diff options
Diffstat (limited to 'vrrpd/vrrp_zebra.c')
| -rw-r--r-- | vrrpd/vrrp_zebra.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/vrrpd/vrrp_zebra.c b/vrrpd/vrrp_zebra.c new file mode 100644 index 0000000000..7503034de3 --- /dev/null +++ b/vrrpd/vrrp_zebra.c @@ -0,0 +1,252 @@ +/* + * 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 + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#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, vrf_id_t vrf_id, + const char *func) +{ + DEBUGD(&vrrp_dbg_zebra, + "%s: %s index %d(%u) flags %ld metric %d mtu %d operative %d", + func, ifp->name, ifp->ifindex, vrf_id, (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; +} + +static int vrrp_zebra_if_add(int command, struct zclient *zclient, + zebra_size_t length, vrf_id_t vrf_id) +{ + struct interface *ifp; + + /* + * zebra api adds/dels interfaces using the same call + * interface_add_read below, see comments in lib/zclient.c + */ + ifp = zebra_interface_add_read(zclient->ibuf, vrf_id); + + if (!ifp) + return 0; + + vrrp_zebra_debug_if_state(ifp, vrf_id, __func__); + + vrrp_if_add(ifp); + + return 0; +} + +static int vrrp_zebra_if_del(int command, struct zclient *zclient, + zebra_size_t length, vrf_id_t vrf_id) +{ + struct interface *ifp; + + ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); + + if (!ifp) + return 0; + + vrrp_zebra_debug_if_state(ifp, vrf_id, __func__); + + vrrp_if_del(ifp); + + return 0; +} + +static int vrrp_zebra_if_state_up(int command, struct zclient *zclient, + zebra_size_t length, vrf_id_t vrf_id) +{ + struct interface *ifp; + + /* + * zebra api notifies interface up/down events by using the same call + * zebra_interface_state_read below, see comments in lib/zclient.c ifp = + * zebra_interface_state_read(zclient->ibuf, vrf_id); + */ + ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); + + if (!ifp) + return 0; + + vrrp_zebra_debug_if_state(ifp, vrf_id, __func__); + + vrrp_if_up(ifp); + + return 0; +} + +static int vrrp_zebra_if_state_down(int command, struct zclient *zclient, + zebra_size_t length, vrf_id_t vrf_id) +{ + struct interface *ifp; + + /* + * zebra api notifies interface up/down events by using the same call + * zebra_interface_state_read below, see comments in lib/zclient.c + */ + ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); + + if (!ifp) + return 0; + + vrrp_zebra_debug_if_state(ifp, vrf_id, __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, 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) +{ + /* 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_add = vrrp_zebra_if_add; + zclient->interface_delete = vrrp_zebra_if_del; + zclient->interface_up = vrrp_zebra_if_state_up; + zclient->interface_down = vrrp_zebra_if_state_down; + 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__); +} |