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/*
*------------------------------------------------------------------
* Copyright (c) 2018 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 <vlib/vlib.h>
#include <vnet/mfib/mfib_entry.h>
#include <vnet/mfib/mfib_table.h>
#include <igmp/igmp_proxy.h>
#include <igmp/igmp.h>
#include <igmp/igmp_pkt.h>
void
igmp_proxy_device_mfib_path_add_del (igmp_group_t * group, u8 add)
{
igmp_config_t *config;
u32 mfib_index;
config = igmp_config_get (group->config);
mfib_index =
mfib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
config->sw_if_index);
mfib_prefix_t mpfx_group_addr = {
.fp_proto = FIB_PROTOCOL_IP4,
.fp_len = 32,
.fp_grp_addr = {
.ip4 = (*group->key).ip4,
},
};
fib_route_path_t via_itf_path =
{
.frp_proto = fib_proto_to_dpo (FIB_PROTOCOL_IP4),
.frp_addr = zero_addr,
.frp_sw_if_index = config->sw_if_index,
.frp_fib_index = 0,
.frp_weight = 1,
.frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
};
if (add)
mfib_table_entry_path_update (mfib_index, &mpfx_group_addr,
MFIB_SOURCE_IGMP, MFIB_ENTRY_FLAG_NONE,
&via_itf_path);
else
mfib_table_entry_path_remove (mfib_index, &mpfx_group_addr,
MFIB_SOURCE_IGMP, &via_itf_path);
}
igmp_proxy_device_t *
igmp_proxy_device_lookup (u32 vrf_id)
{
igmp_main_t *im = &igmp_main;
if (vec_len (im->igmp_proxy_device_by_vrf_id) > vrf_id)
{
u32 index;
index = im->igmp_proxy_device_by_vrf_id[vrf_id];
if (index != ~0)
return (vec_elt_at_index (im->proxy_devices, index));
}
return NULL;
}
int
igmp_proxy_device_add_del (u32 vrf_id, u32 sw_if_index, u8 add)
{
igmp_main_t *im = &igmp_main;
igmp_proxy_device_t *proxy_device;
igmp_config_t *config;
u32 mfib_index;
/* check VRF id */
mfib_index =
mfib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index);
if (mfib_index == ~0)
return VNET_API_ERROR_INVALID_INTERFACE;
if (vrf_id != mfib_table_get (mfib_index, FIB_PROTOCOL_IP4)->mft_table_id)
return VNET_API_ERROR_INVALID_INTERFACE;
/* check IGMP configuration */
config = igmp_config_lookup (sw_if_index);
if (!config)
return VNET_API_ERROR_INVALID_INTERFACE;
if (config->mode != IGMP_MODE_HOST)
return VNET_API_ERROR_INVALID_INTERFACE;
proxy_device = igmp_proxy_device_lookup (vrf_id);
if (!proxy_device && add)
{
vec_validate_init_empty (im->igmp_proxy_device_by_vrf_id, vrf_id, ~0);
pool_get (im->proxy_devices, proxy_device);
im->igmp_proxy_device_by_vrf_id[vrf_id] =
proxy_device - im->proxy_devices;
clib_memset (proxy_device, 0, sizeof (igmp_proxy_device_t));
proxy_device->vrf_id = vrf_id;
proxy_device->upstream_if = sw_if_index;
config->proxy_device_id = vrf_id;
/* lock mfib table */
mfib_table_lock (mfib_index, FIB_PROTOCOL_IP4, MFIB_SOURCE_IGMP);
}
else if (proxy_device && !add)
{
while (vec_len (proxy_device->downstream_ifs) > 0)
{
igmp_proxy_device_add_del_interface (vrf_id,
proxy_device->downstream_ifs
[0], 0);
}
vec_free (proxy_device->downstream_ifs);
proxy_device->downstream_ifs = NULL;
im->igmp_proxy_device_by_vrf_id[vrf_id] = ~0;
pool_put (im->proxy_devices, proxy_device);
config->proxy_device_id = ~0;
/* clear proxy database */
igmp_clear_config (config);
/* unlock mfib table */
mfib_table_unlock (mfib_index, FIB_PROTOCOL_IP4, MFIB_SOURCE_IGMP);
}
else
return -1;
return 0;
}
int
igmp_proxy_device_add_del_interface (u32 vrf_id, u32 sw_if_index, u8 add)
{
igmp_proxy_device_t *proxy_device;
u32 index;
u32 mfib_index;
proxy_device = igmp_proxy_device_lookup (vrf_id);
if (!proxy_device)
return -1;
/* check VRF id */
mfib_index =
mfib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index);
if (mfib_index == ~0)
return VNET_API_ERROR_INVALID_INTERFACE;
if (vrf_id != mfib_table_get (mfib_index, FIB_PROTOCOL_IP4)->mft_table_id)
return VNET_API_ERROR_INVALID_INTERFACE;
/* check IGMP configuration */
igmp_config_t *config;
config = igmp_config_lookup (sw_if_index);
if (!config)
return VNET_API_ERROR_INVALID_INTERFACE;
if (config->mode != IGMP_MODE_ROUTER)
return VNET_API_ERROR_INVALID_INTERFACE;
if (add)
{
if (proxy_device->downstream_ifs)
{
index = vec_search (proxy_device->downstream_ifs, sw_if_index);
if (index != ~0)
return -1;
}
vec_add1 (proxy_device->downstream_ifs, sw_if_index);
config->proxy_device_id = vrf_id;
}
else
{
if (!proxy_device->downstream_ifs)
return -2;
index = vec_search (proxy_device->downstream_ifs, sw_if_index);
if (index == ~0)
return -3;
/* remove (S,G)s belonging to this interface from proxy database */
igmp_proxy_device_merge_config (config, /* block */ 1);
vec_del1 (proxy_device->downstream_ifs, index);
config->proxy_device_id = ~0;
}
return 0;
}
void
igmp_proxy_device_block_src (igmp_config_t * config, igmp_group_t * group,
igmp_src_t * src)
{
igmp_proxy_device_t *proxy_device;
igmp_config_t *proxy_config;
igmp_group_t *proxy_group;
igmp_src_t *proxy_src;
u8 *ref;
proxy_device = igmp_proxy_device_lookup (config->proxy_device_id);
if (!proxy_device)
return;
proxy_config = igmp_config_lookup (proxy_device->upstream_if);
ASSERT (proxy_config);
proxy_group = igmp_group_lookup (proxy_config, group->key);
if (proxy_group == NULL)
return;
proxy_src = igmp_src_lookup (proxy_group, src->key);
if (proxy_src == NULL)
return;
if (vec_len (proxy_src->referance_by_config_index) <= group->config)
{
IGMP_DBG ("proxy block src: invalid config %u", group->config);
return;
}
proxy_src->referance_by_config_index[group->config] = 0;
vec_foreach (ref, proxy_src->referance_by_config_index)
{
if ((*ref) > 0)
return;
}
/* build "Block Old Sources" report */
igmp_pkt_build_report_t br;
ip46_address_t *srcaddrs = NULL;
igmp_pkt_build_report_init (&br, proxy_config->sw_if_index);
vec_add1 (srcaddrs, *proxy_src->key);
igmp_pkt_report_v3_add_report (&br, proxy_group->key, srcaddrs,
IGMP_MEMBERSHIP_GROUP_block_old_sources);
igmp_pkt_report_v3_send (&br);
igmp_group_src_remove (proxy_group, proxy_src);
igmp_src_free (proxy_src);
if (igmp_group_n_srcs (proxy_group, IGMP_FILTER_MODE_INCLUDE) == 0)
{
igmp_proxy_device_mfib_path_add_del (proxy_group, 0);
igmp_proxy_device_mfib_path_add_del (group, 0);
igmp_group_clear (&proxy_group);
}
}
always_inline void
igmp_proxy_device_merge_src (igmp_group_t ** proxy_group, igmp_src_t * src,
ip46_address_t ** srcaddrs, u8 block)
{
igmp_src_t *proxy_src;
u32 d_config;
proxy_src = igmp_src_lookup (*proxy_group, src->key);
if (proxy_src == NULL)
{
if (block)
return;
/* store downstream config index */
d_config = igmp_group_get (src->group)->config;
proxy_src =
igmp_src_alloc (igmp_group_index (*proxy_group), src->key,
IGMP_MODE_HOST);
hash_set_mem ((*proxy_group)->igmp_src_by_key
[(*proxy_group)->router_filter_mode], proxy_src->key,
igmp_src_index (proxy_src));
vec_validate_init_empty (proxy_src->referance_by_config_index, d_config,
0);
proxy_src->referance_by_config_index[d_config] = 1;
vec_add1 (*srcaddrs, *proxy_src->key);
}
else
{
if (block)
{
d_config = igmp_group_get (src->group)->config;
if (vec_len (proxy_src->referance_by_config_index) <= d_config)
{
IGMP_DBG ("proxy block src: invalid config %u", d_config);
return;
}
proxy_src->referance_by_config_index[d_config] = 0;
u8 *ref;
vec_foreach (ref, proxy_src->referance_by_config_index)
{
if ((*ref) > 0)
return;
}
vec_add1 (*srcaddrs, *proxy_src->key);
igmp_group_src_remove (*proxy_group, proxy_src);
igmp_src_free (proxy_src);
if (igmp_group_n_srcs (*proxy_group, IGMP_FILTER_MODE_INCLUDE) == 0)
{
igmp_proxy_device_mfib_path_add_del (*proxy_group, 0);
igmp_group_clear (proxy_group);
}
return;
}
d_config = igmp_group_get (src->group)->config;
vec_validate (proxy_src->referance_by_config_index, d_config);
proxy_src->referance_by_config_index[d_config] = 1;
return;
}
}
always_inline igmp_group_t *
igmp_proxy_device_merge_group (igmp_proxy_device_t * proxy_device,
igmp_group_t * group,
ip46_address_t ** srcaddrs, u8 block)
{
igmp_config_t *proxy_config;
igmp_group_t *proxy_group;
igmp_src_t *src;
proxy_config = igmp_config_lookup (proxy_device->upstream_if);
ALWAYS_ASSERT (proxy_config);
proxy_group = igmp_group_lookup (proxy_config, group->key);
if (!proxy_group)
{
if (block)
return NULL;
u32 tmp = igmp_group_index (group);
proxy_group =
igmp_group_alloc (proxy_config, group->key,
group->router_filter_mode);
igmp_proxy_device_mfib_path_add_del (proxy_group, 1);
group = igmp_group_get (tmp);
}
if (block)
{
igmp_proxy_device_mfib_path_add_del (group, 0);
}
FOR_EACH_SRC (src, group, group->router_filter_mode,
({
igmp_proxy_device_merge_src (&proxy_group, src, srcaddrs, block);
}));
return proxy_group;
}
void
igmp_proxy_device_merge_config (igmp_config_t * config, u8 block)
{
igmp_proxy_device_t *proxy_device;
igmp_group_t *group;
igmp_group_t *proxy_group;
ip46_address_t *srcaddrs = NULL;
igmp_pkt_build_report_t br;
proxy_device = igmp_proxy_device_lookup (config->proxy_device_id);
if (!proxy_device)
return;
igmp_pkt_build_report_init (&br, proxy_device->upstream_if);
FOR_EACH_GROUP(group, config,
({
proxy_group = igmp_proxy_device_merge_group (proxy_device, group, &srcaddrs, block);
if ((vec_len(srcaddrs) > 0) && proxy_group)
{
igmp_pkt_report_v3_add_report (&br, proxy_group->key, srcaddrs,
block ? IGMP_MEMBERSHIP_GROUP_block_old_sources :
IGMP_MEMBERSHIP_GROUP_allow_new_sources);
}
vec_free (srcaddrs);
}));
igmp_pkt_report_v3_send (&br);
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
