diff options
Diffstat (limited to 'staticd/static_nht.c')
| -rw-r--r-- | staticd/static_nht.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/staticd/static_nht.c b/staticd/static_nht.c new file mode 100644 index 0000000..ebc5ea1 --- /dev/null +++ b/staticd/static_nht.c @@ -0,0 +1,211 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Static NHT code. + * Copyright (C) 2018 Cumulus Networks, Inc. + * Donald Sharp + */ +#include <zebra.h> + +#include "prefix.h" +#include "table.h" +#include "vrf.h" +#include "nexthop.h" +#include "srcdest_table.h" + +#include "static_vrf.h" +#include "static_routes.h" +#include "static_zebra.h" +#include "static_nht.h" + +static void static_nht_update_path(struct static_path *pn, struct prefix *nhp, + uint32_t nh_num, vrf_id_t nh_vrf_id, + struct vrf *vrf) +{ + struct static_nexthop *nh; + + frr_each(static_nexthop_list, &pn->nexthop_list, nh) { + if (nh->nh_vrf_id != nh_vrf_id) + continue; + + if (nh->type != STATIC_IPV4_GATEWAY + && nh->type != STATIC_IPV4_GATEWAY_IFNAME + && nh->type != STATIC_IPV6_GATEWAY + && nh->type != STATIC_IPV6_GATEWAY_IFNAME) + continue; + + if (nhp->family == AF_INET + && nhp->u.prefix4.s_addr == nh->addr.ipv4.s_addr) + nh->nh_valid = !!nh_num; + + if (nhp->family == AF_INET6 + && memcmp(&nhp->u.prefix6, &nh->addr.ipv6, IPV6_MAX_BYTELEN) + == 0) + nh->nh_valid = !!nh_num; + + if (nh->state == STATIC_START) + static_zebra_route_add(pn, true); + } +} + +static void static_nht_update_safi(struct prefix *sp, struct prefix *nhp, + uint32_t nh_num, afi_t afi, safi_t safi, + struct vrf *vrf, vrf_id_t nh_vrf_id) +{ + struct route_table *stable; + struct static_vrf *svrf; + struct route_node *rn; + struct static_path *pn; + struct static_route_info *si; + + svrf = vrf->info; + if (!svrf) + return; + + stable = static_vrf_static_table(afi, safi, svrf); + if (!stable) + return; + + if (sp) { + rn = srcdest_rnode_lookup(stable, sp, NULL); + if (rn && rn->info) { + si = static_route_info_from_rnode(rn); + frr_each(static_path_list, &si->path_list, pn) { + static_nht_update_path(pn, nhp, nh_num, + nh_vrf_id, vrf); + } + route_unlock_node(rn); + } + return; + } + + for (rn = route_top(stable); rn; rn = route_next(rn)) { + si = static_route_info_from_rnode(rn); + if (!si) + continue; + frr_each(static_path_list, &si->path_list, pn) { + static_nht_update_path(pn, nhp, nh_num, nh_vrf_id, vrf); + } + } +} + +void static_nht_update(struct prefix *sp, struct prefix *nhp, uint32_t nh_num, + afi_t afi, safi_t safi, vrf_id_t nh_vrf_id) +{ + + struct vrf *vrf; + + RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) + static_nht_update_safi(sp, nhp, nh_num, afi, safi, vrf, + nh_vrf_id); +} + +static void static_nht_reset_start_safi(struct prefix *nhp, afi_t afi, + safi_t safi, struct vrf *vrf, + vrf_id_t nh_vrf_id) +{ + struct static_vrf *svrf; + struct route_table *stable; + struct static_nexthop *nh; + struct static_path *pn; + struct route_node *rn; + struct static_route_info *si; + + svrf = vrf->info; + if (!svrf) + return; + + stable = static_vrf_static_table(afi, safi, svrf); + if (!stable) + return; + + for (rn = route_top(stable); rn; rn = route_next(rn)) { + si = static_route_info_from_rnode(rn); + if (!si) + continue; + frr_each(static_path_list, &si->path_list, pn) { + frr_each(static_nexthop_list, &pn->nexthop_list, nh) { + if (nh->nh_vrf_id != nh_vrf_id) + continue; + + if (nhp->family == AF_INET + && nhp->u.prefix4.s_addr + != nh->addr.ipv4.s_addr) + continue; + + if (nhp->family == AF_INET6 + && memcmp(&nhp->u.prefix6, &nh->addr.ipv6, + 16) + != 0) + continue; + + /* + * We've been told that a nexthop we + * depend on has changed in some manner, + * so reset the state machine to allow + * us to start over. + */ + nh->state = STATIC_START; + } + } + } +} + +void static_nht_reset_start(struct prefix *nhp, afi_t afi, safi_t safi, + vrf_id_t nh_vrf_id) +{ + struct vrf *vrf; + + RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) + static_nht_reset_start_safi(nhp, afi, safi, vrf, nh_vrf_id); +} + +static void static_nht_mark_state_safi(struct prefix *sp, afi_t afi, + safi_t safi, struct vrf *vrf, + enum static_install_states state) +{ + struct static_vrf *svrf; + struct route_table *stable; + struct route_node *rn; + struct static_nexthop *nh; + struct static_path *pn; + struct static_route_info *si; + + svrf = vrf->info; + if (!svrf) + return; + + stable = static_vrf_static_table(afi, safi, svrf); + if (!stable) + return; + + rn = srcdest_rnode_lookup(stable, sp, NULL); + if (!rn) + return; + si = rn->info; + if (si) { + frr_each(static_path_list, &si->path_list, pn) { + frr_each(static_nexthop_list, &pn->nexthop_list, nh) { + nh->state = state; + } + } + } + + route_unlock_node(rn); +} + +void static_nht_mark_state(struct prefix *sp, safi_t safi, vrf_id_t vrf_id, + enum static_install_states state) +{ + struct vrf *vrf; + + afi_t afi = AFI_IP; + + if (sp->family == AF_INET6) + afi = AFI_IP6; + + vrf = vrf_lookup_by_id(vrf_id); + if (!vrf || !vrf->info) + return; + + static_nht_mark_state_safi(sp, afi, safi, vrf, state); +} |