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/*
* ngtcp2
*
* Copyright (c) 2017 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SERVER_H
#define SERVER_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif // HAVE_CONFIG_H
#include <vector>
#include <unordered_map>
#include <string>
#include <deque>
#include <string_view>
#include <memory>
#include <ngtcp2/ngtcp2.h>
#include <ngtcp2/ngtcp2_crypto.h>
#include <nghttp3/nghttp3.h>
#include <ev.h>
#include "server_base.h"
#include "tls_server_context.h"
#include "network.h"
#include "shared.h"
using namespace ngtcp2;
struct HTTPHeader {
HTTPHeader(const std::string_view &name, const std::string_view &value)
: name(name), value(value) {}
std::string_view name;
std::string_view value;
};
class Handler;
struct FileEntry;
struct Stream {
Stream(int64_t stream_id, Handler *handler);
int start_response(nghttp3_conn *conn);
std::pair<FileEntry, int> open_file(const std::string &path);
void map_file(const FileEntry &fe);
int send_status_response(nghttp3_conn *conn, unsigned int status_code,
const std::vector<HTTPHeader> &extra_headers = {});
int send_redirect_response(nghttp3_conn *conn, unsigned int status_code,
const std::string_view &path);
int64_t find_dyn_length(const std::string_view &path);
void http_acked_stream_data(uint64_t datalen);
int64_t stream_id;
Handler *handler;
// uri is request uri/path.
std::string uri;
std::string method;
std::string authority;
std::string status_resp_body;
// data is a pointer to the memory which maps file denoted by fd.
uint8_t *data;
// datalen is the length of mapped file by data.
uint64_t datalen;
// dynresp is true if dynamic data response is enabled.
bool dynresp;
// dyndataleft is the number of dynamic data left to send.
uint64_t dyndataleft;
// dynbuflen is the number of bytes in-flight.
uint64_t dynbuflen;
};
class Server;
// Endpoint is a local endpoint.
struct Endpoint {
Address addr;
ev_io rev;
Server *server;
int fd;
// ecn is the last ECN bits set to fd.
unsigned int ecn;
};
class Handler : public HandlerBase {
public:
Handler(struct ev_loop *loop, Server *server);
~Handler();
int init(const Endpoint &ep, const Address &local_addr, const sockaddr *sa,
socklen_t salen, const ngtcp2_cid *dcid, const ngtcp2_cid *scid,
const ngtcp2_cid *ocid, const uint8_t *token, size_t tokenlen,
uint32_t version, TLSServerContext &tls_ctx);
int on_read(const Endpoint &ep, const Address &local_addr, const sockaddr *sa,
socklen_t salen, const ngtcp2_pkt_info *pi, uint8_t *data,
size_t datalen);
int on_write();
int write_streams();
int feed_data(const Endpoint &ep, const Address &local_addr,
const sockaddr *sa, socklen_t salen, const ngtcp2_pkt_info *pi,
uint8_t *data, size_t datalen);
void update_timer();
int handle_expiry();
void signal_write();
int handshake_completed();
Server *server() const;
int recv_stream_data(uint32_t flags, int64_t stream_id, const uint8_t *data,
size_t datalen);
int acked_stream_data_offset(int64_t stream_id, uint64_t datalen);
uint32_t version() const;
void on_stream_open(int64_t stream_id);
int on_stream_close(int64_t stream_id, uint64_t app_error_code);
void start_draining_period();
int start_closing_period();
int handle_error();
int send_conn_close();
int update_key(uint8_t *rx_secret, uint8_t *tx_secret,
ngtcp2_crypto_aead_ctx *rx_aead_ctx, uint8_t *rx_iv,
ngtcp2_crypto_aead_ctx *tx_aead_ctx, uint8_t *tx_iv,
const uint8_t *current_rx_secret,
const uint8_t *current_tx_secret, size_t secretlen);
int setup_httpconn();
void http_consume(int64_t stream_id, size_t nconsumed);
void extend_max_remote_streams_bidi(uint64_t max_streams);
Stream *find_stream(int64_t stream_id);
void http_begin_request_headers(int64_t stream_id);
void http_recv_request_header(Stream *stream, int32_t token,
nghttp3_rcbuf *name, nghttp3_rcbuf *value);
int http_end_request_headers(Stream *stream);
int http_end_stream(Stream *stream);
int start_response(Stream *stream);
int on_stream_reset(int64_t stream_id);
int on_stream_stop_sending(int64_t stream_id);
int extend_max_stream_data(int64_t stream_id, uint64_t max_data);
void shutdown_read(int64_t stream_id, int app_error_code);
void http_acked_stream_data(Stream *stream, uint64_t datalen);
void http_stream_close(int64_t stream_id, uint64_t app_error_code);
int http_stop_sending(int64_t stream_id, uint64_t app_error_code);
int http_reset_stream(int64_t stream_id, uint64_t app_error_code);
void write_qlog(const void *data, size_t datalen);
void on_send_blocked(Endpoint &ep, const ngtcp2_addr &local_addr,
const ngtcp2_addr &remote_addr, unsigned int ecn,
const uint8_t *data, size_t datalen, size_t gso_size);
void start_wev_endpoint(const Endpoint &ep);
int send_blocked_packet();
private:
struct ev_loop *loop_;
Server *server_;
ev_io wev_;
ev_timer timer_;
FILE *qlog_;
ngtcp2_cid scid_;
nghttp3_conn *httpconn_;
std::unordered_map<int64_t, std::unique_ptr<Stream>> streams_;
// conn_closebuf_ contains a packet which contains CONNECTION_CLOSE.
// This packet is repeatedly sent as a response to the incoming
// packet in draining period.
std::unique_ptr<Buffer> conn_closebuf_;
// nkey_update_ is the number of key update occurred.
size_t nkey_update_;
bool no_gso_;
struct {
bool send_blocked;
size_t num_blocked;
size_t num_blocked_sent;
// blocked field is effective only when send_blocked is true.
struct {
Endpoint *endpoint;
Address local_addr;
Address remote_addr;
unsigned int ecn;
const uint8_t *data;
size_t datalen;
size_t gso_size;
} blocked[2];
std::unique_ptr<uint8_t[]> data;
} tx_;
};
class Server {
public:
Server(struct ev_loop *loop, TLSServerContext &tls_ctx);
~Server();
int init(const char *addr, const char *port);
void disconnect();
void close();
int on_read(Endpoint &ep);
int send_version_negotiation(uint32_t version, const uint8_t *dcid,
size_t dcidlen, const uint8_t *scid,
size_t scidlen, Endpoint &ep,
const Address &local_addr, const sockaddr *sa,
socklen_t salen);
int send_retry(const ngtcp2_pkt_hd *chd, Endpoint &ep,
const Address &local_addr, const sockaddr *sa, socklen_t salen,
size_t max_pktlen);
int send_stateless_connection_close(const ngtcp2_pkt_hd *chd, Endpoint &ep,
const Address &local_addr,
const sockaddr *sa, socklen_t salen);
int verify_retry_token(ngtcp2_cid *ocid, const ngtcp2_pkt_hd *hd,
const sockaddr *sa, socklen_t salen);
int verify_token(const ngtcp2_pkt_hd *hd, const sockaddr *sa,
socklen_t salen);
int send_packet(Endpoint &ep, const ngtcp2_addr &local_addr,
const ngtcp2_addr &remote_addr, unsigned int ecn,
const uint8_t *data, size_t datalen);
std::pair<size_t, int> send_packet(Endpoint &ep, bool &no_gso,
const ngtcp2_addr &local_addr,
const ngtcp2_addr &remote_addr,
unsigned int ecn, const uint8_t *data,
size_t datalen, size_t gso_size);
void remove(const Handler *h);
void associate_cid(const ngtcp2_cid *cid, Handler *h);
void dissociate_cid(const ngtcp2_cid *cid);
private:
std::unordered_map<std::string, Handler *> handlers_;
struct ev_loop *loop_;
std::vector<Endpoint> endpoints_;
TLSServerContext &tls_ctx_;
ev_signal sigintev_;
};
#endif // SERVER_H
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