frp/pkg/config/server.go

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// Copyright 2020 The frp Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"fmt"
"strings"
"github.com/fatedier/frp/pkg/auth"
plugin "github.com/fatedier/frp/pkg/plugin/server"
"github.com/fatedier/frp/pkg/util/util"
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"github.com/go-playground/validator/v10"
"gopkg.in/ini.v1"
)
// ServerCommonConf contains information for a server service. It is
// recommended to use GetDefaultServerConf instead of creating this object
// directly, so that all unspecified fields have reasonable default values.
type ServerCommonConf struct {
auth.ServerConfig `ini:",extends"`
// BindAddr specifies the address that the server binds to. By default,
// this value is "0.0.0.0".
BindAddr string `ini:"bind_addr" json:"bind_addr"`
// BindPort specifies the port that the server listens on. By default, this
// value is 7000.
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BindPort int `ini:"bind_port" json:"bind_port" validate:"gte=0,lte=65535"`
// BindUDPPort specifies the UDP port that the server listens on. If this
// value is 0, the server will not listen for UDP connections. By default,
// this value is 0
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BindUDPPort int `ini:"bind_udp_port" json:"bind_udp_port" validate:"gte=0,lte=65535"`
// KCPBindPort specifies the KCP port that the server listens on. If this
// value is 0, the server will not listen for KCP connections. By default,
// this value is 0.
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KCPBindPort int `ini:"kcp_bind_port" json:"kcp_bind_port" validate:"gte=0,lte=65535"`
// ProxyBindAddr specifies the address that the proxy binds to. This value
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// may be the same as BindAddr.
ProxyBindAddr string `ini:"proxy_bind_addr" json:"proxy_bind_addr"`
// VhostHTTPPort specifies the port that the server listens for HTTP Vhost
// requests. If this value is 0, the server will not listen for HTTP
// requests. By default, this value is 0.
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VhostHTTPPort int `ini:"vhost_http_port" json:"vhost_http_port" validate:"gte=0,lte=65535"`
// VhostHTTPSPort specifies the port that the server listens for HTTPS
// Vhost requests. If this value is 0, the server will not listen for HTTPS
// requests. By default, this value is 0.
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VhostHTTPSPort int `ini:"vhost_https_port" json:"vhost_https_port" validate:"gte=0,lte=65535"`
// TCPMuxHTTPConnectPort specifies the port that the server listens for TCP
// HTTP CONNECT requests. If the value is 0, the server will not multiplex TCP
// requests on one single port. If it's not - it will listen on this value for
// HTTP CONNECT requests. By default, this value is 0.
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TCPMuxHTTPConnectPort int `ini:"tcpmux_httpconnect_port" json:"tcpmux_httpconnect_port" validate:"gte=0,lte=65535"`
// VhostHTTPTimeout specifies the response header timeout for the Vhost
// HTTP server, in seconds. By default, this value is 60.
VhostHTTPTimeout int64 `ini:"vhost_http_timeout" json:"vhost_http_timeout"`
// DashboardAddr specifies the address that the dashboard binds to. By
// default, this value is "0.0.0.0".
DashboardAddr string `ini:"dashboard_addr" json:"dashboard_addr"`
// DashboardPort specifies the port that the dashboard listens on. If this
// value is 0, the dashboard will not be started. By default, this value is
// 0.
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DashboardPort int `ini:"dashboard_port" json:"dashboard_port" validate:"gte=0,lte=65535"`
// DashboardUser specifies the username that the dashboard will use for
// login.
DashboardUser string `ini:"dashboard_user" json:"dashboard_user"`
// DashboardPwd specifies the password that the dashboard will use for
// login.
DashboardPwd string `ini:"dashboard_pwd" json:"dashboard_pwd"`
// EnablePrometheus will export prometheus metrics on {dashboard_addr}:{dashboard_port}
// in /metrics api.
EnablePrometheus bool `ini:"enable_prometheus" json:"enable_prometheus"`
// AssetsDir specifies the local directory that the dashboard will load
// resources from. If this value is "", assets will be loaded from the
// bundled executable using statik. By default, this value is "".
AssetsDir string `ini:"assets_dir" json:"assets_dir"`
// LogFile specifies a file where logs will be written to. This value will
// only be used if LogWay is set appropriately. By default, this value is
// "console".
LogFile string `ini:"log_file" json:"log_file"`
// LogWay specifies the way logging is managed. Valid values are "console"
// or "file". If "console" is used, logs will be printed to stdout. If
// "file" is used, logs will be printed to LogFile. By default, this value
// is "console".
LogWay string `ini:"log_way" json:"log_way"`
// LogLevel specifies the minimum log level. Valid values are "trace",
// "debug", "info", "warn", and "error". By default, this value is "info".
LogLevel string `ini:"log_level" json:"log_level"`
// LogMaxDays specifies the maximum number of days to store log information
// before deletion. This is only used if LogWay == "file". By default, this
// value is 0.
LogMaxDays int64 `ini:"log_max_days" json:"log_max_days"`
// DisableLogColor disables log colors when LogWay == "console" when set to
// true. By default, this value is false.
DisableLogColor bool `ini:"disable_log_color" json:"disable_log_color"`
// DetailedErrorsToClient defines whether to send the specific error (with
// debug info) to frpc. By default, this value is true.
DetailedErrorsToClient bool `ini:"detailed_errors_to_client" json:"detailed_errors_to_client"`
// SubDomainHost specifies the domain that will be attached to sub-domains
// requested by the client when using Vhost proxying. For example, if this
// value is set to "frps.com" and the client requested the subdomain
// "test", the resulting URL would be "test.frps.com". By default, this
// value is "".
SubDomainHost string `ini:"subdomain_host" json:"subdomain_host"`
// TCPMux toggles TCP stream multiplexing. This allows multiple requests
// from a client to share a single TCP connection. By default, this value
// is true.
TCPMux bool `ini:"tcp_mux" json:"tcp_mux"`
// TCPMuxKeepaliveInterval specifies the keep alive interval for TCP stream multipler.
// If TCPMux is true, heartbeat of application layer is unnecessary because it can only rely on heartbeat in TCPMux.
TCPMuxKeepaliveInterval int64 `ini:"tcp_mux_keepalive_interval" json:"tcp_mux_keepalive_interval"`
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// TCPKeepAlive specifies the interval between keep-alive probes for an active network connection between frpc and frps.
// If negative, keep-alive probes are disabled.
TCPKeepAlive int64 `ini:"tcp_keepalive" json:"tcp_keepalive"`
// Custom404Page specifies a path to a custom 404 page to display. If this
// value is "", a default page will be displayed. By default, this value is
// "".
Custom404Page string `ini:"custom_404_page" json:"custom_404_page"`
// AllowPorts specifies a set of ports that clients are able to proxy to.
// If the length of this value is 0, all ports are allowed. By default,
// this value is an empty set.
AllowPorts map[int]struct{} `ini:"-" json:"-"`
// MaxPoolCount specifies the maximum pool size for each proxy. By default,
// this value is 5.
MaxPoolCount int64 `ini:"max_pool_count" json:"max_pool_count"`
// MaxPortsPerClient specifies the maximum number of ports a single client
// may proxy to. If this value is 0, no limit will be applied. By default,
// this value is 0.
MaxPortsPerClient int64 `ini:"max_ports_per_client" json:"max_ports_per_client"`
// TLSOnly specifies whether to only accept TLS-encrypted connections.
// By default, the value is false.
TLSOnly bool `ini:"tls_only" json:"tls_only"`
// TLSCertFile specifies the path of the cert file that the server will
// load. If "tls_cert_file", "tls_key_file" are valid, the server will use this
// supplied tls configuration. Otherwise, the server will use the tls
// configuration generated by itself.
TLSCertFile string `ini:"tls_cert_file" json:"tls_cert_file"`
// TLSKeyFile specifies the path of the secret key that the server will
// load. If "tls_cert_file", "tls_key_file" are valid, the server will use this
// supplied tls configuration. Otherwise, the server will use the tls
// configuration generated by itself.
TLSKeyFile string `ini:"tls_key_file" json:"tls_key_file"`
// TLSTrustedCaFile specifies the paths of the client cert files that the
// server will load. It only works when "tls_only" is true. If
// "tls_trusted_ca_file" is valid, the server will verify each client's
// certificate.
TLSTrustedCaFile string `ini:"tls_trusted_ca_file" json:"tls_trusted_ca_file"`
// HeartBeatTimeout specifies the maximum time to wait for a heartbeat
// before terminating the connection. It is not recommended to change this
// value. By default, this value is 90. Set negative value to disable it.
HeartbeatTimeout int64 `ini:"heartbeat_timeout" json:"heartbeat_timeout"`
// UserConnTimeout specifies the maximum time to wait for a work
// connection. By default, this value is 10.
UserConnTimeout int64 `ini:"user_conn_timeout" json:"user_conn_timeout"`
// HTTPPlugins specify the server plugins support HTTP protocol.
HTTPPlugins map[string]plugin.HTTPPluginOptions `ini:"-" json:"http_plugins"`
// UDPPacketSize specifies the UDP packet size
// By default, this value is 1500
UDPPacketSize int64 `ini:"udp_packet_size" json:"udp_packet_size"`
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// Enable golang pprof handlers in dashboard listener.
// Dashboard port must be set first.
PprofEnable bool `ini:"pprof_enable" json:"pprof_enable"`
}
// GetDefaultServerConf returns a server configuration with reasonable
// defaults.
func GetDefaultServerConf() ServerCommonConf {
return ServerCommonConf{
ServerConfig: auth.GetDefaultServerConf(),
BindAddr: "0.0.0.0",
BindPort: 7000,
BindUDPPort: 0,
KCPBindPort: 0,
ProxyBindAddr: "",
VhostHTTPPort: 0,
VhostHTTPSPort: 0,
TCPMuxHTTPConnectPort: 0,
VhostHTTPTimeout: 60,
DashboardAddr: "0.0.0.0",
DashboardPort: 0,
DashboardUser: "",
DashboardPwd: "",
EnablePrometheus: false,
AssetsDir: "",
LogFile: "console",
LogWay: "console",
LogLevel: "info",
LogMaxDays: 3,
DisableLogColor: false,
DetailedErrorsToClient: true,
SubDomainHost: "",
TCPMux: true,
TCPMuxKeepaliveInterval: 60,
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TCPKeepAlive: 7200,
AllowPorts: make(map[int]struct{}),
MaxPoolCount: 5,
MaxPortsPerClient: 0,
TLSOnly: false,
TLSCertFile: "",
TLSKeyFile: "",
TLSTrustedCaFile: "",
HeartbeatTimeout: 90,
UserConnTimeout: 10,
Custom404Page: "",
HTTPPlugins: make(map[string]plugin.HTTPPluginOptions),
UDPPacketSize: 1500,
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PprofEnable: false,
}
}
func UnmarshalServerConfFromIni(source interface{}) (ServerCommonConf, error) {
f, err := ini.LoadSources(ini.LoadOptions{
Insensitive: false,
InsensitiveSections: false,
InsensitiveKeys: false,
IgnoreInlineComment: true,
AllowBooleanKeys: true,
}, source)
if err != nil {
return ServerCommonConf{}, err
}
s, err := f.GetSection("common")
if err != nil {
return ServerCommonConf{}, err
}
common := GetDefaultServerConf()
err = s.MapTo(&common)
if err != nil {
return ServerCommonConf{}, err
}
// allow_ports
allowPortStr := s.Key("allow_ports").String()
if allowPortStr != "" {
allowPorts, err := util.ParseRangeNumbers(allowPortStr)
if err != nil {
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return ServerCommonConf{}, fmt.Errorf("invalid allow_ports: %v", err)
}
for _, port := range allowPorts {
common.AllowPorts[int(port)] = struct{}{}
}
}
// plugin.xxx
pluginOpts := make(map[string]plugin.HTTPPluginOptions)
for _, section := range f.Sections() {
name := section.Name()
if !strings.HasPrefix(name, "plugin.") {
continue
}
opt, err := loadHTTPPluginOpt(section)
if err != nil {
return ServerCommonConf{}, err
}
pluginOpts[opt.Name] = *opt
}
common.HTTPPlugins = pluginOpts
return common, nil
}
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func (cfg *ServerCommonConf) Complete() {
if cfg.LogFile == "console" {
cfg.LogWay = "console"
} else {
cfg.LogWay = "file"
}
if cfg.ProxyBindAddr == "" {
cfg.ProxyBindAddr = cfg.BindAddr
}
if cfg.TLSTrustedCaFile != "" {
cfg.TLSOnly = true
}
}
func (cfg *ServerCommonConf) Validate() error {
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return validator.New().Struct(cfg)
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}
func loadHTTPPluginOpt(section *ini.Section) (*plugin.HTTPPluginOptions, error) {
name := strings.TrimSpace(strings.TrimPrefix(section.Name(), "plugin."))
opt := new(plugin.HTTPPluginOptions)
err := section.MapTo(opt)
if err != nil {
return nil, err
}
opt.Name = name
return opt, nil
}