| /* |
| * 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. |
| */ |
| /* |
| * ethernet.h: types/functions for ethernet. |
| * |
| * 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_ethernet_h |
| #define included_ethernet_h |
| |
| #include <vnet/vnet.h> |
| #include <vnet/ethernet/packet.h> |
| #include <vnet/pg/pg.h> |
| #include <vnet/feature/feature.h> |
| |
| always_inline u64 |
| ethernet_mac_address_u64 (u8 * a) |
| { |
| return (((u64) a[0] << (u64) (5 * 8)) |
| | ((u64) a[1] << (u64) (4 * 8)) |
| | ((u64) a[2] << (u64) (3 * 8)) |
| | ((u64) a[3] << (u64) (2 * 8)) |
| | ((u64) a[4] << (u64) (1 * 8)) | ((u64) a[5] << (u64) (0 * 8))); |
| } |
| |
| static inline int |
| ethernet_mac_address_is_multicast_u64 (u64 a) |
| { |
| return (a & (1ULL << (5 * 8))) != 0; |
| } |
| |
| static inline int |
| ethernet_mac_address_is_zero (u8 * mac) |
| { |
| return ((*((u32 *) mac) == 0) && (*((u16 *) (mac + 4)) == 0)); |
| } |
| |
| static_always_inline int |
| ethernet_frame_is_tagged (u16 type) |
| { |
| #if __SSE4_2__ |
| const __m128i ethertype_mask = _mm_set_epi16 ((u16) ETHERNET_TYPE_VLAN, |
| (u16) ETHERNET_TYPE_DOT1AD, |
| (u16) ETHERNET_TYPE_VLAN_9100, |
| (u16) ETHERNET_TYPE_VLAN_9200, |
| /* duplicate last one to |
| fill register */ |
| (u16) ETHERNET_TYPE_VLAN_9200, |
| (u16) ETHERNET_TYPE_VLAN_9200, |
| (u16) ETHERNET_TYPE_VLAN_9200, |
| (u16) |
| ETHERNET_TYPE_VLAN_9200); |
| |
| __m128i r = _mm_set1_epi16 (type); |
| r = _mm_cmpeq_epi16 (ethertype_mask, r); |
| return !_mm_test_all_zeros (r, r); |
| #else |
| if ((type == ETHERNET_TYPE_VLAN) || |
| (type == ETHERNET_TYPE_DOT1AD) || |
| (type == ETHERNET_TYPE_VLAN_9100) || (type == ETHERNET_TYPE_VLAN_9200)) |
| return 1; |
| #endif |
| return 0; |
| } |
| |
| /* Max. sized ethernet/vlan header for parsing. */ |
| typedef struct |
| { |
| ethernet_header_t ethernet; |
| |
| /* Allow up to 2 stacked vlan headers. */ |
| ethernet_vlan_header_t vlan[2]; |
| } ethernet_max_header_t; |
| |
| struct vnet_hw_interface_t; |
| /* Ethernet flag change callback. */ |
| typedef u32 (ethernet_flag_change_function_t) |
| (vnet_main_t * vnm, struct vnet_hw_interface_t * hi, u32 flags); |
| |
| #define ETHERNET_MIN_PACKET_BYTES 64 |
| #define ETHERNET_MAX_PACKET_BYTES 9216 |
| |
| /* Ethernet interface instance. */ |
| typedef struct ethernet_interface |
| { |
| |
| /* Accept all packets (promiscuous mode). */ |
| #define ETHERNET_INTERFACE_FLAG_ACCEPT_ALL (1 << 0) |
| #define ETHERNET_INTERFACE_FLAG_CONFIG_PROMISC(flags) \ |
| (((flags) & ~ETHERNET_INTERFACE_FLAG_ACCEPT_ALL) == 0) |
| |
| /* Change MTU on interface from hw interface structure */ |
| #define ETHERNET_INTERFACE_FLAG_MTU (1 << 1) |
| #define ETHERNET_INTERFACE_FLAG_CONFIG_MTU(flags) \ |
| ((flags) & ETHERNET_INTERFACE_FLAG_MTU) |
| |
| /* Callback, e.g. to turn on/off promiscuous mode */ |
| ethernet_flag_change_function_t *flag_change; |
| |
| u32 driver_instance; |
| |
| /* Ethernet (MAC) address for this interface. */ |
| u8 address[6]; |
| } ethernet_interface_t; |
| |
| extern vnet_hw_interface_class_t ethernet_hw_interface_class; |
| |
| typedef struct |
| { |
| /* Name (a c string). */ |
| char *name; |
| |
| /* Ethernet type in host byte order. */ |
| ethernet_type_t type; |
| |
| /* Node which handles this type. */ |
| u32 node_index; |
| |
| /* Next index for this type. */ |
| u32 next_index; |
| } ethernet_type_info_t; |
| |
| typedef enum |
| { |
| #define ethernet_error(n,c,s) ETHERNET_ERROR_##n, |
| #include <vnet/ethernet/error.def> |
| #undef ethernet_error |
| ETHERNET_N_ERROR, |
| } ethernet_error_t; |
| |
| |
| // Structs used when parsing packet to find sw_if_index |
| |
| typedef struct |
| { |
| u32 sw_if_index; |
| u32 flags; |
| // config entry is-valid flag |
| // exact match flags (valid if packet has 0/1/2/3 tags) |
| // L2 vs L3 forwarding mode |
| #define SUBINT_CONFIG_MATCH_0_TAG (1<<0) |
| #define SUBINT_CONFIG_MATCH_1_TAG (1<<1) |
| #define SUBINT_CONFIG_MATCH_2_TAG (1<<2) |
| #define SUBINT_CONFIG_MATCH_3_TAG (1<<3) |
| #define SUBINT_CONFIG_VALID (1<<4) |
| #define SUBINT_CONFIG_L2 (1<<5) |
| #define SUBINT_CONFIG_P2P (1<<6) |
| |
| } subint_config_t; |
| |
| always_inline u32 |
| eth_create_valid_subint_match_flags (u32 num_tags) |
| { |
| return SUBINT_CONFIG_VALID | (1 << num_tags); |
| } |
| |
| |
| typedef struct |
| { |
| subint_config_t untagged_subint; |
| subint_config_t default_subint; |
| u16 dot1q_vlans; // pool id for vlan table |
| u16 dot1ad_vlans; // pool id for vlan table |
| } main_intf_t; |
| |
| typedef struct |
| { |
| subint_config_t single_tag_subint; |
| subint_config_t inner_any_subint; |
| u32 qinqs; // pool id for qinq table |
| } vlan_intf_t; |
| |
| typedef struct |
| { |
| vlan_intf_t vlans[ETHERNET_N_VLAN]; |
| } vlan_table_t; |
| |
| typedef struct |
| { |
| subint_config_t subint; |
| } qinq_intf_t; |
| |
| typedef struct |
| { |
| qinq_intf_t vlans[ETHERNET_N_VLAN]; |
| } qinq_table_t; |
| |
| // Structure mapping to a next index based on ethertype. |
| // Common ethertypes are stored explicitly, others are |
| // stored in a sparse table. |
| typedef struct |
| { |
| /* Sparse vector mapping ethernet type in network byte order |
| to next index. */ |
| u16 *input_next_by_type; |
| u32 *sparse_index_by_input_next_index; |
| |
| /* cached next indexes for common ethertypes */ |
| u32 input_next_ip4; |
| u32 input_next_ip6; |
| u32 input_next_mpls; |
| } next_by_ethertype_t; |
| |
| typedef struct |
| { |
| vlib_main_t *vlib_main; |
| |
| /* next node index for the L3 input node of each ethertype */ |
| next_by_ethertype_t l3_next; |
| |
| /* next node index for L2 interfaces */ |
| u32 l2_next; |
| |
| /* flag and next node index for L3 redirect */ |
| u32 redirect_l3; |
| u32 redirect_l3_next; |
| |
| /* Pool of ethernet interface instances. */ |
| ethernet_interface_t *interfaces; |
| |
| ethernet_type_info_t *type_infos; |
| |
| /* Hash tables mapping name/type to type info index. */ |
| uword *type_info_by_name, *type_info_by_type; |
| |
| // The root of the vlan parsing tables. A vector with one element |
| // for each main interface, indexed by hw_if_index. |
| main_intf_t *main_intfs; |
| |
| // Pool of vlan tables |
| vlan_table_t *vlan_pool; |
| |
| // Pool of qinq tables; |
| qinq_table_t *qinq_pool; |
| |
| /* Set to one to use AB.CD.EF instead of A:B:C:D:E:F as ethernet format. */ |
| int format_ethernet_address_16bit; |
| |
| /* debug: make sure we don't wipe out an ethernet registration by mistake */ |
| u8 next_by_ethertype_register_called; |
| |
| /* Feature arc index */ |
| u8 output_feature_arc_index; |
| |
| /* Allocated loopback instances */ |
| uword *bm_loopback_instances; |
| } ethernet_main_t; |
| |
| extern ethernet_main_t ethernet_main; |
| |
| always_inline ethernet_type_info_t * |
| ethernet_get_type_info (ethernet_main_t * em, ethernet_type_t type) |
| { |
| uword *p = hash_get (em->type_info_by_type, type); |
| return p ? vec_elt_at_index (em->type_infos, p[0]) : 0; |
| } |
| |
| ethernet_interface_t *ethernet_get_interface (ethernet_main_t * em, |
| u32 hw_if_index); |
| |
| clib_error_t *ethernet_register_interface (vnet_main_t * vnm, |
| u32 dev_class_index, |
| u32 dev_instance, |
| u8 * address, |
| u32 * hw_if_index_return, |
| ethernet_flag_change_function_t |
| flag_change); |
| |
| void ethernet_delete_interface (vnet_main_t * vnm, u32 hw_if_index); |
| |
| /* Register given node index to take input for given ethernet type. */ |
| void |
| ethernet_register_input_type (vlib_main_t * vm, |
| ethernet_type_t type, u32 node_index); |
| |
| /* Register given node index to take input for packet from L2 interfaces. */ |
| void ethernet_register_l2_input (vlib_main_t * vm, u32 node_index); |
| |
| /* Register given node index to take redirected L3 traffic, and enable L3 redirect */ |
| void ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index); |
| |
| /* Formats ethernet address X:X:X:X:X:X */ |
| u8 *format_ethernet_address (u8 * s, va_list * args); |
| u8 *format_ethernet_type (u8 * s, va_list * args); |
| u8 *format_ethernet_vlan_tci (u8 * s, va_list * va); |
| u8 *format_ethernet_header (u8 * s, va_list * args); |
| u8 *format_ethernet_header_with_length (u8 * s, va_list * args); |
| |
| /* Parse ethernet address in either X:X:X:X:X:X unix or X.X.X cisco format. */ |
| uword unformat_ethernet_address (unformat_input_t * input, va_list * args); |
| |
| /* Parse ethernet type as 0xXXXX or type name from ethernet/types.def. |
| In either host or network byte order. */ |
| uword |
| unformat_ethernet_type_host_byte_order (unformat_input_t * input, |
| va_list * args); |
| uword |
| unformat_ethernet_type_net_byte_order (unformat_input_t * input, |
| va_list * args); |
| |
| /* Parse ethernet header. */ |
| uword unformat_ethernet_header (unformat_input_t * input, va_list * args); |
| |
| /* Parse ethernet interface name; return hw_if_index. */ |
| uword unformat_ethernet_interface (unformat_input_t * input, va_list * args); |
| |
| uword unformat_pg_ethernet_header (unformat_input_t * input, va_list * args); |
| |
| always_inline void |
| ethernet_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_ethernet_header_with_length; |
| n->unformat_buffer = unformat_ethernet_header; |
| pn->unformat_edit = unformat_pg_ethernet_header; |
| } |
| |
| always_inline ethernet_header_t * |
| ethernet_buffer_get_header (vlib_buffer_t * b) |
| { |
| return (void *) (b->data + vnet_buffer (b)->l2_hdr_offset); |
| } |
| |
| /** Returns the number of VLAN headers in the current Ethernet frame in the |
| * buffer. Returns 0, 1, 2 for the known header count. The value 3 indicates |
| * the number of headers is not known. |
| */ |
| #define ethernet_buffer_get_vlan_count(b) ( \ |
| ((b)->flags & VNET_BUFFER_FLAGS_VLAN_BITS) >> VNET_BUFFER_F_LOG2_VLAN_1_DEEP \ |
| ) |
| |
| /** Sets the number of VLAN headers in the current Ethernet frame in the |
| * buffer. Values 0, 1, 2 indicate the header count. The value 3 indicates |
| * the number of headers is not known. |
| */ |
| #define ethernet_buffer_set_vlan_count(b, v) ( \ |
| (b)->flags = ((b)->flags & ~VNET_BUFFER_FLAGS_VLAN_BITS) | \ |
| (((v) << VNET_BUFFER_F_LOG2_VLAN_1_DEEP) & VNET_BUFFER_FLAGS_VLAN_BITS) \ |
| ) |
| |
| /** Adjusts the vlan count by the delta in 'v' */ |
| #define ethernet_buffer_adjust_vlan_count(b, v) ( \ |
| ethernet_buffer_set_vlan_count(b, \ |
| (word)ethernet_buffer_get_vlan_count(b) + (word)(v)) \ |
| ) |
| |
| /** Adjusts the vlan count by the header size byte delta in 'v' */ |
| #define ethernet_buffer_adjust_vlan_count_by_bytes(b, v) ( \ |
| (b)->flags = ((b)->flags & ~VNET_BUFFER_FLAGS_VLAN_BITS) | (( \ |
| ((b)->flags & VNET_BUFFER_FLAGS_VLAN_BITS) + \ |
| ((v) << (VNET_BUFFER_F_LOG2_VLAN_1_DEEP - 2)) \ |
| ) & VNET_BUFFER_FLAGS_VLAN_BITS) \ |
| ) |
| |
| /** |
| * Determine the size of the Ethernet headers of the current frame in |
| * the buffer. This uses the VLAN depth flags that are set by |
| * ethernet-input. Because these flags are stored in the vlib_buffer_t |
| * "flags" field this count is valid regardless of the node so long as it's |
| * checked downstream of ethernet-input; That is, the value is not stored in |
| * the opaque space. |
| */ |
| #define ethernet_buffer_header_size(b) ( \ |
| ethernet_buffer_get_vlan_count((b)) * sizeof(ethernet_vlan_header_t) + \ |
| sizeof(ethernet_header_t) \ |
| ) |
| |
| ethernet_main_t *ethernet_get_main (vlib_main_t * vm); |
| u32 ethernet_set_flags (vnet_main_t * vnm, u32 hw_if_index, u32 flags); |
| void ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, |
| u32 l2); |
| void ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm, |
| u32 sw_if_index, u32 l2); |
| void ethernet_set_rx_redirect (vnet_main_t * vnm, vnet_hw_interface_t * hi, |
| u32 enable); |
| |
| int |
| vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm, |
| u32 sw_if_index, void *a_arg, |
| int is_static, int is_no_fib_entry); |
| |
| int |
| vnet_arp_unset_ip4_over_ethernet (vnet_main_t * vnm, |
| u32 sw_if_index, void *a_arg); |
| |
| int vnet_proxy_arp_fib_reset (u32 fib_id); |
| |
| clib_error_t *next_by_ethertype_init (next_by_ethertype_t * l3_next); |
| clib_error_t *next_by_ethertype_register (next_by_ethertype_t * l3_next, |
| u32 ethertype, u32 next_index); |
| |
| int vnet_create_loopback_interface (u32 * sw_if_indexp, u8 * mac_address, |
| u8 is_specified, u32 user_instance); |
| int vnet_delete_loopback_interface (u32 sw_if_index); |
| int vnet_delete_sub_interface (u32 sw_if_index); |
| |
| // Perform ethernet subinterface classification table lookups given |
| // the ports's sw_if_index and fields extracted from the ethernet header. |
| // The resulting tables are used by identify_subint(). |
| always_inline void |
| eth_vlan_table_lookups (ethernet_main_t * em, |
| vnet_main_t * vnm, |
| u32 port_sw_if_index0, |
| u16 first_ethertype, |
| u16 outer_id, |
| u16 inner_id, |
| vnet_hw_interface_t ** hi, |
| main_intf_t ** main_intf, |
| vlan_intf_t ** vlan_intf, qinq_intf_t ** qinq_intf) |
| { |
| vlan_table_t *vlan_table; |
| qinq_table_t *qinq_table; |
| u32 vlan_table_id; |
| |
| // Read the main, vlan, and qinq interface table entries |
| // TODO: Consider if/how to prefetch tables. Also consider |
| // single-entry cache to skip table lookups and identify_subint() |
| // processing. |
| *hi = vnet_get_sup_hw_interface (vnm, port_sw_if_index0); |
| *main_intf = vec_elt_at_index (em->main_intfs, (*hi)->hw_if_index); |
| |
| // Always read the vlan and qinq tables, even if there are not that |
| // many tags on the packet. This makes the lookups and comparisons |
| // easier (and less branchy). |
| vlan_table_id = (first_ethertype == ETHERNET_TYPE_DOT1AD) ? |
| (*main_intf)->dot1ad_vlans : (*main_intf)->dot1q_vlans; |
| vlan_table = vec_elt_at_index (em->vlan_pool, vlan_table_id); |
| *vlan_intf = &vlan_table->vlans[outer_id]; |
| |
| qinq_table = vec_elt_at_index (em->qinq_pool, (*vlan_intf)->qinqs); |
| *qinq_intf = &qinq_table->vlans[inner_id]; |
| } |
| |
| |
| // Determine the subinterface for this packet, given the result of the |
| // vlan table lookups and vlan header parsing. Check the most specific |
| // matches first. |
| // Returns 1 if a matching subinterface was found, otherwise returns 0. |
| always_inline u32 |
| eth_identify_subint (vnet_hw_interface_t * hi, |
| vlib_buffer_t * b0, |
| u32 match_flags, |
| main_intf_t * main_intf, |
| vlan_intf_t * vlan_intf, |
| qinq_intf_t * qinq_intf, |
| u32 * new_sw_if_index, u8 * error0, u32 * is_l2) |
| { |
| subint_config_t *subint; |
| |
| // Each comparison is checking both the valid flag and the number of tags |
| // (incorporating exact-match/non-exact-match). |
| |
| // check for specific double tag |
| subint = &qinq_intf->subint; |
| if ((subint->flags & match_flags) == match_flags) |
| goto matched; |
| |
| // check for specific outer and 'any' inner |
| subint = &vlan_intf->inner_any_subint; |
| if ((subint->flags & match_flags) == match_flags) |
| goto matched; |
| |
| // check for specific single tag |
| subint = &vlan_intf->single_tag_subint; |
| if ((subint->flags & match_flags) == match_flags) |
| goto matched; |
| |
| // check for untagged interface |
| subint = &main_intf->untagged_subint; |
| if ((subint->flags & match_flags) == match_flags) |
| goto matched; |
| |
| // check for default interface |
| subint = &main_intf->default_subint; |
| if ((subint->flags & match_flags) == match_flags) |
| goto matched; |
| |
| // No matching subinterface |
| *new_sw_if_index = ~0; |
| *error0 = ETHERNET_ERROR_UNKNOWN_VLAN; |
| *is_l2 = 0; |
| return 0; |
| |
| matched: |
| *new_sw_if_index = subint->sw_if_index; |
| *is_l2 = subint->flags & SUBINT_CONFIG_L2; |
| return 1; |
| } |
| |
| // Compare two ethernet macs. Return 1 if they are the same, 0 if different |
| always_inline u32 |
| eth_mac_equal (u8 * mac1, u8 * mac2) |
| { |
| return (*((u32 *) (mac1 + 0)) == *((u32 *) (mac2 + 0)) && |
| *((u32 *) (mac1 + 2)) == *((u32 *) (mac2 + 2))); |
| } |
| |
| |
| always_inline ethernet_main_t * |
| vnet_get_ethernet_main (void) |
| { |
| return ðernet_main; |
| } |
| |
| void vnet_register_ip4_arp_resolution_event (vnet_main_t * vnm, |
| void *address_arg, |
| uword node_index, |
| uword type_opaque, uword data); |
| |
| |
| int vnet_add_del_ip4_arp_change_event (vnet_main_t * vnm, |
| void *data_callback, |
| u32 pid, |
| void *address_arg, |
| uword node_index, |
| uword type_opaque, |
| uword data, int is_add); |
| |
| void wc_arp_set_publisher_node (uword inode_index, uword event_type); |
| |
| void ethernet_arp_change_mac (u32 sw_if_index); |
| void ethernet_ndp_change_mac (u32 sw_if_index); |
| |
| void arp_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai); |
| |
| void ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai); |
| u8 *ethernet_build_rewrite (vnet_main_t * vnm, |
| u32 sw_if_index, |
| vnet_link_t link_type, const void *dst_address); |
| const u8 *ethernet_ip4_mcast_dst_addr (void); |
| const u8 *ethernet_ip6_mcast_dst_addr (void); |
| |
| extern vlib_node_registration_t ethernet_input_node; |
| |
| typedef struct |
| { |
| u32 sw_if_index; |
| u32 ip4; |
| u8 mac[6]; |
| } wc_arp_report_t; |
| |
| #endif /* included_ethernet_h */ |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |