/*
* 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.
*/
/**
* @brief
* The data-path object representing l3_proxying the packet, i.e. it's for-us
*/
#include <vlib/vlib.h>
#include <vnet/ip/ip.h>
#include <vnet/dpo/l3_proxy_dpo.h>
/**
* @brief pool of all l3_proxy DPOs
*/
l3_proxy_dpo_t *l3_proxy_dpo_pool;
static l3_proxy_dpo_t *
l3_proxy_dpo_alloc (void)
{
l3_proxy_dpo_t *l3p;
pool_get_aligned(l3_proxy_dpo_pool, l3p, CLIB_CACHE_LINE_BYTES);
memset(l3p, 0, sizeof(*l3p));
return (l3p);
}
static l3_proxy_dpo_t *
l3_proxy_dpo_get_from_dpo (const dpo_id_t *dpo)
{
ASSERT(DPO_L3_PROXY == dpo->dpoi_type);
return (l3_proxy_dpo_get(dpo->dpoi_index));
}
/*
* l3_proxy_dpo_add_or_lock
*
* The next_hop address here is used for source address selection in the DP.
* The local adj is added to an interface's l3_proxy prefix, the next-hop
* passed here is the local prefix on the same interface.
*/
void
l3_proxy_dpo_add_or_lock (dpo_proto_t proto,
u32 sw_if_index,
dpo_id_t *dpo)
{
l3_proxy_dpo_t *l3p;
l3p = l3_proxy_dpo_alloc();
l3p->l3p_sw_if_index = sw_if_index;
dpo_set(dpo, DPO_L3_PROXY, proto, (l3p - l3_proxy_dpo_pool));
}
static void
l3_proxy_dpo_lock (dpo_id_t *dpo)
{
l3_proxy_dpo_t *l3p;
l3p = l3_proxy_dpo_get_from_dpo(dpo);
l3p->l3p_locks++;
}
static void
l3_proxy_dpo_unlock (dpo_id_t *dpo)
{
l3_proxy_dpo_t *l3p;
l3p = l3_proxy_dpo_get_from_dpo(dpo);
l3p->l3p_locks--;
if (0 == l3p->l3p_locks)
{
pool_put(l3_proxy_dpo_pool, l3p);
}
}
static u32
l3_proxy_dpo_get_urpf (const dpo_id_t *dpo)
{
l3_proxy_dpo_t *l3p;
l3p = l3_proxy_dpo_get_from_dpo(dpo);
return (l3p->l3p_sw_if_index);
}
static u8*
format_l3_proxy_dpo (u8 *s, va_list *ap)
{
CLIB_UNUSED(index_t index) = va_arg(*ap, index_t);
CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
vnet_main_t * vnm = vnet_get_main();
l3_proxy_dpo_t *l3p;
if (pool_is_free_index(l3_proxy_dpo_pool, index))
{
return (format(s, "dpo-l3_proxy DELETED"));
}
l3p = l3_proxy_dpo_get(index);
if (~0 != l3p->l3p_sw_if_index)
{
return (format(s, "dpo-l3_proxy: %U",
format_vnet_sw_interface_name, vnm,
vnet_get_sw_interface(vnm, l3p->l3p_sw_if_index)));
}
else
{
return (format(s, "dpo-l3-proxy"));
}
}
static void
l3_proxy_dpo_mem_show (void)
{
fib_show_memory_usage("L3 Proxy",
pool_elts(l3_proxy_dpo_pool),
pool_len(l3_proxy_dpo_pool),
sizeof(l3_proxy_dpo_t));
}
const static dpo_vft_t l3_proxy_vft = {
.dv_lock = l3_proxy_dpo_lock,
.dv_unlock = l3_proxy_dpo_unlock,
.dv_format = format_l3_proxy_dpo,
.dv_get_urpf = l3_proxy_dpo_get_urpf,
.dv_mem_show = l3_proxy_dpo_mem_show,
};
/**
* @brief The per-protocol VLIB graph nodes that are assigned to a l3_proxy
* object.
*
* this means that these graph nodes are ones from which a l3_proxy is the
* parent object in the DPO-graph.
*/
const static char* const l3_proxy_ip4_nodes[] =
{
"ip4-local",
NULL,
};
const static char* const l3_proxy_ip6_nodes[] =
{
"ip6-local",
NULL,
};
const static char* const * const l3_proxy_nodes[DPO_PROTO_NUM] =
{
[DPO_PROTO_IP4] = l3_proxy_ip4_nodes,
[DPO_PROTO_IP6] = l3_proxy_ip6_nodes,
[DPO_PROTO_MPLS] = NULL,
};
void
l3_proxy_dpo_module_init (void)
{
dpo_register(DPO_L3_PROXY, &l3_proxy_vft, l3_proxy_nodes);
}
