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-rw-r--r--bgpd/rfapi/vnc_zebra.c887
1 files changed, 887 insertions, 0 deletions
diff --git a/bgpd/rfapi/vnc_zebra.c b/bgpd/rfapi/vnc_zebra.c
new file mode 100644
index 0000000..c886bee
--- /dev/null
+++ b/bgpd/rfapi/vnc_zebra.c
@@ -0,0 +1,887 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * Copyright 2009-2016, LabN Consulting, L.L.C.
+ *
+ */
+
+/*
+ * File: vnc_zebra.c
+ * Purpose: Handle exchange of routes between VNC and Zebra
+ */
+
+#include "lib/zebra.h"
+#include "lib/prefix.h"
+#include "lib/agg_table.h"
+#include "lib/log.h"
+#include "lib/command.h"
+#include "lib/zclient.h"
+#include "lib/stream.h"
+#include "lib/ringbuf.h"
+#include "lib/memory.h"
+#include "lib/lib_errors.h"
+
+#include "bgpd/bgpd.h"
+#include "bgpd/bgp_ecommunity.h"
+#include "bgpd/bgp_route.h"
+#include "bgpd/bgp_debug.h"
+#include "bgpd/bgp_advertise.h"
+
+#include "bgpd/rfapi/bgp_rfapi_cfg.h"
+#include "bgpd/rfapi/rfapi.h"
+#include "bgpd/rfapi/rfapi_import.h"
+#include "bgpd/rfapi/rfapi_private.h"
+#include "bgpd/rfapi/vnc_zebra.h"
+#include "bgpd/rfapi/rfapi_vty.h"
+#include "bgpd/rfapi/rfapi_backend.h"
+#include "bgpd/rfapi/vnc_debug.h"
+
+static struct rfapi_descriptor vncHD1VR; /* Single-VR export dummy nve descr */
+static struct zclient *zclient_vnc = NULL;
+
+/***********************************************************************
+ * REDISTRIBUTE: Zebra sends updates/withdraws to BGPD
+ ***********************************************************************/
+
+/*
+ * Routes coming from zebra get added to VNC here
+ */
+static void vnc_redistribute_add(struct prefix *p, uint32_t metric,
+ uint8_t type)
+{
+ struct bgp *bgp = bgp_get_default();
+ struct prefix_rd prd;
+ struct rfapi_ip_addr vnaddr;
+ afi_t afi;
+ uint32_t local_pref =
+ rfp_cost_to_localpref(metric > 255 ? 255 : metric);
+
+ if (!bgp)
+ return;
+
+ if (!bgp->rfapi_cfg) {
+ vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping",
+ __func__);
+ return;
+ }
+
+ afi = family2afi(p->family);
+ if (!afi) {
+ vnc_zlog_debug_verbose("%s: unknown prefix address family %d",
+ __func__, p->family);
+ return;
+ }
+
+ if (!bgp->rfapi_cfg->redist[afi][type]) {
+ vnc_zlog_debug_verbose(
+ "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d] is 0, skipping",
+ __func__, afi, type);
+ return;
+ }
+ if (!bgp->rfapi_cfg->rfg_redist) {
+ vnc_zlog_debug_verbose("%s: no redist nve group, skipping",
+ __func__);
+ return;
+ }
+
+ /*
+ * Assume nve group's configured VN address prefix is a host
+ * route which also happens to give the NVE VN address to use
+ * for redistributing into VNC.
+ */
+ vnaddr.addr_family = bgp->rfapi_cfg->rfg_redist->vn_prefix.family;
+ switch (bgp->rfapi_cfg->rfg_redist->vn_prefix.family) {
+ case AF_INET:
+ if (bgp->rfapi_cfg->rfg_redist->vn_prefix.prefixlen
+ != IPV4_MAX_BITLEN) {
+ vnc_zlog_debug_verbose(
+ "%s: redist nve group VN prefix len (%d) != 32, skipping",
+ __func__,
+ bgp->rfapi_cfg->rfg_redist->vn_prefix
+ .prefixlen);
+ return;
+ }
+ vnaddr.addr.v4 =
+ bgp->rfapi_cfg->rfg_redist->vn_prefix.u.prefix4;
+ break;
+ case AF_INET6:
+ if (bgp->rfapi_cfg->rfg_redist->vn_prefix.prefixlen
+ != IPV6_MAX_BITLEN) {
+ vnc_zlog_debug_verbose(
+ "%s: redist nve group VN prefix len (%d) != 128, skipping",
+ __func__,
+ bgp->rfapi_cfg->rfg_redist->vn_prefix
+ .prefixlen);
+ return;
+ }
+ vnaddr.addr.v6 =
+ bgp->rfapi_cfg->rfg_redist->vn_prefix.u.prefix6;
+ break;
+ default:
+ vnc_zlog_debug_verbose(
+ "%s: no redist nve group VN host prefix configured, skipping",
+ __func__);
+ return;
+ }
+
+ /*
+ * Assume nve group's configured UN address prefix is a host
+ * route which also happens to give the NVE UN address to use
+ * for redistributing into VNC.
+ */
+
+ /*
+ * Set UN address in dummy nve descriptor so add_vnc_route
+ * can use it in VNC tunnel SubTLV
+ */
+ {
+ struct rfapi_ip_prefix pfx_un;
+
+ rfapiQprefix2Rprefix(&bgp->rfapi_cfg->rfg_redist->un_prefix,
+ &pfx_un);
+
+ switch (pfx_un.prefix.addr_family) {
+ case AF_INET:
+ if (pfx_un.length != IPV4_MAX_BITLEN) {
+ vnc_zlog_debug_verbose(
+ "%s: redist nve group UN prefix len (%d) != 32, skipping",
+ __func__, pfx_un.length);
+ return;
+ }
+ break;
+ case AF_INET6:
+ if (pfx_un.length != IPV6_MAX_BITLEN) {
+ vnc_zlog_debug_verbose(
+ "%s: redist nve group UN prefix len (%d) != 128, skipping",
+ __func__, pfx_un.length);
+ return;
+ }
+ break;
+ default:
+ vnc_zlog_debug_verbose(
+ "%s: no redist nve group UN host prefix configured, skipping",
+ __func__);
+ return;
+ }
+
+ vncHD1VR.un_addr = pfx_un.prefix;
+
+ if (!vncHD1VR.peer) {
+ /*
+ * Same setup as in rfapi_open()
+ */
+ vncHD1VR.peer = peer_new(bgp);
+ vncHD1VR.peer->connection->status =
+ Established; /* keep bgp core happy */
+
+ bgp_peer_connection_buffers_free(
+ vncHD1VR.peer->connection);
+
+ /* base code assumes have valid host pointer */
+ vncHD1VR.peer->host =
+ XSTRDUP(MTYPE_BGP_PEER_HOST, ".zebra.");
+
+ /* Mark peer as belonging to HD */
+ SET_FLAG(vncHD1VR.peer->flags, PEER_FLAG_IS_RFAPI_HD);
+ }
+ }
+
+ memset(&prd, 0, sizeof(prd));
+ prd = bgp->rfapi_cfg->rfg_redist->rd;
+ prd.family = AF_UNSPEC;
+ prd.prefixlen = 64;
+
+ add_vnc_route(&vncHD1VR, /* cookie + UN addr */
+ bgp, SAFI_MPLS_VPN, p, &prd, &vnaddr, &local_pref,
+ &(bgp->rfapi_cfg->redist_lifetime),
+ NULL, /* RFP options */
