[Linuxptp-devel] [PATCH v3 3/4] port: unicast client - do not add master to foreign master table if not in the unicast master table.

[vincent.cheng.xh]

From: Vincent Cheng <vincent.cheng...@renesas.com>

Signed-off-by: Vincent Cheng <vincent.cheng...@renesas.com>
Reviewed-by: Jacob Keller <jacob.e.kel...@intel.com>

v1->v2: new
v2->v3: Remove unrelated white space change.
---
 port.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/port.c b/port.c
index f2b666c..6e0fdda 100644
--- a/port.c
+++ b/port.c
@@ -167,6 +167,27 @@ static int msg_source_equal(struct ptp_message *m1, struct 
foreign_clock *fc)
        return 0 == memcmp(id1, id2, sizeof(*id1));
 }
 
+static int port_unicast_message_valid(struct port *p, struct ptp_message *m)
+{
+       struct unicast_master_address master;
+
+       if (!unicast_client_msg_is_from_master_table_entry(p, m)) {
+               memset(&master, 0, sizeof(master));
+               master.address = m->address;
+               master.portIdentity = m->header.sourcePortIdentity;
+
+               pr_warning("%s: new foreign master %s not in unicast master 
table",
+                          p->log_name, pid2str(&m->header.sourcePortIdentity));
+
+               if (unicast_client_tx_cancel(p, &master)) {
+                       pr_warning("%s: cancel unicast transmission to %s 
failed",
+                                  p->log_name, 
pid2str(&m->header.sourcePortIdentity));
+               }
+               return 0;
+       }
+       return 1;
+}
+
 int source_pid_eq(struct ptp_message *m1, struct ptp_message *m2)
 {
        return pid_eq(&m1->header.sourcePortIdentity,
@@ -351,6 +372,11 @@ static int add_foreign_master(struct port *p, struct 
ptp_message *m)
                }
        }
        if (!fc) {
+               if (unicast_client_enabled(p)) {
+                       if (!port_unicast_message_valid(p, m)) {
+                               return 0;
+                       }
+               }
                pr_notice("%s: new foreign master %s", p->log_name,
                        pid2str(&m->header.sourcePortIdentity));
 
-- 
2.34.1



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