401 lines
11 KiB
C
401 lines
11 KiB
C
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include "urldata.h"
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#include "dynbuf.h"
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#include "cfilters.h"
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#include "curl_log.h"
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#include "curl_msh3.h"
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#include "curl_ngtcp2.h"
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#include "curl_quiche.h"
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#include "vquic.h"
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#include "vquic_int.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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#ifdef ENABLE_QUIC
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#ifdef O_BINARY
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#define QLOGMODE O_WRONLY|O_CREAT|O_BINARY
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#else
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#define QLOGMODE O_WRONLY|O_CREAT
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#endif
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void Curl_quic_ver(char *p, size_t len)
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{
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#ifdef USE_NGTCP2
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Curl_ngtcp2_ver(p, len);
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#elif defined(USE_QUICHE)
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Curl_quiche_ver(p, len);
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#elif defined(USE_MSH3)
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Curl_msh3_ver(p, len);
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#endif
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}
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CURLcode vquic_ctx_init(struct cf_quic_ctx *qctx, size_t pktbuflen)
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{
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qctx->num_blocked_pkt = 0;
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qctx->num_blocked_pkt_sent = 0;
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memset(&qctx->blocked_pkt, 0, sizeof(qctx->blocked_pkt));
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qctx->pktbuflen = pktbuflen;
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qctx->pktbuf = malloc(qctx->pktbuflen);
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if(!qctx->pktbuf)
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return CURLE_OUT_OF_MEMORY;
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#if defined(__linux__) && defined(UDP_SEGMENT) && defined(HAVE_SENDMSG)
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qctx->no_gso = FALSE;
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#else
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qctx->no_gso = TRUE;
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#endif
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return CURLE_OK;
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}
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void vquic_ctx_free(struct cf_quic_ctx *qctx)
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{
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free(qctx->pktbuf);
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qctx->pktbuf = NULL;
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}
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static CURLcode send_packet_no_gso(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct cf_quic_ctx *qctx,
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const uint8_t *pkt, size_t pktlen,
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size_t gsolen, size_t *psent);
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static CURLcode do_sendmsg(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct cf_quic_ctx *qctx,
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const uint8_t *pkt, size_t pktlen, size_t gsolen,
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size_t *psent)
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{
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#ifdef HAVE_SENDMSG
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struct iovec msg_iov;
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struct msghdr msg = {0};
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ssize_t sent;
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#if defined(__linux__) && defined(UDP_SEGMENT)
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uint8_t msg_ctrl[32];
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struct cmsghdr *cm;
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#endif
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*psent = 0;
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msg_iov.iov_base = (uint8_t *)pkt;
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msg_iov.iov_len = pktlen;
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msg.msg_iov = &msg_iov;
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msg.msg_iovlen = 1;
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#if defined(__linux__) && defined(UDP_SEGMENT)
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if(pktlen > gsolen) {
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/* Only set this, when we need it. macOS, for example,
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* does not seem to like a msg_control of length 0. */
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msg.msg_control = msg_ctrl;
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assert(sizeof(msg_ctrl) >= CMSG_SPACE(sizeof(uint16_t)));
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msg.msg_controllen = CMSG_SPACE(sizeof(uint16_t));
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cm = CMSG_FIRSTHDR(&msg);
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cm->cmsg_level = SOL_UDP;
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cm->cmsg_type = UDP_SEGMENT;
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cm->cmsg_len = CMSG_LEN(sizeof(uint16_t));
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*(uint16_t *)(void *)CMSG_DATA(cm) = gsolen & 0xffff;
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}
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#endif
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while((sent = sendmsg(qctx->sockfd, &msg, 0)) == -1 && SOCKERRNO == EINTR)
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;
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if(sent == -1) {
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switch(SOCKERRNO) {
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case EAGAIN:
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#if EAGAIN != EWOULDBLOCK
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case EWOULDBLOCK:
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#endif
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return CURLE_AGAIN;
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case EMSGSIZE:
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/* UDP datagram is too large; caused by PMTUD. Just let it be lost. */
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break;
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case EIO:
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if(pktlen > gsolen) {
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/* GSO failure */
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failf(data, "sendmsg() returned %zd (errno %d); disable GSO", sent,
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SOCKERRNO);
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qctx->no_gso = TRUE;
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return send_packet_no_gso(cf, data, qctx, pkt, pktlen, gsolen, psent);
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}
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/* FALLTHROUGH */
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default:
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failf(data, "sendmsg() returned %zd (errno %d)", sent, SOCKERRNO);
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return CURLE_SEND_ERROR;
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}
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}
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else {
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assert(pktlen == (size_t)sent);
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}
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#else
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ssize_t sent;
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(void)gsolen;
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*psent = 0;
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while((sent = send(qctx->sockfd,
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(const char *)pkt, (SEND_TYPE_ARG3)pktlen, 0)) == -1 &&
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SOCKERRNO == EINTR)
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;
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if(sent == -1) {
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if(SOCKERRNO == EAGAIN || SOCKERRNO == EWOULDBLOCK) {
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return CURLE_AGAIN;
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}
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else {
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failf(data, "send() returned %zd (errno %d)", sent, SOCKERRNO);
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if(SOCKERRNO != EMSGSIZE) {
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return CURLE_SEND_ERROR;
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}
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/* UDP datagram is too large; caused by PMTUD. Just let it be
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lost. */
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}
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}
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#endif
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(void)cf;
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*psent = pktlen;
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return CURLE_OK;
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}
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static CURLcode send_packet_no_gso(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct cf_quic_ctx *qctx,
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const uint8_t *pkt, size_t pktlen,
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size_t gsolen, size_t *psent)
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{
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const uint8_t *p, *end = pkt + pktlen;
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size_t sent;
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*psent = 0;
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for(p = pkt; p < end; p += gsolen) {
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size_t len = CURLMIN(gsolen, (size_t)(end - p));
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CURLcode curlcode = do_sendmsg(cf, data, qctx, p, len, len, &sent);
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if(curlcode != CURLE_OK) {
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return curlcode;
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}
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*psent += sent;
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}
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return CURLE_OK;
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}
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CURLcode vquic_send_packet(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct cf_quic_ctx *qctx,
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const uint8_t *pkt, size_t pktlen, size_t gsolen,
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size_t *psent)
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{
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if(qctx->no_gso && pktlen > gsolen) {
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return send_packet_no_gso(cf, data, qctx, pkt, pktlen, gsolen, psent);
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}
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return do_sendmsg(cf, data, qctx, pkt, pktlen, gsolen, psent);
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}
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void vquic_push_blocked_pkt(struct Curl_cfilter *cf,
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struct cf_quic_ctx *qctx,
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const uint8_t *pkt, size_t pktlen, size_t gsolen)
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{
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struct vquic_blocked_pkt *blkpkt;
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(void)cf;
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assert(qctx->num_blocked_pkt <
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sizeof(qctx->blocked_pkt) / sizeof(qctx->blocked_pkt[0]));
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blkpkt = &qctx->blocked_pkt[qctx->num_blocked_pkt++];
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blkpkt->pkt = pkt;
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blkpkt->pktlen = pktlen;
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blkpkt->gsolen = gsolen;
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}
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CURLcode vquic_send_blocked_pkt(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct cf_quic_ctx *qctx)
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{
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size_t sent;
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CURLcode curlcode;
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struct vquic_blocked_pkt *blkpkt;
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(void)cf;
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for(; qctx->num_blocked_pkt_sent < qctx->num_blocked_pkt;
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++qctx->num_blocked_pkt_sent) {
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blkpkt = &qctx->blocked_pkt[qctx->num_blocked_pkt_sent];
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curlcode = vquic_send_packet(cf, data, qctx, blkpkt->pkt,
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blkpkt->pktlen, blkpkt->gsolen, &sent);
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if(curlcode) {
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if(curlcode == CURLE_AGAIN) {
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blkpkt->pkt += sent;
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blkpkt->pktlen -= sent;
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}
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return curlcode;
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}
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}
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qctx->num_blocked_pkt = 0;
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qctx->num_blocked_pkt_sent = 0;
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return CURLE_OK;
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}
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/*
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* If the QLOGDIR environment variable is set, open and return a file
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* descriptor to write the log to.
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*
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* This function returns error if something failed outside of failing to
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* create the file. Open file success is deemed by seeing if the returned fd
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* is != -1.
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*/
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CURLcode Curl_qlogdir(struct Curl_easy *data,
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unsigned char *scid,
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size_t scidlen,
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int *qlogfdp)
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{
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const char *qlog_dir = getenv("QLOGDIR");
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*qlogfdp = -1;
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if(qlog_dir) {
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struct dynbuf fname;
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CURLcode result;
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unsigned int i;
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Curl_dyn_init(&fname, DYN_QLOG_NAME);
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result = Curl_dyn_add(&fname, qlog_dir);
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if(!result)
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result = Curl_dyn_add(&fname, "/");
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for(i = 0; (i < scidlen) && !result; i++) {
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char hex[3];
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msnprintf(hex, 3, "%02x", scid[i]);
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result = Curl_dyn_add(&fname, hex);
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}
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if(!result)
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result = Curl_dyn_add(&fname, ".sqlog");
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if(!result) {
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int qlogfd = open(Curl_dyn_ptr(&fname), QLOGMODE,
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data->set.new_file_perms);
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if(qlogfd != -1)
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*qlogfdp = qlogfd;
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}
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Curl_dyn_free(&fname);
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if(result)
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return result;
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}
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return CURLE_OK;
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}
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CURLcode Curl_cf_quic_create(struct Curl_cfilter **pcf,
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struct Curl_easy *data,
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struct connectdata *conn,
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const struct Curl_addrinfo *ai,
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int transport)
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{
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(void)transport;
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DEBUGASSERT(transport == TRNSPRT_QUIC);
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#ifdef USE_NGTCP2
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return Curl_cf_ngtcp2_create(pcf, data, conn, ai);
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#elif defined(USE_QUICHE)
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return Curl_cf_quiche_create(pcf, data, conn, ai);
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#elif defined(USE_MSH3)
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return Curl_cf_msh3_create(pcf, data, conn, ai);
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#else
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*pcf = NULL;
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(void)data;
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(void)conn;
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(void)ai;
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return CURLE_NOT_BUILT_IN;
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#endif
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}
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bool Curl_conn_is_http3(const struct Curl_easy *data,
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const struct connectdata *conn,
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int sockindex)
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{
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#ifdef USE_NGTCP2
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return Curl_conn_is_ngtcp2(data, conn, sockindex);
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#elif defined(USE_QUICHE)
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return Curl_conn_is_quiche(data, conn, sockindex);
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#elif defined(USE_MSH3)
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return Curl_conn_is_msh3(data, conn, sockindex);
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#else
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return ((conn->handler->protocol & PROTO_FAMILY_HTTP) &&
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(conn->httpversion == 30));
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#endif
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}
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CURLcode Curl_conn_may_http3(struct Curl_easy *data,
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|
const struct connectdata *conn)
|
||
|
|
{
|
||
|
|
if(conn->transport == TRNSPRT_UNIX) {
|
||
|
|
/* cannot do QUIC over a unix domain socket */
|
||
|
|
return CURLE_QUIC_CONNECT_ERROR;
|
||
|
|
}
|
||
|
|
if(!(conn->handler->flags & PROTOPT_SSL)) {
|
||
|
|
failf(data, "HTTP/3 requested for non-HTTPS URL");
|
||
|
|
return CURLE_URL_MALFORMAT;
|
||
|
|
}
|
||
|
|
#ifndef CURL_DISABLE_PROXY
|
||
|
|
if(conn->bits.socksproxy) {
|
||
|
|
failf(data, "HTTP/3 is not supported over a SOCKS proxy");
|
||
|
|
return CURLE_URL_MALFORMAT;
|
||
|
|
}
|
||
|
|
if(conn->bits.httpproxy && conn->bits.tunnel_proxy) {
|
||
|
|
failf(data, "HTTP/3 is not supported over a HTTP proxy");
|
||
|
|
return CURLE_URL_MALFORMAT;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return CURLE_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /* ENABLE_QUIC */
|
||
|
|
|
||
|
|
CURLcode Curl_conn_may_http3(struct Curl_easy *data,
|
||
|
|
const struct connectdata *conn)
|
||
|
|
{
|
||
|
|
(void)conn;
|
||
|
|
(void)data;
|
||
|
|
DEBUGF(infof(data, "QUIC is not supported in this build"));
|
||
|
|
return CURLE_NOT_BUILT_IN;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !ENABLE_QUIC */
|