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nghttpx: Send stateless reset

This commit is contained in:
Tatsuhiro Tsujikawa 2021-08-17 21:48:11 +09:00
parent 48bb1ebe01
commit 9b2982510e
2 changed files with 55 additions and 0 deletions
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52
src/shrpx_quic_connection_handler.cc
View File

@ -92,6 +92,8 @@ int QUICConnectionHandler::handle_packet(const UpstreamAddr *faddr,
remote_addr, local_addr);
return 0;
default:
// TODO Must be rate limited
send_stateless_reset(faddr, dcid, dcidlen, remote_addr, local_addr);
return 0;
}
@ -217,6 +219,56 @@ int QUICConnectionHandler::send_version_negotiation(
0);
}
int QUICConnectionHandler::send_stateless_reset(const UpstreamAddr *faddr,
const uint8_t *dcid,
size_t dcidlen,
const Address &remote_addr,
const Address &local_addr) {
int rv;
std::array<uint8_t, NGTCP2_STATELESS_RESET_TOKENLEN> token;
ngtcp2_cid cid;
ngtcp2_cid_init(&cid, dcid, dcidlen);
auto config = get_config();
auto &quicconf = config->quic;
auto &stateless_resetconf = quicconf.stateless_reset;
rv = generate_quic_stateless_reset_token(token.data(), &cid,
stateless_resetconf.secret.data(),
stateless_resetconf.secret.size());
if (rv != 0) {
return -1;
}
std::array<uint8_t, NGTCP2_MIN_STATELESS_RESET_RANDLEN> rand_bytes;
if (RAND_bytes(rand_bytes.data(), rand_bytes.size()) != 1) {
return -1;
}
std::array<uint8_t, 1280> buf;
auto nwrite =
ngtcp2_pkt_write_stateless_reset(buf.data(), buf.size(), token.data(),
rand_bytes.data(), rand_bytes.size());
if (nwrite < 0) {
LOG(ERROR) << "ngtcp2_pkt_write_stateless_reset: "
<< ngtcp2_strerror(nwrite);
return -1;
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Send stateless_reset to remote="
<< util::to_numeric_addr(&remote_addr)
<< " dcid=" << util::format_hex(dcid, dcidlen);
}
return quic_send_packet(faddr, &remote_addr.su.sa, remote_addr.len,
&local_addr.su.sa, local_addr.len, buf.data(), nwrite,
0);
}
void QUICConnectionHandler::add_connection_id(const ngtcp2_cid *cid,
ClientHandler *handler) {
auto key = make_cid_key(cid);

3
src/shrpx_quic_connection_handler.h
View File

@ -55,6 +55,9 @@ public:
const uint8_t *scid, size_t scidlen,
const Address &remote_addr,
const Address &local_addr);
int send_stateless_reset(const UpstreamAddr *faddr, const uint8_t *dcid,
size_t dcidlen, const Address &remote_addr,
const Address &local_addr);
ClientHandler *handle_new_connection(const UpstreamAddr *faddr,
const Address &remote_addr,
const Address &local_addr,