int
zclient_send_linkmetrics_subscribe (struct zclient *zclient, uint16_t cmd)
{
struct stream *s;
if (zclient->sock < 0)
{
zlog_err ("%s: not connected to zebra", __func__);
return -1;
}
s = zclient->obuf;
stream_reset (s);
zclient_create_header (s, cmd);
stream_putw_at (s, 0, stream_get_endp (s));
if (zclient_send_message (zclient))
{
zlog_err ("%s: zclient_send_message() failed", __func__);
return -1;
}
return 0;
}
/*
* "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 flags field has ZEBRA_FLAG_BLACKHOLE or
* ZEBRA_FLAG_REJECT is set then Nexthop count is set to 1, then _no_
* nexthop information is provided, and the message describes a prefix
* to blackhole or reject route.
*
* 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.
*
* 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);
zclient_create_header (s, cmd);
/* Put type and nexthop. */
stream_putc (s, api->type);
stream_putc (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))
{
if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE))
{
stream_putc (s, 1);
stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE);
/* XXX assert(api->nexthop_num == 0); */
/* XXX assert(api->ifindex_num == 0); */
}
else
stream_putc (s, api->nexthop_num + api->ifindex_num);
for (i = 0; i < api->nexthop_num; i++)
{
stream_putc (s, ZEBRA_NEXTHOP_IPV4);
stream_put_in_addr (s, api->nexthop[i]);
}
for (i = 0; i < api->ifindex_num; i++)
{
stream_putc (s, ZEBRA_NEXTHOP_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);
/* Put length at the first point of the stream. */
stream_putw_at (s, 0, stream_get_endp (s));
return zclient_send_message(zclient);
}
/* Send simple Zebra message. */
static int
zebra_message_send (struct zclient *zclient, int command)
{
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);
return zclient_send_message(zclient);
}
/*
* 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, int type)
{
struct stream *s;
s = zclient->obuf;
stream_reset(s);
zclient_create_header (s, command);
stream_putc (s, type);
stream_putw_at (s, 0, stream_get_endp (s));
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);
zclient_create_header (s, ZEBRA_HELLO);
stream_putc (s, zclient->redist_default);
stream_putw_at (s, 0, stream_get_endp (s));
return zclient_send_message(zclient);
}
return 0;
}
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_at (s, 0, stream_get_endp (s));
return zclient_send_message(zclient);
}
return 0;
}
void
ospf_zebra_add (struct prefix_ipv4 *p, struct ospf_route *or)
{
u_char message;
u_char distance;
u_char flags;
int psize;
struct stream *s;
struct ospf_path *path;
struct listnode *node;
if (zclient->redist[ZEBRA_ROUTE_OSPF])
{
message = 0;
flags = 0;
/* OSPF pass nexthop and metric */
SET_FLAG (message, ZAPI_MESSAGE_NEXTHOP);
SET_FLAG (message, ZAPI_MESSAGE_METRIC);
/* Distance value. */
distance = ospf_distance_apply (p, or);
if (distance)
SET_FLAG (message, ZAPI_MESSAGE_DISTANCE);
/* Make packet. */
s = zclient->obuf;
stream_reset (s);
/* Put command, type, flags, message. */
zclient_create_header (s, ZEBRA_IPV4_ROUTE_ADD);
stream_putc (s, ZEBRA_ROUTE_OSPF);
stream_putc (s, flags);
stream_putc (s, message);
stream_putw (s, SAFI_UNICAST);
/* Put prefix information. */
psize = PSIZE (p->prefixlen);
stream_putc (s, p->prefixlen);
stream_write (s, (u_char *) & p->prefix, psize);
/* Nexthop count. */
stream_putc (s, or->paths->count);
/* Nexthop, ifindex, distance and metric information. */
for (ALL_LIST_ELEMENTS_RO (or->paths, node, path))
{
if (path->nexthop.s_addr != INADDR_ANY &&
path->ifindex != 0)
{
stream_putc (s, ZEBRA_NEXTHOP_IPV4_IFINDEX);
stream_put_in_addr (s, &path->nexthop);
stream_putl (s, path->ifindex);
}
else if (path->nexthop.s_addr != INADDR_ANY)
{
stream_putc (s, ZEBRA_NEXTHOP_IPV4);
stream_put_in_addr (s, &path->nexthop);
}
else
{
stream_putc (s, ZEBRA_NEXTHOP_IFINDEX);
if (path->ifindex)
stream_putl (s, path->ifindex);
else
stream_putl (s, 0);
}
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
{
char buf[2][INET_ADDRSTRLEN];
zlog_debug("Zebra: Route add %s/%d nexthop %s",
inet_ntop(AF_INET, &p->prefix,
buf[0], sizeof(buf[0])),
p->prefixlen,
inet_ntop(AF_INET, &path->nexthop,
buf[1], sizeof(buf[1])));
}
}
if (CHECK_FLAG (message, ZAPI_MESSAGE_DISTANCE))
stream_putc (s, distance);
if (CHECK_FLAG (message, ZAPI_MESSAGE_METRIC))
{
if (or->path_type == OSPF_PATH_TYPE1_EXTERNAL)
stream_putl (s, or->cost + or->u.ext.type2_cost);
else if (or->path_type == OSPF_PATH_TYPE2_EXTERNAL)
stream_putl (s, or->u.ext.type2_cost);
else
stream_putl (s, or->cost);
}
stream_putw_at (s, 0, stream_get_endp (s));
zclient_send_message(zclient);
}
static void
isis_zebra_route_add_ipv4 (struct prefix *prefix,
struct isis_route_info *route_info)
{
u_char message, flags;
int psize;
struct stream *stream;
struct isis_nexthop *nexthop;
struct listnode *node;
if (CHECK_FLAG (route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNC))
return;
if (zclient->redist[ZEBRA_ROUTE_ISIS])
{
message = 0;
flags = 0;
SET_FLAG (message, ZAPI_MESSAGE_NEXTHOP);
SET_FLAG (message, ZAPI_MESSAGE_METRIC);
#if 0
SET_FLAG (message, ZAPI_MESSAGE_DISTANCE);
#endif
stream = zclient->obuf;
stream_reset (stream);
zclient_create_header (stream, ZEBRA_IPV4_ROUTE_ADD);
/* type */
stream_putc (stream, ZEBRA_ROUTE_ISIS);
/* flags */
stream_putc (stream, flags);
/* message */
stream_putc (stream, message);
/* prefix information */
psize = PSIZE (prefix->prefixlen);
stream_putc (stream, prefix->prefixlen);
stream_write (stream, (u_char *) & prefix->u.prefix4, psize);
stream_putc (stream, listcount (route_info->nexthops));
/* Nexthop, ifindex, distance and metric information */
for (ALL_LIST_ELEMENTS_RO (route_info->nexthops, node, nexthop))
{
/* FIXME: can it be ? */
if (nexthop->ip.s_addr != INADDR_ANY)
{
stream_putc (stream, ZEBRA_NEXTHOP_IPV4);
stream_put_in_addr (stream, &nexthop->ip);
}
else
{
stream_putc (stream, ZEBRA_NEXTHOP_IFINDEX);
stream_putl (stream, nexthop->ifindex);
}
}
#if 0
if (CHECK_FLAG (message, ZAPI_MESSAGE_DISTANCE))
stream_putc (stream, route_info->depth);
#endif
if (CHECK_FLAG (message, ZAPI_MESSAGE_METRIC))
stream_putl (stream, route_info->cost);
stream_putw_at (stream, 0, stream_get_endp (stream));
zclient_send_message(zclient);
SET_FLAG (route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNC);
}
/*
* "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 flags field has ZEBRA_FLAG_BLACKHOLE or
* ZEBRA_FLAG_REJECT is set then Nexthop count is set to 1, then _no_
* nexthop information is provided, and the message describes a prefix
* to blackhole or reject route.
*
* 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.
*
* 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);
zclient_create_header (s, cmd);
/* Put type and nexthop. */
stream_putc (s, api->type);
stream_putc (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. */
/* ZAPI_MESSAGE_ONLINK implies interleaving */
if (CHECK_FLAG (api->message, ZAPI_MESSAGE_ONLINK))
{
/* ZAPI_MESSAGE_NEXTHOP is required for proper receiving */
assert (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP));
/* 64-bit data units, interleaved between nexthop[] and ifindex[] */
assert (api->nexthop_num == api->ifindex_num);
stream_putc (s, api->nexthop_num * 2);
for (i = 0; i < api->nexthop_num; i++)
{
stream_putc (s, ZEBRA_NEXTHOP_IPV4_ONLINK);
stream_put_in_addr (s, api->nexthop[i]);
stream_putc (s, ZEBRA_NEXTHOP_IFINDEX);
stream_putl (s, api->ifindex[i]);
}
}
else if (CHECK_FLAG (api->message, ZAPI_MESSAGE_NEXTHOP))
{
/* traditional 32-bit data units */
if (CHECK_FLAG (api->flags, ZEBRA_FLAG_BLACKHOLE | ZEBRA_FLAG_REJECT))
{
stream_putc (s, 1);
stream_putc (s, ZEBRA_NEXTHOP_BLACKHOLE);
/* XXX assert(api->nexthop_num == 0); */
/* XXX assert(api->ifindex_num == 0); */
}
else
stream_putc (s, api->nexthop_num + api->ifindex_num);
for (i = 0; i < api->nexthop_num; i++)
{
stream_putc (s, ZEBRA_NEXTHOP_IPV4);
stream_put_in_addr (s, api->nexthop[i]);
}
for (i = 0; i < api->ifindex_num; i++)
{
stream_putc (s, ZEBRA_NEXTHOP_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);
/* Put length at the first point of the stream. */
stream_putw_at (s, 0, stream_get_endp (s));
return zclient_send_message(zclient);
}