Annotation of embedaddon/curl/lib/http2.c, revision 1.1
1.1 ! misho 1: /***************************************************************************
! 2: * _ _ ____ _
! 3: * Project ___| | | | _ \| |
! 4: * / __| | | | |_) | |
! 5: * | (__| |_| | _ <| |___
! 6: * \___|\___/|_| \_\_____|
! 7: *
! 8: * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
! 9: *
! 10: * This software is licensed as described in the file COPYING, which
! 11: * you should have received as part of this distribution. The terms
! 12: * are also available at https://curl.haxx.se/docs/copyright.html.
! 13: *
! 14: * You may opt to use, copy, modify, merge, publish, distribute and/or sell
! 15: * copies of the Software, and permit persons to whom the Software is
! 16: * furnished to do so, under the terms of the COPYING file.
! 17: *
! 18: * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
! 19: * KIND, either express or implied.
! 20: *
! 21: ***************************************************************************/
! 22:
! 23: #include "curl_setup.h"
! 24:
! 25: #ifdef USE_NGHTTP2
! 26: #include <nghttp2/nghttp2.h>
! 27: #include "urldata.h"
! 28: #include "http2.h"
! 29: #include "http.h"
! 30: #include "sendf.h"
! 31: #include "select.h"
! 32: #include "curl_base64.h"
! 33: #include "strcase.h"
! 34: #include "multiif.h"
! 35: #include "url.h"
! 36: #include "connect.h"
! 37: #include "strtoofft.h"
! 38: #include "strdup.h"
! 39: /* The last 3 #include files should be in this order */
! 40: #include "curl_printf.h"
! 41: #include "curl_memory.h"
! 42: #include "memdebug.h"
! 43:
! 44: #define H2_BUFSIZE 32768
! 45:
! 46: #if (NGHTTP2_VERSION_NUM < 0x010c00)
! 47: #error too old nghttp2 version, upgrade!
! 48: #endif
! 49:
! 50: #ifdef CURL_DISABLE_VERBOSE_STRINGS
! 51: #define nghttp2_session_callbacks_set_error_callback(x,y)
! 52: #endif
! 53:
! 54: #if (NGHTTP2_VERSION_NUM >= 0x010c00)
! 55: #define NGHTTP2_HAS_SET_LOCAL_WINDOW_SIZE 1
! 56: #endif
! 57:
! 58: #define HTTP2_HUGE_WINDOW_SIZE (32 * 1024 * 1024) /* 32 MB */
! 59:
! 60: #ifdef DEBUG_HTTP2
! 61: #define H2BUGF(x) x
! 62: #else
! 63: #define H2BUGF(x) do { } while(0)
! 64: #endif
! 65:
! 66:
! 67: static ssize_t http2_recv(struct connectdata *conn, int sockindex,
! 68: char *mem, size_t len, CURLcode *err);
! 69: static bool http2_connisdead(struct connectdata *conn);
! 70: static int h2_session_send(struct Curl_easy *data,
! 71: nghttp2_session *h2);
! 72: static int h2_process_pending_input(struct connectdata *conn,
! 73: struct http_conn *httpc,
! 74: CURLcode *err);
! 75:
! 76: /*
! 77: * Curl_http2_init_state() is called when the easy handle is created and
! 78: * allows for HTTP/2 specific init of state.
! 79: */
! 80: void Curl_http2_init_state(struct UrlState *state)
! 81: {
! 82: state->stream_weight = NGHTTP2_DEFAULT_WEIGHT;
! 83: }
! 84:
! 85: /*
! 86: * Curl_http2_init_userset() is called when the easy handle is created and
! 87: * allows for HTTP/2 specific user-set fields.
! 88: */
! 89: void Curl_http2_init_userset(struct UserDefined *set)
! 90: {
! 91: set->stream_weight = NGHTTP2_DEFAULT_WEIGHT;
! 92: }
! 93:
! 94: static int http2_perform_getsock(const struct connectdata *conn,
! 95: curl_socket_t *sock)
! 96: {
! 97: const struct http_conn *c = &conn->proto.httpc;
! 98: struct SingleRequest *k = &conn->data->req;
! 99: int bitmap = GETSOCK_BLANK;
! 100:
! 101: sock[0] = conn->sock[FIRSTSOCKET];
! 102:
! 103: /* in a HTTP/2 connection we can basically always get a frame so we should
! 104: always be ready for one */
! 105: bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
! 106:
! 107: /* we're still uploading or the HTTP/2 layer wants to send data */
! 108: if(((k->keepon & (KEEP_SEND|KEEP_SEND_PAUSE)) == KEEP_SEND) ||
! 109: nghttp2_session_want_write(c->h2))
! 110: bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
! 111:
! 112: return bitmap;
! 113: }
! 114:
! 115: static int http2_getsock(struct connectdata *conn,
! 116: curl_socket_t *socks)
! 117: {
! 118: return http2_perform_getsock(conn, socks);
! 119: }
! 120:
! 121: /*
! 122: * http2_stream_free() free HTTP2 stream related data
! 123: */
! 124: static void http2_stream_free(struct HTTP *http)
! 125: {
! 126: if(http) {
! 127: Curl_add_buffer_free(&http->header_recvbuf);
! 128: Curl_add_buffer_free(&http->trailer_recvbuf);
! 129: for(; http->push_headers_used > 0; --http->push_headers_used) {
! 130: free(http->push_headers[http->push_headers_used - 1]);
! 131: }
! 132: free(http->push_headers);
! 133: http->push_headers = NULL;
! 134: }
! 135: }
! 136:
! 137: /*
! 138: * Disconnects *a* connection used for HTTP/2. It might be an old one from the
! 139: * connection cache and not the "main" one. Don't touch the easy handle!
! 140: */
! 141:
! 142: static CURLcode http2_disconnect(struct connectdata *conn,
! 143: bool dead_connection)
! 144: {
! 145: struct http_conn *c = &conn->proto.httpc;
! 146: (void)dead_connection;
! 147:
! 148: H2BUGF(infof(conn->data, "HTTP/2 DISCONNECT starts now\n"));
! 149:
! 150: nghttp2_session_del(c->h2);
! 151: Curl_safefree(c->inbuf);
! 152:
! 153: H2BUGF(infof(conn->data, "HTTP/2 DISCONNECT done\n"));
! 154:
! 155: return CURLE_OK;
! 156: }
! 157:
! 158: /*
! 159: * The server may send us data at any point (e.g. PING frames). Therefore,
! 160: * we cannot assume that an HTTP/2 socket is dead just because it is readable.
! 161: *
! 162: * Instead, if it is readable, run Curl_connalive() to peek at the socket
! 163: * and distinguish between closed and data.
! 164: */
! 165: static bool http2_connisdead(struct connectdata *conn)
! 166: {
! 167: int sval;
! 168: bool dead = TRUE;
! 169:
! 170: if(conn->bits.close)
! 171: return TRUE;
! 172:
! 173: sval = SOCKET_READABLE(conn->sock[FIRSTSOCKET], 0);
! 174: if(sval == 0) {
! 175: /* timeout */
! 176: dead = FALSE;
! 177: }
! 178: else if(sval & CURL_CSELECT_ERR) {
! 179: /* socket is in an error state */
! 180: dead = TRUE;
! 181: }
! 182: else if(sval & CURL_CSELECT_IN) {
! 183: /* readable with no error. could still be closed */
! 184: dead = !Curl_connalive(conn);
! 185: if(!dead) {
! 186: /* This happens before we've sent off a request and the connection is
! 187: not in use by any other transfer, there shouldn't be any data here,
! 188: only "protocol frames" */
! 189: CURLcode result;
! 190: struct http_conn *httpc = &conn->proto.httpc;
! 191: ssize_t nread = -1;
! 192: if(httpc->recv_underlying)
! 193: /* if called "too early", this pointer isn't setup yet! */
! 194: nread = ((Curl_recv *)httpc->recv_underlying)(
! 195: conn, FIRSTSOCKET, httpc->inbuf, H2_BUFSIZE, &result);
! 196: if(nread != -1) {
! 197: infof(conn->data,
! 198: "%d bytes stray data read before trying h2 connection\n",
! 199: (int)nread);
! 200: httpc->nread_inbuf = 0;
! 201: httpc->inbuflen = nread;
! 202: (void)h2_process_pending_input(conn, httpc, &result);
! 203: }
! 204: else
! 205: /* the read failed so let's say this is dead anyway */
! 206: dead = TRUE;
! 207: }
! 208: }
! 209:
! 210: return dead;
! 211: }
! 212:
! 213: static unsigned int http2_conncheck(struct connectdata *check,
! 214: unsigned int checks_to_perform)
! 215: {
! 216: unsigned int ret_val = CONNRESULT_NONE;
! 217: struct http_conn *c = &check->proto.httpc;
! 218: int rc;
! 219: bool send_frames = false;
! 220:
! 221: if(checks_to_perform & CONNCHECK_ISDEAD) {
! 222: if(http2_connisdead(check))
! 223: ret_val |= CONNRESULT_DEAD;
! 224: }
! 225:
! 226: if(checks_to_perform & CONNCHECK_KEEPALIVE) {
! 227: struct curltime now = Curl_now();
! 228: timediff_t elapsed = Curl_timediff(now, check->keepalive);
! 229:
! 230: if(elapsed > check->upkeep_interval_ms) {
! 231: /* Perform an HTTP/2 PING */
! 232: rc = nghttp2_submit_ping(c->h2, 0, ZERO_NULL);
! 233: if(!rc) {
! 234: /* Successfully added a PING frame to the session. Need to flag this
! 235: so the frame is sent. */
! 236: send_frames = true;
! 237: }
! 238: else {
! 239: failf(check->data, "nghttp2_submit_ping() failed: %s(%d)",
! 240: nghttp2_strerror(rc), rc);
! 241: }
! 242:
! 243: check->keepalive = now;
! 244: }
! 245: }
! 246:
! 247: if(send_frames) {
! 248: rc = nghttp2_session_send(c->h2);
! 249: if(rc)
! 250: failf(check->data, "nghttp2_session_send() failed: %s(%d)",
! 251: nghttp2_strerror(rc), rc);
! 252: }
! 253:
! 254: return ret_val;
! 255: }
! 256:
! 257: /* called from http_setup_conn */
! 258: void Curl_http2_setup_req(struct Curl_easy *data)
! 259: {
! 260: struct HTTP *http = data->req.protop;
! 261:
! 262: http->nread_header_recvbuf = 0;
! 263: http->bodystarted = FALSE;
! 264: http->status_code = -1;
! 265: http->pausedata = NULL;
! 266: http->pauselen = 0;
! 267: http->closed = FALSE;
! 268: http->close_handled = FALSE;
! 269: http->mem = data->state.buffer;
! 270: http->len = data->set.buffer_size;
! 271: http->memlen = 0;
! 272: }
! 273:
! 274: /* called from http_setup_conn */
! 275: void Curl_http2_setup_conn(struct connectdata *conn)
! 276: {
! 277: conn->proto.httpc.settings.max_concurrent_streams =
! 278: DEFAULT_MAX_CONCURRENT_STREAMS;
! 279: conn->proto.httpc.error_code = NGHTTP2_NO_ERROR;
! 280: }
! 281:
! 282: /*
! 283: * HTTP2 handler interface. This isn't added to the general list of protocols
! 284: * but will be used at run-time when the protocol is dynamically switched from
! 285: * HTTP to HTTP2.
! 286: */
! 287: static const struct Curl_handler Curl_handler_http2 = {
! 288: "HTTP", /* scheme */
! 289: ZERO_NULL, /* setup_connection */
! 290: Curl_http, /* do_it */
! 291: Curl_http_done, /* done */
! 292: ZERO_NULL, /* do_more */
! 293: ZERO_NULL, /* connect_it */
! 294: ZERO_NULL, /* connecting */
! 295: ZERO_NULL, /* doing */
! 296: http2_getsock, /* proto_getsock */
! 297: http2_getsock, /* doing_getsock */
! 298: ZERO_NULL, /* domore_getsock */
! 299: http2_perform_getsock, /* perform_getsock */
! 300: http2_disconnect, /* disconnect */
! 301: ZERO_NULL, /* readwrite */
! 302: http2_conncheck, /* connection_check */
! 303: PORT_HTTP, /* defport */
! 304: CURLPROTO_HTTP, /* protocol */
! 305: PROTOPT_STREAM /* flags */
! 306: };
! 307:
! 308: static const struct Curl_handler Curl_handler_http2_ssl = {
! 309: "HTTPS", /* scheme */
! 310: ZERO_NULL, /* setup_connection */
! 311: Curl_http, /* do_it */
! 312: Curl_http_done, /* done */
! 313: ZERO_NULL, /* do_more */
! 314: ZERO_NULL, /* connect_it */
! 315: ZERO_NULL, /* connecting */
! 316: ZERO_NULL, /* doing */
! 317: http2_getsock, /* proto_getsock */
! 318: http2_getsock, /* doing_getsock */
! 319: ZERO_NULL, /* domore_getsock */
! 320: http2_perform_getsock, /* perform_getsock */
! 321: http2_disconnect, /* disconnect */
! 322: ZERO_NULL, /* readwrite */
! 323: http2_conncheck, /* connection_check */
! 324: PORT_HTTP, /* defport */
! 325: CURLPROTO_HTTPS, /* protocol */
! 326: PROTOPT_SSL | PROTOPT_STREAM /* flags */
! 327: };
! 328:
! 329: /*
! 330: * Store nghttp2 version info in this buffer, Prefix with a space. Return
! 331: * total length written.
! 332: */
! 333: int Curl_http2_ver(char *p, size_t len)
! 334: {
! 335: nghttp2_info *h2 = nghttp2_version(0);
! 336: return msnprintf(p, len, "nghttp2/%s", h2->version_str);
! 337: }
! 338:
! 339: /*
! 340: * The implementation of nghttp2_send_callback type. Here we write |data| with
! 341: * size |length| to the network and return the number of bytes actually
! 342: * written. See the documentation of nghttp2_send_callback for the details.
! 343: */
! 344: static ssize_t send_callback(nghttp2_session *h2,
! 345: const uint8_t *data, size_t length, int flags,
! 346: void *userp)
! 347: {
! 348: struct connectdata *conn = (struct connectdata *)userp;
! 349: struct http_conn *c = &conn->proto.httpc;
! 350: ssize_t written;
! 351: CURLcode result = CURLE_OK;
! 352:
! 353: (void)h2;
! 354: (void)flags;
! 355:
! 356: if(!c->send_underlying)
! 357: /* called before setup properly! */
! 358: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 359:
! 360: written = ((Curl_send*)c->send_underlying)(conn, FIRSTSOCKET,
! 361: data, length, &result);
! 362:
! 363: if(result == CURLE_AGAIN) {
! 364: return NGHTTP2_ERR_WOULDBLOCK;
! 365: }
! 366:
! 367: if(written == -1) {
! 368: failf(conn->data, "Failed sending HTTP2 data");
! 369: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 370: }
! 371:
! 372: if(!written)
! 373: return NGHTTP2_ERR_WOULDBLOCK;
! 374:
! 375: return written;
! 376: }
! 377:
! 378:
! 379: /* We pass a pointer to this struct in the push callback, but the contents of
! 380: the struct are hidden from the user. */
! 381: struct curl_pushheaders {
! 382: struct Curl_easy *data;
! 383: const nghttp2_push_promise *frame;
! 384: };
! 385:
! 386: /*
! 387: * push header access function. Only to be used from within the push callback
! 388: */
! 389: char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num)
! 390: {
! 391: /* Verify that we got a good easy handle in the push header struct, mostly to
! 392: detect rubbish input fast(er). */
! 393: if(!h || !GOOD_EASY_HANDLE(h->data))
! 394: return NULL;
! 395: else {
! 396: struct HTTP *stream = h->data->req.protop;
! 397: if(num < stream->push_headers_used)
! 398: return stream->push_headers[num];
! 399: }
! 400: return NULL;
! 401: }
! 402:
! 403: /*
! 404: * push header access function. Only to be used from within the push callback
! 405: */
! 406: char *curl_pushheader_byname(struct curl_pushheaders *h, const char *header)
! 407: {
! 408: /* Verify that we got a good easy handle in the push header struct,
! 409: mostly to detect rubbish input fast(er). Also empty header name
! 410: is just a rubbish too. We have to allow ":" at the beginning of
! 411: the header, but header == ":" must be rejected. If we have ':' in
! 412: the middle of header, it could be matched in middle of the value,
! 413: this is because we do prefix match.*/
! 414: if(!h || !GOOD_EASY_HANDLE(h->data) || !header || !header[0] ||
! 415: !strcmp(header, ":") || strchr(header + 1, ':'))
! 416: return NULL;
! 417: else {
! 418: struct HTTP *stream = h->data->req.protop;
! 419: size_t len = strlen(header);
! 420: size_t i;
! 421: for(i = 0; i<stream->push_headers_used; i++) {
! 422: if(!strncmp(header, stream->push_headers[i], len)) {
! 423: /* sub-match, make sure that it is followed by a colon */
! 424: if(stream->push_headers[i][len] != ':')
! 425: continue;
! 426: return &stream->push_headers[i][len + 1];
! 427: }
! 428: }
! 429: }
! 430: return NULL;
! 431: }
! 432:
! 433: /*
! 434: * This specific transfer on this connection has been "drained".
! 435: */
! 436: static void drained_transfer(struct Curl_easy *data,
! 437: struct http_conn *httpc)
! 438: {
! 439: DEBUGASSERT(httpc->drain_total >= data->state.drain);
! 440: httpc->drain_total -= data->state.drain;
! 441: data->state.drain = 0;
! 442: }
! 443:
! 444: /*
! 445: * Mark this transfer to get "drained".
! 446: */
! 447: static void drain_this(struct Curl_easy *data,
! 448: struct http_conn *httpc)
! 449: {
! 450: data->state.drain++;
! 451: httpc->drain_total++;
! 452: DEBUGASSERT(httpc->drain_total >= data->state.drain);
! 453: }
! 454:
! 455: static struct Curl_easy *duphandle(struct Curl_easy *data)
! 456: {
! 457: struct Curl_easy *second = curl_easy_duphandle(data);
! 458: if(second) {
! 459: /* setup the request struct */
! 460: struct HTTP *http = calloc(1, sizeof(struct HTTP));
! 461: if(!http) {
! 462: (void)Curl_close(&second);
! 463: }
! 464: else {
! 465: second->req.protop = http;
! 466: http->header_recvbuf = Curl_add_buffer_init();
! 467: if(!http->header_recvbuf) {
! 468: free(http);
! 469: (void)Curl_close(&second);
! 470: }
! 471: else {
! 472: Curl_http2_setup_req(second);
! 473: second->state.stream_weight = data->state.stream_weight;
! 474: }
! 475: }
! 476: }
! 477: return second;
! 478: }
! 479:
! 480:
! 481: static int push_promise(struct Curl_easy *data,
! 482: struct connectdata *conn,
! 483: const nghttp2_push_promise *frame)
! 484: {
! 485: int rv;
! 486: H2BUGF(infof(data, "PUSH_PROMISE received, stream %u!\n",
! 487: frame->promised_stream_id));
! 488: if(data->multi->push_cb) {
! 489: struct HTTP *stream;
! 490: struct HTTP *newstream;
! 491: struct curl_pushheaders heads;
! 492: CURLMcode rc;
! 493: struct http_conn *httpc;
! 494: size_t i;
! 495: /* clone the parent */
! 496: struct Curl_easy *newhandle = duphandle(data);
! 497: if(!newhandle) {
! 498: infof(data, "failed to duplicate handle\n");
! 499: rv = 1; /* FAIL HARD */
! 500: goto fail;
! 501: }
! 502:
! 503: heads.data = data;
! 504: heads.frame = frame;
! 505: /* ask the application */
! 506: H2BUGF(infof(data, "Got PUSH_PROMISE, ask application!\n"));
! 507:
! 508: stream = data->req.protop;
! 509: if(!stream) {
! 510: failf(data, "Internal NULL stream!\n");
! 511: (void)Curl_close(&newhandle);
! 512: rv = 1;
! 513: goto fail;
! 514: }
! 515:
! 516: Curl_set_in_callback(data, true);
! 517: rv = data->multi->push_cb(data, newhandle,
! 518: stream->push_headers_used, &heads,
! 519: data->multi->push_userp);
! 520: Curl_set_in_callback(data, false);
! 521:
! 522: /* free the headers again */
! 523: for(i = 0; i<stream->push_headers_used; i++)
! 524: free(stream->push_headers[i]);
! 525: free(stream->push_headers);
! 526: stream->push_headers = NULL;
! 527: stream->push_headers_used = 0;
! 528:
! 529: if(rv) {
! 530: /* denied, kill off the new handle again */
! 531: http2_stream_free(newhandle->req.protop);
! 532: newhandle->req.protop = NULL;
! 533: (void)Curl_close(&newhandle);
! 534: goto fail;
! 535: }
! 536:
! 537: newstream = newhandle->req.protop;
! 538: newstream->stream_id = frame->promised_stream_id;
! 539: newhandle->req.maxdownload = -1;
! 540: newhandle->req.size = -1;
! 541:
! 542: /* approved, add to the multi handle and immediately switch to PERFORM
! 543: state with the given connection !*/
! 544: rc = Curl_multi_add_perform(data->multi, newhandle, conn);
! 545: if(rc) {
! 546: infof(data, "failed to add handle to multi\n");
! 547: http2_stream_free(newhandle->req.protop);
! 548: newhandle->req.protop = NULL;
! 549: Curl_close(&newhandle);
! 550: rv = 1;
! 551: goto fail;
! 552: }
! 553:
! 554: httpc = &conn->proto.httpc;
! 555: rv = nghttp2_session_set_stream_user_data(httpc->h2,
! 556: frame->promised_stream_id,
! 557: newhandle);
! 558: if(rv) {
! 559: infof(data, "failed to set user_data for stream %d\n",
! 560: frame->promised_stream_id);
! 561: DEBUGASSERT(0);
! 562: goto fail;
! 563: }
! 564: }
! 565: else {
! 566: H2BUGF(infof(data, "Got PUSH_PROMISE, ignore it!\n"));
! 567: rv = 1;
! 568: }
! 569: fail:
! 570: return rv;
! 571: }
! 572:
! 573: /*
! 574: * multi_connchanged() is called to tell that there is a connection in
! 575: * this multi handle that has changed state (multiplexing become possible, the
! 576: * number of allowed streams changed or similar), and a subsequent use of this
! 577: * multi handle should move CONNECT_PEND handles back to CONNECT to have them
! 578: * retry.
! 579: */
! 580: static void multi_connchanged(struct Curl_multi *multi)
! 581: {
! 582: multi->recheckstate = TRUE;
! 583: }
! 584:
! 585: static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
! 586: void *userp)
! 587: {
! 588: struct connectdata *conn = (struct connectdata *)userp;
! 589: struct http_conn *httpc = &conn->proto.httpc;
! 590: struct Curl_easy *data_s = NULL;
! 591: struct HTTP *stream = NULL;
! 592: int rv;
! 593: size_t left, ncopy;
! 594: int32_t stream_id = frame->hd.stream_id;
! 595: CURLcode result;
! 596:
! 597: if(!stream_id) {
! 598: /* stream ID zero is for connection-oriented stuff */
! 599: if(frame->hd.type == NGHTTP2_SETTINGS) {
! 600: uint32_t max_conn = httpc->settings.max_concurrent_streams;
! 601: H2BUGF(infof(conn->data, "Got SETTINGS\n"));
! 602: httpc->settings.max_concurrent_streams =
! 603: nghttp2_session_get_remote_settings(
! 604: session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS);
! 605: httpc->settings.enable_push =
! 606: nghttp2_session_get_remote_settings(
! 607: session, NGHTTP2_SETTINGS_ENABLE_PUSH);
! 608: H2BUGF(infof(conn->data, "MAX_CONCURRENT_STREAMS == %d\n",
! 609: httpc->settings.max_concurrent_streams));
! 610: H2BUGF(infof(conn->data, "ENABLE_PUSH == %s\n",
! 611: httpc->settings.enable_push?"TRUE":"false"));
! 612: if(max_conn != httpc->settings.max_concurrent_streams) {
! 613: /* only signal change if the value actually changed */
! 614: infof(conn->data,
! 615: "Connection state changed (MAX_CONCURRENT_STREAMS == %u)!\n",
! 616: httpc->settings.max_concurrent_streams);
! 617: multi_connchanged(conn->data->multi);
! 618: }
! 619: }
! 620: return 0;
! 621: }
! 622: data_s = nghttp2_session_get_stream_user_data(session, stream_id);
! 623: if(!data_s) {
! 624: H2BUGF(infof(conn->data,
! 625: "No Curl_easy associated with stream: %x\n",
! 626: stream_id));
! 627: return 0;
! 628: }
! 629:
! 630: stream = data_s->req.protop;
! 631: if(!stream) {
! 632: H2BUGF(infof(data_s, "No proto pointer for stream: %x\n",
! 633: stream_id));
! 634: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 635: }
! 636:
! 637: H2BUGF(infof(data_s, "on_frame_recv() header %x stream %x\n",
! 638: frame->hd.type, stream_id));
! 639:
! 640: switch(frame->hd.type) {
! 641: case NGHTTP2_DATA:
! 642: /* If body started on this stream, then receiving DATA is illegal. */
! 643: if(!stream->bodystarted) {
! 644: rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
! 645: stream_id, NGHTTP2_PROTOCOL_ERROR);
! 646:
! 647: if(nghttp2_is_fatal(rv)) {
! 648: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 649: }
! 650: }
! 651: break;
! 652: case NGHTTP2_HEADERS:
! 653: if(stream->bodystarted) {
! 654: /* Only valid HEADERS after body started is trailer HEADERS. We
! 655: buffer them in on_header callback. */
! 656: break;
! 657: }
! 658:
! 659: /* nghttp2 guarantees that :status is received, and we store it to
! 660: stream->status_code. Fuzzing has proven this can still be reached
! 661: without status code having been set. */
! 662: if(stream->status_code == -1)
! 663: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 664:
! 665: /* Only final status code signals the end of header */
! 666: if(stream->status_code / 100 != 1) {
! 667: stream->bodystarted = TRUE;
! 668: stream->status_code = -1;
! 669: }
! 670:
! 671: result = Curl_add_buffer(&stream->header_recvbuf, "\r\n", 2);
! 672: if(result)
! 673: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 674:
! 675: left = stream->header_recvbuf->size_used - stream->nread_header_recvbuf;
! 676: ncopy = CURLMIN(stream->len, left);
! 677:
! 678: memcpy(&stream->mem[stream->memlen],
! 679: stream->header_recvbuf->buffer + stream->nread_header_recvbuf,
! 680: ncopy);
! 681: stream->nread_header_recvbuf += ncopy;
! 682:
! 683: H2BUGF(infof(data_s, "Store %zu bytes headers from stream %u at %p\n",
! 684: ncopy, stream_id, stream->mem));
! 685:
! 686: stream->len -= ncopy;
! 687: stream->memlen += ncopy;
! 688:
! 689: drain_this(data_s, httpc);
! 690: {
! 691: /* get the pointer from userp again since it was re-assigned above */
! 692: struct connectdata *conn_s = (struct connectdata *)userp;
! 693:
! 694: /* if we receive data for another handle, wake that up */
! 695: if(conn_s->data != data_s)
! 696: Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
! 697: }
! 698: break;
! 699: case NGHTTP2_PUSH_PROMISE:
! 700: rv = push_promise(data_s, conn, &frame->push_promise);
! 701: if(rv) { /* deny! */
! 702: rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
! 703: frame->push_promise.promised_stream_id,
! 704: NGHTTP2_CANCEL);
! 705: if(nghttp2_is_fatal(rv)) {
! 706: return rv;
! 707: }
! 708: }
! 709: break;
! 710: default:
! 711: H2BUGF(infof(data_s, "Got frame type %x for stream %u!\n",
! 712: frame->hd.type, stream_id));
! 713: break;
! 714: }
! 715: return 0;
! 716: }
! 717:
! 718: static int on_data_chunk_recv(nghttp2_session *session, uint8_t flags,
! 719: int32_t stream_id,
! 720: const uint8_t *data, size_t len, void *userp)
! 721: {
! 722: struct HTTP *stream;
! 723: struct Curl_easy *data_s;
! 724: size_t nread;
! 725: struct connectdata *conn = (struct connectdata *)userp;
! 726: (void)session;
! 727: (void)flags;
! 728: (void)data;
! 729:
! 730: DEBUGASSERT(stream_id); /* should never be a zero stream ID here */
! 731:
! 732: /* get the stream from the hash based on Stream ID */
! 733: data_s = nghttp2_session_get_stream_user_data(session, stream_id);
! 734: if(!data_s)
! 735: /* Receiving a Stream ID not in the hash should not happen, this is an
! 736: internal error more than anything else! */
! 737: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 738:
! 739: stream = data_s->req.protop;
! 740: if(!stream)
! 741: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 742:
! 743: nread = CURLMIN(stream->len, len);
! 744: memcpy(&stream->mem[stream->memlen], data, nread);
! 745:
! 746: stream->len -= nread;
! 747: stream->memlen += nread;
! 748:
! 749: drain_this(data_s, &conn->proto.httpc);
! 750:
! 751: /* if we receive data for another handle, wake that up */
! 752: if(conn->data != data_s)
! 753: Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
! 754:
! 755: H2BUGF(infof(data_s, "%zu data received for stream %u "
! 756: "(%zu left in buffer %p, total %zu)\n",
! 757: nread, stream_id,
! 758: stream->len, stream->mem,
! 759: stream->memlen));
! 760:
! 761: if(nread < len) {
! 762: stream->pausedata = data + nread;
! 763: stream->pauselen = len - nread;
! 764: H2BUGF(infof(data_s, "NGHTTP2_ERR_PAUSE - %zu bytes out of buffer"
! 765: ", stream %u\n",
! 766: len - nread, stream_id));
! 767: data_s->conn->proto.httpc.pause_stream_id = stream_id;
! 768:
! 769: return NGHTTP2_ERR_PAUSE;
! 770: }
! 771:
! 772: /* pause execution of nghttp2 if we received data for another handle
! 773: in order to process them first. */
! 774: if(conn->data != data_s) {
! 775: data_s->conn->proto.httpc.pause_stream_id = stream_id;
! 776:
! 777: return NGHTTP2_ERR_PAUSE;
! 778: }
! 779:
! 780: return 0;
! 781: }
! 782:
! 783: static int on_stream_close(nghttp2_session *session, int32_t stream_id,
! 784: uint32_t error_code, void *userp)
! 785: {
! 786: struct Curl_easy *data_s;
! 787: struct HTTP *stream;
! 788: struct connectdata *conn = (struct connectdata *)userp;
! 789: int rv;
! 790: (void)session;
! 791: (void)stream_id;
! 792:
! 793: if(stream_id) {
! 794: struct http_conn *httpc;
! 795: /* get the stream from the hash based on Stream ID, stream ID zero is for
! 796: connection-oriented stuff */
! 797: data_s = nghttp2_session_get_stream_user_data(session, stream_id);
! 798: if(!data_s) {
! 799: /* We could get stream ID not in the hash. For example, if we
! 800: decided to reject stream (e.g., PUSH_PROMISE). */
! 801: return 0;
! 802: }
! 803: H2BUGF(infof(data_s, "on_stream_close(), %s (err %d), stream %u\n",
! 804: nghttp2_strerror(error_code), error_code, stream_id));
! 805: stream = data_s->req.protop;
! 806: if(!stream)
! 807: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 808:
! 809: stream->closed = TRUE;
! 810: httpc = &conn->proto.httpc;
! 811: drain_this(data_s, httpc);
! 812: Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
! 813: httpc->error_code = error_code;
! 814:
! 815: /* remove the entry from the hash as the stream is now gone */
! 816: rv = nghttp2_session_set_stream_user_data(session, stream_id, 0);
! 817: if(rv) {
! 818: infof(data_s, "http/2: failed to clear user_data for stream %d!\n",
! 819: stream_id);
! 820: DEBUGASSERT(0);
! 821: }
! 822: if(stream_id == httpc->pause_stream_id) {
! 823: H2BUGF(infof(data_s, "Stopped the pause stream!\n"));
! 824: httpc->pause_stream_id = 0;
! 825: }
! 826: H2BUGF(infof(data_s, "Removed stream %u hash!\n", stream_id));
! 827: stream->stream_id = 0; /* cleared */
! 828: }
! 829: return 0;
! 830: }
! 831:
! 832: static int on_begin_headers(nghttp2_session *session,
! 833: const nghttp2_frame *frame, void *userp)
! 834: {
! 835: struct HTTP *stream;
! 836: struct Curl_easy *data_s = NULL;
! 837: (void)userp;
! 838:
! 839: data_s = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
! 840: if(!data_s) {
! 841: return 0;
! 842: }
! 843:
! 844: H2BUGF(infof(data_s, "on_begin_headers() was called\n"));
! 845:
! 846: if(frame->hd.type != NGHTTP2_HEADERS) {
! 847: return 0;
! 848: }
! 849:
! 850: stream = data_s->req.protop;
! 851: if(!stream || !stream->bodystarted) {
! 852: return 0;
! 853: }
! 854:
! 855: if(!stream->trailer_recvbuf) {
! 856: stream->trailer_recvbuf = Curl_add_buffer_init();
! 857: if(!stream->trailer_recvbuf) {
! 858: return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
! 859: }
! 860: }
! 861: return 0;
! 862: }
! 863:
! 864: /* Decode HTTP status code. Returns -1 if no valid status code was
! 865: decoded. */
! 866: static int decode_status_code(const uint8_t *value, size_t len)
! 867: {
! 868: int i;
! 869: int res;
! 870:
! 871: if(len != 3) {
! 872: return -1;
! 873: }
! 874:
! 875: res = 0;
! 876:
! 877: for(i = 0; i < 3; ++i) {
! 878: char c = value[i];
! 879:
! 880: if(c < '0' || c > '9') {
! 881: return -1;
! 882: }
! 883:
! 884: res *= 10;
! 885: res += c - '0';
! 886: }
! 887:
! 888: return res;
! 889: }
! 890:
! 891: /* frame->hd.type is either NGHTTP2_HEADERS or NGHTTP2_PUSH_PROMISE */
! 892: static int on_header(nghttp2_session *session, const nghttp2_frame *frame,
! 893: const uint8_t *name, size_t namelen,
! 894: const uint8_t *value, size_t valuelen,
! 895: uint8_t flags,
! 896: void *userp)
! 897: {
! 898: struct HTTP *stream;
! 899: struct Curl_easy *data_s;
! 900: int32_t stream_id = frame->hd.stream_id;
! 901: struct connectdata *conn = (struct connectdata *)userp;
! 902: CURLcode result;
! 903: (void)flags;
! 904:
! 905: DEBUGASSERT(stream_id); /* should never be a zero stream ID here */
! 906:
! 907: /* get the stream from the hash based on Stream ID */
! 908: data_s = nghttp2_session_get_stream_user_data(session, stream_id);
! 909: if(!data_s)
! 910: /* Receiving a Stream ID not in the hash should not happen, this is an
! 911: internal error more than anything else! */
! 912: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 913:
! 914: stream = data_s->req.protop;
! 915: if(!stream) {
! 916: failf(data_s, "Internal NULL stream! 5\n");
! 917: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 918: }
! 919:
! 920: /* Store received PUSH_PROMISE headers to be used when the subsequent
! 921: PUSH_PROMISE callback comes */
! 922: if(frame->hd.type == NGHTTP2_PUSH_PROMISE) {
! 923: char *h;
! 924:
! 925: if(!strcmp(":authority", (const char *)name)) {
! 926: /* pseudo headers are lower case */
! 927: int rc = 0;
! 928: char *check = aprintf("%s:%d", conn->host.name, conn->remote_port);
! 929: if(!check)
! 930: /* no memory */
! 931: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 932: if(!Curl_strcasecompare(check, (const char *)value) &&
! 933: ((conn->remote_port != conn->given->defport) ||
! 934: !Curl_strcasecompare(conn->host.name, (const char *)value))) {
! 935: /* This is push is not for the same authority that was asked for in
! 936: * the URL. RFC 7540 section 8.2 says: "A client MUST treat a
! 937: * PUSH_PROMISE for which the server is not authoritative as a stream
! 938: * error of type PROTOCOL_ERROR."
! 939: */
! 940: (void)nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
! 941: stream_id, NGHTTP2_PROTOCOL_ERROR);
! 942: rc = NGHTTP2_ERR_CALLBACK_FAILURE;
! 943: }
! 944: free(check);
! 945: if(rc)
! 946: return rc;
! 947: }
! 948:
! 949: if(!stream->push_headers) {
! 950: stream->push_headers_alloc = 10;
! 951: stream->push_headers = malloc(stream->push_headers_alloc *
! 952: sizeof(char *));
! 953: if(!stream->push_headers)
! 954: return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
! 955: stream->push_headers_used = 0;
! 956: }
! 957: else if(stream->push_headers_used ==
! 958: stream->push_headers_alloc) {
! 959: char **headp;
! 960: stream->push_headers_alloc *= 2;
! 961: headp = Curl_saferealloc(stream->push_headers,
! 962: stream->push_headers_alloc * sizeof(char *));
! 963: if(!headp) {
! 964: stream->push_headers = NULL;
! 965: return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
! 966: }
! 967: stream->push_headers = headp;
! 968: }
! 969: h = aprintf("%s:%s", name, value);
! 970: if(h)
! 971: stream->push_headers[stream->push_headers_used++] = h;
! 972: return 0;
! 973: }
! 974:
! 975: if(stream->bodystarted) {
! 976: /* This is trailer fields. */
! 977: /* 4 is for ": " and "\r\n". */
! 978: uint32_t n = (uint32_t)(namelen + valuelen + 4);
! 979:
! 980: H2BUGF(infof(data_s, "h2 trailer: %.*s: %.*s\n", namelen, name, valuelen,
! 981: value));
! 982:
! 983: result = Curl_add_buffer(&stream->trailer_recvbuf, &n, sizeof(n));
! 984: if(result)
! 985: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 986: result = Curl_add_buffer(&stream->trailer_recvbuf, name, namelen);
! 987: if(result)
! 988: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 989: result = Curl_add_buffer(&stream->trailer_recvbuf, ": ", 2);
! 990: if(result)
! 991: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 992: result = Curl_add_buffer(&stream->trailer_recvbuf, value, valuelen);
! 993: if(result)
! 994: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 995: result = Curl_add_buffer(&stream->trailer_recvbuf, "\r\n\0", 3);
! 996: if(result)
! 997: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 998:
! 999: return 0;
! 1000: }
! 1001:
! 1002: if(namelen == sizeof(":status") - 1 &&
! 1003: memcmp(":status", name, namelen) == 0) {
! 1004: /* nghttp2 guarantees :status is received first and only once, and
! 1005: value is 3 digits status code, and decode_status_code always
! 1006: succeeds. */
! 1007: stream->status_code = decode_status_code(value, valuelen);
! 1008: DEBUGASSERT(stream->status_code != -1);
! 1009:
! 1010: result = Curl_add_buffer(&stream->header_recvbuf, "HTTP/2 ", 7);
! 1011: if(result)
! 1012: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1013: result = Curl_add_buffer(&stream->header_recvbuf, value, valuelen);
! 1014: if(result)
! 1015: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1016: /* the space character after the status code is mandatory */
! 1017: result = Curl_add_buffer(&stream->header_recvbuf, " \r\n", 3);
! 1018: if(result)
! 1019: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1020: /* if we receive data for another handle, wake that up */
! 1021: if(conn->data != data_s)
! 1022: Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
! 1023:
! 1024: H2BUGF(infof(data_s, "h2 status: HTTP/2 %03d (easy %p)\n",
! 1025: stream->status_code, data_s));
! 1026: return 0;
! 1027: }
! 1028:
! 1029: /* nghttp2 guarantees that namelen > 0, and :status was already
! 1030: received, and this is not pseudo-header field . */
! 1031: /* convert to a HTTP1-style header */
! 1032: result = Curl_add_buffer(&stream->header_recvbuf, name, namelen);
! 1033: if(result)
! 1034: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1035: result = Curl_add_buffer(&stream->header_recvbuf, ": ", 2);
! 1036: if(result)
! 1037: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1038: result = Curl_add_buffer(&stream->header_recvbuf, value, valuelen);
! 1039: if(result)
! 1040: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1041: result = Curl_add_buffer(&stream->header_recvbuf, "\r\n", 2);
! 1042: if(result)
! 1043: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1044: /* if we receive data for another handle, wake that up */
! 1045: if(conn->data != data_s)
! 1046: Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
! 1047:
! 1048: H2BUGF(infof(data_s, "h2 header: %.*s: %.*s\n", namelen, name, valuelen,
! 1049: value));
! 1050:
! 1051: return 0; /* 0 is successful */
! 1052: }
! 1053:
! 1054: static ssize_t data_source_read_callback(nghttp2_session *session,
! 1055: int32_t stream_id,
! 1056: uint8_t *buf, size_t length,
! 1057: uint32_t *data_flags,
! 1058: nghttp2_data_source *source,
! 1059: void *userp)
! 1060: {
! 1061: struct Curl_easy *data_s;
! 1062: struct HTTP *stream = NULL;
! 1063: size_t nread;
! 1064: (void)source;
! 1065: (void)userp;
! 1066:
! 1067: if(stream_id) {
! 1068: /* get the stream from the hash based on Stream ID, stream ID zero is for
! 1069: connection-oriented stuff */
! 1070: data_s = nghttp2_session_get_stream_user_data(session, stream_id);
! 1071: if(!data_s)
! 1072: /* Receiving a Stream ID not in the hash should not happen, this is an
! 1073: internal error more than anything else! */
! 1074: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1075:
! 1076: stream = data_s->req.protop;
! 1077: if(!stream)
! 1078: return NGHTTP2_ERR_CALLBACK_FAILURE;
! 1079: }
! 1080: else
! 1081: return NGHTTP2_ERR_INVALID_ARGUMENT;
! 1082:
! 1083: nread = CURLMIN(stream->upload_len, length);
! 1084: if(nread > 0) {
! 1085: memcpy(buf, stream->upload_mem, nread);
! 1086: stream->upload_mem += nread;
! 1087: stream->upload_len -= nread;
! 1088: if(data_s->state.infilesize != -1)
! 1089: stream->upload_left -= nread;
! 1090: }
! 1091:
! 1092: if(stream->upload_left == 0)
! 1093: *data_flags = NGHTTP2_DATA_FLAG_EOF;
! 1094: else if(nread == 0)
! 1095: return NGHTTP2_ERR_DEFERRED;
! 1096:
! 1097: H2BUGF(infof(data_s, "data_source_read_callback: "
! 1098: "returns %zu bytes stream %u\n",
! 1099: nread, stream_id));
! 1100:
! 1101: return nread;
! 1102: }
! 1103:
! 1104: #if !defined(CURL_DISABLE_VERBOSE_STRINGS)
! 1105: static int error_callback(nghttp2_session *session,
! 1106: const char *msg,
! 1107: size_t len,
! 1108: void *userp)
! 1109: {
! 1110: struct connectdata *conn = (struct connectdata *)userp;
! 1111: (void)session;
! 1112: infof(conn->data, "http2 error: %.*s\n", len, msg);
! 1113: return 0;
! 1114: }
! 1115: #endif
! 1116:
! 1117: static void populate_settings(struct connectdata *conn,
! 1118: struct http_conn *httpc)
! 1119: {
! 1120: nghttp2_settings_entry *iv = httpc->local_settings;
! 1121: DEBUGASSERT(conn->data);
! 1122:
! 1123: iv[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
! 1124: iv[0].value = Curl_multi_max_concurrent_streams(conn->data->multi);
! 1125:
! 1126: iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
! 1127: iv[1].value = HTTP2_HUGE_WINDOW_SIZE;
! 1128:
! 1129: iv[2].settings_id = NGHTTP2_SETTINGS_ENABLE_PUSH;
! 1130: iv[2].value = conn->data->multi->push_cb != NULL;
! 1131:
! 1132: httpc->local_settings_num = 3;
! 1133: }
! 1134:
! 1135: void Curl_http2_done(struct Curl_easy *data, bool premature)
! 1136: {
! 1137: struct HTTP *http = data->req.protop;
! 1138: struct http_conn *httpc = &data->conn->proto.httpc;
! 1139:
! 1140: /* there might be allocated resources done before this got the 'h2' pointer
! 1141: setup */
! 1142: if(http->header_recvbuf) {
! 1143: Curl_add_buffer_free(&http->header_recvbuf);
! 1144: Curl_add_buffer_free(&http->trailer_recvbuf);
! 1145: if(http->push_headers) {
! 1146: /* if they weren't used and then freed before */
! 1147: for(; http->push_headers_used > 0; --http->push_headers_used) {
! 1148: free(http->push_headers[http->push_headers_used - 1]);
! 1149: }
! 1150: free(http->push_headers);
! 1151: http->push_headers = NULL;
! 1152: }
! 1153: }
! 1154:
! 1155: if(!httpc->h2) /* not HTTP/2 ? */
! 1156: return;
! 1157:
! 1158: if(premature) {
! 1159: /* RST_STREAM */
! 1160: if(!nghttp2_submit_rst_stream(httpc->h2, NGHTTP2_FLAG_NONE,
! 1161: http->stream_id, NGHTTP2_STREAM_CLOSED))
! 1162: (void)nghttp2_session_send(httpc->h2);
! 1163:
! 1164: if(http->stream_id == httpc->pause_stream_id) {
! 1165: infof(data, "stopped the pause stream!\n");
! 1166: httpc->pause_stream_id = 0;
! 1167: }
! 1168: }
! 1169:
! 1170: if(data->state.drain)
! 1171: drained_transfer(data, httpc);
! 1172:
! 1173: /* -1 means unassigned and 0 means cleared */
! 1174: if(http->stream_id > 0) {
! 1175: int rv = nghttp2_session_set_stream_user_data(httpc->h2,
! 1176: http->stream_id, 0);
! 1177: if(rv) {
! 1178: infof(data, "http/2: failed to clear user_data for stream %d!\n",
! 1179: http->stream_id);
! 1180: DEBUGASSERT(0);
! 1181: }
! 1182: http->stream_id = 0;
! 1183: }
! 1184: }
! 1185:
! 1186: /*
! 1187: * Initialize nghttp2 for a Curl connection
! 1188: */
! 1189: static CURLcode http2_init(struct connectdata *conn)
! 1190: {
! 1191: if(!conn->proto.httpc.h2) {
! 1192: int rc;
! 1193: nghttp2_session_callbacks *callbacks;
! 1194:
! 1195: conn->proto.httpc.inbuf = malloc(H2_BUFSIZE);
! 1196: if(conn->proto.httpc.inbuf == NULL)
! 1197: return CURLE_OUT_OF_MEMORY;
! 1198:
! 1199: rc = nghttp2_session_callbacks_new(&callbacks);
! 1200:
! 1201: if(rc) {
! 1202: failf(conn->data, "Couldn't initialize nghttp2 callbacks!");
! 1203: return CURLE_OUT_OF_MEMORY; /* most likely at least */
! 1204: }
! 1205:
! 1206: /* nghttp2_send_callback */
! 1207: nghttp2_session_callbacks_set_send_callback(callbacks, send_callback);
! 1208: /* nghttp2_on_frame_recv_callback */
! 1209: nghttp2_session_callbacks_set_on_frame_recv_callback
! 1210: (callbacks, on_frame_recv);
! 1211: /* nghttp2_on_data_chunk_recv_callback */
! 1212: nghttp2_session_callbacks_set_on_data_chunk_recv_callback
! 1213: (callbacks, on_data_chunk_recv);
! 1214: /* nghttp2_on_stream_close_callback */
! 1215: nghttp2_session_callbacks_set_on_stream_close_callback
! 1216: (callbacks, on_stream_close);
! 1217: /* nghttp2_on_begin_headers_callback */
! 1218: nghttp2_session_callbacks_set_on_begin_headers_callback
! 1219: (callbacks, on_begin_headers);
! 1220: /* nghttp2_on_header_callback */
! 1221: nghttp2_session_callbacks_set_on_header_callback(callbacks, on_header);
! 1222:
! 1223: nghttp2_session_callbacks_set_error_callback(callbacks, error_callback);
! 1224:
! 1225: /* The nghttp2 session is not yet setup, do it */
! 1226: rc = nghttp2_session_client_new(&conn->proto.httpc.h2, callbacks, conn);
! 1227:
! 1228: nghttp2_session_callbacks_del(callbacks);
! 1229:
! 1230: if(rc) {
! 1231: failf(conn->data, "Couldn't initialize nghttp2!");
! 1232: return CURLE_OUT_OF_MEMORY; /* most likely at least */
! 1233: }
! 1234: }
! 1235: return CURLE_OK;
! 1236: }
! 1237:
! 1238: /*
! 1239: * Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
! 1240: */
! 1241: CURLcode Curl_http2_request_upgrade(Curl_send_buffer *req,
! 1242: struct connectdata *conn)
! 1243: {
! 1244: CURLcode result;
! 1245: ssize_t binlen;
! 1246: char *base64;
! 1247: size_t blen;
! 1248: struct SingleRequest *k = &conn->data->req;
! 1249: uint8_t *binsettings = conn->proto.httpc.binsettings;
! 1250: struct http_conn *httpc = &conn->proto.httpc;
! 1251:
! 1252: populate_settings(conn, httpc);
! 1253:
! 1254: /* this returns number of bytes it wrote */
! 1255: binlen = nghttp2_pack_settings_payload(binsettings, H2_BINSETTINGS_LEN,
! 1256: httpc->local_settings,
! 1257: httpc->local_settings_num);
! 1258: if(!binlen) {
! 1259: failf(conn->data, "nghttp2 unexpectedly failed on pack_settings_payload");
! 1260: Curl_add_buffer_free(&req);
! 1261: return CURLE_FAILED_INIT;
! 1262: }
! 1263: conn->proto.httpc.binlen = binlen;
! 1264:
! 1265: result = Curl_base64url_encode(conn->data, (const char *)binsettings, binlen,
! 1266: &base64, &blen);
! 1267: if(result) {
! 1268: Curl_add_buffer_free(&req);
! 1269: return result;
! 1270: }
! 1271:
! 1272: result = Curl_add_bufferf(&req,
! 1273: "Connection: Upgrade, HTTP2-Settings\r\n"
! 1274: "Upgrade: %s\r\n"
! 1275: "HTTP2-Settings: %s\r\n",
! 1276: NGHTTP2_CLEARTEXT_PROTO_VERSION_ID, base64);
! 1277: free(base64);
! 1278:
! 1279: k->upgr101 = UPGR101_REQUESTED;
! 1280:
! 1281: return result;
! 1282: }
! 1283:
! 1284: /*
! 1285: * Returns nonzero if current HTTP/2 session should be closed.
! 1286: */
! 1287: static int should_close_session(struct http_conn *httpc)
! 1288: {
! 1289: return httpc->drain_total == 0 && !nghttp2_session_want_read(httpc->h2) &&
! 1290: !nghttp2_session_want_write(httpc->h2);
! 1291: }
! 1292:
! 1293: /*
! 1294: * h2_process_pending_input() processes pending input left in
! 1295: * httpc->inbuf. Then, call h2_session_send() to send pending data.
! 1296: * This function returns 0 if it succeeds, or -1 and error code will
! 1297: * be assigned to *err.
! 1298: */
! 1299: static int h2_process_pending_input(struct connectdata *conn,
! 1300: struct http_conn *httpc,
! 1301: CURLcode *err)
! 1302: {
! 1303: ssize_t nread;
! 1304: char *inbuf;
! 1305: ssize_t rv;
! 1306: struct Curl_easy *data = conn->data;
! 1307:
! 1308: nread = httpc->inbuflen - httpc->nread_inbuf;
! 1309: inbuf = httpc->inbuf + httpc->nread_inbuf;
! 1310:
! 1311: rv = nghttp2_session_mem_recv(httpc->h2, (const uint8_t *)inbuf, nread);
! 1312: if(rv < 0) {
! 1313: failf(data,
! 1314: "h2_process_pending_input: nghttp2_session_mem_recv() returned "
! 1315: "%zd:%s\n", rv, nghttp2_strerror((int)rv));
! 1316: *err = CURLE_RECV_ERROR;
! 1317: return -1;
! 1318: }
! 1319:
! 1320: if(nread == rv) {
! 1321: H2BUGF(infof(data,
! 1322: "h2_process_pending_input: All data in connection buffer "
! 1323: "processed\n"));
! 1324: httpc->inbuflen = 0;
! 1325: httpc->nread_inbuf = 0;
! 1326: }
! 1327: else {
! 1328: httpc->nread_inbuf += rv;
! 1329: H2BUGF(infof(data,
! 1330: "h2_process_pending_input: %zu bytes left in connection "
! 1331: "buffer\n",
! 1332: httpc->inbuflen - httpc->nread_inbuf));
! 1333: }
! 1334:
! 1335: rv = h2_session_send(data, httpc->h2);
! 1336: if(rv != 0) {
! 1337: *err = CURLE_SEND_ERROR;
! 1338: return -1;
! 1339: }
! 1340:
! 1341: if(should_close_session(httpc)) {
! 1342: H2BUGF(infof(data,
! 1343: "h2_process_pending_input: nothing to do in this session\n"));
! 1344: if(httpc->error_code)
! 1345: *err = CURLE_HTTP2;
! 1346: else {
! 1347: /* not an error per se, but should still close the connection */
! 1348: connclose(conn, "GOAWAY received");
! 1349: *err = CURLE_OK;
! 1350: }
! 1351: return -1;
! 1352: }
! 1353:
! 1354: return 0;
! 1355: }
! 1356:
! 1357: /*
! 1358: * Called from transfer.c:done_sending when we stop uploading.
! 1359: */
! 1360: CURLcode Curl_http2_done_sending(struct connectdata *conn)
! 1361: {
! 1362: CURLcode result = CURLE_OK;
! 1363:
! 1364: if((conn->handler == &Curl_handler_http2_ssl) ||
! 1365: (conn->handler == &Curl_handler_http2)) {
! 1366: /* make sure this is only attempted for HTTP/2 transfers */
! 1367:
! 1368: struct HTTP *stream = conn->data->req.protop;
! 1369:
! 1370: if(stream->upload_left) {
! 1371: /* If the stream still thinks there's data left to upload. */
! 1372: struct http_conn *httpc = &conn->proto.httpc;
! 1373: nghttp2_session *h2 = httpc->h2;
! 1374:
! 1375: stream->upload_left = 0; /* DONE! */
! 1376:
! 1377: /* resume sending here to trigger the callback to get called again so
! 1378: that it can signal EOF to nghttp2 */
! 1379: (void)nghttp2_session_resume_data(h2, stream->stream_id);
! 1380:
! 1381: (void)h2_process_pending_input(conn, httpc, &result);
! 1382: }
! 1383: }
! 1384: return result;
! 1385: }
! 1386:
! 1387: static ssize_t http2_handle_stream_close(struct connectdata *conn,
! 1388: struct Curl_easy *data,
! 1389: struct HTTP *stream, CURLcode *err)
! 1390: {
! 1391: char *trailer_pos, *trailer_end;
! 1392: CURLcode result;
! 1393: struct http_conn *httpc = &conn->proto.httpc;
! 1394:
! 1395: if(httpc->pause_stream_id == stream->stream_id) {
! 1396: httpc->pause_stream_id = 0;
! 1397: }
! 1398:
! 1399: drained_transfer(data, httpc);
! 1400:
! 1401: if(httpc->pause_stream_id == 0) {
! 1402: if(h2_process_pending_input(conn, httpc, err) != 0) {
! 1403: return -1;
! 1404: }
! 1405: }
! 1406:
! 1407: DEBUGASSERT(data->state.drain == 0);
! 1408:
! 1409: /* Reset to FALSE to prevent infinite loop in readwrite_data function. */
! 1410: stream->closed = FALSE;
! 1411: if(httpc->error_code == NGHTTP2_REFUSED_STREAM) {
! 1412: H2BUGF(infof(data, "REFUSED_STREAM (%d), try again on a new connection!\n",
! 1413: stream->stream_id));
! 1414: connclose(conn, "REFUSED_STREAM"); /* don't use this anymore */
! 1415: data->state.refused_stream = TRUE;
! 1416: *err = CURLE_RECV_ERROR; /* trigger Curl_retry_request() later */
! 1417: return -1;
! 1418: }
! 1419: else if(httpc->error_code != NGHTTP2_NO_ERROR) {
! 1420: failf(data, "HTTP/2 stream %d was not closed cleanly: %s (err %u)",
! 1421: stream->stream_id, nghttp2_strerror(httpc->error_code),
! 1422: httpc->error_code);
! 1423: *err = CURLE_HTTP2_STREAM;
! 1424: return -1;
! 1425: }
! 1426:
! 1427: if(!stream->bodystarted) {
! 1428: failf(data, "HTTP/2 stream %d was closed cleanly, but before getting "
! 1429: " all response header fields, treated as error",
! 1430: stream->stream_id);
! 1431: *err = CURLE_HTTP2_STREAM;
! 1432: return -1;
! 1433: }
! 1434:
! 1435: if(stream->trailer_recvbuf && stream->trailer_recvbuf->buffer) {
! 1436: trailer_pos = stream->trailer_recvbuf->buffer;
! 1437: trailer_end = trailer_pos + stream->trailer_recvbuf->size_used;
! 1438:
! 1439: for(; trailer_pos < trailer_end;) {
! 1440: uint32_t n;
! 1441: memcpy(&n, trailer_pos, sizeof(n));
! 1442: trailer_pos += sizeof(n);
! 1443:
! 1444: result = Curl_client_write(conn, CLIENTWRITE_HEADER, trailer_pos, n);
! 1445: if(result) {
! 1446: *err = result;
! 1447: return -1;
! 1448: }
! 1449:
! 1450: trailer_pos += n + 1;
! 1451: }
! 1452: }
! 1453:
! 1454: stream->close_handled = TRUE;
! 1455:
! 1456: H2BUGF(infof(data, "http2_recv returns 0, http2_handle_stream_close\n"));
! 1457: return 0;
! 1458: }
! 1459:
! 1460: /*
! 1461: * h2_pri_spec() fills in the pri_spec struct, used by nghttp2 to send weight
! 1462: * and dependency to the peer. It also stores the updated values in the state
! 1463: * struct.
! 1464: */
! 1465:
! 1466: static void h2_pri_spec(struct Curl_easy *data,
! 1467: nghttp2_priority_spec *pri_spec)
! 1468: {
! 1469: struct HTTP *depstream = (data->set.stream_depends_on?
! 1470: data->set.stream_depends_on->req.protop:NULL);
! 1471: int32_t depstream_id = depstream? depstream->stream_id:0;
! 1472: nghttp2_priority_spec_init(pri_spec, depstream_id, data->set.stream_weight,
! 1473: data->set.stream_depends_e);
! 1474: data->state.stream_weight = data->set.stream_weight;
! 1475: data->state.stream_depends_e = data->set.stream_depends_e;
! 1476: data->state.stream_depends_on = data->set.stream_depends_on;
! 1477: }
! 1478:
! 1479: /*
! 1480: * h2_session_send() checks if there's been an update in the priority /
! 1481: * dependency settings and if so it submits a PRIORITY frame with the updated
! 1482: * info.
! 1483: */
! 1484: static int h2_session_send(struct Curl_easy *data,
! 1485: nghttp2_session *h2)
! 1486: {
! 1487: struct HTTP *stream = data->req.protop;
! 1488: if((data->set.stream_weight != data->state.stream_weight) ||
! 1489: (data->set.stream_depends_e != data->state.stream_depends_e) ||
! 1490: (data->set.stream_depends_on != data->state.stream_depends_on) ) {
! 1491: /* send new weight and/or dependency */
! 1492: nghttp2_priority_spec pri_spec;
! 1493: int rv;
! 1494:
! 1495: h2_pri_spec(data, &pri_spec);
! 1496:
! 1497: H2BUGF(infof(data, "Queuing PRIORITY on stream %u (easy %p)\n",
! 1498: stream->stream_id, data));
! 1499: DEBUGASSERT(stream->stream_id != -1);
! 1500: rv = nghttp2_submit_priority(h2, NGHTTP2_FLAG_NONE, stream->stream_id,
! 1501: &pri_spec);
! 1502: if(rv)
! 1503: return rv;
! 1504: }
! 1505:
! 1506: return nghttp2_session_send(h2);
! 1507: }
! 1508:
! 1509: static ssize_t http2_recv(struct connectdata *conn, int sockindex,
! 1510: char *mem, size_t len, CURLcode *err)
! 1511: {
! 1512: CURLcode result = CURLE_OK;
! 1513: ssize_t rv;
! 1514: ssize_t nread;
! 1515: struct http_conn *httpc = &conn->proto.httpc;
! 1516: struct Curl_easy *data = conn->data;
! 1517: struct HTTP *stream = data->req.protop;
! 1518:
! 1519: (void)sockindex; /* we always do HTTP2 on sockindex 0 */
! 1520:
! 1521: if(should_close_session(httpc)) {
! 1522: H2BUGF(infof(data,
! 1523: "http2_recv: nothing to do in this session\n"));
! 1524: if(conn->bits.close) {
! 1525: /* already marked for closure, return OK and we're done */
! 1526: *err = CURLE_OK;
! 1527: return 0;
! 1528: }
! 1529: *err = CURLE_HTTP2;
! 1530: return -1;
! 1531: }
! 1532:
! 1533: /* Nullify here because we call nghttp2_session_send() and they
! 1534: might refer to the old buffer. */
! 1535: stream->upload_mem = NULL;
! 1536: stream->upload_len = 0;
! 1537:
! 1538: /*
! 1539: * At this point 'stream' is just in the Curl_easy the connection
! 1540: * identifies as its owner at this time.
! 1541: */
! 1542:
! 1543: if(stream->bodystarted &&
! 1544: stream->nread_header_recvbuf < stream->header_recvbuf->size_used) {
! 1545: /* If there is body data pending for this stream to return, do that */
! 1546: size_t left =
! 1547: stream->header_recvbuf->size_used - stream->nread_header_recvbuf;
! 1548: size_t ncopy = CURLMIN(len, left);
! 1549: memcpy(mem, stream->header_recvbuf->buffer + stream->nread_header_recvbuf,
! 1550: ncopy);
! 1551: stream->nread_header_recvbuf += ncopy;
! 1552:
! 1553: H2BUGF(infof(data, "http2_recv: Got %d bytes from header_recvbuf\n",
! 1554: (int)ncopy));
! 1555: return ncopy;
! 1556: }
! 1557:
! 1558: H2BUGF(infof(data, "http2_recv: easy %p (stream %u) win %u/%u\n",
! 1559: data, stream->stream_id,
! 1560: nghttp2_session_get_local_window_size(httpc->h2),
! 1561: nghttp2_session_get_stream_local_window_size(httpc->h2,
! 1562: stream->stream_id)
! 1563: ));
! 1564:
! 1565: if((data->state.drain) && stream->memlen) {
! 1566: H2BUGF(infof(data, "http2_recv: DRAIN %zu bytes stream %u!! (%p => %p)\n",
! 1567: stream->memlen, stream->stream_id,
! 1568: stream->mem, mem));
! 1569: if(mem != stream->mem) {
! 1570: /* if we didn't get the same buffer this time, we must move the data to
! 1571: the beginning */
! 1572: memmove(mem, stream->mem, stream->memlen);
! 1573: stream->len = len - stream->memlen;
! 1574: stream->mem = mem;
! 1575: }
! 1576: if(httpc->pause_stream_id == stream->stream_id && !stream->pausedata) {
! 1577: /* We have paused nghttp2, but we have no pause data (see
! 1578: on_data_chunk_recv). */
! 1579: httpc->pause_stream_id = 0;
! 1580: if(h2_process_pending_input(conn, httpc, &result) != 0) {
! 1581: *err = result;
! 1582: return -1;
! 1583: }
! 1584: }
! 1585: }
! 1586: else if(stream->pausedata) {
! 1587: DEBUGASSERT(httpc->pause_stream_id == stream->stream_id);
! 1588: nread = CURLMIN(len, stream->pauselen);
! 1589: memcpy(mem, stream->pausedata, nread);
! 1590:
! 1591: stream->pausedata += nread;
! 1592: stream->pauselen -= nread;
! 1593:
! 1594: if(stream->pauselen == 0) {
! 1595: H2BUGF(infof(data, "Unpaused by stream %u\n", stream->stream_id));
! 1596: DEBUGASSERT(httpc->pause_stream_id == stream->stream_id);
! 1597: httpc->pause_stream_id = 0;
! 1598:
! 1599: stream->pausedata = NULL;
! 1600: stream->pauselen = 0;
! 1601:
! 1602: /* When NGHTTP2_ERR_PAUSE is returned from
! 1603: data_source_read_callback, we might not process DATA frame
! 1604: fully. Calling nghttp2_session_mem_recv() again will
! 1605: continue to process DATA frame, but if there is no incoming
! 1606: frames, then we have to call it again with 0-length data.
! 1607: Without this, on_stream_close callback will not be called,
! 1608: and stream could be hanged. */
! 1609: if(h2_process_pending_input(conn, httpc, &result) != 0) {
! 1610: *err = result;
! 1611: return -1;
! 1612: }
! 1613: }
! 1614: H2BUGF(infof(data, "http2_recv: returns unpaused %zd bytes on stream %u\n",
! 1615: nread, stream->stream_id));
! 1616: return nread;
! 1617: }
! 1618: else if(httpc->pause_stream_id) {
! 1619: /* If a stream paused nghttp2_session_mem_recv previously, and has
! 1620: not processed all data, it still refers to the buffer in
! 1621: nghttp2_session. If we call nghttp2_session_mem_recv(), we may
! 1622: overwrite that buffer. To avoid that situation, just return
! 1623: here with CURLE_AGAIN. This could be busy loop since data in
! 1624: socket is not read. But it seems that usually streams are
! 1625: notified with its drain property, and socket is read again
! 1626: quickly. */
! 1627: if(stream->closed)
! 1628: /* closed overrides paused */
! 1629: return 0;
! 1630: H2BUGF(infof(data, "stream %x is paused, pause id: %x\n",
! 1631: stream->stream_id, httpc->pause_stream_id));
! 1632: *err = CURLE_AGAIN;
! 1633: return -1;
! 1634: }
! 1635: else {
! 1636: char *inbuf;
! 1637: /* remember where to store incoming data for this stream and how big the
! 1638: buffer is */
! 1639: stream->mem = mem;
! 1640: stream->len = len;
! 1641: stream->memlen = 0;
! 1642:
! 1643: if(httpc->inbuflen == 0) {
! 1644: nread = ((Curl_recv *)httpc->recv_underlying)(
! 1645: conn, FIRSTSOCKET, httpc->inbuf, H2_BUFSIZE, &result);
! 1646:
! 1647: if(nread == -1) {
! 1648: if(result != CURLE_AGAIN)
! 1649: failf(data, "Failed receiving HTTP2 data");
! 1650: else if(stream->closed)
! 1651: /* received when the stream was already closed! */
! 1652: return http2_handle_stream_close(conn, data, stream, err);
! 1653:
! 1654: *err = result;
! 1655: return -1;
! 1656: }
! 1657:
! 1658: if(nread == 0) {
! 1659: H2BUGF(infof(data, "end of stream\n"));
! 1660: *err = CURLE_OK;
! 1661: return 0;
! 1662: }
! 1663:
! 1664: H2BUGF(infof(data, "nread=%zd\n", nread));
! 1665:
! 1666: httpc->inbuflen = nread;
! 1667: inbuf = httpc->inbuf;
! 1668: }
! 1669: else {
! 1670: nread = httpc->inbuflen - httpc->nread_inbuf;
! 1671: inbuf = httpc->inbuf + httpc->nread_inbuf;
! 1672:
! 1673: H2BUGF(infof(data, "Use data left in connection buffer, nread=%zd\n",
! 1674: nread));
! 1675: }
! 1676: rv = nghttp2_session_mem_recv(httpc->h2, (const uint8_t *)inbuf, nread);
! 1677:
! 1678: if(nghttp2_is_fatal((int)rv)) {
! 1679: failf(data, "nghttp2_session_mem_recv() returned %zd:%s\n",
! 1680: rv, nghttp2_strerror((int)rv));
! 1681: *err = CURLE_RECV_ERROR;
! 1682: return -1;
! 1683: }
! 1684: H2BUGF(infof(data, "nghttp2_session_mem_recv() returns %zd\n", rv));
! 1685: if(nread == rv) {
! 1686: H2BUGF(infof(data, "All data in connection buffer processed\n"));
! 1687: httpc->inbuflen = 0;
! 1688: httpc->nread_inbuf = 0;
! 1689: }
! 1690: else {
! 1691: httpc->nread_inbuf += rv;
! 1692: H2BUGF(infof(data, "%zu bytes left in connection buffer\n",
! 1693: httpc->inbuflen - httpc->nread_inbuf));
! 1694: }
! 1695: /* Always send pending frames in nghttp2 session, because
! 1696: nghttp2_session_mem_recv() may queue new frame */
! 1697: rv = h2_session_send(data, httpc->h2);
! 1698: if(rv != 0) {
! 1699: *err = CURLE_SEND_ERROR;
! 1700: return -1;
! 1701: }
! 1702:
! 1703: if(should_close_session(httpc)) {
! 1704: H2BUGF(infof(data, "http2_recv: nothing to do in this session\n"));
! 1705: *err = CURLE_HTTP2;
! 1706: return -1;
! 1707: }
! 1708: }
! 1709: if(stream->memlen) {
! 1710: ssize_t retlen = stream->memlen;
! 1711: H2BUGF(infof(data, "http2_recv: returns %zd for stream %u\n",
! 1712: retlen, stream->stream_id));
! 1713: stream->memlen = 0;
! 1714:
! 1715: if(httpc->pause_stream_id == stream->stream_id) {
! 1716: /* data for this stream is returned now, but this stream caused a pause
! 1717: already so we need it called again asap */
! 1718: H2BUGF(infof(data, "Data returned for PAUSED stream %u\n",
! 1719: stream->stream_id));
! 1720: }
! 1721: else if(!stream->closed) {
! 1722: drained_transfer(data, httpc);
! 1723: }
! 1724: else
! 1725: /* this stream is closed, trigger a another read ASAP to detect that */
! 1726: Curl_expire(data, 0, EXPIRE_RUN_NOW);
! 1727:
! 1728: return retlen;
! 1729: }
! 1730: if(stream->closed)
! 1731: return 0;
! 1732: *err = CURLE_AGAIN;
! 1733: H2BUGF(infof(data, "http2_recv returns AGAIN for stream %u\n",
! 1734: stream->stream_id));
! 1735: return -1;
! 1736: }
! 1737:
! 1738: /* Index where :authority header field will appear in request header
! 1739: field list. */
! 1740: #define AUTHORITY_DST_IDX 3
! 1741:
! 1742: /* USHRT_MAX is 65535 == 0xffff */
! 1743: #define HEADER_OVERFLOW(x) \
! 1744: (x.namelen > 0xffff || x.valuelen > 0xffff - x.namelen)
! 1745:
! 1746: /*
! 1747: * Check header memory for the token "trailers".
! 1748: * Parse the tokens as separated by comma and surrounded by whitespace.
! 1749: * Returns TRUE if found or FALSE if not.
! 1750: */
! 1751: static bool contains_trailers(const char *p, size_t len)
! 1752: {
! 1753: const char *end = p + len;
! 1754: for(;;) {
! 1755: for(; p != end && (*p == ' ' || *p == '\t'); ++p)
! 1756: ;
! 1757: if(p == end || (size_t)(end - p) < sizeof("trailers") - 1)
! 1758: return FALSE;
! 1759: if(strncasecompare("trailers", p, sizeof("trailers") - 1)) {
! 1760: p += sizeof("trailers") - 1;
! 1761: for(; p != end && (*p == ' ' || *p == '\t'); ++p)
! 1762: ;
! 1763: if(p == end || *p == ',')
! 1764: return TRUE;
! 1765: }
! 1766: /* skip to next token */
! 1767: for(; p != end && *p != ','; ++p)
! 1768: ;
! 1769: if(p == end)
! 1770: return FALSE;
! 1771: ++p;
! 1772: }
! 1773: }
! 1774:
! 1775: typedef enum {
! 1776: /* Send header to server */
! 1777: HEADERINST_FORWARD,
! 1778: /* Don't send header to server */
! 1779: HEADERINST_IGNORE,
! 1780: /* Discard header, and replace it with "te: trailers" */
! 1781: HEADERINST_TE_TRAILERS
! 1782: } header_instruction;
! 1783:
! 1784: /* Decides how to treat given header field. */
! 1785: static header_instruction inspect_header(const char *name, size_t namelen,
! 1786: const char *value, size_t valuelen) {
! 1787: switch(namelen) {
! 1788: case 2:
! 1789: if(!strncasecompare("te", name, namelen))
! 1790: return HEADERINST_FORWARD;
! 1791:
! 1792: return contains_trailers(value, valuelen) ?
! 1793: HEADERINST_TE_TRAILERS : HEADERINST_IGNORE;
! 1794: case 7:
! 1795: return strncasecompare("upgrade", name, namelen) ?
! 1796: HEADERINST_IGNORE : HEADERINST_FORWARD;
! 1797: case 10:
! 1798: return (strncasecompare("connection", name, namelen) ||
! 1799: strncasecompare("keep-alive", name, namelen)) ?
! 1800: HEADERINST_IGNORE : HEADERINST_FORWARD;
! 1801: case 16:
! 1802: return strncasecompare("proxy-connection", name, namelen) ?
! 1803: HEADERINST_IGNORE : HEADERINST_FORWARD;
! 1804: case 17:
! 1805: return strncasecompare("transfer-encoding", name, namelen) ?
! 1806: HEADERINST_IGNORE : HEADERINST_FORWARD;
! 1807: default:
! 1808: return HEADERINST_FORWARD;
! 1809: }
! 1810: }
! 1811:
! 1812: static ssize_t http2_send(struct connectdata *conn, int sockindex,
! 1813: const void *mem, size_t len, CURLcode *err)
! 1814: {
! 1815: /*
! 1816: * Currently, we send request in this function, but this function is also
! 1817: * used to send request body. It would be nice to add dedicated function for
! 1818: * request.
! 1819: */
! 1820: int rv;
! 1821: struct http_conn *httpc = &conn->proto.httpc;
! 1822: struct HTTP *stream = conn->data->req.protop;
! 1823: nghttp2_nv *nva = NULL;
! 1824: size_t nheader;
! 1825: size_t i;
! 1826: size_t authority_idx;
! 1827: char *hdbuf = (char *)mem;
! 1828: char *end, *line_end;
! 1829: nghttp2_data_provider data_prd;
! 1830: int32_t stream_id;
! 1831: nghttp2_session *h2 = httpc->h2;
! 1832: nghttp2_priority_spec pri_spec;
! 1833:
! 1834: (void)sockindex;
! 1835:
! 1836: H2BUGF(infof(conn->data, "http2_send len=%zu\n", len));
! 1837:
! 1838: if(stream->stream_id != -1) {
! 1839: if(stream->close_handled) {
! 1840: infof(conn->data, "stream %d closed\n", stream->stream_id);
! 1841: *err = CURLE_HTTP2_STREAM;
! 1842: return -1;
! 1843: }
! 1844: else if(stream->closed) {
! 1845: return http2_handle_stream_close(conn, conn->data, stream, err);
! 1846: }
! 1847: /* If stream_id != -1, we have dispatched request HEADERS, and now
! 1848: are going to send or sending request body in DATA frame */
! 1849: stream->upload_mem = mem;
! 1850: stream->upload_len = len;
! 1851: rv = nghttp2_session_resume_data(h2, stream->stream_id);
! 1852: if(nghttp2_is_fatal(rv)) {
! 1853: *err = CURLE_SEND_ERROR;
! 1854: return -1;
! 1855: }
! 1856: rv = h2_session_send(conn->data, h2);
! 1857: if(nghttp2_is_fatal(rv)) {
! 1858: *err = CURLE_SEND_ERROR;
! 1859: return -1;
! 1860: }
! 1861: len -= stream->upload_len;
! 1862:
! 1863: /* Nullify here because we call nghttp2_session_send() and they
! 1864: might refer to the old buffer. */
! 1865: stream->upload_mem = NULL;
! 1866: stream->upload_len = 0;
! 1867:
! 1868: if(should_close_session(httpc)) {
! 1869: H2BUGF(infof(conn->data, "http2_send: nothing to do in this session\n"));
! 1870: *err = CURLE_HTTP2;
! 1871: return -1;
! 1872: }
! 1873:
! 1874: if(stream->upload_left) {
! 1875: /* we are sure that we have more data to send here. Calling the
! 1876: following API will make nghttp2_session_want_write() return
! 1877: nonzero if remote window allows it, which then libcurl checks
! 1878: socket is writable or not. See http2_perform_getsock(). */
! 1879: nghttp2_session_resume_data(h2, stream->stream_id);
! 1880: }
! 1881:
! 1882: H2BUGF(infof(conn->data, "http2_send returns %zu for stream %u\n", len,
! 1883: stream->stream_id));
! 1884: return len;
! 1885: }
! 1886:
! 1887: /* Calculate number of headers contained in [mem, mem + len) */
! 1888: /* Here, we assume the curl http code generate *correct* HTTP header
! 1889: field block */
! 1890: nheader = 0;
! 1891: for(i = 1; i < len; ++i) {
! 1892: if(hdbuf[i] == '\n' && hdbuf[i - 1] == '\r') {
! 1893: ++nheader;
! 1894: ++i;
! 1895: }
! 1896: }
! 1897: if(nheader < 2)
! 1898: goto fail;
! 1899:
! 1900: /* We counted additional 2 \r\n in the first and last line. We need 3
! 1901: new headers: :method, :path and :scheme. Therefore we need one
! 1902: more space. */
! 1903: nheader += 1;
! 1904: nva = malloc(sizeof(nghttp2_nv) * nheader);
! 1905: if(nva == NULL) {
! 1906: *err = CURLE_OUT_OF_MEMORY;
! 1907: return -1;
! 1908: }
! 1909:
! 1910: /* Extract :method, :path from request line
! 1911: We do line endings with CRLF so checking for CR is enough */
! 1912: line_end = memchr(hdbuf, '\r', len);
! 1913: if(!line_end)
! 1914: goto fail;
! 1915:
! 1916: /* Method does not contain spaces */
! 1917: end = memchr(hdbuf, ' ', line_end - hdbuf);
! 1918: if(!end || end == hdbuf)
! 1919: goto fail;
! 1920: nva[0].name = (unsigned char *)":method";
! 1921: nva[0].namelen = strlen((char *)nva[0].name);
! 1922: nva[0].value = (unsigned char *)hdbuf;
! 1923: nva[0].valuelen = (size_t)(end - hdbuf);
! 1924: nva[0].flags = NGHTTP2_NV_FLAG_NONE;
! 1925: if(HEADER_OVERFLOW(nva[0])) {
! 1926: failf(conn->data, "Failed sending HTTP request: Header overflow");
! 1927: goto fail;
! 1928: }
! 1929:
! 1930: hdbuf = end + 1;
! 1931:
! 1932: /* Path may contain spaces so scan backwards */
! 1933: end = NULL;
! 1934: for(i = (size_t)(line_end - hdbuf); i; --i) {
! 1935: if(hdbuf[i - 1] == ' ') {
! 1936: end = &hdbuf[i - 1];
! 1937: break;
! 1938: }
! 1939: }
! 1940: if(!end || end == hdbuf)
! 1941: goto fail;
! 1942: nva[1].name = (unsigned char *)":path";
! 1943: nva[1].namelen = strlen((char *)nva[1].name);
! 1944: nva[1].value = (unsigned char *)hdbuf;
! 1945: nva[1].valuelen = (size_t)(end - hdbuf);
! 1946: nva[1].flags = NGHTTP2_NV_FLAG_NONE;
! 1947: if(HEADER_OVERFLOW(nva[1])) {
! 1948: failf(conn->data, "Failed sending HTTP request: Header overflow");
! 1949: goto fail;
! 1950: }
! 1951:
! 1952: nva[2].name = (unsigned char *)":scheme";
! 1953: nva[2].namelen = strlen((char *)nva[2].name);
! 1954: if(conn->handler->flags & PROTOPT_SSL)
! 1955: nva[2].value = (unsigned char *)"https";
! 1956: else
! 1957: nva[2].value = (unsigned char *)"http";
! 1958: nva[2].valuelen = strlen((char *)nva[2].value);
! 1959: nva[2].flags = NGHTTP2_NV_FLAG_NONE;
! 1960: if(HEADER_OVERFLOW(nva[2])) {
! 1961: failf(conn->data, "Failed sending HTTP request: Header overflow");
! 1962: goto fail;
! 1963: }
! 1964:
! 1965: authority_idx = 0;
! 1966: i = 3;
! 1967: while(i < nheader) {
! 1968: size_t hlen;
! 1969:
! 1970: hdbuf = line_end + 2;
! 1971:
! 1972: /* check for next CR, but only within the piece of data left in the given
! 1973: buffer */
! 1974: line_end = memchr(hdbuf, '\r', len - (hdbuf - (char *)mem));
! 1975: if(!line_end || (line_end == hdbuf))
! 1976: goto fail;
! 1977:
! 1978: /* header continuation lines are not supported */
! 1979: if(*hdbuf == ' ' || *hdbuf == '\t')
! 1980: goto fail;
! 1981:
! 1982: for(end = hdbuf; end < line_end && *end != ':'; ++end)
! 1983: ;
! 1984: if(end == hdbuf || end == line_end)
! 1985: goto fail;
! 1986: hlen = end - hdbuf;
! 1987:
! 1988: if(hlen == 4 && strncasecompare("host", hdbuf, 4)) {
! 1989: authority_idx = i;
! 1990: nva[i].name = (unsigned char *)":authority";
! 1991: nva[i].namelen = strlen((char *)nva[i].name);
! 1992: }
! 1993: else {
! 1994: nva[i].namelen = (size_t)(end - hdbuf);
! 1995: /* Lower case the header name for HTTP/2 */
! 1996: Curl_strntolower((char *)hdbuf, hdbuf, nva[i].namelen);
! 1997: nva[i].name = (unsigned char *)hdbuf;
! 1998: }
! 1999: hdbuf = end + 1;
! 2000: while(*hdbuf == ' ' || *hdbuf == '\t')
! 2001: ++hdbuf;
! 2002: end = line_end;
! 2003:
! 2004: switch(inspect_header((const char *)nva[i].name, nva[i].namelen, hdbuf,
! 2005: end - hdbuf)) {
! 2006: case HEADERINST_IGNORE:
! 2007: /* skip header fields prohibited by HTTP/2 specification. */
! 2008: --nheader;
! 2009: continue;
! 2010: case HEADERINST_TE_TRAILERS:
! 2011: nva[i].value = (uint8_t*)"trailers";
! 2012: nva[i].valuelen = sizeof("trailers") - 1;
! 2013: break;
! 2014: default:
! 2015: nva[i].value = (unsigned char *)hdbuf;
! 2016: nva[i].valuelen = (size_t)(end - hdbuf);
! 2017: }
! 2018:
! 2019: nva[i].flags = NGHTTP2_NV_FLAG_NONE;
! 2020: if(HEADER_OVERFLOW(nva[i])) {
! 2021: failf(conn->data, "Failed sending HTTP request: Header overflow");
! 2022: goto fail;
! 2023: }
! 2024: ++i;
! 2025: }
! 2026:
! 2027: /* :authority must come before non-pseudo header fields */
! 2028: if(authority_idx != 0 && authority_idx != AUTHORITY_DST_IDX) {
! 2029: nghttp2_nv authority = nva[authority_idx];
! 2030: for(i = authority_idx; i > AUTHORITY_DST_IDX; --i) {
! 2031: nva[i] = nva[i - 1];
! 2032: }
! 2033: nva[i] = authority;
! 2034: }
! 2035:
! 2036: /* Warn stream may be rejected if cumulative length of headers is too large.
! 2037: It appears nghttp2 will not send a header frame larger than 64KB. */
! 2038: #define MAX_ACC 60000 /* <64KB to account for some overhead */
! 2039: {
! 2040: size_t acc = 0;
! 2041:
! 2042: for(i = 0; i < nheader; ++i) {
! 2043: acc += nva[i].namelen + nva[i].valuelen;
! 2044:
! 2045: H2BUGF(infof(conn->data, "h2 header: %.*s:%.*s\n",
! 2046: nva[i].namelen, nva[i].name,
! 2047: nva[i].valuelen, nva[i].value));
! 2048: }
! 2049:
! 2050: if(acc > MAX_ACC) {
! 2051: infof(conn->data, "http2_send: Warning: The cumulative length of all "
! 2052: "headers exceeds %zu bytes and that could cause the "
! 2053: "stream to be rejected.\n", MAX_ACC);
! 2054: }
! 2055: }
! 2056:
! 2057: h2_pri_spec(conn->data, &pri_spec);
! 2058:
! 2059: switch(conn->data->set.httpreq) {
! 2060: case HTTPREQ_POST:
! 2061: case HTTPREQ_POST_FORM:
! 2062: case HTTPREQ_POST_MIME:
! 2063: case HTTPREQ_PUT:
! 2064: if(conn->data->state.infilesize != -1)
! 2065: stream->upload_left = conn->data->state.infilesize;
! 2066: else
! 2067: /* data sending without specifying the data amount up front */
! 2068: stream->upload_left = -1; /* unknown, but not zero */
! 2069:
! 2070: data_prd.read_callback = data_source_read_callback;
! 2071: data_prd.source.ptr = NULL;
! 2072: stream_id = nghttp2_submit_request(h2, &pri_spec, nva, nheader,
! 2073: &data_prd, conn->data);
! 2074: break;
! 2075: default:
! 2076: stream_id = nghttp2_submit_request(h2, &pri_spec, nva, nheader,
! 2077: NULL, conn->data);
! 2078: }
! 2079:
! 2080: Curl_safefree(nva);
! 2081:
! 2082: if(stream_id < 0) {
! 2083: H2BUGF(infof(conn->data, "http2_send() send error\n"));
! 2084: *err = CURLE_SEND_ERROR;
! 2085: return -1;
! 2086: }
! 2087:
! 2088: infof(conn->data, "Using Stream ID: %x (easy handle %p)\n",
! 2089: stream_id, (void *)conn->data);
! 2090: stream->stream_id = stream_id;
! 2091:
! 2092: /* this does not call h2_session_send() since there can not have been any
! 2093: * priority upodate since the nghttp2_submit_request() call above */
! 2094: rv = nghttp2_session_send(h2);
! 2095:
! 2096: if(rv != 0) {
! 2097: *err = CURLE_SEND_ERROR;
! 2098: return -1;
! 2099: }
! 2100:
! 2101: if(should_close_session(httpc)) {
! 2102: H2BUGF(infof(conn->data, "http2_send: nothing to do in this session\n"));
! 2103: *err = CURLE_HTTP2;
! 2104: return -1;
! 2105: }
! 2106:
! 2107: /* If whole HEADERS frame was sent off to the underlying socket, the nghttp2
! 2108: library calls data_source_read_callback. But only it found that no data
! 2109: available, so it deferred the DATA transmission. Which means that
! 2110: nghttp2_session_want_write() returns 0 on http2_perform_getsock(), which
! 2111: results that no writable socket check is performed. To workaround this,
! 2112: we issue nghttp2_session_resume_data() here to bring back DATA
! 2113: transmission from deferred state. */
! 2114: nghttp2_session_resume_data(h2, stream->stream_id);
! 2115:
! 2116: return len;
! 2117:
! 2118: fail:
! 2119: free(nva);
! 2120: *err = CURLE_SEND_ERROR;
! 2121: return -1;
! 2122: }
! 2123:
! 2124: CURLcode Curl_http2_setup(struct connectdata *conn)
! 2125: {
! 2126: CURLcode result;
! 2127: struct http_conn *httpc = &conn->proto.httpc;
! 2128: struct HTTP *stream = conn->data->req.protop;
! 2129:
! 2130: stream->stream_id = -1;
! 2131:
! 2132: if(!stream->header_recvbuf) {
! 2133: stream->header_recvbuf = Curl_add_buffer_init();
! 2134: if(!stream->header_recvbuf)
! 2135: return CURLE_OUT_OF_MEMORY;
! 2136: }
! 2137:
! 2138: if((conn->handler == &Curl_handler_http2_ssl) ||
! 2139: (conn->handler == &Curl_handler_http2))
! 2140: return CURLE_OK; /* already done */
! 2141:
! 2142: if(conn->handler->flags & PROTOPT_SSL)
! 2143: conn->handler = &Curl_handler_http2_ssl;
! 2144: else
! 2145: conn->handler = &Curl_handler_http2;
! 2146:
! 2147: result = http2_init(conn);
! 2148: if(result) {
! 2149: Curl_add_buffer_free(&stream->header_recvbuf);
! 2150: return result;
! 2151: }
! 2152:
! 2153: infof(conn->data, "Using HTTP2, server supports multi-use\n");
! 2154: stream->upload_left = 0;
! 2155: stream->upload_mem = NULL;
! 2156: stream->upload_len = 0;
! 2157:
! 2158: httpc->inbuflen = 0;
! 2159: httpc->nread_inbuf = 0;
! 2160:
! 2161: httpc->pause_stream_id = 0;
! 2162: httpc->drain_total = 0;
! 2163:
! 2164: conn->bits.multiplex = TRUE; /* at least potentially multiplexed */
! 2165: conn->httpversion = 20;
! 2166: conn->bundle->multiuse = BUNDLE_MULTIPLEX;
! 2167:
! 2168: infof(conn->data, "Connection state changed (HTTP/2 confirmed)\n");
! 2169: multi_connchanged(conn->data->multi);
! 2170:
! 2171: return CURLE_OK;
! 2172: }
! 2173:
! 2174: CURLcode Curl_http2_switched(struct connectdata *conn,
! 2175: const char *mem, size_t nread)
! 2176: {
! 2177: CURLcode result;
! 2178: struct http_conn *httpc = &conn->proto.httpc;
! 2179: int rv;
! 2180: ssize_t nproc;
! 2181: struct Curl_easy *data = conn->data;
! 2182: struct HTTP *stream = conn->data->req.protop;
! 2183:
! 2184: result = Curl_http2_setup(conn);
! 2185: if(result)
! 2186: return result;
! 2187:
! 2188: httpc->recv_underlying = conn->recv[FIRSTSOCKET];
! 2189: httpc->send_underlying = conn->send[FIRSTSOCKET];
! 2190: conn->recv[FIRSTSOCKET] = http2_recv;
! 2191: conn->send[FIRSTSOCKET] = http2_send;
! 2192:
! 2193: if(conn->data->req.upgr101 == UPGR101_RECEIVED) {
! 2194: /* stream 1 is opened implicitly on upgrade */
! 2195: stream->stream_id = 1;
! 2196: /* queue SETTINGS frame (again) */
! 2197: rv = nghttp2_session_upgrade(httpc->h2, httpc->binsettings,
! 2198: httpc->binlen, NULL);
! 2199: if(rv != 0) {
! 2200: failf(data, "nghttp2_session_upgrade() failed: %s(%d)",
! 2201: nghttp2_strerror(rv), rv);
! 2202: return CURLE_HTTP2;
! 2203: }
! 2204:
! 2205: rv = nghttp2_session_set_stream_user_data(httpc->h2,
! 2206: stream->stream_id,
! 2207: data);
! 2208: if(rv) {
! 2209: infof(data, "http/2: failed to set user_data for stream %d!\n",
! 2210: stream->stream_id);
! 2211: DEBUGASSERT(0);
! 2212: }
! 2213: }
! 2214: else {
! 2215: populate_settings(conn, httpc);
! 2216:
! 2217: /* stream ID is unknown at this point */
! 2218: stream->stream_id = -1;
! 2219: rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE,
! 2220: httpc->local_settings,
! 2221: httpc->local_settings_num);
! 2222: if(rv != 0) {
! 2223: failf(data, "nghttp2_submit_settings() failed: %s(%d)",
! 2224: nghttp2_strerror(rv), rv);
! 2225: return CURLE_HTTP2;
! 2226: }
! 2227: }
! 2228:
! 2229: rv = nghttp2_session_set_local_window_size(httpc->h2, NGHTTP2_FLAG_NONE, 0,
! 2230: HTTP2_HUGE_WINDOW_SIZE);
! 2231: if(rv != 0) {
! 2232: failf(data, "nghttp2_session_set_local_window_size() failed: %s(%d)",
! 2233: nghttp2_strerror(rv), rv);
! 2234: return CURLE_HTTP2;
! 2235: }
! 2236:
! 2237: /* we are going to copy mem to httpc->inbuf. This is required since
! 2238: mem is part of buffer pointed by stream->mem, and callbacks
! 2239: called by nghttp2_session_mem_recv() will write stream specific
! 2240: data into stream->mem, overwriting data already there. */
! 2241: if(H2_BUFSIZE < nread) {
! 2242: failf(data, "connection buffer size is too small to store data following "
! 2243: "HTTP Upgrade response header: buflen=%zu, datalen=%zu",
! 2244: H2_BUFSIZE, nread);
! 2245: return CURLE_HTTP2;
! 2246: }
! 2247:
! 2248: infof(conn->data, "Copying HTTP/2 data in stream buffer to connection buffer"
! 2249: " after upgrade: len=%zu\n",
! 2250: nread);
! 2251:
! 2252: if(nread)
! 2253: memcpy(httpc->inbuf, mem, nread);
! 2254: httpc->inbuflen = nread;
! 2255:
! 2256: nproc = nghttp2_session_mem_recv(httpc->h2, (const uint8_t *)httpc->inbuf,
! 2257: httpc->inbuflen);
! 2258:
! 2259: if(nghttp2_is_fatal((int)nproc)) {
! 2260: failf(data, "nghttp2_session_mem_recv() failed: %s(%d)",
! 2261: nghttp2_strerror((int)nproc), (int)nproc);
! 2262: return CURLE_HTTP2;
! 2263: }
! 2264:
! 2265: H2BUGF(infof(data, "nghttp2_session_mem_recv() returns %zd\n", nproc));
! 2266:
! 2267: if((ssize_t)nread == nproc) {
! 2268: httpc->inbuflen = 0;
! 2269: httpc->nread_inbuf = 0;
! 2270: }
! 2271: else {
! 2272: httpc->nread_inbuf += nproc;
! 2273: }
! 2274:
! 2275: /* Try to send some frames since we may read SETTINGS already. */
! 2276: rv = h2_session_send(data, httpc->h2);
! 2277:
! 2278: if(rv != 0) {
! 2279: failf(data, "nghttp2_session_send() failed: %s(%d)",
! 2280: nghttp2_strerror(rv), rv);
! 2281: return CURLE_HTTP2;
! 2282: }
! 2283:
! 2284: if(should_close_session(httpc)) {
! 2285: H2BUGF(infof(data,
! 2286: "nghttp2_session_send(): nothing to do in this session\n"));
! 2287: return CURLE_HTTP2;
! 2288: }
! 2289:
! 2290: return CURLE_OK;
! 2291: }
! 2292:
! 2293: CURLcode Curl_http2_stream_pause(struct Curl_easy *data, bool pause)
! 2294: {
! 2295: DEBUGASSERT(data);
! 2296: DEBUGASSERT(data->conn);
! 2297: /* if it isn't HTTP/2, we're done */
! 2298: if(!data->conn->proto.httpc.h2)
! 2299: return CURLE_OK;
! 2300: #ifdef NGHTTP2_HAS_SET_LOCAL_WINDOW_SIZE
! 2301: else {
! 2302: struct HTTP *stream = data->req.protop;
! 2303: struct http_conn *httpc = &data->conn->proto.httpc;
! 2304: uint32_t window = !pause * HTTP2_HUGE_WINDOW_SIZE;
! 2305: int rv = nghttp2_session_set_local_window_size(httpc->h2,
! 2306: NGHTTP2_FLAG_NONE,
! 2307: stream->stream_id,
! 2308: window);
! 2309: if(rv) {
! 2310: failf(data, "nghttp2_session_set_local_window_size() failed: %s(%d)",
! 2311: nghttp2_strerror(rv), rv);
! 2312: return CURLE_HTTP2;
! 2313: }
! 2314:
! 2315: /* make sure the window update gets sent */
! 2316: rv = h2_session_send(data, httpc->h2);
! 2317: if(rv)
! 2318: return CURLE_SEND_ERROR;
! 2319:
! 2320: DEBUGF(infof(data, "Set HTTP/2 window size to %u for stream %u\n",
! 2321: window, stream->stream_id));
! 2322:
! 2323: #ifdef DEBUGBUILD
! 2324: {
! 2325: /* read out the stream local window again */
! 2326: uint32_t window2 =
! 2327: nghttp2_session_get_stream_local_window_size(httpc->h2,
! 2328: stream->stream_id);
! 2329: DEBUGF(infof(data, "HTTP/2 window size is now %u for stream %u\n",
! 2330: window2, stream->stream_id));
! 2331: }
! 2332: #endif
! 2333: }
! 2334: #endif
! 2335: return CURLE_OK;
! 2336: }
! 2337:
! 2338: CURLcode Curl_http2_add_child(struct Curl_easy *parent,
! 2339: struct Curl_easy *child,
! 2340: bool exclusive)
! 2341: {
! 2342: if(parent) {
! 2343: struct Curl_http2_dep **tail;
! 2344: struct Curl_http2_dep *dep = calloc(1, sizeof(struct Curl_http2_dep));
! 2345: if(!dep)
! 2346: return CURLE_OUT_OF_MEMORY;
! 2347: dep->data = child;
! 2348:
! 2349: if(parent->set.stream_dependents && exclusive) {
! 2350: struct Curl_http2_dep *node = parent->set.stream_dependents;
! 2351: while(node) {
! 2352: node->data->set.stream_depends_on = child;
! 2353: node = node->next;
! 2354: }
! 2355:
! 2356: tail = &child->set.stream_dependents;
! 2357: while(*tail)
! 2358: tail = &(*tail)->next;
! 2359:
! 2360: DEBUGASSERT(!*tail);
! 2361: *tail = parent->set.stream_dependents;
! 2362: parent->set.stream_dependents = 0;
! 2363: }
! 2364:
! 2365: tail = &parent->set.stream_dependents;
! 2366: while(*tail) {
! 2367: (*tail)->data->set.stream_depends_e = FALSE;
! 2368: tail = &(*tail)->next;
! 2369: }
! 2370:
! 2371: DEBUGASSERT(!*tail);
! 2372: *tail = dep;
! 2373: }
! 2374:
! 2375: child->set.stream_depends_on = parent;
! 2376: child->set.stream_depends_e = exclusive;
! 2377: return CURLE_OK;
! 2378: }
! 2379:
! 2380: void Curl_http2_remove_child(struct Curl_easy *parent, struct Curl_easy *child)
! 2381: {
! 2382: struct Curl_http2_dep *last = 0;
! 2383: struct Curl_http2_dep *data = parent->set.stream_dependents;
! 2384: DEBUGASSERT(child->set.stream_depends_on == parent);
! 2385:
! 2386: while(data && data->data != child) {
! 2387: last = data;
! 2388: data = data->next;
! 2389: }
! 2390:
! 2391: DEBUGASSERT(data);
! 2392:
! 2393: if(data) {
! 2394: if(last) {
! 2395: last->next = data->next;
! 2396: }
! 2397: else {
! 2398: parent->set.stream_dependents = data->next;
! 2399: }
! 2400: free(data);
! 2401: }
! 2402:
! 2403: child->set.stream_depends_on = 0;
! 2404: child->set.stream_depends_e = FALSE;
! 2405: }
! 2406:
! 2407: void Curl_http2_cleanup_dependencies(struct Curl_easy *data)
! 2408: {
! 2409: while(data->set.stream_dependents) {
! 2410: struct Curl_easy *tmp = data->set.stream_dependents->data;
! 2411: Curl_http2_remove_child(data, tmp);
! 2412: if(data->set.stream_depends_on)
! 2413: Curl_http2_add_child(data->set.stream_depends_on, tmp, FALSE);
! 2414: }
! 2415:
! 2416: if(data->set.stream_depends_on)
! 2417: Curl_http2_remove_child(data->set.stream_depends_on, data);
! 2418: }
! 2419:
! 2420: /* Only call this function for a transfer that already got a HTTP/2
! 2421: CURLE_HTTP2_STREAM error! */
! 2422: bool Curl_h2_http_1_1_error(struct connectdata *conn)
! 2423: {
! 2424: struct http_conn *httpc = &conn->proto.httpc;
! 2425: return (httpc->error_code == NGHTTP2_HTTP_1_1_REQUIRED);
! 2426: }
! 2427:
! 2428: #else /* !USE_NGHTTP2 */
! 2429:
! 2430: /* Satisfy external references even if http2 is not compiled in. */
! 2431: #include <curl/curl.h>
! 2432:
! 2433: char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num)
! 2434: {
! 2435: (void) h;
! 2436: (void) num;
! 2437: return NULL;
! 2438: }
! 2439:
! 2440: char *curl_pushheader_byname(struct curl_pushheaders *h, const char *header)
! 2441: {
! 2442: (void) h;
! 2443: (void) header;
! 2444: return NULL;
! 2445: }
! 2446:
! 2447: #endif /* USE_NGHTTP2 */
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