1 files changed, 38 insertions, 0 deletions
diff --git a/src/n-dhcp4/src/util/link.h b/src/n-dhcp4/src/util/link.h
new file mode 100644
index 00000000..cd0ad6f8
--- /dev/null
+++ b/src/n-dhcp4/src/util/link.h
@@ -0,0 +1,38 @@
+#pragma once
+
+/*
+ * Link Management
+ *
+ * This utility provides easy access to network links. It is meant for testing
+ * purposes only and relies on call-outs to ip(1). A proper implementation
+ * should rather use netlink directly to interact with the kernel.
+ *
+ * Furthermore, for simplification this is limited to ethernet links.
+ */
+
+#include <c-stdaux.h>
+#include <net/ethernet.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+
+typedef struct Link Link;
+
+struct Link {
+        int netns;
+        int ifindex;
+        struct ether_addr mac;
+};
+
+#define LINK_NULL(_x) {                                                         \
+                .netns = -1,                                                    \
+        }
+
+void link_deinit(Link *link);
+
+void link_new_veth(Link *veth_parentp, Link *veth_childp, int netns_parent, int netns_child);
+void link_new_bridge(Link *bridgep, int netns);
+
+void link_add_ip4(Link *link, const struct in_addr *addr, unsigned int prefix);
+void link_del_ip4(Link *link, const struct in_addr *addr, unsigned int prefix);
+void link_set_master(Link *link, int if_master);
+void link_socket(Link *link, int *socketp, int family, int type);