Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 1 | /* |
| 2 | * HTTP/2 mux-demux for connections |
| 3 | * |
| 4 | * Copyright 2017 Willy Tarreau <w@1wt.eu> |
| 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 | |
| 13 | #include <common/cfgparse.h> |
| 14 | #include <common/config.h> |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 15 | #include <common/h2.h> |
| 16 | #include <common/hpack-tbl.h> |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame^] | 17 | #include <proto/applet.h> |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 18 | #include <proto/connection.h> |
| 19 | #include <proto/stream.h> |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 20 | #include <eb32tree.h> |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 21 | |
| 22 | |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 23 | /* the h2c connection pool */ |
| 24 | static struct pool_head *pool2_h2c; |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 25 | /* the h2s stream pool */ |
| 26 | static struct pool_head *pool2_h2s; |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 27 | |
| 28 | /* Connection flags (32 bit), in h2c->flags */ |
| 29 | #define H2_CF_NONE 0x00000000 |
| 30 | |
| 31 | /* H2 connection state, in h2c->st0 */ |
| 32 | enum h2_cs { |
| 33 | H2_CS_PREFACE, // init done, waiting for connection preface |
| 34 | H2_CS_SETTINGS1, // preface OK, waiting for first settings frame |
| 35 | H2_CS_FRAME_H, // first settings frame ok, waiting for frame header |
| 36 | H2_CS_FRAME_P, // frame header OK, waiting for frame payload |
| 37 | H2_CS_FRAME_A, // frame payload OK, trying to send ACK/RST frame |
| 38 | H2_CS_ERROR, // send GOAWAY(errcode) and close the connection ASAP |
| 39 | H2_CS_ERROR2, // GOAWAY(errcode) sent, close the connection ASAP |
| 40 | H2_CS_ENTRIES // must be last |
| 41 | } __attribute__((packed)); |
| 42 | |
| 43 | /* H2 connection descriptor */ |
| 44 | struct h2c { |
| 45 | struct connection *conn; |
| 46 | |
| 47 | enum h2_cs st0; /* mux state */ |
| 48 | enum h2_err errcode; /* H2 err code (H2_ERR_*) */ |
| 49 | |
| 50 | /* 16 bit hole here */ |
| 51 | uint32_t flags; /* connection flags: H2_CF_* */ |
| 52 | int32_t max_id; /* highest ID known on this connection, <0 before preface */ |
| 53 | uint32_t rcvd_c; /* newly received data to ACK for the connection */ |
| 54 | uint32_t rcvd_s; /* newly received data to ACK for the current stream (dsi) */ |
| 55 | |
| 56 | /* states for the demux direction */ |
| 57 | struct hpack_dht *ddht; /* demux dynamic header table */ |
| 58 | struct buffer *dbuf; /* demux buffer */ |
| 59 | |
| 60 | int32_t dsi; /* demux stream ID (<0 = idle) */ |
| 61 | int32_t dfl; /* demux frame length (if dsi >= 0) */ |
| 62 | int8_t dft; /* demux frame type (if dsi >= 0) */ |
| 63 | int8_t dff; /* demux frame flags (if dsi >= 0) */ |
| 64 | /* 16 bit hole here */ |
| 65 | int32_t last_sid; /* last processed stream ID for GOAWAY, <0 before preface */ |
| 66 | |
| 67 | /* states for the mux direction */ |
| 68 | struct buffer *mbuf; /* mux buffer */ |
| 69 | int32_t msi; /* mux stream ID (<0 = idle) */ |
| 70 | int32_t mfl; /* mux frame length (if dsi >= 0) */ |
| 71 | int8_t mft; /* mux frame type (if dsi >= 0) */ |
| 72 | int8_t mff; /* mux frame flags (if dsi >= 0) */ |
| 73 | /* 16 bit hole here */ |
| 74 | int32_t miw; /* mux initial window size for all new streams */ |
| 75 | int32_t mws; /* mux window size. Can be negative. */ |
| 76 | int32_t mfs; /* mux's max frame size */ |
| 77 | |
| 78 | struct eb_root streams_by_id; /* all active streams by their ID */ |
| 79 | struct list send_list; /* list of blocked streams requesting to send */ |
| 80 | struct list fctl_list; /* list of streams blocked by connection's fctl */ |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame^] | 81 | struct buffer_wait dbuf_wait; /* wait list for demux buffer allocation */ |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 82 | }; |
| 83 | |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 84 | /* H2 stream state, in h2s->st */ |
| 85 | enum h2_ss { |
| 86 | H2_SS_IDLE = 0, // idle |
| 87 | H2_SS_RLOC, // reserved(local) |
| 88 | H2_SS_RREM, // reserved(remote) |
| 89 | H2_SS_OPEN, // open |
| 90 | H2_SS_HREM, // half-closed(remote) |
| 91 | H2_SS_HLOC, // half-closed(local) |
Willy Tarreau | 96060ba | 2017-10-16 18:34:34 +0200 | [diff] [blame] | 92 | H2_SS_ERROR, // an error needs to be sent using RST_STREAM |
| 93 | H2_SS_RESET, // closed after sending RST_STREAM |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 94 | H2_SS_CLOSED, // closed |
| 95 | H2_SS_ENTRIES // must be last |
| 96 | } __attribute__((packed)); |
| 97 | |
| 98 | /* HTTP/2 stream flags (32 bit), in h2s->flags */ |
| 99 | #define H2_SF_NONE 0x00000000 |
| 100 | #define H2_SF_ES_RCVD 0x00000001 |
| 101 | #define H2_SF_ES_SENT 0x00000002 |
| 102 | |
| 103 | #define H2_SF_RST_RCVD 0x00000004 // received RST_STREAM |
| 104 | #define H2_SF_RST_SENT 0x00000008 // sent RST_STREAM |
| 105 | |
| 106 | /* H2 stream descriptor, describing the stream as it appears in the H2C, and as |
| 107 | * it is being processed in the internal HTTP representation (H1 for now). |
| 108 | */ |
| 109 | struct h2s { |
| 110 | struct conn_stream *cs; |
| 111 | struct h2c *h2c; |
| 112 | struct h1m req, res; /* request and response parser state for H1 */ |
| 113 | struct eb32_node by_id; /* place in h2c's streams_by_id */ |
| 114 | struct list list; /* position in active/blocked lists if blocked>0 */ |
| 115 | int32_t id; /* stream ID */ |
| 116 | uint32_t flags; /* H2_SF_* */ |
| 117 | int mws; /* mux window size for this stream */ |
| 118 | enum h2_err errcode; /* H2 err code (H2_ERR_*) */ |
| 119 | enum h2_ss st; |
| 120 | }; |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 121 | |
Willy Tarreau | c640514 | 2017-09-21 20:23:50 +0200 | [diff] [blame] | 122 | /* descriptor for an h2 frame header */ |
| 123 | struct h2_fh { |
| 124 | uint32_t len; /* length, host order, 24 bits */ |
| 125 | uint32_t sid; /* stream id, host order, 31 bits */ |
| 126 | uint8_t ft; /* frame type */ |
| 127 | uint8_t ff; /* frame flags */ |
| 128 | }; |
| 129 | |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 130 | /* a few settings from the global section */ |
| 131 | static int h2_settings_header_table_size = 4096; /* initial value */ |
Willy Tarreau | e6baec0 | 2017-07-27 11:45:11 +0200 | [diff] [blame] | 132 | static int h2_settings_initial_window_size = 65535; /* initial value */ |
Willy Tarreau | 5242ef8 | 2017-07-27 11:47:28 +0200 | [diff] [blame] | 133 | static int h2_settings_max_concurrent_streams = 100; |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 134 | |
| 135 | |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame^] | 136 | /*****************************************************/ |
| 137 | /* functions below are for dynamic buffer management */ |
| 138 | /*****************************************************/ |
| 139 | |
| 140 | /* re-enables receiving on mux <target> after a buffer was allocated. It returns |
| 141 | * 1 if the allocation succeeds, in which case the connection is woken up, or 0 |
| 142 | * if it's impossible to wake up and we prefer to be woken up later. |
| 143 | */ |
| 144 | static int h2_dbuf_available(void *target) |
| 145 | { |
| 146 | struct h2c *h2c = target; |
| 147 | |
| 148 | /* take the buffer now as we'll get scheduled waiting for ->wake() */ |
| 149 | if (b_alloc_margin(&h2c->dbuf, 0)) { |
| 150 | conn_xprt_want_recv(h2c->conn); |
| 151 | return 1; |
| 152 | } |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | static inline struct buffer *h2_get_dbuf(struct h2c *h2c) |
| 157 | { |
| 158 | struct buffer *buf = NULL; |
| 159 | |
| 160 | if (likely(LIST_ISEMPTY(&h2c->dbuf_wait.list)) && |
| 161 | unlikely((buf = b_alloc_margin(&h2c->dbuf, 0)) == NULL)) { |
| 162 | h2c->dbuf_wait.target = h2c->conn; |
| 163 | h2c->dbuf_wait.wakeup_cb = h2_dbuf_available; |
| 164 | SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock); |
| 165 | LIST_ADDQ(&buffer_wq, &h2c->dbuf_wait.list); |
| 166 | SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock); |
| 167 | __conn_xprt_stop_recv(h2c->conn); |
| 168 | } |
| 169 | return buf; |
| 170 | } |
| 171 | |
| 172 | static inline void h2_release_dbuf(struct h2c *h2c) |
| 173 | { |
| 174 | if (h2c->dbuf->size) { |
| 175 | b_free(&h2c->dbuf); |
| 176 | offer_buffers(h2c->dbuf_wait.target, |
| 177 | tasks_run_queue + applets_active_queue); |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 182 | /*****************************************************************/ |
| 183 | /* functions below are dedicated to the mux setup and management */ |
| 184 | /*****************************************************************/ |
| 185 | |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 186 | /* tries to initialize the inbound h2c mux. Returns < 0 in case of failure. */ |
| 187 | static int h2c_frt_init(struct connection *conn) |
| 188 | { |
| 189 | struct h2c *h2c; |
| 190 | |
| 191 | h2c = pool_alloc2(pool2_h2c); |
| 192 | if (!h2c) |
| 193 | goto fail; |
| 194 | |
| 195 | h2c->ddht = hpack_dht_alloc(h2_settings_header_table_size); |
| 196 | if (!h2c->ddht) |
| 197 | goto fail; |
| 198 | |
| 199 | /* Initialise the context. */ |
| 200 | h2c->st0 = H2_CS_PREFACE; |
| 201 | h2c->conn = conn; |
| 202 | h2c->max_id = -1; |
| 203 | h2c->errcode = H2_ERR_NO_ERROR; |
| 204 | h2c->flags = H2_CF_NONE; |
| 205 | h2c->rcvd_c = 0; |
| 206 | h2c->rcvd_s = 0; |
| 207 | |
| 208 | h2c->dbuf = &buf_empty; |
| 209 | h2c->dsi = -1; |
| 210 | h2c->msi = -1; |
| 211 | h2c->last_sid = -1; |
| 212 | |
| 213 | h2c->mbuf = &buf_empty; |
| 214 | h2c->miw = 65535; /* mux initial window size */ |
| 215 | h2c->mws = 65535; /* mux window size */ |
| 216 | h2c->mfs = 16384; /* initial max frame size */ |
| 217 | h2c->streams_by_id = EB_ROOT_UNIQUE; |
| 218 | LIST_INIT(&h2c->send_list); |
| 219 | LIST_INIT(&h2c->fctl_list); |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame^] | 220 | LIST_INIT(&h2c->dbuf_wait.list); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 221 | conn->mux_ctx = h2c; |
| 222 | |
| 223 | conn_xprt_want_recv(conn); |
