/* * node.c * * 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. */ #include #include #include #include /******************************* Packet tracing *******************************/ typedef struct { u32 localsid_index; } srv6_ad_localsid_trace_t; typedef struct { u8 error; ip6_address_t src, dst; } srv6_ad_rewrite_trace_t; static u8 * format_srv6_ad_localsid_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); srv6_ad_localsid_trace_t *t = va_arg (*args, srv6_ad_localsid_trace_t *); return format (s, "SRv6-AD-localsid: localsid_index %d", t->localsid_index); } static u8 * format_srv6_ad_rewrite_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); srv6_ad_rewrite_trace_t *t = va_arg (*args, srv6_ad_rewrite_trace_t *); if (PREDICT_FALSE (t->error != 0)) { return format (s, "SRv6-AD-rewrite: cache is empty"); } return format (s, "SRv6-AD-rewrite: src %U dst %U", format_ip6_address, &t->src, format_ip6_address, &t->dst); } /***************************** Nodes registration *****************************/ vlib_node_registration_t srv6_ad4_rewrite_node; vlib_node_registration_t srv6_ad6_rewrite_node; /****************************** Packet counters *******************************/ #define foreach_srv6_ad_rewrite_counter \ _(PROCESSED, "srv6-ad rewritten packets") \ _(NO_RW, "(Error) No header for rewriting.") typedef enum { #define _(sym,str) SRV6_AD_REWRITE_COUNTER_##sym, foreach_srv6_ad_rewrite_counter #undef _ SRV6_AD_REWRITE_N_COUNTERS, } srv6_ad_rewrite_counters; static char *srv6_ad_rewrite_counter_strings[] = { #define _(sym,string) string, foreach_srv6_ad_rewrite_counter #undef _ }; /********************************* Next nodes *********************************/ typedef enum { SRV6_AD_LOCALSID_NEXT_ERROR, SRV6_AD_LOCALSID_NEXT_REWRITE4, SRV6_AD_LOCALSID_NEXT_REWRITE6, SRV6_AD_LOCALSID_NEXT_INTERFACE, SRV6_AD_LOCALSID_N_NEXT, } srv6_ad_localsid_next_t; typedef enum { SRV6_AD_REWRITE_NEXT_ERROR, SRV6_AD_REWRITE_NEXT_LOOKUP, SRV6_AD_REWRITE_N_NEXT, } srv6_ad_rewrite_next_t; /******************************* Local SID node *******************************/ /** * @brief Function doing SRH processing for AD behavior */ static_always_inline void end_ad_processing (vlib_buffer_t * b0, ip6_header_t * ip0, ip6_sr_header_t * sr0, ip6_sr_localsid_t * ls0, u32 * next0) { ip6_address_t *new_dst0; u16 total_size; ip6_ext_header_t *next_ext_header; u8 next_hdr; srv6_ad_localsid_t *ls0_mem; if (PREDICT_FALSE (ip0->protocol != IP_PROTOCOL_IPV6_ROUTE || sr0->type != ROUTING_HEADER_TYPE_SR)) { return; } if (PREDICT_FALSE (sr0->segments_left == 0)) { return; } /* Decrement Segments Left and update Destination Address */ sr0->segments_left -= 1; new_dst0 = (ip6_address_t *) (sr0->segments) + sr0->segments_left; ip0->dst_address.as_u64[0] = new_dst0->as_u64[0]; ip0->dst_address.as_u64[1] = new_dst0->as_u64[1]; /* Compute the total size of the IPv6 header and extensions */ total_size = sizeof (ip6_header_t); next_ext_header = (ip6_ext_header_t *) (ip0 + 1); next_hdr = ip0->protocol; while (ip6_ext_hdr (next_hdr)) { total_size += ip6_ext_header_len (next_ext_header); next_hdr = next_ext_header->next_hdr; next_ext_header = ip6_ext_next_header (next_ext_header); } /* Make sure next header is valid */ if (PREDICT_FALSE (next_hdr != IP_PROTOCOL_IPV6 && next_hdr != IP_PROTOCOL_IP_IN_IP && next_hdr != IP_PROTOCOL_IP6_ETHERNET)) { return; } /* Retrieve SID memory */ ls0_mem = ls0->plugin_mem; /* Cache IP header and extensions */ if (PREDICT_FALSE (total_size > ls0_mem->rw_len)) { vec_validate (ls0_mem->rewrite, total_size - 1); } clib_memcpy_fast (ls0_mem->rewrite, ip0, total_size); ls0_mem->rw_len = total_size; /* Remove IP header and extensions */ vlib_buffer_advance (b0, total_size); if (next_hdr == IP_PROTOCOL_IP6_ETHERNET) { /* Set output interface */ vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0_mem->sw_if_index_out; /* Set next node to interface-output */ *next0 = SRV6_AD_LOCALSID_NEXT_INTERFACE; } else { /* Set Xconnect adjacency to VNF */ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0_mem->nh_adj; /* Set next node to ip-rewrite */ *next0 = (next_hdr == IP_PROTOCOL_IPV6) ? SRV6_AD_LOCALSID_NEXT_REWRITE6 : SRV6_AD_LOCALSID_NEXT_REWRITE4; } } /** * @brief SRv6 AD Localsid graph node */ static uword srv6_ad_localsid_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { ip6_sr_main_t *sm = &sr_main; u32 n_left_from, next_index, *from, *to_next; u32 cnt_packets = 0; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); /* TODO: Dual/quad loop */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0; ip6_sr_header_t *sr0; ip6_sr_localsid_t *ls0; u32 next0 = SRV6_AD_LOCALSID_NEXT_ERROR; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); ip0 = vlib_buffer_get_current (b0); sr0 = (ip6_sr_header_t *) (ip0 + 1); /* Lookup the SR End behavior based on IP DA (adj) */ ls0 = pool_elt_at_index (sm->localsids, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); /* SRH processing */ end_ad_processing (b0, ip0, sr0, ls0, &next0); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { srv6_ad_localsid_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof *tr); tr->localsid_index = ls0 - sm->localsids; } /* This increments the SRv6 per LocalSID counters. */ vlib_increment_combined_counter (((next0 == SRV6_AD_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) : &(sm->sr_ls_valid_counters)), vm->thread_index, ls0 - sm->localsids, 1, vlib_buffer_length_in_chain (vm, b0)); vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); cnt_packets++; } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (srv6_ad_localsid_node) = { .function = srv6_ad_localsid_fn, .name = "srv6-ad-localsid", .vector_size = sizeof (u32), .format_trace = format_srv6_ad_localsid_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_next_nodes = SRV6_AD_LOCALSID_N_NEXT, .next_nodes = { [SRV6_AD_LOCALSID_NEXT_REWRITE4] = "ip4-rewrite", [SRV6_AD_LOCALSID_NEXT_REWRITE6] = "ip6-rewrite", [SRV6_AD_LOCALSID_NEXT_INTERFACE] = "interface-output", [SRV6_AD_LOCALSID_NEXT_ERROR] = "error-drop", }, }; /* *INDENT-ON* */ /******************************* Rewriting node *******************************/ /** * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation */ static uword srv6_ad2_rewrite_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { ip6_sr_main_t *srm = &sr_main; srv6_ad_main_t *sm = &srv6_ad_main; u32 n_left_from, next_index, *from, *to_next; u32 cnt_packets = 0; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); /* TODO: Dual/quad loop */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ethernet_header_t *en0; ip6_header_t *ip0 = 0; ip6_sr_localsid_t *ls0; srv6_ad_localsid_t *ls0_mem; u32 next0 = SRV6_AD_REWRITE_NEXT_LOOKUP; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); en0 = vlib_buffer_get_current (b0); ls0 = pool_elt_at_index (srm->localsids, sm->sw_iface_localsid2[vnet_buffer (b0)->sw_if_index [VLIB_RX]]); ls0_mem = ls0->plugin_mem; if (PREDICT_FALSE (ls0_mem == NULL || ls0_mem->rewrite == NULL)) { next0 = SRV6_AD_REWRITE_NEXT_ERROR; b0->error = node->errors[SRV6_AD_REWRITE_COUNTER_NO_RW]; } else { ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >= (ls0_mem->rw_len + b0->current_data)); clib_memcpy_fast (((u8 *) en0) - ls0_m
/*
 * Copyright (c) 2018 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.
 */

option version = "3.0.0";

import "vnet/interface_types.api";
import "vnet/ethernet/ethernet_types.api";
import "vlib/pci/pci_types.api";


/** \brief Initialize a new virtio pci interface with the given parameters
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param pci_addr - pci address
    @param use_random_mac - let the system generate a unique mac address
    @param mac_address - mac addr to assign to the interface if use_random not set
    @param gso_enabled - enable gso feature if available, 1 to enable
    @param checksum_offload_enabled - enable checksum feature if available, 1 to enable
    @param features - the virtio features which driver should negotiate with device
*/
define virtio_pci_create
{
  option deprecated;
  u32 client_index;
  u32 context;
  vl_api_pci_address_t pci_addr;
  bool use_random_mac;
  vl_api_mac_address_t mac_address;
  bool gso_enabled;
  bool checksum_offload_enabled;
  u64 features;
};

/** \brief Reply for virtio pci create reply
    @param context - returned sender context, to match reply w/ request
    @param retval - return code
    @param sw_if_index - software index allocated for the new virtio pci interface
*/
define virtio_pci_create_reply
{
  option deprecated;
  u32 context;
  i32 retval;
  vl_api_interface_index_t sw_if_index;
};

enum virtio_flags {
        VIRTIO_API_FLAG_GSO = 1, /* enable gso on the interface */
        VIRTIO_API_FLAG_CSUM_OFFLOAD = 2, /* enable checksum offload without gso on the interface */
        VIRTIO_API_FLAG_GRO_COALESCE = 4, /* enable packet coalescing on tx side, provided gso enabled */
        VIRTIO_API_FLAG_PACKED = 8, /* enable packed ring support, provided it is available from backend */
        VIRTIO_API_FLAG_IN_ORDER = 16, /* enable in order support, provided it is available from backend */
        VIRTIO_API_FLAG_BUFFERING = 32 [backwards_compatible], /* enable buffering to handle backend jitter/delays */
};

/** \brief Initialize a new virtio pci interface with the given parameters
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param pci_addr - pci address
    @param use_random_mac - let the system generate a unique mac address
    @param mac_address - mac addr to assign to the interface if use_random not set
    @param virtio_flags - feature flags to enable
    @param features - the virtio features which driver should negotiate with device
*/
define virtio_pci_create_v2
{
  u32 client_index;
  u32 context;
  vl_api_pci_address_t pci_addr;
  bool use_random_mac;
  vl_api_mac_address_t mac_address;
  vl_api_virtio_flags_t virtio_flags;
  u64 features;
};

/** \brief Reply for virtio pci create reply
    @param context - returned sender context, to match reply w/ request
    @param retval - return code
    @param sw_if_index - software index allocated for the new virtio pci interface
*/
define virtio_pci_create_v2_reply
{
  u32 context;
  i32 retval;
  vl_api_interface_index_t sw_if_index;
};

/** \brief Delete virtio pci interface
    @param client_index - opaque cookie to identify the sender
    @param context - sender context, to match reply w/ request
    @param sw_if_index - interface index of existing virtio pci interface
*/
autoreply define virtio_pci_delete
{
  u32 client_index;
  u32 context;
  vl_api_interface_index_t sw_if_index;
};

/** \brief Dump virtio pci interfaces request */
define sw_interface_virtio_pci_dump
{
  u32 client_index;
  u32 context;
};

/** \brief Reply for virtio pci interface dump request
    @param sw_if_index - software index of virtio pci interface
    @param pci_addr - pci address
    @param mac_addr - native virtio device mac address
    @param tx_ring_sz - the number of entries of TX ring
    @param rx_ring_sz - the number of entries of RX ring
    @param features - the virtio features which driver have negotiated with device
*/
define sw_interface_virtio_pci_details
{
  u32 context;
  vl_api_interface_index_t sw_if_index;
  vl_api_pci_address_t pci_addr;
  vl_api_mac_address_t mac_addr;
  u16 tx_ring_sz;
  u16 rx_ring_sz;
  u64 features;
};

/*
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */