--- /dev/null
+/*
+ * 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.
+ */
+/*
+ * llc.c: llc 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/llc/llc.h>
+
+/* Global main structure. */
+llc_main_t llc_main;
+
+u8 *
+format_llc_protocol (u8 * s, va_list * args)
+{
+ llc_protocol_t p = va_arg (*args, u32);
+ llc_main_t *pm = &llc_main;
+ llc_protocol_info_t *pi = llc_get_protocol_info (pm, p);
+
+ if (pi)
+ s = format (s, "%s", pi->name);
+ else
+ s = format (s, "0x%02x", p);
+
+ return s;
+}
+
+u8 *
+format_llc_header_with_length (u8 * s, va_list * args)
+{
+ llc_main_t *pm = &llc_main;
+ llc_header_t *h = va_arg (*args, llc_header_t *);
+ u32 max_header_bytes = va_arg (*args, u32);
+ llc_protocol_t p = h->dst_sap;
+ uword indent, header_bytes;
+
+ header_bytes = llc_header_length (h);
+ if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+ return format (s, "llc header truncated");
+
+ indent = format_get_indent (s);
+
+ s = format (s, "LLC %U -> %U",
+ format_llc_protocol, h->src_sap,
+ format_llc_protocol, h->dst_sap);
+
+ if (h->control != 0x03)
+ s = format (s, ", control 0x%x", llc_header_get_control (h));
+
+ if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+ {
+ llc_protocol_info_t *pi = llc_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_llc_header (u8 * s, va_list * args)
+{
+ llc_header_t *h = va_arg (*args, llc_header_t *);
+ return format (s, "%U", format_llc_header_with_length, h, 0);
+}
+
+/* Returns llc protocol as an int in host byte order. */
+uword
+unformat_llc_protocol (unformat_input_t * input, va_list * args)
+{
+ u8 *result = va_arg (*args, u8 *);
+ llc_main_t *pm = &llc_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))
+ {
+ llc_protocol_info_t *pi = vec_elt_at_index (pm->protocol_infos, i);
+ *result = pi->protocol;
+ return 1;
+ }
+
+ return 0;
+}
+
+uword
+unformat_llc_header (unformat_input_t * input, va_list * args)
+{
+ u8 **result = va_arg (*args, u8 **);
+ llc_header_t _h, *h = &_h;
+ u8 p;
+
+ if (!unformat (input, "%U", unformat_llc_protocol, &p))
+ return 0;
+
+ h->src_sap = h->dst_sap = p;
+ h->control = 0x3;
+
+ /* 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 u8 *
+llc_build_rewrite (vnet_main_t * vnm,
+ u32 sw_if_index,
+ vnet_link_t link_type, const void *dst_address)
+{
+ llc_header_t *h;
+ u8 *rewrite = NULL;
+ llc_protocol_t protocol;
+
+ switch (link_type)
+ {
+#define _(a,b) case VNET_LINK_##a: protocol = LLC_PROTOCOL_##b; break
+ _(IP4, ip4);
+#undef _
+ default:
+ return (NULL);
+ }
+
+ vec_validate (rewrite, sizeof (*h) - 1);
+ h = (llc_header_t *) rewrite;
+ h->src_sap = h->dst_sap = protocol;
+ h->control = 0x3;
+
+ return (rewrite);
+}
+
+/* *INDENT-OFF* */
+VNET_HW_INTERFACE_CLASS (llc_hw_interface_class) = {
+ .name = "LLC",
+ .format_header = format_llc_header_with_length,
+ .unformat_header = unformat_llc_header,
+ .build_rewrite = llc_build_rewrite,
+};
+/* *INDENT-ON* */
+
+static void
+add_protocol (llc_main_t * pm, llc_protocol_t protocol, char *protocol_name)
+{
+ llc_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 *
+llc_init (vlib_main_t * vm)
+{
+ clib_error_t *error;
+ llc_main_t *pm = &llc_main;
+
+ 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, LLC_PROTOCOL_##f, #f);
+ foreach_llc_protocol;
+#undef _
+
+ if ((error = vlib_call_init_function (vm, snap_init)))
+ return error;
+
+ return vlib_call_init_function (vm, llc_input_init);
+}
+
+VLIB_INIT_FUNCTION (llc_init);
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff