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mirror_frr/lib/zclient.c
Quentin Young 6a597223d3 Revert "Merge pull request #4885 from satheeshkarra/pim_mlag" 
This reverts commit d563896dad, reversing
changes made to 09ea1a4038.
2019-10-14 17:15:09 +00:00

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/* Zebra's client library.
* Copyright (C) 1999 Kunihiro Ishiguro
* Copyright (C) 2005 Andrew J. Schorr
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2, or (at your
* option) any later version.
*
* GNU Zebra 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 "prefix.h"
#include "stream.h"
#include "buffer.h"
#include "network.h"
#include "vrf.h"
#include "vrf_int.h"
#include "if.h"
#include "log.h"
#include "thread.h"
#include "zclient.h"
#include "memory.h"
#include "table.h"
#include "nexthop.h"
#include "mpls.h"
#include "sockopt.h"
#include "pbr.h"
#include "nexthop_group.h"
#include "lib_errors.h"
DEFINE_MTYPE_STATIC(LIB, ZCLIENT, "Zclient")
DEFINE_MTYPE_STATIC(LIB, REDIST_INST, "Redistribution instance IDs")
/* Zebra client events. */
enum event { ZCLIENT_SCHEDULE, ZCLIENT_READ, ZCLIENT_CONNECT };
/* Prototype for event manager. */
static void zclient_event(enum event, struct zclient *);
static void zebra_interface_if_set_value(struct stream *s,
struct interface *ifp);
struct zclient_options zclient_options_default = {.receive_notify = false};
struct sockaddr_storage zclient_addr;
socklen_t zclient_addr_len;
/* This file local debug flag. */
static int zclient_debug;
/* Allocate zclient structure. */
struct zclient *zclient_new(struct thread_master *master,
struct zclient_options *opt)
{
struct zclient *zclient;
size_t stream_size =
MAX(ZEBRA_MAX_PACKET_SIZ, sizeof(struct zapi_route));
zclient = XCALLOC(MTYPE_ZCLIENT, sizeof(struct zclient));
zclient->ibuf = stream_new(stream_size);
zclient->obuf = stream_new(stream_size);
zclient->wb = buffer_new(0);
zclient->master = master;
zclient->receive_notify = opt->receive_notify;
return zclient;
}
/* This function is only called when exiting, because
many parts of the code do not check for I/O errors, so they could
reference an invalid pointer if the structure was ever freed.
Free zclient structure. */
void zclient_free(struct zclient *zclient)
{
if (zclient->ibuf)
stream_free(zclient->ibuf);
if (zclient->obuf)
stream_free(zclient->obuf);
if (zclient->wb)
buffer_free(zclient->wb);
XFREE(MTYPE_ZCLIENT, zclient);
}
unsigned short *redist_check_instance(struct redist_proto *red,
unsigned short instance)
{
struct listnode *node;
unsigned short *id;
if (!red->instances)
return NULL;
for (ALL_LIST_ELEMENTS_RO(red->instances, node, id))
if (*id == instance)
return id;
return NULL;
}
void redist_add_instance(struct redist_proto *red, unsigned short instance)
{
unsigned short *in;
red->enabled = 1;
if (!red->instances)
red->instances = list_new();
in = XMALLOC(MTYPE_REDIST_INST, sizeof(unsigned short));
*in = instance;
listnode_add(red->instances, in);
}
void redist_del_instance(struct redist_proto *red, unsigned short instance)
{
unsigned short *id;
id = redist_check_instance(red, instance);
if (!id)
return;
listnode_delete(red->instances, id);
XFREE(MTYPE_REDIST_INST, id);
if (!red->instances->count) {
red->enabled = 0;
list_delete(&red->instances);
}
}
/* Stop zebra client services. */
void zclient_stop(struct zclient *zclient)
{
afi_t afi;
int i;
if (zclient_debug)
zlog_debug("zclient stopped");
/* Stop threads. */
THREAD_OFF(zclient->t_read);
THREAD_OFF(zclient->t_connect);
THREAD_OFF(zclient->t_write);
/* Reset streams. */
stream_reset(zclient->ibuf);
stream_reset(zclient->obuf);
/* Empty the write buffer. */
buffer_reset(zclient->wb);
/* Close socket. */
if (zclient->sock >= 0) {
close(zclient->sock);
zclient->sock = -1;
}
zclient->fail = 0;
for (afi = AFI_IP; afi < AFI_MAX; afi++) {
for (i = 0; i < ZEBRA_ROUTE_MAX; i++) {
vrf_bitmap_free(zclient->redist[afi][i]);
zclient->redist[afi][i] = VRF_BITMAP_NULL;
}
redist_del_instance(
&zclient->mi_redist[afi][zclient->redist_default],
zclient->instance);
vrf_bitmap_free(zclient->default_information[afi]);
zclient->default_information[afi] = VRF_BITMAP_NULL;
}
}
void zclient_reset(struct zclient *zclient)
{
afi_t afi;
zclient_stop(zclient);
for (afi = AFI_IP; afi < AFI_MAX; afi++)
redist_del_instance(
&zclient->mi_redist[afi][zclient->redist_default],
zclient->instance);
zclient_init(zclient, zclient->redist_default, zclient->instance,
zclient->privs);
}
/**
* Connect to zebra daemon.
* @param zclient a pointer to zclient structure
* @return socket fd just to make sure that connection established
* @see zclient_init
* @see zclient_new
*/
int zclient_socket_connect(struct zclient *zclient)
{
int sock;
int ret;
/* We should think about IPv6 connection. */
sock = socket(zclient_addr.ss_family, SOCK_STREAM, 0);
if (sock < 0)
return -1;
set_cloexec(sock);
setsockopt_so_sendbuf(sock, 1048576);
/* Connect to zebra. */
ret = connect(sock, (struct sockaddr *)&zclient_addr, zclient_addr_len);
if (ret < 0) {
if (zclient_debug)
zlog_debug("%s connect failure: %d(%s)",
__PRETTY_FUNCTION__, errno,
safe_strerror(errno));
close(sock);
return -1;
}
zclient->sock = sock;
return sock;
}
static int zclient_failed(struct zclient *zclient)
{
zclient->fail++;
zclient_stop(zclient);
zclient_event(ZCLIENT_CONNECT, zclient);
return -1;
}
static int zclient_flush_data(struct thread *thread)
{
struct zclient *zclient = THREAD_ARG(thread);
zclient->t_write = NULL;
if (zclient->sock < 0)
return -1;
switch (buffer_flush_available(zclient->wb, zclient->sock)) {
case BUFFER_ERROR:
flog_err(
EC_LIB_ZAPI_SOCKET,
"%s: buffer_flush_available failed on zclient fd %d, closing",
__func__, zclient->sock);
return zclient_failed(zclient);
break;
case BUFFER_PENDING:
zclient->t_write = NULL;
thread_add_write(zclient->master, zclient_flush_data, zclient,
zclient->sock, &zclient->t_write);
break;
case BUFFER_EMPTY:
break;
}
return 0;
}
int zclient_send_message(struct zclient *zclient)
{
if (zclient->sock < 0)
return -1;
switch (buffer_write(zclient->wb, zclient->sock,
STREAM_DATA(zclient->obuf),
stream_get_endp(zclient->obuf))) {
case BUFFER_ERROR:
flog_err(EC_LIB_ZAPI_SOCKET,
"%s: buffer_write failed to zclient fd %d, closing",
__func__, zclient->sock);
return zclient_failed(zclient);
break;
case BUFFER_EMPTY:
THREAD_OFF(zclient->t_write);
break;
case BUFFER_PENDING:
thread_add_write(zclient->master, zclient_flush_data, zclient,
zclient->sock, &zclient->t_write);
break;
}
return 0;
}
void zclient_create_header(struct stream *s, uint16_t command, vrf_id_t vrf_id)
{
/* length placeholder, caller can update */
stream_putw(s, ZEBRA_HEADER_SIZE);
stream_putc(s, ZEBRA_HEADER_MARKER);
stream_putc(s, ZSERV_VERSION);
stream_putl(s, vrf_id);
stream_putw(s, command);
}
int zclient_read_header(struct stream *s, int sock, uint16_t *size,
uint8_t *marker, uint8_t *version, vrf_id_t *vrf_id,
uint16_t *cmd)
{
if (stream_read(s, sock, ZEBRA_HEADER_SIZE) != ZEBRA_HEADER_SIZE)
return -1;
STREAM_GETW(s, *size);
*size -= ZEBRA_HEADER_SIZE;
STREAM_GETC(s, *marker);
STREAM_GETC(s, *version);
STREAM_GETL(s, *vrf_id);
STREAM_GETW(s, *cmd);
if (*version != ZSERV_VERSION || *marker != ZEBRA_HEADER_MARKER) {
flog_err(
EC_LIB_ZAPI_MISSMATCH,
"%s: socket %d version mismatch, marker %d, version %d",
__func__, sock, *marker, *version);
return -1;
}
if (*size && stream_read(s, sock, *size) != *size)
return -1;
return 0;
stream_failure:
return -1;
}
bool zapi_parse_header(struct stream *zmsg, struct zmsghdr *hdr)
{
STREAM_GETW(zmsg, hdr->length);
STREAM_GETC(zmsg, hdr->marker);
STREAM_GETC(zmsg, hdr->version);
STREAM_GETL(zmsg, hdr->vrf_id);
STREAM_GETW(zmsg, hdr->command);
return true;
stream_failure:
return false;
}
/* Send simple Zebra message. */
static int zebra_message_send(struct zclient *zclient, int command,
vrf_id_t vrf_id)
{
struct stream *s;
/* Get zclient output buffer. */
s = zclient->obuf;
stream_reset(s);
/* Send very simple command only Zebra message. */
zclient_create_header(s, command, vrf_id);
return zclient_send_message(zclient);
}
static int zebra_hello_send(struct zclient *zclient)
{
struct stream *s;
if (zclient->redist_default) {
s = zclient->obuf;
stream_reset(s);
/* The VRF ID in the HELLO message is always 0. */
zclient_create_header(s, ZEBRA_HELLO, VRF_DEFAULT);
stream_putc(s, zclient->redist_default);
stream_putw(s, zclient->instance);
if (zclient->receive_notify)
stream_putc(s, 1);
else
stream_putc(s, 0);
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
return 0;
}
void zclient_send_vrf_label(struct zclient *zclient, vrf_id_t vrf_id, afi_t afi,
mpls_label_t label, enum lsp_types_t ltype)
{
struct stream *s;
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_VRF_LABEL, vrf_id);
stream_putl(s, label);
stream_putc(s, afi);
stream_putc(s, ltype);
stream_putw_at(s, 0, stream_get_endp(s));
zclient_send_message(zclient);
}
/* Send register requests to zebra daemon for the information in a VRF. */
void zclient_send_reg_requests(struct zclient *zclient, vrf_id_t vrf_id)
{
int i;
afi_t afi;
/* If not connected to the zebra yet. */
if (zclient->sock < 0)
return;
if (zclient_debug)
zlog_debug("%s: send register messages for VRF %u", __func__,
vrf_id);
/* We need router-id information. */
zebra_message_send(zclient, ZEBRA_ROUTER_ID_ADD, vrf_id);
/* We need interface information. */
zebra_message_send(zclient, ZEBRA_INTERFACE_ADD, vrf_id);
/* Set unwanted redistribute route. */
for (afi = AFI_IP; afi < AFI_MAX; afi++)
vrf_bitmap_set(zclient->redist[afi][zclient->redist_default],
vrf_id);
/* Flush all redistribute request. */
if (vrf_id == VRF_DEFAULT) {
for (afi = AFI_IP; afi < AFI_MAX; afi++) {
for (i = 0; i < ZEBRA_ROUTE_MAX; i++) {
if (!zclient->mi_redist[afi][i].enabled)
continue;
struct listnode *node;
unsigned short *id;
for (ALL_LIST_ELEMENTS_RO(
zclient->mi_redist[afi][i]
.instances,
node, id))
if (!(i == zclient->redist_default
&& *id == zclient->instance))
zebra_redistribute_send(
ZEBRA_REDISTRIBUTE_ADD,
zclient, afi, i, *id,
VRF_DEFAULT);
}
}
}
/* Resend all redistribute request. */
for (afi = AFI_IP; afi < AFI_MAX; afi++) {
for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
if (i != zclient->redist_default
&& vrf_bitmap_check(zclient->redist[afi][i],
vrf_id))
zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD,
zclient, afi, i, 0,
vrf_id);
/* If default information is needed. */
if (vrf_bitmap_check(zclient->default_information[afi], vrf_id))
zebra_redistribute_default_send(
ZEBRA_REDISTRIBUTE_DEFAULT_ADD, zclient, afi,
vrf_id);
}
}
/* Send unregister requests to zebra daemon for the information in a VRF. */
void zclient_send_dereg_requests(struct zclient *zclient, vrf_id_t vrf_id)
{
int i;
afi_t afi;
/* If not connected to the zebra yet. */
if (zclient->sock < 0)
return;
if (zclient_debug)
zlog_debug("%s: send deregister messages for VRF %u", __func__,
vrf_id);
/* We need router-id information. */
zebra_message_send(zclient, ZEBRA_ROUTER_ID_DELETE, vrf_id);
zebra_message_send(zclient, ZEBRA_INTERFACE_DELETE, vrf_id);
/* Set unwanted redistribute route. */
for (afi = AFI_IP; afi < AFI_MAX; afi++)
vrf_bitmap_unset(zclient->redist[afi][zclient->redist_default],
vrf_id);
/* Flush all redistribute request. */
if (vrf_id == VRF_DEFAULT) {
for (afi = AFI_IP; afi < AFI_MAX; afi++) {
for (i = 0; i < ZEBRA_ROUTE_MAX; i++) {
if (!zclient->mi_redist[afi][i].enabled)
continue;
struct listnode *node;
unsigned short *id;
for (ALL_LIST_ELEMENTS_RO(
zclient->mi_redist[afi][i]
.instances,
node, id))
if (!(i == zclient->redist_default
&& *id == zclient->instance))
zebra_redistribute_send(
ZEBRA_REDISTRIBUTE_DELETE,
zclient, afi, i, *id,
VRF_DEFAULT);
}
}
}
/* Flush all redistribute request. */
for (afi = AFI_IP; afi < AFI_MAX; afi++) {
for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
if (i != zclient->redist_default
&& vrf_bitmap_check(zclient->redist[afi][i],
vrf_id))
zebra_redistribute_send(
ZEBRA_REDISTRIBUTE_DELETE, zclient, afi,
i, 0, vrf_id);
/* If default information is needed. */
if (vrf_bitmap_check(zclient->default_information[afi], vrf_id))
zebra_redistribute_default_send(
ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, zclient, afi,
vrf_id);
}
}
/* Send request to zebra daemon to start or stop RA. */
void zclient_send_interface_radv_req(struct zclient *zclient, vrf_id_t vrf_id,
struct interface *ifp, int enable,
int ra_interval)
{
struct stream *s;
/* If not connected to the zebra yet. */
if (zclient->sock < 0)
return;
/* Form and send message. */
s = zclient->obuf;
stream_reset(s);
if (enable)
zclient_create_header(s, ZEBRA_INTERFACE_ENABLE_RADV, vrf_id);
else
zclient_create_header(s, ZEBRA_INTERFACE_DISABLE_RADV, vrf_id);
stream_putl(s, ifp->ifindex);
stream_putl(s, ra_interval);
stream_putw_at(s, 0, stream_get_endp(s));
zclient_send_message(zclient);
}
int zclient_send_interface_protodown(struct zclient *zclient, vrf_id_t vrf_id,
struct interface *ifp, bool down)
{
struct stream *s;
if (zclient->sock < 0)
return -1;
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_INTERFACE_SET_PROTODOWN, vrf_id);
stream_putl(s, ifp->ifindex);
stream_putc(s, !!down);
stream_putw_at(s, 0, stream_get_endp(s));
zclient_send_message(zclient);
return 0;
}
/* Make connection to zebra daemon. */
int zclient_start(struct zclient *zclient)
{
if (zclient_debug)
zlog_info("zclient_start is called");
/* If already connected to the zebra. */
if (zclient->sock >= 0)
return 0;
/* Check connect thread. */
if (zclient->t_connect)
return 0;
if (zclient_socket_connect(zclient) < 0) {
if (zclient_debug)
zlog_debug("zclient connection fail");
zclient->fail++;
zclient_event(ZCLIENT_CONNECT, zclient);
return -1;
}
if (set_nonblocking(zclient->sock) < 0)
flog_err(EC_LIB_ZAPI_SOCKET, "%s: set_nonblocking(%d) failed",
__func__, zclient->sock);
/* Clear fail count. */
zclient->fail = 0;
if (zclient_debug)
zlog_debug("zclient connect success with socket [%d]",
zclient->sock);
/* Create read thread. */
zclient_event(ZCLIENT_READ, zclient);
zebra_hello_send(zclient);
zebra_message_send(zclient, ZEBRA_INTERFACE_ADD, VRF_DEFAULT);
/* Inform the successful connection. */
if (zclient->zebra_connected)
(*zclient->zebra_connected)(zclient);
return 0;
}
/* Initialize zebra client. Argument redist_default is unwanted
redistribute route type. */
void zclient_init(struct zclient *zclient, int redist_default,
unsigned short instance, struct zebra_privs_t *privs)
{
int afi, i;
/* Set -1 to the default socket value. */
zclient->sock = -1;
zclient->privs = privs;
/* Clear redistribution flags. */
for (afi = AFI_IP; afi < AFI_MAX; afi++)
for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
zclient->redist[afi][i] = vrf_bitmap_init();
/* Set unwanted redistribute route. bgpd does not need BGP route
redistribution. */
zclient->redist_default = redist_default;
zclient->instance = instance;
/* Pending: make afi(s) an arg. */
for (afi = AFI_IP; afi < AFI_MAX; afi++) {
redist_add_instance(&zclient->mi_redist[afi][redist_default],
instance);
/* Set default-information redistribute to zero. */
zclient->default_information[afi] = vrf_bitmap_init();
}
if (zclient_debug)
zlog_debug("scheduling zclient connection");
zclient_event(ZCLIENT_SCHEDULE, zclient);
}
/* This function is a wrapper function for calling zclient_start from
timer or event thread. */
static int zclient_connect(struct thread *t)
{
struct zclient *zclient;
zclient = THREAD_ARG(t);
zclient->t_connect = NULL;
if (zclient_debug)
zlog_debug("zclient_connect is called");
return zclient_start(zclient);
}
int zclient_send_rnh(struct zclient *zclient, int command, struct prefix *p,
bool exact_match, vrf_id_t vrf_id)
{
struct stream *s;
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, command, vrf_id);
stream_putc(s, (exact_match) ? 1 : 0);
stream_putw(s, PREFIX_FAMILY(p));
stream_putc(s, p->prefixlen);
switch (PREFIX_FAMILY(p)) {
case AF_INET:
stream_put_in_addr(s, &p->u.prefix4);
break;
case AF_INET6:
stream_put(s, &(p->u.prefix6), 16);
break;
default:
break;
}
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
/*
* "xdr_encode"-like interface that allows daemon (client) to send
* a message to zebra server for a route that needs to be
* added/deleted to the kernel. Info about the route is specified
* by the caller in a struct zapi_route. zapi_route_encode() then writes
* the info down the zclient socket using the stream_* functions.
*
* The corresponding read ("xdr_decode") function on the server
* side is zapi_route_decode().
*
* 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 1 2 3 4 5 6 7 8 9 A B C D E F
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Length (2) | Command | Route Type |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | ZEBRA Flags | Message Flags | Prefix length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Destination IPv4 Prefix for route |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Nexthop count |
* +-+-+-+-+-+-+-+-+
*
*
* A number of IPv4 nexthop(s) or nexthop interface index(es) are then
* described, as per the Nexthop count. Each nexthop described as:
*
* +-+-+-+-+-+-+-+-+
* | Nexthop Type | Set to one of ZEBRA_NEXTHOP_*
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | IPv4 Nexthop address or Interface Index number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Alternatively, if the route is a blackhole route, then Nexthop count
* is set to 1 and a nexthop of type NEXTHOP_TYPE_BLACKHOLE is the sole
* nexthop.
*
* The original struct zapi_route_*() infrastructure was built around
* the traditional (32-bit "gate OR ifindex") nexthop data unit.
* A special encoding can be used to feed onlink (64-bit "gate AND ifindex")
* nexthops into zapi_route_encode() using the same zapi_route structure.
* This is done by setting zapi_route fields as follows:
* - .message |= ZAPI_MESSAGE_NEXTHOP | ZAPI_MESSAGE_ONLINK
* - .nexthop_num == .ifindex_num
* - .nexthop and .ifindex are filled with gate and ifindex parts of
* each compound nexthop, both in the same order
*
* If ZAPI_MESSAGE_DISTANCE is set, the distance value is written as a 1
* byte value.
*
* If ZAPI_MESSAGE_METRIC is set, the metric value is written as an 8
* byte value.
*
* If ZAPI_MESSAGE_TAG is set, the tag value is written as a 4 byte value
*
* If ZAPI_MESSAGE_MTU is set, the mtu value is written as a 4 byte value
*
* XXX: No attention paid to alignment.
*/
int zclient_route_send(uint8_t cmd, struct zclient *zclient,
struct zapi_route *api)
{
if (zapi_route_encode(cmd, zclient->obuf, api) < 0)
return -1;
return zclient_send_message(zclient);
}
static int zapi_nexthop_labels_cmp(const struct zapi_nexthop *next1,
const struct zapi_nexthop *next2)
{
if (next1->label_num > next2->label_num)
return 1;
if (next1->label_num < next2->label_num)
return -1;
return memcmp(next1->labels, next2->labels, next1->label_num);
}
static int zapi_nexthop_cmp_no_labels(const struct zapi_nexthop *next1,
const struct zapi_nexthop *next2)
{
int ret = 0;
if (next1->vrf_id < next2->vrf_id)
return -1;
if (next1->vrf_id > next2->vrf_id)
return 1;
if (next1->type < next2->type)
return -1;
if (next1->type > next2->type)
return 1;
switch (next1->type) {
case NEXTHOP_TYPE_IPV4:
case NEXTHOP_TYPE_IPV6:
ret = nexthop_g_addr_cmp(next1->type, &next1->gate,
&next2->gate);
if (ret != 0)
return ret;
break;
case NEXTHOP_TYPE_IPV4_IFINDEX:
case NEXTHOP_TYPE_IPV6_IFINDEX:
ret = nexthop_g_addr_cmp(next1->type, &next1->gate,
&next2->gate);
if (ret != 0)
return ret;
/* Intentional Fall-Through */
case NEXTHOP_TYPE_IFINDEX:
if (next1->ifindex < next2->ifindex)
return -1;
if (next1->ifindex > next2->ifindex)
return 1;
break;
case NEXTHOP_TYPE_BLACKHOLE:
if (next1->bh_type < next2->bh_type)
return -1;
if (next1->bh_type > next2->bh_type)
return 1;
break;
}
return 0;
}
static int zapi_nexthop_cmp(const void *item1, const void *item2)
{
int ret = 0;
const struct zapi_nexthop *next1 = item1;
const struct zapi_nexthop *next2 = item2;
ret = zapi_nexthop_cmp_no_labels(next1, next2);
if (ret != 0)
return ret;
ret = zapi_nexthop_labels_cmp(next1, next2);
return ret;
}
static void zapi_nexthop_group_sort(struct zapi_nexthop *nh_grp,
uint16_t nexthop_num)
{
qsort(nh_grp, nexthop_num, sizeof(struct zapi_nexthop),
&zapi_nexthop_cmp);
}
int zapi_route_encode(uint8_t cmd, struct stream *s, struct zapi_route *api)
{
struct zapi_nexthop *api_nh;
int i;
int psize;
stream_reset(s);
zclient_create_header(s, cmd, api->vrf_id);
if (api->type >= ZEBRA_ROUTE_MAX) {
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: Specified route type (%u) is not a legal value\n",
__PRETTY_FUNCTION__, api->type);
return -1;
}
stream_putc(s, api->type);
stream_putw(s, api->instance);
stream_putl(s, api->flags);
stream_putc(s, api->message);
if (api->safi < SAFI_UNICAST || api->safi >= SAFI_MAX) {
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: Specified route SAFI (%u) is not a legal value\n",
__PRETTY_FUNCTION__, api->safi);
return -1;
}
stream_putc(s, api->safi);
/* Put prefix information. */
stream_putc(s, api->prefix.family);
psize = PSIZE(api->prefix.prefixlen);
stream_putc(s, api->prefix.prefixlen);
stream_write(s, (uint8_t *)&api->prefix.u.prefix, psize);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) {
psize = PSIZE(api->src_prefix.prefixlen);
stream_putc(s, api->src_prefix.prefixlen);
stream_write(s, (uint8_t *)&api->src_prefix.prefix, psize);
}
/* Nexthops. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) {
/* limit the number of nexthops if necessary */
if (api->nexthop_num > MULTIPATH_NUM) {
char buf[PREFIX2STR_BUFFER];
prefix2str(&api->prefix, buf, sizeof(buf));
flog_err(
EC_LIB_ZAPI_ENCODE,
"%s: prefix %s: can't encode %u nexthops (maximum is %u)",
__func__, buf, api->nexthop_num, MULTIPATH_NUM);
return -1;
}
zapi_nexthop_group_sort(api->nexthops, api->nexthop_num);
stream_putw(s, api->nexthop_num);
for (i = 0; i < api->nexthop_num; i++) {
api_nh = &api->nexthops[i];
stream_putl(s, api_nh->vrf_id);
stream_putc(s, api_nh->type);
stream_putc(s, api_nh->onlink);
switch (api_nh->type) {
case NEXTHOP_TYPE_BLACKHOLE:
stream_putc(s, api_nh->bh_type);
break;
case NEXTHOP_TYPE_IPV4:
stream_put_in_addr(s, &api_nh->gate.ipv4);
break;
case NEXTHOP_TYPE_IPV4_IFINDEX:
stream_put_in_addr(s, &api_nh->gate.ipv4);
stream_putl(s, api_nh->ifindex);
break;
case NEXTHOP_TYPE_IFINDEX:
stream_putl(s, api_nh->ifindex);
break;
case NEXTHOP_TYPE_IPV6:
stream_write(s, (uint8_t *)&api_nh->gate.ipv6,
16);
break;
case NEXTHOP_TYPE_IPV6_IFINDEX:
stream_write(s, (uint8_t *)&api_nh->gate.ipv6,
16);
stream_putl(s, api_nh->ifindex);
break;
}
/* MPLS labels for BGP-LU or Segment Routing */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) {
if (api_nh->label_num > MPLS_MAX_LABELS) {
char buf[PREFIX2STR_BUFFER];
prefix2str(&api->prefix, buf,
sizeof(buf));
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: prefix %s: can't encode "
"%u labels (maximum is %u)",
__func__, buf,
api_nh->label_num,
MPLS_MAX_LABELS);
return -1;
}
stream_putc(s, api_nh->label_num);
stream_put(s, &api_nh->labels[0],
api_nh->label_num
* sizeof(mpls_label_t));
}
/* Router MAC for EVPN routes. */
if (CHECK_FLAG(api->flags, ZEBRA_FLAG_EVPN_ROUTE))
stream_put(s, &(api_nh->rmac),
sizeof(struct ethaddr));
}
}
/* Attributes. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE))
stream_putc(s, api->distance);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC))
stream_putl(s, api->metric);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG))
stream_putl(s, api->tag);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU))
stream_putl(s, api->mtu);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TABLEID))
stream_putl(s, api->tableid);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return 0;
}
int zapi_route_decode(struct stream *s, struct zapi_route *api)
{
struct zapi_nexthop *api_nh;
int i;
memset(api, 0, sizeof(*api));
/* Type, flags, message. */
STREAM_GETC(s, api->type);
if (api->type >= ZEBRA_ROUTE_MAX) {
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: Specified route type: %d is not a legal value\n",
__PRETTY_FUNCTION__, api->type);
return -1;
}
STREAM_GETW(s, api->instance);
STREAM_GETL(s, api->flags);
STREAM_GETC(s, api->message);
STREAM_GETC(s, api->safi);
if (api->safi < SAFI_UNICAST || api->safi >= SAFI_MAX) {
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: Specified route SAFI (%u) is not a legal value\n",
__PRETTY_FUNCTION__, api->safi);
return -1;
}
/* Prefix. */
STREAM_GETC(s, api->prefix.family);
STREAM_GETC(s, api->prefix.prefixlen);
switch (api->prefix.family) {
case AF_INET:
if (api->prefix.prefixlen > IPV4_MAX_PREFIXLEN) {
flog_err(
EC_LIB_ZAPI_ENCODE,
"%s: V4 prefixlen is %d which should not be more than 32",
__PRETTY_FUNCTION__, api->prefix.prefixlen);
return -1;
}
break;
case AF_INET6:
if (api->prefix.prefixlen > IPV6_MAX_PREFIXLEN) {
flog_err(
EC_LIB_ZAPI_ENCODE,
"%s: v6 prefixlen is %d which should not be more than 128",
__PRETTY_FUNCTION__, api->prefix.prefixlen);
return -1;
}
break;
default:
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: Specified family %d is not v4 or v6",
__PRETTY_FUNCTION__, api->prefix.family);
return -1;
}
STREAM_GET(&api->prefix.u.prefix, s, PSIZE(api->prefix.prefixlen));
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) {
api->src_prefix.family = AF_INET6;
STREAM_GETC(s, api->src_prefix.prefixlen);
if (api->src_prefix.prefixlen > IPV6_MAX_PREFIXLEN) {
flog_err(
EC_LIB_ZAPI_ENCODE,
"%s: SRC Prefix prefixlen received: %d is too large",
__PRETTY_FUNCTION__, api->src_prefix.prefixlen);
return -1;
}
STREAM_GET(&api->src_prefix.prefix, s,
PSIZE(api->src_prefix.prefixlen));
if (api->prefix.family != AF_INET6
|| api->src_prefix.prefixlen == 0) {
flog_err(
EC_LIB_ZAPI_ENCODE,
"%s: SRC prefix specified in some manner that makes no sense",
__PRETTY_FUNCTION__);
return -1;
}
}
/* Nexthops. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) {
STREAM_GETW(s, api->nexthop_num);
if (api->nexthop_num > MULTIPATH_NUM) {
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: invalid number of nexthops (%u)",
__func__, api->nexthop_num);
return -1;
}
for (i = 0; i < api->nexthop_num; i++) {
api_nh = &api->nexthops[i];
STREAM_GETL(s, api_nh->vrf_id);
STREAM_GETC(s, api_nh->type);
STREAM_GETC(s, api_nh->onlink);
switch (api_nh->type) {
case NEXTHOP_TYPE_BLACKHOLE:
STREAM_GETC(s, api_nh->bh_type);
break;
case NEXTHOP_TYPE_IPV4:
STREAM_GET(&api_nh->gate.ipv4.s_addr, s,
IPV4_MAX_BYTELEN);
break;
case NEXTHOP_TYPE_IPV4_IFINDEX:
STREAM_GET(&api_nh->gate.ipv4.s_addr, s,
IPV4_MAX_BYTELEN);
STREAM_GETL(s, api_nh->ifindex);
break;
case NEXTHOP_TYPE_IFINDEX:
STREAM_GETL(s, api_nh->ifindex);
break;
case NEXTHOP_TYPE_IPV6:
STREAM_GET(&api_nh->gate.ipv6, s, 16);
break;
case NEXTHOP_TYPE_IPV6_IFINDEX:
STREAM_GET(&api_nh->gate.ipv6, s, 16);
STREAM_GETL(s, api_nh->ifindex);
break;
}
/* MPLS labels for BGP-LU or Segment Routing */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)) {
STREAM_GETC(s, api_nh->label_num);
if (api_nh->label_num > MPLS_MAX_LABELS) {
flog_err(
EC_LIB_ZAPI_ENCODE,
"%s: invalid number of MPLS labels (%u)",
__func__, api_nh->label_num);
return -1;
}
STREAM_GET(&api_nh->labels[0], s,
api_nh->label_num
* sizeof(mpls_label_t));
}
/* Router MAC for EVPN routes. */
if (CHECK_FLAG(api->flags, ZEBRA_FLAG_EVPN_ROUTE))
stream_get(&(api_nh->rmac), s,
sizeof(struct ethaddr));
}
}
/* Attributes. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_DISTANCE))
STREAM_GETC(s, api->distance);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_METRIC))
STREAM_GETL(s, api->metric);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TAG))
STREAM_GETL(s, api->tag);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_MTU))
STREAM_GETL(s, api->mtu);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_TABLEID))
STREAM_GETL(s, api->tableid);
return 0;
stream_failure:
return -1;
}
static void zapi_encode_prefix(struct stream *s, struct prefix *p,
uint8_t family)
{
struct prefix any;
if (!p) {
memset(&any, 0, sizeof(any));
any.family = family;
p = &any;
}
stream_putc(s, p->family);
stream_putc(s, p->prefixlen);
stream_put(s, &p->u.prefix, prefix_blen(p));
}
int zapi_pbr_rule_encode(uint8_t cmd, struct stream *s, struct pbr_rule *zrule)
{
stream_reset(s);
zclient_create_header(s, cmd, zrule->vrf_id);
/*
* We are sending one item at a time at the moment
*/
stream_putl(s, 1);
stream_putl(s, zrule->seq);
stream_putl(s, zrule->priority);
stream_putl(s, zrule->unique);
zapi_encode_prefix(s, &(zrule->filter.src_ip),
zrule->filter.src_ip.family);
stream_putw(s, zrule->filter.src_port); /* src port */
zapi_encode_prefix(s, &(zrule->filter.dst_ip),
zrule->filter.src_ip.family);
stream_putw(s, zrule->filter.dst_port); /* dst port */
stream_putw(s, zrule->filter.fwmark); /* fwmark */
stream_putl(s, zrule->action.table);
stream_putl(s, zrule->ifindex);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return 0;
}
bool zapi_route_notify_decode(struct stream *s, struct prefix *p,
uint32_t *tableid,
enum zapi_route_notify_owner *note)
{
uint32_t t;
STREAM_GET(note, s, sizeof(*note));
STREAM_GETC(s, p->family);
STREAM_GETC(s, p->prefixlen);
STREAM_GET(&p->u.prefix, s, prefix_blen(p));
STREAM_GETL(s, t);
*tableid = t;
return true;
stream_failure:
return false;
}
bool zapi_rule_notify_decode(struct stream *s, uint32_t *seqno,
uint32_t *priority, uint32_t *unique,
ifindex_t *ifindex,
enum zapi_rule_notify_owner *note)
{
uint32_t prio, seq, uni;
ifindex_t ifi;
STREAM_GET(note, s, sizeof(*note));
STREAM_GETL(s, seq);
STREAM_GETL(s, prio);
STREAM_GETL(s, uni);
STREAM_GETL(s, ifi);
if (zclient_debug)
zlog_debug("%s: %u %u %u %u", __PRETTY_FUNCTION__, seq, prio,
uni, ifi);
*seqno = seq;
*priority = prio;
*unique = uni;
*ifindex = ifi;
return true;
stream_failure:
return false;
}
bool zapi_ipset_notify_decode(struct stream *s, uint32_t *unique,
enum zapi_ipset_notify_owner *note)
{
uint32_t uni;
STREAM_GET(note, s, sizeof(*note));
STREAM_GETL(s, uni);
if (zclient_debug)
zlog_debug("%s: %u", __PRETTY_FUNCTION__, uni);
*unique = uni;
return true;
stream_failure:
return false;
}
bool zapi_ipset_entry_notify_decode(struct stream *s, uint32_t *unique,
char *ipset_name,
enum zapi_ipset_entry_notify_owner *note)
{
uint32_t uni;
STREAM_GET(note, s, sizeof(*note));
STREAM_GETL(s, uni);
STREAM_GET(ipset_name, s, ZEBRA_IPSET_NAME_SIZE);
if (zclient_debug)
zlog_debug("%s: %u", __PRETTY_FUNCTION__, uni);
*unique = uni;
return true;
stream_failure:
return false;
}
bool zapi_iptable_notify_decode(struct stream *s,
uint32_t *unique,
enum zapi_iptable_notify_owner *note)
{
uint32_t uni;
STREAM_GET(note, s, sizeof(*note));
STREAM_GETL(s, uni);
if (zclient_debug)
zlog_debug("%s: %u", __PRETTY_FUNCTION__, uni);
*unique = uni;
return true;
stream_failure:
return false;
}
struct nexthop *nexthop_from_zapi_nexthop(struct zapi_nexthop *znh)
{
struct nexthop *n = nexthop_new();
n->type = znh->type;
n->vrf_id = znh->vrf_id;
n->ifindex = znh->ifindex;
n->gate = znh->gate;
/*
* This function currently handles labels
*/
if (znh->label_num) {
nexthop_add_labels(n, ZEBRA_LSP_NONE, znh->label_num,
znh->labels);
}
return n;
}
bool zapi_nexthop_update_decode(struct stream *s, struct zapi_route *nhr)
{
uint32_t i;
memset(nhr, 0, sizeof(*nhr));
STREAM_GETW(s, nhr->prefix.family);
STREAM_GETC(s, nhr->prefix.prefixlen);
switch (nhr->prefix.family) {
case AF_INET:
STREAM_GET(&nhr->prefix.u.prefix4.s_addr, s, IPV4_MAX_BYTELEN);
break;
case AF_INET6:
STREAM_GET(&nhr->prefix.u.prefix6, s, IPV6_MAX_BYTELEN);
break;
default:
break;
}
STREAM_GETC(s, nhr->type);
STREAM_GETW(s, nhr->instance);
STREAM_GETC(s, nhr->distance);
STREAM_GETL(s, nhr->metric);
STREAM_GETC(s, nhr->nexthop_num);
for (i = 0; i < nhr->nexthop_num; i++) {
STREAM_GETL(s, nhr->nexthops[i].vrf_id);
STREAM_GETC(s, nhr->nexthops[i].type);
switch (nhr->nexthops[i].type) {
case NEXTHOP_TYPE_IPV4:
case NEXTHOP_TYPE_IPV4_IFINDEX:
STREAM_GET(&nhr->nexthops[i].gate.ipv4.s_addr, s,
IPV4_MAX_BYTELEN);
STREAM_GETL(s, nhr->nexthops[i].ifindex);
break;
case NEXTHOP_TYPE_IFINDEX:
STREAM_GETL(s, nhr->nexthops[i].ifindex);
break;
case NEXTHOP_TYPE_IPV6:
case NEXTHOP_TYPE_IPV6_IFINDEX:
STREAM_GET(&nhr->nexthops[i].gate.ipv6, s,
IPV6_MAX_BYTELEN);
STREAM_GETL(s, nhr->nexthops[i].ifindex);
break;
case NEXTHOP_TYPE_BLACKHOLE:
break;
}
STREAM_GETC(s, nhr->nexthops[i].label_num);
if (nhr->nexthops[i].label_num > MPLS_MAX_LABELS) {
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: invalid number of MPLS labels (%u)",
__func__, nhr->nexthops[i].label_num);
return false;
}
if (nhr->nexthops[i].label_num)
STREAM_GET(&nhr->nexthops[i].labels[0], s,
nhr->nexthops[i].label_num
* sizeof(mpls_label_t));
}
return true;
stream_failure:
return false;
}
/*
* send a ZEBRA_REDISTRIBUTE_ADD or ZEBRA_REDISTRIBUTE_DELETE
* for the route type (ZEBRA_ROUTE_KERNEL etc.). The zebra server will
* then set/unset redist[type] in the client handle (a struct zserv) for the
* sending client
*/
int zebra_redistribute_send(int command, struct zclient *zclient, afi_t afi,
int type, unsigned short instance, vrf_id_t vrf_id)
{
struct stream *s;
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, command, vrf_id);
stream_putc(s, afi);
stream_putc(s, type);
stream_putw(s, instance);
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
int zebra_redistribute_default_send(int command, struct zclient *zclient,
afi_t afi, vrf_id_t vrf_id)
{
struct stream *s;
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, command, vrf_id);
stream_putc(s, afi);
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
/* Get prefix in ZServ format; family should be filled in on prefix */
static void zclient_stream_get_prefix(struct stream *s, struct prefix *p)
{
size_t plen = prefix_blen(p);
uint8_t c;
p->prefixlen = 0;
if (plen == 0)
return;
stream_get(&p->u.prefix, s, plen);
STREAM_GETC(s, c);
p->prefixlen = MIN(plen * 8, c);
stream_failure:
return;
}
/* Router-id update from zebra daemon. */
void zebra_router_id_update_read(struct stream *s, struct prefix *rid)
{
/* Fetch interface address. */
STREAM_GETC(s, rid->family);
zclient_stream_get_prefix(s, rid);
stream_failure:
return;
}
/* Interface addition from zebra daemon. */
/*
* The format of the message sent with type ZEBRA_INTERFACE_ADD or
* ZEBRA_INTERFACE_DELETE from zebra to the client is:
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | ifname |
* | |
* | |
* | |
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | ifindex |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | status |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | if_flags |
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | metric |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | speed |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | ifmtu |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | ifmtu6 |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | bandwidth |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | parent ifindex |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Link Layer Type |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Harware Address Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Hardware Address if HW lenght different from 0 |
* | ... max INTERFACE_HWADDR_MAX |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Link_params? | Whether a link-params follows: 1 or 0.
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Link_params 0 or 1 INTERFACE_LINK_PARAMS_SIZE sized |
* | .... (struct if_link_params). |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
static void zclient_vrf_add(struct zclient *zclient, vrf_id_t vrf_id)
{
struct vrf *vrf;
char vrfname_tmp[VRF_NAMSIZ];
struct vrf_data data;
stream_get(&data, zclient->ibuf, sizeof(struct vrf_data));
/* Read interface name. */
stream_get(vrfname_tmp, zclient->ibuf, VRF_NAMSIZ);
/* Lookup/create vrf by vrf_id. */
vrf = vrf_get(vrf_id, vrfname_tmp);
vrf->data.l.table_id = data.l.table_id;
memcpy(vrf->data.l.netns_name, data.l.netns_name, NS_NAMSIZ);
/* overwrite default vrf */
if (vrf_id == VRF_DEFAULT)
vrf_set_default_name(vrfname_tmp, false);
vrf_enable(vrf);
}
static void zclient_vrf_delete(struct zclient *zclient, vrf_id_t vrf_id)
{
struct vrf *vrf;
/* Lookup vrf by vrf_id. */
vrf = vrf_lookup_by_id(vrf_id);
/*
* If a routing protocol doesn't know about a
* vrf that is about to be deleted. There is
* no point in attempting to delete it.
*/
if (!vrf)
return;
vrf_delete(vrf);
}
static void zclient_interface_add(struct zclient *zclient, vrf_id_t vrf_id)
{
struct interface *ifp;
char ifname_tmp[INTERFACE_NAMSIZ];
struct stream *s = zclient->ibuf;
/* Read interface name. */
stream_get(ifname_tmp, s, INTERFACE_NAMSIZ);
/* Lookup/create interface by name. */
ifp = if_get_by_name(ifname_tmp, vrf_id);
zebra_interface_if_set_value(s, ifp);
if_new_via_zapi(ifp);
}
/*
* Read interface up/down msg (ZEBRA_INTERFACE_UP/ZEBRA_INTERFACE_DOWN)
* from zebra server. The format of this message is the same as
* that sent for ZEBRA_INTERFACE_ADD/ZEBRA_INTERFACE_DELETE,
* except that no sockaddr_dl is sent at the tail of the message.
*/
struct interface *zebra_interface_state_read(struct stream *s, vrf_id_t vrf_id)
{
struct interface *ifp;
char ifname_tmp[INTERFACE_NAMSIZ];
/* Read interface name. */
stream_get(ifname_tmp, s, INTERFACE_NAMSIZ);
/* Lookup this by interface index. */
ifp = if_lookup_by_name(ifname_tmp, vrf_id);
if (ifp == NULL) {
flog_err(EC_LIB_ZAPI_ENCODE,
"INTERFACE_STATE: Cannot find IF %s in VRF %d",
ifname_tmp, vrf_id);
return NULL;
}
zebra_interface_if_set_value(s, ifp);
return ifp;
}
static void zclient_interface_delete(struct zclient *zclient, vrf_id_t vrf_id)
{
struct interface *ifp;
struct stream *s = zclient->ibuf;
ifp = zebra_interface_state_read(s, vrf_id);
if (ifp == NULL)
return;
if_destroy_via_zapi(ifp);
return;
}
static void zclient_interface_up(struct zclient *zclient, vrf_id_t vrf_id)
{
struct interface *ifp;
struct stream *s = zclient->ibuf;
ifp = zebra_interface_state_read(s, vrf_id);
if (!ifp)
return;
if_up_via_zapi(ifp);
}
static void zclient_interface_down(struct zclient *zclient, vrf_id_t vrf_id)
{
struct interface *ifp;
struct stream *s = zclient->ibuf;
ifp = zebra_interface_state_read(s, vrf_id);
if (!ifp)
return;
if_down_via_zapi(ifp);
}
static void link_params_set_value(struct stream *s, struct if_link_params *iflp)
{
if (iflp == NULL)
return;
iflp->lp_status = stream_getl(s);
iflp->te_metric = stream_getl(s);
iflp->max_bw = stream_getf(s);
iflp->max_rsv_bw = stream_getf(s);
uint32_t bwclassnum = stream_getl(s);
{
unsigned int i;
for (i = 0; i < bwclassnum && i < MAX_CLASS_TYPE; i++)
iflp->unrsv_bw[i] = stream_getf(s);
if (i < bwclassnum)
flog_err(
EC_LIB_ZAPI_MISSMATCH,
"%s: received %d > %d (MAX_CLASS_TYPE) bw entries"
" - outdated library?",
__func__, bwclassnum, MAX_CLASS_TYPE);
}
iflp->admin_grp = stream_getl(s);
iflp->rmt_as = stream_getl(s);
iflp->rmt_ip.s_addr = stream_get_ipv4(s);
iflp->av_delay = stream_getl(s);
iflp->min_delay = stream_getl(s);
iflp->max_delay = stream_getl(s);
iflp->delay_var = stream_getl(s);
iflp->pkt_loss = stream_getf(s);
iflp->res_bw = stream_getf(s);
iflp->ava_bw = stream_getf(s);
iflp->use_bw = stream_getf(s);
}
struct interface *zebra_interface_link_params_read(struct stream *s,
vrf_id_t vrf_id)
{
struct if_link_params *iflp;
ifindex_t ifindex;
assert(s);
ifindex = stream_getl(s);
struct interface *ifp = if_lookup_by_index(ifindex, vrf_id);
if (ifp == NULL) {
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: unknown ifindex %u, shouldn't happen", __func__,
ifindex);
return NULL;
}
if ((iflp = if_link_params_get(ifp)) == NULL)
return NULL;
link_params_set_value(s, iflp);
return ifp;
}
static void zebra_interface_if_set_value(struct stream *s,
struct interface *ifp)
{
uint8_t link_params_status = 0;
ifindex_t old_ifindex;
old_ifindex = ifp->ifindex;
/* Read interface's index. */
if_set_index(ifp, stream_getl(s));
ifp->status = stream_getc(s);
/* Read interface's value. */
ifp->flags = stream_getq(s);
ifp->ptm_enable = stream_getc(s);
ifp->ptm_status = stream_getc(s);
ifp->metric = stream_getl(s);
ifp->speed = stream_getl(s);
ifp->mtu = stream_getl(s);
ifp->mtu6 = stream_getl(s);
ifp->bandwidth = stream_getl(s);
ifp->link_ifindex = stream_getl(s);
ifp->ll_type = stream_getl(s);
ifp->hw_addr_len = stream_getl(s);
if (ifp->hw_addr_len)
stream_get(ifp->hw_addr, s,
MIN(ifp->hw_addr_len, INTERFACE_HWADDR_MAX));
/* Read Traffic Engineering status */
link_params_status = stream_getc(s);
/* Then, Traffic Engineering parameters if any */
if (link_params_status) {
struct if_link_params *iflp = if_link_params_get(ifp);
link_params_set_value(s, iflp);
}
nexthop_group_interface_state_change(ifp, old_ifindex);
}
size_t zebra_interface_link_params_write(struct stream *s,
struct interface *ifp)
{
size_t w;
struct if_link_params *iflp;
int i;
if (s == NULL || ifp == NULL || ifp->link_params == NULL)
return 0;
iflp = ifp->link_params;
w = 0;
w += stream_putl(s, iflp->lp_status);
w += stream_putl(s, iflp->te_metric);
w += stream_putf(s, iflp->max_bw);
w += stream_putf(s, iflp->max_rsv_bw);
w += stream_putl(s, MAX_CLASS_TYPE);
for (i = 0; i < MAX_CLASS_TYPE; i++)
w += stream_putf(s, iflp->unrsv_bw[i]);
w += stream_putl(s, iflp->admin_grp);
w += stream_putl(s, iflp->rmt_as);
w += stream_put_in_addr(s, &iflp->rmt_ip);
w += stream_putl(s, iflp->av_delay);
w += stream_putl(s, iflp->min_delay);
w += stream_putl(s, iflp->max_delay);
w += stream_putl(s, iflp->delay_var);
w += stream_putf(s, iflp->pkt_loss);
w += stream_putf(s, iflp->res_bw);
w += stream_putf(s, iflp->ava_bw);
w += stream_putf(s, iflp->use_bw);
return w;
}
/*
* format of message for address additon is:
* 0
* 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+
* | type | ZEBRA_INTERFACE_ADDRESS_ADD or
* +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_ADDRES_DELETE
* | |
* + +
* | ifindex |
* + +
* | |
* + +
* | |
* +-+-+-+-+-+-+-+-+
* | ifc_flags | flags for connected address
* +-+-+-+-+-+-+-+-+
* | addr_family |
* +-+-+-+-+-+-+-+-+
* | addr... |
* : :
* | |
* +-+-+-+-+-+-+-+-+
* | addr_len | len of addr. E.g., addr_len = 4 for ipv4 addrs.
* +-+-+-+-+-+-+-+-+
* | daddr.. |
* : :
* | |
* +-+-+-+-+-+-+-+-+
*/
static int memconstant(const void *s, int c, size_t n)
{
const uint8_t *p = s;
while (n-- > 0)
if (*p++ != c)
return 0;
return 1;
}
struct connected *zebra_interface_address_read(int type, struct stream *s,
vrf_id_t vrf_id)
{
ifindex_t ifindex;
struct interface *ifp;
struct connected *ifc;
struct prefix p, d, *dp;
int plen;
uint8_t ifc_flags;
memset(&p, 0, sizeof(p));
memset(&d, 0, sizeof(d));
/* Get interface index. */
ifindex = stream_getl(s);
/* Lookup index. */
ifp = if_lookup_by_index(ifindex, vrf_id);
if (ifp == NULL) {
flog_err(EC_LIB_ZAPI_ENCODE,
"INTERFACE_ADDRESS_%s: Cannot find IF %u in VRF %d",
(type == ZEBRA_INTERFACE_ADDRESS_ADD) ? "ADD" : "DEL",
ifindex, vrf_id);
return NULL;
}
/* Fetch flag. */
ifc_flags = stream_getc(s);
/* Fetch interface address. */
d.family = p.family = stream_getc(s);
plen = prefix_blen(&d);
zclient_stream_get_prefix(s, &p);
/* Fetch destination address. */
stream_get(&d.u.prefix, s, plen);
/* N.B. NULL destination pointers are encoded as all zeroes */
dp = memconstant(&d.u.prefix, 0, plen) ? NULL : &d;
if (type == ZEBRA_INTERFACE_ADDRESS_ADD) {
ifc = connected_lookup_prefix_exact(ifp, &p);
if (!ifc) {
/* N.B. NULL destination pointers are encoded as all
* zeroes */
ifc = connected_add_by_prefix(ifp, &p, dp);
}
if (ifc) {
ifc->flags = ifc_flags;
if (ifc->destination)
ifc->destination->prefixlen =
ifc->address->prefixlen;
else if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER)) {
/* carp interfaces on OpenBSD with 0.0.0.0/0 as
* "peer" */
char buf[PREFIX_STRLEN];
flog_err(
EC_LIB_ZAPI_ENCODE,
"warning: interface %s address %s with peer flag set, but no peer address!",
ifp->name,
prefix2str(ifc->address, buf,
sizeof buf));
UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER);
}
}
} else {
assert(type == ZEBRA_INTERFACE_ADDRESS_DELETE);
ifc = connected_delete_by_prefix(ifp, &p);
}
return ifc;
}
/*
* format of message for neighbor connected address is:
* 0
* 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+
* | type | ZEBRA_INTERFACE_NBR_ADDRESS_ADD or
* +-+-+-+-+-+-+-+-+ ZEBRA_INTERFACE_NBR_ADDRES_DELETE
* | |
* + +
* | ifindex |
* + +
* | |
* + +
* | |
* +-+-+-+-+-+-+-+-+
* | addr_family |
* +-+-+-+-+-+-+-+-+
* | addr... |
* : :
* | |
* +-+-+-+-+-+-+-+-+
* | addr_len | len of addr.
* +-+-+-+-+-+-+-+-+
*/
struct nbr_connected *
zebra_interface_nbr_address_read(int type, struct stream *s, vrf_id_t vrf_id)
{
unsigned int ifindex;
struct interface *ifp;
struct prefix p;
struct nbr_connected *ifc;
/* Get interface index. */
ifindex = stream_getl(s);
/* Lookup index. */
ifp = if_lookup_by_index(ifindex, vrf_id);
if (ifp == NULL) {
flog_err(EC_LIB_ZAPI_ENCODE,
"INTERFACE_NBR_%s: Cannot find IF %u in VRF %d",
(type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD) ? "ADD"
: "DELETE",
ifindex, vrf_id);
return NULL;
}
p.family = stream_getc(s);
stream_get(&p.u.prefix, s, prefix_blen(&p));
p.prefixlen = stream_getc(s);
if (type == ZEBRA_INTERFACE_NBR_ADDRESS_ADD) {
/* Currently only supporting P2P links, so any new RA source
address is
considered as the replacement of the previously learnt
Link-Local address. */
if (!(ifc = listnode_head(ifp->nbr_connected))) {
ifc = nbr_connected_new();
ifc->address = prefix_new();
ifc->ifp = ifp;
listnode_add(ifp->nbr_connected, ifc);
}
prefix_copy(ifc->address, &p);
} else {
assert(type == ZEBRA_INTERFACE_NBR_ADDRESS_DELETE);
ifc = nbr_connected_check(ifp, &p);
if (ifc)
listnode_delete(ifp->nbr_connected, ifc);
}
return ifc;
}
struct interface *zebra_interface_vrf_update_read(struct stream *s,
vrf_id_t vrf_id,
vrf_id_t *new_vrf_id)
{
char ifname[INTERFACE_NAMSIZ];
struct interface *ifp;
vrf_id_t new_id;
/* Read interface name. */
stream_get(ifname, s, INTERFACE_NAMSIZ);
/* Lookup interface. */
ifp = if_lookup_by_name(ifname, vrf_id);
if (ifp == NULL) {
flog_err(EC_LIB_ZAPI_ENCODE,
"INTERFACE_VRF_UPDATE: Cannot find IF %s in VRF %d",
ifname, vrf_id);
return NULL;
}
/* Fetch new VRF Id. */
new_id = stream_getl(s);
*new_vrf_id = new_id;
return ifp;
}
/* filter unwanted messages until the expected one arrives */
static int zclient_read_sync_response(struct zclient *zclient,
uint16_t expected_cmd)
{
struct stream *s;
uint16_t size = -1;
uint8_t marker;
uint8_t version;
vrf_id_t vrf_id;
uint16_t cmd;
fd_set readfds;
int ret;
ret = 0;
cmd = expected_cmd + 1;
while (ret == 0 && cmd != expected_cmd) {
s = zclient->ibuf;
stream_reset(s);
/* wait until response arrives */
FD_ZERO(&readfds);
FD_SET(zclient->sock, &readfds);
select(zclient->sock + 1, &readfds, NULL, NULL, NULL);
if (!FD_ISSET(zclient->sock, &readfds))
continue;
/* read response */
ret = zclient_read_header(s, zclient->sock, &size, &marker,
&version, &vrf_id, &cmd);
if (zclient_debug)
zlog_debug("%s: Response (%d bytes) received", __func__,
size);
}
if (ret != 0) {
flog_err(EC_LIB_ZAPI_ENCODE, "%s: Invalid Sync Message Reply",
__func__);
return -1;
}
return 0;
}
/**
* Connect to label manager in a syncronous way
*
* It first writes the request to zcient output buffer and then
* immediately reads the answer from the input buffer.
*
* @param zclient Zclient used to connect to label manager (zebra)
* @param async Synchronous (0) or asynchronous (1) operation
* @result Result of response
*/
int lm_label_manager_connect(struct zclient *zclient, int async)
{
int ret;
struct stream *s;
uint8_t result;
uint16_t cmd = async ? ZEBRA_LABEL_MANAGER_CONNECT_ASYNC :
ZEBRA_LABEL_MANAGER_CONNECT;
if (zclient_debug)
zlog_debug("Connecting to Label Manager (LM)");
if (zclient->sock < 0) {
zlog_debug("%s: invalid zclient socket", __func__);
return -1;
}
/* send request */
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, cmd, VRF_DEFAULT);
/* proto */
stream_putc(s, zclient->redist_default);
/* instance */
stream_putw(s, zclient->instance);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
ret = writen(zclient->sock, s->data, stream_get_endp(s));
if (ret < 0) {
flog_err(EC_LIB_ZAPI_SOCKET, "Can't write to zclient sock");
close(zclient->sock);
zclient->sock = -1;
return -1;
}
if (ret == 0) {
flog_err(EC_LIB_ZAPI_SOCKET, "Zclient sock closed");
close(zclient->sock);
zclient->sock = -1;
return -1;
}
if (zclient_debug)
zlog_debug("LM connect request sent (%d bytes)", ret);
if (async)
return 0;
/* read response */
if (zclient_read_sync_response(zclient, cmd)
!= 0)
return -1;
s = zclient->ibuf;
/* read instance and proto */
uint8_t proto = stream_getc(s);
uint16_t instance = stream_getw(s);
/* sanity */
if (proto != zclient->redist_default)
flog_err(
EC_LIB_ZAPI_ENCODE,
"Wrong proto (%u) in LM connect response. Should be %u",
proto, zclient->redist_default);
if (instance != zclient->instance)
flog_err(
EC_LIB_ZAPI_ENCODE,
"Wrong instId (%u) in LM connect response. Should be %u",
instance, zclient->instance);
/* result code */
result = stream_getc(s);
if (zclient_debug)
zlog_debug("LM connect-response received, result %u", result);
return (int)result;
}
/*
* Asynchronous label chunk request
*
* @param zclient Zclient used to connect to label manager (zebra)
* @param keep Avoid garbage collection
* @param chunk_size Amount of labels requested
* @param base Base for the label chunk. if MPLS_LABEL_BASE_ANY we do not care
* @result 0 on success, -1 otherwise
*/
int zclient_send_get_label_chunk(struct zclient *zclient, uint8_t keep,
uint32_t chunk_size, uint32_t base)
{
struct stream *s;
if (zclient_debug)
zlog_debug("Getting Label Chunk");
if (zclient->sock < 0)
return -1;
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, VRF_DEFAULT);
/* proto */
stream_putc(s, zclient->redist_default);
/* instance */
stream_putw(s, zclient->instance);
stream_putc(s, keep);
stream_putl(s, chunk_size);
stream_putl(s, base);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
/**
* Function to request a label chunk in a syncronous way
*
* It first writes the request to zlcient output buffer and then
* immediately reads the answer from the input buffer.
*
* @param zclient Zclient used to connect to label manager (zebra)
* @param keep Avoid garbage collection
* @param chunk_size Amount of labels requested
* @param start To write first assigned chunk label to
* @param end To write last assigned chunk label to
* @result 0 on success, -1 otherwise
*/
int lm_get_label_chunk(struct zclient *zclient, uint8_t keep, uint32_t base,
uint32_t chunk_size, uint32_t *start, uint32_t *end)
{
int ret;
struct stream *s;
uint8_t response_keep;
if (zclient_debug)
zlog_debug("Getting Label Chunk");
if (zclient->sock < 0)
return -1;
/* send request */
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_GET_LABEL_CHUNK, VRF_DEFAULT);
/* proto */
stream_putc(s, zclient->redist_default);
/* instance */
stream_putw(s, zclient->instance);
/* keep */
stream_putc(s, keep);
/* chunk size */
stream_putl(s, chunk_size);
/* requested chunk base */
stream_putl(s, base);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
ret = writen(zclient->sock, s->data, stream_get_endp(s));
if (ret < 0) {
flog_err(EC_LIB_ZAPI_SOCKET, "Can't write to zclient sock");
close(zclient->sock);
zclient->sock = -1;
return -1;
}
if (ret == 0) {
flog_err(EC_LIB_ZAPI_SOCKET, "Zclient sock closed");
close(zclient->sock);
zclient->sock = -1;
return -1;
}
if (zclient_debug)
zlog_debug("Label chunk request (%d bytes) sent", ret);
/* read response */
if (zclient_read_sync_response(zclient, ZEBRA_GET_LABEL_CHUNK) != 0)
return -1;
/* parse response */
s = zclient->ibuf;
/* read proto and instance */
uint8_t proto = stream_getc(s);
uint16_t instance = stream_getw(s);
/* sanities */
if (proto != zclient->redist_default)
flog_err(EC_LIB_ZAPI_ENCODE,
"Wrong proto (%u) in get chunk response. Should be %u",
proto, zclient->redist_default);
if (instance != zclient->instance)
flog_err(EC_LIB_ZAPI_ENCODE,
"Wrong instId (%u) in get chunk response Should be %u",
instance, zclient->instance);
/* if we requested a specific chunk and it could not be allocated, the
* response message will end here
*/
if (!STREAM_READABLE(s)) {
zlog_info("Unable to assign Label Chunk to %s instance %u",
zebra_route_string(proto), instance);
return -1;
}
/* keep */
response_keep = stream_getc(s);
/* start and end labels */
*start = stream_getl(s);
*end = stream_getl(s);
/* not owning this response */
if (keep != response_keep) {
flog_err(
EC_LIB_ZAPI_ENCODE,
"Invalid Label chunk: %u - %u, keeps mismatch %u != %u",
*start, *end, keep, response_keep);
}
/* sanity */
if (*start > *end || *start < MPLS_LABEL_UNRESERVED_MIN
|| *end > MPLS_LABEL_UNRESERVED_MAX) {
flog_err(EC_LIB_ZAPI_ENCODE, "Invalid Label chunk: %u - %u",
*start, *end);
return -1;
}
if (zclient_debug)
zlog_debug("Label Chunk assign: %u - %u (%u)", *start, *end,
response_keep);
return 0;
}
/**
* Function to release a label chunk
*
* @param zclient Zclient used to connect to label manager (zebra)
* @param start First label of chunk
* @param end Last label of chunk
* @result 0 on success, -1 otherwise
*/
int lm_release_label_chunk(struct zclient *zclient, uint32_t start,
uint32_t end)
{
int ret;
struct stream *s;
if (zclient_debug)
zlog_debug("Releasing Label Chunk %u - %u", start, end);
if (zclient->sock < 0)
return -1;
/* send request */
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_RELEASE_LABEL_CHUNK, VRF_DEFAULT);
/* proto */
stream_putc(s, zclient->redist_default);
/* instance */
stream_putw(s, zclient->instance);
/* start */
stream_putl(s, start);
/* end */
stream_putl(s, end);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
ret = writen(zclient->sock, s->data, stream_get_endp(s));
if (ret < 0) {
flog_err(EC_LIB_ZAPI_SOCKET, "Can't write to zclient sock");
close(zclient->sock);
zclient->sock = -1;
return -1;
}
if (ret == 0) {
flog_err(EC_LIB_ZAPI_SOCKET, "Zclient sock connection closed");
close(zclient->sock);
zclient->sock = -1;
return -1;
}
return 0;
}
/**
* Connect to table manager in a syncronous way
*
* It first writes the request to zcient output buffer and then
* immediately reads the answer from the input buffer.
*
* @param zclient Zclient used to connect to table manager (zebra)
* @result Result of response
*/
int tm_table_manager_connect(struct zclient *zclient)
{
int ret;
struct stream *s;
uint8_t result;
if (zclient_debug)
zlog_debug("Connecting to Table Manager");
if (zclient->sock < 0)
return -1;
/* send request */
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_TABLE_MANAGER_CONNECT, VRF_DEFAULT);
/* proto */
stream_putc(s, zclient->redist_default);
/* instance */
stream_putw(s, zclient->instance);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
ret = zclient_send_message(zclient);
if (ret < 0)
return -1;
if (zclient_debug)
zlog_debug("%s: Table manager connect request sent", __func__);
/* read response */
if (zclient_read_sync_response(zclient, ZEBRA_TABLE_MANAGER_CONNECT)
!= 0)
return -1;
/* result */
s = zclient->ibuf;
STREAM_GETC(s, result);
if (zclient_debug)
zlog_debug(
"%s: Table Manager connect response received, result %u",
__func__, result);
return (int)result;
stream_failure:
return -1;
}
/**
* Function to request a table chunk in a syncronous way
*
* It first writes the request to zclient output buffer and then
* immediately reads the answer from the input buffer.
*
* @param zclient Zclient used to connect to table manager (zebra)
* @param chunk_size Amount of table requested
* @param start to write first assigned chunk table RT ID to
* @param end To write last assigned chunk table RT ID to
* @result 0 on success, -1 otherwise
*/
int tm_get_table_chunk(struct zclient *zclient, uint32_t chunk_size,
uint32_t *start, uint32_t *end)
{
int ret;
struct stream *s;
if (zclient_debug)
zlog_debug("Getting Table Chunk");
if (zclient->sock < 0)
return -1;
/* send request */
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_GET_TABLE_CHUNK, VRF_DEFAULT);
/* chunk size */
stream_putl(s, chunk_size);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
ret = writen(zclient->sock, s->data, stream_get_endp(s));
if (ret < 0) {
flog_err(EC_LIB_ZAPI_SOCKET, "%s: can't write to zclient->sock",
__func__);
close(zclient->sock);
zclient->sock = -1;
return -1;
}
if (ret == 0) {
flog_err(EC_LIB_ZAPI_SOCKET,
"%s: zclient->sock connection closed", __func__);
close(zclient->sock);
zclient->sock = -1;
return -1;
}
if (zclient_debug)
zlog_debug("%s: Table chunk request (%d bytes) sent", __func__,
ret);
/* read response */
if (zclient_read_sync_response(zclient, ZEBRA_GET_TABLE_CHUNK) != 0)
return -1;
s = zclient->ibuf;
/* start and end table IDs */
STREAM_GETL(s, *start);
STREAM_GETL(s, *end);
if (zclient_debug)
zlog_debug("Table Chunk assign: %u - %u ", *start, *end);
return 0;
stream_failure:
return -1;
}
/**
* Function to release a table chunk
*
* @param zclient Zclient used to connect to table manager (zebra)
* @param start First label of table
* @param end Last label of chunk
* @result 0 on success, -1 otherwise
*/
int tm_release_table_chunk(struct zclient *zclient, uint32_t start,
uint32_t end)
{
struct stream *s;
if (zclient_debug)
zlog_debug("Releasing Table Chunk");
if (zclient->sock < 0)
return -1;
/* send request */
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_RELEASE_TABLE_CHUNK, VRF_DEFAULT);
/* start */
stream_putl(s, start);
/* end */
stream_putl(s, end);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
int zebra_send_mpls_labels(struct zclient *zclient, int cmd,
struct zapi_labels *zl)
{
if (zapi_labels_encode(zclient->obuf, cmd, zl) < 0)
return -1;
return zclient_send_message(zclient);
}
int zapi_labels_encode(struct stream *s, int cmd, struct zapi_labels *zl)
{
struct zapi_nexthop_label *znh;
stream_reset(s);
zclient_create_header(s, cmd, VRF_DEFAULT);
stream_putc(s, zl->message);
stream_putc(s, zl->type);
stream_putl(s, zl->local_label);
if (CHECK_FLAG(zl->message, ZAPI_LABELS_FTN)) {
stream_putw(s, zl->route.prefix.family);
stream_put_prefix(s, &zl->route.prefix);
stream_putc(s, zl->route.type);
stream_putw(s, zl->route.instance);
}
if (zl->nexthop_num > MULTIPATH_NUM) {
flog_err(
EC_LIB_ZAPI_ENCODE,
"%s: label %u: can't encode %u nexthops (maximum is %u)",
__func__, zl->local_label, zl->nexthop_num,
MULTIPATH_NUM);
return -1;
}
stream_putw(s, zl->nexthop_num);
for (int i = 0; i < zl->nexthop_num; i++) {
znh = &zl->nexthops[i];
stream_putc(s, znh->type);
stream_putw(s, znh->family);
switch (znh->family) {
case AF_INET:
stream_put_in_addr(s, &znh->address.ipv4);
break;
case AF_INET6:
stream_write(s, (uint8_t *)&znh->address.ipv6, 16);
break;
default:
break;
}
stream_putl(s, znh->ifindex);
stream_putl(s, znh->label);
}
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return 0;
}
int zapi_labels_decode(struct stream *s, struct zapi_labels *zl)
{
struct zapi_nexthop_label *znh;
memset(zl, 0, sizeof(*zl));
/* Get data. */
STREAM_GETC(s, zl->message);
STREAM_GETC(s, zl->type);
STREAM_GETL(s, zl->local_label);
if (CHECK_FLAG(zl->message, ZAPI_LABELS_FTN)) {
size_t psize;
STREAM_GETW(s, zl->route.prefix.family);
STREAM_GETC(s, zl->route.prefix.prefixlen);
psize = PSIZE(zl->route.prefix.prefixlen);
switch (zl->route.prefix.family) {
case AF_INET:
if (zl->route.prefix.prefixlen > IPV4_MAX_BITLEN) {
zlog_debug(
"%s: Specified prefix length %d is greater than a v4 address can support",
__PRETTY_FUNCTION__,
zl->route.prefix.prefixlen);
return -1;
}
STREAM_GET(&zl->route.prefix.u.prefix4.s_addr, s,
psize);
break;
case AF_INET6:
if (zl->route.prefix.prefixlen > IPV6_MAX_BITLEN) {
zlog_debug(
"%s: Specified prefix length %d is greater than a v6 address can support",
__PRETTY_FUNCTION__,
zl->route.prefix.prefixlen);
return -1;
}
STREAM_GET(&zl->route.prefix.u.prefix6, s, psize);
break;
default:
flog_err(EC_LIB_ZAPI_ENCODE,
"%s: Specified family %u is not v4 or v6",
__PRETTY_FUNCTION__, zl->route.prefix.family);
return -1;
}
STREAM_GETC(s, zl->route.type);
STREAM_GETW(s, zl->route.instance);
}
STREAM_GETW(s, zl->nexthop_num);
for (int i = 0; i < zl->nexthop_num; i++) {
znh = &zl->nexthops[i];
STREAM_GETC(s, znh->type);
STREAM_GETW(s, znh->family);
switch (znh->family) {
case AF_INET:
STREAM_GET(&znh->address.ipv4.s_addr, s,
IPV4_MAX_BYTELEN);
break;
case AF_INET6:
STREAM_GET(&znh->address.ipv6, s, 16);
break;
default:
break;
}
STREAM_GETL(s, znh->ifindex);
STREAM_GETL(s, znh->label);
}
return 0;
stream_failure:
return -1;
}
int zebra_send_pw(struct zclient *zclient, int command, struct zapi_pw *pw)
{
struct stream *s;
/* Reset stream. */
s = zclient->obuf;
stream_reset(s);
zclient_create_header(s, command, VRF_DEFAULT);
stream_write(s, pw->ifname, IF_NAMESIZE);
stream_putl(s, pw->ifindex);
/* Put type */
stream_putl(s, pw->type);
/* Put nexthop */
stream_putl(s, pw->af);
switch (pw->af) {
case AF_INET:
stream_put_in_addr(s, &pw->nexthop.ipv4);
break;
case AF_INET6:
stream_write(s, (uint8_t *)&pw->nexthop.ipv6, 16);
break;
default:
flog_err(EC_LIB_ZAPI_ENCODE, "%s: unknown af", __func__);
return -1;
}
/* Put labels */
stream_putl(s, pw->local_label);
stream_putl(s, pw->remote_label);
/* Put flags */
stream_putc(s, pw->flags);
/* Protocol specific fields */
stream_write(s, &pw->data, sizeof(union pw_protocol_fields));
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
/*
* Receive PW status update from Zebra and send it to LDE process.
*/
void zebra_read_pw_status_update(ZAPI_CALLBACK_ARGS, struct zapi_pw_status *pw)
{
struct stream *s;
memset(pw, 0, sizeof(struct zapi_pw_status));
s = zclient->ibuf;
/* Get data. */
stream_get(pw->ifname, s, IF_NAMESIZE);
pw->ifindex = stream_getl(s);
pw->status = stream_getl(s);
}
static void zclient_capability_decode(ZAPI_CALLBACK_ARGS)
{
struct zclient_capabilities cap;
struct stream *s = zclient->ibuf;
int vrf_backend;
uint8_t mpls_enabled;
STREAM_GETL(s, vrf_backend);
vrf_configure_backend(vrf_backend);
memset(&cap, 0, sizeof(cap));
STREAM_GETC(s, mpls_enabled);
cap.mpls_enabled = !!mpls_enabled;
STREAM_GETL(s, cap.ecmp);
STREAM_GETC(s, cap.role);
if (zclient->zebra_capabilities)
(*zclient->zebra_capabilities)(&cap);
stream_failure:
return;
}
/* Zebra client message read function. */
static int zclient_read(struct thread *thread)
{
size_t already;
uint16_t length, command;
uint8_t marker, version;
vrf_id_t vrf_id;
struct zclient *zclient;
/* Get socket to zebra. */
zclient = THREAD_ARG(thread);
zclient->t_read = NULL;
/* Read zebra header (if we don't have it already). */
if ((already = stream_get_endp(zclient->ibuf)) < ZEBRA_HEADER_SIZE) {
ssize_t nbyte;
if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock,
ZEBRA_HEADER_SIZE - already))
== 0)
|| (nbyte == -1)) {
if (zclient_debug)
zlog_debug(
"zclient connection closed socket [%d].",
zclient->sock);
return zclient_failed(zclient);
}
if (nbyte != (ssize_t)(ZEBRA_HEADER_SIZE - already)) {
/* Try again later. */
zclient_event(ZCLIENT_READ, zclient);
return 0;
}
already = ZEBRA_HEADER_SIZE;
}
/* Reset to read from the beginning of the incoming packet. */
stream_set_getp(zclient->ibuf, 0);
/* Fetch header values. */
length = stream_getw(zclient->ibuf);
marker = stream_getc(zclient->ibuf);
version = stream_getc(zclient->ibuf);
vrf_id = stream_getl(zclient->ibuf);
command = stream_getw(zclient->ibuf);
if (marker != ZEBRA_HEADER_MARKER || version != ZSERV_VERSION) {
flog_err(
EC_LIB_ZAPI_MISSMATCH,
"%s: socket %d version mismatch, marker %d, version %d",
__func__, zclient->sock, marker, version);
return zclient_failed(zclient);
}
if (length < ZEBRA_HEADER_SIZE) {
flog_err(EC_LIB_ZAPI_MISSMATCH,
"%s: socket %d message length %u is less than %d ",
__func__, zclient->sock, length, ZEBRA_HEADER_SIZE);
return zclient_failed(zclient);
}
/* Length check. */
if (length > STREAM_SIZE(zclient->ibuf)) {
struct stream *ns;
flog_err(
EC_LIB_ZAPI_ENCODE,
"%s: message size %u exceeds buffer size %lu, expanding...",
__func__, length,
(unsigned long)STREAM_SIZE(zclient->ibuf));
ns = stream_new(length);
stream_copy(ns, zclient->ibuf);
stream_free(zclient->ibuf);
zclient->ibuf = ns;
}
/* Read rest of zebra packet. */
if (already < length) {
ssize_t nbyte;
if (((nbyte = stream_read_try(zclient->ibuf, zclient->sock,
length - already))
== 0)
|| (nbyte == -1)) {
if (zclient_debug)
zlog_debug(
"zclient connection closed socket [%d].",
zclient->sock);
return zclient_failed(zclient);
}
if (nbyte != (ssize_t)(length - already)) {
/* Try again later. */
zclient_event(ZCLIENT_READ, zclient);
return 0;
}
}
length -= ZEBRA_HEADER_SIZE;
if (zclient_debug)
zlog_debug("zclient 0x%p command %s VRF %u",
(void *)zclient, zserv_command_string(command),
vrf_id);
switch (command) {
case ZEBRA_CAPABILITIES:
zclient_capability_decode(command, zclient, length, vrf_id);
break;
case ZEBRA_ROUTER_ID_UPDATE:
if (zclient->router_id_update)
(*zclient->router_id_update)(command, zclient, length,
vrf_id);
break;
case ZEBRA_VRF_ADD:
zclient_vrf_add(zclient, vrf_id);
break;
case ZEBRA_VRF_DELETE:
zclient_vrf_delete(zclient, vrf_id);
break;
case ZEBRA_INTERFACE_ADD:
zclient_interface_add(zclient, vrf_id);
break;
case ZEBRA_INTERFACE_DELETE:
zclient_interface_delete(zclient, vrf_id);
break;
case ZEBRA_INTERFACE_ADDRESS_ADD:
if (zclient->interface_address_add)
(*zclient->interface_address_add)(command, zclient,
length, vrf_id);
break;
case ZEBRA_INTERFACE_ADDRESS_DELETE:
if (zclient->interface_address_delete)
(*zclient->interface_address_delete)(command, zclient,
length, vrf_id);
break;
case ZEBRA_INTERFACE_BFD_DEST_UPDATE:
if (zclient->interface_bfd_dest_update)
(*zclient->interface_bfd_dest_update)(command, zclient,
length, vrf_id);
break;
case ZEBRA_INTERFACE_NBR_ADDRESS_ADD:
if (zclient->interface_nbr_address_add)
(*zclient->interface_nbr_address_add)(command, zclient,
length, vrf_id);
break;
case ZEBRA_INTERFACE_NBR_ADDRESS_DELETE:
if (zclient->interface_nbr_address_delete)
(*zclient->interface_nbr_address_delete)(
command, zclient, length, vrf_id);
break;
case ZEBRA_INTERFACE_UP:
zclient_interface_up(zclient, vrf_id);
break;
case ZEBRA_INTERFACE_DOWN:
zclient_interface_down(zclient, vrf_id);
break;
case ZEBRA_INTERFACE_VRF_UPDATE:
if (zclient->interface_vrf_update)
(*zclient->interface_vrf_update)(command, zclient,
length, vrf_id);
break;
case ZEBRA_NEXTHOP_UPDATE:
if (zclient_debug)
zlog_debug("zclient rcvd nexthop update");
if (zclient->nexthop_update)
(*zclient->nexthop_update)(command, zclient, length,
vrf_id);
break;
case ZEBRA_IMPORT_CHECK_UPDATE:
if (zclient_debug)
zlog_debug("zclient rcvd import check update");
if (zclient->import_check_update)
(*zclient->import_check_update)(command, zclient,
length, vrf_id);
break;
case ZEBRA_BFD_DEST_REPLAY:
if (zclient->bfd_dest_replay)
(*zclient->bfd_dest_replay)(command, zclient, length,
vrf_id);
break;
case ZEBRA_REDISTRIBUTE_ROUTE_ADD:
if (zclient->redistribute_route_add)
(*zclient->redistribute_route_add)(command, zclient,
length, vrf_id);
break;
case ZEBRA_REDISTRIBUTE_ROUTE_DEL:
if (zclient->redistribute_route_del)
(*zclient->redistribute_route_del)(command, zclient,
length, vrf_id);
break;
case ZEBRA_INTERFACE_LINK_PARAMS:
if (zclient->interface_link_params)
(*zclient->interface_link_params)(command, zclient,
length, vrf_id);
break;
case ZEBRA_FEC_UPDATE:
if (zclient_debug)
zlog_debug("zclient rcvd fec update");
if (zclient->fec_update)
(*zclient->fec_update)(command, zclient, length);
break;
case ZEBRA_LOCAL_ES_ADD:
if (zclient->local_es_add)
(*zclient->local_es_add)(command, zclient, length,
vrf_id);
break;
case ZEBRA_LOCAL_ES_DEL:
if (zclient->local_es_del)
(*zclient->local_es_del)(command, zclient, length,
vrf_id);
break;
case ZEBRA_VNI_ADD:
if (zclient->local_vni_add)
(*zclient->local_vni_add)(command, zclient, length,
vrf_id);
break;
case ZEBRA_VNI_DEL:
if (zclient->local_vni_del)
(*zclient->local_vni_del)(command, zclient, length,
vrf_id);
break;
case ZEBRA_L3VNI_ADD:
if (zclient->local_l3vni_add)
(*zclient->local_l3vni_add)(command, zclient, length,
vrf_id);
break;
case ZEBRA_L3VNI_DEL:
if (zclient->local_l3vni_del)
(*zclient->local_l3vni_del)(command, zclient, length,
vrf_id);
break;
case ZEBRA_MACIP_ADD:
if (zclient->local_macip_add)
(*zclient->local_macip_add)(command, zclient, length,
vrf_id);
break;
case ZEBRA_MACIP_DEL:
if (zclient->local_macip_del)
(*zclient->local_macip_del)(command, zclient, length,
vrf_id);
break;
case ZEBRA_IP_PREFIX_ROUTE_ADD:
if (zclient->local_ip_prefix_add)
(*zclient->local_ip_prefix_add)(command, zclient,
length, vrf_id);
break;
case ZEBRA_IP_PREFIX_ROUTE_DEL:
if (zclient->local_ip_prefix_del)
(*zclient->local_ip_prefix_del)(command, zclient,
length, vrf_id);
break;
case ZEBRA_PW_STATUS_UPDATE:
if (zclient->pw_status_update)
(*zclient->pw_status_update)(command, zclient, length,
vrf_id);
break;
case ZEBRA_ROUTE_NOTIFY_OWNER:
if (zclient->route_notify_owner)
(*zclient->route_notify_owner)(command, zclient, length,
vrf_id);
break;
case ZEBRA_RULE_NOTIFY_OWNER:
if (zclient->rule_notify_owner)
(*zclient->rule_notify_owner)(command, zclient, length,
vrf_id);
break;
case ZEBRA_GET_LABEL_CHUNK:
if (zclient->label_chunk)
(*zclient->label_chunk)(command, zclient, length,
vrf_id);
break;
case ZEBRA_IPSET_NOTIFY_OWNER:
if (zclient->ipset_notify_owner)
(*zclient->ipset_notify_owner)(command, zclient, length,
vrf_id);
break;
case ZEBRA_IPSET_ENTRY_NOTIFY_OWNER:
if (zclient->ipset_entry_notify_owner)
(*zclient->ipset_entry_notify_owner)(command,
zclient, length,
vrf_id);
break;
case ZEBRA_IPTABLE_NOTIFY_OWNER:
if (zclient->iptable_notify_owner)
(*zclient->iptable_notify_owner)(command,
zclient, length,
vrf_id);
break;
case ZEBRA_VXLAN_SG_ADD:
if (zclient->vxlan_sg_add)
(*zclient->vxlan_sg_add)(command, zclient, length,
vrf_id);
break;
case ZEBRA_VXLAN_SG_DEL:
if (zclient->vxlan_sg_del)
(*zclient->vxlan_sg_del)(command, zclient, length,
vrf_id);
break;
default:
break;
}
if (zclient->sock < 0)
/* Connection was closed during packet processing. */
return -1;
/* Register read thread. */
stream_reset(zclient->ibuf);
zclient_event(ZCLIENT_READ, zclient);
return 0;
}
void zclient_redistribute(int command, struct zclient *zclient, afi_t afi,
int type, unsigned short instance, vrf_id_t vrf_id)
{
if (instance) {
if (command == ZEBRA_REDISTRIBUTE_ADD) {
if (redist_check_instance(
&zclient->mi_redist[afi][type], instance))
return;
redist_add_instance(&zclient->mi_redist[afi][type],
instance);
} else {
if (!redist_check_instance(
&zclient->mi_redist[afi][type], instance))
return;
redist_del_instance(&zclient->mi_redist[afi][type],
instance);
}
} else {
if (command == ZEBRA_REDISTRIBUTE_ADD) {
if (vrf_bitmap_check(zclient->redist[afi][type],
vrf_id))
return;
vrf_bitmap_set(zclient->redist[afi][type], vrf_id);
} else {
if (!vrf_bitmap_check(zclient->redist[afi][type],
vrf_id))
return;
vrf_bitmap_unset(zclient->redist[afi][type], vrf_id);
}
}
if (zclient->sock > 0)
zebra_redistribute_send(command, zclient, afi, type, instance,
vrf_id);
}
void zclient_redistribute_default(int command, struct zclient *zclient,
afi_t afi, vrf_id_t vrf_id)
{
if (command == ZEBRA_REDISTRIBUTE_DEFAULT_ADD) {
if (vrf_bitmap_check(zclient->default_information[afi], vrf_id))
return;
vrf_bitmap_set(zclient->default_information[afi], vrf_id);
} else {
if (!vrf_bitmap_check(zclient->default_information[afi],
vrf_id))
return;
vrf_bitmap_unset(zclient->default_information[afi], vrf_id);
}
if (zclient->sock > 0)
zebra_redistribute_default_send(command, zclient, afi, vrf_id);
}
static void zclient_event(enum event event, struct zclient *zclient)
{
switch (event) {
case ZCLIENT_SCHEDULE:
thread_add_event(zclient->master, zclient_connect, zclient, 0,
&zclient->t_connect);
break;
case ZCLIENT_CONNECT:
if (zclient_debug)
zlog_debug(
"zclient connect failures: %d schedule interval is now %d",
zclient->fail, zclient->fail < 3 ? 10 : 60);
thread_add_timer(zclient->master, zclient_connect, zclient,
zclient->fail < 3 ? 10 : 60,
&zclient->t_connect);
break;
case ZCLIENT_READ:
zclient->t_read = NULL;
thread_add_read(zclient->master, zclient_read, zclient,
zclient->sock, &zclient->t_read);
break;
}
}
void zclient_interface_set_master(struct zclient *client,
struct interface *master,
struct interface *slave)
{
struct stream *s;
s = client->obuf;
stream_reset(s);
zclient_create_header(s, ZEBRA_INTERFACE_SET_MASTER, master->vrf_id);
stream_putl(s, master->vrf_id);
stream_putl(s, master->ifindex);
stream_putl(s, slave->vrf_id);
stream_putl(s, slave->ifindex);
stream_putw_at(s, 0, stream_get_endp(s));
zclient_send_message(client);
}
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