#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 "rawstr.h"
#include "multiif.h"
#include "memdebug.h"
#if (NGHTTP2_VERSION_NUM < 0x000300)
#error too old nghttp2 version, upgrade!
#endif
static int http2_perform_getsock(const struct connectdata *conn,
curl_socket_t *sock,
int numsocks)
{
const struct http_conn *httpc = &conn->proto.httpc;
int bitmap = GETSOCK_BLANK;
(void)numsocks;
sock[0] = conn->sock[FIRSTSOCKET];
if(nghttp2_session_want_read(httpc->h2))
bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
if(nghttp2_session_want_write(httpc->h2))
bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
return bitmap;
}
static int http2_getsock(struct connectdata *conn,
curl_socket_t *sock,
int numsocks)
{
return http2_perform_getsock(conn, sock, numsocks);
}
static CURLcode http2_disconnect(struct connectdata *conn,
bool dead_connection)
{
struct http_conn *httpc = &conn->proto.httpc;
(void)dead_connection;
infof(conn->data, "HTTP/2 DISCONNECT starts now\n");
nghttp2_session_del(httpc->h2);
Curl_safefree(httpc->header_recvbuf->buffer);
Curl_safefree(httpc->header_recvbuf);
Curl_safefree(httpc->inbuf);
infof(conn->data, "HTTP/2 DISCONNECT done\n");
return CURLE_OK;
}
const struct Curl_handler Curl_handler_http2 = {
"HTTP2",
ZERO_NULL,
Curl_http,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
http2_getsock,
http2_getsock,
ZERO_NULL,
http2_perform_getsock,
http2_disconnect,
ZERO_NULL,
PORT_HTTP,
CURLPROTO_HTTP,
PROTOPT_NONE
};
const struct Curl_handler Curl_handler_http2_ssl = {
"HTTP2",
ZERO_NULL,
Curl_http,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
ZERO_NULL,
http2_getsock,
http2_getsock,
ZERO_NULL,
http2_perform_getsock,
http2_disconnect,
ZERO_NULL,
PORT_HTTP,
CURLPROTO_HTTPS,
PROTOPT_SSL
};
int Curl_http2_ver(char *p, size_t len)
{
nghttp2_info *h2 = nghttp2_version(0);
return snprintf(p, len, " nghttp2/%s", h2->version_str);
}
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 *httpc = &conn->proto.httpc;
ssize_t written;
CURLcode rc;
(void)h2;
(void)flags;
rc = 0;
written = ((Curl_send*)httpc->send_underlying)(conn, FIRSTSOCKET,
data, length, &rc);
if(rc == 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;
}
static int on_frame_recv(nghttp2_session *session, const nghttp2_frame *frame,
void *userp)
{
struct connectdata *conn = (struct connectdata *)userp;
struct http_conn *c = &conn->proto.httpc;
int rv;
(void)session;
(void)frame;
infof(conn->data, "on_frame_recv() was called with header %x\n",
frame->hd.type);
switch(frame->hd.type) {
case NGHTTP2_HEADERS:
if(frame->headers.cat != NGHTTP2_HCAT_RESPONSE)
break;
c->bodystarted = TRUE;
Curl_add_buffer(c->header_recvbuf, "\r\n", 2);
c->nread_header_recvbuf = c->len < c->header_recvbuf->size_used ?
c->len : c->header_recvbuf->size_used;
memcpy(c->mem, c->header_recvbuf->buffer, c->nread_header_recvbuf);
c->mem += c->nread_header_recvbuf;
c->len -= c->nread_header_recvbuf;
break;
case NGHTTP2_PUSH_PROMISE:
rv = nghttp2_submit_rst_stream(session, NGHTTP2_FLAG_NONE,
frame->hd.stream_id, NGHTTP2_CANCEL);
if(nghttp2_is_fatal(rv)) {
return rv;
}
break;
}
return 0;
}
static int on_invalid_frame_recv(nghttp2_session *session,
const nghttp2_frame *frame,
nghttp2_error_code error_code, void *userp)
{
struct connectdata *conn = (struct connectdata *)userp;
(void)session;
(void)frame;
infof(conn->data, "on_invalid_frame_recv() was called, error_code = %d\n",
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_conn *c = &conn->proto.httpc;
size_t nread;
(void)session;
(void)flags;
(void)data;
infof(conn->data, "on_data_chunk_recv() "
"len = %u, stream = %x\n", len, stream_id);
if(stream_id != c->stream_id) {
return 0;
}
nread = c->len < len ? c->len : len;
memcpy(c->mem, data, nread);
c->mem += nread;
c->len -= nread;
infof(conn->data, "%zu data written\n", nread);
if(nread < len) {
c->data = data + nread;
c->datalen = len - nread;
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;
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;
infof(conn->data, "on_frame_send() was called\n");
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;
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,
nghttp2_error_code error_code, void *userp)
{
struct connectdata *conn = (struct connectdata *)userp;
struct http_conn *c = &conn->proto.httpc;
(void)session;
(void)stream_id;
infof(conn->data, "on_stream_close() was called, error_code = %d\n",
error_code);
if(stream_id != c->stream_id) {
return 0;
}
c->closed = TRUE;
return 0;
}
static int on_unknown_frame_recv(nghttp2_session *session,
const uint8_t *head, size_t headlen,
const uint8_t *payload, size_t payloadlen,
void *userp)
{
struct connectdata *conn = (struct connectdata *)userp;
(void)session;
(void)head;
(void)headlen;
(void)payload;
(void)payloadlen;
infof(conn->data, "on_unknown_frame_recv() was called\n");
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;
infof(conn->data, "on_begin_headers() was called\n");
return 0;
}
static const char STATUS[] = ":status";
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_conn *c = &conn->proto.httpc;
(void)session;
(void)frame;
(void)flags;
if(frame->hd.stream_id != c->stream_id) {
return 0;
}
if(namelen == sizeof(":status") - 1 &&
memcmp(STATUS, name, namelen) == 0) {
snprintf(c->header_recvbuf->buffer, 13, "HTTP/2.0 %s", value);
c->header_recvbuf->buffer[12] = '\r';
return 0;
}
else {
infof(conn->data, "got header\n");
Curl_add_buffer(c->header_recvbuf, name, namelen);
Curl_add_buffer(c->header_recvbuf, ":", 1);
Curl_add_buffer(c->header_recvbuf, value, valuelen);
Curl_add_buffer(c->header_recvbuf, "\r\n", 2);
}
return 0;
}
static const nghttp2_session_callbacks callbacks = {
send_callback,
NULL,
on_frame_recv,
on_invalid_frame_recv,
on_data_chunk_recv,
before_frame_send,
on_frame_send,
on_frame_not_send,
on_stream_close,
on_unknown_frame_recv,
on_begin_headers,
on_header
#if NGHTTP2_VERSION_NUM >= 0x000400
, NULL
#endif
};
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;
size_t nread;
(void)session;
(void)stream_id;
(void)source;
nread = c->upload_len < length ? c->upload_len : length;
if(nread > 0) {
memcpy(buf, c->upload_mem, nread);
c->upload_mem += nread;
c->upload_len -= nread;
c->upload_left -= nread;
}
if(c->upload_left == 0)
*data_flags = 1;
else if(nread == 0)
return NGHTTP2_ERR_DEFERRED;
return nread;
}
static nghttp2_settings_entry settings[] = {
{ NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100 },
{ NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, NGHTTP2_INITIAL_WINDOW_SIZE },
};
#define H2_BUFSIZE 4096
CURLcode Curl_http2_init(struct connectdata *conn)
{
if(!conn->proto.httpc.h2) {
int rc;
conn->proto.httpc.inbuf = malloc(H2_BUFSIZE);
if(conn->proto.httpc.inbuf == NULL)
return CURLE_OUT_OF_MEMORY;
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;
}
}
return CURLE_OK;
}
CURLcode Curl_http2_send_request(struct connectdata *conn)
{
(void)conn;
return CURLE_OK;
}
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;
result = Curl_http2_init(conn);
if(result)
return result;
result = Curl_http2_setup(conn);
if(result)
return result;
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_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_CLEARTEXT_PROTO_VERSION_ID, base64);
Curl_safefree(base64);
k->upgr101 = UPGR101_REQUESTED;
return result;
}
static ssize_t http2_recv(struct connectdata *conn, int sockindex,
char *mem, size_t len, CURLcode *err)
{
CURLcode rc;
ssize_t rv;
ssize_t nread;
struct http_conn *httpc = &conn->proto.httpc;
(void)sockindex;
if(httpc->closed) {
return 0;
}
httpc->upload_mem = NULL;
httpc->upload_len = 0;
if(httpc->bodystarted &&
httpc->nread_header_recvbuf < httpc->header_recvbuf->size_used) {
size_t left =
httpc->header_recvbuf->size_used - httpc->nread_header_recvbuf;
size_t ncopy = len < left ? len : left;
memcpy(mem, httpc->header_recvbuf->buffer + httpc->nread_header_recvbuf,
ncopy);
httpc->nread_header_recvbuf += ncopy;
return ncopy;
}
if(httpc->data) {
nread = len < httpc->datalen ? len : httpc->datalen;
memcpy(mem, httpc->data, nread);
httpc->data += nread;
httpc->datalen -= nread;
infof(conn->data, "%zu data written\n", nread);
if(httpc->datalen == 0) {
httpc->data = NULL;
httpc->datalen = 0;
}
return nread;
}
conn->proto.httpc.mem = mem;
conn->proto.httpc.len = len;
infof(conn->data, "http2_recv: %d bytes buffer\n",
conn->proto.httpc.len);
rc = 0;
nread = ((Curl_recv*)httpc->recv_underlying)(conn, FIRSTSOCKET,
httpc->inbuf, H2_BUFSIZE, &rc);
if(rc == CURLE_AGAIN) {
*err = rc;
return -1;
}
if(nread == -1) {
failf(conn->data, "Failed receiving HTTP2 data");
*err = rc;
return 0;
}
infof(conn->data, "nread=%zd\n", nread);
rv = nghttp2_session_mem_recv(httpc->h2,
(const uint8_t *)httpc->inbuf, nread);
if(nghttp2_is_fatal((int)rv)) {
failf(conn->data, "nghttp2_session_mem_recv() returned %d:%s\n",
rv, nghttp2_strerror((int)rv));
*err = CURLE_RECV_ERROR;
return 0;
}
infof(conn->data, "nghttp2_session_mem_recv() returns %zd\n", rv);
rv = nghttp2_session_send(httpc->h2);
if(rv != 0) {
*err = CURLE_SEND_ERROR;
return 0;
}
if(len != httpc->len) {
return len - conn->proto.httpc.len;
}
if(httpc->closed) {
return 0;
}
*err = CURLE_AGAIN;
return -1;
}
static ssize_t http2_send(struct connectdata *conn, int sockindex,
const void *mem, size_t len, CURLcode *err)
{
int rv;
struct http_conn *httpc = &conn->proto.httpc;
nghttp2_nv *nva;
size_t nheader;
size_t i;
char *hdbuf = (char*)mem;
char *end;
nghttp2_data_provider data_prd;
int32_t stream_id;
(void)sockindex;
infof(conn->data, "http2_send len=%zu\n", len);
if(httpc->stream_id != -1) {
httpc->upload_mem = mem;
httpc->upload_len = len;
nghttp2_session_resume_data(httpc->h2, httpc->stream_id);
rv = nghttp2_session_send(httpc->h2);
if(nghttp2_is_fatal(rv)) {
*err = CURLE_SEND_ERROR;
return -1;
}
return len - httpc->upload_len;
}
nheader = 0;
for(i = 0; i < len; ++i) {
if(hdbuf[i] == 0x0a) {
++nheader;
}
}
nheader += 1;
nva = malloc(sizeof(nghttp2_nv) * nheader);
if(nva == NULL) {
*err = CURLE_OUT_OF_MEMORY;
return -1;
}
end = strchr(hdbuf, ' ');
nva[0].name = (unsigned char *)":method";
nva[0].namelen = (uint16_t)strlen((char *)nva[0].name);
nva[0].value = (unsigned char *)hdbuf;
nva[0].valuelen = (uint16_t)(end - hdbuf);
nva[0].flags = NGHTTP2_NV_FLAG_NONE;
hdbuf = end + 1;
end = strchr(hdbuf, ' ');
nva[1].name = (unsigned char *)":path";
nva[1].namelen = (uint16_t)strlen((char *)nva[1].name);
nva[1].value = (unsigned char *)hdbuf;
nva[1].valuelen = (uint16_t)(end - hdbuf);
nva[1].flags = NGHTTP2_NV_FLAG_NONE;
nva[2].name = (unsigned char *)":scheme";
nva[2].namelen = (uint16_t)strlen((char *)nva[2].name);
if(conn->handler->flags & PROTOPT_SSL)
nva[2].value = (unsigned char *)"https";
else
nva[2].value = (unsigned char *)"http";
nva[2].valuelen = (uint16_t)strlen((char *)nva[2].value);
nva[2].flags = NGHTTP2_NV_FLAG_NONE;
hdbuf = strchr(hdbuf, 0x0a);
++hdbuf;
for(i = 3; i < nheader; ++i) {
end = strchr(hdbuf, ':');
assert(end);
if(end - hdbuf == 4 && Curl_raw_nequal("host", hdbuf, 4)) {
nva[i].name = (unsigned char *)":authority";
nva[i].namelen = (uint16_t)strlen((char *)nva[i].name);
}
else {
nva[i].name = (unsigned char *)hdbuf;
nva[i].namelen = (uint16_t)(end - hdbuf);
}
hdbuf = end + 1;
for(; *hdbuf == ' '; ++hdbuf);
end = strchr(hdbuf, 0x0d);
assert(end);
nva[i].value = (unsigned char *)hdbuf;
nva[i].valuelen = (uint16_t)(end - hdbuf);
nva[i].flags = NGHTTP2_NV_FLAG_NONE;
hdbuf = end + 2;
if(nva[i].namelen == 14 &&
Curl_raw_nequal("content-length", (char*)nva[i].name, 14)) {
size_t j;
for(j = 0; j < nva[i].valuelen; ++j) {
httpc->upload_left *= 10;
httpc->upload_left += nva[i].value[j] - '0';
}
infof(conn->data, "request content-length=%zu\n", httpc->upload_left);
}
}
switch(conn->data->set.httpreq) {
case HTTPREQ_POST:
case HTTPREQ_POST_FORM:
case HTTPREQ_PUT:
data_prd.read_callback = data_source_read_callback;
data_prd.source.ptr = NULL;
stream_id = nghttp2_submit_request(httpc->h2, NULL, nva, nheader,
&data_prd, NULL);
break;
default:
stream_id = nghttp2_submit_request(httpc->h2, NULL, nva, nheader,
NULL, NULL);
}
Curl_safefree(nva);
if(stream_id < 0) {
*err = CURLE_SEND_ERROR;
return -1;
}
httpc->stream_id = stream_id;
rv = nghttp2_session_send(httpc->h2);
if(rv != 0) {
*err = CURLE_SEND_ERROR;
return -1;
}
if(httpc->stream_id != -1) {
nghttp2_session_resume_data(httpc->h2, httpc->stream_id);
}
return len;
}
CURLcode Curl_http2_setup(struct connectdata *conn)
{
struct http_conn *httpc = &conn->proto.httpc;
if(conn->handler->flags & PROTOPT_SSL)
conn->handler = &Curl_handler_http2_ssl;
else
conn->handler = &Curl_handler_http2;
infof(conn->data, "Using HTTP2\n");
httpc->bodystarted = FALSE;
httpc->closed = FALSE;
httpc->header_recvbuf = Curl_add_buffer_init();
httpc->nread_header_recvbuf = 0;
httpc->data = NULL;
httpc->datalen = 0;
httpc->upload_left = 0;
httpc->upload_mem = NULL;
httpc->upload_len = 0;
httpc->stream_id = -1;
conn->httpversion = 20;
return Curl_add_buffer(httpc->header_recvbuf, "HTTP/2.0 200\r\n", 14);
}
int Curl_http2_switched(struct connectdata *conn)
{
CURLcode rc;
struct http_conn *httpc = &conn->proto.httpc;
int rv;
httpc->recv_underlying = (recving)conn->recv[FIRSTSOCKET];
httpc->send_underlying = (sending)conn->send[FIRSTSOCKET];
conn->recv[FIRSTSOCKET] = http2_recv;
conn->send[FIRSTSOCKET] = http2_send;
rv = (int) ((Curl_send*)httpc->send_underlying)
(conn, FIRSTSOCKET,
NGHTTP2_CLIENT_CONNECTION_PREFACE,
NGHTTP2_CLIENT_CONNECTION_PREFACE_LEN,
&rc);
assert(rv == 24);
if(conn->data->req.upgr101 == UPGR101_RECEIVED) {
httpc->stream_id = 1;
rv = nghttp2_session_upgrade(httpc->h2, httpc->binsettings,
httpc->binlen, NULL);
if(rv != 0) {
failf(conn->data, "nghttp2_session_upgrade() failed: %s(%d)",
nghttp2_strerror(rv), rv);
return -1;
}
}
else {
httpc->stream_id = -1;
rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE, NULL, 0);
if(rv != 0) {
failf(conn->data, "nghttp2_submit_settings() failed: %s(%d)",
nghttp2_strerror(rv), rv);
return -1;
}
}
return 0;
}
#endif