linux-cp: Linux Interface Mirroring for Control Plane Integration

Type: feature

please see FEATURE.yaml for details.

Signed-off-by: Neale Ranns <nranns@cisco.com>
Signed-off-by: Matthew Smith <mgsmith@netgate.com>
Signed-off-by: Jon Loeliger <jdl@netgate.com>
Signed-off-by: Pim van Pelt <pim@ipng.nl>
Change-Id: I04a45c15c0838906aa787e06660fa29f39f755fa

1 files changed, 85 insertions, 0 deletions

diff --git a/src/plugins/linux-cp/lcp.c b/src/plugins/linux-cp/lcp.c
new file mode 100644
index 00000000000..f4c491c9cb3
--- /dev/null
+++ b/src/plugins/linux-cp/lcp.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * 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.
+ */
+
+#include <sched.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <sys/socket.h>
+#include <net/if.h>
+
+#include <plugins/linux-cp/lcp.h>
+
+lcp_main_t lcp_main;
+
+u8 *
+lcp_get_default_ns (void)
+{
+  lcp_main_t *lcpm = &lcp_main;
+
+  if (lcpm->default_namespace[0] == 0)
+    return 0;
+  return lcpm->default_namespace;
+}
+
+int
+lcp_get_default_ns_fd (void)
+{
+  lcp_main_t *lcpm = &lcp_main;
+
+  return lcpm->default_ns_fd;
+}
+
+/*
+ * ns is expected to be or look like a NUL-terminated C string.
+ */
+int
+lcp_set_default_ns (u8 *ns)
+{
+  lcp_main_t *lcpm = &lcp_main;
+  char *p;
+  int len;
+  u8 *s;
+
+  p = (char *) ns;
+  len = clib_strnlen (p, LCP_NS_LEN);
+  if (len >= LCP_NS_LEN)
+    return -1;
+
+  if (!p || *p == 0)
+    {
+      clib_memset (lcpm->default_namespace, 0,
+		   sizeof (lcpm->default_namespace));
+      if (lcpm->default_ns_fd > 0)
+	close (lcpm->default_ns_fd);
+      lcpm->default_ns_fd = 0;
+      return 0;
+    }
+
+  clib_strncpy ((char *) lcpm->default_namespace, p, LCP_NS_LEN - 1);
+
+  s = format (0, "/var/run/netns/%s%c", (char *) lcpm->default_namespace, 0);
+  lcpm->default_ns_fd = open ((char *) s, O_RDONLY);
+  vec_free (s);
+
+  return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */