Validate checks the self-reported DefaultNodeInfo is safe. It returns an error if there are too many Channels, if there are any duplicate Channels, if the ListenAddr is malformed, or if the ListenAddr is a host name that can not be resolved to some IP. TODO: constraints for Moniker/Other? Or is that
()
| 120 | // url-encoding), and we just need to be careful with how we handle that in our |
| 121 | // clients. (e.g. off by default). |
| 122 | func (info DefaultNodeInfo) Validate() error { |
| 123 | |
| 124 | // ID is already validated. |
| 125 | |
| 126 | // Validate ListenAddr. |
| 127 | _, err := NewNetAddressString(IDAddressString(info.ID(), info.ListenAddr)) |
| 128 | if err != nil { |
| 129 | return err |
| 130 | } |
| 131 | |
| 132 | // Network is validated in CompatibleWith. |
| 133 | |
| 134 | // Validate Version |
| 135 | if len(info.Version) > 0 && |
| 136 | (!tmstrings.IsASCIIText(info.Version) || tmstrings.ASCIITrim(info.Version) == "") { |
| 137 | |
| 138 | return fmt.Errorf("info.Version must be valid ASCII text without tabs, but got %v", info.Version) |
| 139 | } |
| 140 | |
| 141 | // Validate Channels - ensure max and check for duplicates. |
| 142 | if len(info.Channels) > maxNumChannels { |
| 143 | return fmt.Errorf("info.Channels is too long (%v). Max is %v", len(info.Channels), maxNumChannels) |
| 144 | } |
| 145 | channels := make(map[byte]struct{}) |
| 146 | for _, ch := range info.Channels { |
| 147 | _, ok := channels[ch] |
| 148 | if ok { |
| 149 | return fmt.Errorf("info.Channels contains duplicate channel id %v", ch) |
| 150 | } |
| 151 | channels[ch] = struct{}{} |
| 152 | } |
| 153 | |
| 154 | // Validate Moniker. |
| 155 | if !tmstrings.IsASCIIText(info.Moniker) || tmstrings.ASCIITrim(info.Moniker) == "" { |
| 156 | return fmt.Errorf("info.Moniker must be valid non-empty ASCII text without tabs, but got %v", info.Moniker) |
| 157 | } |
| 158 | |
| 159 | // Validate Other. |
| 160 | other := info.Other |
| 161 | txIndex := other.TxIndex |
| 162 | switch txIndex { |
| 163 | case "", "on", "off": |
| 164 | default: |
| 165 | return fmt.Errorf("info.Other.TxIndex should be either 'on', 'off', or empty string, got '%v'", txIndex) |
| 166 | } |
| 167 | // XXX: Should we be more strict about address formats? |
| 168 | rpcAddr := other.RPCAddress |
| 169 | if len(rpcAddr) > 0 && (!tmstrings.IsASCIIText(rpcAddr) || tmstrings.ASCIITrim(rpcAddr) == "") { |
| 170 | return fmt.Errorf("info.Other.RPCAddress=%v must be valid ASCII text without tabs", rpcAddr) |
| 171 | } |
| 172 | |
| 173 | return nil |
| 174 | } |
| 175 | |
| 176 | // CompatibleWith checks if two DefaultNodeInfo are compatible with eachother. |
| 177 | // CONTRACT: two nodes are compatible if the Block version and network match |