mirror of
https://github.com/curl/curl.git
synced 2024-12-21 06:50:10 +08:00
7208ff6534
It is not actually used anymore and only contained a dummy struct field. Remove all traces and uses of it. Closes #13927
2914 lines
90 KiB
C
2914 lines
90 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef USE_NGHTTP2
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#include <stdint.h>
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#include <nghttp2/nghttp2.h>
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#include "urldata.h"
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#include "bufq.h"
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#include "hash.h"
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#include "http1.h"
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#include "http2.h"
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#include "http.h"
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#include "sendf.h"
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#include "select.h"
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#include "curl_base64.h"
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#include "strcase.h"
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#include "multiif.h"
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#include "url.h"
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#include "urlapi-int.h"
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#include "cfilters.h"
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#include "connect.h"
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#include "rand.h"
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#include "strtoofft.h"
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#include "strdup.h"
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#include "transfer.h"
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#include "dynbuf.h"
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#include "headers.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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#if (NGHTTP2_VERSION_NUM < 0x010c00)
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#error too old nghttp2 version, upgrade!
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#endif
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#ifdef CURL_DISABLE_VERBOSE_STRINGS
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#define nghttp2_session_callbacks_set_error_callback(x,y)
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#endif
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#if (NGHTTP2_VERSION_NUM >= 0x010c00)
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#define NGHTTP2_HAS_SET_LOCAL_WINDOW_SIZE 1
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#endif
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/* buffer dimensioning:
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* use 16K as chunk size, as that fits H2 DATA frames well */
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#define H2_CHUNK_SIZE (16 * 1024)
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/* this is how much we want "in flight" for a stream */
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#define H2_STREAM_WINDOW_SIZE (10 * 1024 * 1024)
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/* on receiving from TLS, we prep for holding a full stream window */
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#define H2_NW_RECV_CHUNKS (H2_STREAM_WINDOW_SIZE / H2_CHUNK_SIZE)
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/* on send into TLS, we just want to accumulate small frames */
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#define H2_NW_SEND_CHUNKS 1
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/* stream recv/send chunks are a result of window / chunk sizes */
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#define H2_STREAM_RECV_CHUNKS (H2_STREAM_WINDOW_SIZE / H2_CHUNK_SIZE)
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/* keep smaller stream upload buffer (default h2 window size) to have
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* our progress bars and "upload done" reporting closer to reality */
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#define H2_STREAM_SEND_CHUNKS ((64 * 1024) / H2_CHUNK_SIZE)
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/* spare chunks we keep for a full window */
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#define H2_STREAM_POOL_SPARES (H2_STREAM_WINDOW_SIZE / H2_CHUNK_SIZE)
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/* We need to accommodate the max number of streams with their window
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* sizes on the overall connection. Streams might become PAUSED which
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* will block their received QUOTA in the connection window. And if we
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* run out of space, the server is blocked from sending us any data.
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* See #10988 for an issue with this. */
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#define HTTP2_HUGE_WINDOW_SIZE (100 * H2_STREAM_WINDOW_SIZE)
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#define H2_SETTINGS_IV_LEN 3
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#define H2_BINSETTINGS_LEN 80
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static size_t populate_settings(nghttp2_settings_entry *iv,
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struct Curl_easy *data)
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{
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iv[0].settings_id = NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS;
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iv[0].value = Curl_multi_max_concurrent_streams(data->multi);
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iv[1].settings_id = NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE;
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iv[1].value = H2_STREAM_WINDOW_SIZE;
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iv[2].settings_id = NGHTTP2_SETTINGS_ENABLE_PUSH;
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iv[2].value = data->multi->push_cb != NULL;
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return 3;
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}
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static ssize_t populate_binsettings(uint8_t *binsettings,
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struct Curl_easy *data)
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{
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nghttp2_settings_entry iv[H2_SETTINGS_IV_LEN];
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size_t ivlen;
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ivlen = populate_settings(iv, data);
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/* this returns number of bytes it wrote or a negative number on error. */
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return nghttp2_pack_settings_payload(binsettings, H2_BINSETTINGS_LEN,
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iv, ivlen);
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}
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struct cf_h2_ctx {
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nghttp2_session *h2;
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/* The easy handle used in the current filter call, cleared at return */
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struct cf_call_data call_data;
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struct bufq inbufq; /* network input */
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struct bufq outbufq; /* network output */
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struct bufc_pool stream_bufcp; /* spares for stream buffers */
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struct dynbuf scratch; /* scratch buffer for temp use */
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struct Curl_hash streams; /* hash of `data->id` to `h2_stream_ctx` */
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size_t drain_total; /* sum of all stream's UrlState drain */
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uint32_t max_concurrent_streams;
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uint32_t goaway_error; /* goaway error code from server */
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int32_t remote_max_sid; /* max id processed by server */
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int32_t local_max_sid; /* max id processed by us */
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BIT(conn_closed);
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BIT(rcvd_goaway);
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BIT(sent_goaway);
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BIT(enable_push);
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BIT(shutdown);
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BIT(nw_out_blocked);
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};
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/* How to access `call_data` from a cf_h2 filter */
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#undef CF_CTX_CALL_DATA
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#define CF_CTX_CALL_DATA(cf) \
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((struct cf_h2_ctx *)(cf)->ctx)->call_data
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static void cf_h2_ctx_clear(struct cf_h2_ctx *ctx)
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{
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struct cf_call_data save = ctx->call_data;
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if(ctx->h2) {
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nghttp2_session_del(ctx->h2);
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}
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Curl_bufq_free(&ctx->inbufq);
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Curl_bufq_free(&ctx->outbufq);
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Curl_bufcp_free(&ctx->stream_bufcp);
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Curl_dyn_free(&ctx->scratch);
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Curl_hash_clean(&ctx->streams);
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Curl_hash_destroy(&ctx->streams);
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memset(ctx, 0, sizeof(*ctx));
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ctx->call_data = save;
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}
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static void cf_h2_ctx_free(struct cf_h2_ctx *ctx)
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{
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if(ctx) {
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cf_h2_ctx_clear(ctx);
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free(ctx);
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}
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}
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static CURLcode h2_progress_egress(struct Curl_cfilter *cf,
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struct Curl_easy *data);
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/**
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* All about the H2 internals of a stream
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*/
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struct h2_stream_ctx {
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struct bufq recvbuf; /* response buffer */
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struct bufq sendbuf; /* request buffer */
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struct h1_req_parser h1; /* parsing the request */
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struct dynhds resp_trailers; /* response trailer fields */
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size_t resp_hds_len; /* amount of response header bytes in recvbuf */
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size_t upload_blocked_len;
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curl_off_t upload_left; /* number of request bytes left to upload */
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curl_off_t nrcvd_data; /* number of DATA bytes received */
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char **push_headers; /* allocated array */
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size_t push_headers_used; /* number of entries filled in */
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size_t push_headers_alloc; /* number of entries allocated */
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int status_code; /* HTTP response status code */
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uint32_t error; /* stream error code */
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CURLcode xfer_result; /* Result of writing out response */
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uint32_t local_window_size; /* the local recv window size */
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int32_t id; /* HTTP/2 protocol identifier for stream */
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BIT(resp_hds_complete); /* we have a complete, final response */
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BIT(closed); /* TRUE on stream close */
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BIT(reset); /* TRUE on stream reset */
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BIT(close_handled); /* TRUE if stream closure is handled by libcurl */
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BIT(bodystarted);
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BIT(send_closed); /* transfer is done sending, we might have still
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buffered data in stream->sendbuf to upload. */
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};
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#define H2_STREAM_CTX(ctx,data) ((struct h2_stream_ctx *)(\
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data? Curl_hash_offt_get(&(ctx)->streams, (data)->id) : NULL))
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static struct h2_stream_ctx *h2_stream_ctx_create(struct cf_h2_ctx *ctx)
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{
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struct h2_stream_ctx *stream;
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(void)ctx;
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stream = calloc(1, sizeof(*stream));
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if(!stream)
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return NULL;
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stream->id = -1;
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Curl_bufq_initp(&stream->sendbuf, &ctx->stream_bufcp,
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H2_STREAM_SEND_CHUNKS, BUFQ_OPT_NONE);
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Curl_h1_req_parse_init(&stream->h1, H1_PARSE_DEFAULT_MAX_LINE_LEN);
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Curl_dynhds_init(&stream->resp_trailers, 0, DYN_HTTP_REQUEST);
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stream->resp_hds_len = 0;
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stream->bodystarted = FALSE;
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stream->status_code = -1;
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stream->closed = FALSE;
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stream->close_handled = FALSE;
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stream->error = NGHTTP2_NO_ERROR;
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stream->local_window_size = H2_STREAM_WINDOW_SIZE;
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stream->upload_left = 0;
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stream->nrcvd_data = 0;
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return stream;
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}
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static void free_push_headers(struct h2_stream_ctx *stream)
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{
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size_t i;
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for(i = 0; i<stream->push_headers_used; i++)
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free(stream->push_headers[i]);
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Curl_safefree(stream->push_headers);
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stream->push_headers_used = 0;
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}
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static void h2_stream_ctx_free(struct h2_stream_ctx *stream)
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{
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Curl_bufq_free(&stream->sendbuf);
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Curl_h1_req_parse_free(&stream->h1);
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Curl_dynhds_free(&stream->resp_trailers);
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free_push_headers(stream);
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free(stream);
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}
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static void h2_stream_hash_free(void *stream)
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{
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DEBUGASSERT(stream);
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h2_stream_ctx_free((struct h2_stream_ctx *)stream);
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}
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/*
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* Mark this transfer to get "drained".
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*/
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static void drain_stream(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct h2_stream_ctx *stream)
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{
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unsigned char bits;
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(void)cf;
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bits = CURL_CSELECT_IN;
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if(!stream->send_closed &&
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(stream->upload_left || stream->upload_blocked_len))
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bits |= CURL_CSELECT_OUT;
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if(data->state.select_bits != bits) {
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CURL_TRC_CF(data, cf, "[%d] DRAIN select_bits=%x",
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stream->id, bits);
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data->state.select_bits = bits;
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Curl_expire(data, 0, EXPIRE_RUN_NOW);
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}
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}
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static CURLcode http2_data_setup(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct h2_stream_ctx **pstream)
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{
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struct cf_h2_ctx *ctx = cf->ctx;
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struct h2_stream_ctx *stream;
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(void)cf;
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DEBUGASSERT(data);
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stream = H2_STREAM_CTX(ctx, data);
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if(stream) {
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*pstream = stream;
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return CURLE_OK;
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}
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stream = h2_stream_ctx_create(ctx);
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if(!stream)
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return CURLE_OUT_OF_MEMORY;
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if(!Curl_hash_offt_set(&ctx->streams, data->id, stream)) {
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h2_stream_ctx_free(stream);
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return CURLE_OUT_OF_MEMORY;
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}
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*pstream = stream;
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return CURLE_OK;
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}
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static void http2_data_done(struct Curl_cfilter *cf, struct Curl_easy *data)
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{
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struct cf_h2_ctx *ctx = cf->ctx;
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struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
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DEBUGASSERT(ctx);
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if(!stream)
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return;
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if(ctx->h2) {
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bool flush_egress = FALSE;
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/* returns error if stream not known, which is fine here */
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(void)nghttp2_session_set_stream_user_data(ctx->h2, stream->id, NULL);
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if(!stream->closed && stream->id > 0) {
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/* RST_STREAM */
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CURL_TRC_CF(data, cf, "[%d] premature DATA_DONE, RST stream",
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stream->id);
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stream->closed = TRUE;
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stream->reset = TRUE;
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stream->send_closed = TRUE;
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nghttp2_submit_rst_stream(ctx->h2, NGHTTP2_FLAG_NONE,
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stream->id, NGHTTP2_STREAM_CLOSED);
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flush_egress = TRUE;
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}
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if(flush_egress)
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nghttp2_session_send(ctx->h2);
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}
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Curl_hash_offt_remove(&ctx->streams, data->id);
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}
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static int h2_client_new(struct Curl_cfilter *cf,
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nghttp2_session_callbacks *cbs)
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{
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struct cf_h2_ctx *ctx = cf->ctx;
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nghttp2_option *o;
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int rc = nghttp2_option_new(&o);
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if(rc)
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return rc;
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/* We handle window updates ourself to enforce buffer limits */
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nghttp2_option_set_no_auto_window_update(o, 1);
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#if NGHTTP2_VERSION_NUM >= 0x013200
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/* with 1.50.0 */
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/* turn off RFC 9113 leading and trailing white spaces validation against
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HTTP field value. */
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nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation(o, 1);
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#endif
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rc = nghttp2_session_client_new2(&ctx->h2, cbs, cf, o);
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nghttp2_option_del(o);
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return rc;
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}
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static ssize_t nw_in_reader(void *reader_ctx,
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unsigned char *buf, size_t buflen,
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CURLcode *err)
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{
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struct Curl_cfilter *cf = reader_ctx;
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struct Curl_easy *data = CF_DATA_CURRENT(cf);
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return Curl_conn_cf_recv(cf->next, data, (char *)buf, buflen, err);
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}
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|
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static ssize_t nw_out_writer(void *writer_ctx,
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const unsigned char *buf, size_t buflen,
|
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CURLcode *err)
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{
|
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struct Curl_cfilter *cf = writer_ctx;
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struct Curl_easy *data = CF_DATA_CURRENT(cf);
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|
|
|
if(data) {
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ssize_t nwritten = Curl_conn_cf_send(cf->next, data,
|
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(const char *)buf, buflen, err);
|
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if(nwritten > 0)
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CURL_TRC_CF(data, cf, "[0] egress: wrote %zd bytes", nwritten);
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return nwritten;
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}
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return 0;
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}
|
|
|
|
static ssize_t send_callback(nghttp2_session *h2,
|
|
const uint8_t *mem, size_t length, int flags,
|
|
void *userp);
|
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static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
|
|
void *userp);
|
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#ifndef CURL_DISABLE_VERBOSE_STRINGS
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static int on_frame_send(nghttp2_session *session, const nghttp2_frame *frame,
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void *userp);
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|
#endif
|
|
static int on_data_chunk_recv(nghttp2_session *session, uint8_t flags,
|
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int32_t stream_id,
|
|
const uint8_t *mem, size_t len, void *userp);
|
|
static int on_stream_close(nghttp2_session *session, int32_t stream_id,
|
|
uint32_t error_code, void *userp);
|
|
static int on_begin_headers(nghttp2_session *session,
|
|
const nghttp2_frame *frame, void *userp);
|
|
static int on_header(nghttp2_session *session, const nghttp2_frame *frame,
|
|
const uint8_t *name, size_t namelen,
|
|
const uint8_t *value, size_t valuelen,
|
|
uint8_t flags,
|
|
void *userp);
|
|
static int error_callback(nghttp2_session *session, const char *msg,
|
|
size_t len, void *userp);
|
|
|
|
/*
|
|
* Initialize the cfilter context
|
|
*/
|
|
static CURLcode cf_h2_ctx_init(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
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bool via_h1_upgrade)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream;
|
|
CURLcode result = CURLE_OUT_OF_MEMORY;
|
|
int rc;
|
|
nghttp2_session_callbacks *cbs = NULL;
|
|
|
|
DEBUGASSERT(!ctx->h2);
|
|
Curl_bufcp_init(&ctx->stream_bufcp, H2_CHUNK_SIZE, H2_STREAM_POOL_SPARES);
|
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Curl_bufq_initp(&ctx->inbufq, &ctx->stream_bufcp, H2_NW_RECV_CHUNKS, 0);
|
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Curl_bufq_initp(&ctx->outbufq, &ctx->stream_bufcp, H2_NW_SEND_CHUNKS, 0);
|
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Curl_dyn_init(&ctx->scratch, CURL_MAX_HTTP_HEADER);
|
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Curl_hash_offt_init(&ctx->streams, 63, h2_stream_hash_free);
|
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ctx->remote_max_sid = 2147483647;
|
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|
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rc = nghttp2_session_callbacks_new(&cbs);
|
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if(rc) {
|
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failf(data, "Couldn't initialize nghttp2 callbacks");
|
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goto out;
|
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}
|
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|
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nghttp2_session_callbacks_set_send_callback(cbs, send_callback);
|
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nghttp2_session_callbacks_set_on_frame_recv_callback(cbs, on_frame_recv);
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#ifndef CURL_DISABLE_VERBOSE_STRINGS
|
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nghttp2_session_callbacks_set_on_frame_send_callback(cbs, on_frame_send);
|
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#endif
|
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nghttp2_session_callbacks_set_on_data_chunk_recv_callback(
|
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cbs, on_data_chunk_recv);
|
|
nghttp2_session_callbacks_set_on_stream_close_callback(cbs, on_stream_close);
|
|
nghttp2_session_callbacks_set_on_begin_headers_callback(
|
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cbs, on_begin_headers);
|
|
nghttp2_session_callbacks_set_on_header_callback(cbs, on_header);
|
|
nghttp2_session_callbacks_set_error_callback(cbs, error_callback);
|
|
|
|
/* The nghttp2 session is not yet setup, do it */
|
|
rc = h2_client_new(cf, cbs);
|
|
if(rc) {
|
|
failf(data, "Couldn't initialize nghttp2");
|
|
goto out;
|
|
}
|
|
ctx->max_concurrent_streams = DEFAULT_MAX_CONCURRENT_STREAMS;
|
|
|
|
if(via_h1_upgrade) {
|
|
/* HTTP/1.1 Upgrade issued. H2 Settings have already been submitted
|
|
* in the H1 request and we upgrade from there. This stream
|
|
* is opened implicitly as #1. */
|
|
uint8_t binsettings[H2_BINSETTINGS_LEN];
|
|
ssize_t binlen; /* length of the binsettings data */
|
|
|
|
binlen = populate_binsettings(binsettings, data);
|
|
if(binlen <= 0) {
|
|
failf(data, "nghttp2 unexpectedly failed on pack_settings_payload");
|
|
result = CURLE_FAILED_INIT;
|
|
goto out;
|
|
}
|
|
|
|
result = http2_data_setup(cf, data, &stream);
|
|
if(result)
|
|
goto out;
|
|
DEBUGASSERT(stream);
|
|
stream->id = 1;
|
|
/* queue SETTINGS frame (again) */
|
|
rc = nghttp2_session_upgrade2(ctx->h2, binsettings, (size_t)binlen,
|
|
data->state.httpreq == HTTPREQ_HEAD,
|
|
NULL);
|
|
if(rc) {
|
|
failf(data, "nghttp2_session_upgrade2() failed: %s(%d)",
|
|
nghttp2_strerror(rc), rc);
|
|
result = CURLE_HTTP2;
|
|
goto out;
|
|
}
|
|
|
|
rc = nghttp2_session_set_stream_user_data(ctx->h2, stream->id,
|
|
data);
|
|
if(rc) {
|
|
infof(data, "http/2: failed to set user_data for stream %u",
|
|
stream->id);
|
|
DEBUGASSERT(0);
|
|
}
|
|
CURL_TRC_CF(data, cf, "created session via Upgrade");
|
|
}
|
|
else {
|
|
nghttp2_settings_entry iv[H2_SETTINGS_IV_LEN];
|
|
size_t ivlen;
|
|
|
|
ivlen = populate_settings(iv, data);
|
|
rc = nghttp2_submit_settings(ctx->h2, NGHTTP2_FLAG_NONE,
|
|
iv, ivlen);
|
|
if(rc) {
|
|
failf(data, "nghttp2_submit_settings() failed: %s(%d)",
|
|
nghttp2_strerror(rc), rc);
|
|
result = CURLE_HTTP2;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
rc = nghttp2_session_set_local_window_size(ctx->h2, NGHTTP2_FLAG_NONE, 0,
|
|
HTTP2_HUGE_WINDOW_SIZE);
|
|
if(rc) {
|
|
failf(data, "nghttp2_session_set_local_window_size() failed: %s(%d)",
|
|
nghttp2_strerror(rc), rc);
|
|
result = CURLE_HTTP2;
|
|
goto out;
|
|
}
|
|
|
|
/* all set, traffic will be send on connect */
|
|
result = CURLE_OK;
|
|
CURL_TRC_CF(data, cf, "[0] created h2 session%s",
|
|
via_h1_upgrade? " (via h1 upgrade)" : "");
|
|
|
|
out:
|
|
if(cbs)
|
|
nghttp2_session_callbacks_del(cbs);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Returns nonzero if current HTTP/2 session should be closed.
|
|
*/
|
|
static int should_close_session(struct cf_h2_ctx *ctx)
|
|
{
|
|
return ctx->drain_total == 0 && !nghttp2_session_want_read(ctx->h2) &&
|
|
!nghttp2_session_want_write(ctx->h2);
|
|
}
|
|
|
|
/*
|
|
* Processes pending input left in network input buffer.
|
|
* This function returns 0 if it succeeds, or -1 and error code will
|
|
* be assigned to *err.
|
|
*/
|
|
static int h2_process_pending_input(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
CURLcode *err)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
const unsigned char *buf;
|
|
size_t blen;
|
|
ssize_t rv;
|
|
|
|
while(Curl_bufq_peek(&ctx->inbufq, &buf, &blen)) {
|
|
|
|
rv = nghttp2_session_mem_recv(ctx->h2, (const uint8_t *)buf, blen);
|
|
if(rv < 0) {
|
|
failf(data,
|
|
"process_pending_input: nghttp2_session_mem_recv() returned "
|
|
"%zd:%s", rv, nghttp2_strerror((int)rv));
|
|
*err = CURLE_RECV_ERROR;
|
|
return -1;
|
|
}
|
|
Curl_bufq_skip(&ctx->inbufq, (size_t)rv);
|
|
if(Curl_bufq_is_empty(&ctx->inbufq)) {
|
|
break;
|
|
}
|
|
else {
|
|
CURL_TRC_CF(data, cf, "process_pending_input: %zu bytes left "
|
|
"in connection buffer", Curl_bufq_len(&ctx->inbufq));
|
|
}
|
|
}
|
|
|
|
if(nghttp2_session_check_request_allowed(ctx->h2) == 0) {
|
|
/* No more requests are allowed in the current session, so
|
|
the connection may not be reused. This is set when a
|
|
GOAWAY frame has been received or when the limit of stream
|
|
identifiers has been reached. */
|
|
connclose(cf->conn, "http/2: No new requests allowed");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The server may send us data at any point (e.g. PING frames). Therefore,
|
|
* we cannot assume that an HTTP/2 socket is dead just because it is readable.
|
|
*
|
|
* Check the lower filters first and, if successful, peek at the socket
|
|
* and distinguish between closed and data.
|
|
*/
|
|
static bool http2_connisalive(struct Curl_cfilter *cf, struct Curl_easy *data,
|
|
bool *input_pending)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
bool alive = TRUE;
|
|
|
|
*input_pending = FALSE;
|
|
if(!cf->next || !cf->next->cft->is_alive(cf->next, data, input_pending))
|
|
return FALSE;
|
|
|
|
if(*input_pending) {
|
|
/* This happens before we've sent off a request and the connection is
|
|
not in use by any other transfer, there shouldn't be any data here,
|
|
only "protocol frames" */
|
|
CURLcode result;
|
|
ssize_t nread = -1;
|
|
|
|
*input_pending = FALSE;
|
|
nread = Curl_bufq_slurp(&ctx->inbufq, nw_in_reader, cf, &result);
|
|
if(nread != -1) {
|
|
CURL_TRC_CF(data, cf, "%zd bytes stray data read before trying "
|
|
"h2 connection", nread);
|
|
if(h2_process_pending_input(cf, data, &result) < 0)
|
|
/* immediate error, considered dead */
|
|
alive = FALSE;
|
|
else {
|
|
alive = !should_close_session(ctx);
|
|
}
|
|
}
|
|
else if(result != CURLE_AGAIN) {
|
|
/* the read failed so let's say this is dead anyway */
|
|
alive = FALSE;
|
|
}
|
|
}
|
|
|
|
return alive;
|
|
}
|
|
|
|
static CURLcode http2_send_ping(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
int rc;
|
|
|
|
rc = nghttp2_submit_ping(ctx->h2, 0, ZERO_NULL);
|
|
if(rc) {
|
|
failf(data, "nghttp2_submit_ping() failed: %s(%d)",
|
|
nghttp2_strerror(rc), rc);
|
|
return CURLE_HTTP2;
|
|
}
|
|
|
|
rc = nghttp2_session_send(ctx->h2);
|
|
if(rc) {
|
|
failf(data, "nghttp2_session_send() failed: %s(%d)",
|
|
nghttp2_strerror(rc), rc);
|
|
return CURLE_SEND_ERROR;
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* Store nghttp2 version info in this buffer.
|
|
*/
|
|
void Curl_http2_ver(char *p, size_t len)
|
|
{
|
|
nghttp2_info *h2 = nghttp2_version(0);
|
|
(void)msnprintf(p, len, "nghttp2/%s", h2->version_str);
|
|
}
|
|
|
|
static CURLcode nw_out_flush(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
ssize_t nwritten;
|
|
CURLcode result;
|
|
|
|
(void)data;
|
|
if(Curl_bufq_is_empty(&ctx->outbufq))
|
|
return CURLE_OK;
|
|
|
|
nwritten = Curl_bufq_pass(&ctx->outbufq, nw_out_writer, cf, &result);
|
|
if(nwritten < 0) {
|
|
if(result == CURLE_AGAIN) {
|
|
CURL_TRC_CF(data, cf, "flush nw send buffer(%zu) -> EAGAIN",
|
|
Curl_bufq_len(&ctx->outbufq));
|
|
ctx->nw_out_blocked = 1;
|
|
}
|
|
return result;
|
|
}
|
|
return Curl_bufq_is_empty(&ctx->outbufq)? CURLE_OK: CURLE_AGAIN;
|
|
}
|
|
|
|
/*
|
|
* The implementation of nghttp2_send_callback type. Here we write |data| with
|
|
* size |length| to the network and return the number of bytes actually
|
|
* written. See the documentation of nghttp2_send_callback for the details.
|
|
*/
|
|
static ssize_t send_callback(nghttp2_session *h2,
|
|
const uint8_t *buf, size_t blen, int flags,
|
|
void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct Curl_easy *data = CF_DATA_CURRENT(cf);
|
|
ssize_t nwritten;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
(void)h2;
|
|
(void)flags;
|
|
DEBUGASSERT(data);
|
|
|
|
nwritten = Curl_bufq_write_pass(&ctx->outbufq, buf, blen,
|
|
nw_out_writer, cf, &result);
|
|
if(nwritten < 0) {
|
|
if(result == CURLE_AGAIN) {
|
|
ctx->nw_out_blocked = 1;
|
|
return NGHTTP2_ERR_WOULDBLOCK;
|
|
}
|
|
failf(data, "Failed sending HTTP2 data");
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
if(!nwritten) {
|
|
ctx->nw_out_blocked = 1;
|
|
return NGHTTP2_ERR_WOULDBLOCK;
|
|
}
|
|
return nwritten;
|
|
}
|
|
|
|
|
|
/* We pass a pointer to this struct in the push callback, but the contents of
|
|
the struct are hidden from the user. */
|
|
struct curl_pushheaders {
|
|
struct Curl_easy *data;
|
|
struct h2_stream_ctx *stream;
|
|
const nghttp2_push_promise *frame;
|
|
};
|
|
|
|
/*
|
|
* push header access function. Only to be used from within the push callback
|
|
*/
|
|
char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num)
|
|
{
|
|
/* Verify that we got a good easy handle in the push header struct, mostly to
|
|
detect rubbish input fast(er). */
|
|
if(!h || !GOOD_EASY_HANDLE(h->data))
|
|
return NULL;
|
|
else {
|
|
if(h->stream && num < h->stream->push_headers_used)
|
|
return h->stream->push_headers[num];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* push header access function. Only to be used from within the push callback
|
|
*/
|
|
char *curl_pushheader_byname(struct curl_pushheaders *h, const char *header)
|
|
{
|
|
struct h2_stream_ctx *stream;
|
|
size_t len;
|
|
size_t i;
|
|
/* Verify that we got a good easy handle in the push header struct,
|
|
mostly to detect rubbish input fast(er). Also empty header name
|
|
is just a rubbish too. We have to allow ":" at the beginning of
|
|
the header, but header == ":" must be rejected. If we have ':' in
|
|
the middle of header, it could be matched in middle of the value,
|
|
this is because we do prefix match.*/
|
|
if(!h || !GOOD_EASY_HANDLE(h->data) || !header || !header[0] ||
|
|
!strcmp(header, ":") || strchr(header + 1, ':'))
|
|
return NULL;
|
|
|
|
stream = h->stream;
|
|
if(!stream)
|
|
return NULL;
|
|
|
|
len = strlen(header);
|
|
for(i = 0; i<stream->push_headers_used; i++) {
|
|
if(!strncmp(header, stream->push_headers[i], len)) {
|
|
/* sub-match, make sure that it is followed by a colon */
|
|
if(stream->push_headers[i][len] != ':')
|
|
continue;
|
|
return &stream->push_headers[i][len + 1];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct Curl_easy *h2_duphandle(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data)
|
|
{
|
|
struct Curl_easy *second = curl_easy_duphandle(data);
|
|
if(second) {
|
|
struct h2_stream_ctx *second_stream;
|
|
http2_data_setup(cf, second, &second_stream);
|
|
second->state.priority.weight = data->state.priority.weight;
|
|
}
|
|
return second;
|
|
}
|
|
|
|
static int set_transfer_url(struct Curl_easy *data,
|
|
struct curl_pushheaders *hp)
|
|
{
|
|
const char *v;
|
|
CURLUcode uc;
|
|
char *url = NULL;
|
|
int rc = 0;
|
|
CURLU *u = curl_url();
|
|
|
|
if(!u)
|
|
return 5;
|
|
|
|
v = curl_pushheader_byname(hp, HTTP_PSEUDO_SCHEME);
|
|
if(v) {
|
|
uc = curl_url_set(u, CURLUPART_SCHEME, v, 0);
|
|
if(uc) {
|
|
rc = 1;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
v = curl_pushheader_byname(hp, HTTP_PSEUDO_AUTHORITY);
|
|
if(v) {
|
|
uc = Curl_url_set_authority(u, v);
|
|
if(uc) {
|
|
rc = 2;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
v = curl_pushheader_byname(hp, HTTP_PSEUDO_PATH);
|
|
if(v) {
|
|
uc = curl_url_set(u, CURLUPART_PATH, v, 0);
|
|
if(uc) {
|
|
rc = 3;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
uc = curl_url_get(u, CURLUPART_URL, &url, 0);
|
|
if(uc)
|
|
rc = 4;
|
|
fail:
|
|
curl_url_cleanup(u);
|
|
if(rc)
|
|
return rc;
|
|
|
|
if(data->state.url_alloc)
|
|
free(data->state.url);
|
|
data->state.url_alloc = TRUE;
|
|
data->state.url = url;
|
|
return 0;
|
|
}
|
|
|
|
static void discard_newhandle(struct Curl_cfilter *cf,
|
|
struct Curl_easy *newhandle)
|
|
{
|
|
http2_data_done(cf, newhandle);
|
|
(void)Curl_close(&newhandle);
|
|
}
|
|
|
|
static int push_promise(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
const nghttp2_push_promise *frame)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
int rv; /* one of the CURL_PUSH_* defines */
|
|
|
|
CURL_TRC_CF(data, cf, "[%d] PUSH_PROMISE received",
|
|
frame->promised_stream_id);
|
|
if(data->multi->push_cb) {
|
|
struct h2_stream_ctx *stream;
|
|
struct h2_stream_ctx *newstream;
|
|
struct curl_pushheaders heads;
|
|
CURLMcode rc;
|
|
CURLcode result;
|
|
/* clone the parent */
|
|
struct Curl_easy *newhandle = h2_duphandle(cf, data);
|
|
if(!newhandle) {
|
|
infof(data, "failed to duplicate handle");
|
|
rv = CURL_PUSH_DENY; /* FAIL HARD */
|
|
goto fail;
|
|
}
|
|
|
|
/* ask the application */
|
|
CURL_TRC_CF(data, cf, "Got PUSH_PROMISE, ask application");
|
|
|
|
stream = H2_STREAM_CTX(ctx, data);
|
|
if(!stream) {
|
|
failf(data, "Internal NULL stream");
|
|
discard_newhandle(cf, newhandle);
|
|
rv = CURL_PUSH_DENY;
|
|
goto fail;
|
|
}
|
|
|
|
heads.data = data;
|
|
heads.stream = stream;
|
|
heads.frame = frame;
|
|
|
|
rv = set_transfer_url(newhandle, &heads);
|
|
if(rv) {
|
|
discard_newhandle(cf, newhandle);
|
|
rv = CURL_PUSH_DENY;
|
|
goto fail;
|
|
}
|
|
|
|
result = http2_data_setup(cf, newhandle, &newstream);
|
|
if(result) {
|
|
failf(data, "error setting up stream: %d", result);
|
|
discard_newhandle(cf, newhandle);
|
|
rv = CURL_PUSH_DENY;
|
|
goto fail;
|
|
}
|
|
DEBUGASSERT(stream);
|
|
|
|
Curl_set_in_callback(data, true);
|
|
rv = data->multi->push_cb(data, newhandle,
|
|
stream->push_headers_used, &heads,
|
|
data->multi->push_userp);
|
|
Curl_set_in_callback(data, false);
|
|
|
|
/* free the headers again */
|
|
free_push_headers(stream);
|
|
|
|
if(rv) {
|
|
DEBUGASSERT((rv > CURL_PUSH_OK) && (rv <= CURL_PUSH_ERROROUT));
|
|
/* denied, kill off the new handle again */
|
|
discard_newhandle(cf, newhandle);
|
|
goto fail;
|
|
}
|
|
|
|
newstream->id = frame->promised_stream_id;
|
|
newhandle->req.maxdownload = -1;
|
|
newhandle->req.size = -1;
|
|
|
|
/* approved, add to the multi handle and immediately switch to PERFORM
|
|
state with the given connection !*/
|
|
rc = Curl_multi_add_perform(data->multi, newhandle, cf->conn);
|
|
if(rc) {
|
|
infof(data, "failed to add handle to multi");
|
|
discard_newhandle(cf, newhandle);
|
|
rv = CURL_PUSH_DENY;
|
|
goto fail;
|
|
}
|
|
|
|
rv = nghttp2_session_set_stream_user_data(ctx->h2,
|
|
newstream->id,
|
|
newhandle);
|
|
if(rv) {
|
|
infof(data, "failed to set user_data for stream %u",
|
|
newstream->id);
|
|
DEBUGASSERT(0);
|
|
rv = CURL_PUSH_DENY;
|
|
goto fail;
|
|
}
|
|
|
|
/* success, remember max stream id processed */
|
|
if(newstream->id > ctx->local_max_sid)
|
|
ctx->local_max_sid = newstream->id;
|
|
}
|
|
else {
|
|
CURL_TRC_CF(data, cf, "Got PUSH_PROMISE, ignore it");
|
|
rv = CURL_PUSH_DENY;
|
|
}
|
|
fail:
|
|
return rv;
|
|
}
|
|
|
|
static void h2_xfer_write_resp_hd(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
struct h2_stream_ctx *stream,
|
|
const char *buf, size_t blen, bool eos)
|
|
{
|
|
|
|
/* If we already encountered an error, skip further writes */
|
|
if(!stream->xfer_result) {
|
|
stream->xfer_result = Curl_xfer_write_resp_hd(data, buf, blen, eos);
|
|
if(stream->xfer_result)
|
|
CURL_TRC_CF(data, cf, "[%d] error %d writing %zu bytes of headers",
|
|
stream->id, stream->xfer_result, blen);
|
|
}
|
|
}
|
|
|
|
static void h2_xfer_write_resp(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
struct h2_stream_ctx *stream,
|
|
const char *buf, size_t blen, bool eos)
|
|
{
|
|
|
|
/* If we already encountered an error, skip further writes */
|
|
if(!stream->xfer_result)
|
|
stream->xfer_result = Curl_xfer_write_resp(data, buf, blen, eos);
|
|
/* If the transfer write is errored, we do not want any more data */
|
|
if(stream->xfer_result) {
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
CURL_TRC_CF(data, cf, "[%d] error %d writing %zu bytes of data, "
|
|
"RST-ing stream",
|
|
stream->id, stream->xfer_result, blen);
|
|
nghttp2_submit_rst_stream(ctx->h2, 0, stream->id,
|
|
(uint32_t)NGHTTP2_ERR_CALLBACK_FAILURE);
|
|
}
|
|
}
|
|
|
|
static CURLcode on_stream_frame(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
const nghttp2_frame *frame)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
int32_t stream_id = frame->hd.stream_id;
|
|
int rv;
|
|
|
|
if(!stream) {
|
|
CURL_TRC_CF(data, cf, "[%d] No stream_ctx set", stream_id);
|
|
return CURLE_FAILED_INIT;
|
|
}
|
|
|
|
switch(frame->hd.type) {
|
|
case NGHTTP2_DATA:
|
|
CURL_TRC_CF(data, cf, "[%d] DATA, window=%d/%d",
|
|
stream_id,
|
|
nghttp2_session_get_stream_effective_recv_data_length(
|
|
ctx->h2, stream->id),
|
|
nghttp2_session_get_stream_effective_local_window_size(
|
|
ctx->h2, stream->id));
|
|
/* If !body started on this stream, then receiving DATA is illegal. */
|
|
if(!stream->bodystarted) {
|
|
rv = nghttp2_submit_rst_stream(ctx->h2, NGHTTP2_FLAG_NONE,
|
|
stream_id, NGHTTP2_PROTOCOL_ERROR);
|
|
|
|
if(nghttp2_is_fatal(rv)) {
|
|
return CURLE_RECV_ERROR;
|
|
}
|
|
}
|
|
if(frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
|
|
drain_stream(cf, data, stream);
|
|
}
|
|
break;
|
|
case NGHTTP2_HEADERS:
|
|
if(stream->bodystarted) {
|
|
/* Only valid HEADERS after body started is trailer HEADERS. We
|
|
buffer them in on_header callback. */
|
|
break;
|
|
}
|
|
|
|
/* nghttp2 guarantees that :status is received, and we store it to
|
|
stream->status_code. Fuzzing has proven this can still be reached
|
|
without status code having been set. */
|
|
if(stream->status_code == -1)
|
|
return CURLE_RECV_ERROR;
|
|
|
|
/* Only final status code signals the end of header */
|
|
if(stream->status_code / 100 != 1) {
|
|
stream->bodystarted = TRUE;
|
|
stream->status_code = -1;
|
|
}
|
|
|
|
h2_xfer_write_resp_hd(cf, data, stream, STRCONST("\r\n"), stream->closed);
|
|
|
|
if(stream->status_code / 100 != 1) {
|
|
stream->resp_hds_complete = TRUE;
|
|
}
|
|
drain_stream(cf, data, stream);
|
|
break;
|
|
case NGHTTP2_PUSH_PROMISE:
|
|
rv = push_promise(cf, data, &frame->push_promise);
|
|
if(rv) { /* deny! */
|
|
DEBUGASSERT((rv > CURL_PUSH_OK) && (rv <= CURL_PUSH_ERROROUT));
|
|
rv = nghttp2_submit_rst_stream(ctx->h2, NGHTTP2_FLAG_NONE,
|
|
frame->push_promise.promised_stream_id,
|
|
NGHTTP2_CANCEL);
|
|
if(nghttp2_is_fatal(rv))
|
|
return CURLE_SEND_ERROR;
|
|
else if(rv == CURL_PUSH_ERROROUT) {
|
|
CURL_TRC_CF(data, cf, "[%d] fail in PUSH_PROMISE received",
|
|
stream_id);
|
|
return CURLE_RECV_ERROR;
|
|
}
|
|
}
|
|
break;
|
|
case NGHTTP2_RST_STREAM:
|
|
stream->closed = TRUE;
|
|
if(frame->rst_stream.error_code) {
|
|
stream->reset = TRUE;
|
|
}
|
|
stream->send_closed = TRUE;
|
|
drain_stream(cf, data, stream);
|
|
break;
|
|
case NGHTTP2_WINDOW_UPDATE:
|
|
if(CURL_WANT_SEND(data)) {
|
|
drain_stream(cf, data, stream);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
#ifndef CURL_DISABLE_VERBOSE_STRINGS
|
|
static int fr_print(const nghttp2_frame *frame, char *buffer, size_t blen)
|
|
{
|
|
switch(frame->hd.type) {
|
|
case NGHTTP2_DATA: {
|
|
return msnprintf(buffer, blen,
|
|
"FRAME[DATA, len=%d, eos=%d, padlen=%d]",
|
|
(int)frame->hd.length,
|
|
!!(frame->hd.flags & NGHTTP2_FLAG_END_STREAM),
|
|
(int)frame->data.padlen);
|
|
}
|
|
case NGHTTP2_HEADERS: {
|
|
return msnprintf(buffer, blen,
|
|
"FRAME[HEADERS, len=%d, hend=%d, eos=%d]",
|
|
(int)frame->hd.length,
|
|
!!(frame->hd.flags & NGHTTP2_FLAG_END_HEADERS),
|
|
!!(frame->hd.flags & NGHTTP2_FLAG_END_STREAM));
|
|
}
|
|
case NGHTTP2_PRIORITY: {
|
|
return msnprintf(buffer, blen,
|
|
"FRAME[PRIORITY, len=%d, flags=%d]",
|
|
(int)frame->hd.length, frame->hd.flags);
|
|
}
|
|
case NGHTTP2_RST_STREAM: {
|
|
return msnprintf(buffer, blen,
|
|
"FRAME[RST_STREAM, len=%d, flags=%d, error=%u]",
|
|
(int)frame->hd.length, frame->hd.flags,
|
|
frame->rst_stream.error_code);
|
|
}
|
|
case NGHTTP2_SETTINGS: {
|
|
if(frame->hd.flags & NGHTTP2_FLAG_ACK) {
|
|
return msnprintf(buffer, blen, "FRAME[SETTINGS, ack=1]");
|
|
}
|
|
return msnprintf(buffer, blen,
|
|
"FRAME[SETTINGS, len=%d]", (int)frame->hd.length);
|
|
}
|
|
case NGHTTP2_PUSH_PROMISE: {
|
|
return msnprintf(buffer, blen,
|
|
"FRAME[PUSH_PROMISE, len=%d, hend=%d]",
|
|
(int)frame->hd.length,
|
|
!!(frame->hd.flags & NGHTTP2_FLAG_END_HEADERS));
|
|
}
|
|
case NGHTTP2_PING: {
|
|
return msnprintf(buffer, blen,
|
|
"FRAME[PING, len=%d, ack=%d]",
|
|
(int)frame->hd.length,
|
|
frame->hd.flags&NGHTTP2_FLAG_ACK);
|
|
}
|
|
case NGHTTP2_GOAWAY: {
|
|
char scratch[128];
|
|
size_t s_len = sizeof(scratch)/sizeof(scratch[0]);
|
|
size_t len = (frame->goaway.opaque_data_len < s_len)?
|
|
frame->goaway.opaque_data_len : s_len-1;
|
|
if(len)
|
|
memcpy(scratch, frame->goaway.opaque_data, len);
|
|
scratch[len] = '\0';
|
|
return msnprintf(buffer, blen, "FRAME[GOAWAY, error=%d, reason='%s', "
|
|
"last_stream=%d]", frame->goaway.error_code,
|
|
scratch, frame->goaway.last_stream_id);
|
|
}
|
|
case NGHTTP2_WINDOW_UPDATE: {
|
|
return msnprintf(buffer, blen,
|
|
"FRAME[WINDOW_UPDATE, incr=%d]",
|
|
frame->window_update.window_size_increment);
|
|
}
|
|
default:
|
|
return msnprintf(buffer, blen, "FRAME[%d, len=%d, flags=%d]",
|
|
frame->hd.type, (int)frame->hd.length,
|
|
frame->hd.flags);
|
|
}
|
|
}
|
|
|
|
static int on_frame_send(nghttp2_session *session, const nghttp2_frame *frame,
|
|
void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct Curl_easy *data = CF_DATA_CURRENT(cf);
|
|
|
|
(void)session;
|
|
DEBUGASSERT(data);
|
|
if(data && Curl_trc_cf_is_verbose(cf, data)) {
|
|
char buffer[256];
|
|
int len;
|
|
len = fr_print(frame, buffer, sizeof(buffer)-1);
|
|
buffer[len] = 0;
|
|
CURL_TRC_CF(data, cf, "[%d] -> %s", frame->hd.stream_id, buffer);
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* !CURL_DISABLE_VERBOSE_STRINGS */
|
|
|
|
static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
|
|
void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct Curl_easy *data = CF_DATA_CURRENT(cf), *data_s;
|
|
int32_t stream_id = frame->hd.stream_id;
|
|
|
|
DEBUGASSERT(data);
|
|
#ifndef CURL_DISABLE_VERBOSE_STRINGS
|
|
if(Curl_trc_cf_is_verbose(cf, data)) {
|
|
char buffer[256];
|
|
int len;
|
|
len = fr_print(frame, buffer, sizeof(buffer)-1);
|
|
buffer[len] = 0;
|
|
CURL_TRC_CF(data, cf, "[%d] <- %s",frame->hd.stream_id, buffer);
|
|
}
|
|
#endif /* !CURL_DISABLE_VERBOSE_STRINGS */
|
|
|
|
if(!stream_id) {
|
|
/* stream ID zero is for connection-oriented stuff */
|
|
DEBUGASSERT(data);
|
|
switch(frame->hd.type) {
|
|
case NGHTTP2_SETTINGS: {
|
|
if(!(frame->hd.flags & NGHTTP2_FLAG_ACK)) {
|
|
uint32_t max_conn = ctx->max_concurrent_streams;
|
|
ctx->max_concurrent_streams = nghttp2_session_get_remote_settings(
|
|
session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS);
|
|
ctx->enable_push = nghttp2_session_get_remote_settings(
|
|
session, NGHTTP2_SETTINGS_ENABLE_PUSH) != 0;
|
|
CURL_TRC_CF(data, cf, "[0] MAX_CONCURRENT_STREAMS: %d",
|
|
ctx->max_concurrent_streams);
|
|
CURL_TRC_CF(data, cf, "[0] ENABLE_PUSH: %s",
|
|
ctx->enable_push ? "TRUE" : "false");
|
|
if(data && max_conn != ctx->max_concurrent_streams) {
|
|
/* only signal change if the value actually changed */
|
|
CURL_TRC_CF(data, cf, "[0] notify MAX_CONCURRENT_STREAMS: %u",
|
|
ctx->max_concurrent_streams);
|
|
Curl_multi_connchanged(data->multi);
|
|
}
|
|
/* Since the initial stream window is 64K, a request might be on HOLD,
|
|
* due to exhaustion. The (initial) SETTINGS may announce a much larger
|
|
* window and *assume* that we treat this like a WINDOW_UPDATE. Some
|
|
* servers send an explicit WINDOW_UPDATE, but not all seem to do that.
|
|
* To be safe, we UNHOLD a stream in order not to stall. */
|
|
if(CURL_WANT_SEND(data)) {
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
if(stream)
|
|
drain_stream(cf, data, stream);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case NGHTTP2_GOAWAY:
|
|
ctx->rcvd_goaway = TRUE;
|
|
ctx->goaway_error = frame->goaway.error_code;
|
|
ctx->remote_max_sid = frame->goaway.last_stream_id;
|
|
if(data) {
|
|
infof(data, "received GOAWAY, error=%u, last_stream=%u",
|
|
ctx->goaway_error, ctx->remote_max_sid);
|
|
Curl_multi_connchanged(data->multi);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
|
if(!data_s) {
|
|
CURL_TRC_CF(data, cf, "[%d] No Curl_easy associated", stream_id);
|
|
return 0;
|
|
}
|
|
|
|
return on_stream_frame(cf, data_s, frame)? NGHTTP2_ERR_CALLBACK_FAILURE : 0;
|
|
}
|
|
|
|
static int on_data_chunk_recv(nghttp2_session *session, uint8_t flags,
|
|
int32_t stream_id,
|
|
const uint8_t *mem, size_t len, void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream;
|
|
struct Curl_easy *data_s;
|
|
(void)flags;
|
|
|
|
DEBUGASSERT(stream_id); /* should never be a zero stream ID here */
|
|
DEBUGASSERT(CF_DATA_CURRENT(cf));
|
|
|
|
/* get the stream from the hash based on Stream ID */
|
|
data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
|
if(!data_s) {
|
|
/* Receiving a Stream ID not in the hash should not happen - unless
|
|
we have aborted a transfer artificially and there were more data
|
|
in the pipeline. Silently ignore. */
|
|
CURL_TRC_CF(CF_DATA_CURRENT(cf), cf, "[%d] Data for unknown",
|
|
stream_id);
|
|
/* consumed explicitly as no one will read it */
|
|
nghttp2_session_consume(session, stream_id, len);
|
|
return 0;
|
|
}
|
|
|
|
stream = H2_STREAM_CTX(ctx, data_s);
|
|
if(!stream)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
|
|
h2_xfer_write_resp(cf, data_s, stream, (char *)mem, len, FALSE);
|
|
|
|
nghttp2_session_consume(ctx->h2, stream_id, len);
|
|
stream->nrcvd_data += (curl_off_t)len;
|
|
|
|
/* if we receive data for another handle, wake that up */
|
|
drain_stream(cf, data_s, stream);
|
|
return 0;
|
|
}
|
|
|
|
static int on_stream_close(nghttp2_session *session, int32_t stream_id,
|
|
uint32_t error_code, void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct Curl_easy *data_s, *call_data = CF_DATA_CURRENT(cf);
|
|
struct h2_stream_ctx *stream;
|
|
int rv;
|
|
(void)session;
|
|
|
|
DEBUGASSERT(call_data);
|
|
/* get the stream from the hash based on Stream ID, stream ID zero is for
|
|
connection-oriented stuff */
|
|
data_s = stream_id?
|
|
nghttp2_session_get_stream_user_data(session, stream_id) : NULL;
|
|
if(!data_s) {
|
|
CURL_TRC_CF(call_data, cf,
|
|
"[%d] on_stream_close, no easy set on stream", stream_id);
|
|
return 0;
|
|
}
|
|
if(!GOOD_EASY_HANDLE(data_s)) {
|
|
/* nghttp2 still has an easy registered for the stream which has
|
|
* been freed be libcurl. This points to a code path that does not
|
|
* trigger DONE or DETACH events as it must. */
|
|
CURL_TRC_CF(call_data, cf,
|
|
"[%d] on_stream_close, not a GOOD easy on stream", stream_id);
|
|
(void)nghttp2_session_set_stream_user_data(session, stream_id, 0);
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
stream = H2_STREAM_CTX(ctx, data_s);
|
|
if(!stream) {
|
|
CURL_TRC_CF(data_s, cf,
|
|
"[%d] on_stream_close, GOOD easy but no stream", stream_id);
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
stream->closed = TRUE;
|
|
stream->error = error_code;
|
|
if(stream->error) {
|
|
stream->reset = TRUE;
|
|
stream->send_closed = TRUE;
|
|
}
|
|
|
|
if(stream->error)
|
|
CURL_TRC_CF(data_s, cf, "[%d] RESET: %s (err %d)",
|
|
stream_id, nghttp2_http2_strerror(error_code), error_code);
|
|
else
|
|
CURL_TRC_CF(data_s, cf, "[%d] CLOSED", stream_id);
|
|
drain_stream(cf, data_s, stream);
|
|
|
|
/* remove `data_s` from the nghttp2 stream */
|
|
rv = nghttp2_session_set_stream_user_data(session, stream_id, 0);
|
|
if(rv) {
|
|
infof(data_s, "http/2: failed to clear user_data for stream %u",
|
|
stream_id);
|
|
DEBUGASSERT(0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int on_begin_headers(nghttp2_session *session,
|
|
const nghttp2_frame *frame, void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream;
|
|
struct Curl_easy *data_s = NULL;
|
|
|
|
(void)cf;
|
|
data_s = nghttp2_session_get_stream_user_data(session, frame->hd.stream_id);
|
|
if(!data_s) {
|
|
return 0;
|
|
}
|
|
|
|
if(frame->hd.type != NGHTTP2_HEADERS) {
|
|
return 0;
|
|
}
|
|
|
|
stream = H2_STREAM_CTX(ctx, data_s);
|
|
if(!stream || !stream->bodystarted) {
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* frame->hd.type is either NGHTTP2_HEADERS or NGHTTP2_PUSH_PROMISE */
|
|
static int on_header(nghttp2_session *session, const nghttp2_frame *frame,
|
|
const uint8_t *name, size_t namelen,
|
|
const uint8_t *value, size_t valuelen,
|
|
uint8_t flags,
|
|
void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream;
|
|
struct Curl_easy *data_s;
|
|
int32_t stream_id = frame->hd.stream_id;
|
|
CURLcode result;
|
|
(void)flags;
|
|
|
|
DEBUGASSERT(stream_id); /* should never be a zero stream ID here */
|
|
|
|
/* get the stream from the hash based on Stream ID */
|
|
data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
|
if(!data_s)
|
|
/* Receiving a Stream ID not in the hash should not happen, this is an
|
|
internal error more than anything else! */
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
|
|
stream = H2_STREAM_CTX(ctx, data_s);
|
|
if(!stream) {
|
|
failf(data_s, "Internal NULL stream");
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
|
|
/* Store received PUSH_PROMISE headers to be used when the subsequent
|
|
PUSH_PROMISE callback comes */
|
|
if(frame->hd.type == NGHTTP2_PUSH_PROMISE) {
|
|
char *h;
|
|
|
|
if(!strcmp(HTTP_PSEUDO_AUTHORITY, (const char *)name)) {
|
|
/* pseudo headers are lower case */
|
|
int rc = 0;
|
|
char *check = aprintf("%s:%d", cf->conn->host.name,
|
|
cf->conn->remote_port);
|
|
if(!check)
|
|
/* no memory */
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
if(!strcasecompare(check, (const char *)value) &&
|
|
((cf->conn->remote_port != cf->conn->given->defport) ||
|
|
!strcasecompare(cf->conn->host.name, (const char *)value))) {
|
|
/* This is push is not for the same authority that was asked for in
|
|
* the URL. RFC 7540 section 8.2 says: "A client MUST treat a
|
|
* PUSH_PROMISE for which the server is not authoritative as a stream
|
|
* error of type PROTOCOL_ERROR."
|
|
*/
|
|
(void)nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
|
|
stream_id, NGHTTP2_PROTOCOL_ERROR);
|
|
rc = NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
free(check);
|
|
if(rc)
|
|
return rc;
|
|
}
|
|
|
|
if(!stream->push_headers) {
|
|
stream->push_headers_alloc = 10;
|
|
stream->push_headers = malloc(stream->push_headers_alloc *
|
|
sizeof(char *));
|
|
if(!stream->push_headers)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
stream->push_headers_used = 0;
|
|
}
|
|
else if(stream->push_headers_used ==
|
|
stream->push_headers_alloc) {
|
|
char **headp;
|
|
if(stream->push_headers_alloc > 1000) {
|
|
/* this is beyond crazy many headers, bail out */
|
|
failf(data_s, "Too many PUSH_PROMISE headers");
|
|
free_push_headers(stream);
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
stream->push_headers_alloc *= 2;
|
|
headp = realloc(stream->push_headers,
|
|
stream->push_headers_alloc * sizeof(char *));
|
|
if(!headp) {
|
|
free_push_headers(stream);
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
stream->push_headers = headp;
|
|
}
|
|
h = aprintf("%s:%s", name, value);
|
|
if(h)
|
|
stream->push_headers[stream->push_headers_used++] = h;
|
|
return 0;
|
|
}
|
|
|
|
if(stream->bodystarted) {
|
|
/* This is a trailer */
|
|
CURL_TRC_CF(data_s, cf, "[%d] trailer: %.*s: %.*s",
|
|
stream->id, (int)namelen, name, (int)valuelen, value);
|
|
result = Curl_dynhds_add(&stream->resp_trailers,
|
|
(const char *)name, namelen,
|
|
(const char *)value, valuelen);
|
|
if(result)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if(namelen == sizeof(HTTP_PSEUDO_STATUS) - 1 &&
|
|
memcmp(HTTP_PSEUDO_STATUS, name, namelen) == 0) {
|
|
/* nghttp2 guarantees :status is received first and only once. */
|
|
char buffer[32];
|
|
result = Curl_http_decode_status(&stream->status_code,
|
|
(const char *)value, valuelen);
|
|
if(result)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
msnprintf(buffer, sizeof(buffer), HTTP_PSEUDO_STATUS ":%u\r",
|
|
stream->status_code);
|
|
result = Curl_headers_push(data_s, buffer, CURLH_PSEUDO);
|
|
if(result)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
Curl_dyn_reset(&ctx->scratch);
|
|
result = Curl_dyn_addn(&ctx->scratch, STRCONST("HTTP/2 "));
|
|
if(!result)
|
|
result = Curl_dyn_addn(&ctx->scratch, value, valuelen);
|
|
if(!result)
|
|
result = Curl_dyn_addn(&ctx->scratch, STRCONST(" \r\n"));
|
|
if(!result)
|
|
h2_xfer_write_resp_hd(cf, data_s, stream, Curl_dyn_ptr(&ctx->scratch),
|
|
Curl_dyn_len(&ctx->scratch), FALSE);
|
|
if(result)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
/* if we receive data for another handle, wake that up */
|
|
if(CF_DATA_CURRENT(cf) != data_s)
|
|
Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
|
|
|
|
CURL_TRC_CF(data_s, cf, "[%d] status: HTTP/2 %03d",
|
|
stream->id, stream->status_code);
|
|
return 0;
|
|
}
|
|
|
|
/* nghttp2 guarantees that namelen > 0, and :status was already
|
|
received, and this is not pseudo-header field . */
|
|
/* convert to an HTTP1-style header */
|
|
Curl_dyn_reset(&ctx->scratch);
|
|
result = Curl_dyn_addn(&ctx->scratch, (const char *)name, namelen);
|
|
if(!result)
|
|
result = Curl_dyn_addn(&ctx->scratch, STRCONST(": "));
|
|
if(!result)
|
|
result = Curl_dyn_addn(&ctx->scratch, (const char *)value, valuelen);
|
|
if(!result)
|
|
result = Curl_dyn_addn(&ctx->scratch, STRCONST("\r\n"));
|
|
if(!result)
|
|
h2_xfer_write_resp_hd(cf, data_s, stream, Curl_dyn_ptr(&ctx->scratch),
|
|
Curl_dyn_len(&ctx->scratch), FALSE);
|
|
if(result)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
/* if we receive data for another handle, wake that up */
|
|
if(CF_DATA_CURRENT(cf) != data_s)
|
|
Curl_expire(data_s, 0, EXPIRE_RUN_NOW);
|
|
|
|
CURL_TRC_CF(data_s, cf, "[%d] header: %.*s: %.*s",
|
|
stream->id, (int)namelen, name, (int)valuelen, value);
|
|
|
|
return 0; /* 0 is successful */
|
|
}
|
|
|
|
static ssize_t req_body_read_callback(nghttp2_session *session,
|
|
int32_t stream_id,
|
|
uint8_t *buf, size_t length,
|
|
uint32_t *data_flags,
|
|
nghttp2_data_source *source,
|
|
void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct Curl_easy *data_s;
|
|
struct h2_stream_ctx *stream = NULL;
|
|
CURLcode result;
|
|
ssize_t nread;
|
|
(void)source;
|
|
|
|
(void)cf;
|
|
if(stream_id) {
|
|
/* get the stream from the hash based on Stream ID, stream ID zero is for
|
|
connection-oriented stuff */
|
|
data_s = nghttp2_session_get_stream_user_data(session, stream_id);
|
|
if(!data_s)
|
|
/* Receiving a Stream ID not in the hash should not happen, this is an
|
|
internal error more than anything else! */
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
|
|
stream = H2_STREAM_CTX(ctx, data_s);
|
|
if(!stream)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
}
|
|
else
|
|
return NGHTTP2_ERR_INVALID_ARGUMENT;
|
|
|
|
nread = Curl_bufq_read(&stream->sendbuf, buf, length, &result);
|
|
if(nread < 0) {
|
|
if(result != CURLE_AGAIN)
|
|
return NGHTTP2_ERR_CALLBACK_FAILURE;
|
|
nread = 0;
|
|
}
|
|
|
|
if(nread > 0 && stream->upload_left != -1)
|
|
stream->upload_left -= nread;
|
|
|
|
CURL_TRC_CF(data_s, cf, "[%d] req_body_read(len=%zu) left=%"
|
|
CURL_FORMAT_CURL_OFF_T " -> %zd, %d",
|
|
stream_id, length, stream->upload_left, nread, result);
|
|
|
|
if(stream->upload_left == 0)
|
|
*data_flags = NGHTTP2_DATA_FLAG_EOF;
|
|
else if(nread == 0)
|
|
return NGHTTP2_ERR_DEFERRED;
|
|
|
|
return nread;
|
|
}
|
|
|
|
#if !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
|
static int error_callback(nghttp2_session *session,
|
|
const char *msg,
|
|
size_t len,
|
|
void *userp)
|
|
{
|
|
struct Curl_cfilter *cf = userp;
|
|
struct Curl_easy *data = CF_DATA_CURRENT(cf);
|
|
(void)session;
|
|
failf(data, "%.*s", (int)len, msg);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Append headers to ask for an HTTP1.1 to HTTP2 upgrade.
|
|
*/
|
|
CURLcode Curl_http2_request_upgrade(struct dynbuf *req,
|
|
struct Curl_easy *data)
|
|
{
|
|
CURLcode result;
|
|
char *base64;
|
|
size_t blen;
|
|
struct SingleRequest *k = &data->req;
|
|
uint8_t binsettings[H2_BINSETTINGS_LEN];
|
|
ssize_t binlen; /* length of the binsettings data */
|
|
|
|
binlen = populate_binsettings(binsettings, data);
|
|
if(binlen <= 0) {
|
|
failf(data, "nghttp2 unexpectedly failed on pack_settings_payload");
|
|
Curl_dyn_free(req);
|
|
return CURLE_FAILED_INIT;
|
|
}
|
|
|
|
result = Curl_base64url_encode((const char *)binsettings, (size_t)binlen,
|
|
&base64, &blen);
|
|
if(result) {
|
|
Curl_dyn_free(req);
|
|
return result;
|
|
}
|
|
|
|
result = Curl_dyn_addf(req,
|
|
"Connection: Upgrade, HTTP2-Settings\r\n"
|
|
"Upgrade: %s\r\n"
|
|
"HTTP2-Settings: %s\r\n",
|
|
NGHTTP2_CLEARTEXT_PROTO_VERSION_ID, base64);
|
|
free(base64);
|
|
|
|
k->upgr101 = UPGR101_H2;
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode http2_data_done_send(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
CURLcode result = CURLE_OK;
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
|
|
if(!ctx || !ctx->h2 || !stream)
|
|
goto out;
|
|
|
|
CURL_TRC_CF(data, cf, "[%d] data done send", stream->id);
|
|
if(!stream->send_closed) {
|
|
stream->send_closed = TRUE;
|
|
if(stream->upload_left) {
|
|
/* we now know that everything that is buffered is all there is. */
|
|
stream->upload_left = Curl_bufq_len(&stream->sendbuf);
|
|
/* resume sending here to trigger the callback to get called again so
|
|
that it can signal EOF to nghttp2 */
|
|
(void)nghttp2_session_resume_data(ctx->h2, stream->id);
|
|
drain_stream(cf, data, stream);
|
|
}
|
|
}
|
|
|
|
out:
|
|
return result;
|
|
}
|
|
|
|
static ssize_t http2_handle_stream_close(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
struct h2_stream_ctx *stream,
|
|
CURLcode *err)
|
|
{
|
|
ssize_t rv = 0;
|
|
|
|
if(stream->error == NGHTTP2_REFUSED_STREAM) {
|
|
CURL_TRC_CF(data, cf, "[%d] REFUSED_STREAM, try again on a new "
|
|
"connection", stream->id);
|
|
connclose(cf->conn, "REFUSED_STREAM"); /* don't use this anymore */
|
|
data->state.refused_stream = TRUE;
|
|
*err = CURLE_RECV_ERROR; /* trigger Curl_retry_request() later */
|
|
return -1;
|
|
}
|
|
else if(stream->error != NGHTTP2_NO_ERROR) {
|
|
if(stream->resp_hds_complete && data->req.no_body) {
|
|
CURL_TRC_CF(data, cf, "[%d] error after response headers, but we did "
|
|
"not want a body anyway, ignore: %s (err %u)",
|
|
stream->id, nghttp2_http2_strerror(stream->error),
|
|
stream->error);
|
|
stream->close_handled = TRUE;
|
|
*err = CURLE_OK;
|
|
goto out;
|
|
}
|
|
failf(data, "HTTP/2 stream %u was not closed cleanly: %s (err %u)",
|
|
stream->id, nghttp2_http2_strerror(stream->error),
|
|
stream->error);
|
|
*err = CURLE_HTTP2_STREAM;
|
|
return -1;
|
|
}
|
|
else if(stream->reset) {
|
|
failf(data, "HTTP/2 stream %u was reset", stream->id);
|
|
*err = data->req.bytecount? CURLE_PARTIAL_FILE : CURLE_HTTP2;
|
|
return -1;
|
|
}
|
|
|
|
if(!stream->bodystarted) {
|
|
failf(data, "HTTP/2 stream %u was closed cleanly, but before getting "
|
|
" all response header fields, treated as error",
|
|
stream->id);
|
|
*err = CURLE_HTTP2_STREAM;
|
|
return -1;
|
|
}
|
|
|
|
if(Curl_dynhds_count(&stream->resp_trailers)) {
|
|
struct dynhds_entry *e;
|
|
struct dynbuf dbuf;
|
|
size_t i;
|
|
|
|
*err = CURLE_OK;
|
|
Curl_dyn_init(&dbuf, DYN_TRAILERS);
|
|
for(i = 0; i < Curl_dynhds_count(&stream->resp_trailers); ++i) {
|
|
e = Curl_dynhds_getn(&stream->resp_trailers, i);
|
|
if(!e)
|
|
break;
|
|
Curl_dyn_reset(&dbuf);
|
|
*err = Curl_dyn_addf(&dbuf, "%.*s: %.*s\x0d\x0a",
|
|
(int)e->namelen, e->name,
|
|
(int)e->valuelen, e->value);
|
|
if(*err)
|
|
break;
|
|
Curl_debug(data, CURLINFO_HEADER_IN, Curl_dyn_ptr(&dbuf),
|
|
Curl_dyn_len(&dbuf));
|
|
*err = Curl_client_write(data, CLIENTWRITE_HEADER|CLIENTWRITE_TRAILER,
|
|
Curl_dyn_ptr(&dbuf), Curl_dyn_len(&dbuf));
|
|
if(*err)
|
|
break;
|
|
}
|
|
Curl_dyn_free(&dbuf);
|
|
if(*err)
|
|
goto out;
|
|
}
|
|
|
|
stream->close_handled = TRUE;
|
|
*err = CURLE_OK;
|
|
rv = 0;
|
|
|
|
out:
|
|
CURL_TRC_CF(data, cf, "handle_stream_close -> %zd, %d", rv, *err);
|
|
return rv;
|
|
}
|
|
|
|
static int sweight_wanted(const struct Curl_easy *data)
|
|
{
|
|
/* 0 weight is not set by user and we take the nghttp2 default one */
|
|
return data->set.priority.weight?
|
|
data->set.priority.weight : NGHTTP2_DEFAULT_WEIGHT;
|
|
}
|
|
|
|
static int sweight_in_effect(const struct Curl_easy *data)
|
|
{
|
|
/* 0 weight is not set by user and we take the nghttp2 default one */
|
|
return data->state.priority.weight?
|
|
data->state.priority.weight : NGHTTP2_DEFAULT_WEIGHT;
|
|
}
|
|
|
|
/*
|
|
* h2_pri_spec() fills in the pri_spec struct, used by nghttp2 to send weight
|
|
* and dependency to the peer. It also stores the updated values in the state
|
|
* struct.
|
|
*/
|
|
|
|
static void h2_pri_spec(struct cf_h2_ctx *ctx,
|
|
struct Curl_easy *data,
|
|
nghttp2_priority_spec *pri_spec)
|
|
{
|
|
struct Curl_data_priority *prio = &data->set.priority;
|
|
struct h2_stream_ctx *depstream = H2_STREAM_CTX(ctx, prio->parent);
|
|
int32_t depstream_id = depstream? depstream->id:0;
|
|
nghttp2_priority_spec_init(pri_spec, depstream_id,
|
|
sweight_wanted(data),
|
|
data->set.priority.exclusive);
|
|
data->state.priority = *prio;
|
|
}
|
|
|
|
/*
|
|
* Check if there's been an update in the priority /
|
|
* dependency settings and if so it submits a PRIORITY frame with the updated
|
|
* info.
|
|
* Flush any out data pending in the network buffer.
|
|
*/
|
|
static CURLcode h2_progress_egress(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
int rv = 0;
|
|
|
|
if(stream && stream->id > 0 &&
|
|
((sweight_wanted(data) != sweight_in_effect(data)) ||
|
|
(data->set.priority.exclusive != data->state.priority.exclusive) ||
|
|
(data->set.priority.parent != data->state.priority.parent)) ) {
|
|
/* send new weight and/or dependency */
|
|
nghttp2_priority_spec pri_spec;
|
|
|
|
h2_pri_spec(ctx, data, &pri_spec);
|
|
CURL_TRC_CF(data, cf, "[%d] Queuing PRIORITY", stream->id);
|
|
DEBUGASSERT(stream->id != -1);
|
|
rv = nghttp2_submit_priority(ctx->h2, NGHTTP2_FLAG_NONE,
|
|
stream->id, &pri_spec);
|
|
if(rv)
|
|
goto out;
|
|
}
|
|
|
|
ctx->nw_out_blocked = 0;
|
|
while(!rv && !ctx->nw_out_blocked && nghttp2_session_want_write(ctx->h2))
|
|
rv = nghttp2_session_send(ctx->h2);
|
|
|
|
out:
|
|
if(nghttp2_is_fatal(rv)) {
|
|
CURL_TRC_CF(data, cf, "nghttp2_session_send error (%s)%d",
|
|
nghttp2_strerror(rv), rv);
|
|
return CURLE_SEND_ERROR;
|
|
}
|
|
return nw_out_flush(cf, data);
|
|
}
|
|
|
|
static ssize_t stream_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
|
|
struct h2_stream_ctx *stream,
|
|
char *buf, size_t len, CURLcode *err)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
ssize_t nread = -1;
|
|
|
|
(void)buf;
|
|
*err = CURLE_AGAIN;
|
|
if(stream->xfer_result) {
|
|
CURL_TRC_CF(data, cf, "[%d] xfer write failed", stream->id);
|
|
*err = stream->xfer_result;
|
|
nread = -1;
|
|
}
|
|
else if(stream->closed) {
|
|
CURL_TRC_CF(data, cf, "[%d] returning CLOSE", stream->id);
|
|
nread = http2_handle_stream_close(cf, data, stream, err);
|
|
}
|
|
else if(stream->reset ||
|
|
(ctx->conn_closed && Curl_bufq_is_empty(&ctx->inbufq)) ||
|
|
(ctx->rcvd_goaway && ctx->remote_max_sid < stream->id)) {
|
|
CURL_TRC_CF(data, cf, "[%d] returning ERR", stream->id);
|
|
*err = data->req.bytecount? CURLE_PARTIAL_FILE : CURLE_HTTP2;
|
|
nread = -1;
|
|
}
|
|
|
|
if(nread < 0 && *err != CURLE_AGAIN)
|
|
CURL_TRC_CF(data, cf, "[%d] stream_recv(len=%zu) -> %zd, %d",
|
|
stream->id, len, nread, *err);
|
|
return nread;
|
|
}
|
|
|
|
static CURLcode h2_progress_ingress(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
size_t data_max_bytes)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream;
|
|
CURLcode result = CURLE_OK;
|
|
ssize_t nread;
|
|
|
|
/* Process network input buffer fist */
|
|
if(!Curl_bufq_is_empty(&ctx->inbufq)) {
|
|
CURL_TRC_CF(data, cf, "Process %zu bytes in connection buffer",
|
|
Curl_bufq_len(&ctx->inbufq));
|
|
if(h2_process_pending_input(cf, data, &result) < 0)
|
|
return result;
|
|
}
|
|
|
|
/* Receive data from the "lower" filters, e.g. network until
|
|
* it is time to stop due to connection close or us not processing
|
|
* all network input */
|
|
while(!ctx->conn_closed && Curl_bufq_is_empty(&ctx->inbufq)) {
|
|
stream = H2_STREAM_CTX(ctx, data);
|
|
if(stream && (stream->closed || !data_max_bytes)) {
|
|
/* We would like to abort here and stop processing, so that
|
|
* the transfer loop can handle the data/close here. However,
|
|
* this may leave data in underlying buffers that will not
|
|
* be consumed. */
|
|
if(!cf->next || !cf->next->cft->has_data_pending(cf->next, data))
|
|
drain_stream(cf, data, stream);
|
|
break;
|
|
}
|
|
|
|
nread = Curl_bufq_sipn(&ctx->inbufq, 0, nw_in_reader, cf, &result);
|
|
if(nread < 0) {
|
|
if(result != CURLE_AGAIN) {
|
|
failf(data, "Failed receiving HTTP2 data: %d(%s)", result,
|
|
curl_easy_strerror(result));
|
|
return result;
|
|
}
|
|
break;
|
|
}
|
|
else if(nread == 0) {
|
|
CURL_TRC_CF(data, cf, "[0] ingress: connection closed");
|
|
ctx->conn_closed = TRUE;
|
|
break;
|
|
}
|
|
else {
|
|
CURL_TRC_CF(data, cf, "[0] ingress: read %zd bytes", nread);
|
|
data_max_bytes = (data_max_bytes > (size_t)nread)?
|
|
(data_max_bytes - (size_t)nread) : 0;
|
|
}
|
|
|
|
if(h2_process_pending_input(cf, data, &result))
|
|
return result;
|
|
}
|
|
|
|
if(ctx->conn_closed && Curl_bufq_is_empty(&ctx->inbufq)) {
|
|
connclose(cf->conn, "GOAWAY received");
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static ssize_t cf_h2_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
|
|
char *buf, size_t len, CURLcode *err)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
ssize_t nread = -1;
|
|
CURLcode result;
|
|
struct cf_call_data save;
|
|
|
|
if(!stream) {
|
|
/* Abnormal call sequence: either this transfer has never opened a stream
|
|
* (unlikely) or the transfer has been done, cleaned up its resources, but
|
|
* a read() is called anyway. It is not clear what the calling sequence
|
|
* is for such a case. */
|
|
failf(data, "[%zd-%zd], http/2 recv on a transfer never opened "
|
|
"or already cleared", (ssize_t)data->id,
|
|
(ssize_t)cf->conn->connection_id);
|
|
*err = CURLE_HTTP2;
|
|
return -1;
|
|
}
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
|
|
nread = stream_recv(cf, data, stream, buf, len, err);
|
|
if(nread < 0 && *err != CURLE_AGAIN)
|
|
goto out;
|
|
|
|
if(nread < 0) {
|
|
*err = h2_progress_ingress(cf, data, len);
|
|
if(*err)
|
|
goto out;
|
|
|
|
nread = stream_recv(cf, data, stream, buf, len, err);
|
|
}
|
|
|
|
if(nread > 0) {
|
|
size_t data_consumed = (size_t)nread;
|
|
/* Now that we transferred this to the upper layer, we report
|
|
* the actual amount of DATA consumed to the H2 session, so
|
|
* that it adjusts stream flow control */
|
|
if(stream->resp_hds_len >= data_consumed) {
|
|
stream->resp_hds_len -= data_consumed; /* no DATA */
|
|
}
|
|
else {
|
|
if(stream->resp_hds_len) {
|
|
data_consumed -= stream->resp_hds_len;
|
|
stream->resp_hds_len = 0;
|
|
}
|
|
if(data_consumed) {
|
|
nghttp2_session_consume(ctx->h2, stream->id, data_consumed);
|
|
}
|
|
}
|
|
|
|
if(stream->closed) {
|
|
CURL_TRC_CF(data, cf, "[%d] DRAIN closed stream", stream->id);
|
|
drain_stream(cf, data, stream);
|
|
}
|
|
}
|
|
|
|
out:
|
|
result = h2_progress_egress(cf, data);
|
|
if(result == CURLE_AGAIN) {
|
|
/* pending data to send, need to be called again. Ideally, we'd
|
|
* monitor the socket for POLLOUT, but we might not be in SENDING
|
|
* transfer state any longer and are unable to make this happen.
|
|
*/
|
|
drain_stream(cf, data, stream);
|
|
}
|
|
else if(result) {
|
|
*err = result;
|
|
nread = -1;
|
|
}
|
|
CURL_TRC_CF(data, cf, "[%d] cf_recv(len=%zu) -> %zd %d, "
|
|
"window=%d/%d, connection %d/%d",
|
|
stream->id, len, nread, *err,
|
|
nghttp2_session_get_stream_effective_recv_data_length(
|
|
ctx->h2, stream->id),
|
|
nghttp2_session_get_stream_effective_local_window_size(
|
|
ctx->h2, stream->id),
|
|
nghttp2_session_get_local_window_size(ctx->h2),
|
|
HTTP2_HUGE_WINDOW_SIZE);
|
|
|
|
CF_DATA_RESTORE(cf, save);
|
|
return nread;
|
|
}
|
|
|
|
static ssize_t h2_submit(struct h2_stream_ctx **pstream,
|
|
struct Curl_cfilter *cf, struct Curl_easy *data,
|
|
const void *buf, size_t len,
|
|
size_t *phdslen, CURLcode *err)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream = NULL;
|
|
struct dynhds h2_headers;
|
|
nghttp2_nv *nva = NULL;
|
|
const void *body = NULL;
|
|
size_t nheader, bodylen, i;
|
|
nghttp2_data_provider data_prd;
|
|
int32_t stream_id;
|
|
nghttp2_priority_spec pri_spec;
|
|
ssize_t nwritten;
|
|
|
|
*phdslen = 0;
|
|
Curl_dynhds_init(&h2_headers, 0, DYN_HTTP_REQUEST);
|
|
|
|
*err = http2_data_setup(cf, data, &stream);
|
|
if(*err) {
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
|
|
nwritten = Curl_h1_req_parse_read(&stream->h1, buf, len, NULL, 0, err);
|
|
if(nwritten < 0)
|
|
goto out;
|
|
*phdslen = (size_t)nwritten;
|
|
if(!stream->h1.done) {
|
|
/* need more data */
|
|
goto out;
|
|
}
|
|
DEBUGASSERT(stream->h1.req);
|
|
|
|
*err = Curl_http_req_to_h2(&h2_headers, stream->h1.req, data);
|
|
if(*err) {
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
/* no longer needed */
|
|
Curl_h1_req_parse_free(&stream->h1);
|
|
|
|
nva = Curl_dynhds_to_nva(&h2_headers, &nheader);
|
|
if(!nva) {
|
|
*err = CURLE_OUT_OF_MEMORY;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
|
|
h2_pri_spec(ctx, data, &pri_spec);
|
|
if(!nghttp2_session_check_request_allowed(ctx->h2))
|
|
CURL_TRC_CF(data, cf, "send request NOT allowed (via nghttp2)");
|
|
|
|
switch(data->state.httpreq) {
|
|
case HTTPREQ_POST:
|
|
case HTTPREQ_POST_FORM:
|
|
case HTTPREQ_POST_MIME:
|
|
case HTTPREQ_PUT:
|
|
if(data->state.infilesize != -1)
|
|
stream->upload_left = data->state.infilesize;
|
|
else
|
|
/* data sending without specifying the data amount up front */
|
|
stream->upload_left = -1; /* unknown */
|
|
|
|
data_prd.read_callback = req_body_read_callback;
|
|
data_prd.source.ptr = NULL;
|
|
stream_id = nghttp2_submit_request(ctx->h2, &pri_spec, nva, nheader,
|
|
&data_prd, data);
|
|
break;
|
|
default:
|
|
stream->upload_left = 0; /* no request body */
|
|
stream_id = nghttp2_submit_request(ctx->h2, &pri_spec, nva, nheader,
|
|
NULL, data);
|
|
}
|
|
|
|
if(stream_id < 0) {
|
|
CURL_TRC_CF(data, cf, "send: nghttp2_submit_request error (%s)%u",
|
|
nghttp2_strerror(stream_id), stream_id);
|
|
*err = CURLE_SEND_ERROR;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
|
|
#define MAX_ACC 60000 /* <64KB to account for some overhead */
|
|
if(Curl_trc_is_verbose(data)) {
|
|
size_t acc = 0;
|
|
|
|
infof(data, "[HTTP/2] [%d] OPENED stream for %s",
|
|
stream_id, data->state.url);
|
|
for(i = 0; i < nheader; ++i) {
|
|
acc += nva[i].namelen + nva[i].valuelen;
|
|
|
|
infof(data, "[HTTP/2] [%d] [%.*s: %.*s]", stream_id,
|
|
(int)nva[i].namelen, nva[i].name,
|
|
(int)nva[i].valuelen, nva[i].value);
|
|
}
|
|
|
|
if(acc > MAX_ACC) {
|
|
infof(data, "[HTTP/2] Warning: The cumulative length of all "
|
|
"headers exceeds %d bytes and that could cause the "
|
|
"stream to be rejected.", MAX_ACC);
|
|
}
|
|
}
|
|
|
|
stream->id = stream_id;
|
|
stream->local_window_size = H2_STREAM_WINDOW_SIZE;
|
|
if(data->set.max_recv_speed) {
|
|
/* We are asked to only receive `max_recv_speed` bytes per second.
|
|
* Let's limit our stream window size around that, otherwise the server
|
|
* will send in large bursts only. We make the window 50% larger to
|
|
* allow for data in flight and avoid stalling. */
|
|
curl_off_t n = (((data->set.max_recv_speed - 1) / H2_CHUNK_SIZE) + 1);
|
|
n += CURLMAX((n/2), 1);
|
|
if(n < (H2_STREAM_WINDOW_SIZE / H2_CHUNK_SIZE) &&
|
|
n < (UINT_MAX / H2_CHUNK_SIZE)) {
|
|
stream->local_window_size = (uint32_t)n * H2_CHUNK_SIZE;
|
|
}
|
|
}
|
|
|
|
body = (const char *)buf + nwritten;
|
|
bodylen = len - nwritten;
|
|
|
|
if(bodylen) {
|
|
/* We have request body to send in DATA frame */
|
|
ssize_t n = Curl_bufq_write(&stream->sendbuf, body, bodylen, err);
|
|
if(n < 0) {
|
|
*err = CURLE_SEND_ERROR;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
nwritten += n;
|
|
}
|
|
|
|
out:
|
|
CURL_TRC_CF(data, cf, "[%d] submit -> %zd, %d",
|
|
stream? stream->id : -1, nwritten, *err);
|
|
Curl_safefree(nva);
|
|
*pstream = stream;
|
|
Curl_dynhds_free(&h2_headers);
|
|
return nwritten;
|
|
}
|
|
|
|
static ssize_t cf_h2_send(struct Curl_cfilter *cf, struct Curl_easy *data,
|
|
const void *buf, size_t len, CURLcode *err)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
struct cf_call_data save;
|
|
int rv;
|
|
ssize_t nwritten;
|
|
size_t hdslen = 0;
|
|
CURLcode result;
|
|
int blocked = 0, was_blocked = 0;
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
|
|
if(stream && stream->id != -1) {
|
|
if(stream->upload_blocked_len) {
|
|
/* the data in `buf` has already been submitted or added to the
|
|
* buffers, but have been EAGAINed on the last invocation. */
|
|
/* TODO: this assertion triggers in OSSFuzz runs and it is not
|
|
* clear why. Disable for now to let OSSFuzz continue its tests. */
|
|
DEBUGASSERT(len >= stream->upload_blocked_len);
|
|
if(len < stream->upload_blocked_len) {
|
|
/* Did we get called again with a smaller `len`? This should not
|
|
* happen. We are not prepared to handle that. */
|
|
failf(data, "HTTP/2 send again with decreased length (%zd vs %zd)",
|
|
len, stream->upload_blocked_len);
|
|
*err = CURLE_HTTP2;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
nwritten = (ssize_t)stream->upload_blocked_len;
|
|
stream->upload_blocked_len = 0;
|
|
was_blocked = 1;
|
|
}
|
|
else if(stream->closed) {
|
|
if(stream->resp_hds_complete) {
|
|
/* Server decided to close the stream after having sent us a findl
|
|
* response. This is valid if it is not interested in the request
|
|
* body. This happens on 30x or 40x responses.
|
|
* We silently discard the data sent, since this is not a transport
|
|
* error situation. */
|
|
CURL_TRC_CF(data, cf, "[%d] discarding data"
|
|
"on closed stream with response", stream->id);
|
|
*err = CURLE_OK;
|
|
nwritten = (ssize_t)len;
|
|
goto out;
|
|
}
|
|
infof(data, "stream %u closed", stream->id);
|
|
*err = CURLE_SEND_ERROR;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
else {
|
|
/* If stream_id != -1, we have dispatched request HEADERS and
|
|
* optionally request body, and now are going to send or sending
|
|
* more request body in DATA frame */
|
|
nwritten = Curl_bufq_write(&stream->sendbuf, buf, len, err);
|
|
if(nwritten < 0 && *err != CURLE_AGAIN)
|
|
goto out;
|
|
}
|
|
|
|
if(!Curl_bufq_is_empty(&stream->sendbuf)) {
|
|
/* req body data is buffered, resume the potentially suspended stream */
|
|
rv = nghttp2_session_resume_data(ctx->h2, stream->id);
|
|
if(nghttp2_is_fatal(rv)) {
|
|
*err = CURLE_SEND_ERROR;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
nwritten = h2_submit(&stream, cf, data, buf, len, &hdslen, err);
|
|
if(nwritten < 0) {
|
|
goto out;
|
|
}
|
|
DEBUGASSERT(stream);
|
|
DEBUGASSERT(hdslen <= (size_t)nwritten);
|
|
}
|
|
|
|
/* Call the nghttp2 send loop and flush to write ALL buffered data,
|
|
* headers and/or request body completely out to the network */
|
|
result = h2_progress_egress(cf, data);
|
|
/* if the stream has been closed in egress handling (nghttp2 does that
|
|
* when it does not like the headers, for example */
|
|
if(stream && stream->closed && !was_blocked) {
|
|
infof(data, "stream %u closed", stream->id);
|
|
*err = CURLE_SEND_ERROR;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
else if(result == CURLE_AGAIN) {
|
|
blocked = 1;
|
|
}
|
|
else if(result) {
|
|
*err = result;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
else if(stream && !Curl_bufq_is_empty(&stream->sendbuf)) {
|
|
/* although we wrote everything that nghttp2 wants to send now,
|
|
* there is data left in our stream send buffer unwritten. This may
|
|
* be due to the stream's HTTP/2 flow window being exhausted. */
|
|
blocked = 1;
|
|
}
|
|
|
|
if(stream && blocked && nwritten > 0) {
|
|
/* Unable to send all data, due to connection blocked or H2 window
|
|
* exhaustion. Data is left in our stream buffer, or nghttp2's internal
|
|
* frame buffer or our network out buffer. */
|
|
size_t rwin = (size_t)nghttp2_session_get_stream_remote_window_size(
|
|
ctx->h2, stream->id);
|
|
/* At the start of a stream, we are called with request headers
|
|
* and, possibly, parts of the body. Later, only body data.
|
|
* If we cannot send pure body data, we EAGAIN. If there had been
|
|
* header, we return that *they* have been written and remember the
|
|
* block on the data length only. */
|
|
stream->upload_blocked_len = ((size_t)nwritten) - hdslen;
|
|
CURL_TRC_CF(data, cf, "[%d] cf_send(len=%zu) BLOCK: win %u/%zu "
|
|
"hds_len=%zu blocked_len=%zu",
|
|
stream->id, len,
|
|
nghttp2_session_get_remote_window_size(ctx->h2), rwin,
|
|
hdslen, stream->upload_blocked_len);
|
|
if(hdslen) {
|
|
*err = CURLE_OK;
|
|
nwritten = hdslen;
|
|
}
|
|
else {
|
|
*err = CURLE_AGAIN;
|
|
nwritten = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
else if(should_close_session(ctx)) {
|
|
/* nghttp2 thinks this session is done. If the stream has not been
|
|
* closed, this is an error state for out transfer */
|
|
if(stream->closed) {
|
|
nwritten = http2_handle_stream_close(cf, data, stream, err);
|
|
}
|
|
else {
|
|
CURL_TRC_CF(data, cf, "send: nothing to do in this session");
|
|
*err = CURLE_HTTP2;
|
|
nwritten = -1;
|
|
}
|
|
}
|
|
|
|
out:
|
|
if(stream) {
|
|
CURL_TRC_CF(data, cf, "[%d] cf_send(len=%zu) -> %zd, %d, "
|
|
"upload_left=%" CURL_FORMAT_CURL_OFF_T ", "
|
|
"h2 windows %d-%d (stream-conn), "
|
|
"buffers %zu-%zu (stream-conn)",
|
|
stream->id, len, nwritten, *err,
|
|
stream->upload_left,
|
|
nghttp2_session_get_stream_remote_window_size(
|
|
ctx->h2, stream->id),
|
|
nghttp2_session_get_remote_window_size(ctx->h2),
|
|
Curl_bufq_len(&stream->sendbuf),
|
|
Curl_bufq_len(&ctx->outbufq));
|
|
}
|
|
else {
|
|
CURL_TRC_CF(data, cf, "cf_send(len=%zu) -> %zd, %d, "
|
|
"connection-window=%d, nw_send_buffer(%zu)",
|
|
len, nwritten, *err,
|
|
nghttp2_session_get_remote_window_size(ctx->h2),
|
|
Curl_bufq_len(&ctx->outbufq));
|
|
}
|
|
CF_DATA_RESTORE(cf, save);
|
|
return nwritten;
|
|
}
|
|
|
|
static void cf_h2_adjust_pollset(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
struct easy_pollset *ps)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct cf_call_data save;
|
|
curl_socket_t sock;
|
|
bool want_recv, want_send;
|
|
|
|
if(!ctx->h2)
|
|
return;
|
|
|
|
sock = Curl_conn_cf_get_socket(cf, data);
|
|
Curl_pollset_check(data, ps, sock, &want_recv, &want_send);
|
|
if(want_recv || want_send) {
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
bool c_exhaust, s_exhaust;
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
c_exhaust = want_send && !nghttp2_session_get_remote_window_size(ctx->h2);
|
|
s_exhaust = want_send && stream && stream->id >= 0 &&
|
|
!nghttp2_session_get_stream_remote_window_size(ctx->h2,
|
|
stream->id);
|
|
want_recv = (want_recv || c_exhaust || s_exhaust);
|
|
want_send = (!s_exhaust && want_send) ||
|
|
(!c_exhaust && nghttp2_session_want_write(ctx->h2));
|
|
|
|
Curl_pollset_set(data, ps, sock, want_recv, want_send);
|
|
CF_DATA_RESTORE(cf, save);
|
|
}
|
|
else if(ctx->sent_goaway && !ctx->shutdown) {
|
|
/* shutdown in progress */
|
|
CF_DATA_SAVE(save, cf, data);
|
|
want_send = nghttp2_session_want_write(ctx->h2);
|
|
want_recv = nghttp2_session_want_read(ctx->h2);
|
|
Curl_pollset_set(data, ps, sock, want_recv, want_send);
|
|
CF_DATA_RESTORE(cf, save);
|
|
}
|
|
}
|
|
|
|
static CURLcode cf_h2_connect(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
bool blocking, bool *done)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
CURLcode result = CURLE_OK;
|
|
struct cf_call_data save;
|
|
|
|
if(cf->connected) {
|
|
*done = TRUE;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* Connect the lower filters first */
|
|
if(!cf->next->connected) {
|
|
result = Curl_conn_cf_connect(cf->next, data, blocking, done);
|
|
if(result || !*done)
|
|
return result;
|
|
}
|
|
|
|
*done = FALSE;
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
if(!ctx->h2) {
|
|
result = cf_h2_ctx_init(cf, data, FALSE);
|
|
if(result)
|
|
goto out;
|
|
}
|
|
|
|
result = h2_progress_ingress(cf, data, H2_CHUNK_SIZE);
|
|
if(result)
|
|
goto out;
|
|
|
|
/* Send out our SETTINGS and ACKs and such. If that blocks, we
|
|
* have it buffered and can count this filter as being connected */
|
|
result = h2_progress_egress(cf, data);
|
|
if(result == CURLE_AGAIN)
|
|
result = CURLE_OK;
|
|
else if(result)
|
|
goto out;
|
|
|
|
*done = TRUE;
|
|
cf->connected = TRUE;
|
|
result = CURLE_OK;
|
|
|
|
out:
|
|
CURL_TRC_CF(data, cf, "cf_connect() -> %d, %d, ", result, *done);
|
|
CF_DATA_RESTORE(cf, save);
|
|
return result;
|
|
}
|
|
|
|
static void cf_h2_close(struct Curl_cfilter *cf, struct Curl_easy *data)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
|
|
if(ctx) {
|
|
struct cf_call_data save;
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
cf_h2_ctx_clear(ctx);
|
|
CF_DATA_RESTORE(cf, save);
|
|
cf->connected = FALSE;
|
|
}
|
|
if(cf->next)
|
|
cf->next->cft->do_close(cf->next, data);
|
|
}
|
|
|
|
static void cf_h2_destroy(struct Curl_cfilter *cf, struct Curl_easy *data)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
|
|
(void)data;
|
|
if(ctx) {
|
|
cf_h2_ctx_free(ctx);
|
|
cf->ctx = NULL;
|
|
}
|
|
}
|
|
|
|
static CURLcode cf_h2_shutdown(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data, bool *done)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
CURLcode result;
|
|
int rv;
|
|
|
|
if(!cf->connected || !ctx->h2 || ctx->shutdown) {
|
|
*done = TRUE;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
if(!ctx->sent_goaway) {
|
|
rv = nghttp2_submit_goaway(ctx->h2, NGHTTP2_FLAG_NONE,
|
|
ctx->local_max_sid, 0,
|
|
(const uint8_t *)"shutown", sizeof("shutown"));
|
|
if(rv) {
|
|
failf(data, "nghttp2_submit_goaway() failed: %s(%d)",
|
|
nghttp2_strerror(rv), rv);
|
|
return CURLE_SEND_ERROR;
|
|
}
|
|
ctx->sent_goaway = TRUE;
|
|
}
|
|
/* GOAWAY submitted, process egress and ingress until nghttp2 is done. */
|
|
result = CURLE_OK;
|
|
if(nghttp2_session_want_write(ctx->h2))
|
|
result = h2_progress_egress(cf, data);
|
|
if(!result && nghttp2_session_want_read(ctx->h2))
|
|
result = h2_progress_ingress(cf, data, 0);
|
|
|
|
*done = !result && !nghttp2_session_want_write(ctx->h2) &&
|
|
!nghttp2_session_want_read(ctx->h2);
|
|
ctx->shutdown = (result || *done);
|
|
return result;
|
|
}
|
|
|
|
static CURLcode http2_data_pause(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
bool pause)
|
|
{
|
|
#ifdef NGHTTP2_HAS_SET_LOCAL_WINDOW_SIZE
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
|
|
DEBUGASSERT(data);
|
|
if(ctx && ctx->h2 && stream) {
|
|
uint32_t window = pause? 0 : stream->local_window_size;
|
|
|
|
int rv = (int)nghttp2_session_set_local_window_size(ctx->h2,
|
|
NGHTTP2_FLAG_NONE,
|
|
stream->id,
|
|
(int32_t)window);
|
|
if(rv) {
|
|
failf(data, "nghttp2_session_set_local_window_size() failed: %s(%d)",
|
|
nghttp2_strerror(rv), rv);
|
|
return CURLE_HTTP2;
|
|
}
|
|
|
|
if(!pause)
|
|
drain_stream(cf, data, stream);
|
|
|
|
/* attempt to send the window update */
|
|
(void)h2_progress_egress(cf, data);
|
|
|
|
if(!pause) {
|
|
/* Unpausing a h2 transfer, requires it to be run again. The server
|
|
* may send new DATA on us increasing the flow window, and it may
|
|
* not. We may have already buffered and exhausted the new window
|
|
* by operating on things in flight during the handling of other
|
|
* transfers. */
|
|
drain_stream(cf, data, stream);
|
|
Curl_expire(data, 0, EXPIRE_RUN_NOW);
|
|
}
|
|
DEBUGF(infof(data, "Set HTTP/2 window size to %u for stream %u",
|
|
window, stream->id));
|
|
|
|
#ifdef DEBUGBUILD
|
|
{
|
|
/* read out the stream local window again */
|
|
uint32_t window2 = (uint32_t)
|
|
nghttp2_session_get_stream_local_window_size(ctx->h2,
|
|
stream->id);
|
|
DEBUGF(infof(data, "HTTP/2 window size is now %u for stream %u",
|
|
window2, stream->id));
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static CURLcode cf_h2_cntrl(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
int event, int arg1, void *arg2)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct cf_call_data save;
|
|
|
|
(void)arg2;
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
switch(event) {
|
|
case CF_CTRL_DATA_SETUP:
|
|
break;
|
|
case CF_CTRL_DATA_PAUSE:
|
|
result = http2_data_pause(cf, data, (arg1 != 0));
|
|
break;
|
|
case CF_CTRL_DATA_DONE_SEND:
|
|
result = http2_data_done_send(cf, data);
|
|
break;
|
|
case CF_CTRL_DATA_DETACH:
|
|
http2_data_done(cf, data);
|
|
break;
|
|
case CF_CTRL_DATA_DONE:
|
|
http2_data_done(cf, data);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
CF_DATA_RESTORE(cf, save);
|
|
return result;
|
|
}
|
|
|
|
static bool cf_h2_data_pending(struct Curl_cfilter *cf,
|
|
const struct Curl_easy *data)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
|
|
if(ctx && (!Curl_bufq_is_empty(&ctx->inbufq)
|
|
|| (stream && !Curl_bufq_is_empty(&stream->sendbuf))))
|
|
return TRUE;
|
|
return cf->next? cf->next->cft->has_data_pending(cf->next, data) : FALSE;
|
|
}
|
|
|
|
static bool cf_h2_is_alive(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
bool *input_pending)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
CURLcode result;
|
|
struct cf_call_data save;
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
result = (ctx && ctx->h2 && http2_connisalive(cf, data, input_pending));
|
|
CURL_TRC_CF(data, cf, "conn alive -> %d, input_pending=%d",
|
|
result, *input_pending);
|
|
CF_DATA_RESTORE(cf, save);
|
|
return result;
|
|
}
|
|
|
|
static CURLcode cf_h2_keep_alive(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data)
|
|
{
|
|
CURLcode result;
|
|
struct cf_call_data save;
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
result = http2_send_ping(cf, data);
|
|
CF_DATA_RESTORE(cf, save);
|
|
return result;
|
|
}
|
|
|
|
static CURLcode cf_h2_query(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
int query, int *pres1, void *pres2)
|
|
{
|
|
struct cf_h2_ctx *ctx = cf->ctx;
|
|
struct cf_call_data save;
|
|
size_t effective_max;
|
|
|
|
switch(query) {
|
|
case CF_QUERY_MAX_CONCURRENT:
|
|
DEBUGASSERT(pres1);
|
|
|
|
CF_DATA_SAVE(save, cf, data);
|
|
if(nghttp2_session_check_request_allowed(ctx->h2) == 0) {
|
|
/* the limit is what we have in use right now */
|
|
effective_max = CONN_INUSE(cf->conn);
|
|
}
|
|
else {
|
|
effective_max = ctx->max_concurrent_streams;
|
|
}
|
|
*pres1 = (effective_max > INT_MAX)? INT_MAX : (int)effective_max;
|
|
CF_DATA_RESTORE(cf, save);
|
|
return CURLE_OK;
|
|
case CF_QUERY_STREAM_ERROR: {
|
|
struct h2_stream_ctx *stream = H2_STREAM_CTX(ctx, data);
|
|
*pres1 = stream? (int)stream->error : 0;
|
|
return CURLE_OK;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
return cf->next?
|
|
cf->next->cft->query(cf->next, data, query, pres1, pres2) :
|
|
CURLE_UNKNOWN_OPTION;
|
|
}
|
|
|
|
struct Curl_cftype Curl_cft_nghttp2 = {
|
|
"HTTP/2",
|
|
CF_TYPE_MULTIPLEX,
|
|
CURL_LOG_LVL_NONE,
|
|
cf_h2_destroy,
|
|
cf_h2_connect,
|
|
cf_h2_close,
|
|
cf_h2_shutdown,
|
|
Curl_cf_def_get_host,
|
|
cf_h2_adjust_pollset,
|
|
cf_h2_data_pending,
|
|
cf_h2_send,
|
|
cf_h2_recv,
|
|
cf_h2_cntrl,
|
|
cf_h2_is_alive,
|
|
cf_h2_keep_alive,
|
|
cf_h2_query,
|
|
};
|
|
|
|
static CURLcode http2_cfilter_add(struct Curl_cfilter **pcf,
|
|
struct Curl_easy *data,
|
|
struct connectdata *conn,
|
|
int sockindex,
|
|
bool via_h1_upgrade)
|
|
{
|
|
struct Curl_cfilter *cf = NULL;
|
|
struct cf_h2_ctx *ctx;
|
|
CURLcode result = CURLE_OUT_OF_MEMORY;
|
|
|
|
DEBUGASSERT(data->conn);
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if(!ctx)
|
|
goto out;
|
|
|
|
result = Curl_cf_create(&cf, &Curl_cft_nghttp2, ctx);
|
|
if(result)
|
|
goto out;
|
|
|
|
ctx = NULL;
|
|
Curl_conn_cf_add(data, conn, sockindex, cf);
|
|
result = cf_h2_ctx_init(cf, data, via_h1_upgrade);
|
|
|
|
out:
|
|
if(result)
|
|
cf_h2_ctx_free(ctx);
|
|
*pcf = result? NULL : cf;
|
|
return result;
|
|
}
|
|
|
|
static CURLcode http2_cfilter_insert_after(struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
bool via_h1_upgrade)
|
|
{
|
|
struct Curl_cfilter *cf_h2 = NULL;
|
|
struct cf_h2_ctx *ctx;
|
|
CURLcode result = CURLE_OUT_OF_MEMORY;
|
|
|
|
(void)data;
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if(!ctx)
|
|
goto out;
|
|
|
|
result = Curl_cf_create(&cf_h2, &Curl_cft_nghttp2, ctx);
|
|
if(result)
|
|
goto out;
|
|
|
|
ctx = NULL;
|
|
Curl_conn_cf_insert_after(cf, cf_h2);
|
|
result = cf_h2_ctx_init(cf_h2, data, via_h1_upgrade);
|
|
|
|
out:
|
|
if(result)
|
|
cf_h2_ctx_free(ctx);
|
|
return result;
|
|
}
|
|
|
|
static bool Curl_cf_is_http2(struct Curl_cfilter *cf,
|
|
const struct Curl_easy *data)
|
|
{
|
|
(void)data;
|
|
for(; cf; cf = cf->next) {
|
|
if(cf->cft == &Curl_cft_nghttp2)
|
|
return TRUE;
|
|
if(cf->cft->flags & CF_TYPE_IP_CONNECT)
|
|
return FALSE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
bool Curl_conn_is_http2(const struct Curl_easy *data,
|
|
const struct connectdata *conn,
|
|
int sockindex)
|
|
{
|
|
return conn? Curl_cf_is_http2(conn->cfilter[sockindex], data) : FALSE;
|
|
}
|
|
|
|
bool Curl_http2_may_switch(struct Curl_easy *data,
|
|
struct connectdata *conn,
|
|
int sockindex)
|
|
{
|
|
(void)sockindex;
|
|
if(!Curl_conn_is_http2(data, conn, sockindex) &&
|
|
data->state.httpwant == CURL_HTTP_VERSION_2_PRIOR_KNOWLEDGE) {
|
|
#ifndef CURL_DISABLE_PROXY
|
|
if(conn->bits.httpproxy && !conn->bits.tunnel_proxy) {
|
|
/* We don't support HTTP/2 proxies yet. Also it's debatable
|
|
whether or not this setting should apply to HTTP/2 proxies. */
|
|
infof(data, "Ignoring HTTP/2 prior knowledge due to proxy");
|
|
return FALSE;
|
|
}
|
|
#endif
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
CURLcode Curl_http2_switch(struct Curl_easy *data,
|
|
struct connectdata *conn, int sockindex)
|
|
{
|
|
struct Curl_cfilter *cf;
|
|
CURLcode result;
|
|
|
|
DEBUGASSERT(!Curl_conn_is_http2(data, conn, sockindex));
|
|
DEBUGF(infof(data, "switching to HTTP/2"));
|
|
|
|
result = http2_cfilter_add(&cf, data, conn, sockindex, FALSE);
|
|
if(result)
|
|
return result;
|
|
|
|
conn->httpversion = 20; /* we know we're on HTTP/2 now */
|
|
conn->bits.multiplex = TRUE; /* at least potentially multiplexed */
|
|
conn->bundle->multiuse = BUNDLE_MULTIPLEX;
|
|
Curl_multi_connchanged(data->multi);
|
|
|
|
if(cf->next) {
|
|
bool done;
|
|
return Curl_conn_cf_connect(cf, data, FALSE, &done);
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_http2_switch_at(struct Curl_cfilter *cf, struct Curl_easy *data)
|
|
{
|
|
struct Curl_cfilter *cf_h2;
|
|
CURLcode result;
|
|
|
|
DEBUGASSERT(!Curl_cf_is_http2(cf, data));
|
|
|
|
result = http2_cfilter_insert_after(cf, data, FALSE);
|
|
if(result)
|
|
return result;
|
|
|
|
cf_h2 = cf->next;
|
|
cf->conn->httpversion = 20; /* we know we're on HTTP/2 now */
|
|
cf->conn->bits.multiplex = TRUE; /* at least potentially multiplexed */
|
|
cf->conn->bundle->multiuse = BUNDLE_MULTIPLEX;
|
|
Curl_multi_connchanged(data->multi);
|
|
|
|
if(cf_h2->next) {
|
|
bool done;
|
|
return Curl_conn_cf_connect(cf_h2, data, FALSE, &done);
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_http2_upgrade(struct Curl_easy *data,
|
|
struct connectdata *conn, int sockindex,
|
|
const char *mem, size_t nread)
|
|
{
|
|
struct Curl_cfilter *cf;
|
|
struct cf_h2_ctx *ctx;
|
|
CURLcode result;
|
|
|
|
DEBUGASSERT(!Curl_conn_is_http2(data, conn, sockindex));
|
|
DEBUGF(infof(data, "upgrading to HTTP/2"));
|
|
DEBUGASSERT(data->req.upgr101 == UPGR101_RECEIVED);
|
|
|
|
result = http2_cfilter_add(&cf, data, conn, sockindex, TRUE);
|
|
if(result)
|
|
return result;
|
|
|
|
DEBUGASSERT(cf->cft == &Curl_cft_nghttp2);
|
|
ctx = cf->ctx;
|
|
|
|
if(nread > 0) {
|
|
/* Remaining data from the protocol switch reply is already using
|
|
* the switched protocol, ie. HTTP/2. We add that to the network
|
|
* inbufq. */
|
|
ssize_t copied;
|
|
|
|
copied = Curl_bufq_write(&ctx->inbufq,
|
|
(const unsigned char *)mem, nread, &result);
|
|
if(copied < 0) {
|
|
failf(data, "error on copying HTTP Upgrade response: %d", result);
|
|
return CURLE_RECV_ERROR;
|
|
}
|
|
if((size_t)copied < nread) {
|
|
failf(data, "connection buffer size could not take all data "
|
|
"from HTTP Upgrade response header: copied=%zd, datalen=%zu",
|
|
copied, nread);
|
|
return CURLE_HTTP2;
|
|
}
|
|
infof(data, "Copied HTTP/2 data in stream buffer to connection buffer"
|
|
" after upgrade: len=%zu", nread);
|
|
}
|
|
|
|
conn->httpversion = 20; /* we know we're on HTTP/2 now */
|
|
conn->bits.multiplex = TRUE; /* at least potentially multiplexed */
|
|
conn->bundle->multiuse = BUNDLE_MULTIPLEX;
|
|
Curl_multi_connchanged(data->multi);
|
|
|
|
if(cf->next) {
|
|
bool done;
|
|
return Curl_conn_cf_connect(cf, data, FALSE, &done);
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* Only call this function for a transfer that already got an HTTP/2
|
|
CURLE_HTTP2_STREAM error! */
|
|
bool Curl_h2_http_1_1_error(struct Curl_easy *data)
|
|
{
|
|
if(Curl_conn_is_http2(data, data->conn, FIRSTSOCKET)) {
|
|
int err = Curl_conn_get_stream_error(data, data->conn, FIRSTSOCKET);
|
|
return (err == NGHTTP2_HTTP_1_1_REQUIRED);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
#else /* !USE_NGHTTP2 */
|
|
|
|
/* Satisfy external references even if http2 is not compiled in. */
|
|
#include <curl/curl.h>
|
|
|
|
char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num)
|
|
{
|
|
(void) h;
|
|
(void) num;
|
|
return NULL;
|
|
}
|
|
|
|
char *curl_pushheader_byname(struct curl_pushheaders *h, const char *header)
|
|
{
|
|
(void) h;
|
|
(void) header;
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* USE_NGHTTP2 */
|