1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2013, 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 */
41 * HTTP2 handler interface. This isn't added to the general list of protocols
42 * but will be used at run-time when the protocol is dynamically switched from
45 const struct Curl_handler Curl_handler_http2 = {
47 ZERO_NULL, /* setup_connection */
48 ZERO_NULL, /* do_it */
49 ZERO_NULL , /* done */
50 ZERO_NULL, /* do_more */
51 ZERO_NULL, /* connect_it */
52 ZERO_NULL, /* connecting */
53 ZERO_NULL, /* doing */
54 ZERO_NULL, /* proto_getsock */
55 ZERO_NULL, /* doing_getsock */
56 ZERO_NULL, /* domore_getsock */
57 ZERO_NULL, /* perform_getsock */
58 ZERO_NULL, /* disconnect */
59 ZERO_NULL, /* readwrite */
60 PORT_HTTP, /* defport */
62 PROTOPT_NONE /* flags */
67 * Store nghttp2 version info in this buffer, Prefix with a space. Return
68 * total length written.
70 int Curl_http2_ver(char *p, size_t len)
72 nghttp2_info *h2 = nghttp2_version(0);
73 return snprintf(p, len, " nghttp2/%s", h2->version_str);
77 * The implementation of nghttp2_send_callback type. Here we write |data| with
78 * size |length| to the network and return the number of bytes actually
79 * written. See the documentation of nghttp2_send_callback for the details.
81 static ssize_t send_callback(nghttp2_session *h2,
82 const uint8_t *data, size_t length, int flags,
85 struct connectdata *conn = (struct connectdata *)userp;
88 Curl_write(conn, conn->sock[0], data, length, &written);
93 failf(conn->data, "Failed sending HTTP2 data");
94 return NGHTTP2_ERR_CALLBACK_FAILURE;
97 return NGHTTP2_ERR_WOULDBLOCK;
103 * The implementation of nghttp2_recv_callback type. Here we read data from
104 * the network and write them in |buf|. The capacity of |buf| is |length|
105 * bytes. Returns the number of bytes stored in |buf|. See the documentation
106 * of nghttp2_recv_callback for the details.
108 static ssize_t recv_callback(nghttp2_session *h2,
109 uint8_t *buf, size_t length, int flags,
112 struct connectdata *conn = (struct connectdata *)userp;
114 CURLcode rc = Curl_read_plain(conn->sock[0], (char *)buf, length, &nread);
119 failf(conn->data, "Failed recving HTTP2 data");
120 return NGHTTP2_ERR_CALLBACK_FAILURE;
123 return NGHTTP2_ERR_WOULDBLOCK;
129 * This is all callbacks nghttp2 calls
131 static const nghttp2_session_callbacks callbacks = {
149 * The HTTP2 settings we send in the Upgrade request
151 static nghttp2_settings_entry settings[] = {
152 { NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100 },
153 { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, NGHTTP2_INITIAL_WINDOW_SIZE },
157 * Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
159 CURLcode Curl_http2_request(Curl_send_buffer *req,
160 struct connectdata *conn)
162 uint8_t binsettings[80];
167 struct SingleRequest *k = &conn->data->req;
169 if(!conn->proto.httpc.h2) {
170 /* The nghttp2 session is not yet setup, do it */
171 int rc = nghttp2_session_client_new(&conn->proto.httpc.h2,
174 failf(conn->data, "Couldn't initialize nghttp2!");
175 return CURLE_OUT_OF_MEMORY; /* most likely at least */
179 /* As long as we have a fixed set of settings, we don't have to dynamically
180 * figure out the base64 strings since it'll always be the same. However,
181 * the settings will likely not be fixed every time in the future.
184 /* this returns number of bytes it wrote */
185 binlen = nghttp2_pack_settings_payload(binsettings,
188 sizeof(settings)/sizeof(settings[0]));
190 failf(conn->data, "nghttp2 unexpectedly failed on pack_settings_payload");
191 return CURLE_FAILED_INIT;
194 result = Curl_base64_encode(conn->data, (const char *)binsettings, binlen,
199 result = Curl_add_bufferf(req,
200 "Connection: Upgrade, HTTP2-Settings\r\n"
202 "HTTP2-Settings: %s\r\n",
203 NGHTTP2_PROTO_VERSION_ID, base64);
206 k->upgr101 = UPGR101_REQUESTED;
212 * If the read would block (EWOULDBLOCK) we return -1. Otherwise we return
213 * a regular CURLcode value.
215 static ssize_t http2_recv(struct connectdata *conn, int sockindex,
216 char *mem, size_t len, CURLcode *err)
219 (void)sockindex; /* we always do HTTP2 on sockindex 0 */
221 conn->proto.httpc.mem = mem;
222 conn->proto.httpc.size = len;
224 rc = nghttp2_session_recv(conn->proto.httpc.h2);
227 *err = CURLE_RECV_ERROR;
232 /* return number of received (decrypted) bytes */
233 static ssize_t http2_send(struct connectdata *conn, int sockindex,
234 const void *mem, size_t len, CURLcode *err)
236 /* TODO: proper implementation */
245 void Curl_http2_switched(struct connectdata *conn)
247 /* we are switched! */
248 conn->handler = &Curl_handler_http2;
249 conn->recv[FIRSTSOCKET] = http2_recv;
250 conn->send[FIRSTSOCKET] = http2_send;
251 infof(conn->data, "We have switched to HTTP2\n");