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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.
*/
#ifndef __included_vxlan_gpe_ioam_util_h__
#define __included_vxlan_gpe_ioam_util_h__
#include <vnet/vxlan-gpe/vxlan_gpe.h>
#include <vnet/vxlan-gpe/vxlan_gpe_packet.h>
#include <vnet/ip/ip.h>
typedef struct
{
u32 tunnel_index;
ioam_trace_t fmt_trace;
} vxlan_gpe_ioam_v4_trace_t;
static u8 *
format_vxlan_gpe_ioam_v4_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
vxlan_gpe_ioam_v4_trace_t *t1 = va_arg (*args, vxlan_gpe_ioam_v4_trace_t *);
ioam_trace_t *t = &(t1->fmt_trace);
vxlan_gpe_ioam_option_t *fmt_trace0;
vxlan_gpe_ioam_option_t *opt0, *limit0;
vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
u8 type0;
fmt_trace0 = (vxlan_gpe_ioam_option_t *) t->option_data;
s = format (s, "VXLAN-GPE-IOAM: next_index %d len %d traced %d",
t->next_index, fmt_trace0->length, t->trace_len);
opt0 = (vxlan_gpe_ioam_option_t *) (fmt_trace0 + 1);
limit0 = (vxlan_gpe_ioam_option_t *) ((u8 *) fmt_trace0) + t->trace_len;
while (opt0 < limit0)
{
type0 = opt0->type;
switch (type0)
{
case 0: /* Pad, just stop */
opt0 = (vxlan_gpe_ioam_option_t *) ((u8 *) opt0) + 1;
break;
default:
if (hm->trace[type0])
{
s = (*hm->trace[type0]) (s, opt0);
}
else
{
s =
format (s, "\n unrecognized option %d length %d", type0,
opt0->length);
}
opt0 =
(vxlan_gpe_ioam_option_t *) (((u8 *) opt0) + opt0->length +
sizeof (vxlan_gpe_ioam_option_t));
break;
}
}
s = format (s, "VXLAN-GPE-IOAM: tunnel %d", t1->tunnel_index);
return s;
}
always_inline void
vxlan_gpe_encap_decap_ioam_v4_one_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_buffer_t * b0,
u32 * next0, u32 drop_node_val,
u8 use_adj)
{
ip4_header_t *ip0;
udp_header_t *udp_hdr0;
vxlan_gpe_header_t *gpe_hdr0;
vxlan_gpe_ioam_hdr_t *gpe_ioam0;
vxlan_gpe_ioam_option_t *opt0;
vxlan_gpe_ioam_option_t *limit0;
vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
/* Populate the iOAM header */
ip0 = vlib_buffer_get_current (b0);
udp_hdr0 = (udp_header_t *) (ip0 + 1);
gpe_hdr0 = (vxlan_gpe_header_t *) (udp_hdr0 + 1);
gpe_ioam0 = (vxlan_gpe_ioam_hdr_t *) (gpe_hdr0 + 1);
opt0 = (vxlan_gpe_ioam_option_t *) (gpe_ioam0 + 1);
limit0 = (vxlan_gpe_ioam_option_t *) ((u8 *) gpe_ioam0 + gpe_ioam0->length);
/*
* Basic validity checks
*/
if (gpe_ioam0->length > clib_net_to_host_u16 (ip0->length))
{
*next0 = drop_node_val;
return;
}
/* Scan the set of h-b-h options, process ones that we understand */
while (opt0 < limit0)
{
u8 type0;
type0 = opt0->type;
switch (type0)
{
case 0: /* Pad1 */
opt0 = (vxlan_gpe_ioam_option_t *) ((u8 *) opt0) + 1;
continue;
case 1: /* PadN */
break;
default:
if (hm->options[type0])
{
if ((*hm->options[type0]) (b0, opt0, 1 /* is_ipv4 */ ,
use_adj) < 0)
{
*next0 = drop_node_val;
return;
}
}
break;
}
opt0 =
(vxlan_gpe_ioam_option_t *) (((u8 *) opt0) + opt0->length +
sizeof (vxlan_gpe_ioam_hdr_t));
}
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
vxlan_gpe_ioam_v4_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
u32 trace_len = gpe_ioam0->length;
t->fmt_trace.next_index = *next0;
/* Capture the ioam option verbatim */
trace_len =
trace_len <
ARRAY_LEN (t->fmt_trace.
option_data) ? trace_len : ARRAY_LEN (t->fmt_trace.
option_data);
t->fmt_trace.trace_len = trace_len;
clib_memcpy (&(t->fmt_trace.option_data), gpe_ioam0, trace_len);
}
return;
}
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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