1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 #include "curl_setup.h"
26 #define _MPRINTF_REPLACE
27 #include <curl/mprintf.h>
29 #include <nghttp2/nghttp2.h>
34 #include "curl_base64.h"
35 #include "curl_memory.h"
37 /* include memdebug.h last */
40 #if (NGHTTP2_VERSION_NUM < 0x000300)
41 #error too old nghttp2 version, upgrade!
45 * HTTP2 handler interface. This isn't added to the general list of protocols
46 * but will be used at run-time when the protocol is dynamically switched from
49 const struct Curl_handler Curl_handler_http2 = {
51 ZERO_NULL, /* setup_connection */
52 ZERO_NULL, /* do_it */
53 ZERO_NULL , /* done */
54 ZERO_NULL, /* do_more */
55 ZERO_NULL, /* connect_it */
56 ZERO_NULL, /* connecting */
57 ZERO_NULL, /* doing */
58 ZERO_NULL, /* proto_getsock */
59 ZERO_NULL, /* doing_getsock */
60 ZERO_NULL, /* domore_getsock */
61 ZERO_NULL, /* perform_getsock */
62 ZERO_NULL, /* disconnect */
63 ZERO_NULL, /* readwrite */
64 PORT_HTTP, /* defport */
66 PROTOPT_NONE /* flags */
71 * Store nghttp2 version info in this buffer, Prefix with a space. Return
72 * total length written.
74 int Curl_http2_ver(char *p, size_t len)
76 nghttp2_info *h2 = nghttp2_version(0);
77 return snprintf(p, len, " nghttp2/%s", h2->version_str);
81 * The implementation of nghttp2_send_callback type. Here we write |data| with
82 * size |length| to the network and return the number of bytes actually
83 * written. See the documentation of nghttp2_send_callback for the details.
85 static ssize_t send_callback(nghttp2_session *h2,
86 const uint8_t *data, size_t length, int flags,
89 struct connectdata *conn = (struct connectdata *)userp;
92 Curl_write(conn, conn->sock[0], data, length, &written);
97 failf(conn->data, "Failed sending HTTP2 data");
98 return NGHTTP2_ERR_CALLBACK_FAILURE;
101 return NGHTTP2_ERR_WOULDBLOCK;
107 * The implementation of nghttp2_recv_callback type. Here we read data from
108 * the network and write them in |buf|. The capacity of |buf| is |length|
109 * bytes. Returns the number of bytes stored in |buf|. See the documentation
110 * of nghttp2_recv_callback for the details.
112 static ssize_t recv_callback(nghttp2_session *h2,
113 uint8_t *buf, size_t length, int flags,
116 struct connectdata *conn = (struct connectdata *)userp;
118 CURLcode rc = Curl_read_plain(conn->sock[FIRSTSOCKET], (char *)buf, length,
124 failf(conn->data, "Failed receiving HTTP2 data");
125 return NGHTTP2_ERR_CALLBACK_FAILURE;
128 return NGHTTP2_ERR_WOULDBLOCK;
134 /* frame->hd.type is either NGHTTP2_HEADERS or NGHTTP2_PUSH_PROMISE */
135 static int got_header(nghttp2_session *session, const nghttp2_frame *frame,
136 const uint8_t *name, size_t namelen,
137 const uint8_t *value, size_t valuelen,
140 struct connectdata *conn = (struct connectdata *)userp;
144 if(namelen + valuelen < 200) {
146 memcpy(buffer, name, namelen);
148 memcpy(&buffer[namelen+1], value, valuelen);
149 buffer[namelen + valuelen + 1]=0;
150 infof(conn->data, "Got '%s'\n", buffer);
151 /* TODO: the headers need to be passed to the http parser */
154 infof(conn->data, "Got header with no name or too long\n",
155 namelen, name, valuelen, value);
158 return 0; /* 0 is successful */
162 * This is all callbacks nghttp2 calls
164 static const nghttp2_session_callbacks callbacks = {
165 send_callback, /* nghttp2_send_callback */
166 recv_callback, /* nghttp2_recv_callback */
167 NULL, /* nghttp2_on_frame_recv_callback */
168 NULL, /* nghttp2_on_invalid_frame_recv_callback */
169 NULL, /* nghttp2_on_data_chunk_recv_callback */
170 NULL, /* nghttp2_before_frame_send_callback */
171 NULL, /* nghttp2_on_frame_send_callback */
172 NULL, /* nghttp2_on_frame_not_send_callback */
173 NULL, /* nghttp2_on_stream_close_callback */
174 NULL, /* nghttp2_on_unknown_frame_recv_callback */
175 NULL, /* nghttp2_on_begin_headers_callback */
176 got_header /* nghttp2_on_header_callback */
180 * The HTTP2 settings we send in the Upgrade request
182 static nghttp2_settings_entry settings[] = {
183 { NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100 },
184 { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, NGHTTP2_INITIAL_WINDOW_SIZE },
188 * Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
190 CURLcode Curl_http2_request(Curl_send_buffer *req,
191 struct connectdata *conn)
193 uint8_t binsettings[80];
198 struct SingleRequest *k = &conn->data->req;
200 if(!conn->proto.httpc.h2) {
201 /* The nghttp2 session is not yet setup, do it */
202 int rc = nghttp2_session_client_new(&conn->proto.httpc.h2,
205 failf(conn->data, "Couldn't initialize nghttp2!");
206 return CURLE_OUT_OF_MEMORY; /* most likely at least */
210 /* As long as we have a fixed set of settings, we don't have to dynamically
211 * figure out the base64 strings since it'll always be the same. However,
212 * the settings will likely not be fixed every time in the future.
215 /* this returns number of bytes it wrote */
216 binlen = nghttp2_pack_settings_payload(binsettings,
219 sizeof(settings)/sizeof(settings[0]));
221 failf(conn->data, "nghttp2 unexpectedly failed on pack_settings_payload");
222 return CURLE_FAILED_INIT;
225 result = Curl_base64_encode(conn->data, (const char *)binsettings, binlen,
230 result = Curl_add_bufferf(req,
231 "Connection: Upgrade, HTTP2-Settings\r\n"
233 "HTTP2-Settings: %s\r\n",
234 NGHTTP2_PROTO_VERSION_ID, base64);
237 k->upgr101 = UPGR101_REQUESTED;
243 * If the read would block (EWOULDBLOCK) we return -1. Otherwise we return
244 * a regular CURLcode value.
246 static ssize_t http2_recv(struct connectdata *conn, int sockindex,
247 char *mem, size_t len, CURLcode *err)
250 (void)sockindex; /* we always do HTTP2 on sockindex 0 */
252 conn->proto.httpc.mem = mem;
253 conn->proto.httpc.size = len;
255 rc = nghttp2_session_recv(conn->proto.httpc.h2);
258 failf(conn->data, "nghttp2_session_recv() returned %d\n",
260 *err = CURLE_RECV_ERROR;
265 /* return number of received (decrypted) bytes */
266 static ssize_t http2_send(struct connectdata *conn, int sockindex,
267 const void *mem, size_t len, CURLcode *err)
269 /* TODO: proper implementation */
278 void Curl_http2_switched(struct connectdata *conn)
280 /* we are switched! */
281 conn->handler = &Curl_handler_http2;
282 conn->recv[FIRSTSOCKET] = http2_recv;
283 conn->send[FIRSTSOCKET] = http2_send;
284 infof(conn->data, "We have switched to HTTP2\n");