Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 198 insertions, 0 deletions

diff --git a/vrrpd/vrrp_zebra.c b/vrrpd/vrrp_zebra.c
new file mode 100644
index 0000000..6d753d2
--- /dev/null
+++ b/vrrpd/vrrp_zebra.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * VRRP Zebra interfacing.
+ * Copyright (C) 2018-2019 Cumulus Networks, Inc.
+ * Quentin Young
+ */
+#include <zebra.h>
+
+#include "lib/if.h"
+#include "lib/linklist.h"
+#include "lib/log.h"
+#include "lib/prefix.h"
+#include "lib/vty.h"
+#include "lib/zclient.h"
+
+#include "vrrp.h"
+#include "vrrp_debug.h"
+#include "vrrp_zebra.h"
+
+#define VRRP_LOGPFX "[ZEBRA] "
+
+static struct zclient *zclient;
+
+static void vrrp_zebra_debug_if_state(struct interface *ifp, const char *func)
+{
+	DEBUGD(&vrrp_dbg_zebra,
+	       "%s: %s index %d vrf %s(%u) parent %d mac %02x:%02x:%02x:%02x:%02x:%02x flags %ld metric %d mtu %d operative %d",
+	       func, ifp->name, ifp->ifindex, ifp->vrf->name, ifp->vrf->vrf_id,
+	       ifp->link_ifindex, ifp->hw_addr[0], ifp->hw_addr[1],
+	       ifp->hw_addr[2], ifp->hw_addr[3], ifp->hw_addr[4],
+	       ifp->hw_addr[5], (long)ifp->flags, ifp->metric, ifp->mtu,
+	       if_is_operative(ifp));
+}
+
+static void vrrp_zebra_debug_if_dump_address(struct interface *ifp,
+					     const char *func)
+{
+	struct connected *ifc;
+	struct listnode *node;
+
+	DEBUGD(&vrrp_dbg_zebra, "%s: interface %s addresses:", func, ifp->name);
+
+	for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
+		struct prefix *p = ifc->address;
+
+		DEBUGD(&vrrp_dbg_zebra, "%s: interface %s address %pFX %s",
+		       func, ifp->name, p,
+		       CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? "secondary"
+								   : "primary");
+	}
+}
+
+
+static void vrrp_zebra_connected(struct zclient *zclient)
+{
+	zclient_send_reg_requests(zclient, VRF_DEFAULT);
+}
+
+/* Router-id update message from zebra. */
+static int vrrp_router_id_update_zebra(int command, struct zclient *zclient,
+				       zebra_size_t length, vrf_id_t vrf_id)
+{
+	struct prefix router_id;
+
+	zebra_router_id_update_read(zclient->ibuf, &router_id);
+
+	return 0;
+}
+
+int vrrp_ifp_create(struct interface *ifp)
+{
+	vrrp_zebra_debug_if_state(ifp, __func__);
+
+	vrrp_if_add(ifp);
+
+	return 0;
+}
+
+int vrrp_ifp_destroy(struct interface *ifp)
+{
+	vrrp_zebra_debug_if_state(ifp, __func__);
+
+	vrrp_if_del(ifp);
+
+	return 0;
+}
+
+int vrrp_ifp_up(struct interface *ifp)
+{
+	vrrp_zebra_debug_if_state(ifp, __func__);
+
+	vrrp_if_up(ifp);
+
+	return 0;
+}
+
+int vrrp_ifp_down(struct interface *ifp)
+{
+	vrrp_zebra_debug_if_state(ifp, __func__);
+
+	vrrp_if_down(ifp);
+
+	return 0;
+}
+
+static int vrrp_zebra_if_address_add(int command, struct zclient *zclient,
+				     zebra_size_t length, vrf_id_t vrf_id)
+{
+	struct connected *c;
+
+	/*
+	 * zebra api notifies address adds/dels events by using the same call
+	 * interface_add_read below, see comments in lib/zclient.c
+	 *
+	 * zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, ...)
+	 * will add address to interface list by calling
+	 * connected_add_by_prefix()
+	 */
+	c = zebra_interface_address_read(command, zclient->ibuf, vrf_id);
+
+	if (!c)
+		return 0;
+
+	vrrp_zebra_debug_if_state(c->ifp, __func__);
+	vrrp_zebra_debug_if_dump_address(c->ifp, __func__);
+
+	vrrp_if_address_add(c->ifp);
+
+	return 0;
+}
+
+static int vrrp_zebra_if_address_del(int command, struct zclient *client,
+				     zebra_size_t length, vrf_id_t vrf_id)
+{
+	struct connected *c;
+
+	/*
+	 * zebra api notifies address adds/dels events by using the same call
+	 * interface_add_read below, see comments in lib/zclient.c
+	 *
+	 * zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...)
+	 * will remove address from interface list by calling
+	 * connected_delete_by_prefix()
+	 */
+	c = zebra_interface_address_read(command, client->ibuf, vrf_id);
+
+	if (!c)
+		return 0;
+
+	vrrp_zebra_debug_if_state(c->ifp, __func__);
+	vrrp_zebra_debug_if_dump_address(c->ifp, __func__);
+
+	vrrp_if_address_del(c->ifp);
+
+	return 0;
+}
+
+void vrrp_zebra_radv_set(struct vrrp_router *r, bool enable)
+{
+	DEBUGD(&vrrp_dbg_zebra,
+	       VRRP_LOGPFX VRRP_LOGPFX_VRID
+	       "Requesting Zebra to turn router advertisements %s for %s",
+	       r->vr->vrid, enable ? "on" : "off", r->mvl_ifp->name);
+
+	zclient_send_interface_radv_req(zclient, r->mvl_ifp->vrf->vrf_id,
+					r->mvl_ifp, enable, VRRP_RADV_INT);
+}
+
+void vrrp_zclient_send_interface_protodown(struct interface *ifp, bool down)
+{
+	DEBUGD(&vrrp_dbg_zebra,
+	       VRRP_LOGPFX "Requesting Zebra to set %s protodown %s", ifp->name,
+	       down ? "on" : "off");
+
+	zclient_send_interface_protodown(zclient, ifp->vrf->vrf_id, ifp, down);
+}
+
+static zclient_handler *const vrrp_handlers[] = {
+	[ZEBRA_ROUTER_ID_UPDATE] = vrrp_router_id_update_zebra,
+	[ZEBRA_INTERFACE_ADDRESS_ADD] = vrrp_zebra_if_address_add,
+	[ZEBRA_INTERFACE_ADDRESS_DELETE] = vrrp_zebra_if_address_del,
+};
+
+void vrrp_zebra_init(void)
+{
+	if_zapi_callbacks(vrrp_ifp_create, vrrp_ifp_up,
+			  vrrp_ifp_down, vrrp_ifp_destroy);
+
+	/* Socket for receiving updates from Zebra daemon */
+	zclient = zclient_new(master, &zclient_options_default, vrrp_handlers,
+			      array_size(vrrp_handlers));
+
+	zclient->zebra_connected = vrrp_zebra_connected;
+
+	zclient_init(zclient, ZEBRA_ROUTE_VRRP, 0, &vrrp_privs);
+
+	zlog_notice("%s: zclient socket initialized", __func__);
+}