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/*
* Copyright (c) 2015 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.
*/
/*
*------------------------------------------------------------------
* un.c - SRv6 Masquerading Proxy (AM) function
*------------------------------------------------------------------
*/
#include <vnet/vnet.h>
#include <vnet/adj/adj.h>
#include <vnet/plugin/plugin.h>
#include <vpp/app/version.h>
#include <srv6-un/un.h>
unsigned char function_name[] = "SRv6-uN";
unsigned char keyword_str[] = "uN(32b+16b)";
unsigned char def_str[] = "SRv6 uSID uN";
unsigned char params_str[] = "";
u8 prefix_length = 48;
srv6_un_main_t srv6_un_main;
/*****************************************/
/* SRv6 LocalSID instantiation and removal functions */
static int
srv6_un_localsid_creation_fn (ip6_sr_localsid_t * localsid)
{
srv6_un_localsid_t *ls_mem = localsid->plugin_mem;
//Nothing to do here.
ls_mem->shift = 16;
return 0;
}
static int
srv6_un_localsid_removal_fn (ip6_sr_localsid_t * localsid)
{
//Nothing to do here.
/* Clean up local SID memory */
clib_mem_free (localsid->plugin_mem);
return 0;
}
/**********************************/
/* SRv6 LocalSID format functions */
/*
* Prints nicely the parameters of a localsid
* Example: print "Table 5"
*/
u8 *
format_srv6_un_localsid (u8 * s, va_list * args)
{
srv6_un_localsid_t *ls_mem = va_arg (*args, void *);
return (format (s, "Shift:\t\t%u", ls_mem->shift));
}
/*
* Process the parameters of a localsid
* Example: process from:
* sr localsid address cafe::1 behavior new_srv6_localsid 5
* everything from behavior on... so in this case 'new_srv6_localsid 5'
* Notice that it MUST match the keyword_str and params_str defined above.
*/
uword
unformat_srv6_un_localsid (unformat_input_t * input, va_list * args)
{
void **plugin_mem_p = va_arg (*args, void **);
srv6_un_localsid_t *ls_mem;
if (unformat (input, "uN(32b+16b)"))
{
/* Allocate a portion of memory */
ls_mem = clib_mem_alloc_aligned_at_offset (sizeof *ls_mem, 0, 0, 1);
/* Set to zero the memory */
clib_memset (ls_mem, 0, sizeof *ls_mem);
/* Dont forget to add it to the localsid */
*plugin_mem_p = ls_mem;
return 1;
}
return 0;
}
/*************************/
/* SRv6 LocalSID FIB DPO */
static u8 *
format_srv6_un_dpo (u8 * s, va_list * args)
{
index_t index = va_arg (*args, index_t);
CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
return (format (s, "SR: shift-and-forward 16b:[%u]", index));
}
void
srv6_un_dpo_lock (dpo_id_t * dpo)
{
}
void
srv6_un_dpo_unlock (dpo_id_t * dpo)
{
}
const static dpo_vft_t srv6_un_vft = {
.dv_lock = srv6_un_dpo_lock,
.dv_unlock = srv6_un_dpo_unlock,
.dv_format = format_srv6_un_dpo,
};
const static char *const srv6_un_ip6_nodes[] = {
"srv6-un-localsid",
NULL,
};
const static char *const *const srv6_un_nodes[DPO_PROTO_NUM] = {
[DPO_PROTO_IP6] = srv6_un_ip6_nodes,
};
/**********************/
static clib_error_t *
srv6_un_init (vlib_main_t * vm)
{
srv6_un_main_t *sm = &srv6_un_main;
int rv = 0;
sm->vlib_main = vm;
sm->vnet_main = vnet_get_main ();
/* Create DPO */
sm->srv6_un16_dpo_type =
dpo_register_new_type (&srv6_un_vft, srv6_un_nodes);
/* Register SRv6 LocalSID */
rv = sr_localsid_register_function (vm,
function_name,
keyword_str,
def_str,
params_str,
prefix_length,
&sm->srv6_un16_dpo_type,
format_srv6_un_localsid,
unformat_srv6_un_localsid,
srv6_un_localsid_creation_fn,
srv6_un_localsid_removal_fn);
if (rv < 0)
clib_error_return (0, "SRv6 LocalSID function could not be registered.");
else
sm->srv6_localsid_behavior_id = rv;
return 0;
}
/* *INDENT-OFF* */
VLIB_INIT_FUNCTION (srv6_un_init);
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "Segment Routing Shift And Forward uN 16b",
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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