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/*
*------------------------------------------------------------------
* gre_api.c - gre api
*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*------------------------------------------------------------------
*/
#include <vnet/vnet.h>
#include <vlibmemory/api.h>
#include <vnet/interface.h>
#include <vnet/api_errno.h>
#include <vnet/gre/gre.h>
#include <vnet/fib/fib_table.h>
#include <vnet/vnet_msg_enum.h>
#define vl_typedefs /* define message structures */
#include <vnet/vnet_all_api_h.h>
#undef vl_typedefs
#define vl_endianfun /* define message structures */
#include <vnet/vnet_all_api_h.h>
#undef vl_endianfun
/* instantiate all the print functions we know about */
#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
#define vl_printfun
#include <vnet/vnet_all_api_h.h>
#undef vl_printfun
#include <vlibapi/api_helper_macros.h>
#define foreach_vpe_api_msg \
_(GRE_ADD_DEL_TUNNEL, gre_add_del_tunnel) \
_(GRE_TUNNEL_DUMP, gre_tunnel_dump)
static void vl_api_gre_add_del_tunnel_t_handler
(vl_api_gre_add_del_tunnel_t * mp)
{
vl_api_gre_add_del_tunnel_reply_t *rmp;
int rv = 0;
vnet_gre_add_del_tunnel_args_t _a, *a = &_a;
u32 sw_if_index = ~0;
/* Check src & dst are different */
if ((mp->is_ipv6 && memcmp (mp->src_address, mp->dst_address, 16) == 0) ||
(!mp->is_ipv6 && memcmp (mp->src_address, mp->dst_address, 4) == 0))
{
rv = VNET_API_ERROR_SAME_SRC_DST;
goto out;
}
memset (a, 0, sizeof (*a));
a->is_add = mp->is_add;
a->teb = mp->teb;
a->is_ipv6 = mp->is_ipv6;
/* ip addresses sent in network byte order */
if (!mp->is_ipv6)
{
clib_memcpy (&(a->src.ip4), mp->src_address, 4);
clib_memcpy (&(a->dst.ip4), mp->dst_address, 4);
}
else
{
clib_memcpy (&(a->src.ip6), mp->src_address, 16);
clib_memcpy (&(a->dst.ip6), mp->dst_address, 16);
}
a->outer_fib_id = ntohl (mp->outer_fib_id);
rv = vnet_gre_add_del_tunnel (a, &sw_if_index);
out:
/* *INDENT-OFF* */
REPLY_MACRO2(VL_API_GRE_ADD_DEL_TUNNEL_REPLY,
({
rmp->sw_if_index = ntohl (sw_if_index);
}));
/* *INDENT-ON* */
}
static void send_gre_tunnel_details
(gre_tunnel_t * t, svm_queue_t * q, u32 context)
{
vl_api_gre_tunnel_details_t *rmp;
u8 is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
fib_table_t *ft;
rmp = vl_msg_api_alloc (sizeof (*rmp));
memset (rmp, 0, sizeof (*rmp));
rmp->_vl_msg_id = ntohs (VL_API_GRE_TUNNEL_DETAILS);
if (!is_ipv6)
{
clib_memcpy (rmp->src_address, &(t->tunnel_src.ip4.as_u8), 4);
clib_memcpy (rmp->dst_address, &(t->tunnel_dst.fp_addr.ip4.as_u8), 4);
ft = fib_table_get (t->outer_fib_index, FIB_PROTOCOL_IP4);
rmp->outer_fib_id = ft->ft_table_id;
}
else
{
clib_memcpy (rmp->src_address, &(t->tunnel_src.ip6.as_u8), 16);
clib_memcpy (rmp->dst_address, &(t->tunnel_dst.fp_addr.ip6.as_u8), 16);
ft = fib_table_get (t->outer_fib_index, FIB_PROTOCOL_IP6);
rmp->outer_fib_id = ft->ft_table_id;
}
rmp->teb = (GRE_TUNNEL_TYPE_TEB == t->type);
rmp->sw_if_index = htonl (t->sw_if_index);
rmp->context = context;
rmp->is_ipv6 = is_ipv6;
vl_msg_api_send_shmem (q, (u8 *) & rmp);
}
static void
vl_api_gre_tunnel_dump_t_handler (vl_api_gre_tunnel_dump_t * mp)
{
svm_queue_t *q;
gre_main_t *gm = &gre_main;
gre_tunnel_t *t;
u32 sw_if_index;
q = vl_api_client_index_to_input_queue (mp->client_index);
if (q == 0)
{
return;
}
sw_if_index = ntohl (mp->sw_if_index);
if (~0 == sw_if_index)
{
/* *INDENT-OFF* */
pool_foreach (t, gm->tunnels,
({
send_gre_tunnel_details(t, q, mp->context);
}));
/* *INDENT-ON* */
}
else
{
if ((sw_if_index >= vec_len (gm->tunnel_index_by_sw_if_index)) ||
(~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
{
return;
}
t = &gm->tunnels[gm->tunnel_index_by_sw_if_index[sw_if_index]];
send_gre_tunnel_details (t, q, mp->context);
}
}
/*
* gre_api_hookup
* Add vpe's API message handlers to the table.
* vlib has alread mapped shared memory and
* added the client registration handlers.
* See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
*/
#define vl_msg_name_crc_list
#include <vnet/vnet_all_api_h.h>
#undef vl_msg_name_crc_list
static void
setup_message_id_table (api_main_t * am)
{
#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
foreach_vl_msg_name_crc_gre;
#undef _
}
static clib_error_t *
gre_api_hookup (vlib_main_t * vm)
{
api_main_t *am = &api_main;
#define _(N,n) \
vl_msg_api_set_handlers(VL_API_##N, #n, \
vl_api_##n##_t_handler, \
vl_noop_handler, \
vl_api_##n##_t_endian, \
vl_api_##n##_t_print, \
sizeof(vl_api_##n##_t), 1);
foreach_vpe_api_msg;
#undef _
/*
* Set up the (msg_name, crc, message-id) table
*/
setup_message_id_table (am);
return 0;
}
VLIB_API_INIT_FUNCTION (gre_api_hookup);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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