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zclient.c
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zclient.c
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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"
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 *);
struct sockaddr_storage zclient_addr;
socklen_t zclient_addr_len;
/* This file local debug flag. */
int zclient_debug = 0;
struct zclient_options zclient_options_default = {.receive_notify = false};
/* Allocate zclient structure. */
struct zclient *zclient_new_notify(struct thread_master *master,
struct zclient_options *opt)
{
struct zclient *zclient;
zclient = XCALLOC(MTYPE_ZCLIENT, sizeof(struct zclient));
zclient->ibuf = stream_new(ZEBRA_MAX_PACKET_SIZ);
zclient->obuf = stream_new(ZEBRA_MAX_PACKET_SIZ);
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);
}
u_short *redist_check_instance(struct redist_proto *red, u_short instance)
{
struct listnode *node;
u_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, u_short instance)
{
u_short *in;
red->enabled = 1;
if (!red->instances)
red->instances = list_new();
in = XMALLOC(MTYPE_REDIST_INST, sizeof(u_short));
*in = instance;
listnode_add(red->instances, in);
}
void redist_del_instance(struct redist_proto *red, u_short instance)
{
u_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_and_null(&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);
zclient->default_information = 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_notify
*/
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);
zclient->privs->change(ZPRIVS_RAISE);
setsockopt_so_sendbuf(sock, 1048576);
zclient->privs->change(ZPRIVS_LOWER);
/* Connect to zebra. */
ret = connect(sock, (struct sockaddr *)&zclient_addr, zclient_addr_len);
if (ret < 0) {
if (zclient_debug)
zlog_warn("%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:
zlog_warn(
"%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:
zlog_warn("%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, u_int16_t *size,
u_char *marker, u_char *version, vrf_id_t *vrf_id,
u_int16_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) {
zlog_err(
"%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;
stream_failure:
return 0;
}
/* 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;
u_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);
}
}
}
/* 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_ADD,
zclient, afi, i, 0,
vrf_id);
/* If default information is needed. */
if (vrf_bitmap_check(zclient->default_information, VRF_DEFAULT))
zebra_message_send(zclient, ZEBRA_REDISTRIBUTE_DEFAULT_ADD,
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);
/* We need interface information. */
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;
u_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, VRF_DEFAULT))
zebra_message_send(zclient, ZEBRA_REDISTRIBUTE_DEFAULT_DELETE,
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);
}
/* 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)
zlog_warn("%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);
/* 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, u_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 = vrf_bitmap_init();
if (zclient_debug)
zlog_debug("zclient_start is called");
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_ipv4. zapi_ipv4_read() then writes
* the info down the zclient socket using the stream_* functions.
*
* The corresponding read ("xdr_decode") function on the server
* side is zread_ipv4_add()/zread_ipv4_delete().
*
* 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_ipv4, zapi_ipv4_route() and zread_ipv4_*()
* 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_ipv4_route()
* using the same zapi_ipv4 structure. This is done by setting zapi_ipv4
* 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
*
* zapi_ipv4_route() will produce two nexthop data units for each such
* interleaved 64-bit nexthop. On the zserv side of the socket it will be
* mapped to a singlle NEXTHOP_TYPE_IPV4_IFINDEX_OL RIB nexthop structure.
*
* 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 zapi_ipv4_route(u_char cmd, struct zclient *zclient, struct prefix_ipv4 *p,
struct zapi_ipv4 *api)
{
int i;
int psize;
struct stream *s;
/* Reset stream. */
s = zclient->obuf;
stream_reset(s);
/* Some checks for labeled-unicast. The current expectation is that each
* nexthop is accompanied by a label in the case of labeled-unicast.
*/
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)
&& CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) {
/* We expect prefixes installed with labels and the number to
* match
* the number of nexthops.
*/
assert(api->label_num == api->nexthop_num);
}
zclient_create_header(s, cmd, api->vrf_id);
/* Put type and nexthop. */
stream_putc(s, api->type);
stream_putw(s, api->instance);
stream_putl(s, api->flags);
stream_putc(s, api->message);
stream_putw(s, api->safi);
/* Put prefix information. */
psize = PSIZE(p->prefixlen);
stream_putc(s, p->prefixlen);
stream_write(s, (u_char *)&p->prefix, psize);
/* Nexthop, ifindex, distance and metric information. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) {
stream_putc(s, api->nexthop_num + api->ifindex_num);
for (i = 0; i < api->nexthop_num; i++) {
stream_putc(s, NEXTHOP_TYPE_IPV4);
stream_put_in_addr(s, api->nexthop[i]);
/* For labeled-unicast, each nexthop is followed by
* label. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL))
stream_putl(s, api->label[i]);
}
for (i = 0; i < api->ifindex_num; i++) {
stream_putc(s, NEXTHOP_TYPE_IFINDEX);
stream_putl(s, api->ifindex[i]);
}
}
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);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
int zapi_ipv4_route_ipv6_nexthop(u_char cmd, struct zclient *zclient,
struct prefix_ipv4 *p, struct zapi_ipv6 *api)
{
int i;
int psize;
struct stream *s;
/* Reset stream. */
s = zclient->obuf;
stream_reset(s);
/* Some checks for labeled-unicast. The current expectation is that each
* nexthop is accompanied by a label in the case of labeled-unicast.
*/
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)
&& CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) {
/* We expect prefixes installed with labels and the number to
* match
* the number of nexthops.
*/
assert(api->label_num == api->nexthop_num);
}
zclient_create_header(s, cmd, api->vrf_id);
/* Put type and nexthop. */
stream_putc(s, api->type);
stream_putw(s, api->instance);
stream_putl(s, api->flags);
stream_putc(s, api->message);
stream_putw(s, api->safi);
/* Put prefix information. */
psize = PSIZE(p->prefixlen);
stream_putc(s, p->prefixlen);
stream_write(s, (u_char *)&p->prefix, psize);
/* Nexthop, ifindex, distance and metric information. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) {
stream_putc(s, api->nexthop_num + api->ifindex_num);
for (i = 0; i < api->nexthop_num; i++) {
stream_putc(s, NEXTHOP_TYPE_IPV6);
stream_write(s, (u_char *)api->nexthop[i], 16);
/* For labeled-unicast, each nexthop is followed by
* label. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL))
stream_putl(s, api->label[i]);
}
for (i = 0; i < api->ifindex_num; i++) {
stream_putc(s, NEXTHOP_TYPE_IFINDEX);
stream_putl(s, api->ifindex[i]);
}
}
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);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
int zapi_ipv6_route(u_char cmd, struct zclient *zclient, struct prefix_ipv6 *p,
struct prefix_ipv6 *src_p, struct zapi_ipv6 *api)
{
int i;
int psize;
struct stream *s;
/* either we have !SRCPFX && src_p == NULL, or SRCPFX && src_p != NULL
*/
assert(!(api->message & ZAPI_MESSAGE_SRCPFX) == !src_p);
/* Reset stream. */
s = zclient->obuf;
stream_reset(s);
/* Some checks for labeled-unicast. The current expectation is that each
* nexthop is accompanied by a label in the case of labeled-unicast.
*/
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL)
&& CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) {
/* We expect prefixes installed with labels and the number to
* match
* the number of nexthops.
*/
assert(api->label_num == api->nexthop_num);
}
zclient_create_header(s, cmd, api->vrf_id);
/* Put type and nexthop. */
stream_putc(s, api->type);
stream_putw(s, api->instance);
stream_putl(s, api->flags);
stream_putc(s, api->message);
stream_putw(s, api->safi);
/* Put prefix information. */
psize = PSIZE(p->prefixlen);
stream_putc(s, p->prefixlen);
stream_write(s, (u_char *)&p->prefix, psize);
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_SRCPFX)) {
psize = PSIZE(src_p->prefixlen);
stream_putc(s, src_p->prefixlen);
stream_write(s, (u_char *)&src_p->prefix, psize);
}
/* Nexthop, ifindex, distance and metric information. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_NEXTHOP)) {
stream_putc(s, api->nexthop_num + api->ifindex_num);
for (i = 0; i < api->nexthop_num; i++) {
stream_putc(s, NEXTHOP_TYPE_IPV6);
stream_write(s, (u_char *)api->nexthop[i], 16);
/* For labeled-unicast, each nexthop is followed by
* label. */
if (CHECK_FLAG(api->message, ZAPI_MESSAGE_LABEL))
stream_putl(s, api->label[i]);
}
for (i = 0; i < api->ifindex_num; i++) {
stream_putc(s, NEXTHOP_TYPE_IFINDEX);
stream_putl(s, api->ifindex[i]);
}
}
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);
/* Put length at the first point of the stream. */
stream_putw_at(s, 0, stream_get_endp(s));
return zclient_send_message(zclient);
}
int zclient_route_send(u_char cmd, struct zclient *zclient,
struct zapi_route *api)
{
if (zapi_route_encode(cmd, zclient->obuf, api) < 0)
return -1;
return zclient_send_message(zclient);
}
int zapi_route_encode(u_char 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);
stream_putc(s, api->type);
stream_putw(s, api->instance);
stream_putl(s, api->flags);
stream_putc(s, api->message);
stream_putc(s, api->safi);
if (CHECK_FLAG(api->flags, ZEBRA_FLAG_EVPN_ROUTE))
stream_put(s, &(api->rmac), sizeof(struct ethaddr));
/* Put prefix information. */
stream_putc(s, api->prefix.family);
psize = PSIZE(api->prefix.prefixlen);
stream_putc(s, api->prefix.prefixlen);
stream_write(s, (u_char *)&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, (u_char *)&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));
zlog_warn(
"%s: prefix %s: can't encode %u nexthops "
"(maximum is %u)",
__func__, buf, api->nexthop_num, MULTIPATH_NUM);
return -1;
}
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);
switch (api_nh->type) {
case NEXTHOP_TYPE_BLACKHOLE: