diff options
Diffstat (limited to 'src/vnet/ip/ip6_hop_by_hop.c')
| -rw-r--r-- | src/vnet/ip/ip6_hop_by_hop.c | 1194 |
1 files changed, 1194 insertions, 0 deletions
diff --git a/src/vnet/ip/ip6_hop_by_hop.c b/src/vnet/ip/ip6_hop_by_hop.c new file mode 100644 index 00000000000..3a820b3cefc --- /dev/null +++ b/src/vnet/ip/ip6_hop_by_hop.c @@ -0,0 +1,1194 @@ +/* + * 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. + */ +#include <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vppinfra/error.h> + +#include <vnet/ip/ip.h> + +#include <vppinfra/hash.h> +#include <vppinfra/error.h> +#include <vppinfra/elog.h> + +#include <vnet/ip/ip6_hop_by_hop.h> +#include <vnet/fib/ip6_fib.h> +#include <vnet/classify/vnet_classify.h> + +/** + * @file + * @brief In-band OAM (iOAM). + * + * In-band OAM (iOAM) is an implementation study to record operational + * information in the packet while the packet traverses a path between + * two points in the network. + * + * VPP can function as in-band OAM encapsulating, transit and + * decapsulating node. In this version of VPP in-band OAM data is + * transported as options in an IPv6 hop-by-hop extension header. Hence + * in-band OAM can be enabled for IPv6 traffic. + */ + +ip6_hop_by_hop_ioam_main_t ip6_hop_by_hop_ioam_main; + +#define foreach_ip6_hbyh_ioam_input_next \ + _(IP6_REWRITE, "ip6-rewrite") \ + _(IP6_LOOKUP, "ip6-lookup") \ + _(DROP, "error-drop") + +typedef enum +{ +#define _(s,n) IP6_HBYH_IOAM_INPUT_NEXT_##s, + foreach_ip6_hbyh_ioam_input_next +#undef _ + IP6_HBYH_IOAM_INPUT_N_NEXT, +} ip6_hbyh_ioam_input_next_t; + + +u32 +ioam_flow_add (u8 encap, u8 * flow_name) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + flow_data_t *flow = 0; + u32 index = 0; + u8 i; + + pool_get (hm->flows, flow); + memset (flow, 0, sizeof (flow_data_t)); + + index = flow - hm->flows; + strncpy ((char *) flow->flow_name, (char *) flow_name, 31); + + if (!encap) + IOAM_SET_DECAP (index); + + for (i = 0; i < 255; i++) + { + if (hm->flow_handler[i]) + flow->ctx[i] = hm->flow_handler[i] (index, 1); + } + return (index); +} + +static uword +unformat_opaque_ioam (unformat_input_t * input, va_list * args) +{ + u64 *opaquep = va_arg (*args, u64 *); + u8 *flow_name = NULL; + uword ret = 0; + + if (unformat (input, "ioam-encap %s", &flow_name)) + { + *opaquep = ioam_flow_add (1, flow_name); + ret = 1; + } + else if (unformat (input, "ioam-decap %s", &flow_name)) + { + *opaquep = ioam_flow_add (0, flow_name); + ret = 1; + } + + vec_free (flow_name); + return ret; +} + +u8 * +get_flow_name_from_flow_ctx (u32 flow_ctx) +{ + flow_data_t *flow = NULL; + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + u32 index; + + index = IOAM_MASK_DECAP_BIT (flow_ctx); + + if (pool_is_free_index (hm->flows, index)) + return NULL; + + flow = pool_elt_at_index (hm->flows, index); + return (flow->flow_name); +} + +/* The main h-b-h tracer will be invoked, no need to do much here */ +int +ip6_hbh_add_register_option (u8 option, + u8 size, + int rewrite_options (u8 * rewrite_string, + u8 * rewrite_size)) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + ASSERT (option < ARRAY_LEN (hm->add_options)); + + /* Already registered */ + if (hm->add_options[option]) + return (-1); + + hm->add_options[option] = rewrite_options; + hm->options_size[option] = size; + + return (0); +} + +int +ip6_hbh_add_unregister_option (u8 option) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + ASSERT (option < ARRAY_LEN (hm->add_options)); + + /* Not registered */ + if (!hm->add_options[option]) + return (-1); + + hm->add_options[option] = NULL; + hm->options_size[option] = 0; + return (0); +} + +/* Config handler registration */ +int +ip6_hbh_config_handler_register (u8 option, + int config_handler (void *data, u8 disable)) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + ASSERT (option < ARRAY_LEN (hm->config_handler)); + + /* Already registered */ + if (hm->config_handler[option]) + return (VNET_API_ERROR_INVALID_REGISTRATION); + + hm->config_handler[option] = config_handler; + + return (0); +} + +int +ip6_hbh_config_handler_unregister (u8 option) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + ASSERT (option < ARRAY_LEN (hm->config_handler)); + + /* Not registered */ + if (!hm->config_handler[option]) + return (VNET_API_ERROR_INVALID_REGISTRATION); + + hm->config_handler[option] = NULL; + return (0); +} + +/* Flow handler registration */ +int +ip6_hbh_flow_handler_register (u8 option, + u32 ioam_flow_handler (u32 flow_ctx, u8 add)) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + ASSERT (option < ARRAY_LEN (hm->flow_handler)); + + /* Already registered */ + if (hm->flow_handler[option]) + return (VNET_API_ERROR_INVALID_REGISTRATION); + + hm->flow_handler[option] = ioam_flow_handler; + + return (0); +} + +int +ip6_hbh_flow_handler_unregister (u8 option) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + ASSERT (option < ARRAY_LEN (hm->flow_handler)); + + /* Not registered */ + if (!hm->flow_handler[option]) + return (VNET_API_ERROR_INVALID_REGISTRATION); + + hm->flow_handler[option] = NULL; + return (0); +} + +typedef struct +{ + u32 next_index; +} ip6_add_hop_by_hop_trace_t; + +/* packet trace format function */ +static u8 * +format_ip6_add_hop_by_hop_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 *); + ip6_add_hop_by_hop_trace_t *t = va_arg (*args, + ip6_add_hop_by_hop_trace_t *); + + s = format (s, "IP6_ADD_HOP_BY_HOP: next index %d", t->next_index); + return s; +} + +vlib_node_registration_t ip6_add_hop_by_hop_node; + +#define foreach_ip6_add_hop_by_hop_error \ +_(PROCESSED, "Pkts w/ added ip6 hop-by-hop options") + +typedef enum +{ +#define _(sym,str) IP6_ADD_HOP_BY_HOP_ERROR_##sym, + foreach_ip6_add_hop_by_hop_error +#undef _ + IP6_ADD_HOP_BY_HOP_N_ERROR, +} ip6_add_hop_by_hop_error_t; + +static char *ip6_add_hop_by_hop_error_strings[] = { +#define _(sym,string) string, + foreach_ip6_add_hop_by_hop_error +#undef _ +}; + +static uword +ip6_add_hop_by_hop_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + u32 n_left_from, *from, *to_next; + ip_lookup_next_t next_index; + u32 processed = 0; + u8 *rewrite = hm->rewrite; + u32 rewrite_length = vec_len (rewrite); + + 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); + while (n_left_from >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t *b0, *b1; + u32 next0, next1; + ip6_header_t *ip0, *ip1; + ip6_hop_by_hop_header_t *hbh0, *hbh1; + u64 *copy_src0, *copy_dst0, *copy_src1, *copy_dst1; + u16 new_l0, new_l1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t *p2, *p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data - rewrite_length, + 2 * CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p3->data - rewrite_length, + 2 * CLIB_CACHE_LINE_BYTES, STORE); + } + + /* speculatively enqueue b0 and b1 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + /* $$$$$ Dual loop: process 2 x packets here $$$$$ */ + ip0 = vlib_buffer_get_current (b0); + ip1 = vlib_buffer_get_current (b1); + + /* Copy the ip header left by the required amount */ + copy_dst0 = (u64 *) (((u8 *) ip0) - rewrite_length); + copy_dst1 = (u64 *) (((u8 *) ip1) - rewrite_length); + copy_src0 = (u64 *) ip0; + copy_src1 = (u64 *) ip1; + + copy_dst0[0] = copy_src0[0]; + copy_dst0[1] = copy_src0[1]; + copy_dst0[2] = copy_src0[2]; + copy_dst0[3] = copy_src0[3]; + copy_dst0[4] = copy_src0[4]; + + copy_dst1[0] = copy_src1[0]; + copy_dst1[1] = copy_src1[1]; + copy_dst1[2] = copy_src1[2]; + copy_dst1[3] = copy_src1[3]; + copy_dst1[4] = copy_src1[4]; + + vlib_buffer_advance (b0, -(word) rewrite_length); + vlib_buffer_advance (b1, -(word) rewrite_length); + ip0 = vlib_buffer_get_current (b0); + ip1 = vlib_buffer_get_current (b1); + + hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); + hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1); + /* $$$ tune, rewrite_length is a multiple of 8 */ + clib_memcpy (hbh0, rewrite, rewrite_length); + clib_memcpy (hbh1, rewrite, rewrite_length); + /* Patch the protocol chain, insert the h-b-h (type 0) header */ + hbh0->protocol = ip0->protocol; + hbh1->protocol = ip1->protocol; + ip0->protocol = 0; + ip1->protocol = 0; + new_l0 = + clib_net_to_host_u16 (ip0->payload_length) + rewrite_length; + new_l1 = + clib_net_to_host_u16 (ip1->payload_length) + rewrite_length; + ip0->payload_length = clib_host_to_net_u16 (new_l0); + ip1->payload_length = clib_host_to_net_u16 (new_l1); + + /* Populate the (first) h-b-h list elt */ + next0 = IP6_HBYH_IOAM_INPUT_NEXT_IP6_LOOKUP; + next1 = IP6_HBYH_IOAM_INPUT_NEXT_IP6_LOOKUP; + + + /* $$$$$ End of processing 2 x packets $$$$$ */ + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + ip6_add_hop_by_hop_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->next_index = next0; + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + ip6_add_hop_by_hop_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->next_index = next1; + } + } + processed += 2; + /* verify speculative enqueues, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 next0; + ip6_header_t *ip0; + ip6_hop_by_hop_header_t *hbh0; + u64 *copy_src0, *copy_dst0; + u16 new_l0; + + /* speculatively enqueue b0 to the current next frame */ + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + + ip0 = vlib_buffer_get_current (b0); + + /* Copy the ip header left by the required amount */ + copy_dst0 = (u64 *) (((u8 *) ip0) - rewrite_length); + copy_src0 = (u64 *) ip0; + + copy_dst0[0] = copy_src0[0]; + copy_dst0[1] = copy_src0[1]; + copy_dst0[2] = copy_src0[2]; + copy_dst0[3] = copy_src0[3]; + copy_dst0[4] = copy_src0[4]; + vlib_buffer_advance (b0, -(word) rewrite_length); + ip0 = vlib_buffer_get_current (b0); + + hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); + /* $$$ tune, rewrite_length is a multiple of 8 */ + clib_memcpy (hbh0, rewrite, rewrite_length); + /* Patch the protocol chain, insert the h-b-h (type 0) header */ + hbh0->protocol = ip0->protocol; + ip0->protocol = 0; + new_l0 = + clib_net_to_host_u16 (ip0->payload_length) + rewrite_length; + ip0->payload_length = clib_host_to_net_u16 (new_l0); + + /* Populate the (first) h-b-h list elt */ + next0 = IP6_HBYH_IOAM_INPUT_NEXT_IP6_LOOKUP; + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + ip6_add_hop_by_hop_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->next_index = next0; + } + + processed++; + + /* verify speculative enqueue, maybe switch current next frame */ + 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); + } + + vlib_node_increment_counter (vm, ip6_add_hop_by_hop_node.index, + IP6_ADD_HOP_BY_HOP_ERROR_PROCESSED, processed); + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip6_add_hop_by_hop_node) = /* *INDENT-OFF* */ +{ + .function = ip6_add_hop_by_hop_node_fn,.name = + "ip6-add-hop-by-hop",.vector_size = sizeof (u32),.format_trace = + format_ip6_add_hop_by_hop_trace,.type = + VLIB_NODE_TYPE_INTERNAL,.n_errors = + ARRAY_LEN (ip6_add_hop_by_hop_error_strings),.error_strings = + ip6_add_hop_by_hop_error_strings, + /* See ip/lookup.h */ + .n_next_nodes = IP6_HBYH_IOAM_INPUT_N_NEXT,.next_nodes = + { +#define _(s,n) [IP6_HBYH_IOAM_INPUT_NEXT_##s] = n, + foreach_ip6_hbyh_ioam_input_next +#undef _ + } +,}; +/* *INDENT-ON* */ + +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (ip6_add_hop_by_hop_node, + ip6_add_hop_by_hop_node_fn); +/* The main h-b-h tracer was already invoked, no need to do much here */ +typedef struct +{ + u32 next_index; +} ip6_pop_hop_by_hop_trace_t; + +/* packet trace format function */ +static u8 * +format_ip6_pop_hop_by_hop_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 *); + ip6_pop_hop_by_hop_trace_t *t = + va_arg (*args, ip6_pop_hop_by_hop_trace_t *); + + s = format (s, "IP6_POP_HOP_BY_HOP: next index %d", t->next_index); + return s; +} + +int +ip6_hbh_pop_register_option (u8 option, + int options (vlib_buffer_t * b, + ip6_header_t * ip, + ip6_hop_by_hop_option_t * opt)) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + ASSERT (option < ARRAY_LEN (hm->pop_options)); + + /* Already registered */ + if (hm->pop_options[option]) + return (-1); + + hm->pop_options[option] = options; + + return (0); +} + +int +ip6_hbh_pop_unregister_option (u8 option) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + ASSERT (option < ARRAY_LEN (hm->pop_options)); + + /* Not registered */ + if (!hm->pop_options[option]) + return (-1); + + hm->pop_options[option] = NULL; + return (0); +} + +vlib_node_registration_t ip6_pop_hop_by_hop_node; + +#define foreach_ip6_pop_hop_by_hop_error \ +_(PROCESSED, "Pkts w/ removed ip6 hop-by-hop options") \ +_(NO_HOHO, "Pkts w/ no ip6 hop-by-hop options") \ +_(OPTION_FAILED, "ip6 pop hop-by-hop failed to process") + +typedef enum +{ +#define _(sym,str) IP6_POP_HOP_BY_HOP_ERROR_##sym, + foreach_ip6_pop_hop_by_hop_error +#undef _ + IP6_POP_HOP_BY_HOP_N_ERROR, +} ip6_pop_hop_by_hop_error_t; + +static char *ip6_pop_hop_by_hop_error_strings[] = { +#define _(sym,string) string, + foreach_ip6_pop_hop_by_hop_error +#undef _ +}; + +static inline void +ioam_pop_hop_by_hop_processing (vlib_main_t * vm, + ip6_header_t * ip0, + ip6_hop_by_hop_header_t * hbh0, + vlib_buffer_t * b) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + ip6_hop_by_hop_option_t *opt0, *limit0; + u8 type0; + + if (!hbh0 || !ip0) + return; + + opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1); + limit0 = (ip6_hop_by_hop_option_t *) + ((u8 *) hbh0 + ((hbh0->length + 1) << 3)); + + /* Scan the set of h-b-h options, process ones that we understand */ + while (opt0 < limit0) + { + type0 = opt0->type; + switch (type0) + { + case 0: /* Pad1 */ + opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1; + continue; + case 1: /* PadN */ + break; + default: + if (hm->pop_options[type0]) + { + if ((*hm->pop_options[type0]) (b, ip0, opt0) < 0) + { + vlib_node_increment_counter (vm, + ip6_pop_hop_by_hop_node.index, + IP6_POP_HOP_BY_HOP_ERROR_OPTION_FAILED, + 1); + } + } + } + opt0 = + (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length + + sizeof (ip6_hop_by_hop_option_t)); + } +} + +static uword +ip6_pop_hop_by_hop_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + ip6_main_t *im = &ip6_main; + ip_lookup_main_t *lm = &im->lookup_main; + u32 n_left_from, *from, *to_next; + ip_lookup_next_t next_index; + u32 processed = 0; + u32 no_header = 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); + + while (n_left_from >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t *b0, *b1; + u32 next0, next1; + u32 adj_index0, adj_index1; + ip6_header_t *ip0, *ip1; + ip_adjacency_t *adj0, *adj1; + ip6_hop_by_hop_header_t *hbh0, *hbh1; + u64 *copy_dst0, *copy_src0, *copy_dst1, *copy_src1; + u16 new_l0, new_l1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t *p2, *p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); + } + + /* speculatively enqueue b0 and b1 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + /* $$$$$ Dual loop: process 2 x packets here $$$$$ */ + ip0 = vlib_buffer_get_current (b0); + ip1 = vlib_buffer_get_current (b1); + adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX]; + adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX]; + adj0 = ip_get_adjacency (lm, adj_index0); + adj1 = ip_get_adjacency (lm, adj_index1); + + next0 = adj0->lookup_next_index; + next1 = adj1->lookup_next_index; + + hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); + hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1); + + ioam_pop_hop_by_hop_processing (vm, ip0, hbh0, b0); + ioam_pop_hop_by_hop_processing (vm, ip1, hbh1, b1); + + vlib_buffer_advance (b0, (hbh0->length + 1) << 3); + vlib_buffer_advance (b1, (hbh1->length + 1) << 3); + + new_l0 = clib_net_to_host_u16 (ip0->payload_length) - + ((hbh0->length + 1) << 3); + new_l1 = clib_net_to_host_u16 (ip1->payload_length) - + ((hbh1->length + 1) << 3); + + ip0->payload_length = clib_host_to_net_u16 (new_l0); + ip1->payload_length = clib_host_to_net_u16 (new_l1); + + ip0->protocol = hbh0->protocol; + ip1->protocol = hbh1->protocol; + + copy_src0 = (u64 *) ip0; + copy_src1 = (u64 *) ip1; + copy_dst0 = copy_src0 + (hbh0->length + 1); + copy_dst0[4] = copy_src0[4]; + copy_dst0[3] = copy_src0[3]; + copy_dst0[2] = copy_src0[2]; + copy_dst0[1] = copy_src0[1]; + copy_dst0[0] = copy_src0[0]; + copy_dst1 = copy_src1 + (hbh1->length + 1); + copy_dst1[4] = copy_src1[4]; + copy_dst1[3] = copy_src1[3]; + copy_dst1[2] = copy_src1[2]; + copy_dst1[1] = copy_src1[1]; + copy_dst1[0] = copy_src1[0]; + processed += 2; + /* $$$$$ End of processing 2 x packets $$$$$ */ + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) + { + if (b0->flags & VLIB_BUFFER_IS_TRACED) + { + ip6_pop_hop_by_hop_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->next_index = next0; + } + if (b1->flags & VLIB_BUFFER_IS_TRACED) + { + ip6_pop_hop_by_hop_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->next_index = next1; + } + } + + /* verify speculative enqueues, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 next0; + u32 adj_index0; + ip6_header_t *ip0; + ip_adjacency_t *adj0; + ip6_hop_by_hop_header_t *hbh0; + u64 *copy_dst0, *copy_src0; + u16 new_l0; + + /* speculatively enqueue b0 to the current next frame */ + 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); + adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX]; + adj0 = ip_get_adjacency (lm, adj_index0); + + /* Default use the next_index from the adjacency. */ + next0 = adj0->lookup_next_index; + + /* Perfectly normal to end up here w/ out h-b-h header */ + hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1); + + /* TODO:Temporarily doing it here.. do this validation in end_of_path_cb */ + ioam_pop_hop_by_hop_processing (vm, ip0, hbh0, b0); + /* Pop the trace data */ + vlib_buffer_advance (b0, (hbh0->length + 1) << 3); + new_l0 = clib_net_to_host_u16 (ip0->payload_length) - + ((hbh0->length + 1) << 3); + ip0->payload_length = clib_host_to_net_u16 (new_l0); + ip0->protocol = hbh0->protocol; + copy_src0 = (u64 *) ip0; + copy_dst0 = copy_src0 + (hbh0->length + 1); + copy_dst0[4] = copy_src0[4]; + copy_dst0[3] = copy_src0[3]; + copy_dst0[2] = copy_src0[2]; + copy_dst0[1] = copy_src0[1]; + copy_dst0[0] = copy_src0[0]; + processed++; + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + ip6_pop_hop_by_hop_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->next_index = next0; + } + + /* verify speculative enqueue, maybe switch current next frame */ + 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); + } + + vlib_node_increment_counter (vm, ip6_pop_hop_by_hop_node.index, + IP6_POP_HOP_BY_HOP_ERROR_PROCESSED, processed); + vlib_node_increment_counter (vm, ip6_pop_hop_by_hop_node.index, + IP6_POP_HOP_BY_HOP_ERROR_NO_HOHO, no_header); + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip6_pop_hop_by_hop_node) = +{ + .function = ip6_pop_hop_by_hop_node_fn,.name = + "ip6-pop-hop-by-hop",.vector_size = sizeof (u32),.format_trace = + format_ip6_pop_hop_by_hop_trace,.type = + VLIB_NODE_TYPE_INTERNAL,.sibling_of = "ip6-lookup",.n_errors = + ARRAY_LEN (ip6_pop_hop_by_hop_error_strings),.error_strings = + ip6_pop_hop_by_hop_error_strings, + /* See ip/lookup.h */ +.n_next_nodes = 0,}; + +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (ip6_pop_hop_by_hop_node, + ip6_pop_hop_by_hop_node_fn); +static clib_error_t * +ip6_hop_by_hop_ioam_init (vlib_main_t * vm) +{ + clib_error_t *error; + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + if ((error = vlib_call_init_function (vm, ip_main_init))) + return (error); + + if ((error = vlib_call_init_function (vm, ip6_lookup_init))) + return error; + + hm->vlib_main = vm; + hm->vnet_main = vnet_get_main (); + hm->unix_time_0 = (u32) time (0); /* Store starting time */ + hm->vlib_time_0 = vlib_time_now (vm); + hm->ioam_flag = IOAM_HBYH_MOD; + memset (hm->add_options, 0, sizeof (hm->add_options)); + memset (hm->pop_options, 0, sizeof (hm->pop_options)); + memset (hm->options_size, 0, sizeof (hm->options_size)); + + vnet_classify_register_unformat_opaque_index_fn (unformat_opaque_ioam); + + return (0); +} + +VLIB_INIT_FUNCTION (ip6_hop_by_hop_ioam_init); + +int +ip6_ioam_set_rewrite (u8 ** rwp, int has_trace_option, + int has_pot_option, int has_seqno_option) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + u8 *rewrite = NULL; + u32 size, rnd_size; + ip6_hop_by_hop_header_t *hbh; + u8 *current; + u8 *trace_data_size = NULL; + u8 *pot_data_size = NULL; + + vec_free (*rwp); + + if (has_trace_option == 0 && has_pot_option == 0) + return -1; + + /* Work out how much space we need */ + size = sizeof (ip6_hop_by_hop_header_t); + + //if (has_trace_option && hm->get_sizeof_options[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST] != 0) + if (has_trace_option + && hm->options_size[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST] != 0) + { + size += hm->options_size[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST]; + } + if (has_pot_option + && hm->add_options[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT] != 0) + { + size += hm->options_size[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT]; + } + + if (has_seqno_option) + { + size += hm->options_size[HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE]; + } + + /* Round to a multiple of 8 octets */ + rnd_size = (size + 7) & ~7; + + /* allocate it, zero-fill / pad by construction */ + vec_validate (rewrite, rnd_size - 1); + + hbh = (ip6_hop_by_hop_header_t *) rewrite; + /* Length of header in 8 octet units, not incl first 8 octets */ + hbh->length = (rnd_size >> 3) - 1; + current = (u8 *) (hbh + 1); + + if (has_trace_option + && hm->add_options[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST] != 0) + { + if (0 != (hm->options_size[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST])) + { + trace_data_size = + &hm->options_size[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST]; + if (0 == + hm->add_options[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST] (current, + trace_data_size)) + current += *trace_data_size; + } + } + if (has_pot_option + && hm->add_options[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT] != 0) + { + pot_data_size = + &hm->options_size[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT]; + if (0 == + hm->add_options[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT] (current, + pot_data_size)) + current += *pot_data_size; + } + + if (has_seqno_option && + (hm->add_options[HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE] != 0)) + { + if (0 == hm->add_options[HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE] (current, + & + (hm->options_size + [HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE]))) + current += hm->options_size[HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE]; + } + + *rwp = rewrite; + return 0; +} + +clib_error_t * +clear_ioam_rewrite_fn (void) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + vec_free (hm->rewrite); + hm->rewrite = 0; + hm->has_trace_option = 0; + hm->has_pot_option = 0; + hm->has_seqno_option = 0; + hm->has_analyse_option = 0; + if (hm->config_handler[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST]) + hm->config_handler[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST] (NULL, 1); + + if (hm->config_handler[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT]) + hm->config_handler[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT] (NULL, 1); + + if (hm->config_handler[HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE]) + { + hm->config_handler[HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE] ((void *) + &hm->has_analyse_option, + 1); + } + + return 0; +} + +clib_error_t * +clear_ioam_rewrite_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + return (clear_ioam_rewrite_fn ()); +} + +/*? + * This command clears all the In-band OAM (iOAM) features enabled by + * the '<em>set ioam rewrite</em>' command. Use '<em>show ioam summary</em>' to + * verify the configured settings cleared. + * + * @cliexpar + * Example of how to clear iOAM features: + * @cliexcmd{clear ioam rewrite} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (ip6_clear_ioam_rewrite_cmd, static) = { + .path = "clear ioam rewrite", + .short_help = "clear ioam rewrite", + .function = clear_ioam_rewrite_command_fn, +}; +/* *INDENT-ON* */ + +clib_error_t * +ip6_ioam_enable (int has_trace_option, int has_pot_option, + int has_seqno_option, int has_analyse_option) +{ + int rv; + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + rv = ip6_ioam_set_rewrite (&hm->rewrite, has_trace_option, + has_pot_option, has_seqno_option); + + switch (rv) + { + case 0: + if (has_trace_option) + { + hm->has_trace_option = has_trace_option; + if (hm->config_handler[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST]) + hm->config_handler[HBH_OPTION_TYPE_IOAM_TRACE_DATA_LIST] (NULL, + 0); + } + + if (has_pot_option) + { + hm->has_pot_option = has_pot_option; + if (hm->config_handler[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT]) + hm->config_handler[HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT] (NULL, + 0); + } + hm->has_analyse_option = has_analyse_option; + if (has_seqno_option) + { + hm->has_seqno_option = has_seqno_option; + if (hm->config_handler[HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE]) + { + hm->config_handler[HBH_OPTION_TYPE_IOAM_EDGE_TO_EDGE] ((void *) + &has_analyse_option, + 0); + } + } + break; + + default: + return clib_error_return_code (0, rv, 0, + "ip6_ioam_set_rewrite returned %d", rv); + } + + return 0; +} + + +static clib_error_t * +ip6_set_ioam_rewrite_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + int has_trace_option = 0; + int has_pot_option = 0; + int has_seqno_option = 0; + int has_analyse_option = 0; + clib_error_t *rv = 0; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "trace")) + has_trace_option = 1; + else if (unformat (input, "pot")) + has_pot_option = 1; + else if (unformat (input, "seqno")) + has_seqno_option = 1; + else if (unformat (input, "analyse")) + has_analyse_option = 1; + else + break; + } + + + rv = ip6_ioam_enable (has_trace_option, has_pot_option, + has_seqno_option, has_analyse_option); + + return