vpp - Vector Packet Processing

Age	Commit message (Expand)	Author	Files	Lines
2016-07-01	Simple ip4 NAT plugin	Dave Barach	1	-0/+953

/* * l2_output_acl.c : layer 2 output acl processing * * Copyright (c) 2013 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 <vnet/ethernet/ethernet.h> #include <vnet/ethernet/packet.h> #include <vnet/ip/ip_packet.h> #include <vnet/ip/ip4_packet.h> #include <vnet/ip/ip6_packet.h> #include <vlib/cli.h> #include <vnet/l2/feat_bitmap.h> #include <vnet/l2/l2_output.h> #include <vppinfra/error.h> #include <vppinfra/hash.h> #include <vppinfra/cache.h> typedef struct { /* Next nodes for features and output interfaces */ l2_output_next_nodes_st next_nodes; /* convenience variables */ vlib_main_t *vlib_main; vnet_main_t *vnet_main; } l2_outacl_main_t; typedef struct { /* per-pkt trace data */ u8 src[6]; u8 dst[6]; u32 next_index; u32 sw_if_index; } l2_outacl_trace_t; /* packet trace format function */ static u8 * format_l2_outacl_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 *); l2_outacl_trace_t *t = va_arg (*args, l2_outacl_trace_t *); s = format (s, "l2-output-acl: sw_if_index %d dst %U src %U", t->sw_if_index, format_ethernet_address, t->dst, format_ethernet_address, t->src); return s; } l2_outacl_main_t l2_outacl_main; static vlib_node_registration_t l2_outacl_node; #define foreach_l2_outacl_error \ _(L2_OUTACL, "L2 output ACL packets") \ _(DROP, "L2 output drops") typedef enum { #define _(sym,str) L2_OUTACL_ERROR_##sym, foreach_l2_outacl_error #undef _ L2_OUTACL_N_ERROR, } l2_outacl_error_t; static char *l2_outacl_error_strings[] = { #define _(sym,string) string, foreach_l2_outacl_error #undef _ }; typedef enum { L2_OUTACL_NEXT_DROP, L2_OUTACL_N_NEXT, } l2_outacl_next_t; static uword l2_outacl_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, *from, *to_next; l2_outacl_next_t next_index; l2_outacl_main_t *msm = &l2_outacl_main; vlib_node_t *n = vlib_get_node (vm, l2_outacl_node.index); u32 node_counter_base_index = n->error_heap_index; vlib_error_main_t *em = &vm->error_main; u32 cached_sw_if_index = (u32) ~ 0; u32 cached_next_index = (u32) ~ 0; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; /* number of packets to process */ next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; /* get space to enqueue frame to graph node "next_index" */ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (0 && n_left_from >= 4 && n_left_to_next >= 2) { u32 bi0, bi1; vlib_buffer_t *b0, *b1; u32 next0, next1; u32 sw_if_index0, sw_if_index1; ethernet_header_t *h0, *h1; /* 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 */ /* bi is "buffer index", b is pointer to the buffer */ 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); /* TX interface handles */ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX]; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (b0->flags & VLIB_BUFFER_IS_TRACED) { l2_outacl_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; t->next_index = next0; clib_memcpy (t->src, h0->src_address, 6); clib_memcpy (t->dst, h0->dst_address, 6); } if (b1->flags & VLIB_BUFFER_IS_TRACED) { l2_outacl_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); t->sw_if_index = sw_if_index1; t->next_index = next1; clib_memcpy (t->src, h1->src_address, 6); clib_memcpy (t->dst, h1->dst_address, 6); } } em->counters[node_counter_base_index + L2_OUTACL_ERROR_L2_OUTACL] += 2; /* add core loop code here */ /* verify speculative enqueues, maybe switch current next frame */ /* if next0==next1==next_index then nothing special needs to be done */ 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 sw_if_index0; ethernet_header_t *h0; u32 feature_bitmap0; /* 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); h0 = vlib_buffer_get_current (b0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { l2_outacl_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; clib_memcpy (t->src, h0->src_address, 6); clib_memcpy (t->dst, h0->dst_address, 6); } em->counters[node_counter_base_index + L2_OUTACL_ERROR_L2_OUTACL] += 1; /* * L2_OUTACL code * Dummy for now, just go to next feature node */ /* Remove ourself from the feature bitmap */ feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap & ~L2OUTPUT_FEAT_ACL; /* Determine next node */ l2_output_dispatch (msm->vlib_main, msm->vnet_main, node, l2_outacl_node.index, &cached_sw_if_index, &cached_next_index, &msm->next_nodes, b0, sw_if_index0, feature_bitmap0, &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); } return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (l2_outacl_node,static) = { .function = l2_outacl_node_fn, .name = "l2-output-acl", .vector_size = sizeof (u32), .format_trace = format_l2_outacl_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(l2_outacl_error_strings), .error_strings = l2_outacl_error_strings, .n_next_nodes = L2_OUTACL_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [L2_OUTACL_NEXT_DROP] = "error-drop", }, }; /* *INDENT-ON* */ VLIB_NODE_FUNCTION_MULTIARCH (l2_outacl_node, l2_outacl_node_fn) clib_error_t *l2_outacl_init (vlib_main_t * vm) { l2_outacl_main_t *mp = &l2_outacl_main; mp->vlib_main = vm; mp->vnet_main = vnet_get_main (); /* Initialize the feature next-node indexes */ feat_bitmap_init_next_nodes (vm, l2_outacl_node.index, L2OUTPUT_N_FEAT, l2output_get_feat_names (), mp->next_nodes.feat_next_node_index); return 0; } VLIB_INIT_FUNCTION (l2_outacl_init); #if 0 /** @todo maybe someone will add output ACL's in the future. * Set subinterface outacl enable/disable. * The CLI format is: * set interface acl output <interface> [disable] */ static clib_error_t * int_l2_outacl (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t *vnm = vnet_get_main (); clib_error_t *error = 0; u32 sw_if_index; u32 enable; if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) { error = clib_error_return (0, "unknown interface `%U'", format_unformat_error, input); goto done; } enable = 1; if (unformat (input, "disable")) { enable = 0; } /* set the interface flag */ l2output_intf_bitmap_enable (sw_if_index, L2OUTPUT_FEAT_ACL, enable); done: return error; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (int_l2_outacl_cli, static) = { .path = "set interface acl output", .short_help = "set interface acl output <interface> [disable]", .function = int_l2_outacl, }; /* *INDENT-ON* */ #endif /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */