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/*
* 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 <vnet/mfib/mfib_itf.h>
#include <vnet/mfib/mfib_signal.h>
#include <vnet/fib/fib_path.h>
mfib_itf_t *mfib_itf_pool;
index_t
mfib_itf_create (fib_node_index_t path_index,
mfib_itf_flags_t mfi_flags)
{
mfib_itf_t *mfib_itf;
pool_get_aligned(mfib_itf_pool, mfib_itf,
CLIB_CACHE_LINE_BYTES);
mfib_itf->mfi_sw_if_index = fib_path_get_resolving_interface(path_index);
mfib_itf->mfi_si = INDEX_INVALID;
/*
* add the path index to the per-path hash
*/
mfib_itf->mfi_hash = hash_set(mfib_itf->mfi_hash, path_index, mfi_flags);
/*
* the combined flags from all the paths is from just the one contributor
*/
mfib_itf->mfi_flags = mfi_flags;
return (mfib_itf - mfib_itf_pool);
}
static mfib_itf_flags_t
mfib_itf_mk_flags (const mfib_itf_t *mfib_itf)
{
mfib_itf_flags_t combined_flags, flags;
fib_node_index_t *path_index;
combined_flags = MFIB_ITF_FLAG_NONE;
hash_foreach(path_index, flags, mfib_itf->mfi_hash,
{
combined_flags |= flags;
});
return (combined_flags);
}
int
mfib_itf_update (mfib_itf_t *mfib_itf,
fib_node_index_t path_index,
mfib_itf_flags_t mfi_flags)
{
/*
* add or remove the path index to the per-path hash
*/
if (MFIB_ITF_FLAG_NONE == mfi_flags)
{
hash_unset(mfib_itf->mfi_hash, path_index);
}
else
{
mfib_itf->mfi_hash = hash_set(mfib_itf->mfi_hash,
path_index,
mfi_flags);
}
/*
* re-generate the combined flags from all the paths.
*/
mfib_itf->mfi_flags = mfib_itf_mk_flags(mfib_itf);
/*
* The interface can be removed if there are no more flags
*/
return (MFIB_ITF_FLAG_NONE == mfib_itf->mfi_flags);
}
static void
mfib_itf_hash_flush (mfib_itf_t *mfi)
{
fib_node_index_t path_index, *path_indexp, *all = NULL;
mfib_itf_flags_t flags;
hash_foreach(path_index, flags, mfi->mfi_hash,
{
vec_add1(all, path_index);
});
vec_foreach(path_indexp, all)
{
hash_unset(mfi->mfi_hash, *path_indexp);
};
}
static void
mfib_itf_prefix4_to_mac (const mfib_prefix_t *pfx,
mac_address_t *mac)
{
mac->bytes[0] = 0x01;
mac->bytes[1] = 0x0;
mac->bytes[2] = 0x5e;
mac->bytes[3] = pfx->fp_grp_addr.ip4.as_u8[1] & 0x7f;
mac->bytes[4] = pfx->fp_grp_addr.ip4.as_u8[2];
mac->bytes[5] = pfx->fp_grp_addr.ip4.as_u8[3];
}
static void
mfib_itf_prefix6_to_mac (const mfib_prefix_t *pfx,
mac_address_t *mac)
{
mac->bytes[0] = 0x33;
mac->bytes[1] = 0x33;
mac->bytes[2] = pfx->fp_grp_addr.ip6.as_u8[12];
mac->bytes[3] = pfx->fp_grp_addr.ip6.as_u8[13];
mac->bytes[4] = pfx->fp_grp_addr.ip6.as_u8[14];
mac->bytes[5] = pfx->fp_grp_addr.ip6.as_u8[15];
}
static void
mfib_itf_prefix_to_mac (const mfib_prefix_t *pfx,
mac_address_t *mac)
{
switch (pfx->fp_proto)
{
case FIB_PROTOCOL_IP4:
mfib_itf_prefix4_to_mac(pfx, mac);
break;
case FIB_PROTOCOL_IP6:
mfib_itf_prefix6_to_mac(pfx, mac);
break;
case FIB_PROTOCOL_MPLS:
break;
}
}
static void
mfib_itf_mac_add_del (mfib_itf_t *itf,
const mfib_prefix_t *pfx,
int add)
{
vnet_sw_interface_t *si;
vnet_main_t *vnm;
mac_address_t mac;
vnm = vnet_get_main();
mfib_itf_prefix_to_mac(pfx, &mac);
si = vnet_get_sw_interface(vnm, itf->mfi_sw_if_index);
vnet_hw_interface_add_del_mac_address (vnet_get_main(),
si->hw_if_index,
mac.bytes, add);
}
void
mfib_itf_mac_add (mfib_itf_t *itf,
const mfib_prefix_t *pfx)
{
mfib_itf_mac_add_del(itf, pfx, 1);
}
void
mfib_itf_mac_del (mfib_itf_t *itf,
const mfib_prefix_t *pfx)
{
mfib_itf_mac_add_del(itf, pfx, 0);
}
void
mfib_itf_delete (mfib_itf_t *mfi)
{
mfib_itf_hash_flush(mfi);
mfib_signal_remove_itf(mfi);
pool_put(mfib_itf_pool, mfi);
}
u8 *
format_mfib_itf (u8 * s, va_list * args)
{
mfib_itf_t *mfib_itf;
vnet_main_t *vnm;
index_t mfi;
mfi = va_arg (*args, index_t);
vnm = vnet_get_main();
mfib_itf = mfib_itf_get(mfi);
if (~0 != mfib_itf->mfi_sw_if_index)
{
return (format(s, " %U: %U",
format_vnet_sw_interface_name,
vnm,
vnet_get_sw_interface(vnm,
mfib_itf->mfi_sw_if_index),
format_mfib_itf_flags, mfib_itf->mfi_flags));
}
else
{
return (format(s, " local: %U",
format_mfib_itf_flags, mfib_itf->mfi_flags));
}
return (s);
}
static clib_error_t *
show_mfib_itf_command (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
index_t mfii;
if (unformat (input, "%d", &mfii))
{
/*
* show one in detail
*/
if (!pool_is_free_index(mfib_itf_pool, mfii))
{
vlib_cli_output (vm, "%d@%U",
mfii,
format_mfib_itf, mfii);
}
else
{
vlib_cli_output (vm, "itf %d invalid", mfii);
}
}
else
{
/*
* show all
*/
vlib_cli_output (vm, "mFIB interfaces::");
pool_foreach_index(mfii, mfib_itf_pool,
({
vlib_cli_output (vm, "%d@%U",
mfii,
format_mfib_itf, mfii);
}));
}
return (NULL);
}
/*?
* This commnad displays an MFIB interface, or all interfaces, indexed by their unique
* numerical indentifier.
?*/
VLIB_CLI_COMMAND (show_mfib_itf, static) = {
.path = "show mfib interface",
.function = show_mfib_itf_command,
.short_help = "show mfib interface",
};
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