+ NULL, /* struct rfapi_un_option */
+ NULL, /* struct rfapi_vn_option */
+ bgp->rfapi_cfg->rfg_redist->rt_export_list, NULL,
+ NULL, /* label: default */
+ type, BGP_ROUTE_REDISTRIBUTE, 0); /* flags */
+}
+
+/*
+ * Route deletions from zebra propagate to VNC here
+ */
+static void vnc_redistribute_delete(struct prefix *p, uint8_t type)
+{
+ struct bgp *bgp = bgp_get_default();
+ struct prefix_rd prd;
+ afi_t afi;
+
+ if (!bgp)
+ return;
+
+ if (!bgp->rfapi_cfg) {
+ vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping",
+ __func__);
+ return;
+ }
+ afi = family2afi(p->family);
+ if (!afi) {
+ vnc_zlog_debug_verbose("%s: unknown prefix address family %d",
+ __func__, p->family);
+ return;
+ }
+ if (!bgp->rfapi_cfg->redist[afi][type]) {
+ vnc_zlog_debug_verbose(
+ "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d] is 0, skipping",
+ __func__, afi, type);
+ return;
+ }
+ if (!bgp->rfapi_cfg->rfg_redist) {
+ vnc_zlog_debug_verbose("%s: no redist nve group, skipping",
+ __func__);
+ return;
+ }
+
+ memset(&prd, 0, sizeof(prd));
+ prd = bgp->rfapi_cfg->rfg_redist->rd;
+ prd.family = AF_UNSPEC;
+ prd.prefixlen = 64;
+
+ del_vnc_route(&vncHD1VR, /* use dummy ptr as cookie */
+ vncHD1VR.peer, bgp, SAFI_MPLS_VPN, p, &prd, type,
+ BGP_ROUTE_REDISTRIBUTE, NULL, 0);
+}
+
+/*
+ * Flush all redistributed routes of type <type>
+ */
+static void vnc_redistribute_withdraw(struct bgp *bgp, afi_t afi, uint8_t type)
+{
+ struct prefix_rd prd;
+ struct bgp_table *table;
+ struct bgp_dest *pdest;
+ struct bgp_dest *dest;
+
+ vnc_zlog_debug_verbose("%s: entry", __func__);
+
+ if (!bgp)
+ return;
+ if (!bgp->rfapi_cfg) {
+ vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping",
+ __func__);
+ return;
+ }
+
+ /*
+ * Loop over all the RDs
+ */
+ for (pdest = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); pdest;
+ pdest = bgp_route_next(pdest)) {
+ const struct prefix *pdest_p = bgp_dest_get_prefix(pdest);
+
+ memset(&prd, 0, sizeof(prd));
+ prd.family = AF_UNSPEC;
+ prd.prefixlen = 64;
+ memcpy(prd.val, pdest_p->u.val, 8);
+
+ /* This is the per-RD table of prefixes */
+ table = bgp_dest_get_bgp_table_info(pdest);
+ if (!table)
+ continue;
+
+ for (dest = bgp_table_top(table); dest;
+ dest = bgp_route_next(dest)) {
+
+ struct bgp_path_info *ri;
+
+ for (ri = bgp_dest_get_bgp_path_info(dest); ri;
+ ri = ri->next) {
+ if (ri->type
+ == type) { /* has matching redist type */
+ break;
+ }
+ }
+ if (ri) {
+ del_vnc_route(
+ &vncHD1VR, /* use dummy ptr as cookie */
+ vncHD1VR.peer, bgp, SAFI_MPLS_VPN,
+ bgp_dest_get_prefix(dest), &prd, type,
+ BGP_ROUTE_REDISTRIBUTE, NULL, 0);
+ }
+ }
+ }
+ vnc_zlog_debug_verbose("%s: return", __func__);
+}
+
+/*
+ * Zebra route add and delete treatment.
+ *
+ * Assumes 1 nexthop
+ */
+static int vnc_zebra_read_route(ZAPI_CALLBACK_ARGS)
+{
+ struct zapi_route api;
+ int add;
+
+ if (zapi_route_decode(zclient->ibuf, &api) < 0)
+ return -1;
+
+ /* we completely ignore srcdest routes for now. */
+ if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
+ return 0;
+
+ add = (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD);
+ if (add)
+ vnc_redistribute_add(&api.prefix, api.metric, api.type);
+ else
+ vnc_redistribute_delete(&api.prefix, api.type);
+
+ if (BGP_DEBUG(zebra, ZEBRA))
+ vnc_zlog_debug_verbose(
+ "%s: Zebra rcvd: route delete %s %pFX metric %u",
+ __func__, zebra_route_string(api.type), &api.prefix,
+ api.metric);
+
+ return 0;
+}
+
+/***********************************************************************
+ * vnc_bgp_zebra_*: VNC sends updates/withdraws to Zebra
+ ***********************************************************************/
+
+/*
+ * low-level message builder
+ */
+static void vnc_zebra_route_msg(const struct prefix *p, unsigned int nhp_count,
+ void *nhp_ary, int add) /* 1 = add, 0 = del */
+{
+ struct zapi_route api;
+ struct zapi_nexthop *api_nh;
+ int i;
+ struct in_addr **nhp_ary4 = nhp_ary;
+ struct in6_addr **nhp_ary6 = nhp_ary;
+
+ if (!nhp_count) {
+ vnc_zlog_debug_verbose("%s: empty nexthop list, skipping",
+ __func__);
+ return;
+ }
+
+ memset(&api, 0, sizeof(api));
+ api.vrf_id = VRF_DEFAULT;
+ api.type = ZEBRA_ROUTE_VNC;
+ api.safi = SAFI_UNICAST;
+ api.prefix = *p;
+
+ /* Nexthops */
+ SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
+ api.nexthop_num = MIN(nhp_count, multipath_num);
+ for (i = 0; i < api.nexthop_num; i++) {
+
+ api_nh = &api.nexthops[i];
+ api_nh->vrf_id = VRF_DEFAULT;
+ switch (p->family) {
+ case AF_INET:
+ memcpy(&api_nh->gate.ipv4, nhp_ary4[i],
+ sizeof(api_nh->gate.ipv4));
+ api_nh->type = NEXTHOP_TYPE_IPV4;
+ break;
+ case AF_INET6:
+ memcpy(&api_nh->gate.ipv6, nhp_ary6[i],
+ sizeof(api_nh->gate.ipv6));
+ api_nh->type = NEXTHOP_TYPE_IPV6;
+ break;
+ }
+ }
+
+ if (BGP_DEBUG(zebra, ZEBRA))
+ vnc_zlog_debug_verbose(
+ "%s: Zebra send: route %s %pFX, nhp_count=%d", __func__,
+ (add ? "add" : "del"), &api.prefix, nhp_count);
+
+ zclient_route_send((add ? ZEBRA_ROUTE_ADD : ZEBRA_ROUTE_DELETE),
+ zclient_vnc, &api);
+}
+
+
+static void
+nve_list_to_nh_array(uint8_t family, struct list *nve_list,
+ unsigned int *nh_count_ret,
+ void **nh_ary_ret, /* returned address array */
+ void **nhp_ary_ret) /* returned pointer array */
+{
+ int nve_count = listcount(nve_list);
+
+ *nh_count_ret = 0;
+ *nh_ary_ret = NULL;
+ *nhp_ary_ret = NULL;
+
+ if (!nve_count) {
+ vnc_zlog_debug_verbose("%s: empty nve_list, skipping",
+ __func__);
+ return;
+ }
+
+ if (family == AF_INET) {
+ struct listnode *ln;
+ struct in_addr *iap;
+ struct in_addr **v;
+
+ /*
+ * Array of nexthop addresses
+ */
+ *nh_ary_ret =
+ XCALLOC(MTYPE_TMP, nve_count * sizeof(struct in_addr));
+
+ /*
+ * Array of pointers to nexthop addresses
+ */
+ *nhp_ary_ret = XCALLOC(MTYPE_TMP,
+ nve_count * sizeof(struct in_addr *));
+ iap = *nh_ary_ret;
+ v = *nhp_ary_ret;
+
+ for (ln = listhead(nve_list); ln; ln = listnextnode(ln)) {
+
+ struct rfapi_descriptor *irfd;
+ struct prefix nhp;
+
+ irfd = listgetdata(ln);
+
+ if (rfapiRaddr2Qprefix(&irfd->vn_addr, &nhp))
+ continue;
+
+ *iap = nhp.u.prefix4;
+ *v = iap;
+ vnc_zlog_debug_verbose(
+ "%s: ipadr: (%p)<-0x%x, ptr: (%p)<-%p",
+ __func__, iap, nhp.u.prefix4.s_addr, v, iap);
+
+ ++iap;
+ ++v;
+ ++*nh_count_ret;
+ }
+
+ } else if (family == AF_INET6) {
+
+ struct listnode *ln;
+
+ *nh_ary_ret =
+ XCALLOC(MTYPE_TMP, nve_count * sizeof(struct in6_addr));
+
+ *nhp_ary_ret = XCALLOC(MTYPE_TMP,
+ nve_count * sizeof(struct in6_addr *));
+
+ for (ln = listhead(nve_list); ln; ln = listnextnode(ln)) {
+
+ struct rfapi_descriptor *irfd;
+ struct in6_addr *iap = *nh_ary_ret;
+ struct in6_addr **v = *nhp_ary_ret;
+ struct prefix nhp;
+
+ irfd = listgetdata(ln);
+
+ if (rfapiRaddr2Qprefix(&irfd->vn_addr, &nhp))
+ continue;
+
+ *iap = nhp.u.prefix6;
+ *v = iap;
+
+ ++iap;
+ ++v;
+ ++*nh_count_ret;
+ }
+ }
+}
+
+static void import_table_to_nve_list_zebra(struct bgp *bgp,
+ struct rfapi_import_table *it,
+ struct list **nves, uint8_t family)
+{
+ struct listnode *node;
+ struct rfapi_rfg_name *rfgn;
+
+ /*
+ * Loop over the list of NVE-Groups configured for
+ * exporting to direct-bgp.
+ *
+ * Build a list of NVEs that use this import table
+ */
+ *nves = NULL;
+ for (ALL_LIST_ELEMENTS_RO(bgp->rfapi_cfg->rfg_export_zebra_l, node,
+ rfgn)) {
+
+ /*
+ * If this NVE-Group's import table matches the current one
+ */
+ if (rfgn->rfg && rfgn->rfg->nves
+ && rfgn->rfg->rfapi_import_table == it) {
+
+ nve_group_to_nve_list(rfgn->rfg, nves, family);
+ }
+ }
+}
+
+static void vnc_zebra_add_del_prefix(struct bgp *bgp,
+ struct rfapi_import_table *import_table,
+ struct agg_node *rn,
+ int add) /* !0 = add, 0 = del */
+{
+ struct list *nves;
+ const struct prefix *p = agg_node_get_prefix(rn);
+ unsigned int nexthop_count = 0;
+ void *nh_ary = NULL;
+ void *nhp_ary = NULL;
+
+ vnc_zlog_debug_verbose("%s: entry, add=%d", __func__, add);
+
+ if (zclient_vnc->sock < 0)
+ return;
+
+ if (p->family != AF_INET && p->family != AF_INET6) {
+ flog_err(EC_LIB_DEVELOPMENT,
+ "%s: invalid route node addr family", __func__);
+ return;
+ }
+
+ if (!vrf_bitmap_check(&zclient_vnc->redist[family2afi(p->family)]
+ [ZEBRA_ROUTE_VNC],
+ VRF_DEFAULT))
+ return;
+
+ if (!bgp->rfapi_cfg) {
+ vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping",
+ __func__);
+ return;
+ }
+ if (!listcount(bgp->rfapi_cfg->rfg_export_zebra_l)) {
+ vnc_zlog_debug_verbose(
+ "%s: no zebra export nve group, skipping", __func__);
+ return;
+ }
+
+ import_table_to_nve_list_zebra(bgp, import_table, &nves, p->family);
+
+ if (nves) {
+ nve_list_to_nh_array(p->family, nves, &nexthop_count, &nh_ary,
+ &nhp_ary);
+
+ list_delete(&nves);
+
+ if (nexthop_count)
+ vnc_zebra_route_msg(p, nexthop_count, nhp_ary, add);
+ }
+
+ XFREE(MTYPE_TMP, nhp_ary);
+ XFREE(MTYPE_TMP, nh_ary);
+}
+
+void vnc_zebra_add_prefix(struct bgp *bgp,
+ struct rfapi_import_table *import_table,
+ struct agg_node *rn)
+{
+ vnc_zebra_add_del_prefix(bgp, import_table, rn, 1);
+}
+
+void vnc_zebra_del_prefix(struct bgp *bgp,
+ struct rfapi_import_table *import_table,
+ struct agg_node *rn)
+{
+ vnc_zebra_add_del_prefix(bgp, import_table, rn, 0);
+}
+
+
+static void vnc_zebra_add_del_nve(struct bgp *bgp, struct rfapi_descriptor *rfd,
+ int add) /* 0 = del, !0 = add */
+{
+ struct listnode *node;
+ struct rfapi_rfg_name *rfgn;
+ struct rfapi_nve_group_cfg *rfg = rfd->rfg;
+ afi_t afi = family2afi(rfd->vn_addr.addr_family);
+ struct prefix nhp;
+ void *pAddr;
+
+ vnc_zlog_debug_verbose("%s: entry, add=%d", __func__, add);
+
+ if (zclient_vnc->sock < 0)
+ return;
+
+ if (!vrf_bitmap_check(&zclient_vnc->redist[afi][ZEBRA_ROUTE_VNC],
+ VRF_DEFAULT))
+ return;
+
+ if (afi != AFI_IP && afi != AFI_IP6) {
+ flog_err(EC_LIB_DEVELOPMENT, "%s: invalid vn addr family",
+ __func__);
+ return;
+ }
+
+ if (!bgp)
+ return;
+ if (!bgp->rfapi_cfg) {
+ vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping",
+ __func__);
+ return;
+ }
+
+ if (rfapiRaddr2Qprefix(&rfd->vn_addr, &nhp)) {
+ vnc_zlog_debug_verbose("%s: can't convert vn address, skipping",
+ __func__);
+ return;
+ }
+
+ pAddr = &nhp.u.val;
+
+ /*
+ * Loop over the list of NVE-Groups configured for
+ * exporting to zebra and see if this new NVE's
+ * group is among them.
+ */
+ for (ALL_LIST_ELEMENTS_RO(bgp->rfapi_cfg->rfg_export_zebra_l, node,
+ rfgn)) {
+
+ /*
+ * Yes, this NVE's group is configured for export to zebra
+ */
+ if (rfgn->rfg == rfg) {
+
+ struct agg_table *rt = NULL;
+ struct agg_node *rn;
+ struct rfapi_import_table *import_table;
+ import_table = rfg->rfapi_import_table;
+
+ vnc_zlog_debug_verbose(
+ "%s: this nve's group is in zebra export list",
+ __func__);
+
+ rt = import_table->imported_vpn[afi];
+
+ /*
+ * Walk the NVE-Group's VNC Import table
+ */
+ for (rn = agg_route_top(rt); rn;
+ rn = agg_route_next(rn)) {
+ if (!rn->info)
+ continue;
+
+ vnc_zlog_debug_verbose("%s: sending %s",
+ __func__,
+ (add ? "add" : "del"));
+ vnc_zebra_route_msg(agg_node_get_prefix(rn), 1,
+ &pAddr, add);
+ }
+ }
+ }
+}
+
+void vnc_zebra_add_nve(struct bgp *bgp, struct rfapi_descriptor *rfd)
+{
+ vnc_zebra_add_del_nve(bgp, rfd, 1);
+}
+
+void vnc_zebra_del_nve(struct bgp *bgp, struct rfapi_descriptor *rfd)
+{
+ vnc_zebra_add_del_nve(bgp, rfd, 0);
+}
+
+static void vnc_zebra_add_del_group_afi(struct bgp *bgp,
+ struct rfapi_nve_group_cfg *rfg,
+ afi_t afi, int add)
+{
+ struct agg_table *rt = NULL;
+ struct agg_node *rn;
+ struct rfapi_import_table *import_table;
+ uint8_t family = afi2family(afi);
+
+ struct list *nves = NULL;
+ unsigned int nexthop_count = 0;
+ void *nh_ary = NULL;
+ void *nhp_ary = NULL;
+
+ vnc_zlog_debug_verbose("%s: entry", __func__);
+ import_table = rfg->rfapi_import_table;
+ if (!import_table) {
+ vnc_zlog_debug_verbose(
+ "%s: import table not defined, returning", __func__);
+ return;
+ }
+
+ if (afi == AFI_IP || afi == AFI_IP6) {
+ rt = import_table->imported_vpn[afi];
+ } else {
+ flog_err(EC_LIB_DEVELOPMENT, "%s: bad afi %d", __func__, afi);
+ return;
+ }
+
+ if (!family) {
+ flog_err(EC_LIB_DEVELOPMENT, "%s: computed bad family: %d",
+ __func__, family);
+ return;
+ }
+
+ if (!rfg->nves) {
+ /* avoid segfault below if list doesn't exist */
+ vnc_zlog_debug_verbose("%s: no NVEs in this group", __func__);
+ return;
+ }
+
+ nve_group_to_nve_list(rfg, &nves, family);
+ if (nves) {
+ vnc_zlog_debug_verbose("%s: have nves", __func__);
+ nve_list_to_nh_array(family, nves, &nexthop_count, &nh_ary,
+ &nhp_ary);
+
+ vnc_zlog_debug_verbose("%s: family: %d, nve count: %d",
+ __func__, family, nexthop_count);
+
+ list_delete(&nves);
+
+ if (nexthop_count) {
+ /*
+ * Walk the NVE-Group's VNC Import table
+ */
+ for (rn = agg_route_top(rt); rn;
+ rn = agg_route_next(rn)) {
+ if (rn->info) {
+ vnc_zebra_route_msg(
+ agg_node_get_prefix(rn),
+ nexthop_count, nhp_ary, add);
+ }
+ }
+ }
+ XFREE(MTYPE_TMP, nhp_ary);
+ XFREE(MTYPE_TMP, nh_ary);
+ }
+}
+
+void vnc_zebra_add_group(struct bgp *bgp, struct rfapi_nve_group_cfg *rfg)
+{
+ vnc_zebra_add_del_group_afi(bgp, rfg, AFI_IP, 1);
+ vnc_zebra_add_del_group_afi(bgp, rfg, AFI_IP6, 1);
+}
+
+void vnc_zebra_del_group(struct bgp *bgp, struct rfapi_nve_group_cfg *rfg)
+{
+ vnc_zlog_debug_verbose("%s: entry", __func__);
+ vnc_zebra_add_del_group_afi(bgp, rfg, AFI_IP, 0);
+ vnc_zebra_add_del_group_afi(bgp, rfg, AFI_IP6, 0);
+}
+
+void vnc_zebra_reexport_group_afi(struct bgp *bgp,
+ struct rfapi_nve_group_cfg *rfg, afi_t afi)
+{
+ struct listnode *node;
+ struct rfapi_rfg_name *rfgn;
+
+ for (ALL_LIST_ELEMENTS_RO(bgp->rfapi_cfg->rfg_export_zebra_l, node,
+ rfgn)) {
+
+ if (rfgn->rfg == rfg) {
+ vnc_zebra_add_del_group_afi(bgp, rfg, afi, 0);
+ vnc_zebra_add_del_group_afi(bgp, rfg, afi, 1);
+ break;
+ }
+ }
+}
+
+
+/***********************************************************************
+ * CONTROL INTERFACE
+ ***********************************************************************/
+
+
+/* Other routes redistribution into BGP. */
+int vnc_redistribute_set(struct bgp *bgp, afi_t afi, int type)
+{
+ if (!bgp->rfapi_cfg) {
+ return CMD_WARNING_CONFIG_FAILED;
