1 files changed, 69 insertions, 0 deletions
diff --git a/zebra/tc_netlink.h b/zebra/tc_netlink.h
new file mode 100644
index 0000000..5e95e6c
--- /dev/null
+++ b/zebra/tc_netlink.h
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Zebra Traffic Control (TC) interaction with the kernel using netlink.
+ *
+ * Copyright (C) 2022 Shichu Yang
+ */
+
+#ifndef _ZEBRA_TC_NETLINK_H
+#define _ZEBRA_TC_NETLINK_H
+
+#ifdef HAVE_NETLINK
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Represent a prefixed address in flower filter */
+
+struct inet_prefix {
+	uint16_t flags;
+	uint16_t bytelen;
+	uint16_t bitlen;
+	uint16_t family;
+	uint32_t data[64];
+};
+
+enum {
+	PREFIXLEN_SPECIFIED = (1 << 0),
+	ADDRTYPE_INET = (1 << 1),
+	ADDRTYPE_UNSPEC = (1 << 2),
+	ADDRTYPE_MULTI = (1 << 3),
+
+	ADDRTYPE_INET_UNSPEC = ADDRTYPE_INET | ADDRTYPE_UNSPEC,
+	ADDRTYPE_INET_MULTI = ADDRTYPE_INET | ADDRTYPE_MULTI
+};
+
+extern enum netlink_msg_status
+netlink_put_tc_qdisc_update_msg(struct nl_batch *bth,
+				struct zebra_dplane_ctx *ctx);
+extern enum netlink_msg_status
+netlink_put_tc_class_update_msg(struct nl_batch *bth,
+				struct zebra_dplane_ctx *ctx);
+extern enum netlink_msg_status
+netlink_put_tc_filter_update_msg(struct nl_batch *bth,
+				 struct zebra_dplane_ctx *ctx);
+
+/**
+ * "filter" & "class" in the following become "tfilter" & "tclass" for
+ * the sake of consistency with kernel message types (RTM_NEWTFILTER etc.)
+ */
+
+extern int netlink_qdisc_read(struct zebra_ns *zns);
+extern int netlink_tfilter_read_for_interface(struct zebra_ns *zns,
+					      ifindex_t ifindex);
+
+extern int netlink_tfilter_change(struct nlmsghdr *h, ns_id_t ns_id,
+				  int startup);
+extern int netlink_tclass_change(struct nlmsghdr *h, ns_id_t ns_id,
+				 int startup);
+extern int netlink_qdisc_change(struct nlmsghdr *h, ns_id_t ns_id, int startup);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAVE_NETLINK */
+
+#endif /* _ZEBRA_TC_NETLINK_H */