/* * nsh_node.c - nsh nodes * * 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 <vnet/vnet.h> #include <vnet/plugin/plugin.h> #include <nsh/nsh.h> always_inline void nsh_md2_encap (vlib_buffer_t * b, nsh_base_header_t * hdr, nsh_entry_t * nsh_entry) { nsh_main_t *nm = &nsh_main; nsh_base_header_t *nsh_base; nsh_tlv_header_t *opt0; nsh_tlv_header_t *limit0; nsh_tlv_header_t *nsh_md2; nsh_option_map_t *nsh_option; u8 old_option_size = 0; u8 new_option_size = 0; /* Populate the NSH Header */ opt0 = (nsh_tlv_header_t *) (nsh_entry->tlvs_data); limit0 = (nsh_tlv_header_t *) (nsh_entry->tlvs_data + nsh_entry->tlvs_len); nsh_md2 = (nsh_tlv_header_t *) ((u8 *) hdr /*nsh_entry->rewrite */ + sizeof (nsh_base_header_t)); nsh_entry->rewrite_size = sizeof (nsh_base_header_t); /* Scan the set of variable metadata, process ones that we understand */ while (opt0 < limit0) { old_option_size = sizeof (nsh_tlv_header_t) + opt0->length; /* round to 4-byte */ old_option_size = ((old_option_size + 3) >> 2) << 2; nsh_option = nsh_md2_lookup_option (opt0->class, opt0->type); if (nsh_option == NULL) { goto next_tlv_md2; } if (nm->options[nsh_option->option_id]) { if ((*nm->options[nsh_option->option_id]) (b, nsh_md2)) { goto next_tlv_md2; } /* option length may be varied */ new_option_size = sizeof (nsh_tlv_header_t) + nsh_md2->length; /* round to 4-byte */ new_option_size = ((new_option_size + 3) >> 2) << 2; nsh_entry->rewrite_size += new_option_size; nsh_md2 = (nsh_tlv_header_t *) (((u8 *) nsh_md2) + new_option_size); opt0 = (nsh_tlv_header_t *) (((u8 *) opt0) + old_option_size); } else { next_tlv_md2: opt0 = (nsh_tlv_header_t *) (((u8 *) opt0) + old_option_size); } } /* update nsh header's length */ nsh_base = (nsh_base_header_t *) nsh_entry->rewrite; nsh_base->length = (nsh_base->length & NSH_TTL_L2_MASK) | ((nsh_entry->rewrite_size >> 2) & NSH_LEN_MASK); return; } always_inline void nsh_md2_swap (vlib_buffer_t * b, nsh_base_header_t * hdr, u32 header_len, nsh_entry_t * nsh_entry, u32 * next, u32 drop_node_val) { nsh_main_t *nm = &nsh_main; nsh_base_header_t *nsh_base; nsh_tlv_header_t *opt0; nsh_tlv_header_t *limit0; nsh_tlv_header_t *nsh_md2; nsh_option_map_t *nsh_option; u8 old_option_size = 0; u8 new_option_size = 0; /* Populate the NSH Header */ opt0 = (nsh_md2_data_t *) (hdr + 1); limit0 = (nsh_md2_data_t *) ((u8 *) hdr + header_len); nsh_md2 = (nsh_tlv_header_t *) (nsh_entry->rewrite + sizeof (nsh_base_header_t)); nsh_entry->rewrite_size = sizeof (nsh_base_header_t); /* Scan the set of variable metadata, process ones that we understand */ while (opt0 < limit0) { old_option_size = sizeof (nsh_tlv_header_t) + opt0->length; /* round to 4-byte */ old_option_size = ((old_option_size + 3) >> 2) << 2; nsh_option = nsh_md2_lookup_option (opt0->class, opt0->type); if (nsh_option == NULL) { goto next_tlv_md2; } if (nm->swap_options[nsh_option->option_id]) { if ((*nm->swap_options[nsh_option->option_id]) (b, opt0, nsh_md2)) { goto next_tlv_md2; } /* option length may be varied */ new_option_size = sizeof (nsh_tlv_header_t) + nsh_md2->length; /* round to 4-byte */ new_option_size = ((new_option_size + 3) >> 2) << 2; nsh_entry->rewrite_size += new_option_size; nsh_md2 = (nsh_tlv_header_t *) (((u8 *) nsh_md2) + new_option_size); opt0 = (nsh_tlv_header_t *) (((u8 *) opt0) + old_option_size); } else { next_tlv_md2: opt0 = (nsh_tlv_header_t *) (((u8 *) opt0) + old_option_size); } } /* update nsh header's length */ nsh_base = (nsh_base_header_t *) nsh_entry->rewrite; nsh_base->length = (nsh_base->length & NSH_TTL_L2_MASK) | ((nsh_entry->rewrite_size >> 2) & NSH_LEN_MASK); return; } always_inline void nsh_md2_decap (vlib_buffer_t * b, nsh_base_header_t * hdr, u32 * header_len, u32 * next, u32 drop_node_val) { nsh_main_t *nm = &nsh_main; nsh_md2_data_t *opt0; nsh_md2_data_t *limit0; nsh_option_map_t *nsh_option; u8 option_len = 0; /* Populate the NSH Header */ opt0 = (nsh_md2_data_t *) (hdr + 1); limit0 = (nsh_md2_data_t *) ((u8 *) hdr + *header_len); /* Scan the set of variable metadata, process ones that we understand */ while (opt0 < limit0) { nsh_option = nsh_md2_lookup_option (opt0->class, opt0->type); if (nsh_option == NULL) { *next = drop_node_val; return; } if (nm->pop_options[nsh_option->option_id]) { if ((*nm->pop_options[nsh_option->option_id]) (b, opt0)) { *next = drop_node_val; return; } } /* round to 4-byte */ option_len = ((opt0->length + 3) >> 2) << 2; opt0 = (nsh_md2_data_t *) (((u8 *) opt0) + sizeof (nsh_md2_data_t) + option_len); *next = (nm->decap_v4_next_override) ? (nm->decap_v4_next_override) : (*next); *header_len = (nm->decap_v4_next_override) ? 0 : (*header_len); } return; } static uword nsh_input_map (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, u32 node_type) { u32 n_left_from, next_index, *from, *to_next; nsh_main_t *nm = &nsh_main; 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 >= 4 && n_left_to_next >= 2) { u32 bi0, bi1; vlib_buffer_t *b0, *b1; u32 next0 = NSH_NODE_NEXT_DROP, next1 = NSH_NODE_NEXT_DROP; uword *entry0, *entry1; nsh_base_header_t *hdr0 = 0, *hdr1 = 0; u32 header_len0 = 0, header_len1 = 0; u32 nsp_nsi0, nsp_nsi1; u32 ttl0, ttl1; u32 error0, error1; nsh_map_t *map0 = 0, *map1 = 0; nsh_entry_t *nsh_entry0 = 0, *nsh_entry1 = 0; nsh_base_header_t *encap_hdr0 = 0, *encap_hdr1 = 0; u32 encap_hdr_len0 = 0, encap_hdr_len1 = 0; nsh_proxy_session_by_key_t key0, key1; uword *p0, *p1; nsh_proxy_session_t *proxy0, *proxy1; u32 sw_if_index0 = 0, sw_if_index1 = 0; ethernet_header_t dummy_eth0, dummy_eth1; /* 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, 2 * CLIB_CACHE_LINE_BYTES, LOAD); CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD); } bi0 = from[0]; bi1 = from[1]; to_next[0] = bi0; to_next[1] = bi1; from += 2; to_next += 2; n_left_from -= 2; n_left_to_next -= 2; error0 = 0; error1 = 0; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); hdr0 = vlib_buffer_get_current (b0); hdr1 = vlib_buffer_get_current (b1); /* Process packet 0 */ if (node_type == NSH_INPUT_TYPE) { nsp_nsi0 = hdr0->nsp_nsi; header_len0 = (hdr0->length & NSH_LEN_MASK) * 4; ttl0 = (hdr0->ver_o_c & NSH_TTL_H4_MASK) << 2 | (hdr0->length & NSH_TTL_L2_MASK) >> 6; ttl0 = ttl0 - 1; if (PREDICT_FALSE (ttl0 == 0)) { error0 = NSH_NODE_ERROR_INVALID_TTL; goto trace0; } } else if (node_type == NSH_CLASSIFIER_TYPE) { nsp_nsi0 = clib_host_to_net_u32 (vnet_buffer (b0)-> l2_classify.opaque_index); } else if (node_type == NSH_AWARE_VNF_PROXY_TYPE) { /* Push dummy Eth header */ char dummy_dst_address[6] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 }; char dummy_src_address[6] = { 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc }; clib_memcpy_fast (dummy_eth0.dst_address, dummy_dst_address, 6); clib_memcpy_fast (dummy_eth0.src_address, dummy_src_address, 6); dummy_eth0.type = 0x0800; vlib_buffer_advance (b0, -(word) sizeof (ethernet_header_t)); hdr0 = vlib_buffer_get_current (b0); clib_memcpy_fast (hdr0, &dummy_eth0, (word) sizeof (ethernet_header_t)); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; nsp_nsi0 = nm->tunnel_index_by_sw_if_index[sw_if_index0]; } else { clib_memset (&key0, 0, sizeof (key0)); key0.transport_type = NSH_NODE_NEXT_ENCAP_VXLAN4; key0.transport_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; p0 = hash_get_mem (nm->nsh_proxy_session_by_key, &key0); if (PREDICT_FALSE (p0 == 0)) { error0 = NSH_NODE_ERROR_NO_PROXY; goto trace0; } proxy0 = pool_elt_at_index (nm->nsh_proxy_sessions, p0[0]); if (PREDICT_FALSE (proxy0 == 0)) { error0 = NSH_NODE_ERROR_NO_PROXY; goto trace0; } nsp_nsi0 = proxy0->nsp_nsi; } entry0 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi0); if (PREDICT_FALSE (entry0 == 0)) { error0 = NSH_NODE_ERROR_NO_MAPPING; goto trace0; } /* Entry should point to a mapping ... */ map0 = pool_elt_at_index (nm->nsh_mappings, entry0[0]); if (PREDICT_FALSE (map0 == 0)) { error0 = NSH_NODE_ERROR_NO_MAPPING; goto trace0; } /* set up things for next node to transmit ie which node to handle it and where */ next0 = map0->next_node; vnet_buffer (b0)->sw_if_index[VLIB_TX] = map0->sw_if_index; vnet_buffer (b0)->ip.adj_index[VLIB_TX] = map0->adj_index; if (PREDICT_FALSE (map0->nsh_action == NSH_ACTION_POP)) { /* Manipulate MD2 */ if (PREDICT_FALSE (hdr0->md_type == 2)) { nsh_md2_decap (b0, hdr0, &header_len0, &next0, NSH_NODE_NEXT_DROP); if (PREDICT_FALSE (next0 == NSH_NODE_NEXT_DROP)) { error0 = NSH_NODE_ERROR_INVALID_OPTIONS; goto trace0; } vnet_buffer (b0)->sw_if_index[VLIB_RX] = map0->rx_sw_if_index; } /* Pop NSH header */ vlib_buffer_advance (b0, (word) header_len0); goto trace0; } entry0 = hash_get_mem (nm->nsh_entry_by_key, &map0->mapped_nsp_nsi); if (PREDICT_FALSE (entry0 == 0)) { error0 = NSH_NODE_ERROR_NO_ENTRY; goto trace0; } nsh_entry0 = (nsh_entry_t *) pool_elt_at_index (nm->nsh_entries, entry0[0]); encap_hdr0 = (nsh_base_header_t *) (nsh_entry0->rewrite); /* rewrite_size should equal to (encap_hdr0->length * 4) */ encap_hdr_len0 = nsh_entry0->rewrite_size; if (PREDICT_TRUE (map0->nsh_action == NSH_ACTION_SWAP)) { /* Manipulate MD2 */ if (PREDICT_FALSE (hdr0->md_type == 2)) { nsh_md2_swap (b0, hdr0, header_len0, nsh_entry0, &next0, NSH_NODE_NEXT_DROP); if (PREDICT_FALSE (next0 == NSH_NODE_NEXT_DROP)) { error0 = NSH_NODE_ERROR_INVALID_OPTIONS; goto trace0; } } /* Pop old NSH header */ vlib_buffer_advance (b0, (word) header_len0); /* After processing, md2's length may be varied */ encap_hdr_len0 = nsh_entry0->rewrite_size; /* Push new NSH header */ vlib_buffer_advance (b0, -(word) encap_hdr_len0); hdr0 = vlib_buffer_get_current (b0); clib_memcpy_fast (hdr0, encap_hdr0, (word) encap_hdr_len0); goto trace0; } if (PREDICT_TRUE (map0->nsh_action == NSH_ACTION_PUSH)) { /* After processing, md2's length may be varied */ encap_hdr_len0 = nsh_entry0->rewrite_size; /* Push new NSH header */ vlib_buffer_advance (b0, -(word) encap_hdr_len0); hdr0 = vlib_buffer_get_current (b0); clib_memcpy_fast (hdr0, encap_hdr0, (word) encap_hdr_len0); /* Manipulate MD2 */ if (PREDICT_FALSE (nsh_entry0->nsh_base.md_type == 2)) { nsh_md2_encap (b0, hdr0, nsh_entry0); } } trace0: b0->error = error0 ? node->errors[error0] : 0; if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { nsh_input_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy_fast (&(tr->trace_data), hdr0, ((hdr0->length & NSH_LEN_MASK) * 4)); } /* Process packet 1 */ if (node_type == NSH_INPUT_TYPE) { nsp_nsi1 = hdr1->nsp_nsi; header_len1 = (hdr1->length & NSH_LEN_MASK) * 4; ttl1 = (hdr1->ver_o_c & NSH_TTL_H4_MASK) << 2 | (hdr1->length & NSH_TTL_L2_MASK) >> 6; ttl1 = ttl1 - 1; if (PREDICT_FALSE (ttl1 == 0)) { error1 = NSH_NODE_ERROR_INVALID_TTL; goto trace1; } } else if (node_type == NSH_CLASSIFIER_TYPE) { nsp_nsi1 = clib_host_to_net_u32 (vnet_buffer (b1)-> l2_classify.opaque_index); } else if (node_type == NSH_AWARE_VNF_PROXY_TYPE) { /* Push dummy Eth header */ char dummy_dst_address[6] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 }; char dummy_src_address[6] = { 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc }; clib_memcpy_fast (dummy_eth1.dst_address, dummy_dst_address, 6); clib_memcpy_fast (dummy_eth1.src_address, dummy_src_address, 6); dummy_eth1.type = 0x0800; vlib_buffer_advance (b1, -(word) sizeof (ethernet_header_t)); hdr1 = vlib_buffer_get_current (b1); clib_memcpy_fast (hdr1, &dummy_eth1, (word) sizeof (ethernet_header_t)); sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX]; nsp_nsi1 = nm->tunnel_index_by_sw_if_index[sw_if_index1]; } else { clib_memset (&key1, 0, sizeof (key1)); key1.transport_type = NSH_NODE_NEXT_ENCAP_VXLAN4; key1.transport_index = vnet_buffer (b1)->sw_if_index[VLIB_RX]; p1 = hash_get_mem (nm->nsh_proxy_session_by_key, &key1); if (PREDICT_FALSE (p1 == 0)) { error1 = NSH_NODE_ERROR_NO_PROXY; goto trace1; } proxy1 = pool_elt_at_index (nm->nsh_proxy_sessions, p1[0]); if (PREDICT_FALSE (proxy1 == 0)) { error1 = NSH_NODE_ERROR_NO_PROXY; goto trace1; } nsp_nsi1 = proxy1->nsp_nsi; } entry1 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi1); if (PREDICT_FALSE (entry1 == 0)) { error1 = NSH_NODE_ERROR_NO_MAPPING; goto trace1; } /* Entry should point to a mapping ... */ map1 = pool_elt_at_index (nm->nsh_mappings, entry1[0]); if (PREDICT_FALSE (map1 == 0)) { error1 = NSH_NODE_ERROR_NO_MAPPING; goto trace1; } /* set up things for next node to transmit ie which node to handle it and where */ next1 = map1->next_node; vnet_buffer (b1)->sw_if_index[VLIB_TX] = map1->sw_if_index; vnet_buffer (b1)->ip.adj_index[VLIB_TX] = map1->adj_index; if (PREDICT_FALSE (map1->nsh_action == NSH_ACTION_POP)) { /* Manipulate MD2 */ if (PREDICT_FALSE (hdr1->md_type == 2)) { nsh_md2_decap (b1, hdr1, &header_len1, &next1, NSH_NODE_NEXT_DROP); if (PREDICT_FALSE (next1 == NSH_NODE_NEXT_DROP)) { error1 = NSH_NODE_ERROR_INVALID_OPTIONS; goto trace1; } vnet_buffer (b1)->sw_if_index[VLIB_RX] = map1->rx_sw_if_index; } /* Pop NSH header */ vlib_buffer_advance (b1, (word) header_len1); goto trace1; } entry1 = hash_get_mem (nm->nsh_entry_by_key, &map1->mapped_nsp_nsi); if (PREDICT_FALSE (entry1 == 0)) { error1 = NSH_NODE_ERROR_NO_ENTRY; goto trace1; } nsh_entry1 = (nsh_entry_t *) pool_elt_at_index (nm->nsh_entries, entry1[0]); encap_hdr1 = (nsh_base_header_t *) (nsh_entry1->rewrite); /* rewrite_size should equal to (encap_hdr0->length * 4) */ encap_hdr_len1 = nsh_entry1->rewrite_size; if (PREDICT_TRUE (map1->nsh_action == NSH_ACTION_SWAP)) { /* Manipulate MD2 */ if (PREDICT_FALSE (hdr1->md_type == 2)) { nsh_md2_swap (b1, hdr1, header_len1, nsh_entry1, &next1, NSH_NODE_NEXT_DROP); if (PREDICT_FALSE (next1 == NSH_NODE_NEXT_DROP)) { error1 = NSH_NODE_ERROR_INVALID_OPTIONS; goto trace1; } } /* Pop old NSH header */ vlib_buffer_advance (b1, (word) header_len1); /* After processing, md2's length may be varied */ encap_hdr_len1 = nsh_entry1->rewrite_size; /* Push new NSH header */ vlib_buffer_advance (b1, -(word) encap_hdr_len1); hdr1 = vlib_buffer_get_current (b1); clib_memcpy_fast (hdr1, encap_hdr1, (word) encap_hdr_len1); goto trace1; } if (PREDICT_FALSE (map1->nsh_action == NSH_ACTION_PUSH)) { /* After processing, md2's length may be varied */ encap_hdr_len1 = nsh_entry1->rewrite_size; /* Push new NSH header */ vlib_buffer_advance (b1, -(word) encap_hdr_len1); hdr1 = vlib_buffer_get_current (b1); clib_memcpy_fast (hdr1, encap_hdr1, (word) encap_hdr_len1); /* Manipulate MD2 */ if (PREDICT_FALSE (nsh_entry1->nsh_base.md_type == 2)) { nsh_md2_encap (b1, hdr1, nsh_entry1); } } trace1: b1->error = error1 ? node->errors[error1] : 0; if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { nsh_input_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); clib_memcpy_fast (&(tr->trace_data), hdr1, ((hdr1->length & NSH_LEN_MASK) * 4)); } 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 = 0; vlib_buffer_t *b0 = NULL; u32 next0 = NSH_NODE_NEXT_DROP; uword *entry0; nsh_base_header_t *hdr0 = 0; u32 header_len0 = 0; u32 nsp_nsi0; u32 ttl0; u32 error0; nsh_map_t *map0 = 0; nsh_entry_t *nsh_entry0 = 0; nsh_base_header_t *encap_hdr0 = 0; u32 encap_hdr_len0 = 0; nsh_proxy_session_by_key_t key0; uword *p0; nsh_proxy_session_t *proxy0 = 0; u32 sw_if_index0 = 0; ethernet_header_t dummy_eth0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; error0 = 0; b0 = vlib_get_buffer (vm, bi0); hdr0 = vlib_buffer_get_current (b0); if (node_type == NSH_INPUT_TYPE) { nsp_nsi0 = hdr0->nsp_nsi; header_len0 = (hdr0->length & NSH_LEN_MASK) * 4; ttl0 = (hdr0->ver_o_c & NSH_TTL_H4_MASK) << 2 | (hdr0->length & NSH_TTL_L2_MASK) >> 6; ttl0 = ttl0 - 1; if (PREDICT_FALSE (ttl0 == 0)) { error0 = NSH_NODE_ERROR_INVALID_TTL; goto trace00; } } else if (node_type == NSH_CLASSIFIER_TYPE) { nsp_nsi0 = clib_host_to_net_u32 (vnet_buffer (b0)-> l2_classify.opaque_index); } else if (node_type == NSH_AWARE_VNF_PROXY_TYPE) { /* Push dummy Eth header */ char dummy_dst_address[6] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 }; char dummy_src_address[6] = { 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc }; clib_memcpy_fast (dummy_eth0.dst_address, dummy_dst_address, 6); clib_memcpy_fast (dummy_eth0.src_address, dummy_src_address, 6); dummy_eth0.type = 0x0800; vlib_buffer_advance (b0, -(word) sizeof (ethernet_header_t)); hdr0 = vlib_buffer_get_current (b0); clib_memcpy_fast (hdr0, &dummy_eth0, (word) sizeof (ethernet_header_t)); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; nsp_nsi0 = nm->tunnel_index_by_sw_if_index[sw_if_index0]; } else { clib_memset (&key0, 0, sizeof (key0)); key0.transport_type = NSH_NODE_NEXT_ENCAP_VXLAN4; key0.transport_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; p0 = hash_get_mem (nm->nsh_proxy_session_by_key, &key0); if (PREDICT_FALSE (p0 == 0)) { error0 = NSH_NODE_ERROR_NO_PROXY; goto trace00; } proxy0 = pool_elt_at_index (nm->nsh_proxy_sessions, p0[0]); if (PREDICT_FALSE (proxy0 == 0)) { error0 = NSH_NODE_ERROR_NO_PROXY; goto trace00; } nsp_nsi0 = proxy0->nsp_nsi; } entry0 = hash_get_mem (nm->nsh_mapping_by_key, &nsp_nsi0); if (PREDICT_FALSE (entry0 == 0)) { error0 = NSH_NODE_ERROR_NO_MAPPING; goto trace00; } /* Entry should point to a mapping ... */ map0 = pool_elt_at_index (nm->nsh_mappings, entry0[0]); if (PREDICT_FALSE (map0 == 0)) { error0 = NSH_NODE_ERROR_NO_MAPPING; goto trace00; } /* set up things for next node to transmit ie which node to handle it and where */ next0 = map0->next_node; vnet_buffer (b0)->sw_if_index[VLIB_TX] = map0->sw_if_index; vnet_buffer (b0)->ip.adj_index[VLIB_TX] = map0->adj_index; vnet_buffer (b0)->sw_if_index[VLIB_RX] = map0->nsh_sw_if; if (PREDICT_FALSE (map0->nsh_action == NSH_ACTION_POP)) { /* Manipulate MD2 */ if (PREDICT_FALSE (hdr0->md_type == 2)) { nsh_md2_decap (b0, hdr0, &header_len0, &next0, NSH_NODE_NEXT_DROP); if (PREDICT_FALSE (next0 == NSH_NODE_NEXT_DROP)) { error0 = NSH_NODE_ERROR_INVALID_OPTIONS; goto trace00; } vnet_buffer (b0)->sw_if_index[VLIB_RX] = map0->rx_sw_if_index; } /* Pop NSH header */ vlib_buffer_advance (b0, (word) header_len0); goto trace00; } entry0 = hash_get_mem (nm->nsh_entry_by_key, &map0->mapped_nsp_nsi); if (PREDICT_FALSE (entry0 == 0)) { error0 = NSH_NODE_ERROR_NO_ENTRY; goto trace00; } nsh_entry0 = (nsh_entry_t *) pool_elt_at_index (nm->nsh_entries, entry0[0]); encap_hdr0 = (nsh_base_header_t *) (nsh_entry0->rewrite); /* rewrite_size should equal to (encap_hdr0->length * 4) */ encap_hdr_len0 = nsh_entry0->rewrite_size; if (PREDICT_TRUE (map0->nsh_action == NSH_ACTION_SWAP)) { /* Manipulate MD2 */ if (PREDICT_FALSE (hdr0->md_type == 2)) { nsh_md2_swap (b0, hdr0, header_len0, nsh_entry0, &next0, NSH_NODE_NEXT_DROP); if (PREDICT_FALSE (next0 == NSH_NODE_NEXT_DROP)) { error0 = NSH_NODE_ERROR_INVALID_OPTIONS; goto trace00; } } /* Pop old NSH header */ vlib_buffer_advance (b0, (word) header_len0); /* After processing, md2's length may be varied */ encap_hdr_len0 = nsh_entry0->rewrite_size; /* Push new NSH header */ vlib_buffer_advance (b0, -(word) encap_hdr_len0); hdr0 = vlib_buffer_get_current (b0); clib_memcpy_fast (hdr0, encap_hdr0, (word) encap_hdr_len0); goto trace00; } if (PREDICT_TRUE (map0->nsh_action == NSH_ACTION_PUSH)) { /* After processing, md2's length may be varied */ encap_hdr_len0 = nsh_entry0->rewrite_size; /* Push new NSH header */ vlib_buffer_advance (b0, -(word) encap_hdr_len0); hdr0 = vlib_buffer_get_current (b0); clib_memcpy_fast (hdr0, encap_hdr0, (word) encap_hdr_len0); /* Manipulate MD2 */ if (PREDICT_FALSE (nsh_entry0->nsh_base.md_type == 2)) { nsh_md2_encap (b0, hdr0, nsh_entry0); } } trace00:b0->error = error0 ? node->errors[error0] : 0; if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { nsh_input_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy_fast (&(tr->trace_data[0]), hdr0, ((hdr0->length & NSH_LEN_MASK) * 4)); } 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; } /** * @brief Graph processing dispatch function for NSH Input * * @node nsh_input * @param *vm * @param *node * @param *from_frame * * @return from_frame->n_vectors * */ VLIB_NODE_FN (nsh_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return nsh_input_map (vm, node, from_frame, NSH_INPUT_TYPE); } /** * @brief Graph processing dispatch function for NSH-Proxy * * @node nsh_proxy * @param *vm * @param *node * @param *from_frame * * @return from_frame->n_vectors * */ VLIB_NODE_FN (nsh_proxy_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return nsh_input_map (vm, node, from_frame, NSH_PROXY_TYPE); } /** * @brief Graph processing dispatch function for NSH Classifier * * @node nsh_classifier * @param *vm * @param *node * @param *from_frame * * @return from_frame->n_vectors * */ VLIB_NODE_FN (nsh_classifier_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return nsh_input_map (vm, node, from_frame, NSH_CLASSIFIER_TYPE); } /** * @brief Graph processing dispatch function for NSH-AWARE-VNF-PROXY * * @node nsh_aware_vnf_proxy * @param *vm * @param *node * @param *from_frame * * @return from_frame->n_vectors * */ VLIB_NODE_FN (nsh_aware_vnf_proxy_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return nsh_input_map (vm, node, from_frame, NSH_AWARE_VNF_PROXY_TYPE); } static char *nsh_node_error_strings[] = { #define _(sym,string) string, foreach_nsh_node_error #undef _ }; /* *INDENT-OFF* */ /* register nsh-input node */ VLIB_REGISTER_NODE (nsh_input_node) = { .name = "nsh-input", .vector_size = sizeof (u32), .format_trace = format_nsh_node_map_trace, .format_buffer = format_nsh_header, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nsh_node_error_strings), .error_strings = nsh_node_error_strings, .n_next_nodes = NSH_NODE_N_NEXT, .next_nodes = { #define _(s,n) [NSH_NODE_NEXT_##s] = n, foreach_nsh_node_next #undef _ }, }; /* register nsh-proxy node */ VLIB_REGISTER_NODE (nsh_proxy_node) = { .name = "nsh-proxy", .vector_size = sizeof (u32), .format_trace = format_nsh_node_map_trace, .format_buffer = format_nsh_header, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nsh_node_error_strings), .error_strings = nsh_node_error_strings, .n_next_nodes = NSH_NODE_N_NEXT, .next_nodes = { #define _(s,n) [NSH_NODE_NEXT_##s] = n, foreach_nsh_node_next #undef _ }, }; /* register nsh-classifier node */ VLIB_REGISTER_NODE (nsh_classifier_node) = { .name = "nsh-classifier", .vector_size = sizeof (u32), .format_trace = format_nsh_node_map_trace, .format_buffer = format_nsh_header, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nsh_node_error_strings), .error_strings = nsh_node_error_strings, .n_next_nodes = NSH_NODE_N_NEXT, .next_nodes = { #define _(s,n) [NSH_NODE_NEXT_##s] = n, foreach_nsh_node_next #undef _ }, }; /* register nsh-aware-vnf-proxy node */ VLIB_REGISTER_NODE (nsh_aware_vnf_proxy_node) = { .name = "nsh-aware-vnf-proxy", .vector_size = sizeof (u32), .format_trace = format_nsh_node_map_trace, .format_buffer = format_nsh_header, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN (nsh_node_error_strings), .error_strings = nsh_node_error_strings, .n_next_nodes = NSH_NODE_N_NEXT, .next_nodes = { #define _(s,n) [NSH_NODE_NEXT_##s] = n, foreach_nsh_node_next #undef _ }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */