Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Stream processing offload engine management. |
| 3 | * |
| 4 | * Copyright 2016 HAProxy Technologies, Christopher Faulet <cfaulet@haproxy.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | #include <ctype.h> |
| 13 | #include <errno.h> |
| 14 | |
| 15 | #include <common/buffer.h> |
| 16 | #include <common/cfgparse.h> |
| 17 | #include <common/compat.h> |
| 18 | #include <common/config.h> |
| 19 | #include <common/debug.h> |
| 20 | #include <common/memory.h> |
| 21 | #include <common/time.h> |
| 22 | |
| 23 | #include <types/arg.h> |
| 24 | #include <types/filters.h> |
| 25 | #include <types/global.h> |
| 26 | #include <types/proxy.h> |
| 27 | #include <types/sample.h> |
| 28 | #include <types/stream.h> |
| 29 | |
| 30 | #include <proto/arg.h> |
| 31 | #include <proto/backend.h> |
| 32 | #include <proto/filters.h> |
| 33 | #include <proto/frontend.h> |
| 34 | #include <proto/log.h> |
| 35 | #include <proto/proto_http.h> |
| 36 | #include <proto/proxy.h> |
| 37 | #include <proto/sample.h> |
| 38 | #include <proto/session.h> |
| 39 | #include <proto/signal.h> |
| 40 | #include <proto/stream.h> |
| 41 | #include <proto/stream_interface.h> |
| 42 | #include <proto/task.h> |
| 43 | #include <proto/vars.h> |
| 44 | |
| 45 | #if defined(DEBUG_SPOE) || defined(DEBUG_FULL) |
| 46 | #define SPOE_PRINTF(x...) fprintf(x) |
| 47 | #else |
| 48 | #define SPOE_PRINTF(x...) |
| 49 | #endif |
| 50 | |
| 51 | /* Helper to get ctx inside an appctx */ |
| 52 | #define APPCTX_SPOE(appctx) ((appctx)->ctx.spoe) |
| 53 | |
| 54 | /* TODO: add an option to customize these values */ |
| 55 | /* The maximum number of new applet waiting the end of the hello handshake */ |
| 56 | #define MAX_NEW_SPOE_APPLETS 5 |
| 57 | |
| 58 | /* The maximum number of error when a stream is waiting of a SPOE applet */ |
| 59 | #define MAX_NEW_SPOE_APPLET_ERRS 3 |
| 60 | |
| 61 | /* Minimal size for a frame */ |
| 62 | #define MIN_FRAME_SIZE 256 |
| 63 | |
Christopher Faulet | ea62c2a | 2016-11-14 10:54:21 +0100 | [diff] [blame^] | 64 | /* Flags set on the SPOE agent */ |
| 65 | #define SPOE_FL_CONT_ON_ERR 0x00000001 /* Do not stop events processing when an error occurred */ |
| 66 | |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 67 | /* Flags set on the SPOE context */ |
| 68 | #define SPOE_CTX_FL_CLI_CONNECTED 0x00000001 /* Set after that on-client-session event was processed */ |
| 69 | #define SPOE_CTX_FL_SRV_CONNECTED 0x00000002 /* Set after that on-server-session event was processed */ |
| 70 | #define SPOE_CTX_FL_REQ_PROCESS 0x00000004 /* Set when SPOE is processing the request */ |
| 71 | #define SPOE_CTX_FL_RSP_PROCESS 0x00000008 /* Set when SPOE is processing the response */ |
| 72 | |
| 73 | #define SPOE_CTX_FL_PROCESS (SPOE_CTX_FL_REQ_PROCESS|SPOE_CTX_FL_RSP_PROCESS) |
| 74 | |
| 75 | #define SPOE_APPCTX_ERR_NONE 0x00000000 /* no error yet, leave it to zero */ |
| 76 | #define SPOE_APPCTX_ERR_TOUT 0x00000001 /* SPOE applet timeout */ |
| 77 | |
| 78 | /* All possible states for a SPOE context */ |
| 79 | enum spoe_ctx_state { |
| 80 | SPOE_CTX_ST_NONE = 0, |
| 81 | SPOE_CTX_ST_READY, |
| 82 | SPOE_CTX_ST_SENDING_MSGS, |
| 83 | SPOE_CTX_ST_WAITING_ACK, |
| 84 | SPOE_CTX_ST_DONE, |
| 85 | SPOE_CTX_ST_ERROR, |
| 86 | }; |
| 87 | |
| 88 | /* All possible states for a SPOE applet */ |
| 89 | enum spoe_appctx_state { |
| 90 | SPOE_APPCTX_ST_CONNECT = 0, |
| 91 | SPOE_APPCTX_ST_CONNECTING, |
| 92 | SPOE_APPCTX_ST_PROCESSING, |
| 93 | SPOE_APPCTX_ST_DISCONNECT, |
| 94 | SPOE_APPCTX_ST_DISCONNECTING, |
| 95 | SPOE_APPCTX_ST_EXIT, |
| 96 | SPOE_APPCTX_ST_END, |
| 97 | }; |
| 98 | |
| 99 | /* All supported SPOE actions */ |
| 100 | enum spoe_action_type { |
| 101 | SPOE_ACT_T_SET_VAR = 1, |
| 102 | SPOE_ACT_T_UNSET_VAR, |
| 103 | SPOE_ACT_TYPES, |
| 104 | }; |
| 105 | |
| 106 | /* All supported SPOE events */ |
| 107 | enum spoe_event { |
| 108 | SPOE_EV_NONE = 0, |
| 109 | |
| 110 | /* Request events */ |
| 111 | SPOE_EV_ON_CLIENT_SESS = 1, |
| 112 | SPOE_EV_ON_TCP_REQ_FE, |
| 113 | SPOE_EV_ON_TCP_REQ_BE, |
| 114 | SPOE_EV_ON_HTTP_REQ_FE, |
| 115 | SPOE_EV_ON_HTTP_REQ_BE, |
| 116 | |
| 117 | /* Response events */ |
| 118 | SPOE_EV_ON_SERVER_SESS, |
| 119 | SPOE_EV_ON_TCP_RSP, |
| 120 | SPOE_EV_ON_HTTP_RSP, |
| 121 | |
| 122 | SPOE_EV_EVENTS |
| 123 | }; |
| 124 | |
| 125 | /* Errors triggerd by SPOE applet */ |
| 126 | enum spoe_frame_error { |
| 127 | SPOE_FRM_ERR_NONE = 0, |
| 128 | SPOE_FRM_ERR_IO, |
| 129 | SPOE_FRM_ERR_TOUT, |
| 130 | SPOE_FRM_ERR_TOO_BIG, |
| 131 | SPOE_FRM_ERR_INVALID, |
| 132 | SPOE_FRM_ERR_NO_VSN, |
| 133 | SPOE_FRM_ERR_NO_FRAME_SIZE, |
| 134 | SPOE_FRM_ERR_NO_CAP, |
| 135 | SPOE_FRM_ERR_BAD_VSN, |
| 136 | SPOE_FRM_ERR_BAD_FRAME_SIZE, |
| 137 | SPOE_FRM_ERR_UNKNOWN = 99, |
| 138 | SPOE_FRM_ERRS, |
| 139 | }; |
| 140 | |
| 141 | /* Scopes used for variables set by agents. It is a way to be agnotic to vars |
| 142 | * scope. */ |
| 143 | enum spoe_vars_scope { |
| 144 | SPOE_SCOPE_PROC = 0, /* <=> SCOPE_PROC */ |
| 145 | SPOE_SCOPE_SESS, /* <=> SCOPE_SESS */ |
| 146 | SPOE_SCOPE_TXN, /* <=> SCOPE_TXN */ |
| 147 | SPOE_SCOPE_REQ, /* <=> SCOPE_REQ */ |
| 148 | SPOE_SCOPE_RES, /* <=> SCOPE_RES */ |
| 149 | }; |
| 150 | |
| 151 | |
| 152 | /* Describe an argument that will be linked to a message. It is a sample fetch, |
| 153 | * with an optional name. */ |
| 154 | struct spoe_arg { |
| 155 | char *name; /* Name of the argument, may be NULL */ |
| 156 | unsigned int name_len; /* The name length, 0 if NULL */ |
| 157 | struct sample_expr *expr; /* Sample expression */ |
| 158 | struct list list; /* Used to chain SPOE args */ |
| 159 | }; |
| 160 | |
| 161 | /* Used during the config parsing only because, when a SPOE agent section is |
| 162 | * parsed, messages can be undefined. */ |
| 163 | struct spoe_msg_placeholder { |
| 164 | char *id; /* SPOE message placeholder id */ |
| 165 | struct list list; /* Use to chain SPOE message placeholders */ |
| 166 | }; |
| 167 | |
| 168 | /* Describe a message that will be sent in a NOTIFY frame. A message has a name, |
| 169 | * an argument list (see above) and it is linked to a specific event. */ |
| 170 | struct spoe_message { |
| 171 | char *id; /* SPOE message id */ |
| 172 | unsigned int id_len; /* The message id length */ |
| 173 | struct spoe_agent *agent; /* SPOE agent owning this SPOE message */ |
| 174 | struct { |
| 175 | char *file; /* file where the SPOE message appears */ |
| 176 | int line; /* line where the SPOE message appears */ |
| 177 | } conf; /* config information */ |
| 178 | struct list args; /* Arguments added when the SPOE messages is sent */ |
| 179 | struct list list; /* Used to chain SPOE messages */ |
| 180 | |
| 181 | enum spoe_event event; /* SPOE_EV_* */ |
| 182 | }; |
| 183 | |
| 184 | /* Describe a SPOE agent. */ |
| 185 | struct spoe_agent { |
| 186 | char *id; /* SPOE agent id (name) */ |
| 187 | struct { |
| 188 | char *file; /* file where the SPOE agent appears */ |
| 189 | int line; /* line where the SPOE agent appears */ |
| 190 | } conf; /* config information */ |
| 191 | union { |
| 192 | struct proxy *be; /* Backend used by this agent */ |
| 193 | char *name; /* Backend name used during conf parsing */ |
| 194 | } b; |
| 195 | struct { |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 196 | unsigned int hello; /* Max time to receive AGENT-HELLO frame (in SPOE applet) */ |
| 197 | unsigned int idle; /* Max Idle timeout (in SPOE applet) */ |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 198 | unsigned int processing; /* Max time to process an event (in the main stream) */ |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 199 | } timeout; |
| 200 | |
| 201 | char *var_pfx; /* Prefix used for vars set by the agent */ |
Christopher Faulet | ea62c2a | 2016-11-14 10:54:21 +0100 | [diff] [blame^] | 202 | unsigned int flags; /* SPOE_FL_* */ |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 203 | |
| 204 | struct list cache; /* List used to cache SPOE streams. In |
| 205 | * fact, we cache the SPOE applect ctx */ |
| 206 | |
| 207 | struct list messages[SPOE_EV_EVENTS]; /* List of SPOE messages that will be sent |
| 208 | * for each supported events */ |
| 209 | |
| 210 | struct list applet_wq; /* List of streams waiting for a SPOE applet */ |
| 211 | unsigned int new_applets; /* The number of new SPOE applets */ |
| 212 | }; |
| 213 | |
| 214 | /* SPOE filter configuration */ |
| 215 | struct spoe_config { |
| 216 | struct proxy *proxy; /* Proxy owning the filter */ |
| 217 | struct spoe_agent *agent; /* Agent used by this filter */ |
| 218 | struct proxy agent_fe; /* Agent frontend */ |
| 219 | }; |
| 220 | |
| 221 | /* SPOE context attached to a stream. It is the main structure that handles the |
| 222 | * processing offload */ |
| 223 | struct spoe_context { |
| 224 | struct filter *filter; /* The SPOE filter */ |
| 225 | struct stream *strm; /* The stream that should be offloaded */ |
| 226 | struct appctx *appctx; /* The SPOE appctx */ |
| 227 | struct list *messages; /* List of messages that will be sent during the stream processing */ |
| 228 | struct buffer *buffer; /* Buffer used to store a NOTIFY or ACK frame */ |
| 229 | struct list buffer_wait; /* position in the list of streams waiting for a buffer */ |
| 230 | struct list applet_wait; /* position in the list of streams waiting for a SPOE applet */ |
| 231 | |
| 232 | unsigned int errs; /* The number of errors to acquire a SPOE applet */ |
| 233 | |
| 234 | enum spoe_ctx_state state; /* SPOE_CTX_ST_* */ |
| 235 | unsigned int flags; /* SPOE_CTX_FL_* */ |
| 236 | |
| 237 | unsigned int stream_id; /* stream_id and frame_id are used */ |
| 238 | unsigned int frame_id; /* to map NOTIFY and ACK frames */ |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 239 | unsigned int process_exp; /* expiration date to process an event */ |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 240 | }; |
| 241 | |
| 242 | /* Set if the handle on SIGUSR1 is registered */ |
| 243 | static int sighandler_registered = 0; |
| 244 | |
| 245 | /* proxy used during the parsing */ |
| 246 | struct proxy *curproxy = NULL; |
| 247 | |
| 248 | /* The name of the SPOE engine, used during the parsing */ |
| 249 | char *curengine = NULL; |
| 250 | |
| 251 | /* SPOE agent used during the parsing */ |
| 252 | struct spoe_agent *curagent = NULL; |
| 253 | |
| 254 | /* SPOE message used during the parsing */ |
| 255 | struct spoe_message *curmsg = NULL; |
| 256 | |
| 257 | /* list of SPOE messages and placeholders used during the parsing */ |
| 258 | struct list curmsgs; |
| 259 | struct list curmps; |
| 260 | |
| 261 | /* Pool used to allocate new SPOE contexts */ |
| 262 | static struct pool_head *pool2_spoe_ctx = NULL; |
| 263 | |
| 264 | /* Temporary variables used to ease error processing */ |
| 265 | int spoe_status_code = SPOE_FRM_ERR_NONE; |
| 266 | char spoe_reason[256]; |
| 267 | |
| 268 | struct flt_ops spoe_ops; |
| 269 | |
| 270 | static void offer_spoe_appctx(struct spoe_agent *agent, struct appctx *appctx); |
| 271 | static void on_new_spoe_appctx_failure(struct spoe_agent *agent); |
| 272 | static void on_new_spoe_appctx_success(struct spoe_agent *agent, struct appctx *appctx); |
| 273 | |
| 274 | /******************************************************************** |
| 275 | * helper functions/globals |
| 276 | ********************************************************************/ |
| 277 | static void |
| 278 | release_spoe_msg_placeholder(struct spoe_msg_placeholder *mp) |
| 279 | { |
| 280 | if (!mp) |
| 281 | return; |
| 282 | free(mp->id); |
| 283 | free(mp); |
| 284 | } |
| 285 | |
| 286 | |
| 287 | static void |
| 288 | release_spoe_message(struct spoe_message *msg) |
| 289 | { |
| 290 | struct spoe_arg *arg, *back; |
| 291 | |
| 292 | if (!msg) |
| 293 | return; |
| 294 | free(msg->id); |
| 295 | free(msg->conf.file); |
| 296 | list_for_each_entry_safe(arg, back, &msg->args, list) { |
| 297 | release_sample_expr(arg->expr); |
| 298 | free(arg->name); |
| 299 | LIST_DEL(&arg->list); |
| 300 | free(arg); |
| 301 | } |
| 302 | free(msg); |
| 303 | } |
| 304 | |
| 305 | static void |
| 306 | release_spoe_agent(struct spoe_agent *agent) |
| 307 | { |
| 308 | struct spoe_message *msg, *back; |
| 309 | int i; |
| 310 | |
| 311 | if (!agent) |
| 312 | return; |
| 313 | free(agent->id); |
| 314 | free(agent->conf.file); |
| 315 | free(agent->var_pfx); |
| 316 | for (i = 0; i < SPOE_EV_EVENTS; ++i) { |
| 317 | list_for_each_entry_safe(msg, back, &agent->messages[i], list) { |
| 318 | LIST_DEL(&msg->list); |
| 319 | release_spoe_message(msg); |
| 320 | } |
| 321 | } |
| 322 | free(agent); |
| 323 | } |
| 324 | |
| 325 | static const char *spoe_frm_err_reasons[SPOE_FRM_ERRS] = { |
| 326 | [SPOE_FRM_ERR_NONE] = "normal", |
| 327 | [SPOE_FRM_ERR_IO] = "I/O error", |
| 328 | [SPOE_FRM_ERR_TOUT] = "a timeout occurred", |
| 329 | [SPOE_FRM_ERR_TOO_BIG] = "frame is too big", |
| 330 | [SPOE_FRM_ERR_INVALID] = "invalid frame received", |
| 331 | [SPOE_FRM_ERR_NO_VSN] = "version value not found", |
| 332 | [SPOE_FRM_ERR_NO_FRAME_SIZE] = "max-frame-size value not found", |
| 333 | [SPOE_FRM_ERR_NO_CAP] = "capabilities value not found", |
| 334 | [SPOE_FRM_ERR_BAD_VSN] = "unsupported version", |
| 335 | [SPOE_FRM_ERR_BAD_FRAME_SIZE] = "max-frame-size too big or too small", |
| 336 | [SPOE_FRM_ERR_UNKNOWN] = "an unknown error occurred", |
| 337 | }; |
| 338 | |
| 339 | static const char *spoe_event_str[SPOE_EV_EVENTS] = { |
| 340 | [SPOE_EV_ON_CLIENT_SESS] = "on-client-session", |
| 341 | [SPOE_EV_ON_TCP_REQ_FE] = "on-frontend-tcp-request", |
| 342 | [SPOE_EV_ON_TCP_REQ_BE] = "on-backend-tcp-request", |
| 343 | [SPOE_EV_ON_HTTP_REQ_FE] = "on-frontend-http-request", |
| 344 | [SPOE_EV_ON_HTTP_REQ_BE] = "on-backend-http-request", |
| 345 | |
| 346 | [SPOE_EV_ON_SERVER_SESS] = "on-server-session", |
| 347 | [SPOE_EV_ON_TCP_RSP] = "on-tcp-response", |
| 348 | [SPOE_EV_ON_HTTP_RSP] = "on-http-response", |
| 349 | }; |
| 350 | |
| 351 | |
| 352 | #if defined(DEBUG_SPOE) || defined(DEBUG_FULL) |
| 353 | |
| 354 | static const char *spoe_ctx_state_str[SPOE_CTX_ST_ERROR+1] = { |
| 355 | [SPOE_CTX_ST_NONE] = "NONE", |
| 356 | [SPOE_CTX_ST_READY] = "READY", |
| 357 | [SPOE_CTX_ST_SENDING_MSGS] = "SENDING_MSGS", |
| 358 | [SPOE_CTX_ST_WAITING_ACK] = "WAITING_ACK", |
| 359 | [SPOE_CTX_ST_DONE] = "DONE", |
| 360 | [SPOE_CTX_ST_ERROR] = "ERROR", |
| 361 | }; |
| 362 | |
| 363 | static const char *spoe_appctx_state_str[SPOE_APPCTX_ST_END+1] = { |
| 364 | [SPOE_APPCTX_ST_CONNECT] = "CONNECT", |
| 365 | [SPOE_APPCTX_ST_CONNECTING] = "CONNECTING", |
| 366 | [SPOE_APPCTX_ST_PROCESSING] = "PROCESSING", |
| 367 | [SPOE_APPCTX_ST_DISCONNECT] = "DISCONNECT", |
| 368 | [SPOE_APPCTX_ST_DISCONNECTING] = "DISCONNECTING", |
| 369 | [SPOE_APPCTX_ST_EXIT] = "EXIT", |
| 370 | [SPOE_APPCTX_ST_END] = "END", |
| 371 | }; |
| 372 | |
| 373 | #endif |
| 374 | /******************************************************************** |
| 375 | * Functions that encode/decode SPOE frames |
| 376 | ********************************************************************/ |
| 377 | /* Frame Types sent by HAProxy and by agents */ |
| 378 | enum spoe_frame_type { |
| 379 | /* Frames sent by HAProxy */ |
| 380 | SPOE_FRM_T_HAPROXY_HELLO = 1, |
| 381 | SPOE_FRM_T_HAPROXY_DISCON, |
| 382 | SPOE_FRM_T_HAPROXY_NOTIFY, |
| 383 | |
| 384 | /* Frames sent by the agents */ |
| 385 | SPOE_FRM_T_AGENT_HELLO = 101, |
| 386 | SPOE_FRM_T_AGENT_DISCON, |
| 387 | SPOE_FRM_T_AGENT_ACK |
| 388 | }; |
| 389 | |
| 390 | /* All supported data types */ |
| 391 | enum spoe_data_type { |
| 392 | SPOE_DATA_T_NULL = 0, |
| 393 | SPOE_DATA_T_BOOL, |
| 394 | SPOE_DATA_T_INT32, |
| 395 | SPOE_DATA_T_UINT32, |
| 396 | SPOE_DATA_T_INT64, |
| 397 | SPOE_DATA_T_UINT64, |
| 398 | SPOE_DATA_T_IPV4, |
| 399 | SPOE_DATA_T_IPV6, |
| 400 | SPOE_DATA_T_STR, |
| 401 | SPOE_DATA_T_BIN, |
| 402 | SPOE_DATA_TYPES |
| 403 | }; |
| 404 | |
| 405 | /* Masks to get data type or flags value */ |
| 406 | #define SPOE_DATA_T_MASK 0x0F |
| 407 | #define SPOE_DATA_FL_MASK 0xF0 |
| 408 | |
| 409 | /* Flags to set Boolean values */ |
| 410 | #define SPOE_DATA_FL_FALSE 0x00 |
| 411 | #define SPOE_DATA_FL_TRUE 0x10 |
| 412 | |
| 413 | /* Helper to get static string length, excluding the terminating null byte */ |
| 414 | #define SLEN(str) (sizeof(str)-1) |
| 415 | |
| 416 | /* Predefined key used in HELLO/DISCONNECT frames */ |
| 417 | #define SUPPORTED_VERSIONS_KEY "supported-versions" |
| 418 | #define VERSION_KEY "version" |
| 419 | #define MAX_FRAME_SIZE_KEY "max-frame-size" |
| 420 | #define CAPABILITIES_KEY "capabilities" |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 421 | #define HEALTHCHECK_KEY "healthcheck" |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 422 | #define STATUS_CODE_KEY "status-code" |
| 423 | #define MSG_KEY "message" |
| 424 | |
| 425 | struct spoe_version { |
| 426 | char *str; |
| 427 | int min; |
| 428 | int max; |
| 429 | }; |
| 430 | |
| 431 | /* All supported versions */ |
| 432 | static struct spoe_version supported_versions[] = { |
| 433 | {"1.0", 1000, 1000}, |
| 434 | {NULL, 0, 0} |
| 435 | }; |
| 436 | |
| 437 | /* Comma-separated list of supported versions */ |
| 438 | #define SUPPORTED_VERSIONS_VAL "1.0" |
| 439 | |
| 440 | /* Comma-separated list of supported capabilities (none for now) */ |
| 441 | #define CAPABILITIES_VAL "" |
| 442 | |
| 443 | static int |
| 444 | decode_spoe_version(const char *str, size_t len) |
| 445 | { |
| 446 | char tmp[len+1], *start, *end; |
| 447 | double d; |
| 448 | int vsn = -1; |
| 449 | |
| 450 | memset(tmp, 0, len+1); |
| 451 | memcpy(tmp, str, len); |
| 452 | |
| 453 | start = tmp; |
| 454 | while (isspace(*start)) |
| 455 | start++; |
| 456 | |
| 457 | d = strtod(start, &end); |
| 458 | if (d == 0 || start == end) |
| 459 | goto out; |
| 460 | |
| 461 | if (*end) { |
| 462 | while (isspace(*end)) |
| 463 | end++; |
| 464 | if (*end) |
| 465 | goto out; |
| 466 | } |
| 467 | vsn = (int)(d * 1000); |
| 468 | out: |
| 469 | return vsn; |
| 470 | } |
| 471 | |
| 472 | /* Encode a variable-length integer. This function never fails and returns the |
| 473 | * number of written bytes. */ |
| 474 | static int |
| 475 | encode_spoe_varint(uint64_t i, char *buf) |
| 476 | { |
| 477 | int idx; |
| 478 | |
| 479 | if (i < 240) { |
| 480 | buf[0] = (unsigned char)i; |
| 481 | return 1; |
| 482 | } |
| 483 | |
| 484 | buf[0] = (unsigned char)i | 240; |
| 485 | i = (i - 240) >> 4; |
| 486 | for (idx = 1; i >= 128; ++idx) { |
| 487 | buf[idx] = (unsigned char)i | 128; |
| 488 | i = (i - 128) >> 7; |
| 489 | } |
| 490 | buf[idx++] = (unsigned char)i; |
| 491 | return idx; |
| 492 | } |
| 493 | |
| 494 | /* Decode a varable-length integer. If the decoding fails, -1 is returned. This |
| 495 | * happens when the buffer's end in reached. On success, the number of read |
| 496 | * bytes is returned. */ |
| 497 | static int |
| 498 | decode_spoe_varint(const char *buf, const char *end, uint64_t *i) |
| 499 | { |
| 500 | unsigned char *msg = (unsigned char *)buf; |
| 501 | int idx = 0; |
| 502 | |
| 503 | if (msg > (unsigned char *)end) |
| 504 | return -1; |
| 505 | |
| 506 | if (msg[0] < 240) { |
| 507 | *i = msg[0]; |
| 508 | return 1; |
| 509 | } |
| 510 | *i = msg[0]; |
| 511 | do { |
| 512 | ++idx; |
| 513 | if (msg+idx > (unsigned char *)end) |
| 514 | return -1; |
| 515 | *i += (uint64_t)msg[idx] << (4 + 7 * (idx-1)); |
| 516 | } while (msg[idx] >= 128); |
| 517 | return (idx + 1); |
| 518 | } |
| 519 | |
| 520 | /* Encode a string. The string will be prefix by its length, encoded as a |
| 521 | * variable-length integer. This function never fails and returns the number of |
| 522 | * written bytes. */ |
| 523 | static int |
| 524 | encode_spoe_string(const char *str, size_t len, char *dst) |
| 525 | { |
| 526 | int idx = 0; |
| 527 | |
| 528 | if (!len) { |
| 529 | dst[0] = 0; |
| 530 | return 1; |
| 531 | } |
| 532 | |
| 533 | idx += encode_spoe_varint(len, dst); |
| 534 | memcpy(dst+idx, str, len); |
| 535 | return (idx + len); |
| 536 | } |
| 537 | |
| 538 | /* Decode a string. Its length is decoded first as a variable-length integer. If |
| 539 | * it succeeds, and if the string length is valid, the begin of the string is |
| 540 | * saved in <*str>, its length is saved in <*len> and the total numbre of bytes |
| 541 | * read is returned. If an error occurred, -1 is returned and <*str> remains |
| 542 | * NULL. */ |
| 543 | static int |
| 544 | decode_spoe_string(char *buf, char *end, char **str, uint64_t *len) |
| 545 | { |
| 546 | int i, idx = 0; |
| 547 | |
| 548 | *str = NULL; |
| 549 | *len = 0; |
| 550 | |
| 551 | if ((i = decode_spoe_varint(buf, end, len)) == -1) |
| 552 | goto error; |
| 553 | idx += i; |
| 554 | if (buf + idx + *len > end) |
| 555 | goto error; |
| 556 | |
| 557 | *str = buf+idx; |
| 558 | return (idx + *len); |
| 559 | |
| 560 | error: |
| 561 | return -1; |
| 562 | } |
| 563 | |
| 564 | /* Skip a typed data. If an error occurred, -1 is returned, otherwise the number |
| 565 | * of bytes read is returned. A types data is composed of a type (1 byte) and |
| 566 | * corresponding data: |
| 567 | * - boolean: non additional data (0 bytes) |
| 568 | * - integers: a variable-length integer (see decode_spoe_varint) |
| 569 | * - ipv4: 4 bytes |
| 570 | * - ipv6: 16 bytes |
| 571 | * - binary and string: a buffer prefixed by its size, a variable-length |
| 572 | * integer (see decode_spoe_string) */ |
| 573 | static int |
| 574 | skip_spoe_data(char *frame, char *end) |
| 575 | { |
| 576 | uint64_t sz = 0; |
| 577 | int i, idx = 0; |
| 578 | |
| 579 | if (frame > end) |
| 580 | return -1; |
| 581 | |
| 582 | switch (frame[idx++] & SPOE_DATA_T_MASK) { |
| 583 | case SPOE_DATA_T_BOOL: |
| 584 | break; |
| 585 | case SPOE_DATA_T_INT32: |
| 586 | case SPOE_DATA_T_INT64: |
| 587 | case SPOE_DATA_T_UINT32: |
| 588 | case SPOE_DATA_T_UINT64: |
| 589 | if ((i = decode_spoe_varint(frame+idx, end, &sz)) == -1) |
| 590 | return -1; |
| 591 | idx += i; |
| 592 | break; |
| 593 | case SPOE_DATA_T_IPV4: |
| 594 | idx += 4; |
| 595 | break; |
| 596 | case SPOE_DATA_T_IPV6: |
| 597 | idx += 16; |
| 598 | break; |
| 599 | case SPOE_DATA_T_STR: |
| 600 | case SPOE_DATA_T_BIN: |
| 601 | if ((i = decode_spoe_varint(frame+idx, end, &sz)) == -1) |
| 602 | return -1; |
| 603 | idx += i + sz; |
| 604 | break; |
| 605 | } |
| 606 | |
| 607 | if (frame+idx > end) |
| 608 | return -1; |
| 609 | return idx; |
| 610 | } |
| 611 | |
| 612 | /* Decode a typed data. If an error occurred, -1 is returned, otherwise the |
| 613 | * number of read bytes is returned. See skip_spoe_data for details. */ |
| 614 | static int |
| 615 | decode_spoe_data(char *frame, char *end, struct sample *smp) |
| 616 | { |
| 617 | uint64_t sz = 0; |
| 618 | int type, i, idx = 0; |
| 619 | |
| 620 | if (frame > end) |
| 621 | return -1; |
| 622 | |
| 623 | type = frame[idx++]; |
| 624 | switch (type & SPOE_DATA_T_MASK) { |
| 625 | case SPOE_DATA_T_BOOL: |
| 626 | smp->data.u.sint = ((type & SPOE_DATA_FL_TRUE) == SPOE_DATA_FL_TRUE); |
| 627 | smp->data.type = SMP_T_BOOL; |
| 628 | break; |
| 629 | case SPOE_DATA_T_INT32: |
| 630 | case SPOE_DATA_T_INT64: |
| 631 | case SPOE_DATA_T_UINT32: |
| 632 | case SPOE_DATA_T_UINT64: |
| 633 | if ((i = decode_spoe_varint(frame+idx, end, (uint64_t *)&smp->data.u.sint)) == -1) |
| 634 | return -1; |
| 635 | idx += i; |
| 636 | smp->data.type = SMP_T_SINT; |
| 637 | break; |
| 638 | case SPOE_DATA_T_IPV4: |
| 639 | if (frame+idx+4 > end) |
| 640 | return -1; |
| 641 | memcpy(&smp->data.u.ipv4, frame+idx, 4); |
| 642 | smp->data.type = SMP_T_IPV4; |
| 643 | idx += 4; |
| 644 | break; |
| 645 | case SPOE_DATA_T_IPV6: |
| 646 | if (frame+idx+16 > end) |
| 647 | return -1; |
| 648 | memcpy(&smp->data.u.ipv6, frame+idx, 16); |
| 649 | smp->data.type = SMP_T_IPV6; |
| 650 | idx += 16; |
| 651 | break; |
| 652 | case SPOE_DATA_T_STR: |
| 653 | if ((i = decode_spoe_varint(frame+idx, end, &sz)) == -1) |
| 654 | return -1; |
| 655 | idx += i; |
| 656 | if (frame+idx+sz > end) |
| 657 | return -1; |
| 658 | smp->data.u.str.str = frame+idx; |
| 659 | smp->data.u.str.len = sz; |
| 660 | smp->data.type = SMP_T_STR; |
| 661 | idx += sz; |
| 662 | break; |
| 663 | case SPOE_DATA_T_BIN: |
| 664 | if ((i = decode_spoe_varint(frame+idx, end, &sz)) == -1) |
| 665 | return -1; |
| 666 | idx += i; |
| 667 | if (frame+idx+sz > end) |
| 668 | return -1; |
| 669 | smp->data.u.str.str = frame+idx; |
| 670 | smp->data.u.str.len = sz; |
| 671 | smp->data.type = SMP_T_BIN; |
| 672 | idx += sz; |
| 673 | break; |
| 674 | } |
| 675 | |
| 676 | if (frame+idx > end) |
| 677 | return -1; |
| 678 | return idx; |
| 679 | } |
| 680 | |
| 681 | /* Skip an action in a frame received from an agent. If an error occurred, -1 is |
| 682 | * returned, otherwise the number of read bytes is returned. An action is |
| 683 | * composed of the action type followed by a typed data. */ |
| 684 | static int |
| 685 | skip_spoe_action(char *frame, char *end) |
| 686 | { |
| 687 | int n, i, idx = 0; |
| 688 | |
| 689 | if (frame+2 > end) |
| 690 | return -1; |
| 691 | |
| 692 | idx++; /* Skip the action type */ |
| 693 | n = frame[idx++]; |
| 694 | while (n-- > 0) { |
| 695 | if ((i = skip_spoe_data(frame+idx, end)) == -1) |
| 696 | return -1; |
| 697 | idx += i; |
| 698 | } |
| 699 | |
| 700 | if (frame+idx > end) |
| 701 | return -1; |
| 702 | return idx; |
| 703 | } |
| 704 | |
| 705 | /* Encode HELLO frame sent by HAProxy to an agent. It returns the frame size on |
| 706 | * success, 0 if the frame can be ignored and -1 if an error occurred. */ |
| 707 | static int |
| 708 | prepare_spoe_hahello_frame(struct appctx *appctx, char *frame, size_t size) |
| 709 | { |
| 710 | int idx = 0; |
| 711 | size_t max = (7 /* TYPE + METADATA */ |
| 712 | + 1 + SLEN(SUPPORTED_VERSIONS_KEY) + 1 + 1 + SLEN(SUPPORTED_VERSIONS_VAL) |
| 713 | + 1 + SLEN(MAX_FRAME_SIZE_KEY) + 1 + 4 |
| 714 | + 1 + SLEN(CAPABILITIES_KEY) + 1 + 1 + SLEN(CAPABILITIES_VAL)); |
| 715 | |
| 716 | if (size < max) |
| 717 | return -1; |
| 718 | |
| 719 | /* Frame type */ |
| 720 | frame[idx++] = SPOE_FRM_T_HAPROXY_HELLO; |
| 721 | |
| 722 | /* No flags for now */ |
| 723 | memset(frame+idx, 0, 4); |
| 724 | idx += 4; |
| 725 | |
| 726 | /* No stream-id and frame-id for HELLO frames */ |
| 727 | frame[idx++] = 0; |
| 728 | frame[idx++] = 0; |
| 729 | |
| 730 | /* There are 3 mandatory items: "supported-versions", "max-frame-size" |
| 731 | * and "capabilities" */ |
| 732 | |
| 733 | /* "supported-versions" K/V item */ |
| 734 | idx += encode_spoe_string(SUPPORTED_VERSIONS_KEY, SLEN(SUPPORTED_VERSIONS_KEY), frame+idx); |
| 735 | frame[idx++] = SPOE_DATA_T_STR; |
| 736 | idx += encode_spoe_string(SUPPORTED_VERSIONS_VAL, SLEN(SUPPORTED_VERSIONS_VAL), frame+idx); |
| 737 | |
| 738 | /* "max-fram-size" K/V item */ |
| 739 | idx += encode_spoe_string(MAX_FRAME_SIZE_KEY, SLEN(MAX_FRAME_SIZE_KEY), frame+idx); |
| 740 | frame[idx++] = SPOE_DATA_T_UINT32; |
| 741 | idx += encode_spoe_varint(APPCTX_SPOE(appctx).max_frame_size, frame+idx); |
| 742 | |
| 743 | /* "capabilities" K/V item */ |
| 744 | idx += encode_spoe_string(CAPABILITIES_KEY, SLEN(CAPABILITIES_KEY), frame+idx); |
| 745 | frame[idx++] = SPOE_DATA_T_STR; |
| 746 | idx += encode_spoe_string(CAPABILITIES_VAL, SLEN(CAPABILITIES_VAL), frame+idx); |
| 747 | |
| 748 | return idx; |
| 749 | } |
| 750 | |
| 751 | /* Encode DISCONNECT frame sent by HAProxy to an agent. It returns the frame |
| 752 | * size on success, 0 if the frame can be ignored and -1 if an error |
| 753 | * occurred. */ |
| 754 | static int |
| 755 | prepare_spoe_hadiscon_frame(struct appctx *appctx, char *frame, size_t size) |
| 756 | { |
| 757 | const char *reason; |
| 758 | int rlen, idx = 0; |
| 759 | size_t max = (7 /* TYPE + METADATA */ |
| 760 | + 1 + SLEN(STATUS_CODE_KEY) + 1 + 2 |
| 761 | + 1 + SLEN(MSG_KEY) + 1 + 2 + 255); |
| 762 | |
| 763 | if (size < max) |
| 764 | return -1; |
| 765 | |
| 766 | /* Get the message corresponding to the status code */ |
| 767 | if (spoe_status_code >= SPOE_FRM_ERRS) |
| 768 | spoe_status_code = SPOE_FRM_ERR_UNKNOWN; |
| 769 | reason = spoe_frm_err_reasons[spoe_status_code]; |
| 770 | rlen = strlen(reason); |
| 771 | |
| 772 | /* Frame type */ |
| 773 | frame[idx++] = SPOE_FRM_T_HAPROXY_DISCON; |
| 774 | |
| 775 | /* No flags for now */ |
| 776 | memset(frame+idx, 0, 4); |
| 777 | idx += 4; |
| 778 | |
| 779 | /* No stream-id and frame-id for DISCONNECT frames */ |
| 780 | frame[idx++] = 0; |
| 781 | frame[idx++] = 0; |
| 782 | |
| 783 | /* There are 2 mandatory items: "status-code" and "message" */ |
| 784 | |
| 785 | /* "status-code" K/V item */ |
| 786 | idx += encode_spoe_string(STATUS_CODE_KEY, SLEN(STATUS_CODE_KEY), frame+idx); |
| 787 | frame[idx++] = SPOE_DATA_T_UINT32; |
| 788 | idx += encode_spoe_varint(spoe_status_code, frame+idx); |
| 789 | |
| 790 | /* "message" K/V item */ |
| 791 | idx += encode_spoe_string(MSG_KEY, SLEN(MSG_KEY), frame+idx); |
| 792 | frame[idx++] = SPOE_DATA_T_STR; |
| 793 | idx += encode_spoe_string(reason, rlen, frame+idx); |
| 794 | |
| 795 | return idx; |
| 796 | } |
| 797 | |
| 798 | /* Encode NOTIFY frame sent by HAProxy to an agent. It returns the frame size on |
| 799 | * success, 0 if the frame can be ignored and -1 if an error occurred. */ |
| 800 | static int |
| 801 | prepare_spoe_hanotify_frame(struct appctx *appctx, char *frame, size_t size) |
| 802 | { |
| 803 | struct spoe_context *ctx = APPCTX_SPOE(appctx).ctx; |
| 804 | int idx = 0; |
| 805 | |
| 806 | if (size < APPCTX_SPOE(appctx).max_frame_size) |
| 807 | return -1; |
| 808 | |
| 809 | frame[idx++] = SPOE_FRM_T_HAPROXY_NOTIFY; |
| 810 | |
| 811 | /* No flags for now */ |
| 812 | memset(frame+idx, 0, 4); |
| 813 | idx += 4; |
| 814 | |
| 815 | /* Set stream-id and frame-id */ |
| 816 | idx += encode_spoe_varint(ctx->stream_id, frame+idx); |
| 817 | idx += encode_spoe_varint(ctx->frame_id, frame+idx); |
| 818 | |
| 819 | /* Copy encoded messages */ |
| 820 | memcpy(frame+idx, ctx->buffer->p, ctx->buffer->i); |
| 821 | idx += ctx->buffer->i; |
| 822 | |
| 823 | return idx; |
| 824 | } |
| 825 | |
| 826 | /* Decode HELLO frame sent by an agent. It returns the number of by read bytes |
| 827 | * on success, 0 if the frame can be ignored and -1 if an error occurred. */ |
| 828 | static int |
| 829 | handle_spoe_agenthello_frame(struct appctx *appctx, char *frame, size_t size) |
| 830 | { |
| 831 | int vsn, max_frame_size; |
| 832 | int i, idx = 0; |
| 833 | size_t min_size = (7 /* TYPE + METADATA */ |
| 834 | + 1 + SLEN(VERSION_KEY) + 1 + 1 + 3 |
| 835 | + 1 + SLEN(MAX_FRAME_SIZE_KEY) + 1 + 1 |
| 836 | + 1 + SLEN(CAPABILITIES_KEY) + 1 + 1 + 0); |
| 837 | |
| 838 | /* Check frame type */ |
| 839 | if (frame[idx++] != SPOE_FRM_T_AGENT_HELLO) |
| 840 | return 0; |
| 841 | |
| 842 | if (size < min_size) { |
| 843 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 844 | return -1; |
| 845 | } |
| 846 | |
| 847 | /* Skip flags: fragmentation is not supported for now */ |
| 848 | idx += 4; |
| 849 | |
| 850 | /* stream-id and frame-id must be cleared */ |
| 851 | if (frame[idx] != 0 || frame[idx+1] != 0) { |
| 852 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 853 | return -1; |
| 854 | } |
| 855 | idx += 2; |
| 856 | |
| 857 | /* There are 3 mandatory items: "version", "max-frame-size" and |
| 858 | * "capabilities" */ |
| 859 | |
| 860 | /* Loop on K/V items */ |
| 861 | vsn = max_frame_size = 0; |
| 862 | while (idx < size) { |
| 863 | char *str; |
| 864 | uint64_t sz; |
| 865 | |
| 866 | /* Decode the item key */ |
| 867 | idx += decode_spoe_string(frame+idx, frame+size, &str, &sz); |
| 868 | if (str == NULL) { |
| 869 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 870 | return -1; |
| 871 | } |
| 872 | /* Check "version" K/V item */ |
| 873 | if (!memcmp(str, VERSION_KEY, sz)) { |
| 874 | /* The value must be a string */ |
| 875 | if ((frame[idx++] & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR) { |
| 876 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 877 | return -1; |
| 878 | } |
| 879 | idx += decode_spoe_string(frame+idx, frame+size, &str, &sz); |
| 880 | if (str == NULL) { |
| 881 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 882 | return -1; |
| 883 | } |
| 884 | |
| 885 | vsn = decode_spoe_version(str, sz); |
| 886 | if (vsn == -1) { |
| 887 | spoe_status_code = SPOE_FRM_ERR_BAD_VSN; |
| 888 | return -1; |
| 889 | } |
| 890 | for (i = 0; supported_versions[i].str != NULL; ++i) { |
| 891 | if (vsn >= supported_versions[i].min && |
| 892 | vsn <= supported_versions[i].max) |
| 893 | break; |
| 894 | } |
| 895 | if (supported_versions[i].str == NULL) { |
| 896 | spoe_status_code = SPOE_FRM_ERR_BAD_VSN; |
| 897 | return -1; |
| 898 | } |
| 899 | } |
| 900 | /* Check "max-frame-size" K/V item */ |
| 901 | else if (!memcmp(str, MAX_FRAME_SIZE_KEY, sz)) { |
| 902 | int type; |
| 903 | |
| 904 | /* The value must be integer */ |
| 905 | type = frame[idx++]; |
| 906 | if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT32 && |
| 907 | (type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT64 && |
| 908 | (type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT32 && |
| 909 | (type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT64) { |
| 910 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 911 | return -1; |
| 912 | } |
| 913 | if ((i = decode_spoe_varint(frame+idx, frame+size, &sz)) == -1) { |
| 914 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 915 | return -1; |
| 916 | } |
| 917 | idx += i; |
| 918 | if (sz < MIN_FRAME_SIZE || sz > APPCTX_SPOE(appctx).max_frame_size) { |
| 919 | spoe_status_code = SPOE_FRM_ERR_BAD_FRAME_SIZE; |
| 920 | return -1; |
| 921 | } |
| 922 | max_frame_size = sz; |
| 923 | } |
| 924 | /* Skip "capabilities" K/V item for now */ |
| 925 | else { |
| 926 | /* Silently ignore unknown item */ |
| 927 | if ((i = skip_spoe_data(frame+idx, frame+size)) == -1) { |
| 928 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 929 | return -1; |
| 930 | } |
| 931 | idx += i; |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | /* Final checks */ |
| 936 | if (!vsn) { |
| 937 | spoe_status_code = SPOE_FRM_ERR_NO_VSN; |
| 938 | return -1; |
| 939 | } |
| 940 | if (!max_frame_size) { |
| 941 | spoe_status_code = SPOE_FRM_ERR_NO_FRAME_SIZE; |
| 942 | return -1; |
| 943 | } |
| 944 | |
| 945 | APPCTX_SPOE(appctx).version = (unsigned int)vsn; |
| 946 | APPCTX_SPOE(appctx).max_frame_size = (unsigned int)max_frame_size; |
| 947 | return idx; |
| 948 | } |
| 949 | |
| 950 | /* Decode DISCONNECT frame sent by an agent. It returns the number of by read |
| 951 | * bytes on success, 0 if the frame can be ignored and -1 if an error |
| 952 | * occurred. */ |
| 953 | static int |
| 954 | handle_spoe_agentdiscon_frame(struct appctx *appctx, char *frame, size_t size) |
| 955 | { |
| 956 | int i, idx = 0; |
| 957 | size_t min_size = (7 /* TYPE + METADATA */ |
| 958 | + 1 + SLEN(STATUS_CODE_KEY) + 1 + 1 |
| 959 | + 1 + SLEN(MSG_KEY) + 1 + 1); |
| 960 | |
| 961 | /* Check frame type */ |
| 962 | if (frame[idx++] != SPOE_FRM_T_AGENT_DISCON) |
| 963 | return 0; |
| 964 | |
| 965 | if (size < min_size) { |
| 966 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 967 | return -1; |
| 968 | } |
| 969 | |
| 970 | /* Skip flags: fragmentation is not supported for now */ |
| 971 | idx += 4; |
| 972 | |
| 973 | /* stream-id and frame-id must be cleared */ |
| 974 | if (frame[idx] != 0 || frame[idx+1] != 0) { |
| 975 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 976 | return -1; |
| 977 | } |
| 978 | idx += 2; |
| 979 | |
| 980 | /* There are 2 mandatory items: "status-code" and "message" */ |
| 981 | |
| 982 | /* Loop on K/V items */ |
| 983 | while (idx < size) { |
| 984 | char *str; |
| 985 | uint64_t sz; |
| 986 | |
| 987 | /* Decode the item key */ |
| 988 | idx += decode_spoe_string(frame+idx, frame+size, &str, &sz); |
| 989 | if (str == NULL) { |
| 990 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 991 | return -1; |
| 992 | } |
| 993 | |
| 994 | /* Check "status-code" K/V item */ |
| 995 | if (!memcmp(str, STATUS_CODE_KEY, sz)) { |
| 996 | int type; |
| 997 | |
| 998 | /* The value must be an integer */ |
| 999 | type = frame[idx++]; |
| 1000 | if ((type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT32 && |
| 1001 | (type & SPOE_DATA_T_MASK) != SPOE_DATA_T_INT64 && |
| 1002 | (type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT32 && |
| 1003 | (type & SPOE_DATA_T_MASK) != SPOE_DATA_T_UINT64) { |
| 1004 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 1005 | return -1; |
| 1006 | } |
| 1007 | if ((i = decode_spoe_varint(frame+idx, frame+size, &sz)) == -1) { |
| 1008 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 1009 | return -1; |
| 1010 | } |
| 1011 | idx += i; |
| 1012 | spoe_status_code = sz; |
| 1013 | } |
| 1014 | |
| 1015 | /* Check "message" K/V item */ |
| 1016 | else if (sz && !memcmp(str, MSG_KEY, sz)) { |
| 1017 | /* The value must be a string */ |
| 1018 | if ((frame[idx++] & SPOE_DATA_T_MASK) != SPOE_DATA_T_STR) { |
| 1019 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 1020 | return -1; |
| 1021 | } |
| 1022 | idx += decode_spoe_string(frame+idx, frame+size, &str, &sz); |
| 1023 | if (str == NULL || sz > 255) { |
| 1024 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 1025 | return -1; |
| 1026 | } |
| 1027 | memcpy(spoe_reason, str, sz); |
| 1028 | spoe_reason[sz] = 0; |
| 1029 | } |
| 1030 | else { |
| 1031 | /* Silently ignore unknown item */ |
| 1032 | if ((i = skip_spoe_data(frame+idx, frame+size)) == -1) { |
| 1033 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 1034 | return -1; |
| 1035 | } |
| 1036 | idx += i; |
| 1037 | } |
| 1038 | } |
| 1039 | |
| 1040 | return idx; |
| 1041 | } |
| 1042 | |
| 1043 | |
| 1044 | /* Decode ACK frame sent by an agent. It returns the number of by read bytes on |
| 1045 | * success, 0 if the frame can be ignored and -1 if an error occurred. */ |
| 1046 | static int |
| 1047 | handle_spoe_agentack_frame(struct appctx *appctx, char *frame, size_t size) |
| 1048 | { |
| 1049 | struct spoe_context *ctx = APPCTX_SPOE(appctx).ctx; |
| 1050 | uint64_t stream_id, frame_id; |
| 1051 | int idx = 0; |
| 1052 | size_t min_size = (7 /* TYPE + METADATA */); |
| 1053 | |
| 1054 | /* Check frame type */ |
| 1055 | if (frame[idx++] != SPOE_FRM_T_AGENT_ACK) |
| 1056 | return 0; |
| 1057 | |
| 1058 | if (size < min_size) { |
| 1059 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 1060 | return -1; |
| 1061 | } |
| 1062 | |
| 1063 | /* Skip flags: fragmentation is not supported for now */ |
| 1064 | idx += 4; |
| 1065 | |
| 1066 | /* Get the stream-id and the frame-id */ |
| 1067 | idx += decode_spoe_varint(frame+idx, frame+size, &stream_id); |
| 1068 | idx += decode_spoe_varint(frame+idx, frame+size, &frame_id); |
| 1069 | |
| 1070 | /* Check stream-id and frame-id */ |
| 1071 | if (ctx->stream_id != (unsigned int)stream_id || |
| 1072 | ctx->frame_id != (unsigned int)frame_id) |
| 1073 | return 0; |
| 1074 | |
| 1075 | /* Copy encoded actions */ |
| 1076 | b_reset(ctx->buffer); |
| 1077 | memcpy(ctx->buffer->p, frame+idx, size-idx); |
| 1078 | ctx->buffer->i = size-idx; |
| 1079 | |
| 1080 | return idx; |
| 1081 | } |
| 1082 | |
Christopher Faulet | ba7bc16 | 2016-11-07 21:07:38 +0100 | [diff] [blame] | 1083 | /* This function is used in cfgparse.c and declared in proto/checks.h. It |
| 1084 | * prepare the request to send to agents during a healthcheck. It returns 0 on |
| 1085 | * success and -1 if an error occurred. */ |
| 1086 | int |
| 1087 | prepare_spoe_healthcheck_request(char **req, int *len) |
| 1088 | { |
| 1089 | struct appctx a; |
| 1090 | char *frame, buf[global.tune.bufsize]; |
| 1091 | unsigned int framesz; |
| 1092 | int idx; |
| 1093 | |
| 1094 | memset(&a, 0, sizeof(a)); |
| 1095 | memset(buf, 0, sizeof(buf)); |
| 1096 | APPCTX_SPOE(&a).max_frame_size = global.tune.bufsize; |
| 1097 | |
| 1098 | frame = buf+4; |
| 1099 | idx = prepare_spoe_hahello_frame(&a, frame, global.tune.bufsize-4); |
| 1100 | if (idx <= 0) |
| 1101 | return -1; |
| 1102 | if (idx + SLEN(HEALTHCHECK_KEY) + 1 > global.tune.bufsize-4) |
| 1103 | return -1; |
| 1104 | |
| 1105 | /* "healthcheck" K/V item */ |
| 1106 | idx += encode_spoe_string(HEALTHCHECK_KEY, SLEN(HEALTHCHECK_KEY), frame+idx); |
| 1107 | frame[idx++] = (SPOE_DATA_T_BOOL | SPOE_DATA_FL_TRUE); |
| 1108 | |
| 1109 | framesz = htonl(idx); |
| 1110 | memcpy(buf, (char *)&framesz, 4); |
| 1111 | |
| 1112 | if ((*req = malloc(idx+4)) == NULL) |
| 1113 | return -1; |
| 1114 | memcpy(*req, buf, idx+4); |
| 1115 | *len = idx+4; |
| 1116 | return 0; |
| 1117 | } |
| 1118 | |
| 1119 | /* This function is used in checks.c and declared in proto/checks.h. It decode |
| 1120 | * the response received from an agent during a healthcheck. It returns 0 on |
| 1121 | * success and -1 if an error occurred. */ |
| 1122 | int |
| 1123 | handle_spoe_healthcheck_response(char *frame, size_t size, char *err, int errlen) |
| 1124 | { |
| 1125 | struct appctx a; |
| 1126 | int r; |
| 1127 | |
| 1128 | memset(&a, 0, sizeof(a)); |
| 1129 | APPCTX_SPOE(&a).max_frame_size = global.tune.bufsize; |
| 1130 | |
| 1131 | if (handle_spoe_agentdiscon_frame(&a, frame, size) != 0) |
| 1132 | goto error; |
| 1133 | if ((r = handle_spoe_agenthello_frame(&a, frame, size)) <= 0) { |
| 1134 | if (r == 0) |
| 1135 | spoe_status_code = SPOE_FRM_ERR_INVALID; |
| 1136 | goto error; |
| 1137 | } |
| 1138 | |
| 1139 | return 0; |
| 1140 | |
| 1141 | error: |
| 1142 | if (spoe_status_code >= SPOE_FRM_ERRS) |
| 1143 | spoe_status_code = SPOE_FRM_ERR_UNKNOWN; |
| 1144 | strncpy(err, spoe_frm_err_reasons[spoe_status_code], errlen); |
| 1145 | return -1; |
| 1146 | } |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 1147 | |
| 1148 | /******************************************************************** |
| 1149 | * Functions that manage the SPOE applet |
| 1150 | ********************************************************************/ |
| 1151 | /* Callback function that catches applet timeouts. If a timeout occurred, we set |
| 1152 | * <appctx->st1> flag and the SPOE applet is woken up. */ |
| 1153 | static struct task * |
| 1154 | process_spoe_applet(struct task * task) |
| 1155 | { |
| 1156 | struct appctx *appctx = task->context; |
| 1157 | |
| 1158 | appctx->st1 = SPOE_APPCTX_ERR_NONE; |
| 1159 | if (tick_is_expired(task->expire, now_ms)) { |
| 1160 | task->expire = TICK_ETERNITY; |
| 1161 | appctx->st1 = SPOE_APPCTX_ERR_TOUT; |
| 1162 | } |
| 1163 | si_applet_want_get(appctx->owner); |
| 1164 | appctx_wakeup(appctx); |
| 1165 | return task; |
| 1166 | } |
| 1167 | |
| 1168 | /* Remove a SPOE applet from the agent cache */ |
| 1169 | static void |
| 1170 | remove_spoe_applet_from_cache(struct appctx *appctx) |
| 1171 | { |
| 1172 | struct appctx *a, *back; |
| 1173 | struct spoe_agent *agent = APPCTX_SPOE(appctx).agent; |
| 1174 | |
| 1175 | if (LIST_ISEMPTY(&agent->cache)) |
| 1176 | return; |
| 1177 | |
| 1178 | list_for_each_entry_safe(a, back, &agent->cache, ctx.spoe.list) { |
| 1179 | if (a == appctx) { |
| 1180 | LIST_DEL(&APPCTX_SPOE(appctx).list); |
| 1181 | break; |
| 1182 | } |
| 1183 | } |
| 1184 | } |
| 1185 | |
| 1186 | |
| 1187 | /* Callback function that releases a SPOE applet. This happens when the |
| 1188 | * connection with the agent is closed. */ |
| 1189 | static void |
| 1190 | release_spoe_applet(struct appctx *appctx) |
| 1191 | { |
| 1192 | struct stream_interface *si = appctx->owner; |
| 1193 | struct spoe_agent *agent = APPCTX_SPOE(appctx).agent; |
| 1194 | struct spoe_context *ctx = APPCTX_SPOE(appctx).ctx; |
| 1195 | |
| 1196 | if (appctx->st0 == SPOE_APPCTX_ST_CONNECT || |
| 1197 | appctx->st0 == SPOE_APPCTX_ST_CONNECTING) |
| 1198 | on_new_spoe_appctx_failure(agent); |
| 1199 | |
| 1200 | if (appctx->st0 != SPOE_APPCTX_ST_END) { |
| 1201 | si_shutw(si); |
| 1202 | si_shutr(si); |
| 1203 | si_ic(si)->flags |= CF_READ_NULL; |
| 1204 | appctx->st0 = SPOE_APPCTX_ST_END; |
| 1205 | } |
| 1206 | |
| 1207 | if (ctx != NULL) { |
| 1208 | task_wakeup(ctx->strm->task, TASK_WOKEN_MSG); |
| 1209 | ctx->appctx = NULL; |
| 1210 | } |
| 1211 | |
| 1212 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p\n", |
| 1213 | (int)now.tv_sec, (int)now.tv_usec, agent->id, |
| 1214 | __FUNCTION__, appctx); |
| 1215 | |
| 1216 | /* Release the task attached to the SPOE applet */ |
| 1217 | if (APPCTX_SPOE(appctx).task) { |
| 1218 | task_delete(APPCTX_SPOE(appctx).task); |
| 1219 | task_free(APPCTX_SPOE(appctx).task); |
| 1220 | } |
| 1221 | |
| 1222 | /* And remove it from the agent cache */ |
| 1223 | remove_spoe_applet_from_cache(appctx); |
| 1224 | APPCTX_SPOE(appctx).ctx = NULL; |
| 1225 | } |
| 1226 | |
| 1227 | /* Send a SPOE frame to an agent. It return -2 when an error occurred, -1 when |
| 1228 | * the frame can be ignored, 0 to retry later and 1 on success. The frame is |
| 1229 | * encoded using the callback function <prepare>. */ |
| 1230 | static int |
| 1231 | send_spoe_frame(struct appctx *appctx, |
| 1232 | int (*prepare)(struct appctx *, char *, size_t)) |
| 1233 | { |
| 1234 | struct stream_interface *si = appctx->owner; |
| 1235 | int framesz, ret; |
| 1236 | uint32_t netint; |
| 1237 | |
| 1238 | ret = prepare(appctx, trash.str, APPCTX_SPOE(appctx).max_frame_size); |
| 1239 | if (ret <= 0) |
| 1240 | goto skip_or_error; |
| 1241 | framesz = ret; |
| 1242 | netint = htonl(framesz); |
| 1243 | ret = bi_putblk(si_ic(si), (char *)&netint, sizeof(netint)); |
| 1244 | if (ret > 0) |
| 1245 | ret = bi_putblk(si_ic(si), trash.str, framesz); |
| 1246 | if (ret <= 0) { |
| 1247 | if (ret == -1) |
| 1248 | return -1; |
| 1249 | return -2; |
| 1250 | } |
| 1251 | return 1; |
| 1252 | |
| 1253 | skip_or_error: |
| 1254 | if (!ret) |
| 1255 | return -1; |
| 1256 | return -2; |
| 1257 | } |
| 1258 | |
| 1259 | /* Receive a SPOE frame from an agent. It return -2 when an error occurred, -1 |
| 1260 | * when the frame can be ignored, 0 to retry later and 1 on success. The frame |
| 1261 | * is decoded using the callback function <handle>. */ |
| 1262 | static int |
| 1263 | recv_spoe_frame(struct appctx *appctx, |
| 1264 | int (*handle)(struct appctx *, char *, size_t)) |
| 1265 | { |
| 1266 | struct stream_interface *si = appctx->owner; |
| 1267 | int framesz, ret; |
| 1268 | uint32_t netint; |
| 1269 | |
| 1270 | ret = bo_getblk(si_oc(si), (char *)&netint, sizeof(netint), 0); |
| 1271 | if (ret <= 0) |
| 1272 | goto empty_or_error; |
| 1273 | framesz = ntohl(netint); |
| 1274 | if (framesz > APPCTX_SPOE(appctx).max_frame_size) { |
| 1275 | spoe_status_code = SPOE_FRM_ERR_TOO_BIG; |
| 1276 | return -2; |
| 1277 | } |
| 1278 | |
| 1279 | ret = bo_getblk(si_oc(si), trash.str, framesz, sizeof(netint)); |
| 1280 | if (ret <= 0) |
| 1281 | goto empty_or_error; |
| 1282 | bo_skip(si_oc(si), ret+sizeof(netint)); |
| 1283 | |
| 1284 | /* First check if the received frame is a DISCONNECT frame */ |
| 1285 | ret = handle_spoe_agentdiscon_frame(appctx, trash.str, framesz); |
| 1286 | if (ret != 0) { |
| 1287 | if (ret > 0) { |
| 1288 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p" |
| 1289 | " - disconnected by peer (%d): %s\n", |
| 1290 | (int)now.tv_sec, (int)now.tv_usec, |
| 1291 | ((struct spoe_agent *)APPCTX_SPOE(appctx).agent)->id, |
| 1292 | __FUNCTION__, appctx, spoe_status_code, |
| 1293 | spoe_reason); |
| 1294 | return 2; |
| 1295 | } |
| 1296 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p" |
| 1297 | " - error on frame (%s)\n", |
| 1298 | (int)now.tv_sec, (int)now.tv_usec, |
| 1299 | ((struct spoe_agent *)APPCTX_SPOE(appctx).agent)->id, |
| 1300 | __FUNCTION__, appctx, |
| 1301 | spoe_frm_err_reasons[spoe_status_code]); |
| 1302 | return -2; |
| 1303 | } |
| 1304 | if (handle == NULL) |
| 1305 | goto out; |
| 1306 | |
| 1307 | /* If not, try to decode it */ |
| 1308 | ret = handle(appctx, trash.str, framesz); |
| 1309 | if (ret <= 0) { |
| 1310 | if (!ret) |
| 1311 | return -1; |
| 1312 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p" |
| 1313 | " - error on frame (%s)\n", |
| 1314 | (int)now.tv_sec, (int)now.tv_usec, |
| 1315 | ((struct spoe_agent *)APPCTX_SPOE(appctx).agent)->id, |
| 1316 | __FUNCTION__, appctx, |
| 1317 | spoe_frm_err_reasons[spoe_status_code]); |
| 1318 | return -2; |
| 1319 | } |
| 1320 | out: |
| 1321 | return 1; |
| 1322 | |
| 1323 | empty_or_error: |
| 1324 | if (!ret) |
| 1325 | return 0; |
| 1326 | spoe_status_code = SPOE_FRM_ERR_IO; |
| 1327 | return -2; |
| 1328 | } |
| 1329 | |
| 1330 | /* I/O Handler processing messages exchanged with the agent */ |
| 1331 | static void |
| 1332 | handle_spoe_applet(struct appctx *appctx) |
| 1333 | { |
| 1334 | struct stream_interface *si = appctx->owner; |
| 1335 | struct stream *s = si_strm(si); |
| 1336 | struct spoe_agent *agent = APPCTX_SPOE(appctx).agent; |
| 1337 | struct spoe_context *ctx = APPCTX_SPOE(appctx).ctx; |
| 1338 | int ret; |
| 1339 | |
| 1340 | switchstate: |
| 1341 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p" |
| 1342 | " - appctx-state=%s\n", |
| 1343 | (int)now.tv_sec, (int)now.tv_usec, agent->id, |
| 1344 | __FUNCTION__, appctx, spoe_appctx_state_str[appctx->st0]); |
| 1345 | |
| 1346 | switch (appctx->st0) { |
| 1347 | case SPOE_APPCTX_ST_CONNECT: |
| 1348 | spoe_status_code = SPOE_FRM_ERR_NONE; |
| 1349 | if (si->state <= SI_ST_CON) { |
| 1350 | si_applet_want_put(si); |
| 1351 | task_wakeup(s->task, TASK_WOKEN_MSG); |
| 1352 | break; |
| 1353 | } |
| 1354 | else if (si->state != SI_ST_EST) { |
| 1355 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1356 | on_new_spoe_appctx_failure(agent); |
| 1357 | goto switchstate; |
| 1358 | } |
| 1359 | ret = send_spoe_frame(appctx, &prepare_spoe_hahello_frame); |
| 1360 | if (ret < 0) { |
| 1361 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1362 | on_new_spoe_appctx_failure(agent); |
| 1363 | goto switchstate; |
| 1364 | } |
| 1365 | else if (!ret) |
| 1366 | goto full; |
| 1367 | |
| 1368 | /* Hello frame was sent. Set the hello timeout and |
| 1369 | * wait for the reply. */ |
| 1370 | APPCTX_SPOE(appctx).task->expire = tick_add_ifset(now_ms, agent->timeout.hello); |
| 1371 | appctx->st0 = SPOE_APPCTX_ST_CONNECTING; |
| 1372 | /* fall through */ |
| 1373 | |
| 1374 | case SPOE_APPCTX_ST_CONNECTING: |
| 1375 | if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) { |
| 1376 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1377 | on_new_spoe_appctx_failure(agent); |
| 1378 | goto switchstate; |
| 1379 | } |
| 1380 | if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) { |
| 1381 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p" |
| 1382 | " - Connection timed out\n", |
| 1383 | (int)now.tv_sec, (int)now.tv_usec, |
| 1384 | ((struct spoe_agent *)APPCTX_SPOE(appctx).agent)->id, |
| 1385 | __FUNCTION__, appctx); |
| 1386 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1387 | on_new_spoe_appctx_failure(agent); |
| 1388 | goto switchstate; |
| 1389 | } |
| 1390 | ret = recv_spoe_frame(appctx, &handle_spoe_agenthello_frame); |
| 1391 | if (ret < 0) { |
| 1392 | appctx->st0 = SPOE_APPCTX_ST_DISCONNECT; |
| 1393 | on_new_spoe_appctx_failure(agent); |
| 1394 | goto switchstate; |
| 1395 | } |
| 1396 | if (ret == 2) { |
| 1397 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1398 | on_new_spoe_appctx_failure(agent); |
| 1399 | goto switchstate; |
| 1400 | } |
| 1401 | if (!ret) |
| 1402 | goto out; |
| 1403 | |
| 1404 | /* hello handshake is finished, set the idle timeout, |
| 1405 | * Add the appctx in the agent cache, decrease the |
| 1406 | * number of new applets and wake up waiting streams. */ |
| 1407 | APPCTX_SPOE(appctx).task->expire = tick_add_ifset(now_ms, agent->timeout.idle); |
| 1408 | appctx->st0 = SPOE_APPCTX_ST_PROCESSING; |
| 1409 | on_new_spoe_appctx_success(agent, appctx); |
| 1410 | break; |
| 1411 | |
| 1412 | case SPOE_APPCTX_ST_PROCESSING: |
| 1413 | if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) { |
| 1414 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1415 | goto switchstate; |
| 1416 | } |
| 1417 | if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) { |
| 1418 | spoe_status_code = SPOE_FRM_ERR_TOUT; |
| 1419 | appctx->st0 = SPOE_APPCTX_ST_DISCONNECT; |
| 1420 | appctx->st1 = SPOE_APPCTX_ERR_NONE; |
| 1421 | goto switchstate; |
| 1422 | } |
| 1423 | if (ctx != NULL && ctx->state == SPOE_CTX_ST_SENDING_MSGS) { |
| 1424 | ret = send_spoe_frame(appctx, &prepare_spoe_hanotify_frame); |
| 1425 | if (ret < 0) { |
| 1426 | if (ret == -1) { |
| 1427 | ctx->state = SPOE_CTX_ST_ERROR; |
| 1428 | task_wakeup(ctx->strm->task, TASK_WOKEN_MSG); |
| 1429 | goto skip_notify_frame; |
| 1430 | } |
| 1431 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1432 | goto switchstate; |
| 1433 | } |
| 1434 | else if (!ret) |
| 1435 | goto full; |
| 1436 | ctx->state = SPOE_CTX_ST_WAITING_ACK; |
Christopher Faulet | 03a3449 | 2016-11-19 16:47:56 +0100 | [diff] [blame] | 1437 | APPCTX_SPOE(appctx).task->expire = tick_add_ifset(now_ms, agent->timeout.idle); |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 1438 | } |
| 1439 | |
| 1440 | skip_notify_frame: |
| 1441 | if (ctx != NULL && ctx->state == SPOE_CTX_ST_WAITING_ACK) { |
| 1442 | ret = recv_spoe_frame(appctx, &handle_spoe_agentack_frame); |
| 1443 | if (ret < 0) { |
| 1444 | if (ret == -1) |
| 1445 | goto skip_notify_frame; |
| 1446 | ctx->state = SPOE_CTX_ST_ERROR; |
| 1447 | task_wakeup(ctx->strm->task, TASK_WOKEN_MSG); |
| 1448 | appctx->st0 = SPOE_APPCTX_ST_DISCONNECT; |
| 1449 | goto switchstate; |
| 1450 | } |
| 1451 | if (!ret) |
| 1452 | goto out; |
| 1453 | if (ret == 2) { |
| 1454 | ctx->state = SPOE_CTX_ST_ERROR; |
| 1455 | task_wakeup(ctx->strm->task, TASK_WOKEN_MSG); |
| 1456 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1457 | goto switchstate; |
| 1458 | } |
| 1459 | ctx->state = SPOE_CTX_ST_DONE; |
| 1460 | task_wakeup(ctx->strm->task, TASK_WOKEN_MSG); |
| 1461 | APPCTX_SPOE(appctx).task->expire = tick_add_ifset(now_ms, agent->timeout.idle); |
| 1462 | } |
| 1463 | else { |
| 1464 | if (stopping) { |
| 1465 | appctx->st0 = SPOE_APPCTX_ST_DISCONNECT; |
| 1466 | goto switchstate; |
| 1467 | } |
| 1468 | |
| 1469 | ret = recv_spoe_frame(appctx, NULL); |
| 1470 | if (ret < 0) { |
| 1471 | if (ret == -1) |
| 1472 | goto skip_notify_frame; |
| 1473 | appctx->st0 = SPOE_APPCTX_ST_DISCONNECT; |
| 1474 | goto switchstate; |
| 1475 | } |
| 1476 | if (!ret) |
| 1477 | goto out; |
| 1478 | if (ret == 2) { |
| 1479 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1480 | goto switchstate; |
| 1481 | } |
| 1482 | APPCTX_SPOE(appctx).task->expire = tick_add_ifset(now_ms, agent->timeout.idle); |
| 1483 | } |
| 1484 | break; |
| 1485 | |
| 1486 | case SPOE_APPCTX_ST_DISCONNECT: |
| 1487 | ret = send_spoe_frame(appctx, &prepare_spoe_hadiscon_frame); |
| 1488 | if (ret < 0) { |
| 1489 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1490 | goto switchstate; |
| 1491 | } |
| 1492 | else if (!ret) |
| 1493 | goto full; |
| 1494 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: appctx=%p" |
| 1495 | " - disconnected by HAProxy (%d): %s\n", |
| 1496 | (int)now.tv_sec, (int)now.tv_usec, |
| 1497 | ((struct spoe_agent *)APPCTX_SPOE(appctx).agent)->id, |
| 1498 | __FUNCTION__, appctx, spoe_status_code, |
| 1499 | spoe_frm_err_reasons[spoe_status_code]); |
| 1500 | |
Christopher Faulet | 03a3449 | 2016-11-19 16:47:56 +0100 | [diff] [blame] | 1501 | APPCTX_SPOE(appctx).task->expire = tick_add_ifset(now_ms, agent->timeout.idle); |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 1502 | appctx->st0 = SPOE_APPCTX_ST_DISCONNECTING; |
| 1503 | /* fall through */ |
| 1504 | |
| 1505 | case SPOE_APPCTX_ST_DISCONNECTING: |
| 1506 | if (si->state == SI_ST_CLO || si_opposite(si)->state == SI_ST_CLO) { |
| 1507 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1508 | goto switchstate; |
| 1509 | } |
| 1510 | if (appctx->st1 == SPOE_APPCTX_ERR_TOUT) { |
| 1511 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1512 | goto switchstate; |
| 1513 | } |
| 1514 | ret = recv_spoe_frame(appctx, NULL); |
| 1515 | if (ret < 0 || ret == 2) { |
| 1516 | appctx->st0 = SPOE_APPCTX_ST_EXIT; |
| 1517 | goto switchstate; |
| 1518 | } |
| 1519 | break; |
| 1520 | |
| 1521 | case SPOE_APPCTX_ST_EXIT: |
| 1522 | si_shutw(si); |
| 1523 | si_shutr(si); |
| 1524 | si_ic(si)->flags |= CF_READ_NULL; |
| 1525 | appctx->st0 = SPOE_APPCTX_ST_END; |
| 1526 | APPCTX_SPOE(appctx).task->expire = TICK_ETERNITY; |
| 1527 | /* fall through */ |
| 1528 | |
| 1529 | case SPOE_APPCTX_ST_END: |
| 1530 | break; |
| 1531 | } |
| 1532 | |
| 1533 | out: |
| 1534 | if (APPCTX_SPOE(appctx).task->expire != TICK_ETERNITY) |
| 1535 | task_queue(APPCTX_SPOE(appctx).task); |
| 1536 | si_oc(si)->flags |= CF_READ_DONTWAIT; |
| 1537 | task_wakeup(si_strm(si)->task, TASK_WOKEN_IO); |
| 1538 | return; |
| 1539 | full: |
| 1540 | si_applet_cant_put(si); |
| 1541 | goto out; |
| 1542 | } |
| 1543 | |
| 1544 | struct applet spoe_applet = { |
| 1545 | .obj_type = OBJ_TYPE_APPLET, |
| 1546 | .name = "<SPOE>", /* used for logging */ |
| 1547 | .fct = handle_spoe_applet, |
| 1548 | .release = release_spoe_applet, |
| 1549 | }; |
| 1550 | |
| 1551 | /* Create a SPOE applet. On success, the created applet is returned, else |
| 1552 | * NULL. */ |
| 1553 | static struct appctx * |
| 1554 | create_spoe_appctx(struct spoe_config *conf) |
| 1555 | { |
| 1556 | struct appctx *appctx; |
| 1557 | struct session *sess; |
| 1558 | struct task *task; |
| 1559 | struct stream *strm; |
| 1560 | struct listener *l = LIST_NEXT(&conf->agent_fe.conf.listeners, |
| 1561 | struct listener *, by_fe); |
| 1562 | |
| 1563 | if ((appctx = appctx_new(&spoe_applet)) == NULL) |
| 1564 | goto out_error; |
| 1565 | |
| 1566 | appctx->st0 = SPOE_APPCTX_ST_CONNECT; |
| 1567 | if ((APPCTX_SPOE(appctx).task = task_new()) == NULL) |
| 1568 | goto out_free_appctx; |
| 1569 | APPCTX_SPOE(appctx).task->process = process_spoe_applet; |
| 1570 | APPCTX_SPOE(appctx).task->expire = TICK_ETERNITY; |
| 1571 | APPCTX_SPOE(appctx).task->context = appctx; |
| 1572 | APPCTX_SPOE(appctx).agent = conf->agent; |
| 1573 | APPCTX_SPOE(appctx).ctx = NULL; |
| 1574 | APPCTX_SPOE(appctx).version = 0; |
| 1575 | APPCTX_SPOE(appctx).max_frame_size = global.tune.bufsize; |
| 1576 | task_wakeup(APPCTX_SPOE(appctx).task, TASK_WOKEN_INIT); |
| 1577 | |
| 1578 | sess = session_new(&conf->agent_fe, l, &appctx->obj_type); |
| 1579 | if (!sess) |
| 1580 | goto out_free_spoe; |
| 1581 | |
| 1582 | if ((task = task_new()) == NULL) |
| 1583 | goto out_free_sess; |
| 1584 | |
| 1585 | if ((strm = stream_new(sess, task, &appctx->obj_type)) == NULL) |
| 1586 | goto out_free_task; |
| 1587 | |
| 1588 | strm->target = sess->listener->default_target; |
| 1589 | strm->req.analysers |= sess->listener->analysers; |
| 1590 | stream_set_backend(strm, conf->agent->b.be); |
| 1591 | |
| 1592 | /* applet is waiting for data */ |
| 1593 | si_applet_cant_get(&strm->si[0]); |
| 1594 | appctx_wakeup(appctx); |
| 1595 | |
| 1596 | /* Increase the number of applets waiting the end of the hello |
| 1597 | * handshake. */ |
| 1598 | conf->agent->new_applets++; |
| 1599 | |
| 1600 | strm->do_log = NULL; |
| 1601 | strm->res.flags |= CF_READ_DONTWAIT; |
| 1602 | |
| 1603 | conf->agent_fe.feconn++; |
| 1604 | jobs++; |
| 1605 | totalconn++; |
| 1606 | |
| 1607 | return appctx; |
| 1608 | |
| 1609 | /* Error unrolling */ |
| 1610 | out_free_task: |
| 1611 | task_free(task); |
| 1612 | out_free_sess: |
| 1613 | session_free(sess); |
| 1614 | out_free_spoe: |
| 1615 | task_free(APPCTX_SPOE(appctx).task); |
| 1616 | out_free_appctx: |
| 1617 | appctx_free(appctx); |
| 1618 | out_error: |
| 1619 | return NULL; |
| 1620 | } |
| 1621 | |
| 1622 | /* Wake up a SPOE applet attached to a SPOE context. */ |
| 1623 | static void |
| 1624 | wakeup_spoe_appctx(struct spoe_context *ctx) |
| 1625 | { |
| 1626 | if (ctx->appctx == NULL) |
| 1627 | return; |
| 1628 | if (ctx->appctx->st0 < SPOE_APPCTX_ST_EXIT) { |
| 1629 | si_applet_want_get(ctx->appctx->owner); |
| 1630 | si_applet_want_put(ctx->appctx->owner); |
| 1631 | appctx_wakeup(ctx->appctx); |
| 1632 | } |
| 1633 | } |
| 1634 | |
| 1635 | |
| 1636 | /* Run across the list of pending streams waiting for a SPOE applet and wake the |
| 1637 | * first. */ |
| 1638 | static void |
| 1639 | offer_spoe_appctx(struct spoe_agent *agent, struct appctx *appctx) |
| 1640 | { |
| 1641 | struct spoe_context *ctx; |
| 1642 | |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 1643 | if (!appctx || appctx->st0 > SPOE_APPCTX_ST_PROCESSING) |
| 1644 | return; |
| 1645 | |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 1646 | if (LIST_ISEMPTY(&agent->applet_wq)) |
| 1647 | LIST_ADD(&agent->cache, &APPCTX_SPOE(appctx).list); |
| 1648 | else { |
| 1649 | ctx = LIST_NEXT(&agent->applet_wq, typeof(ctx), applet_wait); |
| 1650 | APPCTX_SPOE(appctx).ctx = ctx; |
| 1651 | ctx->appctx = appctx; |
| 1652 | LIST_DEL(&ctx->applet_wait); |
| 1653 | LIST_INIT(&ctx->applet_wait); |
| 1654 | task_wakeup(ctx->strm->task, TASK_WOKEN_MSG); |
| 1655 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 1656 | " - wake up stream to get available SPOE applet\n", |
| 1657 | (int)now.tv_sec, (int)now.tv_usec, agent->id, |
| 1658 | __FUNCTION__, ctx->strm); |
| 1659 | } |
| 1660 | } |
| 1661 | |
| 1662 | /* A failure occurred during SPOE applet creation. */ |
| 1663 | static void |
| 1664 | on_new_spoe_appctx_failure(struct spoe_agent *agent) |
| 1665 | { |
| 1666 | struct spoe_context *ctx; |
| 1667 | |
| 1668 | agent->new_applets--; |
| 1669 | list_for_each_entry(ctx, &agent->applet_wq, applet_wait) { |
| 1670 | ctx->errs++; |
| 1671 | task_wakeup(ctx->strm->task, TASK_WOKEN_MSG); |
| 1672 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 1673 | " - wake up stream because to SPOE applet connection failed\n", |
| 1674 | (int)now.tv_sec, (int)now.tv_usec, agent->id, |
| 1675 | __FUNCTION__, ctx->strm); |
| 1676 | } |
| 1677 | } |
| 1678 | |
| 1679 | static void |
| 1680 | on_new_spoe_appctx_success(struct spoe_agent *agent, struct appctx *appctx) |
| 1681 | { |
| 1682 | agent->new_applets--; |
| 1683 | offer_spoe_appctx(agent, appctx); |
| 1684 | } |
| 1685 | /* Retrieve a SPOE applet from the agent cache if possible, else create it. It |
| 1686 | * returns 1 on success, 0 to retry later and -1 if an error occurred. */ |
| 1687 | static int |
| 1688 | acquire_spoe_appctx(struct spoe_context *ctx, int dir) |
| 1689 | { |
| 1690 | struct spoe_config *conf = FLT_CONF(ctx->filter); |
| 1691 | struct spoe_agent *agent = conf->agent; |
| 1692 | struct appctx *appctx; |
| 1693 | |
| 1694 | /* If a process is already started for this SPOE context, retry |
| 1695 | * later. */ |
| 1696 | if (ctx->flags & SPOE_CTX_FL_PROCESS) |
| 1697 | goto wait; |
| 1698 | |
| 1699 | /* If needed, initialize the buffer that will be used to encode messages |
| 1700 | * and decode actions. */ |
| 1701 | if (ctx->buffer == &buf_empty) { |
| 1702 | if (!LIST_ISEMPTY(&ctx->buffer_wait)) { |
| 1703 | LIST_DEL(&ctx->buffer_wait); |
| 1704 | LIST_INIT(&ctx->buffer_wait); |
| 1705 | } |
| 1706 | |
| 1707 | if (!b_alloc_margin(&ctx->buffer, 0)) { |
| 1708 | LIST_ADDQ(&buffer_wq, &ctx->buffer_wait); |
| 1709 | goto wait; |
| 1710 | } |
| 1711 | } |
| 1712 | |
| 1713 | /* If the SPOE applet was already set, all is done. */ |
| 1714 | if (ctx->appctx) |
| 1715 | goto success; |
| 1716 | |
| 1717 | /* Else try to retrieve it from the agent cache */ |
| 1718 | if (!LIST_ISEMPTY(&agent->cache)) { |
| 1719 | appctx = LIST_NEXT(&agent->cache, typeof(appctx), ctx.spoe.list); |
| 1720 | LIST_DEL(&APPCTX_SPOE(appctx).list); |
| 1721 | APPCTX_SPOE(appctx).ctx = ctx; |
| 1722 | ctx->appctx = appctx; |
| 1723 | goto success; |
| 1724 | } |
| 1725 | |
| 1726 | /* If there is no server up for the agent's backend or it too many |
| 1727 | * failure occurred, this is an error. */ |
| 1728 | if ((!agent->b.be->srv_act && !agent->b.be->srv_bck) || |
| 1729 | ctx->errs >= MAX_NEW_SPOE_APPLET_ERRS) |
| 1730 | goto error; |
| 1731 | |
| 1732 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 1733 | " - waiting for available SPOE appctx\n", |
| 1734 | (int)now.tv_sec, (int)now.tv_usec, agent->id, __FUNCTION__, |
| 1735 | ctx->strm); |
| 1736 | |
| 1737 | /* Else add the stream in the waiting queue. */ |
| 1738 | if (LIST_ISEMPTY(&ctx->applet_wait)) |
| 1739 | LIST_ADDQ(&agent->applet_wq, &ctx->applet_wait); |
| 1740 | |
| 1741 | /* Finally, create new SPOE applet if we can */ |
| 1742 | if (agent->new_applets < MAX_NEW_SPOE_APPLETS) { |
| 1743 | if (create_spoe_appctx(conf) == NULL) |
| 1744 | goto error; |
| 1745 | } |
| 1746 | |
| 1747 | wait: |
| 1748 | return 0; |
| 1749 | |
| 1750 | success: |
| 1751 | /* Remove the stream from the waiting queue */ |
| 1752 | if (!LIST_ISEMPTY(&ctx->applet_wait)) { |
| 1753 | LIST_DEL(&ctx->applet_wait); |
| 1754 | LIST_INIT(&ctx->applet_wait); |
| 1755 | } |
| 1756 | |
| 1757 | /* Set the right flag to prevent request and response processing |
| 1758 | * in same time. */ |
| 1759 | ctx->flags |= ((dir == SMP_OPT_DIR_REQ) |
| 1760 | ? SPOE_CTX_FL_REQ_PROCESS |
| 1761 | : SPOE_CTX_FL_RSP_PROCESS); |
| 1762 | ctx->errs = 0; |
| 1763 | |
| 1764 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 1765 | " - acquire SPOE appctx %p from cache\n", |
| 1766 | (int)now.tv_sec, (int)now.tv_usec, agent->id, |
| 1767 | __FUNCTION__, ctx->strm, ctx->appctx); |
| 1768 | return 1; |
| 1769 | |
| 1770 | error: |
| 1771 | /* Remove the stream from the waiting queue */ |
| 1772 | if (!LIST_ISEMPTY(&ctx->applet_wait)) { |
| 1773 | LIST_DEL(&ctx->applet_wait); |
| 1774 | LIST_INIT(&ctx->applet_wait); |
| 1775 | } |
| 1776 | |
| 1777 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 1778 | " - failed to acquire SPOE appctx errs=%u\n", |
| 1779 | (int)now.tv_sec, (int)now.tv_usec, agent->id, |
| 1780 | __FUNCTION__, ctx->strm, ctx->errs); |
| 1781 | send_log(ctx->strm->be, LOG_WARNING, "failed to acquire SPOE applet.\n"); |
| 1782 | |
| 1783 | return -1; |
| 1784 | } |
| 1785 | |
| 1786 | /* Release a SPOE applet and push it in the agent cache. */ |
| 1787 | static void |
| 1788 | release_spoe_appctx(struct spoe_context *ctx) |
| 1789 | { |
| 1790 | struct spoe_config *conf = FLT_CONF(ctx->filter); |
| 1791 | struct spoe_agent *agent = conf->agent; |
| 1792 | struct appctx *appctx = ctx->appctx; |
| 1793 | |
| 1794 | /* Reset the flag to allow next processing */ |
| 1795 | ctx->flags &= ~SPOE_CTX_FL_PROCESS; |
| 1796 | |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 1797 | /* Reset processing timer */ |
| 1798 | ctx->process_exp = TICK_ETERNITY; |
| 1799 | |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 1800 | /* Release the buffer if needed */ |
| 1801 | if (ctx->buffer != &buf_empty) { |
| 1802 | b_free(&ctx->buffer); |
| 1803 | if (!LIST_ISEMPTY(&buffer_wq)) |
| 1804 | stream_offer_buffers(); |
| 1805 | } |
| 1806 | |
| 1807 | /* If there is no SPOE applet, all is done */ |
| 1808 | if (!appctx) |
| 1809 | return; |
| 1810 | |
| 1811 | /* Else, reassign it or push it in the agent cache */ |
| 1812 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 1813 | " - release SPOE appctx %p\n", |
| 1814 | (int)now.tv_sec, (int)now.tv_usec, agent->id, |
| 1815 | __FUNCTION__, ctx->strm, appctx); |
| 1816 | |
| 1817 | APPCTX_SPOE(appctx).ctx = NULL; |
| 1818 | ctx->appctx = NULL; |
| 1819 | offer_spoe_appctx(agent, appctx); |
| 1820 | } |
| 1821 | |
| 1822 | /*************************************************************************** |
| 1823 | * Functions that process SPOE messages and actions |
| 1824 | **************************************************************************/ |
| 1825 | /* Process SPOE messages for a specific event. During the processing, it returns |
| 1826 | * 0 and it returns 1 when the processing is finished. If an error occurred, -1 |
| 1827 | * is returned. */ |
| 1828 | static int |
| 1829 | process_spoe_messages(struct stream *s, struct spoe_context *ctx, |
| 1830 | struct list *messages, int dir) |
| 1831 | { |
| 1832 | struct spoe_message *msg; |
| 1833 | struct sample *smp; |
| 1834 | struct spoe_arg *arg; |
| 1835 | char *p; |
| 1836 | size_t max_size; |
| 1837 | int off, flag, idx = 0; |
| 1838 | |
| 1839 | /* Reserve 32 bytes from the frame Metadata */ |
| 1840 | max_size = APPCTX_SPOE(ctx->appctx).max_frame_size - 32; |
| 1841 | |
| 1842 | b_reset(ctx->buffer); |
| 1843 | p = ctx->buffer->p; |
| 1844 | |
| 1845 | /* Loop on messages */ |
| 1846 | list_for_each_entry(msg, messages, list) { |
| 1847 | if (idx + msg->id_len + 1 > max_size) |
| 1848 | goto skip; |
| 1849 | |
| 1850 | /* Set the message name */ |
| 1851 | idx += encode_spoe_string(msg->id, msg->id_len, p+idx); |
| 1852 | |
| 1853 | /* Save offset where to store the number of arguments for this |
| 1854 | * message */ |
| 1855 | off = idx++; |
| 1856 | p[off] = 0; |
| 1857 | |
| 1858 | /* Loop on arguments */ |
| 1859 | list_for_each_entry(arg, &msg->args, list) { |
| 1860 | p[off]++; /* Increment the number of arguments */ |
| 1861 | |
| 1862 | if (idx + arg->name_len + 1 > max_size) |
| 1863 | goto skip; |
| 1864 | |
| 1865 | /* Encode the arguement name as a string. It can by NULL */ |
| 1866 | idx += encode_spoe_string(arg->name, arg->name_len, p+idx); |
| 1867 | |
| 1868 | /* Fetch the arguement value */ |
| 1869 | smp = sample_process(s->be, s->sess, s, dir|SMP_OPT_FINAL, arg->expr, NULL); |
| 1870 | if (!smp) { |
| 1871 | /* If no value is available, set it to NULL */ |
| 1872 | p[idx++] = SPOE_DATA_T_NULL; |
| 1873 | continue; |
| 1874 | } |
| 1875 | |
| 1876 | /* Else, encode the arguement value */ |
| 1877 | switch (smp->data.type) { |
| 1878 | case SMP_T_BOOL: |
| 1879 | flag = ((!smp->data.u.sint) ? SPOE_DATA_FL_FALSE : SPOE_DATA_FL_TRUE); |
| 1880 | p[idx++] = (SPOE_DATA_T_BOOL | flag); |
| 1881 | break; |
| 1882 | case SMP_T_SINT: |
| 1883 | p[idx++] = SPOE_DATA_T_INT64; |
| 1884 | if (idx + 8 > max_size) |
| 1885 | goto skip; |
| 1886 | idx += encode_spoe_varint(smp->data.u.sint, p+idx); |
| 1887 | break; |
| 1888 | case SMP_T_IPV4: |
| 1889 | p[idx++] = SPOE_DATA_T_IPV4; |
| 1890 | if (idx + 4 > max_size) |
| 1891 | goto skip; |
| 1892 | memcpy(p+idx, &smp->data.u.ipv4, 4); |
| 1893 | idx += 4; |
| 1894 | break; |
| 1895 | case SMP_T_IPV6: |
| 1896 | p[idx++] = SPOE_DATA_T_IPV6; |
| 1897 | if (idx + 16 > max_size) |
| 1898 | goto skip; |
| 1899 | memcpy(p+idx, &smp->data.u.ipv6, 16); |
| 1900 | idx += 16; |
| 1901 | break; |
| 1902 | case SMP_T_STR: |
| 1903 | p[idx++] = SPOE_DATA_T_STR; |
| 1904 | if (idx + smp->data.u.str.len > max_size) |
| 1905 | goto skip; |
| 1906 | idx += encode_spoe_string(smp->data.u.str.str, |
| 1907 | smp->data.u.str.len, |
| 1908 | p+idx); |
| 1909 | break; |
| 1910 | case SMP_T_BIN: |
| 1911 | p[idx++] = SPOE_DATA_T_BIN; |
| 1912 | if (idx + smp->data.u.str.len > max_size) |
| 1913 | goto skip; |
| 1914 | idx += encode_spoe_string(smp->data.u.str.str, |
| 1915 | smp->data.u.str.len, |
| 1916 | p+idx); |
| 1917 | break; |
| 1918 | case SMP_T_METH: |
| 1919 | if (smp->data.u.meth.meth == HTTP_METH_OTHER) { |
| 1920 | p[idx++] = SPOE_DATA_T_STR; |
| 1921 | if (idx + http_known_methods[smp->data.u.meth.meth].len > max_size) |
| 1922 | goto skip; |
| 1923 | idx += encode_spoe_string(http_known_methods[smp->data.u.meth.meth].name, |
| 1924 | http_known_methods[smp->data.u.meth.meth].len, |
| 1925 | p+idx); |
| 1926 | } |
| 1927 | else { |
| 1928 | p[idx++] = SPOE_DATA_T_STR; |
| 1929 | if (idx + smp->data.u.str.len > max_size) |
| 1930 | goto skip; |
| 1931 | idx += encode_spoe_string(smp->data.u.meth.str.str, |
| 1932 | smp->data.u.meth.str.len, |
| 1933 | p+idx); |
| 1934 | } |
| 1935 | break; |
| 1936 | default: |
| 1937 | p[idx++] = SPOE_DATA_T_NULL; |
| 1938 | } |
| 1939 | } |
| 1940 | } |
| 1941 | ctx->buffer->i = idx; |
| 1942 | return 1; |
| 1943 | |
| 1944 | skip: |
| 1945 | b_reset(ctx->buffer); |
| 1946 | return 0; |
| 1947 | } |
| 1948 | |
| 1949 | /* Helper function to set a variable */ |
| 1950 | static void |
| 1951 | set_spoe_var(struct spoe_context *ctx, char *scope, char *name, int len, |
| 1952 | struct sample *smp) |
| 1953 | { |
| 1954 | struct spoe_config *conf = FLT_CONF(ctx->filter); |
| 1955 | struct spoe_agent *agent = conf->agent; |
| 1956 | char varname[64]; |
| 1957 | |
| 1958 | memset(varname, 0, sizeof(varname)); |
| 1959 | len = snprintf(varname, sizeof(varname), "%s.%s.%.*s", |
| 1960 | scope, agent->var_pfx, len, name); |
| 1961 | vars_set_by_name_ifexist(varname, len, smp); |
| 1962 | } |
| 1963 | |
| 1964 | /* Helper function to unset a variable */ |
| 1965 | static void |
| 1966 | unset_spoe_var(struct spoe_context *ctx, char *scope, char *name, int len, |
| 1967 | struct sample *smp) |
| 1968 | { |
| 1969 | struct spoe_config *conf = FLT_CONF(ctx->filter); |
| 1970 | struct spoe_agent *agent = conf->agent; |
| 1971 | char varname[64]; |
| 1972 | |
| 1973 | memset(varname, 0, sizeof(varname)); |
| 1974 | len = snprintf(varname, sizeof(varname), "%s.%s.%.*s", |
| 1975 | scope, agent->var_pfx, len, name); |
| 1976 | vars_unset_by_name_ifexist(varname, len, smp); |
| 1977 | } |
| 1978 | |
| 1979 | |
| 1980 | /* Process SPOE actions for a specific event. During the processing, it returns |
| 1981 | * 0 and it returns 1 when the processing is finished. If an error occurred, -1 |
| 1982 | * is returned. */ |
| 1983 | static int |
| 1984 | process_spoe_actions(struct stream *s, struct spoe_context *ctx, |
| 1985 | enum spoe_event ev, int dir) |
| 1986 | { |
| 1987 | char *p; |
| 1988 | size_t size; |
| 1989 | int off, i, idx = 0; |
| 1990 | |
| 1991 | p = ctx->buffer->p; |
| 1992 | size = ctx->buffer->i; |
| 1993 | |
| 1994 | while (idx < size) { |
| 1995 | char *str; |
| 1996 | uint64_t sz; |
| 1997 | struct sample smp; |
| 1998 | enum spoe_action_type type; |
| 1999 | |
| 2000 | off = idx; |
| 2001 | if (idx+2 > size) |
| 2002 | goto skip; |
| 2003 | |
| 2004 | type = p[idx++]; |
| 2005 | switch (type) { |
| 2006 | case SPOE_ACT_T_SET_VAR: { |
| 2007 | char *scope; |
| 2008 | |
| 2009 | if (p[idx++] != 3) |
| 2010 | goto skip_action; |
| 2011 | |
| 2012 | switch (p[idx++]) { |
| 2013 | case SPOE_SCOPE_PROC: scope = "proc"; break; |
| 2014 | case SPOE_SCOPE_SESS: scope = "sess"; break; |
| 2015 | case SPOE_SCOPE_TXN : scope = "txn"; break; |
| 2016 | case SPOE_SCOPE_REQ : scope = "req"; break; |
| 2017 | case SPOE_SCOPE_RES : scope = "res"; break; |
| 2018 | default: goto skip; |
| 2019 | } |
| 2020 | |
| 2021 | idx += decode_spoe_string(p+idx, p+size, &str, &sz); |
| 2022 | if (str == NULL) |
| 2023 | goto skip; |
| 2024 | memset(&smp, 0, sizeof(smp)); |
| 2025 | smp_set_owner(&smp, s->be, s->sess, s, dir|SMP_OPT_FINAL); |
| 2026 | if (decode_spoe_data(p+idx, p+size, &smp) == -1) |
| 2027 | goto skip; |
| 2028 | |
| 2029 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 2030 | " - set-var '%s.%s.%.*s'\n", |
| 2031 | (int)now.tv_sec, (int)now.tv_usec, |
| 2032 | ((struct spoe_config *)FLT_CONF(ctx->filter))->agent->id, |
| 2033 | __FUNCTION__, s, scope, |
| 2034 | ((struct spoe_config *)FLT_CONF(ctx->filter))->agent->var_pfx, |
| 2035 | (int)sz, str); |
| 2036 | |
| 2037 | set_spoe_var(ctx, scope, str, sz, &smp); |
| 2038 | break; |
| 2039 | } |
| 2040 | |
| 2041 | case SPOE_ACT_T_UNSET_VAR: { |
| 2042 | char *scope; |
| 2043 | |
| 2044 | if (p[idx++] != 2) |
| 2045 | goto skip_action; |
| 2046 | |
| 2047 | switch (p[idx++]) { |
| 2048 | case SPOE_SCOPE_PROC: scope = "proc"; break; |
| 2049 | case SPOE_SCOPE_SESS: scope = "sess"; break; |
| 2050 | case SPOE_SCOPE_TXN : scope = "txn"; break; |
| 2051 | case SPOE_SCOPE_REQ : scope = "req"; break; |
| 2052 | case SPOE_SCOPE_RES : scope = "res"; break; |
| 2053 | default: goto skip; |
| 2054 | } |
| 2055 | |
| 2056 | idx += decode_spoe_string(p+idx, p+size, &str, &sz); |
| 2057 | if (str == NULL) |
| 2058 | goto skip; |
| 2059 | memset(&smp, 0, sizeof(smp)); |
| 2060 | smp_set_owner(&smp, s->be, s->sess, s, dir|SMP_OPT_FINAL); |
| 2061 | |
| 2062 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 2063 | " - unset-var '%s.%s.%.*s'\n", |
| 2064 | (int)now.tv_sec, (int)now.tv_usec, |
| 2065 | ((struct spoe_config *)FLT_CONF(ctx->filter))->agent->id, |
| 2066 | __FUNCTION__, s, scope, |
| 2067 | ((struct spoe_config *)FLT_CONF(ctx->filter))->agent->var_pfx, |
| 2068 | (int)sz, str); |
| 2069 | |
| 2070 | unset_spoe_var(ctx, scope, str, sz, &smp); |
| 2071 | break; |
| 2072 | } |
| 2073 | |
| 2074 | default: |
| 2075 | skip_action: |
| 2076 | if ((i = skip_spoe_action(p+off, p+size)) == -1) |
| 2077 | goto skip; |
| 2078 | idx += i; |
| 2079 | } |
| 2080 | } |
| 2081 | |
| 2082 | return 1; |
| 2083 | skip: |
| 2084 | return 0; |
| 2085 | } |
| 2086 | |
| 2087 | |
| 2088 | /* Process a SPOE event. First, this functions will process messages attached to |
| 2089 | * this event and send them to an agent in a NOTIFY frame. Then, it will wait a |
| 2090 | * ACK frame to process corresponding actions. During all the processing, it |
| 2091 | * returns 0 and it returns 1 when the processing is finished. If an error |
| 2092 | * occurred, -1 is returned. */ |
| 2093 | static int |
| 2094 | process_spoe_event(struct stream *s, struct spoe_context *ctx, |
| 2095 | enum spoe_event ev) |
| 2096 | { |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2097 | struct spoe_config *conf = FLT_CONF(ctx->filter); |
| 2098 | struct spoe_agent *agent = conf->agent; |
| 2099 | int dir, ret = 1; |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2100 | |
| 2101 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 2102 | " - ctx-state=%s - event=%s\n", |
| 2103 | (int)now.tv_sec, (int)now.tv_usec, |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2104 | agent->id, __FUNCTION__, s, spoe_ctx_state_str[ctx->state], |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2105 | spoe_event_str[ev]); |
| 2106 | |
| 2107 | dir = ((ev < SPOE_EV_ON_SERVER_SESS) ? SMP_OPT_DIR_REQ : SMP_OPT_DIR_RES); |
| 2108 | |
| 2109 | if (LIST_ISEMPTY(&(ctx->messages[ev]))) |
| 2110 | goto out; |
| 2111 | |
| 2112 | if (ctx->state == SPOE_CTX_ST_ERROR) |
| 2113 | goto error; |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2114 | |
| 2115 | if (tick_is_expired(ctx->process_exp, now_ms) && ctx->state != SPOE_CTX_ST_DONE) { |
| 2116 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p" |
| 2117 | " - failed to process event '%s': timeout\n", |
| 2118 | (int)now.tv_sec, (int)now.tv_usec, |
| 2119 | agent->id, __FUNCTION__, s, spoe_event_str[ev]); |
| 2120 | send_log(ctx->strm->be, LOG_WARNING, |
| 2121 | "failed to process event '%s': timeout.\n", |
| 2122 | spoe_event_str[ev]); |
| 2123 | goto error; |
| 2124 | } |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2125 | |
| 2126 | if (ctx->state == SPOE_CTX_ST_READY) { |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2127 | if (!tick_isset(ctx->process_exp)) { |
| 2128 | ctx->process_exp = tick_add_ifset(now_ms, agent->timeout.processing); |
| 2129 | s->task->expire = tick_first((tick_is_expired(s->task->expire, now_ms) ? 0 : s->task->expire), |
| 2130 | ctx->process_exp); |
| 2131 | } |
| 2132 | |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2133 | ret = acquire_spoe_appctx(ctx, dir); |
| 2134 | if (ret <= 0) { |
| 2135 | if (!ret) |
| 2136 | goto out; |
| 2137 | goto error; |
| 2138 | } |
| 2139 | ctx->state = SPOE_CTX_ST_SENDING_MSGS; |
| 2140 | } |
| 2141 | |
| 2142 | if (ctx->appctx == NULL) |
| 2143 | goto error; |
| 2144 | |
| 2145 | if (ctx->state == SPOE_CTX_ST_SENDING_MSGS) { |
| 2146 | ret = process_spoe_messages(s, ctx, &(ctx->messages[ev]), dir); |
| 2147 | if (ret <= 0) { |
| 2148 | if (!ret) |
| 2149 | goto skip; |
| 2150 | goto error; |
| 2151 | } |
| 2152 | wakeup_spoe_appctx(ctx); |
| 2153 | ret = 0; |
| 2154 | goto out; |
| 2155 | } |
| 2156 | |
| 2157 | if (ctx->state == SPOE_CTX_ST_WAITING_ACK) { |
| 2158 | wakeup_spoe_appctx(ctx); |
| 2159 | ret = 0; |
| 2160 | goto out; |
| 2161 | } |
| 2162 | |
| 2163 | if (ctx->state == SPOE_CTX_ST_DONE) { |
| 2164 | ret = process_spoe_actions(s, ctx, ev, dir); |
| 2165 | if (ret <= 0) { |
| 2166 | if (!ret) |
| 2167 | goto skip; |
| 2168 | goto error; |
| 2169 | } |
| 2170 | ctx->frame_id++; |
| 2171 | release_spoe_appctx(ctx); |
| 2172 | ctx->state = SPOE_CTX_ST_READY; |
| 2173 | } |
| 2174 | |
| 2175 | out: |
| 2176 | return ret; |
| 2177 | |
| 2178 | skip: |
| 2179 | release_spoe_appctx(ctx); |
| 2180 | ctx->state = SPOE_CTX_ST_READY; |
| 2181 | return 1; |
| 2182 | |
| 2183 | error: |
| 2184 | release_spoe_appctx(ctx); |
Christopher Faulet | ea62c2a | 2016-11-14 10:54:21 +0100 | [diff] [blame^] | 2185 | ctx->state = ((agent->flags & SPOE_FL_CONT_ON_ERR) |
| 2186 | ? SPOE_CTX_ST_READY |
| 2187 | : SPOE_CTX_ST_ERROR); |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2188 | return 1; |
| 2189 | } |
| 2190 | |
| 2191 | |
| 2192 | /*************************************************************************** |
| 2193 | * Functions that create/destroy SPOE contexts |
| 2194 | **************************************************************************/ |
| 2195 | static struct spoe_context * |
| 2196 | create_spoe_context(struct filter *filter) |
| 2197 | { |
| 2198 | struct spoe_config *conf = FLT_CONF(filter); |
| 2199 | struct spoe_context *ctx; |
| 2200 | |
| 2201 | ctx = pool_alloc_dirty(pool2_spoe_ctx); |
| 2202 | if (ctx == NULL) { |
| 2203 | return NULL; |
| 2204 | } |
| 2205 | memset(ctx, 0, sizeof(*ctx)); |
| 2206 | ctx->filter = filter; |
| 2207 | ctx->state = SPOE_CTX_ST_NONE; |
| 2208 | ctx->flags = 0; |
| 2209 | ctx->errs = 0; |
| 2210 | ctx->messages = conf->agent->messages; |
| 2211 | ctx->buffer = &buf_empty; |
| 2212 | LIST_INIT(&ctx->buffer_wait); |
| 2213 | LIST_INIT(&ctx->applet_wait); |
| 2214 | |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2215 | ctx->stream_id = 0; |
| 2216 | ctx->frame_id = 1; |
| 2217 | ctx->process_exp = TICK_ETERNITY; |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2218 | |
| 2219 | return ctx; |
| 2220 | } |
| 2221 | |
| 2222 | static void |
| 2223 | destroy_spoe_context(struct spoe_context *ctx) |
| 2224 | { |
| 2225 | if (!ctx) |
| 2226 | return; |
| 2227 | |
| 2228 | if (ctx->appctx) |
| 2229 | APPCTX_SPOE(ctx->appctx).ctx = NULL; |
| 2230 | if (!LIST_ISEMPTY(&ctx->buffer_wait)) |
| 2231 | LIST_DEL(&ctx->buffer_wait); |
| 2232 | if (!LIST_ISEMPTY(&ctx->applet_wait)) |
| 2233 | LIST_DEL(&ctx->applet_wait); |
| 2234 | pool_free2(pool2_spoe_ctx, ctx); |
| 2235 | } |
| 2236 | |
| 2237 | static void |
| 2238 | reset_spoe_context(struct spoe_context *ctx) |
| 2239 | { |
| 2240 | ctx->state = SPOE_CTX_ST_READY; |
| 2241 | ctx->flags &= ~SPOE_CTX_FL_PROCESS; |
| 2242 | } |
| 2243 | |
| 2244 | |
| 2245 | /*************************************************************************** |
| 2246 | * Hooks that manage the filter lifecycle (init/check/deinit) |
| 2247 | **************************************************************************/ |
| 2248 | /* Signal handler: Do a soft stop, wakeup SPOE applet */ |
| 2249 | static void |
| 2250 | sig_stop_spoe(struct sig_handler *sh) |
| 2251 | { |
| 2252 | struct proxy *p; |
| 2253 | |
| 2254 | p = proxy; |
| 2255 | while (p) { |
| 2256 | struct flt_conf *fconf; |
| 2257 | |
| 2258 | list_for_each_entry(fconf, &p->filter_configs, list) { |
| 2259 | struct spoe_config *conf = fconf->conf; |
| 2260 | struct spoe_agent *agent = conf->agent; |
| 2261 | struct appctx *appctx; |
| 2262 | |
| 2263 | list_for_each_entry(appctx, &agent->cache, ctx.spoe.list) { |
| 2264 | si_applet_want_get(appctx->owner); |
| 2265 | si_applet_want_put(appctx->owner); |
| 2266 | appctx_wakeup(appctx); |
| 2267 | } |
| 2268 | } |
| 2269 | p = p->next; |
| 2270 | } |
| 2271 | } |
| 2272 | |
| 2273 | |
| 2274 | /* Initialize the SPOE filter. Returns -1 on error, else 0. */ |
| 2275 | static int |
| 2276 | spoe_init(struct proxy *px, struct flt_conf *fconf) |
| 2277 | { |
| 2278 | struct spoe_config *conf = fconf->conf; |
| 2279 | struct listener *l; |
| 2280 | |
| 2281 | memset(&conf->agent_fe, 0, sizeof(conf->agent_fe)); |
| 2282 | init_new_proxy(&conf->agent_fe); |
| 2283 | conf->agent_fe.parent = conf->agent; |
| 2284 | conf->agent_fe.last_change = now.tv_sec; |
| 2285 | conf->agent_fe.id = conf->agent->id; |
| 2286 | conf->agent_fe.cap = PR_CAP_FE; |
| 2287 | conf->agent_fe.mode = PR_MODE_TCP; |
| 2288 | conf->agent_fe.maxconn = 0; |
| 2289 | conf->agent_fe.options2 |= PR_O2_INDEPSTR; |
| 2290 | conf->agent_fe.conn_retries = CONN_RETRIES; |
| 2291 | conf->agent_fe.accept = frontend_accept; |
| 2292 | conf->agent_fe.srv = NULL; |
| 2293 | conf->agent_fe.timeout.client = TICK_ETERNITY; |
| 2294 | conf->agent_fe.default_target = &spoe_applet.obj_type; |
| 2295 | conf->agent_fe.fe_req_ana = AN_REQ_SWITCHING_RULES; |
| 2296 | |
| 2297 | if ((l = calloc(1, sizeof(*l))) == NULL) { |
| 2298 | Alert("spoe_init : out of memory.\n"); |
| 2299 | goto out_error; |
| 2300 | } |
| 2301 | l->obj_type = OBJ_TYPE_LISTENER; |
| 2302 | l->obj_type = OBJ_TYPE_LISTENER; |
| 2303 | l->frontend = &conf->agent_fe; |
| 2304 | l->state = LI_READY; |
| 2305 | l->analysers = conf->agent_fe.fe_req_ana; |
| 2306 | LIST_ADDQ(&conf->agent_fe.conf.listeners, &l->by_fe); |
| 2307 | |
| 2308 | if (!sighandler_registered) { |
| 2309 | signal_register_fct(0, sig_stop_spoe, 0); |
| 2310 | sighandler_registered = 1; |
| 2311 | } |
| 2312 | |
| 2313 | return 0; |
| 2314 | |
| 2315 | out_error: |
| 2316 | return -1; |
| 2317 | } |
| 2318 | |
| 2319 | /* Free ressources allocated by the SPOE filter. */ |
| 2320 | static void |
| 2321 | spoe_deinit(struct proxy *px, struct flt_conf *fconf) |
| 2322 | { |
| 2323 | struct spoe_config *conf = fconf->conf; |
| 2324 | |
| 2325 | if (conf) { |
| 2326 | struct spoe_agent *agent = conf->agent; |
| 2327 | struct listener *l = LIST_NEXT(&conf->agent_fe.conf.listeners, |
| 2328 | struct listener *, by_fe); |
| 2329 | |
| 2330 | free(l); |
| 2331 | release_spoe_agent(agent); |
| 2332 | free(conf); |
| 2333 | } |
| 2334 | fconf->conf = NULL; |
| 2335 | } |
| 2336 | |
| 2337 | /* Check configuration of a SPOE filter for a specified proxy. |
| 2338 | * Return 1 on error, else 0. */ |
| 2339 | static int |
| 2340 | spoe_check(struct proxy *px, struct flt_conf *fconf) |
| 2341 | { |
| 2342 | struct spoe_config *conf = fconf->conf; |
| 2343 | struct proxy *target; |
| 2344 | |
| 2345 | target = proxy_be_by_name(conf->agent->b.name); |
| 2346 | if (target == NULL) { |
| 2347 | Alert("Proxy %s : unknown backend '%s' used by SPOE agent '%s'" |
| 2348 | " declared at %s:%d.\n", |
| 2349 | px->id, conf->agent->b.name, conf->agent->id, |
| 2350 | conf->agent->conf.file, conf->agent->conf.line); |
| 2351 | return 1; |
| 2352 | } |
| 2353 | if (target->mode != PR_MODE_TCP) { |
| 2354 | Alert("Proxy %s : backend '%s' used by SPOE agent '%s' declared" |
| 2355 | " at %s:%d does not support HTTP mode.\n", |
| 2356 | px->id, target->id, conf->agent->id, |
| 2357 | conf->agent->conf.file, conf->agent->conf.line); |
| 2358 | return 1; |
| 2359 | } |
| 2360 | |
| 2361 | free(conf->agent->b.name); |
| 2362 | conf->agent->b.name = NULL; |
| 2363 | conf->agent->b.be = target; |
| 2364 | return 0; |
| 2365 | } |
| 2366 | |
| 2367 | /************************************************************************** |
| 2368 | * Hooks attached to a stream |
| 2369 | *************************************************************************/ |
| 2370 | /* Called when a filter instance is created and attach to a stream. It creates |
| 2371 | * the context that will be used to process this stream. */ |
| 2372 | static int |
| 2373 | spoe_start(struct stream *s, struct filter *filter) |
| 2374 | { |
| 2375 | struct spoe_context *ctx; |
| 2376 | |
| 2377 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p\n", |
| 2378 | (int)now.tv_sec, (int)now.tv_usec, |
| 2379 | ((struct spoe_config *)FLT_CONF(filter))->agent->id, |
| 2380 | __FUNCTION__, s); |
| 2381 | |
| 2382 | ctx = create_spoe_context(filter); |
| 2383 | if (ctx == NULL) { |
| 2384 | send_log(s->be, LOG_EMERG, |
| 2385 | "failed to create SPOE context for proxy %s\n", |
| 2386 | s->be->id); |
| 2387 | return 0; |
| 2388 | } |
| 2389 | |
| 2390 | ctx->strm = s; |
| 2391 | ctx->state = SPOE_CTX_ST_READY; |
| 2392 | filter->ctx = ctx; |
| 2393 | |
| 2394 | if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_TCP_REQ_FE])) |
| 2395 | filter->pre_analyzers |= AN_REQ_INSPECT_FE; |
| 2396 | |
| 2397 | if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_TCP_REQ_BE])) |
| 2398 | filter->pre_analyzers |= AN_REQ_INSPECT_BE; |
| 2399 | |
| 2400 | if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_TCP_RSP])) |
| 2401 | filter->pre_analyzers |= AN_RES_INSPECT; |
| 2402 | |
| 2403 | if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_HTTP_REQ_FE])) |
| 2404 | filter->pre_analyzers |= AN_REQ_HTTP_PROCESS_FE; |
| 2405 | |
| 2406 | if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_HTTP_REQ_BE])) |
| 2407 | filter->pre_analyzers |= AN_REQ_HTTP_PROCESS_BE; |
| 2408 | |
| 2409 | if (!LIST_ISEMPTY(&ctx->messages[SPOE_EV_ON_HTTP_RSP])) |
| 2410 | filter->pre_analyzers |= AN_RES_HTTP_PROCESS_FE; |
| 2411 | |
| 2412 | return 1; |
| 2413 | } |
| 2414 | |
| 2415 | /* Called when a filter instance is detached from a stream. It release the |
| 2416 | * attached SPOE context. */ |
| 2417 | static void |
| 2418 | spoe_stop(struct stream *s, struct filter *filter) |
| 2419 | { |
| 2420 | struct spoe_context *ctx = filter->ctx; |
| 2421 | |
| 2422 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p\n", |
| 2423 | (int)now.tv_sec, (int)now.tv_usec, |
| 2424 | ((struct spoe_config *)FLT_CONF(filter))->agent->id, |
| 2425 | __FUNCTION__, s); |
| 2426 | |
| 2427 | if (ctx) { |
| 2428 | release_spoe_appctx(ctx); |
| 2429 | destroy_spoe_context(ctx); |
| 2430 | } |
| 2431 | } |
| 2432 | |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2433 | |
| 2434 | /* |
| 2435 | * Called when the stream is woken up because of expired timer. |
| 2436 | */ |
| 2437 | static void |
| 2438 | spoe_check_timeouts(struct stream *s, struct filter *filter) |
| 2439 | { |
| 2440 | struct spoe_context *ctx = filter->ctx; |
| 2441 | |
| 2442 | if (tick_is_expired(ctx->process_exp, now_ms)) |
| 2443 | s->task->state |= TASK_WOKEN_MSG; |
| 2444 | } |
| 2445 | |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2446 | /* Called when we are ready to filter data on a channel */ |
| 2447 | static int |
| 2448 | spoe_start_analyze(struct stream *s, struct filter *filter, struct channel *chn) |
| 2449 | { |
| 2450 | struct spoe_context *ctx = filter->ctx; |
| 2451 | int ret = 1; |
| 2452 | |
| 2453 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p - ctx-state=%s" |
| 2454 | " - ctx-flags=0x%08x\n", |
| 2455 | (int)now.tv_sec, (int)now.tv_usec, |
| 2456 | ((struct spoe_config *)FLT_CONF(filter))->agent->id, |
| 2457 | __FUNCTION__, s, spoe_ctx_state_str[ctx->state], ctx->flags); |
| 2458 | |
| 2459 | if (!(chn->flags & CF_ISRESP)) { |
| 2460 | if (filter->pre_analyzers & AN_REQ_INSPECT_FE) |
| 2461 | chn->analysers |= AN_REQ_INSPECT_FE; |
| 2462 | if (filter->pre_analyzers & AN_REQ_INSPECT_BE) |
| 2463 | chn->analysers |= AN_REQ_INSPECT_BE; |
| 2464 | |
| 2465 | if (ctx->flags & SPOE_CTX_FL_CLI_CONNECTED) |
| 2466 | goto out; |
| 2467 | |
| 2468 | ctx->stream_id = s->uniq_id; |
| 2469 | if (ctx->state != SPOE_CTX_ST_NONE && ctx->state != SPOE_CTX_ST_ERROR) { |
| 2470 | ret = process_spoe_event(s, ctx, SPOE_EV_ON_CLIENT_SESS); |
| 2471 | if (ret != 1) |
| 2472 | goto out; |
| 2473 | } |
| 2474 | ctx->flags |= SPOE_CTX_FL_CLI_CONNECTED; |
| 2475 | } |
| 2476 | else { |
| 2477 | if (filter->pre_analyzers & SPOE_EV_ON_TCP_RSP) |
| 2478 | chn->analysers |= AN_RES_INSPECT; |
| 2479 | |
| 2480 | if (ctx->flags & SPOE_CTX_FL_SRV_CONNECTED) |
| 2481 | goto out; |
| 2482 | |
| 2483 | if (ctx->state != SPOE_CTX_ST_NONE && ctx->state != SPOE_CTX_ST_ERROR) { |
| 2484 | ret = process_spoe_event(s, ctx, SPOE_EV_ON_SERVER_SESS); |
| 2485 | if (ret != 1) |
| 2486 | goto out; |
| 2487 | } |
| 2488 | ctx->flags |= SPOE_CTX_FL_SRV_CONNECTED; |
| 2489 | } |
| 2490 | |
| 2491 | out: |
| 2492 | if (!ret) { |
| 2493 | channel_dont_read(chn); |
| 2494 | channel_dont_close(chn); |
| 2495 | } |
| 2496 | return ret; |
| 2497 | } |
| 2498 | |
| 2499 | /* Called before a processing happens on a given channel */ |
| 2500 | static int |
| 2501 | spoe_chn_pre_analyze(struct stream *s, struct filter *filter, |
| 2502 | struct channel *chn, unsigned an_bit) |
| 2503 | { |
| 2504 | struct spoe_context *ctx = filter->ctx; |
| 2505 | int ret = 1; |
| 2506 | |
| 2507 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p - ctx-state=%s" |
| 2508 | " - ctx-flags=0x%08x - ana=0x%08x\n", |
| 2509 | (int)now.tv_sec, (int)now.tv_usec, |
| 2510 | ((struct spoe_config *)FLT_CONF(filter))->agent->id, |
| 2511 | __FUNCTION__, s, spoe_ctx_state_str[ctx->state], |
| 2512 | ctx->flags, an_bit); |
| 2513 | |
| 2514 | if (ctx->state == SPOE_CTX_ST_NONE || ctx->state == SPOE_CTX_ST_ERROR) |
| 2515 | goto out; |
| 2516 | |
| 2517 | switch (an_bit) { |
| 2518 | case AN_REQ_INSPECT_FE: |
| 2519 | ret = process_spoe_event(s, ctx, SPOE_EV_ON_TCP_REQ_FE); |
| 2520 | break; |
| 2521 | case AN_REQ_INSPECT_BE: |
| 2522 | ret = process_spoe_event(s, ctx, SPOE_EV_ON_TCP_REQ_BE); |
| 2523 | break; |
| 2524 | case AN_RES_INSPECT: |
| 2525 | ret = process_spoe_event(s, ctx, SPOE_EV_ON_TCP_RSP); |
| 2526 | break; |
| 2527 | case AN_REQ_HTTP_PROCESS_FE: |
| 2528 | ret = process_spoe_event(s, ctx, SPOE_EV_ON_HTTP_REQ_FE); |
| 2529 | break; |
| 2530 | case AN_REQ_HTTP_PROCESS_BE: |
| 2531 | ret = process_spoe_event(s, ctx, SPOE_EV_ON_HTTP_REQ_BE); |
| 2532 | break; |
| 2533 | case AN_RES_HTTP_PROCESS_FE: |
| 2534 | ret = process_spoe_event(s, ctx, SPOE_EV_ON_HTTP_RSP); |
| 2535 | break; |
| 2536 | } |
| 2537 | |
| 2538 | out: |
| 2539 | if (!ret) { |
| 2540 | channel_dont_read(chn); |
| 2541 | channel_dont_close(chn); |
| 2542 | } |
| 2543 | return ret; |
| 2544 | } |
| 2545 | |
| 2546 | /* Called when the filtering on the channel ends. */ |
| 2547 | static int |
| 2548 | spoe_end_analyze(struct stream *s, struct filter *filter, struct channel *chn) |
| 2549 | { |
| 2550 | struct spoe_context *ctx = filter->ctx; |
| 2551 | |
| 2552 | SPOE_PRINTF(stderr, "%d.%06d [SPOE/%-15s] %s: stream=%p - ctx-state=%s" |
| 2553 | " - ctx-flags=0x%08x\n", |
| 2554 | (int)now.tv_sec, (int)now.tv_usec, |
| 2555 | ((struct spoe_config *)FLT_CONF(filter))->agent->id, |
| 2556 | __FUNCTION__, s, spoe_ctx_state_str[ctx->state], ctx->flags); |
| 2557 | |
| 2558 | if (!(ctx->flags & SPOE_CTX_FL_PROCESS)) { |
| 2559 | reset_spoe_context(ctx); |
| 2560 | } |
| 2561 | |
| 2562 | return 1; |
| 2563 | } |
| 2564 | |
| 2565 | /******************************************************************** |
| 2566 | * Functions that manage the filter initialization |
| 2567 | ********************************************************************/ |
| 2568 | struct flt_ops spoe_ops = { |
| 2569 | /* Manage SPOE filter, called for each filter declaration */ |
| 2570 | .init = spoe_init, |
| 2571 | .deinit = spoe_deinit, |
| 2572 | .check = spoe_check, |
| 2573 | |
| 2574 | /* Handle start/stop of SPOE */ |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2575 | .attach = spoe_start, |
| 2576 | .detach = spoe_stop, |
| 2577 | .check_timeouts = spoe_check_timeouts, |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2578 | |
| 2579 | /* Handle channels activity */ |
| 2580 | .channel_start_analyze = spoe_start_analyze, |
| 2581 | .channel_pre_analyze = spoe_chn_pre_analyze, |
| 2582 | .channel_end_analyze = spoe_end_analyze, |
| 2583 | }; |
| 2584 | |
| 2585 | |
| 2586 | static int |
| 2587 | cfg_parse_spoe_agent(const char *file, int linenum, char **args, int kwm) |
| 2588 | { |
| 2589 | const char *err; |
| 2590 | int i, err_code = 0; |
| 2591 | |
| 2592 | if ((cfg_scope == NULL && curengine != NULL) || |
| 2593 | (cfg_scope != NULL && curengine == NULL) || |
| 2594 | strcmp(curengine, cfg_scope)) |
| 2595 | goto out; |
| 2596 | |
| 2597 | if (!strcmp(args[0], "spoe-agent")) { /* new spoe-agent section */ |
| 2598 | if (!*args[1]) { |
| 2599 | Alert("parsing [%s:%d] : missing name for spoe-agent section.\n", |
| 2600 | file, linenum); |
| 2601 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2602 | goto out; |
| 2603 | } |
| 2604 | if (*args[2]) { |
| 2605 | Alert("parsing [%s:%d] : cannot handle unexpected argument '%s'.\n", |
| 2606 | file, linenum, args[2]); |
| 2607 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2608 | goto out; |
| 2609 | } |
| 2610 | |
| 2611 | err = invalid_char(args[1]); |
| 2612 | if (err) { |
| 2613 | Alert("parsing [%s:%d] : character '%c' is not permitted in '%s' name '%s'.\n", |
| 2614 | file, linenum, *err, args[0], args[1]); |
| 2615 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2616 | goto out; |
| 2617 | } |
| 2618 | |
| 2619 | if (curagent != NULL) { |
| 2620 | Alert("parsing [%s:%d] : another spoe-agent section previously defined.\n", |
| 2621 | file, linenum); |
| 2622 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2623 | goto out; |
| 2624 | } |
| 2625 | if ((curagent = calloc(1, sizeof(*curagent))) == NULL) { |
| 2626 | Alert("parsing [%s:%d] : out of memory.\n", file, linenum); |
| 2627 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2628 | goto out; |
| 2629 | } |
| 2630 | |
| 2631 | curagent->id = strdup(args[1]); |
| 2632 | curagent->conf.file = strdup(file); |
| 2633 | curagent->conf.line = linenum; |
| 2634 | curagent->timeout.hello = TICK_ETERNITY; |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2635 | curagent->timeout.idle = TICK_ETERNITY; |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2636 | curagent->timeout.processing = TICK_ETERNITY; |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2637 | curagent->var_pfx = NULL; |
Christopher Faulet | ea62c2a | 2016-11-14 10:54:21 +0100 | [diff] [blame^] | 2638 | curagent->flags = 0; |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2639 | curagent->new_applets = 0; |
| 2640 | |
| 2641 | for (i = 0; i < SPOE_EV_EVENTS; ++i) |
| 2642 | LIST_INIT(&curagent->messages[i]); |
| 2643 | LIST_INIT(&curagent->cache); |
| 2644 | LIST_INIT(&curagent->applet_wq); |
| 2645 | } |
| 2646 | else if (!strcmp(args[0], "use-backend")) { |
| 2647 | if (!*args[1]) { |
| 2648 | Alert("parsing [%s:%d] : '%s' expects a backend name.\n", |
| 2649 | file, linenum, args[0]); |
| 2650 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2651 | goto out; |
| 2652 | } |
| 2653 | if (*args[2]) { |
| 2654 | Alert("parsing [%s:%d] : cannot handle unexpected argument '%s'.\n", |
| 2655 | file, linenum, args[2]); |
| 2656 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2657 | goto out; |
| 2658 | } |
| 2659 | free(curagent->b.name); |
| 2660 | curagent->b.name = strdup(args[1]); |
| 2661 | } |
| 2662 | else if (!strcmp(args[0], "messages")) { |
| 2663 | int cur_arg = 1; |
| 2664 | while (*args[cur_arg]) { |
| 2665 | struct spoe_msg_placeholder *mp = NULL; |
| 2666 | |
| 2667 | list_for_each_entry(mp, &curmps, list) { |
| 2668 | if (!strcmp(mp->id, args[cur_arg])) { |
| 2669 | Alert("parsing [%s:%d]: spoe-message message '%s' already declared.\n", |
| 2670 | file, linenum, args[cur_arg]); |
| 2671 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2672 | goto out; |
| 2673 | } |
| 2674 | } |
| 2675 | |
| 2676 | if ((mp = calloc(1, sizeof(*mp))) == NULL) { |
| 2677 | Alert("parsing [%s:%d] : out of memory.\n", file, linenum); |
| 2678 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2679 | goto out; |
| 2680 | } |
| 2681 | mp->id = strdup(args[cur_arg]); |
| 2682 | LIST_ADDQ(&curmps, &mp->list); |
| 2683 | cur_arg++; |
| 2684 | } |
| 2685 | } |
| 2686 | else if (!strcmp(args[0], "timeout")) { |
| 2687 | unsigned int *tv = NULL; |
| 2688 | const char *res; |
| 2689 | unsigned timeout; |
| 2690 | |
| 2691 | if (!*args[1]) { |
| 2692 | Alert("parsing [%s:%d] : 'timeout' expects 'connect', 'idle' and 'ack'.\n", |
| 2693 | file, linenum); |
| 2694 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2695 | goto out; |
| 2696 | } |
| 2697 | if (!strcmp(args[1], "hello")) |
| 2698 | tv = &curagent->timeout.hello; |
| 2699 | else if (!strcmp(args[1], "idle")) |
| 2700 | tv = &curagent->timeout.idle; |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 2701 | else if (!strcmp(args[1], "processing")) |
| 2702 | tv = &curagent->timeout.processing; |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2703 | else { |
Christopher Faulet | 03a3449 | 2016-11-19 16:47:56 +0100 | [diff] [blame] | 2704 | Alert("parsing [%s:%d] : 'timeout' supports 'connect', 'idle' or 'processing' (got %s).\n", |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2705 | file, linenum, args[1]); |
| 2706 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2707 | goto out; |
| 2708 | } |
| 2709 | if (!*args[2]) { |
| 2710 | Alert("parsing [%s:%d] : 'timeout %s' expects an integer value (in milliseconds).\n", |
| 2711 | file, linenum, args[1]); |
| 2712 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2713 | goto out; |
| 2714 | } |
| 2715 | res = parse_time_err(args[2], &timeout, TIME_UNIT_MS); |
| 2716 | if (res) { |
| 2717 | Alert("parsing [%s:%d] : unexpected character '%c' in 'timeout %s'.\n", |
| 2718 | file, linenum, *res, args[1]); |
| 2719 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2720 | goto out; |
| 2721 | } |
| 2722 | if (*args[3]) { |
| 2723 | Alert("parsing [%s:%d] : cannot handle unexpected argument '%s'.\n", |
| 2724 | file, linenum, args[3]); |
| 2725 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2726 | goto out; |
| 2727 | } |
| 2728 | *tv = MS_TO_TICKS(timeout); |
| 2729 | } |
| 2730 | else if (!strcmp(args[0], "option")) { |
| 2731 | if (!*args[1]) { |
| 2732 | Alert("parsing [%s:%d]: '%s' expects an option name.\n", |
| 2733 | file, linenum, args[0]); |
| 2734 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2735 | goto out; |
| 2736 | } |
| 2737 | if (!strcmp(args[1], "var-prefix")) { |
| 2738 | char *tmp; |
| 2739 | |
| 2740 | if (!*args[2]) { |
| 2741 | Alert("parsing [%s:%d]: '%s %s' expects a value.\n", |
| 2742 | file, linenum, args[0], |
| 2743 | args[1]); |
| 2744 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2745 | goto out; |
| 2746 | } |
| 2747 | tmp = args[2]; |
| 2748 | while (*tmp) { |
| 2749 | if (!isalnum(*tmp) && *tmp != '_' && *tmp != '.') { |
| 2750 | Alert("parsing [%s:%d]: '%s %s' only supports [a-zA-Z_-.] chars.\n", |
| 2751 | file, linenum, args[0], args[1]); |
| 2752 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2753 | goto out; |
| 2754 | } |
| 2755 | tmp++; |
| 2756 | } |
| 2757 | curagent->var_pfx = strdup(args[2]); |
| 2758 | } |
Christopher Faulet | ea62c2a | 2016-11-14 10:54:21 +0100 | [diff] [blame^] | 2759 | else if (!strcmp(args[1], "continue-on-error")) { |
| 2760 | if (*args[2]) { |
| 2761 | Alert("parsing [%s:%d] : cannot handle unexpected argument '%s'.\n", |
| 2762 | file, linenum, args[3]); |
| 2763 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2764 | goto out; |
| 2765 | } |
| 2766 | curagent->flags |= SPOE_FL_CONT_ON_ERR; |
| 2767 | } |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 2768 | else { |
| 2769 | Alert("parsing [%s:%d]: option '%s' is not supported.\n", |
| 2770 | file, linenum, args[1]); |
| 2771 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2772 | goto out; |
| 2773 | } |
| 2774 | } |
| 2775 | else if (*args[0]) { |
| 2776 | Alert("parsing [%s:%d] : unknown keyword '%s' in spoe-agent section.\n", |
| 2777 | file, linenum, args[0]); |
| 2778 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2779 | goto out; |
| 2780 | } |
| 2781 | out: |
| 2782 | return err_code; |
| 2783 | } |
| 2784 | |
| 2785 | static int |
| 2786 | cfg_parse_spoe_message(const char *file, int linenum, char **args, int kwm) |
| 2787 | { |
| 2788 | struct spoe_message *msg; |
| 2789 | struct spoe_arg *arg; |
| 2790 | const char *err; |
| 2791 | char *errmsg = NULL; |
| 2792 | int err_code = 0; |
| 2793 | |
| 2794 | if ((cfg_scope == NULL && curengine != NULL) || |
| 2795 | (cfg_scope != NULL && curengine == NULL) || |
| 2796 | strcmp(curengine, cfg_scope)) |
| 2797 | goto out; |
| 2798 | |
| 2799 | if (!strcmp(args[0], "spoe-message")) { /* new spoe-message section */ |
| 2800 | if (!*args[1]) { |
| 2801 | Alert("parsing [%s:%d] : missing name for spoe-message section.\n", |
| 2802 | file, linenum); |
| 2803 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2804 | goto out; |
| 2805 | } |
| 2806 | if (*args[2]) { |
| 2807 | Alert("parsing [%s:%d] : cannot handle unexpected argument '%s'.\n", |
| 2808 | file, linenum, args[2]); |
| 2809 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2810 | goto out; |
| 2811 | } |
| 2812 | |
| 2813 | err = invalid_char(args[1]); |
| 2814 | if (err) { |
| 2815 | Alert("parsing [%s:%d] : character '%c' is not permitted in '%s' name '%s'.\n", |
| 2816 | file, linenum, *err, args[0], args[1]); |
| 2817 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2818 | goto out; |
| 2819 | } |
| 2820 | |
| 2821 | list_for_each_entry(msg, &curmsgs, list) { |
| 2822 | if (!strcmp(msg->id, args[1])) { |
| 2823 | Alert("parsing [%s:%d]: spoe-message section '%s' has the same" |
| 2824 | " name as another one declared at %s:%d.\n", |
| 2825 | file, linenum, args[1], msg->conf.file, msg->conf.line); |
| 2826 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2827 | goto out; |
| 2828 | } |
| 2829 | } |
| 2830 | |
| 2831 | if ((curmsg = calloc(1, sizeof(*curmsg))) == NULL) { |
| 2832 | Alert("parsing [%s:%d] : out of memory.\n", file, linenum); |
| 2833 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2834 | goto out; |
| 2835 | } |
| 2836 | |
| 2837 | curmsg->id = strdup(args[1]); |
| 2838 | curmsg->id_len = strlen(curmsg->id); |
| 2839 | curmsg->event = SPOE_EV_NONE; |
| 2840 | curmsg->conf.file = strdup(file); |
| 2841 | curmsg->conf.line = linenum; |
| 2842 | LIST_INIT(&curmsg->args); |
| 2843 | LIST_ADDQ(&curmsgs, &curmsg->list); |
| 2844 | } |
| 2845 | else if (!strcmp(args[0], "args")) { |
| 2846 | int cur_arg = 1; |
| 2847 | |
| 2848 | curproxy->conf.args.ctx = ARGC_SPOE; |
| 2849 | curproxy->conf.args.file = file; |
| 2850 | curproxy->conf.args.line = linenum; |
| 2851 | while (*args[cur_arg]) { |
| 2852 | char *delim = strchr(args[cur_arg], '='); |
| 2853 | int idx = 0; |
| 2854 | |
| 2855 | if ((arg = calloc(1, sizeof(*arg))) == NULL) { |
| 2856 | Alert("parsing [%s:%d] : out of memory.\n", file, linenum); |
| 2857 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2858 | goto out; |
| 2859 | } |
| 2860 | |
| 2861 | if (!delim) { |
| 2862 | arg->name = NULL; |
| 2863 | arg->name_len = 0; |
| 2864 | delim = args[cur_arg]; |
| 2865 | } |
| 2866 | else { |
| 2867 | arg->name = my_strndup(args[cur_arg], delim - args[cur_arg]); |
| 2868 | arg->name_len = delim - args[cur_arg]; |
| 2869 | delim++; |
| 2870 | } |
| 2871 | |
| 2872 | arg->expr = sample_parse_expr(&delim, &idx, file, linenum, &errmsg, &curproxy->conf.args); |
| 2873 | if (arg->expr == NULL) { |
| 2874 | Alert("parsing [%s:%d] : '%s': %s.\n", file, linenum, args[0], errmsg); |
| 2875 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2876 | free(arg->name); |
| 2877 | free(arg); |
| 2878 | goto out; |
| 2879 | } |
| 2880 | LIST_ADDQ(&curmsg->args, &arg->list); |
| 2881 | cur_arg++; |
| 2882 | } |
| 2883 | curproxy->conf.args.file = NULL; |
| 2884 | curproxy->conf.args.line = 0; |
| 2885 | } |
| 2886 | else if (!strcmp(args[0], "event")) { |
| 2887 | if (!*args[1]) { |
| 2888 | Alert("parsing [%s:%d] : missing event name.\n", file, linenum); |
| 2889 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2890 | goto out; |
| 2891 | } |
| 2892 | if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_CLIENT_SESS])) |
| 2893 | curmsg->event = SPOE_EV_ON_CLIENT_SESS; |
| 2894 | else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_SERVER_SESS])) |
| 2895 | curmsg->event = SPOE_EV_ON_SERVER_SESS; |
| 2896 | |
| 2897 | else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_TCP_REQ_FE])) |
| 2898 | curmsg->event = SPOE_EV_ON_TCP_REQ_FE; |
| 2899 | else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_TCP_REQ_BE])) |
| 2900 | curmsg->event = SPOE_EV_ON_TCP_REQ_BE; |
| 2901 | else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_TCP_RSP])) |
| 2902 | curmsg->event = SPOE_EV_ON_TCP_RSP; |
| 2903 | |
| 2904 | else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_HTTP_REQ_FE])) |
| 2905 | curmsg->event = SPOE_EV_ON_HTTP_REQ_FE; |
| 2906 | else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_HTTP_REQ_BE])) |
| 2907 | curmsg->event = SPOE_EV_ON_HTTP_REQ_BE; |
| 2908 | else if (!strcmp(args[1], spoe_event_str[SPOE_EV_ON_HTTP_RSP])) |
| 2909 | curmsg->event = SPOE_EV_ON_HTTP_RSP; |
| 2910 | else { |
| 2911 | Alert("parsing [%s:%d] : unkown event '%s'.\n", |
| 2912 | file, linenum, args[1]); |
| 2913 | err_code |= ERR_ALERT | ERR_ABORT; |
| 2914 | goto out; |
| 2915 | } |
| 2916 | } |
| 2917 | else if (!*args[0]) { |
| 2918 | Alert("parsing [%s:%d] : unknown keyword '%s' in spoe-message section.\n", |
| 2919 | file, linenum, args[0]); |
| 2920 | err_code |= ERR_ALERT | ERR_FATAL; |
| 2921 | goto out; |
| 2922 | } |
| 2923 | out: |
| 2924 | free(errmsg); |
| 2925 | return err_code; |
| 2926 | } |
| 2927 | |
| 2928 | /* Return -1 on error, else 0 */ |
| 2929 | static int |
| 2930 | parse_spoe_flt(char **args, int *cur_arg, struct proxy *px, |
| 2931 | struct flt_conf *fconf, char **err, void *private) |
| 2932 | { |
| 2933 | struct list backup_sections; |
| 2934 | struct spoe_config *conf; |
| 2935 | struct spoe_message *msg, *msgback; |
| 2936 | struct spoe_msg_placeholder *mp, *mpback; |
| 2937 | char *file = NULL, *engine = NULL; |
| 2938 | int ret, pos = *cur_arg + 1; |
| 2939 | |
| 2940 | conf = calloc(1, sizeof(*conf)); |
| 2941 | if (conf == NULL) { |
| 2942 | memprintf(err, "%s: out of memory", args[*cur_arg]); |
| 2943 | goto error; |
| 2944 | } |
| 2945 | conf->proxy = px; |
| 2946 | |
| 2947 | while (*args[pos]) { |
| 2948 | if (!strcmp(args[pos], "config")) { |
| 2949 | if (!*args[pos+1]) { |
| 2950 | memprintf(err, "'%s' : '%s' option without value", |
| 2951 | args[*cur_arg], args[pos]); |
| 2952 | goto error; |
| 2953 | } |
| 2954 | file = args[pos+1]; |
| 2955 | pos += 2; |
| 2956 | } |
| 2957 | else if (!strcmp(args[pos], "engine")) { |
| 2958 | if (!*args[pos+1]) { |
| 2959 | memprintf(err, "'%s' : '%s' option without value", |
| 2960 | args[*cur_arg], args[pos]); |
| 2961 | goto error; |
| 2962 | } |
| 2963 | engine = args[pos+1]; |
| 2964 | pos += 2; |
| 2965 | } |
| 2966 | else { |
| 2967 | memprintf(err, "unknown keyword '%s'", args[pos]); |
| 2968 | goto error; |
| 2969 | } |
| 2970 | } |
| 2971 | if (file == NULL) { |
| 2972 | memprintf(err, "'%s' : missing config file", args[*cur_arg]); |
| 2973 | goto error; |
| 2974 | } |
| 2975 | |
| 2976 | /* backup sections and register SPOE sections */ |
| 2977 | LIST_INIT(&backup_sections); |
| 2978 | cfg_backup_sections(&backup_sections); |
| 2979 | cfg_register_section("spoe-agent", cfg_parse_spoe_agent); |
| 2980 | cfg_register_section("spoe-message", cfg_parse_spoe_message); |
| 2981 | |
| 2982 | /* Parse SPOE filter configuration file */ |
| 2983 | curengine = engine; |
| 2984 | curproxy = px; |
| 2985 | curagent = NULL; |
| 2986 | curmsg = NULL; |
| 2987 | ret = readcfgfile(file); |
| 2988 | curproxy = NULL; |
| 2989 | |
| 2990 | /* unregister SPOE sections and restore previous sections */ |
| 2991 | cfg_unregister_sections(); |
| 2992 | cfg_restore_sections(&backup_sections); |
| 2993 | |
| 2994 | if (ret == -1) { |
| 2995 | memprintf(err, "Could not open configuration file %s : %s", |
| 2996 | file, strerror(errno)); |
| 2997 | goto error; |
| 2998 | } |
| 2999 | if (ret & (ERR_ABORT|ERR_FATAL)) { |
| 3000 | memprintf(err, "Error(s) found in configuration file %s", file); |
| 3001 | goto error; |
| 3002 | } |
| 3003 | |
| 3004 | /* Check SPOE agent */ |
| 3005 | if (curagent == NULL) { |
| 3006 | memprintf(err, "No SPOE agent found in file %s", file); |
| 3007 | goto error; |
| 3008 | } |
| 3009 | if (curagent->b.name == NULL) { |
| 3010 | memprintf(err, "No backend declared for SPOE agent '%s' declared at %s:%d", |
| 3011 | curagent->id, curagent->conf.file, curagent->conf.line); |
| 3012 | goto error; |
| 3013 | } |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 3014 | if (curagent->timeout.hello == TICK_ETERNITY || |
| 3015 | curagent->timeout.idle == TICK_ETERNITY || |
Christopher Faulet | f7a3092 | 2016-11-10 15:04:51 +0100 | [diff] [blame] | 3016 | curagent->timeout.processing == TICK_ETERNITY) { |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 3017 | Warning("Proxy '%s': missing timeouts for SPOE agent '%s' declare at %s:%d.\n" |
| 3018 | " | While not properly invalid, you will certainly encounter various problems\n" |
| 3019 | " | with such a configuration. To fix this, please ensure that all following\n" |
Christopher Faulet | 03a3449 | 2016-11-19 16:47:56 +0100 | [diff] [blame] | 3020 | " | timeouts are set to a non-zero value: 'hello', 'idle', 'processing'.\n", |
Christopher Faulet | f7e4e7e | 2016-10-27 22:29:49 +0200 | [diff] [blame] | 3021 | px->id, curagent->id, curagent->conf.file, curagent->conf.line); |
| 3022 | } |
| 3023 | if (curagent->var_pfx == NULL) { |
| 3024 | char *tmp = curagent->id; |
| 3025 | |
| 3026 | while (*tmp) { |
| 3027 | if (!isalnum(*tmp) && *tmp != '_' && *tmp != '.') { |
| 3028 | memprintf(err, "Invalid variable prefix '%s' for SPOE agent '%s' declared at %s:%d. " |
| 3029 | "Use 'option var-prefix' to set it. Only [a-zA-Z0-9_.] chars are supported.\n", |
| 3030 | curagent->id, curagent->id, curagent->conf.file, curagent->conf.line); |
| 3031 | goto error; |
| 3032 | } |
| 3033 | tmp++; |
| 3034 | } |
| 3035 | curagent->var_pfx = strdup(curagent->id); |
| 3036 | } |
| 3037 | |
| 3038 | if (LIST_ISEMPTY(&curmps)) { |
| 3039 | Warning("Proxy '%s': No message used by SPOE agent '%s' declared at %s:%d.\n", |
| 3040 | px->id, curagent->id, curagent->conf.file, curagent->conf.line); |
| 3041 | goto finish; |
| 3042 | } |
| 3043 | |
| 3044 | list_for_each_entry_safe(mp, mpback, &curmps, list) { |
| 3045 | list_for_each_entry_safe(msg, msgback, &curmsgs, list) { |
| 3046 | if (!strcmp(msg->id, mp->id)) { |
| 3047 | if ((px->cap & (PR_CAP_FE|PR_CAP_BE)) == (PR_CAP_FE|PR_CAP_BE)) { |
| 3048 | if (msg->event == SPOE_EV_ON_TCP_REQ_BE) |
| 3049 | msg->event = SPOE_EV_ON_TCP_REQ_FE; |
| 3050 | if (msg->event == SPOE_EV_ON_HTTP_REQ_BE) |
| 3051 | msg->event = SPOE_EV_ON_HTTP_REQ_FE; |
| 3052 | } |
| 3053 | if (!(px->cap & PR_CAP_FE) && (msg->event == SPOE_EV_ON_CLIENT_SESS || |
| 3054 | msg->event == SPOE_EV_ON_TCP_REQ_FE || |
| 3055 | msg->event == SPOE_EV_ON_HTTP_REQ_FE)) { |
| 3056 | Warning("Proxy '%s': frontend event used on a backend proxy at %s:%d.\n", |
| 3057 | px->id, msg->conf.file, msg->conf.line); |
| 3058 | goto next; |
| 3059 | } |
| 3060 | if (msg->event == SPOE_EV_NONE) { |
| 3061 | Warning("Proxy '%s': Ignore SPOE message without event at %s:%d.\n", |
| 3062 | px->id, msg->conf.file, msg->conf.line); |
| 3063 | goto next; |
| 3064 | } |
| 3065 | msg->agent = curagent; |
| 3066 | LIST_DEL(&msg->list); |
| 3067 | LIST_ADDQ(&curagent->messages[msg->event], &msg->list); |
| 3068 | goto next; |
| 3069 | } |
| 3070 | } |
| 3071 | memprintf(err, "SPOE agent '%s' try to use undefined SPOE message '%s' at %s:%d", |
| 3072 | curagent->id, mp->id, curagent->conf.file, curagent->conf.line); |
| 3073 | goto error; |
| 3074 | next: |
| 3075 | continue; |
| 3076 | } |
| 3077 | |
| 3078 | finish: |
| 3079 | conf->agent = curagent; |
| 3080 | list_for_each_entry_safe(mp, mpback, &curmps, list) { |
| 3081 | LIST_DEL(&mp->list); |
| 3082 | release_spoe_msg_placeholder(mp); |
| 3083 | } |
| 3084 | list_for_each_entry_safe(msg, msgback, &curmsgs, list) { |
| 3085 | Warning("Proxy '%s': Ignore unused SPOE messages '%s' declared at %s:%d.\n", |
| 3086 | px->id, msg->id, msg->conf.file, msg->conf.line); |
| 3087 | LIST_DEL(&msg->list); |
| 3088 | release_spoe_message(msg); |
| 3089 | } |
| 3090 | |
| 3091 | *cur_arg = pos; |
| 3092 | fconf->ops = &spoe_ops; |
| 3093 | fconf->conf = conf; |
| 3094 | return 0; |
| 3095 | |
| 3096 | error: |
| 3097 | release_spoe_agent(curagent); |
| 3098 | list_for_each_entry_safe(mp, mpback, &curmps, list) { |
| 3099 | LIST_DEL(&mp->list); |
| 3100 | release_spoe_msg_placeholder(mp); |
| 3101 | } |
| 3102 | list_for_each_entry_safe(msg, msgback, &curmsgs, list) { |
| 3103 | LIST_DEL(&msg->list); |
| 3104 | release_spoe_message(msg); |
| 3105 | } |
| 3106 | free(conf); |
| 3107 | return -1; |
| 3108 | } |
| 3109 | |
| 3110 | |
| 3111 | /* Declare the filter parser for "spoe" keyword */ |
| 3112 | static struct flt_kw_list flt_kws = { "SPOE", { }, { |
| 3113 | { "spoe", parse_spoe_flt, NULL }, |
| 3114 | { NULL, NULL, NULL }, |
| 3115 | } |
| 3116 | }; |
| 3117 | |
| 3118 | __attribute__((constructor)) |
| 3119 | static void __spoe_init(void) |
| 3120 | { |
| 3121 | flt_register_keywords(&flt_kws); |
| 3122 | |
| 3123 | LIST_INIT(&curmsgs); |
| 3124 | LIST_INIT(&curmps); |
| 3125 | pool2_spoe_ctx = create_pool("spoe_ctx", sizeof(struct spoe_context), MEM_F_SHARED); |
| 3126 | } |
| 3127 | |
| 3128 | __attribute__((destructor)) |
| 3129 | static void |
| 3130 | __spoe_deinit(void) |
| 3131 | { |
| 3132 | pool_destroy2(pool2_spoe_ctx); |
| 3133 | } |