diff options
Diffstat (limited to 'nsh-plugin/nsh-md2-ioam')
| -rw-r--r-- | nsh-plugin/nsh-md2-ioam/md2_ioam_transit.c | 191 | ||||
| -rw-r--r-- | nsh-plugin/nsh-md2-ioam/nsh_md2_ioam.c | 513 | ||||
| -rw-r--r-- | nsh-plugin/nsh-md2-ioam/nsh_md2_ioam.h | 119 | ||||
| -rw-r--r-- | nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_api.c | 88 | ||||
| -rw-r--r-- | nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_trace.c | 471 | ||||
| -rw-r--r-- | nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_util.h | 119 |
6 files changed, 1501 insertions, 0 deletions
diff --git a/nsh-plugin/nsh-md2-ioam/md2_ioam_transit.c b/nsh-plugin/nsh-md2-ioam/md2_ioam_transit.c new file mode 100644 index 0000000..72176a8 --- /dev/null +++ b/nsh-plugin/nsh-md2-ioam/md2_ioam_transit.c @@ -0,0 +1,191 @@ + /* + * Copyright (c) 2017 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 <vppinfra/error.h> +#include <vppinfra/hash.h> +#include <vnet/vnet.h> +#include <vnet/ip/ip.h> +#include <vnet/udp/udp.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/lisp-gpe/lisp_gpe.h> +#include <vnet/lisp-gpe/lisp_gpe_packet.h> +#include <nsh/nsh.h> +#include <nsh/nsh_packet.h> +#include <nsh-md2-ioam/nsh_md2_ioam.h> +#include <nsh-md2-ioam/nsh_md2_ioam_util.h> +#include <vnet/fib/ip6_fib.h> +#include <vnet/fib/ip4_fib.h> +#include <vnet/fib/fib_entry.h> + +/* Statistics (not really errors) */ +#define foreach_nsh_md2_ioam_encap_transit_error \ +_(ENCAPSULATED, "good packets encapsulated") + +static char *nsh_md2_ioam_encap_transit_error_strings[] = { +#define _(sym,string) string, + foreach_nsh_md2_ioam_encap_transit_error +#undef _ +}; + +typedef enum +{ +#define _(sym,str) NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_ERROR_##sym, + foreach_nsh_md2_ioam_encap_transit_error +#undef _ + NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_ERROR, +} nsh_md2_ioam_encap_transit_error_t; + +typedef enum +{ + NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT, + NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP, + NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_NEXT +} nsh_md2_ioam_encap_transit_next_t; + + +/* *INDENT-OFF* */ +VNET_FEATURE_INIT (nsh_md2_ioam_encap_transit, static) = +{ + .arc_name = "ip4-output", + .node_name = "nsh-md2-ioam-encap-transit", + .runs_before = VNET_FEATURES ("adj-midchain-tx"), +}; +/* *INDENT-ON* */ + + +static uword +nsh_md2_ioam_encap_transit (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * from_frame) +{ + u32 n_left_from, next_index, *from, *to_next; + + from = vlib_frame_vector_args (from_frame); + n_left_from = 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); + + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 next0 = NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + ip4_header_t *ip0; + u32 iph_offset = 0; + + b0 = vlib_get_buffer (vm, bi0); + iph_offset = vnet_buffer (b0)->ip.save_rewrite_length; + ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + + iph_offset); + + /* just forward non ipv4 packets */ + if (PREDICT_FALSE + ((ip0->ip_version_and_header_length & 0xF0) == 0x40)) + { + /* ipv4 packets */ + udp_header_t *udp_hdr0 = (udp_header_t *) (ip0 + 1); + if (PREDICT_FALSE + ((ip0->protocol == IP_PROTOCOL_UDP) && + (clib_net_to_host_u16 (udp_hdr0->dst_port) == + UDP_DST_PORT_lisp_gpe))) + { + + /* Check the iOAM header */ + lisp_gpe_header_t *lisp_gpe_hdr0 = (lisp_gpe_header_t *) (udp_hdr0 + 1); + nsh_base_header_t *nsh_hdr = (nsh_base_header_t *)(lisp_gpe_hdr0 + 1); + + if (PREDICT_FALSE + (lisp_gpe_hdr0->next_protocol == LISP_GPE_NEXT_PROTO_NSH) && + (nsh_hdr->md_type == 2 )) + { + uword *t = NULL; + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + fib_prefix_t key4; + memset (&key4, 0, sizeof (key4)); + key4.fp_proto = FIB_PROTOCOL_IP4; + key4.fp_addr.ip4.as_u32 = ip0->dst_address.as_u32; + t = hash_get_mem (hm->dst_by_ip4, &key4); + if (t) + { + vlib_buffer_advance (b0, + (word) (sizeof + (ethernet_header_t))); + nsh_md2_ioam_encap_decap_ioam_v4_one_inline (vm, node, + b0, + &next0, + NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP, + 1 + /* use_adj */ + ); + vlib_buffer_advance (b0, + -(word) (sizeof + (ethernet_header_t))); + } + } + } + } + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + return from_frame->n_vectors; +} + +extern u8 * format_nsh_node_map_trace (u8 * s, va_list * args); +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (nsh_md2_ioam_encap_transit_node) = { + .function = nsh_md2_ioam_encap_transit, + .name = "nsh-md2-ioam-encap-transit", + .vector_size = sizeof (u32), + .format_trace = format_nsh_node_map_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(nsh_md2_ioam_encap_transit_error_strings), + .error_strings = nsh_md2_ioam_encap_transit_error_strings, + + .n_next_nodes = NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_NEXT, + + .next_nodes = { + [NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT] = "interface-output", + [NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP] = "error-drop", + }, + +}; +/* *INDENT-ON* */ + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam.c b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam.c new file mode 100644 index 0000000..8f96759 --- /dev/null +++ b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam.c @@ -0,0 +1,513 @@ +/* + * nsh_md2_ioam.c - NSH iOAM functions for MD type 2 + * + * Copyright (c) 2017 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 <vnet/vnet.h> +#include <vnet/plugin/plugin.h> +#include <nsh/nsh.h> +#include <nsh/nsh_packet.h> +#include <vnet/ip/ip.h> +#include <nsh-md2-ioam/nsh_md2_ioam.h> + +#include <vlibapi/api.h> +#include <vlibmemory/api.h> +#include <vlibsocket/api.h> + +#include <vnet/fib/ip6_fib.h> +#include <vnet/fib/ip4_fib.h> +#include <vnet/fib/fib_entry.h> + +/* define message IDs */ +#include <vpp-api/nsh_msg_enum.h> + +/* define message structures */ +#define vl_typedefs +#include <vpp-api/nsh_all_api_h.h> +#undef vl_typedefs + +/* define generated endian-swappers */ +#define vl_endianfun +#include <vpp-api/nsh_all_api_h.h> +#undef vl_endianfun + +nsh_md2_ioam_main_t nsh_md2_ioam_main; + +static void +nsh_md2_ioam_set_clear_output_feature_on_intf (vlib_main_t * vm, + u32 sw_if_index0, + u8 is_add) +{ + + + + vnet_feature_enable_disable ("ip4-output", + "nsh-md2-ioam-encap-transit", + sw_if_index0, is_add, + 0 /* void *feature_config */ , + 0 /* u32 n_feature_config_bytes */ ); + return; +} + +void +nsh_md2_ioam_clear_output_feature_on_all_intfs (vlib_main_t * vm) +{ + vnet_sw_interface_t *si = 0; + vnet_main_t *vnm = vnet_get_main (); + vnet_interface_main_t *im = &vnm->interface_main; + + pool_foreach (si, im->sw_interfaces, ( + { + nsh_md2_ioam_set_clear_output_feature_on_intf + (vm, si->sw_if_index, 0); + })); + return; +} + + +extern fib_forward_chain_type_t +fib_entry_get_default_chain_type (const fib_entry_t * fib_entry); + +int +nsh_md2_ioam_enable_disable_for_dest (vlib_main_t * vm, + ip46_address_t dst_addr, + u32 outer_fib_index, + u8 is_ipv4, u8 is_add) +{ + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + u32 fib_index0 = 0; + + fib_node_index_t fei = ~0; + u32 *sw_if_index0 = NULL; +#if 0 + fib_entry_t *fib_entry; + u32 adj_index0; + ip_adjacency_t *adj0; + load_balance_t *lb_m, *lb_b; + const dpo_id_t *dpo0, *dpo1; + u32 i, j, k; +#endif + u32 *intf_list = NULL; + fib_prefix_t fib_prefix; + + if (is_ipv4) + { + memset (&fib_prefix, 0, sizeof (fib_prefix_t)); + fib_prefix.fp_len = 32; + fib_prefix.fp_proto = FIB_PROTOCOL_IP4; +#define TRANSIT_UNIT_TEST_HACK 1 +#ifdef TRANSIT_UNIT_TEST_HACK + memset(&dst_addr, 0, sizeof(dst_addr)); + dst_addr.ip4.as_u32 = clib_net_to_host_u32(0x14020102); +#endif + fib_prefix.fp_addr = dst_addr; + } + else + { + return 0; + } + + fei = fib_table_lookup (fib_index0, &fib_prefix); +#if 0 + fib_entry = fib_entry_get (fei); + + + if (!dpo_id_is_valid (&fib_entry->fe_lb)) + { + return (-1); + } + + lb_m = load_balance_get (fib_entry->fe_lb.dpoi_index); + + for (i = 0; i < lb_m->lb_n_buckets; i++) + { + dpo0 = load_balance_get_bucket_i (lb_m, i); + + if (dpo0->dpoi_type == DPO_LOAD_BALANCE || + dpo0->dpoi_type == DPO_ADJACENCY) + { + if (dpo0->dpoi_type == DPO_ADJACENCY) + { + k = 1; + } + else + { + lb_b = load_balance_get (dpo0->dpoi_index); + k = lb_b->lb_n_buckets; + } + + for (j = 0; j < k; j++) + { + if (dpo0->dpoi_type == DPO_ADJACENCY) + { + dpo1 = dpo0; + } + else + { + dpo1 = load_balance_get_bucket_i (lb_b, j); + } + + if (dpo1->dpoi_type == DPO_ADJACENCY) + { + adj_index0 = dpo1->dpoi_index; + + if (ADJ_INDEX_INVALID == adj_index0) + { + continue; + } + + adj0 = + ip_get_adjacency (&(ip4_main.lookup_main), adj_index0); + sw_if_index0 = adj0->rewrite_header.sw_if_index; + + if (~0 == sw_if_index0) + { + continue; + } + + + if (is_add) + { + vnet_feature_enable_disable ("ip4-output", + "nsh-md2-ioam-encap-transit", + sw_if_index0, is_add, 0, + /* void *feature_config */ + 0 /* u32 n_feature_config_bytes */ + ); + + vec_validate_init_empty (hm->bool_ref_by_sw_if_index, + sw_if_index0, ~0); + hm->bool_ref_by_sw_if_index[sw_if_index0] = 1; + } + else + { + hm->bool_ref_by_sw_if_index[sw_if_index0] = ~0; + } + } + } + } + } +#else + +u32 fib_path_get_resolving_interface (fib_node_index_t path_index); + vec_add1(intf_list, fib_path_get_resolving_interface(fei)); + vec_foreach(sw_if_index0, intf_list) + if (is_add) + { + vnet_feature_enable_disable ("ip4-output", + "nsh-md2-ioam-encap-transit", + *sw_if_index0, is_add, 0, + /* void *feature_config */ + 0 /* u32 n_feature_config_bytes */ + ); + + vec_validate_init_empty (hm->bool_ref_by_sw_if_index, + *sw_if_index0, ~0); + hm->bool_ref_by_sw_if_index[*sw_if_index0] = 1; + } + else + { + hm->bool_ref_by_sw_if_index[*sw_if_index0] = ~0; + } + +#endif + + if (is_ipv4) + { + uword *t = NULL; + nsh_md2_ioam_dest_tunnels_t *t1; + fib_prefix_t key4, *key4_copy; + hash_pair_t *hp; + memset (&key4, 0, sizeof (key4)); + key4.fp_proto = FIB_PROTOCOL_IP4; + key4.fp_addr.ip4.as_u32 = fib_prefix.fp_addr.ip4.as_u32; + t = hash_get_mem (hm->dst_by_ip4, &key4); + if (is_add) + { + if (t) + { + return 0; + } + pool_get_aligned (hm->dst_tunnels, t1, CLIB_CACHE_LINE_BYTES); + memset (t1, 0, sizeof (*t1)); + t1->fp_proto = FIB_PROTOCOL_IP4; + t1->dst_addr.ip4.as_u32 = fib_prefix.fp_addr.ip4.as_u32; + key4_copy = clib_mem_alloc (sizeof (*key4_copy)); + memset(key4_copy, 0, sizeof(*key4_copy)); + clib_memcpy (key4_copy, &key4, sizeof (*key4_copy)); + hash_set_mem (hm->dst_by_ip4, key4_copy, t1 - hm->dst_tunnels); + /* + * Attach to the FIB entry for the VxLAN-GPE destination + * and become its child. The dest route will invoke a callback + * when the fib entry changes, it can be used to + * re-program the output feature on the egress interface. + */ + + const fib_prefix_t tun_dst_pfx = { + .fp_len = 32, + .fp_proto = FIB_PROTOCOL_IP4, + .fp_addr = {.ip4 = t1->dst_addr.ip4,} + }; + + t1->fib_entry_index = + fib_table_entry_special_add (outer_fib_index, + &tun_dst_pfx, + FIB_SOURCE_RR, + FIB_ENTRY_FLAG_NONE, + ADJ_INDEX_INVALID); + t1->sibling_index = + fib_entry_child_add (t1->fib_entry_index, + hm->fib_entry_type, t1 - hm->dst_tunnels); + t1->outer_fib_index = outer_fib_index; + + } + else + { + if (!t) + { + return 0; + } + t1 = pool_elt_at_index (hm->dst_tunnels, t[0]); + hp = hash_get_pair (hm->dst_by_ip4, &key4); + key4_copy = (void *) (hp->key); + hash_unset_mem (hm->dst_by_ip4, &key4); + clib_mem_free (key4_copy); + pool_put (hm->dst_tunnels, t1); + } + } + else + { + // TBD for IPv6 + } + + return 0; +} + +void +nsh_md2_ioam_refresh_output_feature_on_all_dest (void) +{ + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + nsh_main_t *gm = &nsh_main; + nsh_md2_ioam_dest_tunnels_t *t; + u32 i; + + if (pool_elts (hm->dst_tunnels) == 0) + return; + + nsh_md2_ioam_clear_output_feature_on_all_intfs (gm->vlib_main); + i = vec_len (hm->bool_ref_by_sw_if_index); + vec_free (hm->bool_ref_by_sw_if_index); + vec_validate_init_empty (hm->bool_ref_by_sw_if_index, i, ~0); + pool_foreach (t, hm->dst_tunnels, ( + { + nsh_md2_ioam_enable_disable_for_dest + (gm->vlib_main, + t->dst_addr, + t->outer_fib_index, + (t->fp_proto == FIB_PROTOCOL_IP4), 1 + /* is_add */ + ); + } + )); + return; +} + +void +nsh_md2_ioam_clear_output_feature_on_select_intfs (void) +{ + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + nsh_main_t *gm = &nsh_main; + + u32 sw_if_index0 = 0; + for (sw_if_index0 = 0; + sw_if_index0 < vec_len (hm->bool_ref_by_sw_if_index); sw_if_index0++) + { + if (hm->bool_ref_by_sw_if_index[sw_if_index0] == 0xFF) + { + nsh_md2_ioam_set_clear_output_feature_on_intf + (gm->vlib_main, sw_if_index0, 0); + } + } + + return; +} + + + + +clib_error_t * +nsh_md2_ioam_enable_disable (int has_trace_option, int has_pot_option, + int has_ppc_option) +{ + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + + hm->has_trace_option = has_trace_option; + hm->has_pot_option = has_pot_option; + hm->has_ppc_option = has_ppc_option; + + if (hm->has_trace_option) + { + nsh_md2_ioam_trace_profile_setup (); + } + else if (!hm->has_trace_option) + { + nsh_md2_ioam_trace_profile_cleanup (); + } + + return 0; +} + + +int nsh_md2_ioam_disable_for_dest + (vlib_main_t * vm, ip46_address_t dst_addr, u32 outer_fib_index, + u8 ipv4_set) +{ + nsh_md2_ioam_dest_tunnels_t *t; + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + nsh_main_t *gm = &nsh_main; + + nsh_md2_ioam_enable_disable_for_dest (gm->vlib_main, + dst_addr, outer_fib_index, + ipv4_set, 0); + if (pool_elts (hm->dst_tunnels) == 0) + { + nsh_md2_ioam_clear_output_feature_on_select_intfs (); + return 0; + } + + pool_foreach (t, hm->dst_tunnels, ( + { + nsh_md2_ioam_enable_disable_for_dest + (gm->vlib_main, + t->dst_addr, + t->outer_fib_index, + (t->fp_proto == + FIB_PROTOCOL_IP4), 1 /* is_add */ ); + } + )); + nsh_md2_ioam_clear_output_feature_on_select_intfs (); + return (0); + +} + +static clib_error_t *nsh_md2_ioam_set_transit_rewrite_command_fn + (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) +{ + nsh_main_t *gm = &nsh_main; + ip46_address_t dst_addr; + u8 dst_addr_set = 0; + u8 ipv4_set = 0; + u8 ipv6_set = 0; + u8 disable = 0; + clib_error_t *rv = 0; + u32 outer_fib_index = 0; + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "dst-ip %U", unformat_ip4_address, &dst_addr.ip4)) + { + dst_addr_set = 1; + ipv4_set = 1; + } + else + if (unformat + (input, "dst-ip %U", unformat_ip6_address, &dst_addr.ip6)) + { + dst_addr_set = 1; + ipv6_set = 1; + } + else if (unformat (input, "outer-fib-index %d", &outer_fib_index)) + { + } + + else if (unformat (input, "disable")) + disable = 1; + else + break; + } + + if (dst_addr_set == 0) + return clib_error_return (0, + "LISP-GPE Tunnel destination address not specified"); + if (ipv4_set && ipv6_set) + return clib_error_return (0, "both IPv4 and IPv6 addresses specified"); + if (!disable) + { + nsh_md2_ioam_enable_disable_for_dest (gm->vlib_main, + dst_addr, outer_fib_index, + ipv4_set, 1); + } + else + { + nsh_md2_ioam_disable_for_dest + (vm, dst_addr, outer_fib_index, ipv4_set); + } + return rv; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (nsh_md2_ioam_set_transit_rewrite_cmd, static) = { + .path = "set nsh-md2-ioam-transit", + .short_help = "set nsh-ioam-lisp-gpe-transit dst-ip <dst_ip> [outer-fib-index <outer_fib_index>] [disable]", + .function = nsh_md2_ioam_set_transit_rewrite_command_fn, +}; + +/** + * Function definition to backwalk a FIB node + */ +static fib_node_back_walk_rc_t +nsh_md2_ioam_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx) +{ + nsh_md2_ioam_refresh_output_feature_on_all_dest (); + return (FIB_NODE_BACK_WALK_CONTINUE); +} + +/** + * Function definition to get a FIB node from its index + */ +static fib_node_t * +nsh_md2_ioam_fib_node_get (fib_node_index_t index) +{ + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + return (&hm->node); +} + +/** + * Function definition to inform the FIB node that its last lock has gone. + */ +static void +nsh_md2_ioam_last_lock_gone (fib_node_t * node) +{ + ASSERT (0); +} + + +/* + * Virtual function table registered by MPLS GRE tunnels + * for participation in the FIB object graph. + */ +const static fib_node_vft_t nsh_md2_ioam_vft = { + .fnv_get = nsh_md2_ioam_fib_node_get, + .fnv_last_lock = nsh_md2_ioam_last_lock_gone, + .fnv_back_walk = nsh_md2_ioam_back_walk, +}; + +void +nsh_md2_ioam_interface_init (void) +{ + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + hm->fib_entry_type = fib_node_register_new_type (&nsh_md2_ioam_vft); + return; +} + diff --git a/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam.h b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam.h new file mode 100644 index 0000000..3d48fde --- /dev/null +++ b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam.h @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2017 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_nsh_md2_ioam_h__ +#define __included_nsh_md2_ioam_h__ + +#include <nsh/nsh.h> +#include <nsh/nsh_packet.h> +#include <vnet/ip/ip.h> +#include <vnet/ip/ip4_packet.h> +#include <vnet/ip/ip6_packet.h> + + +typedef struct nsh_md2_ioam_sw_interface_ +{ + u32 sw_if_index; +} nsh_md2_ioam_sw_interface_t; + +typedef struct nsh_md2_ioam_dest_tunnels_ +{ + ip46_address_t dst_addr; + u32 fp_proto; + u32 sibling_index; + fib_node_index_t fib_entry_index; + u32 outer_fib_index; +} nsh_md2_ioam_dest_tunnels_t; + +typedef struct nsh_md2_ioam_main_ +{ + /** + * Linkage into the FIB object graph + */ + fib_node_t node; + + /* time scale transform. Joy. */ + u32 unix_time_0; + f64 vlib_time_0; + + + /* Trace option */ + u8 has_trace_option; + + /* Pot option */ + u8 has_pot_option; + +#define PPC_NONE 0 +#define PPC_ENCAP 1 +#define PPC_DECAP 2 + u8 has_ppc_option; + +#define TSP_SECONDS 0 +#define TSP_MILLISECONDS 1 +#define TSP_MICROSECONDS 2 +#define TSP_NANOSECONDS 3 + + + /* API message ID base */ + u16 msg_id_base; + + /* Override to export for iOAM */ + uword decap_v4_next_override; + uword decap_v6_next_override; + + /* sequence of node graph for encap */ + uword encap_v4_next_node; + uword encap_v6_next_node; + + /* Software interfaces. */ + nsh_md2_ioam_sw_interface_t *sw_interfaces; + + /* hash ip4/ip6 -> list of destinations for doing transit iOAM operation */ + nsh_md2_ioam_dest_tunnels_t *dst_tunnels; + uword *dst_by_ip4; + uword *dst_by_ip6; + + /** per sw_if_index, to maintain bitmap */ + u8 *bool_ref_by_sw_if_index; + fib_node_type_t fib_entry_type; + + +} nsh_md2_ioam_main_t; +extern nsh_md2_ioam_main_t nsh_md2_ioam_main; + +/* + * Primary h-b-h handler trace support + */ +typedef struct +{ + u32 next_index; + u32 trace_len; + u8 option_data[256]; +} ioam_trace_t; + + +clib_error_t *nsh_md2_ioam_enable_disable (int has_trace_option, + int has_pot_option, + int has_ppc_option); + + + +int nsh_md2_ioam_trace_profile_setup (void); + +int nsh_md2_ioam_trace_profile_cleanup (void); +extern void nsh_md2_ioam_interface_init (void); + + + +#endif diff --git a/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_api.c b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_api.c new file mode 100644 index 0000000..42172cb --- /dev/null +++ b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_api.c @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2016 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. + */ +/* + *----------------------------------------------------------------------- + * nsh_md2_ioam_api.c - iOAM for NSH/LISP-GPE related APIs to create + * and maintain profiles + *----------------------------------------------------------------------- + */ + +#include <vnet/vnet.h> +#include <vlib/unix/plugin.h> +#include <vnet/plugin/plugin.h> +#include <nsh-md2-ioam/nsh_md2_ioam.h> + +#include <vlibapi/api.h> +#include <vlibmemory/api.h> +#include <vlibsocket/api.h> + +/* define message IDs */ +#include <vpp-api/nsh_msg_enum.h> + +/* define message structures */ +#define vl_typedefs +#include <vpp-api/nsh_all_api_h.h> +#undef vl_typedefs + +/* define generated endian-swappers */ +#define vl_endianfun +#include <vpp-api/nsh_all_api_h.h> +#undef vl_endianfun + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) +#define vl_printfun +#include <vpp-api/nsh_all_api_h.h> +#undef vl_printfun + +/* Get the API version number */ +#if 0 +#define vl_api_version(n,v) static u32 api_version=(v); +#include <vpp-api/nsh_all_api_h.h> +#undef vl_api_version +#endif + +u8 *nsh_trace_main = NULL; +static clib_error_t * +nsh_md2_ioam_init (vlib_main_t * vm) +{ + nsh_md2_ioam_main_t *sm = &nsh_md2_ioam_main; + clib_error_t *error = 0; + + nsh_trace_main = + (u8 *) vlib_get_plugin_symbol ("ioam_plugin.so", "trace_main"); + + if (!nsh_trace_main) + return error; + + vec_new (nsh_md2_ioam_sw_interface_t, pool_elts (sm->sw_interfaces)); + sm->dst_by_ip4 = hash_create_mem (0, sizeof (fib_prefix_t), sizeof (uword)); + + sm->dst_by_ip6 = hash_create_mem (0, sizeof (fib_prefix_t), sizeof (uword)); + + nsh_md2_ioam_interface_init (); + + return error; +} + +VLIB_INIT_FUNCTION (nsh_md2_ioam_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_trace.c b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_trace.c new file mode 100644 index 0000000..13bf433 --- /dev/null +++ b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_trace.c @@ -0,0 +1,471 @@ +/* + * Copyright (c) 2017 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vppinfra/error.h> + +#include <vppinfra/hash.h> +#include <vppinfra/error.h> +#include <vppinfra/elog.h> + +#include <ioam/lib-trace/trace_util.h> +#include <nsh-md2-ioam/nsh_md2_ioam.h> +#include <nsh/nsh_packet.h> + +/* Timestamp precision multipliers for seconds, milliseconds, microseconds + * and nanoseconds respectively. + */ +static f64 trace_tsp_mul[4] = { 1, 1e3, 1e6, 1e9 }; +#define NSH_MD2_IOAM_TRACE_SIZE_DUMMY 20 + +typedef union +{ + u64 as_u64; + u32 as_u32[2]; +} time_u64_t; + + +/* *INDENT-OFF* */ +typedef CLIB_PACKED(struct { + u16 class; + u8 type; + u8 length; + u8 data_list_elts_left; + u16 ioam_trace_type; + u8 reserve; + u32 elts[0]; /* Variable type. So keep it generic */ +}) nsh_md2_ioam_trace_option_t; +/* *INDENT-ON* */ + + +#define foreach_nsh_md2_ioam_trace_stats \ + _(SUCCESS, "Pkts updated with TRACE records") \ + _(FAILED, "Errors in TRACE due to lack of TRACE records") + +static char *nsh_md2_ioam_trace_stats_strings[] = { +#define _(sym,string) string, + foreach_nsh_md2_ioam_trace_stats +#undef _ +}; + +typedef enum +{ +#define _(sym,str) NSH_MD2_IOAM_TRACE_##sym, + foreach_nsh_md2_ioam_trace_stats +#undef _ + NSH_MD2_IOAM_TRACE_N_STATS, +} nsh_md2_ioam_trace_stats_t; + + +typedef struct +{ + /* stats */ + u64 counters[ARRAY_LEN (nsh_md2_ioam_trace_stats_strings)]; + + /* convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +} nsh_md2_ioam_trace_main_t; + +nsh_md2_ioam_trace_main_t nsh_md2_ioam_trace_main; + +/* + * Find a trace profile + */ + +extern u8 *nsh_trace_main; +always_inline trace_profile * +nsh_trace_profile_find (void) +{ + trace_main_t *sm = (trace_main_t *) nsh_trace_main; + + return (&(sm->profile)); +} + + +always_inline void +nsh_md2_ioam_trace_stats_increment_counter (u32 counter_index, + u64 increment) +{ + nsh_md2_ioam_trace_main_t *hm = &nsh_md2_ioam_trace_main; + + hm->counters[counter_index] += increment; +} + + +static u8 * +format_ioam_data_list_element (u8 * s, va_list * args) +{ + u32 *elt = va_arg (*args, u32 *); + u8 *trace_type_p = va_arg (*args, u8 *); + u8 trace_type = *trace_type_p; + + + if (trace_type & BIT_TTL_NODEID) + { + u32 ttl_node_id_host_byte_order = clib_net_to_host_u32 (*elt); + s = format (s, "ttl 0x%x node id 0x%x ", + ttl_node_id_host_byte_order >> 24, + ttl_node_id_host_byte_order & 0x00FFFFFF); + + elt++; + } + + if (trace_type & BIT_ING_INTERFACE && trace_type & BIT_ING_INTERFACE) + { + u32 ingress_host_byte_order = clib_net_to_host_u32 (*elt); + s = format (s, "ingress 0x%x egress 0x%x ", + ingress_host_byte_order >> 16, + ingress_host_byte_order & 0xFFFF); + elt++; + } + + if (trace_type & BIT_TIMESTAMP) + { + u32 ts_in_host_byte_order = clib_net_to_host_u32 (*elt); + s = format (s, "ts 0x%x \n", ts_in_host_byte_order); + elt++; + } + + if (trace_type & BIT_APPDATA) + { + u32 appdata_in_host_byte_order = clib_net_to_host_u32 (*elt); + s = format (s, "app 0x%x ", appdata_in_host_byte_order); + elt++; + } + + return s; +} + + + +int +nsh_md2_ioam_trace_rewrite_handler (u8 * rewrite_string, + u8 * rewrite_size) +{ + nsh_md2_ioam_trace_option_t *trace_option = NULL; + u8 trace_data_size = 0; + u8 trace_option_elts = 0; + trace_profile *profile = NULL; + + profile = nsh_trace_profile_find (); + + if (PREDICT_FALSE (!profile)) + { + return (-1); + } + + if (PREDICT_FALSE (!rewrite_string)) + return -1; + + trace_option_elts = profile->num_elts; + trace_data_size = fetch_trace_data_size (profile->trace_type); + + trace_option = (nsh_md2_ioam_trace_option_t *) rewrite_string; + trace_option->class = clib_host_to_net_u16(0x9); + trace_option->type = NSH_MD2_IOAM_OPTION_TYPE_TRACE; + trace_option->length = (trace_option_elts * trace_data_size) + 4; + trace_option->data_list_elts_left = trace_option_elts; + trace_option->ioam_trace_type = + clib_host_to_net_u16(profile->trace_type & TRACE_TYPE_MASK); + + *rewrite_size = + sizeof (nsh_md2_ioam_trace_option_t) + + (trace_option_elts * trace_data_size); + + return 0; +} + + +int +nsh_md2_ioam_trace_data_list_handler (vlib_buffer_t * b, + nsh_tlv_header_t * opt) +{ + u8 elt_index = 0; + nsh_md2_ioam_trace_option_t *trace = + (nsh_md2_ioam_trace_option_t *) ((u8 *)opt); + time_u64_t time_u64; + u32 *elt; + int rv = 0; + trace_profile *profile = NULL; + nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main; + nsh_main_t *gm = &nsh_main; + u16 ioam_trace_type = 0; + + profile = nsh_trace_profile_find (); + + if (PREDICT_FALSE (!profile)) + { + return (-1); + } + + + ioam_trace_type = profile->trace_type & TRACE_TYPE_MASK; + time_u64.as_u64 = 0; + + if (PREDICT_TRUE (trace->data_list_elts_left)) + { + trace->data_list_elts_left--; + /* fetch_trace_data_size returns in bytes. Convert it to 4-bytes + * to skip to this node's location. + */ + elt_index = + trace->data_list_elts_left * + fetch_trace_data_size (ioam_trace_type) / 4; + elt = &trace->elts[elt_index]; + if (ioam_trace_type & BIT_TTL_NODEID) + { + ip4_header_t *ip0 = vlib_buffer_get_current (b); + *elt = clib_host_to_net_u32 (((ip0->ttl - 1) << 24) | + profile->node_id); + elt++; + } + + if (ioam_trace_type & BIT_ING_INTERFACE) + { + u16 tx_if = vnet_buffer(b)->sw_if_index[VLIB_TX]; + + *elt = + (vnet_buffer (b)->sw_if_index[VLIB_RX] & 0xFFFF) << 16 | + tx_if; + *elt = clib_host_to_net_u32 (*elt); + elt++; + } + + + if (ioam_trace_type & BIT_TIMESTAMP) + { + /* Send least significant 32 bits */ + f64 time_f64 = + (f64) (((f64) hm->unix_time_0) + + (vlib_time_now (gm->vlib_main) - hm->vlib_time_0)); + + time_u64.as_u64 = time_f64 * trace_tsp_mul[profile->trace_tsp]; + *elt = clib_host_to_net_u32 (time_u64.as_u32[0]); + elt++; + } + + if (ioam_trace_type & BIT_APPDATA) + { + /* $$$ set elt0->app_data */ + *elt = clib_host_to_net_u32 (profile->app_data); + elt++; + } + nsh_md2_ioam_trace_stats_increment_counter + (NSH_MD2_IOAM_TRACE_SUCCESS, 1); + } + else + { + nsh_md2_ioam_trace_stats_increment_counter + (NSH_MD2_IOAM_TRACE_FAILED, 1); + } + return (rv); +} + + + +u8 * +nsh_md2_ioam_trace_data_list_trace_handler (u8 * s, + nsh_tlv_header_t * opt) +{ + nsh_md2_ioam_trace_option_t *trace; + u8 trace_data_size_in_words = 0; + u32 *elt; + int elt_index = 0; + u16 ioam_trace_type = 0; + + trace = (nsh_md2_ioam_trace_option_t *) ((u8 *)opt); + ioam_trace_type = clib_net_to_host_u16(trace->ioam_trace_type); + trace_data_size_in_words = + fetch_trace_data_size (ioam_trace_type) / 4; + elt = &trace->elts[0]; + s = + format (s, " Trace Type 0x%x , %d elts left\n", ioam_trace_type, + trace->data_list_elts_left); + while ((u8 *) elt < ((u8 *) (&trace->elts[0]) + trace->length - 4 + /* -2 accounts for ioam_trace_type,elts_left */ )) + { + s = format (s, " [%d] %U\n", elt_index, + format_ioam_data_list_element, + elt, &ioam_trace_type); + elt_index++; + elt += trace_data_size_in_words; + } + return (s); +} + +int +nsh_md2_ioam_trace_swap_handler (vlib_buffer_t * b, + nsh_tlv_header_t * old_opt, + nsh_tlv_header_t * new_opt) +{ + + clib_memcpy(new_opt, old_opt, new_opt->length + sizeof(nsh_tlv_header_t)); + return nsh_md2_ioam_trace_data_list_handler (b, new_opt); +} + +static clib_error_t * +nsh_md2_ioam_show_ioam_trace_cmd_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + nsh_md2_ioam_trace_main_t *hm = &nsh_md2_ioam_trace_main; + u8 *s = 0; + int i = 0; + + for (i = 0; i < NSH_MD2_IOAM_TRACE_N_STATS; i++) + { + s = format (s, " %s - %lu\n", nsh_md2_ioam_trace_stats_strings[i], + hm->counters[i]); + } + + vlib_cli_output (vm, "%v", s); + vec_free (s); + return 0; +} + + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (nsh_md2_ioam_show_ioam_trace_cmd, static) = { + .path = "show ioam nsh-lisp-gpe trace", + .short_help = "iOAM trace statistics", + .function = nsh_md2_ioam_show_ioam_trace_cmd_fn, +}; +/* *INDENT-ON* */ + + +int +nsh_md2_ioam_trace_pop_handler (vlib_buffer_t * b, + nsh_tlv_header_t * opt) +{ + return nsh_md2_ioam_trace_data_list_handler (b, opt); +} + +static clib_error_t * +nsh_md2_ioam_trace_init (vlib_main_t * vm) +{ + nsh_md2_ioam_trace_main_t *hm = &nsh_md2_ioam_trace_main; + nsh_md2_ioam_main_t *gm = &nsh_md2_ioam_main; + clib_error_t *error; + + if ((error = vlib_call_init_function (vm, nsh_init))) + return (error); + + if ((error = vlib_call_init_function (vm, nsh_md2_ioam_init))) + return (error); + + hm->vlib_main = vm; + hm->vnet_main = vnet_get_main (); + gm->unix_time_0 = (u32) time (0); /* Store starting time */ + gm->vlib_time_0 = vlib_time_now (vm); + + memset (hm->counters, 0, sizeof (hm->counters)); + + if (nsh_md2_register_option + (clib_host_to_net_u16(0x9), + NSH_MD2_IOAM_OPTION_TYPE_TRACE, + NSH_MD2_IOAM_TRACE_SIZE_DUMMY, + nsh_md2_ioam_trace_rewrite_handler, + nsh_md2_ioam_trace_data_list_handler, + nsh_md2_ioam_trace_swap_handler, + nsh_md2_ioam_trace_pop_handler, + nsh_md2_ioam_trace_data_list_trace_handler) < 0) + return (clib_error_create + ("registration of NSH_MD2_IOAM_OPTION_TYPE_TRACE failed")); + + return (0); +} + +VLIB_INIT_FUNCTION (nsh_md2_ioam_trace_init); + +int +nsh_md2_ioam_trace_profile_cleanup (void) +{ + nsh_main_t *hm = &nsh_main; + + hm->options_size[NSH_MD2_IOAM_OPTION_TYPE_TRACE] = 0; + + return 0; + +} + +static int +nsh_md2_ioam_trace_get_sizeof_handler (u32 * result) +{ + u16 size = 0; + u8 trace_data_size = 0; + trace_profile *profile = NULL; + + *result = 0; + + profile = nsh_trace_profile_find (); + + if (PREDICT_FALSE (!profile)) + { + return (-1); + } + + trace_data_size = fetch_trace_data_size (profile->trace_type); + if (PREDICT_FALSE (trace_data_size == 0)) + return VNET_API_ERROR_INVALID_VALUE; + + if (PREDICT_FALSE (profile->num_elts * trace_data_size > 254)) + return VNET_API_ERROR_INVALID_VALUE; + + size += + sizeof (nsh_md2_ioam_trace_option_t) + + profile->num_elts * trace_data_size; + *result = size; + + return 0; +} + + +int +nsh_md2_ioam_trace_profile_setup (void) +{ + u32 trace_size = 0; + nsh_main_t *hm = &nsh_main; + + trace_profile *profile = NULL; + + + profile = nsh_trace_profile_find (); + + if (PREDICT_FALSE (!profile)) + { + return (-1); + } + + + if (nsh_md2_ioam_trace_get_sizeof_handler (&trace_size) < 0) + return (-1); + + hm->options_size[NSH_MD2_IOAM_OPTION_TYPE_TRACE] = trace_size; + + return (0); +} + + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ + diff --git a/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_util.h b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_util.h new file mode 100644 index 0000000..a4fb874 --- /dev/null +++ b/nsh-plugin/nsh-md2-ioam/nsh_md2_ioam_util.h @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2017 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_nsh_md2_ioam_util_h__ +#define __included_nsh_md2_ioam_util_h__ + +#include <vnet/lisp-gpe/lisp_gpe.h> +#include <vnet/lisp-gpe/lisp_gpe_packet.h> +#include <vnet/ip/ip.h> +#include <nsh/nsh.h> +#include <nsh-md2-ioam/nsh_md2_ioam.h> +#include <nsh/nsh_packet.h> + + +extern nsh_option_map_t * nsh_md2_lookup_option (u16 class, u8 type); + + +typedef struct { + u8 trace_data[256]; +} nsh_transit_trace_t; + +always_inline void +nsh_md2_ioam_encap_decap_ioam_v4_one_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_buffer_t * b0, + u32 * next0, u32 drop_node_val, + u8 use_adj) +{ + ip4_header_t *ip0; + udp_header_t *udp_hdr0; + lisp_gpe_header_t *lisp_gpe_hdr0; + nsh_base_header_t *nsh_hdr; + nsh_tlv_header_t *opt0; + nsh_tlv_header_t *limit0; + nsh_main_t *hm = &nsh_main; + nsh_option_map_t *nsh_option; + + /* Populate the iOAM header */ + ip0 = vlib_buffer_get_current (b0); + udp_hdr0 = (udp_header_t *) (ip0 + 1); + lisp_gpe_hdr0 = (lisp_gpe_header_t *) (udp_hdr0 + 1); + nsh_hdr = (nsh_base_header_t *)(lisp_gpe_hdr0 + 1); + opt0 = (nsh_tlv_header_t *) (nsh_hdr + 1); + limit0 = (nsh_tlv_header_t *) ((u8 *) opt0 + (nsh_hdr->length *4) - sizeof(nsh_base_header_t)); + + /* + * Basic validity checks + */ + if ((nsh_hdr->length*4) > clib_net_to_host_u16 (ip0->length)) + { + *next0 = drop_node_val; + return; + } + + if (nsh_hdr->md_type != 2) + { + *next0 = drop_node_val; + return; + } + + /* Scan the set of h-b-h options, process ones that we understand */ + while (opt0 < limit0) + { + u8 type0; + type0 = opt0->type; + switch (type0) + { + case 0: /* Pad1 */ + opt0 = (nsh_tlv_header_t *) ((u8 *) opt0) + 1; + continue; + case 1: /* PadN */ + break; + default: + nsh_option = nsh_md2_lookup_option(opt0->class, opt0->type); + if(( nsh_option != NULL) && (hm->options[nsh_option->option_id])) + { + if ((*hm->options[nsh_option->option_id]) (b0, opt0) < 0) + { + *next0 = drop_node_val; + return; + } + } + break; + } + opt0 = + (nsh_tlv_header_t *) (((u8 *) opt0) + opt0->length + + sizeof (nsh_tlv_header_t)); + } + + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_transit_trace_t *tr = vlib_add_trace(vm, node, b0, sizeof(*tr)); + clib_memcpy ( &(tr->trace_data), nsh_hdr, (nsh_hdr->length*4) ); + } + return; +} + + +#endif + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |