/* * nsh.c - nsh mapping * * 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> #include <vnet/gre/gre.h> #include <vnet/vxlan/vxlan.h> #include <vnet/vxlan-gpe/vxlan_gpe.h> #include <vnet/l2/l2_classify.h> #include <vnet/adj/adj.h> #include <vpp/app/version.h> nsh_main_t nsh_main; /* Uses network order's class and type to register */ int nsh_md2_register_option (u16 class, u8 type, u8 option_size, int add_options (u8 * opt, u8 * opt_size), int options (vlib_buffer_t * b, nsh_tlv_header_t * opt), int swap_options (vlib_buffer_t * b, nsh_tlv_header_t * old_opt, nsh_tlv_header_t * new_opt), int pop_options (vlib_buffer_t * b, nsh_tlv_header_t * opt), u8 * trace (u8 * s, nsh_tlv_header_t * opt)) { nsh_main_t *nm = &nsh_main; nsh_option_map_by_key_t key, *key_copy; uword *p; nsh_option_map_t *nsh_option; key.class = class; key.type = type; key.pad = 0; p = hash_get_mem (nm->nsh_option_map_by_key, &key); /* Already registered */ if (p != 0) { return (-1); } pool_get_aligned (nm->nsh_option_mappings, nsh_option, CLIB_CACHE_LINE_BYTES); clib_memset (nsh_option, 0, sizeof (*nsh_option)); nsh_option->option_id = nsh_option - nm->nsh_option_mappings; key_copy = clib_mem_alloc (sizeof (*key_copy)); clib_memcpy (key_copy, &key, sizeof (*key_copy)); hash_set_mem (nm->nsh_option_map_by_key, key_copy, nsh_option - nm->nsh_option_mappings); if (option_size > (MAX_NSH_OPTION_LEN + sizeof (nsh_tlv_header_t))) { return (-1); } nm->options_size[nsh_option->option_id] = option_size; nm->add_options[nsh_option->option_id] = add_options; nm->options[nsh_option->option_id] = options; nm->swap_options[nsh_option->option_id] = swap_options; nm->pop_options[nsh_option->option_id] = pop_options; nm->trace[nsh_option->option_id] = trace; return (0); } /* Uses network order's class and type to lookup */ nsh_option_map_t * nsh_md2_lookup_option (u16 class, u8 type) { nsh_main_t *nm = &nsh_main; nsh_option_map_by_key_t key; uword *p; key.class = class; key.type = type; key.pad = 0; p = hash_get_mem (nm->nsh_option_map_by_key, &key); /* not registered */ if (p == 0) { return NULL; } return pool_elt_at_index (nm->nsh_option_mappings, p[0]); } /* Uses network order's class and type to unregister */ int nsh_md2_unregister_option (u16 class, u8 type, int options (vlib_buffer_t * b, nsh_tlv_header_t * opt), u8 * trace (u8 * s, nsh_tlv_header_t * opt)) { nsh_main_t *nm = &nsh_main; nsh_option_map_by_key_t key, *key_copy; uword *p; hash_pair_t *hp; nsh_option_map_t *nsh_option; key.class = class; key.type = type; key.pad = 0; p = hash_get_mem (nm->nsh_option_map_by_key, &key); /* not registered */ if (p == 0) { return (-1); } nsh_option = pool_elt_at_index (nm->nsh_option_mappings, p[0]); nm->options[nsh_option->option_id] = NULL; nm->add_options[nsh_option->option_id] = NULL; nm->pop_options[nsh_option->option_id] = NULL; nm->trace[nsh_option->option_id] = NULL; hp = hash_get_pair (nm->nsh_option_map_by_key, &key); key_copy = (void *) (hp->key); hash_unset_mem (nm->nsh_option_map_by_key, &key_copy); clib_mem_free (key_copy); pool_put (nm->nsh_option_mappings, nsh_option); return (0); } /** * @brief Formatting function for tracing VXLAN GPE with length * * @param *s * @param *args * * @return *s * */ static u8 * format_nsh_tunnel_with_length (u8 * s, va_list * args) { u32 dev_instance = va_arg (*args, u32); s = format (s, "unimplemented dev %u", dev_instance); return s; } /* *INDENT-OFF* */ VNET_HW_INTERFACE_CLASS (nsh_hw_class) = { .name = "NSH", .format_header = format_nsh_tunnel_with_length, .build_rewrite = default_build_rewrite, .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P, }; /* *INDENT-ON* */ void nsh_md2_set_next_ioam_export_override (uword next) { nsh_main_t *hm = &nsh_main; hm->decap_v4_next_override = next; return; } clib_error_t * nsh_init (vlib_main_t * vm) { vlib_node_t *node; nsh_main_t *nm = &nsh_main; clib_error_t *error = 0; uword next_node; /* Init the main structures from VPP */ nm->vlib_main = vm; nm->vnet_main = vnet_get_main (); /* Various state maintenance mappings */ nm->nsh_mapping_by_key = hash_create_mem (0, sizeof (u32), sizeof (uword)); nm->nsh_mapping_by_mapped_key = hash_create_mem (0, sizeof (u32), sizeof (uword)); nm->nsh_entry_by_key = hash_create_mem (0, sizeof (u32), sizeof (uword)); nm->nsh_proxy_session_by_key = hash_create_mem (0, sizeof (nsh_proxy_session_by_key_t), sizeof (uword)); nm->nsh_option_map_by_key = hash_create_mem (0, sizeof (nsh_option_map_by_key_t), sizeof (uword)); error = nsh_api_init (vm, nm); if (error) return error; node = vlib_get_node_by_name (vm, (u8 *) "nsh-input"); nm->nsh_input_node_index = node->index; node = vlib_get_node_by_name (vm, (u8 *) "nsh-proxy"); nm->nsh_proxy_node_index = node->index; node = vlib_get_node_by_name (vm, (u8 *) "nsh-classifier"); nm->nsh_classifier_node_index = node->index; /* Add dispositions to nodes that feed nsh-input */ //alagalah - validate we don't really need to use the node value next_node = vlib_node_add_next (vm, vxlan4_gpe_input_node.index, nm->nsh_input_node_index); vlib_node_add_next (vm, vxlan4_gpe_input_node.index, nm->nsh_proxy_node_index); vlib_node_add_next (vm, vxlan4_gpe_input_node.index, nsh_aware_vnf_proxy_node.index); vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_NSH, next_node); vlib_node_add_next (vm, vxlan6_gpe_input_node.index, nm->nsh_input_node_index); vlib_node_add_next (vm, vxlan6_gpe_input_node.index, nm->nsh_proxy_node_index); vlib_node_add_next (vm, vxlan6_gpe_input_node.index, nsh_aware_vnf_proxy_node.index); vlib_node_add_next (vm, gre4_input_node.index, nm->nsh_input_node_index); vlib_node_add_next (vm, gre4_input_node.index, nm->nsh_proxy_node_index); vlib_node_add_next (vm, gre4_input_node.index, nsh_aware_vnf_proxy_node.index); vlib_node_add_next (vm, gre6_input_node.index, nm->nsh_input_node_index); vlib_node_add_next (vm, gre6_input_node.index, nm->nsh_proxy_node_index); vlib_node_add_next (vm, gre6_input_node.index, nsh_aware_vnf_proxy_node.index); /* Add NSH-Proxy support */ vlib_node_add_next (vm, vxlan4_input_node.index, nm->nsh_proxy_node_index); vlib_node_add_next (vm, vxlan6_input_node.index, nm->nsh_proxy_node_index); /* Add NSH-Classifier support */ vlib_node_add_next (vm, ip4_classify_node.index, nm->nsh_classifier_node_index); vlib_node_add_next (vm, ip6_classify_node.index, nm->nsh_classifier_node_index); vlib_node_add_next (vm, l2_input_classify_node.index, nm->nsh_classifier_node_index); /* Add Ethernet+NSH support */ ethernet_register_input_type (vm, ETHERNET_TYPE_NSH, nm->nsh_input_node_index); return error; } VLIB_INIT_FUNCTION (nsh_init); /* *INDENT-OFF* */ VLIB_PLUGIN_REGISTER () = { .version = VPP_BUILD_VER, .description = "Network Service Header (NSH)", }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */