/*
- * Zebra interfacing
- * Copyright (C) 2018 Cumulus Networks, Inc.
- * Quentin Young
+ * VRRP Zebra interfacing.
+ * Copyright (C) 2018-2019 Cumulus Networks, Inc.
+ * Quentin Young
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
*/
#include <zebra.h>
-#include "zclient.h"
-#include "thread.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"
-/* Zebra structure to hold current status. */
-struct thread_master *master;
-struct zclient *zclient;
+#define VRRP_LOGPFX "[ZEBRA] "
-void vrrp_zebra_init(void)
+static struct zclient *zclient;
+
+static void vrrp_zebra_debug_if_state(struct interface *ifp, vrf_id_t vrf_id,
+ const char *func)
+{
+ DEBUGD(&vrrp_dbg_zebra,
+ "%s: %s index %d(%u) parent %d mac %02x:%02x:%02x:%02x:%02x:%02x flags %ld metric %d mtu %d operative %d",
+ func, ifp->name, vrf_id, ifp->link_ifindex, ifp->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 %s %s", func,
+ ifp->name, inet_ntoa(p->u.prefix4),
+ 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, ifp->vrf_id, __func__);
+
+ vrrp_if_add(ifp);
+
+ return 0;
+}
+
+int vrrp_ifp_destroy(struct interface *ifp)
+{
+ vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__);
+
+ vrrp_if_del(ifp);
+
+ return 0;
+}
+
+int vrrp_ifp_up(struct interface *ifp)
+{
+ vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__);
+
+ vrrp_if_up(ifp);
+
+ return 0;
+}
+
+int vrrp_ifp_down(struct interface *ifp)
{
- struct zclient_options opt = { .receive_notify = true };
+ vrrp_zebra_debug_if_state(ifp, ifp->vrf_id, __func__);
- zclient = zclient_new(master, &opt);
+ vrrp_if_down(ifp);
- zclient_init(zclient, 0, 0, &vrrp_privs);
+ 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, vrf_id, __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, vrf_id, __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, VRF_DEFAULT, r->mvl_ifp,
+ enable, VRRP_RADV_INT);
+}
+
+int 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");
+
+ return zclient_send_interface_protodown(zclient, VRF_DEFAULT, ifp,
+ down);
+}
+
+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);
+
+ zclient->zebra_connected = vrrp_zebra_connected;
+ zclient->router_id_update = vrrp_router_id_update_zebra;
+ zclient->interface_address_add = vrrp_zebra_if_address_add;
+ zclient->interface_address_delete = vrrp_zebra_if_address_del;
+
+ zclient_init(zclient, ZEBRA_ROUTE_VRRP, 0, &vrrp_privs);
+
+ zlog_notice("%s: zclient socket initialized", __PRETTY_FUNCTION__);
+}
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