| 224 | /* mux->wake will be called soon to complete the operation */ |
| 225 | return 0; |
| 226 | fail: |
| 227 | pool_free2(pool2_h2c, h2c); |
| 228 | return -1; |
| 229 | } |
| 230 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 231 | /* Initialize the mux once it's attached. For outgoing connections, the context |
| 232 | * is already initialized before installing the mux, so we detect incoming |
| 233 | * connections from the fact that the context is still NULL. Returns < 0 on |
| 234 | * error. |
| 235 | */ |
| 236 | static int h2_init(struct connection *conn) |
| 237 | { |
| 238 | if (conn->mux_ctx) { |
| 239 | /* we don't support outgoing connections for now */ |
| 240 | return -1; |
| 241 | } |
| 242 | |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 243 | return h2c_frt_init(conn); |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | /* release function for a connection. This one should be called to free all |
| 247 | * resources allocated to the mux. |
| 248 | */ |
| 249 | static void h2_release(struct connection *conn) |
| 250 | { |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 251 | struct h2c *h2c = conn->mux_ctx; |
| 252 | |
| 253 | LIST_DEL(&conn->list); |
| 254 | |
| 255 | if (h2c) { |
| 256 | hpack_dht_free(h2c->ddht); |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame^] | 257 | h2_release_dbuf(h2c); |
| 258 | SPIN_LOCK(BUF_WQ_LOCK, &buffer_wq_lock); |
| 259 | LIST_DEL(&h2c->dbuf_wait.list); |
| 260 | SPIN_UNLOCK(BUF_WQ_LOCK, &buffer_wq_lock); |
Willy Tarreau | 32218eb | 2017-09-22 08:07:25 +0200 | [diff] [blame] | 261 | pool_free2(pool2_h2c, h2c); |
| 262 | } |
| 263 | |
| 264 | conn->mux = NULL; |
| 265 | conn->mux_ctx = NULL; |
| 266 | |
| 267 | conn_stop_tracking(conn); |
| 268 | conn_full_close(conn); |
| 269 | if (conn->destroy_cb) |
| 270 | conn->destroy_cb(conn); |
| 271 | conn_free(conn); |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | |
| 275 | /*********************************************************/ |
| 276 | /* functions below are I/O callbacks from the connection */ |
| 277 | /*********************************************************/ |
| 278 | |
| 279 | /* callback called on recv event by the connection handler */ |
| 280 | static void h2_recv(struct connection *conn) |
| 281 | { |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 282 | struct h2c *h2c = conn->mux_ctx; |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame^] | 283 | struct buffer *buf; |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 284 | int max; |
| 285 | |
| 286 | if (conn->flags & CO_FL_ERROR) |
| 287 | goto error; |
| 288 | |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame^] | 289 | buf = h2_get_dbuf(h2c); |
| 290 | if (!buf) |
| 291 | return; |
| 292 | |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 293 | /* note: buf->o == 0 */ |
| 294 | max = buf->size - buf->i; |
| 295 | if (!max) { |
| 296 | /* FIXME: buffer full, add a flag, stop polling and wait */ |
| 297 | __conn_xprt_stop_recv(conn); |
| 298 | return; |
| 299 | } |
| 300 | |
| 301 | conn->xprt->rcv_buf(conn, buf, max); |
| 302 | if (conn->flags & CO_FL_ERROR) |
| 303 | goto error; |
| 304 | |
Willy Tarreau | 35dbd5d | 2017-09-22 09:13:49 +0200 | [diff] [blame^] | 305 | if (!buf->i) |
| 306 | h2_release_dbuf(h2c); |
| 307 | |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 308 | if (buf->i == buf->size) { |
| 309 | /* buffer now full */ |
| 310 | __conn_xprt_stop_recv(conn); |
| 311 | return; |
| 312 | } |
| 313 | |
| 314 | /* FIXME: should we try to process streams here instead of doing it in ->wake ? */ |
| 315 | |
| 316 | if (conn_xprt_read0_pending(conn)) |
| 317 | __conn_xprt_stop_recv(conn); |
| 318 | return; |
| 319 | |
| 320 | error: |
| 321 | __conn_xprt_stop_recv(conn); |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | /* callback called on send event by the connection handler */ |
| 325 | static void h2_send(struct connection *conn) |
| 326 | { |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 327 | struct h2c *h2c = conn->mux_ctx; |
| 328 | |
| 329 | /* FIXME: should we try to process pending streams here instead of doing it in ->wake ? */ |
| 330 | |
| 331 | if (conn->flags & CO_FL_ERROR) |
| 332 | goto error; |
| 333 | |
| 334 | if (conn->flags & (CO_FL_HANDSHAKE|CO_FL_WAIT_L4_CONN|CO_FL_WAIT_L6_CONN)) { |
| 335 | /* a handshake was requested */ |
| 336 | return; |
| 337 | } |
| 338 | |
| 339 | if (!h2c->mbuf->o) { |
| 340 | /* nothing to send */ |
| 341 | goto done; |
| 342 | } |
| 343 | |
| 344 | if (conn->flags & CO_FL_SOCK_WR_SH) { |
| 345 | /* output closed, nothing to send, clear the buffer to release it */ |
| 346 | h2c->mbuf->o = 0; |
| 347 | goto done; |
| 348 | } |
| 349 | |
| 350 | /* pending response data, we need to try to send or subscribe to |
| 351 | * writes. The snd_buf() function takes a "flags" argument which |
| 352 | * may be made of a combination of CO_SFL_MSG_MORE to indicate |
| 353 | * that more data immediately comes and CO_SFL_STREAMER to |
| 354 | * indicate that the connection is streaming lots of data (used |
| 355 | * to increase TLS record size at the expense of latency). The |
| 356 | * former could be sent any time there's a buffer full flag, as |
| 357 | * it indicates at least one stream attempted to send and failed |
| 358 | * so there are pending data. And alternative would be to set it |
| 359 | * as long as there's an active stream but that would be |
| 360 | * problematic for ACKs. The latter should possibly not be set |
| 361 | * for now. |
| 362 | */ |
| 363 | conn->xprt->snd_buf(conn, h2c->mbuf, 0); |
| 364 | |
| 365 | if (conn->flags & CO_FL_ERROR) |
| 366 | goto error; |
| 367 | |
| 368 | if (h2c->mbuf->o) { |
| 369 | /* incomplete send, the snd_buf callback has already updated |
| 370 | * the connection flags. |
| 371 | * |
| 372 | * FIXME: we should arm a send timeout here |
| 373 | */ |
| 374 | __conn_xprt_want_send(conn); |
| 375 | return; |
| 376 | } |
| 377 | |
| 378 | done: |
| 379 | /* FIXME: release the output buffer when empty or do it in ->wake() ? */ |
| 380 | __conn_xprt_stop_send(conn); |
| 381 | return; |
| 382 | |
| 383 | error: |
| 384 | /* FIXME: report an error somewhere in the mux */ |
| 385 | __conn_xprt_stop_send(conn); |
| 386 | return; |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | /* callback called on any event by the connection handler. |
| 390 | * It applies changes and returns zero, or < 0 if it wants immediate |
| 391 | * destruction of the connection (which normally doesn not happen in h2). |
| 392 | */ |
| 393 | static int h2_wake(struct connection *conn) |
| 394 | { |
Willy Tarreau | a2af512 | 2017-10-09 11:56:46 +0200 | [diff] [blame] | 395 | struct h2c *h2c = conn->mux_ctx; |
| 396 | |
| 397 | if ((conn->flags & CO_FL_ERROR) && eb_is_empty(&h2c->streams_by_id)) { |
| 398 | h2_release(conn); |
| 399 | return -1; |
| 400 | } |
| 401 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | /*******************************************/ |
| 406 | /* functions below are used by the streams */ |
| 407 | /*******************************************/ |
| 408 | |
| 409 | /* |
| 410 | * Attach a new stream to a connection |
| 411 | * (Used for outgoing connections) |
| 412 | */ |
| 413 | static struct conn_stream *h2_attach(struct connection *conn) |
| 414 | { |
| 415 | return NULL; |
| 416 | } |
| 417 | |
| 418 | /* callback used to update the mux's polling flags after changing a cs' status. |
| 419 | * The caller (cs_update_mux_polling) will take care of propagating any changes |
| 420 | * to the transport layer. |
| 421 | */ |
| 422 | static void h2_update_poll(struct conn_stream *cs) |
| 423 | { |
| 424 | } |
| 425 | |
| 426 | /* |
| 427 | * Detach the stream from the connection and possibly release the connection. |
| 428 | */ |
| 429 | static void h2_detach(struct conn_stream *cs) |
| 430 | { |
| 431 | } |
| 432 | |
| 433 | static void h2_shutr(struct conn_stream *cs, enum cs_shr_mode mode) |
| 434 | { |
| 435 | } |
| 436 | |
| 437 | static void h2_shutw(struct conn_stream *cs, enum cs_shw_mode mode) |
| 438 | { |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * Called from the upper layer, to get more data |
| 443 | */ |
| 444 | static int h2_rcv_buf(struct conn_stream *cs, struct buffer *buf, int count) |
| 445 | { |
| 446 | /* FIXME: not handled for now */ |
| 447 | cs->flags |= CS_FL_ERROR; |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | /* Called from the upper layer, to send data */ |
| 452 | static int h2_snd_buf(struct conn_stream *cs, struct buffer *buf, int flags) |
| 453 | { |
| 454 | /* FIXME: not handled for now */ |
| 455 | cs->flags |= CS_FL_ERROR; |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | |
| 460 | /*******************************************************/ |
| 461 | /* functions below are dedicated to the config parsers */ |
| 462 | /*******************************************************/ |
| 463 | |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 464 | /* config parser for global "tune.h2.header-table-size" */ |
| 465 | static int h2_parse_header_table_size(char **args, int section_type, struct proxy *curpx, |
| 466 | struct proxy *defpx, const char *file, int line, |
| 467 | char **err) |
| 468 | { |
| 469 | if (too_many_args(1, args, err, NULL)) |
| 470 | return -1; |
| 471 | |
| 472 | h2_settings_header_table_size = atoi(args[1]); |
| 473 | if (h2_settings_header_table_size < 4096 || h2_settings_header_table_size > 65536) { |
| 474 | memprintf(err, "'%s' expects a numeric value between 4096 and 65536.", args[0]); |
| 475 | return -1; |
| 476 | } |
| 477 | return 0; |
| 478 | } |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 479 | |
Willy Tarreau | e6baec0 | 2017-07-27 11:45:11 +0200 | [diff] [blame] | 480 | /* config parser for global "tune.h2.initial-window-size" */ |
| 481 | static int h2_parse_initial_window_size(char **args, int section_type, struct proxy *curpx, |
| 482 | struct proxy *defpx, const char *file, int line, |
| 483 | char **err) |
| 484 | { |
| 485 | if (too_many_args(1, args, err, NULL)) |
| 486 | return -1; |
| 487 | |
| 488 | h2_settings_initial_window_size = atoi(args[1]); |
| 489 | if (h2_settings_initial_window_size < 0) { |
| 490 | memprintf(err, "'%s' expects a positive numeric value.", args[0]); |
| 491 | return -1; |
| 492 | } |
| 493 | return 0; |
| 494 | } |
| 495 | |
Willy Tarreau | 5242ef8 | 2017-07-27 11:47:28 +0200 | [diff] [blame] | 496 | /* config parser for global "tune.h2.max-concurrent-streams" */ |
| 497 | static int h2_parse_max_concurrent_streams(char **args, int section_type, struct proxy *curpx, |
| 498 | struct proxy *defpx, const char *file, int line, |
| 499 | char **err) |
| 500 | { |
| 501 | if (too_many_args(1, args, err, NULL)) |
| 502 | return -1; |
| 503 | |
| 504 | h2_settings_max_concurrent_streams = atoi(args[1]); |
| 505 | if (h2_settings_max_concurrent_streams < 0) { |
| 506 | memprintf(err, "'%s' expects a positive numeric value.", args[0]); |
| 507 | return -1; |
| 508 | } |
| 509 | return 0; |
| 510 | } |
| 511 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 512 | |
| 513 | /****************************************/ |
| 514 | /* MUX initialization and instanciation */ |
| 515 | /***************************************/ |
| 516 | |
| 517 | /* The mux operations */ |
| 518 | const struct mux_ops h2_ops = { |
| 519 | .init = h2_init, |
| 520 | .recv = h2_recv, |
| 521 | .send = h2_send, |
| 522 | .wake = h2_wake, |
| 523 | .update_poll = h2_update_poll, |
| 524 | .rcv_buf = h2_rcv_buf, |
| 525 | .snd_buf = h2_snd_buf, |
| 526 | .attach = h2_attach, |
| 527 | .detach = h2_detach, |
| 528 | .shutr = h2_shutr, |
| 529 | .shutw = h2_shutw, |
| 530 | .release = h2_release, |
| 531 | .name = "H2", |
| 532 | }; |
| 533 | |
| 534 | /* ALPN selection : this mux registers ALPN tolen "h2" */ |
| 535 | static struct alpn_mux_list alpn_mux_h2 = |
| 536 | { .token = IST("h2"), .mode = ALPN_MODE_HTTP, .mux = &h2_ops }; |
| 537 | |
| 538 | /* config keyword parsers */ |
| 539 | static struct cfg_kw_list cfg_kws = {ILH, { |
Willy Tarreau | fe20e5b | 2017-07-27 11:42:14 +0200 | [diff] [blame] | 540 | { CFG_GLOBAL, "tune.h2.header-table-size", h2_parse_header_table_size }, |
Willy Tarreau | e6baec0 | 2017-07-27 11:45:11 +0200 | [diff] [blame] | 541 | { CFG_GLOBAL, "tune.h2.initial-window-size", h2_parse_initial_window_size }, |
Willy Tarreau | 5242ef8 | 2017-07-27 11:47:28 +0200 | [diff] [blame] | 542 | { CFG_GLOBAL, "tune.h2.max-concurrent-streams", h2_parse_max_concurrent_streams }, |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 543 | { 0, NULL, NULL } |
| 544 | }}; |
| 545 | |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 546 | static void __h2_deinit(void) |
| 547 | { |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 548 | pool_destroy2(pool2_h2s); |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 549 | pool_destroy2(pool2_h2c); |
| 550 | } |
| 551 | |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 552 | __attribute__((constructor)) |
| 553 | static void __h2_init(void) |
| 554 | { |
| 555 | alpn_register_mux(&alpn_mux_h2); |
| 556 | cfg_register_keywords(&cfg_kws); |
Willy Tarreau | 5ab6b57 | 2017-09-22 08:05:00 +0200 | [diff] [blame] | 557 | hap_register_post_deinit(__h2_deinit); |
| 558 | pool2_h2c = create_pool("h2c", sizeof(struct h2c), MEM_F_SHARED); |
Willy Tarreau | 1831264 | 2017-10-11 07:57:07 +0200 | [diff] [blame] | 559 | pool2_h2s = create_pool("h2s", sizeof(struct h2s), MEM_F_SHARED); |
Willy Tarreau | 62f5269 | 2017-10-08 23:01:42 +0200 | [diff] [blame] | 560 | } |