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zapi_msg.c
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zapi_msg.c
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/*
* Zebra API message creation & consumption.
* Portions:
* Copyright (C) 1997-1999 Kunihiro Ishiguro
* Copyright (C) 2015-2018 Cumulus Networks, Inc.
* et al.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include <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/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"
DEFINE_MTYPE_STATIC(ZEBRA, OPAQUE, "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->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:
stream_put(s, &nexthop->gate.ipv6, 16);
break;
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;
default:
/* 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_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_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);
if (!ifp->link_params) {
stream_free(s);
return 0;
}
zclient_create_header(s, ZEBRA_INTERFACE_LINK_PARAMS, ifp->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_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_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;
}
/* Notify client about interface moving from one VRF to another.
* Whether client is interested in old and new VRF is checked by caller.
*/
int zsend_interface_vrf_update(struct zserv *client, struct interface *ifp,
vrf_id_t vrf_id)
{
struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
zclient_create_header(s, ZEBRA_INTERFACE_VRF_UPDATE, ifp->vrf_id);
/* Fill in the name of the interface and its new VRF (id) */
stream_put(s, ifp->name, INTERFACE_NAMSIZ);
stream_putl(s, vrf_id);
/* Write packet size. */
stream_putw_at(s, 0, stream_get_endp(s));
client->if_vrfchg_cnt++;
return zserv_send_message(client, s);
}
/* 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_PREFIXLEN;
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_PREFIXLEN;
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_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 prefix *p,
const struct prefix *src_p,
const struct route_entry *re)
{
struct zapi_route api;
struct zapi_nexthop *api_nh;
struct nexthop *nexthop;
uint8_t count = 0;
afi_t afi;
size_t stream_size =
MAX(ZEBRA_MAX_PACKET_SIZ, sizeof(struct zapi_route));
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;
default:
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:
api_nh->gate.ipv4 = nexthop->gate.ipv4;
break;
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:
api_nh->gate.ipv6 = nexthop->gate.ipv6;
break;
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.
*/
static int zsend_ipv4_nexthop_lookup_mrib(struct zserv *client,
struct in_addr 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_IPV4_NEXTHOP_LOOKUP_MRIB, zvrf_id(zvrf));
stream_put_in_addr(s, &addr);
if (re) {
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);
/*
* Only non-recursive routes are elegible to resolve the
* nexthop we are looking up. Therefore, we will just iterate
* over the top chain of nexthops.
*/
for (nexthop = re->nhe->nhg.nexthop; nexthop;
nexthop = nexthop->next)
if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))
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 prefix *p, 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 %pFX(%u) %d vrf: %u",
zebra_route_string(type), p, table_id, note,
vrf_id);
return 0;
}
if (IS_ZEBRA_DEBUG_PACKET)
zlog_debug(
"Notifying Owner: %s about prefix %pFX(%u) %d vrf: %u",
zebra_route_string(type), p, 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, p->family);
blen = prefix_blen(p);
stream_putc(s, p->prefixlen);
stream_put(s, &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(struct route_entry *re, const struct prefix *p,
enum zapi_route_notify_owner note,
afi_t afi, safi_t safi)
{
return (route_notify_internal(p, 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)
{
return (route_notify_internal(dplane_ctx_get_dest(ctx),
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)));
}
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, VRF_DEFAULT);
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,
uint16_t note)
{
struct listnode *node;
struct zserv *client;
struct stream *s;
struct zebra_pbr_iptable ipt;
uint16_t cmd = ZEBRA_IPTABLE_NOTIFY_OWNER;
if (!dplane_ctx_get_pbr_iptable(ctx, &ipt))
return;
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_put(s, ¬e, sizeof(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, uint16_t note)
{
struct listnode *node;
struct zserv *client;
struct stream *s;
struct zebra_pbr_ipset ipset;
uint16_t cmd = ZEBRA_IPSET_NOTIFY_OWNER;
if (!dplane_ctx_get_pbr_ipset(ctx, &ipset))
return;
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_put(s, ¬e, sizeof(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,
uint16_t 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;
if (!dplane_ctx_get_pbr_ipset_entry(ctx, &ipent))
return;
if (!dplane_ctx_get_pbr_ipset(ctx, &ipset))
return;
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_put(s, ¬e, sizeof(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);
}
/* 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));