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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2013, 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
#define _MPRINTF_REPLACE
#include <curl/mprintf.h>
#include <nghttp2/nghttp2.h>
#include "urldata.h"
#include "http2.h"
#include "http.h"
#include "sendf.h"
#include "curl_base64.h"
#include "curl_memory.h"
/* include memdebug.h last */
#include "memdebug.h"
/*
* Store nghttp2 version info in this buffer, Prefix with a space. Return
* total length written.
*/
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;
ssize_t written;
CURLcode rc =
Curl_write(conn, conn->sock[0], data, length, &written);
(void)h2;
(void)flags;
if(rc) {
failf(conn->data, "Failed sending HTTP2 data");
return NGHTTP2_ERR_CALLBACK_FAILURE;
}
else if(!written)
return NGHTTP2_ERR_WOULDBLOCK;
return written;
}
/*
* The implementation of nghttp2_recv_callback type. Here we read data from
* the network and write them in |buf|. The capacity of |buf| is |length|
* bytes. Returns the number of bytes stored in |buf|. See the documentation
* of nghttp2_recv_callback for the details.
*/
static ssize_t recv_callback(nghttp2_session *h2,
uint8_t *buf, size_t length, int flags,
void *userp)
{
struct connectdata *conn = (struct connectdata *)userp;
ssize_t nread;
CURLcode rc = Curl_read(conn, conn->sock[0], (char *)buf, length, &nread);
(void)h2;
(void)flags;
if(rc) {
failf(conn->data, "Failed recving HTTP2 data");
return NGHTTP2_ERR_CALLBACK_FAILURE;
}
if(!nread)
return NGHTTP2_ERR_WOULDBLOCK;
return nread;
}
/*
* This is all callbacks nghttp2 calls
*/
static const nghttp2_session_callbacks callbacks = {
send_callback,
recv_callback,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
/*
* 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 },
};
/*
* Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
*/
CURLcode Curl_http2_request(Curl_send_buffer *req,
struct connectdata *conn)
{
uint8_t binsettings[80];
CURLcode result;
ssize_t binlen;
char *base64;
size_t blen;
if(!conn->proto.httpc.h2) {
/* The nghttp2 session is not yet setup, do it */
int rc = nghttp2_session_client_new(&conn->proto.httpc.h2,
&callbacks, &conn);
if(rc) {
failf(conn->data, "Couldn't initialize nghttp2!");
return CURLE_OUT_OF_MEMORY; /* most likely at least */
}
}
/* 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,
sizeof(binsettings),
settings,
sizeof(settings)/sizeof(settings[0]));
if(!binlen) {
failf(conn->data, "nghttp2 unexpectedly failed on pack_settings_payload");
return CURLE_FAILED_INIT;
}
result = Curl_base64_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_PROTO_VERSION_ID, base64);
free(base64);
return result;
}
#endif
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