+ }
+
+ /* Set flag to BGP instance. */
+ bgp->rfapi_cfg->redist[afi][type] = 1;
+
+ // bgp->redist[afi][type] = 1;
+
+ /* Return if already redistribute flag is set. */
+ if (vrf_bitmap_check(&zclient_vnc->redist[afi][type], VRF_DEFAULT))
+ return CMD_WARNING_CONFIG_FAILED;
+
+ vrf_bitmap_set(&zclient_vnc->redist[afi][type], VRF_DEFAULT);
+
+ // vrf_bitmap_set(&zclient_vnc->redist[afi][type], VRF_DEFAULT);
+
+ /* Return if zebra connection is not established. */
+ if (zclient_vnc->sock < 0)
+ return CMD_WARNING_CONFIG_FAILED;
+
+ if (BGP_DEBUG(zebra, ZEBRA))
+ vnc_zlog_debug_verbose("Zebra send: redistribute add %s",
+ zebra_route_string(type));
+
+ /* Send distribute add message to zebra. */
+ zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient_vnc, afi, type,
+ 0, VRF_DEFAULT);
+
+ return CMD_SUCCESS;
+}
+
+/* Unset redistribution. */
+int vnc_redistribute_unset(struct bgp *bgp, afi_t afi, int type)
+{
+ vnc_zlog_debug_verbose("%s: type=%d entry", __func__, type);
+
+ if (!bgp->rfapi_cfg) {
+ vnc_zlog_debug_verbose("%s: return (no rfapi_cfg)", __func__);
+ return CMD_WARNING_CONFIG_FAILED;
+ }
+
+ /* Unset flag from BGP instance. */
+ bgp->rfapi_cfg->redist[afi][type] = 0;
+
+ /* Return if zebra connection is disabled. */
+ if (!vrf_bitmap_check(&zclient_vnc->redist[afi][type], VRF_DEFAULT))
+ return CMD_WARNING_CONFIG_FAILED;
+ vrf_bitmap_unset(&zclient_vnc->redist[afi][type], VRF_DEFAULT);
+
+ if (bgp->rfapi_cfg->redist[AFI_IP][type] == 0
+ && bgp->rfapi_cfg->redist[AFI_IP6][type] == 0
+ && zclient_vnc->sock >= 0) {
+ /* Send distribute delete message to zebra. */
+ if (BGP_DEBUG(zebra, ZEBRA))
+ vnc_zlog_debug_verbose(
+ "Zebra send: redistribute delete %s",
+ zebra_route_string(type));
+ zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient_vnc,
+ afi, type, 0, VRF_DEFAULT);
+ }
+
+ /* Withdraw redistributed routes from current BGP's routing table. */
+ vnc_redistribute_withdraw(bgp, afi, type);
+
+ vnc_zlog_debug_verbose("%s: return", __func__);
+
+ return CMD_SUCCESS;
+}
+
+extern struct zebra_privs_t bgpd_privs;
+
+static zclient_handler *const vnc_handlers[] = {
+ [ZEBRA_REDISTRIBUTE_ROUTE_ADD] = vnc_zebra_read_route,
+ [ZEBRA_REDISTRIBUTE_ROUTE_DEL] = vnc_zebra_read_route,
+};
+
+/*
+ * Modeled after bgp_zebra.c'bgp_zebra_init()
+ * Charriere asks, "Is it possible to carry two?"
+ */
+void vnc_zebra_init(struct event_loop *master)
+{
+ /* Set default values. */
+ zclient_vnc = zclient_new(master, &zclient_options_default,
+ vnc_handlers, array_size(vnc_handlers));
+ zclient_init(zclient_vnc, ZEBRA_ROUTE_VNC, 0, &bgpd_privs);
+}
+
+void vnc_zebra_destroy(void)
+{
+ if (zclient_vnc == NULL)
+ return;
+ zclient_stop(zclient_vnc);
+ zclient_free(zclient_vnc);
+ zclient_vnc = NULL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 08:50:45 +0000