diff options
Diffstat (limited to '')
| -rw-r--r-- | zebra/zapi_msg.c | 3972 |
1 files changed, 3972 insertions, 0 deletions
diff --git a/zebra/zapi_msg.c b/zebra/zapi_msg.c new file mode 100644 index 0000000..6754238 --- /dev/null +++ b/zebra/zapi_msg.c @@ -0,0 +1,3972 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Zebra API message creation & consumption. + * Portions: + * Copyright (C) 1997-1999 Kunihiro Ishiguro + * Copyright (C) 2015-2018 Cumulus Networks, Inc. + * et al. + * Copyright (c) 2021 The MITRE Corporation. + * Copyright (c) 2023 LabN Consulting, L.L.C. + */ + +#include <zebra.h> +#include <libgen.h> + +#include "lib/prefix.h" +#include "lib/stream.h" +#include "lib/memory.h" +#include "lib/table.h" +#include "lib/network.h" +#include "lib/log.h" +#include "lib/zclient.h" +#include "lib/privs.h" +#include "lib/nexthop.h" +#include "lib/vrf.h" +#include "lib/libfrr.h" +#include "lib/lib_errors.h" + +#include "zebra/zebra_router.h" +#include "zebra/rib.h" +#include "zebra/zebra_ns.h" +#include "zebra/zebra_vrf.h" +#include "zebra/router-id.h" +#include "zebra/redistribute.h" +#include "zebra/debug.h" +#include "zebra/zebra_rnh.h" +#include "zebra/interface.h" +#include "zebra/zebra_ptm.h" +#include "zebra/rtadv.h" +#include "zebra/zebra_mpls.h" +#include "zebra/zebra_mroute.h" +#include "zebra/zebra_vxlan.h" +#include "zebra/zebra_evpn_mh.h" +#include "zebra/rt.h" +#include "zebra/zebra_pbr.h" +#include "zebra/zebra_tc.h" +#include "zebra/table_manager.h" +#include "zebra/zapi_msg.h" +#include "zebra/zebra_errors.h" +#include "zebra/zebra_mlag.h" +#include "zebra/connected.h" +#include "zebra/zebra_opaque.h" +#include "zebra/zebra_srte.h" +#include "zebra/zebra_srv6.h" + +DEFINE_MTYPE_STATIC(ZEBRA, RE_OPAQUE, "Route Opaque Data"); + +static int zapi_nhg_decode(struct stream *s, int cmd, struct zapi_nhg *api_nhg); + +/* Encoding helpers -------------------------------------------------------- */ + +static void zserv_encode_interface(struct stream *s, struct interface *ifp) +{ + /* Interface information. */ + struct zebra_if *zif = ifp->info; + + stream_put(s, ifp->name, INTERFACE_NAMSIZ); + stream_putl(s, ifp->ifindex); + stream_putc(s, ifp->status); + stream_putq(s, ifp->flags); + stream_putc(s, ifp->ptm_enable); + stream_putc(s, ifp->ptm_status); + stream_putl(s, ifp->metric); + stream_putl(s, ifp->speed); + stream_putl(s, ifp->txqlen); + stream_putl(s, ifp->mtu); + stream_putl(s, ifp->mtu6); + stream_putl(s, ifp->bandwidth); + stream_putl(s, zif->link_ifindex); + stream_putl(s, ifp->ll_type); + stream_putl(s, ifp->hw_addr_len); + if (ifp->hw_addr_len) + stream_put(s, ifp->hw_addr, ifp->hw_addr_len); + + /* Then, Traffic Engineering parameters if any */ + if (HAS_LINK_PARAMS(ifp) && IS_LINK_PARAMS_SET(ifp->link_params)) { + stream_putc(s, 1); + zebra_interface_link_params_write(s, ifp); + } else + stream_putc(s, 0); + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); +} + +static void zserv_encode_vrf(struct stream *s, struct zebra_vrf *zvrf) +{ + struct vrf_data data; + const char *netns_name = zvrf_ns_name(zvrf); + + memset(&data, 0, sizeof(data)); + data.l.table_id = zvrf->table_id; + + if (netns_name) + strlcpy(data.l.netns_name, basename((char *)netns_name), + NS_NAMSIZ); + else + memset(data.l.netns_name, 0, NS_NAMSIZ); + /* Pass the tableid and the netns NAME */ + stream_put(s, &data, sizeof(struct vrf_data)); + /* Interface information. */ + stream_put(s, zvrf_name(zvrf), VRF_NAMSIZ); + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); +} + +static int zserv_encode_nexthop(struct stream *s, struct nexthop *nexthop) +{ + stream_putl(s, nexthop->vrf_id); + stream_putc(s, nexthop->type); + switch (nexthop->type) { + case NEXTHOP_TYPE_IPV4: + case NEXTHOP_TYPE_IPV4_IFINDEX: + stream_put_in_addr(s, &nexthop->gate.ipv4); + stream_putl(s, nexthop->ifindex); + break; + case NEXTHOP_TYPE_IPV6: + case NEXTHOP_TYPE_IPV6_IFINDEX: + stream_put(s, &nexthop->gate.ipv6, 16); + stream_putl(s, nexthop->ifindex); + break; + case NEXTHOP_TYPE_IFINDEX: + stream_putl(s, nexthop->ifindex); + break; + case NEXTHOP_TYPE_BLACKHOLE: + /* do nothing */ + break; + } + return 1; +} + +/* + * Zebra error addition adds error type. + * + * + * 0 1 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | enum zebra_error_types | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * + */ +static void zserv_encode_error(struct stream *s, enum zebra_error_types error) +{ + stream_put(s, &error, sizeof(error)); + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); +} + +/* Send handlers ----------------------------------------------------------- */ + +/* Interface is added. Send ZEBRA_INTERFACE_ADD to client. */ +/* + * This function is called in the following situations: + * - in response to a 3-byte ZEBRA_INTERFACE_ADD request + * from the client. + * - at startup, when zebra figures out the available interfaces + * - when an interface is added (where support for + * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when + * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is + * received) + */ +int zsend_interface_add(struct zserv *client, struct interface *ifp) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_INTERFACE_ADD, ifp->vrf->vrf_id); + zserv_encode_interface(s, ifp); + + client->ifadd_cnt++; + return zserv_send_message(client, s); +} + +/* Interface deletion from zebra daemon. */ +int zsend_interface_delete(struct zserv *client, struct interface *ifp) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_INTERFACE_DELETE, ifp->vrf->vrf_id); + zserv_encode_interface(s, ifp); + + client->ifdel_cnt++; + return zserv_send_message(client, s); +} + +int zsend_vrf_add(struct zserv *client, struct zebra_vrf *zvrf) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_VRF_ADD, zvrf_id(zvrf)); + zserv_encode_vrf(s, zvrf); + + client->vrfadd_cnt++; + return zserv_send_message(client, s); +} + +/* VRF deletion from zebra daemon. */ +int zsend_vrf_delete(struct zserv *client, struct zebra_vrf *zvrf) + +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_VRF_DELETE, zvrf_id(zvrf)); + zserv_encode_vrf(s, zvrf); + + client->vrfdel_cnt++; + return zserv_send_message(client, s); +} + +int zsend_interface_link_params(struct zserv *client, struct interface *ifp) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_INTERFACE_LINK_PARAMS, ifp->vrf->vrf_id); + + /* Add Interface Index */ + stream_putl(s, ifp->ifindex); + + /* Then TE Link Parameters */ + if (zebra_interface_link_params_write(s, ifp) == 0) { + stream_free(s); + return 0; + } + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* Interface address is added/deleted. Send ZEBRA_INTERFACE_ADDRESS_ADD or + * ZEBRA_INTERFACE_ADDRESS_DELETE to the client. + * + * A ZEBRA_INTERFACE_ADDRESS_ADD is sent in the following situations: + * - in response to a 3-byte ZEBRA_INTERFACE_ADD request + * from the client, after the ZEBRA_INTERFACE_ADD has been + * sent from zebra to the client + * - redistribute new address info to all clients in the following situations + * - at startup, when zebra figures out the available interfaces + * - when an interface is added (where support for + * RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when + * an interface is marked IFF_UP (i.e., an RTM_IFINFO message is + * received) + * - for the vty commands "ip address A.B.C.D/M [<label LINE>]" + * and "no bandwidth <1-10000000>", "ipv6 address X:X::X:X/M" + * - when an RTM_NEWADDR message is received from the kernel, + * + * The call tree that triggers ZEBRA_INTERFACE_ADDRESS_DELETE: + * + * zsend_interface_address(DELETE) + * ^ + * | + * zebra_interface_address_delete_update + * ^ ^ ^ + * | | if_delete_update + * | | + * ip_address_uninstall connected_delete_ipv4 + * [ipv6_addresss_uninstall] [connected_delete_ipv6] + * ^ ^ + * | | + * | RTM_NEWADDR on routing/netlink socket + * | + * vty commands: + * "no ip address A.B.C.D/M [label LINE]" + * "no ip address A.B.C.D/M" + * ["no ipv6 address X:X::X:X/M"] + * + */ +int zsend_interface_address(int cmd, struct zserv *client, + struct interface *ifp, struct connected *ifc) +{ + int blen; + struct prefix *p; + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, cmd, ifp->vrf->vrf_id); + stream_putl(s, ifp->ifindex); + + /* Interface address flag. */ + stream_putc(s, ifc->flags); + + /* Prefix information. */ + p = ifc->address; + stream_putc(s, p->family); + blen = prefix_blen(p); + stream_put(s, &p->u.prefix, blen); + + /* + * XXX gnu version does not send prefixlen for + * ZEBRA_INTERFACE_ADDRESS_DELETE + * but zebra_interface_address_delete_read() in the gnu version + * expects to find it + */ + stream_putc(s, p->prefixlen); + + /* Destination. */ + p = ifc->destination; + if (p) + stream_put(s, &p->u.prefix, blen); + else + stream_put(s, NULL, blen); + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + client->connected_rt_add_cnt++; + return zserv_send_message(client, s); +} + +static int zsend_interface_nbr_address(int cmd, struct zserv *client, + struct interface *ifp, + struct nbr_connected *ifc) +{ + int blen; + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + struct prefix *p; + + zclient_create_header(s, cmd, ifp->vrf->vrf_id); + stream_putl(s, ifp->ifindex); + + /* Prefix information. */ + p = ifc->address; + stream_putc(s, p->family); + blen = prefix_blen(p); + stream_put(s, &p->u.prefix, blen); + + /* + * XXX gnu version does not send prefixlen for + * ZEBRA_INTERFACE_ADDRESS_DELETE + * but zebra_interface_address_delete_read() in the gnu version + * expects to find it + */ + stream_putc(s, p->prefixlen); + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* Interface address addition. */ +static void zebra_interface_nbr_address_add_update(struct interface *ifp, + struct nbr_connected *ifc) +{ + struct listnode *node, *nnode; + struct zserv *client; + struct prefix *p; + + if (IS_ZEBRA_DEBUG_EVENT) { + char buf[INET6_ADDRSTRLEN]; + + p = ifc->address; + zlog_debug( + "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_ADD %s/%d on %s", + inet_ntop(p->family, &p->u.prefix, buf, + INET6_ADDRSTRLEN), + p->prefixlen, ifc->ifp->name); + } + + for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) { + /* Do not send unsolicited messages to synchronous clients. */ + if (client->synchronous) + continue; + + zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD, + client, ifp, ifc); + } +} + +/* Interface address deletion. */ +static void zebra_interface_nbr_address_delete_update(struct interface *ifp, + struct nbr_connected *ifc) +{ + struct listnode *node, *nnode; + struct zserv *client; + struct prefix *p; + + if (IS_ZEBRA_DEBUG_EVENT) { + char buf[INET6_ADDRSTRLEN]; + + p = ifc->address; + zlog_debug( + "MESSAGE: ZEBRA_INTERFACE_NBR_ADDRESS_DELETE %s/%d on %s", + inet_ntop(p->family, &p->u.prefix, buf, + INET6_ADDRSTRLEN), + p->prefixlen, ifc->ifp->name); + } + + for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) { + /* Do not send unsolicited messages to synchronous clients. */ + if (client->synchronous) + continue; + + zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_DELETE, + client, ifp, ifc); + } +} + +/* Send addresses on interface to client */ +int zsend_interface_addresses(struct zserv *client, struct interface *ifp) +{ + struct listnode *cnode, *cnnode; + struct connected *c; + struct nbr_connected *nc; + + /* Send interface addresses. */ + for (ALL_LIST_ELEMENTS(ifp->connected, cnode, cnnode, c)) { + if (!CHECK_FLAG(c->conf, ZEBRA_IFC_REAL)) + continue; + + if (zsend_interface_address(ZEBRA_INTERFACE_ADDRESS_ADD, client, + ifp, c) + < 0) + return -1; + } + + /* Send interface neighbors. */ + for (ALL_LIST_ELEMENTS(ifp->nbr_connected, cnode, cnnode, nc)) { + if (zsend_interface_nbr_address(ZEBRA_INTERFACE_NBR_ADDRESS_ADD, + client, ifp, nc) + < 0) + return -1; + } + + return 0; +} + +/* Add new nbr connected IPv6 address */ +void nbr_connected_add_ipv6(struct interface *ifp, struct in6_addr *address) +{ + struct nbr_connected *ifc; + struct prefix p; + + p.family = AF_INET6; + IPV6_ADDR_COPY(&p.u.prefix6, address); + p.prefixlen = IPV6_MAX_BITLEN; + + ifc = listnode_head(ifp->nbr_connected); + if (!ifc) { + /* new addition */ + ifc = nbr_connected_new(); + ifc->address = prefix_new(); + ifc->ifp = ifp; + listnode_add(ifp->nbr_connected, ifc); + } + + prefix_copy(ifc->address, &p); + + zebra_interface_nbr_address_add_update(ifp, ifc); + + if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 1); +} + +void nbr_connected_delete_ipv6(struct interface *ifp, struct in6_addr *address) +{ + struct nbr_connected *ifc; + struct prefix p; + + p.family = AF_INET6; + IPV6_ADDR_COPY(&p.u.prefix6, address); + p.prefixlen = IPV6_MAX_BITLEN; + + ifc = nbr_connected_check(ifp, &p); + if (!ifc) + return; + + listnode_delete(ifp->nbr_connected, ifc); + + zebra_interface_nbr_address_delete_update(ifp, ifc); + + if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, address, 0); + + nbr_connected_free(ifc); +} + +/* + * The cmd passed to zsend_interface_update may be ZEBRA_INTERFACE_UP or + * ZEBRA_INTERFACE_DOWN. + * + * The ZEBRA_INTERFACE_UP message is sent from the zebra server to + * the clients in one of 2 situations: + * - an if_up is detected e.g., as a result of an RTM_IFINFO message + * - a vty command modifying the bandwidth of an interface is received. + * The ZEBRA_INTERFACE_DOWN message is sent when an if_down is detected. + */ +int zsend_interface_update(int cmd, struct zserv *client, struct interface *ifp) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, cmd, ifp->vrf->vrf_id); + zserv_encode_interface(s, ifp); + + if (cmd == ZEBRA_INTERFACE_UP) + client->ifup_cnt++; + else + client->ifdown_cnt++; + + return zserv_send_message(client, s); +} + +int zsend_redistribute_route(int cmd, struct zserv *client, + const struct route_node *rn, + const struct route_entry *re) +{ + struct zapi_route api; + struct zapi_nexthop *api_nh; + struct nexthop *nexthop; + const struct prefix *p, *src_p; + uint8_t count = 0; + afi_t afi; + size_t stream_size = + MAX(ZEBRA_MAX_PACKET_SIZ, sizeof(struct zapi_route)); + + srcdest_rnode_prefixes(rn, &p, &src_p); + memset(&api, 0, sizeof(api)); + api.vrf_id = re->vrf_id; + api.type = re->type; + api.safi = SAFI_UNICAST; + api.instance = re->instance; + api.flags = re->flags; + + afi = family2afi(p->family); + switch (afi) { + case AFI_IP: + if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) + client->redist_v4_add_cnt++; + else + client->redist_v4_del_cnt++; + break; + case AFI_IP6: + if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) + client->redist_v6_add_cnt++; + else + client->redist_v6_del_cnt++; + break; + case AFI_L2VPN: + case AFI_MAX: + case AFI_UNSPEC: + break; + } + + /* Prefix. */ + api.prefix = *p; + if (src_p) { + SET_FLAG(api.message, ZAPI_MESSAGE_SRCPFX); + memcpy(&api.src_prefix, src_p, sizeof(api.src_prefix)); + } + + for (nexthop = re->nhe->nhg.nexthop; + nexthop; nexthop = nexthop->next) { + if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) + continue; + + api_nh = &api.nexthops[count]; + api_nh->vrf_id = nexthop->vrf_id; + api_nh->type = nexthop->type; + api_nh->weight = nexthop->weight; + switch (nexthop->type) { + case NEXTHOP_TYPE_BLACKHOLE: + api_nh->bh_type = nexthop->bh_type; + break; + case NEXTHOP_TYPE_IPV4: + case NEXTHOP_TYPE_IPV4_IFINDEX: + api_nh->gate.ipv4 = nexthop->gate.ipv4; + api_nh->ifindex = nexthop->ifindex; + break; + case NEXTHOP_TYPE_IFINDEX: + api_nh->ifindex = nexthop->ifindex; + break; + case NEXTHOP_TYPE_IPV6: + case NEXTHOP_TYPE_IPV6_IFINDEX: + api_nh->gate.ipv6 = nexthop->gate.ipv6; + api_nh->ifindex = nexthop->ifindex; + } + count++; + } + + /* Nexthops. */ + if (count) { + SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); + api.nexthop_num = count; + } + + /* Attributes. */ + SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE); + api.distance = re->distance; + SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); + api.metric = re->metric; + if (re->tag) { + SET_FLAG(api.message, ZAPI_MESSAGE_TAG); + api.tag = re->tag; + } + SET_FLAG(api.message, ZAPI_MESSAGE_MTU); + api.mtu = re->mtu; + + struct stream *s = stream_new(stream_size); + + /* Encode route and send. */ + if (zapi_route_encode(cmd, s, &api) < 0) { + stream_free(s); + return -1; + } + + if (IS_ZEBRA_DEBUG_SEND) + zlog_debug("%s: %s to client %s: type %s, vrf_id %d, p %pFX", + __func__, zserv_command_string(cmd), + zebra_route_string(client->proto), + zebra_route_string(api.type), api.vrf_id, + &api.prefix); + return zserv_send_message(client, s); +} + +/* + * Modified version of zsend_ipv4_nexthop_lookup(): Query unicast rib if + * nexthop is not found on mrib. Returns both route metric and protocol + * distance. + * + * *XXX* this ZAPI call is slated to be removed at some point in the future + * since MRIB support in PIM is hopelessly broken in its interactions with NHT. + * The plan is to make pimd use NHT to receive URIB and MRIB in parallel and + * make the decision there, which will obsolete this ZAPI op. + * (Otherwise we would need to implement sending NHT updates for the result of + * this "URIB-MRIB-combined" table, but we only decide that here on the fly, + * so it'd be rather complex to do NHT for.) + */ +static int zsend_nexthop_lookup_mrib(struct zserv *client, struct ipaddr *addr, + struct route_entry *re, + struct zebra_vrf *zvrf) +{ + struct stream *s; + unsigned long nump; + uint8_t num; + struct nexthop *nexthop; + + /* Get output stream. */ + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + stream_reset(s); + + /* Fill in result. */ + zclient_create_header(s, ZEBRA_NEXTHOP_LOOKUP_MRIB, zvrf_id(zvrf)); + stream_put_ipaddr(s, addr); + + if (re) { + struct nexthop_group *nhg; + + stream_putc(s, re->distance); + stream_putl(s, re->metric); + num = 0; + /* remember position for nexthop_num */ + nump = stream_get_endp(s); + /* reserve room for nexthop_num */ + stream_putc(s, 0); + nhg = rib_get_fib_nhg(re); + for (ALL_NEXTHOPS_PTR(nhg, nexthop)) { + if (rnh_nexthop_valid(re, nexthop)) + num += zserv_encode_nexthop(s, nexthop); + } + + /* store nexthop_num */ + stream_putc_at(s, nump, num); + } else { + stream_putc(s, 0); /* distance */ + stream_putl(s, 0); /* metric */ + stream_putc(s, 0); /* nexthop_num */ + } + + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +int zsend_nhg_notify(uint16_t type, uint16_t instance, uint32_t session_id, + uint32_t id, enum zapi_nhg_notify_owner note) +{ + struct zserv *client; + struct stream *s; + + client = zserv_find_client_session(type, instance, session_id); + if (!client) { + if (IS_ZEBRA_DEBUG_PACKET) { + zlog_debug("Not Notifying Owner: %u(%u) about %u(%d)", + type, instance, id, note); + } + return 0; + } + + if (IS_ZEBRA_DEBUG_SEND) + zlog_debug("%s: type %d, id %d, note %s", + __func__, type, id, zapi_nhg_notify_owner2str(note)); + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + stream_reset(s); + + zclient_create_header(s, ZEBRA_NHG_NOTIFY_OWNER, VRF_DEFAULT); + + stream_put(s, ¬e, sizeof(note)); + stream_putl(s, id); + + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* + * Common utility send route notification, called from a path using a + * route_entry and from a path using a dataplane context. + */ +static int route_notify_internal(const struct route_node *rn, int type, + uint16_t instance, vrf_id_t vrf_id, + uint32_t table_id, + enum zapi_route_notify_owner note, afi_t afi, + safi_t safi) +{ + struct zserv *client; + struct stream *s; + uint8_t blen; + + client = zserv_find_client(type, instance); + if (!client || !client->notify_owner) { + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug( + "Not Notifying Owner: %s about prefix %pRN(%u) %d vrf: %u", + zebra_route_string(type), rn, table_id, note, + vrf_id); + return 0; + } + + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug( + "Notifying Owner: %s about prefix %pRN(%u) %d vrf: %u", + zebra_route_string(type), rn, table_id, note, vrf_id); + + /* We're just allocating a small-ish buffer here, since we only + * encode a small amount of data. + */ + s = stream_new(ZEBRA_SMALL_PACKET_SIZE); + + stream_reset(s); + + zclient_create_header(s, ZEBRA_ROUTE_NOTIFY_OWNER, vrf_id); + + stream_put(s, ¬e, sizeof(note)); + + stream_putc(s, rn->p.family); + + blen = prefix_blen(&rn->p); + stream_putc(s, rn->p.prefixlen); + stream_put(s, &rn->p.u.prefix, blen); + + stream_putl(s, table_id); + + /* Encode AFI, SAFI in the message */ + stream_putc(s, afi); + stream_putc(s, safi); + + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +int zsend_route_notify_owner(const struct route_node *rn, + struct route_entry *re, + enum zapi_route_notify_owner note, afi_t afi, + safi_t safi) +{ + return (route_notify_internal(rn, re->type, re->instance, re->vrf_id, + re->table, note, afi, safi)); +} + +/* + * Route-owner notification using info from dataplane update context. + */ +int zsend_route_notify_owner_ctx(const struct zebra_dplane_ctx *ctx, + enum zapi_route_notify_owner note) +{ + int result; + struct route_node *rn = rib_find_rn_from_ctx(ctx); + + result = route_notify_internal( + rn, dplane_ctx_get_type(ctx), dplane_ctx_get_instance(ctx), + dplane_ctx_get_vrf(ctx), dplane_ctx_get_table(ctx), note, + dplane_ctx_get_afi(ctx), dplane_ctx_get_safi(ctx)); + + route_unlock_node(rn); + + return result; +} + +static void zread_route_notify_request(ZAPI_HANDLER_ARGS) +{ + uint8_t notify; + + STREAM_GETC(msg, notify); + client->notify_owner = notify; +stream_failure: + return; +} + +void zsend_rule_notify_owner(const struct zebra_dplane_ctx *ctx, + enum zapi_rule_notify_owner note) +{ + struct listnode *node; + struct zserv *client; + struct stream *s; + + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug("%s: Notifying %u", __func__, + dplane_ctx_rule_get_unique(ctx)); + + for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) { + if (dplane_ctx_rule_get_sock(ctx) == client->sock) + break; + } + + if (!client) + return; + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_RULE_NOTIFY_OWNER, + dplane_ctx_rule_get_vrfid(ctx)); + + stream_put(s, ¬e, sizeof(note)); + stream_putl(s, dplane_ctx_rule_get_seq(ctx)); + stream_putl(s, dplane_ctx_rule_get_priority(ctx)); + stream_putl(s, dplane_ctx_rule_get_unique(ctx)); + stream_put(s, dplane_ctx_rule_get_ifname(ctx), INTERFACE_NAMSIZ); + + stream_putw_at(s, 0, stream_get_endp(s)); + + zserv_send_message(client, s); +} + +void zsend_iptable_notify_owner(const struct zebra_dplane_ctx *ctx, + enum zapi_iptable_notify_owner note) +{ + struct listnode *node; + struct zserv *client; + struct stream *s; + struct zebra_pbr_iptable ipt; + uint16_t cmd = ZEBRA_IPTABLE_NOTIFY_OWNER; + struct zebra_pbr_iptable *ipt_hash; + enum dplane_op_e op = dplane_ctx_get_op(ctx); + + dplane_ctx_get_pbr_iptable(ctx, &ipt); + + ipt_hash = hash_lookup(zrouter.iptable_hash, &ipt); + if (ipt_hash) { + if (op == DPLANE_OP_IPTABLE_ADD && + CHECK_FLAG(ipt_hash->internal_flags, + IPTABLE_INSTALL_QUEUED)) + UNSET_FLAG(ipt_hash->internal_flags, + IPTABLE_INSTALL_QUEUED); + else if (op == DPLANE_OP_IPTABLE_DELETE && + CHECK_FLAG(ipt_hash->internal_flags, + IPTABLE_UNINSTALL_QUEUED)) + UNSET_FLAG(ipt_hash->internal_flags, + IPTABLE_UNINSTALL_QUEUED); + } + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug("%s: Notifying %s id %u note %u", __func__, + zserv_command_string(cmd), ipt.unique, note); + + for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) { + if (ipt.sock == client->sock) + break; + } + + if (!client) + return; + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, cmd, VRF_DEFAULT); + stream_putw(s, note); + stream_putl(s, ipt.unique); + stream_put(s, ipt.ipset_name, ZEBRA_IPSET_NAME_SIZE); + stream_putw_at(s, 0, stream_get_endp(s)); + + zserv_send_message(client, s); +} + +void zsend_ipset_notify_owner(const struct zebra_dplane_ctx *ctx, + enum zapi_ipset_notify_owner note) +{ + struct listnode *node; + struct zserv *client; + struct stream *s; + struct zebra_pbr_ipset ipset; + uint16_t cmd = ZEBRA_IPSET_NOTIFY_OWNER; + + dplane_ctx_get_pbr_ipset(ctx, &ipset); + + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug("%s: Notifying %s id %u note %u", __func__, + zserv_command_string(cmd), ipset.unique, note); + + for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) { + if (ipset.sock == client->sock) + break; + } + + if (!client) + return; + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, cmd, VRF_DEFAULT); + stream_putw(s, note); + stream_putl(s, ipset.unique); + stream_put(s, ipset.ipset_name, ZEBRA_IPSET_NAME_SIZE); + stream_putw_at(s, 0, stream_get_endp(s)); + + zserv_send_message(client, s); +} + +void zsend_ipset_entry_notify_owner(const struct zebra_dplane_ctx *ctx, + enum zapi_ipset_entry_notify_owner note) +{ + struct listnode *node; + struct zserv *client; + struct stream *s; + struct zebra_pbr_ipset_entry ipent; + struct zebra_pbr_ipset ipset; + uint16_t cmd = ZEBRA_IPSET_ENTRY_NOTIFY_OWNER; + + dplane_ctx_get_pbr_ipset_entry(ctx, &ipent); + dplane_ctx_get_pbr_ipset(ctx, &ipset); + + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug("%s: Notifying %s id %u note %u", __func__, + zserv_command_string(cmd), ipent.unique, note); + + for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) { + if (ipent.sock == client->sock) + break; + } + + if (!client) + return; + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, cmd, VRF_DEFAULT); + stream_putw(s, note); + stream_putl(s, ipent.unique); + stream_put(s, ipset.ipset_name, ZEBRA_IPSET_NAME_SIZE); + stream_putw_at(s, 