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/*
* srv6_t_m_gtp4_d.c
*
* Copyright (c) 2019 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/adj/adj.h>
#include <vnet/plugin/plugin.h>
#include <vpp/app/version.h>
#include <srv6-mobile/mobile.h>
srv6_t_main_v4_decap_t srv6_t_main_v4_decap;
static void
clb_dpo_lock_srv6_t_m_gtp4_d (dpo_id_t * dpo)
{
}
static void
clb_dpo_unlock_srv6_t_m_gtp4_d (dpo_id_t * dpo)
{
}
static u8 *
clb_dpo_format_srv6_t_m_gtp4_d (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));
}
const static dpo_vft_t dpo_vft = {
.dv_lock = clb_dpo_lock_srv6_t_m_gtp4_d,
.dv_unlock = clb_dpo_unlock_srv6_t_m_gtp4_d,
.dv_format = clb_dpo_format_srv6_t_m_gtp4_d,
};
const static char *const srv6_t_m_gtp4_d_nodes[] = {
"srv6-t-m-gtp4-d",
NULL,
};
const static char *const srv6_t_m_gtp4_d_v6_nodes[] = {
"error-drop",
NULL,
};
const static char *const *const dpo_nodes[DPO_PROTO_NUM] = {
[DPO_PROTO_IP6] = srv6_t_m_gtp4_d_v6_nodes,
[DPO_PROTO_IP4] = srv6_t_m_gtp4_d_nodes,
};
static u8 fn_name[] = "SRv6-T.M.GTP4.D-plugin";
static u8 keyword_str[] = "t.m.gtp4.d";
static u8 def_str[] =
"Transit function with decapsulation for IPv4/GTP tunnel";
static u8 param_str[] =
"<sr-prefix>/<sr-prefixlen> v6src_prefix <v6src_prefix>/<prefixlen> [nhtype <nhtype>]";
static u8 *
clb_format_srv6_t_m_gtp4_d (u8 * s, va_list * args)
{
srv6_end_gtp4_param_t *ls_mem = va_arg (*args, void *);
s = format (s, "SRv6 T.M.GTP4.D\n\t");
s =
format (s, "SR Prefix: %U/%d, ", format_ip6_address, &ls_mem->sr_prefix,
ls_mem->sr_prefixlen);
s =
format (s, "v6src Prefix: %U/%d", format_ip6_address,
&ls_mem->v6src_prefix, ls_mem->v6src_prefixlen);
if (ls_mem->nhtype != SRV6_NHTYPE_NONE)
{
if (ls_mem->nhtype == SRV6_NHTYPE_IPV4)
s = format (s, ", NHType IPv4\n");
else if (ls_mem->nhtype == SRV6_NHTYPE_IPV6)
s = format (s, ", NHType IPv6\n");
else if (ls_mem->nhtype == SRV6_NHTYPE_NON_IP)
s = format (s, ", NHType Non-IP\n");
else
s = format (s, ", NHType Unknow(%d)\n", ls_mem->nhtype);
}
else
s = format (s, "\n");
return s;
}
static uword
clb_unformat_srv6_t_m_gtp4_d (unformat_input_t * input, va_list * args)
{
void **plugin_mem_p = va_arg (*args, void **);
srv6_end_gtp4_param_t *ls_mem;
ip6_address_t sr_prefix;
u32 sr_prefixlen;
ip6_address_t v6src_prefix;
u32 v6src_prefixlen;
u8 nhtype;
if (unformat (input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype ipv4",
unformat_ip6_address, &sr_prefix, &sr_prefixlen,
unformat_ip6_address, &v6src_prefix, &v6src_prefixlen))
{
nhtype = SRV6_NHTYPE_IPV4;
}
else
if (unformat
(input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype ipv6",
unformat_ip6_address, &sr_prefix, &sr_prefixlen,
unformat_ip6_address, &v6src_prefix, &v6src_prefixlen))
{
nhtype = SRV6_NHTYPE_IPV6;
}
else
if (unformat
(input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype non-ip",
unformat_ip6_address, &sr_prefix, &sr_prefixlen,
unformat_ip6_address, &v6src_prefix, &v6src_prefixlen))
{
nhtype = SRV6_NHTYPE_NON_IP;
}
else if (unformat (input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d",
unformat_ip6_address, &sr_prefix, &sr_prefixlen,
unformat_ip6_address, &v6src_prefix, &v6src_prefixlen))
{
nhtype = SRV6_NHTYPE_NONE;
}
else
{
return 0;
}
ls_mem = clib_mem_alloc_aligned_at_offset (sizeof *ls_mem, 0, 0, 1);
clib_memset (ls_mem, 0, sizeof *ls_mem);
*plugin_mem_p = ls_mem;
ls_mem->sr_prefix = sr_prefix;
ls_mem->sr_prefixlen = sr_prefixlen;
ls_mem->v6src_prefix = v6src_prefix;
ls_mem->v6src_prefixlen = v6src_prefixlen;
ls_mem->nhtype = nhtype;
return 1;
}
static int
clb_creation_srv6_t_m_gtp4_d (ip6_sr_policy_t * sr_policy)
{
return 0;
}
static int
clb_removal_srv6_t_m_gtp4_d (ip6_sr_policy_t * sr_policy)
{
srv6_end_gtp4_param_t *ls_mem;
ls_mem = (srv6_end_gtp4_param_t *) sr_policy->plugin_mem;
clib_mem_free (ls_mem);
return 0;
}
static clib_error_t *
srv6_t_m_gtp4_d_init (vlib_main_t * vm)
{
srv6_t_main_v4_decap_t *sm = &srv6_t_main_v4_decap;
ip6_header_t *ip6;
dpo_type_t dpo_type;
vlib_node_t *node;
u32 rc;
sm->vlib_main = vm;
sm->vnet_main = vnet_get_main ();
node = vlib_get_node_by_name (vm, (u8 *) "srv6-t-m-gtp4-d");
sm->t_m_gtp4_d_node_index = node->index;
node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
sm->error_node_index = node->index;
ip6 = &sm->cache_hdr;
clib_memset_u8 (ip6, 0, sizeof (ip6_header_t));
// IPv6 header (default)
ip6->ip_version_traffic_class_and_flow_label = 0x60;
ip6->hop_limit = 64;
ip6->protocol = IP_PROTOCOL_IPV6;
dpo_type = dpo_register_new_type (&dpo_vft, dpo_nodes);
rc = sr_policy_register_function (vm, fn_name, keyword_str, def_str, param_str, 128, //prefix len
&dpo_type,
clb_format_srv6_t_m_gtp4_d,
clb_unformat_srv6_t_m_gtp4_d,
clb_creation_srv6_t_m_gtp4_d,
clb_removal_srv6_t_m_gtp4_d);
if (rc < 0)
clib_error_return (0, "SRv6 Transit GTP4.D Policy function"
"couldn't be registered");
return 0;
}
/* *INDENT-OFF* */
VNET_FEATURE_INIT (srv6_t_m_gtp4_d, static) =
{
.arc_name = "ip4-unicast",
.node_name = "srv6-t-m-gtp4-d",
.runs_before = 0,
};
VLIB_INIT_FUNCTION (srv6_t_m_gtp4_d_init);
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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