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"
39 /* include memdebug.h last */
42 #if (NGHTTP2_VERSION_NUM < 0x000300)
43 #error too old nghttp2 version, upgrade!
46 static int http2_perform_getsock(const struct connectdata *conn,
47 curl_socket_t *sock, /* points to
53 const struct http_conn *httpc = &conn->proto.httpc;
54 int bitmap = GETSOCK_BLANK;
57 /* TODO We should check underlying socket state if it is SSL socket
58 because of renegotiation. */
59 sock[0] = conn->sock[FIRSTSOCKET];
61 if(nghttp2_session_want_read(httpc->h2))
62 bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
64 if(nghttp2_session_want_write(httpc->h2))
65 bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
70 static int http2_getsock(struct connectdata *conn,
71 curl_socket_t *sock, /* points to numsocks
75 return http2_perform_getsock(conn, sock, numsocks);
78 static CURLcode http2_disconnect(struct connectdata *conn,
81 struct http_conn *httpc = &conn->proto.httpc;
82 (void)dead_connection;
84 infof(conn->data, "HTTP/2 DISCONNECT starts now\n");
86 nghttp2_session_del(httpc->h2);
88 Curl_safefree(httpc->header_recvbuf->buffer);
89 Curl_safefree(httpc->header_recvbuf);
91 Curl_safefree(httpc->inbuf);
93 infof(conn->data, "HTTP/2 DISCONNECT done\n");
99 * HTTP2 handler interface. This isn't added to the general list of protocols
100 * but will be used at run-time when the protocol is dynamically switched from
103 const struct Curl_handler Curl_handler_http2 = {
104 "HTTP2", /* scheme */
105 ZERO_NULL, /* setup_connection */
106 Curl_http, /* do_it */
107 ZERO_NULL, /* done */
108 ZERO_NULL, /* do_more */
109 ZERO_NULL, /* connect_it */
110 ZERO_NULL, /* connecting */
111 ZERO_NULL, /* doing */
112 http2_getsock, /* proto_getsock */
113 http2_getsock, /* doing_getsock */
114 ZERO_NULL, /* domore_getsock */
115 http2_perform_getsock, /* perform_getsock */
116 http2_disconnect, /* disconnect */
117 ZERO_NULL, /* readwrite */
118 PORT_HTTP, /* defport */
119 CURLPROTO_HTTP, /* protocol */
120 PROTOPT_NONE /* flags */
123 const struct Curl_handler Curl_handler_http2_ssl = {
124 "HTTP2", /* scheme */
125 ZERO_NULL, /* setup_connection */
126 Curl_http, /* do_it */
127 ZERO_NULL, /* done */
128 ZERO_NULL, /* do_more */
129 ZERO_NULL, /* connect_it */
130 ZERO_NULL, /* connecting */
131 ZERO_NULL, /* doing */
132 http2_getsock, /* proto_getsock */
133 http2_getsock, /* doing_getsock */
134 ZERO_NULL, /* domore_getsock */
135 http2_perform_getsock, /* perform_getsock */
136 http2_disconnect, /* disconnect */
137 ZERO_NULL, /* readwrite */
138 PORT_HTTP, /* defport */
139 CURLPROTO_HTTPS, /* protocol */
140 PROTOPT_SSL /* flags */
144 * Store nghttp2 version info in this buffer, Prefix with a space. Return
145 * total length written.
147 int Curl_http2_ver(char *p, size_t len)
149 nghttp2_info *h2 = nghttp2_version(0);
150 return snprintf(p, len, " nghttp2/%s", h2->version_str);
154 * The implementation of nghttp2_send_callback type. Here we write |data| with
155 * size |length| to the network and return the number of bytes actually
156 * written. See the documentation of nghttp2_send_callback for the details.
158 static ssize_t send_callback(nghttp2_session *h2,
159 const uint8_t *data, size_t length, int flags,
162 struct connectdata *conn = (struct connectdata *)userp;
163 struct http_conn *httpc = &conn->proto.httpc;
170 written = ((Curl_send*)httpc->send_underlying)(conn, FIRSTSOCKET,
173 if(rc == CURLE_AGAIN) {
174 return NGHTTP2_ERR_WOULDBLOCK;
178 failf(conn->data, "Failed sending HTTP2 data");
179 return NGHTTP2_ERR_CALLBACK_FAILURE;
183 return NGHTTP2_ERR_WOULDBLOCK;
188 static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
191 struct connectdata *conn = (struct connectdata *)userp;
192 struct http_conn *c = &conn->proto.httpc;
196 infof(conn->data, "on_frame_recv() was called with header %x\n",
198 switch(frame->hd.type) {
199 case NGHTTP2_HEADERS:
200 if(frame->headers.cat != NGHTTP2_HCAT_RESPONSE)
202 c->bodystarted = TRUE;
203 Curl_add_buffer(c->header_recvbuf, "\r\n", 2);
204 c->nread_header_recvbuf = c->len < c->header_recvbuf->size_used ?
205 c->len : c->header_recvbuf->size_used;
207 memcpy(c->mem, c->header_recvbuf->buffer, c->nread_header_recvbuf);
209 c->mem += c->nread_header_recvbuf;
210 c->len -= c->nread_header_recvbuf;
212 case NGHTTP2_PUSH_PROMISE:
213 rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
214 frame->hd.stream_id, NGHTTP2_CANCEL);
215 if(nghttp2_is_fatal(rv)) {
223 static int on_invalid_frame_recv(nghttp2_session *session,
224 const nghttp2_frame *frame,
225 nghttp2_error_code error_code, void *userp)
227 struct connectdata *conn = (struct connectdata *)userp;
230 infof(conn->data, "on_invalid_frame_recv() was called, error_code = %d\n",
235 static int on_data_chunk_recv(nghttp2_session *session, uint8_t flags,
237 const uint8_t *data, size_t len, void *userp)
239 struct connectdata *conn = (struct connectdata *)userp;
240 struct http_conn *c = &conn->proto.httpc;
245 infof(conn->data, "on_data_chunk_recv() "
246 "len = %u, stream = %x\n", len, stream_id);
248 if(stream_id != c->stream_id) {
252 nread = c->len < len ? c->len : len;
253 memcpy(c->mem, data, nread);
258 infof(conn->data, "%zu data written\n", nread);
261 c->data = data + nread;
262 c->datalen = len - nread;
263 return NGHTTP2_ERR_PAUSE;
268 static int before_frame_send(nghttp2_session *session,
269 const nghttp2_frame *frame,
272 struct connectdata *conn = (struct connectdata *)userp;
275 infof(conn->data, "before_frame_send() was called\n");
278 static int on_frame_send(nghttp2_session *session,
279 const nghttp2_frame *frame,
282 struct connectdata *conn = (struct connectdata *)userp;
285 infof(conn->data, "on_frame_send() was called\n");
288 static int on_frame_not_send(nghttp2_session *session,
289 const nghttp2_frame *frame,
290 int lib_error_code, void *userp)
292 struct connectdata *conn = (struct connectdata *)userp;
295 infof(conn->data, "on_frame_not_send() was called, lib_error_code = %d\n",
299 static int on_stream_close(nghttp2_session *session, int32_t stream_id,
300 nghttp2_error_code error_code, void *userp)
302 struct connectdata *conn = (struct connectdata *)userp;
303 struct http_conn *c = &conn->proto.httpc;
306 infof(conn->data, "on_stream_close() was called, error_code = %d\n",
309 if(stream_id != c->stream_id) {
318 static int on_unknown_frame_recv(nghttp2_session *session,
319 const uint8_t *head, size_t headlen,
320 const uint8_t *payload, size_t payloadlen,
323 struct connectdata *conn = (struct connectdata *)userp;
329 infof(conn->data, "on_unknown_frame_recv() was called\n");
332 static int on_begin_headers(nghttp2_session *session,
333 const nghttp2_frame *frame, void *userp)
335 struct connectdata *conn = (struct connectdata *)userp;
338 infof(conn->data, "on_begin_headers() was called\n");
342 static const char STATUS[] = ":status";
344 /* frame->hd.type is either NGHTTP2_HEADERS or NGHTTP2_PUSH_PROMISE */
345 static int on_header(nghttp2_session *session, const nghttp2_frame *frame,
346 const uint8_t *name, size_t namelen,
347 const uint8_t *value, size_t valuelen,
351 struct connectdata *conn = (struct connectdata *)userp;
352 struct http_conn *c = &conn->proto.httpc;
357 if(frame->hd.stream_id != c->stream_id) {
361 if(namelen == sizeof(":status") - 1 &&
362 memcmp(STATUS, name, namelen) == 0) {
363 snprintf(c->header_recvbuf->buffer, 13, "HTTP/2.0 %s", value);
364 c->header_recvbuf->buffer[12] = '\r';
368 /* convert to a HTTP1-style header */
369 infof(conn->data, "got header\n");
370 Curl_add_buffer(c->header_recvbuf, name, namelen);
371 Curl_add_buffer(c->header_recvbuf, ":", 1);
372 Curl_add_buffer(c->header_recvbuf, value, valuelen);
373 Curl_add_buffer(c->header_recvbuf, "\r\n", 2);
376 return 0; /* 0 is successful */
380 * This is all callbacks nghttp2 calls
382 static const nghttp2_session_callbacks callbacks = {
383 send_callback, /* nghttp2_send_callback */
384 NULL, /* nghttp2_recv_callback */
385 on_frame_recv, /* nghttp2_on_frame_recv_callback */
386 on_invalid_frame_recv, /* nghttp2_on_invalid_frame_recv_callback */
387 on_data_chunk_recv, /* nghttp2_on_data_chunk_recv_callback */
388 before_frame_send, /* nghttp2_before_frame_send_callback */
389 on_frame_send, /* nghttp2_on_frame_send_callback */
390 on_frame_not_send, /* nghttp2_on_frame_not_send_callback */
391 on_stream_close, /* nghttp2_on_stream_close_callback */
392 on_unknown_frame_recv, /* nghttp2_on_unknown_frame_recv_callback */
393 on_begin_headers, /* nghttp2_on_begin_headers_callback */
394 on_header /* nghttp2_on_header_callback */
395 #if NGHTTP2_VERSION_NUM >= 0x000400
396 , NULL /* nghttp2_select_padding_callback */
400 static ssize_t data_source_read_callback(nghttp2_session *session,
402 uint8_t *buf, size_t length,
403 uint32_t *data_flags,
404 nghttp2_data_source *source,
407 struct connectdata *conn = (struct connectdata *)userp;
408 struct http_conn *c = &conn->proto.httpc;
414 nread = c->upload_len < length ? c->upload_len : length;
416 memcpy(buf, c->upload_mem, nread);
417 c->upload_mem += nread;
418 c->upload_len -= nread;
419 c->upload_left -= nread;
422 if(c->upload_left == 0)
425 return NGHTTP2_ERR_DEFERRED;
431 * The HTTP2 settings we send in the Upgrade request
433 static nghttp2_settings_entry settings[] = {
434 { NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100 },
435 { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, NGHTTP2_INITIAL_WINDOW_SIZE },
438 #define H2_BUFSIZE 4096
441 * Initialize nghttp2 for a Curl connection
443 CURLcode Curl_http2_init(struct connectdata *conn)
445 if(!conn->proto.httpc.h2) {
447 conn->proto.httpc.inbuf = malloc(H2_BUFSIZE);
448 if(conn->proto.httpc.inbuf == NULL)
449 return CURLE_OUT_OF_MEMORY;
451 /* The nghttp2 session is not yet setup, do it */
452 rc = nghttp2_session_client_new(&conn->proto.httpc.h2,
455 failf(conn->data, "Couldn't initialize nghttp2!");
456 return CURLE_OUT_OF_MEMORY; /* most likely at least */
463 * Send a request using http2
465 CURLcode Curl_http2_send_request(struct connectdata *conn)
472 * Append headers to ask for a HTTP1.1 to HTTP2 upgrade.
474 CURLcode Curl_http2_request_upgrade(Curl_send_buffer *req,
475 struct connectdata *conn)
481 struct SingleRequest *k = &conn->data->req;
482 uint8_t *binsettings = conn->proto.httpc.binsettings;
484 Curl_http2_init(conn);
486 /* As long as we have a fixed set of settings, we don't have to dynamically
487 * figure out the base64 strings since it'll always be the same. However,
488 * the settings will likely not be fixed every time in the future.
491 /* this returns number of bytes it wrote */
492 binlen = nghttp2_pack_settings_payload(binsettings, H2_BINSETTINGS_LEN,
494 sizeof(settings)/sizeof(settings[0]));
496 failf(conn->data, "nghttp2 unexpectedly failed on pack_settings_payload");
497 return CURLE_FAILED_INIT;
499 conn->proto.httpc.binlen = binlen;
501 result = Curl_base64_encode(conn->data, (const char *)binsettings, binlen,
506 result = Curl_add_bufferf(req,
507 "Connection: Upgrade, HTTP2-Settings\r\n"
509 "HTTP2-Settings: %s\r\n",
510 NGHTTP2_CLEARTEXT_PROTO_VERSION_ID, base64);
511 Curl_safefree(base64);
513 k->upgr101 = UPGR101_REQUESTED;
519 * If the read would block (EWOULDBLOCK) we return -1. Otherwise we return
520 * a regular CURLcode value.
522 static ssize_t http2_recv(struct connectdata *conn, int sockindex,
523 char *mem, size_t len, CURLcode *err)
528 struct http_conn *httpc = &conn->proto.httpc;
530 (void)sockindex; /* we always do HTTP2 on sockindex 0 */
536 /* Nullify here because we call nghttp2_session_send() and they
537 might refer to the old buffer. */
538 httpc->upload_mem = NULL;
539 httpc->upload_len = 0;
541 if(httpc->bodystarted &&
542 httpc->nread_header_recvbuf < httpc->header_recvbuf->size_used) {
544 httpc->header_recvbuf->size_used - httpc->nread_header_recvbuf;
545 size_t ncopy = len < left ? len : left;
546 memcpy(mem, httpc->header_recvbuf->buffer + httpc->nread_header_recvbuf,
548 httpc->nread_header_recvbuf += ncopy;
553 nread = len < httpc->datalen ? len : httpc->datalen;
554 memcpy(mem, httpc->data, nread);
556 httpc->data += nread;
557 httpc->datalen -= nread;
559 infof(conn->data, "%zu data written\n", nread);
560 if(httpc->datalen == 0) {
567 conn->proto.httpc.mem = mem;
568 conn->proto.httpc.len = len;
570 infof(conn->data, "http2_recv: %d bytes buffer\n",
571 conn->proto.httpc.len);
574 nread = ((Curl_recv*)httpc->recv_underlying)(conn, FIRSTSOCKET,
575 httpc->inbuf, H2_BUFSIZE, &rc);
577 if(rc == CURLE_AGAIN) {
583 failf(conn->data, "Failed receiving HTTP2 data");
588 infof(conn->data, "nread=%zd\n", nread);
589 rv = nghttp2_session_mem_recv(httpc->h2,
590 (const uint8_t *)httpc->inbuf, nread);
592 if(nghttp2_is_fatal((int)rv)) {
593 failf(conn->data, "nghttp2_session_mem_recv() returned %d:%s\n",
594 rv, nghttp2_strerror((int)rv));
595 *err = CURLE_RECV_ERROR;
598 infof(conn->data, "nghttp2_session_mem_recv() returns %zd\n", rv);
599 /* Always send pending frames in nghttp2 session, because
600 nghttp2_session_mem_recv() may queue new frame */
601 rv = nghttp2_session_send(httpc->h2);
603 *err = CURLE_SEND_ERROR;
606 if(len != httpc->len) {
607 return len - conn->proto.httpc.len;
609 /* If stream is closed, return 0 to signal the http routine to close
618 /* return number of received (decrypted) bytes */
619 static ssize_t http2_send(struct connectdata *conn, int sockindex,
620 const void *mem, size_t len, CURLcode *err)
623 * BIG TODO: Currently, we send request in this function, but this
624 * function is also used to send request body. It would be nice to
625 * add dedicated function for request.
628 struct http_conn *httpc = &conn->proto.httpc;
632 char *hdbuf = (char*)mem;
634 nghttp2_data_provider data_prd;
639 infof(conn->data, "http2_send len=%zu\n", len);
641 if(httpc->stream_id != -1) {
642 /* If stream_id != -1, we have dispatched request HEADERS, and now
643 are going to send or sending request body in DATA frame */
644 httpc->upload_mem = mem;
645 httpc->upload_len = len;
646 nghttp2_session_resume_data(httpc->h2, httpc->stream_id);
647 rv = nghttp2_session_send(httpc->h2);
648 if(nghttp2_is_fatal(rv)) {
649 *err = CURLE_SEND_ERROR;
652 return len - httpc->upload_len;
655 /* Calculate number of headers contained in [mem, mem + len) */
656 /* Here, we assume the curl http code generate *correct* HTTP header
659 for(i = 0; i < len; ++i) {
660 if(hdbuf[i] == 0x0a) {
664 /* We counted additional 2 \n in the first and last line. We need 3
665 new headers: :method, :path and :scheme. Therefore we need one
668 nva = malloc(sizeof(nghttp2_nv) * nheader);
670 *err = CURLE_OUT_OF_MEMORY;
673 /* Extract :method, :path from request line */
674 end = strchr(hdbuf, ' ');
675 nva[0].name = (unsigned char *)":method";
676 nva[0].namelen = (uint16_t)strlen((char *)nva[0].name);
677 nva[0].value = (unsigned char *)hdbuf;
678 nva[0].valuelen = (uint16_t)(end - hdbuf);
679 nva[0].flags = NGHTTP2_NV_FLAG_NONE;
683 end = strchr(hdbuf, ' ');
684 nva[1].name = (unsigned char *)":path";
685 nva[1].namelen = (uint16_t)strlen((char *)nva[1].name);
686 nva[1].value = (unsigned char *)hdbuf;
687 nva[1].valuelen = (uint16_t)(end - hdbuf);
688 nva[1].flags = NGHTTP2_NV_FLAG_NONE;
690 nva[2].name = (unsigned char *)":scheme";
691 nva[2].namelen = (uint16_t)strlen((char *)nva[2].name);
692 if(conn->handler->flags & PROTOPT_SSL)
693 nva[2].value = (unsigned char *)"https";
695 nva[2].value = (unsigned char *)"http";
696 nva[2].valuelen = (uint16_t)strlen((char *)nva[2].value);
697 nva[2].flags = NGHTTP2_NV_FLAG_NONE;
699 hdbuf = strchr(hdbuf, 0x0a);
702 for(i = 3; i < nheader; ++i) {
703 end = strchr(hdbuf, ':');
705 if(end - hdbuf == 4 && Curl_raw_nequal("host", hdbuf, 4)) {
706 nva[i].name = (unsigned char *)":authority";
707 nva[i].namelen = (uint16_t)strlen((char *)nva[i].name);
710 nva[i].name = (unsigned char *)hdbuf;
711 nva[i].namelen = (uint16_t)(end - hdbuf);
714 for(; *hdbuf == ' '; ++hdbuf);
715 end = strchr(hdbuf, 0x0d);
717 nva[i].value = (unsigned char *)hdbuf;
718 nva[i].valuelen = (uint16_t)(end - hdbuf);
719 nva[i].flags = NGHTTP2_NV_FLAG_NONE;
722 /* Inspect Content-Length header field and retrieve the request
723 entity length so that we can set END_STREAM to the last DATA
725 if(nva[i].namelen == 14 &&
726 Curl_raw_nequal("content-length", (char*)nva[i].name, 14)) {
728 for(j = 0; j < nva[i].valuelen; ++j) {
729 httpc->upload_left *= 10;
730 httpc->upload_left += nva[i].value[j] - '0';
732 infof(conn->data, "request content-length=%zu\n", httpc->upload_left);
736 switch(conn->data->set.httpreq) {
738 case HTTPREQ_POST_FORM:
740 data_prd.read_callback = data_source_read_callback;
741 data_prd.source.ptr = NULL;
742 stream_id = nghttp2_submit_request(httpc->h2, NULL, nva, nheader,
746 stream_id = nghttp2_submit_request(httpc->h2, NULL, nva, nheader,
753 *err = CURLE_SEND_ERROR;
757 httpc->stream_id = stream_id;
759 rv = nghttp2_session_send(httpc->h2);
762 *err = CURLE_SEND_ERROR;
766 if(httpc->stream_id != -1) {
767 /* If whole HEADERS frame was sent off to the underlying socket,
768 the nghttp2 library calls data_source_read_callback. But only
769 it found that no data available, so it deferred the DATA
770 transmission. Which means that nghttp2_session_want_write()
771 returns 0 on http2_perform_getsock(), which results that no
772 writable socket check is performed. To workaround this, we
773 issue nghttp2_session_resume_data() here to bring back DATA
774 transmission from deferred state. */
775 nghttp2_session_resume_data(httpc->h2, httpc->stream_id);
781 void Curl_http2_setup(struct connectdata *conn)
783 struct http_conn *httpc = &conn->proto.httpc;
784 if(conn->handler->flags & PROTOPT_SSL)
785 conn->handler = &Curl_handler_http2_ssl;
787 conn->handler = &Curl_handler_http2;
789 infof(conn->data, "Using HTTP2\n");
790 httpc->bodystarted = FALSE;
791 httpc->closed = FALSE;
792 httpc->header_recvbuf = Curl_add_buffer_init();
793 httpc->nread_header_recvbuf = 0;
796 httpc->upload_left = 0;
797 httpc->upload_mem = NULL;
798 httpc->upload_len = 0;
799 httpc->stream_id = -1;
801 conn->httpversion = 20;
803 /* Put place holder for status line */
804 Curl_add_buffer(httpc->header_recvbuf, "HTTP/2.0 200\r\n", 14);
807 int Curl_http2_switched(struct connectdata *conn)
809 /* TODO: May get CURLE_AGAIN */
811 struct http_conn *httpc = &conn->proto.httpc;
814 httpc->recv_underlying = (recving)conn->recv[FIRSTSOCKET];
815 httpc->send_underlying = (sending)conn->send[FIRSTSOCKET];
816 conn->recv[FIRSTSOCKET] = http2_recv;
817 conn->send[FIRSTSOCKET] = http2_send;
819 rv = (int) ((Curl_send*)httpc->send_underlying)
821 NGHTTP2_CLIENT_CONNECTION_PREFACE,
822 NGHTTP2_CLIENT_CONNECTION_PREFACE_LEN,
825 if(conn->data->req.upgr101 == UPGR101_RECEIVED) {
826 /* stream 1 is opened implicitly on upgrade */
827 httpc->stream_id = 1;
828 /* queue SETTINGS frame (again) */
829 rv = nghttp2_session_upgrade(httpc->h2, httpc->binsettings,
830 httpc->binlen, NULL);
832 failf(conn->data, "nghttp2_session_upgrade() failed: %s(%d)",
833 nghttp2_strerror(rv), rv);
838 /* stream ID is unknown at this point */
839 httpc->stream_id = -1;
840 rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE, NULL, 0);
842 failf(conn->data, "nghttp2_submit_settings() failed: %s(%d)",
843 nghttp2_strerror(rv), rv);