload_len = sizeof(error) + sizeof(sctp_errhdr_t);
+
+       retval = sctp_make_abort(asoc, chunk, payload_len);
+       if (!retval)
+               goto nodata;
+
+       sctp_init_cause(retval, SCTP_ERROR_PROTO_VIOLATION, sizeof(error));
+       sctp_addto_chunk(retval, sizeof(error), error);
+
+nodata:
+       return retval;
+}
+
 /* Make a HEARTBEAT chunk.  */
 struct sctp_chunk *sctp_make_heartbeat(const struct sctp_association *asoc,
                                  const struct sctp_transport *transport)