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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2019, 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 https://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_QUICHE
#include <quiche.h>
#include <openssl/err.h>
#include "urldata.h"
#include "sendf.h"
#include "strdup.h"
#include "rand.h"
#include "quic.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
#define QUIC_MAX_STREAMS (256*1024)
#define QUIC_MAX_DATA (1*1024*1024)
#define QUIC_IDLE_TIMEOUT 60 * 1000 /* milliseconds */
static CURLcode process_ingress(struct connectdata *conn,
curl_socket_t sockfd);
static CURLcode flush_egress(struct connectdata *conn, curl_socket_t sockfd);
static Curl_recv quic_stream_recv;
static Curl_send quic_stream_send;
CURLcode Curl_quic_connect(struct connectdata *conn, curl_socket_t sockfd,
const struct sockaddr *addr, socklen_t addrlen)
{
CURLcode result;
struct quicsocket *qs = &conn->quic;
(void)addr;
(void)addrlen;
infof(conn->data, "Connecting socket %d over QUIC\n", sockfd);
qs->cfg = quiche_config_new(QUICHE_PROTOCOL_VERSION);
if(!qs->cfg)
return CURLE_FAILED_INIT; /* TODO: better return code */
quiche_config_set_idle_timeout(qs->cfg, QUIC_IDLE_TIMEOUT);
quiche_config_set_initial_max_data(qs->cfg, QUIC_MAX_DATA);
quiche_config_set_initial_max_stream_data_bidi_local(qs->cfg, QUIC_MAX_DATA);
quiche_config_set_initial_max_stream_data_bidi_remote(qs->cfg, QUIC_MAX_DATA);
quiche_config_set_initial_max_stream_data_uni(qs->cfg, QUIC_MAX_DATA);
quiche_config_set_initial_max_streams_bidi(qs->cfg, QUIC_MAX_STREAMS);
quiche_config_set_initial_max_streams_uni(qs->cfg, QUIC_MAX_STREAMS);
quiche_config_set_application_protos(qs->cfg, (uint8_t *) "\x05hq-20", 6);
result = Curl_rand(conn->data, qs->scid, sizeof(qs->scid));
if(result)
return result;
qs->conn = quiche_connect(conn->host.name, (const uint8_t *) qs->scid,
sizeof(qs->scid), qs->cfg);
if(!qs->conn)
return CURLE_FAILED_INIT; /* TODO: better return code */
result = flush_egress(conn, sockfd);
if(result)
return CURLE_FAILED_INIT; /* TODO: better return code */
infof(conn->data, "Sent QUIC client Initial\n");
return CURLE_OK;
}
CURLcode Curl_quic_is_connected(struct connectdata *conn, int sockindex,
bool *done)
{
CURLcode result;
struct quicsocket *qs = &conn->quic;
curl_socket_t sockfd = conn->sock[sockindex];
result = process_ingress(conn, sockfd);
if(result)
return result;
result = flush_egress(conn, sockfd);
if(result)
return result;
if(quiche_conn_is_established(qs->conn)) {
conn->recv[sockindex] = quic_stream_recv;
conn->send[sockindex] = quic_stream_send;
*done = TRUE;
}
return CURLE_OK;
}
static CURLcode process_ingress(struct connectdata *conn, int sockfd)
{
ssize_t recvd;
struct quicsocket *qs = &conn->quic;
static uint8_t buf[65535];
do {
recvd = recv(sockfd, buf, sizeof(buf), 0);
if((recvd < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK)))
break;
if(recvd < 0) {
failf(conn->data, "quiche: recv() unexpectedly returned %d", recvd);
return CURLE_RECV_ERROR;
}
recvd = quiche_conn_recv(qs->conn, buf, recvd);
if(recvd == QUICHE_ERR_DONE)
break;
if(recvd < 0) {
failf(conn->data, "quiche_conn_recv() == %d", recvd);
return CURLE_RECV_ERROR;
}
} while(1);
return CURLE_OK;
}
static CURLcode flush_egress(struct connectdata *conn, int sockfd)
{
ssize_t sent;
struct quicsocket *qs = &conn->quic;
static uint8_t out[1200];
do {
sent = quiche_conn_send(qs->conn, out, sizeof(out));
if(sent == QUICHE_ERR_DONE)
break;
if(sent < 0)
return CURLE_SEND_ERROR;
sent = send(sockfd, out, sent, 0);
if(sent < 0)
return CURLE_SEND_ERROR;
} while(1);
return CURLE_OK;
}
static ssize_t quic_stream_recv(struct connectdata *conn,
int sockindex,
char *buf,
size_t buffersize,
CURLcode *curlcode)
{
bool fin;
ssize_t recvd;
struct quicsocket *qs = &conn->quic;
curl_socket_t sockfd = conn->sock[sockindex];
if(process_ingress(conn, sockfd)) {
*curlcode = CURLE_RECV_ERROR;
return -1;
}
recvd = quiche_conn_stream_recv(qs->conn, 0, (uint8_t *) buf, buffersize, &fin);
if(recvd == QUICHE_ERR_DONE) {
*curlcode = CURLE_AGAIN;
return -1;
}
if(recvd < 0) {
*curlcode = CURLE_RECV_ERROR;
return -1;
}
*curlcode = CURLE_OK;
return recvd;
}
static ssize_t quic_stream_send(struct connectdata *conn,
int sockindex,
const void *mem,
size_t len,
CURLcode *curlcode)
{
ssize_t sent;
struct quicsocket *qs = &conn->quic;
curl_socket_t sockfd = conn->sock[sockindex];
sent = quiche_conn_stream_send(qs->conn, 0, mem, len, true);
if(sent < 0) {
*curlcode = CURLE_SEND_ERROR;
return -1;
}
if(flush_egress(conn, sockfd)) {
*curlcode = CURLE_SEND_ERROR;
return -1;
}
*curlcode = CURLE_OK;
return sent;
}
/*
* Store quiche version info in this buffer, Prefix with a space. Return total
* length written.
*/
int Curl_quic_ver(char *p, size_t len)
{
return msnprintf(p, len, " quiche");
}
#endif
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