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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.
*/
/*
*------------------------------------------------------------------
* am.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-am/am.h>
unsigned char function_name[] = "SRv6-AM-plugin";
unsigned char keyword_str[] = "End.AM";
unsigned char def_str[] = "Endpoint to SR-unaware appliance via masquerading";
unsigned char params_str[] = "nh <next-hop> oif <iface-out> iif <iface-in>";
/*****************************************/
/* SRv6 LocalSID instantiation and removal functions */
static int
srv6_am_localsid_creation_fn (ip6_sr_localsid_t * localsid)
{
srv6_am_main_t *sm = &srv6_am_main;
srv6_am_localsid_t *ls_mem = localsid->plugin_mem;
adj_index_t nh_adj_index = ADJ_INDEX_INVALID;
/* Step 1: Prepare xconnect adjacency for sending packets to the VNF */
/* Retrieve the adjacency corresponding to the (OIF, next_hop) */
nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
VNET_LINK_IP6, &ls_mem->nh_addr,
ls_mem->sw_if_index_out);
if (nh_adj_index == ADJ_INDEX_INVALID)
return -5;
localsid->nh_adj = nh_adj_index;
/* Step 2: Prepare inbound policy for packets returning from the VNF */
/* Sanitise the SW_IF_INDEX */
if (pool_is_free_index (sm->vnet_main->interface_main.sw_interfaces,
ls_mem->sw_if_index_in))
return -3;
vnet_sw_interface_t *sw = vnet_get_sw_interface (sm->vnet_main,
ls_mem->sw_if_index_in);
if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
return -3;
int ret = vnet_feature_enable_disable ("ip6-unicast", "srv6-am-rewrite",
ls_mem->sw_if_index_in, 1, 0, 0);
if (ret != 0)
return -1;
return 0;
}
static int
srv6_am_localsid_removal_fn (ip6_sr_localsid_t * localsid)
{
srv6_am_localsid_t *ls_mem = localsid->plugin_mem;
/* Remove hardware indirection (from sr_steering.c:137) */
int ret = vnet_feature_enable_disable ("ip6-unicast", "srv6-am-rewrite",
ls_mem->sw_if_index_in, 0, 0, 0);
if (ret != 0)
return -1;
/* Unlock (OIF, NHOP) adjacency (from sr_localsid.c:103) */
adj_unlock (localsid->nh_adj);
/* 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_am_localsid (u8 * s, va_list * args)
{
srv6_am_localsid_t *ls_mem = va_arg (*args, void *);
vnet_main_t *vnm = vnet_get_main ();
return (format (s,
"Next-hop:\t%U\n"
"\tOutgoing iface: %U\n"
"\tIncoming iface: %U",
format_ip6_address, &ls_mem->nh_addr.ip6,
format_vnet_sw_if_index_name, vnm, ls_mem->sw_if_index_out,
format_vnet_sw_if_index_name, vnm, ls_mem->sw_if_index_in));
}
/*
* 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_am_localsid (unformat_input_t * input, va_list * args)
{
void **plugin_mem_p = va_arg (*args, void **);
srv6_am_localsid_t *ls_mem;
vnet_main_t *vnm = vnet_get_main ();
ip46_address_t nh_addr;
u32 sw_if_index_out;
u32 sw_if_index_in;
if (unformat (input, "end.am nh %U oif %U iif %U",
unformat_ip6_address, &nh_addr.ip6,
unformat_vnet_sw_interface, vnm, &sw_if_index_out,
unformat_vnet_sw_interface, vnm, &sw_if_index_in))
{
/* 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);
/* Our brand-new car is ready */
clib_memcpy (&ls_mem->nh_addr.ip6, &nh_addr.ip6,
sizeof (ip6_address_t));
ls_mem->sw_if_index_out = sw_if_index_out;
ls_mem->sw_if_index_in = sw_if_index_in;
/* 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_am_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: dynamic_proxy_index:[%u]", index));
}
void
srv6_am_dpo_lock (dpo_id_t * dpo)
{
}
void
srv6_am_dpo_unlock (dpo_id_t * dpo)
{
}
const static dpo_vft_t srv6_am_vft = {
.dv_lock = srv6_am_dpo_lock,
.dv_unlock = srv6_am_dpo_unlock,
.dv_format = format_srv6_am_dpo,
};
const static char *const srv6_am_ip6_nodes[] = {
"srv6-am-localsid",
NULL,
};
const static char *const *const srv6_am_nodes[DPO_PROTO_NUM] = {
[DPO_PROTO_IP6] = srv6_am_ip6_nodes,
};
/**********************/
static clib_error_t *
srv6_am_init (vlib_main_t * vm)
{
srv6_am_main_t *sm = &srv6_am_main;
int rv = 0;
sm->vlib_main = vm;
sm->vnet_main = vnet_get_main ();
/* Create DPO */
sm->srv6_am_dpo_type = dpo_register_new_type (&srv6_am_vft, srv6_am_nodes);
/* Register SRv6 LocalSID */
rv = sr_localsid_register_function (vm,
function_name,
keyword_str,
def_str,
params_str,
&sm->srv6_am_dpo_type,
format_srv6_am_localsid,
unformat_srv6_am_localsid,
srv6_am_localsid_creation_fn,
srv6_am_localsid_removal_fn);
if (rv < 0)
clib_error_return (0, "SRv6 LocalSID function could n
}
/*
* 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.
*/
/*
* node.c: VLIB processing nodes
*
* Copyright (c) 2008 Eliot Dresselhaus
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Softwa
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