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mirror_frr/zebra/zapi_msg.c
Donald Sharp 9a0d4dd39b zebra: Remove nexthop_active_num from route entry 
The nexthop_active_num data structure is a property of the
nexthop group.  Move the keeping of this data to that.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
2019-10-25 11:13:36 -04:00

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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/command.h"
#include "lib/if.h"
#include "lib/thread.h"
#include "lib/stream.h"
#include "lib/memory.h"
#include "lib/table.h"
#include "lib/network.h"
#include "lib/sockunion.h"
#include "lib/log.h"
#include "lib/zclient.h"
#include "lib/privs.h"
#include "lib/network.h"
#include "lib/buffer.h"
#include "lib/nexthop.h"
#include "lib/vrf.h"
#include "lib/libfrr.h"
#include "lib/sockopt.h"
#include "zebra/zebra_router.h"
#include "zebra/rib.h"
#include "zebra/zebra_memory.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/rt_netlink.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/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"
/* 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);
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;
}
/* 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))
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))
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->ng->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;
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) {
char buf_prefix[PREFIX_STRLEN];
prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
zlog_debug("%s: %s to client %s: type %s, vrf_id %d, p %s",
__func__, zserv_command_string(cmd),
zebra_route_string(client->proto),
zebra_route_string(api.type), api.vrf_id,
buf_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->ng->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);
}
/*
* 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)
{
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) {
char buff[PREFIX_STRLEN];
zlog_debug(
"Not Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
type, prefix2str(p, buff, sizeof(buff)),
table_id, note, vrf_id);
}
return 0;
}
if (IS_ZEBRA_DEBUG_PACKET) {
char buff[PREFIX_STRLEN];
zlog_debug("Notifying Owner: %u about prefix %s(%u) %d vrf: %u",
type, prefix2str(p, buff, sizeof(buff)),
table_id, note, vrf_id);
}
s = stream_new(ZEBRA_MAX_PACKET_SIZ);
stream_reset(s);
zclient_create_header(s, ZEBRA_ROUTE_NOTIFY_OWNER, vrf_id);
stream_put(s, &note, 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);
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)
{
return (route_notify_internal(p, re->type, re->instance, re->vrf_id,
re->table, note));
}
/*
* 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));
}
void zsend_rule_notify_owner(struct zebra_pbr_rule *rule,
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", __PRETTY_FUNCTION__,
rule->rule.unique);
for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
if (rule->sock == 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, &note, sizeof(note));
stream_putl(s, rule->rule.seq);
stream_putl(s, rule->rule.priority);
stream_putl(s, rule->rule.unique);
stream_putl(s, rule->rule.ifindex);
stream_putw_at(s, 0, stream_get_endp(s));
zserv_send_message(client, s);
}
void zsend_ipset_notify_owner(struct zebra_pbr_ipset *ipset,
enum zapi_ipset_notify_owner note)
{
struct listnode *node;
struct zserv *client;
struct stream *s;
if (IS_ZEBRA_DEBUG_PACKET)
zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
ipset->unique);
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, ZEBRA_IPSET_NOTIFY_OWNER, VRF_DEFAULT);
stream_put(s, &note, 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(struct zebra_pbr_ipset_entry *ipset,
enum zapi_ipset_entry_notify_owner note)
{
struct listnode *node;
struct zserv *client;
struct stream *s;
if (IS_ZEBRA_DEBUG_PACKET)
zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
ipset->unique);
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, ZEBRA_IPSET_ENTRY_NOTIFY_OWNER, VRF_DEFAULT);
stream_put(s, &note, sizeof(note));
stream_putl(s, ipset->unique);
stream_put(s, ipset->backpointer->ipset_name, ZEBRA_IPSET_NAME_SIZE);
stream_putw_at(s, 0, stream_get_endp(s));
zserv_send_message(client, s);
}
void zsend_iptable_notify_owner(struct zebra_pbr_iptable *iptable,
enum zapi_iptable_notify_owner note)
{
struct listnode *node;
struct zserv *client;
struct stream *s;
if (IS_ZEBRA_DEBUG_PACKET)
zlog_debug("%s: Notifying %u", __PRETTY_FUNCTION__,
iptable->unique);
for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
if (iptable->sock == client->sock)
break;
}
if (!client)
return;
s = stream_new(ZEBRA_MAX_PACKET_SIZ);
zclient_create_header(s, ZEBRA_IPTABLE_NOTIFY_OWNER, VRF_DEFAULT);
stream_put(s, &note, sizeof(note));
stream_putl(s, iptable->unique);
stream_putw_at(s, 0, stream_get_endp(s));
zserv_send_message(client, s);
}
/* Router-id is updated. Send ZEBRA_ROUTER_ID_ADD to client. */
int zsend_router_id_update(struct zserv *client, struct prefix *p,
vrf_id_t vrf_id)
{
int blen;
/* Check this client need interface information. */
if (!vrf_bitmap_check(client->ridinfo, vrf_id))
return 0;
struct stream *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, IF_NAMESIZE);
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,
uint8_t proto, uint16_t instance,
struct label_manager_chunk *lmc)
{
int ret;
struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, vrf_id);
/* proto */
stream_putc(s, proto);
/* instance */
stream_putw(s, 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));
ret = writen(client->sock, s->data, stream_get_endp(s));
stream_free(s);
return ret;
}
/* 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)
{
int ret;
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));
ret = writen(client->sock, s->data, stream_get_endp(s));
stream_free(s);
return ret;
}
/* 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);
}
/* Inbound message handling ------------------------------------------------ */
int cmd2type[] = {
[ZEBRA_NEXTHOP_REGISTER] = RNH_NEXTHOP_TYPE,
[ZEBRA_NEXTHOP_UNREGISTER] = RNH_NEXTHOP_TYPE,
[ZEBRA_IMPORT_ROUTE_REGISTER] = RNH_IMPORT_CHECK_TYPE,
[ZEBRA_IMPORT_ROUTE_UNREGISTER] = RNH_IMPORT_CHECK_TYPE,
};
/* 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 flags = 0;
uint16_t type = cmd2type[hdr->command];
bool exist;
bool flag_changed = false;
uint8_t orig_flags;
if (IS_ZEBRA_DEBUG_NHT)
zlog_debug(
"rnh_register msg from client %s: hdr->length=%d, type=%s vrf=%u\n",
zebra_route_string(client->proto), hdr->length,
(type == RNH_NEXTHOP_TYPE) ? "nexthop" : "route",
zvrf->vrf->vrf_id);
s = msg;
client->nh_reg_time = monotime(NULL);
while (l < hdr->length) {
STREAM_GETC(s, flags);
STREAM_GETW(s, p.family);
STREAM_GETC(s, p.prefixlen);
l += 4;
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",
__PRETTY_FUNCTION__, 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",
__PRETTY_FUNCTION__, 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\n",
p.family);
return;
}
rnh = zebra_add_rnh(&p, zvrf_id(zvrf), type, &exist);
if (!rnh)
return;
orig_flags = rnh->flags;
if (type == RNH_NEXTHOP_TYPE) {
if (flags
&& !CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
SET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
else if (!flags
&& CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED))
UNSET_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED);
} else if (type == RNH_IMPORT_CHECK_TYPE) {
if (flags
&& !CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH))
SET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
else if (!flags
&& CHECK_FLAG(rnh->flags,
ZEBRA_NHT_EXACT_MATCH))
UNSET_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH);
}
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, type,
&p);
zebra_add_rnh_client(rnh, client, type, 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;
uint16_t type = cmd2type[hdr->command];
if (IS_ZEBRA_DEBUG_NHT)
zlog_debug(
