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nghttp2
Commit 2fd095d0 authored by Tatsuhiro Tsujikawa's avatar Tatsuhiro Tsujikawa
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nghttpx: Share the code to configure backends

parent 09150a79
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Showing with 201 additions and 183 deletions
src/shrpx.cc
View file @ 2fd095d0
......@@ -146,52 +146,6 @@ struct SignalServer {
pid_t worker_process_pid;
};
namespace {
int resolve_hostname(Address *addr, const char *hostname, uint16_t port,
int family) {
int rv;
auto service = util::utos(port);
addrinfo hints{};
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.c_str(), &hints, &res);
if (rv != 0) {
LOG(FATAL) << "Unable to resolve address for " << hostname << ": "
<< gai_strerror(rv);
return -1;
}
auto res_d = defer(freeaddrinfo, res);
char host[NI_MAXHOST];
rv = getnameinfo(res->ai_addr, res->ai_addrlen, host, sizeof(host), nullptr,
0, NI_NUMERICHOST);
if (rv != 0) {
LOG(FATAL) << "Address resolution for " << hostname
<< " failed: " << gai_strerror(rv);
return -1;
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Address resolution for " << hostname
<< " succeeded: " << host;
}
memcpy(&addr->su, res->ai_addr, res->ai_addrlen);
addr->len = res->ai_addrlen;
return 0;
}
} // namespace
namespace {
int chown_to_running_user(const char *path) {
return chown(path, get_config()->uid, get_config()->gid);
......@@ -1075,11 +1029,6 @@ constexpr auto DEFAULT_ACCESSLOG_FORMAT = StringRef::from_lit(
R"("$http_referer" "$http_user_agent")");
} // namespace
namespace {
constexpr char DEFAULT_DOWNSTREAM_HOST[] = "127.0.0.1";
constexpr int16_t DEFAULT_DOWNSTREAM_PORT = 80;
} // namespace;
namespace {
void fill_default_config() {
*mod_config() = {};
......@@ -2151,7 +2100,6 @@ void process_options(int argc, char **argv,
auto &listenerconf = mod_config()->conn.listener;
auto &upstreamconf = mod_config()->conn.upstream;
auto &downstreamconf = mod_config()->conn.downstream;
if (listenerconf.addrs.empty()) {
UpstreamAddr addr{};
......@@ -2185,140 +2133,11 @@ void process_options(int argc, char **argv,
}
}
auto &addr_groups = downstreamconf.addr_groups;
if (addr_groups.empty()) {
DownstreamAddrConfig addr{};
addr.host = ImmutableString::from_lit(DEFAULT_DOWNSTREAM_HOST);
addr.port = DEFAULT_DOWNSTREAM_PORT;
addr.proto = PROTO_HTTP1;
DownstreamAddrGroupConfig g(StringRef::from_lit("/"));
g.addrs.push_back(std::move(addr));
mod_config()->router.add_route(StringRef{g.pattern}, addr_groups.size());
addr_groups.push_back(std::move(g));
} else if (get_config()->http2_proxy) {
// We don't support host mapping in these cases. Move all
// non-catch-all patterns to catch-all pattern.
DownstreamAddrGroupConfig catch_all(StringRef::from_lit("/"));
for (auto &g : addr_groups) {
std::move(std::begin(g.addrs), std::end(g.addrs),
std::back_inserter(catch_all.addrs));
}
std::vector<DownstreamAddrGroupConfig>().swap(addr_groups);
std::vector<WildcardPattern>().swap(mod_config()->wildcard_patterns);
// maybe not necessary?
mod_config()->router = Router();
mod_config()->router.add_route(StringRef{catch_all.pattern},
addr_groups.size());
addr_groups.push_back(std::move(catch_all));
} else {
auto &wildcard_patterns = mod_config()->wildcard_patterns;
std::sort(std::begin(wildcard_patterns), std::end(wildcard_patterns),
[](const WildcardPattern &lhs, const WildcardPattern &rhs) {
return std::lexicographical_compare(
rhs.host.rbegin(), rhs.host.rend(), lhs.host.rbegin(),
lhs.host.rend());
});
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Reverse sorted wildcard hosts (compared from tail to head, "
"and sorted in reverse order):";
for (auto &wp : mod_config()->wildcard_patterns) {
LOG(INFO) << wp.host;
}
}
}
// backward compatibility: override all SNI fields with the option
// value --backend-tls-sni-field
if (!tlsconf.backend_sni_name.empty()) {
auto &sni = tlsconf.backend_sni_name;
for (auto &addr_group : addr_groups) {
for (auto &addr : addr_group.addrs) {
addr.sni = sni;
}
}
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Resolving backend address";
}
ssize_t catch_all_group = -1;
for (size_t i = 0; i < addr_groups.size(); ++i) {
auto &g = addr_groups[i];
if (g.pattern == StringRef::from_lit("/")) {
catch_all_group = i;
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Host-path pattern: group " << i << ": '" << g.pattern
<< "'";
for (auto &addr : g.addrs) {
LOG(INFO) << "group " << i << " -> " << addr.host.c_str()
<< (addr.host_unix ? "" : ":" + util::utos(addr.port))
<< ", proto=" << strproto(addr.proto)
<< (addr.tls ? ", tls" : "");
}
}
}
if (catch_all_group == -1) {
LOG(FATAL) << "backend: No catch-all backend address is configured";
if (configure_downstream_group(mod_config(), get_config()->http2_proxy, false,
tlsconf) != 0) {
exit(EXIT_FAILURE);
}
downstreamconf.addr_group_catch_all = catch_all_group;
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Catch-all pattern is group " << catch_all_group;
}
for (auto &g : addr_groups) {
for (auto &addr : g.addrs) {
if (addr.host_unix) {
// for AF_UNIX socket, we use "localhost" as host for backend
// hostport. This is used as Host header field to backend and
// not going to be passed to any syscalls.
addr.hostport = "localhost";
auto path = addr.host.c_str();
auto pathlen = addr.host.size();
if (pathlen + 1 > sizeof(addr.addr.su.un.sun_path)) {
LOG(FATAL) << "UNIX domain socket path " << path << " is too long > "
<< sizeof(addr.addr.su.un.sun_path);
exit(EXIT_FAILURE);
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Use UNIX domain socket path " << path
<< " for backend connection";
}
addr.addr.su.un.sun_family = AF_UNIX;
// copy path including terminal NULL
std::copy_n(path, pathlen + 1, addr.addr.su.un.sun_path);
addr.addr.len = sizeof(addr.addr.su.un);
continue;
}
addr.hostport = ImmutableString(
util::make_http_hostport(StringRef(addr.host), addr.port));
auto hostport = util::make_hostport(StringRef{addr.host}, addr.port);
if (resolve_hostname(&addr.addr, addr.host.c_str(), addr.port,
downstreamconf.family) == -1) {
LOG(FATAL) << "Resolving backend address failed: " << hostport;
exit(EXIT_FAILURE);
}
LOG(NOTICE) << "Resolved backend address: " << hostport << " -> "
<< util::to_numeric_addr(&addr.addr);
}
}
auto &proxy = mod_config()->downstream_http_proxy;
if (!proxy.host.empty()) {
auto hostport = util::make_hostport(StringRef{proxy.host}, proxy.port);
......
src/shrpx_config.cc
View file @ 2fd095d0
......@@ -2904,4 +2904,193 @@ StringRef strproto(shrpx_proto proto) {
assert(0);
}
// Configures the following member in |config|: router,
// conn.downstream.addr_groups, wildcard_patterns,
int configure_downstream_group(Config *config, bool http2_proxy,
bool numeric_addr_only,
const TLSConfig &tlsconf) {
auto &downstreamconf = config->conn.downstream;
auto &addr_groups = downstreamconf.addr_groups;
if (addr_groups.empty()) {
DownstreamAddrConfig addr{};
addr.host = ImmutableString::from_lit(DEFAULT_DOWNSTREAM_HOST);
addr.port = DEFAULT_DOWNSTREAM_PORT;
addr.proto = PROTO_HTTP1;
DownstreamAddrGroupConfig g(StringRef::from_lit("/"));
g.addrs.push_back(std::move(addr));
config->router.add_route(StringRef{g.pattern}, addr_groups.size());
addr_groups.push_back(std::move(g));
} else if (http2_proxy) {
// We don't support host mapping in these cases. Move all
// non-catch-all patterns to catch-all pattern.
DownstreamAddrGroupConfig catch_all(StringRef::from_lit("/"));
for (auto &g : addr_groups) {
std::move(std::begin(g.addrs), std::end(g.addrs),
std::back_inserter(catch_all.addrs));
}
std::vector<DownstreamAddrGroupConfig>().swap(addr_groups);
std::vector<WildcardPattern>().swap(config->wildcard_patterns);
// maybe not necessary?
config->router = Router();
config->router.add_route(StringRef{catch_all.pattern}, addr_groups.size());
addr_groups.push_back(std::move(catch_all));
} else {
auto &wildcard_patterns = config->wildcard_patterns;
std::sort(std::begin(wildcard_patterns), std::end(wildcard_patterns),
[](const WildcardPattern &lhs, const WildcardPattern &rhs) {
return std::lexicographical_compare(
rhs.host.rbegin(), rhs.host.rend(), lhs.host.rbegin(),
lhs.host.rend());
});
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Reverse sorted wildcard hosts (compared from tail to head, "
"and sorted in reverse order):";
for (auto &wp : config->wildcard_patterns) {
LOG(INFO) << wp.host;
}
}
}
// backward compatibility: override all SNI fields with the option
// value --backend-tls-sni-field
if (!tlsconf.backend_sni_name.empty()) {
auto &sni = tlsconf.backend_sni_name;
for (auto &addr_group : addr_groups) {
for (auto &addr : addr_group.addrs) {
addr.sni = sni;
}
}
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Resolving backend address";
}
ssize_t catch_all_group = -1;
for (size_t i = 0; i < addr_groups.size(); ++i) {
auto &g = addr_groups[i];
if (g.pattern == StringRef::from_lit("/")) {
catch_all_group = i;
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Host-path pattern: group " << i << ": '" << g.pattern
<< "'";
for (auto &addr : g.addrs) {
LOG(INFO) << "group " << i << " -> " << addr.host.c_str()
<< (addr.host_unix ? "" : ":" + util::utos(addr.port))
<< ", proto=" << strproto(addr.proto)
<< (addr.tls ? ", tls" : "");
}
}
}
if (catch_all_group == -1) {
LOG(FATAL) << "backend: No catch-all backend address is configured";
return -1;
}
downstreamconf.addr_group_catch_all = catch_all_group;
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Catch-all pattern is group " << catch_all_group;
}
auto resolve_flags = numeric_addr_only ? AI_NUMERICHOST : 0;
for (auto &g : addr_groups) {
for (auto &addr : g.addrs) {
if (addr.host_unix) {
// for AF_UNIX socket, we use "localhost" as host for backend
// hostport. This is used as Host header field to backend and
// not going to be passed to any syscalls.
addr.hostport = "localhost";
auto path = addr.host.c_str();
auto pathlen = addr.host.size();
if (pathlen + 1 > sizeof(addr.addr.su.un.sun_path)) {
LOG(FATAL) << "UNIX domain socket path " << path << " is too long > "
<< sizeof(addr.addr.su.un.sun_path);
return -1;
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Use UNIX domain socket path " << path
<< " for backend connection";
}
addr.addr.su.un.sun_family = AF_UNIX;
// copy path including terminal NULL
std::copy_n(path, pathlen + 1, addr.addr.su.un.sun_path);
addr.addr.len = sizeof(addr.addr.su.un);
continue;
}
addr.hostport = ImmutableString(
util::make_http_hostport(StringRef(addr.host), addr.port));
auto hostport = util::make_hostport(StringRef{addr.host}, addr.port);
if (resolve_hostname(&addr.addr, addr.host.c_str(), addr.port,
downstreamconf.family, resolve_flags) == -1) {
LOG(FATAL) << "Resolving backend address failed: " << hostport;
return -1;
}
LOG(NOTICE) << "Resolved backend address: " << hostport << " -> "
<< util::to_numeric_addr(&addr.addr);
}
}
return 0;
}
int resolve_hostname(Address *addr, const char *hostname, uint16_t port,
int family, int additional_flags) {
int rv;
auto service = util::utos(port);
addrinfo hints{};
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags |= additional_flags;
#ifdef AI_ADDRCONFIG
hints.ai_flags |= AI_ADDRCONFIG;
#endif // AI_ADDRCONFIG
addrinfo *res;
rv = getaddrinfo(hostname, service.c_str(), &hints, &res);
if (rv != 0) {
LOG(FATAL) << "Unable to resolve address for " << hostname << ": "
<< gai_strerror(rv);
return -1;
}
auto res_d = defer(freeaddrinfo, res);
char host[NI_MAXHOST];
rv = getnameinfo(res->ai_addr, res->ai_addrlen, host, sizeof(host), nullptr,
0, NI_NUMERICHOST);
if (rv != 0) {
LOG(FATAL) << "Address resolution for " << hostname
<< " failed: " << gai_strerror(rv);
return -1;
}
if (LOG_ENABLED(INFO)) {
LOG(INFO) << "Address resolution for " << hostname
<< " succeeded: " << host;
}
memcpy(&addr->su, res->ai_addr, res->ai_addrlen);
addr->len = res->ai_addrlen;
return 0;
}
} // namespace shrpx
src/shrpx_config.h
View file @ 2fd095d0
......@@ -283,6 +283,9 @@ constexpr auto SHRPX_OPT_BACKEND_HTTP2_SETTINGS_TIMEOUT =
constexpr size_t SHRPX_OBFUSCATED_NODE_LENGTH = 8;
constexpr char DEFAULT_DOWNSTREAM_HOST[] = "127.0.0.1";
constexpr int16_t DEFAULT_DOWNSTREAM_PORT = 80;
enum shrpx_proto { PROTO_NONE, PROTO_HTTP1, PROTO_HTTP2, PROTO_MEMCACHED };
enum shrpx_forwarded_param {
......@@ -713,6 +716,13 @@ read_tls_ticket_key_file(const std::vector<std::string> &files,
// Returns string representation of |proto|.
StringRef strproto(shrpx_proto proto);
int configure_downstream_group(Config *config, bool http2_proxy,
bool numeric_addr_only,
const TLSConfig &tlsconf);
int resolve_hostname(Address *addr, const char *hostname, uint16_t port,
int family, int additional_flags = 0);
} // namespace shrpx
#endif // SHRPX_CONFIG_H
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