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http2.c
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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"
#include "conncache.h"
#include "url.h"
/* The last #include files should be: */
#include "curl_memory.h"
#include "memdebug.h"
#define MIN(x,y) ((x)<(y)?(x):(y))
#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 *c = &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(c->h2))
bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
if(nghttp2_session_want_write(c->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 *c = &conn->proto.httpc;
(void)dead_connection;
DEBUGF(infof(conn->data, "HTTP/2 DISCONNECT starts now\n"));
nghttp2_session_del(c->h2);
Curl_safefree(c->inbuf);
Curl_hash_destroy(&c->streamsh);
DEBUGF(infof(conn->data, "HTTP/2 DISCONNECT done\n"));
return CURLE_OK;
}
/* called from Curl_http_setup_conn */
void Curl_http2_setup_req(struct SessionHandle *data)
{
struct HTTP *http = data->req.protop;
http->nread_header_recvbuf = 0;
http->bodystarted = FALSE;
http->status_code = -1;
http->pausedata = NULL;
http->pauselen = 0;
http->error_code = NGHTTP2_NO_ERROR;
http->closed = FALSE;
http->mem = data->state.buffer;
http->len = BUFSIZE;
http->memlen = 0;
}
/* called from Curl_http_setup_conn */
void Curl_http2_setup_conn(struct connectdata *conn)
{
conn->proto.httpc.settings.max_concurrent_streams =
DEFAULT_MAX_CONCURRENT_STREAMS;
}
/*
* 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.
*/
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 *c = &conn->proto.httpc;
ssize_t written;
CURLcode result = CURLE_OK;
(void)h2;
(void)flags;
written = ((Curl_send*)c->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;
}
/* 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 SessionHandle *data;
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 {
struct HTTP *stream = h->data->req.protop;
if(num < stream->push_headers_used)
return 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, char *header)
{
/* 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) || !header)
return NULL;
else {
struct HTTP *stream = h->data->req.protop;
size_t len = strlen(header);
size_t i;
for(i=0; i<stream->push_headers_used; i++) {
if(!strncmp(header, stream->push_headers[i], len)) {
/* sub-match, make sure that it us followed by a colon */
if(stream->push_headers[i][len] != ':')
continue;
return &stream->push_headers[i][len+1];
}
}
}
return NULL;
}
static CURL *duphandle(struct SessionHandle *data)
{
struct SessionHandle *second = curl_easy_duphandle(data);
if(second) {
/* setup the request struct */
struct HTTP *http = calloc(1, sizeof(struct HTTP));
if(!http) {
(void)Curl_close(second);
second = NULL;
}
else {
second->req.protop = http;
http->header_recvbuf = Curl_add_buffer_init();
if(!http->header_recvbuf) {
free(http);
(void)Curl_close(second);
second = NULL;
}
else
Curl_http2_setup_req(second);
}
}
return second;
}
static int push_promise(struct SessionHandle *data,
struct connectdata *conn,
const nghttp2_push_promise *frame)
{
int rv;
DEBUGF(infof(data, "PUSH_PROMISE received, stream %u!\n",
frame->promised_stream_id));
if(data->multi->push_cb) {
struct HTTP *stream;
struct curl_pushheaders heads;
CURLMcode rc;
struct http_conn *httpc;
size_t i;
/* clone the parent */
CURL *newhandle = duphandle(data);
if(!newhandle) {
infof(data, "failed to duplicate handle\n");
rv = 1; /* FAIL HARD */
goto fail;
}
heads.data = data;
heads.frame = frame;
/* ask the application */
DEBUGF(infof(data, "Got PUSH_PROMISE, ask application!\n"));
stream = data->req.protop;
rv = data->multi->push_cb(data, newhandle,
stream->push_headers_used, &heads,
data->multi->push_userp);
/* free the headers again */
for(i=0; i<stream->push_headers_used; i++)
free(stream->push_headers[i]);
free(stream->push_headers);
stream->push_headers = NULL;
if(rv) {
/* denied, kill off the new handle again */
(void)Curl_close(newhandle);
goto fail;
}
/* approved, add to the multi handle and immediately switch to PERFORM
state with the given connection !*/
rc = Curl_multi_add_perform(data->multi, newhandle, conn);
if(rc) {
infof(data, "failed to add handle to multi\n");
Curl_close(newhandle);
rv = 1;
goto fail;
}
httpc = &conn->proto.httpc;
/* put the newhandle in the hash with the stream id as key */
if(!Curl_hash_add(&httpc->streamsh,
(size_t *)&frame->promised_stream_id,
sizeof(frame->promised_stream_id), newhandle)) {
failf(conn->data, "Couldn't add stream to hash!");
rv = 1;
}
else
rv = 0;
}
else {
DEBUGF(infof(data, "Got PUSH_PROMISE, ignore it!\n"));
rv = 1;
}
fail:
return rv;
}
static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
void *userp)
{
struct connectdata *conn = (struct connectdata *)userp;
struct http_conn *httpc = &conn->proto.httpc;
struct SessionHandle *data_s = NULL;
struct HTTP *stream = NULL;
int rv;
size_t left, ncopy;
int32_t stream_id = frame->hd.stream_id;
(void)session;
(void)frame;
DEBUGF(infof(conn->data, "on_frame_recv() header %x stream %x\n",
frame->hd.type, stream_id));
if(stream_id) {
/* get the stream from the hash based on Stream ID, stream ID zero is for
connection-oriented stuff */
data_s = Curl_hash_pick(&httpc->streamsh, &stream_id,
sizeof(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! */
failf(conn->data, "Received frame on Stream ID: %x not in stream hash!",
stream_id);
return NGHTTP2_ERR_CALLBACK_FAILURE;
}
stream = data_s->req.protop;
}
else
/* we do nothing on stream zero */
return 0;
switch(frame->hd.type) {
case NGHTTP2_DATA:
/* If body started on this stream, then receiving DATA is illegal. */
if(!stream->bodystarted) {
rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
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(stream->bodystarted) {
/* Only valid HEADERS after body started is trailer HEADERS. We
ignores trailer HEADERS for now. nghttp2 guarantees that it
has END_STREAM flag set. */
break;
}
/* nghttp2 guarantees that :status is received, and we store it to
stream->status_code */
DEBUGASSERT(stream->status_code != -1);
/* Only final status code signals the end of header */
if(stream->status_code / 100 != 1) {
stream->bodystarted = TRUE;
stream->status_code = -1;
}
Curl_add_buffer(stream->header_recvbuf, "\r\n", 2);
left = stream->header_recvbuf->size_used - stream->nread_header_recvbuf;
ncopy = MIN(stream->len, left);
memcpy(&stream->mem[stream->memlen],
stream->header_recvbuf->buffer + stream->nread_header_recvbuf,
ncopy);
stream->nread_header_recvbuf += ncopy;
DEBUGF(infof(data_s, "Store %zu bytes headers from stream %u at %p\n",
ncopy, stream_id, stream->mem));
stream->len -= ncopy;
stream->memlen += ncopy;
data_s->state.drain++;
Curl_expire(data_s, 1);
break;
case NGHTTP2_PUSH_PROMISE:
rv = push_promise(data_s, conn, &frame->push_promise);
if(rv) { /* deny! */
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;
case NGHTTP2_SETTINGS:
{
uint32_t max_conn = httpc->settings.max_concurrent_streams;
DEBUGF(infof(conn->data, "Got SETTINGS for stream %u!\n", stream_id));
httpc->settings.max_concurrent_streams =
nghttp2_session_get_remote_settings(
session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS);
httpc->settings.enable_push =
nghttp2_session_get_remote_settings(
session, NGHTTP2_SETTINGS_ENABLE_PUSH);
DEBUGF(infof(conn->data, "MAX_CONCURRENT_STREAMS == %d\n",
httpc->settings.max_concurrent_streams));
DEBUGF(infof(conn->data, "ENABLE_PUSH == %s\n",
httpc->settings.enable_push?"TRUE":"false"));
if(max_conn != httpc->settings.max_concurrent_streams) {
/* only signal change if the value actually changed */
infof(conn->data,
"Connection state changed (MAX_CONCURRENT_STREAMS updated)!\n");
Curl_multi_connchanged(conn->data->multi);
}
}
break;
default:
DEBUGF(infof(conn->data, "Got frame type %x for stream %u!\n",
frame->hd.type, stream_id));
break;
}
return 0;
}
static int on_invalid_frame_recv(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_invalid_frame_recv() was called, error=%d:%s\n",
lib_error_code, nghttp2_strerror(lib_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 *stream;
struct SessionHandle *data_s;
size_t nread;
(void)session;
(void)flags;
(void)data;
DEBUGF(infof(conn->data, "on_data_chunk_recv() "
"len = %u, stream %u\n", len, stream_id));
DEBUGASSERT(stream_id); /* should never be a zero stream ID here */
/* get the stream from the hash based on Stream ID */
data_s = Curl_hash_pick(&conn->proto.httpc.streamsh, &stream_id,
sizeof(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! */
failf(conn->data, "Received frame on Stream ID: %x not in stream hash!",
stream_id);
return NGHTTP2_ERR_CALLBACK_FAILURE;
}
stream = data_s->req.protop;
nread = MIN(stream->len, len);
memcpy(&stream->mem[stream->memlen], data, nread);
stream->len -= nread;
stream->memlen += nread;
data_s->state.drain++;
Curl_expire(data_s, 1); /* TODO: fix so that this can be set to 0 for
immediately? */
DEBUGF(infof(data_s, "%zu data received for stream %u "
"(%zu left in buffer %p, total %zu)\n",
nread, stream_id,
stream->len, stream->mem,
stream->memlen));
if(nread < len) {
stream->pausedata = data + nread;
stream->pauselen = len - nread;
DEBUGF(infof(data_s, "NGHTTP2_ERR_PAUSE - %zu bytes out of buffer"
", stream %u\n",
len - nread, stream_id));
conn->proto.httpc.pause_stream_id = stream_id;
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, length = %zd\n",
frame->hd.length));
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 SessionHandle *data_s;
struct HTTP *stream;
(void)session;
(void)stream_id;
DEBUGF(infof(conn->data, "on_stream_close(), error_code = %d, stream %u\n",
error_code, stream_id));
if(stream_id) {
/* get the stream from the hash based on Stream ID, stream ID zero is for
connection-oriented stuff */
data_s = Curl_hash_pick(&conn->proto.httpc.streamsh, &stream_id,
sizeof(stream_id));
if(!data_s) {
/* We could get stream ID not in the hash. For example, if we
decided to reject stream (e.g., PUSH_PROMISE). We call infof
as a debugging purpose for now. */
infof(conn->data,
"Received frame on Stream ID: %x not in stream hash!\n",
stream_id);
return 0;
}
stream = data_s->req.protop;
stream->error_code = error_code;
stream->closed = TRUE;
/* remove the entry from the hash as the stream is now gone */
Curl_hash_delete(&conn->proto.httpc.streamsh,
&stream_id, sizeof(stream_id));
DEBUGF(infof(conn->data, "Removed stream %u hash!\n", stream_id));
}
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;
}
/* 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 *stream;
struct SessionHandle *data_s;
int32_t stream_id = frame->hd.stream_id;
(void)session;
(void)frame;
(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 = Curl_hash_pick(&conn->proto.httpc.streamsh, &stream_id,
sizeof(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! */
failf(conn->data, "Received frame on Stream ID: %x not in stream hash!",
stream_id);
return NGHTTP2_ERR_CALLBACK_FAILURE;
}
stream = data_s->req.protop;
if(stream->bodystarted)
/* Ignore trailer or HEADERS not mapped to HTTP semantics. The
consequence is handled in on_frame_recv(). */
return 0;
/* 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(!stream->push_headers) {
stream->push_headers_alloc = 10;
stream->push_headers = malloc(stream->push_headers_alloc *
sizeof(char *));
stream->push_headers_used = 0;
}
else if(stream->push_headers_used ==
stream->push_headers_alloc) {
char **headp;
stream->push_headers_alloc *= 2;
headp = realloc(stream->push_headers,
stream->push_headers_alloc * sizeof(char *));
if(!headp) {
free(stream->push_headers);
stream->push_headers = NULL;
return 1;
}
stream->push_headers = headp;
}
h = aprintf("%s:%s", name, value);
if(h)
stream->push_headers[stream->push_headers_used++] = h;
return 0;
}
if(namelen == sizeof(":status") - 1 &&
memcmp(":status", name, namelen) == 0) {
/* nghttp2 guarantees :status is received first and only once, and
value is 3 digits status code, and decode_status_code always
succeeds. */
stream->status_code = decode_status_code(value, valuelen);
DEBUGASSERT(stream->status_code != -1);
Curl_add_buffer(stream->header_recvbuf, "HTTP/2.0 ", 9);
Curl_add_buffer(stream->header_recvbuf, value, valuelen);
Curl_add_buffer(stream->header_recvbuf, "\r\n", 2);
data_s->state.drain++;
Curl_expire(data_s, 1);
DEBUGF(infof(data_s, "h2 status: HTTP/2 %03d\n",
stream->status_code));
return 0;
}
/* nghttp2 guarantees that namelen > 0, and :status was already
received, and this is not pseudo-header field . */
/* convert to a HTTP1-style header */
Curl_add_buffer(stream->header_recvbuf, name, namelen);
Curl_add_buffer(stream->header_recvbuf, ":", 1);
Curl_add_buffer(stream->header_recvbuf, value, valuelen);
Curl_add_buffer(stream->header_recvbuf, "\r\n", 2);
data_s->state.drain++;
Curl_expire(data_s, 1);
DEBUGF(infof(data_s, "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;
struct SessionHandle *data_s;
struct HTTP *stream = NULL;
size_t nread;
(void)session;
(void)stream_id;
(void)source;
if(stream_id) {
/* get the stream from the hash based on Stream ID, stream ID zero is for
connection-oriented stuff */
data_s = Curl_hash_pick(&c->streamsh, &stream_id, sizeof(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! */
failf(conn->data, "Asked for data to stream %u not in hash!", stream_id);
return NGHTTP2_ERR_CALLBACK_FAILURE;
}
stream = data_s->req.protop;
}
else {
failf(conn->data, "nghttp2 confusion");
return NGHTTP2_ERR_INVALID_ARGUMENT;
}
nread = MIN(stream->upload_len, length);
if(nread > 0) {
memcpy(buf, stream->upload_mem, nread);
stream->upload_mem += nread;
stream->upload_len -= nread;
stream->upload_left -= nread;
}
if(stream->upload_left == 0)
*data_flags = 1;
else if(nread == 0)
return NGHTTP2_ERR_DEFERRED;
DEBUGF(infof(data_s, "data_source_read_callback: "
"returns %zu bytes stream %u\n",
nread, stream_id));
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 32768
static void freestreamentry(void *freethis)
{
(void)freethis;
}
/*
* Initialize nghttp2 for a Curl connection
*/
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 */
}
rc = Curl_hash_init(&conn->proto.httpc.streamsh, 7, Curl_hash_str,
Curl_str_key_compare, freestreamentry);
if(rc) {
failf(conn->data, "Couldn't init stream hash!");
return CURLE_OUT_OF_MEMORY; /* most likely at least */
}
}
return CURLE_OK;
}
/*
* Send a request using http2
*/
CURLcode Curl_http2_send_request(struct connectdata *conn)
{
(void)conn;
return CURLE_OK;
}
/*
* Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
*/
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;
}
static ssize_t http2_handle_stream_close(struct http_conn *httpc,
struct SessionHandle *data,
struct HTTP *stream, CURLcode *err) {
if(httpc->pause_stream_id == stream->stream_id) {
httpc->pause_stream_id = 0;
}
/* Reset to FALSE to prevent infinite loop in readwrite_data
function. */
stream->closed = FALSE;
if(stream->error_code != NGHTTP2_NO_ERROR) {
failf(data, "HTTP/2 stream %u was not closed cleanly: error_code = %d",
stream->stream_id, stream->error_code);
*err = CURLE_HTTP2;
return -1;
}
DEBUGF(infof(data, "http2_recv returns 0, http2_handle_stream_close\n"));
return 0;
}
/*
* 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;
struct SessionHandle *data = conn->data;
struct HTTP *stream = data->req.protop;
(void)sockindex; /* we always do HTTP2 on sockindex 0 */
/* If stream is closed, return 0 to signal the http routine to close
the connection. We need to handle stream closure here,
otherwise, we may be going to read from underlying connection,
and gets EAGAIN, and we will get stuck there. */
if(stream->memlen == 0 && stream->closed) {
return http2_handle_stream_close(httpc, data, stream, err);
}
/* Nullify here because we call nghttp2_session_send() and they
might refer to the old buffer. */
stream->upload_mem = NULL;