rv; +} + +/*? + * This command is used to enable In-band OAM (iOAM) features on IPv6. + * '<em>trace</em>' is used to enable iOAM trace feature. '<em>pot</em>' is used to + * enable the Proof Of Transit feature. '<em>ppc</em>' is used to indicate the + * Per Packet Counter feature for Edge to Edge processing. '<em>ppc</em>' is + * used to indicate if this node is an '<em>encap</em>' node (iOAM edge node + * where packet enters iOAM domain), a '<em>decap</em>' node (iOAM edge node + * where packet leaves iOAM domain) or '<em>none</em>' (iOAM node where packet + * is in-transit through the iOAM domain). '<em>ppc</em>' can only be set if + * '<em>trace</em>' or '<em>pot</em>' is enabled. + * + * Use '<em>clear ioam rewrite</em>' to disable all features enabled by this + * command. Use '<em>show ioam summary</em>' to verify the configured settings. + * + * @cliexpar + * Example of how to enable trace and pot with ppc set to encap: + * @cliexcmd{set ioam rewrite trace pot ppc encap} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (ip6_set_ioam_rewrite_cmd, static) = { + .path = "set ioam rewrite", + .short_help = "set ioam [trace] [pot] [seqno] [analyse]", + .function = ip6_set_ioam_rewrite_command_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t * +ip6_show_ioam_summary_cmd_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + u8 *s = 0; + + + if (!is_zero_ip6_address (&hm->adj)) + { + s = format (s, " REWRITE FLOW CONFIGS - \n"); + s = format (s, " Destination Address : %U\n", + format_ip6_address, &hm->adj, sizeof (ip6_address_t)); + s = + format (s, " Flow operation : %d (%s)\n", + hm->ioam_flag, + (hm->ioam_flag == + IOAM_HBYH_ADD) ? "Add" : ((hm->ioam_flag == + IOAM_HBYH_MOD) ? "Mod" : "Pop")); + } + else + { + s = format (s, " REWRITE FLOW CONFIGS - Not configured\n"); + } + + + s = format (s, " TRACE OPTION - %d (%s)\n", + hm->has_trace_option, + (hm->has_trace_option ? "Enabled" : "Disabled")); + if (hm->has_trace_option) + s = + format (s, + "Try 'show ioam trace and show ioam-trace profile' for more information\n"); + + + s = format (s, " POT OPTION - %d (%s)\n", + hm->has_pot_option, + (hm->has_pot_option ? "Enabled" : "Disabled")); + if (hm->has_pot_option) + s = + format (s, + "Try 'show ioam pot and show pot profile' for more information\n"); + + s = format (s, " EDGE TO EDGE - SeqNo OPTION - %d (%s)\n", + hm->has_seqno_option, + hm->has_seqno_option ? "Enabled" : "Disabled"); + if (hm->has_seqno_option) + s = format (s, "Try 'show ioam e2e' for more information\n"); + + s = format (s, " iOAM Analyse OPTION - %d (%s)\n", + hm->has_analyse_option, + hm->has_analyse_option ? "Enabled" : "Disabled"); + + vlib_cli_output (vm, "%v", s); + vec_free (s); + return 0; +} + +/*? + * This command displays the current configuration data for In-band + * OAM (iOAM). + * + * @cliexpar + * Example to show the iOAM configuration: + * @cliexstart{show ioam summary} + * REWRITE FLOW CONFIGS - + * Destination Address : ff02::1 + * Flow operation : 2 (Pop) + * TRACE OPTION - 1 (Enabled) + * Try 'show ioam trace and show ioam-trace profile' for more information + * POT OPTION - 1 (Enabled) + * Try 'show ioam pot and show pot profile' for more information + * EDGE TO EDGE - PPC OPTION - 1 (Encap) + * @cliexend +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (ip6_show_ioam_run_cmd, static) = { + .path = "show ioam summary", + .short_help = "show ioam summary", + .function = ip6_show_ioam_summary_cmd_fn, +}; +/* *INDENT-ON* */ + +void +vnet_register_ioam_end_of_path_callback (void *cb) +{ + ip6_hop_by_hop_ioam_main_t *hm = &ip6_hop_by_hop_ioam_main; + + hm->ioam_end_of_path_cb = cb; +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |