| 1 | package policy |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "net" |
| 6 | |
| 7 | "github.com/gosuda/portal-tunnel/v2/utils" |
| 8 | ) |
| 9 | |
| 10 | type PortPolicy struct { |
| 11 | enabled bool |
| 12 | maxLeases int |
| 13 | } |
| 14 | |
| 15 | func (p PortPolicy) IsEnabled() bool { return p.enabled } |
| 16 | func (p PortPolicy) MaxLeases() int { return p.maxLeases } |
| 17 | |
| 18 | func (p *PortPolicy) Set(enabled bool, maxLeases int) { |
| 19 | p.enabled = enabled |
| 20 | p.maxLeases = maxLeases |
| 21 | } |
| 22 | |
| 23 | type runtimeConfig struct { |
| 24 | udp PortPolicy |
| 25 | tcpPort PortPolicy |
| 26 | trustProxyHeaders bool |
| 27 | trustedProxyCIDRs []*net.IPNet |
| 28 | } |
| 29 | |
| 30 | func (cfg runtimeConfig) snapshot() runtimeConfig { |
| 31 | cfg.trustedProxyCIDRs = utils.CloneSlice(cfg.trustedProxyCIDRs) |
| 32 | return cfg |
| 33 | } |
| 34 | |
| 35 | type Runtime struct { |
| 36 | approver *Approver |
| 37 | bpsManager *BPSManager |
| 38 | ipFilter *IPFilter |
| 39 | config *utils.Snapshot[runtimeConfig] |
| 40 | bannedIdentityKeys *utils.Snapshot[map[string]struct{}] |
| 41 | } |
| 42 | |
| 43 | func NewRuntime(udpEnabled, tcpPortEnabled bool, trustProxyHeaders bool, rawTrustedProxyCIDRs string) (*Runtime, error) { |
| 44 | runtime := &Runtime{ |
| 45 | approver: NewApprover(), |
| 46 | bpsManager: NewBPSManager(), |
| 47 | ipFilter: NewIPFilter(), |
| 48 | config: utils.NewSnapshot(runtimeConfig{ |
| 49 | udp: PortPolicy{enabled: udpEnabled}, |
| 50 | tcpPort: PortPolicy{enabled: tcpPortEnabled}, |
| 51 | }, runtimeConfig.snapshot), |
| 52 | bannedIdentityKeys: utils.NewSnapshot(map[string]struct{}{}, utils.CloneMap[string, struct{}]), |
| 53 | } |
| 54 | if err := runtime.SetProxyTrust(trustProxyHeaders, rawTrustedProxyCIDRs); err != nil { |
| 55 | return nil, err |
| 56 | } |
| 57 | return runtime, nil |
| 58 | } |
| 59 | |
| 60 | func (r *Runtime) Approver() *Approver { |
| 61 | return r.approver |
| 62 | } |
| 63 | |
| 64 | func (r *Runtime) IPFilter() *IPFilter { |
| 65 | return r.ipFilter |
| 66 | } |
| 67 | |
| 68 | func (r *Runtime) BPSManager() *BPSManager { |
| 69 | return r.bpsManager |
| 70 | } |
| 71 | |
| 72 | func (r *Runtime) BanIdentity(key string) { |
| 73 | if r == nil || r.bannedIdentityKeys == nil || key == "" { |
| 74 | return |
| 75 | } |
| 76 | r.bannedIdentityKeys.UpdateCopy(func(keys *map[string]struct{}) { |
| 77 | if *keys == nil { |
| 78 | *keys = make(map[string]struct{}) |
| 79 | } |
| 80 | (*keys)[key] = struct{}{} |
| 81 | }) |
| 82 | } |
| 83 | |
| 84 | func (r *Runtime) UnbanIdentity(key string) { |
| 85 | if r == nil || r.bannedIdentityKeys == nil || key == "" { |
| 86 | return |
| 87 | } |
| 88 | r.bannedIdentityKeys.UpdateCopy(func(keys *map[string]struct{}) { |
| 89 | delete(*keys, key) |
| 90 | }) |
| 91 | } |
| 92 | |
| 93 | func (r *Runtime) IsIdentityBanned(key string) bool { |
| 94 | if r == nil || r.bannedIdentityKeys == nil || key == "" { |
| 95 | return false |
| 96 | } |
| 97 | _, ok := r.bannedIdentityKeys.Load()[key] |
| 98 | return ok |
| 99 | } |
| 100 | |
| 101 | func (r *Runtime) BannedIdentityKeys() []string { |
| 102 | if r == nil || r.bannedIdentityKeys == nil { |
| 103 | return nil |
| 104 | } |
| 105 | keys := r.bannedIdentityKeys.Load() |
| 106 | out := make([]string, 0, len(keys)) |
| 107 | for key := range keys { |
| 108 | out = append(out, key) |
| 109 | } |
| 110 | return out |
| 111 | } |
| 112 | |
| 113 | func (r *Runtime) SetBannedIdentityKeys(keys []string) { |
| 114 | if r == nil || r.bannedIdentityKeys == nil { |
| 115 | return |
| 116 | } |
| 117 | bannedIdentityKeys := make(map[string]struct{}, len(keys)) |
| 118 | for _, key := range keys { |
| 119 | if key == "" { |
| 120 | continue |
| 121 | } |
| 122 | bannedIdentityKeys[key] = struct{}{} |
| 123 | } |
| 124 | |
| 125 | r.bannedIdentityKeys.Store(bannedIdentityKeys) |
| 126 | } |
| 127 | |
| 128 | func (r *Runtime) EffectiveApproval(key string) bool { |
| 129 | if r.approver == nil || key == "" { |
| 130 | return true |
| 131 | } |
| 132 | if r.approver.Mode() == ModeAuto { |
| 133 | return true |
| 134 | } |
| 135 | return r.approver.IsApproved(key) |
| 136 | } |
| 137 | |
| 138 | func (r *Runtime) IsIdentityDenied(key string) bool { |
| 139 | if r.approver == nil || key == "" { |
| 140 | return false |
| 141 | } |
| 142 | return r.approver.IsDenied(key) |
| 143 | } |
| 144 | |
| 145 | func (r *Runtime) IsIdentityRoutable(key string) bool { |
| 146 | if r.IsIdentityBanned(key) || r.IsIdentityDenied(key) { |
| 147 | return false |
| 148 | } |
| 149 | return r.EffectiveApproval(key) |
| 150 | } |
| 151 | |
| 152 | func (r *Runtime) SetUDPPolicy(enabled bool, maxLeases int) { |
| 153 | if r == nil || r.config == nil { |
| 154 | return |
| 155 | } |
| 156 | r.config.UpdateCopy(func(cfg *runtimeConfig) { |
| 157 | cfg.udp.Set(enabled, maxLeases) |
| 158 | }) |
| 159 | } |
| 160 | |
| 161 | func (r *Runtime) IsUDPEnabled() bool { |
| 162 | if r == nil || r.config == nil { |
| 163 | return false |
| 164 | } |
| 165 | return r.config.Load().udp.IsEnabled() |
| 166 | } |
| 167 | |
| 168 | func (r *Runtime) UDPMaxLeases() int { |
| 169 | if r == nil || r.config == nil { |
| 170 | return 0 |
| 171 | } |
| 172 | return r.config.Load().udp.MaxLeases() |
| 173 | } |
| 174 | |
| 175 | func (r *Runtime) SetTCPPortPolicy(enabled bool, maxLeases int) { |
| 176 | if r == nil || r.config == nil { |
| 177 | return |
| 178 | } |
| 179 | r.config.UpdateCopy(func(cfg *runtimeConfig) { |
| 180 | cfg.tcpPort.Set(enabled, maxLeases) |
| 181 | }) |
| 182 | } |
| 183 | |
| 184 | func (r *Runtime) SetProxyTrust(trustProxyHeaders bool, rawTrustedProxyCIDRs string) error { |
| 185 | if r == nil { |
| 186 | return nil |
| 187 | } |
| 188 | trustedProxyCIDRs, err := utils.ParseCIDRs(rawTrustedProxyCIDRs) |
| 189 | if err != nil { |
| 190 | return fmt.Errorf("parse trusted proxy cidrs: %w", err) |
| 191 | } |
| 192 | if r.config == nil { |
| 193 | r.config = utils.NewSnapshot(runtimeConfig{}, runtimeConfig.snapshot) |
| 194 | } |
| 195 | r.config.UpdateCopy(func(cfg *runtimeConfig) { |
| 196 | cfg.trustProxyHeaders = trustProxyHeaders |
| 197 | cfg.trustedProxyCIDRs = append([]*net.IPNet(nil), trustedProxyCIDRs...) |
| 198 | }) |
| 199 | return nil |
| 200 | } |
| 201 | |
| 202 | func (r *Runtime) IsTCPPortEnabled() bool { |
| 203 | if r == nil || r.config == nil { |
| 204 | return false |
| 205 | } |
| 206 | return r.config.Load().tcpPort.IsEnabled() |
| 207 | } |
| 208 | |
| 209 | func (r *Runtime) TCPPortMaxLeases() int { |
| 210 | if r == nil || r.config == nil { |
| 211 | return 0 |
| 212 | } |
| 213 | return r.config.Load().tcpPort.MaxLeases() |
| 214 | } |
| 215 | |
| 216 | func (r *Runtime) ForgetIdentity(key string) { |
| 217 | if r.ipFilter != nil { |
| 218 | r.ipFilter.RemoveIdentityIP(key) |
| 219 | } |
| 220 | if r.bpsManager != nil { |
| 221 | r.bpsManager.DeleteIdentityBPS(key) |
| 222 | } |
| 223 | } |