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authorBjorn Andersson <bjorn.andersson@linaro.org>2017-06-07 14:07:38 -0700
committerDavid S. Miller <davem@davemloft.net>2017-06-08 11:34:57 -0400
commit1784473b242585f407d3e75654d5b06f462a355b (patch)
treec70b725db6818936a335a95948ac2e9a6b92eb42 /net/qrtr
parent8acc8ee465e69ed47bc9cde8d271a1189648d762 (diff)
downloadlinux-stericsson-1784473b242585f407d3e75654d5b06f462a355b.tar.gz
net: qrtr: Broadcast DEL_CLIENT message when endpoint is closed
Per the QMUXv2 protocol specificiation a DEL_CLIENT message should be broadcasted when an endpoint is disconnected. The protocol specification does suggest that the router can keep track of which nodes the endpoint has been communicating with to not wake up sleeping remotes unecessarily, but implementation of this suggestion is left for the future. Cc: Courtney Cavin <ccavin@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/qrtr')
-rw-r--r--net/qrtr/qrtr.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index e8cbab23d667..d7516098b5aa 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -112,6 +112,7 @@ struct qrtr_node {
};
static int qrtr_local_enqueue(struct qrtr_node *node, struct sk_buff *skb);
+static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb);
/* Release node resources and free the node.
*
@@ -312,6 +313,26 @@ static struct sk_buff *qrtr_alloc_local_bye(u32 src_node)
return skb;
}
+static struct sk_buff *qrtr_alloc_del_client(struct sockaddr_qrtr *sq)
+{
+ const int pkt_len = 20;
+ struct sk_buff *skb;
+ __le32 *buf;
+
+ skb = qrtr_alloc_ctrl_packet(QRTR_TYPE_DEL_CLIENT, pkt_len,
+ sq->sq_node, QRTR_NODE_BCAST);
+ if (!skb)
+ return NULL;
+
+ buf = (__le32 *)skb_put(skb, pkt_len);
+ memset(buf, 0, pkt_len);
+ buf[0] = cpu_to_le32(QRTR_TYPE_DEL_CLIENT);
+ buf[1] = cpu_to_le32(sq->sq_node);
+ buf[2] = cpu_to_le32(sq->sq_port);
+
+ return skb;
+}
+
static struct qrtr_sock *qrtr_port_lookup(int port);
static void qrtr_port_put(struct qrtr_sock *ipc);
@@ -448,8 +469,15 @@ static void qrtr_port_put(struct qrtr_sock *ipc)
/* Remove port assignment. */
static void qrtr_port_remove(struct qrtr_sock *ipc)
{
+ struct sk_buff *skb;
int port = ipc->us.sq_port;
+ skb = qrtr_alloc_del_client(&ipc->us);
+ if (skb) {
+ skb_set_owner_w(skb, &ipc->sk);
+ qrtr_bcast_enqueue(NULL, skb);
+ }
+
if (port == QRTR_PORT_CTRL)
port = 0;