SCTP: API to add a sub-connection

This patch adds an API to add a sub-connection following a SRC/DST IP
mapping as required by the RFC4960.
At the same time, it changes the way the next available sub-connection
is being calculated: rather than having an index in the parent
connection which is prone to many issues at run-time, the next available
sub-connection is being calculated by looking at the state of the set
sub-connections and if marked as DOWN it means that is an available slot
to be used.

Change-Id: I662be6a247bfbbe8bf9aaf3f485183c07ef862fe
Signed-off-by: Marco Varlese <marco.varlese@suse.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/src/vnet/sctp/sctp.api b/src/vnet/sctp/sctp.api
new file mode 100644
index 00000000000..f2c48d664f8
--- /dev/null
+++ b/src/vnet/sctp/sctp.api
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2018 SUSE LLC.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+option version = "1.0.0";
+ 
+/** \brief Configure SCTP source addresses, for active-open SCTP sessions
+
+    SCTP src/dst ports are 16 bits
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param is_ipv6 - 1 for ipv6, 0 for ipv4
+    @param vrf_id - fib table / vrf id for local adjacencies
+    @param src_address - src address that SCTP will use for this sub-conn
+    @param dst_address - dst address that SCTP will use for this sub-conn
+*/
+autoreply define sctp_add_src_dst_connection {
+    u32 client_index;
+    u32 context;
+    u8 is_ipv6;
+    u32 vrf_id;
+    u8 src_address[16];
+    u8 dst_address[16];
+ };
+