sctp_server: add type hints

Change-Id: I0ddeccb81c52f1769fa0754c5628b53b1c9feb81
---
M src/sctp_server.erl
1 file changed, 12 insertions(+), 2 deletions(-)


git pull ssh://gerrit.osmocom.org:29418/erlang/osmo-s1gw refs/changes/84/38784/1

diff --git a/src/sctp_server.erl b/src/sctp_server.erl
index 58d91ca..9de56f1 100644
--- a/src/sctp_server.erl
+++ b/src/sctp_server.erl
@@ -51,8 +51,18 @@
 -include("s1gw_metrics.hrl").
 -include("s1ap.hrl").
 
--record(server_state, {sock, clients, mme_addr_port}).
--record(client_state, {addr_port, pid}).
+-type addr_port() :: {inet:ip_address(),
+                      inet:port_number()}.
+
+-record(server_state, {sock :: gen_sctp:sctp_socket(),
+                       clients :: dict:dict(),
+                       mme_addr_port :: term()
+                      }).
+
+-record(client_state, {addr_port :: addr_port(),
+                       pid :: pid()
+                      }).
+
 
 %% ------------------------------------------------------------------
 %% public API

