2021-08-15 05:22:10 +02:00
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/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2021 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "shrpx_quic.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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2021-08-16 12:48:12 +02:00
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#include <netinet/udp.h>
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2021-08-15 05:22:10 +02:00
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#include <array>
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2021-08-16 08:11:18 +02:00
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#include <chrono>
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#include <ngtcp2/ngtcp2_crypto.h>
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#include <nghttp3/nghttp3.h>
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#include <openssl/rand.h>
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2021-08-15 05:22:10 +02:00
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#include "shrpx_config.h"
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#include "shrpx_log.h"
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#include "util.h"
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#include "xsi_strerror.h"
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using namespace nghttp2;
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namespace shrpx {
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2021-08-16 08:11:18 +02:00
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ngtcp2_tstamp quic_timestamp() {
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return std::chrono::duration_cast<std::chrono::nanoseconds>(
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std::chrono::steady_clock::now().time_since_epoch())
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.count();
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}
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2021-08-16 12:48:12 +02:00
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int quic_send_packet(const UpstreamAddr *faddr, const sockaddr *remote_sa,
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2021-08-15 14:36:43 +02:00
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size_t remote_salen, const sockaddr *local_sa,
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size_t local_salen, const uint8_t *data, size_t datalen,
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size_t gso_size) {
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2021-08-16 12:48:12 +02:00
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iovec msg_iov = {const_cast<uint8_t *>(data), datalen};
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msghdr msg{};
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msg.msg_name = const_cast<sockaddr *>(remote_sa);
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msg.msg_namelen = remote_salen;
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msg.msg_iov = &msg_iov;
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msg.msg_iovlen = 1;
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2021-08-22 12:01:30 +02:00
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uint8_t msg_ctrl[
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#ifdef UDP_SEGMENT
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CMSG_SPACE(sizeof(uint16_t)) +
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#endif // UDP_SEGMENT
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CMSG_SPACE(sizeof(in6_pktinfo))];
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2021-08-16 12:48:12 +02:00
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memset(msg_ctrl, 0, sizeof(msg_ctrl));
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msg.msg_control = msg_ctrl;
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msg.msg_controllen = sizeof(msg_ctrl);
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size_t controllen = 0;
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auto cm = CMSG_FIRSTHDR(&msg);
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switch (local_sa->sa_family) {
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case AF_INET: {
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controllen += CMSG_SPACE(sizeof(in_pktinfo));
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cm->cmsg_level = IPPROTO_IP;
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cm->cmsg_type = IP_PKTINFO;
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cm->cmsg_len = CMSG_LEN(sizeof(in_pktinfo));
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auto pktinfo = reinterpret_cast<in_pktinfo *>(CMSG_DATA(cm));
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memset(pktinfo, 0, sizeof(in_pktinfo));
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auto addrin =
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reinterpret_cast<sockaddr_in *>(const_cast<sockaddr *>(local_sa));
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pktinfo->ipi_spec_dst = addrin->sin_addr;
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break;
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}
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case AF_INET6: {
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controllen += CMSG_SPACE(sizeof(in6_pktinfo));
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cm->cmsg_level = IPPROTO_IPV6;
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cm->cmsg_type = IPV6_PKTINFO;
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cm->cmsg_len = CMSG_LEN(sizeof(in6_pktinfo));
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auto pktinfo = reinterpret_cast<in6_pktinfo *>(CMSG_DATA(cm));
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memset(pktinfo, 0, sizeof(in6_pktinfo));
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auto addrin =
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reinterpret_cast<sockaddr_in6 *>(const_cast<sockaddr *>(local_sa));
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pktinfo->ipi6_addr = addrin->sin6_addr;
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break;
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}
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default:
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assert(0);
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}
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2021-08-22 12:01:30 +02:00
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#ifdef UDP_SEGMENT
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2021-08-16 12:48:12 +02:00
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if (gso_size && datalen > gso_size) {
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controllen += CMSG_SPACE(sizeof(uint16_t));
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cm = CMSG_NXTHDR(&msg, cm);
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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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*(reinterpret_cast<uint16_t *>(CMSG_DATA(cm))) = gso_size;
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}
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2021-08-22 12:01:30 +02:00
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#endif // UDP_SEGMENT
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2021-08-16 12:48:12 +02:00
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msg.msg_controllen = controllen;
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ssize_t nwrite;
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do {
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nwrite = sendmsg(faddr->fd, &msg, 0);
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} while (nwrite == -1 && errno == EINTR);
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if (nwrite == -1) {
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return -1;
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}
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if (LOG_ENABLED(INFO)) {
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LOG(INFO) << "QUIC sent packet: local="
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<< util::to_numeric_addr(local_sa, local_salen)
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<< " remote=" << util::to_numeric_addr(remote_sa, remote_salen)
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<< " " << nwrite << " bytes";
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}
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2021-08-15 14:36:43 +02:00
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return 0;
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}
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2021-08-16 08:11:18 +02:00
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int generate_quic_connection_id(ngtcp2_cid *cid, size_t cidlen) {
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if (RAND_bytes(cid->data, cidlen) != 1) {
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return -1;
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}
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cid->datalen = cidlen;
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return 0;
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}
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2021-08-23 14:40:24 +02:00
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int generate_quic_connection_id(ngtcp2_cid *cid, size_t cidlen,
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const uint8_t *cid_prefix) {
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assert(cidlen > SHRPX_QUIC_CID_PREFIXLEN);
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auto p = std::copy_n(cid_prefix, SHRPX_QUIC_CID_PREFIXLEN, cid->data);
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if (RAND_bytes(p, cidlen - SHRPX_QUIC_CID_PREFIXLEN) != 1) {
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return -1;
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}
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cid->datalen = cidlen;
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return 0;
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}
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2021-08-16 08:11:18 +02:00
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int generate_quic_stateless_reset_token(uint8_t *token, const ngtcp2_cid *cid,
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const uint8_t *secret,
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size_t secretlen) {
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ngtcp2_crypto_md md;
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ngtcp2_crypto_md_init(&md, const_cast<EVP_MD *>(EVP_sha256()));
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if (ngtcp2_crypto_generate_stateless_reset_token(token, &md, secret,
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secretlen, cid) != 0) {
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return -1;
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}
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return 0;
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}
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2021-08-26 07:46:34 +02:00
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int generate_quic_stateless_reset_secret(uint8_t *secret) {
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return RAND_bytes(secret, SHRPX_QUIC_STATELESS_RESET_SECRETLEN) == 1;
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}
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int generate_quic_token_secret(uint8_t *secret) {
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return RAND_bytes(secret, SHRPX_QUIC_TOKEN_SECRETLEN) == 1;
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}
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2021-08-15 05:22:10 +02:00
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} // namespace shrpx
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