+++ /dev/null
-/*
- * l2_vtr.h : layer 2 vlan tag rewrite processing
- *
- * Copyright (c) 2013 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_vnet_l2_vtr_h
-#define included_vnet_l2_vtr_h
-
-#include <vlib/vlib.h>
-#include <vnet/vnet.h>
-#include <vnet/ethernet/packet.h>
-#include <vnet/l2/l2_vtr.h>
-
-/* VTR config options for API and CLI support */
-typedef enum
-{
- L2_VTR_DISABLED,
- L2_VTR_PUSH_1,
- L2_VTR_PUSH_2,
- L2_VTR_POP_1,
- L2_VTR_POP_2,
- L2_VTR_TRANSLATE_1_1,
- L2_VTR_TRANSLATE_1_2,
- L2_VTR_TRANSLATE_2_1,
- L2_VTR_TRANSLATE_2_2
-} l2_vtr_op_t;
-
-/**
- * Per-interface vlan tag rewrite configuration
- * There will be one instance of this struct for each sw_if_index
- * for both input vtr and output vtr
- */
-typedef struct
-{
- union
- {
- /*
- * Up to two vlan tags to push.
- * if there is only one vlan tag to push, it is in tags[1].
- */
- ethernet_vlan_header_tv_t tags[2];
- u64 raw_tags;
- };
-
- union
- {
- struct
- {
- u8 push_bytes; /* number of bytes to push for up to 2 vlans (0,4,8) */
- u8 pop_bytes; /* number of bytes to pop for up to 2 vlans (0,4,8) */
- };
- u16 push_and_pop_bytes; /* if 0 then the feature is disabled */
- };
-} vtr_config_t;
-
-
-/**
- * Perform the configured tag rewrite on the packet.
- * Return 0 if ok, 1 if packet should be dropped (e.g. tried to pop
- * too many tags)
- */
-always_inline u32
-l2_vtr_process (vlib_buffer_t * b0, vtr_config_t * config)
-{
- u64 temp_8;
- u32 temp_4;
- u8 *eth;
-
- eth = vlib_buffer_get_current (b0);
-
- /* copy the 12B dmac and smac to a temporary location */
- temp_8 = *((u64 *) eth);
- temp_4 = *((u32 *) (eth + 8));
-
- /* adjust for popped tags */
- eth += config->pop_bytes;
-
- /* if not enough tags to pop then drop packet */
- if (PREDICT_FALSE ((vnet_buffer (b0)->l2.l2_len - 12) < config->pop_bytes))
- {
- return 1;
- }
-
- /* copy the 2 new tags to the start of the packet */
- *((u64 *) (eth + 12 - 8)) = config->raw_tags;
-
- /* TODO: set cos bits */
-
- /* adjust for pushed tags: */
- eth -= config->push_bytes;
-
- /* copy the 12 dmac and smac back to the packet */
- *((u64 *) eth) = temp_8;
- *((u32 *) (eth + 8)) = temp_4;
-
- /* Update l2_len */
- vnet_buffer (b0)->l2.l2_len +=
- (word) config->push_bytes - (word) config->pop_bytes;
-
- /* Update vlan tag count */
- ethernet_buffer_adjust_vlan_count_by_bytes (b0,
- (word) config->push_bytes -
- (word) config->pop_bytes);
-
- /* Update packet len */
- vlib_buffer_advance (b0,
- (word) config->pop_bytes - (word) config->push_bytes);
-
- return 0;
-}
-
-
-/*
- * Perform the egress pre-vlan tag rewrite EFP Filter check.
- * The post-vlan tag rewrite check is a separate graph node.
- *
- * This check insures that a packet being output to an interface
- * (before output vtr is performed) has vlan tags that match those
- * on a packet received from that interface (after vtr has been performed).
- * This means verifying that any tags pushed by input vtr are present
- * on the packet.
- *
- * Return 0 if ok, 1 if packet should be dropped.
- * This function should be passed the input vtr config for the interface.
- */
-always_inline u8
-l2_efp_filter_process (vlib_buffer_t * b0, vtr_config_t * in_config)
-{
- u8 *eth;
- u64 packet_tags;
- u64 tag_mask;
-
- eth = vlib_buffer_get_current (b0);
-
- /*
- * If there are 2 tags pushed, they must match config->tags[0] and
- * config->tags[1].
- * If there is one tag pushed, it must match config->tag[1].
- * If there are 0 tags pushed, the check passes.
- */
-
- /* mask for two vlan id and ethertypes, no cos bits */
- tag_mask = clib_net_to_host_u64 (0xFFFF0FFFFFFF0FFF);
- /* mask for one vlan id and ethertype, no cos bits */
- tag_mask =
- (in_config->push_bytes ==
- 4) ? clib_net_to_host_u64 (0xFFFF0FFF) : tag_mask;
- /* mask for always match */
- tag_mask = (in_config->push_bytes == 0) ? 0 : tag_mask;
-
- /*
- * Read 8B from the packet, getting the proper set of vlan tags
- * For 0 push bytes, the address doesn't matter since the mask
- * clears the data to 0.
- */
- packet_tags = *((u64 *) (eth + 4 + in_config->push_bytes));
-
- /* Check if the packet tags match the configured tags */
- return (packet_tags & tag_mask) != in_config->raw_tags;
-}
-
-typedef struct
-{
- union
- {
- ethernet_pbb_header_t macs_tags;
- struct
- {
- u64 data1;
- u64 data2;
- u16 data3;
- u32 data4;
- } raw_data;
- };
- union
- {
- struct
- {
- u8 push_bytes; /* number of bytes to push pbb tags */
- u8 pop_bytes; /* number of bytes to pop pbb tags */
- };
- u16 push_and_pop_bytes; /* if 0 then the feature is disabled */
- };
-} ptr_config_t;
-
-always_inline u32
-l2_pbb_process (vlib_buffer_t * b0, ptr_config_t * config)
-{
- u8 *eth = vlib_buffer_get_current (b0);
-
- if (config->pop_bytes > 0)
- {
- ethernet_pbb_header_packed_t *ph = (ethernet_pbb_header_packed_t *) eth;
-
- // drop packet without PBB header or with wrong I-tag or B-tag
- if (clib_net_to_host_u16 (ph->priority_dei_id) !=
- clib_net_to_host_u16 (config->macs_tags.priority_dei_id)
- || clib_net_to_host_u32 (ph->priority_dei_uca_res_sid) !=
- clib_net_to_host_u32 (config->macs_tags.priority_dei_uca_res_sid))
- return 1;
-
- eth += config->pop_bytes;
- }
-
- if (config->push_bytes > 0)
- {
- eth -= config->push_bytes;
- // copy the B-DA (6B), B-SA (6B), B-TAG (4B), I-TAG (6B)
- *((u64 *) eth) = config->raw_data.data1;
- *((u64 *) (eth + 8)) = config->raw_data.data2;
- *((u16 *) (eth + 16)) = config->raw_data.data3;
- *((u32 *) (eth + 18)) = config->raw_data.data4;
- }
-
- /* Update l2_len */
- vnet_buffer (b0)->l2.l2_len +=
- (word) config->push_bytes - (word) config->pop_bytes;
- /* Update packet len */
- vlib_buffer_advance (b0,
- (word) config->pop_bytes - (word) config->push_bytes);
-
- return 0;
-}
-
-u32 l2pbb_configure (vlib_main_t * vlib_main,
- vnet_main_t * vnet_main, u32 sw_if_index, u32 vtr_op,
- u8 * b_dmac, u8 * b_smac,
- u16 b_vlanid, u32 i_sid, u16 vlan_outer_tag);
-
-/**
- * Configure vtag tag rewrite on the given interface.
- * Return 1 if there is an error, 0 if ok
- */
-u32 l2vtr_configure (vlib_main_t * vlib_main,
- vnet_main_t * vnet_main,
- u32 sw_if_index,
- u32 vtr_op, u32 push_dot1q, u32 vtr_tag1, u32 vtr_tag2);
-
-/**
- * Get vtag tag rewrite on the given interface.
- * Return 1 if there is an error, 0 if ok
- */
-u32 l2vtr_get (vlib_main_t * vlib_main,
- vnet_main_t * vnet_main,
- u32 sw_if_index,
- u32 * vtr_op,
- u32 * push_dot1q, u32 * vtr_tag1, u32 * vtr_tag2);
-
-#endif /* included_vnet_l2_vtr_h */
-
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff