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-rw-r--r--libcurl/src/lib/http2.c1077
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diff --git a/libcurl/src/lib/http2.c b/libcurl/src/lib/http2.c
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+++ b/libcurl/src/lib/http2.c
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+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef USE_NGHTTP2
+#include "curl_printf.h"
+#include <nghttp2/nghttp2.h>
+#include "urldata.h"
+#include "http2.h"
+#include "http.h"
+#include "sendf.h"
+#include "curl_base64.h"
+#include "rawstr.h"
+#include "multiif.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+#if (NGHTTP2_VERSION_NUM < 0x000600)
+#error too old nghttp2 version, upgrade!
+#endif
+
+static int http2_perform_getsock(const struct connectdata *conn,
+ curl_socket_t *sock, /* points to
+ numsocks
+ number of
+ sockets */
+ int numsocks)
+{
+ const struct http_conn *httpc = &conn->proto.httpc;
+ int bitmap = GETSOCK_BLANK;
+ (void)numsocks;
+
+ /* TODO We should check underlying socket state if it is SSL socket
+ because of renegotiation. */
+ sock[0] = conn->sock[FIRSTSOCKET];
+
+ if(nghttp2_session_want_read(httpc->h2))
+ bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
+
+ if(nghttp2_session_want_write(httpc->h2))
+ bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
+
+ return bitmap;
+}
+
+static int http2_getsock(struct connectdata *conn,
+ curl_socket_t *sock, /* points to numsocks
+ number of sockets */
+ int numsocks)
+{
+ return http2_perform_getsock(conn, sock, numsocks);
+}
+
+static CURLcode http2_disconnect(struct connectdata *conn,
+ bool dead_connection)
+{
+ struct http_conn *httpc = &conn->proto.httpc;
+ (void)dead_connection;
+
+ DEBUGF(infof(conn->data, "HTTP/2 DISCONNECT starts now\n"));
+
+ nghttp2_session_del(httpc->h2);
+
+ Curl_safefree(httpc->header_recvbuf->buffer);
+ Curl_safefree(httpc->header_recvbuf);
+
+ Curl_safefree(httpc->inbuf);
+
+ DEBUGF(infof(conn->data, "HTTP/2 DISCONNECT done\n"));
+
+ return CURLE_OK;
+}
+
+/*
+ * HTTP2 handler interface. This isn't added to the general list of protocols
+ * but will be used at run-time when the protocol is dynamically switched from
+ * HTTP to HTTP2.
+ */
+const struct Curl_handler Curl_handler_http2 = {
+ "HTTP2", /* scheme */
+ ZERO_NULL, /* setup_connection */
+ Curl_http, /* do_it */
+ Curl_http_done, /* done */
+ ZERO_NULL, /* do_more */
+ ZERO_NULL, /* connect_it */
+ ZERO_NULL, /* connecting */
+ ZERO_NULL, /* doing */
+ http2_getsock, /* proto_getsock */
+ http2_getsock, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ http2_perform_getsock, /* perform_getsock */
+ http2_disconnect, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_HTTP, /* defport */
+ CURLPROTO_HTTP, /* protocol */
+ PROTOPT_NONE /* flags */
+};
+
+const struct Curl_handler Curl_handler_http2_ssl = {
+ "HTTP2", /* scheme */
+ ZERO_NULL, /* setup_connection */
+ Curl_http, /* do_it */
+ Curl_http_done, /* done */
+ ZERO_NULL, /* do_more */
+ ZERO_NULL, /* connect_it */
+ ZERO_NULL, /* connecting */
+ ZERO_NULL, /* doing */
+ http2_getsock, /* proto_getsock */
+ http2_getsock, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ http2_perform_getsock, /* perform_getsock */
+ http2_disconnect, /* disconnect */
+ ZERO_NULL, /* readwrite */
+ PORT_HTTP, /* defport */
+ CURLPROTO_HTTPS, /* protocol */
+ PROTOPT_SSL /* flags */
+};
+
+/*
+ * Store nghttp2 version info in this buffer, Prefix with a space. Return
+ * total length written.
+ */
+CURL_STATIC int Curl_http2_ver(char *p, size_t len)
+{
+ nghttp2_info *h2 = nghttp2_version(0);
+ return snprintf(p, len, " nghttp2/%s", h2->version_str);
+}
+
+/*
+ * 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 *data, size_t length, int flags,
+ void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ struct http_conn *httpc = &conn->proto.httpc;
+ ssize_t written;
+ CURLcode result = CURLE_OK;
+
+ (void)h2;
+ (void)flags;
+
+ written = ((Curl_send*)httpc->send_underlying)(conn, FIRSTSOCKET,
+ data, length, &result);
+
+ if(result == CURLE_AGAIN) {
+ return NGHTTP2_ERR_WOULDBLOCK;
+ }
+
+ if(written == -1) {
+ failf(conn->data, "Failed sending HTTP2 data");
+ return NGHTTP2_ERR_CALLBACK_FAILURE;
+ }
+
+ if(!written)
+ return NGHTTP2_ERR_WOULDBLOCK;
+
+ return written;
+}
+
+static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
+ void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ struct http_conn *c = &conn->proto.httpc;
+ int rv;
+ size_t left, ncopy;
+
+ (void)session;
+ (void)frame;
+ DEBUGF(infof(conn->data, "on_frame_recv() was called with header %x\n",
+ frame->hd.type));
+ switch(frame->hd.type) {
+ case NGHTTP2_DATA:
+ /* If body started, then receiving DATA is illegal. */
+ if(!c->bodystarted) {
+ rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
+ frame->hd.stream_id,
+ NGHTTP2_PROTOCOL_ERROR);
+
+ if(nghttp2_is_fatal(rv)) {
+ return NGHTTP2_ERR_CALLBACK_FAILURE;
+ }
+ }
+ break;
+ case NGHTTP2_HEADERS:
+ if(frame->headers.cat == NGHTTP2_HCAT_REQUEST)
+ break;
+
+ if(c->bodystarted) {
+ /* Only valid HEADERS after body started is trailer header,
+ which is not fully supported in this code. If HEADERS is not
+ trailer, then it is a PROTOCOL_ERROR. */
+ if((frame->hd.flags & NGHTTP2_FLAG_END_STREAM) == 0) {
+ rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
+ frame->hd.stream_id,
+ NGHTTP2_PROTOCOL_ERROR);
+
+ if(nghttp2_is_fatal(rv)) {
+ return NGHTTP2_ERR_CALLBACK_FAILURE;
+ }
+ }
+ break;
+ }
+
+ if(c->status_code == -1) {
+ /* No :status header field means PROTOCOL_ERROR. */
+ rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
+ frame->hd.stream_id,
+ NGHTTP2_PROTOCOL_ERROR);
+
+ if(nghttp2_is_fatal(rv)) {
+ return NGHTTP2_ERR_CALLBACK_FAILURE;
+ }
+
+ break;
+ }
+
+ /* Only final status code signals the end of header */
+ if(c->status_code / 100 != 1) {
+ c->bodystarted = TRUE;
+ }
+
+ c->status_code = -1;
+
+ Curl_add_buffer(c->header_recvbuf, "\r\n", 2);
+
+ left = c->header_recvbuf->size_used - c->nread_header_recvbuf;
+ ncopy = c->len < left ? c->len : left;
+
+ memcpy(c->mem, c->header_recvbuf->buffer + c->nread_header_recvbuf, ncopy);
+ c->nread_header_recvbuf += ncopy;
+
+ c->mem += ncopy;
+ c->len -= ncopy;
+ break;
+ case NGHTTP2_PUSH_PROMISE:
+ rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
+ frame->push_promise.promised_stream_id,
+ NGHTTP2_CANCEL);
+ if(nghttp2_is_fatal(rv)) {
+ return rv;
+ }
+ break;
+ }
+ return 0;
+}
+
+static int on_invalid_frame_recv(nghttp2_session *session,
+ const nghttp2_frame *frame,
+ uint32_t error_code, void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ (void)session;
+ (void)frame;
+ DEBUGF(infof(conn->data,
+ "on_invalid_frame_recv() was called, error_code = %d\n",
+ error_code));
+ return 0;
+}
+
+static int on_data_chunk_recv(nghttp2_session *session, uint8_t flags,
+ int32_t stream_id,
+ const uint8_t *data, size_t len, void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ struct http_conn *c = &conn->proto.httpc;
+ size_t nread;
+ (void)session;
+ (void)flags;
+ (void)data;
+ DEBUGF(infof(conn->data, "on_data_chunk_recv() "
+ "len = %u, stream = %x\n", len, stream_id));
+
+ if(stream_id != c->stream_id) {
+ return 0;
+ }
+
+ nread = c->len < len ? c->len : len;
+ memcpy(c->mem, data, nread);
+
+ c->mem += nread;
+ c->len -= nread;
+
+ DEBUGF(infof(conn->data, "%zu data written\n", nread));
+
+ if(nread < len) {
+ c->data = data + nread;
+ c->datalen = len - nread;
+ return NGHTTP2_ERR_PAUSE;
+ }
+ return 0;
+}
+
+static int before_frame_send(nghttp2_session *session,
+ const nghttp2_frame *frame,
+ void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ (void)session;
+ (void)frame;
+ DEBUGF(infof(conn->data, "before_frame_send() was called\n"));
+ return 0;
+}
+static int on_frame_send(nghttp2_session *session,
+ const nghttp2_frame *frame,
+ void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ (void)session;
+ (void)frame;
+ DEBUGF(infof(conn->data, "on_frame_send() was called\n"));
+ return 0;
+}
+static int on_frame_not_send(nghttp2_session *session,
+ const nghttp2_frame *frame,
+ int lib_error_code, void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ (void)session;
+ (void)frame;
+ DEBUGF(infof(conn->data,
+ "on_frame_not_send() was called, lib_error_code = %d\n",
+ lib_error_code));
+ return 0;
+}
+static int on_stream_close(nghttp2_session *session, int32_t stream_id,
+ uint32_t error_code, void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ struct http_conn *c = &conn->proto.httpc;
+ (void)session;
+ (void)stream_id;
+ DEBUGF(infof(conn->data, "on_stream_close() was called, error_code = %d\n",
+ error_code));
+
+ if(stream_id != c->stream_id) {
+ return 0;
+ }
+
+ c->error_code = error_code;
+ c->closed = TRUE;
+
+ return 0;
+}
+
+static int on_begin_headers(nghttp2_session *session,
+ const nghttp2_frame *frame, void *userp)
+{
+ struct connectdata *conn = (struct connectdata *)userp;
+ (void)session;
+ (void)frame;
+ DEBUGF(infof(conn->data, "on_begin_headers() was called\n"));
+ return 0;
+}
+
+/* Decode HTTP status code. Returns -1 if no valid status code was
+ decoded. */
+static int decode_status_code(const uint8_t *value, size_t len)
+{
+ int i;
+ int res;
+
+ if(len != 3) {
+ return -1;
+ }
+
+ res = 0;
+
+ for(i = 0; i < 3; ++i) {
+ char c = value[i];
+
+ if(c < '0' || c > '9') {
+ return -1;
+ }
+
+ res *= 10;
+ res += c - '0';
+ }
+
+ return res;
+}
+
+static const char STATUS[] = ":status";
+
+/* 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 connectdata *conn = (struct connectdata *)userp;
+ struct http_conn *c = &conn->proto.httpc;
+ int rv;
+ int goodname;
+ int goodheader;
+
+ (void)session;
+ (void)frame;
+ (void)flags;
+
+ /* Ignore PUSH_PROMISE for now */
+ if(frame->hd.type != NGHTTP2_HEADERS) {
+ return 0;
+ }
+
+ if(frame->hd.stream_id != c->stream_id) {
+ return 0;
+ }
+
+ if(c->bodystarted) {
+ /* Ignore trailer or HEADERS not mapped to HTTP semantics. The
+ consequence is handled in on_frame_recv(). */
+ return 0;
+ }
+
+ goodname = nghttp2_check_header_name(name, namelen);
+ goodheader = nghttp2_check_header_value(value, valuelen);
+
+ if(!goodname || !goodheader) {
+
+ infof(conn->data, "Detected bad incoming header %s%s, reset stream!\n",
+ goodname?"":"name",
+ goodheader?"":"value");
+
+ rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
+ frame->hd.stream_id,
+ NGHTTP2_PROTOCOL_ERROR);
+
+ if(nghttp2_is_fatal(rv)) {
+ return NGHTTP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+ }
+
+ if(namelen == sizeof(":status") - 1 &&
+ memcmp(STATUS, name, namelen) == 0) {
+
+ /* :status must appear exactly once. */
+ if(c->status_code != -1 ||
+ (c->status_code = decode_status_code(value, valuelen)) == -1) {
+
+ rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
+ frame->hd.stream_id,
+ NGHTTP2_PROTOCOL_ERROR);
+ if(nghttp2_is_fatal(rv)) {
+ return NGHTTP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+ }
+
+ Curl_add_buffer(c->header_recvbuf, "HTTP/2.0 ", 9);
+ Curl_add_buffer(c->header_recvbuf, value, valuelen);
+ Curl_add_buffer(c->header_recvbuf, "\r\n", 2);
+
+ return 0;
+ }
+ else {
+ /* Here we are sure that namelen > 0 because of
+ nghttp2_check_header_name(). Pseudo header other than :status
+ is illegal. */
+ if(c->status_code == -1 || name[0] == ':') {
+ rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
+ frame->hd.stream_id,
+ NGHTTP2_PROTOCOL_ERROR);
+ if(nghttp2_is_fatal(rv)) {
+ return NGHTTP2_ERR_CALLBACK_FAILURE;
+ }
+
+ return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
+ }
+
+ /* convert to a HTTP1-style header */
+ Curl_add_buffer(c->header_recvbuf, name, namelen);
+ Curl_add_buffer(c->header_recvbuf, ":", 1);
+ Curl_add_buffer(c->header_recvbuf, value, valuelen);
+ Curl_add_buffer(c->header_recvbuf, "\r\n", 2);
+
+ DEBUGF(infof(conn->data, "h2 header: %.*s: %.*s\n",
+ namelen, name, valuelen, value));
+ }
+
+ return 0; /* 0 is successful */
+}
+
+static ssize_t data_source_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 connectdata *conn = (struct connectdata *)userp;
+ struct http_conn *c = &conn->proto.httpc;
+ size_t nread;
+ (void)session;
+ (void)stream_id;
+ (void)source;
+
+ nread = c->upload_len < length ? c->upload_len : length;
+ if(nread > 0) {
+ memcpy(buf, c->upload_mem, nread);
+ c->upload_mem += nread;
+ c->upload_len -= nread;
+ c->upload_left -= nread;
+ }
+
+ if(c->upload_left == 0)
+ *data_flags = 1;
+ else if(nread == 0)
+ return NGHTTP2_ERR_DEFERRED;
+
+ return nread;
+}
+
+/*
+ * The HTTP2 settings we send in the Upgrade request
+ */
+static nghttp2_settings_entry settings[] = {
+ { NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100 },
+ { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, NGHTTP2_INITIAL_WINDOW_SIZE },
+};
+
+#define H2_BUFSIZE 4096
+
+/*
+ * Initialize nghttp2 for a Curl connection
+ */
+CURL_STATIC CURLcode Curl_http2_init(struct connectdata *conn)
+{
+ if(!conn->proto.httpc.h2) {
+ int rc;
+ nghttp2_session_callbacks *callbacks;
+
+ conn->proto.httpc.inbuf = malloc(H2_BUFSIZE);
+ if(conn->proto.httpc.inbuf == NULL)
+ return CURLE_OUT_OF_MEMORY;
+
+ rc = nghttp2_session_callbacks_new(&callbacks);
+
+ if(rc) {
+ failf(conn->data, "Couldn't initialize nghttp2 callbacks!");
+ return CURLE_OUT_OF_MEMORY; /* most likely at least */
+ }
+
+ /* nghttp2_send_callback */
+ nghttp2_session_callbacks_set_send_callback(callbacks, send_callback);
+ /* nghttp2_on_frame_recv_callback */
+ nghttp2_session_callbacks_set_on_frame_recv_callback
+ (callbacks, on_frame_recv);
+ /* nghttp2_on_invalid_frame_recv_callback */
+ nghttp2_session_callbacks_set_on_invalid_frame_recv_callback
+ (callbacks, on_invalid_frame_recv);
+ /* nghttp2_on_data_chunk_recv_callback */
+ nghttp2_session_callbacks_set_on_data_chunk_recv_callback
+ (callbacks, on_data_chunk_recv);
+ /* nghttp2_before_frame_send_callback */
+ nghttp2_session_callbacks_set_before_frame_send_callback
+ (callbacks, before_frame_send);
+ /* nghttp2_on_frame_send_callback */
+ nghttp2_session_callbacks_set_on_frame_send_callback
+ (callbacks, on_frame_send);
+ /* nghttp2_on_frame_not_send_callback */
+ nghttp2_session_callbacks_set_on_frame_not_send_callback
+ (callbacks, on_frame_not_send);
+ /* nghttp2_on_stream_close_callback */
+ nghttp2_session_callbacks_set_on_stream_close_callback
+ (callbacks, on_stream_close);
+ /* nghttp2_on_begin_headers_callback */
+ nghttp2_session_callbacks_set_on_begin_headers_callback
+ (callbacks, on_begin_headers);
+ /* nghttp2_on_header_callback */
+ nghttp2_session_callbacks_set_on_header_callback(callbacks, on_header);
+
+ /* The nghttp2 session is not yet setup, do it */
+ rc = nghttp2_session_client_new(&conn->proto.httpc.h2,
+ callbacks, conn);
+
+ nghttp2_session_callbacks_del(callbacks);
+
+ if(rc) {
+ failf(conn->data, "Couldn't initialize nghttp2!");
+ return CURLE_OUT_OF_MEMORY; /* most likely at least */
+ }
+ }
+ return CURLE_OK;
+}
+
+/*
+ * Send a request using http2
+ */
+CURL_STATIC CURLcode Curl_http2_send_request(struct connectdata *conn)
+{
+ (void)conn;
+ return CURLE_OK;
+}
+
+/*
+ * Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
+ */
+CURL_STATIC CURLcode Curl_http2_request_upgrade(Curl_send_buffer *req,
+ struct connectdata *conn)
+{
+ CURLcode result;
+ ssize_t binlen;
+ char *base64;
+ size_t blen;
+ struct SingleRequest *k = &conn->data->req;
+ uint8_t *binsettings = conn->proto.httpc.binsettings;
+
+ /* As long as we have a fixed set of settings, we don't have to dynamically
+ * figure out the base64 strings since it'll always be the same. However,
+ * the settings will likely not be fixed every time in the future.
+ */
+
+ /* this returns number of bytes it wrote */
+ binlen = nghttp2_pack_settings_payload(binsettings, H2_BINSETTINGS_LEN,
+ settings,
+ sizeof(settings)/sizeof(settings[0]));
+ if(!binlen) {
+ failf(conn->data, "nghttp2 unexpectedly failed on pack_settings_payload");
+ return CURLE_FAILED_INIT;
+ }
+ conn->proto.httpc.binlen = binlen;
+
+ result = Curl_base64url_encode(conn->data, (const char *)binsettings, binlen,
+ &base64, &blen);
+ if(result)
+ return result;
+
+ result = Curl_add_bufferf(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_REQUESTED;
+
+ return result;
+}
+
+/*
+ * If the read would block (EWOULDBLOCK) we return -1. Otherwise we return
+ * a regular CURLcode value.
+ */
+static ssize_t http2_recv(struct connectdata *conn, int sockindex,
+ char *mem, size_t len, CURLcode *err)
+{
+ CURLcode result = CURLE_OK;
+ ssize_t rv;
+ ssize_t nread;
+ struct http_conn *httpc = &conn->proto.httpc;
+
+ (void)sockindex; /* we always do HTTP2 on sockindex 0 */
+
+ if(httpc->closed) {
+ /* Reset to FALSE to prevent infinite loop in readwrite_data
+ function. */
+ httpc->closed = FALSE;
+ return 0;
+ }
+
+ /* Nullify here because we call nghttp2_session_send() and they
+ might refer to the old buffer. */
+ httpc->upload_mem = NULL;
+ httpc->upload_len = 0;
+
+ if(httpc->bodystarted &&
+ httpc->nread_header_recvbuf < httpc->header_recvbuf->size_used) {
+ size_t left =
+ httpc->header_recvbuf->size_used - httpc->nread_header_recvbuf;
+ size_t ncopy = len < left ? len : left;
+ memcpy(mem, httpc->header_recvbuf->buffer + httpc->nread_header_recvbuf,
+ ncopy);
+ httpc->nread_header_recvbuf += ncopy;
+ return ncopy;
+ }
+
+ if(httpc->data) {
+ nread = len < httpc->datalen ? len : httpc->datalen;
+ memcpy(mem, httpc->data, nread);
+
+ httpc->data += nread;
+ httpc->datalen -= nread;
+
+ infof(conn->data, "%zu data bytes written\n", nread);
+ if(httpc->datalen == 0) {
+ httpc->data = NULL;
+ httpc->datalen = 0;
+ }
+ return nread;
+ }
+
+ conn->proto.httpc.mem = mem;
+ conn->proto.httpc.len = len;
+
+ infof(conn->data, "http2_recv: %d bytes buffer\n",
+ conn->proto.httpc.len);
+
+ nread = ((Curl_recv*)httpc->recv_underlying)(conn, FIRSTSOCKET,
+ httpc->inbuf, H2_BUFSIZE,
+ &result);
+ if(result == CURLE_AGAIN) {
+ *err = result;
+ return -1;
+ }
+
+ if(nread == -1) {
+ failf(conn->data, "Failed receiving HTTP2 data");
+ *err = result;
+ return 0;
+ }
+
+ if(nread == 0) {
+ failf(conn->data, "Unexpected EOF");
+ *err = CURLE_RECV_ERROR;
+ return -1;
+ }
+
+ DEBUGF(infof(conn->data, "nread=%zd\n", nread));
+
+ rv = nghttp2_session_mem_recv(httpc->h2,
+ (const uint8_t *)httpc->inbuf, nread);
+
+ if(nghttp2_is_fatal((int)rv)) {
+ failf(conn->data, "nghttp2_session_mem_recv() returned %d:%s\n",
+ rv, nghttp2_strerror((int)rv));
+ *err = CURLE_RECV_ERROR;
+ return 0;
+ }
+ DEBUGF(infof(conn->data, "nghttp2_session_mem_recv() returns %zd\n", rv));
+ /* Always send pending frames in nghttp2 session, because
+ nghttp2_session_mem_recv() may queue new frame */
+ rv = nghttp2_session_send(httpc->h2);
+ if(rv != 0) {
+ *err = CURLE_SEND_ERROR;
+ return 0;
+ }
+ if(len != httpc->len) {
+ return len - conn->proto.httpc.len;
+ }
+ /* If stream is closed, return 0 to signal the http routine to close
+ the connection */
+ if(httpc->closed) {
+ /* Reset to FALSE to prevent infinite loop in readwrite_data
+ function. */
+ httpc->closed = FALSE;
+ if(httpc->error_code != NGHTTP2_NO_ERROR) {
+ failf(conn->data,
+ "HTTP/2 stream = %x was not closed cleanly: error_code = %d",
+ httpc->stream_id, httpc->error_code);
+ *err = CURLE_HTTP2;
+ return -1;
+ }
+ return 0;
+ }
+ *err = CURLE_AGAIN;
+ return -1;
+}
+
+/* Index where :authority header field will appear in request header
+ field list. */
+#define AUTHORITY_DST_IDX 3
+
+/* return number of received (decrypted) bytes */
+static ssize_t http2_send(struct connectdata *conn, int sockindex,
+ const void *mem, size_t len, CURLcode *err)
+{
+ /*
+ * BIG TODO: Currently, we send request in this function, but this
+ * function is also used to send request body. It would be nice to
+ * add dedicated function for request.
+ */
+ int rv;
+ struct http_conn *httpc = &conn->proto.httpc;
+ nghttp2_nv *nva;
+ size_t nheader;
+ size_t i;
+ size_t authority_idx;
+ char *hdbuf = (char*)mem;
+ char *end;
+ nghttp2_data_provider data_prd;
+ int32_t stream_id;
+
+ (void)sockindex;
+
+ DEBUGF(infof(conn->data, "http2_send len=%zu\n", len));
+
+ if(httpc->stream_id != -1) {
+ /* If stream_id != -1, we have dispatched request HEADERS, and now
+ are going to send or sending request body in DATA frame */
+ httpc->upload_mem = mem;
+ httpc->upload_len = len;
+ nghttp2_session_resume_data(httpc->h2, httpc->stream_id);
+ rv = nghttp2_session_send(httpc->h2);
+ if(nghttp2_is_fatal(rv)) {
+ *err = CURLE_SEND_ERROR;
+ return -1;
+ }
+ return len - httpc->upload_len;
+ }
+
+ /* Calculate number of headers contained in [mem, mem + len) */
+ /* Here, we assume the curl http code generate *correct* HTTP header
+ field block */
+ nheader = 0;
+ for(i = 0; i < len; ++i) {
+ if(hdbuf[i] == 0x0a) {
+ ++nheader;
+ }
+ }
+ /* We counted additional 2 \n in the first and last line. We need 3
+ new headers: :method, :path and :scheme. Therefore we need one
+ more space. */
+ nheader += 1;
+ nva = malloc(sizeof(nghttp2_nv) * nheader);
+ if(nva == NULL) {
+ *err = CURLE_OUT_OF_MEMORY;
+ return -1;
+ }
+ /* Extract :method, :path from request line */
+ end = strchr(hdbuf, ' ');
+ nva[0].name = (unsigned char *)":method";
+ nva[0].namelen = (uint16_t)strlen((char *)nva[0].name);
+ nva[0].value = (unsigned char *)hdbuf;
+ nva[0].valuelen = (uint16_t)(end - hdbuf);
+ nva[0].flags = NGHTTP2_NV_FLAG_NONE;
+
+ hdbuf = end + 1;
+
+ end = strchr(hdbuf, ' ');
+ nva[1].name = (unsigned char *)":path";
+ nva[1].namelen = (uint16_t)strlen((char *)nva[1].name);
+ nva[1].value = (unsigned char *)hdbuf;
+ nva[1].valuelen = (uint16_t)(end - hdbuf);
+ nva[1].flags = NGHTTP2_NV_FLAG_NONE;
+
+ nva[2].name = (unsigned char *)":scheme";
+ nva[2].namelen = (uint16_t)strlen((char *)nva[2].name);
+ if(conn->handler->flags & PROTOPT_SSL)
+ nva[2].value = (unsigned char *)"https";
+ else
+ nva[2].value = (unsigned char *)"http";
+ nva[2].valuelen = (uint16_t)strlen((char *)nva[2].value);
+ nva[2].flags = NGHTTP2_NV_FLAG_NONE;
+
+ hdbuf = strchr(hdbuf, 0x0a);
+ ++hdbuf;
+
+ authority_idx = 0;
+
+ for(i = 3; i < nheader; ++i) {
+ end = strchr(hdbuf, ':');
+ assert(end);
+ if(end - hdbuf == 4 && Curl_raw_nequal("host", hdbuf, 4)) {
+ authority_idx = i;
+ nva[i].name = (unsigned char *)":authority";
+ nva[i].namelen = (uint16_t)strlen((char *)nva[i].name);
+ }
+ else {
+ nva[i].name = (unsigned char *)hdbuf;
+ nva[i].namelen = (uint16_t)(end - hdbuf);
+ }
+ hdbuf = end + 1;
+ for(; *hdbuf == ' '; ++hdbuf);
+ end = strchr(hdbuf, 0x0d);
+ assert(end);
+ nva[i].value = (unsigned char *)hdbuf;
+ nva[i].valuelen = (uint16_t)(end - hdbuf);
+ nva[i].flags = NGHTTP2_NV_FLAG_NONE;
+
+ hdbuf = end + 2;
+ /* Inspect Content-Length header field and retrieve the request
+ entity length so that we can set END_STREAM to the last DATA
+ frame. */
+ if(nva[i].namelen == 14 &&
+ Curl_raw_nequal("content-length", (char*)nva[i].name, 14)) {
+ size_t j;
+ for(j = 0; j < nva[i].valuelen; ++j) {
+ httpc->upload_left *= 10;
+ httpc->upload_left += nva[i].value[j] - '0';
+ }
+ DEBUGF(infof(conn->data,
+ "request content-length=%zu\n", httpc->upload_left));
+ }
+ }
+
+ /* :authority must come before non-pseudo header fields */
+ if(authority_idx != 0 && authority_idx != AUTHORITY_DST_IDX) {
+ nghttp2_nv authority = nva[authority_idx];
+ for(i = authority_idx; i > AUTHORITY_DST_IDX; --i) {
+ nva[i] = nva[i - 1];
+ }
+ nva[i] = authority;
+ }
+
+ switch(conn->data->set.httpreq) {
+ case HTTPREQ_POST:
+ case HTTPREQ_POST_FORM:
+ case HTTPREQ_PUT:
+ data_prd.read_callback = data_source_read_callback;
+ data_prd.source.ptr = NULL;
+ stream_id = nghttp2_submit_request(httpc->h2, NULL, nva, nheader,
+ &data_prd, NULL);
+ break;
+ default:
+ stream_id = nghttp2_submit_request(httpc->h2, NULL, nva, nheader,
+ NULL, NULL);
+ }
+
+ free(nva);
+
+ if(stream_id < 0) {
+ *err = CURLE_SEND_ERROR;
+ return -1;
+ }
+
+ httpc->stream_id = stream_id;
+
+ rv = nghttp2_session_send(httpc->h2);
+
+ if(rv != 0) {
+ *err = CURLE_SEND_ERROR;
+ return -1;
+ }
+
+ if(httpc->stream_id != -1) {
+ /* If whole HEADERS frame was sent off to the underlying socket,
+ the nghttp2 library calls data_source_read_callback. But only
+ it found that no data available, so it deferred the DATA
+ transmission. Which means that nghttp2_session_want_write()
+ returns 0 on http2_perform_getsock(), which results that no
+ writable socket check is performed. To workaround this, we
+ issue nghttp2_session_resume_data() here to bring back DATA
+ transmission from deferred state. */
+ nghttp2_session_resume_data(httpc->h2, httpc->stream_id);
+ }
+
+ return len;
+}
+
+CURL_STATIC CURLcode Curl_http2_setup(struct connectdata *conn)
+{
+ CURLcode result;
+ struct http_conn *httpc = &conn->proto.httpc;
+ if(conn->handler->flags & PROTOPT_SSL)
+ conn->handler = &Curl_handler_http2_ssl;
+ else
+ conn->handler = &Curl_handler_http2;
+
+ result = Curl_http2_init(conn);
+ if(result)
+ return result;
+
+ infof(conn->data, "Using HTTP2\n");
+ httpc->bodystarted = FALSE;
+ httpc->error_code = NGHTTP2_NO_ERROR;
+ httpc->closed = FALSE;
+ httpc->header_recvbuf = Curl_add_buffer_init();
+ httpc->nread_header_recvbuf = 0;
+ httpc->data = NULL;
+ httpc->datalen = 0;
+ httpc->upload_left = 0;
+ httpc->upload_mem = NULL;
+ httpc->upload_len = 0;
+ httpc->stream_id = -1;
+ httpc->status_code = -1;
+
+ conn->httpversion = 20;
+
+ return CURLE_OK;
+}
+
+CURL_STATIC CURLcode Curl_http2_switched(struct connectdata *conn,
+ const char *mem, size_t nread)
+{
+ CURLcode result;
+ struct http_conn *httpc = &conn->proto.httpc;
+ int rv;
+ struct SessionHandle *data = conn->data;
+
+ result = Curl_http2_setup(conn);
+ if(result)
+ return result;
+
+ httpc->recv_underlying = (recving)conn->recv[FIRSTSOCKET];
+ httpc->send_underlying = (sending)conn->send[FIRSTSOCKET];
+ conn->recv[FIRSTSOCKET] = http2_recv;
+ conn->send[FIRSTSOCKET] = http2_send;
+
+ rv = (int) ((Curl_send*)httpc->send_underlying)
+ (conn, FIRSTSOCKET,
+ NGHTTP2_CLIENT_CONNECTION_PREFACE,
+ NGHTTP2_CLIENT_CONNECTION_PREFACE_LEN,
+ &result);
+ if(result)
+ /* TODO: This may get CURLE_AGAIN */
+ return result;
+
+ if(rv != 24) {
+ failf(data, "Only sent partial HTTP2 packet");
+ return CURLE_SEND_ERROR;
+ }
+
+ if(conn->data->req.upgr101 == UPGR101_RECEIVED) {
+ /* stream 1 is opened implicitly on upgrade */
+ httpc->stream_id = 1;
+ /* queue SETTINGS frame (again) */
+ rv = nghttp2_session_upgrade(httpc->h2, httpc->binsettings,
+ httpc->binlen, NULL);
+ if(rv != 0) {
+ failf(data, "nghttp2_session_upgrade() failed: %s(%d)",
+ nghttp2_strerror(rv), rv);
+ return CURLE_HTTP2;
+ }
+ }
+ else {
+ /* stream ID is unknown at this point */
+ httpc->stream_id = -1;
+ rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE, NULL, 0);
+ if(rv != 0) {
+ failf(data, "nghttp2_submit_settings() failed: %s(%d)",
+ nghttp2_strerror(rv), rv);
+ return CURLE_HTTP2;
+ }
+ }
+
+ rv = (int)nghttp2_session_mem_recv(httpc->h2, (const uint8_t*)mem, nread);
+
+ if(rv != (int)nread) {
+ failf(data, "nghttp2_session_mem_recv() failed: %s(%d)",
+ nghttp2_strerror(rv), rv);
+ return CURLE_HTTP2;
+ }
+
+ /* Try to send some frames since we may read SETTINGS already. */
+ rv = nghttp2_session_send(httpc->h2);
+
+ if(rv != 0) {
+ failf(data, "nghttp2_session_send() failed: %s(%d)",
+ nghttp2_strerror(rv), rv);
+ return CURLE_HTTP2;
+ }
+
+ return CURLE_OK;
+}
+
+#endif