diff options
Diffstat (limited to 'src/plugins/srv6-as/node.c')
| -rw-r--r-- | src/plugins/srv6-as/node.c | 163 |
1 files changed, 155 insertions, 8 deletions
diff --git a/src/plugins/srv6-as/node.c b/src/plugins/srv6-as/node.c index 0e5a16e5e7b..d81a7e88722 100644 --- a/src/plugins/srv6-as/node.c +++ b/src/plugins/srv6-as/node.c @@ -92,6 +92,7 @@ typedef enum SRV6_AS_LOCALSID_NEXT_ERROR, SRV6_AS_LOCALSID_NEXT_REWRITE4, SRV6_AS_LOCALSID_NEXT_REWRITE6, + SRV6_AS_LOCALSID_NEXT_INTERFACE, SRV6_AS_LOCALSID_N_NEXT, } srv6_as_localsid_next_t; @@ -129,9 +130,10 @@ end_as_processing (vlib_buffer_t * b0, ext_hdr = ip6_ext_next_header (ext_hdr); } - /* Make sure next header is IP */ + /* Make sure next header is valid */ if (PREDICT_FALSE (hdr_type != IP_PROTOCOL_IPV6 && - hdr_type != IP_PROTOCOL_IP_IN_IP)) + hdr_type != IP_PROTOCOL_IP_IN_IP && + hdr_type != IP_PROTOCOL_IP6_NONXT)) { return; } @@ -139,13 +141,23 @@ end_as_processing (vlib_buffer_t * b0, /* Remove IP header and extensions */ vlib_buffer_advance (b0, encap_len); - /* Set Xconnect adjacency to VNF */ - vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0_mem->nh_adj; + if (hdr_type == IP_PROTOCOL_IP6_NONXT) + { + /* 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_AS_LOCALSID_NEXT_INTERFACE; + } + else + { + /* Set Xconnect adjacency to VNF */ + vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0_mem->nh_adj; - if (ls0_mem->ip_version == DA_IP4) - *next0 = SRV6_AS_LOCALSID_NEXT_REWRITE4; - else if (ls0_mem->ip_version == DA_IP6) - *next0 = SRV6_AS_LOCALSID_NEXT_REWRITE6; + /* Set next node to ip-rewrite */ + *next0 = (hdr_type == IP_PROTOCOL_IPV6) ? + SRV6_AS_LOCALSID_NEXT_REWRITE6 : SRV6_AS_LOCALSID_NEXT_REWRITE4; + } } /** @@ -236,6 +248,7 @@ VLIB_REGISTER_NODE (srv6_as_localsid_node) = { .next_nodes = { [SRV6_AS_LOCALSID_NEXT_REWRITE4] = "ip4-rewrite", [SRV6_AS_LOCALSID_NEXT_REWRITE6] = "ip6-rewrite", + [SRV6_AS_LOCALSID_NEXT_INTERFACE] = "interface-output", [SRV6_AS_LOCALSID_NEXT_ERROR] = "error-drop", }, }; @@ -248,6 +261,140 @@ VLIB_REGISTER_NODE (srv6_as_localsid_node) = { * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation */ static uword +srv6_as2_rewrite_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + ip6_sr_main_t *srm = &sr_main; + srv6_as_main_t *sm = &srv6_as_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_as_localsid_t *ls0_mem; + u32 next0 = SRV6_AS_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_AS_REWRITE_NEXT_ERROR; + b0->error = node->errors[SRV6_AS_REWRITE_COUNTER_NO_RW]; + } + else + { + ASSERT (VLIB_BUFFER_PRE_DATA_SIZE >= + (vec_len (ls0_mem->rewrite) + b0->current_data)); + + clib_memcpy (((u8 *) en0) - vec_len (ls0_mem->rewrite), + ls0_mem->rewrite, vec_len (ls0_mem->rewrite)); + vlib_buffer_advance (b0, -(word) vec_len (ls0_mem->rewrite)); + + ip0 = vlib_buffer_get_current (b0); + + ip0->payload_length = + clib_host_to_net_u16 (b0->current_length - + sizeof (ip6_header_t)); + } + + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && + PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + srv6_as_rewrite_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof *tr); + tr->error = 0; + + if (next0 == SRV6_AS_REWRITE_NEXT_ERROR) + { + tr->error = 1; + } + else + { + clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, + sizeof tr->src.as_u8); + clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, + sizeof tr->dst.as_u8); + } + } + + /* Increment per-SID AS rewrite counters */ + vlib_increment_combined_counter (((next0 == + SRV6_AS_LOCALSID_NEXT_ERROR) ? + &(sm->invalid_counters) : + &(sm->valid_counters)), + vm->thread_index, ls0_mem->index, + 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); + } + + /* Update counters */ + vlib_node_increment_counter (vm, srv6_as4_rewrite_node.index, + SRV6_AS_REWRITE_COUNTER_PROCESSED, + cnt_packets); + + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (srv6_as2_rewrite_node) = { + .function = srv6_as2_rewrite_fn, + .name = "srv6-as2-rewrite", + .vector_size = sizeof (u32), + .format_trace = format_srv6_as_rewrite_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = SRV6_AS_REWRITE_N_COUNTERS, + .error_strings = srv6_as_rewrite_counter_strings, + .n_next_nodes = SRV6_AS_REWRITE_N_NEXT, + .next_nodes = { + [SRV6_AS_REWRITE_NEXT_LOOKUP] = "ip6-lookup", + [SRV6_AS_REWRITE_NEXT_ERROR] = "error-drop", + }, +}; +/* *INDENT-ON* */ + + +/** + * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation + */ +static uword srv6_as4_rewrite_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { |