diff options
Diffstat (limited to 'src/vnet/osi/osi.c')
| -rw-r--r-- | src/vnet/osi/osi.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/vnet/osi/osi.c b/src/vnet/osi/osi.c new file mode 100644 index 00000000000..34c867f1bf5 --- /dev/null +++ b/src/vnet/osi/osi.c @@ -0,0 +1,201 @@ +/* + * 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: + */ |