()
| 123 | } |
| 124 | |
| 125 | func (mod *PacketProxy) Configure() (err error) { |
| 126 | mod.destroyQueue() |
| 127 | |
| 128 | if err, mod.queueNum = mod.IntParam("packet.proxy.queue.num"); err != nil { |
| 129 | return |
| 130 | } else if err, mod.chainName = mod.StringParam("packet.proxy.chain"); err != nil { |
| 131 | return |
| 132 | } else if err, mod.rule = mod.StringParam("packet.proxy.rule"); err != nil { |
| 133 | return |
| 134 | } else if err, mod.pluginPath = mod.StringParam("packet.proxy.plugin"); err != nil { |
| 135 | return |
| 136 | } |
| 137 | |
| 138 | if mod.pluginPath != "" { |
| 139 | if !fs.Exists(mod.pluginPath) { |
| 140 | return fmt.Errorf("%s does not exist.", mod.pluginPath) |
| 141 | } |
| 142 | |
| 143 | mod.Info("loading packet proxy plugin from %s ...", mod.pluginPath) |
| 144 | |
| 145 | var ok bool |
| 146 | var sym plugin.Symbol |
| 147 | |
| 148 | if mod.plugin, err = plugin.Open(mod.pluginPath); err != nil { |
| 149 | return |
| 150 | } else if sym, err = mod.plugin.Lookup("OnPacket"); err != nil { |
| 151 | return |
| 152 | } else if mod.queueCb, ok = sym.(func(q *nfqueue.Nfqueue, a nfqueue.Attribute) int); !ok { |
| 153 | return fmt.Errorf("Symbol OnPacket is not a valid callback function.") |
| 154 | } |
| 155 | |
| 156 | if sym, err = mod.plugin.Lookup("OnStart"); err == nil { |
| 157 | var onStartCb func() int |
| 158 | if onStartCb, ok = sym.(func() int); !ok { |
| 159 | return fmt.Errorf("OnStart signature does not match expected signature: 'func() int'") |
| 160 | } else { |
| 161 | var result int |
| 162 | if result = onStartCb(); result != 0 { |
| 163 | return fmt.Errorf("OnStart returned non-zero result. result=%d", result) |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | } else { |
| 168 | mod.Warning("no plugin set") |
| 169 | } |
| 170 | |
| 171 | config := nfqueue.Config{ |
| 172 | NfQueue: uint16(mod.queueNum), |
| 173 | Copymode: nfqueue.NfQnlCopyPacket, |
| 174 | AfFamily: syscall.AF_INET, |
| 175 | MaxPacketLen: 0xFFFF, |
| 176 | MaxQueueLen: 0xFF, |
| 177 | WriteTimeout: 15 * time.Millisecond, |
| 178 | } |
| 179 | |
| 180 | mod.Debug("config: %+v", config) |
| 181 | |
| 182 | if err = mod.runRule(true); err != nil { |
no test coverage detected