"rnh_unregister msg from client %s: hdr->length=%d vrf: %u\n",
zebra_route_string(client->proto), hdr->length,
zvrf->vrf->vrf_id);
s = msg;
while (l < hdr->length) {
uint8_t flags;
STREAM_GETC(s, flags);
if (flags != 0)
goto stream_failure;
STREAM_GETW(s, p.family);
STREAM_GETC(s, p.prefixlen);
l += 4;
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",
__PRETTY_FUNCTION__, 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",
__PRETTY_FUNCTION__, 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\n",
p.family);
return;
}
rnh = zebra_lookup_rnh(&p, zvrf_id(zvrf), type);
if (rnh) {
client->nh_dereg_time = monotime(NULL);
zebra_remove_rnh_client(rnh, client, type);
}
}
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 = vrf_info_lookup(VRF_DEFAULT);
if (!zvrf)
return;
/*
* 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\n",
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",
__PRETTY_FUNCTION__, 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 = vrf_info_lookup(VRF_DEFAULT);
if (!zvrf)
return;
/*
* 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\n",
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",
__PRETTY_FUNCTION__, 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;
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;
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_info("Setting interface %s (%u): protodown %s", ifp->name,
ifindex, down ? "on" : "off");
zebra_if_set_protodown(ifp, down);
} else {
zlog_warn(
"Cannot set protodown %s for interface %u; does not exist",
down ? "on" : "off", ifindex);
}
stream_failure:
return;
}
void 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];
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, buff, nexthop_num, zrouter.multipath_num);
}
}
static void zread_route_add(ZAPI_HANDLER_ARGS)
{
struct stream *s;
struct zapi_route api;
struct zapi_nexthop *api_nh;
afi_t afi;
struct prefix_ipv6 *src_p = NULL;
struct route_entry *re;
struct nexthop *nexthop = NULL;
int i, ret;
vrf_id_t vrf_id = 0;
struct ipaddr vtep_ip;
s = msg;
if (zapi_route_decode(s, &api) < 0) {
if (IS_ZEBRA_DEBUG_RECV)
zlog_debug("%s: Unable to decode zapi_route sent",
__PRETTY_FUNCTION__);
return;
}
if (IS_ZEBRA_DEBUG_RECV) {
char buf_prefix[PREFIX_STRLEN];
prefix2str(&api.prefix, buf_prefix, sizeof(buf_prefix));
zlog_debug("%s: p=%s, ZAPI_MESSAGE_LABEL: %sset, flags=0x%x",
__func__, buf_prefix,
(CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL) ? ""
: "un"),
api.flags);
}
/* Allocate new route. */
vrf_id = zvrf_id(zvrf);
re = XCALLOC(MTYPE_RE, sizeof(struct route_entry));
re->type = api.type;
re->instance = api.instance;
re->flags = api.flags;
re->uptime = monotime(NULL);
re->vrf_id = vrf_id;
re->ng = nexthop_group_new();
if (api.tableid)
re->table = api.tableid;
else
re->table = zvrf->table_id;
if (!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));
nexthop_group_delete(&re->ng);
XFREE(MTYPE_RE, re);
return;
}
/*
* 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 < api.nexthop_num; i++) {
api_nh = &api.nexthops[i];
ifindex_t ifindex = 0;
if (IS_ZEBRA_DEBUG_RECV)
zlog_debug("nh type %d", api_nh->type);
switch (api_nh->type) {
case NEXTHOP_TYPE_IFINDEX:
nexthop = route_entry_nexthop_ifindex_add(
re, api_nh->ifindex, api_nh->vrf_id);
break;
case NEXTHOP_TYPE_IPV4:
if (IS_ZEBRA_DEBUG_RECV) {
char nhbuf[INET6_ADDRSTRLEN] = {0};
inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
INET6_ADDRSTRLEN);
zlog_debug("%s: nh=%s, vrf_id=%d", __func__,
nhbuf, api_nh->vrf_id);
}
nexthop = route_entry_nexthop_ipv4_add(
re, &api_nh->gate.ipv4, NULL, api_nh->vrf_id);
break;
case NEXTHOP_TYPE_IPV4_IFINDEX:
memset(&vtep_ip, 0, sizeof(struct ipaddr));
ifindex = api_nh->ifindex;
if (IS_ZEBRA_DEBUG_RECV) {
char nhbuf[INET6_ADDRSTRLEN] = {0};
inet_ntop(AF_INET, &api_nh->gate.ipv4, nhbuf,
INET6_ADDRSTRLEN);
zlog_debug(
"%s: nh=%s, vrf_id=%d (re->vrf_id=%d), ifindex=%d",
__func__, nhbuf, api_nh->vrf_id,
re->vrf_id, ifindex);
}
nexthop = route_entry_nexthop_ipv4_ifindex_add(
re, &api_nh->gate.ipv4, NULL, 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.flags, ZEBRA_FLAG_EVPN_ROUTE)) {
vtep_ip.ipa_type = IPADDR_V4;
memcpy(&(vtep_ip.ipaddr_v4),
&(api_nh->gate.ipv4),
sizeof(struct in_addr));
zebra_vxlan_evpn_vrf_route_add(
api_nh->vrf_id, &api_nh->rmac,
&vtep_ip, &api.prefix);
}
break;
case NEXTHOP_TYPE_IPV6:
nexthop = route_entry_nexthop_ipv6_add(
re, &api_nh->gate.ipv6, api_nh->vrf_id);
break;
case NEXTHOP_TYPE_IPV6_IFINDEX:
memset(&vtep_ip, 0, sizeof(struct ipaddr));
ifindex = api_nh->ifindex;
nexthop = route_entry_nexthop_ipv6_ifindex_add(
re, &api_nh->gate.ipv6, 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.flags, ZEBRA_FLAG_EVPN_ROUTE)) {
vtep_ip.ipa_type = IPADDR_V6;
memcpy(&vtep_ip.ipaddr_v6, &(api_nh->gate.ipv6),
sizeof(struct in6_addr));
zebra_vxlan_evpn_vrf_route_add(
api_nh->vrf_id, &api_nh->rmac,
&vtep_ip, &api.prefix);
}
break;
case NEXTHOP_TYPE_BLACKHOLE:
nexthop = route_entry_nexthop_blackhole_add(
re, api_nh->bh_type);
break;
}
if (!nexthop) {
flog_warn(
EC_ZEBRA_NEXTHOP_CREATION_FAILED,
"%s: Nexthops Specified: %d but we failed to properly create one",
__PRETTY_FUNCTION__, api.nexthop_num);
nexthops_free(re->ng->nexthop);
nexthop_group_delete(&re->ng);
XFREE(MTYPE_RE, re);
return;
}
if (api_nh->onlink)
SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK);
/* MPLS labels for BGP-LU or Segment Routing */
if (CHECK_FLAG(api.message, ZAPI_MESSAGE_LABEL)
&& api_nh->type != NEXTHOP_TYPE_IFINDEX
&& api_nh->type != NEXTHOP_TYPE_BLACKHOLE) {
enum lsp_types_t label_type;
label_type = lsp_type_from_re_type(client->proto);
if (IS_ZEBRA_DEBUG_RECV) {
zlog_debug(
"%s: adding %d labels of type %d (1st=%u)",
__func__, api_nh->label_num, label_type,
api_nh->labels[0]);
}
nexthop_add_labels(nexthop, label_type,
api_nh->label_num,
&api_nh->labels[0]);
}
}
if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE))
re->distance = api.distance;
if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC))
re->metric = api.metric;
if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG))
re->tag = api.tag;
if (CHECK_FLAG(api.message, ZAPI_MESSAGE_MTU))
re->mtu = api.mtu;
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",
__PRETTY_FUNCTION__);
nexthops_free(re->ng->nexthop);
nexthop_group_delete(&re->ng);
XFREE(MTYPE_RE, re);
return;
}
if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
src_p = &api.src_prefix;
ret = rib_add_multipath(afi, api.safi, &api.prefix, src_p, re);
/* Stats */
switch (api.prefix.family) {
case AF_INET:
if (ret > 0)
client->v4_route_add_cnt++;
else if (ret < 0)
client->v4_route_upd8_cnt++;
break;
case AF_INET6:
if (ret > 0)
client->v6_route_add_cnt++;
else if (ret < 0)
client->v6_route_upd8_cnt++;
break;
}
}
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",
__PRETTY_FUNCTION__);
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;
rib_delete(afi, api.safi, zvrf_id(zvrf), api.type, api.instance,
api.flags, &api.prefix, src_p, NULL, 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_ipv4_nexthop_lookup_mrib(ZAPI_HANDLER_ARGS)
{
struct in_addr addr;
struct route_entry *re;
STREAM_GET(&addr.s_addr, msg, IPV4_MAX_BYTELEN);
re = rib_match_ipv4_multicast(zvrf_id(zvrf), addr, NULL);
zsend_ipv4_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)
{
struct prefix p;
/* Router-id information is needed. */
vrf_bitmap_set(client->ridinfo, zvrf_id(zvrf));
router_id_get(&p, zvrf_id(zvrf));
zsend_router_id_update(client, &p, zvrf_id(zvrf));
}
/* Unregister zebra server router-id information. */
static void zread_router_id_delete(ZAPI_HANDLER_ARGS)
{
vrf_bitmap_unset(client->ridinfo, zvrf_id(zvrf));
}
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_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 = vrf_info_lookup(VRF_DEFAULT);
for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
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;
STREAM_GETC(msg, proto);
STREAM_GETW(msg, instance);
STREAM_GETC(msg, notify);
if (notify)
client->notify_owner = 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;
}
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, zvrf_id(zvrf));
}
/*
* 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",
__PRETTY_FUNCTION__);
return;
}
if (!mpls_enabled)
return;
for (int i = 0; i < zl.nexthop_num; i++) {
struct zapi_nexthop_label *znh;
znh = &zl.nexthops[i];
mpls_lsp_install(zvrf, zl.type, zl.local_label, znh->label,
znh->type, &znh->address, znh->ifindex);
if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN))
mpls_ftn_update(1, zvrf, zl.type, &zl.route.prefix,
znh->type, &znh->address, znh->ifindex,
zl.route.type, zl.route.instance,
znh->label);
}
}
/*
* 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",
__PRETTY_FUNCTION__);
return;
}
if (!mpls_enabled)
return;
if (zl.nexthop_num > 0) {
for (int i = 0; i < zl.nexthop_num; i++) {
struct zapi_nexthop_label *znh;
znh = &zl.nexthops[i];
mpls_lsp_uninstall(zvrf, zl.type, zl.local_label,
znh->type, &znh->address,
znh->ifindex);
if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN))
mpls_ftn_update(0, zvrf, zl.type,
&zl.route.prefix, znh->type,
&znh->address, znh->ifindex,
zl.route.type,
zl.route.instance, znh->label);
}
} 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",
__PRETTY_FUNCTION__);
return;
}
if (!mpls_enabled)
return;
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);
for (int i = 0; i < zl.nexthop_num; i++) {
struct zapi_nexthop_label *znh;
znh = &zl.nexthops[i];
mpls_lsp_install(zvrf, zl.type, zl.local_label, znh->label,
znh->type, &znh->address, znh->ifindex);
if (CHECK_FLAG(zl.message, ZAPI_LABELS_FTN)) {
mpls_ftn_update(1, zvrf, zl.type, &zl.route.prefix,
znh->type, &znh->address, znh->ifindex,
zl.route.type, zl.route.instance,
znh->label);
}
}
}
/* 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;
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 %u instance %u connected as %s",
client->sock, 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(proto, instance, 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);
/* call hook to get a chunk using wrapper */
lm_get_chunk_call(&lmc, proto, instance, keep, size, base, vrf_id);
if (!lmc)
flog_err(
EC_ZEBRA_LM_CANNOT_ASSIGN_CHUNK,
"Unable to assign Label Chunk of size %u to %s instance %u",
size, zebra_route_string(proto), instance);
else
if (IS_ZEBRA_DEBUG_PACKET)
zlog_debug("Assigned Label Chunk %u - %u to %s instance %u",
lmc->start, lmc->end,
zebra_route_string(proto), instance);
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);
/* call hook to release a chunk using wrapper */
lm_release_chunk_call(proto, instance, 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,
vrf_id_t vrf_id)
{
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);
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, vrf_id, tmc);
stream_failure:
return;
}
static void zread_release_table_chunk(struct zserv *client, struct stream *msg)
{
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);
stream_failure:
return;
}
static void zread_table_manager_request(ZAPI_HANDLER_ARGS)
{
/* to avoid sending other messages like ZERBA_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 table request from an unidentified client");
return;
}
if (hdr->command == ZEBRA_GET_TABLE_CHUNK)
zread_get_table_chunk(client, msg, zvrf_id(zvrf));
else if (hdr->command == ZEBRA_RELEASE_TABLE_CHUNK)
zread_release_table_chunk(client, msg);
}
}
static void zread_pseudowire(ZAPI_HANDLER_ARGS)
{
struct stream *s;
char ifname[IF_NAMESIZE];
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, IF_NAMESIZE);
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 (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);
}
if (nlabel != MPLS_LABEL_NONE)
mpls_lsp_install(def_zvrf, ltype, nlabel,
MPLS_LABEL_IMPLICIT_NULL, NEXTHOP_TYPE_IFINDEX,
NULL, ifp->ifindex);
zvrf->label[afi] = nlabel;
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;
STREAM_GETL(s, zpr.rule.seq);
STREAM_GETL(s, zpr.rule.priority);
STREAM_GETL(s, zpr.rule.unique);
STREAM_GETC(s, zpr.rule.filter.src_ip.family);
STREAM_GETC(s, zpr.rule.filter.src_ip.prefixlen);
STREAM_GET(&zpr.rule.filter.src_ip.u.prefix, s,
prefix_blen(&zpr.rule.filter.src_ip));
STREAM_GETW(s, zpr.rule.filter.src_port);
STREAM_GETC(s, zpr.rule.filter.dst_ip.family);
STREAM_GETC(s, zpr.rule.filter.dst_ip.prefixlen);
STREAM_GET(&zpr.rule.filter.dst_ip.u.prefix, s,
prefix_blen(&zpr.rule.filter.dst_ip));
STREAM_GETW(s, zpr.rule.filter.dst_port);
STREAM_GETL(s, zpr.rule.filter.fwmark);
STREAM_GETL(s, zpr.rule.action.table);
STREAM_GETL(s, zpr.rule.ifindex);
if (zpr.rule.ifindex) {
struct interface *ifp;
ifp = if_lookup_by_index_per_ns(zvrf->zns,
zpr.rule.ifindex);
if (!ifp) {
zlog_debug("Failed to lookup ifindex: %u",
zpr.rule.ifindex);
return;
}
strlcpy(zpr.ifname, ifp->name, sizeof(zpr.ifname));
}
if (!is_default_prefix(&zpr.rule.filter.src_ip))
zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_IP;
if (!is_default_prefix(&zpr.rule.filter.dst_ip))
zpr.rule.filter.filter_bm |= PBR_FILTER_DST_IP;
if (zpr.rule.filter.src_port)
zpr.rule.filter.filter_bm |= PBR_FILTER_SRC_PORT;
if (zpr.rule.filter.dst_port)
zpr.rule.filter.filter_bm |= PBR_FILTER_DST_PORT;
if (zpr.rule.filter.fwmark)
zpr.rule.filter.filter_bm |= PBR_FILTER_FWMARK;
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_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_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);
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_PROTO;
/* calculate backpointer */
zpi.backpointer =
zebra_pbr_lookup_ipset_pername(ipset.ipset_name);
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 zread_iptable(ZAPI_HANDLER_ARGS)
{
struct zebra_pbr_iptable zpi;
struct stream *s;
s = msg;
memset(&zpi, 0, sizeof(zpi));
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_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_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:
return;
}
void (*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_IPV4_NEXTHOP_LOOKUP_MRIB] = zread_ipv4_nexthop_lookup_mrib,
[ZEBRA_HELLO] = zread_hello,
[ZEBRA_NEXTHOP_REGISTER] = zread_rnh_register,
[ZEBRA_NEXTHOP_UNREGISTER] = zread_rnh_unregister,
[ZEBRA_IMPORT_ROUTE_REGISTER] = zread_rnh_register,
[ZEBRA_IMPORT_ROUTE_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,
#if defined(HAVE_RTADV)
[ZEBRA_INTERFACE_ENABLE_RADV] = zebra_interface_radv_enable,
[ZEBRA_INTERFACE_DISABLE_RADV] = zebra_interface_radv_disable,
#else
[ZEBRA_INTERFACE_ENABLE_RADV] = NULL,
[ZEBRA_INTERFACE_DISABLE_RADV] = NULL,
#endif
[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_VTEP_ADD] = zebra_vxlan_remote_vtep_add,
[ZEBRA_REMOTE_VTEP_DEL] = zebra_vxlan_remote_vtep_del,
[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,
};
#if defined(HANDLE_ZAPI_FUZZING)
extern struct zebra_privs_t zserv_privs;
static void zserv_write_incoming(struct stream *orig, uint16_t command)
{
char fname[MAXPATHLEN];
struct stream *copy;
int fd = -1;
copy = stream_dup(orig);
stream_set_getp(copy, 0);
snprintf(fname, MAXPATHLEN, "%s/%u", frr_vtydir, command);
frr_with_privs(&zserv_privs) {
fd = open(fname, O_CREAT | O_WRONLY | O_EXCL, 0644);
}
stream_flush(copy, fd);
close(fd);
stream_free(copy);
}
#endif
void zserv_handle_commands(struct zserv *client, struct stream *msg)
{
struct zmsghdr hdr;
struct zebra_vrf *zvrf;
zapi_parse_header(msg, &hdr);
if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
zserv_log_message(NULL, msg, &hdr);
#if defined(HANDLE_ZAPI_FUZZING)
zserv_write_incoming(msg, hdr.command);
#endif
hdr.length -= ZEBRA_HEADER_SIZE;
/* lookup vrf */
zvrf = zebra_vrf_lookup_by_id(hdr.vrf_id);
if (!zvrf) {
if (IS_ZEBRA_DEBUG_PACKET && IS_ZEBRA_DEBUG_RECV)
zlog_debug("ZAPI message specifies unknown VRF: %d",
hdr.vrf_id);
return;
}
if (hdr.command >= array_size(zserv_handlers)
|| zserv_handlers[hdr.command] == NULL)
zlog_info("Zebra received unknown command %d", hdr.command);
else
zserv_handlers[hdr.command](client, &hdr, msg, zvrf);
}
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