--- /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.
+ */
+/*
+ * snap.h: SNAP definitions
+ *
+ * Copyright (c) 2008 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.
+ */
+
+#ifndef included_snap_h
+#define included_snap_h
+
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+
+#define foreach_ieee_oui \
+ _ (0x000000, ethernet) \
+ _ (0x00000c, cisco)
+
+typedef enum
+{
+#define _(n,f) IEEE_OUI_##f = n,
+ foreach_ieee_oui
+#undef _
+} ieee_oui_t;
+
+#define foreach_snap_cisco_protocol \
+ _ (0x0102, drip) \
+ _ (0x0104, port_aggregation_protocol) \
+ _ (0x0105, mls_hello) \
+ _ (0x010b, per_vlan_spanning_tree) \
+ _ (0x010c, vlan_bridge) \
+ _ (0x0111, unidirectional_link_detection) \
+ _ (0x2000, cdp) \
+ _ (0x2001, cgmp) \
+ _ (0x2003, vtp) \
+ _ (0x2004, dtp) \
+ _ (0x200a, stp_uplink_fast)
+
+typedef enum
+{
+#define _(n,f) SNAP_cisco_##f = n,
+ foreach_snap_cisco_protocol
+#undef _
+} snap_cisco_protocol_t;
+
+typedef union
+{
+ /* *INDENT-OFF* */
+ CLIB_PACKED (struct {
+ /* OUI: organization unique identifier. */
+ u8 oui[3];
+
+ /* Per-OUI protocol. */
+ u16 protocol;
+ });
+ /* *INDENT-ON* */
+
+ u8 as_u8[5];
+} snap_header_t;
+
+typedef struct
+{
+ u32 oui;
+ u32 protocol;
+} snap_oui_and_protocol_t;
+
+typedef struct
+{
+ /* Name vector string. */
+ u8 *name;
+
+ snap_oui_and_protocol_t oui_and_protocol;
+
+ /* Node which handles this type. */
+ u32 node_index;
+
+ /* snap-input next index for this type. */
+ u32 next_index;
+} snap_protocol_info_t;
+
+always_inline void
+snap_header_set_protocol (snap_header_t * h, snap_oui_and_protocol_t * p)
+{
+ u16 protocol = p->protocol;
+ u32 oui = p->oui;
+ h->protocol = clib_host_to_net_u16 (protocol);
+ h->oui[0] = (oui >> 16) & 0xff;
+ h->oui[1] = (oui >> 8) & 0xff;
+ h->oui[2] = (oui >> 0) & 0xff;
+}
+
+#define foreach_snap_error \
+ _ (NONE, "no error") \
+ _ (UNKNOWN_PROTOCOL, "unknown oui/snap protocol")
+
+typedef enum
+{
+#define _(f,s) SNAP_ERROR_##f,
+ foreach_snap_error
+#undef _
+ SNAP_N_ERROR,
+} snap_error_t;
+
+typedef struct
+{
+ vlib_main_t *vlib_main;
+
+ /* Vector of known SNAP oui/protocol pairs. */
+ snap_protocol_info_t *protocols;
+
+ /* Hash table mapping oui/protocol to protocol index. */
+ mhash_t protocol_hash;
+
+ /* Hash table mapping protocol by name. */
+ uword *protocol_info_by_name;
+} snap_main_t;
+
+always_inline u32
+snap_header_get_oui (snap_header_t * h)
+{
+ return (h->oui[0] << 16) | (h->oui[1] << 8) | h->oui[2];
+}
+
+always_inline snap_protocol_info_t *
+snap_get_protocol_info (snap_main_t * sm, snap_header_t * h)
+{
+ snap_oui_and_protocol_t key;
+ uword *p;
+
+ key.oui = snap_header_get_oui (h);
+ key.protocol = h->protocol;
+
+ p = mhash_get (&sm->protocol_hash, &key);
+ return p ? vec_elt_at_index (sm->protocols, p[0]) : 0;
+}
+
+snap_main_t snap_main;
+
+/* Register given node index to take input for given snap type. */
+void
+snap_register_input_protocol (vlib_main_t * vm,
+ char *name,
+ u32 ieee_oui, u16 protocol, u32 node_index);
+
+void snap_set_adjacency (vnet_rewrite_header_t * rw,
+ uword max_data_bytes, u32 ieee_oui, u16 protocol);
+
+format_function_t format_snap_protocol;
+format_function_t format_snap_header;
+format_function_t format_snap_header_with_length;
+
+/* Parse snap protocol as 0xXXXX or protocol name. */
+unformat_function_t unformat_snap_protocol;
+
+/* Parse snap header. */
+unformat_function_t unformat_snap_header;
+unformat_function_t unformat_pg_snap_header;
+
+always_inline void
+snap_setup_node (vlib_main_t * vm, u32 node_index)
+{
+ vlib_node_t *n = vlib_get_node (vm, node_index);
+ pg_node_t *pn = pg_get_node (node_index);
+
+ n->format_buffer = format_snap_header_with_length;
+ n->unformat_buffer = unformat_snap_header;
+ pn->unformat_edit = unformat_pg_snap_header;
+}
+
+#endif /* included_snap_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff