/* *------------------------------------------------------------------ * flow_api.c - flow api * * 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 <vnet/vnet.h> #include <vlibmemory/api.h> #include <vnet/interface.h> #include <vnet/api_errno.h> #include <vnet/fib/fib_table.h> #include <vnet/ipfix-export/flow_report.h> #include <vnet/ipfix-export/flow_report_classify.h> #include <vnet/vnet_msg_enum.h> #define vl_typedefs /* define message structures */ #include <vnet/vnet_all_api_h.h> #undef vl_typedefs #define vl_endianfun /* define message structures */ #include <vnet/vnet_all_api_h.h> #undef vl_endianfun /* instantiate all the print functions we know about */ #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) #define vl_printfun #include <vnet/vnet_all_api_h.h> #undef vl_printfun #include <vlibapi/api_helper_macros.h> #define foreach_vpe_api_msg \ _(SET_IPFIX_EXPORTER, set_ipfix_exporter) \ _(IPFIX_EXPORTER_DUMP, ipfix_exporter_dump) \ _(SET_IPFIX_CLASSIFY_STREAM, set_ipfix_classify_stream) \ _(IPFIX_CLASSIFY_STREAM_DUMP, ipfix_classify_stream_dump) \ _(IPFIX_CLASSIFY_TABLE_ADD_DEL, ipfix_classify_table_add_del) \ _(IPFIX_CLASSIFY_TABLE_DUMP, ipfix_classify_table_dump) \ _(IPFIX_FLUSH, ipfix_flush) static void vl_api_set_ipfix_exporter_t_handler (vl_api_set_ipfix_exporter_t * mp) { vlib_main_t *vm = vlib_get_main (); flow_report_main_t *frm = &flow_report_main; vl_api_registration_t *reg; vl_api_set_ipfix_exporter_reply_t *rmp; ip4_address_t collector, src; u16 collector_port = UDP_DST_PORT_ipfix; u32 path_mtu; u32 template_interval; u8 udp_checksum; u32 fib_id; u32 fib_index = ~0; int rv = 0; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) return; memcpy (collector.data, mp->collector_address, sizeof (collector.data)); collector_port = ntohs (mp->collector_port); if (collector_port == (u16) ~ 0) collector_port = UDP_DST_PORT_ipfix; memcpy (src.data, mp->src_address, sizeof (src.data)); fib_id = ntohl (mp->vrf_id); ip4_main_t *im = &ip4_main; if (fib_id == ~0) { fib_index = ~0; } else { uword *p = hash_get (im->fib_index_by_table_id, fib_id); if (!p) { rv = VNET_API_ERROR_NO_SUCH_FIB; goto out; } fib_index = p[0]; } path_mtu = ntohl (mp->path_mtu); if (path_mtu == ~0) path_mtu = 512; // RFC 7011 section 10.3.3. template_interval = ntohl (mp->template_interval); if (template_interval == ~0) template_interval = 20; udp_checksum = mp->udp_checksum; if (collector.as_u32 == 0) { rv = VNET_API_ERROR_INVALID_VALUE; goto out; } if (src.as_u32 == 0) { rv = VNET_API_ERROR_INVALID_VALUE; goto out; } if (path_mtu > 1450 /* vpp does not support fragmentation */ ) { rv = VNET_API_ERROR_INVALID_VALUE; goto out; } if (path_mtu < 68) { rv = VNET_API_ERROR_INVALID_VALUE; goto out; } /* Reset report streams if we are reconfiguring IP addresses */ if (frm->ipfix_collector.as_u32 != collector.as_u32 || frm->src_address.as_u32 != src.as_u32 || frm->collector_port != collector_port) vnet_flow_reports_reset (frm); frm->ipfix_collector.as_u32 = collector.as_u32; frm->collector_port = collector_port; frm->src_address.as_u32 = src.as_u32; frm->fib_index = fib_index; frm->path_mtu = path_mtu; frm->template_interval = template_interval; frm->udp_checksum = udp_checksum; /* Turn on the flow reporting process */ vlib_process_signal_event (vm, flow_report_process_node.index, 1, 0); out: REPLY_MACRO (VL_API_SET_IPFIX_EXPORTER_REPLY); } static void vl_api_ipfix_exporter_dump_t_handler (vl_api_ipfix_exporter_dump_t * mp) { flow_report_main_t *frm = &flow_report_main; vl_api_registration_t *reg; vl_api_ipfix_exporter_details_t *rmp; ip4_main_t *im = &ip4_main; u32 vrf_id; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) return; rmp = vl_msg_api_alloc (sizeof (*rmp)); clib_memset (rmp, 0, sizeof (*rmp)); rmp->_vl_msg_id = ntohs (VL_API_IPFIX_EXPORTER_DETAILS); rmp->context = mp->context; memcpy (rmp->collector_address, frm->ipfix_collector.data, sizeof (frm->ipfix_collector.data)); rmp->collector_port = htons (frm->collector_port); memcpy (rmp->src_address, frm->src_address.data, sizeof (frm->src_address.data)); if (frm->fib_index == ~0) vrf_id = ~0; else vrf_id = im->fibs[frm->fib_index].ft_table_id; rmp->vrf_id = htonl (vrf_id); rmp->path_mtu = htonl (frm->path_mtu); rmp->template_interval = htonl (frm->template_interval); rmp->udp_checksum = (frm->udp_checksum != 0); vl_api_send_msg (reg, (u8 *) rmp); } static void vl_api_set_ipfix_classify_stream_t_handler (vl_api_set_ipfix_classify_stream_t * mp) { vl_api_set_ipfix_classify_stream_reply_t *rmp; flow_report_classify_main_t *fcm = &flow_report_classify_main; flow_report_main_t *frm = &flow_report_main; u32 domain_id = 0; u32 src_port = UDP_DST_PORT_ipfix; int rv = 0; domain_id = ntohl (mp->domain_id); src_port = ntohs (mp->src_port); if (fcm->src_port != 0 && (fcm->domain_id != domain_id || fcm->src_port != (u16) src_port)) { int rv = vnet_stream_change (frm, fcm->domain_id, fcm->src_port, domain_id, (u16) src_port); ASSERT (rv == 0); } fcm->domain_id = domain_id; fcm->src_port = (u16) src_port; REPLY_MACRO (VL_API_SET_IPFIX_CLASSIFY_STREAM_REPLY); } static void vl_api_ipfix_classify_stream_dump_t_handler (vl_api_ipfix_classify_stream_dump_t * mp) { flow_report_classify_main_t *fcm = &flow_report_classify_main; vl_api_registration_t *reg; vl_api_ipfix_classify_stream_details_t *rmp; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) return; rmp = vl_msg_api_alloc (sizeof (*rmp)); clib_memset (rmp, 0, sizeof (*rmp)); rmp->_vl_msg_id = ntohs (VL_API_IPFIX_CLASSIFY_STREAM_DETAILS); rmp->context = mp->context; rmp->domain_id = htonl (fcm->domain_id); rmp->src_port = htons (fcm->src_port); vl_api_send_msg (reg, (u8 *) rmp); } static void vl_api_ipfix_classify_table_add_del_t_handler (vl_api_ipfix_classify_table_add_del_t * mp) { vl_api_ipfix_classify_table_add_del_reply_t *rmp; vl_api_registration_t *reg; flow_report_classify_main_t *fcm = &flow_report_classify_main; flow_report_main_t *frm = &flow_report_main; vnet_flow_report_add_del_args_t args; ipfix_classify_table_t *table; int is_add; u32 classify_table_index; u8 ip_version; u8 transport_protocol; int rv = 0; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) return; classify_table_index = ntohl (mp->table_id); ip_version = mp->ip_version; transport_protocol = mp->transport_protocol; is_add = mp->is_add; if (fcm->src_port == 0) { /* call set_ipfix_classify_stream first */ rv = VNET_API_ERROR_UNSPECIFIED; goto out; } clib_memset (&args, 0, sizeof (args)); table = 0; int i; for (i = 0; i < vec_len (fcm->tables); i++) if (ipfix_classify_table_index_valid (i)) if (fcm->tables[i].classify_table_index == classify_table_index) { table = &fcm->tables[i]; break; } if (is_add) { if (table) { rv = VNET_API_ERROR_VALUE_EXIST; goto out; } table = ipfix_classify_add_table (); table->classify_table_index = classify_table_index; } else { if (!table) { rv = VNET_API_ERROR_NO_SUCH_ENTRY; goto out; } } table->ip_version = ip_version; table->transport_protocol = transport_protocol; args.opaque.as_uword = table - fcm->tables; args.rewrite_callback = ipfix_classify_template_rewrite; args.flow_data_callback = ipfix_classify_send_flows; args.is_add = is_add; args.domain_id = fcm->domain_id; args.src_port = fcm->src_port; rv = vnet_flow_report_add_del (frm, &args, NULL); /* If deleting, or add failed */ if (is_add == 0 || (rv && is_add)) ipfix_classify_delete_table (table - fcm->tables); out: REPLY_MACRO (VL_API_SET_IPFIX_CLASSIFY_STREAM_REPLY); } static void send_ipfix_classify_table_details (u32 table_index, vl_api_registration_t * reg, u32 context) { flow_report_classify_main_t *fcm = &flow_report_classify_main; vl_api_ipfix_classify_table_details_t *mp; ipfix_classify_table_t *table = &fcm->tables[table_index]; mp = vl_msg_api_alloc (sizeof (*mp)); clib_memset (mp, 0, sizeof (*mp)); mp->_vl_msg_id = ntohs (VL_API_IPFIX_CLASSIFY_TABLE_DETAILS); mp->context = context; mp->table_id = htonl (table->classify_table_index); mp->ip_version = table->ip_version; mp->transport_protocol = table->transport_protocol; vl_api_send_msg (reg, (u8 *) mp); } static void vl_api_ipfix_classify_table_dump_t_handler (vl_api_ipfix_classify_table_dump_t * mp) { flow_report_classify_main_t *fcm = &flow_report_classify_main; vl_api_registration_t *reg; u32 i; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) return; for (i = 0; i < vec_len (fcm->tables); i++) if (ipfix_classify_table_index_valid (i)) send_ipfix_classify_table_details (i, reg, mp->context); } static void vl_api_ipfix_flush_t_handler (vl_api_ipfix_flush_t * mp) { vl_api_ipfix_flush_reply_t *rmp; vl_api_registration_t *reg; vlib_main_t *vm = vlib_get_main (); int rv = 0; reg = vl_api_client_index_to_registration (mp->client_index); if (!reg) return; /* poke the flow reporting process */ vlib_process_signal_event (vm, flow_report_process_node.index, 1 /* type_opaque */ , 0 /* data */ ); REPLY_MACRO (VL_API_IPFIX_FLUSH_REPLY); } /* * flow_api_hookup * Add vpe's API message handlers to the table. * vlib has already mapped shared memory and * added the client registration handlers. * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process() */ #define vl_msg_name_crc_list #include <vnet/vnet_all_api_h.h> #undef vl_msg_name_crc_list static void setup_message_id_table (api_main_t * am) { #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id); foreach_vl_msg_name_crc_ipfix_export; #undef _ } static clib_error_t * flow_api_hookup (vlib_main_t * vm) { api_main_t *am = &api_main; #define _(N,n) \ vl_msg_api_set_handlers(VL_API_##N, #n, \ vl_api_##n##_t_handler, \ vl_noop_handler, \ vl_api_##n##_t_endian, \ vl_api_##n##_t_print, \ sizeof(vl_api_##n##_t), 1); foreach_vpe_api_msg; #undef _ /* * Set up the (msg_name, crc, message-id) table */ setup_message_id_table (am); return 0; } VLIB_API_INIT_FUNCTION (flow_api_hookup); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */