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Diffstat (limited to 'vnet/vnet/mpls/mpls.h')
| -rw-r--r-- | vnet/vnet/mpls/mpls.h | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/vnet/vnet/mpls/mpls.h b/vnet/vnet/mpls/mpls.h new file mode 100644 index 00000000..2aeae49d --- /dev/null +++ b/vnet/vnet/mpls/mpls.h @@ -0,0 +1,362 @@ +/* + * 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. + */ +#ifndef included_vnet_mpls_gre_h +#define included_vnet_mpls_gre_h + +#include <vnet/vnet.h> +#include <vnet/gre/gre.h> +#include <vnet/mpls/packet.h> +#include <vnet/mpls/mpls_types.h> +#include <vnet/ip/ip4_packet.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/fib/fib_node.h> +#include <vnet/adj/adj.h> + +typedef CLIB_PACKED (struct { + ip4_header_t ip4; /* 20 bytes */ + gre_header_t gre; /* 4 bytes */ + mpls_unicast_header_t labels[0]; /* 4 bytes each */ +}) ip4_gre_and_mpls_header_t; + +extern vnet_hw_interface_class_t mpls_gre_hw_interface_class; + +typedef enum { +#define mpls_error(n,s) MPLS_ERROR_##n, +#include <vnet/mpls/error.def> +#undef mpls_error + MPLS_N_ERROR, +} mpls_gre_error_t; + +/* + * No protocol info, MPLS labels don't have a next-header field + * presumably the label field tells all... + */ + +typedef struct { + fib_node_t mgt_node; + ip4_address_t tunnel_src; + ip4_address_t tunnel_dst; + ip4_address_t intfc_address; + u32 mask_width; + u32 inner_fib_index; + u32 outer_fib_index; + u32 encap_index; + u32 hw_if_index; /* L2 x-connect capable tunnel intfc */ + u8 * rewrite_data; + u8 l2_only; + fib_node_index_t fei; /* FIB Entry index for the tunnel's destination */ + adj_index_t adj_index; /* The midchain adj this tunnel creates */ + u32 sibling_index; +} mpls_gre_tunnel_t; + +typedef struct { + u8 tunnel_dst[6]; + ip4_address_t intfc_address; + u32 tx_sw_if_index; + u32 inner_fib_index; + u32 mask_width; + u32 encap_index; + u32 hw_if_index; + u8 * rewrite_data; + u8 l2_only; + fib_node_index_t fei; +} mpls_eth_tunnel_t; + +typedef struct { + mpls_unicast_header_t *labels; + /* only for policy tunnels */ + u8 * rewrite; + u32 output_next_index; +} mpls_encap_t; + +typedef struct { + u32 tx_fib_index; + u32 next_index; /* e.g. ip4/6-input, l2-input */ +} mpls_decap_t; + +#define MPLS_FIB_DEFAULT_TABLE_ID 0 + +/** + * Type exposure is to allow the DP fast/inlined access + */ +#define MPLS_FIB_KEY_SIZE 21 +#define MPLS_FIB_DB_SIZE (1 << (MPLS_FIB_KEY_SIZE-1)) + +typedef struct mpls_fib_t_ +{ + /** + * A hash table of entries. 21 bit key + * Hash table for reduced memory footprint + */ + uword * mf_entries; + + /** + * The load-balance indeices keyed by 21 bit label+eos bit. + * A flat array for maximum lookup performace. + */ + index_t mf_lbs[MPLS_FIB_DB_SIZE]; +} mpls_fib_t; + +/** + * @brief Definition of a callback for receiving MPLS interface state change + * notifications + */ +typedef void (*mpls_interface_state_change_callback_t)(u32 sw_if_index, + u32 is_enable); + +typedef struct { + /* MPLS FIB index for each software interface */ + u32 *fib_index_by_sw_if_index; + + /** A pool of all the MPLS FIBs */ + struct fib_table_t_ *fibs; + + /** A hash table to lookup the mpls_fib by table ID */ + uword *fib_index_by_table_id; + + /* rx/tx interface/feature configuration. */ + ip_config_main_t rx_config_mains, tx_config_main; + + /* Built-in unicast feature path indices, see ip_feature_init_cast(...) */ + u32 mpls_rx_feature_lookup; + u32 mpls_rx_feature_not_enabled; + + /* pool of gre tunnel instances */ + mpls_gre_tunnel_t *gre_tunnels; + u32 * free_gre_sw_if_indices; + + /* pool of ethernet tunnel instances */ + mpls_eth_tunnel_t *eth_tunnels; + u32 * free_eth_sw_if_indices; + + /* Encap side: map (fib, dst_address) to mpls label stack */ + mpls_encap_t * encaps; + uword * mpls_encap_by_fib_and_dest; + + /* Decap side: map rx label to FIB */ + mpls_decap_t * decaps; + uword * mpls_decap_by_rx_fib_and_label; + + /* mpls-o-e policy tunnel next index for ip4/ip6-classify */ + u32 ip4_classify_mpls_policy_encap_next_index; + u32 ip6_classify_mpls_policy_encap_next_index; + + /* feature path configuration lists */ + vnet_ip_feature_registration_t * next_feature; + + /* Save feature results for show command */ + char **feature_nodes; + + /* IP4 enabled count by software interface */ + u8 * mpls_enabled_by_sw_if_index; + + /* Functions to call when MPLS state on an interface changes. */ + mpls_interface_state_change_callback_t * mpls_interface_state_change_callbacks; + + /* convenience */ + vlib_main_t * vlib_main; + vnet_main_t * vnet_main; +} mpls_main_t; + +extern mpls_main_t mpls_main; + +#define VNET_MPLS_FEATURE_INIT(x,...) \ + __VA_ARGS__ vnet_ip_feature_registration_t uc_##x; \ +static void __vnet_add_feature_registration_uc_##x (void) \ + __attribute__((__constructor__)) ; \ +static void __vnet_add_feature_registration_uc_##x (void) \ +{ \ + mpls_main_t * mm = &mpls_main; \ + uc_##x.next = mm->next_feature; \ + mm->next_feature = &uc_##x; \ +} \ +__VA_ARGS__ vnet_ip_feature_registration_t uc_##x + +extern clib_error_t * mpls_feature_init(vlib_main_t * vm); + +format_function_t format_mpls_protocol; +format_function_t format_mpls_gre_header_with_length; +format_function_t format_mpls_eth_header_with_length; +format_function_t format_mpls_encap_index; + +format_function_t format_mpls_eos_bit; +format_function_t format_mpls_unicast_header_net_byte_order; +format_function_t format_mpls_unicast_label; +format_function_t format_mpls_header; + +extern vlib_node_registration_t mpls_input_node; +extern vlib_node_registration_t mpls_policy_encap_node; +extern vlib_node_registration_t mpls_output_node; +extern vlib_node_registration_t mpls_midchain_node; + +extern vnet_device_class_t mpls_gre_device_class; + +/* Parse mpls protocol as 0xXXXX or protocol name. + In either host or network byte order. */ +unformat_function_t unformat_mpls_protocol_host_byte_order; +unformat_function_t unformat_mpls_protocol_net_byte_order; +unformat_function_t unformat_mpls_label_net_byte_order; +unformat_function_t unformat_mpls_gre_header; +unformat_function_t unformat_pg_mpls_gre_header; +unformat_function_t unformat_mpls_unicast_label; + +/* Parse mpls header. */ +unformat_function_t unformat_mpls_header; +unformat_function_t unformat_pg_mpls_header; + +/* manually added to the interface output node in mpls.c */ +#define MPLS_GRE_OUTPUT_NEXT_LOOKUP 1 +#define MPLS_GRE_OUTPUT_NEXT_DROP VNET_INTERFACE_TX_NEXT_DROP + +void mpls_sw_interface_enable_disable (mpls_main_t * mm, + u32 sw_if_index, + u8 is_enable); + +u8 mpls_sw_interface_is_enabled (u32 sw_if_index); + +mpls_encap_t * +mpls_encap_by_fib_and_dest (mpls_main_t * mm, u32 rx_fib, u32 dst_address); + +int mpls_label_from_fib_id_and_dest (mpls_main_t *gm, u32 fib_id, + u32 dst_address, u32 *labelp); + +int vnet_mpls_gre_add_del_tunnel (ip4_address_t *src, + ip4_address_t *dst, + ip4_address_t *intfc, + u32 mask_width, + u32 inner_fib_id, u32 outer_fib_id, + u32 * tunnel_intfc_sw_if_index, + u8 l2_only, + u8 is_add); + +int vnet_mpls_ethernet_add_del_tunnel (u8 *dst, + ip4_address_t *intfc, + u32 mask_width, + u32 inner_fib_id, + u32 tx_sw_if_index, + u32 * tunnel_sw_if_index, + u8 l2_only, + u8 is_add); + +int vnet_mpls_gre_delete_fib_tunnels (u32 fib_id); + +int mpls_fib_reset_labels (u32 fib_id); + +int vnet_mpls_add_del_decap (u32 rx_fib_id, + u32 tx_fib_id, + u32 label_host_byte_order, + int s_bit, int next_index, int is_add); + +int vnet_mpls_add_del_encap (ip4_address_t *dest, u32 fib_id, + u32 *labels_host_byte_order, + u32 policy_tunnel_index, + int no_dst_hash, u32 * indexp, int is_add); + +int vnet_mpls_policy_tunnel_add_rewrite (mpls_main_t * mm, + mpls_encap_t * e, + u32 policy_tunnel_index); + +typedef struct { + u32 lookup_miss; + + /* Tunnel-id / index in tunnel vector */ + u32 tunnel_id; + + /* mpls encap index */ + u32 mpls_encap_index; + + /* pkt length */ + u32 length; + + /* tunnel ip4 addresses */ + ip4_address_t src; + ip4_address_t dst; +} mpls_gre_tx_trace_t; + +u8 * format_mpls_gre_tx_trace (u8 * s, va_list * args); +u8 * format_mpls_gre_header (u8 * s, va_list * args); + +#define foreach_mpls_input_next \ +_(DROP, "error-drop") \ +_(LOOKUP, "mpls-lookup") + +typedef enum { +#define _(s,n) MPLS_INPUT_NEXT_##s, + foreach_mpls_input_next +#undef _ + MPLS_INPUT_N_NEXT, +} mpls_input_next_t; + +#define foreach_mpls_lookup_next \ +_(DROP, "error-drop") \ +_(IP4_INPUT, "ip4-input") \ +_(L2_OUTPUT, "l2-output") + +// FIXME remove. +typedef enum { +#define _(s,n) MPLS_LOOKUP_NEXT_##s, + foreach_mpls_lookup_next +#undef _ + MPLS_LOOKUP_N_NEXT, +} mpls_lookup_next_t; + +#define foreach_mpls_output_next \ +_(DROP, "error-drop") + +typedef enum { +#define _(s,n) MPLS_OUTPUT_NEXT_##s, + foreach_mpls_output_next +#undef _ + MPLS_OUTPUT_N_NEXT, +} mpls_output_next_t; + +typedef struct { + u32 lookup_miss; + + /* Tunnel-id / index in tunnel vector */ + u32 tunnel_id; + + /* output interface */ + u32 tx_sw_if_index; + + /* mpls encap index */ + u32 mpls_encap_index; + + /* pkt length */ + u32 length; + + u8 dst[6]; +} mpls_eth_tx_trace_t; + +u8 * format_mpls_eth_tx_trace (u8 * s, va_list * args); + +typedef struct { + u32 fib_index; + u32 entry_index; + u32 dest; + u32 s_bit; + u32 label; +} show_mpls_fib_t; + +int +mpls_dest_cmp(void * a1, void * a2); + +int +mpls_fib_index_cmp(void * a1, void * a2); + +int +mpls_label_cmp(void * a1, void * a2); + +#endif /* included_vnet_mpls_gre_h */ |