| 135 | } |
| 136 | |
| 137 | func (d *SFDecoder) sfHeaderDecode() (*SFDatagram, error) { |
| 138 | var ( |
| 139 | datagram = &SFDatagram{} |
| 140 | ipLen = 4 |
| 141 | err error |
| 142 | ) |
| 143 | |
| 144 | if err = read(d.reader, &datagram.Version); err != nil { |
| 145 | return nil, err |
| 146 | } |
| 147 | |
| 148 | if datagram.Version != 5 { |
| 149 | return nil, errSFVersionNotSupport |
| 150 | } |
| 151 | |
| 152 | if err = read(d.reader, &datagram.IPVersion); err != nil { |
| 153 | return nil, err |
| 154 | } |
| 155 | |
| 156 | // read the agent ip address |
| 157 | if datagram.IPVersion == 2 { |
| 158 | ipLen = 16 |
| 159 | } |
| 160 | buff := make([]byte, ipLen) |
| 161 | if _, err = d.reader.Read(buff); err != nil { |
| 162 | return nil, err |
| 163 | } |
| 164 | datagram.IPAddress = buff |
| 165 | |
| 166 | if err = read(d.reader, &datagram.AgentSubID); err != nil { |
| 167 | return nil, err |
| 168 | } |
| 169 | if err = read(d.reader, &datagram.SequenceNo); err != nil { |
| 170 | return nil, err |
| 171 | } |
| 172 | if err = read(d.reader, &datagram.SysUpTime); err != nil { |
| 173 | return nil, err |
| 174 | } |
| 175 | if err = read(d.reader, &datagram.SamplesNo); err != nil { |
| 176 | return nil, err |
| 177 | } |
| 178 | |
| 179 | datagram.ColTime = time.Now().Unix() |
| 180 | |
| 181 | return datagram, nil |
| 182 | } |
| 183 | |
| 184 | func (d *SFDecoder) getSampleInfo() (uint32, uint32, error) { |
| 185 | var ( |