Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016 Cisco and/or its affiliates. |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | #include <vnet/session/application_interface.h> |
| 16 | |
| 17 | #include <vnet/session/session.h> |
| 18 | #include <vlibmemory/api.h> |
| 19 | #include <vnet/dpo/load_balance.h> |
| 20 | #include <vnet/fib/ip4_fib.h> |
| 21 | |
| 22 | /** @file |
| 23 | VPP's application/session API bind/unbind/connect/disconnect calls |
| 24 | */ |
| 25 | |
| 26 | static u8 |
| 27 | ip_is_zero (ip46_address_t * ip46_address, u8 is_ip4) |
| 28 | { |
| 29 | if (is_ip4) |
| 30 | return (ip46_address->ip4.as_u32 == 0); |
| 31 | else |
| 32 | return (ip46_address->as_u64[0] == 0 && ip46_address->as_u64[1] == 0); |
| 33 | } |
| 34 | |
| 35 | static u8 |
| 36 | ip_is_local (ip46_address_t * ip46_address, u8 is_ip4) |
| 37 | { |
| 38 | fib_node_index_t fei; |
| 39 | fib_entry_flag_t flags; |
| 40 | fib_prefix_t prefix; |
| 41 | |
| 42 | /* Check if requester is local */ |
| 43 | if (is_ip4) |
| 44 | { |
| 45 | prefix.fp_len = 32; |
| 46 | prefix.fp_proto = FIB_PROTOCOL_IP4; |
| 47 | } |
| 48 | else |
| 49 | { |
| 50 | prefix.fp_len = 128; |
| 51 | prefix.fp_proto = FIB_PROTOCOL_IP6; |
| 52 | } |
| 53 | |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame^] | 54 | clib_memcpy (&prefix.fp_addr, ip46_address, sizeof (ip46_address_t)); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 55 | fei = fib_table_lookup (0, &prefix); |
| 56 | flags = fib_entry_get_flags (fei); |
| 57 | |
| 58 | return (flags & FIB_ENTRY_FLAG_LOCAL); |
| 59 | } |
| 60 | |
| 61 | int |
| 62 | api_parse_session_handle (u64 handle, u32 * session_index, u32 * thread_index) |
| 63 | { |
| 64 | session_manager_main_t *smm = vnet_get_session_manager_main (); |
| 65 | stream_session_t *pool; |
| 66 | |
| 67 | *thread_index = handle & 0xFFFFFFFF; |
| 68 | *session_index = handle >> 32; |
| 69 | |
| 70 | if (*thread_index >= vec_len (smm->sessions)) |
| 71 | return VNET_API_ERROR_INVALID_VALUE; |
| 72 | |
| 73 | pool = smm->sessions[*thread_index]; |
| 74 | |
| 75 | if (pool_is_free_index (pool, *session_index)) |
| 76 | return VNET_API_ERROR_INVALID_VALUE_2; |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | int |
| 82 | vnet_bind_i (u32 api_client_index, ip46_address_t * ip46, u16 port_host_order, |
| 83 | session_type_t sst, u64 * options, session_cb_vft_t * cb_fns, |
| 84 | application_t ** app, u32 * len_seg_name, char *seg_name) |
| 85 | { |
| 86 | u8 *segment_name = 0; |
| 87 | application_t *server = 0; |
| 88 | stream_session_t *listener; |
| 89 | u8 is_ip4; |
| 90 | |
| 91 | listener = |
| 92 | stream_session_lookup_listener (ip46, |
| 93 | clib_host_to_net_u16 (port_host_order), |
| 94 | sst); |
| 95 | |
| 96 | if (listener) |
| 97 | return VNET_API_ERROR_ADDRESS_IN_USE; |
| 98 | |
| 99 | if (application_lookup (api_client_index)) |
| 100 | { |
| 101 | clib_warning ("Only one bind supported for now"); |
| 102 | return VNET_API_ERROR_ADDRESS_IN_USE; |
| 103 | } |
| 104 | |
| 105 | is_ip4 = SESSION_TYPE_IP4_UDP == sst || SESSION_TYPE_IP4_TCP == sst; |
| 106 | if (!ip_is_zero (ip46, is_ip4) && !ip_is_local (ip46, is_ip4)) |
| 107 | return VNET_API_ERROR_INVALID_VALUE; |
| 108 | |
| 109 | /* Allocate and initialize stream server */ |
| 110 | server = application_new (APP_SERVER, sst, api_client_index, |
| 111 | options[SESSION_OPTIONS_FLAGS], cb_fns); |
| 112 | |
| 113 | application_server_init (server, options[SESSION_OPTIONS_SEGMENT_SIZE], |
| 114 | options[SESSION_OPTIONS_ADD_SEGMENT_SIZE], |
| 115 | options[SESSION_OPTIONS_RX_FIFO_SIZE], |
| 116 | options[SESSION_OPTIONS_TX_FIFO_SIZE], |
| 117 | &segment_name); |
| 118 | |
| 119 | /* Setup listen path down to transport */ |
| 120 | stream_session_start_listen (server->index, ip46, port_host_order); |
| 121 | |
| 122 | /* |
| 123 | * Return values |
| 124 | */ |
| 125 | |
| 126 | ASSERT (vec_len (segment_name) <= 128); |
| 127 | *len_seg_name = vec_len (segment_name); |
| 128 | memcpy (seg_name, segment_name, *len_seg_name); |
| 129 | *app = server; |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | int |
| 135 | vnet_unbind_i (u32 api_client_index) |
| 136 | { |
| 137 | application_t *server; |
| 138 | |
| 139 | /* |
| 140 | * Find the stream_server_t corresponding to the api client |
| 141 | */ |
| 142 | server = application_lookup (api_client_index); |
| 143 | if (!server) |
| 144 | return VNET_API_ERROR_INVALID_VALUE_2; |
| 145 | |
| 146 | /* Clear the listener */ |
| 147 | stream_session_stop_listen (server->index); |
| 148 | application_del (server); |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | int |
| 154 | vnet_connect_i (u32 api_client_index, u32 api_context, session_type_t sst, |
| 155 | ip46_address_t * ip46, u16 port, u64 * options, void *mp, |
| 156 | session_cb_vft_t * cb_fns) |
| 157 | { |
| 158 | stream_session_t *listener; |
| 159 | application_t *server, *app; |
| 160 | |
| 161 | /* |
| 162 | * Figure out if connecting to a local server |
| 163 | */ |
| 164 | listener = stream_session_lookup_listener (ip46, |
| 165 | clib_host_to_net_u16 (port), |
| 166 | sst); |
| 167 | if (listener) |
| 168 | { |
| 169 | server = application_get (listener->app_index); |
| 170 | |
| 171 | /* |
| 172 | * Server is willing to have a direct fifo connection created |
| 173 | * instead of going through the state machine, etc. |
| 174 | */ |
| 175 | if (server->flags & SESSION_OPTIONS_FLAGS_USE_FIFO) |
| 176 | return server->cb_fns. |
| 177 | redirect_connect_callback (server->api_client_index, mp); |
| 178 | } |
| 179 | |
| 180 | /* Create client app */ |
| 181 | app = application_new (APP_CLIENT, sst, api_client_index, |
| 182 | options[SESSION_OPTIONS_FLAGS], cb_fns); |
| 183 | |
| 184 | app->api_context = api_context; |
| 185 | |
| 186 | /* |
| 187 | * Not connecting to a local server. Create regular session |
| 188 | */ |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame^] | 189 | return stream_session_open (sst, ip46, port, app->index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | /** |
| 193 | * unformat a vnet URI |
| 194 | * |
| 195 | * fifo://name |
| 196 | * tcp://ip46-addr:port |
| 197 | * udp://ip46-addr:port |
| 198 | * |
| 199 | * u8 ip46_address[16]; |
| 200 | * u16 port_in_host_byte_order; |
| 201 | * stream_session_type_t sst; |
| 202 | * u8 *fifo_name; |
| 203 | * |
| 204 | * if (unformat (input, "%U", unformat_vnet_uri, &ip46_address, |
| 205 | * &sst, &port, &fifo_name)) |
| 206 | * etc... |
| 207 | * |
| 208 | */ |
| 209 | uword |
| 210 | unformat_vnet_uri (unformat_input_t * input, va_list * args) |
| 211 | { |
| 212 | ip46_address_t *address = va_arg (*args, ip46_address_t *); |
| 213 | session_type_t *sst = va_arg (*args, session_type_t *); |
| 214 | u16 *port = va_arg (*args, u16 *); |
| 215 | |
| 216 | if (unformat (input, "tcp://%U/%d", unformat_ip4_address, &address->ip4, |
| 217 | port)) |
| 218 | { |
| 219 | *sst = SESSION_TYPE_IP4_TCP; |
| 220 | return 1; |
| 221 | } |
| 222 | if (unformat (input, "udp://%U/%d", unformat_ip4_address, &address->ip4, |
| 223 | port)) |
| 224 | { |
| 225 | *sst = SESSION_TYPE_IP4_UDP; |
| 226 | return 1; |
| 227 | } |
| 228 | if (unformat (input, "udp://%U/%d", unformat_ip6_address, &address->ip6, |
| 229 | port)) |
| 230 | { |
| 231 | *sst = SESSION_TYPE_IP6_UDP; |
| 232 | return 1; |
| 233 | } |
| 234 | if (unformat (input, "tcp://%U/%d", unformat_ip6_address, &address->ip6, |
| 235 | port)) |
| 236 | { |
| 237 | *sst = SESSION_TYPE_IP6_TCP; |
| 238 | return 1; |
| 239 | } |
| 240 | |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | int |
| 245 | parse_uri (char *uri, session_type_t * sst, ip46_address_t * addr, |
| 246 | u16 * port_number_host_byte_order) |
| 247 | { |
| 248 | unformat_input_t _input, *input = &_input; |
| 249 | |
| 250 | /* Make sure */ |
| 251 | uri = (char *) format (0, "%s%c", uri, 0); |
| 252 | |
| 253 | /* Parse uri */ |
| 254 | unformat_init_string (input, uri, strlen (uri)); |
| 255 | if (!unformat (input, "%U", unformat_vnet_uri, addr, sst, |
| 256 | port_number_host_byte_order)) |
| 257 | { |
| 258 | unformat_free (input); |
| 259 | return VNET_API_ERROR_INVALID_VALUE; |
| 260 | } |
| 261 | unformat_free (input); |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | int |
| 267 | vnet_bind_uri (vnet_bind_args_t * a) |
| 268 | { |
| 269 | application_t *server = 0; |
| 270 | u16 port_host_order; |
| 271 | session_type_t sst = SESSION_N_TYPES; |
| 272 | ip46_address_t ip46; |
| 273 | int rv; |
| 274 | |
| 275 | memset (&ip46, 0, sizeof (ip46)); |
| 276 | rv = parse_uri (a->uri, &sst, &ip46, &port_host_order); |
| 277 | if (rv) |
| 278 | return rv; |
| 279 | |
| 280 | if ((rv = vnet_bind_i (a->api_client_index, &ip46, port_host_order, sst, |
| 281 | a->options, a->session_cb_vft, &server, |
| 282 | &a->segment_name_length, a->segment_name))) |
| 283 | return rv; |
| 284 | |
| 285 | a->server_event_queue_address = (u64) server->event_queue; |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | session_type_t |
| 290 | session_type_from_proto_and_ip (session_api_proto_t proto, u8 is_ip4) |
| 291 | { |
| 292 | if (proto == SESSION_PROTO_TCP) |
| 293 | { |
| 294 | if (is_ip4) |
| 295 | return SESSION_TYPE_IP4_TCP; |
| 296 | else |
| 297 | return SESSION_TYPE_IP6_TCP; |
| 298 | } |
| 299 | else |
| 300 | { |
| 301 | if (is_ip4) |
| 302 | return SESSION_TYPE_IP4_UDP; |
| 303 | else |
| 304 | return SESSION_TYPE_IP6_UDP; |
| 305 | } |
| 306 | |
| 307 | return SESSION_N_TYPES; |
| 308 | } |
| 309 | |
| 310 | int |
| 311 | vnet_unbind_uri (char *uri, u32 api_client_index) |
| 312 | { |
| 313 | u16 port_number_host_byte_order; |
| 314 | session_type_t sst = SESSION_N_TYPES; |
| 315 | ip46_address_t ip46_address; |
| 316 | stream_session_t *listener; |
| 317 | int rv; |
| 318 | |
| 319 | rv = parse_uri (uri, &sst, &ip46_address, &port_number_host_byte_order); |
| 320 | if (rv) |
| 321 | return rv; |
| 322 | |
| 323 | listener = |
| 324 | stream_session_lookup_listener (&ip46_address, |
| 325 | clib_host_to_net_u16 |
| 326 | (port_number_host_byte_order), sst); |
| 327 | |
| 328 | if (!listener) |
| 329 | return VNET_API_ERROR_ADDRESS_NOT_IN_USE; |
| 330 | |
| 331 | /* External client? */ |
| 332 | if (api_client_index != ~0) |
| 333 | { |
| 334 | ASSERT (vl_api_client_index_to_registration (api_client_index)); |
| 335 | } |
| 336 | |
| 337 | return vnet_unbind_i (api_client_index); |
| 338 | } |
| 339 | |
| 340 | int |
| 341 | vnet_connect_uri (vnet_connect_args_t * a) |
| 342 | { |
| 343 | ip46_address_t ip46_address; |
| 344 | u16 port; |
| 345 | session_type_t sst; |
| 346 | application_t *app; |
| 347 | int rv; |
| 348 | |
| 349 | app = application_lookup (a->api_client_index); |
| 350 | if (app) |
| 351 | { |
| 352 | clib_warning ("Already have a connect from this app"); |
| 353 | return VNET_API_ERROR_INVALID_VALUE_2; |
| 354 | } |
| 355 | |
| 356 | /* Parse uri */ |
| 357 | rv = parse_uri (a->uri, &sst, &ip46_address, &port); |
| 358 | if (rv) |
| 359 | return rv; |
| 360 | |
| 361 | return vnet_connect_i (a->api_client_index, a->api_context, sst, |
| 362 | &ip46_address, port, a->options, a->mp, |
| 363 | a->session_cb_vft); |
| 364 | } |
| 365 | |
| 366 | int |
| 367 | vnet_disconnect_session (u32 client_index, u32 session_index, |
| 368 | u32 thread_index) |
| 369 | { |
| 370 | stream_session_t *session; |
| 371 | |
| 372 | session = stream_session_get (session_index, thread_index); |
| 373 | stream_session_disconnect (session); |
| 374 | |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | |
| 379 | int |
| 380 | vnet_bind (vnet_bind_args_t * a) |
| 381 | { |
| 382 | application_t *server = 0; |
| 383 | session_type_t sst = SESSION_N_TYPES; |
| 384 | int rv; |
| 385 | |
| 386 | sst = session_type_from_proto_and_ip (a->proto, a->tep.is_ip4); |
| 387 | if ((rv = vnet_bind_i (a->api_client_index, &a->tep.ip, a->tep.port, sst, |
| 388 | a->options, a->session_cb_vft, &server, |
| 389 | &a->segment_name_length, a->segment_name))) |
| 390 | return rv; |
| 391 | |
| 392 | a->server_event_queue_address = (u64) server->event_queue; |
| 393 | a->handle = (u64) a->tep.vrf << 32 | (u64) server->session_index; |
| 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | int |
| 398 | vnet_unbind (vnet_unbind_args_t * a) |
| 399 | { |
| 400 | application_t *server; |
| 401 | |
| 402 | if (a->api_client_index != ~0) |
| 403 | { |
| 404 | ASSERT (vl_api_client_index_to_registration (a->api_client_index)); |
| 405 | } |
| 406 | |
| 407 | /* Make sure this is the right one */ |
| 408 | server = application_lookup (a->api_client_index); |
| 409 | ASSERT (server->session_index == (0xFFFFFFFF & a->handle)); |
| 410 | |
| 411 | /* TODO use handle to disambiguate namespaces/vrfs */ |
| 412 | return vnet_unbind_i (a->api_client_index); |
| 413 | } |
| 414 | |
| 415 | int |
| 416 | vnet_connect (vnet_connect_args_t * a) |
| 417 | { |
| 418 | session_type_t sst; |
| 419 | application_t *app; |
| 420 | |
| 421 | app = application_lookup (a->api_client_index); |
| 422 | if (app) |
| 423 | { |
| 424 | clib_warning ("Already have a connect from this app"); |
| 425 | return VNET_API_ERROR_INVALID_VALUE_2; |
| 426 | } |
| 427 | |
| 428 | sst = session_type_from_proto_and_ip (a->proto, a->tep.is_ip4); |
| 429 | return vnet_connect_i (a->api_client_index, a->api_context, sst, &a->tep.ip, |
| 430 | a->tep.port, a->options, a->mp, a->session_cb_vft); |
| 431 | } |
| 432 | |
| 433 | int |
| 434 | vnet_disconnect (vnet_disconnect_args_t * a) |
| 435 | { |
| 436 | stream_session_t *session; |
| 437 | u32 session_index, thread_index; |
| 438 | |
| 439 | if (api_parse_session_handle (a->handle, &session_index, &thread_index)) |
| 440 | { |
| 441 | clib_warning ("Invalid handle"); |
| 442 | return -1; |
| 443 | } |
| 444 | |
| 445 | session = stream_session_get (session_index, thread_index); |
| 446 | stream_session_disconnect (session); |
| 447 | |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | /* |
| 452 | * fd.io coding-style-patch-verification: ON |
| 453 | * |
| 454 | * Local Variables: |
| 455 | * eval: (c-set-style "gnu") |
| 456 | * End: |
| 457 | */ |