m2ua: Print information about number of SCTP connections

It appears that it is possible to have a stale SCTP connection
and this added LOGL_NOTICE and the VTY interface might help to
identify this situation in the future (the mean time of failure
is about five month).

1 files changed, 17 insertions, 1 deletions

diff --git a/src/sctp_m2ua.c b/src/sctp_m2ua.c
index 017f65e..cdcf8cf 100644
--- a/src/sctp_m2ua.c
+++ b/src/sctp_m2ua.c
@@ -32,6 +32,18 @@
 
 #define SCTP_PPID_M2UA 2
 
+
+int sctp_m2ua_conn_count(struct sctp_m2ua_transport *trans)
+{
+	int count = 0;
+	struct sctp_m2ua_conn *conn;
+
+	llist_for_each_entry(conn, &trans->conns, entry)
+		count += 1;
+
+	return count;
+}
+
 static struct mtp_m2ua_link *find_m2ua_link(struct sctp_m2ua_transport *trans, int link_index)
 {
 	struct mtp_m2ua_link *link;
@@ -650,7 +662,7 @@ static int sctp_trans_accept(struct osmo_fd *fd, unsigned int what)
 	struct sctp_m2ua_conn *conn;
 	struct sockaddr_in addr;
 	socklen_t len;
-	int s, ret;
+	int s, ret, count;
 
 	len = sizeof(addr);
 	s = accept(fd->fd, (struct sockaddr *) &addr, &len);
@@ -700,6 +712,10 @@ static int sctp_trans_accept(struct osmo_fd *fd, unsigned int what)
 	}
 
 	llist_add_tail(&conn->entry, &trans->conns);
+
+
+	count = sctp_m2ua_conn_count(trans);
+	LOGP(DINP, LOGL_NOTICE, "Now having %d SCTP connection(s).\n", count);
 	return 0;
 }