0, stream_get_endp(s)); + + zserv_send_message(client, s); +} + +void zsend_nhrp_neighbor_notify(int cmd, struct interface *ifp, + struct ipaddr *ipaddr, int ndm_state, + union sockunion *link_layer_ipv4) +{ + struct stream *s; + struct listnode *node, *nnode; + struct zserv *client; + afi_t afi; + union sockunion ip; + + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug("%s: Notifying Neighbor entry (%u)", __func__, cmd); + + sockunion_family(&ip) = ipaddr_family(ipaddr); + afi = family2afi(sockunion_family(&ip)); + memcpy((char *)sockunion_get_addr(&ip), &ipaddr->ip.addr, + family2addrsize(sockunion_family(&ip))); + + for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) { + if (!vrf_bitmap_check(&client->nhrp_neighinfo[afi], + ifp->vrf->vrf_id)) + continue; + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + zclient_neigh_ip_encode(s, cmd, &ip, link_layer_ipv4, ifp, + ndm_state); + stream_putw_at(s, 0, stream_get_endp(s)); + zserv_send_message(client, s); + } +} + + +/* Router-id is updated. Send ZEBRA_ROUTER_ID_UPDATE to client. */ +int zsend_router_id_update(struct zserv *client, afi_t afi, struct prefix *p, + vrf_id_t vrf_id) +{ + int blen; + struct stream *s; + + /* Check this client need interface information. */ + if (!vrf_bitmap_check(&client->ridinfo[afi], vrf_id)) + return 0; + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + /* Message type. */ + zclient_create_header(s, ZEBRA_ROUTER_ID_UPDATE, vrf_id); + + /* Prefix information. */ + stream_putc(s, p->family); + blen = prefix_blen(p); + stream_put(s, &p->u.prefix, blen); + stream_putc(s, p->prefixlen); + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* + * Function used by Zebra to send a PW status update to LDP daemon + */ +int zsend_pw_update(struct zserv *client, struct zebra_pw *pw) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_PW_STATUS_UPDATE, pw->vrf_id); + stream_write(s, pw->ifname, INTERFACE_NAMSIZ); + stream_putl(s, pw->ifindex); + stream_putl(s, pw->status); + + /* Put length at the first point of the stream. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* Send response to a get label chunk request to client */ +int zsend_assign_label_chunk_response(struct zserv *client, vrf_id_t vrf_id, + struct label_manager_chunk *lmc) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, vrf_id); + /* proto */ + stream_putc(s, client->proto); + /* instance */ + stream_putw(s, client->instance); + + if (lmc) { + /* keep */ + stream_putc(s, lmc->keep); + /* start and end labels */ + stream_putl(s, lmc->start); + stream_putl(s, lmc->end); + } + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* Send response to a label manager connect request to client */ +int zsend_label_manager_connect_response(struct zserv *client, vrf_id_t vrf_id, + unsigned short result) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_LABEL_MANAGER_CONNECT, vrf_id); + + /* proto */ + stream_putc(s, client->proto); + + /* instance */ + stream_putw(s, client->instance); + + /* result */ + stream_putc(s, result); + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* Send response to a get table chunk request to client */ +static int zsend_assign_table_chunk_response(struct zserv *client, + vrf_id_t vrf_id, + struct table_manager_chunk *tmc) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_GET_TABLE_CHUNK, vrf_id); + + if (tmc) { + /* start and end labels */ + stream_putl(s, tmc->start); + stream_putl(s, tmc->end); + } + + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +static int zsend_table_manager_connect_response(struct zserv *client, + vrf_id_t vrf_id, + uint16_t result) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_TABLE_MANAGER_CONNECT, vrf_id); + + /* result */ + stream_putc(s, result); + + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* SRv6 locator add notification from zebra daemon. */ +int zsend_zebra_srv6_locator_add(struct zserv *client, struct srv6_locator *loc) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_SRV6_LOCATOR_ADD, VRF_DEFAULT); + zapi_srv6_locator_encode(s, loc); + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* SRv6 locator delete notification from zebra daemon. */ +int zsend_zebra_srv6_locator_delete(struct zserv *client, + struct srv6_locator *loc) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_SRV6_LOCATOR_DELETE, VRF_DEFAULT); + zapi_srv6_locator_encode(s, loc); + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* Inbound message handling ------------------------------------------------ */ + +/* Nexthop register */ +static void zread_rnh_register(ZAPI_HANDLER_ARGS) +{ + struct rnh *rnh; + struct stream *s; + struct prefix p; + unsigned short l = 0; + uint8_t connected = 0; + uint8_t resolve_via_default; + bool exist; + bool flag_changed = false; + uint8_t orig_flags; + safi_t safi; + + if (IS_ZEBRA_DEBUG_NHT) + zlog_debug( + "rnh_register msg from client %s: hdr->length=%d vrf=%u", + zebra_route_string(client->proto), hdr->length, + zvrf->vrf->vrf_id); + + s = msg; + + if (!client->nh_reg_time) + client->nh_reg_time = monotime(NULL); + + while (l < hdr->length) { + STREAM_GETC(s, connected); + STREAM_GETC(s, resolve_via_default); + STREAM_GETW(s, safi); + STREAM_GETW(s, p.family); + STREAM_GETC(s, p.prefixlen); + l += 7; + if (p.family == AF_INET) { + client->v4_nh_watch_add_cnt++; + if (p.prefixlen > IPV4_MAX_BITLEN) { + zlog_debug( + "%s: Specified prefix hdr->length %d is too large for a v4 address", + __func__, p.prefixlen); + return; + } + STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN); + l += IPV4_MAX_BYTELEN; + } else if (p.family == AF_INET6) { + client->v6_nh_watch_add_cnt++; + if (p.prefixlen > IPV6_MAX_BITLEN) { + zlog_debug( + "%s: Specified prefix hdr->length %d is to large for a v6 address", + __func__, p.prefixlen); + return; + } + STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN); + l += IPV6_MAX_BYTELEN; + } else { + flog_err( + EC_ZEBRA_UNKNOWN_FAMILY, + "rnh_register: Received unknown family type %d", + p.family); + return; + } + rnh = zebra_add_rnh(&p, zvrf_id(zvrf), safi, &exist); + if (!rnh) + return; + + orig_flags = rnh->flags; + if (connected && !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) + SET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED); + else if (!connected + && CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) + UNSET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED); + + if (resolve_via_default) + SET_FLAG(rnh->flags, ZEBRA_NHT_RESOLVE_VIA_DEFAULT); + + if (orig_flags != rnh->flags) + flag_changed = true; + + /* Anything not AF_INET/INET6 has been filtered out above */ + if (!exist || flag_changed) + zebra_evaluate_rnh(zvrf, family2afi(p.family), 1, &p, + safi); + + zebra_add_rnh_client(rnh, client, zvrf_id(zvrf)); + } + +stream_failure: + return; +} + +/* Nexthop register */ +static void zread_rnh_unregister(ZAPI_HANDLER_ARGS) +{ + struct rnh *rnh; + struct stream *s; + struct prefix p; + unsigned short l = 0; + safi_t safi; + + if (IS_ZEBRA_DEBUG_NHT) + zlog_debug( + "rnh_unregister msg from client %s: hdr->length=%d vrf: %u", + zebra_route_string(client->proto), hdr->length, + zvrf->vrf->vrf_id); + + s = msg; + + while (l < hdr->length) { + uint8_t ignore; + + STREAM_GETC(s, ignore); + if (ignore != 0) + goto stream_failure; + STREAM_GETC(s, ignore); + if (ignore != 0) + goto stream_failure; + + STREAM_GETW(s, safi); + STREAM_GETW(s, p.family); + STREAM_GETC(s, p.prefixlen); + l += 7; + if (p.family == AF_INET) { + client->v4_nh_watch_rem_cnt++; + if (p.prefixlen > IPV4_MAX_BITLEN) { + zlog_debug( + "%s: Specified prefix hdr->length %d is to large for a v4 address", + __func__, p.prefixlen); + return; + } + STREAM_GET(&p.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN); + l += IPV4_MAX_BYTELEN; + } else if (p.family == AF_INET6) { + client->v6_nh_watch_rem_cnt++; + if (p.prefixlen > IPV6_MAX_BITLEN) { + zlog_debug( + "%s: Specified prefix hdr->length %d is to large for a v6 address", + __func__, p.prefixlen); + return; + } + STREAM_GET(&p.u.prefix6, s, IPV6_MAX_BYTELEN); + l += IPV6_MAX_BYTELEN; + } else { + flog_err( + EC_ZEBRA_UNKNOWN_FAMILY, + "rnh_register: Received unknown family type %d", + p.family); + return; + } + rnh = zebra_lookup_rnh(&p, zvrf_id(zvrf), safi); + if (rnh) { + client->nh_dereg_time = monotime(NULL); + zebra_remove_rnh_client(rnh, client); + } + } +stream_failure: + return; +} + +#define ZEBRA_MIN_FEC_LENGTH 5 + +/* FEC register */ +static void zread_fec_register(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + unsigned short l = 0; + struct prefix p; + uint16_t flags; + uint32_t label = MPLS_INVALID_LABEL; + uint32_t label_index = MPLS_INVALID_LABEL_INDEX; + + s = msg; + zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT); + + /* + * The minimum amount of data that can be sent for one fec + * registration + */ + if (hdr->length < ZEBRA_MIN_FEC_LENGTH) { + flog_err( + EC_ZEBRA_IRDP_LEN_MISMATCH, + "fec_register: Received a fec register of hdr->length %d, it is of insufficient size to properly decode", + hdr->length); + return; + } + + while (l < hdr->length) { + STREAM_GETW(s, flags); + memset(&p, 0, sizeof(p)); + STREAM_GETW(s, p.family); + if (p.family != AF_INET && p.family != AF_INET6) { + flog_err( + EC_ZEBRA_UNKNOWN_FAMILY, + "fec_register: Received unknown family type %d", + p.family); + return; + } + STREAM_GETC(s, p.prefixlen); + if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN) + || (p.family == AF_INET6 + && p.prefixlen > IPV6_MAX_BITLEN)) { + zlog_debug( + "%s: Specified prefix hdr->length: %d is to long for %d", + __func__, p.prefixlen, p.family); + return; + } + l += 5; + STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen)); + l += PSIZE(p.prefixlen); + if (flags & ZEBRA_FEC_REGISTER_LABEL) { + STREAM_GETL(s, label); + l += 4; + } else if (flags & ZEBRA_FEC_REGISTER_LABEL_INDEX) { + STREAM_GETL(s, label_index); + l += 4; + } + + zebra_mpls_fec_register(zvrf, &p, label, label_index, client); + } + +stream_failure: + return; +} + +/* FEC unregister */ +static void zread_fec_unregister(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + unsigned short l = 0; + struct prefix p; + uint16_t flags; + + s = msg; + zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT); + + /* + * The minimum amount of data that can be sent for one + * fec unregistration + */ + if (hdr->length < ZEBRA_MIN_FEC_LENGTH) { + flog_err( + EC_ZEBRA_IRDP_LEN_MISMATCH, + "fec_unregister: Received a fec unregister of hdr->length %d, it is of insufficient size to properly decode", + hdr->length); + return; + } + + while (l < hdr->length) { + STREAM_GETW(s, flags); + if (flags != 0) + goto stream_failure; + + memset(&p, 0, sizeof(p)); + STREAM_GETW(s, p.family); + if (p.family != AF_INET && p.family != AF_INET6) { + flog_err( + EC_ZEBRA_UNKNOWN_FAMILY, + "fec_unregister: Received unknown family type %d", + p.family); + return; + } + STREAM_GETC(s, p.prefixlen); + if ((p.family == AF_INET && p.prefixlen > IPV4_MAX_BITLEN) + || (p.family == AF_INET6 + && p.prefixlen > IPV6_MAX_BITLEN)) { + zlog_debug( + "%s: Received prefix hdr->length %d which is greater than %d can support", + __func__, p.prefixlen, p.family); + return; + } + l += 5; + STREAM_GET(&p.u.prefix, s, PSIZE(p.prefixlen)); + l += PSIZE(p.prefixlen); + zebra_mpls_fec_unregister(zvrf, &p, client); + } + +stream_failure: + return; +} + + +/* + * Register zebra server interface information. + * Send current all interface and address information. + */ +static void zread_interface_add(ZAPI_HANDLER_ARGS) +{ + struct vrf *vrf; + struct interface *ifp; + + vrf_id_t vrf_id = zvrf_id(zvrf); + if (vrf_id != VRF_DEFAULT && vrf_id != VRF_UNKNOWN) { + FOR_ALL_INTERFACES (zvrf->vrf, ifp) { + /* Skip pseudo interface. */ + if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE)) + continue; + + zsend_interface_add(client, ifp); + zsend_interface_link_params(client, ifp); + zsend_interface_addresses(client, ifp); + } + return; + } + + RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { + FOR_ALL_INTERFACES (vrf, ifp) { + /* Skip pseudo interface. */ + if (!CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE)) + continue; + + zsend_interface_add(client, ifp); + zsend_interface_link_params(client, ifp); + zsend_interface_addresses(client, ifp); + } + } +} + +/* Unregister zebra server interface information. */ +static void zread_interface_delete(ZAPI_HANDLER_ARGS) +{ +} + +/* + * Handle message requesting interface be set up or down. + */ +static void zread_interface_set_protodown(ZAPI_HANDLER_ARGS) +{ + ifindex_t ifindex; + struct interface *ifp; + char down; + enum protodown_reasons reason; + + STREAM_GETL(msg, ifindex); + STREAM_GETC(msg, down); + + /* set ifdown */ + ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), ifindex); + + if (!ifp) { + zlog_warn( + "Cannot