diff options
Diffstat (limited to 'sharpd/sharp_zebra.c')
| -rw-r--r-- | sharpd/sharp_zebra.c | 1011 |
1 files changed, 1011 insertions, 0 deletions
diff --git a/sharpd/sharp_zebra.c b/sharpd/sharp_zebra.c new file mode 100644 index 0000000..b40c2c6 --- /dev/null +++ b/sharpd/sharp_zebra.c @@ -0,0 +1,1011 @@ +/* + * Zebra connect code. + * Copyright (C) Cumulus Networks, Inc. + * Donald Sharp + * + * This file is part of FRR. + * + * FRR is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * FRR is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; see the file COPYING; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include <zebra.h> + +#include "thread.h" +#include "command.h" +#include "network.h" +#include "prefix.h" +#include "stream.h" +#include "memory.h" +#include "zclient.h" +#include "nexthop.h" +#include "nexthop_group.h" +#include "link_state.h" + +#include "sharp_globals.h" +#include "sharp_nht.h" +#include "sharp_zebra.h" + +/* Zebra structure to hold current status. */ +struct zclient *zclient = NULL; + +/* For registering threads. */ +extern struct thread_master *master; + +/* Privs info */ +extern struct zebra_privs_t sharp_privs; + +DEFINE_MTYPE_STATIC(SHARPD, ZC, "Test zclients"); + +/* Struct to hold list of test zclients */ +struct sharp_zclient { + struct sharp_zclient *prev; + struct sharp_zclient *next; + struct zclient *client; +}; + +/* Head of test zclient list */ +static struct sharp_zclient *sharp_clients_head; + +static int sharp_opaque_handler(ZAPI_CALLBACK_ARGS); + +/* Utility to add a test zclient struct to the list */ +static void add_zclient(struct zclient *client) +{ + struct sharp_zclient *node; + + node = XCALLOC(MTYPE_ZC, sizeof(struct sharp_zclient)); + + node->client = client; + + node->next = sharp_clients_head; + if (sharp_clients_head) + sharp_clients_head->prev = node; + sharp_clients_head = node; +} + +/* Interface addition message from zebra. */ +static int sharp_ifp_create(struct interface *ifp) +{ + return 0; +} + +static int sharp_ifp_destroy(struct interface *ifp) +{ + return 0; +} + +static int interface_address_add(ZAPI_CALLBACK_ARGS) +{ + zebra_interface_address_read(cmd, zclient->ibuf, vrf_id); + + return 0; +} + +static int interface_address_delete(ZAPI_CALLBACK_ARGS) +{ + struct connected *c; + + c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id); + + if (!c) + return 0; + + connected_free(&c); + return 0; +} + +static int sharp_ifp_up(struct interface *ifp) +{ + return 0; +} + +static int sharp_ifp_down(struct interface *ifp) +{ + return 0; +} + +int sharp_install_lsps_helper(bool install_p, bool update_p, + const struct prefix *p, uint8_t type, + int instance, uint32_t in_label, + const struct nexthop_group *nhg, + const struct nexthop_group *backup_nhg) +{ + struct zapi_labels zl = {}; + struct zapi_nexthop *znh; + const struct nexthop *nh; + int i, cmd, ret; + + zl.type = ZEBRA_LSP_SHARP; + zl.local_label = in_label; + + if (p) { + SET_FLAG(zl.message, ZAPI_LABELS_FTN); + prefix_copy(&zl.route.prefix, p); + zl.route.type = type; + zl.route.instance = instance; + } + + /* List of nexthops is optional for delete */ + i = 0; + if (nhg) { + for (ALL_NEXTHOPS_PTR(nhg, nh)) { + znh = &zl.nexthops[i]; + + /* Must have labels to be useful */ + if (nh->nh_label == NULL || + nh->nh_label->num_labels == 0) + continue; + + if (nh->type == NEXTHOP_TYPE_IFINDEX || + nh->type == NEXTHOP_TYPE_BLACKHOLE) + /* Hmm - can't really deal with these types */ + continue; + + ret = zapi_nexthop_from_nexthop(znh, nh); + if (ret < 0) + return -1; + + i++; + if (i >= MULTIPATH_NUM) + break; + } + } + + /* Whoops - no nexthops isn't very useful for install */ + if (i == 0 && install_p) + return -1; + + zl.nexthop_num = i; + + /* Add optional backup nexthop info. Since these are used by index, + * we can't just skip over an invalid backup nexthop: we will + * invalidate the entire operation. + */ + if (backup_nhg != NULL) { + i = 0; + for (ALL_NEXTHOPS_PTR(backup_nhg, nh)) { + znh = &zl.backup_nexthops[i]; + + /* Must have labels to be useful */ + if (nh->nh_label == NULL || + nh->nh_label->num_labels == 0) + return -1; + + if (nh->type == NEXTHOP_TYPE_IFINDEX || + nh->type == NEXTHOP_TYPE_BLACKHOLE) + /* Hmm - can't really deal with these types */ + return -1; + + ret = zapi_nexthop_from_nexthop(znh, nh); + if (ret < 0) + return -1; + + i++; + if (i >= MULTIPATH_NUM) + break; + } + + if (i > 0) + SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS); + + zl.backup_nexthop_num = i; + } + + + if (install_p) { + if (update_p) + cmd = ZEBRA_MPLS_LABELS_REPLACE; + else + cmd = ZEBRA_MPLS_LABELS_ADD; + } else { + cmd = ZEBRA_MPLS_LABELS_DELETE; + } + + if (zebra_send_mpls_labels(zclient, cmd, &zl) == ZCLIENT_SEND_FAILURE) + return -1; + + return 0; +} + +enum where_to_restart { + SHARP_INSTALL_ROUTES_RESTART, + SHARP_DELETE_ROUTES_RESTART, +}; + +struct buffer_delay { + struct prefix p; + uint32_t count; + uint32_t routes; + vrf_id_t vrf_id; + uint8_t instance; + uint32_t nhgid; + uint32_t flags; + const struct nexthop_group *nhg; + const struct nexthop_group *backup_nhg; + enum where_to_restart restart; + char *opaque; +} wb; + +/* + * route_add - Encodes a route to zebra + * + * This function returns true when the route was buffered + * by the underlying stream system + */ +static bool route_add(const struct prefix *p, vrf_id_t vrf_id, uint8_t instance, + uint32_t nhgid, const struct nexthop_group *nhg, + const struct nexthop_group *backup_nhg, uint32_t flags, + char *opaque) +{ + struct zapi_route api; + struct zapi_nexthop *api_nh; + struct nexthop *nh; + int i = 0; + + memset(&api, 0, sizeof(api)); + api.vrf_id = vrf_id; + api.type = ZEBRA_ROUTE_SHARP; + api.instance = instance; + api.safi = SAFI_UNICAST; + memcpy(&api.prefix, p, sizeof(*p)); + + api.flags = flags; + SET_FLAG(api.flags, ZEBRA_FLAG_ALLOW_RECURSION); + SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); + + /* Only send via ID if nhgroup has been successfully installed */ + if (nhgid && sharp_nhgroup_id_is_installed(nhgid)) { + SET_FLAG(api.message, ZAPI_MESSAGE_NHG); + api.nhgid = nhgid; + } else { + for (ALL_NEXTHOPS_PTR(nhg, nh)) { + api_nh = &api.nexthops[i]; + + zapi_nexthop_from_nexthop(api_nh, nh); + + i++; + } + api.nexthop_num = i; + } + + /* Include backup nexthops, if present */ + if (backup_nhg && backup_nhg->nexthop) { + SET_FLAG(api.message, ZAPI_MESSAGE_BACKUP_NEXTHOPS); + + i = 0; + for (ALL_NEXTHOPS_PTR(backup_nhg, nh)) { + api_nh = &api.backup_nexthops[i]; + + zapi_backup_nexthop_from_nexthop(api_nh, nh); + + i++; + } + + api.backup_nexthop_num = i; + } + + if (strlen(opaque)) { + SET_FLAG(api.message, ZAPI_MESSAGE_OPAQUE); + api.opaque.length = strlen(opaque) + 1; + assert(api.opaque.length <= ZAPI_MESSAGE_OPAQUE_LENGTH); + memcpy(api.opaque.data, opaque, api.opaque.length); + } + + if (zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api) + == ZCLIENT_SEND_BUFFERED) + return true; + else + return false; +} + +/* + * route_delete - Encodes a route for deletion to zebra + * + * This function returns true when the route sent was + * buffered by the underlying stream system. + */ +static bool route_delete(struct prefix *p, vrf_id_t vrf_id, uint8_t instance) +{ + struct zapi_route api; + + memset(&api, 0, sizeof(api)); + api.vrf_id = vrf_id; + api.type = ZEBRA_ROUTE_SHARP; + api.safi = SAFI_UNICAST; + api.instance = instance; + memcpy(&api.prefix, p, sizeof(*p)); + + if (zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api) + == ZCLIENT_SEND_BUFFERED) + return true; + else + return false; +} + +static void sharp_install_routes_restart(struct prefix *p, uint32_t count, + vrf_id_t vrf_id, uint8_t instance, + uint32_t nhgid, + const struct nexthop_group *nhg, + const struct nexthop_group *backup_nhg, + uint32_t routes, uint32_t flags, + char *opaque) +{ + uint32_t temp, i; + bool v4 = false; + + if (p->family == AF_INET) { + v4 = true; + temp = ntohl(p->u.prefix4.s_addr); + } else + temp = ntohl(p->u.val32[3]); + + for (i = count; i < routes; i++) { + bool buffered = route_add(p, vrf_id, (uint8_t)instance, nhgid, + nhg, backup_nhg, flags, opaque); + if (v4) + p->u.prefix4.s_addr = htonl(++temp); + else + p->u.val32[3] = htonl(++temp); + + if (buffered) { + wb.p = *p; + wb.count = i+1; + wb.routes = routes; + wb.vrf_id = vrf_id; + wb.instance = instance; + wb.nhgid = nhgid; + wb.nhg = nhg; + wb.flags = flags; + wb.backup_nhg = backup_nhg; + wb.opaque = opaque; + wb.restart = SHARP_INSTALL_ROUTES_RESTART; + + return; + } + } +} + +void sharp_install_routes_helper(struct prefix *p, vrf_id_t vrf_id, + uint8_t instance, uint32_t nhgid, + const struct nexthop_group *nhg, + const struct nexthop_group *backup_nhg, + uint32_t routes, uint32_t flags, char *opaque) +{ + zlog_debug("Inserting %u routes", routes); + + /* Only use backup route/nexthops if present */ + if (backup_nhg && (backup_nhg->nexthop == NULL)) + backup_nhg = NULL; + + monotime(&sg.r.t_start); + sharp_install_routes_restart(p, 0, vrf_id, instance, nhgid, nhg, + backup_nhg, routes, flags, opaque); +} + +static void sharp_remove_routes_restart(struct prefix *p, uint32_t count, + vrf_id_t vrf_id, uint8_t instance, + uint32_t routes) +{ + uint32_t temp, i; + bool v4 = false; + + if (p->family == AF_INET) { + v4 = true; + temp = ntohl(p->u.prefix4.s_addr); + } else + temp = ntohl(p->u.val32[3]); + + for (i = count; i < routes; i++) { + bool buffered = route_delete(p, vrf_id, (uint8_t)instance); + + if (v4) + p->u.prefix4.s_addr = htonl(++temp); + else + p->u.val32[3] = htonl(++temp); + + if (buffered) { + wb.p = *p; + wb.count = i + 1; + wb.vrf_id = vrf_id; + wb.instance = instance; + wb.routes = routes; + wb.restart = SHARP_DELETE_ROUTES_RESTART; + + return; + } + } +} + +void sharp_remove_routes_helper(struct prefix *p, vrf_id_t vrf_id, + uint8_t instance, uint32_t routes) +{ + zlog_debug("Removing %u routes", routes); + + monotime(&sg.r.t_start); + + sharp_remove_routes_restart(p, 0, vrf_id, instance, routes); +} + +static void handle_repeated(bool installed) +{ + struct prefix p = sg.r.orig_prefix; + sg.r.repeat--; + + if (sg.r.repeat <= 0) + return; + + if (installed) { + sg.r.removed_routes = 0; + sharp_remove_routes_helper(&p, sg.r.vrf_id, + sg.r.inst, sg.r.total_routes); + } + + if (!installed) { + sg.r.installed_routes = 0; + sharp_install_routes_helper(&p, sg.r.vrf_id, sg.r.inst, + sg.r.nhgid, &sg.r.nhop_group, + &sg.r.backup_nhop_group, + sg.r.total_routes, sg.r.flags, + sg.r.opaque); + } +} + +static void sharp_zclient_buffer_ready(void) +{ + switch (wb.restart) { + case SHARP_INSTALL_ROUTES_RESTART: + sharp_install_routes_restart( + &wb.p, wb.count, wb.vrf_id, wb.instance, wb.nhgid, + wb.nhg, wb.backup_nhg, wb.routes, wb.flags, + wb.opaque); + return; + case SHARP_DELETE_ROUTES_RESTART: + sharp_remove_routes_restart(&wb.p, wb.count, wb.vrf_id, + wb.instance, wb.routes); + return; + } +} + +static int route_notify_owner(ZAPI_CALLBACK_ARGS) +{ + struct timeval r; + struct prefix p; + enum zapi_route_notify_owner note; + uint32_t table; + + if (!zapi_route_notify_decode(zclient->ibuf, &p, &table, ¬e, + NULL, NULL)) + return -1; + + switch (note) { + case ZAPI_ROUTE_INSTALLED: + sg.r.installed_routes++; + if (sg.r.total_routes == sg.r.installed_routes) { + monotime(&sg.r.t_end); + timersub(&sg.r.t_end, &sg.r.t_start, &r); + zlog_debug("Installed All Items %jd.%ld", + (intmax_t)r.tv_sec, (long)r.tv_usec); + handle_repeated(true); + } + break; + case ZAPI_ROUTE_FAIL_INSTALL: + zlog_debug("Failed install of route"); + break; + case ZAPI_ROUTE_BETTER_ADMIN_WON: + zlog_debug("Better Admin Distance won over us"); + break; + case ZAPI_ROUTE_REMOVED: + sg.r.removed_routes++; + if (sg.r.total_routes == sg.r.removed_routes) { + monotime(&sg.r.t_end); + timersub(&sg.r.t_end, &sg.r.t_start, &r); + zlog_debug("Removed all Items %jd.%ld", + (intmax_t)r.tv_sec, (long)r.tv_usec); + handle_repeated(false); + } + break; + case ZAPI_ROUTE_REMOVE_FAIL: + zlog_debug("Route removal Failure"); + break; + } + return 0; +} + +static void zebra_connected(struct zclient *zclient) +{ + zclient_send_reg_requests(zclient, VRF_DEFAULT); + + /* + * Do not actually turn this on yet + * This is just the start of the infrastructure needed here + * This can be fixed at a later time. + * + * zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, + * ZEBRA_ROUTE_ALL, 0, VRF_DEFAULT); + */ +} + +void vrf_label_add(vrf_id_t vrf_id, afi_t afi, mpls_label_t label) +{ + zclient_send_vrf_label(zclient, vrf_id, afi, label, ZEBRA_LSP_SHARP); +} + +void nhg_add(uint32_t id, const struct nexthop_group *nhg, + const struct nexthop_group *backup_nhg) +{ + struct zapi_nhg api_nhg = {}; + struct zapi_nexthop *api_nh; + struct nexthop *nh; + bool is_valid = true; + + api_nhg.id = id; + for (ALL_NEXTHOPS_PTR(nhg, nh)) { + if (api_nhg.nexthop_num >= MULTIPATH_NUM) { + zlog_warn( + "%s: number of nexthops greater than max multipath size, truncating", + __func__); + break; + } + + /* Unresolved nexthops will lead to failure - only send + * nexthops that zebra will consider valid. + */ + if (nh->ifindex == 0) + continue; + + api_nh = &api_nhg.nexthops[api_nhg.nexthop_num]; + + zapi_nexthop_from_nexthop(api_nh, nh); + api_nhg.nexthop_num++; + } + + if (api_nhg.nexthop_num == 0) { + zlog_debug("%s: nhg %u not sent: no valid nexthops", + __func__, id); + is_valid = false; + goto done; + } + + if (backup_nhg) { + for (ALL_NEXTHOPS_PTR(backup_nhg, nh)) { + if (api_nhg.backup_nexthop_num >= MULTIPATH_NUM) { + zlog_warn( + "%s: number of backup nexthops greater than max multipath size, truncating", + __func__); + break; + } + + /* Unresolved nexthop: will be rejected by zebra. + * That causes a problem, since the primary nexthops + * rely on array indexing into the backup nexthops. If + * that array isn't valid, the backup indexes won't be + * valid. + */ + if (nh->ifindex == 0) { + zlog_debug("%s: nhg %u: invalid backup nexthop", + __func__, id); + is_valid = false; + break; + } + + api_nh = &api_nhg.backup_nexthops + [api_nhg.backup_nexthop_num]; + + zapi_backup_nexthop_from_nexthop(api_nh, nh); + api_nhg.backup_nexthop_num++; + } + } + +done: + if (is_valid) + zclient_nhg_send(zclient, ZEBRA_NHG_ADD, &api_nhg); +} + +void nhg_del(uint32_t id) +{ + struct zapi_nhg api_nhg = {}; + + api_nhg.id = id; + + zclient_nhg_send(zclient, ZEBRA_NHG_DEL, &api_nhg); +} + +void sharp_zebra_nexthop_watch(struct prefix *p, vrf_id_t vrf_id, bool import, + bool watch, bool connected) +{ + int command; + + command = ZEBRA_NEXTHOP_REGISTER; + + if (!watch) + command = ZEBRA_NEXTHOP_UNREGISTER; + + if (zclient_send_rnh(zclient, command, p, SAFI_UNICAST, connected, + false, vrf_id) + == ZCLIENT_SEND_FAILURE) + zlog_warn("%s: Failure to send nexthop to zebra", __func__); +} + +static int sharp_debug_nexthops(struct zapi_route *api) +{ + int i; + + if (api->nexthop_num == 0) { + zlog_debug( + " Not installed"); + return 0; + } + + for (i = 0; i < api->nexthop_num; i++) { + struct zapi_nexthop *znh = &api->nexthops[i]; + + switch (znh->type) { + case NEXTHOP_TYPE_IPV4_IFINDEX: + case NEXTHOP_TYPE_IPV4: + zlog_debug( + " Nexthop %pI4, type: %d, ifindex: %d, vrf: %d, label_num: %d", + &znh->gate.ipv4.s_addr, znh->type, znh->ifindex, + znh->vrf_id, znh->label_num); + break; + case NEXTHOP_TYPE_IPV6_IFINDEX: + case NEXTHOP_TYPE_IPV6: + zlog_debug( + " Nexthop %pI6, type: %d, ifindex: %d, vrf: %d, label_num: %d", + &znh->gate.ipv6, znh->type, znh->ifindex, + znh->vrf_id, znh->label_num); + break; + case NEXTHOP_TYPE_IFINDEX: + zlog_debug(" Nexthop IFINDEX: %d, ifindex: %d", + znh->type, znh->ifindex); + break; + case NEXTHOP_TYPE_BLACKHOLE: + zlog_debug(" Nexthop blackhole"); + break; + } + } + + return i; +} +static int sharp_nexthop_update(ZAPI_CALLBACK_ARGS) +{ + struct sharp_nh_tracker *nht; + struct zapi_route nhr; + struct prefix matched; + + if (!zapi_nexthop_update_decode(zclient->ibuf, &matched, &nhr)) { + zlog_err("%s: Decode of update failed", __func__); + return 0; + } + + zlog_debug("Received update for %pFX actual match: %pFX metric: %u", + &matched, &nhr.prefix, nhr.metric); + + nht = sharp_nh_tracker_get(&matched); + nht->nhop_num = nhr.nexthop_num; + nht->updates++; + + sharp_debug_nexthops(&nhr); + + return 0; +} + +static int sharp_redistribute_route(ZAPI_CALLBACK_ARGS) +{ + struct zapi_route api; + + if (zapi_route_decode(zclient->ibuf, &api) < 0) + zlog_warn("%s: Decode of redistribute failed: %d", __func__, + ZEBRA_REDISTRIBUTE_ROUTE_ADD); + + zlog_debug("%s: %pFX (%s)", zserv_command_string(cmd), + &api.prefix, zebra_route_string(api.type)); + + sharp_debug_nexthops(&api); + + return 0; +} + +void sharp_redistribute_vrf(struct vrf *vrf, int type) +{ + zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type, + 0, vrf->vrf_id); +} + +static zclient_handler *const sharp_opaque_handlers[] = { + [ZEBRA_OPAQUE_MESSAGE] = sharp_opaque_handler, +}; + +/* Add a zclient with a specified session id, for testing. */ +int sharp_zclient_create(uint32_t session_id) +{ + struct zclient *client; + struct sharp_zclient *node; + + /* Check for duplicates */ + for (node = sharp_clients_head; node != NULL; node = node->next) { + if (node->client->session_id == session_id) + return -1; + } + + client = zclient_new(master, &zclient_options_default, + sharp_opaque_handlers, + array_size(sharp_opaque_handlers)); + client->sock = -1; + client->session_id = session_id; + + zclient_init(client, ZEBRA_ROUTE_SHARP, 0, &sharp_privs); + + /* Enqueue on the list of test clients */ + add_zclient(client); + + return 0; +} + +/* Delete one of the extra test zclients */ +int sharp_zclient_delete(uint32_t session_id) +{ + struct sharp_zclient *node; + + /* Search for session */ + for (node = sharp_clients_head; node != NULL; node = node->next) { + if (node->client->session_id == session_id) { + /* Dequeue from list */ + if (node->next) + node->next->prev = node->prev; + if (node->prev) + node->prev->next = node->next; + if (node == sharp_clients_head) + sharp_clients_head = node->next; + + /* Clean up zclient */ + zclient_stop(node->client); + zclient_free(node->client); + + /* Free memory */ + XFREE(MTYPE_ZC, node); + break; + } + } + + return 0; +} + +static const char *const type2txt[] = { "Generic", "Vertex", "Edge", "Subnet" }; +static const char *const status2txt[] = { "Unknown", "New", "Update", + "Delete", "Sync", "Orphan"}; +/* Handler for opaque messages */ +static int sharp_opaque_handler(ZAPI_CALLBACK_ARGS) +{ + struct stream *s; + struct zapi_opaque_msg info; + struct ls_element *lse; + + s = zclient->ibuf; + + if (zclient_opaque_decode(s, &info) != 0) + return -1; + + zlog_debug("%s: [%u] received opaque type %u", __func__, + zclient->session_id, info.type); + + if (info.type == LINK_STATE_UPDATE) { + lse = ls_stream2ted(sg.ted, s, false); + if (lse) { + zlog_debug(" |- Got %s %s from Link State Database", + status2txt[lse->status], + type2txt[lse->type]); + lse->status = SYNC; + } + else + zlog_debug( + "%s: Error to convert Stream into Link State", + __func__); + } + + return 0; +} + +/* + * Send OPAQUE messages, using subtype 'type'. + */ +void sharp_opaque_send(uint32_t type, uint32_t proto, uint32_t instance, + uint32_t session_id, uint32_t count) +{ + uint8_t buf[32]; + int ret; + uint32_t i; + + /* Prepare a small payload */ + for (i = 0; i < sizeof(buf); i++) { + if (type < 255) + buf[i] = type; + else + buf[i] = 255; + } + + /* Send some messages - broadcast and unicast are supported */ + for (i = 0; i < count; i++) { + if (proto == 0) + ret = zclient_send_opaque(zclient, type, buf, + sizeof(buf)); + else + ret = zclient_send_opaque_unicast(zclient, type, proto, + instance, session_id, + buf, sizeof(buf)); + if (ret == ZCLIENT_SEND_FAILURE) { + zlog_debug("%s: send_opaque() failed => %d", + __func__, ret); + break; + } + } + +} + +/* + * Send OPAQUE registration messages, using subtype 'type'. + */ +void sharp_opaque_reg_send(bool is_reg, uint32_t proto, uint32_t instance, + uint32_t session_id, uint32_t type) +{ + struct stream *s; + + s = zclient->obuf; + stream_reset(s); + + if (is_reg) + zclient_create_header(s, ZEBRA_OPAQUE_REGISTER, VRF_DEFAULT); + else + zclient_create_header(s, ZEBRA_OPAQUE_UNREGISTER, VRF_DEFAULT); + + /* Send sub-type */ + stream_putl(s, type); + + /* Add zclient info */ + stream_putc(s, proto); + stream_putw(s, instance); + stream_putl(s, session_id); + + /* Put length at the first point of the stream. */ + stream_putw_at(s, 0, stream_get_endp(s)); + + (void)zclient_send_message(zclient); + +} + +/* Link State registration */ +void sharp_zebra_register_te(void) +{ + /* First register to received Link State Update messages */ + zclient_register_opaque(zclient, LINK_STATE_UPDATE); + + /* Then, request initial TED with SYNC message */ + ls_request_sync(zclient); +} + +void sharp_zebra_send_arp(const struct interface *ifp, const struct prefix *p) +{ + zclient_send_neigh_discovery_req(zclient, ifp, p); +} + +static int nhg_notify_owner(ZAPI_CALLBACK_ARGS) +{ + enum zapi_nhg_notify_owner note; + uint32_t id; + + if (!zapi_nhg_notify_decode(zclient->ibuf, &id, ¬e)) + return -1; + + switch (note) { + case ZAPI_NHG_INSTALLED: + sharp_nhgroup_id_set_installed(id, true); + zlog_debug("Installed nhg %u", id); + break; + case ZAPI_NHG_FAIL_INSTALL: + zlog_debug("Failed install of nhg %u", id); + break; + case ZAPI_NHG_REMOVED: + zlog_debug("Removed nhg %u", id); + break; + case ZAPI_NHG_REMOVE_FAIL: + zlog_debug("Failed removal of nhg %u", id); + break; + } + + return 0; +} + +int sharp_zebra_srv6_manager_get_locator_chunk(const char *locator_name) +{ + return srv6_manager_get_locator_chunk(zclient, locator_name); +} + +int sharp_zebra_srv6_manager_release_locator_chunk(const char *locator_name) +{ + return srv6_manager_release_locator_chunk(zclient, locator_name); +} + +static int sharp_zebra_process_srv6_locator_chunk(ZAPI_CALLBACK_ARGS) +{ + struct stream *s = NULL; + struct srv6_locator_chunk s6c = {}; + struct listnode *node, *nnode; + struct sharp_srv6_locator *loc; + + s = zclient->ibuf; + zapi_srv6_locator_chunk_decode(s, &s6c); + + for (ALL_LIST_ELEMENTS(sg.srv6_locators, node, nnode, loc)) { + struct prefix_ipv6 *chunk = NULL; + struct listnode *chunk_node; + struct prefix_ipv6 *c; + + if (strcmp(loc->name, s6c.locator_name) != 0) { + zlog_err("%s: Locator name unmatch %s:%s", __func__, + loc->name, s6c.locator_name); + continue; + } + + for (ALL_LIST_ELEMENTS_RO(loc->chunks, chunk_node, c)) + if (!prefix_cmp(c, &s6c.prefix)) + return 0; + + chunk = prefix_ipv6_new(); + *chunk = s6c.prefix; + listnode_add(loc->chunks, chunk); + return 0; + } + + zlog_err("%s: can't get locator_chunk!!", __func__); + return 0; +} + +int sharp_zebra_send_interface_protodown(struct interface *ifp, bool down) +{ + zlog_debug("Sending zebra to set %s protodown %s", ifp->name, + down ? "on" : "off"); + + if (zclient_send_interface_protodown(zclient, ifp->vrf->vrf_id, ifp, + down) == ZCLIENT_SEND_FAILURE) + return -1; + + return 0; +} + +static zclient_handler *const sharp_handlers[] = { + [ZEBRA_INTERFACE_ADDRESS_ADD] = interface_address_add, + [ZEBRA_INTERFACE_ADDRESS_DELETE] = interface_address_delete, + [ZEBRA_ROUTE_NOTIFY_OWNER] = route_notify_owner, + [ZEBRA_NEXTHOP_UPDATE] = sharp_nexthop_update, + [ZEBRA_NHG_NOTIFY_OWNER] = nhg_notify_owner, + [ZEBRA_REDISTRIBUTE_ROUTE_ADD] = sharp_redistribute_route, + [ZEBRA_REDISTRIBUTE_ROUTE_DEL] = sharp_redistribute_route, + [ZEBRA_OPAQUE_MESSAGE] = sharp_opaque_handler, + [ZEBRA_SRV6_MANAGER_GET_LOCATOR_CHUNK] = + sharp_zebra_process_srv6_locator_chunk, +}; + +void sharp_zebra_init(void) +{ + struct zclient_options opt = {.receive_notify = true}; + + if_zapi_callbacks(sharp_ifp_create, sharp_ifp_up, + sharp_ifp_down, sharp_ifp_destroy); + + zclient = zclient_new(master, &opt, sharp_handlers, + array_size(sharp_handlers)); + + zclient_init(zclient, ZEBRA_ROUTE_SHARP, 0, &sharp_privs); + zclient->zebra_connected = zebra_connected; + zclient->zebra_buffer_write_ready = sharp_zclient_buffer_ready; +} |