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nghttp2/src/shrpx_config.cc

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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_config.h"
#include <pwd.h>
#include <netdb.h>
#include <syslog.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <cstring>
#include <cerrno>
#include <limits>
#include <fstream>
#include <nghttp2/nghttp2.h>
#include "shrpx_log.h"
#include "shrpx_ssl.h"
#include "shrpx_http.h"
#include "util.h"
using namespace nghttp2;
namespace shrpx {
const char SHRPX_OPT_PRIVATE_KEY_FILE[] = "private-key-file";
const char SHRPX_OPT_PRIVATE_KEY_PASSWD_FILE[] = "private-key-passwd-file";
const char SHRPX_OPT_CERTIFICATE_FILE[] = "certificate-file";
const char SHRPX_OPT_SUBCERT[] = "subcert";
const char SHRPX_OPT_BACKEND[] = "backend";
const char SHRPX_OPT_FRONTEND[] = "frontend";
const char SHRPX_OPT_WORKERS[] = "workers";
const char
SHRPX_OPT_SPDY_MAX_CONCURRENT_STREAMS[] = "spdy-max-concurrent-streams";
const char SHRPX_OPT_LOG_LEVEL[] = "log-level";
const char SHRPX_OPT_DAEMON[] = "daemon";
const char SHRPX_OPT_SPDY_PROXY[] = "spdy-proxy";
const char SHRPX_OPT_SPDY_BRIDGE[] = "spdy-bridge";
const char SHRPX_OPT_CLIENT_PROXY[] = "client-proxy";
const char SHRPX_OPT_ADD_X_FORWARDED_FOR[] = "add-x-forwarded-for";
const char SHRPX_OPT_NO_VIA[] = "no-via";
const char
SHRPX_OPT_FRONTEND_SPDY_READ_TIMEOUT[] = "frontend-spdy-read-timeout";
const char SHRPX_OPT_FRONTEND_READ_TIMEOUT[] = "frontend-read-timeout";
const char SHRPX_OPT_FRONTEND_WRITE_TIMEOUT[] = "frontend-write-timeout";
const char SHRPX_OPT_BACKEND_READ_TIMEOUT[] = "backend-read-timeout";
const char SHRPX_OPT_BACKEND_WRITE_TIMEOUT[] = "backend-write-timeout";
const char SHRPX_OPT_ACCESSLOG[] = "accesslog";
const char
SHRPX_OPT_BACKEND_KEEP_ALIVE_TIMEOUT[] = "backend-keep-alive-timeout";
const char SHRPX_OPT_FRONTEND_SPDY_WINDOW_BITS[] = "frontend-spdy-window-bits";
const char SHRPX_OPT_BACKEND_SPDY_WINDOW_BITS[] = "backend-spdy-window-bits";
const char SHRPX_OPT_FRONTEND_SPDY_NO_TLS[] = "frontend-spdy-no-tls";
const char SHRPX_OPT_FRONTEND_SPDY_PROTO[] = "frontend-spdy-proto";
const char SHRPX_OPT_BACKEND_SPDY_NO_TLS[] = "backend-spdy-no-tls";
const char SHRPX_OPT_BACKEND_SPDY_PROTO[] = "backend-spdy-proto";
const char SHRPX_OPT_BACKEND_TLS_SNI_FIELD[] = "backend-tls-sni-field";
const char SHRPX_OPT_PID_FILE[] = "pid-file";
const char SHRPX_OPT_USER[] = "user";
const char SHRPX_OPT_SYSLOG[] = "syslog";
const char SHRPX_OPT_SYSLOG_FACILITY[] = "syslog-facility";
const char SHRPX_OPT_BACKLOG[] = "backlog";
const char SHRPX_OPT_CIPHERS[] = "ciphers";
const char SHRPX_OPT_HONOR_CIPHER_ORDER[] = "honor-cipher-order";
const char SHRPX_OPT_CLIENT[] = "client";
const char SHRPX_OPT_INSECURE[] = "insecure";
const char SHRPX_OPT_CACERT[] = "cacert";
const char SHRPX_OPT_BACKEND_IPV4[] = "backend-ipv4";
const char SHRPX_OPT_BACKEND_IPV6[] = "backend-ipv6";
const char SHRPX_OPT_BACKEND_HTTP_PROXY_URI[] = "backend-http-proxy-uri";
namespace {
Config *config = 0;
} // namespace
const Config* get_config()
{
return config;
}
Config* mod_config()
{
return config;
}
void create_config()
{
config = new Config();
}
namespace {
int split_host_port(char *host, size_t hostlen, uint16_t *port_ptr,
const char *hostport)
{
// host and port in |hostport| is separated by single ','.
const char *p = strchr(hostport, ',');
if(!p) {
LOG(ERROR) << "Invalid host, port: " << hostport;
return -1;
}
size_t len = p-hostport;
if(hostlen < len+1) {
LOG(ERROR) << "Hostname too long: " << hostport;
return -1;
}
memcpy(host, hostport, len);
host[len] = '\0';
errno = 0;
unsigned long d = strtoul(p+1, 0, 10);
if(errno == 0 && 1 <= d && d <= std::numeric_limits<uint16_t>::max()) {
*port_ptr = d;
return 0;
} else {
LOG(ERROR) << "Port is invalid: " << p+1;
return -1;
}
}
} // namespace
namespace {
bool is_secure(const char *filename)
{
struct stat buf;
int rv = stat(filename, &buf);
if (rv == 0) {
if ((buf.st_mode & S_IRWXU) &&
!(buf.st_mode & S_IRWXG) &&
!(buf.st_mode & S_IRWXO)) {
return true;
}
}
return false;
}
} // namespace
std::string read_passwd_from_file(const char *filename)
{
std::string line;
if (!is_secure(filename)) {
LOG(ERROR) << "Private key passwd file " << filename
<< " has insecure mode.";
return line;
}
std::ifstream in(filename, std::ios::binary);
if(!in) {
LOG(ERROR) << "Could not open key passwd file " << filename;
return line;
}
std::getline(in, line);
return line;
}
void set_config_str(char **destp, const char *val)
{
if(*destp) {
free(*destp);
}
*destp = strdup(val);
}
namespace {
// Parses |optarg| as SPDY NPN protocol string and returns SPDY
// protocol version number. This function returns -1 on error.
int parse_spdy_proto(const char *optarg)
{
size_t len = strlen(optarg);
const unsigned char *proto;
proto = reinterpret_cast<const unsigned char*>(optarg);
uint16_t version = nghttp2_npn_get_version(proto, len);
if(!version) {
LOG(ERROR) << "Unsupported SPDY version: " << optarg;
return -1;
}
return version;
}
} // namespace
int parse_config(const char *opt, const char *optarg)
{
char host[NI_MAXHOST];
uint16_t port;
if(util::strieq(opt, SHRPX_OPT_BACKEND)) {
if(split_host_port(host, sizeof(host), &port, optarg) == -1) {
return -1;
} else {
set_config_str(&mod_config()->downstream_host, host);
mod_config()->downstream_port = port;
}
} else if(util::strieq(opt, SHRPX_OPT_FRONTEND)) {
if(split_host_port(host, sizeof(host), &port, optarg) == -1) {
return -1;
} else {
set_config_str(&mod_config()->host, host);
mod_config()->port = port;
}
} else if(util::strieq(opt, SHRPX_OPT_WORKERS)) {
mod_config()->num_worker = strtol(optarg, 0, 10);
} else if(util::strieq(opt, SHRPX_OPT_SPDY_MAX_CONCURRENT_STREAMS)) {
mod_config()->spdy_max_concurrent_streams = strtol(optarg, 0, 10);
} else if(util::strieq(opt, SHRPX_OPT_LOG_LEVEL)) {
if(Log::set_severity_level_by_name(optarg) == -1) {
LOG(ERROR) << "Invalid severity level: " << optarg;
return -1;
}
} else if(util::strieq(opt, SHRPX_OPT_DAEMON)) {
mod_config()->daemon = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_SPDY_PROXY)) {
mod_config()->spdy_proxy = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_SPDY_BRIDGE)) {
mod_config()->spdy_bridge = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_CLIENT_PROXY)) {
mod_config()->client_proxy = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_ADD_X_FORWARDED_FOR)) {
mod_config()->add_x_forwarded_for = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_NO_VIA)) {
mod_config()->no_via = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_FRONTEND_SPDY_READ_TIMEOUT)) {
timeval tv = {strtol(optarg, 0, 10), 0};
mod_config()->spdy_upstream_read_timeout = tv;
} else if(util::strieq(opt, SHRPX_OPT_FRONTEND_READ_TIMEOUT)) {
timeval tv = {strtol(optarg, 0, 10), 0};
mod_config()->upstream_read_timeout = tv;
} else if(util::strieq(opt, SHRPX_OPT_FRONTEND_WRITE_TIMEOUT)) {
timeval tv = {strtol(optarg, 0, 10), 0};
mod_config()->upstream_write_timeout = tv;
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_READ_TIMEOUT)) {
timeval tv = {strtol(optarg, 0, 10), 0};
mod_config()->downstream_read_timeout = tv;
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_WRITE_TIMEOUT)) {
timeval tv = {strtol(optarg, 0, 10), 0};
mod_config()->downstream_write_timeout = tv;
} else if(util::strieq(opt, SHRPX_OPT_ACCESSLOG)) {
mod_config()->accesslog = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_KEEP_ALIVE_TIMEOUT)) {
timeval tv = {strtol(optarg, 0, 10), 0};
mod_config()->downstream_idle_read_timeout = tv;
} else if(util::strieq(opt, SHRPX_OPT_FRONTEND_SPDY_WINDOW_BITS) ||
util::strieq(opt, SHRPX_OPT_BACKEND_SPDY_WINDOW_BITS)) {
size_t *resp;
const char *optname;
if(util::strieq(opt, SHRPX_OPT_FRONTEND_SPDY_WINDOW_BITS)) {
resp = &mod_config()->spdy_upstream_window_bits;
optname = SHRPX_OPT_FRONTEND_SPDY_WINDOW_BITS;
} else {
resp = &mod_config()->spdy_downstream_window_bits;
optname = SHRPX_OPT_BACKEND_SPDY_WINDOW_BITS;
}
errno = 0;
unsigned long int n = strtoul(optarg, 0, 10);
if(errno == 0 && n < 31) {
*resp = n;
} else {
LOG(ERROR) << "--" << optname
<< " specify the integer in the range [0, 30], inclusive";
return -1;
}
} else if(util::strieq(opt, SHRPX_OPT_FRONTEND_SPDY_NO_TLS)) {
mod_config()->spdy_upstream_no_tls = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_FRONTEND_SPDY_PROTO)) {
int version = parse_spdy_proto(optarg);
if(version == -1) {
return -1;
} else {
mod_config()->spdy_upstream_version = version;
}
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_SPDY_NO_TLS)) {
mod_config()->spdy_downstream_no_tls = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_SPDY_PROTO)) {
int version = parse_spdy_proto(optarg);
if(version == -1) {
return -1;
} else {
mod_config()->spdy_downstream_version = version;
}
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_TLS_SNI_FIELD)) {
set_config_str(&mod_config()->backend_tls_sni_name, optarg);
} else if(util::strieq(opt, SHRPX_OPT_PID_FILE)) {
set_config_str(&mod_config()->pid_file, optarg);
} else if(util::strieq(opt, SHRPX_OPT_USER)) {
passwd *pwd = getpwnam(optarg);
if(pwd == 0) {
LOG(ERROR) << "--user: failed to get uid from " << optarg
<< ": " << strerror(errno);
return -1;
}
mod_config()->uid = pwd->pw_uid;
mod_config()->gid = pwd->pw_gid;
} else if(util::strieq(opt, SHRPX_OPT_PRIVATE_KEY_FILE)) {
set_config_str(&mod_config()->private_key_file, optarg);
} else if(util::strieq(opt, SHRPX_OPT_PRIVATE_KEY_PASSWD_FILE)) {
std::string passwd = read_passwd_from_file(optarg);
if (passwd.empty()) {
LOG(ERROR) << "Couldn't read key file's passwd from " << optarg;
return -1;
}
set_config_str(&mod_config()->private_key_passwd, passwd.c_str());
} else if(util::strieq(opt, SHRPX_OPT_CERTIFICATE_FILE)) {
set_config_str(&mod_config()->cert_file, optarg);
} else if(util::strieq(opt, SHRPX_OPT_SUBCERT)) {
// Private Key file and certificate file separated by ':'.
const char *sp = strchr(optarg, ':');
if(sp) {
std::string keyfile(optarg, sp);
// TODO Do we need private key for subcert?
SSL_CTX *ssl_ctx = ssl::create_ssl_context(keyfile.c_str(), sp+1);
if(!get_config()->cert_tree) {
mod_config()->cert_tree = ssl::cert_lookup_tree_new();
}
if(ssl::cert_lookup_tree_add_cert_from_file(get_config()->cert_tree,
ssl_ctx, sp+1) == -1) {
return -1;
}
}
} else if(util::strieq(opt, SHRPX_OPT_SYSLOG)) {
mod_config()->syslog = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_SYSLOG_FACILITY)) {
int facility = int_syslog_facility(optarg);
if(facility == -1) {
LOG(ERROR) << "Unknown syslog facility: " << optarg;
return -1;
}
mod_config()->syslog_facility = facility;
} else if(util::strieq(opt, SHRPX_OPT_BACKLOG)) {
mod_config()->backlog = strtol(optarg, 0, 10);
} else if(util::strieq(opt, SHRPX_OPT_CIPHERS)) {
set_config_str(&mod_config()->ciphers, optarg);
} else if(util::strieq(opt, SHRPX_OPT_HONOR_CIPHER_ORDER)) {
mod_config()->honor_cipher_order = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_CLIENT)) {
mod_config()->client = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_INSECURE)) {
mod_config()->insecure = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_CACERT)) {
set_config_str(&mod_config()->cacert, optarg);
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_IPV4)) {
mod_config()->backend_ipv4 = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_IPV6)) {
mod_config()->backend_ipv6 = util::strieq(optarg, "yes");
} else if(util::strieq(opt, SHRPX_OPT_BACKEND_HTTP_PROXY_URI)) {
// parse URI and get hostname, port and optionally userinfo.
http_parser_url u;
memset(&u, 0, sizeof(u));
int rv = http_parser_parse_url(optarg, strlen(optarg), 0, &u);
if(rv == 0) {
std::string val;
if(u.field_set & UF_USERINFO) {
http::copy_url_component(val, &u, UF_USERINFO, optarg);
// Surprisingly, u.field_set & UF_USERINFO is nonzero even if
// userinfo component is empty string.
if(!val.empty()) {
val = util::percentDecode(val.begin(), val.end());
set_config_str(&mod_config()->downstream_http_proxy_userinfo,
val.c_str());
}
}
if(u.field_set & UF_HOST) {
http::copy_url_component(val, &u, UF_HOST, optarg);
set_config_str(&mod_config()->downstream_http_proxy_host, val.c_str());
} else {
LOG(ERROR) << "backend-http-proxy-uri does not contain hostname";
return -1;
}
if(u.field_set & UF_PORT) {
mod_config()->downstream_http_proxy_port = u.port;
} else {
LOG(ERROR) << "backend-http-proxy-uri does not contain port";
return -1;
}
} else {
LOG(ERROR) << "Could not parse backend-http-proxy-uri";
return -1;
}
} else if(util::strieq(opt, "conf")) {
LOG(WARNING) << "conf is ignored";
} else {
LOG(ERROR) << "Unknown option: " << opt;
return -1;
}
return 0;
}
int load_config(const char *filename)
{
std::ifstream in(filename, std::ios::binary);
if(!in) {
LOG(ERROR) << "Could not open config file " << filename;
return -1;
}
std::string line;
int linenum = 0;
while(std::getline(in, line)) {
++linenum;
if(line.empty() || line[0] == '#') {
continue;
}
size_t i;
size_t size = line.size();
for(i = 0; i < size && line[i] != '='; ++i);
if(i == size) {
LOG(ERROR) << "Bad configuration format at line " << linenum;
return -1;
}
line[i] = '\0';
const char *s = line.c_str();
if(parse_config(s, s+i+1) == -1) {
return -1;
}
}
return 0;
}
const char* str_syslog_facility(int facility)
{
switch(facility) {
case(LOG_AUTH):
return "auth";
case(LOG_AUTHPRIV):
return "authpriv";
case(LOG_CRON):
return "cron";
case(LOG_DAEMON):
return "daemon";
case(LOG_FTP):
return "ftp";
case(LOG_KERN):
return "kern";
case(LOG_LOCAL0):
return "local0";
case(LOG_LOCAL1):
return "local1";
case(LOG_LOCAL2):
return "local2";
case(LOG_LOCAL3):
return "local3";
case(LOG_LOCAL4):
return "local4";
case(LOG_LOCAL5):
return "local5";
case(LOG_LOCAL6):
return "local6";
case(LOG_LOCAL7):
return "local7";
case(LOG_LPR):
return "lpr";
case(LOG_MAIL):
return "mail";
case(LOG_SYSLOG):
return "syslog";
case(LOG_USER):
return "user";
case(LOG_UUCP):
return "uucp";
default:
return "(unknown)";
}
}
int int_syslog_facility(const char *strfacility)
{
if(util::strieq(strfacility, "auth")) {
return LOG_AUTH;
} else if(util::strieq(strfacility, "authpriv")) {
return LOG_AUTHPRIV;
} else if(util::strieq(strfacility, "cron")) {
return LOG_CRON;
} else if(util::strieq(strfacility, "daemon")) {
return LOG_DAEMON;
} else if(util::strieq(strfacility, "ftp")) {
return LOG_FTP;
} else if(util::strieq(strfacility, "kern")) {
return LOG_KERN;
} else if(util::strieq(strfacility, "local0")) {
return LOG_LOCAL0;
} else if(util::strieq(strfacility, "local1")) {
return LOG_LOCAL1;
} else if(util::strieq(strfacility, "local2")) {
return LOG_LOCAL2;
} else if(util::strieq(strfacility, "local3")) {
return LOG_LOCAL3;
} else if(util::strieq(strfacility, "local4")) {
return LOG_LOCAL4;
} else if(util::strieq(strfacility, "local5")) {
return LOG_LOCAL5;
} else if(util::strieq(strfacility, "local6")) {
return LOG_LOCAL6;
} else if(util::strieq(strfacility, "local7")) {
return LOG_LOCAL7;
} else if(util::strieq(strfacility, "lpr")) {
return LOG_LPR;
} else if(util::strieq(strfacility, "mail")) {
return LOG_MAIL;
} else if(util::strieq(strfacility, "news")) {
return LOG_NEWS;
} else if(util::strieq(strfacility, "syslog")) {
return LOG_SYSLOG;
} else if(util::strieq(strfacility, "user")) {
return LOG_USER;
} else if(util::strieq(strfacility, "uucp")) {
return LOG_UUCP;
} else {
return -1;
}
}
} // namespace shrpx
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