set protodown %s for interface %u; does not exist", + down ? "on" : "off", ifindex); + + return; + } + + switch (client->proto) { + case ZEBRA_ROUTE_VRRP: + reason = ZEBRA_PROTODOWN_VRRP; + break; + case ZEBRA_ROUTE_SHARP: + reason = ZEBRA_PROTODOWN_SHARP; + break; + default: + reason = 0; + break; + } + + zebra_if_set_protodown(ifp, down, reason); + +stream_failure: + return; +} + +bool zserv_nexthop_num_warn(const char *caller, const struct prefix *p, + const unsigned int nexthop_num) +{ + if (nexthop_num > zrouter.multipath_num) { + char buff[PREFIX2STR_BUFFER]; + + if (p) + prefix2str(p, buff, sizeof(buff)); + + flog_warn( + EC_ZEBRA_MORE_NH_THAN_MULTIPATH, + "%s: Prefix %s has %d nexthops, but we can only use the first %d", + caller, (p ? buff : "(NULL)"), nexthop_num, + zrouter.multipath_num); + return true; + } + + return false; +} + +/* + * Create a new nexthop based on a zapi nexthop. + */ +static struct nexthop *nexthop_from_zapi(const struct zapi_nexthop *api_nh, + uint32_t flags, struct prefix *p, + uint16_t backup_nexthop_num) +{ + struct nexthop *nexthop = NULL; + struct interface *ifp; + int i; + char nhbuf[INET6_ADDRSTRLEN] = ""; + + switch (api_nh->type) { + case NEXTHOP_TYPE_IFINDEX: + nexthop = nexthop_from_ifindex(api_nh->ifindex, api_nh->vrf_id); + break; + case NEXTHOP_TYPE_IPV4: + if (IS_ZEBRA_DEBUG_RECV) { + inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf, + sizeof(nhbuf)); + zlog_debug("%s: nh=%s, vrf_id=%d", __func__, + nhbuf, api_nh->vrf_id); + } + nexthop = nexthop_from_ipv4(&api_nh->gate.ipv4, NULL, + api_nh->vrf_id); + break; + case NEXTHOP_TYPE_IPV4_IFINDEX: + if (IS_ZEBRA_DEBUG_RECV) { + inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf, + sizeof(nhbuf)); + zlog_debug("%s: nh=%s, vrf_id=%d, ifindex=%d", + __func__, nhbuf, api_nh->vrf_id, + api_nh->ifindex); + } + + nexthop = nexthop_from_ipv4_ifindex( + &api_nh->gate.ipv4, NULL, api_nh->ifindex, + api_nh->vrf_id); + + /* Special handling for IPv4 routes sourced from EVPN: + * the nexthop and associated MAC need to be installed. + */ + if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_EVPN)) { + SET_FLAG(nexthop->flags, NEXTHOP_FLAG_EVPN); + nexthop->rmac = api_nh->rmac; + } + break; + case NEXTHOP_TYPE_IPV6: + if (IS_ZEBRA_DEBUG_RECV) { + inet_ntop(AF_INET6, &api_nh->gate.ipv6, nhbuf, + sizeof(nhbuf)); + zlog_debug("%s: nh=%s, vrf_id=%d", __func__, + nhbuf, api_nh->vrf_id); + } + nexthop = nexthop_from_ipv6(&api_nh->gate.ipv6, api_nh->vrf_id); + break; + case NEXTHOP_TYPE_IPV6_IFINDEX: + if (IS_ZEBRA_DEBUG_RECV) { + inet_ntop(AF_INET6, &api_nh->gate.ipv6, nhbuf, + sizeof(nhbuf)); + zlog_debug("%s: nh=%s, vrf_id=%d, ifindex=%d", + __func__, nhbuf, api_nh->vrf_id, + api_nh->ifindex); + } + nexthop = nexthop_from_ipv6_ifindex(&api_nh->gate.ipv6, + api_nh->ifindex, + api_nh->vrf_id); + + /* Special handling for IPv6 routes sourced from EVPN: + * the nexthop and associated MAC need to be installed. + */ + if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_EVPN)) { + SET_FLAG(nexthop->flags, NEXTHOP_FLAG_EVPN); + nexthop->rmac = api_nh->rmac; + } + break; + case NEXTHOP_TYPE_BLACKHOLE: + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: nh blackhole %d", + __func__, api_nh->bh_type); + + nexthop = + nexthop_from_blackhole(api_nh->bh_type, api_nh->vrf_id); + break; + } + + /* Return early if we couldn't process the zapi nexthop */ + if (nexthop == NULL) { + goto done; + } + + /* Mark nexthop as onlink either if client has explicitly told us + * to or if the nexthop is on an 'unnumbered' interface. + */ + if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_ONLINK)) + SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); + else if (api_nh->type == NEXTHOP_TYPE_IPV4_IFINDEX) { + ifp = if_lookup_by_index(api_nh->ifindex, api_nh->vrf_id); + if (ifp && connected_is_unnumbered(ifp)) + SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); + } + + if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_WEIGHT)) + nexthop->weight = api_nh->weight; + + if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP)) { + /* Validate count */ + if (api_nh->backup_num > NEXTHOP_MAX_BACKUPS) { + if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT) + zlog_debug("%s: invalid backup nh count %d", + __func__, api_nh->backup_num); + nexthop_free(nexthop); + nexthop = NULL; + goto done; + } + + /* Copy backup info */ + SET_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP); + nexthop->backup_num = api_nh->backup_num; + + for (i = 0; i < api_nh->backup_num; i++) { + /* Validate backup index */ + if (api_nh->backup_idx[i] < backup_nexthop_num) { + nexthop->backup_idx[i] = api_nh->backup_idx[i]; + } else { + if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT) + zlog_debug("%s: invalid backup nh idx %d", + __func__, + api_nh->backup_idx[i]); + nexthop_free(nexthop); + nexthop = NULL; + goto done; + } + } + } + +done: + return nexthop; +} + +static bool zapi_read_nexthops(struct zserv *client, struct prefix *p, + struct zapi_nexthop *nhops, uint32_t flags, + uint32_t message, uint16_t nexthop_num, + uint16_t backup_nh_num, + struct nexthop_group **png, + struct nhg_backup_info **pbnhg) +{ + struct nexthop_group *ng = NULL; + struct nhg_backup_info *bnhg = NULL; + uint16_t i; + struct nexthop *last_nh = NULL; + + assert(!(png && pbnhg)); + + if (png) + ng = nexthop_group_new(); + + if (pbnhg && backup_nh_num > 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: adding %d backup nexthops", __func__, + backup_nh_num); + + bnhg = zebra_nhg_backup_alloc(); + } + + /* + * TBD should _all_ of the nexthop add operations use + * api_nh->vrf_id instead of re->vrf_id ? I only changed + * for cases NEXTHOP_TYPE_IPV4 and NEXTHOP_TYPE_IPV6. + */ + for (i = 0; i < nexthop_num; i++) { + struct nexthop *nexthop; + enum lsp_types_t label_type; + char nhbuf[NEXTHOP_STRLEN]; + char labelbuf[MPLS_LABEL_STRLEN]; + struct zapi_nexthop *api_nh = &nhops[i]; + + /* Convert zapi nexthop */ + nexthop = nexthop_from_zapi(api_nh, flags, p, backup_nh_num); + if (!nexthop) { + flog_warn( + EC_ZEBRA_NEXTHOP_CREATION_FAILED, + "%s: Nexthops Specified: %u(%u) but we failed to properly create one", + __func__, nexthop_num, i); + if (ng) + nexthop_group_delete(&ng); + if (bnhg) + zebra_nhg_backup_free(&bnhg); + return false; + } + + if (bnhg + && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP)) { + if (IS_ZEBRA_DEBUG_RECV) { + nexthop2str(nexthop, nhbuf, sizeof(nhbuf)); + zlog_debug("%s: backup nh %s with BACKUP flag!", + __func__, nhbuf); + } + UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP); + nexthop->backup_num = 0; + } + + if (CHECK_FLAG(message, ZAPI_MESSAGE_SRTE)) { + SET_FLAG(nexthop->flags, NEXTHOP_FLAG_SRTE); + nexthop->srte_color = api_nh->srte_color; + } + + /* Labels for MPLS BGP-LU or Segment Routing or EVPN */ + if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_LABEL) + && api_nh->type != NEXTHOP_TYPE_IFINDEX + && api_nh->type != NEXTHOP_TYPE_BLACKHOLE + && api_nh->label_num > 0) { + + /* If label type was passed, use it */ + if (api_nh->label_type) + label_type = api_nh->label_type; + else + label_type = + lsp_type_from_re_type(client->proto); + + nexthop_add_labels(nexthop, label_type, + api_nh->label_num, + &api_nh->labels[0]); + } + + if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_SEG6LOCAL) + && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: adding seg6local action %s", + __func__, + seg6local_action2str( + api_nh->seg6local_action)); + + nexthop_add_srv6_seg6local(nexthop, + api_nh->seg6local_action, + &api_nh->seg6local_ctx); + } + + if (CHECK_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_SEG6) + && api_nh->type != NEXTHOP_TYPE_BLACKHOLE) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: adding seg6", __func__); + + nexthop_add_srv6_seg6(nexthop, &api_nh->seg6_segs[0], + api_nh->seg_num); + } + + if (IS_ZEBRA_DEBUG_RECV) { + labelbuf[0] = '\0'; + nhbuf[0] = '\0'; + + nexthop2str(nexthop, nhbuf, sizeof(nhbuf)); + + if (nexthop->nh_label && + nexthop->nh_label->num_labels > 0) { + mpls_label2str(nexthop->nh_label->num_labels, + nexthop->nh_label->label, + labelbuf, sizeof(labelbuf), + nexthop->nh_label_type, false); + } + + zlog_debug("%s: nh=%s, vrf_id=%d %s", + __func__, nhbuf, api_nh->vrf_id, labelbuf); + } + + if (ng) { + /* Add new nexthop to temporary list. This list is + * canonicalized - sorted - so that it can be hashed + * later in route processing. We expect that the sender + * has sent the list sorted, and the zapi client api + * attempts to enforce that, so this should be + * inexpensive - but it is necessary to support shared + * nexthop-groups. + */ + nexthop_group_add_sorted(ng, nexthop); + } + if (bnhg) { + /* Note that the order of the backup nexthops is + * significant, so we don't sort this list as we do the + * primary nexthops, we just append. + */ + if (last_nh) + NEXTHOP_APPEND(last_nh, nexthop); + else + bnhg->nhe->nhg.nexthop = nexthop; + + last_nh = nexthop; + } + } + + + /* succesfully read, set caller pointers now */ + if (png) + *png = ng; + + if (pbnhg) + *pbnhg = bnhg; + + return true; +} + +static int zapi_nhg_decode(struct stream *s, int cmd, struct zapi_nhg *api_nhg) +{ + uint16_t i; + struct zapi_nexthop *znh; + + STREAM_GETW(s, api_nhg->proto); + STREAM_GETL(s, api_nhg->id); + + if (cmd == ZEBRA_NHG_DEL) + goto done; + + STREAM_GETW(s, api_nhg->resilience.buckets); + STREAM_GETL(s, api_nhg->resilience.idle_timer); + STREAM_GETL(s, api_nhg->resilience.unbalanced_timer); + + /* Nexthops */ + STREAM_GETW(s, api_nhg->nexthop_num); + + if (zserv_nexthop_num_warn(__func__, NULL, api_nhg->nexthop_num)) + return -1; + + if (api_nhg->nexthop_num <= 0) { + flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED, + "%s: No nexthops sent", __func__); + return -1; + } + + for (i = 0; i < api_nhg->nexthop_num; i++) { + znh = &((api_nhg->nexthops)[i]); + + if (zapi_nexthop_decode(s, znh, 0, 0) != 0) { + flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED, + "%s: Nexthop creation failed", __func__); + return -1; + } + } + + /* Backup Nexthops */ + STREAM_GETW(s, api_nhg->backup_nexthop_num); + + if (zserv_nexthop_num_warn(__func__, NULL, api_nhg->backup_nexthop_num)) + return -1; + + for (i = 0; i < api_nhg->backup_nexthop_num; i++) { + znh = &((api_nhg->backup_nexthops)[i]); + + if (zapi_nexthop_decode(s, znh, 0, 0) != 0) { + flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED, + "%s: Backup Nexthop creation failed", + __func__); + return -1; + } + } + +done: + return 0; + +stream_failure: + flog_warn( + EC_ZEBRA_NEXTHOP_CREATION_FAILED, + "%s: Nexthop Group decode failed with some sort of stream read failure", + __func__); + return -1; +} + +static void zread_nhg_del(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_nhg api_nhg = {}; + struct nhg_hash_entry *nhe; + + s = msg; + if (zapi_nhg_decode(s, hdr->command, &api_nhg) < 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to decode zapi_nhg sent", + __func__); + return; + } + + /* + * Delete the received nhg id + */ + nhe = zebra_nhg_proto_del(api_nhg.id, api_nhg.proto); + + if (nhe) { + zebra_nhg_decrement_ref(nhe); + zsend_nhg_notify(api_nhg.proto, client->instance, + client->session_id, api_nhg.id, + ZAPI_NHG_REMOVED); + } else + zsend_nhg_notify(api_nhg.proto, client->instance, + client->session_id, api_nhg.id, + ZAPI_NHG_REMOVE_FAIL); +} + +static void zread_nhg_add(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_nhg api_nhg = {}; + struct nexthop_group *nhg = NULL; + struct nhg_backup_info *bnhg = NULL; + struct nhg_hash_entry *nhe; + + s = msg; + if (zapi_nhg_decode(s, hdr->command, &api_nhg) < 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to decode zapi_nhg sent", + __func__); + return; + } + + if ((!zapi_read_nexthops(client, NULL, api_nhg.nexthops, 0, 0, + api_nhg.nexthop_num, + api_nhg.backup_nexthop_num, &nhg, NULL)) + || (!zapi_read_nexthops(client, NULL, api_nhg.backup_nexthops, 0, 0, + api_nhg.backup_nexthop_num, + api_nhg.backup_nexthop_num, NULL, &bnhg))) { + + flog_warn(EC_ZEBRA_NEXTHOP_CREATION_FAILED, + "%s: Nexthop Group Creation failed", __func__); + + /* Free any local allocations */ + nexthop_group_delete(&nhg); + zebra_nhg_backup_free(&bnhg); + + return; + } + + /* Create a temporary nhe */ + nhe = zebra_nhg_alloc(); + nhe->id = api_nhg.id; + nhe->type = api_nhg.proto; + nhe->zapi_instance = client->instance; + nhe->zapi_session = client->session_id; + + /* Take over the list(s) of nexthops */ + nhe->nhg.nexthop = nhg->nexthop; + nhg->nexthop = NULL; + + nhe->nhg.nhgr = api_nhg.resilience; + + if (bnhg) { + nhe->backup_info = bnhg; + bnhg = NULL; + } + + /* + * TODO: + * Assume fully resolved for now and install. + * Resolution is going to need some more work. + */ + + /* Enqueue to workqueue for processing */ + rib_queue_nhe_add(nhe); + + /* Free any local allocations */ + nexthop_group_delete(&nhg); + zebra_nhg_backup_free(&bnhg); + +} + +static void zread_route_add(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_route api; + afi_t afi; + struct prefix_ipv6 *src_p = NULL; + struct route_entry *re; + struct nexthop_group *ng = NULL; + struct nhg_backup_info *bnhg = NULL; + int ret; + vrf_id_t vrf_id; + struct nhg_hash_entry nhe, *n = NULL; + + s = msg; + if (zapi_route_decode(s, &api) < 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to decode zapi_route sent", + __func__); + return; + } + + vrf_id = zvrf_id(zvrf); + + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: p=(%u:%u)%pFX, msg flags=0x%x, flags=0x%x", + __func__, vrf_id, api.tableid, &api.prefix, + (int)api.message, api.flags); + + /* Allocate new route. */ + re = zebra_rib_route_entry_new( + vrf_id, api.type, api.instance, api.flags, api.nhgid, + api.tableid ? api.tableid : zvrf->table_id, api.metric, api.mtu, + api.distance, api.tag); + + if (!CHECK_FLAG(api.message, ZAPI_MESSAGE_NHG) + && (!CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP) + || api.nexthop_num == 0)) { + flog_warn( + EC_ZEBRA_RX_ROUTE_NO_NEXTHOPS, + "%s: received a route without nexthops for prefix %pFX from client %s", + __func__, &api.prefix, + zebra_route_string(client->proto)); + + XFREE(MTYPE_RE, re); + return; + } + + /* Report misuse of the backup flag */ + if (CHECK_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS) + && api.backup_nexthop_num == 0) { + if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_EVENT) + zlog_debug( + "%s: client %s: BACKUP flag set but no backup nexthops, prefix %pFX", + __func__, zebra_route_string(client->proto), + &api.prefix); + } + + if (!re->nhe_id + && (!zapi_read_nexthops(client, &api.prefix, api.nexthops, + api.flags, api.message, api.nexthop_num, + api.backup_nexthop_num, &ng, NULL) + || !zapi_read_nexthops(client, &api.prefix, api.backup_nexthops, + api.flags, api.message, + api.backup_nexthop_num, + api.backup_nexthop_num, NULL, &bnhg))) { + + nexthop_group_delete(&ng); + zebra_nhg_backup_free(&bnhg); + XFREE(MTYPE_RE, re); + return; + } + + if (CHECK_FLAG(api.message, ZAPI_MESSAGE_OPAQUE)) { + re->opaque = + XMALLOC(MTYPE_RE_OPAQUE, + sizeof(struct re_opaque) + api.opaque.length); + re->opaque->length = api.opaque.length; + memcpy(re->opaque->data, api.opaque.data, re->opaque->length); + } + + afi = family2afi(api.prefix.family); + if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) { + flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI, + "%s: Received SRC Prefix but afi is not v6", + __func__); + nexthop_group_delete(&ng); + zebra_nhg_backup_free(&bnhg); + XFREE(MTYPE_RE_OPAQUE, re->opaque); + XFREE(MTYPE_RE, re); + return; + } + if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) + src_p = &api.src_prefix; + + if (api.safi != SAFI_UNICAST && api.safi != SAFI_MULTICAST) { + flog_warn(EC_LIB_ZAPI_MISSMATCH, + "%s: Received safi: %d but we can only accept UNICAST or MULTICAST", + __func__, api.safi); + nexthop_group_delete(&ng); + zebra_nhg_backup_free(&bnhg); + XFREE(MTYPE_RE_OPAQUE, re->opaque); + XFREE(MTYPE_RE, re); + return; + } + + /* + * If we have an ID, this proto owns the NHG it sent along with the + * route, so we just send the ID into rib code with it. + * + * Havent figured out how to handle backup NHs with this yet, so lets + * keep that separate. + * Include backup info with the route. We use a temporary nhe here; + * if this is a new/unknown nhe, a new copy will be allocated + * and stored. + */ + if (!re->nhe_id) { + zebra_nhe_init(&nhe, afi, ng->nexthop); + nhe.nhg.nexthop = ng->nexthop; + nhe.backup_info = bnhg; + n = zebra_nhe_copy(&nhe, 0); + } + ret = rib_add_multipath_nhe(afi, api.safi, &api.prefix, src_p, re, n, + false); + + /* + * rib_add_multipath_nhe only fails in a couple spots + * and in those spots we have not freed memory + */ + if (ret == -1) { + client->error_cnt++; + XFREE(MTYPE_RE_OPAQUE, re->opaque); + XFREE(MTYPE_RE, re); + } + + /* At this point, these allocations are not needed: 're' has been + * retained or freed, and if 're' still exists, it is using + * a reference to a shared group object. + */ + nexthop_group_delete(&ng); + if (bnhg) + zebra_nhg_backup_free(&bnhg); + + /* Stats */ + switch (api.prefix.family) { + case AF_INET: + if (ret == 0) + client->v4_route_add_cnt++; + else if (ret == 1) + client->v4_route_upd8_cnt++; + break; + case AF_INET6: + if (ret == 0) + client->v6_route_add_cnt++; + else if (ret == 1) + client->v6_route_upd8_cnt++; + break; + } +} + +void zapi_re_opaque_free(struct re_opaque *opaque) +{ + XFREE(MTYPE_RE_OPAQUE, opaque); +} + +static void zread_route_del(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_route api; + afi_t afi; + struct prefix_ipv6 *src_p = NULL; + uint32_t table_id; + + s = msg; + if (zapi_route_decode(s, &api) < 0) + return; + + afi = family2afi(api.prefix.family); + if (afi != AFI_IP6 && CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) { + flog_warn(EC_ZEBRA_RX_SRCDEST_WRONG_AFI, + "%s: Received a src prefix while afi is not v6", + __func__); + return; + } + if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) + src_p = &api.src_prefix; + + if (api.tableid) + table_id = api.tableid; + else + table_id = zvrf->table_id; + + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: p=(%u:%u)%pFX, msg flags=0x%x, flags=0x%x", + __func__, zvrf_id(zvrf), table_id, &api.prefix, + (int)api.message, api.flags); + + rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance, + api.flags, &api.prefix, src_p, NULL, 0, table_id, api.metric, + api.distance, false); + + /* Stats */ + switch (api.prefix.family) { + case AF_INET: + client->v4_route_del_cnt++; + break; + case AF_INET6: + client->v6_route_del_cnt++; + break; + } +} + +/* MRIB Nexthop lookup for IPv4. */ +static void zread_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS) +{ + struct ipaddr addr; + struct route_entry *re = NULL; + union g_addr gaddr; + + STREAM_GET_IPADDR(msg, &addr); + + switch (addr.ipa_type) { + case IPADDR_V4: + gaddr.ipv4 = addr.ipaddr_v4; + re = rib_match_multicast(AFI_IP, zvrf_id(zvrf), &gaddr, NULL); + break; + case IPADDR_V6: + gaddr.ipv6 = addr.ipaddr_v6; + re = rib_match_multicast(AFI_IP6, zvrf_id(zvrf), &gaddr, NULL); + break; + case IPADDR_NONE: + /* ??? */ + goto stream_failure; + } + + zsend_nexthop_lookup_mrib(client, &addr, re, zvrf); + +stream_failure: + return; +} + +/* Register zebra server router-id information. Send current router-id */ +static void zread_router_id_add(ZAPI_HANDLER_ARGS) +{ + afi_t afi; + struct prefix p; + struct prefix zero; + + STREAM_GETW(msg, afi); + + if (afi <= AFI_UNSPEC || afi >= AFI_MAX) { + zlog_warn( + "Invalid AFI %u while registering for router ID notifications", + afi); + goto stream_failure; + } + + /* Router-id information is needed. */ + vrf_bitmap_set(&client->ridinfo[afi], zvrf_id(zvrf)); + + router_id_get(afi, &p, zvrf); + + /* + * If we have not officially setup a router-id let's not + * tell the upper level protocol about it yet. + */ + memset(&zero, 0, sizeof(zero)); + if ((p.family == AF_INET && p.u.prefix4.s_addr == INADDR_ANY) + || (p.family == AF_INET6 + && memcmp(&p.u.prefix6, &zero.u.prefix6, + sizeof(struct in6_addr)) + == 0)) + return; + + zsend_router_id_update(client, afi, &p, zvrf_id(zvrf)); + +stream_failure: + return; +} + +/* Unregister zebra server router-id information. */ +static void zread_router_id_delete(ZAPI_HANDLER_ARGS) +{ + afi_t afi; + + STREAM_GETW(msg, afi); + + if (afi <= AFI_UNSPEC || afi >= AFI_MAX) { + zlog_warn( + "Invalid AFI %u while unregistering from router ID notifications", + afi); + goto stream_failure; + } + + vrf_bitmap_unset(&client->ridinfo[afi], zvrf_id(zvrf)); + +stream_failure: + return; +} + +static void zsend_capabilities(struct zserv *client, struct zebra_vrf *zvrf) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_CAPABILITIES, zvrf->vrf->vrf_id); + stream_putl(s, vrf_get_backend()); + stream_putc(s, mpls_enabled); + stream_putl(s, zrouter.multipath_num); + stream_putc(s, zebra_mlag_get_role()); + stream_putc(s, zrouter.v6_with_v4_nexthop); + stream_putw_at(s, 0, stream_get_endp(s)); + zserv_send_message(client, s); +} + +void zsend_capabilities_all_clients(void) +{ + struct listnode *node, *nnode; + struct zebra_vrf *zvrf; + struct zserv *client; + + zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT); + for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) { + /* Do not send unsolicited messages to synchronous clients. */ + if (client->synchronous) + continue; + + zsend_capabilities(client, zvrf); + } +} + +/* Tie up route-type and client->sock */ +static void zread_hello(ZAPI_HANDLER_ARGS) +{ + /* type of protocol (lib/zebra.h) */ + uint8_t proto; + unsigned short instance; + uint8_t notify; + uint8_t synchronous; + uint32_t session_id; + + STREAM_GETC(msg, proto); + STREAM_GETW(msg, instance); + STREAM_GETL(msg, session_id); + STREAM_GETC(msg, notify); + STREAM_GETC(msg, synchronous); + if (notify) + client->notify_owner = true; + + if (synchronous) + client->synchronous = true; + + /* accept only dynamic routing protocols */ + if ((proto < ZEBRA_ROUTE_MAX) && (proto > ZEBRA_ROUTE_CONNECT)) { + zlog_notice( + "client %d says hello and bids fair to announce only %s routes vrf=%u", + client->sock, zebra_route_string(proto), + zvrf->vrf->vrf_id); + if (instance) + zlog_notice("client protocol instance %d", instance); + + client->proto = proto; + client->instance = instance; + client->session_id = session_id; + + /* Graceful restart processing for client connect */ + zebra_gr_client_reconnect(client); + } + + if (!client->synchronous) { + zsend_capabilities(client, zvrf); + zebra_vrf_update_all(client); + } +stream_failure: + return; +} + +/* Unregister all information in a VRF. */ +static void zread_vrf_unregister(ZAPI_HANDLER_ARGS) +{ + int i; + afi_t afi; + + for (afi = AFI_IP; afi < AFI_MAX; afi++) { + for (i = 0; i < ZEBRA_ROUTE_MAX; i++) + vrf_bitmap_unset(&client->redist[afi][i], + zvrf_id(zvrf)); + vrf_bitmap_unset(&client->redist_default[afi], zvrf_id(zvrf)); + vrf_bitmap_unset(&client->ridinfo[afi], zvrf_id(zvrf)); + vrf_bitmap_unset(&client->nhrp_neighinfo[afi], zvrf_id(zvrf)); + } +} + +/* + * Validate incoming zapi mpls lsp / labels message + */ +static int zapi_labels_validate(const struct zapi_labels *zl) +{ + int ret = -1; + int i, j, idx; + uint32_t bits[8]; + uint32_t ival; + const struct zapi_nexthop *znh; + + /* Validate backup info: no duplicates for a single primary */ + if (zl->backup_nexthop_num == 0) { + ret = 0; + goto done; + } + + for (j = 0; j < zl->nexthop_num; j++) { + znh = &zl->nexthops[j]; + + memset(bits, 0, sizeof(bits)); + + for (i = 0; i < znh->backup_num; i++) { + idx = znh->backup_idx[i] / 32; + + ival = 1 << znh->backup_idx[i] % 32; + + /* Check whether value is already used */ + if (ival & bits[idx]) { + /* Fail */ + + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: invalid zapi mpls message: duplicate backup nexthop index %d", + __func__, + znh->backup_idx[i]); + goto done; + } + + /* Mark index value */ + bits[idx] |= ival; + } + } + + ret = 0; + +done: + + return ret; +} + +/* + * Handle request to create an MPLS LSP. + * + * A single message can fully specify an LSP with multiple nexthops. + * + * When the optional ZAPI_LABELS_FTN flag is set, the specified FEC (route) is + * updated to use the received label(s). + */ +static void zread_mpls_labels_add(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_labels zl; + + /* Get input stream. */ + s = msg; + if (zapi_labels_decode(s, &zl) < 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to decode zapi_labels sent", + __func__); + return; + } + + if (!mpls_enabled) + return; + + /* Validate; will debug on failure */ + if (zapi_labels_validate(&zl) < 0) + return; + + mpls_zapi_labels_process(true, zvrf, &zl); +} + +/* + * Handle request to delete an MPLS LSP. + * + * An LSP is identified by its type and local label. When the received message + * doesn't contain any nexthop, the whole LSP is deleted. Otherwise, only the + * listed LSP nexthops (aka NHLFEs) are deleted. + * + * When the optional ZAPI_LABELS_FTN flag is set, the labels of the specified + * FEC (route) nexthops are deleted. + */ +static void zread_mpls_labels_delete(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_labels zl; + + /* Get input stream. */ + s = msg; + if (zapi_labels_decode(s, &zl) < 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to decode zapi_labels sent", + __func__); + return; + } + + if (!mpls_enabled) + return; + + if (zl.nexthop_num > 0) { + mpls_zapi_labels_process(false /*delete*/, zvrf, &zl); + } else { + mpls_lsp_uninstall_all_vrf(zvrf, zl.type, zl.local_label); + + if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN)) + mpls_ftn_uninstall(zvrf, zl.type, &zl.route.prefix, + zl.route.type, zl.route.instance); + } +} + +/* + * Handle request to add an MPLS LSP or change an existing one. + * + * A single message can fully specify an LSP with multiple nexthops. + * + * When the optional ZAPI_LABELS_FTN flag is set, the specified FEC (route) is + * updated to use the received label(s). + * + * NOTE: zebra will use route replace semantics (make-before-break) to update + * the LSP in the forwarding plane if that's supported by the underlying + * platform. + */ +static void zread_mpls_labels_replace(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_labels zl; + + /* Get input stream. */ + s = msg; + if (zapi_labels_decode(s, &zl) < 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to decode zapi_labels sent", + __func__); + return; + } + + if (!mpls_enabled) + return; + + /* Validate; will debug on failure */ + if (zapi_labels_validate(&zl) < 0) + return; + + /* This removes everything, then re-adds from the client's + * zapi message. Since the LSP will be processed later, on this + * this same pthread, all of the changes will 'appear' at once. + */ + mpls_lsp_uninstall_all_vrf(zvrf, zl.type, zl.local_label); + if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN)) + mpls_ftn_uninstall(zvrf, zl.type, &zl.route.prefix, + zl.route.type, zl.route.instance); + + mpls_zapi_labels_process(true, zvrf, &zl); +} + +static void zread_sr_policy_set(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_sr_policy zp; + struct zapi_srte_tunnel *zt; + struct zebra_sr_policy *policy; + + /* Get input stream. */ + s = msg; + if (zapi_sr_policy_decode(s, &zp) < 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to decode zapi_sr_policy sent", + __func__); + return; + } + zt = &zp.segment_list; + if (zt->label_num < 1) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug( + "%s: SR-TE tunnel must contain at least one label", + __func__); + return; + } + + if (!mpls_enabled) + return; + + policy = zebra_sr_policy_find(zp.color, &zp.endpoint); + if (!policy) { + policy = zebra_sr_policy_add(zp.color, &zp.endpoint, zp.name); + policy->sock = client->sock; + } + /* TODO: per-VRF list of SR-TE policies. */ + policy->zvrf = zvrf; + + zebra_sr_policy_validate(policy, &zp.segment_list); +} + +static void zread_sr_policy_delete(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_sr_policy zp; + struct zebra_sr_policy *policy; + + /* Get input stream. */ + s = msg; + if (zapi_sr_policy_decode(s, &zp) < 0) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to decode zapi_sr_policy sent", + __func__); + return; + } + + if (!mpls_enabled) + return; + + policy = zebra_sr_policy_find(zp.color, &zp.endpoint); + if (!policy) { + if (IS_ZEBRA_DEBUG_RECV) + zlog_debug("%s: Unable to find SR-TE policy", __func__); + return; + } + + zebra_sr_policy_del(policy); +} + +int zsend_sr_policy_notify_status(uint32_t color, struct ipaddr *endpoint, + char *name, int status) +{ + struct zserv *client; + struct stream *s; + + client = zserv_find_client(ZEBRA_ROUTE_SRTE, 0); + if (!client) { + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug( + "Not notifying pathd about policy %s" + " status change to %d", + name, status); + return 0; + } + + if (IS_ZEBRA_DEBUG_PACKET) + zlog_debug( + "Notifying pathd about policy %s status change" + " to %d", + name, status); + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + stream_reset(s); + + zclient_create_header(s, ZEBRA_SR_POLICY_NOTIFY_STATUS, VRF_DEFAULT); + stream_putl(s, color); + stream_put_ipaddr(s, endpoint); + stream_write(s, name, SRTE_POLICY_NAME_MAX_LENGTH); + stream_putl(s, status); + + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +/* Send client close notify to client */ +int zsend_client_close_notify(struct zserv *client, struct zserv *closed_client) +{ + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_CLIENT_CLOSE_NOTIFY, VRF_DEFAULT); + + stream_putc(s, closed_client->proto); + stream_putw(s, closed_client->instance); + stream_putl(s, closed_client->session_id); + + stream_putw_at(s, 0, stream_get_endp(s)); + + return zserv_send_message(client, s); +} + +int zsend_srv6_manager_get_locator_chunk_response(struct zserv *client, + vrf_id_t vrf_id, + struct srv6_locator *loc) +{ + struct srv6_locator_chunk chunk = {}; + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + strlcpy(chunk.locator_name, loc->name, sizeof(chunk.locator_name)); + chunk.prefix = loc->prefix; + chunk.block_bits_length = loc->block_bits_length; + chunk.node_bits_length = loc->node_bits_length; + chunk.function_bits_length = loc->function_bits_length; + chunk.argument_bits_length = loc->argument_bits_length; + chunk.keep = 0; + chunk.proto = client->proto; + chunk.instance = client->instance; + chunk.flags = loc->flags; + + zclient_create_header(s, ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK, vrf_id); + zapi_srv6_locator_chunk_encode(s, &chunk); + stream_putw_at(s, 0, stream_get_endp(s)); + return zserv_send_message(client, s); +} + +/* Send response to a table manager connect request to client */ +static void zread_table_manager_connect(struct zserv *client, + struct stream *msg, vrf_id_t vrf_id) +{ + struct stream *s; + uint8_t proto; + uint16_t instance; + struct vrf *vrf = vrf_lookup_by_id(vrf_id); + + s = msg; + + /* Get data. */ + STREAM_GETC(s, proto); + STREAM_GETW(s, instance); + + /* accept only dynamic routing protocols */ + if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) { + flog_err(EC_ZEBRA_TM_WRONG_PROTO, + "client %d has wrong protocol %s", client->sock, + zebra_route_string(proto)); + zsend_table_manager_connect_response(client, vrf_id, 1); + return; + } + zlog_notice("client %d with vrf %s(%u) instance %u connected as %s", + client->sock, VRF_LOGNAME(vrf), vrf_id, instance, + zebra_route_string(proto)); + client->proto = proto; + client->instance = instance; + + /* + * Release previous labels of same protocol and instance. + * This is done in case it restarted from an unexpected shutdown. + */ + release_daemon_table_chunks(client); + + zsend_table_manager_connect_response(client, vrf_id, 0); + +stream_failure: + return; +} + +static void zread_label_manager_connect(struct zserv *client, + struct stream *msg, vrf_id_t vrf_id) +{ + struct stream *s; + /* type of protocol (lib/zebra.h) */ + uint8_t proto; + unsigned short instance; + + /* Get input stream. */ + s = msg; + + /* Get data. */ + STREAM_GETC(s, proto); + STREAM_GETW(s, instance); + + /* accept only dynamic routing protocols */ + if ((proto >= ZEBRA_ROUTE_MAX) || (proto <= ZEBRA_ROUTE_STATIC)) { + flog_err(EC_ZEBRA_TM_WRONG_PROTO, + "client %d has wrong protocol %s", client->sock, + zebra_route_string(proto)); + zsend_label_manager_connect_response(client, vrf_id, 1); + return; + } + + /* recall proto and instance in this socket */ + client->proto = proto; + client->instance = instance; + + /* call hook for connection using wrapper */ + lm_client_connect_call(client, vrf_id); + +stream_failure: + return; +} + +static void zread_get_label_chunk(struct zserv *client, struct stream *msg, + vrf_id_t vrf_id) +{ + struct stream *s; + uint8_t keep; + uint32_t size, base; + struct label_manager_chunk *lmc = NULL; + uint8_t proto; + unsigned short instance; + + /* Get input stream. */ + s = msg; + + /* Get data. */ + STREAM_GETC(s, proto); + STREAM_GETW(s, instance); + STREAM_GETC(s, keep); + STREAM_GETL(s, size); + STREAM_GETL(s, base); + + assert(proto == client->proto && instance == client->instance); + + /* call hook to get a chunk using wrapper */ + lm_get_chunk_call(&lmc, client, keep, size, base, vrf_id); + +stream_failure: + return; +} + +static void zread_release_label_chunk(struct zserv *client, struct stream *msg) +{ + struct stream *s; + uint32_t start, end; + uint8_t proto; + unsigned short instance; + + /* Get input stream. */ + s = msg; + + /* Get data. */ + STREAM_GETC(s, proto); + STREAM_GETW(s, instance); + STREAM_GETL(s, start); + STREAM_GETL(s, end); + + assert(proto == client->proto && instance == client->instance); + + /* call hook to release a chunk using wrapper */ + lm_release_chunk_call(client, start, end); + +stream_failure: + return; +} + +static void zread_label_manager_request(ZAPI_HANDLER_ARGS) +{ + if (hdr->command == ZEBRA_LABEL_MANAGER_CONNECT + || hdr->command == ZEBRA_LABEL_MANAGER_CONNECT_ASYNC) + zread_label_manager_connect(client, msg, zvrf_id(zvrf)); + else { + if (hdr->command == ZEBRA_GET_LABEL_CHUNK) + zread_get_label_chunk(client, msg, zvrf_id(zvrf)); + else if (hdr->command == ZEBRA_RELEASE_LABEL_CHUNK) + zread_release_label_chunk(client, msg); + } +} + +static void zread_get_table_chunk(struct zserv *client, struct stream *msg, + struct zebra_vrf *zvrf) +{ + struct stream *s; + uint32_t size; + struct table_manager_chunk *tmc; + + /* Get input stream. */ + s = msg; + + /* Get data. */ + STREAM_GETL(s, size); + + tmc = assign_table_chunk(client->proto, client->instance, size, zvrf); + if (!tmc) + flog_err(EC_ZEBRA_TM_CANNOT_ASSIGN_CHUNK, + "%s: Unable to assign Table Chunk of size %u", + __func__, size); + else + zlog_debug("Assigned Table Chunk %u - %u", tmc->start, + tmc->end); + /* send response back */ + zsend_assign_table_chunk_response(client, zvrf_id(zvrf), tmc); + +stream_failure: + return; +} + +static void zread_release_table_chunk(struct zserv *client, struct stream *msg, + struct zebra_vrf *zvrf) +{ + struct stream *s; + uint32_t start, end; + + /* Get input stream. */ + s = msg; + + /* Get data. */ + STREAM_GETL(s, start); + STREAM_GETL(s, end); + + release_table_chunk(client->proto, client->instance, start, end, zvrf); + +stream_failure: + return; +} + +static void zread_table_manager_request(ZAPI_HANDLER_ARGS) +{ + /* to avoid sending other messages like ZEBRA_INTERFACE_UP */ + if (hdr->command == ZEBRA_TABLE_MANAGER_CONNECT) + zread_table_manager_connect(client, msg, zvrf_id(zvrf)); + else { + /* Sanity: don't allow 'unidentified' requests */ + if (!client->proto) { + flog_err( + EC_ZEBRA_TM_ALIENS, + "Got SRv6 request from an unidentified client"); + return; + } + if (hdr->command == ZEBRA_GET_TABLE_CHUNK) + zread_get_table_chunk(client, msg, zvrf); + else if (hdr->command == ZEBRA_RELEASE_TABLE_CHUNK) + zread_release_table_chunk(client, msg, zvrf); + } +} + +static void zread_srv6_manager_get_locator_chunk(struct zserv *client, + struct stream *msg, + vrf_id_t vrf_id) +{ + struct stream *s = msg; + uint16_t len; + char locator_name[SRV6_LOCNAME_SIZE] = {0}; + + /* Get data. */ + STREAM_GETW(s, len); + STREAM_GET(locator_name, s, len); + + /* call hook to get a chunk using wrapper */ + struct srv6_locator *loc = NULL; + srv6_manager_get_locator_chunk_call(&loc, client, locator_name, vrf_id); + +stream_failure: + return; +} + +static void zread_srv6_manager_release_locator_chunk(struct zserv *client, + struct stream *msg, + vrf_id_t vrf_id) +{ + struct stream *s = msg; + uint16_t len; + char locator_name[SRV6_LOCNAME_SIZE] = {0}; + + /* Get data. */ + STREAM_GETW(s, len); + STREAM_GET(locator_name, s, len); + + /* call hook to release a chunk using wrapper */ + srv6_manager_release_locator_chunk_call(client, locator_name, vrf_id); + +stream_failure: + return; +} + +static void zread_srv6_manager_request(ZAPI_HANDLER_ARGS) +{ + switch (hdr->command) { + case ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK: + zread_srv6_manager_get_locator_chunk(client, msg, + zvrf_id(zvrf)); + break; + case ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK: + zread_srv6_manager_release_locator_chunk(client, msg, + zvrf_id(zvrf)); + break; + default: + zlog_err("%s: unknown SRv6 Manager command", __func__); + break; + } +} + +static void zread_pseudowire(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + char ifname[INTERFACE_NAMSIZ]; + ifindex_t ifindex; + int type; + int af; + union g_addr nexthop; + uint32_t local_label; + uint32_t remote_label; + uint8_t flags; + union pw_protocol_fields data; + uint8_t protocol; + struct zebra_pw *pw; + + /* Get input stream. */ + s = msg; + + /* Get data. */ + STREAM_GET(ifname, s, INTERFACE_NAMSIZ); + ifname[INTERFACE_NAMSIZ - 1] = '\0'; + STREAM_GETL(s, ifindex); + STREAM_GETL(s, type); + STREAM_GETL(s, af); + switch (af) { + case AF_INET: + STREAM_GET(&nexthop.ipv4.s_addr, s, IPV4_MAX_BYTELEN); + break; + case AF_INET6: + STREAM_GET(&nexthop.ipv6, s, 16); + break; + default: + return; + } + STREAM_GETL(s, local_label); + STREAM_GETL(s, remote_label); + STREAM_GETC(s, flags); + STREAM_GET(&data, s, sizeof(data)); + protocol = client->proto; + + pw = zebra_pw_find(zvrf, ifname); + switch (hdr->command) { + case ZEBRA_PW_ADD: + if (pw) { + flog_warn(EC_ZEBRA_PSEUDOWIRE_EXISTS, + "%s: pseudowire %s already exists [%s]", + __func__, ifname, + zserv_command_string(hdr->command)); + return; + } + + zebra_pw_add(zvrf, ifname, protocol, client); + break; + case ZEBRA_PW_DELETE: + if (!pw) { + flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT, + "%s: pseudowire %s not found [%s]", __func__, + ifname, zserv_command_string(hdr->command)); + return; + } + + zebra_pw_del(zvrf, pw); + break; + case ZEBRA_PW_SET: + case ZEBRA_PW_UNSET: + if (!pw) { + flog_warn(EC_ZEBRA_PSEUDOWIRE_NONEXISTENT, + "%s: pseudowire %s not found [%s]", __func__, + ifname, zserv_command_string(hdr->command)); + return; + } + + switch (hdr->command) { + case ZEBRA_PW_SET: + pw->enabled = 1; + break; + case ZEBRA_PW_UNSET: + pw->enabled = 0; + break; + } + + zebra_pw_change(pw, ifindex, type, af, &nexthop, local_label, + remote_label, flags, &data); + break; + } + +stream_failure: + return; +} + +static void zread_interface_set_master(ZAPI_HANDLER_ARGS) +{ + struct interface *master; + struct interface *slave; + struct stream *s = msg; + int ifindex; + vrf_id_t vrf_id; + + STREAM_GETL(s, vrf_id); + STREAM_GETL(s, ifindex); + master = if_lookup_by_index(ifindex, vrf_id); + + STREAM_GETL(s, vrf_id); + STREAM_GETL(s, ifindex); + slave = if_lookup_by_index(ifindex, vrf_id); + + if (!master || !slave) + return; + + kernel_interface_set_master(master, slave); + +stream_failure: + return; +} + + +static void zread_vrf_label(ZAPI_HANDLER_ARGS) +{ + struct interface *ifp; + mpls_label_t nlabel; + afi_t afi; + struct stream *s; + struct zebra_vrf *def_zvrf; + enum lsp_types_t ltype; + + s = msg; + STREAM_GETL(s, nlabel); + STREAM_GETC(s, afi); + + if (!(IS_VALID_AFI(afi))) { + zlog_warn("Invalid AFI for VRF label: %u", afi); + return; + } + + if (nlabel == zvrf->label[afi]) { + /* + * Nothing to do here move along + */ + return; + } + + STREAM_GETC(s, ltype); + + if (zvrf->vrf->vrf_id != VRF_DEFAULT) + ifp = if_lookup_by_name(zvrf->vrf->name, zvrf->vrf->vrf_id); + else + ifp = if_lookup_by_name("lo", VRF_DEFAULT); + + if (!ifp) { + zlog_debug("Unable to find specified Interface for %s", + zvrf->vrf->name); + return; + } + + def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT); + + if (zvrf->label[afi] != MPLS_LABEL_NONE) { + afi_t scrubber; + bool really_remove; + + really_remove = true; + for (scrubber = AFI_IP; scrubber < AFI_MAX; scrubber++) { + if (scrubber == afi) + continue; + + if (zvrf->label[scrubber] == MPLS_LABEL_NONE) + continue; + + if (zvrf->label[afi] == zvrf->label[scrubber]) { + really_remove = false; + break; + } + } + + if (really_remove) + mpls_lsp_uninstall(def_zvrf, ltype, zvrf->label[afi], + NEXTHOP_TYPE_IFINDEX, NULL, + ifp->ifindex, false /*backup*/); + } + + if (nlabel != MPLS_LABEL_NONE) { + mpls_label_t out_label = MPLS_LABEL_IMPLICIT_NULL; + mpls_lsp_install(def_zvrf, ltype, nlabel, 1, &out_label, + NEXTHOP_TYPE_IFINDEX, NULL, ifp->ifindex); + } + + zvrf->label[afi] = nlabel; + zvrf->label_proto[afi] = client->proto; + +stream_failure: + return; +} + +static inline void zread_rule(ZAPI_HANDLER_ARGS) +{ + struct zebra_pbr_rule zpr; + struct stream *s; + uint32_t total, i; + + s = msg; + STREAM_GETL(s, total); + + for (i = 0; i < total; i++) { + memset(&zpr, 0, sizeof(zpr)); + + zpr.sock = client->sock; + zpr.rule.vrf_id = hdr->vrf_id; + + if (!zapi_pbr_rule_decode(s, &zpr.rule)) + goto stream_failure; + + strlcpy(zpr.ifname, zpr.rule.ifname, sizeof(zpr.ifname)); + + if ((zpr.rule.family != AF_INET) && + (zpr.rule.family != AF_INET6)) { + zlog_warn("Unsupported PBR source IP family: %s (%hhu)", + family2str(zpr.rule.family), zpr.rule.family); + return; + } + + /* + * Fixup filter src/dst IP addresses if they are unset + * because the netlink code currently obtains address family + * from them. Address family is used to specify which + * kernel database to use when adding/deleting rule. + * + * TBD: propagate zpr.rule.family into dataplane and + * netlink code so they can stop using filter src/dst addrs. + */ + if (!CHECK_FLAG(zpr.rule.filter.filter_bm, PBR_FILTER_SRC_IP)) + zpr.rule.filter.src_ip.family = zpr.rule.family; + if (!CHECK_FLAG(zpr.rule.filter.filter_bm, PBR_FILTER_DST_IP)) + zpr.rule.filter.dst_ip.family = zpr.rule.family; + + /* TBD delete below block when netlink code gets family from zpr.rule.family */ + if (!(zpr.rule.filter.src_ip.family == AF_INET + || zpr.rule.filter.src_ip.family == AF_INET6)) { + zlog_warn( + "Unsupported PBR source IP family: %s (%u)", + family2str(zpr.rule.filter.src_ip.family), + zpr.rule.filter.src_ip.family); + return; + } + if (!(zpr.rule.filter.dst_ip.family == AF_INET + || zpr.rule.filter.dst_ip.family == AF_INET6)) { + zlog_warn( + "Unsupported PBR destination IP family: %s (%u)", + family2str(zpr.rule.filter.dst_ip.family), + zpr.rule.filter.dst_ip.family); + return; + } + /* TBD delete above block when netlink code gets family from zpr.rule.family */ + + + zpr.vrf_id = zvrf->vrf->vrf_id; + if (hdr->command == ZEBRA_RULE_ADD) + zebra_pbr_add_rule(&zpr); + else + zebra_pbr_del_rule(&zpr); + } + +stream_failure: + return; +} + +static inline void zread_tc_qdisc(ZAPI_HANDLER_ARGS) +{ + struct zebra_tc_qdisc qdisc; + struct stream *s; + uint32_t total, i; + + s = msg; + STREAM_GETL(s, total); + + for (i = 0; i < total; i++) { + memset(&qdisc, 0, sizeof(qdisc)); + + qdisc.sock = client->sock; + STREAM_GETL(s, qdisc.qdisc.ifindex); + STREAM_GETL(s, qdisc.qdisc.kind); + + if (hdr->command == ZEBRA_TC_QDISC_INSTALL) + zebra_tc_qdisc_install(&qdisc); + else + zebra_tc_qdisc_uninstall(&qdisc); + } + +stream_failure: + return; +} + +static inline void zread_tc_class(ZAPI_HANDLER_ARGS) +{ + struct zebra_tc_class class; + struct stream *s; + uint32_t total, i; + + s = msg; + STREAM_GETL(s, total); + + for (i = 0; i < total; i++) { + memset(&class, 0, sizeof(class)); + + class.sock = client->sock; + STREAM_GETL(s, class.class.ifindex); + STREAM_GETL(s, class.class.handle); + STREAM_GETL(s, class.class.kind); + STREAM_GETQ(s, class.class.u.htb.rate); + STREAM_GETQ(s, class.class.u.htb.ceil); + + if (hdr->command == ZEBRA_TC_CLASS_ADD) + zebra_tc_class_add(&class); + else + zebra_tc_class_delete(&class); + } + +stream_failure: + return; +} + +static inline void zread_tc_filter(ZAPI_HANDLER_ARGS) +{ + struct zebra_tc_filter filter; + struct stream *s; + uint32_t total, i; + + s = msg; + STREAM_GETL(s, total); + + for (i = 0; i < total; i++) { + memset(&filter, 0, sizeof(filter)); + + filter.sock = client->sock; + STREAM_GETL(s, filter.filter.ifindex); + STREAM_GETL(s, filter.filter.handle); + STREAM_GETL(s, filter.filter.priority); + STREAM_GETL(s, filter.filter.protocol); + STREAM_GETL(s, filter.filter.kind); + switch (filter.filter.kind) { + case TC_FILTER_FLOWER: { + STREAM_GETL(s, filter.filter.u.flower.filter_bm); + uint32_t filter_bm = filter.filter.u.flower.filter_bm; + + if (filter_bm & TC_FLOWER_IP_PROTOCOL) + STREAM_GETC(s, filter.filter.u.flower.ip_proto); + if (filter_bm & TC_FLOWER_SRC_IP) { + STREAM_GETC( + s, + filter.filter.u.flower.src_ip.family); + STREAM_GETC(s, filter.filter.u.flower.src_ip + .prefixlen); + STREAM_GET( + &filter.filter.u.flower.src_ip.u.prefix, + s, + prefix_blen(&filter.filter.u.flower + .src_ip)); + + if (!(filter.filter.u.flower.src_ip.family == + AF_INET || + filter.filter.u.flower.src_ip.family == + AF_INET6)) { + zlog_warn( + "Unsupported TC source IP family: %s (%hhu)", + family2str( + filter.filter.u.flower + .src_ip.family), + filter.filter.u.flower.src_ip + .family); + return; + } + } + if (filter_bm & TC_FLOWER_SRC_PORT) { + STREAM_GETW( + s, filter.filter.u.flower.src_port_min); + STREAM_GETW( + s, filter.filter.u.flower.src_port_max); + } + if (filter_bm & TC_FLOWER_DST_IP) { + STREAM_GETC( + s, + filter.filter.u.flower.dst_ip.family); + STREAM_GETC(s, filter.filter.u.flower.dst_ip + .prefixlen); + STREAM_GET( + &filter.filter.u.flower.dst_ip.u.prefix, + s, + prefix_blen(&filter.filter.u.flower + .dst_ip)); + if (!(filter.filter.u.flower.dst_ip.family == + AF_INET || + filter.filter.u.flower.dst_ip.family == + AF_INET6)) { + zlog_warn( + "Unsupported TC destination IP family: %s (%hhu)", + family2str( + filter.filter.u.flower + .dst_ip.family), + filter.filter.u.flower.dst_ip + .family); + return; + } + } + if (filter_bm & TC_FLOWER_DST_PORT) { + STREAM_GETW( + s, filter.filter.u.flower.dst_port_min); + STREAM_GETW( + s, filter.filter.u.flower.dst_port_max); + } + if (filter_bm & TC_FLOWER_DSFIELD) { + STREAM_GETC(s, filter.filter.u.flower.dsfield); + STREAM_GETC( + s, filter.filter.u.flower.dsfield_mask); + } + STREAM_GETL(s, filter.filter.u.flower.classid); + break; + } + case TC_FILTER_BPF: + case TC_FILTER_FLOW: + case TC_FILTER_U32: + case TC_FILTER_UNSPEC: + break; + } + + if (hdr->command == ZEBRA_TC_FILTER_ADD) + zebra_tc_filter_add(&filter); + else + zebra_tc_filter_delete(&filter); + } + +stream_failure: + return; +} + +static inline void zread_ipset(ZAPI_HANDLER_ARGS) +{ + struct zebra_pbr_ipset zpi; + struct stream *s; + uint32_t total, i; + + s = msg; + STREAM_GETL(s, total); + + for (i = 0; i < total; i++) { + memset(&zpi, 0, sizeof(zpi)); + + zpi.sock = client->sock; + zpi.vrf_id = zvrf->vrf->vrf_id; + STREAM_GETL(s, zpi.unique); + STREAM_GETL(s, zpi.type); + STREAM_GETC(s, zpi.family); + STREAM_GET(&zpi.ipset_name, s, ZEBRA_IPSET_NAME_SIZE); + + if (hdr->command == ZEBRA_IPSET_CREATE) + zebra_pbr_create_ipset(&zpi); + else + zebra_pbr_destroy_ipset(&zpi); + } + +stream_failure: + return; +} + +static inline void zread_ipset_entry(ZAPI_HANDLER_ARGS) +{ + struct zebra_pbr_ipset_entry zpi; + struct zebra_pbr_ipset ipset; + struct stream *s; + uint32_t total, i; + + s = msg; + STREAM_GETL(s, total); + + for (i = 0; i < total; i++) { + memset(&zpi, 0, sizeof(zpi)); + memset(&ipset, 0, sizeof(ipset)); + + zpi.sock = client->sock; + STREAM_GETL(s, zpi.unique); + STREAM_GET(&ipset.ipset_name, s, ZEBRA_IPSET_NAME_SIZE); + ipset.ipset_name[ZEBRA_IPSET_NAME_SIZE - 1] = '\0'; + STREAM_GETC(s, zpi.src.family); + STREAM_GETC(s, zpi.src.prefixlen); + STREAM_GET(&zpi.src.u.prefix, s, prefix_blen(&zpi.src)); + STREAM_GETC(s, zpi.dst.family); + STREAM_GETC(s, zpi.dst.prefixlen); + STREAM_GET(&zpi.dst.u.prefix, s, prefix_blen(&zpi.dst)); + + STREAM_GETW(s, zpi.src_port_min); + STREAM_GETW(s, zpi.src_port_max); + STREAM_GETW(s, zpi.dst_port_min); + STREAM_GETW(s, zpi.dst_port_max); + STREAM_GETC(s, zpi.proto); + if (!is_default_prefix(&zpi.src)) + zpi.filter_bm |= PBR_FILTER_SRC_IP; + + if (!is_default_prefix(&zpi.dst)) + zpi.filter_bm |= PBR_FILTER_DST_IP; + if (zpi.dst_port_min != 0 || zpi.proto == IPPROTO_ICMP) + zpi.filter_bm |= PBR_FILTER_DST_PORT; + if (zpi.src_port_min != 0 || zpi.proto == IPPROTO_ICMP) + zpi.filter_bm |= PBR_FILTER_SRC_PORT; + if (zpi.dst_port_max != 0) + zpi.filter_bm |= PBR_FILTER_DST_PORT_RANGE; + if (zpi.src_port_max != 0) + zpi.filter_bm |= PBR_FILTER_SRC_PORT_RANGE; + if (zpi.proto != 0) + zpi.filter_bm |= PBR_FILTER_IP_PROTOCOL; + + if (!(zpi.dst.family == AF_INET + || zpi.dst.family == AF_INET6)) { + zlog_warn( + "Unsupported PBR destination IP family: %s (%hhu)", + family2str(zpi.dst.family), zpi.dst.family); + goto stream_failure; + } + if (!(zpi.src.family == AF_INET + || zpi.src.family == AF_INET6)) { + zlog_warn( + "Unsupported PBR source IP family: %s (%hhu)", + family2str(zpi.src.family), zpi.src.family); + goto stream_failure; + } + + /* calculate backpointer */ + zpi.backpointer = + zebra_pbr_lookup_ipset_pername(ipset.ipset_name); + + if (!zpi.backpointer) { + zlog_warn("ipset name specified: %s does not exist", + ipset.ipset_name); + goto stream_failure; + } + + if (hdr->command == ZEBRA_IPSET_ENTRY_ADD) + zebra_pbr_add_ipset_entry(&zpi); + else + zebra_pbr_del_ipset_entry(&zpi); + } + +stream_failure: + return; +} + + +static inline void zebra_neigh_register(ZAPI_HANDLER_ARGS) +{ + afi_t afi; + + STREAM_GETW(msg, afi); + if (afi <= AFI_UNSPEC || afi >= AFI_MAX) { + zlog_warn( + "Invalid AFI %u while registering for neighbors notifications", + afi); + goto stream_failure; + } + vrf_bitmap_set(&client->nhrp_neighinfo[afi], zvrf_id(zvrf)); +stream_failure: + return; +} + +static inline void zebra_neigh_unregister(ZAPI_HANDLER_ARGS) +{ + afi_t afi; + + STREAM_GETW(msg, afi); + if (afi <= AFI_UNSPEC || afi >= AFI_MAX) { + zlog_warn( + "Invalid AFI %u while unregistering from neighbor notifications", + afi); + goto stream_failure; + } + vrf_bitmap_unset(&client->nhrp_neighinfo[afi], zvrf_id(zvrf)); +stream_failure: + return; +} + +static inline void zebra_gre_get(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + ifindex_t idx; + struct interface *ifp; + struct zebra_if *zebra_if = NULL; + struct zebra_l2info_gre *gre_info; + struct interface *ifp_link = NULL; + vrf_id_t vrf_id_link = VRF_UNKNOWN; + vrf_id_t vrf_id = zvrf->vrf->vrf_id; + + s = msg; + STREAM_GETL(s, idx); + ifp = if_lookup_by_index(idx, vrf_id); + + if (ifp) + zebra_if = ifp->info; + + s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_GRE_UPDATE, vrf_id); + + if (ifp && IS_ZEBRA_IF_GRE(ifp) && zebra_if) { + gre_info = &zebra_if->l2info.gre; + + stream_putl(s, idx); + stream_putl(s, gre_info->ikey); + stream_putl(s, gre_info->ikey); + stream_putl(s, gre_info->ifindex_link); + + ifp_link = if_lookup_by_index_per_ns( + zebra_ns_lookup(gre_info->link_nsid), + gre_info->ifindex_link); + if (ifp_link) + vrf_id_link = ifp_link->vrf->vrf_id; + stream_putl(s, vrf_id_link); + stream_putl(s, gre_info->vtep_ip.s_addr); + stream_putl(s, gre_info->vtep_ip_remote.s_addr); + } else { + stream_putl(s, idx); + stream_putl(s, 0); + stream_putl(s, 0); + stream_putl(s, IFINDEX_INTERNAL); + stream_putl(s, VRF_UNKNOWN); + stream_putl(s, 0); + stream_putl(s, 0); + } + /* Write packet size. */ + stream_putw_at(s, 0, stream_get_endp(s)); + zserv_send_message(client, s); + + return; + stream_failure: + return; +} + +static inline void zebra_configure_arp(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + uint8_t fam; + ifindex_t idx; + struct interface *ifp; + + s = msg; + STREAM_GETC(s, fam); + if (fam != AF_INET && fam != AF_INET6) + return; + STREAM_GETL(s, idx); + ifp = if_lookup_by_index_per_ns(zvrf->zns, idx); + if (!ifp) + return; + dplane_neigh_table_update(ifp, fam, 1, 0, 0); +stream_failure: + return; +} + +static inline void zebra_neigh_ip_add(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_neigh_ip api = {}; + int ret; + const struct interface *ifp; + + s = msg; + ret = zclient_neigh_ip_decode(s, &api); + if (ret < 0) + return; + ifp = if_lookup_by_index(api.index, zvrf_id(zvrf)); + if (!ifp) + return; + dplane_neigh_ip_update(DPLANE_OP_NEIGH_IP_INSTALL, ifp, &api.ip_out, + &api.ip_in, api.ndm_state, client->proto); +} + + +static inline void zebra_neigh_ip_del(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + struct zapi_neigh_ip api = {}; + int ret; + struct interface *ifp; + + s = msg; + ret = zclient_neigh_ip_decode(s, &api); + if (ret < 0) + return; + ifp = if_lookup_by_index(api.index, zvrf_id(zvrf)); + if (!ifp) + return; + dplane_neigh_ip_update(DPLANE_OP_NEIGH_IP_DELETE, ifp, &api.ip_out, + &api.ip_in, api.ndm_state, client->proto); +} + + +static inline void zread_iptable(ZAPI_HANDLER_ARGS) +{ + struct zebra_pbr_iptable *zpi = + XCALLOC(MTYPE_PBR_OBJ, sizeof(struct zebra_pbr_iptable)); + struct stream *s; + + s = msg; + + zpi->interface_name_list = list_new(); + zpi->sock = client->sock; + zpi->vrf_id = zvrf->vrf->vrf_id; + STREAM_GETL(s, zpi->unique); + STREAM_GETL(s, zpi->type); + STREAM_GETL(s, zpi->filter_bm); + STREAM_GETL(s, zpi->action); + STREAM_GETL(s, zpi->fwmark); + STREAM_GET(&zpi->ipset_name, s, ZEBRA_IPSET_NAME_SIZE); + STREAM_GETC(s, zpi->family); + STREAM_GETW(s, zpi->pkt_len_min); + STREAM_GETW(s, zpi->pkt_len_max); + STREAM_GETW(s, zpi->tcp_flags); + STREAM_GETW(s, zpi->tcp_mask_flags); + STREAM_GETC(s, zpi->dscp_value); + STREAM_GETC(s, zpi->fragment); + STREAM_GETC(s, zpi->protocol); + STREAM_GETW(s, zpi->flow_label); + STREAM_GETL(s, zpi->nb_interface); + zebra_pbr_iptable_update_interfacelist(s, zpi); + + if (hdr->command == ZEBRA_IPTABLE_ADD) + zebra_pbr_add_iptable(zpi); + else + zebra_pbr_del_iptable(zpi); + +stream_failure: + zebra_pbr_iptable_free(zpi); + zpi = NULL; + return; +} + +static inline void zread_neigh_discover(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + ifindex_t ifindex; + struct interface *ifp; + struct prefix p; + struct ipaddr ip; + + s = msg; + + STREAM_GETL(s, ifindex); + + ifp = if_lookup_by_index_per_ns(zvrf->zns, ifindex); + if (!ifp) { + zlog_debug("Failed to lookup ifindex: %u", ifindex); + return; + } + + STREAM_GETC(s, p.family); + STREAM_GETC(s, p.prefixlen); + STREAM_GET(&p.u.prefix, s, prefix_blen(&p)); + + if (p.family == AF_INET) + SET_IPADDR_V4(&ip); + else + SET_IPADDR_V6(&ip); + + memcpy(&ip.ip.addr, &p.u.prefix, prefix_blen(&p)); + + dplane_neigh_discover(ifp, &ip); + +stream_failure: + return; +} + +static inline void zebra_gre_source_set(ZAPI_HANDLER_ARGS) +{ + struct stream *s; + ifindex_t idx, link_idx; + vrf_id_t link_vrf_id; + struct interface *ifp; + struct interface *ifp_link; + vrf_id_t vrf_id = zvrf->vrf->vrf_id; + struct zebra_if *zif, *gre_zif; + struct zebra_l2info_gre *gre_info; + unsigned int mtu; + + s = msg; + STREAM_GETL(s, idx); + ifp = if_lookup_by_index(idx, vrf_id); + STREAM_GETL(s, link_idx); + STREAM_GETL(s, link_vrf_id); + STREAM_GETL(s, mtu); + + ifp_link = if_lookup_by_index(link_idx, link_vrf_id); + if (!ifp_link || !ifp) { + zlog_warn("GRE (index %u, VRF %u) or GRE link interface (index %u, VRF %u) not found, when setting GRE params", + idx, vrf_id, link_idx, link_vrf_id); + return; + } + + if (!IS_ZEBRA_IF_GRE(ifp)) + return; + + gre_zif = (struct zebra_if *)ifp->info; + zif = (struct zebra_if *)ifp_link->info; + if (!zif || !gre_zif) + return; + + gre_info = &zif->l2info.gre; + if (!gre_info) + return; + + if (!mtu) + mtu = ifp->mtu; + + /* if gre link already set or mtu did not change, do not set it */ + if (gre_zif->link && gre_zif->link == ifp_link && mtu == ifp->mtu) + return; + + dplane_gre_set(ifp, ifp_link, mtu, gre_info); + + stream_failure: + return; +} + +static void zsend_error_msg(struct zserv *client, enum zebra_error_types error, + struct zmsghdr *bad_hdr) +{ + + struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ); + + zclient_create_header(s, ZEBRA_ERROR, bad_hdr->vrf_id); + + zserv_encode_error(s, error); + + client->error_cnt++; + zserv_send_message(client, s); +} + +static void zserv_error_no_vrf(ZAPI_HANDLER_ARGS) +{ + if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV) + zlog_debug("ZAPI message specifies unknown VRF: %d", + hdr->vrf_id); + + zsend_error_msg(client, ZEBRA_NO_VRF, hdr); +} + +static void zserv_error_invalid_msg_type(ZAPI_HANDLER_ARGS) +{ + zlog_info("Zebra received unknown command %d", hdr->command); + + zsend_error_msg(client, ZEBRA_INVALID_MSG_TYPE, hdr); +} + +void (*const zserv_handlers[])(ZAPI_HANDLER_ARGS) = { + [ZEBRA_ROUTER_ID_ADD] = zread_router_id_add, + [ZEBRA_ROUTER_ID_DELETE] = zread_router_id_delete, + [ZEBRA_INTERFACE_ADD] = zread_interface_add, + [ZEBRA_INTERFACE_DELETE] = zread_interface_delete, + [ZEBRA_INTERFACE_SET_PROTODOWN] = zread_interface_set_protodown, + [ZEBRA_ROUTE_ADD] = zread_route_add, + [ZEBRA_ROUTE_DELETE] = zread_route_del, + [ZEBRA_REDISTRIBUTE_ADD] = zebra_redistribute_add, + [ZEBRA_REDISTRIBUTE_DELETE] = zebra_redistribute_delete, + [ZEBRA_REDISTRIBUTE_DEFAULT_ADD] = zebra_redistribute_default_add, + [ZEBRA_REDISTRIBUTE_DEFAULT_DELETE] = zebra_redistribute_default_delete, + [ZEBRA_NEXTHOP_LOOKUP_MRIB] = zread_nexthop_lookup_mrib, + [ZEBRA_HELLO] = zread_hello, + [ZEBRA_NEXTHOP_REGISTER] = zread_rnh_register, + [ZEBRA_NEXTHOP_UNREGISTER] = zread_rnh_unregister, + [ZEBRA_BFD_DEST_UPDATE] = zebra_ptm_bfd_dst_register, + [ZEBRA_BFD_DEST_REGISTER] = zebra_ptm_bfd_dst_register, + [ZEBRA_BFD_DEST_DEREGISTER] = zebra_ptm_bfd_dst_deregister, +#if HAVE_BFDD > 0 + [ZEBRA_BFD_DEST_REPLAY] = zebra_ptm_bfd_dst_replay, +#endif /* HAVE_BFDD */ + [ZEBRA_VRF_UNREGISTER] = zread_vrf_unregister, + [ZEBRA_VRF_LABEL] = zread_vrf_label, + [ZEBRA_BFD_CLIENT_REGISTER] = zebra_ptm_bfd_client_register, + [ZEBRA_INTERFACE_ENABLE_RADV] = zebra_interface_radv_enable, + [ZEBRA_INTERFACE_DISABLE_RADV] = zebra_interface_radv_disable, + [ZEBRA_SR_POLICY_SET] = zread_sr_policy_set, + [ZEBRA_SR_POLICY_DELETE] = zread_sr_policy_delete, + [ZEBRA_MPLS_LABELS_ADD] = zread_mpls_labels_add, + [ZEBRA_MPLS_LABELS_DELETE] = zread_mpls_labels_delete, + [ZEBRA_MPLS_LABELS_REPLACE] = zread_mpls_labels_replace, + [ZEBRA_IPMR_ROUTE_STATS] = zebra_ipmr_route_stats, + [ZEBRA_LABEL_MANAGER_CONNECT] = zread_label_manager_request, + [ZEBRA_LABEL_MANAGER_CONNECT_ASYNC] = zread_label_manager_request, + [ZEBRA_GET_LABEL_CHUNK] = zread_label_manager_request, + [ZEBRA_RELEASE_LABEL_CHUNK] = zread_label_manager_request, + [ZEBRA_FEC_REGISTER] = zread_fec_register, + [ZEBRA_FEC_UNREGISTER] = zread_fec_unregister, + [ZEBRA_ADVERTISE_DEFAULT_GW] = zebra_vxlan_advertise_gw_macip, + [ZEBRA_ADVERTISE_SVI_MACIP] = zebra_vxlan_advertise_svi_macip, + [ZEBRA_ADVERTISE_SUBNET] = zebra_vxlan_advertise_subnet, + [ZEBRA_ADVERTISE_ALL_VNI] = zebra_vxlan_advertise_all_vni, + [ZEBRA_REMOTE_ES_VTEP_ADD] = zebra_evpn_proc_remote_es, + [ZEBRA_REMOTE_ES_VTEP_DEL] = zebra_evpn_proc_remote_es, + [ZEBRA_REMOTE_VTEP_ADD] = zebra_vxlan_remote_vtep_add_zapi, + [ZEBRA_REMOTE_VTEP_DEL] = zebra_vxlan_remote_vtep_del_zapi, + [ZEBRA_REMOTE_MACIP_ADD] = zebra_vxlan_remote_macip_add, + [ZEBRA_REMOTE_MACIP_DEL] = zebra_vxlan_remote_macip_del, + [ZEBRA_DUPLICATE_ADDR_DETECTION] = zebra_vxlan_dup_addr_detection, + [ZEBRA_INTERFACE_SET_MASTER] = zread_interface_set_master, + [ZEBRA_PW_ADD] = zread_pseudowire, + [ZEBRA_PW_DELETE] = zread_pseudowire, + [ZEBRA_PW_SET] = zread_pseudowire, + [ZEBRA_PW_UNSET] = zread_pseudowire, + [ZEBRA_RULE_ADD] = zread_rule, + [ZEBRA_RULE_DELETE] = zread_rule, + [ZEBRA_TABLE_MANAGER_CONNECT] = zread_table_manager_request, + [ZEBRA_GET_TABLE_CHUNK] = zread_table_manager_request, + [ZEBRA_RELEASE_TABLE_CHUNK] = zread_table_manager_request, + [ZEBRA_IPSET_CREATE] = zread_ipset, + [ZEBRA_IPSET_DESTROY] = zread_ipset, + [ZEBRA_IPSET_ENTRY_ADD] = zread_ipset_entry, + [ZEBRA_IPSET_ENTRY_DELETE] = zread_ipset_entry, + [ZEBRA_IPTABLE_ADD] = zread_iptable, + [ZEBRA_IPTABLE_DELETE] = zread_iptable, + [ZEBRA_VXLAN_FLOOD_CONTROL] = zebra_vxlan_flood_control, + [ZEBRA_VXLAN_SG_REPLAY] = zebra_vxlan_sg_replay, + [ZEBRA_MLAG_CLIENT_REGISTER] = zebra_mlag_client_register, + [ZEBRA_MLAG_CLIENT_UNREGISTER] = zebra_mlag_client_unregister, + [ZEBRA_MLAG_FORWARD_MSG] = zebra_mlag_forward_client_msg, + [ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK] = zread_srv6_manager_request, + [ZEBRA_SRV6_MANAGER_RELEASE_LOCATOR_CHUNK] = zread_srv6_manager_request, + [ZEBRA_CLIENT_CAPABILITIES] = zread_client_capabilities, + [ZEBRA_NEIGH_DISCOVER] = zread_neigh_discover, + [ZEBRA_NHG_ADD] = zread_nhg_add, + [ZEBRA_NHG_DEL] = zread_nhg_del, + [ZEBRA_ROUTE_NOTIFY_REQUEST] = zread_route_notify_request, + [ZEBRA_EVPN_REMOTE_NH_ADD] = zebra_evpn_proc_remote_nh, + [ZEBRA_EVPN_REMOTE_NH_DEL] = zebra_evpn_proc_remote_nh, + [ZEBRA_NEIGH_IP_ADD] = zebra_neigh_ip_add, + [ZEBRA_NEIGH_IP_DEL] = zebra_neigh_ip_del, + [ZEBRA_NHRP_NEIGH_REGISTER] = zebra_neigh_register, + [ZEBRA_NHRP_NEIGH_UNREGISTER] = zebra_neigh_unregister, + [ZEBRA_CONFIGURE_ARP] = zebra_configure_arp, + [ZEBRA_GRE_GET] = zebra_gre_get, + [ZEBRA_GRE_SOURCE_SET] = zebra_gre_source_set, + [ZEBRA_TC_QDISC_INSTALL] = zread_tc_qdisc, + [ZEBRA_TC_QDISC_UNINSTALL] = zread_tc_qdisc, + [ZEBRA_TC_CLASS_ADD] = zread_tc_class, + [ZEBRA_TC_CLASS_DELETE] = zread_tc_class, + [ZEBRA_TC_FILTER_ADD] = zread_tc_filter, + [ZEBRA_TC_FILTER_DELETE] = zread_tc_filter, +}; + +/* + * Process a batch of zapi messages. + */ +void zserv_handle_commands(struct zserv *client, struct stream_fifo *fifo) +{ + struct zmsghdr hdr; + struct zebra_vrf *zvrf; + struct stream *msg; + struct stream_fifo temp_fifo; + + stream_fifo_init(&temp_fifo); + + while (stream_fifo_head(fifo)) { + msg = stream_fifo_pop(fifo); + + if (STREAM_READABLE(msg) > ZEBRA_MAX_PACKET_SIZ) { + if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV) + zlog_debug( + "ZAPI message is %zu bytes long but the maximum packet size is %u; dropping", + STREAM_READABLE(msg), + ZEBRA_MAX_PACKET_SIZ); + goto continue_loop; + } + + zapi_parse_header(msg, &hdr); + + if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV + && IS_ZEBRA_DEBUG_DETAIL) + zserv_log_message(NULL, msg, &hdr); + + hdr.length -= ZEBRA_HEADER_SIZE; + + /* Before checking for a handler function, check for + * special messages that are handled the 'opaque zapi' module. + */ + if (zebra_opaque_handles_msgid(hdr.command)) { + /* Reset message buffer */ + stream_set_getp(msg, 0); + + stream_fifo_push(&temp_fifo, msg); + + /* Continue without freeing the message */ + msg = NULL; + goto continue_loop; + } + + /* lookup vrf */ + zvrf = zebra_vrf_lookup_by_id(hdr.vrf_id); + if (!zvrf) { + zserv_error_no_vrf(client, &hdr, msg, zvrf); + goto continue_loop; + } + + if (hdr.command >= array_size(zserv_handlers) + || zserv_handlers[hdr.command] == NULL) { + zserv_error_invalid_msg_type(client, &hdr, msg, zvrf); + goto continue_loop; + } + + zserv_handlers[hdr.command](client, &hdr, msg, zvrf); + +continue_loop: + stream_free(msg); + } + + /* Dispatch any special messages from the temp fifo */ + if (stream_fifo_head(&temp_fifo) != NULL) + zebra_opaque_enqueue_batch(&temp_fifo); + + stream_fifo_deinit(&temp_fifo); +} |