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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.
*/
/*
* osi.c: osi support
*
* Copyright (c) 2010 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 Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <vnet/vnet.h>
#include <vnet/osi/osi.h>
/* Global main structure. */
osi_main_t osi_main;
u8 *
format_osi_protocol (u8 * s, va_list * args)
{
osi_protocol_t p = va_arg (*args, u32);
osi_main_t *pm = &osi_main;
osi_protocol_info_t *pi = osi_get_protocol_info (pm, p);
if (pi)
s = format (s, "%s", pi->name);
else
s = format (s, "0x%02x", p);
return s;
}
u8 *
format_osi_header_with_length (u8 * s, va_list * args)
{
osi_main_t *pm = &osi_main;
osi_header_t *h = va_arg (*args, osi_header_t *);
u32 max_header_bytes = va_arg (*args, u32);
osi_protocol_t p = h->protocol;
uword indent, header_bytes;
header_bytes = sizeof (h[0]);
if (max_header_bytes != 0 && header_bytes > max_header_bytes)
return format (s, "osi header truncated");
indent = format_get_indent (s);
s = format (s, "OSI %U", format_osi_protocol, p);
if (max_header_bytes != 0 && header_bytes > max_header_bytes)
{
osi_protocol_info_t *pi = osi_get_protocol_info (pm, p);
vlib_node_t *node = vlib_get_node (pm->vlib_main, pi->node_index);
if (node->format_buffer)
s = format (s, "\n%U%U",
format_white_space, indent,
node->format_buffer, (void *) (h + 1),
max_header_bytes - header_bytes);
}
return s;
}
u8 *
format_osi_header (u8 * s, va_list * args)
{
osi_header_t *h = va_arg (*args, osi_header_t *);
return format (s, "%U", format_osi_header_with_length, h, 0);
}
/* Returns osi protocol as an int in host byte order. */
uword
unformat_osi_protocol (unformat_input_t * input, va_list * args)
{
u8 *result = va_arg (*args, u8 *);
osi_main_t *pm = &osi_main;
int p, i;
/* Numeric type. */
if (unformat (input, "0x%x", &p) || unformat (input, "%d", &p))
{
if (p >= (1 << 8))
return 0;
*result = p;
return 1;
}
/* Named type. */
if (unformat_user (input, unformat_vlib_number_by_name,
pm->protocol_info_by_name, &i))
{
osi_protocol_info_t *pi = vec_elt_at_index (pm->protocol_infos, i);
*result = pi->protocol;
return 1;
}
return 0;
}
uword
unformat_osi_header (unformat_input_t * input, va_list * args)
{
u8 **result = va_arg (*args, u8 **);
osi_header_t _h, *h = &_h;
u8 p;
if (!unformat (input, "%U", unformat_osi_protocol, &p))
return 0;
h->protocol = p;
/* Add header to result. */
{
void *p;
u32 n_bytes = sizeof (h[0]);
vec_add2 (*result, p, n_bytes);
clib_memcpy (p, h, n_bytes);
}
return 1;
}
static void
add_protocol (osi_main_t * pm, osi_protocol_t protocol, char *protocol_name)
{
osi_protocol_info_t *pi;
u32 i;
vec_add2 (pm->protocol_infos, pi, 1);
i = pi - pm->protocol_infos;
pi->name = protocol_name;
pi->protocol = protocol;
pi->next_index = pi->node_index = ~0;
hash_set (pm->protocol_info_by_protocol, protocol, i);
hash_set_mem (pm->protocol_info_by_name, pi->name, i);
}
static clib_error_t *
osi_init (vlib_main_t * vm)
{
clib_error_t *error = 0;
osi_main_t *pm = &osi_main;
/* init order dependency: llc_init -> osi_init */
if ((error = vlib_call_init_function (vm, llc_init)))
return error;
memset (pm, 0, sizeof (pm[0]));
pm->vlib_main = vm;
pm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
pm->protocol_info_by_protocol = hash_create (0, sizeof (uword));
#define _(f,n) add_protocol (pm, OSI_PROTOCOL_##f, #f);
foreach_osi_protocol;
#undef _
return vlib_call_init_function (vm, osi_input_init);
}
VLIB_INIT_FUNCTION (osi_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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