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/*
* nghttp2 - HTTP/2.0 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* 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.
*/
#include "shrpx.h"
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netdb.h>
#include <signal.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <getopt.h>
#include <syslog.h>
#include <limits>
#include <cstdlib>
#include <iostream>
#include <fstream>
#include <vector>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <event2/listener.h>
#include <nghttp2/nghttp2.h>
#include "shrpx_config.h"
#include "shrpx_listen_handler.h"
#include "shrpx_ssl.h"
#include "util.h"
using namespace nghttp2;
namespace shrpx {
namespace {
void ssl_acceptcb(evconnlistener *listener, int fd,
sockaddr *addr, int addrlen, void *arg)
{
auto handler = static_cast<ListenHandler*>(arg);
handler->accept_connection(fd, addr, addrlen);
}
} // namespace
namespace {
bool is_ipv6_numeric_addr(const char *host)
{
uint8_t dst[16];
return inet_pton(AF_INET6, host, dst) == 1;
}
} // namespace
namespace {
int resolve_hostname(sockaddr_union *addr, size_t *addrlen,
const char *hostname, uint16_t port, int family)
{
addrinfo hints;
int rv;
char service[10];
snprintf(service, sizeof(service), "%u", port);
memset(&hints, 0, sizeof(addrinfo));
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
#ifdef AI_ADDRCONFIG
hints.ai_flags |= AI_ADDRCONFIG;
#endif // AI_ADDRCONFIG
addrinfo *res;
rv = getaddrinfo(hostname, service, &hints, &res);
if(rv != 0) {
LOG(FATAL) << "Unable to resolve address for " << hostname
<< ": " << gai_strerror(rv);
return -1;
}
char host[NI_MAXHOST];
rv = getnameinfo(res->ai_addr, res->ai_addrlen, host, sizeof(host),
0, 0, NI_NUMERICHOST);
if(rv == 0) {
if(LOG_ENABLED(INFO)) {
LOG(INFO) << "Address resolution for " << hostname << " succeeded: "
<< host;
}
} else {
LOG(FATAL) << "Address resolution for " << hostname << " failed: "
<< gai_strerror(rv);
return -1;
}
memcpy(addr, res->ai_addr, res->ai_addrlen);
*addrlen = res->ai_addrlen;
freeaddrinfo(res);
return 0;
}
} // namespace
namespace {
void evlistener_errorcb(evconnlistener *listener, void *ptr)
{
LOG(ERROR) << "Accepting incoming connection failed";
}
} // namespace
namespace {
evconnlistener* create_evlistener(ListenHandler *handler, int family)
{
// TODO Listen both IPv4 and IPv6
addrinfo hints;
int fd = -1;
int r;
char service[10];
snprintf(service, sizeof(service), "%u", get_config()->port);
memset(&hints, 0, sizeof(addrinfo));
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
#ifdef AI_ADDRCONFIG
hints.ai_flags |= AI_ADDRCONFIG;
#endif // AI_ADDRCONFIG
addrinfo *res, *rp;
r = getaddrinfo(get_config()->host, service, &hints, &res);
if(r != 0) {
if(LOG_ENABLED(INFO)) {
LOG(INFO) << "Unable to get IPv" << (family == AF_INET ? "4" : "6")
<< " address for " << get_config()->host << ": "
<< gai_strerror(r);
}
return NULL;
}
for(rp = res; rp; rp = rp->ai_next) {
fd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if(fd == -1) {
continue;
}
int val = 1;
if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val,
static_cast<socklen_t>(sizeof(val))) == -1) {
close(fd);
continue;
}
evutil_make_socket_nonblocking(fd);
#ifdef IPV6_V6ONLY
if(family == AF_INET6) {
if(setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &val,
static_cast<socklen_t>(sizeof(val))) == -1) {
close(fd);
continue;
}
}
#endif // IPV6_V6ONLY
if(bind(fd, rp->ai_addr, rp->ai_addrlen) == 0) {
break;
}
close(fd);
}
if(rp) {
char host[NI_MAXHOST];
r = getnameinfo(rp->ai_addr, rp->ai_addrlen, host, sizeof(host),
0, 0, NI_NUMERICHOST);
if(r == 0) {
if(LOG_ENABLED(INFO)) {
LOG(INFO) << "Listening on " << host << ", port "
<< get_config()->port;
}
} else {
LOG(FATAL) << gai_strerror(r);
DIE();
}
}
freeaddrinfo(res);
if(rp == 0) {
if(LOG_ENABLED(INFO)) {
LOG(INFO) << "Listening " << (family == AF_INET ? "IPv4" : "IPv6")
<< " socket failed";
}
return 0;
}
auto evlistener = evconnlistener_new
(handler->get_evbase(),
ssl_acceptcb,
handler,
LEV_OPT_REUSEABLE | LEV_OPT_CLOSE_ON_FREE,
get_config()->backlog,
fd);
evconnlistener_set_error_cb(evlistener, evlistener_errorcb);
return evlistener;
}
} // namespace
namespace {
void drop_privileges()
{
if(getuid() == 0 && get_config()->uid != 0) {
if(setgid(get_config()->gid) != 0) {
LOG(FATAL) << "Could not change gid: " << strerror(errno);
exit(EXIT_FAILURE);
}
if(setuid(get_config()->uid) != 0) {
LOG(FATAL) << "Could not change uid: " << strerror(errno);
exit(EXIT_FAILURE);
}
if(setuid(0) != -1) {
LOG(FATAL) << "Still have root privileges?";
exit(EXIT_FAILURE);
}
}
}
} // namespace
namespace {
void save_pid()
{
std::ofstream out(get_config()->pid_file, std::ios::binary);
out << getpid() << "\n";
out.close();
if(!out) {
LOG(ERROR) << "Could not save PID to file " << get_config()->pid_file;
exit(EXIT_FAILURE);
}
}
} // namespace
namespace {
int event_loop()
{
auto evbase = event_base_new();
if(!evbase) {
LOG(FATAL) << "event_base_new() failed";
exit(EXIT_FAILURE);
}
SSL_CTX *sv_ssl_ctx, *cl_ssl_ctx;
if(get_config()->client_mode) {
sv_ssl_ctx = nullptr;
cl_ssl_ctx = get_config()->downstream_no_tls ?
nullptr : ssl::create_ssl_client_context();
} else {
sv_ssl_ctx = get_config()->upstream_no_tls ?
nullptr : get_config()->default_ssl_ctx;
cl_ssl_ctx = get_config()->http2_bridge &&
!get_config()->downstream_no_tls ?
ssl::create_ssl_client_context() : nullptr;
}
auto listener_handler = new ListenHandler(evbase, sv_ssl_ctx, cl_ssl_ctx);
if(get_config()->daemon) {
if(daemon(0, 0) == -1) {
LOG(FATAL) << "Failed to daemonize: " << strerror(errno);
exit(EXIT_FAILURE);
}
}
if(get_config()->pid_file) {
save_pid();
}
auto evlistener6 = create_evlistener(listener_handler, AF_INET6);
auto evlistener4 = create_evlistener(listener_handler, AF_INET);
if(!evlistener6 && !evlistener4) {
LOG(FATAL) << "Failed to listen on address "
<< get_config()->host << ", port " << get_config()->port;
exit(EXIT_FAILURE);
}
// ListenHandler loads private key, and we listen on a priveleged port.
// After that, we drop the root privileges if needed.
drop_privileges();
if(get_config()->num_worker > 1) {
listener_handler->create_worker_thread(get_config()->num_worker);
} else if(get_config()->downstream_proto == PROTO_HTTP2) {
listener_handler->create_http2_session();
}
if(LOG_ENABLED(INFO)) {
LOG(INFO) << "Entering event loop";
}
event_base_loop(evbase, 0);
if(evlistener4) {
evconnlistener_free(evlistener4);
}
if(evlistener6) {
evconnlistener_free(evlistener6);
}
return 0;
}
} // namespace
namespace {
// Returns true if regular file or symbolic link |path| exists.
bool conf_exists(const char *path)
{
struct stat buf;
int rv = stat(path, &buf);
return rv == 0 && (buf.st_mode & (S_IFREG | S_IFLNK));
}
} // namespace
namespace {
const char *DEFAULT_NPN_LIST = NGHTTP2_PROTO_VERSION_ID ","
#ifdef HAVE_SPDYLAY
"spdy/3.1,spdy/3,spdy/2,"
#endif // HAVE_SPDYLAY
"http/1.1";
} // namespace
namespace {
const char *DEFAULT_TLS_PROTO_LIST = "TLSv1.2,TLSv1.1,TLSv1.0";
} // namespace
namespace {
void fill_default_config()
{
memset(mod_config(), 0, sizeof(*mod_config()));
mod_config()->verbose = false;
mod_config()->daemon = false;
mod_config()->server_name = "nghttpx nghttp2/" NGHTTP2_VERSION;
set_config_str(&mod_config()->host, "0.0.0.0");
mod_config()->port = 3000;
mod_config()->private_key_file = 0;
mod_config()->private_key_passwd = 0;
mod_config()->cert_file = 0;
// Read timeout for HTTP2 upstream connection
mod_config()->http2_upstream_read_timeout.tv_sec = 180;
mod_config()->http2_upstream_read_timeout.tv_usec = 0;
// Read timeout for non-HTTP2 upstream connection
mod_config()->upstream_read_timeout.tv_sec = 180;
mod_config()->upstream_read_timeout.tv_usec = 0;
// Write timeout for HTTP2/non-HTTP2 upstream connection
mod_config()->upstream_write_timeout.tv_sec = 60;
mod_config()->upstream_write_timeout.tv_usec = 0;
// Read/Write timeouts for downstream connection
mod_config()->downstream_read_timeout.tv_sec = 900;
mod_config()->downstream_read_timeout.tv_usec = 0;
mod_config()->downstream_write_timeout.tv_sec = 60;
mod_config()->downstream_write_timeout.tv_usec = 0;
// Timeout for pooled (idle) connections
mod_config()->downstream_idle_read_timeout.tv_sec = 60;
// window bits for HTTP/2.0 and SPDY upstream/downstream connection
// per stream. 2**16-1 = 64KiB-1, which is HTTP/2.0 default. Please
// note that SPDY/3 default is 64KiB.
mod_config()->http2_upstream_window_bits = 16;
mod_config()->http2_downstream_window_bits = 16;
// HTTP/2.0 SPDY/3.1 has connection-level flow control. The default
// window size for HTTP/2 is 64KiB - 1. SPDY/3's default is 64KiB
mod_config()->http2_upstream_connection_window_bits = 16;
mod_config()->http2_downstream_connection_window_bits = 16;
mod_config()->upstream_no_tls = false;
mod_config()->downstream_no_tls = false;
set_config_str(&mod_config()->downstream_host, "127.0.0.1");
mod_config()->downstream_port = 80;
mod_config()->downstream_hostport = 0;
mod_config()->downstream_addrlen = 0;
mod_config()->num_worker = 1;
mod_config()->http2_max_concurrent_streams = 100;
mod_config()->add_x_forwarded_for = false;
mod_config()->no_via = false;
mod_config()->accesslog = false;
set_config_str(&mod_config()->conf_path, "/etc/nghttpx/nghttpx.conf");
mod_config()->syslog = false;
mod_config()->syslog_facility = LOG_DAEMON;
mod_config()->use_syslog = false;
// Default accept() backlog
mod_config()->backlog = -1;
mod_config()->ciphers = 0;
mod_config()->honor_cipher_order = false;
mod_config()->http2_proxy = false;
mod_config()->http2_bridge = false;
mod_config()->client_proxy = false;
mod_config()->client = false;
mod_config()->client_mode = false;
mod_config()->insecure = false;
mod_config()->cacert = 0;
mod_config()->pid_file = 0;
mod_config()->uid = 0;
mod_config()->gid = 0;
mod_config()->backend_ipv4 = false;
mod_config()->backend_ipv6 = false;
mod_config()->tty = isatty(fileno(stderr));
mod_config()->cert_tree = 0;
mod_config()->downstream_http_proxy_userinfo = 0;
mod_config()->downstream_http_proxy_host = 0;
mod_config()->downstream_http_proxy_port = 0;
mod_config()->downstream_http_proxy_addrlen = 0;
mod_config()->rate_limit_cfg = nullptr;
mod_config()->read_rate = 1024*1024;
mod_config()->read_burst = 4*1024*1024;
mod_config()->write_rate = 0;
mod_config()->write_burst = 0;
mod_config()->npn_list = nullptr;
mod_config()->verify_client = false;
mod_config()->verify_client_cacert = nullptr;
mod_config()->client_private_key_file = nullptr;
mod_config()->client_cert_file = nullptr;
mod_config()->http2_upstream_dump_request_header = nullptr;
mod_config()->http2_upstream_dump_response_header = nullptr;
mod_config()->http2_no_cookie_crumbling = false;
}
} // namespace
namespace {
size_t get_rate_limit(size_t rate_limit)
{
if(rate_limit == 0) {
return EV_RATE_LIMIT_MAX;
} else {
return rate_limit;
}
}
} // namespace
namespace {
void print_version(std::ostream& out)
{
out << get_config()->server_name << std::endl;
}
} // namespace
namespace {
void print_usage(std::ostream& out)
{
out << "Usage: nghttpx [-Dh] [-s|--client|-p] [-b <HOST,PORT>]\n"
<< " [-f <HOST,PORT>] [-n <CORES>] [-c <NUM>] [-L <LEVEL>]\n"
<< " [OPTIONS...] [<PRIVATE_KEY> <CERT>]\n"
<< "\n"
<< "A reverse proxy for HTTP/2, HTTP/1 and SPDY.\n"
<< std::endl;
}
} // namespace
namespace {
void print_help(std::ostream& out)
{
print_usage(out);
out << "Positional arguments:\n"
<< " <PRIVATE_KEY> Set path to server's private key. Required\n"
<< " unless -p, --client or --frontend-no-tls\n"
<< " are given.\n"
<< " <CERT> Set path to server's certificate. Required\n"
<< " unless -p, --client or --frontend-no-tls\n"
<< " are given.\n"
<< "\n"
<< "OPTIONS:\n"
<< "\n"
<< " Connections:\n"
<< " -b, --backend=<HOST,PORT>\n"
<< " Set backend host and port.\n"
<< " Default: '"
<< get_config()->downstream_host << ","
<< get_config()->downstream_port << "'\n"
<< " -f, --frontend=<HOST,PORT>\n"
<< " Set frontend host and port.\n"
<< " Default: '"
<< get_config()->host << "," << get_config()->port << "'\n"
<< " --backlog=<NUM> Set listen backlog size. If -1 is given,\n"
<< " libevent will choose suitable value.\n"
<< " Default: "
<< get_config()->backlog << "\n"
<< " --backend-ipv4 Resolve backend hostname to IPv4 address\n"
<< " only.\n"
<< " --backend-ipv6 Resolve backend hostname to IPv6 address\n"
<< " only.\n"
<< "\n"
<< " Performance:\n"
<< " -n, --workers=<CORES>\n"
<< " Set the number of worker threads.\n"
<< " Default: "
<< get_config()->num_worker << "\n"
<< " --read-rate=<RATE> Set maximum average read rate on frontend\n"
<< " connection. Setting 0 to this option means\n"
<< " read rate is unlimited.\n"
<< " Default: "
<< get_config()->read_rate << "\n"
<< " --read-burst=<SIZE>\n"
<< " Set maximum read burst size on frontend\n"
<< " connection. Setting 0 to this option means\n"
<< " read burst size is unlimited.\n"
<< " Default: "
<< get_config()->read_burst << "\n"
<< " --write-rate=<RATE>\n"
<< " Set maximum average write rate on frontend\n"
<< " connection. Setting 0 to this option means\n"
<< " write rate is unlimited.\n"
<< " Default: "
<< get_config()->write_rate << "\n"
<< " --write-burst=<SIZE>\n"
<< " Set maximum write burst size on frontend\n"
<< " connection. Setting 0 to this option means\n"
<< " write burst size is unlimited.\n"
<< " Default: "
<< get_config()->write_burst << "\n"
<< "\n"
<< " Timeout:\n"
<< " --frontend-http2-read-timeout=<SEC>\n"
<< " Specify read timeout for HTTP/2.0 and SPDY frontend\n"
<< " connection. Default: "
<< get_config()->http2_upstream_read_timeout.tv_sec << "\n"
<< " --frontend-read-timeout=<SEC>\n"
<< " Specify read timeout for HTTP/1.1 frontend\n"
<< " connection. Default: "
<< get_config()->upstream_read_timeout.tv_sec << "\n"
<< " --frontend-write-timeout=<SEC>\n"
<< " Specify write timeout for all frontends.\n"
<< " connection. Default: "
<< get_config()->upstream_write_timeout.tv_sec << "\n"
<< " --backend-read-timeout=<SEC>\n"
<< " Specify read timeout for backend connection.\n"
<< " Default: "
<< get_config()->downstream_read_timeout.tv_sec << "\n"
<< " --backend-write-timeout=<SEC>\n"
<< " Specify write timeout for backend\n"
<< " connection. Default: "
<< get_config()->downstream_write_timeout.tv_sec << "\n"
<< " --backend-keep-alive-timeout=<SEC>\n"
<< " Specify keep-alive timeout for backend\n"
<< " connection. Default: "
<< get_config()->downstream_idle_read_timeout.tv_sec << "\n"
<< " --backend-http-proxy-uri=<URI>\n"
<< " Specify proxy URI in the form\n"
<< " http://[<USER>:<PASS>@]<PROXY>:<PORT>. If\n"
<< " a proxy requires authentication, specify\n"
<< " <USER> and <PASS>. Note that they must be\n"
<< " properly percent-encoded. This proxy is used\n"
<< " when the backend connection is HTTP/2.0. First,\n"
<< " make a CONNECT request to the proxy and\n"
<< " it connects to the backend on behalf of\n"
<< " nghttpx. This forms tunnel. After that, nghttpx\n"
<< " performs SSL/TLS handshake with the\n"
<< " downstream through the tunnel. The timeouts\n"
<< " when connecting and making CONNECT request\n"
<< " can be specified by --backend-read-timeout\n"
<< " and --backend-write-timeout options.\n"
<< "\n"
<< " SSL/TLS:\n"
<< " --ciphers=<SUITE> Set allowed cipher list. The format of the\n"
<< " string is described in OpenSSL ciphers(1).\n"
<< " If this option is used, --honor-cipher-order\n"
<< " is implicitly enabled.\n"
<< " --honor-cipher-order\n"
<< " Honor server cipher order, giving the\n"
<< " ability to mitigate BEAST attacks.\n"
<< " -k, --insecure Don't verify backend server's certificate\n"
<< " if -p, --client or --http2-bridge are given\n"
<< " and --backend-no-tls is not given\n"
<< " --cacert=<PATH> Set path to trusted CA certificate file\n"
<< " if -p, --client or --http2-bridge are given\n"
<< " and --backend-no-tls is not given\n"
<< " The file must be in PEM format. It can\n"
<< " contain multiple certificates. If the\n"
<< " linked OpenSSL is configured to load system\n"
<< " wide certificates, they are loaded\n"
<< " at startup regardless of this option.\n"
<< " --private-key-passwd-file=<FILEPATH>\n"
<< " Path to file that contains password for the\n"
<< " server's private key. If none is given and\n"
<< " the private key is password protected it'll\n"
<< " be requested interactively.\n"
<< " --subcert=<KEYPATH>:<CERTPATH>\n"
<< " Specify additional certificate and private\n"
<< " key file. nghttpx will choose certificates\n"
<< " based on the hostname indicated by client\n"
<< " using TLS SNI extension. This option can be\n"
<< " used multiple times.\n"
<< " --backend-tls-sni-field=<HOST>\n"
<< " Explicitly set the content of the TLS SNI\n"
<< " extension. This will default to the backend\n"
<< " HOST name.\n"
<< " --dh-param-file=<PATH>\n"
<< " Path to file that contains DH parameters in\n"
<< " PEM format. Without this option, DHE cipher\n"
<< " suites are not available.\n"
<< " --npn-list=<LIST> Comma delimited list of NPN/ALPN protocol sorted\n"
<< " in the order of preference. That means\n"
<< " most desirable protocol comes first.\n"
<< " The parameter must be delimited by a single\n"
<< " comma only and any white spaces are treated\n"
<< " as a part of protocol string.\n"
<< " Default: " << DEFAULT_NPN_LIST << "\n"
<< " --verify-client Require and verify client certificate.\n"
<< " --verify-client-cacert=<PATH>\n"
<< " Path to file that contains CA certificates\n"
<< " to verify client certificate.\n"
<< " The file must be in PEM format. It can\n"
<< " contain multiple certificates.\n"
<< " --client-private-key-file=<PATH>\n"
<< " Path to file that contains client private\n"
<< " key used in backend client authentication.\n"
<< " --client-cert-file=<PATH>\n"
<< " Path to file that contains client\n"
<< " certificate used in backend client\n"
<< " authentication.\n"
<< " --tls-proto-list=<LIST>\n"
<< " Comma delimited list of SSL/TLS protocol to\n"
<< " be enabled.\n"
<< " The following protocols are available:\n"
<< " TLSv1.2, TLSv1.1, TLSv1.0, SSLv3\n"
<< " The name matching is done in case-insensitive\n"
<< " manner.\n"
<< " The parameter must be delimited by a single\n"
<< " comma only and any white spaces are treated\n"
<< " as a part of protocol string.\n"
<< " Default: " << DEFAULT_TLS_PROTO_LIST << "\n"
<< "\n"
<< " HTTP/2.0 and SPDY:\n"
<< " -c, --http2-max-concurrent-streams=<NUM>\n"
<< " Set the maximum number of the concurrent\n"
<< " streams in one HTTP/2.0 and SPDY session.\n"
<< " Default: "
<< get_config()->http2_max_concurrent_streams << "\n"
<< " --frontend-http2-window-bits=<N>\n"
<< " Sets the per-stream initial window size of HTTP/2.0\n"
<< " SPDY frontend connection. For HTTP/2.0, the size is\n"
<< " 2**<N>-1. For SPDY, the size is 2**<N>\n"
<< " Default: "
<< get_config()->http2_upstream_window_bits << "\n"
<< " --frontend-http2-connection-window-bits=<N>\n"
<< " Sets the per-connection window size of HTTP/2.0 and\n"
<< " SPDY frontend connection. For HTTP/2.0, the size is\n"
<< " 2**<N>-1. For SPDY, the size is 2**<N>.\n"
<< " Default: "
<< get_config()->http2_upstream_connection_window_bits << "\n"
<< " --frontend-no-tls Disable SSL/TLS on frontend connections.\n"
<< " --backend-http2-window-bits=<N>\n"
<< " Sets the initial window size of HTTP/2.0 backend\n"
<< " connection to 2**<N>-1.\n"
<< " Default: "
<< get_config()->http2_downstream_window_bits << "\n"
<< " --backend-http2-connection-window-bits=<N>\n"
<< " Sets the per-connection window size of HTTP/2.0\n"
<< " backend connection to 2**<N>-1.\n"
<< " Default: "
<< get_config()->http2_downstream_connection_window_bits << "\n"
<< " --backend-no-tls Disable SSL/TLS on backend connections.\n"
<< " --http2-no-cookie-crumbling\n"
<< " Don't crumble cookie header field.\n"
<< "\n"
<< " Mode:\n"
<< " (default mode) Accept HTTP/2.0, SPDY and HTTP/1.1 over\n"
<< " SSL/TLS. If --frontend-no-tls is used,\n"
<< " accept HTTP/2.0 and HTTP/1.1. The incoming\n"
<< " HTTP/1.1 connection can be upgraded to\n"
<< " HTTP/2.0 through HTTP Upgrade.\n"
<< " The protocol to the backend is HTTP/1.1.\n"
<< " -s, --http2-proxy Like default mode, but enable secure proxy mode.\n"
<< " --http2-bridge Like default mode, but communicate with the\n"
<< " backend in HTTP/2.0 over SSL/TLS. Thus the\n"
<< " incoming all connections are converted\n"
<< " to HTTP/2.0 connection and relayed to\n"
<< " the backend. See --backend-http-proxy-uri\n"
<< " option if you are behind the proxy and want\n"
<< " to connect to the outside HTTP/2.0 proxy.\n"
<< " --client Accept HTTP/2.0 and HTTP/1.1 without SSL/TLS.\n"
<< " The incoming HTTP/1.1 connection can be\n"
<< " upgraded to HTTP/2.0 connection through\n"
<< " HTTP Upgrade.\n"
<< " The protocol to the backend is HTTP/2.0.\n"
<< " To use nghttpx as a forward proxy, use -p\n"
<< " option instead.\n"
<< " -p, --client-proxy Like --client option, but it also requires\n"
<< " the request path from frontend must be\n"
<< " an absolute URI, suitable for use as a\n"
<< " forward proxy.\n"
<< "\n"
<< " Logging:\n"
<< " -L, --log-level=<LEVEL>\n"
<< " Set the severity level of log output.\n"
<< " INFO, WARNING, ERROR and FATAL.\n"
<< " Default: WARNING\n"
<< " --accesslog Print simple accesslog to stderr.\n"
<< " --syslog Send log messages to syslog.\n"
<< " --syslog-facility=<FACILITY>\n"
<< " Set syslog facility.\n"
<< " Default: "
<< str_syslog_facility(get_config()->syslog_facility) << "\n"
<< "\n"
<< " Misc:\n"
<< " --add-x-forwarded-for\n"
<< " Append X-Forwarded-For header field to the\n"
<< " downstream request.\n"
<< " --no-via Don't append to Via header field. If Via\n"
<< " header field is received, it is left\n"
<< " unaltered.\n"
<< " --frontend-http2-dump-request-header=<PATH>\n"
<< " Dumps request headers received by HTTP/2.0\n"
<< " frontend to the file denoted in PATH.\n"
<< " The output is done in HTTP/1 header field\n"
<< " format and each header block is followed by\n"
<< " an empty line.\n"
<< " This option is not thread safe and MUST NOT\n"
<< " be used with option -n=N, where N >= 2.\n"
<< " --frontend-http2-dump-response-header=<PATH>\n"
<< " Dumps response headers sent from HTTP/2.0\n"
<< " frontend to the file denoted in PATH.\n"
<< " The output is done in HTTP/1 header field\n"
<< " format and each header block is followed by\n"
<< " an empty line.\n"
<< " This option is not thread safe and MUST NOT\n"
<< " be used with option -n=N, where N >= 2.\n"
<< " -D, --daemon Run in a background. If -D is used, the\n"
<< " current working directory is changed to '/'.\n"
<< " --pid-file=<PATH> Set path to save PID of this program.\n"
<< " --user=<USER> Run this program as USER. This option is\n"
<< " intended to be used to drop root privileges.\n"
<< " --conf=<PATH> Load configuration from PATH.\n"
<< " Default: "
<< get_config()->conf_path << "\n"
<< " -v, --version Print version and exit.\n"
<< " -h, --help Print this help and exit.\n"
<< std::endl;
}
} // namespace
int main(int argc, char **argv)
{
Log::set_severity_level(WARNING);
create_config();
fill_default_config();
std::vector<std::pair<const char*, const char*> > cmdcfgs;
while(1) {
int flag;
static option long_options[] = {
{"daemon", no_argument, nullptr, 'D'},
{"log-level", required_argument, nullptr, 'L'},
{"backend", required_argument, nullptr, 'b'},
{"http2-max-concurrent-streams", required_argument, nullptr, 'c'},
{"frontend", required_argument, nullptr, 'f'},
{"help", no_argument, nullptr, 'h'},
{"insecure", no_argument, nullptr, 'k'},
{"workers", required_argument, nullptr, 'n'},
{"client-proxy", no_argument, nullptr, 'p'},
{"http2-proxy", no_argument, nullptr, 's'},
{"version", no_argument, nullptr, 'v'},
{"add-x-forwarded-for", no_argument, &flag, 1},
{"frontend-http2-read-timeout", required_argument, &flag, 2},
{"frontend-read-timeout", required_argument, &flag, 3},
{"frontend-write-timeout", required_argument, &flag, 4},
{"backend-read-timeout", required_argument, &flag, 5},
{"backend-write-timeout", required_argument, &flag, 6},
{"accesslog", no_argument, &flag, 7},
{"backend-keep-alive-timeout", required_argument, &flag, 8},
{"frontend-http2-window-bits", required_argument, &flag, 9},
{"pid-file", required_argument, &flag, 10},
{"user", required_argument, &flag, 11},
{"conf", required_argument, &flag, 12},
{"syslog", no_argument, &flag, 13},
{"syslog-facility", required_argument, &flag, 14},
{"backlog", required_argument, &flag, 15},
{"ciphers", required_argument, &flag, 16},
{"client", no_argument, &flag, 17},
{"backend-http2-window-bits", required_argument, &flag, 18},
{"cacert", required_argument, &flag, 19},
{"backend-ipv4", no_argument, &flag, 20},
{"backend-ipv6", no_argument, &flag, 21},
{"private-key-passwd-file", required_argument, &flag, 22},
{"no-via", no_argument, &flag, 23},
{"subcert", required_argument, &flag, 24},
{"http2-bridge", no_argument, &flag, 25},
{"backend-http-proxy-uri", required_argument, &flag, 26},
{"backend-no-tls", no_argument, &flag, 27},
{"frontend-no-tls", no_argument, &flag, 29},
{"backend-tls-sni-field", required_argument, &flag, 31},
{"honor-cipher-order", no_argument, &flag, 32},
{"dh-param-file", required_argument, &flag, 33},
{"read-rate", required_argument, &flag, 34},
{"read-burst", required_argument, &flag, 35},
{"write-rate", required_argument, &flag, 36},
{"write-burst", required_argument, &flag, 37},
{"npn-list", required_argument, &flag, 38},
{"verify-client", no_argument, &flag, 39},
{"verify-client-cacert", required_argument, &flag, 40},
{"client-private-key-file", required_argument, &flag, 41},
{"client-cert-file", required_argument, &flag, 42},
{"frontend-http2-dump-request-header", required_argument, &flag, 43},
{"frontend-http2-dump-response-header", required_argument, &flag, 44},
{"http2-no-cookie-crumbling", no_argument, &flag, 45},
{"frontend-http2-connection-window-bits", required_argument, &flag, 46},
{"backend-http2-connection-window-bits", required_argument, &flag, 47},
{"tls-proto-list", required_argument, &flag, 48},
{nullptr, 0, nullptr, 0 }
};
int option_index = 0;
int c = getopt_long(argc, argv, "DL:b:c:f:hkn:psv", long_options,
&option_index);
if(c == -1) {
break;
}
switch(c) {
case 'D':
cmdcfgs.emplace_back(SHRPX_OPT_DAEMON, "yes");
break;
case 'L':
cmdcfgs.emplace_back(SHRPX_OPT_LOG_LEVEL, optarg);
break;
case 'b':
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND, optarg);
break;
case 'c':
cmdcfgs.emplace_back(SHRPX_OPT_HTTP2_MAX_CONCURRENT_STREAMS, optarg);
break;
case 'f':
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND, optarg);
break;
case 'h':
print_help(std::cout);
exit(EXIT_SUCCESS);
case 'k':
cmdcfgs.emplace_back(SHRPX_OPT_INSECURE, "yes");
break;
case 'n':
cmdcfgs.emplace_back(SHRPX_OPT_WORKERS, optarg);
break;
case 'p':
cmdcfgs.emplace_back(SHRPX_OPT_CLIENT_PROXY, "yes");
break;
case 's':
cmdcfgs.emplace_back(SHRPX_OPT_HTTP2_PROXY, "yes");
break;
case 'v':
print_version(std::cout);
exit(EXIT_SUCCESS);
case '?':
util::show_candidates(argv[optind - 1], long_options);
exit(EXIT_FAILURE);
case 0:
switch(flag) {
case 1:
// --add-x-forwarded-for
cmdcfgs.emplace_back(SHRPX_OPT_ADD_X_FORWARDED_FOR, "yes");
break;
case 2:
// --frontend-http2-read-timeout
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_HTTP2_READ_TIMEOUT, optarg);
break;
case 3:
// --frontend-read-timeout
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_READ_TIMEOUT, optarg);
break;
case 4:
// --frontend-write-timeout
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_WRITE_TIMEOUT, optarg);
break;
case 5:
// --backend-read-timeout
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_READ_TIMEOUT, optarg);
break;
case 6:
// --backend-write-timeout
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_WRITE_TIMEOUT, optarg);
break;
case 7:
cmdcfgs.emplace_back(SHRPX_OPT_ACCESSLOG, "yes");
break;
case 8:
// --backend-keep-alive-timeout
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_KEEP_ALIVE_TIMEOUT, optarg);
break;
case 9:
// --frontend-http2-window-bits
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_HTTP2_WINDOW_BITS, optarg);
break;
case 10:
cmdcfgs.emplace_back(SHRPX_OPT_PID_FILE, optarg);
break;
case 11:
cmdcfgs.emplace_back(SHRPX_OPT_USER, optarg);
break;
case 12:
// --conf
set_config_str(&mod_config()->conf_path, optarg);
break;
case 13:
// --syslog
cmdcfgs.emplace_back(SHRPX_OPT_SYSLOG, "yes");
break;
case 14:
// --syslog-facility
cmdcfgs.emplace_back(SHRPX_OPT_SYSLOG_FACILITY, optarg);
break;
case 15:
// --backlog
cmdcfgs.emplace_back(SHRPX_OPT_BACKLOG, optarg);
break;
case 16:
// --ciphers
cmdcfgs.emplace_back(SHRPX_OPT_CIPHERS, optarg);
break;
case 17:
// --client
cmdcfgs.emplace_back(SHRPX_OPT_CLIENT, "yes");
break;
case 18:
// --backend-http2-window-bits
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_HTTP2_WINDOW_BITS, optarg);
break;
case 19:
// --cacert
cmdcfgs.emplace_back(SHRPX_OPT_CACERT, optarg);
break;
case 20:
// --backend-ipv4
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_IPV4, "yes");
break;
case 21:
// --backend-ipv6
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_IPV6, "yes");
break;
case 22:
// --private-key-passwd-file
cmdcfgs.emplace_back(SHRPX_OPT_PRIVATE_KEY_PASSWD_FILE, optarg);
break;
case 23:
// --no-via
cmdcfgs.emplace_back(SHRPX_OPT_NO_VIA, "yes");
break;
case 24:
// --subcert
cmdcfgs.emplace_back(SHRPX_OPT_SUBCERT, optarg);
break;
case 25:
// --http2-bridge
cmdcfgs.emplace_back(SHRPX_OPT_HTTP2_BRIDGE, "yes");
break;
case 26:
// --backend-http-proxy-uri
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_HTTP_PROXY_URI, optarg);
break;
case 27:
// --backend-no-tls
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_NO_TLS, "yes");
break;
case 29:
// --frontend-no-tls
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_NO_TLS, "yes");
break;
case 31:
// --backend-tls-sni-field
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_TLS_SNI_FIELD, optarg);
break;
case 32:
// --honor-cipher-order
cmdcfgs.emplace_back(SHRPX_OPT_HONOR_CIPHER_ORDER, "yes");
break;
case 33:
// --dh-param-file
cmdcfgs.emplace_back(SHRPX_OPT_DH_PARAM_FILE, optarg);
break;
case 34:
// --read-rate
cmdcfgs.emplace_back(SHRPX_OPT_READ_RATE, optarg);
break;
case 35:
// --read-burst
cmdcfgs.emplace_back(SHRPX_OPT_READ_BURST, optarg);
break;
case 36:
// --write-rate
cmdcfgs.emplace_back(SHRPX_OPT_WRITE_RATE, optarg);
break;
case 37:
// --write-burst
cmdcfgs.emplace_back(SHRPX_OPT_WRITE_BURST, optarg);
break;
case 38:
// --npn-list
cmdcfgs.emplace_back(SHRPX_OPT_NPN_LIST, optarg);
break;
case 39:
// --verify-client
cmdcfgs.emplace_back(SHRPX_OPT_VERIFY_CLIENT, "yes");
break;
case 40:
// --verify-client-cacert
cmdcfgs.emplace_back(SHRPX_OPT_VERIFY_CLIENT_CACERT, optarg);
break;
case 41:
// --client-private-key-file
cmdcfgs.emplace_back(SHRPX_OPT_CLIENT_PRIVATE_KEY_FILE, optarg);
break;
case 42:
// --client-cert-file
cmdcfgs.emplace_back(SHRPX_OPT_CLIENT_CERT_FILE, optarg);
break;
case 43:
// --frontend-http2-dump-request-header
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_HTTP2_DUMP_REQUEST_HEADER,
optarg);
break;
case 44:
// --frontend-http2-dump-response-header
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_HTTP2_DUMP_RESPONSE_HEADER,
optarg);
break;
case 45:
// --http2-no-cookie-crumbling
cmdcfgs.emplace_back(SHRPX_OPT_HTTP2_NO_COOKIE_CRUMBLING, "yes");
break;
case 46:
// --frontend-http2-connection-window-bits
cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_HTTP2_CONNECTION_WINDOW_BITS,
optarg);
break;
case 47:
// --backend-http2-connection-window-bits
cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_HTTP2_CONNECTION_WINDOW_BITS,
optarg);
break;
case 48:
// --tls-proto-list
cmdcfgs.emplace_back(SHRPX_OPT_TLS_PROTO_LIST, optarg);
break;
default:
break;
}
break;
default:
break;
}
}
// Initialize OpenSSL before parsing options because we create
// SSL_CTX there.
OpenSSL_add_all_algorithms();
SSL_load_error_strings();
SSL_library_init();
ssl::setup_ssl_lock();
if(conf_exists(get_config()->conf_path)) {
if(load_config(get_config()->conf_path) == -1) {
LOG(FATAL) << "Failed to load configuration from "
<< get_config()->conf_path;
exit(EXIT_FAILURE);
}
}
if(argc - optind >= 2) {
cmdcfgs.emplace_back(SHRPX_OPT_PRIVATE_KEY_FILE, argv[optind++]);
cmdcfgs.emplace_back(SHRPX_OPT_CERTIFICATE_FILE, argv[optind++]);
}
for(size_t i = 0, len = cmdcfgs.size(); i < len; ++i) {
if(parse_config(cmdcfgs[i].first, cmdcfgs[i].second) == -1) {
LOG(FATAL) << "Failed to parse command-line argument.";
exit(EXIT_FAILURE);
}
}
if(!get_config()->npn_list) {
mod_config()->npn_list = parse_config_str_list(&mod_config()->npn_list_len,
DEFAULT_NPN_LIST);
}
if(!get_config()->tls_proto_list) {
mod_config()->tls_proto_list = parse_config_str_list
(&mod_config()->tls_proto_list_len, DEFAULT_TLS_PROTO_LIST);
}
if(!get_config()->subcerts.empty()) {
mod_config()->cert_tree = ssl::cert_lookup_tree_new();
}
for(auto& keycert : get_config()->subcerts) {
auto ssl_ctx = ssl::create_ssl_context(keycert.first.c_str(),
keycert.second.c_str());
if(ssl::cert_lookup_tree_add_cert_from_file
(get_config()->cert_tree, ssl_ctx, keycert.second.c_str()) == -1) {
LOG(FATAL) << "Failed to add sub certificate.";
exit(EXIT_FAILURE);
}
}
if(get_config()->cert_file && get_config()->private_key_file) {
mod_config()->default_ssl_ctx =
ssl::create_ssl_context(get_config()->private_key_file,
get_config()->cert_file);
if(get_config()->cert_tree) {
if(ssl::cert_lookup_tree_add_cert_from_file(get_config()->cert_tree,
get_config()->default_ssl_ctx,
get_config()->cert_file)
== -1) {
LOG(FATAL) << "Failed to parse command-line argument.";
exit(EXIT_FAILURE);
}
}
}
if(get_config()->backend_ipv4 && get_config()->backend_ipv6) {
LOG(FATAL) << "--backend-ipv4 and --backend-ipv6 cannot be used at the "
<< "same time.";
exit(EXIT_FAILURE);
}
if(get_config()->http2_proxy + get_config()->http2_bridge +
get_config()->client_proxy + get_config()->client > 1) {
LOG(FATAL) << "--http2-proxy, --http2-bridge, --client-proxy and --client "
<< "cannot be used at the same time.";
exit(EXIT_FAILURE);
}
if(get_config()->client || get_config()->client_proxy) {
mod_config()->client_mode = true;
}
if(get_config()->client_mode || get_config()->http2_bridge) {
mod_config()->downstream_proto = PROTO_HTTP2;
} else {
mod_config()->downstream_proto = PROTO_HTTP;
}
if(!get_config()->client_mode && !get_config()->upstream_no_tls) {
if(!get_config()->private_key_file || !get_config()->cert_file) {
print_usage(std::cerr);
LOG(FATAL) << "Too few arguments";
exit(EXIT_FAILURE);
}
}
char hostport[NI_MAXHOST+16];
bool downstream_ipv6_addr =
is_ipv6_numeric_addr(get_config()->downstream_host);
snprintf(hostport, sizeof(hostport), "%s%s%s:%u",
downstream_ipv6_addr ? "[" : "",
get_config()->downstream_host,
downstream_ipv6_addr ? "]" : "",
get_config()->downstream_port);
set_config_str(&mod_config()->downstream_hostport, hostport);
if(LOG_ENABLED(INFO)) {
LOG(INFO) << "Resolving backend address";
}
if(resolve_hostname(&mod_config()->downstream_addr,
&mod_config()->downstream_addrlen,
get_config()->downstream_host,
get_config()->downstream_port,
get_config()->backend_ipv4 ? AF_INET :
(get_config()->backend_ipv6 ?
AF_INET6 : AF_UNSPEC)) == -1) {
exit(EXIT_FAILURE);
}
if(get_config()->downstream_http_proxy_host) {
if(LOG_ENABLED(INFO)) {
LOG(INFO) << "Resolving backend http proxy address";
}
if(resolve_hostname(&mod_config()->downstream_http_proxy_addr,
&mod_config()->downstream_http_proxy_addrlen,
get_config()->downstream_http_proxy_host,
get_config()->downstream_http_proxy_port,
AF_UNSPEC) == -1) {
exit(EXIT_FAILURE);
}
}
if(get_config()->syslog) {
openlog("nghttpx", LOG_NDELAY | LOG_NOWAIT | LOG_PID,
get_config()->syslog_facility);
mod_config()->use_syslog = true;
}
mod_config()->rate_limit_cfg = ev_token_bucket_cfg_new
(get_rate_limit(get_config()->read_rate),
get_rate_limit(get_config()->read_burst),
get_rate_limit(get_config()->write_rate),
get_rate_limit(get_config()->write_burst),
nullptr);
struct sigaction act;
memset(&act, 0, sizeof(struct sigaction));
act.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &act, 0);
event_loop();
ssl::teardown_ssl_lock();
return 0;
}
} // namespace shrpx
int main(int argc, char **argv)
{
return shrpx::main(argc, argv);
}
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